WO1997027719A1 - Process for dealing with overloads in atm networks - Google Patents

Process for dealing with overloads in atm networks Download PDF

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Publication number
WO1997027719A1
WO1997027719A1 PCT/DE1997/000101 DE9700101W WO9727719A1 WO 1997027719 A1 WO1997027719 A1 WO 1997027719A1 DE 9700101 W DE9700101 W DE 9700101W WO 9727719 A1 WO9727719 A1 WO 9727719A1
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WO
WIPO (PCT)
Prior art keywords
atm
data block
cell
atm cells
cells
Prior art date
Application number
PCT/DE1997/000101
Other languages
German (de)
French (fr)
Inventor
Stefan Schröder
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
Publication of WO1997027719A1 publication Critical patent/WO1997027719A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L12/5602—Bandwidth control in ATM Networks, e.g. leaky bucket
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5629—Admission control
    • H04L2012/5631—Resource management and allocation
    • H04L2012/5636—Monitoring or policing, e.g. compliance with allocated rate, corrective actions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5647—Cell loss

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • ATM asynchronous transfer mode
  • a cell consists of a cell header, in which connection information is stored, and an information part, in which the actual user information is stored.
  • the useful information is organized in data blocks. In order to be able to transmit this useful information to the receiving devices according to the ATM principle, these are taken from the data block and segmented into smaller units. The size of these units is chosen such that one unit can be transmitted in one ATM cell at a time.
  • the last ATM cell belonging to a data block is marked in the cell header in the transmission device.
  • the downstream data block is thus recognized by the downstream devices by evaluating the cell head of the ATM cells.
  • the ATM cells that lie between two of these markings can thus be interpreted by an ATM network element or a receiving device as belonging to a data block.
  • the transmission principles developed in this way are quite advantageous in practice and superior to other principles. Problems can arise here in overload situations. For this reason, if one of the devices involved in the transmission process has determined an overload condition in any way, ATM cells are simply discarded by not forwarding these cells to the receiving devices. However, there is the problem that only some of the ATM cells belonging to a data block are discarded, the remaining ATM cells reaching the receiving device in question. However, the receiving device can no longer reassemble the information present during the transmission process.
  • the ATM cell marked before the transmission process is evaluated in the relevant receiving devices in the prior art. With the aid of check procedures implemented here, it is then checked whether all ATM cells of a data block have been transmitted correctly. If this is not the case because e.g. in an ATM network element cells have been rejected because of the occurrence of an overload situation, the receiving device in question must request the data block again from the transmitting device. This ensures correct transmission, but the fact that the dynamics of the transmission process are not optimal proves problematic. The reason for this is that, for example, one of the first ATM cells of a data block has been rejected and the receiving device has to wait for the marked ATM cell in order to be able to carry out a correct evaluation. This means that a lot of time passes in practice.
  • the object of the invention is to show a way in which the transmission of information can be accelerated when overload situations occur.
  • An advantage of the invention is in particular that when overload situations occur in the relevant ATM network element, only one ATM cell of the data block is marked and transmitted to the receiving device in question. This has the advantage that the receiving devices are informed of a cell loss at an early stage and can request a new transmission of the respective data block. The transmission time of the relevant data blocks can then be drastically increased.
  • the criterion is the state of use of the ATM network. This has the advantage that the load state can be treated dynamically.
  • check procedures are provided in the receiving devices, which ensure that a loss of ATM cells that occurs during the transmission process is determined. This has the advantage that information which has been separated for transmission purposes can be put together again.
  • the marking is made in the cell head. Since the cell heads in particular are evaluated by the relevant devices, the marking information can be read quickly. According to claim 5, it is provided that the marking is designed as a data block end identifier. This has the advantage that the ATM cells can be assigned to a data block at any time during the transmission process.
  • FIG 1 shows an arrangement in which the invention
  • Figure 2 is a flow chart of the invention
  • FIG. 1 shows an ATM network via which information is transmitted using ATM cells in accordance with the asynchronous transfer mode.
  • the interconnected nodes of the network are designed as ATM network elements N.
  • the information is combined in a data block in the transmitting device S and is inserted into ATM cells before the transmission process.
  • the information originally contained in a data block is then transmitted to a receiving device E in a plurality of ATM cells via the ATM network elements N. There the information is extracted from the ATM cells. taken, and possibly put together again to form a data block.
  • the method according to the invention is shown in FIG.
  • the transmission should take place to only one receiving device E, but the transmission to several receiving devices in the sense of a point-to-more-point connection is also possible.
  • the transmission of only one data block is also to be addressed in the following, with the transmission of many data blocks naturally being carried out in practice.
  • Purpose are provided in the ATM network elements N procedures which immediately recognize overload conditions and, if necessary, initiate countermeasures. These can be designed, for example, in such a way that ATM cells are rejected.
  • an ATM cell is marked, for example in the cell header, and transmitted to the receiving device E hm in question.
  • Said marking in the cell header can take place, for example, using the bits reserved for the “payload type” and has the function of a data block end identifier.
  • the remaining ATM cells belonging to the data block are now discarded.
  • the receiving device E takes the ATM marked as a result of the overload situation Cell and recognizes on the basis of system-internal check procedures that the data block has not been completely transmitted. In the following, the receiving device E will now request the data block from the transmitting device S again directly.
  • the receiving device E no longer has to wait for the last marked ATM cell used in the prior art, used as data block identification, to initiate countermeasures and can thus react immediately.
  • the period of time that must be waited for in the prior art in order to obtain the data block identification is thus used for the transmission of data blocks. In practice, this is associated with a drastic increase in the transmission time.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

