Wireless sensor networks research in medical assistant application

In view of the existing situation that patients´ physiological information is not timely and securely acquired and medical workers is easy infected in some particular large scale medical assistance application, a feasible solution based on wireless sensor networks is proposed. In the solution, a secure network topology based on hexagonal mesh is constructed according to node locations for acquiring patients´ information and an secure and energy-efficient routing algorithm is designed according to characters of hops for transmission of patients´ information. Data security is realized by one-way hash key chain and symmetric key authentication. Analysis shows that the solution has better performance on saving energy, traffic load and security.