Action Plan for Spectrum Reallocation (Revised in October 2006 )
In light of the evaluation results (released on July 12th, 2006) from the survey on actual
radio spectrum usage conducted in fiscal 2005 and progress on all the approaches to the
efficient use of radio spectrum, the Ministry of Internal Affairs and Communications (MIC) is
making the following revisions to the "Action Plan for Spectrum Reallocation."
1. Background and Objectives
In light of the "Radio Policy Vision" (report from the Telecommunications Council in July
2003), MIC is deploying, but not limited to, measures included in the "Frequency Open
Policy" that sets up strategies such as the implementation of the spectrum reorganization
and the promotion of research and development of technologies for the efficient use of
radio spectrum as the main pillars in order to build one of the world’s most advanced
wireless broadband environments and revitalize Japan's economy.
With regard to the implementation of spectrum reorganization, MIC announced the
"Guidelines for Spectrum Reallocation" in October, 2003 that presented the basic principles
to be applied when approaching spectrum reallocation in order to promptly and smoothly
secure frequencies required for deploying mobile radio communications systems and other
systems such as high-power wireless access systems including high-power wireless LAN
systems (that are allocated to a dedicated frequency band(s); hereinafter called
"high-power wireless access systems") that would play a central role in the wireless
broadband environment.
In order to realize the "Guidelines for Spectrum Reallocation," MIC conducts a survey on
actual radio spectrum usage (hereinafter called "actual usage survey") every fiscal year and
evaluates several items, including but not limited to the degree of efficiency in the use of the
radio spectrum and the feasibility of replacing radio stations with alternatives such as
optical fiber transmission based on, but not limited to, the usage status such as the volume
of communications and the real picture on the usage of radio stations, which MIC
determines from the survey. MIC presents the evaluation results to public hearing
procedures and the Radio Regulatory Council consultation process and makes them public
as a "Summary of Results of Survey and Assessment on Actual Radio Spectrum Usage"
through these transparent and equitable procedures.
In addition to these efforts, MIC developed the "Action Plan for Spectrum Reallocation" in
August 2004 to ensure a smooth and stable follow-up of concrete spectrum reallocation
processes based on the relevant evaluation results and subsequently keeps the Action
Plan up to date in a timely manner in the light of information such as the evaluation results
from the actual usage survey in every fiscal year and the change in radio spectrum use
environments.
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In response to the evaluation results from the actual usage survey conducted (on
frequencies below 770 MHz) in fiscal 2005 that were released recently, MIC decided to
review this "Action Plan for Spectrum Reallocation."
In this review, MIC not only added an additional action plan for each of the frequency
segments of the below 26.175 MHz, the 50-222 MHz band, the 222-335.4 MHz band, and
the 335.4-770 MHz band, but also kept the existing action plans up to date based on the
progress of each approach in the light of the evaluation results from the fiscal 2005 actual
usage survey.
For the following frequency segments, MIC (1) streamlines its Current Status and
Considerations, (2) sets up its Policy on Basic Approach, and (3) summarizes Concrete
Measures Based on the Policy:
２
1) Below 26.175 MHz
2) 50-222 MHz band
3) 222-335.4 MHz band
4) 335.4-770 MHz band
5) 770-960 MHz band
6) 1.4-1.71 GHz band
7) 3.4-3.6 GHz band
8) 3.6-4.2 GHz band and 4.4-5.0 GHz band
9) 5.25-5.85 GHz band
10) 13.25-15.4 GHz band
11) 15.4-21.2 GHz band
12) Untapped frequency bands (above 30 GHz)
2.
Direction of Measures for Efficient Use of Radio Spectrum Used by Fixed
Wireless Systems, Radiolocation Systems and Satellite Radio
Communications Systems
In order to promptly and smoothly secure the required frequencies and address well the
increase in demand for mobile radio communications systems and other systems such as
high-power wireless access systems that are expected to be deployed in future, it is
necessary to summarize the direction of measures to use the radio spectrum efficiently that
would be especially used by (1) fixed wireless systems, (2) radiolocation systems, and (3)
satellite radio communications systems from the viewpoint of the efficient use of radio
spectrum. Based on this stance, "the Study Group for Wireless Broadband Promotion"
(held from November 2004 to December 2005) discussed and summarized the direction in
the form of an interim report in April, 2005 and released their finalized report in December
of the same year. MIC will take into account the findings of the report when considering
anything concrete related to these systems.
３
3. Action Plan for Each Frequency Band
I. Below 26.175 MHz
(1) Current Status and Considerations
The frequency band below 26.175 MHz is mainly utilized by radio spectrum usage
systems that use frequencies in compliance with the relevant international rules, such as
radio communications systems in the aviation and maritime fields and oversees
international broadcasting that are indispensable for ensuring the safety of human lives
globally.
In addition, the fiscal 2005 actual usage survey produced evaluation results indicating
that it was necessary to give consideration to the expansion of the frequency for amateur
radio communications in the 3.8 MHz band, in which the shortage of frequencies is
severe mainly due to domestic factors.
(2) Policy on Basic Approach
Concerning the 3.8 MHz band used by amateur radio systems, as the frequency width
is too narrow for the number of amateur radio stations and the shortage of frequencies is
severe in this band, it is necessary to consider expanding the frequency band(s)
available to these systems while paying attention to the frequency situation in this
frequency band.
(3) Concrete Measures
MIC intends to consider expanding the frequency band available to amateur radio
systems while looking at information such as the status of how other existing systems
are using frequencies in the 3.8 MHz band and come to a conclusion on this matter
within this fiscal year.
II. 50-222 MHz Band
(1) Current Status and Considerations
In the 50-222 MHz frequency band, radio communications systems in the aviation and
maritime fields are using frequencies in compliance with relevant international rules. In
contrast,
the
land-based
radio
communications
systems
include
many
customer-provided telecommunication systems for public and general services, etc. and
the shortage of the required frequency bandwidths is severe, especially in urban areas.
For this reason, MIC is deploying measures to use the radio spectrum efficiently such as
conversion from analog to digital transmission.
In addition, the fiscal 2005 actual usage survey produced evaluation results indicating
４
that it was necessary to take action on public services, including promoting the
digitization of disaster contingency radio systems, because they are indispensable for
the security and safety of Japanese citizens. This would also help in addressing the
shortage of frequency bandwidths from which customer-provided telecommunication
systems have suffered in the light of discussions on the efficient use of the frequencies
that would be freed up in the wake of digitizing terrestrial TV broadcasting services.
(2) Policy on Basic Approach
a. Disaster contingency radio systems (60 MHz band) and prefecture disaster
contingency terminal radio systems (60 MHz band)
As the Frequency Assignment Plan (Notice No. 746 of 2000 from the Ministry of
Posts and Telecommunications) stipulates that disaster contingency radio and
prefecture disaster contingency terminal radio systems that use the 57.8675-60.5375
MHz and 60.7925-68 MHz frequency bands must stop using the frequency bands by
November 30th, 2007, information such as the change in the number of radio stations
for these systems must be watched carefully to ensure that the frequency reallocation
and other action items for these systems are smoothly completed by that date.
b. Commercial telecommunications radio systems (60 MHz band) and meteorological
radio systems (60 MHz band)
As many of the commercial telecommunications radio and meteorological radio
systems that use the 60 MHz band are shifting to other telecommunications systems and
consequently the demand for the band is decreasing, MIC plans to consider abolishing or
replacing them with general-purpose systems while looking at information such as the
trend towards a decrease in demand with special attention to, but not limited to, the
necessity for continuous operation to provide services to areas that lack any alternative
telecommunications systems or profitability or for which all means of communication
could be disconnected at the time of a disaster.
c. Disaster contingency radio systems (150 MHz band), community contingency
radio systems (150 MHz band), and fire radio systems (150 MHz band)
MIC plans to concentrate analog disaster contingency radio systems in the 260 MHz
band as early as possible in conjunction with the digitization process. This band is the
reallocation destination for digital disaster contingency radio systems, because these
analog systems are being distributed to frequency bands other than the 150 MHz band,
thereby attempting to improve the efficiency of use of the frequencies.
d. Efficient use of frequency bands freed up by digitizing terrestrial TV broadcasting
services (90-108 MHz and 170-222 MHz)
The Frequency Assignment Plan stipulates that the frequency bands of 90-108 MHz
(channels 1 to 3) and 170-222 MHz (channels 4 to 12) that the terrestrial analog TV
broadcasting services are now using will be used for other applications after said
５
services are discontinued on July 24th, 2011. It is appropriate for the fiscal 2008 actual
usage survey to study in detail the usage of said frequency bands after analog TV
broadcasting services have been discontinued, because the Telecommunications
Council invites the public to propose systems for radio spectrum use if they plan or
envisage deploying such systems; it is studying technical considerations and will conduct
a basic review of the usage.
(3) Concrete Measures
a. Disaster contingency radio systems (60 MHz band) and prefecture disaster
contingency terminal radio systems (60 MHz band)
In order to ensure the smooth completion of frequency reallocation, etc. by
November 30th, 2007, MIC intends to check the number of radio stations for these
systems biannually (every April and October) by using information recorded in the
Integrated Radio Stations Database and post the results on the MIC website.
b. Commercial telecommunications radio systems (60 MHz band) and meteorological
radio systems (60 MHz band)
1) In order to keep track of the changes in the number of radio stations, MIC intends to
check biannually (every April and October), using information recorded in the
Integrated Radio Stations Database and post the results on the MIC website.
