Abstract:
본 발명은 단거리 멀티캐스트 및 방송형 항공 데이터 버스 에뮬레이션 방법 및 그 실시를 위한 시스템에 관한 것으로서, 16 비트 길이의 워드와 3 비트 길이의 물리 계층용 SYNC 비트 열을 사용하는 기존의 데이터 버스 워드, 또는 이큅먼트 ID가 명시적으로 부착되지 않는 기존 데이터 버스 워드를 바이트 단위의 다양한 페이로드에 수납하여 멀티캐스트 및 방송형으로 전송하는 방법 및 시스템, 즉 항공기 내 기존 데이터 버스 시스템과의 원활한 상호 연동이 이루어지는 바람직한 형태의 고속 단거리 멀티캐스트 및 방송형 에뮬레이션 체계를 구축함으로써, 기존 데이터 버스 시스템에 관한 신속한 기술 개발 지원 및 교육 장비의 저렴한 보급 등을 포함한 다양한 관련 업무의 질적 수준 향상 효과를 얻을 수 있다. 또한, 항공기 내 기존 데이터 버스 시스템과 상기 새로운 전송 방식 간에 있을 수 있는 각종 연동 시스템을 개발함에 있어서도 본 발명에 따른 에뮬레이션 체계를 활용할 수 있다. 단거리 방송 및 멀티캐스트 통신, 항공 데이터 버스, 에뮬레이터, 이더넷
Abstract:
PURPOSE: A method for integrated audio and data transmission with combined repeater and bridge capabilities and a transmission system for carrying out the method are provided to not to interrupt audio frame transmission by data frame transmission. CONSTITUTION: A head terminator(140) is connected to a cycle master audio device(110). A loop back terminator(150) is connected to a termination audio device(130). The cycle master audio device, and a general audio device(120) and the termination audio device comprise two Ethernet physical layer units(115), an audio connection part(111), a 3 port Ethernet bridging unit(112), an audio frame generation unit(114) and a matching unit(113).
Abstract:
A bridge-based RAS(Radio Access Station) backbone network system and a method for processing signals therein are provided to prevent a loss of on-the-fly frames in a soft handover by constructing a RAS backbone network using a 2-layer Ethernet bridge. If the first MN(Mobile Node)(MN1) in the first site completes handover as the first MN moves to the third site and forms a link with a BSB(Base Station Bridge)(22) in the third site, the first MN generates a handover complete signal. The handover complete signal is transmitted to the fourth SCB(Site Core Bridge)(23-4) through the third SCB(23-3). In this case, the fourth SCB(23-4), which is a crossover bridge, receives the handover complete signal, buffering frames 0 through 2. Then the fourth SCB(23-4) retransmits the frames to the third SCB(23-3). At this moment, even though frame #2, which is an on-the-fly MAC frame, is missing, the second MN(MN2) can receive frame #2 as frames 0 through 2, which are retransmitted, are received.
Abstract:
A bridge-based radio access station backbone network system and a signal processing method thereof are provided to simplify network management, to make it possible to perform efficient and rapid handover and to enhance network efficiency. A bridge-based radio access station backbone network system comprises plural BSBs(Base Station Bridges)(22), plural SCBs(Site Core Bridges)(23-1-23-4) and an HLR(Home Location Register)(24). The BSBs(22) composed of two layered switches are connected to plural radio base stations. The plural SCBs(23-1-23-4) also composed of two layered switches are connected to a part of the plural BSBs(22), transmits frames between each other by an MAC(Media Access Control)-in-MAC scheme and forms a core network among bridges forming a network. The HLR(24) stores an IP address and an MAC address of a terminal within a network, and an address of an SCB to which a corresponding terminal is affiliated. Each of the SCBs(23-1-24-1) fixedly gets an MAC address of an external default router for relaying egress frames, fixedly preregisters an individual MAC address of its own at other SCB existing at the core network, and transmits frames to an address of an SCB to which a corresponding terminal is affiliated or an address of the external default router by checking a destination terminal with which a terminal within its site requests to communicate via the HLR(24).
Abstract:
A method for processing handover in a bridge-based RAS(Radio Access Station) backbone network is provided to easily and simply manage a RAS backbone network using a 2-layer ethernet bridge, to efficiently and speedily process handover, and to improve the efficiency of the RAS backbone network. Receiving a disconnection report message, based on handover, from an MN(Mobile Node), an existing SCB(Site Core Bridge) directs SCBs, located at the end of an existing MAC-in-MAC tunnel, to delete tunnel information and associated MN information(0,1). Afterwards, the existing SCB informs an HLR that the MN has initiated handover, and the HLR changes the operation state of the MN from "active" to "handover"(2). The MN moves to a new BSB(Base Station Bridge)(3). Meanwhile, the fourth SCB discards a frame received on the move of the MN as information about the MN has been already deleted(4). In this case, the fourth SCB discards the frame while querying the HLR about the location information of the MN(5). If the movement to the new BSB is completed, the MN executes registration procedures. At this moment, the MN transmits a route update message, including its own MAC address and IP address, to the new BSB so that it can be forwarded to a new SCB.
Abstract:
본 발명은 다수의 무선 기지국과 연결되며 2계층 스위치로 구성되는 브리지인 다수의 BSB(BaseStation Bridge)와, 망을 구성하는 브리지 중에서 코어(core) 망을 구성하는 2계층 스위치로 구성되는 브리지인 다수의 SCB(Site Core Bridge)를 포함하는 브리지 기반 무선 기지국 기간망에서의 신호 처리 방법에 있어서, 각 SCB는 크로스오버 브리지로 동작시에 미리 설정된 개수의 최근 송신 완료한 프레임을 보관하는 과정과, 핸드오버완료 신호가 수신될 경우에, 상기 보관한 송신완료한 프레임 중 선택된 프레임을 재전송하는 과정을 수행한다. 이더넷, 브리지, 핸드오버, 프레임 손실