D2D Resource Allocation via Cluster Head Relaying
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Solution Overview
Problem
In wireless communication systems, device-to-device (D2D) communication faces challenges in reducing interference during resource allocation, particularly in scenarios where UEs have varying distances, leading to inefficient resource utilization and increased network load.
Innovation Solution
A method and apparatus for D2D resource allocation that involves receiving and transmitting D2D resource allocation information between cluster heads, using a relaying mechanism to allocate resources efficiently and minimize interference by grouping UEs with similar distances for shared time resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is implemented to distribute traffic from eNB, then network load is reduced, but interference between UEs with varying distances increases
Solution Approach 1:
The patent segments UEs into different groups based on their distance from the serving eNB. By dividing the UE population into distance-based segments, the system can allocate different time resources to each segment, thereby preventing interference between near and far UEs while maintaining traffic distribution benefits.
Solution Approach 2:
The patent applies local quality by providing differentiated time resource allocation to different UE groups based on their specific distance characteristics. Each UE group receives tailored time resources suited to its distance from the eNB, optimizing performance while minimizing interference.
2Device complexity
If time resources are allocated without considering UE distance, then resource allocation is simple, but interference increases and resource utilization becomes inefficient
Solution Approach 1:
The patent introduces segmentation of UEs by distance, which adds structured complexity to resource allocation. This segmentation enables the system to manage interference systematically through distance-based grouping, transforming an unmanaged complexity problem into a structured solution.
3Ease of manufacture
If D2D communication is enabled without resource allocation optimization, then implementation is straightforward, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements segmentation of time resources according to UE distance groups, creating a scalable framework that maintains implementation simplicity while significantly improving resource utilization efficiency through targeted resource allocation.
Solution Approach 2:
The patent changes the allocation parameter from uniform time resources to distance-based differentiated time resources. This parameter change optimizes resource utilization by matching time resource characteristics to the specific propagation conditions of each UE group.
Data Source
AI summary
The present invention relates to a method and apparatus for allocating D2D resources using relay UE in a wireless communication system supporting D2D communication. The method may include receiving D2D resource allocation information related to a first resource set used in a first cluster from the head UE of the first cluster and transmitting the received D2D resource allocation information to head UE of a second cluster. The D2D resource allocation information includes at least one of D2D resource set configuration information indicative of a configuration of D2D resource sets used in D2D communication, D2D resource set use information indicative of a D2D resource set which is now used, and D2D resource set indication information indicative of a D2D resource set to be used in a next cluster. The D2D resource set is allocated for each cluster.