Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L43/00—Arrangements for monitoring or testing data switching networks
  • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
  • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
  • H04L43/0894—Packet rate
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
  • H04L41/08—Configuration management of networks or network elements
  • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L47/00—Traffic control in data switching networks
  • H04L47/10—Flow control; Congestion control
  • H04L47/12—Avoiding congestion; Recovering from congestion
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L47/00—Traffic control in data switching networks
  • H04L47/10—Flow control; Congestion control
  • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
  • H04L47/2416—Real-time traffic
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L47/00—Traffic control in data switching networks
  • H04L47/10—Flow control; Congestion control
  • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
  • H04L47/263—Rate modification at the source after receiving feedback
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/02—Traffic management, e.g. flow control or congestion control
  • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/02—Traffic management, e.g. flow control or congestion control
  • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/02—Traffic management, e.g. flow control or congestion control
  • H04W28/10—Flow control between communication endpoints
  • H04W28/12—Flow control between communication endpoints using signalling between network elements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L43/00—Arrangements for monitoring or testing data switching networks
  • H04L43/16—Threshold monitoring
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
  • H04W28/18—Negotiating wireless communication parameters
  • H04W28/20—Negotiating bandwidth
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
  • H04W28/18—Negotiating wireless communication parameters
  • H04W28/22—Negotiating communication rate
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W8/00—Network data management
  • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
  • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W84/00—Network topologies
  • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
  • H04W84/10—Small scale networks; Flat hierarchical networks
  • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

• the present invention relates to a data transmission method within a telecommunication system including a plurality of terminals able to exchange data streams between them via at least one communication network.
• a second decision-making algorithm is furthermore provided for realizing a distribution optimal flow on the various remaining interfaces, after any re-allocation of the stream or flows executed by the fast algorithm.
• a slow algorithm is furthermore provided for realizing a distribution optimal flow on the various remaining interfaces, after any re-allocation of the stream or flows executed by the fast algorithm.
• an appearance or reappearance of an interface will be taken into account by the fast algorithm which will be able to redirect towards this new interface flows passing through other less advantageous interfaces, such a re-direction being then followed by a implementation of the slow algorithm in order to optimally distribute the flows on the various interfaces that co-exist within the terminal considered.
• One of the aims of the invention is to propose a method of data transmission according to which congestion phenomena of one or more interfaces of a terminal will be immediately detected and quickly taken into account so as to prevent as much as possible any interruption of flow can be due to saturation of the corresponding interface.
• the present invention has the utility of allowing a given terminal to control a flow rate adjustment through one or more interfaces which it is provided to allow optimal and dynamic management resources offered by said interface or interfaces.
• a data transmission method according to the introductory paragraph is characterized according to the invention in that it includes:
• a rate adjustment step intended to be executed by an entity issuing said particular flow when the maximum value of flow offered by the interface is less than the accumulated value and after receiving a setting value, during which the the lowest value between said setting value and the value currently assigned to said particular stream by the transmitting entity is attributed to the rate of said particular stream.
• the invention allows a given terminal to control a flow control of a particular flow that passes through one of its interfaces when said interface is engorged, such an adjustment being possible both in a case where the issuing entity is included in the terminal considered and then generates a so-called outgoing flow, only in a case where the transmitting entity is included in a remote terminal, and then transmits a so-called flow. entering the terminal concerned.
• this remote terminal will be required to adjust the flow rate of the flow or flows it emits, not only according to its own transmission capacity, but also according to a capacity that will have the terminal given to absorb and process the flow that it is intended to receive, a capacity that is implicitly described by the content of the adjustment signal as a function of parameters relating to the activity of the given terminal that the remote terminal can not know.
• the rate adjustment step is performed by the transmitting entity after receiving the setting value by assigning the flow rate of the particular flow the lowest value between the value of setting and the value currently assigned to said particular flow by the transmitting entity.
• This embodiment is intended to ensure that the flow rate setting by the transmitting entity can be done only in the direction of a reduction, so that a security is thus established in order to make it impossible to increase the flow rate. that would be inconsistent with the investee's own resources, a situation that might otherwise occur in a case where the set value would be higher than the value of the flow commonly assigned to the particular flow by the issuing entity.
• the flow values involved in the calculation of the cumulative value may correspond to flows actually passing through the interface considered, but such a value may also correspond to a flow which does not yet pass through the interface, but whose establishment was requested from the terminal considered by a remote terminal.
