doc.: IEEE /0249r0 Submission March 2012 Slide 1Lin Cai et al,Huawei. Differentiated Association Service Provisioning in WiFi Networks Date: 03/02/2012 Authors: NameAffiliationsAddressPhone Lin Cai Huawei 3601 Algonquin Road, Rolling Meadows, IL George Calcev Huawei3601 Algonquin Road, Rolling Meadows, IL wei.com Bin ChenHuawei3601 Algonquin Road, Rolling Meadows, IL m Ping FangHuaweiShenzhen, China om Rob SunHuaweiSuite 400, 303 Terry Fox Drive, Kanata, Ontario K2K 3J1

doc.: IEEE /0249r0 Submission Abstract This presentation proposes differentiated association service in WiFi networks to improve the latency of association as well as QoS performance of users March 2012 Lin Cai et al,Huawei.Slide 2

doc.: IEEE /0249r0 Submission Conformance w/ TGai PAR & 5C Lin Cai et al,Huawei.Slide 3 Conformance QuestionResponse 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?No Does the proposal require or introduce a change to the architecture?No Does the proposal introduce a change in the channel access mechanism?No Does the proposal introduce a change in the PHY?No 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 March 2012

doc.: IEEE /0249r0 Submission 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 March 2012 Lin Cai et al,Huawei.Slide 4

doc.: IEEE /0249r0 Submission 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 March 2012 Lin Cai et al,Huawei.Slide 5

doc.: IEEE /0249r0 Submission 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 March 2012 Lin Cai et al,Huawei.Slide 6

doc.: IEEE /0249r0 Submission 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 March 2012 Lin Cai et al,Huawei.Slide 7

doc.: IEEE /0249r0 Submission March 2012 Lin Cai et al,Huawei.Slide 8 Example t0t1 t2t3 Class 1Class 1 & 2 Class 1 & 2 & 3Class 1&2&3&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 Class 1Class 2Class 3Class 4

doc.: IEEE /0249r0 Submission Reference [1] IEEE /0797r0, “Use Case: Mobile hotspot”, May March 2012 Lin Cai et al,Huawei.Slide 9

doc.: IEEE /0249r0 Submission Stroll Poll Do you agree that FILS devices should support differentiated association services with different priorities? Yes: No: Abstain: March 2012 Lin Cai et al,Huawei.Slide 10