JPH06269043A - Radio network interconnection method - Google Patents

Abstract

PURPOSE:To make call transmission and reception even to a terminal equipment of a public network even when a mobile terminal equipment of a public network subscriber moves to an enterprise office without application of revision to a public network. CONSTITUTION:When a public mobile terminal equipment 102 sends a message to an enterprise base station 1077, a radio controller 110 connecting to a PBX 111 sends the same message as that sent by a public mobile terminal equipment 102 to a public base station 106. Moreover, when a radio controller 110 receives a message from a public subscriber exchange 401 via a public base station 106, the radio controller 110 informs the content to the enterprise base station 107 via the PBX 111 and the enterprise base station 107 sends the same message as the message received by the radio controller 110 to the public mobile terminal equipment 102.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method of a wireless mobile terminal capable of communicating at any place, and particularly when a public mobile terminal moves into the place of business It relates to a method of enabling incoming and outgoing calls.

[0002]

2. Description of the Related Art In a conventional wire telephone communication network, a public telephone is installed in a business establishment to provide a communication service to the public network to arbitrary users.

[0003]

In the conventional wire telephone communication, a mobile communication network similar to the method of installing a public telephone in an office to provide a communication service to the public network for arbitrary users. There is a method to install a public base station in the office. However, in order to enable transmission from any location in the business site by public mobile terminals, it is necessary to install multiple public base stations in the business site so that the wireless area of the public base station covers the business site. Good bye. An object of the present invention is to realize a method that enables a public mobile terminal to make and receive a call from an arbitrary place in a business establishment without installing a plurality of public base stations in the same business establishment.

[0004]

In order to achieve the above object, according to the present invention, a public means is connected by a wireless means which is connected to a PBX in a business office by an electric communication line and is the same as a wireless communication means of a public mobile terminal. A radio controller for communicating with the base station for use is provided. In addition, the PBX, the local base station connected to the PBX, and the radio controller are connected to public mobile terminals.
Provide a relay function for communication between public base stations.

[0005]

The private base station, the PBX and the radio control device relay the communication between the public mobile terminal and the public base station in the office while keeping the transparency of the communication information. It is possible to make a call to a public base station installed only in the office via the PBX network. Further, if the location registration is performed from the public mobile terminal by the relay function, the location is registered in the public base station, and the incoming call from the public network to the public mobile terminal can be performed by the wireless control device and the PBX without changing the public network. Can be done through. Also, the public network can charge the public mobile terminal directly.

[0006]

FIG. 1 is an explanatory diagram of a mobile communication system to which the present invention is applied. The system is roughly composed of mobile terminals (hereinafter referred to as PS) 101 to 103, base stations (hereinafter referred to as CS) 104 to 108, wired terminals 109, PBX 111,
It is composed of a public network 112 and a wireless control device 110. P
The S has a home PS 101, a public PS 102, and a business PS 103. The CS has a home CS 104, public CSs 105 and 106, and business offices 107 and 108.

Each PS and each CS are connected by a unified wireless communication interface 117. The wired terminal 109, home and public CSs 104 to 106 and PBX 111 are connected to the public network 112, and business CSs 107 and 108 are connected to P.
BX111 has telecommunications circuit means 119 to 123, respectively.
Connected by. The public CS 106 is located in the office 116, and the wireless control device 110 of the present invention is located in the wireless coverage area. The wireless controller 110 uses the wireless communication interface 117 to connect to the public CS1.
06, and is further connected to the PBX 111 by the telecommunication line means 124.

The protocol used in the wireless communication interface 117 adopts, for example, the second generation cordless telephone system standard by the Radio Wave System Development Center (hereinafter referred to as RCR). Telecommunications line means 119
The interface as ~ 124 is, for example, CCIT.
The ISDN interface standard by T is adopted, but a conventional analog subscriber line interface may be used.
Home wired terminal 109, home CS104, PBX11
1 is the subscriber telephone number DN1 of the public network 112.
(113), DN2 (114), and DN3 (115) are allocated.

By carrying out the present invention, for example, household and public PS1s that have moved into the office 116
01 and 102 do not use the public line 122 of the PBX, the CS 107 or 108 for the business office, the PBX 1
11, it becomes possible to connect to the public network 112 via the wireless control device 110 and the public CS 106 to communicate with the terminal 109 of the public network.

FIG. 2 is a diagram showing an example of the configuration of the PBX 111. In FIG. 2, the PBX111 is a switch (SW) 2
01, radio interface circuit (RIF) 202, subscriber interface circuit (LIF) 203, outgoing / incoming line trunk (OGT-ICT) 204, talkie trunk (TKT) 205, PS interface circuit (PIF) 2
06, a CPU 207, a memory (MEM) 208, and a communication control unit (IOC) 210.

