WO2001003375A1 - Procede et ensemble de communication pour l'adaptation de ressources techniques de transmission entre un dispositif de communication central et plusieurs dispositifs de communication decentralises - Google Patents

Procede et ensemble de communication pour l'adaptation de ressources techniques de transmission entre un dispositif de communication central et plusieurs dispositifs de communication decentralises Download PDF

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Publication number
WO2001003375A1
WO2001003375A1 PCT/DE2000/002132 DE0002132W WO0103375A1 WO 2001003375 A1 WO2001003375 A1 WO 2001003375A1 DE 0002132 W DE0002132 W DE 0002132W WO 0103375 A1 WO0103375 A1 WO 0103375A1
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WO
WIPO (PCT)
Prior art keywords
atm
transmission
onu1
vubr
vvbrrt
Prior art date
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PCT/DE2000/002132
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German (de)
English (en)
Inventor
Georg Hein
Josef FRÖHLER
Original Assignee
Siemens Aktiengesellschaft
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Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP00954298A priority Critical patent/EP1190529A1/fr
Priority to AU66826/00A priority patent/AU6682600A/en
Publication of WO2001003375A1 publication Critical patent/WO2001003375A1/fr

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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
    • 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
    • H04Q11/0478—Provisions for broadband connections
    • 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
    • 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
    • H04L2012/5678—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management
    • H04L2012/5679—Arbitration or scheduling

