JP2008236374A - Server transfer system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely provide server transfer in a short period of time while securing service quality and suppressing cost about server transfer. <P>SOLUTION: In this server transfer system for transferring one or a plurality of first call control servers to a second call control server, each of the first call control servers has: an address converting means for converting a transmission destination address of received call control packets into address information of the second call control server being a transfer destination of the respective addresses; and a packet transmitting means for transmitting the call control packets subjected to address conversion by the address converting means to the second call control server being a transfer destination of the respective packets, the second call control server returns a response packet to each accommodated terminal in response to each control packet received through each of the first call control server, and an address management server changes an address as the call control server into address information of the second call control server of the transfer destination and notifies each accommodated terminal of the address information of the second call control server. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a server migration system and method, and can be applied to, for example, a system and method for collectively migrating (winding up) call control servers of a voice communication system in a VoIP (Voice Over IP) network.

  In recent years, with the development of IP telephone technology, IP telephones have rapidly spread, and the development of a call control server having a larger capacity and more functions than the existing call control server has progressed, and new call control has been started from the existing call control server. Much has been done to migrate to servers.

  In addition, in order to maintain call processing in the event of an abnormality in the call control server, a system that bypasses the call control packet to the spare call control server and shifts the call control processing to the spare call control server is necessary. is there.

  By the way, in the call control server migration process including the detour to the spare call control server as described above, since voice communication is real-time communication and the number of users is enormous, a reliable service In particular, it is necessary to carry out the migration process accurately in a short period of time.

  That is, even during the call control server migration process, a call request from a user terminal can be made to an existing call control server, so that accurate call control can be ensured quickly without interfering with this call control. It is necessary to perform a migration process.

  A conventional call control server migration method generally uses a NAT (Network Address Translation) server having an IP address translation function such as an IP forward function, and the conventional call control server migration process. Will be described with reference to FIG.

  FIG. 2 shows an operation when the existing call control server 1 and data management server 2 on the VoIP network 5 are migrated to the new call control server 6 and data management server 7.

  First, before migration, system data is set in the new call control server 6 and subscriber contract data to be migrated to the new data management server 7 is set.

  The NAT server 8 is set with an IP address that is the same as the IP address of the existing call control server 1, and forwards the IP packet input to the existing call control server 1 to the new call control server 6. Set.

  Thereafter, the NAT server 8 is deployed on the VoIP network 5 and the existing call control server 1 is removed from the VoIP network 5.

  Next, the IP address of the call control server distributed to the IP telephone terminal 4 by the DHCP server 3 is changed from the IP address of the existing call control server 1 to the IP address of the new call control server 6.

  Then, when it is confirmed that the lease time by the DHCP server 3 has passed and the IP address of the call control server of all IP telephone terminals has been changed to the IP address of the newly established call control server 6 (as an example of this confirmation method, for example, When it is confirmed that the call control IP packet does not communicate with the NAT server 8), the NAT server 8 is removed from the VoIP network 5.

  At the time of filing this application, there is no known prior art document in which the known technology related to the present invention is described, but the technology related to this is disclosed in the unpublished Japanese Patent Application No. 2005-312021. . As a file server migration method, for example, there is a technique described in Patent Document 1.

JP-A-2005-321913

  As described above, in order to migrate a call control server, it is required to provide a reliable service (including a new service provided by a new server) at an early stage and complete the migration process in a short period of time. It is also desirable to reduce the maintenance burden on network administrators. Therefore, the transition (winding) to the new call control server needs to be performed in a short period of time.

  However, the conventional migration method described above requires as many NAT servers as the number of existing call control servers that are the migration source, and the number of NAT servers increases as the number of existing call control servers increases. Therefore, there is a problem that the installation cost of the NAT server increases and the burden on the network administrator for installing and monitoring the NAT server increases.

  Further, in the above-described conventional migration method, it is necessary to replace the existing call control server that is the migration source with a NAT server, and thus there is a problem that the IP telephone service is interrupted at the time of this replacement.