In the present state of the art, receivers have to await the reception of a data block end recognition signal in order to find theloss from ATM cells. As ATM cells are rejected in overload situations, the dynamics of the transmission process are adversely affected. Here the invention provides relief by marking an ATM cell immediatly after detecting the overload process and taking it to the receiver concerned, which takes counter-measures directly and does not, therefore, have to await the arrival of the data block end recognition signal.

Description

Beschreibungdescription
Verfahren zum Behandeln von Überlastsituationen in ATM-NetzenMethod for handling overload situations in ATM networks
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff deε Patentanspruchs 1.The invention relates to a method according to the preamble of claim 1.
In den nach einem asynchronen Transfermodus (ATM) operieren- den Netzen, kurz ATM-Netze genannt, werden Informationen in Zellen von einer Sendeeinrichtung zu einer oder mehreren Em¬ pfangseinrichtungen hin übertragen. Dabei besteht eine Zelle auε einem Zellenkopf, in dem Verbindungsinformationen ge¬ speichert sind, sowie aus einem Informationsteil, in dem die eigentlichen Nutzinformationen abgelegt sind. Vor dem Über¬ tragungsvorgang sind die Nutzinformationen in Datenblöcken organisiert. Um diese Nutzinformationen nun nach dem ATM- Prinzip zu den Empfangseinrichtungen hin übertragen zu kön¬ nen, werden diese dem Datenblock entnommen und in kleinere Einheiten segmentiert. Dabei wird die Größe dieser Einheiten derart gewählt, daß eine Einheit in jeweils einer ATM-Zelle übertragen werden kann.In the networks operating according to an asynchronous transfer mode (ATM), abbreviated to ATM networks, information is transmitted in cells from a transmitting device to one or more receiving devices. A cell consists of a cell header, in which connection information is stored, and an information part, in which the actual user information is stored. Before the transmission process, the useful information is organized in data blocks. In order to be able to transmit this useful information to the receiving devices according to the ATM principle, these are taken from the data block and segmented into smaller units. The size of these units is chosen such that one unit can be transmitted in one ATM cell at a time.
Um die zu einem Datenblock vor dem Sendevorgang ursprünglich zusammengefaßten Informationen später wieder zu einer Einheit zusammenfügen zu können, wird in der Sendevorrichtung die letzte, zu einem Datenblock zugehörige ATM-Zelle im Zellen¬ kopf markiert. Der ursprüngliche Datenblock wird somit von den nachgeschalteten Einrichtungen erkannt, indem der Zellen- köpf der ATM-Zellen ausgewertet wird. Die ATM-Zellen,die zwi¬ schen zwei dieser Markierungen liegen, können somit von einem ATM-Netzelement oder einer Empfangseinrichtung als zu einem Datenblock zugehörig interpretiert werden. Die derart ausgebildeten Übertragungsprinzipien sind in der Praxis durchaus vorteilhaft und anderen Prinzipien überlegen. In Überlastsituationen können aber hier Probleme auftreten. Aus dieεem Grund werden, falls von einer der am Ubertragungs- Vorgang beteiligten Einrichtungen ein wie auch immer zu defi¬ nierender Überlastzustand ermittelt worden ist, ATM-Zellen einfach verworfen, indem diese Zellen nicht zu den Empfangs¬ einrichtungen weitergeleitet werden. Dabei besteht aber daε Problem, daß lediglich einige der zu einem Datenblock zuge- hörigen ATM-Zellen verworfen werden, wobei die übrigen ATM- Zellen zu der in Frage kommenden Empfangseinrichtung ge¬ langen. Die Empfangseinrichtung kann damit aber nicht mehr die beim Sendevorgang vorliegenden Informationen wieder zu¬ sammensetzen.In order to be able to combine the information originally combined to form a data block prior to the transmission process into a unit again, the last ATM cell belonging to a data block is marked in the cell header in the transmission device. The downstream data block is thus recognized by the downstream devices by evaluating the cell head of the ATM cells. The ATM cells that lie between two of these markings can thus be interpreted by an ATM network element or a receiving device as belonging to a data block. The transmission principles developed in this way are quite advantageous in practice and superior to other principles. Problems can arise here in overload situations. For this reason, if one of the devices involved in the transmission process has determined an overload condition in any way, ATM cells are simply discarded by not forwarding these cells to the receiving devices. However, there is the problem that only some of the ATM cells belonging to a data block are discarded, the remaining ATM cells reaching the receiving device in question. However, the receiving device can no longer reassemble the information present during the transmission process.
