[특허]Method and system for intelligently forwarding multicast packets

Method and system for intelligently forwarding multicast packets 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-012/18
출원번호	US-0765765 (2010-04-22)
등록번호	US-9112715 (2015-08-18)
발명자 / 주소	Jain, Nitin Chen, Lee Ferguson, Earl Zhu, Min
출원인 / 주소	Foundry Networks, LLC
대리인 / 주소	Fountainhead Law Group P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 103

초록 ▼

A routing system utilizes a layer 2 switch interconnecting several routers to intelligently forward multicast packets throughout an interne exchange carrying multicast content. The layer 2 switch performs protocol snooping to extract a lookup key that is based on network layer protocol information. The lookup key is uniquely formulated to support either shared or explicit source distribution trees. The lookup key is used to query a forwarding memory that returns an outgoing port index. The outgoing port index points to one or more outgoing ports that are eligible to receive the multicast packet. The outgoing ports are also connected to the neighboring device(s) that are designated to receive the multicast packet. The routing system also supports real time maintenance and updating of the forwarding memory based on the periodic exchange of control messages. The routing system is configured to support PIM routers operating in PIM SM or PIM SSM modes. However, the routing system can also support other multicast protocols and/or standards.

대표청구항 ▼

1. A method comprising: receiving, by a Layer 2 switch, a router-to-router Layer 3 multicast control message, the router-to-router Layer 3 multicast control message being either: a Protocol Independent Multicast (PIM) hello message transmitted by a router to announce the router's presence to other neighboring routers; ora PIM join or PIM prune message transmitted by a router to identify multicast group memberships to other neighboring routers; andprocessing, by a processor of the Layer 2 switch, the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets. 2. The method of claim 1 wherein the forwarding information comprises: a discovery list storing instances of the PIM hello message received by the Layer 2 switch;a forwarding table storing outgoing port indexes corresponding to physical addresses derived from multicast group addresses; andan outgoing port lookup table storing outgoing ports for outgoing port indexes. 3. The method of claim 2 wherein the forwarding information further comprises: a source-group table storing a listing of multicast groups serviced by the Layer 2 switch; anda session table storing a plurality of session entries, each session entry identifying a multicast group, a source address, a destination address, a protocol type, an incoming port, and a corresponding outgoing port index. 4. The method of claim 1 wherein processing the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets comprises: determining whether the router-to-router Layer 3 multicast control message is the PIM hello message or the PIM join or PIM prune message; andif the router-to-router Layer 3 multicast control message is the PIM hello message, creating a neighbor list that identifies: an IP address of a router that sent the PIM hello message; andan incoming port of the Layer 2 switch on which the PIM hello message was received. 5. The method of claim 4 wherein processing the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets further comprises: if the router-to-router Layer 3 multicast control message is the PIM join or PIM prune message: determining a multicast mode of operation specified by the PIM join or PIM prune message;creating a first set of forwarding information tables in a forwarding content addressable memory (CAM) of the Layer 2 switch if the multicast mode of operation corresponds to an explicit source distribution tree; andcreating a second set of forwarding information tables in the forwarding CAM if the multicast mode of operation corresponds to a shared source distribution tree. 6. The method of claim 1 wherein the processing of the router-to-router Layer 3 multicast control message and the creating the forwarding information is performed by the processor of the Layer 2 switch prior to transmitting the router-to-router Layer 3 multicast control message to its designated destination router. 7. A Layer 2 switch comprising: a memory;a plurality of ports;one or more processors; anda non-transitory computer-readable storage medium having stored thereon software that, when executed by the one or more processors, causes the one or more processors to: receive a router-to-router Layer 3 multicast control message, the router-to-router Layer 3 multicast control message being either: a Protocol Independent Multicast (PIM) hello message transmitted by a router to announce the router's presence to other neighboring routers; ora PIM join or PIM prune message transmitted by a router to identify multicast group memberships to other neighboring routers; andprocess the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets. 8. The Layer 2 switch of claim 7 wherein the forwarding information comprises: a discovery list storing instances of the PIM hello message received by the Layer 2 switch;a forwarding table storing outgoing port indexes corresponding to physical addresses derived from multicast group addresses; andan outgoing port lookup table storing outgoing ports for outgoing port indexes. 