CN118102427A - Power control method and device - Google Patents

Abstract

A power control method and apparatus, the method comprising: receiving first information through a first link, wherein the first link is a link between the terminal and first access network equipment; and determining uplink transmission power of a second link based on the first information, wherein the second link is a link between the terminal and second access network equipment. The power control method and the power control device provided by the application determine the uplink transmission power on the second link of the terminal and the second access network device by using the first information sent by the first access network device, can realize the uplink power control of the second link under the condition that the downlink transmission of the second link is not needed, can reduce the power consumption of the terminal and the interference level of a cell, and improves the transmission performance and the system capacity.

Description

Power control method and device

Technical Field

The present application relates to the field of wireless communication technology, and in particular to a power control method and device.

Background technique

Indoor visible light communication (VLC) uses the high-speed flashing of light-emitting diodes (LEDs) to transmit information, using free space as the transmission channel. It is a new type of high-speed and environmentally friendly indoor access network technology. Since the light emitted by LED light sources has a certain directionality, its own coverage range is small, and the service will be interrupted when the user moves to an area that is not covered by visible light communication. In addition, compared with the penetration of wireless communication, VLC is easily affected by obstructions, causing the interruption of the communication link. At the same time, considering the difficulty of implementing visible light uplink in practical applications, VLC is generally combined with other wireless access methods for heterogeneous networking. Taking radio frequency as an example, in the heterogeneous networking of visible light communication, it is assumed that visible light has only downlink and no uplink; both uplink and downlink of radio frequency links exist, as shown in Figure 1.

A system flow of visible light heterogeneous networking is shown in Figure 2, which mainly includes:

A) After the terminal is powered on, it goes through a series of processes such as synchronization and random access in the RF uplink and downlink, first accesses the RF base station, and then enters the RF connection state.

B) The RF base station configures candidate visible light base stations for the terminal. The terminal measures the synchronization signal quality of the candidate visible light base stations and reports it to the RF base station via RF uplink. The RF base station selects one or more visible light base stations with the best quality and adds them through reconfiguration.

C) The visible light base station sends data to the terminal, and the terminal provides feedback via RF uplink.

After the terminal establishes the RRC connection of radio frequency and visible light, in order to save energy, the radio frequency downlink can be turned off. At this time, all control channels and data channels in the downlink direction are transmitted via visible light downlink.

Power control is a basic function in wireless communication systems, which is used to compensate for the fading effects of wireless channels so that the signal can reach the receiver with a more appropriate power. When the channel state is good, the transmitter can reduce the transmit power; when the channel state is poor, the transmitter can increase the transmit power to ensure the receiving performance and maintain the signal-to-noise ratio of the receiver within a relatively constant range. By adopting a reasonable power control scheme, on the one hand, the power consumption of the transmitter can be reduced, which is of great significance for terminal power consumption control; on the other hand, the interference level between cells can be controlled to improve transmission performance and system capacity. In the 5G system, there is only uplink power control, and uplink power control is performed for each beam, including open-loop power control and closed-loop power control, in which the path loss part is obtained from the downlink path loss value estimated by the terminal.

In the existing visible light heterogeneous networking system process, when the terminal is in the idle state, the RF downlink sends the synchronization signal block (SSB), and the terminal can perform power control of the physical random access channel/physical uplink shared channel/physical uplink control channel (PRACH/PUSCH/PUCCH) according to the uplink power control process of 5G NR. When the terminal enters the connected state, in order to save energy, the RF downlink is turned off, and all control channels and data channels are transmitted through visible light downlink. At this time, for the RF uplink, there is no corresponding RF downlink for the terminal to measure and calculate the path loss. Therefore, how the terminal obtains the path loss value required for RF uplink power control through visible light downlink needs to be designed.

Summary of the invention

At least one embodiment of the present application provides a power control method and device for solving the problem of how to perform uplink power control on a second link when downlink transmission on the second link is turned off.

In order to solve the above technical problems, this application is implemented as follows:

In a first aspect, an embodiment of the present application provides a power control method, which is applied to a terminal, including:

receiving first information through a first link, where the first link is a link between the terminal and a first access network device;

Based on the first information, an uplink transmission power of a second link is determined, where the second link is a link between the terminal and a second access network device.

Optionally, the first access network device provides a first access mode to the terminal, and the second access network device provides a second access mode to the terminal, and the first mode is different from the second mode.

Optionally, the first access mode includes optical communication access, and the second access mode includes radio frequency access.

Optionally, determining the uplink transmit power of the second link based on the first information includes:

Determine a downlink path loss of a second link based on the first information;

Based on the downlink path loss of the second link, an uplink transmission power of the second link is determined.

Optionally, the first information includes a first downlink reference signal and first association information, where the first association information is association information between a downlink path loss of the first link and a downlink path loss of the second link;

The determining, based on the first information, a downlink path loss of the second link includes:

The terminal measures a first downlink reference signal to obtain a downlink path loss of a first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the first association information.

Optionally, the obtaining of the first associated information includes:

The terminal measures the downlink reference signals sent by the first access network device and the second access network device to obtain downlink path losses of the first link and the second link;

The terminal sends the downlink path losses of the first link and the second link to the second access network device, so that the second access network device obtains the first association information through training based on the downlink path losses of the first link and the second link.

Optionally, the first information includes a first downlink reference signal;

The determining, based on the first information, a downlink path loss of the second link includes:

The terminal measures the first downlink reference signal to obtain a downlink path loss of the first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the second association information, wherein the second association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the obtaining of the second associated information includes:

The terminal measures the downlink reference signals sent by the first access network device and the second access network device to obtain downlink path losses of the first link and the second link;

The terminal obtains the second association information through training based on downlink path losses of the first link and the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device;

The determining, based on the first information, a downlink path loss of the second link includes:

The path loss from the second access network device to the first access network device included in the first information is determined as the downlink path loss of the second link.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device;

The determining, based on the first information, a downlink path loss of the second link includes:

The terminal measures the first downlink reference signal to obtain a downlink path loss of the first link;

The sum of the downlink path loss of the first link and the path loss from the second access network device to the first access network device is determined as the downlink path loss of the second link.

Optionally, the first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal;

The determining, based on the first information, a downlink path loss of the second link includes:

The terminal determines the downlink path loss of the second link in the current state as the downlink path loss of the second link.

Optionally, determining the uplink transmit power of the second link based on the first information includes:

Determine an uplink path loss of a second link based on the first information;

Based on the uplink path loss of the second link, an uplink transmit power of the second link is determined.

Optionally, the first information includes an uplink path loss of the second link;

The obtaining of the uplink path loss of the second link includes:

The terminal receives a first indication through a first link;

The terminal transmits an uplink signal on the second link using a maximum uplink transmit power or a preset transmit power according to the first indication, so that the second access network device measures an uplink path loss of the second link and transmits it to the first access network device.

Optionally, the first information includes an uplink target transmit power of the second link;

The determining the uplink transmission power of the second link based on the first information includes: determining the uplink target transmission power of the second link as the uplink transmission power of the second link.

Optionally, the obtaining of the uplink target transmit power of the second link includes:

The terminal receives a second indication through the first link;

According to the second indication, the terminal uses the maximum uplink transmit power or the preset transmit power to transmit an uplink signal on the second link, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device, thereby enabling the first access network device to determine the uplink target transmit power of the second link according to the uplink path loss of the second link and the uplink target receive power of the second link.

