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Page Scheduling Date: Authors: May 2013 Name Affiliation

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Presentation on theme: "Page Scheduling Date: Authors: May 2013 Name Affiliation"— Presentation transcript:

1 Page Scheduling Date: 2013-05-10 Authors: May 2013 Name Affiliation
Month Year doc.: IEEE yy/XXXXr0 May 2013 Page Scheduling Date: Authors: Name Affiliation Address Phone Yuan Zhou I2R 1 Fusionopolis Way, Singapore Shoukang Zheng Zander Lei Haiguang Wang Wai Leong Yeow Li Chia Choo Yongho Seok LG Electronics LG R&D Complex Anyang-Shi, Kyungki-Do, Korea Jinsoo Choi Jeongki Kim HanGyu Cho Simone Merlin Qualcomm 5775 Morehouse Dr, San Diego, CA Alfred Asterjadhi Amin Jafarian Y. Zhou, I2R Shoukang ZHENG et. al, I2R, Singapore

2 May 2013 Y. Zhou, I2R Santosh Abraham Qualcomm Bin Tian George Cherian
Bin Tian George Cherian Menzo Wentink Hemanth Sampath VK Jones Minyoung Park Intel Corp. Tom Tetzlaff Emily Qi Su Khiong Yong Marvell Hongyuan Zhang Sudhir Srinivasa Matthew Fischer Broadcom 190 Mathilda Place, Sunnyvale, CA Eric Wong Sun, Bo         ZTE Lv, Kaiying         Huai-Rong Shao   Samsung Chiu Ngo Chittabrata Ghosh Nokia 2075 Allston Way, Suite 200, Berkeley, CA Klaus Doppler Sayantan Choudhury Esa Tuomaala Rojan Chitrakar Panasonic Ken Mori Y. Zhou, I2R

3 May 2013 Y. Zhou, I2R Jae Seung Lee ETRI jasonlee@etri.re.kr
Hyoungjin Kwon Jaewoo Park Sok-kyu Lee George Calcev Huawei Rolling Meadows, IL USA Osama Aboul Magd Young Hoon Kwon Betty Zhao ChaoChun Wang MediaTek James Wang Jianhan Liu Vish Ponnampalam James Yee Thomas Pare Kiran Uln Anna Pantelidou Renesas Mobile Juho Pirskanen Timo Koskela Liwen Chu STMicroelectronics George Vlantis Y. Zhou, I2R

4 May 2013 Introduction We propose to add ‘Page Period’ indication in Segment Count IE to support more flexible page scheduling. Y. Zhou, I2R

5 Background: TIM Segmentation
May 2013 Background: TIM Segmentation TIM and page segmentation has been accepted in ah SFD [1] for STAs supporting TIM segmentation Fragment the TIM element into equal sized TIM segments. Multiple such TIM segments may be assigned within a DTIM beacon interval. Each TIM segment shall use a fixed length Page segment within one DTIM beacon interval. Each ordered page segment is assigned sequentially to TIM segments, where the first Page segment may be assigned to the DTIM segment. For a STA not supporting TIM segmentation, its corresponding bit in the TIM shall be included in all the Beacons irrespective of segmentation Y. Zhou, I2R

6 Background: Segment Count IE (SC-IE)
May 2013 Background: Segment Count IE (SC-IE) The Segment Count element indicates the sequence of Page segments. Page Index: the Page whose segments are served during TIM intervals within a DTIM interval. Page Segment Count: number of TIM segments scheduled in one DTIM interval Maximum of 32 TIM segments in a DTIM interval Page Offset field: offset of the block in the first Page segment from the first block in the Page assigned within the DTIM interval. Page Bitmap field: indication of presence of buffered data for each of the one or more blocks in all the assigned page segments within a DTIM interval. Y. Zhou, I2R

7 May 2013 Problem (1) DTIM period is usually determined based on application’s latency requirement for broadcast / multicast data. With current TIM segmentation, DTIM period also has to cater for TIM segments. TIM segments of a page are transmitted within one DTIM period. DTIM period may not match TIM segmentation. E.g. DTIM period = 4 BI, but TIM segmentation requires 16 segments. Y. Zhou, I2R

8 May 2013 Problem (2) Hierarchical TIM structure defines multiple pages. Each page may have different traffic features and require different TIM segmentation. Current TIM segmentation scheme cannot efficiently support different pages with different number of TIM segments. E.g.: Page 1: 64 STAs with 2 segments Page 2: 2000 STAs with 32 segments Page 1Segment Count = 32 P1 S1 P1 S2 P1 S1 P1 S2 P2 S1 P2 S2 P2 S3 P2 S4 P2 S32 P2 S1 P2 S2 … DTIM DTIM Page 2 Segment Count = 32 Y. Zhou, I2R

9 Proposal Add ‘Page Period’ indication in Segment Count IE.
May 2013 Proposal Add ‘Page Period’ indication in Segment Count IE. Page Period indicates the number of beacon intervals between successive beacons that carry the Segment Count IE for the associated page. Element ID Length Page Index Page Period (1 byte) Page Segment Count Page Offset Reserved Page Bitmap Segment Count IE for each page may not be transmitted on every DTIM. Transmission of TIM segments of a page may span over multiple DTIM periods. Same as current TIM segmentation when Page Period = DTIM Period. Y. Zhou, I2R

10 Examples of Page Period
May 2013 Examples of Page Period The definition of Page Period decouples TIM segmentation from DTIM period and supports more flexible page scheduling. Page 1 period = 4 BI DTIM Page 1 SC-IE Page 2 SC-IE DTIM Page 1 SC-IE Page 2 SC-IE DTIM Page 1 SC-IE DTIM Page 1SC-IE Page 2 period = 8 BI Page 1 TIM segments, scheduled every DTIM Page 2 TIM segments, scheduled every 2 DTIMs Y. Zhou, I2R

11 May 2013 Straw Poll Do you support to include SFD a ‘Page Period’ indication in Segment Count IE to indicate the number of beacon intervals between successive beacons that carry the Segment Count IE for the associated page? Y N A Y. Zhou, I2R

12 Reference [1] 11-12-1084-04-00ah-tim-and-page-segmentation. May 2013
Y. Zhou, I2R

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