KR100765238B1 - Method for obtaining dns information of mobile terminal and mobile terminal thereof - Google Patents

Method for obtaining dns information of mobile terminal and mobile terminal thereof Download PDF

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Publication number
KR100765238B1
KR100765238B1 KR1020060080458A KR20060080458A KR100765238B1 KR 100765238 B1 KR100765238 B1 KR 100765238B1 KR 1020060080458 A KR1020060080458 A KR 1020060080458A KR 20060080458 A KR20060080458 A KR 20060080458A KR 100765238 B1 KR100765238 B1 KR 100765238B1
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South Korea
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dns
information
domain
dns information
ip address
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KR1020060080458A
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Korean (ko)
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김승현
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엘지전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/15Directories; Name-to-address mapping
    • H04L61/1505Directories; Name-to-address mapping involving standard directories or standard directory access protocols
    • H04L61/1511Directories; Name-to-address mapping involving standard directories or standard directory access protocols using domain name system [DNS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/15Directories; Name-to-address mapping
    • H04L61/1552Mechanisms for table lookup, e.g. between directories; Directory data structures; Synchronization of directories
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/20Address allocation
    • H04L61/2076Address allocation involving update or notification mechanisms, e.g. update of a domain name server with dynamic host configuration protocol [DHCP] assigned addresses

Abstract

A method for acquiring DNS(Domain Name System) information of a mobile terminal, and a mobile terminal therefor are provided to acquire DNS information regarding a domain desired to be connected even in spite of a network failure or a DNS server failure, and effectively use radio resources. A storage unit(150) stores an IP address corresponding to a domain previously connected through a network in a database. A wireless communication unit(130) performs radio communication through the network. A controller(170) detects an IP(Internet Protocol) address by searching the storage unit for a connection to a particular domain, and when the IP address corresponding to the particular domain does not exist in the storage unit, the controller communicates with a DNS server through the wireless communication unit to acquire the IP address. The controller updates the database of the storage unit according to whether or not the DNS information is acquired through communication with the DNS server.

Description

이동통신단말의 DNS 정보 획득방법 및 이를 위한 이동통신단말기 {Method for obtaining DNS information of mobile terminal and mobile terminal thereof} Way to Go acquired DNS information of the communication terminal and a mobile terminal therefor {Method for obtaining DNS information of mobile terminal and mobile terminal thereof}

도 1은 본 발명의 일 실시예에 따른 이동통신 단말의 DNS 정보 획득 방법이 적용되는 환경을 나타낸 도면이다. 1 is a view showing the environment, the DNS information obtaining method of a mobile communication terminal according to an embodiment of the present invention is applied.

도 2는 본 발명의 일 실시예에 따른 DNS 정보 획득 방법을 수행하는 이동통신단말을 나타낸 블록도이다. Figure 2 is a block diagram illustrating a mobile communication terminal performing a DNS information acquisition method according to an embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 DNS 정보 획득 방법을 나타낸 흐름도이다. Figure 3 is a flow diagram illustrating a DNS information acquisition method according to an embodiment of the present invention.

<도면 주요 부분에 대한 부호의 설명> <Drawings Description of the Related>

100: 이동통신단말 110: 입력부 100: mobile communication terminal 110: input unit

130: 무선통신부 150: 메모리 130: radio communication unit 150: memory

170: 제어부 200: DNS 서버 170: control unit 200: DNS server

300: 대상 서버 300: the target server

본 발명은 이동통신단말의 DNS 정보 획득 방법 및 이를 위한 이동통신단말에 관한 것으로, 특히 DNS 쿼리(domain name system query)의 성공률 제고를 위한 DNS 정보 획득 방법 및 이를 위한 이동통신단말기에 관한 것이다. The present invention relates to a method obtaining DNS information of the mobile communication terminal and relates to a mobile communication terminal therefor, and more specifically, to obtain DNS information for improving the success rate of the DNS query (domain name system query) method and a mobile terminal therefor.

이동통신 기술이 비약적으로 발전함에 따라 음성통화 위주의 이동통신 기술에서 무선망을 이용한 데이터 통신이 일반화되었다. The data was generalized communication using a wireless network in the voice call-oriented mobile communication technology develops by leaps and bounds, as the mobile communication technology.

특히, 최근에 상용화가 이루어지고 있는 제3세대 무선통신기술을 적용한 이동통신단말은 기지국 제어기를 통해, 외부의 패킷 데이터 망인 인터넷과의 논리적 인터페이스를 담당하는 SGSN(serving GPRS support node)노드 및 라우팅 정보를 관리하는 GGSN(gateway GPRS support node)노드와 연결되어, 외부망과 데이터 패킷을 송수신한다. In particular, the mobile communication terminal applied to the third generation wireless communication technology in recent commercialization is made to the SGSN (serving GPRS support node) node and routing information via the base station controller, responsible for the logical interface to the external packet data mangin Internet It is connected to the GGSN (gateway GPRS support node) node for managing transmits and receives the external network and the packet data.

