Sounding Antenna Switching for IEEE 802.16m Amendment Working Document IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-0848 Date Submitted: 2009-04-27 Source: KeunChul Hwang, Yongseok Kim, Seungwon Kang, Inseok Hwang, Soon Young Yoon keunchul.hwang@samsung.com Samsung Electronics Venue: IEEE 802.16m Session#61, Cairo, Egypt Base Contributions: N/A Re: Call for Contributions on Project 802.16m Amendment Working Document (AWD) Content Purpose: To discuss and adopt in 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 >.

Motivation In current AWD text(80216m-09_0010r1a), sounding antenna switching is determined to be supported, but the details is TBD. This contribution intends to specify the details for supporting sounding antenna switching

Simulation Parameters Assumption Cell Configuration Hexagonal grid, 19 Cell sites, 3 sectors per site Path loss model Loss (dB) = 130.19 + 37.6log10(R) (R in km) Site-to-Site Distance 1.5 km Carrier Frequency 2.5 GHz Bandwidth 10Mhz BS Tx Power 46dBm BS Tx / MS Rx antenna 4Tx (ULA 4 ) / 2 Channel Model SCM Urban Macro 3km/h Sounding Multiplexing CDM (P = 18) Multi target PC ON (4 class) Number of Simultaneous Sounding User Per Sector 4 Number of Users Per Sector 16 Sounding Channel Delay for generating ZF weighting Single antenna(1Tx) : 1 frame delay for fixed single antenna Multi antenna(2Tx) : 1 frame delay for 2 antenna Antenna switching : 1frame delay for one antenna and 2 frame delay for another antenna

Simulation Results DL MIMO performance according to sounding antenna configuration DL 4 x 2 ZF MU-MIMO with sounding Sector Throughput Enhancement Single Antenna (1Tx) Sounding 100 % (ref.) Multi Antenna (2Tx) Sounding 112 % Antenna Switching Sounding 114 %

Proposed Antenna Switching Proposed Text and Operation Example Text: When the number of AMS’ antennas is T and the number of AMS RF Tx chain is R, AMS should transmit the sounding signal with antenna switching during the consecutive T/R frames starting from every periodic frame corresponding to periodicity and sounding relevance. At the ith (i = 0,1, … , T/R1) frame out of the consecutive T/R frames, the index of antenna of MS for sounding transmission is chosen as: from ‘(i☓R)’ to ‘((i☓R) + R1)’. For periodic sounding allocation, BS should set the periodicity larger than or equal to T/R. Operation Example T = 2, R = 1, Sounding periodicity = 4

Proposed Remedy Adopt the following proposed text in line 9, page 119 (section 15.3.9.2.3.2. in 80216m-09_0010r1a) 15.3.9.2.3.2 Multiplexing for multi-antenna and multi-AMS The uplink sounding channels of multiple AMS and multiple antennas per AMS can be multiplexed through [Option 1: decimation separation or cyclic shift separation][Option2: decimation separation] in each sounding allocation. Also, in case of multiple UL subframes for sounding, time division separation can be applied by assigning different AMS to different UL subframe. For cyclic shift separation each AMS occupies all subcarriers within sounding allocation and uses the different sounding waveform [Editor's note: remove this sentence if Option 2 will be adopted]. For frequency decimation separation each AMS uses decimated subcarrier subset from the sounding allocation set with different frequency offset. For antenna switching capable AMS, ABS can command the AMS to switch the physical transmit antenna(s) for sounding transmission. The details for supporting antenna switching on sounding is TBD. When the number of AMS’ antennas is T and the number of AMS RF Tx chain is R, AMS should transmit the sounding signal with antenna switching during the consecutive T/R frames starting from every periodic frame corresponding to periodicity and sounding relevance. At the ith (i = 0,1, … , T/R1) frame out of the consecutive T/R frames, the index of antenna of MS for sounding transmission is chosen as: from ‘(i☓R)’ to ‘((i☓R) + R1)’. For periodic sounding allocation, BS should set the periodicity larger than or equal to T/R. 6