JP2006339938A - Important call preferential connection method and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an important call preferential connection method and a device therefor that can make call settings of an important call even if a VoIP network is congested with normal calls and also can make call settings one after another as sooo as a busy state ends even when an important call is made in the busy state. <P>SOLUTION: In the method of connecting an important call preferentially even in a congestion state during call connection processing of an application setting a session on the VoIP network, a plurality of call setup devices 12 and 22 exclusively for important calls are provided in important call reception contacts 13 and 23 of a police station and a firehouse; and the call setup device exclusively for important calls to be connected is previously registered on a terminal side and a connection request for an important call is sent to the call setting device 12 or 22 exclusively for important calls while a connection request for a call other than an important call is sent to a normal call setting device 11 or 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an important call priority connection method and apparatus for performing priority connection control for a predetermined recipient in call connection processing of an application for setting up a session including at least a telephone in an IP network.

VoIP (Voice over Internet Protocol) is a packet switching technique for transmitting voice over the Internet or an intranet using an Internet protocol. The current VoIP network mainly uses a protocol called SIP (Session Initiative Protocol).
In the following, Chimura, Murata: how to establish a call from user A to user C and from user B to user C will be described using a revised SIP textbook, Impress (see Non-Patent Document 1).

FIG. 4 is a configuration diagram of a conventional VoIP network.
In FIG. 4, user A is a public telephone network user. In the route (1) in FIG. 4, the user A makes a call to 050-CDEF-wxyz which is the telephone number of the user C (IP telephone). A number from 0 to 9 is inserted in each of C, D, E, F, w, x, y, and z. The public telephone network (2) routes calls by this number and connects to the gateway apparatus (3) of the IP telephone network.

  The gateway device (3) first makes an inquiry to ENUM DNS using 050-CDEF-wxyz (4). It is also possible for the gateway device (3) to route with the number (050-CDEF-wxyz), connect to the SIP proxy, and the SIP proxy inquires of the ENUM DNS. Actually, 050-CDEF-wxyz is changed to “z.y.x.w.F.E.D.C.0.5.1.8.e164.arpa” (C, D, E, F, w , X, y, and z represent numbers 0 to 9, which are converted from 050-CDEF-wxyz to FQDN, which is merely an example) and are queried.

The ENUM DNS returns a NAPTR RR containing “sip: userC@host.domain” to the gateway device (3) (5).
The gateway device (3) transmits an INVITE (session establishment request) message to the SIP proxy using “sip: userC@host.domain” (6).
The SIP proxy performs location server, DNS access, etc., obtains the IP address of user C, and sends an INVITE message to user C (7).
If the user C responds, a call is made between the user A and the user C ((1)-(2)-(3)-(6)-(7)).

  Next, when a call is made from user B (IP telephone) to user C (IP telephone), it is assumed that user B does not know the SIP URI of user C and knows only 050-CDEF-wxyz. Therefore, user B makes an inquiry to ENUM DNS using 050-CDEF-wxyz (8). As in the previous example, use “z.y.x.w.F.F.E.D.C. 0.5.1.8.e164.arpa”. The ENUM DNS returns NAPTR RR including “sip: userC@host.domain” to the user B (9). User B uses "sip: userC@host.domain" to send an INVITE message to the SIP proxy (10). The SIP proxy performs a location server, DNS access, etc., obtains the IP address of the user C, and sends an INVITE message to the user C (11). If user C responds, a call is made between user B and user C.

  ENUM can be used in the manner described above. However, the original ENUM has the concept of opt-in (selection), and the number of the other party to communicate with is not necessarily registered in the ENUM, and the telephone service URI is not necessarily registered. . In order to actually apply ENUM to IP phones including this, there are still some problems.

Chimura, Murata: Revised SIP textbook, Impress

As described above, as described in the background art, the conventional VoIP network has a problem that there is no mechanism for preferentially setting important calls such as police and fire fighters specially. This problem has a problem that it becomes difficult to connect to a congested state because even an important call is not prioritized.
Furthermore, in the telephone network, the location where the calling terminal is installed can be identified from the number, whereas in the VoIP network, it is not necessary to change the number by moving the terminal. There is a problem that cannot be identified.
In addition, when all calls to the conventional police are busy, if the receiving terminal waits without being cut off, the receiving terminal is connected as soon as it becomes available. There is a problem that no special mechanism is provided.

(the purpose)
An object of the present invention is to set up an important call even when a normal call is congested in a VoIP network. Also, even if a busy call is busy, It is an object of the present invention to provide an important call priority connection method and apparatus capable of sequentially setting up a call upon completion.

  In the important call priority connection method of the present invention, a call setting device dedicated to an important call is used in order to preferentially connect an important call even in a congested state. As a result, it is possible to prevent a call that is not an important call from affecting the call setting of the important call when the congestion state occurs.

  The means to solve the problem that the location of the caller cannot be specified is to install the above-mentioned important call dedicated call setting device for each unit of the important call reception desk of the police station and the fire department. Register important call-dedicated call setting device to be connected in advance, send a connection request to the important call-dedicated call setting device for important calls, and connect to a normal call setting device for calls that are not important calls Make a call. Since this important call dedicated call setting device can be connected only to a predetermined receiving terminal (a plurality of terminals), a normal call connection request cannot be made by the important call dedicated call setting device.

