Cellular network unidirectional switching method with self-adapting switching threshold
An adaptive switching and threshold technology, applied in wireless communication, electrical components, etc., can solve the problems of too late switching, too fast, call interruption, etc., to reduce the increase or decrease of the number of switching, improve the success rate of switching, and reduce interruption. effect of probability
Active Publication Date: 2015-05-20
HUAZHONG UNIV OF SCI & TECH
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[0005] The present invention provides a cellular network one-way switching method with an adaptive switching threshold value, which solves the problem of call interruption caused by too fast switching when the existing switching method is applied to a high-speed train scene
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] Such as figure 1 The shown base stations are arranged linearly along one side of the rail, and the overlapping area covered by adjacent base stations is the area where handover is performed. Such as figure 2 The overlapping area shown can be divided into M decision points. There are N measurement points between every two decision points.
[0026] In the present invention, it is characterized in that the forward handover threshold and the backward handover threshold are different, and the forward handover threshold is smaller than the backward handover threshold, which encourages users to handover towards the target base station. At the same time, the forward threshold is getting lower and lower. When it is close to the source base station, it can avoid premature handover and cause the ping-pong effect. When it is close to the target base stat...
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The invention discloses a cellular network unidirectional switching method with a self-adapting switching threshold and belongs to the field of cell switching of wireless communication. The cellular network unidirectional switching method comprises three steps of signal measurement, trigger switching and switching execution, wherein the signal measurement step comprises the step of acquiring signal intensity received from a source base station and a target base station, the trigger switching step comprises the step of performing triggering switching according to the signal intensity by adopting a self-adapting switching threshold unidirectional strategy, and the switching execution step comprises the step of switching corresponding service stations according to trigger results. According to the cellular network unidirectional switching method with the self-adapting switching threshold, the outage probability of a user is reduced when the switching frequency is reduced, and the problem of the dropped call caused by untimely switching due to too fast speed when the existing switching method is applied to a high speed train scene is solved.
Description
technical field [0001] The invention belongs to the field of wireless mobile communication under the high-speed railway environment, and in particular relates to a one-way switching method with an adaptive switching threshold, which is applicable to a single base station coverage scene under the viaduct environment in the high-speed railway. Background technique [0002] With the rapid development of China's high-speed rail network, the speed of trains is gradually increasing, and more and more people will travel by high-speed rail. At the same time, on the other hand, the popularization of mobile phones and various mobile terminals requires a wireless network with wider coverage, including of course providing reliable communication services on trains. The high-speed operation of the train will bring great challenges to the communication of mobile users on the train, especially the handover between cells has a great impact on system performance. Therefore, it is necessary t...
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IPC IPC(8): H04W36/00H04W36/08
Inventor 葛晓虎吴泽世韩涛张靖潘胜杨曦
Owner HUAZHONG UNIV OF SCI & TECH