In a second aspect, an embodiment of the present application provides a power control method, which is applied to a first access network device, including:

The first information is sent via a first link, where the first link is a link between the first access network device and a terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

Optionally, the first access device provides a first access mode to the terminal, and the first access mode includes optical communication access.

Optionally, the first information includes a first downlink reference signal and first association information, and the first association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the obtaining of the first associated information includes:

The first access network device and the second access network device respectively send a downlink reference signal to the terminal;

The first access network device receives the first association information sent by the second access network device, where the first association information is obtained by the second access network device based on downlink path loss training of the first link and the second link sent by the terminal.

Optionally, the first information includes a first downlink reference signal; and the method further includes:

The first access network device and the second access network device respectively send downlink reference signals to the terminal so that the terminal measures the downlink path loss of the first link and the second link, and based on the downlink path loss of the first link and the second link, trains to obtain second association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device;

The obtaining of the path loss from the second access network device to the first access network device includes:

The first access network device measures a reference signal sent by the second access network device to obtain a path loss from the second access network device to the first access network device.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device;

The obtaining of the path loss from the second access network device to the first access network device includes:

The first access network device measures a reference signal sent by the second access network device to obtain a path loss from the second access network device to the first access network device.

Optionally, the first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal;

The obtaining of the downlink path loss of the second link includes:

The first access network device receives the downlink path loss of the second link in the current state sent by the second access network device; or, the first access network device receives the downlink path loss of the second link in different states sent by the second access network device, and determines the downlink path loss of the second link in the current state according to the current state.

Optionally, the first information includes an uplink path loss of the second link;

The obtaining of the uplink path loss of the second link includes:

The first access network device receives the uplink path loss of the second link sent by the second access network device.

Optionally, the first information includes an uplink target transmit power of the second link;

The obtaining of the uplink target transmission power of the second link includes:

The first access network device receives an uplink path loss of a second link sent by the second access network device;

The first access network device determines the uplink target transmission power of the second link based on the uplink target reception power and the uplink path loss of the second link.

In a third aspect, an embodiment of the present application provides a power control method, which is applied to a second access network device, including:

Receiving downlink path losses of a first link and a second link measured by a terminal, where the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal;

Based on the downlink path loss of the first link and the second link, first association information between the downlink path loss of the first link and the downlink path loss of the second link is obtained by training;

The first association information is sent to the first access network device.

Optionally, the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access.

In a fourth aspect, an embodiment of the present application provides a power control method, which is applied to a second access network device, including:

Obtaining a downlink path loss of a second link in different states, where the second link is a link between a second access network device and a terminal, and the state includes at least one of a terminal position, an operating frequency of the second access network device, and a reference signal;

The downlink path loss of the second link in different states or the downlink path loss of the second link in the current state is sent to the first access network device.

Optionally, the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access.

In a fifth aspect, an embodiment of the present application provides a power control method, which is applied to a second access network device, including:

Measuring an uplink signal sent by the terminal to obtain an uplink path loss of a second link, where the second link is a link between the terminal and a second access network device;

The uplink path loss of the second link is sent to the first access network device.

In a sixth aspect, an embodiment of the present application provides a terminal, including a transceiver and a processor, wherein:

The transceiver is configured to receive first information through a first link, where the first link is a link between the terminal and a first access network device;

The processor is used to determine the uplink transmission power of a second link based on the first information, where the second link is a link between the terminal and a second access network device.

In a seventh aspect, an embodiment of the present application provides a terminal, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the first aspect.

In an eighth aspect, an embodiment of the present application provides a first access network device, including a transceiver and a processor, wherein:

The transceiver is used to send first information through a first link, where the first link is a link between the first access network device and a terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

In the ninth aspect, an embodiment of the present application provides a first access network device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the second aspect.

In a tenth aspect, an embodiment of the present application provides a second access network device, including a transceiver and a processor, wherein:

The transceiver is used to receive downlink path losses of a first link and a second link measured by a terminal, wherein the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal;

The processor is configured to obtain, by training based on the downlink path losses of the first link and the second link, first association information between the downlink path loss of the first link and the downlink path loss of the second link.

In an eleventh aspect, an embodiment of the present application provides a second access network device, including a transceiver and a processor, wherein:

The processor is configured to obtain a downlink path loss of a second link in different states, where the second link is a link between a second access network device and a terminal, and the state includes at least one of a terminal position, an operating frequency point of the second access network device, and a reference signal;

The transceiver is used to send the downlink path loss of the second link in different states or the downlink path loss of the second link in the current state to the first access network device.

In a twelfth aspect, an embodiment of the present application provides a second access network device, including a transceiver and a processor, wherein:

The processor is configured to measure an uplink signal sent by the terminal to obtain an uplink path loss of a second link, where the second link is a link between the terminal and a second access network device;

The transceiver is used to send the uplink path loss of the second link to the first access network device.

In the thirteenth aspect, an embodiment of the present application provides a second access network device, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the method as described in any one of the third to fifth aspects are implemented.

In a fourteenth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the steps of the method described above are implemented.

Compared with the prior art, the power control method and device provided in the embodiment of the present application use the first information sent by the first access network device to determine the uplink transmission power on the second link between the terminal and the second access network device, and can achieve uplink power control of the second link without the need for downlink transmission of the second link, thereby reducing terminal power consumption and cell interference levels, and improving transmission performance and system capacity.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

FIG1 is a schematic diagram of an application scenario of an embodiment of the present invention;

FIG2 is a schematic diagram of an initial access process of a visible light heterogeneous network in the prior art;

FIG3 is a flow chart of a power control method according to an embodiment of the present application when applied to a terminal side;

FIG4 is a flow chart of a power control method according to an embodiment of the present application when applied to a first access network device;

5-7 are several flow charts of the power control method according to the embodiment of the present application when it is applied to the second access network device;

8-14 are exemplary diagrams of several interactive processes of the power control method according to the embodiment of the present application;

FIG15 is a schematic diagram of the structure of a terminal according to an embodiment of the present application;

FIG16 is a schematic diagram of the structure of a terminal according to another embodiment of the present application;

FIG17 is a schematic diagram of the structure of a first access network device according to an embodiment of the present application;

FIG18 is a schematic structural diagram of a first access network device according to another embodiment of the present application;

19-22 are schematic diagrams of several structures of a second access network device according to an embodiment of the present application;

FIG23 is a schematic diagram of the structure of a terminal according to another embodiment of the present application;

FIG24 is a schematic structural diagram of a first access network device according to another embodiment of the present application;

FIG25 is a schematic diagram of the structure of a second access network device according to another embodiment of the present application.

Detailed ways

The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable in appropriate circumstances, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment. "And/or" in the specification and claims represents at least one of the connected objects.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the spirit and scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

In order to solve the problem in the prior art of how to perform uplink power control of the second link when the downlink transmission of the second link is turned off, an embodiment of the present application provides a power control method, which can perform uplink power control of the second link in the above scenario, improve communication performance, and improve user experience.

Referring to FIG. 3 , a power control method provided in an embodiment of the present application, when applied to a terminal side, includes:

Step 31: Receive first information through a first link, where the first link is a link between the terminal and a first access network device.

