KR20110059027A - Ip address management method and apparatus for dynamically applying ip pool of respective local area - Google Patents

Abstract

PURPOSE: An IP address management method and apparatus for dynamically applying IP pool of a respective local area are provided to efficiently use a limited IP resource which is managed by a DHCP(Dynamic Host Configuration Protocol) server. CONSTITUTION: An IP(Internet Protocol) used amount analysis section(112) creates IP configuration information based on the IP address utilization rate about a plurality of IP pools which is managed by a DHCP server. A server setup changing unit(113) changes the occupation size of a plurality of IP pools by the IP configuration information. The DHCP server manages the IP pools one by one by the region. The server setup changing unit changes the occupation size of the IP pools by the time slot.

Description

IP Address Management Method and Apparatus for Dynamically Applying IP Pool of Respective Local Area}

The present invention relates to a method and a system for managing an IP address, and in particular, an IP address that can be efficiently used without wasting IP resources by dynamically setting limited IP resources managed by a DHCP server in consideration of characteristics of regional IP address usage rates. It relates to a management method and system.

Telecom operators that provide Internet services are currently operating large-scale Internet networks in accordance with their characteristics. In order to use IPTV or Internet telephony as well as simple Internet service based on IP (Internet Protocol) network, IP address is necessary for the terminal used for the service, for example, PC, IPTV set-top box and Internet telephone. . Only when the IP address is set in the terminal, it is possible to receive the Internet service through the IP network provided by the carrier.

At this time, the IP address used can be applied to the terminal in various forms, typically fixed IP and dynamic IP. The fixed IP method is a method of setting a fixed IP address to a terminal when installing the Internet, and the dynamic IP method is a method of obtaining an IP address when accessing an IP network through the DHCP (Dynamic Host Configuration Protocol) method. Refers to a method of fluidly setting the terminal. Dynamic IP method that obtains IP address by DHCP method is generally widely used, and internet service communication service provider operates DHCP server so that subscriber's terminal can be assigned by requesting IP address by applying DHCP method to IP network. .

The DHCP server operates several IP pools for providing IP addresses in IP address request packets of terminals accessing using the DHCP method. The DHCP server may allocate one of the IP addresses that are not pre-assigned from the IP pool to the requesting terminal. At this time, the information on the IP pool to the terminal, along with information such as G / W (gateway), SUBNET MASK, DNS (Domain Name Server) required for access to the IP network is delivered with the IP address.

The Internet service carrier estimates the number of service subscribers (for example, the number of terminals assigned an IP address by DHCP method) for a specific broadcast domain, and the expected maximum number of simultaneous access users, that is, IP at the same time. In consideration of the maximum number of IPs that need address allocation in advance, the size and number of IP pools are set and operated in a DHCP server so that IP addresses can be allocated without lack of IP address requests from terminals. For example, when the expected maximum number of simultaneous access terminals is 90, a 10% margin is added so that 100 IP addresses can be managed in the corresponding IP pool. The extra amount at this time can be flexibly determined by the policy of the Internet service carrier.

In general, the number of available IP addresses is fixed in the DHCP server's IP pool. For example, these 100 IP addresses are always available and ready to use, regardless of whether they are occupied at any given time. Even if none of the 100 IP addresses operated above is assigned, it means that 100 IP addresses are in a standby state and cannot be used for other purposes. The use of IP resources is very rigid.

Due to the rapid rise of the IT industry, many electronic products are connected to the Internet service by connecting to the IP network, and the shortage of IP resources of the existing IPv4 version is revealed due to the explosion of various Internet services. Experts predict that the current system, namely the IPv4 addressing system, will not be able to meet the increasing demand for IP addresses. As an alternative, the introduction of the IPv6 addressing system has led to the identification and supplementation of problems through research and trial application in each field. However, in reality, there are not many things that need to be solved before the IPv6 system can be applied to the entire Internet service.

