Solution to Transmit Updated QoS Map Set from AP to STA

Solution to Transmit Updated QoS Map Set from AP to STA
January 2007 doc.: IEEE /0025r1 January 2007 Solution to Transmit Updated QoS Map Set from AP to STA Date: Authors: Notice: This document has been prepared to assist IEEE 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 Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures < ieee802.org/guides/bylaws/sb-bylaws.pdf>, 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 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Abstract This document indicates a problem in current u published draft [Draft-P802.11u-D0.02.pdf], provides three solutions to solve it, and wishes to confirm the final solution among one of them. This document focuses on the QoS Mapping mechanism. Note: latest update is marked in blue. And all the modification to the current draft is underlined. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Agenda Background Problem Description Solution Statement Motion
January 2007 doc.: IEEE /0025r1 January 2007 Agenda Background Problem Description Solution Statement Motion Reliability of Broadcast & Multicast Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Background In the interworking scenarios, the MAC layer QoS is not enough, because the external network may use a different QoS scheme u 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. For uplink: At the STA, there is a mapping from External QoS type (e.g. UMTS type via DSCP) to IEEE802 User Priority (in turn to EDCA ACs), or optionally to HCCA parameters. This will help the STA to construct correct QoS request to the QAP (e.g. ADDTS Request). At the AP, there is mapping from EDCA ACs to 802.1p when necessary. For downlink: At the AP, there is a mapping from 802.1p to EDCA ACs. QoS Mapping between DSCP and UP needs to be pre-configured at the AP for each directly connected SSPN. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

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

January 2007 doc.: IEEE /0025r1 January 2007 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. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 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? Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Solution Statement (Cont’d) – Unicast Solution
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Unicast Solution 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. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

The two problems shown in the previous slide should be solved.
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Unicast Solution modifications to the current draft If unicast solution is chosen, we propose the following things need to be done: The two problems shown in the previous slide should be solved. Change the 2nd paragraph in clause as shown below: The specified non-AP QSTA MAC address could be STA’s unicast MAC address. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Solution Statement (Cont’d) – Broadcast Solution
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Broadcast Solution 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 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 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. WLAN AP QoS Map Set #1 QoS Map Set #1 QoS Map Set #1 QoS Map Set #1 STA1 STA4 STA2 STA3 Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Broadcast Solution modifications to the current draft 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 1 Element ID. TBD 2 Length 3 Map ID 4 DSCP exception element #1 (optional) 5 DSCP exception element #2 (optional) 5+n-2 DSCP exception element #n (optional) 6+n-2 UP 0 DSCP Range element 7+n-2 UP 1 DSCP Range element 8+n-2 UP 2 DSCP Range element 9+n-2 UP 3 DSCP Range element 10+n-2 UP 4 DSCP Range element 11+n-2 UP 5 DSCP Range element 12+n-2 UP 6 DSCP Range element 13+n-2 UP 7 DSCP Range element Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Add the following text after Figure u-17:
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Broadcast Solution modifications to the current draft 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. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Broadcast Solution modifications to the current draft modification to figure STA QoS Map determination sequence when broadcast is used Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Solution Statement (Cont’d) – Multicast Solution
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Multicast Solution 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. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Multicast Solution modifications to the current draft If multicast solution is chosen, we propose that adding a Multicast Address IE into Table u4 in clause Order Information Category 1 Action 2 Dialog Token 3 QoS Map Set 4 Multicast Address Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Multicast Solution modifications to the current draft Add the following text after the last paragraph in clause : The multicast address is a multicast MAC address (6 octets) used for multicast mechanism. Change the 3rd paragraph after Figure u24 as shown below: When the STA queries the QoS Map in the action frame, the AP would be able to respond with proper QoS Map information and multicast address according to the VLAN/Tunnel setting allocated to the STA. If STA interprets multicast address IE in the response, it should join the multicast group. Change the last paragraph after Figure u24 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). If STA in the multicast group receives the QoS Map Configure frame, it should update its QoS Map Set based on the QoS Map Set in the QoS Map Configure frame. Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Multicast Solution modifications to the current draft modification to figure STA QoS Map determination sequence when multicast is used Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Solution Statement (Cont’d) – Conclusion
January 2007 doc.: IEEE /0025r1 January 2007 Solution Statement (Cont’d) – Conclusion Unicast Solution: It changes very little to the current draft, but produces two problems difficult to be solved. Broadcast Solution: It changes a little to the current draft, and AP has to maintain the Map ID. But it needs only one SSID in AP. Multicast Solution: It also changes a little to the current draft, and AP has to maintain the multicast address. I prefer multicast solution, because it has less limitation to SSID in AP. Any Comments? Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

January 2007 doc.: IEEE /0025r1 January 2007 Motion Move to accept the proposed changes of multicast solution (modification described in slide 17-19). Moved: Seconded: Result: (for-against-abstain) Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Reliability of Broadcast & Multicast
January 2007 doc.: IEEE /0025r1 January 2007 Reliability of Broadcast & Multicast Considering the reliability of broadcast/multicast solution, we prefer to send the broadcast/multicast frame multiple times which is adopted in the current GAS mechanism. Any comments? Peng Mo, Huawei Technologies Co., Ltd. Peng Mo, Huawei Technologies Co., Ltd.

Solution to Transmit Updated QoS Map Set from AP to STA

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