[특허]Multimode resource arbiter providing round robin arbitration or a modified priority arbitration

Multimode resource arbiter providing round robin arbitration or a modified priority arbitration 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-013/14 G06F-013/00
출원번호	US-0455759 (1989-12-22)
발명자 / 주소	Gallagher Andrew M. (Long Beach NY)
출원인 / 주소	Harris Corporation (Melbourne FL 02)
인용정보	피인용 횟수 : 26 인용 특허 : 0

초록 ▼

A multimode shared resource arbiter circuit is provided by a programmable array logic module programmed to provide round robin arbitration, or round robin/modified priority arbitration between requests for access to a shared resource, such as a data bus, which is normally provided with only priority arbitration between different access requests. The programmable array logic module is programmed to provide a first option for a round robin arbitration system between different bus access requests, and a second option to put one bus request on a priority basis while other bus requests are round robin arbitrated. The programmable array logic module is programmed to provide a multistate counter cyclically driven between multiple count states by a clock, and each count state having associated therewith a particular request for access to the bus, and if a particular request for access to the bus becomes active while the counter is at its associated count state, the active request is granted and passed as an output, and the counter is frozen at the associated count state, and when the active request is released, the counter resumes being cyclically driven between its multiple count states to resume further round robin arbitration between access requests. The arbiter circuit of the present invention is also applicable to other shared resources such as a shared main storage, a shared RAM memory, etc.

대표청구항 ▼

A system for providing round robin arbitration between requests for access to a shared resource such as a data bus, the usage of which is shared in a time multiplex mode by a plurality of users of the shared resource, comprising a single central multistate counter associated with the shared resource which services all requests for access to the shared resource and is cyclically driven between multiple count states by a clock, and each count state having associated therewith a request for access to the shared resource by one of the plurality of users, and if one of the plurality of users requests access to the shared resource while the counter is at the count state associated with that user, the request for access to the shared resource is granted and the counter is frozen at the associated count state, and when the request for access to the shared resource is released, the counter resumes being cyclically driven between its multiple count states to resume further round robin arbitration between access requests until a request for access to the shared resource is received from one of the plurality of users while the counter is in the count state associated with that particular user, and if one of the plurality of users requests access to the shared resource while the counter is not at the count state associated with that user, the request for access to the shared resource is denied until the counter is driven to the count state associated with that user.

이 특허를 인용한 특허 (26)

Schmidt, Jens Anton Thomsen, Apparatus and method for providing round-robin arbitration.
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Mochida,Tetsuji; Yoshioka,Kosuke; Kiyohara,Tokuzo, Apparatus, method, and computer program for resource request arbitration.
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Zulian Ferruccio,ITX, Arbitraion unit with round-robin priority, particularly for multiprocessor systems with syncronous symmetrical processor.
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Barrenscheen,Jens; Herz,Karl; Vowe,Achim, Bus system.
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McFarland Harold L. (San Jose CA) Ho Allen P. (Fremont CA), Crossing transfers for maximizing the effective bandwidth in a dual-bus architecture.
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Kelley, Richard Allen; Neal, Danny Marvin; Thurber, Steven Mark, Enhanced bus arbiter utilizing variable priority and fairness.
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DeMarco, Stephen Christopher; MacAdam, Angus David Starr, Error management system and method for a packet switch.
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Ramanujan, Raj; Keller, James B.; Samaras, William A.; DeRosa, John; Stewart, Robert E., High speed bus system that incorporates uni-directional point-to-point buses.
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Ramanujan, Raj; Keller, James B.; Samaras, William A.; Derosa, John; Stewart, Robert E., High speed bus system that incorporates uni-directional point-to-point buses.
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Nicholas Ilyadis ; William J. Tiffany, Method and apparatus for arbitrating bus access amongst competing devices.
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Cooke Conrad C. (Witney GBX), Method and apparatus for arbitrating data requests and responses thereto as separate bus transactions.
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Powell Lawrence J., Method and apparatus for arbitrating resource requests utilizing independent tokens for arbiter cell selection.
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Ozveren Cuneyt M. ; Grella Ernest ; Cooper Jeffrey L. ; Hutchison Jerry D., Method and apparatus for reducing data loss in data transfer devices.
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Ilyadis Nicholas ; Tiffany William J., Method of round robin bus arbitration.
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Ng David Way, Multimedia arbiter and method using fixed round-robin slots for real-time agents and a timed priority slot for non-real-time agents.
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Douglass James M. ; Ledlow Dallas L., Multiple asynchronous event arbitrator.
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Kim, Eon-guk; Kim, Dae-gyu, Output driver operable over wide range of voltages.
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Tezcan, Bertan; Beane, William Terry; Darnell, Scott, Packet processing switch and methods of operation thereof.
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Gehman Judy M., Priority arbiter with shifting sequential priority scheme.
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Bhugra, Harmeet; Tezcan, Bertan, Processing switch for orthogonal frequency division multiplexing.
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Grice Donald G. (Kingston NY) Hochschild Peter H. (New York NY), Resource allocation synchronization in a parallel processing system.
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Kuddes David W. (Richardson TX) Longendyke Gregory J. (Rowlett TX), Round robin arbiter circuit apparatus.
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Horst Robert W. ; Watson William J. ; Sonnier David P., Routing arbitration for shared resources.
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Gulati, Ajay; Uysal, Mustafa; Merchant, Arif A., Scheduling requesters of a shared storage resource.
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Gibson, David, System and method for round robin arbitration.
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MacAdam, Angus David Starr; Preyer, Justin; Glaser, Alan, System and method of constructing data packets in a packet switch.
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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
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Multimode resource arbiter providing round robin arbitration or a modified priority arbitration 원문보기

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Multimode resource arbiter providing round robin arbitration or a modified priority arbitration 원문보기

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이 특허를 인용한 특허 (26)

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