Definitions

  • V out and communication arrangement for adapting tragungsÜ about ⁇ resources between a central and a plurality of decentralized communication devices.
  • the subscriber access network can be configured, for example, according to a point-to-multipoint configuration as a passive optical network - also referred to as a PON - with the aid of glass fibers.
  • a passive optical network no active optical or electrical components - such as amplifiers or multiplexers - are required, and no power supply is required within these networks.
  • Passive optical splitters - also known as "splitters” or “combiners” - can be used to reach the subscribers connected to them from a central point. At the end points of the glass fibers there are special active devices for terminating the optical fibers
  • optical line termination hereinafter also referred to as an optical network control unit - and at a decentralized location further optical network units "ONU” - also referred to below as optical network termination units - are provided.
  • the information is transmitted via the passive optical network either direction-separated with the help of two glass fibers, or via a single glass fiber as part of an wavelength division multiplex process.
  • Passive optical networks are known to the person skilled in the art through the ITU specification ITU-T G.983.
  • the access of the network terminating units or to the Netzab ⁇ schlu ß units connected communication terminal over the shared transmission medium to the higher-level ATM communication network is controlled by an access algorithm, which is usually supply speeds at high Studentstra ⁇ and ⁇ Senen at a plurality of Schlos Communication terminals is implemented using hardware.
  • an access algorithm which is usually supply speeds at high Studentstra ⁇ and ⁇ Senen at a plurality of Schlos Communication terminals is implemented using hardware.
  • a network termination unit requesting communication network resources is granted access authorization or access to the shared transmission medium.
  • subordinate communication networks - eg local networks or LANs - can also be connected to the higher-level ATM communication network via the shared communication network.
  • a network control unit which is arranged centrally in the subscriber access network and is connected to each network termination unit, realizes a timer or counter for each network termination unit, which is started as part of the connection setups derived from the network termination units, a timer then expires or the counter then reaches a predetermined value Value as soon as a new data packet or a specially reserved memory area is filled with user data in an affected network termination unit and temporarily stored in a buffer memory also implemented in the network termination unit for data transmission t arranged Counters, or the dimensioning of the time until a timer expires, is dependent on the data transmission rates that are defined or reserved during the connection setup.
  • a signaling signal indicating the expiry of a timer represents a network termination unit ⁇ individual request for a transmission authorization or access to the shared transmission medium, which sequentially takes place in a memory implemented in the network control unit and shared by all network termination units connected to the network control unit - eg FIFO memory - is saved.
  • the stored access requests are read from this and transmitted as actual transmission authorization to the connected network termination units or communication terminals, as a result of which access to the shared transmission medium is granted.
  • two timers can run at the same time, ie two simultaneous access requests would have to be saved and controlled. However, since two simultaneous accesses are not possible, one of the two access requests is delayed until the current access of the other access request has been completed. This delay is referred to as "cell delay variation". If several timers expire at the same time, the value of the "cell delay variation" is increased accordingly.
  • ATM traffic types defined by the ATM forum - also known as ATM service classes or service offerings - are known, by means of which data connections or high-bit-rate data transmissions with different requirements for, for example, transmission bandwidth and delay times are supported , or be provided.
  • voice images and data can be made using a type of cell within the framework of ATM connections each having a guaranteed transmission quality and / or transmission properties. len multiplexing are transmitted over the same subscriber lines.
  • ATM service classes - are mentioned as examples:
  • CBR Constant Bit Rate
  • VBRrt Variable Bit Rate - real rime
  • VBRnrt Variable Bit Rate - non real time
  • GFR Garanteed Frame Rate
  • UBR Unspecified Bit Rate
  • ABR Absolute Bit Rate
  • ATM traffic parameters - traffic parameter - and the service quality - which represent the quality and / or the transmission properties of the ATM connections - and the quality of service - for the desired ATM traffic type Quality-of-service parameters or QoS parameters referred to - negotiated and specified in a so-called transport contract.
  • ATM traffic parameters are "Peak Cell Rate, PCR”, “Sustainable Cell Rate, SCR” and “Minimum Cell Rate, MCR”.
  • QoS parameters are "Cell Delay Variation, CDV”, “Cell Transfer Delay, CTV", and "Cell Loss Ratio, CLR”.
  • the ATM service classes CBR and VBR are particularly suitable for applications with high QoS requirements, such as multimedia services or video conference circuits with high quality image transmission.
  • Constant Bit Rate CBR enables data transmission with a constant transmission speed and constant, very short delay times, the required bandwidth being characterized by the specification of a peak cell rate - “PCR” - which is provided during the entire duration of the connection got to.
  • PCR peak cell rate
  • VBRrt Real-Time
  • VBRnrt non-real-time requirements
  • a minimum transmission rate is agreed for connections based on the ATM service class ABR, but the best possible transmission speed is always used, if possible.
  • the ATM service class UBR represents a quality of service in which, in contrast to CBR and VBR, no fixed bandwidth is reserved and no cell loss rate CLR is specified. No demands are made on the connection for a ÜBR connection to be set up or desired, and thus no transmission quota is guaranteed by the communication network.
  • Transfer Performance "describes the division of the QOS classes defined by the ATM Forum into a permanent class (Class 1) and non-stringent classes (Class 2, Class 3, U-Class).
