By Topic

ATM, 1998. ICATM-98., 1998 1st IEEE International Conference on

Date 22-24 June 1998

Filter Results

Displaying Results 1 - 25 of 72
  • 1998 1st IEEE International Conference on ATM. ICATM'98

    Save to Project icon | Request Permissions | PDF file iconPDF (346 KB)  
    Freely Available from IEEE
  • Dynamic multicast on loss networks

    Page(s): 145 - 154
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1048 KB)  

    Dynamic multicast allows members to join or leave the multicast session during its active period. In this paper, we propose a dynamic multicast routing scheme which integrates the consideration of maximum-free-circuit routing on loss networks and changes of membership. Two reference reward estimation schemes, the uniform reference reward scheme and weighted reference reward scheme for the maximum-free-circuit routing are proposed. Routing algorithms consisting of the initial connection setup as well as the joining and leaving of members are also developed. Using simulation experiments, the benefits of the weighted reference reward involve more revenue generated and a higher probability for successfully connecting a member when it issues a join request. On the other hand, the routing algorithm based on the uniform reference reward scheme can connect more members in the initial connection setup View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Routing in a hierarchical structure

    Page(s): 378 - 384
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB)  

    This paper considers routing in a given hierarchical structure. The work is inspired by the ATM Forum's PNNI specification. It is argued that any routing problem that has a solution in a single (flat) network is also tractable and feasible in a hierarchy View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cells in frames: ATM over legacy networks

    Page(s): 418 - 422
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    Cells in frames is a technology developed at Cornell University in conjunction with members of the CIF Alliance which provides a mechanism for running complete ATM protocol stacks, along with service quality guarantees, on legacy, frame-based networking hardware such as Ethernet or token ring. The CIF protocol also provides for the use of variable-length ATM packets, potentially reducing the cell tax overhead frequently identified as an inefficiency in the ATM cell format. Because CIF provides access to the full ATM stack, it can be thought of as a frame-based PHY layer. In this paper we will discuss the rationale for developing cells in frames, the protocol and frame format, and our experience with the technology. We will pay particular attention to performance, particularly in the contexts of desktop operating systems such as MacOS and Windows 95/NT and of multimedia data transport. While CIF has received some attention in the literature, this paper presents the first published results of a CIF implementation View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Resource location in mobile ATM networks

    Page(s): 423 - 430
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (840 KB)  

    This paper discusses the location management of mobile resources in ATM networks, with a focus on mobile switches and mobile networks. Two location management schemes are presented. The first one uses location registers to maintain a mapping between permanent addresses of mobile devices and assigned visitor addresses. The effect of mobility is isolated from standard routing, and a two-step routing approach is used to establish a call to a mobile device, leading to a suboptimal routing of connections. The second scheme is a mobility extension of the PNNI routing protocol. It allows mobile switches to change their membership dynamically to peer groups as they change access points. This approach is generalized to mobile logical group nodes, and allows mobile networks to be integrated in the PNNI hierarchy of a fixed network, allowing the optimal routing of connections. Both location management schemes are discussed and compared View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Agents based approach for QoS adaptation in distributed multimedia applications over ATM networks

    Page(s): 319 - 326
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (736 KB)  

    Multimedia communications have evolved rapidly during the last few years and they now require communication services with guaranteed quality of service (QoS). For the type of these new distributed multimedia applications, it is crucial to monitor continuously the current QoS parameters of a connection to ensure that they comply with the pre-arranged negotiated values. The method proposed in this paper suggests the use of QoS monitoring agents in the ATM switches as well as in the end systems, in a way that allows automatic recovery, if possible, from all the QoS violations. The recovery will be achieved by redistributing the levels of QoS that should be supported immediately by a component to meet the end-to-end requirements. An initial architecture is proposed as well as the communication protocol between the agents and future directions are given View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • QoS control: an application integrated framework

    Page(s): 283 - 290
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (800 KB)  

    Network technology is becoming simpler in order to support the widest possible range of user applications. Therefore, the specific requirements of each application must be performed outside of the network and the adaptation mechanisms should be done by the applications. For the case of multimedia applications the programming a task can even be more simplified if several “low-level” aspects can be made transparent by the use of a suitable framework. This paper presents such a framework with some algorithms to control some of the previous aspects, namely data handling and dynamic QoS control. It provides the application with a mechanism to constantly adapt the quality of the continuous media being transmitted. The algorithm takes into account not only the network conditions but the end host conditions as well. Some experiments are presented View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An architecture for flexible high level communication services

