阅读说明：本技术 一种多模无线通信终端及其通信方法 (Multi-mode wireless communication terminal and communication method thereof ) 是由 王林波 杨凤生 曾惜 王元峰 王冕 王恩伟 李倩 王鲁平 杨金铎 刘畅 王宏远 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种多模无线通信终端及其通信方法,包括中央处理单元MCU、GPS定位模块、无线通讯集成模块和传感器,GPS定位模块、无线通讯集成模块和传感器均连接到中央处理单元MCU,无线通讯集成模块设置有NB-IoT模块、LoRa模块和4G模块,传感器用于采集线路信息。本发明的通信方法中设定的权值算法所得出的阈值来确定对采集终端通信方式的选择,以适应不同通讯环境和数据的重要性等条件下顺利终端数据的传输,实现通信综合效果的最优化、配电网监控系统的稳定实时监测。(The invention discloses a multimode wireless communication terminal and a communication method thereof, and the multimode wireless communication terminal comprises a central processing unit (MCU), a Global Positioning System (GPS) positioning module, a wireless communication integrated module and a sensor, wherein the GPS positioning module, the wireless communication integrated module and the sensor are all connected to the MCU, the wireless communication integrated module is provided with an NB-IoT module, a LoRa module and a 4G module, and the sensor is used for acquiring line information. The selection of the communication mode of the acquisition terminal is determined by the threshold obtained by the weight algorithm set in the communication method, so that the method is suitable for smooth transmission of terminal data under the conditions of different communication environments, data importance and the like, and the optimization of the comprehensive communication effect and the stable real-time monitoring of a power distribution network monitoring system are realized.)

1. A multimode wireless communication terminal, characterized by: including central processing unit MCU, GPS orientation module, wireless communication integrated module and sensor all are connected to central processing unit MCU, and wireless communication integrated module is provided with NB-IoT module, loRa module and 4G module, and the sensor is used for gathering circuit information.

2. The communication method of a multimode wireless communication terminal according to claim 1, characterized in that: the method comprises the following steps: diagnosing the communication environment of the acquisition terminal according to the environment quantity parameters acquired by the terminal and the terminal communication signal intensity through the MCU to acquire a communication environment coefficient Z₁collecting the transmitting power P of the terminal_BNoise variance R_iTransmission power P of the master station_uAccording to the channel coefficient h of the base station and the terminal_iand the channel coefficient g of the master station and the terminal_iobtaining a communication environment factor K through weighting factor operation₁(ii) a The data importance coefficient Z is obtained by the diagnosis of the data importance of the acquisition terminal by the MCU₂Channel coefficient h of base station and terminal_iChannel coefficient g of master station and terminal_ito obtain the data importance factor K₂(ii) a Then, according to three different communication modes, the requirements for various communications are different, and the factor K for the communication environment is₁And a data importance factor K₂By multiplying by a corresponding demand coefficient K_dnThen, the final communication mode threshold Q is obtained by superposition_sThreshold value Q_sThe range is 0-1, the threshold range is divided into 3 intervals which are respectively 0-0.3, 0.3-0.7 and 0.7-1, the three threshold intervals correspond to a LoRa module, an NB-IoT module and a 4G module, and the central processing unit MCU detects a threshold Q_sAnd selecting the corresponding communication module to communicate when the data falls into the corresponding interval, and finally finishing the data transmission.

3. The communication method of a multimode wireless communication terminal according to claim 1, characterized in that: communication environment factor K₁The calculation formula is as follows:

4. According tothe method of claim 1, further comprising the step of: data importance factor K₂The calculation formula is as follows:

K₂＝Z₂×arg max{|h_i|²，a×|g_i|²} (2)

In the formula, a represents the total number of channels between the terminal and the master station.

5. The communication method of a multimode wireless communication terminal according to claim 1, characterized in that: communication mode threshold Q_sThe calculation formula is as follows:

Q_S＝K_d1×K₁+K_d2×K₂ (3)

In the formula K_d1And K_d2Respectively taking 0.5.

Technical Field

The invention relates to a multimode wireless communication terminal and a communication method thereof, belonging to the technical field of multimode wireless communication terminals.

Background

The power distribution network information acquisition system is an important component of the intelligent power grid and is important content for realizing power grid construction. The power distribution network information acquisition system mainly comprises a client, a power utilization information acquisition system, a communication channel, an intelligent terminal and a power utilization field. However, as the most important power communication intelligent terminal in the power distribution network information acquisition system, due to the problems of single access network, network coverage, network reliability and the like, the power communication terminal has certain limitations.