Zur Behebung dieses Umstandes wird beim Stand der Technik die vor dem Sendevorgang markierte ATM-Zelle in den betreffenden Empfangseinrichtungen ausgewertet. Mit Hilfe von hier implem¬ entiertet Checkprozeduren wird dann überprüft, ob alle ATM- Zellen eines Datenblockes korrekt übertragen worden sind. Ist dies nicht der Fall, weil z.B. in einem ATM-Netzelement Zel¬ len wegen des Auftretens einer Überlastsituation verworfen worden sind, muß die betreffende Empfangseinrichtung den Da¬ tenblock erneut bei der Sendevorrichtung anfordern. Damit ist dann zwar eine korrekte Übertragung sichergestellt, problema¬ tisch hingegen erweist sich der Umstand, daß die Dynamik deε Übertragungsvorgangs nicht optimal ist. Dies hat seinen Grund darin,daß beispielsweise eine der ersten ATM-Zellen eines Da¬ tenblockes verworfen worden sind und die Empfangseinrichtung die markierte ATM-Zelle abwarten muß, um eine korrekte Be¬ wertung durchführen zu können. Damit verstreicht in der Pra¬ xis aber viel Zeit.In order to remedy this fact, the ATM cell marked before the transmission process is evaluated in the relevant receiving devices in the prior art. With the aid of check procedures implemented here, it is then checked whether all ATM cells of a data block have been transmitted correctly. If this is not the case because e.g. in an ATM network element cells have been rejected because of the occurrence of an overload situation, the receiving device in question must request the data block again from the transmitting device. This ensures correct transmission, but the fact that the dynamics of the transmission process are not optimal proves problematic. The reason for this is that, for example, one of the first ATM cells of a data block has been rejected and the receiving device has to wait for the marked ATM cell in order to be able to carry out a correct evaluation. This means that a lot of time passes in practice.
Der Erfindung liegt die Aufgabe zugrunde, einen Weg aufzuzei- gen, wie die Übertragung von Informationen beim Auftreten von Überlaεtsituationen beschleunigt werden kann. Die Erfindung wird, ausgehend vom Oberbegriff des Patentan¬ spruchs l, durch dessen kennzeichnende Merkmale gelöst.The object of the invention is to show a way in which the transmission of information can be accelerated when overload situations occur. Starting from the preamble of patent claim 1, the invention is solved by its characteristic features.
Vorteilhaft an der Erfindung ist insbesondere, daß beim Auf¬ treten von Überlastsituationen in dem betreffenden ATM-Netz¬ element lediglich noch eine ATM-Zelle des Datenblockes mar¬ kiert und zu der in Frage kommenden Empfangseinrichtung über¬ tragen wird. Damit ist der Vorteil verbunden, daß bereits frühzeitig die Empfangseinrichtungen von einem Zellenverlust in Kenntnis gesetzt werden und eine erneute Übertragung des jeweiligen Datenblockeε anfordern können. Damit kann dann die Übertragungszeit der betreffenden Datenblöcke drastisch er¬ höht werden.An advantage of the invention is in particular that when overload situations occur in the relevant ATM network element, only one ATM cell of the data block is marked and transmitted to the receiving device in question. This has the advantage that the receiving devices are informed of a cell loss at an early stage and can request a new transmission of the respective data block. The transmission time of the relevant data blocks can then be drastically increased.
Weitere Ausgestaltungen der Erfindung sind in den Unteran¬ sprüchen angegeben.Further refinements of the invention are specified in the subclaims.
