US5535221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame length control in data transmission using ATM network
Assignee: Fujitsu Ltd
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Filing: 1992-08-13
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Granted: 1996-07-09
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Expires: 2012-08-13
Abstract
Abstract A length of an I field of an I frame in the data link layer is controlled in accordance with a rate of cells lost in an ATM layer. The loss rate of cells is calculated by watching sequence numbers included in the cells in an ATM adaptation layer.
Inventors
- 👤 Toshiyuki Hijikata
- 👤 Tetsuo Tachibana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:00
CPC Classifications
H; H04; H04L; H04L49/00; H04L49/15; H04L49/1553; H04L1/00; H04L1/0078; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5638; H04L2012/5646; H04L2012/5672
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A method of controlling a length of an information frame in a data transmission system, wherein transmitted data are divided into information frames and the information frames are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising the steps of: (i) detecting the rate of cells lost in the transmission on the network; (ii) determining the length of the information frame to operatively reduce the rate detected in step (i); and (iii) using the length determined in step (ii) as the length of the information frame.
Claim 2
Independent Claim
102 words
A method of controlling a length of an information frame in a data transmission system, wherein transmitted data are divided into information frames and the information frames are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising the steps of: (i) detecting the rate of cells lost in the transmission on the network; (ii) determining the length of the information frame to operatively reduce the rate detected in step (i); and (iii) using the length determined in step (ii) as the length of the information frame.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, wherein the steps (i) and (iii) are executed in a receiver side and the method further comprises the step of: (iv) communicating the determined length to a transmitter side.
Claim 4
Dependent Claim
45 words
A method as claimed in claim 1, wherein each cell includes a sequence number and the step (i) includes the substeps of: monitoring the sequence number of each cell, and calculating the rate of lost cells from monitoring the sequence number of each lost cell.
Claim 5
Independent Claim
104 words
An apparatus for controlling a length of an information frame in a data transmission system, wherein transmitted data are divided into information frames and the information frames are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising: means for detecting a rate of cells lost in the transmission on the network; means for determining the length of the information frame to operatively reduce the rate detected by the detecting means; and means for using the length determined by the determining means as the length of the information frame.
Claim 6
Independent Claim
104 words
An apparatus for controlling a length of an information frame in a data transmission system, wherein transmitted data are divided into information frames and the information frames are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising: means for detecting a rate of cells lost in the transmission on the network; means for determining the length of the information frame to operatively reduce the rate detected by the detecting means; and means for using the length determined by the determining means as the length of the information frame.
Claim 7
Dependent Claim
27 words
An apparatus as claimed in claim 4, further comprising: means for communicating the length determined by the determining means at a receiver side to a transmitter side.
Claim 8
Dependent Claim
49 words
An apparatus as claimed in claim 4, wherein each cell includes a sequence number and the detecting means comprises: means for monitoring the sequence number of each cell, and means for calculating the rate of lost cells from monitoring the sequence number of each cell by the monitoring means.
Claim 9
Independent Claim
107 words
A method of controlling a length of an information bit in a data transmission system, wherein transmitted data are divided into information bits and the information bits are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising the steps of: (i) detecting the rate of cells lost in the transmission on the network; (ii) controlling the length of the information bits to be shorter or longer in accordance with the rate detected in step (i); and (iii) using the length determined in step (ii) as the length of the information bit.
Claim 10
Independent Claim
107 words
A method of controlling a length of an information bit in a data transmission system, wherein transmitted data are divided into information bits and the information bits are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising the steps of: (i) detecting the rate of cells lost in the transmission on the network; (ii) controlling the length of the information bits to be shorter or longer in accordance with the rate detected in step (i); and (iii) using the length determined in step (ii) as the length of the information bit.
Claim 11
Independent Claim
109 words
An apparatus for controlling a length of an information bit in a data transmission system, wherein transmitted data are divided into information bits and the information bits are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising; means for detecting a rate of cells lost in the transmission on the network; means for controlling the length of the information bits to be shorter or longer in accordance with the rate detected by the detecting means; and means for using the length determined by the determining means as the length of the information bit.
Claim 12
Independent Claim
109 words
An apparatus for controlling a length of an information bit in a data transmission system, wherein transmitted data are divided into information bits and the information bits are further divided into fixed length data blocks to which routing data are added to form cells in order to be transmitted on a network, comprising; means for detecting a rate of cells lost in the transmission on the network; means for controlling the length of the information bits to be shorter or longer in accordance with the rate detected by the detecting means; and means for using the length determined by the determining means as the length of the information bit.
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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) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |