A Novel Power Ramping Scheme of M2M for WCDMA Random Access Channel

Machine-to-Machine (M2M) communication is rising to prominence in wireless communication. Due to various advantages, the cellular networks, which are designed and optimized for Human-to-Human (H2H) communication, have been considered as one of the best choices to bear M2M service. However, because of the specific characteristics of M2M communication, there must be many incompatible factors in practice, and the Random Access (RA) performance of H2H communication will also be affected severely. To evolve and develop competitive capabilities to support M2M communication, the system model of RA is built firstly, and then one power ramping strategy based on Logarithm is proposed for M2M. Numerical results show that the proposed algorithm can greatly improve H2H RA performance while maintaining the throughput of M2M communication. Meanwhile, the proposed strategy can also reduce the M2M transmit power to extend the battery life.