User Terminal Sounding Reference Signal Suppression for D2D Coexistence
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Solution Overview
Problem
Current mobile communication systems lack a framework to enable the coexistence of cellular communication and Device to Device (D2D) communication, leading to interference issues due to overlapping radio resources.
Innovation Solution
A mobile communication system where user terminals stop transmitting sounding reference signals in overlapping radio resources assigned to D2D communication, allowing both cellular and D2D communications to coexist by adjusting resource allocation and transmission patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sounding reference signal transmission is maintained in overlapping radio resources, then cellular communication channel estimation is improved, but D2D communication reliability deteriorates due to resource conflict
Solution Approach 1:
The patent extracts the sounding reference signal transmission from the overlapping radio resources specifically for D2D communication scenarios. When radio resources for sounding reference signal transmission overlap with D2D communication resources, the sounding reference signal transmission is excluded from these overlapping resources, thereby resolving the resource conflict while maintaining D2D communication reliability
Solution Approach 2:
The patent implements dynamic adjustment of sounding reference signal transmission based on the presence of D2D communication. The system dynamically determines whether to transmit sounding reference signals in specific radio resources by checking for overlaps with D2D resources, making the transmission behavior adaptive rather than static
2Productivity
If D2D communication resources are allocated without considering sounding reference signal transmission, then D2D communication capacity is improved, but cellular communication quality deteriorates due to resource interference
Solution Approach 1:
The patent performs preliminary identification of overlapping radio resources between sounding reference signal transmission and D2D communication before actual transmission occurs. By detecting the overlap in advance, the system can prevent resource conflicts from arising, ensuring both D2D communication capacity and cellular communication quality are maintained
3Adaptability or versatility
If a framework for coexistence is implemented, then system adaptability is improved, but device complexity increases due to additional resource management requirements
Solution Approach 1:
The patent introduces a resource overlap detection mechanism as an intermediary layer between sounding reference signal transmission and D2D communication resource allocation. This intermediary function identifies overlapping resources and coordinates transmission decisions, enabling coexistence without requiring complex restructuring of the overall system architecture
Data Source
AI summary
In a mobile communication system, comprising: a user terminal that performs communication with a base station and Device to Device (D2D) communication, the user terminal transmits a sounding reference signal to the base station. When at least a part of a first radio resource assigned to transmission of the sounding reference signal overlaps a second radio resource assigned to the D2D communication, the user terminal stops transmitting the sounding reference signal in the first radio resource.