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LaSR: a supple multi-connectivity scheduler for multi-RAT OFDMA systems


Abstract: Network densification over space and spectrum is expected to be key to enabling the requirements of next generation mobile systems. The pitfall is that radio resource allocation becomes substantially more complex. In this paper we propose LaSR, a practical multi-connectivity scheduler for OFDMA-based multi-RAT systems. LaSR makes optimal discrete control actions by solving a sequence of simple optimization problems that do not require prior information of traffic patterns. In marked contrast to previous work, the flexibility of our approach allows us to construct scheduling policies that achieve a good balance between system cost and utility satisfaction, while jointly operate across heterogeneous RATs, accommodate real-system requirements, and guarantee system stability. Examples of system requirements considered in this paper include (but are not limited to): constraints on how scheduling data can be encoded onto signaling protocols (e.g. LTE's DCI), delays when turning on/off radio units, or on/off cycles when using unlicensed spectrum. We evaluate our scheduler via a thorough simulation campaign in a variety of scenarios with e.g. mobile users, RATs using unlicensed spectrum (using a duty cycle access mechanism), imperfect queue state information, and constrained signaling protocol.

 Autoría: Diez L., Garcia-Saavedra A., Valls V., Li X., Costa-Perez X., Aguero R.,

 Fuente: IEEE Transactions on Mobile Computing, 2020, 19(3), 624-639

Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 01/03/2020

Nº de páginas: 16

Tipo de publicación: Artículo de Revista

DOI: 10.1109/TMC.2018.2876847

ISSN: 1536-1233,1558-0660

Proyecto español: TEC2015-71329-C2-1-R

Url de la publicación: https://doi.org/10.1109/TMC.2018.2876847

Autores/as

ANDRES GARCIA SAAVEDRA
VALLS BAEZA, VÍCTOR
LI, XI
COSTA PÉREZ, XAVIER