Text Proposal of PC-A-MAP IE Assignment in IEEE802.16 D4 (16.3.6) Document Number: IEEE C802.16m-10/xxxx+8 Date Submitted: 2010-02-22 Source: Yu-Hao Chang,

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Text Proposal of PC-A-MAP IE Assignment in IEEE D4 (16.3.6) Document Number: IEEE C802.16m-10/xxxx+8 Date Submitted: Source: Yu-Hao Chang, Yih-Shen Chen MediaTek Inc. Re: Base Contribution: None Purpose: Discussion and Approval 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 th e 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.

Outline Overview of implicit PC-A-MAP-IE indexing Drawback of the proposed scheme Proposed solution Text proposal

Overview of implicit PC-A-MAP-IE indexing Implicit indexing scheme was suggested in [1] PC-A-MAP assignment can be coupled with FFBCH assignment –Periodicity of PC-A-MAP-IE is controlled by that of FFBCH –Index of PC-A-MAP-IE is determined by FFBCH as suggested in [1]

Example of the implicit indexing scheme in FDD [1] ABS assigns FFBCH to AMS#1 in UL subframe#3 with 5ms –Then, PC-A-MAP is automatically assigned in DL #7 –Exact location in DL#7 is determined by the order of AMS#1’s FFBCH in UL subframe#3

Example of the implicit indexing scheme in H-FDD [1] In H-FDD systems, certain subframes can have limited transmission due to reception of SFH –Subframe #0, #1 and #7 are not used for UL transmission –Subframe #3, #4 and #5 are not used for DL transmission accordingly –Only Subframe #2 and #6 are used for both DL and UL transmission

Example of the implicit indexing scheme in TDD [1] In TDD Systems, –Total number of UL FFBCH per ‘frame’ should be same to total number of UL PC-A-MAP IE per ‘frame’ –In example, period of FFBCH 1 frame and 2 frame for MS#1 and MS#2 respectively

Problems of the implicit indexing scheme in FDD/H-FDD in [1] Resource usage is inefficient –When FFBCH periodicity is long, it is hard to guarantee that the number of MS in the system is invariant. Therefore, the system always reserves more resource for PC-A-MAP-IE even when the number of MS goes down later Power control command could be outdated –The power control command from PC-A-MAP-IE is generated based on the latest several feedback results. However, it is not applied till certain delay later in the current design and this latency will damage the effectiveness of power control command CQI report period is limited in some scenario –In H-FDD case, the CQI report periodicity should be carefully selected so that PC-A-MAP-IE will not happen in those time slots where uplink transmission takes place unless additional scheduling constraint is enforced

Proposed Assignment Rule In FDD/H-FDD/TDD systems, when ABS receives the FFBCH from AMS in i th frame, ABS will update the transmit power of that AMS in the (i+1) th frame based on the following reasons –Better control of resource usage –Fresher power offset information –CQI feedback periodicity is flexible –Simplicity in design Same assignment rule for FDD/H-FDD/TDD systems

Proposed Text : Remedy #1 For FDD/H-FDD/TDD systems, when FFBCH is assigned to AMS, the corresponding PC-A- MAP IE to the AMS automatically follows the assignment location defined in Table XX. In the table, s is defined as s = Q * m +q where N : total number of subframes in a frame (In TDD, N=D+U; In FDD/H-FDD, N=D=U) D : total available number of downlink subframes in a frame in TDD total available number of subframes in a frame in downlink carrier in FDD/H-FDD U : total available number of uplink subframes in a frame total available number of subframes in a frame in uplink carrier in FDD/H-FDD Q : total number of FFBCH given by Q = N fb *UL_FEEDBACK_SIZE – L HFB /3 where N fb is 3 in Mzone and 4 in Lzone with PUSC, and L HFB is the number of UL HARQ channels defined in S-SFH SP1 q : the channel index specified in Feedback Allocation A-MAP IE m : Available UL subframe index (0≤m≤U-1) T : total number of PC-A-MAP IE in downlink subframe, T = ceil(U*Q/D) Table XX- PC-A-MAP IE Location Frame indexSubframe indexChannel/IE index F-FBCH Locationi mq PC-A-MAP IE Location i + 1(floor(s/T)) mod Ns mod T Insert the following text, Table XX in line 50 of page 459 in IEEEP802.16m/D4

Proposed Text : Remedy #2 Change the line 23~24 in page 448 (Table 811) as Power control channel resource size indicator2Total number of PC-A-MAP IE, N PC-A- MAP-IE,is 0b00 : 0 (No Use of PC-A-MAP IE for UL power correction) 0b01 : 14 if UFPC is 0, or 24 0b10 : 28 if UFPC is 0, or 56 0b11 : 43 if UFPC is 0, or 86

Proposed Text : Remedy #3 Modify Text and Figure 522 in as below Power Control A-MAP Power Control A-MAP (PC-A-MAP) contains PC-A-MAP-IEs for closed-loop power control power correction of the uplink transmission. The ABS shall transmit PC-A-MAP-IE to every AMS which operates in closed-loop power control mode transmits FFBCH. The location of PC-A-MAP-IE is specified in Table XX. Figure 522 shows the construction procedure of PC-A-MAP symbols from PC-A-MAP-IE. The i th PC-A-MAP-IE shall have the size of 2 bits according to power correction value. The i th and (i+1) th PC-A-MAP IEs shall be mapped to two QPSK symbols as depicted in Figure 522. Only the i th PC-A- MAP may also be mapped to two QPSK symbols for transmitting to the corresponding MS with poor channel quality. Power scaling by sqrt(Pi) (0  i  N PC-A-MAP-IE ) shall be applied to the i th PC-A-MAP-IE where N PC-A-MAP-IE is the number of PC-A-MAP-IEs and sqrt(Pi) is the value determined by the management entity to satisfy the link performance. The QPSK symbols are repeated N rep,PC-A-MAP-IE times, where N rep,PC-A-MAP-IE equals two if A-A-MAP MCS selection field in SFH SP1 is 0b0, and four if A-A-MAP MCS selection field is 0b1. (x2) (x N rep,PC-A-MAP-IE )

Reference [1] IEEE m-09/2859r2, “Text proposal of PC-A-MAP-IE assignment in IEEE D3 ( )”, Jan. 2010