WO2004075518A1 - Communication node, signaling network, communication network system, and communication method thereof - Google Patents

Abstract

At least, one or a plurality of communication applications and a session-initializing protocol managing server (SIP-MS) that is a server on SIP are provided such that a signaling processing on the SIP can be performed between the SIP-MS and the communication applications registered in the SIP-MS. The SIP-MS serves as a communication node (core communication node) given an address on the SIP (Key-SIP-URI). There is formed a signaling network comprising the core communication node and peripheral communication nodes. There is further formed a communication network system from the signaling network, the core communication node and an IP network. In the communication network system, the signaling processing on the SIP is performed, thereby establishing a session.

Description

 Communication node, signaling network, communication network system and communication method thereof

Technical field

 The present invention provides a communication node and signaling (application layer control) that can perform signaling processing in a session initiation protocol (hereinafter, referred to as “SIP”).

The present invention relates to a network, a communication network system, and a communication method thereof.

Conventional background

 In the conversion of communication networks to the Internet Protocol (IP), management and control functions such as end-to-end session establishment, termination, maintenance, and transfer, that is, IP signaling, are required between users. In addition, by transmitting information on the performance of communication nodes and various types of media content through IP sidanering, optimal multimedia communication between users can be realized. At present, SIP (SessionIninitiatiOnProtocol) is promising as the signaling protocol. SIP conforms to RFC 3261 (`` SIP: Session on Initiati on Protocol '', Ne rk rk World Group, Re qu est for Computers: 3261, Ob soletes: 2543> Category: Standards) Trac, June 2002).

SIP is a signaling (application layer control) protocol for establishing, modifying, and terminating a session with one or more parties. The sessions here are Internet calls, multimedia distribution, multimedia conferences, etc. Includes Allens. Since SIP only establishes, modifies, and terminates a session and does not relate to the contents of the session, it can coexist with other existing communication technologies and has excellent extensibility. Therefore, the following can be easily realized by using SIP.

 For example, realization of communication functions corresponding to general telephone functions such as hold / transfer (general telephone function), real-time message transfer (instant message function), SIP-URI (communication node in SIP) Of the other party's current presence status when the address of the other party is known (presence function), enabling access to the nearest communication node of the other party regardless of the current location of the other party And so on.

The SIP is described in detail in RFC3261 above, and will be briefly described below. It should be noted that even if there is a change in the SIP in the RFC standard, the SIP in the present invention can conform to the latest RFC unless there is a change related to the essence of the SIP.

 As a network element in SIP, there is a user agent (hereinafter referred to as "SIP-UA").

 SIP—UA is a logical entity that can operate as both a user agent client (hereinafter, rUACj) and a user agent server (hereinafter, ruASj). For example, IP provided by SIP—UA Telephones (hereinafter referred to as “SIP telephones.” Note that SIP telephones include SIP fixed telephones, SIP software telephones, and SIP mobile phones described later.)

 UAC is the logical entity that generates a new request, and UAS is the logical entity that generates a response to a request.

Here, a request is a SIP message sent from a client to a server to perform a specific operation, and a response is a client A SIP message sent from the server to the client to indicate the status of the request sent from the server to the server.

 SIP messages are data sent between SIP elements as part of SIP.

—Evening, either a request or a response.

 The server is a network element for receiving and processing a request and sending back a response to the request. The client is any network element for sending a request and receiving a response. Examples of servers include proxy servers, redirect servers, registration servers, and so on. However, the server does not have to implement all functions as a proxy server, a redirect server, and a registration server.

 A proxy server is an intermediate entity that acts as both a server and a client to make requests on behalf of other clients. Proxy

—The server also has a routing function. In other words, it plays the role of relaying, for example,-. Request 1 from UAS to other servers including UAS.

 The redirect server is a UAS that generates a 300s response to the received request. In other words, it has the role of receiving the request and notifying the sender of the current address of the receiver. For example, the UAC retransmits the request directly to the redirected server or to the address of the called party returned via the proxy server. A redirect server, unlike a proxy server, does not forward requests.

 The registration server is a server that accepts a REGISTER request and places the information received in the request in the location service of the domain it handles. That is, for example, a request to register the current address of UAC

(REGISTER request). The registration server typically runs on the same computer as the proxy server redirection server. In addition to the proxy server, redirect server, and registration server, a location server that accumulates registration information from the registration server and responds to the referral request of the called SIP-URI by the redirect server or proxy server should be provided. Is also possible.

SIP executes a command by specifying a method. A method is a

—The primary function that means that the request is invoked on the server, and is communicated by the request itself. Method types include I NV I TE, ACK :, BY E, CANCEL, OPTIONS, REG ISTER, and I NFO. The simple contents of the methods listed here are as follows.

 I NV I TE: Initiate a user call.

 ACK: Informs that a response to I NV I TE has been received.

 BYE: End the call.

 CANCEL: Cancels the I NV ITE request for which no response has been received.

 OPT I ONS: Queries server capability information.

 REG I STER: Register the current address of the user.

 I N F〇: Conveys information related to the session. The SIP has the following response code.

 Response numbers in the 100's are provisional responses indicating that the request has been received and is being processed, and are expressed as, for example, 100 Tryng, 180 Ringng, etc.

 Response numbers in the 200s are success responses indicating that the request was understood and accepted, for example, 200 200K.

Response numbers in the 300s will require further processing to complete the request This is a redirect response indicating that it is necessary, and can be expressed, for example, as 300 Mu1ti1e Choices, 301 Moved Permanently.

 A response number in the 400s is a client error response indicating that the request format is incorrect or cannot be processed by this server. For example, the response number is represented as 400BadRequest, 401Unautlhorid.

 Response numbers in the 500s are server error responses that indicate that the request processing at the server has failed, and are represented, for example, as 500 S e r v e r l u t e r n a 1 E r r o r, 501 Not Im p eme n t e d.

 Response numbers in the 600s are global error responses that indicate that the request cannot be processed by any server, and are expressed as, for example, 600 Bus Ev e r y w h e re, 603 D e c line.

Since SIP can establish and control sessions with many SIP-UAs, it is a protocol suitable for the operation of an integrated network in which multiple communication systems coexist. For example, when a calling user and a called user set up a call, if the Session Initiation Protocol Forking Proxy Server (SIP-FPS) is used, the called user is determined from the received I NV ITE request, If the called user has registered multiple communication nodes that can be used and communication applications in the communication nodes, it is possible to perform sequential or simultaneous transfer in parallel to each of them. Details of SIP—FPS are described in “G. Camparilo, SIP Demystifid, Chaptera5, McGraw—HiIl, 2002”.

