Terminal Device D2D Communication Resource Configuration
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Solution Overview
Problem
Existing technologies for Device-to-Device (D2D) communication in LTE systems have not adequately addressed the efficient performance of D2D communication, particularly in terms of resource allocation, link management, and power control, leading to suboptimal D2D communication efficiency.
Innovation Solution
A terminal device and integrated circuit that enable efficient D2D communication through advanced resource management, including cell aggregation, dynamic resource allocation, and adaptive power control, using techniques such as carrier aggregation, adaptive modulation, and adaptive power control for D2D signals, allowing for efficient D2D link establishment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a subset of resource blocks is reserved for D2D communication, then D2D communication can be established, but resource allocation efficiency deteriorates due to insufficient consideration of terminal device processing requirements
Solution Approach 1:
The patent applies dynamics by making the D2D resource configuration adaptive rather than static. The base station dynamically adjusts D2D resource allocations based on terminal device processing capabilities, channel conditions, and traffic requirements. This allows the system to optimize D2D communication efficiency while maintaining reliable connection establishment across varying operational conditions.
Solution Approach 2:
The patent changes key parameters including resource block allocation sizes, power control settings, and modulation schemes based on terminal device processing abilities. By adjusting these parameters according to device capabilities, the system achieves both reliable D2D establishment and improved communication efficiency without one compromising the other.
2Productivity
If multiple cells are aggregated for D2D communication, then resource utilization improves, but device complexity increases
Solution Approach 1:
The base station serves as an intermediary that manages cell aggregation for D2D communication. It performs the complex tasks of coordinating multiple cells, managing resource allocations, and controlling power settings. This relieves terminal devices from handling the complexity of multi-cell processing while still enabling improved resource utilization through carrier aggregation.
Solution Approach 2:
The patent segments the complexity management by separating control functions. The base station handles high-level coordination and resource management across multiple cells, while terminal devices focus on executing specific transmission and reception tasks. This segmentation allows resource utilization to improve through multi-cell aggregation without proportionally increasing terminal device complexity.
3Reliability
If adaptive power control is implemented for D2D signals, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The patent implements partial power control where terminal devices apply adaptive power adjustments only to the extent necessary for maintaining reliable D2D links. Rather than continuously maximizing power transmission, the system uses just enough power control to ensure link reliability, thereby reducing overall energy consumption while maintaining communication stability.
Data Source
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AI summary
A first parameter that is used for configuration of a cyclic prefix for transmission of first information is configured, a second parameter that is used for configuration of a cyclic prefix for transmission of second information is configured, and one third parameter that is used for configuration of cyclic prefixes for transmission of a first synchronization signal, transmission of third information, transmission of a second synchronization signal, and transmission the fourth information, and that is common to the transmission of the first synchronization signal, the transmission of the third information, the transmission of the second synchronization signal, and the transmission of the fourth information is configured.