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Brokers
Terms modified by Brokers Selected AbstractsThe Grid Resource Broker workflow engineCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 15 2008M. Cafaro Abstract Increasingly, complex scientific applications are structured in terms of workflows. These applications are usually computationally and/or data intensive and thus are well suited for execution in grid environments. Distributed, geographically spread computing and storage resources are made available to scientists belonging to virtual organizations sharing resources across multiple administrative domains through established service-level agreements. Grids provide an unprecedented opportunity for distributed workflow execution; indeed, many applications are well beyond the capabilities of a single computer, and partitioning the overall computation on different components whose execution may benefit from runs on different architectures could provide better performances. In this paper we describe the design and implementation of the Grid Resource Broker (GRB) workflow engine. Copyright © 2008 John Wiley & Sons, Ltd. [source] HLA real-time extensionCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 15 2004Hui Zhao Abstract The IEEE 1516 Standard ,High Level Architecture (HLA)' and its implementation ,Run-Time Infra-structure (RTI)' defines a general-purpose network communication mechanism for Distributed Interactive Simulation (DIS). However, it does not address real-time requirements of DIS. Current operating system technologies can provide real-time processing through some real-time operating systems (RTOSs) and the Internet is also moving to an age of Quality of Service (QoS), providing delay and jitter bounded services. With the availability of RTOSs and IP QoS, it is possible for HLA to be extended to take advantage of these technologies in order to construct an architecture for Real-Time DIS (RT-DIS). This extension will be a critical aspect of applications in virtual medicine, distributed virtual environments, weapon simulation, aerospace simulation and others. This paper outlines the current real-time technology with respect to operating systems and at the network infrastructure level. After summarizing the requirements and our experiences with RT-DIS, we present a proposal for HLA real-time extension and architecture for real-time RTI. Similar to the growth of real-time CORBA (Common Object Request Broker) after the mature based CORBA standard suite, Real-Time HLA is a natural extension following the standardization of HLA into IEEE 1516 in September 2000. Copyright © 2004 John Wiley & Sons, Ltd. [source] Blending telephony and IPTV: Building the TV-link service package using the Alcatel-Lucent Service BrokerÔBELL LABS TECHNICAL JOURNAL, Issue 1 2007Andre Beck This paper discusses the design and implementation of blended services, composite services whose base component services interact within a common control structure. The paper focuses on blended services that combine aspects of Internet Protocol television (IPTV) and IP Multimedia Subsystem, (IMS)-based telephony services and, in particular, focuses on a service that blends TV viewing and telephone call-handling functions. If a subscriber to this service receives a telephone call while watching TV, the caller ID is displayed on the subscriber's TV screen and the subscriber can signal call control instructions using the set-top box remote control. In this service blend, functions from each base service are coordinated with actions in the other. The mechanism allowing this service is an information channel that allows status and control information to move between the subscriber's set-top box and the IMS system. The services described in this paper are built upon a software foundation called the Alcatel-Lucent Service BrokerÔ platform, a platform that has unique capabilities to support such an information channel and to serve as the gateway between IMS and digital TV. This foundation offers service developers a set of important functions for the creation of blended services. Specifically, the Alcatel-Lucent Service Broker offers a means of controlling the invocation of base services, a means of communicating through different protocols, and support for large-scale deployment and for service customization. © 2007 Alcatel-Lucent. [source] Service capability interaction management in IMS using the Lucent Service BrokerÔ productBELL LABS TECHNICAL JOURNAL, Issue 4 2006Kristin F. Kocan The 3rd Generation Partnership Project/3rd Generation Partnership Project 2 (3GPP/3GPP2) designates the service capability interaction manager (SCIM) as a functional component in the IP Multimedia Subsystem (IMS). This paper focuses on how the Lucent Service BrokerÔ product has been designed and how it would be deployed to perform as a SCIM in an IMS network. We discuss the challenges in managing service capability interaction and providing blended services that are encountered in IMS and show how Lucent Service Broker flexibility is needed to accommodate the breadth of challenges. We describe how the internal structure of the Lucent Service Broker and its application programming interface (API) offer this flexibility while minimizing the effort involved in adding new SCIM logic. We also demonstrate how the Lucent Service Broker may be used to marshal IMS application resources on behalf of revenue-generating applications in various usage scenarios. © 2006 Lucent Technologies Inc. [source] BROKERAGE QUALIFICATIONS IN RINGING OPERATIONS,CRIMINOLOGY, Issue 1 2008CARLO MORSELLI Brokers are fundamental for maintaining flexibility in the networks that embed criminal activities. Our study aims at offering more precision on this key issue by examining the impact that brokers may have on crime-commission processes. To do so, we analyze two stolen-vehicle exportation (or ringing) operations within a framework that merges crime-script analysis and social-network analysis. We assess how diverse degrees of brokerage are distributed across the ringing operations and how the removal of key brokers would have had a disruptive impact by reducing the scope of alternatives for crime-script permutation and flexibility. [source] How broker ability affects institutional trading costsACCOUNTING & FINANCE, Issue 3 2005Carole Comerton-Forde G20 Abstract The present paper shows that broker research and trade execution ability has a significant impact on the cost of institutional trading. The results reveal that there is significant variation in the ability of brokers to control execution costs. Trades executed by brokers with stronger research ability exhibit a higher permanent price impact, whereas those executed by brokers with better execution ability exhibit a lower temporary price impact. Brokers are also found to specialize on an industry level that gives rise to variation in ability within a brokerage house. [source] The end-user application toolkit: a QoS portal for the next generation InternetINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 7 2003Charilaos A. Tsetsekas Abstract The support of quality of service (QoS) in the Internet has become one of the most important topics within the Internet community. The introduction of the Integrated Services (IntServ) and the Differentiated Services (DiffServ) architectures was a major breakthrough in this direction. Enhanced by the Bandwidth Broker concept, DiffServ aims to provide QoS in the Internet through the prioritization of some IP flows over others. However, up to now the DiffServ architecture lacks a standard mechanism for the interaction between users/applications and the Bandwidth Brokers (BB), so that end-to-end QoS can be achieved. In this paper we present a distributed middleware architecture for the transparent support of QoS in the Internet. The paper focuses on bridging the gap that currently exists between applications and the network and presents the end-user application toolkit (EAT). The EAT middleware provides a framework for the presentation of network services to users, the description and selection of QoS parameters, the forwarding of reservation requests and the verification of the accredited QoS level. Through the concept of application profiles, it aims to support QoS for legacy applications, that is, commercial applications that cannot be modified to support QoS. Copyright © 2003 John Wiley & Sons, Ltd. [source] An efficient architecture for Bandwidth Brokers in DiffServ networksINTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 1 2008Ch. Bouras In this article we examine the architecture of an entity used for automatic management and provisioning of resources for DiffServ networks. We examine the existing literature and implementations in this area, focusing on the design choices made, and we propose an architecture for the design of Bandwidth Brokers that combines an adaptive admission control algorithm for increased utilization of network resources and a mechanism for reducing the complexity overhead that intends to be both simple and effective. Specifically, we present a novel architecture for the admission control module that aims at achieving a satisfactory balance between maximizing the resource utilization for the network provider and minimizing the overhead of the module. We complement our theoretical discussion with extensive experimental simulations for the proposed Bandwidth Broker components and analysis of the results. The simulations study the possible configurations of the proposed algorithm and also compare it with alternative admission control policies. Copyright © 2007 John Wiley & Sons, Ltd. [source] The Fall of the House of Roosevelt: Brokers of Ideas and Power from FDR to LBJPRESIDENTIAL STUDIES QUARTERLY, Issue 1 2006Joseph E. Luders No abstract is available for this article. [source] Woolgrowers, Brokers and the Debate over the Sale of the Australian Wool Clip, 1920,1925AUSTRALIAN ECONOMIC HISTORY REVIEW, Issue 1 2001M. J. Keneley Prior to the First World War, the selling of the Australian wool clip rested firmly in the hands of the large woolbroking firms. An agreement between the British and Australian governments during the war saw many of the wool-selling functions of broking firms taken over by the Central Wool Committee. At the conclusion of hostilities, brokers moved to regain their role in the market. However, market conditions had changed. On an international level, traditional trading relationships had broken down, leaving commodity markets unstable and prices unpredictable. On a local level, woolgrowers had benefited from the wartime orderly marketing scheme and the high price guaranteed by the British government for their wool clip. As a result, they had begun to demand a greater role in the selling arrangements of their clip. This paper investigates the debates over the sale of the wool clip in the 1920s and how woolbrokers and growers eventually arrived at an understanding as to the manner in which the market should operate. [source] Information Technology Projects by International Logistics Services Providers: The Case of Canada's Small Customs BrokersCANADIAN JOURNAL OF ADMINISTRATIVE SCIENCES, Issue 1 2006Michael A. Haughton Abstract This study explores the motives and effects of information and communication technology (ICT) investments made by some of Canada's small customs brokers. Like other providers of support services for global supply chain operations, customs brokers have been implored to recognize the significant rewards of effectively deployed ICT. Using qualitative data on eight small Canadian customs brokers, this study determines the extent to which expectation of those rewards motivated the workers' ICT investments. Drawing on institutional theory to complement the analysis, the study finds that the motives transcend belief in ICT projects' inherent utility. This and related findings on the impact of ICT projects on the brokers, extend knowledge concerning the study of important ICT investment decisions in the context of trans-border goods movement. Résumé Cette étude examine les motifs et les effets des investissements rélisés dans la technologie de l'information et de la communication (ICT) par de petits agents en douane canadiens. Comme d'autres fournisseurs d'abonnement de maintenance des opárations de chaîne d'approvision-nements, ces agents étaient invités à identifier les récompenses considérables liées au déploiement efficace de l'ICT. À partir de données qualitatives portant sur huit agents, l'étude s'attelle à déterminer dans quelle mesure l'espérance des récompenses motive les investissements. S'inspirant de la théorie institutionnelle pour compléter l'analyse, l'étude constate que les motifs dépassent la croyance en l'utilité intrinsèque des projets ICT. Cette conclusion et l'impact des projets sur les agents, s'inscrit dans le prolongement des études sur les décisions d'investissement en ICT dans le contexte du commerce transfrontalier. [source] Book reviews Comptes rendusCANADIAN PUBLIC ADMINISTRATION/ADMINISTRATION PUBLIQUE DU CANADA, Issue 4 2004Article first published online: 9 JAN 200 Dream No Little Dreams: A Biography of the Douglas Government of Saskatchewan, 1944,1961. IPAC Series in Public Management and Governance By a.w. johnson, with the assistance of Rosemary Proctor. Federalism in the Forest: National Versus State Natural Resource Policy. American Governance & Public Policy Series By tomas m. koontz. Washington, D.C.: Georgetozorr University Press. Beyond Service: State Workers, Public Policy, and the Prospects for Democratic Administration. IPAC Series in Public Management and Governance By greg mcelligott. Toronto: University of Toronto Press The Regulators: Anonymous Power Brokers in American Politics By cindy skrzycki. New York and Oxford: Rowman & Littlefield Publishers. [source] PERSPECTIVE: SEXUAL CONFLICT AND SEXUAL SELECTION: CHASING AWAY PARADIGM SHIFTSEVOLUTION, Issue 6 2003TOMMASO PIZZARI Abstract., Traditional models of sexual selection propose that partner choice increases both average male and average female fitness in a population. Recent theoretical and empirical work, however, has stressed that sexual conflict may be a potent broker of sexual selection. When the fitness interests of males and females diverge, a reproductive strategy that increases the fitness of one sex may decrease the fitness of the other sex. The chase-away hypothesis proposes that sexual conflict promotes sexually antagonistic, rather than mutualistic, coevolution, whereby manipulative reproductive strategies in one sex are counteracted by the evolution of resistance to such strategies in the other sex. In this paper, we consider the criteria necessary to demonstrate the chase-away hypothesis. Specifically, we review sexual conflict with particular emphasis on the chase-away hypothesis; discuss the problems associated with testing the predictions of the chase-away hypothesis and the extent to which these predictions and the predictions of traditional models of sexual selection are mutually exclusive; discuss misconceptions and mismeasures of sexual conflict; and suggest an alternative approach to demonstrate sexual conflict, measure the intensity of sexually antagonistic selection in a population, and elucidate the coevolutionary trajectories of the sexes. [source] Real Estate Brokerage, Homebuyer Training, and Homeownership Sustainability for Housing Assistance ProgramsFAMILY & CONSUMER SCIENCES RESEARCH JOURNAL, Issue 4 2009Wayne Archer This study examines a previously overlooked factor in the rate of default on home loans by marginal first-time homebuyers; namely, the purchase transaction process. In particular, the study examines the potential for the type of initial contact in a homebuyer assistance program to affect the likelihood of default on a subsequent home loan. Using data from 41 state funded local assistance programs in Florida, the study is able to examine the relationship of program default rates to the source of applicant for assistance. Specifically, it examines the explanatory capacity of the percentage of applicants who had a contract to purchase prior to applying for assistance, indicated that the applicant already has engaged with a broker or lender. It finds that the percentage of applicants for assistance who already have engaged with a broker or lender is very significantly and positively relate to the program default rate. [source] Distributed object-oriented switching system software platform designINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 7 2001Hiroshi Sunaga Abstract Key technologies are presented and evaluated for establishing a distributed object-oriented switching system platform. This platform is based on CORBA, which can enhance software productivity and system scalability and is thus widely used in the information technology field. Conditions and requirements specific to switching systems, such as very high-performance and non-stop operation, are analysed and mapped to the main elements of CORBA. How to deploy and bind objects so as to minimize the processing load is clarified. Mechanisms that guarantee system reliability (saving calls in service when a system failure occurs and avoiding the spread of faults) are also presented. Evaluation of the number of dynamic program steps for systems using fully compliant CORBA, improved CORBA, and a proprietary high-speed object-request broker (ORB) shows that constructing a communication switching system by using the high-speed ORB approach is sufficient, but CORBA-compliant approaches should be used to provide an interoperable interface for communicating with external compliant systems. Copyright © 2001 John Wiley & Sons, Ltd. [source] Architectures and performance evaluation of bandwidth brokersINTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 2 2009Christos Bouras DiffServ is the basis of contemporary QoS-enabled networks. Setting up DiffServ QoS requires extensive engineering effort in dimensioning and provisioning, especially for adjacent networks under different administrations linked in a ,federated' hierarchy. The bandwidth broker is an entity that is responsible for the management of the resources and the QoS service operation in an automated way. In this paper, we present, test and compare two different architectures of bandwidth brokers: a centralized one and a distributed one. We also deal with the inter-domain operation of the bandwidth broker in order to perform end-to-end provisioning. The paper presents the relevant aspects for inter-domain operation of a bandwidth broker and focuses on pathfinding issues. We discuss two models for inter-domain routing through bandwidth brokers, analyzing their advantages and comparing them. Copyright © 2008 John Wiley & Sons, Ltd. [source] Brokering knowledge in organizational networks: The SPN approachKNOWLEDGE AND PROCESS MANAGEMENT: THE JOURNAL OF CORPORATE TRANSFORMATION, Issue 1 2002S. Burnett Over the last three years (at the time of writing this paper) the upstream oil and gas industry has experienced substantial changes at a structural level due a variety of factors including the low cost of oil, depleting reserves, maturing regions, strong competition, and the high costs for development projects. The growing pressure on organizations to operate more economically has led to the recent spate of cost-reduction initiatives including acquisitions, strategic alliances, joint ventures and consortia agreements. Senior management are realizing that it is their intangible assets, in the form of knowledge, which provide the key to their continued success and their company policies are seeking to identify and manage their knowledge base more effectively by implementing a range of initiatives addressing behavioural, process and technological issues. This paper illustrates how, through the use of a knowledge broker, a major project was handled to realize the knowledge potential of the individuals and the team. Main outcomes from the ongoing project include the establishment of understanding and buy-in amongst all the alliance partners to the use of shared measures to align objectives, the development of a management structure to support the performance management system and the maintenance of pace and focus through the provision of dedicated resources. Copyright © 2002 John Wiley & Sons, Ltd. [source] Bridging the Gap: Building Peace Norwegian StylePEACE & CHANGE, Issue 4 2006Ann Kelleher Over the past 25 years, Norway has emerged as an important player in peacemaking efforts. As a small power on the periphery of Europe, it does not command the wherewithal to be a primary broker, but has been able to provide both tangible and intangible resources that have produced a "value-added" component. In this respect, Norwegian initiatives rely upon a judicious blending of the resources of government and the "field experience" garnered at the grassroots level by their NGOs. The close relationship between Norwegian NGOs and the Norwegian government has produced both detailed knowledge and essential channels at many different levels for trust and consensus building. We have in turn characterized the Norwegian approach to conflict resolution as Track I ½ diplomacy because successive Norwegian governments have consciously sought to draw upon the strengths of their NGOs and build upon activities normally described as Track II. [source] Public Sector Added Value: Can Bureaucracy Deliver?PUBLIC ADMINISTRATION, Issue 1 2001Peter.M Jackson This paper takes stock of our understanding of the ,architecture' of public sector resource allocation mechanisms. It is a speculative venture and provides a framework for thinking about issues rather than a completed theoretical model. The concept of architecture is borrowed from the design sciences and is used to explore the conditions of performativity within networks of relational contracts. The age-old question of markets versus hierarchy is too simplistic. Instead, the search is for optimal complex network relationships that are based upon co-operation and participation rather than competition and control. Within these networks the public sector, it is argued, has a new role of acting as a broker in the creation of value. Judging the public sector's relative effectiveness in the creation of value also requires closer attention to be given to the context within which public sector managers take decisions. In particular it is necessary to acknowledge that they confront the ,wicked' problems of society that the electorate demand to be solved. This gives renewed interest in the notion of market failure. [source] Small firm networks: a successful approach to innovation?R & D MANAGEMENT, Issue 3 2002Victoria Hanna This paper considers the increasing trend of inter,working among small firms. Networks of small firms co,operate in certain activities, such as marketing, purchasing, R&D, training or manufacturing. But does co,operation lead to innovation? To answer this question published evaluations of small firms co,operating for mutual benefit are reappraised. Inter,working among small firms is then investigated further by interviewing three network brokers. The brokers were funded by regional governments and they facilitated co,operation between small firms. These semi,structured discussions explored the key characteristics of successful networks, the responsibilities of the broker and the level of innovation occurring. Networking is primarily a competitive response. It needs to evolve into a mechanism to enable small firms to develop innovative products and processes jointly. Small firms may have to rethink their approach to co,operation, and their motives for initiating inter,working if they are to benefit fully from co,operation. [source] The Real Estate Brokerage Market and the Decision to Disclose Property Condition DefectsREAL ESTATE ECONOMICS, Issue 4 2008Jonathan A. Wiley This article presents a theoretical model of the decision to disclose property condition defects by a real estate broker. The model introduces the costs and benefits of disclosure into the broker's profit function. The comparative static results of the model show that a number of factors will have a deterministic influence on the broker's expected profit and, hence, the broker's decision to disclose. Whether voluntary disclosure occurs depends upon the costs of repairing the defect, prevailing market conditions, commission rates and the legal environment in which the broker operates. [source] An Experimental Analysis of the Impact of Intermediaries on the Outcome of Bargaining GamesREAL ESTATE ECONOMICS, Issue 2 2001Abdullah Yavas We conduct an experimental analysis of the bargaining between a buyer and a seller of the exchange of a single good by means of an intermediary or broker. We examine how an intermediary affects the price, the likelihood of a successful negotiation, and the time it takes to complete a negotiation. We first examine the impact of the intermediary as a pure middleman, and then as an information source about the distribution of seller and buyer reservation prices. The results show that an intermediary, whether or not informed, increases the sale price, reduces the likelihood of an agreement, and increases the time to reach an agreement (though the number of bargaining rounds declines). The results suggest that the benefits of brokerage may be predominantly in the matching of buyers and sellers rather than in facilitating bargaining. [source] Dealer Liquidity in an Auction Market: Evidence from the London Stock Exchange,THE ECONOMIC JOURNAL, Issue 522 2007Sylvain Friederich We analyse the trade characteristics and market conditions which determine the market share of a continuous auction trading system at the London Stock Exchange, where a network of broker-dealer firms is also available for trade. We show that execution and information risks govern the choice of execution venue. Further, we uncover strong commonality in the market share of the order book across stocks, and find that variables proxying for market-wide liquidity and informational risks also affect the choice of trading venue. Our results suggest that competing, off-book liquidity suppliers voluntarily perform at least some of the ,stabilisation' functions normally assigned to designated market-makers. [source] The Real Estate Brokerage Market and the Decision to Disclose Property Condition DefectsREAL ESTATE ECONOMICS, Issue 4 2008Jonathan A. Wiley This article presents a theoretical model of the decision to disclose property condition defects by a real estate broker. The model introduces the costs and benefits of disclosure into the broker's profit function. The comparative static results of the model show that a number of factors will have a deterministic influence on the broker's expected profit and, hence, the broker's decision to disclose. Whether voluntary disclosure occurs depends upon the costs of repairing the defect, prevailing market conditions, commission rates and the legal environment in which the broker operates. [source] Middleware for real-time distributed simulationsCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 15 2004Thom McLean Abstract Distributed simulation applications often rely on middleware to provide services to support their execution over distributed computing environments. Such middleware spans many levels, ranging from low-level support for data transmission through object request brokers to higher level, simulation specific functionality such as time management. We discuss design alternatives for realizing such middleware for hard real-time distributed simulations such as hardware-in-the-loop applications. We present the results from tests of a prototype implementation of real-time Run-Time Infrastructure middleware. Its performance is compared with a non-real-time implementation. The context for this work is the High Level Architecture standard that has been defined by the U.S. Department of Defense. Copyright © 2004 John Wiley & Sons, Ltd. [source] BROKERAGE QUALIFICATIONS IN RINGING OPERATIONS,CRIMINOLOGY, Issue 1 2008CARLO MORSELLI Brokers are fundamental for maintaining flexibility in the networks that embed criminal activities. Our study aims at offering more precision on this key issue by examining the impact that brokers may have on crime-commission processes. To do so, we analyze two stolen-vehicle exportation (or ringing) operations within a framework that merges crime-script analysis and social-network analysis. We assess how diverse degrees of brokerage are distributed across the ringing operations and how the removal of key brokers would have had a disruptive impact by reducing the scope of alternatives for crime-script permutation and flexibility. [source] Understanding Remigration and Innovation , An Appeal for a Cultural Economic GeographyGEOGRAPHY COMPASS (ELECTRONIC), Issue 5 2009Claudia Klaerding The acquisition of new knowledge is a crucial capital of highly skilled remigrants and its utilisation in home countries can play a major role for regional economic development. By reviewing the remigration literature it is shown that remigrants are able to create innovation in their home countries and promote regional development. But also theoretical deficits can be identified regarding the structural conditions of transferring new knowledge across regions which precedes potential innovation processes. Recent theoretical ideas cannot sufficiently explain why remigrants become innovative to varying degrees depending on their home regions. A cultural approach of economic geography is needed to highlight the cultural construction of the economy. It allows for remigrants to be perceived as knowledge brokers, which crucially influences the returnee's capacity to innovate. [source] Initiating coverage, broker reputation and management earnings forecasts in AustraliaACCOUNTING & FINANCE, Issue 3 2007Rob Brown G14 Abstract We examine more than 5000 recommendations made by Australian brokers in the period 1996,2001. We find evidence that initiating recommendations produce greater share price responses than continuing recommendations, particularly for hold, underperform and sell recommendations. We also find evidence that initiating recommendations made by higher-reputation brokers and those made in the absence of a management earnings forecast attract different share price responses. Finally, we find that share price responses to initiating recommendations, conditional on the market consensus recommendation, are significantly different to continuing recommendations. [source] How broker ability affects institutional trading costsACCOUNTING & FINANCE, Issue 3 2005Carole Comerton-Forde G20 Abstract The present paper shows that broker research and trade execution ability has a significant impact on the cost of institutional trading. The results reveal that there is significant variation in the ability of brokers to control execution costs. Trades executed by brokers with stronger research ability exhibit a higher permanent price impact, whereas those executed by brokers with better execution ability exhibit a lower temporary price impact. Brokers are also found to specialize on an industry level that gives rise to variation in ability within a brokerage house. [source] Design and evaluation of inter-bandwidth broker signalingINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 8 2008Haci A. Mantar Abstract Bandwidth brokers (BBs) have been proposed for providing end-to-end quality of services (QoS) in differentiated services (Diffserv) networks. As a single entity in each domain, a BB aims at performing both intra- and inter-domain resource management on behalf of its domain. There have been plenty of BB studies for intra-domain resource management. However, how a BB can perform inter-domain resource management in a scalable and deployable manner is still an open issue. In this work, we present the design, implementation and evaluation of an inter-BB communication protocol that is used by each BB to communicate with its neighboring BBs for inter-domain QoS resource management. The proposed model uses a destination-based aggregation scheme in which reservations are aggregated as they merge through the destination region. The destination-based aggregation improves inter-domain state and signaling scalability. The protocol also performs traffic engineering to increase inter-domain resource utilization. The implementation and simulation results verify the achievements of our model. Copyright © 2008 John Wiley & Sons, Ltd. [source] | |||||||||||||||||||||||||||||||