Scenarios and strategies for the
introduction of integrated wireless
- optical network access
Mihai Mateescu - DT
Antti Siitonen- HPY
Ralf Schuh DT
MTM’99 Workshop
1
Heidelberg, 25 February 1999
Summary
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•
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Goals
Elements of strategy
Architectures
HFR Focus
Deployment scenarios and service applications
Evaluation and conclusions
MTM’99 Workshop
2
Heidelberg, 25 February 1999
Goals
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Objective: a flexible access network
– allocates access related functions and mobility dynamically
between the radio and the optical part
– integrates wireless and optical segments
– provides an integrated set of broadband services across the
mobile/fixed boundary
•
“more value with less cost”
– synergy of wireless, mobile and optical access, optimised optical
infrastructure
– larger service penetration
MTM’99 Workshop
3
Heidelberg, 25 February 1999
Elements of an introduction
strategy
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technical aspects of wireless-optical access, based on
technology evolution (UMTS, ITU, ATM Forum) of existing
and planned access networks
compatibility with PON access and radio point to
multipoint systems
implementation aspects of HFR technology (ease of
deployment, flexibiliy, etc.)
guidelines for operators (frequency bands, migration
paths from existing infrastructure
MTM’99 Workshop
4
Heidelberg, 25 February 1999
Architectures
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FTTx + Fixed Radio (LMDS), FTTx + Radio
RITL (UMTS)
focus on HFR architectures
MTM’99 Workshop
5
Heidelberg, 25 February 1999
HFR Focus
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allows radio functionality to be removed away from the
Remote Antenna Unit (RAU) by shifting it to the
centralised head end
offers fixed and mobile wireless broadband access with a
radio-independent fiber access network
different radio feeder concepts as Intermediate
Frequency (IF) over fiber with electrical frequency
conversion at the RAU or direct Radio Frequency (RF)
transport are possible
MTM’99 Workshop
6
Heidelberg, 25 February 1999
Radio Spectrum for 2G and 3G
radio systems
UMTS
DECT
DCS-1800 / IS 95
JDC
GSM-900 / IS 54
1
B
3 GHz
0.5
2
S
2
3
Ultra
High Frequency
12
4
X
G H
I
6
8 10
18
Ku
27
K
J
40
Ka
20
30 40
M
80
100 GHz
Extra
High Frequency
mm - WAVES
MICRO WAVES
10 cm
Millimeter
L
K
Super
High Frequency
RADIO WAVES
1m
8
C
F
E
D
1
300 GHz
4
L
C
MBS
HIPERLAN-2
300 MHz
UHF
LMDS/MVDS/HIPERACCESS
W-LAN
(IEEE 802.11)
1 cm
1 mm
MTM’99 Workshop
7
Heidelberg, 25 February 1999
HFR with different feeder
concepts
RAU
centralized BS / headend
(a) IF feeder concept (fIF ~ 1 GHz)
S-SMF Splitter
Network
NT
BB
IF
E
downlink
O
O
IF
E
fIF
RF
EDFA
(b) RF feeder concept
S-SMF Splitter
Network
NT
BB
RF
E
downlink
O
O
EDFA
fRF
E
MTM’99 Workshop
8
Heidelberg, 25 February 1999
Commercial available HFR
products
Company
Ortel Corporation,
USA
Anacom Systems
Corporation,
USA
NETI, Inc.
Taiwan
FOXCOM
Israel
Product Description
fR & BW & L
More
Information
Direct modulation – direct detection
DFB/FP laser, PIN photodiode
 =1.3 and 1.55 µm
SMF
Direct modulation – direct detection
DFB/FP laser, PIN photodiode
 =1.3 µm and 1.55 µm
SMF / multimode fibre
fR < 18 GHz
Direct modulation – direct detection
DFB/FP laser, PIN photodiode
 =1.3 µm and 1.55 µm
SMF
For Satellite ground systems
 = 1.3 µm
http://www.neti.co
BW < 2200 MHz m.tw/
indoor
Sanders, a Lockheed
Martin Company
USA
Direct modulation – direct detection
WDM option
ALLGON Systems
AB,
Sweden
Fibre optic repeater system
www.ortel.com/
BW < 2000 MHz
http://www.broadb
BW < 2000 MHz and-guide.com/
company/anacoms
ys.html
fR < 2.5 GHz
fR < 2 GHz
http://www.fxcom.