  In addition, when the police, the fire department, etc. are busy, the call setting device dedicated to important calls holds either the caller's address, number, or identifier. The call setup device dedicated to the call issues a connection request to the police, the fire department, and the caller, and the problem is solved by setting the call.

  According to the present invention, even when a normal call falls into a congested state, it is possible to set a call for an important call such as a police or a fire department. It is also possible to connect to a police station or fire station closest to the calling terminal. Further, even when the call is busy, as soon as the call is finished, the call can be set in the order of connection requests.

Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a block diagram of an important call priority connection apparatus according to an embodiment of the present invention.
Here, arrows connected to the police and fire fighters 13 and 23 indicate an important call flow, and arrows connected to the user indicate a normal call flow. Here, there are a domain (α) 10 and a domain (β) 20, and a normal call setting device (α) 11 and a call setting device (β) 21 are installed respectively. In addition, important call dedicated call setting devices 12 and 22 are installed for each region in the domain (region for each police and fire fighting unit). It is possible to connect to only 13 or 23 predetermined opponents.

Each user 1A, 2A, 3A, 4A is to send a connection request to the call setting devices (normal ones) 11 and 21 in the domain to which the user belongs for normal calls other than important calls. For important calls, the terminal is connected in advance to the important call dedicated call setting devices 12 and 22 in the area to which the terminal belongs.
Consider a case where the user 1A calls 13 important calls such as police and fire. When the user 1A calls the police, the terminal of the user 1A recognizes that the called party is the police from the number or address, and corresponds to the area to which the user 1A belongs instead of the normal call setting device 11 A connection request is made to the important call dedicated call setting device 12.
The important call-dedicated call setting device 12 in the region 1 determines whether or not the caller is a registered user in the region 1, and rejects the connection request if the caller is not a user in the region 1. If it is a user in region 1, connection processing is performed for a predetermined recipient, here the police 13 in charge.

Note that some areas may be processed together by a single important call setting device. In that case, determine whether the caller is from the relevant area, otherwise refuse the connection request, and if it is from the relevant area, send the connection request to any police. It is determined from the area of the caller registered in advance, and a connection request is made to the corresponding police.
The important call dedicated call setting devices 12 and 22 monitor whether or not a call has been set in response to the connection request, and continue if the call is lost when all the terminals on the receiving side are busy. The call connection request is continuously issued until the call is established. At this time, the connection is established from the earliest connection request from the user.
When a user terminal is newly installed, the user terminal sends a pseudo call to confirm whether the important call settings of the police, fire department, etc. are correct. Cannot be used including.
The location server of domain (β) 22 is a server having an address resolution function.

FIG. 2 is a block diagram of the important call dedicated call setting device in FIG.
First, when receiving a connection request packet from a caller, the caller search unit 1 uses the registered user data 2 to check whether or not the caller is an appropriate caller registered in advance. . If the caller is an appropriate caller, the address corresponding to the caller in the callee search unit 3 (for example, if the caller calls the police, the address of the police station having jurisdiction over the caller) The packet transmission unit 5 transmits a call connection request packet to the searched destination. At this time, it is confirmed whether or not the destination is included in the call waiting list data 4. If it is included in the call waiting list data 4, a new call is added to the call waiting list data.

When searching for a destination corresponding to the caller, the receiver search unit 3 searches for a destination corresponding to the caller using the region identifier in the connection request packet sent from the caller terminal. There is also a method of transmitting a call connection request packet from the packet transmission unit 5 to the searched destination.
If the caller is not appropriate, the request is rejected and a reply that the setting of the calling terminal is wrong is returned. Upon receiving this reply, the transmitting terminal issues an alarm and informs the user that the setting is incorrect.

  When the packet receiving unit 6 receives a packet indicating that the destination is busy, for each of the destinations, the transmission waiting list data 4 is set with one of the address, number, and identifier of the caller in the order in which the packet is received. Accumulate and continue to make call connection requests with the highest priority for each destination. As soon as the busy is finished, a connection request is made to the police, the fire department and the caller from the call setting device dedicated to important calls in the order of connection request, call setting is performed, and the call waiting list data 4 is deleted.

FIG. 3 is a block diagram of the calling terminal in FIG.
First, the user inputs a destination number and address using the destination input unit 31 shown in FIG. The input number or address is determined by the important call determination unit 32 as to whether or not it is an important call. If it is determined that the call is an important call, the sender's area identifier may be added to the outgoing packet. If the destination is not an important call, the transmission unit 34 transmits the call to a normal call setting device. When the destination is an important call, the transmission address changing unit 33 changes the call setting device to be transmitted to the address of the important call dedicated call setting device, and transmits from the transmission unit 34.

If the call connection fails, the continuous transmission unit 35 continuously issues a connection request.
If the setting of the transmission address changing unit 33 is wrong, the receiving unit 36 receives a packet informing that the setting is wrong from the call setting device, issues an alarm at the alarm transmission unit 37, and the setting is wrong. To the user.