2) MIC intends to study the effects of abolishing these systems and the necessity for
alternatives such as other telecommunications systems within this fiscal year.
3) In the light of results derived from items 1) and 2) above and other information, MIC
intends to consider whether or not it is possible to abolish or replace these systems
with general-purpose systems, and will come out with a definite directive on the
possibility by fiscal 2007.
c. Disaster contingency radio systems (150 MHz band), community contingency
radio systems (150 MHz band), and fire radio systems (150 MHz band)
1) In order to keep track of the changes in the number of radio stations, MIC intends to
check biannually (every April and October) using information recorded in the
Integrated Radio Stations Database and post the results on the MIC website.
2) MIC intends to give consideration to the date of validity of the frequency band for
disaster contingency radio systems (150 MHz band) and community contingency
radio systems (150 MHz band), and will come out with a definite directive on the
matter within this fiscal year.
3) Since the Examination Standards for the Radio Law (MIC Ministerial Order No. 67 of
January 6th, 2001) stipulates that fire radio systems (150 MHz band) must stop
using the frequency band by May 31st, 2016, MIC intends to reflect this provision in
the Frequency Assignment Plan within this fiscal year.
d. Efficient use of frequency bands (90-108 MHz and 170-222 MHz) freed up by
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digitizing terrestrial TV broadcasting services
1) MIC intends to pay close attention to the development of deliberations on the
efficient use of radio spectrum in the VHF/UHF band in the Telecommunications
Council (that received the consultation request on March, 2006 and plans to report
on it around June 2007).
2) MIC intends to assess in detail the efficient use of this frequency band in the fiscal
2008 actual usage survey in the light of the results from item 1) above.
III. 222-335.4 MHz Band
(1) Current Status and Considerations
Digital disaster contingency radio systems have been deployed in the 260 MHz band
in the 222-335.4 MHz frequency band, and analog disaster contingency radio systems
that are using the 60 MHz band, 150 MHz band, 400 MHz band, and other bands are
also being concentrated there.
In addition, the fiscal 2005 actual usage survey produced results indicating that it was
appropriate to consider reducing the frequency band in line with the demand for
commercial telecommunications service pagers (in the 280 MHz band) and turning the
freed-up bandwidth over to other applications.
(2) Policy on Basic Approach
As commercial telecommunications service pager systems (in the 280 MHz band) are
facing a substantial decrease in the number of subscribers to radio paging (pager)
services due to the spread of cellular phone mail, it is necessary to consider the efficient
use of frequencies in future with attention to, but not limited to, a reduction in the
frequencies.
(3) Concrete Measures
1) In order to keep track of the number of radio stations and the number of subscribers to
radio paging services, MIC intends to check the number of commercial
telecommunication service pagers (in the 280 MHz band) biannually (every April and
October) by using information recorded in the Integrated Radio Stations Database and
other information such as the number of subscriptions that are summarized based on
reports from telecommunications carriers, and post the results on the MIC website.
2) In the light of the results from item 1) above, MIC intends to consider reducing the
width of the frequency band and come out with a definite directive on the matter by
fiscal 2007.
７
IV. 335.4-770 MHz Band
(1) Current Status and Considerations
In addition to radio communications systems in the aviation and maritime fields that
are using frequencies in compliance with the relevant international rules, land-based
radio communications systems including customer-provided radio systems for public and
general services, etc., the 335.4-770 MHz frequency band is undergoing a process of
deploying measures to use frequency bands more efficiently in the transition process
from analog to digital transmission. In addition, as some of the bands that terrestrial
analog TV broadcasting services are now using will be freed up in the wake of digitizing
the services, consideration is being given to the efficient use of the bands that will be
freed up.
The fiscal 2005 actual usage survey also produced results indicating that it was
appropriate to concentrate analog disaster contingency radio systems as early as
possible in the 260 MHz band, which is the reallocation destination for digital disaster
contingency radio systems, and to consider not only reducing the congestion between
convenience radio stations but also narrowing the band and introducing digital
transmission for the stations.
(2) Policy on Basic Approach
a. Disaster contingency radio systems (400 MHz band), prefecture disaster
contingency terminal radio systems (400 MHz band), and community contingency
radio systems (400 MHz band)
MIC plans to concentrate analog disaster contingency radio systems in the 260 MHz
band, which is the reallocation destination for digital disaster contingency radio systems
because said analog systems are to be distributed to frequency bands other than the 400
MHz band as early as possible in conjunction with digitization, and thereby attempt to
improve the efficiency of use of these frequencies.
b. Convenience radio systems (350 MHz band and 400 MHz band)
With regard to the convenience radio systems that have the largest number of radio
stations in this frequency band, MIC plans to consider not only reducing the congestion
in this segment, but also narrowing the frequency bands that they are using and
introducing digital transmission from the viewpoint of the efficient use of frequencies.
c. Efficient use of frequency band (710-770 MHz) freed up by digitizing terrestrial TV
broadcasting services
The Frequency Assignment Plan stipulates that the 710-770 MHz frequency band
(channels 53 to 62) within the 470-770 MHz frequency band (channels 13 to 62) that
terrestrial analog TV broadcasting services are now using will be used for mobile radio
communications from July 25th, 2012 (the 710-722 MHz frequency band (channels 53
８
and 54) are also permitted to be used by broadcasting services other than TV
broadcasting). It is appropriate that the fiscal 2008 actual usage survey should study in
detail the usage of the 710-770 MHz band, because the Telecommunications Council
invites the public to propose radio spectrum usage systems if they plan or envisage
deploying such systems and is studying the technical considerations and will conduct a
fundamental review of said usage, based on the Telecommunications Council report of
June 25th, 2003*.
*Interim report concerning "the technical conditions for the effective use of mobile commercial-use
frequencies in the 800 MHz range" in "Measures for the Effective Use of Frequencies for Cellular
Phones, Etc." for Consultation No. 81
(3) Concrete Measures
a. Disaster contingency radio systems (400 MHz band), prefecture disaster
contingency terminal radio systems (400 MHz band), and community contingency
radio systems (400 MHz band)
1) In order to keep track of the changes in the number of radio stations, MIC intends to
check it biannually (every April and October) using information recorded in the
Integrated Radio Stations Database and post the results on the MIC website.
2) MIC intends to give consideration to the date of validity of the frequency bands for
these systems and come out with a definite directive on the matter within this fiscal
year.
b. Convenience radio systems (350 MHz band and 400 MHz band)
MIC intends to consider discontinuing analog transmissions, introducing digital
transmission and narrowing the frequency bands and it will draw a conclusion on these
matters within this fiscal year.
c. Efficient use of frequency bands (710-770 MHz) freed up by digitizing terrestrial TV
broadcasting services
1) MIC intends to pay close attention to the development of deliberations on the
efficient use of radio spectrum in the VHF/UHF band in the Telecommunications
Council (that received the consultation request on March, 2006 and plans to report
on it around June, 2007).
2) MIC intends to assess in detail the efficient use of this frequency band in the fiscal
2008 actual usage survey in the light of the results from item 1) above.
V. 770-960 MHz Band
(1) Current Status and Considerations
The 770-960 MHz frequency band is now mainly used by mobile radio
communications systems such as 800 MHz band cellular phone communications, 800
９
MHz band MCA land mobile radio communications, and local disaster contingency radio
communications systems. With regard to the 800 MHz band cellular phone
communications systems, in order to upgrade these from 2G to 3G systems to expand
the future use of the systems and at the same time secure the frequencies required for
mobile radio communications systems in the long and medium terms, MIC is
reorganizing the 800 MHz band towards 2012 in the light of the "Plan for IMT-2000
Frequency Arrangement in the 800 MHz Band" (released in February 2005) and the
development of deliberations on the efficient use of radio spectrum in the VHF/UHF band
in the Telecommunications Council, so that the frequencies in the 700 MHz/900 MHz
band may be promptly used for new purposes after the use of the frequency bands
allocated to terrestrial analog TV broadcasting services is discontinued.
In addition, the fiscal 2004 usage survey produced results indicating that it was
necessary to give consideration to measures to use frequencies more efficiently for
some radio spectrum usage systems, such as a narrowing of frequency bands or
frequency reallocation.
MIC must promote further frequency reorganization of the 800 MHz band in the light of
these assessments and other information in future.