9. The Layer 2 switch of claim 8 wherein the forwarding information further comprises: a source-group table storing a listing of multicast groups serviced by the Layer 2 switch; anda session table storing a plurality of session entries, each session entry identifying a multicast group, a source address, a destination address, a protocol type, an incoming port, and a corresponding outgoing port index. 10. The Layer 2 switch of claim 7 wherein the software that causes the one or more processors to process the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets comprises software that causes the one or more processors to: determine whether the router-to-router Layer 3 multicast control message is the PIM hello message or the PIM join or PIM prune message; andif the router-to-router Layer 3multicast control message is the PIM hello message, create a neighbor list that identifies: an IP address of a router that sent the PIM hello message; andan incoming port of the Layer 2 switch on which the PIM hello message was received. 11. The Layer 2 switch of claim 10 wherein the software that causes the one or more processors to process the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets further comprises software that causes the one or more processors to: if the router-to-router Layer 3 multicast control message is the PIM join or PIM prune message: determine a multicast mode of operation specified by the PIM join or PIM prune message;create a first set of forwarding information tables in a forwarding content addressable memory (CAM) of the Layer 2 switch if the multicast mode of operation corresponds to an explicit source distribution tree; andcreate a second set of forwarding information tables in the forwarding CAM if the multicast mode of operation corresponds to a shared source distribution tree. 12. The Layer 2 switch of claim 7 wherein the one or more processors process the router-to-router Layer 3 multicast control message and create the forwarding information prior to transmitting the router-to-router Layer 3 multicast control message to its designated destination router. 13. A non-transitory computer readable storage medium having stored thereon a program of instructions that, when executed by a processor of a Layer 2 switch, causes the processor of the Layer 2 switch to: receive a router-to-router Layer 3 multicast control message, the router-to-router Layer 3 multicast control message being either: a Protocol Independent Multicast (PIM) hello message transmitted by a router to announce the router's presence to other neighboring routers; ora PIM join or PIM prune message transmitted by a router to identify multicast group memberships to other neighboring routers; andprocess the router-to-router Layer 3 multicast control message to create forwarding information for use by the Layer 2 switch in forwarding multicast content packets. 14. The non-transitory computer readable storage medium of claim 13 wherein the forwarding information comprises: a discovery list storing instances of the PIM hello message received by the processor;a forwarding table storing outgoing port indexes corresponding to physical addresses derived from multicast group addresses; andan outgoing port lookup table storing outgoing ports for outgoing port indexes. 15. The non-transitory computer readable storage medium of claim 14 wherein the forwarding information further comprises: a source-group table storing a listing of multicast groups serviced by the processor; anda session table storing a plurality of session entries, each session entry identifying a multicast group, a source address, a destination address, a protocol type, an incoming port, and a corresponding outgoing port index. 16. The non-transitory computer readable storage medium of claim 13 wherein the instructions that cause the processor to process the router-to-router Layer 3 multicast control message to create forwarding information for use in forwarding multicast content packets comprises instructions that cause the processor to: determine whether the router-to-router Layer 3 multicast control message is the PIM hello message or the PIM join or PIM prune message; andif the router-to-router Layer 3 multicast control message is the PIM hello message, create a neighbor list that identifies: an IP address of a router that sent the PIM hello message; andan incoming port on which the PIM hello message was received. 17. The non-transitory computer readable storage medium of claim 16 wherein the instructions that cause the processor to process the router-to-router Layer 3 multicast control message to create forwarding information for use in forwarding multicast content packets further comprises instructions that cause the processor to: if the router-to-router Layer 3 multicast control message is the PIM join or PIM prune message: determine a multicast mode of operation specified by the PIM join or PIM prune message;create a first set of forwarding information tables in a forwarding content addressable memory (CAM) if the multicast mode of operation corresponds to an explicit source distribution tree; andcreate a second set of forwarding information tables in the forwarding CAM if the multicast mode of operation corresponds to a shared source distribution tree. 18. The non-transitory computer readable storage medium of claim 13 wherein the processor processes the router-to-router Layer 3 multicast control message and creates the forwarding information prior to transmitting the router-to-router Layer 3 multicast control message to its designated destination router.

