Wireless Resource Allocation for D2D Relay Communication
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Solution Overview
Problem
In wireless communication systems supporting device-to-device (D2D) communication, resource conflicts arise between remote UEs out of coverage and relay UEs within coverage, leading to instability in communication due to overlapping resource allocations.
Innovation Solution
A method and apparatus for allocating resources in a wireless communication system, where a relay UE transmits indication information to a base station, allowing the base station to allocate specific resources for D2D communication with remote UEs out of coverage, avoiding conflicts by using discontinuous reception (DRX) configurations or D2D gap periods, and ensuring non-overlapping resource usage through proper scheduling by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource allocation is performed without considering D2D communication requirements, then network resource utilization is improved, but resource conflicts occur between relay UE and remote UE transmissions
Solution Approach 1:
The patent segments the resource allocation process into two distinct parts: resources for relay UE transmissions and resources for remote UE D2D communications. The base station allocates specific time-frequency resources to the relay UE while configuring separate resources for remote UEs, preventing overlap and conflicts between these two communication types.
Solution Approach 2:
The patent implements preliminary resource configuration where the base station pre-allocates resources for D2D communications before actual transmissions occur. The relay UE receives indication information about designated resources in advance, and remote UEs are configured with specific time-frequency resources before initiating D2D communications, ensuring conflict-free operation.
2Adaptability or versatility
If D2D communication resources are allocated without coordination, then communication flexibility is improved, but resource overlap between relay and remote UEs occurs
Solution Approach 1:
The base station acts as an intermediary that coordinates resource allocation between relay UEs and remote UEs. It receives information from relay UEs about their resource requirements and sends indication information back, configuring appropriate resources for D2D communications while ensuring these resources do not overlap with relay UE transmissions.
Solution Approach 2:
The patent applies local quality by assigning different resource characteristics to different communication scenarios. Relay UEs receive resources optimized for their specific transmission requirements, while remote UEs receive resources configured for D2D communication needs, with each resource allocation tailored to its specific function and location in the network.
Data Source
AI summary
A resource allocation method and device capable of preventing resource conflict in a wireless communication system supporting device-to-device (D2D) communication is provided. The resource allocation method includes transmitting to a base station, by a relay user equipment (UE) located within a coverage of the base station, a message comprising indication information related to the relay UE, and performing, by the relay UE, D2D communication with a remote UE located out of the coverage by using a first resource, the first resource being allocated by the base station based on the indication information.