Abstract
To accommodate massive access for machine-type communication (MTC) in cellular networks, we propose a signal-to-interference ratio based clustering for the MTC. The cluster heads operate as single hop relays between successfully decoded MTC devices (MTCDs) and the base station (BS), reducing the signaling overhead. MTCDs randomly select channels to transmit on, and therefore create interference to each other. Unlike related work assuming known interference values for each link, we use stochastic geometry to characterize the received signal and interference powers. Given limited spectrum resources for MTC, we derive the outage probability expression and analytically calculate the maximum density of MTCDs that can be supported under an outage constraint. Moreover, the optimal partitioning of spectrum resources into the MTCD-to-cluster head links and relay links for maximum transmission capacity is presented.
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