IEEE C802.16m-09/1690
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Proposed Text of permutation for Multicarrier guard subcarriers (15.3.5.5)
Date
Submitted
2009-08-29
Source(s)
Jaehee Cho,
Voice:
E-mail:
+82-31-279-5596
jaehee1.cho@samsung.com
Samsung Electronics Co., Ltd.
416 Maetan-3, Suwon, 442-600, Korea
Re
IEEE 80216-09/0044
Abstract
The contribution proposes the text for permutation for Multicarrier guard subcarriers
Purpose
To be discussed and adopted by TGm for the 802.16m amendment.
Notice
Release
Patent
Policy
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represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion.
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Proposed Text of Multicarrier
for the IEEE 802.16m Amendment
Jaehee Cho
Samsung Electronics Co., Ltd.
1. Introduction
This contribution proposes the text of multicarrier to be included in the IEEE 802.16m amendment. The
proposed text is developed so that it can be readily combined with IEEE P802.16 Rev2/D7 [1], it is compliant to
the 802.16m SRD [2], 802.16m SDD [4] and it follows the style and format guidelines in [3].
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IEEE C802.16m-09/1690
2. Proposal in Multicarrier
The key proposal for multicarrier is as follows:

Guard subcarriers can be additional used for traffic transmission

ABS and AMS which are capable of accessing such subcarriers shall negotiate its capability through
SBC-REQ/RSP MAC management message

The additional guard subcarriers form PRUs which will be used as mini-band CRUs in frequency
partition ‘0’.

The number of available additional PRUs of each carrier is broadcast through MC-ADV broadcast
MAC management message. The number is not broadcast when default value is used.

