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139
The SILO Architecture for Services Integration, controL, and Optimization for the Future Internet
- In: IEEE International Conference on Communications, ICC apos
, 2007
"... Abstract — We propose a new internetworking architecture that represents a departure from current philosophy and practice, as a contribution to the ongoing debate regarding the future Internet. Building upon our experience with the design and prototyping of the Just-in-Time protocol suite, we outlin ..."
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Cited by 38 (4 self)
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Abstract — We propose a new internetworking architecture that represents a departure from current philosophy and practice, as a contribution to the ongoing debate regarding the future Internet. Building upon our experience with the design and prototyping of the Just-in-Time protocol suite, we outline a framework consisting of (1) building blocks of fine-grain func-tionality, (2) explicit support for combining elemental blocks to accomplish highly configurable complex communication tasks, and (3) control elements to facilitate (what is currently referred to as) cross-layer interactions. In this position paper, we take a holistic view of network design, allowing applications to work synergistically with the network architecture and physical layers to select the most appropriate functional blocks and tune their behavior so as to meet the application’s needs within resource availability constraints. The proposed architecture is flexible and extensible so as to foster innovation and accommodate change, it supports a unified Internet, it allows for the integration of security and management features at any point in (what is now referred to as) the networking stack, and it is positioned to take advantage of hardware-based performance-enhancing techniques. I.
Addressing reality: An architectural response to demands on the evolving Internet
- In ACM SIGCOMM Workshop on Future Directions in Network Architecture
, 2003
"... A system as complex as the Internet can only be designed effectively if it is based on a core set of design principles, or tenets, that identify points in the architecture where there must be common understanding and agreement. The tenets of the original Internet architecture [6] arose as a response ..."
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Cited by 37 (1 self)
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A system as complex as the Internet can only be designed effectively if it is based on a core set of design principles, or tenets, that identify points in the architecture where there must be common understanding and agreement. The tenets of the original Internet architecture [6] arose as a response to the technical, governmental, and societal environment of internetworking’s earliest days, but have remained central to the Internet as it has evolved. In light of the increasing integration of the Internet into the social, economic, and political aspects of our lives, it is worth revisiting the underlying tenets of what is becoming a central element of the world’s infrastructure. This paper examines three key tenets that we believe should guide the evolution of the Internet in its next generation and beyond. They are: design for change, controlled transparency, and the centrality of the tussle space. [8] Our purpose is not to present these ideas as new, but rather to propose that they should be elevated to central tenets of the evolving architecture of the Internet, and explore the ramifications of doing so. The paper first examines the tenets somewhat abstractly, and then in more detail by studying their relation to several design choices needed for a complete architecture. We conclude with a discussion of the relationship between the network architecture and the applications it serves.
Just-in-time optical burst switching implementation in the ATDnet all-optical networking testbed
- In Proceedings of Globecom 2003
, 2003
"... Abstract—We describe: (i) the architecture of an optical burst switched (OBS) demonstration network overlaying the ATDnet transparent all-optical testbed, and (ii) experiments performed to date in the testbed. The OBS overlay uses a simple hardwarebased protocol embedded in OBS network controllers t ..."
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Cited by 25 (3 self)
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Abstract—We describe: (i) the architecture of an optical burst switched (OBS) demonstration network overlaying the ATDnet transparent all-optical testbed, and (ii) experiments performed to date in the testbed. The OBS overlay uses a simple hardwarebased protocol embedded in OBS network controllers to manage commercial off-the-shelf DWDM switches. Data paths are alloptical and completely transparent, and can carry analog or digital traffic in any format, data rate, and modulation scheme. Experiments with latency- and jitter-sensitive HDTV transmission, petabyte file transfers, and immersive real time visualization of satellite imagery over the OBS network are ongoing. Parallel research on transport protocols, QoS-aware routing protocols, adaptors for an OBS LAN, and a network management architecture will be applied as completed. This is the first just-in-time OBS field trial known to the authors. I.
A Queueing Network Model of an Edge Optical Burst Switching Node
- In Proceedings of IEEE Infocom 2003
, 2003
"... We consider an edge optical burst switching (OBS) node with or without converters, and with no buffering. The OBS node serves a number of users, each connected to the switch over a fiber link that supports multiple wavelengths. Each wavelength is associated with a 3-state Markovian burst arrival pro ..."