이 특허에 인용된 특허 (103)

Holden Brian D. (Sunnyvale CA), ATM switching element and method having independently accessible cell memories.
상세보기
Shannon Steven, Access control of networked data.
상세보기
Olson Jeffrey J. (Boulder CO) Peck Stephen R. (Boulder CO) Seaton David P. (Boulder CO), Alternate routing arrangement.
상세보기
Videlock Gary B. (Foxborough MA) Gocht Russell C. (North Attleboro MA) Freitas AnneMarie (E. Walpole MA) Freitas Mark J. (E. Walpole MA), Apparatus and method for learning and filtering destination and source addresses in a local area network system.
상세보기
Tasman,Mitchell Paul; Redi,Jason Keith; Pearson,David Spencer, Architecture and mechanism for forwarding layer interfacing for networks.
상세보기
Pashan, Mark A., Asynchronous transfer mode (ATM) switch fabric.
상세보기
Calvert Nathanial (Rochester MN) Koehler John L. (Rochester MN) Lindberg Erik D. (Rochester MN) McKelvey Mark A. (Rochester MN) Mervosh Steven P. (Rochester MN) Newton Jeffrey A. (Rochester MN) Scarb, Automated enrollment of a computer system into a service network of computer systems.
상세보기
Ben-Artzi Amatzia (Sunnyvale CA), Bridge system for connecting networks.
상세보기
Perlman Radia J. (Acton MA) Koning G. Paul (Brookline NH), Bridge-like internet protocol router.
상세보기
Turner Jonathan S. (University City MO), Broadcast packet switching network.
상세보기
Safadi Reem, CATV communication system for changing first protocol syntax processor which processes data of first format to second p.
상세보기
Ainscow Frank (Winchester GB2), Communication network.
상세보기
Tsukakoshi Masato (Yokohama JPX) Takahashi Yasuhiro (Fujisawa JPX) Terada Matsuaki (Machida JPX) Kusaka Kenji (Hadano JPX), Communication network system having a plurality of different protocal LAN\s connected through a bridge.
상세보기
Abraham Menachem (Lexington MA) Bartolini David (Dudley MA) Ben-Meir Samuel (Sharon MA) Carmi Ilan (Framingham MA) Cook ; III John L. (Southborough MA) Hart Ira (Cambridge MA) Herman Alex (Sharon MA), Communication system concentrator configurable to different access methods.
상세보기
Waite David P. (Alexandria VA) Riddell Horace G. (Chantilly VA), Communications network for communicating with computers provided with disparate protocols.
상세보기
Conway John W. (Waltham MA) Farrell Robert J. (Wakefield MA) Hirtle Allen C. (Littleton MA) Niessen Leonard E. (Framingham MA), Controller for controlling multiple LAN types.
상세보기
Chiappa J. Noel (708 E. Woodland Dr. Grafton VA 23692), Data packet switch using a primary processing unit to designate one of a plurality of data stream control circuits to se.
상세보기
Ahmed, Fahim, Distributed control memory network.
상세보기
Auerbach Joshua S. (Ridgefield CT) Drake ; Jr. John E. (Pittsboro NC) Gopal Prabandham M. (Wayne NJ) Hervatic Elizabeth A. (Apex NC) Kaplan Marc A. (Katonah NY) Kutten Shay (Rockaway NJ) Peters Marci, Distributed management communications network.
상세보기
Hayden Peter C., Dynamic assignment of multicast network addresses.
상세보기
Hashimoto Akira (Tokyo JPX) Ito Yuji (Shizuoka JPX), Dynamic updating of routing information for routing packets between LAN\s connected to a plurality of routers via a publ.
상세보기
Momirov Milan, Efficient path based forwarding and multicast forwarding.
상세보기
Turner Jonathan S. (Evanston IL), End-to-end information memory arrangement in a line controller.
상세보기
Sistanizadeh, Kamran; Tashayod, Alex; Bashaw, Lynn Eric; Kamali, Masoud M.; Collar, Craig Robert, Enhanced data switching/routing for multi-regional IP over fiber network.
상세보기
Huang Gang (Middletown NJ), FDDI bridge frame learning and filtering apparatus and method.
상세보기
Turner Jonathan S. (Evanston IL), Fast packet switch.
상세보기
