IEEE C802.16m-09/1548 Project IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16> Title Proposed PHY structure of Bandwidth Request Channel for IEEE 802.16m Amendment Text Date Submitted 2009-07-06 Source(s) Hwasun Yoo, Kaushik Josiam, +82-31-279-4983 Min-Ho Jang, Heewon Kang hwasun.yoo@samsung.com Samsung Electronics Co., Ltd. Re: 802.16m amendment working document Abstract The contribution proposes the text of BW REQ channel to be included in the 802.16m amendment. Purpose To be discussed and adopted by TGm for the 802.16m amendment. Notice Release Patent Policy 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. 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Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat>. 1 IEEE C802.16m-09/1548 Proposed PHY structure of Bandwidth Request Channel for IEEE 802.16m Amendment Text Hwasun Yoo, Kaushik Josiam, Min-Ho Jang, Heewon Kang Samsung Electronics Co., Ltd. 1. Introduction The contribution proposes the text on the physical layer structure of the Bandwidth Request Channel to be included in the 802.16m amendment ([1]). The proposed text is developed so that it can be readily combined with IEEE P802.16 Rev2/D8 ([2]), it is compliant to the 802.16m SRD ([3]) and the 802.16m SDD ([4]), and it follows the style and format guidelines in ([5]). 2. References [1] IEEE 802.16m-09/0010r2, “802.16m Amendment Working Document (AWD)” [2] IEEE P802.16 Rev2/D8, “Draft IEEE Standard for Local and Metropolitan Area Networks: Air Interface for Broadband Wireless Access,” Dec. 2008. [3] IEEE 802.16m-07/002r7, “IEEE 802.16m System Requirements Document” [4] IEEE 802.16m-08/003r6, “IEEE 802.16m System Description Document” [5] IEEE 802.16m-08/043, “Style guide for writing the IEEE 802.16m amendment” 2 IEEE C802.16m-09/1548 3. Text proposal for inclusion in the 802.16m amendment ---------------------------------------- Text Proposal #1 Start --------------------------------------------------Replace section 15.3.9.1.5, page 286-288 with the following text: 15.3.9.1 Physical Uplink Control Channel 15.3.9.1.5 Bandwidth Request Channel In the L-Zone with PUSC, a BW REQ tile is defined as gour contiguous subcarriers by six OFDM symbols. The number of BW REQ tiles per BW REQ channel is three or six. Each BW REQ tile carries a BW REQ access sequence preamble only as shown in Figure 502. In the M-Zone, a BW REQ tile is defined as six contiguous subcarriers by six OFDM symbols. Each BW REQ channel consists of three distributed BW-REQ tiles. Each BW REQ tile carries a BW REQ accesss sequence preamble and part of a BW REQ message as shown in Figure 501.. The AMS may transmit the access sequence preamble only and leave the resources for the quick access BW REQ message unused. Time Frequency Prn,0 Prn,1 Mn,0 Mn,1 Prn,2 Prn,3 Prn,4 Prn,5 Mn,6 Mn,7 Prn,6 Prn,7 Prn,8 Prn,9 Mn,12 Mn,13 Prn,10 Prn,11 Prn,12 Prn,13 Mn,18 Mn,19 Prn,14 Prn,15 Prn,16 Prn,17 Mn,24 Mn,25 Prn,18 Prn,19 Prn,20 Prn,21 Mn,30 Mn,31 Prn,22 Prn,23 Prn,24 Prn,25 Mn,2 Mn,3 Prn,26 Prn,27 Prn,28 Prn,29 Mn,8 Mn,9 Prn,30 Prn,31 Prn,32 Prn,33 Mn,14 Mn,15 Prn,34 Prn,35 Prn,36 Prn,37 Mn,20 Mn,21 Prn,38 Prn,39 Prn,40 Prn,41 Mn,26 Mn,27 Prn,42 Prn,43 Prn,44 Prn,45 Mn,32 Mn,33 Prn,46 Prn,47 Prn,48 Prn,49 Mn,4 Mn,5 Prn,50 Prn,51 Prn,52 Prn,53 Mn,10 Mn,11 Prn,54 Prn,55 Prn,56 Prn,57 Mn,16 Mn,17 Prn,58 Prn,59 Prn,60 Prn,61 Mn,22 Mn,23 Prn,62 Prn,63 Prn,64 Prn,65 Mn,28 Mn,29 Prn,66 Prn,67 Prn,68 Prn,69 Mn,34 Mn,35 Prn,70 Prn,71 Figure 501- 6X6 BW REQ Tile Structure in the Advanced Air Interface 3 IEEE C802.16m-09/1548 frequency time P4 P8 P12 P16 P20 P1 P5 P9 P13 P17 P21 M0 M6 M12 M18 M24 M30 M1 M7 M13 M19 M25 M31 P2 P6 P10 P14 P18 P22 P3 P7 P11 P15 P19 P23 P0 P4 P8 P12 P16 P20 P1 P5 P9 P13 P17 P21 M2 M8 M14 M20 M26 M32 M3 M9 M15 M21 M27 M33 P2 P6 P10 P14 P18 P22 P3 P7 P11 P15 P19 P23 P0 P4 P8 P12 P16 P20 P1 P5 P9 P13 P17 P21 M4 M10 M16 M22 M28 M34 M5 M11 M17 M23 M29 M35 P2 P6 P10 P14 P18 P22 P3 P7 P11 P15 P19 P23 ... P0 ... Figure 501 6X6 BW REQ Tile Structure in the Advanced Air Interface A BW REQ tile in the Advanced Air Interface specifications is defined as 6 contiguous subcarriers by 6 OFDM symbols as Figure 501, where P0 , P1 , , P23 and M 0 , M1 , , M 35 indicate BW REQ preamble sequence and BW REQ message, respectively. As shown in Figure 501, the BW REQ preamble shall be transmitted on a resource that spans 4 subcarriers by 6 OFDM symbols. Additionally a quick access BW REQ message shall may be carried in the data portion of the tile that spans 2 contiguous subcarriers by 6 OFDM symbols. Each BW REQ channel shall comprise of 3 distributed BW REQ tiles for frequency diversity. The procedure for allocation of resources for transmission of UL control information and the formation of DRUs for such transmission is TBD. 4 IEEE C802.16m-09/1548 Let b0 , b1 , b2 , , b15 denote a total of 16 bits of information to be carried as the quick access message. 