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This paper describes the challenges of adaptingexisting web-service architecture to the wirelessenvironment. It presents a new, wireless, web-servicearchitecture based on the smart client model that canaddress some of the fundamental differences betweenthe wireless and wireline environments. Thefundamental differences between these environmentscan be called the mobile challenges, including (1) theunpredictable nature of the wireless network, (2) thelimited processing capabilities and power on mobiledevices, and (3) the need for consumer device to havea fast startup time for mobile applications.The smart client model suggests the followingmodifications to the existing web-service stack in orderto overcome these mobile challenges: (1) a lightweightweb-service container that runs on a resource-limitedmobile device (the client), (2) a quality of userexperience (QoUE) model based on applicationresponse time, application startup time, and powerconsumption, and (3) an adaptive applicationconfiguration algorithm that can exploit the tradeoffamong the QoUE parameters to provide the best userexperience given preferences and the device platform.