D2D Frequency Resource Configuration via Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring and managing resources for Device-to-Device (D2D) communication, leading to increased signaling overhead, suboptimal frequency diversity, and unfair resource allocation.
Innovation Solution
A method for configuring frequency resources in D2D communication systems, where the frequency resource region is divided into two regions with independent parameters determining their positions and a common parameter determining their sizes, optimizing signaling overhead and frequency diversity while ensuring fair resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If frequency resource region is configured with single unified parameter for both position and size, then signaling overhead is reduced, but resource allocation flexibility and frequency diversity are degraded
Solution Approach 1:
The frequency resource region is segmented into two distinct types: type 1 region configured by first parameters and type 2 region configured by second parameters. This segmentation allows independent optimization of different resource regions, enabling flexible allocation while maintaining manageable signaling overhead through parameter categorization.
Solution Approach 2:
Different parameter sets are applied to different frequency resource regions based on their specific requirements. The first parameters (start PRB index, end PRB index) are used for type 1 regions while second parameters (start RB index, end RB index) are used for type 2 regions, allowing each region to have optimized quality characteristics suitable for its function.
2Ease of operation
If frequency resources are allocated contiguously to D2D users, then resource allocation simplicity is improved, but frequency diversity is reduced leading to suboptimal performance
Solution Approach 1:
The frequency resource region is divided into multiple sub-regions that can be allocated to different D2D users. This segmentation enables non-contiguous resource allocation where users can be assigned dispersed frequency blocks, thereby improving frequency diversity while maintaining allocation simplicity through the standardized parameter interface.
Solution Approach 2:
The resource allocation extends from simple contiguous frequency blocks to multi-dimensional resource distribution across the frequency spectrum. By utilizing start and end PRB/RB indices, the system can allocate resources in a scattered pattern across frequency, effectively adding spatial distribution dimension to the allocation strategy.
3Reliability
If D2D communication resources are not properly configured, then cellular signal transmission resources may be fragmented, but implementing complex configuration increases device complexity
Solution Approach 1:
The frequency resource region is segmented into type 1 and type 2 regions with distinct parameter configurations. This segmentation provides a structured approach to resource management that prevents cellular signal fragmentation by clearly defining D2D resource boundaries, while the standardized parameter sets keep configuration complexity manageable.
Solution Approach 2:
The system utilizes parameter changes (first parameters vs. second parameters) to differentiate between type 1 and type 2 frequency resource regions. This parameter-based configuration approach enables precise control over resource allocation without requiring complex configuration procedures, as the same parameter structure can be reused with different values.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3~4
AI summary
A device to device (D2D) signal transmission method in which a D2D terminal transmits a D2D signal in a wireless communication system according to one embodiment of the present invention comprises the steps of: defining a time-frequency resource range in which the D2D signal is to be transmitted in a subframe; and transmitting the D2D signal through the defined time-frequency resource range, wherein the frequency resource range in which the D2D signal is to be transmitted in the subframe includes a first frequency resource range and a second frequency resource range, positions of the first frequency resource range and the second frequency resource range are defined by an independent parameter, and dimensions of the first frequency resource range and the second frequency resource range are defined by a common parameter.