The ATM Forum, "ATM User-Network Interface Specification,", September 1993. Version 3.0.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....delays, which are mainly data transmissions. This new service will systematically and dynamically allocate available bandwidth to the users by controlling the rate of offered traffic through feedback. To implement such a framework, a closed loop feedback policy has been developed by the ATM Forum [1] operating on a rate oriented basis. A distinguishing feature of ABR sources is their ability to submit cells into the network at a variable but controlled rate, the Allowed Cell Rate (ACR) The ACR is initially set to the Initial Cell Rate(ICR) and is always bounded between the Minimum Cell ....

ATM Forum. ATM User-Network Interface Specification. Version 3.1, September 1994.

....of service for all connections according to their traffic contracts. Therefore, aneasy to t but effective algorithm for monitoring the cell stream from a connection was proposed by the CCITT in Draft Rec. I. 371 [7] and was also adopted as generic cell rate algorithm (GCRA) by the ATM Forum in [3]. Both versions of the monitor algorithm, namely the virtual scheduling algorithm and the continuous state leaky bucket, are equivalent in that sense, that the same cells are rejected accepted. We refer in this paper only to the virtual scheduling algorithm. The peak cell rate of an ATM ....

....outlook on further studies. 2 Analysis of the peak cell rate monitor algorithm 2.1 Description of the algorithm The peak cell rate monitor algorithm is, as mentioned earlier, described in two versions in CCITT Draft Rec. I.371 [7] We refer here to the virtual scheduling algorithm. As described in [3], the algorithm can also be used to monitor the sustainable cell rate together with the corresponding burst tolerance. In this paper, we restrict ourselves to the monitoring of the peak cell rate of an ATM connection. As mentioned already, the peak cell rate is defined as the inverse of the ....

ATM Forum, ATM User-Network Interface Specification, Version 3.0, September 1993.

....(3) use of credit based fiow control to improve the effectiveness of statistical multiplexing in minimizing switch memory. These results have been substantiated by analysis, simulation and implementa tion. 1. Introduction Flow control is essential for asynchronous transfer mode (ATM) networks [1] in providing best effort services, or ABR (Available Bit Rate) services in the ATM Forum terminology. With proper flow control, computer users would be able to use an ATM network in the same way as they have been using conventional LANs, namely, they can use the network at any time without ....

ATM Forum, "ATM User-Network Interface Specification," Version 3.0, Prentice Hall, Englewood Cliffs, New Jersey, 1993.

....(CDV) tolerance. The PCR of an ATM connection is defined as the inverse of the minimum time between the generation instants of two cells from this connection. In addition, the Sustainable Cell Rate (SCR) and the Burst Tolerance can optionally be described (if used, they must be specified together [1], 3] The SCR of an ATM connection is an upper bound on the average cell rate of this connection. It is to be specified only for VBR services, since PCR and SCR are equal for CBR services. By specification of the SCR of a connection, the network operator can allocate less network resources (but ....

....at the Physical Layer Service Access Point (PHY SAP) and the conformance of cell streams according to them is monitored at the private public User Network Interface (UNI) The corresponding reference configuration from CCITT Draft Recommendation I. 371 [2] whichwas adopted bytheATM Forum [1], is depicted in Figure 1. Cells oftraffi streams from different connections are multiplexed together and then pass through a shaper to reduce CDVintroduced bymultiplexing. But after thetraffi shaping, CDVisintroduced again between the PHY SAP and the private public UNI. Since cell stream ....

[Article contains additional citation context not shown here]

ATM Forum, ATM User-Network Interface Specification,Version 3.0, September 1993.

....PCs workstations with commodity Local Area Networking (LAN) Systems Area Networking (SAN) technolo This Research is supported in part by Department of Energy s Grant # DE CF02 01ER25506 and an NSF Grant #EIA 9986052. gies (such as Fast Ethernet [15] Gigabit Ethernet[8] Myrinet [5] ATM [2], and GigaNet [1] Distributed and high performance scientific applications running on such clusters require efficient support for both point to point and collective communication. Frequently used collective communication operations include: barrier, broadcast, all reduce, gather, scatter, etc. ....

ATM Forum. ATM User-Network Interface Specification, Version 3.1, September 1994.

....use of network resources, since for data communications the cell transmission rate can be adjusted according to the current congestion status of the network. These reasons have led to the definition of another service type mainly for data communications, theso Available Bit Rate (ABR) service [1]. To support the ABR service, a closedop congestion control is applied, which is a reactive control mechanism that dynamically regulates the allowed cell transmission rate of each ABR connection using feedback information from the network [4] This mechanism was developed bytheTraffic Management ....

ATM Forum. ATM User-Network Interface Specification. Version 3.1, September 1994.

