Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS)
Submission Title: [XtremeSpectrum -- SG3a CFA response]
Date Submitted: [January 14, 2002]
Source: [Pierre Gandolfo] Company [XtremeSpectrum Inc.]
Address [1001 N Rengstorff Avenue, Suite 200, Mountain View, CA, 94043]
Voice [(650) 230 0494], Fax [(650) 938-7071], E-mail [[email protected]]
Re: [IEEE P802.15 ALT PHY Study Group was formed with the charter of drafting a PAR and 5
Criteria for an ALT PHY option for the 802.15.3 MAC]
Abstract: [Description of a class of applications and PHY requirements for 802.15.3a in
response to the CFA request]
Purpose: [for January 2002 interim]
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis
for discussion and is not binding on the contributing individual or organization. The material in
this document is subject to change in form and content after further study. The contributor
reserves the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property
of IEEE and may be made publicly available by P802.15.
January 2002
doc.: IEEE 802.15-02/031
Agenda
• Minimum Desired Data Bandwidth for High Speed
Cable Replacement
• Market Trends for Home Networking
• “Evernet” or the need for implementing Scatternet
Submission
Slide 2
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Desired Data Bandwidth for HS Cable Replacement
•
High Speed DV transfer from a 1394 digital camcorder to a PC can
peak at 50Mbps
– Digital Video Editing is today’s single most popular usage for 1394
– 8M camcorders were shipped in 2001 and 12.7M will be shipped in 2004
•
New Apple IPOD (MP3 Player) is equipped with a 1394a port
(100Mbps)
– Capable of downloading an entire CD in less than 10 seconds and a full
5GB of music from a PC in less than 10 minutes
– Its 5GB HD doubles as a Firewire mobile disk for files and applications
(presentations, pictures, documents, entire digital movies)
•
Total AV bandwidth for DVD players is currently limited to around
36Mbps on the 1394 bus:
– This allows good video quality using 30Mbps (30 frames/s, 720x576 pixels
per frame, 24-bit color/pixel)
– Rest of Bandwidth (6Mbps) is available for audio
– “The less you compress the video, the better it looks (<1:5)”
Submission
Slide 3
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Desired Data Bandwidth for HS Cable Replacement (II)
•
•
Video gaming with high quality graphics running at 60 fps with a
resolution moving towards HDTV (1280x720) will also require some
extra bandwidth
High Resolution digital still cameras (>5M pixels) drive the need for
memory cards with higher storage capacity and connections with
faster data transfer speed:
–
–
–
–
–
•
CF+ : 8MB – 512MB
SmartMedia cards (Fuji & Olympus) : 8 – 128MB
IBM Microdrive: 340MB (can hold hundreds of high resolution images or 6 hours of
CD quality audio), 500MB, 1GB
Sony Memory Stick: 64MB and 128MB
SanDisk MM Card: 8MB – 64MB
High Resolution Printer and Scanner (4000 dpi) are equipped with a
1394 connection (100Mbps and above)
Minimum Required Effective Throughput = 50Mbps
Submission
Slide 4
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Max. 802.15.3 Effective Throughput (for one stream and per packet size)
•
Parameters:
–
Superframe size = 20ms, Preamble/Header data rate = 22Mb/s, Header (14 bytes), 3MTS
slots per superframe (one for Association and two open ones), Imm-ACK, Beacon
Frame Body = 46 bytes, no CAP, No Guard Times
Effective Throughput (bps)
Max MTU Size
8.00E+07
Throughput
7.00E+07
22Mbps
6.00E+07
33Mbps
5.00E+07
44Mbps
4.00E+07
55Mbps
3.00E+07
75Mbps
2.00E+07
100Mbps
1.00E+07
0.00E+00
8
16
32
64
128
256
Packet Size (Byte)
•
•
512 1024 2044 Min. Required
Throughput
Ideal Scenario is assumed: one stream only in an error-free environment (I.e “upper bound
performance)
A Data Rate greater than 55Mbps is needed to support the applications previously described
Submission
Slide 5
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