  Therefore, the call control server migration is realized by ensuring the quality of service provided by the call control server and reducing the cost and network administrator burden associated with the call control server migration while keeping the migration period short. What is needed is a server migration system and method that can be used.

  In order to solve such a problem, the server migration system according to the first aspect of the present invention includes one or a plurality of first call control servers that accommodate one or a plurality of accommodation terminals, and addresses assigned to the first call control servers. In a voice communication system comprising an address management server that manages information, in a server migration system that migrates each first call control server to a second call control server, (1) each first call control server is (1-1 ) Address conversion means for converting the destination address of the received call control packet into address information of the second call control server that is the respective transfer destination; and (1-2) the call control packet address-converted by the address conversion means. A packet sending means for sending to each second destination call control server, and (2) the second call control server receives the call through each first call control server. Call control means for returning a response packet corresponding to the call control packet to each accommodating terminal that is the source of the call control packet and performing call control processing for each accommodating terminal; (3) the address management server includes: The address as the call control server is changed to the address information of the second call control server that is the transfer destination of each first call control server, and the address information of the second call control server is set as the address of the call control server to each accommodating terminal. It has an address notification means for notification.

  A server migration system according to a second aspect of the present invention includes one or a plurality of first call control servers that accommodate one or a plurality of accommodation terminals, an address management server that manages address information assigned to each first call control server, In a server migration system that migrates each first call control server to a second call control server in a voice communication system comprising: (1) an address management server assigns an address as a call control server to each first call control server; It has address notification means for changing to the address information of the second call control server that is the transfer destination and notifying each accommodating terminal of the address information of the second call control server as the address of the call control server, (2) the second call The control device server (2-1) call control inhibiting means for inhibiting the call control processing for the received call control packet; and (2-2) the destination address of the received call control packet. Address conversion means for converting the address information into the address information of the first call control server which is the respective transfer source, and (2-3) the first call control which is the call control packet whose address is converted by the address conversion means. And (3) each first call control server sends a response packet corresponding to the call control packet received via the second call control server to the source of the call control packet. And a call control means for performing a call control process for each accommodated terminal in response to each accommodated terminal.

  The server migration method of the third aspect of the present invention includes one or more first call control servers that accommodate one or more accommodation terminals, an address management server that manages address information assigned to each first call control server, and In a server communication method for transferring each first call control server to a second call control server in a voice communication system comprising: each first call control server has an address translation means and a packet sending means; (1) each The address conversion means of the first call control server converts the destination address of the received call control packet into the address information of the second call control server that is the respective transfer destination, and (2) the packet of each first call control server The sending means sends the call control packet whose address has been translated by the address translation means to the second call control server which is the respective migration destination, and (3) the call control of the second call control server. The means returns a response packet corresponding to the call control packet received via each first call control server to each accommodating terminal that is the transmission source of the call control packet, and performs call control processing for each accommodating terminal. 4) The address management server changes the address as the call control server to be managed to the address information of the second call control server that is the migration destination of each first call control server, and calls control the address information of the second call control server Each server is notified as a server address.

  A server migration method according to a fourth aspect of the present invention includes one or more first call control servers that accommodate one or more accommodation terminals, an address management server that manages address information assigned to each first call control server, and In a server communication method for transferring each first call control server to a second call control server in a voice communication system comprising: a second call control server having call control inhibiting means, address converting means, and packet sending means (1) The address management server changes the address as the call control server to the address information of the second call control server that is the migration destination of each first call control server, and calls the address information of the second call control server. Each accommodating terminal is notified as the address of the control server, and (2) the address conversion means of the second call control server whose call control processing has been inhibited by the call control inhibition means has received the received call control packet. (3) the packet transmission means of the second call control server converts the call control packet address-converted by the address conversion means. (4) A response packet corresponding to the call control packet received by the call control means of each first call control server via the second call control server. Is returned to each accommodated terminal that is the transmission source of the call control packet, and the call control processing for each accommodated terminal is performed.