....degree of knowledge of the system available at the video encoder. We consider a generic system, shown in Fig. 1, where the video encoder emits encoded data to a buffer. This encoded data, or video traffic, is then drained at a variable rate which is monitored at the User Network Interface (UNI) [4]. The UNI monitors the transmitted rate and compares the connection parameters to those negotiated between user and network at the time of connection set up. The network policing functions, if used, can be considered to be implemented at the UNI. Finally, traffic transmitted through the network ....

ATM Forum, ATM User-Network Interface Specification, Version 3.0. Prentice-Hall, 1993.

.... (e.g. due to network congestion) An example of the role of feedback can be seen by considering a generic system, where the video encoder emits encoded data to a buffer and encoded data, or video traffic, is then drained at a variable rate, which is monitored at the User Network Interface (UNI) [27]. This system would be typical of an ATM based interface, but similar methods might be applied under other transport mechanisms. The UNI monitors the transmitted rate and compares the connection parameters to those negotiated between the user and the network 26 at the time of connection set up. ....

ATM Forum, ATM User-Network Interface Specification, Version 3.0. Prentice-Hall, 1993.

....consume to decide whether granting this new connection will degrade the service of already connected sources to the point of violating their respective negotiated QoS. This process is referred to as dimensioning a single VBR video source. The standard specified by the User Network Interface (UNI) [1, 2] envisioned call admission being performed with a set of source parameters, mean, burst (peak rate or (peak ratc) mcan) burst duration and others which may bc de fined by apphcation. However, multiple VBR sources can share common values for parameters such as mean, or peak rate and yet have ....

....when using a to compare two VBR sources, their respective TPMs do not have to be of the same dimension nor use the same transmission rates r [ rl r2 . rk ] 3. EXPERIMENTAL RESULTS We envision an alternative QoS negotiation being performed with TPM rather than those parameters specified in [1, 2]. In this experiment wc demonstrate that cs both from model and simulation possess a greater discriminating ability over other parameters such as u, u q er, and peak rate. These five parameters are assigned to discriminate two hundred different test VBR simulations according to their 99 delay ....

"The ATM Forum." Prentice-Hall, 1993. ATM user- network interface specification, V 3.0.

....prevent the negative impact on the network of sources exceeding their negotiated traffic parameters. While not precluding that other mechanisms are used within the network, we concentrate here on policing functions that are known to the video encoder and are monitored at the user network interface [7]. Policing functions such as leaky bucket (LB) jumping window, sliding window, etc, are commonly used due to their simplicity and efficiency [8, 9] Note that our methods would also be directly applicable to shaping for ITU T defined parameters such as Peak Cell Rate and Sustainable Cell Rate. ....

ATM Forum, ATM User-Network Interface Specification, Version 3.0. Prentice-Hall, 1993.

....Once wc have specified the interface wc can produce models for the video bit rate under the chosen set of rate constraints and use these models to estimate network utilization. Wc thus consider the following scenario which is compatible with the currently specified User Network Interface (UNI) [2, 3]. Video source and network agree upon a set of parameters (including the peak rate of the source) used to describe the connection and monitored by the network. Because monitoring at arbitrary points within the network is more difficult (delay jitter introduces errors in the mea surements and the ....

"The ATM Forum." Prentice-Hall, 1993. ATM user- network interface specification, V 3.0.

No context found.

The ATM Forum, "ATM User-Network Interface Specification,", September 1993. Version 3.0.

No context found.

ATM Forum,`ATM User-Network Interface Specification', Prentice Hall, 1993.

No context found.

ATM Forum,`ATM User--Network Interface Specification', Prentice Hall, 1993.

No context found.

ATM Forum,`ATM User-Network Interface Specification', Prentice Hall, 1993.

No context found.

ATM Forum. ATM User-Network Interface Specification, Version 2.2, June 1991.

No context found.

ATM Forum. ATM User-Network Interface Specification, Version 2.2, June 1991.

No context found.

The ATM Forum, ATM User-Network Interface Specification, Version 2.4, Aug. 5, 1993.

No context found.

ATM Forum, ATM User-Network Interface Specification, Version 3.0, ATM Forum, June 1993.

No context found.

ATM Forum, "ATM User-Network Interface Specification", Prentice Hall, September 1993.

No context found.

The ATM Forum, "ATM User-Network Interface Specification,", September 1993. Version 3.0.

No context found.

ATM Forum. ATM User-Network Interface Specification, Version 3.0, June 1993. 37

No context found.

ATM Forum, "ATM User Network Interface Specification", Version 3.0, September 1993.

No context found.

ATM Forum. ATM User-Network Interface Specification, Version 3.1, September 1994.

No context found.

ATM Forum, ATM User-Network Interface Specification,Version 3.0, September 1993.

First 50 documents  Next 50

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