Therefore, until it is widely used due to the stable application of IPv6, it is a very time to use the IP resource of the current IPv4 system as efficiently as possible.

Accordingly, an object of the present invention is to provide an IP address management method and system that can be efficiently used without wasting limited IP resources managed by a DHCP server.

In addition, based on the characteristics of regional IP address usage, IP address management of the DHCP server can be set dynamically according to the regional time zone, and IP address management can be automatically analyzed for regional IP address utilization to facilitate the dynamic application of IP configuration information. It is to provide a method and system.

First, to summarize the features of the present invention, in accordance with an aspect of the present invention for achieving the object of the present invention, a method for managing an IP address for assigning in a floating IP method to a terminal connected via an IP network is Managing a plurality of IP pools; And changing the occupancy size of each of the plurality of IP pools based on an IP address usage rate for each of the plurality of IP pools.

The plurality of IP pools may be managed one for each region, and the occupancy size of each of the plurality of IP pools may be changed according to time zones.

The plurality of IP pools includes a first IP pool for a commercial area and a second IP pool for a residential area, and swaps the occupancy size of the first IP pool and the occupancy size of the second IP pool with each other at a given time. can do. Here, the replacement may be performed at a predetermined morning time or afternoon time, or the replacement may be performed at different times by separating weekdays and weekends.

Collecting the IP address allocation information from a DHCP server before the changing; And analyzing an IP address utilization rate of each of the plurality of IP pools based on the collected IP address allocation information.

The analyzing may include determining a plurality of time intervals of the IP address usage rate based on a threshold value; And generating IP configuration information including information about an IP pool having a time interval corresponding to an IP address usage rate greater than or equal to the threshold and an IP pool having a time interval corresponding to an IP address usage rate smaller than the threshold.

The occupancy sizes of the first IP pool for the first region and the second IP pool for the second region may be interchanged according to the IP configuration information.

According to the IP configuration information, the settings of the DHCP server and the router may be upgraded so that the occupied sizes of the first IP pool for the first region and the second IP pool for the second region are replaced with IP address information.

According to another aspect of the present invention, an apparatus for managing an IP address for allocating a floating IP method to a terminal connected through an IP network is based on an IP address usage rate for each of a plurality of IP pools managed by a DHCP server. IP usage analysis means for generating IP configuration information; And setting changing means for changing the occupancy size of each of the plurality of IP pools according to the IP configuration information.

According to the IP address management method and system according to the present invention, the IP resource of the DHCP server can be dynamically set according to the time zone of the region based on the characteristics of the region of the IP address utilization rate, and the IP configuration information is automatically analyzed by analyzing the region IP address utilization rate. The dynamic application of can be made easy. Accordingly, it is possible to efficiently use the limited IP resources managed by the DHCP server without wasting.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Like reference numerals in the drawings denote like elements.

1 is a view for explaining the IP address management system 100 according to an embodiment of the present invention.

Referring to FIG. 1, the IP address management system 100 according to an embodiment of the present invention includes a DHCP configuration setting server 110 and a DHCP server 120 and a router connected to an Internet Protocol (IP) network (Internet). (router) 130. The DHCP server 120 manages the IP pool database 12.

The DHCP server 120 may dynamically assign an IP address to a terminal in a dynamic IP manner according to DHCP (Dynamic Host Configuration Protocol) while managing a plurality of IP pools in the IP pool database 12.

The router 130 performs routing so that IP packets can be properly transmitted and received from the source to the destination when a terminal such as a PC, an IPTV set-top box, or an internet phone accesses the IP network through an access point (AP).

Particularly, in the present invention, the DHCP configuration setting server 110 may control to change the occupancy size of each of the plurality of IP pools managed by the DHCP server 120 in the IP pool database 12 according to the IP configuration information. At this time, for example, the size of the occupancy of each of the plurality of IP pools is determined according to IP configuration information (for example, information on region-specific IP pools based on IP address utilization) transmitted from the DHCP configuration setting server 110. In order to change, the settings necessary for the DHCP server 120 and the router 130 may be upgraded through an API (Application Programming Interface) function or a Trivial File Transfer Protocol (TFTP) function.

