An intercell coordination admission control and scheduling scheme for delay-tolerant M2M service

The emerging Machine-to-machine (M2M) communications are posing serious challenges to cellular network systems. When a high number of M2M devices try to send data almost simultaneously, the air interface congestion would result in significant quality of service degradation in conventional Humanto-Human (H2H) communications. To solve this problem, an uplink intercell coordination admission control and scheduling scheme (ACSS) in a CDMA multicell environment is proposed in this paper, which makes the best of M2M delay tolerant feature. Delay tolerant M2M connections in the home cell and neighbor cells can be interrupted to release resource for H2H services and reestablished later. The final M2M set to be scheduled is determined by the maximum throughput criterion and residual tolerant delay criterion. Simulation results have shown that with ACSS the H2H blocking probability can be guaranteed and M2M transmission failures can be reduced, achieving better system performance and higher resource utilization.