A PS 214 is connected to the RIF 202 through a business CS 107 and a wireless communication interface 117. A telephone 213 is connected to the LIF 203, for example. The OGT / ICT 204 is a trunk for performing communication across the exchanges via the public network 112. The TKT 205 is a trunk for transmitting various voice guidance. The public CS 106 of the public network 112 is connected to the PIF 206 via the wireless control device 110 and the wireless communication interface 117. CPU207 is PBX11
This is a processor that performs control of 1. The MEM 208 is a storage device that stores programs and data, and may be a semiconductor memory or a magnetic memory.

In mobile communication, the MEM 208 has a position management table 2 for managing the position of the PS 214.
09 is also stored. The IOC 210 has a communication line 2
A computer 211 is connected via 15, and the computer 211 has a database 212 that stores data necessary for each application.

FIG. 3 shows an example of the configuration of the radio controller 110. In FIG. 3, the wireless controller 110 is a demultiplexer 301, a memory 302, a CPU 303, and a wireless controller 30.
4, consisting of an antenna 305. The PBX 111 is connected via the telecommunication line 124 in the demultiplexer 301.
The signal transmitted from the PBX 111 to the radio controller 110 is first a control signal (D channel) in the demultiplexer 301.
Are separated into communication information (B channel), the communication information is output to the wireless control unit 304, and the control signal is output to the CPU 303.

The radio control unit 304 converts the communication information into a signal system suitable for the radio communication interface 117, and transmits it from the antenna 305 to the public CS 106. CPU303
Controls the wireless control unit 304 based on the control signal. On the contrary, the signal transmitted from the public CS 106 to the wireless control device 110 is input to the wireless control unit 304 from the antenna 305, and separated by the wireless control unit 304 into communication information (B channel) and control signal (D channel). It

The communication information is output to the demultiplexer 301 and the control signal is output to the CPU 303.

The CPU 303 generates a control signal for the telecommunication line 124 based on the input control signal and outputs it to the demultiplexer 301. The demultiplexing device 301 multiplexes the communication information and the control signal and transmits the multiplexed information to the PBX 111.
The memory 302 is a storage device that stores programs and data.

FIG. 4 shows a PS stored in the MEM 208 in the PBX 111 or the public subscriber exchange in the public network 112.
An example of the configuration of the location management table 209 is shown. The location management table 209 has a PS number 1502 and location information 150.
3, PS block status 1504. Location information 150
Reference numeral 3 indicates an area where the PS is registered in the office 116 or the public network 112. This information is PBX
111 or a public subscriber exchange is used when calling the PS, and in this example, the CS number is used.

FIG. 5 is an example of a sequence for performing location registration when the public PS 102 moves into the office 116 in the mobile communication system shown in FIG.

The public CS 10 located in the office 116
When the public PS 102 outside the wireless coverage area of 6 transmits the location registration request message to the PBX 111 via the business CS 107, the PBX 111 sends the PS 102 of the transmission source to the PS of the subscriber of the PBX 111 in step 402.
If it is not the subscriber's PS, step 4
Go to 03. In step 403, it is determined whether the public PS 102 has been registered in the location management table 209 in the PBX 111 for the first time whether the public PS 102 has moved to the office 116 and is first registered. As a result, if the location is not registered in the location management table 209, the location registration is performed for the first time. In that case, a location registration request message is transmitted to the wireless control device 110.

Upon receiving the location registration request message from the PBX 111, the radio controller 110 converts the location registration request message on the ISDN interface on the telecommunication line 124 into a location registration request message on the radio communication interface 117 and public CS 106. Send to. Upon receiving the location registration request message of the public PS 102 via the public CS 106, the public subscriber exchange 401 receives the public C
An authentication request message is transmitted to the public PS 102 via S106, the wireless control device 110, the PBX 111, and the business CS 107.

When the public PS 102 receives the authentication request message, the public PS 102 sends an authentication response message to the business CS1.
07, PBX111, wireless controller 110, public CS10
6 to the public subscriber exchange 401. Upon receiving the authentication response message, the public subscriber exchange 401 performs authentication processing of the public PS 102 based on the information in the message in step 404, and if the determination result is correct, the public subscriber exchange 401 acquires the position information of the public PS 102. The location management table 209 in the public subscriber exchange 401 is updated as if it is within the wireless area of the public CS 106, and a location registration acceptance message is transmitted to the PBX 111 via the public CS 106 and the wireless control device 110.

