Wireless Terminal Scheduling Mode Selection During Handover
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficiently handling scheduling modes during handovers and performing early data transmission in IoT environments, where seamless service provision and resource allocation are critical for maintaining connectivity and data exchange among devices.
Innovation Solution
A method and apparatus for a terminal in a wireless communication system that receives a handover command with mode information, determines the appropriate scheduling mode for sidelink logical channels based on the command, and transmits data accordingly, utilizing configured grants and exceptional resource pools to ensure uninterrupted data transmission during handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal performs handover in a wireless communication system, then connectivity is maintained between source node and target node, but data transmission interruption may occur during the handover process
Solution Approach 1:
The terminal performs early data transmission before the handover is complete. The terminal transmits data to the target node in advance using resources allocated by the source node, so that data transmission continues without interruption during the handover process. This preliminary action ensures that data is already in transit to the target node before the handover finishes, eliminating transmission gaps.
Solution Approach 2:
The system enables continuous data transmission during handover by allowing the terminal to transmit data to both source and target nodes simultaneously. The terminal receives configuration information from the source node that enables early data transmission, ensuring that the useful action of data transmission continues uninterrupted while the handover process occurs in the background.
2Loss of time
If the terminal uses early data transmission during handover, then data transmission continuity is improved, but resource allocation complexity increases
Solution Approach 1:
The source node acts as an intermediary that provides configuration information to the terminal for early data transmission. The source node allocates resources and provides guidance information that simplifies the terminal's resource allocation task during handover, reducing the complexity by having the source node manage the resource allocation process rather than requiring the terminal to independently determine resources.
3Productivity
If the terminal transmits data to the target node before handover completion, then service provision efficiency is improved, but scheduling control difficulty increases
Solution Approach 1:
The terminal receives configuration information from the source node that provides feedback guidance for early data transmission. This configuration information includes resource allocation details and transmission parameters that enable the terminal to efficiently transmit data to the target node before handover completion. The feedback mechanism ensures that the terminal has the necessary information to perform scheduled transmissions without increasing control difficulty.
Data Source
AI summary
A method and apparatus in a wireless communication system are provided. The method performed by a terminal may include: receiving, from a source node, a handover command comprising mode information associated with one or more scheduling modes in a target node; based on the handover command, determining, among the one or more scheduling modes, a scheduling mode associated with one or more sidelink logical channels (SL LCHs); and transmitting, to the target node, data from the one or more SL LCHs, based on the determined scheduling mode.