1. 1 Power Saving Considerations for IEEE 802.16m Femtocell IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/1411 Date Submitted: 2008-10-31 Source: Ming-Hung Tao, Mamadou Kone, Ying-Chuan Hsiao, Richard Li E-mail: mhtao@itri.org.tw ITRI Venue: TGm call for contributions on IEEE 802.16m-08/040. Specific topic : “Support for Femtocells” Base Contribution: N/A Purpose: To be discussed and adopted by TGm. Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who 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 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. 2 Micro-sleep in femtocell Time zones –Because a femtocell supports only few MSs (no more than 10), the superframe in femtocell can be divided into several time zones, each zone can be either dedicated to a specific MS or public to all MSs. –MSs in active mode knows the distribution of time zones from the SFH, and monitor only its dedicated zones and public zones. –A time zone is composed by one or multiple sub- frames.

3. 3 Time zones in femtocell PublicBACBAC Super-frame SFH A Dedicated to MS A B Dedicated to MS B C Dedicated to MS C Public Pubic to all MSs

4. 4 Sleep mode in femtocell Sleep mode procedure (including timer, signaling) in femtocell is the same as in macrocell. During the MS listening interval/window, an MS first knows the zone distribution information from SFH, then checks the traffic indication from BS or transmits its data to BS only in its dedicated zones or public zones.

5. 5 Idle mode in femtocell A femtocell BS owns an unique paging group ID. The paging message for an MS in a femtocell is broadcast only in that femtocell only. When an idle-mode MS moves from a femtocell to another femtocell or macrocell, it will observe a different PG ID and perform location update. During paging listening interval, an idle-mode MS monitors only the public time zone for the paging message.