인터넷과 같은 일반적인 외부망에서는 연결된 각각의 객체가 고유 IP 주소를 가지고 있으며, 이러한 IP주소는 예를 들면 32비트의 숫자로 표시된다. In general an external network such as the Internet, and each object associated with a unique IP address, this IP address, for example, is represented by a 32-bit number. 그러나, 이러한 숫자로 구성된 IP주소는 사용자 입장에서는 사용하기 불편하므로 도입된 개념이 도메인 이름(Domain Name)으로서 일반적으로 영문을 기본으로 하는 단어 또는 약어로 구성된다. However, the numeric IP address is configured to the user's standpoint, as the introduction of the concept so difficult to use the domain name (Domain Name) typically consists of a word or acronym that in English by default.

그러나, 이동통신단말에서 실행되고 있는 응용프로그램이 외부망과 연결되어 데이터를 송수신하기 위해서는 도메인 이름에 해당하는 객체의 IP 주소를 획득하여야 한다. However, in order to send and receive data, the application running on the mobile communication terminal is connected to the external network to be obtained the IP address of the object corresponding to the domain name.

이를 위해, 이동통신단말은 DNS 서버로 DNS 쿼리(domain name service query)를 전송함으로써 도메인 이름에 해당하는 객체의 IP 주소에 대한 정보를 획득한다. For this purpose, the mobile communication terminal to obtain information about the IP address of the object corresponding to the domain name by sending a DNS query (domain name service query) to DNS servers.

그러나, DNS 서버를 통해 IP 주소를 획득하는 방식은 불필요한 시간 소모가 많을 뿐만 아니라 네트워크 장애나 DNS 서버 장애시에는 IP 주소를 획득할 수 없어 해당 도메인에 접속할 수 없는 문제점이 있다. However, through the DNS server how to obtain an IP address can not be obtained, the IP address on the network, as well as a lot of unnecessary time-consuming disorder or DNS server fails, there is a problem you can not connect to the domain.

따라서, 종래에는 이동통신단말에 DNS 캐쉬를 마련하여, 이동통신단말에서 사용되었던 도메인 이름과 대응하는 IP 주소를 저장하고, 이후 동일한 도메인 이름에 대한 DNS 쿼리가 발생하면 DNS 캐쉬를 검색하여 해당 도메인 이름에 대한 IP 주소를 획득하는 방식을 사용하고 있다. Therefore, conventionally, the mobile communication by the terminal providing the DNS cache, the mobile stores domain names and corresponding IP addresses that have been used in a communication terminal, since when a DNS query for the same domain name generated domain that searches the DNS cache name and using the method of obtaining the IP address for.

그러나, DNS 캐쉬는 그 용량에 제한이 있어 통상 5개 정도의 제한적인 개수의 도메인 이름에 대한 IP 주소만을 저장할 수 있으므로, DNS 캐쉬에 저장되어 있지 않은 다수의 도메인 이름에 대해 DNS 쿼리가 발생하는 경우에는 DNS 서버를 통해 IP 주소를 획득하는 방식을 사용하여야 하며, 이에 따라 상술한 바와 같은 시간 소모, 도메인에의 접속 불가능 등의 문제점이 발생할 수 있다. However, DNS cache is if the DNS query occurs for a large number of domain names that are not, stored in the DNS cache, so you can only store the IP address for the domain name of the normal limited number of about 5 There are restrictions on the capacity may cause problems, such as the method must be used to obtain an IP address through a DNS server, and therefore time-consuming, not connected to the same domain as described above.

본 발명의 목적은, 상기 문제점을 해결하기 위한 것으로, 네트워크 장애나 DNS 서버 장애시에도 해당 도메인에 접속할 수 있도록 DNS 정보를 획득하는 이동통신단말의 DNS 정보 획득방법 및 이를 위한 이동통신단말을 제공함에 있다. An object of the present invention has been made to solve the above problems, a mobile communication terminal for obtaining a DNS information to connect to a domain in the event of a network failure or a DNS server failure acquired DNS information, a method and a mobile communication terminal to provide for this, have.