Based on the configuration of the configuration information for the IP address to the DHCP server 120 and the router 130, the terminal accessing the IP network through the access point (AP) can request the IP address, DHCP server 120 Based on the information on the configured IP configuration can be assigned an IP address to the terminal in a dynamic IP method for each region. For example, the DHCP server 120 may assign one of the IP addresses among the IP pools assigned to the region among the plurality of IP pools managed in the IP pool database 12 to the corresponding terminal. Can be. At this time, the information such as G / W (gateway), SUBNET MASK, DNS (Domain Name Server), etc. necessary for accessing the IP network together with the information on the IP pool to the terminal may be delivered together when the IP address is delivered. Based on the information on the IP configuration set in the region, the router 130 may receive an IP address as described above and route transmission and reception of IP packets to a terminal accessing an IP address in the region's IP pool.

In the present invention, the DHCP server 120 can change the occupancy size of each of the plurality of IP pools based on the IP address usage rate for each of the plurality of IP pools managed in the IP pool database 12. The DHCP server 120 may manage the plurality of IP pools one by one, and change the occupancy size of each of the plurality of IP pools according to time zones. For example, the plurality of IP pools may include an IP pool for a commercial area and an IP pool for a residential area, and at a certain time, the size of the IP pool occupied for the commercial area and the IP pool for the residential area. You can also swap sizes. Here, the replacement time can be done manually at a predetermined morning or afternoon time, or the size of the IP pool occupied for the commercial area and the IP pool occupied for the residential area at different times, separated on weekdays and weekends. It is also possible to make the size change.

2 is a graph for analyzing an IP address usage rate according to time zones. In FIG. 2, 210 is an example of IP address usage for a commercial area, and 220 is an example of IP address usage for a residential area. Regional characteristics may vary, but one example will be explained by dividing them into commercial areas and general residential areas. In the following description, the maximum number of IP addresses assigned to 100 can be explained. However, this is only an example and may be somewhat different from the actual state.

Referring to 210 of FIG. 2, look at an IP usage pattern for a commercial area. For example, in the time of work (08:00 ~ 09:00), the utilization rate of the IP address is rapidly increased in the IP pool set for the region in the DHCP server 120. Around 9:00 am, the IP address usage rate rises sharply from 10% to 90%. In terms of the number of IP addresses, 10 are used and 90 are used. In addition, during the working hours (09:00 ~ 18:00), the IP pool set for the region in the DHCP server 120 almost statically high utilization of IP addresses, for example, 90% of the available IP resources, that is, 90 IP addresses are used. In addition, during the off-hours (18:00 ~ 19:00), the utilization rate of the IP address in the IP pool set for the region in the DHCP server 120 is sharply reduced. Around 6 pm, IP address usage drops sharply from 90% to 10%, and in terms of the number of IP addresses, 90 are used and 10 are used. In addition, the utilization rate of the IP address almost fixedly in the IP pool set in the DHCP server 120 for the region between the time of work (18: 00-19: 00) to the time of work (19: 00-08: 00), For example, 10% of available IP resources, that is, 10 IP addresses are used. Therefore, in such a commercial area, it can be seen that about 90% of IP addresses (90 IP addresses) are wasted in a dormant state between the time of leaving work and the time of leaving work.