The PBX 111 registers the position information in the public PS 102 and its place of business 116 in the position management table 209. Furthermore, PBX111 is CS10 for business
The location registration acceptance message is transmitted to the public PS 102 via 7 and the location registration operation ends.

As a result of step 403, if the PS 102 has already been registered in the location management table 209 of the PBX 111, the location registration is the second or subsequent location registration. Therefore, the PBX 111 sends a location registration request message to the public subscriber exchange 401 via the radio controller 110. The location management table 209 in the PBX 111 is updated to transmit the location registration acceptance message to the public PS 102, and the operation ends.

As a result of step 402, the location management table 2 in the PBX 111 even if the subscriber is the PS of the PBX 111.
09 is updated, a location registration acceptance message is transmitted to the PS of the location registration request source, and the operation ends.

If the authentication result is incorrect in step 404, the public subscriber exchange 401 sends a location registration refusal message to the public CS 106, the wireless control device 110, and the PBX 11.
1. Transmit to the public PS 102 via the business CS 107, and the operation ends.

According to the above method, if the public PS 102 is within the radio coverage of any of the business offices CS, the radio control device 1 in the public network can be located anywhere in the business office 116.
The public CS 106 adjacent to 10 can be registered in the position management table 209 as position information.

FIGS. 6 and 7 are message formats used when the public PS 102 performs location registration in the example of the location registration sequence shown in FIG.

FIG. 6 shows the format of the location registration request message in the second generation cordless telephone system standard issued by RCR used in the wireless communication interface 117.

The PS number 1602 is the PS number of the PS requesting location registration. In FIG. 5, public PS
When the 102 transmits the location registration request message to the business CS 107, the PS number 1602 in the location registration request message 1601 shown in FIG.
Set and use the S number. In addition, the wireless control device 110
When transmitting a location registration request message from the public PS 106 to the public CS 106, the same message as the location registration message 1601 used between the public PS 102 and the business CS 107 is used.

FIG. 7 shows the telecommunication lines 121, 122, 1
23 shows a format of a call setup message on the ISDN interface used by the H.23 and H124. Wireless communication interface
The location registration request message 1601 in 117 is the IS
It is expressed using the call setup message 1401 in the DN interface. In this case, a code indicating location registration is set in the facility 1402. The calling number 1403 is the PS number 1602 of the location registration request message 1601.
The same information as is set. In FIG. 5, public PS
The location registration request message 1601 transmitted from 102 to the business CS 107 is converted into a call setting message 1401 in the business CS 107 and transmitted to the wireless control device 110 via the PBX 111.

8, 9, and 10 show public PS 102.
8 and 9 are message formats used in the authentication of the wireless communication interface 117, and FIG. 10 is a telecommunications line 121, 122, 12
The message format in 3,124 is shown. Authentication is performed to determine whether the PS requesting location registration and call origination is valid. The method is, for example, converting a random number generated by an exchange into an encryption with an encryption key that should be common to each of the exchange and PS, and by matching it, P
The encryption key of S is shown to be correct, and the method of certifying the validity of PS is used.

FIG. 8 shows the format of an authentication request message in the second-generation cordless telephone system standard issued by RCR. In FIG. 5, when an authentication request message is transmitted from the public subscriber exchange 401 to the public CS 106, the public CS 106 sets the random number included in the received message as the authentication random number 1802 in the authentication request message 1801. Then, the data is transmitted to the wireless control device 110. Further, when an authentication request message is transmitted from the wireless control device 110 to the business site CS 107 via the PBX 111, the business site CS 107 becomes the public CS 106-wireless control device 1
The same message as the authentication request message 1801 used between 10 is transmitted to the public PS 102.

FIG. 9 shows the format of the authentication response message in the second-generation cordless telephone system standard issued by RCR. In FIG. 5, when the public PS 102 receives the authentication request message 1801, the random number in the message is encrypted, and the result is the authentication response message 19
Set in the authentication calculation result 1902 in 01, C for business
It transmits to S107. In addition, CS107 to P for business
When an authentication response message is transmitted to the wireless control device 110 via the BX 111, the wireless control device 110 sends a public P
S102-The same message as the authentication response message 1901 used by the business CS 107 is sent to the public CS 106.
Send to.

