SDN Virtual Switch Routing for LTE Network Bottlenecks
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Solution Overview
Problem
Current wireless networks face challenges in scalability, flexibility, and efficiency due to hard-coded policies in LTE networks, centralized architectures, and inefficient packet routing, which become bottlenecks as data volume and device numbers increase, leading to performance limitations and bottlenecks.
Innovation Solution
Implementing a software-defined network (SDN) with an OpenFlow protocol to centralize radio resource control and routing decisions, allowing for dynamic and direct routing, decoupling control and data planes, and eliminating the need for centralized tunnel aggregation points, thereby enabling customizable mobility management and core network routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized architecture with hard-coded policies is used in LTE networks, then network stability and reliability are maintained, but network flexibility and adaptability deteriorate
Solution Approach 1:
The patent applies dynamics by replacing hard-coded static policies with software-defined, dynamically configurable policies. The RRC module can be remotely programmed with new routing policies without hardware changes, allowing the network to adapt to changing conditions while maintaining operational stability through controlled updates.
Solution Approach 2:
The invention changes the parameter of policy configuration from fixed hardware-coded values to software-configurable parameters. This allows operators to modify routing decisions, resource allocation, and network behavior through software updates, transforming the network from static to dynamically adjustable without compromising reliability.
2Reliability
If centralized data center architecture is used for user session management, then network control and security are improved, but network scalability deteriorates
Solution Approach 1:
The patent segments the centralized user session management function into distributed components. Instead of all session management occurring at a central data center, the RRC module and routing decisions are distributed across multiple network nodes and controllers, enabling scalable handling of user sessions while maintaining centralized control through software coordination.
Solution Approach 2:
The invention introduces software-defined controllers and virtual switches as intermediaries between centralized management and distributed network elements. These intermediaries enable scalable session management by distributing control functions while maintaining security through coordinated software-based policy enforcement across the network.
3Device complexity
If traditional core network architecture with PDN gateway is used, then network simplicity is maintained, but routing efficiency and performance deteriorate
Solution Approach 1:
The patent replaces the traditional mechanical/tunnel-based core network architecture with a software-defined routing system. Instead of relying on fixed tunneling through PDN gateways, the system uses software-based flow tables and virtual switches to dynamically route traffic, improving efficiency while maintaining conceptual simplicity through abstraction.
Solution Approach 2:
The invention implements multi-functional virtual switches and RRC modules that can perform multiple routing functions previously requiring separate dedicated components. These universal software components handle diverse traffic types and routing scenarios, improving efficiency without increasing physical network complexity.
4Ease of manufacture
If hard-coded routing policies are used in LTE networks, then implementation simplicity is maintained, but ease of operation and configuration deteriorate
Solution Approach 1:
The patent uses software copying and virtualization to replicate routing policies across multiple network elements. Instead of manually configuring each node, operators can define policies once and have them copied and enforced across the network through software distribution, maintaining implementation simplicity while dramatically improving configuration ease.
Solution Approach 2:
The invention enables self-service policy deployment where the software-defined network can automatically propagate and apply routing policies to appropriate network elements. The system can autonomously configure itself based on high-level operator directives, eliminating complex manual configuration while maintaining faithful implementation of intended policies.
Data Source
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AI summary
An embodiment method of routing network traffic includes configuring flow tables of a virtual switch using an OpenFlow protocol. The virtual switch is disposed at a network radio node. The method includes receiving network traffic destined for a user equipment (UE) at the virtual switch and establishing, by a packet data convergence protocol (PDCP) layer, a data radio bearer (DRB) for the network traffic between a virtual port on the virtual switch and the UE. The method also includes routing the network traffic over the DRB from the virtual port, through the PDCP layer, and toward the UE according to the flow tables.