JPS59104840A - Mobile radio communicating system - Google Patents

Abstract

PURPOSE:To simplify the entire system constitution and to reduce a calling time of a fixed station by selecting a base station by the registration of position of a mobile station in a disaster prevention and administrative radio system or the like. CONSTITUTION:When a specific mobile station of mobile stations 2-1-2-m makes a call, a present position registration code is transmitted to a control station 4 by the call via service area base stations 3-1-3-x, the content of a memory 11 is updated and base stations 3-1-3-x are selected by a base selecting section 13. The selection of terminal devices 1-1-1-n is attained at the mobile stations 2-1- 2-m after the end of the operations. On the other hand, in a call from the terminal devices 1-1-1-n, the call is detected by a counter terminal interface 9, the present position code of the mobile station selected by a moble station selecting button is retrieved from a memory 11 by a retrieving section 10, and the base stations 3-1-3-n are selected.

Description

Detailed Description of the Invention The present invention relates to a mobile radio communication system in which a large number of mobile stations and base stations share one frequency, and one mobile station cannot use two or more base stations at the same time. For example, there are mobile radio communication methods that can be used conveniently in wireless systems such as disaster prevention administrative radio systems, where there are many base stations within a wide service area, and radio waves are restricted from being emitted from many base stations at the same time due to radio wave regulations. related.

Conventionally, in this type of mobile radio communication system, line connection is made by comparing and switching the S/N of received radio waves. Therefore, in the case of a call originating from a mobile station, there is a drawback that the configuration of the base station and base control station for selecting the base station with the best 8/N of received radio waves is complicated. Another disadvantage of fixed-side calling is that it takes time to sequentially call the mobile station for each base station to investigate the mobile station, wait for a response, and compare the response radio waves with 87N.

An object of the present invention is to provide a mobile radio communication system in which the configuration of a base station and a base control station is simpler than the conventional system, and in which it does not take time to make a fixed-side call.

In order to achieve the above object, the mobile radio communication system according to the present invention allows a large number of mobile stations and base stations to share one frequency.
A mobile radio communication system in which one mobile station can use two or more base stations at the same time [b. Each mobile station has a means for setting its current position as a code and a means for communicating with the base station. The control station is equipped with a means for transmitting a current location registration code consisting of a current location code and an identification code of its own station when a response instruction is received from the control station, and the control station has a function to detect a call originating from a terminal. a terminal-to-terminal interface having a terminal, a memory for storing current location registration codes from each of the mobile stations so as to identify the corresponding base station via which the terminal has passed, and determining the current location of the mobile station selected by the terminal. a search unit that searches the memory; a base station selection unit that selects a base station according to the search results of the search unit; and a base station selection unit that selects a base station according to the search results of the search unit; Controlling the mobile station to transmit its own current location registration code, and updating the contents of the memory with the current location registration code transmitted when the mobile station makes a call or at the end of a call. , and an OPU that performs control such as switching to the next base station when the updated content exceeds a certain range.

According to the above configuration, the object of the present invention is completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a diagram showing the line configuration of mobile wireless 3-wire communication using the system of the present invention. Mobile stations 2-1 to 2-
This is an example applied to a -wave simplex press talk system in which the difference between the number of base stations 3-1 to 3-x controlled by the control station 4 and the number of base stations 3-1 to 3-x controlled by the control station 4 is relatively small. A plurality of terminals 1-1 to 1-n are connected to the control unit 4. Each mobile station 2-
1 to 2-m are equipped with means for setting the current position of their own station as a code. This setting means may be manual or may include a navigation system that can automatically set the current busy position code. In addition, according to instructions from the control station 4 through each base station, an identification code is added to the current position code of the own station obtained by the navigation system etc. when communicating with the base station, and sent as a current position registration code. have the means. When communicating with a base station, the current location registration code is sent when the mobile station makes a call and when a call ends. The control station 4 is the base station 3-1~
3-x and terminals 1-1 to 1-nK, the main control is to transmit the current location registration code of each mobile station to each mobile station 2-14- to 2-m. The first step is to send out a call, store it in memory, and search the memory for each station's call to select a base station.

FIG. 2 is a block diagram showing one embodiment of the control station 4. As shown in FIG. In the figure, it is a terminal-to-terminal interface connected to 9-digit terminals 1-1 to 1-n, and terminals 1-1 to 1-n.
- Equipped with a function to detect calls from n. Reference numeral 11 denotes a memory for storing an identification code and a current location code, and the current location registration code from each mobile station is stored in an area corresponding to the base station via which the mobile station passes. A memory 11 10 stores the mobile station selected by the terminal.
This is a search section for searching for. 13 base station 3-
A base selection unit connected to 1 to 3-X performs switching based on the search results.

Reference numeral 12 denotes O'PU, which is a control unit that controls each of the above-mentioned circuits.

FIG. 3 is a diagram showing an example of the external shape of the terminal.

Each of the terminals 1-1 to 1-n includes a manual base station selection section 8 in addition to the mobile station selection section 7.

Note that 5 is a handset and 6 speakers.

Next, the operation of the system of the present invention will be explained with reference to FIG. When a certain mobile station (for example, mobile station 2-1) makes a call, a base station (for example, base station 3-1) whose service area is the location of the mobile station 2-1 is called. The current location registration code is sent through the call, and the contents of the memory are updated. Therefore, the base station selection unit 13 selects the base station 3-
Select 1. Even if a radio wave is received by a base station other than the base station 3-1, if the base station 3-1 is registered for the mobile station 2-IK, the base station selection unit 13 selects the base station 3-1.
is selected. When the connection with the control station 4 via the base station 3-1 is completed, a message to that effect is displayed on the mobile station 2-1.

After the above operations are completed, the selection of terminals 1-1 to 1-n becomes possible in the mobile station 2-1 using the buttons on the controller, and the mobile station 2-1 pairs the target terminal with the control station 40. Connection is made via the terminal interface 9, thereby making it possible to make phone calls.

On the other hand, when a call is made from a terminal, the call is detected by the terminal-to-terminal interface 9, and the current location code of the target mobile station (for example, mobile station 2-n) selected with the mobile station selection button 7 is detected. The search unit IO searches for memo January 1. This search results in a certain base station (for example, base station 3-
n) is selected by the base selection unit 13, and communication with the mobile station 2-n becomes possible. In the above call, the mobile station transmits the current location registration code, which is the current location code prefixed with the identification code, at the end of the BreathTalk transmission.
The control station 4 updates the contents of the memo January 1 using its current location registration code, and if the mobile station moves during a call and the movement exceeds a certain range, it will be switched to the next adjacent base station. Become.

Regarding response instructions to each mobile station, if there is no call for a certain period of time, the control station 4 issues a response instruction to each base station 3-1 to 3-1 at predetermined time intervals.
This is carried out by a polling method in which mobile stations 2-1 to 2-m are sequentially activated and each mobile station 2-1 to 2-m is sequentially selected and called. The above series of controls 7- are automatically performed by the OPU 12yc.

As explained in detail above, the system of the present invention has a configuration in which a base station is selected by the location registration of a mobile station, and when S/N comparison switching is performed, fitn is sent to the base station and control station for S/N detection comparison control. Since no circuit is required, the overall system configuration is simpler than before. In addition, there is no room for switching chatter due to electric field instability in the interference region, which occurs in the conventional method. Furthermore, if necessary, it is possible to select the best 87N base by manually switching on the terminal, and the line quality does not deteriorate despite the simplification of equipment.

Since the system of the present invention has the above-mentioned features, it is extremely effective for disaster prevention administrative radio systems and the like that require efficient communication with a small number of mobile stations.

[Brief explanation of the drawing]

Fig. 1 is a line configuration diagram of a mobile radio communication system to which the present invention is applied, Fig. 2 is a diagram showing an embodiment of a base control station, and Fig. 3 is a diagram showing an example of a base control station.
The figure is an external view of the fixed terminal. 8-1-j to 1-n...Terminals 2-1 to 2-m...Mobile stations 3-1 to 3-x...Base station 4...Control station 5...Handset 6...Speaker 7...Mobile station selection unit 8...Manual base selection unit 9...Terminal interface 10...Search unit 11...Memory 12...O
PU 13...Base Selection Department Patent Applicant NEC Corporation Representative Patent Attorney Hisashi Inoro

Claims (1)

[Claims] In a mobile radio communication system in which many mobile stations and base stations share one frequency and one mobile station cannot use two or more base stations at the same time, each mobile station has to keep track of its current location. and means for transmitting a current location registration code obtained by adding an identification code of the own station to the current location code when communicating with a base station or when receiving a response instruction from a control station. The control station has a terminal-to-terminal interface having a function of detecting a call from a terminal, a memory for storing the current location registration code from each mobile station so as to identify the corresponding base station via which the control station has passed; a search unit that searches the memory to find the current location of the mobile station selected by the terminal; a base station selection unit that selects a base station according to the search result of the search unit; Control for each mobile station to transmit its own current location registration code at predetermined time intervals when there is no communication for more than a period of time, and when the mobile station makes a call or at the end of a call. A mobile radio communication system comprising: a CPU that updates the contents of the memory based on the current position code JiiJK and performs control such as switching to the next base station when the updated contents exceed a certain range.