KR101048875B1 - Load balancing system and method of IMS server in internet telephony service - Google Patents

Abstract

Provided are a load balancing system and method for an IP Multimedia Subsystem (IMS) server in an Internet telephony service. The load balancing system of an IMS (IP Multimedia Subsystem) server in an Internet telephony service includes an Internet telephony terminal management unit that receives subscriber information from an Internet telephony terminal, and an IMS server that monitors the status of the IMS servers and calculates an acceptance rate of each IMS server. A server group extracting unit for extracting an IMS server group to be distributed to the internet phone terminal based on the subscriber information and an IMS server to be distributed to the internet phone terminal based on the acceptance rate; It includes a server decision unit to determine from the group.

Internet telephony, IMS, load balancing, phased out, ID, weighted

Description

Load balancing system and method of IMS server in internet telephony service {LOAD-BALANCNG SYSTEM AND METHOD OF IMS SERVER ON VOIP SERVICE}

The present invention relates to an IP Multimedia Subsystem (IMS) server load balancing system and method in an Internet telephony service. More particularly, the present invention relates to a step-by-step determination of an IMS server to be distributed to an Internet telephony terminal by monitoring operation information of the IMS server. IMS server load balancing system and method.

Compared to the existing circuit switching network (PSTN, mobile phone), the Internet phone (VoIP) using the cheaper internet network is showing a clear cost advantage centering on the enterprise, and gradually expanding the market, and the market is expanding to individual users. .

Internet phones are largely divided into PC-to-PC, which is a telephone call through a computer and a computer, PC-to-Phone, which is a computer and a telephone, and Phone-to-Phone, which is a telephone and a telephone. Internet telephones can lower call costs than telephones using public switched telephone networks (PSTNs) because they use the public Internet, which uses packet transmission, compared to public telephone networks that use line transmission.

The packet transmission method used in the public Internet does not use a specific line exclusively like the circuit transmission method. Instead, the data to be transmitted is divided into several packets and placed on the transmission line so that the packets reach the destination through the fastest path. As a method, a transmission line is mixed with packets sent by multiple users, which allows a plurality of users to share a circuit at the same time, thereby providing a service at a lower price than a circuit transmission method having a monopoly.

In providing the above Internet telephony service, an internet telephony server is required, which is generally produced by an internet telephony service provider and provided to clients wishing to make an internet telephony call.

However, since the Internet telephone server provided by the Internet telephone service provider controls not only a small number of telephone calls but also simultaneously controls a large number of telephone calls, the number of clients using the Internet telephone server increases the load on the server. There has been a problem that the degree of delay and loss of voice data increases.

In particular, in the case of an Internet phone, if the voice data is delayed or lost, the phone caller feels a great deal of discomfort. Therefore, controlling the load of the Internet phone server has been an important issue for the call quality of the Internet phone.

In addition, in the case of Internet telephony, depending on the number of public-ID and private-ID of the subscriber, there is a difference in the degree of load on the server, but this was not considered when balancing the load of the server. Furthermore, the regional characteristics of the Internet telephony terminal and the management problems of the service provider were not considered at the time of load balancing of the server.

Therefore, there is a strong demand for a method of more effectively distributing the load of the Internet telephone server at the time of opening of the Internet telephone or in the case of failure or expansion of the server.

Some embodiments of the present invention provide an IMS server load balancing system and method capable of determining in stages an IP Multimedia Subsystem (IMS) server to be distributed to an Internet telephone terminal.

In addition, an embodiment of the present invention provides an IMS server load balancing system and method that can calculate the acceptance rate based on the type of subscriber ID of the IMS server, and can determine the IMS server to be registered by the Internet telephone terminal.

In addition, an embodiment of the present invention provides an IMS server load balancing system and method that can redistribute an IMS server of an Internet telephone terminal registered in a faulty or expanding IMS server in stages.

