To protect source location privacy

a novel angle-based directed random walk（ ABDRW） routing protocol is proposed

which use the arctangent value of the slope of the adjacent nodes to determine the scope of the next phantom nodes on phantom path

this approach can generate more different phantom sources that are far away from the real source

and thus enhances the source location privacy protection. Comparing with several existing typical methods

such as hop-based directed random walk（ HBDRW） and the completely random walk phantom routing（ CRWPR）

ABDRW protocol can reach higher source location privacy protection performance on safety period and energy consumption

through flexible selection and more uniform distribution of phantom source

so it can protect the source location privacy better.