Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam, "The available bit rate service for data in ATM networks," IEEE Communications Magazine, vol. 34, pp. 56--71, May 1996.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....also able to offer QoS measured in terms of blocks. In particular, the concept of cell loss rate can be generalized to block loss rate. End to end delay bounds for blocks are obtained by specifying a burst [16] 17] to represent a block of ATM cells. A short overview of ABT can be found in [2]. B. Burst Scheduling For burst scheduling networks [16] we model a flow as a sequence of bursts, each of which models a sequence of packets that carries an application specific data unit. A burst corresponds to a block in ABT with some minor differences in detail. In particular, instead of two ....

T. M. Chen, S. S. Liu, and V. K. Samalam, "The available bit rate service for data in ATM networks," IEEE Commun. Mag., pp. 56--71, May 1996.

.... forward RM cells (FRMs) while those returning from the destination to the source are called backward RM cells (BRMs) refer to figure 2) When a source receives a BRM cell, it computes its allowed cell rate (ACR) using its current ACR value, the CI and NI flags, and the ER field of the RM cell [2, 3, 5, 7, 13, 14]. 7 3.4 GFR The GFR service requires user data to be divided into frames that can be delineated at the ATM layer. If the user sends frames not exceeding the maximum frame size (MFS) in a burst that does not exceed the maximum burst size (MBS) the user can expect its frames to be delivered with ....

....specifies the desired queuing delay. A value of 1.5 ms was used. The hyperbolic function curve parameters used were a = 1:15 and b = 1. The F min value was set 15 20 40 60 80 100 120 140 160 0 100 200 300 400 500 600 3 Sources: ACR for ABR sources ACR of abr[1] ACR of abr[2] ACR of abr[3] (a) Rates of the 3 sources 1000 2000 3000 4000 5000 6000 7000 8000 9000 0 100 200 300 400 500 600 700 Queue length (cells) Time in milliseconds 3 Sources : Bottleneck Queues ABR Queue (b) Queue length at the bottleneck Figure 11: Results for the three source configuration with ....

Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam. The available bit rate service for data in ATM networks. IEEE Communications Magazine, 34(5):12, May 1996.

.... Because of the required adaptation on the part of the users (applications) the latter have been termed elastic in the Internet community [BCS94, She95b] An example of a service with closed loop control that we will focus on is the Available Bit Rate (ABR) service in ATM networks [ATMF96, CLS96] How do the two different control mechanisms used in services with open loop and closed loop congestion control affect the way such services are priced In services with open loop control, there is a traffic contract which contains the agreed QoS and a traffic descriptor. The user is free to ....

....through a comprehensive set of simulation experiments. 5. 1 Technological Characteristics and Desirable Properties of Pricing The Available Bit Rate (ABR) service category is intended for applications that can gracefully adapt their sending rate to time varying available bandwidth [ATMF96, CLS96] Such applications have been termed elastic in the Internet community [BCS94, She95b] Although ABR does not support specific Quality of Service (QoS) other than the guarantees provided by a Minimum Cell Rate (MCR) it is expected that sources which adapt to the congestion control signals will ....

T. M. Chen, S. S. Liu, and V. K. Samalam. The available bit rate service for data in ATM networks. IEEE Commun. Mag., pages 56--70, May 1996.

....under Grant NCR 9628116. tiated QoS parameter is the CLR and is not necessarily quantified. Peak Cell Rate (PCR) Cell Delay Variation Tolerance (CDVT) and Minimum Cell Rate (MCR) are the traffic parameters. The ABR service class is different from the other service classes in many ways [2] .The available bandwidth is shared by the ABR connections and can change dynamically due to the fluctuations in the VBR and CBR traffic and it may reduce to the MCR. Since VBR and CBR traffic rates fluctuate in time, the ABR sources should adjust their rates to these fluctuations in order to ....

