JP2001292480A - Digital cordless communication system - Google Patents

Abstract

(57) [Summary] [Problem] A plurality of self-employed digital cordless terminals (P
The business operator / individual who owns S) does not make a public wireless network registration contract with all PSs, so that all PSs can use the public wireless network and reduce communication costs. A PS notifies a public wireless network of a public representative PS number shared by a plurality of PSs as location registration information. This is recognized by the public wireless network 2, and a plurality of public real PSs stored as numbers related to the public representative PS number are stored.
Assign numbers on a first come, first served basis. Thereby, if the number of public real PS numbers for the public wireless network 2 is determined and a registration contract is made in accordance with the traffic used by the public wireless network 2, the contract line can be used effectively and the communication cost can be reduced. . or,
An incoming call to a PS not present in the private wireless area 14
Referring to the data transmitted from the public wireless network 2, the incoming call can be switched to the outside line transmission and the incoming call can be transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for registering a digital cordless terminal registered in a specific private wireless network so that the terminal can be used in a public wireless network, by connecting a plurality of lines to a plurality of digital cordless terminals. The present invention relates to a digital cordless communication system that can be registered.

[0002]

2. Description of the Related Art In a digital cordless communication system having a private or public wireless network represented by PHS, a digital cordless terminal (hereinafter referred to as PS) must be registered in both the private wireless network and the public wireless network. By
The same terminal can use communication in both areas. Also, in these digital cordless communication systems, a plurality of P
A plurality of lines can be registered for S.

[0003] In a public wireless network, it is very useful for out-of-office communication. In a private wireless network, it can be used as an extension telephone, so that communication costs can be reduced and communication delay due to absence or the like is small. Work efficiency can be improved. The greatest merit is that these services can be received without the user having to be conscious of the trouble of exchanging PSs or switching registrations.

[0004] In recent years, the quasi-public system has made it possible to use the private wireless network to receive the same service as that of the public wireless network even outside the area of the public wireless network.

[0005]

However, in the prior art described above, in order for the PS to have registration in both the private wireless network and the public wireless network, the PS must have a unique registration in the public wireless network. However, this is also operated in a private wireless network, and the impression that this is a function unique to the PS has become stronger. For this reason, there is one aspect that only the function of reflecting the information to the individual having the PS is provided.

Further, if many people try to use the same PS in both the private radio network and the public radio network, it is necessary to make a registration contract for all the PSs with the public radio network. In some cases, the proportion of costs such as basic fees can be very high, which can be economically inefficient.

[0007] The present invention has been made in view of such circumstances, and an object of the present invention is to allow a business or an individual who owns a plurality of privately owned PSs to establish a public wireless network for each of all PSs. N for m PSs without a registration contract and so that all PSs can use the public wireless network.
It is an object of the present invention to reduce the communication cost by constructing a system that enables public wireless network registration (where m ≧ n) of books.

[0008]

In order to achieve the above object, a digital cordless communication system according to the present invention comprises:
By having the digital cordless terminal registered in both the private wireless network and the public wireless network, the digital cordless terminal can use the communication regardless of whether it exists in the private wireless network communication area or the public wireless network communication area. The private wireless network allocates one public real number to one digital cordless terminal, and the public wireless network provides a group of one or more digital cordless terminals. Assign one public representative number,
In addition, one or more public real numbers and information related to the public real number are stored in correspondence with the public representative number, and all the digital cordless terminals in the group have the public representative number and the public real number stored therein. , The communication can be used in both the communication area of the private wireless network and the communication area of the public wireless network.

According to the digital cordless communication system of the present invention, when a digital cordless terminal is registered in a public wireless network, a plurality of digital cordless terminals storing a public representative number as a digital cordless terminal number are used. The public wireless network can be used on a first-come, first-served basis by the number of public real numbers stored in the public wireless network. Accordingly, if the number of public real numbers for the public wireless network is determined and contracted in accordance with the traffic used by the public wireless network, communication costs can be reduced. In addition, even digital cordless terminals that are not present in the private wireless network can be received with an extension image, so there is no need to be aware of the location of the other party.
It is possible to further improve the work efficiency.

