Terminal Device Link Recovery via Cause Value Feedback
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Solution Overview
Problem
The communication link between terminal devices and network devices frequently fails, making it difficult for terminal devices to receive data and send feedback in a timely manner, and it is challenging to quickly identify and recover from these failures.
Innovation Solution
A communication method where the terminal device sends a user plane resource establishment request message to the network device, receives a feedback message with a cause value indicating the failure, and performs specific operations based on the cause value to quickly recover the communication link, such as updating route configurations, re-sending requests, or switching between communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device uses conventional communication link establishment methods, then the communication link can be established, but the link recovery time is long when failures occur
Solution Approach 1:
The terminal device performs preliminary actions by proactively detecting communication link failures and obtaining cause values from the network device before complete link collapse occurs. This early detection enables the terminal to prepare recovery operations in advance, reducing the overall recovery time when failures happen.
Solution Approach 2:
The network device provides feedback in the form of cause values that indicate the specific reasons for communication link failures. The terminal device uses this feedback information to determine appropriate recovery operations, enabling targeted and efficient link recovery rather than attempting generic recovery procedures.
2Reliability
If the terminal device attempts multiple recovery operations, then the communication link may be recovered, but the complexity of the recovery process increases
Solution Approach 1:
The cause value received from the network device serves as feedback that guides the terminal device in selecting the appropriate recovery operation. This feedback mechanism simplifies the decision-making process by providing clear information about the failure reason, enabling the terminal to choose the most suitable recovery strategy without needing to implement complex trial-and-error procedures.
Solution Approach 2:
Different recovery operations are applied based on the specific cause of failure identified through the cause value. Instead of using a single universal recovery method, the terminal device applies localized, cause-specific recovery operations, which improves recovery effectiveness while maintaining process simplicity through targeted solutions.
Data Source
AI summary
A communication method includes a terminal device that sends a user plane resource establishment request message to a network device, and receives a feedback message from the network device for the user plane resource establishment request message, where the feedback message includes a cause value of a user plane resource establishment failure. The terminal device performs, based on the cause value, an operation corresponding to the cause value. Different cause values may correspond to different operations. In this way, a communication link between the terminal device and the network device is established. In addition, in a scenario with a poor communication condition, the terminal device may deregister from a currently registered network, and register with another network.