SDN Controller Bandwidth Sharing for Terminal Small Cells
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Solution Overview
Problem
Current technologies face challenges in effectively utilizing global status information for wireless backhaul sharing between Terminal Small Cells (T-SCs), limiting the flexibility and efficiency of bandwidth configuration in wireless backhaul networks.
Innovation Solution
A bandwidth-sharing method based on Software-Defined Network (SDN) control, where an SDN controller determines trigger requests for bandwidth sharing between T-SCs, selects appropriate T-SCs, and configures routing policies to jointly process high-bandwidth services, integrating global topology for optimal data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless backhaul sharing between T-SCs is implemented without SDN control, then flexibility in deployment is improved, but bandwidth configuration efficiency deteriorates due to ineffective utilization of global status information
Solution Approach 1:
An SDN controller is introduced as an intermediary between T-SCs and the core network. The controller collects global status information from multiple T-SCs including bandwidth availability, energy consumption states, and service requirements, then intelligently allocates bandwidth resources based on comprehensive network conditions rather than local decisions alone.
Solution Approach 2:
The system implements feedback mechanisms where T-SCs report their status information (bandwidth usage, energy levels, service quality) to the SDN controller, which then adjusts bandwidth allocation dynamically. This closed-loop control enables continuous optimization of bandwidth configuration based on real-time network conditions.
2Quantity of substance
If multiple T-SCs jointly process high-bandwidth services, then data transmission capacity is improved, but system complexity increases due to routing coordination requirements
Solution Approach 1:
The routing coordination function is extracted from individual T-SCs and centralized in the SDN controller. The controller receives routing policies from the core network and distributes them to appropriate T-SCs, eliminating the need for complex peer-to-peer coordination between T-SCs while enabling joint processing of high-bandwidth services.
3Quantity of substance
If SDN controller bundles bandwidth resources of multiple T-SCs, then bandwidth availability for high-bandwidth services is improved, but control complexity increases
Solution Approach 1:
The SDN controller merges bandwidth resources from multiple T-SCs into a pooled resource pool. By combining available bandwidth from several T-SCs, the system can allocate sufficient capacity to high-bandwidth services that would exceed the capabilities of any single T-SC, while the controller manages this consolidation through automated resource aggregation algorithms.
Data Source
AI summary
A bandwidth sharing method and device based on SDN control of terminal cell are disclosed. The bandwidth sharing method includes: determining, by a SDN controller, whether a trigger request for bandwidth sharing is received; upon receipt of the trigger request, selecting at least one second terminal cell for providing bandwidth sharing to the first terminal cell; controlling the first terminal cell and the at least one second terminal cell to jointly process the target service. The trigger request indicates a need of bandwidth sharing of a first terminal cell from other terminal cells when processing a target service on a backhaul link, and a bandwidth requirement of the target service equals to or exceeds a first predetermined threshold. The SDN controlled bandwidth-sharing scheme may ensure the application of a wireless backhaul sharing mechanism between T-SCs, thereby achieving flexible configuration of bandwidth resources on the backhaul link.