the pru configuration for bw aggregation document number: ieee c802.16m-08/802r3 date submitted:...
TRANSCRIPT
The PRU Configuration for BW Aggregation
Document Number:IEEE C802.16m-08/802r3
Date Submitted:2008-07-16
Source:Youngsoo Yuk ([email protected])Inuk Jung ( [email protected] )Ronny (Yong-Ho) Kim ([email protected])
LG Electronics*http://standards.ieee.org/faqs/affiliationFAQ.html
Re:IEEE 802.16m-08/024: Call for comments on SDD comments
Purpose : To discuss in TGm as a SDD comment
Venue:(Denver, USA, July 2008)
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/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 >.
C802.16m-08/802r3
Considerations for BW Aggregation• Subcarrier Spacing
– Center frequency spacing should be integer multiples of Subcarrier Spacing
• Transmission Filter in a BS– The TX spectral Mask of aggregated BW should be same or better than that of legacy narrow
BW located in the edge of the aggregated BW.– More Sharp and complex filter should be supported for BS supporting aggregated BW.– Different TX Spectral Mask for Aggregated system
• Transmission/Reception Filter in MSs supporting wider BW– It is better to support the same filter characteristic with BS– Require high complexity for MS. (larger taps of FFR filter)– Can be a capability factor of Multicarrier supportable MS
• PRU configuration– The same PRU configuration should be applied for Both MSs supporting wider BW and MSs
supporting narrow BW– PRUs in the aggregated BW can be shared among MSs and/or be dedicated to some MS
supporting special BW.– Usage of the Irregular PRUs from the alignment problem ( Figure 1, 2)
• Solution 1 : Define Irregular PRU • Solution 2 : Remain empty• Solution 3 : Special PRUs for control channel for wider BW MSs.
– The dedicated PRUs for some MSs can be allocated only as LLRUs.
C802.16m-08/802r3
TX Spectral Mask for IEEE802.16e0
-25
-35
-50A B C D
dBr
A B C D
10MHz 4.75 5.45 9.75 14.75
20MHz 9.5 10.9 19.5 29.5
Aggregated 20MHz
9.75 10.45 14.75 19.75
MHz
20MHz
10MHz 10MHzSpectral Mask for Legacy System
Spectral Mask for Aggregated System
250 kHz
500 kHz
C802.16m-08/802r3
……
48 PRU
10M
Hz
10M
Hz
Sho
rten
ed 2
0MH
z B
and
Irregular RU(14x6 (with one DC))
……
……
48 PRU
95 PRUsfor Wider BW MS(94 regular + 1 irregular)
Ext
ende
d 20
MH
z B
and
Regular RU(18x6)
Aggregated 20MHz Non-aggregated 20MHz
96 PRU10MHz – 3.125kHz
0MHz
……
275kHz
Alignment Problem for aggregated BW
Legacy Guard Band for 20MHz
Legacy Guard Band for 20MHz
Legacy Guard Band for 10MHz
Legacy Guard Band for 10MHz
Figure 1
20MHz
120kHz
Lega
cy 2
0MH
z B
and
C802.16m-08/802r3
……
24 PRU
10M
Hz
Irregular RU(19x6)
……
48 PRU
94 PRUfor Wider BW MS(92 regular + 2 irregular)
Regular RU(18x6)
Aggregated 20MHzNon-aggregated 20MHz
96 PRU10MHz – 3.125kHz
0MHz
……
Lega
cy 2
0MH
z B
and
275kHz
Alignment Problem for aggregated BW
Guard Band for 20MHz
Guard Band for 20MHz
Legacy Guard Band for 10MHz
Legacy Guard Band for 5MHz
Figure 2
5MH
z5M
Hz
……
……
Irregular RU(25x6)
Sho
rten
ed 2
0MH
z B
and
Ext
ende
d 20
MH
z B
and
Sho
rten
ed10
MH
z B
and
24 PRU
413kHz
20MHz
120kHz
C802.16m-08/802r3
Configuration Index for Aggregated Multicarrier System
• From the configuration MSs can know the various information
– PRU structure• Position of Regular PRU• Position of Irregular PRU (or Empty
region, DC subcarriers)– Center frequency for each sub-band
• Frequency Shift Value• Spectral Mask
• Multicarrier Configuration Index (MCI)
– Index for the aggregated band configuration
– Simple Indication for the configuration-dependent information
– Even though the used BW by some MS is smaller than the total aggregated BW, the total BW configuration should be transmitted.
Total BW
BW configuration
MCIIrregular
PRUCenter
frequency …
10MHz
2 x 5MHz 07 x 6
(or 25x6)5MHz –
1.625kHz
15
MHz
3 x 5MHz 07 x 6
(or 25x6)…
10MHz + 5MHz
219 x 6
(one for DC)…
20
MHz
2 x 10MHz 014 x 6
(one for DC)…
… … …
2x5MHz + 10MHz
4
… …
40
MHz20MHz + 20MHz
N …
Table 1. Example of Configuration Index
C802.16m-08/802r3
Text Proposal
Insert the following text in the end of the first paragraph of SDD Chapter 11.6.4
11.6.4.1 Multi-carrier Control Information
In case of the multi-carrier transmission by carrier aggregation, the information for the total aggregated BW configuration is informed to MSs supporting wider BW via the primary carrier in form of Multicarrier Configuration Index (MCI).
Insert the following text after page 48, line 19 of SDD
19.1 Multi-carrier operation principles
• Carrier aggregationo MS shall always maintain its physical layer connection and monitor the control information on the primary carrier.o In case of aggregated BW transmission, the PRU configurations of the narrow band are maintained except for guard band. o The usage of the irregular PRU (e.g. 14, 25 subcarriers) generated by aggregating BW in guard band is FFS.o The DL/UL Resource allocation can be differently applied according to MS’s RF filter capability.
C802.16m-08/802r3
Text Proposal
Insert the following text as an new SDD subsection of 19.2
19.2. Multicarrier transmission by carrier aggregation
1.1 Multi-carrier Control Information