Next, referring to 220 of FIG. 2, look at an IP usage pattern for a general residential area. For example, in the time of work (08:00 ~ 09:00), the utilization rate of the IP address in the IP pool set for the region in the DHCP server 120 is sharply reduced. Around 9 am, IP address usage drops sharply from 90% to 10%. By the number of IP addresses, 90 are used and 10 IP addresses are used. In addition, during the working hours (09:00 ~ 18:00), the utilization rate of the IP address almost fixedly in the IP pool set for the region in the DHCP server 120, for example, 10% of the available IP resources, that is, Ten IP addresses are used. In addition, during the off-hours (18:00 ~ 19:00), the utilization rate of the IP address is rapidly increased in the IP pool set for the region in the DHCP server 120. Around 6 pm, the IP address usage spikes from 10% to 90%, and in terms of the number of IP addresses, 10 are used and 90 are used. In addition, the utilization rate of the IP address almost fixedly in the IP pool set in the DHCP server 120 for the region between the time of work (18: 00-19: 00) to the time of work (19: 00-08: 00), For example, 90% of available IP resources, that is, 90 IP addresses are used. Accordingly, it can be seen that about 90% of IP addresses (90 IP addresses) are wasted in a dormant state between the time of work and the time of leaving work in such a general residential area.

As shown in FIG. 2, the commercial area and the general residential area show mutually contrasting IP usage patterns according to respective regional characteristics. As seen above, in commercial areas, 90% of IP addresses (90 IP addresses) are wasted between dormant and rush hours, and in residential areas, 90% between rush hours and leave. IP addresses (90 IP addresses) are wasted in the dormant state. In view of the above, the present invention does not set the IP pool so that the number of allocable IP addresses is fixed in each region, so that the occupied size (number) of IP addresses of each region's IP pool can be set dynamically. It was. For example, the occupancy size of a spare IP address in a second region (eg, a residential area) during a busy time (9 o'clock-18: 00) in the first region (eg commercial area). Set the IP configuration to be allocated to the first region as much as possible, and the IP address may not be available at the time when the second region (for example, the residential area) is busy. The IP configuration can be set up so as to reduce the occupancy size of the IP address of the first region (for example, a commercial region) that is located, and allocate it to the second region by that amount.

For example, in order to assign IP addresses to the first region (for example, a commercial area) and the second region (for example, a residential area) by using a floating IP method, the number of necessary IP addresses has been previously set to 1st. 100 in the region (for example, commercial area) and 100 in the second region (for example, residential area), but 100 in the DHCP server 120 according to the dynamic IP configuration setting method as in the present invention Even if you operate only an IP address (50% of your IP resources), you will be able to cover both regions and assign IP addresses.

In order to apply such a point, in the present invention, as shown in FIG. 3, a plurality of IP pools may be managed for each region in the IP pool database 121 in the DHCP server 120. For example, in a busy time zone (18:00-9:00 the next day) when the IP address is busy in the second region (e.g. residential area), the IP pool (e.g., commercial area) in charge of the first region (e.g., commercial area) A) occupies the IP address 100.100.10.001 to 100.100.10.010 to allocate an IP address to the terminal of the region within the occupancy range, and is in charge of the second region (for example, a residential area) (B). IP pool (B) may occupy the IP address 100.100.10.011 ~ 100.100.10.100 to allocate an IP address to the terminal of the region within the occupancy range.

At this time, when the busy time (9 ~ 18:00) of the IP address is used in the first region (for example, commercial area), the DHCP configuration setting server 110 transmits the IP configuration information to the DHCP server 120 It is possible to control so as to replace the occupancy size of each of the plurality of IP pools managed in the IP pool database 12. At this time, according to the IP configuration information from the DHCP configuration server 110, the router 130 is also upgraded to the occupied size of the IP pool required for routing, accordingly to the terminals connected to the IP address of the corresponding range Routing of IP packets can be performed. For example, according to the IP configuration information from the DHCP configuration setting server 110, when it is such time zone (9:00-18:00), the IP pool A which is in charge of the 1st area (for example, a commercial area) A ) Occupies the IP address 100.100.10.001 ~ 100.100.10.090 to allocate an IP address to the terminal of the region within the occupancy range, and the IP in charge of the second region (for example, the residential area) (B). The pool B may occupy the IP addresses 100.100.10.091 to 100.100.10.100, and the occupancy size of the IP pools may be changed to allocate an IP address to the terminal of the corresponding region within the occupancy range.

As such, the replacement time for the occupied size of the IP pool can be made at a predetermined time, i.e., morning time (eg, 9 am) or afternoon time (eg, 6 pm). In addition, the replacement time may be set differently on weekdays and weekends. For example, on weekdays, the replacement time might be set at 9 am and 6 pm as above, but on weekends the occupancy size of the IP pool is swapped at other times, such as 11 am and 5 pm. It is possible.

Hereinafter, the operation of the DHCP configuration setting server 110 will be described in more detail with reference to FIGS. 4 and 5.

Referring to FIG. 4, the DHCP configuration setting server 110 may include an information collecting unit 111, an IP usage analyzing unit 112, a server setting changing unit 113, and a router setting changing unit 114.

The DHCP configuration setting server 110 sets the IP configuration information including the replacement time (for example, information about the occupancy size of the region-specific IP pool based on the IP address utilization), and thus the DHCP server at the replacement time. Although it is possible to change the occupancy size of each of the plurality of IP pools managed by the 120 or to control the replacement of the occupancy size of any two IP pools, the IP usage analysis unit 112 analyzes the IP address utilization of each IP pool. And determine the time of the change or replacement.

For example, the information collecting unit 111 collects IP address allocation information from the DHCP server 120 (see S510 of FIG. 5). Whenever the DHCP server 120 assigns an IP address to a terminal, the DHCP server 120 transmits IP address allocation information to the information collection unit 111 so that the DHCP server 120 knows the usage of the IP address currently being used in each IP pool. Can be.

Accordingly, the IP usage analyzing unit 112 may analyze the IP address utilization rate of each of the plurality of IP pools managed in the database 121 as shown in FIG. 2 based on the IP address allocation information collected by the information collecting unit 111. (See S520 of FIG. 5). Through such analysis, the IP usage analysis unit 112 may generate IP configuration information based on the IP address usage rate for each of the plurality of IP pools managed by the DHCP server 120 (see S530 of FIG. 5).

The IP configuration information is information for changing (or replacing) the occupancy size of each of the plurality of IP pools managed in the database 121 at a predetermined time based on the IP address utilization as shown in FIG. 2, and corresponding change (or replacement) time. Information may include information about the size of the IP pool occupied by region.

For example, the IP usage analyzer 112 may determine a plurality of time intervals of the IP address usage rate as shown in FIG. 2 based on the threshold value. For example, the threshold can be set to 40%, 50%, etc. As a result, in the first region (e.g., commercial area), the time interval during which the IP address is busy (9:00-18:00) and when it is not The interval (18:00 to 9:00 the next day) may be determined. In addition, in the second region (for example, a residential area), a time interval (18:00 to 9:00 the next day) where the IP address is used may be determined, and a time interval (9:00 to 18:00) that is not. In response to the determination of the time intervals, the IP usage analyzer 112 determines the IP pool having a time interval corresponding to the IP address utilization rate higher than or equal to the threshold for the plurality of IP pools managed in the database 121 and smaller than the threshold. IP configuration information including information on IP pools having a time interval corresponding to the IP address usage rate (including information on the occupancy size of each IP pool) may be generated.

According to the generation of such IP configuration information, the server setting changing unit 113 may change the occupancy size of each of the plurality of IP pools managed in the database 121 of the DHCP server 120 (see S530 of FIG. 5). . In addition, the router setting changing unit 114 routes the transmission and reception of IP packets to a terminal connecting to an IP address in the occupancy range of the changed IP pool (s) by changing the setting of the occupancy size of the IP pool (s) covering the region. You can do it. For example, according to the above IP configuration information transmitted from the IP usage analysis unit 112, through the API (Application Programming Interface) function, etc. can upgrade the settings required for the IP address allocation of the DHCP server 120, TFTP It is possible to upgrade the settings necessary for performing the routing of the router 130 through a (Trivial File Transfer Protocol) function.

According to the change of the IP configuration related settings of the server setting changing unit 113 and the router setting changing unit 114 as described above, the first IP pool for the first region (for example, a commercial region) of the DHCP server 120. The occupancy sizes of the second IP pool for the second and second regions (eg, residential areas) can be interchanged. Accordingly, DHCP server 120 and router 130 occupy the first IP pool for the first region (eg, commercial area) and the second IP pool for the second region (eg, residential area). The IP service can be performed according to the IP address information (see FIG. 3) whose sizes are interchanged.

For example, in a time zone (18:00 to 9:00 the next day) when the IP address is busy in the second region (for example, a residential area), as shown in FIG. 3, the first region (for example, a commercial area) is selected. The IP pool in charge (A) can occupy the IP address 100.100.10.001 ~ 100.100.10.010 to allocate the IP address to the terminal of the region within the occupancy range, the second region (for example, residential area) ( IP pool (B) in charge of B) may occupy the IP address 100.100.10.011 ~ 100.100.10.100 to allocate the IP address to the terminal of the region within the occupancy range.

In this case, as the IP configuration related settings of the DHCP server 120 and the router 130 are changed at a predetermined time according to the IP configuration information as described above, a large amount of IP addresses are used in the first region (for example, a commercial region). In the time zone (9:00-18:00), as shown in Fig. 3, the IP pool A, which is in charge of the first region (e.g., commercial area), occupies the IP address 100.100.10.001-100.100.10.090, The IP address can be allocated to the terminal within its occupancy range, and the IP pool B which is in charge of the second region (for example, residential area) B occupies the IP addresses 100.100.10.091 to 100.100.10.100. An IP address can be allocated to a terminal of a corresponding region within its occupancy range.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a view for explaining an IP address management system according to an embodiment of the present invention.

2 is a graph for analyzing an IP address usage rate according to time zones.

3 is a view for explaining the structure of a database for IP pool management by region of a DHCP server according to an embodiment of the present invention.

4 is a detailed block diagram of a DHCP configuration setting server according to an embodiment of the present invention.

5 is a flowchart illustrating an operation of a DHCP configuration setting server according to an embodiment of the present invention.

Claims (8)

A method of managing an IP address for allocating a floating IP method to a terminal connected through an IP network, Managing a plurality of IP pools; And Changing the occupancy size of each of the plurality of IP pools based on an IP address usage rate for each of the plurality of IP pools IP address management method comprising a. The method of claim 1, And managing the plurality of IP pools one by one and changing the occupancy size of each of the plurality of IP pools according to time zones. The method of claim 1, The plurality of IP pools includes a first IP pool for a commercial area and a second IP pool for a residential area, and swaps the occupancy size of the first IP pool and the occupancy size of the second IP pool with each other at a given time. IP address management method characterized in that. The method of claim 1, wherein before the changing step: Collecting IP address assignment information from a DHCP server; And Analyzing an IP address utilization rate of each of the plurality of IP pools based on the collected IP address allocation information; IP address management method comprising a. The method of claim 4, wherein the analyzing comprises: Determining a plurality of time intervals of the IP address usage rate based on a threshold value; And Generating IP configuration information including information about an IP pool having a time interval corresponding to an IP address utilization rate higher than the threshold and an IP pool having a time interval corresponding to an IP address utilization rate smaller than the threshold value; IP address management method comprising a. The method of claim 5, And an occupancy size of the first IP pool for the first region and the second IP pool for the second region according to the IP configuration information. The method of claim 5, Upgrading the settings of the DHCP server and the router so that the occupied sizes of the first IP pool for the first region and the second IP pool for the second region are serviced with exchanged IP address information according to the IP configuration information. How to manage IP addresses. An apparatus for managing an IP address for assigning a floating IP method to a terminal connected through an IP network, IP usage analysis means for generating IP configuration information based on an IP address usage rate for each of a plurality of IP pools managed by a DHCP server; And Setting changing means for changing an occupancy size of each of the plurality of IP pools according to the IP configuration information IP address management device comprising a.

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