Terminal Device Connection Reestablishment for CHO-Based Cells
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, the existing connection reestablishment procedures are unclear for terminal devices when dealing with conditional handover (CHO)-based cells, leading to frequent handover failures and difficulties in high-speed mobile scenarios.
Innovation Solution
A method and terminal device configuration that determines whether to perform connection reestablishment based on the presence of a CHO-based candidate cell, allowing for specific procedures such as prohibiting certain initialization steps when a CHO-based candidate cell is configured, enabling CHO-based cell access and RRC reconfiguration complete message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs the conventional connection reestablishment procedure when a CHO-based candidate cell is selected, then the procedure follows the standard protocol, but handover failures occur frequently and the procedure is inefficient
Solution Approach 1:
The patent applies dynamics by making the connection reestablishment procedure adaptive based on the cell type. The terminal device dynamically adjusts its behavior: when a CHO-based candidate cell is selected, it skips the conventional reestablishment procedure and directly performs cell access; when a non-CHO cell is selected, it follows the standard procedure. This dynamic adjustment resolves the contradiction by optimizing both reliability and efficiency according to the specific cell type.
Solution Approach 2:
The patent changes the procedural parameters of the connection reestablishment based on the cell configuration. Specifically, it modifies the execution flow by conditionally skipping certain steps (like sending RRC connection reestablishment request) when dealing with CHO-based cells. This parameter change enables the system to achieve higher reliability and efficiency by adapting the procedure to the CHO cell characteristics.
2Ease of operation
If the terminal device follows the standard connection reestablishment procedure, then the protocol is uniformly applied, but unnecessary steps are performed when a CHO-based candidate cell is present
Solution Approach 1:
The patent extracts and removes unnecessary steps from the conventional connection reestablishment procedure when a CHO-based candidate cell is selected. Specifically, it eliminates the step of sending an RRC connection reestablishment request message, which is unnecessary for CHO cells. This extraction of redundant operations simplifies the procedure and reduces time loss while maintaining ease of operation through clear conditional logic.
Solution Approach 2:
The patent applies skipping by allowing the terminal device to bypass certain standard procedure steps when dealing with CHO-based cells. Instead of following the complete conventional reestablishment sequence, the device skips directly to cell access procedures when a CHO candidate is selected. This skipping mechanism reduces time loss and maintains operational simplicity by providing a streamlined path for CHO cell reestablishment.
Data Source
AI summary
A method of connection reestablishment, a terminal device, and a non-transitory computer-readable storage medium is provided. The method includes: in a connection reestablishment procedure, determining, by a terminal device, whether to perform the connection reestablishment procedure according to whether the terminal device is configured with a conditional handover (CHO)-based candidate cell.