1 Towards an Architecture for Efficient Spectrum Slicing (2009)
Suman Banerjee, Arunesh Mishra, Vladimir Brik, Vivek Shrivastava, Paramvir Bahl
With the increased demands for wireless spectrum, dynamic spectrum sharing is emerging as an important and powerful concept. Most research in this domain is being conducted in design of cognitive...
A Case for Adapting Channel Width in Wireless Networks (2009)
Ranveer Ch, Ratul Mahajan, Thomas Moscibroda, Ramya Raghavendra, Paramvir Bahl
We study a fundamental yet under-explored facet in wireless communication – the width of the spectrum over which transmitters spread their signals, or the channel width. Through detailed...
A Case for Adapting Channel Width in Wireless Networks (2009)
Ranveer Ch, Ratul Mahajan, Thomas Moscibroda, Ramya Raghavendra, Paramvir Bahl
We study a fundamental yet under-explored facet in wireless communication – the width of the spectrum over which transmitters spread their signals, or the channel width. Through detailed...
ABSTRACT Allocating Dynamic Time-Spectrum Blocks In Cognitive Radio Networks (2009)
Yuan Yuan, Paramvir Bahl, Ranveer Ch, Thomas Moscibroda, Yunnan Wu
A number of studies have shown the abundance of unused spectrum in the TV bands. This is in stark contrast to the overcrowding of wireless devices in the ISM bands. A recent trend to alleviate this...
ABSTRACT Reconsidering Wireless Systems with Multiple Radios (2008)
Paramvir Bahl, Atul Adya, Jitendra Padhye, Alec Wolman
The tremendous popularity of wireless systems in recent years has led to the commoditization of RF transceivers (radios) whose prices have fallen dramatically. The lower cost allows us to consider...
KNOWS: Kognitiv Networking Over White Spaces (2008)
Yuan Yuan, Paramvir Bahl, Ranveer Ch, Philip A. Chou, John Ian Ferrell, Thomas Moscibroda, ...
has announced that it is willing to consider unlicensed operation in the TV broadcast bands. Compared to the ISM bands, this portion of the spectrum has several desirable properties for robust data...
The usage and service options of a pubic network generally differ from a private (enterprise or home) network and consequently, the two networks are often configured differently. The existence of...
Troubleshooting Wireless Mesh Networks (2008)
Lili Qiu, Paramvir Bahl, Ananth Rao, Lidong Zhou
Effective network troubleshooting is critical for maintaining efficient and reliable network operation. Troubleshooting is especially challenging in multi-hop wireless networks because the behavior...
The wide-scale deployment of IEEE 802.11 wireless networks has generated significant challenges for Information Technology (IT) departments in corporations. Users frequently complain about...
ABSTRACT Troubleshooting Wireless Mesh Networks (2008)
Lili Qiu, Paramvir Bahl, Ananth Rao, Lidong Zhou
Effective network troubleshooting is critical for maintaining efficient and reliable network operation. Troubleshooting is especially challenging in multi-hop wireless networks because the behavior...
Abstract Optimizing Resource Utilization in Wireless Multimedia Networks (2008)
Paramvir Bahl, Imrich Chlamtac, András Faragó
The task of supporting integrated multi-rate multimedia traffic in a bandwidth poor wireless environment poses a unique and challenging problem for network managers. In this paper we propose a novel...
The usage and service options of a pubic network generally differ from a private (enterprise or home) network and consequently, the two networks are often configured differently. The existence of...
The wide-scale deployment of IEEE 802.11 wireless networks has generated significant challenges for Information Technology (IT) departments in corporations. Users frequently complain about...
A Cone-Based Distributed Topology-Control Algorithm for Wireless Multi-Hop Networks (2008)
Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
Abstract — The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed...
Wireless subnet Implementing and (2008)
deploying public-area wireless networks present a number of practical challenges, including network security, privacy, authentication, mobility management, and provisioning of key services. FUTURE...
