11-11-0357-00-00ai-a-focused-path-forwards-tgai-d1-0.pptx

March 2011 Marc Emmelmann, Fraunhofer FOKUS Slide 1 A focused path torwards TGai D1.0 Date: 2011-03-14 Authors: March 2011 Marc Emmelmann, Fraunhofer FOKUS Slide 2 Abstract Focused path towards D1.0 of TGai summarizing scope and assumptions of TGai per PAR 5C. March 2011 Marc Emmelmann, Fraunhofer FOKUS Slide 3 TGai Problem Statement Scope FIA SG TGai FLS Agreed problem statement: To much time spent in 802.11 link set-up Four major aspects: (1) AP discovery, (2) Network Discovery, (3) secure 802.11 link set-up, (4) higher layer (IP addr. Assignment) (1), (3), and (4) main focus of upcoming TG; (2) addressed by TGu Biggest potential for performance improvement: AP discovery “parallelization of message exchanges” for higher layer protocols Security: pre-conditions for security scheme strongly influence potential performance gain Scope: Modifications to the 802.11 MAC to enable fast link set-up “link” as defined per IEEE 802.11 baseline Application layer end-to-end- (secure) link set not in scope of TGai Concurrency in the exchange of higher layer messages during 802.11 link set-up is one approach to reduce the total time spent in link set-up (even if considering appl. Layer end2end links)but: providing schemes for providing concurrent message exchange is enough, TGai does not need to consider a completed link establishment on higher layers (just enable an “early” start of message exchange) STA can access“the Internet” Definition of Link Evaluation of Link Set-Up time We had several discussions during SG phase on the definition of “link”. Based on this discussion, the PAR uses language within the context of IEEE 802.11, i.e.: 3.76 link: In the context of an IEEE 802.11 medium access control (MAC) entity, a physical path consisting of exactly one traversal of the wireless medium (WM) that is used to transfer an MAC service data unit (MSDU) between two stations (STAs). [IEEE 802.11-2007] Given that TGai’s goal is to explore how to use concurrency of hig