1. Extended 802.22 Network Topologies
January 2006
doc.: IEEE /0006r0
Extended Network Topologies
Author:
Abstract
This contribution summarizes graphically different network topologies and use cases that can exist with the inclusion of personal/portable devices in the operation of WRAN systems in view of defining what can be considered in an extended PAR and a new PAR.
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Gerald Chouinard, CRC
Gerald Chouinard, CRC

2. “Regional Area Network” Multipath absorption Window (Cyclic prefix )
January 2006
doc.: IEEE /0006r0
IEEE Standards
IEEE
RAN
“Regional Area Network”
30 km
37 μsec
Multipath absorption Window (Cyclic prefix )
0.25
2.2 μsec
0.8
The IEEE Working Group which is developing the WRAN standard is adding anotherr layer to the set of licensed-exempt wireless systems. It will be able to operate in the low-VHF (ch. 2-6), high-VHF (ch. 7-13) and UHF (ch. 14 to 51 and 69 where possible). It will use the standard TV channels, 6, 7 and 8 MHz wide. Each channel can carry some 20 Mbit/s capacity and its modulation (2000 carriers OFDMA) will be robust to long echoes (up to about 25 usec) found on these longer paths.
23 Mbit/s
BW= 6,7,8 MHz
MHz
Gerald Chouinard, CRC
Gerald Chouinard, CRC

3. Long round-trip delays
January 2006
doc.: IEEE /0006r0
- Cable-modem / ADSL
Rural Broadband:
- WiFi hot-spots in ISM bands
- Medium power wireless systems
5 km
- Higher power, lower frequency broadband access system
30 km
23 km
16 km
MAC
Long round-trip delays
QPSK
16-QAM
64-QAM
PHY
Adaptive modulation
Example of a progressive coverage of a rural town/village and its surrounding. A higher power, lower frequency broadband access system such as the WRAN is needed to extend the coverage to some 30 km (limited by NLOS propagation). The actual limit in extent of coverage allowed by the standard will be up to 100 km.
Gerald Chouinard, CRC
Gerald Chouinard, CRC

4. WRAN edge of coverage: up to 30 km
WRAN BS
4 Watt
30 m
WRAN edge of coverage: up to 30 km
WRAN CPE
4 Watt
10 m outdoors
Gerald Chouinard, CRC

5. 802.22 WRAN augmented with portable devices (Extended PAR)
WRAN BS
4 Watt
30 m
Portable
100 mW
Portable
50 mW
Portable
100 mW
WRAN edge of coverage: up to 30 km
WRAN CPE
4 Watt
10 m outdoors
Gerald Chouinard, CRC

6. 802.22 WRAN augmented with portable devices (new PAR)
Interoperability
Relaying
Hand-off
Portable
100 mW
WRAN BS
4 Watt
30 m
Portable
100 mW
Portable
50 mW
Portable
100 mW
WRAN edge of coverage: up to 30 km
WRAN CPE
4 Watt
10 m outdoors
Gerald Chouinard, CRC

7. January 2006
doc.: IEEE /0006r0
References
IEEE P802.22™/ DRAFTv2.0 Draft Standard for Wireless Regional Area Networks Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Policies and procedures for operation in the TV Bands, April 2008
sg-whitespace ecsg-adhoc-use-case-slide-deck.ppt
PAR extension for portable CPEs.doc
Gerald Chouinard, CRC
Gerald Chouinard, CRC