EP1104617A2 - Procede pour commander la transmission de donnees dans un systeme de transmission de donnees v.24 sans fil exploite entre un terminal et un dispositif de transmission de donnees exploite pour la telecommunication de donnees - Google Patents

Procede pour commander la transmission de donnees dans un systeme de transmission de donnees v.24 sans fil exploite entre un terminal et un dispositif de transmission de donnees exploite pour la telecommunication de donnees

Info

Publication number
EP1104617A2
EP1104617A2 EP99952275A EP99952275A EP1104617A2 EP 1104617 A2 EP1104617 A2 EP 1104617A2 EP 99952275 A EP99952275 A EP 99952275A EP 99952275 A EP99952275 A EP 99952275A EP 1104617 A2 EP1104617 A2 EP 1104617A2
Authority
EP
European Patent Office
Prior art keywords
data transmission
data
transmission device
dee
handshake
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.)
Withdrawn
Application number
EP99952275A
Other languages
German (de)
English (en)
Inventor
Rolf Biedermann
Klaus MÜHLE
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1104617A2 publication Critical patent/EP1104617A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04L69/30—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
    • H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]

Definitions

  • Data telecommunications is the mutual sending and receiving of data or data signals (packet data) between a data terminal - e.g. Personal computers, data terminals, data processing systems etc. - and a remote data terminal device - e.g. Personal computers, data terminals, DV systems etc. - via a telecommunications network, for example a public telecommunications network (Stw.: ISDN, PSTN etc.).
  • a network technology device the so-called data transmission device, is provided between the data terminal device and the telecommunication network.
  • the most widespread data transmission device besides the PC card is the modem (artificial word from modulator / demodulator) [cf. i.a. the utility model DE 297 14 588 Ul].
  • the modem is an electrical data transmission device based on the carrier current method for use on analog transmission paths with limited bandwidth - eg telecommunication lines (eg a / b line pair, ISDN S 0 bus etc.) of the telecommunication network, the digital data signals converted and transmitted in analog data signals and vice versa.
  • telecommunication lines eg a / b line pair, ISDN S 0 bus etc.
  • a large number of V-series methods standardized by the International Telecommunication Union - Telecommunication Standards (ITU-T) are also implemented or implemented in modems.
  • FIGURE 1 shows a data telecommunications scenario based on a V.24 data transmission system.
  • a V.24 The data transmission system is a public telecommunications network with a remote V, for example a PSTN (Public Switched Telecommunication Network) with an a / b line pair, or an ISDN with an ISDN S c bus (Integrated Services Digital Network) .24 data transmission system connected.
  • the V.24 data transmission system has a data terminal device DEE, for example a personal computer, and a data transmission device DUE, for example a modem, which are connected to one another via a V.24 cable (V.24 interface) K v m.
  • the remote V.24 data transmission system has a e.g. Remote data terminal DEE designed as a personal computer and a e.g. Remote data transmission device DUE designed as a modem, which are likewise connected to one another via a V.24 cable (V.24 interface) K.
  • DEE Remote data terminal
  • DUE Remote data transmission device
  • the data terminal device DEE, DEE contains a system control SST with user interface BOF, an application software ASW and a driver TR as an adapter between software (application software) and hardware (data transmission device or modem).
  • the driver TR is specific to the modem manufacturer and preferably as a CAPI driver (Common ISDN Application Programmable Interface; standardized communication interface to the user software for fault-tolerant ISDN telecommunication with the personal computer) or as a TAPI driver (Telephone Application Programmable) Interface) trained.
  • CAPI driver Common ISDN Application Programmable Interface; standardized communication interface to the user software for fault-tolerant ISDN telecommunication with the personal computer
  • TAPI driver Telephone Application Programmable
  • HAYES command set A large number of the data transmission devices DUE available on the market, for example analog modems and PC-external ISDN terminal adapters, are controlled via a HAYES command set (HAYES standard).
  • HAYES standard is originally an American industry standard for modem communication, especially for modem control by the data DEE. It is also called the AT standard because almost all commands in the HAYES command set begin with the prefix "AT” (ATtention) with the ASCII characters A and T.
  • the standard which has meanwhile been introduced worldwide, is the subject of an ITU recommendation (International Telecommunications Union) with the designation "ITU-T V.25ter”. Instead of the prefix "AT”, the prefix "at”, the prefix "A /" or the prefix "a /" can be used.
  • V.24 March 1993, pages 1 to 19, the V.24 cable or the V.24 interface K, ._ supports the modem operation to a personal computer through different lines (status lines). These are: 1. a transmit data line TxD for data transmission, 2. a receive data line RxD for data transmission,
  • RTS line Ready To Send
  • RTS for the transmission type "hardware handshake” for transmitting the state "READY TO SEND” (state "RTS)
