CN111491275A

CN111491275A - Power control method, device, storage medium and electronic equipment

Info

Publication number: CN111491275A
Application number: CN201910082451.7A
Authority: CN
Inventors: 许百成; 袁亮; 邓祝明
Original assignee: Beijing Xiaomi Pinecone Electronic Co Ltd
Current assignee: Beijing Xiaomi Pinecone Electronic Co Ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2020-08-04
Anticipated expiration: 2039-01-28
Also published as: CN111491275B

Abstract

The present disclosure relates to a power control method, apparatus, storage medium, and electronic device to quickly implement link reestablishment when a device-to-device D2D link is disconnected. The power control method comprises the following steps: when the device-to-device D2D link is broken, ceasing to transmit data channels, the data channels including a physical downlink control channel and a physical downlink shared channel; determining a total transmit power of a reference device in the D2D link; and allocating the total transmission power for transmission of the synchronization signal, the reference signal and the broadcast signal.

Description

Power control method, device, storage medium and electronic equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a power control method, apparatus, storage medium, and electronic device.

Background

D2D (Device to Device) is a system for direct communication between devices, and is widely used in interphones, unmanned planes with image transmission functions, and the like. In the D2D system, since the transmission of the wireless signal is attenuated with the increase of the distance, the application of the D2D system requires that the communication link cannot be maintained if the communication signal is attenuated to below the demodulation threshold within a certain distance range and exceeds the certain distance range. For example, after the unmanned aerial vehicle flies out of a certain distance range, the unmanned aerial vehicle can break a link with the remote controller, and under the condition, the unmanned aerial vehicle can trigger the return flight on the one hand and can establish connection with the remote controller again on the other hand.

In the related art, when the D2D system performs link re-establishment, a slave device in the D2D system first detects a synchronization signal to regain synchronization, then reads a MIB (Master Information Block) in a broadcast channel, and finally completes link re-establishment through random access and signaling interaction. However, when the D2D system is broken, the communication signal transmitted by the reference device is very weak due to the distance limitation, and therefore, it is difficult for the slave device to quickly and accurately reacquire synchronization and successfully read the broadcast information.

Disclosure of Invention

The present disclosure provides a power control method, apparatus, storage medium, and electronic device to quickly implement link reestablishment when a device-to-device D2D link is disconnected.

To achieve the above object, in a first aspect, the present disclosure provides a power control method, the method including:

when the device-to-device D2D link is broken, ceasing to transmit data channels, the data channels including a physical downlink control channel and a physical downlink shared channel;

determining a total transmit power of a reference device in the D2D link;

and allocating the total transmission power for transmission of the synchronization signal, the reference signal and the broadcast signal.

Optionally, the allocating the total transmission power for transmission of a synchronization signal, a reference signal and a broadcast signal includes:

determining whether a modulation symbol is present in the D2D link and comprises at least two of the synchronization signal, the reference signal, and the broadcast signal;

and when the modulation symbol comprises the at least two communication signals, distributing the total transmission power for the transmission of the at least two communication signals according to a preset priority of the at least two communication signals, wherein the preset priority is used for representing the sequence of the transmission power of the distributed communication signals.

Optionally, the method further comprises:

and when the preset priorities of the at least two communication signals are the same, distributing the total transmission power for the transmission of the at least two communication signals according to the occupation ratio of the at least two communication signals in the transmission signals.

Optionally, the method further comprises:

and determining the preset priority of the synchronization signal, the reference signal and the broadcast signal according to the sequence of receiving the synchronization signal, the reference signal and the broadcast signal by the slave device in the D2D link in the process of establishing the link.

Optionally, the method further comprises:

determining whether an access signal transmitted by a slave device in the D2D link is received;

when receiving an access signal sent by the slave device, adjusting the sending power of the synchronization signal to a first preset power, sending the sending power of the reference signal to a second preset power, and adjusting the sending power of the broadcast signal to a third preset power.

In a second aspect, the present disclosure also provides a power control apparatus, the apparatus comprising:

a transmit stop module to stop transmitting data channels when a device-to-device D2D link is broken, the data channels including a physical downlink control channel and a physical downlink shared channel;

an obtaining module, configured to obtain total transmission power of reference devices in the D2D link;

a first allocating module, configured to allocate the total transmission power for transmission of a synchronization signal, a reference signal, and a broadcast signal.

Optionally, the first distribution module is configured to:

Optionally, the apparatus further comprises:

and the first determining module is used for allocating the total transmission power for the transmission of the at least two communication signals according to the proportion of the at least two communication signals in the transmission signals when the preset priorities of the at least two communication signals are the same.