  • the object of the invention is to achieve effective use of the transmission technology resources provided by the transmission medium in the case of a plurality of connections, in particular ATM connections, which are conducted via a shared transmission medium, for example a passive optical network PON.
  • the task is based on a method and a communication arrangement according to the features of the preamble of claims 1 and 19 solved by their characterizing features.
  • the central communication device allocates one transmission-technical partial resource to the decentralized communication devices depending on the quality and / or the transmission properties of at least one connection made via the respective transmission-technical partial resource .
  • the essential aspect of the method according to the invention is that the transmission-technical partial resources allocated to the decentralized communication devices are at least partially reduced and the quality and / or the transmission properties of the at least one connection conducted via the respective reduced transmission-technical partial resource is determined.
  • the scope of the reduced, transmission-related sub-resource allocated to a decentralized communication device is modified or retained.
  • the main advantage of the method according to the invention is that the flexible adaptation of the transmission technology resources provided by a jointly used transmission medium achieves an increased traffic throughput via the transmission medium and an effective use of the transmission technology resources of the jointly used transmission medium.
  • the “burst behavior” in, for example, “passive optical networks” is improved by the at least temporary allocation of reserved but currently unused transmission capacities of the transmission medium.
  • the at least one connection routed via the allocated, transmission-related partial resource is implemented in accordance with the asynchronous transfer mode ATM, the ATM connection being in accordance with a standardized ATM service class that specifies the quality and the transmission properties of the ATM connection is designed.
  • the information to be transmitted in the context of an ATM connection is temporarily stored in at least one queue in each decentralized communication device.
  • the current queue fill level, the at least one queue, is recorded and then the quality and the transmission properties of the respective ATM connections are determined by evaluating the result of the registration.
  • the allocated, transmission-related partial resource is modified. Claim 4.
  • the queues or ATMs arranged in the decentralized communication devices can advantageously Cell buffers are dimensioned to be less extensive and the delay times of ATM cells when the decentralized communication devices are run through are also reduced.
  • the method according to the invention is particularly suitable in accordance with the asynchronous transfer mode ATM designed communication networks, particularly simple and therefore economically feasible.
  • the waiting ⁇ snakes filling levels of the queues depending on the ATM service class detected the respective ATM connections and reviewed - claim 6.
  • each ATM service class is an ATM Service class-individual sum of the queue fill levels of the corresponding queues is formed, the ATM service class individual queue total fill level information being weighted as a function of the ATM service classes.
  • the quality and the transmission properties of the ATM connections of an ATM service class are determined by evaluating the weighted, individual queue total fill level information specific to the ATM service class and, depending on the quality and the transmission characteristics, that of the decentralized communications.
  • This advantageous ATM service class-specific evaluation of the quality and the transmission properties of ATM connections of an ATM service class achieves an optimal allocation of the transmission technical sub-resources of a shared transmission medium and in particular in communication networks designed according to the asynchronous transfer mode ATM achieve an optimal, ie effective use of the "upstream PON transport quality" taking into account compliance with the ATM quality features maybe.
  • Show 1 shows a large number of communication terminals, which are connected to a higher-level communication network via a transmission medium that is shared and configured as a "passive optical network", and
  • FIG. 2 shows an exemplary scenario of ATM connections currently routed via an optical network termination unit connected to the “passive optical network” and correspondingly arranged connection-specific queues, which are read out as a function of the transmission sub-resource allocated to an optical network termination unit for information transmission.
  • FIG. 1 shows a block diagram of a subscriber access network ACCESS, via which a large number of communication terminals KE1.. Z assigned to each subscriber are connected to a higher-level communication network OKN.
  • the subscriber access network ACCESS is designed as a passive optical network PON in a point-to-multipoint configuration.
  • a central component of the passive optical network PON is an optical network control unit OLT, which is connected, for example, via an optical fiber LWL to predetermined transmission resources vr of the higher-level communication network OKN.
  • the higher-level communication network OKN is designed according to the asynchronous transfer mode ATM, the predetermined resources vr of the higher-level ATM communication network OKN comprising a data transmission rate of, for example, 155 Mbit / s.
  • the optical network control unit OLT three optical network termination units ONU1 ... 3 are connected via several glass fibers and via a passive optical splitter - also called “splitter” or “combiner”, whereby the three optical network termination units ONU1 ... 3 and the shared transmission medium "passive optical network” PON is completed by the optical network control unit OLT.
  • the three optical network termination units ONU1 ... 3 are the total ⁇ z communication terminals KE1 ... Z is connected, wherein an access from each communication terminal KE1 ...
  • the Z can be carried out in the 'vr predetermined resources of the ATM communication network OKN.
