Patent US5210535A successfully refreshed from Google Patents.
US5210535A
Expired / Lapsed
US
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O S I data communication for dealing with abstract syntaxes which are and are not preliminarily negotiated
Assignee: NEC Corp
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Filing: 1991-02-14
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Granted: 1993-05-11
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Expires: 2011-02-14
Abstract
Abstract Being operable as a presentation layer defined by the International Standard ISO 7498, each data communication system comprises (A) a syntax transforming unit and (B) an abstract syntax storing unit besides (a) an application program unit for producing and receiving abstract syntaxes descriptive of data according to the International Standard ISO 8824 and (b) a sending and receiving unit for sending and receiving trasfer syntaxes to and from at least one counterpart system. Before carrying out data transfer, negotiation is had in the known manner to decide a set of abstract syntaxes, which can be used in the data transfer and are herein called negotiated syntaxes and encoded by the transforming unit into primary transfer syntaxes as herein called with these transfer syntaxes accompanied by first information. The application program unit may produce different syntaxes which are the abstract syntaxes other than the negotiated syntaxes. Even in this event, the transforming unit encodes the different syntaxes into what are herein called secondary transfer syntaxes with these transfer syntaxes accompanied by second information. When supplied with each secondary transfer syntax and the second information from the counterpart system, the storing unit stores the second information in the transforming unit. This enables the transforming unit to refer to the second information like usual reference to the first information and to decode the secondary transfer syntax in question into a reproduction of one of the different syntaxes that is used in the counterpart system.
Inventors
- 👤 Tomoo Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/40; H04L69/00; H04L69/06; H04L69/24; Y; Y10; Y10S; Y10S370/00; Y10S370/901; Y10S370/902; Y10S370/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
A method of carrying out data communication between presentation layers defined by open systems interconnection standardized by the International Organization for Standardization, said method being for use in each of said presentation layers and including the steps of: producing abstract syntaxes; negotiating between each of said presentation layers and a different one of said presentation layers to decide a set of abstract syntaxes as negotiated syntaxes; encoding said negotiated syntaxes into primary transfer syntaxes with said primary transfer syntaxes accompanied by first information indicative of said negotiated syntaxes; sending said primary transfer syntaxes to said different one of said presentation layers together with said first information; storing in a memory said first information as memorized information; said encoding step being for encoding, with reference to said memorized information, different syntaxes into secondary transfer syntaxes with said secondary transfer syntaxes accompanied by second information indicative of said different syntaxes, said different syntaxes being included in said abstract syntaxes besides said negotiated syntaxes; and said sending step being for additionally sending said secondary transfer syntaxes to said different one of the presentation layers together with said second information.
Claim 2
Independent Claim
186 words
A method of carrying out data communication between presentation layers defined by open systems interconnection standardized by the International Organization for Standardization, said method being for use in each of said presentation layers and including the steps of: producing abstract syntaxes; negotiating between each of said presentation layers and a different one of said presentation layers to decide a set of abstract syntaxes as negotiated syntaxes; encoding said negotiated syntaxes into primary transfer syntaxes with said primary transfer syntaxes accompanied by first information indicative of said negotiated syntaxes; sending said primary transfer syntaxes to said different one of said presentation layers together with said first information; storing in a memory said first information as memorized information; said encoding step being for encoding, with reference to said memorized information, different syntaxes into secondary transfer syntaxes with said secondary transfer syntaxes accompanied by second information indicative of said different syntaxes, said different syntaxes being included in said abstract syntaxes besides said negotiated syntaxes; and said sending step being for additionally sending said secondary transfer syntaxes to said different one of the presentation layers together with said second information.
Claim 3
Dependent Claim
148 words
A method as claimed in claim 1, said method further including the steps of: receiving said primary transfer syntaxes and said first information from said different one of said presentation layers as primary received syntaxes and first received information and decoding said primary received syntaxes into primary decoded syntaxes with reference to said first received information, said primary decoded syntaxes being reproductions of said negotiated syntaxes used in said different one of said presentation layers, wherein: said receiving step is for additionally receiving said secondary transfer syntaxes and the second information from said different one of said presentation layers as secondary received syntaxes and second received information; said decoding step being for additionally decoding said secondary received syntaxes into secondary decoded syntaxes with reference to said second received information, said secondary decoded syntaxes being reproductions of said different syntaxes used in said different one of said presentation layers.
Claim 4
Dependent Claim
25 words
A method as claimed in claim 2, wherein said memorizing step is for additionally storing said second received information in addition to said memorized information.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 1, wherein said sending step is for sending a mark before only the second information preceding each of said secondary transfer syntaxes.
Claim 6
Dependent Claim
109 words
A data communication system which is operable according to open systems interconnection standardized by the International Organization for Standardization as a presentation layer and includes an application program unit and sending and receiving means for sending and receiving data as transfer syntaxes through a communication line and which comprises: syntax transforming means for carrying out transforms between syntaxes descriptive of said data and said transfer syntaxes; and abstract syntax storing means connected to said sending and receiving means and said syntax transforming means for storing in said syntax transforming means said abstract syntaxes which are produced for sending to said communication line and are received through said communication line.
Claim 7
Dependent Claim
109 words
A data communication system which is operable according to open systems interconnection standardized by the International Organization for Standardization as a presentation layer and includes an application program unit and sending and receiving means for sending and receiving data as transfer syntaxes through a communication line and which comprises: syntax transforming means for carrying out transforms between syntaxes descriptive of said data and said transfer syntaxes; and abstract syntax storing means connected to said sending and receiving means and said syntax transforming means for storing in said syntax transforming means said abstract syntaxes which are produced for sending to said communication line and are received through said communication line.
References Cited (Backward Citations)
US4994998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |