PSCCH Resource Allocation for D2D Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting Device-to-Device (D2D) communication, particularly in resource allocation for transmitting control information and determining control information transmission resources in D2D communications.
Innovation Solution
A method involving a UE that receives Physical Sidelink Control Channel (PSCCH) resource pool configuration information and Downlink Control Information (DCI) from an eNB, allowing for the determination and transmission of PSCCH time-frequency resources based on the provided resource allocation information, using specific mapping rules and offset values to efficiently manage D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource allocation information is provided through Downlink Control Information (DCI) for PSCCH transmission, then resource allocation efficiency is improved, but the complexity of resource management increases
Solution Approach 1:
The patent introduces an intermediary mapping mechanism that translates DCI resource allocation information into specific PSCCH time-frequency resources through predefined mapping rules. This intermediary layer simplifies the resource management complexity by automating the translation process rather than requiring direct complex resource allocation decisions
Solution Approach 2:
The patent utilizes parameter changes in the DCI format to dynamically indicate resource allocation information. By encoding resource allocation details in DCI parameters, the system achieves flexible resource allocation while maintaining a standardized control information structure that manages complexity
2Reliability
If multiple PSCCH time-frequency resources are determined based on resource allocation information, then control information transmission reliability is improved, but the difficulty of resource determination increases
Solution Approach 1:
The patent segments the PSCCH resource pool into multiple time-frequency resources that can be independently selected and allocated. This segmentation allows the system to determine multiple candidate resources based on DCI information, improving transmission reliability through resource diversity while managing determination complexity through structured segmentation
Solution Approach 2:
The patent establishes preliminary mapping rules that define the relationship between DCI resource allocation information and specific PSCCH time-frequency resources before actual transmission occurs. This preliminary action pre-computes and stores mapping relationships, reducing the real-time determination difficulty while enabling reliable multi-resource selection
Data Source
AI summary
Disclosed are a method for device-to-device communication in a wireless communication system, and an apparatus therefor. Specifically, the present invention relates to a method for performing device-to-device (D2D) communication by a terminal in a wireless communication system, the method comprising the steps of: receiving, from a base station, physical sidelink control channel (PSCCH) resource pool setting information; receiving, from the base station, downlink control information (DCI) including the PSCCH resource allocation information; and sending the PSCCH on the basis of the PSCCH resource allocation information, wherein a first PSCCH time-frequency resource and a second PSCCH time-frequency resource for sending the PSCCH are determined on the basis of a value indicated in the PSCCH resource allocation information within the PSCCH resource pool, and the PSCCH may be sent in the first PSCCH time-frequency resource and the second PSCCH time-frequency resource.