  • the request for resources can be done, for example, administratively in the context of network management or in the context of packet-oriented transmission protocols - for example TCP / IP - by transmitting a corresponding connection establishment message from a communication device KE1 ... Z to the corresponding optical network termination unit ONU1 ... 3 respectively.
  • a corresponding, protocol-based connection setup to the optical network control unit OLT and from this to the higher-level, ATM-oriented communication network OKN is then initiated by the respective optical network termination unit ONU1 ... 3.
  • corresponding ATM connections are then assigned to the respective optical network termination unit ONU1 ... 3 or the respective communication terminal KE1 ... Z.
  • ATM service classes are defined by the ATM forum, each ATM connection belonging to an ATM service class being specified by certain ATM traffic parameters and QoS parameters.
  • ATM connections of the "Constant Bit Rate, CBR” service class and the “Variable Bit Rate - real time, VBRrt” service class have a specific "Peak Cell Rate, PCR” as the guaranteed data transmission rate - also referred to as the “guaranteed minimum transmission capacity”
  • ATM connections of the ATM service class "Variable Bit Rate - non real time, VBRnrt” have a certain "Sustainable Cell Rate, SCR”
  • ATM connections of the ATM service class "Guaranteed Frame Rate, GFR” and ATM -Service class "Available Bit Rate, ABR” has a specific "Minimum Cell Rate, MCR” as the guaranteed data transfer rate.
  • the optical network control unit OLT uses one optical network termination unit depending on the O NU1 ... 3 associated with ATM connections and depending on the particular ATM service class of the associated ATM Verbindun ⁇ gene of the access of the individual optical network terminating units ONU1 ... 3 to the shared transmission medium "ves passivation optical network" PON controlled.
  • an access control unit MAC by means of which at the level of the ATM MAC layer - Medium Access Control - specifying on the basis of different, the single ⁇ NEN ATM connections ATM traffic parameters and QoS parameters it is determined in which optimal order the three optical network termination units ONU1 ... 3 in the "upstream direction" for information transmission access to the shared transmission medium "passive optical network” PON.
  • the shared transmission medium "passive optical network” PON has certain time-multiplex-oriented, transmission-related resources rpon and that the three optical network termination units ONU1 ... 3 each have transmission-related partial resources of the time-division-based transmission resources rpon are allocated, whereby the three optical network termination units ONU1 ... 3 are granted access to the "Passive Optical Network” PON as part of a TDMA access procedure.
  • a different number of ATM connections are made via the "Passive Optical Network” PON via the three optical network termination units ONU1 ... 3.
  • the optical power control unit OLT the first opti ⁇ 's network terminating unit 0NU1 first time division multiplex-oriented partial resources tprl of the Passive Optical Network work PON
  • the second optical network termination unit ONU2 second time-division multiplex-oriented partial resources TPR2
  • third optical network terminating unit ONU3 third time-multi plex ⁇ -oriented partial resources tpr3 allocated for the transmission of information in "Upstrea direction”.
  • the allocation of time-division multiplex-oriented partial resources tprl ... 3 by the optical network control unit OLT is also referred to as "grant generation".
  • FIG. 2 the current connection situation of ATM connections via one of the optical network termination units ONU1... 3 shown in FIG. 1 to the higher-level ATM communication network OKN is shown in FIG. 2 as an example.
  • three ATM connections vCBRl... 3 of the stringent class CBR according to the specification ITU-T 1.356 are carried out via the optical network termination unit ONU1 ... 3 shown.
  • an ATM connection vVBRrt of the ATM service class VBRrt x ATM connections vVBRnrtl ... x of the ATM service class VBRnrt
  • y ATM connections vGFRl ... y der ATM service class GFR and an ATM connection of the ATM service class vUBR.
  • the ATM cells transmitted via the ATM connection vVBRrt are temporarily stored in a second queue WS2. Furthermore, the ATM cells of the x ATM connections vVBRnrtl ...
  • x of the ATM service class VBRnrt are in a third to kth queue WS3 ... k and in a 1st to mth queue WSl .. .m each ⁇ because the ATM cells of the y ATM connections vGFRl ..y of the ATM service class GFR are buffered.
  • ATM cells of the ATM connection vUBR of the ATM service class UBR are temporarily stored in an nth queue WSn.
  • the queues of ATM connections of a tolerant ATM service class VBRrt, VBRnrt, UBR, GFR are read using the weighted fair queuemg algorithm - also known as WFQ scheduler.
  • WFQ scheduler the respective queues WS2 ... n are read out in a weighted manner depending on the ATM service class VBRrt, VBRnrt, UBR, GFR of the respective ATM connection.
  • the weighting factor of the respective queues WSl ... n arranged in an optical network termination unit ONUl 3 is configured to be parameterizable, the weighting factors of a control unit STG arranged in the optical network termination units ONUl ...
  • An absolute delay priority algorithm - also referred to as an ADP scheduler - is superordinate to the WFQ scheduler which the queue of ATM connections of the stringen ⁇ th class - here WS1 - are read out with priority.
  • the access control unit MAC arranged in the optical network control unit OLT reduces the transmission-related sub-resources tprl ... 3 ATM service classes individually assigned to the individual optical network termination units ONUl ...
  • the free transmission resource of the passive optical network PON in the "upstream direction" can be used flexibly by other optical network termination units ONUl ... 3 for the transmission of ATM cell bursts.
  • vUBR in order to implement central monitoring of the ATM traffic parameters and the QoS parameters of the respective ATM connections vCBRl... 3, vVBRrt, WBRnrtl ... x, vGFRl ... y, which are conducted via an optical network termination unit ONUl ... 3 , vUBR the current fill levels fsl ... n of the queues WSl ... n each arranged in an optical network termination unit ONU1 ... 3 - also referred to as "ONU output queues" - transmitted to the optical network control unit OLT
  • Querying the current queue fill levels fsl ... n of the queues WSl ... n directed in the "upstream direction" optical network termination unit ONUl ... 3 is carried out by the optical network control unit OLT in a fixed time frame.