Here, the first access network device and the second access network device may be access network devices of the same type or different types. The first access network device provides a first mode of access to the terminal, and the second access network device provides a second mode of access to the terminal, and the first mode is different from the second mode. For example, the first access network device may be a visible light base station, and the first mode of access includes optical communication access, such as visible light communication access. The second access network device may be a radio frequency base station, and the second mode of access includes radio frequency access. For another example, the first access network device is a first radio frequency base station, the second access network device is a second radio frequency base station, and so on. In an embodiment of the present application, the link between the terminal and the first access network device is referred to as a first link, and the link between the terminal and the second access network device is referred to as a second link. Assume that after the terminal establishes the first link and the second link, the second access network device turns off the downlink transmission of the second link in order to reduce power consumption. At this time, the first access network device sends the first information to the terminal through the downlink transmission of the first link, and the terminal receives the above-mentioned first information through the first link.

Step 32: determine the uplink transmission power of a second link based on the first information, where the second link is a link between the terminal and a second access network device.

Through the above steps, the terminal uses the first information sent by the first access network device to determine the uplink transmission power on the second link between the terminal and the second access network device, so that the uplink power control of the second link can be achieved without the need for downlink transmission of the second link, which can reduce terminal power consumption and cell interference level, and improve transmission performance and system capacity.

For the above step 32, the present application embodiment provides several types of implementation methods, specifically:

1. In a first type of implementation, the terminal determines a downlink path loss of the second link based on the first information, and then determines an uplink transmission power of the second link based on the downlink path loss of the second link.

The first type of implementations described above may include multiple embodiments, for example:

(1) The first embodiment of the first type of implementation:

The first information includes a first downlink reference signal and first associated information, wherein the first associated information is associated information between the downlink path loss of the first link and the downlink path loss of the second link. At this time, in the above step 32, the terminal measures the first downlink reference signal to obtain the downlink path loss of the first link; then, according to the downlink path loss of the first link and the first associated information, the downlink path loss of the second link can be determined.

Here, before the above-mentioned step 31, the terminal can enable the second access network device to obtain the first association information in the following manner: the terminal measures the downlink reference signal sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link; the terminal sends the downlink path loss of the first link and the second link to the second access network device, so that the second access network device can obtain the first association information through training based on the downlink path loss of the first link and the second link.

(2) Second embodiment of the first type of implementation:

The first information includes a first downlink reference signal. At this time, in the above step 32, the terminal measures the first downlink reference signal to obtain a downlink path loss of the first link; then, according to the downlink path loss of the first link and the second associated information, the downlink path loss of the second link is determined, wherein the second associated information is associated information between the downlink path loss of the first link and the downlink path loss of the second link.

Here, before the above step 31, the terminal can obtain the second association information in the following manner: the terminal measures the downlink reference signal sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link; then, the terminal obtains the second association information through training based on the downlink path loss of the first link and the second link.

(3) The third embodiment of the first type of implementation:

The first information includes the path loss from the second access network device to the first access network device. At this time, in the above step 32, the terminal determines the path loss from the second access network device to the first access network device included in the first information as the downlink path loss of the second link.

(4) Fourth embodiment of the first type of implementation:

The first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device. At this time, in the above step 32, the terminal measures the first downlink reference signal to obtain a downlink path loss of the first link; then, the sum of the downlink path loss of the first link and the path loss from the second access network device to the first access network device is determined as the downlink path loss of the second link.

(5) Fifth embodiment of the first type of implementation:

The first information includes a downlink path loss of the second link in a current state, and the state includes at least one of a terminal location, an operating frequency of the second access network device, and a reference signal. At this time, in the above step 32, the terminal determines the downlink path loss of the second link in the current state as the downlink path loss of the second link.

2. In a second type of implementation, the terminal determines the uplink path loss of the second link based on the first information; then, based on the uplink path loss of the second link, determines the uplink transmit power of the second link. For example, the first information includes the uplink path loss of the second link. At this time, the uplink path loss of the second link can be determined based on the first information.

Here, before the above-mentioned step 31, the terminal can enable the second access network device to obtain the uplink path loss of the second link in the following manner: the terminal receives a first indication through the first link; the terminal uses the maximum uplink transmit power or the preset transmit power to send an uplink signal on the second link according to the first indication, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device.

3. In the third implementation, the first information includes the uplink target transmit power of the second link. In this case, the terminal directly determines the uplink target transmit power of the second link as the uplink transmit power of the second link.

Here, before the above-mentioned step 31, the terminal may enable the second access network device to obtain the uplink target transmission power of the second link in the following manner: the terminal receives the second indication through the first link; the terminal uses the maximum uplink transmission power or the preset transmission power to send an uplink signal on the second link according to the second indication, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device, thereby enabling the first access network device to determine the uplink target transmission power of the second link according to the uplink path loss of the second link and the uplink target receiving power of the second link.

Referring to FIG. 4 , a power control method provided in an embodiment of the present application, when applied to a first access network device side, includes:

Step 41, sending first information through a first link, where the first link is a link between the first access network device and a terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

Here, the first access network device and the second access network device may be access network devices of the same type or different types. For example, the first access network device may specifically be a visible light base station, and the second access network device may be a radio frequency base station. In this case, the first access device provides a first mode of access to the terminal, and the first mode of access includes optical communication access. For another example, the first access network device is a first radio frequency base station, the second access network device is a second radio frequency base station, and so on. In an embodiment of the present application, the link between the terminal and the first access network device is referred to as the first link, and the link between the terminal and the second access network device is referred to as the second link. Assume that after the terminal establishes the first link and the second link, the second access network device turns off the downlink transmission of the second link in order to reduce power consumption. At this time, the first access network device sends the first information to the terminal through the downlink transmission of the first link, and the terminal receives the above-mentioned first information through the first link, and then can determine the uplink transmission power of the second link based on the first information.

Through the above steps, the terminal can determine the uplink transmission power on the second link between the terminal and the second access network device, so that the uplink power control of the second link can be achieved without the need for downlink transmission of the second link, thereby reducing terminal power consumption and cell interference level, and improving transmission performance and system capacity.

Corresponding to the various implementations on the terminal side described above, there are also corresponding implementations on the first access network device side. The following implementations correspond in sequence to the various implementations on the terminal side described above.

Corresponding to the first embodiment of the first type of implementation on the terminal side above:

In this embodiment, the first information includes a first downlink reference signal and first association information, and the first association information is association information between the downlink path loss of the first link and the downlink path loss of the second link. At this time, the first access network device can obtain the first association information in the following manner: the first access network device and the second access network device respectively send a downlink reference signal to the terminal; the first access network device receives the first association information sent by the second access network device, and the first association information is obtained by the second access network device based on the downlink path loss of the first link and the second link sent by the terminal.

The second embodiment corresponding to the first type of implementation on the terminal side above:

In this embodiment, the first information includes a first downlink reference signal. At this time, the first access network device can enable the terminal to obtain the second association information in the following manner: the first access network device and the second access network device respectively send downlink reference signals to the terminal, so that the terminal measures and obtains the downlink path loss of the first link and the second link, and based on the downlink path loss of the first link and the second link, trains and obtains the second association information between the downlink path loss of the first link and the downlink path loss of the second link.

