Dual Connectivity in Heterogeneous Small Cell Networks with mmWave Backhauls

Figure 1

Small cell deployment scenarios in TR 36.872 [11]. (a) Intrafrequency eNB CA: SeNBs operate on the same carrier frequency as an MeNB (i.e., cochannel deployment). Due to backhaul delay, collaborative scheduling to avoid mutual interference between them is challenge. (b) Interfrequency eNB CA: SeNBs tune to different carrier frequencies like 3.5 GHz suitable to small cells. SeNBs create several small cell clusters within the macro coverage. (c) SeNBs without CA: only SeNBs without the overlaid MeNB are deployed.

(a) Intrafrequency eNB CA

(b) Interfrequency eNB CA

(c) Only small eNBs