JPH0352340A - Mobile object communication system - Google Patents

Abstract

PURPOSE:To increase the traffic carried at every unit radio frequency by adding a means deciding communication service, a means transmitting/receiving the distinction of simplex or duplex communication between a mobile station and an exchange station and a means selecting simplex or duplex communication during the connection of communication channel automatically. CONSTITUTION:In the case of a call from a mobile station 4, whether a call from a data terminal equipment 6 or a call from a handset 5 is decided automatically in the mobile station 4 and an identification signal for simplex or duplex communication request is set to an incoming radio control line 11. When the mobile station 4 originates a call to a mobile station 7, a simplex communication request and a telephone number of the mobile station 7 are set to the incoming radio control line 11 and they are sent to a radio base station 3 from the mobile station 4. The frequency is tuned to outgoing communication channel 12 and an incoming communication channel 13 used for the simplex communication with the information of the outgoing radio control line 10 to be received and two frequencies are used between the handsets 5 and 8 to apply simplex communication. Thus, the traffic carried at every radio frequency is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile communication system, and more particularly to a mobile communication system that selectively uses a call mode of a call line.

[Conventional technology]

In conventional mobile communication systems, the call mode was fixed to duplex call, and connections were made between mobile stations and wireless base stations, and between wireless base stations and general public networks. [Problems to be Solved by the Invention] In the above-mentioned conventional mobile communication system, all communications are duplex calls, so the call usage rate per radio frequency of the wireless communication line during a call inevitably decreases. The problem is that the amount of traffic that can be carried by each radio frequency becomes less than 50%. [Means for Solving the Problems] The mobile communication system of the present invention uses multiple mobile stations, one wireless base station, one exchange, multiple wireless control lines, and multiple call lines. In a large zone type mobile communication system, determining means automatically determines duplex or simplex mode to the plurality of mobile stations, and instructs duplex or simplex mode between the plurality of mobile stations and the exchange. This is an elliptical precept that provides means for transmitting and receiving instruction information and means for allocating duplex and simplex communication frequencies to the exchange. [Example] Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention.

1 is a general telephone public network, 2 is an exchange, 3 is a wireless base station, 4
and 7 are mobile stations, 5 and 8 are handsets, 6 and 9 are data terminals, 10 is a downlink radio control line, 11 is an uplink radio control line, 12 is a downlink communication line, l3 is an uplink communication line, 14
and 15 are downlink communication lines to the mobile stations 4 and 7, and 16 and 17 are uplink communication lines from the mobile stations 4 and 7.

Next, the operation will be explained.

When making a call from the mobile station to the mobile station 7, a simple call request and the telephone number of the mobile station 7 are set on the uplink radio control line 11, and the mobile station 4 sends the call to the radio base station 3. The exchange 2 receives information on the uplink radio control line 11 from the radio base station 3 and starts a call connection as a simplex call. The exchange 2 sends simplex call instruction information, the number of the mobile station 7 receiving the call, and the downlink call line 1 on the downlink radio control line 10 via the radio base station 3.
The frequency number of 2 and the number of the uplink communication line 13 are set and transmitted to the mobile station and 7. The mobile stations 4 and 7 tune the frequency to the downlink communication line 12 and uplink communication line 13 used for simplex communication based on the received information on the downlink radio control line 10, and perform communication between the handset 5 and the handset 8. Simplex calls are made using two frequencies.

When making a call from the data terminal 6 of the mobile station 4 to the data terminal 9 of the mobile station 7, a duplex call request and the telephone number of the mobile station 7 are set on the uplink radio control line 11, and the call is made from the mobile station 4 to the radio base station 3. Send. The exchange 2 receives information on the uplink radio control line 11 from the radio base station 3 and starts a call connection as a duplex call.

The exchange 2 transmits duplex call instruction information, the number of the incoming mobile station 7, and the downlink call line 14 and uplink call line 16 to the originating mobile station 4 on the downlink radio control line 10 via the radio base station 3. and the frequency numbers of the downlink communication line 15 and uplink communication line 17 for the receiving mobile station 7 are set and transmitted to the mobile stations 4 and 7. Based on the received information on the downlink radio control line 10, the mobile station 4 tunes the frequency to the downlink communication line 14 and uplink communication line 16 used for repeated calls. Based on the received information on the downlink radio control line 10, the mobile unit 7 tunes the frequency to the downlink communication line 15 and uplink communication line 17 used for duplex calls. Thereafter, duplex calls are made between the data terminal 6 of the mobile station 4 and the data terminal 9 of the mobile station 7 using four frequencies.

When a user of this system makes a call from the mobile station 4, the mobile station 4 automatically determines whether the call is from the data terminal 6 or the handset 5, and sends a simple call to the uplink radio control line 11. Set the identification signal for a call request or duplex call request. The data format of the identification signal in this case will be explained. FIG. 2 is a data format diagram of the uplink radio control line 11 and the downlink radio control line 12 in one embodiment of the present invention. 18 and 25 are bit synchronization patterns, 19 and 26 are word period patterns, 20 and 27 are messages, 21 and 28 are parity pits, 22 is the originating mobile station number, 23
is the incoming dialed number, 24 and 35 are simple/duplex distinguishing bits, 29 is the originating mobile station number, 30 is the terminating mobile station number,
3l is the frequency number of the downlink communication line 14 of the originating mobile station 4;
32 is the frequency number of the uplink communication line 16 of the originating mobile station 4;
33 is the frequency number of the downlink communication line 15 of the receiving mobile station 7;
34 is the frequency number of the downlink communication line 17 of the receiving mobile station.

〔Effect of the invention〕

As explained above, the present invention provides a means for determining a communication service, a means for transmitting and receiving a distinction between a simplex call and a duplex call between a mobile station and a switching center, and a means for distinguishing between a simplex call and a duplex call. By adding a means for automatically selecting a telephone line during connection, the line structure can be selected depending on the type of communication service to be used, and the traffic that can be carried per unit radio frequency can be increased.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
2(a) is a data format diagram of an uplink radio control line, and FIG. 2(b) is a data format diagram of a downlink radio control line. DESCRIPTION OF SYMBOLS 1... General telephone switching network, 2... Exchange, 3... Wireless base station, 4, 7... Mobile station, 5.8... Handset, 6, 9... Data terminal, 10... Downlink radio control line, 11... Uplink radio control line, 12... Simple downlink communication line, 13... Simple downlink communication line, 14.1
5... Duplex downlink communication line, 16.17... Duplex uplink communication line, 24.25... Simplex/duplex discrimination bit.

Claims (1)

[Claims] In a large zone mobile communication system consisting of a plurality of mobile stations, one radio base station, one exchange, a plurality of radio control lines, and a plurality of call lines, the plurality of mobile stations determining means for automatically determining duplex and simplex modes; means for transmitting and receiving instruction information for instructing duplex or simplex modes to and from the exchange; A mobile communication system characterized by comprising: means for allocating.