Harshal Chhaya |
Tel: 972 415 6244 |
|
6849 Forest Hills Dr, Plano TX 75023 |
E-mail: harshal@chhaya.org |
Extensive experience in various types of wireless networks like WiMAX (IEEE 802.16), IEEE 802.11 (Wi-Fi), IEEE 802.15 (UWB) and Bluetooth. Broad knowledge and expertise in all aspects of such networks including protocol design and analysis, system architecture, implementation and end-to-end demonstration set-ups.
Demonstrated end-to-end networks to product teams, client companies and customers.
EXPERIENCE
12/2000-Present: Software Systems Engineer, DSP Solutions R&D Centre, Texas Instruments, Dallas
Lead software architect and developer for WiMAX (IEEE 802.16e) firmware. Architected and developed the upper MAC firmware . including the host interface and network manager modules . as well as the driver for the security co-processor. Implemented the WiMAX MAC ARQ protocol and demonstrated its effectiveness in maintaining video quality in an emulated wireless channel with errors. Led system integration and verification efforts and demonstrated streaming video and bi-directional data transfer over a WiMAX MAC-to-MAC link as well as over a link with test equipment.
Supervised development of a Linux host driver for the OMAP 2430 platform and its integration with the multi-media framework to demonstrate streaming video over the WiMAX MAC.
Leading contributor in the development of Universal MAC architecture . a software-defined Media Access Control / Link Layer controller targeting multiple wireless communication standards (IEEE 802.11, 802.15.3/UWB, 802.16e/WiMAX, etc.) with the benefits of small die-size, low power consumption, 100% programmable and scalable performance.
Responsible for end-to-end verification and testing and demonstrated streaming video over an IEEE 802.15.3 (UWB) network to potential customers and to internal business units.
One customer, a handset manufacturer, has adopted this architecture to add wireless broadband capabilities to their mobiles.
Trained various internal product groups (802.11, UWB) on this architecture resulting in wider TI-internal adoption.
Developed a multi-function Windows network device driver that has been used to debug and demonstrate various prototypes and products like DTV1000 (Hollywood), WiMAX and UWB.
Co-authored the Mesh Deterministic Access proposal and the CTS2Mesh proposal to the SEE-Mesh group (in IEEE 802.11s standards task group) to provide strong QoS in a wireless mesh network. This technology is a part of the draft protocol specification.
Co-authored proposals for improving performance in a 20Mhz/40Mhz mixed environment. Analyzed the various proposals to IEEE 802.11n (next generation WLANs) for impact on performance improvement and ease of implementation.
Enabled interoperability/debugging progress of the TI WLAN chipset by modifying the TI WLAN Windows driver to work with the Airopeek network sniffer application. The work was crucial for reference design development and delivery.
Implemented an adaptive fragmentation mechanism in the Windows NDIS driver that improved performance of TI WLAN products in high interference environments. Demonstrated operation and improved performance to product group.
Key contributor in implementing QoS (IEEE 802.11e) mechanisms on the TI WLAN platform. Implemented QoS polling in the Windows driver and demonstrated the importance of QoS through a VoIP call over WLAN in a heavy FTP traffic environment.
Two OEMs selected TI.s WLAN solution for their handsets as a result of the demonstration and discussion.
Evaluated the architecture of the first generation TI WLAN MAC chip and identified a list of changes to the chip to enable it to meet the QoS (802.11e) requirements. Also analyzed two different MAC architectures and advised on which one to use for future products. The recommendation was accepted by the upper management.
Helped increase confidence in TI's products by making several presentations on security issues in wireless LANs to external customers and partners.
6/96-12/2000: Software Design Engineer, Educational & Productivity Solutions, Texas Instruments, Dallas.
Key contributor to developing, implementing and demonstrating of a classroom network with TI calculator products (first with wired network followed by wireless network). Designed a wired network protocol for connecting TI calculators to a network controller and implemented the code for the controller. Demonstrated the network at various trade-shows and teacher conferences. Successful prototype deployment led to the product announcement of the TI-Navigator. system. (see http://education.ti.com/us/homenavigator).
Evaluated various wireless network protocols . HomeRF, Bluetooth, 802.11 and some custom protocols . for a wireless network of calculators. Architected and designed an IEEE 802.11-based wireless network of TI calculators for the classroom and demonstrated it at various conferences.
Met with various educators, technology coordinators and school administrators to discuss and demonstrate the value of TI.s classroom network product. As a result, a number of schools agreed to become pilot sites for an early prototype of the network.
TECHNICAL ACTIVITIES
Technical Editor for two WLAN books - "Wireless LANs - Implementing Interoperable Networks" (Macmillan Technical Publishing) and .Wireless LANs End to End. (Wiley and Sons)
Worked with TI Ventures to analyze technical claims from two start-ups . one in the field of wireless security and the other building a .wireless 1394. solution. TI Ventures and its VC partners used the analysis to make investment decisions in the companies.
Made technical contributions to IEEE 802.11 task groups on high-throughput MIMO (802.11n) and mesh networking (802.11s). Many of the proposals are part of the protocol specifications.
Presented a talk on 802.11 Security at TI Developer's Conference (2004). Attendee feedback ranked the talk in the top 5 sessions of the entire conference.
Provided technical expertise to various business groups within TI .
Provided technical guidance to the Hollywood (DTV) product team on demonstrating streaming video on a prototype for a DVB-H (mobile TV) chip.
Worked with the IEEE 1394 product team to help them understand the QoS enhancements to 802.11 and the challenges in defining a "wireless 1394" network
Provided WLAN expertise to TI Calculator division for the TI Navigator (wireless classroom network) product line. Co-inventor on two patent disclosures with E&PS engineers on improving WLAN performance in a network of battery-powered devices like calculators or cell-phones.
Member of various technical consulting groups like the Society of Industry Leaders (part of Vista Research) and the Gerson Lehrman Group Councils.
PATENTS
US Patent 6,947,736: Universal Broadband Home Network - allows using a single MAC architecture over a variety of wired and wireless media.
4 other Wireless LAN related patent applications are pending with the USPTO
AWARDS
OPNET Modeling Excellence Award, OPNET Inc (formerly MIL 3, Inc) for creating the first simulation model for the IEEE 802.11 WLAN MAC protocol
The Dean's Scholarship, Armour College of Engineering, Illinois Institute of Technology
EDUCATION
Master of Science (Electrical Engineering), Illinois Institute of Technology, Chicago
May 1996 GPA: 3.88
Thesis: Performance Evaluation of the IEEE 802.11 MAC Protocol for Wireless LANs.
Bachelor of Engineering (Electronics), Victoria Jubilee Technical Institute (now called Veermata Jijabai Technical Institute), University of Bombay, Bombay, India.
June 1993, With Honors.
Project: Detection and Analysis of Ventricular Late Potentials.