The difference between the sequential transfer and the simultaneous transfer here will be described later in the example of FIG. Here, as an example, based on FIGS. 1 and 2, a communication system user (hereinafter, referred to as a user) uses a plurality of communication nodes and communication applications implemented in the communication nodes. When performing multimedia communication, 3 1 ??? ? The conventional communication system configuration via 3 and the communication steps (sidana ringing process) will be described as an example. Note that the SIP-FPS here has a function as a registration server.

 In Fig. 1, it is assumed that the calling user uses an IP fixed telephone equipped with SIP-UA (hereinafter referred to as “SIP fixed telephone”) (1) as a communication node. This SIP fixed telephone (1) shall be able to access the SIP-FPS (2) provided in the communication network (hereinafter referred to as the IP network) (13) based on the Inuichi Net protocol. The access method may be a wireless method or a wired method, but here, a wireless method is used.

On the other hand, the called user is an IP mobile phone equipped with SIP-UA as a communication node (hereinafter referred to as “SIP mobile phone”) (5), a mobile node such as a portable personal computer or a mobile information terminal (100). the a _¾ this thermopile node (100) in some communications applications SIP-instant messenger with a UA (hereinafter, referred to as "SIP-IM".) (3) and, SIP also a communication applique one Deployment — IP software phone with UA (hereinafter referred to as “SIP software phone”) (4) shall be implemented. To establish a wireless communication session between the calling user's SIP landline (1) and the called user's SIP software telephone (4) and perform two-way wireless communication, the following signaling process is used. It will be.

In the signaling processing in FIGS. 1 and 2, basically, the communication steps elapse from the upper side to the lower side, but the processing is not always performed one by one, but is performed in parallel. There are also steps. First, in order to initiate a call (call) to the called user, the calling user sends an I NV I TE request (hereinafter referred to as “I NV I TE”), which is a connection request message, to the IP network ( 13) SIP—Sent to FPS (2).

 The SIP of the IP network (13) that received the I NV I TE—The FPS (2) determines the called user from the contents of the I NV I TE, and the SIP mobile phone (5) and the SIP software phone that the called user has (4) For SIP—IM (3), I NV I TE is forked, and simultaneous transfer is performed in parallel (in FIG. 1, I NV I TE branch = 1, I NV I TE branch This corresponds to TE branch = 2, IVI TE branch = 3.) In this case, the expression “the receiving user has” means, more precisely, that it is registered in the SIP—FPS (2) of the IP network (13). I do. SIP — I M (3), SIP software telephone transferred forked I NV ITE

(4) Of the SIP mobile phones (5), the SIP mobile phone (5), which cannot communicate due to out of service area, etc., sends a client error response of 400s to SIP-FPS (2). In response, SIP—FPS (2) sends an ACK (corresponding to 404 notavailable AC K branch = 3 in FIG. 1). On the other hand, the called user can arbitrarily select from the available SIP software telephone (4) and SIP—IM (3) that have received the I NV ITE. The SIP software telephone (4) belonging to the common communication system with the SIP fixed telephone (1), which is the original communication node, is called, and the SIP software telephone (4) is selected. The provisional response and the success response are SIP_FPS. Sent to (2). Then, the SIP—FPS (2) sends the above response to the SIP fixed telephone (1), which is the source communication node of the I NV ITE (in FIG. 1, 180 ringing branch = 2, 180 ringi ng, 200 OK br an ch = 2, This is equivalent to 200 〇K. This processing is not always performed after the above-mentioned 400s client error response, and may be performed in parallel, for example. ). SIP—The SIP fixed telephone (1), which is the originating communication node receiving the response from the FPS (2), responds to the response, and the SIP fixed telephone (1) of the calling user and the SIP fixed telephone of the called user (1). A session is established with the software telephone (4), enabling two-way communication (equivalent to ACK: Media Session in Fig. 1). In addition, the communication node that has become unnecessary due to the establishment of the session, that is, the communication node that has not been selected, that is, in this example, the SIP-FP S (2) sends the I NV I TE to the SIP-IM (3) (Equivalent to CANCEL branch = 1, 2 0 0 OK branch = l, 48 7 cancelledbranch = 1, ACK branch = 1 in FIG. 1. Naturally, while this processing is performed, The session is still established, and two-way communication is performed.) In addition, in Fig. 1, the call (call) is terminated by a SIP request from the originating user's SIP fixed telephone (1). In the example shown in Fig. 1, a BYE is sent to the called user's SIP software telephone (4), and the called user's SIP software telephone (4) recognizes this and ends the session. , BYE, 200 OK.) Of course, the SIP software of the called user Towea phone

The session may be terminated by sending a BYE from (4).

The difference between the sequential transfer and the simultaneous transfer described above will be described. In the case of sequential transfer, in the above example, for example, only I NV I TE branch = 1 is transferred first, and the response is awaited. If the response is, for example, a client error response in the 400's, transfer INVITENch = 2 and wait for a response again. Simultaneous transfer means that I NV I TE branch = l, I NV I TE branch = 2, I NV I TE bra without waiting for a response from each communication node, etc. This means that nch = 3 is transferred in parallel and simultaneously. In addition, in order to be able to establish the session shown in Fig. 1 above, as shown in Fig. 2, the addresses of SIP mobile phone (5), SIP software phone (4), and SIP-IM (3) respectively Must be individually registered in the SIP-FPS (2) of the IP network (13) (corresponding to each REGIS item and 200 OK in FIG. 2). In other words, the SIP—FP S (2) of the IP network (1 3) has the function of a registration server, and the communication nodes and communication applications registered in the SIP—FP S (2) are The NV ITE is transmitted simultaneously in parallel.

 In REG ISTER, the registration time (retention period) is specified (in Fig. 2, it is the number (seconds) specified after Exp ires :), and within this registration time as necessary. Must be re-registered to the SIP P-FP S (2) of the IP network (1 3). Of course, re-registration may be performed once the registration time has elapsed without re-registering within the registration time. In Fig. 2, the registration time of SIP-IM (3) is 1800 seconds, the registration time of SIP software phone (4) is 600 seconds, and the registration time of SIP mobile phone (5) is 3600 seconds. The figure shows a part of how re-registration is repeated within the registration time. In such a communication system configuration and communication step (signaling process), the following problems occur.