It is explanatory drawing of the call setting method which concerns on one Example of this invention. It is a block diagram of the important call exclusive call connection apparatus in FIG. It is a block diagram of the user's transmission terminal in FIG. It is a network block diagram of a prior art.

Explanation of symbols

1: Caller search unit 2: Registered user data 3: Callee search unit 4: Call waiting list data 5: Packet transmission unit 6: Packet reception unit 10: Domain α
11: Call setting device α
12: Call setting device for important calls 13: Police, fire department, etc. 20: Domain β
21: Call setting device β
22: Call setting device dedicated for important calls 23: Police, fire department, etc. 31: Destination input unit 32: Important call determination unit 33: Transmission address changing unit 34: Transmission unit 35: Continuous transmission unit 36: Reception unit 37: Alarm transmission unit

Claims (10)

An important call priority connection method of an application for setting up a session including at least a telephone in an IP network,
When call setting is performed from a calling terminal, a dedicated call setting device is usually used for call setting of a plurality of predetermined recipients separately from a call setting device to be used. An important call priority connection method characterized in that only a call setup for a predetermined recipient is performed. An important call priority connection method of an application for setting up a session including at least a telephone in an IP network,
When call setting is performed from a calling terminal, a dedicated call setting device is usually used for call setting of a plurality of predetermined recipients separately from a call setting device to be used. An important call priority connection characterized in that a connection process is performed by judging a corresponding one of a plurality of callees set to the same number, address or identifier from the caller's number, address or identifier. Method. In the important call priority connection method according to claim 1,
The calling terminal determines whether it is a plurality of predetermined recipients or other recipients from the called party number or address or identifier, and if it is a predetermined recipient, An important call priority connection method characterized in that a call connection request is made to a dedicated call setting device, and in other cases, a call connection request is made to a normal call setting device. In the important call priority connection method according to claim 2,
The calling terminal determines whether it is a plurality of predetermined recipients or other recipients from the called party number or address or identifier, and if it is a predetermined recipient, An important call priority connection method characterized in that a call connection request is made by adding a caller's area identifier to a dedicated call setting device, and in other cases, a call connection request is made to a normal call setting device. In the important call priority connection method according to any one of claims 1 to 4,
The calling terminal continues to issue a call connection request until the connection is successful when the connection to the dedicated call setting device fails unless all the receiving terminals are busy. Important call priority connection method. In the important call priority connection method according to any one of claims 1 to 5,
When performing call setup from the calling terminal, normally, a call setup device dedicated to important calls is used for call setup of a plurality of predetermined recipients separately from the call setup device to be used.
The important call dedicated call setting device checks the caller's number or address or identifier, determines whether the caller is eligible for the predetermined callee of the dedicated call setting device, and In this case, the important call priority connection method is characterized in that the connection setting according to any one of claims 1 to 5 is performed, and if it is not qualified, the request is rejected. In the important call priority connection method according to any one of claims 3 to 6,
When the connection request from the call connection requesting device is rejected by the method of claim 6, the calling terminal issues an alarm and informs the user of the call connection requesting device to the call setting device dedicated to the important call. An important call priority connection method characterized by notifying that the setting is wrong. In the important call priority connection method according to any one of claims 1 to 7,
The call setting device dedicated to the important call stores the connection request in a memory when a call connection request is made when all terminals of a plurality of predetermined recipients are in use, and is used by the callee An important call priority connection method characterized in that, as soon as it becomes possible, connections are set in order from the earliest connection request. An important call priority connection device for executing a session setting application including at least a telephone in an IP network,
When a connection request packet is received from the calling terminal, the registered user data storage means is accessed to read out the caller's data and confirm whether or not the caller is an appropriate caller registered in advance. Caller search means;
As a result of the confirmation by the caller search means, if the caller is an appropriate caller, a callee search means for searching for a destination corresponding to the caller using a region identifier;
Packet transmission means for transmitting a call connection request packet to the destination searched by the called party search means;
Check whether the destination is included by the packet transmission means, and if it is included, call waiting list data storage means for adding the outgoing call to the call waiting list data;
When a packet indicating that the destination is busy is received, the address, number, or identifier of the caller is stored in the call waiting list data storage unit for each destination in the order in which the packets are received. And a packet receiving means for continuing to make a call connection request of the highest priority for each important call priority connection device. A calling terminal device that executes a session setting application including at least a telephone in an IP network,
Destination input means for entering the destination number and address,
Important call determination means for determining whether or not the destination input to the destination input means is an important call;
If the destination is not an important call, the number and address of the destination are transmitted as they are to a normal call setting device, and if the destination is an important call, the destination is converted to the address of the important call setting device. A transmission means for transmitting the received address;
A transmission address changing means for converting into an address of an important call dedicated call setting device;
A continuous transmission means for continuously requesting connection when call connection fails;
A receiving means for receiving, from the call setting device, a packet notifying that the setting is incorrect when the setting of the transmission address changing means is incorrect;
A transmission terminal apparatus comprising: an alarm transmission unit that issues an alarm to a user when receiving a setting error notification packet from the reception unit.

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