Indication of WUR Packets in IEEE 802.11-17/0387r2 Document
Discussing the importance of Wake Up Packet (WUP) purpose indication in WUR scenarios within the IEEE 802.11-17/0387r2 document. Various wake up scenarios, such as synchronization, beacon reception, and data transmission, are explored in detail based on the transmitted WUP content. Different behaviors of Access Points (APs) and Stations (STAs) are highlighted depending on the purpose of the WUP, aiming to improve overall network efficiency.
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March 2017 doc.: IEEE 802.11-17/0387r2 Purpose Indication of WUR Packets Date: 2017-03-12 Authors: Name Xiaofei Wang Affiliations Address InterDigital Communication Inc. Phone +1 631.622.4028 email Xiaofei.wang@interdigital .com 2 Huntington Quadrangle Melville, NY 11747 Joseph Levy Rui Yang Submission Slide 1 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Abstract In this contribution, we discuss the need and benefits for WUR packets to indicate their purposes. Submission Slide 2 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Introduction Many different wake up scenarios have been discussed in WUR SG and TGba using a Wake Up Packet (WUP) E.g., an AP may use a WUP to wake up one or more STAs for the following purposes: Synchronization [1][3] Request STAs to listen to beacon [2] Data transmission: DL/UL [1][3] and/or SU/MU [1][2] E.g., a STA may use a WUP to wake up an AP for the following purposes: Discovery and association [4] UL Data Transmission [5] STA behaviors and WUP contents are expected to be different in many of the scenarios described above depending on the purpose of the transmitted WUP. Slide 3 Submission Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Wake up scenario analysis (1) Scenario 1: An AP sends a WUP to one or more STAs for synchronization: Example WUP content: TSF timer Example receiving STA behavior: synchronize, no need to turn on Primary Connectivity Radio (PCR) Scenario 2: An AP sends a WUP to STAs to request the STAs to receive the beacon: Example WUP content: beacon TBTT, maybe reason Example receiving STA behavior: turn on PCR and receive beacon Scenario 3: An AP sends a WUP to one or more STAs for SU/MU DL/UL data transmission: Example WUP content: DL/UL indication, TOMI/ROMI, SU/MU indications, resource allocation for STAs Submission Slide 4 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Wake up scenario analysis (2) Scenario 3: An AP sends a WUP to one or more STAs for SU DL/UL data transmission: Example receiving STA behavior: Inform AP of waking up/Turn on PCR Adjust TOMI/ROMI Tx/Rx accordingly Scenario 4: A STA may send a WUP to an AP for discovery and association: Example WUP content: SSID/BSSID requested, Service Requested Example receiving AP behavior: send beacon/broadcast probe response to facilitate discovery/association Submission Slide 5 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Wake up scenario analysis (3) Scenario 5: A STA may send a WUP to an AP for UL data transmission: Example WUP content: DL/UL request indication, TOMI/ROMI indication, BU size indication Example receiving AP behavior: Inform STA of waking up/Turn on PCR Adjust TOMI/ROMI Rx accordingly Submission Slide 6 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 WUP Purpose Indication If the purpose of a WUP is indicated in the WUP: It will help receiving STAs to optimize operations following the receptions of the WUP It can provide indication of the content of the WUP as well Can WUP purpose be indicated using other fields, e.g., the Type field? The content of a packet is typically indicated by the Type field Purposes such as synchronization, request STAs to receive beacons, wake up STAs for UL/DL SU/MU packets are typically not covered by the Type field Can the purpose of wake up be indicated through the PCR Some of the purposes such as UL/DL, SU/MU data transmission may be indicated using PCR; Likely requires additional overhead (packet exchanges) Synchronization may not require STAs to turn on their PCRs Slide 7 Submission Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Summary STA behaviors and WUP contents are expected to be very different in many wake up scenarios depending on the purpose of the transmitted WUP. Allowing the WUP to indicate the wake up purpose may better prepare receiving STAs for optimized operations Some of the WUP purposes may include: Synchronization Request STAs to receive beacon UL/DL SU/MU data transmissions AP discovery and association Submission Slide 8 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 References [1] 11-17/0054r1, WUR MAC Issues, Jan. 2017 [2] 11-17/0124r1, WUR MAC and Wakeup Frame, Jan. 2017 [3] 11-17/0034r0, WUR Use Cases and Requirements, Jan. 2017 [4] 11-16/1400r0, Power Efficient WUR AP Discovery, Nov. 2016 [5] 11-16/0029r4, WUR Usage Model Document, Jan. 2017 Submission Slide 9 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Straw Poll Do you agree that a wake up packet should include a purpose field to indicate the purpose of the wake up operation? Submission Slide 10 Xiaofei Wang (InterDigital)
March 2017 doc.: IEEE 802.11-17/0387r2 Motion Do you agree to add the following to the 802.11ba SFD A wake up packet should include a purpose field to indicate the purpose of the wake up operation. Move: Xiaofei Wang Second: Y: N: A: Submission Slide 11 Xiaofei Wang (InterDigital)
