Base Station Cell Selection Using Service-Specific Quality Indicators
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Solution Overview
Problem
Existing communication systems fail to ensure mobile terminals transition to the optimum cell for improving user experience, particularly in VoLTE services, due to high audio dropout rates caused by reconnection issues in areas with poor communication quality.
Innovation Solution
A communication system comprising a mobile terminal, a server, and a base station that acquires and compares communication quality indicators for the host cell and adjacent cells, determining the optimum cell based on these indicators and facilitating a seamless transition to improve service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile terminal camps on a cell with static low reconnection frequency, then user's sensible quality is improved, but the terminal may not receive applicable services with preferred quality when the cell is not optimal for the specific service
Solution Approach 1:
The system changes the cell selection parameter from static reconnection frequency to dynamic service-specific communication quality indicators. The base station retrieves communication quality indicators from the server that are specific to the applicable service (e.g., VoLTE) and uses these indicators to determine the optimal cell for the mobile terminal, rather than relying on static reconnection frequency data.
Solution Approach 2:
The system performs preliminary cell evaluation by retrieving communication quality indicators from the server before the mobile terminal actually camps on a cell. The base station proactively determines the optimal cell based on service-specific quality indicators and instructs the terminal to camp on that cell in advance, preventing service quality issues before they occur.
2Ease of operation
If the base station uses only reconnection frequency data for cell selection, then the system is simple to operate, but it cannot provide service-specific optimal cell selection
Solution Approach 1:
The system introduces a server as an intermediary that stores and provides communication quality indicators for different applicable services and cells. The base station queries this server to obtain service-specific quality data, which it then uses to make informed cell selection decisions. This intermediary provides precise service-specific measurements without complicating the base station's operation.
3Reliability
If audio dropout occurs due to reconnection in poor communication areas, then the system maintains basic connectivity, but user's sensible quality deteriorates
Solution Approach 1:
The system converts the potentially harmful reconnection process into a beneficial service-quality-driven cell selection mechanism. Instead of passively accepting reconnections that cause audio dropout, the base station actively uses communication quality indicators to pre-determine the optimal cell for service-specific quality, transforming reconnection from a source of audio dropout into a controlled transition that maintains both connectivity and service quality.
Data Source
AI summary
Included are a mobile terminal 10, a server 40 that stores a communication quality indicator for each applicable service and for each cell, and a base station 20 that acquires, from the server 40, the communication quality indicator of a host cell that is the cell of the base station 20 for an applicable service used by the mobile terminal 10 camping on the host cell and the communication quality indicator of an adjacent cell adjacent to the host cell for the applicable service, and determines whether the host cell is an optimum cell for the applicable service among the host cell and the adjacent cell based on the communication quality indicators acquired by the communication unit, and when the host cell is not the optimum cell, make the mobile terminal 10 transition to the optimum cell.