Virtualized Gateway for Small Cell RAN Coordination
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Solution Overview
Problem
Current small cell radio access networks face challenges in scalability, cost-effectiveness, and latency due to the limitations of centralized access controllers, particularly in deployments with a large number of radio nodes, where the cost of dedicated hardware is not justified for fewer nodes and scaling becomes an issue for thousands of nodes.
Innovation Solution
A cloud-based gateway architecture that virtualizes network functions, allowing for the coordination of multiple small cell radio access networks, employs content caching to reduce backhaul load, uses compression techniques to minimize traffic redundancy, and implements hierarchical data mining for anomaly detection, enabling flexible deployment and efficient management across various scales.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized access controller with dedicated hardware is deployed, then frequency synchronization and airlink performance are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent uses virtualization to create virtual copies of network functions (EPC, RNC, Node B) that run on generic hardware platforms. This allows the system to replicate the functionality of dedicated hardware controllers without requiring physical dedicated hardware for each function, thereby reducing device complexity while maintaining synchronization capabilities through software-based implementations.
Solution Approach 2:
The gateway is designed as a universal platform that can perform multiple functions including EPC functions, RNC functions, and Node B functions simultaneously on generic hardware. This multi-functionality eliminates the need for separate dedicated hardware controllers for each network function, reducing overall device complexity while maintaining the reliability of frequency synchronization through integrated software control.
2Ease of operation
If a centralized access controller is deployed for many radio nodes, then coordination capability is improved, but scalability deteriorates when deploying thousands of nodes
Solution Approach 1:
The patent segments the centralized controller functions into distributed virtualized network functions that can be independently deployed and scaled. Instead of a single centralized controller managing all radio nodes, the system divides control functions across multiple virtual instances that can be distributed throughout the network, enabling scalable coordination of thousands of nodes through modular architecture.
Solution Approach 2:
The patent transitions from a traditional single-dimensional centralized control architecture to a multi-dimensional virtualized architecture where control functions can be distributed across multiple dimensions (physical locations, hardware platforms, time). This allows the system to maintain coordination capability while scaling to thousands of nodes by adding control capacity in additional dimensions rather than overloading a single centralized point.
3Loss of time
If content caching is implemented at the gateway, then latency is reduced and backhaul load is decreased, but device complexity increases
Solution Approach 1:
The patent merges the caching function with the existing gateway infrastructure that already runs virtualized network functions. By integrating content caching capabilities into the same platform that hosts EPC and RNC functions, the system reduces latency and backhaul load without adding separate dedicated caching hardware, thereby minimizing the increase in device complexity through resource consolidation.
Data Source
AI summary
A method of coordinating a plurality of radio access networks (RANs) includes aggregating, with a gateway, communications interfaces between a plurality of RANs and a packet core network through the gateway. A plurality of radio nodes (RNs) in each of the RANs is communicatively coupled to the gateway and to user equipment (UE) devices associated with the RNs in each of the RANs. The gateway also controls and coordinates mobility of the UE devices within and among the RANs.