B. Kerherve, A. Vogel, G. Bochmann, R. Dssouli, J. Gecsei and A. Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 1-19,1994  Home/Search   Document Not in Database   Summary   Related Articles   Check

....uses more resources than necessary (inefficient) A client system may not have sufficient buffers available to receive and present a document as described in its presentation scenario. In such a case, the user should be informed and be given the option to change the way the material is presented [Kerherve 94] or to refuse presentation completely. By organizing the reception of data, it may be possible to achieve optimal buffer utilization in the reception and presentation process. Optimal use of resources in client devices ultimately makes such devices less costly. e.g. cheaper set top boxes could ....

B. Kerherve, A.Vogel, G.v.Bochmann, R.Dsoulli, A.Hafid, On distributed multimedia presentational application: functional and computational architecture and QoS Negotiation, procs. 4th. int. workshop of Protocols for high speed networks, Vancouver, 1994.

....during a sessions lifetime. For example, a QoS requirement may change during an application session due to changed user requirements or the fact that the negotiated parameters cannot be maintained due to network congestion. A general approach for QoS negotiation and renegotiation is discussed in [33]. 2.3 Semantics of QoS Degree of Commitment The semantics of QoS parameters are given by the degree of commitment of the service provider. Generally, there are two extreme QoS semantics [18] Best effort QoS: represent the weakest degree of commitment. All parties use their best efforts to ....

Kerherve, B., Vogel, A., Bochmann, G. v., Dssouli, R., Gecsei, J., Hafid, A.: "On Distributed Multimedia Presentational Applications: Functional an Computational Architechture an QoS Negotiation", in: Proc. of 4th Int. IFIP Workshop on Protocols for High-Speed Networks, Chapman & Hall, London, 1994, pp. 1-17

....applications, e.g. video on demand [Rowe 93] and news on demand [Miller 93] conversational applications, e.g. video phone systems, or having both aspects, e.g. computer supported cooperative work [Karmouch 93, William 92] 2.1.1. Presentational applications Presentational applications [Kerherve 94] take the form of MM information digitally stored in one or more high capacity storage devices (server computers) Users can retrieve MM information in real time from MM servers over a broadband network onto their display devices. In a video on demand system, customers have the possibility to ....

B. Kerherve, A. Vogel, G. Bochmann, R. Dssouli, J. Gecsei and A. Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 1-19,1994

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B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, High Speed Networks Conference, Vancouver, Canada, August 1994

....QoS accounting, QoS related security and QoS termination. Most of existing negotiation protocols [ISO N831, ISO 6.92, DAN93, MIL92, MET92, FER92] concerns only the communication quality in terms of QoS parameters such as delay and jitter. Even application to application negotiation protocols [NAH93a,NAH93b, KAL94, KER94] focus only on the establishment of an agreement between the parties with respect to the application QoS parameters. We think that such a view of negotiation for distributed MM applications is incomplete and does not take benefit from the advantages of the distributed nature of the system. Indeed ....

....the system components that support the service functionalities, e.g. compression decompression, before starting the QoS negotiation. A negotiation protocol has been developed to take into account the service functionalilities taking remote access to remote database application as a case study [KER94, HAF94a]. However the proposed protocol does not distinguish between the service negotiation and the QoS negotiation. Furthermore it does not take into account the heterogeneity of the system and is very restrictive while dealing with service negotiation. For example when the user site does not support ....

[Article contains additional citation context not shown here]

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, High Speed Networks Conference, Vancouver, Canada, August 1994

....has been proposed to improve the information given to the users by the network when a connection request is rejected. Such improvement is closely related to the characteristics of the Tenet protocol suite, e.g. admission control tests. Also application to application negotiation protocols [Kal 94, Ker 94, Nah 95, Taw 94] focus only on the establishment of an agreement between the parties with respect to the application QoS parameters. More generally, the service model of the existing negotiation approaches provides the user with the QoS that can be supported at the time the service request is ....

....of a given QoS parameter, and (2) a weight to each QoS parameter. The numerical values should correspond to the quality of the different instances of a given QoS parameter, while the weights must indicate the importance of the different QoS parameters. For example, in a video on demand system [Ker 94] the parameters used to specify, at the user level, the quality of video are: color, frame rate, and display size; an instance of color can take the values color, gray, or black white, an instance of frame rate can take TV rate, reduced rate, or frozen rate, while an instance of display size ....

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 1-19, 1994

....has been proposed to improve the information given to the users by the network when a connection request is rejected. Such improvement is closely related to the characteristics of the Tenet protocol suite, e.g. admission control tests. Also application to application negotiation protocols [Kal 94, Ker 94, Nah 95, Taw 94] focus only on the establishment of an agreement between the parties with respect to the application QoS parameters. More generally, the service model of the existing negotiation approaches provides the user with the QoS that can be supported at the time the service request is ....

