Network Backup Apparatus IP Address Notification
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Solution Overview
Problem
Existing IP telephony systems face challenges in automatically and efficiently selecting a suitable backup apparatus during network failures, leading to potential service disruptions and inability to maintain continuous communication.
Innovation Solution
A network system and method where a service providing apparatus notifies and manages IP addresses of itself and backup apparatuses to terminals, allowing for automatic registration and selection of backup services based on communication failures and response times, ensuring minimal service disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single backup apparatus is installed to provide backup service, then the system complexity is reduced, but the service continuity cannot be guaranteed when the backup apparatus itself fails or when network conditions prevent communication with it
Solution Approach 1:
The backup service function is segmented across multiple independent backup apparatuses distributed in different LANs. Instead of relying on a single centralized backup apparatus, the system divides the backup functionality into multiple segments, each capable of providing backup service independently. This segmentation ensures that if one backup apparatus fails or becomes inaccessible, other segments remain available to maintain service continuity.
Solution Approach 2:
The system dynamically changes the parameter of backup apparatus selection based on network conditions and apparatus availability. Terminals can switch between different backup apparatuses by changing the selected backup target parameter, allowing the system to adapt to varying network conditions and maintain reliable service by selecting the most accessible backup apparatus at any given time.
2Reliability
If the terminal automatically switches to a backup apparatus upon detecting service providing apparatus failure, then the service continuity is improved, but the switching may fail if the backup apparatus is also inaccessible due to network failures
Solution Approach 1:
The system performs preliminary actions by pre-registering multiple backup apparatuses and establishing backup relationships before failures occur. Terminals are pre-configured with information about multiple potential backup apparatuses across different LANs, and backup relationships are established in advance. This preliminary preparation ensures that when a failure occurs, the terminal can immediately switch to an available backup apparatus without delay or complex decision-making during the failure event.
Solution Approach 2:
The system implements feedback mechanisms where terminals monitor the accessibility and operational status of backup apparatuses. When a terminal detects that a previously selected backup apparatus is no longer accessible, it receives feedback about the failure condition and automatically switches to an alternative backup apparatus. This feedback-driven approach ensures reliable automatic switching by continuously monitoring backup apparatus availability and adapting to changing network conditions.
3Reliability
If multiple backup apparatuses are distributed across different LANs, then the service availability is improved, but the network communication complexity and failure detection difficulty increase
Solution Approach 1:
Each backup apparatus autonomously manages its own operational status and accessibility information. Backup apparatuses self-report their availability and operational state to the system, eliminating the need for complex centralized monitoring mechanisms. This self-service approach simplifies failure detection across distributed LANs, as each apparatus independently provides information about its own status and can be independently evaluated for accessibility.
Data Source
AI summary
A network system includes a service providing apparatus; first and second backup apparatuses, each of which is configured to back up at least a part of a function of the service providing apparatus, and is connected with the service providing apparatus through a WAN; and a terminal connected with the service providing apparatus and the first and second backup apparatuses, and configured to receive a service from the service providing apparatus in a normal operation. The service providing apparatus has IP addresses of itself, the first and second backup apparatuses and the terminal, and notifies the IP addresses of the service providing apparatus and the first backup apparatus to the terminal in response to registration of the IP address of the terminal. The terminal holds the IP addresses of the service providing apparatus and the first backup apparatus, and registers the IP address of the terminal on the first backup apparatus based on the IP address of the first backup apparatus to receive a service from the first backup apparatus, when knowing a communication failure with the service providing apparatus.