Corresponding to the third embodiment of the first type of implementation on the terminal side above:

In this embodiment, the first information includes a path loss from the second access network device to the first access network device. At this time, the second access network device can obtain the path loss from the second access network device to the first access network device in the following manner: the first access network device measures a reference signal sent by the second access network device to obtain the path loss from the second access network device to the first access network device.

The fourth embodiment corresponding to the first type of implementation on the terminal side above:

In this embodiment, the first information includes the first downlink reference signal and the path loss from the second access network device to the first access network device. At this time, the second access network device can obtain the path loss from the second access network device to the first access network device in the following manner: the first access network device measures the reference signal sent by the second access network device to obtain the path loss from the second access network device to the first access network device.

The fifth embodiment corresponding to the first type of implementation on the terminal side above:

In this embodiment, the first information includes the downlink path loss of the second link in the current state, and the state includes at least one of the terminal position, the working frequency of the second access network device, and the reference signal. At this time, the second access network device can obtain the downlink path loss of the second link in the following manner: the first access network device receives the downlink path loss of the second link in the current state sent by the second access network device; or, the first access network device receives the downlink path loss of the second link in different states sent by the second access network device, and determines the downlink path loss of the second link in the current state according to the current state.

Corresponding to the second implementation method on the terminal side mentioned above:

In this embodiment, the first information includes the uplink path loss of the second link. At this time, the second access network device can obtain the uplink path loss of the second link in the following manner: the first access network device receives the uplink path loss of the second link sent by the second access network device.

Corresponding to the third implementation method on the terminal side mentioned above:

In this embodiment, the first information includes the uplink target transmit power of the second link. At this time, the second access network device can obtain the uplink target transmit power of the second link in the following manner: the first access network device receives the uplink path loss of the second link sent by the second access network device; the first access network device determines the uplink target transmit power of the second link based on the uplink target receive power and the uplink path loss of the second link.

Please refer to Figure 5. A power control method provided in an embodiment of the present application, when applied to the second access network device side, corresponds to the first embodiment of the first type of implementation method on the terminal side above, and the second access network device can provide the terminal with a second access method, and the second access method includes radio frequency access. The method specifically includes:

Step 51: receiving downlink path losses of a first link and a second link measured by a terminal, wherein the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal.

Here, the first access network device and the second access network device may be access network devices of the same type or different types. For example, the first access network device may be a visible light base station, and the second access network device may be a radio frequency base station. For another example, the first access network device may be a first radio frequency base station, and the second access network device may be a second radio frequency base station, and so on.

Step 52: Based on the downlink path losses of the first link and the second link, first correlation information between the downlink path loss of the first link and the downlink path loss of the second link is obtained through training.

Step 53: Send the first association information to the first access network device.

Through the above steps, the embodiment of the present application enables the first access network device to obtain the first association information, and then provide it to the terminal to determine the uplink transmission power of the second link, so that the uplink power control of the second link can be achieved without the downlink transmission of the second link, thereby reducing the terminal power consumption and cell interference level, and improving the transmission performance and system capacity.

Referring to FIG. 6 , another power control method provided in an embodiment of the present application, when applied to the second access network device side, corresponds to the fifth embodiment of the first type of implementation on the terminal side above, and the second access network device can provide the terminal with a second access mode, and the second access mode includes radio frequency access. The method specifically includes:

Step 61, obtaining the downlink path loss of the second link in different states, where the second link is a link between the second access network device and the terminal, and the state includes at least one of the terminal position, the operating frequency of the second access network device, and a reference signal.

Step 62: Send the downlink path loss of the second link in different states or the downlink path loss of the second link in the current state to the first access network device.

Referring to FIG. 7 , another power control method provided in an embodiment of the present application, when applied to the second access network device side, corresponds to the second type of implementation or the third type of implementation on the terminal side mentioned above, and the second access network device can provide the terminal with a second type of access, and the second type of access includes radio frequency access. The method specifically includes:

Step 71: measure the uplink signal sent by the terminal to obtain the uplink path loss of the second link.

Step 72: Send the uplink path loss of the second link to the first access network device.

The above describes multiple embodiments of the present application from the perspective of each device. The following provides a flow chart of device-to-device interaction for each of the above embodiments through multiple examples. In the following example, the first access network device is a visible light base station, and the second access network device is a radio frequency base station. The first link is a visible light link between the visible light base station and the terminal, and the second link is a radio frequency link between the radio frequency base station and the terminal.

Example 1, corresponding to the first embodiment of the first type of implementation on the terminal side above:

As shown in Figure 8, the base station establishes an association relationship between visible light downlink path loss and RF downlink path loss. The first information includes a visible light downlink reference signal and an association relationship between visible light downlink path loss and RF downlink path loss. Specifically, RF downlink path loss can be a function of visible light downlink path loss.

The function may be obtained by early AI training of the radio frequency base station: after receiving the visible light downlink reference signal and the radio frequency downlink reference signal, the terminal calculates the visible light downlink path loss value and the radio frequency downlink path loss value respectively, and reports them in pairs. After receiving them, the base station side performs training to obtain the correlation between the visible light downlink path loss and the radio frequency downlink path loss, and sends this correlation to the visible light base station. The visible light base station can use notification signaling, and the terminal has the correlation:

(a) The notification signaling may be terminal-specific RRC signaling.

(b) Considering that the visible light base station is close to the terminal, it can be considered that the correlation between the visible light downlink path loss and the radio frequency downlink path loss of all terminals accessing the same visible light base station is the same, and the notification signaling can be a public RRC signaling.

The terminal receives the visible light downlink reference signal, measures the RSRP, subtracts the reference signal transmit power, calculates the visible light downlink path loss, obtains the RF downlink path loss value based on the correlation between the received visible light downlink path loss value and the RF downlink path loss value, and obtains the RF uplink transmit power based on the RF downlink path loss value. Here, the reference signal transmit power can be sent to the terminal by the visible light base station.

Example 2, corresponding to the second embodiment of the first type of implementation on the terminal side above:

As shown in FIG9 , the terminal establishes an association relationship between the visible light downlink path loss and the RF downlink path loss. The first information includes a visible light downlink reference signal. The terminal receives the visible light downlink reference signal, measures RSRP, subtracts the reference signal transmit power, calculates the visible light downlink path loss, obtains the RF downlink path loss value based on the association relationship between the received visible light downlink path loss value and the RF downlink path loss value, and obtains the RF uplink transmit power based on the RF downlink path loss value.

The correlation relationship between the visible light downlink path loss and the radio frequency downlink path loss, specifically, the radio frequency downlink path loss may be a function of the visible light downlink path loss.

The function may be obtained through early AI training of the terminal. For example, after receiving the visible light downlink reference signal and the radio frequency downlink reference signal, the terminal calculates the visible light downlink path loss value and the radio frequency downlink path loss value respectively, and performs training to obtain the correlation between the visible light downlink path loss and the radio frequency downlink path loss.

