Wireless signal transmission system with random access

Claim 2

A digital wireless communication method for tranferring data between a plurality of terminal stations (1) and a central station (2) with random access, characterized in that the method comprises the steps of: generating and transmitting, in the central station (2), data in accordance with a predetermined rule based on a signal transmitted from one of the terminal stations (1); comparing, in the one terminal station (1) which has been transmitted the signal, the data from the central station (2) with data restored in the one of terminal stations, after the original transmission starting, determining whether or not the central station (2) has correctly received the signal from the one terminal station (1); and suspending transmission of signals from the one of the terminal stations (1), for a predetermined period of time if the resultant by the determining step is not correct.

Claim 3

A mobile digital communication method for transferring data between a plurality of terminal stations (1) and a central station (2), characterized in that the method comprises the steps of: preparing and transmitting, in the central station (2), data of a transmission format including an I/B bit (37) indicating permission or inhibition of a new transmission at a next transmission timing of the terminal stations, an R/N bit (38) indicating reception or non-reception of signals from the terminal stations (1) at the central station (2), and partial data (39) produced from data received at the central station in accordance with a pre­determined rule based on the signals which the central station received from the terminal stations; preparing signal-length data W (44) to the transmission format in the terminal stations (1), the signal-length data W (44) representing the length of a signal to be transmitted from each terminal station; starting the new transmission of the signal or sig­nals containing the signal-length data W (44), from one or plural of the terminal stations to the central station when the I/B bit (37) indicates the permission of the new transmission; determining and transmitting, in the central device, the I/B bit (37), the R/N bit (38), and the par­tial data (39) in accordance with the reception of the signal-length data W (44) and the signal transmitted from one of the terminal stations; determining, in the one or plural of the terminal stations which have been transmitted, whether or not the signal has been correctly received at the central station, in accordance with the R/N bit (38) and the partial data (44) from the central station; and suspending transmission of signals from the one or plural of the terminal stations, for a predetermined period of time, when it is determined that the signal has not been correctly received at the central station.

Claim 4

A mobile digital communication method for transferring data between a plurality of terminal stations (1) and a central station (2), characterized in that the method comprises the steps of: preparing and transmitting, in the central station (2), data of a transmission format including an I/B bit (37) indicating permission or inhibition of a new transmission at a next transmission timing of the terminal stations, an R/N bit (38) indicating reception or non-reception of signals from the terminal stations (1) at the central station (2), and partial data (39) produced from data received at the central station in accordance with a pre­determined rule based on the signals which the central station received from the terminal stations; preparing signal-length data W (44) to the transmission format in the terminal stations (1), the signal-length data W (44) representing the length of a signal to be transmitted from each terminal station; starting the new transmission of the signal or sig­nals containing the signal-length data W (44), from one or plural of the terminal stations to the central station when the I/B bit (37) indicates the permission of the new transmission; determining and transmitting, in the central device, the I/B bit (37), the R/N bit (38), and the par­tial data (39) in accordance with the reception of the signal-length data W (44) and the signal transmitted from one of the terminal stations; determining, in the one or plural of the terminal stations which have been transmitted, whether or not the signal has been correctly received at the central station, in accordance with the R/N bit (38) and the partial data (44) from the central station; and suspending transmission of signals from the one or plural of the terminal stations, for a predetermined period of time, when it is determined that the signal has not been correctly received at the central station.

Claim 5

A mobile digital communication system for transferring data, in random access, between a plurality of terminal stations and a central station, character­ized in that the system comprises: means for preparing and transferring, in the cen­tral station, data of a transmission format including an I/B bit (37) indicating permission or inhibition of a new transmission of a next transmission timing of the terminal stations, an R/N bit (38) indicating reception or non-reception of signals from the terminal stations at the central station, and partial data (39) produced from data received at the central station in accordance with a predetermined rule based on the signals which the central station received from the terminal stations; means for preparing signal-length data W (44) to the transmission format in the terminal stations, the signal-length data W (44) representing the length of a signal to be transmitted from each terminal station; means for starting the new transmission of the sig­nal or signals containing the signal-length data W, from one or plural of the terminal stations to the central station, when the I/B bit (37) indicates the permission of the new transmission; means for determining and transmitting, in the central station, the I/B bit (37), the R/N bit (38), and the partial data (39) in accordance with the reception of the signal-length data W (44) and the signal trans­mitted from one of the terminal stations; means for determining, in the one or plural of the terminal station which have been transmitted, whether or not a signal has been correctly received at the central station, in accordance with the R/N bit (38) and the partial data (39); and means for suspending transmission of signals from the one or plural of the terminal stations, for a prede­termined period of time, when it is determined that the signal has not been correctly received at the central station.

Claim 6

A mobile digital communication system for transferring data, in random access, between a plurality of terminal stations and a central station, character­ized in that the system comprises: means for preparing and transferring, in the cen­tral station, data of a transmission format including an I/B bit (37) indicating permission or inhibition of a new transmission of a next transmission timing of the terminal stations, an R/N bit (38) indicating reception or non-reception of signals from the terminal stations at the central station, and partial data (39) produced from data received at the central station in accordance with a predetermined rule based on the signals which the central station received from the terminal stations; means for preparing signal-length data W (44) to the transmission format in the terminal stations, the signal-length data W (44) representing the length of a signal to be transmitted from each terminal station; means for starting the new transmission of the sig­nal or signals containing the signal-length data W, from one or plural of the terminal stations to the central station, when the I/B bit (37) indicates the permission of the new transmission; means for determining and transmitting, in the central station, the I/B bit (37), the R/N bit (38), and the partial data (39) in accordance with the reception of the signal-length data W (44) and the signal trans­mitted from one of the terminal stations; means for determining, in the one or plural of the terminal station which have been transmitted, whether or not a signal has been correctly received at the central station, in accordance with the R/N bit (38) and the partial data (39); and means for suspending transmission of signals from the one or plural of the terminal stations, for a prede­termined period of time, when it is determined that the signal has not been correctly received at the central station.