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US6097731A
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Data retransmission method used in confirmation information transmissions
Assignee: NEC Corp
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Filing: 1997-10-24
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Granted: 2000-08-01
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Expires: 2017-10-24
Abstract
Abstract A data retransmission method for a confirmation information transmission is provided which improves reliability of information transmission by preventing the loss of data when a transmission of data from layer 3 fails in layer 2. When transmitting layer-3-data from layer 3 to layer 2, layer 2 initiates timer observation and simultaneously transmits confirmation data to layer 1. If this transmission fails, a reply from layer 1 cannot be received and a retransmission procedure also fails, layer 2 notifies layer 3 of transmission failure, and simultaneously discards the layer-3-data. Layer 3 retransmits to layer 2 the layer-3-data which it previously transmitted, and layer 2 again transmits confirmation data to layer 1. If this transmission succeeds, layer 2 terminates the timer observation and notifies layer 3 of the successful transmission.
Inventors
- 👤 Shigehide Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:47
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18; H04L1/1803; H04L69/00; H04L69/30; H04L69/32; H04L69/322; H04L69/324; H04L69/325; H04L9/00; H04L9/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A data retransmission method for use in confirmation information transmissions comprising a transmission confirmation process for confirming the transmission of layer-3-data between layer 2 of an OSI reference model and layer 3 of said OSI reference model, wherein said transmission confirmation process comprises: sending from said layer 2 to said layer 3, in accordance with said transmission confirmation process, notification of a failure of a confirmation information transmission for said layer-3-data which occurs in said layer 2, and simultaneously discarding said layer-3-data in said layer 2; retransmitting said layer-3-data from said layer 3 to said layer 2, and transmitting again a confirmation information transmission for said layer-3-data in said layer 2.
Claim 2
Dependent Claim
111 words
A data retransmission method for use in confirmation information transmissions comprising a transmission confirmation process for confirming the transmission of layer-3-data between layer 2 of an OSI reference model and layer 3 of said OSI reference model, wherein said transmission confirmation process comprises: sending from said layer 2 to said layer 3, in accordance with said transmission confirmation process, notification of a failure of a confirmation information transmission for said layer-3-data which occurs in said layer 2, and simultaneously discarding said layer-3-data in said layer 2; retransmitting said layer-3-data from said layer 3 to said layer 2, and transmitting again a confirmation information transmission for said layer-3-data in said layer 2.
Claim 3
Dependent Claim
29 words
A data retransmission method used in confirmation information transmissions according to claim 1, wherein said notification of a failure of said confirmation information transmission is conducted using a primitive.
Claim 4
Dependent Claim
126 words
A data retransmission method used in confirmation information transmissions comprising: transmitting layer-3-data from layer 3 of an OSI reference model to layer 2 of said OSI reference model; transmitting a confirmation information transmission for said layer-3-data from said layer 2 to layer 1 of said OSI reference model; notifying a transmission result of said confirmation information transmission to said layer 3 from said layer 2 while simultaneously discarding said layer-3-data in said layer 2 when said confirmation information transmission fails; detecting that said notified transmission result indicates transmission failure; retransmitting said layer-3-data from said layer 3 to said layer 2; and transmitting again a confirmation information transmission for said layer-3-data from said layer 2 to said layer 1 using said layer-3-data retransmitted from said layer 3.
Claim 5
Dependent Claim
126 words
A data retransmission method used in confirmation information transmissions comprising: transmitting layer-3-data from layer 3 of an OSI reference model to layer 2 of said OSI reference model; transmitting a confirmation information transmission for said layer-3-data from said layer 2 to layer 1 of said OSI reference model; notifying a transmission result of said confirmation information transmission to said layer 3 from said layer 2 while simultaneously discarding said layer-3-data in said layer 2 when said confirmation information transmission fails; detecting that said notified transmission result indicates transmission failure; retransmitting said layer-3-data from said layer 3 to said layer 2; and transmitting again a confirmation information transmission for said layer-3-data from said layer 2 to said layer 1 using said layer-3-data retransmitted from said layer 3.
Claim 6
Dependent Claim
30 words
A data retransmission method used in confirmation information transmissions according to claim 3, wherein said notification of a transmission result of said confirmation information transmission is conducted using a primitive.
Claim 7
Dependent Claim
200 words
A data retransmission method used in confirmation information transmissions comprising: transmitting layer-3-data from layer 3 of an OSI reference model to layer 2 of said OSI reference model; initiating an observation operation for detecting transmission failure of said layer-3-data, in said layer 2, while simultaneously transmitting a confirmation information transmission for said layer-3-data to layer 1 of said OSI reference model; retransmitting said layer-3-data from said layer 2 to said layer 1 when failure of confirmation information transmission for said layer 1 is detected by means of said observation operation; discarding said layer-3-data in said layer 2 when failure of retransmission of said layer-3-data is detected, while simultaneously sending notification of transmission failure from said layer 2 to said layer 3; detecting notification of said transmission failure and retransmitting said layer-3-data from said layer 3 to said layer 2; initiating said observation operation in said layer 2, while simultaneously again transmitting, from said layer 2 to said layer 1, a confirmation information transmission for said layer-3-data based on said layer-3-data retransmitted from said layer 3; and terminating said observation operation in said layer 2 when said confirmation information transmission is successful, while simultaneously notifying transmission success to said layer 3.
Claim 8
Dependent Claim
200 words
A data retransmission method used in confirmation information transmissions comprising: transmitting layer-3-data from layer 3 of an OSI reference model to layer 2 of said OSI reference model; initiating an observation operation for detecting transmission failure of said layer-3-data, in said layer 2, while simultaneously transmitting a confirmation information transmission for said layer-3-data to layer 1 of said OSI reference model; retransmitting said layer-3-data from said layer 2 to said layer 1 when failure of confirmation information transmission for said layer 1 is detected by means of said observation operation; discarding said layer-3-data in said layer 2 when failure of retransmission of said layer-3-data is detected, while simultaneously sending notification of transmission failure from said layer 2 to said layer 3; detecting notification of said transmission failure and retransmitting said layer-3-data from said layer 3 to said layer 2; initiating said observation operation in said layer 2, while simultaneously again transmitting, from said layer 2 to said layer 1, a confirmation information transmission for said layer-3-data based on said layer-3-data retransmitted from said layer 3; and terminating said observation operation in said layer 2 when said confirmation information transmission is successful, while simultaneously notifying transmission success to said layer 3.
Claim 9
Dependent Claim
30 words
A data retransmission method used in confirmation information transmissions according to claim 5, wherein said notification of transmission failure from said layer 2 to said layer 3 uses a primitive.
Claim 10
Dependent Claim
30 words
A data retransmission method used in confirmation information transmissions according to claim 5, wherein said notification of transmission success from said layer 2 to said layer 3 uses a primitive.
Claim 11
Dependent Claim
23 words
A data retransmission method used in confirmation information transmissions according to claim 5, wherein said observation operation is conducted using a timer observation.
Claim 12
Dependent Claim
41 words
A data retransmission method used in confirmation information transmissions according to claim 5, wherein said layer 3 data is retransmitted from said layer 2 to said layer 1 using a retransmission function regulated by Digital Automobile Systems Standards Standard RCR STD-27D.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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