Buhrke Rolfe E. (Westchester IL) Davis James A. (Glen Ellyn IL) Spencer Douglas A. (Boulder CO), Fast packetized data delivery for digital networks.
상세보기
Abraham Menachem (Lexington MA) Bartolini David (Dudley MA) Ben-Meir Samuel (Sharon MA) Carmi Ilan (Framingham MA) Cook ; III John L. (Southborough MA) Hart Ira (Cambridge MA) Herman Alex (Sharon MA), Generic backplane system which is configurable to serve different network access methods simultaneously.
상세보기
Sheehy David B. (Roseville CA), Group address translation through a network bridge.
상세보기
Li, Yunzhou, Hierarchical multicast traffic security system in an internetwork.
상세보기
Christensen Gary S. (North Oaks MN), Hub controller for providing deterministic access to CSMA local area network.
상세보기
Ross Floyd E. (Warrington PA), Hub for segmented virtual local area network with shared media access.
상세보기
Doeringer Willibald (Langnau am Albis CHX) Dykeman Douglas (Rueschlikon NC CHX) Edwards Allan K. (Raleigh NC) Pozefsky Diane P. (Chapel Hill NC) Sarkar Soumitra (Cary NC) Turner Roger D. (Cary NC), Inter-domain multicast routing.
상세보기
Hoare David P. (Hitchin GB2) Warner David J. (Baldock GB2), Interconnection of communications networks.
상세보기
Sugiyama Takashi (Tokyo JPX), Local area network bridge apparatus with dedicated packet filtering mechanism.
상세보기
Beierle John D. (Freehold NJ) Sherman Brian (Marlboro MA), Local area voice/data communications and switching system.
상세보기
Drake ; Jr. John E. (Apex NC) Hervatic Elizabeth A. (Apex NC), Maintenance of message distribution trees in a communications network.
상세보기
Backes Floyd J. (Temple NH) Hawe William R. (Pepperell MA) Koning G. Paul (Brookline NH) Mitton David J. (Arlington MA) Perlman Radia J. (Acton MA), Many to few group address translation through a network bridge.
상세보기
Fenner Peter R. (600 Goodwin Dr. Richardson TX 75081), Message routing system for shared communication media networks.
상세보기
Crayford Ian, Method and apparatus for auto-incrementing through table and updating single register in memory.
상세보기
Hart John H. (Campbell CA) Baker Frederick J. (Santa Clara CA), Method and apparatus for bridging local area networks.
상세보기
Takao Mitsuji (Tokyo JPX), Method and apparatus for effecting multi-station data transmission having a variable next station address.
상세보기
Tang, Cheng; Naik, Chickayya G.; Davar, Jonathan; Cai, Yiqun, Method and apparatus for multicast switching using a centralized switching engine.
상세보기
Pitcher Derek H. ; Ferguson Earl, Method and apparatus for processing data packets in a network.
상세보기
Bosack Leonard (Atherton CA), Method and apparatus for routing communications among computer networks.
상세보기
Williams Richard (Leominster MA), Method and apparatus for secure data packet bus communication.
상세보기
Perlman Radia J. (Acton MA) Kaufman Charles W. (Northborough MA) Thomas Robert E. (Westboro MA) Hawe William R. (Peppeell MA), Method and apparatus for selective interleaving in a cell-switched network.
상세보기
Johnson Bobby ; Yip Michael ; Ferguson Earl ; Goguen Michael L., Method and apparatus for transmitting data frames between switches in a meshed data network.
상세보기
Hardwick Ken (Sherwood OR) Stone Geoffrey C. (Minneapolis MN), Method and apparatus for virtual switching.
상세보기
Jain, Nitin; Chen, Lee; Ferguson, Earl; Zhu, Min, Method and system for intelligently forwarding multicast packets.
상세보기
Ranjan, Ashish; Saravanan, Desikan, Method and system for multicast traffic reduction.
상세보기
Green Mark A. (Albany CA), Method and system of multicast routing for groups with a single transmitter.
상세보기
Sheehy David B. (Roseville CA), Method for data transfer through a bridge to a network requiring source route information.
상세보기
