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首页> 美国政府科技报告 >Spacelab system analysis: The modified free access protocol: An access protocol for communication systems with periodic and Poisson traffic
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Spacelab system analysis: The modified free access protocol: An access protocol for communication systems with periodic and Poisson traffic

机译：spacelab系统分析：修改后的自由访问协议：具有周期性和泊松流量的通信系统的访问协议

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The protocol definition and terminal hardware for the modified free access protocol, a communications protocol similar to Ethernet, are developed. A MFA protocol simulator and a CSMA/CD math model are also developed. The protocol is tailored to communication systems where the total traffic may be divided into scheduled traffic and Poisson traffic. The scheduled traffic should occur on a periodic basis but may occur after a given event such as a request for data from a large number of stations. The Poisson traffic will include alarms and other random traffic. The purpose of the protocol is to guarantee that scheduled packets will be delivered without collision. This is required in many control and data collection systems. The protocol uses standard Ethernet hardware and software requiring minimum modifications to an existing system. The modification to the protocol only affects the Ethernet transmission privileges and does not effect the Ethernet receiver.

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