In other words, first, it is necessary to register as many communication nodes and communication applications as the user has in the SIP-FPS of the IP network. In addition, for example, a SIP mobile phone also registers directly with the SIP-FPS of the IP network, so that the SIP mobile phone owned and carried by the user and another communication node (in the above example, the mobile node (100)) Correlation becomes sparse. That is, since each communication node or the like is individually registered, the concept of a communication node or the like owned by the same user becomes sparse. In addition, registration information typically includes

Since there is a retention period as shown in Fig. 2, each communication node must be re-registered one by one. Also, the signaling traffic between the SIP—FPS of the IP network and the user's communication node / communication application registered in this SIP—FPS depends on the number of the user's communication nodes / communication applications. Will do. Therefore, as the number of the communication nodes and communication applications increases, the request / response is made between the SIP—FPS of the IP network and the communication nodes and communication applications of the users who are not involved in session establishment. This raises the problem of increasing the traffic of the sidana ring. That is, in the above example, the SIP—FPS (2) of the IP network (1 3) and the SIP mobile phone that are unnecessary for session establishment

(5) There is a problem in that the signaling traffic with SIP-IM (3) occupies the communication access section between the IP network and the called user. Furthermore, in the above case, the SIP—FPS of the IP network is selected. Communication node 'Communication node other than communication application' If multiple requests are sent to communication application sequentially, network delay etc. On the other hand, in the case of simultaneous transmission, signaling processing becomes complicated, and for example, in the case of a commercial communication service, there is a possibility that charging may be duplicated.

Therefore, it is necessary to reduce signaling traffic in order to establish a session efficiently with limited radio frequency resources. Here, the case of the wireless access method has been described as an example, but the same problem also occurs in the case of the wired access method. In view of the above problems, an object of the present invention is to provide a communication node, a signaling network, a communication network system, and a communication method that reduce signaling traffic in a communication access section between an IP network and a user. . Disclosure of the invention

 The present invention that achieves the above object is as follows.

 The communication node of the present invention is capable of simultaneously transmitting at least one or a plurality of communication applications and at least a message in a session initiation protocol (hereinafter, referred to as “SIP”) to the communication application in parallel, In addition, the SIP address (hereinafter referred to as “CA—SIP-URIj”) of each communication application can be registered and deregistered freely. -MSJ) is implemented to enable SIP signaling processing between the SIP-MS and each communication application registered with this SIP-MS.

IP—MS is a communication node (hereinafter referred to as “core communication node”) characterized by being given an address in SIP (hereinafter referred to as “ey-SIP-URIJ”). The signaling network 1 of the present invention is a signaling network composed of a plurality of communication nodes. One of the communication nodes is a core communication node, and the core communication node and a communication other than the core communication node. A node (hereinafter referred to as a “peripheral communication node”) is capable of bidirectional communication, and the SIP—MS has CA—SIP-URI of each communication application and the peripheral Register and register the communication node's SIP address (hereinafter referred to as “CN-SIP-URI”). Recording can be unregistered, and the core communication node can perform SIP signaling processing between the SIP-MS and each communication application registered with the SIP-MS, and perform peripheral communication via the core communication node. Communication with the node enables SIP-MS signaling processing between the SIP-MS and the peripheral communication nodes registered with the SIP-MS. In addition, the SIP-MS has a Key- SIP-URI. Is given as a signaling network. A signaling network in which a plurality of core communication nodes are provided, and one key communication node SIP-MS and another key communication node SIP-MS KeyS IP-URI may be freely registered and deregistered. Further, a plurality of core communication nodes may be provided, and the Key-SIP-URI may be a signaling network capable of freely registering and deregistering between the SIP-MS of each core communication node. In addition, a communication network based on the Internet protocol (hereinafter referred to as “IP network”), capable of transmitting at least SIP messages, and registering and registering Key-SIP-URI A Session Initiation Protocol Proxy Server (hereinafter referred to as “SIP-PS”) that is a server that can be released, or at least a message in SIP can be transmitted simultaneously in parallel, and Key-SIP-URI The Key-SIP-URI is a signaling network with registration and deregistration at the Session Initiation Protocol Forking Proxy Server (hereinafter referred to as “SIP-FPS”), which is a server that can be registered and deregistered. It may be one. The communication network system according to the present invention comprises: SIP—PS and / or SIP An IP network comprising one or more FPSs; and one or more signaling networks and / or one or more SIs of the IP network as claimed in claim 5. 3 or 3 IP—FPS to SIP—MS Key—SIP—URI—In a communication network system consisting of a core communication node that can be registered and deregistered freely, the core communication node Two-way communication can be established between SIP—MS and SIP—PS or SIP—FPS, and SIP—PS or SIP—one FPS and this SIP—PS or SIP—FPS Key—SIP —A SIP-registered URI— A communication network system characterized by the ability to perform SIP signaling processing with an MS. The IP address of a communication node that does not constitute a signaling network (hereinafter referred to as a “general communication node”) can be freely registered and deregistered in the SIP-PS or SIP—FPS of the IP network. Is a communication network system capable of two-way communication between SIP-FPS and general communication nodes registered in this SIP-PS or SIP-FPS and capable of signaling processing in SIP. Good. In the IP network of the above communication network system, a session start protocol registration server (hereinafter, referred to as “SIP_R”) or a session start protocol location server (hereinafter, referred to as “SIP-LS”) or further a session start. A protocol redirection server (hereinafter referred to as "SIP-RS") may be provided. 'The communication method in the communication network system according to the present invention is the communication network system described above, wherein the source communication node transmits the key-key-SIP-URI. Sends a connection request message to the designated SIP—MS to the SIP—PS. Or SIP—FPS of the IP network, and then receives the SIP request of the IP network that received the connection request message. S or SIP—FP S sends the connection request message to the called SIP—MS if the SIP—MS Key—SIP—URI is registered in this SIP—PS or SIP—FPS. If the incoming SIP—MS Key—SIP—URI is not registered in the SIP PP or SIP—FPS of the IP network that received the connection request message, the other SI in the IP network is not registered. By transferring the connection request message to the P_PS or SI PF PS, the connection request message is sent to the specified receiving side SIP_MS via the IP network, and then to the above Upon receiving the connection request message, the called SIP—MS Using the CA-SIP-URI and CN-SIP-URI registered in the called-side SIP-MS, the connection request message is transmitted simultaneously to each communication application and peripheral communication nodes in parallel. From one communication application or peripheral communication node selected from each communication application or peripheral communication node to which the connection request message was sent, reversely via the communication path that the connection request message passed through from the communication application or peripheral communication node Then, a connection response message is transmitted to the source communication node, and the connection response message is received by the source communication node, so that the source communication node and the selected one communication association are transmitted. Or a communication method in a communication network system, characterized in that mutual communication is enabled by establishing a session with a peripheral communication node. And The source communication node is the core communication node, and a connection request message to at least the destination SIP-MS specified by Key-SIP-URI from the communication and application implemented in the source communication node Is sent to the source communication node's SIPMS so that one of the communication applications selected by the called A communication network system in which a session is established between the communication network and peripheral communication nodes to enable mutual communication. Also, the originating communication node is a peripheral communication node, and from this peripheral communication node, the peripheral communication node's CN—SIP-URI is registered to the core communication node SIP—MS in which the signaling network is registered. At least, by sending a connection request message to the called party SIP—MS specified by the Key—SIP—URI, the connection with one communication application or peripheral communication node selected by the called side is made. A communication method may be used in a communication network system in which a session is established between the communication networks to enable mutual communication. Further, in the communication method in the above communication network system, the source communication node may be a general communication node. In the communication method in the above communication network system, the IP network is provided with SIP-R or SIP-LS or further SIP-RS, and SIP-R is at least SIP-MS Key-SIP_URI and / or SIP-MS. Or, while receiving the registration of the address in SIP of the general communication node, the registration information of SIP-R is stored in SIP-LS, and the address from SIP-PS or SIP-FPS of the IP network is stored in SIP-LS. Or a SIP-LS can respond to a reference request for an address from a SIP-PS or SIP-FPS of an IP network via SIP-RS. It may be a communication method in a communication network system. BRIEF DESCRIPTION OF THE FIGURES Fig. 1 shows the IP network S when the user performs multimedia communication using multiple communication nodes and communication applications implemented in the communication nodes.

