Conditional Handover Resource Allocation in 5G Base Stations
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resources during conditional handover processes in 5G networks, particularly in ensuring seamless service provision and optimal resource allocation between base stations.
Innovation Solution
The method involves a first base station transmitting a handover request message with conditional handover information to a second base station, and both stations exchanging acknowledge messages with identifier information for associated cells, enabling effective resource allocation and handover execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conditional handover information is exchanged between base stations, then handover reliability is improved, but message complexity increases
Solution Approach 1:
The handover information is segmented into multiple distinct fields including conditional handover identifier, conditional handover condition, target cell information, and resource allocation information. This segmentation allows each component to be processed independently, improving reliability while managing message complexity through structured organization.
Solution Approach 2:
The source base station prepares and transmits conditional handover information to the target base station in advance, before the actual handover execution. This preliminary action includes configuring handover conditions, target cell parameters, and resource allocations beforehand, ensuring that when handover is triggered, the target base station is already prepared to immediately execute the handover, thereby improving reliability.
2Reliability
If resource allocation information is included in handover messages, then service continuity is improved, but information transmission overhead increases
Solution Approach 1:
Resource allocation information including uplink grants, downlink assignments, and physical resource blocks is pre-configured and included in the conditional handover information exchanged between base stations. This preliminary resource preparation ensures that when handover executes, the terminal can immediately access allocated resources without additional signaling, maintaining service continuity while minimizing real-time information overhead.
Solution Approach 2:
The handover message includes copied or referenced resource allocation information from existing configurations rather than transmitting complete resource descriptions. This allows the target base station to inherit resource allocations from the source base station's configuration, reducing information transmission overhead while ensuring service continuity through consistent resource assignment.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 4th-Generation (4G) communication system or a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method by a first base station in a wireless communication system, the method including transmitting, to a second base station, a handover (HO) request message including conditional handover (CHO) information; and receiving, from the second base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.