LTE Terminal D2D Resource Allocation via Cell Aggregation
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Solution Overview
Problem
The existing procedures for device-to-device (D2D) signal transmission and reception in LTE systems are not efficiently managed, lacking sufficient consideration for the processes involved in D2D communication.
Innovation Solution
The implementation of a method that configures multiple serving cells for terminal devices using cell aggregation, allowing for efficient D2D signal transmission and reception by reserving specific resources for D2D communication and controlling the cyclic prefix length to optimize signal delay, while the base station apparatus allocates and manages D2D resources to improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is implemented in LTE systems, then direct communication between terminal devices is enabled, but the existing procedures for transmission and reception are not efficiently managed
Solution Approach 1:
The patent segments the D2D communication process into distinct phases: discovery phase for finding nearby devices and communication phase for actual data transfer. It further divides resource allocation into dedicated D2D resources and uses separate control mechanisms for each phase, making the complex D2D procedures more manageable and efficient.
Solution Approach 2:
The base station apparatus serves as an intermediary that manages and coordinates D2D communication between terminal devices. It allocates resources, controls transmission parameters, and facilitates the communication process, reducing the complexity burden on the terminal devices themselves.
2Adaptability or versatility
If multiple serving cells are configured for terminal devices, then resource allocation flexibility is improved, but system configuration complexity increases
Solution Approach 1:
The patent applies cell aggregation where multiple serving cells are configured to serve multiple functions: traditional cellular communication and D2D communication. The same cell structure handles both modes of communication, providing resource allocation flexibility without requiring entirely separate infrastructure, thus balancing versatility with manageable complexity.
Data Source
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AI summary
There is provided a terminal device that performs first communication with E-UTRAN, and second communication between terminal devices, the terminal device including: a reception unit that receives information relating to resource allocation for the second communication and Downlink Control Information in which information relating to a transmission terminal is included, over a downlink in the first communication, and that performs reception processing in the second communication based on the information relating to the resource allocation; and a transmission unit that performs transmission processing in the second communication based on the information relating to the resource allocation, in which, which one of the reception processing and the transmission processing that are based on the information relating to the resource allocation is performed is determined based on a control information format.