Patent US5303237A successfully refreshed from Google Patents.
US5303237A
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Frame relay system capable of handling both voice and data frames
Assignee: International Business Machines Corp
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Filing: 1992-07-31
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Granted: 1994-04-12
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Expires: 2012-07-31
Abstract
Abstract Modifications to existing frame relay communication protocols are described which permit both voice and data frames to be handled in an integrated frame relay system. A Voice Frame Identifier bit is defined in the address field of a frame. When an intermediate node detects a voice frame, a CRC operation is performed using only the frame header; that is, voice information is excluded from the computation. The frame is flagged for priority processing in the node. When the intermediate node detects a data frame the CRC operation uses both the header and the data fields.
Inventors
- 👤 William C. Bergman
- 👤 Janakirama R. Cherukuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:22
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/64; H04L12/6418; H04L12/5601; H04L2012/5629; H04L2012/5631; H04L2012/5632; H04L2012/5635; H04L2012/5638; H04L2012/5645; H04L2012/5646; H04L2012/5652; H04L2012/6464; H04L2012/647; H04L2012/6481
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A frame relay communication system capable of transmitting both digital data frames and voice frames, said system comprising a plurality of nodes interconnected by communication links, at least one of said nodes including: means for receiving a frame on an oncoming link; means for detecting whether said frame is a digital data frame or a voice frame; means responsive where said frame has been identified as a voice frame to perform an error checking operation only on a first set of fields of the frame, said first set of fields excluding data fields, said means being responsive to said frame having been identified as a data frame to perform an error checking operation on a second set of fields, said second set of fields including data fields.
Claim 2
Dependent Claim
127 words
A frame relay communication system capable of transmitting both digital data frames and voice frames, said system comprising a plurality of nodes interconnected by communication links, at least one of said nodes including: means for receiving a frame on an oncoming link; means for detecting whether said frame is a digital data frame or a voice frame; means responsive where said frame has been identified as a voice frame to perform an error checking operation only on a first set of fields of the frame, said first set of fields excluding data fields, said means being responsive to said frame having been identified as a data frame to perform an error checking operation on a second set of fields, said second set of fields including data fields.
Claim 3
Dependent Claim
41 words
A frame relay communication system as defined in claim 1 further including means responsive to a frame having been identified as a voice frame to further identify the frame as one which should be placed in a high priority output queue.
Claim 4
Dependent Claim
111 words
In a frame relay communication system comprising a plurality of nodes interconnected by communication links, a method of processing both digital data frames and voice frames in at least one node comprising the steps of: receiving a frame from an incoming link; identifying the frame as a voice frame or a data frame; if the frame is a voice frame, performing an error check only on a first set of fields in the frame, said first set of fields excluding data fields; and if the frame is a data frame, performing an error check on a second set of fields in the frame, said second set of fields including data fields.
Claim 5
Dependent Claim
111 words
In a frame relay communication system comprising a plurality of nodes interconnected by communication links, a method of processing both digital data frames and voice frames in at least one node comprising the steps of: receiving a frame from an incoming link; identifying the frame as a voice frame or a data frame; if the frame is a voice frame, performing an error check only on a first set of fields in the frame, said first set of fields excluding data fields; and if the frame is a data frame, performing an error check on a second set of fields in the frame, said second set of fields including data fields.
Claim 6
Dependent Claim
36 words
A method as defined in claim 3 further including the step of identifying the frame as one which should be placed in high priority output queue where the frame has been identified as a voice frame.
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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) | 1997-04-11 | 1997-10-11 | 1998-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-11 | 2001-10-11 | 2002-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-11 | 2005-10-11 | 2006-04-12 | $7700.00 | Window Closed / Lapsed |