(2) Policy on Basic Approach
a. 800 MHz-band FPU (770-806 MHz)
MIC plans to continue to allow land mobile stations (of type A) with specified radio
microphones to share half of the assigned frequency band (a bandwidth of 18 MHz
totaled from the 779-788 MHz band and the 797-806 MHz band) and consider
measures to use frequencies more efficiently, including a narrowing of frequency
bands, bearing in mind that the current number of radio stations in service is small.
b. Aircraft radiotelephony systems (830-832 MHz and 885-887 MHz)
As the Frequency Assignment Plan stipulates that these systems in the 831.5-832
MHz and 886.5-887 MHz bands and those in the 830-831.5 MHz and 885-886.5 MHz
bands must be reallocated to the 400 MHz band by September 30th, 2007 and by May
31st, 2010 respectively, information such as the change in the number of radio
stations for these systems must be watched carefully to ensure that frequency
reallocation and other items for these systems will be completed smoothly by the
specified dates.
c. Local disaster contingency radio communications systems (846-850 MHz and
901-903 MHz)
As the Frequency Assignment Plan stipulates that these systems must be
reallocated to the 260 MHz band by May 31st, 2011, information such as the change
in the number of radio stations for these systems must be watched carefully to ensure
that frequency reallocation and other items for these systems will be completed
１０
smoothly by the specified date.
d. 800 MHz-band MCA land mobile radio communications systems (836-838 MHz,
850-860 MHz, 891-893 MHz, and 905-915 MHz)
As the Frequency Assignment Plan stipulates that the allocation of the 836-838
MHz and 891-893 MHz frequency bands to these systems must be discontinued on
May 31st, 2007, information such as the change in the number of radio stations for
these systems must be watched carefully to ensure that the use of these frequency
bands is discontinued by the specified date.
In addition, MIC plans to consider the efficient use of frequencies in the 850-860
MHz and 905-915 MHz frequency bands in the light of the development of digitization,
etc. in conjunction with the frequency reorganization of the 800 MHz band.
e. Personal radio systems (903-905 MHz)
As MIC needs to look at implementing measures to use frequencies more efficiently
including the reallocation of frequencies to other radio spectrum usage systems
depending on information such as the change in the number of radio stations for these
systems, MIC has decided to give priority in this frequency band to discontinuing use
and plans to study the discontinuation date, etc. in the light of the information and
assessment results from the fiscal 2007 actual usage survey.
f. 950 MHz-band audio STL/TTL (958-960 MHz)
MIC plans to look at measures to replace these systems with alternatives such as
optical fiber or reallocating other frequency band(s) to these systems after considering
the status of use of these systems bearing in mind that the current number of radio
stations in service is small.
(3) Concrete Measures
a. 800 MHz-band FPU (770-806 MHz)
1) In a plan from this fiscal year to fiscal 2009, MIC intends to tackle the research and
development of effective technologies to make the use of frequencies more efficient.
2) In the light of the development of in 1) above and others, MIC intends to consider
measures to use the frequencies more efficiently, such as a narrowing of the
frequency band, and come out with a definite directive on the matter by fiscal 2009.
b. Aircraft radiotelephony systems (830-832 MHz and 885-887 MHz)
In order to ensure measures such as allocating other frequency band(s) to these
systems in the 831.5-832 MHz and 886.5-887 MHz frequency bands by September
30th, 2007 and the measures on the 830-831.5 MHz and 885-886.5 MHz frequency
bands by May 31st, 2010, MIC intends to check the number of the radio stations for
these systems biannually (every April and October) by using information recorded in
the Integrated Radio Stations Database and post the results on the MIC website.
１１
c. Local disaster contingency radio systems (846-850 MHz and 901-903 MHz)
In order to ensure the smooth completion of frequency reallocation, etc. by May 31st,
2011,MIC intends to check the number of radio stations for these systems biannually
(every April and October) by using information recorded in the Integrated Radio
Stations Database and post the results on the MIC website.
d. 800 MHz-band MCA land mobile radio communications systems (836-838 MHz,
850-860 MHz, 891-893 MHz, and 905-915 MHz)
1) In order to ensure that these systems will have stopped using the 836- 838 MHz and
891-893 MHz frequency bands by May 31st, 2007, MIC intends to check the number
of radio stations for these systems biannually (every April and October) by using
information recorded in the Integrated Radio Stations Database and post the results
on the MIC website.
2) MIC intends to give consideration to more efficient use of the frequencies in the
850-860 MHz and 905-915 MHz frequency band and come out with a definite
directive on the matter by fiscal 2007 in the light of information such as the progress
of digitization and the development of deliberations on the efficient use of radio
spectrum in the VHF/UHF band in the Telecommunications Council (who received
the consultation request on March, 2006 and plan to report on it by about June,
2007).
e. Personal radio systems (903-905 MHz)
1) In order to keep track of the change in the number of radio stations, MIC intends to
check it biannually (every April and October) by using information recorded in the
Integrated Radio Stations Database and post the results on the MIC website.
2) From the viewpoint of the efficient use of frequencies, MIC intends to study the
abolishment date, etc. for these systems with attention to the trend in demand for
radio equipment and assess in detail measures to use frequencies more efficiently
for these systems in the fiscal 2007 actual usage survey.
3) In the light of the results from items 1) and 2) above, MIC intends to consider the
abolishment date, etc. and draw a conclusion on the matter towards fiscal 2008.
f. 950 MHz-band audio STL/TTL (958-960 MHz)
Bearing in mind the situation where some lines are difficult to replace with
alternatives such as optical fiber and also difficult to reallocate to a higher frequency
band in the microwave band, etc., MIC intends to consider measures including
replacing these systems with alternatives such as optical fiber or reallocating other
frequency bands to these systems and will draw a conclusion on the matter within this
fiscal year.
VI. 1.4-1.71 GHz Band
１２
(1) Current Status and Considerations
The 1.4-1.71 GHz frequency band is now mainly used by mobile radio
communications systems such as 1.5 GHz-band cellular phone communications and 1.5
GHz-band MCA land mobile radio communications systems. MIC is converting 1.5
GHz-band MCA land mobile radio communications systems from analog transmission to
digital transmission and reducing the allotted frequency bandwidth from the viewpoint of
efficient use of the frequencies.
With regard to the 1.5 GHz-band cellular phone communications systems, the fiscal
2004 actual usage survey produced evaluation results indicating that it was appropriate
not only to study upgrading these systems from 2G to the 3G system in the long and
medium terms, but also to consider flexible measures in future for the efficient use of free
frequencies in the regions with special attention to, but not limited to the trend in demand
for these systems and the regional characteristics because part of the frequency band
used by these systems are free in some regions outside metropolitan areas with a
comparatively low demand for these systems.
MIC must promote the reorganization of frequencies in the 1.5 GHz band in the light of
these assessments and other information in the future.
(2) Policy on Basic Approach
a. 1.5 GHz-band MCA land mobile radio communications systems (1.453-1.465 GHz,
1.468-1.477 GHz, 1.501-1.513 GHz, and 1.516-1.525 GHz)
As the Frequency Assignment Plan stipulates that the allocation of the 1.468-1.477
GHz and 1.516-1.525 GHz frequency bands to these systems will be discontinued*2
on September 30th, 2007*1, information such as the change in the number of radio
stations for these systems must be carefully watched to ensure that the use of these
frequency bands is discontinued by the set date.
*1: As a result of reviewing the schedule for the conversion from analog to digital transmission and
others in response to information such as the evaluation results of the fiscal 2004 actual usage survey,
MIC was able to determine that it would be feasible to conduct the conversion earlier. For this reason,
MIC already moved up the validity date of the frequency bands from May 31st, 2009 to September 30th,
2007 in the Frequency Assignment Plan revised on August 11th, 2005.
*2: MIC already reduced the 1.465-1.468 GHz and 1.513-1.516 GHz bands on May 31st, 2005.
In addition, MIC plans to conduct comprehensive deliberations on measures to use
free frequencies efficiently created by the reduction of the frequency bands based on,
but not limited to, the progress of digitization, upgrading the 1.5 GHz-band cellular
phone communications systems to 3rd generation systems, and measures to use free
frequencies efficiently in regions outside urban areas.
１３
b. 1.5 GHz-band cellular phone communications systems (1.429-1.453 GHz,
1.465-1.468 GHz, 1.477-1.501 GHz, and 1.513-1.516 GHz)
MIC will consider not only upgrading these systems from 2G to 3G systems in the
long and medium terms, but also measures to use free frequencies efficiently in
regions with special attention to, but not limited to, the trend in demand for these
systems and regional characteristics because some of the frequency bands that these
systems are using are free in some regions outside metropolitan and urban areas.
Note that MIC will investigate these considerations in a comprehensive manner
based on, but not limited to, measures for the efficient use of free frequencies created
through the reduction of the frequency bands that are being used by the 1.5 GHz-band
MCA land mobile radio communications systems.
(3) Concrete Measures
a. 1.5 GHz-band MCA land mobile radio communications systems (1.453-1.465 GHz,
1.468-1.477 GHz, 1.501-1.513 GHz, and 1.516-1.525 GHz)
1) In order to ensure that these systems will have stopped using the 1.468-1.477 GHz
and 1.516-1.525 GHz bands by September 30th, 2007, MIC intends to check the
number of radio stations for these systems biannually (every April and October) by
using information recorded in the Integrated Radio Stations Database and post the
results on the MIC website.
