Inband Full-Duplex Self-backhauling in Ultra-Dense Networks

Abstract

This chapter investigates how to utilize the recently developed inband full‐duplex (IBFD) technology to further improve the efficiency of wireless self‐backhauling. In particular, it considers a scenario where one macro base station (BS) serves several densely deployed access nodes (ANs), each of which serves an individual user equipment (UE). The ANs use a wireless link to backhaul the data from the UEs to the BS and vice versa. Three different self‐backhauling strategies are evaluated under Quality‐of‐Service (QoS) requirements for the UEs by determining the minimal transmit powers with which the QoS requirements can be fulfilled. Two of these strategies rely on the IBFD technology, while one of them uses time‐division duplexing (TDD) to communicate in a traditional half‐duplex (HD) manner. In addition, these AN‐based solutions are compared to a HD reference scheme where the BS communicates directly with the UEs.