POWER CONTROL METHOD, COMMUNICATION DEVICE, AND COMMUNICATION SYSTEM

Abstract

The embodiments of the present application provide a power control method, a communication device, and a communication system. The method includes: determining whether a first condition is met, the first condition being that a time-frequency resource for sending a first beam and a time-frequency resource for sending a second beam overlap, a ratio of the interference of the first beam to the second beam and a noise floor of a receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of a receiver is greater than a first threshold; and reducing the transmission power of the first beam and the transmission power of the second beam when the first condition is met. According to the method of the present application, the transmission power of the first beam and the transmission power of the second beam are reduced so that the impact on the signal-to-interference-and-noise ratio can be reduced, the communication performance of the network device can be ensured, and the power consumption of the network device can also be reduced.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202210003272.1, entitled “Communication Method and Apparatus,” filed with the China State Intellectual Property Office on January 4, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of communication technologies, and more particularly, to a power control method, a communication device, and a communication system. [Background technology]

[0003] Currently, in 4th generation communication systems (4G) and 5th generation communication systems (5G), the downlink is usually scheduled based on full power. An increase in power leads to an increase in interference. To balance the impact of interference, the interfered party also increases power to counter the interference, which further increases the interference. Ultimately, high power leads to large power consumption, while high power leads to small gain and low power utilization. Therefore, how to reduce the power consumption of network devices as much as possible while ensuring communication performance has become an urgent problem to be solved. Summary of the Invention

[0004] The embodiments of the present application provide a power control method, a communication device, and a communication system for reducing power consumption of a network device as much as possible while ensuring communication performance.

[0005] According to a first aspect, there is provided a communication method, including: The centralized control node determines whether a first condition is met, the first condition being that there is a first time-frequency resource overlap between a time-frequency resource used by the first network device to send out the first beam and a time-frequency resource used by the second network device to send out the second beam, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold; and when the first condition is met, the centralized control node sends first indication information to the first network device and second indication information to the second network device, the first indication information indicating reducing a transmission power of the first beam in the first time-frequency resource, and the second indication information indicating reducing a transmission power of the second beam in the first time-frequency resource.

[0006] According to the method of the present application, when the first condition is met, the centralized control node can individually indicate the first network device and the second network device to reduce beam transmission power, so as to achieve the energy saving purpose.In addition, since both the first network device and the second network device reduce beam transmission power, the signal-to-interference-and-noise ratio does not change significantly, that is, the communication performance of the network device is not fundamentally deteriorated.

[0007] Regarding the first aspect, in some implementations of the first aspect, the method further includes: The centralized control node determines whether a second condition is met, the second condition being that the third network device sends out a third beam on the first time-frequency resource, and a ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold; when the second condition is met, the centralized control node sends third indication information to the third network device, the third indication information indicating reducing the transmission power of the third beam on the first time-frequency resource.

[0008] According to a second aspect, there is provided a communication method, including: the centralized control node sends fourth indication information to the first network device and sends fifth indication information to the second network device, the fourth indication information indicating reducing a beam transmission power of the first network device and the fifth indication information indicating reducing a beam transmission power of the second network device; the centralized control node determines whether a first condition is met, the first condition including a time-frequency resource used by the first network device to send out the first beam and a time-frequency resource used by the second network device to send out the second beam; There is a first time-frequency resource overlapping between the first and second frequency resources, a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold; when the first condition is not met, the centralized control node sends sixth indication information to the first network device and also sends seventh indication information to the second network device, where the sixth indication information indicates to increase the transmission power of the first beam and the seventh indication information indicates to increase the transmission power of the second beam.

[0009] According to the solution of the present application, the centralized control node can first notify the network device to reduce the beam transmission power, and when the first condition is not met, notify the network device to increase the beam transmission power. In other words, when the first condition is met, the network device reduces the beam transmission power to achieve the energy saving purpose. In addition, since the two network devices both reduce the beam transmission power, the signal-to-interference-and-noise ratio does not change significantly, that is, the communication performance of the network device is not basically deteriorated.

[0010] Regarding the second aspect, in some implementations of the second aspect, the method further includes: The centralized control node sends eighth indication information to the third network device, the eighth indication information indicating to reduce the beam transmission power of the third network device; the centralized control node determines whether a second condition is met, the second condition being that the third network device sends out a third beam on the first time-frequency resource, and the ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold; when the second condition is not met, the centralized control node sends ninth indication information to the third network device, the ninth indication information indicating to increase the transmission power of the third beam.

[0011] Regarding the first or second aspect, in some implementations of the first or second aspect, The second beam causes a first interference to the first beam, the fourth beam sent by the fourth network device causes a second interference to the first beam, a ratio of the interference of the first beam to the fourth beam and a noise floor of the receiver is less than or equal to a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold includes: A ratio of the first interference to the sum of the noise floor of the receiver and the second interference is greater than a first threshold.

[0012] With respect to the first or second aspect, in some implementations of the first or second aspect, the method further includes: The centralized control node receives first information from a first network device, the first information indicating time-frequency resources used by the first network device to transmit a first beam, and the centralized control node receives second information from a second network device, the second information indicating time-frequency resources used by the second network device to transmit a second beam.

[0013] With respect to the first or second aspect, in some implementations of the first or second aspect, the method further includes: The centralized control node sends first configuration information to the first network device, the first configuration information indicating time-frequency resources to be used by the first network device to transmit the first beam, and the centralized control node sends second configuration information to the second network device, the second configuration information indicating time-frequency resources to be used by the second network device to transmit the second beam.

[0014] With respect to the first or second aspect, in some implementations of the first or second aspect, the method further includes: The centralized control node determines a first reduced amplitude of the transmission power of the first beam on the first time-frequency resource and a second reduced amplitude of the transmission power of the second beam on the first time-frequency resource.

[0015] With regard to the first or second aspect, in some implementations of the first or second aspect, the first reduced amplitude is the same as the second reduced amplitude.

[0016] According to a third aspect, there is provided a method of communication, comprising: The first network device receives first indication information from the centralized control node, the first indication information indicating reducing the transmission power of the first beam in the first time-frequency resource; the first network device reduces the transmission power of the first beam in the first time-frequency resource based on the first indication information, the first indication information being sent when a first condition is met; the first condition being that there is a first time-frequency resource overlap between the time-frequency resource used by the first network device to send out the first beam and the time-frequency resource used by the second network device to send out the second beam, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold.

[0017] According to a fourth aspect, there is provided a method of communication, comprising: The first network device receives fourth indication information from the centralized control node, the fourth indication information indicating to reduce a beam transmission power of the first network device; the first network device receives sixth indication information from the centralized control node, the sixth indication information indicating to increase the transmission power of the first beam, and the first network device increases the transmission power of the first beam based on the sixth indication information, the sixth indication information being sent when a first condition is not satisfied; the first condition being that there is a first time-frequency resource overlapping between a time-frequency resource used by the first network device to send out the first beam and a time-frequency resource used by the second network device to send out the second beam, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold.

