Discussion of WUR Packets Design

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Presentation transcript:

Discussion of WUR Packets Design doc.: IEEE 802.11-yy/XXXXr0 Month Year Discussion of WUR Packets Design Date: 2016-11-07 Authors: Name Affiliation Address Email Ke Yao ZTE yao.ke5@zte.com.cn Bo Sun sun.bo1@zte.com.cn Kaiying Lv lv.kaiying@zte.com.cn Xuelin Zhang Zhang.x_l@zte.com.cn Nan Li li.nan25@zte.com.cn Ke Yao, et, al. (ZTE)

Background WUR, as an add-on module to WLAN device, is considered to be a high efficient power saving method due to its ultra low power consumption. WUR PAR and CSD have been submitted to IEEE 802 EC for approval. PAR mentioned that wake up packets carry control information. The content of WUR packet is discussed in this proposal. Ke Yao, et, al. (ZTE)

Principles of WUR Packet Design In order to achieve cost efficient while maintaining low power consumption level: Transmission of WUR packets should be as less as possible Only part of WUR module needs to monitor WUR channel at all time Only when needed, the full WUR module will be triggered Logic of the WUR RX module should be as simple as possible Less WUR packet type to simplify receiving parser. Simple structure of each WUR packet type Next slides provide some considerations on the WUR packet design. Ke Yao, et, al. (ZTE)

Functionality of WUR Packet To wake up WUR STA wake up packet is needed the primary requirement on WUR channel To keep WUR link connection alive The packet which can be seen as heart-beating is needed WUR STA can stay in deep sleep mode for a very long time without worry about abnormal situation, such as AP’s WU message is unreachable. To keep time alignment between AP and STA in WUR on/off mode Time information should be carried in certain WUR packets Long time in deep sleep mode may cause timing synchronization inaccurate. Ke Yao, et, al. (ZTE)

Wake Up Packet Wake up packet should contain the following contents: Must to have Rx ID and Tx ID to uniquely identify the receiver Best to have 1 bit indication of DL/UL to support imbalanced length of Tx/Rx ID AP and non-AP STA may have different length of Identifier Wake up auxillary information to support various operations after or during wake-up, such as the predefined information which should be fedback after wake up Target main module primary channel info to avoid scanning, for paging packet Ke Yao, et, al. (ZTE)

Wake up auxiliary information The predefined information can be used to Indicate the receiver to feedback certain information, such as Measurement of temperature, humidity, density of gas, speed of wind,… in sensor use cases Location information Power level/ battery remaining lifetime Indicate the receiver to do some predetermined type of operation, then feedback the status For remote control, smart home, smart industry, smart traffic, smart agriculture Indicate the receiver to access the network The predefined information could be application dependent Ke Yao, et, al. (ZTE)

Heart Beating packet Heart beating packet should at least contain: RxID and TxID (AP) Ordinary wake up packets can be seen as heart beating packet for the third party receiver Ke Yao, et, al. (ZTE)

Packet for timing alignment Packet for timing alignment contains: RxID: Broadcast ID TxID: AP Timing info Mainly for on/off mode WUR, also helps always-on WUR to adjust time Ke Yao, et, al. (ZTE)

Conclusion Discussed what kind of packets should be supported on WUR channel WUR packet to wake up receiver WUR packet to keep WUR link connection alive WUR packet to keep time alignment Provided considerations on the content of these packets for further WUR message design. Ke Yao, et, al. (ZTE)

References [1] 11-16-1045-06-0wur-a-par-proposal-wur-sg Ke Yao, et, al. (ZTE)