January 2007
doc.: IEEE 802.11-07/0025r1
MAPID for User Plane Support
Date: 2007-01-08
Authors:
Name
Company
Address
Phone
email
Peng Mo
Huawei
[email protected]
Patrick Mo
Huawei
[email protected]
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Submission
Slide 1
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
Submission
Slide 2
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Agenda
•
•
•
•
Background
Problem Description
Solution Statement
Motion
Submission
Slide 3
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
Submission
Slide 4
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Background (Cont’d) –
QoS 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
Slide 5
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
STA
AP
AAA Client
AAA Server
(Re-)Association Request
(Re-)Association Response
802.11i/ EAP
Authentication
Access-Accept
EAP-Success
(Keying info + tunnel)
Associate STA to
VLAN per AAA
4 way handshake
Action Frame (QoS Map
Request)
Action Frame (QoS Map
Configure)
Action Frame (QoS Map
Configure)
Submission
Slide 6
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Agenda
•
•
•
•
Background
Problem Description
Solution Statement
Motion
Submission
Slide 7
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Problem Description
STA
AP
AAA Client
AAA Server
(Re-)Association Request
(Re-)Association Response
802.11i/ EAP
Authentication
Access-Accept
EAP-Success
(Keying info + tunnel)
Associate STA to
VLAN per AAA
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?
Submission
Slide 8
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Agenda
•
•
•
•
Background
Problem Description
Solution Statement
Motion
Submission
Slide 9
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
Submission
Slide 10
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
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.
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.
WLANQoS Map SetAP
#1
QoS Map Set #1
STA1
STA4
STA2
Submission
STA3
Slide 11
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Solution Statement (Cont’d) –
Broadcast Solution
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.
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
Slide 12
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
Submission
Slide 13
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Solution Statement (Cont’d) –
Broadcast Solution
STA
AP
AAA Client
AAA Server
(Re-)Association Request
(Re-)Association Response
802.11i/EAP Authentication
Access-Accept
(Keying info + tunnel)
EAP-Success
Associate STA to VLAN per AAA
4 way handshake
QoS Map Request
QoS Map Configure
(QoS Map Set(Map ID))
Broadcast
QoS Map Configure
( new QoS Map Set(Map ID))
modification to figure STA QoS Map determination sequence when broadcast is used
Submission
Slide 14
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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.
Submission
Slide 15
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Solution Statement (Cont’d) –
Multicast Solution
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.
Submission
Slide 16
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Solution Statement (Cont’d) –
Multicast Solution
STA
AP
AAA Client
AAA Server
(Re-)Association Request
(Re-)Association Response
802.11i/EAP Authentication
Access-Accept
(Keying info + tunnel)
EAP-Success
Associate STA to VLAN per AAA
4 way handshake
QoS Map Request
QoS Map Configure
(QoS Map Set,multicast address)
Multicast
send to the multicast address
QoS Map Configure
(new QoS Map Set)
modification to figure STA QoS Map determination sequence when multicast is used
Submission
Slide 17
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
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
Slide 18
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Agenda
•
•
•
•
Background
Problem Description
Solution Statement
Motion
Submission
Slide 19
Peng Mo, Huawei Technologies Co., Ltd.
January 2007
doc.: IEEE 802.11-07/0025r1
Motion
• Move to accept the proposed changes (in red).
• Moved:
• Seconded:
• Result: (for-against-abstain)
Submission
Slide 20
Peng Mo, Huawei Technologies Co., Ltd.