4 bits of the 16 information bits shall be carried in the BW REQ preamble using the preamble index. The combined resource in the data portion of the three tiles that form the BW REQ channel shall be used to transmit the remaining 12 bits of information. The construction of the BW REQ preamble for a 6x6 tile structure is TBD. The 12 bits of information in the quick access message transmitted in the BW REQ channel shall be encoded into 72 bits c0 , c1 , c2 , , c71 using the 1/6 TBCC code described in <<< section 15.3.9.2.1.2 (Channel coding for secondary fast feedback channel)>> with paramters L 12 , K bufsize 60 and M 72 . The 72 coded bits shall then be QPSK modulated as described in Section TBD and scrambled to generate 36 data symbols, v0 , v1 , v2 , , v35 . The combined data portions of the three distributed BW REQ tiles that form the BW REQ channel shall be used to transmit these data symbols. In order to support operation in the legacy mode, a BW REQ tile shall be defined as 4 contiguous subcarriers by 6 OFDM symbols. As shown in Figure 502, only the BW REQ access sequence or BW REQ preamble shall be transmittedin all 24 subcarriers that form the BW REQ tile. In this case, the BWREQ _ PREAMBLE _ INDEX shall be randomly selected from all available logical preamble sequences. ---------------------------------------- Text Proposal #1 End --------------------------------------------------- ---------------------------------------- Text Proposal #2 Start --------------------------------------------------Replace section 15.3.9.2.5, page 295 with the following text: 15.3.9.2 Uplink Control Channels Physical Resource Mapping 15.3.9.2.5 Bandwidth request channel Contention based random access is used to transmit bandwidth request BW REQ information on this control channel. The bandwidth request (BW REQ) channel contains resources for the AMS to send a BW REQ access sequence and an optional quick access message. Prioritized bandwidth requests are supported on this channel. The mechanism for such prioritization is TBD. Both 3-step and 5-step BW REQ procedures described in <<Section 15.2.2 >> are supported on this channel. When the type of bandwidth requested by an AMS is not one of urgent bandwidth request types defined in <<Section 15.x>>, the AMS randomly chooses a preamble index k with a range from 0 to 23. The selected preamble index is used for generating BW REQ preamble sequence according to Table XXX. Index k BW REQ preamble sequence Index k BW REQ preamble sequence 0 111111111111111111111111 12 111111111111000000000000 1 101011100010101011100010 13 101011100010010100011101 5 IEEE C802.16m-09/1548 2 100101110001100101110001 14 100101110001011010001110 3 110010111000110010111000 15 110010111000001101000111 4 101001011100101001011100 16 101001011100010110100011 5 100100101110100100101110 17 100100101110011011010001 6 100010010111100010010111 18 100010010111011101101000 7 110001001011110001001011 19 110001001011001110110100 8 111000100101111000100101 20 111000100101000111011010 9 111100010010111100010010 21 111100010010000011101101 10 101110001001101110001001 22 101110001001010001110110 11 110111000100110111000100 23 110111000100001000111011 For 3step BW REQ procedure, 15bits of BW request information is constructed from 12bits of STID and 3bits of pre-defined BW size information, which is decribed in Section (15.X). Let s0 , s1 , s2 , , s11 and q0 , q1 , q2 denot e the STID and pre-defined BW size information, respectively. By reordering the bits of STID and pre-defined BW size information, 15bits of BW request information is formed as b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14 s0 s1s2 s3s4 s5 s6 s7 s8 s9q0q1q2 s10 s11 ---------------------------------------- Text Proposal #2 End --------------------------------------------------- 6