Advanced Wireless Networks, 3rd Edition

18Stability of Advanced Network Architectures

In this chapter we introduce a number of advanced network topologies and analyze their stability. These advanced topologies include cooperative cognitive networks, dynamic Internet network topologies, and data centers with mobile clouds.

18.1 Stability of Cooperative Cognitive Wireless Networks

In this section, we discuss a number of cooperative strategies in cognitive wireless networks that generate additional capacity. By harvesting additional capacity, while maintaining the network stability, overall network performance can be significantly improved. We consider a mobile cloud with cooperative communication and queueing, and we study the problem of optimal resource allocation in the presence of uncertain channels. The channel uncertainty is due to fading and/or uncertain link availability in cognitive wireless networks. The control problem is to assign resources dynamically in reaction to changes in workloads and channel conditions in order to maximize the long-term average throughput of the system while providing bound on average delay. We illustrate the stability region of the cooperative communication network and present unified stability analysis for both primary and secondary service provider (SSP) cognitive networks as well as for conventional wireless network. In addition, a dynamic cooperative policy is discussed to mitigate the mutual impact of secondary and primary service provider (PSP) networks on each other and ...