Abstract:
본 발명은 서버 푸쉬(push)를 이용하여 내장형 시스템을 위한 운영체제를 변경하는 방법 및 장치에 관한 것이다. 본 발명에 따른 내장형 시스템의 운영체제 변경방법은, 제1 메모리 영역에 저장된 기존 운영체제를 로딩하고, 상기 기존 운영체제를 기동하는 단계와, 신뢰된 서버로부터 운영체제 변경 요구 및 새로운 운영체제 이미지를 수신하는 단계와, 상기 새로운 운영체제 이미지를 제2 메모리 영역에 저장하는 단계, 및 상기 새로운 운영체제를 로딩하고, 상기 새로운 운영체제를 기동하는 단계를 포함한다. 그리고 상기 새로운 운영체제가 정상적으로 부팅되었으면 상기 제1 메모리 영역에 상기 제2 메모리 영역의 이미지를 복사한 후 콜드 부트를 수행하여 새로운 운영체제를 운용하고, 그렇지 않으면 기존의 운영체제를 그대로 이용하게 된다. 내장형 시스템, 운영체제, OS, Boot Loader
Abstract:
본 발명은 홈게이트웨이 시스템에서 새로운 장치 및 서비스가 사용될 경우 해당 장치 드라이버 및 서비스를 설치하는 방법에 관한 것이다. 본 발명에 따른 홈게이트웨이 시스템의 자동 서비스 설치 방법은, 홈게이트웨이 시스템에서 하드웨어 장치의 변경 여부를 판단하는 단계와, 상기 장치 변경여부 판단결과 상기 홈게이트웨이 시스템에 새로운 하드웨어 장치가 추가된 경우에는 신뢰된 서버에 상기 새로운 장치에 대한 정보를 전송하는 단계와, 상기 서버로부터 상기 새로운 하드웨어 장치에 대한 드라이버 및 상기 드라이버에 대응하는 서비스에 관한 바이너리 파일을 다운로드하는 단계, 및 상기 다운로드 받은 바이너리 파일을 이용하여 상기 새로운 하드웨어 장치에 대한 드라이버 및 서비스를 개시하는 단계를 포함하는 것을 특징으로 한다. 본 발명에 따르면 홈게이트웨이 시스템에서 사용자의 개입 없이 장치 드라이버 및 서비스의 변경이 가능하며, 홈게이트웨이 시스템의 프로세서가 변경된 경우에도 원시 코드를 이용하여 용이하게 서비스를 제공할 수 있는 이점이 있다.
Abstract:
PURPOSE: A system and a method for loading an OS(Operating System) for an embedded system are provided to reduce an expense for developing a bootloader and remove troublesomeness for downloading the OS every time by making the OS perform the functions to be executed in the bootloader. CONSTITUTION: A client(200) transits the OS version information to the server before the application is started after the OS(240) is executed, and executes an application program(260) in case that the OS version information of the client is identical with the OS version information stored in a server(100). The server compares the OS version information transmitted from the client with the OS version information stored in the server, and loads an OS image stored in the server to the client when two OS version information are different. The OS includes a driving part(250) transmitting the OS version information to the server, and storing the OS image downloaded from the server and the OS version information matched with the OS image to a bootable nonvolatile memory.
Abstract:
PURPOSE: A packet transmitting method in a virtual network is provided to raise extensibility and to bind the virtual network according to a service unit. CONSTITUTION: A transmission host device (30) transmits a packet (S510). A virtual router (Ra) which is a connection router of the transmission host device receives the packet. The virtual router adds a reception IP field and a transmission IP field which set an IP address of a first virtual router (R1) to the packet and transmits the packet after checking an IP address (VR2 IP) of a second virtual router (R2) (S520). The second virtual router searches an IP address (VR5 IP) of a fifth virtual router (R5) corresponding to the connection router having a corresponding domain name in reference to a third mapping table, changes a value of a received IP field into the IP address of the fifth virtual router and transmits the packet (S530). A fourth virtual router (R4) receives the packet corresponding to the fourth virtual router and delivers the packet through a routing path which is set according to a routing table if the IP address of the reception IP field does not match with an IP address (VR4 IP) of the fourth virtual router (S540). The fifth virtual router transmits the packet corresponding to the fifth virtual router based on link local data after decapsulating the reception IP field and the transmission IP field (S550). [Reference numerals] (AA,BB) Data
Abstract:
PURPOSE: An apparatus for detecting DDoS attack is provided to lower detection error rate and to efficiently defense DDoS attack. CONSTITUTION: An apparatus for detecting DDoS attack comprises: an information collecting unit(110) for collecting DDoS detection information; and an inspection unit(120) for calculating DDoS attack probability by first probability determined by traffic change ratio information, second probability determined by variation of first type flow change, and third probability determined by second type flow PPS(packet per second).
Abstract:
PURPOSE: A DDoS attack detection and traffic reduction method using per-flow statistical information, and a system thereof are provided to quickly report DDoS traffic to a policy management server. CONSTITUTION: A router processes first statistical information to second statistical information(S303). A router confirms the change rate of the second statistical information(S304). In case the change rate exceeds a set threshold rate, the router decides a DDoS(Distributed Denial of Service) attack(S305). The router reports a DDoS attack generation event to a policy management server(S307). The router performs a rate limit function for the reduction of the traffic(S308).
Abstract:
PURPOSE: A method for allocating just resources to network users and an apparatus thereof are provided to dynamically bandwidth on the basis of a bandwidth reduction ratio dynamically determined. CONSTITUTION: A flow information collecting unit collects information about flow(S301). The flow information collecting unit groups the collected flow information(S302). A detection unit compares a ratio value between an F/B value and an F/P value with a predetermined threshold value. In case the ratio value exceeds the predetermined threshold value, a bandwidth control unit calculates a recommended bandwidth(S304,S305). The bandwidth control unit controls the bandwidth of the grouped flow(S306).
Abstract:
PURPOSE: A forwarding virtualizing method about a router is provided to improve a phenomenon that a speed of the router is reduced due to a plurality of operating systems loaded on the top of hypervisor, and to maintain a high processing speed of the router. CONSTITUTION: A forwarding about a forward resource is made. The resource is classified with a packet according to each operating system(105). The latency in the packet is set up. A packet scheduling is set according to each packet. The resource which is para-virtualized by a hypervisor(103) is supplied according to the schedule set by the operating system.