Sidelink Communication Latency Reporting for NR-LTE Coordination
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing sidelink (SL) communication, particularly in vehicle-to-everything (V2X) scenarios, due to limitations in latency and reliability, and existing technologies struggle to effectively manage the interaction between new radio (NR) and long-term evolution (LTE) modules for seamless communication.
Innovation Solution
A method and apparatus that enable a UE to obtain and transmit minimum latency between NR and LTE modules, allowing for the reception of downlink control information (DCI) from an NR base station, which includes a timing offset, facilitating efficient SL communication and reducing implementation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE performs both NR and LTE communication operations, then communication capability is enhanced, but implementation complexity increases
Solution Approach 1:
The patent segments the dual-radio operation into separate NR and LTE modules, each handling specific communication tasks independently. The NR module handles NR SL communication while the LTE module handles LTE SL communication, allowing parallel operation without interference and reducing overall system complexity
Solution Approach 2:
The UE is designed with multi-functionality to support both NR and LTE communication protocols simultaneously. The apparatus can perform NR SL communication, LTE SL communication, and coordinated operations between the two systems, making it universally compatible with multiple communication standards
2Reliability
If timing coordination between NR and LTE modules is implemented, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring timing relationships between NR and LTE modules. The network provides timing offset information in advance, allowing the UE to pre-synchronize its internal clocks and coordinate transmission timing before actual communication occurs, thereby ensuring reliability without complex real-time coordination
Solution Approach 2:
The network acts as an intermediary that provides timing offset information to the UE. This intermediary mechanism allows the UE to coordinate its NR and LTE modules based on network-provided timing references, simplifying the synchronization process compared to direct peer-to-peer timing coordination between modules
3Productivity
If minimum latency information is reported to the network, then scheduling efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by reporting minimum latency information specifically for NR-LTE inter-module operations only when needed. Rather than continuous reporting, the UE provides latency capabilities locally at the points where NR and LTE coordination is required, reducing overall signaling overhead while maintaining scheduling efficiency
Data Source
AI summary
An embodiment of the present disclosure provides a method for a first apparatus to receive control information. The method includes: obtaining a minimum latency between a new radio (NR) module for NR communication of the first apparatus and a long-term evolution (LTE) module for LTE communication of the first apparatus based on the NR module and the LTE module; transmitting information on the minimum latency to an NR base station; and receiving downlink control information (DCI) from the NR base station, wherein the DCI includes a first timing offset determined by the NR base station based on the minimum latency.