Proactive Surge Protection: A Defense Mechanism for Bandwidth-Based Attacks (2009)
Jerry Chou, Bill Lin, Subhabrata Sen, Oliver Spatscheck
Abstract — Large-scale bandwidth-based distributed denial-of-service (DDoS) attacks can quickly knock out substantial parts of a network before reactive defenses can respond. Even traffic flows...
Coordinated Weighted Sampling for Estimating Aggregates Over Multiple Weight Assignments (2009)
Cohen, Edith, Kaplan, Haim, Sen, Subhabrata
Many data sources are naturally modeled by multiple weight assignments over a set of keys: snapshots of an evolving database at multiple points in time, measurements collected over multiple time...
Exploiting Network Structure for Proactive Spam Mitigation (2009)
Shobha Venkataraman, Subhabrata Sen, Oliver Spatscheck, Patrick Haffner, Dawn Song
E-mail has become indispensable in today’s networked society. However, the huge and ever-growing volume of spam has become a serious threat to this important communication medium. It not only...
Exploiting Network Structure for Proactive Spam Mitigation (2008)
Shobha Venkataraman, Subhabrata Sen, Oliver Spatscheck, Patrick Haffner, Dawn Song
E-mail has become indispensable in today’s networked society. However, the huge and ever-growing volume of spam has become a serious threat to this important communication medium. It not only...
Lee Breslau, Chris Chase, Nick Duffield, Bill Fenner, Yanhua Mao, Subhabrata Sen
The growth of one-to-many applications in enterprise networks is fueling the demand for VPNs to support multicast applications. The deployment of such a Multicast VPN service creates the need for...
Yu Gu, Lee Breslau, Nick Duffield, Subhabrata Sen
We develop techniques for estimating one-way loss from a measurement host to network routers which exploit commonly implemented features on commercial routers and do not require any new router...
Network monitoring for Video Quality over IP (2008)
Amy R. Reibman, Subhabrata Sen
Abstract—In this paper, we consider the problem of predicting application-level video quality based on monitoring video packets within the network. Our goal is to detect impairments (either server-...
ABSTRACT Minimizing Collateral Damage by Proactive Surge Protection (2008)
Jerry Chou, Bill Lin, Subhabrata Sen, Oliver Spatscheck
Existing mechanisms for defending against distributed denial-ofservice (DDoS) attacks are generally reactive in nature. However, the onset of large-scale bandwidth-based attacks can occur suddenly,...
Towards Real-Time Performance Monitoring for Encrypted Traffic Abstract (2008)
Mehdi Kharrazi, Subhabrata Sen, Oliver Spatscheck
IP networks are increasingly carrying mission-critical applications with robust end-to-end network performance and reliability requirements. Network performance monitoring forms an essential...
Patrick Mcdaniel, Subhabrata Sen
Enterprise networks today carry a range of mission critical communications. A successful worm attack within an enterprise network can be substantially more devastating to most companies than attacks...
ANALYZING THE SPATIAL QUALITY OF INTERNET STREAMING VIDEO (2008)
Amy R. Reibman, Subhabrata Sen
The quality of video over the Internet is determined both by the original encoded video quality and by any impairments caused by the network. In this paper, we consider the first of these factors. We...
Patrick Mcdaniel, Subhabrata Sen
Enterprise networks today carry a range of mission critical communications. A successful worm attack within an enterprise network can be substantially more devastating to most companies than attacks...
Online Identification of Hierarchical Heavy Hitters: Algorithms, Evaluation, and Applications (2008)
Yin Zhang, Sumeet Singh, Subhabrata Sen, Nick Duffield, Carsten Lund
In traffic monitoring, accounting, and network anomaly detection, it is often important to be able to detect high-volume traffic clusters in near real-time. Such heavy-hitter traffic clusters are...
On Unbiased Sampling for Unstructured Peer-to-Peer Networks (2008)
Daniel Stutzbach, Reza Rejaie, Nick Duffield, Subhabrata Sen, Walter Willinger
Abstract — This paper presents a detailed examination of how the dynamic and heterogeneous nature of real-world peer-to-peer systems can introduce bias into the selection of representative samples...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Patching and periodic broadcast...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Patching and periodic broadcast...
