IEEE C802.16m-09/1317
1
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Proposed Update for the Draft P802.16m Amendment on the PHY Structure for BWREQ
channel
Date
Submitted
2009-07-06
Source(s)
Yuan Zhu, Xiangying Yang, Qinghua Li,
Changlong Xu, Jie Hui, Jong-Kae Fwu,
Hujun Yin
E-mail: (yuan.y.zhu, xiangying.yang, jongkae.fwu)@intel.com
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Re:
Category: AWD comments / Area: Chapter 15.3.9 (UL-CTRL) “Comments on AWD 15.3.9 ULCTRL” 802.16m amendment working document
Abstract
Proposed text for the PHY structure for UL control in the draft P802.16m amendment
Purpose
Discussion and adoption by TGm
Notice
Release
Patent
Policy
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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.
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.
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>.
Proposed Update for the Draft P802.16m Amendment on the PHY
Structure for BWREQ Control
Yuan Zhu, Xiangying Yang, Qinghua Li, Changlong Xu, Jie Hui, Jong-Kae Fwu, Hujun Yin
Intel
Introduction
This contribution provides updated amendment text for the BWREQ channel Structure in the Advanced Air
Interface to be included in Section 15 of the IEEE 802.16m Amendment Working Document [1]. The proposed
update is developed so that it can be readily combined with IEEE 802.16m-09/0010r1 [1], it is compliant to the
802.16m SRD [2] and the 802.16m SDD [3], and it follows the style and format guidelines in [4]. The related
simulation results is in [5].
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IEEE C802.16m-09/1317
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Proposed AWD text has been underlined in blue, AWD text that has been deleted has been marked in red and
struck through and existing AWD text is shown in black.
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References
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[1] IEEE 802.16m-09/0010r1, “Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access
Systems,” March. 2009.
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[2] IEEE 802.16m-07/002r8, “IEEE 802.16m System Requirements Document”
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[3] IEEE 802.16m-08/003r8, “IEEE 802.16m System Description Document”
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[4] IEEE 802.16m-08/043, “Style guide for writing the IEEE 802.16m amendment”
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[5] IEEE 802.16m-09/1316, “BWREQ updated link chain|”
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Proposed Amendment Text
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The following text is proposed for inclusion in Section 15 of the IEEE 802.16m Amendment Working
Document [1].
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[
------------------- Proposed Text Starts --------------------]
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15.3.9.1.5 Bandwidth request Channel
In the LZone with PUSC, a BW REQ tile is defined of four 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 only.
In the MZone, 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 access sequence and
a BW REQ message. The AMS may transmit the access sequence only and leave the resources for quick access
message unused.
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IEEE C802.16m-09/1317
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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Figure 1: 6x6 BW REQ Tile Structure in the Advance Air Interface
A BW REQ tile in the Advanced Air Interface specifications is defined as 6 contiguous subcarriers by 6 OFDM
symbols. As shown in Figure 1, 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 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 defined in
section XXXX.
Let b0b1b2 ...b15 denote a total of 16 bits of information which can be carried in the quick access message. 4 bits
of 16 information bits shall be carried in the BW REQ preamble using the preamble index. The combined
resource in the data portions 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 6×6 tile structure is TBD.
Figure 2 illustrates the construction of the BW REQ preamble and quick access message for a 6x6 tile structure.
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IEEE C802.16m-09/1317
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4 bits
Bandwidth
Request
Message
72 BW REQ CH
Preamble
symbols
Sequence
Selection
Scrambling
Mtuliplexing&
Normalization
108 BW
REW CH
symbols
36 BW REQ CH
Data symbols
12 bit Bandwidth
Request Message
Randomizer
CRC6
Channel
encoding (1/
4 TBCC)
Modulation
(QPSK)
×
Scrambling
αd
2
3
Figure 2: Bandwidth Request Channel structure with 6x6 tiles
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The logical preamble sequence index, BWREQ_PREAMBLE_INDEX, which is configured by the upper layer
and 4 bits of the bandwidth request message shall be used to select three sequences of length 24 from Table 1 in
order to construct 72 preamble symbols. As shown in Figure 2 , the 72 preamble symbols shall be scrambled
before multiplexing with data symbols in the BW REQ channel.
