Piotr Krawiec

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Jianguo Ding

Blekinge Institute of Technology

David Seamon

Kansas State University

Carlos B Westphall

Universidade Federal de Santa Catarina - UFSC (Federal University of Santa Catarina)

Fabio Cuzzolin

Oxford Brookes University

Benny Nyambo

University of Zimbabwe

Viacheslav Kuleshov

Stockholm University

Mohammed Najm Abdullah Al Salam

University of Technology/Iraq

Mohammed Farik

University of Fiji

Rory Smead

Northeastern University

Jamil Ahmed

Visvesvaraya Technological University

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Papers by Piotr Krawiec

On delimiting video rebuffering for stream-switching adaptive applications

by Jordi Mongay Batalla and Piotr Krawiec

2015 IEEE International Conference on Communications (ICC), 2015

ABSTRACT Most of the current adaptation algorithms assess download rate, or trace playout buffer ... more ABSTRACT Most of the current adaptation algorithms assess download rate, or trace playout buffer occupancy to adapt video representation. We propose a novel approach for switching video representation based on the estimated probability of video rebuffering. This probability is calculated using an analytical model of playout buffer and measured segment download time characteristics. The results of simulation experiments and prototype trials, carried out in a controlled network environment and over the Internet, show that our method efficiently accommodates changing network conditions.

Content Aware Network Based on Virtual Infrastructure

by Jordi Mongay Batalla, Piotr Krawiec, and L. Lopatowski

2012 13th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing, 2012

ABSTRACT This paper presents the Content Aware Network designed as one of the Parallel Internets ... more ABSTRACT This paper presents the Content Aware Network designed as one of the Parallel Internets developed on Virtual Infrastructure. The CAN is a post-IP network designed to facilitate access to multimedia content in large scale environment. We introduce the proposed CAN network architecture and discuss mechanisms and algorithms required to assure ubiquitous content access and efficient content delivery. In particular, we propose new content naming and resolution schemes, an effective content source selection algorithm, which optimize resource utilization and the flexible content delivery method. Moreover, we present developed prototype and numerical results illustrating effectiveness of proposed CAN delivery method.

Resource allocation strategies for new connections in QoS multi-domain networks with signaling capabilities

2007 Australasian Telecommunication Networks and Applications Conference, 2007

Before accepting a new connection in QoS networks we need to check if the amount of required reso... more Before accepting a new connection in QoS networks we need to check if the amount of required resources is available on the path from the source to the destination. In the case of QoS multi-domain networks, we need to make resource reservations in each domain on that path, as it has a place e.g. in EuQoS system. Choosing optimal strategy

Internet Przyszłości-nowe wyzwanie dla telekomunikacji (i nie tylko)

Why is IPv6 deployment important for the internet evolution?

by Jordi Mongay Batalla, Piotr Krawiec, Karol Chudzik, and Józef Woźniak

Replacing the IPv4 protocol with IPv6 on the Internet is currently one of the aims of the Europea... more Replacing the IPv4 protocol with IPv6 on the Internet is currently one of the aims of the European Union policy. The main reason for this replacement is the effeteness of the addresses pool in the IPv4 protocol, which can cause serious complications in the evolution of the Internet and its adaptation in new areas, e.g., in next generation mobile telephony or the so called Internet of Things. Simultaneously, the addressing capabilities of the IPv6 protocol are practically unlimited and its new functionalities increase the attractiveness of its usage. The article discusses the problems connected with the IPv6 deployment on the Internet. Especially, the rules for realization of the IPv6 deployment and rules for cooperation of IPv4 with IPv6 (including cooperation tests) in network infrastructure and in applications are presented. Moreover, the European projects' results and the activity's directions of the national project Future Internet Engineering are discussed.

