December 22, 2016

Self-optimizing adaptive transmission mode selection for LTE-WLAN aggregation

  • Balan I.
  • Laselva D.
  • Perez E.
  • Wegmann B.

As licensed spectrum is scarce and users have ever increasing throughput and data volume requirements, mobile network operators (MNOs) are looking for innovative ways for using the unlicensed spectrum. One such solution is LTE-WLAN aggregation (LWA) where a LTE radio bearer can be served by making use of both LTE and WLAN resources in a flexible manner. This paper proposes a self-optimizing algorithm that tunes the aggregation mode and controls how data is split between LTE and WLAN. Results show that the proposed algorithm is able to derive the optimal control parameter settings per cell under different load conditions. As a result, improved average and 5th percentile UE throughput values are observed along with a more even throughput distribution among LWA and non-LWA users. The performance of individual cells in the scenario is also leveled out thanks to the SON algorithm.

View Original Article

Recent Publications

January 01, 2018

Fair Dynamic Spectrum Management for QRD-Based Precoding with User Encoding Ordering in Downstream G.fast Transmission

In next generation DSL networks such as G.fast, employing discrete multi-tone transmission in high frequencies up to 212 MHz, the crosstalk among lines reaches very high levels. To precompensate the crosstalk in downstream transmission, QRD-based precoding has been proposed as a near-optimal dynamic spectrum management (DSM) technique. However, the performance ...

January 01, 2018

Practical Mitigation of Passive Intermodulation in Microstrip Circuits

This paper presents new experimental evidence and a novel practical approach for mitigation of passive intermodulation (PIM) in microstrip circuits fabricated on commercial printed circuit board laminates. The mechanisms of distributed PIM in microstrip circuits are reviewed and a phenomenology of PIM generation due to locally enhanced electromagnetic fields at ...

January 01, 2018

Efficient Cooperative HARQ for Multi-Source Multi-Relay Wireless Networks

In this paper, we compare the performance of three different cooperative Hybrid Automatic Repeat reQuest (HARQ) protocols for slow-fading half-duplex orthogonal multiple access multiple relay channel. Channel State Information (CSI) is available at the receiving side of each link only. Time Division Multiplexing is assumed, where each orthogonal transmission occurs ...