1. Differentiated Association Service Provisioning in WiFi Networks
Month Year
doc.: IEEE yy/xxxxr0
March 2012
Differentiated Association Service Provisioning in WiFi Networks
Date: 03/02/2012
Authors:
Name
Affiliations
Address
Phone
Lin Cai
Huawei
3601 Algonquin Road, Rolling Meadows, IL 60008
George Calcev
Bin Chen
Ping Fang
Shenzhen, China
Rob Sun
Suite 400, 303 Terry Fox Drive, Kanata, Ontario K2K 3J1
Lin Cai et al ,Huawei.
John Doe, Some Company

2. March 2012
Abstract
This presentation proposes differentiated association service in WiFi networks to improve the latency of association as well as QoS performance of users
Lin Cai et al ,Huawei.

3. Conformance w/ TGai PAR & 5C
April 2009
doc.: IEEE /xxxxr0
March 2012
Conformance w/ TGai PAR & 5C
Conformance Question
Response
Does the proposal degrade the security offered by Robust Security Network Association (RSNA) already defined in ? No
Does the proposal change the MAC SAP interface?
Does the proposal require or introduce a change to the architecture?
Does the proposal introduce a change in the channel access mechanism?
Does the proposal introduce a change in the PHY?
Which of the following link set-up phases is addressed by the proposal?
(1) AP Discovery (2) Network Discovery (3) Link (re-)establishment / exchange of security related messages (4) Higher layer aspects, e.g. IP address assignment 3
Lin Cai et al ,Huawei.
Rich Kennedy, Research In Motion

4. Introduction Mobile hotspots use case [1]
March 2012
Introduction
Mobile hotspots use case [1]
A train has a mobile hotspot that connects to the Internet; and users onboard can connect to the AP and enjoy online gaming, videoing, web browsing, file transfer, and social networking, etc.
When a train enters the train station, users will leave the train and try to connect to the AP at the train station simultaneously
Lin Cai et al ,Huawei.

5. Problem Statement Bursty user association Objective
March 2012
Problem Statement
Bursty user association
Users arrives in a bursty manner
Severe collisions result from a large number of users attempting to associate with the AP simultaneously
Only a few users may be able to successfully associate with the AP during a certain time interval
Due to the bursty association requests, the QoS of existing traffic is highly affected
Objective
To improve the association performance of users
To reduce the impact on the existing users already associated with the AP
Lin Cai et al ,Huawei.

6. March 2012
Facts
Users have a diversity of multimedia applications with different quality of service (QoS) requirements
Realtime (video streaming) vs non-realtime (ftp file downloading)
Delay sensitive (voice) vs delay tolerant (http traffic)
Users may have different delay tolerance levels for network association; greedy/immediate association only reduces the association efficiency but not guarantee fast link setup
Lin Cai et al ,Huawei.

7. Proposed Solution Differentiated association service
March 2012
Proposed Solution
Differentiated association service
Allow users to use different priorities to associate with the AP
High priority users can immediately attempt to associate with the AP; low priority users should defer their association for a duration so that give high priority users more chance to associate first
For instance, the association priority could be allocated by the operator policy rules or based on the type of traffic classes active during the (re-)association process
Lin Cai et al ,Huawei.

8. Example
March 2012 t0
Class 1 t1
Class 1 & 2 t2
Class 1 & 2 & 3 t3
Class 1&2&3&4
Class 1
Class 2
Class 3
Class 4
The train stops in the station at the instance t0, when all users start their association process
Class 1 (with the highest priority) can attempt to associate with the AP immediately at t0
Class 2 defers association and starts at t1; and class 3 and class 4 (lowest priority) starts at a later time of t2 and t3, respectively
EDCA can be applied to further improve differentiated services
Lin Cai et al ,Huawei.

9. March 2012
Reference
[1] IEEE /0797r0, “Use Case: Mobile hotspot”, May 2011.
Lin Cai et al ,Huawei.

10. March 2012
Stroll Poll -1
Do you agree to add a new section, called “QoS Provision in FILS”, in the TGai SFD, 12/0151r3, i.e.,
6. QoS Provision in FILS
Yes: 24
No: 3
Need more information: 18
Lin Cai et al ,Huawei.

11. March 2012
Stroll Poll -2
Do you agree to add the sentence to TGai SFD, 12/0151r3.
“FILS devices shall support differentiated association services with different priorities”?
Yes: 25
No: 10
Abstain: 14
Lin Cai et al ,Huawei.