JP4663565B2 - IP session establishment method and routing processing apparatus - Google Patents

Description

  The present invention relates to an IP session establishment method and a routing processing device, and more particularly to a session establishment method for setting a connection on a network for an IP (Internet Protocol) telephone and a routing processing device used for implementing the method.

  The number of IP telephone subscribers has been increasing year by year due to the spread of the constant Internet connection through ADSL (Asymmetric Digital Subscriber Line) and FTTH (Fiber To The Home). An IP phone is used by connecting a general telephone to a home router device having a VoIP (Voice over Internet Protocol) function. The home router device is premised on an Internet connection, and all additional service functions such as VoIP are used. It is realized by communication control on the Internet.

  FIG. 8 shows a connection form of a conventional IP telephone. As shown in the figure, telephones 8-1 and 8-5 and personal computers 8-2 and 8- are connected to the local area network (LAN) side of the broadband routers 8-3 and 8-4 with VoIP function in the house. 6 and the like, and the wide area network (WAN: Wide Area Network) side of the broadband routers 8-3 and 8-4 with VoIP function is connected to an Internet line such as an optical line or ADSL. 1 and the telephone 8-5 make an IP call based on the VoIP protocol.

  FIG. 9 shows the configuration of a conventional broadband router with a VoIP function. In the figure, a VoIP unit 9-1 has a VoIP function for transmitting and receiving voice data on the Internet line, and enables IP calls. The LAN-side physical interface termination unit 9-2 terminates a LAN interface such as Ethernet (registered trademark) and is connected to a personal computer or the like.

  The router function unit 9-3 performs routing processing on packets input from the blocks of the LAN side physical interface termination unit 9-1, the VoIP unit 9-2, and the PPP termination unit 9-4, and uses the Internet via a broadband line. It has a function of a so-called general broadband router that can use the service simultaneously with a plurality of personal computers.

  The PPP termination unit 9-4 terminates PPP (Point to Point Protocol) connection with ISP (Internet Services Provider), and provides processing such as authentication and Internet connection. The WAN-side physical interface termination unit 9-5 terminates a WAN interface that conforms to the Ethernet (registered trademark) standard or the like.

  The voice quality of VoIP over the Internet is that the voice packet can always be sent out at a fixed interval by the broadband router with the VoIP function on the speaker side, or at the same interval by the broadband router with the VoIP function on the other side of the call Depends on whether voice packets can be received and played back.

  That is, the voice quality is deteriorated due to delay / fluctuation / discard or the like in the middle of transmission with respect to the transmitted voice packet. Since the VoIP system uses the Internet for transmission of voice packets, the system can be easily assembled. On the other hand, there is no guarantee regarding call quality.

  As a VoIP system that prevents a conversation from being interrupted, dropped out, or suddenly significantly distorted during a call over an IP network, for example, in Patent Document 1 below, a transmission VoIP terminal device uses an IP The traffic indicating the network congestion status is detected to determine whether or not transmission is possible, and based on the determination, transmission packets are thinned out at predetermined intervals and transmitted, and the receiving VoIP terminal device refers to the packet header information, and at predetermined intervals. A system for interpolating thinned packets is disclosed.

In addition, as prior art documents related to the present invention, in connection with IP address assignment of IP telephones, Patent Document 2 below describes a terminal information table for managing IP telephone terminals connected to a LAN and a plurality of IP addresses. When an execution request for a service related to exchange using a LAN occurs, it is determined whether or not an IP telephone terminal that is a request source or a request destination is stored in the terminal information table. When the corresponding IP telephone terminal is stored in the terminal information table, an available IP address is selected from a plurality of IP addresses stored in the IP address table, and the requesting or requesting IP telephone is selected. A network telephone system that can easily respond to requests to increase the number of telephone terminals connected to the network by assigning to terminals. It has been mounting.
JP-A-2005-294983 Japanese Patent Laid-Open No. 2003-8603

  Although IP telephones have advantages in call charges compared to current public switched telephone networks (PSTN) telephones, voice data is transmitted and received using the Internet as a base network. There are some problems in terms of quality / security. Therefore, the current situation is that the replacement of the telephone with the IP telephone by the general telephone switching network (PSTN) is not progressing.

