| The great new era of information has witnessed rapid growth in the development and deployment of wireless services, evident from the proliferation of cellular data services and the emerging wireless multimedia applications. The next-generation mobile communication systems are expected to eventually carry multimedia traffic, including voice, video, images, data, or combinations of these, are required to provide high data-rate, high reliable transmission, and guarantee end-to-end QoS.However, the band has always been the most valuable resource of wireless communications, how to maximize limited bandwidth data transmission rate, that is how to maximize the efficient use of frequency bands, has become a mobile radio communications solutions to the key issues of the rational use of resources. Settlement of the new generation of cellular wireless communications systems in the transmission link quality of services and wireless resource management techniques is to reasonable use of the existing limited wireless resources, and ensure links in the transmission business QoS, while providing lower operating and management costs, thus ensuring the achievement of a new generation of wireless communications systems new business development.In this paper, we describe the wireless data link layer solutions for wireless multimedia cellular networks,analyse protocol of automatic repeat request (ARQ) to enhance the quality of wireless transmission,introduce the structure of the framework of QoS and wireless QoS control technology to support a new generation of cellular mobile communication system,write the program to make the function of mobile station handoffing among the access points,finally study PDU-based bandwidth allocation. |
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