Georg Post
Bell Labs
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Georg Post.
international conference on networking | 2010
Damiano Carra; Konstantin Avrachenkov; Sara Alouf; Alberto Blanc; Philippe Nain; Georg Post
With the introduction of new generation high speed routers, and with the help of “flow-aware” traffic management, it becomes possible to improve the Quality of Service for users as well as the network efficiency for ISPs. An example of the “flow-aware” traffic management is the Alcatel-Lucent “Semantic Networking” framework where short-lived flows are processed with high priority and long-lived flows are controlled on a per flow basis. In order to control efficiently the flows, it is useful to know an estimate of the Round Trip Time (RTT). In the present work, we provide an online RTT estimation algorithm which is passive and needs one-way traffic only. The one-way traffic requirement is essential for the application of the algorithm for “flow-aware” traffic management inside the network. To the best of our knowledge, there was no online one-way traffic RTT estimators. Tests on a controlled testbed and on the Internet demonstrate high accuracy of the proposed estimator.
broadband communications, networks and systems | 2008
Georg Post; Jean-Michel Houssin; Ludovic Noirie; Pierre Peloso
We describe the dimensioning and benchmarking of packet transport networks with aggregated link capacities up to the Tbit/s range, using a circuit-switching (cross-connect) infrastructure below packet-switching nodes. The different network solutions to be evaluated are designed to carry large numbers of high-definition video and other data streams, with upper bounds on packet latency and packet loss rate for all flows. Trends of evolution are analyzed, based on a performance and cost comparison of several node architectures with different associated transport technologies (packet and circuit layers). Simulations of packet-switch nodes under pseudo-self-similar traffic, extraction of analytical models for latency and loss, end-to-end best path selection, and constrained optimization of crossconnect and packet-switch resources are combined to derive the dimensioning of all the network elements. As a result of this study, photonic cross-connects associated with carrier-grade Ethernet switches appear as the most efficient architectures, thanks to cost savings for transit traffic. Single-layer solutions involving for example only packet-switch routers turn out to be more expensive.
international conference on computer communications | 2009
Dinil Mon Divakaran; Eitan Altman; Georg Post; Ludovic Noirie; Pascale Vicat-Blanc Primet
Looking into the future, this paper presents the effects of having packets of large sizes, called XLFrames (XLFs), in a network. The analysis is motivated by the fact that the Internet is soon to witness stupendous amounts of traffic that have to be processed and switched at amplifying line rates; and this brings forth multiple challenges in the form of energy efficiency, network performance and end-host performance. Increasing the size of packets in the Internet has far-reaching incentives that otherwise appear hard to achieve. We foresee an Internet that multiplexes both packets (sand) and XLFs (rocks). As a first step, we analyse the effects of introducing XLFs in a network, and find the following: (i) the amount of packet-header processing is greatly reduced, (ii) while the fair multiplexing of XLFs with standard packets can be achieved using a careful queue management in routers.
international ifip tc networking conference | 2009
Dinil Mon Divakaran; Eitan Altman; Georg Post; Ludovic Noirie; Pascale Vicat-Blanc Primet
The phenomenal increase in network capacity to hundreds and thousands of Gbits/s in the core as well as Gbits/s at the access, is soon to witness stupendous amounts of packets that have to be processed and switched at amplifying line rates. Looking into the future, we address the need for the integration of packets of larger size, called XLFrames (XLFs), into the future Internet framework. This paper analyses the effects of introducing XLFs in a network that has both packets and XLFs. We evaluate the gains in terms of processing power and throughput. As we observe that XLFs have an impact on loss rate and fairness, we study how, with minimal efforts at routers while keeping the existing protocols (TCP/UDP, IP), XLFs may integrate in the current scenario.
Bell Labs Technical Journal | 2009
Ludovic Noirie; Emmanuel Dotaro; Giovanna Carofiglio; Arnaud Dupas; Pascal Pecci; Daniel Popa; Georg Post
next generation internet | 2008
Ludovic Noirie; Georg Post
International Workshop on Traffic Management and Traffic Engineering for the Future Internet (FITraMEn'08) | 2008
Ludovic Noirie; Emmanuel Dotaro; Giovanna Carofiglio; Arnaud Dupas; Pascal Pecci; Daniel Popa; Georg Post
Archive | 2010
Ludovic Noirie; Georg Post; Silvio Cucchi; Fabio Valente
Archive | 2010
Alberto Blanc; Sara Alouf; Konstantin Avrachenkov; Georg Post
2nd International ICST International Workshop on Network Simulation Tools | 2010
Mouhamad Ibrahim; Eitan Altman; Pascale Vicat-Blanc Primet; Giovanna Carofiglio; Georg Post