Access Network Device Proactive Context Transfer for RRC Inactive Restoration
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Solution Overview
Problem
The next-generation mobile communications system faces a challenge in reducing the time it takes for a terminal to restore from an RRC inactive state to an RRC connected state, which is critical for meeting higher delay requirements.
Innovation Solution
A communication method where a serving access network device proactively sends the terminal's context to another access network device, allowing the terminal to quickly restore from an RRC inactive state to an RRC connected state without needing to reobtain the context, thereby reducing data transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal restores from RRC inactive state to RRC connected state by obtaining context from the original serving access network device, then the terminal can restore the connection, but the restoration time increases due to the need to request and receive context information
Solution Approach 1:
The access network device proactively sends the terminal context information to neighboring access network devices before the terminal actually needs to restore. This preliminary action stores the context in advance at multiple locations, so when restoration is needed, the terminal can immediately obtain the context without waiting for a request-response cycle, thus reducing restoration time and improving data transmission efficiency
Data Source
AI summary
A communication method, an access network device, and a terminal, the method comprising sending, by a first access network device, in a cell of the first access network device and corresponding to a radio network area of a terminal in a radio resource control (RRC) inactive state, and in response to the terminal in the RRC inactive state needing to be paged, a first paging message paging the terminal and sending, by the first access network device to a second access network device, a paging request message requesting to page the terminal, where the second access network device is an access network device other than the first access network device, and where the second access network device corresponds to the radio network area.