Hariharan Balakrishnan

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Researchers have been studying wireless networks for a number of years and have developed fairly sophisticated protocols using clustering, multi-hop routing, and direct communication approaches. We are developing communication protocols for sensor networks, which differ from traditional wireless networks in both the function that these networks serve and(More)
1. Summary Conventional network middleboxes process packets either per-flow (e.g., forwarding tables, MPLS) or per-packet (e.g., DPI, IDS, firewalls). Each approach offers protocol designers different levels of control. Flow-processing simplifies " macro "-level decisions by abstracting away the packet-by-packet details, while packet-processing exposes(More)
— The Wireless sensor network (WSN) consisting of a large number of sensors are effective for gathering data in a variety of environments. Sensors are usually randomly deployed where battery replacement or recharge is difficult or even impossible to be performed. In this paper, we first completely analyze the basic distributed clustering routing protocol(More)
High-bandwidth multisource multicast among widely distributed nodes is critical for a wide range of important applications including audio and video conferencing, multi-party games and content distribution. Multicast de-couples the size of the receiver set from the amount of state kept at any single node and potentially avoids redundant communication in the(More)
Wireless sensor network consists of sensor nodes which are powered by battery; to communicate with each other for environment monitoring. Energy efficiency is the main issue in wireless sensor networks. Therefore, to maximize network lifetime and achieve maximum reliability and scalability, routing techniques have been developed. LEACH is the conventional(More)
We present the design and experimental evaluation of an Optical Multicast System for Data Center Networks, a hardware-software system architecture that uniquely integrates passive optical splitters in a hybrid network architecture for faster and simpler delivery of multicast traffic flows. An application-driven control plane manages the integrated optical(More)
WSN are increasingly used in different types of data-intensive applications scenarios such as micro-climate monitoring, precision agriculture, and audio/video surveillance. The sensor nodes are tiny and limited in power. Sensor types vary according to the application of WSN. Whatever be the application the key challenge is to transmit all the data generated(More)
A Wireless Sensor Network (WSN) consists of thousands of sensor nodes with limited energy, memory and computational capability. Routing protocol with energy efficiency has been a challenging issue in the design of Wireless Sensor Networks. Various routing protocols are designed for transmission in WSNs. In this paper a mechanism has been proposed of(More)
In this poster, we present BlockRate, a wireless bitrate adaptation algorithm designed for blocks, or large contiguous units of transmitted data, as opposed to small packets. In contrast to state-of-the-art algorithms that can either have the amortization benefits of blocks or high responsiveness to underlying channel conditions of packets, BlockRate has(More)