Optionally, the apparatus further comprises:

and the second determining module is used for determining the preset priority of the synchronization signal, the reference signal and the broadcast signal according to the sequence of receiving the synchronization signal, the reference signal and the broadcast signal by the slave device in the D2D link in the link establishing process.

Optionally, the apparatus further comprises:

a third determining module, configured to determine whether an access signal sent by a slave device in the D2D link is received;

and the adjusting module is used for adjusting the power for sending the synchronous signal to a first preset power, sending the power for sending the reference signal to a second preset power and adjusting the power for sending the broadcast signal to a third preset power when receiving the access signal sent by the slave equipment.

In a third aspect, the present disclosure also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any one of the first aspect.

In a fourth aspect, the present disclosure also provides an electronic device, including:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to implement the steps of the method of any of the first aspects.

Through the technical scheme, when the D2D link is disconnected, the data channel is stopped, and then the total transmission power of the reference equipment in the D2D link is allocated for the transmission of the synchronization signal, the reference signal and the broadcast signal. That is, the power control method of the present disclosure may control the reference device to stop transmitting the data signal when the D2D system generates a chain break, and then use all power of the reference device to transmit the most important synchronization signal, reference signal and broadcast signal in the D2D chain break reestablishment process, so that the slave device may accurately reacquire synchronization and successfully read broadcast information, thereby implementing fast reestablishment of the D2D link.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a flow chart illustrating a method of power control according to an exemplary embodiment of the present disclosure;

FIG. 2 is a flow chart illustrating a method of power control according to another exemplary embodiment of the present disclosure;

FIG. 3 is a block diagram illustrating a power control apparatus according to an exemplary embodiment of the present disclosure;

fig. 4 is a block diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

D2D (Device to Device) is a system for direct communication between devices, and is widely used in interphones, unmanned planes with image transmission functions, and the like. In the D2D system, since the transmission of the communication signal is attenuated with the increase of the distance, the application of the D2D system needs to maintain the communication link if the communication signal is attenuated to be below the demodulation threshold within a certain distance range and exceeds the certain distance range. For example, after the unmanned aerial vehicle flies out of a certain distance range, the unmanned aerial vehicle can break a link with the remote controller, and under the condition, the unmanned aerial vehicle can trigger the return flight on the one hand and can establish connection with the remote controller again on the other hand.

In the related art, when the D2D system provides a reference timing device and other devices (such as a remote controller in drone communication) are referred to as slave devices, when the D2D system performs link re-establishment, the slave devices first detect a synchronization signal to regain synchronization, then read a MIB (Master Information Block) in a broadcast channel, and finally complete link re-establishment through random access and signaling interaction. However, when the D2D system is broken, the communication signal transmitted by the base station device is very weak due to the distance limitation, and therefore, it is difficult for the slave device to quickly and accurately reacquire synchronization and successfully read the broadcast information.

In order to solve the above problems, the present disclosure provides a power method, an apparatus, a storage medium, and an electronic device to quickly implement link reestablishment when a D2D system generates a link failure.

Fig. 1 is a flowchart illustrating a power control method according to an exemplary embodiment of the present disclosure, and referring to fig. 1, the power control method may include the steps of:

step S101, when the device-to-device D2D link is disconnected, stopping transmitting data channels, the data channels including a physical downlink control channel and a physical downlink shared channel.

For example, the D2D link disconnection may be a case where the communication signal is interrupted due to a limitation of a distance, or may be a case where the D2D link is disconnected due to a weak signal, such as an interruption of the communication signal due to an obstruction of an obstacle, which is not limited by the embodiment of the present disclosure.

And step S102, determining the total transmission power of the reference equipment in the D2D link.

For example, the total transmission power may be a fixed power value obtained directly from the reference device, or may be a power value that varies with the transmitted communication signal. It should be appreciated that since the maximum value of the total transmission power is fixed, the total transmission power of the reference device may be fixed if communication is performed at the maximum total transmission power.

Step S103, the total transmission power is distributed and used for transmitting the synchronous signal, the reference signal and the broadcast signal.

The synchronization signals may include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), among others.

By the power control method in the embodiment of the disclosure, when the D2D link is disconnected, after the data signal is discontinued, the total transmission power of the reference device may be used to transmit the most important synchronization signal (PSS/SSS), reference signal (CRS) and broadcast signal (PBCH) in the process of reestablishing the broken link, so as to quickly reestablish the D2D link.

