Presentation Information
[B-11-13]Performance Analysis of Grant-Based Access Using Serving-Distance-Dependent Zero-Cell Area Distribution
◎Yusuke Miyamori1, Chen Guanzhou2, Shigeo Shioda2 (1. Graduate School of Science and Engineering, Chiba Univ., 2. Graduate School of Informatics, Chiba Univ.)
Keywords:
Grant-Based Access,Voronoi Tessellation,Poisson Point Process,Zero-Cell Area Distribution
In Massive Machine Type Communication (mMTC), efficient access control is essential to support a massive number of devices transmitting small amounts of data. This paper analyzes the transmission success probability of a grant-based access scheme on a single resource, which avoids intra-cell collisions by allowing each base station to grant transmission permission to at most one active device within its cell. To strictly evaluate this transmission success probability, it is necessary to consider both the transmission grant probability and the impact of interference from devices transmitting in other cells. Since randomly distributed devices statistically tend to belong to larger cells, accurately deriving the transmission grant probability requires reflecting this property and utilizing a zero-cell area distribution that depends on the distance between the device and the base station. By approximating the zero-cell area conditioned on this distance using a gamma distribution, the conditional transmission grant probability is formulated. Furthermore, the conditional signal-to-interference ratio (SIR) coverage probability is obtained, and an analytical approximation for the final transmission success probability is derived. Simulation results validate the proposed approximation and clarify the fundamental performance of the grant-based access scheme.