ABSTRACT Reconsidering Wireless Systems with Multiple Radios (2008)
Paramvir Bahl, Atul Adya, Jitendra Padhye, Alec Wolman
The tremendous popularity of wireless systems in recent years has led to the commoditization of RF transceivers (radios) whose prices have fallen dramatically. The lower cost allows us to consider...
Analyzing the Browse Patterns of Mobile Clients Abstract— (2008)
Atul Adya, Paramvir Bahl, Lili Qiu
We study the dynamics of a large popular commercial Web site designed specifically for users who access it via their cellphones and PDAs. Unlike most previous Web studies that have analyzed accesses...
Architecture And Techniques, Atul Adya, Paramvir Bahl
The wide-scale deployment of IEEE 802.11 wireless networks has generated significant challenges for Information Technology (IT) departments in corporations. Users frequently complain about...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract--- The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract--- The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
Towards highly reliable enterprise network services via inference of multi-level dependencies (2007)
Paramvir Bahl, Ranveer Ch, Albert Greenberg, Srikanth K, David A. Maltz, Ming Zhang
Localizing the sources of performance problems in large enterprise networks is extremely challenging. Dependencies are numerous, complex and inherently multi-level, spanning hardware and software...
Wireless Wakeups Revisited: Energy Management for VoIP over Wi-Fi Smartphones (2007)
Yuvraj Agarwal, Ranveer Ch, Alec Wolman, Paramvir Bahl, Kevin Chin, Rajesh Gupta
IP based telephony is rapidly gaining acceptance over traditional means of voice communication. Wireless LANs are also becoming ubiquitous due to their inherent ease of deployment and decreasing...
Wireless Wakeups Revisited: Energy Management for VoIP over Wi-Fi Smartphones (2007)
Yuvraj Agarwal, Ranveer Ch, Alec Wolman, Paramvir Bahl, Kevin Chin, Rajesh Gupta
IP based telephony is rapidly gaining acceptance over traditional means of voice communication. Wireless LANs are also becoming ubiquitous due to their inherent ease of deployment and decreasing...
Discovering dependencies for network management (2006)
Paramvir Bahl, Paul Barham, Richard Black, Ranveer Ch, Moises Goldszmidt, Rebecca Isaacs, ...
This paper presents the Leslie Graph, a simple yet powerful abstraction describing the complex dependencies between network, host and application components in modern networked systems. It discusses...
Enhancing the security of corporate Wi-Fi networks using DAIR (2006)
Paramvir Bahl, Ranveer Ch, Jitendra Padhye, Lenin Ravindranath, Manpreet Singh, Alec Wolman, ...
We present a framework for monitoring enterprise wireless networks using desktop infrastructure. The framework is called DAIR, which is short for Dense Array of Inexpensive Radios. We demonstrate...
Enhancing the security of corporate Wi-Fi networks using DAIR (2006)
Paramvir Bahl, Ranveer Ch, Jitendra Padhye, Lenin Ravindranath, Manpreet Singh, Alec Wolman, ...
We present a framework for monitoring enterprise wireless networks using desktop infrastructure. The framework is called DAIR, which is short for Dense Array of Inexpensive Radios. We demonstrate...
Discovering dependencies for network management (2006)
Paramvir Bahl, Paul Barham, Richard Black, Ranveer Ch, Moises Goldszmidt, Rebecca Isaacs, ...
This paper presents the Leslie Graph, a simple yet powerful abstraction describing the complex dependencies between network, host and application components in modern networked systems. It discusses...
Enhancing the security of corporate Wi-Fi networks using DAIR (2006)
Paramvir Bahl, Ranveer Ch, Jitendra Padhye, Lenin Ravindranath, Manpreet Singh, Alec Wolman, ...
We present a framework for monitoring enterprise wireless networks using desktop infrastructure. The framework is called DAIR, which is short for Dense Array of Inexpensive Radios. We demonstrate...
