Jammer Localization in Multihop Wireless Networks Based on Gravitational Search

Algorithm 1

Node state determination algorithm.

(1) if  a node does not detect jamming attack  then

(2) This node is an unaffected node;

(3) else

(4) if  this node does not lose any neighbor and its

received SNRs from most of its neighbors’ do not

decrease more than a percent  then

(5) This node is an unaffected node;

(6) else

(7) if  this node loses more than percent of its

neighbors  then

(8) This node is a jammed node;

(9) else

(10) if  more than percent of its neighbors’ SNRs

decrease more than percent  then

(11) This node is a jammed node;

(12) else

(13) This node is a boundary node;

(14) end if

(15) end if

(16) end if

(17) end if