Reihe Informatik Tr - 2005 - 014
نویسنده
چکیده
منابع مشابه
REIHE INFORMATIK TR-2005-005 Huginn: A 3D Visualizer for Wireless ns-2 Traces
Discrete-event network simulation is a major tool for the research and development of mobile ad-hoc networks (MANETs). These simulations are used for debugging, teaching, understanding, and performance-evaluating MANET protocols. For the first three tasks, visualization of the processes occurring in the simulated network is crucial for verification and credibility of the generated results. Work...
متن کاملREIHE INFORMATIK TR-2005-006 TECA: A Topology and Energy Control Algorithm for Sensor Networks
A main challenge in the field of sensor networks is energy efficiency to prolong the sensor’s operational lifetime. Due to low-cost hardware, nodes’ placement or hardware design, recharging might be impossible. Since most energy is spent for radio communication, many approaches exist that put sensor nodes into sleep mode with the communication radio turned off. In this paper, we propose a new T...
متن کاملREIHE INFORMATIK TR-2005-013 An Energy-Efficient Forwarding Scheme for Wireless Sensor Networks
Energy-efficient forwarding becomes important if resources and battery lifetime are limited such as in Wireless Sensor Networks. Although widely used, simple hop-based forwarding along a path from one node towards a sink can be very inefficient in terms of delivery rate as well as energy efficiency, especially in lossy environments. We will show that just minimizing the expected number of trans...
متن کاملREIHE INFORMATIK TR-04-008 Automatic Generation of Video Summaries for Historical Films
A video summary is a sequence of video clips extracted from a longer video. Much shorter than the original, the summary preserves its essential messages. In the project ECHO (European Chronicles On-line) a system was developed to store and manage large collections of historical films for the preservation of cultural heritage. At the University of Mannheim we have developed the video summarizati...
متن کاملREIHE INFORMATIK TR-2006-005 The Impact of Forward Error Correction on Wireless Sensor Network Performance
In networks there are basically two methods to tackle the problem of erroneous packets: Automatic Repeat Requests (ARQ) and Forward Error Correction (FEC). While ARQ means packet retransmissions, FEC uses additional bits to detect and correct distorted data. However, extensive field test of our sensor nodes have shown that FEC can take effect only as long as both sender and receiver are bit-wis...
متن کامل