CBRS Small Cell Backhaul SDN Control Latency
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Solution Overview
Problem
Current small cell backhaul networks face challenges in reducing latency and optimizing resource utilization due to proprietary hardware dependencies and manual configuration in software-defined networking (SDN) and network function virtualization (NFV) systems, leading to high operational expenses and complex network management.
Innovation Solution
The implementation of a system using dedicated PAL band for control plane and GAA band, as well as parts of PAL band for data plane on a CBRS network, enables efficient communication links through SDN-based channel estimation and multiplexing between LOS mmWaves, NLOS sub-6 GHz, and FSO signals, leveraging OpenFlow messages and OpenDaylight controller for adaptive power management and latency reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If proprietary hardware dependencies and manual configuration are used in SDN and NFV systems, then device compatibility and flexibility are improved, but operational expenses and network management complexity increase
Solution Approach 1:
The system implements automated configuration and management of SDN and NFV components through self-service mechanisms. The white-box hardware platforms include built-in intelligence that enables automatic resource allocation, fault detection, and optimization without requiring manual intervention, thereby reducing operational complexity while maintaining flexibility
Solution Approach 2:
The patent employs universal white-box hardware platforms that can perform multiple functions across different network scenarios. These standardized platforms replace proprietary devices and can be configured for various SDN and NFV applications, reducing both management complexity and operational expenses while maintaining adaptability
2Productivity
If SDN-based channel estimation and multiplexing are implemented, then network capacity and resource utilization are improved, but system complexity and implementation difficulty increase
Solution Approach 1:
The system introduces an SDN controller as an intermediary that manages channel estimation and multiplexing operations. The controller handles the complex computations and decision-making, while the network hardware executes simplified operations, thereby increasing network capacity without proportionally increasing implementation difficulty
Solution Approach 2:
The system performs channel estimation and resource allocation in advance using SDN-based planning. By pre-calculating optimal channel configurations and resource assignments before actual data transmission, the system achieves high network capacity while reducing real-time processing complexity
3Reliability
If dynamic reconfiguration of backhaul forwarding topology is performed, then network reliability and latency reduction are improved, but control overhead and processing burden increase
Solution Approach 1:
The system implements dynamic reconfiguration of backhaul forwarding topology that adapts to changing network conditions. The SDN controller monitors network state and automatically adjusts forwarding paths in real-time, improving reliability and reducing latency while optimizing control overhead through event-triggered updates rather than continuous reconfiguration
Solution Approach 2:
The system changes key operational parameters such as forwarding paths, bandwidth allocations, and routing metrics dynamically based on network conditions. By adjusting these parameters efficiently through SDN control, the system achieves improved reliability and latency performance while minimizing the processing burden and control overhead
Data Source
AI summary
A system for providing small cell backhaul network communications includes a small cell backhaul network including a plurality of small cell network nodes each including transceivers for establishing wireless communication links with at least two other small cell network nodes and enabling communication with the at least two other small cell network nodes within the small cell backhaul network. The small cell backhaul network interconnecting an edge network with a core network through the plurality of small cell network nodes and enabling communication between the edge network and the core network over the wireless communications links. A software defined network (SDN) controller controls wireless communications links with each of the plurality of small cell network nodes. The transceivers at each of the plurality of small cell network nodes establish link configurations between the small cell network node and the at least two other small cell network nodes of the small cell backhaul network. A plurality of LTE interfaces, each associated with one of the small cell network nodes of the small cell backhaul network for provide control plane connectivity between the small cell network nodes and the SDN controller via a control channel and reduce SDN control latency.