D2D Signal Resource Configuration for Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving Device-to-Device (D2D) signals, particularly in terms of resource configuration and synchronization, which affects the reliability and effectiveness of D2D communication, especially in scenarios with varying network coverage.
Innovation Solution
The proposed method involves efficiently configuring D2D synchronization signal (D2DSS) resources and transmission conditions, allowing D2D communication to occur within and outside network coverage by defining specific subframes and resource pools for D2D signal transmission and reception, ensuring minimal interference with cellular communications and optimizing synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If D2D signal transmission and reception use the same sub-frame structure as discovery signals, then resource configuration simplicity is improved, but interference with cellular communications increases
Solution Approach 1:
The patent divides the radio frame into distinct subframe types: discovery subframes dedicated for D2D discovery signals and communication subframes for D2D communication signals. This segmentation allows separate resource allocation and configuration for different D2D functions, simplifying overall resource management while preventing interference with cellular communications through dedicated time resources.
Solution Approach 2:
The patent implements periodic discovery subframes that occur at regular intervals within the radio frame structure. This periodic action enables D2D devices to perform discovery and communication in designated time windows, ensuring predictable resource usage and minimizing interference with cellular traffic while maintaining systematic resource configuration.
2Adaptability or versatility
If D2D communication is enabled in all network coverage scenarios, then adaptability is improved, but synchronization reliability deteriorates
Solution Approach 1:
The patent implements different resource pool configurations tailored to specific network coverage scenarios. For in-coverage devices, one configuration is used while for out-of-coverage devices, a different configuration is applied. This local quality approach ensures optimal performance and synchronization reliability for each scenario while maintaining overall system adaptability across diverse coverage conditions.
Solution Approach 2:
The patent enables dynamic adaptation of D2D resource pools based on network coverage status. Devices can transition between different resource pool configurations depending on whether they are in-coverage or out-of-coverage, allowing the system to dynamically adjust to changing network conditions while maintaining reliable synchronization through scenario-appropriate configurations.
3Object-affected harmful factors
If resource pools are configured separately for discovery and communication, then interference management is improved, but resource allocation complexity increases
Solution Approach 1:
The patent separates discovery and communication resources in the time dimension by allocating different subframes for each function. This dimensional separation effectively manages interference between discovery and communication signals while the unified resource pool structure within each dimension keeps configuration complexity manageable through systematic resource organization.
Data Source
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AI summary
The present invention relates to a method and apparatus for monitoring a downlink control channel by a first terminal having a single RX chain in a wireless communication system. Specifically, the present invention comprises the steps of: setting a particular gap for a resource area related to device-to-device (D2D) signal transmission/reception; and monitoring a wide area network (WAN) communication-based downlink control channel on the basis of a timer performed according to a discontinuous reception (DRX) operation, wherein the timer is counted on the basis of at least one subframe which does not overlap with the particular gap, and the particular gap is a time interval set for allowing the single RX chain to cover a switching operation between WMN communication and D2D communication.