Multi-Group Random Access Resource Allocation for M2M Devices in Multicell Systems

The efficient service of a tremendous number of machine-type devices with heterogeneous traffic types may consider simple random access as a solution. For more rigorous analysis of system performance in multicell environments, it is required to consider not only the packet collisions within the same cell but also the interference from other cells. This letter analyzes signal-to-interference-ratio distributions and derives efficient resource allocation schemes for spatial multi-group random access in multicell systems, using the Poisson point process model.

I. Introduction

Of late, wireless communication industries have begun to discuss their scenarios serving machine-type communication devices such as meters/sensors as well as user equipments such as smart phones [1]. Such machine-type communication devices need intermittent uplink resources to report measured or sensed data to their serving base station (BS). It is however hard to dedicate limited uplink resources to each because of a huge number of them. Furthermore, machine-to-machine (M2M) traffics are quite heterogeneous; for example, smart metering has periodic traffics with relatively-loose delay requirements while e-health and vehicular communications have intermittent traffics with tight delay requirements. In order to provide a tremendous number of machine-type devices with these heterogeneous traffic types, simple random access can be considered as a efficient solution [2].