Title :
On optimized joint uplink/downlink resource allocation in OFDMA networks
Author :
El-Hajj, Ahmad M. ; Dawy, Zaher
Author_Institution :
Dept. of Electr. & Comput. Eng., American Univ. of Beirut, Beirut, Lebanon
fDate :
June 28 2011-July 1 2011
Abstract :
The emergence of new wireless technologies paved the way to the introduction of a new class of symmetric services with joint uplink/downlink quality of service requirements. In this paper, we formulate joint uplink/downlink resource allocation in OFDMA networks as an optimization problem with total sum-rate maximization as an objective function. A regularization term is added to the problem formulation to account for the coupling between the uplink and the downlink directions. This additional term controls the resource allocation via the minimization of the per-user difference between the uplink and downlink rates. We solve the formulated problem using dual optimization techniques. Performance results demonstrate the effectiveness of the proposed joint uplink/downlink allocation scheme compared to traditional single-link schemes.
Keywords :
frequency division multiple access; minimisation; quality of service; radio links; OFDMA networks; optimization problem; optimized joint uplink-downlink resource allocation; per-user difference minimization; quality of services; sum-rate maximization; wireless technology; Analytical models; Couplings; Downlink; Equations; Joints; Optimization; Resource management;
Conference_Titel :
Computers and Communications (ISCC), 2011 IEEE Symposium on
Conference_Location :
Kerkyra
Print_ISBN :
978-1-4577-0680-6
Electronic_ISBN :
1530-1346
DOI :
10.1109/ISCC.2011.5983848