The paper presents a design of ZigBee-WiFi gateway. The gateway is designed through System on Programmable Chip (SOPC). The embedded platform is built through the digital logical gates resources in the Field-Programming Gate Array (FPGA) and the bottom software package of developing application programs. The design is implemented with the MicroBlaze embedded soft core processor. The test results show that data forwarding function is normal with the use of ZigBee-WiFi gate and the design has high application promotion value in intelligent home system.

Design of ZigBee-WiFi Gateway Based on MicroBlaze

To achieve efficient economy energy in the wireless sensor network,a novel ZigBee-WiFi cooprative synchronise power saving scheme was presented.ZigBee wireless sensor node sensed the periodical beacon frame of WiFi which worked in the same radio spectrum through the built-in receive signal strength register(RSSI),and used it as a reference clock to adjust the local clock.However,the clock deviation was larger while using this method.A clock model based on the state space was proposed then,Kalman filter and DLQR regulator were adopted to trace and regulate the state variable.Finally,the trade-off between the clock synchronization error and correction cycle was analyzed.Considering comprehensive factors,compared with the asynchronous clock mechanism commonly used in industry,the results show that the energy-saving effect of ZigBee network is significantly improved using the proposed clock synchronization mechanism.

Dong Zh

Papers

Energy-saving technology of ZigBee-WiFi cooperative wireless sensor networks