Multiband Scheduler for Future Communication Systems

Klaus  DOPPLER; Carl  WIJTING; Tero  HENTTONEN; Kimmo  VALKEALAHTI

doi:10.4236/ijcns.2008.11001

Klaus DOPPLER^*, Carl WIJTING^*, Tero HENTTONEN^*, Kimmo VALKEALAHTI^*

Abstract: Operation in multiple frequency bands simultaneously is an important enabler for future wireless communication systems. This article presents a new concept for scheduling transmissions in a wireless radio system operating in multiple frequency bands: the Multiband Scheduler (MBS). The MBS ensures that the operation in multiple bands is transparent to higher network layers. Special attention is paid to achieving low delay and latency when operating the system in the multiband mode. In particular, we propose additions to the ARQ procedures in order to achieve this. Deployment details and assessment results are presented for two multiband deployment scenarios. The first scenario is operation in a spectrum sharing context where multiple bands are used: one dedicated band for basic service and one shared extension band for extended services. In the second scenario we consider multiband operation in a relay environment, where the two bands have different propagation properties and relays provide extra coverage and capacity in the whole cell.

Keywords: Multiband Operation, Scheduling, Multiband Scheduler, IMT-Advanced, Relaying, Dynamic Spectrum Use, Flexible Spectrum Use, Spectrum Sharing

Cite this paper: nullDOPPLER, K. , WIJTING, C. , HENTTONEN, T. and VALKEALAHTI, K. (2008) Multiband Scheduler for Future Communication Systems. International Journal of Communications, Network and System Sciences, 1, 1-9. doi: 10.4236/ijcns.2008.11001.

References

[1] Recommendation ITU-R M.1645, "Framework and overall objectives of the future development of IMT-2000 and systems beyond IMT-2000", 2003.

[2] K. Hooli, S. Thilakawardana, J. Lara, J-P. Kermoal,S. Pfletschinger, "Flexible Spectrum Use betweenWINNER Radio Access networks", IST Mobile Summit, Greece, June 2006.

[3] K. Doppler, He Xiaoben, C. Wijting, A. Sorri,"Adaptive Soft Reuse for Relay Enhanced Cells",IEEE Vehicular Technology Conference 2007 spring, April 2007, pp 758-762.

[4] https://www.ist-winner.org

[5] M. Sternard, T. Svensson, G. Klang, "The WINNER B3G System MAC Concept", IEEE Vehicular Technology Conference 2006 fall, Sept 2006.

[6] IST-WINNER II, "D6.11.2 Key Scenarios and Implications for WINNER II", Sept. 2006, available at https://www.ist-winner.org/deliverables.html

[7] 3GPP TR 25.913 V7.3.0 (2006-03) Requirements for Evolved UTRA (E-UTRA) (Release 7).

[8] IST-WINNER II, “D3.5.2 Assessment of relay based deployment concepts and detailed description of multi-hop capable RAN protocols as input for the concept group work”, June 2007, available at https://www.ist-winner.org/deliverables.html

[9] K. Doppler, C. Wijting, J-P. Kermoal, “Multi-Band Scheduler for Future Communication Systems”, WiCom 2007, P.R: China, Sept. 2007, pp 6738-6742.

[10] Recommendation ITU-R M.1768, “Methodology for calculation of spectrum requirements for the future development of the terrestrial component of IMT-2000 and systems beyond IMT-2000”, 2006.

[11] Report ITU-R M.2078, “Spectrum requirements for the future development of IMT-2000 and IMT-Advanced”, 2006.

[12] Report ITU-R M.2079, “Technical and operational information for identifying spectrum for the terrestrial component of future development of IMT-2000 and IMT-Advanced”, 2006.

[13] M. Bennis, J. -P. Kermoal, P. Ojanen, J. Lara, S. Abedi, R. Pintenet, S. Thilakawardana and R. Tafazolli, “Advanced spectrum functionalities for 4G WINNER radio network”, Wireless Personal Communications journal, Springer 2007 (accepted for publication).

[14] K. Brueninghaus, D. Astely, T. Saelzer, et al. “Link performance models for system level simulations for broadband radio access systems”, Proceedings of the PIMRC 2005, Berlin, September 2005

[15] “Universal Mobile Telecommunications System (UMTS); Selection procedures for the choice of radio transmission technologies of the UMTS”, TR 101 112 v3.2.0 (1997-11), UMTS30.03

[16] IST WINNER II “D1.1.2 WINNER II Channel Models Part I Channel Models”, September 2007 available at https://www.ist-winner.org/deliverables. html

[17] IST WINNER II “D6.13.11 Final CG “metropolitan area” description for integration into overall System Concept and assessment of key technologies”, October 2007 available at https://www.ist-winner.org/ deliverables.html