Resource Management in Virtual Wireless Networks
Abstract
The main mechanism to cope with the increasing traffic demand in cellular networks is to deploy base stations more densely. A consequence of such a deployment is the higher operational expenditure imposed on mobile network operators. This happens while the revenue per bit transferred is decreasing at a fast rate which motivates designing new methods to curb the operational expenditure. A promising approach to achieve this goal is virtualization. Virtualization refers to decoupling of the physical infrastructure from its services, pooling the infrastructure’s resources, and sharing them among multiple mobile virtual network operators which can lead to better utilization of the infrastructure and lower operational expenditure for each operator. In such a system, two problems arise:
1. How to minimize the infrastructure provider’s operational cost? While there are
several places to look for saving opportunities, we focus on minimizing the infrastructure’s energy consumption via dynamic activation of base stations.
2. How to minimize a mobile virtual network operator’s operational cost? The operational cost of a virtual network operator is largely dependent on the cost of acquiring bandwidth from the infrastructure provider. We focus on minimizing this cost where reservation-based and on-demand bandwidth acquisition modes are provided.
The goal of this thesis is to answer these two problems. With regard to the former
problem, based on the Lyapunov optimization framework, a controller is designed that dynamically adapts the network capacity to the traffic demand. Algorithms for implementing the controller in centralized and distributed settings are presented. The latter problem is formulated as a robust optimization problem. The optimal bandwidth reservation policies are derived when the low order statistics of the traffic demand are known to the mobile virtual network operator.
Description
Keywords
Computer Science
Citation
Abbasi, A. (2016). Resource Management in Virtual Wireless Networks (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/27647