[0018] With respect to the third or fourth aspect, in some implementations of the third or fourth aspect, the method further includes: The first network device sends first information to the centralized control node, where the first information indicates time-frequency resources to be used by the first network device to send out the first beam.

[0019] With respect to the third or fourth aspect, in some implementations of the third or fourth aspect, the method further includes: The first network device receives first configuration information from the centralized control node, the first configuration information indicating time-frequency resources to be used by the first network device to transmit a first beam.

[0020] According to a fifth aspect, there is provided a method of communication, comprising: The first network device sends first information to the second network device, the first information indicating a time-frequency resource used by the first network device to send out the first beam; the first network device receives second information from the second network device, the second information indicating a time-frequency resource used by the second network device to send out the second beam; the first network device determines whether a first condition is met based on the first information and the second information, the first condition being that there is an overlapping first time-frequency resource between the time-frequency resource for sending out the first beam and the time-frequency resource for sending out the second beam, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold; when the first condition is met, the first network device reduces the transmission power of the first beam in the first time-frequency resource.

[0021] According to the method of the present application, the first network device determines whether a first condition is met, and when the first condition is met, reduces the beam transmission power to achieve an energy-saving purpose. Similarly, the second network device may alternatively determine whether a first condition is met, and when the first condition is met, reduces the beam transmission power to achieve an energy-saving purpose. When the two network devices both reduce their transmission powers, the communication performance of the two network devices is basically not degraded.

[0022] According to a sixth aspect, there is provided a method of communication, comprising: the first network device reduces the beam transmission power; the first network device sends first information to the second network device, the first information indicating a time-frequency resource used by the first network device to send out the first beam; the first network device receives second information from the second network device, the second information indicating a time-frequency resource used by the second network device to send out the second beam; the first network device determines whether a first condition is met based on the first information and the second information, the first condition being that there is a first time-frequency resource overlapping between the time-frequency resource for sending out the first beam and the time-frequency resource for sending out the second beam, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold; when the first condition is not met, the first network device increases the transmission power of the first beam.

[0023] According to the method of the present application, the first network device may first reduce the beam transmission power, then determine whether the first condition is met, and increase the beam transmission power if the first condition is not met. Similarly, the second network device may first reduce the beam transmission power, then determine whether the first condition is met, and increase the beam transmission power if the first condition is not met. In other words, when the first condition is met, the two network devices both reduce the beam transmission power to achieve the energy saving purpose, and the communication performance of the two network devices is basically not deteriorated.

[0024] Regarding the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the method further includes: The first network device receiving third information from a fourth network device, the third information indicating a time-frequency resource used by the fourth network device to send out a fourth beam, the second beam causing a first interference to the first beam, the fourth beam causing a second interference to the first beam, a ratio of the interference of the first beam to the fourth beam and a noise floor of the receiver being less than or equal to a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver being greater than the first threshold includes: A ratio of the first interference to the sum of the noise floor of the receiver and the second interference is greater than a first threshold.

[0025] Regarding the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, The time-frequency resource for sending the first beam includes a first time domain and a first proportion occupying a specific frequency domain, and the time-frequency resource for sending the second beam includes a second time domain and a second proportion occupying the specific frequency domain; determining whether the first condition is satisfied includes: When the first time domain and the second time domain overlap each other and both the first ratio and the second ratio are greater than a fourth threshold, the first network device determines that there is an overlapping first time-frequency resource between the time-frequency resource for transmitting the first beam and the time-frequency resource for transmitting the second beam.

[0026] According to a seventh aspect, there is provided a method of communication, comprising: The network device determines whether a third condition is met, the third condition being that there is a second time-frequency resource that overlaps between the time-frequency resource for transmitting the fifth beam and the time-frequency resource for transmitting the sixth beam, a ratio of the interference of the fifth beam to the sixth beam and a noise floor of the receiver is greater than a fifth threshold, and a ratio of the interference of the sixth beam to the fifth beam and a noise floor of the receiver is greater than a fifth threshold; when the third condition is met, the network device reduces the transmission power of the fifth beam and the transmission power of the sixth beam in the second time-frequency resource.

[0027] Regarding the seventh aspect, in some implementations of the seventh aspect, The reduced amplitude of the transmission power of the fifth beam is the same as the reduced amplitude of the transmission power of the sixth beam.

[0028] According to an eighth aspect, there is provided a power control method, the method comprising: The method includes determining whether a first condition is met, the first condition being that a time-frequency resource for transmitting the first beam and a time-frequency resource for transmitting the second beam overlap, a ratio of the interference of the first beam to the second beam and a noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver is greater than a first threshold, and reducing the transmission power of the first beam and the transmission power of the second beam when the first condition is met.

[0029] With respect to the eighth aspect, in some implementations of the eighth aspect, a method includes: The method further includes determining whether a second condition is met, the second condition being that a time-frequency resource for transmitting the first beam and a time-frequency resource for transmitting the third beam overlap and a ratio of interference of the first beam to the third beam and a noise floor of the receiver is greater than a first threshold, and reducing the transmission power of the third beam when the second condition is met.

[0030] With regard to the eighth aspect, in some implementations of the eighth aspect, the method is applicable to a system including a first network device, a second network device, and a third network device, where the first network device is configured to transmit a first beam, the second network device is configured to transmit a second beam, and the third network device is configured to transmit a third beam.

[0031] With regard to the eighth aspect, in some implementations of the eighth aspect, determining whether the first condition is satisfied includes: The first network device and the second network device determine whether a first condition is satisfied.

[0032] Reducing the transmit power of the first beam and the transmit power of the second beam when the first condition is satisfied includes: When a first condition is satisfied, the first network device reduces the transmission power of the first beam and the second network device reduces the transmission power of the second beam.

[0033] With regard to the eighth aspect, in some implementations of the eighth aspect, the first network device and the second network device determining whether a first condition is satisfied includes: The first network device sends first information to the second network device, the first information including time-frequency resources used by the first network device to send out a first beam and interference of the second beam with the first beam; the second network device sends second information to the first network device, the second information including time-frequency resources used by the second network device to send out a second beam and interference of the first beam with the second beam; and the first network device determines whether a first condition is met based on the first information and the second information.

[0034] With regard to the eighth aspect, in some implementations of the eighth aspect, determining whether the second condition is satisfied includes: The third network device determines whether a second condition is satisfied; and Reducing the transmit power of the third beam when the second condition is satisfied includes: When the second condition is met, the third network device reduces the transmit power of the third beam.

