Device for detecting a signal in a wireless LAN

A device for detecting a signal of a wireless local area network comprising a portable entity for being taken by a user to find a strength of the signal at a point in the wireless local area network; a wireless transceiver located in the portable entity for receiving the signal; a controller located in the portable entity and electrically connected to the wireless transceiver for processing the signal and producing a result; and a controllable panel located on the portable entity and electrically connected to the controller for displaying a message about a distribution status of the signal to the user according the result.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Please refer to FIG. 2 showing the system schematic diagram which includes the portable entity 20 , the wireless RF transceiver 21 , the microprocessor having the CPU 22 and memories 26 , and the touch-controllable LCD panel 25 which is electrically connected to the CPU 22 by the input/output (I/O) interface. The I/O interface 23 may be RJ45, RS-232 or USB. The portable entity 20 may connnect to a computer through the connector of RJ45, RS-232 or USB. A user can take the portable entity 20 around a room or a office for detecting the wireless signal strength of a wireless LAN. The wireless RF transceiver 21 is allocated in the portable entity for transmitting and receiving the wireless signal. The CPU 22 and memories 26 is allocated in the portable entity and electrically connected to the wireless RF transceiver 21 for processing the signal and producing a result to display on the touch-controllable LCD panel 25 . The user can judge the signal distribution status from the message displayed on the touch-controllable LCD panel 25 . A wireless LAN may include several hosts. A host may be as a AP so each host can also communicate each other by the wireless method. In the present invention, the portable entity is of palm type. The use can put on the palm to look or detect the wireless signal strength everywhere. Please refer to FIG. 3 showing the wireless signal detection device 31 can be easily take to detect the wireless signal distribution status around a room or a office. It is implemented as the palm type, or can be combined into a PDA (person digital assistant). The noise source 32 in the corner can be found when the detection range 311 of the wireless signal detection device 31 is closed. The noise 321 propagating from the noise source 32 will be detected by the wireless signal detection device 31 . This means that a shielding is required to isolate the noise from a wireless LAN. Please refer to FIG. 4 showing the wireless signal detection. The wireless signal detection device 31 can detect the signal strength, the address of an AP 41 , and the data rate. Additionally, it can also detect how many APs are linked under the position of itself, and accordingly, the communication channel of each AP may be adjust suitably. For example, under the position A, the detection device 31 can find one AP 41 ; under the position B, it can find two APs 41 ; and under the position C, it can find three Aps 41 . The position of each AP 41 may be moved or a new AP may be increased where the wireless signal is not reachable. The detection device can detect the communication quality and wireless signal distribution status of the wireless LAN, so the troubles in the allocation and construction can be easily shot. While the invention has been described in terms of what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.