1 is a diagram showing an example of a conventional wireless communication system configuration and communication steps (signaling processing) via 1P-FPS. FIG. 2 is a diagram showing a state in which a communication node and a communication application are individually registered in SIP_FPS of an IP network in the conventional communication system configuration and communication steps shown in FIG. . Fig. 3 shows a communication system according to the present invention when a user performs multimedia communication via SIP-FPS using multiple communication nodes and communication applications implemented in the communication nodes. FIG. 3 is a diagram illustrating an example of a configuration and a communication step. FIG. 4 shows that in the communication system configuration and communication step of the present invention shown in FIG. 3, the communication node communication application is registered in the SIP-MS of the core communication node, FIG. 4 is a diagram showing a state in which a URI is registered in an IP network, a SIP—FPS of a network. FIG. 5 is a diagram showing one of the advantages of the signaling network of the present invention. FIG. 6 is a schematic diagram of a device configuration example of a core communication node in a signaling network. FIG. 7 is a conceptual diagram of a communication network system according to the present invention. FIG. 8 is a conceptual diagram of a communication method when an SIP network is provided with SIP-R and SIP-LS. Fig. 9 is a conceptual diagram of the communication method when SIP-R, SIP-LS and SIP-RS are provided in the IP network.

 The designated parts of the reference numerals are as follows. 1: SIP fixed line, 2: SIP—FPS,

2 ': SIP—MS, 3: SIP—IM, 4: SIP software phone, 5: SIP mobile phone, 6: Central processing unit, 7: Internal storage unit, 8: External storage unit, 9: Communication device Part, 10: communication control part, 11: protocol processing part, 12: address processing part, 13: IP network, 14: address storage area, 20: general communication node, 30: SIP-LS, 35 : SIP P_RS, 40: SIP—R, 50

: Signaling network, 100: Mobile node, 200: Core mopile node. BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments. The embodiments can be appropriately modified without departing from the spirit of the present invention. In addition, the specific configuration of the signaling network is usually configured according to the purpose of use and the environment of use of the user. This embodiment is not always the best one. Examples of the communication node in the present invention include a SIP fixed telephone, a SIP portable telephone, a PHS equipped with a SIP-UA, a pager, a portable information terminal, a personal computer, and other computers. On the other hand, examples of communication applications include a SIP software telephone, a SIP-IM, and a videophone equipped with a SIP-UA. Generally, a communication application is mounted on a communication node, and it is possible to send and receive SIP messages and communication data via this communication node. In the present embodiment, the core communication node is a mobile node such as a portable personal computer or a portable information terminal (hereinafter, referred to as a “core mopile node”) (200). In order to easily compare the core mopile node (200) with the mopile node (100), the core mopile node (200) communicates with the SIP software telephone (4), which is a communication application, similarly to the mopile node (100). It is assumed that the application SIP—IM (3) is implemented. In addition, the core mopile node (200) has at least a SIP message to SIP-IM (3) and SIP software telephone (4). That can simultaneously send messages in parallel, and that can register and deregister the SIP addresses (CA—SIP—URI) of the IM (3) and SIP software-to-telephone (4) — MS (2 ') is implemented. The SIP-MS here is a server as software. The SIP-MS (2 ') can perform signaling processing in SIP between the SIP-IM (3) and the SIP software telephone (4). ') Has one SIP address (KeySIP-URI). The SIP-MS (2 ') has a function as a registration server. In this embodiment, the SIP-IM (3)' CA-SI P-URI of the SIP software telephone (4) is registered. I have. SIP-MS is basically a server that has the same function as SIP-FPS, but SIP-MS itself is provided with Key-SIP-URI, which is the IP-network SIP-PS or SIP. -It is different from SIP-FPS in that it is registered in FPS. This will be described later. The peripheral communication node is a SIP mobile phone (5). This SIP mobile phone

The address (CN-SIP-URI) in the SIP of (5) shall be registered in the SIP-MS (2 ') of the core mopile node (200). The peripheral communication node is not limited to the SIP mobile phone (5), but may be a SIP fixed telephone or the mobile node (100) described above. The general communication node (20) corresponds to a SIP fixed telephone, a SIP mobile telephone, a PHS with a SIP-UA, a pager, a personal digital assistant, a personal computer, and other computers. The core communication node and peripheral communication nodes shall be capable of two-way communication. That is, the core communication node and the peripheral communication nodes are configured to be mutually accessible, The access method may be a conventionally known wireless / wired method. For example, wireless communication standards include Bluetooth and wireless LAN (IEEE 802.11a, IEEE 802.11b, etc.). In the case of wired communication, there are, for example, Ethernet cables (IEEE 802.3i10BASE-T, IEEE802.3u1OOBASE-TX, etc.). In the present invention, there is no particular limitation as to whether the communication means is wireless or wired, and any of these may be used, or a combination thereof. The same applies to the following.

 As described above, the core communication node and the peripheral communication node can communicate with each other. By this communication, the SIP-MS of the core communication node and the SIP-based sidanering process between the peripheral communication node and the peripheral communication node are performed. Becomes possible. As described above, the signaling network is composed of the core communication node and the peripheral communication nodes in which the CN-SIP-URI is registered in the SIP-MS of the core communication node.

Note that the CN-SIP_URI of the peripheral communication node does not always have to be registered in the SIP-MS of the core communication node, but can be deregistered as appropriate in the user's usage environment. Therefore, there is a case where no CN-SIP-URI of the peripheral communication node is registered in the SIP-MS of the core communication node. Even in such a case, it can be safely referred to as a signaling network in a broad sense. This is because, in general, from the practice of referring to a configuration consisting of multiple physical entities as a network, if no peripheral communication node is registered and only one core communication node is registered, this is called a network. However, as described above, the implementation of SIP-MS in the core communication node allows software to communicate with the communication application implemented in this core communication node. This is because the signaling network in is formed. In other words, In other words, the core communication node has a software signaling network formed inside it, while the core communication node and the peripheral communication node are between the core communication node and the peripheral communication node. This is because it can be said that a hardware ringing network is formed. However, in the text, in order to avoid confusion of terms, a single core communication node will not be called a signaling network but simply a core communication node. There is no requirement that there be one core communication node in a signaling network. In a signaling network, there may be more than one core communication node. In this case, one of the plurality of core communication nodes is positioned as the main core communication node, and the SIP—MS of the main core communication node is replaced with the SIP—MS Key of the other sub core communication node. -SIP-URI may be registered, or multiple core communication nodes do not distinguish between master and slave, and core communication node SIP-MS Key-SIP-URI are mutually registered You may do it. The SIP-MS Key-SIP_URI of the signaling network's core communication node and the single core communication node shall be registered in the SIP-PS or SIP-FPS of the IP network described later.

The IP network is an Internet protocol network that can be accessed from the signaling network of the present invention, a core communication node, a general communication node, a communication network such as a LAN, and a network. The IP network is provided with a Session Initiation Protocol Proxy Server (SIPPS) or a SIPFPS. ' The SI? _? 3 or 3 IP-FPS provided in the IP network can communicate with the signaling network, the core communication node, the general communication node, and other communication networks such as LANs according to the present invention. A conventionally known wireless / wired system may be used. For example, in the case of a wired system, a conventionally known communication method using an optical cable capable of high-speed and large-capacity communication may be used.

 In this way, the mutual communication allows the SIP network or SIP—FPS of the IP network to communicate with a single core communication node, the SIP-MS of the signaling network, and the general communication node. This enables SIP signaling processing.

 A plurality of SIP-FPS or SIP-PS provided in the IP network can communicate with each other, and the method may be wireless or wired.

 The SIP PP S or SIP P-FP S of the IP network., Single core communication node SIP—MS Key—SIP—URI, core communication node SIP—MS Key that constitutes the signaling network—MS Key — SI P-UR I, general communication

—The SIP address of the server is registered. This registration can be released by the user. As described above, a communication network system is formed from an IP network and one or more signaling networks, core communication nodes, and general communication nodes in a mutually communicable configuration (Fig. 7). See). One KeySIP-URI is given to the SIP-MS of the core communication node. This Key—SIP_URI plays the same role as the main telephone number of a general line telephone. This will be clarified by the signaling process described later. Here, referring to FIG. 6, an outline of a device configuration example of a core mopile node (200), which is a core communication node configuring a signaling network, is shown. The core mopile node (200) has a central processing unit (6), an internal storage device

 (7), external storage device (8), communication device section (9).

 The communication equipment section (9) enables mutual communication with the IP network (13) and peripheral communication nodes, in this case, SIP mobile phones (5). For example, terminal adapters, DSU (Digital Service Unit) ), A modem, etc. are provided as appropriate. The information from the IP network (13) obtained by the communication device section (9), for example, information such as SIP messages, is shared by the central processing unit (6) with the internal storage device (7). And is processed. Central processing unit

 (6) includes a communication control unit (10), a signaling processing unit (1 1), and an address processing unit (1 2). The address storage area (14) provided in the external storage device (8) can store and store addresses such as CA-SIP-URI for communication applications and CN-SIP-URI for peripheral communication nodes. In addition, the external storage device (8) stores and stores software applications such as SIP-IM (3) and SIP software-to-air telephone (4). —MS (2 ') is stored and stored.

The address processing unit (1 2) acquires the addresses stored in the address storage area (14), such as the communication application CA—SIP-URI and the peripheral communication node CN—SIP-URI. Reference processing is performed, and further information such as a connection request message from the IP network (13) acquired via the communication device section (9) is transmitted by the signaling processing section (11). , For example, in this case, SIP—IM (3), SIP software phone (4), and SIP mobile phone (5). Signals sent in parallel Is performed. The communication control unit (10) controls the communication device unit (9) according to the signaling processing. And the communication equipment section

 Through (9), information such as the connection request message that has been signaled is transferred to an IP network (13) or a SIP mobile phone (5). Where they are sent. Next, a communication step (signaling process) in the communication network system according to the present invention will be described with reference to FIGS. In FIGS. 3 and 4, in order to facilitate comparison with FIGS. 1 and 2, and to clarify the effects of the present invention, the originating user is a SIP fixed telephone as a general communication node.

 (1) shall be used. The SIP fixed telephone (1) can access the IP network (13). The access method may be a wireless method or a wired method, but here, the wireless method is used.

 On the other hand, the called user's signaling network (50) has, as communication nodes, a SIP mobile phone (5) as a peripheral communication node and a core mobile node (200) as a core communication node. Note '(200) implements SIP-IM (3) with SIP-UA, a communication application, and SIP software telephone (4) with SIP-UA, also a communication application. And Furthermore, the above-mentioned SIP-MS (2 ') is implemented in the core mopile node (200). The IP network (13) shall have SIP-FPS (2).

The following signaling process is used to establish a wireless communication session between the calling user's SIP landline (1) and the called user's SIP software phone (4) to perform mutual communication. . First, the calling user initiates the call by calling the SIP—MS of the core mopile node (200) in the called user's signaling network (50).

(2 ') is designated by its Key-SIP-URI, and the connection request message I NV I TE is transmitted to the source communication node, the source SIP fixed telephone.

Sent from (1) to SIP—FPS (2) on IP network (1 3). In addition, not only I NV ITE but also communication data such as text data may be transmitted.

 The SIP—FPS (2) of the IP network (13) converts the received I NV I TE into a called signaling network to which the Key—S IP—UR I is assigned.

It will be sent to the SIP-MS (2,) of the core mopile node (200) of (50).

The SIP—FP S (2) of the IP network (1 3) that received the I NV I TE is added to the SIP—FP S (2) by the SIP—MS of the core mobile node (200) of the called side signaling network (50). If the Key-SI P-UR I of (2 ') is registered, the received I NV I TE is stored in the SIP-MS of the core mopile node (200) specified by the Key-SIP-UR I (2 ') is transmitted by radio. However, the Key—SIP—URI of the SIP-MS (2 ′) of the core mopile node (200) of the called signaling network (50) is registered in the SIP—FPS (2) of the IP network (1 3). If not, the SIP-FPS (2) of the IP network (13) transmits the I-Request of the connection request message to the other SIP-FPS or SIP-PS of the IP network (13). Transfer NV ITE. Then, the SIP—MS (2) of the core mobile node (200) of the called side signaling network (50) that is the connection request target of the transferred IP network (13) SIP—FPS or SIP PPS. ') Is registered, this SIP—PS or SIP—FP S Send I NV I TE to force SIP-MS (2 '). The SIP-MS (2 ') of the core mopile node (200) that has received the request I NV ITE as a connection request message is a SIP mobile phone (5) registered in the SIP-MS (2'), SIP software telephone (4), SIP P-IM

 For (3), I NV I TE is forked, and simultaneous transmission is performed in parallel (in FIG. 3, I NV I TE branch = 1, I NV I TE branch = 2, I NV I TE branch = 2, Equivalent to TE branch = 3.). Among SIP mobile phones (5), SIP soft phone phones (4), and SIP—IM (3) to which the branched I NV I TE was sent, the SIP mobile phones that are unable to communicate due to out-of-service areas (5) Sends a 400s client error response to the SIP-MS (2 ') of the core mopile node (200),

(2 ') recognizes this and transmits ACK (corresponding to 404 notavai1a1e, ACKbranch = 3 in FIG. 3). On the other hand, the receiving user receives the I NV ITE and receives the available communication node and the communication application, that is, the SIP software telephone (4) in the core mobile node (200) and the SIP—IM (3). ) Can be selected arbitrarily. Here, a SIP software telephone (4) belonging to a common communication system with the SIP fixed telephone (1) is called (in Fig. 3, 180 ringing branch = 2. SIP on IP network (13) —FPS (2) and core mopile node

This is equivalent to 180 r ng i ng between (200) and S IP — MS (2 ′), and 180 r ng i ng between S IP — FP S (2) of the IP network and the source S IP fixed telephone (1). ) This SIP software phone

It is assumed that (4) has been selected. SIP—MS of the core mobile node (200) that received a successful response from the selected SIP software phone (4)

From (2 '), the success response indicates that the connection request message was sent. The call is sent to the source SIP fixed telephone (1), which is the source communication node, via the reverse route (200 OK branch = 2 in Fig. 3, SIP—MS (2) of the core mopile node (200) ') And 200 OK between SIP of IP network (13) —FPS (2) and 200 OK between SIP of IP network (1 3) —FPS (2) and source SIP landline (1) )). The source SIP fixed telephone (1) that receives the response from the SIP software telephone (4) selected in the called signaling network (50) is the SIP software telephone selected in the called signaling network (50). The session is established by replying to (4), and mutual communication becomes possible. (In Fig. 3, it corresponds to ACK, Media Session.) Note that the above signaling processing does not necessarily have to be performed after the processing of client error responses in the 400s has been performed, and may be performed in approximately parallel.

 In addition, for the communication application that has become unnecessary due to the establishment of the session, that is, the communication application that has not been selected, that is, for the SIP—IM (3) in this example, the SIP—MS (of the core mobile node (200)) 2 ') transmission of I NV I TE is canceled (in Fig. 3 .. CANCEL branch = 1, 200 OK branch = 1, 487 can celled branch = 1, ACK branch = 1) As a matter of course, while this process is performed, the session establishment is continued, and two-way communication is performed.) In addition, in the case of terminating the call (call), FIG. The calling user's SIP landline (1) sends a request, BYE, to the called user's SIP software phone (4), which recognizes this and the session is terminated. Shows an example of ending In FIG. 3, BYE, 200

Equivalent to 〇K. ). Of course, from the called user's SIP software phone (4)

It is also possible to send a BYE to end the session. As shown in Fig. 4, the SIP mobile phone (5), the SIP software phone (4), the SIP-IM (3 ) Addresses are individually the core mopile nodes

(200) is registered in the SIP—MS (2 ') (corresponding to each REGISTER EXpires: item and 200 OK in FIG. 4). On the other hand, the SIP—FPS or SIP—PSS of the IP network (13) (the SIP—FPS (2) in the above embodiment) has the SIP—MS of the core mopile node (200).

(2 ') Key-SIP-URI is registered.

In the REG ISTER request, the registration time (retention period) is specified (in Fig. 4, it is the number (seconds) specified after Ex ires :), and if necessary, the registration time is specified. Must be re-registered within Of course, re-registration may be performed once the registration time has elapsed without re-registering within the registration time. In Fig. 4, the registration time of SIP—IM (3) is 1800 seconds, the registration time of SIP software phone (4) is 600 seconds, the registration time of SIP mobile phone (5) is 3600 seconds, and SIP—MS (2 '). The registration time of) is 3600 seconds, and shows a part of the situation where re-registration is repeated within the registration time. Unlike the registration shown in FIG. 2, in the present invention, the RE GISTER request to the SIP—FP S (2) of the IP network (13) is sent to the SIP—MS (2) of the core mopile node (200). ') Only. In the signaling network (50), the REGIS TER request for SIP-IM (3), SIP software telephone (4), and SIP mobile phone (5) is based on the SIP-MS (2 ') of the core mopile node (200). Made against. In this way, the transmission of SIP messages to establish a session and the communication network of the user to the SIP-PS or SIP-FPS of the IP network. The signaling process, such as registration of a network, is performed between the SIP—PS or SIP—FPS of the IP network and the SIP—MS of the user's core communication node or the SIP—MS of the signaling network. It is considered in between. Therefore, the address (CN—SIP_URI, CA—SIP—URI) of each communication node and communication application of the user can be registered with the SIP—PS or SIP-FPS of the IP network one by one, It is no longer necessary to send SIP messages from the SIP—PS or SIP—FPS of the network to all communication nodes / communication applications of the registered user (in this sense, SIP— The MS's Key_SIP-URI is similar to the main telephone number of a general line telephone, and serves as the main number of the Sidana ring network.) Signaling traffic in the communication access section of the system is always minimized. In the above embodiment, the connection request message is transmitted using the SIP fixed telephone (1), which is a general communication node, as a source communication node, but the source communication node is limited to a general communication node. Instead, it may be a core communication node or a peripheral communication node.

 If the source communication node is the core communication node, the destination application SIP—MS Key—SIP—URI—is specified from the communication application implemented in this core communication node, as in the above embodiment. Then, the connection request message is transmitted to the SIP-MS of the core communication node, and then transmitted from the SIP-MS to the SIP-PS or the SIP-FPS of the IP network. The following signaling processing is the same as the signaling processing of the above embodiment.

