CN115396911A - Communication method, apparatus and storage medium - Google Patents

Communication method, apparatus and storage medium Download PDF

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Publication number
CN115396911A
CN115396911A CN202210998714.0A CN202210998714A CN115396911A CN 115396911 A CN115396911 A CN 115396911A CN 202210998714 A CN202210998714 A CN 202210998714A CN 115396911 A CN115396911 A CN 115396911A
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China
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base station
gain
output power
follow
distance
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CN202210998714.0A
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CN115396911B (en
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郭希蕊
张涛
王东洋
马艳君
李福昌
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18Network planning tools
    • H04W16/20Network planning tools for indoor coverage or short range network deployment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/52TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The communication method is applied to base station equipment in a communication system, and the communication system further comprises follow-up equipment which is used for providing network coverage for the elevator. The communication method comprises the following steps: the base station equipment determines the current output power of a wireless signal sent by the base station equipment to the slave equipment; under the condition that the current output power is equal to the preset maximum power, sending a gain indication to the follow-up equipment; the gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.

Description

Communication method, apparatus and storage medium
Technical Field
The present application relates to the field of communications, and in particular, to a communication method, device, and storage medium.
Background
With the explosive growth of mobile internet, internet of things and industrial application, higher requirements are put forward on the coverage of wireless signals. For coverage of a wireless network, indoor wireless signal coverage is shielded by a building, so that the wireless signal is weakened, stability of the wireless signal cannot be guaranteed, and particularly, shielding of the wireless signal in an elevator is serious.
Disclosure of Invention
The application provides a communication method, equipment and a storage medium, which provide stable network coverage for an elevator so that a user can normally use network service in the elevator. The method is used for solving the problem that the wireless signals in the elevator are shielded, so that the user network experience is poor.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect, a communication method is provided, which is applied to a base station device in a communication system, the communication system further includes a follow-up device, and the follow-up device is used for providing network coverage for an elevator; the method comprises the following steps: the base station equipment determines the current output power of a wireless signal sent by the base station equipment to the slave equipment; under the condition that the current output power is equal to the preset maximum power, a gain indication is sent to the follow-up equipment; the gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.
In the communication method provided by the application, the base station equipment sends a gain indication to the follow-up equipment after determining that the current output power reaches the preset maximum output power, so that the follow-up equipment responds to the gain indication to process a wireless signal and guarantee network coverage in an elevator. Therefore, the quality of the output signal of the base station equipment is stable, and the problem of elevator network coverage of higher floors can be solved by matching with the gain adjustment of the follow-up equipment.
In one possible design, the determining the current output power of the wireless signal sent by the base station device to the slave device includes: and the base station equipment determines the current output power as the preset minimum power under the condition that the distance between the base station equipment and the follow-up equipment is less than or equal to a first preset distance. Further, the base station equipment determines theoretical output power according to the distance when the distance is greater than a first preset distance, and determines current output power according to the magnitude of the theoretical output power and a preset maximum power; the theoretical output power is positively correlated with the distance. The design realizes that the output power of the base station equipment is reduced under the condition that the distance between the base station equipment and the follow-up equipment is short, the interference to the follow-up equipment is avoided, and the output power can be improved under the condition that the distance between the follow-up equipment and the follow-up equipment is long, so that the follow-up equipment can receive the input power of a wireless signal, and the network coverage is better provided for the elevator.
In one possible design, the determining the current output power according to the theoretical output power and the preset maximum power includes: the base station equipment determines the current output power as the theoretical output power under the condition that the theoretical output power is less than or equal to the preset maximum power; and under the condition that the theoretical output power is greater than the preset maximum power, determining the current output power as the preset maximum power. In this design it is achieved how the base station device determines the output power of the transmitted radio signal in case the distance is larger than a first preset distance.
In one possible design, the base station device includes a ranging module, and before determining that the current output power is the preset minimum power, the method further includes: the base station equipment determines the distance between the base station equipment and the follow-up equipment through the ranging module. In this design, an implementation manner for determining the distance by the base station device is provided.
In one possible design, in a case that the gain indication includes a distance between the base station device and the follower device, the gain indication is used to instruct the follower device to adjust a gain of the follower device according to the distance after receiving the wireless signal, and process the received wireless signal based on the adjusted gain. In the design, how to adjust the gain by the follow-up device is indicated so as to meet the network coverage of the elevator.
In a second aspect, a communication method is provided, which is applied to a follower device in a communication system, the follower device is used for providing network coverage for an elevator, and the communication system further includes a base station device. The communication method comprises the following steps: the method comprises the following steps that a follow-up device receives a gain indication sent by a base station device; the gain indication is sent by the base station device under the condition that the current output power is equal to the preset maximum power. Further, after receiving the wireless signal sent by the base station device, the slave device starts to adjust the gain of the slave device in response to the gain indication; and processes the received wireless signal based on the adjusted gain.
According to the communication method, the gain of the follow-up equipment is adjusted under the condition that the base station equipment can not increase the output power, so that the network coverage provided by the follow-up equipment for the elevator can meet the network use requirements of users in the elevator.
In one possible design, the beginning to adjust the gain of the follower device in response to the gain indication includes: the method comprises the steps that the follow-up equipment determines the input power of a received wireless signal sent by the base station equipment; and adjusting the gain of the follower device based on the input power, the input power being inversely related to the gain of the follower device. The design provides a gain adjustment method capable of meeting the requirement of elevator network coverage.