Online smoothing of live video transmissions (2007)
Subhabrata Sen, Jayanta K. Dey, James F. Kurose, John A. Stankovic, Don Towsley
In this paper, we consider the problem of online smoothing of live video transmissions, where low latency is critical. To address the low latency requirement, our approach is to wait for a small...
Subhabrata Sen, Krithi Ramamritham, John A. Stankovic
In this paper, we consider the problems and benefits of developing an integrated platform that handles the timing requirements of a real-time industrial control application and the processing of...
Incorporation of Multimedia Capabilities in Distributed Real-Time Applications (2007)
Oscar Gonzalez, Subhabrata Sen, Krithi Ramamritham, John A. Stankovic
In this paper, we consider the problems and benefits of developing an integrated platform that handles the timing requirements of a real-time industrial control application and the processing of...
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract--- In this paper, we study streaming multiple videos from a remote server to asynchronous clients through a group of proxies, using multicast on both the wide area server-proxy paths and the...
1 MULTIMEDIA CAPABILITIES IN DISTRIBUTED REAL-TIME APPLICATIONS (2007)
Subhabrata Sen, Oscar Gonzlez, Krithi Ramamritham, John A. Stankovic, Chia Shen, Morikazu Takegaki
In this paper, we consider the problems and benefits of developing the infrastructure needed to handle the timing requirements of a real-time industrial control application and the processing of...
Periodic Broadcast and Patching Services - (2007)
Implementation Measurement And, Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Patching and periodic broadcast...
1 MULTIMEDIA CAPABILITIES IN DISTRIBUTED REAL-TIME APPLICATIONS (2007)
Subhabrata Sen, Oscar Gonzalez, Krithi Ramamritham, John A. Stankovic
INTRODUCTION Distributed real-time industrial control applications can bene#t signi#cantly from the incorporation of multimedia information into the control environment. Potential bene#ts of such...
Configuration management at massive scale: System design and experience (2007)
William Enck, Patrick Mcdaniel, Albert Greenberg, Subhabrata Sen, Panagiotis Sebos, Sylke Spoerel, ...
The development and maintenance of network device configurations is one of the central challenges faced by large network providers. Current network management systems fail to meet this challenge...
Jeffrey Erman, C Jeffrey Erman, Dr. Anirban Mahanti, Dr. Zongpeng Li, Dr. Subhabrata Sen
Identifying and categorizing network traffic by application type is challenging be-cause of the continued evolution of applications, especially of those with a desire to be undetectable. The...
Configuration management at massive scale: System design and experience (2007)
William Enck, Patrick Mcdaniel, Albert Greenberg, Subhabrata Sen, Panagiotis Sebos, Sylke Spoerel, ...
The development and maintenance of network device configurations is one of the central challenges faced by large network providers. Current network management systems fail to meet this challenge...
On Unbiased Sampling for Unstructured Peer-to-Peer Networks (2006)
Daniel Stutzbach, Reza Rejaie, Nick Duffield, Subhabrata Sen, Walter Willinger
Abstract — This paper presents a detailed examination of how the dynamic and heterogeneous nature of real-world peer-to-peer systems can introduce bias into the selection of representative samples...
ACAS: Automated construction of application signatures (2005)
Patrick Haffner, Subhabrata Sen, Oliver Spatscheck, Dongmei Wang
An accurate mapping of traffic to applications is important for a broad range of network management and measurement tasks. Internet applications have traditionally been identified using well-known...
Video Quality Estimation for Internet Streaming (2005)
this paper, we consider the problem of predicting applicationlevel video quality by monitoring video packets within the network. One particular focus is to be able to identify when the encoded...
Analysis of communities of interest in data networks (2005)
William Aiello, Charles Kalmanek, Patrick Mcdaniel, Subhabrata Sen, Oliver Spatscheck
Abstract. Communities of interest (COI) have been applied in a variety of environments ranging from characterizing the online buying behavior of individuals to detecting fraud in telephone networks....
Accurate, Scalable In-Network Identification of P2P Traffic Using Application Signatures (2004)
Sen, Subhabrata, Spatscheck, Oliver, Wang, Dongmei
The ability to accurately identify the network traffic associated with different P2P applications is important to a broad range of network operations including application-specific traffic...
