Base Station Coverage Modification Handover Preparation
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Solution Overview
Problem
Existing 5G communication systems face re-establishment failures and mobility robustness optimization issues during cell splitting/merging and cell shaping scenarios due to inadequate notification and preparation of handover processes between base stations.
Innovation Solution
A method and system for self-configuration and self-optimization where a base station controlling a coverage modification cell notifies a second base station of coverage modifications, enabling it to prepare for handovers, save or update modification information, and retrieve mobility robustness status, thereby preventing re-establishment failures and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a base station performs cell re-configuration in coverage modification scenarios, then the network can adapt to changing coverage requirements, but re-establishment failures occur due to lack of coordination with neighboring base stations
Solution Approach 1:
The patent applies preliminary action by notifying neighboring base stations of coverage modification intentions before the actual cell re-configuration takes place. This allows neighboring base stations to prepare their handover parameters and resources in advance, ensuring seamless handover and preventing re-establishment failures when the coverage modification occurs.
Solution Approach 2:
The patent implements feedback mechanisms where base stations exchange coverage modification information and handover status with neighboring base stations. This feedback loop enables dynamic adjustment of handover parameters and allows the system to respond to actual handover outcomes, improving reliability while maintaining adaptability.
2Reliability
If a base station maintains all cell information for potential handovers, then handover reliability improves, but system resource consumption increases due to storing unnecessary information
Solution Approach 1:
The patent applies local quality by making the information retention policy context-dependent. Base stations selectively retain cell information based on the specific coverage modification scenario and the actual handover needs of user equipment. This ensures that information is maintained only where and when necessary, balancing reliability with resource efficiency.
Solution Approach 2:
The patent changes the parameter of information retention from a static state to a dynamic state that adjusts based on network conditions and handover requirements. Information is retained or released based on real-time assessment of handover probability and actual handover events, optimizing the balance between reliability and resource consumption.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus implements a method for self-configuration and self-optimization. A method for operating a base station (BS) in a wireless communication network comprises transmitting a message including information on coverage modification indicating whether the message is for pre-notification of cell re-configuration, to another BS, and receiving an acknowledgement message from the another BS.