If the originating communication node is a peripheral communication node, the core communication of the signaling network in which the CA—SIP—URI of the peripheral communication node is registered. A connection request message is transmitted to the node's SIP-MS in the same manner as in the embodiment described above, specifying the called party's SIP-MS's Key-SIP-URI, and then the SIP-MS or IP-network's SIP-PS or SIP—will be sent to FPS. The following signaling processing is the same as the signaling processing of the above embodiment. In the above-described embodiment, the case has been described in which one general communication node connects to the communication node or communication application of the called-side signaling network via the IP network. Alternatively, the communication application may be connected to the receiving-side general communication node via the IP network. The communication step is performed in the same manner as the communication step described above. For example, in order to transmit an I NV ITE of a connection request message from the peripheral communication node of the transmitting signaling network, the communication node sends the I-NITE to the SIP-MS of the core communication node of the transmitting side signaling network. Then, it sends an I NV ITE of this connection request message. At that time, the SIP address (SIP-URI) of the receiving general communication node is specified. Further, the IP network (13) of the communication network system according to the present invention may appropriately include SIP-R (40), SIP-RS (35), and SIP-LS (30). (Refer to Fig. 8 and Fig. 9.)

For all S1P-PS or SIP-FPS (2) in (13), SIP-R (40), SIP-RS (35), SIP-LS

It is not necessary to provide (30). For example, as in the above-described embodiment, SIP and FPS having functions of SIP and R may be mixed.

SIP—LS (30) has the registration information of SIP—R (40), that is, SIP— Key (SIP) of MS (2,) and SIP address of general communication node are stored. In other words, in the above embodiment, it is assumed that the SIP-PS or the SIP-FPS (2) of the IP network (1 3) has a function as a registration server. Separate the functions as a separate server (SIP—R) and provide it as a separate server (SIP—R). This SIP—R (40) is the key for SIP—MS (2 ′) In addition to receiving a register such as an address in SIP, the registration information is stored in SIP-LS (30). Then, the SIP-LS (30) responds to a reference request such as an address from the SIP-PS or the SIP-FPS (2) of the IP network 1, the network (13). As a result, the SIP P_PS or SIP FPS (2) of the IP network (1 3) is the core communication node of the user who implements the SIP—MS (2 ') specified by the Key—SIP-URI. The current position of the code can be specified.

Furthermore, by providing SIP—RS (3 5), SIP—PS or SIP—FPS (2) of the IP network (1 3) is compatible with the Key-SI P-UR I of SIP—MS (2,). When the registration information has been moved, it becomes possible to make a reference request such as an address to the SIP-LS (30) via the SIP-RS (35). In the signaling network of the present invention, it is easy to change the peripheral communication node / communication application constituting the signaling network according to the purpose of use and the use environment of the user and according to the change. In addition, the necessary communication nodes and communication applications are registered (REG ISTER) in the SIPD-FPS of the Sidana Ringing Network according to the user's purpose of use and usage environment and according to changes. However, the method can be either automatic registration or manual registration depending on the communication node, communication application, or user preference. Where Figure 5 This will be specifically described with reference to FIG. The Data Base in FIG. 5 is, for example, the above-described address storage area (14).

 If the user is working in the workplace, the SIP—MS, the core communication node that makes up the user's signaling network, is connected to the SIP landline, a peripheral communication node in the workplace (in FIG. 5, Wolk is appended). The registered IP address is registered (REGI STER). On the other hand, when the work is over and the private living environment is reached, the SIP fixed telephone at the workplace is deregistered from the SIP-MS and the user owns the core communication node that constitutes the same signaling network as the user. Register the address (REGISTER) of the SIP mobile phone (in Fig. 5, it is the SIP Cell Phone appended with Private). The deregistration of the SIP landline phone at the workplace from the SIP—MS may be canceled manually by the user, or as described above, since the registration has a retention period, the registration may not be repeated after the retention period. Good.

 By the way, the key communication node SIP—MS Key—SIP—URI that constitutes the user's sidanering network is repeatedly registered (REG ISTER) with the IP network SIP—PS or SIP—FPS. (Of course, if registration is not necessary, registration may be canceled or registration may be repeated, but for convenience of explanation, registration is merely repeated.)

Therefore, even if there is a change in the peripheral communication node communication application that constitutes the signaling network as described above, the address registered in the SIP-PS or SIP-FPS of the IP network will not be signaled. Only the network's SIP-MS Key-SIP-URI and register the changed addresses of peripheral communication nodes and communication applications (CN-SIP-URI, CA-SIP-URI) one by one. No more hassle. This means that each time a change in a peripheral communication node or communication application is made, the SIP PPS or S IP—Signaling processing of registering the addresses of peripheral communication nodes and communication applications to the FPS (REGISTER) is not required, and signaling traffic in the communication access section between the IP network and the user can be minimized. means.

 As described above, by using the signaling network as in the present invention, the user can flexibly change the communication node and the communication application according to the purpose of use and the use environment. That is, the signaling network of the present invention has a network configuration that can be easily reconfigured.

In a conventional communication method using SIP, a communication node and each communication owned by a user registered in the SIP—PS or SIP—FPS from the IP—Network SIP—FPS or SIP—PS. A SIP message was sent to the application. Therefore, in the communication access section between the IP network and the user, SIP messages unnecessary for session establishment are occupied depending on the number of communication nodes and communication applications, and complicated signaling processing is performed. Was something. On the other hand, the following effects can be obtained by the present invention.

 (1) The destination of the SIp message transmitted from the IP network to each user communication node and each communication application is the core communication node of the user, the signaling network 1, and the core communication nodes that constitute the network. SIP—Only MS. Therefore, the signaling traffic in the communication access section between the IP network 1 and the user can always be minimized without depending on the number of communication nodes and communication applications possessed by the user. The usefulness of such an effect in the present invention is remarkable in a communication network system configured so that a large number of communication nodes and communication networks can access the IP network.

(2) Minimize signaling traffic between IP network and users As a result, complicated signaling processing is eliminated and the response is improved.

 (3) The communication node and communication application of the signaling network can be flexibly changed according to the purpose of use and the usage environment of the user, so that the communication node or communication application can be arbitrarily selected at the time of an incoming call.

 (4) The sender need only specify the core communication node of the called party ゃ the SIP—MS Key _S IP—URI of the core communication node of the signaling network. Eliminate the hassle of teaching SI P-UR I for communication applications. Industrial applicability

 Since the present invention has the above effects, it can be used for network communication such as Internet communication, and further, Japanese Patent Application Nos. “Japanese Patent Application Nos. — 3 1747 No.1 ”, it can be used in a seamless integrated network system for wireless systems. For example, multimedia communication such as distribution of music and video, and Internet-in-the-network calls that have the same communication functions as ordinary telephones are widely effective in communication fields where increased traffic is expected to place a heavy burden on networks. Has high potential for use.