For the above-mentioned Example 1 and Example 2, the original description that can establish the correlation relationship between the visible light downlink path loss and the RF downlink path loss is as follows:

(1) For a wireless optical transmission link, the light source is a Lambertian radiation light source. In short-distance line-of-sight transmission links of visible light communication, the impact of multipath dispersion is very small. The channel model often only considers linear attenuation and delay. The link can be considered to have no frequency selectivity. The path loss is related to the square of the distance between the transmitter and the receiver:

Among them, m ₁ represents the Lambertian emission order of the beam directionality, φ = 0 is the maximum radiation power angle, m ₁ is related to the half-power half-angle φ _1/2 of the LED light emission, A _r represents the effective receiving area of the light detector, ψ represents the incident angle, T _s (ψ) represents the transmittance of the bandpass optical filter of the receiver, and g(ψ) represents the gain of the non-imaging concentrator. In other words, as long as the distance d between the transceivers is determined, the visible light downlink path loss can be determined;

In addition, simulation and measured results prove that the change trend of the Lambertian radiation model simulation results is basically consistent with the measured road loss results.

(2) For wireless transmission links, according to the path loss model of 3GPP 38.901, in the case of outdoor LOS:

PL ₁ = 20log ₁₀ (40πd _3D f _{c /} 3) + min ( ^{0.03h 1.72} , 10) log ₁₀ (d _3D )

-min(0.044h ^1.72 ,14.77)+0.002log ₁₀ (h)d _3D

PL ₂ =PL ₁ (d _BP ) + 40log ₁₀ (d _3D /d _BP )

In indoor LOS situation,

PL ₁ =32.4+21log ₁₀ (d _3D )+20log ₁₀ (f _c )

PL ₂ =32.4+40log ₁₀ (d _3D )+20log ₁₀ (f _c )-9.5log ₁₀ ((d′ _BP ) ² +(h _BS -h _UT ) ² )

It can be seen that as long as the distance d and frequency f between the transceivers are determined, the RF downlink path loss can be determined; when the terminal knows the RF frequency f, as long as the distance d between the transceivers is determined, the RF downlink path loss can be determined.

Considering that the positions of the RF base station and the visible light base station are fixed, if a coordinate system is established with the RF base station as the origin, then the coordinates of the visible light base station are fixed. For any terminal, the distance d1 to the visible light base station and the distance d2 to the RF base station must be associated with each other, and the visible light downlink path loss and the RF downlink path loss are only related to d1 and d2, so the association between the visible light downlink path loss and the RF downlink path loss must be established. Without loss of generality, the terminal can also determine a RF downlink path loss through multiple visible light path losses.

When the visible light is blocked, the terminal considers the current transmission invalid and does not use the visible light downlink path loss and RF downlink path loss as samples; or the terminal reports the signal quality of the visible light, and the RF base station directly turns on the RF downlink and determines the RF uplink transmission power directly based on the RF downlink path loss.

Example 3, corresponding to the third embodiment of the first type of implementation on the terminal side above:

This example is shown in Figure 10, where the path loss from the radio frequency base station to the visible light base station is approximately the downlink path loss from the radio frequency base station to the terminal. The first information includes a path loss value associated with the visible light base station ID, and the path loss value associated with the visible light base station ID includes a path loss value from the radio frequency base station to the visible light base station, and the visible light base station has a measurement function.

The terminal receives the first information, obtains a radio frequency downlink path loss value, and obtains a radio frequency uplink transmission power based on the radio frequency downlink path loss value.

Considering that the visible light base station is close to the terminal, the RF downlink path loss of all terminals accessing the same visible light base station is the same, which is equal to the path loss value from the RF base station to the visible light base station. The first information can be a public RRC signaling notification.

Example 4 corresponds to the fourth embodiment of the first type of implementation on the terminal side above:

As shown in Figure 11, the downlink path loss from the radio frequency base station to the terminal is the path loss from the radio frequency base station to the visible light base station + the visible light downlink path loss. The first information includes a visible light downlink reference signal and a path loss value associated with the visible light base station ID, the path loss value associated with the visible light base station ID includes a path loss value from the radio frequency base station to the visible light base station, and the visible light base station has a measurement function.

The terminal receives the visible light downlink reference signal, measures the RSRP, subtracts the reference signal transmit power, calculates the visible light downlink path loss, adds the received path loss value associated with the visible light base station ID to the visible light downlink path loss, and obtains the RF downlink path loss value. Based on the RF downlink path loss value, the RF uplink transmit power is obtained.

Considering that the visible light base station is close to the terminal, the RF downlink path loss of all terminals accessing the same visible light base station is the same, which is equal to the path loss value from the RF base station to the visible light base station. The first information can be a public RRC signaling notification.

Example 5, corresponding to the fifth embodiment of the first type of implementation on the terminal side above:

As shown in FIG12, the terminal determines the RF downlink path loss based on the positioning server. The first information includes RF downlink path loss values at different frequencies and different reference signals. The terminal receives the first information, obtains the RF downlink path loss value, and obtains the RF uplink transmission power based on the RF downlink path loss value.

Assume that the positioning server can locate the terminal through the visible light base station. According to the different locations of the terminal, there may be RF downlink path loss values under different frequencies and different reference signals at different locations, which will be notified to the visible light base station. The visible light base station sends it to the terminal through UE-specific RRC signaling or system message or cell-specific RRC signaling.

Example 6 corresponds to the second implementation method on the terminal side mentioned above:

As shown in FIG13, the base terminal determines the RF uplink path loss value based on the first information, and determines the RF uplink transmit power based on the RF uplink path loss value. The first information includes the RF uplink path loss value. The terminal receives visible light downlink data or control information, sends PUCCH/PUSCH/SRS/PRACH according to the maximum uplink transmit power or the preset transmit power, and the RF base station calculates the RF uplink path loss and sends it to the visible light base station, which then sends it to the terminal.

Example 7 corresponds to the third implementation method on the terminal side mentioned above:

As shown in FIG14, the terminal directly determines the RF uplink transmit power based on the first information. The first information includes the RF uplink target receive power. The terminal receives visible light downlink data or control information, sends PUCCH/PUSCH/SRS/PRACH according to the maximum uplink transmit power or the preset transmit power, and the RF base station calculates the RF uplink path loss and sends it to the visible light base station. The visible light base station adjusts the RF uplink target receive power and sends it to the terminal.

It should also be noted that Examples 1-5 are all applicable to uplink power control of PUCCH/PUSCH/SRS/PRACH; Examples 6-7 are only applicable to uplink power control of PUCCH/PUSCH/SRS, and not to PRACH, because PRACH carries a preamble sequence and has no reference signal, and the uplink path loss cannot be calculated.

The above describes various methods of the embodiments of the present application. The following further provides devices for implementing the above methods.

Referring to FIG. 15 , an embodiment of the present application further provides a terminal, including:

A first receiving module 1501 is configured to receive first information through a first link, where the first link is a link between the terminal and a first access network device;

The determination module 1502 is used to determine the uplink transmission power of the second link based on the first information, where the second link is a link between the terminal and a second access network device.

Optionally, the first access network device provides a first access mode to the terminal, and the second access network device provides a second access mode to the terminal, and the first mode is different from the second mode.

Optionally, the first access mode includes optical communication access, and the second access mode includes radio frequency access.

Optionally, the above determination module is further used to:

Determine a downlink path loss of a second link based on the first information;

Based on the downlink path loss of the second link, an uplink transmission power of the second link is determined.

Optionally, the first information includes a first downlink reference signal and first association information, where the first association information is association information between a downlink path loss of the first link and a downlink path loss of the second link; the above-mentioned determination module is further used to:

Measuring a first downlink reference signal to obtain a downlink path loss of the first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the first association information.

