JPS60136436A - Radiotelephone system - Google Patents

Abstract

PURPOSE:To cope with plural mobile radiotelephone sets with one fixed radiotelephone device by giving codes indicating priority orders different from one another to plural mobile radiotelephone sets and connecting them to a subscriber's line in time division in accordance with priority order. CONSTITUTION:Priority orders are set to plural mobile radiotelephone sets T1- TN, and inherent identification codes are given to them for the purpose of distinguishing them from one another. Plural telephone sets are linked to one fixed radiotelephone device 7 by radio lines and are connected to an exchange through a subscriber's line 1. When the fixed ratiotelephone device 7 receives a terminating call signal from the exchange, a controller in the device 7 selects the telephone set T1 having the highest priority order (a higher priority order is given according as the subscript value is smaller) and transmits its identifications code. When receiving this signal, the telephone set T1 transmits a response signal, and the telephone set T1 and the device 7 switch channels to enter into the service state. Next, the device 7 performs the similar operation for the telephone set T2 and performs operations successively for telephone sets up to the telephone set TN in time division.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a system in which a radio telephone device having a plurality of mobile radio telephones is connected to one fixed radio telephone device.

(Prior Art) Conventionally, there has been a one-to-one correspondence between a fixed wireless telephone device (connection device) and a mobile wireless telephone in a cordless telephone device. For example, FIG. 1 is a diagram illustrating a connection method of a wireless telephone device using a conventional cordless telephone device when there are a plurality of mobile radio telephones. In this method, fixed wireless telephone devices and mobile wireless telephones have a one-to-one correspondence, so as many fixed wireless telephone devices as there are mobile wireless telephones are required, which is uneconomical in terms of cost and space. . In other words, according to the user's request, 2
When installing more than one mobile wireless phone, fixed wireless telephone equipment is required for the number of phones, which is not a good idea in terms of efficient use of radio waves, and the disadvantage is that it is a very uneconomical configuration. was there.

(Object of the Invention) The object of the present invention is to provide a fixed wireless telephone device connected to a subscriber line of an exchange when two or more mobile radio telephones are to be connected through a wireless line.
The above-mentioned drawbacks are eliminated by giving priority to each mobile radio telephone and forming and transmitting control signals for incoming calls in a time-sharing manner. An object of the present invention is to provide a radio telephone device configured so that it can be handled by mobile radio telephones.

(Configuration of the Invention) A wireless telephone system according to the present invention is configured to include a wireless telephone device, a fixed wireless device, and a subscriber line of an exchange.

The radiotelephone device includes a plurality of mobile radiotelephones each having a different ID code with a different priority, and is intended to accomplish communication according to the priority of the ID codes.

The fixed wireless device is connected to the wireless telephone device so as to achieve communication, and when a call is received, the mobile wireless telephone device having the ID code with the highest priority transmits control signals in a time-sharing manner. It is for.

The subscriber line of the exchange is for connecting between mobile radio telephone equipment and fixed radio telephone equipment.

(Example) Next, the present invention will be described in detail with reference to the drawings.

FIG. 2 1d is a schematic diagram showing an embodiment of a cordless wireless telephone device according to the present invention. Here, Tr + T
2+...TN is a mobile radio device, and each telephone has a priority order, and the smaller the subscript number, the higher the priority order. Additionally, each mobile radio telephone has an ID code to distinguish it from other mobile radio telephones. First, the calling operation will be explained. At this time, it is similar to the case where a conventional fixed wireless telephone device and a mobile wireless type packing machine correspond one-on-one, and a connection operation is performed between the off-line telephone and the fixed wireless telephone device.

Next, a description will be given assuming that the call receiving operation is performed using a multi-channel access method. When the fixed wireless telephone equipment receives the 16H2 signal from the exchange, it transmits the corresponding I to the telephone T1 with the highest priority on the control channel.
An incoming call signal containing the D code and communication channel information is sent out. Figure 3 (A) shows the time chart of incoming call operation.
, shown in (B). When the telephone T1 receives the incoming call signal, it sends out an incoming call response signal, and both the telephone TI and the connecting device perform channel switching. So, the phone T!
sends a channel switching completion signal.

When the fixed wireless telephone device receives the channel switching completion signal, it returns to the control channel and sends an incoming call signal containing the corresponding ID code and the above communication channel information to the telephone T2 with the second highest priority. . In this way, the telephone TNt performs the same operation as described above.

In the above connection operation, control signals are sent in a time-division manner to avoid interference between mobile radio telephones, so the mobile radio telephones must turn off the transmission @ except when transmitting each control signal. It is necessary to keep it.

If an incoming call signal is not received from the telephone Ti (1≦i≦m, iH positive integer), the channel is not switched and the operation moves to the incoming call operation to the telephone Ti+1.

After channel switching has been completed up to the telephone TN, the fixed wireless device sends out a bell drive signal on said channel. Thereafter, all the mobile radio telephones T1 to T8 go off-hook, and when an off-hook signal is sent out, the fixed radio telephone equipment turns on the line and enters the talking state.

In the above, the operation has been explained using the multi-channel access method, but it goes without saying that the present invention can be applied to methods other than the multi-channel access method.

(Effects of the Invention) As explained above, in the present invention, when two or more mobile radio telephones 75i are to be connected through a radio line to a fixed radio telephone device connected to a subscriber line of an exchange, When connecting mobile radio telephones, priority is given to mobile radio telephones, and control signals for incoming calls are transmitted in a time-division manner. This has the effect of making it possible to use a telephone.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an example of a prior art line system having a plurality of mobile radios for the same subscriber line. FIG. 2 is a diagram showing an embodiment of the communication system of the cordless wireless telephone device according to the present invention. FIG. 3 is a diagram showing an example of a time chart of a call receiving operation in a cordless wireless telephone device having the method shown in FIG. 2 according to the present invention. 1...Subscriber line 2, Φ, rosette 3.4.7...Fixed wireless telephone device 5.6. TI-TN: Mobile radio telephone device having a mobile radio telephone Patent applicant: NEC Corporation Representative, Patent attorney: Hisashi Inoro

Claims (1)

[Claims] A radiotelephone device having a plurality of mobile radiotelephones having different ID codes each having a different priority, and for achieving communication according to the priority of the ID codes; a fixed radio telephone device for transmitting control signals in a time-sharing manner sequentially from the mobile radio telephone device which is connected to achieve communication with the mobile radio telephone device and which has the ID code having the highest priority when a call is received; 1. A wireless telephone system comprising a subscriber line of an exchange for connecting the fixed wireless telephone device and the fixed wireless telephone device.