Spectrum scheduling for 3G and 4G networks by intra-operator flexibility

This paper proposes a multi-carrier waveform based intra-operator spectrum scheduling concept for 3G and 4G wireless communication systems for Femto and Macro deployments. The concept considers the flexible air-interface of 5G and can support coordinated intra-operator spectrum scheduling and sharing in various scenarios. Furthermore, the proposed concept allows high flexibility both in spectrum allocation and adaptation of the transmission signals to support the large variety of devices. The key elements of the proposed concept includes the determination of the technology needs in 3G, 4G Femto and macro deployments and incoming 5G network, then a two-stage allocation procedure. There is a fragmented spectrum usage, and adaptation of multi-carrier waveforms. Preliminary hypothetical measurements show the user data throughput is well managed and in fact is enhanced with the introduction of a unified spectrum pool manager having a single pool of complete spectrum band for 3G and 4G. Results have shown that the proposed concept allows efficient and flexible fragmented spectrum usage, with robustness against the interference levels and synchronization issues. The operator will be able to provide better services than the existing 3G networks as the spectrum will be allocated on need basis from a common pool and so it is possible that the end user will get a better data rate than existing. As the end user satisfaction will be better, so it will attract more customers resulting good revenue for operator.