In the field of computer networking and other packet-switched telecommunication networks, the traffic engineering term quality of service (QoS) refers to resource reservation control mechanisms rather than the achieved service quality. Quality of service is the ability to provide different priority to different applications, users or data flows, or to guarantee a certain level of performance to a data flow. This book presents current research from across the globe in the study of network quality of service, including resource allocation in next generation networks; QoS management by active grid information servers in grid computing; radio resource management architecture for wireless networks; IP-Based QoS architecture for cloud services; analysis of WiMax and WiFi integration and quality of service in wireless local area networks.