Gemäß Anspruch 2 iεt vorgeεehen, daß das Kriterium der Aus- laεtungεzustand des ATM-Netzes ist. Damit ist der Vorteil verbunden, daß der Auslastungzustand dynamisch behandelbar ist.According to claim 2 it is provided that the criterion is the state of use of the ATM network. This has the advantage that the load state can be treated dynamically.
Gemäß Anspruch 3 ist vorgeεehen, daß Checkprozeduren in den Empfangseinrichtungen vorgesehen sind,die dafür Sorge tragen, daß ein während des Übertragungsvorganges aufgetretener Ver¬ lust von ATM-Zellen ermittelt wird. Damit ist der Vorteil verbunden, daß Informationen, die zu Übertragungszwecken se¬ pariert wurden, wieder zusammengefügt werden können.According to claim 3 it is provided that check procedures are provided in the receiving devices, which ensure that a loss of ATM cells that occurs during the transmission process is determined. This has the advantage that information which has been separated for transmission purposes can be put together again.
Gemäß Anεpruch 4 ist vorgesehen, daß die Markierung im Zel¬ lenkopf vorgenommen wird. Da insbesondere die Zellenköpfe von den betreffenden Einrichtungen ausgewertet werden, können die Markierungsinformationen schnell mitgelesen werden. Gemäß Anspruch 5 ist vorgesehen, daß die Markierung alε Da¬ tenblockendekennung ausgebildet ist. Damit ist der Vorteil verbunden, daß die ATM-Zellen jederzeit während des Übertra- gungεvorgangeε einem Datenblock zuordenbar εind.According to claim 4 it is provided that the marking is made in the cell head. Since the cell heads in particular are evaluated by the relevant devices, the marking information can be read quickly. According to claim 5, it is provided that the marking is designed as a data block end identifier. This has the advantage that the ATM cells can be assigned to a data block at any time during the transmission process.
Gemäß Anspruch 6 iεt vorgesehen, daß falls in der in Frage kommenden Empfangseinrichtung bei Erhalt der in dem betref¬ fenden ATM-Netzelement markierten ATM-Zelle der Verlust wei¬ terer, einem Datenblock zugehöriger ATM-Zellen ermittelt wird, unmittelbar eine erneute Übertragung des Datenblocks bei der Sendeeinrichtung angefordert wird. Damit ist der Vor¬ teil verbunden, daß die Übertragung der Informationen weiter beschleunigt werden kann.According to claim 6 it is provided that if the loss of further ATM cells belonging to a data block is determined in the receiving device in question when the ATM cell marked in the relevant ATM network element is received, the data block is retransmitted immediately is requested from the transmitter. This has the advantage that the transmission of the information can be further accelerated.
Die Erfindung wird im folgenden anhand eines Ausführungsbei- spielε näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment.
Eε zeigen:Eε show:
Figur 1 eine Anordnung, bei der das erfindungsgemäßeFigure 1 shows an arrangement in which the invention
Verfahren angewandt ist und Figur 2 ein Flußdiagramm des erfindungsgemäßenMethod is applied and Figure 2 is a flow chart of the invention
Verfahrenmethod
Figur l zeigt ein ATM-Netz, über das Informationen nach dem asynchronen Transfermodus mittels ATM-Zellen übertragen wer¬ den. Die untereinander verbundenen Knoten des Netzeε sind als ATM-Netzelemente N ausgebildet. Die Informationen sind in der Sendeeinrichtung S in einem Datenblock zusammengefaßt und werden vor dem UbertragungsVorgang in ATM-Zellen eingefügt. Die ursprünglich in einem Datenblock enthaltenen Informationen werden dann in einer Mehrzahl von ATM-Zellen über die ATM-Netzelemente N zu einer Empfangseinrichtung E übertragen. Dort werden die Informationen den ATM-Zellen ent- nommen, und gegebenenfalls wieder zu einem Datenblock zusam¬ mengesetzt.FIG. 1 shows an ATM network via which information is transmitted using ATM cells in accordance with the asynchronous transfer mode. The interconnected nodes of the network are designed as ATM network elements N. The information is combined in a data block in the transmitting device S and is inserted into ATM cells before the transmission process. The information originally contained in a data block is then transmitted to a receiving device E in a plurality of ATM cells via the ATM network elements N. There the information is extracted from the ATM cells. taken, and possibly put together again to form a data block.
