Patent US5831985A successfully refreshed from Google Patents.
US5831985A
Expired / Lapsed
US
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Method and apparatus for controlling concurrent data transmission from multiple sources in a channel communication system
Assignee: EMC Corp
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Filing: 1997-08-05
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Granted: 1998-11-03
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Expires: 2017-08-05
Abstract
Abstract A method and apparatus for communicating multiple threads, concurrently on a single channel, features a process for prioritizing and limiting the transmission time allocated to any particular host. The invention features providing a channel switch capable of communicating with a plurality of client sources, the sources being connected for transmitting frames of data to the channel, and to at least one storage device connected to the channel. The information transmission is formatted and controlled at the switch in accordance with a frame protocol and the protocol provides a predetermined method for selecting which information host to connect to which channel and for how long. The switch allocates connection line capacity to the sources according to a selected priority and the credit or buffer available to the source. Accordingly, an average priority waiting is associated with each information source.
Inventors
- 👤 Miklos A. Sandorfi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:35
CPC Classifications
H; H04; H04L; H04L47/00; H04L47/10; H04J; H04J3/00; H04J3/16; H04J3/1682
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
A data communications system comprising a channel switch, a plurality of client information sources connected over data communications channels to said channel switch for transmitting frames of data, at least one peripheral device connected by a data channel to said channel switch, said channel switch combining information from said information sources according to a frame protocol, said protocol defining a predetermined method for selecting which pending information source data to deliver to said peripheral device, and for limiting the connection line capacity of each source to a non-zero selected number of frames of data based upon connection criteria parameters that can vary from information source to information source.
Claim 2
Dependent Claim
108 words
A data communications system comprising a channel switch, a plurality of client information sources connected over data communications channels to said channel switch for transmitting frames of data, at least one peripheral device connected by a data channel to said channel switch, said channel switch combining information from said information sources according to a frame protocol, said protocol defining a predetermined method for selecting which pending information source data to deliver to said peripheral device, and for limiting the connection line capacity of each source to a non-zero selected number of frames of data based upon connection criteria parameters that can vary from information source to information source.
Claim 3
Dependent Claim
126 words
A fibre channel communications system comprising a fibre channel switch, a plurality of client information sources connected to said fibre channel switch for transmitting frames of data, at least one mass storage device connected by a data channel to said fibre switch, said fibre channel switch combining information from said information sources according to a frame protocol, said protocol defining a predetermined method for selecting which information source data to deliver to said storage device, and for limiting the connection line capacity of each source to a non-zero selected number of frames of data, at least some sequences of frames on the data channel containing a number of data frames less than the number of frames forming a natural sequence boundary at the client information source.
Claim 4
Dependent Claim
126 words
A fibre channel communications system comprising a fibre channel switch, a plurality of client information sources connected to said fibre channel switch for transmitting frames of data, at least one mass storage device connected by a data channel to said fibre switch, said fibre channel switch combining information from said information sources according to a frame protocol, said protocol defining a predetermined method for selecting which information source data to deliver to said storage device, and for limiting the connection line capacity of each source to a non-zero selected number of frames of data, at least some sequences of frames on the data channel containing a number of data frames less than the number of frames forming a natural sequence boundary at the client information source.
Claim 5
Dependent Claim
35 words
The apparatus of claim 2 wherein said fibre channel switch limits the selected number of frames to each source depending upon a priority value assigned to the source and the credit available to the source.
Claim 6
Dependent Claim
18 words
The apparatus of claim 3 further comprising means for determining the current credit available to each information source.
Claim 7
Dependent Claim
23 words
The apparatus of claim 3 further comprising means for providing priority average weighing to each information source according to said assigned priority value.
Claim 8
Independent Claim
83 words
A method of communicating frames of data through a channel switch between a plurality of client information sources having pending data and a peripheral device comprising the steps of determining the credit available to each of the information sources, determining a priority value, expressed as a non-zero number of frames, dedicated to each of the information sources, and communicating with said connected client information sources in a round robin protocol taking into account the credit and priority value associated with each information source.
Claim 9
Independent Claim
83 words
A method of communicating frames of data through a channel switch between a plurality of client information sources having pending data and a peripheral device comprising the steps of determining the credit available to each of the information sources, determining a priority value, expressed as a non-zero number of frames, dedicated to each of the information sources, and communicating with said connected client information sources in a round robin protocol taking into account the credit and priority value associated with each information source.
Claim 10
Independent Claim
121 words
A method of communicating frames of data through a fibre channel switch between a plurality of client information sources and a storage system having at least one mass storage device comprising the steps of determining the credit available to each of the information sources, determining a priority value, expressed as a non-zero number of frames, dedicated to each of the information sources, and communicating with said connected client information sources in a round robin protocol taking into account the credit and priority value associated with each information source, at least some sequences of frames on the data channel containing a number of data frames less than the number of data frames forming a natural sequence boundary at the client information source.
Claim 11
Independent Claim
121 words
A method of communicating frames of data through a fibre channel switch between a plurality of client information sources and a storage system having at least one mass storage device comprising the steps of determining the credit available to each of the information sources, determining a priority value, expressed as a non-zero number of frames, dedicated to each of the information sources, and communicating with said connected client information sources in a round robin protocol taking into account the credit and priority value associated with each information source, at least some sequences of frames on the data channel containing a number of data frames less than the number of data frames forming a natural sequence boundary at the client information source.
Claim 12
Dependent Claim
47 words
The method of claim 7 further comprising the steps of: limiting each transmission of data for a client source to a number of frames which is the lessor of an amount determined by each of the frame priority value and an amount determined by the source credit.
Claim 13
Dependent Claim
29 words
The method of claim 8 further wherein said frames of data are organized into sequences of frames and said credit represents a buffer capacity available along said transmission path.
Claim 14
Dependent Claim
25 words
The method of claim 7 further comprising the steps of effecting bandwidth priority averaging by associating said priority value to each different client information source.
References Cited (Backward Citations)
US4445116A
Cited
US4964034A
Cited
US5388228A
Cited
US4942553A
Cited
US4979099A
Cited
US4980886A
Cited
US4953081A
Cited
US5132966A
Cited
US5151994A
Cited
US5263163A
Cited
US5231633A
Cited
US5239651A
Cited
US5265212A
Cited
US5301283A
Cited
US5367679A
Cited
US5388097A
Cited
US5392434A
Cited
US5432824A
Cited
US5515359A
Cited
US5519695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-02 | 2002-05-04 | 2002-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-02 | 2006-05-04 | 2006-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-02 | 2010-05-04 | 2010-11-03 | $7700.00 | Window Closed / Lapsed |