An SDN-Based Architecture for Smart Handover to Improve QoE in IEEE 802.11 WLANs

A Fuzzy Logic System for Vertical Handover and Maximizing Battery Lifetime in Heterogeneous Wireless Multimedia Networks

“…The proposal [9] uses the QoE to select the best connection; the QoE was evaluated using Mean Opinion Score (MOS) in real time, through the PSQA (Pseudosubjective Quality Assessment) technique based on statistical learning through RNN (Random Neural Network). In [10] a Software-Defined Networking (SDN) architecture was proposed to implement a handover decision strategy based on fuzzy system considering QoS and QoE requirements; the fuzzy system is able to monitor a set of APs (Access Points) for the selection of the best AP to the user. In [11], the proposal is a multicriteria algorithm combining fuzzy system and utility function as a decision strategy.…”

“…The proposal uses the fuzzy system to support the input imprecision information, while the utility function is responsible for reducing the number of handovers. The papers [8,10], though proposing improvements to QoE, do not provide support for energy consumption. Although the proposal [11] considers multiple criteria such as delay, available bandwidth, and received signal strength, however the QoE and power consumption were not considered.…”

“…The objective is to demonstrate the benefits of the proposed architecture in relation to the original architecture, as well as to compare the performance of the proposal with other papers researched in the literature. The proposal has been compared in relation to papers [8][9][10][11]. The proposals [8][9][10][11] were adapted for the NS-2 simulator to the performance comparison.…”

“…The proposal has been compared in relation to papers [8][9][10][11]. The proposals [8][9][10][11] were adapted for the NS-2 simulator to the performance comparison. The mobility model used was Random Way Point, so the movements and speed of the mobile users were random in the simulation.…”

“…The mobile user in the architecture without Fuzzy System (Original Architecture) was connected for approximately 47 minutes, in the paper [11] was 48,5 minutes, in the paper [10] was 50,3 minutes, in the paper [9] was 51,2 minutes, in the paper [8] was 52 minutes and while the mobile user with an energy-saving policy was connected for 58 minutes (Figure 4). There is a gain in energy because with the Fuzzy System the handover in the network takes place when the battery level of the device is low.…”