JP5736814B2 - Connection destination address acquisition terminal device, IP access network connection device, method and program, and traffic distribution system - Google Patents

Description

  The present invention relates to an IP access network connection technique, and more particularly to a traffic distribution technique.

  In recent years, a communication system using an IMS network (IP Multimedia Subsystem) standardized by 3GPP (Third Generation Partnership Project) has been proposed. Among them, for example, calls for safety confirmation are concentrated at the time of a disaster, the communication network is in an amplified state, and there is a case in which an important call such as an emergency call is not connected. Therefore, a communication system and the like for the purpose of reliably establishing an important call have been disclosed (for example, see Patent Document 1 and Patent Document 2). In addition, in the VoIP service (so-called IP phone) that transmits voice or the like in real time using the IMS network, various multimedia services such as a presence service can be implemented.

JP 2010-74769 A Special table 2009-544200

  However, for example, when implementing a presence service, frequent transmission / reception of SIP signals between the IMS terminal (UE) and the presence server is required, so that an increase in traffic greatly affects the VoIP service. It is assumed that

  An object of the present invention is to provide a technique for establishing a reliable connection by an IP access network, such as avoiding an influence on a VoIP service due to an increase in traffic.

  Each aspect of the present invention employs the following configurations in order to solve the above-described problems.

  A 1st aspect is related with a connecting point address acquisition terminal device. The connection destination address acquisition terminal device according to the first aspect receives a service connection request signal from the input unit, assigns a parameter corresponding to the service, and sets a connection destination address corresponding to the service connection request signal. A service request acquisition unit that transmits a response request to the address management server and acquires a connection destination address from the address management server, and a service start instruction unit that transmits the service start request signal to the acquired connection destination address. Prepare.

  The second aspect relates to an IP access network connection device. The IP access network connection device according to the second aspect includes a receiving means for receiving a connection request signal from a terminal, and a connection destination of the service corresponding to a parameter included in the service connection request signal from the terminal. Responding means for responding to the terminal with the address of the IMS network.

  The third aspect relates to an IP access network connection method. In the IP access network connection method according to the third aspect, a computer receives a service connection request signal from a terminal, and connects the service in response to a parameter included in the service connection request signal from the terminal. Including responding to the terminal with the address of the previous IMS network.

  The fourth aspect may be an IP access network connection program that causes a computer to implement any one of the above configurations, or a computer-readable storage medium that records such a program. .

  The fifth aspect relates to a traffic distribution system. The traffic distribution system according to the fifth aspect corresponds to a terminal, a receiving means for receiving a service connection request signal from the terminal, and a parameter included in the service connection request signal from the terminal, An IP access network connection unit having response means for responding to the terminal with the address of the IMS network to which the service is connected, and the terminal uses the IMS network address returned from the IP access network connection unit. Make a connection request.

  According to each of the above aspects, it is possible to provide a technique for reliably establishing a connection of each service call to the IP access network without being affected by other service calls.

The conceptual diagram which shows the system structural example of the IP access network connection apparatus in 1st Embodiment. The sequence diagram which shows the procedure of the communication protocol implemented between the terminal and DHCP server in FIG. The conceptual diagram which shows the system structural example of the traffic distribution system in 2nd Embodiment, and the service IMS network of the connection destination. The figure which shows the communication distribution image of the traffic distribution system in 2nd Embodiment. The sequence diagram which shows the procedure of the communication protocol implemented between the terminal in FIG. 3, and a DHCP server, and the implementation procedure of a service.

  Embodiments of the present invention will be described below. In addition, embodiment mentioned below is an illustration and this invention is not limited to the structure of the following embodiment.

  The IP access network connection apparatus according to the present embodiment corresponds to a reception unit that receives a connection request signal from a terminal (connection destination address acquisition terminal apparatus) and a parameter included in a service connection request signal from the terminal. Response means for responding to the terminal with the address of the IMS network to which the service is connected.

  In the IP access network connection device, information on the IMS network of the connection destination is transmitted to the terminal according to the service. Therefore, the terminal can connect to the IMS network corresponding to the service. Therefore, a reliable connection by the IP access network can be established without being affected by an increase in traffic.