    Page(s): 184 - 190
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (540 KB)  

    The broadband integrated service digital network (B-ISDN) will have to offer real-time communication services; that is, it will have to transport information with performance guarantees. In this paper, we propose a communication system for real-time applications using a 155 Mbits/sec ATM (asynchronous transfer mode) switch. This system is based on an intelligent communication board for PCs (personal computer). It integrates a transputer, an FPGA (field programmable gate array), and a VRAM (video random access memory) to implement flexible high level communication services. These services are adapted for real-time data transmission on a local area network based on the ATM standard. The main advantages of our architecture are the path redundancy, the large spectrum of traffic, and the high bandwidth inside the workstation. We discuss the implementation structure of our ATM communication board and evaluate its performance View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation study of AAL type 2

    Page(s): 522 - 528
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (588 KB)  

    Cellular network applications are growing drastically and this requires a fast and efficient transport method between the base station and the mobile switching center. One possible solution is to use ATM links. The low data rate and small-sized packets in the typical cellular applications imply that a significant amount of link bandwidth would be wasted if this small sized packet is carried by one ATM cell. For efficient operation for such cellular and low bit rate applications, a new type of ATM adaptation layer, AAL type 2, has been proposed. In this paper the principles of AAL type 2 are briefly described along with an introduction to other alternatives which have formed the basis for this new AAL. The result from the simulation to study the performance of the AAL type 2 is discussed from the packet delay and ATM cell use efficiency point of view. Due to the variable sizes of packets in this application, the fairness issue in serving variable sized packets is also discussed along with the effect of a fair queueing algorithm implemented at AAL type 2 View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ATM for wireless networks

    Page(s): 16 - 24
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (968 KB)  

    Growing emphasis on broadband multimedia traffic has underlined the importance of asynchronous transfer mode (ATM) networks which are capable of accommodating demanding applications such as audio/video playback, image browsing, real-time voice/video transmission and interactive data exchange in a unified manner. However, the extension of ATM from wireline to wireless creates a new set of challenging issues. ATM standards are developed based on high data rates and reliable transmission links. This is in contrast to wireless channels where bandwidth is limited and error rates are high. Furthermore, existing ATM specifications are designed primarily to provide services to fixed end-terminals with little ability to adapt to mobile connections and the highly time-varying conditions associated with wireless networks. This paper surveys the major technical and service issues related to the deployment of ATM in third-generation wireless networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • TCP performance over ATM on Linux and Windows NT

    Page(s): 465 - 472
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    In today's local area networks, ATM is often used as a replacement for slow Ethernet. This work measures and compares performance of the transmission control protocol (TCP) over ATM on two popular operating systems on PC hardware. Throughput and round trip latency of TCP data transfer over both Linux and Windows NT on identical hardware were measured. For throughput measurements, send and receive performances have been isolated by using a fast third-party machine as peer. Firstly, measurements indicated that high-end PC hardware can utilize the bandwidth provided by 155.52 Mbps ATM network adapters well. Running the heavyweight TCP protocol, data rates of up to 83% of the bandwidth available have been observed. As a second result, Linux and Windows NT bulk data throughput were competitive. However, particularly on slow hardware, the Linux implementation consistently outperformed NT. Finally, significant latency differences in the order of a 50% advantage for Linux were indicated by the request-response test suite View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance implications of QoS mapping in heterogeneous networks involving ATM

    Page(s): 529 - 535
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (580 KB)  

    In this paper we discuss issues relating to the mapping of QoS parameters in an IP/ATM environment. We conduct preliminary experiments with constant TP packet rate, which after segmentation in AAL5, generates a jittered CBR cell stream. We use this stream to investigate the effect of parameter translation on the QoS received by the application. Results indicate that translation does have a significant impact on performance, in particular, on cell loss. There are also cost implications, as large buffers are required to achieve an acceptable level of performance View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CRAM: cell re-labeling at merge-points for ATM multicast

    Page(s): 162 - 167
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (448 KB)  

    Many distributed multimedia applications involve data delivery from a source to multiple destinations, the participating nodes forming a multicast group. In the naive solution, separate connections can be established from each source to other group members. However a tree can be established for each source with the participants as the leaf nodes or just have one tree spanning all the participants. In this paper, we introduce a data forwarding model to support such shared multicast trees over the ATM networks called CRAM (cell re-labeling at merge-points for ATM multicast). Our work allows VC merging in the MPLS architecture and supports recently proposed wide area multicast protocols (like CBT and PIM) in ATM networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Intelligent building systems: system integration using ATM

    Page(s): 349 - 358
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (780 KB)  

    In the information society we live in, offices are becoming our “second home”. A comfortable and secure environment for people in the work place, as well as increasing efficiency and productivity, indicate a growing interest in the integration of information technologies and telecommunications in intelligent buildings. These needs are engaged in large scale distributed environments and a solution for this integration is a type of network that can be standardised throughout the world. This article shows how ATM, being currently the most effective B-ISDN protocol for WAN and LAN, could meet all the requirements for fully integrated systems in intelligent buildings View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IP or ATM versus IP over ATM: the role of the ATM Forum and the IETF in setting standards

    Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    The content of this text includes a description of the state of the art of the definition tasks of the ATM Forum and the IETF in the domain concerned, at the time of writing, under the best understanding of the author, and does not represent any definitive commitment of the ATM Forum or the IETF View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Support for multimedia applications in a wireless ATM system

    Page(s): 31 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1128 KB)  

    Mobility will be one key issue for future broadband access. Consequently, many research projects are currently focusing on wireless ATM networks. Within the European ACTS research program the “Magic WAND” project is developing mobile terminals and access points based on wireless ATM technology. The terminals will communicate at a speed up to 20 Mbit/s in the 5 GHz band within multiple picocells of approximately 50 meters in diameter. This technology supports applications and services demanding both high bandwidth and mobile network access, two contradicting requirements in the past. We take a look at typical multimedia applications and evaluate the key components of the WAND system necessary to support their quality of service (QoS) requirements. One major challenge is to guarantee QoS transparently over the wireless link. We present our solutions for a QoS-supported mobile audio/videoconferencing subsystem and analyse how video compression algorithms behave under the conditions of a wireless medium View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scaling of ABR parameters using a parallel control scheme in ATM networks

    Page(s): 224 - 233
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (992 KB)  

    This paper proposes a new parallel control scheme with feedback control (PCFC) for ABR services in ATM networks. The information from a source is split into a number of streams for delivery over separate parallel connections. At the receiver, the original information is reconstructed using the cells received from the parallel connections. Traffic splitting of PCFC achieves two advantages for the network performance: reduction of traffic burstiness and load balancing. By combinations of analysis and simulation, this paper studies how the ABR parameters should be scaled when PCFC is used and the advantages of PCFC compared with other existing schemes View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • MPEG video aggregation over ABR-ATM

    Page(s): 59 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (584 KB)  

    Available bit rate (ABR) service may be used by applications which expect cell loss guarantees, but can control their data dynamically as demanded by the network. The introduction of variable bit rate (VBR) background traffic makes ABR capacity variable. A video aggregation system can adapt the traffic from several Moving Picture Expert Group (MPEG) sources as a bundle to the ABR on the network, obtaining an homogeneous image quality among all the video sequences, discarding the less-relevant information of each source according to image quality View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • NETrix: a procedure for the calculation of the network structure and traffic matrix in ATM networks

    Page(s): 359 - 364
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB)  

    NETrix is a strategic planning tool which considers a specific client broadband service classification scheme where each service is modelled by a set of values from a service attribute model and the service occupation by corresponding parameter values for each client class. NETrix uses the mean value and its variance of the digital signal stream of the corresponding service for the source traffic description and calculates the total node traffic as the sum of all corresponding source traffic. Nodes are classified by a heuristic algorithm based on the total node traffic and the geographical distance allowing the level of some nodes to be predetermined. This results in a two level network composed of concentrators in the access layer and switching units in the backbone one. The node traffic of each service class is then distributed over this network topology with a corresponding traffic distribution model. This model considers two parameters, geographical distance and traffic volume in the nodes, where the values of the parameter are assigned individually for each service class. As a result of this distribution, NETrix gets the traffic flow over all access and backbone links by considering a star structure for the access network and a full meshed structure for the backbone one. NETrix provides a set of additional procedures to analyse the obtained results in each planning step with a corresponding numerical and graphical representation View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A detailed experimental performance evaluation on TCP over UBR

    Page(s): 214 - 223
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (856 KB)  

    The ATM service category UBR is intended for non-real-time applications that do not require guaranteed QoS commitments. With additional, relatively inexpensive control functions such as packet discard schemes, UBR could become a cost-effective alternative for the transmission of data traffic; offering a straightforward and flexible solution as opposed to nrt-VBR and GFR that applies stricter traffic specifications as well as ABR with its sophisticated and complex rate-control protocol. This paper presents the results obtained from a comprehensive set of experiments with TCP over UBR, comprising of measurements taken on different protocol layers. The goal is to experimentally investigate the performance of UBR to carry TCP traffic, to evaluate the performance gain achievable by packet discard schemes and TCP parameter tuning, to study the influence of the TCP implementation, and in a final step, to relate the measurements to simulation results View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Smart IP switching: a hybrid system for fast IP-based network backbones

    Page(s): 500 - 506
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (596 KB)  

    The process of routing, that is, the handling of Internet protocol (IP) packets at layer 3 (the network layer), is a potential bottleneck in large intranets and the public Internet. Asynchronous transfer mode (ATM) provides a hardware capability of switching cells at very high speeds at layer 2 (the link layer). A number of schemes for supporting IP over ATM hardware have emerged in recent years. These techniques may be broadly categorised by the approach they employ to set up paths through the network, namely, traffic-driven and control-driven. We propose a hybrid scheme, which while being essentially traffic-driven, exhibits advantages of both the traffic-driven and control-driven approaches View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient connection admission control for real-time video multiplexing

    Page(s): 66 - 70
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (368 KB)  

    We tackle the problem of characterizing variable bit rate MPEG sources in order to allow for efficient video multiplexing in asynchronous transfer mode (ATM) networks. We show that the gamma distribution is a good tool for modeling the aggregate traffic of homogeneous as well as heterogeneous VBR MPEG sources. Therefore, we propose the use of simple and intuitive video descriptors based on the gamma modeling of the sources: the mean rate and variance. We show that the proposed descriptors allow for the implementation of an efficient connection admission control (CAC) function that agrees well with simulation results. We also show how this video characterization may be used in conjunction with rate shaping algorithms (variance control) to provide an even more efficient CAC View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • BAAWAM with wireless-specific quality of service

    Page(s): 77 - 86
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (684 KB)  

    The development of broadband fixed networks which support different services has an impact on wireless networks. This is due to the growing number of users of PCS (personal communication systems) which support multiservices with the ability of moving. So, efficient multicasting is a fundamental issue for the success of these applications. Furthermore, with the emergence of mobile networks, there is a strong trend towards the extension of the existing networks, such as ATM, to support those multimedia group applications in a mobile environment. On the other hand, wireless asynchronous transfer mode (WATM) is emerging as a promising technology for multimedia applications in wireless networks. In our previous study we proposed the BAAWAM algorithm (bandwidth allocation algorithm in the wireless ATM for a multicast) which is a new bandwidth allocation policy in WATM networks to provide multicast transmissions. In this study, we modify this algorithm by integrating a flow control mechanism for the ABR, and we improve the quality of service (QoS) by defining a new bandwidth reservation policy View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the applicability and utility of Gaussian models for broadband traffic

    Page(s): 278 - 282
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (480 KB)  

    Gaussian traffic models for high speed communication networks have received an increasing amount of attention. There are some puzzling and counter-intuitive features to deal with, such as negative traffic. However, on the plus side, the central limit theorem can be invoked to argue that traffic will become closer to Gaussian as more and more of it is aggregated together. The Gaussian model has a number of interesting implications for connection admission control and network architecture, which are discussed in this paper. Finally, there is an important distinction between continuous time and discrete time models which we need to make. It appears that the continuous time Gaussian models currently under study are significantly different from the discrete time models discussed in this paper View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Extension of classical IP over ATM to support QoS of the application level

    Page(s): 492 - 499
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (704 KB)  

    After the introduction of the basic concepts of classical IP over ATM (CLIP), this paper presents an extension to this standard as well as a full analysis of the technical viability of the extension proposal. One of the major drawbacks of CLIP is the co-existence of IP and ATM without quality of service (QoS) support. By extending the functionality of CLIP and redefining the mapping of IP and ATM addresses, QoS can be brought to IP-based applications without requiring any specific definition or implementation changes at the IP layer or above. QACLIP (QoS for applications using CLIP), the newly defined extension, allows applications to request specific QoS for their data transfer use View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.