US 6,151,329 AGranted

Transmission control method between a plurality of stations

AssigneeU.S. Philips Corporation

InventorsMarouane Berrada, Americo Brajal, Heba Koraitim

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Abstract

A communication protocol for use by stations in multiple access telecommunication network wherein communication between stations is via a master station. An upstream channel to the master station is shared by the other stations and has successive frames each consisting of K message slots, each message slot including a data part (DM) for the transmission of a message and M minislots for transmission of slot reservation signals. According to the invention, in case of unsuccessful message transmission and collision between transmission requests, reservation signals for retransmission of a message can be transmitted in any of the K.times.M minislots of each entire frame. The large number of minislots thereby made available reduces the danger of collision between retransmission requests.

Claims3

Dependent claims

A method of controlling the transmission of messages between a plurality of stations in a multiple access telecommunications network wherein said stations are interconnected via a main station over a communication channel having an upstream channel at least partially shared by said stations;

the upstream channel being divided into successive frames of predetermined length, each frame consisting of K message slots each of which has a data part for transmission of a message generated by a station, and M minislots in which, in case of unsuccessful transmission of messages, retransmission requests can be transmitted in the form of available data slot reservation signals;
wherein a reservation signal corresponding to a retransmission request can be transmitted by a station in any of the K.times.M minislots of the frame, not just a minislot of a message slot selected by such station for transmission of a message.

Dependencies are inferred from the claim text.