A fast LMMSE channel estimation method for OFDM systems
EURASIP Journal on Wireless Communications and Networking - Special issue on OFDMA architectures, protocols, and applications
Delay-optimal power and precoder adaptation for multi-stream MIMO systems
IEEE Transactions on Wireless Communications
Design and analysis of delay-sensitive cross-layer OFDMA systems with outdated CSIT
IEEE Transactions on Wireless Communications
Cross-layer design for single-cell OFDMA systems with heterogeneous QoS and partial CSIT
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Optimal asymmetric resource allocation with limited feedback for OFDM based relay systems
IEEE Transactions on Wireless Communications
Delay-optimal resource allocation for OFDMA systems via stochastic approximation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Dynamic resource allocation with limited feedback for OFDM based cooperative networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Adaptive resource allocation for multi-destination relay systems based on OFDM modulation
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Delay-optimal power and subcarrier allocation for OFDMA systems via stochastic approximation
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Distributive stochastic learning for delay-optimal OFDMA power and subband allocation
IEEE Transactions on Signal Processing
QoS analysis of a scheduling policy for heterogeneous users employing AMC jointly with ARQ
IEEE Transactions on Communications
Cross-Layer Design Using Superposition Coding Scheme for Multiuser OFDM Systems
Wireless Personal Communications: An International Journal
| Hi-index | 0.01 |
This paper proposes a cross-layer scheduling scheme for OFDMA wireless systems with heterogeneous delay requirements. We shall focus on the cross-layer design which takes into account both queueing theory and information theory in modeling the system dynamics. We propose a delay-sensitive cross-layer design, which determines the optimal subcarrier allocation and power allocation policies to maximize the total system throughput, subject to the individual user's delay constraint and total base station transmit power constraint. The delay-sensitive power allocation was found to be multilevel water-filling in which urgent users have higher water-filling levels. The delay-sensitive subcarrier allocation strategy has linear complexity with respect to number of users and number of subcarriers. Simulation results show that substantial throughput gain is obtained while satisfying the delay constraints when the delay-sensitive jointly optimal power and subcarrier allocation policy is adopted.