Abstract

Wireless Fidelity (WiFi) is becoming more popular for its ability to provide cost-effective solutions to overcome call drops occurring in cellular networks due to poor signal strength. We focused on Voice over Internet Protocol (VoIP) over WiFi as Voice over WiFi (VoWiFi) in our study. We have developed analytical models incorporating Arbitration Inter-frame Spacing (AIFS) to boost the VoWiFi cell capacity of IEEE 802.11ax (i.e. sixth generation Wireless Local Area Network (WLAN) standard). Using DCF Inter-frame Spacing (DIFS) and AIFS, we have estimated VoWiFi cell capacity with/without Request To Send (RTS) and Clear To Send (CTS) frames for constant bit rate (CBR) traffic. Further, we have extended our models to support retransmission mechanism to prevent packet loss and compared results using DIFS and AIFS to determine their efficiency.

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