JPH06314997A - Radio telephone controller - Google Patents

Abstract

(57) [Abstract] [Purpose] The synchronization signal is obtained using the GPS time signal sent from the satellite, and slot synchronization is performed in accordance with this synchronization signal to prevent radio wave interference between wireless telephone control devices. Try to prevent it. [Configuration] Radiotelephone control device A for portable radiotelephone system
Includes wireless control means 1, GPS means 13, time updating means 14,
The time and synchronization signal generation means 15 is provided, the GPS time is corrected to the current time by the time update means 14, the time of the internal clock of the radiotelephone control device is updated, and the time and synchronization signal generation means 15 uses the internal clock as a reference. To generate a sync signal. As a result, it is possible to reduce slot interference of the control channel and the communication channel with the peripheral wireless telephone control device, and improve the communication quality and frequency utilization efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention synchronizes the radiotelephone control devices when a plurality of radiotelephone control devices for controlling portable radio handsets are adjacent to each other to reduce interference between control signals and communication signals. The present invention relates to a radiotelephone control device that is capable of transmitting the current time data to a portable radio cordless handset.

[0002]

2. Description of the Related Art In the case of obtaining a synchronizing signal in a radiotelephone control device of a portable radio handset, it is conventionally transmitted from the center of the radiotelephone control device through a line, or the radiotelephone control devices perform radio communication and synchronize. The wireless telephone control device is synchronized by the two methods.
Here, a subordinate synchronization type radiotelephone control device which is transmitted from the center and synchronizes in the conventional example will be described.

FIG. 6 is a block diagram showing the configuration of a conventional radiotelephone control device. In the wireless telephone control device A of FIG. 6, 1 is a wireless control means that enables transmission of call control between the portable wireless handset B and the wireless telephone control device, and 2 is communication between the wireless telephone control device and the portable wireless handset. An antenna 3 for inputting the current time data to the time generation means 4, and the time generation means 4 updates the time by updating the time with the data obtained by the time data input means 3. The current time is generated based on the time of day. Reference numeral 5 is a sync signal generating means for changing the sync signal sent from the control data interface means 7 into a sync signal of 20 msec which can be used by the radio control means 1, and 6 is for sending the current time to the portable radio handset B. The time data sending means and the control data interface means 7 are a radio telephone controller and a center C.
Upload and download data with. Reference numeral 8 is a line connecting the control data interface means 7 to the center C, 9 is a station line interface means for the radiotelephone control device A communicating with the portable radio slave B to connect to the public network D, and 10 is a station line. A line connecting the interface means 9 and the public network D, 11 is a voice signal path switching means for connecting a communication path between the portable wireless handset B and the public network D, and 12 is a control means for controlling each of the above means. .

Next, the case where the radiotelephone control device A takes in a synchronizing signal from the line 8 and communicates with the portable radio handset B will be described. FIG. 7 is a signal sequence chart showing a case where the conventional radiotelephone control device A obtains a sync signal from the center and sends communication data corresponding to the sync signal to the portable radio handset B.

First, the synchronizing signal is periodically stored in the control data interface means 7 through the line 8 by detecting the synchronizing signal from the center C. The control data interface means 7 converts the received synchronizing signal into the synchronizing signal generating means 5.
Send to. The sync signal generation means 5 receives the sync signal, converts the sync signal into a sync signal of 20 msec, and sends the sync signal to the wireless control means 1. The wireless control means 1 receives the synchronization signal and expresses it as a transmission / reception information format corresponding to the synchronization signal. The expressed information makes it possible to perform communication while preventing the synchronization shift interference between the mobile wireless slave device B and the connection device.

[0006]

As described above, in the radio telephone control device of the digital portable radio telephone system, when the radio telephone control devices are synchronized with each other, conventionally, a center from a center as shown in FIG. 6 is used. Synchronization was performed by a subordinate signal based on a synchronization signal, or wireless radio telephone control devices were synchronized by a wireless mutual synchronization method.In the former case, a line for outputting a synchronization signal is required, and in the latter case, a radio telephone When the communication between the control devices was not possible, the synchronization could not be established.