  In addition, the traffic distribution system according to the present embodiment includes a terminal (connection destination address acquisition terminal device), receiving means for receiving a service connection request signal from the terminal, and a service connection request signal from the terminal. An IP access network connection unit having response means for responding to the terminal with the address of the IMS network to which the service is connected in response to the included parameter, and the terminal responds from the IP access network connection unit A connection request is made to the address of the IMS network. A terminal used in the traffic distribution system is a VoIP terminal. Therefore, it is possible to separate the IMS network for VoIP calls and multimedia service calls. Therefore, it is possible to reliably establish a VoIP call without being affected by a multimedia service call that requires frequent information notification and a large amount of data communication.

  Note that the terminals used in the IP access network connection device and the traffic distribution system according to each of the above embodiments are connection destination address acquisition terminal devices that receive service signals from an input unit such as a keyboard and support the services. The connection start address response request signal is sent to the address management server, the service address acquisition unit for acquiring the connection destination address from the address management server, and the service start to the acquired connection destination address. A service start instruction unit for transmitting a request signal. The service connection request signal transmitted from the terminal means a command signal for performing various services such as VoIP and multimedia services.

  Hereinafter, the details of each of the above-described embodiments will be described. The following first embodiment is an example in which the IP access network connection method is implemented by incorporating the above-described IP access network connection device into a relational database. The second embodiment is an example of a traffic distribution system incorporating an IP access network connection device. Note that the configurations of the above-described IP access network connection device and traffic distribution system are not limited to the following embodiments, and of course, IMS and communication devices and systems using an IMS network that provides VoIP and multimedia services. Any communication device or system using a network can be applied to various aspects.

[First Embodiment]
〔System configuration〕
FIG. 1 is a conceptual diagram showing a system configuration example of an IP access network connection device (hereinafter referred to as “IP access network connection unit 10”) in the first embodiment. The IP access network connection unit 10 in the first embodiment is connected to an IMS network 20 for various services.

  The IP access network connection unit 10 sets the address of the IMS server of the connection destination corresponding to the service from the DHCP server 12 and the UE 11 that transmits and receives an IP signal to and from the terminal (hereinafter simply referred to as “UE”) 11 that performs the service. And the IP access node 13 described with reference to FIG. UE11 is an IMS terminal for a user to perform various services. The DHCP server 12 receives the service connection request signal from the UE 11, refers to the address table 14 based on the parameters included in the connection request, and notifies the address of the service IMS network 20 to which the UE 11 should connect. Server (also serves as receiving means and responding means). Note that the DHCP server 12 may hold the address table 14 itself, or may provide a separate database storing the address table 14 and access the database to obtain an address. .

  Here, the UE 11 includes a service address acquisition unit 11a and a service start instruction unit 11b. The service address acquisition unit 11a assigns parameters corresponding to various services, accesses the DHCP server 12 that is an address management server, and acquires the connection destination address of the service. The service start instruction unit 11b transmits a service start request signal (SIP signal) to the acquired connection destination address. The service address acquisition unit 11a holds parameters corresponding to services in advance.

  The service IMS network 20 includes service servers 21 and 22 corresponding to various services. Each service server 21, 22 has a P-CSCF (Proxy Call Session Control Function) 23, 25, and the SIP signal is transmitted to various services via the P-CSCF to execute the service. The P-CSCFs 23 and 25 are session control servers that transfer the SIP signal from the UE 11 to each service as an access point. The servers 24 and 26 that have received the SIP signals transferred to the P-CSCFs 23 and 25 manage the services and cause the application servers (not shown) to execute various services. In FIG. 1, only two service servers 21 and 22 of the service IMS network 20 are shown, but three or more service servers may be provided corresponding to the number of services. Refer to 3GPP TS29.228 and TS23.167 for details of the function of each device.

[Operation example]
Next, referring to the sequence diagram of FIG. 2, the communication protocol executed between the UE 11 and the DHCP server 12 in FIG. 1 and the service of the service IMS network 20 to which the service address acquisition unit 11a of the UE 11 should connect are connected. The operation of the procedure for finding the servers 21 and 22 will be described. First, the UE 11 receives various service signals input from an external input unit 30 such as a keyboard, adds parameters corresponding to the service to start the service, and should connect to the DHCP server 12 Signal notification request for the addresses of the service servers 21 and 22 of the service IMS network 20 is performed (DHCP information-Request). In addition, it is the service address acquisition unit 11a that assigns a parameter according to a service to be performed by the UE 11 to the request and transmits the request to the DHCP server 12. This request signal is relayed via the IP access node 13 and received by the DHCP server 12 (DHCP Relay forward).

  The DHCP server 12 that has received the request signal to which the parameter is assigned refers to the address table 14 and detects the address of the IMS network corresponding to the service of each parameter. Next, the DHCP server 12 transmits a response signal to the UE 11 including the connection destination address (DHCP Relay Reply). This response signal is transmitted to the service address acquisition unit 11a of the UE 11 via the IP access node 13 (DHCP Reply). The service address acquisition unit 11a of the UE 11 that has received this response signal instructs the service start instruction unit 11b, and the P-CSCF (for example, the server 21) of the server (for example, the server 21) corresponding to the notified service connection destination address. For example, the SIP signal of the service is transmitted to the P-CSCF 23). The P-CSCF 23 that has received the SIP signal transfers the SIP signal as an access point to the application server 24 for service execution, and the application server 24 performs the service.

[Operation and Effect of First Embodiment]
As described above, in the IP access network connection unit 10, the DHCP server 12 distributes the UE 11 to the IMS network to which the UE 11 is connected in response to the service input by the input unit 30, so that frequent SIP signal transmission / reception is performed. A service with a high load such as performing the service does not affect other services. Therefore, for example, an important call or an emergency call is not affected by a service with a high load, and a reliable connection can be established.

[Second Embodiment]
In the second embodiment, a traffic distribution system using the IP access network connection device will be described. In the first embodiment, it is described that the SIP signal of each service is transmitted and executed by the service server 20 or the like according to the connection destination address information responded by the DHCP server 12. In the second embodiment, using the IP access network connection (IP access network connection device), more specifically, in the VoIP terminal, for example, a connection destination of a multimedia service with a high traffic load such as a presence service is specified. The purpose is to connect to a connection destination different from the connection destination of the VoIP service so as not to affect the VoIP service. The traffic distribution system 100 that distributes connection destinations between the VoIP service and the multimedia service will be described. Hereinafter, the traffic distribution system 100 according to the second embodiment will be described focusing on the contents different from the first embodiment, and the description of the same contents will be omitted as appropriate.

〔System configuration〕
FIG. 3 is a conceptual diagram showing a system configuration example of the traffic distribution system 100 and the service IMS network 200 to which it is connected in the second embodiment. FIG. 4 shows a traffic distribution system 100 and a service IMS network 200 that are designed to be easier to understand (however, the input unit 130 is omitted). As shown in FIGS. 3 and 4, the service IMS network 200 in the second embodiment includes, for example, a multimedia service IMS network 210, a VoIP IMS network 20, and the like.

  The traffic distribution system 100 according to the second embodiment includes a VoIP terminal (UE 111), a DHCP server 112 as an IP access network connection unit, an address table 114, an IP access node 213 described in FIG. 5, and the like. Has been. Since the IP access network connection unit is the same as that of the first embodiment, detailed description thereof is omitted. The UE 111 of the present embodiment is a VoIP terminal as described above, and the traffic distribution system 100 of the present embodiment requires frequent transmission / reception of SIP signals as well as the VoIP service using the VoIP terminal (UE 111). It also provides multimedia services (for example, presence services). Similarly to the first embodiment, the UE 111 receives a service connection request signal input from the input unit 130 such as a keyboard, assigns parameters corresponding to various services, and is a DHCP server that is an address management server. 112, the service address acquisition unit 111a that acquires the connection destination address of the service, and the service start instruction unit 111b that transmits a service start request signal (SIP signal) to the acquired connection destination address. Have