[0010] In the digital cordless communication system according to the present invention, the public wireless network stores one or more public real numbers and information related to the public real numbers corresponding to the public representative numbers. When the digital cordless terminal performs location registration with a public wireless network, the digital cordless terminal transmits a public representative number as information content of a location registration request, and a public representative number notifying means, which is transmitted from the public wireless network. And a public real number allocation notification receiving means for receiving a public real number allocation notification, and a public real number allocation storing means for storing the public real number received by the public real number allocation notification receiving means.

Further, in the digital cordless communication system according to the present invention, the public wireless network may further include a location registration request transmitted from the digital cordless terminal when the digital cordless terminal performs location registration with the public wireless network. A public representative number recognizing means for recognizing that part of the information is a public representative number, a public real number empty detecting means for detecting whether or not a public real number corresponding to the public representative number has a free space; Location registration rejection means for sending a location registration rejection message to the digital cordless terminal when there is no free real number, and arbitrarily selecting from available free real numbers when there is a free real number. Means for selecting one number and changing the stored information of the public real number of the selected number during use; A public real number, a public real number allocation notifying means for notifying the digital cordless terminal that has transmitted the location registration request, and a digital cordless terminal that has issued the public real number allocation notification to the private wireless network having registration, Inter-network number assignment notifying means for transmitting the assigned public real number and the unique information of the digital cordless terminal;
And a public real number canceling means for receiving a public real number release notice and changing the storage information of the public real number corresponding to the release notice to empty.

Further, in the digital cordless communication system according to the present invention, the private radio network may include an inter-network number assignment notice receiving means for receiving an inter-network number assignment notice transmitted from a public wireless network, and an inter-network number assignment notice. Received by the receiving means,
An inter-network number assignment storage means for storing an assigned public real number and information unique to the digital cordless terminal.

Further, in the digital cordless communication system of the present invention, when the private wireless network receives a call to a digital cordless terminal whose extension has been registered, the digital cordless terminal that receives the call is presently used. A location registration confirming means for having a location registration in the public wireless network and searching whether or not a public real number is assigned from an inter-network number assignment storage; and a digital cordless terminal receiving an incoming call. If the location is not registered in the public wireless network, the extension transmitting means for performing normal extension transmission processing and the digital cordless terminal receiving the call are registered in the public wireless network, and An external line switching transmitting means for switching to an external line transmission to the allocated public real number when the number is allocated.

In the digital cordless communication system according to the present invention, when the private wireless network further requests a location registration from a digital cordless terminal having its own extension registration, the digital cordless terminal requests the location registration. Has a location registration on the public wireless network,
And a location registration confirmation means for retrieving whether or not a public real number has been allocated, from a storage of allocation of inter-network numbers;
If the digital cordless terminal that has requested location registration has not performed location registration on the public wireless network, the extension location registration means for performing normal location registration processing for the private wireless network and the digital cordless terminal that has requested location registration include: ,
If the location registration is performed on the public wireless network and a public real number is assigned, the public wireless network is notified to cancel the setting of the assigned public real number in use. If the public real number release notifying means and the digital cordless terminal that has requested the location registration have performed location registration on the public wireless network and a public real number has been allocated, the digital cordless An inter-network number assignment canceling unit for deleting data in the inter-network number assignment storage for the terminal and performing a normal location registration process with respect to the private wireless network.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a digital cordless communication system according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a digital cordless communication system according to the present invention. FIG. 1 shows a PS6 having a storage device 7 between a private wireless area 14 of a private branch exchange (hereinafter referred to as PBX) 1 and a public wireless area 15 of a public wireless network 2.
Shows a state in which. Moves freely.

