January 2007 doc IEEE 802 11 070020 r
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January 2007 doc. : IEEE 802. 11 -07/0020 r 1 MAPID for User Plane Support Date: 2007 -01 -08 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 <http: // ieee 802. 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 <stuart. kerry@philips. 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 <patcom@ieee. org>. Submission 1 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Abstract This document indicates a problem in current 802. 11 u published draft [Draft-P 802. 11 u-D 0. 02. pdf] and offers solutions to solve it. This document focuses on the Qo. S Mapping mechanism. Submission 2 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Agenda • • Background Problem Description Solution Statement Motion Submission 3 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Background • In the interworking scenarios, the 802. 11 MAC layer Qo. S is not enough, because the external network may use a different Qo. S scheme. 802. 11 u provides the solution with the Qo. S Map Set element, which defines the mapping from DSCP contained in a packets IP header to the user priority. Submission 4 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Background (Cont’d) – Qo. S Map Set element description Size (octets) Order Description 1 1 Element ID. TBD 2 1 Length 3 2 DSCP exception element #1 (optional) 4 2 DSCP exception element #2 (optional) 4+n-2 2 DSCP exception element #n (optional) 5+n-2 2 UP 0 DSCP Range element 6+n-2 2 UP 1 DSCP Range element 7+n-2 2 UP 2 DSCP Range element 8+n-2 2 UP 3 DSCP Range element 9+n-2 2 UP 4 DSCP Range element 10+n-2 2 UP 5 DSCP Range element 11+n-2 2 UP 6 DSCP Range element 12+n-2 2 UP 7 DSCP Range element Submission 5 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Background (Cont’d) • 802. 11 u provides the Action Frame (Qo. S Map Configure) and the procedure shown as below for the STA to get the Qo. S Map. Submission 6 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Agenda • • Background Problem Description Solution Statement Motion Submission 7 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Problem Description • “When the AP has a change in the Qo. S Map information, it can also use the Action Frame to configure the Qo. S 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 Qo. S Map at the STA without solicitation? Unicast ? Broadcast ? Multicast? Submission 8 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Agenda • • Background Problem Description Solution Statement Motion Submission 9 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Unicast Solution Unicast solution is one choice for the Qo. S Map Configure frame to configure the Qo. S Map at the STA. The destination address of the Qo. S Map Configure frame is the STA’s unicast MAC address when AP updates the Qo. S 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 Qo. S Map Configure frame will make STA confused. Submission 10 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Broadcast Solution Broadcast solution is one choice for the Qo. S Map Configure frame to configure the Qo. S Map at the STA The destination address of the Qo. S Map Configure frame is the broadcast address when AP updates the Qo. S Map information. AP may serve STAs from different SSPNs, different Qo. S Map information for different SSPNs should be maintained by the same AP. So there should be a flag to distinguish the different Qo. S Map information. SSPN a SSPN b Qo. S Map Set #1 has changed, AP needs to inform STA 1, 2 of the new Qo. S Map Set, but STA 3, 4 also receives the Qo. S Map Set because of the broadcast frame. WLAN STA 1, 2 are subscribers of SSPN a. STA 3, 4 are subscribers of SSPN b. Qo. S Map Set #1 is associated with SSPN a. Qo. S Map Set #2 is associated with SSPN b. AP Qo. S Map Set #1 STA 4 STA 2 Submission STA 3 11 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Broadcast Solution If broadcast solution is chosen, we propose that adding a Map ID in the Qo. S Map Set (Figure u-17) to identify the Qo. S Map Set. Size (octets) Order Description 1 1 Element ID. TBD 2 1 Length 3 2 Map ID 4 2 DSCP exception element #1 (optional) 5 2 DSCP exception element #2 (optional) 5+n-2 2 DSCP exception element #n (optional) 6+n-2 2 UP 0 DSCP Range element 7+n-2 2 UP 1 DSCP Range element 8+n-2 2 UP 2 DSCP Range element 9+n-2 2 UP 3 DSCP Range element 10+n-2 2 UP 4 DSCP Range element 11+n-2 2 UP 5 DSCP Range element 12+n-2 2 UP 6 DSCP Range element 13+n-2 2 UP 7 DSCP Range element Submission 12 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 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 Qo. S Map Set element of the Qo. S Map Configure frame. One Qo. S 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 Qo. S Map information, it can also use the Action Frame to configure the Qo. S Map at the STA without solicitation (as shown in the broken line at the bottom of the sequence). The STA should update the Qo. S Map information based on the Map ID. Submission 13 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Broadcast Solution modification to figure STA Qo. S Map determination sequence when broadcast is used Submission 14 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Multicast Solution Multicast solution is one choice for the Qo. S Map Configure frame to configure the Qo. S Map at the STA. The destination address of Qo. S Map Configure frame is a multicast address when AP updates the Qo. S Map information. One multicast address should be allocated for One Qo. S Map Set by AP, and different Qo. S Map Sets should have different multicast addresses. AP should inform the STA of the multicast address, and the STA should join the multicast group. Submission 15 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Multicast Solution If multicast solution is chosen, the following conditions should be fulfilled: – When the STA sends a unicast Qo. S Map Request frame to request the Qo. S Map information, AP should reply with a unicast Qo. S Map Configure frame with the Qo. S Map Set and a multicast address. The STA should get the multicast address from the Qo. S Map Configure frame and join the multicast group. – When AP has any change in the Qo. S Map information, the destination address of Qo. S Map Configure frame should be a multicast address. All STAs of the multicast group should process the Qo. S Map Configure frame. Submission 16 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Multicast Solution modification to figure STA Qo. S Map determination sequence when multicast is used Submission 17 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Solution Statement (Cont’d) – Proposal • 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. Submission 18 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Agenda • • Background Problem Description Solution Statement Motion Submission 19 Peng Mo, Huawei Technologies Co. , Ltd.
January 2007 doc. : IEEE 802. 11 -07/0020 r 1 Motion • Move to accept the proposed changes (in red). • Moved: • Seconded: • Result: (for-against-abstain) Submission 20 Peng Mo, Huawei Technologies Co. , Ltd.
