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:
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:
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
Abstract:
A system of a bridge-based cellular Ethernet network and a handover processing method thereof are provided to reduce handoff delay of an MN(Mobile Node) up to a physical connection delay level, and to prevent lost frames during handover, thus efficient and fast handover can be carried out, consequently network efficiency is improved. An HLR(Home Location Register)(24) manages configuration information of network components. Plural BSBs(Base Station Bridges)(22) consist of 2-layer switches in connection with plural wireless base stations. Plural SCBs(Site Core Bridges)(23-1,23-4) are connected with a portion of the BSBs(22), deliver frames in MAC(Medium Access Control)-in-MAC manners, and transmit frames to an SCB of a site to which a destination MN belongs by confirming the destination MN whose communication is demanded by an MN within a self site through the HLR(24).
Abstract:
PURPOSE: A method for emulating airborne data bus system over short-range broadcast and multicast networks and a system for carrying out the method are provided to improve the quality of work by supporting the rapid technical development on the conventional data bus system. CONSTITUTION: A terminal(110) implements the function as a separate apparatus. An analyzer(120) analyzes the frame by collecting frame on the data bus. A traffic generator(130) generates frame having load and error for the communication net. A remote setter(140) implements the remote controlling function for all the apparatuses on the bus.
Abstract:
PURPOSE: A short-range broadcasting communication system, a method for profile exchanging among short-range broadcasting communication nodes utilizing the communication system, and a short-range broadcasting communication node for carrying out the method are provided to build a shot-range broadcasting communication system with a situation recognition function. CONSTITUTION: A broadcast terminal device(110) stores and processes profile information. The broadcast terminal device processes a wireless and wired short-range communication. A profile preparation computer(120) writes the profile information about the broadcast terminal device. The profile preparation computer stores the profile information as described above within the corresponding broadcast terminal device. A web based internet server(130) supports the community generation and profile information preparation.