That is, a PBX 1 exists in the private wireless network 13, a private wireless base station (hereinafter referred to as BS) 4 is connected to the PBX 1, and a private wireless area 14 is constructed by radio waves radiated from the BS 4. You. Also, PBX
An extension terminal 9 is connected to 1. In addition, PBX1
Has a storage device 12, and can register a plurality of PS6. PS6 with registration on private wireless network 13
Can be registered in the private wireless area 14,
Communication between other PSs registered in the private wireless network 13 and other wired terminals connected to the PBX 1 is possible.

When there is a connection between the wired public network 3 and the PBX 1, the connection between the wired public network 3 and the wired terminal 8 connected to the wired public network 3 and between the wired public network 3 and the PS 6 registered in the public wireless network 2. Communication is possible.

A public wireless base station (hereinafter referred to as CS) 5 is connected to the public wireless network 2, and a public wireless area 15 is constructed by radio waves radiated from the CS 5. The public wireless network 2 includes a main device 10 for control and a storage device 11, and a plurality of PSs 6 can be registered. PS6 registered in the public wireless network 2 is a public wireless area 1
5, location registration is possible, and communication with another PS registered in the public wireless network 2 and with a wired terminal 8 connected to the wired public network 3 is possible. When there is a connection between the wired public network 3 and the PBX 1, communication with the wired terminal 8 connected to the PBX 1 and communication with the PS 6 registered in the PBX 1 is possible.

A business or an individual who owns the PBX 1 can register the PS 6 in both the private wireless network 13 and the public wireless network 2 so that the PS 6 used in the private wireless network 13 can be used in the public wireless network 2. .

First, in the private wireless network 13, one PS
6 is assigned one extension number. Next, in the public wireless network 2, one public representative PS number is assigned to m (a positive number of m ≧ 1) PS groups required by the business or individual who owns the PBX 1.

Further, a business or an individual who owns the PBX 1 can make a registration contract with this PS group for n (n ≦ m positive number) lines as necessary, and The n public real PS numbers associated with the PS numbers are assigned and stored in the storage device 11 of the public wireless network 2. This is called public real number storage.

The PS 6 has a storage device 7 and can store the assigned public representative PS number and public real PS number. At this time, it is assumed that the public real PS number can be written and erased. This is called public real PS number assignment storage.

Here, assuming that the number of PS groups is k (k ≧ 1 positive number), the number of PSs for which the business owner or the individual who owns the PBX 1 requests registration is m × k (units). On the other hand, the actual number of lines that require a registration contract with the public wireless network 2 is n × k (books), and n ≦ m. Number is P
It turns out that it is less than the number of S.

Hereinafter, such a registration contract with the public wireless network 2 will be referred to as a group contract. When n = m, it is considered to be the same as the conventional registration contract method.

First, a procedure in the case where the group contracted PS 6 is used by entering the public wireless network 2 will be described.

FIG. 2 is a sequence diagram showing a procedure when a group-contracted PS performs location registration in a public wireless network in a public wireless area. Therefore, the procedure for the PS 6 to perform position registration in the public wireless network 2 within the public wireless area 15 will be described with reference to the block diagram of FIG. 1 and the sequence diagram of FIG.

The sequence from the link channel establishment request to the UA in the sequence between the PS 6 and the CS 5 in FIG. 2 is the same as the conventional sequence, and the description is omitted.

Further, in step 201, PS6 to C
The sequence for transmitting the location registration request to S5 is the same as the conventional one. However, conventionally, the PS number, which is one of the information contents of the location registration request, is conventionally used as a PS-specific number.
In the present invention, a common public representative PS number is stored in the storage devices 7 of all the PSs 6 under the group contract.
The difference is that this is transmitted to CS5. Of course, at this time, the ID is added to the public representative PS number and transmitted.

At the same time as step 201, in step 201a, the definition information request is transmitted from the PS 6 to the CS5, and in step 201b, the definition information request is transmitted from the CS 5 to the main unit 10 of the public wireless network 2. Since these are conventional sequences that are not directly related to the present invention, description thereof will be omitted.

