Frederic Thiesse - Profile on Academia.edu (original) (raw)

Papers by Frederic Thiesse

Research paper thumbnail of LotTrack: RFID-Based Process Control in the Semiconductor Industry

IEEE Pervasive Computing, 2006

Research paper thumbnail of Understanding the value of integrated RFID systems: a case study from apparel retail

European Journal of Information Systems, 2009

This contribution is concerned with the business value of RFID technology in retail. We present a... more This contribution is concerned with the business value of RFID technology in retail. We present a case study of an RFID project at Galeria Kaufhof, a subsidiary of Metro Group and one of the largest department store chains in Europe. The project encompasses a variety of RFID applications at the interface

Research paper thumbnail of An Overview of EPC Technology

Sensor Review, 2006

Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related ... more Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related RFID standards that are currently being rolled out in the retail industry. Design/methodology/approach -It considers the EPC numbering schemes, air interface protocols, middleware aspects as well as scenarios for practical use. Findings -Identifies possibilities and limitations of EPC standards, the current status of technology adoption and future fields of application. Originality/value -Of interest to those concerned with RFID technology selection and infrastructure development.

Research paper thumbnail of RFID in the Apparel Retail Industry: A Case Study from Galeria Kaufhof

This contribution deals with the business value of radio frequency identification (RFID) technolo... more This contribution deals with the business value of radio frequency identification (RFID) technology in the apparel retail industry. We present a case study of an RFID project at Galeria Kaufhof, a subsidiary of Metro Group and one of the largest department store chains in Europe. The trial shows that operational efficiency gains through the automation of logistical in-store processes, such as inventory counting or goods receipt, are possible. Moreover, RFID enables new customer applications on the sales floor, which allow for a redesign of the customer interface, and thus an improvement of the service processes and the service quality. In addition, the analyses of the gathered data on the sales floor help to close the “data void” between the goods receipt and the point of sales of the department store, thus offering the opportunity to directly observe and analyze physical in-store processes. The RFID data analyses allow for deriving valuable information for the department store management in the areas of inventory management, category management, store layout management , and department store processes .

Research paper thumbnail of Adoption and Diffusion of RFID Technology in the Automotive Industry

Research paper thumbnail of Discovery Service Design in the EPCglobal Network

Discovery Service Design in the EPCglobal Network

The EPCglobal Network, an emerging standard for RFID, aims to raise visibility in supply chains b... more The EPCglobal Network, an emerging standard for RFID, aims to raise visibility in supply chains by enabling interested parties to query item-level data. To get there, however, a critical piece is yet missing: a Discovery Service to identify possibly unknown supply chain actors holding relevant data for specific EPC numbers of individual products. Unfortunately, the Discovery Service architecture as initially conceived by EPCglobal needs revision as it either infringes the confidentiality of participating companies or its use is limited to identifying only participants already known. Against this background, this paper first discuusses the limitations of the architecture under consideration by EPCglobal and presents an alternative, more adequate Discovery Service design. Our concept encourages participation in the network while ensuring information provider confidentiality. Secondly, we present a roadmap for extending the existing EPCglobal Network with two critical services: an automated contract negotiation service and a billing service.

Research paper thumbnail of Extending the EPC network: the potential of RFID in anti-counterfeiting

Research paper thumbnail of CONNECTING MOBILE PHONES TO THE INTERNET OF THINGS

Code tags are two important RFID based solutions which have matured to market-readiness within th... more Code tags are two important RFID based solutions which have matured to market-readiness within the last years. Though both standards are based on the same technological foundation, there are some significant differences as to the goals that their developers intend to achieve through their use. Mobile phones are the most popular personal devices worldwide, with roughly three billion units in operation as of 2006. Market researchers are anticipating that by 2012 20% of all sold phones will be NFC enabled. With 300 million NFC phones sold in 2012, mobile phones would become the largest infrastructure of RFID readers world wide. On the other side, EPC tags will steadily become more available on logistical units and consumer products. The fact that more than a billion consumers might be equipped with NFC enabled mobile phones by 2015 raises the question whether the compatibility of EPC item level tags to these devices would not offer significant benefits. Against this background, this contribution investigates the drivers and barriers of a fusion of NFC and EPC technology, and discusses the resulting potential from a business perspective.

Research paper thumbnail of An Analysis of Data-on-Tag Concepts in Manufacturing

Over timev arious driversa ffectinginformationt echnology architecture design have been proposed ... more Over timev arious driversa ffectinginformationt echnology architecture design have been proposed whichf avored more centralizationo r decentralization. Thel astm ajor shiftt owards centralizations tarted in thel ate1 990s andw as motivated by standardization, integration, andc osti ssues.W ith thea dvento f ubiquitous computing, then exti nflectionp oint headingt owards decentralization mighta rise.T hisp aper aims to improvet he understanding of thedecentralization debate by investigatingthe driversthatinfluence thedesigndecision on whether or not to storedataonatransponderlabel ('tag'). Themanufacturingdomainistaken as an examplefor discussion from whichkey factorsand managementimplications ared erived.T hese form am odelt hatc an guidec ompanies wishingt oi mplement RadioFrequencyIdentification(RFID) on howtodesigntheir applications.

Research paper thumbnail of On the value of location information to lot scheduling in complex manufacturing processes

International Journal of Production Economics, 2008

This research is concerned with the practical use of real-time location systems (RTLSs) in comple... more This research is concerned with the practical use of real-time location systems (RTLSs) in complex manufacturing processes. Starting from the case example of an RFID-based RTLS implementation in a semiconductor fab, we investigate the value of RTLS information on the locations of physical objects in a production system to the problem of efficient job scheduling. For this purpose, we develop a simplified simulation model that captures the main characteristics of the real manufacturing process and propose a set of RTLS-enabled dispatching rules. Our results indicate that the use of RTLS technology provides the opportunity for new levels of process visibility and control in comparison to conventional material-tracking systems. The benefits that can be drawn from the technology include not only an overall acceleration of the existing process but also an additional efficiency gain through novel dispatching rules that take into account real-time information on the logistic processes on the shop floor. r

Research paper thumbnail of An overview of EPC technology

Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related ... more Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related RFID standards that are currently being rolled out in the retail industry. Design/methodology/approach -It considers the EPC numbering schemes, air interface protocols, middleware aspects as well as scenarios for practical use. Findings -Identifies possibilities and limitations of EPC standards, the current status of technology adoption and future fields of application. Originality/value -Of interest to those concerned with RFID technology selection and infrastructure development.

Research paper thumbnail of 12 Connected Smart Appliances

Research paper thumbnail of Zum Einsatz von RFID in der Filiallogistik eines Einzelhändlers: Ergebnisse einer Simulationsstudie

Zum Einsatz von RFID in der Filiallogistik eines Einzelhändlers: Ergebnisse einer Simulationsstudie

ABSTRACT Vor dem Hintergrund des bis heute bestehenden Problems der unzureichenden Regalverfügbar... more ABSTRACT Vor dem Hintergrund des bis heute bestehenden Problems der unzureichenden Regalverfügbar-keit im Handel eröffnet RFID durch eine automatische Erfassung von Warenbewegungen in der Filiale die Möglichkeit, den Prozess der Regalnachbefüllung neu zu gestalten. Dieser Beitrag vergleicht im Rahmen einer Simulationsstudie den herkömmlichen Prozess der Nachbefüllung mit manueller Bestandskontrolle mit einem RFID-gestützten Prozess und analysiert den Ein-fluss einzelner Kostenfaktoren auf das Gesamtergebnis. Dabei zeigt sich, dass der neue Prozess in Abhängigkeit von Leserate und Hardwarekosten in der Lage ist, die Leistungsfähigkeit des bisherigen Prozesses bezüglich Kosteneffizienz und Warenverfügbarkeit zu übertreffen.

Research paper thumbnail of CONNECTING MOBILE PHONES TO THE INTERNET OF THINGS: A DISCUSSION OF COMPATIBILITY ISSUES BETWEEN EPC AND NFC

Code tags are two important RFID based solutions which have matured to market-readiness within th... more Code tags are two important RFID based solutions which have matured to market-readiness within the last years. Though both standards are based on the same technological foundation, there are some significant differences as to the goals that their developers intend to achieve through their use. Mobile phones are the most popular personal devices worldwide, with roughly three billion units in operation as of 2006. Market researchers are anticipating that by 2012 20% of all sold phones will be NFC enabled. With 300 million NFC phones sold in 2012, mobile phones would become the largest infrastructure of RFID readers world wide. On the other side, EPC tags will steadily become more available on logistical units and consumer products. The fact that more than a billion consumers might be equipped with NFC enabled mobile phones by 2015 raises the question whether the compatibility of EPC item level tags to these devices would not offer significant benefits. Against this background, this contribution investigates the drivers and barriers of a fusion of NFC and EPC technology, and discusses the resulting potential from a business perspective.

Research paper thumbnail of Technology, Standards, and Real-World Deployments of the EPC Network

IEEE Internet Computing, 2009

E d it o r s : Fr é d é r ic Th ie s s e • fr e der i c .t hie s se @uni sg.c h Fl o r i a n M ic... more E d it o r s : Fr é d é r ic Th ie s s e • fr e der i c .t hie s se @uni sg.c h Fl o r i a n M ic h a h e ll e s • fmi c ha he l le s@et hz .c h Frédéric Thiesse

Research paper thumbnail of Pervasive RFID and Near Field Communication Technology

IEEE Pervasive Computing, 2007

Today, RFID enjoys enormous interest as the first widely deployed pervasive technology, and Near ... more Today, RFID enjoys enormous interest as the first widely deployed pervasive technology, and Near Field Communication will be the first widely deployed technology enabling humans to communicate with physical objects. This article reports on the Pertec (Pervasive RFID/Near Field Communication Technology and Applications) workshop, which discussed the future evolution of RFID beyond goods identification, including sensor integration, localization, NFC applications, and emerging challenges.

Research paper thumbnail of New class of constant data length retrieval algorithms for video servers with VBR streams

New class of constant data length retrieval algorithms for video servers with VBR streams

We consider the problem of data retrieval from disk storage in video server where the video data ... more We consider the problem of data retrieval from disk storage in video server where the video data are read in constant size blocks. Retrieval algorithms of this type are referred to as constant data length (CDL) retrieval algorithms. We recently introduced a new retrieval algorithm called GCDL that generalizes the CDL retrieval algorithm: GCDL reads for a video stream i during k (DOT) mi, k (epsilon) , consecutive disk rounds a constant size block from the disk, which may results in a large read-ahead requiring a large amount of buffer. In this paper, we propose two new retrieval algorithms called static and dynamic GCDLb that minimize the number of reads during consecutive disk rounds while still maintaining continuous delivery to the client. COmpared to GCDL, we show that GCDLb requires less buffer per client and can admit more clients.

Research paper thumbnail of Statistical Admission Control in Video Servers with Variable Bit-Rate Streams and Constant Time Length Retrieva

Statistical Admission Control in Video Servers with Variable Bit-Rate Streams and Constant Time Length Retrieva

ABSTRACT We consider the admission control problem in video servers for the retrieval of media da... more ABSTRACT We consider the admission control problem in video servers for the retrieval of media data from disk storage. We assume that the I/O bandwidth of the server disk is limited. Given a certain I/O bandwidth, admission control decides whether or not a new client can be accepted without affecting the quality of service promised to the already admitted clients. Assuming variable bit rate (VBR) video streams, we consider an admission control policy with both, deterministic and statistical service guarantees for constant time length retrieval (CTL) and evaluate its performance in terms of the number of clients admitted

Research paper thumbnail of Statistical Admission Control in Video Servers with Constant Data Length Retrieval of VBR Streams

Statistical Admission Control in Video Servers with Constant Data Length Retrieval of VBR Streams

ABSTRACT We consider the admission control problem in video servers for the retrieval of media da... more ABSTRACT We consider the admission control problem in video servers for the retrieval of media data from disk storage. We assume that the I/O bandwidth of the server disk is limited. Given a certain I/O bandwidth, admission control decides whether or not a new client can be accepted without affecting the quality of service promised to the already admitted clients. Assuming variable bit rate (VBR) video streams, we consider an admission control policy with both, deterministic and statistical service guarantees for constant time length retrieval (CTL) and evaluate its performance in terms of the number of clients admitted

Research paper thumbnail of Constant Data Length Retrieval for Video Servers with Variable Bit Rate Streams

Constant Data Length Retrieval for Video Servers with Variable Bit Rate Streams

We define a novel retrieval algorithm for variable bit rate video streams called GCDL that reads ... more We define a novel retrieval algorithm for variable bit rate video streams called GCDL that reads the video data from the disk as constant size data blocks. We formulate for GCDL a deterministic admission control criterion and evaluate its performance. Compared to existing retrieval algorithms, GCDL decreases the buffer requirement and start-up latency while admitting the same number of cli-

Research paper thumbnail of LotTrack: RFID-Based Process Control in the Semiconductor Industry

IEEE Pervasive Computing, 2006

Research paper thumbnail of Understanding the value of integrated RFID systems: a case study from apparel retail

European Journal of Information Systems, 2009

This contribution is concerned with the business value of RFID technology in retail. We present a... more This contribution is concerned with the business value of RFID technology in retail. We present a case study of an RFID project at Galeria Kaufhof, a subsidiary of Metro Group and one of the largest department store chains in Europe. The project encompasses a variety of RFID applications at the interface

Research paper thumbnail of An Overview of EPC Technology

Sensor Review, 2006

Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related ... more Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related RFID standards that are currently being rolled out in the retail industry. Design/methodology/approach -It considers the EPC numbering schemes, air interface protocols, middleware aspects as well as scenarios for practical use. Findings -Identifies possibilities and limitations of EPC standards, the current status of technology adoption and future fields of application. Originality/value -Of interest to those concerned with RFID technology selection and infrastructure development.

Research paper thumbnail of RFID in the Apparel Retail Industry: A Case Study from Galeria Kaufhof

This contribution deals with the business value of radio frequency identification (RFID) technolo... more This contribution deals with the business value of radio frequency identification (RFID) technology in the apparel retail industry. We present a case study of an RFID project at Galeria Kaufhof, a subsidiary of Metro Group and one of the largest department store chains in Europe. The trial shows that operational efficiency gains through the automation of logistical in-store processes, such as inventory counting or goods receipt, are possible. Moreover, RFID enables new customer applications on the sales floor, which allow for a redesign of the customer interface, and thus an improvement of the service processes and the service quality. In addition, the analyses of the gathered data on the sales floor help to close the “data void” between the goods receipt and the point of sales of the department store, thus offering the opportunity to directly observe and analyze physical in-store processes. The RFID data analyses allow for deriving valuable information for the department store management in the areas of inventory management, category management, store layout management , and department store processes .

Research paper thumbnail of Adoption and Diffusion of RFID Technology in the Automotive Industry

Research paper thumbnail of Discovery Service Design in the EPCglobal Network

Discovery Service Design in the EPCglobal Network

The EPCglobal Network, an emerging standard for RFID, aims to raise visibility in supply chains b... more The EPCglobal Network, an emerging standard for RFID, aims to raise visibility in supply chains by enabling interested parties to query item-level data. To get there, however, a critical piece is yet missing: a Discovery Service to identify possibly unknown supply chain actors holding relevant data for specific EPC numbers of individual products. Unfortunately, the Discovery Service architecture as initially conceived by EPCglobal needs revision as it either infringes the confidentiality of participating companies or its use is limited to identifying only participants already known. Against this background, this paper first discuusses the limitations of the architecture under consideration by EPCglobal and presents an alternative, more adequate Discovery Service design. Our concept encourages participation in the network while ensuring information provider confidentiality. Secondly, we present a roadmap for extending the existing EPCglobal Network with two critical services: an automated contract negotiation service and a billing service.

Research paper thumbnail of Extending the EPC network: the potential of RFID in anti-counterfeiting

Research paper thumbnail of CONNECTING MOBILE PHONES TO THE INTERNET OF THINGS

Code tags are two important RFID based solutions which have matured to market-readiness within th... more Code tags are two important RFID based solutions which have matured to market-readiness within the last years. Though both standards are based on the same technological foundation, there are some significant differences as to the goals that their developers intend to achieve through their use. Mobile phones are the most popular personal devices worldwide, with roughly three billion units in operation as of 2006. Market researchers are anticipating that by 2012 20% of all sold phones will be NFC enabled. With 300 million NFC phones sold in 2012, mobile phones would become the largest infrastructure of RFID readers world wide. On the other side, EPC tags will steadily become more available on logistical units and consumer products. The fact that more than a billion consumers might be equipped with NFC enabled mobile phones by 2015 raises the question whether the compatibility of EPC item level tags to these devices would not offer significant benefits. Against this background, this contribution investigates the drivers and barriers of a fusion of NFC and EPC technology, and discusses the resulting potential from a business perspective.

Research paper thumbnail of An Analysis of Data-on-Tag Concepts in Manufacturing

Over timev arious driversa ffectinginformationt echnology architecture design have been proposed ... more Over timev arious driversa ffectinginformationt echnology architecture design have been proposed whichf avored more centralizationo r decentralization. Thel astm ajor shiftt owards centralizations tarted in thel ate1 990s andw as motivated by standardization, integration, andc osti ssues.W ith thea dvento f ubiquitous computing, then exti nflectionp oint headingt owards decentralization mighta rise.T hisp aper aims to improvet he understanding of thedecentralization debate by investigatingthe driversthatinfluence thedesigndecision on whether or not to storedataonatransponderlabel ('tag'). Themanufacturingdomainistaken as an examplefor discussion from whichkey factorsand managementimplications ared erived.T hese form am odelt hatc an guidec ompanies wishingt oi mplement RadioFrequencyIdentification(RFID) on howtodesigntheir applications.

Research paper thumbnail of On the value of location information to lot scheduling in complex manufacturing processes

International Journal of Production Economics, 2008

This research is concerned with the practical use of real-time location systems (RTLSs) in comple... more This research is concerned with the practical use of real-time location systems (RTLSs) in complex manufacturing processes. Starting from the case example of an RFID-based RTLS implementation in a semiconductor fab, we investigate the value of RTLS information on the locations of physical objects in a production system to the problem of efficient job scheduling. For this purpose, we develop a simplified simulation model that captures the main characteristics of the real manufacturing process and propose a set of RTLS-enabled dispatching rules. Our results indicate that the use of RTLS technology provides the opportunity for new levels of process visibility and control in comparison to conventional material-tracking systems. The benefits that can be drawn from the technology include not only an overall acceleration of the existing process but also an additional efficiency gain through novel dispatching rules that take into account real-time information on the logistic processes on the shop floor. r

Research paper thumbnail of An overview of EPC technology

Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related ... more Purpose -This paper aims to provide an overview of the electronic product code (EPC) and related RFID standards that are currently being rolled out in the retail industry. Design/methodology/approach -It considers the EPC numbering schemes, air interface protocols, middleware aspects as well as scenarios for practical use. Findings -Identifies possibilities and limitations of EPC standards, the current status of technology adoption and future fields of application. Originality/value -Of interest to those concerned with RFID technology selection and infrastructure development.

Research paper thumbnail of 12 Connected Smart Appliances

Research paper thumbnail of Zum Einsatz von RFID in der Filiallogistik eines Einzelhändlers: Ergebnisse einer Simulationsstudie

Zum Einsatz von RFID in der Filiallogistik eines Einzelhändlers: Ergebnisse einer Simulationsstudie

ABSTRACT Vor dem Hintergrund des bis heute bestehenden Problems der unzureichenden Regalverfügbar... more ABSTRACT Vor dem Hintergrund des bis heute bestehenden Problems der unzureichenden Regalverfügbar-keit im Handel eröffnet RFID durch eine automatische Erfassung von Warenbewegungen in der Filiale die Möglichkeit, den Prozess der Regalnachbefüllung neu zu gestalten. Dieser Beitrag vergleicht im Rahmen einer Simulationsstudie den herkömmlichen Prozess der Nachbefüllung mit manueller Bestandskontrolle mit einem RFID-gestützten Prozess und analysiert den Ein-fluss einzelner Kostenfaktoren auf das Gesamtergebnis. Dabei zeigt sich, dass der neue Prozess in Abhängigkeit von Leserate und Hardwarekosten in der Lage ist, die Leistungsfähigkeit des bisherigen Prozesses bezüglich Kosteneffizienz und Warenverfügbarkeit zu übertreffen.

Research paper thumbnail of CONNECTING MOBILE PHONES TO THE INTERNET OF THINGS: A DISCUSSION OF COMPATIBILITY ISSUES BETWEEN EPC AND NFC

Code tags are two important RFID based solutions which have matured to market-readiness within th... more Code tags are two important RFID based solutions which have matured to market-readiness within the last years. Though both standards are based on the same technological foundation, there are some significant differences as to the goals that their developers intend to achieve through their use. Mobile phones are the most popular personal devices worldwide, with roughly three billion units in operation as of 2006. Market researchers are anticipating that by 2012 20% of all sold phones will be NFC enabled. With 300 million NFC phones sold in 2012, mobile phones would become the largest infrastructure of RFID readers world wide. On the other side, EPC tags will steadily become more available on logistical units and consumer products. The fact that more than a billion consumers might be equipped with NFC enabled mobile phones by 2015 raises the question whether the compatibility of EPC item level tags to these devices would not offer significant benefits. Against this background, this contribution investigates the drivers and barriers of a fusion of NFC and EPC technology, and discusses the resulting potential from a business perspective.

Research paper thumbnail of Technology, Standards, and Real-World Deployments of the EPC Network

IEEE Internet Computing, 2009

E d it o r s : Fr é d é r ic Th ie s s e • fr e der i c .t hie s se @uni sg.c h Fl o r i a n M ic... more E d it o r s : Fr é d é r ic Th ie s s e • fr e der i c .t hie s se @uni sg.c h Fl o r i a n M ic h a h e ll e s • fmi c ha he l le s@et hz .c h Frédéric Thiesse

Research paper thumbnail of Pervasive RFID and Near Field Communication Technology

IEEE Pervasive Computing, 2007

Today, RFID enjoys enormous interest as the first widely deployed pervasive technology, and Near ... more Today, RFID enjoys enormous interest as the first widely deployed pervasive technology, and Near Field Communication will be the first widely deployed technology enabling humans to communicate with physical objects. This article reports on the Pertec (Pervasive RFID/Near Field Communication Technology and Applications) workshop, which discussed the future evolution of RFID beyond goods identification, including sensor integration, localization, NFC applications, and emerging challenges.

Research paper thumbnail of New class of constant data length retrieval algorithms for video servers with VBR streams

New class of constant data length retrieval algorithms for video servers with VBR streams

We consider the problem of data retrieval from disk storage in video server where the video data ... more We consider the problem of data retrieval from disk storage in video server where the video data are read in constant size blocks. Retrieval algorithms of this type are referred to as constant data length (CDL) retrieval algorithms. We recently introduced a new retrieval algorithm called GCDL that generalizes the CDL retrieval algorithm: GCDL reads for a video stream i during k (DOT) mi, k (epsilon) , consecutive disk rounds a constant size block from the disk, which may results in a large read-ahead requiring a large amount of buffer. In this paper, we propose two new retrieval algorithms called static and dynamic GCDLb that minimize the number of reads during consecutive disk rounds while still maintaining continuous delivery to the client. COmpared to GCDL, we show that GCDLb requires less buffer per client and can admit more clients.

Research paper thumbnail of Statistical Admission Control in Video Servers with Variable Bit-Rate Streams and Constant Time Length Retrieva

Statistical Admission Control in Video Servers with Variable Bit-Rate Streams and Constant Time Length Retrieva

ABSTRACT We consider the admission control problem in video servers for the retrieval of media da... more ABSTRACT We consider the admission control problem in video servers for the retrieval of media data from disk storage. We assume that the I/O bandwidth of the server disk is limited. Given a certain I/O bandwidth, admission control decides whether or not a new client can be accepted without affecting the quality of service promised to the already admitted clients. Assuming variable bit rate (VBR) video streams, we consider an admission control policy with both, deterministic and statistical service guarantees for constant time length retrieval (CTL) and evaluate its performance in terms of the number of clients admitted

Research paper thumbnail of Statistical Admission Control in Video Servers with Constant Data Length Retrieval of VBR Streams

Statistical Admission Control in Video Servers with Constant Data Length Retrieval of VBR Streams

ABSTRACT We consider the admission control problem in video servers for the retrieval of media da... more ABSTRACT We consider the admission control problem in video servers for the retrieval of media data from disk storage. We assume that the I/O bandwidth of the server disk is limited. Given a certain I/O bandwidth, admission control decides whether or not a new client can be accepted without affecting the quality of service promised to the already admitted clients. Assuming variable bit rate (VBR) video streams, we consider an admission control policy with both, deterministic and statistical service guarantees for constant time length retrieval (CTL) and evaluate its performance in terms of the number of clients admitted

Research paper thumbnail of Constant Data Length Retrieval for Video Servers with Variable Bit Rate Streams

Constant Data Length Retrieval for Video Servers with Variable Bit Rate Streams

We define a novel retrieval algorithm for variable bit rate video streams called GCDL that reads ... more We define a novel retrieval algorithm for variable bit rate video streams called GCDL that reads the video data from the disk as constant size data blocks. We formulate for GCDL a deterministic admission control criterion and evaluate its performance. Compared to existing retrieval algorithms, GCDL decreases the buffer requirement and start-up latency while admitting the same number of cli-