Abstract:
PURPOSE: A device for collecting/transmitting billing data of an FA(Foreign Agent) system for wireless LAN interworking and a method therefor are provided to enable an FA to have a packet monitoring function and to collect billing data for a mobile station by packet information in accordance with the monitoring function, thereby efficiently collecting and transmitting the billing data. CONSTITUTION: A diameter protocol controller(220) transceives billing information on a mobile station. A billing control thread process unit(250) collects and stores the billing information on the mobile station. A billing control main process unit(240) transmits the collected/stored billing information to the diameter protocol controller(220), in order to transmit the billing information to an authentication/billing server(112). A collected billing data manager(260) accesses the billing control main process unit(240), and retrieves the stored billing information. An FA controller(210) controls storing/transmitting operations of the collected billing information of the billing control thread process unit(250) and the billing control main process unit(240).
Abstract:
PURPOSE: A call test system in an ALL-IP mobile network and a method for controlling the same are provided to test the major devices and functions of an ALL-IP(Internet Protocol) mobile network. CONSTITUTION: An ALL-IP call test system comprises a user interface part(200), a call control part(210), a registration/authentication part(220), a media input/output control part(230), a media compression part(240), a media conversion part(250), a log processing part(260), and a statistical report part(270). The user interface part(200) receives system setup information from a user, constructs an execution environment, and sets up a user interface and a system environment to receive various instructions from the user. The call control part(210) receives signal messages from other call test systems and processes calls. The registration/authentication part(220) executes the registration of mobile terminals and users through interworking with a SIP(Session Initiation Protocol) server. The media input/output control part(230) digitalizes analog media signals and executes input/output. The media compression part(240) compresses media in order to increase the efficiency of network resources. The media conversion part(250) converts and transmits media streams in order to process traffics actually. The log processing part(260) monitors and stores Tx/Rx SIP messages necessary to execute functions as a tester. The statistical report part(270) produces and reports statistical data for test results.
Abstract:
PURPOSE: A session management system for the interworking between wireless networks and a method therefor are provided to prevent the inconsistency of session information as a protocol conversion function sends a relevant radius response message to a radius client AP(Access Point) if an abort-session-request message or a re-auth-request message is received from the radius client AP. CONSTITUTION: A session management system for the interworking between wireless networks comprises an AP(120), a diameter server(130), and a DHCP(Dynamic Host configuration Protocol) server(140). The AP(120) executes a radius client function so that a mobile terminal(110) can access a wireless network. The diameter server(130) executes a protocol conversion function for protocol conversion with the AP(120), an authentication/authority verification function for the mobile terminal(110), an IP filter function, and a billing function as the AP(120) executes the radius client function only. The DHCP server(140), interworking with the diameter server(130), allocates a dynamic IP address for the mobile terminal(110).
Abstract:
PURPOSE: An apparatus and a method for providing subscriber authentication of a system interworking between wireless LAN networks are provided to reduce unnecessary traffic by processing an authentication procedure according to a movement range of a subscriber. CONSTITUTION: A mobile terminal(240) searches an accessible AP(Access Point)(230) and performs an authentication and connection procedure(S401). The mobile terminal(240) transmits an access request message to the AP(230)(S402). The AP(230) converts the access request message into a radius protocol and transmits it to an authentication server(210)(S403). The AP(230) converts a password request message and a challenge value received from the authentication server(210) into an EAP protocol and transmits it to the mobile terminal(240)(S405). The mobile terminal(240) transfers a subscriber password and the challenge value to the AP(230)(S406). The AP(240) converts the subscriber password and challenge value into a radius protocol message and transmits it to the authentication server(210)(S407). The authentication server(210) checks the subscriber password, and if authentication is successful, the authentication server(210) informs the AP(230) accordingly(S408). The AP(230) informs the mobile terminal(240) of the successful authentication(S409), and the mobile terminal(230) receives additional data from the AP(240) or uses a wireless LAN service. When the mobile terminal(240) is moved during a service(S410), it requests re-connection from the AP(240)(S411). The AP(240) checks whether the mobile terminal has been moved from the same domain managed by a router to which the AP belongs(S412). If the mobile terminal(240) has been moved from the same domain, the AP(230) informs the mobile terminal that authentication is not required(S415).
Abstract:
PURPOSE: A continuous packet sequence control method for supporting a mobility in a radio communication network is provided to reduce a data sequence change and a loss rate by applying a handoff sequence controlling when a mobile station is moved into a different PDSN(Packet Data Serving Node) area. CONSTITUTION: A mobile station reports its position information to a PDSN(501), and the PDSN stores the position information. The PDSN estimates a movement direction of the mobile center and its rate by using the position information, area information having location information of an RN(Radio Network) and movement environment information of the PDSN(502). The PDSN constructs RNs on the estimated movement path of the mobile center as a multicast group by using the estimated movement direction and rate of the mobile center(503). The PDSN records an estimated handoff time of each member RN and informs each RN accordingly(504). The PDSN transfers a packet to be transmitted to the mobile station to the member RNs of the multicast group and an RN in which the mobile station is currently positioned transfers the packet to the mobile station. The member RNs respectively store only packets after the handoff-estimated time(505). The mobile center is moved into an adjacent RN and informs the RN of the number of the last packet the mobile station itself has received.