  Conventional home router devices have an Internet connection function, and additional services such as VoIP are provided by Internet connection of home router devices. However, if the Internet connection cannot be normally performed due to a link down of the WAN side line such as ADSL or FTTH or a server failure for some reason, the additional service function such as VoIP cannot be used at the same time.

  For example, when making a VoIP IP phone call using an in-home router device with a VoIP function, VoIP communication allows voice data to flow over a normal Internet network. Until recovery, VoIP communication will not be possible at all. Further, since communication is performed using a public network, there is a possibility that a problem of communication quality deterioration due to delay / packet discard and a security problem such as packet data theft / falsification may occur.

  The present invention makes it possible to set up an IP telephone connection of a logical interface independent of a logical interface of the Internet network for a home router device connected to the WAN side by a single physical interface, and to prevent a failure of the Internet network. It is an object of the present invention to provide an IP telephone connection that is not affected and has little deterioration in communication quality due to delay / packet discard and the like and can ensure higher security.

  The present invention adds a logical interface for VoIP connection independent of PPP connection in Internet connection, and assigns an IP address different from that for Internet connection. Then, all the VoIP data is routed to the logical interface for VoIP by the internal routing table of the in-home routing processing device, and the Internet communication and the VoIP communication are made independent.

  That is, the IP session establishment method of the present invention allocates an IP address for Internet connection from a server provided on the Internet network side to the in-house routing processing device, and from a server provided on the IP telephone network side, Allocating an IP address for IP phone connection different from the IP address for Internet connection, and in the routing processing device, for the IP phone call packet, the IP address for IP phone connection is used. Performing routing processing toward the IP telephone network, and performing routing processing toward the Internet network using the IP address for Internet connection for data packets of Internet communication other than IP telephone call packets; Including a physical interface on one wide area network Against the face, and establishes an IP address and IP address and a plurality of different logical interface by session for Internet connection for IP telephone connection.

  The routing processing apparatus of the present invention includes an IP address for Internet connection allocated from a server provided on the Internet network side, and an IP address for Internet connection allocated from a server provided on the IP telephone network side. An IP address for IP phone connection different from the IP address is properly used. For IP phone call packets, the IP address for IP phone connection is used to perform routing processing toward the IP phone network, and the IP phone For the Internet communication data packets other than the call packets of the above, the IP address for the Internet connection is used to perform the routing process toward the Internet network, and the IP telephone is connected to the physical interface on the one wide area network side. IP address for connection and IP address for Internet connection Characterized by comprising means for establishing a plurality of different logical interfaces session with.

  According to the present invention, data for Internet communication such as a personal computer is communicated by a logical interface using an IP address for Internet connection, and data for IP phone connection is used for IP phone VoIP communication data. By performing communication using a logical interface based on an IP address, an IP telephone can be performed on a network independent of the Internet network, thereby providing a high-quality and safe IP telephone service.

  FIG. 1 shows a connection configuration example according to the present invention. This figure shows an embodiment in which the present invention is implemented using a broadband router (hereinafter referred to as a BB router) 1-1 having a routing processing function. As shown in the figure, a session on the Internet network side and a session on the VoIP network side are established as separate and independent sessions.

  To establish a session on the Internet network side, user identification information (ID) and password for PPPoE (PPP over Ethernet (registered trademark)) connection are transmitted from the BB router 1-1, and a broadband access server (BAS on the Internet network side) is transmitted. : Broadband Access Server) 1-3 authenticates the user identification information (ID) and password.

  When the authentication is established, a Radius (Remote Authentication Dial-In User Service) server 1-4 issues an IP address for Internet connection to the BB router 1-1, and the BB router 1-1 receives the IP address. To use the Internet connection to the Web server 1-5 and the like.

  On the other hand, in order to establish a session on the VoIP network side, for example, a DHCP (Dynamic Host Configuration Protocol) server 1-7 is installed on the VoIP network side, and an IP address for VoIP connection is set separately from that for Internet connection. 7 is paid out to the BB router 1-1.

  The BB router 1-1 directs the telephone call signal from the first telephone set 8-1 to the VoIP gateway 1-6 on the VoIP network side as a voice packet having the IP address for VoIP connection as a transmission source. For the data received from the personal computer 8-2, the routing process is always performed and sent out, and the Internet side broadband access server (BAS) 1-3 is used as a data packet with the IP address for Internet connection as the transmission source. Always send the routing process to the destination.

  As a result of the routing process of the BB router 1-1 described above, the layer 2 switch 1-2 in the communication station building on the WAN side connected to the BB router 1-1 by one physical interface receives voice packets from the IP phone. Then, switching is performed toward the VoIP gateway 1-6 of the VoIP network, and switching is performed toward the broadband access server (BAS) 1-3 on the Internet network side in response to the Internet data packet.

  FIG. 2 shows a configuration example of the routing processing apparatus according to the present invention. In the figure, the VoIP unit 9-1, the LAN side physical interface termination unit 9-2, the PPP termination unit 9-4, and the WAN side physical interface termination unit 9-5 are the same as those described in FIG. A duplicate description is omitted.

  The router function unit 2-1 has a function of a so-called general broadband router that can simultaneously use a broadband Internet connection with a plurality of personal computers, and receives voice packets input from the VoIP unit 9-1. The routing is always routed to the VoIP logical interface unit 2-2, and the packet input from the LAN side physical interface termination unit 9-2 is always routed to the PPP termination unit 9-4. Also, voice packets input from the VoIP logical interface unit 2-2 are always routed to the VoIP unit 9-1, and packets input from the PPP termination unit 9-4 are always routed to the LAN-side physical interface termination unit 9-2. To do.

  Here, the routing process is a layer that receives a layer 3 packet in which a destination IP address is stored, and assigns a MAC (Media Access Control) address of a transfer destination communication node of the packet based on the destination IP address. 2 packets are output.

  The VoIP logical interface unit 2-2 has an IP address for VoIP connection issued from the DHCP server 1-7 of the VoIP network, and a logical interface based on the IP address for VoIP connection is a PPP termination unit 9-4. Is formed with the VoIP network as an independent logical interface different from the logical interface with the IP address given to the network.

  3 to 7 show an embodiment of IP telephone session establishment according to the present invention. FIG. 3 shows an example of IP addresses and MACs assigned to each network device, FIGS. 4 and 5 show an operation flow of VoIP connection, and FIGS. 6 and 7 show an operation flow of Internet connection.

  As shown in FIG. 3, the MAC address “A” is assigned to the BB router 1-1, and the IP address “210.1.1.1” is assigned to the VoIP logical interface unit 2-2 from the DHCP server of the VoIP network. 2 ”, the IP address“ 10.0.0.100 ”of the primary DNS, the IP address“ 10.0.0.101 ”of the secondary DNS, and the IP address“ 210.1.1 of the VoIP gateway 1-6 ” .1 "is distributed.

  The BB router 1-1 has an IP address “30.30.30.10”, a primary DNS IP address “10.0.0.100”, and a secondary DNS IP address “10. It is assumed that 0.0.101 "is distributed.

  The VoIP gateway 1-6 is assigned an IP address “210.2.1.1” and a MAC address “B”, and the broadband access server (BAS) 1-3 is assigned an IP address “30.30. 30.1 ”, MAC address“ C ”is assigned, IP address“ 210.1.1.100 ”is assigned to the second telephone 8-5 side, and IP address is assigned to Web server 1-5. It is assumed that “100.100.100.100” is assigned.

