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US 4,736,371 AGranted
Satellite communications system with random multiple access and time slot reservation
AssigneeNEC Corporation
InventorsShunichiro Tejima, Akira Fujii
Life of this patent
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AssigneeNEC Corporation
InventorsShunichiro Tejima, Akira Fujii
Estimating the term…
A multiple access data communication system is disclosed wherein a communication channel is shared by a plurality of stations. The channel is divided into frames each being partitioned into time slots smaller in number than the number of stations of the system. A reservation status signal is constantly broadcast at frame intervals from a central station to all remote stations to indicate reserved status of the time slots. When a transmission request is made in a remote station, it discriminates a message signal shorter than the time slot length as a single packet having a time slot length and detects an idle time slot from the channel using the reservation status signal. If the message signal is longer than the time slot length, the station divides it into a series of packets of the time slot length and transmits a reservation request to the central station to receive from it a time-slot assignment signal and inserts the long-message packets to time slots specified by the time-slot assignment signal.
A multiple access data communication system having a communication channel for interconnecting a central station and a plurality of remote stations, wherein each of said remote stations transmits a message signal on said channel to said central station which broadcasts a return message signal to said remote stations, said communication channel being divided into frames each having a predetermined number of time slots of equal length,
A multiple access data communication system having a communication channel for interconnecting a plurality of stations, said channel being divided into frames each having a predetermined number of time slots of equal length, comprising:
A method for assigning time slots in a multiple access data communication system having a communication channel for transmitting a message signal from each of a plurality of remote stations to a central station which in turn broadcasts a return message signal to said remote stations, said communication channel being divided into frames each having a predetermined number of time slots of equal length, the method comprising the steps of:
Dependencies are inferred from the claim text.