Long Connected Mode Handover Control in LTE-A Networks
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Solution Overview
Problem
In wireless communication systems, particularly in LTE-A, User Equipment (UE) frequently transitions between connected and idle modes for small data communication, leading to signaling overload due to repeated radio resource allocation and release, which increases network traffic and handover overload.
Innovation Solution
The network adjusts measurement configurations for UE in long connected mode by extending measurement report intervals and lowering signal strength thresholds, and transitions the UE to idle mode without data forwarding during handovers, minimizing handover signaling and context transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE frequently transitions between connected and idle modes for small data communication, then the radio resource allocation and release signaling is generated, but the network experiences signaling overload and increased traffic load
Solution Approach 1:
The network pre-configures measurement parameters and handover thresholds for small data communication scenarios before actual data transmission occurs. This allows the UE to automatically perform handovers or mode transitions based on pre-defined conditions without requiring frequent signaling exchanges for resource allocation and release, thereby reducing signaling overhead while maintaining communication efficiency
2Quantity of substance
If the UE stays in connected mode to process small data without state transitions, then the signaling overhead is reduced, but the network experiences handover overload
Solution Approach 1:
The network dynamically adjusts measurement report intervals and handover threshold parameters based on UE activity patterns and network conditions. For small data communication, extended measurement intervals and optimized thresholds are applied to reduce the frequency of handover decisions, thereby reducing handover processing load while maintaining adequate connection management
3Adaptability or versatility
If the network performs repeated S1 connection and data bearer establishment for frequent state transitions, then the UE can communicate small data, but the network traffic load increases
Solution Approach 1:
The network maintains continuous data bearers and S1 connections for UEs engaged in small data communication, avoiding repeated establishment and release cycles. By keeping the connection state active and using pre-configured resources, the system eliminates the need for repeated signaling to set up and tear down connections, thereby reducing network traffic load while maintaining communication adaptability
Data Source
AI summary
The present invention relates to a method and a device for effectively controlling a handover of a user equipment (UE) in a long connected mode. A method for controlling a handover by an eNB, according to one embodiment of the present invention, comprises the steps of: checking whether a UE is in a long connected mode; and transmitting, to the UE, channel measurement configuration information of which a channel measurement report trigger condition is alleviated compared with a normal connected mode.