| The modern communications technology tends to grouping of key network technology and wareless of narrowband access technology. The motion terminal can access to the other equipment in the LAN, and access to resource by the Router and gateway in Internet. So the most important technology that the motion terminal in WLAN can move indeed depends on the wareless access controller system, and this system is composed of the embedded technology which implements the complicated function and the corresponding wareless technology . In the face of the increasing embedded Linux market foreground, the system developer have to make a definite choice on all Linux key technologise.Because it's excellent kernel design and application performance,Linux is running on many kinds of hardware. Linux also owns other merits such as its free source code, its inherit network functions and its modularization design in kernel. Therefore Linux is very suitable to be the operate system of embedded system. uClinux is a branch of embedded Linux. And it is designed for NO-MMU CUP. Aiming at the stone's throw wareless comnunications equipment fixible removal, low consumpion and low radialiazation etc characteristics, the wareless access controller adopts the embedded Linux technology and the Bluetooth technology and impliments the function that the wareless equipments communicate with each other in WLAN and Internet . This paper introduces the Bluetooth protocol stack structure ,the each function and the key protocol performing process;and recommands the correspnding embedded Linux. Above all ,the developping platform aiming at the wareless access controller is builded by transplanting the uClinux system to the EV44B0 developping board, then the Bluetooth communications is realiazed. This paper brings forward the ideas on designing the system hardware and software,and the structure of the hardware and software; particularly expatiates the study and impliment of the improved function modules.
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