[0035] With regard to the eighth aspect, in some implementations of the eighth aspect, the method is applicable to a system including a centralized control node, a first network device, a second network device, and a third network device, where the centralized control node is configured to manage the first network device, the second network device, and the third network device, the first network device configured to transmit a first beam, the second network device configured to transmit a second beam, and the third network device configured to transmit a third beam.

[0036] With regard to the eighth aspect, in some implementations of the eighth aspect, determining whether the first condition is satisfied includes: The centralized control node determines whether a first condition is satisfied; and Reducing the transmit power of the first beam and the transmit power of the second beam when the first condition is satisfied includes: When a first condition is satisfied, the centralized control node sends first indication information to the first network device and sends second indication information to the second network device, where the first indication information indicates reducing the transmission power of the first beam and the second indication information indicates reducing the transmission power of the second beam.

[0037] With regard to the eighth aspect, in some implementations of the eighth aspect, determining whether the second condition is satisfied includes: The centralized control node determines whether a second condition is satisfied; and Reducing the transmit power of the third beam when the second condition is satisfied includes: When the second condition is satisfied, the centralized control node sends third indication information to the third network device, where the third indication information indicates to reduce the transmission power of the third beam.

[0038] Regarding the eighth aspect, in some implementations of the eighth aspect, the reduced amplitude of the transmission power of the first beam is the same as the reduced amplitude of the transmission power of the second beam.

[0039] According to a ninth aspect, there is provided a centralized control node including: a transceiver unit; and a processing unit connected to the transceiver unit; A processing unit configured to determine whether a first condition is satisfied.

[0040] The first condition is that there is a first time-frequency resource that overlaps between a time-frequency resource used by the first network device to transmit the first beam and a time-frequency resource used by the second network device to transmit the second beam, a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0041] When a first condition is satisfied, the transceiver unit is configured to send first indication information to the first network device and second indication information to the second network device, where the first indication information indicates reducing a transmission power of a first beam in the first time-frequency resource and the second indication information indicates reducing a transmission power of a second beam in the first time-frequency resource.

[0042] Regarding the ninth aspect, in some implementations of the ninth aspect, The processing unit is further configured to determine whether a second condition is satisfied.

[0043] The second condition is that the third network device sends out a third beam on the first time-frequency resource, and a ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold.

[0044] When a second condition is satisfied, the transceiver unit is further configured to send third indication information to the third network device, the third indication information indicating reducing the transmission power of the third beam in the first time-frequency resource.

[0045] According to a tenth aspect, a transceiver unit; and a processing unit connected to the transceiver unit. A centralized control node is provided, the centralized control node including: the transceiver unit is configured to send the fourth indication information to the first network device and to send the fifth indication information to the second network device; The fourth indication information indicates reducing a beam transmission power of the first network device, and the fifth indication information indicates reducing a beam transmission power of the second network device; The processing unit is configured to determine whether a first condition is satisfied.

[0046] The first condition is that there is a first time-frequency resource that overlaps between a time-frequency resource used by the first network device to transmit the first beam and a time-frequency resource used by the second network device to transmit the second beam, a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0047] When the first condition is not satisfied, the transceiver unit is configured to send sixth indication information to the first network device and to send seventh indication information to the second network device.

[0048] The sixth indication information indicates to increase the transmission power of the first beam, and the seventh indication information indicates to increase the transmission power of the second beam.

[0049] Regarding the tenth aspect, in some implementations of the tenth aspect, The transceiver unit is further configured to send an eighth indication information to the third network device, the eighth indication information indicating reducing a beam transmission power of the third network device; The processing unit is further configured to determine whether a second condition is satisfied.

[0050] The second condition is that the third network device sends out a third beam on the first time-frequency resource, and a ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold.

[0051] When the second condition is not satisfied, the transceiver unit is further configured to send ninth indication information to the third network device, the ninth indication information indicating increasing the transmission power of the third beam.

[0052] Regarding the ninth or tenth aspect, in some implementations of the ninth or tenth aspect, The transceiver unit is further configured to receive first information from the first network device, the first information indicating a time-frequency resource used by the first network device to send out the first beam; The transceiver unit is further configured to receive second information from the second network device, the second information indicating time-frequency resources used by the second network device to transmit the second beam.

[0053] Regarding the ninth or tenth aspect, in some implementations of the ninth or tenth aspect, The transceiver unit is further configured to send, to the first network device, first configuration information for transmitting the first downlink data, the first configuration information indicating a time-frequency resource used by the first network device to send the first beam, and The transceiver unit is further configured to send, to the second network device, second configuration information for transmitting second downlink data, where the second configuration information indicates time-frequency resources to be used by the second network device to send the second beam.

[0054] Regarding the ninth or tenth aspect, in some implementations of the ninth or tenth aspect, The processing unit is configured to determine a first reduced amplitude of a transmission power of a first beam in the first time-frequency resource and a second reduced amplitude of a transmission power of a second beam in the first time-frequency resource.

[0055] According to an eleventh aspect, there is provided a first network device, comprising: a transceiver unit; and a processing unit connected to the transceiver unit. Including, The transceiver unit is configured to receive first indication information from the centralized control node, the first indication information indicating to reduce a transmission power of a first beam in a first time-frequency resource; The processing unit is configured to reduce a transmit power of the first beam in the first time-frequency resource based on the first indication information.

[0056] According to a twelfth aspect, there is provided a first network device, comprising: a transceiver unit; and a processing unit connected to the transceiver unit. Including, The transceiver unit is configured to receive a fourth indication from the centralized control node, the fourth indication indicating reducing a beam transmit power of the first network device; The transceiver unit is further configured to receive sixth indication information from the centralized control node, the sixth indication information indicating to increase a transmission power of the first beam; The processing unit is further configured to increase the transmit power of the first beam based on the sixth indication information.

[0057] Regarding the eleventh or twelfth aspect, in some implementations of the eleventh or twelfth aspect, The transceiver unit is further configured to send first information to the centralized control node, the first information indicating time-frequency resources used by the first network device to send the first beam.

[0058] Regarding the eleventh or twelfth aspect, in some implementations of the eleventh or twelfth aspect, The transceiver unit is further configured to receive first configuration information from the centralized control node, the first configuration information indicating time-frequency resources to be used by the first network device to transmit the first beam.

[0059] According to a thirteenth aspect, there is provided a first network device, comprising: a transceiver unit; and a processing unit connected to the transceiver unit. Including, The transceiver unit is configured to send first information to the second network device, the first information indicating a time-frequency resource used by the first network device to send the first beam; The transceiver unit is further configured to receive second information from a second network device, the second information indicating a time-frequency resource used by the second network device to transmit the second beam; The processing unit is configured to determine, based on the first information and the second information, whether a first condition is satisfied.

[0060] The first condition is that there is a first time-frequency resource that overlaps between the time-frequency resource for transmitting the first beam and the time-frequency resource for transmitting the second beam, and the ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0061] When the first condition is satisfied, the processing unit is further configured to reduce a transmit power of the first beam in the first time-frequency resource.

[0062] According to a fourteenth aspect, there is provided a first network device, comprising: a transceiver unit; and a processing unit connected to the transceiver unit. Including, The processing unit is configured to reduce a transmit power of the beam; The transceiver unit is configured to send first information to the second network device, the first information indicating a time-frequency resource used by the first network device to send the first beam; The transceiver unit is further configured to receive second information from a second network device, the second information indicating a time-frequency resource used by the second network device to transmit the second beam; The processing unit is further configured to determine, based on the first information and the second information, whether a first condition is satisfied.

[0063] The first condition is that there is a first time-frequency resource that overlaps between the time-frequency resource for transmitting the first beam and the time-frequency resource for transmitting the second beam, and the ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0064] When the first condition is not satisfied, the processing unit is further configured to increase the transmit power of the first beam.

[0065] Regarding the thirteenth aspect or the fourteenth aspect, in some implementations of the thirteenth aspect or the fourteenth aspect, The transceiver unit is further configured to receive third information from the fourth network device, the third information indicating time-frequency resources used by the fourth network device to transmit the fourth beam.

[0066] The second beam causing a first interference to the first beam, the fourth beam causing a second interference to the first beam, a ratio of the interference of the first beam to the fourth beam and a noise floor of the receiver being less than or equal to a first threshold, and a ratio of the interference of the second beam to the first beam and a noise floor of the receiver being greater than a first threshold include: A ratio of the first interference to the sum of the noise floor of the receiver and the second interference is greater than a first threshold.

[0067] Regarding the thirteenth aspect or the fourteenth aspect, in some implementations of the thirteenth aspect or the fourteenth aspect, the time-frequency resource for transmitting the first beam includes a first time domain and a first proportion occupying a specific frequency domain, and the time-frequency resource for transmitting the second beam includes a second time domain and a second proportion occupying the specific frequency domain; When the first time domain and the second time domain overlap each other and both the first ratio and the second ratio are greater than a fourth threshold, the processing unit determines that there is an overlapping first time-frequency resource between the time-frequency resource for transmitting the first beam and the time-frequency resource for transmitting the second beam.

[0068] According to a fifteenth aspect, there is provided a network device, comprising: a transceiver unit; and a processing unit connected to the transceiver unit. Including, The processing unit is configured to determine whether a third condition is satisfied.

[0069] The third condition is that there is a second time-frequency resource that overlaps between the time-frequency resource for transmitting the fifth beam and the time-frequency resource for transmitting the sixth beam, and the ratio of the interference of the fifth beam to the sixth beam to the noise floor of the receiver is greater than a fifth threshold, and the ratio of the interference of the sixth beam to the fifth beam to the noise floor of the receiver is greater than a fifth threshold.

[0070] When a third condition is satisfied, the processing unit is further configured to reduce the transmission power of the fifth beam and the transmission power of the sixth beam in the second time-frequency resource.

[0071] According to a sixteenth aspect, a communication device is provided, including a communication interface and a processor. When the communication device is operational, the processor executes a computer program or instructions stored in a memory such that the communication device performs a method according to any possible implementation of the first to seventh aspects. The memory may be located within the processor or may be implemented using a chip separate from the processor. This is not particularly limited in the present application.

[0072] According to a seventeenth aspect, a computer readable storage medium is provided. The computer readable storage medium includes a computer program. When the computer program is run on a computer, the computer is enabled to perform a method according to any possible implementation of the first to seventh aspects.

[0073] According to an eighteenth aspect, there is provided a chip. A processing circuit is disposed on the chip, the processing circuit being configured to perform a method according to any possible implementation of the first to seventh aspects.

[0074] According to a nineteenth aspect, a computer program product is provided. The computer program product includes a computer program (or may be called code or instructions). When the computer program is run, the computer is enabled to perform a method according to any possible implementation of the first to seventh aspects.

[0075] According to a twentieth aspect, there is provided a communication system including a first network device and a second network device. The first network device and the second network device are configured to perform the method according to the eighth aspect. Optionally, the communication system may further include a third network device.

[0076] According to a twenty-first aspect, there is provided a communication system including a centralized control node, a first network device, a second network device, and a third network device, the centralized control node configured to perform the method according to the eighth aspect. [Brief description of the drawings]

[0077] [Figure 1] FIG. 1 illustrates a system architecture to which an embodiment of the present application is applied. [Diagram 2] FIG. 2 is an interaction diagram of an example of a method according to the present application. [Diagram 3]A diagram showing time-frequency resources for transmitting a first beam and time-frequency resources for transmitting a second beam. [Figure 4] FIG. 2 is an interaction diagram of the method according to the present application. [Diagram 5] FIG. 1 illustrates a situation of interference between multiple cells. [Figure 6] FIG. 2 is an interaction diagram of the method according to the present application. [Figure 7] FIG. 2 is an interaction diagram of the method according to the present application. [Figure 8] FIG. 1 illustrates a situation of interference between multiple cells. [Figure 9] 1 is a flow chart of a method according to the present application. [Figure 10] 1 is a block diagram of a communication device according to the present application; [Figure 11] 1 is a block diagram of a communication device according to the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0078] In the following, technical solutions in the embodiments of the present application are described with reference to the accompanying drawings.

[0079] Technical solutions in embodiments of the present application may be applied to various communication systems, such as global system for mobile communications (GSM), code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) systems, general packet radio service (GPRS) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication systems, 5th Generation (5G) systems, new radio (NR) systems, future 6th Generation (6G) systems, etc.

[0080] For ease of understanding, some terms in this application are first explained.

[0081] (1) Terminal Device

[0082] The terminal device of the embodiment of the present application may be a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile console, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may alternatively be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, another processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, a terminal device in a future 6G network, or a terminal device in a future evolved public land mobile network (PLMN). This is not limited in the embodiment of the present application.

[0083] (2) Network Devices

[0084] The network device in the embodiment of the present application may be a device configured to communicate with a terminal device. The network device may be a base transceiver station (BTS) in a global system for mobile communications (GSM) or a code division multiple access (CDMA) system, or a NodeB (NodeB, NB) in a wideband code division multiple access (WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (CRAN) scenario. Alternatively, the network device may be a relay station, an access point, an in-vehicle device, a wearable device, a network device in a 5G network, a network device in a future 6G network, a network device in a future evolved PLMN network, etc. This is not limited in the embodiment of the present application.

[0085] (3) Interference-coordinated cell groups

[0086] Two cells are used as an example. The two cells may be managed by the same network device or different network devices. For example, network device #1 manages cell #1, and network device #2 manages cell #2.

