JP3080193B2 - Mobile communication routing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a routing method for reliably realizing a call termination service such as call waiting in mobile communication.

[0002]

2. Description of the Related Art FIG. 2 shows a configuration of a conventional mobile communication system.
Show. Reference numeral 1 denotes a mobile terminal.
It is assumed that you have joined the service. 2₁And 2_TwoIs moved
Fixed terminal or mobile terminal that communicates with the mobile terminal 1, 3, 4,
5₁, 5_TwoIs a mobile switching center, 3 is a terminal 2₁Also
Is 2_TwoThe first mobile switching center connected from
Relay system switching office, 5₁And 5_TwoIs the same location registration area 3
The subscriber-based exchange located in 0, 6 records the information of the mobile terminal 1.
20 home memories to remember₁And 20_TwoIs 4 and 5 ₁as well as
5_TwoAre connected to each other. Also, in this specification
Is between any subscriber when the mobile terminal 1 is not communicating.
Call connection such as outgoing / incoming call, so-called normal call connection
This is called a first communication, and another communication is performed during communication by the first communication.
Call connection (for example,
The incoming call during a call, such as a telephone, is called the second communication.

[0003] First when the mobile terminal 1 is the location registration under the subscriber switching station 5 _1, switching station 5 ₁ is information of the position registration area 30 and the routing destination subscriber exchange station information to the home memory 6 registration・ It is memorized. In this state, local switch is a routing destination subscriber exchange station information request of the first communication from the terminal 2 ₁ to the mobile terminal 1 is stored in the first home memory 6 in the mobile communication switching center 3 to occur first connect to the relay system switching center 4 to station 5 ₁ as a connection destination,
In switching center 4 selects a line 20 ₁ to the switching station 5 _1. At this time, when the line 20 ₁ to the switching station 5 ₁ is not possible sets a line failure or congestion, the first communication performed another detour to subscriber switching station 5 ₂ of the same location registration area 30 It is established.

[0004]

In the case of the above prior art,
When the first communication is established via another exchange in the same location registration area, the location registration area does not change, so that the information of the subscriber exchange of the routing destination in the home memory is not updated. In this state, the subscriber exchange having performed the above operation is stored. Therefore, when the second communication is requested from another terminal during the first communication, the routing is performed with the subscriber switching center registered in the home memory as a connection destination. There is a drawback that the second communication becomes difficult because it is not connected to the subscriber switching center which is the detour destination which is the call control station.

It is an object of the present invention to provide a new routing method which solves the above-mentioned disadvantages.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a home switching system for performing call control of a first communication of a mobile terminal in a home memory for storing information of the mobile terminal. Registered as a station, and when a second communication to the mobile terminal arrives, it is possible to perform routing based on information of the first communication call control station registered in the home memory, and at the time of the second communication, It is characterized in that connection to other than the call control station is restricted.

[0007]

FIG. 1 shows a basic configuration of the present invention. 1 mobile terminal, 2 ₁ and 2 ₂ are fixed terminals or mobile terminals communicating with the mobile terminal 1, 3,4,5 _1, 5 ₂ is a mobile communication switching center, 3 from the terminal 2 ₁ or 2 ₂ the first mobile switching center coming connected, the fourth relay system exchange station, 5 ₁ and 5 ₂
Is a subscriber exchange located in the same location registration area 30, 6
Line that connects home memory for storing information of the mobile terminal 1, 20 ₁ and 20 ₂ are 4 and 5 ₁ and 5 _2, respectively,
10 ₁ and 10 ₂ registered necessity determination circuit to the home memory 11 ₁ and 11 ₂ are registered signal transmission apparatus to the home memory 18 ₄ is bypassed determination circuit. The meanings of the first communication and the second communication are the same as those described in the section of the prior art.

When an incoming call arrives at a mobile terminal, the home memory 6
Based on the registered destination switching center information
Routing is performed. In the present invention, this exchange
Bureau 5 ₁At the time of the₁Times
When setting is not possible due to line failure or congestion, a detour possibility determination circuit 1
8_FourDetermines whether to allow detour to another station
You. In the case of the first communication, the detour is allowed and the location area 30
Other local exchanges 5 in_TwoLine 20 to_TwoConnectable to
If so, a detour is performed. Here, the terminal 2
₁And the mobile terminal 1 are connected to the local exchange 5_TwoUnder the call control of
If the first communication is established in_TwoThen registration is necessary
Constant circuit 10_TwoExchange stored in home memory 6 by
5₁And own station 5_TwoAre different, so registration is required.
Set registration signal transmission device 11_TwoAnd call control station
To store the routing information of the destination local exchange in the home memory.
Update.

[0009] Then the terminal 2 ₂ from the second mobile switching center 3 the request is first connected when there communications relay system switching center 4 for performing routing to the exchange 5 ₂ registered in the home memory 6 Select and connect to the line, and send subscriber information about the mobile terminal 1. Select line 20 ₂ to the switching station 5 ₂ of interest by the relay system switching center 4 this information,
Connecting.

FIG. 3 shows the configuration of the present invention in more detail.
In the figure, 12 is a location information storage circuit for storing location registration area information of a mobile terminal, 13 is a switching center storage circuit for storing a subscriber switching center serving as a call control station of the mobile terminal, and 14 is a subscription service of the mobile terminal. A service information storage circuit 15 (for example, call waiting or call transfer) stores a communication status storage circuit 15 for storing the communication status of the mobile terminal, and is provided in the home memory 6. 16 ₃ , 16 ₄
There are respectively the switching center 3 and 4, the connection destination analyzing circuit for analyzing a destination like based on the information and line information of the mobile terminal 17 ₄ is in the 4 relay system exchange station, a location registration area Is a line candidate storage circuit for storing lines that can be set to a plurality of local exchanges.

