UMA Network Offload Device Bypasses Traffic Bottlenecks
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Solution Overview
Problem
Conventional Unlicensed Mobile Access (UMA) network architectures experience traffic bottlenecks at the UMA Controller (UNC) and Serving GPRS Support Node (SGSN), limiting the effective utilization of high bandwidth afforded by unlicensed spectrum for wireless clients.
Innovation Solution
The implementation of an offload device, such as a Security GateWay (SGW), which selectively offloads User-plane (U-plane) packet transfer functionality from conventional UNC or SGSN modules, thereby bypassing traffic bottlenecks and enhancing the delivery of high-speed Internet Protocol (IP) services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional UMA network architecture is used with UNC and SGSN modules, then network control and authentication functions are provided, but traffic bottlenecks occur at these modules limiting high bandwidth utilization
Solution Approach 1:
The patent segments the network functionality by separating the UMA access network from the core network. The access network (GAN controller and base stations) is separated from the core network (MSC and SGSN), allowing independent optimization of each segment. This segmentation enables the access network to handle high-bandwidth traffic while the core network maintains control functions, resolving the bottleneck issue.
Solution Approach 2:
The patent introduces an IP gateway as an intermediary device between the UMA access network and the core network. This gateway handles protocol conversion and traffic routing, acting as a mediator that prevents direct bottlenecks at the SGSN and UNC modules while maintaining network control functions.
2Speed
If traffic is routed through UNC and SGSN modules, then network control and authentication are maintained, but delivery speed of high-speed IP services is limited
Solution Approach 1:
The architecture segments control plane functions (at UNC/GAN controller) from user plane data traffic (routed through IP gateway), allowing high-speed data delivery independent of control signaling complexity.
Solution Approach 2:
The IP gateway serves as an intermediary that simplifies the path for high-speed IP services by providing direct routing between access network and core network, bypassing the complexity of traditional SGSN-UNC signaling paths while maintaining necessary network control.
3Productivity
If conventional UMA architecture is used, then authentication and authorization functions are provided through AAA server and HLR, but traffic bottlenecks inhibit effective utilization of unlicensed spectrum bandwidth
Solution Approach 1:
The patent segments authentication/authorization functions (handled by AAA server and HLR in core network) from data traffic routing (handled by IP gateway), allowing authentication to occur without creating bottlenecks in the high-bandwidth data path. This enables efficient spectrum utilization by separating control signaling from user data traffic.
Solution Approach 2:
The IP gateway acts as an intermediary that establishes efficient data paths bypassing authentication infrastructure bottlenecks, while still maintaining security by working in conjunction with the AAA server for authenticated traffic routing.
Data Source
AI summary
An Unlicensed Mobile Access (UMA) network architecture. In a specific embodiment, the network architecture includes a mobile station and an access point in communication with the mobile station. A UMA Controller (UNC) communicates with the access point. A Service GateWay (SGW) communicates with the UMA controller. The SGW includes functionality to route user-plane packets in the UMA. In a more specific embodiment, the functionality includes UNC user-plane functionality offloaded from the UNC to the SGW; Serving GPRS Support Node (SGSN) user-plane functionality; access-authentication functionality sufficient to enable the SGW to enable the SGW to bypass a legacy SGSN control plane; and/or Radio Network Controller (RNC) user-plane functionality sufficient to enable communications between the SGW and the RNC.