D2D Signal Transmission Scheduling and Subframe Management
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently managing device-to-device (D2D) signal transmission, particularly in scheduling D2D synchronization signals and channels, which can lead to interference and inefficient resource utilization.
Innovation Solution
A method for transmitting D2D signals in wireless communication systems involves performing D2D transmission scheduling for D2D synchronization signals and channels, where D2D signals are transmitted in specific subframes, and when D2D synchronization signals and channels are simultaneously scheduled, the channel is dropped from the signal, ensuring efficient resource allocation and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D synchronization signals and channels are transmitted simultaneously in the same subframe, then resource utilization is improved, but interference between signals and channels increases
Solution Approach 1:
The patent segments the D2D subframes into different types (first D2D subframes for D2DSS transmission, second D2D subframes for D2DCH transmission) to separate the transmission of synchronization signals and channels in time, thereby reducing interference while maintaining resource utilization
Solution Approach 2:
The patent implements periodic transmission patterns where D2DSS and D2DCH are transmitted in alternating subframes according to a configured pattern, allowing both signals to be transmitted regularly without simultaneous interference
2Device complexity
If D2D transmission scheduling is simplified, then device complexity is reduced, but transmission efficiency decreases
Solution Approach 1:
The network pre-configures D2D transmission parameters including subframe patterns, resource allocations, and power settings before D2D communication begins, allowing UEs to autonomously follow the configuration without complex real-time scheduling decisions
Solution Approach 2:
UEs autonomously determine whether to transmit D2DSS or D2DCH in each subframe based on pre-configured patterns and simple rules, eliminating the need for complex centralized scheduling while maintaining transmission efficiency
Data Source
AI summary
The present invention relates to a method and a device for transmitting, by a first terminal, a device-to-device (D2D) signal in a wireless communication system. Particularly, the method comprises the steps of: performing D2D transmission scheduling for a device-to-device synchronization signal (D2DSS) and a device-to-device channel (D2DCH); and transmitting a D2D signal on a first D2D subframe among a plurality of D2D subframes, wherein the first D2D subframe is a D2D subframe in which a D2D synchronization signal transmission for the first terminal is configured among D2D subframes configured to enable a D2D synchronization signal transmission, and the D2D signal drops the D2DCH when the D2DSS and the D2DCH are simultaneously scheduled on the first D2D subframe.