상기 목적을 달성하기 위한 본 발명의 일측면에 의하면, 네트워크를 통해 특정 도메인에 접속하고자 하는 이동통신단말의 DNS 정보 획득 방법이 제공된다. According to an aspect of the invention for achieving the above object, a method obtaining DNS information of the mobile communication terminal it is provided to be connected to a specific domain through a network. 본 이동통신단말의 DNS 정보 획득 방법은, 상기 이동통신단말의 휘발성 메모리에 마련 되어 복수의 도메인에 대한 DNS 정보를 저장하는 DNS 캐쉬에서 특정 도메인에 대한 특정 DNS 정보를 검색하는 단계, 상기 DNS 캐쉬로부터 상기 특정 DNS 정보가 검색되지 않으면, 상기 이동통신단말의 비휘발성 메모리에 마련되어 DNS 정보를 저장하는 DNS 데이터 베이스에서 상기 특정 DNS 정보를 검색하는 단계, 및 상기 DNS 데이터 베이스로부터 상기 특정 DNS 정보가 검색되지 않으면, 상기 네트워크를 통해 DNS 정보를 제공하는 DNS 서버와 통신하여 상기 특정 DNS 정보를 획득하는 단계를 포함한다. DNS information acquisition method of the mobile communication terminal, is provided in the volatile memory of the mobile terminal from the step of searching for specific DNS information about a specific domain in the DNS cache to store the DNS information of a plurality of domains, wherein the DNS cache If the specific DNS information is not detected, retrieving the specific DNS information from the DNS database to store the DNS information provided in the non-volatile memory of the mobile phone, and not the specific DNS information retrieved from the DNS database If, to communicate with the DNS server for providing DNS information over the network comprises the step of obtaining the specific DNS information.

바람직하게는, 상기 DNS 데이터 베이스는 복수의 도메인 이름 및 이에 대응하는 IP 주소를 포함하는 DNS 정보를 목록화하여 룩업테이블로서 저장한다. Preferably, the DNS database and lists the DNS information including a plurality of domain names and corresponding IP addresses to be stored as a look-up table.

더욱 바람직하게는, 상기 룩업테이블은, 상기 DNS 서버와의 통신을 통한 상기 DNS 정보의 획득 여부에 따라 업데이트된다. More preferably, the look-up table is updated according to whether or not the acquired DNS information through communication with the DNS server.

또한, 본 발명의 다른 측면에 따르면, 네트워크를 통해 기접속된 도메인에 대응하는 IP 주소를 데이터 베이스로서 저장하는 저장부, 상기 네트워크를 통한 무선 통신을 수행하는 무선 통신부, 특정 도메인에 대한 접속을 위해 상기 저장부를 검색하여 상기 IP 주소를 검출하며, 상기 특정 도메인에 대응하는 IP 주소가 상기 저장부에 존재하지 않는 경우에는 상기 무선통신부를 통해 DNS 서버와 통신하여 상기 IP 주소를 획득하는 제어부를 포함하는 이동통신단말이 제공된다. Further, according to another aspect of the invention, a storage unit for storing an IP address corresponding to the domain access group through a network, a database, a wireless communication unit that performs radio communication via the network, for access to the particular domain the search unit said storage, and detects the IP address, if the IP address corresponding to the particular domain is not present in the storage unit has to communicate with the DNS server through the wireless communication unit to a control unit for acquiring the IP address, the mobile communication terminal is provided.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다. With reference to the accompanying drawings will be described a preferred embodiment of the present invention;

도 1은 본 발명의 일 실시예에 따른 이동통신 단말의 DNS 정보 획득 방법이 적용되는 환경을 나타낸 도면이다. 1 is a view showing the environment, the DNS information obtaining method of a mobile communication terminal according to an embodiment of the present invention is applied.

이동통신단말(100)은 인터넷과 같은 외부 네트워크(1)에 연결되어 웹 컨텐츠 서버와 같은 대상 서버(300)와 무선 데이터 통신을 수행한다. The mobile communication terminal 100 is connected to the external network 1 such as the Internet, and performs wireless data communication with the destination server 300, such as Web content server. 이를 위해 이동통신단말(100)은 대상 서버(300)의 도메인 이름을 포함하는 DNS 쿼리(domain name system query)를 DNS 서버(200)에 전송하고 대상 서버(300)의 DNS 정보를 수신한다. To this end, the mobile terminal 100 sends a DNS query (domain name system query) that includes the domain name of the server (300) to the DNS server 200 and receive information from the target DNS server (300).

도 2는 본 발명의 일 실시예에 따른 DNS 정보 획득 방법을 수행하는 이동통신단말을 나타낸 블록도이다. Figure 2 is a block diagram illustrating a mobile communication terminal performing a DNS information acquisition method according to an embodiment of the present invention.