As a technical means for achieving the above technical problem, the first aspect of the present invention is an Internet phone terminal management unit for receiving subscriber information from an Internet phone terminal, IMS to monitor the status of the IMS server to calculate the acceptance rate of each IMS server A server operating unit, a server group extracting unit for extracting an IMS server group to be distributed to the Internet telephone terminal based on the subscriber information, and an IMS server to be distributed to the Internet telephone terminal based on the acceptance rate; It is possible to provide a load balancing system of an IMS (IP Multimedia Subsystem) server in an Internet telephony service including a server determination unit for determining among groups.

In addition, the second aspect of the present invention is to receive the subscriber information from the Internet phone terminal, extracting the IMS server group to be distributed to the Internet phone terminal based on the subscriber information, monitor the number of subscribers of the IMS server Calculating an acceptance rate of each IMS server based on the number of subscribers, and determining, from the extracted IMS server group, an IMS server to be distributed to the Internet telephone terminal based on the acceptance rate. It is possible to provide a load balancing method of an IMS (IP Multimedia Subsystem) server.

According to the above-described problem solving means of the present invention, it is possible to more appropriately distribute the load of the IMS server by determining the IMS (IP Multimedia Subsystem) server to be distributed to the Internet telephone terminal step by step using a static method and a dynamic method. It becomes possible.

In addition, according to the above-described problem solving means of the present invention, by applying different weights according to the number of Public-ID of the Internet phone terminal registered in the IMS server to calculate the acceptance rate of the IMS server, the load on the IMS server is more It can be distributed efficiently.

In addition, according to one of the other problem solving means of the present invention by redistributing the IMS server of the Internet phone terminal registered to the IMS server in the failure or expansion step by step, it is possible to distribute the load of the IMS server flexibly even in case of server failure do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of an IP Multimedia Subsystem (IMS) server load balancing system according to an embodiment of the present invention.

As shown in FIG. 1, an IMS server load balancing system according to an embodiment of the present invention includes an Internet phone terminal 100, an Internet phone service unit 200, an IMS server operation unit 300, and an IMS server distribution unit ( 400 and IMS server 500.

In addition, the Internet phone service unit 200 includes an Internet phone terminal management unit 210 and subscriber information DB 220, the IMS server operation unit 300 is a monitoring unit 310, acceptance rate calculation unit 320 and The acceptance rate DB 330 is included. In addition, the IMS server distribution unit 400 includes a transceiver 410, a server group extraction unit 420 and the server determination unit 430.

The Internet phone terminal 100 provides subscriber information to the Internet phone terminal manager 210 when Internet phone is opened, receives the address of the IMS server from the Internet phone terminal manager 210 and registers the IMS server.

The subscriber information includes an installation address, phone number, subscriber ID, etc. of the Internet phone terminal, and the Internet phone terminal 100 uses wired / wireless communication using a communication method such as LAN, WAN, WiFi, CDMA, WCDMA, WiBro, and HSDPA. You can access the Internet. In addition, the Internet phone terminal 100 may be equipped with a separate agent to transmit and receive information with the Internet phone terminal management unit 210.

The Internet phone service unit 200 receives subscriber information from the Internet phone terminal 100, receives IMS server information from the IMS server distribution unit 400, which will be described later, and provides the information to the Internet phone terminal 100.

The Internet phone terminal manager 210 detects a connection of the Internet phone terminal 100 and receives subscriber information from the Internet phone terminal 100. In addition, the Internet phone terminal management unit 210 requests the IMS server management unit 300 to be described later, the IMS server address to be registered by the Internet phone terminal 100, and receives the IMS server information distributed from the IMS server management unit 300. It can be provided to the Internet phone terminal 100.

The subscriber information DB 220 stores subscriber information related to the Internet phone terminal 100. The subscriber information includes, for example, the type of service subscribed to by the subscriber, the installation address of the Internet telephone terminal 100, a telephone number, an IMS authentication ID, a password, and the like.

The IMS server operation unit 300 monitors the status of the IMS server, calculates the acceptance rate of the IMS server, and provides the calculated acceptance rate to the IMS server distribution unit 400 which will be described later.

The monitoring unit 310 monitors the state of the IMS server and provides the monitoring information to the acceptance rate calculating unit 320. The monitoring unit 310 may monitor the number of Internet telephone terminals 100 registered for each IMS server, the type of ID of the Internet telephone terminal 100, a failure of the IMS server, and the like.

The ID of the Internet phone terminal 100 may include a Public-ID and a Private-ID, and the number of the Public-ID and the Private-ID may be referred to by different weights in the acceptance rate calculator 320 to be described later. have. Here, the Public-ID means a representative ID assigned to a subscriber registered in the IMS server, and the Private-ID means an individual ID belonging to each Public-ID. For example, an Internet telephone subscriber may have one Public-ID and at the same time have a plurality of Private-IDs belonging to the Public-ID.

In addition, the monitoring unit 310 monitors the failure of the IMS server, and if a failure occurs in the IMS server and cannot be used, the Internet telephone terminal 100 registered in the failed IMS server becomes a new IMS server. In order to be able to register at 500, information about the Internet phone terminal 100 registered in the failed IMS server may be provided to the Internet phone service unit 200.

In this case, the Internet phone service unit 200 may request the IMS server distribution unit 400, which will be described later, to the IMS server to be registered by the Internet phone terminal 100 registered in the failed IMS server.

The acceptance rate calculation unit 320 calculates an acceptance rate of each IMS server based on the received monitoring information of the IMS server. The acceptance rate calculation unit 320 may calculate the acceptance rate of the IMS server according to a predetermined algorithm based on the number of the Internet telephone terminal 100 and the type of the ID of the Internet telephone terminal 100.

In addition, the acceptance rate calculator 320 may calculate the acceptance rate of the IMS server in consideration of the type and number of IDs of the Internet phone terminal 100 registered in the IMS server 500. The acceptance rate calculation unit 320 first calculates an acceptance rate of the IMS server 500 based on the number of private-IDs of the Internet phone terminal 100 registered in the IMS server, and then differs according to the number of public-IDs. The weighting factor can finally calculate the acceptance rate.

The acceptance rate DB 330 stores the acceptance rate of each IMS server 500 calculated by the acceptance rate calculation unit 320.

The IMS server distribution unit 400 distributes the IMS server 500 to be registered by the Internet phone terminal 100.

The transceiver 410 transmits and receives information necessary for distribution of the Internet telephony service unit 200 and the IMS server operation unit 300 and the IMS server 500.

The server group extracting unit 420 receives subscriber information of the Internet phone terminal 100 from the Internet phone service unit 200, and based on the received subscriber information, sets the IMS server group to be registered by the Internet phone terminal 100. Extract automatically.

The server group extracting unit 420 may preferentially extract the IMS servers 500 existing in an area close to the area where the Internet phone terminal 100 is installed, based on the installation address of the Internet phone terminal 100 among subscriber information. In this case, the Internet telephony terminal 100 may be distributed with the IMS server 500 existing at a primary location.

In addition, the server group extracting unit 420 may preferentially extract the IMS servers in which many telephone numbers of similar station numbers are registered, based on the telephone number of the Internet telephone terminal 100 among the subscriber information. The telephone service provider can efficiently manage the Internet telephone terminal 100.

Meanwhile, the server group extracting unit 420 may extract the IMS server group by various algorithms based on the combination of the installation address and the telephone number of the Internet phone terminal 100.

In addition, the server group extracting unit 420 may extract the IMS server group except for the failed IMS server 500 when some of the IMS servers 500 have failed.

The server determination unit 430 determines the IMS server 500 to be distributed to the Internet telephone terminal 100 in the extracted IMS server group. The server determination unit 430 may determine the IMS server 500 to be distributed to the Internet phone terminal 100 based on the acceptance rate of each IMS server received from the IMS server operation unit 300.