FIG. 10 shows the format of the INFO message on the ISDN interface for transmitting the authentication request message and the authentication response message on the wireless communication interface in the telecommunication line. In the INFO message, the information element for storing the information used in the authentication operation needs to be newly defined by the system using an extension code, and is, for example, an authentication request / response 2004. When using the INFO message 2001, the use of the extension code is designated by the fixed shift 2003. In the position registration sequence example shown in FIG. 5, public C
Upon receiving the authentication request message 1801 from S106, the radio controller 110 sets the code indicating the authentication request and the authentication random number 1802 in the received authentication request message 1801 to I.
Authentication request / response 2004 in NFO message 2001
And transmits to the business site CS 107 via the telecommunication lines 124 and 123. When an authentication response message 1901 is transmitted from the public PS 102 to the business CS 107, the business CS 107 sends a code indicating the authentication response and the authentication calculation result 1902 in the received authentication response message 1901 to the authentication request in the INFO message 2001. / Response is set to 2004 and is transmitted to the radio controller 110 via the telecommunication lines 123 and 124.

During the authentication operation, the PBX 111 sends an INFO message 2001 from the wireless controller 110 to the office C.
Only by relaying to S107 or from the business site CS107 to the wireless control device 110, the public subscriber exchange 401
Authenticates the public PS 102. The PBX 111 does not need to have the data about the public PS 102.

In FIG. 5, the location of the public PS 102 is registered with the public subscriber exchange 401 via the wireless control device 110, but the public line 12 of the PBX 111 is used.
It is also conceivable to use the method of 2).

FIG. 11 shows an example of a public CS-PBX correspondence table required at that time. Public CS- in FIG.
The PBX correspondence table 1101 is an example of a table held by the public subscriber exchange 401 to store the business office 116 in which the public CS 106 is arranged, and the CS number 110
2, physical position information 1103 and corresponding number 1104. The CS number 1102 stores the CS number of the public CS installed in the business office, for example, the public CS 106. The physical location information 1103 indicates the location where the public CS exists. The corresponding number 1104 is the public CS
The public subscriber telephone number of the business office in which is located, for example, the public subscriber telephone number 115 of the PBX 111 is stored.

When the location registration is performed using the public line 122 of the PBX 111, if the public PS 102 is not the PS registered in the location management table 209 in step 403 of FIG. 5, the PBX 111 sets the call setup message shown in FIG. A code indicating location registration is set in facility 1402 in 1401 and public PS is set in calling subaddress 1404.
The PS number of 102 and the calling number 1403 of PBX1
11 public subscriber telephone numbers 115 are set and transmitted to the public subscriber exchange 401.

Upon receiving the call setup message 1401, the public subscriber exchange 401 receives the INFO shown in FIG.
A code indicating an authentication request and a random number generated by the public subscriber exchange 401 are set in the authentication request / response 2004 in the message 2001, and the called number 2002 is set to PBX111.
The public subscriber telephone number 115 is set and transmitted to the PBX 111. INFO message 2 from public subscriber exchange 401
Upon receiving 001, the PBX 111 changes the called number 2002 in the received message to the PS number of the PS 102 and sends it to the business site CS 107.

Further, from the public PS 102 to the business CS
When the authentication response message 1901 is sent to 107, the business site CS 107 sends the INFO message 20 shown in FIG.
A code indicating an authentication response and the content of the authentication calculation result 1902 in the authentication response message 1901 are set in the authentication request / response 2004 in 01 and transmitted to the PBX 111.

The PBX 111 transmits the received INFO message 2001 to the public subscriber exchange 401. The public subscriber exchange 401 determines whether the authentication calculation result is correct, and if it is correct, the public CS-PBX correspondence table 110 of FIG.
1 using the PBX111 public subscriber telephone number 115
The CS number of the public CS 106 is obtained from the above, and is registered in the location management table 209 of FIG. 4 together with the PS number of the public PS 102.

FIG. 12 is a public PS1 whose location is registered in the PBX 111 in the mobile communication system shown in FIG.
02 is an example of a sequence for transmitting to the terminal 109 of the public network.

When the call setup message is transmitted from the public PS 102 to the PBX 111, the PBX 111 determines in step 501 whether the PS of the transmission source is the PS of the subscriber of the PBX 111, and if it is not the PS of the subscriber, the step is executed. Proceed to 502. In step 502, it is determined whether the call is an outside call. If it is an outside call, the PBX 11
1 transmits a call setup message to the wireless controller 110. The radio controller 110 transmits a call setup message to the public subscriber exchange 401 via the public CS 106.

The public subscriber exchange 401 sends a call setting confirmation message to the public CS 106, the radio controller 110, and the PB.
X111, PS10 for public through CS107 for business
After sending the message to the PS2, the authentication operation is performed, and if the authentication is successful in step 503, a call setting acceptance message is sent to the public PS 102 to call the called side. After the call,
Charges are made to the public PS 102.