[0011] Here, first, the mobile terminal 1 transmits another location registration e-mail.
From the rear, the subscriber switching center 5 in the location registration area 30
₁When the mobile terminal 1 moves under the control, the mobile terminal 1₁To
The location is registered in the home memory 6 through the communication. The result
As a result, the new location registration area 3 is stored in the location information storage circuit 12.
0, and the routing destination is added to the exchange storage circuit 13.
Exchange information (exchange 5₁) Is stored.

[0012] Next, when the communication request to the mobile terminal 1 from the terminal 2 ₁ occurs (the first communication), the first mobile communication switching station 3 inquires the subscriber information of the mobile terminal 1 to the home memory 6 . The subscriber information includes service information (second
Incoming calls can be received), the communication state (vacant state), the location registration area 30 where the mobile terminal 1 is located, and information on the local exchange to which the mobile terminal 1 is to be routed (here, the exchange 5 ₁ ). . Mobile switching center 3, the connection destination analysis circuit 16 _3, based on the switching center information to analyze the connection destination is connected to the relay system switching center 4 together with the information of the mobile terminal 1.

[0013] Next, the relay-based switching center 4, the connection destination analysis circuit 16 ₄ based on the above exchange station information to analyze the destination, try to configure line 20 ₁ to subscriber switching station 5 ₁ and I do. If this time line 20 ₁ is not possible set by the line failure or congestion, etc., the communication state information and service information of the subscriber information on the mobile terminal 1 was analyzed and for the first communication by the detour determination circuit 18 ₄ It is determined that the detour is possible. Next, in order to make a detour, the line candidate storage circuit 1
From 7 ₄ , the local exchange 5 ₂ in the location registration area 30
Select and set the line 20 ₂ to, to connect. At this time, similarly to the above, the subscriber information of the mobile terminal 1 is stored in the subscriber switching center 5.
Sent to ₂ .

[0014] The subscriber exchange station 5 ₂ in the position registration area 3
At the same time, the mobile terminal 1 makes a paging call. Here, when the mobile terminal 1 responds registration necessity switching center information in the subscriber information of the mobile terminal 1 by the determination circuit 10 ₂ analyzes the switching center 5 ₁ information and own station included in the mobile switching center information 5 ₂ and from differ, by the registration signal sending circuit 11 ₂ determines that it is necessary to update the home memory 6 sends a registration signal to the home memory 6. As a result the switching center storing circuit 13 subscriber information is updated newly subscriber switching station 5 ₂ related to the mobile terminal 1 to the home memory 6 is registered as the routing destination subscriber switching station. Thus, the communication of the first communication is started.

[0015] After this, a from the terminal 2 ₂ to the mobile terminal 1 2
When a communication request occurs, the first mobile communication switching center 3 inquires the home memory 6 about the subscriber information of the mobile terminal 1,
Service information (second communication call possible), communication state (first communicating), obtains information of the location area information and exchange station information (first communication call control station 5 _2), connected by the connection destination analysis circuit 16 ₃ The destination is analyzed and connected to the relay switching center 4 together with the information of the mobile terminal 1.

Next, the relay-based switching center 4, the connection destination analyzing circuit 16 ₄ by analyzing the destination, the first communication call control station 5 ₂
Set the line 20 ₂ to, to connect. At this time, the line 20 ₂
There is also impossible set by line failure or congestion, etc., bypassing for the second communication by the detour determination circuit 18 ₄ judges impossible. When connected to the call control station 5 ₂ during the first communication,
And controls the mobile terminal 1, incoming call processing of the second communication in the first communicating is performed, the mobile terminal 1 terminal 2 ₁ and the terminal 2 ₂
Can communicate with both.

[0017]

As described above, according to the present invention, registration of a call control station is performed only when necessary, so that when a request for the second communication occurs, useless line setting to another exchange is performed. It is possible to carry out efficient routing to the target exchange without performing the above. Further, even if a failure occurs in the line from the mobile communication exchange to the subscriber exchange registered in the home memory at the time of the first communication, the second communication such as the incoming call during the communication is performed.
There is an effect that communication can be performed without any trouble.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is a diagram showing a conventional configuration.

FIG. 3 is a diagram showing a detailed configuration of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mobile terminal 3 Mobile communication switching center 4 Relay system mobile communication switching center 5 ₁ Subscriber system mobile communication switching center 6 Home memory

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinobu Kanashige 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-58-222629 (JP, A) JP-A-2-162845 (JP, A) JP-A-4-42696 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 3/42 H04Q ^7/ 00-7/38

Claims (1)

(57) [Claims] 1. A mobile device capable of performing a first communication process, which is a normal communication such as an outgoing / incoming call, and a second communication process for processing a communication request from a different subscriber during communication in the first communication process. The terminal and the location registration area where this mobile terminal is located
A plurality of subscriber switching station with a connection control function Te comprises with these subscriber switching station relay switching center to relay connection, and a home memory for storing subscriber information on the mobile terminal, to said mobile terminal When the incoming line is connected, the relay exchange performs routing to the subscriber exchange registered in the routing destination subscriber exchange information included in the subscriber information, and the connection to the subscriber exchange is established. If not possible,
It has a function of performing routing to other subscriber exchanges existing in the same location registration area, and when executing the terminating line connection processing, the subscriber exchange that has executed the line control to the mobile terminal, A mobile communication routing method, wherein said routing destination local exchange information is updated.