The purpose of this PhD is to provide Quality in multihop wireless networks through the use of So'tware Defined Networks Management. M Abuteir will have in a first step to produce a bibliographic study to evaluate the existing work produced in that field of research. Then he will address one of these issues and propose some innovative solutions. The contribution will be simulated and compared with other existing solutions to prove their benefits. The results have to be submitted to international revues or conferences in the fields of expertise to validate the candidate research work.