Capacity Analysis for Full Duplex Self-backhauled Small Cells

TL;DR

This paper analyzes the capacity of full duplex self-backhauled small cells, proposing a scheduling method that nearly doubles throughput under various conditions by mitigating interference.

Contribution

It introduces a novel scheduling approach combining back-pressure and geometric programming for FD self-backhauled small cells with SDMA, enhancing capacity.

Findings

Almost doubled throughput with FD SDMA backhaul links

Effective interference mitigation in asymmetric traffic scenarios

Significant capacity gains demonstrated through simulations

Abstract

Full duplex (FD) communication enables simultaneous transmission and reception on the same frequency band. Though it has the potential of doubling the throughput on isolated links, in reality, higher interference and asymmetric traffic demands in the uplink and downlink could significantly reduce the gains of FD operations. In this paper, we consider the application of FD operation in self-backhauled small cells, where multiple FD capable small cell base stations (SBS) are wirelessly backhauled by a FD capable macro-cell BS (MBS). To increase the capacity of the backhaul link, the MBS is equipped with multiple antennas to enable space division multiple access (SDMA). A scheduling method using back-pressure algorithm and geometric programming is proposed for link selection and interference mitigation. Simulation results show that with FD SDMA backhaul links, the proposed scheduler almost doubles throughput under asymmetric traffic demand and various network conditions.