Communication Protocols for Heterogeneous, Spread-Spectrum Packet Radio Networks

Download or read book Communication Protocols for Heterogeneous, Spread-Spectrum Packet Radio Networks written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research project has focused on the development of protocols and reception techniques for distributed packet radio networks that exploit directional antennas to provide high-throughput, reliable data and voice communications, and that conserve sensor battery energy when relaying sensor data through the network. The research focused on the development of channel-access protocols, adaptive link protocols, and adaptive routing protocols for packet radio networks that employ spread-spectrum modulation. One goal of the research has been to ensure that critical data is forwarded from microsensors to data-fusion centers or mobile-radio end systems while efficiently utilizing the limited energy in the sensors' nonrechargeable batteries. A primary research emphasis has been the design of protocols that minimize the total energy consumption for store-and-forward routing through the sub-network of microsensors, and that account for energy depletion in individual sensors. An important component of this emphasis is the design of protocols that utilize more capable radio systems in the tactical network whenever possible to minimize the amount of data relaying required of the sensors. A second, related emphasis has been efficient exploitation of the presence within the tactical network of mobile radio systems that utilize directional antennas. Primary topics of the research include the design of the packet-acquisition techniques, channel-access protocols, and resource-management techniques that allow a node with multiple fixed-beam directional antennas to exploit their capabilities without introducing a significant increase in the complexity of the network's protocols. A list of related publications is included.