Matthew Roughan, Subhabrata Sen, Oliver Spatscheck, Nick Duffield
The ability to provide different Quality of Service (QoS) guarantees to traffic from different applications is a highly desired feature for many IP network operators, particularly for enterprise...
Accurate, Scalable In-Network Identification of P2P Traffic Using Application Signatures (2004)
Subhabrata Sen, Oliver Spatscheck
The ability to accurately identify the network traffic associated with different P2P applications is important to a broad range of network operations including application-specific traffic...
Class-of-Service Mapping for QoS: A statistical (2004)
Matthew Roughan, Subhabrata Sen, Oliver Spatscheck, Nick Duffield
The ability to provide different Quality of Service (QoS) guarantees to traffic from different applications is a highly desired feature for many IP network operators, particularly for enterprise...
P2P The Gorilla in the Cable (2003)
Re Gerber, Joseph Houle, Han Nguyen, Matthew Roughan, Subhabrata Sen
There is considerable interest in Peer-topeer (P2P) traffic because of its remarkable increase over the last few years. By analyzing flow measurements at the regional aggregation points of several...
Using multicast for streaming videos across wide area networks (2003)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
In this paper, we study streaming multiple videos from a remote server to asynchronous clients through a group of proxies, using multicast on both the wide area server-proxy paths and the local area...
Using multicast for streaming videos across wide area networks (2003)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
In this paper, we study streaming multiple videos from a remote server to asynchronous clients through a group of proxies, using multicast on both the wide area server-proxy paths and the local area...
Using multicast for streaming videos across wide area networks (2003)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract — In this paper, we study streaming multiple videos from a remote server to asynchronous clients through a group of proxies, using multicast on both the wide area server-proxy paths and...
Sketch-based Change Detection: Methods, Evaluation, and Applications (2003)
Er Krishnamurthy, Subhabrata Sen, Yin Zhang, Yan Chen
Traffic anomalies such as failures and attacks are commonplace in today’s network, and identifying them rapidly and accurately is critical for large network operators. The detection typically...
Sketch-based Change Detection: Methods, Evaluation, and Applications (2003)
Balachander Krishnamurthy Subhabrata, Er Krishnamurthy, Subhabrata Sen, Yin Zhang, Yan Chen
Traffic anomalies such as failures and attacks are commonplace in today's network, and identifying them rapidly and accurately is critical for large network operators. The detection typically...
Optimal Proxy Cache Allocation for Efficient Streaming Media Distribution (2002)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract — In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can...
Optimal Proxy Cache Allocation for Efficient Streaming Media Distribution (2002)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract—In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can...
Analyzing Peer-to-Peer Traffic Across Large Networks (2002)
Abstract—The use of peer-to-peer (P2P) applications is growing dramatically, particularly for sharing large video/audio files and software. In this paper, we analyze P2P traffic by measuring...
Optimal Proxy Cache Allocation for Efficient Streaming Media Distribution (2002)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract — In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can...
Analyzing Peer-to-Peer Traffic Across Large Networks (2002)
Abstract---The use of peer-to-peer (P2P) applications is growing dramatically, particularly for sharing large video/audio files and software. In this paper, we analyze P2P traffic by measuring...
Yang Guo, Subhabrata Sen, Don Towsley
The bandwidth-intensive and long-lived nature of high quality digital video make it a challenging problem to transmit such video over the Internet. In this paper, we consider the problem of streaming...
Optimal Proxy Cache Allocation for Efficient (2002)
Streaming Media Distribution, Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can experience playback...
Search Strategies in Inter-Domain Traffic Engineering (2002)
Kartikeya Chandrayana, Kartikeya Ch, Yin Zhang, Matthew Roughan, Subhabrata Sen, Richard Karp
Inter-domain Traffic Engineering (TE) capabilities can significantly improve end-to-end network performance by allowing an ISP to route its traffic around congestion or failure occurring in other ISP...
Optimal Proxy Cache Allocation for Efficient (2002)
Streaming Media Distribution, Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can experience playback...
