Abstract:
PURPOSE: A PAN(Personal Area Network) subscription method using passive scanning is provided to selectively subscribe a device providing a specific service by determining a service type included in a beacon. CONSTITUTION: A device(1000) which desires subscription starts scanning(S31). The device stores a service type. The device receives a beacon transmitted by a coordinator(S32). The device determines whether the device is able to be subscribed(S33). The device ignores the beacon when the device is unable to be subscribed(S34). When the device is able to be subscribed, the coordinator transmitting the beacon or the identification information of the PAN is updated(S35). [Reference numerals] (1000) Device; (2) Coordinator; (S31) Start scanning; (S32) Beacon (including service type); (S33) Subscription available?; (S34) Ignore; (S35) List up; (S36) End scanning; (S37) Subscribe
Abstract:
PURPOSE: A network discovery method is provided to selectively discover a network in which a device providing a service is formed. CONSTITUTION: An adjacent device A(200) and an adjacent device B(300) receives a discovery message including a service type information(S14). It is determined whether the adjacent device A and the adjacent device B provide one or more services specified by the service type information(S15a,S15b). When the one or more services specified by the service type information are provided, the adjacent device A transmits the identifier of the formed network to a host(100)(S23). [Reference numerals] (100) Host; (200) Adjacent device A; (300) Adjacent device B; (S11a,S11b) Network establishment; (S12a,S12b) Subscription allowance; (S13) Discovery message generation; (S14) Discovery message broadcasting; (S15a,S15b) Is service provided?; (S17) Network selection; (S18) Subscription message; (S19) ID application; (S23) Response message
Abstract:
PURPOSE: A dynamic library addition installer of an android platform and a method thereof are provided to dynamically add a library without replacing an android platform by using an external directory which stores a library. CONSTITUTION: An external directory generating unit(130) generates an external directory which stores a library. A library information generating unit(140) generates library information including location information of the library. A controlling unit(150) stores the library in the external directory. A determining unit(110) determines installation of the library. The external directory generating unit generates the external directory according to a determining result.
Abstract:
PURPOSE: A system for totally releasing a multicast service in usage through a personal computer in the multimedia satellite communication system is provided to totally release a multicast service in usage through one function selection. CONSTITUTION: A set-top box(4) is comprised of an RF unit(41), an MPEG-2 TS receiving unit(42), a CDMA transmitting unit(43), a processor(44) and a service information storage unit(46). The RF unit(41) executes frequency down conversion and low noise amplification for a radio frequency signal transmitted from a central station. The MPEG-2 TS receiving unit(42) demodulates and receives an MPEG-2TS packet data received from the central station. The CDMA transmitting unit(43) carries out CDMA conversion and modulation processing for the data to transmit to the central station. The processor(44) controls to transmit the received data, received through the MPEG-2 TS receiving unit(42), to a personal computer. The service information storage unit(46) stores channel ID or PID information for a multicast service.
Abstract:
PURPOSE: A multimedia service system based on the bandwidth efficiency between a personal computer and a set top box in the multimedia satellite communication system is to provide a multimedia service, such as multicast, broadcast, etc., considering the bandwidth efficiency between a personal computer and a set top box. CONSTITUTION: A set top box(4) is comprised of an RF unit(41), an MPEG-2 TS receiving unit(42), a CDMA transmitting unit(43), a processor(44), a network interface card(45), and a service information storage unit(46). The RF unit(41) carries out frequency down conversion and low noise amplification for a high frequency signal sent from a central station. The MPEG-2 TS receiving unit(42) demodulates an MPEG-2 TS packet received from the central station. The CDMA transmitting unit(43) executes CDMA conversion and modulation for data to be transmitted to the central station. The processor(44) controls so that a data received through the MPEG-2 TS receiving unit(42) can be transmitted to a personal computer(5). The network interface card(45) executes interfacing between the set top box(4) and the personal computer(5). The service information storage unit(46) stores service information stores necessary service information among service information transmitted from the central station. The personal computer(5) is composed of a subscriber program(51), a PNM(PC Network Monitor) program(52) and a bandwidth information storage unit(53).
Abstract:
PURPOSE: A mode setting device of set-top box is provided to make a user change the action mode of the set-top box easily by using a personal computer in multimedia satellite communication system. CONSTITUTION: A mode setting device of set-top box in multimedia satellite communication system includes a demultiplexer, which outputs selectively the data that have the same PID(Packet ID) with the set PID, a MPEC decoder, which outputs the MPEC-coded received data from the satellite broadcasting after decoding them, a data storage part, which stores PID information that is corresponded to multimedia services and the satellite broadcasting reception services, a set-top box, which has a processor that sets and registers the PID in the demultiplexer based on the mode selection information, a personal computer, which outputs the selection screen information for selection of the satellite broadcasting reception service and multimedia service, and transmits the service selection information that is selected by a user to the set-top box.
