Access Network Bearer Continuity During Control Plane Interruption
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Solution Overview
Problem
In LTE networks, control plane interruptions lead to immediate release of resources, causing user service interruptions and affecting user experience.
Innovation Solution
The access network device establishes a bearer using information from the core network and continues to transmit user plane data using this established bearer even when the control plane signal is interrupted, preventing immediate disconnection of user plane connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access network device immediately releases control plane resources and user plane resources when a control plane connection is interrupted, then the system可以快速响应 control plane failures, but user services are interrupted and user experience deteriorates
Solution Approach 1:
The patent segments the connection into control plane connection and user plane connection, allowing them to be independently managed. When the control plane connection is interrupted, only control plane resources are released while user plane resources are maintained, enabling differentiated handling of control and data functions
Solution Approach 2:
The patent introduces dynamic resource management where the access network device monitors control plane connection status and dynamically adjusts resource allocation. Based on connection status, the system transitions between maintaining full resources, maintaining only user plane resources, or releasing all resources, optimizing both reliability and service continuity
2Productivity
If the access network device maintains user plane resources during control plane interruption, then user service continuity is improved, but system resource waste increases
Solution Approach 1:
The system dynamically adjusts resource maintenance based on interruption duration and service status. User plane resources are maintained only during brief interruptions when services are active, and released when interruptions persist or services are inactive, optimizing the balance between service continuity and resource efficiency
Solution Approach 2:
The patent changes the state parameter of user plane resources from static (always released or always maintained) to dynamic (conditionally maintained). Resources are maintained only when specific conditions are met: control plane interruption detected, user services are active, and interruption duration is within threshold, reducing unnecessary resource waste
Data Source
AI summary
A data transmission method, an access network device, and a communications system are provided. The access network device obtains, from a first core network (CN) element through a control plane interface, information about a bearer that needs to be established, establishes the bearer according to the information about the bearer, and notifies, through the first CN element, the established bearer to a second CN element for use. When a signal of the control plane interface is interrupted, the access network device transmits to-be-transmitted data in an existing service of UE by using the established bearer.