An intelligent mobile communication method based on rail transit wireless environment map
A wireless environment map and rail transit technology, applied in wireless communication, baseband system components, electrical components, etc., can solve handover failure, difficult channel estimation, Doppler spectrum expansion compensation, communication quality user experience can not be guaranteed, etc. problem, achieve the effect of reducing energy consumption, improving communication quality and reliability
Inactive Publication Date: 2017-07-21
BEIJING JIAOTONG UNIV
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Problems solved by technology
At present, the existing high-speed rail or subway public mobile communication services basically continue to use the existing land public cellular mobile communication system, without considering the particularity of the rail transit wireless communication environment, so there are many shortcomings, such as: it is difficult to quickly and accurately carry out Channel estimation, Doppler spectrum spread compensation; communication link interruption, link performance (bit error rate, packet loss rate) deterioration or Handover fails. In short, the communication quality (or user experience) of the existing mobile communication system in the rail transit environment is not yet guaranteed and needs to be improved urgently
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[0020] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0021] The specific method steps of the present invention are as follows.
[0022] 1. Construct a suitable rail transit wireless environment map
[0023] The concept of "Radio Environment Map" ("REM") was first proposed by the patent applicant (Zhao Youping) and others in 2006. The wireless environment map is a digital abstraction of the complex wireless environment, directly reflecting multi-dimensional wireless environment information (such as wireless channel parameters, wireless signal or interference time-space-frequ...
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The invention discloses an intelligent mobile communication method based on a rail transit wireless environment diagram. On the basis of repeatability of the movement rule of a train and predictability of wireless channels along the line of rails, the rail transit wireless mobile communication method which is novel and has the wireless environment cognition capacity is provided. By means of the rail transit wireless environment diagram, the wireless channels and even the scene where the wireless channels are located can be perceived or predicted more accurately and comprehensively, channel estimating accuracy is improved, channel estimating complexity is reduced, the rail transit wireless environment diagram can be constantly improved in the repeated running process of the train, and therefore the communication quality and the reliability of a wireless mobile communication system can be improved, and energy consumption of the communication system can be reduced.
Description
technical field [0001] The invention relates to the technical field of rail transit wireless mobile communication, in particular to an intelligent mobile communication method based on a rail transit wireless environment diagram. Background technique [0002] China already has the world's largest high-speed railway network with the highest operating speed, and the mileage of high-speed passenger dedicated lines and intercity railways under construction and soon to be constructed has reached 17,000 kilometers. At the same time, it is estimated that by 2015, China's urban rail transit lines will reach 87, and the total operating mileage will exceed 2,500 kilometers. In order to transmit rail transit safety control information (such as video surveillance) and various sensor information, as well as provide passengers with voice and data communication services, it is urgent to develop a broadband wireless communication system for rail transit, and finally realize the informatizati...
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IPC IPC(8): H04L25/02H04W24/02
Inventor 赵友平李金兴黄楠楠
Owner BEIJING JIAOTONG UNIV