  • DTR line (DATA TERMINAL READY) DTR, on which the personal computer reports to the modem that it is switched on and is ready to establish connections
  • DCD line (DATA CHANNEL DETECTION) DCD, on which the modem reports to the personal computer that it has established or established the connection to a remote modem
  • this 7-pin cable can still support modem operation on the personal computer. Zen. This is done in that instead of the "hardware handshake" on the RTS / CTS lines, a transmission type "software handshake” for transmitting the states "RTS", "CTS” - for example by means of an XON / XOFF protocol - to the transmission - / Receive data lines TxD, RxD is carried out.
  • a transmission type "software handshake” for transmitting the states "RTS", "CTS" - for example by means of an XON / XOFF protocol - to the transmission - / Receive data lines TxD, RxD is carried out.
  • the data stream transmitted between the data terminal device DEE and the data transmission device DUE is analyzed in the data terminal device DEE and the data transmission device DUE, all "software handshake characters" are interpreted and measures are taken accordingly.
  • the corded V.24 data transmission system shown in FIG. 1 has the disadvantage for an application scenario in which the data terminal device DEE and the data transmission device DUE are spatially separated, for example over several meters, that firstly for data telecommunications em With regard to the spatial arrangement of the data terminal device DEE and the data transmission device DUE, a correspondingly long V.24 cable K v 24 is required and that secondly, a great amount of non-negligible effort is required to install the cable for the installation of the system with such cable lengths.
  • FIGURE 2 shows such a cordless starting from FIGURE 1
  • V.24 data transmission system for data telecommunications.
  • the remote V.24 data transmission system which is not shown completely in FIGURE 2, can either be corded according to FIGURE 1 or, like the cordless V.24 data transmission system in FIGURE 2, can be cordless.
  • the V.24 cable or the V.24 interface are compared to the corded V.24 data transmission system in FIGURE 1. place K v 2 separated between the data terminal device DEE and the data transmission device DUE and each connected to the two ends of the cable caused by the separation em data transmission device.
  • the two data transmission devices em connected to the data terminal DEE by the V.24 cable or the V.24 interface K v _, the first data transmission device DUG1 and em to the data transmission device DUE by the V.24 cable or the V. 24-interface K connected second data transmission device DUG2, are connected to each other by an air interface LSS for wireless telecommunications.
  • Air interfaces are wireless telecommunication interfaces in which messages are transmitted wirelessly on the basis of various message transmission methods FDMA (Frequency Division Multiple Access), TDMA (via a remote transmission link between a message source (eg first data transmission device DUG1) and a message sink (eg second data transmission device DUG2). Time Division Multiple Access) and / or CDMA (Code Division Multiple Access) - eg according to radio standards such as DECT [Digital Enhanced (formerly: European) Cordless Telecommunication; see. Telecommunications Electronics 42 (1992) Jan. / Feh. No. 1, Berlin, DE; U. Pilger "Structure of the DECT standard", pages 23 to 29 m in connection with the ETSI publication ETS 300175-1 ...
  • DECT Digital Enhanced (formerly: European) Cordless Telecommunication
  • GSM Groupe Speciale Mobile or Global System for Mobile Communication; see Informatik Spektrum 14 (1991) Jum, No. 3, Berlin, DE; A.Mann: "The GSM standard - basis for digital European mobil f unknetze ", pages 137 to 152 m in connection with the publication telekom praxis 4/1993, P.Smolka” GSM radio interface - elements and functions ", pages 17 to 24], UMTS [cf. Funkscnau 6/98: R. Sietmann "Wrestling for the UMTS interface", pages 76 to 81] WACS or PACS, IS-54, IS-95, PHS, PPC etc. [see IEEE Communications Magazine, January 1995, pages 50 to 57; DD Falconer et al: “Time Division Multiple Access Methods for Wireless Personal Communications”].
  • the DECT air interface is preferably provided as the air interface LSS.
  • DECT technology is according to the publication "Lecture by A. Elberse, M. Barry, G. Fl eming on the subject:” DECT Da ta Services - DECT in Fixed and Mobile e Networks ", June 1st / 18th, 1996 , Hotel Sofi tel, Paris; pages 1 to 12 and summary "is - based on the publication” Nachrich tentechnik Electronics 42 (1 992)
  • DECT network access technology users can both become their own network operator with regard to the remote transmission of user data and also have access to a higher-level telecommunications network.
  • the object on which the invention is based is to control the transmission of the states "RTS", "CTS" in a cordless V.24 data transmission system operated between a data terminal device and a data transmission device for data telecommunication in such a way that for different types of state transmission ( Hardware handshake or software handshake) a reliable mutual announcement of the state in the cordless V.24 data transmission system takes place.
  • V.24 data transmission system em operated between the data terminal device (eg a personal computer) and a data transmission device (eg a modem) for data telecommunication with the data terminal device via em V.24 -Connected first data transmission device and a second data transmission device connected to the data transmission device via a V.24 cable, which in turn can be connected by wireless telecommunication via an air interface, a) in "hardware handshake mode" for transmitting the states "RTS", "CTS”, in which status lines RTS, CTS are used, each go into a local processing mode, with which the respective V.24 data transmission device relates to the
