Multicast routing infrastructure in ATM networks

1994

USTRACT. The mutmg in ATM networks consists in assigning a path to the CoMCctio~ls dunands. For each new call the network must select a path that has s&cicnt baadwictth available to canbd (CAC) policy bas a stmq influence in the routing pdormancc. ?he CAC propossd h r the cvaluatioll ofthe best routing option is the Enhanced Convolution Approach.

Arxiv preprint cs/9809084, 1998

Abstract: The paper begins with a discussion of current trends in networking and a historical reviews of past networking technologies some of which failed. This leads us to the discussion about what it takes for a new technology to succeed and what challenges we face in making the current dream of a seamless world-wide high-speed ATM network a reality.

IX Jornadas TELECOM I+ D' …, 1999

This paper surveys novels and/or sophisticated concepts which are included in the development of the new protocols to provide current networks with the high performance that the multimedia applications need for their definitive implantation. We pay special attention to the concept of native-mode ATM (i. e. N 3 , CONGRESS and kStack) and transport protocols developed for ATM technology (i. e. SHiPP). SMART, MCMP or MWAX are the most representative examples of many-to-many (multicast) ATM protocols. We also shall present several proposals to support IP over ATM technology (classical IP-over-ATM, EPD, RED, IP switching, MPOA, etc). This work concludes with a discussion of new research or new trends such as the active (programmable) networks, or mobile agents.

1995

Abstract The paper begins with a discussion of current trends in networking and a historical reviews of past networking technologies some of which failed. This leads us to the discussion about what it takes for a new technology to succeed and what challanges we face in making the current dream of a seamless world-wide high-speed ATM network a reality.

In the context of an ATM access and transport network, carrying guaranteed quality (CBR, rt-VBR) services as well as IP datagrams (as ABR or UBR traffic classes), we consider the joint problems of Call Admission Control (CAC), bandwidth allocation and routing.. The presence of distributed access multiplexers is assumed, which are both geographically dispersed (e.g., at the user premises) and hierarchically structured. Such multiplexers are intelligent devices with decision making capabilities that operate jointly, in order to make the best possible use of the transport capacity of the access network and to maintain the Quality of Service (QoS) requirements of different users and service classes. Following the physical system organization, a hierarchical control structure is defined, where the admission of calls for real-time traffic classes (or different users) is performed by independent cotrollers; the latter are parametrized by the bandwidths allocated by a common agent, playing the role of a coordinator in the hierarchical control scheme. This decision maker aims at minimizing a global cost that captures QoS requirements both at the call-level (call blocking probability) for QoS-aware, connection-oriented services and at the cell-level (cell loss probability) for connectionless, best-effort, ones. The control architecture also reflects the multilayer hierarchy introduced by the presence of multiple teletraffic time scales, by essentially decoupling the above problem from that of ensuring QoS at the cell-level for services of the first type. We derive the optimal paraters setting by means of a mathematical programming procedure, and show an example for an ATM-PON (Passive Optical Network). Then , the same structure is applied to link multiplexers of the transport network nodes, which are supposed to posses both ATM and IP switching/routing capabilities, and a possible organization of the routing strategies at both ATM and IP levels is outlined.

21st Conference on Local Computer Networks (Lcn

This paper presents a performance analysis of topological and geographical multicast routing algorithms for mobile wireless ad hoc networks. Flooding and On-Demand Multicast Routing Protocol (ODMRP) are simulated and compared with two novels protocols proposed: Topological Multicast Routing Protocol (ToMuRo) and Geographical Multicast Routing Protocol (GeMuRo) in pedestrian and vehicular scenarios. The scenarios evaluated consider one multicast transmitter and one, two, and three multicast receivers under various mobility and transmission ranges. The behavior of 250 nodes is evaluated in terms of End to End Delay (EED), Jitter and packet delivery ratio and overhead. Results show that ToMuRo is suitable for pedestrian scenarios due to its treebased architecture and GeMuRo is proper for vehicular scenarios because it is based on a mesh topology.

Computer Communications, 1999

ATM networking was conceived some 20 years ago. ATM installations will reach their peak in the next decade. It is time to begin to consider what technology should follow ATM and how best to get there. In this article, we address some of the most important issues regarding recent advances in ATM research, including IP/ATM integration, connection admission control, signaling, and active and programmable networks. We present several research efforts conducted here at Cambridge University, illustrating possible evolutionary directions for future ATM networks. ᭧ Computer Communications 22 (1999) 499-515 COMCOM 1548 0140-3664/99/$ -see front matter ᭧

ACM SIGCOMM Computer Communication Review, 2002

ATM was the focus of active research and significant investment in the early to mid 1990's. This paper discusses several visions for ATM prevalent at the time, and analyzes how ATM evolved during this period. The paper also considers the implications of this history for current connection-oriented technologies, such as optical transport networks and MPLS.

1997

Abstract-Asynchronous transfer mode ATM networks must define multicast capabilities in order to efficiently support numerous applications, such as LAN emulation, Internet protocol IP multicasting, video conferencing and distributed applications. Several problems and issues arise in ATM multicasting, such as signaling, routing, connection admission control, and traffic management problems. IP integrated services over ATM poses further challenges to ATM multicasting.

Computer Networks and ISDN Systems, 1996

This paper describes recent experiences with evaluating and implementing advanced intemetwork communication protocols on top of ATM. First, performance results with conventional TCP/IP over ATM based on Digital Equipment's Gigaswitch/ATM are reported. It becomes obvious that current protocols must be tuned specifically in order to exploit ATM performance. In order to address advanced quality of service issues based on resource reservation, the paper describes an implementation of IPng (IP next generation) and RSVP (Resource Reservation Protocol) over ATM. Solutions for mapping quality of service and traffic parameters in an adequate way are presented. Moreover, the issue of address mapping from Prig onto ATM is discussed. Implementation results and experiences in these areas are illustrated. Finally, ongoing current work on resource reservation in advance is presented. It is outlined that longer-term resource planning and scheduling provides additional benefits for selected ATM applications. port-and network-level protocols are required in heterogeneous settings, for example with Ethernet, FDDI, and ATM subnetworks being interconnected [I, 191. The typical choice of many vendors is to offer the TCP/IP protocol suite [24] over ATM, based on the IP over ATM recommendation of the ATM Forum [ 181. LAN Emulation [ 15,171 presents another alternative, however with significant limitations. Most important, compatibility of existing applications with ATM is achieved by using IP over ATM.