| Klara Nahrstedt and Jonathan M. Smith. The QoS Broker. IEEE Multimedia Magazine, 2(1):53--67, 1995. |
....Finally, in section 6, an evaluation of a proof of concept prototype implementation of a video on demand system, which validates the viability of the proposed approach, is provided. 2.0 Motivation 2. 1 Guaranteed Approach In guaranteed QoS management approaches, such as those presented in [Campbell94, Nahrstedt95], users specify the acceptable levels of operation for a given application. For example, for a video application the user may specify the acceptable and desired frame rate. Then a special entity, a QoS manager, computes the required system 4 resources to satisfy the specified levels of operation. ....
Nahrstedt, K.and Smith, J. (1995) "QoS Broker" IEEE Multimedia Magazine 2(1), pp 53 - 67. 23
....this assumption boundary is usually of little consequence to the router s forwarding behavior. Changes in assumptions, however, are exactly why network administrators install firewalls at trust boundaries, Network Address Translation (NAT) 26] boxes at address space boundaries, QoS brokers [20] at service model boundaries, transcoders and caches at performance boundaries, and so on. One possible response to recognizing that the Internet consists of a collection of logical regions (each of which consists of one or more physical networks) is to add a new layer to the Internet ....
K. Nahrstedt and J. Smith. The QoS Broker. IEEE Multimedia Magazine, 2(1):53--67, Spring 1995.
....systems, Quality of Service (QoS) is usually defined as a set of service requirements to be met by the network while transporting a data flow . The ISO standard defines QoS as a concept for specifying how good the offered networking services are. Usually QoS is defined by a set of parameters [5, 12]. Most of the developments in the area of quality of service support have occurred in the context of individual research areas. There has been considerable progress in the separate areas of distributed object computing, operating systems, transport systems and multimedia networking [2, 4, 5, 8, ....
K. Nahrstedt and J.M Smith. The QoS Broker. IEEE Multimedia Magazine, pages 53--67, Spring 1995.
....requests. In [5] a notion of quality of service is proposed with respect to the content. However, there is not support for any notion of quality of service with respect to resource usage, throughput or response time. 5. 2 Quality of service in Distributed Systems The notion of quality of service [21] has been studied in great detail within the context of networking [21] and multimedia [24] The focus of work here has been on developing varying level of services (including low level notions such as number of bytes second to high level notions such as jitter free play of images etc. and on ....
....to the content. However, there is not support for any notion of quality of service with respect to resource usage, throughput or response time. 5. 2 Quality of service in Distributed Systems The notion of quality of service [21] has been studied in great detail within the context of networking [21] and multimedia [24] The focus of work here has been on developing varying level of services (including low level notions such as number of bytes second to high level notions such as jitter free play of images etc. and on developing algorithms for scheduling CPU, memory and networking resources ....
Nahrestedt, K., and Smith, J. M. The QoS Broker. IEEE MultiMedia Magazine (Spring 1995), 53--67.
....not too distant future, user applications will have fine grain control over their resource allocations. The broad concept of using middleware software objects for distributed resource management is immediately appealing and has been conceived for some time, such as the QoS broker architecture in [8]. Darwin [3] is one recent system building effort that employs such an architecture at the high level. While our work and Darwin share some common goals of robust and adaptive network computing, the two works are built on software infrastructures that are designed differently and have different ....
Klara Nahrstedt and Jonathan M. Smith. The QoS broker. IEEE Multimedia Magazine, 2(1):53--67, Spring 1995.
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Klara Nahrstedt and Jonathan M. Smith. The QoS Broker. IEEE Multimedia Magazine, 2(1):53--67, 1995.
....state of the entire system and is in a position to make decisions that will enable the efficient use of resources. The broker paradigm has been successfully explored before in our laboratory for mapping application Quality of Service to shared resource environments such as computer networks [19]. Most applications can be put into general groups (such as editor, browser, compiler etc. each of which have different resource requirements and priorities. For example, a text editor has very different resource needs from a web browser. We plan to exploit these differences by using the broker ....
K. Nahrstedt and J. M. Smith, The QoS Broker, IEEE Multimedia Magazine, 2(1), pp. 53--67, Spring 1995.
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