WO2004088933A1 - Dispositif et procede d'adaptation de debit entre des flux binaires - Google Patents

Dispositif et procede d'adaptation de debit entre des flux binaires Download PDF

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Publication number
WO2004088933A1
WO2004088933A1 PCT/EP2003/003296 EP0303296W WO2004088933A1 WO 2004088933 A1 WO2004088933 A1 WO 2004088933A1 EP 0303296 W EP0303296 W EP 0303296W WO 2004088933 A1 WO2004088933 A1 WO 2004088933A1
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WO
WIPO (PCT)
Prior art keywords
rate
buffer
mode
fill level
bit stream
Prior art date
Application number
PCT/EP2003/003296
Other languages
English (en)
Inventor
Lars Gilbert Larsen
Terje Eriksen
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/EP2003/003296 priority Critical patent/WO2004088933A1/fr
Priority to AU2003304024A priority patent/AU2003304024A1/en
Publication of WO2004088933A1 publication Critical patent/WO2004088933A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6489—Buffer Management, Threshold setting, Scheduling, Shaping

Definitions

  • the invention relates to a connecting device, in particular to a connecting device sending and receiving bit streams of different rate.
  • the redundant bits can be detected and the relevant information can be reconstructed. Accordingly, if the output stream is transmitted with a lower rate than the input stream, the input stream has to comprise detectable redundant bits.
  • the rate adaptation device removes the redundant bits from the input stream and sends an output stream comprising the relevant information that has been transmitted by the input stream.
  • a connecting device receives a first bit stream of a first rate and sends a second bit stream of a second rate.
  • the first rate differs from the second rate.
  • the connecting device comprises a buffer and a rate adaptation device.
  • the connecting device is operable according to a first and a second mode of operation.
  • the buffer receives the first bit stream as an input and sends the second bit stream as an output.
  • the difference between the first and the second rate causes a change of a fill level of the buffer.
  • the buffer and the rate adaptation device are connected in a serial connection receiving the first bit stream as an input and sending the second bit stream as an output.
  • the input rate and the output rate of the buffer differ in a way that causes a change of the fill level of the buffer in an opposite direction than the change of the fill level in the first mode of operation.
  • a first threshold value indicating a high fill level and a second threshold value indicating a low fill level are defined for the buffer.
  • the buffer comprises means for detecting a fill level of the buffer that triggers a switch between the modes of operation if the fill level of the buffer reaches the first or the second threshold value.
  • a switch between the first and the second mode of operation is made if the fill level of the buffer reaches the first respectively the second threshold value.
  • the first rate is higher than the second rate and in the second mode of operation the input rate of the buffer is lower than the output rate of the buffer.
  • the rate adaptation device receives a stream comprising detectable redundant bits and the rate adaptation device removes at least a portion of the redundant bits. By this the relevant information transmitted by the second bit stream is not changed.
  • the first rate is lower than the second rate and in the second mode of operation the input rate of the buffer is higher than the output rate of the buffer.
  • the rate adaptation device sends a stream comprising detectable redundant bits inserted by the rate adaptation device.
  • the first or the second bit stream can be a synchronous bit stream.
  • a Media Gateway comprises a connecting device as described above.
  • the present invention provides a method for controlling a connecting device.
  • This connecting device receives a first bit stream of a first rate and sends a second bit stream of a second rate wherein the first rate differs from the second rate.
  • the connecting device comprises a buffer and a rate adaptation device. For the buffer a first threshold value indicating a high fill level and a second threshold value indicating a low fill level are defined.
  • the buffer comprises means for detecting a fill level.
  • the connecting device is operable according to a first and a second mode of operation. In the first mode of operation the buffer receives the first bit stream as an input and sends the second bit stream as an output and the difference between the first and the second rate causes a change of a fill level of the buffer.
  • the buffer and the rate adaptation device are connected in a serial connection receiving the first bit stream as an input and sending the second bit stream as an output.
  • the input rate and the output rate of the buffer differ in a way that causes a change of the fill level of the buffer in an opposite direction than the change of the fill level in the first mode of operation.
  • the method of the invention comprises the steps of detecting that the fill level of the buffer has reached the first or the second threshold value and changing in response to the detecting the mode of operation from the first to the second mode or vice versa.
  • a computer program controls a connecting device in a way that it performs the method described above.
  • Fig. 1. depicts a source device and a destination device connected by a connecting device that is operated according to a first mode of operation.
  • Fig. 2. depicts the source device, the destination device and the connecting device connecting the source and the destination device, wherein the connecting device is operated according to a second mode of operation.
  • Figure 1 depicts a source device 1 sending a first bit stream of a first rate to a connecting device 8. Furthermore figure 1 depicts a destination device 5 receiving a second bit stream of a second rate from this connecting device 8. The first and the second rate are different. The first stream is received by the connecting device 8 via a first link 2 and the second stream is sent by the connecting device 8 via a second link 6.
  • the source device 1 and the destination device 5 can be e.g. a modem or a mobile station and the connecting device can be comprised in a Media Gateway.
  • the first and the second bit stream comprise the same relevant information. Additionally the first and the second bit stream can comprise detectable redundant bits.
  • the first and the second bit stream can be synchronous bit streams.
  • the connecting device is operated in a first mode of operation, in which the first bit stream is received by a buffer 4, the data comprised in the first bit stream is stored by the buffer 4 and the second bit stream is output of the buffer 4.
  • the fill level of the buffer 4 changes continuously according to the difference between the first and the second rate. I.e. if the first rate is higher than the second rate the fill level is continuously rising and if the first rate is lower than the second rate the fill level is continuously falling.
  • a second mode of operation of the connecting device exists, that will be explained in more detail in the description of figure 2.
  • the switch between the first and the second mode of operation can be based for example on a predefined time scheme or on counters. Alternatively the switch can be based on the fill level of the buffer 4. In this case for the buffer 4 a first threshold value 7 indicating a high fill level and a second threshold value 3 indicating a low fill level can be defined. Furthermore the buffer can comprise means for detecting a fill level of the buffer that triggers a switch between the modes of operation if the fill level of the buffer 4 reaches the first 7 or the second threshold value 3.
  • Figure 2 depicts the source device 1, the first link 2, the connecting device 8, the second link 6 and the destination device 5 of figure 2 with the difference that the connecting device 8 is operated according to a second mode of operation. Elements that are equal to the elements depicted in figure 1 are indicated by the same reference signs as in figure 1 and will not be described newly.
  • figure 2 depicts a rate adaptation device 9 connected in a serial connection with the buffer 4 via the connection 10.
  • the rate adaptation device 9 and the buffer 4 are ordered such that the buffer 4 is arranged upstream in relation to the rate adaptation device 9.
  • the buffer 4 could be arranged downstream in relation to the buffer.
  • a third stream of a third rate is output by the buffer 4 and transmitted via the connection 10 to the rate adaptation device 9.
  • the input rate and the output rate of the buffer are chosen such that the difference between the input rate and the output arte of the buffer causes a change of the fill level in the opposite direction than the change of the fill level in the first mode of operation.
  • the rate adaptation device has to compensate the rate difference between an input rate that is higher than the output rate. This can be achieved by the removal of detectable redundant bits by the rate adaptation device, wherein the detectable redundant bits have been comprised in the third bit stream.
  • a method for removing stop bits according to the specification V.14 of the International Telecommunications Union - Telecommunications (ITU-T) can be used. This method comprises the conversion of a synchronous bit stream input to the rate adaptation device to an asynchronous bit stream and the conversion of this asynchronous bit stream to a synchronous bit stream output by the rate adaptation device.
  • a switch from the first to the second mode of operation is made if the fill level of the buffer reaches the first threshold value 7 indicating a high fill level.
  • the buffer 4 receives data exceeding the capacity of the buffer 4 (overflow).
  • a switch from the second to the first mode of operation is made if the fill level of the buffer reaches the second threshold value 3 indicating a low fill level. By this the situation is avoided that the buffer 4 is running empty (underflow).
  • the input rate of the buffer has to be higher than the output rate of the buffer such that the fill level of the buffer is continuously rising.
  • this can be achieved by choosing the third rate such that it is lower than the first rate.
  • the buffer 4 is arranged downstream in relation to the rate adaptation device 9, the input rate of the buffer had to be chosen such that it is higher than the second rate.
  • the rate adaptation device has to compensate the rate difference between an input rate that is lower than the output rate. This can be achieved by the insertion of detectable redundant bits by the rate adaptation device.
  • a method for insertion of stop bits according to the specification V.14 of the International Telecommunications Union - Telecommunications (ITU-T) can be used. This method comprises the conversion of a synchronous bit stream input to the rate adaptation device to an asynchronous bit stream and the conversion of this asynchronous bit stream to a synchronous bit stream output by the rate adaptation device.
  • a switch from the first to the second mode of operation is made if the fill level of the buffer reaches the second threshold value 3 indicating a low fill level.
  • the buffer 4 is running empty (underflow).
  • a switch from the second to the first mode of operation is made if the fill level of the buffer reaches the first threshold value 7 indicating a high fill level.

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

Abstract

La présente invention a trait à un dispositif de connexion (8) recevant un premier flux binaire d'un première débit et transmettant un deuxième flux binaire d'un deuxième débit, dans lequel les premier et deuxième débits sont différents. Le dispositif de connexion (8) comporte une mémoire tampon (4) et un dispositif d'adaptation de débit (9). Le dispositif de connexion (8) est opérable selon des premier et deuxième modes de fonctionnement. Dans le premier mode de fonctionnement une modification de niveau de remplissage de la mémoire tampon (4) compense la différence entre les premier et deuxième débits. Dans le deuxième mode de fonctionnement, la mémoire tampon (4) et le dispositif d'adaptation (9) sont reliés en une connexion en série. Dans le deuxième mode de fonctionnement, le débit d'entrée et le débit de sortie de la mémoire tampon (4) présentent une différence qui entraîne une modification du niveau de remplissage de la mémoire tampon (4) en un sens opposé à la modification du niveau de remplissage dans le premier mode de fonctionnement.
PCT/EP2003/003296 2003-03-29 2003-03-29 Dispositif et procede d'adaptation de debit entre des flux binaires WO2004088933A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2003/003296 WO2004088933A1 (fr) 2003-03-29 2003-03-29 Dispositif et procede d'adaptation de debit entre des flux binaires
AU2003304024A AU2003304024A1 (en) 2003-03-29 2003-03-29 Device and method for rate adaptation between bit streams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/003296 WO2004088933A1 (fr) 2003-03-29 2003-03-29 Dispositif et procede d'adaptation de debit entre des flux binaires

Publications (1)

Publication Number Publication Date
WO2004088933A1 true WO2004088933A1 (fr) 2004-10-14

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AU (1) AU2003304024A1 (fr)
WO (1) WO2004088933A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006074072A3 (fr) * 2004-12-30 2006-12-07 Citrix Systems Inc Systemes et procedes de mise a disposition de techniques d'acceleration cote client
WO2007073328A3 (fr) * 2005-12-22 2007-08-16 Ericsson Telefon Ab L M Noeud de traitement de reseau et procede de manipulation de paquets
WO2009079320A2 (fr) * 2007-12-18 2009-06-25 Ibiquity Digital Corporation Procédé de diffusion en continu au moyen d'un service de données sur un sous-système de liaison radio
US7810089B2 (en) 2004-12-30 2010-10-05 Citrix Systems, Inc. Systems and methods for automatic installation and execution of a client-side acceleration program
US8255456B2 (en) 2005-12-30 2012-08-28 Citrix Systems, Inc. System and method for performing flash caching of dynamically generated objects in a data communication network
US8261057B2 (en) 2004-06-30 2012-09-04 Citrix Systems, Inc. System and method for establishing a virtual private network
US8291119B2 (en) 2004-07-23 2012-10-16 Citrix Systems, Inc. Method and systems for securing remote access to private networks
US8301839B2 (en) 2005-12-30 2012-10-30 Citrix Systems, Inc. System and method for performing granular invalidation of cached dynamically generated objects in a data communication network
US8351333B2 (en) 2004-07-23 2013-01-08 Citrix Systems, Inc. Systems and methods for communicating a lossy protocol via a lossless protocol using false acknowledgements
US8495305B2 (en) 2004-06-30 2013-07-23 Citrix Systems, Inc. Method and device for performing caching of dynamically generated objects in a data communication network
US8499057B2 (en) 2005-12-30 2013-07-30 Citrix Systems, Inc System and method for performing flash crowd caching of dynamically generated objects in a data communication network
US8549149B2 (en) 2004-12-30 2013-10-01 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP multiplexing
US8559449B2 (en) 2003-11-11 2013-10-15 Citrix Systems, Inc. Systems and methods for providing a VPN solution
US8700695B2 (en) 2004-12-30 2014-04-15 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP pooling
US8706877B2 (en) 2004-12-30 2014-04-22 Citrix Systems, Inc. Systems and methods for providing client-side dynamic redirection to bypass an intermediary
US8739274B2 (en) 2004-06-30 2014-05-27 Citrix Systems, Inc. Method and device for performing integrated caching in a data communication network
US8954595B2 (en) 2004-12-30 2015-02-10 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP buffering

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761763A (en) * 1985-06-28 1988-08-02 Northern Telecom Limited Rate adaptation circuit and method for asynchronous data on digital networks
US5251313A (en) * 1990-11-19 1993-10-05 Ag Communication Systems Corporation Method of bit rate adaption using the ECMA 102 protocol
WO1998019411A1 (fr) * 1996-10-30 1998-05-07 Nokia Telecommunications Oy Synchronisation independante du reseau dans un systeme de telecommunications
US6201976B1 (en) * 1996-01-08 2001-03-13 Nokia Telecommunications Oy Method and apparatus for enabling data transmission between a mobile network and a fixed network having different data rates

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761763A (en) * 1985-06-28 1988-08-02 Northern Telecom Limited Rate adaptation circuit and method for asynchronous data on digital networks
US5251313A (en) * 1990-11-19 1993-10-05 Ag Communication Systems Corporation Method of bit rate adaption using the ECMA 102 protocol
US6201976B1 (en) * 1996-01-08 2001-03-13 Nokia Telecommunications Oy Method and apparatus for enabling data transmission between a mobile network and a fixed network having different data rates
WO1998019411A1 (fr) * 1996-10-30 1998-05-07 Nokia Telecommunications Oy Synchronisation independante du reseau dans un systeme de telecommunications

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8559449B2 (en) 2003-11-11 2013-10-15 Citrix Systems, Inc. Systems and methods for providing a VPN solution
US8261057B2 (en) 2004-06-30 2012-09-04 Citrix Systems, Inc. System and method for establishing a virtual private network
US8739274B2 (en) 2004-06-30 2014-05-27 Citrix Systems, Inc. Method and device for performing integrated caching in a data communication network
US8726006B2 (en) 2004-06-30 2014-05-13 Citrix Systems, Inc. System and method for establishing a virtual private network
US8495305B2 (en) 2004-06-30 2013-07-23 Citrix Systems, Inc. Method and device for performing caching of dynamically generated objects in a data communication network
US8291119B2 (en) 2004-07-23 2012-10-16 Citrix Systems, Inc. Method and systems for securing remote access to private networks
US8634420B2 (en) 2004-07-23 2014-01-21 Citrix Systems, Inc. Systems and methods for communicating a lossy protocol via a lossless protocol
US9219579B2 (en) 2004-07-23 2015-12-22 Citrix Systems, Inc. Systems and methods for client-side application-aware prioritization of network communications
US8914522B2 (en) 2004-07-23 2014-12-16 Citrix Systems, Inc. Systems and methods for facilitating a peer to peer route via a gateway
US8351333B2 (en) 2004-07-23 2013-01-08 Citrix Systems, Inc. Systems and methods for communicating a lossy protocol via a lossless protocol using false acknowledgements
US8363650B2 (en) 2004-07-23 2013-01-29 Citrix Systems, Inc. Method and systems for routing packets from a gateway to an endpoint
US8897299B2 (en) 2004-07-23 2014-11-25 Citrix Systems, Inc. Method and systems for routing packets from a gateway to an endpoint
US8892778B2 (en) 2004-07-23 2014-11-18 Citrix Systems, Inc. Method and systems for securing remote access to private networks
US8700695B2 (en) 2004-12-30 2014-04-15 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP pooling
US8856777B2 (en) 2004-12-30 2014-10-07 Citrix Systems, Inc. Systems and methods for automatic installation and execution of a client-side acceleration program
US8549149B2 (en) 2004-12-30 2013-10-01 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP multiplexing
WO2006074072A3 (fr) * 2004-12-30 2006-12-07 Citrix Systems Inc Systemes et procedes de mise a disposition de techniques d'acceleration cote client
US8706877B2 (en) 2004-12-30 2014-04-22 Citrix Systems, Inc. Systems and methods for providing client-side dynamic redirection to bypass an intermediary
US8954595B2 (en) 2004-12-30 2015-02-10 Citrix Systems, Inc. Systems and methods for providing client-side accelerated access to remote applications via TCP buffering
US7810089B2 (en) 2004-12-30 2010-10-05 Citrix Systems, Inc. Systems and methods for automatic installation and execution of a client-side acceleration program
US8788581B2 (en) 2005-01-24 2014-07-22 Citrix Systems, Inc. Method and device for performing caching of dynamically generated objects in a data communication network
US8848710B2 (en) 2005-01-24 2014-09-30 Citrix Systems, Inc. System and method for performing flash caching of dynamically generated objects in a data communication network
WO2007073328A3 (fr) * 2005-12-22 2007-08-16 Ericsson Telefon Ab L M Noeud de traitement de reseau et procede de manipulation de paquets
US8499057B2 (en) 2005-12-30 2013-07-30 Citrix Systems, Inc System and method for performing flash crowd caching of dynamically generated objects in a data communication network
US8301839B2 (en) 2005-12-30 2012-10-30 Citrix Systems, Inc. System and method for performing granular invalidation of cached dynamically generated objects in a data communication network
US8255456B2 (en) 2005-12-30 2012-08-28 Citrix Systems, Inc. System and method for performing flash caching of dynamically generated objects in a data communication network
WO2009079320A3 (fr) * 2007-12-18 2009-10-08 Ibiquity Digital Corporation Procédé de diffusion en continu au moyen d'un service de données sur un sous-système de liaison radio
WO2009079320A2 (fr) * 2007-12-18 2009-06-25 Ibiquity Digital Corporation Procédé de diffusion en continu au moyen d'un service de données sur un sous-système de liaison radio
US9872066B2 (en) 2007-12-18 2018-01-16 Ibiquity Digital Corporation Method for streaming through a data service over a radio link subsystem

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