Discovering dependencies for network management (2006)
Paramvir Bahl, Paul Barham, Richard Black, Ranveer Ch, Moises Goldszmidt, Rebecca Isaacs, ...
This paper presents the Leslie Graph, a simple yet powerful abstraction describing the complex dependencies between network, host and application components in modern networked systems. It discusses...
Troubleshooting multihop wireless networks (2005)
Lili Qiu, Paramvir Bahl, Ananth Rao, Lidong Zhou
Effective network troubleshooting is critical for maintaining efficient and reliable network operation. Troubleshooting is especially challenging in multihop wireless networks because the behavior of...
A cone-based distributed topology-control algorithm for wireless multi-hop networks (2005)
Li (erran Li, Joseph Y. Halpern, Paramvir Bahl, Senior Member, Senior Member, Yi-min Wang, ...
Abstract—The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed...
Troubleshooting multihop wireless networks (2005)
Lili Qiu, Paramvir Bahl, Ananth Rao, Lidong Zhou
Effective network troubleshooting is critical for maintaining efficient and reliable network operation. Troubleshooting is especially challenging in multi-hop wireless networks because the behavior...
SSCH: slotted seeded channel hopping for capacity improvement (2004)
Capacity improvement is one of the principal challenges in wireless networking. We present a link-layer protocol called Slotted Seeded Channel Hopping, or SSCH, that increases the capacity of an IEEE...
A multi-radio unification protocol for IEEE 802.11 wireless networks (2004)
Atul Adya, Paramvir Bahl, Jitendra Padhye, Alec Wolman, Lidong Zhou
We present a link layer protocol called the Multi-radio Unification Protocol or MUP. On a single node, MUP coordinates the operation of multiple wireless network cards tuned to non-overlapping...
MultiNet: Connecting to Multiple IEEE 802.11 Networks Using a Single Wireless Card (2004)
Ranveer Chandra, Paramvir Bahl, Pradeep Bahl
There are a number of scenarios where it is desirable to have a wireless device connect to multiple networks simultaneously. Currently, this is possible only by using multiple wireless network cards...
MultiNet: Connecting to Multiple IEEE 802.11 Networks Using a Single Wireless Card (2004)
Ranveer Chandra, Paramvir Bahl
There are a number of scenarios where it is desirable to have a wireless device connect to multiple networks simultaneously. Currently, this is possible only by using multiple wireless network cards...
Paramvir Bahl, Ranveer Chandra
Capacity improvement is one of the principal challenges in wireless networking. We present a link-layer protocol called Slotted Seeded Channel Hopping, or SSCH, that increases the capacity of an IEEE...
Cell Breathing in Wireless LANs: Algorithms and Evaluation (2004)
Paramvir Bahl, Mohammad T. Hajiaghayi, Kamal Jain, Vahab Mirrokni, Lili Qiu, Amin Saberi
Abstract — Wireless LAN administrators often have to deal with the problem of sporadic client congestion in popular locations within the network. Existing approaches that relieve congestion by...
A multi-radio unification protocol for IEEE 802.11 wireless networks (2004)
Atul Adya, Paramvir Bahl, Jitendra Padhye, Alec Wolman, Lidong Zhou
We present a link layer protocol called the Multi-radio Unification Protocol or MUP. On a single node, MUP coordinates the operation of multiple wireless network cards tuned to non-overlapping...
A multi-radio unification protocol for IEEE 802.11 wireless networks (2004)
Atul Adya, Paramvir Bahl, Jitendra Padhye, Alec Wolman, Lidong Zhou
We present a link layer protocol called the Multi-radio Unification Protocol or MUP. On a single node, MUP coordinates the operation of multiple wireless network cards tuned to non-overlapping...