  The service IMS network 200 is a session control unit to which the UE 111 is to be connected. The multimedia service IMS network 210 in the service IMS network 200 is used for the multimedia service, and includes a P-CSCF 211, an S-CSCF (Serving Call Session Control Function) 212, an AS (Application Server) 213, and , HSS (Home Subscriber Server) 214 and the like. On the other hand, the VoIP IMS network 220 is used for a VoIP service, and includes a P-CSCF 221, an S-CSCF 222, and the like. As in this embodiment, the service IMS network 200 is divided into a VoIP service and a multimedia service, and P-CSCFs 211 and 221 and S-CSCFs 212 and 222 are installed in the IMS networks 210 and 220, respectively. HSS 214 and the corresponding service AS 213 are installed in the IMS network (S-CSCF 212 side).

  The S-CSCF 212 of the multimedia service IMS network 210 is a SIP session control server that manages the service by acquiring subscriber information from the HSS 214 and connecting to the AS 213. The AS 213 is an application server that implements multimedia services such as presence in the I multimedia service IMS network 210. The HSS 214 is a home subscriber server, which stores subscriber related information in a database, and performs authentication and authorization of whether the user of the VoIP terminal 111 is a subscriber. On the other hand, the S-CSCF 222 of the VoIP IMS network 220 is a SIP session control server that manages the VoIP service.

[Operation example]
Next, using the sequence diagram of FIG. 5, the communication protocol implemented between the UE 111 and the DHCP server 112 in FIG. 3 and the service IMS network (session control unit) 200 to which the UE 111 should be connected are discovered. The operation of the procedure until each service is implemented will be described. In the following description, it is assumed that a multimedia service is performed. First, when the UE 111 selects the start of the presence service of the multimedia service, the service address acquisition unit 111a of the UE 111 performs DHCP according to the procedure of 3GPP TS 23.228 (v9.4.0) 9.2.1. A connection request signal for the multimedia service IMS network 210 is transmitted to the server 112. That is, an address notification request signal is transmitted to the P-CSCF 211 (DHCP information-Request). At this time, the UE 111 gives a parameter for multimedia service to the request. This request signal is relayed via the IP access node 113 and received by the DHCP server 112 (DHCP Relay forward).

  When the DHCP server 112 recognizes that the parameter indicating the multimedia service is added to the address notification request from the UE 111, the address of the P-CSCF 211 of the multimedia service IMS network 210 is referred to the address table 114. To detect. Then, a response signal is notified to the service address acquisition unit 111a of the UE 111 including this address information (DHCP Relay Reply). This response signal is relayed via the IP access node 113 and received by the UE 111 (DHCP Reply). The service address acquisition unit 111a of the UE 111 that has received this response signal instructs the service start instruction unit 111b to make a connection request to the notified address destination network, that is, the P-CSCF 211 for multimedia service ( That is, as shown in FIG. 5, it is determined whether the service is a multimedia service. If “yes”, a connection request is made to the P-CSCF 211 for multimedia service). With this implementation, the multimedia service P-CSCF 211 that has received the SIP signal transfers the SIP signal to the multimedia service S-CSCF 212. In this way, authentication and authorization are performed in the HSS 214 via the S-CSCF 212, and call connection is established to the AS 213 that provides the corresponding service when permitted, thereby establishing a multimedia service call. To do.

  On the other hand, as shown in FIG. 5, if it is “no” in the determination of the multimedia service, since it is a VoIP call, a connection request is sent from the service start instruction unit 111 b of the UE 111 to the P-CSCF 221 of the IMS network 220 for VoIP. Is implemented. With this implementation, the VoIP P-CSCF 221 that has received the SIP signal establishes a VoIP call by transferring the SIP signal to the VoIP S-CSCF 222.

[Operation and Effect of Second Embodiment]
As described above, in the traffic distribution system 100, the VoIP IMS network 220 that controls VoIP and the multimedia service IMS network 210 that controls multimedia services are separated. That is, by distributing the traffic between the VoIP service and the multimedia service, the VoIP service is not affected by a highly loaded multimedia service that frequently transmits and receives SIP signals. Therefore, a VoIP call can be established reliably.

