Realization of a new random access scheme for resource efficiency in M2M communications

To raise the resource efficiency in Machine-to-Machine (M2M) communication, we realize a new random access (RA) procedure. In the improved RA scheme, we use Code Division Multiple Access (CDMA) to transmit User Equipment Identity (UE ID) and Cyclic Redundancy Check(CRC) information in the first step of RA procedure, and then distinguish each UE and detect preamble collisions in the second step. We then analyse RB allocation between Physical Uplink Shared Channel (PUSCH) and Physical Random Access Channel (PRACH) accordingly. Results show that the new scheme has a good performance and can save resource up to 40%.