JPH0657074B2 - Mobile wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for a mobile radio communication device in which a service area is constituted by a plurality of radio zones. In particular, it relates to a connection between a mobile radio and a fixed network.

[Conventional technology]

In the mobile wireless communication device, a service area is composed of a plurality of wireless zones, and wireless base stations are arranged in the respective wireless zones. To connect the mobile wireless device to another mobile wireless device or a general telephone via the fixed network, the mobile wireless device is connected to the nearest wireless base station via a wireless line.
The wireless base station is connected to the line control device via a wired line, and the line control device is connected to the fixed network.

The radio base station is assigned a base station number for identifying itself, and the mobile radio is assigned a mobile radio number for identifying itself. The circuit control device performs circuit switching between the wireless base station and the fixed network and manages the wireless base station closest to the mobile wireless device. That is, the line control device stores the base station number closest to each mobile radio device together with the mobile radio device number, and communicates with the mobile radio device via the radio base station.

[Problems to be solved by the invention]

However, in the conventional mobile wireless communication device, the wireless base station can set a wireless line to any mobile wireless device, but can set a wireless line to only one mobile wireless device at a time. That is, the line controller stores only one number of the wireless base station closest to each mobile wireless device. For this reason, when the mobile wireless device tries to set up a wireless line, if the wireless base station with the stored number has established a wireless line with another mobile wireless device, the new mobile wireless device will There was a drawback that the wireless line could not be established and the wireless base station had to wait until it became available.

An object of the present invention is to solve the above problems and to provide a mobile radio communication device with less call loss.

[Means for solving problems]

A mobile wireless device of the present invention includes a wireless base station arranged in each of a plurality of wireless zones that form a service area, a line control device that manages these wireless base stations, and a wireless circuit in one of these wireless base stations. In the mobile radio communication device provided with one or more mobile radio devices connectable with each other, the line control device corresponds to each mobile radio device and is a number of a plurality of radio base stations to which the mobile radio device can connect. Including a location information management table for storing, the mobile radio device includes a base station number storage memory that stores the numbers of a plurality of radio base stations to which the mobile radio device can connect, the line control device and the mobile radio device, When the wireless base station indicated by one number stored in the location information management table and the base station number memory cannot be used, the location information management table and the base Characterized in that it comprises a means for establishing a communication line via the other radio base station in the number memory number is stored.

[Action]

In the mobile radio communication device of the present invention, the line control device and the mobile radio store the numbers of a plurality of radio base stations around the mobile radio and establish a radio line with an appropriate radio base station among them. Even if one radio base station is used by another mobile radio device, the line between the line control device and the mobile radio device can be established by using the other radio base stations in the vicinity.

〔Example〕

FIG. 1 shows a block configuration diagram of a mobile radio communication apparatus according to an embodiment of the present invention.

The fixed network 1 is a public network or a premises network, to which a line control device 2 is connected via a wired line 5. A plurality of wireless base stations 3-1 to 3-m are connected to the line control device 2 via a wired circuit 6. Wireless base station 3-1
.About.3-m can be connected to any of the mobile wireless devices 4-1 to 4-n via the wireless line 7.

The line controller 2 exchanges lines between the wired lines 5 and 6 and wireless base stations 3-1 to 3-m closest to the mobile radios 4-1 to 4-n.
Can be managed. The wireless base stations 3-1 to 3-m can set the wireless line 7 with any of the mobile wireless devices 4-1 to 4-n, but only one mobile wireless device can be connected to the line control device 2 at a time. Can not. That is, the number of channels is one.

The features of this device are the line controller 2 and the mobile radio 4-
1 to 4-n memorize the numbers of a plurality of wireless base stations 3-k, 3-l, ... Surrounding the mobile wireless device 4-1 to 4-n, and an appropriate wireless base among them is stored. To establish a line via a station.

In the following description, the case of storing three base station numbers will be described as an example. First, the line control device 2 and the radio base stations 3-1 to 3-3
-m and mobile radios 4-1 to 4-n will be described.

FIG. 2 shows a block diagram of the line controller 2.

The matrix switch 21 is connected to the fixed network 1 via a plurality of station line interfaces 22, and the radio base station interface
Each wireless base station 3-1 to 3-m is connected via 23. Matrix switch 21 also has other RCU interfaces
24 and the dial signal transmission trunk 25 are connected. The matrix switch 21, office line interface 22, radio base station interface 23 and dial signal transmission trunk 25 are connected to a control unit 26. Furthermore, a program memory 27 and a position information management table 28 are connected to the control unit 26.

The matrix switch 21 performs circuit exchange between the wired line 5 connected to the fixed network 1 and the wired line 6 connected to the wireless base stations 3-1 to 3-m. The office line interface 22 detects an incoming signal (16 Hz) and opens / closes a DC loop with the fixed network 1. The radio base station interface 23 exchanges control signals with the radio base stations 3-1 to 3-m. Other RCU
The interface 24 is connected to another line control device. The dial signal transmission trunk 25 transmits a DTMF format dial signal to the fixed network 1. The control unit 26 exchanges control signals with the radio base stations 3-1 to 3-m and controls the opening and closing of the DC loop with respect to the fixed network 1 according to the program in the program memory 27. The position information management table 28 can store, for each mobile radio 4-1 to 4-n, the numbers of the three radio base stations in the vicinity thereof. When the mobile wireless device 4-i moves and approaches another wireless base station, position registration is performed, and the contents of the position information management table 28 are updated to the numbers of the three closest wireless base stations.

FIG. 3 is a block diagram of the radio base stations 3-1 to 3-m.

The voice line between these radio base stations 3-1 to 3-m and the line control device 2 is connected to a radio transmitter / receiver 33 via a line relay 31 for opening / closing the line and a two-wire / four-wire conversion circuit 32. It The wireless transceiver 33 includes two antennas 34 for transmitting and receiving. The control line between the radio base stations 3-1 to 3-m and the line control device 2 is connected to the control unit 36 via the control signal transceiver 35. However, in FIG. 3, the voice line and the control line are shown by the same line. The control unit 36 has a mobile unit number memory 3
7. A local number memory 38 and a program memory 39 are connected to control the line relay 31 and the wireless transceiver 33. The mobile unit number memory 37 is composed of a random access memory and stores the mobile unit number during call processing. Own number memory
The read-only memory 38 stores the base station number of its own station, which is assigned in advance. Program memory
A read-only memory 39 stores the control program.

FIG. 4 shows a block diagram of the mobile radios 4-1 to 4-n.

These mobile radios 4-1 to 4-n are provided with two antennas 41 for transmission and reception, and these antennas 41 are connected to a radio transceiver 42. The wireless transceiver 42 is a handset 43, a transmitter
44 and the control unit 45. The control unit 45 includes a machine number memory 46, a base station number memory 47, a program memory 48.
Is connected to control dial key 49, hook switch 4A and position registration button 4B. The own machine number memory 46 is composed of a read-only memory, and stores the own assigned mobile machine number. The base station number memory 47 is a random access memory and stores the numbers of the wireless base stations of the three wireless base stations 3-j, 3-k and 3-l around the mobile wireless device 4-i.

Next, the operation of this mobile radio communication device will be described.

FIG. 5 shows a control sequence for registering a base station number in the line controller 2 and the mobile radio 4-i.

When the user presses the position registration button 4B of the mobile wireless device 4-i, the control unit 45 of the mobile wireless device 4-i causes the mobile device number memory 4
The mobile station number of its own is read out from 6, and a manual position registration signal containing this information is generated and output from the antenna 41. The radio base stations 3-j, 3-k, 3-l, ...
Add level information at the time of reception to the manual position registration signal,
This is sent to the line controller 2. The line controller 2
The radio base station 3-j that compares the level information of the manual position registration signals received from the same mobile radio 4-i received within a certain period of time , 3-k, 3-l base station numbers are written in the position information management table 28. After that, the line control device 2 returns a manual position registration completion signal to the mobile radio 4-i via the radio base station 3-j having the highest reception level. The manual position registration completion signal includes the base station number written in the position information management table 28. When the mobile radio 4-i receives the manual position registration completion signal, it extracts three base station numbers from the contents and writes them in the base station number memory 47.

