Patent US5764919A successfully refreshed from Google Patents.
US5764919A
Expired / Lapsed
US
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Data transmission method and system therefor
Assignee: Honda Motor Co Ltd
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Filing: 1995-05-31
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Granted: 1998-06-09
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Expires: 2015-05-31
Abstract
Abstract A data transmission system for a vehicle includes a plurality of control systems installed on the vehicle, and a network bus connecting the plurality of control systems with each other for circulating a transmission right through the plurality of control systems to thereby perform transmission of a message between the plurality of control systems. According to a first aspect, each of the control systems starts transmitting data when it is detected that the transmission right is not generated or lost from the system, and continues transmitting the data when no collision of data transmitted from the present control system with data transmitted from the rest of the plurality of control systems, or when by mediation for avoiding the collision is detected, it is determined to continue data transmission. According to another aspect, the maximum number of times of retransmission to be permitted is determined according to a type of failure in transmission identified, and the retransmission is performed so long as the number times of retransmission of the data does not exceed the maximum number of times of retransmission to be permitted. According to still another aspect, the message comprises a first response field for receiving a first acknowledging response output from a control system having received the transmission right, and a second response field for receiving a second acknowledging response output from a control system having received data.
Inventors
- 👤 Hiroshi Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0061; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315; H04L1/0001; H04L1/12; H04L1/16; H04L1/1607; H04L1/1657; H04L1/1664; H04L1/1671; H04L1/1685; H04L1/18; H04L1/1825; H04L1/1867; H04L1/189; H04L12/00; H04L12/28; H04L12/40; H04L12/40006; H04L12/40013; H04L12/407; H04L12/413; H04L12/4135; H04L12/417; H04L67/00; H04L67/01; H04L67/12; H04L2001/0092; H04L2001/0094; H04L2001/0098; H04L2012/40267; H04L2012/40273
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A data transmission method comprising: connecting a plurality of control systems installed on a vehicle by at least one common signal line, and transmitting a message between said plurality of control systems over said at least one common signal line while circulating a transmission right through said plurality of control systems, wherein said message comprises a first response field for receiving a first acknowledging response output from one of said plurality of control systems which has received said transmission right, and a second response field for receiving a second acknowledging response output from one of said plurality of control systems which has received data.
Claim 2
Dependent Claim
104 words
A data transmission method comprising: connecting a plurality of control systems installed on a vehicle by at least one common signal line, and transmitting a message between said plurality of control systems over said at least one common signal line while circulating a transmission right through said plurality of control systems, wherein said message comprises a first response field for receiving a first acknowledging response output from one of said plurality of control systems which has received said transmission right, and a second response field for receiving a second acknowledging response output from one of said plurality of control systems which has received data.
Claim 3
Dependent Claim
33 words
A data transmission method according to claim 1, wherein a processing corresponding to said first acknowledging response is performed in preference to a processing corresponding to an absence of said second acknowledging response.
Claim 4
Dependent Claim
55 words
A data transmission method according to claim 2, wherein: said processing corresponding to said first acknowledging response comprises one of waiting for a next reception of said transmission right and a continuation of transfer of said transmission right, and said processing corresponding to said absence of said second acknowledging response comprises retransmission of said data.
Claim 5
Dependent Claim
199 words
A data transmission method comprising: connecting a plurality of control systems installed on a vehicle by at least one common signal line, and transmitting a message between said plurality of control systems over said at least one common signal line while circulating a transmission right through said plurality of control systems, wherein said message comprises a first message having a first response field for receiving a first acknowledging response output from one of said plurality of control systems which has received said transmission right, and a second message having a second response field for receiving a second acknowledging response output from one of said plurality of control systems which has received data, wherein if said first acknowledging response is detected after said second message is sent, each of said plurality of control systems judges that transfer of said transmission right is completed irrespective of whether or not said second acknowledging response is detected, so that retransmission of said second message is not performed until said transmission right is next acquired, and wherein if said first acknowledging response is not detected, each of said plurality of control systems sends out said first message to continue transfer of said transmission right.
Claim 6
Dependent Claim
199 words
A data transmission method comprising: connecting a plurality of control systems installed on a vehicle by at least one common signal line, and transmitting a message between said plurality of control systems over said at least one common signal line while circulating a transmission right through said plurality of control systems, wherein said message comprises a first message having a first response field for receiving a first acknowledging response output from one of said plurality of control systems which has received said transmission right, and a second message having a second response field for receiving a second acknowledging response output from one of said plurality of control systems which has received data, wherein if said first acknowledging response is detected after said second message is sent, each of said plurality of control systems judges that transfer of said transmission right is completed irrespective of whether or not said second acknowledging response is detected, so that retransmission of said second message is not performed until said transmission right is next acquired, and wherein if said first acknowledging response is not detected, each of said plurality of control systems sends out said first message to continue transfer of said transmission right.
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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) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |