1. Clarification for Staggered Super-frame Transmissions in the SDD Document Number: IEEE C802.16m-08/854 Date Submitted: 2008-7-14 Source: Richard Li, Chun-Yen Wang, Chien-Ming Chou Voice: ITRIE-mail: richard929@itri.org.tw Information and Communications Research Laboratories, 195 Chung Hsing Rd., Sec.4 Chu Tung, Hsin Chu, Taiwan 310, R.O.C. * http://standards.ieee.org/faqs/affiliationFAQ.html Venue: Re : Reply comment to IEEE 802.16m-08/024 - Call for Comments and Contributions on Project 802.16m System Description Document (SDD) - Call for Comments on IEEE 802.16m-08/003r3 Base Contribution: IEEE C802.16m-08/854 Purpose: To be discussed and adopted by TGm for the 802.16m SDD 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. Staggered Super-frame Transmissions Basic idea

3. An example of Cell Planning Neighbor cells have staggered super- frame transmissions

4. Benefits of Staggered Super-frame Transmissions More opportunities are provided while multiple BSs’ signals/information need to be received and processed. This could be helpful for shorten latency of HO measurement and/or procedure. Staggered super-frames could provide MSs to have chance switching between sourcing BSs for acquiring signals/information in an efficient manner.

5. Instances of Staggered Super-frame Concept Staggered preambles between neighbor BSs Stagger SFH, which does not include preamble –Staggered Primary BCH + Secondary BCH –Staggered Secondary BCH, in case of PBCH transmitted by SFN Staggered super-frame transmission between different carrier frequencies –C80216m-08_695r2

6. Proposed modification of the current text in SDD 11.4.7 Staggered super-frame transmissions The start of super-frames between neighbor 802.16m cells may be staggered by one-frame increments. Figure 25 illustrates the concept of staggered super-frames in a TDD system, where staggering of super-frames is applied to a cluster of 4 neighboring BSs, BS1-BS4. In the figure, BS #1, #2, #3, and #4 transmit 20ms super-frames periodically and the super-frame timing between four BSs are offset one frame in order from #1 to #4. The cluster size for staggered super-frames is a network-configurable parameter and can range from 1 to 4. This allows for the option of a deployment with non- staggered super-frames, such as might be the case for MBSFN transmissions or other scenarios, depending on the requirements. The concept of staggered super-frame transmissions across neighboring cells is equally applicable to FDD systems.