1. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 1 MAPID for User Plane Support 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 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.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2007-01-08 Authors:

2. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 2 Abstract This document indicates a problem in current 802.11u published draft [Draft-P802.11u-D0.02.pdf] and offers solutions to solve it. This document focuses on the QoS Mapping mechanism.

3. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 3 Agenda Background Problem Description Solution Statement Motion

4. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 4 Background In the interworking scenarios, the 802.11 MAC layer QoS is not enough, because the external network may use a different QoS scheme. 802.11u provides the solution with the QoS Map Set element, which defines the mapping from DSCP contained in a packets IP header to the user priority.

5. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 5 Background (Cont’d) – QoS Map Set element description Order Size (octets) Description 11Element ID. TBD 21Length 32DSCP exception element #1 (optional) 42DSCP exception element #2 (optional) 4+n-22DSCP exception element #n (optional) 5+n-22UP 0 DSCP Range element 6+n-22UP 1 DSCP Range element 7+n-22UP 2 DSCP Range element 8+n-22UP 3 DSCP Range element 9+n-22UP 4 DSCP Range element 10+n-22UP 5 DSCP Range element 11+n-22UP 6 DSCP Range element 12+n-22UP 7 DSCP Range element

6. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 6 Background (Cont’d) 802.11u provides the Action Frame (QoS Map Configure) and the procedure shown as below for the STA to get the QoS Map.

7. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 7 Agenda Background Problem Description Solution Statement Motion

8. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 8 Problem Description “When the AP has a change in the QoS Map information, it can also use the Action Frame to configure the QoS Map at the STA without solicitation (as shown in the broken line at the bottom of the figure). ” How to use the Action Frame to configure the QoS Map at the STA without solicitation? Unicast ? Broadcast ? Multicast?

9. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 9 Agenda Background Problem Description Solution Statement Motion

10. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 10 Unicast solution is one choice for the QoS Map Configure frame to configure the QoS Map at the STA. The destination address of the QoS Map Configure frame is the STA’s unicast MAC address when AP updates the QoS Map information. But unicast solution will bring two problems: 1. Unicast solution will bring more resource consumption, such as radio resources, state machines of AP. 2. Dialog Token in the unsolicited QoS Map Configure frame will make STA confused. Solution Statement (Cont’d) – Unicast Solution

11. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 11 Broadcast solution is one choice for the QoS Map Configure frame to configure the QoS Map at the STA The destination address of the QoS Map Configure frame is the broadcast address when AP updates the QoS Map information. AP may serve STAs from different SSPNs, different QoS Map information for different SSPNs should be maintained by the same AP. So there should be a flag to distinguish the different QoS Map information. SSPN a WLAN AP STA1 STA2STA3 STA4 SSPN b STA 1,2 are subscribers of SSPN a. STA 3,4 are subscribers of SSPN b. QoS Map Set #1 is associated with SSPN a. QoS Map Set #2 is associated with SSPN b. QoS Map Set #1 QoS Map Set #1 has changed, AP needs to inform STA 1,2 of the new QoS Map Set, but STA 3,4 also receives the QoS Map Set because of the broadcast frame. QoS Map Set #1 Solution Statement (Cont’d) – Broadcast Solution

12. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 12 If broadcast solution is chosen, we propose that adding a Map ID in the QoS Map Set (Figure u-17) to identify the QoS Map Set. Order Size (octets) Description 11Element ID. TBD 21Length 32Map ID 42DSCP exception element #1 (optional) 52DSCP exception element #2 (optional) 5+n-22DSCP exception element #n (optional) 6+n-22UP 0 DSCP Range element 7+n-22UP 1 DSCP Range element 8+n-22UP 2 DSCP Range element 9+n-22UP 3 DSCP Range element 10+n-22UP 4 DSCP Range element 11+n-22UP 5 DSCP Range element 12+n-22UP 6 DSCP Range element 13+n-22UP 7 DSCP Range element Solution Statement (Cont’d) – Broadcast Solution

13. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 13 Solution Statement (Cont’d) – Broadcast Solution Add the following text after Figure u-17: The Map ID is maintained by AP and returned in the QoS Map Set element of the QoS Map Configure frame. One QoS Map Set is identified by one Map ID. Change the last paragraph of the clause P.2.1 as shown below: When the AP has a change in the QoS Map information, it can also use the Action Frame to configure the QoS Map at the STA without solicitation (as shown in the broken line at the bottom of the sequence). The STA should update the QoS Map information based on the Map ID.

14. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 14 Solution Statement (Cont’d) – Broadcast Solution modification to figure STA QoS Map determination sequence when broadcast is used

15. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 15 Multicast solution is one choice for the QoS Map Configure frame to configure the QoS Map at the STA. The destination address of QoS Map Configure frame is a multicast address when AP updates the QoS Map information. One multicast address should be allocated for One QoS Map Set by AP, and different QoS Map Sets should have different multicast addresses. AP should inform the STA of the multicast address, and the STA should join the multicast group. Solution Statement (Cont’d) – Multicast Solution

16. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 16 If multicast solution is chosen, the following conditions should be fulfilled: – When the STA sends a unicast QoS Map Request frame to request the QoS Map information, AP should reply with a unicast QoS Map Configure frame with the QoS Map Set and a multicast address. The STA should get the multicast address from the QoS Map Configure frame and join the multicast group. – When AP has any change in the QoS Map information, the destination address of QoS Map Configure frame should be a multicast address. All STAs of the multicast group should process the QoS Map Configure frame. Solution Statement (Cont’d) – Multicast Solution

17. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 17 modification to figure STA QoS Map determination sequence when multicast is used Solution Statement (Cont’d) – Multicast Solution

18. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 18 Broadcast and multicast solution are both good choices, we propose using the broadcast solution because it results in the least changes to the current draft. Solution Statement (Cont’d) – Proposal

19. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 19 Agenda Background Problem Description Solution Statement Motion

20. doc.: IEEE 802.11-07/0025r1 Submission January 2007 Peng Mo, Huawei Technologies Co., Ltd.Slide 20 Motion Move to accept the proposed changes (in red). Moved: Seconded: Result: (for-against-abstain)