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On Implementing IPTV Platform with IPv4 and IPv6 Devices

by Piotr Krawiec and Jordi Mongay Batalla

The end of IPv4 addresses is now a reality. Providers not updated to IPv6 will have to hurry up t... more The end of IPv4 addresses is now a reality. Providers not updated to IPv6 will have to hurry up the IPv6 start in its own network. Introduction of IPv6 means not only change of main routers but also change of mentality in operators, applications' programmers besides end users. Even when for the last years the core network is prepared for transferring IPv6 traffic, other built-in parts of the Internet limit the IPv6 start. Examples of these limitations we find in not IPv6-awareness of many applications and services. For instance, voice over IP service, which uses session initiation protocol (SIP) needs to implement IPv6 aware SIP proxies and IPv6 aware AAA (authentication, authorization and accounting) servers as well as adapting application programming interfaces to IPv6. Internet protocol television (IPTV) system includes many different hardware devices, which not always are IPv6 compatible. In this paper, we propose a global solution for integrating all the devices, these one working on IPv4 and these one working on IPv6, under the same IPTV platform. This solution allows end users to receive IPTV stream irrespective of IP protocol used. The proposed solution is particularly relevant for small IPTV systems, which, step by step, are adapting into IPv6.

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ID layer for Internet of Things based on Name-Oriented Networking

by Piotr Krawiec and Jordi Mongay Batalla

ABSTRACT Object and service identification is considered as one of the main challenges in the fie... more ABSTRACT Object and service identification is considered as one of the main challenges in the field of Internet of Things (IoT), which can be solved by the introduction of the so called ID (IDentifier) layer. The objective of this layer is to expose IoT objects and services offered by them, to users. Common approach for ID layer is to create it in overlay manner, on the top of existing network. This paper presents a novel architecture of the ID layer, which is characterized by embedding ID layer functionality into the network plane. Moreover, this approach takes advantage of the Name-Oriented Networking (NON) paradigm. To gain easy access to the IoT objects and services, as well as native support for multicast service, human readable ID-based unified addressing with hierarchical structure was exploited. Additionally, in-network caching of forwarded IoT data, inherited from the NON, helps to reduce total network load and supports applications during collaboration with energy-constrained sensors. Such sensors may enter sleep mode to save energy and then the network nodes can serve requests for sensing data, arrived from applications, by using data stored in nodes&#39; cache. The paper shows the concept of NON-based ID layer and describes functional architecture of network node paying attention on modules and mechanisms related with ID layer functionality. Primary ID layer processes, i.e., object/service registration, resolution and data forwarding are explained in detail. Moreover, the ID-aware network node was implemented on Linux-based platform and tested to check its forwarding characteristics. The tests showed the performance of the of ID network node in data plane operations, which are the more sensitive for scalability issues.

Dynamic seamless handover of video servers

by Piotr Krawiec, Jordi Mongay Batalla, and L. Lopatowski

ABSTRACT Management of content servers enables to lower the probability of congestion and overloa... more ABSTRACT Management of content servers enables to lower the probability of congestion and overload situations in the network as well as dealing with such situations if they occur. Hence the overall quality of media delivery experienced by the end users is improved. In this paper we propose an integrated system for adapting the content servers that is capable of analyzing current network conditions (fault reporting) and providing suggestions to solve potential issues. The system is able to adjust content provisioning and improve the content server selection process; however, the most innovative area of the system is the seamless handover mechanism of on-going connections that allows for on-the-fly switching of content source without noticeable disruptions in the content delivery. The proposed seamless handover solutions for two popular protocols for video delivery, namely HTTP and RTSP/RTP, are examined and the results of conducted tests are provided.

On assuring QoS in Ethernet access network

International Conference on Networking and Services (ICNS '07), 2007

... Since the capacity C2 is lower than the half of capacity C1 RateTelephony, TCP sources can ... more

On developing efficient unmanaged services in Content Aware Networks

by Piotr Krawiec and Jordi Mongay Batalla

2014 International Conference on Smart Communications in Network Technologies (SaCoNeT), 2014

ABSTRACT This paper proposes advanced functionalities of the service management inside of a Conte... more ABSTRACT This paper proposes advanced functionalities of the service management inside of a Content Aware Networking oriented ecosystem directed to implement unmanaged (without Quality of Service assurance) services. The Service Manager incorporates knowledge about User (profile and context), Content and Network, which allows novel mechanisms focused on the dynamic switching of the content source and delivery path when a fault is located in the server side. The final goal is to improve the complete service life-cycle, with special attention to (media) content delivery process for high quality multimedia experience.

PL-LAB: Polish Future Internet Distributed Laboratory

by Piotr Krawiec and Ł. Dolata

2012 13th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing, 2012

Abstract—In this paper we present the PL-LAB, which is a Polish nationwide network testbed involv... more

EmPath: Tool to Emulate Packet Transfer Characteristics in IP Network

Lecture Notes in Computer Science, 2010

The paper describes the EmPath tool that was designed to emulate packet transfer characteristics ... more The paper describes the EmPath tool that was designed to emulate packet transfer characteristics as delays and losses in IP network. The main innovation of this tool is its ability to emulate packet stream transfer while maintaining packet integrity, packet delay and loss distribution and correlation. In this method, we decide about the fate of new packet (delay and loss) by using the conditional probability distributions depending on the transmission characteristics of the last packet. For this purpose, we build a Markov model with transition probabilities calculated on the basis of the measured packet traces. The EmPath tool was implemented as a module of the Linux kernel and its capabilities were examined in the testbed environment. In the paper, we show some results illustrating the effectiveness of EmPath tool.

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Provision of end-to-end QoS in heterogeneous multi-domain networks

by Piotr Krawiec and Jordi Mongay Batalla

annals of telecommunications - annales des télécommunications, 2008

In this paper, we present the framework to provision end-to-end QoS in heterogeneous multi-domain... more In this paper, we present the framework to provision end-to-end QoS in heterogeneous multi-domain networks that was implemented in EuQoS system and tested in Pan-European research network. It assumes that a pair of end users, possibly attached to different access networks as xDSL, UMTS, LAN/Ethernet, WiFi, MPLS or Satellite, may choose for its connection an appropriate endto-end Class of Service, depending on the application they use, e.g. VoIP, VoD, FTP, etc. Each end-to-end Class of Service has its own traffic control mechanisms and algorithms and, as a result, it has the ability to handle traffic streams with assumed guarantees for packet transfer characteristics expressed in the form of loss ratio, mean delay and delay variation. The end-to-end Classes of Service are supported in all the domains (including interdomain links) independently using specialised inter-domain Class of Service-aware QoS routing protocol which establishes the end-to-end QoS paths. This paper describes the solution and includes exemplary simulation and experimental results.

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Scenarios for Virtual QoS Link implementation in IP networks

Abstract: This paper deals with scenarios for establishing Virtual Links (VL) in IP networks. The... more

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Conception of ID layer performance at the network level for Internet of Things

by Piotr Krawiec and Jordi Mongay Batalla

Personal and Ubiquitous Computing, 2014

This paper proposes a novel architecture of the ID (IDentifier) layer for Internet of Things, whi... more This paper proposes a novel architecture of the ID (IDentifier) layer for Internet of Things, which is embedded in the network level instead of traditional overlay solutions. Our contribution characterizes development of human-readable, hierarchical ID-based unified addressing for both objects and services, corresponding to their locations. In this way, users gain easier access to the IoT resources and native support for multicast. Furthermore, we take advantage of the Networking Named Content approach to specify rules for ID-based data transfer. The network nodes have capabilities to cache forwarded data for handling future requests, what may decrease network overload and facilitate cooperation between applications and sensors which periodically move into sleep mode for saving energy. ID-based routing offers decoupling of identification of objects/services from their location. Awareness of forwarded IoT data together with hierarchical distribution of the network makes feasible the local management of users and objects, that is, the essential IoT processes such as object/service registration, publication, searching and resolution can be managed locally in the network node. This offers high flexibility and manageability and improves response of the system when the number of handled things scales. The paper presents the architecture of the proposed solution for ID layer focusing on modules and mechanisms of the ID network node, as well as detailed description of registration, resolution and forwarding processes. Furthermore, the implementation of the system, performed on Linux-based routers, was tested to confirm the correctness of ID layer processes. The tests show that the performance of ID network node is not worse than the performance of a classical IP Linux router running on an identical physical device.

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On delimiting video rebuffering for stream-switching adaptive applications

by Jordi Mongay Batalla and Piotr Krawiec

2015 IEEE International Conference on Communications (ICC), 2015