  FIG. 4 shows an operation flow for establishing a session for IP telephone connection according to the present invention. As shown in the figure, when the power of the BB router 1-1 is turned on (step 4-1), the IP address “210.1.1.2” is sent from the DHCP server to the VoIP logical interface unit 2-2. ”, The primary DNS IP address“ 10.0.0.100 ”, the secondary DNS IP address“ 10.0.0.101 ”, and the VoIP gateway 1-6 IP address“ 210.1.1.1 ” "Is distributed (step 4-2).

  When dial transmission from the first telephone set 8-1 to the second telephone set 8-5 is performed (step 4-3), the VoIP unit 9-1 sends the calling VoIP packet to the destination address “210.1. 1.100 ”and source address“ 210.1.1.2 ”are created and passed to the router function unit 2-1 (step 4-4).

  The router function unit 2-1 determines that the packet from the VoIP unit 9-1 is a VoIP packet, and transfers the packet to the VoIP logical interface unit 2-2 (step 4-5). The VoIP logical interface unit 2-2 sends a MAC address to the IP address “210.1.1.1” of the VoIP gateway 1-6 in order to transfer the received voice packet to the VoIP gateway 1-6. A desired ARP (Address Resolution Protocol) packet is transmitted by broadcast (step 4-6).

  When the VoIP logical interface unit 2-2 receives a response that the MAC address of “210.1.1.1” is “B” from the VoIP gateway 1-6 (step 4-7), the VoIP logical interface unit 2 -2 is a destination MAC address: “B”, a source MAC address: “A”, a destination IP address: “210.1.1.100”, and a source IP address: “210.1.1.2” A call VoIP packet is generated and transferred to the layer 2 switch (L2SW) 1-2 (step 5-1).

  The layer 2 switch (L2SW) 1-2 looks at the destination MAC address “B” of the received packet and transfers the packet to the VoIP gateway 1-6 side (step 5-2). The VoIP gateway 1-6 looks at the destination IP address and transfers the packet to the VoIP server (step 5-3).

  The VoIP server 1-8 sees the destination telephone number and transfers the packet to the second telephone 8-5 side (step 5-4). The second telephone 8-5 receives the calling packet and rings a ringing tone (step 5-5). When the handset of the second telephone 8-5 is raised, the second telephone 8-5 transmits a response packet to the first telephone 8-1 (step 5-6). When the response packet is received on the first telephone set 8-1 side (step 5-7), the call can be started (step 5-8).

  Next, an operation flow for establishing a session for Internet connection will be described with reference to FIGS. As shown in FIG. 6, when the BB router 2-1 is powered on (step 6-1), the PPP termination unit 9-4 starts PPPoE discovery in order to search for a PPP authentication server ( A PADI (PPPoE Active Discovery Initiation) packet is transmitted by broadcast (step 6-2).

  The broadband access server (BAS) 1-3 responds by unicast to the PPP termination unit 9-4 (step 6-3). The PPP termination unit 9-4 makes an authentication request to the broadband access server (BAS) 1-3 using the user identification information (ID) / password for Internet connection set in the BB router 2-1. (Step 6-4).

  When the above authentication is established, the broadband access server (BAS) 1-3 sends an IP address “30.30.10.10” and a primary DNS IP address “10.0.0.0.” To the PPP termination unit 9-4. 100 ”and the IP address“ 10.0.0.101 ”of the secondary DNS are distributed (step 6-5).

  The Web server (“100.100.100.100”) is accessed from the personal computer 8-2 (step 6-6). The LAN-side physical interface terminator 9-2 generates an IP packet with the source IP address “30.30.10.10” and the destination IP address “100.100.100.100”, and the router function unit 2-1. (Step 6-7).

  The router function unit 2-1 determines that the packet from the LAN-side physical interface termination unit 9-2 is a packet for the Internet, and transfers the packet to the PPP termination unit 9-4 (step 7-1). The PPP termination unit 9-4 broadcasts the ARP to the IP address “30.30.30.1” in order to acquire the MAC address of the access server (BAS) 1-3 (step 7-2). .

