Enhancements in Wireless Broadband Networks using Smart Caching

Since ubiquitous mobile communication is already true in many countries in the future the provisioning of broadband access for mobile users is the key functionality. For mobile users the performance of the radio network vitally depends on the length and the characteristic of the transmission path between user terminal and access point. Due to the continuously changing conditions the link quality will be subject to high variations which make especially broadband services hard to realize. In urban environments a full broadband coverage is therefore hard to provide. In the following the Smart Caching technology is presented which allows the overcoming of these problems at least for non-real-time and non-interactive services. It uses the approach of pre-fetching and buffering data at the edge of the core network and transmitting it whenever the user gets connected to an access node with broadband connectivity. The paper provides a detailed description of Smart Caching and an analytical evaluation of the advantages of Smart Caching enabled networks compared to legacy setups. Furthermore dimensioning issues are covered. For the analysis advanced queuing theory is used. User services are modeled in very detail as well as radio link, network and user behavior.