D2D Resource Broadcasting for Interference Avoidance
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Solution Overview
Problem
In wireless communication, especially for public safety events, device-to-device (D2D) terminals often experience interference due to sharing the same resources, leading to failed data reception when their geographical locations are close, even with network coverage or without it.
Innovation Solution
A resource broadcasting method where a terminal requests and declares specific frequency and time domain resources for D2D communication, allowing adjacent terminals to bypass occupied resources, thereby preventing interference by clearly indicating the resources used for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station allocates the same resource to multiple terminals based on priority and cached data amount, then resource allocation efficiency is improved, but severe interference occurs between adjacent D2D terminals causing data reception failure
Solution Approach 1:
The patent applies preliminary action by having terminals broadcast their requested frequency and time domain resources before actual data transmission. This advance declaration allows adjacent terminals to learn about occupied resources in advance and select different resources, preventing interference before it occurs while maintaining efficient resource allocation
Solution Approach 2:
The patent implements feedback through the resource declaration message broadcast mechanism. Terminals provide feedback information about their resource usage to other terminals in the network, enabling adjacent terminals to adjust their resource selection based on this feedback and avoid conflicts, thus resolving the contradiction between allocation efficiency and reception reliability
Data Source
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AI summary
The present invention relates to a resource broadcasting method and apparatus, including: sending a request message of requesting a first frequency domain resource and a first time domain resource that are used for device-to-device D2D communication; obtaining, from the first frequency domain resource obtained by requesting, a second frequency domain resource used for data transmission, and obtaining, from the first time domain resource obtained by requesting, a second time domain resource used for data transmission; and repeatedly sending a declaration message, where the declaration message includes: the second frequency domain resource and the second time domain resource. Therefore, a problem that two terminals occupy a same resource may be resolved.