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Endpoint admission control: Architectural issues and performance

ACM SIGCOMM COMPUTER communication REVIEW 2000年第4期30卷 57-69页

作者： Breslau, L Knightly, EW Schenker, S Stoica, I Zhang, H AT&T Labs Murray Hill NJ 07974 USA Rice Univ Houston TX 77251 USA ICSI Berkeley CA USA CMU Pittsburgh PA USA

The traditional approach to implementing admission control, as exemplified by the Integrated Services proposal in the IETF, uses a signalling protocol to establish reservations at all routers along the path. While providing excellent quality-of-service, this approach has limited scalability because it requires routers to keep per-flow state and to process per-flow reservation messages. In an attempt to implement admission control without these scalability problems, several recent papers have proposed various forms of endpoint admission control. In these designs, the hosts (the endpoints) probe the network to detect the level of congestion;the host admits the how only if the detected level of congestion is sufficiently low. This paper is devoted to the study of endpoint admission control. We first consider several architectural issues that guide (and constrain) the design of such systems. We then use simulations to evaluate the performance of endpoint admission control in various settings. The modest performance degradation between traditional router-based admission control and endpoint admission control suggests that a real-time service based on endpoint probing may be viable.

关键词： Congestion control (communication)

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Unconstrained signalling in the "Switchless" WDMA/TDMA optical transport network

Unconstrained signalling in the "Switchless" WDMA/TDMA optic...

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Terabit optical networking conference, held at the SPIE International Symposium on Information Technologies 2000

作者： Hill, AM BTexaCT Res TeraLab Ipswich IP5 3RE Suffolk England

ISBN: (纸本)0819438782

Limited signalling capacity imposes severe constraints on the control protocol flexibility of a national-scale WDMA/TDMA "switchless" optical transport network architecture. To signal the maximum number of connection requests for optical packets from the terminals within each transmission frame, out-of-band signalling in dedicated signalling wavelength channels would require at least 12 receivers in each terminal;an excessively expensive proposition. In-band meta-signalling techniques, using all of the network's available wavelength channels, together with temporal manipulation of blocks of wavelength channels by fibre delay line, ensure that the packet connectivity of a future WDMA/TDMA "switchless" optical transport network is completely unconstrained by any signalling limitations, at minimum cost.

关键词： optical transport wavelength router WDMA/TDMA PON signalling meta-signalling optical fibre delay line FTTH FTTK FITCab

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Key distribution for a MLS network architecture

Key distribution for a MLS network architecture

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conference on Mathematics and Applications of Data/Image Coding, Compression, and Encryption III

作者： Newman, R Univ Florida Dept Comp & Informat Sci & Engn Gainesville FL 32611 USA

Multilevel Secure (MLS) systems require mandatory access control (MAC) including a linear lattice (total order) for information flow security. This paper describes an architecture for MLS networking that provides for ... 详细信息

ISBN: (纸本)0819437670

关键词： key distribution MLS MAC secure networking cryptography

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Design and analysis of a WDM client-server network architecture

Design and analysis of a WDM client-server network architect...

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IEEE Global communication conference (GLOBECOM'00)

作者： Wen, Wushao Mukherjee, Biswanath Univ of California Davis CA United States

In this paper, we propose a WDM client-server network architecture based on a passive-star-coupler-based broadcast-and-select network. In this architecture, all down-stream data traffic uses WDM data channels and all up-stream requests, up-stream control messages, and down-stream control messages use an Ethernet channel (control channel). This architecture is broadcast and multicast capable. We propose a detailed point-to-point connection-setup procedure for this architecture. The system's performance is analyzed in terms of whether the control channel or the data channels are the bottleneck. We also analyze the request delay, request's channel-holding time and system throughput following the model description. We conclude that the control channel is not a bottleneck in the system. When the user request rate is high, the server-channel scheduler is the most important adjustable factor to reduce the user response time. An illustrative analysis of FCFS scheduling policy for the system is provided at the end of this paper.

关键词： Client server computer systems

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Software radio: Implementation aspects

Software radio: Implementation aspects

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IEEE/AFCEA EUROCOMM 2000 on Information systems for Enhanced Public Safety and Security

作者： Wolmarans, EM Truter, AJ Alcatel Altech Telecoms ZA-1460 Boksburg South Africa

ISBN: (纸本)078036323X

Software Radio is not a new technology, but an evolution and convergence of existing digital radio and software technologies [1]. The objective of this paper is to characterize the various implementation considerations with regard to software radio, including a brief R&D perspective. The different implementation aspects include those on a system level such as network capabilities, handset/base station issues and power control, and critical component technologies like ADC, DSP and RIF functionality. General issues affecting the process of software radio such as commercialization and standardization are also included.

关键词： 3G mobile communication Computer architecture Digital communication Digital signal processing Licenses Radio frequency Research and development Satellite broadcasting Software radio Telephone sets

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WWICE - An architecture for in-home digital networks

WWICE - An architecture for in-home digital networks

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conference on Multimedia Computing and networking 2000

作者： Baldus, H Baumeister, M Eggenhuisen, H Montvay, A Stut, W Philips Res Labs Aachen Germany

ISBN: (纸本)0819435872

The transition to digital information and networking of new digital devices lead to considerable changes in the consumer electronic industry. New applications will arise, offering more entertainment, comfort and flexibility. To achieve this, complex problems in communication and distributed systems need to be solved. High requirements on stability, usability, quality and price call for new solutions. This paper describes the concept of In-Home Digital networks and will then in detail address the WWICE system. This new architecture provides a coherent system environment for the home. It focuses on services and applications, which can easily be accessed and controlled by the User. Application framework and middleware services of the layered software architecture efficiently support development of IHDN applications as well as flexible application control at runtime.

关键词： In-Home Digital network distributed multimedia application framework middleware graph mapper

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Routing and switching in optical networks: Comparing the benefits of hybrid vs. router-only solutions

Routing and switching in optical networks: Comparing the ben...

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Terabit optical networking conference, held at the SPIE International Symposium on Information Technologies 2000

作者： Chadwick, P Moghaddam, Y Avici Syst N Billerica MA 01845 USA

ISBN: (纸本)0819438782

The public network is rapidly moving from being a voice-optimized network that carries data, to a data-optimized network that will carry multiple services with IP as the predominant traffic. One of the key issues confronting carriers is the balance between circuit switching and packet switching in the core of the network. With the emergence of fast IP switch/routers, it is becoming possible to directly connect all ports on DWDM equipment directly on the router vs. connecting the router to DWDM infrastructure through an optical cross-connect. Comparing the costs of circuit switching and packet switching in the core of the network, a hybrid of packet and circuit switching solution proves more cost-effective than the pure packet switching whenever the port cost of the IP router is more than twice the port cost of the optical, cross-connect. Furthermore, to enable cost effective evolution toward the converged network, the next generation of switching equipment will need to accommodate astronomical growth, while providing carriers with more flexibility in network design.

关键词： Switching Switches network architectures Dense wavelength division multiplexing Circuit switching Packet switching optical networks Time division multiplexing Electrons Astronomy

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High-performance switchless WDM network using multiple free spectral ranges of an arrayed-waveguide grating

High-performance switchless WDM network using multiple free ...

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Terabit optical networking conference, held at the SPIE International Symposium on Information Technologies 2000

作者： Maier, M Reisslein, M Wolisz, A Tech Univ Berlin Telecommun Networks Grp D-10587 Berlin Germany

ISBN: (纸本)0819438782

In this paper, we report on a scalable and reliable switchless wavelength division multiplexing (WDM) network that is based on an arrayed-waveguide grating (AWG). all wavelengths are used for data transmission and signaling is done in-band. Each node at the network periphery is equipped with a single tunable transceiver for data and a broadband light source for control while the network itself is completely passive. Broadcasting is realized by spectrally slicing the broadband signal. The proposed random distributed medium access protocol is reservation based and schedules variably sized data packets on a first-come-first-served and first-fit basis without resulting collisions. The protocol supports both packet and ciruit switching and allows for multicasting. The degree of concurrency is significantly increased by using multiple free spectral ranges (FSRs) of the AWG, spatially reusing wavelengths and transmitting data and control informations simultaneously by means of code division multiplexing. Our analytical results demonstrate that;exploiting multiple FSRs of an AWG significantly improves the throughput-delay performance of the network.

关键词： AWG CDMA MAC multicasting multiple FSRs packet/circuit switching reliability scalability spectral slicing WDM

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An innovative GIS-based telecommunications infrastructure integration system for Schriever Air Force Base cable plant management

An innovative GIS-based telecommunications infrastructure in...

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IEEE/AFCEA EUROCOMM 2000 on Information systems for Enhanced Public Safety and Security

作者： Homjak, AS Howard, WB 300 O'Malley Ave. Suite 73 Schriever AFB 80912-6078 CO United States

ISBN: (纸本)078036323X

due to the exponential increase of data during this "information age" the most basic practices of infrastructure and network architecture management have become increasingly unwieldy. This has been accelerated by the availability of affordable memory storage and the explosive proliferation of enterprise networks in use across all types of commercial, governmental, and military organizations today. Previously considered just an infrastructure service, modern telecommunications has become a world-leading industry, a whole spectrum of new technologies, and in an era where "cyberwarfare" is a reality it is being viewed now as a weapon system by the military. This evolution has placed renewed emphasis on the importance of configuration management ana information security, as data transmissions and command and control functions (C2) become central operational capabilities in their own right. Applying the advantages offered by geographical information system (GIS) techniques and massive programmable databases, we are ready to take the leap from evolutionary to the revolutionary in terms of data accessibility and situational awareness capabilities. The critical link which many organizations and software developers have been independently working on is how to access multiple, diverse datasets (various graphical as well as nonspatial filetypes) in separate locations across a network and read directly into the GIS application one is using. This is the approach the united states air force space command at Schriever Air Force Base (SAFB) is taking to implement its new advanced communications Base Integration System (CBIS) in the year 2000.

关键词： Acceleration Command and control systems communication industry Data communication Defense industry Electrical equipment industry Geographic Information systems Information security Military communication Weapons

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A policy based architecture for guaranteed QoS multimedia services

A policy based architecture for guaranteed QoS multimedia se...

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IEEE Workshop on High Performance Switching and Routing

作者： F. Bernabei L. Gratta R. Pietroiusti Fondazione Ugo Bordoni Rome Italy Telecom Italia S.p.A Rome Italy

One of the most challenging issues in the deployment of multimedia services with real-time requirements over IP-based networks is the possibility to guarantee a given quality of service to the constituent flows involved in the calls. This requires a strict control by network administrators on the network resources actually available and on the identity and profile of the user requiring the service; moreover, the provision of services with guaranteed QoS involves the deployment of accounting and billing systems synchronized with these network control mechanisms especially in the case of real-time billing applications. The object of this paper is the definition of a framework for the cooperation of all the mechanisms (QoS, session control, policy, billing) that contribute to the deployment of the multimedia services over IP-based managed networks.

关键词： Quality of service Protocols Internet telephony control systems Telecommunication control Context-aware services Electronic mail Real time systems Telecommunication network management communication industry

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