Temat: IP - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: AQUILA network architecture: first trial experiments
Autorzy:: Bąk, A.
Bęben, A.
Burakowski, W.
Dąbrowski, M.
Fudała, M.
Tarasiuk, H.
Kopertowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/309191.pdf
Data publikacji:: 2002
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: IP QoS
pomiary
measurements
Opis:: The paper presents trial experiments with IP QoS network services (NS) defined and implemented in the AQUILA pilot installation. The AQUILA NSs (premium CBR, premium VBR, premium multimedia and premium mission critical) provide a framework for supporting a variety of applications generating both streaming and elastic traffic. The measurement experiments confirm that AQUILA architecture differentiates the QoS offered to these NSs. The presented numerical results were obtained in the test network installed in the Polish Telecom (Warsaw) consisting of 8 CISCO routers.
Źródło:: Journal of Telecommunications and Information Technology; 2002, 2; 3-13
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: On effectiveness of conditional admission control for IP QoS network services with REM scheme
Autorzy:: Dąbrowski, M.
Burakowski, W.
Bęben, A.
Powiązania:: https://bibliotekanauki.pl/articles/309267.pdf
Data publikacji:: 2002
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: QoS IP network
conditional admission control
Opis:: Future IP QoS (quality of service) networks are aiming at differentiating transfer quality of packets belonging to different flows. For this purpose, a set of network services (NS) with different QoS objectives is defined and implemented in the network. To a NS a certain amount of network resources, i.e. dedicated link capacity with associated buffer size, is allocated. Moreover, the resources dedicated for one NS are not available for other NSs. Traditional approach for admission control algorithm corresponding to given NS takes into account current traffic conditions inside considered NS. This can lead to the situation, due to traffic fluctuations, that temporary overloaded NS cannot use the spare bandwidth from underloaded in this time other NSs. This paper describes a conditional admission control algorithm (C-AC), allowing us to admit new packet flow conditionally in the case where no available capacity inside a given NS. For conditionally accepted flow currently unused capacity, dedicated to other NS, is allocated. This can be done only in the case when QoS requirements for both the conditionally accepted flow and the flows in progress are satisfied. The conditions for effective using of C-AC algorithm are discussed in the paper, like characteristics of NS borrowing and lending capacity and their current traffic load. To show potential benefits of the approach, exemplary numerical results are included, corresponding to hypothetical NSs using REM (rate envelope multiplexing) scheme.
Źródło:: Journal of Telecommunications and Information Technology; 2002, 2; 33-39
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: A comparison of ATM and IP QoS network capabilities for handling LAN traffic with QoS differentiation
Autorzy:: Bęben, A.
Burakowski, W.
Pyda, P.
Powiązania:: https://bibliotekanauki.pl/articles/309369.pdf
Data publikacji:: 2003
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: traffic control
IP QoS
asynchronous transfer mode
Opis:: Now, a network operator must choose between two packet switched technologies for providing QoS in WAN networks, which are ATM and IP QoS [3, 4, 9]. As ATM has reached the maturity with capabilities for offering a number of different network services (i.e. CBR, VBR, ABR, UBR, GFR), the IP QoS with network services like expedited forwarding, assured forwarding, etc. is still at developing phase but never-theless is commonly regarded as capable to guarantee in near future similar QoS level as ATM. This paper tries to compare the efficiency of the mentioned technologies (in case of IP QoS network the AQUILA network concept [1, 2] is investigated) for handling traffic generated by LANs with QoS differentiation. This is extremely required since the applications running in LAN differ in QoS requirements and emitted traffic profiles (streaming, elastic). Therefore, a classification process of outgoing LAN traffic into predefined sub-streams should be performed at the entry point to WAN network (edge ATM switch or IP router). Furthermore, particular sub-streams are submitted to adequate WAN network service, available in ATM or IP QoS. The paper presents the experimental results, measured in the test bed, corresponding to QoS level and QoS differentiation provided by ATM and IP QoS core.For this purpose, a set of representative applications currently available to a LAN user was selected demanding from the core different QoS level. They correspond to streaming applications like VoIP with QoS objectives represented mainly by packet delay characteristics and elastic applications controlled by TCP protocol with minimum guaranteed through-put/goodput as target.
Źródło:: Journal of Telecommunications and Information Technology; 2003, 4; 25-31
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Internet Przyszłości - nowa generacja sieci telekomunikacyjnych
Future Internet - new generation telecommunication network
Autorzy:: Burakowski, W.
Powiązania:: https://bibliotekanauki.pl/articles/317390.pdf
Data publikacji:: 2009
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: sieci TCP/IP
architektura DiffServ
architektura NGN
sieci Internet Przyszłości
TCP/IP networks
DiffServ architecture
NGN architecture
Future Internet networks
Opis:: Obecna sieć internet opiera się na stosie protokołów TCP/IP oraz dwóch głównych założeniach: na oferowaniu jednej klasy usług (tj. usługi best effort) oraz przewymiarowaniu sieci. Te założenia projektowe w istotny sposób ograniczają obecnie rozwój sieci internet, uniemożliwiając oferowanie usług wymagających przekazu informacji w czasie rzeczywistym. W artykule przedstawiono wyniki dotychczasowych prac ukierunkowanych na wprowadzenie jakości przekazu pakietów w sieci internet oraz przyjęte na dzień dzisiejszy główne założenia budowy sieci, nazwanej Internet Przyszłości.
Current Internet employs TCP/IP protocol stack and it works under two main principles: best effort class of service is the only one available in the network and network resources are over-dimensioned, if possible. However, the above assumptions limit further evolution of the Internet since such network is not able to assure packet transfer characteristics required by real-time applications. The paper summarizes the results of work aimed At improving quality of packet transfer in the IP-based networks and explains the fundamentals for Future Internet.
Źródło:: Telekomunikacja i Techniki Informacyjne; 2009, 3-4; 117-126
1640-1549
1899-8933
Pojawia się w:: Telekomunikacja i Techniki Informacyjne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: PFS scheme for forcing better service in best effort IP network
Autorzy:: Fudała, M.
Burakowski, W.
Powiązania:: https://bibliotekanauki.pl/articles/308195.pdf
Data publikacji:: 2004
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: IP-based network
better than best effort service
priority forcing scheme
Opis:: The paper presents recent results corresponding to a new strategy for source traffic generating, named priority forcing scheme (PFS), allowing Internet users for getting better than best effort service in IP network. The concept of PFS assumes that an application, called PFS application, sends to the network a volume of additional traffic for the purpose of making the reservations for the data traffic in the overloaded router queues along the packet path in the IP network. The emitted redundant packets, named R-packets, should be rather of small size comparing to the data packets, named D-packets. The PFS scheme assumes that the R-packets waiting in a queue can be replaced by the arriving D-packets and belonging to the same flow. In this way, the D-packets can experience a prioritised service comparing to the packets produced by a non-PFS application. Notice that the proposed solution does not require any quality of service (QoS) mechanisms implemented in the network, like scheduler, dropping, marking etc., except R- and D-packets identification and replacing. We discuss the PFS efficiency for forcing priority in the overloaded conditions. Moreover simple system analysis is also presented. Finally, the profits of using PFS scheme are illustrated by examples corresponding to FTP (TCP controlled traffic) and VoIP (UDP streaming traffic) applications.
Źródło:: Journal of Telecommunications and Information Technology; 2004, 2; 23-28
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "IP" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język