阅读说明：本技术 基于物联网的无线通信与无线充电的双向智能反射单元选择方法 (Bidirectional intelligent reflection unit selection method based on wireless communication and wireless charging of Internet of things ) 是由 赵娟 吴晓欢 朱卫平 于 2021-08-26 设计创作，主要内容包括：本发明提供一种基于物联网的无线通信与无线充电的双向智能反射单元选择方法,应用于物联网系统,物联网系统包括基站、用户和多个智能反射单元,基站、智能反射单元和用户以全双工模式在同一频段工作,双向选择控制器将考虑能量吸收情况下能量效率最大的智能反射单元作为选定的智能反射单元,基站与用户通过选定的智能反射单元协作通信；基站和用户同时向选定的智能反射单元发射信号,在信号到达智能反射单元上时进行相应的反射,反射后的信号到达对方节点,进而解码出所需要的信息,用户接收后将其中一部分能量分离存储用于下一次传输,另一部分能量用于译码；本发明能够显著提升物联网的无线通信性能,并提高物联网系统的无线充电性能。(The invention provides a wireless communication and wireless charging two-way intelligent reflection unit selection method based on the Internet of things, which is applied to an Internet of things system, wherein the Internet of things system comprises a base station, a user and a plurality of intelligent reflection units, the base station, the intelligent reflection units and the user work in the same frequency band in a full-duplex mode, a two-way selection controller takes the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit, and the base station and the user cooperatively communicate through the selected intelligent reflection unit; the base station and the user transmit signals to the selected intelligent reflection unit at the same time, corresponding reflection is carried out when the signals reach the intelligent reflection unit, the reflected signals reach the node of the other party, the needed information is decoded, and after the signals are received by the user, one part of energy is separated and stored for next transmission, and the other part of energy is used for decoding; the invention can obviously improve the wireless communication performance of the Internet of things and improve the wireless charging performance of the Internet of things system.)

1. The utility model provides a two-way intelligent reflection unit selection method of wireless communication and wireless charging based on thing networking, is applied to thing networking system, and thing networking system includes basic station, user and a plurality of intelligent reflection unit, its characterized in that: the base station, the intelligent reflection unit and the user work in the same frequency band in a full duplex mode, the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption is taken as a selected intelligent reflection unit by the bidirectional selection controller, and the base station and the user cooperatively communicate through the selected intelligent reflection unit; the base station and the user transmit signals to the selected intelligent reflection unit at the same time, corresponding reflection is carried out when the signals reach the intelligent reflection unit, the reflected signals reach the node of the other party, the needed information is decoded, and after the signals are received by the user, one part of energy is separated and stored for next transmission, and the other part of energy is used for decoding.

2. The internet of things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 1, characterized in that: comprises the following steps of (a) carrying out,

s1, the base station and the user jointly detect channel state information of each intelligent reflection unit, wherein the channel state information comprises a wireless channel coefficient from the base station to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the user, a wireless channel coefficient from the user to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the base station, transmission power of the base station, conversion efficiency of wireless energy collection of each intelligent reflection unit and conversion efficiency of wireless energy collection of the user;

s2, calculating the energy efficiency corresponding to each intelligent reflection unit when working independently under the condition of considering energy absorption according to the obtained channel state information;

s3, according to the calculation result, selecting the intelligent reflection unit with the maximum energy efficiency for transmission, and enabling other intelligent reflection units to sleep;

s4, the base station and the user send information to the selected intelligent reflection unit, and the intelligent reflection unit reflects the signal to the other side;

and S5, respectively decoding the received signals, and after receiving, the user stores a part of energy separately for the next transmission and uses the other part of energy for decoding.

3. The internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 2, characterized in that: in step S2, the energy efficiency corresponding to each intelligent reflection unit operating independently under the condition of energy absorption is calculated, specifically, the energy efficiency is the value obtained by dividing the sum of the data transmission rate of the wireless communication from the base station to the user through the intelligent reflection unit and the data transmission rate of the wireless communication from the user to the intelligent reflection unit to the base station by the transmission power of the base station.

