Abstract:
In this paper, we propose a dynamic allocation scheme of random access channel (RACH) slots for categorized machine-to- machine (M2M) devices, in which delay-sensitive services coexist with delay-tolerant ones. Our scheme aims at alleviating the overload and congestion of machine-type (MTC) communication as well as satisfying both delay-sensitive and delay-tolerant services. In order to make full use of RA slots, our proposed scheme adopts a categorized machine-to-machine (M2M) networking, where the M2M devices categorized into several types based on their delay sensitivity and priority. The most delay sensitive and high priority devices will be included in Type 1. Other devices will be categorized in Type 2, Type 3 etc. based on their delay sensitivity and priority. Type 1 will be allocated the maximum number of RA slots. Other types will be provided less number of RA slots. Simulation result shows that our proposed scheme realizes the remarkable increase in improving the number of packets arriving successfully and completing RA.