In a possible manner, it may also be determined whether there is one modulation symbol in the D2D link that includes at least two communication signals of a synchronization signal, a reference signal, and a broadcast signal, and when there is one modulation symbol that includes at least two communication signals, the total transmission power is allocated for transmission of the at least two communication signals according to a preset priority of the at least two communication signals, where the preset priority is used to characterize a precedence order of transmission powers of the allocated communication signals.

For example, when OFDM (Orthogonal Frequency division multiplexing) is used in the D2D system, the modulation symbols may be OFDM symbols. It should be understood that when other modulation techniques are used in the D2D system, the modulation symbol may be a transmission symbol corresponding to the modulation technique, which is not limited by the embodiments of the present disclosure.

For example, the preset priority may be used to represent a sequence of allocating the transmission power of the communication signal, and when the preset priority of the communication signal is higher, the transmission power corresponding to the communication signal may be allocated first, whereas when the preset priority of the communication signal is lower, the transmission power corresponding to the communication signal may be allocated later.

For example, the preset priority may be represented by letters or numbers, for example, the preset priority of the communication signal may be represented by numbers 1 to 9, and the preset priority of the communication signal may be represented by numbers 1 to 9, respectively, and the preset priority decreases sequentially, and the embodiment of the present disclosure is not limited to the specific setting manner and content of the preset priority.

In one possible approach, the preset priorities of the synchronization signal, the reference signal and the broadcast signal may be determined according to the order in which the slave devices in the D2D link receive the synchronization signal, the reference signal and the broadcast signal during the link establishment process.

Illustratively, the preset priorities of the synchronization signal, the reference signal and the broadcast signal may be determined according to the sequence in which the slave device in the D2D link receives the synchronization signal, the reference signal and the broadcast signal during the link establishment process. For example, in the process of establishing the link, the higher the slave device accesses a communication signal, the higher the preset priority of the communication signal may be, and conversely, the lower the slave device accesses a communication signal, the lower the preset priority of the communication signal may be. For example, in the D2D link establishment process, the order in which the slave device receives the communication signals is: the main synchronization signal, the auxiliary synchronization signal, and the broadcast signal, it may be determined that the preset priority of the main synchronization signal is higher than the auxiliary synchronization signal, and meanwhile, the preset priority of the auxiliary synchronization signal is higher than the broadcast signal.

Through the mode, the priority can be set for the synchronous signal, the reference signal and the broadcast signal, and then the total transmission power of the reference equipment is distributed to be used for transmitting the synchronous signal, the reference signal and the broadcast signal according to the priority, so that the accuracy of power control is ensured, and the reconstruction process of the D2D link is accelerated.

It should be appreciated that when the preset priorities of at least two communication signals are different, the total transmission power may be allocated for the transmission of the at least two communication signals according to the preset priorities in the manner described above. However, if the preset priorities of at least two communication signals are the same, the total transmission power may be allocated for the transmission of the at least two communication signals according to other allocation strategies.

In one possible approach, when the preset priorities of the at least two communication signals are the same, the total transmission power may be allocated for the transmission of the at least two communication signals according to the occupation ratios of the at least two communication signals in the transmission signals.

It should be understood that the transmitted signal is the signal transmitted by the reference device to the slave device in the D2D link. If the communication signal has a higher occupancy in the transmission signal, a larger transmission power may be allocated to the communication signal, and conversely, a smaller transmission power may be allocated to the communication signal.

Illustratively, when the D2D system uses OFDM, the occupancy of the communication signal in the transmitted signal may be represented by the number of subcarriers. In this case, when the preset priorities of the at least two communication signals are the same, the total transmission power may be allocated for the transmission of the at least two communication signals according to the number of subcarriers respectively corresponding to the at least two communication signals.

For example, in a D2D system using OFDM, symbol 7 of subframe 0 simultaneously carries a reference signal and a broadcast signal, the transmission of the reference signal requires 100 subcarriers, the transmission of the broadcast signal requires 48 subcarriers, the predetermined priorities of the reference signal and the broadcast signal are the same, and the total transmission power is P, so the transmission powers of the reference signal and the broadcast signal can be determined according to the sum of the subcarriers of the reference signal and the broadcast signal, that is, the power of each subcarrier corresponding to the reference signal and the broadcast signal can be determined to be P/(100+48) ═ P/148.

Through the mode, the subcarrier power of the communication signal can be determined according to the occupation ratio of the communication signal in the transmission signal, the power can be more accurately controlled, and the process of D2D link breaking reconstruction is rapidly realized.

In one possible approach, it may also be determined whether an access signal transmitted by a slave device in the D2D link is received, and when the access signal transmitted by the slave device is received, the transmission power of the synchronization signal is adjusted to a first preset power, the transmission power of the reference signal is transmitted to a second preset power, and the transmission power of the broadcast signal is adjusted to a third preset power.

