Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Hop-by-hop Cross-layer Congestion Control Scheme for Wireless Sensor
  Networks   Congestions in wireless sensor networks (WSNs) could potentially cause packet
loss, throughput impairment and energy waste. To address this issue, a
hop-by-hop cross-layer congestion control scheme (HCCC) built on
contention-based MAC protocol is proposed in this paper. According to MAC-layer
channel information including buffer occupancy ratio and congestion degree of
local node, HCCC dynamically adjusts channel access priority in MAC layer and
data transmission rate of the node to tackle the problem of congestion.
Simulations have been conducted to compare HCCC against closely-related
existing schemes. The results show that HCCC exhibits considerable superiority
in terms of packets loss ratio, throughput and energy efficiency.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int