On the other hand, if some of the IMS server 500 has failed, the server group extraction unit 420 and the server determination unit 430 are newly distributed to each Internet telephone terminal 100 registered in the failed IMS server 500. IMS server 500 can determine

The IMS server distribution unit 400 firstly extracts the IMS server group in a static manner based on the installation address or phone number of the Internet telephone terminal 100, and secondarily accepts the extracted IMS server. Since the IMS server 500 to be distributed is determined in a dynamic manner based on the rate, not only the status of the IMS server 500 but also the characteristics of the Internet telephone terminal 100 and problems in managing the Internet telephone service are considered. It is possible to efficiently distribute the IMS server 500.

Furthermore, since the IMS server distribution unit 400 may calculate the acceptance rate only for the IMS server 500 belonging to the IMS server group extracted primarily, and determine the IMS server to be distributed, when the load balancing of the IMS server occurs. You can also reduce the amount of computation.

The IMS server 500 receives a registration request from the Internet phone terminal 100, checks the validity of the terminal using the IMS authentication ID and password of the Internet phone terminal 100, and calls the Internet phone terminal 100. To provide

Hereinafter, a subscriber information table stored in the subscriber information DB 220 according to an embodiment of the present invention will be described with reference to FIG. 2.

2 is an example of a subscriber information table stored in the subscriber information DB 220 according to an embodiment of the present invention.

As shown in Fig. 2, the subscriber information table includes an Internet telephone terminal ID field 20, an installation address field 22, a telephone number field 24, an IMS authentication ID field 26 and a password field 28. can do.

The installation address and telephone number of the Internet telephone terminal 100 stored in the installation address field 22 and the telephone number field 24 are the IMS server group that the server group extraction unit 420 intends to distribute to the Internet telephone terminal 100. Can be used to extract.

The IMS authentication ID and password of the Internet phone terminal 100 stored in the IMS authentication ID field 26 and the password field 28 are stored in the IMS server distributed by the Internet phone terminal 100 that has received the IMS server information. Can be used when performing registration.

Hereinafter, the acceptance rate information table stored in the acceptance rate DB 330 according to an embodiment of the present invention will be described with reference to FIG. 3.

3 is an example of a storage rate information table stored in the storage rate DB 330 according to an embodiment of the present invention.

As shown in FIG. 3, the acceptance rate information table includes an IMS server name field 30, a subscriber count field 32, and an acceptance rate field 28, where the subscriber count field 32 is a Public-ID number field. 34 and Private-ID Number field 36.

The acceptance rate calculation unit 320 calculates an acceptance rate for each IMS server 500 based on the number of Private-IDs first, and is calculated based on the number of Public-IDs. Can be. Accordingly, in calculating the acceptance rate of IMS # 1 and IMS # 2 having the same number of Private-IDs as 350, the acceptance rate calculation unit 320 gives a higher weight to IMS # 2 having a smaller number of Public-IDs, thereby increasing the weight of IMS # 2. The acceptance rate of can be calculated higher.

Hereinafter, an IMS server load balancing method at the time of opening an Internet telephone according to an embodiment of the present invention will be described with reference to FIG. 4.

4 is an information flow diagram illustrating an IMS server load balancing method when opening an Internet phone according to an embodiment of the present invention.

First, the Internet phone service unit 200 receives subscriber information from the Internet phone terminal 100 (step S400), and requests the distribution of the IMS server to the IMS server distribution unit 400 (step S402). The Internet phone service unit 200 may provide subscriber information such as an installation address and a phone number of the Internet phone terminal 100 to the IMS server distribution unit 400 when a distribution request is made from the IMS server.