MultiNet: Connecting to Multiple IEEE 802.11 Networks Using a Single Wireless Card (2004)
Paramvir Bahl, Pradeep Bahl, Ranveer Chandra
There are a number of scenarios where it is desirable to have a wireless device connect to multiple networks simultaneously. Currently, this is possible only by using multiple wireless network cards...
Li, Erran L., Halpern, Joseph Y., Bahl, Paramvir, Wang, Yi-Min, Wattenhofer, Roger
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
PAWNs: Satisfying the Need for Ubiquitous Secure Connectivity and Location Services (2002)
Paramvir Bahl, Allen Miu, Wilf Russell, Geoffrey M. Voelker, Yi-min Wang
The dawning of the 21st century has seen unprecedented growth in the number of wireless users, applications, and network access technologies. This trend is enabling the vision of pervasive,...
Characterizing user behavior and network performance in a public wireless lan (2002)
Anand Balachandran, Geoffrey M. Voelker, Paramvir Bahl, P. Venkat Rangan
This paper presents and analyzes user behavior and network performance in a public-area wireless network using a workload captured at a well-attended ACM conference. The goals of our study are: (1)...
A Cone-Based Distributed Topology-Control Algorithm for Wireless Multi-Hop Networks (2002)
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
Secure Broadband Wireless Internet Access in Public Places (2001)
Victor Bahl, Anand Balachandran, Srinivasan Venkatachary, Paramvir Bahl
We are thankful to our colleagues who helped crystallize our initial ideas and designs. In particular
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
bahl~microsoft, corn ymwang~microsoft, corn rogerwa~microsoft, corn The topology of a wireless multi-hop network can be con-trolled by varying the transmission power at each node. In this paper, we...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract — The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
Priority and fair scheduling in a Wireless LAN (2001)
Anurag Dugar, Nitin Vaidya, Paramvir Bahl
1 In recent years, fair scheduling and quality of service (QoS) in wireless LANs have received signicant attention from the networking research community. This paper presents a distributed algorithm...
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
Analyzing Browse Patterns of Mobile Clients (2001)
Atul Adya, Paramvir Bahl, Lili Qiu
We study the dynamics of a large popular commercial Web site designed specifically for users who access it via their cellphones and PDAs. Unlike most previous Web studies that have analyzed accesses...
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-Min Wang, Roger Wattenhofer
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract — The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract--- The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
A rate-adaptive MAC protocol for multi-hop wireless networks (2001)
Gavin Holland, Nitin Vaidya, Paramvir Bahl
Wireless local area networks (W-LANs) have become increasingly popular due to the recent availability of aordable devices that are capable of communicating at high data rates. These high rates are...
Secure Wireless Internet Access in Public Places (2001)
Paramvir Bahl, Srinivasan Venkatachary
Abstract – We have built a network, called the CHOICE network, which globally authenticates users and then securely connects them to the Internet via a high-speed local area wireless network. Our...
Roger Wattenhofer, Li Li, Paramvir Bahl, Yi-min Wang
Abstract — The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local...
Li Li, Joseph Y. Halpern, Paramvir Bahl, Yi-min Wang, Roger Wattenhofer
The topology of a wireless multi-hop network can be controlled by varying the transmission power at each node. In this paper, we give a detailed analysis of a cone-based distributed topology control...
Distributed fair scheduling in a wireless LAN (2000)
Nitin Vaidya, Senior Member, Anurag Dugar, Seema Gupta, Paramvir Bahl, Senior Member
Abstract—Fairness is an important issue when accessing a shared wireless channel. With fair scheduling, it is possible to allocate bandwidth in proportion to weights of the packet flows sharing the...
RADAR: an in-building RF-based user location and tracking system (2000)
Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. In this paper we present RADAR, a...
RADAR: an in-building RF-based user location and tracking system (2000)
Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. In this paper we present RADAR, a...