Next, at step 202, the public representative PS number to which the ID has been added is notified to the main unit 10 of the public wireless network 2 by the public representative PS number notifying means. Then, in step 203, the main device 1 of the public wireless network 2
0 is the P notified by the public representative PS number recognition means.
It is determined whether or not the S number is a public representative PS number. If the notified PS number is not the public representative PS number, the process returns to the normal sequence in step 204.

On the other hand, the notified PS number is the public representative PS.
If the number is a public real PS
The number available detecting means searches the public real PS number stored in the storage device 11 and associated with the notified public representative PS number, and judges whether or not the public real PS number has a free space.

If the result of the search indicates that there is no vacancy in the public real PS number, step 206 causes
A position registration rejection message is transmitted to S6.

On the other hand, as a result of searching the storage device 11, if there is a vacancy in the public real PS number, at step 207,
After arbitrarily selecting one of the vacant public real PS numbers and changing the information of the public real number storage relating to this public real PS number during use and storing it, step 20 is executed.
8, the public real PS number is notified to CS5 as a public real PS number allocation notification, and further, step 208a
To the PS6.

At step 209, the PS6 that has received the public real PS number assignment notification stores the public real PS number in the storage device 7 of the PS6, and stores the PS number used in subsequent control and sequence in this public real PS number. Switch to PS number. However, when the mode of the PS 6 is changed to the location registration to the private wireless network 13, the PS number is returned to the public representative PS number. After performing the above sequence, the process returns to the normal sequence after the definition information response, and ends the location registration.

Then, if the location registration is successful, the main unit 10 of the public wireless network 2 notifies the wired public network 3 of the inter-network PS number assignment in step 210, and further, in step 210a, the PBX 1 Lever net P
An S number assignment notification is performed.

That is, the PBX owned by the business operator or the individual who has registered the location registration of the PS6.
1 by notifying the inter-network PS number assignment
In order to notify which PS is assigned which number, the PS-specific information and the assigned public real PS number are transmitted. In this case, any information may be used as the information unique to the PS as long as it can indicate the uniqueness of the PS.
The use of D is considered to be most suitable.

Next, the P which has received the inter-network PS number
In step 211, the BX 1 stores the information of the inter-network PS number assignment in its own storage device 12. This is called inter-network PS number assignment storage. After the sequence is completed in this way, it can be used as a normal public wireless network PS.

Next, the group contracted PS6 is transferred to the PB
An incoming call procedure when calling as an extension from the extension of X1 will be described.

FIG. 3 shows a group contracted PS.
FIG. 9 is a sequence diagram showing a procedure when calling from a PBX extension as an extension. Therefore, using the block diagram of FIG. 1 and the sequence diagram of FIG.
The procedure for calling as an extension from the extension side will be described.

First, in step 301, PBX1
Is received from the extension terminal 9 connected to the PBX 1 to the extension PS registered in the private wireless network 13 of the PBX 1, in step 302, the storage device 12 of the PBX 1
The PS position registration confirming means searches the data of the PS number allocation storage between networks and refers to the position registration information of the PS 6 to the public wireless network 2 to determine whether or not there is position registration.

If the extension PS to which a call is to be received has not been registered in the public wireless network 2, in step 303, a normal incoming call to the extension PS is performed.
Then, in step 306, the processing after the PBX 1 performs the normal extension transmission is performed according to the normal extension transmission sequence.

On the other hand, if it is determined in step 302 that the extension PS to which the call is to be received is currently performing location registration with the public wireless network 2, then in step 304, the outside line switching and transmitting means transmits the incoming call based on the ID. The previous number is converted to a public real PS number stored in the inter-network PS number assignment storage.
Then, in step 305, as an external line transmission, the P existing in the public wireless area 15 via the wired public network 3
Incoming call is made to S6. Subsequent processing follows a normal outside line transmission sequence.

Next, a description will be given of a procedure in the case where the group contracted PS 6 is used by moving from the public wireless area 15 to the private wireless area 14.

