104 search results - page 11 / 21 » Sensing-based opportunistic channel access |
JSAC
2008
13 years 9 months ago
2008
We propose the cross-layer based opportunistic multi-channel medium access control (MAC) protocols, which integrate the spectrum sensing at physical (PHY) layer with the packet sch...
LCN
2006
IEEE
14 years 3 months ago
2006
IEEE
This paper investigates the problem of how to improve TCP performance in multi-rate Ad-hoc networks with congested links. To improve network performance, different rate adaptation...
VTC
2008
IEEE
14 years 4 months ago
2008
IEEE
—In this paper a cooperative retransmission scheme for 802.11 WLANs is proposed. The mechanism allows stations with good channel to the access point to retransmit packets on beha...
TWC
2010
13 years 4 months ago
2010
This work evaluates opportunistic relaying in the presence of thermal noise as well as interference, when channel sensing is conducted reactively, in slow fading environments. The ...
ICC
2008
IEEE
14 years 4 months ago
2008
IEEE
— Directional antennas in multihop wireless networks offer a potential increase in the spatial reuse of the wireless channel. However, existing directional MAC protocols are not ...