The power distribution system is huge, the power distribution line is long, the communication environments of all line segments are different, the acquisition units have different requirements on power consumption due to the fact that the acquisition units have different requirements on the communication selection mode of the power consumption information acquisition system. It is a very big task if the situation of each line section is examined.

For sudden situations (e.g. stormy weather), the requirements on the communication means are also different. In the monitoring of overhead line, monitoring devices adopts 4G communication mode more, and under normal condition, 4G communication has that transmission rate is fast, coverage is wide, advantage such as intelligent performance height, but under the bad weather conditions such as torrential rain, the effect of 4G communication is relatively poor, leads to unable message sending very probably, and the system loses the control to monitoring terminal. If a fault occurs at this time, the fault information cannot be smoothly transmitted to the monitoring master station, which results in unpredictable results. In addition, the energy consumption of 4G communication is relatively serious, which increases the workload of maintenance personnel, but actually, for some non-emergency data transmission with low capacity, 2G and 3G communication can be adopted to meet the transmission requirement.

In the modern era of high-speed development of digital communication, the requirements for communication personalization and intellectualization are increasing, different wireless communication technologies have advantages and disadvantages and have larger standard differences, and meanwhile, the existing communication terminal has single functions and cannot meet the requirements of various professional fields on higher and higher communication functions, so that the multimode communication which can integrate the advantages of various different communication standards is a necessary development trend.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a multimode wireless communication terminal and a communication method thereof are provided to solve the problems in the prior art.

the technical scheme adopted by the invention is as follows: a multimode wireless communication terminal comprises a central processing unit (MCU), a GPS positioning module, a wireless communication integrated module and a sensor, wherein the GPS positioning module, the wireless communication integrated module and the sensor are all connected to the MCU, the wireless communication integrated module is provided with an NB-IoT module, a LoRa module and a 4G module, and the sensor is used for collecting line information (specifically including which information how to utilize subsequent communication environment diagnosis or data importance diagnosis).

A communication method of a multimode wireless communication terminal is provided, which comprises the following steps: diagnosing the communication environment of the acquisition terminal according to the environment quantity parameters acquired by the terminal and the terminal communication signal intensity through the MCU to acquire a communication environment coefficient Z₁Collecting the transmitting power P of the terminal_BNoise variance R_itransmission power P of the master station_uAccording to the channel coefficient h of the base station and the terminal_iand the channel coefficient g of the master station and the terminal_i(default to 1 in ideal state), and obtaining the communication environment factor K through weighting factor operation₁(ii) a The data importance coefficient Z is obtained by the diagnosis of the data importance of the acquisition terminal by the MCU₂Channel coefficient h of base station and terminal_iChannel coefficient g of master station and terminal_i(default ideal state is 1), and a data importance factor K is obtained₂(ii) a Then according toThe three different communication modes have different requirements on various communications and have different communication environment factors K₁And a data importance factor K₂By multiplying by a corresponding demand coefficient K_dnThen, the final communication mode threshold Q is obtained by superposition_sThreshold value Q_sThe range is 0-1, the threshold range is divided into 3 intervals which are respectively 0-0.3, 0.3-0.7 and 0.7-1, the three threshold intervals correspond to a LoRa module, an NB-IoT module and a 4G module, and the central processing unit MCU detects a threshold Q_sAnd selecting the corresponding communication module to communicate when the data falls into the corresponding interval, and finally finishing the data transmission.

Communication environment factor K₁the calculation formula is as follows:

data importance factor K₂the calculation formula is as follows:

K₂＝Z₂×arg max{|h_i|²，a×|g_i|²} (2)

In the formula, a represents the total number of channels between the terminal and the master station.

Communication mode threshold Q_sThe calculation formula is as follows:

Q_S＝K_d1×K₁+K_d2×K₂ (3)

In the formula K_d1And K_d2Respectively taking 0.5.

The invention has the beneficial effects that: compared with the prior art, the selection of the acquisition terminal communication mode is determined by the threshold obtained by the weight algorithm set in the communication method, so that the smooth terminal data transmission under the conditions of different communication environments, data importance and the like is adapted, the optimization of the comprehensive communication effect and the stable real-time monitoring of the power distribution network monitoring system are realized.

Drawings

FIG. 1 is a flow chart of a communication scheme of the present invention;

Fig. 2 is a schematic diagram of the principle of the present invention.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.