Spatial Reuse Mechanism for Wi-Fi Direct Interference Reduction
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Solution Overview
Problem
In wireless communication environments with multiple Wi-Fi direct devices, transmission interference occurs between infrastructure network transmissions and peer-to-peer transmissions, necessitating a novel transmission schedule mechanism to flexibly manage transmission behaviors and reduce interference.
Innovation Solution
A communication device employs a spatial reuse mechanism to generate and transmit spatial reuse information, defining a communication period with a spatial reuse phase and a non-spatial reuse phase, where wireless signal transmission is suspended during the spatial reuse phase to minimize interference, allowing peer-to-peer communication to occur without overlapping with infrastructure network transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a transmission schedule mechanism is implemented to reduce interference between infrastructure network transmissions and peer-to-peer transmissions, then transmission interference is reduced, but device complexity increases
Solution Approach 1:
The communication period is segmented into distinct phases: spatial reuse phases and non-spatial reuse phases. This segmentation allows the system to alternate between allowing and disallowing peer-to-peer transmissions, thereby reducing interference with infrastructure network transmissions while maintaining manageable device complexity through structured time division.
Solution Approach 2:
The patent implements periodic spatial reuse information transmission where the access point periodically sends spatial reuse information to peer-to-peer devices. This periodic action creates a rhythmic pattern of allowed and disallowed transmission periods, reducing interference while keeping the scheduling mechanism relatively simple and predictable.
2Object-affected harmful factors
If spatial reuse information is transmitted periodically to coordinate peer-to-peer communications, then transmission interference is reduced, but loss of time occurs due to coordination overhead
Solution Approach 1:
The access point transmits spatial reuse information in advance before peer-to-peer transmissions occur. This preliminary action allows peer-to-peer devices to know in advance when they are allowed to transmit, enabling them to prepare and execute transmissions during approved spatial reuse phases without last-minute coordination delays.
3Productivity
If peer-to-peer transmissions are allowed during spatial reuse phases, then communication efficiency improves, but transmission interference with infrastructure network increases
Solution Approach 1:
The system dynamically adjusts the timing and duration of spatial reuse phases based on current network conditions and traffic requirements. The access point can modify when spatial reuse information is transmitted and how long spatial reuse phases last, allowing peer-to-peer communications to proceed efficiently during approved windows while adapting to prevent interference with infrastructure network transmissions as conditions change.
Data Source
AI summary
A communication device respectively establishes a plurality of wireless communication connections with a plurality of predetermined devices in an infrastructure network, and includes a wireless transceiver and a processor. The wireless transceiver transmits or receives wireless signals. The processor selects a spatial reuse mechanism, generates spatial reuse information according to the spatial reuse mechanism, and transmits at least one packet carrying the spatial reuse information to the predetermined devices. The spatial reuse information defines a pattern of a communication period. The communication period comprises a spatial reuse phase and a non-spatial reuse phase. The spatial reuse information comprises time information of at least one of the spatial reuse phase and the non-spatial reuse phase. In response to a selection of the spatial reuse mechanism, the processor suspends a wireless signal transmission with the predetermined devices during the spatial reuse phase.