JP2806742B2 - Initial adjustment circuit in time division multi-way multiplex communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an initial adjustment circuit,
More particularly, the present invention relates to an initial adjustment circuit in a time division multi-way multiplex communication device.

[0002]

2. Description of the Related Art The initial position adjustment of a conventional time-division multi-way multiplex communication apparatus of this type is disclosed, for example, in Japanese Patent Laid-Open Publication No. 59-002445.
No. 4 discloses this. According to the initial position adjustment described in this publication, first, the distance between the master station and the slave station from the map and the distance from the radio to the antenna of each station are calculated to predict the correct timing. .

In the initial position adjustment described in Japanese Patent Application Laid-Open No. 62-128632, a distance difference detection circuit is provided in a slave station, and a delay time correction circuit is adjusted by a phase error signal from a master station to adjust the phase. The burst for initialization is transmitted until the error disappears.

In the prior art described in Japanese Patent Application Laid-Open No. 63-191430, there is provided a means for transmitting an initial adjustment pattern having a width of one bit or more and error correction bits or less to a master station and slave stations. The master station sequentially changes the control value of the bit delay amount for the slave station, and determines the designated bit delay amount control value and the burst position where an error occurs in the signal train from each slave station to the master station. , The distance between the master station and the slave station is calculated to determine the delay control value, and the slave station varies the burst transmission position according to the delay control value.

[0005]

However, in the above-mentioned conventional initial position adjustment, the transmission timing is set by obtaining the distance between the master station and the slave station, so that a manual operation is required. Or the circuit becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem and provide a slave station with a circuit for switching the transmission timing of an initial position adjustment burst, thereby making it possible to adjust the initial position without performing initial setting. An object of the present invention is to provide an initial adjustment circuit in a divided multi-way multiplex communication system.

[0007]

Means for Solving the Problems The present invention provides an initial adjustment in a time-division multi-way multiplex communication system including one master station and a plurality of slave stations communicating with the master station using radio waves. The master station has means for monitoring an initial position adjustment burst, and means for time-division multiplexing information necessary for initial position adjustment of a slave station into a transmission signal and transmitting the information to the slave station. The slave station transmits the initial position adjustment burst to the master station; means for monitoring information necessary for the slave station initial position adjustment burst; and When the information necessary for the burst is detected from the received signal, means for stopping transmission of the initial position adjustment burst, and when the information required for the initial position adjustment burst of the slave station is not detected from the received signal, The burst for initial position adjustment And delay amount control means for delaying the transmission timing.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a time division multi-directional multiplex communication system to which the present invention is applied. In the figure, a master station 10 includes a radio transmission / reception circuit 11, a burst detection circuit 12 for detecting a burst for initial position adjustment, and time division multiplexing of information (ACQ information) necessary for initial position adjustment of a slave station into a transmission signal. An ACQ information multiplexing circuit 13 and a signal processing circuit 14 are provided. The slave station 20 includes a signal processing circuit 21, a delay amount control circuit 22 for switching the transmission timing of the initial position adjustment burst, and an AC
An ACQ information detection circuit 23 for detecting Q information and a wireless transmission / reception circuit 24 are provided.

Next, the operation of this embodiment will be described. First, when power is turned on in the slave station 20, the slave station 20 transmits a burst for initial position adjustment to the master station 10. In the master station 10, when the burst detection circuit 12 detects this burst within a specific timing, the ACQ information multiplexing circuit 13 sets the slave station 2
The ACQ information of 0 is time-division multiplexed into a transmission signal. Thereafter, the master station 10 transmits the ACQ information to the slave station. The ACQ information detection circuit 23 of the slave station 20
Detect Q information. When the slave station 20 recognizes the correct transmission timing of the own station from this information, the slave station 20 ends the initial position adjustment and stops the burst transmission.

On the other hand, if the slave station does not detect the ACQ information from the master station within a predetermined time after transmitting the burst, the delay control circuit 22 of the slave station switches the burst transmission timing. Then, the slave station 20 transmits the initial position adjustment burst to the master station 10 again. By repeating this series of operations, the slave station transmits a burst signal within a specific timing of the master station, and ends the initial position adjustment.

As described above, according to the present invention,
By providing the slave station with a circuit for switching the transmission timing of the initial position adjustment burst, it is possible to obtain an effect that the initial adjustment can be performed in the time division multi-directional multiplex communication system without performing the initial setting. Also, since the slave station controls the delay amount based on the ACQ information from the master station,
The configuration of the slave station can be simplified, and the slave station can be downsized and the power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 master station 11 wireless transmission / reception device 12 burst detection circuit 13 ACQ information multiplexing circuit 14 signal processing circuit 20 slave station 21 signal processing circuit 22 delay amount control circuit 23 ACQ information detection circuit 24 wireless transmission / reception circuit

Claims (1)

(57) [Claims] 1. An initial adjustment circuit in a time-division multi-directional multiplex communication system comprising one master station and a plurality of slave stations communicating with the master station by using radio waves, wherein the master station is provided. Has means for monitoring a burst for initial position adjustment, and means for time-division multiplexing information necessary for initial position adjustment of the slave station into a transmission signal and transmitting the information to the slave station, wherein the slave station includes: receiving means for transmitting an initial position adjusting burst to the master station, and means for monitoring the information necessary for the initial positioning burst of the slave station, the information necessary for the initial positioning burst of the slave station
If detected from the signal, the initial position adjustment burst
Means for stopping transmission of information and receiving information necessary for the initial position adjustment burst of the slave station.
If not detected from the signal, the berth for initial position adjustment
Initial adjustment circuit in the divided multi-directional multiplex communication system when; and a delay amount control means for delaying the transmission timing of bets.