• the remote terminal will have issued a request to establish a new stream for the terminal in question, a request specifying a rate value to be attributed to said new stream.
• this rate value to be allocated will be sufficiently high to cause saturation of the interface, the terminal considered will send back to the remote terminal a setting signal carrying a rate value considered acceptable by the terminal considered.
• the remote terminal can send an acknowledgment signal having a shape similar to that of a setting signal carrying a value of setting equal to the specified value, to confirm to the remote terminal the acceptance by the terminal considered of this rate value for the new flow whose establishment was required.
• a method such as. described above includes a step of determining a plurality of acceptable rate values for at least one particular data stream, the setting value transmitted during execution of the rate setting step of a particular stream being formed by the flow rate nominal value of said particular flow which is immediately below its current flow rate.
• a method as described above also includes a step of classification according to a predetermined priority order of the various flows attributed to each interface, the flows to be submitted. at a rate adjustment step then being intended to be selected in order of increasing priority.
• the classification stage thus makes it possible to privilege the transmission of some types of data compared to others.
• data defining stimuli to be rendered in real time to a user of the terminal such as those conveyed in an audio stream or a video stream in the context of a videophone application, may be considered as priority over a textual data streams for the transmission of which a latency may appear acceptable, because imperceptible to the user who can not contrario to be inconvenienced by an interruption, even momentary, audio or video stimuli.
• the flow of textual data which will have previously been assigned a lower priority order than that allocated to the audio and video streams, will be subject to the adjustment step throughput to free up bandwidth for other higher priority streams.
• a method according to the above description will also advantageously include a switching step to be performed within such a terminal, during which another interface is assigned to a flow subjected to this switching step when the maximum value of flow offered by the interface is less than the cumulative value.
• the switching step provided in this variant of the invention is intended to allow to unclog a saturated interface, in a situation where one or more stages of reduction of flow will have been insufficient to achieve this result, by redirecting one or more flows data to an interface other than their current interface, which is not possible in the current state of the art according to which such switching is possible only in case of total loss of the current interface.
• the present invention makes it possible to achieve optimal and dynamic management of the specific bandwidths of the various interfaces in line with variations in the operating conditions of said interfaces, the stream to be subjected to a switching step being able for example to be selected in order of increasing priority.
• the method described above also includes a step of selecting that of these streams which has a minimum flow rate which makes it possible to obtain, when it is subtracted from the sum of flow rate values. allocated to the streams intended to pass through the interface in question, a value closest to that of the available bit rate offered by this interface, the stream thus selected being then intended to be subjected to a switching step.
• Such a selection step makes it possible to exploit the entire measurement of the bandwidth of an interface by only submitting to the switching step the stream or flows whose disappearance will make it possible to obtain a total transmission rate through the interface. interface considered as close as possible to the rate actually made available by this interface at a given time.
• Such a comparison of the effects produced by disappearances of films may be made only between streams presenting the same degree of priority, but such a comparison may alternatively be operated independently of the respective degrees of priority of these flows, the degrees of priority then being intended to be taken into account only in the presence of two flows whose disappearances would produce identical effects in terms of bandwidth release.
• any submission to the switching step of the stream in question will be inhibited until the actual flow allocated by the interface to said flow concerned has not been reduced to a minimum value which will be constituted, when several acceptable flow rate nominal values have been determined for this flow during the determination step, by the lowest of said values.
• This particular mode of implementation of the variant of the invention makes it possible to choose to preferentially reduce, in the event of saturation of an interface, the flow rates of the non-priority flows to their minimum values, without modifying the flow rates of the flows. priority, and, if this measure is not sufficient to unclog the interface, to subject to the switching step, in order of increasing priority, these non-priority flows, without the flow rates of the priority flows being found therein. altered.
• the switching step may be inhibited as long as the rates actually allocated by the interface to the flows that pass through it will not all have been reduced to their values. respective minimums.
• the method which conforms thereto is characterized in that it furthermore includes a step of increasing the flow rate after a switching step and intended to to increase the rate of a particular stream subjected to said step of increasing.
• the step of increasing is a particular type of setting step, for the execution of which the sending entity will assign the flow rate of the flow concerned the setting value, except in a case where such a value would be too important to be compatible with the resources available to the issuing entity, in which case the issuing entity will signify its inability to perform the required increase.