In a possible design, where the gain indication includes a distance between the base station device and the follower device, the starting to adjust the gain of the follower device in response to the gain indication includes: the method comprises the following steps that the following equipment determines a difference value between a distance and a second preset distance, the second preset distance is used for indicating the base station equipment to output at a preset maximum power, and the following equipment normally provides network coverage for the elevator under the condition that the input power of the following equipment is at a minimum gain; and adjusting the gain of the follow-up equipment according to the difference value, wherein the difference value is positively correlated with the gain of the follow-up equipment. The design provides a gain adjustment method capable of meeting the requirement of elevator network coverage.
In a possible design, the communication method further includes the following device determining a current isolation of the following device; and stopping adjusting the gain of the follow-up equipment under the condition that the current isolation is less than or equal to the preset isolation. In the design, the following equipment stops adjusting the gain according to the isolation degree in order to avoid self-excitation, and abnormal wireless signals are prevented from being transmitted.
In a third aspect, a base station device is provided, where the base station device is deployed in a communication system, and the communication system further includes a follower device, and the follower device is used to provide network coverage for an elevator; the base station device includes a determination unit and a transmission unit. The determining unit is used for determining the current output power of the wireless signal sent by the base station equipment to the slave equipment. The sending unit is used for sending a gain indication to the follow-up equipment under the condition that the current output power is equal to the preset maximum power; the gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.
In a possible design, the determining unit is specifically configured to determine that the current output power is the preset minimum power when a distance between the base station device and the follower device is smaller than or equal to a first preset distance. Determining theoretical output power according to the distance under the condition that the distance is greater than a first preset distance, and determining current output power according to the magnitude of the theoretical output power and preset maximum power; the theoretical output power is positively correlated with the distance.
In a possible design, the determining unit is specifically configured to determine that the current output power is the theoretical output power when the theoretical output power is less than or equal to the preset maximum power. And under the condition that the theoretical output power is greater than the preset maximum power, determining the current output power as the preset maximum power.
In a possible design, the base station device includes a ranging module, and the determining unit is further configured to determine a distance between the base station device and the follower device through the ranging module.
In one possible design, in a case that the gain indication includes a distance between the base station device and the follower device, the gain indication is used to instruct the follower device to adjust a gain of the follower device according to the distance after receiving the wireless signal, and process the received wireless signal based on the adjusted gain.
In a fourth aspect, a follower device is provided, where the follower device is deployed in a communication system, the follower device is used to provide network coverage for an elevator, and the communication system further includes a base station device; the follow-up device includes: a receiving unit and a processing unit. The receiving unit is used for receiving the gain indication sent by the base station equipment; the gain indication is sent by the base station equipment under the condition that the current output power is equal to the preset maximum power. The processing unit is used for responding to the gain indication after receiving the wireless signal sent by the base station equipment and starting to adjust the gain of the follow-up equipment. The processing unit is further configured to process the received wireless signal based on the adjusted gain.
In a possible design, the processing unit is specifically configured to determine an input power of a received wireless signal transmitted by the base station device. The gain of the follower device is adjusted based on the input power, which is inversely related to the gain of the follower device.
In a possible design, in a case where the gain indication includes a distance between the base station device and the follower device, the processing unit is specifically configured to determine a difference between the distance and a second preset distance, where the second preset distance is used to indicate that the base station device outputs at a preset maximum power, and the follower device normally provides network coverage for the elevator when the input power of the follower device is at a minimum gain. And adjusting the gain of the follow-up equipment according to the difference, wherein the difference is positively correlated with the gain of the follow-up equipment.
In a possible design, the follow-up device further includes a determination unit. The determining unit is used for determining the current isolation of the follow-up equipment. The processing unit is further used for stopping adjusting the gain of the follow-up equipment under the condition that the current isolation degree is smaller than or equal to the preset isolation degree.
In a fifth aspect, a base station device is provided, the base station device comprising a memory and a processor; a memory for storing computer program code comprising computer instructions which, when executed by the processor, perform the communication method as provided by the first aspect or any one of its possible designs, is coupled to the processor.
In a sixth aspect, a follower device is provided, the follower device comprising a memory and a processor; a memory for storing computer program code comprising computer instructions which, when executed by the processor, perform the communication method as provided by the second aspect or any possible design thereof is coupled to the processor.
In a seventh aspect, a computer-readable storage medium is provided, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a base station device, the instructions cause the base station device to perform the communication method as provided in the first aspect or any possible implementation manner thereof.
In an eighth aspect, a computer-readable storage medium is provided, having instructions stored therein, which when run on a follower device, cause the follower device to perform the communication method as provided by the second aspect or any one of its possible implementations.
Drawings
Fig. 1 is a first structural diagram of a communication system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 3 is a first flowchart illustrating a communication method according to an embodiment of the present application;
fig. 4 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 5 is a third schematic flowchart of a communication method according to an embodiment of the present application;
fig. 6 is a fourth flowchart illustrating a communication method according to an embodiment of the present application;
fig. 7 is a fifth flowchart illustrating a communication method according to an embodiment of the present application;
fig. 8 is a sixth flowchart of a communication method according to an embodiment of the present application;
fig. 9 is a seventh flowchart of a communication method according to an embodiment of the present application;
fig. 10 is a schematic diagram illustrating a gain variation of a servo device according to an embodiment of the present application;
fig. 11 is a first schematic structural diagram of a base station device according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a servo device provided in an embodiment of the present application;
fig. 13 is a schematic structural diagram of a base station device according to an embodiment of the present application;
fig. 14 is a third schematic structural diagram of a base station device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In the embodiments of the present application, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" or "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.
