IEEE 802 16 m08375 r 1 Project IEEE

IEEE 802. 16 m-08/375 r 1 Project IEEE 802. 16 Broadband Wireless Access Working Group <http: //ieee 802. org/16> Title Uplink Control Structure for RACH and PRCH Date Submitted 2008 -05 -08 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 305 -700, Korea Re: IEEE 802. 16 m-08/016 r 1: Call for Contributions on Project 802. 16 m System Description Document (SDD) (2008 -03 -20), Uplink Control Structures. Abstract Proposed RACH and PRCH combines ranging and network-entry procedures together of the legacy system. Purpose Adoption of proposed text into 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 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: <http: //standards. ieee. org/guides/bylaws/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat>. Voice: +82 42 860 4895 (Choong Il Yeh) +82 42 860 5936 (Dong Seung Kwon) E-mail: ciyeh@etri. re. kr (Choong Il Yeh) dskwon@etri. re. kr (Dong Seung Kwon) 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.

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) ¡ ¡ ¦ IEEE 802. 16 m-08/375 r 1 Contention-free Does not carry MAC information but just carry pilots to estimate round-trip-delay Allocated Subcarrier Structure for RACH/PRCH Transmission -2 -

IEEE 802. 16 m-08/375 r 1 Ranging with Pilots in the RACH and PRCH ¦ Round-trip-delay estimation with two adjacent pilots Pk and Pk+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 -3 -

IEEE 802. 16 m-08/375 r 1 Text Proposal 11. x. x UL Control Structure RACH 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. x PRCH 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. -4 -

IEEE 802. 16 m-08/375 r 1 References [1] IEEE 802. 16 m-07/002 r 4, “TGm System Requirements Document (SRD)” [2] IEEE 802. 16 m-08/003 r 1, “Draft IEEE 802. 16 m System Description Document” [3] IEEE 802. 16 m-08/004 r 1, “TGm Evaluation Methodology Document” [4] IEEE C 802. 16 m-08/007, “Frame Structure for Relay and Femto Cell Support in TGm” [5] IEEE P 802. 16 Rev 2/D 3 -5 -