Thereafter, the IMS server distribution unit 400 primarily extracts the IMS server group to be distributed to the Internet telephone terminal 100 based on the received subscriber information, and extracts information on the extracted IMS server group from the IMS server operation unit ( 300) (step S404). The IMS server distribution unit 400 may extract the IMS server group based on at least one of an installation address or a telephone number of the Internet phone terminal 100.

In addition, the IMS server operation unit 300 monitors the IMS server 500 and collects monitoring information such as the number of subscribers, the number of Public-IDs, and the number of Private-IDs of the IMS server 500 (step S406).

Thereafter, the IMS server operation unit 300 calculates the acceptance rate for each IMS server 500 (step S408), and provides the calculated acceptance rate information to the IMS server distribution unit 400 (step S410).

The IMS server operation unit 300 may calculate the acceptance rate only for the IMS server 500 belonging to the IMS server group received from the IMS server distribution unit 400. In addition, the IMS server operation unit 300 may calculate the acceptance rate of the IMS server in consideration of the type and number of IDs of the Internet phone terminal 100 registered in the IMS server 500. The IMS server operation unit 300 first calculates an acceptance rate of the IMS server 500 based on the number of private-IDs of the Internet phone terminal 100 registered in the IMS server, and differs according to the number of public-IDs. The weighting factor can finally calculate the acceptance rate.

Thereafter, the IMS server distribution unit 400 finally determines an IMS server to be distributed to the Internet telephone terminal 100 in the extracted IMS server group based on the received acceptance rate (step S412), and determines the determined IMS server. Information is provided to the Internet phone service unit 200 (step S414).

Thereafter, the Internet phone service unit 200 provides the received IMS server information to the Internet phone terminal 100 (step S416).

Hereinafter, a method of redistributing an IMS server when an IMS server fails according to an embodiment of the present invention will be described with reference to FIG. 5.

5 is an information flow diagram illustrating an IMS server redistribution method when an IMS server fails according to an embodiment of the present invention.

First, the IMS server operating unit 300 monitors whether the IMS server 500 is broken (step S500), and the internet phone terminal registered in the failed IMS server 500 when a failure occurs in the IMS server 500. Information about the 100 is provided to the Internet telephone service unit 200 (step S502).

Thereafter, the Internet phone service unit 200 requests the IMS server distribution unit 400 to redistribute the IMS server 500 to the Internet phone terminal 100 registered in the failed IMS server 500 (step). S504).

Thereafter, the IMS server distribution unit 400 extracts each of the IMS server groups to be redistributed to each Internet telephone terminal 100, and provides the extracted IMS server group information to the IMS server operating unit 300 (step S506). .

In addition, the IMS server operation unit 300 calculates the acceptance rate for each IMS server 500 (step S508), and provides the calculated acceptance rate information to the IMS server distribution unit 400 (step S510). The IMS server operation unit 300 may calculate the acceptance rate of the IMS server 500 belonging to the IMS server group received from the IMS server distribution unit 400. In addition, the IMS server operation unit 300 may calculate the acceptance rate of the IMS server in consideration of the type and number of IDs of the Internet phone terminal 100 registered in the IMS server 500.

Thereafter, the IMS server distribution unit 400 finally determines an IMS server to be redistributed to the Internet telephone terminal 100 in the extracted IMS server group based on the received acceptance rate (step S512), and determines the determined IMS server. Information is provided to the Internet phone service unit 200 (step S514).

Thereafter, the Internet phone service unit 200 provides the received IMS server information to the Internet phone terminal 100 (step S516).

One embodiment of the present invention can also be implemented in the form of a recording medium containing instructions executable by a computer, such as a program module executed by the computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, computer readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery media.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is an overall configuration diagram of an IP Multimedia Subsystem (IMS) server load balancing system according to an embodiment of the present invention.

2 is an example of a subscriber information table stored in the subscriber information DB 220 according to an embodiment of the present invention.

3 is an example of a storage rate information table stored in a storage rate DB 330 according to an embodiment of the present invention.