In the prior art, in a communication system 10 as shown in fig. 1, a host device is disposed in an elevator machine room for receiving an outdoor wireless signal and transmitting a wireless signal to a slave device disposed in an elevator car. The slave equipment is used for receiving the wireless signal sent by the host equipment and providing network coverage for the elevator after gain. Because outdoor wireless signals are greatly influenced by electromagnetic environment, output is unstable, and user experience is influenced.
In order to solve the above problems, the present application provides a communication method, a device and a storage medium, which are applied to a base station device in a communication system, and the communication system further includes a follow-up device, wherein the follow-up device is used for providing network coverage for an elevator. The base station equipment determines the current output power of a wireless signal sent by the base station equipment to the slave equipment; under the condition that the current output power is equal to the preset maximum power, a gain indication is sent to the follow-up equipment; the gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain. In the communication method provided by the application, the base station equipment sends a gain indication to the follow-up equipment after determining that the current output power reaches the preset maximum output power, so that the follow-up equipment responds to the gain indication to process a wireless signal and guarantee network coverage in an elevator. Therefore, the quality of the output signal of the base station equipment is stable, and the problem of elevator network coverage of higher floors can be solved by matching with the gain adjustment of the follow-up equipment.
Fig. 2 shows a communication system, and the communication method provided by the embodiment of the present application can be applied to the communication system shown in fig. 2 to solve the problem of network coverage in an elevator. As shown in fig. 2, the communication system 20 includes a base station apparatus 21 and a follower apparatus 22.
Wherein the base station device 21 can wirelessly communicate with the receiving antenna of the follower device 22 through the transmitting antenna of the base station device 21, and the follower device 22 can provide network coverage for the elevator through the transmitting antenna of the follower device 22. The antennas shown in fig. 2 do not constitute a limitation on the number of antennas of the base station device 21 and the follower device 22.
It should be noted that the base station device 21 may be disposed at the top of the elevator shaft or at the bottom of the elevator shaft, and in the communication system shown in fig. 2, the base station device 21 is disposed at the top of the elevator shaft.
With the base station equipment 21 deployed at the top of the elevator hoistway, the follower equipment 22 is deployed at the top of the elevator car; in the case of a base station device 21 deployed at the bottom of the elevator shaft, a follower device 22 is deployed at the bottom of the elevator car for realizing the network coverage for the elevator.
The base station device 21 may be a small cell and a micro cell, or a remote device of the small cell and a remote device of the micro cell, which is not specifically limited in this embodiment of the present application.
The base station device 21 further includes a ranging module, which is used to determine a distance between the base station device 21 and the follower device 22.
The base station device 21 may also be configured to adjust the current output power of the transmitted wireless signal according to the determined distance, so that the follower device 22 can receive the wireless signal transmitted by the base station device 21 with a stable input power to provide network coverage for the elevator.
The base station device 21 may also be configured to send a gain indication to the follower device.
The follower device 22 may be configured to gain the wireless signal transmitted by the base station device 21 after receiving the gain indication transmitted by the base station device 21, so as to provide network coverage for the elevator.
Fig. 3 is a flow diagram illustrating a method of communication, according to some example embodiments. In some embodiments, the above-described communication method may be applied to the base station apparatus 21 in the communication system 20 shown in fig. 2. Hereinafter, the present embodiment will describe the communication method described above by taking an example in which the communication method is applied to the base station apparatus 21.
As shown in fig. 3, the communication method provided in the embodiment of the present application includes the following steps S301 to S303.
S301, the base station equipment determines the current output power of the wireless signal sent by the base station equipment to the slave equipment.
As a possible implementation manner, since power loss may be caused due to an increase in distance during transmission of a wireless signal, to ensure the input power of the slave device, the base station device monitors the input power of the slave device, and adjusts the current output power of the wireless signal according to the input power of the slave device.
It should be noted that the monitoring of the input power of the slave device by the base station device may be that the base station device periodically obtains the input power fed back by the slave device; the following device may also send a request for adjusting the current output power to the base station device after determining that the input power is lower than a preset minimum input power threshold or higher than a preset maximum input power threshold. Presetting a minimum input power threshold as the minimum input power which is based on the input power and can normally provide network coverage for the elevator by the follow-up equipment; the preset maximum input power threshold is the maximum output power of the wireless signal sent by the base station equipment, which does not cause interference to the wireless signal output by the follow-up equipment.
In some embodiments, the base station apparatus may further adjust a current output power of transmitting the wireless signal according to a distance between the base station apparatus and the follower apparatus, transmit the wireless signal at a lower output power when the distance is smaller, and increase the output power when the distance is larger.
It should be noted that, for a specific implementation manner of how the base station device specifically adjusts the current output power according to the distance, reference may be made to subsequent descriptions in the embodiments of the present application, and details are not described here again.
S302, the base station equipment determines whether the current output power is equal to the preset maximum power.
The preset maximum power is the rated maximum output power of the base station equipment.
As a possible implementation manner, the base station apparatus determines whether to transmit the wireless signal at the rated maximum output power at present based on the present output power determined in the above step S301, compared with the preset maximum power.
And S303, the base station equipment sends a gain indication to the follow-up equipment under the condition that the current output power is equal to the preset maximum power.
The gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.
As a possible implementation manner, in the case that the base station device determines that the current output power is equal to the preset maximum power in step S302, the base station device generates a gain indication and sends the gain indication to the slave device.
Accordingly, the follower device receives the gain indication and adjusts the gain of the follower device based on the gain indication.
