D2D Communication Resource Multiplexing Without Base Station
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Solution Overview
Problem
In cellular mobile communication systems, when a transmitter and receiver are close, the centralized control mode leads to inefficient information transmission and high radio resource consumption due to the need for duplicate resources, reducing overall efficiency.
Innovation Solution
A D2D communication method that determines a second time slot for data transmission based on a synchronous relationship with signaling, and uses uplink control information from cellular communication to spatially multiplex radio resources, allowing D2D communication without base station control, thereby improving resource utilization and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If centralized control mode is adopted for cellular communication, then system capacity is improved through frequency reuse, but transmission efficiency deteriorates when transmitter and receiver are close due to double resource consumption
Solution Approach 1:
The patent extracts the control function from the centralized base station and enables direct device-to-device communication. The transmitting device autonomously selects resources and performs transmission without base station involvement, eliminating the need for twice resource consumption while maintaining system capacity through controlled frequency reuse.
Solution Approach 2:
The transmitting device performs self-service by autonomously selecting time-frequency resources, determining transmission parameters, and executing D2D communication without base station assistance. This self-organized approach resolves the contradiction by enabling efficient direct transmission while maintaining overall system coordination.
2Productivity
If D2D communication uses independent resource allocation, then transmission efficiency is improved, but radio resource utilization deteriorates due to resource waste
Solution Approach 1:
The patent makes radio resources universal by enabling them to serve both cellular communication and D2D communication purposes. The same time-frequency resources can be dynamically allocated to either cellular or D2D transmissions based on demand, improving both transmission efficiency and resource utilization simultaneously.
Solution Approach 2:
The resource allocation is made dynamic rather than static. The transmitting device can flexibly select from available resources based on channel conditions, traffic demands, and interference levels, optimizing both transmission efficiency and overall resource utilization through adaptive resource management.
3Productivity
If base station control is eliminated for D2D communication, then transmission efficiency is improved, but device complexity increases due to autonomous resource management
Solution Approach 1:
The patent applies preliminary action by having devices pre-select resources from available pools and pre-establish transmission parameters before actual D2D communication occurs. This preparation reduces the complexity of real-time autonomous decision-making while maintaining high transmission efficiency through advance resource allocation.
Data Source
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AI summary
The present invention provides a D2D communication method and a D2D communication device. The method includes: determining a second time slot for transmitting D2D data according to a first time slot for transmitting D2D signaling to a D2D receiver and a synchronous transmission relationship between the D2D signaling and the D2D data, the second time slot being after the first time slot; determining a third time slot for transmitting uplink control information in cellular communication according to the second time slot, the uplink control information being used for indicating an uplink radio resource in the second time slot of a cellular user equipment UE, and the third time slot being before the second time slot; demodulating the uplink control information in the third time slot to acquire the uplink radio resource in the second time slot of the cellular UE; multiplexing the uplink radio resource in the second time slot of the cellular UE to perform D2D communication with the D2D receiver. In the embodiments of the present invention, the D2D transmitter and the D2D receiver perform D2D communication by space division multiplexing the uplink radio resource of the cellular UE in the cellular communication, without control of a base station, so as to improve transmission efficiency and radio resource utilization.