The mini-band CRUs are not allocated alone. When an allocation includes last mini-band LRU in the
frequency partition ‘0’ the mini-band CRUs are implicitly allocated together and the actual LRUs
allocated to the allocation increase.
3. References
[1] IEEE P802.16 Rev2 / D7, “Draft IEEE Standard for Local and Metropolitan Area Networks: Air Interface
for Broadband Wireless Access,” Oct. 2008.
[2] IEEE 802.16m-07/002r6, “802.16m System Requirements”
[3] IEEE C802.16m-08/043, “Style guide for writing the IEEE 802.16m amendment”
[4] IEEE 802.16m-08/003r7, “The Draft IEEE 802.16m System Description Document”
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IEEE C802.16m-09/1690
4. Text proposal for inclusion in the 802.16m amendment
-------------------------------
Text Start
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15. Advanced Air Interface
15.3Physical layer
15.3.5.5 Downlink physical structure for multicarrier support
[Modify the test as follows in 15.3.5.5]
Guard subcarriers between carriers can be optionally used for traffic exchange. ABS and AMS negotiate whether they support
using guard subcarriers.
Following permutation and mapping are performed within a carrier. When there are multiple carriers, the same permutation and
mapping are performed per carrier. Guard subcarriers between carriers form integer multiples of PRUs. The structure of guard
PRU is the same as the structure defined in 15.3.5.1 and 15.3.5.4. The guard PRUs are used as miniband CRUs at partition FP0
for data transmission only. The number of useable guard subcarriers is predefined and should be known to both AMS and ABS
based on carrier bandwidth. PRUs in left and right edge of each carrier is signaled in MC-ADV MAC management message. Or
the following default configuration in table xxx is used when no information on the number of usable PRUs are included in
MC-ADV MAC management message. The total number of usable PRUs are SGMB.
BW
No. of PRUs
Left edge of carrier1)
Right Edge of carrier2)
5MHz
0
0
Table xxx Number available PRUs
10MHz
20MHz
1
1
2
2
7MHz
8.75 MHz
0
0
0
0
1) When a carrier occupies the left most spectrum among multiple contiguous carriers the usable PRUs in the left edge of carrier is zero.
2) When a carrier occupies the right most spectrum among multiple contiguous carriers the usable PRUs in the right edge of carrier is zero.
The SGMB PRUs are directly mapped to SGMB mini-band CRUs at partition FP0 without any permutation and the mini-band CRUs
are used only for data transmission. The mini-band CRUs from guard subcarriers are always allocated along with the last LRU of
mini-band CRU at partition FP0. In other words, when an allocation including the last LRU of mini-band CRU at partition FP0 is
made to an AMS and the AMS and ABS are capable of accessing additional PRUs the additional mini-band CRUs from guard
subcarriers are also allocated together.
The mapping to the mini-band CRUs from guard subcarriers are made after mapping to the last LRU of mini-band CRU at
partition FP0. Among the mini-band CRUs, the CRU having the lowest frequency is mapped first then the CRU having the
second lowest frequency is mapped. The mapping continues until the CRU having the highest frequency is mapped. Within the
mini-band CRU, subcarrier mapping is made as normal mini-band CRU.
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IEEE C802.16m-09/1690
15.3.6.5.4.2 DL basic assignment A-MAP IE
[Modify the test as follows at line 16 page 328 in 15.3.6.5.4.2 (At the end of “Determining the Resource Index for the
Scheduled Resource at the ABS”)]
…….
RI = Ia(S) + L, 1S24 and 0L23
The following is only applicable to AMS which is capable of processing additional PRUs (15.3.5.5 or 15.3.8.5). When RI of an
allocation to an AMS includes the last LRU of mini-band CRU at partition FP0 and the AMS and ABS are capable of processing
additional PRUs (15.3.5.5 or 15.3.8.5) SGMB LRUs of the additional mini-band CRUs are also allocated along with LRU of
mini-band CRU at partition FP0 indicated by the RI.
[Modify the test as follows at line 30 page 328 in 15.3.6.5.4.2 (At the end of “Determining the Scheduled Resource from the
Resource Index at the Receiver”)]
…….
L = RI – Ia(i)
The following is only applicable to AMS which is capable of processing additional PRUs (15.3.5.5 or 15.3.8.5). When RI of an
allocation to an AMS includes the last LRU of mini-band CRU at partition FP0 and the AMS and ABS are capable of processing
additional PRUs (15.3.5.5 or 15.3.8.5) the assigned resource size is SGMB + S where S is the value of element S in Ia with the
smallest value equal to or less than the index RI. The starting LRU for the allocation is determined in the same way:
L = RI – Ia(i)
15.3.8.5 Uplink physical structure for multicarrier support
[Modify the test as follows in 15.3.8.5]
Guard subcarriers between carriers can be optionally used for traffic exchange. ABS and AMS negotiate whether they support
using guard subcarriers.
Following permutation and mapping are performed within a carrier. When there are multiple carriers, the same permutation and
mapping are performed per carrier. Guard subcarriers between carriers form integer multiples of PRUs. The structure of guard
PRU is the same as the structure defined in 15.3.8.1 and 15.3.8.4 . The guard PRUs are used as miniband CRUs at partition FP0
for data transmission only. The number of useable guard subcarriers is predefined and should be known to both AMS and ABS
based on carrier bandwidth. PRUs in left and right edge of each carrier is signaled in MC-ADV MAC management message. Or
the following default configuration in table xxx is used when no information on the number of usable PRUs are included in
MC-ADV MAC management message.
The total number of usable PRUs are SGMB.
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IEEE C802.16m-09/1690
BW
No. of PRUs
Left edge of carrier1)
Right Edge of carrier2)
5MHz
0
0
Table xxx Number available PRUs
10MHz
20MHz
1
1
2
2
7MHz
8.75 MHz
0
0
0
0
1) When a carrier occupies the left most spectrum among multiple contiguous carriers the usable PRUs in the left edge of carrier is zero.
2) When a carrier occupies the right most spectrum among multiple contiguous carriers the usable PRUs in the right edge of carrier is zero.
The SGMB PRUs are directly mapped to SGMB mini-band CRUs at partition FP0 without any permutation and the mini-band CRUs
are used only for data transmission. The mini-band CRUs from guard subcarriers are always allocated along with the last LRU of
mini-band CRU at partition FP0. In other words, when an allocation including the last LRU of mini-band CRU at partition FP0 is
made to an AMS and the AMS and ABS are capable of accessing additional PRUs the additional mini-band CRUs from guard
subcarriers are also allocated together.
The mapping to the mini-band CRUs from guard subcarriers are made after mapping to the last LRU of mini-band CRU at
partition FP0. Among the mini-band CRUs, the CRU having the lowest frequency is mapped first then the CRU having the
second lowest frequency is mapped. The mapping continues until the CRU having the highest frequency is mapped. Within the
mini-band CRU, subcarrier mapping is made as normal mini-band CRU.
-------------------------------
Text End
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