Unsolicited RSS for SLS in DTI

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Presentation transcript:

Unsolicited RSS for SLS in DTI May 2015 doc.: IEEE 802.11-16/0XXXr0 July 2017 Unsolicited RSS for SLS in DTI Date: 2017-7-13 Authors: 1 Dejian Li (Huawei), et al Dejian Li (Huawei)

July 2017 Introduction In 11ad, a pair of STAs always perform both ISS and RSS in single TXOP/SP during DTI, which is not flexible and inefficient. In 11ay D0.3, the NoRSS capability field indicates an EDMG STA supports SLS without RSS in a TXOP. This contribution proposes unsolicited RSS instead of NoRSS, which needs less modifications to the SSW frame. The main difference is the term NoRSS is changed to Unsolicited RSS. 2 Dejian Li (Huawei), et al

Proposed Unsolicited RSS (1/2) July 2017 Proposed Unsolicited RSS (1/2) In 11ay, the ISS and RSS can be performed in two different TXOPs. Initiating Phase: ISS in TXOP1/SP1 STA B that does not match the RA field of SSW frames can process the received SSW frames from the ISS or RSS of STA A. Accomplishment phase: (unsolicited RSS + SSW Feedback + SSW Ack) w/o ISS in TXOP2/SP2 Following TXOP1/SP1, the STA B initiates a new TXOP to perform unsolicited RSS including the Sector Select (Best Sector ID) for STA A. 3 Dejian Li (Huawei), et al

Proposed Unsolicited RSS (2/2) July 2017 Proposed Unsolicited RSS (2/2) Unsolicited RSS may be used to respond to an earlier ISS or RSS . In TXOP1/SP1, STA A may set Direction = 0 (ISS) or Direction = 1 (RSS) . In TXOP2/SP2, the Direction field in SSW field is used to indicate the unsolicited RSS by the TXOP holder/SP source. 4 Dejian Li (Huawei), et al

July 2017 Signaling (1/3) Allow an EDMG STA to set the Direction field to 1 when operates as a TXOP holder/SP source STA. In 11ad, the TXOP holder/SP source shall set the Direction = 0 for ISS. But for the unsolicited RSS, the TXOP holder/SP source sets the Direction = 1. 5 Dejian Li (Huawei) et al

July 2017 Signaling (2/3) Insert the Unsolicited RSS Enabled field to SSW Feedback field using one reserved bit. To indicate the SSW frame transmitter is capable to get an unsolicited RSS. 6 Dejian Li (Huawei) et al

July 2017 Signaling (3/3) Insert the Unsolicited RSS bit into the BF Control field IsInitiatorTXSS and IsResponderTXSS indicate that ISS and RSS are both always present in SLS, which cannot indicate the unsolicited RSS Unsolicited RSS (B12) 7 Dejian Li (Huawei), et al

July 2017 Conclusion Using unsolicited RSS, BF time can be saved significantly due to skipping the already performed “ISS”. Standard impact Use the Direction subfield in SSW field to indicate the unsolicited RSS or a normal ISS. Insert the Unsolicited RSS Enabled field to indicate the whether the trasnmitter of Unsolicited RSS Enabled field is ready to receive an unsolicited RSS. Insert Unsolicited RSS field to the BF Control field 8 Dejian Li (Huawei), et al

July 2017 Straw poll 1 Do you agree that the text in contribution 17/1085r0 (Proposed resolution to NoRSS related CIDs) shall be incorporated in the 11ay draft? Y /N /A 9 Dejian Li (Huawei), et al