Joint Backhaul-Access Access Analysis of Full Duplex Self-Backhauling Self Backhauling Heterogeneous Networks
Abstract: With the successful demonstration of in-band in full-duplex duplex (IBFD) transceivers, a new research dimension has been added to wireless networks. This paper proposes a use case of this capability for IBFD self-backhauling self backhauling heterogeneous networks (HetNets). IBFD self self-backhauling backhauling in a HetNet refers to IBFD-enabled IBFD small cells backhauling themselves with macro cells over the wireless channel. Owing to their IBFD capability, apability, the small cells simultaneously communicate over the access and backhaul links, using the same frequency band. The idea is doubly advantageous, as it obviates the need for fiber backhauling small cells every hundred meters and allows the access sspectrum pectrum to be reused for backhauling at no extra cost. This paper considers the case of a two-tier two tier cellular network with IBFD-enabled enabled small cells, wirelessly backhauling themselves with conventional macro cells. For clear exposition, the case considered is that of the Frequency Division Duplexing (FDD) network, where within access and backhaul links, the downlink (DL) and uplink are frequency duplexed (f1 , f2 respectively), while the total frequency spectrum used at access and backhaul (f1+f2 ) is the same. same Analytical expressions for coverage and average DL rate in such a network are derived using tools from the field of stochastic geometry. It is shown that DL rate in such networks could be close to double that of a conventional TDD/FDD selfself backhauling network, twork, at the expense of reduced coverage due to higher