Power Saving in MultiCarrier Operation IEEE 802 16

Power Saving in Multi-Carrier Operation IEEE 802. 16 Presentation Submission Template (Rev. 9) Document Number: IEEE C 802. 16 m-09/1015 r 1 Date Submitted: 2008 -04 -27 Source: Juhee Kim, Eunkyung Kim, Soojung Jung, Jaesun Cha, Kwangjae Lim, Hyun Lee, Chulsik Yoon E-mail: juhee@etri. re. kr ETRI Venue: Re: Category: AWD-New contribution /Area: Multi-Carrier Base Contribution: None Purpose: To be discussed and adopted by TGm for the 802. 16 m AWD 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: <http: //standards. ieee. org/guides/bylaws/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat >.

Background • Even in case that the ABS informs resource allocation only through the primary carrier, – the AMS shall receive and buffer the subframes on its active secondary carriers until decoding A-MAP. – AMS’s continuous monitoring the active secondary carriers comes with expense of wasteful power consumption. • A power management scheme should be considered for efficient power saving even in active/normal mode.

Background(cont’d) • When real-time traffic is transmitted with persistent allocation – The AMS may not need to monitor the control channel in every subframe. – In addition, if a secondary carrier is assigned only for real-time traffic, the AMS doesn’t need to listen to the secondary carrier in every subframe. – As the AMS can expect the next listening time, it can perform microsleep until the next listening time. • This can reduce power consumption and ease the sleep mode operation in multicarrier operation[1]. [1] IEEE 802. 16 m-09/0889, “Functional Details of Sleep Mode for Multi-carrier Operation in IEEE 802. 16 m”

Suggestion • Suggestion: A secondary carrier can be targeted to a certain set of service flows which serve real-time traffic. • For example, – If an AMS has multiple service flows for ‘real-time’ traffic and ‘BE’ traffic, and manages one primary carrier and one secondary carrier, – The ABS assigns the secondary carrier to serve the real-time traffic and the primary carrier to serve the BE traffic and control signaling. – When persistent allocation is used on the secondary carrier, the AMS can perform microsleep without explicit signaling during the interval where the resource is expected not to be allocated.

Proposed text Insert the following sentence into 15. 2. x. x. x Qo. S and Connection Management • The ABS may assign a specific set of the real-time service flows to a secondary carrier of the AMS. In this case, the ABS allocates resource only for the service flows on the secondary carrier. Insert the following sentence into 15. 2. x. x. x Power Management • The AMS may be assigned to a secondary carrier in order to serve only real-time traffic. In this case, if the persistent allocation is used for the AMS on the secondary carrier, the AMS may disable reception during the interval where no allocation is expected.