도 1을 참조하여 설명하면, 본 발명의 일실시예에 따른 이동통신단말(100)은 입력부(110), 무선통신부(130), 저장부(150) 및 제어부(170)를 포함한다. Referring to FIG 1, the mobile communication terminal 100 according to one embodiment of the present invention includes the input unit 110, a wireless communication unit 130, a storage unit 150 and control unit 170.

입력부(110)는 이동통신단말로 입력되는 각종 데이터를 제어부(170)로 인가한다. Input unit 110 is applied to various kinds of data to be input to the mobile communication terminal to the control unit 170. The

무선통신부(130)는 제어부(170)의 제어에 따라 상대 통화자와의 전화통화를 위해 음성신호를 송, 수신하고, 무선 데이터 통신을 위한 정보를 송, 수신하는 역할을 수행한다. A wireless communication unit 130 serves to transmit and receive the voice signals to a telephone call with the mating party, and send and receive, information for wireless data communication in accordance with the control of the controller 170. 특히, 무선통신부(130)는 DNS 쿼리를 고주파 무선통신규격에 적합하도록 처리하여 송신하고 해당 DNS 쿼리에 대한 응답을 수신하여 제어부(170)로 전달한다. In particular, the wireless communication unit 130 transmits to processing so as to fit a DNS query to a high-frequency wireless communication standard, and transmitted to the control unit 170 receives a response to the DNS query.

저장부(150)는 제어부(170)의 제어 동작을 위해 필요한 각종 동작 프로그램, 시스템 프로그램을 저장하고, 무선 데이터 통신을 위한 각종 정보, 디바이스 드라이버, 및 프로그램들을 저장한다. The storage unit 150 stores various kinds of information, device drivers, and programs for storing various operating programs, a system program required to control operations of the controller 170, and wireless data communication. 특히, 저장부(150)는 기사용된 DNS 정보를 일시 저장하는 DNS 캐쉬(151)와 기사용된 DNS 정보를 목록화하여 저장하는 DNS 데이터 베이스(153)를 포함한다. In particular, the storage unit 150 is a group comprising a DNS database 153 for storing the lists for the DNS information group using the DNS cache 151 to temporarily store the DNS information is used. DNS 정보는 해당 도메인에 접속하기 위해 해당 도메인 이름 및 이에 대응하는 IP 주소 등을 포함한다. The DNS information, including the domain name and corresponding IP address to connect to the domain.

DNS 캐쉬(151)는 소정 개수의 DNS 정보를 휘발성 메모리에 일시 저장한다. The DNS cache 151 temporarily store the DNS information of a predetermined number in the volatile memory. DNS 캐쉬(151)에 저장되는 DNS 정보의 개수는 메모리 용량에 따라 조정하여 설정될 수 있으며, 예를 들면 5개 정도가 될 수 있다. The number of DNS information that is stored in the DNS cache 151 may be set to adjust in accordance with memory capacity, for example, be on the order of five. 또한, DNS 캐쉬(151)에 저장된 DNS 정보의 개수가 상기 개수를 초과하면, 소정의 우선 순위에 따라 저장된 DNS 정보 중 일부를 삭제하는 방식을 적용할 수 있다. Further, if the number of DNS information that is stored in the DNS cache 151 is greater than the number, it is possible to apply the method to remove some of the DNS information is stored in accordance with a predetermined priority. 이 경우 우선 순위로는 예를 들면 사용 시점을 사용할 수 있으며 사용 시점이 최근일 수록 높은 우선 순위를 부여하면, 사용 시점이 가장 경과한 DNS 정보가 먼저 DNS 캐쉬(151)로부터 삭제된다. In this case, priority is, for example, and can use the point-of-use point-of-use when the recording choegeunil given priority, the DNS information by the use time has elapsed is first removed from the DNS cache 151. 또한, DNS 캐쉬(151)에 저장된 각각의 DNS 정보는 기설정된 시간이 경과하면 삭제된다. In addition, each of the DNS information that is stored in the DNS cache 151 is deleted when the set time period has elapsed.

DNS 데이터 베이스(153)는 기사용된 DNS 정보를 목록화하여 룩업 테이블로서 비휘발성 메모리에 저장한다. DNS database 153 lists the DNS information using group will be stored in non-volatile memory as a lookup table. DNS 정보가 저장되는 룩업 테이블은 저장된 항목 번호, 도메인 이름, 대응되는 IP 주소, 해당 항목의 IP 주소가 사용된 회수, DNS 쿼리가 성공한 회수, DNS 쿼리에 대한 미응답 등으로 인해 DNS 쿼리가 실패한 회수 등의 정보를 저장하는 것이 바람직하다. DNS lookup table that stores information is stored in the item number, domain name, and the corresponding IP address, the IP address of the item using recovered, the recovery, the DNS query is successful, recovery due to non-response, such as for DNS queries a DNS query fails to store information, such as preferred.