[0087] Network device #2 may broadcast a reference signal, and multiple terminal devices in cell #1 may receive the reference signal broadcast by network device #2 and perform measurements to obtain measurement results. For example, the measurement result may be Reference Signal Received Power (RSRP). Multiple terminal devices in cell #1 separately feed back the measurement results to network device #1. In addition, network device #2 may also send the load of cell #2 to network device #1. Network device #1 determines whether cell #2 is a strong interference neighbor cell of cell #1 based on the measurement results fed back by multiple terminal devices and the load of cell #2.

[0088] Similarly, network device #2 may alternatively determine whether cell #1 is a strong interfering neighbor cell of cell #2.

[0089] If cell #1 is a strong interfering neighboring cell of cell #2 and cell #2 is a strong interfering neighboring cell of cell #1, then cell #1 and cell #2 are mutual interference coordinated cells.

[0090] The interference-cooperative cell group may include a plurality of cells, and any two cells among the plurality of cells are mutual interference-cooperative cells.

[0091] (4) Interfering beam pair

[0092] An interfering beam pair may be understood as beams that interfere with each other.

[0093] For example, a process of determining a possible interfering beam pair in two cells may include the following steps.

[0094] For example, network device #1 manages cell #1, network device #2 manages cell #2, and terminal device #1 is located in cell #1.

[0095] Step 1: Terminal device #1 transmits a reference signal. In response, network device #1 receives the reference signal in multiple beams. Network device #2 receives the reference signal in the multiple beams.

[0096] Step 2: Network device #1 measures the reference signals received on multiple beams to obtain measurement results. Network device #2 measures the reference signals received on multiple beams to obtain measurement results.

[0097] Step 3: Network device #2 sends the obtained measurement results and beam information to network device #1.

[0098] Step 4: Network device #1 determines an interference beam pair based on the measurement results of network device #1 and network device #2.

[0099] (5) Centralized control node

[0100] The centralized control node may be configured to manage network devices (e.g., base stations). The centralized control node may also be referred to as a base station control node. For example, the centralized control node may be a base band unit (BBU).

[0101] (6) Signal to interference plus noise ratio (SINR)

[0102] The signal-to-interference-plus-noise ratio is a key technical indicator for measuring the communication quality of a communication system. Generally, a larger signal-to-interference-plus-noise ratio indicates better communication quality.

[0103]

number

[0104] where S is the signal, I is the interference, and N is the noise.

[0105] (7) Adjacent cell interference

[0106] For example, cell #1 is adjacent to cell #2, and the interference of cell #2 to cell #1 is the adjacent cell interference experienced by cell #1.

[0107] (8) Inter-stream interference

[0108] In the embodiments of the present application, inter-stream interference may be understood as interference between different data streams.

[0109] In the process of a network device communicating with a terminal device, interference may exist between multiple beams sent by the network device. For example, interference exists between beam #1 sent by network device #1 and beam #2 sent by network device #2. In another example, interference exists between two beams (beam #A and beam #B) sent by network device #1. To reduce the impact of interference on communication, the network device increases the power of the transmission beam. However, increasing the power of the transmission beam further increases the interference between the beams. Ultimately, most of the power of the transmission beam of the network device is used to counter the interference, and the power utilization rate is not high.

[0110] Based on this, the present application provides several methods for reducing the power consumption of network devices as much as possible while ensuring communication performance.

[0111] It should be understood that the network device or centralized control node in this application may be a module located in a baseband unit or a baseband unit, which is not limited in this application.

[0112] FIG. 1(a) shows a communication system. The communication system includes a centralized control node, cell #1, cell #2, cell #3, and cell #4. The four cells may be managed by the same network device or by multiple network devices. In addition, cell #1 and cell #2 are mutual interference coordinated cells. Cell #2, cell #3, and cell #4 are all neighbor cells of cell #1. The communication system may also be referred to as a centralized communication system.

[0113] For ease of explanation, an example in which a first network device manages cell #1, a second network device manages cell #2, a third network device manages cell #3, and a fourth network device manages cell #4 is used in the following description. In addition, a centralized control node manages the four network devices.

[0114] The first network device is configured to transmit a first beam to terminal device #1 in cell #1, the second network device is configured to transmit a second beam to terminal device #2 in cell #2, the third network device is configured to transmit a third beam to terminal device #3 in cell #3, and the fourth network device is configured to transmit a fourth beam to terminal device #4 in cell #4.

[0115] Fig. 1(b) shows another communication system. Compared to that of Fig. 1(a), the communication system does not include a centralized control node. The communication system may also be called a distributed communication system.

[0116] 2 shows a method 200 according to the present application. The method 200 is applicable to the communication system shown in FIG 1(a). Specifically, the method 200 includes the following steps:

[0117] S210: The centralized control node determines whether a first condition is met.

[0118] The first condition is that there is a first time-frequency resource that overlaps between a time-frequency resource used by the first network device to transmit the first beam and a time-frequency resource used by the second network device to transmit the second beam, a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0119] It may be understood that the noise floor of the receiver may also be referred to as the noise floor of the terminal or the noise floor of the terminal device. Factors that affect the noise floor of the terminal include thermal noise and noise figure. For different terminal devices, the noise floor of the terminal may be the same or different.

[0120] It should be understood that the first network device transmits a first beam to perform a first downlink data transmission with terminal device #1, and the second network device transmits a second beam to perform a second downlink data transmission with terminal device #2.

[0121] For example, as shown in Fig. 3, the time-frequency resources for transmitting the first beam are transmission time intervals (TTI) #1 to #3 in the time domain and frequencies #1 to #3 in the frequency domain, and the time-frequency resources for transmitting the second beam are TTI #2 to #4 in the time domain and frequencies #2 to #4 in the frequency domain. In this case, the overlapping first time-frequency resources are TTI #2 and TTI #3 in the time domain and frequencies #2 and #3 in the frequency domain.

[0122] Optionally, in possible cases, the centralized control node may obtain the magnitude of interference of the first beam with the second beam by following the steps below.

[0123] Step 1: A first network device broadcasts a reference signal at a preset power.

[0124] Step 2: The terminal device #2 in the cell #2 receives the reference signal broadcast by the first network device, performs measurement, and obtains a measurement result.

[0125] Step 3: Terminal device #2 sends the measurement result to the second network device.

[0126] Step 4: The second network device may determine the interference of cell #1 to terminal device #2 based on the measurement results.

[0127] In this application example, the interference of cell #1 to terminal device #2 may be considered as interference of a first beam, being transmitted at a preset power by a first network device, to a second beam.

[0128] Step 5: The second network device reports the interference of cell #1 to terminal device #2 to the centralized control node.

[0129] In other words, the second network device reports the interference of the first beam on the second beam to the centralized control node.

