FRAME SYNCHRONIZATION SYSTEM BETWEEN BASE STATIONS OF MOBILE RADIO COMMUNICATION SYSTEM AND BASE STATION DEVICE EMPLOYING THIS SYSTEM
First Claim
1. An inter-base-station frame synchronous system in a mobile communication system comprising:
- plural base stations dispersively arranged within a service area and connected to a communication network, and having at least one master base station and plural slave base stations; and
plural mobile stations wirelessly connected to said plural base stations by a time-division bidirectional multiplex system, wherein said master base station comprises;
time information receiving means for receiving time information with high precision externally supplied;
reference frame timing generating means for generating reference frame timing for said time-division multiplex connection in synchronization with predetermined synchronous setting timing set on the basis of said time information; and
first control channel signal transmitting means for transmitting a control channel signal to said plural slave base stations located around its own station in synchronization with said reference frame timing, wherein said slave base stations comprise;
control channel signal observation period setting means in which a predetermined period from a first receiving time point of a control channel signal transmitted from said master base station or other slave base stations during said frame synchronization control period is set to a control channel signal observation period;
its own station frame timing generating means for generating its own station frame timing on the basis of receiving timing of the control channel signal transmitted from said master base station or one of the other slave base stations when only this control channel signal is received during said control channel signal observation period set by said control channel signal observation period setting means, said its own station frame timing generating means also generating its own station frame timing on the basis of one of receiving timings of control channel signals respectively transmitted from said master base station or plural slave base stations among the other slave base stations when these control channel signals are received during said control channel signal observation period; and
second control channel signal transmitting means for transmitting each control channel signal in synchronization with said its own station frame timing after said control channel signal observation period is terminated.
1 Assignment
0 Petitions
Accused Products
Abstract
An inter-base station frame synchronization system for use in a mobile communication system includes at least one master base station and a plurality of slave base stations. The master base station is provided with time information receiving means for receiving time information with high precision externally supplied, reference frame timing generation means for generating a reference frame timing on the basis of the time information, and first control channel signal transmission means for transmitting a control channel signal to the slave base stations in synchronism with the reference frame timing. Each of the slave base stations is provided with its own station frame timing generation means for generating an its own station frame timing on the basis of the reception timing of one of the control channel signals transmitted from the master base station and other slave base stations, and second control channel signal transmission means for transmitting a control channel signal in synchronism with the its own station frame timing.
-
Citations
16 Claims
-
1. An inter-base-station frame synchronous system in a mobile communication system comprising:
-
plural base stations dispersively arranged within a service area and connected to a communication network, and having at least one master base station and plural slave base stations; and
plural mobile stations wirelessly connected to said plural base stations by a time-division bidirectional multiplex system, wherein said master base station comprises;
time information receiving means for receiving time information with high precision externally supplied;
reference frame timing generating means for generating reference frame timing for said time-division multiplex connection in synchronization with predetermined synchronous setting timing set on the basis of said time information; and
first control channel signal transmitting means for transmitting a control channel signal to said plural slave base stations located around its own station in synchronization with said reference frame timing, wherein said slave base stations comprise;
control channel signal observation period setting means in which a predetermined period from a first receiving time point of a control channel signal transmitted from said master base station or other slave base stations during said frame synchronization control period is set to a control channel signal observation period;
its own station frame timing generating means for generating its own station frame timing on the basis of receiving timing of the control channel signal transmitted from said master base station or one of the other slave base stations when only this control channel signal is received during said control channel signal observation period set by said control channel signal observation period setting means, said its own station frame timing generating means also generating its own station frame timing on the basis of one of receiving timings of control channel signals respectively transmitted from said master base station or plural slave base stations among the other slave base stations when these control channel signals are received during said control channel signal observation period; and
second control channel signal transmitting means for transmitting each control channel signal in synchronization with said its own station frame timing after said control channel signal observation period is terminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A base station apparatus dispersively arranged within a service area and used as a slave base station among plural base stations wirelessly connected to plural mobile stations by a time-division bidirectional multiplex system, the base station apparatus comprising:
-
control channel signal observation period setting means in which a predetermined period from a first receiving time point of a control channel signal transmitted from other base stations is set to a control channel signal observation period;
its own station frame timing generating means for generating its own station frame timing on the basis of receiving timing of the control channel signal transmitted from one of said other base stations when only this control channel signal is received during said control channel signal observation period, said its own station frame timing generating means also generating its own station frame timing on the basis of one of receiving timings of control channel signals respectively transmitted from plural base stations among said other base stations when these control channel signals are received during said control channel signal observation period; and
control channel signal transmitting means for transmitting each control channel signal in synchronization with said its own station frame timing after said control channel signal observation period is terminated.
-
Specification