Base Station Handover Control for Dual Connectivity Release
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Solution Overview
Problem
In Dual Connectivity systems, handovers between base stations can lead to power wastage and resource configuration inconsistencies when the target base station does not support Dual Connectivity, resulting in disrupted data services due to the inability to manage DC configurations.
Innovation Solution
A handover control method where the source base station determines if the target base station supports Dual Connectivity and generates DC information to release the DC configuration, transmitting this information to the user equipment to disable the DC function, ensuring seamless handovers and maintaining data services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment continues to monitor the secondary base station after handover to a target base station that does not support DC function, then the DC configuration is maintained, but power is wasted and resource configuration becomes inconsistent
Solution Approach 1:
The source base station performs preliminary action by determining whether the target base station supports DC function before completing the handover, and proactively releases the DC configuration through the handover command. This prevents the user equipment from entering a state where it would continuously monitor a secondary base station that cannot be connected, thereby avoiding unnecessary power consumption while maintaining configuration consistency.
2Productivity
If the target base station does not support DC function, then handover can be executed, but the secondary base station cannot communicate with the user equipment causing service disruption
Solution Approach 1:
The source base station determines the DC support capability of the target base station before executing handover. When the target does not support DC, the source base station proactively releases the DC configuration in the handover command, ensuring that the user equipment does not attempt to maintain connections with secondary base stations that cannot be established, thus preventing service disruption.
Solution Approach 2:
The source base station applies preliminary anti-action by preemptively releasing the DC configuration before the user equipment would attempt to use it with an incompatible target base station. This counteracts the potential harmful effect of configuration inconsistency and service disruption by eliminating the DC configuration in advance.
3Loss of energy
If the source base station releases DC configuration proactively, then power waste and configuration inconsistency are prevented, but additional signaling is required
Solution Approach 1:
The source base station merges the DC configuration release operation with the existing handover command signaling. By incorporating the DC release indication into the handover command that is already being sent to the user equipment, the patent avoids generating separate additional signaling messages, thereby reducing overall signaling overhead while still achieving proactive DC configuration release.
Data Source
AI summary
A base station and a handover control method thereof are provided. The base station supports dual connectivity (DC) technology. The method includes the following steps. A handover request is transmitted, and a handover request response corresponding to the handover request is received. Whether the handover request response includes DC information is determined. In response to the handover request response not including the DC information, the DC information related to releasing a DC configuration is generated, and a handover command including the DC information is transmitted. The handover command corresponds to the handover request response. Accordingly, user equipment can be informed to release the DC configuration, so as to reduce power. In addition, a proper resource configuration would be provided.