If the authentication fails in step 503, a release completion message is transmitted to the public PS 102. In the sequence of FIG. 12, CS107 for business office to PB
The call setup message 1401 shown in FIG. 7 is used as the call setup message used in the wired section between the X111 and PBX111 and the wireless control device 110. At that time, the calling number 1403 in the call setup message 1401 is the P of PS102.
Set the S number.

FIG. 13 shows a public PS1 registered in the PBX 111 in the mobile communication system shown in FIG.
02 is an example of a sequence of receiving a call from the terminal 109 of the public network.

Upon receiving the call setup message from the calling terminal 109, the public subscriber exchange 401 searches the location management table 209 for the location information of the destination PS 102. As described in the position registration sequence example of FIG.
The public PS 102 in 6 is registered in the public CS 106 regardless of the position information in the business office 116,
The public subscriber exchange 401 sends a message to the public CS 106.

Upon receiving the call setup message from the public subscriber exchange 401, the public CS 106 receives the call from the radio controller 110.
A call setup message is transmitted to the PBX 111 via the. Called party number 1405 of the call setup message 1401 shown in FIG.
Contains the PS number of PS 102. Upon receiving the call setup message 1401, the PBX 111 searches the location management table 209 in step 601 and sends the call setup message to the corresponding business CS 107. PS10 that received the call setup message from the business CS 107
2 is a call setting acceptance message CS107, P for business
It is transmitted to the public subscriber exchange 401 via the BX 111, the wireless control device 110, and the public CS 106.

The public subscriber exchange 401 authenticates the called PS 102 as in the case of FIG. 5, and if the authentication is successful, calls the called PS 102 and waits for a response. If the authentication is unsuccessful, a release completion message is sent to the callee PS 102 and a disconnection message is sent to the calling terminal 109, and the process ends.

FIG. 14 shows that when the public PS 102 whose position is registered in the PBX 111 transmits to the terminal 109 of the public network,
Based on the personal information of the PS owner, the wireless control device 110,
PBX111 instead of communication path via public CS106
In the example of the personal information table used for permitting the use of the public line 122, the example in which the case is particularly used in a department store is shown.

The personal information table 801 is provided in the database 212 connected to the PBX 111. The public PS is identified by its PS number 702, and various information is managed in correspondence with the PS number 702. Call rate 703 is PS for PS
The billing method 704 is additional information for billing the call fee 703 from the PS owner, for example, a discount rate. Indicates. Personal information corresponding to PS number 7
Reference numeral 05 is personal information of the person who owns the PS, which includes, for example, the name 802 of the owner of the PS, the membership number 803 registered in the department store, and the shopping situation 804.

FIG. 15 shows that when the public PS 102 whose position is registered in the PBX 111 transmits to the terminal 109 of the public network,
This is a sequence example in the case of permitting the use of the public line 122 of the PBX 111 instead of the communication path via the wireless control device 110 and the public CS 106 based on the personal information table 801 of the PS owner shown in FIG.

When the public PS 102 in the office 116 sends a call setup message to the PBX 111 via the office CS 107, the PBX 111 determines in step 901 whether the source is the PS of the subscriber of the PBX 111. ,
If it is not the subscriber's PS, the process proceeds to step 902. In step 902, it is determined whether the request is for an outside line, and if it is an outside line, the process proceeds to step 903.

In step 903, the personal information table 801 shown in FIG. 14 is searched, and if the use of the public line 122 of the PBX 111 is not recognized as a result, the PBX 111 sends a call setup message to the wireless controller 110 as in FIG. And the radio controller 110 sends the public CS 106
The call setup message is transmitted to the public subscriber exchange 401 via the. In addition, the billing after the call ends is the public PS for the caller.
102 will be charged. On the other hand, as a result of step 903, P
When the use of the public line 122 of the BX 111 is approved, the PBX 111 sends a call setup message to the public subscriber exchange 401 by the public line 122. At this time, the caller number 1403 of the call setting message 1401 contains the public subscriber telephone number 115 of the PBX 111, and the PBX 111 is charged after the call ends.

FIG. 16 shows the PS 10 of the subscriber of the PBX 111.
3 makes a call to the terminal 109 of the public network, the PBX 111
When the public line 122 of is busy or blocked,
It is a sequence example in the case of making a call to the public subscriber exchange 401 via the wireless control device 110 and the public CS 106.

