A novel RACH mechanism for machine type communications in cellular networks

A Successive Interference Cancellation Based Random Access Channel Mechanism for Machine-to-Machine Communications in Cellular Internet-of-Things

“…On contrary, the authors in [5] have proposed to utilize the inter-slot SIC, wherein, the devices are allowed to transmit repeatedly for a finite number of times in a given radio frame, and thereafter, the success rate is improved by applying back-and-forth (interslot) SIC at the BS. An analytical model of the SIC-based RACH mechanism proposed in [5] has been presented in [6]. However, to the best of our knowledge, the joint utilization of This work is licensed under a Creative Commons Attribution 4.0 License.…”

“…Here, τ denotes the root mean square of the delay spread. On the contrary, an SIC-based RACH mechanism, which utilizes inter-slot SIC (SIC in the previous slots) to decode the Msg-3 of collided devices, has been proposed in [5] and [6]. In this mechanism, the devices are allowed to repeat their transmissions in a finite number of time slots in a given radio frame.…”

“…In this mechanism, the devices are allowed to repeat their transmissions in a finite number of time slots in a given radio frame. In [5] and [6], it has been assumed that each Msg-3 carries information about all its previous transmissions. After successfully decoding Msg-3 of a particular device, the BS extracts the time slots where the device has previously transmitted and recursively performs SIC to successfully obtain the Msg-3 of other devices in the previous slots.…”