In some embodiments, the base station device includes a ranging module to determine a distance between the base station device and the follower device.
The gain indication sent by the base station equipment to the follow-up equipment also comprises the distance between the base station equipment and the follow-up equipment
And under the condition that the gain indication comprises the distance between the base station equipment and the follow-up equipment, the gain indication is used for indicating the follow-up equipment to adjust the gain of the follow-up equipment according to the distance after receiving the wireless signal, and the received wireless signal is processed based on the adjusted gain.
It can be understood that, according to the communication method provided by the application, the output power of the base station device is firstly adjusted to ensure the input power of the follow-up device, and the base station device sends a gain indication to the follow-up device under the condition that the network coverage of the elevator cannot be ensured by adjusting the output power of the base station device, so that the gain of the follow-up device is adjusted, the network coverage is provided for the elevator, and the network use experience of a user is ensured.
In one design, to avoid error code generation due to distortion of a saturation signal of a slave device caused by excessively high output power of a base station device when the base station device is close to the slave device, and to ensure input power of the slave device, as shown in fig. 4, the communication method provided in this embodiment further includes S401 to S404.
S401, the base station equipment determines the distance between the base station equipment and the follow-up equipment.
As a possible implementation manner, the base station device includes a ranging module therein, and the distance between the base station device and the follower device is determined based on the ranging module.
It should be noted that the ranging module may be a radar or an infrared laser device built in the base station device, which is not limited in this embodiment of the present application.
In some embodiments, the base station device determines the distance between the base station device and the follower device according to the wireless signal transmission time and the reception time between the base station device and the follower device.
Illustratively, after receiving a distance measurement instruction sent by a slave device, a base station device records a receiving time t1, where the distance measurement instruction includes a sending time t2 when the slave device sends a wireless signal, and the distance measurement instruction is used to instruct the base station device to determine a distance L between the base station device and the slave device, and if a transmission rate of the wireless signal is v, the distance L = v (t 1-t 2) between the base station device and the slave device.
S402, the base station device determines that the current output power is the preset minimum power under the condition that the distance between the base station device and the follow-up device is smaller than or equal to the first preset distance.
The preset minimum power is the rated minimum output power of the base station equipment.
As a possible implementation manner, the base station device determines whether the distance between the base station device and the follower device is less than or equal to the first preset distance based on the distance between the base station device and the follower device determined in the step S401. If yes, the base station equipment determines to send the wireless signal at the rated minimum output power, and interference on the follow-up equipment is avoided.
It should be noted that the first preset distance may be preset in the base station device by an operation and maintenance person of the communication system, and for example, the first preset distance may be 1 meter.
In some embodiments, taking the base station device as a small base station as an example, the rated minimum output power of the small base station may be 10dBm, and the rated maximum output power may be 27dBm.
Illustratively, when the small base station detects that the distance from the follow-up device is less than or equal to 1 meter, a wireless signal is sent to the follow-up device at an output power of 10dBm, so that the follow-up device is not interfered by the wireless signal sent by the base station device when providing network coverage for the elevator, and the user experience is guaranteed.
And S403, determining theoretical output power according to the distance by the base station equipment under the condition that the distance is greater than a first preset distance.
Wherein the theoretical output power is positively correlated with the distance.
As a possible implementation manner, the base station device determines the theoretical output power according to the distance and a preset relationship between the distance and the theoretical output power when the distance is greater than the first preset distance.
It should be noted that, in order to ensure that the input power of the follower device is not changed, the base station device needs to increase the output power according to the change of the distance as the distance increases, and the preset relationship between the distance and the theoretical output power satisfies the following formula:
P=P 0 +k 1 ×lgd
where P is the theoretical output power, P 0 Is the rated minimum output power, k, of the base station equipment 1 D is the distance between the base station equipment and the follow-up equipment.
To be noted, k 1 After a plurality of tests, operation and maintenance personnel of the communication system can adjust the power of the base station equipment to meet the input power requirement of the follow-up equipment, exemplarily k 1 And may be 20.
And S404, the base station equipment determines the current output power according to the theoretical output power and the preset maximum power.
The preset maximum power is the rated maximum output power of the base station equipment.
As shown in fig. 5, in the communication method provided in the embodiment of the present application, S404 includes S4041-S4042.
S4041, the base station device determines that the current output power is the theoretical output power when the theoretical output power is less than or equal to the preset maximum power.
As a possible implementation manner, since the theoretical output power is an output power that can meet the input power requirement of the slave device at the corresponding distance, the base station device determines the current output power as the theoretical output power when the theoretical output power is less than or equal to the rated maximum output power of the base station device, and sends the wireless signal to the slave device with the theoretical output power.
S4042, the base station device determines that the current output power is the preset maximum power under the condition that the theoretical output power is larger than the preset maximum power.
As a possible implementation manner, since the theoretical output power is an output power that can meet the input power requirement of the slave device at the corresponding distance, but the base station device can reach its rated maximum output power at the highest, the base station device sends the wireless signal to the slave device at the rated maximum output power when the theoretical output power is greater than its own rated maximum output power, thereby ensuring the input power of the slave device as much as possible.
It can be understood that, according to the communication method in the embodiment of the present application, when the base station device is close to the slave device, the slave device may be prevented from generating an error code due to distortion of a saturation signal of the slave device due to excessively high output power of the base station device, and before the base station is adjusted to the rated maximum output power, the input power of the slave device may be ensured, and the quality of the output wireless signal is stable compared with that of the host device in the prior art.
