摘要：Typical machine type communication (MTC) applications require the MTC devices to be located in enclosed spaces, such as the cars or basement. These indoor MTC devices would experience an additional 20 dB penetration loss on the radio interface with respect to normal LTE devices. To guarantee the coverage of these indoor MTC devices, it is necessary to differentiate them from normal LTE devices and adopt dedicated compensation mechanisms. In this paper, we develop a unified differentiating algorithm suitable for any fading channels which are characterized by the probability distribution functions of receiving envelopes. Taking Rayleigh fading channel as an example, we carry out the performance analysis of this algorithm. The influences of additional penetration loss and proportion of indoor MTC devices on the error rate of discrimination is given out. In addition, we also proposed a dedicated power compensation mechanism with TTI bundling for indoor MTC devices to evaluate the link performance of this algorithm. Numerical results show that the proposed algorithm works well under Rayleigh fading and has a good ability to adapt the fast fading environment with profound stability.
关键词：Machine Type Communications; penetration loss; coverage improvement
