Distributed antenna transmission mode selection and power optimization method in high-speed rail scenarios

A distributed antenna and transmission mode technology, applied in radio transmission systems, diversity/multi-antenna systems, power management, etc., can solve problems such as not optimizing system energy efficiency and not taking time fairness into consideration

Active Publication Date: 2020-12-29
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Its shortcoming is that it does not take into account the issue of time fairness
But the same, its shortcoming is that it does not optimize the energy efficiency of the system

Method used

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  • Distributed antenna transmission mode selection and power optimization method in high-speed rail scenarios
  • Distributed antenna transmission mode selection and power optimization method in high-speed rail scenarios
  • Distributed antenna transmission mode selection and power optimization method in high-speed rail scenarios

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Embodiment Construction

[0077] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection authority of the present invention is not limited to the following the described embodiment.

[0078] In order to avoid large penetration loss, the two-hop transmission structure adopted by the high-speed rail communication system is as follows: figure 1 As shown, the RAUs at the transmitting end are distributed at equal intervals. The train has 8 cars in total, and a mobile relay (Mobile Relay, MR) is installed in the head car and the tail car. Since the relative mobility between the mobile relay and the users inside the carriage is very low and the communication transmission quality is high during the running of the train, the present invention o...

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Abstract

The invention discloses a distributed antenna transmission mode selection and power optimization method in a high-speed rail scene. The distributed antenna transmission mode selection and power optimization method comprises the following steps: S1, initializing a transmitting end power distribution strategy; S2, acquiring channel information by using train position information; S3, performing selective operation according to the judgment condition, and when and only when the judgment condition is met, optimizing the system energy efficiency; S4, solving the optimization problem according to aLagrangian multiplier method, and obtaining the relationship between the system transmitting power and the Lagrangian multiplier in multiple transmission modes at each moment; And S5, determining thetransmission mode at each moment and maximizing the system energy efficiency. According to the method, the limitation and delay constraint of the transmitting power of the system are met, the minimumspeed requirement of the train at each moment is ensured, the energy efficiency of the system is maximized, and the method has very high use and popularization values.

Description

technical field [0001] The invention relates to a high-speed rail wireless mobile communication technology method, in particular to a distributed antenna transmission mode selection and power optimization method for improving system energy efficiency based on location information in a high-speed rail scene, and belongs to the field of wireless communication technology. Background technique [0002] In recent years, my country's high-speed railway technology has developed rapidly. With the rapid increase in the number of mobile users and the rapid popularization of smart terminals, the demand for wireless data services of passengers has also greatly increased, which has exposed the problem of low energy efficiency in the current high-speed rail communication network. In such a background, how to improve the energy efficiency of the communication network has become an urgent problem to be solved in the research of the new generation of railway wireless communication. [0003]...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0426H04B7/06H04W52/28
Inventor 徐友云胡金玲王小明李大鹏
Owner NANJING UNIV OF POSTS & TELECOMM
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