K. Paul

Bio: K. Paul is an academic researcher from Intel. The author has contributed to research in topics: WiMAX & Broadband networks. The author has an hindex of 1, co-authored 1 publications receiving 26 citations.

WiFiRe: rural area broadband access using the WiFi PHY and a multisector TDD MAC

Abstract: The needs of Indian rural telecom, and the economics of currently available broadband access technologies, motivate a new system for rural broadband access, which we call WiFiRe (WiFi rural extension). The system leverages the widely available, and highly cost-reduced, WiFi chipsets. We, however, retain only the PHY from these chipsets and propose a single-channel, multisector, TDD MAC using directional antennas. The proposed WiFiRe MAC is similar to the WiMAX MAC in several respects. In this article we motivate our approach, describe the system architecture and the MAC, analyse the spatial reuse, and then, using a simple scheduler, provide an assessment of the voice and data capacity of a WiFiRe system

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

Abstract: This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

Beyond pilots: keeping rural wireless networks alive

Abstract: Very few computer systems that have been deployed in rural developing regions manage to stay operationally sustainable over the long term; most systems do not go beyond the pilot phase. The reasons for this failure vary: components fail often due to poor power quality, fault diagnosis is hard to achieve in the absence of local expertise and reliable connectivity for remote experts, and fault prediction is non-existent. Any solution addressing these issues must be extremely low-cost for rural viability. We take a broad systemic view of the problem, document the operational challenges in detail, and present low-cost and sustainable solutions for several aspects of the system including monitoring, power, backchannels, recovery mechanisms, and software. Our work in the last three years has led to the deployment and scaling of two rural wireless networks: (1) the Aravind telemedicine network in southern India supports video-conferencing for 3000 rural patients per month, and is targeting 500,000 patient examinations per year, and (2) the AirJaldi network in nothern India provides Internet access and VoIP services to 10,000 rural users.

Cognitive WiFi radio network

Abstract: The invention relates to a cognitive radio (CR) WiFi network which includes a plurality of radio environment aware WiFi terminals, which collect local WiFi interference information and send this information to a CR network management system (NMS). The CR NMS includes a database for storing historical records of the interference information obtained from the terminals, and cognitive engines for analyzing the stored historical interference records and determining terminal-specific transmission and reception parameters. In one embodiment the network implements a deterministic NMS-directed networks-wide TDD/TDM scheduling of WiFi communications for optimal channel re-use and interference avoidance, and a novel terminal synchronization mechanism.

An Efficient Framework and Networking Protocol for Linear Wireless Sensor Networks

Abstract: This paper presents and evaluates a protocol for Linear Structure wireless sensor networks which uses a hierarchical addressing scheme designed for this type of networking environment. This kind of linear structure exists in many sensor applications such as monitoring of international borders, roads, rivers, as well as oil, gas, and water pipeline infrastructures. The networking framework and associated protocols are optimized to take advantage of the linear nature of the network to decrease installation, maintenance cost, and energy requirements, in addition to increasing reliability and improving communication efficiency. In addition, this paper identifies some special issues and characteristics that are specifically related to this kinds of networks. Simulation experiments using the proposed model, addressing scheme and routing protocol were conducted to test and evaluate the network performance under various network conditions.

JaldiMAC: taking the distance further

Abstract: WiFi has been promoted as an affordable technology that can provide broadband Internet connectivity to poor and sparsely populated regions A growing number of deployments, some of substantial scale, are making use of WiFi to extend connectivity into rural areas However, the vast majority of the 35 billion people living in rural villages [1] are still unservedTo reach these people, new technology must be developed to make small rural wireless Internet service providers (WISPs) profitable We have identified radio towers as the largest expense for WISPs; to reduce or eliminate this barrier to entry, we propose a novel point-to-multipoint deployment topology that takes advantage of "natural towers" such as hills and mountains to provide connectivity even over great distances We make this design practical with a new TDMA MAC protocol called JaldiMAC that (i) enables and is optimized for point-to-multipoint deployments, (ii) adapts to the asymmetry of Internet traffic, and (iii) provides loose quality of service guarantees for latency sensitive traffic without compromising fairness To our knowledge, JaldiMAC is the first integrated solution that combines all of these elementsOur evaluation of JaldiMAC suggests that it fulfills its design goals Our scheduler is able to provide a 71% decrease in jitter and superior latency characteristics in exchange for a 5% increase in average RX/TX switches, as compared to a stride scheduler Overall, we find that JaldiMAC performs surprisingly well at this early stage