This causes WLAN throughput performance to suffer drastically due to the MAC design which is based on contention-based random access and suffers from inevitable collisions and back-offs.
A neighbor discovery algorithm based on contention-based and contention-free approaches have been developed in [8], where only the sink node uses directional antenna, whereas the other nodes use omnidirectional one, resulting in asymmetry-in-gain problem [9, 10].
A possible reason behind this is, due to the usage of the SU statistics based on past contention failures, a given SU overestimates the level of competition for the highly available channels and try to aggressively use the channels with high PU activity.
Sells also lost an appeal based on the contention that he had inadequate legal help during his trial.
They moved to void Morales's contract last week, based on their contention that Morales misrepresented his age.
It was based on the contention of a "prominent" German politician, Gunther Krichbaum, that the UK "cannot survive" outside the EU.
Judge Raggi replied that the prosecution's case was based on its contention that Mr. Schwarz took part in the assault on Mr. Louima.
Many doubts about the shield are based on the contention that decoys could always confuse an interceptor to let a warhead slip through.
The outcry over the disproportionate influence New Hampshire and Iowa wield on the presidential nominating system is largely based on the contention that two small states are demographically unrepresentative of the nation.