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Table 1: BW REQ channel Preamble sequences
pu (k ), 0  k  24
u
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
10
11
12
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
1
1
1
1
1
1
1
1
1
1
1
1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
1
1
-1
1
1
1
-1
-1
-1
1
-1
1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
-1
-1
1
1
-1
1
1
1
-1
-1
-1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
1
1
-1
1
1
1
-1
-1
-1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
1
-1
-1
1
-1
1
1
-1
1
1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
-1
-1
-1
1
-1
1
1
-1
1
1
1
-1
1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
-1
-1
-1
-1
1
-1
1
1
-1
1
1
1
1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
-1
1
-1
-1
-1
1
-1
1
1
-1
1
1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
1
1
-1
1
The preamble sequences transmitted in the three BW REQ tiles of a BW REQ channel are defined as
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1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
1
1
1
-1
-1
-1
1
-1
1
1
-1
1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
-1
-1
1
1
1
-1
-1
-1
1
-1
1
1
1
-1
1
-1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
1
1
1
-1
-1
-1
1
-1
1
IEEE C802.16m-09/1317
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Prn,24mk  pum (k), 0  k  24, 0  m  3, 0  um  24
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3
4
where n is BW REQ channel index, k is symbol index in the preamble portion of a BW REQ tile, m is
BW REQ tile index, um is sequence index in BW REQ tile m .
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The mapping between the combination of the logical preamble sequence index, BWREQ_PREAMBLE_INDEX
and the 4 bits of the bandwidth request message b12b13b14b15 to the physical preamble index, um ,0  m  3 is as
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below equation.
um,=mod( BWREQ_PREAMBLE_INDEX+ bin2dec( b12b13b14b15 ), 24)
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The 12 bits of information in the quick access message transmitted in the BW REQ channel shall be appended
with 6 bits CRC using generating polynomial x 6  x  1 and encoded into 72 bits c0 , c1 , c2 , c71 using the 1/64
TBCC code described in section XXX with parameters ( L  18 , K bufsize  72 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 ,...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 3, only the BW REQ access sequence or BW REQ preamble shall be
transmitted in 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, as shown in Figure 4.
Time
Frequency
Prn,0
Prn,1
Prn,2
Prn,3
Prn,4
Prn,5
Prn,6
Prn,7
Prn,8
Prn,9
Prn,10
Prn,11
Prn,12
Prn,13
Prn,14
Prn,15
Prn,16
Prn,17
Prn,18
Prn,19
Prn,20
Prn,21
Prn,22
Prn,23
Prn,24
Prn,25
Prn,26
Prn,27
Prn,28
Prn,29
Prn,30
Prn,31
Prn,32
Prn,33
Prn,34
Prn,35
Prn,36
Prn,37
Prn,38
Prn,39
Prn,40
Prn,41
Prn,42
Prn,43
Prn,44
Prn,45
Prn,46
Prn,47
Prn,48
Prn,49
Prn,50
Prn,51
Prn,52
Prn,53
Prn,54
Prn,55
Prn,56
Prn,57
Prn,58
Prn,59
Prn,60
Prn,61
Prn,62
Prn,63
Prn,64
Prn,65
Prn,66
Prn,67
Prn,68
Prn,69
Prn,70
Prn,71
23
24
Figure 3: 4x6 BW REQ tile structure
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IEEE C802.16m-09/1317
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Random
Sequence
Selection
2
3
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72 BRCH
Preamble
symbols
Scrambling
Figure 4: 4x6 Bandwidth Request Channel structure with 4x6 tiles
[
------------------- Proposed Text Ends --------------------]
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