2) MIC intends to conduct comprehensive deliberations on measures to use free
frequencies efficiently created in the light of information such as the progress of
digitization and the development of deliberations on the frequency reorganization in
the 1.5 GHz band in the Telecommunications Council (who received the
consultation request on February, 2006 and plan to report on it within 2006) and
come out with a definite directive on the matter within fiscal 2007.
b. 1.5 GHz-band cellular phone communication systems (1.429-1.453 GHz,
1.465-1.468 GHz, 1.477-1.501 GHz, and 1.513-1.516 GHz)
MIC intends to conduct comprehensive deliberations on upgrading these systems
from 2G to 3G systems and measures to use free frequencies efficiently in regions
outside metropolitan and urban areas in the light of information such as the
development of deliberations on the frequency reorganization in the 1.5 GHz band in
the Telecommunications Council (who received the consultation request on February,
2006 and plan to report on it within 2006) and come out with a definite directive on the
matter within this fiscal year.
VII. 3.4-3.6 GHz Band
１４
(1) Current Status and Considerations
The frequency band of 3.4-3.6 GHz is now used for video and audio STL/TTL/TSL,
audio FPU, and others. As the frequency band is appropriate for use with mobile radio
communications systems such as 4G mobile radio communications systems, the actual
usage survey in fiscal 2003 produced evaluation results indicating that it is appropriate to
give prompt consideration to said video systems as to whether or not radio stations that
will be left after the terrestrial analog broadcasting services have been terminated (in
2011) will be replaced with optical fiber and said video systems will be reallocated other
frequency band(s), and to give consideration to said audio systems as to whether or not
said audio systems can be reallocated other frequency band(s) and others.
When frequencies are allocated to mobile radio communications systems such as 4G
mobile radio communications systems in future, MIC must consider it with an eye on the
following facts.
1) ITU (International Telecommunication Union) engages in the standardization of 4G
mobile radio communications systems with the aim of completing it around 2010.
2) Attention must be paid to sharing with fixed-satellite services.
(2) Policy on Basic Approach
a. Video STL/TTL/TSL (3.456-3.6 GHz)
Since radio stations for video STL/TTL using analog transmission will be abolished
when terrestrial analog TV broadcasting services have been discontinued in 2011,
MIC basically reserves this frequency band for mobile radio communications such as
4G radio communication systems.
In the process of digitizing existing analog video TSL and terrestrial TV broadcasting
services, however, full consideration must be given to the reallocation of frequencies
used by any digital video TSL that will be opened on a temporary basis on said
frequency band and others.
b. Audio STL/TTL/TSL etc. (3.4-3.456 GHz)
Since audio STL/TTL/TSL, etc. continue to be used in future, the possibility of
securing frequencies that will be reallocated to them and replacing them with
alternatives such as optical fiber must be fully considered before determining whether
the reallocation is feasible.
c. Consideration on sharing the band with mobile communications and satellite
communications
Since this frequency band is also used with downlinks for fixed-satellite services, full
consideration must be given to sharing the band with mobile and satellite
communications.
(3) Concrete Measures
１５
a. Video STL/TTL/TSL (3.456-3.6 GHz)
1) Based on the assumption of reallocating other frequency band(s) to video TSL
towards the end of November 2012, MIC intends to consider how to establish the
reallocation measures and period and draw a conclusion on the matter in this fiscal
year.
2) In item 1) above, MIC intends not only to consider other microwave bands that have
been allocated to broadcasting operations as the first candidate for the destination
frequency band, but also to study other proposed frequency bands when the
necessity arises.
3) From fiscal 2005 to this fiscal year, MIC intends to conduct technical examinations
by using broadcast waves on the UHF band to develop the technical standards for
digital video STL/TTL and to come out with a definite directive on the standards in
the light of the examination results in this fiscal year.
b. Audio STL/TTL/TSL, etc. (3.4-3.456 GHz)
1) Based on the assumption of reallocating other frequency band(s) to audio
STL/TTL/TSL and monitor and control lines, MIC intends to conduct technical
examinations to develop the technical standards in a destination frequency band(s)
in this fiscal year, and to consider reallocation measures for these systems, etc. to
come out with a definite directive on them in the light of the examination results in
this fiscal year.
2) Based on the assumption of reallocating other frequency band(s) to audio FPU, MIC
intends to consider the reallocation measures for said FPU, etc. to come out with a
definite directive on them within fiscal 2007.
3) In items 1) and 2) above, MIC intends not only to consider other microwave bands
that have been allocated to broadcasting operations as the first candidate for the
destination frequency band, but also to study other proposed frequency bands when
the necessity arises.
c. Consideration on sharing the band with mobile communications and satellite
communications
1) In a plan from this fiscal year to fiscal 2007, MIC intends to tackle the research and
development related to technologies such as sharing frequencies with satellite
communications and other communications.
2) In a plan from this fiscal year to fiscal 2009, MIC intends to carry out technical
examinations related to sophisticated frequency-sharing technologies between 4G
mobile radio communications systems and satellite communications systems, etc.
3) In the light of results derived from items 1) and 2) above, MIC intends to study
concrete sharing methods and draw a conclusion on the matter by fiscal 2009.
１６
VIII. 3.6-4.2 GHz Band and 4.4-5.0 GHz Band
(1) Current Status and Considerations
The 3.6-4.2 GHz frequency band is now used for fixed wireless commercial
telecommunication systems and downlinks for fixed-satellites and the 4.4-5.0 GHz
frequency band is used for fixed wireless commercial telecommunications systems, etc.
As these frequency bands are appropriate for use with mobile radio communications
systems such as 4G mobile radio communications systems and high-power wireless
access systems, the actual usage survey in fiscal 2003 produced evaluation results
indicating that it is appropriate to allocate required frequencies to these system in step
with an estimated increase in demand for them.
When frequencies are allocated to mobile radio communications systems such as 4G
mobile radio communications systems in the future, MIC must consider it with an eye on
the following facts.
1) ITU engages in the standardization of 4G mobile radio communications systems
with the aim of completing it around 2010.
2) Attention must be paid to sharing the allotments with fixed-satellite services (3.6-4.2
GHz band).
3) It is appropriate to ensure that the replacement of fixed wireless commercial
telecommunications systems and the reallocation of used frequencies will also be
completed before the valid period for frequency usage has expired within the
jurisdiction of the Telecommunications Bureaus in other regions than the Kanto,
Tokai, and Kinki areas so that the 4.9-5.0 GHz band may be used exclusively for
high-power wireless access systems on a national basis.
4) As next-generation intelligent home appliances (using digital TV transmission, etc.)
heighten the need for the use of radio spectrum, required frequency bandwidths
should be secured in the neighborhood of the 5 GHz band.
(2) Policy on Basic Approach
a. Consideration on sharing the band with mobile communications and satellite
communications
Since the 3.6-4.2 GHz frequency band is also used with downlinks for fixed-satellite
services, full consideration must be given to sharing the band with mobile and satellite
communications.
b. Fixed wireless commercial telecommunication systems within the jurisdiction of
the Telecommunications Bureaus in other regions than the Kanto, Tokai, and Kinki
areas (4.9-5.0 GHz)
１７
In response to demand for high-power wireless access systems within the
jurisdiction of the Telecommunications Bureaus in the Kanto, Tokai, and Kinki areas,
the fixed wireless commercial telecommunications systems that used this frequency
band had been reallocated other frequency band(s) and replaced with wired systems
by November 30th, 2005. On the other hand, as the Frequency Assignment Plan
stipulates that the service also must stop using the frequency band on November 30th,
2007 within the jurisdiction of other Telecommunications Bureaus, the change in the
number of radio stations for said service, etc. must be carefully watched to ensure that
the use of the band will be discontinued by the set date.
c. Consideration on the use of radio spectrum by next-generation intelligent home
appliances
MIC must understand how many next-generation intelligent home appliances need
to use radio spectrum and consider the technical standards in conjunction with
securing required frequency widths in the neighborhood of the 5 GHz band.
(3) Concrete Measures
a. Consideration on sharing the band with mobile communications and satellite
communications
1) In a plan from this fiscal year to fiscal 2007, MIC intends to address research and
development related to technologies such as sharing the frequencies with satellite
communications and other communications.
2) In a plan from this fiscal year to fiscal 2009, MIC intends to carry out technical
examinations related to sophisticated frequency-sharing technologies between 4G
mobile radio communications systems and satellite communication systems, etc.
3) In the light of results derived from items 1) and 2) above, MIC intends to study
concrete sharing methods and draw a conclusion on the matter by fiscal 2009.
b. Fixed wireless commercial telecommunications systems within the jurisdiction of
the Telecommunications Bureaus in regions other than the Kanto, Tokai, and Kinki
areas (4.9-5.0 GHz)
In order to ensure that these systems will have stopped using the band by
November 30th, 2007 within the jurisdiction of the Telecommunications Bureaus in
regions other than the Kanto, Tokai, and Kinki areas, MIC intends to check the number
of radio stations for these systems biannually (every April and October) by using
information recorded in the Integrated Radio Stations Database and post the results
on the MIC website.
c. Consideration on the use of radio spectrum by next-generation intelligent home
appliances
１８
1) With regard to the use of radio spectrum by next-generation intelligent home
appliances, the Study Group for Wireless Broadband Promotion has presented a
view on the direction of usage that the appliances must be connected through a
wireless LAN and share frequencies in the 5 GHz band with other systems.
2) In response to the opinion described in item 1), MIC intends to streamline the
relevant laws and regulations by fiscal 2007 in the light of information such as
results derived from the deliberation on the technical conditions in the
Telecommunications Council (who received the consultation request from them in
March 2006 and is expected to report on them within this fiscal year) in order to
deploy 5 GHz-band high-speed wireless LANs that provide a transmission speed of
100Mbps or more.
