Abstract:
A packet processing device for an IP-based information-centric network is provided. The packet processing unit includes: a packet transmission and reception unit for transmitting and receiving packets; and a packet processing unit for processing transmission and reception packets having a forwarding identifier for identifying information existing within an information-centric network and corresponding to an IP address of a network node having the information, and one or more lower identifier for identifying child information of the information. The forwarding identifier is used for packet forwarding. [Reference numerals] (100) Registry inquiry cache unit; (200) Information registration unit; (300) Information cache unit; (410) Packet reception unit; (420) Packet transmission unit; (500) Packet processing unit; (600) IP routing processing unit
Abstract:
PURPOSE: A content distribution network system including an edge node and a method for caching and managing content of the edge node are provided to reduce a network load caused by excessive content traffic by selectively caching content of predetermined resolution based on features of a user terminal and a network. CONSTITUTION: An information collecting unit(100) obtains user terminal information and network information. A content caching unit(110) checks features of a network and a user terminal by analyzing the obtained information and selectively caches content of predetermined resolution according to the checking result. A content providing unit(120) provides the cached content to the user terminal according to a request. [Reference numerals] (100) Information collecting unit; (110) Content caching unit; (120) Content providing unit; (130) Content management unit; (1400) Horizontal content request unit; (1410) Vertical content request unit
Abstract:
PURPOSE: A broadcasting service control method of a terminal for supplying differentiated broadcasting contents according to a request of a user is provided to supply various broadcasting services to a user by implementing the dynamic control of the broadcasting contents. CONSTITUTION: A terminal(100) recognizes broadcasting contents. The terminal receives an available candidate network list which is available from an information server(300). The terminal inquires the offer of the broadcasting contents to each network on the candidate network list. The terminal receives a response about the offer of the broadcasting contents. The terminal selects communications network(500) for connection of one or more communications network. The terminal requests the broadcasting contents in the communications network.
Abstract:
핸드오버시 패킷 유실을 방지하는 패킷 포워딩 방법이 개시된다. 이동 노드가 현재 연결된 제1 네트워크 접속장치의 도메인에서 다른 도메인으로 이동하는 중에 발생하는 2 계층의 제1 트리거 정보를 기초로 이동 노드가 이동하려는 도메인의 제2 네트워크 접속장치를 예측하고, 제1 네트워크 접속장치가 이동 노드와의 연결 중단을 의미하는 2 계층의 제2 트리거 정보를 얻으면, 이동 노드로 향하는 패킷을 링크를 통해 예측된 제2 네트워크 접속장치로 포워딩하고, 제2 네트워크 접속장치는 이동 노드와 연결되었음을 의미하는 2 계층의 제3 트리거 정보를 얻으면 포워딩된 패킷들을 이동 노드로 전달한다. 이로써, 핸드오버시 패킷 유실 없이 패킷을 포워딩할 수 있다. 핸드오버, 이동 노드, 네트워크 접속장치, 2 계층 트리거 정보,
Abstract:
A fast handover method for a proxy mobile IP is provided to reduce a packet loss and delay when a mobile node moves between different IP subnets/links without changing and adding an IP protocol stack of the mobile node. A serving PoA(Point of Attachment)(110) transmits a binding update message to a PAR(Previously Access Router)(120). The PAR transmits a proxy handover start message for establishing an IP tunnel with an NAR(New Access Router)(140), and receives a message for informing about a result of establishing an IP tunnel from the NAR(140). The NAR(140) generates a new CoA(Care of Address) and provides the newly generated CoA to a target PoA(130). The target PoA(130) transmits the new CoA to an HA(Home Agent)(150) in order to update CoA of the HA(150). An MN(Mobile Node)(100) updates the newly generated CoA in the NAR(140) according to a general IP operation.
Abstract:
핸드오버시 패킷 유실을 방지하는 패킷 포워딩 방법이 개시된다. 이동 노드가 현재 연결된 제1 네트워크 접속장치의 도메인에서 다른 도메인으로 이동하는 중에 발생하는 2 계층의 제1 트리거 정보를 기초로 이동 노드가 이동하려는 도메인의 제2 네트워크 접속장치를 예측하고, 제1 네트워크 접속장치가 이동 노드와의 연결 중단을 의미하는 2 계층의 제2 트리거 정보를 얻으면, 이동 노드로 향하는 패킷을 링크를 통해 예측된 제2 네트워크 접속장치로 포워딩하고, 제2 네트워크 접속장치는 이동 노드와 연결되었음을 의미하는 2 계층의 제3 트리거 정보를 얻으면 포워딩된 패킷들을 이동 노드로 전달한다. 이로써, 핸드오버시 패킷 유실 없이 패킷을 포워딩할 수 있다. 핸드오버, 이동 노드, 네트워크 접속장치, 2 계층 트리거 정보,
Abstract:
A method and a system for performing a fast handover independent of a mobile node are provided to support the handover independent of the mobile node by using fast RA and OP-DAD(Optimistic Duplicate Address Detection) without composing an address in advance, thereby enabling an independent operation for the mobile node and simplifying a handover process. A PAR(Previous Access Router) transmits an HI(Handover Initiate) message indicating initiation of a handover when receiving a PRE-HO(Pre-Handover) signal of a data link layer and transmits a packet to a mobile node when receiving a HACK(Handover Acknowledge character) message indicating which the HI message has received(S300,S310,S330). AN NAR(New Access Router) transmits the HACK message to the PAR when receiving the HI message from the PAR and transmits an RA(Router Advertisement) message and the packet transmitted from the PAR to the mobile node when receiving an LU(Link Up) PRE-HO signal indicating that a link for the mobile node is formed in the data link layer(S320,S340,S350).
Abstract:
중심 네트워크에 위치하는 핸드오버 제어 장치가 방송망과 통신망간 사용자 단말 그룹의 핸드오버를 제어한다. 핸드오버 제어 장치는 방송망과 통신망 중 현재 방송 컨텐츠를 제공하고 있는 전송망에서 이상 상태가 감지되거나 전송망으로부터 방송 컨텐츠를 타 전송망이 제공하도록 하는 요구 메시지를 수신하면, 방송 컨텐츠를 제공할 타겟 전송망을 선택하고, 사용자 단말 그룹으로 선택한 타겟 전송망으로 핸드오버 요청 메시지를 멀티캐스트 또는 브로드캐스트 전송 형태로 전송한다.
Abstract:
According to an embodiment of the present invention, provided is a router comprising a number calculator for counting the cumulative number of multiple requests corresponding to multiple previously requested contents, and the request number of a request signal on random contents currently inputted; a probability calculator for calculating a random probability value on the random contents based on the cumulative number of multiple requests and the request number; and a policy determining part for determining whether to store the random contents provided to a random terminal which has transmitted the request signal from a random contents server based on the random probability value and a reference probability value determined.