PERFORMANCE ANALYSIS OF CFDAMA-PB PROTOCOL FOR PACKET SATELLITE-COMMUNICATIONS

Combined free/demand-assignment multiple-access (CFDAMA) schemes are s uitable for broad-band packet satellite communications systems serving a finite number of bursty data sources [1], The performance analysis of the CFDAMA using piggy-backed (PB) reservation is presented in this paper. The probability generating function (pgf) of the packet delay is developed. The performance is evaluated in terms of three performan ce measures: average packet delay, variance of packet delay, and cumul ative probability distribution of packet delay. Performance comparison with other pertinent schemes shows CFDAMA-PB to be superior for a wid e range of user population sizes.