1. Scalable Station Association Information Handling (Summary)
January 2007
doc.: IEEE /0176r0
January 2007
Scalable Station Association Information Handling (Summary)
Date:
Authors:
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Azman Osman Lim, et.al.
Azman Osman Lim, et.al.

2. 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.

3. 802.11s Path Selection Protocol
January 2007
802.11s Path Selection Protocol
In current s 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.

4. 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.

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

6. January 2007
Motivation
The periodical broadcasting of LABA/LABCA message will generate a large communication overhead throughout the network of s 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.

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

8. January 2007
Motivation
The periodical sharing of GAB information by all the MPs/MAPs will generate a large communication overhead in the network of s 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.

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

10. January 2007
Motivation
The periodical sharing of GAB information by all the MPs/MAPs will generate a large communication overhead in the network of s 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.

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

12. 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.

13. 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.