1. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 1 End-to-End QoS awareness for admission control Date: 2007-07-17 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, 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@ok-brit.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.http:// ieee802.org/guides/bylaws/sb-bylaws.pdf stuart@ok-brit.compatcom@ieee.org

2. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 2 Abstract This presentation will discuss the End-to-End (E2E) QoS aware admission control scenarios between WLAN and external networks to improve the user satisfaction.

3. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 3 User satisfaction - describes how the application is perceived by the end-users. - is determined by E2E QoS parameters as defined in ITU-T G.1010 [1], including delay, delay jitter, packet loss rate, etc. ⇒ E2E QoS awareness needs to be considered in WLAN. Admission control - has been used to achieve QoS awareness. - is defined in 802.11e by using ADDTS request/response frame exchange. - takes into account of current traffic status within a BSS or multiple BSSs if the AP switch is deployed. ⇒ E2E QoS aware admission control will improve users satisfaction. Motivation

4. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 4 What is E2E QoS awareness? SSPN/Internet Email: Typical data amount: <10 kB One-way delay: several minutes Packet loss rate: 0 Conversational Voice: Typical data rate: 4-64kbps One-way delay: <150ms (preferred) <400ms (limit) Delay variation: <1ms Packet Loss rate: <3% STA1 MT1 WLAN Cellular Conversational Voice: Typical data rate: 4-64kbps One-way delay: <30ms (preferred) <50ms (limit) Delay variation: <1ms Packet Loss rate: <3% E2E QoS Per-BSS QoS

5. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 5 Admission Control Reference : 11-03-0727-02-0wng-interworking-mac-issues.ppt Admission control within one BSS is proposed in 802.11e. BUT –How does.11e interact with other admission control decisions of external networks? –What are the impacts on user experience (source STA/MT and destination STA/MT)? Admission Control User Authorisation Information (from SSPN) Wireless Link (BSS) Traffic Information Control SSPN information: - load at other APs or SSPN (how?)

6. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 6 What’s benefits from E2E QoS aware admission control? (1/2) E2E QoS aware admission control can increase/decrease the BSS admission capacity adaptively to meet E2E QoS requirements at the user. SSPN/Internet STA1 MT1 WLAN Cellular e.g., Total Delay 200ms Aggregate Delay 70-100ms Tolerable Delay 100-130ms BSS Admission Capacity: Admission capacity will be adaptive to accept or reject additional transmission

7. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 7 What’s benefits from E2E QoS aware admission control? (2/2) E2E QoS aware admission control may use an unified QoS aware parameter setting among heterogeneous access networks depending on the traffic classes. This unified parameter setting will improve the end- user satisfaction. SSPN/Internet STA1 MT1 WLAN Cellular e.g., Voice: Access Delay parameter, Data: Packet Error Rate Cellular Admission Control E2E QoS aware Request: PER 3% QoS parameter setting: Unified QoS parameter setting can be used among heterogeneous access networks. Individual Admission ControlWLAN Admission Control

8. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 8 Summary and Recommendation E2E QoS aware admission control will –Improve user experience in the application layer –Adjust the WLAN admission capacity adaptively without violating QoS of ongoing connections. –Use unified methodology for E2E QoS parameter setting among heterogeneous access networks to meet end-user satisfaction.

9. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 9 Thanks & Questions

10. doc.: IEEE 802.11-07/xxxx Submission July 2007 Lei Du, DoCoMo Beijing Labs Slide 10 Straw Poll Should Task Group U receive further presentations of methods supporting E2E QoS aware for admission control? Yes:No: