Relative Timing of Super-Frames in the Legacy-Support Mode IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-08/244.

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Relative Timing of Super-Frames in the Legacy-Support Mode IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-08/244 Date Submitted: Source: Sungho Moon and Jin Sam Kwak Voice: LG Electronic Inc. LG R&D Complex, 533 Hogye-1dong, Dongan-gu, Anyang, , Korea * Venue: Re : Proposed m Frame Structure Baseline Content Suitable for Use in the m SDD (C802.16m-08/118r1) Base Contribution: IEEE C802.16m-08/244 Purpose: Proposed m Frame Structure Baseline Content Suitable for Use in the m SDD (C802.16m-08/118r1) Notice: This document does not represent the agreed views of the IEEE 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 Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and.

Introduction DL to UL Ratio –Should be aligned between adjacent cells –Static configuration Mixed Ratio between 16e and 16m Sub-Frames –Can be different between adjacent cells –Dynamic and semi-static according to 16e and 16m loading Current Relative Timing btw. 16e and 16m Frames –Variable relative timing –Different starting point of 16m super-frame according to the mixed ratio between 16e and 16m sub-frames During handover procedures, there may be ambiguity problem in synchronization and acquisition of broadcasting information which should be located at the first sub-frame in 16m super-frame.

Variable Relative Timing

Fixed Relative Timing Candidates for the Fixed Relative Timing –Should reduce the number of zone switching points between 16e and 16m sub-frames For example, Best Choice of the Fixed Relative Timing –The start of the 16m super-frame should be DL sub-frame before the start of UL transmission.

Proposed Fixed Relative Timing Fixed Position of SFH –Aligned position between cells –Remove the ambiguity problem The Last DL Sub-Frame –Remove the multiple zone switching problem –Only one zone switching point in DL region

Proposed Text on C802.16m/118r Frame Structure Supporting Legacy Frames (proposal-1) The relative timing between the legacy and IEEE m radio frames shall be fixed. The relative start point of IEEE m TDD frame shall be the DL sub-frame before the start of UL transmission as shown in Figure Figure : Relative timing of the new and legacy radio frames (example TDD duplex scheme)  proposal-1