ABSTRACT
According to a recent study by Cisco, mobile data traffic is expected to grow to 6.3 Exabytes per month by 2015, a 26−fold increase over 2010 [1]. In addition, mobile video will generate much of the mobile traffic growth by 2015. Of the 6.3 Exabytes per month wireless data traversing mobile wireless networks by 2015, 4.2 Exabytes will be related to video. This trend is driven by the overwhelming proliferation of intelligent handheld devices, which brings about the compelling need for ubiquitous access to video content over wireless access networks. This trend will significantly influence the design and operation of future wireless networks. Wireless video applications not only are bandwidth intensive, but also involve stringent user quality of experience (QoE) requirements. Under this context, the problems of green communications and power efficiency become ultimate important: it not only determines how long a wireless handheld device can operate without recharging battery, but also has significant implications on environmental issues.
