Paul Marinier

D2D neighbor discovery interference management for LTE systems

Direct Device-to-Device (D2D) communications in cellular systems has attracted a lot of interest for both commercial and public safety applications. To support D2D communications, a first step involving neighbor discovery is typically needed. This paper focuses on the study of neighbor discovery signal design aspects and interference management for D2D discovery under a typical LTE system deployment. System level results on detection rate and range comparing different interference management techniques are provided. The results indicate that practical interference management techniques have the potential to improve the performance of neighbor discovery for cell-edge devices significantly.

Power Control in 802.11 Wireless LANs

This paper presents applications of power control techniques for performance enhancement of 802.11 wireless LANs. It is shown how the nature of the multiple-access scheme in use in these systems poses challenges for the implementation of an approach based on reduction of interference. It is also shown that the use of power control at the access point to manage its coverage area can lead to very significant performance gains. The analysis is supported by dynamic simulations providing end-to- end performance results for FTP application.

System-Level Performance Evaluation of HSDPA/HSUPA with TCP-Based Application

We assess the system-level performance of 3GPP Release 5 and Release 6 systems with a downlink-oriented TCP- based application (FTP). We first investigate whether the traffic due to the TCP acknowledgments sent to the server can overload the capacity of the Release 5 uplink when a set of high performance UEs simultaneously download. Next we investigate the download performance with realistic uplink scheduling delays in Release 5 and the benefit due to the uplink enhancements brought by HSUPA (Release 6). It is found that, although the TCP acknowledgments do not overload the capacity of the uplink in Release 5, significant improvements will be obtained with Release 6 thanks to the faster uplink scheduling.