Optionally, the terminal further includes:

The first acquisition module is used to measure the downlink reference signal sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link; the downlink path loss of the first link and the second link is sent to the second access network device, so that the second access network device can train and obtain the first association information based on the downlink path loss of the first link and the second link.

Optionally, the first information includes a first downlink reference signal; and the determination module is further configured to:

measuring the first downlink reference signal to obtain a downlink path loss of the first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the second association information, wherein the second association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the terminal further includes:

A second obtaining module is used to measure the downlink reference signals sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link;

The second association information is obtained by training based on downlink path losses of the first link and the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device; and the above-mentioned determination module is further used to:

The path loss from the second access network device to the first access network device included in the first information is determined as the downlink path loss of the second link.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device; the above-mentioned determination module is further used to:

measuring the first downlink reference signal to obtain a downlink path loss of the first link;

The sum of the downlink path loss of the first link and the path loss from the second access network device to the first access network device is determined as the downlink path loss of the second link.

Optionally, the first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal position, an operating frequency point of the second access network device, and a reference signal; the above-mentioned determination module is further used to:

The downlink path loss of the second link in the current state is determined as the downlink path loss of the second link.

Optionally, the above determination module is further used to:

Determine an uplink path loss of a second link based on the first information;

Based on the uplink path loss of the second link, an uplink transmit power of the second link is determined.

Optionally, the first information includes an uplink path loss of the second link; and the terminal further includes:

The third acquisition module is used to:

receiving a first indication via a first link;

According to the first indication, an uplink signal is sent on the second link using a maximum uplink transmission power or a preset transmission power, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device.

Optionally, the first information includes an uplink target transmit power of the second link; and the above-mentioned determination module is further used to: determine the uplink target transmit power of the second link as the uplink transmit power of the second link.

Optionally, the terminal further includes:

The fourth acquisition module is used to:

receiving a second indication via the first link;

According to the second indication, an uplink signal is sent on the second link using the maximum uplink transmit power or the preset transmit power, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device, thereby enabling the first access network device to determine the uplink target transmit power of the second link based on the uplink path loss of the second link and the uplink target receive power of the second link.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the terminal side, and the implementation methods in the above embodiments are applicable to the embodiments of the device, and can also achieve the same technical effect. The above device provided in the embodiment of the present application can implement all the method steps implemented in the above method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be specifically described here.

Please refer to FIG. 16 , an embodiment of the present application further provides a terminal 1600 , including: a transceiver 1601 and a processor 1602 ;

The transceiver 1601 is configured to receive first information through a first link, where the first link is a link between the terminal and a first access network device;

The processor 1602 is configured to determine, based on the first information, an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

Optionally, the first access network device provides a first access mode to the terminal, and the second access network device provides a second access mode to the terminal, and the first mode is different from the second mode.

Optionally, the first access mode includes optical communication access, and the second access mode includes radio frequency access.

Optionally, the processor is further configured to:

Determine a downlink path loss of a second link based on the first information;

Based on the downlink path loss of the second link, an uplink transmission power of the second link is determined.

Optionally, the first information includes a first downlink reference signal and first association information, where the first association information is association information between a downlink path loss of the first link and a downlink path loss of the second link; the above-mentioned determination module is further used to:

The terminal measures a first downlink reference signal to obtain a downlink path loss of a first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the first association information.

Optionally, the processor is also used to: measure the downlink reference signal sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link; send the downlink path loss of the first link and the second link to the second access network device, so that the second access network device can train to obtain the first association information based on the downlink path loss of the first link and the second link.

Optionally, the first information includes a first downlink reference signal; Optionally, the processor is further configured to:

measuring the first downlink reference signal to obtain a downlink path loss of the first link;

The downlink path loss of the second link is determined according to the downlink path loss of the first link and the second association information, wherein the second association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the processor is further used to: measure the downlink reference signals sent by the first access network device and the second access network device to obtain the downlink path loss of the first link and the second link; and train to obtain the second association information based on the downlink path loss of the first link and the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device; and the processor is further configured to:

The path loss from the second access network device to the first access network device included in the first information is determined as the downlink path loss of the second link.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device; and the processor is further configured to:

measuring the first downlink reference signal to obtain a downlink path loss of the first link;

The sum of the downlink path loss of the first link and the path loss from the second access network device to the first access network device is determined as the downlink path loss of the second link.

Optionally, the first information includes a downlink path loss of the second link in a current state, and the state includes at least one of a terminal position, an operating frequency of a second access network device, and a reference signal; the processor is further used to: determine the downlink path loss of the second link in the current state as the downlink path loss of the second link.

Optionally, the processor is further used to: determine the uplink path loss of the second link based on the first information; and determine the uplink transmission power of the second link based on the uplink path loss of the second link.

Optionally, the first information includes an uplink path loss of the second link; the processor is further used to: receive a first indication through the first link; and according to the first indication, send an uplink signal on the second link using a maximum uplink transmit power or a preset transmit power, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device.

Optionally, the first information includes an uplink target transmit power of the second link; and the processor is further used to: determine the uplink target transmit power of the second link as the uplink transmit power of the second link.

Optionally, the processor is further used to: receive a second indication through the first link; and according to the second indication, send an uplink signal on the second link using a maximum uplink transmit power or a preset transmit power, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device, thereby enabling the first access network device to determine the uplink target transmit power of the second link based on the uplink path loss of the second link and the uplink target receive power of the second link.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the terminal side, and the implementation methods in the above embodiments are applicable to the embodiments of the device, and can also achieve the same technical effect. The above device provided in the embodiment of the present application can implement all the method steps implemented in the above method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be specifically described here.

Referring to FIG. 17 , an embodiment of the present application further provides a first access network device 1700, including:

The first sending module 1701 is used to send first information through a first link, where the first link is a link between the first access network device and the terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

Optionally, the first access device provides a first access mode to the terminal, and the first access mode includes optical communication access.

Optionally, the first information includes a first downlink reference signal and first association information, and the first association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the above device also includes:

The first acquisition module is used to send a downlink reference signal to the terminal; receive the first association information sent by the second access network device, where the first association information is obtained by the second access network device based on the downlink path loss training of the first link and the second link sent by the terminal.

Optionally, the first information includes a first downlink reference signal; and the above device further includes:

The second acquisition module is used to send a downlink reference signal to the terminal so that the terminal measures the downlink path loss of the first link and the second link, and based on the downlink path loss of the first link and the second link, trains to obtain second association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device; the above device also includes:

The third obtaining module is used to measure the reference signal sent by the second access network device to obtain the path loss from the second access network device to the first access network device.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device; the above device also includes:

The fourth acquisition module is used to measure the reference signal sent by the second access network device to obtain the path loss from the second access network device to the first access network device.

Optionally, the first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal;

The above equipment also includes:

The fifth acquisition module is used to receive the downlink path loss of the second link in the current state sent by the second access network device; or, receive the downlink path loss of the second link in different states sent by the second access network device, and determine the downlink path loss of the second link in the current state according to the current state.

Optionally, the first information includes an uplink path loss of the second link; and the device further includes:

The sixth obtaining module is used to receive the uplink path loss of the second link sent by the second access network device.

