Frame Structure for Talk-around Direct Communications Document Number: IEEE S802.16n-11/0130 Date Submitted: Source: Young-Ho Jung, Jihoon Choi Korea Aerospace University Sungcheol Chang, Eunkyung Kim, Sungkyung Kim, Won-Ik Kim, Miyoung Yun, Hyun Lee, Chulsik Yoon, Kwangjae Lim ETRI Re: Call for comments on the n AWD Base Contribution: IEEE C802.16n-11/0130r1 Purpose: To be discussed and adopted by TGn 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. Copyright Policy: The contributor is familiar with the IEEE-SA Copyright Policy. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and..html#6sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat Introduction Resource allocation for TDC (talk-around direct communication) Some resources for infra-structure communication are reserved for TDC in the FDM (frequency division multiplexing) manner. Common Direct Mode Zone (CDMZ): 4 PRUs having highest indices of uplink resources (72 contiguous subcarriers in the frequency domain, see IEEE C802.16n-11/0051r2)IEEE C802.16n-11/0051r2 Cell Specific Direct Mode Zone (CSDMZ): determined by each HR-BS independently (UL or DL resource) Frame structure for TDC CDMZ: The resources assigned for CDMZ are composed of Sync-CH (synchronization channel), Ded-CH (dedicated channel), and Sup-CH (supplementary channel). CSDMZ: FFS 2 Resource Allocation for TDC 3 Common Direct Mode Zone (CDMZ): set of PRUs with fixed size and positions which are commonly assigned to all cells (must be CRU) Cell Specific Direct Mode Zone (CSDMZ): additionally assigned direct-mode resource blocks independently assigned by each HR-BS (CRU or DRU) and information to receive cell specific direct mode region can be obtained from common direct mode zone Construction of TDC frame (CDMZ) Example. 3 uplink subframes/ 5msec frame Synchronization Channel (Sync-CH): 1 st subframe of each superframe Dedicated Channel(Ded-CH): 1 st subframe of the 2 nd and 4 th frame Supplementary Channel(Sup-CH): the other subframes 4 A B A Sup-Ch for slot 2 Ded-Ch B Sup-Ch for slot 1 Ded-Ch PHY Channels for TDC Synchronization Channel (Sync-Ch) Includes 6 OFDM symbols (1 st subframe of each superframe) The Sync-CH uses 72 contiguous subcarriers in the frequency domain In the time domain, first three symbols are used for the Sync-CH preamble and last three symbols are used for the Sync-CH message See IEEE C802.16n-11/0131 for more details 5 PHY Channels for TDC Dedicated Channel(Ded- Ch) Dedicated sub-channel: set of 9 mRBs allocated across all assigned PRUs in the same slot (to obtain freq. diversity) mRB (mini Resource Block): 6 subcarriers x 6 OFDM symbols Transmit data packets and control packets See IEEE C802.16n- 11/0132 for more details 6 mRBs for Ded-Ch PHY Channels for TDC Supplementary Channel (Sup-Ch) Supplementary sub-channel: set of 2 half-mRBs in the same subframe Half-mRB: 3 subcarriers x 5 OFDM symbols (6 th OFDM symbol is empty symbol (guard time) for Tx. Rx. switiching time Sup-Ch for Ded-Ch in slot 1 exists in slot 2, and Sup-Ch for Ded-Ch in slot 2 exists in slot 1 (1:1 correspondence between a supplementary sub-channel and a dedicated sub-channel) Transmits MAC messages, PHY signalings and short feedback messages related with the corresponding dedicated sub-channel MAC messages: RTS, CTS, MCS information, ranging response et. al. PHY signalings: periodic ranging sequence, sounding signal et. al. Short feedback messages: ACK, NACK, CQI, CSI, RI (rank information) et. al. See IEEE C802.16n-11/0132 for more details 7 Proposed Text See IEEE C802.16n-11/0130 8