RAW Assignment follow up Month Year doc.: IEEE 802.11-yy/xxxxr0 May 2013 RAW Assignment follow up Date: 2013-05-13 Authors: Name Affiliations Address Phone Email Jeongki Kim LG Electronics LG R&D Complex Anyang-Shi, Kyungki- Do, Korea +82-31-450-7808 jeongki.kim@lge.com Yongho Seok Jinsoo Choi Hangyu Cho Eric Wong Broadcom Sunnyvale, CA +1 408 922 6672 ewong@broadcom.com Matthew Fischer mfischer@broadcom.com Yong Liu yongliu@broadcom.com Minyoung Park Intel Hillsboro, OR +1 503 712 4705 minyoung.park@intel.com Adrian Stephens Tom Tetzlaff Emily Qi Simone Merlin Qualcomm San Diego, CA +1 858 845 1243 smerlin@qualcomm.com Santosh Abraham Menzo Wentink Alfred Asterjadhi Amin Jafarian Hemanth Sampath VK jones Jeongki Kim, LG Electronics John Doe, Some Company

Authors: May 2013 Month Year doc.: IEEE 802.11-yy/xxxxr0 Name Affiliations Address Phone Email Su Khiong Yong Marvell Hongyuan Zhang Sudhir Srinivasa George Calcev Huawei Osama Aboul Magd Young Hoon Kwon Betty Zhao David Yangxun Bin Zhen ChaoChun Wang MediaTek James Wang Jianhan Liu Vish Ponnampalam James Yee Thomas Pare Kiran Uln Huai-Rong Shao   Samsung Electronics Chiu Ngo Minho Cheong ETRI Jae Seung Lee Hyoungjin Kwon Jaewoo Park Sok-kyu Lee Sun, Bo         ZTE Lv, Kaiying         Jeongki Kim, LG Electronics John Doe, Some Company

Authors: May 2013 Name Affiliations Address Phone Email Sayantan Choudhury Nokia Klaus Doppler Chittabrata Ghosh Esa Tuomaala Ken Mori Panasonic Rojan Chitrakar Haiguang Wang I2R Shoukang Zheng Yeow Wai Leong Zander Lei Yuan Zhou Anna Pantelidou Renesas Mobile Juho Pirskanen Timo Koskela Liwen Chu STMicroelectronics George Vlantis Jeongki Kim, LG Electronics

May 2013 Introduction Short Beacon frame is defined to reduce the size of Beacon, which needs to be minimized Optional field indications in Short Beacon: Time of Next TBTT Present, SSID Present, Internetworking Present Short Beacon carries TIM IE and RPS IE which are large parts in Short Beacon RPS IE like TIM IE needs to be optimized E.g.,) Same Group Indication [1] RAW N Assignment field in RPS IE Size of one RAW N Assignment filed is about 8~9 bytes [1] Size of a RAW Group subfield is 3 bytes (about 30 %) Size of a RAW Start Time subfield is 1 bytes (about 12%) Jeongki Kim, LG Electronics

May 2013 Issues An AP can assign the paged all STAs to one RAW when the number of paged STAs is not large In this case the information of RAW Group may be same as the paged STAs’s information indicated by TIM Generally the Data RAWs follows a PS-Poll/Trigger-frame RAW and STAs can implicitly calculate the RAW start times of these consecutive RAWs based on the RAW Duration of the previous RAW And if the first RAW follows the Short Beacon (or Beacon) frame, STAs can also know the start time of the first RAW without the RAW Start Time We propose the RAW Assignment enhancement for two subfields (RAW Group & RAW Start Time) Jeongki Kim, LG Electronics

Proposal Proposed RAW N Assignment field May 2013 In RAW 1 Assignment, Same Group Indication (1) indicates that the RAW Group information of the RAW 1 Assignment is decided based on the information of STAs included in TIM Bitmaps RAW Start Time Present (0) indicates that the RAW starts immediately after the end of the previous RAW At the RAW 1 Assignment, RAW Start Time Present (0) indicates that the RAW starts immediately after the end of the beacon frame transmission If the RAW Start Time Present is set to 0 in a RAW N Assignment field, then RAW Start Time subfield is not present in the RAW Assignment field Jeongki Kim, LG Electronics

May 2013 Example In Options subfield, the bit 0 = 1 (i.e., Access Restricted to Paged STAs Only) Jeongki Kim, LG Electronics

Overhead analysis on example May 2013 Overhead analysis on example Assumption RAW Duration = 8 bits, Slot definition = 12 bits [1] Based on example Analysis Size of the current RPS element = Element ID & Length (16 bits) + RAW 1 Assignment (72 bits) + RAW 2 Assignment (48 bits, by Same Group Indication) = 17 bytes(136 bits) Size of the proposed RPS element = Element ID & Length (16 bits) + RAW 1 Assignment (40 bits) + RAW 2 Assignment (40 bits) = 12 bytes(96 bits) Gain = 5 bytes saving (29 % overhead reduction) Jeongki Kim, LG Electronics

May 2013 Summary For reducing the size of Short Beacon frame/Beacon frame, the RPS element needs to be optimized like TIM element The size of RPS IE can be reduced by the proposed fields (i.e., RAW Start Time present, Same Group Indication in RAW 1 Assignment) According to analysis based on example, we can obtain 29% overhead gain Jeongki Kim, LG Electronics

Reference May 2013 [1] IEEE 802.11-13/0290r0 RAW Operation Improvement Jeongki Kim, LG Electronics

May 2013 Straw Poll 1 Do you support to reuse the Same Group Indication field in RAW 1 Assignment as slide 6? Jeongki Kim, LG Electronics

May 2013 Straw Poll 2 Do you support to include the RAW Start Time present subfield in RAW N Assignment field as slide 6? Jeongki Kim, LG Electronics