RSDB Configuration for Off-Channel TDLS Latency Reduction
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Solution Overview
Problem
Current wireless communication systems, such as those using the IEEE 802.11 standard, face latency and throughput issues due to the need for dual-band capable devices to toggle between frequency bands when using tunneled direct link setup (TDLS) for multimedia and gaming applications, which requires seamless and low-latency data transfer.
Innovation Solution
Implementing a real-time simultaneous dual band (RSDB) configuration that allows dual-band capable wireless devices to maintain parallel operation of base-channel links with an access point and TDLS direct links with peer stations over different frequency bands, eliminating the need for toggling between channels and reducing latency and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a dual-band capable STA toggles between off-channel and base-channel to receive beacons and communicate with legacy STAs, then power saving is achieved and legacy STA compatibility is maintained, but latency increases and data transfer continuity deteriorates
Solution Approach 1:
The patent segments the communication functionality by separating the base-channel operations (for legacy STA compatibility and beacon reception) from off-channel TDLS operations. The STA maintains independent capability to operate on both channels, eliminating the need to toggle between them. This segmentation allows simultaneous or rapid switching between channels without latency penalties, as each channel operation is independently managed.
Solution Approach 2:
The patent implements preliminary action by having the STA pre-establish and maintain capability on both base-channel and off-channel simultaneously. Instead of switching channels when needed, the STA prepares and maintains both communication paths in advance, allowing immediate data transfer on either channel without transition delays. This is achieved through dual-band radio configuration that keeps both frequency bands ready for operation.
2Productivity
If a STA switches between off-channel and base-channel for TDLS direct links, then channel utilization is optimized, but data transfer continuity and seamless connectivity are compromised
Solution Approach 1:
The patent ensures continuity of useful action by maintaining the STA's ability to operate continuously on both base-channel and off-channel without interruption. The dual-band capability allows the STA to sustain data transfer on the off-channel TDLS link while simultaneously maintaining base-channel connectivity, eliminating gaps in data transfer that would occur during channel switching. This continuous operation on both channels simultaneously ensures uninterrupted data flow.
3Ease of operation
If dual-band capable devices operate in crowded 2.4 GHz band, then discoverability and signal propagation are improved, but channel congestion and latency increase
Solution Approach 1:
The patent applies dimensionality change by transitioning data transfer operations from the congested 2.4 GHz base-channel to the less crowded 5 GHz off-channel. This moves the data transfer activity to a different frequency dimension, reducing interference and congestion while maintaining the benefits of 2.4 GHz operation for initial connection and legacy compatibility. The off-channel provides an alternative dimensional space for high-speed data transfer.
Data Source
AI summary
Devices, systems and methods establish a first wireless link with an access point (AP) via a first frequency band, establish a tunneled direct link setup (TDLS) link with a peer wireless device using the first frequency band. Embodiments, switch from using the first frequency band for the TDLS link to using a second frequency band for the TDLS link and use a real-time simultaneous dual band (RSDB) configuration to communicate with the peer wireless device through the TDLS link using the second frequency band and concurrently communicate with the AP through the first wireless link using the first frequency band.