M. Diaz, K. Drira, A. Lozes, C. Chassot, "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed Networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... VAT, IVS, WB, etc) have their own transmission control which ALFred, an ALF ILP Protocol Compiler for Distributed Application Automated Design.11 is integrated to the application and use a UDP over IP based communication support (not reliable, not connected) Diaz clearly synthesized the problem [Diaz95] by a three axes model to characterize multimedia applications (figure 3) Reliability, ordering, and time are the three dimensions that characterize a distributed application. We can see on that figure that the protocols we use today are delimitating the same plan. Multimedia application would ....

....a distributed application. We can see on that figure that the protocols we use today are delimitating the same plan. Multimedia application would need protocols that can be anywhere in the cube defined by the three dimensions. Figure 3. Application characterization with three dimensions [Diaz95] To obtain a fine grain classification of end to end transmission control protocols, we have decomposed transmission control protocols in independent functionalities (e.g acknowledgment, flow control, retransmission, etc) Functionalities and mechanisms are selected and associated to the ....

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M. Diaz, K. Drira, A. Lozes, and C. Chassot. On the Definition and representation of the Quality of Service for Multimedia Systems. Proceedings of the IFIP High Performance Networking Conference. Palma (Spain). September 1995.

....with the operation of the Synthesis Engine. 1.7 Specifying Protocol Requirements A formal specification is required to map the specification of the application s requirements into the operation of the communication protocol used. The Application Requirements Specification has been defined in [27] as a three tuple consisting of ordering, reliability and timing. Figure 1.9 illustrates this. Reliability Order 1 0 1 Timing email UDP Audio Player Credit Card Verification TCP File Transfer Figure 1.9: The Three Axes of QoS Required by Multimedia Applications. The requirements of ....

....23 plication in order, in partial order, or whether out of order delivery is permitted. The reliability constraint specifies the guarantee that transmitted data will eventually arrive at the destination. The timing constraint specifies the minimum and maximum acceptable transmission delays [27]. A number of schemes exist that allow these requirements to be specified. Methods include using language techniques such as SDL (Specification Description Language) 54] or petri nets [4] Figure 1.10 gives an example of a petri net of the JPEG player developed in [28] SpecQuant MCU 1 MCU 2 ....

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M. Diaz, K. Drira, A. Lozes, and C. Chassot, "Definition and representation of the quality of service for multimedia systems," in High Performance Networking, 1995. submitted.

....rate flow control) Data delivering order of sequence The application level QoS is defined at the application design step. The application QoS engine will be able to select tailored end to end control functions and mechanisms. Approach for this application QoS engine could be the one described in [Diaz95] or [Diot95] Both approaches use formal descriptions of the application (e.g. Petri nets and ESTEREL descriptions) to automatically bind end to end control mechanisms to the application. These mechanisms are based on: Classic transport protocols (i.e TCP, UDP, XTP) in [Diaz95] An application ....

....one described in [Diaz95] or [Diot95] Both approaches use formal descriptions of the application (e.g. Petri nets and ESTEREL descriptions) to automatically bind end to end control mechanisms to the application. These mechanisms are based on: Classic transport protocols (i. e TCP, UDP, XTP) in [Diaz95]. An application can choose different protocols (with different QoS) to transmit data with different requirements. End to end control modules (i.e. flow control, rate control, ordering, retransmission, etc. which are integrated to the application specification in a user level implementation. ....

M. Diaz, K. Drira, A. Lozes, C. Chassot. "Definition and Representation of the Quality of Service for Multimedia Systems ". IFIP International Conference on High speed Networks. Palma (Spain). September 1995.

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M. Diaz, K. Drira, A. Lozes, C. Chassot, "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed Networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995

....for text like communication. Moreover, one can mention that the use of a reliable service would imply transmission latency, inconsistent with an acceptable high speed video distributed application. Addressing this point, most recent research led to either an extension of the QoS concept [18, 34] or to the proposal of new communication architectures [19 25] As far as this latter point is concerned, two kinds of architecture have been developed : the first provides its users with a given set of service profiles, each of them being able to handle requirements of a specific data flow. ....

M. Diaz, K. Drira, A. Lozes, C. Chassot. "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995.

....as defined by the maximum value of the TSPNs. This problem has no solution when a best effort transport protocol is used. The next part will show how a partial order transport protocol is able to solve it. 6.2. A partial order transport solution A partial order transport service [AME94] CHA95] [DIA95] is a transport which aims to deliver objects sent on one or several connections, following a given order. This order is any order between the total order (TCP) or no order (UDP) and can be expressed as a serial parallel composition of objects (this order being for instance the one described by ....

M. Diaz, K. Drira, A. Lozes, C. Chassot, "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed Networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995

....Current communication protocols operating as intermediate between DMS and the communication network are not capable of supporting DMS communication requirements. This inadequacy is particularly present on high protocol layers In this context, the Application Level Framing [3] and the POC concepts [1, 4] have been proposed. 2. The POC service The service POC [4] supports the notion of QoS, which is characterized by two parameters: the order o and the reliability r. A specification, S, of a POC service, can be seen as an area covering all the accepted service deliveries. No order No ....

....DMS and the communication network are not capable of supporting DMS communication requirements. This inadequacy is particularly present on high protocol layers In this context, the Application Level Framing [3] and the POC concepts [1, 4] have been proposed. 2. The POC service The service POC [4], supports the notion of QoS, which is characterized by two parameters: the order o and the reliability r. A specification, S, of a POC service, can be seen as an area covering all the accepted service deliveries. No order No reliability No order Total reliability Total Order No reliability ....

[Article contains additional citation context not shown here]

M. Diaz, K. Drira, A. Lozes , C. Chassot, " On the definition and representation of the quality of service for multimedia systems", 6 th IFIP International Conference on High Performance Net.working (HPN'95), Spain, Sep. 1995.

....a data text like communication. Moreover, one can mention that the use of a reliable service would imply transmission latency, inconsistent with an acceptable high speed video distributed application. Addressing this point, most recent research works led to either an extension of the QoS concept [18, 34] or to the proposal of new communication architectures [19 25] As far as this latter point is concerned, two kinds of architecture have been developed : the first one provides its users with a given set of service profiles, each of them being able to handle requirements of a specific data ....

M. Diaz, K. Drira, A. Lozes, C. Chassot. "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995.

No context found.

M. Diaz, K. Drira, A. Lozes, C. Chassot, "Definition and representation of the quality of service for multimedia systems", 6th International conference on high speed Networking, HPN'95, Palma de Mallorca (Balearic Islands), Spain, September 11-15, 1995

No context found.

Diaz M., Drira K., Lozes A., Chassot C., "Definition and Representation of the Quality-of-Service for Multimedia Systems", IFIP International Conference on High Performance Networking (HPN'96). Palma (Spain), September 1995.

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