  According to the present invention, the quality of the service provided by the call control server is ensured, and the call control server is reduced in cost and the burden on the network administrator, etc. while migrating the call control server while keeping the transition period short. Can be realized.

(A) 1st Embodiment Below, the 1st Embodiment of the server migration system and method of this invention is described, referring drawings.

  1st Embodiment demonstrates the case where the server transfer system and method of this invention are applied to the system and method which transfer the existing call control server in an IP telephone system to a new call control server.

(A-1) Configuration of the First Embodiment FIG. 1 is an overall configuration diagram showing the configuration of the IP telephone system of the first embodiment. As shown in FIG. 1, the IP telephone system 100 according to the first embodiment includes a call control server 101 and 102, a data management server 103, a DHCP server 104, an IP telephone terminal 106 and 107, which can be connected to a VoIP network 105. It is comprised.

  In addition, for the IP telephone system 100 having such a configuration, a new call control server 108 and a data management server 109 are newly installed on the VoIP network 105 using the maintenance terminal 110, and the call control servers 101 and 102 and the data management server are installed. 103 is transferred to the call control server 108 and the data management server 109.

  Here, the VoIP network 105 is a communication network for transmitting call control IP packets, voice packets, and the like related to voice communication. In the first embodiment, a public communication network adopting the Internet protocol (IP) as a communication protocol is assumed. To do. As the VoIP network 105, a wired line, a wireless line, or a combination of these lines can be applied, and either a dedicated network or a public network can be applied.

  The call control servers 101 and 102 are existing call control servers of the IP telephone system 100. The call control server 101 accommodates the IP telephone terminal 106, and the call control server 102 accommodates the IP telephone terminal 107. . Further, the call control servers 101 and 102 are connected to the data management server 103 and respond to call requests from the IP telephone terminals 106 and 107 using the subscriber contract data and the like managed by the data management server 103. A predetermined call control process is performed to establish a call.

  In addition, the call control servers 101 and 102 convert the IP address of the received IP packet into another IP address, and transmit the received IP packet to the destination (interface) routed based on the converted IP address. It has an address translation / transmission function. The call control servers 101 and 102 provide the received call control IP packet (IP packet) to the newly established call control server 108 using this address translation / transmission function after the new call control server 108 is newly established. .

  Here, the address conversion / transmission function converts a transmission destination address of a received packet received from one or a plurality of specific interfaces into a specific transmission destination address, and a specific interface based on the converted transmission destination address. For example, an IP forwarding function that is generally provided in a call control server can be applied.

  The data management server 103 is an existing data management server that manages subscriber contract data and the like of the IP telephone system 100.

  The DHCP server 104 dynamically notifies the IP phone terminals 106 and 107 of network information such as an IP address, and an existing DHCP server can be applied.

  The IP telephone terminals 106 and 107 are existing IP telephone terminals that allow users to implement voice communication. For example, an information processing terminal that has a softphone function that implements voice communication processing by software processing, and an adapter that implements VoIP. Other voice communication terminals such as a mobile terminal such as a mobile terminal such as a telephone terminal, a mobile phone, and a wireless LAN terminal having a voice communication function can be applied.

  The call control server 108 is a call control server newly provided in the IP telephone system 100. The data management server 109 is a data management server 109 newly provided in the IP telephone system 100.

  The maintenance terminal 110 instructs a predetermined setting to the existing call control servers 101 and 102, the data management server 103, or the new call control server 108 and the data management server 109 by operations of a network administrator or a maintenance person. To do.

(A-2) Operation of the First Embodiment Next, in the IP telephone system 100 of the first embodiment, the existing call control servers 101 and 102 and the data management server 103 are replaced with the new call control server 108 and the data management. Server migration processing to be migrated to the server 109 will be described with reference to the drawings.

  FIG. 3 is an explanatory diagram for explaining a preparation process performed for the new call control server 108 and the data management server 109 before server migration.

  In FIG. 3, before performing server migration, first, the network administrator or the like operates the maintenance terminal 110 to set call control inhibition for the new call control server 108 (S11).

  Here, the call control suppression setting for the newly established call control server 108 is to prevent double call control processing from being performed with the existing call control servers 101 and 102. Various methods can be applied as the method.

  For example, the new call control server 108 is provided in the VoIP network 105 without registering the IP address of the new call control server 108 in the DHCP server 104 as the IP address of the call control server. As a result, since the IP address of the new call control server 108 is not added as the destination address of the call control IP packet transmitted by the IP telephone terminals 106 and 107, the call control IP packet is transmitted to the new call control server 108. Instead, the call control processing of the new call control server 108 can be suppressed.

  Further, for example, the new call control server 108 may be set so as not to transmit a response signal to the received call control IP packet. That is, even if request signals are received from IP telephone terminals 106 and 107, the call control process may not be performed by not returning a response signal to the request signal.

  Further, for example, the call control IP packet received for the new call control server 108 may be discarded to suppress the call control processing. That is, when a call control suppression control signal is given from the maintenance terminal 110 to the call control server 108, the call control server 108 discards the received call control IP packet even if the call control IP packet is received. . Thereby, the call control process by the new call control server 108 can be suppressed.

  Next, the network administrator or the like operates the maintenance terminal to set data such as subscriber data and system data of the IP telephone system 100 for the newly installed data management server 109 (S12).

  4 to 6 are explanatory diagrams illustrating server migration processing according to the first embodiment.

  In FIG. 4, a new call control server 108 and a data management server 109 are connected to the network 105, and a network administrator or the like operates the maintenance terminal 110 to cancel the call control suppression setting of the new call control server 108 ( S13).

  That is, the call control suppression setting is canceled for the new call control server 108, and the call control process is performed on the call control IP packets received from the IP telephone terminals 106 and 107. Release processing corresponding to the control inhibition method can be applied.

  For example, a response signal can be returned to the call control IP packet received by the new call control server 108, or the discard of the call control IP packet received by the new call control server 108 is stopped, for example. There is a way to do it.

  Subsequently, the network administrator or the like operates the maintenance terminal 110 to set the IP forwarding function to transmit the received call control IP packet to the new call control server 108 to the existing call control servers 101 and 102. (S14). Note that the IP forwarding function setting method provided in the existing server can be applied to the IP forwarding function setting method.

  In FIG. 5, after the IP forwarding function is set for the existing call control servers 101 and 102, call control IP packets from the IP telephone terminals 6 and 7 are given to the existing call control server 101 or 102. Then, the call control IP packet is given to the new call control server 108 by the IP forwarding function of the existing call control servers 101 and 102 (S15).

  That is, the destination IP address of the call control IP packet transmitted by the IP telephone terminals 106 and 107 is the existing call control server 101 or 102. When the call control IP packets from the IP telephone terminals 106 and 107 are given to the existing call control server 101 or 102, the destination IP address of the call control IP packet is changed to the IP of the new call control server 108 by the IP forwarding function. It is converted into an address and transmitted to the new call control server 108.

  At this time, when the call control IP packet from the IP telephone terminals 106 and 107 forwarded from the existing call control server 101 or 102 is given to the new call control server 108, the new call control server 108 receives the received call control. A response packet in response to the IP packet is directly transmitted to the IP telephone terminals 106 and 107 (S16).

  At this stage, that is, at the stage of executing the call control function of the new call control server 108 using the IP forwarding function of the existing call control servers 101 and 102, the call control function of the new call control server 108 is changed. When a problem is found, the network administrator or the like operates the maintenance terminal 110 to cancel the setting of the IP forwarding function for the existing call control servers 101 and 102, and to the newly established call control server 108. On the other hand, it is possible to easily cope with the situation by setting the call control inhibition to the original operation setting.

