D2D Communication Resource Allocation and Power Control
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Solution Overview
Problem
Current Device-to-Device (D2D) communication methods face challenges in various network coverage situations, power consumption, interference minimization, and dynamic cluster size and transmission power allocation in wireless communication systems.
Innovation Solution
A method for D2D communication that involves a D2D transmitting terminal requesting radio resource allocation from a base station or cluster head, with data transmission through allocated radio resources, including a guard interval for mode switching, and adaptive cluster size and power control based on cell loading factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is implemented without base station involvement, then network load is reduced and data transmission speed increases, but network coverage and reliability deteriorate
Solution Approach 1:
The patent introduces a base station as an intermediary that provides control and coordination functions for D2D communication. The base station allocates radio resources, manages cluster formations, and oversees communication between D2D terminals, enabling direct communication while maintaining network coverage and reliability through centralized control.
2Reliability
If D2D terminals continuously monitor and transmit signals, then communication reliability improves, but power consumption increases
Solution Approach 1:
The patent implements periodic monitoring and transmission schemes where D2D terminals alternate between active communication phases and sleep phases. Terminals monitor control channels at specific intervals, transmit data only when necessary, and enter low-power states during idle periods, thereby maintaining communication reliability while significantly reducing average power consumption.
3Productivity
If multiple D2D terminals transmit simultaneously, then network capacity increases, but interference among terminals worsens
Solution Approach 1:
The patent segments the network into multiple clusters, each managed by a cluster head terminal. By dividing the network into smaller groups with dedicated resource allocation, simultaneous transmissions are coordinated within clusters, reducing inter-cluster interference while maintaining overall network capacity through parallel cluster operations.
4Device complexity
If cluster size is increased to reduce overhead, then signaling efficiency improves, but transmission power requirements increase
Solution Approach 1:
The patent implements dynamic cluster size adjustment where cluster heads and member terminals are selected based on channel conditions, location, and traffic requirements. Cluster sizes vary adaptively - larger clusters in low-interference areas reduce overhead, while smaller clusters in high-interference areas minimize transmission power requirements, optimizing the trade-off between signaling efficiency and power consumption.
Data Source
AI summary
A method for performing Device-to-Device (D2D) communication in a wireless communication system according to the present invention, the method according to the present invention comprises transmitting, by a D2D transmitting UE, a first message requesting allocation of radio resources to be used for D2D communication to an eNB; receiving, by the D2D transmitting UE, a second message including radio resource allocation information from the eNB; and transmitting, by the D2D transmitting UE, data through a radio resource area allocated by the second message, wherein the data are transmitted to the eNB and at least one D2D receiving UE.