Date Added: Mar 2013
In this paper, the authors propose a dynamic resource allocation method to enable efficient and low-latency Machine Type Communications (MTC) in LTE/LTE-A with the Contention Based random Access (CBA) scheme. In the proposed method, they firstly estimate the probabilities of events caused by a CBA transmission and then calculate the latency with the measured resource unit. They increase the amount of CBA resources until the estimated latency satisfies the application QoS requirement. The simulation results demonstrate that with the proposed resource allocation method for CBA, the uplink channel access latency has been drastically reduced and that it always guarantees the latency requirements.