Wireless device and its electric field grade threshold setting method
A level threshold, wireless device technology, applied in wireless communication, electrical components, transmission monitoring and other directions, can solve the problems of low carrier to interference wave ratio, undisclosed electric field level threshold determination method, and immature technology.
Inactive Publication Date: 2006-09-06
KYOCERA CORP
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[0003] However, the above-mentioned prior art does not disclose a specific method for determining the threshold value of the electric field level, and there is a problem that the technology is not yet mature enough to efficiently determine a signal with a higher electric field level.
However, during the repetition period of the two downlink control signals (31), (32), the CIR (Carrier to Interference Ratio: Carrier-to-Interference Ratio) is low, and the synchronization of the downlink control signal (32) that should receive a higher electric field level is used. Established actions may fail
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[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0028] figure 1 It is a block diagram showing the configuration of the reception system of the wireless mobile station 10 in one embodiment of the present invention. figure 1 The shown wireless mobile station (hereinafter, simply referred to as "mobile station") 10 is figure 2 The mobile station of the TDMA mobile communication system shown receives signals from a plurality of wireless base stations 11-1, 2, 3, 4, . . . Downlink control signals are selected from among these downlink control signals, and a signal with a high receiving electric field level is selected to perform a synchronization establishment operation, and receive control information from a wireless base station.
[0029] image 3 A configuration example of a downlink control signal is shown in . image 3 The shown downlink control signal is composed of a bit synchronization signal 21, a frame sy...
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PROBLEM TO BE SOLVED: To efficiently select a signal high in received electric field level from among down-link control signals from a plurality of wireless base stations by determination of a threshold. ŽSOLUTION: The wireless device is provided with an electric field level detector 2 for detecting the received electric filed level of a received signal received by radio, an electric filed level threshold determination part 3 for determining the detected received electric field level with an electric field level threshold, a demodulator 5 for executing demodulation processing using the received signal corresponding to the determination result of the threshold; and an electric field level threshold calculator 4 for calculating the electric field level threshold on the basis of the detected received electric field level, and for updating the electric filed level threshold used by the electric field level threshold determination part 3. Ž
Description
technical field [0001] The present invention relates to a wireless device used in a mobile communication system such as a TDMA method and a method for setting an electric field level (level) threshold thereof. Background technique [0002] As one of the communication methods of the conventional mobile communication system, there is known a method in which the wireless section between the wireless base station and the wireless mobile station is constituted by a time-division multiplexed transmission path, and communication data such as control data and voice are exchanged. TDMA (Time Division Multiple Access: Time Division Multiple Access) mode. In the TDMA method, downlink control signals (control signals for wireless mobile stations) are transmitted from a plurality of wireless base stations through the same wireless channel at predetermined intervals, and each wireless mobile station receives downlink control signals from the plurality of wireless base stations through the...
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IPC IPC(8): H04B17/00H04B7/26H04W48/16
Inventor 松本宏规
Owner KYOCERA CORP