An object of the present invention is to solve the problems in the former case, to make the synchronous reception inexpensive, and to realize the synchronization between the radiotelephone control devices with a simple structure.

[0008]

In order to achieve the above object, the present invention provides a radiotelephone control device for a digital portable radiotelephone system, wherein a radio for performing call control between the radiotelephone control device and the portable radio slave device. Control means, antenna means for performing communication between the wireless telephone control device and the portable wireless slave device, and GP
Time updating means for detecting bit information of S time and updating the current time, time and synchronizing signal generating means for generating a synchronization signal based on the time updated by the time updating means, and operation control of each means It is characterized by having a control means for performing.

[0009]

According to the present invention, the radiotelephone control device inputs the time data received from the GPS means to the time and sync signal generating means via the time updating means. The time / synchronization signal generation means generates a synchronization signal, interrupts it as a 20 msec synchronization signal, and wirelessly communicates with the portable wireless handset by using the interrupt synchronization signal as slot synchronization.

[0010]

First, prior to the description of the embodiments of the present invention, the GP
The S satellite will be briefly described.

The GPS satellite is equipped with a primitive frequency standard (primitive clock) and holds an accurate time called GPS time. The time is sent to the ground once every 30 seconds. The accuracy is that the propagation time of radio waves is measured with an accuracy of about 0.1 μs, and the clock of the user's receiver has been corrected to that accuracy.

GP is also used because it depends on GPS for mutual comparison of clocks, which is currently the national standard of each country in the world.
You can see the accuracy of S. From the above results, GPS 10 μs
It can be used to generate a synchronization signal with some degree of error.

GPS is a C / C used for consumer use.
Use A code. Since the time included in the C / A code is repeatedly transmitted every 30 seconds, the time is received every 30 seconds, and after measuring the time, the clock inside the GPS receiver is immediately corrected. The error of the sync signal after this correction is kept within 10 μs.

Each embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a radiotelephone control device according to an embodiment of the present invention.

In FIG. 1, blocks and the like having the same functions as those of the prior art shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. Here, 13 in FIG. 1 is a GPS satellite (not shown) to GP.
GPS means for receiving the S time, 14 is a time updating means for receiving the GPS time by the GPS means 13 for correction and generating a correct current time, 15 is the time taken by the time updating means 14 as a reference, It is a time and synchronization signal generating means for generating a time and synchronization signal.

Regarding the operation of the radiotelephone control device configured as described above, the GPS time information of FIG.
A sequence chart showing the operation until the time is updated according to the time information will be described.

First, the GPS means 13 acquires GPS time information once every 30 seconds and outputs the GPS time to the time updating means 14. The time updating means 14 takes in the GPS time output to the time updating means 14, corrects it to the current time, and controls it.
The time and the time of the synchronizing signal generating means 15 are updated once every 30 seconds via 12.

The current time of the radiotelephone control device A is updated as described above. Next, a sync signal is generated from the internal clock and the sync signal is sent to the radio control means 1 to perform radio communication with the portable radio handset. The operation in this case will be described.

FIG. 3 is a signal sequence chart showing an operation in the case of generating a sync signal, sending the sync signal to the radio control means, and performing radio communication with the portable radio handset B in accordance with the sent sync signal. The time / synchronization signal generating means 15 activates the wireless control means 1 through the control means 12 once every 20 msec. The interrupted wireless control unit 1 performs synchronous transmission / reception based on the synchronization signal received in the communication with the portable wireless slave device B.

As described above, in this embodiment, the accurate current time is obtained by the GPS means and the time updating means in the communication with the portable wireless handset in the wireless telephone control device, and the wireless telephone control device is based on the current time. As a reference of the time and synchronization signal generating means in step 1, the synchronization signal is obtained from the corrected time and synchronization signal generating means and is used as a synchronization signal for synchronous transmission / reception of radio transmission, thereby interfering channel interference and control signal and speech quality. In addition, in the radiotelephone control device, it becomes possible to reduce synchronization management between the radiotelephone control devices.

