Downlink scheduling for user equipment served by multiple mobile terminals in cellular systems

An opportunistic downlink scheduling algorithm, which is referred to as Scheduling scheme for Multiple Mobile Terminals Serving the same User equipment (SMMTSU), is presented for the case when there exists User Equipment (UE) that is served by multiple Mobile Terminals (MTs) in a time-slotted cellular system. We study three scenarios, namely (i) when the MTs are served by the same cellular provider but scheduler has no knowledge of the presence of such UEs; (ii) when the MTs are served by the same cellular provider and the scheduler located in the base station knows the presence of such UEs; and (iii) when such MTs are served by different cellular providers. We establish the optimality and present the main properties of SMMTSU for scenario (ii). In scenario (iii), we show that it is better to use the MTs from one cellular provider using SMMTSU rather than from different cellular providers. Simulations under High-Speed Down-link Packet Access (HSDPA) model are implemented which show that SMMTSU works well and provides an approximately 20% throughput improvement for the UEs in scenario (ii) as compared to scenario (i). The simulation results also show that there is generally a 7% throughput benefit if the users take service from a single cellular provider.

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

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

[3]  M. Gudmundson.  Correlation Model for Shadow Fading in Mobile Radio Systems , 1991 .

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

[5]  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..

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

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

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

[9]  Mehul Motani,et al.  Downlink Scheduling for User Equipment Served by Multiple Mobile Terminals , 2011, 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011.

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

[11]  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).