submission doc.: ieee 802.11-13/0076r0 january 2013 reachable address message for relay date:...
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Submission
doc.: IEEE 802.11-13/0076r0January 2013
Reachable Address Message for RelayDate: 2013-01-14
Authors:
Jafarian, Qualcomm
Slide 1
Name Affiliations Address Phone email Amin Jafarian Qualcomm 5775 Morehouse Dr,
San Diego, CA 8588451243 [email protected]
Alfred Asterjadhi Qualcomm
Simone Merlin Qualcomm
Santosh Abraham Qualcomm
Menzo Wentink Qualcomm
Hemanth Sampath Qualcomm
VK Jones Qualcomm
Sun, Bo ZTE [email protected]
Lv, Kaiying ZTE [email protected]
Huai-Rong Shao Samsung [email protected]
Chiu Ngo Samsung [email protected]
Minho Cheong ETRI 138 Gajeongno, Yuseong-gu, Dajeon, Korea
+82 42 860 5635
Jae Seung Lee ETRI [email protected]
Hyoungjin Kwon ETRI [email protected]
Heejung Yu ETRI [email protected]
Jaewoo Park ETRI [email protected]
Sok-kyu Lee ETRI [email protected]
Sayantan Choudhury Nokia
Taejoon Kim Nokia
Klaus Doppler Nokia
Chittabrata Ghosh Nokia
Esa Tuomaala Nokia
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Jafarian, Qualcomm
Slide 2
Name Affiliations Address Phone email Minyoung Park Intel Corp. [email protected]
Tom Tetzlaff Intel Corp. [email protected]
Emily Qi Intel Corp. [email protected]
Su Khiong Yong Marvell [email protected]
Hongyuan Zhang Marvell [email protected]
Sudhir Srinivasa Marvell [email protected]
Yongho Seok LG Electronics LG R&D Complex Anyang-Shi, Kyungki-Do, Korea
+82-31-450-1947 [email protected]
Jinsoo Choi LG Electronics
Jeongki Kim LG Electronics
Jin Sam Kwak LG Electronics
Matthew Fischer Broadcom 190 Mathilda Place, Sunnyvale, CA
+1 408 543 3370 [email protected]
Eric Wong Broadcom [email protected]
Yong Liu Broadcom [email protected]
Rojan Chitrakar Panasonic [email protected]
Ken Mori Panasonic [email protected]
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Slide 3
Jafarian, Qualcomm
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Jafarian, Qualcomm
Introduction
• The concept of Relay was introduced in the last meeting [1]– Quick recap in next slide
• Backward learning bridge is used for populating the forwarding tables
• However, in some conditions, backward learning is not possible – Due to the absence of data frames to be used for learning
• We propose to define a ‘Reachable Address’ Frame to be used for explicitly updating the forwarding tables
Slide 4
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Jafarian, Qualcomm
Recap
• R-STA is a non-AP STA with the following capabilities– 4 address support– Supports forwarding and receiving frames from the
R-AP• R-AP is an AP with the following additional
capabilities– 4 address support mandatory, i.e., – Supports forwarding and receiving frames to/from
the R-STA
Slide 5
S2
AP
R1 R2
S1 S3
R-STA
R-AP
RELAY
Root AP (Rt-AP)
Backward learning bridge principle may be used to set up the forwarding tables
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Jafarian, Qualcomm
Issue with backward learning bridge
• Issues: – When STA moves to another Relay, MAC solution may not rely on
higher layer protocols to send an MSDU to AP; if no MSDU is sent, backward learning is not possible; we need a fallback mechanism for a robust MAC solution • Nowadays, ARP is commonly used and when associating with an AP, STA
usually starts ARP; but when moving between two relays in same subnet, STA need not re-do ARP and may not send any frame to AP
• Also, MAC-only or other new protocols other than ARP may be used in the future for new IoT applications
– When a Relay moves to another AP, it needs to update the parent AP with its children MAC addresses
– Upon moving Relays and STAs, we need to guarantee the consistency of forwarding tables
Slide 6
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Solution
• R-STA to use a Layer 2 “ReachableAddress” message to update root AP about new STAs, if the STAs do not send frames to root AP that allow for backward learning– Message may include a list of MAC addresses and other fields that help
the AP to update its forwarding tables and resolves conflicts
Slide 7
Jafarian, Qualcomm
Submission
doc.: IEEE 802.11-13/0076r0January 2013
Straw poll
1. Move to include in the SFD the ReachableAddress message that is used to update the forwarding tables? – Content and format TBD
Slide 8
Jafarian, Qualcomm
Submission
doc.: IEEE 802.11-13/0076r0January 2013
References
[1] 11-12-1323-00-00ah-relay.pptx
Jafarian, QualcommSlide 9