Table 10.

The comparison between KJ280, KJ272 and MPPS positioning system.

System	KJ280	KJ272	MPPS
Architecture	Fieldbus architecture	Clustering structure	Clustering-Fieldbus hybrid hierarchical architecture with blind areas
Function	Location registration, Location query	Location registration, Location query	Location registration, Integrated information query, Location prediction
Positioning method	Radio Frequency Identification Technology	Received signal strength indication–based location method	Four-step global positioning method: the local positioning, the simple filtering, the three-dimensional algorithm and the estimation algorithm in blind area
Precision	Regional Location	≤ ±15 meters	≤ ±3.0 meters (positioning areas); ≤ ±4.5 meters (blind areas)
Cost	High	High	Low
Reliability	Medium	Low	High
Power	Mains supply	Batteries	Mains supply and batteries
Maintainability	Senior RFID reader is complex and expensive, complex maintenance	Arrange a large number of routing nodes to maintain the wireless connectivity, complex maintenance	Measuring nodes decreased greatly due to the blind areas, easy maintenance