  As shown in FIG. 5, a call control IP packet can be given to the new call control server 108 by using the IP forwarding function of the existing call control servers 101 and 102, and normal call by the new call control server 108 can be performed. If the control process can be performed, then, as shown in FIG. 6, the IP address of the call control server in the DHCP server 104 is changed (S17).

  That is, in FIG. 6, the IP address of the call control server managed by the DHCP server 104 is changed from the IP address of the existing call control servers 101 and 102 to the IP address of the new call control server 108.

  As described above, when the IP address of the call control server is changed in the DHCP server 104, the DHCP server 104 then requests the IP address from the IP telephone terminals 106 and 107 whose activation or lease period has passed. Along with the IP addresses assigned to the telephone terminals 106 and 107, the IP address of the newly established call control server 108 can be notified as the IP address of the call control server.

  When it is confirmed that the call control IP packets from the IP telephone terminals 106 and 107 are not given to the existing call control servers 101 and 102, the call control servers 101 and 102 are connected to the VoIP network 105 together with the data management server 103. Remove (S18).

  In this way, the process of transferring the existing call control servers 101 and 102 to the new call control server 108 is completed.

(A-3) Effect of the First Embodiment As described above, according to the first embodiment, the call control server as the migration source has an address translation / transmission function (for example, an IP forwarding function). By using this address translation / transmission function to perform a transition process to a newly established call control server, it is not necessary to provide a NAT server as in the prior art. The replacement process becomes unnecessary. As a result, it is possible to perform server migration processing while keeping costs down in a shorter period of time and without interrupting service.

  Further, according to the first embodiment, even when an abnormality occurs in the call control server, the migration process can be easily switched back, so that a simplified safe and reliable server migration process can be realized.

(B) Second Embodiment Next, a second embodiment of the server migration system and method of the present invention will be described with reference to the drawings.

  In the second embodiment, a case where the server migration system and method of the present invention are applied to a system and method for migrating an existing call control server in an IP telephone system to a new call control server will be described.

(B-1) Configuration of the Second Embodiment The second embodiment is different from the first embodiment in the first embodiment that a plurality of migration source call control servers are connected to one new call. Although the case of shifting to the control server has been described, in the second embodiment, the case of transferring one transfer source call control server to a plurality of new call control servers will be described.

  FIG. 7 is an overall configuration diagram showing the configuration of the IP telephone system of the second embodiment. As shown in FIG. 7, the IP telephone system 200 according to the second embodiment includes a call control server 201, a data management server 202, a DHCP server 203, and an IP telephone terminal 205 that can be connected to the VoIP network 204. Composed.

  For the IP telephone system 200 having such a configuration, new call control servers 207 and 208 and a data management server 209 are newly provided on the VoIP network 205 using the maintenance terminal 210, and the call control server 201 and the data management are established. Assume that the server 202 is migrated to the call control servers 207 and 208 and the data management server 209.

  The call control server 201 is an existing call control server in the IP telephone system 200, and accommodates a plurality of (two in FIG. 7) IP telephone terminals 205 and 206.

  The call control servers 207 and 208 are new call control servers 207 and 208 newly installed in the IP telephone system 200. The call control servers 207 and 208 are assumed to have an address translation / transmission function (for example, an IP forwarding function).

  In the second embodiment, by using the IP forwarding function of the new call control servers 207 and 208, call control is performed on the migration destinations for a plurality of IP telephone terminals 205 and 206 accommodated in the existing call control server 201. It is assumed that the servers 207 and 208 are divided and migrated.

  7 correspond to the components of the IP telephone system 100 described in the first embodiment shown in FIG. 1, and therefore the configuration of each component here. The detailed description about is omitted.

(B-2) Operation of the Second Embodiment Next, in the IP telephone system 200 of the second embodiment, the existing call control server 201 and data management server 202 are replaced with new call control servers 207 and 208 and data management. Server migration processing to be migrated to the server 209 will be described with reference to the drawings.

  FIG. 8 is an explanatory diagram for explaining a preparation process performed for the new call control servers 207 and 208 and the data management server 209 before server migration.

  In FIG. 8, before performing server migration, first, the network administrator or the like operates the maintenance terminal 210 to set call control inhibition for the new call control servers 207 and 208 (S21).

  Note that the call control inhibition setting method described in the first embodiment can be applied to the call control inhibition setting method for the new call control servers 207 and 208.

  Next, the network administrator or the like operates the maintenance terminal to set data such as subscriber data and system data of the IP telephone system 200 for the newly installed data management server 209 (S22).

  9 to 11 are explanatory diagrams illustrating server migration processing according to the second embodiment.

  In FIG. 9, when the call control servers 207 and 208 are connected to the VoIP network 205, a control signal for setting the IP forwarding function is given from the maintenance terminal 210 to the call control servers 207 and 208 by the operation of the network administrator or the like. The IP forwarding function is set in the call control servers 207 and 208 (S23).

  Also, the IP address of the call control server managed by the DHCP server 203 is changed from the IP address of the existing call control server 201 to the IP addresses of the new call control servers 207 and 208 (S24).

  When the IP address of the call control server is changed to the IP address of the new call control servers 207 and 208 in the DHCP server 203, a request is received from the IP telephone terminals 205 and 206 after the activation or lease period has passed, The server 203 notifies the IP telephone terminals 205 and 206 of the IP addresses of the new call control servers 207 and 208 as the IP address of the call control server.

  Then, as shown in FIG. 10, IP telephone terminals 205 and 206 transmit call control IP packets with the IP addresses of newly established call control servers 207 and 208 as destination IP addresses.

  When the call control IP packets from the IP telephone terminals 205 and 206 are given to the new call control servers 207 and 208, the destination IP address of the call control IP packet is set by the IP forwarding function of the new call control servers 207 and 208. Then, it is converted into the IP address of the existing call control server 201 and forwarded to the existing call control server 201 based on the converted IP address (S25).

  When the call control IP packets forwarded from the new call control servers 207 and 208 are given to the existing call control server 201, the existing call control server 201 sends a response packet in response to the received call control IP packet to the IP telephone. It transmits directly to the terminals 205 and 206 (S26).

  At this time, since the call control suppression function is set in the new call control servers 207 and 208, the response packets for the received call control IP packets are not transmitted to the IP telephone terminals 205 and 206, but all received The call control IP packet is transmitted to the existing call control server 201.

  Thereafter, when it is confirmed in the existing call control server 201 that the call control IP packets from the IP telephone terminals 205 and 206 do not arrive, the network administrator or the like operates the maintenance terminal 210 to operate the new call control server 207. And 208, a control signal for canceling the call control suppression setting and canceling the setting of the IP forwarding function in the new call control servers 207 and 208 is transmitted to the new call control servers 207 and 208 (S27).

  At this stage, that is, when the call control function of the new call control servers 207 and 208 is executed using the IP forwarding function of the new call control servers 207 and 208, the new call control servers 207 and 208 When a problem is found in the call control function, the network administrator or the like operates the maintenance terminal 210 to set the IP forwarding function and the call control suppression for the new call control servers 207 and 208. This can be easily dealt with by restoring the original operation settings.

  When it is confirmed that the call control IP packets from the IP telephone terminals 205 and 206 are not given to the existing call control server 201, the call control server 201 is removed from the VoIP network 205 together with the data management server 202 (S28). ).

  In this way, the process of transferring the existing call control server 201 to the new call control servers 207 and 208 is completed.

