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公开(公告)号：KR100277826B1
公开(公告)日：2001-01-15
申请号：KR1019980049186
申请日：1998-11-17
IPC: H04L12/28
Abstract: 본 발명은 위성 인터넷망에서 위성 채널을 이용하여 단방향 또는 양방향의 멀티캐스트 서비스를 단말국으로 제공하는 위성 채널을 이용한 멀티캐스트 서비스 운용시스템 및 운용방법에 관한 것이다.
본 발명에 따른 멀티캐스트 서비스 운용시스템은; 중심국은, 서비스를 제공하기 위해, 해당 서비스 내용을 멀티캐스트 IP 주소(Internet Protocol Address)를 이용하여 IP 데이터그램(datagram)으로 변환하는 멀티캐스트 서비스 제공 서버와, 멀티캐스트 IP 주소를 위해 할당된 프로그램 식별자(PID: Program Identifier)/테이블 식별자(TID: Table Identifier)를 이용하여, 상기 IP 데이터그램을 수신하여 트랜스포트 스트림 패킷(Transport Stream Packet)으로 재구성하는 전송부를 포함하고; 단말국은, 가입자가 특정 멀티캐스트 서비스를 제공받고자 하는 경우 해당 멀티캐스트 서비스에 대한 정보를 생성하는 가입자의 개인용 컴퓨터(PC)와, 상기 개인용 컴퓨터가 제공하는 정보를 이용하여 멀티캐스트 서비스를 수신하기 위한 PID/TID를 설정하고, 상기 설정된 PID/TID에 따라 상기 중심국의 전송부로부터 수신되는 트랜스포트 스트림 패킷을 IP 데이터그램을 재구성하는 셋톱박스를 포함한 것을 특징으로 한다.-
公开(公告)号：KR100256692B1
公开(公告)日：2000-05-15
申请号：KR1019970082626
申请日：1997-12-31
Applicant: 한국전자통신연구원
Abstract: PURPOSE: A network synchronizing apparatus for a multimedia satellite communication system is provided to easily conform data transmission time between each set-top box by transmitting PCR data when a center station transmits a predetermined number of TS packets and synchronizing a data transmission timing signal by every set-top box through the same method when the set-top box receives the PCR data. CONSTITUTION: An ethernet interface(11) generates an IP packet on the basis of an ethernet frame inputted from an IP switch and outputs it. An input buffer(12) sequentially stores the IP packet data outputted through the ethernet interface(11). An IP packet controller(13) determines the type of the input data on the basis of a header of the IP packet data stored in the input buffer(12), controls a packet generation of a PS packet generator(15) and a TS packet generator(16) on the basis of the determining result, and controls a transmission data processing unit on the basis of a control data applied from the ethernet interface(11). A subscriber information storing unit(14) stores a PID allocated for each set-top box(4). The PS packet generator(15) generates a PS(Private Section) packet on the basis of the data inputted from the IP packet controller(13). The TS packet generator(16) generates an MPEG-2 TS packet on the basis of the PS packet data inputted from the PS packet generator(15), a PID applied from the IP packet controller(16) and traffic data stored in the input buffer(12) and outputs it. The TS packet generator(16) counts the number of the TS packets transmitted for the set-top box(4), reads a program clock reference(PCR) value applied from a PCR generator(18) when the count value is a predetermined value, and transmits it to the set-top box(4). A frequency generator(17) generates a 27MHz frequency signal. The PCR generator(18) counts the frequency signal outputted from the frequency generator(17) and outputs the count value data.
Abstract translation: 目的：提供一种用于多媒体卫星通信系统的网络同步装置，用于通过在中心站发送预定数量的TS分组并通过每个机顶盒的数据传输定时信号同步时，通过发送PCR数据来容易地符合每个机顶盒之间的数据传输时间 当机顶盒接收到PCR数据时，通过相同的方法机顶盒。 构成：以太网接口（11）根据从IP交换机输入的以太网帧生成IP包，并输出。 输入缓冲器（12）依次存储通过以太网接口（11）输出的IP分组数据。 IP分组控制器（13）基于存储在输入缓冲器（12）中的IP分组数据的报头来确定输入数据的类型，控制PS分组生成器（15）的分组生成和TS分组 基于确定结果生成器（16），并且基于从以太网接口（11）应用的控制数据来控制传输数据处理单元。 用户信息存储单元（14）存储为每个机顶盒（4）分配的PID。 PS分组生成器（15）基于从IP分组控制器（13）输入的数据生成PS（专用分组）分组。 TS分组生成器（16）基于从PS分组生成器（15）输入的PS分组数据，从IP分组控制器（16）应用的PID和存储在输入中的业务数据，生成MPEG-2TS分组 缓冲器（12）并输出。 TS分组生成器（16）对于机顶盒（4）发送的TS分组的数量进行计数，当计数值为预定值时，读取从PCR产生器（18）应用的程序时钟参考（PCR）值 ，并将其发送到机顶盒（4）。 频率发生器（17）产生27MHz的频率信号。 PCR产生器（18）对从频率发生器（17）输出的频率信号进行计数，并输出计数值数据。
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公开(公告)号：KR100243693B1
公开(公告)日：2000-02-01
申请号：KR1019970021657
申请日：1997-05-29
Applicant: 한국전자통신연구원
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
위성을 이용한 인터넷 접속 서비스 처리방법.
