The widespread deployment of Web enabled mobile devices made them a target of choice for content creators. Understanding their strengths and their limitations, and using technologies that fit these conditions are keys to create success mobile friendly Web content . The reasons for that include the challenges posed by network costs & delays, memory & Central Processing Unit (CPU) limitations, and keyboard & pointing devices differences. As importantly, mobile devices feature a growing set of advantages with their personal, always available nature, and the increasingly context-aware capabilities.
Wireless Fidelity (Wi-Fi) is now the most mature technology of using wireless for Internet access. Energy limitations of mobile devices are still an issue and to deal with this limitation, the wireless standard 802.11 includes a Power Saving Mode (PSM), but not much attention has been devoted by the research community to understand the performance in depth. PSM is able to save up to 90% of the energy spent when no energy management is used, however PSM is not the optimal solution for energy management. The objective of the 802.11 PSM is to let the wireless interface of a mobile host in the active mode only for the time necessary to exchange data, and turn it off in sleep mode whenever it becomes idle. In a Wi-Fi hotspot, this is achieved by exploiting the central role of the access point. Each mobile host within the hotspot lets the access point know whether it utilizes the PSM or not. Since the access point relays every frame from/to any mobile host, it buffers frames addressed to mobile hosts using the PSM every beacon interval, usually 100 ms, the access point broadcasts a special frame named beacon.
The mobile Web is still evolving and this is an exciting time of early development, but there are still some hurdles that need to be overcome. As seen familiar brands such as Facebook and MySpace porting their presences to the mobile domain, users will see a wider adoption of this channel by the mainstream. When creating content for mobile devices, the designers are usually confronted with numerous development standards and technologies to choose from. In addition, hundreds of different mobile devices with varying functional capabilities, screen resolutions, and sizes are under consideration as well as more than 40 distinct mobile browsers. This lack of uniformity renders testing mobile websites and applications for universal compatibility a near impossibility. Mobile Web developers also brave the high expectations of mobile Web users who anticipate the same caliber experience on their handsets that they enjoy on the desktop Web.
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