다음의 표 1은 DNS 데이터 베이스(153)에 저장되는 룩업 테이블의 일 예이다. The following Table 1 is an example of a look-up table stored in the DNS database 153.

번호 number 쿼리 성공 Query successful 쿼리 실패 Query Failed 도메인 domain IP IP
1 One 10 10 20 20 www.111.com www.111.com 161.xxx.xxx.xxx 161.xxx.xxx.xxx
2 2 8 8 10 10 www.222.com www.222.com 162.xxx.xxx.xxx 162.xxx.xxx.xxx

표 1에는 편의상 두 개의 도메인만을 표시하였으나 비휘발성 메모리의 용량및 시스템이 허용하는 개수만큼 도메인에 대한 DNS 정보가 룩업 테이블에 저장될 수 있다. Table 1 can be DNS information for the domain number for the sake of convenience as long as the capacity of the system and a non-volatile memory, but show only two domains, it allows to store in a look-up table.

표 1을 참조하면, 해당 도메인에 대해 쿼리 성공 회수는 이동통신단말(100)이 DNS 서버(200)로부터 DNS 쿼리에 대한 결과를 수신한 회수를 의미하며, 쿼리 실패 회수는 네트워크의 장애 또는 DNS 서버(200) 장애 등의 이유로 DNS 쿼리에 대한 결과를 수신하지 못한 회수를 의미한다. Referring to Table 1, the query number of successes for that domain is meant the number of times the mobile communication terminal 100 receives the result of the DNS query, the DNS server 200, and query failure recovery failure, or the DNS server in the network 200 for reasons such as failure means the number of times does not receive the result of the DNS query.

여기서, DNS 데이터 베이스(153)는 비휘발성 메모리에 저장되므로 비교적 저장 용량에 제한이 없어 많은 양의 데이터를 저장할 수 있으나 저장 용량에 제한이 있는 경우에는, 예를 들면 DNS 쿼리에 대한 성공 회수가 가장 작은 항목 또는 실패 회수가 가장 작은 항목 또는 해당 DNS 정보의 사용 회수등의 순으로 기존 정보를 삭제하고 새로운 정보를 저장하는 방식이 사용될 수 있다. Here, DNS database 153 is not a limit on the relative storage capacity stored in non-volatile memory in the case can store a large amount of data, but with limited storage capacities, e.g., number of successes of the DNS query is the small items or failure of a number of existing information in order to delete such items, or use the smallest number of appropriate DNS information and can be used how to store the new information.

제어부(170)는 이동통신단말(100)의 전반적인 동작을 제어한다. The controller 170 controls the overall operation of the mobile communication terminal 100. 특히, 제어부(170)는 입력부(110)를 통해 소정의 도메인에 대한 접속을 요청하는 명령이 입력되어 DNS 쿼리가 발생하면 이에 따라 해당하는 도메인 이름에 대응하는 IP 주소를 획득하기위해, 일차적으로 DNS 캐쉬(151)를 검색하고, DNS 캐쉬(151)에 해당 도메인에 대응하는 IP 주소가 존재하지 않으면 이차적으로 DNS 데이터 베이스(153)를 검색한다. In particular, the control unit 170 when the the command is input DNS query for requesting access for a given domain through the input unit 110 occurs in order to obtain the IP address corresponding to the domain name that corresponds accordingly, primarily DNS search the cache 151, and the IP address corresponding to a domain in the DNS cache 151 does not exist secondarily searches the DNS database 153. 그러나, DNS 데이터 베이스(153)에도 대응하는 IP주소가 존재하지 않으면 제어부(170)는 DNS 쿼리를 생성하여 DNS 서버(200)로 전송한다. However, unless the IP addresses that correspond to DNS database 153 exists controller 170 generates a DNS query is sent to the DNS server 200.

제어부(170)는 상기한 바와 같이 도메인 이름에 대응하는 IP 주소를 획득하기 위해 일련의 처리과정을 수행하기 위한 이동통신 처리부(171), 응용프로그램 처리부(173), 및 DNS 쿼리 처리부(175)를 포함한다. The controller 170 is a mobile communication processing unit 171, the application processing unit 173, and the DNS query processing unit 175 for performing a series of processes to obtain the IP address corresponding to the domain name as described above, It includes.

