International Journal of Emerging Technology in Computer Science and Electronics ( IJETCSE)
In this paper, the authors have simulated the hard hand over mechanism of IEEE 802.16j transparent mode networks using NCTUns tool. They have used adaptive modulation and coding scheme. The results show when the mobile station moves form base station to base station, it has to disconnect the original connection with BS before making a new connection with BS. And also it shows that the throughput gradually decrease when the mobile station moves to NLOS. They identify the authentication and key agreement, procedure for each of the possible cases.