A Hybrid Slot Allocation Algorithm for TDMA Network
Weizhen Tian, Ming-rui Guo, Xiong-chang Pang · Atlantis Press eBooks · 2015
To improve the performance of TDMA Network, we propose a new slot allocation algorithm called Traffic Characteristics-Hybrid Time Division Multiple Access (TC-HTDMA). In this method, we add dynamic slot reservation (DSR) mechanism to traditional static slot assignment and take node priority into consideration. In the DSR mechanism, each node employs ARMA prediction method to compute the slot number that it will need in the next frame stage, then, sends the value to the Virtual Network Controller (VNC) which will execute the slots assignment algorithm by summarizing all nodes’ requirements and priority levels and give the final slot allocation scheme. Furthermore, we verify the effectiveness of the proposed algorithm through computer simulation using OPNET and compare the results with another hybrid slot allocation method MOHSAP. The results show that TC-HTDMA performs better than MOHSAP in terms of slot utilization, throughput and end to end delay, guarantees the quality of service (QoS) of different traffic, and realizes rational allocation of network bandwidth resources.