(B-3) Effect of Second Embodiment As described above, according to the second embodiment, the new call control server has an address translation / transmission function (for example, an IP forwarding function). By using the address translation / transmission function to migrate to a new call control server, there is no need to provide a NAT server as in the prior art, so there is no need to install a NAT server. Replacement processing is not necessary. As a result, it is possible to perform server migration processing while keeping costs down in a shorter period of time and without interrupting service.

  Further, according to the second embodiment, even when an abnormality occurs in the call control server, the migration process can be easily switched back, so that a simplified safe and reliable server migration process can be realized.

(C) Other Embodiments (C-1) In the first and second embodiments described above, the collective winding method for transferring an existing call control server to a new call control server has been described. The present invention can also be applied to a system in which call control packets are bypassed to a spare call control server and a call control process is transferred to the spare call control server when a call control server having a forward function fails or is congested.

  FIG. 12 is an explanatory diagram for explaining another embodiment. As shown in FIG. 12, the call control server 31 that accommodates the IP telephone terminal 32 has at least a call control function 311 and an IP forward function 312. In addition, a call control server 33 that is reserved for the call control server 31 is provided on the network in advance.

  In FIG. 12, as a normal operation of the call control server 31, the IP forward function 312 of the call control server 31 is not functioning, and a call control IP packet arriving from the accommodated IP telephone terminal 32 is Thus, a predetermined call control process is performed (FIG. 12A).

  In the call control server 31, when the call control function 311 breaks down or the call control function 311 does not function due to congestion with a plurality of call control IP packets, the IP forward function 312 is set (FIG. 12). (B)).

  That is, the IP forward function 312 converts the destination address of the received call control IP packet into the IP address of the spare call control server, and converts the received call control IP packet based on the converted destination address to the call control server. 33 is set to be sent out.

  Then, when the received call control IP packet is given to the call control server 31, the IP forward function 312 converts the destination address of the call control IP packet into the IP address of the spare call control server 33, and the call control IP packet. Is sent to the spare call control server 33 (FIG. 12C). As a result, the call control IP packet that has arrived at the call control server 31 that has failed or the like can be diverted to the spare call control server 33, and the call control process can be shifted.

(C-2) In the first embodiment, the case where two existing call control servers are migrated to one new call control server has been described. However, one existing call control server is replaced with one new call control server. The present invention can also be applied to a case where a call control server is migrated or three or more existing call control servers are migrated to one new call control server.

  In the second embodiment, a case has been described in which one existing call control server is migrated to two new call control servers. However, one existing call control server is replaced with one new call control server. The present invention can also be applied to a case where the system is migrated to 3 or more than 3 new call control servers.

(C-3) The processing described above can be realized as software. That is, each function is realized by executing a processing program in which hardware resources such as a CPU are software processes. Further, the processing described above is not limited to software, and may be realized as hardware if it can be realized as hardware.

1 is an overall configuration diagram of an IP telephone system according to a first embodiment. It is explanatory drawing explaining the server transfer process in the conventional IP telephone system. It is explanatory drawing explaining the server transfer process in the IP telephone system of 1st Embodiment (the 1). It is explanatory drawing explaining the server transfer process in the IP telephone system of 1st Embodiment (the 2). It is explanatory drawing explaining the server transfer process in the IP telephone system of 1st Embodiment (the 3). It is explanatory drawing explaining the server transfer process in the IP telephone system of 1st Embodiment (the 4). It is a whole block diagram of the IP telephone system of 2nd Embodiment. It is explanatory drawing explaining the server transfer process in the IP telephone system of 2nd Embodiment (the 1). It is explanatory drawing explaining the server transfer process in the IP telephone system of 2nd Embodiment (the 2). It is explanatory drawing explaining the server transfer process in the IP telephone system of 2nd Embodiment (the 3). It is explanatory drawing explaining the server transfer process in the IP telephone system of 2nd Embodiment (the 4). It is explanatory drawing explaining the detouring process of the IP telephone system of other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 and 200 ... IP telephone system, 101, 102 and 201 ... Existing call control server, 108, 207 and 208 ... New call control server, 103 and 202 ... Existing data management server, 109 and 209 ... New data management Servers 106, 107, 205 and 206... IP telephone terminal, 31... Call control server, 311... Call control function, 312 ... IP forward function, 32.