3) As it is expected that the diffusion status of next-generation intelligent home
appliances, the direction of the international use of radio spectrum, the trends in
technology development, etc. will be made clear around 2008, MIC intends to
review the introduced frequency band(s) and required frequency widths as the
necessity arises.
IX. 5.25-5.85 GHz Band
(1) Current Status and Considerations
The 5.25-5.85 GHz band is now being used by systems with high public usage such as
marine
radar
and
meteorological
radar
systems.
As
the
2003
World
Radiocommunication Conference (WRC-03) decided to make additional allotments to
wireless access systems including wireless LAN systems on a global basis from a part of
this frequency band, MIC thinks it appropriate to make the wireless access systems
share the required frequencies with, but not limited to, the radars in response to an
estimated increase in demand for these systems in the future.
It is also necessary to consider narrowing the frequency band currently used by
meteorological radar systems and utilizing a higher frequency band for those with a
comparatively narrow observation range in order to use this frequency band effectively.
The fiscal 2003 actual usage survey produced evaluation results indicating that it was
appropriate to consider the sharing and reallocation of the frequency band within five
years from now depending on the trend in demand for wireless access systems as to
when to introduce the relevant technologies such as a narrowing of the band.
(2) Policy on Basic Approach
a. Expanding the bandwidth of 5 GHz-band wireless access systems
１９
As to the 5.25-5.35 GHz and 5.47-5.725 GHz bands that were newly allocated to
wireless access systems including wireless LAN systems on a global basis in WRC-03,
MIC already streamlined the relevant laws and regulations and mechanisms to deploy
wireless LAN systems in the 5.25-5.35 GHz band in May 2005 and plans not only to
develop the technical standards to make wireless LAN systems available but also to
change the frequency assignment plan for the 5.47-5.725 GHz band as early as
possible.
b. Actions such as narrowing the band for meteorological radar systems
Although 5 GHz-band meteorological radar systems have a small number of radio
stations, they have trouble repetitively using frequencies because of a wide
observation range. For this reason, MIC plans not only to study the introduction of
technologies such as a frequency narrowing technology, but also to consider using
higher frequencies for the radio stations with a narrow observation range in the future.
Then, MIC intends to pay attention to the trend in demand for wireless access
systems.
(3) Concrete Measures
a. Expanding the bandwidth of 5 GHz-band wireless access systems
Based on the fact that the international measurement standards for sharing
frequencies with radars have been established in the 5.47-5.725 GHz band, MIC
intends to develop the technical standards and streamline the relevant provisions
towards deploying wireless LAN systems within this fiscal year.
b. Actions such as narrowing the band for meteorological radar systems
On the assumption that the frequency band will be shifted from the 5.25-5.35 GHz
band to the 5.33-5.37 GHz band in conjunction with the introduction of a frequency
narrowing technology, MIC intends to consider measures for the early deployment of a
narrowing technology to further facilitate the frequency shift within fiscal 2008 based
on, but not limited to, the results of research and development activities related to the
narrowing bandwidth technologies for radars, which activities are being conducted in a
plan from fiscal 2005 to fiscal 2007.
X. 13.25-15.4 GHz Band
(1) Current Status and Considerations
The fiscal 2003 actual usage survey produced evaluation results indicating the usage
of the 13.25-15.4 GHz frequency band as follows: As all the radio stations for 15
GHz-band HELI-TV systems (Picture Transmission) adopted analog transmission, it
２０
was appropriate to consider a reduction in the bandwidth and the more efficient use of
the frequencies by converting to digital transmission, to attempt to deploy digital
transmission within five years, and accordingly consider the time when the current
analog transmission should be discontinued.
(2) Policy on Basic Approach
As the licensees must bear the cost of system updates when actually deploying digital
transmission, MIC plans to estimate the cost and consider the time when the current
transmission mode should be switched to digital transmission and when analog
transmission should be discontinued while paying attention to the opinions of
stakeholders.
(3) Concrete Measures
In the light of the results produced by the hearing process and survey conducted on all
licensees of these systems in fiscal 2005 indicating that it was desirable to deploy digital
transmission for these systems by fiscal 2008 and abolish analog transmission in the
future, MIC intends to consider the discontinuation date for analog transmission and
draw a conclusion on the matter within this fiscal year.
XI. 15.4-21.2 GHz Band
(1) Current Status and Considerations
The fiscal 2003 actual usage survey produced evaluation results indicating the usage
of the 15.4-21.2 GHz frequency band as follows: Based on the fact that the 19 GHz-band
premises radio systems had very slight usage and systems such as 2.4 GHz-band and 5
GHz-band wireless LAN systems were deployed in the frequency band, as it was very
unlikely that the usage of said premises radio systems would increase in the years to
come, it was appropriate to consider abolishing these systems in the future with attention
to the periods of validity of licenses for existing radio stations on the assumption that
when attempting to expand the usage of systems such as 18 GHz-band wireless access
systems that shared frequencies with these systems, the expansion would contribute to
the efficient use of this frequency band.
(2) Policy on Basic Approach
MIC plans to consider discontinuing 19 GHz-band premises radio systems. Then, as
there are still existing users although these systems only have a very few radio stations,
MIC will pay ample attention to the wishes of the users.
(3) Concrete Measures
２１
In the light of the fact that the fiscal 2005 actual usage survey conducted on 19
GHz-band premise radio systems produced evaluation results indicating that it was
appropriate to discontinue these systems with an eye on the date of validity of existing
licenses, MIC intends to monitor the change in the number of radio stations biannually
(every April and October) in order to keep track of them by using information recorded in
the Integrated Radio Stations Database and post the results on the MIC website.
XII. Above 30 GHz
(1) Current Status and Considerations
The fiscal 2003 actual usage survey produced evaluation results indicating that about
6,200 or slightly more radio stations in total were using the frequency band of 30 GHz or
higher (untapped frequency bands) and that usage of the band was much lower than for
other frequency bands.
This is due to problems such as the tendency for developed equipment to become
expensive because of the scarce use of the radio spectrum and the difficulty in
developing transmitters/receivers and especially technologies such as infrastructure
technologies that reduce transmission loss, interference, etc. and radio device
technologies such as millimeter-wave integrated circuits (MMIC) because of the higher
frequencies. In addition, since the frequency band can secure wide frequency
bandwidths as one of its features, it is suitable for high-volume transmission. On the
other hand, since it has marked characteristics that include straight-line transmission
and a short transmission distance due to the large attenuation caused by air, rainfall,
etc., its applications are limited. These seem to be some factors in the scarce usage of
the frequency band.
However, MIC must not only assist in the development of the infrastructure
technologies that allow for, not limited to the physical features described above, but also
promote the development of new radio spectrum usage systems in order to facilitate the
use of untapped frequency bands including this frequency band, because it can be
expected that overcoming these problems and promoting the use of untapped frequency
bands will contribute to resolving or reducing the tightness of frequencies.
Note the following fact concerning the development of untapped frequency bands:
The Committees for Internal Affairs and Communications in both Houses of the Diet
during the 159th Diet Session in 2004 deliberated on amendments to the Radio Law and
passed an additional resolution to the effect that efforts must be made to continue to
tackle technology development such as tapping unused frequency bands to resolve the
tightness of radio spectrum.
２２
(2) Policy on Basic Approach
From the following perspectives, MIC plans to promote measures to facilitate the
effective use of untapped frequency bands in which radio spectrum is not much used:
a. Assignment untapped frequency bands to systems that use new radio spectrum
As the frequency band is a high-frequency band of 30 GHz or higher and is not
much used from the viewpoint of radio spectrum, a broad bandwidth of frequencies
can be allocated to systems. For example, the segment is good for allotment to
systems that use new radio spectrum such as high-definition video transmission or
high-volume data transmission systems that are equivalent to optical fiber, etc. In the
light of this fact, MIC plans to promote the use of the untapped frequency bands as
candidates for allotment to systems that use new radio spectrum.
b. Using an untapped frequency band as a destination to which existing radio
stations involved in the reallocation of frequencies will be shifted
For example, the 3-6 GHz frequency band (hereinafter called “lower microwave
band”) is very suitable for mobile radio communications systems and wireless access
systems, including wireless LAN systems, for which a future increase in demand is
expected. For this reason, MIC plans to reallocate the lower microwave band to
mobile radio communications and wireless access systems by moving them to an
untapped frequency band by methods such as developing technologies that utilize
untapped frequency bands and at the same time gradually shifting the frequencies to
a higher level, and using the frequencies for systems such as fixed wireless systems
that are using the lower microwave band.
(3) Concrete Measures
a. Research and development to facilitate the efficient use of untapped frequency
bands
In a plan from fiscal 2005 to fiscal 2009, MIC intends to tackle research and
development activities for infrastructure technologies, including, but not limited to,
elemental technologies for reducing transmission loss, interference, etc. and radio
device technologies such as millimeter-wave integrated circuits (MMIC), that are
intended to facilitate the use of the untapped frequency bands.
b. Deployment of ultra high-speed wireless LANs
Wireless LAN systems are now being used in homes and public spaces such as
offices, lobbies in hotels, and airports. MIC intends to address research and
development activities into Gigabit-class wireless LAN systems that use millimeter
waves, etc. from fiscal 2004 to fiscal 2008 in order to enable them to transmit large
volumes of data such as high-definition video and high-quality voice data at higher
speeds and aims to make them commercially available around fiscal 2010.
