Abstract
Random access (RA) scheme is one of the critical issues for successfully and efficiently connecting devices in the Internet of Things (IoT) networks. In cellular-based IoT networks, Zadoff–Chu (ZC) sequences are used as preambles, where their cyclically shifted versions are orthogonal to each other. We propose a time-shifted RA scheme for cellular IoT networks to reduce collision and to accommodate more devices, which can also increase fairness. In the proposed scheme, each IoT device efficiently adjusts the amount of cyclic shift of ZC sequences during preamble generation phase. We formulate an optimization problem to minimize average collision probability and provide an algorithmic solution. Simulation reveals that our proposed scheme can achieve near-perfect fairness while effectively mitigating collision probability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