2. 발명이 해결하려고 하는 기술적 과제
위성을 이용해 인터넷의 대량 멀티미디어 데이타를 빠른 속도로 전송하고자 함.
3. 발명의 해결방법의 요지
인터넷 망과의 접속을 위해 이용자 단말기로부터 서비스 게이트웨이 시스템으로의 데이타 전송은 종래의 공중 전화망을 이용하고, 서비스 게이트웨이 시스템으로부터 이용자 단말기로의 인터넷 멀티미디어 데이타는 위성의 고속링크를 통해 전송한다.
4. 발명의 중요한 용도
위성 멀티미디어 시스템에 이용됨.-
公开(公告)号：KR100126217B1
公开(公告)日：1997-12-22
申请号：KR1019940033801
申请日：1994-12-12
IPC: G06F17/30
Abstract: The database initializing method is comprised of (a) an operator inputting the source data necessary for the initializing database in a memory part through a terminal and instructing to drive a data input apparatus(301,302); (b) the data input apparatus reading the data file stored in the memory part to inspect the data validity according to instructions of the operator(303,304); (c) converting the source data structure into the database structure upon an error not being detected, then inputting it to the database while outputting cause of the error and the error data upon the error being detected(305,306).
Abstract translation: 数据库初始化方法包括：（a）操作者通过终端输入在存储器部分中初始化数据库所需的源数据，并指示驱动数据输入装置（301,302）; （b）数据输入装置读取存储在存储器部分中的数据文件，以根据操作者的指令检查数据有效性（303,304）; （c）在未检测到错误的情况下将源数据结构转换为数据库结构，然后在检测到错误的同时输出错误原因和错误数据，将其输入到数据库（305,306）。
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公开(公告)号：KR1020000047270A
公开(公告)日：2000-07-25
申请号：KR1019980064063
申请日：1998-12-31
IPC: H04B7/24
CPC classification number: H04W72/1226 , H04B7/18539 , H04W72/0406 , H04W84/06
Abstract: PURPOSE: A method for reassigning abnormal access channel in the multimedia satellite communication system, in case that an abnormal channel is generated, is provided to normally operate a system by transferring the abnormal channel through other channel automatically. CONSTITUTION: An ethernet frame comprising a CDMA code and a channel frequency data is transmitted to a received data processing unit and a CDMA receiving unit(ST1). A central station control processor receives channel status information from the CDMA receiving unit(ST2) and stores it in a channel status information storage unit(ST3). Then, the central station control processor compares the channel status information from the CDMA receiving unit and the channel status information previously stored in a data base(ST4). If the received channel status information is the information of a modified channel(ST5), the central station control processor determines whether the modified channel is an abnormal access channel(ST6). If the modified channel is other abnormal channel, the central station control processor sends channel status information to a network management system(ST8).
