D2D Signal PRACH Resource Segmentation
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Solution Overview
Problem
In Device-to-Device (D2D) communication, there is a need to avoid collisions between Wide Area Network (WAN) signals and D2D signals, as D2D signal transmission can be recognized as interference from the perspective of user equipment or base stations, affecting synchronization and communication performance.
Innovation Solution
A method and apparatus for transmitting D2D signals by receiving PRACH and D2D resource information from a base station, allowing D2D signals to be transmitted on specific radio resources, either when configured to transmit PRACH or not, to prevent collisions and maintain communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D signal transmission is performed on uplink resources, then D2D communication capability is enabled, but collision with WAN signals occurs and interference is generated
Solution Approach 1:
The patent segments the radio resources by introducing separate resource pools: one for WAN signals (PRACH resources) and another for D2D signals. The base station configures distinct D2D resource pools that do not overlap with PRACH resources, thereby preventing resource collision and signal interference while enabling both communication types to coexist.
Solution Approach 2:
The base station acts as an intermediary that manages and coordinates resource allocation between WAN and D2D communications. It configures and signals D2D resource pool information to UEs, ensuring that D2D transmissions occur on resources that do not conflict with WAN signal resources, thus mediating the resource sharing to avoid interference.
2Productivity
If PRACH and D2D resources overlap, then resource utilization increases, but synchronization performance degrades
Solution Approach 1:
The patent segments the time-frequency resources by defining separate resource pools for PRACH and D2D signals. By ensuring that D2D resource pools do not overlap with PRACH resources in time and frequency domains, the patent maintains reliable synchronization for both WAN and D2D communications while still achieving efficient resource utilization through dedicated D2D resource allocation.
3Productivity
If D2D signals are transmitted on PRACH resources, then resource efficiency improves, but PRACH transmission reliability deteriorates
Solution Approach 1:
The base station serves as an intermediary that configures and manages separate D2D resource pools, preventing D2D transmissions from occurring on PRACH resources. This mediation ensures that PRACH transmission reliability is maintained while D2D communications utilize dedicated resources efficiently, avoiding resource conflicts.
Solution Approach 2:
The patent segments the available radio resources into distinct pools: PRACH resources for wide area network access and separate D2D resource pools for device-to-device communication. This segmentation ensures that PRACH transmissions maintain their reliability while D2D communications achieve efficient resource utilization through dedicated allocation.
Data Source
AI summary
Disclosed is a method for utilizing physical random access channel (PRACH) more efficiently. The method for transmitting a D2D signal according to one embodiment allows a corresponding terminal to transceive a D2D signal, for a PRACH transmission, by means of a non-configured wireless resource from among the PRACH resources.