IEEE 802.16m-08/375r1 ProjectIEEE 802.16 Broadband Wireless Access Working Group TitleUplink Control Structure for RACH and PRCH.

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IEEE m-08/375r1 ProjectIEEE Broadband Wireless Access Working Group TitleUplink Control Structure for RACH and PRCH Date Submitted Source(s)Choong Il Yeh, Young Seog Song, Seung Joon Lee, Byung-Jae Kwak, Jihyung Kim, Wooram Shin, Dong Seung Kwon ETRI 161 Gajeong-dong Yuseong-gu, Taejeon , Korea Voice: (Choong Il Yeh) (Dong Seung Kwon) (Choong Il (Dong Seung Re:IEEE m-08/016r1: Call for Contributions on Project m System Description Document (SDD) ( ), Uplink Control Structures. AbstractProposed RACH and PRCH combines ranging and network-entry procedures together of the legacy system. PurposeAdoption of proposed text into SDD NoticeThis 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. ReleaseThe 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.

- 2 - IEEE m-08/375r1 Ranging and Network-entry Related UL CTRL Channels  Random Access Channel (RACH): combines ranging and network-entry together  Contention-based  Carries MAC information including MS MAC Address, etc.  Specific pilot pattern is defined to estimate channel as well as round-trip-delay  Long CP required to accommodate both maximum channel delay & round-trip-delay  MS transmits allocated subcarriers to RACH with long CP during two OFDM symbol periods.  Periodic Ranging Channel (PRCH)  Contention-free  Does not carry MAC information but just carry pilots to estimate round-trip-delay  Allocated Subcarrier Structure for RACH/PRCH Transmission

- 3 - IEEE m-08/375r1 Ranging with Pilots in the RACH and PRCH  Round-trip-delay estimation with two adjacent pilots P k and P k+1  Resource Allocation  RACH Consists of N 18-by-6 resource units and carries MAC information including MS MAC Address. N  14  3 data subcarriers and N  4  3 pilot subcarriers per RACH  PRCH PRCH consists of K two adjacent pilots (3  18)/(2  K) PRCHs per 18-by-6

- 4 - IEEE m-08/375r1 Text Proposal 11.xUL Control Structure 11.x.xRACH This is contention-based uplink channel containing MS MAC Address, etc. In order to estimate channel as well as round trip delay, special pilot pattern should be defined in the RACH. 11.x.xPRCH This is contention-free uplink channel consisting of pilots to support for MSs to measure and track the time-varying round trip delay caused by the movements of MSs.

- 5 - IEEE m-08/375r1References [1] IEEE m-07/002r4, “TGm System Requirements Document (SRD)” [2] IEEE m-08/003r1, “Draft IEEE m System Description Document” [3] IEEE m-08/004r1, “TGm Evaluation Methodology Document” [4] IEEE C802.16m-08/007, “Frame Structure for Relay and Femto Cell Support in TGm” [5] IEEE P802.16Rev2/D3