Optimizing Content Delivery in Wireless Networks
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Wireless networks all over the world are being upgraded to support 2.5 and 3G mobile data services. GPRS and UMTS networks in Europe, and CDMA 1xRTT and CDMA 2000 networks in the USA and Asia are currently being deployed and tested to provide Wireless data services that enable ubiquitous mobile access to IP-based applications. During recent years a lot of attention has been paid to improving the physical and the MAC Wireless layers. Thus, advances in coding mechanisms, FEC, and scheduling algorithms have been critical for the success of these technologies. However, despite of the advances in layer-2 techniques and the momentum behind these networks, surprisingly little attention has been paid to evaluating how efficient content delivery can be achieved over cellular networks and how the different protocol stacks interact with the Wireless bearer.
In this chapter we consider how to provide efficient content delivery in wireless networks. To this extend, we examine the main performance problems suffered by transport-level, session-level and application-level protocols in wireless networks. We present several practical experience results, and study how Wireless Performance Enhancing Proxies can improve content delivery over such networks.
KeywordsCellular wireless networks PEPS content delivery optimizations
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