D. Ferrari, "Delay Jitter Control Scheme for Packet-switching Internetworks", Computer Communications, vol. 15, n 6, pp. 367-373, julho/agosto de 1992.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....descrevem, respectivamente, mecanismos de transporte e arquitetura de software para sistemas distribudos. Uma arquitetura para sistemas multimdias em tempo real, na qual pontos de sincronizao so utilizados para sincronizar fluxos relacionados, descrita por Nicolaou [Nico90] No esquema de Ferrari [Ferr92], descrito um mecanismo distribudo para controlar a variao do atraso (jitter) em redes que tm os comutadores e as operaes de comutao muito complexos. O modelo de Little e Ghaffor [LiGh91] utiliza Redes de Petri para a Composio de Objetos (OCPNs) a fim de especificar as relaes temporais entre os ....

D. Ferrari, "Delay Jitter Control Scheme for Packet-switching Internetworks", Computer Communications, vol. 15, n 6, pp. 367-373, julho/agosto de 1992.

....a common goal. Substantial effort has been directed toward the development of regulation and scheduling schemes for real time applications. Examples of regulation and scheduling schemes for real time applications include : D EDD (Delay Earliest Due Date) 1] JEDD (Jitter Earliest Due Date) [2], 3] HRR (Hierarchical Round Robin) 4] S G (Stop and Go Queuing) 5] WFQ (Weighted Fair Queuing) 6] PGPS (Packet Generalized Processor Sharing) 7] RCSP (Rate Controlled Static Priority) 8] LIT (Leave In Time) 9] MRTS (Multi Rate Traffic Shaping) 10] VC (Virtual Clock) 11] The ....

D. Ferrari. "Delay Jitter Control Scheme for Packet-Switching Internetwork". Computer Communications, 15(6):367--373, July-August 1992.

....the present paper. Substantial effort has been directed toward the development of regulation and scheduling schemes for realtime applications. Examples of regulation and scheduling schemes for real time applications include : D EDD (Delay Earliest Due Date) 1] J EDD (Jitter Earliest Due Date) [2]; HRR (Hierarchical Round Robin) 3] S G (Stop and Go Queuing) 4] WFQ (Weighted Fair Queuing) 5] PGPS (Packet Generalized Processor Sharing) 6] RCSP (Rate Controlled Static Priority) 7] LIT (Leave In Time) 8] MRTS (Multi Rate Traffic Shaping) 9] VC (Virtual Clock) 10] The traffic ....

D. Ferrari. "Delay Jitter Control Scheme for PacketSwitching Internetwork". Computer Communications, 15(6):367--373, July-August 1992.

....The notion of synchronization can be related to the tasks of coordination, scheduling, and presentation of multimedia objects according to a single time line. Generally,themultimedia synchronization maybeof either of two approaches: hop by hop or end to end.In the hop by hop approach[8], each hop takes responsability for reconstructing the flow pattern. This is done by buffering the objects, updating timing information embedded in each object, and then delivering the objects to the next downstream hop. One issue with the hop by hop approach is the increasing protocol ....

....[9, 7] at the network layer. The existing control mechanism provides guarantee that the difference between the delays experienced byany two packets on the same connection does not exceed the predetermined value. In implementing this algorithm, most authors propose to use the global time reference [5,6,12, 8]. The work presented in this paper differs from the ones reported in the literatures. Here, we focus on the issue of preserving temporal signature of multimedia objects in a higher layer. We introduce a simple flow conservation algorithm that allows the remote application layer to receive the same ....

D. Ferrari, Delay Jitter Control Scheme for Packet-Switching Internetwork, Computer Communications, Vol 15 N ffi 6, (July/august 1992)

....is a guarantee that delay (or delay jitter) will be less than the bound, while a statistical bound is a guarantee that the probability that delay (or delay jitter) will exceed some threshold is less than the bound. In addition, he proposes a general scheme for implementing bounds on delay jitter [8]. Such bounds are among those commonly referred to as Quality of Service (QOS) guarantees. A good survey of networks and protocols for supporting general QOS guarantees is given in [5] Here, I will highlight a few of these networks and protocols that support QOS guarantees on delay and delay ....

Ferrari, D., 1992. Delay Jitter Control Scheme For Packet-Switching Internetworks, Computer Communications, Vol. 15, No. 6, (Jul/Aug), pp. 367-373.

.... of jitter used by past researchers have included co variance (ratio of the standard deviation over the mean) 9] absolute deviation (does not square the distance from the mean) 26] and number of gaps (that occur in the video playout after buffering) 28, 11] and variance or standard deviation [8, 25, 21, 2]. 10 0 50 100 150 200 250 300 350 0 5 10 15 20 25 Interarrvial Time (ms) Frame Figure 8: Java Jitters. This figure depicts the interarrival times between playout of video frames at the client. The vertical axis is the time between frame playout in milliseconds. The horizontal axis ....

