doc.: ieee 802.11-07/0025r1 submission january 2007 peng mo, huawei technologies co., ltd.slide 1...
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January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 1
doc.: IEEE 802.11-07/0025r1
Submission
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.
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Date: 2007-01-08
Name Company Address Phone email Peng Mo Huawei [email protected]
Patrick Mo Huawei [email protected]
Authors:
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 2
doc.: IEEE 802.11-07/0025r1
Submission
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.
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 3
doc.: IEEE 802.11-07/0025r1
Submission
Agenda
• Background
• Problem Description
• Solution Statement
• Motion
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 4
doc.: IEEE 802.11-07/0025r1
Submission
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.
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 5
doc.: IEEE 802.11-07/0025r1
Submission
Background (Cont’d) –QoS Map Set element description
OrderSize (octets)
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
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 6
doc.: IEEE 802.11-07/0025r1
Submission
Background (Cont’d)
STA AP AAA ServerAAA Client
(Re-)Association Request
(Re-)Association Response
802.11i/ EAP Authentication
Access-Accept
(Keying info + tunnel)
Associate STA to VLAN per AAA
EAP-Success
4 way handshake
Action Frame (QoS Map Request)
Action Frame (QoS Map Configure)
Action Frame (QoS Map Configure)
• 802.11u provides the Action Frame (QoS Map Configure) and the procedure shown as below for the STA to get the QoS Map.
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 7
doc.: IEEE 802.11-07/0025r1
Submission
Agenda
• Background
• Problem Description
• Solution Statement
• Motion
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 8
doc.: IEEE 802.11-07/0025r1
Submission
Problem DescriptionSTA AP AAA ServerAAA Client
(Re-)Association Request
(Re-)Association Response
802.11i/ EAP Authentication
Access-Accept
(Keying info + tunnel)
Associate STA to VLAN per AAA
EAP-Success
4 way handshake
Action Frame (QoS Map Request)
Action Frame (QoS Map Configure)
Action Frame (QoS Map Configure)
• “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?
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 9
doc.: IEEE 802.11-07/0025r1
Submission
Agenda
• Background
• Problem Description
• Solution Statement
• Motion
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 10
doc.: IEEE 802.11-07/0025r1
Submission
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
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 11
doc.: IEEE 802.11-07/0025r1
Submission
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
STA2 STA3STA4
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 #1QoS Map Set #1QoS Map Set #1
Solution Statement (Cont’d) – Broadcast Solution
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 12
doc.: IEEE 802.11-07/0025r1
Submission
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.
OrderSize (octets)
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
Solution Statement (Cont’d) – Broadcast Solution
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 13
doc.: IEEE 802.11-07/0025r1
Submission
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.
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 14
doc.: IEEE 802.11-07/0025r1
Submission
Solution Statement (Cont’d) – Broadcast Solution
STA AP AAA Cl i ent AAA Server
(Re- )Associ at i on Request
(Re- )Associ at i on Response
(Keyi ng i nfo + tunnel )
Access-Accept
802. 11i / EAP Authenti cat i on
EAP-Success
Associ ate STA to VLAN per AAA
4 way handshake
QoS Map Request
QoS Map Confi gure(QoS Map Set(Map I D))
QoS Map Confi gure ( new QoS Map Set(Map I D))
Broadcast
modification to figure STA QoS Map determination sequence when broadcast is used
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 15
doc.: IEEE 802.11-07/0025r1
Submission
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
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 16
doc.: IEEE 802.11-07/0025r1
Submission
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
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 17
doc.: IEEE 802.11-07/0025r1
Submission
STA AP AAA Cl i ent AAA Server
(Re- )Associ at i on Request
(Re- )Associ at i on Response
(Keyi ng i nf o + tunnel )
Access-Accept
802. 11i / EAP Authenti cat i on
EAP-Success
Associ ate STA to VLAN per AAA
4 way handshake
QoS Map Request
QoS Map Confi gure(QoS Map Set, mul t i cast address)
QoS Map Confi gure(new QoS Map Set)
Mul t i castsend to the mul t i cast address
modification to figure STA QoS Map determination sequence when multicast is used
Solution Statement (Cont’d) – Multicast Solution
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 18
doc.: IEEE 802.11-07/0025r1
Submission
• 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
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 19
doc.: IEEE 802.11-07/0025r1
Submission
Agenda
• Background
• Problem Description
• Solution Statement
• Motion
January 2007
Peng Mo, Huawei Technologies Co., Ltd.
Slide 20
doc.: IEEE 802.11-07/0025r1
Submission
Motion
• Move to accept the proposed changes (in red).
• Moved:
• Seconded:
• Result: (for-against-abstain)