Abstract translation: 目的：提供一种在多媒体卫星通信系统中重新分配异常接入信道的方法，在产生异常信道的情况下，通过自动通过其他信道传输异常信道来正常操作系统。 构成：将包括CDMA码和频道数据的以太网帧发送到接收数据处理单元和CDMA接收单元（ST1）。 中央站控制处理器从CDMA接收单元（ST2）接收信道状态信息并将其存储在信道状态信息存储单元（ST3）中。 然后，中央站控制处理器将来自CDMA接收单元的信道状态信息与先前存储在数据库中的信道状态信息进行比较（ST4）。 如果接收到的信道状态信息是修改信道的信息（ST5），则中央站控制处理器确定修改的信道是否是异常接入信道（ST6）。 如果修改的信道是其他异常信道，则中心站控制处理器向网络管理系统发送信道状态信息（ST8）。
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Patent Agency Ranking
公开(公告)号：KR1020000047260A
公开(公告)日：2000-07-25
申请号：KR1019980064053
申请日：1998-12-31
IPC: H04B7/15
CPC classification number: G06F15/177 , G06F15/17 , H04B7/18526
Abstract: PURPOSE: A method for initializing an operation mode of a set-top box and a personal computer in a multimedia satellite communication system is provided easily conform an operation mode of the set-top to an operation mode of the personal computer. and easily serve IMSS(Interactive Multimedia Satellite System) service to a subscriber. CONSTITUTION: A user activates a subscriber program by using a personal computer. The subscriber program requests for operation mode information to a set-top box(ST1). If the set-top box is set as DBS(Direct Broadcast Satellite) mode, a mode change to IMSS mode is inquired to the user. If the user selects mode change, the set-top box is set as IMSS mode. An operation mode of the personal computer is set to correspond to the operation mode of the set-top box.
Abstract translation: 目的：提供一种用于初始化多媒体卫星通信系统中的机顶盒和个人计算机的操作模式的方法，其容易地将机顶盒的操作模式与个人计算机的操作模式相一致。 并轻松向用户提供IMSS（交互式多媒体卫星系统）服务。 构成：用户通过使用个人计算机激活用户程序。 订户程序向机顶盒请求操作模式信息（ST1）。 如果机顶盒设置为DBS（直接广播卫星）模式，则向用户询问向IMSS模式的更改模式。 如果用户选择模式更改，则机顶盒设置为IMSS模式。 将个人计算机的操作模式设置为对应于机顶盒的操作模式。
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公开(公告)号：KR1020000047255A
公开(公告)日：2000-07-25
申请号：KR1019980064048
申请日：1998-12-31
CPC classification number: H04B7/18519 , H04B7/216
Abstract: PURPOSE: A method for processing an abnormal channel block in the multimedia satellite communication system is provided to increase the reliability of a service by rapidly checking and processing an abnormal channel. CONSTITUTION: A central station control processor receives channel status information from a plurality of CDMA receiving parts(ST12) and stores it in a channel status information storage part(ST13). The central station control processor compares the previous channel status information stored in a database and the channel status information transmitted from a CDMA receiving unit(ST14) and determines whether the channel status information transmitted from the CDMA receiving unit is a modified channel information(ST15). If the channel status information transmitted from the CDMA receiving unit is a modified channel information, the central station control processor transmits abnormal channel status information to a network management system(ST16) and discriminates whether a block appointment request is received from the network management system(ST17).
Abstract translation: 目的：提供一种处理多媒体卫星通信系统异常通道块的方法，通过快速检查和处理异常通道来提高服务的可靠性。 构成：中央站控制处理器从多个CDMA接收部分接收信道状态信息（ST12），并将其存储在信道状态信息存储部分（ST13）中。 中央站控制处理器将存储在数据库中的先前信道状态信息和从CDMA接收单元发送的信道状态信息（ST14）进行比较，并确定从CDMA接收单元发送的信道状态信息是否是修改的信道信息（ST15） 。 如果从CDMA接收单元发送的信道状态信息是修改的信道信息，则中心站控制处理器向网络管理系统发送异常信道状态信息（ST16），并判断是否从网络管理系统接收到块约定请求（ ST17）。
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公开(公告)号：KR1020000047251A
公开(公告)日：2000-07-25
申请号：KR1019980064044
申请日：1998-12-31
IPC: H04B1/06
Abstract: PURPOSE: A mode setting device of set top box using remocon in satellite communication system is provided to easily change the operation mode of a set top box by an user. CONSTITUTION: A mode setting device of set top box using remocon in satellite communication system comprises a PC(5) and a set top box(4) having a demultiplexer(44), a MPEG decoder(53), a data memory(51), a remocon signal receiver(54) and a processor(52). The demultiplexer(44) selectively outputs receive data having same PID as a preset PID. The MPEG decoder(53) decodes and outputs MPEG data output from the demultiplexer(44). The PID data corresponding a multimedia service and a satellite broadcasting receive service are stored in the data memory(51). The processor(52) outputs the multimedia service data output from the demultiplexer(44) to the PC and controls mode change on the basis of mode selection signals input from the receiver(54).
