IP Router Local Routing During Core Network Outage
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining communication sessions when a connection to the core network is lost, particularly due to overloading or network downtime, leading to disruptions in services like voice calls and data exchanges.
Innovation Solution
An IP router scans data packets to identify active users and generates a database, allowing it to route communication sessions that can be maintained back to the base station for delivery, even without a connection to the core network, ensuring continuity of services like voice calls and data exchanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station maintains connection to the core network for normal operation, then communication services can be routed through the core network, but when the core network is overloaded or down, the base station cannot maintain communication sessions
Solution Approach 1:
The IP router acts as an intermediary between the base station and the core network. It maintains a database of active users and intercepts data packets to perform deep packet inspection, identifying communication sessions that can be maintained locally when the core network is unavailable, thus mediating the connection and enabling service continuity without direct core network involvement
Solution Approach 2:
The system segments the communication routing into two paths: normal routing through the core network and alternative local routing when the core network is unavailable. The IP router separates the functions of core network communication and local session maintenance, allowing independent operation of each path and enabling seamless switching between them
2Reliability
If the IP router performs deep packet inspection to identify active users and maintain sessions, then service continuity is achieved during core network outages, but network resource consumption increases
Solution Approach 1:
The IP router performs preliminary actions by maintaining a database of active users and their communication sessions before the core network becomes unavailable. This pre-established information allows the router to quickly identify and maintain sessions during outages without requiring intensive real-time analysis, reducing resource consumption during the actual outage period
Solution Approach 2:
The deep packet inspection is applied selectively rather than continuously to all traffic. The IP router focuses inspection on identifying active communication sessions that need to be maintained, performing partial inspection only where necessary to preserve service continuity, rather than exhaustive inspection of all network traffic
Data Source
AI summary
A wireless communication system provides call routing when the connection to a core network is lost. A base station wirelessly exchanges data packets associated with one or more communication sessions with one or more wireless communication devices. An Internet Protocol (IP) router scans the data packets to identify active users on the base station. The IP router generates a database of the active users. The IP router detects a loss of connection to the core network and determines which of the communication sessions can be maintained based on the database of active users. The IP router routes the data packets for the communication sessions that can be maintained back to the base station for delivery.