US5475685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-media flow control over FDDI synchronous networks
Assignee: International Business Machines Corp
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Filing: 1994-12-07
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Granted: 1995-12-12
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Expires: 2014-12-07
Abstract
Abstract A flow control protocol is used to optimize the throughput on transmission opportunities without exceeding the allocated bandwidth in a Fiber optic Distributed Data Interface (FDDI) Local Area Network (LAN). The flow control protocol limits the number of flames that a station can chain together to a maximum number that insures that the station does not exceed its bandwidth allocation per Token opportunity. When this maximum number is reached, the current chain is placed in a first-in, first-out (FIFO) queue to await the next transmission opportunity. When a chain is enabled for transmission, subsequent flames are placed on a free standby chain, and this process continues until the maximum allowed number of frames is reached. By either chaining together fewer flames than the maximum number or continuing to the maximum number, the number of frames to be chained together in the current chain is optimized providing improved performance.
Inventors
- 👤 Donald R. Garris
- 👤 Donald R. Staddon, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
H; H04; H04L; H04L47/00; H04L47/10; H04L12/00; H04L12/28; H04L12/42; H04L12/427; H04L12/433; Y; Y10; Y10S; Y10S370/00; Y10S370/901; Y10S370/902; Y10S370/903; Y10S370/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
In a Fiber optic Distributed Data Interface (FDDI) network, a flow control protocol used to optimize the throughput on transmission opportunities without exceeding an allocated bandwidth in said Fiber optic Distributed Data Interface (FDDI) network, said Fiber optic Distributed Data Interface (FDDI) network supporting synchronous transmission of multimedia data among a plurality of stations connected to the network, said flow control protocol comprising the steps of: limiting a number of frames that a station can chain together to a maximum number that insures that the station does not exceed its bandwidth allocation per transmission opportunity; building at a station a chain of frames for transmission on the network; calculating an optimal number of frames for chaining prior to placing a chain in a transmission queue; and completing a chain having said optimal number of frames before the maximum number of frames are chained together to optimize throughput by a reduction in bit rate or in the event of an early transmission opportunity.
Claim 2
Dependent Claim
162 words
In a Fiber optic Distributed Data Interface (FDDI) network, a flow control protocol used to optimize the throughput on transmission opportunities without exceeding an allocated bandwidth in said Fiber optic Distributed Data Interface (FDDI) network, said Fiber optic Distributed Data Interface (FDDI) network supporting synchronous transmission of multimedia data among a plurality of stations connected to the network, said flow control protocol comprising the steps of: limiting a number of frames that a station can chain together to a maximum number that insures that the station does not exceed its bandwidth allocation per transmission opportunity; building at a station a chain of frames for transmission on the network; calculating an optimal number of frames for chaining prior to placing a chain in a transmission queue; and completing a chain having said optimal number of frames before the maximum number of frames are chained together to optimize throughput by a reduction in bit rate or in the event of an early transmission opportunity.
Claim 3
Dependent Claim
41 words
The flow control protocol recited in claim 1 further comprising the step of completing a chain with the maximum number of frames to achieve the maximum throughput for an allocated bit rate or in the event of a late transmission opportunity.
Claim 4
Dependent Claim
54 words
The flow control protocol recited in claim 1 wherein a total number of bytes per a negotiated response time, T Negotiated, is T and a selected frame size is F bytes/frame, then a maximum number, n, of frames which can be chained together in an active session is T/F rounded up to nearest integer.
Claim 5
Dependent Claim
21 words
The flow control protocol recited in claim 3 wherein packetization of data into frames is based on a fixed byte count.
Claim 6
Dependent Claim
20 words
The flow control protocol recited in claim 3 wherein packetization of data into frames is based on fixed time intervals.
Claim 7
Dependent Claim
167 words
A multimedia network comprising: a Fiber optic Distributed Data Interface (FDDI) network connecting a plurality of stations supporting multimedia applications, said Fiber optic Distributed Data Interface (FDDI) network supporting synchronous transmission of multimedia data among a plurality of stations connected to the network; and means in said Fiber optic Distributed Data Interface (FDDI) network implementing a flow control protocol to optimize the throughput on transmission opportunities without exceeding an allocated bandwidth, said flow control protocol limiting a number of frames that a station can chain together to a maximum number that insures that the station does not exceed its bandwidth allocation per transmission opportunity, building at a station a chain of frames for transmission on the network, and calculating an optimal number of frames for chaining prior to placing a chain in a transmission queue wherein said chain is completed before the maximum number of frames are chained together to optimize throughput by a reduction in bit rate or in the event of an early transmission opportunity.
Claim 8
Dependent Claim
167 words
A multimedia network comprising: a Fiber optic Distributed Data Interface (FDDI) network connecting a plurality of stations supporting multimedia applications, said Fiber optic Distributed Data Interface (FDDI) network supporting synchronous transmission of multimedia data among a plurality of stations connected to the network; and means in said Fiber optic Distributed Data Interface (FDDI) network implementing a flow control protocol to optimize the throughput on transmission opportunities without exceeding an allocated bandwidth, said flow control protocol limiting a number of frames that a station can chain together to a maximum number that insures that the station does not exceed its bandwidth allocation per transmission opportunity, building at a station a chain of frames for transmission on the network, and calculating an optimal number of frames for chaining prior to placing a chain in a transmission queue wherein said chain is completed before the maximum number of frames are chained together to optimize throughput by a reduction in bit rate or in the event of an early transmission opportunity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |