Aligned Target Wake Time Scheduling for Multi-Link Audio Latency
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Solution Overview
Problem
Existing wireless communication systems face high latency issues due to the exchange of Bluetooth messages and TWT teardown procedures for extended personal audio networks, which are not suitable for applications requiring ultra-low latency and lossless audio, such as ULL gaming and streaming lossless audio.
Innovation Solution
Implementing a target wake time (TWT) technique with aligned schedules across multiple links using wireless signaling to update TWT parameters efficiently, reducing latency by embedding parameters in audio data packets and acknowledging them, thereby minimizing latency in TWT parameter updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Bluetooth messages and TWT teardown procedures are exchanged for extended personal audio networks, then device compatibility and connection reliability are improved, but latency increases significantly
Solution Approach 1:
The patent extracts the TWT parameter update process from the traditional Bluetooth message exchange and teardown procedures, implementing it directly through wireless signaling within the audio data packets. This removes the unnecessary intermediate steps and protocol overhead that caused latency, while maintaining the essential function of TWT parameter synchronization.
Solution Approach 2:
The patent embeds TWT parameters in advance within the audio data packets themselves, so that the parameters are already prepared and available when needed. This preliminary embedding eliminates the need for separate update exchanges and teardown procedures, reducing latency while ensuring reliable TWT synchronization.
2Adaptability or versatility
If traditional TWT update procedures are used with Bluetooth messaging, then protocol compatibility is maintained, but latency and processing overhead increase
Solution Approach 1:
The patent merges the TWT parameter update function with the existing audio data packet transmission. By combining these two separate processes into one, the system eliminates redundant messaging and teardown procedures, reducing processing overhead and latency while maintaining protocol compatibility through the standardized field embeddings.
Solution Approach 2:
The patent makes the audio data packets multi-functional by embedding TWT parameters within them. This allows the same packet structure to serve both audio transmission and TWT synchronization purposes, eliminating the need for separate Bluetooth message exchanges and reducing overall processing overhead.
3Measurement precision
If TWT parameters are updated through separate messaging procedures, then update accuracy can be verified, but latency and communication overhead increase
Solution Approach 1:
The patent uses the audio data packet as an intermediary carrier for TWT parameters. Instead of requiring separate messaging procedures for parameter updates, the parameters are transported through the existing audio data stream, which acts as a mediator. This maintains update accuracy through standardized field embeddings while eliminating the need for additional communication overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless device may transmit, to a second wireless device, a request to configure a target wake time (TWT) schedule for a first link associated with the second wireless device, the request including an indication for TWT alignment with a TWT schedule of a second link associated with a third wireless device, the indication for the TWT alignment indicated within a field that is configured to indicate a TWT start time. The first wireless device may receive, from the second wireless device, a response indicating a TWT start time within the field, the TWT start time based at least in part on the indication for TWT alignment with the TWT schedule of the second link. Numerous other aspects are described.