From the business PS 103 to the business CS 10
When the call setup message is transmitted to the PBX 111 via the step 7, step 901 in the sequence example of FIG.
Similar to step 902, determination is made in steps 1001 and 1002. Then, in step 1003, the closed state of the public line 122 is checked. If the public line 122 is available, the PBX 111 uses the public line 122 to send a call setup message to the public subscriber exchange 401.

On the other hand, if busy or blocked,
The PBX 111 sends a call setup message to the radio controller 110, and the radio controller 110 sends the call setup message to the public subscriber exchange 401 via the public CS 106. Calling number 14 of call setup message 1401 used
In 03, regardless of whether the public line 122 is blocked, P
The public subscriber telephone number 115 of BX111 is entered. FIG.
Then, the calling terminal is PS, but it can be considered as a wired terminal of a subscriber of PBX111. In this case, the call setting message 1401 shown in FIG. 7 is transmitted from the wired terminal directly to the PBX 111 using the telecommunication line, and the process proceeds to step 1002 in FIG.

Furthermore, when a call is made using the public CS 106 and a vacancy occurs in the public line 122 of the PBX 111 during a call, the call path of the call is switched to the public line 122 whose communication charge is lower than that of the wireless line. It is also possible.

FIG. 17 shows that when a public PS 102 registered in the PBX 111 receives an incoming call from a public network terminal 109, the public CS 106 located in a business office 116 has a busy or blocked communication channel. When the figure 1
2 is an example of a sequence for receiving an incoming call on the public line 122 of the PBX 111 by using the public CS-PBX correspondence table 1101 of 1.

When a call setup message is sent from the originating terminal 109 of the public network to the public subscriber exchange 401, the public subscriber exchange 401 sends a call setup acceptance message to the originating terminal 109, and at the same time, the terminal 102 of the terminal 102 to receive the call. The location information is stored in the location management table 20 in the public subscriber exchange 401.
Search from 9. When the terminal 102 to receive the call is a public PS in the office 116, the location is registered in the public CS 106, and therefore, in step 1201, the blocking status of the speech channel of the public CS 106 is checked. When the call channel is available, the public subscriber exchange 401 sends a call setup message to the public CS 106.
Upon receiving the call setup message, the public CS 106 transmits the call setup message to the PBX 111 via the wireless control device 110. The PBX 111 searches the location management table 209 for the location information of the PS 102 that should receive the call within the office 116, and sends a call setup message to the PS 102 via the office CS 107.

On the other hand, as a result of step 1201, public CS
If 106 channels are busy or blocked,
In step 1202, the public subscriber exchange 401
Public CS-PBX correspondence table 110 shown in FIG.
The CS number of the public CS 106 is searched from 1. If it exists, the call setup message is transmitted to the PBX 111 having the public subscriber telephone number 115 which is the corresponding number 1104 of the public CS 106, and the PBX 111 searches the location management table 209 for the location information of the PS 102 within the office 116. Then, the call setup message is transmitted to the PS 102 via the business CS 107. If there is no CS number of the public CS 106 in step 1202, the call is not connected.

Further, in FIG. 17, the communication path via the public CS 106 is preferentially selected.
When the public line 122 of 111 is used preferentially and the public line 122 is busy or blocked, the public CS
A method of receiving an incoming call via 106 is also conceivable. In this case, step 1201 of FIG. 17 is not performed, and the process proceeds to step 1202. In step 1202, if the public CS 106 is located in the business office, the blocked state of the public line 122 of the PBX 111 is checked. As a result, if there is a vacancy in the line, the public subscriber exchange 401 sends a call setup message to the PBX 111. On the other hand, if there is no free space, step 1201 is performed, and if there is a free communication channel in the public CS 106, a call setup message is transmitted to the public CS 106. If no channels are available, no connection will be made. Also, step 1
If it is not the public CS installed in the business office in 202, the ordinary public PS is processed.

At this time, when there is a vacancy in the public line 122, it is possible to switch the communication path from the public CS line to the public line 122 with a low communication charge.

FIG. 18 shows PS1 of a subscriber of PBX111.
03 from the terminal 109 of the public network, PBX11
This is an example of a sequence for receiving an incoming call via the wireless control device 110 when the first public line 122 is busy or blocked.

When the call setting message 1401 shown in FIG. 7 is transmitted from the originating terminal 109 of the public network to the public subscriber exchange 401, the public subscriber exchange 401 sends the call to the originating terminal 10.
The call setup acceptance message is transmitted to 9. If the called number 1405 of the call setup message 1401 is the subscriber telephone number 115 of the PBX, the PB at step 1301.
Check the blocked state of the public line 122 of X111.