２３
c. Deployment of millimeter wave band material transmission systems (such as
wireless cameras)
As the launch of terrestrial digital broadcasting services and others are expected to
increase the demand for HDTV, the demand for program material systems is being
heightened, such as HDTV wireless cameras that are used in, but not limited to,
outdoor events such as sports telecasts and events within studio halls. For this reason,
MIC intends to conduct technical examinations related to the development of technical
standards for millimeter-wave material transmission systems on HDTV program
material transmission systems that use the 60 GHz band on which a broad bandwidth
can be secured within this fiscal year and aim to make them commercially available
around fiscal 2007.
d. Deployment of millimeter-wave band onboard radar systems with high resolution
The current millimeter-wave onboard radar systems can distinguish objects of the
size of a regular car. Radar systems, however, are required to have more
sophisticated functions from the viewpoint of safety and security in the future and
consequently the demand for new radar systems with higher resolution are heightened
to isolate and detect smaller objects such as pedestrians on a street. In addition, the
Study Group for the Promotion of Wireless Broadband deliberated on these radar
systems as proposed next-generation ITS systems and proposed that it was
appropriate to allocate a frequency width of about 3 GHz around the 79 GHz band to
them to further enhance them with attention given to, but not limited to, trends in
international standardization. For this reason, MIC intends to consider the deployment
of new onboard radar systems with higher resolution that use the 79 GHz band and
aim to make them commercially available around fiscal 2011.
２４
(Reference 1)
Overview of Basic Approaches to Measures to Use Frequencies More Efficiently
(Summary of Chapter 5 of Interim Report Compiled by the Study Group for the Promotion of
Wireless Broadband (Released on April 14, 2005))
(1) Measures to use frequencies more efficiently in fixed wireless systems
With regard to measures to use the frequencies that fixed wireless systems are using
more efficiently, one approach is to create free frequencies in this frequency band and
allocate as many of the frequencies as possible to new radio spectrum usage systems,
and another is to share the frequency band with them. Specifically, the following
methods would be suggested:
1) Replacing the fixed wireless systems with wired systems such as optical fiber
2) Reallocating other frequency band to the systems
3) Reviewing the existing, allotted frequency bandwidth(s)
4) Leveraging technologies to use frequencies efficiently (such as frequency narrowing
technologies, underlaying technologies, and inter-system carrier sensing technologies).
(2) Measures to use frequencies more efficiently in radiolocation systems
With regard to measures to use the frequencies that radiolocation systems are using
more efficiently, one approach is to create free frequencies in this frequency band and
allocate as many of the frequencies as possible to new radio spectrum usage systems,
and another is to share the frequency band with them. Specifically, the following
methods would be suggested:
1) Reallocating another frequency band to radiolocation systems
2) Reviewing the existing, allotted frequency bandwidth(s)
3) Leveraging technologies to use frequencies efficiently (such as frequency narrowing
technologies, spurious reduction technologies, and inter-system carrier sensing
technologies).
(3) Measures to use frequencies more efficiently in satellite radio communications
systems
With regard to measures to use the frequencies that satellite radio communications
systems are using more efficiently, one approach is to create free frequencies in this
frequency band and allocate as many of the frequencies as possible to new radio
spectrum usage systems, and another is to share the frequency band with them.
Specifically, the following methods would be suggested:
２５
1) Replacing the satellite radio communications systems with wired systems such as
optical fiber
2) Reallocating another frequency band to the systems
3) Reviewing the existing, allotted frequency bandwidth(s)
4) Sharing frequencies among the systems by dividing up the frequency assignment by
region
5) Leveraging technologies for using frequencies efficiently (such as technologies for
reducing the effects of interference waves and underlaying technologies).
The following table summarizes measures for using frequencies more efficiently in each
of the three types of systems described above:
２６
Table: Summary of measures for using frequencies applicable to systems using the radio
spectrum more efficiently
Name of System Using
the Radio Spectrum
Measures for
Using Frequencies More Efficiently
1)
Replacing this system with a wired system
such as optical fiber
2)
Reallocating another frequency band to this
system
3)
Reviewing the existing, allotted frequency
bandwidth(s)
4)
Inter-system frequency sharing by dividing
up the frequency allotment by region
5)
Leveraging technologies to use the
frequencies more efficiently
Fixed Wireless
Systems
Radiolocation Systems
Satellite Radio
Communications
Systems

–








–


(e.g.)
- Narrowing
- Underlay
- Inter-system carrier
sensing

(e.g.)
- Narrowing
- Spurious reduction
- Inter-system carrier
sensing

(e.g.)
- Reducing effects
from interference
waves
- Underlay
When considering whether or not it is possible to apply one of the measures to use the
frequencies listed in the table more efficiently, for example, if you were to replace your
system with a wired system, it would be necessary to fully investigate other elements
such as how the existing optical fiber lines were laid in the relevant places and the cost of
using optical fiber, not simply because it appears feasible to do so.
In order to consider measures to use the frequencies for a system using a specific
radio spectrum more efficiently in reality, we must also pay attention to other things. For
example, one system using the radio spectrum consists of many radio stations and it may
not be appropriate to uniformly apply the same measure to all of them. Consequently, we
must bear in mind the following four considerations when specifically studying each of the
radio stations on an individual basis:
1) A full feasibility study is required before implementing any of the measures to use the
frequencies more efficiently.
2) Each the measures to use frequencies more efficiently must be reviewed for each of
the radio stations to which that measure will be applied.
3) The gradual implementation of measures to use frequencies more efficiently by region
must be considered.
4) Guidelines that give an objective assessment of the selected measure must be
reviewed.
Note that the considerations described above shall apply to, but shall not be limited to,
the specific fixed wireless systems, radiolocation systems, and satellite radio
communications systems that require a more efficient use of frequencies in the Action
Plan for Spectrum Reallocation.
２７
(Reference 2)
Chapter 5 "Summary" Excerpted from the Summary of Results of the Fiscal 2003
Survey and Assessment on Actual Radio Spectrum Usage (Released on March 17th,
2004)
Chapter 5: Summary
The fiscal 2003 survey on actual radio spectrum usage on the frequencies above 3.4 GHz
conducted an assessment of usage on 27 frequency bands by band (in Chapter 4) based on
the results of assessing their usage by systems using the radio spectrum (in Chapter 3), and
drew the conclusion that all of the 27 frequency bands were generally being used properly.
However, the survey revealed that some systems that use parts of a frequency band of the
radio spectrum could be replaced with wired systems, such as optical fiber or other systems,
in other frequency bands and the introduction of technologies that use the frequencies more
efficiently such as digitization and a narrowing of frequencies should be put under
consideration.
Chapter 5 describes the following seven frequency bands that should receive special
attention as items that MIC will give priority to in the future in the light of the results of this
actual usage survey.
(1) 3.4-3.6 GHz Band
SInce this frequency band is suitable to be allocated to mobile radio communications
systems such as 4G mobile radio communication systems, the Study Group thinks it
appropriate to allocate the required frequencies to these systems in response to an
estimated increase in demand for these systems in the future.
Among the systems using this frequency band, since fixed service systems could be
replaced with optical fiber or be reallocated to other frequency band(s) and especially
since many of the radio stations (lines) using this frequency band for video STL/TTL/TSL
(A band) systems will be abolished when terrestrial analog broadcasting services are
terminated in 2011, it is appropriate to give prompt consideration to these video systems
in light of whether or not the radio stations that will be left should be replaced with optical
fiber and whether these video systems will be reallocated to other frequency band(s).
Whether or not 3.4 GHz-band audio STL/TTL/TSL systems and broadcasting
monitoring control systems could be replaced with wired systems or reallocated to other
frequency band(s) should also be considered.
In addition, whether or not 3.4 GHz audio FPU systems could be replaced with other
systems on other possible frequency bands should be considered.
It is appropriate to roughly schedule the replacement or reallocation of the systems
２８
described above for about 2011 when terrestrial analog broadcasting services are
discontinued.
Note that it is necessary to pay attention to sharing this frequency band with fixed
satellite services, which are currently using it.
２９
(2) 3.6-4.2 GHz Band
Since this frequency band is suitable to be allocated to mobile radio communications
systems such as 4G mobile radio communication systems, the Study Group thinks it
appropriate to allocate the required frequencies to these systems in response to an
estimated increase in demand for these systems in the future.
Among the systems using this frequency band, since fixed wireless commercial
telecommunications systems could be replaced with optical fiber or be reallocated to
other frequency band(s), it is appropriate to complete the replacement or frequency
reallocation process by November 30th, 2012 as described in the frequency assignment
plan.
Note that it is necessary to pay attention to sharing this frequency band with fixed
satellite services, which are currently using it.
(3) 4.4-5.0 GHz Band
Since this frequency band is suitable to be allocated to mobile radio communications
systems such as 4G mobile radio communications systems and wireless access
systems including wireless LAN systems, the Study Group thinks it appropriate to
allocate the required frequencies to these systems in response to an estimated increase
in demand for these systems in the future.
