Off-Channel P2P Channel Selection for Low-Latency Wi-Fi
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Solution Overview
Problem
Current wireless communication systems lack efficient mechanisms for off-channel peer-to-peer (P2P) communication, particularly in environments where unmanaged traffic interferes with latency-sensitive operations, and there is a need for better channel selection to prioritize low-latency applications.
Innovation Solution
The implementation of a channel selection protocol that allows devices to negotiate with other devices, systems or parts thereof that control the overall operation of the AP 101. The implementation of a system that includes a protocol for channel selection for off-channel P2P communication, enabling APs to coordinate and negotiate with each other to identify and dedicate channels for P2P communication that are not used for their infrastructure operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channels are shared for both infrastructure operations and P2P communication, then channel utilization is improved, but communication reliability deteriorates due to interference between unmanaged traffic and latency-sensitive operations
Solution Approach 1:
The patent segments the wireless channel resources by designating specific channels as off-channel P2P channels that are separate from the infrastructure operation channels. This segmentation allows P2P traffic to be isolated from unmanaged infrastructure traffic, ensuring that latency-sensitive operations are not interfered with while still utilizing available spectrum resources effectively.
Solution Approach 2:
The patent extracts P2P communication traffic from the shared infrastructure channels by dedicating specific off-channel P2P channels for exclusive P2P use. This extraction removes the harmful interaction between P2P and infrastructure traffic, allowing both to operate simultaneously without interference, thus maintaining reliability while improving overall channel utilization.
2Reliability
If a channel selection protocol is implemented for off-channel P2P communication, then communication reliability is improved by reducing interference, but device complexity increases due to negotiation requirements
Solution Approach 1:
The patent implements a self-service mechanism where access points automatically negotiate and designate off-channel P2P channels without requiring manual configuration or complex device-side negotiations. The APs autonomously identify suitable channels and configure them for P2P communication, reducing the complexity burden on individual devices while ensuring reliable interference-free operation.
Solution Approach 2:
The patent changes the operational parameters of specific channels by designating them as off-channel P2P channels with modified access rules and timing parameters. This parameter change allows the same physical medium to serve different purposes at different times, improving reliability for latency-sensitive applications without requiring additional hardware or complex device negotiations.
3Loss of time
If off-channel P2P channels are designated for exclusive P2P use, then latency performance is improved by eliminating interference, but channel availability decreases for infrastructure operations
Solution Approach 1:
The patent implements periodic action by allowing channels to alternate between infrastructure operation mode and off-channel P2P mode at scheduled intervals. During designated time periods, channels are allocated for P2P communication to ensure low latency, while at other periods they serve infrastructure operations, thereby maintaining channel versatility and availability across different timeframes.
Solution Approach 2:
The patent adds a time dimension to channel allocation by designating certain channels as off-channel P2P channels that are available for P2P communication during specific time windows. This temporal dimension allows the same channel to serve multiple purposes at different times, maintaining infrastructure channel availability while providing dedicated low-latency paths for P2P traffic when needed.
Data Source
AI summary
Methods and apparatuses for a channel selection for off-channel peer-to-peer (P2P) communication. A method performed by a first access point (AP) includes negotiating with a second AP for selecting a channel for off-channel peer-to-peer (P2P) communication among non-AP stations (STAs). The channel for off-channel P2P communication comprises a channel that the first AP, the second AP, or both the first AP and the second AP do not intend to use for operating a respective first basic service set (BSS) or a second BSS.