1. Power Save Mechanism for Unsync MPs
Month Year
doc.: IEEE yy/xxxxr0
January 2007
Power Save Mechanism for Unsync MPs
Date:
Authors:
Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures < ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE Working Group. If you have questions, contact the IEEE Patent Committee Administrator at
Kai Yang, Huawei Technologies Co., Ltd
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
January 2007
Abstract
This submission proposes a more efficient Power Save Mechanism for unsync MPs.
It is intended to resolve problems with the current Power Save Mechanism.
Kai Yang, Huawei Technologies Co., Ltd
John Doe, Some Company

3. PS mode in the current spec
Month Year
doc.: IEEE yy/xxxxr0
January 2007
PS mode in the current spec
According to P802.11s-D1.0 :
“A mesh point shall enter awake state prior to every TBTT that matches the mesh DTIM interval of its own or of its neighbor MPs with which it maintains a peer relationship.” [in clause 11A.9.6]
“A mesh point that entered the awake state due to the DTIM TBTT event and had not sent an ATIM, a broadcast frame, or a multicast frame, and did not receive a directed or multicast ATIM, a broadcast frame, or a multicast frame, may return to the Doze state following the end of the ATIM window.” [in clause 11A.9.6]
Kai Yang, Huawei Technologies Co., Ltd
John Doe, Some Company

4. Power Saving for unsync MPs
January 2007
Power Saving for unsync MPs
Example processing flow
Kai Yang, Huawei Technologies Co., Ltd

5. Power Saving for unsync MPs
January 2007
Power Saving for unsync MPs
Example processing flow
Kai Yang, Huawei Technologies Co., Ltd

6. Suggestions for PSM of Unsync MPs
January 2007
Suggestions for PSM of Unsync MPs
The ATIM window following the DTIM Beacon of an unsync MP should be a private window, and during this ATIM window, its neighbors shall transmit ATIM frames only to this MP. Therefore the window size may be smaller than the original one.
Unsync MPs transmit DTIM Beacon with TIM IE indicate the existence of the traffic buffered to neighboring MPs in PS mode, and they shall not transmit ATIM frames.
Neighboring MPs may return to doze state immediately after receiving the DTIM Beacon from an unsync MP if they have no traffic buffered to the unsync MP and the unsync MP indicates no traffic buffered to them via its TIM IE.
This is more efficient in power saving for MPs in PS mode.
Kai Yang, Huawei Technologies Co., Ltd

7. New Power Saving for unsync MPs
January 2007
New Power Saving for unsync MPs
Example processing flow
Kai Yang, Huawei Technologies Co., Ltd

8. New Power Saving for unsync MPs
January 2007
New Power Saving for unsync MPs
Example processing flow
Kai Yang, Huawei Technologies Co., Ltd

9. Month Year
doc.: IEEE yy/xxxxr0
January 2007
Reference
[1] “Some thoughts on potential issue in mesh operation” , IEEE /581r0
[2] “Some thoughts on power saving functionality” , IEEE /582r1
Kai Yang, Huawei Technologies Co., Ltd
John Doe, Some Company

10. Thank you for your attention!
January 2007
Thank you for your attention!
Kai Yang, Huawei Technologies Co., Ltd