4. A base as claimed in claim 3The method for selecting the wireless communication and wireless charging bidirectional intelligent reflection unit of the Internet of things is characterized in that: the data transmission rate from the base station to the user through the intelligent reflection unit is as follows:wherein p is_sIs the transmit power of the base station, h_1,kIs the radio channel coefficient from the base station to the kth intelligent reflection unit, g_1,kIs the radio channel coefficient of the kth intelligent reflection unit to the user,is the variance of the noise received by the user as a receiver;

5. the internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 3, wherein: the data transmission rate from the user to the base station through the intelligent reflection unit is as follows:wherein p is_uIs the transmitted power, h, obtained by the user through the wireless energy harvesting function_2,kIs the wireless channel coefficient from the user to the kth intelligent reflection unit, g_2,kIs the radio channel coefficient of the kth intelligent reflection unit to the base station,is the variance of the noise received by the base station as a receiver.

6. The internet of things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 1, characterized in that: the user does not have power supply, absorbs energy from the received electromagnetic waves, and converts and stores the energy for the next time slot to send energy.

7. The internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method as recited in any one of claims 1-6, wherein: the bidirectional selection controller comprises a communication module, a control module, an energy efficiency calculation module and a data storage module,

a communication module: finishing the signal processing of a transmitter of a base station, the signal processing of a transmitter of a user, the signal processing of a receiver of the base station and the signal processing of the receiver of the user;

a control module: controlling the time synchronization of the whole Internet of things system, taking the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit according to the calculation result of the energy efficiency calculation module, controlling the intelligent reflection unit to be in a working state, and closing all other intelligent reflection units;

an energy efficiency calculation module: calculating the integral energy efficiency of the base station and the user corresponding to each intelligent reflection unit according to a calculation formula;

a data storage module: the energy efficiency calculation method comprises the steps of storing energy efficiency numerical values corresponding to all intelligent reflection units from an energy efficiency calculation module, storing wireless channel coefficients from a base station to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to users, storing wireless channel coefficients from the users to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to the base station, storing transmitting power of the base station, storing conversion efficiency coefficients collected by wireless energy of all the intelligent reflection units, and storing conversion efficiency coefficients collected by the wireless energy of the users.

8. The internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 7, wherein: configuring a first wireless energy collection module at a user terminal, wherein the first wireless energy collection module: and storing the energy wirelessly collected by the user for wireless charging of the user.

9. The internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 7, wherein: the internet of things system further comprises a second wireless energy collection module, wherein the second wireless energy collection module: and storing the energy wirelessly collected by each intelligent reflection unit for wirelessly charging the selected intelligent reflection unit.

10. The internet-of-things-based wireless communication and wireless charging bidirectional intelligent reflecting unit selecting method according to claim 7, wherein: the bidirectional selection controller is arranged at the base station and the user terminal or is arranged independently.

Technical Field

The invention relates to a bidirectional intelligent reflecting unit selection method based on wireless communication and wireless charging of the Internet of things.

Background

When the existing internet of things is used, some nodes do not have continuous power supply capacity, and therefore power supply needs to be carried out through other modes, such as a mode of using a battery and the like, and the nodes need to be replaced regularly in the mode. In order to realize continuous power supply without depending on wired transmission media, wireless energy transmission technology has been greatly developed in recent years. Currently, wireless energy transmission is mainly achieved through three methods: electromagnetic induction, electromagnetic resonance, and electromagnetic radiation. The electromagnetic radiation type belongs to a far-field wireless energy transmission technology, and the transmission distance is the farthest and can reach thousands of meters. But the transmission efficiency is low and the point-to-point transmission requirements cannot be hindered.

For example, chinese patent CN201620368804.1 discloses a wireless charging device, a wireless communication device and a wireless communication system, wherein the wireless charging device supplies power to the wireless communication device by converting wireless radio frequency signals into electric energy. However, this patent does not disclose how to select a plurality of intelligent reflection units of the intelligent reflection surface to achieve high transmission efficiency when performing bidirectional wireless communication.

The above problems should be considered and solved in the wireless communication and wireless charging selection process of the internet of things.

Disclosure of Invention

The invention aims to provide a wireless communication and wireless charging bidirectional intelligent reflection unit selection method based on the Internet of things, which can improve the transmission capability of unit energy consumption in the wireless charging Internet of things, further ensure the efficient work of an Internet of things system, and solve the problems of low energy transmission capability in the Internet of things and difficulty in ensuring the efficient work in the prior art.

