Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimizing Channel Access for Event-Driven Wireless Sensor Networks:
  Analysis and Enhancements   We study the problem of medium access control in domain of event-driven
wireless sensor networks (WSNs). In this kind of WSN, sensor nodes send data to
sink node only when an event occurs in the monitoring area. The nodes in this
kind of WSNs encounter correlated traffic as a subset of nodes start sending
data by sensing a common event simultaneously. We wish to rethink of medium
access control (MAC) for this type of traffic characteristics. For WSNs, many
existing MAC protocols utilize the basic CSMA/CA strategy such as IEEE 802.11
Binary Exponential Backoff (BEB) algorithm to handle the collisions among
packets when more than one node need to access the channel. We show that this
BEB algorithm does not work well without incurring access delay or performance
degradation due to increased number of collisions and retransmissions when
nodes encounter correlated traffic. Based on above observations in mind, We
present a Adaptive Random Backoff (ARB) algorithm that is capable of mitigating
the impact of correlated traffic and capable of minimizing the chance of
collisions. ARB is based on minor modifications of BEB. We show using numerical
analysis that our proposals improve the channel access in terms of latency,
throughput, and frame dropping probability as compared with IEEE 802.11 DCF.
Simulations using NS-2 network simulator are conducted to validate the
analytical results.

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The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci