Neighbor List Update via Mobile Station Log Information
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Solution Overview
Problem
In mobile communication systems, especially in environments where microminiature Base Stations (BSs) are frequently installed or uninstalled by users, existing methods for updating neighbor lists based on signal measurement are prone to errors, leading to inaccurate reflections of available BSs and potential link disconnections during handovers.
Innovation Solution
A method and apparatus for updating neighbor lists by storing log information when disconnecting from a first BS and performing a network entry process with a second BS, generating and transmitting log information to determine and correct errors in the neighbor list, ensuring accurate registration of microminiature BSs in the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If neighbor list is updated based on signal measurement, then overhead for setting neighbor list is reduced, but measurement error occurs causing inaccurate neighbor list reflection
Solution Approach 1:
The system performs preliminary actions by having the MS store log information about disconnected BSs before handover occurs. This pre-collected data is then used to update neighbor lists, preventing measurement errors from affecting handover decisions. The log information includes BS IDs and other relevant parameters that are captured in advance.
Solution Approach 2:
Log information acts as an intermediary between the MS and the serving BS for neighbor list updates. Instead of directly measuring signal strength from neighbor BSs (which causes measurement errors), the system uses the stored log information as a mediator to accurately identify available BSs without requiring real-time signal measurements.
2Adaptability or versatility
If microminiature BS is installed or uninstalled by user, then flexibility of system configuration is improved, but neighbor list cannot accurately reflect available BSs
Solution Approach 1:
The system implements feedback by having the MS report log information about disconnected BSs back to the serving BS. This feedback mechanism ensures that when microminiature BSs are installed or uninstalled by users, the serving BS receives updated information and can accordingly update its neighbor list to accurately reflect the current system configuration.
Solution Approach 2:
The system enables self-service by allowing the MS to automatically store and report log information about BS disconnections without requiring manual intervention from the service provider. This automatic reporting mechanism ensures the neighbor list is continuously updated to reflect user-installed or uninstalled microminiature BSs.
3Measurement precision
If log information is stored and transmitted, then neighbor list accuracy is improved, but communication overhead increases
Solution Approach 1:
The system extracts only the essential information needed for neighbor list updates from the log data. Instead of transmitting entire log files, the MS extracts and reports only relevant parameters such as BS IDs and connection status, reducing communication overhead while maintaining neighbor list accuracy.
Solution Approach 2:
The system applies partial action by selectively reporting log information only when neighbor list updates are necessary. The MS monitors disconnection events and reports log information selectively, avoiding unnecessary communication overhead while ensuring the neighbor list is updated with sufficient detail to maintain accuracy.
Data Source
AI summary
An apparatus and method for updating a neighbor list in a mobile communication system are provided. The system includes a Mobile Station (MS), a second Base Station (BS), and a first BS. The MS stores first log information, performs a network entry process with the second BS, and generates and transmits second log information to the second BS. The second BS allocates a bandwidth to the MS, receives the second log information, determines if neighbor list update is required using the second log information and, if the neighbor list update is required, updates a neighbor list and transmits the updated neighbor list information to the previous BS.