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Point-to-Multipoint Packet Radio Systems
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    초록·키워드

    A new PMPS scheme based on packet switching is investigated, in which a protocol combining contention mechanism with reservation is proposed to control the access of the shared up link. This scheme is characterized not only by its effective integration of different services but also by the flexible incorporation of different rates of transmission. The system has the advantages of statistical multiplexing and error free data transmission, and its capacity for voice transmission is similar to that of TDMA PMPS in most applications. incorporating different services and supporting different bit rates of transmission. In other words one system should meet the needs of most applications. Economy is another issue of our design considerations. PMPSs reduce the costs per line of common hardware by sharing system resources among customers clustered around outstations. So it is more economical for PMPSs to serve clusters of users than individual users. In fact most PMPSs applications are clusters oriented and almost all PMPSs have been design for this situation. Regarding the above considerations as the bases for our target PMPSs, our goal is: 1.Integration of Services; 2.Supporting different rates channel transmission; 3.Cluster oriented.

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      UCI(KEPA) : I410-ECN-0101-2009-567-012208538