[0130] Similar to steps 1 to 5, it can be understood that the centralized control node may alternatively obtain the interference of cell #2 to terminal device #1, i.e., the interference of a second beam being transmitted at a preset power by a second network device to the first beam.

[0131] In the following, the first beam is denoted as beam #1 and the second beam is denoted as beam #2.

[0132] In one equation, the interference of beam #1 to beam #2 (or the interference of cell #1 to terminal device #2) is expressed as PL 12 * where the interference of beam #2 to beam #1 (or the interference of cell #2 to terminal device #1) is PL 21 * The noise floor of terminal device #1 is sometimes written as N1 * The noise floor of terminal device #2 is sometimes written as N2 * It is sometimes written as:

[0133] In a linear domain scale, the ratio of the interference of the first beam on the second beam to the noise floor of the receiver (i.e., the noise floor of terminal device #2) being greater than a first threshold and the ratio of the interference of the second beam on the first beam to the noise floor of the receiver (i.e., the noise floor of terminal device #1) being greater than a first threshold can be expressed using the following inequality: PL 12 * / N2 * >H1 * , and P.L. 21 * / N1 * >H2 * Here, H1 * and>H2 * can be the same or different. This is not limited.

[0134] In another way, on the decibel domain scale (also called the log domain scale), the interference of beam #1 with beam #2 is expressed as PL 12 The interference of beam #2 with beam #1 is sometimes written as PL 21 the noise floor of terminal device #1 may be denoted as N1, and the noise floor of terminal device #2 may be denoted as N2.

[0135] In the decibel domain scale, the ratio of the interference of the first beam on the second beam to the noise floor of the receiver (i.e., the noise floor of terminal device #2) being greater than a first threshold and the ratio of the interference of the second beam on the first beam to the noise floor of the receiver (i.e., the noise floor of terminal device #1) being greater than a first threshold can be expressed using the following inequality: PL 12 -N2>H1, and PL 21 -N1>H2 Here, H1 and >H2 can be the same or different, this is not limited.

[0136] It should be appreciated that when the ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, the interference of the first beam to the second beam may be considered to be much greater than the noise floor of the receiver. When the ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold, the interference of the second beam to the first beam may be considered to be much greater than the noise floor of the receiver.

[0137] In addition, in another possible case, the centralized control node may determine whether the interference of the second beam to the first beam is much greater than the noise floor of terminal device #1 and the interference of another adjacent cell, and whether the interference of the first beam to the second beam is much greater than the noise floor of terminal device #2 and the interference of another adjacent cell.

[0138] For example, neighboring cells of cell #1 include cell #4, and the centralized control node determines that a fourth network device transmits a fourth beam on a first time-frequency resource, where the fourth beam causes interference to the first beam, and the ratio of the interference of the first beam to the fourth beam and the noise floor of the receiver is below a first threshold (e.g., the first beam does not cause interference to the fourth beam).

[0139] The interference of the fourth beam to the first beam (or the interference of cell #4 to terminal device #1) is PL 41 When expressed on a decibel domain scale as , the interference of the second beam with the first beam is much greater than the noise floor of terminal device #1 and the interference of another adjacent cell can be expressed using the following inequality: PL 21 -(N1+PL 41 )>H3

[0140] It should be further understood that in another possible case, the centralized control node determines that a fourth network device transmits a fourth beam on a portion of the first time-frequency resource (denoted as time-frequency resource #N), and the fourth beam causes interference to the first beam.

[0141] In this case, in time-frequency resource #N, the interference of the second beam to the first beam may be much greater than the noise floor of terminal device #1 and the interference of another adjacent cell.

[0142] For time-frequency resources other than time-frequency resource #N of the first time-frequency resource, the interference of the second beam to the first beam may be much greater than the noise floor of terminal device #1.

[0143] S220: When a first condition is satisfied, the centralized control node sends first indication information to the first network device and sends second indication information to the second network device. Correspondingly, the first network device receives the first indication information and the second network device receives the second indication information.

[0144] The first indication information indicates reducing the transmission power of a first beam in the first time-frequency resource, and the second indication information indicates reducing the transmission power of a second beam in the first time-frequency resource.

[0145] Optionally, the first indication information and the second indication information may further include a position of the first time-frequency resource in the time domain and the frequency domain.

[0146] For example, the first time-frequency resource is TTI #2 and TTI #3 in the time domain, and frequency #2 and frequency #3 in the frequency domain.

[0147] It should be understood that the centralized control node may determine a first reduced amplitude of the transmission power of the first beam in the first time-frequency resource and a second reduced amplitude of the transmission power of the second beam in the first time-frequency resource.

[0148] In one method, the first reduced amplitude and the second reduced amplitude may be different values.

[0149] For example, a first network device intends to transmit a first beam at a preset power #1, and a second network device intends to transmit a second beam at a preset power #2. When a first condition is met, the reduced amplitude of the preset power #1 is PL 21 -N1, and the reduced amplitude of preset power #2 may be PL 12 It can be -N2.

[0150] In another scheme, the first reduced amplitude and the second reduced amplitude are the same value.

[0151] If the first and second reduced amplitudes are the same, the power reduced amplitude in decibel domain scale may be determined in the following manner.

[0152] Method 1

[0153] The power reduction amplitude (denoted as Δ) may be determined using the following equation: Δ=min(PL 12 -N2,PL 21 -N1)

[0154] Method 2

[0155] The power reduction amplitude may be determined using the following equation: Δ=min(PL 12 -N2-X,PL 21 -N1-X), where X is the reserved power.

[0156] It should be understood that by setting the reserved power, the impact of power reduction on the signal-to-interference-and-noise ratio can be reduced. The beneficial effect of setting the reserved power will not be described below.

[0157] Method 3

[0158] The power reduction amplitude may be determined using the following equation: Δ=max(PL 12 -N2,PL 21 -N1)

[0159] Method 4

[0160] The power reduction amplitude may be determined using the following equation: Δ=max(PL 12 -N2-X,PL 21 -N1-X)

[0161] It can be understood that the power reduction amplitude of Scheme 1 and Scheme 2 is smaller than that of Scheme 3 and Scheme 4. Therefore, on the premise that communication performance is ensured, the data transmission speed can be improved in Scheme 1 or Scheme 2 compared to that of Scheme 3 and Scheme 4.

[0162] S230: The first network device reduces the transmit power of the first beam in the first time-frequency resource based on the first indication information.

[0163] In a possible manner, the first indication information further includes the first reduced amplitude.

[0164] In this scheme, the first network device determines a reduced transmission power on a first time-frequency resource of a first beam based on the first reduced amplitude.

[0165] In another possible manner, the first indication information further includes a reduced transmission power on the first time-frequency resource of the first beam.

[0166] S240: The second network device reduces the transmit power of the second beam in the first time-frequency resource based on the second indication information.

[0167] In a possible manner, the second indication information further comprises a second reduced amplitude.

[0168] In this scheme, the second network device determines a reduced transmission power on the first time-frequency resource of the second beam based on the second reduced amplitude.

[0169] In another possible manner, the second indication information further includes a reduced transmission power on the first time-frequency resource of the second beam.

[0170] According to the method of the present application, when the interference is much larger than the noise floor of the receiver, the signal to interference and noise ratio satisfies:

[0171]

number

[0172] Since both the first network device and the second network device reduce their transmission power, and both S and I are reduced, the impact on the signal-to-interference-plus-noise ratio can be reduced, the communication performance of the first network device and the second network device can be ensured, and the power consumption of the network devices can also be reduced.

[0173] Optionally, the method further comprises the steps of:

[0174] S250: The centralized control node determines whether a second condition is met.

[0175] The second condition is that the third network device sends out a third beam on the first time-frequency resource, and a ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold. The ratio of the interference of the third beam to the first beam and the noise floor of the receiver may be less than or equal to the first threshold (e.g., the third beam does not cause interference to the first beam).

[0176] A ratio of the interference of the first beam on the third beam to the noise floor of the receiver (i.e., the noise floor of terminal device #3) greater than a first threshold may be understood to mean that before the transmission power of the first beam is reduced, the interference of the first beam on the third beam is much greater than the noise floor of terminal device #3.

[0177] Similar to steps 1 to 5 of S210, the centralized control node can also be understood to obtain the interference of the first beam transmitted by the first network device at a preset power to the third beam (or the interference of cell #1 to terminal device #3) and the interference of the third beam transmitted by the third network device at a preset power to the first beam (or the interference of cell #3 to terminal device #1).

[0178] In other words, in a first time-frequency resource, a first network device needs to send out a first beam, a second network device needs to send out a second beam, and a third network device needs to send out a third beam, and the first beam and the second beam interfere with each other, and the first beam causes interference to the third beam.

[0179] It should be understood that S250 is performed when S230 needs to be performed.

[0180] S260: When the second condition is satisfied, the centralized control node sends third indication information to the third network device, where the third indication information indicates reducing the transmission power of the third beam in the first time-frequency resource.

[0181] Optionally, the third indication information further includes a location of the first time-frequency resource and a reduced amplitude (denoted as a third reduced amplitude) of the transmission power of the third beam in the first time-frequency resource.

[0182] The third reduced amplitude may be the same as the first reduced amplitude and the second reduced amplitude, or may be different from the first reduced amplitude and the second reduced amplitude.

[0183] For example, the third reduced amplitude may be calculated using the following formula: Δ=PL 13 -N3, where PL 13 is the interference of the first beam to the third beam (or the interference of cell #1 to terminal device #3).

[0184] It should be understood that if the second condition is met, it means that when the third network device sends out a third beam to terminal device #3 at the preset power, most of the preset power is used to overcome the interference of the first beam with the third beam.

[0185] Since the transmission power of the first beam is reduced in the first time-frequency resource, i.e., the interference of the first beam to the third beam is reduced in the first time-frequency resource, in a possible manner, the third network device may reduce the power for sending the third beam to reduce power consumption. In another possible manner, the third network device may further send the third beam at a preset power. Since the interference of the first beam to the third beam is reduced in the first time-frequency resource, the third network device sends the third beam at a preset power, which may improve the transmission speed of the downlink data transmission.

[0186] Optionally, there is an overlapping time-frequency resource (denoted as time-frequency resource #M) between the time-frequency resource for transmitting the third beam and the time-frequency resource for transmitting the first beam, and the time-frequency resource #M may be a part of the first time-frequency resource. In this case, the third indication information indicates to reduce the transmission power of the third beam in the time-frequency resource #M.

[0187] In addition, optionally, before S210, the method further includes S201 to S203.

[0188] S201: A first network device sends first information to a centralized control node. In response, the centralized control node receives the first information.

[0189] The first information includes information about the first beam and the time-frequency resource (denoted as time-frequency resource #A) used by the first network device to send the first beam. In other words, the first information directly indicates that the beam called for transmitting the first downlink data is the first beam, and also indicates the time-frequency resource for sending the first beam.

[0190] In another manner, the first information includes the time-frequency resource #A and the probability that each beam in the first group of beams is called. In other words, the first information does not directly indicate the beam called to transmit the first downlink data.

[0191] For example, the multiple beams included in the first beam group are beam #A, beam #B, and beam #C. The probability that the first network device invokes beam #A to transmit the first downlink data is probability #A, the probability that the first network device invokes beam #B is probability #B, and the probability that the first network device invokes beam #C is probability #C.

[0192] S202: The second network device sends second information to the centralized control node. In response, the centralized control node receives the second information.

[0193] The second information includes information about the second beam and the time-frequency resource (denoted as time-frequency resource #B) used by the second network device to send the second beam. In other words, the second information directly indicates that the beam called for transmitting the second downlink data is the second beam, and also indicates the time-frequency resource for sending the second beam.

[0194] In another manner, the second information includes the time-frequency resource #B and the probability that each beam in the second group of beams is called. In other words, the second information does not directly indicate the beam that is called to transmit the second downlink data.

[0195] For example, the multiple beams included in the second beam group are beam #D, beam #E, and beam #F. The probability that the first network device invokes beam #D to transmit the second downlink data is probability #D, the probability that the first network device invokes beam #E is probability #E, and the probability that the first network device invokes beam #F is probability #F.

[0196] S203: The third network device sends third information to the centralized control node. In response, the centralized control node receives the third information.

[0197] The third information includes information regarding a third beam and time-frequency resources used by the third network device to transmit the third beam.

[0198] This process is similar to S201 and S202, and the details will not be described again.

[0199] On the basis that the method further includes S201 and S202, in S210, the centralized control node may determine whether a first condition is satisfied based on the first information and the second information.

[0200] The centralized control node may determine whether time-frequency resource #A and time-frequency resource #B overlap.

[0201] The centralized control node may determine whether the first beam and the second beam interfere with each other, or in other words, whether the first beam and the second beam are an interfering beam pair.

[0202] When the first beam and the second beam are an interfering beam pair, the centralized control node may determine whether a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold and whether a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0203] Alternatively, for example, the first beam group includes beam #A, beam #B, and beam #C, and the second beam group includes beam #D, beam #E, and beam #F. The probability that beam #A is called is greater than the second threshold, the probability that beam #B is called is less than the second threshold, the probability that beam #C is called is less than the second threshold, the probability that beam #D is called is greater than the third threshold, the probability that beam #E is called is less than the third threshold, and the probability that beam #F is called is less than the third threshold. The second threshold may be equal to the third threshold, or the second threshold may be different from the third threshold.

