LTE-NR Terminal Coordination Across Overlapping Sidelink Pools
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Solution Overview
Problem
Existing wireless communication systems face challenges in sharing resources between device-to-device direct communications that use different Radio Access Technologies (RATs), as signals and resource definitions differ, making collision avoidance and resource detection difficult.
Innovation Solution
A terminal is equipped with a communication unit capable of operating in overlapping resource pools of multiple RATs, with a control unit that manages shared channel transmission using information from another RAT to coordinate operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals use different RATs for D2D communication with separate resource pools, then each RAT can operate independently with its own signal definitions, but resource sharing between different RATs becomes difficult and collision avoidance cannot be performed
Solution Approach 1:
The patent merges the resource pool configurations of different RATs by allowing overlapping resource pools for LTE and NR sidelinks. The terminal determines resources for one RAT based on resource usage information from another RAT, effectively combining the resource management of multiple RATs into a coordinated system that enables resource sharing while maintaining independent operation through unified resource pool definitions
Solution Approach 2:
The patent implements multi-functionality by enabling the same physical resource pool to serve multiple RATs (LTE and NR) simultaneously. The resource pool is configured to support both LTE sidelink and NR sidelink operations, allowing a single resource pool structure to fulfill multiple communication standards' requirements through flexible resource allocation and sensing mechanisms
2Adaptability or versatility
If resource pools of different RATs are made to overlap to enable resource sharing, then resource utilization improves, but signal detection and collision avoidance become difficult due to different signal definitions
Solution Approach 1:
The patent introduces an intermediary sensing mechanism that mediates between different RAT signals. The terminal performs sensing operations on the shared resource pool to detect resource usage by other terminals regardless of RAT type. This intermediary sensing process translates different RAT signal formats into a common resource usage understanding, enabling collision avoidance despite different signal definitions
Solution Approach 2:
The patent changes the detection parameters by using resource pool configuration information and sensing results to determine resource availability. Instead of relying on RAT-specific signal detection, the system uses configurable sensing parameters and resource indication fields that can interpret resource usage across different RATs, transforming the detection approach from signal-specific to resource-oriented
Data Source
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AI summary
A terminal includes: a communication unit configured to perform transmission and reception in a resource pool of a first RAT (Radio Access Technology) and a resource pool of a second RAT, the resource pools overlapping with each other; and a control unit configured to control communications in the resource pool of the first RAT. The control unit determines an operation related to shared channel transmission in a unit time in which a feedback channel is configured in the resource pool of the first RAT, by using information in the second RAT.