Auction-Based Random Access Load Control for Time-Dependent Machine-to-Machine Communications

Random access channel (RACH) contention issue has drawn great attention due to the prospering development of machine-to-machine (M2M) and Internet-of-Things (IoT) applications. Since a high preamble transmission rate is the direct cause of RACH contention, in this paper, we propose a two-stage scheme to control preamble transmission in multiple periods. In stage I, we design an auction method to balance and allocate the RACH transmission traffic among periods. In stage II, we propose an RACH attempt estimation method to control the preamble transmission rate decided by stage I. Through the two-stage scheme, we can efficiently handle a great number of random access request coming from diverse M2M applications.