BW < 2000 MHz com/
L < 10 km
for PCS systems http://www.sander
s.com/telecomm/c
fR < 2 GHz
ontact.htm
fR < 2.2 GHz
www.allgon.com
-
MTM’99 Workshop
9
Heidelberg, 25 February 1999
Deployment scenarios
Example: Integrated wireless - optical ATM
Fixed ATM
Backbone
ATM
Network
Termination
Wireless
Access
Network
HFR Subsystem
Radio
Basestation
HFR
Headend
RAU
Mobile
Terminal
MTM’99 Workshop
10
Heidelberg, 25 February 1999
Deployment scenarios
Example: HFR and UMTS
HFR
Feeder
System
ATM Core
Network
UMTS
Cellular
Network
RAU
ATM
Interface
RAU
HFR
UMTS
ATM
Network Basestation Headend
Termination
RAU
MTM’99 Workshop
11
Heidelberg, 25 February 1999
Service applications
HFR for fixed wireless access
R AU with
Fibre Node
Te rmina tion
1 to 4
, fS ,1 to 4
4 fi
bre
s
S ate llite acce s s
> 4 fibres
C e nt ra l Offic e
co uple r
fR,1 fS ,1 1
BS
Loca l
s e rve r
fR,n fS ,n n
S witc hing Ra dio R F/IF to Optic
C e ntre Units
Interfa ce
Co re
Ne twork
Distance
1 - 5 km
WDM
c oup le rs
> 1 fibre
1 to 4
, fS ,5 to 8
Broadcast
co uple r
fR : ra dio carrie r freq ue ncy or s o me IF
fS : s u b -ca rrier freq u en cy
: a t 1 .3 µm o r a t 1.5 5 µm WDM o r DWDM
MTM’99 Workshop
12
Heidelberg, 25 February 1999
Service applications
HFR access system for PCS
5 to 8
f
, S ,6 to 10
2 , fS ,2
S ate llite acce s s
1 , fS ,1
Co uple r
C e ntra l Offic e
fR,1 fS ,1 1
BS
Loca l
s e rve r
fR,n fS ,n n
WDM
c oup le rs
x
, fS ,5 to 7
S witc hing Ra dio R F/IF to Optic
C e ntre Units
Interfa ce
Co re
Ne twork
x, fS ,1
x, fS ,2
2 fibre s
 1 to 3
MTM’99 Workshop
13
Heidelberg, 25 February 1999
Single mode fibre with bus architecture and passive
EAMs
2 fibres
1 down, 1 up
•Connection to
core network
BS
f1
f2
f3
f4
1
2
3
4
f1,1
f2,2
WDM Laser
& Optical
receiver
- bus architecture and passive
EAMs with WDM-system leads to
quite complicated system.
f3,3
- star architecture without WDM is
recommended for indoor use.
MTM’99 Workshop
f4,4
14
Heidelberg, 25 February 1999
Evaluation
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In outdoor environment HFR with active E/O - O/E
converters is suitable for high user density areas in order
to reduce the investments in base stations. Both fixed
and mobile radio systems may be applied.
Due to the centralised base station the radio resources
can be allocated efficiently in the network.
In indoor applications the passive EAM with single mode
fibres and star topology is suitable to offer local mobility
within the building.
MTM’99 Workshop
15
Heidelberg, 25 February 1999
Evaluation (continued)
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Usage of WDM or DWDM reduces the count of fibres.
However the current WDM technology is more suitable
for the core networks than for access networks.
– WDM adds complexity and extra cost for HFR
– There is also high insertion loss in WDM components
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Multimode fibres cannot be used with passive EAM
MTM’99 Workshop
16
Heidelberg, 25 February 1999
Conclusions
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HFR systems increase the capacity of cellular and
fixed radio networks and decrease the base station
system complexity
HFR promotes the mobility in access networks
HFR is optimal for micro or pico cells
The passive EAM is optimal for indoor applications
MTM’99 Workshop
17
Heidelberg, 25 February 1999