  The PPP termination unit 9-4 receives a response indicating that the MAC address of the IP address “30.30.30.1” is “C” from the broadband access server (BAS) 1-3 (step 7-3). . The PPP terminator 9-4 has a destination MAC address: “C”, a source MAC address: “A”, a destination IP address: “100.100.100.100”, and a source IPIP address: “30.30.30. .10 ″ IP packet is generated and transferred to the layer 2 switch (L2SW) (step 7-4).

  The layer 2 switch (L2SW) sees the destination MAC address “C” and transfers the packet to the broadband access server (BAS) 1-3 side (step 7-5). The broadband access server (BAS) 1-3 looks at the destination IP address and transfers the packet to the Web server 1-5 (“100.100.100.100”) (step 7-6). The Web server 1-5 transmits data to the BB router 1-1 (Step 7-7).

It is a figure which shows the example of a connection structure by this invention. It is a figure which shows the structural example of the routing processing apparatus by this invention. It is a figure which shows the example of allocation of the IP address and MAC of the Example of this invention. It is a figure which shows the operation | movement flow of the VoIP connection of the Example of this invention. It is a figure which shows the operation | movement flow of the VoIP connection of the Example of this invention. It is a figure which shows the operation | movement flow of the internet connection of the Example of this invention. It is a figure which shows the operation | movement flow of the internet connection of the Example of this invention. It is a figure which shows the connection form of the conventional IP telephone. It is a figure which shows the structure of the conventional broadband router with a VoIP function.

Explanation of symbols

1-1 Broadband Router 1-2 Layer 2 Switch 1-3 Broadband Access Server 1-4 Radius Server 1-5 Web Server 1-6 VoIP Gateway 1-7 DHCP Server 8-1 First Telephone 8-2 Personal Computer 8 -5 Second telephone

Claims (4)

An IP address for Internet connection is allocated to a routing processing device in the home from a server provided on the Internet network side, and is different from the IP address for Internet connection from a server provided on the IP telephone network side. Assigning an IP address for IP telephone connection;
In the routing processing device, for IP phone call packets, the IP phone connection IP address is used to perform routing processing toward the IP phone network, and data for Internet communication other than IP phone call packets For a packet, using the IP address for Internet connection, performing a routing process toward the Internet network,
A method for establishing an IP session, comprising: establishing a plurality of different logical interface sessions based on an IP address for IP telephone connection and an IP address for Internet connection for a physical interface on one wide area network side. When allocating the IP address for Internet connection, after authentication of user identification information and password is established by a broadband access server (BAS) provided on the Internet network side, a Radius (Remote Authentication Dial-In User Service) server Allocate an IP address for Internet connection,
The IP address for IP telephone connection is allocated by a DHCP (Dynamic Host Configuration Protocol) server provided on the IP telephone network side when allocating the IP address for IP telephone connection. IP session establishment method. An IP address for IP phone connection allocated from a server provided on the Internet network side and an IP phone connection different from the IP address for Internet connection allocated from a server provided on the IP phone network side Use IP address properly
For IP phone call packets, the IP phone connection IP address is used to perform routing processing toward the IP phone network, and for Internet communication data packets other than IP phone call packets, Using the IP address for Internet connection, routing processing to the Internet network,
A routing process characterized by comprising means for establishing a session of a plurality of different logical interfaces based on an IP address for IP telephone connection and an IP address for Internet connection with respect to a physical interface on one wide area network side apparatus. A LAN-side physical interface termination unit, a VoIP unit having a VoIP function, a router function unit for performing routing processing, a VoIP logical interface unit, a PPP termination unit having a PPP connection termination function, and a WAN-side physical interface termination unit With
In the router function unit, the packet received from the LAN-side physical interface terminator performs routing processing toward the Internet network using the IP address for Internet connection, and passes through the PPP terminator to pass the WAN-side physical Means for transmitting from the interface termination;
In the router function unit, the packet received from the VoIP unit is subjected to routing processing toward the IP telephone network by using the IP address for IP phone connection, and through the VoIP logical interface unit, the WAN side physical interface Means for transmitting from the termination part;
The routing processing apparatus according to claim 3, further comprising:

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