Abstract
different relay modes are defined in IEEE 802.16j WIMAX standard: transparent mode and non-transparent mode. IEEE 802.16j standard supports mobile station mobility; it defines three kinds of hand over mechanism: hard handover, macro diversity handover (MDHO) and fast BS switching (FBSS) In this paper we have simulated the hard hand over mechanism of IEEE 802.16j transparent mode networks using NCTUns Tool. We have used Adaptive modulation and coding scheme. The results show when the mobile station moves form base station 1 (BS1) to base station 2(BS2), it has to disconnect the original connection with BS1 before making a new connection with BS2. And also it shows that the throughput gradually decrease when the mobile station moves to NLOS. Key-Words: - IEEE 802.16j, transparent mode, hand over mechanism, NCTUns, throughput etc
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