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Efficient Batch and Adaptive Approximation Algorithms for Joint Multicast Beamforming and Admission Control
dc.creator | Matskani, E. | en |
dc.creator | Sidiropoulos, N. D. | en |
dc.creator | Luo, Z. Q. | en |
dc.creator | Tassiulas, L. | en |
dc.date.accessioned | 2015-11-23T10:39:04Z | |
dc.date.available | 2015-11-23T10:39:04Z | |
dc.date.issued | 2009 | |
dc.identifier | 10.1109/tsp.2009.2026621 | |
dc.identifier.issn | 1053-587X | |
dc.identifier.uri | http://hdl.handle.net/11615/30783 | |
dc.description.abstract | Wireless multicasting is becoming increasingly important for efficient distribution of streaming media and location-aware services to mobile and hand-held devices, network management, and software updates over cellular (UMTS-LTE) and indoor/outdoor wireless networks (e. g., 802.11/16). Multicast beamforming was recently proposed as a means of exploiting the broadcast nature of the wireless medium to boost spectral efficiency and meet Quality of Service (QoS) requirements. Infeasibility is a key issue in this context, due to power or mutual interference limitations. We therefore consider the joint multicast beamforming and admission control problem for one or more co-channel multicast groups, with the objective of maximizing the number of subscribers served and minimizing the power required to serve them. The problem is NP-hard even for an isolated multicast group and no admission control; but drawing upon our earlier work for the multiuser SDMA downlink, we develop an efficient approximation algorithm that yields good solutions at affordable worst-case complexity. For the special case of an isolated multicast, Lozano proposed a particularly simple adaptive algorithm for implementation in UMTS-LTE. We identify strengths and drawbacks of Lozano's algorithm, and propose two simple but worthwhile improvements. All algorithms are carefully tested on publicly available indoor/outdoor measured channel data. | en |
dc.source.uri | <Go to ISI>://WOS:000271958600023 | |
dc.subject | Admission control | en |
dc.subject | beamforming | en |
dc.subject | convex approximation | en |
dc.subject | E-MBMS | en |
dc.subject | multicasting | en |
dc.subject | NP-hard | en |
dc.subject | UMTS-LTE | en |
dc.subject | Engineering, Electrical & Electronic | en |
dc.title | Efficient Batch and Adaptive Approximation Algorithms for Joint Multicast Beamforming and Admission Control | en |
dc.type | journalArticle | en |
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