When the public line 122 has a free space, the line 122 transmits a call setting message to the PBX 111. Upon receiving the call setup message, the PBX 111 searches the location management table 209 for the location information of the receiving terminal 103 within the office 116 and sends the call setup message to the terminal 103.

On the other hand, if the public line 122 of the PBX 111 is busy or blocked in step 1301,
Public CS-PBX shown in FIG. 11 in step 1302
PBX1 from the correspondence number 1104 in the correspondence table 1101
11 public subscriber telephone number 115 is searched, and if present, the CS number of public CS 106 corresponding to the public subscriber telephone number 115 is further searched, and the public CS 1
A call setup message is sent to 06. Upon receiving the call setup message, the public CS 106 transmits the message to the PBX 111 via the wireless control device 110.

The PBX 111 searches the location management table 209 for the location information of the receiving terminal 103 within the office 116, and sends a call setting message to the receiving terminal 103. In step 1302, the public subscriber telephone number 11 of the PBX 111 is added to the public CS-PBX correspondence table 1101.
If there is no 5, the call is not connected. Although the receiving terminal 103 is a business office PS in FIG. 18, it may be a wired terminal. In that case, the PBX 111 is the public subscriber exchange 4
01 or the call setting message from the radio controller 110, the PBX 111 transmits the call setting message to the terminal to which the call is to be received, using the telecommunication line.

Also, an incoming call is made using the public CS 106,
If a vacancy occurs in the public line 122 of the PBX 111 during a call, it is possible to switch the call path of the call from the wireless communication line to the public line 122 with a lower communication charge.

In the above, the mobile communication system to which the present invention is applied has been described by taking the interconnection between the public network and the PBX as an example. Generally, a plurality of mobile units composed of PS, CS having a transmitting / receiving means, and an exchange are provided. The same can be done when interconnecting communication networks.

[0071]

According to the present invention, even if the mobile terminal of the public network subscriber moves into the PBX network, the mobile terminal can freely communicate with the public network terminal.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a mobile communication system implementing the present invention.

FIG. 2 is a block diagram of a PBX to which the present invention is applied.

FIG. 3 is a block diagram of a wireless control device according to the present invention.

FIG. 4 is an explanatory diagram of a location management table of a mobile terminal held by the PBX or public subscriber exchange used in the present invention.

FIG. 5 is an explanatory diagram of a case where a public mobile terminal performs location registration from a PBX network to a public subscriber exchange.

FIG. 6 is an explanatory diagram of a location registration request message in the second-generation cordless telephone system standard issued by RCR.

FIG. 7 is an explanatory diagram of a call setup message in the ISDN interface.

FIG. 8 is an explanatory diagram of an authentication request message in the second-generation cordless telephone system standard issued by RCR.

FIG. 9 is an explanatory diagram of an authentication response message in the second-generation cordless telephone system standard issued by RCR.

FIG. 10 is an explanatory diagram of an INFO message in the ISDN interface.

FIG. 11 is an explanatory diagram of a public network base station-PBX correspondence table of the public subscriber exchange used in the present invention.

FIG. 12 is an explanatory diagram of a case where a public mobile terminal makes a call from a PBX network to a public network terminal.

FIG. 13 is an explanatory diagram when a public mobile terminal receives an incoming call from a public network terminal in a PBX network.

FIG. 14 is an explanatory diagram of a personal information table of a public mobile terminal used in the present invention.

FIG. 15 is an explanatory diagram of a case where the public mobile terminal permits the use of the PBX public line by the personal information of the mobile terminal owner when the public mobile terminal makes a call to the public network terminal from within the PBX network.

FIG. 16 shows a case where a PBX subscriber terminal makes a call from a PBX network to a public network terminal, and when the PBX public line is busy or blocked, a call is made via a wireless control device. Explanatory drawing.

FIG. 17 shows a case where a public mobile terminal receives an incoming call from a public network terminal in the PBX network, and the public channel of the PBX receives an incoming call when the call channel of the base station of the public network is busy or blocked. Explanatory drawing of.

FIG. 18 shows a case where a PBX subscriber terminal receives a call from a public network terminal in the PBX network, and when the PBX public line is busy or blocked, a call is received via the wireless control device. Explanatory drawing.