In the description of the above embodiment, a plurality of communication protocols are used, and a plurality of steps are described in order. However, the order of the plurality of steps is changed within a range that does not hinder contents. Can do. Further, the above-described embodiment and a plurality of modified examples can be combined within a range in which the contents do not conflict with each other.
Hereinafter, examples of the reference form will be added.
1.
A service connection request signal from the input unit is received, a parameter corresponding to the service is assigned, a response request for a connection destination address corresponding to the service connection request signal is transmitted to the address management server, and the address management is performed. A service address acquisition unit for acquiring the connection destination address from a server;
A service start instruction unit for transmitting the service start request signal to the acquired connection destination address;
A connection destination address acquisition terminal device comprising:
2.
Receiving means for receiving a service connection request signal from a terminal;
In response to a parameter included in the connection request signal of the service from the terminal, response means for responding to the terminal with an IMS network address to which the service is connected;
An IP access network connection device comprising:
3.
1. the service includes a VoIP connection service or a multimedia service; The IP access network connection device described in 1.
4).
Computer
Receive a service connection request from the terminal,
In response to the parameter included in the connection request signal of the service from the terminal, the IMS network address of the connection destination of the service is responded to the terminal.
An IP access network connection method.
5.
Computer
Receiving means for receiving a service connection request signal from a terminal;
Means for responding to the terminal with the address of the IMS network to which the service is connected in response to a parameter included in the connection request signal of the service from the terminal;
An IP access network connection program characterized by functioning as
6).
A terminal,
Receiving means for receiving a service connection request signal from the terminal; and
An IP access network connection unit comprising response means for responding to the terminal with an address of the IMS network to which the service is connected in response to a parameter included in the service connection request signal from the terminal; ,
The traffic distribution system, wherein the terminal makes a connection request to an address of the IMS network returned from the IP access network connection unit.

10 IP access network connection unit (IP access network connection device)
11, 111 UE (terminal, address acquisition terminal device)
11a, 111a Service address acquisition unit 11b, 111b Service start instruction unit 12, 112 DHCP server (reception unit, response unit, address management server)
20 IMS network for services (IMS network)
30, 130 Input unit (external device)
100 traffic distribution system 200 IMS network for service 210 IMS network for multimedia service 220 IMS network for VoIP

Claims (5)

A connection destination corresponding to the connection request signal of the service by receiving a connection request signal of one of the VoIP connection service and the multimedia service from the input unit, giving a parameter indicating that the service has been selected An address response request for transmitting an address response request to the address management server and acquiring the connection destination address from the address management server;
A service start instruction unit for transmitting the service start request signal to the acquired connection destination address;
A connection destination address acquisition terminal device comprising: Receiving means for receiving a connection request signal including a parameter indicating that one of the VoIP connection service and the multimedia service is requested from the terminal;
And responding means for selecting an address corresponding to the parameters included in the connection request signal of the service from the terminal, responsive to said terminal address said selected as the address of the destination IMS network of the service,
An IP access network connection device comprising: Computer
Receiving a connection request including a parameter indicating that one of the VoIP connection service and the multimedia service is requested from the terminal;
Select the address corresponding to the parameters included in the connection request signal of the service from the terminal, responsive to said terminal address said selected as the address of the destination IMS network of the service,
An IP access network connection method. Computer
Receiving means for receiving a connection request signal including a parameter indicating that one of the VoIP connection service and the multimedia service is requested from the terminal;
Select the address corresponding to the parameters included in the connection request signal of the service from the terminal, means responsive to said terminal address said selected as the address of the destination IMS network of the service,
An IP access network connection program characterized by functioning as A terminal,
Receiving means for receiving a connection request signal including a parameter indicating that one of the VoIP connection service and the multimedia service is requested from the terminal; and
Select the address corresponding to the parameters included in the connection request signal of the service from the terminal, IP access with a response means responsive to said terminal address said selected as the address of the destination IMS network of the service A network connection unit,
The traffic distribution system, wherein the terminal makes a connection request to an address of the IMS network returned from the IP access network connection unit.

Images