  • the optical network control unit OLT In a fixed time frame.
  • In response from the respective optical network termination units Onul ... 3 corresponding to the current War ⁇ tesch long-levels representing queue level information fsl ... n using special minicells - also known as "mini-slots" means - to the optical network control unit OLT transmitted.
  • the queue fill level information fsl ... n of the queues WSl ... n arranged in an optical network termination unit ONUl ... 3 is advantageously transmitted individually, ie ONU1 ... 3 is in each case in the respective optical network termination unit the sum of the fill levels - referred to in FIG. 2 as ifs_CBR, ifs VBRrt, ifs_VBRnrt, ifs_GFR, ifs_UBR - of ATM connections vCBRl.,. 3, vVBRrt, vVBRnrtl ... x, vGFRl ...
  • an ATM service class CBR, VBRrt, VBRnrt, GFR, UBR is formed and transmitted to the optical network control unit OLT.
  • the sum of the fill levels of the respective queues assigned to the virtual connection is advantageously transmitted.
  • OLT optical network control unit OLT for each supplied ⁇ associated ATM service class CBR, VBRrt, VBRnrt, GFR, UBR a first upper ATM class of service of individual queue-provided gen-sum level limit value X HIGH 1 ... S or instructions ' saves.
  • the access control MAC arranged in the optical network control unit OLT is configured in such a way that the three optical network termination units ONUl ... 3 have access to the passive optical network PON
  • the following ATM traffic parameters are relevant for controlling the access to the Passive Optical Network PON for the respective ATM service classes:
  • the optical in the network control unit OLT be ⁇ dedicated access control unit MAC for the attached ⁇ closed
  • the optical network termination units Onul ... 3 is a high ⁇ exceed one of the data stored in the optical network control unit OLT
  • first upper ATM service class individual queues -Summenhellstands limits HIGH X 1 ... S is determined, is determined by the access control unit MAC to the affected optical network terminating unit Onul ... 3 allocated in redu ⁇ ed peripheral transmission technical Sectionres- source tprl ...
  • the allocated partial resources tprl ... 3 are at least based on the sum of the "peak cell rate (PCR)" of all CBR / VBRrt connections - fertilize increased, for ATM connections of the ATM service class VBRrt the allocated partial resources tprl ... 3 are increased at least to the sum of the "Sustainable Cell Rate (SCR)" of all VBRnrt connections, and - for ATM connections the ATM service class GFR, the allocated partial resources tprl ... 3 are increased at least to the sum of the "minimum cell rate (MCR)" of all GFR connections.
  • PCR peak cell rate
  • MCR minimum cell rate
  • ATM connections of the stringent class - that is to say the ATM connections vCBRl., 3 of the non-tolerant ATM service class CBR - are advantageous in the access control described 1 d 1 1 ⁇ d 1 1 1 1: fd 1 1 1 ⁇ 1 1
  • vVBRnrtl x, vGFRl ... y ..., vUBR of non-stringent th classes with the below each devisr for the ATM connection ⁇ minimum transmission capacity is read out.
  • the data stored in the optical network control unit OLT first upper, ATM Service Class individual queue sum menöllstands limits X HIGH 1 ... S and the dung individual in the optical network termination units ONU1 ... 3 stored second verbin ⁇ queue filling level Limit values V HIGH 1-S have a fixed relation to each other.
  • the ratio of these queue limit values y H iGH / xmGH depends on the polling frequency of the queue fill levels fsl ... n of the queues WSl ... n directed in the "upstream direction" and can be set to the value 1 from a specific polling frequency If the control unit STG arranged in the optical network termination unit ONU1... 3 determines that one of the second upper queue fill level limit values y H ⁇ G Hl-S is determined, the weighting factors of the queues WS1 ... n recalculated Using the newly calculated weighting factors, the queues WSl ... n are read out within the framework of the minimum transmission capacities guaranteed for the individual ATM connections.
  • the first upper ATM service class individual queue total fill level limit value X HIGH 1 ErasmusS assigned to a queue WSl ... n is advantageously used - controls the allocation of the transmission-related partial resources tprl ... 3 of the passive optical Network PON - set lower than the assigned second upper queue fill level limit value Y HI GHI-S - controls the WFQ scheduler of an optical network termination unit ONUl ... 3, whereby an overflow of a queue WSl ... n by the optical network control unit is recognized early.
  • Total fill level limit value and a second lower connection-specific queue fill level limit value are provided, wherein if the value falls below the first lower ATM service class assigned to a queue WSl ... n, individual, queue total fill level limit values correspond to those of the respective optical network termination unit ONUl ... 3 allocated transmission-technical partial resource tprl ... 3 reduced and if the value falls below the second lower connection-specific queue fullness limit, the readout speed of the WFQ scheduler is reduced - for example below the sum of the guaranteed minimum transmission capacities of all ATM connections vCBRl 3, vVBRrt, vVBRnrtl ... x, vGFRl. ..y, vUBR each of an ATM service class CBR, VBRrt, VBRnrt, GFR, UBR.
  • Total fill level limit values or connection-specific queue full level limit values can be carried out in a first step by input via a network management interface arranged in each case in the optical network termination units ONU1 ... 3 or in the optical network control unit OLT.
  • these queue fullness limit values are set by an algorithm in the respective optical network termination units ONU1 ... 3 or in the optical network control unit OLT depending on the ATM traffic parameters of the respective ATM connections vCBRl.,. 3 , vVBRrt, vVBRnrtl ... x, vGFRl. y, vUBR calculated.
  • the method according to the invention is particularly suitable for subscriber access networks ACCESS in which little or no signaling functionalities are transmitted to the ATM layer.
  • the method according to the invention can also be used for “switched virtual connections” or SVC connections.
  • the current ATM traffic parameters of the respective ATM connections vCBRl .3, vVBRrt, WBRnrtl ... x, vGFRl .. y , vUBR to the optical network termination units ONUl ... 3 and the optical network control unit OLT.
  • the OLT optical network control unit has an “ATM switch” functionality, the provision of the ATM traffic parameters for the optical network control

