Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implementation and Experimental Evaluation of a Collision-Free MAC
  Protocol for WLANs   Collisions are a main cause of throughput degradation in Wireless LANs. The
current contention mechanism for these networks is based on a random backoff
strategy to avoid collisions with other transmitters. Even though it can reduce
the probability of collisions, the random backoff prevents users from achieving
Collision-Free schedules, where the channel would be used more efficiently.
Modifying the contention mechanism by waiting for a deterministic timer after
successful transmissions, users would be able to construct a Collision-Free
schedule among successful contenders. This work shows the experimental results
of a Collision-Free MAC (CF-MAC) protocol for WLANs using commercial hardware
and open firmware for wireless network cards which is able to support many
users. Testbed results show that the proposed CF-MAC protocol leads to a better
distribution of the available bandwidth among users, higher throughput and
lower losses than the unmodified WLANs clients using a legacy firmware.

13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph