JPH0832512A - Simultaneous calling start-up system - Google Patents

Abstract

PURPOSE:To obtain a simultaneous calling start-up system in which an optimum path from an exchange station inquiring about routing information of a home location register to a mobile exchange in which a mobile equipment is resident without ineffective holding of a channel to the resident network when the mobile equipment cannot reply a simultaneous call. CONSTITUTION:When a call from a terminal equipment 16 connecting to an exchange station 15 is made to a mobile equipment 1 and the exchange station 15 inquires of a home location register 51 about routing information to route a call to the mobile equipment 1, the home location register 51 inquires of a visitor location register 111 in a resident network 3 of the mobile equipment 1 about the routing information via a signal line 19. Then the visitor location register 111 executes simultaneous calling of the mobile equipments 1 via a mobile exchange station 7 and base stations 8a, 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous call activation system in a mobile communication system.

[0002]

2. Description of the Related Art In the conventional simultaneous call activation method,
This will be described with reference to the mobile communication system shown in FIG. FIG.
In FIG. 1, 1 is a mobile device, home network 2 is a network with which the mobile device 1 has a contract to receive a communication service, and a visited network 3
Is the network in which the mobile device 1 is located, the communication network 4 is the home network 2,
It is a network different from the visited network 3.

In the home network 2, 5 is the mobile device 1 when the mobile device 1 is roaming to a network other than the home network.
It is a home location register that stores the network address of the network in which is located.

In the visited network 3, a gateway switching station 6 is a switching station or a mobile switching station 7 which establishes a line connection between the visited network 3 and another network.
Is a switching station that performs line setting and call control with the mobile device 1, base stations 8a and 8b are stations connected to the mobile switching center 7,
The wireless zones 9a and 9b are wireless zones formed by the base stations 8a and 8b, respectively, the location registration area 10 is composed of the wireless zones 9a and 9b, which is a unit of paging, and the visitor location register 11 is located in the visited network 3. Position information (that is, an identifier of the location registration area (location registration area I) within the visited network 3 for each roaming mobile device.
D) and a register for storing the mobile switching center ID of the mobile switching center included in the location registration area, the communication line 12 is a communication line between the gateway switching center 2 and the mobile switching center 7, and lines 13a, 1
Reference numeral 3b is a line for transmitting communication information and control information between the mobile switching center 7 and the base stations 8a, 8b, and a signal line 14 respectively.
Reference numerals a and 14b are signal lines for transmitting control signals between the gateway switching center 2, the mobile switching center 3 and the visitor location register 11, respectively.

In the communication network 4, 15 is an exchange station,
The terminal 16 is a terminal connected to the exchange 15.

A signal line 17 is a signal line for transmitting a control signal between the home location register 5 and the switching center 15, and a line 18 is a line for transmitting communication information between the switching center 15 and the gateway switching center 6. Is.

In the conventional system, when the terminal 16 connected to the exchange 15 makes a call to the mobile station 1, the exchange 15
Sends a routing information inquiry signal including the mobile station number assigned to the mobile station 1 to the home location register 5 through the signal line 17 in order to obtain the routing information necessary for routing the call.

Upon receiving the signal, the home location register 5 obtains the network address of the visited network 3 in which the mobile station 1 is located based on the mobile station number contained in the signal, and inquires the routing information to the switching center 1 about this. The exchange 15 is returned by the response signal.

Upon receiving the response signal, the exchange 15 analyzes the network address of the visited network 3 included in the signal, selects the line 18 to the gateway exchange 6 of the visited network 3, and selects the gateway exchange. Two
An address signal indicating that the line 18 is selected is transmitted to the terminal 16 and the communication line 18 is connected to the terminal 16. The address signal includes the network address and the mobile unit number of the mobile unit 1.

The gateway exchange 6 which has received the address signal
Knows from the network address contained in the address signal and the mobile unit number of the mobile unit 1 that the routed call is a call to the mobile unit 1 existing in its own network.
A routing information inquiry signal including the mobile unit number of the mobile unit 1 is sent to the visitor location register 11 via the signal line 14a in order to obtain the routing information of the call through a.

Upon receipt of the inquiry signal, the visitor location register 11 uses the mobile station number of the mobile station 1 included in the signal to register the location assigned to the location registration area 10 in which the mobile station 1 is located. In order to obtain the area ID and the mobile switching center ID of the mobile switching center 7 included in the location registration area 10 and determine to which mobile zone the mobile unit 1 is located, A general paging request signal including the location registration area ID and the mobile unit number of the mobile unit 1 is sent to the mobile switching center 7 via the signal line 14b to instruct execution of the general paging.

The mobile switching center 7 which has received the paging request signal includes the mobile station number of the mobile station 1 through the lines 13a and 13b for the base stations 8a and 8b included in the location registration area included in the signal. Then, the base station 8a, 8b sends the signal to the wireless zones 9a, 9b, respectively.

When the mobile device 1 receives the paging signal, it returns a paging response signal, which is a response to the paging signal, to the base station 8a (where the mobile device 1 is located in the wireless zone 8a). Suppose). The base station 8a is
A general call response signal including routing information capable of routing a call to the own station is sent to the mobile switching center 7 via the line 13a, and the mobile switching center 7 returns it to the visitor location register 11 via the signal line 14b. To do.

The visitor location register 11 returns the routing information to the base station 8a included in the general call response signal to the gateway exchange 6 as a routing information inquiry response signal via the signal line 14a.

Based on the routing information, the gateway switching center 6 selects a communication line 12 with the mobile switching center 7, and sends to the mobile switching center 7 an address signal containing the routing information to the base station 8a. It transmits and connects the communication line 18 and the communication line 12.

Mobile switching center 7 which has received the address signal
Analyzes the routing information contained in the signal, selects the line 13a to the base station 8a, sends an incoming signal to the base station 8a, and connects the communication line 12 and the line 13a. The base station 8a sends the incoming signal to the mobile device 1, and the incoming call to the mobile device 1 is made.

[0017]

As described above,
In the conventional method, since the mobile devices are called simultaneously in the visited network of the mobile device, it is necessary to set up a line to the incoming network, and the mobile device cannot be used because the mobile device is turned off. Even in this case, there is a problem that the line up to the incoming network is invalidly held.

Further, in the conventional method, only the address of the network in which the mobile station is located can be obtained by accessing the home location register, and therefore the switching center 15 must select the nearest line to the visited network 3. There was a problem in that even if an optimal route to the destination mobile switching center 7 exists, that route cannot be selected.

The present invention has been made in view of the above,
The purpose is that the mobile station does not hold the line to the visited network invalidly when the mobile station cannot respond to the simultaneous call, and the mobile station is visited from the switching center that inquires the home location register for routing information. The purpose of this is to provide a paging start method capable of selecting the optimum route to the existing mobile switching center.

[0020]

In order to achieve the above object, the simultaneous call activation method of the present invention is such that, when a mobile station moves to a visited network which is another mobile communication network, the home location register of the mobile station is set. In the case where the routing information to the visited network is set in, the location information of the mobile station in the visited network is set in the visitor location register of the visited network, and the call to the mobile station is routed, the home In the paging start method for obtaining the final position of the mobile device by obtaining the routing information to the visited network stored in the location register, paging from the visitor location register in the visited network, the home location register When a routing information inquiry is made to route a call to a mobile station, the visitor station of the visited network of the mobile station is And means for querying the routing information to Nrejisuta, the visitor location register, and summarized in that a means for performing paging of the mobile station on the basis of the inquiry.

[0021]

In the simultaneous call initiation method of the present invention, when an inquiry is made for routing information for routing a call to the mobile station, the home location register sends the routing information to the visitor location register of the mobile station's visited network. And the visitor location register executes a general call of the mobile devices based on the inquiry.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of a mobile communication system which implements the simultaneous call activation method according to an embodiment of the present invention. The system shown in the figure has the functions of the home location register and the visitor location register changed from those shown in FIG.
4 and 111, and a signal line 19 for transferring a control signal is provided between the home location register 51 and the visitor location register 111, and other configurations are the same. The same components as those of the above are denoted by the same reference numerals, and the description thereof will be omitted.

More specifically, the home location register 51, in addition to the functions described with reference to FIG. 4, receives the routing information for routing the call to the mobile station. In addition to the function described with reference to FIG. 4, the visitor location register 111 has a new function of inquiring about the routing information from the visitor location register 111 of the network. It has a new function to call mobile devices simultaneously.

The structure of the home location register 51 will be described with reference to FIG. In FIG. 2, the control circuit 20 is a circuit for controlling each part of the home location register 51, 21 is a memory, and the signal circuit 22 is a circuit for transmitting / receiving a signal to / from another node (exchange station, visitor location register, etc.), a network address. A table 23 is included in the memory 21, a table for storing the network address of the network in which the mobile station is located, and an address conversion table 24 are included in the memory 21, and the network address and the signal of the visitor location register are stored. It is a table that stores correspondences with addresses.

Next, the operation of this embodiment will be described with reference to the operation flow example of the home location register 51 shown in FIG.

In FIG. 1, when a terminal 16 connected to the switching center 15 makes a call to the mobile station 1, the switching center 15 sends a signal to obtain the routing information necessary for routing the call. A routing information inquiry signal including the mobile station number assigned to the mobile station 1 is sent to the home location register 51 through the line 17 (FIG. 3).
Step 110).

The signal is a home location register 5
1 signal circuit 22 receives and sends to the control circuit 20.
The control circuit 20 searches the network address table 23 using the mobile station number included in the signal (step 120) to obtain the network address of the visited network 3 in which the mobile station 1 is located. Next, the address translation table 24 is searched using the obtained network address to obtain the signal address of the visitor location register 111 of the visited network 3 (step 130). The control circuit 20 edits the routing information inquiry signal including the mobile station number of the mobile station 1, and based on the obtained signal address, sends the signal to the visitor location register 111.
The signal circuit 22 is instructed to transmit the signal to the visitor location register 111 via the signal line 19 (step 140).

Upon receiving the inquiry signal, the visitor location register 111 uses the mobile station number of the mobile station 1 included in the signal to register the location assigned to the location registration area 10 in which the mobile station 1 is located. In order to obtain the area ID and the mobile switching center ID of the mobile switching center 7 included in the location registration area 10 and determine to which mobile zone the mobile unit 1 is located, A general paging request signal including the location registration area ID and the mobile unit number of the mobile unit 1 is sent to the mobile switching center 7 via the signal line 14b to instruct execution of the general paging.

The mobile switching center 7 which has received the paging request signal includes the mobile station number of the mobile station 1 via the lines 13a and 13b for the base stations 8a and 8b included in the location registration area included in the signal. Then, the base station 8a, 8b sends the signal to the wireless zones 9a, 9b, respectively.

When the mobile device 1 receives the paging signal, it returns a paging response signal, which is a response to the paging signal, to the base station 8a (step 150) (where the mobile device 1 is in the wireless zone 8a). Assuming that you are). The base station 8a sends a paging response signal containing routing information capable of routing a call to itself to the mobile switching center 7 via the line 13a, and the mobile switching center 7 sends it via the signal line 14b. Location register 1
Return to 11.

The visitor location register 111, which has received the general call response signal, returns a routing information inquiry response signal including the routing information to the home location register 51.

The signal circuit 22 of the home location register 51 which has received the routing information inquiry response signal
Sends the signal to the control circuit 20, and the control circuit 20 edits the routing information inquiry response signal including the routing information to the base station 8a, and returns the signal to the switching center 15 to the signal circuit 22. , And the signal is returned to the exchange 15 via the signal line 17 (step 16).
0).

Upon receiving the response signal, the switching center 15 analyzes the routing information to the base station 8a included in the signal, selects the line 18 to the gateway switching center 6 of the visited network 3, and selects the gateway switching center. An address signal indicating that the line 18 has been selected is sent to the terminal 2, and the terminal 16 and the communication line 18 are connected. The address signal includes the routing information for the base station 8a and the mobile station number of the mobile station 1.

The gateway exchange 6 which received the address signal
Selects a communication line 12 with the mobile switching center 7 based on routing information to the base station 8a included in the address signal, and transmits an address signal containing the routing information to the mobile switching center 7, The communication line 18 and the communication line 12 are connected.

Mobile switching center 7 which has received the address signal
Analyzes the routing information to the base station 8a included in the signal, selects the line 13a to the base station 8a,
The incoming signal is sent to a and the communication line 12 and line 1
3a is connected. The base station 8a sends the incoming signal including the mobile device number of the mobile device 1 to the mobile device 1, and the incoming call to the mobile device 1 is performed.

[0037]

As described above, according to the present invention,
When a query for routing information is made to route a call to the mobile station, the home location register queries the visitor location register of the visited network of the mobile station for routing information, and the visitor location register responds to the inquiry. When a mobile device does not respond to a general call, the mobile device does not answer the incoming call to the mobile device before routing it to the visited network of the mobile device. , The call can be released immediately and the invalid line hold up to the visited network can be avoided. Also, since the final routing information can be obtained as a response to the inquiry to the home location register of the mobile device, the call can be routed by selecting the optimum route from the exchange that inquired about the routing information to the mobile device. it can.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a mobile communication system that implements a paging activation method according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a home location register used in the embodiment of FIG.

FIG. 3 is a flowchart showing the operation of the home location register shown in FIG.

FIG. 4 is a diagram showing a configuration of a mobile communication system for explaining a conventional simultaneous call activation method.

[Explanation of Codes] 1 mobile station 2 home network 3 visited network 4 communication network 6 gateway exchange 7 mobile exchange 8a, 8b base station 9a, 9b wireless zone 15 exchange 16 terminal 51 home location register 111 visitor location register

Claims (1)

[Claims] 1. When a mobile device moves to a visited network which is another mobile communication network, routing information for the visited network is set in a home location register of the mobile device, and a visitor location of the visited network is set. When setting the position information of the mobile device in the visited network in the register and routing the call to the mobile device, the routing information for the visited network stored in the home location register is obtained, In the paging start method in which the visitor location register makes a paging call in the visited network to find the final position of the mobile device, the home location register receives a routing information inquiry for routing the call to the mobile device. , A means for inquiring routing information to a visitor location register of the visited network of the mobile device, Data location register, paging activation method, characterized in that it comprises means for performing paging of the mobile station on the basis of the inquiry.