ANALYSIS OF BANDWIDTH ALLOCATION SCHEMES FOR TRANSMISSION OF VER VIDEO TRAFFIC ON A FODA SATELLITE NETWORK

FODA, an access protocol for satellite networks based on a TDMA techno logy, is designed to support integrated services, To this end, FODA pr ovides two types of service: synchronous and asynchronous; only the us ers of the synchronous service have guaranteed bandwidth. In the paper the authors focus on the synchronous service alone and investigate st atic bandwidth allocation strategies which satisfy the quality of serv ice (QoS) requirements (i.e. a limited transfer delay and a packet los s rate < 10(-6)) for the transmission of the data generated by a varia ble bit rate (VER) video codec. By solving an analytical model it is s hown that, due to the stringent QoS constraints, the amount of reserve d bandwidth for VER video applications must be much higher than their throughput, Hence a portion of low-priority traffic (e.g. EDP data) ca n be transmitted on the FODA synchronous services to utilise the satel lite link to the maximum extent. Via simulation, the authors analyse, for the bandwidth allocation schemes which provide an acceptable QoS f or high-priority traffic, the QoS available to low-priority users.