Jean-Philippe Kermoal

Spectrum Sharing for WINNER Radio Access Networks

This paper presents the concept of spectrum sharing in connection to beyond 3rd generation (B3G) systems. Inter-system spectrum sharing mechanisms are summarised and classified depending on their coordination capabilities and the relative priorities between the systems involved in the sharing. Novel radio resource management (RRM) functionalities for coordinating the sharing of the spectrum with legacy systems and other B3G radio access networks (RANs) are outlined to permit the efficient implementation of spectrum sharing. These B3G spectrum sharing RRM functionalities are proposed in the context of the European IST WINNER project. Capabilities to share spectrum with other radio access systems will significantly increase the efficiency of the WINNER system as well as the compatibility with legacy systems. The RRM architecture enables WINNER systems to benefit from the most important aspects of the envisioned spectrum sharing. Spectrum sharing provides the WINNER system with new spectrum access possibilities, facilitating flexible deployment, usage and a gradual evolution of the system in coexistence with legacy systems

Multi-Band Scheduler for Future Communication Systems

This paper presents a new concept for scheduling transmissions in a wireless radio system operating at multiple frequency bands: the multi-band scheduler (MBS). The MBS ensures transparency of the operation on multiple bands for the higher network layers. Special attention is paid to achieve low delay and latency when operating the system in the multi-band mode. Particularly we propose additions to the ARQ procedures to achieve this. Further, we work out in detail two deployment scenarios for multi-band scheduling. Firstly 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. Secondly we consider multi-band operation in a relay environment where the two bands have different propagation properties and relays provide extra coverage and capacity in the whole cell.

Comparison of Correlation-Based and Ray-Based Radio MIMO Channel Models

This paper presents a comparison between a correlation-based and a ray-based MIMO (multi-input multi-output) model. The correlation-based model has been presented in the literature under the European IST-METRA project. The ray-based model has been elaborated for the 3GPP standard group under the acronym of SCM. Using the input parameters of the 3GPP SCM model specification as a reference, link level simulations results generated from the two MIMO channel models are being compared by examining the channel coefficients and BLER (block error rate) produced by the models. When comparing the simulation results, it was found that the differences between the models are negligible. This implies that either one of the models can be used to generate channel coefficient realizations