FIG. 4 is a sequence diagram showing a procedure in the case where a group-contracted PS moves from the public wireless area to the private wireless area and performs location registration in the private wireless network. Therefore, the procedure when the PS 6 is used by moving from the public wireless area 15 to the private wireless area 14 will be described with reference to the block diagram of FIG. 1 and the sequence diagram of FIG.

In the sequence between the PS 6 and the BS 4 in the figure, from the link channel establishment request to the UA is the same as the conventional sequence as in the case of FIG. Further, the sequence of transmitting the location registration request from the PS 6 to the BS 4 in step 401 is the same as the conventional one. However, in the location registration for the private wireless network 13, PS
The extension number is notified as the number. Step 40
At the same time as step 1, a definition information request is transmitted from the PS 6 to the BS 4 as step 401a.
As b, the definition information request is transmitted from the BS 4 to the storage device 12 of the PBX 1, but since these are conventional sequences that are not directly related to the present invention, the description is omitted.

First, at step 402, the extension PS
The number is notified from the BS4 to the PBX1. Then, in step 403, the storage device 12 of the PBX 1 stores the PS
The previous location registration confirming means retrieves data in the inter-network PS number assignment storage based on the ID, and refers to location registration information for the PS in the public wireless network 2 to determine whether or not there is location registration in the public wireless network 2. Judge.

If the extension PS performing location registration has not performed location registration with the public wireless network 2, that is, if there is no allocation to the public real PS number, step 4 is performed.
At 04, normal location registration processing is performed. Subsequent processing follows a normal extension calling / incoming call sequence.

On the other hand, if the extension PS performing location registration has performed location registration with the public wireless network 2,
If there is an assignment to the public real PS number, step 405a
In step 405b, the public real PS number release notifying means notifies the wired public network 3 of the release of the public real PS number, and further, in step 405b, notifies the public wireless network 2 of the release of the public real PS number. Do. Then, when the main device 10 of the public wireless network 2 receives the notification of the release of the public real PS number, in step 406, the public real PS number release means stores the public real PS number stored in the storage device 11.
The information of the public real number storage related to the number is changed from being used to empty.

After transmitting the public real PS number release notification to the public wireless network 2, the PBX 1 uses the inter-network PS number allocation releasing means to release the extension PS of the storage device 12 in step 407.
The data in the inter-network PS number assignment storage is deleted.

After performing the above sequence, the process returns to the normal sequence after the response to the definition information, and performs location registration.
The subsequent processing follows a normal extension calling / incoming call sequence.

[0051]

As described above, according to the digital cordless communication system of the present invention, when registering a location in the public wireless network, the public who registered and contracted with the public wireless network among the m PSs in the group contract. The public wireless network can be used for the n lines of actual PS numbers on a first-come, first-served basis. Thus, if n is determined and a registration contract is made in accordance with the traffic used by the public wireless network, the communication cost can be reduced. Also, if a PS that is not present in the private wireless area is currently registered in the public wireless area, the call can be received with an extension image, so that there is no need to be aware of the location of the other party. In addition, the operational efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a digital cordless communication system according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing a procedure in a case where a group contracted PS performs location registration in a public wireless network in a public wireless area in the embodiment of the present invention.

FIG. 3 is a sequence diagram showing a procedure when a group contracted PS is called as an extension from the PBX extension side in the embodiment of the present invention.

FIG. 4 is a sequence diagram showing a procedure in the case where a group contracted PS moves from a public wireless area to a private wireless area and performs location registration in a private wireless network in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 private branch exchange (PBX) 2 public wireless network 3 wired public network 4 private base station (BS) 5 public base station (CS) 6 digital cordless terminal (PS) 7, 11, 12 storage device 8 wired terminal 9 extension terminal 10 Main device 13 Private wireless network 14 Private wireless area 15 Public wireless area

Claims (6)