PHY Requirements for High Speed Cable Replacement
•
End-users want nothing less than the performance of a wired
network without the wires
– 1394a already supports 100, 200, and 400Mbps
– USB 2.0 specifies a maximum speed of 480Mbps
•
•
Range is not really important for this specific application since 1394a
specifies a maximum cable length of 4.5m
Limited Number of non-overlapping channels (3)
– 3 independent end-users downloading their respective pictures to 3
different kiosks
•
To sum up, “Wireless without Compromise”:
– Very High Speed PHY Technology
• Minimum Effective Throughput = 50Mbps
–
–
–
–
Low Power PHY Technology
Low Cost PHY Technology
Small form factor (embedded applications)
As secure as a cable
Submission
Slide 6
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Mono-Cluster Home Network
Legend:
Mono-cluster = Single
Wireless Distribution Point
covering the entire home
premise area
•
The Mono-Cluster approach is unsuited to the requirements of
concurrent multimedia-rich applications:
– Poor effective throughput per user (shared media)
– Lack of Flexibility:
• no two houses or even apartments are alike (room, size, wall, applications)
• One macrocell network cannot be optimized for every single end-user scenario
Submission
Slide 7
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Legend:
Multi-Cluster Home Network
Multi-cluster = Multiple
Wireless Distribution Points
covering the entire home
premise area
UMPW
HUB
Home Office
Cluster
(infrastructure)
USB Cluster (adhoc)
1394 Home
Entertainment
Cluster
(infrastructurebased)
Kids’ room Cluster
(ad-hoc or
infrastructure-based)
Gateway
(OSGi)
1394 Backbone
Wired Backbone (HPNA, HomePlug, Ethernet, …) or 802.11a wireless Bridge (54-108Mbps)
Submission
Slide 8
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
PHY Requirements for Multi-cluster Home Network
•
•
Shorter Distances allow for spectrum reuse, thereby serving more
users/devices/applications while enabling simpler wireless devices
(low power, low cost, small form factor)
Performance is the ratio of Spatial capacity by Power consumption,
cost and form factor:
Performance =
•
Spatial Capacity
bps/sqm2
Power * Cost * Size
W.$.m3
Maximizing individual cluster speed while maintaining a low level CoChannel interference (CCI)
– The adequate number of non-overlapping channels will depend on the
selected modulation waveform
•
Multipath Environment: JTC Residential A and B
Submission
Slide 9
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Scatternet or Multi-hop Ad-hoc Network
Coordinators
•
•
•
Proxy Nodes
or Wireless
Bridges
Definition: Autonomous, robust, efficient and dynamic system made of
multiple piconets and connected to each other by some “wireless links”
(hops)
Goal: Discovering/updating the links between these different groups of
devices and building paths (routing) across the multi-hop ad-hoc network
Advantages: Devices belonging to different clusters can exchange data
without relying on a fixed wired backbone [02/xxx]
–
–
–
Inexpensive alternative to cell-based mobile network infrastructure
No dependency -- Most wired backbones do not support the needed data rates and
QoS provisions for MM applications
Undeserved segment (no competition)
Submission
Slide 10
Pierre Gandolfo, XtremeSpectrum Inc.
January 2002
doc.: IEEE 802.15-02/031
Conclusion
• Broad Set of applicability:
– Video Editing
• Digital Camcorders, PC’s, Pro AV’s
– Casual Storage
• PC’s, external storages, digital still cameras, MP3 players
– High Resolution PC Peripherals
– A/V Networking
• DVCR’s, DVD’s, HDTV, Game Consoles, set-top boxes,…
• Multiple Vendors and numerous users:
– “Ubiquitous Value Network”: Moving to a Networking AV
broadband area
• Distinct Identity: “Wireless without compromise”
• Several companies have already demonstrated technical and
economic feasibility
Submission
Slide 11
Pierre Gandolfo, XtremeSpectrum Inc.