1. Path Selection and Path Switch Mechanism
Date:
Name
Compay
Address
Phone
Jiyoung Huh
LG Electronics
Yongho Seok
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2. Abstract
This proposal makes the Path Switch Request and Response more efficient and flexible by adding the reason and result of the path switch request in the frames related to path switch.
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3. The current Path Switch Mechanism
The Path Switch Request/Response frame cannot indicate why the path switch is requested and whether the request is acceptable or not AP
STA1
STA2 ① ③ ⑤
①: Direct Link
③+⑤: AP-Path
There may be several reasons for the request
Tx Path Switch Response (Link Identifier, Dialog Token, Path) ?
Rx Path Switch Response (Link Identifier, Dialog Token, Path)
Tx Path Switch Request (Link Identifier, Dialog Token, Path)
Rx Path Switch Request (Link Identifier, Dialog Token, Path)
There may be several reasons that cannot accept the request
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4. Suggestion
A STA that can know the link state requests the path switch including the information such as the reason for the request.
The STA receiving the request can decide whether the link should be changed or not based on the information included in the request and itself.
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5. Tx Path Switch Request/Response① ③ ⑤
①: Direct Link
③+⑤: AP-Path
RCPI1: RCPI of ⑤
RCPI2: RCPI of ① AP
STA1
STA2
Tx Path Switch Request
Tx Path Switch Response
Reason (1-Octet)
Path
Dialog Token
Link Identifier
Tx Path Switch Request
Tx Path Switch Response
Result (1-Octet)
Path
Dialog Token
Link Identifier
Rx Path Switch Request
Rx Path Switch Response
Result (1-Octet)
Path
Dialog Token
Link Identifier
Rx Path Switch Response
Rx Path Switch Request
Reason (1-Octet)
Path
Dialog Token
Link Identifier
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6. Conclusion
The reason field of path switch request frames allows the requested STA to decide whether the path should be changed or not.
The result field of path switch response frames allows the requested STA to indicate why the path switch is accepted or rejected and, if rejected, the requesting STA to know why the path switch is rejected.
Jiyoung et al.

7. Motion
Move to include normative text in document v-normative-text-for-path-selection-and-switch.doc into the TGz draft. Mover:
Seconder:
Result:
Jiyoung et al.