Since the need to allocate frequencies to so-called intelligent home appliances that
prime AV related home appliances such as digital TV sets and DVD players/recorders
and other white goods that are cordless is heightened in this frequency band,
frequencies should be secured so that a dedicated band with a minimum of
approximately 30 MHz (equivalent of the transmission capacity for two high vision
channels) may be set up in the neighborhood of 5 GHz in this band.
The current frequency assignment plan states that the fixed wireless commercial
telecommunications systems that are using the 4.9-5.0 GHz sub-band in this frequency
band are allowed to use these frequencies by November 30th, 2007. The "Outline of
Assessment of the Degree of Effective Use of the Radio Spectrum Relating to Fixed
Stations for Commercial Telecommunications Services Using the 4 GHz, 5 GHz and 6
GHz Bands Based on the Results of Fiscal 2002 Survey and Assessment of Actual
Radio Spectrum Usage (prior survey)" already published on May 14th, 2003
recommended that, since the required measures are possible, prompt consideration be
given to these fixed wireless commercial telecommunications systems and to replacing
them with optical fiber or other systems in other frequency bands. The Study Group
thinks it appropriate to move up the date in the light of this report.
Note that it is appropriate to allocate frequencies to mobile radio communications
systems by November 30th, 2012, which is specified in the frequency assignment plan
as the expiration date after which fixed wireless commercial telecommunications
systems can no longer use those frequencies. To allow wireless access systems
３０
including wireless LAN systems allocated to the 4.9-5.0 GHz sub-band to have this
sub-band to themselves only in the three major metropolitan areas by about 2005, it is
also advisable to replace fixed wireless systems with other systems or reallocate them to
other frequency band(s).
(4) 5.25-5.85 GHz Band
This frequency band is now being used by systems with high public use such as
marine and aircraft radars. As WRC-03 decided to make additional allotments to wireless
access systems including wireless LAN systems on a global basis from a part of this
frequency band, it is appropriate to allocate the required frequencies to wireless access
systems from the additionally allotted frequency band in response to an estimated
increase in demand for these systems.
Among the systems that are using this frequency band, although 5 GHz-band
meteorological radar and 5 GHz-band airport meteorological radar systems have a small
number of radio stations, they have trouble repetitively using frequencies because of
their wide observation range. For this reason, it is advisable to study how to use the
frequencies more efficiently by introducing technologies such as narrowing the frequency
bands and considering the use of a higher frequency band for radio stations with a
comparatively narrow observation range in future.
Note that when introducing the relevant technologies such as narrowing the band, it is
advisable to consider sharing and reallocating the frequency band within five years from
now depending on the trend in the demand for wireless access systems, including
wireless LAN systems. It is also appropriate to encourage ITS-related systems that use
this frequency band of the radio spectrum to continue to use it because they are
expected to continue to diffuse in the future.
(5) 13.25-15.4 GHz Band
Among the systems that are using this frequency band, all radio stations for 15
GHz-band HELI-TV system (Picture Transmission) adopt analog transmission. For this
reason, it is advisable to consider reducing the bandwidth and using the frequencies
more efficiently by converting to digital transmission, to attempt to deploy digital
transmission within five years, and accordingly to consider the time when the current
analog transmission can be discontinued.
(6) 15.4-21.2 GHz Band
Among the systems that are using this frequency band, 19 GHz-band premises radio
systems have very few stations, a mere dozen stations, and their usage is very unlikely
to increase in the future because 2.4 GHz-band and 5 GHz-band wireless LAN systems,
etc. have been deployed. It is advisable to consider abolishing these systems because
３１
the efficiency of use of this frequency band can be improved in the future by extending
the usage of 18 GHz-band wireless access systems, etc.
(7) 59-66 GHz Band
It is advisable to continue to promote the use of this frequency band as a frequency
band on which broad bandwidths are available.
３２
(Reference 3)
Chapter 5 "Summary" Excerpted from the Summary of Results of the Fiscal 2004
Survey and Assessment on Actual Radio Spectrum Usage (Released on April 13th,
2005)
Chapter 5: Summary
The Fiscal 2004 Survey on Actual Radio Spectrum Usage conducted an assessment on
each of seven frequency segments into which the 770 MHz-3.4 GHz frequency band was
divided. As each frequency band had different use conditions, such as a certain segment
being allocated to an international aeronautical radio navigation service, it was not necessarily
easy to compare the usage status in one band to that in another band. As a result of the
assessment, however, the Study Group drew the conclusion that all of the seven frequency
bands were generally used properly as a whole.
When the Study Group focused on the radio spectrum usage systems in the Survey,
however, it found that some radio spectrum usage systems in frequency bands that had a
very small number of radio stations compared with the frequency bandwidth assigned to them,
could be replaced by wired systems such as optical fiber or could be reallocated to other
frequency band(s) and the introduction of technologies for the efficient use of frequencies
should be considered, including narrowing the frequency bands.
As it is possible to deploy other systems by using free bandwidth in a frequency band that is
currently assigned to national systems in the light of possible future trends in demand for the
current national systems, the nature of each region, etc. in regions such as mountainous
areas that have comparatively low frequency demands, flexible consideration should be given
to measures to use frequencies more efficiently in these regions.
This chapter summarizes the items that are regarded as requiring future consideration in
each frequency band and at the same time looks at the distribution of radio stations over the
entire 770 MHz to 3.4 GHz frequency band based on this actual usage survey.
(1) Frequency band from 770 MHz to 960 MHz
1) Video FPU systems in the 800 MHz band share a half (a width of 18 MHz) of the
assignment frequency width (a width of 36 MHz) with land mobile stations (A type) with
specified radio microphones and are allocated to the other half or 18 MHz exclusively.
These systems are required when creating broadcast programs such as emergency
press reports and have as few as 163 radio stations now in service on a national basis.
For this reason, it is necessary to consider measures to use these frequencies more
efficiently, including narrowing the bandwidths.
2) As the Frequency Assignment Plan stipulates that aircraft radiotelephony and local
３３
disaster contingency radio communications systems must be reallocated to the 400
MHz band by May 31st, 2010 and to the 260 MHz band by May 31st, 2011, it is
necessary to pay close attention to information on changes in the number of radio
stations for these systems to ensure that the frequency reallocation for these systems
will be smoothly completed by the set dates.
3) As the Frequency Assignment Plan stipulates that the frequency band for MCA land
mobile radio communications systems in the 800 MHz band must be reduced by May
31st, 2007, it is necessary to pay close attention to information on changes in the
number of radio stations for these systems in the future and consider how to use the
frequencies efficiently in the light of the development of digitization, etc.
4) With regard to personal radio systems, it is necessary to look at implementing
measures to use frequencies more efficiently, such as reallocating frequencies to
other radio spectrum usage systems, depending on information on changes in the
number of radio station for these systems, because the trend is for the number to
decrease substantially. For this reason, the Study Group suggests that what should be
done about these measures should be reviewed based on the results of the survey on
actual radio spectrum usage in three years time. Meantime, it is advisable to give full
consideration to this matter, including, but not limited to, the effects of abolishing
personal radio systems, for the next three years.
5) Audio STL/TTL systems in the 950 MHz band are being pushed into a transition to the
3.4 GHz frequency band and 14 of these radio stations are in service due to radiowave
propagation problems such as phasing. It is necessary, however, to consider replacing
these systems with wired systems or reallocating their frequency band(s) while paying
attention to information on the future usage of these radio stations from the viewpoint
of using the frequencies efficiently.
(2) Frequency band from 960 MHz to 1.215 GHz
For reasons, including, but not limited to, the fact that the frequencies of many radio
spectrum usage systems in this frequency segment have been internationally defined, it
would be generally difficult to replace them with other telecommunications methods or
reallocate them to other frequency band(s).
With regard to miscellaneous radars, however, it is desirable to consider developing
technologies such as reduction technology for spurious emissions and introducing them
to the radars to make the use of these frequencies more efficient while paying attention to
international integrity and the international markets.
(3) Frequency band from 1.215 GHz to 1.4 GHz
For reasons including, but not limited to, the fact that the frequencies used by many
radio spectrum usage systems in this frequency band have been internationally defined,
it would be generally difficult to replace them with other telecommunications methods or
reallocate them to other frequency band(s).
With regard to miscellaneous radars, however, it is desirable to consider developing
technologies such as reduction technology for spurious emissions and introducing them
３４
to the radars to make the use of these frequencies more efficient while paying attention to
international integrity and the international markets.
(4) Frequency band from 1.4 GHz to 1.71 GHz
1) As the Frequency Assignment Plan stipulates that the frequency band used by 1.5
GHz band MCA land mobile radio communications systems must be gradually
reduced by May 31st, 2005 and again by May 31st, 2009, it is necessary to pay close
attention to information on changes in the number of radio stations for these systems.
It is also necessary to consider how to use these frequencies more efficiently in the
light of the future use of released frequency bands, including efforts to move forward
the current reallocation date.
2) Concerning 1.5 GHz band cellular phone communications systems, it is necessary to
consider how to use the frequencies more efficiently in a way that allows for, but is not
limited to, reducing the frequencies assigned to 1.5 GHz band MCA land mobile radio
communications systems.
