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WO2000077970A1 - Procede et dispositif pour la transmission selective de messages - Google Patents

Procede et dispositif pour la transmission selective de messages Download PDF

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Publication number
WO2000077970A1
WO2000077970A1 PCT/EP2000/004354 EP0004354W WO0077970A1 WO 2000077970 A1 WO2000077970 A1 WO 2000077970A1 EP 0004354 W EP0004354 W EP 0004354W WO 0077970 A1 WO0077970 A1 WO 0077970A1
Authority
WO
WIPO (PCT)
Prior art keywords
messages
protocol
message
transmission link
special
Prior art date
Application number
PCT/EP2000/004354
Other languages
German (de)
English (en)
Inventor
Klaus David Gradischnig
Hanns Jürgen SCHWARZBAUER
Michael TÜXEN
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP00940244A priority Critical patent/EP1186133A1/fr
Publication of WO2000077970A1 publication Critical patent/WO2000077970A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1809—Selective-repeat protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements

Definitions

  • a message path that has a transmission protocol with secure message transmission is used to send several independent message streams, i.e. Transmit messages for different recipients or for different, mutually independent activities of a recipient, with a user of the message link, e.g. a certain class of a higher protocol layer is to be understood.
  • the present invention shows how existing protocols using the so-called “multiple-selective retransmission” method (MSR) - and in particular SSCOP
  • SSCOP can be easily expanded to deliver messages "out-of-sequence". This means that another protocol level can then be assigned to its users (applications), i.e. easily provide higher-level protocols with streams that cannot block each other.
  • SSCOP / SSCF considered here based on the protocol stack in FIG. 2, it is advantageous to split the problem of secured, sequence-accurate message transmission into mutually independent streams into two partial problems and to solve one partial problem in SSCOP and the other in SSCF.
  • this decomposition is not mandatory and is not necessarily advantageous even if the protocol to be modified does not already have a layer structure.
  • Another advantage is that less memory has to be kept for receive buffers, since the data of such
  • a certain marking (marking) (such marking should not be confused with the marking of the sequence numbers of the messages already delivered, which were stored in the receive buffer), can be used in the messages made, or such messages are recognizable by their content.
  • An example of the latter are messages which belong to SCCP class 0 (see Q.714) and which are identified by the value 0 in the protocol class parameter field of the SCCP message and for which applications (users of the SCCP) have an (essentially) reliable one but no delivery in the correct order is required.
  • the sending device can in principle label messages for immediate delivery without the receiving device of the protocol necessarily having to observe this labeling, ie the receiving device continues to deliver all messages completely and in the correct order to the next higher protocol level.
  • a transmitter device using this identification can communicate correctly with a receiving device, even if the latter ignores this identification because, for example, it does not understand it .
  • the users of the protocol modified in this way assume delivery in strict order of all messages (such as the protocols described in Q.2210 and Q.2140 for the so-called "retrieval" when using Q.2110). It must then be weighed whether the present invention should not be used or whether the functions of the user protocols which are based on delivery in strict order are modified or restricted.
  • Q.2140 would have to be modified such that on an AAL-RETRIEVE_BSNT request by Q.2210, the modified Q.2140 returns an AAL-BSNT confir to Q.2210, in where the value of the BSNT parameter contained therein is equal to the highest value of the SN value obtained in AA-DATA-Indication.
  • messages with a lower sequence number than said SN value are sent which have not yet been received or may not yet have been received from the SSCF were delivered to the user.
  • a second stage functions are introduced which make it possible to control a large number of different message streams in such a way that messages from one stream are delivered in the correct order, but message losses on other streams do not delay the delivery of messages from one stream.
  • these functions are not introduced as part of the SSCOP or other existing and extended protocols according to the first stage, but rather in a separate protocol layer, which can be referred to as a convergence or multiplexing layer, although it is also incorporated directly into the existing and already modified protocols is possible.
  • an existing convergence layer can be expanded (e.g. the SSCF for the NNI described in Q.2140) or a new convergence layer can be introduced.
  • the data sent over the transmission link there are two Markings necessary. One is an identification of the data stream, the other a numbering of the messages within a data stream. Possibly. control messages must still be defined to control (eg initialize) the individual data streams.
  • the identification of the message stream shows an advantage of arranging the function in a separate protocol layer.
  • message stream identifications that are already contained in the data of the users can be used, which makes the introduction of a separate protocol field unnecessary and thus saves transmission capacity.
  • This also means that there is no need to change the interface between the transmission protocol and its (existing) users. For example, this is possible with MTP Level 3 (Q.2210, Q.704), which - depending on the ITU-T or ANSI version - identifies between 16 and 256 explicit protocol streams via the so-called signaling route selection field (SLS).
  • SLS signaling route selection field
  • origin and / or destination addresses or parts thereof can be used in order to achieve a finer division of the messages into individual, independent streams.
  • the layer Q.2140 lying between Q.2210 (broadband MTP level 3) and Q.2110 (SSCOP) could therefore be modified accordingly without this having any effect on Q.2210.
  • the message streams can also be explicitly identified using a new protocol field, which means that
  • Initialized protocol e.g. SSCOP
  • the convergence layer (or the additional function built into the protocol) has the following functions:
  • the present invention is not limited to MSR methods. It can also be applied to ordinary selective rejects or go-back-n processes. In these cases, however, there are more adjustments, e.g. Introduction of a reception buffer or a status bar to track the messages that have already been delivered, required than with the MSR procedure.
  • SSCOP (Q.2110) is modified such that a free bit is used in SD-PDUs to identify messages which do not have to be delivered “in-sequence” (see FIG. 1).
  • Q.2140 is also modified to introduce 17 streams, one for SCCP class 0 messages and 16 for the 16 possible SLS values of other messages (see Figures 4, 5 and 6).
  • the maximum permitted message length for the SSCOP (parameter k) increased to 4100 octets, since the modified SSCF (for the fields SQ #, St # and Status) requires an additional 4 octets per message (SD-PDU with MTP-3b data) space (see Figure 3).

Landscapes

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

Abstract

Il arrive fréquemment que plusieurs flux de messages indépendants les uns des autres (par ex. des messages destinés à plusieurs destinataires) soient transmis sur une ligne de transmission qui présente un protocole de transmission de messages sécurisée. Cependant, ce protocole de transmission ne pouvant souvent pas distinguer les flux de messages, il arrive que la distribution des messages d'un flux soit retardée parce qu'un message précédent d'un autre flux de messages a été perdu et doit être retransmis. L'invention permet de résoudre ce problème.
PCT/EP2000/004354 1999-06-15 2000-05-15 Procede et dispositif pour la transmission selective de messages WO2000077970A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00940244A EP1186133A1 (fr) 1999-06-15 2000-05-15 Procede et dispositif pour la transmission selective de messages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19927289 1999-06-15
DE19927289.1 1999-06-15

Publications (1)

Publication Number Publication Date
WO2000077970A1 true WO2000077970A1 (fr) 2000-12-21

Family

ID=7911319

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/004354 WO2000077970A1 (fr) 1999-06-15 2000-05-15 Procede et dispositif pour la transmission selective de messages

Country Status (2)

Country Link
EP (1) EP1186133A1 (fr)
WO (1) WO2000077970A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802651A2 (fr) * 1996-04-15 1997-10-22 Robert Bosch Gmbh Méthode de multiplexage faisant preuve de robustesse contre les erreurs avec retransmission éventuelle
US5684791A (en) * 1995-11-07 1997-11-04 Nec Usa, Inc. Data link control protocols for wireless ATM access channels
EP0996249A1 (fr) * 1998-10-19 2000-04-26 Mitsubishi Electric Information Technology Centre Europe B.V. Protocole de demande automatique de retransmission avec répétition sélective sur circuits virtuels
EP1006689A2 (fr) * 1998-11-30 2000-06-07 Matsushita Electric Industries Co., Ltd. Commande de retransmission de paquets utilisant des informations prioritaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684791A (en) * 1995-11-07 1997-11-04 Nec Usa, Inc. Data link control protocols for wireless ATM access channels
EP0802651A2 (fr) * 1996-04-15 1997-10-22 Robert Bosch Gmbh Méthode de multiplexage faisant preuve de robustesse contre les erreurs avec retransmission éventuelle
EP0996249A1 (fr) * 1998-10-19 2000-04-26 Mitsubishi Electric Information Technology Centre Europe B.V. Protocole de demande automatique de retransmission avec répétition sélective sur circuits virtuels
EP1006689A2 (fr) * 1998-11-30 2000-06-07 Matsushita Electric Industries Co., Ltd. Commande de retransmission de paquets utilisant des informations prioritaires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GRADISCHNIG K D: "TRENDS OF SIGNALLING PROTOCOL EVOLUTION IN ATM NETWORKS", PROCEEDINGS OF THE INTERNATIONAL SWITCHING SYMPOSIUM,DE,BERLIN, VDE VERLAG, vol. SYMP. 15, 23 April 1995 (1995-04-23), pages 310 - 314, XP000495673, ISBN: 3-8007-2093-0 *

Also Published As

Publication number Publication date
EP1186133A1 (fr) 2002-03-13

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