D2D Pilot Channel Allocation for Interference Reduction
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Solution Overview
Problem
In high-density cellular networks, D2D communication faces interference with cellular communication due to shared frequency resources, which affects overall system throughput.
Innovation Solution
A D2D communication control method that allocates a pilot channel resource for directional pilot signals and sends information associated with this resource to enable better control and reduce interference by using directional transmission capabilities, such as beam forming with smart antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication uses shared frequency resources with cellular communication, then frequency spectrum efficiency is improved, but interference between D2D and cellular users increases
Solution Approach 1:
The patent segments the frequency resources by introducing dedicated pilot channel resources for D2D communication, separating the pilot signaling resources from cellular communication resources. This allows D2D data channels to share frequency resources with cellular users while maintaining distinct pilot channels for accurate channel estimation, thereby reducing interference and improving spectrum efficiency simultaneously.
Solution Approach 2:
The patent introduces a base station as an intermediary that allocates and manages pilot channel resources for D2D communication. The base station coordinates resource allocation between cellular and D2D users, ensuring that pilot channels are properly separated while allowing data channels to share frequency resources, thus mediating the interference issue while maintaining spectrum efficiency.
2Ease of operation
If directional pilot signals are allocated for D2D communication, then control efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the communication resources by allocating specific pilot channel resources for directional D2D communication, separating pilot signaling from data transmission. This segmentation enables independent optimization of pilot signal allocation for directional beams while maintaining standard data channel procedures, improving control efficiency without significantly increasing overall system complexity.
Solution Approach 2:
The patent performs preliminary allocation of pilot channel resources before D2D communication begins. The base station pre-allocates specific time-frequency resources for directional pilot signals, enabling terminals to perform channel estimation and beam alignment in advance. This preliminary action simplifies the actual communication process and improves control efficiency while keeping system complexity manageable through standardized resource allocation procedures.
Data Source
AI summary
Device to device (D2D) communication control is provided. A method comprises: allocating a pilot channel resource for at least one directional pilot signal associated with directional D2D communication; and sending information associated with the pilot channel resource. A respective pilot channel resource for a direction pilot signal can be allocated for each direction D2D communication, thereby providing a basis for better control of the D2D communication.