  Source location privacy (SLP) protection is an emerging research topic in
wireless sensor networks (WSNs). Because the source location represents the
valuable information of the target being monitored and tracked, it is of great
practical significance to achieve a high degree of privacy of the source
location. Although many studies based on phantom nodes have alleviates the
protection of source location privacy to some extent. It is urgent to solve the
problems such as complicate the ac path between nodes, improve the centralized
distribution of Phantom nodes near the source nodes and reduce the network
communication overhead. In this paper, PSSPR routing is proposed as a visable
approach to address SLP issues. We use the coordinates of the center node V to
divide sector-domain, which act as important role in generating a new phantom
nodes. The phantom nodes perform specified routing policies to ensure that they
can choose various locations. In addition, the directed random route can ensure
that data packets avoid the visible range when they move to the sink node hop
by hop. Thus, the source location is protected. Theoretical analysis and
simulation experiments show that this protocol achieves higher security of
source node location with less communication overhead.