The technical solution of the invention is as follows:

a wireless communication and wireless charging bidirectional intelligent reflection unit selection method based on the Internet of things is applied to an Internet of things system, the Internet of things system comprises a base station, a user and a plurality of intelligent reflection units, the base station, the intelligent reflection units and the user work in the same frequency band in a full-duplex mode, a bidirectional selection controller takes the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit, and the base station and the user cooperatively communicate through the selected intelligent reflection unit; the base station and the user transmit signals to the selected intelligent reflection unit at the same time, corresponding reflection is carried out when the signals reach the intelligent reflection unit, the reflected signals reach the node of the other party, the needed information is decoded, and after the signals are received by the user, one part of energy is separated and stored for next transmission, and the other part of energy is used for decoding.

Further, the method comprises the following steps of,

s1, the base station and the user jointly detect channel state information of each intelligent reflection unit, wherein the channel state information comprises a wireless channel coefficient from the base station to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the user, a wireless channel coefficient from the user to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the base station, transmission power of the base station, conversion efficiency of wireless energy collection of each intelligent reflection unit and conversion efficiency of wireless energy collection of the user;

s2, calculating the energy efficiency corresponding to each intelligent reflection unit when working independently under the condition of considering energy absorption according to the obtained channel state information;

s3, according to the calculation result, selecting the intelligent reflection unit with the maximum energy efficiency for transmission, and enabling other intelligent reflection units to sleep;

s4, the base station and the user send information to the selected intelligent reflection unit, and the intelligent reflection unit reflects the signal to the other side;

and S5, respectively decoding the received signals, and after receiving, the user stores a part of energy separately for the next transmission and uses the other part of energy for decoding.

Further, in step S2, the energy efficiency corresponding to each intelligent reflection unit operating independently considering the energy absorption is calculated, specifically, the energy efficiency is calculated by dividing the sum of the data transmission rate of the wireless communication from the base station to the user through the intelligent reflection unit and the data transmission rate of the wireless communication from the user to the intelligent reflection unit to the base station by the transmission power of the base station.

Further, the data transmission rate from the base station to the user through the intelligent reflection unit is as follows:wherein p is_sIs the transmit power of the base station, h_1,kIs the radio channel coefficient from the base station to the kth intelligent reflection unit, g_1,kIs the radio channel coefficient of the kth intelligent reflection unit to the user,is the variance of the noise received by the user as a receiver;

further, the data transmission rate from the user to the base station through the intelligent reflection unit is as follows:wherein p is_uIs the transmitted power, h, obtained by the user through the wireless energy harvesting function_2,kIs the wireless channel coefficient from the user to the kth intelligent reflection unit, g_2,kIs the radio channel coefficient of the kth intelligent reflection unit to the base station,is the variance of the noise received by the base station as a receiver.

Furthermore, the user does not have power supply, absorbs energy from the received electromagnetic waves, and converts the energy to be stored for the next time slot to send energy.

Further, the bidirectional selection controller comprises a communication module, a control module, an energy efficiency calculation module and a data storage module,

a communication module: finishing the signal processing of a transmitter of a base station, the signal processing of a transmitter of a user, the signal processing of a receiver of the base station and the signal processing of the receiver of the user;

a control module: controlling the time synchronization of the whole Internet of things system, taking the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit according to the calculation result of the energy efficiency calculation module, controlling the intelligent reflection unit to be in a working state, and closing all other intelligent reflection units;

an energy efficiency calculation module: calculating the integral energy efficiency of the base station and the user corresponding to each intelligent reflection unit according to a calculation formula;

a data storage module: the energy efficiency calculation method comprises the steps of storing energy efficiency numerical values corresponding to all intelligent reflection units from an energy efficiency calculation module, storing wireless channel coefficients from a base station to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to users, storing wireless channel coefficients from the users to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to the base station, storing transmitting power of the base station, storing conversion efficiency coefficients collected by wireless energy of all the intelligent reflection units, and storing conversion efficiency coefficients collected by the wireless energy of the users.

Further, configuring a first wireless energy collection module at the user terminal, wherein the first wireless energy collection module: and storing the energy wirelessly collected by the user for wireless charging of the user.

