LTE Access Node Virtual Interface Encapsulation for Emergency Resilience
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Solution Overview
Problem
Existing LTE networks face challenges in maintaining communication during natural disasters and emergency situations due to physical destruction of infrastructure, network congestion, and limited capacity, especially in remote areas where telecommunications infrastructure is scarce.
Innovation Solution
A communication network architecture that includes a core packet network with wireless access nodes equipped with a control entity capable of establishing virtual interfaces, encapsulating messages, and managing service interruptions, allowing for dynamic deployment and mobility of eNB nodes with multi-interface connectivity and autonomous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE networks use traditional fixed infrastructure architecture, then network stability is maintained under normal conditions, but the network cannot adapt to dynamic emergency situations and mobile deployments
Solution Approach 1:
The patent implements dynamic network architecture where eNB nodes can change their operational mode between connected and isolated states based on real-time network conditions. The control entity dynamically adjusts network topology and routing paths, allowing the network to adapt to emergency situations without requiring complete architectural redesign.
Solution Approach 2:
The control entity serves multiple functions: it manages connected mode operations, handles isolation detection, performs encapsulation/decapsulation, and maintains packet routing during disruptions. This multi-functionality allows a single component to address various network states, reducing the need for separate specialized systems.
2Area of stationary object
If eNB nodes are deployed in remote areas with limited infrastructure, then network coverage is extended to underserved regions, but the nodes become vulnerable to isolation and service interruptions
Solution Approach 1:
The control entity is pre-configured with encapsulation capabilities and packet buffering functionality before isolation events occur. When infrastructure failures happen, these pre-prepared mechanisms immediately activate to maintain service continuity, eliminating the need for reactive infrastructure deployment in remote areas.
Solution Approach 2:
The control entity acts as an intermediary between the eNB node and the core network, performing encapsulation and decapsulation of packets. This intermediary function allows packets to be forwarded even when direct infrastructure connections are disrupted, maintaining reliability without requiring redundant physical infrastructure in remote locations.
3Reliability
If the network stores packets during service interruptions to maintain continuity, then service reliability is improved, but memory resources are consumed and packet forwarding delay increases
Solution Approach 1:
The control entity implements selective packet storage based on packet type and priority. Not all packets are buffered during interruptions - only those essential for service continuity are stored, while others are discarded or handled through alternative paths. This partial action approach maintains reliability for critical services without excessive resource consumption.
Solution Approach 2:
The encapsulation mechanism enables continuous packet forwarding through the control entity even when direct infrastructure connections are interrupted. By maintaining the encapsulated packet flow, the system achieves service continuity without relying heavily on storage, reducing both memory usage and forwarding delays.
4Reliability
If multiple interfaces are implemented for multi-path connectivity, then network resilience during disruptions is improved, but device complexity and configuration difficulty increase
Solution Approach 1:
The control entity automatically detects interface availability and configures appropriate routing paths without manual intervention. When disruptions occur, the system self-adjusts by detecting isolated mode and switching to stored packet forwarding, eliminating the need for complex manual multi-interface configuration while maintaining resilience.
Solution Approach 2:
The system dynamically changes operational parameters such as interface activation states and routing modes based on detected network conditions. Rather than requiring fixed complex multi-interface configurations, the parameters adapt automatically - switching between connected and isolated modes - simplifying the overall system while maintaining resilience.
Data Source
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AI summary
The invention relates to a communication network comprising a packet network core (200) and at least one wireless access node (30) arranged so as to supply the network core with access to user equipment by means of a first interface established between the access node and a network element (110, 120) of the network core. The network comprises at least one control body (50, 51) designed to establish a second virtual interface transiting via the control body and connecting the access node and the network element, and wherein the first interface is encapsulated.