In one design, FIG. 6 is a flow diagram illustrating a method of communication, according to some example embodiments. In some embodiments, the above-described communication method may be applied to a follower device 22 in a communication system 20 as shown in fig. 2. Hereinafter, the embodiment of the present application will describe the communication method described above by taking an example in which the communication method is applied to the slave device 22.
As shown in fig. 6, a communication method provided in the embodiment of the present application includes the following steps S501 to S503.
S501, the following equipment receives the gain indication sent by the base station equipment.
And the gain indication is sent by the base station equipment under the condition that the current output power is equal to the preset maximum power.
As a possible implementation, the slave device receives the gain indication sent by the base station device based on a radio path with the base station device.
S502, after receiving the wireless signal sent by the base station device, the slave device starts to adjust the gain of the slave device in response to the gain indication.
As a possible implementation manner, after receiving the wireless signal sent by the base station device, the follower device adjusts the strength of its gain in response to the gain indication received in step S501, so as to provide stable network coverage for the elevator.
It should be noted that, how to adjust the gain of the slave device specifically may refer to subsequent descriptions in the embodiments of the present application, and details are not described here again.
And S503, the follow-up device processes the received wireless signal based on the adjusted gain.
As a possible implementation manner, the follower device amplifies the received wireless signal based on the gain adjusted in step S502 described above, so that the user in the elevator can normally use the network service.
It can be understood that in the communication method provided in the embodiment of the present application, the slave device adjusts the gain of its own device under the condition that the base station device cannot increase the output power any more, so that the network coverage provided by the slave device for the elevator can meet the network use requirement of the user in the elevator.
In one design, in order to enable the network coverage provided by the follower device for the elevator to meet the network use requirement of users in the elevator, as shown in fig. 7, the communication method provided by the embodiment of the application further includes S601-S602.
S601, the follow-up device determines the input power of the received wireless signal sent by the base station device.
As a possible implementation method, the slave device detects the receiving antenna, and then determines the input power of the received wireless signal sent by the base station device.
And S602, the follow-up device adjusts the gain of the follow-up device according to the input power.
Wherein the input power is inversely related to the gain of the follower device.
As a possible implementation manner, the following device compensates the gain linearly, and based on the input power determined in the above step S601, the gain of the following unit is increased by 1dB every time the input power is decreased by 1dB, so as to ensure the network coverage provided by the following device for the elevator.
In one design, in a case where the gain indication sent by the base station device further includes a distance between the base station device and the follower device, in order to enable the follower device to provide the network coverage for the elevator to meet the network use requirement of the user in the elevator, as shown in fig. 8, the communication method provided in the embodiment of the present application further includes S701-S702.
S701, the following equipment determines a difference value between the distance and a second preset distance.
And the second preset distance is used for indicating the base station equipment to output at the preset maximum power, and the follow-up equipment normally provides network coverage for the elevator under the condition that the input power of the follow-up equipment is at the minimum gain.
As a possible implementation manner, the following device calculates a difference between the distance between the base station device and the following device and the second preset distance based on the distance in the base station device sending the gain indication and the second preset distance.
And S702, the follow-up device adjusts the gain of the follow-up device according to the difference value.
Wherein the difference is positively correlated with the gain of the slave device.
As a possible implementation, the follower device increases the gain of the follower device gradually as the difference increases.
It should be noted that, in order to ensure that the follower device can provide normal network coverage for the elevator, the difference increases with the increase of the distance, the follower device needs to adjust the gain according to the change of the distance, and the relationship between the distance and the gain satisfies the following formula:
G=G 0 +k 2 ×lg(x+1)
wherein G is the adjusted gain, G 0 For the rated minimum gain of the follow-up device, k 2 And x is the difference value between the distance between the base station equipment and the follow-up equipment and a second preset distance, wherein the x is the power regulation coefficient.
To be noted, k 2 After a plurality of tests, operation and maintenance personnel of the communication system can adjust the gain of the follow-up equipment to normally provide network coverage for the elevator, wherein k is an exemplary method 2 And may be 20.
In one design, in order to avoid the interference caused to the receiving antenna due to the gain of the follower device being adjusted too high, as shown in fig. 9, the communication method provided in this embodiment further includes S801-S802.
S801, the follow-up device determines the current isolation of the follow-up device.
As a possible implementation manner, the following device determines a ratio between a wireless signal sent by the sending antenna and received by the receiving antenna of the following device and a wireless signal sent by the sending antenna, where the ratio is the current isolation.
S802, the following equipment stops adjusting the gain of the following equipment when the current isolation degree is smaller than or equal to the preset isolation degree.
As a possible implementation manner, the following device determines a magnitude relationship between the current isolation and the preset isolation, and stops adjusting the gain of the following device when the current isolation is less than or equal to the preset isolation.
It should be noted that the preset isolation may be preset in the slave device by an operation and maintenance person of the communication system. Illustratively, based on the hardware attribute of the slave device, the initial isolation of the slave device when amplifying the wireless signal with the minimum gain is determined, and the isolation is preset to be-15 dB of the initial isolation, that is, after the isolation of the slave device is reduced by 15dB, the adjustment of the gain of the slave device is stopped.
