With the advancement in technology, there is a limited spectrum allocation and we need to communicate in each field. So we have cognitive radio network with us to make us able to communicate by using the frequency spectrum of licensed nodes. Cognitive radio network has two nodes categories namely Primary nodes and Secondary nodes. Primary nodes do have their own frequency allocation and we can make secondary nodes to communicate between each other by using the frequency of Primary nodes. Not only this we have several concepts to make communication between secondary nodes while in this paper we are using spectrum aware protocol in cognitive radio network using the concepts of TDMA.