Femtocell Base Station Dynamic Access Mode Switching
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Solution Overview
Problem
Current wireless telecommunications systems face challenges in managing the increasing demand for high-speed data services, as macrocell base stations are not suited for high-capacity data services and traditional femtocells are limited in offloading macrocell traffic due to high control signaling requirements for temporary access to unregistered users.
Innovation Solution
Femtocell base stations are selectively switched between private and public access modes based on the rate of handover requests from unregistered users, allowing unregistered users to access the network when demand exceeds a certain level, thereby increasing overall capacity and reducing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If femtocell base stations operate in private access mode only, then quality of service for registered users is maintained, but capacity to handle macrocell traffic is limited
Solution Approach 1:
The femtocell base station dynamically switches between private access mode and public access mode based on the rate of handover requests from unregistered users. When the handover request rate exceeds a threshold, the system transitions to public access mode to accommodate macrocell traffic, thereby resolving the contradiction between maintaining service quality and increasing overall capacity.
2Productivity
If femtocell base stations allow temporary access to unregistered users, then macrocell traffic offloading is enabled, but control signaling overhead increases significantly
Solution Approach 1:
The system employs dynamic mode switching between private and public access based on monitored handover request rates. This dynamic adjustment enables traffic offloading only when necessary (when handover requests exceed a threshold), avoiding the continuous control signaling overhead that would result from permanently enabling public access.
Solution Approach 2:
The invention changes the access mode parameter of the femtocell base station based on the handover request rate parameter. By monitoring this rate and switching modes accordingly, the system optimizes the balance between traffic offloading capability and control signaling complexity.
3Productivity
If macrocell base stations are deployed to meet high-speed data service demand, then coverage area is maintained, but power consumption and infrastructure cost increase
Solution Approach 1:
The invention extracts traffic handling capability from macrocell base stations by enabling femtocell base stations to operate in public access mode. This allows macrocell traffic to be offloaded to femtocells, reducing the load and power consumption of macrocell base stations while maintaining overall network capacity.
Solution Approach 2:
The system creates additional capacity by deploying low-power femtocell base stations that replicate the traffic handling function of macrocell base stations in specific local areas, thereby reducing the need for additional high-power macrocell infrastructure.
Data Source
Figure 1~2
Figure 3
AI summary
A femtocell base station is provided. The base station is switchable in use between a first mode of operation and a second mode of operation. In the first mode of operation only user terminals that are registered with the femtocell base station are connectable to the femtocell base station. In the second mode of operation a user terminal that is not registered with the femtocell base station is connectable to the femtocell base station.