Dynamic Spectrum Sharing Algorithm for Combined Mobile Networks

This paper proposes a new dynamic spectrum-sharing algorithm for combined cellular networks which can allow users to access both networks simultaneously using the same spectrum resource. This article proposes an algorithm to save spectrum resources due to the limited and costly bands. The proposed method for enhancing the spectrum utilization of combined radio interface (CRI) is called the dynamic spectrum sharing algorithm (DSSA). The proposed algorithm dynamically reallocates the occupied channels to meet the quality of service (QoS) requirements for each user. This is a different idea from traditional static spectrum sharing algorithms (SSSA). In the proposed DSSA, spectrum utilization is enhanced by dividing the entire spectrum into three separate zones: determination zone, which is occupied concurrently by GSM or LTE users, and fixed zones just for GSM and LTE users, respectively.