  • the respective V.24 data transmission device if the input buffer m overflows with the respective V.24 data transmission device with data arriving in the device, can communicate this state to the opposite side connected via the V.24 cable and consequently can temporarily interrupt the further flow of data. This would not be possible if the RTS / CTS status lines were "looped through" via the air interface or the software handshake characters were transmitted via the air interface.
  • FIGURE 3 shows the cordless V.24 data transmission system according to FIGURE 2, in which the data transmission is controlled as follows:
  • the cordless V.24 data transmission system When the cordless V.24 data transmission system is started up or when the data terminal device DDE, the data transmission device DUE and the V.24 data transmission devices DUG1, DUG2 are switched on, the V.24 data transmission devices DUG1, DUG2, the data terminal device DEE and the data transmission device DUE is operated in a command data transmission mode, m the command data KD between the data terminal device DEE and the data transmission device DUE via the V.24 cable K v _. and the air interface LSS are transmitted.
  • the command data KD transmitted in the command data transmission mode can e.g. contain first command data KD1, which indicate that between the data terminal device DEE and the data transmission device DUE em "So tware handshake" for transmitting the states "RTS", "CTS" - e.g. using the XON / XOFF protocol - m a data stream is to be carried out on the data lines TxD, RxD, or e.g. second
  • Contain command data which indicate that between the data terminal device DEE and the data transmission device DUE em "hardware handshake" to transmit the states "RTS", "CTS" on the status lines RTS, CTS should be carried out.
  • the "software handshake” or the "hardware handshake” is also possible for the "software handshake” or the "hardware handshake” to be preferably preconfigured manually .
  • the transmission type is preconfigured and therefore the first command data KD1 or the second command data KD2 are transmitted between the data terminal device DEE and the data transmission device DUE, the first V.24 data transmission device DUGl preferably detects the transmission type to be set and transmits it to the second V.24 data transmission device DUG2.
  • the second V.24 data transmission device DUG2 recognizes the type of transmission to be set and transmits it to the first V.24 data transmission device DUG1 or
  • the first V.24 data transmission device DUG1 and the second V.24 data transmission device DUG2 recognize the type of transmission to be set.
  • the first V.24 data transmission device DUGl when it has recognized or received the second command data KD2, goes into a first special mode SM1 assigned to the "hardware handshake", in which the first V.24 data transmission device DUGl relates to the Status lines RTS, CTS treat the "RTS", "CTS” states transmitted locally on these lines between the data terminal DEE and the first V.24 data transmission device DUG1.
  • Local means that the states "RTS", “CTS” on the status lines RTS, CTS are not transmitted via the air interface LSS or the status lines RTS, CTS are not "looped through” via the air interface LSS.
  • the information on the other lines or status lines of the V.24 cable K is transmitted via the air interface LSS or these lines are "looped through” via the air interface LSS.
  • the first V.24 data transmission device DUGl when it has recognized or received the first command data KD1, m a second special mode SM2 assigned to the "software handshake", m with which the first V.24 data transmission device DUGl m relates to the between the data terminal device DEE and the first V.24 data transmission device DUG1, the data stream transmitted on the data lines TxD, RxD deals with the states "RTS", "CTS" transmitted in this data stream locally. Local means that the states "RTS", "CTS" or the software handshake characters are not transmitted via the air interface LSS.
  • the second V.24 data transmission device DUG1 when it has recognized or received the second command data KD2, m m a third special mode SM3 assigned to the "hardware handshake", m which the second V.24 data transmission device DUG2 m relates to on the status lines RTS, CTS, the states "RTS", "CTS” locally on these lines between the data transmission device DUE and the second V.24 data transmission device DUG2 are renamed. Local means that the states "RTS", "CTS" on the status lines RTS, CTS are not transmitted via the air interface LSS. In contrast to this, the information on the other lines or status lines of the V.24 cable K v > n is transmitted via the air interface LSS.
  • the second V.24 data transmission device DUG2 m m When it has recognized or received the first command data KD1, the second V.24 data transmission device DUG2 m m a fourth special mode SM4 assigned to the "software handshake", in which the second V.24 data transmission device DUG2 m on the data stream transmitted between the data transmission device DUE and the second V.24 data transmission device DUG2 on the data lines TxD, RxD, the states transmitted in this data stream
  • RTS Remote means that the States “RTS”, “CTS” or the software handshake characters cannot be transmitted via the LSS air interface.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)

