This paper presents a decentralized approach for the autonomic management of a group of collabora... more This paper presents a decentralized approach for the autonomic management of a group of collaborating base stations to provide efficient and effective wireless network access in highly dynamic environments. It provides a management platform that supports many different management functions based on common mechanisms for information exchange, transactional semantics and security. A central feature of the system is the inclusion of monitored feedback information into the autonomic management process, which can enhance the operation of the management system and the quality of its decisions. An integrated monitoring component provides this feedback information by monitoring the coverage area and analyzing the measurements in real time. A preliminary evaluation of the prototype implementation shows that the autonomic management system scales well. Performance is mostly proportional to the diameter of the network topology and does not heavily depend on the number of base stations present. Further experiments with the wireless monitoring sub-system demonstrate that it is feasible to automatically detected network problems caused by radio interference or active attacks.
Proceedings of the 1st ACM workshop on Dynamic interconnection of networks - DIN '05, 2005
TurfNet is a novel internetworking architecture that enables communication among autonomous and h... more TurfNet is a novel internetworking architecture that enables communication among autonomous and heterogeneous network domains. The architecture uses a global identity namespace and does not require global addressing or a shared internetworking protocol. It integrates the new concept of dynamic network composition with other recent architectural concepts, such as decoupling locators from identifiers. This paper examines whether TurfNet's naming and inter-domain routing architecture can scale to networks of the size of the global Internet. The paper uses existing research into the topology of the Internet's autonomous system graph and related results that quantify typical traffic patterns to analyze the scalability and performance of the TurfNet architecture on similar internetwork topologies.
Disruption Tolerant Networking (DTN) is a new area of research to improve network communication w... more Disruption Tolerant Networking (DTN) is a new area of research to improve network communication when connectivity is periodic, intermittent, and/or prone to disruptions. A seminar on DTN was held at at Schloß Dagstuhl, Germany, from 3 to 6 April 2005. Researchers from different fields discussed their approaches to dealing with delays, intermittent connectivity, and the potential non-existence of an end-to-end path in a number of different environments. The two major areas identified were: (1) dealing with delay and disruption in the present Internet in the context of wireless, mobile, and nomadic communications, supporting existing applications and (2) addressing new applications with a focus on exploiting discontinuous connectivity and opportunistic contacts for asynchronous communications. This article briefly reviews the seminar presentations and discussions.
The Internet is currently evolving beyond what its architecture can support. Often, the mechanism... more The Internet is currently evolving beyond what its architecture can support. Often, the mechanisms that allow the Internet to adapt to increasingly conflicting sets of new requirements break some of its basic design principles and can thus severely interfere with end-to- end communication. This paper recognizes that in- creased autonomy of network regions is a key require- ment for future
Simon Schütz, Lars Eggert, Stefan Schmid and Marcus Brunner NEC Europe Ltd, Network Laboratories,... more Simon Schütz, Lars Eggert, Stefan Schmid and Marcus Brunner NEC Europe Ltd, Network Laboratories, Kurfürsten-Anlage 36, 69115 Heidelberg, Germany {schuetz,eggert,schmid,brunner }@netlab.nec.de ABSTRACT Internet users are increasingly mobile. Their hosts are often ...
The Internet architecture is based on design principles such as end- to-end addressing and global... more The Internet architecture is based on design principles such as end- to-end addressing and global routeability. It suits relatively static, well- managed and flat network hierarchies. Recent years have shown, however, that the Internet is evolving beyond what the current architecture can support. The Internet architecture struggles to support increasingly conflicting requirements from groups with competing interests, such as network, content and application service providers, or end-users of fixed, mobile and ad hoc access networks. This paper describes a new internetworking architecture, called TurfNet. It pro- vides autonomy for individual network domains, or Turfs, through a novel in- ter-domain communication mechanism that does not require global network addressing or a common network protocol. By minimizing inter-domain de- pendencies, TurfNet provides a high degree of independence, which in turn fa- cilitates autonomic communications. Allowing network domains to fully oper- at...
Parham Aarabi, University of Toronto, Canada Osama Aboul-Magd, Nortel Networks, Ottawa, Canada Gu... more Parham Aarabi, University of Toronto, Canada Osama Aboul-Magd, Nortel Networks, Ottawa, Canada Guido Albertengo, Politecnico di Torino, Italy Marcelo Amorim, University of Paris , France Kostas G. Anagnostakis, University of Pennsylvania, USA Sebastien Ardon, UNSW, Australia Irena Atov, Swinburne Institute of Technology, Australia J. William Atwood, Concordia University, Canada Valeria Baiamonte, Politecnico di Torino, Italy Adeel Baig, University of New South Wales, Australia Bikram Bakshi, BNX Systems, USA Srivatsan ...
Proceedings of the 5th ACM Multimedia Systems Conference on - MMSys '14, 2014
In this paper, we propose a new rate control algorithm for conversational multimedia flows. In ou... more In this paper, we propose a new rate control algorithm for conversational multimedia flows. In our approach, along with Real-time Transport Protocol (RTP) media packets, we propose sending redundant packets to probe for available bandwidth. These redundant packets are Forward Error Correction (FEC) encoded RTP packets. A straightforward interpretation is that if no losses occur, the sender can increase the sending rate to include the FEC bit rate, and in the case of losses due to congestion the redundant packets help in recovering the lost packets. We also show that by varying the FEC bit rate, the sender is able to conservatively or aggressively probe for available bandwidth. We evaluate our FEC-based Rate Adaptation (FBRA) algorithm in a network simulator and in the real-world and compare it to other congestion control algorithms.
This paper presents a decentralized approach for the autonomic management of a group of collabora... more This paper presents a decentralized approach for the autonomic management of a group of collaborating base stations to provide efficient and effective wireless network access in highly dynamic environments. It provides a management platform that supports many different management functions based on common mechanisms for information exchange, transactional semantics and security. A central feature of the system is the inclusion of monitored feedback information into the autonomic management process, which can enhance the operation of the management system and the quality of its decisions. An integrated monitoring component provides this feedback information by monitoring the coverage area and analyzing the measurements in real time. A preliminary evaluation of the prototype implementation shows that the autonomic management system scales well. Performance is mostly proportional to the diameter of the network topology and does not heavily depend on the number of base stations present. Further experiments with the wireless monitoring sub-system demonstrate that it is feasible to automatically detected network problems caused by radio interference or active attacks.
Proceedings of the 1st ACM workshop on Dynamic interconnection of networks - DIN '05, 2005
TurfNet is a novel internetworking architecture that enables communication among autonomous and h... more TurfNet is a novel internetworking architecture that enables communication among autonomous and heterogeneous network domains. The architecture uses a global identity namespace and does not require global addressing or a shared internetworking protocol. It integrates the new concept of dynamic network composition with other recent architectural concepts, such as decoupling locators from identifiers. This paper examines whether TurfNet's naming and inter-domain routing architecture can scale to networks of the size of the global Internet. The paper uses existing research into the topology of the Internet's autonomous system graph and related results that quantify typical traffic patterns to analyze the scalability and performance of the TurfNet architecture on similar internetwork topologies.
Disruption Tolerant Networking (DTN) is a new area of research to improve network communication w... more Disruption Tolerant Networking (DTN) is a new area of research to improve network communication when connectivity is periodic, intermittent, and/or prone to disruptions. A seminar on DTN was held at at Schloß Dagstuhl, Germany, from 3 to 6 April 2005. Researchers from different fields discussed their approaches to dealing with delays, intermittent connectivity, and the potential non-existence of an end-to-end path in a number of different environments. The two major areas identified were: (1) dealing with delay and disruption in the present Internet in the context of wireless, mobile, and nomadic communications, supporting existing applications and (2) addressing new applications with a focus on exploiting discontinuous connectivity and opportunistic contacts for asynchronous communications. This article briefly reviews the seminar presentations and discussions.
The Internet is currently evolving beyond what its architecture can support. Often, the mechanism... more The Internet is currently evolving beyond what its architecture can support. Often, the mechanisms that allow the Internet to adapt to increasingly conflicting sets of new requirements break some of its basic design principles and can thus severely interfere with end-to- end communication. This paper recognizes that in- creased autonomy of network regions is a key require- ment for future
Simon Schütz, Lars Eggert, Stefan Schmid and Marcus Brunner NEC Europe Ltd, Network Laboratories,... more Simon Schütz, Lars Eggert, Stefan Schmid and Marcus Brunner NEC Europe Ltd, Network Laboratories, Kurfürsten-Anlage 36, 69115 Heidelberg, Germany {schuetz,eggert,schmid,brunner }@netlab.nec.de ABSTRACT Internet users are increasingly mobile. Their hosts are often ...
The Internet architecture is based on design principles such as end- to-end addressing and global... more The Internet architecture is based on design principles such as end- to-end addressing and global routeability. It suits relatively static, well- managed and flat network hierarchies. Recent years have shown, however, that the Internet is evolving beyond what the current architecture can support. The Internet architecture struggles to support increasingly conflicting requirements from groups with competing interests, such as network, content and application service providers, or end-users of fixed, mobile and ad hoc access networks. This paper describes a new internetworking architecture, called TurfNet. It pro- vides autonomy for individual network domains, or Turfs, through a novel in- ter-domain communication mechanism that does not require global network addressing or a common network protocol. By minimizing inter-domain de- pendencies, TurfNet provides a high degree of independence, which in turn fa- cilitates autonomic communications. Allowing network domains to fully oper- at...
Parham Aarabi, University of Toronto, Canada Osama Aboul-Magd, Nortel Networks, Ottawa, Canada Gu... more Parham Aarabi, University of Toronto, Canada Osama Aboul-Magd, Nortel Networks, Ottawa, Canada Guido Albertengo, Politecnico di Torino, Italy Marcelo Amorim, University of Paris , France Kostas G. Anagnostakis, University of Pennsylvania, USA Sebastien Ardon, UNSW, Australia Irena Atov, Swinburne Institute of Technology, Australia J. William Atwood, Concordia University, Canada Valeria Baiamonte, Politecnico di Torino, Italy Adeel Baig, University of New South Wales, Australia Bikram Bakshi, BNX Systems, USA Srivatsan ...
Proceedings of the 5th ACM Multimedia Systems Conference on - MMSys '14, 2014
In this paper, we propose a new rate control algorithm for conversational multimedia flows. In ou... more In this paper, we propose a new rate control algorithm for conversational multimedia flows. In our approach, along with Real-time Transport Protocol (RTP) media packets, we propose sending redundant packets to probe for available bandwidth. These redundant packets are Forward Error Correction (FEC) encoded RTP packets. A straightforward interpretation is that if no losses occur, the sender can increase the sending rate to include the FEC bit rate, and in the case of losses due to congestion the redundant packets help in recovering the lost packets. We also show that by varying the FEC bit rate, the sender is able to conservatively or aggressively probe for available bandwidth. We evaluate our FEC-based Rate Adaptation (FBRA) algorithm in a network simulator and in the real-world and compare it to other congestion control algorithms.
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Papers by Lars Eggert