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The ubiquitous nature of the Internet of Things (IoT) constitutes a set of stringent quality of service (QoS) requirements from the underlying 5G network. To address the issues, this paper proposes an enhancement for the channel access period (CAP) of the widely used IEEE 802.15.3C (millimeter wave (mmW)) standard using a priority mechanism that fulfills the requirement of prioritized channel access for the IoT based applications. According to the hybrid medium access control (MAC) protocol of the IEEE 802.15.3C, to reserve time-division multiple access (TDMA) based slot in channel time allocation period (CTAP), a node will first send a channel time allocation (CTA) request to piconet controller (PNC) by using carrier-sense multiple access with collision avoidance (CSMA/CA) mechanism in the contention-access period (CAP). After successful delivery of CTA’s request, PNC will reserve a CTA for a specific node …