研究目的
To propose a heterogeneous metropolitan area network architecture that combines an IEEE 802.11 wireless mesh network (WMN) with a long-term evolution (LTE) network and to develop a new heterogeneous routing protocol and a routing algorithm based on reinforcement learning to select the appropriate transmission technology based on parameters from each network.
研究成果
The proposed heterogeneous network architecture and routing protocol significantly improve the overall network capacity and enhance the average throughput. The simulation results show that the proposed network achieves up to 200% more throughput compared with Wi-Fi-only networks and LTE-only networks. The LTE network is utilized to avoid congested Wi-Fi nodes and a high-interference path in the WMN, whereas the WMN offloads the load of the LTE network, reduces the cost of using more licensed frequency bands, and forwards the data to another node when the LTE throughput is degrading.
研究不足
The study focuses on a single cell of the LTE network and assumes no interference between the networks because different frequency bands are employed by the wireless networks. The simulation scenarios are limited to grid and random topologies with a maximum of 30 nodes.
1：Experimental Design and Method Selection:
The study employs a simulation approach using the NS-3 simulator to evaluate the proposed heterogeneous WMN (HetMeshNet) architecture. The LENA NS-3 LTE Module model is used for validation. The proposed network is compared in terms of throughput with LTE-only networks, Wi-Fi-only networks, and a random network that randomly allocates an LTE or a Wi-Fi network for each node.
2：Sample Selection and Data Sources:
Two types of scenarios are employed to evaluate and validate the proposed network: grid topologies and random topologies. In both scenarios, there are five mesh gateways distributed in the network, and the LTE eNB is allocated in the center. Different loads are applied to the network using 19 and 30 nodes transmitting simultaneously for both uplink and downlink transmissions.
3：List of Experimental Equipment and Materials:
The simulation setup includes parameters for LTE and Wi-Fi networks, such as bandwidth, transmission power, and frequency bands.
4：Experimental Procedures and Operational Workflow:
The performance of HetMeshNet is compared with LTE-only and random networks, using different numbers of radio resource blocks (RBs), and Wi-Fi-only networks. Two types of scenarios are employed to test the uplink and downlink transmissions.
5：Data Analysis Methods:
The simulation results are analyzed to compare the throughput of the proposed network with benchmark networks. ANOVA statistical tests and Fisher's least significant difference (LSD) test are used to verify the results.
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