Time-division multiplex communication system
First Claim
1. A time-division multiplex communication system comprising:
- a master station for transmitting a first down frame signal accompanied by a predetermined first repeater number;
a group of repeater stations each for transmitting a second down frame signal accompanied by a second repeater number, at least one of the repeater stations being connected to the master station for receiving the first down frame signal from the master station; and
a group of slave stations each for transmitting an up burst signal which is delayed by a fixed delay time corresponding to a third repeater number that is calculated by adding a predetermined number to a second repeater number transmitted from a repeater station which is a master with respect thereto;
said master station, group of repeater stations, and group of slave stations being connected at different layers in an hierarchical network such that said master station is connected to at least one of said group of repeater stations, each repeater station of said group of repeater stations is connected to at least one other repeater station of said group of repeater stations or one of the slave stations of said group of slave stations and each slave station of said group of slave stations is connected to at least one of said group of repeater stations;
each one of said group of repeater stations comprising;
frame synchronization determining means for determining whether said one of said group of repeater stations is in frame synchronization or frame asynchronization;
loop-back means for looping back said up burst signal transmitted from either one of said group of slave stations connected to said one of said group of repeater stations and which is a slave thereto or another of said group of repeater stations connected to said one of said group of repeater stations and which is a slave with respect thereto, when said frame synchronization determining means determines that said one of said group of repeater stations is in frame asynchronization; and
repeater number calculating means for calculating a second repeater number thereof depending on a number of layers from said master station based on said first repeater number when said frame synchronization determining means determines that said one of said group of repeater stations is in frame synchronization, and for making said second repeater number equal to said first repeater number irrespective of said number of layers from said master station when said frame synchronization determining means determines that said one of said group of repeater stations is in frame synchronization.
1 Assignment
0 Petitions
Accused Products
Abstract
Each of the repeater stations comprises a frame synchronization circuit, a loop-back circuit and a repeater number calculating circuit. The repeater number calculating circuit calculates the second repeater number thereof depending on the number of layers from the master station based on the first repeater number when the repeater station is in frame synchronization as determined by the frame synchronization circuit. The repeater number calculating circuit equalizes the second repeater number thereof to the first repeater number irrespective of the number of layers from the master station when the repeater station is in frame asynchronization as determined by the frame synchronization circuit.
-
Citations
7 Claims
-
1. A time-division multiplex communication system comprising:
-
a master station for transmitting a first down frame signal accompanied by a predetermined first repeater number; a group of repeater stations each for transmitting a second down frame signal accompanied by a second repeater number, at least one of the repeater stations being connected to the master station for receiving the first down frame signal from the master station; and a group of slave stations each for transmitting an up burst signal which is delayed by a fixed delay time corresponding to a third repeater number that is calculated by adding a predetermined number to a second repeater number transmitted from a repeater station which is a master with respect thereto; said master station, group of repeater stations, and group of slave stations being connected at different layers in an hierarchical network such that said master station is connected to at least one of said group of repeater stations, each repeater station of said group of repeater stations is connected to at least one other repeater station of said group of repeater stations or one of the slave stations of said group of slave stations and each slave station of said group of slave stations is connected to at least one of said group of repeater stations; each one of said group of repeater stations comprising; frame synchronization determining means for determining whether said one of said group of repeater stations is in frame synchronization or frame asynchronization; loop-back means for looping back said up burst signal transmitted from either one of said group of slave stations connected to said one of said group of repeater stations and which is a slave thereto or another of said group of repeater stations connected to said one of said group of repeater stations and which is a slave with respect thereto, when said frame synchronization determining means determines that said one of said group of repeater stations is in frame asynchronization; and repeater number calculating means for calculating a second repeater number thereof depending on a number of layers from said master station based on said first repeater number when said frame synchronization determining means determines that said one of said group of repeater stations is in frame synchronization, and for making said second repeater number equal to said first repeater number irrespective of said number of layers from said master station when said frame synchronization determining means determines that said one of said group of repeater stations is in frame synchronization. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification