Patent EP0147677A2 successfully refreshed from Google Patents.
EP0147677A2
Expired / Lapsed
EP
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Method of coding to minimize delay at a communication node
Assignee: International Business Machines Corp
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Filing: 1984-12-04
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Granted: —
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Expires: 2004-12-04
Abstract
Abstract A method of coding control blocks for packet communication wherein the code for control information is restricted to a smaller subset having the property that subfields within the block can be recognized and perhaps decoded without the remainder of the encoded block having been received.
Inventors
- 👤 Albert X. Widmer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:57
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4906; H04L12/00; H04L12/28; H04L12/42; H04L12/427; H04L12/433
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A method of coding, comprising: dividing unconstrained, unencoded data into blocks having an equal number N of bits; encoding each block into a coded block having a number M of bits where M is greater than N according to a set of code; characterized by, encoding control information into a coded block having a number M of bits according to a subset of said set of code, said subset having fewer members than said set and having at least one sub-field smaller than the field of said set which is decoded independently of the remaining portion of said field.
Claim 2
Independent Claim
99 words
A method of coding, comprising: dividing unconstrained, unencoded data into blocks having an equal number N of bits; encoding each block into a coded block having a number M of bits where M is greater than N according to a set of code; characterized by, encoding control information into a coded block having a number M of bits according to a subset of said set of code, said subset having fewer members than said set and having at least one sub-field smaller than the field of said set which is decoded independently of the remaining portion of said field.
Claim 3
Dependent Claim
23 words
A method of coding as claimed in claim 1, wherein: said control information comprises at least one indicator describable within one said sub-field.
Claim 4
Dependent Claim
36 words
A method of coding as claimed in claim 2, wherein each bit of said decoded sub-field is determined separately by a corresponding bit of said encoded sub-filed and a determination that said subfield is being decoded.
Claim 5
Dependent Claim
21 words
A method of coding as claimed in claim 3 wherein an encoded indicator consists of two complementary bits within said sub-field.
Claim 6
Dependent Claim
58 words
A method of coding as claimed in claim 3 wherein: said set of code is a DC balanced 88/IOB code divided into 5B/6B and 3B/4B coding sub-blocks: and said subset consists of encoded sub-blocks, each composed of equal numbers of ones and zeroes and wherein each encoded sub-block consists of the corresponding unencoded sub-block and one additional bit.
Claim 7
Dependent Claim
21 words
A method of coding as claimed in claim 5, wherein an encoded indicator consists of two complementary bits within said sub-block.
Claim 8
Dependent Claim
78 words
A method of coding and data communication as claimed in claim 1, further comprising the steps of: transmitting said encoded block of control information in a packet; transmitting said encoded block of blocks of data said packet, following said control information; receiving said sub-field; comparing said sub-field to a reference value before a remaining portion of the block in which said sub-field is located is received; retransmitting said encoded block or blocks without decoding dependent upon said comparison.
Claim 9
Dependent Claim
70 words
A method of communication, as claimed in claim 1 or 7, further comprising the steps of : transmitting data at a maximally efficient rate, said rate being a signal rate; controlling said data transmission with a controller in accordance with control information within control fields, at least some of which are critical; and transmitting said critical control fields at said signal rate but with lower informational content than said data.
Claim 10
Dependent Claim
49 words
A method of communication as claimed in claim 8, further comprising: anticipating the reception of a predetermined first sequence within said critical control fields; preparing a predetermined second sequence for transmission upon the reception of said first sequence; and transmitting said second sequence upon reception of said first sequence.
References Cited (Backward Citations)
No citation records indexed.
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