Domenico Ferrari. Delay Jitter Control Scheme for Packet-Switching Internetworks. Computer Communications, 15(6):367 -- 373, July 1992.

....events. An event may be receiving an update packet or displaying a rendered video frame on the screen. The quantity and timing of these events give us measures that affect application quality. Based on previous multimedia application research [SW93, AFKN95, Roy94, IKK93, PSR93, RS94, MS94, Fer92, KN82, TJ94, Par94, FM76] we have identified three measures that determine quality for most multimedia applications: ffl Latency. The time it takes information to move from the server through the client to the user we call latency. Latency decreases the effectiveness of applications by making ....

....second have been found to be minimal for doing effective work. The human eye blends discrete images into motion at about 12 frames per second. Motion picture quality video is about 30 frames per second. Methods to ameliorate the effects of jitter have been explored by many researchers [SJ95, RS94, Fer92, CHR97] The tradeoff between buffering and jitter has also been explored [KN82, SR95] There is no one size fits all method for determining end to end multimedia performance. Previous research has defined metrics for components fundamental to most multimedia applications [WS95] However, while ....

Domenico Ferrari. Delay jitter control scheme for packet-switching internetworks. Computer Communications, 15(6):367--373, July 1992.

....there is already a remarkable amount of related work targeted on focused problems. This work is of high interest for us, especially those addressing, synchronization in general, e.g. 18, 27, 28] and especially for distributed environments, e.g. 22, 23, 24, quality of service issues, e.g. [9, 19], and scheduling, e.g. 3, 6, 12] Regarding the classification of synchronization techniques proposed in [8] our approach belongs to the local schemes since it does not implement network protocol based synchronization. Currently, it is not entirely saddled yet, however, it is similar to the one ....

Ferrari, D.:"Delay Jitter Control Scheme for Packet-Switching Internetworks", in IEEE Computer Communications, Vol. 15, No. 6, Jul./Aug. 1992, pp. 367-373

....typically associate deadlines with cells and attempt to provide for the target QoS metric by scheduling service in order of increasing deadlines. Examples of regulation and scheduling schemes for real time applications include : D EDD (Delay Earliest Due Date) 1] J EDD (Jitter Earliest Due Date) [2], 3] HRR (Hierarchical Round Robin) 4] S G (Stop and Go Queuing) 5] WFQ (Weighted Fair Queuing) 6] PGPS (Packet Generalized Processor Sharing) 7] RCSP (Rate Controlled Static Priority) 8] LIT (Leave In Time) 9] MRTS (Multi Rate Traffic Shaping) 10] VC (Virtual Clock) 11] The ....

D.Ferrari. "Delay Jitter Control Scheme for Packet-Switching Internetwork". Computer Communications, 15(6):367--373, July-August 1992.

....in the present paper. Substantial effort has been directed toward the development of regulation and scheduling schemes for realtime applications. Examples of regulation and scheduling schemes for real time applications include : D EDD (Delay Earliest Due Date) 1] J EDD (Jitter Earliest Due Date) [2]; HRR (Hierarchical Round Robin) 3] S G (Stop and Go Queuing) 4] WFQ (Weighted Fair Queuing) 5] PGPS (Packet Generalized Processor Sharing) 6] RCSP (Rate Controlled Static Priority) 7] LIT (Leave In Time) 8] MRTS (Multi Rate Traffic Shaping) 9] VC (Virtual Clock) 10] The traffic ....

D. Ferrari. "Delay Jitter Control Scheme for PacketSwitching Internetwork". Computer Communications, 15(6):367--373, July-August 1992.

....synchronization among the related streams by inserting synchronization points in each individual stream. In [5] Steinmentz introduced the concept of Logic Data Unit (LDU) A continuous media data stream is viewed as a sequence of LDUs. The synchronization control is performed on a LDU. In [6], Ferrari proposes a delay jitter control scheme that insures media synchronization as long as a bound on delay can be guaranteed and that the source and destination clocks are kept in synchrony. Every node on the transmission path in the network is involved in the synchronization control by ....

D. Ferrari, "Delay jitter control scheme for packetswitching internetworks", Computer Communications, vol.15, no.6, July / Aug. 1992, pp.367-373

.... and well researched [IKK93, Roy94, DCJ93] Similarly, there is a clear relationship between packet loss and multimedia quality deterioration [AFKN95, MS94, SW93, HSK98, PHH98, GKL 98] Methods to ameliorate the effects of jitter have been explored by many researchers [SJ95, RKTS94, Fer92] There has also been research done in classifying perceptual quality assessment techniques [WS98] However, to the best of our knowledge, there has been no measurement of the impact of jitter on the quality of packet video from the user perspective. Similarly, there have not been any careful ....

Domenico Ferrari. Delay jitter control scheme for packet-switching internetworks. Computer Communications, 15(6):367--373, July 1992.

