Traffic improvements in wireless communication networks using antenna arrays

Citation
J. Razavilar et al., Traffic improvements in wireless communication networks using antenna arrays, IEEE J SEL, 18(3), 2000, pp. 458-471
Citations number
21
Categorie Soggetti
Information Tecnology & Communication Systems
Journal title
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
ISSN journal
07338716 → ACNP
Volume
18
Issue
3
Year of publication
2000
Pages
458 - 471
Database
ISI
SICI code
0733-8716(200003)18:3<458:TIIWCN>2.0.ZU;2-W
Abstract
A wireless network with beamforming capabilities at the receiver is conside red that allows two or more transmitters to share the same channel to commu nicate with the base station. A novel approach is introduced, which combine s the effects of the digital signal processing (adaptive beamforming) at th e physical layer with the traffic policies at the network layer on the over all queuing model of a cell. The effect of signal processing on the queuing model of the cell is represented by a parameter in the final cell model. E ach cell is modeled by a multiuser/multiserver service facility, where each server is a beamformed channel formed by the cell's base station. From thi s effective cell model, we find the closed form solutions for blocking prob abilities of the calls and total carried traffic in a wireless network with adaptive arrays. Our analytical as well as numerical results show that ada ptive beamforming at the receiver reduces the blocking probability of the c alls and increases the total carried traffic in the system.