Asymptotic Throughput in Wireless Multicast OFDM Systems

Abstract—With the proliferation of wireless multimedia applications, multicast/broadcast has been recognized as an efficient technique to transmit a large volume of data to multiple mobile stations at the same time. In most multicast systems, the transmitter (e.g., base station) adapts its data rate to the worst channel among all users in the multicast group, so as to guarantee service quality to each user. Predictably, the more users in a multicast group, the lower data rate the base station can transmit. On the other hand, grouping more users together leads to a more efficient utilization of spectrum bandwidth, as these users are served simultaneously. A natural question that arises is how to group users to maximize the throughput of multicast systems, given a fixed amount of bandwidth resource. In this paper, we attempt to answer this important question that has not been addressed before. Through theoretical analysis, we prove that (1) the average throughput increases with the ...

• Type: Conference
• Year: 2008
• Where: GLOBECOM
• Authors: Juan Liu, Wei Chen, Zhigang Cao, Ying Jun Zhang, Soung Chang Liew
• Keywords: Base Station, GLOBECOM 2008, Multicast Group, Multicast Systems, Telecommunications