For example, a curve of the gain of the slave device as a function of the distance between the base station device and the slave device may be as shown in fig. 10, where in the first stage, in the case that the distance is less than or equal to the second preset distance, the slave unit maintains the rated minimum gain; and in the second stage, under the condition that the distance is greater than the second preset distance, the following unit increases the gain along with the increase of the distance until the third stage, the following equipment stops adjusting the gain of the following equipment after the isolation degree is equal to the preset isolation degree, the base station equipment in the communication system sends a wireless signal at the rated maximum output power, and the following equipment amplifies the wireless signal at the gain capable of ensuring that the isolation degree meets the requirement so as to provide network coverage for the elevator.
It can be understood that, as the gain of the follower device increases, the power of the wireless signal transmitted by the follower device increases, the receiving antenna is more easily interfered by the transmitting antenna, and wireless signal distortion may be caused, so that after the isolation degree of the follower unit reaches the preset isolation degree, the adjustment of the gain is stopped, and the stability of the network coverage provided by the follower device for the elevator can be ensured.
In some embodiments, if the elevator ascends from the bottom, the follow-up device first reduces the gain to the minimum according to the increase of the input power of the received wireless signal sent by the base station device. Further, along with the reduction of the distance, the base station equipment reduces the output power according to the distance between the base station equipment and the follow-up equipment, and avoids causing interference to the follow-up equipment and influencing the network coverage of the elevator.
The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the user equipment may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 11 is a schematic structural diagram of a base station device according to an embodiment of the present application. The base station device is used for executing the communication method. As shown in fig. 11, the base station apparatus 90 includes a determination unit 901 and a transmission unit 902.
A determining unit 901, configured to determine a current output power of the base station device for sending the wireless signal to the slave device. For example, as shown in fig. 3, the determining unit 901 may be configured to execute S301.
A sending unit 902, configured to send a gain indication to the slave device when the current output power is equal to a preset maximum power; the gain indication is used for indicating the follow-up device to start adjusting the gain of the follow-up device after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain. For example, as shown in fig. 3, the sending unit 902 may be configured to perform S303.
Optionally, as shown in fig. 11, in the base station device 90 provided in the embodiment of the present application, the determining unit 901 is specifically configured to determine that the current output power is the preset minimum power when the distance between the base station device and the follower device is less than or equal to a first preset distance. For example, as shown in fig. 4, the determining unit 901 may be configured to execute S402.
Determining theoretical output power according to the distance under the condition that the distance is greater than a first preset distance, and determining current output power according to the theoretical output power and the preset maximum power; the theoretical output power is positively correlated with the distance. For example, as shown in fig. 4, the determination unit 901 may be configured to perform S403-S404.
Optionally, as shown in fig. 11, in the base station device 90 provided in the embodiment of the present application, the determining unit 901 is specifically configured to determine that the current output power is the theoretical output power when the theoretical output power is less than or equal to the preset maximum power. For example, as shown in fig. 5, the determining unit 901 may be configured to perform S4041.
And under the condition that the theoretical output power is greater than the preset maximum power, determining the current output power as the preset maximum power. For example, as shown in fig. 5, the determining unit 901 may be configured to execute S4042.
Optionally, as shown in fig. 11, in the base station device 90 provided in the embodiment of the present application, the base station device includes a ranging module, and the determining unit 901 is further configured to determine a distance between the base station device and the follower device through the ranging module.
Optionally, as shown in fig. 11, in the base station device 90 provided in the embodiment of the present application, in a case that the gain indication includes a distance between the base station device and the follower device, the gain indication is used to indicate that the follower device adjusts a gain of the follower device according to the distance after receiving the wireless signal, and processes the received wireless signal based on the adjusted gain.
Fig. 12 is a schematic structural diagram of a servo device according to an embodiment of the present application. The follow-up device is used for executing the communication method. As shown in fig. 12, the follower device 100 includes a receiving unit 1001 and a processing unit 1002.
A receiving unit 1001, configured to receive a gain indication sent by a base station device; the gain indication is sent by the base station device under the condition that the current output power is equal to the preset maximum power. For example, as shown in fig. 6, the receiving unit 1001 may be configured to perform S501.
The processing unit 1002 is configured to, after receiving a wireless signal sent by the base station apparatus, start adjusting a gain of the follower apparatus in response to the gain indication. For example, as shown in fig. 6, the processing unit 1002 may be configured to execute S502.
The processing unit 1002 is further configured to process the received wireless signal based on the adjusted gain. For example, as shown in fig. 6, the processing unit 1002 may be configured to execute S503.
Optionally, as shown in fig. 12, in the following device 100, the processing unit 1002 is specifically configured to determine the input power of the received wireless signal sent by the base station device. For example, as shown in fig. 7, the processing unit 1002 may be configured to execute S601.
The gain of the follower device is adjusted based on the input power, which is inversely related to the gain of the follower device. For example, as shown in fig. 7, the processing unit 1002 may be configured to execute S602.
Optionally, as shown in fig. 12, in the follower device 100 provided in this embodiment of the present application, in a case that the gain indication includes a distance between the base station device and the follower device, the processing unit 1002 is specifically configured to determine a difference between the distance and a second preset distance, where the second preset distance is used to indicate that the base station device outputs at a preset maximum power, and the follower device normally provides network coverage for the elevator when the input power of the follower device is at a minimum gain. For example, as shown in fig. 8, the processing unit 1002 may be configured to execute S701.
And adjusting the gain of the follow-up equipment according to the difference, wherein the difference is positively correlated with the gain of the follow-up equipment. For example, as shown in fig. 8, the processing unit 1002 may be configured to execute S702.
Optionally, as shown in fig. 12, in the follower device 100 provided in the embodiment of the present application, the follower device further includes a determining unit 1003;
a determining unit 1003, configured to determine a current isolation of the slave device. For example, as shown in fig. 9, the determination unit 1003 may be configured to execute S801.
