An analytical study of infrastructure-dependent wireless multicast over IEEE 802.11n WLAN

Infrastructure-Dependent Wireless Multicast (IDWM) is a technique where transmit sources are placed at the edge of the coverage area, to combat the attenuation that the multicast signal from the source in the middle of the coverage area experiences. In this paper, the concept of IDWM is studied using a semi-analytical approach considering an IEEE 802.11n wireless local area network (WLAN) by placing the antennas at opposite ends of a sector of the coverage area simulated. The study shows how the Packet Error Rate (PER) of those nodes, which are located at a larger distance from the original source experiences a decrease. Besides this advantage, the IDWM is also beneficial because it does not require any changes at the receivers and hence can be easily implemented in already existing WLANS.