NR Base Station DCI for LTE Sidelink Timing Offset
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting Vehicle-to-Everything (V2X) communication scenarios, particularly in providing low latency and high reliability for safety-critical messages like Basic Safety Messages (BSM) and Cooperative Awareness Messages (CAM), due to limitations in existing radio access technologies.
Innovation Solution
The implementation of a method and apparatus for sidelink communication in a New Radio (NR) system, which includes configuring a UE to perform LTE sidelink communication based on DCI received from an NR base station, utilizing timing offsets to synchronize LTE and NR modules for efficient resource allocation and scheduling, enabling efficient transmission of sidelink control information and data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE sidelink communication is implemented without integration to NR system, then LTE SL communication can operate independently, but latency cannot be reduced below LTE module limitations and resource allocation efficiency is reduced
Solution Approach 1:
The patent combines NR base station control with LTE sidelink communication by having the NR base station send DCI to the NR module, which then forwards scheduling information to the LTE module. This integrated approach allows the system to leverage NR's lower latency capabilities while maintaining LTE's sidelink communication functionality, thereby reducing overall communication latency while preserving reliability.
Solution Approach 2:
The NR module acts as an intermediary between the NR base station and the LTE module. It receives DCI from the NR base station, processes the scheduling information, and forwards it to the LTE module for sidelink communication. This intermediary mechanism enables coordinated resource allocation across different radio access technologies, optimizing both latency and reliability.
2Adaptability or versatility
If separate LTE and NR modules are used for sidelink communication, then technology independence is maintained, but resource allocation efficiency and scheduling coordination are reduced
Solution Approach 1:
The NR module is designed with multi-functionality, serving both NR communication and LTE sidelink communication tasks. It can receive DCI from the NR base station for NR operations and simultaneously process and forward scheduling information for LTE sidelink operations. This universal design maintains technology independence while improving resource allocation efficiency through centralized control.
3Ease of operation
If timing offset configuration is not optimized, then module operation is simpler, but synchronization accuracy and communication performance are reduced
Solution Approach 1:
The system dynamically configures timing offset parameters between the NR and LTE modules based on specific communication scenarios and requirements. By adjusting these timing parameters, the system achieves precise synchronization between modules while maintaining relatively simple operational procedures. The timing offset configuration allows flexible adaptation to different latency requirements without complicating the overall module operation.
Data Source
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AI summary
An embodiment of the present disclosure provides a method by which a first device performs a Long-Term Evolution (LTE) Sidelink (SL) communication through Downlink Control Information (DCI). The method is characterized by including: a step for receiving the DCI from an NR base station through a Physical Downlink Control Channel (PDCCH); a step for acquiring a first timing offset on the basis of the DCI; and a step for performing an LTE SL communication on the basis of the first timing offset.