Implementation of asymmetry data transmission channels in a cascaded network based on Ethernet PHY
MA Yi-chao · Journal of Jilin University · 2011
In cascaded sensor network, data transmission channels of the uplink and downlink are usually asymmetric in data rate. According to this feature, an improved cascaded usage of Ethernet PHY chip was presented. In the uplink channel with higher data rate the Ethernet PHY chip was used as an independent receiver and transmitter; thus, one PHY chip can receive data from downlink node and transmit data to uplink node. The downlink channel with lower data rate was implanted with transceivers which have lower power consumption and lower cost. A Field Programmable Gate Array (FPGA) was used to implement the data link layer of the network. Experiment results show that the in practical application this design can satisfy the trade-off between low power consumption and high data rate.