이동통신 처리부(171)는 이동통신단말(100)에서 무선자원을 활용하여 이동통신서비스를 수행하기 위한 모듈로서 공지의 이동 통신 기술을 사용하여 구성되어 동작함에 따라 여기에서는 상세한 설명을 생략한다. A mobile communication processing unit 171 is here, as is configured with a mobile communication technology, a well-known operation as a module for performing mobile communication service by using a radio resource in a mobile communication terminal 100 and detailed description thereof will not be given.

응용프로그램 처리부(173)는 무선 데이터 통신을 수행하는 응용 프로그램을 처리하고, 해당 응용 프로그램을 통해 소정의 도메인에 접속하여 데이터 통신을 수행하기 위해 도메인 이름과 같은 정보와 응용 프로그램 식별자를 포함하는 DNS 쿼리를 출력한다. Application processing unit 173 is the DNS query containing the information and the application identifier, such as a domain name in order to process the application for performing wireless data communication, and connected to the predetermined domain from the application to perform the data communication the outputs.

DNS 쿼리 처리부(175)는 응용프로그램 처리부(173)에서 출력된 DNS 쿼리를 전달받아 도메인 이름을 추출하고 DNS 캐쉬(151) 또는 DNS 데이터 베이스(153)를 검색하거나, DNS 캐쉬(151) 및 DNS 데이터 베이스(153)로부터 해당 도메인 이름에 대응하는 IP 주소가 검색되지 않은 경우 전달받은 DNS 쿼리를 DNS 서버(200)로 전송하도록 처리한다. DNS query processor 175 receives a DNS query is output from the application processing unit 173 extracts a domain name, and searches the DNS cache 151 or a DNS database 153, or, DNS cache 151 and DNS data the processing from the base 153, the IP address corresponding to the domain name to send a DNS query received if it is not detected by the DNS server 200. the 또한, DNS 쿼리 처리부(175)는 DNS 서버(200)로 부터 수신된 DNS 쿼리에 대한 응답으로부터 해당 도메인 이름과 대응하는 IP 주소 등을 포함하는 DNS 정보를 추출하고, DNS 캐쉬(151) 및 DNS 데이터 베이스(153)를 업데이트한다. In addition, DNS query processing unit 175 extracts the DNS information including a domain name and corresponding IP address, such as from a response to a DNS query received from the DNS server 200, the DNS cache 151 and DNS data It updates the base 153.

도 3은 본 발명의 일실시예에 따른 DNS 정보 획득 방법을 나타낸 흐름도이다. Figure 3 is a flow diagram illustrating a DNS information acquisition method according to an embodiment of the present invention.

본 발명의 일 실시예에 따른 DNS 정보 획득 방법에 따르면, 이동통신단말(100)의 제어부(170)는 입력부(110)를 통해 특정 도메인에 대한 접속 명령이 입력되면 이에 따라 응용프로그램 처리부(173)를 통해 DNS 쿼리가 발생되었는지 여부를 확인한다(S411). According to the acquired DNS information method according to one embodiment of the invention, the control unit 170 The application processing unit 173 in accordance with when the connection command for a specific domain, inputted through the input unit 110 of the mobile terminal 100 Check whether the DNS query occurs (S411) through.

DNS 쿼리가 발생하면, 제어부(170)는 DNS 쿼리를 DNS 쿼리 처리부(175)로 전달하며, DNS 쿼리 처리부(175)는 DNS 캐쉬를 검색하여(S413) 해당하는 특정 도메인에 대응하는 IP 주소가 존재하는지 확인한다(S415). If the DNS query is generated, the controller 170 transfers a DNS query to the DNS query processing unit 175, a DNS query processing section 175 is the IP address exists, corresponding to a particular domain that corresponds to search the DNS cache (S413) Check that (S415).

DNS 캐쉬(S413)에 상기 특정 도메인에 대응하는 IP 주소가 저장되어 있지 않으면, DNS 쿼리 처리부(175)는 DNS 데이터 베이스(153)의 룩업테이블을 검색하여(S417) 해당하는 특정 도메인에 대응하는 IP 주소가 존재하는지 확인한다(S419). If the DNS cache (S413) said is not the IP address is stored corresponding to a particular domain, DNS query processing section 175 is an IP corresponding to a particular domain to search a look-up table in the DNS database 153, and the (S417) Make sure the address exists (S419).

DNS 데이터 베이스(153)에 해당하는 특정 도메인에 대응하는 IP주소가 존재하지 않으면, DNS 쿼리 처리부(175)는 DNS 쿼리를 무선 통신부(130)를 통해 DNS 서버(200)에 전송하도록 한다(S421). If the IP address corresponding to the specific domain for the DNS database 153 exists, the DNS query processing section 175 to through the wireless communication unit 130, a DNS query is sent to the DNS server (200) (S421) .