Abstract translation: 目的：提供卫星通信系统中使用遥控器的机顶盒的模式设置装置，以便用户轻松更改机顶盒的操作模式。 构成：在卫星通信系统中使用遥控器的机顶盒的模式设定装置包括具有解复用器（44）的PC（5）和机顶盒（4），MPEG解码器（53），数据存储器（51） 遥控信号接收器（54）和处理器（52）。 解复用器（44）选择性地输出具有与预设PID相同的PID的接收数据。 MPEG解码器（53）解码并输出从解复用器（44）输出的MPEG数据。 对应于多媒体业务和卫星广播接收业务的PID数据被存储在数据存储器（51）中。 处理器（52）将从解复用器（44）输出的多媒体服务数据输出到PC，并且基于从接收器（54）输入的模式选择信号控制模式改变。
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公开(公告)号：KR1020000047240A
公开(公告)日：2000-07-25
申请号：KR1019980064033
申请日：1998-12-31
IPC: H04B7/14
Abstract: PURPOSE: A call release and reconnection method in the multimedia satellite communication system is provided to increase the success rate of call connection setup in the event of a call reconnection setup request from a set top box for data communication with a central station. CONSTITUTION: A call connection request data is received from a set top box(ST1), a central station processor, based on an error estimation value extrinsically received with the call connection request data, calculates an error compensation value and stores it in a first error information storage unit(ST2). The central station processor assigns communication resources to the set top box and carries out ordinary data communication with the set top box(ST3). In process of data communication, if a call release request data is received from the set top box(ST4), the central station processor sends a response message for the call release request data to the set top box(ST5). In case that a resource release request data is received from the set top box(ST6), the central station processor sends the error information stored in the first error information storage unit to the set top box in addition to a response message for the resource release request data(ST7).
Abstract translation: 目的：提供多媒体卫星通信系统中的呼叫释放和重新连接方法，以便在来自机顶盒的呼叫重新连接建立请求的情况下提高呼叫连接建立的成功率，以便与中心站进行数据通信。 构成：从机顶盒（ST1）接收呼叫连接请求数据，中央站处理器基于使用呼叫连接请求数据外力接收的错误估计值，计算误差补偿值并将其存储在第一错误中 信息存储单元（ST2）。 中央站处理器将通信资源分配给机顶盒并与机顶盒进行普通的数据通信（ST3）。 在数据通信的过程中，如果从机顶盒接收到呼叫释放请求数据（ST4），则中央站处理器向机顶盒发送用于呼叫释放请求数据的响应消息（ST5）。 在从机顶盒（ST6）接收到资源释放请求数据的情况下，除了用于资源释放的响应消息之外，中央站处理器将存储在第一错误信息存储单元中的错误信息发送到机顶盒 请求数据（ST7）。
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公开(公告)号：KR1020000010210A
公开(公告)日：2000-02-15
申请号：KR1019980030984
申请日：1998-07-31
IPC: H04L12/16
CPC classification number: H04L61/2015 , H04L65/10
Abstract: PURPOSE: IP address management device for a multimedia satellite communication system quickly allocates a present available IP address if there is an allocation request by the IP address from a subscriber. CONSTITUTION: In a multimedia satellite communication system having a center station for managing IP address information as a database, a database of the center station manages IP address given from IP address provider and the information related to the IP address. A center station control processor(23) performs a connection control processing of a subscriber. IP switch(10) switches a data transmitting/receiving between the database and the center station control processor. The center station control processor accesses the database through IP switch(10), receives the information related to IP address, constructs IP address information storage part(240). If there is IP address allocation request of a subscriber, the center station control processor(23) searches the information storage part, and controls an allocation of the IP address. Thereby, IP address management device quickly allocates a present available IP address if there is an allocation request by the IP address from a subscriber.
Abstract translation: 目的：如果存在来自用户的IP地址的分配请求，则多媒体卫星通信系统的IP地址管理设备可以快速分配当前可用的IP地址。 构成：在具有作为数据库管理IP地址信息的中心站的多媒体卫星通信系统中，中心站的数据库管理从IP地址提供者给出的IP地址和与IP地址有关的信息。 中心站控制处理器（23）执行用户的连接控制处理。 IP交换机（10）切换数据库与中心站控制处理器之间的数据发送/接收。 中心站控制处理器通过IP交换机（10）访问数据库，接收与IP地址相关的信息，构建IP地址信息存储部分（240）。 如果存在用户的IP地址分配请求，则中心站控制处理器（23）搜索信息存储部分，并且控制IP地址的分配。 因此，如果存在来自订户的IP地址的分配请求，则IP地址管理设备快速分配当前可用的IP地址。
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