In Figur 2 ist daε erfindungsgemäße Verfahren aufgezeigt. In vorliegendem Ausführungεbeiεpiel soll davon ausgegangen wer¬ den, daß die Übertragung zu lediglich einer Empfangsein¬ richtung E hin erfolgen soll, die Übertragung zu mehreren Em¬ pfangseinrichtungen im Sinne einer Punkt-zu-mehr-Punkt-Ver- bindung iεt allerdings auch möglich. Weiterhin soll im fol- genden auch die Übertragung lediglich eines Datenblockeε an- geεprochen werden, wobei in der Praxis selbstverεtändlich die Übertragung vieler Datenblocke durchgeführt wird.The method according to the invention is shown in FIG. In the present exemplary embodiment, it should be assumed that the transmission should take place to only one receiving device E, but the transmission to several receiving devices in the sense of a point-to-more-point connection is also possible. Furthermore, the transmission of only one data block is also to be addressed in the following, with the transmission of many data blocks naturally being carried out in practice.
Weiterhin soll davon ausgegangen werden, daß in einem ATM- Netzelement N eine Uberlastsituation auftritt. Zu diesemFurthermore, it should be assumed that an overload situation occurs in an ATM network element N. To this
Zweck sind m den ATM-Netzelementen N Prozeduren vorgesehen, die Uberlastzustände sofort erkennen und gegebenfalls Gegen¬ maßnahmen einleiten. Diese können beispielsweise derart aus¬ gebildet sein, daß ATM-Zellen verworfen werden.Purpose are provided in the ATM network elements N procedures which immediately recognize overload conditions and, if necessary, initiate countermeasures. These can be designed, for example, in such a way that ATM cells are rejected.
Erfindungsgemäß wird nun bei Erkennen eines Überlastzustandes von einem Netzelement N eine ATM-Zelle markiert, und zwar beispielweise im Zellenkopf, und zu der in Frage kommenden Empfangseinrichtung E hm übertragen. Die genannte Markierung im Zellenkopf kann beispielsweise unter Verwendung der für den „Payload Type" reservierten Bits erfolgen und hat die Funktion einer Datenblockendekennung. Die restlichen dem Da¬ tenblock zugehörigen ATM-Zellen werden nun verworfen. Die Empfangseinrichtung E nimmt die infolge der Überlastsituation markierte ATM-Zelle entgegen und erkennt aufgrund systemin¬ terner Checkprozeduren, daß der Datenblock nicht vollständig übertragen wurde Im folgenden wird nun von der Empfangsein¬ richtung E der Datenblock von der Sendeeinrichtung S unmit¬ telbar erneut angefordert . Mit dieser Vorgehensweise muß die Empfangseinrichtung E die beim Stand der Technik benutzte, alε Datenblockendekennung verwendete letzte markierte ATM-Zelle zum Einleiten von Ge¬ genmaßnahmen nicht mehr abwarten und kann somit unmittelbar reagieren. Damit wird die Zeitspanne, die beim Stand der Technik abgewartet werden muß, um die Datenblockendekennung zu erhalten, zur Übertragung von Datenblöcken genutzt. Damit ist dann in der Praxis eine drastische Erhöhung der Über- tragungεzeit verbunden. According to the invention, when an overload state is identified by an network element N, an ATM cell is marked, for example in the cell header, and transmitted to the receiving device E hm in question. Said marking in the cell header can take place, for example, using the bits reserved for the “payload type” and has the function of a data block end identifier. The remaining ATM cells belonging to the data block are now discarded. The receiving device E takes the ATM marked as a result of the overload situation Cell and recognizes on the basis of system-internal check procedures that the data block has not been completely transmitted. In the following, the receiving device E will now request the data block from the transmitting device S again directly. With this procedure, the receiving device E no longer has to wait for the last marked ATM cell used in the prior art, used as data block identification, to initiate countermeasures and can thus react immediately. The period of time that must be waited for in the prior art in order to obtain the data block identification is thus used for the transmission of data blocks. In practice, this is associated with a drastic increase in the transmission time.

