1. MAC Management Messages for Reliable Inter-BS Communication
January 2007
MAC Management Messages for Reliable Inter-BS Communication
IEEE P Wireless RANs Date:
Authors:
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Edward S. Zhang, Huawei Technologies

2. January 2007
Co-Authors:
Edward S. Zhang, Huawei Technologies

3. January 2007
Abstract
In the proposal “Connection Based Over-the-air Inter Base Station Communications” (IEEE /0111r1), there is no MAC management message design.
In this proposal, we design four MAC messages to facilitate the reliable inter-BS communication which is proposed in that proposal.
Edward S. Zhang, Huawei Technologies

4. General Description (1)
January 2007
General Description (1)
C-BS
S-BS
B-CPE
If S-BS (Service BS) wants to transmit self-coexistence information to C-BS (Coexist BS), it can first transmit this information to B-CPE (Bridge CPE) and assign B-CPE to communicate with C-BS.
B-CPE shall start to synchronize and communicate with C-BS.
B-CPE should synchronize with S-BS again and feed back a report.
Edward S. Zhang, Huawei Technologies

5. General Description (2)
January 2007
General Description (2)
Host BS
CPE
Request
Response
CPE communicates with the guest BS
Report
Acknowledgement
The mechanism is detailed in “Connection Based Over-the-air Inter Base Station Communications” (IEEE /0111r1),
Edward S. Zhang, Huawei Technologies

6. MAC Management Message Design
January 2007
MAC Management Message Design
To support inter-BS communication, four types of MAC management messages should be added to the MAC layer.
Type
Message
Description
Connection 60
BSS-REQ
Base station Switch Request
Primary Management
Multicast Management 61
BSS-RSP
Base station Switch Response 62
BSS-REP
Base station Switch Report 63
BSS-ACK
Base station Switch Acknowledgement
Edward S. Zhang, Huawei Technologies

7. January 2007
BSS-REQ
This message is sent by S-BS. CPEs who receive this message should begin to communicate with C-BS, which is indicated in the field of BS ID. This message may contain the CBP packet the S-BS wants to transmit to C-BS. This CBP packet is encapsulated into the field of Command.
Syntax
Size
Notes
BSS-REQ_Message_Format(){
Management Message Type = 60
8 bits
Transition ID
16 bits
BS ID
48 bits
MAC address which uniquely identifies the C-BS
Operational Channel
The operational channel of the C-BS. If the S-BS does not know the this channel index, this field is set to be 0x00.
Length
The length of this message
Confirmation Needed
1 bit
0 = No confirmation needed
1 = Confirmation needed
Command
variable
The format of this field is vendor-dependent. It can be used to convey BS commands or the information the S-BS wants to transmit to the C-BS. }
Edward S. Zhang, Huawei Technologies

8. January 2007
BSS-RSP
This message is sent by B-CPE in response to a BSS-REQ and serves to confirm the receipt of the BSS-REQ message.
Syntax
Size
Notes
BSS-RSP_Message_Format(){
Management Message Type = 61
8 bits
Transition ID
16 bits
Confirmation Code
Table 82 }
Edward S. Zhang, Huawei Technologies

9. January 2007
BSS-REP
This message is sent by B-CPE to S-BS after communicating with C-BS. It may contain the feedback the C-BS wants to transmit to S-BS. This feedback, if any, is encapsulated into the field of Report.
Syntax
Size
Notes
BSS-REP_Message_Format(){
Management Message Type = 62
8 bits
Transition ID
16 bits
Length
Report
variable
The format of this field is vendor-dependent. }
Edward S. Zhang, Huawei Technologies

10. January 2007
BSS-ACK
This message is sent by S-BS in response to a received BSS-REP.
Syntax
Size
Notes
BSS-RSP_Message_Format(){
Management Message Type = 63
8 bits
Transition ID
16 bits
Confirmation Code
Table 82 }
Edward S. Zhang, Huawei Technologies