Resource allocation management is the key issue to improve the performance of visible light communication (VLC) / WiFi hybrid network. This paper proposes an improved resource allocation algorithm based on proportional fairness (PF) algorithm. Its main idea is to compensate users, and then establish a VLC / WiFi hybrid network model to simulate the traditional algorithm and the improved algorithm respectively, It is verified that the improved algorithm has better fairness and higher throughput than the traditional algorithm.
The increasing demand of mobile network communication bandwidth requires more information in the limited bandwidth. In this paper, a novel bidirectional transmission system architecture based on RoF-PON system and PWoF system is proposed, and the transmission performance of the hybrid system is simulated. In RoF-based mobile networks, the use of PWoF realizes the centralize power in CO, providing a more cost effective installation method for communication networks, as well as ease of operation and maintenance. The simulation results of the system verify the reliability and feasibility of the system, which proves that the hybrid transmission system of PWoF and RoF-PON can realize the bidirectional transmission of energy and wireless signals.
In the heterogeneous network of visible light communication and WiFi, the fairness index of users is a key index when allocating resource bandwidth. In order to improve the fairness of the system, the average request rate of users and the distance from the wireless access point are mainly considered, and a new weight-based multi-team resource allocation algorithm is proposed to judge the priority of users based on these two indexes. First, the request rates of users are ranked in order, and the first and last two users are formed into a queue, and the first allocation is made according to the weight of the queue, and then the second allocation is made according to the respective weights of the users in the queue. The simulation results show that the fairness index is improved and the improved algorithm can be applied to resource allocation in heterogeneous networks.
In order to solve the problem of joint resource management algorithm of visible light communication (VLC) and WiFi heterogeneous network, this paper studies different resource scheduling algorithms, and finally chooses improved proportional fair (PF) algorithm to improve the system in different regions of the user access to resources, and optimize the utilization of resources. The simulation results show that the optimized scheduling algorithm can improve the system throughput, fairness and access delay probability (ADP).
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