Backward Compatible FDD 802.16m Frame Structure for Full-Duplex and Half-Duplex MS Operations Document Number: S802.16m-08/031r2 Date Submitted: January.

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Backward Compatible FDD m Frame Structure for Full-Duplex and Half-Duplex MS Operations Document Number: S802.16m-08/031r2 Date Submitted: January 16, 2008 Source: Pei-Kai Liao I-Kang Fu, Chih-Yuan Lin, Ciou-Ping Wu Paul Cheng MediaTek Inc. No. 1 Dusing Rd. 1 Hsinchu Science Park Hsinchu City 300 Taiwan. Venue: Levi, Finland Base Contribution: IEEE C802.16m-08/031r1 Purpose: Propose to be discussed and adopted by TGm for the use in Project m SDD. 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. S802.16m-08/031r2

Introduction Motivation –In “Section 5.6 Duplex Schemes” of SRD, it says: IEEE m shall support both Time Division Duplex (TDD) and Frequency Division Duplex (FDD) operational modes. The FDD mode shall support both full- duplex and half-duplex MS operation. Specifically, a half-duplex FDD (H-FDD) MS is defined as an FDD MS that is not required to transmit and receive simultaneously. –FDD frame structure is not stated clearly in C802.16m-08/118r1, especially for legacy support –Some design ideas of TDD frame structure can be applied but not all –There are many discussions about FDD frame structure in WiMAX Forum, which means standard doesn’t provide clear description for it Purpose and Summary –Propose to be discussed and included in C802.16m-08/118r1 –FDD frame structure designs are proposed for both full-duplex and half-duplex MS operations

Full-duplex FDD Frame Structure for the Coexistence with FDD-based Legacy Systems Time length and channel bandwidth shown here is just an example One preamble per radio frame 16m preamble is shifted from legacy preamble by a fix number of OFDM symbols A radio frame is divided into two permutation zones Each permutation zone has its own MAP –MAP information of current zone determines resource allocation of next zone in uplink band –Contention channel Ranging channel is added for synchronization and channel estimation

Half-duplex FDD Frame Structure for the Coexistence with FDD-based Legacy Systems Time length and channel bandwidth shown here is just an example One preamble per radio frame Users are divided into three user groups to increase cell throughput –User group A –User group B –Legacy users Staggered sub-frame design is used to separate the downlink/uplink timing for user group A/B Each user group (A or B) has at least one DL/UP cycle in one radio frame

Proposed Text for Full-duplex MS Operation Details are referred to C802.16m-08/031r1

Proposed Text for Half-duplex MS Operation Details are referred to C802.16m-08/031r1