• the invention also relates, as a product obtained directly during the implementation of a method according to the preceding description, to a signal intended to convey a particular data stream through an interface included in a terminal, which signal includes at least one field defining a minimum rate for forming a component of a cumulative value resulting from a sum of bit rate values to be assigned to the streams intended to transit through said interface, which accumulated value is intended to be compared, within said terminal, to an available rate offered by this interface.
• the transmission method described above can be implemented in various ways, in particular in hard-wired form or in software form.
• the invention therefore also relates, as a means useful for its implementation, a computer program product downloadable via a telecommunications network and / or stored in a memory of a central unit and / or stored on a memory medium intended to cooperate with a reader of said central unit, said program being intended to be implemented within a terminal capable of transmitting and / or receiving at least one data stream, which program includes: . at least one instruction ordering the execution of a comparison step between a maximum rate value offered by an interface through which a particular stream travels and a cumulative value resulting from a sum of bit rate values to be attributed to the flows intended for to transit through said interface, and. at least one instruction ordering the execution of a step of transmitting a setting value to a transmitting entity of said particular stream, which transmission step is intended to be executed when the maximum value of bit rate offered by the interface is less than to the accumulated value.
• the invention also relates to a data medium on which is stored a computer program according to the preceding description, or intended to store, with reference to an identifier designating a data stream conveyed by a signal such as as defined above, at least one value of a minimum flow rate specific to said data stream.
• the invention also relates to a telecommunication system including a plurality of terminals able to exchange data streams with each other via at least one communication network, characterized in that it includes:
• flow reduction means adapted to adjust the flow rate of said particular flow and intended to be activated by transmitting a setting value to an entity transmitting said flow when the maximum value of flow offered by the interface is less than the accumulated value .
• the invention also relates to a terminal capable of transmitting and / or receiving at least one data stream, terminal characterized in that it includes:
• flow reduction means adapted to adjust the flow rate of said particular flow and intended to be activated after receiving a setting value to be produced when the maximum bit rate offered by the interface is less than the accumulated value.
• Fig. 1 is a block diagram illustrating a telecommunication system in which the invention is implemented
• Fig.2 is a block diagram showing a terminal included in such a telecommunication system.
• Fig.3 is a sequential diagram showing a method according to an advantageous embodiment of the invention.
• Fig. 1 schematically shows a telecommunication system SYST. including a plurality of terminals T 1 ... Tt ... Th able to exchange data streams Strl ... Strt ... Strh via N distinct communication networks CNWl, CNW2 ... CNWN.
• various communication networks may be one or more cable networks of the RTC type (abbreviation known to those skilled in the art of the term "Switched Telephone Network”), one or more cellular radio networks of GSM or UMTS type (known abbreviations those skilled in the art of the respective English names "Global System for Mobiles" and "Universal Mobile Telecommunication System”), or one or more local wireless networks such as networks compliant with the IEEE 802.3, IEEE 802.11 or IEEE 802.15 standards.
• the different data streams Str1 ... Strt ... Strh are intended to be transmitted and / or received by DPM processing means 1 ... DPMt ... DPMh data conveyed by said streams, via a plurality of means interface IM 1 ... IMt ... IMh.
• the interface means IMt of the terminal Tt are traversed by a composite stream STR which contains particular streams Str1 and Strh respectively transmitted by the terminals T1 and Th.
• monitoring DCt included in the terminal Tt detects a saturation of one or more interfaces included in the interface means IMt, this monitoring module DCt produced, in the present example for each stream Strl and Strh to which respective identifiers IdI and Idh have previously been allocated, a control value DrI and Drh to achieve a reduction of the flow rates of said streams Strl and Strh to release bandwidth at the interface means IMt.
• Adjustment values DrI and Drh are transmitted by means of Tun (Strl, DrI) and Tun (Strh, Drh) control signals to the terminals Tl and Th which have been. recognized by the identifiers IdI and Idh as respectively containing the transmitting entities of the particular streams Str1 and Strh, in this case the processing means DPM1 and DPMh, each of which will then allocate to the flow of the stream Str1 or Strh that it transmits the value the lower between the setting value DrI or Drh and the value currently assigned to said flow Strl or Strh, which ensures that the flow rate setting by the transmitting entity can be done only in the direction of a compatible reduction with the resources of the relevant terminal Tl and Th.
