Narasimha Challa

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We present a framework for a wireless health monitoring system using wireless networks such as ZigBee. Vital signals are collected and processed using a 3-tiered architecture. The first stage is the mobile device carried on the body that runs a number of wired and wireless probes. This device is also designed to perform some basic processing such as the(More)
This paper presents a novel code allocation scheme for multicasting in infrastructure-to-vehicle CDMA-based wireless networks. In a CDMA-based cellular network, to maximize the utilization of bandwidth and to minimize the overhead under varying channel conditions, the proposed scheme discusses how cellular and vehicular networks can collaborate in(More)
This paper presents a novel class-based fair code allocation (CFCA) protocol to support delay and rate guarantees for real-time flows and to provide fairness for non-real-time flows on the downlink of WCDMA-and VSF-OFCDM-based cellular networks. CFCA not only assigns bandwidth dynamically to different flows but also determines those appropriate OVSF codes(More)
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