[Claims] A digital cordless terminal is registered in both a private wireless network and a public wireless network, so that the digital cordless terminal exists in any of the communication area of the private wireless network and the communication area of the public wireless network. However, in the communication system capable of utilizing communication, the private wireless network allocates one public real number to one digital cordless terminal, and the public wireless network has one or more Assigning one public representative number to a group of such digital cordless terminals, and storing one or more public real numbers and information related to the public real number corresponding to the public representative number; All the digital cordless terminals in the group, based on the public representative number and the public real number stored by themselves, A digital cordless communication system wherein communication can be used in both a communication area and a communication area of the public wireless network. 2. The digital cordless terminal according to claim 2, wherein said public wireless network comprises public real number storage means for storing at least one public real number and information related to said public real number corresponding to a public representative number. When performing position registration to the public wireless network, a public representative number notifying unit that transmits a public representative number as information content of the position registration request, and an allocation notification of a public real number transmitted from the public wireless network 2. A digital real-time system according to claim 1, further comprising: a public real number assignment notification receiving means for receiving the public real number assignment information; and a public real number assignment storing means for storing a public real number received by the public real number assignment notification receiving means. Cordless communication system. 3. The public wireless network further includes: when the digital cordless terminal registers a position in the public wireless network, a part of information of a position registration request transmitted from the digital cordless terminal includes: A public representative number recognizing means for recognizing that the public representative number is present, a public real number empty detecting means for detecting whether or not a public real number corresponding to the public representative number has an empty space; If not, a location registration rejection means for transmitting a location registration rejection message to the digital cordless terminal; and, if there is a vacancy in the public real number, arbitrarily assign one of the vacant public real numbers. Means for selecting and changing the stored information of the public real number of the selected number during use; registering the public real number selected by the public real number selecting means; A public real number assignment notifying means for notifying the digital cordless terminal which has transmitted the request, and a public real number assigned to the private wireless network having the digital cordless terminal which has issued the public real number assignment notification registered. Inter-network number assignment notifying means for transmitting information unique to the digital cordless terminal; public real number releasing means for receiving a public real number release notification and changing the storage information of the public real number corresponding to the release notification to free The digital cordless communication system according to claim 2, comprising: 4. The private radio network, comprising: an inter-network number assignment notice receiving means for receiving an inter-network number assignment notice transmitted from the public wireless network; and an assignment received by the inter-network number assignment notice receiving means. 4. The digital cordless communication system according to claim 3, further comprising an inter-network number assignment storage means for storing the assigned public real number and information unique to the digital cordless terminal. 5. The private wireless network further includes: when a digital cordless terminal whose extension is registered receives an incoming call, the digital cordless terminal receiving the incoming call registers a location in the public wireless network. Location registration confirming means for retrieving, from an inter-network number assignment storage, whether or not a public real number has been assigned, and a digital cordless terminal receiving an incoming call registers a location in the public wireless network. If not, the extension calling means for performing normal extension calling processing and the digital cordless terminal receiving the call have registered their location in the public wireless network and have been assigned a public real number. 5. A digital cordless digital cordless telephone according to claim 4, further comprising: external line switching transmitting means for switching to external line transmission for the assigned public real number. Communications system. 6. The private wireless network further comprises: when a digital cordless terminal having its own extension registration requests a location registration, the digital cordless terminal that has requested the location registration has been connected to the public wireless network. Location registration confirmation means for searching from a storage of the allocation of inter-network numbers to determine whether or not a public real number has been assigned, and the digital cordless terminal requesting the location registration, If the location registration has not been performed on the public wireless network, the extension location registering means for performing a normal location registration process for the private wireless network, and the digital cordless terminal that has requested the location registration registers the location with the public wireless network. Has been performed, and if a real public number has been assigned to the public wireless network,
A public real number release notifying means for notifying that the used setting of the public real number being used is released, and the digital cordless terminal which has requested the position registration has performed position registration with the public wireless network, and If the public real number has been assigned, the data in the network number assignment storage for the digital cordless terminal for which the location registration request has been made is deleted, and the internetwork number for performing the normal location registration processing for the private radio network. The digital cordless communication system according to claim 5, further comprising: an assignment canceling unit.