Base Station Coverage Modification Notification for Handover Reliability
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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 resource management between base stations.
Innovation Solution
A method and apparatus for self-configuration and self-optimization where a base station controlling a coverage modification cell notifies information to a second base station, enabling it to save and retrieve mobility robustness status and prepare for handovers, thereby preventing re-establishment failures and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a base station performs cell splitting/merging or cell shaping operations during self-optimization, then network performance and resource utilization are improved, but re-establishment failures occur and mobility robustness optimization is compromised due to inadequate notification to neighboring base stations
Solution Approach 1:
The patent applies preliminary action by having the first base station notify the second base station of coverage modification information before the actual cell splitting, merging, or shaping operation is executed. This advance notification allows the second base station to prepare appropriate handover parameters and maintain mobility robustness optimization data, preventing re-establishment failures that would occur without such preparatory notification.
Solution Approach 2:
The patent implements feedback by establishing a notification mechanism where the first base station provides coverage modification information to the second base station. This feedback loop ensures that the second base station is aware of upcoming network changes and can adjust its handover parameters accordingly, maintaining reliable connectivity during self-optimization operations.
2Device complexity
If coverage modification information is not notified to neighboring base stations, then system complexity is reduced, but handover failures and loss of mobility robustness status occur
Solution Approach 1:
The patent extracts only the essential coverage modification information that needs to be communicated between base stations. Rather than transmitting complete system states or excessive detail, the notification contains specifically the coverage modification information required for the second base station to maintain mobility robustness optimization, minimizing information overhead while preventing data loss.
3Speed
If base stations do not prepare for handovers in advance during cell reconfiguration, then response time is reduced, but re-establishment failures increase
Solution Approach 1:
The patent applies preliminary action by enabling the second base station to receive coverage modification information and prepare handover parameters in advance of actual handover execution. This preparation phase allows the system to maintain fast handover response times while simultaneously ensuring re-establishment success by having appropriate parameters ready before handover is needed.
Data Source
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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.