Ott, M., Michelitsch, G., Reininger, D., Welling, G.: An architecture for adaptive qos and its application to multimedia systems design. Special Issue of Computer Communications on Guiding Quality of Service into Distributed Systems (1997)  Home/Search   Document Not in Database   Summary   Related Articles   Check

....1.1 Related Work The use of implicit user hints in resource control has been applied to a wide range of multimedia applications, with each scheme being limited in scope to a specific domain. For example, Kulju et al. 1] investigated user hints in the context of video streaming, while Ott et al. [2] focused on its use within their own 3D landscape. In addition, recent work in collaborative workspaces has investigated how hints may be used in order to dynamically control the use of reliable multicast [3] The work most similar to that presented in this paper is the SCUBA protocol [4] which ....

Ott, M., Michelitsch, G., Reininger, D., Welling, G.: An architecture for adaptive qos and its application to multimedia systems design. Special Issue of Computer Communications on Guiding Quality of Service into Distributed Systems (1997)

....Work The use of implicit user behavior in resource control has been applied to a wide range of multimedia applications, with each scheme being limited in scope to a specific domain. For example, Kulju et al. 6] investigated user behavior in the context of video streaming, while Ott et al. [10] focused on its use within their own 3D landscape. In addition, recent work in collaborative workspaces has investigated how hints may be used in order to dynamically control the use of reliable multicast [11] The work most similar to that presented in this paper is the SCUBA protocol [1] which ....

M. Ott, G. Michelitsch, D. Reininger, and G. Welling. An architecture for adaptive qos and its application to multimedia systems design. Special Issue of Computer Communications on Guiding Quality of Service into Distributed Systems, 1997.

....s by an additive amount. While other functions would undoubtedly produce satisfactory results we have adopted the logarithmic function as the basis of the work reported here. We believe it to be 11 consistent in general with the subjective experiments that have been performed by others ([2, 9]) The parameterised form of the logarithmic function used here is: s(x) a:ln(bx c) where: a = 1 p 10 ; b = e 1 a 1 I M ; and c = I Me 1 a I M : This has a single parameter p which can be interpreted as a sensitivity parameter in the sense that p controls the sensitivity ....

M. Ott, G. Michelitsch, D. Reininger, and G. Welling. An architecture for adaptive QoS and its application to multimedia system design. Computer Communications Special Issue on Guiding Quality of Service into Distributed Systems, 1997. http://ccrlwww.nj.nec.com/key/97-R-005/publication/abstract2.html.

....presented to him with the knowledge of the grade of service supplied by the lower layers. Application models that support adaptivity have been proposed in [8, 9, 10] An application model suitable for wireless ad hoc networks can be found in [2] Architectural considerations are found in [11, 12, 13]. Wireless and embedded computing technologies are expected to become a basic building block in future networks and inter networks. An increasing number of small size devices will be equipped with wireless communication devices and ad hoc protocols [7, 15, 16] on Bluetooth, 14] on HomeRF, 17] ....

Ott, M.; Michelitsch, G.; Reininger, D.; Welling, G. An architecture for adaptive QoS and its application to multimedia systems design. Computer Communications, vol.21, (no.4), Elsevier, NEC, 10 April 1998. p.334-49.

....layer, both demands placed on the network can be adjusted and user perception may be enhanced. Application models that support adaptivity have been proposed in [6, 7, 8] An application model suitable for wireless ad hoc networks can be found in [2] Architectural considerations are found in [9,10, 11]. We investigate adaptive multimedia application layers that continuously within a session, change their demands from the network based on a periodical end to end feedback. Initially, we present and validate a new hybrid simulator testbed designed to support experiments where multimedia packets ....

Ott, M.; Michelitsch, G.; Reininger, D.; Welling, G. An architecture for adaptive QoS and its application to multimedia systems design. Computer Communications, vol.21, (no.4), Elsevier, NEC, 10 April 1998.

....presented an SNMPbased network management schema using CORBA [7] These results are very significant and can be combined with the CASM presented here. A recent work at NEC C C Research outlines QoS requirements from the user s perspective [11] and suggests a framework to satisfy user requirements [12]. This work is moving towards the direction of application oriented Quality of Service, and its focus is on the mechanism and framework which enable QoS benefits to be achieved from different layers of the network architecture appropriately managing the network resources. An application oriented ....