Claims

The scope of the claims 1. at least  One or more communication applications,  To the communication application, at least a message in a session initiation protocol (hereinafter referred to as “SIP” in the claims) can be simultaneously transmitted in parallel, and an address of each communication application in SIP. (Hereinafter referred to as “CA-SIP-URI” in the claims) A session initiation protocol management server that is a server in SIP that can be registered and deregistered freely (hereinafter referred to as “SIP-MS” in the claims) ) And A signaling process in the SIP is implemented between the SIP-MS and each communication application registered in the SIP-MS, and is implemented.  Furthermore,  A communication node (hereinafter referred to as a “core communication”) in which a SIP-MS is provided with a SIP address (hereinafter referred to as “Key-SIP—URI” in the claims). Node ".) 2. In a signaling network composed of multiple communication nodes, one of the communication nodes is a core communication node,  The core communication node and a communication node other than the core communication node (hereinafter, referred to as “peripheral communication node” in the claims) are configured to be capable of bidirectional communication, and  The SIP-MS can register and unregister the CA-SIP-URI of each communication application and the SIP address of the peripheral communication node (hereinafter referred to as "CN-SIP_URI" in the claims). So, At the core communication node, the SIP-MS and each communication registered with the SIP-MS In addition to being able to perform SIP signaling processing with applications and communicating with peripheral communication nodes via core communication nodes, SIP-MS and S I P—Signal processing in S I P is possible with peripheral communication nodes registered with the MS,  Furthermore,  A sibling network characterized by being given Key-SIP-URI to SIP-MS. 3. Provide multiple core communication nodes,  3. The signaling network according to claim 2, wherein one core communication node SIP-MS and another core communication node SIP-MS Key-SIP-URI can be registered and deregistered freely. 4. Provide multiple core communication nodes,  The SIPs of each core communication node—MS  3. The signaling network according to claim 2, wherein the Key-SIP-URI can be registered and deregistered freely. 5. Provided for a communication network based on the Internet Protocol (hereinafter referred to as “IP network” in the scope of claims)  A session initiation protocol proxy server that is capable of transmitting at least SIP messages and that can register and deregister Key-SIP-URI (hereinafter referred to as “SIP-PS” in the claims) ), Or At least a session that is a server that can simultaneously send messages in SIP at the same time and that can register and deregister KeyS I P-UR I Initial protocol forking proxy server (hereinafter referred to as "SIP-FPS" in the claims)  The sidan ring network according to any one of claims 2 to 4, wherein the Key-S I P-UR I can be registered and deregistered freely. 6. S IP—PS or Z and S IP—FP network with one or more FPS,  Further  One or more signaling networks according to claim 5 and / or  One or more IP network SIP—PS or SIP—FPS to SIP—MS Key-SIP-URI in a communication network system consisting of a core communication node that can be registered and deregistered freely.  Through the core communication node, two-way communication is enabled between the core communication node SIP—MS and the SIP—PS or SIP_FPS, It is characterized in that SIP signaling processing is possible between SIP-PS or SIP-FPS and SIP-MS whose Key-SIP-URI is registered in the SIP-PS or SIP-FPS. A telecommunications network system. 7. The SIP address of a communication node that does not form a signaling network (hereinafter referred to as a “general communication node” in the claims) can be freely registered and deregistered with the SIP-PS or SIP—FPS of the IP network. And Two-way communication is possible between a SIP—PS or SIP—FP S and a general communication node registered with the SIP—PS or SIP—FP s, 7. The communication network system according to claim 6, wherein a signaling process by SIP is possible. 8. A session initiation protocol registration server (hereinafter referred to as “SIP-R”) or a session initiation protocol location server (hereinafter referred to as “SIP-LS”) in the IP network. 8. The communication network system according to claim 6, further comprising a session initiation protocol redirect server (hereinafter, referred to as “SIP-RS” in the claims). 9. In the communication network system according to any one of claims 6 to 8,  The source communication node sends a connection request message to the destination SIP-MS specified by the Key-SIP-URI to the SIP-PS or SIP-FPS of the IP network,  Next, the SIP—PS or SIP—FPS of the IP network that has received the connection request message is:  If the Key-SIP-URI of the called-side SIP-MS is registered in the SIP-PS or SIP-FPS, the connection request message is sent to the called-side SIP-MS, and  If SIP-MS Key-SIP-URI is not registered in the SIP-PS or SIP-FPS of the IP network that has received the connection request message, another IP-network is not registered. SI —? Or by transferring the connection request message to / from IP-FPS, Sends the above connection request message to the specified destination SIP-MS via the IP network, Next, the SIP_MS receiving the connection request message receives the SIP-URI and the CA-SIP-URI and CN-SIP-URI registered in the SIP-MS of the receiving side. The connection request message is sent to the communication node in parallel and  From one communication application or peripheral communication node selected from each of the communication application and the peripheral communication node to which the connection request message has been transmitted, reverse the communication path via the connection request message from one communication application or the peripheral communication node. Sends a connection response message to the source communication node via  When the connection response message is received by the source communication node,  A communication method in a communication network system, wherein a communication is possible between a source communication node and the selected one communication application or the peripheral communication node by establishing a session. 1 0. The source communication node is the core communication node, and at least a connection request message from the communication application installed in the source communication node to the destination SIP—MS specified by the KeyS IP—URI is sent. S of source communication node The transmission according to claim 9, wherein a session is established with one of the communication applications or the peripheral communication nodes selected on the receiving side by transmitting to the IP-MS to enable mutual communication. A communication method in a communication network system. 1 1. The source communication node is a peripheral communication node, and the peripheral communication node sends the CN-SIP-URI of the peripheral communication node to the SIP-MS of the core communication node of the signaling network in which the SIP-URI is registered. At least one of the communication applications or peripheral communication nodes selected by the called party, by sending a connection request message to the called SIP—MS specified by the Key—SIP—URI. The communication according to claim 9, wherein a session is established between the Communication method in a communication network system. 1 2. The communication method in the communication network system according to claim 9, wherein the source communication node is a general communication node. 1 3. In the communication network system according to claim 8,  The SIP-R receives at least the registration of the address in the SIP-MS Key_SIP-URI and / or the general communication node SIP.  S IP — L S contains the registration information of S IP — R,  SIP—LS can respond to address reference requests from SIP—PS or SIP—FPS on the IP network.  Or  The communication network according to any one of claims 9 to 12, wherein the SIP-LS is capable of responding to an address reference request from the SIP-PS or the SIP-FPS of the IP network via the SIP-RS. Communication method in the system. '