D2D Synchronization Signal Resource Allocation in Asynchronous Networks
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Solution Overview
Problem
Current 5G communication systems lack specifications for determining D2D synchronization signal transmission timing and resource allocation for D2D communication, particularly in asynchronous networks, leading to inefficiencies in data transmission and reception between devices in different cells.
Innovation Solution
A method and apparatus for allocating resources for synchronization between transmitter and receiver in D2D communication systems, involving the transmission of system information blocks with resource allocation details, determining the need for D2D synchronization signals, and scheduling their transmission, as well as configuring reception windows based on received synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D synchronization signal transmission is implemented in asynchronous networks without standardized resource allocation rules, then device-to-device communication can be established between cells, but resource allocation inefficiency and transmission timing conflicts occur
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting D2D synchronization signal transmission parameters including timing offsets, frequency resources, and power levels based on network conditions, cell synchronization status, and device requirements. This allows the system to adapt resource allocation to varying network scenarios while maintaining efficient spectrum utilization and avoiding transmission conflicts in asynchronous D2D communication between cells
Solution Approach 2:
The patent implements dynamics by enabling flexible and adaptive resource allocation mechanisms where D2D synchronization signal transmission timing and resources are dynamically determined rather than fixed. The system can switch between different transmission modes, adjust resource grants in real-time, and adapt to changing network conditions, thereby improving resource allocation efficiency while maintaining versatile D2D communication capability across asynchronous cell boundaries
2Area of stationary object
If multiple UEs transmit D2D synchronization signals without coordinated timing rules, then synchronization coverage can be extended, but transmission timing conflicts and resource waste occur
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure and coordinate D2D synchronization signal transmission timing for multiple UEs before actual transmission occurs. The base station provides advance resource allocation information, timing offsets, and transmission schedules to participating UEs, enabling them to transmit synchronization signals at coordinated times that extend coverage area while avoiding energy-wasting conflicts and ensuring efficient resource utilization
Data Source
AI summary
The present disclosure relates to a pre-5G or 5G communication system to be provided for supporting higher data rates beyond 4G communication system such as LTE. A method of transmitting a synchronization signal for device-to-device (D2D) communication in an asynchronous network is provided. The method includes transmitting, at the first cell, a system information block (SIB) including resource allocation information of a first cell and at least one neighboring cell, determining whether a first terminal is in a first mode and whether the first terminal is scheduled to perform one of a D2D communication and a D2D discovery, determining, when the first terminal is in the first mode, whether the first terminal is required to transmit a D2D synchronization signal (D2DSS), and transmitting, when the first terminal is required to transmit the D2DSS, scheduling information including a transmission time point and transmission reference timing information to the first terminal.