M. Ott, G. Michelitsch, D. Reininger, G. Welling, "An Architecture for Adaptive QoS and its Application to Multimedia Systems Design, Computer Communications special issue on Guiding QoS into Distributed Systems, 1997

....resource is located in the user s own working environment where possible, or is otherwise geographically closest to that environment. A recent work at NEC C C Research outlines the QoS requirements from the user s perspective [11] and suggests a framework to satisfy the user s requirements [12]. This work is moving towards the direction of application oriented Resource Management, and its focus is on the mechanism and framework which enable QoS benefits to be achieved from different layers of the network architecture appropriately managing the network resources. Along the same lines, ....

M. Ott, G. Michelitsch, D. Reininger, G. Welling, "An Architecture for Adaptive QoS and its Application to Multimedia Systems Design, Computer Communications special issue on Guiding QoS into Distributed Systems, 1997

....establishing the reservation along the new path. Support for Soft QoS guarantees. As hard QoS guarantees are difficult to provide over wireless channels, soft QoS principles provide a meaningful compromise. Especially for application frameworks that can adapt to changes in resource availability [12]. Minimum changes to YESSIR. M YESSIR is an extension of YESSIR and changes to the base protocol should be kept to a minimum. IP header with Router Alert UDP Header HA (src) FA (dest) RTCP Message : Sender Report with Reservation Extension Tunnel Extension : End to End Flow ID X (srcp ....

....PCs running Linux (kernel version 2.2.2) that were configured as routers. The router PCs contained Intel Pentium II processors clocked at 450 MHz. The processing times were calculated using the gettimeofday linux system call. The application scenario consists of a home grown video server[12] sending video through an RTP connection to an MpegTV based client. The results for the first part have been shown in Tables III V. The processing time for the YESSIR refresh messages is about 42 less than for the YESSIR setup message. This can be attributed to the fact that about 40 of the ....

M. Ott, G. Michelitsch, D. Reininger, and G. Welling, "An architecture for adaptive QoS and its application to multimedia systems design," Computer Communications, 21(4):334--349, Feb. 1998.

....the switch. Each source consists of a traffic generator and a shaper. The traffic generator uses actual video traces with UPC renegotiation capability (described below) Dual rate leaky bucket is used for traffic shaping. Both the traffic generator and the shaper are controlled by a QoS controller [18, 3]. The QoS controller communicates to the CAC for UPC 4 If an unhappy connection is allowed to send renegotiation messages frequently, it could overload the CAC and may block other renegotiations. 14 Shaper Controller QoS Traffic Generator CAC Switch Sink Source Source Figure 3: ....

M. Ott, G. Michelitsch, D. Reininger, and G. Welling. An Architecture for Adaptive QoS and its Application to Multimedia Systems Design. Submitted to ACM SIGCOM Journal, 1997.

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M. Ott, G. Michelitsch, D. Reininger, and G. Welling. An architecture for Adaptive QoS and its Application to Multimedia Systems Design. http://www.ccrl.nj.nec.com/papers/97--R005/.

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Ott, M., Michelitsch, G., Reininger, D., Welling, G.: An architecture for adaptive qos and its application to multimedia systems design. Special Issue of Computer Communications on Guiding Quality of Service into Distributed Systems (1997)

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Ott, M.; Michelitsch, G.; Reininger, D.; Welling, G. An architecture for adaptive QoS and its application to multimedia systems design. Computer Communications, vol.21, (no.4), Elsevier, NEC, 10 April 1998. p.334-49.

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M.Ott, G.Michelitsch and D.Reininger and G.Welling, An Architecture for Adaptive QoS and its Application to Multimedia Systems Design, Special Issue of Computer Communications on Building Quality of Service into Distributed Systems.

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M.Ott, G.Michelitsch, D.Reininger and G.Welling, "An Architecture for Adaptive QoS and its Application to Multimedia Systems Design", to appear in Special Issue of Computer Communications on Building Quality of Service into Distributed Systems, C&C Research Laboratories, NEC, USA, August 1997.

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