For example, the first preset power, the second preset power and the third preset power may be preset according to actual conditions, and the like, which is not limited in the embodiment of the present disclosure. It should be understood that the values of the first preset power, the second preset power and the third preset power may be the same or different, and the embodiment of the disclosure is not limited thereto.

Whether an access signal transmitted by a slave device in the D2D link is received or not is determined, that is, whether the D2D link is reestablished or not is determined, if the access signal transmitted by the slave device is received, it can be determined that the D2D link is successfully reestablished, so that the transmission power of the synchronization signal, the reference signal and the broadcast signal can be restored to a normal value, that is, the transmission power of the synchronization signal can be adjusted to a first preset power, the transmission power of the reference signal can be transmitted to a second preset power, and the transmission power of the broadcast signal can be adjusted to a third preset power, and the data channel is retransmitted, so as to ensure the stability of the D2D data transmission.

The power control method of the embodiments of the present disclosure is described below with reference to a complete exemplary embodiment. Taking D2D system using OFDM as an example, referring to fig. 2, the power control method may include the following steps:

step S201, detecting whether the D2D link is broken, if the D2D link is broken, then entering step S202, otherwise, continuing to detect whether the D2D link is broken.

Step S202, stops transmitting the data channel.

Step S203, determining whether a modulation symbol comprising at least two communication signals of a synchronization signal, a reference signal and a broadcast signal exists in the D2D link, if so, entering step S204, otherwise, entering step S205.

Step S204, determining whether the preset priorities of at least two communication signals are the same, if not, entering step S206, otherwise, entering step S207.

Step S205, all the transmission total power is used for transmitting the communication signal included in the modulation symbol.

Step S206, distributing the total transmission power for the transmission of the at least two communication signals according to the preset priority of the at least two communication signals.

Step S207, according to the sum of the numbers of the subcarriers corresponding to the at least two communication signals, allocating the total transmission power for the transmission of the at least two communication signals.

Step S208, whether an access signal sent by a slave device in the D2D link is received is determined, if yes, the step S209 is carried out, otherwise, the step S201 is carried out.

Step S209 is to adjust the transmission power of the synchronization signal to a first preset power, to transmit the transmission power of the reference signal to a second preset power, and to adjust the transmission power of the broadcast signal to a third preset power.

By the power control method of the embodiment of the disclosure, when a D2D system is broken due to a weak signal, the reference device can be controlled to stop sending data signals, and then all power of the reference device is used for sending synchronization signals, reference signals and broadcast signals, so that the slave device can accurately reacquire synchronization and successfully read broadcast information, thereby realizing rapid reconstruction of a D2D link.

For example, suppose that the D2D system is based on L TE protocol and adopts the following configuration of FDD (Frequency division Duplex) mode, 10MHz bandwidth, normal CP (Cyclic Prefix ), single antenna, and in the D2D system, the distribution of synchronization signals (PSS/SSS), reference signals (CRS) and broadcast channels (PBCH) is as follows:

the primary synchronization signal is located in modulation symbol 6 of sub-frame 0 and sub-frame 5, and each modulation symbol occupies 62 sub-carriers. The secondary synchronization signal is located at modulation symbol 5 of subframe 0 and subframe 5, and each modulation symbol occupies 62 subcarriers. The reference signal is located in 4 modulation symbols 0, 4, 7, 11 of each subframe, and each modulation symbol occupies 100 subcarriers. The broadcast signal is located in four modulation symbols 7, 8, 9, and 10 of subframe 0, and occupies 48, 72, and 72 subcarriers, respectively.

It can be seen that in the above example, symbol 7 of subframe 0 carries both reference signal (100 subcarriers) and broadcast signal (48 subcarriers), and the total transmission power P needs to be shared. If the reference signal and the broadcast signal on symbol 7 are set to the same priority, the subcarrier power settings of the synchronization signal, the reference signal, and the broadcast signal on the respective modulation symbols of subframe 0 may be as shown in table 1.

TABLE 1

Modulation symbol

0

1～3

4

5

6

7

8

9

10

11

Reference signal

P/148

Master synchronization signal

P/62

Secondary synchronization signal

P/62

Broadcast signal

P/148

P/48

P/72

Referring to table 1, modulation symbol 7 carries both the reference signal and the broadcast signal, and it is necessary to share the total transmission power, so the subcarrier power of the reference signal and the broadcast signal on modulation symbol 7 is set to P/148. Further, since the power of the reference signal remains unchanged in all modulation symbols, the power of the reference signal on the other modulation symbols (modulation symbols 0, 4, 11) is also set to P/148. The other subcarrier power settings in table 1 are determined according to the total transmission power and the number of subcarriers, for example, the primary synchronization signal on modulation symbol 6 occupies 62 subcarriers, so its subcarrier power can be set to P/62.