And the processing unit is also used for stopping adjusting the gain of the follow-up equipment under the condition that the current isolation degree is less than or equal to the preset isolation degree. For example, as shown in fig. 9, the processing unit 1002 may be configured to execute S802.
In the case of implementing the functions of the integrated modules in the form of hardware, the embodiments of the present application provide a possible structural schematic diagram of a base station device. The base station device is configured to perform the communication method performed by the base station device in the above-described embodiment. As shown in fig. 13, the base station apparatus 110 includes a processor 1101, a memory 1102, and a bus 1103. The processor 1101 and the memory 1102 may be connected by a bus 1103.
The processor 1101 is a control center of the base station device, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 1101 may be a Central Processing Unit (CPU), other general-purpose processors, or the like. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.
For one embodiment, processor 1101 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 13.
The memory 1102 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
As a possible implementation, the memory 1102 may be present separately from the processor 1101, and the memory 1102 may be connected to the processor 1101 by a bus 1103 for storing instructions or program code. The processor 1101 can implement the communication method provided by the embodiment of the present application when calling and executing the instructions or program codes stored in the memory 1102.
In another possible implementation, the memory 1102 may also be integrated with the processor 1101.
The bus 1103 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 13, but that does not indicate only one bus or one type of bus.
Note that the structure shown in fig. 13 does not constitute a limitation on the base station apparatus 110. In addition to the components shown in fig. 13, the base station apparatus 110 may include more or fewer components than shown in fig. 13, or combine certain components, or a different arrangement of components.
As an example, in connection with fig. 11, the determining unit 901 and the sending unit 902 in the base station device 90 implement the same functions as the processor 1101 in fig. 13.
Optionally, as shown in fig. 13, the base station device provided in this embodiment of the present application may further include a communication interface 1104.
A communication interface 1104 for connecting with other devices through a communication network. The communication network may be an ethernet network, a radio access network, a Wireless Local Area Network (WLAN), etc. The communication interface 1104 may include an acquisition unit for receiving data, and a transmission unit for transmitting data.
In one design, in the base station device provided in this embodiment of the present application, the communication interface may be further integrated in the processor.
Fig. 14 shows another hardware configuration of the base station apparatus in the embodiment of the present application. As shown in fig. 14, base station device 120 may include a processor 1201 and a communication interface 1202. The processor 1201 is coupled to a communication interface 1202.
The functions of the processor 1201 may refer to the description of the processor 1101 described above. The processor 1201 also has a memory function, and the function of the memory 1102 can be referred to.
The communication interface 1202 is used to provide data to the processor 1201. The communication interface 1202 may be an internal interface of the base station device, or may be an external interface (corresponding to the communication interface 1104) of the base station device.
It is to be noted that the structure shown in fig. 14 does not constitute a limitation of the base station apparatus, and the base station apparatus 120 may include more or less components than those shown in fig. 14, or combine some components, or arrange different components, in addition to the components shown in fig. 14.
Meanwhile, the structural schematic diagram of hardware of the following device provided in the embodiment of the present application may also refer to the description of the base station device in fig. 13 or fig. 14, which is not described herein again. Except that the server includes a processor for performing the steps performed by the server in the above-described embodiments.
Through the above description of the embodiments, it is clear for a person skilled in the art that, for convenience and simplicity of description, only the division of the above functional units is illustrated. In practical applications, the above function allocation can be performed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer executes the instructions, the computer executes each step in the method flow shown in the foregoing method embodiment.
Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method in the above-described method embodiments.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), read-Only Memory (ROM), erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Since the apparatus, the device computer-readable storage medium, and the computer program product in the embodiments of the present application may be applied to the method described above, for technical effects that can be obtained by the apparatus, the apparatus computer-readable storage medium, and the computer program product, reference may also be made to the method embodiments described above, and details of the embodiments of the present application are not repeated herein.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (22)

1. A communication method, applied to a base station device in a communication system, wherein the communication system further comprises a follower device for providing network coverage for an elevator; the method comprises the following steps:
determining the current output power of the wireless signal sent by the base station equipment to the slave equipment;
under the condition that the current output power is equal to the preset maximum power, sending a gain indication to the follow-up equipment; the gain indication is used for indicating the follow-up equipment to start to adjust the gain of the follow-up equipment after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.
2. The communication method according to claim 1, wherein the determining the current output power of the base station device for transmitting the wireless signal to the slave device comprises:
determining the current output power to be a preset minimum power under the condition that the distance between the base station equipment and the follow-up equipment is smaller than or equal to a first preset distance;
determining theoretical output power according to the distance under the condition that the distance is greater than the first preset distance, and determining the current output power according to the theoretical output power and the preset maximum power; the theoretical output power is positively correlated with the distance.
3. The communication method according to claim 2, wherein the determining the current output power according to the theoretical output power and the preset maximum power comprises:
determining the current output power as the theoretical output power under the condition that the theoretical output power is less than or equal to the preset maximum power;
and under the condition that the theoretical output power is greater than the preset maximum power, determining the current output power as the preset maximum power.
4. The communication method according to claim 2, wherein the base station device comprises a ranging module, and before the determining that the current output power is the preset minimum power, the method further comprises:
determining, by the ranging module, a distance between the base station device and the follower device.
5. The communication method according to any of claims 1-4, wherein in a case that the gain indication includes a distance between the base station device and the follower device, the gain indication is used to instruct the follower device to adjust the gain of the follower device according to the distance after receiving the wireless signal, and process the received wireless signal based on the adjusted gain.