Further, the internet of things system further comprises a second wireless energy collection module, wherein the second wireless energy collection module: and storing the energy wirelessly collected by each intelligent reflection unit for wirelessly charging the selected intelligent reflection unit.

Further, the bidirectional selection controller is arranged at the base station, the user terminal or is arranged independently.

The invention has the beneficial effects that: according to the wireless communication and wireless charging bidirectional intelligent reflection unit selection method based on the Internet of things, one bidirectional intelligent reflection unit with the optimal energy efficiency is selected from the plurality of bidirectional intelligent reflection units, all other intelligent reflection units are closed, a user finishes energy collection by using a wireless charging technology through the selected bidirectional intelligent reflection unit, and meanwhile, the wireless information is sent and received, so that the wireless communication performance of the Internet of things can be remarkably improved, and the wireless charging performance of the Internet of things system is improved. The method can adapt to the scenes of the internet of things of wireless information transmission and wireless charging and is suitable for the scenes of a plurality of intelligent reflection units of bidirectional wireless information transmission.

Drawings

Fig. 1 is an explanatory diagram of an internet of things system in an embodiment of the present invention.

Fig. 2 is an explanatory diagram of the bidirectional selection controller in the embodiment.

Fig. 3 is a schematic flowchart of a bidirectional intelligent reflection unit selection method for wireless communication and wireless charging based on the internet of things according to an embodiment of the present invention.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Examples

A wireless communication and wireless charging bidirectional intelligent reflection unit selection method based on the Internet of things is applied to an Internet of things system, the Internet of things system comprises a base station, a user and a plurality of intelligent reflection units, the base station, the intelligent reflection units and the user work in the same frequency band in a full duplex mode, a bidirectional selection controller takes the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit, and the base station and the user cooperatively communicate through the selected intelligent reflection unit; the base station and the user transmit signals to the selected intelligent reflection unit at the same time, corresponding reflection is carried out when the signals reach the intelligent reflection unit, the reflected signals reach the node of the other party, the needed information is decoded, and after the signals are received by the user, one part of energy is separated and stored for next transmission, and the other part of energy is used for decoding.

According to the wireless communication and wireless charging bidirectional intelligent reflection unit selection method based on the Internet of things, one bidirectional intelligent reflection unit with the optimal energy efficiency is selected from the plurality of bidirectional intelligent reflection units, all other intelligent reflection units are closed, a user finishes energy collection by using a wireless charging technology through the selected bidirectional intelligent reflection unit, and meanwhile, the wireless information is sent and received, so that the wireless communication performance of the Internet of things can be remarkably improved, and the wireless charging performance of the Internet of things system is improved. The method can adapt to the scenes of the internet of things of wireless information transmission and wireless charging and is suitable for the scenes of a plurality of intelligent reflection units of bidirectional wireless information transmission.

The method for selecting the bidirectional intelligent reflecting unit based on the wireless communication and the wireless charging of the Internet of things as shown in figure 3 comprises the following steps,

s1, the base station and the user jointly detect channel state information of each intelligent reflection unit, wherein the channel state information comprises a wireless channel coefficient from the base station to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the user, a wireless channel coefficient from the user to each intelligent reflection unit, a wireless channel coefficient from each intelligent reflection unit to the base station, transmission power of the base station, conversion efficiency of wireless energy collection of each intelligent reflection unit and conversion efficiency of wireless energy collection of the user;

s2, calculating the energy efficiency corresponding to each intelligent reflection unit when working independently under the condition of considering energy absorption according to the obtained channel state information; specifically, the energy efficiency is a value obtained by dividing the sum of the data transmission rate of the wireless communication from the base station to the user via the intelligent reflection unit and the data transmission rate of the wireless communication from the user to the intelligent reflection unit to the base station by the transmission power of the base station.

In step S2, the data transmission rate from the base station to the user through the intelligent reflection unit is:wherein p is_sIs the transmit power of the base station, h_1,kIs the radio channel coefficient from the base station to the kth intelligent reflection unit, g_1,kIs the radio channel coefficient of the kth intelligent reflection unit to the user,is the variance of the noise received by the user as a receiver;

in step S2, the data transmission rate from the user to the base station via the intelligent reflection unit is:wherein p is_uIs the transmitted power, h, obtained by the user through the wireless energy harvesting function_2,kIs the wireless channel coefficient from the user to the kth intelligent reflection unit, g_2,kIs the radio channel coefficient of the kth intelligent reflection unit to the base station,is the variance of the noise received by the base station as a receiver.

