%0 Journal Article
%T A Source-Based Multicast Scheme in IEEE 802.16 Mesh Mode
%A Mortaza Maleki
%A Saleh Yousefi
%A Ali Azarpeyvand
%J International Journal of Wireless and Microwave Technologies
%D 2012
%I MECS Publisher
%R 10.5815/ijwmt.2012.06.09
%X WiMAX based on IEEE 802.16 is known as one of effective technologies for transmission of multimedia to groups of receivers. There are two operational modes in WiMAX: point to multi point (PMP) for single hop transmission and a mesh node for multi-hop transmission. The current standard only defines unicast transmission under mesh mode thus the performance is deteriorated for multimedia applications with multicast nature. In this paper, we first propose a mechanism for source-based tree topology construction aiming at facilitating multicast transmission in WiMAX mesh network. In the proposed approach, the multicast tree is constructed considering available linkĄ¯s bandwidth and multicast group members. After constructing the multicast tree we propose a novel scheduling algorithm to improve the transmission throughout. In the proposed scheduling algorithm a parent node uses broadcasting when the number of its children belonging to a multicast group excesses a threshold. Extensive simulation results show that the proposed multicast mechanism improves multicast transmission efficiency and reduces scheduling time slots noticeably in comparison to the approach mandated by the IEEE 802.16 standard.
%K IEEE 802.16
%K WiMAX
%K Mesh mode
%K Multicast
%U http://www.mecs-press.org/ijwmt/ijwmt-v2-n6/v2n6-9.html