FIG. 6 shows a control sequence for making a call connection from the mobile radio 4-i.

The control unit 45 of the mobile wireless device 4-i reads the mobile device number of its own from the own device number memory 46 by the interruption from the hook switch 4A by the off-hook scanning of the user, and the other wireless base station from the base station number memory 47. One station number is read out, and a calling signal including these numbers is transmitted. It is assumed that the base station number at this time indicates the wireless base station 3-j.

When radio base station 3-j is available, this radio base station 3
-j, after establishing a wireless line with the mobile wireless device 4-i, sends a calling signal including the mobile device number and the base station number to the line control device 2. When the line control device 2 receives the calling signal from the wireless base station 3-j, the line control device 5 connects to the fixed network 1 through the wired line 5.
While closing the DC loop of the mobile wireless device 4-i, a call response signal including the mobile device number of the mobile wireless device 4-i and the base station number of the wireless base station 3-j is sent via the wireless base station 3-j. send to i.

When the wireless base station 3-j cannot be used, that is, when the call response signal cannot be received from the wireless base station 3-j within a fixed time, one of the other base station numbers is read from the base station number memory 47. , And sends a calling signal including the mobile station number of itself and the newly selected base station number, and repeats the above operation using the radio base station 3-k instead of the radio base station 3-j.

When the radio base station 3-k cannot be used, another base station number is read out and the above-described operation is repeated using the radio base station.

In the following, as shown in FIG. 6, the second radio base station 3-
A case where k establishes the wireless line 7 with the mobile wireless device 4-i will be described as an example.

When the mobile radio 4-i receives the call response signal, it opens the communication line and supplies the dial tone sent by the exchange of the fixed network 1 to the handset 43. When the user presses the dial button after confirming the dial tone, the control unit 45 detects this and sends a dial signal including dial information to the line control device 2 via the radio base station 3-k. Upon receiving this dial signal, the line control device 2 sends a dial signal corresponding to the line type of the wired line 5 to the fixed network 1 to the fixed network 1.

When the user performs an on-hook operation after shifting to the call by the above processing, the control unit 45 detects this and the wireless base station
An end signal is sent to the line controller 2 via 3-k. When the line control device 2 receives this end signal, the fixed network 1
The direct current loop of the wired line 5 between and is opened, and the call processing ends.

FIG. 7 shows a control sequence when an incoming call is connected to the mobile radio 4-i.

When an incoming call signal from the exchange of the fixed network 1, that is, a signal of 16 Hz arrives at the wired line 5 with the fixed network 1, the station line interface 22 of the line control device 2 detects this signal and the control unit 26 Request an interrupt. By this interrupt, the control unit 26 reads from the position information management table 28 one of the three base station numbers related to the mobile wireless device 4-i corresponding to the wired line 5, for example, the number of the wireless base station 3-j, and the mobile device The incoming call signal including the number and the base station number is transmitted to the mobile radio 4-i via the radio base station 3-j. Upon receiving the incoming call signal, the mobile wireless device 4-i establishes the wireless line 7 with the wireless base station 3-j and then controls the incoming call response signal via the wireless base station 3-j. Send to device 2.

If the line control device 2 cannot receive the incoming call response signal from the mobile wireless device 4-i within a fixed time, another base station number from the position information management table 28, for example, the wireless base station 3-.
The k number is read, an incoming call signal including this number is generated, and the mobile radio 4 is transmitted via the newly selected radio base station 3-k.
-Send to i. When the mobile wireless device 4-i receives the incoming call signal, after establishing the wireless line 7 with the wireless base station 3-k,
An incoming call response signal is sent to the line control device 2 via the radio base station 3-k.

