Abstract
In-band full duplex has emerged as a solution for high data rate and low access delay for 5G wireless networks after its feasibility has been demonstrated. However, the impact of the in-band full duplex on the system-level performance of multi-cell wireless networks has not been investigated thoroughly. In this paper, we conduct an extensive simulation study to investigate the performance of in-band full duplex for indoor 5G small cell wireless networks. Particularly, we compare the in-band full duplex with static and dynamic time division duplexing schemes which require much less hardware complexity. We examine the effects of beamforming and interference cancellation under various traffic demands and asymmetry situations in the performance comparison. Our objective is to identify under which condition and with which technology support the in-band full duplex becomes advantageous over the simpler duplexing schemes. Numerical results indicate that for highly utilized wireless networks, in-band full duplex should be combined with interference cancellation and beamforming in order to achieve a performance gain over traditional duplexing schemes. Only then in-band full duplex is considered to be advantageous at any number of active mobile stations in the network and any downlink to uplink traffic proportion. Our results also suggest that in order to achieve a performance gain with the in-band full duplex in both links, the transmit power of the access points and the mobile stations should be comparable.
Highlights
In order to meet the future society’s crave for high data rate and capacity requirements, the generation of wireless networks, namely 5G, must support one thousand times higher mobile data volume per area and ten to hundred times higher data rate per user than today [1, 2]
If we can reduce the level of interference in In-band full duplex (IBFD), we could achieve a performance gain over D-time division duplex (TDD) and static TDD (S-TDD)
6 Conclusions In this paper, we investigated the performance of IBFD in comparison to dynamic TDD (D-TDD) for 5G wireless networks
Summary
In order to meet the future society’s crave for high data rate and capacity requirements, the generation of wireless networks, namely 5G, must support one thousand times higher mobile data volume per area and ten to hundred times higher data rate per user than today [1, 2]. The authors of [11] arrived to the conclusion that there is a strong need for a MAC protocol for IBFD wireless networks that intelligently switches between IBFD and half duplex based on different network configurations Both APs and mobile stations (MSs) are assumed to have IBFD capabilities in [10] and [11]. We conduct an extensive simulation study to investigate the performance of in-band full duplex for indoor 5G small cell wireless networks. Our investigation considers various traffic demands and asymmetry levels as well as different power settings of APs and MSs. We examine the performances of DL and UL separately because the IBFD is known to enhance the performance of one of the links at the expense of the other, making the total network throughput a non-intuitive performance metric. If we can reduce the level of interference in IBFD, we could achieve a performance gain over D-TDD and S-TDD
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