제어부(170)는 DNS 서버(200)로부터 상기 DNS 쿼리에 대한 결과 응답이 수신되는지를 판단한다(S423). Control unit 170 determines whether the result of a response is received with respect to the DNS query, the DNS server (200) (S423).

DNS 서버(200)로부터 상기 DNS 쿼리에 대한 결과 응답이 수신되면, 무선통신부(130)는 해당 응답을 DNS 쿼리 처리부(175)로 전달하고, DNS 쿼리 처리부(175)는 해당 응답으로부터 IP주소를 추출하여 응용프로그램 처리부(173)에 전달하여 해당 IP 주소로 접속을 시도하도록 하고, DNS 캐쉬(151)에서 사용 시점이 가장 경과한 도메인에 대응하는 IP주소를 포함하는 DNS 정보를 삭제하고 해당 응답에 포함된 도메인 이름과 대응하는 IP 주소를 저장하여 DNS 캐쉬(151)를 업데이트한다(S425). When the DNS server 200 receives the result in response to the DNS query, the wireless communication unit 130 may forward the response to the DNS query processing section 175 and, DNS query processing section 175 extracts the IP address from the response to forward to the application processing unit 173, and to attempt to connect to that IP address, and to delete the DNS information including the IP address corresponding to the domain, the use time of the lapse in the DNS cache 151 to include in the response the stores the domain name and corresponding IP address to update the DNS cache (151) (S425).

그리고, DNS 쿼리 처리부(175)는 DNS 쿼리에 대한 응답이 수신된 경우 뿐만 아니라 수신되지 않은 경우에도 DNS 쿼리에 포함된 도메인 이름에 대응하는 항목에서 DNS 쿼리의 성공 여부를 포함한 정보들을 변경하여 룩업테이블을 업데이트한다(S427). And, DNS query processing unit 175 is a lookup table to change the information, including the success of a DNS query from a corresponding entry, even if they are not received as well as when a response to the DNS query is received by the domain name contained in the DNS query the update (S427).

그러나, 상기 특정 도메인에 대응하는 IP 주소가 DNS 캐쉬(151) 또는 DNS 데이터 베이스에 존재하는 경우에는, DNS 쿼리 처리부(175)는 해당 IP 주소를 검출하여 응용프로그램 처리부(173)로 전달하고 즉시 해당 IP 주소로 접속을 시도하도록 한다(S429). However, the delivery to the case where the IP address, the DNS cache 151 or in the DNS database, DNS query processing section 175 detects the IP address, the application processing unit 173 corresponding to the specific domain, and immediately the and to try to connect to an IP address (S429).

따라서, DNS 쿼리가 발생한 경우 이동통신단말(100)에 마련된 DNS 캐쉬(151)와 DNS 데이터 베이스(153)를 사용하여 DNS 정보를 획득하고, DNS 캐쉬(151) 및 DNS 데이터 베이스(153)에 해당 DNS 정보가 저장되어 있지 않은 경우에 한하여 DNS 서버(200)와 통신하여 DNS 정보를 획득하게 되어 DNS 정보를 보다 신속하게 획득할 수 있고 네트워크 장애나 DNS 서버 장애등의 상황에서도 해당 도메인에 접속하여 통신을 수행할 수 있다. Therefore, when the DNS query as a result of using a mobile communication terminal (100), DNS cache 151, and a DNS database 153 is provided in obtaining a DNS information, and corresponds to the DNS cache 151 and a DNS database 153 communication by DNS information is obtains the DNS information to communicate with the DNS server 200 only if that is not stored to obtain more rapidly the DNS information, and access to the domain even in the case of a network failure or the DNS server jangaedeung It can be carried out.

또한, 이동통신단말(100)에 마련된 자원을 활용하여 DNS 정보를 검색하므로 무선자원을 절약할 수 있어 무선자원을 보다 효율적으로 사용할 수 있다. In addition, the use of resources provided in the mobile communication terminal 100 searches for the DNS information, so it is possible to save radio resources can use radio resources more efficiently.

이상의 본 발명은 상기에 기술된 실시예들에 의해 한정되지 않고, 당업자들에 의해 다양한 변형 및 변경을 가져올 수 있으며, 이는 첨부된 청구항에서 정의되는 본 발명의 취지와 범위에 포함된다. Above the present invention it is not limited by the embodiments set forth above, can result in various modifications and changes by those skilled in the art, which are included in the spirit and scope of the invention as defined in the appended claims.

