D2D Resource Pool Overlap for Seamless Coverage Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in ensuring reliable Device-to-Device (D2D) operation, particularly in transitioning between network coverage and outside coverage, where the relationship between resources used for D2D communication within and outside network coverage is not effectively managed, affecting signal reliability and efficiency.
Innovation Solution
A method where a terminal receives resource pool information for D2D signal transmission within cell coverage and selects resources that overlap between the first resource pool usable within coverage and the second resource pool usable outside coverage, allowing for seamless D2D signal transmission by using these overlapping resources, with optional transfer of resource pool information to terminals outside the cell coverage based on threshold values and scheme information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal uses separate resource pools for D2D operation inside and outside network coverage, then resource management flexibility is improved, but resource utilization efficiency deteriorates due to potential overlap and transitions between coverage areas
Solution Approach 1:
The patent merges the first resource pool (for in-coverage D2D operation) and the second resource pool (for out-of-coverage D2D operation) by identifying and utilizing overlapping resources between them. When a terminal transitions from out-of-coverage to in-coverage area, it can continue using the second resource pool if it overlaps with the first resource pool, thereby combining the benefits of both separate resource pools while eliminating the inefficiency of duplicate resource allocation.
2Reliability
If the terminal frequently changes resource pools during coverage transitions, then communication reliability is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring both the first resource pool (for in-coverage operation) and the second resource pool (for out-of-coverage operation) in the terminal before coverage transitions occur. The network provides configuration information for both resource pools in advance, so when the terminal transitions between coverage areas, it can immediately switch to the appropriate pre-configured resource pool without complex real-time negotiation or signaling, thereby maintaining communication reliability while reducing system complexity.
Data Source
AI summary
A method for device-to-device (D2D) operation performed by a terminal in a wireless communication system, and a terminal using the method are provided. The method comprises: receiving, from a cell, resource pool information indicating a first resource pool which may be used in transmitting a D2D signal within the coverage of the cell; and transmitting a D2D signal by using overlapping resources between the first resource pool, and a second resource pool which may be used in the D2D operation outside the coverage of the cell.