....delays. This is the approach used in computer based conferencing systems based on networks that provide isochronous services (such as ATM) Another approach minimizes delay jitter by using resource reservation to provide guaranteed bounds on delay and delay jitter. For example, Ferrari [1] presents a scheme in which clients requiring real time communication services specify their traffic characteristics and performance requirements. In response, the system reserves enough resources at each node on the network (e.g. processor capacity, buffer space) to guarantee the performance ....

Ferrari, Domenico. "Delay Jitter Control Scheme For Packet-Switching Internetworks", Computer Communications, Vol. 15, No. 6, Jul./Aug. 1992, pp. 367-373.

....synchronization among the related streams by inserting synchronization points in each individual stream. In [5] Steinmentz introduced the concept of Logic Data Unit (LDU) A continuous media data stream is viewed as a sequence of LDUs. The synchronization control is performed on a LDU. In [6] , Ferrari proposes a delay jitter control scheme that insures media synchronization as long as a bound on delay can be guaranteed and the source and destination clocks are kept in synchrony. Every node on the transmission path in the network is involved in the synchronization control by ....

D. Ferrari, "Delay jitter control scheme for packet-switching internetworks", Computer Communications, vol.15, no.6, July / Aug. 1992, pp.367-373

....(ST II) Top90] and the Session Reservation Protocol (SRP) AHS90] are all examples of reservation based protocols. A survey of many of CHAPTER 2. RELATED WORK 11 the protocols for real time communication in packet switched networks can be found in [AKRS94] The Tenet protocol suite [BKTZ94, Fer92, FBZ92] aims to provide connection specific QoS, divided into the three priority levels mentioned before. At each node, traffic is processed by multi class earliest due date scheduling, with class priority decreasing from deterministic to best effort traffic [DV90] Admission control is based ....

D. Ferrari. Delay jitter control scheme for packet-switching internetworks. Computer Communications, pages 367--373, Aug. 1992.

....This is the approach used in computer based conferencing systems based on networks that provide isochronous services (such as ATM) Another approach is to minimize delay jitter by reserving resources in the network so as to provide guaranteed bounds on delay and delay jitter. For example, Ferrari [1] presents a scheme in which clients requiring real time communication services specify their traffic characteristics and performance requirements. In response, the system reserves sufficient resources at each node on the network (e.g. processor capacity, buffer space) to guarantee the performance ....

Ferrari, D., "Delay Jitter Control Scheme For Packet-Switching Internetworks," Computer Communications, Vol. 15, No. 6 (July/August 1992), pp. 367-373.

.... on a user s perception of an application is well understood and well researched [53, 22, 45, 13] Similarly, there is a clear relationship between data loss and application quality deterioration [2, 40, 37, 49] Methods to ameliorate the effects of jitter have been explored by many researchers [48, 43, 16]. The tradeoff between buffering and jitter has also been explored [31, 47] However, to the best of our knowledge, the effects of high performance workstations, real time priorities and high speed networks on jitter has not been thoroughly investigated. Moreover, the effects of jitter on the ....

....techniques for reducing jitter are done in the context of compensating for the jitter produced by the underlying computer system. There has been a lot of research done on application techniques [15, 46, 35] Controlled frame playout through buffering, in particular, has been well studied [31, 43, 50, 48, 16]. With buffering, transmitted frames are held in memory by the receiver for a period of time. Then, the receiver plays out each frame with a constant latency, achieving a steady stream. If the buffer is made sufficiently large so that it can hold all arriving data for a period of time as long as ....

[Article contains additional citation context not shown here]

Domenico Ferrari. Delay jitter control scheme for packet-switching internetworks. Computer Communications, 15(6):367--373, July 1992.

.... If the streams have different sources, then either a clock synchronization mechanism [9, 16] or a mechanism that emulates a global clock is required [17, 18, 22] In order to guarantee high quality multimedia presentations, real time support from the network and operating system is important [7, 10]. In our work we concentrate on synchronization algorithms that consider best effort environments, for two reasons: first, algorithms designed for non real time environments can also work in real time environments; second, from our experience, there are situations when the real time extensions of ....

D. Ferrari, "Delay Jitter Control Scheme for Packet-Switching Internetwoks", Computer Communications, Vol.15, No.6, pp. 367-373, July/August 1992.

No context found.

D. Ferrari, Delay Jitter Control Scheme for Packet-Switching Internetwork, Computer Communications, Vol. 15 N ffi 6 (July/August 1992)

No context found.

D. Ferrari: "Delay jitter control scheme for packet-switching internetworks", Computer Communications, vol. 15, No. 6, July/August 1992.

No context found.

D. Ferrari, "Delay jitter control scheme for packet-switching internetworks", Computer Communications, vol.15, no.6, July / Aug. 1992, pp.367-373

No context found.

Ferrari, D., 1992. Delay Jitter Control Scheme For Packet-Switching Internetworks, Computer Communications, Vol. 15, No. 6, (Jul/Aug), pp. 367-373.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC