Wireless Sensor Network for Aircraft Health Monitoring
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
Avoiding the Bottlenecks in the MAC Layer in 802.15.4 Low Rate WPAN
ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Workshops - Volume 02
Energy and delay optimized contention for wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Adaptive approaches to relieving broadcast storms in a wireless multihop mobile ad hoc network
IEEE Transactions on Computers
| Hi-index | 0.00 |
In IEEE 802.15.4 wireless personal area networks (WPANs), the reliable data transmission is one of important issues such as the body information for medical treatments. Some handshaking mechanisms in literatures were studied and proposed to guarantee successful frame transmission. One of handshaking mechanisms adopts ACK frame, which is replied by the receiver back to the sender when the data frame is correctly received. This is a popular mechanism. However, there are many different reasons causing data frames which cannot be correctly received on the receiver such as the fading channel, data frame collision and hidden terminal problem and so on. Therefore, a sender should have different data retransmission policies and procedures. Neglecting these reasons of failed transmission, the retransmission frame may fail again, and the transmission efficiency will be degraded. In this paper, we propose a cross-layer judgment scheme to solve the retransmission problem. It does not require the cost of extra control overhead, but it can judge correctly the reasons of failed transmission from overlapped signals. Thus, the sender can adjust adaptive system parameters to handle the retransmission procedure. Simulation results demonstrate that the proposed scheme can effectively improve the transmission efficiency.