Directional D2D Communication Pilot Signal Resource Allocation
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Solution Overview
Problem
In high-density cellular networks, D2D communication faces interference when sharing or reusing frequency resources with cellular users, leading to reduced system throughput due to mutual interference between D2D and co-frequency cellular users.
Innovation Solution
A D2D communication method that involves acquiring and utilizing directional pilot signals to determine optimal pilot channel resources for directional D2D communication, allowing for effective data signal transmission by controlling transmit power and resource allocation based on interference and channel conditions, thereby reducing interference with co-frequency cellular users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication shares or reuses frequency resources with cellular users, then frequency spectrum efficiency is improved, but mutual interference increases and system throughput decreases
Solution Approach 1:
The patent applies directional transmission to create spatial separation between D2D and cellular users. By transmitting pilot signals and data in specific directions using beamforming techniques, the system achieves localized communication quality improvement while minimizing interference to other users sharing the same frequency resources.
Solution Approach 2:
The patent dynamically adjusts transmission parameters including beam direction, pilot power, and data power based on channel conditions and interference levels. The network device configures different transmission parameters for directional D2D communication compared to traditional omnidirectional communication, enabling adaptive optimization of spectrum efficiency while controlling interference.
2Measurement precision
If directional pilot signals are used for directional D2D communication, then transmission accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the communication process into distinct phases: pilot signal transmission for channel estimation, followed by data transmission. Directional pilot signals are transmitted first to establish channel characteristics and beam directions, which are then used to guide subsequent data transmission. This segmentation simplifies the overall system by breaking down the complex directional communication task into manageable steps.
Solution Approach 2:
The patent performs preliminary channel estimation using directional pilot signals before actual data transmission. The network device uses the pilot signals to pre-determine optimal beam directions and transmission parameters, which are then applied during data transmission. This preliminary action reduces the complexity of real-time directional control during data transmission.
Data Source
AI summary
Device to device (D2D) communication is provided. A method comprises: acquiring information associated with a pilot channel resource used to send at least one directional pilot signal associated with directional D2D communication; and transmitting a data signal associated with the directional D2D communication at least according to a received state of the pilot signal on the pilot channel resource. Accordingly, a data signal associated with directional D2D communication can be transmitted more effectively according to a directional pilot signal related to the directional D2D communication.