Scaling Laws for the Ergodic Capacity of Hybrid Wireless Networks with Distributed Base Stations

Abstract

This paper considers the problem of how the ergodic throughput capacity scales in hybrid wireless networks under the infrastructure mode. As opposed to the existing hybrid wireless networks in which the base station only serves individual cell area, the concept of distributed base stations (DBS) is introduced to achieve transmit/receive diversity in this paper. We model the hybrid wireless network with DBS as a multi- cell virtual MIMO system. In addition, a successive interference cancelation (SIC) strategy and the frequency reuse scheme are employed to limit the intra-cell interference and other-cell interference (OCI), respectively. The ergodic throughput capacity, which is an indicator of spectrum efficiency, is investigated over the independent but not identically distributed composite fast fading channels. It is analytically shown that compared to the traditional hybrid wireless network, the ergodic throughput capacity of hybrid wireless networks with DBS scales with gain with N×NBS.