Streaming Video Traffic: Characterization and Network Impact (2002)
Subhabrata Sen, Charles Kalmanek
The emergence of the Internet as a pervasive communication medium, and the widespread availability of digital video technology have led to the rise of several networked streaming media applications...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client...
Optimal Proxy Cache Allocation for Efficient Streaming Media Distribution (2002)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract — In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can...
Server and proxy services for efficient streaming media delivery over the Internet (2001)
The emergence of the Internet as a pervasive communication medium has fueled a dramatic convergence of voice, video and data on this digital information infrastructure. Demand for streaming media is...
Server and proxy services for efficient streaming media delivery over the Internet (2001)
The emergence of the Internet as a pervasive communication medium has fueled a dramatic convergence of voice, video and data on this digital information infrastructure. Demand for streaming media is...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Prashant Shenoy, Don Towsley, Lixin Gao, ...
Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Jim Kurose, Prashant Shenoy, Don Towsley, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long durations of audio and video clips. Patching and periodic broadcast...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long durations of audio and video clips. Patching and periodic broadcast...
Proxy-based distribution of streaming video over unicast/multicast connections (2001)
Bing Wang, Subhabrata Sen, Micah Adler, Don Towsley
Abstract — In this paper, we address the problem of efficiently streaming a set of heterogeneous videos from a remote server through a proxy to multiple asynchronous clients so that they can...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Patching and periodic broadcast...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gao, Prashant Shenoy, Don Towsley
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long durations of audio and video clips. Patching and periodic broadcast
Periodic Broadcast and Patching Services - (2001)
Implementation Measurement And, Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gaoý, Jim Kurose, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Patching and periodic broadcast...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gaoý, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long durations of audio and video clips. Patching and periodic broadcast...
Michael K. Bradshaw, Bing Wang, Subhabrata Sen, Lixin Gaoý, Jim Kurose, Prashant Shenoy, ...
Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client...
Optimal patching schemes for efficient multimedia streaming (1999)
Subhabrata Sen, Lixin Gao, Jennifer Rexford
Abstract — Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Making streaming...
Frame-based periodic broadcast and fundamental resource tradeoffs (1999)
Subhabrata Sen, Lixin Gao, Don Towsley
Multimedia streaming applications consume significant amounts of server and network resources due to the high bandwidth requirements and long durations of audio and video clips. For popular videos,...
Frame-based periodic broadcast and fundamental resource tradeoffs (1999)
Subhabrata Sen, Lixin Gao, Don Towsley
Multimedia streaming applications consume significant amounts of server and network resources due to the high bandwidth requirements and long duration of audio and video clips. For popular videos,...
Optimal Patching Schemes for Efficient Multimedia Streaming (1999)
Subhabrata Sen, Lixin Gao, Jennifer Rexford, Don Towsley
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Making streaming services...
A Smoothing Proxy Service for Variable-Bit-Rate Streaming Video (1999)
Jennifer Rexford, Subhabrata Sen, Andrea Basso
Provisioning network resources for multimedia streaming is complicated by the bursty, highbandwidth traffic introduced by compressed video, as well as the variability of the throughput, delay, and...
Frame-Based Periodic Broadcast and Fundamental Resource Tradeoffs (1999)
Subhabrata Sen, Lixin Gao, Don Towsley
Multimedia streaming applications consume significant amounts of server and network resources due to the high bandwidth requirements and long duration of audio and video clips. For popular videos,...
Optimal Patching Schemes for Efficient Multimedia Streaming (1999)
Subhabrata Sen, Lixin Gao, Jennifer Rexford, Don Towsley
Multimedia streaming applications consume a significant amount of server and network resources due to the high bandwidth and long duration of audio and video clips. Making streaming services...
Proxy Prefix Caching for Multimedia Streams (1999)
Subhabrata Sen, Jennifer Rexford, Don Towsley
Proxies are emerging as an important way to reduce user-perceived latency and network resource requirements in the Internet. While relaying traffic between servers and clients, a proxy can cache...
A Smoothing Proxy Service for Variable-Bit-Rate Streaming Video (1999)
Jennifer Rexford, Subhabrata Sen, Andrea Basso
Provisioning network resources for multimedia streaming is complicated by the bursty, high-bandwidth traffic introduced by compressed video, as well as the variability of the throughput, delay, and...
