Abstract:
PURPOSE: A method and a system for supporting simple IP(Internet Protocol) and mobile IP services in an IMT-2000(International Mobile Telecommunication in the year 2000) are provided to discriminate the simple IP service and the mobile IP service in a PDSN(Packet Data Service Node) in a mobile communication system, without modifying the specification or protocol of a mobile node. CONSTITUTION: If access network setup is performed through a wireless access network(103), PPP(Point-to-Point Protocol) link setup is performed among mobile nodes(101,102) and a PDSN(202) and an AAA(Authentication Authorization and Accounting)(206) to allocate a new address to the PPP. Based on the allocated address, the PDSN(202) performs PPP IPCP(IP Control Protocol) agreement. If an IP traffic is opened, whether the PDSN(202) corresponds to a mobile IP or a simple IP is discriminated. If the PDSN(202) corresponds to the mobile IP, the mobile IP is registered in a home agent(207) and a new IP address is allocated, then PPP IPCP re-agreement is performed with the mobile nodes(101,102) using the new IP address. If the PDSN(202) corresponds to the simple IP, the PDSN(202) performs simple IP processing.
Abstract:
PURPOSE: A method and a system for supporting simple IP(Internet Protocol) and mobile IP services in an IMT-2000(International Mobile Telecommunication in the year 2000) are provided to discriminate the simple IP service and the mobile IP service in a PDSN(Packet Data Service Node) in a mobile communication system, without modifying the specification or protocol of a mobile node. CONSTITUTION: If access network setup is performed through a wireless access network(103), PPP(Point-to-Point Protocol) link setup is performed among mobile nodes(101,102) and a PDSN(202) and an AAA(Authentication Authorization and Accounting)(206) to allocate a new address to the PPP. Based on the allocated address, the PDSN(202) performs PPP IPCP(IP Control Protocol) agreement. If an IP traffic is opened, whether the PDSN(202) corresponds to a mobile IP or a simple IP is discriminated. If the PDSN(202) corresponds to the mobile IP, the mobile IP is registered in a home agent(207) and a new IP address is allocated, then PPP IPCP re-agreement is performed with the mobile nodes(101,102) using the new IP address. If the PDSN(202) corresponds to the simple IP, the PDSN(202) performs simple IP processing.
Abstract:
PURPOSE: A method for controlling a fax incoming call of a radio data communication interworking apparatus in a digital mobile communication network is provided to perform a fax transmission service without a fax command or a loss of data by using a transmission hierarchy protocol and a variable fax server mode. CONSTITUTION: A radio data communication interworking device receives fax commands from a mobile terminal(413). The radio data communication interworking device determines whether a fax class is 2 or not(414). The radio data communication interworking device switches a current state to a fax mode and a fax state to a state of A if the fax class is 2(415). The radio data communication interworking device checks a modem response command if the fax class is not 2(416). The radio data communication interworking device switches the fax state to a state of B and transmits the fax commands to the modem if the radio data communication interworking device receives the modem response command(418). The radio data communication interworking device checks whether the fax state is a state of C, or not(423). The radio data communication interworking device receives data from the modem(419). The radio data communication interworking device checks whether the fax state is the state of B and the received data are message carrier signals(420). The radio data communication interworking device switches the fax state to the state of C if the radio data communication interworking device receives the message carrier signals(421). The radio data communication interworking device transmits the received data to the mobile terminal(422). An operating process of a fax server mode is performed if the fax state is the state of C(423).
Abstract:
PURPOSE: A method for controlling a fax outgoing call of a radio data communication interworking apparatus in a digital mobile communication network is provided to perform a fax transmission service without a fax command or a loss of data by using a transmission hierarchy protocol. CONSTITUTION: Data are received from a mobile terminal(426). The received data is compared with a page stop command(427). A TCP response method is inactivated if the received data is the page stop command(429). The received data is compared with a page end command(439). A fax state is switched to a state of D if the received data is the page end command or the fax state is switched to a state of B if the received data is not the page end command(433). The received data are transmitted to a modem if the received data is not the page stop command and the fax state is compared with a state of C(440). The data are received from the modem(434) and the received data are compared with XOFF(435). A size of TCP window is determined as O if the received data are XOFF(436). The received data are compared with XON if the received data are not XOFF(437). The size of TCP window is recovered if the received data are XON(438). The received data are transmitted to the mobile terminal if the received data are not XOFF and the received data are not XON(439). The data are received if the fax state is the state of C(426). A fax command is received from the mobile terminal if the fax state is the state of B(441).
Abstract:
본 발명은 이동 교환기에서의 데이터 서비스 방법에 관한 것으로, 데이터 서비스는 이동 가입자가 이동국 단말에 연결한 개인용 컴퓨터나 팩시밀리를 이용하여 다른 가입자와 단대단 비동기 데이터 통신을 하거나 팩스를 송수신하는 서비스 방법에 관한 것이다. 본 발명에서는 기존의 음성 이동 통신 망에서 저렴한 개발 비용과 최소의 노력으로 이동 가입자들에게 데이터 서비스를 제공하기 위해 무선 데이터 서비스 연동 장치(IWF; Inter Working Function)를 이동 교환기의 부속 장치로 구성하였고 이동 교환기가 IWF를 제어하게 함으로써 IWF를 독립적인 망 장치로 구성하였을 때 이동 교환기와 IWF 사이의 통화로가 길어지고 많은 프로토콜이 필요하게 되어 망 자원의 낭비가 심해지는 문제점을 방지하게 하였다. 그리고 발, 착신 가입자 또는 발신 가입자의 서비스 옵션을 조사하여 데이터 서비스 요구로 판단되면 기존의 음성 호 제어 처리를 종료하고 데이터 서비스 호제어 처리와 IWF 정합 처리를 구동함으로써 새로운 데이터 서비스 추가에 따라 기존의 음성 호에 별 영향을 주지 않고 독립적으로 데이터 서비스를 제공할 수 있는 이동 교환기에서의 데이터 서비스 제어 방법이 제시된다.
Abstract:
이동통신시스템에서디바이스간직접통신을위한근접도측정방법및 장치가개시된다. 근접도측정방법은게이트웨이로부터수신한패킷에셀 식별자가포함되는지를판단하는단계, 포함되는경우상기셀 식별자가기 저장된셀 식별자와매칭되는지를확인하는단계, 매칭되는경우상기패킷에서상기패킷을송수신하는이동단말들의 IP 주소를추출하는단계, 직접통신중인이동단말들의 IP 주소를포함하는근접리스트를기초로상기추출한 IP 주소와매칭되는 IP 주소를검색하는단계및 상기추출한 IP 주소가상기근접리스트에존재하지않는경우상기추출한 IP 주소를상기근접리스트에등록하고상기이동단말들의근접도를측정하는단계를포함할수 있다.