Optionally, the first information includes an uplink target transmit power of the second link; and the device further includes:

The seventh acquisition module is used to receive the uplink path loss of the second link sent by the second access network device; based on the uplink target received power and the uplink path loss of the second link, determine the uplink target transmit power of the second link.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the first access network device side, and the implementation methods in the above embodiments are all applicable to the embodiments of the device, and can also achieve the same technical effect. The above device provided in the embodiment of the present application can implement all the method steps implemented in the above method embodiment, and can achieve the same technical effect, and the parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be specifically described here.

Please refer to FIG. 18 , an embodiment of the present application further provides a network device 1800 , including: a transceiver 1801 and a processor 1802 ;

The transceiver 1801 is used to send first information through a first link, where the first link is a link between the first access network device and the terminal, and the first information is used by the terminal to determine the uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device.

Optionally, the first access device provides a first access mode to the terminal, and the first access mode includes optical communication access.

Optionally, the first information includes a first downlink reference signal and first association information, and the first association information is association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the transceiver is also used to send a downlink reference signal to the terminal; receive the first association information sent by the second access network device, where the first association information is obtained by the second access network device based on the downlink path loss training of the first link and the second link sent by the terminal.

Optionally, the first information includes a first downlink reference signal; the transceiver is also used to send a downlink reference signal to the terminal so that the terminal measures the downlink path loss of the first link and the second link, and based on the downlink path loss of the first link and the second link, trains to obtain second association information between the downlink path loss of the first link and the downlink path loss of the second link.

Optionally, the first information includes a path loss from the second access network device to the first access network device; and the processor is used to measure a reference signal sent by the second access network device to obtain a path loss from the second access network device to the first access network device.

Optionally, the first information includes a first downlink reference signal and a path loss from the second access network device to the first access network device; the processor is used to measure the reference signal sent by the second access network device to obtain the path loss from the second access network device to the first access network device.

Optionally, the first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal;

The processor is used to receive the downlink path loss of the second link in the current state sent by the second access network device; or, receive the downlink path loss of the second link in different states sent by the second access network device, and determine the downlink path loss of the second link in the current state according to the current state.

Optionally, the first information includes an uplink path loss of the second link; and the processor is used to receive the uplink path loss of the second link sent by the second access network device.

Optionally, the first information includes an uplink target transmission power of the second link; the processor is used to receive an uplink path loss of the second link sent by the second access network device; and determine the uplink target transmission power of the second link based on the uplink target receiving power and the uplink path loss of the second link.

It should be noted that the device in this embodiment is a device corresponding to the method applied to the first access network device, and the implementation methods in the above embodiments are all applicable to the embodiments of the device, and can also achieve the same technical effect. The above device provided in the embodiment of the present application can implement all the method steps implemented in the above method embodiment, and can achieve the same technical effect, and the parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be specifically described here.

Referring to FIG. 19 , an embodiment of the present application further provides a second access network device, including:

A receiving module 1901 receives downlink path losses of a first link and a second link measured by a terminal, where the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal;

A training module 1902 is configured to obtain, based on the downlink path losses of the first link and the second link, first association information between the downlink path loss of the first link and the downlink path loss of the second link through training;

The sending module 1903 is used to send the first association information to the first access network device.

Optionally, the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access.

Referring to FIG. 20 , the embodiment of the present application further provides another second access network device, including:

An obtaining module 2001 is configured to obtain a downlink path loss of a second link in different states, where the second link is a link between a second access network device and the terminal, and the state includes at least one of a terminal position, an operating frequency of the second access network device, and a reference signal;

The sending module 2002 is used to send the downlink path loss of the second link in different states or the downlink path loss of the second link in the current state to the first access network device.

Referring to FIG. 21 , the embodiment of the present application further provides another second access network device, including:

The measuring module 2101 is configured to measure an uplink signal sent by the terminal to obtain an uplink path loss of the second link;

The sending module 2102 is used to send the uplink path loss of the second link to the first access network device.

Optionally, the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access.

Please refer to Figure 22. An embodiment of the present application also provides a terminal 2200, including a processor 2201, a memory 2202, and a computer program stored in the memory 2202 and executable on the processor 2201. When the computer program is executed by the processor 2201, the various processes of the power control method embodiment executed by the terminal are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

Please refer to Figure 23. An embodiment of the present application also provides a first access network device 2300, including a processor 2301, a memory 2302, and a computer program stored in the memory 2302 and executable on the processor 2301. When the computer program is executed by the processor 2301, the various processes of the power control method embodiment performed by the first access network device are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

Please refer to Figure 24. An embodiment of the present application also provides a network device 2400, including a processor 2401, a memory 2402, and a computer program stored in the memory 2402 and executable on the processor 2401. When the computer program is executed by the processor 2401, the various processes of the power control method embodiment executed by the second access network device are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned power control method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this article, the terms "include", "include" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims (39)

