ABSTRACT
Software-defined networking and in-network caching are promising technologies in next generation wireless networks. In this chapter, the authors propose to enhance quality of experience (QoE)-aware wireless edge caching with bandwidth provisioning in software-defined wireless networks (SDWNs). They design a novel mechanism to jointly provide proactive caching, bandwidth provisioning and adaptive video streaming. The authors formulate a novel optimization problem regarding the QoE-aware bandwidth provisioning in SDWNs with jointly considering in-network caching strategy. The caching problem is decoupled from the bandwidth provisioning problem by deploying the dual decomposition method. Additionally, the authors relax the binary variables to real numbers so that those two problems are formulated as a linear problem and a convex problem, respectively, which can be solved efficiently. They present the system model of the HetNet, dynamic caching, service QoE and related assumptions. The authors propose a low complexity algorithm to solve the problem so that the upper bound can be achieved.
