Transcript IEEE C802.16m-09/0621

Bandwidth Request Scheme using QoS identifier
Document Number: IEEE C802.16m-09/0621
Date Submitted: 2009-03-02
Source:
Heejeong Cho
Kiseon Ryu
Doohyun Sung
Ronny(Yong-Ho) Kim
Jin Sam Kwak
E-mail : [email protected]
LG Electronics
Re:
IEEE 802.16m-09/0012 -Call for Contributions on Project 802.16m Amendment Working Document (AWD) Content, on the topic of
802.16m AWD – Bandwidth Request Procedure (based on the section 10.10 QoS and 11.9 UL Control Structure in SDD)
Purpose: To provide the details of the C802.16m-09/0619 - Proposed Text Related to Bandwidth Request Procedure for the IEEE 802.16m
Amendment
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Outline
• Bandwidth Request Scheme using QoS identifier
– Design for Bandwidth Request Message was
proposed in Session #58 (IEEE C80216m-08/1286r1).
– Bandwidth Request Schemes using QoS ID was
proposed in Session #59 (IEEE C80216m-09/0293).
• In this contribution, we provide more details for
the bandwidth request scheme.
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What is QoS ID? (1/2)
• QoS ID represents scheduling type and priority
to indicate the reason for requesting the
bandwidth.
QoS ID
Service Type
Scheduling Type
Priority
0
Delay sensitive service
Emergency
High
1
Delay sensitive service
Control signaling
High
2
Delay sensitive service
UGS / ertPS
High
3
Delay sensitive service
rtPS
High
4
Delay sensitive service
rtPS
Low
5
Delay tolerant service
nrtPS
High
6
Delay tolerant service
nrtPS / BE
Low
7
-
Reserved
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What is QoS ID? (2/2)
• An example of mapping the QoS ID
Service
Voice
Live video
streaming
Web
browsing
FTP
Chatting
Flow ID
1
2
3
4
5
UGS/ertPS
High
QoS ID
2
rtPS
High
3
nrtPS/BE
Low
6
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Design for Bandwidth Request
Message (1/5)
• Bandwidth request in the reference system
– MS should perform the procedure as many times as
the number of flows through which each data is to be
transmitted. (because of a connection unit basis)
– If requesting bandwidth for connection ID 3 and 4,
MS
BS
(1-1) CDMA contention for connection ID 3
(1-2) UL grant for connection ID 3
(1-3) BW-REQ for connection ID 3
(2-1) CDMA contention for connection ID 4
(2-2) UL grant for connection ID 4
……
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Design for Bandwidth Request
Message (2/5)
• To solve this problem
– It is necessary to support the scheme requesting
bandwidth for multiple connections.
– Solutions
• Using piggyback
• Using QoS ID and station ID
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Design for Bandwidth Request
Message (3/5)
• Solution using piggyback
– Piggyback additional BR information for other flows
• Disadvantage
– MS should include each BR information (e.g., flow ID, BR size)
for other flow IDs.
– Signaling overhead increases.
MS
BS
(1) BR indicator
(2) UL grant for BW-REQ
……
(5) Data with BR information for flow ID 4
(6) UL grant for flow ID 4
(7) Data for flow ID 4
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Design for Bandwidth Request
Message (4/5)
• Solution using QoS ID or station ID
– There are two bandwidth request types; QoS unit type
using QoS ID and station unit type using STID.
– QoS unit type
• When requesting bandwidth for one flow or multiple flows
whose QoS IDs are the same, this type is used.
• BW-REQ message contains bandwidth request type, STID,
request size, aggregate indicator and QoS ID.
– Station unit type
• When requesting bandwidth for multiple flows whose QoS IDs
are different, this type is be used.
• BW-REQ message contains bandwidth request type, STID,
request size and aggregate indicator.
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Design for Bandwidth Request
Message (5/5)
• Solution using QoS ID or station ID
– An example of the operation
MS
BS
QoS ID
1
2
Flow ID
1
2
3
3, 4
4
5
MS
BS
(1) BR indicator
(1) BR indicator
(2) UL grant for BW-REQ
(2) UL grant for BW-REQ
(3) BW-REQ for QoS ID 3
(3) BW-REQ for STID
(4) UL grant for data
(4) UL grant for data
(5) Data for flow ID 3 and 4
(5) Data for flow ID 3 and 5
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Amendment Text Proposal
Adopt text proposal for the 802.16m amendment in the
contribution IEEE C802.16m-09/0619 or its latest version.
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