Weighted CDF-based scheduling for an OFDMA relay downlink with partial feedback

Modern wireless systems are targeted to support various services to a variety of equipment. The services such as sending texts, images, and videos have different resource requirements, and so they should be granted different priorities. Moreover, a large number of resource blocks and users in a downlink system make full feedback expensive. In this paper, a partial feedback OFDMA system is considered where each user feeds back only the best M channel quality information (CQI) among the total number of resource blocks. The users are classified into several groups and users in each group have the same priority. A metric based on the weighted cumulative distribution function (CDF) of the received CQI of users is developed to exactly control the amount of resource allocated to different users. Then, both the distribution and average value of the system throughput are analyzed and verified by matching the analytical expression with the simulation results. The analysis is applied to two network models, one consists of only macro users and the other consists of both macro users and users communicating through relays.

[1]  Byeong Gi Lee,et al.  Wireless packet scheduling based on the cumulative distribution function of user transmission rates , 2005, IEEE Transactions on Communications.

[2]  Andrea J. Goldsmith,et al.  On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming , 2006, IEEE Journal on Selected Areas in Communications.

[3]  Robert W. Heath,et al.  An overview of limited feedback in wireless communication systems , 2008, IEEE Journal on Selected Areas in Communications.

[4]  Bhaskar D. Rao,et al.  User selection schemes for maximizing throughput of multiuser MIMO systems using Zero Forcing Beamforming , 2011, 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).

[5]  I. S. Gradshteyn,et al.  Table of Integrals, Series, and Products , 1976 .

[6]  Yichao Huang,et al.  On rate scaling laws with CDF-based distributed scheduling in multicell networks , 2012, 2012 International Symposium on Information Theory and its Applications.

[7]  H. N. Nagaraja,et al.  Order Statistics, Third Edition , 2005, Wiley Series in Probability and Statistics.

[8]  Bhaskar D. Rao,et al.  Sum Rate Analysis of a Reduced Feedback OFDMA Downlink System Employing Joint Scheduling and Diversity , 2011, IEEE Transactions on Signal Processing.

[9]  Kien T. Truong,et al.  Relay Architectures for 3GPP LTE-Advanced , 2009, EURASIP J. Wirel. Commun. Netw..

[10]  Hyundong Shin,et al.  Cooperative Communications with Outage-Optimal Opportunistic Relaying , 2007, IEEE Transactions on Wireless Communications.

[11]  Armin Wittneben,et al.  Spectral efficient protocols for half-duplex fading relay channels , 2007, IEEE Journal on Selected Areas in Communications.

[12]  Yindi Jing,et al.  Single and multiple relay selection schemes and their achievable diversity orders , 2009, IEEE Transactions on Wireless Communications.

[13]  D. E. Raeside.  Table of Integrals, Series, and Products, edited by I. S. Gradshteyn and I. M. Ryzhik , 1981 .

[14]  Bhaskar D. Rao,et al.  Sum Rate Analysis of a Reduced Feedback OFDMA Downlink System Employing Joint Scheduling and Diversity , 2011, IEEE Transactions on Signal Processing.

[15]  Michael L. Honig,et al.  Limited feedback schemes for downlink OFDMA based on sub-channel groups , 2008, IEEE Journal on Selected Areas in Communications.

[16]  Peiying Zhu,et al.  Multi-hop Relay System Evaluation Methodology (Channel Model and Performance Metric) , 2007 .

[17]  David Tse,et al.  Opportunistic beamforming using dumb antennas , 2002, IEEE Trans. Inf. Theory.

[18]  Aria Nosratinia,et al.  Opportunistic Downlink Transmission With Limited Feedback , 2007, IEEE Transactions on Information Theory.

[19]  Yichao Huang,et al.  An Analytical Framework for Heterogeneous Partial Feedback Design in Heterogeneous Multicell OFDMA Networks , 2013, IEEE Transactions on Signal Processing.

[20]  Wei Yu,et al.  Joint Optimization of Relay Strategies and Resource Allocations in Cooperative Cellular Networks , 2006 .

[21]  Raymond Knopp,et al.  Information capacity and power control in single-cell multiuser communications , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[22]  Aydin Sezgin,et al.  Throughput versus Fairness: Channel-Aware Scheduling in Multiple Antenna Downlink , 2009, EURASIP J. Wirel. Commun. Netw..