UMA Network Controller for Seamless UMTS Handoffs
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Solution Overview
Problem
Current telecommunications systems face challenges in providing seamless mobility and high-quality wireless services, as licensed wireless systems offer low quality at high costs while unlicensed systems provide high quality but with limited range and mobility.
Innovation Solution
The integration of Unlicensed Mobile Access (UMA) or General Access Network (GAN) with a Universal Mobile Telecommunications System (UMTS) core network using a UMA network controller (UNC) to facilitate dual-mode operation, enabling access via unlicensed services within range and licensed services outside, with protocol layer schemes supporting signaling and data messaging in both packet-switched and circuit-switched domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unlicensed wireless systems are used, then service quality and data transfer rates are improved, but service range is limited to 100 meters or less
Solution Approach 1:
The patent combines unlicensed wireless systems (WiFi/Bluetooth) with licensed wireless systems (cellular networks) into a unified access network. The UMA/GAN system allows mobile devices to seamlessly switch between unlicensed and licensed networks, merging their coverage areas and capabilities to provide both high quality service and extended range.
Solution Approach 2:
The UMA network controller provides multi-functionality by supporting both unlicensed and licensed network access through a single system. It enables devices to access services via unlicensed networks when in range and automatically transitions to licensed networks when out of range, making the system universally applicable across different network types.
2Length of moving object
If licensed wireless systems are used, then service range and mobility are improved, but service quality and data transfer rates deteriorate
Solution Approach 1:
The system applies local quality by allowing devices to use high-quality unlicensed networks when located within 100 meters of an access point, and automatically switch to licensed networks when moving beyond that range. This ensures optimal service quality is maintained locally while extending overall service range.
Solution Approach 2:
The UMA/GAN system dynamically switches between unlicensed and licensed network modes based on the device's location and network availability. The mobile device can transition between modes in real-time, optimizing service quality based on current conditions while maintaining continuous connectivity.
3Loss of energy
If unlicensed wireless systems are used, then cost is reduced, but mobility and service range are limited
Solution Approach 1:
The patent segments the network access into two distinct modes: unlicensed network access for cost-effective service within range, and licensed network access for extended mobility and range. This segmentation allows users to benefit from low-cost unlicensed networks when available while maintaining the option to use licensed networks for broader mobility needs.
Data Source
AI summary
Mechanisms to extend UMA (Unlicensed Mobile Access) or GAN (General Access Network) to inter-work with a UMTS (Universal Mobile Telecommunications System) core network. A UMA network controller (UNC) is provided to interface between a UMA network and a UMTS core network using the standard Iu-CS and Iu-PS interfaces. From the viewpoint of the UMTS core network, the UNC appears as another Radio Network Controller (RNC). Protocol layer schemes are disclosed for mobile stations, UNCs, SGSNs and MSCs to support signaling and data messaging in both the packet-switched and connection-switched domains. The mobile stations provide dual-mode operation, such that they are able to access the UMTS core network via unlicensed service when in a UMA access area, and to access the UMTS core network via licensed service when outside of a UMA access area and in a UTRAN service area.