It should be understood that the subcarrier powers for the synchronization signal and the reference signal on other subframes in the D2D communication and the broadcast signal may be set with reference to subframe 0, and will not be described herein.

Through the power control, when the D2D link is interrupted, the total transmission power of the reference equipment can be used for transmitting the synchronous signal, the reference signal and the broadcast signal after the data signal is stopped, so that the broken link reconstruction of the D2D can be quickly realized.

Based on the same inventive concept, referring to fig. 3, an embodiment of the present disclosure further provides a power control apparatus 300, where the apparatus 300 may include:

a stop sending module 301, configured to stop sending data channels when the device-to-device D2D link is disconnected, where the data channels include a physical downlink control channel and a physical downlink shared channel;

an obtaining module 302, configured to obtain total transmission power of reference devices in the D2D link;

a first allocating module 303, configured to allocate the total transmission power for respective corresponding transmissions of the synchronization signal, the reference signal, and the broadcast signal.

Optionally, the first allocating module 303 is configured to:

and when the modulation symbol comprises the at least two communication signals, distributing total transmission power for the transmission of the at least two communication signals according to preset priority of the at least two communication signals, wherein the preset priority is used for representing the sequence of the transmission power of the distributed communication signals.

Optionally, the apparatus 300 further comprises:

the first determining module is configured to allocate, when the preset priorities of the at least two communication signals are the same, total transmission power for transmission of the at least two communication signals according to the ratios of the at least two communication signals in transmission signals.

Optionally, the apparatus 300 further comprises:

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

By any of the above power control apparatuses, when the D2D system is broken due to a weak signal, the reference device may be controlled to stop sending data signals, and then all power of the reference device is used to send synchronization signals, reference signals and broadcast signals, so that the slave device may accurately reacquire synchronization and successfully read broadcast information, thereby implementing fast reestablishment of the D2D link.

Based on the same inventive concept, an embodiment of the present disclosure further provides an electronic device, including:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to implement the steps of any of the above power control methods.

Through the electronic device, when the D2D system is broken due to weak signals, the reference device is controlled to stop sending data signals, and then all power of the reference device is used for sending the synchronous signals, the reference signals and the broadcast signals, so that the slave device can accurately reacquire synchronization and successfully read the broadcast information, and the rapid reestablishment of the D2D link is realized.

In one possible approach, a block diagram of the electronic device may be as shown in fig. 4. Referring to fig. 4, the electronic device 400 may include: a processor 401 and a memory 402. The electronic device 400 may also include one or more of a multimedia component 403, an input/output (I/O) interface 404, and a communications component 405.

The processor 401 is configured to control the overall operation of the electronic device 400, so as to complete all or part of the steps in the above power control method. The memory 402 is used to store various types of data to support operations at the electronic device 400, such as instructions for any application or method operating on the electronic device 400, and application-related data, such as transmission power values for synchronization signals, reference signals, and broadcast signals, respectively, and so forth.

The Memory 402 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk.

The multimedia components 403 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 402 or transmitted through the communication component 405. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 404 provides an interface between the processor 401 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons.

The communication component 405 is used for wired or wireless communication between the electronic device 400 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 407 may therefore include: Wi-Fi module, Bluetooth module, NFC module, etc.

In an exemplary embodiment, the electronic Device 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable logic devices (Programmable L ic devices, P L D), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components for performing the above power control method.

In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the power control method described above is also provided. For example, the computer readable storage medium may be the memory 402 described above including program instructions that are executable by the processor 401 of the electronic device 400 to perform the power control method described above.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A method of power control, the method comprising:

determining a total transmit power of a reference device in the D2D link;

2. The method of claim 1, wherein said allocating the total transmission power for transmission of synchronization signals, reference signals, and broadcast signals comprises:

3. The method of claim 2, further comprising:

4. The method of claim 2, further comprising:

5. The method according to any one of claims 1-4, further comprising:

6. A power control apparatus, characterized in that the apparatus comprises:

7. The apparatus of claim 6, wherein the first distribution module is configured to:

8. The apparatus of claim 7, further comprising:

9. The apparatus of claim 7, further comprising:

10. The apparatus of any of claims 6-9, further comprising:

11. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.

12. An electronic device, comprising:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 5.