Abstract:
PURPOSE: A method for certifying a subscriber in a radio mobile communications net and a method for generating an encoding session key are provided to supply an algorithm generating an early encoding session key for protecting the algorithm certifying a mobile subscriber and sending data. CONSTITUTION: A method for certifying a subscriber in a radio mobile communications net and a method for generating an encoding session key include a few steps. In the first step the random value(20) of 128 bits and the mobile subscriber's secret certifying key of 64 bits are prepared. In the second step the random value(20) of 128 bits is divided by 64 bits and the value is input to each 16 round F function(21,23), a component of a new mobile subscriber certifying algorithm. In the third step the output stream of 64 bits through operation of F function is generated and is prepared as a key of the second part F function(23). In the fourth step the second part F function(23) inputs the random value of 64 bits and the output stream of the 64 bits and generates the output stream of 64 bits. In the fifth step the output stream of the 64 bits of the second part F function(23) is calculated by exclusive-OR(22) of the random value of 64 bits and the bit unit and the value is divided by 32 bits(25,26) and is calculated by exclusive-OR(24) of the bit unit and 32 bits, the final key stream(28) are generated.
Abstract:
본 발명은 신호 채널 또는 무선 트래픽 채널 할당 이전에 중계 지연 처리가 이루어지도록하는 이동통신 시스템의 종단 대 종단 중계지연 서비스 처리방법에 관한 것으로서, 착신 교환기가 해당 단말을 찾기 위해 전송하는 페이징 신호에 누적 중계 지연값을 포함하여 전송하면, 해당 착신 단말은 그 페이징 신호를 받고, 최대 종단 대 종단 중계 지연값과 상기 페이징 신호에 포함된 누적 중계지연값을 비교하여 그 결과값을 페이징 신호 응답시에 발신측으로 전송하되, 만일 누적 중계지연값이 최대 종단 대 종단 중계 지연값 보다 클 경우, 상기 착신 단말은 신호 채널 및 트래픽 채널 할당을 하지 않고 발신 단말로부터 전송된 호를 거절하도록 함으로써 값비싼 무선 자원을 낭비하지 않고 효율적으로 이용할 수 있으며, 착신 사용자에 대한 인증, 암호화 시작, 임시번호 할당 절차 등 그 이후의 처리가 불필요하게 진행되는 것을 방지하도록 함으로써 이동통신망의 처리 효율을 높일 수 있다는 특징이 있다.
Abstract:
본 발명은 하부가 ATM 스위치들로 구성된 이동통신 시스템의 유선 구간에서 연결 재라우팅 방법에 관한 것으로, 종래의 재라우팅 방법의 문제점인 핸드오프 지연 시간을 줄이고 불필요한 사전 연결을 줄이기 위해 다단계 임계치를 갖는 핸드오프 알고리즘을 적용하여 다수의 부영역과 세 개의 방향으로 셀을 구성하여 사전 연결 설정이 필요한 경로와 사전 연결 해제가 필요한 경로를 식별함으로써 망 자원을 효율적으로 사용할 수 있는 다단계 임계치를 갖는 핸드오프 알고리즘을 이용한 연결 재라우팅 방법이 제시된다.
Abstract:
본 발명은 서로 다른 표준을 사용하는 이동 단말 및 기지국과 이동교환기간의 접속 방법에 관한 것이다. 종래에는 서로 다른 표준을 사용하는 이동 단말 및 기지국과 이동교환기간의 접속을 위해 기지국에서 프로토콜을 변환 기능을 제공하였으며, 이 경우에는 프로토콜간의 유사성에 근거한 프로토콜 번역 방법이 이용되었다. 그러나 프로토콜 번역 방법은 대상 프로토콜이 유사한 경우에만 제한적으로 사용될 수 있는 문제점이 있다. 그러므로 본 발명에서는 기반망 형상 정보를 포함한 시스템 정보를 이용하여 신호 방식을 결정하고 이동 단말 및 기지국과 이동교환기 간의 프로토콜이 상이한 경우 이동 단말 및 기지국의 신호 메시지 내에 이동 교환기의 신호 메시지를 정보 요소로써 포함하여 교환함으로 이동교환기의 프로토콜을 변형하지 않고도 상이한 프로토콜을 사용하는 이동 단말 및 이동 교환기를 접속할 수 있는 이동 단말 및 기지국과 이동교환기 간의 접속 방법이 제시된다.