Abstract
In this paper, we propose network-assisted device-to-device (D2D) communication in licensed and unlicensed spectrum interoperable networks, to improve D2D users’ throughput while alleviating the spectrum scarcity issue of cellular networks. The idea of licensed and unlicensed spectrum interoperability is based on the findings of the IEEE 1932.1 working group. Conventionally, D2D users were only able to communicate by using either cellular or non-cellular networks and no interoperability mechanism was available. The proposed scheme brings in many benefits including but not limited to higher D2D users’ throughput, alleviation in spectrum scarcity issue of cellular networks, and better network management. However, ensuring quality-of-service (QoS) in this dynamic environment is a challenging task. To this end, we analyze the QoS using a well-known analytical tool “Effective Capacity (EC)” for eNodeB-assisted as well as WiFi-assisted D2D communication. Moreover, we also see the impact of neighboring cells’ load and full-duplex transceiver at eNodeB and WiFi access point on the EC of D2D users. Simulation results show that EC increases with a decrease in neighboring cell’s load and decreases when more stringent QoS constraints are imposed. Results also show that the maximum sustainable source rate at the transmitter’s queue increases with an increase in maximum allowed packet delay but converges to a maximum value soon after that.
Highlights
The telecom sector has witnessed an exponential growth in the number of connected devices in the last decade
The spectrum scarcity issue is a bottleneck for the cellular networks and the telecom community is actively looking for alternate spectrum and technologies which can help in envisioning the true breadth of 5G
As the communication will be done on unlicensed frequency spectrum, WiFi access points (APs) as well as DR will experience severe interference from other services co-existing in the industrial, scientific, and medical (ISM) radio band (e.g. baby monitors, 3we assume that the transmitter (DT ) has the perfect channel state information (CSI); S(t)=CeNB (t)
Summary
The telecom sector has witnessed an exponential growth in the number of connected devices in the last decade. D2D communication in this new paradigm of licensed and unlicensed spectrum interoperability can help in alleviating the spectrum scarcity problem by increasing the licensed spectrum reuse as well as utilizing the unlicensed spectrum This way, exponential growth in capacity can be achieved without experiencing inter-cell interference. It can help in realizing the energy-efficient (due to reduced transmission power levels) and low-latency (because of the direct link) communication systems, which are the key components of the 5G cellular networks. They have presented four potential application scenarios (machineto-machine communication, multi-access edge computing, ultra-dense networks, and space-air-ground integration) to highlight the benefits of the proposed framework Their simulation results have shown the efficacy of their proposed framework which can dynamically allocate licensed and unlicensed spectrum by keeping in view the channels state information, interference level, and demand of the users. For the readers’ facilitation, TABLE 1 shows all the mathematical notations used in this paper for convenient referencing
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