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

Abstract

Selon l'invention, des ressources partielles techniques de transmission (tpr1...3) affectées respectivement à plusieurs dispositifs de communication (ONU1...3) decentralisés sont au moins partiellement réduites et la qualité de transmission d'au moins une liaison (vCBR, vVBRrt, vVBRnrt1...x, vGFR1...y, vUBR) établie par l'intermédiaire de la ressource partielle (tpr1...3) réduite correspondante est déterminée. En fonction de ladite qualité de transmission, le volume de la ressource partielle (tpr1...3) correspondante est modifié ou maintenu. De façon avantageuse, on obtient une utilisation efficace des ressources techniques de transmission (rpon) tout en maintenant la qualité de transmission des diverses liaisons (vCBr, vVBRrt, vVBRnrt1...x, vGFR1...y, vUBR).
PCT/DE2000/002132 1999-06-30 2000-06-30 Procede et ensemble de communication pour l'adaptation de ressources techniques de transmission entre un dispositif de communication central et plusieurs dispositifs de communication decentralises WO2001003375A1 (fr)

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Application Number Priority Date Filing Date Title
EP00954298A EP1190529A1 (fr) 1999-06-30 2000-06-30 Procede et ensemble de communication pour l'adaptation de ressources techniques de transmission entre un dispositif de communication central et plusieurs dispositifs de communication decentralises
AU66826/00A AU6682600A (en) 1999-06-30 2000-06-30 Method and communication system for modifying transmission resources between a central communication device and several decentralised communication devices

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DE1999130228 DE19930228B4 (de) 1999-06-30 1999-06-30 Verfahren, Kommunikationsanordnung und Steuerungseinheit zur Anpassung von übertragungstechnischen Ressourcen zwischen einer zentralen und mehreren dezentralen Kommunikationseinrichtungen
DE19930228.6 1999-06-30

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DE10108048A1 (de) * 2001-02-20 2002-09-05 Siemens Ag Verfahren zum Vermitteln von Verbindungen, zugehörige Kommunikationsanordnung, zugehörige Kommunikationseinrichtung und zugehöriges Programm
DE10123193A1 (de) 2001-05-12 2002-11-14 Alcatel Sa Verfahren und Vorrichtungen zur Datenübertragung mit zeitlich veränderlicher Datenrate

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DE19930228A1 (de) 2001-01-11
DE19930228B4 (de) 2005-12-08
EP1190529A1 (fr) 2002-03-27

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