Terminal Device Service Switching for Link Interruption
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Solution Overview
Problem
Existing communication systems fail to guarantee reliability after communication links between network devices and terminal devices are interrupted, particularly in critical scenarios like factory automation and power grid control, as the reliability cannot be ensured by relying solely on the communication link between one terminal device and a network device.
Innovation Solution
A method of service switching between terminal devices is implemented, where a first terminal device transmits a service switching request message to a second terminal device, which then forwards a service request message to a network device, ensuring continuity of sessions or services and improving communication reliability by establishing an alternative communication link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single communication link between terminal device and network device is used, then device complexity is reduced, but reliability after link interruption deteriorates
Solution Approach 1:
The patent introduces a second terminal device as an intermediary to establish an alternative communication path. When the primary link between the first terminal device and network device is interrupted, the second terminal device acts as a mediator to forward service requests and maintain session continuity, thereby improving reliability without requiring complex multi-active-link management at the original terminal.
Solution Approach 2:
The patent adds a dimensional shift by involving another terminal device in the communication architecture. Instead of maintaining multiple links from a single terminal, the solution transitions to a multi-terminal collaborative model where the second terminal device provides backup communication capabilities, effectively adding a new dimension to the communication topology for improved reliability.
2Reliability
If service switching between terminal devices is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling terminal devices to autonomously perform service switching without extensive network intervention. The first terminal device automatically detects link failures and initiates service migration to the second terminal device based on pre-configured parameters, reducing the complexity of centralized management while maintaining session continuity.
Solution Approach 2:
The patent applies preliminary action by pre-configuring service switching parameters and establishing backup communication paths before actual failures occur. The second terminal device is pre-registered as a backup node with necessary session information, enabling rapid service migration when needed without requiring complex real-time decision-making or configuration.
3Reliability
If alternative communication path is established, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent reduces service switching time through preliminary action by pre-establishing backup communication paths and pre-configuring session parameters on the second terminal device. When a link failure occurs, the system can immediately activate the pre-prepared backup path without time-consuming configuration or negotiation processes, thus minimizing service interruption.
Solution Approach 2:
The patent implements feedback mechanisms where terminal devices continuously monitor communication link status and automatically trigger service switching when failures are detected. This real-time feedback enables rapid detection and response to link interruptions, reducing the time between failure occurrence and service restoration by eliminating manual detection and decision-making delays.
Data Source
AI summary
A method for service switching between terminal devices. The method comprises transmitting, by a first terminal device, a service switching request message to a second terminal device, wherein the service switching request message is configured to request the second terminal device to activate at least one session or service specified by the first terminal device, and comprises identifier information of the at least one session or service.