1. A power control method, applied to a terminal, comprising: receiving first information through a first link, where the first link is a link between the terminal and a first access network device; Based on the first information, an uplink transmission power of a second link is determined, where the second link is a link between the terminal and a second access network device. 2. The method according to claim 1 is characterized in that the first access network device provides a first access mode to the terminal, and the second access network device provides a second access mode to the terminal, and the first mode is different from the second mode. 3. The method according to claim 2 is characterized in that the first access mode includes optical communication access, and the second access mode includes radio frequency access. 4. The method according to claim 1, wherein determining the uplink transmission power of the second link based on the first information comprises: Determine a downlink path loss of a second link based on the first information; Based on the downlink path loss of the second link, an uplink transmission power of the second link is determined. 5. The method according to claim 4, characterized in that The first information includes a first downlink reference signal and first association information, wherein the first association information is association information between a downlink path loss of the first link and a downlink path loss of the second link; The determining, based on the first information, a downlink path loss of the second link includes: The terminal measures a first downlink reference signal to obtain a downlink path loss of a first link; The downlink path loss of the second link is determined according to the downlink path loss of the first link and the first association information. 6. The method according to claim 5, characterized in that the obtaining of the first association information comprises: The terminal measures the downlink reference signals sent by the first access network device and the second access network device to obtain downlink path losses of the first link and the second link; The terminal sends the downlink path losses of the first link and the second link to the second access network device, so that the second access network device obtains the first association information through training based on the downlink path losses of the first link and the second link. 7. The method according to claim 4, characterized in that The first information includes a first downlink reference signal; The determining, based on the first information, a downlink path loss of the second link includes: The terminal measures the first downlink reference signal to obtain a downlink path loss of the first link; The downlink path loss of the second link is determined according to the downlink path loss of the first link and the second association information, wherein the second association information is association information between the downlink path loss of the first link and the downlink path loss of the second link. 8. The method according to claim 7, wherein obtaining the second association information comprises: The terminal measures the downlink reference signals sent by the first access network device and the second access network device to obtain downlink path losses of the first link and the second link; The terminal obtains the second association information through training based on downlink path losses of the first link and the second link. 9. The method according to claim 4, characterized in that The first information includes a path loss from the second access network device to the first access network device; The determining, based on the first information, a downlink path loss of the second link includes: The path loss from the second access network device to the first access network device included in the first information is determined as the downlink path loss of the second link. 10. The method according to claim 4, characterized in that The first information includes a first downlink reference signal and a path loss from a second access network device to the first access network device; The determining, based on the first information, a downlink path loss of the second link includes: The terminal measures the first downlink reference signal to obtain a downlink path loss of the first link; The sum of the downlink path loss of the first link and the path loss from the second access network device to the first access network device is determined as the downlink path loss of the second link. 11. The method according to claim 4, characterized in that The first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal; The determining, based on the first information, a downlink path loss of the second link includes: The terminal determines the downlink path loss of the second link in the current state as the downlink path loss of the second link. 12. The method according to claim 1, wherein determining the uplink transmission power of the second link based on the first information comprises: Determine an uplink path loss of a second link based on the first information; Based on the uplink path loss of the second link, an uplink transmit power of the second link is determined. 13. The method according to claim 12, characterized in that The first information includes an uplink path loss of the second link; The obtaining of the uplink path loss of the second link includes: The terminal receives a first indication through a first link; The terminal transmits an uplink signal on the second link using a maximum uplink transmit power or a preset transmit power according to the first indication, so that the second access network device measures an uplink path loss of the second link and transmits it to the first access network device. 14. The method according to claim 1, characterized in that The first information includes an uplink target transmit power of the second link; The determining the uplink transmission power of the second link based on the first information includes: determining the uplink target transmission power of the second link as the uplink transmission power of the second link. 15. The method according to claim 14, characterized in that The obtaining of the uplink target transmission power of the second link includes: The terminal receives a second indication through the first link; According to the second indication, the terminal uses the maximum uplink transmit power or the preset transmit power to transmit an uplink signal on the second link, so that the second access network device measures the uplink path loss of the second link and sends it to the first access network device, thereby enabling the first access network device to determine the uplink target transmit power of the second link according to the uplink path loss of the second link and the uplink target receive power of the second link. 16. A power control method, applied to a first access network device, comprising: The first information is sent via a first link, where the first link is a link between the first access network device and a terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device. 17. The method according to claim 16 is characterized in that the first access device provides a first access mode to the terminal, and the first access mode includes optical communication access. 18. The method according to claim 16, characterized in that The first information includes a first downlink reference signal and first association information, where the first association information is association information between a downlink path loss of the first link and a downlink path loss of the second link. 19. The method according to claim 18, wherein obtaining the first association information comprises: The first access network device and the second access network device respectively send a downlink reference signal to the terminal; The first access network device receives the first association information sent by the second access network device, where the first association information is obtained by the second access network device based on downlink path loss training of the first link and the second link sent by the terminal. 20. The method according to claim 16, wherein the first information comprises a first downlink reference signal; the method further comprises: The first access network device and the second access network device respectively send downlink reference signals to the terminal so that the terminal measures the downlink path loss of the first link and the second link, and based on the downlink path loss of the first link and the second link, trains to obtain second association information between the downlink path loss of the first link and the downlink path loss of the second link. 21. The method according to claim 16, characterized in that The first information includes a path loss from the second access network device to the first access network device; The obtaining of the path loss from the second access network device to the first access network device includes: The first access network device measures a reference signal sent by the second access network device to obtain a path loss from the second access network device to the first access network device. 22. The method according to claim 16, characterized in that The first information includes a first downlink reference signal and a path loss from a second access network device to the first access network device; The obtaining of the path loss from the second access network device to the first access network device includes: The first access network device measures a reference signal sent by the second access network device to obtain a path loss from the second access network device to the first access network device. 23. The method according to claim 16, characterized in that The first information includes a downlink path loss of the second link in a current state, where the state includes at least one of a terminal location, an operating frequency point of the second access network device, and a reference signal; The obtaining of the downlink path loss of the second link includes: The first access network device receives the downlink path loss of the second link in the current state sent by the second access network device; or, the first access network device receives the downlink path loss of the second link in different states sent by the second access network device, and determines the downlink path loss of the second link in the current state according to the current state. 24. The method according to claim 16, characterized in that The first information includes an uplink path loss of the second link; The obtaining of the uplink path loss of the second link includes: The first access network device receives the uplink path loss of the second link sent by the second access network device. 25. The method according to claim 16, characterized in that The first information includes an uplink target transmit power of the second link; The obtaining of the uplink target transmission power of the second link includes: The first access network device receives an uplink path loss of a second link sent by the second access network device; The first access network device determines the uplink target transmission power of the second link based on the uplink target reception power and the uplink path loss of the second link. 26. A power control method, applied to a second access network device, comprising: Receiving downlink path losses of a first link and a second link measured by a terminal, where the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal; Based on the downlink path loss of the first link and the second link, first association information between the downlink path loss of the first link and the downlink path loss of the second link is obtained by training; The first association information is sent to the first access network device. 27. A power control method, applied to a second access network device, comprising: Obtaining a downlink path loss of a second link in different states, where the second link is a link between a second access network device and a terminal, and the state includes at least one of a terminal position, an operating frequency of the second access network device, and a reference signal; The downlink path loss of the second link in different states or the downlink path loss of the second link in the current state is sent to the first access network device. 28. The method according to claim 27 is characterized in that the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access. 29. A power control method, applied to a second access network device, comprising: Measuring an uplink signal sent by the terminal to obtain an uplink path loss of a second link, where the second link is a link between the terminal and a second access network device; The uplink path loss of the second link is sent to the first access network device. 30. The method according to claim 29, characterized in that the second access network device provides a second access mode to the terminal, and the second access mode includes radio frequency access. 31. A terminal, comprising a transceiver and a processor, wherein: The transceiver is configured to receive first information through a first link, where the first link is a link between the terminal and a first access network device; The processor is used to determine the uplink transmission power of a second link based on the first information, where the second link is a link between the terminal and a second access network device. 32. A terminal, characterized in that it comprises: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the method according to any one of claims 1 to 15 are implemented. 33. A first access network device, comprising a transceiver and a processor, wherein: The transceiver is used to send first information through a first link, where the first link is a link between the first access network device and a terminal, and the first information is used by the terminal to determine an uplink transmission power of a second link, where the second link is a link between the terminal and a second access network device. 34. A first access network device, characterized in that it comprises: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in any one of claims 16 to 25. 35. A second access network device, comprising a transceiver and a processor, wherein: The transceiver is configured to receive downlink path losses of a first link and a second link measured by a terminal, wherein the first link is a link between a first access network device and the terminal, and the second link is a link between a second access network device and the terminal; The processor is configured to obtain, by training based on the downlink path losses of the first link and the second link, first association information between the downlink path loss of the first link and the downlink path loss of the second link. 36. A second access network device, comprising a transceiver and a processor, wherein: The processor is configured to obtain a downlink path loss of a second link in different states, where the second link is a link between a second access network device and a terminal, and the state includes at least one of a terminal position, an operating frequency point of the second access network device, and a reference signal; The transceiver is used to send the downlink path loss of the second link in different states or the downlink path loss of the second link in the current state to the first access network device. 37. A second access network device, comprising a transceiver and a processor, wherein: The processor is configured to measure an uplink signal sent by the terminal to obtain an uplink path loss of a second link, where the second link is a link between the terminal and a second access network device; The transceiver is used to send the uplink path loss of the second link to the first access network device. 38. A second access network device, characterized in that it comprises: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in any one of claims 26 to 30. 39. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 30 are implemented.