Base Station D2D Resource Allocation for Collision Prevention
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing device-to-device (D2D) communication, particularly in preventing resource collisions and allocating resources for D2D communication request signals between D2D devices and legacy terminals.
Innovation Solution
A method is introduced where a base station receives signals from D2D devices, allocates resources for transmitting D2D communication request signals based on the number of devices, and transmits information on the allocated resources, discriminating them in time, frequency, code, or spatial domains, allowing D2D devices to transmit signals efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If resources are allocated for D2D communication request signals without discrimination, then resource allocation simplicity is improved, but resource collision between D2D devices and legacy terminals occurs
Solution Approach 1:
The resource pool is segmented into multiple resource regions, where each region is dedicated to specific combinations of D2D device indices (transmitter and receiver). This segmentation allows legacy terminals to access certain regions while D2D devices use others, preventing resource collisions while maintaining systematic allocation
Solution Approach 2:
Different resource regions are assigned different qualities or characteristics based on the communication needs of specific device pairs. Each resource region is optimized for its intended use, with allocation patterns that reflect the local requirements of the corresponding D2D device combinations
2Reliability
If resource regions are allocated for each combination of D2D device indices, then resource collision prevention is improved, but resource allocation complexity increases
Solution Approach 1:
The resource allocation is made dynamic through the use of indices that can be configured and updated by the base station. The resource region for each device combination is determined dynamically based on current system conditions, device availability, and traffic requirements, rather than being statically fixed
Solution Approach 2:
The base station receives feedback about D2D communication requests and device states, then adjusts resource region allocations accordingly. This feedback mechanism allows the system to adapt resource allocation to actual needs, reducing complexity by only allocating resources where and when they are required
3Loss of energy
If D2D communication is implemented without base station support, then network load reduction is improved, but resource management efficiency deteriorates
Solution Approach 1:
The base station acts as an intermediary that coordinates D2D communication resource allocation without requiring full base station involvement in every transmission. It provides centralized resource management information that enables distributed D2D devices to communicate efficiently, reducing network load while maintaining resource management effectiveness
Solution Approach 2:
D2D devices use the allocated resource regions to autonomously establish and maintain communications without continuous base station intervention. Once resources are allocated by the base station, devices self-manage their communications within those resources, achieving both network load reduction and efficient resource utilization
Data Source
AI summary
Method for supporting device-to-device (D2D) communication by a base station includes: receiving first signals for requesting D2D communication from a plurality of first D2D devices; identifying number of D2D devices which have requested the D2D communication based upon the first signals; allocating resources for transmitting a second signal for requesting D2D communication between the D2D devices based upon number of the plurality of first D2D devices which have been identified; and transmitting information on the allocated resources to the plurality of first D2D devices, wherein the resource allocation can be performed to distinguish combinations of an index of a D2D device, which transmits the second signal, and an index of a D2D device, which receives the second signal, from each other with respect to at least one of time, frequency, code, and space domains with respect to the plurality of first D2D devices.