Resource allocation Bitmap in Group resource allocation Document

Resource allocation Bitmap in Group resource allocation Document Number: IEEE C 802. 16 m-09/1537 Date Submitted: 2009 -07 -06 Source: Jeongki Kim, Youngsoo Yuk, Sunam Kim, Seunghyun Kang, Ronny Yongho Kim E-mail: chegal@lge. com, sixs@lge. com, ronnykim@lge. com LG Electronics Re: Category: AWD comments / Area: Chapter 15. 2. 8 (Group Resource allocation) and Chapter 15. 3. 6 (DL-CTRL) “Comments on AWD 15. 2. 8 Group Resource Allocation and 15. 3. 6 DL-CTRL” Purpose: To be discussed and adopted in 802. 16 m AWD 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/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 >.

MCS/Burst size set • Link adaptation and resource allocation – Previous method • BS sends the MAPs including MCS and allocation size • MS can decode the burst and know the HARQ burst size based on the MCS and allocation size – Current AWD method • BS sends the MAPs including I_sizeoffset and allocation size • MS can find the MCS and HARQ burst size based on I_sizeoffset and allocation size and decode the HARQ burst. • Group configuration in GRA – Current method • Based on MCS set ID and HARQ burst size set ID

Group configuration based on I_sizeoffset • Parameters to be signaled – HARQ Burst Size set ID (same as current) – Range of I_sizeoffset • Minimum I_sizeoffset (4 bits) • Maximum I_sizeoffset (4 bits) – Difference of Spectral Efficiency (SED) • Spectral Efficiency : Modulation order (M) x effective code rate • Bits can be sent via one subcarriers • Good matching with required SINR for 10% PER • Advantages – Easy to design MCS set according to operator’s preference & HARQ burst size sets – Operators can find optimum SED value given RAB size • We can find optimum SED for specific HARQ burst size set and I_sizeoffset • For 4 bits RAB, optimum 16 combinations can be obtained • For 5 bits RAB, optimum 32 combinations can be obtained – Optimum SED value can be transmitted via ABI or predetermined (e. g. 0. 1, 0. 2. . )

Group configuration based on I_sizeoffset • Step 1: All possible combination set – Group configuration IE includes • I_sizeoffset information: Minimum I_size offset and Maximum I_sizeoffset • HARQ burst size set – AMS can get all possible allocation size based on I_sizeoffset and HARQ burst size set information – AMS configures the combination table , C(I_sizeoffset, HARQ burst size, Allocation size(NLRU)), as shown in Table 1. All possible combination set HARQ Burst Size Allocation size (NLRU) I_sizeoffset 0 1 … m (Highest value) 0 (lowest value) 0 (highest value) C(0, 0, 0) C(1, 0, 0) … C(m, 0, 0) 0 1 C(0, 0, 1) C(1, 0, 1) … C(m, 0, 1) … … … 0 a (lowest value) C(0, 0, a) C(1, 0, a) … C(m, 0, a) 1 0 (highest value) C(0, 1, 0) C(1, 0, 0) … C(m, 1, 0) 1 1 C(0, 1, 1) C(1, 1, 1) … C(m, 1, 1) … … … n (highest value) z (lowest value) C(0, n, z) C(1, n, z) … C(m, n, z)

Group configuration based on I_sizeoffset • Step 2: Effective combination set – AMS can easily know the spectral efficiency value (Modulation Value (M) * coding rate (R)) corresponding to all possible combinations as shown in table 2 • – SE (I_sizeoffset, HARQ burst size, N_LRU) Spectral efficiency value is used to reduce the RAB overhead • Group configuration IE includes “SE difference” – E. g. ) If 2 bits » 0 b 00: 0. 05, 0 b 01: 0. 1, 0 b 10: 0. 15, 0 b 11: 0. 2 Table 2. Spectral efficiency values for all possible combination set HARQ Burst Size Allocation size (NLRU) I_sizeoffset 0 1 … m (Highest value) 0 (lowest value) 0 (highest value) SE(0, 0, 0) SE(1, 0, 0) … SE(m, 0, 0) 0 1 SE(0, 0, 1) SE(1, 0, 1) … SE(m, 0, 1) … … … 0 a (lowest value) SE(0, 0, a) SE(1, 0, a) … SE(m, 0, a) 1 0 (highest value) SE(0, 1, 0) SE(1, 0, 0) … SE(m, 1, 0) 1 1 SE(0, 1, 1) SE(1, 1, 1) … SE(m, 1, 1) … … … n (highest value) z (lowest value) SE(0, n, z) SE(1, n, z) … SE(m, n, z)

Group configuration based on I_sizeoffset • Step 2: Effective combination set – For each HARQ burst size, • Initial SE: Lowest SE – E. g. ) SE (0, 0, 0), SE (0, 1, 0), ……, SE (0, n, 0) for each HARQ burst size (n) • Last SE: Highest SE – E. g. ) SE (m, 0, a), SE (m, 1, b), ……, SE (m, n, z) for each HARQ burst size (n) • For (i=Initial SE; i < last SE; i = Next SE) { – Next SE = MIN ({SE} >= i + SE difference) – {C(I, b, a )} -> U 1, if i < {SE (I, b, a)} < Next SE • } • Where – – b∈IB, I∈IM, a∈IA U 1: Useless combination set type 1 IM: Group I_Size. Offset IA: Group Allocation sizes (N_LRU), Depends on Group I_sizeoffset and Group HARQ burst size set – IB: Group HARQ burst size set – SE (I, b, a): Spectral efficiency value (M * R) for I_sizeoffset I, Allocation size(N_LRU) a, and HARQ data burst size b • Step 3: Effective combination set (E) = C- U 1

Example (1/3) • Assumptions – I_sizeoffset information • Minimum I_sizeoffset: 2, Maximum I_sizeoffset: 17 – HARQ burst sizes : 22, 31, 40, 50 bytes – SE difference: 0 b 01=0. 1 – Combination Set size : 27 5 bits Step 1 Step 2, 3

Example (2/3) • Assumptions – I_sizeoffset information • Minimum I_sizeoffset: 2, Maximum I_sizeoffset: 14 – HARQ burst sizes : 22, 40, 50 bytes – SE difference: 0 b 01=0. 1 – Combination Set size : 16 4 bits Step 1 Step 2, 3

Example (3/3) • Assumptions – I_sizeoffset information • – – – Minimum I_sizeoffset: 2, Maximum I_sizeoffset: 14 HARQ burst sizes : 22, 31, 40, 50 bytes SE difference: 0 b 01=0. 2 Combination Set size : 16 4 bits Step 1 Step 2, 3

Proposed AWD text Change #1 • 15. 3. 6. 5. 2. 5 Group Configuration A-MAP IE - Adopt the proposed text # 2 in CIEEE 802. 16 m-09_xxx or the latest revision of the contribution.

Proposed AWD text Change #2 • 15. 2. 8. 3. 3 Bitmaps in Group Resource Allocation Adopt the proposed text # 1 in CIEEE 802. 16 m-09_xxx or the latest revision of the contribution. -