IDIT   25587
INSTITUTO DE ESTUDIOS AVANZADOS EN INGENIERIA Y TECNOLOGIA
Unidad Ejecutora - UE
artículos
Título:
Performance of Quantized Random Beamforming in Delay-Tolerant Machine-Type Communication
Autor/es:
J. HAMALAINEN; A. DOWHUSZKO; R. WICHMAN; G. CORRAL BRIONES
Revista:
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Editorial:
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Referencias:
Lugar: New York; Año: 2016
ISSN:
1536-1276
Resumen:
Machine-to-Machine (M2M) communication represents a new paradigm for mobile cellular net-works, where a massive number of low-cost devices is expected to request frequent transfers of small amounts of data with no human intervention. One option to improve the performance of delay-tolerantM2M services is obtained by combining Random Beamforming (RBF) with opportunistic schedul-ing. RBF induces larger channel fluctuations in semi-staticwireless environments, while opportunistic scheduling selects M2M devices when the effective instantaneous channel experiences constructive fading. A novel approach to enable narrowband M2M connectivity is introduced, and a simplified methodology to study the effect of feedback resolution on the system spectral efficiency is presented. Performance is evaluated in terms of the mean data rate, using closed form expressions that have been derived for this purpose. Results reveal that the performance loss due to simplified implementation requirements is almost negligible. The concepts analyzed in this paper provide useful insights, and show that RBF combined with opportunistic scheduling is an excellent option for low-power wide-area M2M services with low-cost hardware and limited signaling overhead.