Proposed PHY Structure for the IEEE 802.16m Bandwidth Request Channel Document Number: C80216m-09/0142 Date Submitted: 2009-01-05 Source: Yuan Zhu (yuan.y.zhu@intel.com) Xiangying Yang (xiangying.yang@intel.com) Qinghua Li (qinghua.li@intel.com) Changlong Xu (changlong.xu@intel.com) Jong-kae Fwu (jong-kae.fwu@intel.com) Hujun Yin (hujun.yin@intel.com) Intel Corporation Re: 802.16m-08/052, Call for Comments on 802.16m SDD (802.16m-08/003r6), Section 11.9.2.5 Venue: Base Contribution: N/A Purpose: Discussion and adoption by TGm Notice: This document does not represent the agreed views of the IEEE 802.16 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 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>. Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.
Overview In this contribution, we update our BRCH PHY structure design A 4×6 tile structure is proposed to support legacy mode operation A 6×6 tile size is proposed for green field operation 3-step quick access is supported for green field (6×6 tile size) operation with 5-step access as fall back The standard 5-step access (4×6 tile size) is always used for legacy mode of operation
PHY structure for green field 6×6 tile size: Preamble:Data = 2:1 24 orthogonal sequences, e.g. DFT sequences 12 bit message, block code (36, 12) and BPSK Non-coherent detection for preambles Coherent detection for message
PHY structure for legacy mode 4×6 tile size: Only transmit preambles 24 orthogonal sequences, e.g. DFT sequences
MAC Aspects Contention based access One BRCH carries 16 bits in total to convey MS ID and Bandwidth Request 4 bits is carried in preamble index 12 bits is carried in message part Enables 3-step quick access for 512 VoIP users, each user is able to carry 7 bits in quick access
Simulation Parameters Parameters Names Parameters Values Preamble:Data 2:1 Preamble Sequence DFT(24) Data Encoding Linear Block Code (36, 12) Data Modulation BPSK Data Decoding ML Preamble Detection Threshold for FA0.1% Only consider noise caused FA Data BLER Count misdetected preambles as error message. Count unreliable decoded message as error message. Only decode message for detected preambles Antenna 1Tx/2Rx
PB3 results 1% working point Preamble: -4.4dB Message 1User: 0.5dB
VA60 results 1% working point Preamble: -3.8dB Message 1User: 1dB
VA120 results 1% working point Preamble: -3.8dB Message 1User: 1dB
Conclusion For green field mode of operation, enable 3-step quick access and fall back to 5-step access if 3-step procedure is not successful. For legacy mode of operation, always use the standard 5-step access, similar to 802.16e. Adopt the tile structures in page 3 and page 4 for the IEEE 802.16m BRCH for green field and legacy operation respectively.