CSG Cell Selection via Priority Values
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Solution Overview
Problem
Current cellular systems face challenges in selecting the preferred Closed Subscriber Group (CSG) cell for communication due to inadequate planning of CSG cell coverage, leading to registration issues and higher billing rates when stronger radio signals from neighboring CSG cells are selected instead of the user's preferred home CSG cell.
Innovation Solution
A method is introduced that uses priority values to select a CSG cell based on its type, presence in the User CSG list or Allowed CSG list, and billing rates, ensuring the user's home or preferred CSG cell is chosen over others, even if they offer stronger radio signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell selection is based on radio signal strength, then communication reliability is improved, but billing cost increases and user preference is not respected
Solution Approach 1:
The patent changes the selection parameter from radio signal strength alone to a composite parameter that includes priority values associated with different CSG cells. This priority value system allows the mobile device to select cells based on both signal quality and predefined priorities (such as home cell vs. neighboring cells), thereby resolving the contradiction between reliable communication and cost control.
2Area of stationary object
If cell selection is based on radio signal strength, then communication coverage is improved, but registration accuracy deteriorates
Solution Approach 1:
The patent modifies the cell selection criterion by introducing priority values that differentiate between home CSG cells and neighboring CSG cells. This allows the system to maintain broad coverage by selecting from available cells while improving registration accuracy by prioritizing the correct home cell through the priority value mechanism.
3Ease of operation
If automatic cell selection is used, then ease of operation is improved, but selection precision deteriorates
Solution Approach 1:
The patent enhances automatic cell selection by incorporating priority values into the selection algorithm. The mobile device automatically selects cells based on a combination of signal strength and priority values, maintaining ease of operation while improving selection precision through the prioritization mechanism that distinguishes home cells from neighboring cells.
Data Source
AI summary
A method of selecting a private cell for providing communication to a communication device (222) in a communication system (200) comprising a plurality of private cells (202, 204, 206, 208) comprises identifying (400) private cells available to the communication device for establishing communication, determining (402) a priority value from a plurality of priority values for each of the identified private cells for the communication device, and selecting (404) a private cell for providing communication from the identified private cells according to the determined priority values of the identified private cells. Each private cell may be associated with a predetermined type of private cell for the communication device. The priority values for each of the identified private cells may then be determined according to the predetermined type associated with the identified private cell. A method of synchronising a priority value of a private cell determined by the communication device with a priority value of the private cell determined by a network (218) is also disclosed.