Security Issues in Distributed Multihop WiMAX Networks
In this paper, the authors study the existing standards in multihop WiMAX networks and their security issues. For secured communications, it is necessary to have hop-by-hop authentication for any multihop wireless networks. WiMAX multihop networks provide default hop-by-hop authentication in a distributed security mode only. Apart from this, the multihop standards should consider the existing security issues in mobile WiMAX standard. It provides the solution for Medium Access Control (MAC) - control message issues. At the same time, network coding is used for Enhanced Multicast Broadcast Service (E-MBS) retransmission to improve the performance of MBS. However, the standard IEEE 802.16m/D4 is not able to consider the security threats for multihop support, network coding, and ranging.