Matthews Wallace (North Hampstead NH), Method for determining a best path between two nodes.
상세보기
Dobbins Kurt ; Andlauer Phil ; Skubisz Michael, Method for establishing restricted broadcast groups in a switched network.
상세보기
Flammer George H. (San Jose CA) Kalkwarf Robert L. (San Jose CA), Method for routing packets in a packet communication network.
상세보기
Perlman Radia J. (Acton MA) Shand Ian M. C. (Cobham GBX) Gunner Christopher W. (Harvard MA), Method for supporting foreign protocols across backbone network by combining and transmitting list of destinations that.
상세보기
Perlman Radia (Acton MA), Method of multicast message distribution.
상세보기
Perlman Radia (Acton MA), Method of multicast message distribution.
상세보기
Auerbach Joshua S. (Ridgefield CT) Chow Chee-Seng (Ossining NY) Drake ; Jr. John E. (Pittsboro NC) Gopal Prabandham M. (Wayne NJ) Hervatic Elizabeth A. (Apex NC) Kaplan Marc A. (Katonah NY) Peters Ma, Multicast communication tree creation and control method and apparatus.
상세보기
Gallo, Anthony Matteo; Rovner, Sonia Kiang; Vaidhyanathan, Natarajan; Woodland, Gail Irene, Multicast forwarding table processor.
상세보기
Gershon, Benny; Katzri, Lior; Shwartsburd, Yuri, Multicast registration of all multicast flows in an asynchronous transfer mode based emulated LAN.
상세보기
Francis Paul T. (Morristown NJ) Ballardie Anthony J. (Alstonefield GB2) Crowcroft Jonathan A. (London GB2), Multicast routing using core based trees.
상세보기
Haggerty William T. ; Andlauer Phillip ; Negus Stephen H., Multicast switching.
상세보기
Wu, Ishan; Chandika, Nagarani; Mellacheruva, Ramana; Cai, Yiqun, Multicast system for forwarding desired multicast packets in a computer network.
상세보기
Callon Ross W. (Bedford MA), Multiple protocol routing.
상세보기
Callon Ross W. (Bedford MA) Perlman Radia J. (Acton MA) Rosen Eric C. (Arlington MA) Harper John (Reading GB2), Multiple protocol routing.
상세보기
Chang Paul (Peekskill NY) Coates Joseph W. (Cary NC) Ku Edward H. C. (Cary NC) Sanaye Simin H. (Raleigh NC), Multiport LAN bridge.
상세보기
Smith David D. (Raleigh NC), Network bridge.
상세보기
Virgile Kenneth, Network bridge with multicast forwarding table.
상세보기
Virgile Kenneth (Lexington MA), Network bridge with multicast forwarding table.
상세보기
Virgile, Kenneth, Network device with multicast forwarding data.
상세보기
Dobbins Kurt (Bedford NH) Andlauer Phil (Londonderry NH) Oliver Chris (Rochester NH) Parker Tom (Merrimack NH) Grimes Andy (Cape Neddick ME) Nutbrown Bruce (Campton NH) Hullette Dan (Wilton NH) Dev R, Network having secure fast packet switching and guaranteed quality of service.
상세보기
Benjamin Jay H. (Kingston NY) Gray James P. (Chapel Hill NC) Hayward Royal C. (Cary NC) Hess Matthew L. (Raleigh NC) McGriff Frederick E. (Gechingen NC DEX) Miller Ellis L. (Raleigh NC) Weingarten Ro, Network interconnection without integration.
상세보기
Li, Yunzhou, Network packet routing.
상세보기
Herman Alexander (Sharon MA), Networking circuitry.
상세보기
Baratz Alan E. (Chappaqua NY) Drake ; Jr. John E. (Pittsboro NC) Grover George A. (Mahopac NY) Gray James P. (Chapel Hill NC) Pollard Melinda R. (Raleigh NC) Pozefsky Diane P. (Chapel Hill NC) Rafalo, Node initiating XID exchanges over an activated link including an exchange of sets of binding signals between nodes for.
상세보기
Frank Steven J. (Hopkinton MA) Burkhardt ; III Henry (Manchester MA) Rothnie James B. (Brookline MA) Epstein David I. (Boxborough MA) Morss Stephen W. (Somerville MA) Kelly Dana R. (Westford MA) Bind, Packet routing switch.
상세보기
O\Dowd Michael B. (Victoria AUX), Packet switching.
상세보기
Liu Vince (Saratoga CA) Sun Shirley (Tsyr-Yi) (Sunnyvale CA) Ko Alan (Sunnyvale CA), Remote communication server with automatic filtering.
상세보기
