Scalable Station Association Information Handling (Summary) January 2007 doc.: IEEE 802.11-07/0176r0 January 2007 Scalable Station Association Information Handling (Summary) Date: 2007-1-18 Authors: Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <stuart.kerry@philips.com> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <patcom@ieee.org>. Azman Osman Lim, et.al. Azman Osman Lim, et.al.

The problem of a huge proxy table for all MAPs January 2007 The problem of a huge proxy table for all MAPs + + MAP Table + STA Table + MAP STA Azman Osman Lim, et.al.

802.11s Path Selection Protocol January 2007 802.11s Path Selection Protocol In current 802.11s specification, two path selection protocols are defined. Hybrid Wireless Mesh Protocol (HWMP) – default protocol. Radio-aware OLSR (RA-OLSR) – optional protocol. In order to handle legacy STAs, Efficiency could be Scalability could be Control Overhead could be HWMP < RA-OLSR HWMP > RA-OLSR Azman Osman Lim, et.al.

January 2007 Our Proposed Schemes We have proposed three schemes to solve the problem of a huge proxy table in each MAP. Efficient LAB/GAB Management Scheme Centralized Station Discovery Scheme On-demand Station Discovery Scheme Azman Osman Lim, et.al.

Efficient LAB/GAB Management Scheme January 2007 Scheme 1: Efficient LAB/GAB Management Scheme Azman Osman Lim, et.al.

January 2007 Motivation The periodical broadcasting of LABA/LABCA message will generate a large communication overhead throughout the network of 802.11s Mesh WLAN. To solve the CID 3649, 3651, 5697, 5698, 5699, 5700 of comment resolution (07/0023r2) Approach We introduce a Local Association Update Checksum Advertisement (LAUCA) message to shrink down the overhead. We introduce GABI_REQ and GABI messages to obtain the GAB in a shorter time with less overhead for a newly joined MP/MAP. Azman Osman Lim, et.al.

Centralized Station Discovery Scheme January 2007 Scheme 2: Centralized Station Discovery Scheme Azman Osman Lim, et.al.

January 2007 Motivation The periodical sharing of GAB information by all the MPs/MAPs will generate a large communication overhead in the network of 802.11s Mesh WLAN. To solve the CID 5701, 5702, 5703 of comment resolution (07/0023r2) Approach By assuming the periodical collecting GAB information is configured and the 6-address scheme is applied, we propose a Centralized Station Discovery Scheme, which allows the Root to collect the LABA messages from all MAPs and provide the required entry of the proxy table to MPs/MAPs. Azman Osman Lim, et.al.

On-demand Station Discovery Scheme January 2007 Scheme 3: On-demand Station Discovery Scheme Azman Osman Lim, et.al.

January 2007 Motivation The periodical sharing of GAB information by all the MPs/MAPs will generate a large communication overhead in the network of 802.11s Mesh WLAN. To solve the CID 4605, 4606, 4607, 5701, 5702, 5703 of comment resolution (07/0023r2) Approach By assuming the periodical sharing GAB information is not configured, we propose an On-demand Station Discovery Scheme, which allows a MP/MAP to broadcast an Association Base Address Request (ABAR) message to discover a station and also allows a MAP to unicast a LABA message to inform the discovered station information. Upon receiving the LABA message, the MP/MAP treats the LABA message as an entry of discovered station in its proxy table. This proxy table indirectly takes the role of GAB. Azman Osman Lim, et.al.

Summary of Proposed Three Schemes January 2007 doc.: IEEE 802.11-07/0176r0 January 2007 Summary of Proposed Three Schemes Azman Osman Lim, et.al. Azman Osman Lim, et.al.

January 2007 Straw Poll Shall we consider the first scheme (Efficient LAB/GAB Management Scheme) and prepare texts based on it for adoption ? Yes: No: Abstain: Shall we consider the second scheme (Centralized Station Discovery Scheme) and prepare texts based on it for approval ? Shall we consider the third scheme (On-demand Station Discovery Scheme) and prepare texts based on it for approval ? Azman Osman Lim, et.al.

January 2007 References Scalable Station Association Information Handling, 11-06/1842r4 IEEE P802.11s Draft D1.0 Comments Resolution of IEEE P802.11s, 11-07/0023r2 Azman Osman Lim, et.al.