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On the throughput rate of wireless multipoint multicasting

: Kaliszan, M.; Caire, G.; Stanczak, S.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Information Theory Society:
IEEE International Symposium on Information Theory, ISIT 2016. Proceedings : Universitat Pompeu Fabra, Barcelona, Spain, July 10-15, 2016
Piscataway, NJ: IEEE, 2016
ISBN: 978-1-5090-1806-2
ISBN: 978-1-5090-1807-9 (Print)
International Symposium on Information Theory (ISIT) <2016, Barcelona>
Fraunhofer HHI ()

3GPP/LTE provisions for a Multimedia Broadcast Multicast Service (MBMS), where a common data stream is sent to many users (a multicast group) simultaneously from multiple base stations, transmitting on the same frequency channel, i.e., forming a Single-Frequency Network (SFN). This setting has been extensively treated as a max-min fair beamforming problem, where the beamforming vector is optimized as a function of the instantaneous channel state information in order to maximize the instantaneous (per-slot) common rate over all users. Unfortunately, such common rate vanishes as the number of users grows for fixed number of base station antennas. In this paper we consider the ergodic regime, where coding across multiple slots affected by independent fading is allowed. We formulate the problem as an ergodic compound channel, subject to a per-slot and per-group of antennas power constraint, and we provide an efficient algorithm that approximates the compound capacity to any desired degree of accuracy.