TY - CHAP AU - Máté, Miklós AU - Vida, Rolland AU - Császár, András AU - Mihály, Attila ED - Matera, F ED - Listanti, M ED - Pioro, M ED - Rak, J TI - Offloading Video Servers: P2P and/or Caches? T2 - 2012 15th International Telecommunications Network Strategy and Planning Symposium (NETWORKS) PB - IEEE Computer Society Press CY - New York, New York SN - 9781467313902 PY - 2012 SP - 400 EP - 405 PG - 6 DO - 10.1109/NETWKS.2012.6381722 UR - https://m2.mtmt.hu/api/publication/2695139 ID - 2695139 AB - Using a decentralized content distribution scheme is appealing when considering the potentially enormous amount of data generated by high quality video on demand (VoD) services. There is, unfortunately, little information available about which form of content delivery would yield maximum benefit and how it should be configured to achieve that, given a certain cost structure and request distribution. In this paper we investigate the properties of a VoD streaming system, where the clients download stored videos from dedicated servers, but want to start watching them while downloading. We analyze how the servers can be offloaded by a P2P data distribution network, and whether adding network caches can further optimize the system, or not. We show that the parameters of the P2P scheme can be set in an optimal way, though, we notice that even a large deviation from the optimum doesn't decrease the offloading performance significantly. The offloading can be increased at the expense of the startup delay, but by adding caches we can achieve both high performance and low startup delays. LA - English DB - MTMT ER - TY - CHAP AU - Rétvári, Gábor AU - Csernátony, Zoltán AU - Kőrösi, Attila AU - Tapolcai, János AU - Császár, András AU - Enyedi, Gábor Sándor AU - Gergely, Pongrácz ED - Kandula, Srikanth TI - Compressing IP Routing Tables for Fun and Profit T2 - 11th ACM Workshop on Hot Topics in Networks (HotNets-XI) PB - ACM Press CY - New York, New York SN - 9781450317764 PY - 2012 SP - 1 EP - 6 PG - 6 DO - 10.1145/2390231.2390232 UR - https://m2.mtmt.hu/api/publication/2687895 ID - 2687895 LA - English DB - MTMT ER - TY - CHAP AU - Rétvári, Gábor AU - Csikor, Levente AU - Tapolcai, János AU - Enyedi, Gábor Sándor AU - Császár, András ED - Jajszczyk, Andrzej TI - Optimizing IGP link costs for improving IP-level resilience T2 - 2011 8th International Workshop on the Design of Reliable Communication Networks (DRCN) PB - IEEE CY - Piscataway (NJ) SN - 9781612841243 PY - 2011 SP - 62 EP - 69 PG - 8 DO - 10.1109/DRCN.2011.6076886 UR - https://m2.mtmt.hu/api/publication/2663668 ID - 2663668 LA - English DB - MTMT ER - TY - CHAP AU - Rétvári, Gábor AU - Tapolcai, János AU - Enyedi, Gábor Sándor AU - Császár, András ED - Kartik, Gopalan TI - IP Fast ReRoute: Loop Free Alternates Revisited T2 - 2011 Proceedings IEEE INFOCOM PB - IEEE Press CY - Piscataway (NJ) SN - 1457702487 PY - 2011 SP - 2948 EP - 2956 PG - 9 DO - 10.1109/INFCOM.2011.5935135 UR - https://m2.mtmt.hu/api/publication/2660756 ID - 2660756 N1 - WoS:hiba:000297374703034 2020-08-27 06:52 befoglaló egyiknél nincsenek szerzők, befoglaló cím nem egyezik LA - English DB - MTMT ER - TY - JOUR AU - Kőrösi, Attila AU - Székely, Balázs AU - Császár, András TI - TrueVoD: Streaming or Progressive Downloading? JF - IEEE COMMUNICATIONS LETTERS J2 - IEEE COMMUN LETT VL - 14 PY - 2010 IS - 11 SP - 1083 EP - 1085 PG - 3 SN - 1089-7798 DO - 10.1109/LCOMM.2010.091310.100567 UR - https://m2.mtmt.hu/api/publication/2664251 ID - 2664251 LA - English DB - MTMT ER - TY - CHAP AU - Csernai, Márton László AU - Gulyás, András AU - Rétvári, Gábor AU - Heszberger, Zalán AU - Császár, András TI - The Skeleton of the Internet T2 - 2010 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE GLOBECOM 2010 PB - IEEE CY - New York, New York SN - 9781424456376 T3 - IEEE Global Telecommunications Conference (Globecom) PY - 2010 PG - 5 DO - 10.1109/GLOCOM.2010.5684319 UR - https://m2.mtmt.hu/api/publication/2661824 ID - 2661824 N1 - WoS:hiba:000287977406102 2020-08-26 03:53 befoglaló egyiknél nincsenek szerzők AB - Research works concerning AS (Autonomous Systems) level Internet topology measurements typically aim at obtaining near-complete maps of the AS structure. In this paper, we take a fundamentally different approach by inspecting several concurrently visible local views of the AS graph stored at individual BGP route servers. We find that each of these views exhibits the characteristic properties of complex graphs having power-law degree distribution, large clustering coefficient and the small world property. As a main contribution, the intersection of these views is investigated to identify the skeleton of the Internet consisting of edges seen by most of the ASes. Our measurements support the surprising claim that this skeleton is a scale-free complex network, having a giant connected component with a dense part in its heart forming the critical AS level core. We identify the edges in the skeleton as critical infrastructure, any changes of which induces an Internet-wide effect with BGP updates propagating to all ASes. Finally, we reinterpret the path inflation metric using the local view approach and show that local path inflation can be very diverse in different ASes. ©2010 IEEE. LA - English DB - MTMT ER - TY - GEN AU - Császár, András AU - Enyedi, Gábor Sándor TI - A System and Method of Implementing Lightweight Not-via IP Fast ReRoutes in a Telecommunications Network PY - 2010 UR - https://m2.mtmt.hu/api/publication/2660765 ID - 2660765 LA - English DB - MTMT ER - TY - PAT AU - Kőrösi, Attila AU - Székely, Balázs AU - Császár, András AU - Lukovszki, Csaba AU - Ayodele, Damola AU - Kiss, Ákos TI - Supporting Functions for Quality P2P VoD Service CY - Country:10017(13) PY - 2010 UR - https://m2.mtmt.hu/api/publication/2650538 ID - 2650538 LA - English DB - MTMT ER - TY - CHAP AU - Zahemszky, András AU - Császár, András AU - Nikander, P AU - Rothenberg, C E TI - Exploring the Pub/Sub Routing & Forwarding Space T2 - IEEE International Conference on Communications (IEEE ICC-2009 and MACOM-2009 Workshop Proceedings) PB - IEEE CY - Piscataway (NJ) SN - 9781424434367 PY - 2009 PG - 6 DO - 10.1109/iccw.2009.5207980 UR - https://m2.mtmt.hu/api/publication/2665824 ID - 2665824 N1 - : DOI - 10.1109/ICCW.2009.5207980 LA - English DB - MTMT ER - TY - GEN AU - Császár, András AU - Enyedi, Gábor Sándor TI - Link failure recovery method and apparatus PY - 2009 UR - https://m2.mtmt.hu/api/publication/2660764 ID - 2660764 LA - English DB - MTMT ER -