Method for correction of trouble in digital signal transmission system

Claim 2

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and causing a station, (exclusive of said stations which have transmitted the master packets relating to said collision) with the highest priority for qualification to function as a new master station to transmit master packets for the purpose of taking over the function of master station, thereby establishing system timing.

Claim 3

A method according to claim 1, wherein the master packets of the new master station which has taken over the function of master station are transmitted in the same block in which the master packets were transmitted before said collision.

Claim 4

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and causing a station (exclusive of the station assuming the status of master station before said collision) with the highest priority for qualification to function as a new master station to transmit master packets for the purpose of taking over the function of master station thereby establishing system timing.

Claim 5

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and causing a station (exclusive of the station assuming the status of master station before said collision) with the highest priority for qualification to function as a new master station to transmit master packets for the purpose of taking over the function of master station thereby establishing system timing.

Claim 6

A method according to claim 3, wherein the master packets of the new master station which has taken over the function of master station are transmitted in the same block in which the master packets were transmitted before said collision.

Claim 7

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and causing a station, (inclusive of said stations which have transmitted said master packets relating to said collision) with the highest priority for qualification to function as a new master station to transmit master packets for the purpose of taking over the functions of master station thereby establishing system timing.

Claim 8

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and causing a station, (inclusive of said stations which have transmitted said master packets relating to said collision) with the highest priority for qualification to function as a new master station to transmit master packets for the purpose of taking over the functions of master station thereby establishing system timing.

Claim 9

A method according to claim 5, wherein the master packets of the new master station which has taken over the function of master station are transmitted in the same block in which the master packets were transmitted before said collision.

Claim 10

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and checking remaining stations (which did not generate packets involved in the collision), to identify the station having highest priority for qualification as a new master station and causing the station so identified to take over the function of master station, thereby establishing system timing.

Claim 11

In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission and reception of signals in the form of packets among a multiplicity of personal stations by causing digital signals transferred on a transmission cable to be fixedly positioned within periodically repeating frames along a time axis and further dividing each of the frames on said time axis into unit blocks thereby providing said personal stations with chances for digital signal transmission, a method for the correction of troubles in said digital signal transmission system which comprises detecting occurrence of a collision between master packets transmitted from two or more stations seeking to take leadership in system timing and, in response to said detection of said collision, discontinuing further transmission of master packets from all the stations which have transmitted said master packets relating to said collision, and checking remaining stations (which did not generate packets involved in the collision), to identify the station having highest priority for qualification as a new master station and causing the station so identified to take over the function of master station, thereby establishing system timing.