Distributed Admission Control with Soft Resource Allocation for Hybrid MAC in Home M2M Networks

To guarantee the quality of service for different delay-sensitive sessions while enhancing resource utilization in home machine-to-machine network is a challenging issue. To solve this problem, we propose a Distributed Admission Control Algorithm with Soft Resource Allocation (DACA-SRA) for hybrid medium access control in home machine-to-machine networks. The proposed DACA-SRA can enable resource (i.e. transmission opportunities) while achieving guaranteed quality of service for real-time sessions in the contention-free period. This can let contention-free period to serve additional real-time sessions having stringent delay but loose throughput demands. Moreover, it can let the real-time sessions which fail in obtaining resources in the contention-free period to temporarily utilize resources in contention-access period through contention. These real-time sessions can be admitted later when resources in the contention-free period become sufficient. Simulation results demonstrate that the DACA-SRA can improve network utilization (i.e. accommodating additional real-time sessions to reserve resources in the contention-free period) in practical cases where real-time sessions with diverse quality of service requirements co-exist.