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Cited by 23 (3 self)
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We consider an edge optical burst switching (OBS) node with or without converters, and with no buffering. The OBS node serves a number of users, each connected to the switch over a fiber link that supports multiple wavelengths. Each wavelength is associated with a 3-state Markovian burst arrival process. The arrival process permits short and long bursts to be modeled. We model the edge OBS node as a closed non-product-form queueing network, with multiple heterogeneous classes, and we develop a suite of approximate decomposition algorithms to analyze it. Our approximate algorithms have a good accuracy, and they provide insight into the effect of various system parameters on the performance of the edge OBS node.
Topological design and dimensioning of agile all photonic networks
- Computer Networks
, 2006
"... Abstract: We present the design and analysis of an Agile All-Photonic Network (AAPN); in the context of our study, the agility is derived from sub-microsecond photonic switching and global network synchronization. We have articulated a set of circuit design alternatives in terms of switch configurat ..."
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Cited by 22 (5 self)
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Abstract: We present the design and analysis of an Agile All-Photonic Network (AAPN); in the context of our study, the agility is derived from sub-microsecond photonic switching and global network synchronization. We have articulated a set of circuit design alternatives in terms of switch configurations referred to as symmetric and asymmetric designs, and 2-layer and 3-layer designs and discuss the implications of these alternatives in terms of transmitter and receiver design and synchronization requirements. In order to evaluate performance and cost of this range of design alternatives, we developed a set of software tools and methodologies for designing and dimensioning our vision of an AAPN. The topological design problem consists of determining the optimal number, size and placement of edge nodes, selector/multiplexers and core switches as well as the placement of the DWDM links so as to minimize network costs while satisfying performance requirements of the supported traffic. A new mixed integer linear programming formulation is presented for core node placement and link connectivity, A methodology has been developed for two-layer and three-layer network topology design and implemented in software. These tools were exercised under a wide variety of equipment cost assumptions for both a metropolitan network and a long-haul network assuming a gravity model for traffic distribution and a flat community of interest factor. Key findings include the determination of near cost optimal designs for both metropolitan (two-layer design) and a Canadian Wide Area Network (WAN, three layer design). We also show the cost and topology sensitivity to the selector switch size and the preferred size in terms of port count and number of switches.
Jumpstart Just-in-Time Signaling Protocol: A formal description using extended finite state machines
, 2003
"... We present a formal protocol description for a just-in-time (JIT) signaling scheme running over a core dense wavelength division multiplexing (DWDM) network that utilizes optical burst switches (OBSs). We apply an eight-tuple extended finite state machine (EFSM) model to formally specify the protoco ..."
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Cited by 20 (5 self)
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We present a formal protocol description for a just-in-time (JIT) signaling scheme running over a core dense wavelength division multiplexing (DWDM) network that utilizes optical burst switches (OBSs). We apply an eight-tuple extended finite state machine (EFSM) model to formally specify the protocol. Using the EFSM model, we define the communication between a source client node and a destination client node through an ingress and one or multiple intermediate switches. We work on on-the-fly and persistent unicast connections. The communication between the EFSMs is handled through messages. 2003 Society of PhotoOptical Instrumentation Engineers. [DOI: 10.1117/1.1533795] Subject terms: extended finite state machines; optical burst switches; just-in-time signaling protocol; formal protocol description.
Analysis of TCP over Optical Burst-Switched Networks with Burst Retransmission
- PROCEEDINGS OF IEEE GLOBECOM
, 2005
"... Due to the bufferless nature of OBS networks, random burst losses may occur, even at low traffic loads. For optical burst-switched (OBS) networks in which TCP is implemented at a higher layer, these random burst losses may be mistakenly interpreted by the TCP layer as congestion in the network, le ..."
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Cited by 19 (9 self)
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Due to the bufferless nature of OBS networks, random burst losses may occur, even at low traffic loads. For optical burst-switched (OBS) networks in which TCP is implemented at a higher layer, these random burst losses may be mistakenly interpreted by the TCP layer as congestion in the network, leading to serious degradation of the TCP performance. In this paper, we reduce random burst losses by a burst retransmission scheme in which the bursts lost due to contention in the OBS network are retransmitted at the OBS layer. The OBS retransmission scheme can then reduce the probability that the TCP layer falsely detects congestion, thereby improving the TCP throughput. We analyze the TCP throughput when OBS networks employ the burst retransmission scheme and develop a simulation model to validate the analytical results. Based on our simulation results, we show that an OBS layer with burst retransmission provides an improvement of up to ten times the TCP throughput over an OBS layer without burst retransmission. This significant improvement is primarily because the TCP layer triggers fewer time-out based retransmissions when the OBS retransmission scheme is used.
A Comparison of the JIT, JET, and Horizon Wavelength Reservation Schemes on a Single OBS Node
- In Proc. of the First International Workshop on Optical Burst Switching
, 2003
"... We present a detailed analysis of the JIT, JET, and Horizon wavelength reservation schemes for optical burst switched (OBS) networks. Our analysis accounts for several important parameters, including the burst o#set length, and the optical switching and hardware processing overheads associated with ..."
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Cited by 19 (3 self)
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We present a detailed analysis of the JIT, JET, and Horizon wavelength reservation schemes for optical burst switched (OBS) networks. Our analysis accounts for several important parameters, including the burst o#set length, and the optical switching and hardware processing overheads associated with bursts as they travel across the network. The contributions of our work include: (i) analytical models of JET and Horizon (on a single OBS node) that are more accurate than previously published ones, and which are valid for general burst length and o#set length distributions; and (ii) the determination of the regions of parameter values in which a more complex reservation scheme reduces to a simpler one. We compare the performance of the three wavelength reservation schemes on a single OBS node under various sets of parameter values. Our major finding is that, under reasonable assumptions regarding the current and future state-of-the-art in optical switch and electronic hardware technologies, the simplicity of JIT seems to outweigh any performance benefits of Horizon and JET.
Absolute QoS Differentiation in Optical Burst-Switched Networks
, 2003
"... A number of schemes have been proposed for providing QoS differentiation in optical burst-switched (OBS) networks. Most existing schemes are based on a relative QoS model in which the service requirements for a given class of traffic are defined relative to the service requirements of another class ..."
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Cited by 18 (3 self)
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A number of schemes have been proposed for providing QoS differentiation in optical burst-switched (OBS) networks. Most existing schemes are based on a relative QoS model in which the service requirements for a given class of traffic are defined relative to the service requirements of another class of traffic. In this paper, we propose an absolute QoS model that provides a worst-case loss probabilityfor the guaranteed traffic. We describe two mechanisms for providing loss guarantees at OBS core nodes: an early dropping mechanism, which probabilisticallydrops the nonguaranteed traffic, and a wavelength grouping mechanism, which provisions necessary wavelengths for the guaranteed traffic. It is shown that integrating these two mechanisms outperforms other schemes in providing loss guarantees, as well as reducing the loss experienced by the non-guaranteed traffic. We also discuss admission control and resource provisioning for OBS networks, and propose a path clustering technique to further improve the network-wide loss performance. We develop analytical loss models for the proposed schemes and verify the results by simulation.
A Detailed Analysis and Performance Comparison of Wavelength Reservation Schemes for Optical Burst Switched Networks
- JOURNAL OF PHOTONIC NETWORK COMMUNICATIONS
, 2003
"... We present a detailed analysis of the JIT, JET, and Horizon wavelength reservation schemes for optical burst switched (OBS) networks. Our analysis accounts for several important parameters, including the burst offset length, and the optical switching and hardware processing overheads associated wi ..."
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Cited by 18 (0 self)
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We present a detailed analysis of the JIT, JET, and Horizon wavelength reservation schemes for optical burst switched (OBS) networks. Our analysis accounts for several important parameters, including the burst offset length, and the optical switching and hardware processing overheads associated with bursts as they travel across the network. The contributions of our work include: (i) analytical models of JET and Horizon (on a single OBS node) that are more accurate than previously published ones, and which are valid for general burst length and offset length distributions; (ii) the determination of the regions of parameter values in which a more complex reservation scheme reduces to a simpler one; and (iii) a new reservation scheme, JIT , which is as simple to implement as JIT, but whose performance tracks that of Horizon and JET. We compare the performance of the four wavelength reservation schemes on a single OBS node, as well as on a path of OBS nodes with cross traffic, under various sets of parameter values.