Proxy Prefix Caching for Multimedia Streams (1999)
Subhabrata Sen, Jennifer Rexford, Don Towsley
High latency and loss rates in the Internet make it difficult to stream audio and video without introducing a large playback delay. To address these problems, we propose a prefix caching technique...
Using Windows NT for real-time applications: Experimental observations and recommendations (1998)
Krithi Ramamritham, Chia Shen, Oscar Gonzalez, Subhabrata Sen, Shreedhar Shirgurkar
Windows NT was not designed as a real-time operating system, but market forces and the acceptance of NT in industrial applications have generated a need for achieving real-time functionality with NT....
Using Windows NT for real-time applications: Experimental observations and recommendations (1998)
Krithi Ramamritham, Oscar Gonzalez, Subhabrata Sen, Shreedhar Shirgurkar
Windows NT was not designed as a real-time operating system, but market forces and the acceptance of NT in industrial applications have generated aneed for achieving real-time functionality with NT....
Optimal Multicast Smoothing of Streaming Video over an Internetwork (1998)
Subhabrata Sen, Don Towsley, Zhi-Li Zhang, Jayanta K. Dey
A number of applications such as internet video broadcasts, corporate telecasts, distance learning etc. require transmission of streaming video to multiple simultaneous users across an internetwork....
Online Smoothing of Variable-Bit-Rate Streaming Video (1998)
Subhabrata Sen, Jennifer Rexford, Jayanta Dey, James F. Kurose, Don Towsley
Bandwidth smoothing techniques for stored video perform end-end workahead transmission of frames from the video source into the destination client video playback buffer in advance of their display...
Optimal Multicast Smoothing of Streaming Video over an Internetwork (1998)
Subhabrata Sen, Don Towsley, Zhi-Li Zhang, Jayanta K. Dey
A number of applications such as internet video broadcasts, corporate telecasts, distance learning etc. require transmission of streaming video to multiple simultaneous users across an internetwork....
Broadcast on demand: Efficient and timely dissemination of data in mobile environments (1997)
Ping Xuan, Subhabrata Sen, Oscar Gonz Alez, Jesus Fern, Krithi Ramamritham
The demand for efficient, scalable and cost effective mobile information access systems is rapidly growing. Radio frequency broadcast plays a major role in mobile computing, and there is a need to...
Broadcast on demand: Efficient and timely dissemination of data in mobile environments (1997)
Ping Xuan, Subhabrata Sen, Oscar Gonz Alez, Jesus Fern, Krithi Ramamritham
The demand for efficient, scalable and cost effective mobile information access systems is rapidly growing. Radio frequency broadcast plays a major role in mobile computing, and there is a need to...
Online Smoothing of Live Video Transmissions (1997)
Subhabrata Sen, Jayanta K. Dey, James F. Kurose, John A. Stankovic, Don Towsley
In this paper, we consider the problem of online smoothing of live video transmissions, where low latency is critical. To address the low latency requirement, our approach is to wait for a small...
Playback Restart in Interactive Streaming Video Applications (1997)
Jayanta Dey, Subhabrata Sen, James F. Kurose, Don Towsley, James D. Salehi
Low latency is crucial in networked multimedia applications such as on-demand streaming audio and video. In this paper, we consider the problem of restarting or resuming playback following an...
Integrated Scheduling of Multimedia and Hard Real-Time Tasks (1996)
Subhabrata Sen, Krithi Ramamritham
An integrated platform which is capable of meeting the requirements of both traditional real-time control processing and multimedia processing has enormous potential for accommodating various kinds...
Integrated Scheduling of Multimedia and Hard Real-Time Tasks (1996)
Hiroyuki Kaneko, John A. Stankovic, Subhabrata Sen, Krithi Ramamritham
An integrated platform which is capable of meeting the requirements of both traditional real-time control processing and multimedia processing has enormous potential for accommodating various kinds...
A multi-commodity concave cost minimization problem for communication networks. (1972)
Thesis (Ph. D. in Engineering)--University of California, Berkeley, Mar. 1972.