The PRU Configuration for BW Aggregation Document Number: IEEE C802.16m-08/802r3 Date Submitted: 2008-07-16 Source: Youngsoo Yuk

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The PRU Configuration for BW Aggregation Document Number: IEEE C802.16m-08/802r3 Date Submitted: Source: Youngsoo Yuk Inuk Jung ( Ronny (Yong-Ho) Kim LG Electronics * Re: IEEE m-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 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 Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and.

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 IEEE802.16e A B C D dBr ABCD 10MHz MHz Aggregated 20MHz MHz 20MHz 10MHz Spectral Mask for Legacy System Spectral Mask for Aggregated System 250 kHz 500 kHz

C802.16m-08/802r3 …… 48 PRU 10MHz Shortened 20MHz Band Irregular RU (14x6 (with one DC)) …… 48 PRU 95 PRUs for Wider BW MS (94 regular + 1 irregular) Extended 20MHz Band Regular RU (18x6) Aggregated 20MHz Non-aggregated 20MHz 96 PRU 10MHz – 3.125kHz 0MHz …… 275kHz Alignment Problem for aggregated BW Legacy Guard Band for 20MHz Legacy Guard Band for 10MHz Figure 1 20MHz 120kHz Legacy 20MHz Band

C802.16m-08/802r3 …… 24 PRU 10MHz Irregular RU (19x6) …… 48 PRU 94 PRU for Wider BW MS (92 regular + 2 irregular) Regular RU (18x6) Aggregated 20MHz Non-aggregated 20MHz 96 PRU 10MHz – 3.125kHz 0MHz …… Legacy 20MHz Band 275kHz Alignment Problem for aggregated BW Guard Band for 20MHz Legacy Guard Band for 10MHz Legacy Guard Band for 5MHz Figure 2 5MHz …… Irregular RU (25x6) Shortened 20MHz Band Extended 20MHz Band Shortened10MHz Band 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 MCI Irregular PRU Center frequenc y … 10M Hz 2 x 5MHz0 7 x 6 (or 25x6) 5MHz – 1.625kHz 15 MHz 3 x 5MHz0 7 x 6 (or 25x6) … 10MHz + 5MHz 2 19 x 6 (one for DC) … 20 MHz 2 x 10MHz0 14 x 6 (one for DC) … ……… 2x5MHz + 10MHz 4 …… 40 MHz 20MHz + 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 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 aggregation o 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 Multicarrier transmission by carrier aggregation 1.1 Multi-carrier Control Information