(5) Frequency band from 1.71 GHz to 2.4 GHz
Based on the survey results that more than 80% of radio stations for 1.9 GHz-band
fixed wireless access systems can be replaced by other telecommunications services
including wired systems, it is desirable to consider replacing these systems with other
systems in the light of information on the trends in deploying new radio spectrum usage
systems that make high-speed Internet services available to less-populated areas. It
must be remembered, however, that since these systems are using part of the PHS
frequency band outside PHS service areas, the replacement of all radio stations does not
directly lead to freeing up frequencies on a national basis.
(6) Frequency band from 2.4 GHz to 2.7 GHz
Concerning the frequency band that satellite mobile radio communications systems
are using, it is desirable to study the feasibility of measures to use the frequencies more
efficiently, including, but not limited to, reviewing the frequency bandwidth in the light of
information on the future trend in demand for these systems in the long and medium
terms and considerations on international interests in satellite orbits.
(7) Frequency segment from 2.7 GHz to 3.4 GHz
For reasons including, but not limited to, the fact that the frequencies used by many of
the radio spectrum usage systems in this frequency segment have been internationally
defined, it would be generally difficult to replace them by other telecommunications
methods or reallocate them to other frequency band(s).
With regard to miscellaneous radars, however, it is desirable to consider developing
technologies such as reduction technology for spurious emissions and introducing them
to the radars to make the use of these frequencies more efficient while paying attention to
international integrity and the international markets.
３５
(Reference 4)
Chapter 5 "Summary" Excerpted from the Summary of Results of the Fiscal 2005
Survey and Assessment on Actual Radio Spectrum Usage (Released on July 7th, 2006)
Chapter 5: Summary
The Fiscal 2005 Survey on Actual Radio Spectrum Usage conducted an assessment on
each of five frequency segments into which the frequency band below 770 MHz was divided.
As each frequency band had different use conditions, such as a certain band being allocated
to an international aeronautical radio navigation service or maritime mobile service, it was not
necessarily easy to compare the usage status in one band to that in another band. As a result
of the assessment, however, the Study Group drew the conclusion that all of the five
frequency bands were generally used properly as a whole.
When the Study Group focused on the individual radio spectrum usage systems in the
Survey, however, it found that some radio spectrum usage systems in frequency bands that
faced a decrease in the number of radio stations compared with the frequency bandwidth
assigned to them because of the decreasing demand for radio spectrum usage, could be
replaced by wired systems such as optical fiber, or could be reallocated to other frequency
band(s) and digital technology introduced, and that other systems suffered from a shortage of
the required bandwidth especially in urban areas and the effective use of bandwidth freed up
by the frequency reallocation should be considered.
This chapter summarizes the items that require future consideration in each frequency
band and at the same time looks at the distribution of radio stations over the entire frequency
band below 770 MHz based on this actual usage survey.
(1) Frequency band below 26.175 MHz
This frequency band is mainly utilized by radio spectrum usage systems such as radio
communications systems in the aviation and maritime fields and overseas international
broadcasting that are indispensable in ensuring the safety of human lives on a global
scale and that must use frequencies in compliance with the relevant international rules;
consequently it is impossible to evaluate them just by looking at the usage status for
radio stations in Japan. In spite of this fact, the Study Group mainly evaluates the
following systems from domestic factors:
３６
1) Since the survey results indicate that 100% of radio stations for relay broadcasts could
be changed to other telecommunications services within one year, it is appropriate to
systematically shift them to other telecommunications services.
2) Since the frequency width in the 3.8 MHz band used by amateur stations is narrow for
the number of amateur radio stations and the shortage of frequencies is severe in this
band, it is necessary to consider expanding the frequency band(s) that these amateur
stations can use while paying attention to the frequency allocation in this frequency
band.
(2) Frequency band from 26.175 MHz to 50 MHz
Since this frequency band is mainly utilized by near distance communication systems
such as marine radio communications by small boats, in addition to land-based amateur
stations, it would be generally difficult to replace them with other telecommunications
methods or reallocate them to other frequency band(s).
Consequently, the Study Group does not expect that this band will experience a
drastic change in the current situation in the years to come unless some changes such as
the deployment of new services with digitization and similar technologies will be
implemented.
(3) Frequency band from 50MHz to 222 MHz
Among the radio spectrum usage systems that use this frequency band, radio
communications systems in the aviation and maritime fields use frequencies in
compliance with the relevant international rules as in section (1) described above. On the
other hand, land-based radio communications systems include many customer-provided
telecommunication systems for public services for the government and municipalities and
utilities (such as electricity and gas) and general services that are used for home-delivery
services, taxi businesses, construction sites, etc. As they are pinched for the required
frequency bandwidths especially in urban areas, measures to use the radio spectrum
more efficiently, including conversion from analog to digital transmission, are being
deployed. In spite of these efforts, urban areas still suffer from a shortage of the required
bandwidth.
As public services, disaster contingency radio systems are indispensable for improving
the security and safety of Japanese citizens and there is a pressing need to digitize them.
In the light of this fact as well as discussions on using those frequencies freed up after
digitizing terrestrial TV broadcasting services more efficiently, it is important to consider
addressing the shortage of bandwidth that customer-provided telecommunication
systems are experiencing.
With the above discussion in mind, the Study Group evaluates these systems as
３７
follows:
1) With regard to prefecture disaster contingency administrative radio systems that use
frequencies in the 57.8675-60.5375 MHz and 60.7925-68 MHz bands, since the
Frequency Assignment Plan (Posts and Telecommunications Ministry Notice No. 746
of 2000) stipulates that the expiration date for using these frequency bands must be
November 30th, 2007, it is advisable to steadily reallocate other frequency band(s) to
these systems.
2) Many commercial telecommunications radio and meteorological radio systems that
use frequencies in the 60 MHz band are shifting to other telecommunications systems
and consequently the demand for the band is decreasing. In contrast, it is advisable to
consider abolishing or replacing the radio stations for these systems with
general-purpose systems while looking at: the trend towards a decrease in future
demand; and the introduction of a narrowing of the frequency bands and a conversion
to digital transmission. Special attention needs to be paid to the need for continuous
operation of these radio stations to provide telephony services to areas that lack
alternative telecommunications systems or where these services are unprofitable, and
to the necessity of laying telephone lines rapidly in these areas when communication
to them is cut off during a disaster.
3) It is appropriate to start to concentrate analog disaster contingency radio systems in
the 260 MHz band, which is the reallocation destination for digital disaster contingency
radio systems, as early as possible in conjunction with the digitization process,
because these analog systems are distributed to frequency bands other than the 150
MHz band, and to thereby attempt to use the frequencies more efficiently.
4) The Frequency Assignment Plan stipulates that the 90-108 MHz (channels 1 to 3) and
170-222 MHz (channels 4 to 12) frequency bands that terrestrial analog TV
broadcasting services are now using will be available to other applications when these
services are discontinued on July 24th, 2011. With regard to the usage of these
frequency bands after analog TV broadcasting services are discontinued, the
Telecommunications Council will invite the public to propose radio spectrum usage
systems, consider the technical considerations, and conduct a fundamental review of
this usage in its Telecommunications Technology Subcouncil. For this reason, it is
appropriate to study the matter in detail in the next actual usage survey on the
frequency band below 770 MHz.
(4) Frequency band from 222 MHz to 335.4 MHz
Since commercial telecommunications service radio paging systems (pagers) in the
280 MHz band are facing a substantial decrease in the number of subscribers due to the
３８
spread of cellular phone mail, it is necessary to consider how to use these frequencies
more efficiently in the future with attention paid to, but not limited to, a reduction in the
frequencies.
(5) Frequency band from 335.4 MHz to 770 MHz
Radio spectrum usage in this frequency band is similar to that in section (3) described
above.
1) It is appropriate to start to concentrate analog disaster contingency radio systems in
the 260 MHz band, which is the reallocation destination for digital disaster contingency
radio systems, as early as possible in conjunction with the digitization process,
because these analog systems are distributed to frequency bands other than the 400
MHz band and to thereby attempt to use the frequencies more efficiently.
2) With regard to convenience radio systems, which have the largest number of radio
stations in this frequency segment, it is appropriate to consider not only reducing the
congestion in this band, but also introducing a narrowing of the frequency bands and
converting to digital transmission from the viewpoint of using the frequencies
efficiently.
3) The Frequency Assignment Plan stipulates that the 710-770 MHz frequency sub-band
(channels 53 to 62)* within the 470-770 MHz frequency band (channels 13 to 62) that
terrestrial analog TV broadcasting services are now using will be available to mobile
radio communications after July 25th, 2012. With regard to the usage of this frequency
band, based on the 2003 report from the Telecommunications Council, the technical
considerations will be studied and a fundamental review of the usage will be carried
out in its Telecommunications Technology Subcouncil. For this reason, it is
appropriate to study the matter in detail in the next actual usage survey on the
frequency band below 770 MHz.
*With regard to the 710-722 MHz frequency band (channels 53 and 54), the
Frequency Assignment Plan stipulates that "the use of this frequency band with
broadcasting services must be reviewed by July 24th, 2006."
３９