BS Centrally Controlled Peer-to-Peer Communication
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16m-08/199r1
Date Submitted:
2008-03-17
Source:
Gang Shen, Kaibin Zhang, Dongyao Wang, Jianming Wu, Shan Jin
Alcatel Shanghai Bell
Voice:
E-mail:
Xiaolu Dong, Ying Du
E-mail:
CATR
Venue:
Re:
Call for comments on C802.16m-08/118r1
Contribution pertains to: IEEE 802.16m Frame Structure Design
Base Contribution:
IEEE C802.16m-08/199r1
Purpose:
For discussion and adoption in SDD.
Notice:
+ 86-21-58541240-7167
gang.a.shen@alcatel-sbell.com.cn
dongxiaolu@mail.ritt.com.cn
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Peer-to-Peer Communication
• The IMT-Advanced Network Topology proposes multi-hop, mesh and P2P
(peer-to-peer) modes
• P2P: traffic from one MS to another MS directly, or multi-hop
communication through intermediate RS or MS
– Possibly not passing BS
• Advantages of P2P
– High flexibility, reliability, load balance, etc.
– Eliminate the high burden and possible traffic bottleneck in links to/from BS
Key problem: how to control & manage P2P for scheduling, management, routing, etc.
BS Controlled Peer-to-Peer Communication
• Peer-to-peer communication under BS control
– MS / RS exchanges control information with BS directly, e.g. bandwidth
request/allocation.
– Peer-to-peer data traffic is relayed via intermediate RSs or MSs
– Example procedure,
•
•
•
•
•
MS sends a bandwidth request to BS directly for P2P service
BS may check the involved intermediate node to setup a P2P connection
MS/RS receives MAP from BS for P2P resource allocation
MS starts P2P communication under BS control
Involved MS/RS is required to report status continuously during the communication
– For MS that is out of the BS coverage, RS may take the responsibility for
control signals forwarding
Control link (direct control information
exchange between MS/RS and BS)
BS
BS
MS
MS
MS
RS
MS
MS
MS
Peer-to-peer data transmission
Example: P2P Support in Frame Structure
•
•
P2P zone is a time-frequency allocation in the sub-frame to enable MS and/or RS in
configurations with peer-to-peer communications
BS completely control P2P communication
– i.e., BS setup connection, select route, allocate resource for each P2P
Frame
DL
UL
TTG
FCH
MAP
Preample
Data
Data
P2P Zone
Fig. Example of P2P support in Frame Structure design