4 is an information flow diagram illustrating an IMS server load balancing method when opening an Internet phone according to an embodiment of the present invention.

5 is an information flow diagram illustrating an IMS server redistribution method when an IMS server fails according to an embodiment of the present invention.

* Explanation of symbols on the main parts of the drawings

100: Internet telephone terminal 200: Internet telephone service unit

300: IMS server operation unit 400: IMS server distribution unit

500: IMS server

Claims (13)

In a load balancing system of an IMS (IP Multimedia Subsystem) server in an Internet telephony service, An internet phone terminal manager which receives subscriber information from an internet phone terminal, IMS server operation unit for monitoring the status of the IMS server to calculate the acceptance rate of each IMS server, A server group extracting unit for extracting an IMS server group to be distributed to the Internet telephone terminal based on the subscriber information; A server determination unit that determines, from the extracted IMS server group, an IMS server to be distributed to the Internet telephone terminal based on the acceptance rate; Load balancing system of the IMS server comprising a. The method of claim 1, The subscriber information includes an installation address or telephone number of the Internet telephone terminal, And the server group extracting unit extracts the IMS server group based on the address or telephone number. The method of claim 1, The load balancing system of the IMS server further comprises an acceptance rate calculation unit for calculating the acceptance rate for the IMS server belonging to the extracted IMS server group. The method of claim 3, wherein And the acceptance rate calculation unit calculates the acceptance rate based on the number of subscribers registered in the IMS server and the type of ID. The method of claim 4, wherein The acceptance rate calculation unit calculates an acceptance rate of the IMS server based on the number of Private-IDs registered in the IMS server and according to the number of Public-IDs registered in the IMS server. The load balancing system of the IMS server to determine the acceptance rate of the IMS server by giving different weight to each of the calculated acceptance rate. The method of claim 1, The IMS server operation unit monitors whether the IMS server is broken, If the IMS server is broken, The server group extracting unit extracts the IMS server group to be distributed to the Internet phone terminal registered in the failed IMS server. And the server determining unit determines, from the extracted IMS server group, an IMS server to be distributed to an Internet telephone terminal registered in the failed IMS server based on the acceptance rate. The method of claim 1, And the server deciding portion determines the IMS server before the Internet telephone terminal registers the IMS server for opening an Internet telephone. In the load balancing method of the IMS (IP Multimedia Subsystem) server in Internet telephony service, Receiving subscriber information from an internet phone terminal, Extracting a group of IMS servers to be distributed to the Internet telephone terminal based on the subscriber information; Monitoring the number of subscribers of the IMS server, calculating an acceptance rate of each IMS server based on the number of subscribers; and Determining from the extracted IMS server group an IMS server to be distributed to the Internet telephone terminal based on the acceptance rate; Load balancing method of the IMS server comprising a. The method of claim 8, The subscriber information includes an installation address or telephone number of the Internet telephone terminal, And extracting the server group from the IMS server group based on the installation address or telephone number. The method of claim 8, The calculating of the acceptance rate is a load balancing method of the IMS server to calculate the acceptance rate for the IMS server belonging to the extracted IMS server group. The method of claim 8, And calculating the acceptance rate based on the number and type of subscriber IDs registered in the IMS server. The method of claim 11, The calculating of the acceptance rate may include calculating an acceptance rate of the IMS server based on the number of private-IDs of the Internet telephony terminal registered in the IMS server, and determining the public-ID of the Internet telephony terminal registered in the IMS server. And determining the acceptance rate of the IMS server by assigning different weights to the calculated acceptance rates according to the numbers. The method of claim 8, Monitoring the failure of the IMS server; Extracting an IMS server group to be distributed to an Internet telephone terminal registered in the failed IMS server when the IMS server fails; and Determining, from the extracted IMS server group, an IMS server to be distributed to an Internet telephone terminal registered with the failed IMS server based on the acceptance rate; Load balancing method of the IMS server further comprising.

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