D2D Synchronization Signal Resource Allocation for WAN Interference
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting synchronization signals for device-to-device (D2D) communication, particularly in managing radio resources and minimizing interference with wide area network (WAN) communications.
Innovation Solution
A method for transmitting D2D synchronization signals through a specific radio resource index other than the one used for WAN communication, utilizing a predetermined offset based on uplink-downlink configurations, and including information such as hop count and system frame number, to efficiently manage radio resources and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If D2D synchronization signals are transmitted using the same radio resource as WAN communication, then radio resource utilization is maximized, but interference with WAN communication increases
Solution Approach 1:
The patent segments radio resources by creating separate resource pools for D2D synchronization signals and WAN communication. Specifically, it designates certain physical resource blocks (PRBs) exclusively for D2D synchronization signal transmission, while other PRBs remain dedicated to WAN communication, thereby eliminating resource conflict and interference between the two functions.
Solution Approach 2:
The patent extracts D2D synchronization signal transmission from the general WAN communication resource pool and places it in a dedicated resource pool. This separation removes the harmful interaction between D2D and WAN communications by ensuring they operate in independently allocated resource spaces.
2Object-affected harmful factors
If separate radio resources are allocated for D2D synchronization signals, then interference with WAN communication is minimized, but radio resource management complexity increases
Solution Approach 1:
The patent applies local quality by configuring different resource allocation schemes in different spatial or functional contexts. For example, it may allocate resources based on local interference conditions, user equipment capabilities, or service requirements, allowing flexible adaptation without requiring complete reconfiguration of the entire radio resource management system.
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the D2D synchronization signal resources can be flexibly configured and adjusted based on network conditions, traffic patterns, and interference levels. This dynamic approach allows the system to adapt to changing conditions while maintaining manageable complexity through standardized configuration procedures.
3Reliability
If D2D synchronization signals use dedicated radio resources, then signal transmission reliability is improved, but available bandwidth for other communications decreases
Solution Approach 1:
The patent implements partial action by allocating only the minimum necessary radio resources for D2D synchronization signal transmission. Instead of dedicating excessive resources, it assigns just enough physical resource blocks to ensure reliable synchronization while leaving the majority of the spectrum available for other communications, achieving a balance between reliability and resource efficiency.
Data Source
AI summary
The present invention relates to a method and an apparatus for transmitting a device-to-device (D2D) synchronization signal of a first terminal in a wireless communication system. Specifically, the method comprises the steps of: receiving a radio resource setting for D2D communication; and transmitting a D2D synchronization signal to a second radio resource which corresponds to a specific index, other than a first radio resource, from among a plurality of radio resource setting-based D2D radio resources, wherein the first radio resource is defined to be used for wide area network (WAN) based communication.