D2D Synchronization Signal Transmission Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting Device-to-Device (D2D) synchronization signals (D2DSS) in D2D communication, which affects the overall quality of D2D communication and network performance.
Innovation Solution
A method for efficiently transmitting D2DSS in D2D communication systems, involving specific configurations and resource allocation strategies for D2DSS transmission, including periodicity, resource pool management, and power control, to optimize D2D communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If D2DSS transmission uses traditional base station infrastructure, then network control and management are simplified, but network load increases and base station resources are consumed
Solution Approach 1:
The patent extracts the D2D synchronization function from the base station infrastructure and implements it autonomously at the user equipment level. D2D UEs generate and transmit their own D2DSS signals without requiring base station resources, thereby removing the dependency on network infrastructure for D2D synchronization while reducing network load.
Solution Approach 2:
D2D user equipment performs self-synchronization by autonomously generating D2D synchronization signals and performing cell search and synchronization operations independently. This self-service mechanism eliminates the need for base station involvement in D2D synchronization, reducing network control complexity and resource consumption.
2Quantity of substance
If D2D communication operates independently without infrastructure, then network load is reduced, but synchronization reliability and communication quality deteriorate
Solution Approach 1:
The patent establishes predetermined rules and protocols for D2DSS generation, transmission timing, and resource allocation before D2D communication occurs. These preliminary configurations enable UEs to perform reliable synchronization autonomously without requiring real-time network intervention, ensuring synchronization reliability while operating independently.
Solution Approach 2:
The patent optimizes D2DSS transmission parameters such as periodicity, power levels, and resource allocation patterns to enhance synchronization reliability in infrastructure-less operation. By carefully adjusting these parameters, the system achieves robust synchronization performance independent of base station support.
3Speed
If multiple D2D UEs transmit D2DSS simultaneously, then discovery speed increases, but interference and collision probability increase
Solution Approach 1:
The patent segments the D2DSS transmission resources in the time and frequency domains, allocating specific resource blocks and time slots to different D2D UEs. This segmentation allows multiple UEs to transmit D2DSS simultaneously without causing harmful interference, as each UE operates in its designated resource partition.
Solution Approach 2:
The patent implements periodic D2DSS transmission with defined periodicity patterns, where UEs transmit synchronization signals at regular intervals rather than continuously or randomly. This periodic structure enables efficient discovery while reducing collision probability through predictable transmission timing and resource allocation.
Data Source
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AI summary
Disclosed is a method for transmitting a D2D synchronization signal. The method for transmitting a D2D synchronization signal according to the present application may comprise transmitting a synchronization signal from a synchronization signal resource closest to the first subframe from among the subframes previous to the first subframe if the first subframe of a discovery transmission pool does not correspond to the synchronization signal resource.