T. Chen et al. , "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, pp. 56-71, May 1996.

....Service Center 445 Hoes Lane P.O. Box 1331 Piscataway, NJ 08855 1331, USA. Telephone: Intl. 908 562 3966. data traffic, and the characteristics of interfering traffic. ATM s ABR service uses feedback based control to dynamically make use of bandwidth not utilized by other service classes [1]. The ABR service class is possible because data applications are more resilientto delays than video; delay jitter of tens of milliseconds are rarely noticed by users of data applications while delay jitters of just a few milliseconds can render realtime data useless. As such, ABR service may ....

Thomas M. Chen, Steve S. Liu and VijayK. Samalam, "The Available Bit Rate service for data in ATM networks", IEEE Communications, May, 1996.

....the Pacific Bell CalREN program, the Standard Microsystems Corp. Nippon Steel Information and Communication Systems Inc. ENICOM) Hitachi Ltd. Hitachi America, Tokyo Electric Power Company, and Nippon Telegraph and Telephone Corporation (NTT) bandwidth not utilized by other service classes [1]. Data applications are more resilient to delays than video; delay jitter of tens milliseconds are rarely noticed by users of data applications while delay jitters of just a few milliseconds can render real time data, such as video, useless. As such, the transmission of data packets (or ....

Thomas M. Chen, Steve S. Liu and Vijay K. Samalam, "The Available Bit Rate service for data in ATM networks ", IEEE Communications, May, 1996.

....Nippon Telegraph and Telephone Corporation (NTT) Nippon Steel Information and Communication Systems Inc. ENICOM) and Matsushita Electric Industrial Company. ATM s ABR service uses feedback based control so that it can dynamically make use of bandwidth not utilized by other service classes [1]. The ABR service class is possible because data applications are more resilient to delays than video; delay jitter of tens of milliseconds are rarely noticed by users of data applications while delay jitters of just a few milliseconds can render real time data useless. As such, ABR service may ....

Thomas M. Chen, Steve S. Liu and Vijay K. Samalam, "The Available Bit Rate service for data in ATM networks", IEEE Communications, May, 1996.

....unspecified bit rate (UBR) services. In UBR service, sources merely specify a peak cell rate and transmit data at any time. Inevitably, some data cells will be dropped. The ABR service attempts to reduce cell loss by utilizing feedback from the network to determine when data should be transmitted [4]. There are two major categories of ABR schemes. Rate based schemes, such as ERICA and EPRCA, control the transmission rate of a IP ATM Data unit IP datagram ATM cell, AAL5 packet Addresses 32 bit, 128 bit IPv6 E.164 Routing OSPF, RIP BGP PNNI QoS IPv6 RSVP RTP over UDP CBR, VBR, UBR, ABR ....

T.M. Chen, S.S. Lie and V.K. Samalam, "The Available Bit Rate service for data in ATM networks", IEEE Communications, May 1996.

.... for the ABR service class, because ABR does not provide the same level of QoS as the CBR VBR classes there is very limited or no resource allocation prior to the information transfer phase the bandwidth available for the ABR calls uctuates in time in accordance with the load on the link [1,5,7,21,25]. Since we have to dispose of the direct application of the equivalent bandwidth based approach when devising and analyzing link capacity sharing policies, we seek alternative methods to do this. This problem has been raised by for instance [18] and [19] as well, without providing an analytical ....

T. M. Chen, S. L. Liu and V. K. Samalam, "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, pp. 56-71, May 1996.

....management for ABR service over a BSN interworking with an ATM BISDN. In an ATM network, active ABR traffic sources contend for available bandwidth according to the current demand of each source. The ATM Forum has specified the rate based congestion control scheme for ABR traffic management [2, 3, 4, 5]. The sources adapt their rates according to feedback congestion information contained in resource management (RM) cells received on the reverse channel. Many closed loop congestion control algorithms have been proposed [6, 7, 8, 9, 10, 11, 12, 13] Two basic schemes employing the explicit forward ....

....according to feedback congestion information contained in resource management (RM) cells received on the reverse channel. Many closed loop congestion control algorithms have been proposed [6, 7, 8, 9, 10, 11, 12, 13] Two basic schemes employing the explicit forward congestion indication (EFCI) [5] and the explicit rate (ER) 8, 9] mechanisms are considered here. Theoretical evaluations of the transient and steady state effects of the round trip time (RTT) delay and the rate control parameters on the buffer requirements in ATM switches using rate based congestion control [14, 15] show that ....

T. M. Chen, S. S. Liu and V. K. Samalam, "The available bit rate service for data in ATM networks," IEEE Communications Magazine, pp. 56 -- 71, May 1996.

.... ABR service class, because ffl ABR does not provide the same level of QoS as the CBR VBR classes ffl there is very limited or no resource allocation prior to the information transfer phase ffl the bandwidth available for the ABR calls fluctuate in time in accordance with the load on the link [1]. Since we have to dispose of the direct application of the equivalent bandwidth based approach when devising and analyzing link capacity sharing policies, we seek alternative methods to do this. This problem has been raised by for instance in [2] without providing an analytical approach or a ....

T. M. Chen, S. L. Liu, V. K. Samalam, "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, pp. 56-71, May 1996.

....of the IP Rate Control architecture which can be used to implement the service in a given networking platform. 3 1 Introduction Figure 1 illustrates the concept of End to End (E2E) IP rate control which is similar to the rate control used in Asynchronous Transfer Mode (ATM) networks [2]. Using Internet Control Message Protocol (ICMP) the source periodically sends probe packets to the destination (Forward Probe Message or FPM) The destination returns these probe packets to the source (Backward Probe Message or BPM) Routers along the route compute the fair share for the flow to ....

Thomas M. Chen, Steve S. Liu and Vijay K. Samalam, "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, May 1996.

....the entire block if the required bandwidth is not available. In other words, the switches perform block based admission control. 1 End to end delay bounds for blocks are obtained by specifying a burst [14, 15] to represent a block of ATM cells. 2 A short overview of ABT can be found in [3]. 3 With block based admission control, cell losses are concentrated over a small number of blocks, and bandwidth is not wasted on delivery of partial blocks. Therefore, ABT is able to avoid the situation in which cell losses spread over a large number of higher layer data units causing ....

Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam. The available bit rate service for data in ATM networks. IEEE Communications Magazine, pages 56--71, May 1996.

.... 2 Architecture of E2E IP Rate Control The basic idea of end to end network level flow control is taken from the Asynchronous Transfer Mode (ATM) network s Available Bit Rate (ABR) service which deploys such rate control to provide fast access to any unused bandwidth in the core of the network [6]. Figure 1 illustrates the concept of E2E IP rate control. Using Internet Control Message Protocol (ICMP) the source of a traffic flow periodically sends probe packets to the destination. The destination returns these probe packets to the source. The intermediate routers compute fair share for ....

Thomas M. Chen, Steve S. Liu and Vijay K. Samalam, "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, May 1996.

....the aim to provide predictable service, i.e. response delivery within a specified amount of time T , an application ideally wants to know the network service quality, and in particular the bandwidth available for the time T . With a best effort network service model, such as IP s and ATM ABR s [7], there is no way of getting such information in advance. Thus, all we can do is gather as much QoS information about the past behavior as possible (and useful) and extrapolate future network behavior from the observed QoS values. We can distinguish two different application relevant ....

....capable of identifying and isolating misbehaving senders. Furthermore, routers are able to provide explicit feedback about their congestion state to the end systems. Each router on an end to end path may generate feedback messages (either in binary form [31] or as an explicit rate information [7]) The feedback must be processed in the end systems to find the available bandwidth used to control the sending rate. It is important to note that the different layers may have different perceptions of the current network status since they employ different mechanisms to deal with exceptions such ....

T. M. Chen, S. S. Liu, and V. K. Samalam. The available bit rate service for data in ATM networks. IEEE Communications Magazine, 34(5):60-- 71, May 1996.

....by the Traffic Management Group of the ATM Forum. Our review is based on Revision 11 of the Traffic Management Specification Version 4.0 [21] Note that the review is not comprehensive. For a more complete discussion we refer to the ATM Forum documents [21] and a set of excellent survey papers [3, 6, 11, 22]. 2.1 The ATM Forum Specification During connection establishment, a source endsystem negotiates with the ATM network the maximum (peak) cell rate (PCR) the minimum cell rate (MCR) and an initial cell rate (ICR) for a new ABR connection. At all times the allowed cell rate (ACR) of an ABR ....

.... a connection i, Share i , is calculated as [21] Share i = B n Many algorithms for implementing max min fairness were presented to the ATM Forum, including EPRCA, ERICA, DERA and others [4, 11, 12, 13, 19, 21, 5] 2 The given operations are simplified versions of the actual calculations (see [3, 6, 21]) A major disadvantage of max min fairness is that it enforces the same fairness policy on all ABR connections and does not differentiate among different types of ABR connections. However, since the bandwidth demands of ABR connections can vary by several orders of magnitude, more sophisticated ....

T. M. Chen, S. S. Liu, and V. K. Samalam. The Available Bit Rate Service for Data in ATM Networks. IEEE Communications Magazine, 5(34):56--71, May 1996.

....keep track of the changing conditions and maximize resource usage while minimizing losses. The problem of simultaneously achieving both those goals is not trivial and another constraint that must be considered is implementation complexity. Several mechanisms were proposed generating intense debate [3][4] 5] Under all those considerations, the ATM Forum specified an ABR congestion control mechanism with a control loop associated with each information flow. Resource Management (RM) cells are used in the control loop, being inserted in the information flow and carrying information from source to ....

T. Chen, S. Liu and V. Samalam, "The Available Bit Rate Service for Data in ATM Networks", IEEE Commun. Mag.; vol.34, no.5; May 1996; pp. 56-8, 63-71.

....Foundation under Grant NCR 9628116. tiated QoS parameter is the CLR and is not necessarily quantified. Peak Cell Rate (PCR) Cell Delay Variation Tolerance (CDVT) and Minimum Cell Rate (MCR) are the traffic parameters. The ABR service class is different from the other service classes in many ways [2] .The available bandwidth is shared by the ABR connections and can change dynamically due to the fluctuations in the VBR and CBR traffic and it may reduce to the MCR. Since VBR and CBR traffic rates fluctuate in time, the ABR sources should adjust their rates to these fluctuations in order to ....

T. Chen et al. , "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, pp. 56-71, May 1996.

....discard cells; if each message has only one parity cell, the objective would be to avoid discarding more than one cell from a message so that the message loss probability is further improved [11] 3. 3 ATM block transfer The ATM block transfer (ABT) capability being standardized by ITU T [7, 3] has been known for some time as a fast reservation protocol [2] The concept of a block was introduced to represent some high level protocol data unit(s) Conceptually, a traffic source generates a sequence of blocks, each of which is a sequence of cells bracketed by two RM cells. The leading ....

Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam. The available bit rate service for data in ATM networks. IEEE Communications Magazine, pages 56--71, May 1996.

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Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam, "The available bit rate service for data in ATM networks," IEEE Communications Magazine, vol. 34, pp. 56--71, May 1996.

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T. M. Chen, S. M. Liu, and V. K. Samalam, "The Available Bit Rate Service for Data in ATM Networks," IEEE Communications Magazine, Volume 34, Number 5, pp. 56 - 71, May 1996.

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T. Chen et al. , "The Available Bit Rate Service for Data in ATM Networks", IEEE Communications Magazine, May 1996.

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T. M. Chen, S. S. Liu, and V. K. Samalam, #The Available Bit Rate Service for Data in ATM Networks," IEEE Commun. Magazine, pp. 56#71, May 1996.

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Thomas M. Chen, Steve S. Liu, and Vijay K. Samalam. The available bit rate service for data in ATM networks. IEEE Communications Magazine, pages 56--71, May 1996.

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Thomas M. Chen, Steve S. liu and Vijay K. Samalam, "The Available Bit Rate service for data in ATM networks," IEEE Communications Magazine, vol. 34, NO. 5, May 1996.

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