Support of Dynamic Load-balancing between 16m and 16e in Uplink System - ( ) IEEE Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-09/2845 Date Submitted: Source: Jeongho Park, Jaeweon Cho, Hokyu Choi Voice: Samsung Electronics Co., Ltd. Venue: IEEE /0073, “IEEE Working Group Letter Ballot Recirc #30b: Announcement” Base Contribution: None Purpose: To be discussed and adopted by TGm 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. 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 Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and.

Support of Dynamic Load-balancing between 16m and 16e - Uplink System - Jeongho Park, Jaeweon Cho, Hokyu Choi, Samsung Electronics Co., Ltd. January 2010

About This Contribution Goal and scope of this contribution - Provide a proposal for dynamic load balancing in uplink systems between 16e and 16m Full flexibility for load balancing WITHOUT any additional signaling Maximum commonality in protocol between mixed and 16m only mode Proposal in this contribution - The required operation for dynamic load balancing BS side : Need to separate resources for 16e and 16m in scheduler MS side : Nothing different from normal operation (MS transparent) - The required change in the 16m draft spec Remove a step of referring subchannel bitmap signaling Add a renumbering step into subchannelization of 16m PUSC zone support 2

Initial Entry in Mixed Mode In Addition to Following information, - RNG channel resource location for initial ranging(S-SFH SP1) - TX power for initial ranging (S-SFH SP1 & 2) - Uplink subchannelization for RNG-REQ MSG(S-SFH SP1 & 2) AMS in Mixed Mode Need to know - What PUSC subchannels are assigned to 16m Before uplink subchannelization This brings high signaling overhead or initial entry latency Proposal can remove this necessity while still providing dynamic load balancing - Also can maximize protocol commonality btw mixed & 16m only mode 3

Proposal Renumbering index in reverse order in 16m - Control channel signaling format/protocol in 16m only mode can be applied to mixed mode - Dynamic load balancing could be done without any reference of signaling Resource Usage - Use of continuous PUSC index within each 16e and 16m Since PUSC subchannel provides full frequency diversity, it is okay - Assign from lowest index to 16e while highest index to 16m BS scheduling can change load balancing with full dynamics 4

Comparison in Concept 16m only 5 Mixed in D3Mixed Proposed Data HFBCH BW REQ CH FFBCH Logical resource index From 16m AMS perspective Data RNG CQI/ACK RNG Logical resource index From 16e MS perspective Logical resource index From 16m AMS perspective Signaling required Data RNG CQI/ACK HFBCH FFBCH BW REQ CH Logical resource index From 16e MS perspective Logical resource index From 16m AMS perspective HFBCH BW REQ CH FFBCH Signaling NOT required & BS can change dynamically 16e 16m 16e 16m Note that RNG channel for 16m would be assigned separately in 16m region. The figures do not show it, though.

Required Text Change in D3 (1/5) When supporting FDM based UL PUSC zone, UL subchannelization shall conform the following rules: 1) For the WirelessMAN-OFDMA system bandwidth, all usable subcarriers given in Table 878, Table 879, and Table 880 are divided into PUSC tiles. 2) UL PUSC subchannelization is performed as described in section >. 3) Available subchannels for Advanced Air Interface AMS shall be specified through subchannel bitmap broadcasted by [system descriptor, TBD]. 43) All PUSC tiles of specified subchannels from step 3 are extended in time domain from 3 OFDM symbols to Nsym OFDM symbols, where Nsym is dependent of AAI subframe type. 54) Based on specified subchannels of step 3 with symbol extension tiles of step 4, DRUs for Advanced Air Interface are made up. 65) Repeat step 4 and step 5 for remained OFDMA symbols of every uplink AAI subframe 6) Renumber the DLRU index in reverse order of PUSC subchannel index 6 Remedy 1: Change text from line 19 to 37 in page 510

Required Text Change in D3 (2/5) 7 Remedy 2: Change Figure 536 as follows:

Required Text Change in D3 (3/5) 8 UCAS_SB05/4/3See UL CRU/DRU allocation For 20 MHz, 5 bits For 10 MHz, 4 bits For 5 MHz, 3 bits UCAS_MB05/4/3See UL CRU/DRU allocation For 20 MHz, 5 bits For 10 MHz, 4 bits For 5 MHz, 3 bits UCAS_i3/2/1See UL CRU/DRU allocation For 20 MHz, 3 bits For 10 MHz, 2 bits For 5 MHz, 1 bits Remedy 2: Change text from line 51 to 64 in page 377 Remedy 3: Change text from line 33 to 36 in page 378 Ranging channel location in the frequency domain 3Indicate the start distributed LRU index for ranging channel. } else { UL_Permbase7Indicate UL_Permbase used in WirelessMAN-OFDMA system } else {

Required Text Change in D3 (4/5) 9 Remedy 4: Change text from line 55 to 59 in page 378 Ranging channel formats for non-synchronized AMSs 1Indicates the ranging channel formats number of Table 883 } UCAS_SB05/4/3See UL CRU/DRU allocation For 20 MHz, 5 bits For 10 MHz, 4 bits For 5 MHz, 3 bits UCAS_MB05/4/3See UL CRU/DRU allocation For 20 MHz, 5 bits For 10 MHz, 4 bits For 5 MHz, 3 bits UCAS_i3/2/1See UL CRU/DRU allocation For 20 MHz, 3 bits For 10 MHz, 2 bits For 5 MHz, 1 bits }

Required Text Change in D3 (5/5) applied. For the UL FDM mode, the default number of UL subchannels dedicated to WirelessMAN- OFDMA is X = max(8, ceil(35 x the number of DL AAI subframes dedicated to WirelessMAN-OFDMA / (total number of DL AAI subframes in a frame))), and the number of UL subchannels dedicated to Advanced Air Interface operations is Y = 35 - X. 10 Remedy 5: Change text from line 41 to 45 in page 312