D2D Terminal Resource Allocation via DCI CRC Check
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently utilizing resources for device-to-device (D2D) communication, leading to increased overhead and potential interference, especially in scenarios where D2D communication overlaps with traditional cellular communication.
Innovation Solution
A method for D2D user equipment to perform cyclic redundancy checks (CRC) using a D2D RNTI on received DCI, allowing D2D communication on allocated resources only if the CRC is errorless and the TPC field value is a preset value, enabling the reuse of uplink resources for downlink signals and reducing overhead by distinguishing between D2D and cellular communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If D2D communication is implemented without intervention of eNB, then overhead of network is reduced, but resource overhead and interference increase due to inefficient resource utilization
Solution Approach 1:
The base station performs preliminary actions by allocating specific resources for D2D communication and configuring D2D parameters to user equipment before D2D communication occurs. This preliminary configuration enables efficient resource utilization and reduces interference by ensuring D2D transmissions occur on designated resources with appropriate parameters.
Solution Approach 2:
The base station acts as an intermediary that coordinates D2D communication resources and parameters. By maintaining control over resource allocation and configuration, the base station mediates between D2D communication needs and overall network resource management, reducing interference while maintaining efficient overhead.
2Productivity
If D2D communication resources are allocated without distinction from cellular resources, then resource utilization increases, but interference and overhead increase
Solution Approach 1:
Resources are segmented into specific D2D communication resources and cellular communication resources. The base station allocates dedicated time-frequency resources for D2D transmissions and configures specific D2D parameters, creating distinct resource pools that prevent interference between D2D and cellular communications while maintaining high overall resource utilization.
Solution Approach 2:
Different resource qualities and characteristics are applied to different communication types. D2D resources are configured with specific parameters optimized for direct device communication, while cellular resources maintain their traditional characteristics. This local differentiation enables efficient resource utilization without causing interference.
3Adaptability or versatility
If D2D communication is enabled on uplink resources, then resource flexibility increases, but confusion between uplink and downlink functions occurs
Solution Approach 1:
The system dynamically adapts resource usage based on communication needs. Uplink resources can be dynamically allocated for D2D communication when needed, while maintaining their fundamental uplink characteristics through configured parameters. The base station dynamically controls resource allocation and parameter configuration to maintain clarity between uplink and downlink functions while enabling flexible resource usage.
Data Source
AI summary
One embodiment of the present invention is a method for a device-to-device (D2D) terminal to transmit and receive a signal in a wireless communication system, the method comprising: receiving downlink control information (DCI) comprising resource allocation information; checking the cyclic redundancy check (CRC) of the DCI by using a D2D radio network temporary identifier (RNTI); and, if there is no error in the result of the CRC check, performing D2D communication on resources denoted in the resource allocation information, wherein if the TPC field of the DCI is a pre-set value, a downlink signal is received from a base station on resources denoted in the resource allocation information.