Nagami Kenichi,JPX ; Katsube Yasuhiro,JPX, Router device and datagram transfer method for data communication network system.
상세보기
Perlman Radia J. (Acton MA) Kirby Alan J. (Hollis NH) Backes Floyd J. (Temple NH) Kaufman Charles W. (Northborough MA), Router using multiple hop redirect messages to enable bridge like data forwarding.
상세보기
Hendel Ariel ; Muller Shimon ; Zaumen William T. ; Yeung Louise, Routing in a multi-layer distributed network element.
상세보기
Yacoby Amnon (Doar Na Modiim ILX), Routing system to interconnect local area networks.
상세보기
Muller Shimon ; Hendel Ariel ; Yeung Louise, Search engine architecture for a high performance multi-layer switch element.
상세보기
Rothschild Jeffrey Jackiel ; Samuel Daniel Joseph ; Kwiatkowski Marc Peter, Server-group messaging system for interactive applications.
상세보기
Harvey George A. (Maynard MA) Koning Gerard (Brookline NH) Hawe William (Pepperell MA) Lauck Anthony (Wellesley MA) Oran David (Bloomington IN) Harper John (Basingstoke GB2) Miles Kevin (Reading GB2), Session control in network for digital data processing system which supports multiple transfer protocols.
상세보기
Kerstein Denise, Shared address table with source and destination two-pass algorithm.
상세보기
Bayer Franz (Elzach DEX) Grosch Karl (Wuppertal DEX), Spacers for use in multiple-pane windows or the like.
상세보기
Golan Oded,ILX ; Tivon Rina,ILX ; Kruk Meir,ILX ; Lebovich Gil,ILX ; Goldenberg Zvika,ILX ; Pivonya Gilad,ILX ; Perelman Mark,ILX ; Dician Yaron,ILX, Switch monitoring system having a data collection device using filters in parallel orientation and filter counter for counting combination of filtered events.
상세보기
Hoffman Don ; Murthy Shree ; Khamisy Asad, System and method for a quality of service in a multi-layer network element.
상세보기
Oliver Chris (Rochester NH) Hullette Dan (Wilton NH), System and method for allocating a shared resource among competing devices.
상세보기
Gang ; Jr. Joseph M. (Saratoga CA), System and method for bridging local area networks using concurrent broadband channels.
상세보기
Tang, Cheng; Naik, Chickayya G., System and method for distributing multicasts in virtual local area networks.
상세보기
Iturralde Carol E., System for broadcasting messages to each of default VLAN ports in subset of ports defined as VLAN ports.
상세보기
Gleeson Bryan J. ; Khabardar Percy P. ; Finn Norman W., System for efficient multicast distribution in a virtual local area network environment.
상세보기
Owens Gary L. (Mountain View CA), System for interconnecting applications across different networks of data processing systems by mapping protocols across.
상세보기
Backes Floyd J. (Temple NH) Varghese George (Bradford MA) Kaufman Charles W. (Northboro MA), Transparent load sharing for parallel networks.
상세보기
Albal Nandakishore A. (Sunrise FL), Transparent packet access over d-channel of ISDN.
상세보기
Patra,Abhijit; Xu,Milton; Marimuthu,Peram; Wang,Jeffrey, VC sharing for multicast in a computer network.
상세보기
Varghese, George; Bassett, John; Thomas, Robert Eugene; Higginson, Peter; Cobb, Graham; Spinney, Barry A.; Simcoe, Robert, Virtual LANs.
상세보기
Perlman Radia J. (Acton MA) Hawe William R. (Pepperell MA), Virtual circuit manager for multicast messaging.
상세보기
Burnett John L. (Cupertino CA) Newman Peter (Mountain View CA), Virtual network using asynchronous transfer mode.
상세보기

IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Method and system for intelligently forwarding multicast packets 원문보기

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연합인증

Method and system for intelligently forwarding multicast packets 원문보기

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연구과제 타임라인

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