If the line control device 2 cannot receive the incoming call response signal from the mobile radio 4-i even if the radio base station 3-k is used, another base station number is read out and the radio base station To repeat the above operation.

In the following, as shown in FIG. 7, the second radio base station 3-
A case where the wireless line 7 is established with the mobile wireless device 4-i by k will be described as an example.

Upon receiving the incoming call response signal, the line control device 2 sends a bell ringing signal to the mobile radio 4-i via the radio base station 3-k. When the mobile radio 4-i receives the bell ringing signal,
Generate a ringing tone. When the user performs an off-hook operation, the control unit 45 detects this and sends an off-hook signal to the line control device 2 via the radio base station 3-k. Upon receiving this off-hook signal, the line control device 2 connects the wired line 5 and the wired line 6-k by the matrix switch 21 to close the DC loop, and the wireless base station 3-k closes the line relay to set the call path. Is opened.

When the user performs an on-hook operation after shifting to the call by the above processing, the control unit 45 detects this and the wireless base station
An end signal is sent to the line controller 2 via 3-k. When the line control device 2 receives this end signal, the fixed network 1
The direct current loop of the wired line 5 between and is opened, and the call processing ends.

〔The invention's effect〕

As described above, the mobile radio communication device of the present invention can establish a line between the mobile radio device and the line control device by using any of a plurality of radio base stations around the mobile radio device. . Therefore, compared to the case where there is only one wireless base station that can establish a wireless channel, there is an effect that call loss caused by the wireless base station being used by another mobile wireless device can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a mobile radio communication device according to an embodiment of the present invention. FIG. 2 is a block diagram of the line controller. FIG. 3 is a block diagram of a wireless base station. FIG. 4 is a block diagram of the mobile wireless device. FIG. 5 is a diagram showing a control sequence for registering a base station number in the line control device and the mobile radio device. FIG. 6 is a diagram showing a control sequence of call connection from a mobile radio device. FIG. 7 is a diagram showing a control sequence of an incoming call connection to a mobile wireless device. 1 ... Fixed network, 2 ... Line control device, 3-1 to 3-m ... Wireless base station, 4-1 to 4-n ... Mobile wireless device, 5 ... Wired line, 6 ... Wired line, 7 ... Wireless line, 21 ... Matrix switch, 22 ... Station line interface, 23 ... Wireless base station interface, 24 ...
Other RCU interface, 25 ... Dial signal transmission trunk, 26 ... Control unit, 27 ... Program memory, 28 ... Position information management table, 31 ... Line relay, 32 ... Two-wire / four-wire exchange circuit, 33 ... Wireless transceiver, 34 ... antenna, 35 ... control signal transceiver, 36 ... control section, 37 ... mobile unit number memory, 38 ... own station number memory, 39 ... program memory, 41 ... antenna, 42
... wireless transceiver, 43 ... receiver, 44 ... transmitter, 45 ... control unit, 46 ... own number memory, 47 ... base station number memory, 48 ...
Program memory, 49 ... Dial keys, 4A ... Hook switch, 4B ... Position registration button.

Claims (1)

[Claims] 1. A radio base station arranged in each of a plurality of radio zones constituting a service area, a line control device for managing these radio base stations, and a radio line connectable to one of these radio base stations. Na 1
In the mobile radio communication device including the above mobile radio device, the line control device stores the position information for storing the numbers of a plurality of radio base stations to which the mobile radio device can connect, corresponding to each mobile radio device. A management table; the mobile wireless device includes a base station number storage memory that stores the numbers of a plurality of wireless base stations to which the mobile wireless device can connect; the line control device and the mobile wireless device include the location information management table. And when the radio base station indicated by one number stored in the base station number memory cannot be used, the radio base indicated by the other number stored in the position information management table and the base station number memory A mobile radio communication device comprising means for opening a communication line via a station.