Abstract
With the rapid popularization of PC and Internet in the home, and improvement
of the intelligentized degree of information household appliances, HomeNet,
especially simple, flexible and robust HomeNet is getting more and more attention.
As a short-range wireless communication technology, Bluetooth is one of the best
solution to low-rate wireless HomeNet connection.
Working at the opening 2.4GHz ISM band which is free to be accessed,
Bluetooth devices will be easily interfered with by other systems. To induce the RF
interference from other systems by the greatest degree, Bluetooth uses the fast
frequency hopping technology. The hop selection algorithm is introduced in this paper.
And to improve the performance of anti-interference, an improved adaptive frequency
hopping scheme is suggested on the basis of original algorithm. To compare the
anti-interference performance between the original and improved system, system
emulation and performance analysis is implemented by using C language and Matlab.
The result of emulation and analysis shows that the improved scheme put forward by
the paper greatly enhances the system’s anti-interference performance.
The other part of this paper discusses the research and realization of the
Bluetooth-based HomeNet, including how to realize long-distance control to the
information household appliances through Internet, and how the PC or portable
computer in the HomeNet accesses Internet through Bluetooth gateway. The
realization of Bluetooth gateway is emphasized. Commencing on the Bluetooth
application profile – LAN Access Profile, the paper discusses until the implement of
Bluetooth protocols and high layer Bluetooth application programming to the final
realization of LAN Access Profile in detail.
Keywords: Bluetooth, HomeNet, Bluetooth gateway, LAN Access, hopping algorithm,
adaptive.