• the monitoring module DCt of the terminal Tt can simultaneously internally transmit an additional adjustment value Drt to the processing means DPMt which may constitute an entity transmitting an outgoing stream Strt whose bit rate must also be reduced.
• Drt additional adjustment value
• a DrhO rate value involved in the calculation of the cumulative value may also correspond to a flow that does not yet pass through the interface, for example the stream Strh before its actual establishment, which will then be requested from the terminal Tt by the remote terminal Th by means of a request for setting SeRq (DrhO) of a new stream Strh sent to the terminal Tt, which request specifying a value of bit rate DrhO to be allocated to said new stream Strh
• this value of bit rate DrhO will be high enough to cause saturation of the interface means IMt
• the terminal Tt will send in return to the terminal Th a Tun tuning signal (Strh, Drh) carrying a Drh rate value considered acceptable by the terminal Tt.
• this terminal can send a Tun acknowledgment signal (Strh, DrhO) having a shape similar to that of a signal of a carrier setting of a setting value equal to the specified value DrhO, to confirm to the terminal Th the acceptance by the terminal Tt of this DrhO rate value for the new stream Strh whose establishment was required.
• a Tun acknowledgment signal (Strh, DrhO) having a shape similar to that of a signal of a carrier setting of a setting value equal to the specified value DrhO
• Fig.2 shows in more detail the terminal Tt included in the telecommunication system described above.
• this terminal Tt comprises interface means IMt, which include, in the embodiment illustrated here, SWM switching means able to switch to a new interface a particular stream initially transiting to Through a given interface, such a switching may in particular occur when the maximum value of the bit rate offered by the given interface is less than a sum of bit rate values attributed to the flows actually passing through said interface.
• the terminal Tt comprises a flow monitoring module DCt which contains a CPU central unit able to control input / output means I / O and a memory MEM in which is stored in the form of a Following instructions a method according to the invention to achieve an optimization of the distribution of flows (Str 11 ... Str 1 k) ... (Strp 1 ... Strpq) on the various interfaces INTl ... INTP.
• a flow monitoring module DCt which contains a CPU central unit able to control input / output means I / O and a memory MEM in which is stored in the form of a Following instructions a method according to the invention to achieve an optimization of the distribution of flows (Str 11 ... Str 1 k) ... (Strp 1 ... Strpq) on the various interfaces INTl ... INTP.
• the monitoring module DCt includes in the present example means for adjusting the effective flow rates of the streams (Str 11 ... Str Ik) ... (Strp 1 ... Strpq) intended to cross the interfaces INTl ... INTP, which means of adjustment are able to send to an issuing entity which has generated a particular flow a control signal
• the monitoring module DCt is here intended to register within this table TAB information relating to the flow rates of the various flows through the various interfaces, and to extract from this table TAB Strinf information about these flows. If, in the example described here, the table TAB is recorded outside the monitoring module DCt, this table TAB can be stored, in other embodiments of the invention, within the frame itself. MEM memory included in the.
• each segment of the TAB table furthermore includes a plurality of scales of nominal bit rate values each allocated to a stream traversing the interface considered and conveyed in included fields. in said flows, for example the scales of values noted (Dr 11 M ... Dr 11 m) ... (Dr IkM ... Dr lkm) which are respectively allocated to streams Strl 1 ... Strlk crossing the interface Intl.
• the lowest of the nominal bit rates Drljm allocated to a stream Strlj constitutes the minimal flow specific to said stream Strlj, each these flows being further provided with a priority degree Pl 1 ... PIk of its own, each stream Str 11 ... Strlk being further associated with a predefined set (Tl 1 ... TIr). (TkI ... Tks) types of interfaces with which this flow is compatible, arranged in a predetermined order of preference.
• the monitoring module DCt is able to detect a saturation of a given interface, for example the interface INTl, which will result in the fact that a cumulative value Dtfl of the flows of the streams (Str 11 ... Str Ik) allocated at this interface becomes greater than a DMl value of the available bit rate actually offered at the instant considered by the given interface INTl.
• This monitoring module DCt can then transmit, on the one hand, at least one tuning signal Tun (Strj, Drj) intended for the transmitting entity of the stream Strj which will thus be instructed to adjust the bit rate of said stream Strj to a value Drj, and on the other hand a switching signal Cm (Str, Int) for an ISM control module SWM switching means, and carrying an identifier Int of the interface to be assigned to a stream Str.
• Tun Stringj, Drj
• Cm for an ISM control module SWM switching means
• the monitoring module DCt thus has, in addition to the possibility of increasing or reducing the flow rate Strj transiting through the interface means IMt, that of ordering the reassignment of a stream Str to another interface than its current interface by producing an interface identifier Int distinct from that currently assigned to said stream Str, the type of the new interface being chosen in order of decreasing preference within the set of types of interfaces with which this stream is compatible .
• the ISM control module will decode for this purpose the switching signal Cm (Str, Int), and produce a control signal Iswc SWM switching means to perform the instructions conveyed by said switching signal Cm (Str, Int ).
• FIG. 3 illustrates, in the form of a step diagram, the operation of a data transmission method that allows optimal management of the resources offered by a particular interface, in accordance with a particular mode of implementation of the invention.
• This method is distinguished by including an initial CMPO comparison step, in which a cumulative value DTF resulting from a sum of bit rate values associated with the various streams to which the particular interface has been allocated is compared to a maximum value DM of the bit rate offered by said particular interface at the instant considered.
• an NPDEC step of reducing flow rates of non-priority flows is executed.
• a first test step of a first type T1 is then performed, for the purpose of determining whether the reduction of the flow rates of the non-priority flows has been sufficient to unclog the interface, which is achieved by comparing with the maximum value of flow.
• DM a new cumulative value DTF, obtained after execution of the adjustment step. If not, a DTFDEC step for reducing the flows of the priority streams is executed.
• This reduction is here made in steps, that is to say that after the value of the flow of a priority flow has been replaced by its immediately lower nominal value, a new test step of the first type T1 will be executed for determine if the newly performed decrease was sufficient to unclog the interface.
• various DTFDEC steps to reduce allocated bit rates through the interface to the priority flows can be executed according to several possible operating alternatives. We can thus choose a first option consisting of executing several successive reductions on several separate streams to which the same degree of priority has been allocated, so as not to penalize any of these flows in relation to his peers.
• a second option consisting of continuing to reduce the flow of a particular stream until it reaches its minimum value, only to begin to reduce the flow of another stream to which the same priority will have been allocated, and so on until the interface has been unloaded. It may further be considered to proceed for each flow only one flow reduction operation intended to reduce all of a sudden this flow to its minimum value.
• a new test step of the first type T1 will then determine if this switching will be sufficient to unclog the interface, which is to compare a posteriori the minimum flow Drm the selected flow available flow offered to this stream by its current interface. As long as the interface is full, non-priority streams will be subject to new STRCOM switching steps.
• the selection of the stream to be subjected to the switching step STRCOM may be carried out in a sequence that is the inverse of that previously described, which sequence will be preferentially subjected to STRCOM switch stage of the flows whose disappearance will achieve a cumulative value DTF closest to the maximum value DM flow offered by the interface, regardless of the degree of priority of this flow, the degrees of priority n ' then being intended to be taken into account only in the presence of two flows whose disappearances would produce identical effects in terms of bandwidth release.
• the iterative process previously described will continue until the available rate DM becomes again greater than or equal to the value of the cumulative rates DTF.
• the setting thus obtained is saved during a validation step SVSET of the parameters, which will itself be followed by a new comparison step CMPO, in order to operate a constant monitoring of the conditions of communication interface that allows to adapt the configuration dynamically.
• a next step DTFINC for increasing the throughput of a stream having a higher degree of priority is executed, for example by selection. its flow rate value immediately above its current flow rate, which rate increase step DTFINC is followed by a test step of a third type T22, similar to a test step of the first type and to determine whether this increase had the effect of saturating the interface again. If this is the case, it is the previous rate setting that will be saved during a PRVSET validation step of the parameters. If not, a new step DTFINC rate increase will be executed, and then submitted to validation by a new test step of the third type T22, the different flows subjected to successive DTFINC stages of increase of flow being chosen in order of decreasing priority.

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• Engineering & Computer Science (AREA)
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• Environmental & Geological Engineering (AREA)
• Data Exchanges In Wide-Area Networks (AREA)

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  • 2006-09-06 WO PCT/EP2006/008654 patent/WO2007028577A1/fr active Application Filing
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