6. A communication method, characterized in that it is applied to a follower device in a communication system, said follower device is used for providing network coverage for an elevator, said communication system further comprises a base station device; the method comprises the following steps:
receiving a gain indication sent by the base station equipment; the gain indication is sent by the base station equipment under the condition that the current output power is equal to the preset maximum power;
after receiving a wireless signal sent by the base station equipment, responding to the gain indication, and starting to adjust the gain of the follow-up equipment;
the received wireless signal is processed based on the adjusted gain.
7. The communication method according to claim 6, wherein said starting to adjust the gain of the slave device in response to the gain indication comprises:
determining input power of a received wireless signal transmitted by the base station equipment;
and adjusting the gain of the follow-up device according to the input power, wherein the input power is inversely related to the gain of the follow-up device.
8. The communication method according to claim 6, wherein, in a case that the gain indication includes a distance between the base station device and the follower device, the starting to adjust the gain of the follower device in response to the gain indication comprises:
determining a difference value between the distance and a second preset distance, wherein the second preset distance is used for indicating the base station equipment to output at the preset maximum power, and the follow-up equipment normally provides network coverage for the elevator under the condition that the input power of the follow-up equipment is at the minimum gain;
and adjusting the gain of the follow-up device according to the difference, wherein the difference is positively correlated with the gain of the follow-up device.
9. The communication method according to any one of claims 6-8, wherein the method further comprises:
determining the current isolation of the follow-up equipment;
and stopping adjusting the gain of the follow-up equipment under the condition that the current isolation is less than or equal to the preset isolation.
10. A base station device, characterized in that the base station device is deployed in a communication system, the communication system further comprising a follower device for providing network coverage for an elevator; the base station device comprises a determining unit and a transmitting unit;
the determining unit is configured to determine a current output power of a wireless signal sent by the base station device to the slave device;
the sending unit is used for sending a gain indication to the follow-up equipment under the condition that the current output power is equal to the preset maximum power; the gain indication is used for indicating the follow-up equipment to start to adjust the gain of the follow-up equipment after receiving the wireless signal, and processing the received wireless signal based on the adjusted gain.
11. The base station device according to claim 10, wherein the determining unit is specifically configured to determine that the current output power is a preset minimum power if a distance between the base station device and the follower device is smaller than or equal to a first preset distance;
determining theoretical output power according to the distance under the condition that the distance is greater than the first preset distance, and determining the current output power according to the theoretical output power and the preset maximum power; the theoretical output power is positively correlated with the distance.
12. The base station device according to claim 11, wherein the determining unit is specifically configured to determine that the current output power is the theoretical output power when the theoretical output power is less than or equal to the preset maximum power;
and under the condition that the theoretical output power is greater than the preset maximum power, determining the current output power as the preset maximum power.
13. The base station device according to claim 11, wherein the base station device comprises a ranging module, and the determining unit is further configured to determine the distance between the base station device and the follower device through the ranging module.
14. The base station device according to any of claims 10-13, wherein in case the gain indication comprises a distance between the base station device and the follower device, the gain indication is configured to instruct the follower device to adjust a gain of the follower device according to the distance after receiving a wireless signal, and process the received wireless signal based on the adjusted gain.
15. A follower device, wherein the follower device is deployed in a communication system, wherein the follower device is configured to provide network coverage for an elevator, wherein the communication system further comprises a base station device; the follow-up device includes: a receiving unit and a processing unit;
the receiving unit is configured to receive a gain indication sent by the base station device; the gain indication is sent by the base station equipment under the condition that the current output power is equal to the preset maximum power;
the processing unit is configured to start adjusting the gain of the slave device in response to the gain indication after receiving the wireless signal sent by the base station device;
the processing unit is further configured to process the received wireless signal based on the adjusted gain.
16. The slave device according to claim 15, wherein the processing unit is configured to determine an input power of a received radio signal transmitted by the base station device;
and adjusting the gain of the follow-up device according to the input power, wherein the input power is inversely related to the gain of the follow-up device.
17. The slave device according to claim 15, wherein in case the gain indication comprises a distance between the base station device and the slave device, the processing unit is specifically configured to determine a difference between the distance and a second preset distance, the second preset distance is used to indicate that the base station device outputs at the preset maximum power, and in case the gain of the input power of the slave device is minimum, the slave device normally provides network coverage for the elevator;
and adjusting the gain of the follow-up device according to the difference, wherein the difference is positively correlated with the gain of the follow-up device.
18. A follower device according to any of claims 15-17, further comprising a determination unit;
the determining unit is used for determining the current isolation of the follow-up equipment;
the processing unit is further configured to stop adjusting the gain of the follower device when the current isolation is less than or equal to a preset isolation.
19. A base station device comprising a memory and a processor;
the memory and the processor are coupled;
the memory for storing computer program code, the computer program code comprising computer instructions;
the base station device, when executing the computer instructions by the processor, performs the communication method of any one of claims 1-5.
20. A slave device comprising a memory and a processor;
the memory and the processor are coupled;
the memory for storing computer program code, the computer program code comprising computer instructions;
the follower device, when executing the computer instructions, performs the communication method of any of claims 6-9.
21. A computer-readable storage medium having instructions stored therein, which when run on a base station device, cause the base station device to perform the communication method of any one of claims 1-5.
22. A computer-readable storage medium having instructions stored therein, which when run on a slave device, cause the slave device to perform the communication method of any one of claims 6-9.
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