Throughput and Delay Analysis for Full-Duplex WLANs with Frame Aggregation under Non-saturated Condition

Wireless full-duplex (FD) communication allows a node to send and receive data frames simultaneously within the same frequency channel. Generally, FD transmission is effective when a pair of FD transmission nodes have the same data-transmission duration. The difference in the time duration of the frames transmitted by a pair of the nodes wastes the channel resources where more data could be transmitted. The wasted time duration decreases the system throughput in networks. To adjust the data-frame transmission duration in a pair of FD nodes, previous work has proposed the application of frame aggregation technique to FD communication. However, the work has assumed the network is in saturated condition where each node has enough number of data-frames in its queue. In real networks, each node does not always have enough data frames. For applying the frame aggregation to FD networks, therefore, it is necessary to consider the networks under non-saturated condition. This paper proposes throughput and delay analysis for FD WLANs with frame aggregation. As the contributions, this paper provides the analytical expressions of FD networks under non-saturated condition. From the proposed model, the appropriate aggregation size for both the network throughput and the delay can be derived for each offered load, packet payload size, and the number of nodes in the networks.