Enhancements to the RADAR User Location and Tracking System (2000)
Paramvir Bahl And, Paramvir Bahl, Venkata N. Padmanabhan, Anand Balachandran
We address the problem of locating users inside buildings using a radio-frequency (RF) wireless LAN. A previous paper presented the basic design and a limited evaluation of a user-location system we...
A Rate-Adaptive MAC Protocol for Wireless Networks (2000)
Gavin Holland, Nitin Vaidya, Paramvir Bahl
Wireless local-area networks are becoming increasingly popular. This is due, in part, to the recent availability of devices capable of communicating at data rates approaching that of conventional...
RADAR: An In-Building RF-based User Location and Tracking System (2000)
Paramvir Bahl And, Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. In this paper we present RADAR, a...
RADAR: An In-Building RF-based User Location and Tracking System (2000)
Paramvir Bahl And, Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. In this paper we present RADAR, a...
A Software System for Locating Mobile Users: Design, Evaluation, and Lessons (2000)
Paramvir Bahl, Venkata N. Padmanabhan
We have built a software system, RADAR, to locate mobile users connected to an in-building radiofrequency (RF) wireless LAN. RADAR uses signal strength information extracted from the wireless network...
Distributed Fair Scheduling in a Wireless LAN (2000)
Nitin H. Vaidya, Paramvir Bahl, Seema Gupta
Fairness is an important issue when accessing a shared wireless channel. With fair scheduling, it is possible to allocate bandwidth in proportion to weights of the packet ows sharing the channel....
RADAR: an in-building RF-based user location and tracking system (2000)
Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. In this paper we present RADAR, a...
Fair Scheduling in Broadcast Environments (1999)
Nitin H. Vaidya, Paramvir Bahl
This report considers the problems of scheduling transmissions in broadcast environments, including, wireless environments. Issues that affect the design of fair scheduling algorithms, and several...
User Location and Tracking in an In-Building Radio Network (1999)
Redmond Wa, Paramvir Bahl Venkata, Paramvir Bahl, Venkata N. Padmanabhan, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. A key requirement for enabling such services is...
User Location and Tracking in an In-Building Radio Network (1999)
Redmond Wa, Paramvir Bahl, Paramvir Bahl, Venkata N. Padmanabhan, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. A key requirement for enabling such services is...
User location and tracking in an in-building radio network (1999)
Paramvir Bahl, Venkata N. Padmanabhan
The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. A key requirement for enabling such services is...
Resource assignment for integrated services in wireless ATM networks (1998)
Paramvir Bahl, Imrich Chlamtac, Rás Faragó
The task of supporting integrated multirate multimedia traffic in a bandwidth-poor wireless environment poses a significant challenge for network designers. In this paper we propose a novel bandwidth...
Mobility modeling, location tracking, and trajectory prediction in wireless ATM networks (1998)
Tong Liu, Paramvir Bahl, Senior Member, Imrich Chlamtac
Abstract — Wireless ATM networks require efficient mobility management to cope with frequent mobile handoff and rerouting of connections. Although much attention has been given in the literature to...
Influence of Available Bandwidth on the Statistical Characterization of Compressed Video (1997)
The design and analysis of robust networking protocols that offer useful performance guarantees requires accurate traffic source models. In this paper we study the problem of characterizing and...
Software-only Compression, Rendering, and Playback of Digital Video (1995)
Paramvir Bahl, Paul S. Gauthier, Robert A. Ulichney
Software-only digital video involves the compression, decompression, rendering, and display of digital video on general-purpose computers without specialized hardware. Today’s faster processors are...
Software-only Compression, Rendering, and. . . (1995)
Paramvir Bahl, Paul S. Gauthier, Robert A. Ulichney
This paper surveys the methods and architectures used in software-only digital video systems.
Recognition of handwritten script : a hidden Markov model based approach / (1988)
Thesis (M.S.)--State University of New York at Buffalo, 1988.
Recognition of handwritten script : a hidden Markov model based approach / (1988)
Thesis (M.S.)--State University of New York at Buffalo, 1988.