FIG. 4 is a block diagram showing the configuration of a radiotelephone control device according to another embodiment of the present invention. In FIG. 4, 6 is a time data transmitting means for transmitting the current time to the portable wireless handset B similar to that shown in FIG. In addition,
The other structure is the same as that of the embodiment of the present invention shown in FIG.

The operation of the radiotelephone control device configured as described above will be described. The generation of the synchronization signal has been described in the embodiment of FIG.

FIG. 5 is a signal sequence chart showing the operation when the present time is transmitted from the portable radio handset in the radio telephone control device of FIG. First, the portable wireless slave device B sends a time information request to the wireless control means 1. At this time,
Upon receiving the time information request, the wireless control means 1 issues a time information request to the time data sending means 6. Receiving the time information request, the time data transmitting means 6 operates as the time / sync signal generating means.
Sends a time information request to 15.

Upon receiving the time information request, the time / sync signal generating means 15 sends the time information to the time data sending means 6. Then, the time data sending means 6 receives the time information,
Time information is sent to the wireless control means 1. The wireless control means 1 receives the time information and sends the time information of the current time to the portable wireless slave device B.

As described above, according to another embodiment of the present invention, accurate time information is obtained by the GPS means and the time updating means in the time information transmission to the portable wireless handset in the wireless telephone control device, By transmitting the acquired time information in response to a request from the mobile wireless handset, it is possible to obtain accurate time information without any human judgment and reduce the clock management of the wireless telephone control device at the center. Becomes

[0026]

As described above, the radiotelephone control device of the present invention uses GPS means and time update means when radio synchronization is required between a plurality of radiotelephone control devices and when accurate current time is required. The clock information and the synchronization signal are made accurate by obtaining the accurate current time with the time reference of the clock circuit of the wireless telephone control device, and the synchronization signal management of the wireless telephone control device at the center. It is also possible to reduce clock management, and in the radiotelephone control device, it is possible to reduce the cost for synchronizing signal generation and the cost for changing clock data.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a wireless telephone control device according to an embodiment of the present invention.

FIG. 2 is a signal sequence chart showing an operation of obtaining GPS time information in FIG. 1 and updating the time to a time corresponding to the GPS time.

FIG. 3 is a sequence chart showing an operation in the case of generating a synchronization signal in FIG. 1, transmitting the synchronization signal to the wireless control means, and performing wireless communication with the portable wireless slave device in accordance with the transmitted synchronization signal.

FIG. 4 is a block diagram showing a configuration of a wireless telephone control device according to another embodiment of the present invention.

5 is a signal sequence chart showing transmission of time information to a child device of the wireless telephone control device in FIG.

FIG. 6 is a block diagram showing a configuration of a conventional radiotelephone control device.

FIG. 7 is a signal sequence chart showing a process of receiving a synchronization signal and performing wireless communication in FIG.

[Explanation of symbols]

1 ... Wireless control means, 2 ... Antenna, 6 ... Time data sending means, 7 ... Control data interface means, 8
... a line connecting the control data interface means 7 and the center C, 9 ... a station line interface means, 10 ... a line connecting the station line interface means 9 and the public network D,
11 ... Audio signal path switching means, 12 ... Control means, 13
... GPS means, 14 ... Time updating means, 15 ... Time and synchronization signal generating means, A ... Wireless telephone control device, B ... Portable wireless handset, C ... Center, D ... Public network.

Claims (2)

[Claims] 1. A radiotelephone control device for a digital mobile radiotelephone system, comprising: a radio control means for performing call control between the radiotelephone control device and the mobile radio handset; and the radiotelephone control device and the mobile radio handset. Antenna means for communicating, G
Time updating means for detecting bit information of PS time and updating the current time, time and synchronizing signal generating means for generating a synchronization signal based on the time updated by the time updating means, and operation control of each means A radiotelephone control device having control means for performing the following. 2. A time data sending means for sending time information, wherein when the time data sending request is received from the mobile wireless slave unit, the time data sending means sends the time data to the mobile wireless slave device via the wireless control means. The radiotelephone control device according to claim 1, wherein time data is transmitted.