Downlink Scheduling for User Equipment Served by Multiple Mobile Terminals

We present a downlink opportunistic scheduling algorithm when there are user equipments (UEs) served by multiple mobile terminals (MTs) in a time- slotted cellular system. We study two scenarios, namely Scenario (i) when the scheduler knows the presence of such UEs; and Scenario (ii) when the scheduler has no knowledge of the presence of such UEs. We establish the optimality and present the main properties of our scheduling scheme. Simulations under High-Speed Down-link Packet Access (HSDPA) model are implemented which show that our algorithm works well and provides an approximately 20% performance improvement for the UEs served by multiple MTs as compared to previous opportunistic scheduling schemes. Furthermore, our algorithm is able to provide better overall performance even in the worst case. The objective behind this research work is to establish the performance of cellular systems that provides differentiated quality of service (QoS).

[1]  Victor C. M. Leung,et al.  Throughput Constrained Opportunistic Scheduling in Cellular Data Networks , 2009, IEEE Transactions on Vehicular Technology.

[2]  Vikram Krishnamurthy,et al.  Opportunistic scheduling for streaming multimedia users in high-speed downlink packet access (HSDPA) , 2006, IEEE Transactions on Multimedia.

[3]  Ainslie,et al.  CORRELATION MODEL FOR SHADOW FADING IN MOBILE RADIO SYSTEMS , 2004 .

[4]  Ness B. Shroff,et al.  A framework for opportunistic scheduling in wireless networks , 2003, Comput. Networks.

[5]  Ness B. Shroff,et al.  Transmission scheduling for efficient wireless resource utilization with minimum-performance guarantees , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[6]  Dong-Ho Cho,et al.  Channel adaptive CQI reporting schemes for HSDPA systems , 2006, IEEE Communications Letters.

[7]  Frank Frederiksen,et al.  Performance aspects of WCDMA systems with high speed downlink packet access (HSDPA) , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[8]  Ness B. Shroff,et al.  Opportunistic transmission scheduling with resource-sharing constraints in wireless networks , 2001, IEEE J. Sel. Areas Commun..

[9]  Alexander L. Stolyar,et al.  Optimal utility based multi-user throughput allocation subject to throughput constraints , 2005, Proceedings IEEE 24th Annual Joint Conference of the IEEE Computer and Communications Societies..

[10]  Andreas Springer,et al.  Novel SINR-to-CQI Mapping Maximizing the Throughput in HSDPA , 2007, 2007 IEEE Wireless Communications and Networking Conference.