1343 search results - page 71 / 269 » Coverage by directional sensors |
TMC
2008
13 years 9 months ago
2008
In this paper, we propose a new Medium Access Control (MAC) protocol for full exploitation of directional antennas in wireless networks. The protocol introduces a circular directio...
DCOSS
2008
Springer
13 years 11 months ago
2008
Springer
Abstract. Wireless sensor networks are increasingly being used in environmental monitoring applications. Collecting raw data from these networks can lead to excessive energy consum...
MOBIHOC
2003
ACM
14 years 8 months ago
2003
ACM
Directional antennas in ad hoc networks offer many benefits compared with classical omnidirectional antennas. The most important include significant increase of spatial reuse, cov...
SIPS
2008
IEEE
14 years 3 months ago
2008
IEEE
This paper describes the sub-Nyquist rate digital-to-analog conversion technique for a direct waveform synthesis (DWS) transmitter. IEEE 802.22 TV band Cognitive Radio (CR) transm...
MOBIHOC
2003
ACM
14 years 8 months ago
2003
ACM
Spatial query execution is an essential functionality of a sensor network, where a query gathers sensor data within a specific geographic region. Redundancy within a sensor networ...