Abstract
A large number of small cells are densely deployed in the era of 5G and beyond 5G mobile networks to achieve high rate and low latency data transmission. Small cells are composed with fixed ground radio units (RUs) in the conventional networks, and thus the utilization rate of them is drastically deteriorated due to the spatio-temporal patterns of mobile traffic demand. To address this problem, adaptive network architectures have been investigated to reconfigure networks on demand using small cells mounted on moving objects such as vehicles and drones. However, it has been difficult to establish stable communication link to ground nodes in high-speed environments with these schemes. Therefore, this paper proposes a concept of small cells composed with crowdsourced RUs mounted on parked vehicles. They are activated based on the traffic demand in surrounding area by road side units (RSUs) assuming a smart city. The proposed idea is based on the correlation between the distribution of people and the occupancy rate of parking lots. It can efficiently improve user throughput with relatively small number of RUs. The feasibility of the proposed scheme is validated through numerical analysis, computer simulations, and experimental results.
Highlights
Along with the spread of various mobile services including cellular communication and Internet of things (IoT), the amount of mobile traffic has been increasing rapidly
IEEE802.11ac/ad wireless LAN equipments were used in the experiment; a distributed unit (DU) was simulated with IgniteNet’s MetroLinq 60-10G-360, a crowdsourced RUs (CRUs) was simulated with MetroLinq 60-LW, and user equipments (UEs) were ASUS’s RogPhone
Prominent spatio-temporal fluctuation in mobile traffic demand foreseen in the era of 5G and beyond would deteriorate the efficiency of conventional mobile networks
Summary
Along with the spread of various mobile services including cellular communication and Internet of things (IoT), the amount of mobile traffic has been increasing rapidly. An adaptive network architecture has been investigated to address this issue [7], [8] In this architecture, moving nodes relocate following the changes in the demand distribution to continuously provide connectivity for mobile users with small number of deployed nodes. The on-board RUs, which are called as crowdsourced RUs (CRUs), are activated on demand to compose small cells and relay traffic between DUs and UEs. The drivers receive monetary or non-monetary incentive from network operators as reward for forwarding mobile traffic. In this paper we propose a concept of on demand activation of small cells with CRUs mounted on parked vehicles for smart city. Stable wireless fronthaul links can be established with static channels by focusing on parked vehicles in stable environments It contributes to efficient deployment of mobile networks thanks to its high flexibility.
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