Reduced Feedback Links for Power Minimization in Distributed Multicell OFDMA Networks
In the next generation of multicell networks, adaptive resource allocation techniques will play an important role to improve both quality of service and spectral efficiency. In order to employ distributed power allocation for multicell Orthogonal Frequency-Division Multiple Access (OFDMA) networks, the Channel State Information (CSI) belonging to all users is required to share among base stations. However, the amount of feedback increases with the number of users, base stations and subcarriers. Therefore, it is important to perform a selection at the user side for multicell networks. In this paper, the authors propose reduced feedback links by choosing the users based on their approximate Signal to Interference Noise Ratio (SINR).