Scheduler-dependent inter-cell interference and its impact on LTE uplink performance at flow level

Authors:
D. C. Dimitrova;G. Heijenk;J. L. van den Berg;S. Yankov
Affiliations:
University of Twente, Enschede, The Netherlands, Bern, Switserland;University of Twente, Enschede, The Netherlands, Bern, Switserland;University of Twente, Enschede, The Netherlands, Bern, Switserland and TNO ICT, Delft, The Netherlands;Technical University Sofia, Bulgaria
Venue:
WWIC'11 Proceedings of the 9th IFIP TC 6 international conference on Wired/wireless internet communications
Year:
2011

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Abstract

The Long Term Evolution (LTE) cellular technology is expected to extend the capacity and improve the performance of current 3G cellular networks. Among the key mechanisms in LTE responsible for traffic management is the packet scheduler, which handles the allocation of resources to active flows in both the frequency and time dimension. This paper investigates for various scheduling scheme how they affect the inter-cell interference characteristics and how the interference in turn affects the user's performance. A special focus in the analysis is on the impact of flow-level dynamics resulting from the random user behaviour. For this we use a hybrid analytical/simulation approach which enables fast evaluation of flow-level performance measures. Most interestingly, our findings show that the scheduling policy significantly affects the inter-cell interference pattern but that the scheduler specific pattern has little impact on the flow-level performance.