1. Modifications to the Sub-band Partitioning Formulas (Reply to Comment A0564) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: C802.16m-10/0434 Date Submitted: 2010-03-10 Source: Fred Vook, Mark Cudak, Bill Hillery, Eugene Visotsky, Anup Talukdarfred.vook@motorola.com Motorola * http://standards.ieee.org/faqs/affiliationFAQ.html http://standards.ieee.org/faqs/affiliationFAQ.html Venue: Session #66 – Orlando Meeting Re: P802.16m/D4 comments for LB31 – Reply to Comment #A0564 Area: Section 16.3.5.2.1 – DL PHY Structure Section 16.3.8.2.1 – UL PHY Structure Abstract: In the PHY structure in the D4 draft, when two groups of DRUs are allocated, those two groups are fairly close together in frequency, which is not good for exploiting frequency diversity. Comment A0564 / Contribution C802.16m-10/0044 proposes a modification which provides much better spacing in the DRUs when few DRUs are allocated, but the sub-bands are very close together in frequency when few sub-bands are allocated. We propose to slightly modify the sub-band partitioning equations in contribution C802.16m-10/0044 to improve the location of the PRUs that are allocated to be sub-bands while preserving the spacing of the DRUs achieved in Contribution 10/0044. Purpose: Discuss and adopt 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. C80216m-10/0434 2 Modifications to the Sub-band Partitioning Formulas DL: Section 16.3.5.2.1 UL: Section 16.3.8.2.1 Reply to Comment A0564 of LB31 Fred Vook Mark Cudak Motorola

3. C80216m-10/0434 3 Overview This reply contribution addresses the issue of the spacing between DRUs and the spacing between Sub-bands in the PHY structure Currently in the D4 Draft: –When few DRUs/Mini-bands are allocated (high DSAC value), they are spaced very close together, which is not good for exploiting frequency diversity –When few Sub-bands are allocated (low DSAC value), they are spaced reasonably far apart, which is good for frequency selective scheduling Contribution 10/0044 / Comment A0564 proposes a modification to D4: –When few DRUs/Mini-bands are allocated (high DSAC value), they are spaced reasonably far apart –However, when few sub-bands are allocated (low DSAC value), they are spaced very close together, which is not good for frequency selective scheduling We propose a slight modification to the new formulas proposed in Contrib 0044 –The modification is to add a simple right circular shift (by N1 PRUs) to the formulas proposed in Contribution 10/0044 –When few DRUs/Mini-bands are allocated (high DSAC value), they are spaced reasonably far apart (same spacing as in Contribution 10/0044) –When few Sub-bands are allocated (low DSAC value), they are spaced reasonably far apart. –All other spacings achieved in Contribution 10/0044 are preserved by this modification

4. C80216m-10/0434 4 Current PHY Structure – D4 DSAC=0:1:10 DCAS_sb0=DSAC DFPC=0 DFPSC=0 DCAS_mb0=0 DCASi=0 IDCell=2 DSAC=9 or 10: DRUs are too close! (Bad) DSAC=2 or 3: Subbands are far apart (Good)

5. C80216m-10/0434 5 PHY Structure – Contrib 10/0044 / Comment A0564 DSAC=0:1:10 DCAS_sb0=DSAC DFPC=0 DFPSC=0 DCAS_mb0=0 DCASi=0 IDCell=2 DSAC=2 or 3: Subbands are too close (Bad) DSAC=9 or 10: DRUs are much better spaced than in D4 (Good)

6. C80216m-10/0434 6 Proposed Modification to Contrib 10/0044 / Comment A0564 DSAC=0:1:10 DCAS_sb0=DSAC DFPC=0 DFPSC=0 DCAS_mb0=0 DCASi=0 IDCell=2 DSAC=2 or 3: Subbands are better spaced than in D4 and Contribution 10/0044 (Good) DSAC=9 or 10: DRUs have same spacing as in Contribution 10/0044 (Good)

7. C80216m-10/0434 7 Proposed Text Changes to D4 (1 of 4) [ Modify Equation 176 on page 375, starting on line 26 as follows: ] where (176)

8. C80216m-10/0434 8 Proposed Text Changes to D4 (2 of 4) [ Modify Equation 177 on page 375, starting on line 42 as follows: ] (178)

9. C80216m-10/0434 9 Proposed Text Changes to D4 (3 of 4) [ Modify Equation 252 on page 580, starting on line 50 as follows: ] (233)

10. C80216m-10/0434 10 Proposed Text Changes to D4 (4 of 4) [ Modify Equation 253 on page 580, starting on line 64 as follows: ] (235)