Abstract:
PURPOSE: A set-top box supervision system in multimedia telecommunication system using personal computer is disclosed to effectively recognize error states of set-top box. CONSTITUTION: A set-top box supervision system in multimedia telecommunication system using a personal computer is composed of a RF device(41), a MPEG-2 TS receiver(42), a CDMA sender(43), a processor(44), and an error information reservation department(46). The RF device converts and amplifies frequencies of the CDMA sender's outgoing signals. The MPEG-2 TS receiver demodulates and receives data sent from central area's MPEG-2 TS packet. The CDMA sender converts and modulates outgoing data into CDMA. The processor controls reception data received through the MPEG-2 TS receiver to the personal computer, control and output personal computer's data through the CDMA sender. The processor checks for errors in the set-top box's interior circuits and stores error information in error information reservation department. If request for error information is present, saved information is sent to the personal computer, which possesses a member program(51), a Graphic User Interface, a PC Network Monitor, and an error information memory(53). When appropriate program is executed, an event timer(511) is used, polling is conducted on the set-top box to collect error information, stores it in the error information memory, and outputs information if user request is present.
Abstract:
PURPOSE: A subscriber authentication method of multimedia satellite communication system is provided to enable authentication procedure by storing subscriber's information requesting multimedia services in district center control processor and database. CONSTITUTION: A district center decides whether a subscriber is legally registered when a call request comes from a station. The subscriber is checked whether the subscriber is on a service currently, if the subscriber is found out to be a legally registered subscriber. Current status of the subscriber is changed to a service status, if the subscriber is not on a service currently. A successful service connection message is sent to a set top box. Database access time for authentication of a subscriber requesting a service is reduced, and stored subscriber information is used for authentication. A district center provides multimedia services by hooking up with Internet and manages network, and has control function. A multimedia terminal can be a personal computer, and a set top box acts as a terminal station.
Abstract:
본 발명은 위성통신 가입자에게 화상데이터 등의 멀티미디어 데이터를 고속으로 전송할 수 있도록 된 멀티미디어 위성통신 시스템에 관한 것이다. 본 발명에 따른 멀티미디어 위성통신 시스템은 위성통신 시스템을 이용하여 인터넷이나 멀티미디어 서버와 통신가입자간의 통신링크를 제공하도록 된 멀티미디어 위성통신 시스템에 있어서, 상기 멀티미디어 위성통신 시스템은 인터넷과 물리적으로 결합되는 중심국과, 통신 단말기와 물리적으로 결합되는 셋톱박스를 구비하여 구성되고, 상기 중심국으로부터 셋톱박스로의 포워드링크는 TDM방식을 통해 이루어지고, 셋톱박스로부터 중심국으로의 리턴링크는 CDMA방식을 통해 이루어지는 것을 특징으로 한다. 그리고, 상기 중심국은 셋톱박스로 송출할 TS패킷에 대해 PID를 부가하여 송출하고, 셋톱박스는 자신에게 할당된 PID를 근거로 데이터 수신을 실행하며, 또한 상기 리턴링크는 다수의 주파수채널을 구비하고, 이들 각각의 주파수채널에 대해 다수의 CDMA 코드가 할당되는 것을 특징으로 한다. 상기한 구성에 의하면, 통신가입자가 멀티미디어 위성통신 시스템을 통해서 인터넷이나 각종 멀티미디어 서버에 접속할 수 있게 되므로 통신망운용이나 구축이 매우 용이해지게 된다. 또한, 중심국으로부터 셋톱박스로의 데이터전송을 TS패킷을 이용하는 TDM방식을 통해서 실행하고, 셋톱박스로부터 중심국으로의 데이터전송을 주파수할당과 CDMA할당의 이중변조를 통해 실행하게 되므로, 중심국으로부터 셋톱박스로의 데이터전송을 고속으로 실행하면서 다수의 통신가입자를 수용할 수 있게 된다.
Abstract:
본 발명은 공공 인터넷 주소와 사설 인터넷 주소를 혼합하여 사용할 수 있는 망을 구축 가능하도록 하는 하이브리드 게이트웨이 구조 및 그 운용방법에 관한 것으로서, 하이브리드 게이트웨이는 인터넷과 새로 구축하는 망의 중간에 위치하고, 새로 구축되는 망은 공공 인터넷 주소와 사설 인터넷 주소를 사용하여 사용자에게 할당하여 구축하고, 인터넷은 현재 운용중인 시스템들의 변경없이 사용 가능한 구조하에서 인터넷 접속 서비스 제공자에게 다양한 형태의 망 구성을 용이하게 제공할 수 있고, 다양한 형태의 사용자 요구를 모두 충족시킬 수 있는 망 구성을 가능하게 하는 하이브리드 게이트웨이를 구성함으로써, 사설 인터넷 주소만을 사용하는 네트워크나 공공 인터넷 주소만을 사용하는 네트워크의 구축도 가능하게 할 뿐만 아니라, 공공 및 사설 인터넷 주소를 모두 사용하는 혼합된 형태의 네트워크 구축이 추가적인 장비없이 가능하고, 내부망에 연결되어 있는 모든 호스트들은 공공 및 사설과 같은 인터넷 주소 종류의 제약없이 서로 연결 가능하여 다양한 형태의 인터넷 서비스를 제공할 수 있는 효과를 갖는다.