Claims (4)

A voice communication system comprising one or more first call control servers that accommodate one or more accommodation terminals, and an address management server that manages address information assigned to each of the first call control servers. In a server migration system for migrating one call control server to a second call control server,
Each of the first call control servers is
Address conversion means for converting the destination address of the received call control packet into the address information of the second call control server which is the respective transfer destination;
Packet sending means for sending the call control packet whose address has been translated by the address translation means to the second call control server which is the respective migration destination, and
The second call control server returns a response packet corresponding to the call control packet received via the first call control server to the accommodating terminal that is the transmission source of the call control packet, and Having call control means for performing call control processing on the accommodation terminal;
The address management server changes the address as the call control server to the address information of the second call control server that is the transfer destination of each first call control server, and calls the address information of the second call control server. A server migration system comprising address notification means for notifying each of the accommodation terminals as an address of a control server. A voice communication system comprising one or more first call control servers that accommodate one or more accommodation terminals, and an address management server that manages address information assigned to each of the first call control servers. In a server migration system for migrating one call control server to a second call control server,
The address management server changes the address as the call control server to the address information of the second call control server that is the transfer destination of each first call control server, and calls the address information of the second call control server. Having an address notification means for notifying each accommodation terminal as the address of the control server,
The second call control server is
Call control inhibiting means for inhibiting call control processing for the received call control packet;
Address conversion means for converting the destination address of the received call control packet into the address information of the first call control server as the respective migration source;
Packet sending means for sending the call control packet whose address has been translated by the address translation means to the first call control server that is the respective migration source, and
Each of the first call control servers returns a response packet corresponding to the call control packet received via the second call control server to each of the accommodating terminals that is the transmission source of the call control packet, and A server migration system comprising call control means for performing call control processing relating to an accommodation terminal. A voice communication system comprising one or more first call control servers that accommodate one or more accommodation terminals, and an address management server that manages address information assigned to each of the first call control servers. In a server migration method for migrating one call control server to a second call control server,
Each of the first call control servers has address translation means and packet transmission means,
The address conversion means of each first call control server converts the destination address of the received call control packet into address information of the second call control server that is the respective migration destination,
The packet sending means of each first call control server sends the call control packet address-converted by the address converting means to the second call control server that is the respective migration destination,
The call control means of the second call control server returns a response packet corresponding to the call control packet received via the first call control server to each accommodating terminal that is the transmission source of the call control packet. Then, perform call control processing for each of the accommodation terminals,
The address management server changes the address as the call control server to be managed to the address information of the second call control server that is the migration destination of each first call control server, and the address information of the second call control server is changed. A server migration method characterized by notifying each of the accommodation terminals as an address of a call control server. A voice communication system comprising one or more first call control servers that accommodate one or more accommodation terminals, and an address management server that manages address information assigned to each of the first call control servers. In a server migration method for migrating one call control server to a second call control server,
The second call control server has call control inhibiting means, address converting means, and packet sending means,
The address management server changes the address as the call control server to the address information of the second call control server that is the transfer destination of each first call control server, and calls the address information of the second call control server. Notify each accommodating terminal as the address of the control server,
The address conversion means of the second call control server whose call control processing has been suppressed by the call control suppression means has the destination information of the received call control packet as the address information of the first call control server that is the respective migration source. Converted to
The packet sending means of the second call control server sends the call control packet whose address has been converted by the address converting means to the first call control server which is the respective migration source,
The call control means of each first call control server returns a response packet corresponding to the call control packet received via the second call control server to each accommodating terminal that is the transmission source of the call control packet. Then, a server migration method characterized by performing a call control process on each of the accommodation terminals.

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