S3, according to the calculation result, selecting the intelligent reflection unit with the maximum energy efficiency for transmission, and enabling other intelligent reflection units to sleep;

s4, the base station and the user send information to the selected intelligent reflection unit, and the intelligent reflection unit reflects the signal to the other side;

and S5, respectively decoding the received signals, and after receiving, the user stores a part of energy separately for the next transmission and uses the other part of energy for decoding.

In the embodiment, the user does not have power supply, absorbs energy from the received electromagnetic waves, and converts the energy stored for the next time slot to send energy. The method can improve the energy transmission capability, ensure high-efficiency work, effectively utilize radio waves to supply power for the user equipment, and simultaneously provide the capability of simultaneously transmitting information and energy.

As shown in fig. 2, the bidirectional selection controller includes a communication module, a control module, an energy efficiency calculation module and a data storage module,

a communication module: finishing the signal processing of a transmitter of a base station, the signal processing of a transmitter of a user, the signal processing of a receiver of the base station and the signal processing of the receiver of the user;

a control module: controlling the time synchronization of the whole Internet of things system, taking the intelligent reflection unit with the maximum energy efficiency under the condition of considering energy absorption as a selected intelligent reflection unit according to the calculation result of the energy efficiency calculation module, controlling the intelligent reflection unit to be in a working state, and closing all other intelligent reflection units;

an energy efficiency calculation module: calculating the integral energy efficiency of the base station and the user corresponding to each intelligent reflection unit according to a calculation formula;

a data storage module: the energy efficiency calculation method comprises the steps of storing energy efficiency numerical values corresponding to all intelligent reflection units from an energy efficiency calculation module, storing wireless channel coefficients from a base station to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to users, storing wireless channel coefficients from the users to all the intelligent reflection units, storing wireless channel coefficients from all the intelligent reflection units to the base station, storing transmitting power of the base station, storing conversion efficiency coefficients collected by wireless energy of all the intelligent reflection units, and storing conversion efficiency coefficients collected by the wireless energy of the users.

As shown in fig. 1, a first wireless energy collection module is configured at the user end, and the first wireless energy collection module: and storing the energy wirelessly collected by the user for wireless charging of the user. The first wireless energy collecting module is used for completing the wireless energy collection of the user by integrating the received wireless signals with respect to a time domain for the wireless charging of the user.

As shown in fig. 1, the internet of things system further includes a second wireless energy collection module, where the second wireless energy collection module: and storing the energy wirelessly collected by each intelligent reflection unit for wirelessly charging the selected intelligent reflection unit. The second wireless energy collection module collects the wirelessly collected energy of each intelligent reflection unit by integrating the wireless receiving signals in a time domain, and the second wireless energy collection module is used for wirelessly charging the selected intelligent reflection units.

The user side needs to be provided with a first wireless energy collection module, the intelligent reflection unit also needs to be provided with a second wireless energy collection module, and the selected intelligent reflection unit uses the second wireless energy collection module to wirelessly charge the intelligent reflection unit.

Fig. 2 is a schematic diagram illustrating a bidirectional selection controller, which uses a centralized central controller, and needs to acquire all relevant parameters, including wireless channel coefficients, conversion efficiency coefficients collected by wireless capabilities, etc., and then selects an intelligent reflection unit to participate in wireless communication and wireless information transmission, and the bidirectional selection controller can be placed at a user side, a base station, or a separate device, as shown in fig. 1.

The method for selecting the wireless communication and wireless charging bidirectional intelligent reflection unit based on the Internet of things has the advantages that firstly, the transmission capability of wireless communication in two directions is considered in the design process of the method for selecting the intelligent reflection unit, namely, the base station transmits the wireless transmission capability of a user through the intelligent reflection unit, the user transmits the wireless transmission capability of the base station through the intelligent reflection unit, and secondly, the selection target is that which intelligent reflection unit corresponds to the best performance (namely, the maximum energy efficiency function value) and then which intelligent reflection unit is selected. The two mechanisms ensure that the intelligent reflection unit for bidirectional wireless communication and bidirectional wireless charging is selected to obtain the best energy efficiency performance.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.