Claims

Patentansprüche claims
1. Verfahren zum Behandeln von Überlastεituationen in ATM- Netzen mit einer Mehrzahl von ATM-Netzelementen (N) , die un¬ tereinander verbunden sind und über die, auεgehend von einer Sendeeinrichtung (S) , in einem Datenblock zusammengefaßte In¬ formationen in einer Mehrzahl von ATM-Zellen zu wenigstenε einer Empfangεeinrichtung (E) hin übertragen werden, wobei das Ende des jeweiligen Datenblockes mit einer Markierung versehen ist und wobei die ATM-Netzelemente (N) nach Maßgabe eines Kriteriums ATM-Zellen verwerfen, dadurch gekennzeichnet , daß im Falle des Erfülltseinε deε Kriteriumε von dem jeweili- gen ATM-Netzelement (N) lediglich noch eine, zu dem Daten¬ block gehörende ATM-Zelle markiert und zu der wenigstens ei¬ nen Empfangseinrichtung (E) übertragen wird und daß die die¬ ser ATM-Zelle nachfolgenden demselben Datenblock zugehörigen ATM-Zellen verworfen werden.1. Method for handling overload situations in ATM networks with a plurality of ATM network elements (N) which are connected to one another and via which, starting from a transmitting device (S), a plurality of information summarized in a data block are transmitted from ATM cells to at least one receiving device (E), the end of the respective data block being provided with a marking and the ATM network elements (N) rejecting ATM cells in accordance with a criterion, characterized in that in the case If the criterion is met by the respective ATM network element (N), only one ATM cell belonging to the data block is marked and transmitted to the at least one receiving device (E) and that this ATM Cell subsequent ATM cells belonging to the same data block are discarded.
2. Verfahren nach Anεpruch 1, dadurch gekennzeichnet , daß daε Kriterium der Auslastungszustand des ATM-Netzes iεt.2. The method according to claim 1, characterized in that the criterion is the utilization state of the ATM network.
3. Verfahren nach Anεpruch 1 oder 2, dadurch gekennzei chnet , daß Checkprozeduren in den Empfangεeinrichtungen (E) vorge- sehen sind, die dafür Sorge tragen, daß ein während des Über¬ tragungsvorganges aufgetretener Verlust von ATM-Zellen er¬ mittelt wird. 3. Method according to claim 1 or 2, characterized in that check procedures are provided in the receiving devices (E) which ensure that a loss of ATM cells that occurs during the transmission process is determined.
4. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet , daß die Markierung im Zellenkopf der in Frage kommenden ATM- Zelle vorgenommen wird.4. The method according to any one of the preceding claims, characterized in that the marking is made in the cell header of the ATM cell in question.
5. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet , daß die Markierung alε Datenblockendekennung ausgebildet ist5. The method according to any one of the preceding claims, characterized in that the marking is designed as a data block end identifier
6. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß, falls in der in Frage kommende Empfangseinrichtung (E) bei Erhalt der in dem jeweiligen ATM-Netzelement (N) mar¬ kierten ATM-Zelle der Verlust weiterer, einem Datenblock zu¬ gehöriger ATM-Zellen ermittelt wird, unmittelbar eine erneute Übertragung des Datenblocks bei der Sendeeinrichtung (S) an¬ gefordert wird. 6. The method according to any one of the preceding claims, characterized in that if in the receiving device in question (E) upon receipt of the ATM cell marked in the respective ATM network element (N) the loss of further one data block zu¬ associated ATM cells is determined, a new transmission of the data block is immediately requested from the transmitting device (S).
PCT/DE1997/000101 1996-01-23 1997-01-22 Process for dealing with overloads in atm networks WO1997027719A1 (en)

