ABSTRACT
Networks .............................................................................258 9.3 Challenges to Guarantee QoS in Wireless Sensor Networks ...........259
9.3.1 Challenges in Wireless Sensor Networks .............................259 9.3.2 Architecture of the System and Design Issues .................... 260
9.3.2.1 Sensor Network Scenarios .................................. 260 9.3.2.2 Node Deployment ...............................................263 9.3.2.3 Sending Models toward the Sink .........................263
