RAT and Core Network Signaling for Disruption-Resilient Communication
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Solution Overview
Problem
Existing communication systems experience service interruptions when a public land mobile network is disrupted by natural disasters, as existing handover mechanisms fail to smoothly transition terminal devices to alternative networks like NG-RAN, E-UTRAN, or UTRAN.
Innovation Solution
A communication method and apparatus that enables terminal devices to receive information about suitable radio access technologies (RAT) and core networks (CN) types, allowing them to select an appropriate network for service continuity during network disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing handover mechanisms are used for network disruption, then network switching is attempted, but service interruption occurs due to inability to smoothly transition to alternative networks
Solution Approach 1:
The terminal device receives and stores RAT type and CN type information from the core network element in advance (before network disruption occurs). This preliminary acquisition of network capability information enables the terminal to quickly determine suitable alternative networks when disruption occurs, avoiding service interruption without requiring complex real-time handover procedures.
2Reliability
If pre-configured network handover is implemented, then basic services can be obtained, but service continuity is not ensured due to existing mechanism limitations
Solution Approach 1:
The terminal device autonomously determines suitable alternative networks by comparing the received RAT type and CN type information with its own capabilities and current network status. This self-service approach eliminates the need for complex network-controlled handover procedures, allowing the terminal to independently switch networks and maintain service continuity without intricate handover mechanisms.
3Productivity
If network switching is attempted during disruption, then alternative network access is sought, but service interruption occurs due to lack of smooth transition capability
Solution Approach 1:
The terminal device receives and stores RAT type and CN type information from the core network element in advance (before network disruption occurs). This preliminary acquisition of network capability information enables the terminal to quickly determine suitable alternative networks when disruption occurs, avoiding service interruption without requiring complex real-time handover procedures.
Solution Approach 2:
The terminal device autonomously determines suitable alternative networks by comparing the received RAT type and CN type information with its own capabilities and current network status. This self-service approach eliminates the need for complex network-controlled handover procedures, allowing the terminal to independently switch networks and maintain service continuity without intricate handover mechanisms.
Data Source
AI summary
A communication method and a communication apparatus are provided. The method includes the following. A terminal device receives first information from a first core network element, where the first information indicates at least one radio access technology (RAT) type and/or at least one core network (CN) type.