Abstract

Selon l'invention, dans un système de transmission de données V.24 sans fil exploité entre un terminal et un dispositif de transmission de données pour la télécommunication de données, pour commander la transmission des états 'RTS' (Ready To Send) et 'CTS' (Clear To Send) de telle sorte qu'une annonce mutuelle fiable de l'état se fasse dans le système de transmission de données V.24 sansfil, de façon simple, pour différents types de transmission d'état (Hardware-Handshake ou Software-Handshake), un premier appareil de transmission de données relié au terminal par l'intermédiaire d'un câble V.24 et un second appareil de transmission de données relié également au dispositif de transmission de données par l'intermédiaire d'un câble V.24 sont exploités aussi bien en mode 'Hardware-Handshake' qu'en mode 'Software-Handshake', chaque foisen mode de traitement local, ces deux appareils de transmission de données pouvant être reliés à leur tour par télécommunication sans fil, par l'intermédiaire d'une interface radio.
EP99952275A 1998-08-12 1999-08-04 Procede pour commander la transmission de donnees dans un systeme de transmission de donnees v.24 sans fil exploite entre un terminal et un dispositif de transmission de donnees exploite pour la telecommunication de donnees Withdrawn EP1104617A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19836574 1998-08-12
DE19836574A DE19836574A1 (de) 1998-08-12 1998-08-12 Verfahren zum Steuern der Datenübertragung in einem schnurlosen zwischen einer Datenendeinrichtung und einer Datenübertragungseinrichtung zur Daten-Telekommunikation betriebenen V.24-Datenübertragungssystem
PCT/DE1999/002417 WO2000010290A2 (fr) 1998-08-12 1999-08-04 Procede pour commander la transmission de donnees dans un systeme de transmission de donnees v.24 sans fil exploite entre un terminal et un dispositif de transmission de donnees exploite pour la telecommunication de donnees

Publications (1)

Publication Number Publication Date
EP1104617A2 true EP1104617A2 (fr) 2001-06-06

Family

ID=7877323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99952275A Withdrawn EP1104617A2 (fr) 1998-08-12 1999-08-04 Procede pour commander la transmission de donnees dans un systeme de transmission de donnees v.24 sans fil exploite entre un terminal et un dispositif de transmission de donnees exploite pour la telecommunication de donnees

Country Status (7)

Country Link
EP (1) EP1104617A2 (fr)
CN (1) CN1315106A (fr)
AU (1) AU6460699A (fr)
CA (1) CA2340011A1 (fr)
DE (1) DE19836574A1 (fr)
HK (1) HK1040862A1 (fr)
WO (1) WO2000010290A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142538A (en) * 1990-04-19 1992-08-25 Photonics Corporation Link protocol for rs 232 communications
FI104870B (fi) * 1994-12-12 2000-04-14 Nokia Mobile Phones Ltd Tiedonsiirtomenetelmä
GB9608717D0 (en) * 1996-04-26 1996-07-03 Maxon Systems Inc London Limit Terminal concentrator
GB9621252D0 (en) * 1996-10-11 1996-11-27 Nokia Mobile Phones Ltd Dect/gsm interworking

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0010290A2 *

Also Published As

Publication number Publication date
WO2000010290A3 (fr) 2000-09-21
HK1040862A1 (zh) 2002-06-21
CA2340011A1 (fr) 2000-02-24
WO2000010290A2 (fr) 2000-02-24
AU6460699A (en) 2000-03-06
CN1315106A (zh) 2001-09-26
DE19836574A1 (de) 2000-02-17

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