상기와 같은 본 발명에 따르면 이동통신단말에 마련된 DNS 캐쉬와 DNS 데이터 베이스를 사용하여 보다 신속하고 간편하게 DNS 정보를 획득할 수 있는 효과가 있다. In accordance with the present invention as described above it has an effect that can be more quickly and easily obtains the DNS information by using the provided DNS cache and DNS database to the mobile communications terminal.

또한, 네트워크 장애나 DNS 서버 장애등의 상황에도 접속하고자 하는 도메인에 대한 DNS 정보를 획득할 수 있으며, 무선 자원을 보다 효율적으로 사용할 수 있는 효과도 있다. In addition, it is possible to obtain the DNS information for the domain that you want to connect in the context of a network failure or a DNS server jangaedeung, there are effects that you can use radio resources more efficiently.

Claims (5)

  1. 네트워크를 통해 특정 도메인에 접속하고자 하는 이동통신단말의 DNS 정보 획득 방법에 있어서, In the obtained DNS information of the mobile communication terminal to access a specific domain methods via a network,
    상기 이동통신단말의 휘발성 메모리에 마련되어 복수의 도메인에 대한 DNS 정보를 저장하는 DNS 캐쉬에서 특정 도메인에 대한 특정 DNS 정보를 검색하는 단계; Further comprising: a volatile memory provided in the mobile phone searches for specific DNS information about a specific domain in the DNS cache to store the DNS information of a plurality of domains;
    상기 DNS 캐쉬로부터 상기 특정 DNS 정보가 검색되지 않으면, 상기 이동통신단말의 비휘발성 메모리에 마련되어 DNS 정보를 저장하는 DNS 데이터 베이스에서 상기 특정 DNS 정보를 검색하는 단계; If the step of from the DNS cache, the specific DNS information is not detected, retrieving the specific DNS information from the DNS database to store the DNS information provided in the non-volatile memory of the mobile communication terminal; And
    상기 DNS 데이터 베이스로부터 상기 특정 DNS 정보가 검색되지 않으면, 상기 네트워크를 통해 DNS 정보를 제공하는 DNS 서버와 통신하여 상기 특정 DNS 정보를 획득하는 단계;를 포함하는 것을 특징으로 하는 이동통신단말의 DNS 정보 획득 방법. DNS information of the mobile communication terminal comprising: a; if from the DNS database the specific DNS information is not detected, to communicate with the DNS server for providing DNS information through the network obtaining the specific DNS information how to acquire.
  2. 청구항 1에 있어서, The method according to claim 1,
    상기 DNS 데이터 베이스는 복수의 도메인 이름 및 이에 대응하는 IP 주소를 포함하는 DNS 정보를 목록화하여 룩업테이블로서 저장하는 것을 특징으로 하는 이동통신단말의 DNS 정보 획득 방법. The DNS database is a plurality of domain names and corresponding method obtained DNS information of the mobile communication terminal characterized in that the list of the DNS information including an IP addressable store a look-up table.
  3. 청구항 2에 있어서. The method according to claim 2.
    상기 룩업테이블은, 상기 DNS 서버와의 통신을 통한 상기 DNS 정보의 획득 여부에 따라 업데이트되는 것을 특징으로 하는 이동통신단말의 DNS 정보 획득 방법. The look-up table, the method obtaining DNS information of the mobile communication terminal characterized in that the update based on whether the acquisition of the DNS information through communication with the DNS server.
  4. 네트워크를 통해 기접속된 도메인에 대응하는 IP 주소를 데이터 베이스로서 저장하는 저장부; A storage unit for storing an IP address corresponding to the domain-based access over the network as a database;
    상기 네트워크를 통한 무선 통신을 수행하는 무선 통신부; A wireless communication unit that performs radio communication via the network;
    특정 도메인에 대한 접속을 위해 상기 저장부를 검색하여 상기 IP 주소를 검출하며, 상기 특정 도메인에 대응하는 IP 주소가 상기 저장부에 존재하지 않는 경우에는 상기 무선통신부를 통해 DNS 서버와 통신하여 상기 IP 주소를 획득하는 제어부;를 포함하는 이동통신단말. If it does not exist in the IP address is the storage unit corresponding to the specific domain, and detects the IP address to the search unit said storage for the connection for a particular domain, to communicate with the DNS server through the wireless communication unit the IP address a mobile communication terminal including a; a controller for obtaining.
  5. 청구항 4에 있어서, The method according to claim 4,
    상기 제어부는, 상기 DNS 서버와의 통신을 통한 상기 DNS 정보의 획득 여부에 따라 상기 저장부의 데이터 베이스를 업데이트하는 것을 특징으로 하는 이동통신단말. Wherein, the mobile communication terminal characterized in that the storage unit updates the database based on whether the acquisition of the DNS information through communication with the DNS server.
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