Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dead Zone Penetration Protocol for Cognitive Radio Networks   Current routing protocols for cognitive radio networks are severely affected
by the frequent activity of primary users. Nodes that are in the interference
range of an appearing primary user are not allowed to transmit, and therefore
existing routes which utilize such nodes are obliged to undergo a route
maintenance phase. This naturally provides other routes to the destination that
may incur extra delay or increase packet queuing overhead. In this work, a
novel route maintenance protocol is proposed that allows existing routes to
endure the event of primary user presence by forming cooperative links between
neighboring nodes and nulling out transmission at the primary receiver using
cooperative beamforming. Our proposed protocol can be used in conjunction with
any of the existing routing protocols, thus achieving modularity. Extensive
simulations are done which prove that our proposed protocol outperforms
existing route maintenance techniques in terms of end-to-end delay and loss
ratio, with minimal incurred overhead.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys