1. WAVE ITS Station Technical Capabilities Summary
February 2009
doc: IEEE /0238r1
March 2009
WAVE ITS Station Technical Capabilities Summary
Date:
Authors:
R. Roy, Connexis
R. Roy, SRA

2. Current Station Capabilities ?
February 2009
doc: IEEE /0238r1
March 2009
Current Station Capabilities ? AP
STA
B-link (BSS link)
STA
R. Roy, Connexis
R. Roy, SRA

3. Current Station Capabilities ?
February 2009
doc: IEEE /0238r1
March 2009
Current Station Capabilities ?
P-link
STA
STA
(non-(i)BSS link)
P ~ promiscuous
R. Roy, Connexis
R. Roy, SRA

4. Current Station Capabilities ?
February 2009
doc: IEEE /0238r1
March 2009
Current Station Capabilities ? AP
STA
B-link
P-link
R. Roy, Connexis
R. Roy, SRA

5. TGp Member Polls Can devices (802.11 STAs) communicate using B-links?
February 2009
doc: IEEE /0238r1
March 2009
TGp Member Polls
Can devices ( STAs) communicate using B-links?
YES: NO:
Can devices ( STAs) communicate using P-links?
Can devices ( STAs) communicate “simultaneously using ”* P-links and B-links?
“Simultaneously using” means “sequentially queue” P-link and B-link frames for transmission.
R. Roy, Connexis
R. Roy, SRA

6. TGp Member Polls (continued)
February 2009
doc: IEEE /0238r1
March 2009
TGp Member Polls (continued)
IF YOU ANSWERED “NO” TO ANY OF THE PREVIOUS QUESTIONS:
Do you believe there is a technical reason why devices ( STAs) can not communicate over B-links?
YES: NO:
Do you believe there is a technical reason why devices ( STAs) can not communicate over P-links?
Do you believe there is a technical reason why devices ( STAs) can not communicate “simultaneously using” B-links and P-links?
“Simultaneously using” means “sequentially queue” P-link and B-link frames for transmission.
R. Roy, Connexis
R. Roy, SRA

7. TG Member Polls (continued)
February 2009
doc: IEEE /0238r1
March 2009
TG Member Polls (continued)
IF YOU ANSWERED YES TO ANY OF THE THREE QUESTIONS ON THE PREVIOUS SLIDE:
Are you willing to provide either in writing or orally for the record the technical reasons you believe that such communications can not take place?
YES: NO:
IF YOU ANSWERED YES TO THE PREVIOUS QUESTION:
Are you willing to commit to doing so before the next wg meeting?
R. Roy, Connexis
R. Roy, SRA

8. Can devices (802.11 STAs) communicate using B-links?
February 2009
doc: IEEE /0238r1
March 2009
WG Member Polls
Can devices ( STAs) communicate using B-links?
Can devices ( STAs) communicate using P-links?
Can devices ( STAs) communicate “simultaneously using”* P-links and B-links?
“Simultaneously using” means “sequentially queue” P-link and B-link frames for transmission.
R. Roy, Connexis
R. Roy, SRA

9. WG Member Polls - Responses
February 2009
doc: IEEE /0238r1
March 2009
WG Member Polls - Responses
MEMBER Q1 Q2 Q3
George Vlantis (ST Micro)
YES
Richard Paine (TGk Chair)
Ganesh Venkatesan (Intel)
Roger Durand (Research in Motion)
Bruce Kramer (Marvel, WG Chair, TGn Chair)
Andrew Myles (Cisco, WiFi Alliance Chair)
Justin McNew (Kapsch-TrafficCom) (Implementation is not necessarily trivial.)
Mark Hamilton (Polycom)
Darwin Engwer (Nortel Networks)
Alistair Malarky (Mark IV)
Do not know
R. Roy, Connexis
R. Roy, SRA

10. A BIT OF HISTORY March 2009 February 2009 doc: IEEE 802.11-09/0238r1
R. Roy, Connexis
R. Roy, SRA

11. Beacons are not transmitted on the Control Channel
February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 3: wave-summary-recommendations-wave-using ppt) Beacon Suppression
Beacons are not transmitted on the Control Channel
No network association; devices are not required to join a network prior to data transmission/reception (pseudo IBSS mode) …
R. Roy, Connexis
R. Roy, SRA

12. February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 3: wave-summary-recommendations-wave-using ppt)
Service Channels can utilize Beacons according to information received on the Control Channel (Control Channel mode is also permitted)
Determined by upper layers (RSU service table)
Typical networks can be established on Service Channels
R. Roy, Connexis
R. Roy, SRA

13. February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 4: wave-summary-recommendations-wave-using ppt) Authentication & Association
Not permitted on the Control Channel
Security Keys are managed by upper layers
Permitted on Service Channels according to information received on the Control Channel
R. Roy, Connexis
R. Roy, SRA

14. Full range of QoS mechanisms can be used on the Service Channels
February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 8: wave-summary-recommendations-wave-using ppt) Priority Mechanisms
Priority is needed to provide priority access to public safety applications, particularly on the Control Channel
No Beacons, assumes simply the use of AIFS (802.11e) rather than using DIFS
Full range of QoS mechanisms can be used on the Service Channels
R. Roy, Connexis
R. Roy, SRA

15. Unique MAC per radio (can use “virtual radios” – multiple MAC per PHY)
February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 32: wave-wave-concepts-update-proposed-document-additions.ppt) Queue Routing Triggers
Channelization function uses IPv6 destination address
Based on destination MAC if unicast
Based on IPv6 Prefix (and Subnet ID) if broadcast
May need multicast address trigger
May need multicast group address designation in PST
Second radio required if more than one service channel used per RSU
Unique MAC per radio (can use “virtual radios” – multiple MAC per PHY)
Unique IPv6 prefix
R. Roy, Connexis
R. Roy, SRA

16. February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 32: wave-wave-concepts-update-proposed-document-additions.ppt) Channelization Overview
Generalized Approach – One set of prioritized queues for each channel
A simple implementation may support only one service channel at a time (single set of prioritized queues)
R. Roy, Connexis
R. Roy, SRA

17. February 2009
doc: IEEE /0238r1
March 2009
(SLIDE 9: wave-summary-recommendations-wave-using ppt) Summary
Extra time associated with scanning and association has been removed by simplifying the MAC on the Control Channel, where all communication devices are initialized
Service Channels can use “simple MAC” or extensive MAC features (e.g e and i)
10 MHz channel parameters are consistent with j
R. Roy, Connexis
R. Roy, SRA

18. February 2009
doc: IEEE /0238r1
March 2009
(FROM SLIDE 3: wave-summary-recommendations-wave-using ppt)
Service Channels can utilize Beacons according to information received on the Control Channel (Control Channel mode is also permitted)
Determined by upper layers (RSU service table)
Typical networks can be established on Service Channels
R. Roy, Connexis
R. Roy, SRA

19. THE PRESENT March 2009 February 2009 doc: IEEE 802.11-09/0238r1
R. Roy, Connexis
R. Roy, SRA

20. March 2009 February 2009 doc: IEEE 802.11-09/0238r1 R. Roy, Connexis
R. Roy, SRA

21. no additional hardware, by employing a virtual second WiFi interface.
February 2009
doc: IEEE /0238r1
March 2009
FROM INTEL’s WEBSITE
Intel® My WiFi Technology – Intel announced the availability of Intel My WiFi technology, a wireless driver and software update to Intel® Centrino® 2 processor technology based laptops. This software enables a WiFi Personal Area Network (PAN) for WiFi Certified™ consumer electronic devices such as photo frames, cameras and printers. Intel doubles the laptop’s WiFi capability, with
no additional hardware, by employing a virtual second WiFi interface.
The dual interface takes advantage of available Intel® 5100 WiFi Link and Intel® 5300 WiFi Link adapters as well as existing antennas to manage both Wireless LAN and WiFi PAN connections.
Source:
R. Roy, Connexis
R. Roy, SRA

22. February 2009
doc: IEEE /0238r1
March 2009
CONCLUSION
It is possible to implement “simultaneous” B-link (“inside”) and P-link (“outside the context of a BSS”) on currently available STAs.
R. Roy, Connexis
R. Roy, SRA

23. February 2009
doc: IEEE /0238r1
March 2009
SUBMISSIONS
The following submissions provide text changes to the latest 11p draft that attempt allow this functionality to be developed and be compliant:
p-clause 5 changes.doc
p-clause 7 MAC frame header related changes.doc
R. Roy, Connexis
R. Roy, SRA

24. February 2009
doc: IEEE /0238r1
March 2009
TGp Member Polls
Do you believe TGp should allow for currently available STAs to “simultaneously” engage in B-link and P-link operations?
YES: NO:
R. Roy, Connexis
R. Roy, SRA

25. TGp Member Polls IF YOU ANSWERED NO TO THE PREVIOUS QUESTION:
February 2009
doc: IEEE /0238r1
March 2009
TGp Member Polls
IF YOU ANSWERED NO TO THE PREVIOUS QUESTION:
Are you willing to provide a valid technical reason why you do NOT believe TGp should allow for currently available STAs to “simultaneously” engage in B-link and P-link operations?
YES: NO:
R. Roy, Connexis
R. Roy, SRA