RFID Reader Sensing Resource Scheduling for Interference Mitigation
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Solution Overview
Problem
In radio frequency identification (RFID) systems, strong interference between multiple readers communicating with tags on the same resource reduces communication performance.
Innovation Solution
A method and apparatus that utilize scheduling information to allocate separate resources for sensing signals among readers, allowing them to determine optimal communication resources based on mutual interference, thereby reducing interference and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple readers communicate with tags on the same resource, then resource utilization is improved, but strong interference between readers reduces communication performance
Solution Approach 1:
The patent applies preliminary action by introducing a sensing phase before the actual communication phase. Readers perform sensing operations in advance to detect the presence and state of tags and assess interference conditions from other readers. Based on these preliminary sensing results, readers determine appropriate communication resources and timing, thereby avoiding strong interference while maintaining high resource utilization.
2Productivity
If readers use the same resource to communicate with tags, then communication efficiency is improved, but interference between readers increases
Solution Approach 1:
The patent implements feedback mechanisms where readers transmit sensing results to the network device, and the network device provides feedback in the form of second information indicating determined communication resources. This feedback loop enables dynamic resource allocation based on real-time sensing data, allowing the system to optimize communication efficiency while minimizing reader interference through informed resource selection.
Solution Approach 2:
The network device serves as an intermediary that coordinates resource allocation among multiple readers. It receives sensing information from readers, processes this information to determine optimal communication resources, and distributes the determined resources back to readers. This intermediary role enables centralized optimization of resource allocation, reducing interference while maintaining high communication efficiency.
Data Source
AI summary
A sensing communication method and an apparatus that may resolve a problem of mutual interference caused when different readers use a same resource to communicate with a tag. A network device schedules a sensing resource of the reader to the reader. The reader sends a sensing signal based on the scheduled sensing resource, and senses a sensing signal of another reader, to obtain a sensing result. The reader sends the sensing result. The reader receives information for determining a resource for communication between the reader and the tag. The reader uses the communication resource to communicate with the tag. The sensing resource is scheduled by the network device, so that communication efficiency between the reader and the tag can be improved.