Neighbor Cell List Optimization via Reliability-Weighted Priority
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Solution Overview
Problem
Existing neighbor cell list updating methods face challenges in quickly improving flaws in the list, such as omission of registration, especially when reliable measurement results from mobile terminals are scarce, leading to potential communication quality issues and network load inefficiencies.
Innovation Solution
A wireless communication system with a neighbor cell list optimizing system that collects measurement information from multiple mobile terminals and base stations, evaluates reliability, calculates priorities for registering neighbor cells, and updates the list based on these priorities to ensure accurate and efficient handover destination candidates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If neighbor cell list updating relies on measurement results from mobile terminals, then handover accuracy is improved, but updating speed deteriorates when measurement results are scarce
Solution Approach 1:
The patent introduces a measurement result acquisition unit that acts as an intermediary, collecting measurement data from multiple sources including mobile terminals and base stations. This intermediary mechanism ensures sufficient data availability for accurate neighbor cell list updating without being constrained by the limited measurement capacity of mobile terminals alone, thereby resolving the contradiction between accuracy and updating speed.
Solution Approach 2:
The system performs preliminary actions by proactively collecting and storing measurement results from various sources before neighbor cell list updating is needed. The measurement result acquisition unit continuously gathers data in advance, ensuring that sufficient measurement information is available when updating is required, thus maintaining both accuracy and speed.
2Reliability
If neighbor cell list is updated frequently to improve accuracy, then communication quality is improved, but network load increases
Solution Approach 1:
The patent implements dynamic updating by determining whether to update the neighbor cell list based on changes in measurement results and handover performance. The system adapts the updating frequency to actual network conditions, performing updates only when necessary to maintain communication quality, thereby avoiding unnecessary network load while ensuring reliability.
Solution Approach 2:
The system uses feedback from handover success rates and measurement result changes to control the updating process. By monitoring whether communication quality has deteriorated or if measurement results have changed significantly, the system triggers updates only when needed, optimizing the balance between communication quality and network load.
3Quantity of substance
If measurement threshold is lowered to capture more neighbor cells, then list completeness is improved, but false detections increase
Solution Approach 1:
The patent merges measurement results from multiple sources including mobile terminals and base stations, and combines multiple evaluation criteria (signal strength, handover success rate, measurement consistency) to determine neighbor cell registration. This comprehensive approach ensures that cells are added to the list based on multiple confirming factors, improving completeness while filtering out false detections through cross-validation.
Solution Approach 2:
The system dynamically adjusts the evaluation parameters for neighbor cell detection based on the number of measurement results available and their consistency. When multiple reliable measurements confirm a cell's presence, the system is more willing to register it, thus improving list completeness while maintaining detection accuracy through adaptive parameter adjustment.
Data Source
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AI summary
A first mobile terminal group has a first measurement information transmitting means which measures radio quality of a second cell, and transmits measurement information to a first base station, a second mobile terminal group has a second measurement information transmitting means which measures radio quality of a first cell, and transmits measurement information to a second base station, and a neighbor cell list optimizing system has: a measurement information collecting means which collects the measurement information of the first and second cells; a reliability evaluating means which performs processing of evaluating reliability of the measurement information of the second cell; a priority calculating means which, when the reliability is a predetermined threshold or less, calculates a priority for registering the second cell in the neighbor cell list of the first cell based on the measurement information of the first cell; and a neighbor cell list updating means which performs control of determining a neighbor cell to be registered based on the priority, and updating the neighbor cell list.