Applications Claiming Priority (2)

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DE1996102337 DE19602337A1 (en) 1996-01-23 1996-01-23 Method for handling overload situations in ATM networks
DE19602337.8 1996-01-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9677285B2 (en) 2000-03-31 2017-06-13 Pergo (Europe) Ab Building panels

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481505A2 (en) * 1990-10-19 1992-04-22 Fujitsu Limited A supervision control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59108304D1 (en) * 1991-08-27 1996-11-28 Siemens Ag Arrangement for bit rate monitoring in ATM networks

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481505A2 (en) * 1990-10-19 1992-04-22 Fujitsu Limited A supervision control system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ARMITAGE G J ET AL: "PACKET REASSEMBLY DURING CELL LOSS. NETWORK TRANSMISSION OF DATAGRAMS BY THE ATM ADAPATION LAYER CAN PRODUCE LOST CELLS, RESULTING IN INCORRECT OR ABORTED DATAGRAM REASSEMBLY", IEEE NETWORK: THE MAGAZINE OF COMPUTER COMMUNICATIONS, vol. 7, no. 5, September 1993 (1993-09-01), pages 26 - 34, XP000615027 *
JAIME BAE KIM ET AL: "INTERNATIONAL STANDARDIZATION OF B-ISDN", COMPUTER NETWORKS AND ISDN SYSTEMS, vol. 27, no. 1, October 1994 (1994-10-01), pages 5 - 27, XP000468894 *
KAMAL A E: "A PERFORMANCE STUDY OF SELECTIVE CELL DISCARDING USING THE END-OF-PACKET INDICATOR IN AAL TYPE 5", PROCEEDINGS OF INFOCOM '95 - CONFERENCE ON COMPUTER COMMUNICATIONS, FOURTEENTH ANNUAL JOINT CONFERENCE OF THE IEEE COMPUTER AND COMMUNICATIONS SOCIETIES, BOSTON APR. 2 - 6, 1995, vol. 3, 2 April 1995 (1995-04-02), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1264 - 1272, XP000580549 *
MAKRUCKI B A: "ON THE PERFORMANCE OF SUBMITTING EXCESS TRAFFIC TO ATM NETWORKS", COUNTDOWN TO THE NEW MILENNIUM, PHOENIX, DEC. 2 - 5, 1991, vol. 1 OF 3, 2 December 1991 (1991-12-02), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 281 - 288, XP000325986 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9677285B2 (en) 2000-03-31 2017-06-13 Pergo (Europe) Ab Building panels

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