Abstract
Abstract In this paper, we design full-duplex (FD) medium access control (MAC) protocol for co-existing wireless local area networks (WLANs) in 5G cellular networks (WCFD-MAC). Our design considers some significant features of 5G networks, exceptionally, beamforming and FD capabilities at both, the base station and user equipment. FD communications may generate interferences, namely self-interference (SI) in bidirectional FD (BFD) and inter-user interferences in three-node FD (TNFD). Several efforts have been performed to mitigate the SI in BFD communications. However, the inter-user interferences in TNFD are still considered as a major drawback in FD networks. These interferences must be mitigated by an efficient MAC protocol design. WCFD-MAC protocol allows two neighboring users to simultaneously participate in TNFD communication without interfering with each other by using directional transmission and a three-node angle condition (TAC). Directional transmission combined with TAC increases system throughput. WCFD-MAC protocol allows a new half-duplex (HD) communication scheme referred to as three-node HD (TNHD). This scheme may occur when bidirectional FD (BFD) and TNFD communications cannot occur. TNHD scheme includes device-to-device (D2D) communication and allows energy efficiency, which is one of the keys requirements of 5G wireless networks. Simulations results show that WCFD-MAC protocol achieves higher throughput than existing works in the literature.
Highlights
Multi-radio access technology (RAT) carrier aggregation is a technique that allows channels from different RATs to be aggregated and allocated to the end-user [1]
To mitigate the inter-user interferences in three-node FD (TNFD) communications, we proposed an optimal three-node angle condition (TAC) based on the width of the beams of the antennas, AOA, and mathematical cosine and sine rules
The proposed TAC allows two neighbor UEs to simultaneously participate in TNFD communication without interfering with each other
Summary
Multi-radio access technology (RAT) carrier aggregation is a technique that allows channels from different RATs to be aggregated and allocated to the end-user [1]. The characteristics of the future co-existing WLANs in 5G cellular networks have to satisfy most of the defined requirements for 5G cellular networks, such as FD capability, massive MIMO and mmWave technologies, beamforming/directional antennas capability, low latency, high throughput, energy and spectral efficiencies. In our MAC protocol design, two users can simultaneously participate in a TNFD communication if an angle condition is satisfied between them, such that the inter-user interference is mitigated even if they are in the transmission range of each other. - A new HD scheme (TNHD) is proposed in our design, which can enhance the throughput of the UEs at the covered small cell border and contribute to the energy efficiency in 5G networks. TNFD inter-user interferences and mitigation, Section V introduces the designed WCFD-MAC protocol, the performance evaluation of our proposal is presented, Section VII presents the conclusion and future works TNFD inter-user interferences and mitigation, Section V introduces the designed WCFD-MAC protocol, the performance evaluation of our proposal is presented in Section VI, Section VII presents the conclusion and future works
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