Wireless Anti-Collision Beacon for Multicast Time Allocation
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Solution Overview
Problem
In wireless network systems, existing anti-collision methods are inefficient during multicast data transmission as they allocate time intervals based on unicast data requirements, leading to suboptimal allocation of available time intervals for preventing collisions.
Innovation Solution
The method involves transmitting a beacon signal with information about the device type (unicast or multicast) and available time intervals, allowing neighboring devices to select and update time intervals for efficient anti-collision, specifically using multicast-specific DRP IE and DRP availability IE to differentiate between unicast and multicast environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time intervals are allocated based on unicast data requirements (assuming ACK response is needed), then anti-collision mechanism works for unicast, but time interval allocation becomes inefficient for multicast data transmission
Solution Approach 1:
The patent changes the parameter of time interval allocation by introducing owner type information (unicast/multicast differentiation) into the beacon signal. This allows the system to adjust time interval allocation parameters based on the specific transmission mode, thereby resolving the contradiction between reliable anti-collision and efficient time utilization.
Solution Approach 2:
The patent applies local quality by differentiating treatment based on transmission type. Unicast transmissions receive time interval allocation designed for ACK responses, while multicast transmissions receive optimized allocation without ACK requirements. This localized differentiation resolves the contradiction by allowing each transmission type to receive appropriate time interval treatment.
2Adaptability or versatility
If available time intervals are regarded as time intervals necessary for ACK response in multicast, then unicast anti-collision logic is maintained, but medium access slot availability decreases
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the system to switch between unicast and multicast time interval allocation modes based on the transmission type indicated in the beacon signal. This dynamic adjustment maintains compatibility with unicast logic when needed while optimizing for multicast efficiency, thereby resolving the contradiction between adaptability and slot availability.
Solution Approach 2:
The patent segments the time interval allocation process into separate handling for unicast and multicast transmissions. By segmenting the available time intervals into unicast-related intervals and multicast-related intervals, the system can independently optimize each type, maintaining unicast compatibility while increasing overall medium access slot availability for multicast.
Data Source
AI summary
An anti-collision method and system in a wireless network system are provided. The anti-collision method includes: transmitting a beacon signal including information related to an owner type of a first device and information related to an available time interval of the first device; transmitting information related to a time interval selected from the available time interval to a second device having receiving the beacon signal from the first device; and updating the information related to the available time interval using information related to the selected time interval. The information related to the owner type of the first device includes information indicating one of a unicast device and a multicast device.