Joint Power Allocation and Routing for Software Defined Networks
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Solution Overview
Problem
Current network resource management systems in cellular radio systems face inefficiencies due to interdependent and non-coordinated power and network allocation, leading to idle resource capacity and suboptimal performance in wireless communications.
Innovation Solution
The implementation of a combined alternating direction method of multipliers (ADMM) algorithm with a weighted minimum mean square error (WMMSE) process for joint traffic engineering and physical layer power control, enabling dynamic optimization of power/frequency allocation and network routing to avoid idle resources and improve system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate power allocation and network routing management are used, then system complexity is reduced, but resource utilization efficiency deteriorates leading to idle capacity
Solution Approach 1:
The patent combines separate power allocation and network routing management into a unified joint optimization system. The SDN controller integrates both functions to simultaneously optimize power/frequency allocation at the radio access network and routing decisions in the backhaul network, eliminating idle resource capacity through coordinated management while maintaining manageable system complexity through centralized control.
2Productivity
If joint optimization is implemented, then throughput increases, but computational complexity increases
Solution Approach 1:
The patent segments the joint optimization problem into two coordinated sub-problems: power/frequency allocation optimization at the radio access network level and routing optimization at the backhaul network level. The SDN controller divides the computational tasks, with local base stations handling power allocation and the central controller handling routing decisions, enabling parallel computation and reducing overall computational complexity while achieving joint optimization benefits.
3Loss of energy
If coordinated power and routing control is used, then idle resources are reduced, but control overhead increases
Solution Approach 1:
The SDN controller acts as an intermediary that coordinates between the radio access network and backhaul network. It collects necessary information from distributed base stations, performs centralized routing optimization, and sends back control decisions. This intermediary approach enables coordinated power and routing control to minimize idle resources while managing control overhead through efficient information aggregation and distributed decision-making.
Data Source
AI summary
An embodiment of a method for network resource management comprises performing joint traffic engineering and physical layer power control on a controller and using a routing and power control optimization process that comprises a combined alternating direction method of multipliers (ADMM) process and a power management process. First and second commands are generated at the controller according to optimization parameters determined by the routing and power control optimization process. The first and second commands are transmitted from the controller to nodes connected to the controller. The first commands are for modifying transmission parameters for links between nodes and the second commands are for modifying transmission parameters for connections between nodes and user devices.