CA2014407A1 - Apparatus and method for efficiently coupling digital signals to a communications medium in information packets - Google Patents

Apparatus and method for efficiently coupling digital signals to a communications medium in information packets

Info

Publication number
CA2014407A1
CA2014407A1 CA2014407A CA2014407A CA2014407A1 CA 2014407 A1 CA2014407 A1 CA 2014407A1 CA 2014407 A CA2014407 A CA 2014407A CA 2014407 A CA2014407 A CA 2014407A CA 2014407 A1 CA2014407 A1 CA 2014407A1
Authority
CA
Canada
Prior art keywords
pad
characters
packets
forwarded
mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2014407A
Other languages
French (fr)
Other versions
CA2014407C (en
Inventor
John Davis Price
Ralph E. Richardson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2014407A1 publication Critical patent/CA2014407A1/en
Application granted granted Critical
Publication of CA2014407C publication Critical patent/CA2014407C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0471—Terminal access circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/28—Timers or timing mechanisms used in protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/214—Phase shifted impulses; Clock signals; Timing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/216—Code signals; Framing (not synchronizing)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/296—Packet switching

Abstract

An improved Packet Assembler/Disassembler (PAD) optimizes the assembling of characters into packets for transmission over a packet network. The PAD is arranged to operably connect to and receive character asynchronous data from one or more terminal instruments operating in either a block transfer mode or an echoplexing mode. Characters received by the PAD from a terminal instrument operating in an echoplexing mode are forwarded with no PAD delay.
Characters received by the PAD from a terminal instrument operating in a block transfer mode are similarly forwarded with no PAD delay and in full packets withthe exception of the last few characters of each block of characters which only partially fill their respective packets. And these partially filled packets are quickly forwarded in a time period which just exceeds the period required for the reception of a single character at the rate of data reception from the terminal instrument.
CA002014407A 1989-05-01 1990-04-11 Apparatus and method for efficiently coupling digital signals to a communications medium in information packets Expired - Lifetime CA2014407C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/345,912 US5056088A (en) 1989-05-01 1989-05-01 Apparatus and method for efficiently coupling digital signals to a communications medium in information packets
US345,912 1989-05-01

Publications (2)

Publication Number Publication Date
CA2014407A1 true CA2014407A1 (en) 1990-11-01
CA2014407C CA2014407C (en) 1996-11-12

Family

ID=23357065

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002014407A Expired - Lifetime CA2014407C (en) 1989-05-01 1990-04-11 Apparatus and method for efficiently coupling digital signals to a communications medium in information packets

Country Status (7)

Country Link
US (1) US5056088A (en)
EP (1) EP0396309B1 (en)
JP (1) JP2588488B2 (en)
KR (1) KR0149860B1 (en)
CA (1) CA2014407C (en)
DE (1) DE69022278T2 (en)
HK (1) HK78296A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274762A (en) * 1989-12-15 1993-12-28 Ncr Corporation Method for high speed data transfer
JPH03214841A (en) * 1990-01-19 1991-09-20 Fujitsu Ltd Modem pool system dependent upon packet communication procedure
JPH0828756B2 (en) * 1990-04-17 1996-03-21 ヤマハ株式会社 Data transfer method
JP2556923B2 (en) * 1990-05-10 1996-11-27 三菱電機株式会社 Packet data amount control method, packet transmission method, and data transmission device
JPH0490645A (en) * 1990-08-03 1992-03-24 Mitsubishi Electric Corp Voice packet assembly/diassembly equipment
FR2674650A1 (en) * 1991-03-29 1992-10-02 Albertin Pierre Process for constructing a fault-tolerant X 25 packet switch which can be expanded in service and has parallel MIMD processors
US5463623A (en) * 1991-07-31 1995-10-31 At&T Ipm Corp. Integrated wireless telecommunication and local area network system
JP3037476B2 (en) * 1991-08-28 2000-04-24 富士通株式会社 ATM cell assembly / disassembly method
US5384770A (en) * 1992-05-08 1995-01-24 Hayes Microcomputer Products, Inc. Packet assembler
US5631935A (en) * 1993-05-06 1997-05-20 Run-Rad Unlimited Networking, Ltd. Method and apparatus for governing information transfer using an efficient transport protocol
WO1995026089A1 (en) * 1994-03-18 1995-09-28 Research In Motion Limited Method and apparatus for maximizing the transmission of data in a wireless data communication network
US5553075A (en) * 1994-06-22 1996-09-03 Ericsson Ge Mobile Communications Inc. Packet data protocol for wireless communication
US5450411A (en) * 1994-09-02 1995-09-12 At&T Global Information Solutions Company Network interface for multiplexing and demultiplexing isochronous and bursty data streams in ATM networks
KR100418848B1 (en) * 1994-12-09 2004-07-27 브렌트 타운젠드 High speed decoder and decoding method
US5970103A (en) * 1996-09-06 1999-10-19 Townshend; Brent High speed communications system for analog subscriber connections
US5574858A (en) * 1995-08-11 1996-11-12 Dell U.S.A., L.P. Method and apparatus for, upon receipt of data from a mouse, requiring the remainder of data needed to constitute a packet to be received within one second
KR100251712B1 (en) * 1997-07-11 2000-04-15 윤종용 X.25 network interfacing apparatus for x.25 protocol communication in electronic switching system
JP3319367B2 (en) * 1997-10-14 2002-08-26 ケイディーディーアイ株式会社 Network connection device
US6256323B1 (en) * 1997-12-08 2001-07-03 Cisco Technology, Inc. Method and apparatus for efficiently transporting asynchronous characters over an ATM network
US6477143B1 (en) 1998-01-25 2002-11-05 Dror Ginossar Method and apparatus for packet network congestion avoidance and control
US7319860B2 (en) * 2002-11-07 2008-01-15 Research In Motion Limited Pseudo-interactive input processing in wireless environments

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU591057B2 (en) * 1984-06-01 1989-11-30 Digital Equipment Corporation Local area network for digital data processing system
US4737950A (en) * 1985-05-31 1988-04-12 Rockwell International Corp. Multifunction bus to user device interface circuit
GB8526620D0 (en) * 1985-10-29 1985-12-04 British Telecomm Communications network
JPS6354844A (en) * 1986-08-26 1988-03-09 Nec Corp Code independent type packet forming system for semi-duplex communication
FR2616025B1 (en) * 1987-05-26 1989-07-21 Lespagnol Albert METHOD AND SYSTEM FOR PACKET FLOW CONTROL
US4893306A (en) * 1987-11-10 1990-01-09 Bell Communications Research, Inc. Method and apparatus for multiplexing circuit and packet traffic

Also Published As

Publication number Publication date
US5056088A (en) 1991-10-08
KR900019424A (en) 1990-12-24
JP2588488B2 (en) 1997-03-05
EP0396309B1 (en) 1995-09-13
CA2014407C (en) 1996-11-12
EP0396309A2 (en) 1990-11-07
JPH02305041A (en) 1990-12-18
HK78296A (en) 1996-05-10
DE69022278D1 (en) 1995-10-19
DE69022278T2 (en) 1996-05-15
EP0396309A3 (en) 1992-12-23
KR0149860B1 (en) 1999-05-15

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