....of a given QoS parameter, and (2) a weight to each QoS parameter. The numerical values must indicate the importance of the different instances of a given QoS parameter, while the weights must indicate the importance of the different QoS parameters. For example, in a video on demand system [Ker 94] the parameters used to specify, at the user level, the quality of video are: color, frame rate, and display size; an instance of color can take the values color, gray, or black white, an instance of frame rate can take TV rate, reduced rate, or frozen rate, while an instance of display size ....

[Article contains additional citation context not shown here]

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 1-19, 33

....into presentational, e.g. video on demand [Rowe 93] and news on demand [Miller 93] conversational applications, e.g. video phone systems, or having both aspects, e.g. computer supported cooperative work [Karmouch 93, William 92] 2.1.1. Presentational applications Presentational applications [Kerherve 94] take the form of MM information digitally stored in one or more high capacity storage devices (server computers) Users can retrieve MM information in real time from MM servers over a broadband network onto their display devices. In a video on demand system, customers have the possibility to ....

B. Kerherve, A. Vogel, G. Bochmann, R. Dssouli, J. Gecsei and A. Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 1-19,1994

....ones. Given the huge quantity of information to be accessed, e.g. 30 Mbits a second for uncompressed video, and the severe temporal constraints guarantees required by continuous media, the file system object(s) must guarantee a minimum bandwidth throughput and a maximum delay to retrieve MM data [KER94]. 3) Transport object: Protocol stack processing may introduce a non desirable delay and jitter, e.g. error control and segmentation reassembling. Protocol architectural performance issues have been well studied in [FEL93] In [NEU93] it was reported that parallel protocol processing is required ....

....user interface. SetQoSParameters(String identifier, UserQoSParametersClass QoS Parameters) supports the local negotiation the QoS parameters QoS parameters of the object identified by identifier. The implementation of such a function corresponds to the QoS negotiation protocol presented in [KER94, HAF94a]. ShowExample(UserQoSParametersClass QoS parameters) permits to display the example stored locally with QoS parameters. 4.2 Mapping Relations Before defining the mapping functions to map user QoS parameters to the underlying system parameters, we must raise the technical issues related to the ....

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, High Speed Networks Conference, Vancouver, Canada, August 1994

....without affecting the existing ones. Given the huge quantity of information to be accessed, e.g. 30 Mbits a second for uncompressed video, and the severe temporal guarantees required by continuous media, the file system(s) must guarantee a minimum throughput and a maximum delay to retrieve MM data [16]. 3) Transport entity: Protocol stack processing may introduce a non desirable delay and jitter, e.g. through error control and segmentation reassembling. Protocol architectural performance issues have been well studied in [17] In [18] it was reported that parallel protocol processing is ....

....those aspects of QoS requirements and the flows of QoS data across service boundaries and inside (N) subsystems that are related to the operation of layer protocols. More generally, for each component of the system, e.g. human user or the transport system, a set of QoS parameters must be defined [16]. Such parameters must be specified in a language understandable to the corresponding components. As an example, it is not acceptable to present to the human user the parameter jitter, since it is not meaningful to him her. ConseQoS Specification QoS mapping QoS negotiation Resource Reservation ....

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B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multi- 12 media Presentational Applications: Functional and Computational Architecture and QoS negotiation, High Speed Networks Conference, Vancouver, Canada, August 1994

....without affecting the existing ones. Given the huge quantity of information to be accessed, e.g. 30 Mbits a second for uncompressed video, and the severe temporal guarantees required by continuous media, the file system(s) must guarantee a minimum throughput and a maximum delay to retrieve MM data [KER94]. 3) Transport entity: Protocol stack processing may introduce a non desirable delay and jitter, e.g. through error control and segmentation reassembling. Protocol architectural performance issues have been well studied in [FEL93] In [NEU93] it was reported that parallel protocol processing is ....

.... following related work was studied: XTP (express transport protocol) MIL92] tenet approach [FER90, FER92, PAR93] RTP (real time transport protocol) SCH92] OSI95 [DAN92] BERKOM multimedia transport service [BOC93] Heidelberg Transport System [DEL93] and ST II [TOP90] Based on this study [KER94], we defined a transport system QoS interface that offers the QoS parameters shown in Table 4. The first four QoS parameters are used in the majority of comparable approaches. The guarantee parameters allows to specify whether the parameters throughput, delay, and jitter are supported by best ....

[Article contains additional citation context not shown here]

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, High Speed Networks Conference, Vancouver, Canada, August 1994

....can be classified into presentational, e.g. video ondemand [Row 93] and news on demand [Mil 93] conversational applications, e.g. video phone systems, or having both aspects, e.g. computer supported cooperative work [Kar 93, Wil 92] 1.1. 1 Presentational applications Presentational applications [Ker 94] take the form of MM information digitally stored in one or more high capacity storage devices (server computers) Users can retrieve MM information in real time from MM servers over a broadband network onto their display devices. In a video ondemand system, customers have the possibility to ....

B.Kerherve, A.Vogel, G.Bochmann, R.Dssouli, J.Gecsei and A.Hafid, On Distributed Multimedia Presentational Applications: Functional and Computational Architecture and QoS negotiation, in Proceedings of High Speed Networks Conference, pp. 119, 1994

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