Base Station Handover With Service-Type Compatibility Checking
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Solution Overview
Problem
In a network slicing architecture, existing handover methods fail to ensure seamless mobility of terminal devices due to target base stations not supporting all service types, leading to service interruptions and inefficient resource utilization.
Innovation Solution
A handover method that includes a source base station determining the service types supported by a target base station and sending a handover request only if the target supports at least one service type, with inter-cell interference coordination for unsupported services, reducing signaling and minimizing service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the source base station sends a handover request to a target base station without checking service type compatibility, then the handover process is simplified and faster, but service interruptions occur when the target base station cannot support the terminal's required services
Solution Approach 1:
The source base station performs preliminary checking of service type compatibility before initiating the handover request. The handover request message includes information about the service types supported by the target base station, allowing the target base station to pre-evaluate whether it can support the terminal's required services before the handover is executed, thus preventing service interruptions.
Solution Approach 2:
The target base station provides feedback about its service type support capabilities in response to the handover request. This feedback mechanism allows the source base station to make informed decisions about whether to proceed with the handover, ensuring service continuity while managing signaling complexity through structured information exchange.
2Productivity
If the target base station supports all service types of the terminal device, then seamless handover is achieved, but resource utilization becomes inefficient when base stations have specialized service capabilities
Solution Approach 1:
The handover process is segmented into multiple evaluation stages: service type compatibility checking, support capability verification, and conditional handover execution. This segmentation allows the system to match terminal devices with base stations that have specialized service capabilities, improving resource utilization efficiency while maintaining handover success rates through structured compatibility verification.
Solution Approach 2:
The handover decision is based on dynamic parameter comparison between terminal device service requirements and base station support capabilities. By changing the evaluation parameters from simple connectivity checks to comprehensive service type matching, the system achieves both efficient resource utilization and reliable handover execution.
3Reliability
If the source base station checks service type support before handover, then service interruptions are reduced, but additional signaling overhead is introduced
Solution Approach 1:
The handover request message serves multiple functions simultaneously: it initiates the handover process, conveys service type information, and requests support capability verification. This multi-functionality reduces signaling overhead by consolidating multiple information exchanges into a single standardized message structure, while still achieving reliable service continuity verification.
Data Source
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AI summary
The present patent application discloses a handover method, a base station, and a terminal device. The handover method includes: sending, by a source base station, a handover request to a target base station, where the handover request includes information about a first service of a terminal device; receiving, by the source base station, a handover response sent by the target base station, where if the first service is supported by the target base station, the handover response includes information about a handover instruction for the first service, and the handover instruction is used to instruct the terminal device to hand over the first service from the source base station to the target base station; and sending, by the source base station, a handover response to the terminal device. In the present patent application, a handover request contains service information. The target base station can accurately perform admission control, allow admission of a supported service, and perform interference coordination for an unsupported service, so that service interruption of a terminal is reduced.