Study of Mobility in Cache-Enabled Wireless Heterogeneous Networks
Bitan Banerjee, Chintha Tellambura · 2017
Caching popular multimedia content has the potential to take wireless networking to an unprecedented height in terms of user experience. Primary motif behind content caching is to give frequent access to popular content cached at local caches, such as femto access point with finite storage. Although content-caching was Initially limited to wired backbone networks, it now being developed for wireless networks. The main difference between these two cases is the potential mobility of the user. We thus investigate the impact of user mobility on the performance of content-caching wireless heterogeneous networks (HetNets). We describe the user mobility by the random waypoint model and characterize the spatial randomness of different types of nodes by using independent Poisson point processes. Using their stochastic properties, we analyze the handover probabilities and evaluate expected download delay as a function of handover probabilities.