r-TWT Schedule Signaling via TDLS for Direct P2P Streams
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Solution Overview
Problem
Existing wireless communication standards, such as IEEE 802.11be/D1.5, face challenges in efficiently managing peer-to-peer (P2P) communications for latency-sensitive applications like online gaming and virtual reality due to AP-centric mechanisms that double airtime and medium access, and lack of synchronization between peer non-AP stations for rTWT schedules.
Innovation Solution
Implementing a method that uses Tunneled Direct Link Setup (TDLS) Action frames to notify partner peer non-AP stations about the rTWT schedule negotiated with the AP, allowing direct peer-to-peer communication during rTWT service periods without AP forwarding, using existing frame formats to maintain transparency and reduce overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If AP-centric mechanisms are used for P2P communication, then medium access control is simplified, but airtime is doubled and latency increases
Solution Approach 1:
The patent extracts the P2P communication path from the AP-centric routing by allowing direct peer-to-peer data transmission during rTWT service periods. The TDLS Action frame mechanism enables peers to establish direct links while the AP maintains simplified control through trigger-based scheduling, resolving the contradiction by removing the unnecessary AP forwarding step that doubled airtime.
Solution Approach 2:
The patent applies preliminary action by pre-establishing rTWT schedules and notifying peers in advance using TDLS Action frames. This allows peers to wake up and prepare for direct communication during scheduled service periods, eliminating the need for real-time AP mediation and reducing medium access overhead.
2Reliability
If rTWT schedules are established with AP, then latency sensitive traffic is prioritized, but peer non-AP stations are not synchronized and may be asleep during service periods
Solution Approach 1:
The patent implements feedback by having the initiating peer send TDLS Action frames containing rTWT schedule information to its peer. This feedback mechanism ensures the peer is notified of the scheduled service periods and wakes up accordingly, synchronizing peer availability with the AP-established rTWT schedule while maintaining latency sensitive traffic delivery reliability.
Solution Approach 2:
The patent makes the TDLS Action frame multi-functional by using it both for TDLS setup and for notifying rTWT schedule information to peers. This universal use of the existing frame type eliminates the need for separate notification mechanisms while achieving peer synchronization.
3Loss of information
If new notification frames are created to convey rTWT information to peers, then peer synchronization is improved, but frame overhead increases
Solution Approach 1:
The patent applies universality by making the TDLS Action frame serve dual purposes: both for establishing TDLS connections and for notifying rTWT schedule information to peers. This eliminates the need for separate notification frames, reducing overhead while achieving peer synchronization.
Solution Approach 2:
The patent merges the rTWT notification function with the existing TDLS Action frame structure. By combining these two functions into a single frame type, the patent avoids adding overhead while still providing the necessary peer synchronization information.
Data Source
AI summary
To perform P2P transmissions within restricted Target Wake Time service period, rTWT service periods, an initiator peer station establishes membership in an rTWT schedule with the AP of the BSS, establishes a Tunneled Direct Link Setup, TDLS, session with its partner peer station, and efficiently notifies the partner peer station about the rTWT schedule using a TDLS Action frame that carries rTWT information, such as a Broadcast TWT Identifier, about the rTWT schedule. The TDLS Action frame may be a modified TDLS Peer Traffic Indication frame or of a new type or the modified TDLS Setup Request Action frame used for the TDLS session establishment. Thanks to this notification, the partner peer station can awake at the appropriate times of the rTWT service periods as specified in beacon frames from the AP, in order to receive or exchange peer-to-peer data directly with the initiator peer station.