Sidelink Resource Pool Adjustment for Unlicensed Band Interference
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Solution Overview
Problem
Current sidelink communication systems in wireless telecommunications, particularly in unlicensed bands, face challenges such as interference from hidden nodes, which can lead to unreliable data transmission and reduced network coverage.
Innovation Solution
The proposed solution involves enhancing the SidelinkUEInformationNR RRC message to include additional information for the base station (gNB) to determine interference likelihood in unlicensed sidelink communication. This includes reporting interested frequencies and frequencies with detected interference, allowing the gNB to adjust resource pools accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sidelink communication is enabled in unlicensed bands to improve network coverage and flexibility, then geographic coverage and service accessibility are improved, but interference from hidden nodes increases causing unreliable data transmission
Solution Approach 1:
The patent implements a feedback mechanism where User Equipment (UE) reports interference conditions and resource availability back to the base station (gNB). The gNB uses this feedback information to dynamically adjust and reconfigure sidelink resource pools, ensuring reliable communication by avoiding interfered frequencies and time resources.
Solution Approach 2:
The patent dynamically changes communication parameters including frequency selection, time resource allocation, and power control settings based on reported interference conditions. The gNB adjusts sidelink resource pool configurations by modifying frequency offsets, time resource patterns, and transmission power levels to adapt to changing channel conditions and eliminate interference.
2Reliability
If resource pools are dynamically adjusted based on interference reports to reduce interference, then transmission reliability is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent introduces the base station (gNB) as an intermediary that centralizes the complexity of resource pool management. Instead of requiring complex distributed coordination between UEs, the gNB receives interference reports and autonomously determines optimal resource pool configurations, simplifying the overall system architecture while maintaining reliability.
Solution Approach 2:
The patent uses existing RRC signaling mechanisms and resource pool configuration frameworks for multiple purposes: initial resource allocation, interference reporting, and dynamic reconfiguration. By leveraging existing multi-functional protocols, the patent avoids creating entirely new complex signaling systems while achieving reliable interference management.
3Difficulty of detecting and measuring
If interference reporting mechanisms are implemented to detect hidden node interference, then interference detection capability is improved, but signaling overhead and processing requirements increase
Solution Approach 1:
The patent implements partial interference reporting where UEs report only when interference exceeds certain thresholds or when specific conditions are met, rather than continuously reporting all channel conditions. This selective reporting approach provides sufficient information for the gNB to make informed resource allocation decisions while minimizing signaling overhead.
Solution Approach 2:
The patent establishes predetermined reporting triggers and thresholds that are configured in advance through RRC signaling. UEs are pre-configured with interference detection criteria and reporting formats, allowing them to efficiently identify and report only relevant interference conditions without requiring complex real-time analysis or excessive signaling for configuration.
Data Source
AI summary
A wireless telecommunications apparatus for use in a wireless telecommunications network is provided. The wireless telecommunications apparatus comprises communication circuitry configured to transmit or receive a wireless signal over a sidelink interface using one or more unlicensed resources; and control circuitry configured to determine whether there is a preference not to use the one or more unlicensed resources, and if there is a preference not to use the one or more unlicensed resources, control the communication circuitry to transmit a signal to the wireless telecommunications network indicating the preference not to use the one or more unlicensed resources.