[Explanation of symbols]

102 ... Public mobile terminal, 106 ... Public base station, 10
7 ... Business base station, 110 ... Wireless control device, 111 ...
PBX, 112 ... Public network, 209 ... Location management table,
801 ... Personal information table 1101 ... Public base station-
PBX correspondence table.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikiya Naemura 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi Ltd. Information & Communication Division

Claims (8)

[Claims] 1. A mobile terminal having a transmitting / receiving means, a base station, a private branch exchange (hereinafter referred to as PBX), and a public subscriber exchange. The mobile terminal and the base station are connected by a wireless communication means, and the base station and the base station are connected to each other. PBX and public subscriber exchange, P
In a mobile communication system in which the BX and the public subscriber exchange are connected by a telecommunication line means, a base station of a public network (hereinafter referred to as a public base station) is installed in a business establishment having the PBX, and the public base Provided within the radio range of the station is a radio control device having a radio communication means having the same function as a mobile terminal of a public network (hereinafter referred to as a public mobile terminal) and connected to the PBX by the electric communication line means. In the case where the PBX receives a call request to the public network from the public mobile terminal via a base station connected to the PBX (hereinafter referred to as a business base station), the PBX sends a call request to the wireless control device. Transmitting, the radio controller receiving a call request from the PBX transmits to the public network through the public base station, and the radio controller further transmits from the public network through the public base station. The above When receiving an incoming call request to a public mobile terminal, the incoming call request is transmitted to the PBX by the telecommunication line means, and the PBX that receives the incoming call request from the wireless control device is transmitted via a business base station. When the public mobile terminal moves into the office by calling the public mobile terminal, even if the public mobile terminal is out of the wireless coverage of the public base station, the public mobile terminal may be the business base station, the PBX, or the radio. A method for interconnecting wireless networks, characterized in that a communication device can communicate with a terminal of a public network through the public base station. 2. A wireless communication means having the same function as that of the public mobile terminal according to claim 1, the wireless communication means being connected to the PBX by an electric communication line means, and the public mobile terminal being further connected to the public mobile terminal.
A means for transmitting to the public base station by the wireless communication means when receiving a transmission request to the public network via the PBX,
And a means for receiving a call from the public base station to the public mobile terminal via the PBX and the business base station when the public base station receives an incoming call request from the public base station. When the mobile terminal for public use moves within the business site by being placed within the wireless coverage of the public base station, the public base station relays between the business base station, the PBX and the public base station, Wireless control device that enables communication between a mobile terminal for public use and a terminal in a public network. 3. When the public mobile terminal moving inside the business office makes a call to or from the public network according to claim 1, the same information as the information transmitted from the public mobile terminal to the business base station is used. Transmitting information from the wireless control device to the public base station via the PBX, and further transmitting the same information as the information transmitted from the public base station to the wireless control device by the PB.
A wireless network interconnection method for transmitting from a business base station to the public mobile terminal via X. 4. The radio control device according to claim 1, when receiving an incoming call from a public network to a public mobile terminal moving in a business office, the radio control device receiving an incoming call request from a public base station located in the business office is the PBX. The PBX that has received the incoming call request from the wireless control device retrieves the location information of the public mobile terminal in the PBX within the business establishment, and the location-registered business base station. By calling the public mobile terminal via the business base station, even when the public mobile terminal is out of the radio range of the public base station, the radio coverage of the business base station An inter-wireless network interconnection method that enables incoming calls to the public mobile terminal if inside. 5. The PB when transmitting to a public network from within a business office to an owner of a public mobile terminal according to claim 1.
Creating and changing personal information for deciding whether to make a call by means of a telecommunications line connecting X and a public subscriber exchange, or to make a call via a radio control device or a public base station located in the office Providing means for storing in the PBX, and further, when there is a call request from the public mobile terminal to the public network, the PBX connects the PBX to the public subscriber exchange based on the personal information. A wireless network interconnection method for determining whether to make a call by a communication line means or to make a call via the wireless control device and the public base station. 6. The PBX according to claim 1, when a call is made from a terminal of a subscriber of the PBX to a public network.
Is a method for interconnecting wireless networks that sends out via a wireless control device and a public base station located in a business office when the telecommunications line means with the public subscriber exchange is busy or blocked. 7. The public subscriber exchange according to claim 1,
When a business station in which a public base station is installed is stored and a public mobile terminal moving in the business station receives a call from the public network, the call channel of the public base station is busy or blocked. When there is, a method for interconnection between wireless networks in which the PBX of the business in which the public base station is located and the telecommunications line means connecting the public subscriber exchange are used for receiving. 8. The method according to claim 1, wherein when an incoming call is made from a public network to a subscriber terminal of the PBX, when the telecommunications line means connecting the PBX and the public subscriber exchange is busy or blocked. A method for interconnecting wireless networks that receives a call via a public base station or wireless control device.