Wireless communication system and wireless tunnel controlling method
A control method and technology of wireless channels, applied in wireless communication, communication between multiple stations, radio/induction link selection and arrangement, etc., can solve the problems of communication quality deterioration, inability to provide services, etc. The effect of improving user convenience and suppressing the increase in base station load
Active Publication Date: 2008-07-23
FIPA FROHWITTER INTPROP AG
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[0007] On the other hand, depending on the state of radio wave propagation, there are cases where communication quality deteriorates significantly and channel switching is necessary, and it may not be possible to provide appropriate services only by raising the standard for channel switching
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[0051] Measure the level of the electric wave and the error rate (Frame Error Rate: hereinafter referred to as FER) of the transmitted frame at the base station as the state of electric wave propagation, and switch the channel according to the value of the level and FER and its duration (in the following description and accompanying drawings The implementation / non-execution of handover (also described as Tch handover in the following description and drawings) or handover (also described as H.0 in the following description and drawings) is finely controlled. Embodiments of the wireless communication system and the wireless channel control method of the present invention will be described in detail below using the drawings.
[0052] FIG. 1 is a network configuration diagram showing the configuration of a wireless communication system.
[0053] The wireless communication system 10 includes a plurality of terminals (PS) 140, a plurality of base stations (CS) 130 having a radio wav...
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PROBLEM TO BE SOLVED: To control switching of channels, in response to a condition of electric wave propagation which changes abruptly in a short time. ŽSOLUTION: A control device 260 obtains a receive level and a frame error rate (FER) for each prescribed time or each prescribed number of frames, on the basis of a receive level measuring unit 241 and a frame error monitoring unit 242. In the control unit 240, a first rate threshold and a second rate threshold sought for compensating communication quality are compared with FER respectively, and also the receive level and a level threshold sought for compensating communication quality are compensated. The control unit 240 adds prescribed counter values according to the compared result. The control unit 240 compares each counter value respectively with first to fourth consecutive number-of-times thresholds, sought for preventing channel switch under abruptly short-time changing conditions. When one of counter values exceeds the corresponding consecutive number-of-times threshold, the control unit 240 performs channel switching and the like. Ž
Description
technical field [0001] The present invention relates to a wireless communication system and a wireless channel control method, in particular to the structure of a wireless communication system utilizing time division multiple access and the wireless channel control method of the system. Background technique [0002] Wireless communication systems of various configurations have been introduced in the field of wireless communication. Among them, the personal handyphone system (Personal Handyphone System: hereinafter referred to as PHS) uses Time Division Multiple Access (Time Division Multiple Access: hereinafter referred to as TDMA) technology to perform time division multiplexing of multiple channels in a predetermined frame. The wireless communication system for multiplexed transmission and reception of information is a widely used wireless communication system whose detailed structure and operation are stipulated in the "RCR STD-28" standard by the Association of Radio Ind...
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IPC IPC(8): H04Q7/38H04B7/26H04W36/24
Inventor 笹山司高谷健次郎佐藤博文铃木拓马
Owner FIPA FROHWITTER INTPROP AG