Cellular Node Core Network Reconnection via Intermediary Mediation
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Solution Overview
Problem
In cellular networks, temporary or permanent disconnections between cellular nodes and the core network due to malfunctions, sabotage, or disasters lead to communication disruptions, necessitating a rapid and efficient re-establishment of connections.
Innovation Solution
The method involves using connected nodes to discover and communicate available core network connectivity to disconnected nodes, establishing new S1 connections through X2AP messaging and encapsulating S1AP messages within X2AP messages, allowing re-establishment of core network connections even when traditional IP routing is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional IP routing is used for backhaul connections, then standard network communication is maintained, but connectivity is lost during disasters or malfunctions
Solution Approach 1:
The patent introduces an intermediary eNB (Evolved Node B) that acts as a mediator between disconnected eNBs and the core network. When direct IP routing fails due to disasters or malfunctions, the intermediary eNB receives and forwards signaling messages (such as S1AP messages) between the disconnected eNB and the core network, enabling alternative routing paths that bypass failed network segments while maintaining standard communication protocols.
Solution Approach 2:
The system dynamically switches between direct IP routing and intermediary eNB routing based on network conditions. When the direct path is available, standard IP routing is used; when disasters or malfunctions occur, the system adaptively redirects traffic through intermediary eNBs. This dynamic routing capability provides both reliability during failures and flexibility in normal operation.
2Reliability
If backup connection setups are implemented, then connectivity during disasters is improved, but setup time and complexity increase
Solution Approach 1:
The patent establishes preliminary signaling connections and message routing paths through intermediary eNBs before actual disconnection occurs. By pre-configuring alternative routing capabilities and maintaining signaling readiness through the intermediary eNB, the system can rapidly reestablish connectivity when disasters strike, avoiding lengthy backup setup procedures and reducing reconnection time significantly.
Data Source
AI summary
Some demonstrative embodiments include devices, systems and/or methods of establishing a connection between a cellular node and a core network. For example, a first Evolved Node B (eNB) may include a cellular transceiver to communicate with a User Equipment (UE); an X2 interface to communicate with at least one second eNB; and a controller to send to the second eNB a first message including a core network node discovery request, to receive from the second eNB a second message including a core network node identifier, and to establish an S1 connection between the first eNB and a core network using the core network node identifier.