Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Power Saving Techniques for Wireless LANs   Fast wireless access has rapidly become commonplace. Wireless access points
and Hotspot servers are sprouting everywhere. Battery lifetime continues to be
a critical issue in mobile computing. This paper first gives an overview of
WLAN energy saving strategies, followed by an illustration of a system-level
methodology for saving power in heterogeneous wireless environments.

33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio