Sidelink Resource Information Transmission via PSBCH
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing groupcast communication and obtaining information on sidelink resources in V2X communication, particularly in configuring SL resources based on TDD-UL-DL configuration information received from a base station.
Innovation Solution
A method and apparatus for transmitting and receiving information on sidelink (SL) resources, where a first apparatus receives TDD-UL-DL configuration information from a base station, obtains SL resource information, and transmits this information to a second apparatus through a physical sidelink broadcast channel (PSBCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink resource information is transmitted through dedicated signaling between apparatuses, then communication reliability is improved, but signaling overhead and complexity increase
Solution Approach 1:
The base station acts as an intermediary that centrally manages and allocates sidelink resources. Instead of direct complex signaling between apparatuses, the base station receives TDD-UL-DL configuration information from upper layers and distributes appropriate SL resource information to apparatuses through simplified downlink signaling, reducing inter-apparatus signaling complexity while maintaining reliability through centralized control
Solution Approach 2:
Apparatuses autonomously determine their sidelink resources based on pre-configured TDD-UL-DL patterns and received base station indications. Each apparatus self-configures its SL resources according to the TDD pattern information, eliminating the need for complex dedicated signaling negotiations between apparatuses while ensuring reliable resource allocation
2Productivity
If TDD-UL-DL configuration information is used to determine SL resources, then resource allocation efficiency is improved, but configuration complexity increases
Solution Approach 1:
The TDD-UL-DL configuration information serves multiple functions simultaneously: it defines uplink-downlink slot patterns for Uu interface communication, determines available sidelink resources, and provides timing reference for SL transmissions. This multi-functionality improves resource allocation efficiency by using a single configuration structure for multiple purposes while the base station manages the complexity of coordinating these functions
Solution Approach 2:
The system dynamically adjusts sidelink resource allocation by modifying parameters within the TDD-UL-DL configuration framework. The base station can change TDD patterns, slot offsets, and resource block allocations based on traffic conditions, allowing flexible resource adaptation without requiring completely new configuration structures, thus improving efficiency while managing complexity through parameter tuning
Data Source
AI summary
One embodiment of the present disclosure provides a method for transmitting, by a first device, information on an SL resource. The method comprises the steps of: receiving, from a base station, TDD-UL-DL configuration information; obtaining information on an SL resource, on the basis of the TDD-UL-DL configuration information; and transmitting, to a second device over a PSBCH, the information on the SL resource.