[0204] If beam #A and beam #D interfere with each other, the centralized control node determines that a beam called to transmit the first downlink data and a beam called to transmit the second downlink data interfere with each other. Further, the centralized control node determines whether a ratio of the interference of beam #A to beam #D and a noise floor of the receiver is greater than a first threshold value and whether a ratio of the interference of beam #D to beam #A and a noise floor of the receiver is greater than a first threshold value.

[0205] If beam #A and beam #D do not interfere with each other, the centralized control node determines that the beam called for transmitting the first downlink data and the beam called for transmitting the second downlink data do not interfere with each other.

[0206] Optionally, in another case, before S210, the method further includes S204 to S206.

[0207] S204: The centralized control node sends the first configuration information to the first network device.

[0208] The first configuration information indicates time-frequency resources used by the first network device to transmit the first beam.

[0209] S205: The centralized control node sends the second configuration information to the second network device.

[0210] The second configuration information indicates time-frequency resources to be used by the second network device to transmit the second beam.

[0211] S206: The centralized control node sends the third configuration information to the third network device.

[0212] The third configuration information indicates time-frequency resources to be used by the third network device to transmit the third beam.

[0213] On the basis that the method further includes S204 and S205, in S210, the centralized control node may determine whether a first condition is met based on the first setting information and the second setting information.

[0214] For example, the time-frequency resources for transmitting the first beam are TTI#1 to TTI#3 in the time domain and frequency#1 to frequency#3 in the frequency domain. The time-frequency resources for transmitting the second beam are TTI#2 to TTI#4 in the time domain and frequency#2 to frequency#4 in the frequency domain. In this case, the overlapping first time-frequency resources are TTI#2 and TTI#3 in the time domain and frequency#2 and frequency#3 in the frequency domain.

[0215] The centralized control node may further determine whether the first beam and the second beam interfere with each other. When the first beam and the second beam are an interfering beam pair, the centralized control node may determine whether a ratio of the interference of the first beam with the second beam and a noise floor of the receiver is greater than a first threshold and whether a ratio of the interference of the second beam with the first beam and a noise floor of the receiver is greater than a first threshold.

[0216] It should be understood that the above method 200 is described using an example in which two cells are mutual interference coordinated cells. It is clear that the method of the present application is also applicable to a scenario in which multiple cells interfere with each other. It can be understood that the centralized control node can determine the interference coordinated cell group corresponding to each cell.

[0217] In one example, the interference coordinated cell group of cell #1 is (cell #1, cell #2, and cell #3). If the centralized control node determines that cell #1, cell #2, and cell #3 send beams in the same time-frequency resource (the beams of the three cells are respectively denoted as beam #1, beam #2, and beam #3), and the mutual interference between beam #1 and beam #2 is much larger than the noise floor of the receiver, the mutual interference between beam #1 and beam #3 is much larger than the noise floor of the receiver, and the mutual interference between beam #2 and beam #3 is much larger than the noise floor of the receiver, the transmission power of beam #1, the transmission power of beam #2, and the transmission power of beam #3 can be reduced simultaneously.

[0218] 4 shows a method 400 according to the present application. The method 400 is applicable to the communication system shown in FIG 1(a). Specifically, the method 400 includes the following steps:

[0219] S410: The centralized control node sends fourth indication information to the first network device and sends fifth indication information to the second network device. In response, the first network device receives the fourth indication information and the second network device receives the fifth indication information.

[0220] The fourth indication information indicates reducing a beam transmit power of the first network device, and the fifth indication information indicates reducing a beam transmit power of the second network device.

[0221] Optionally, the fourth indication information and the fifth indication information may further include a reduced amplitude of the beam transmission power. The reduced amplitude of the beam transmission power may be calculated with reference to the manner of S220.

[0222] S420: The centralized control node determines whether a first condition is met.

[0223] The first condition is that there is a first time-frequency resource that overlaps between a time-frequency resource used by the first network device to transmit the first beam and a time-frequency resource used by the second network device to transmit the second beam, a ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0224] In other words, at S420, the centralized control node determines whether the interference of a first beam transmitted by a first network device at a preset power (i.e., the transmission power before power reduction) to a second beam is much greater than the noise floor of the receiver, and also determines whether the interference of a second beam transmitted by a second network device at a preset power to the first beam is much greater than the noise floor of the receiver.

[0225] It may be understood that the preset power for the first network device to transmit the first beam may be the same as or different from the preset power for the second network device to transmit the second beam.

[0226] In addition, in another possible case, the centralized control node may determine whether the interference of the second beam to the first beam is much greater than the noise floor of terminal device #1 and the interference of another adjacent cell, and whether the interference of the first beam to the second beam is much greater than the noise floor of terminal device #2 and the interference of another adjacent cell.

[0227] For details about S420, please refer to the explanation of S210.

[0228] S430: If the first condition is not met, the centralized control node sends sixth indication information to the first network device and sends seventh indication information to the second network device. Correspondingly, the first network device receives the sixth indication information and the second network device receives the seventh indication information.

[0229] The sixth indication information indicates to increase the transmission power of the first beam. The seventh indication information indicates to increase the transmission power of the second beam.

[0230] For example, the preset power for the first network device to transmit the first beam is 100W, and the preset power for the second network device to transmit the second beam is 150W. At S410, the centralized control node may indicate the first network device and the second network device to reduce the power when transmitting the beams. At S420, the centralized control node determines that when the first network device transmits the first beam at 100W and the second network device transmits the second beam at 150W, the mutual interference between the first beam and the second beam is not much greater than the noise floor of the receiver. At S430, the centralized control node may indicate the first network device to continue transmitting the first beam at the preset power and indicate the second network device to continue transmitting the second beam at the preset power.

[0231] S440: The first network device increases the transmission power of the first beam based on the sixth indication information, and the second network device increases the transmission power of the second beam based on the seventh indication information.

[0232] For example, the preset power for sending the first beam by the first network device is power #1. At S410, the first network device adjusts the transmission power of the first beam from power #1 to power #2 based on the fourth indication information. At S440, the first network device adjusts the transmission power of the first beam from power #2 to power #1 based on the sixth indication information. In other words, the first network device may continue to send the first beam at the preset power. The second network device is similar.

[0233] Optionally, when the first condition is satisfied, the centralized control node may send a message #A to the first network device and the second network device, where the message #A indicates the location of the first time-frequency resource. When sending the first beam, the first network device reduces the transmission power in the first time-frequency resource. In the time-frequency resource other than the first time-frequency resource, the first network device may send the first beam with the original preset power. The same is true for the second network device.

[0234] According to the solution of the present application, the centralized control node may first notify the network device to reduce the beam transmission power, and notify the network device to increase the beam transmission power when the first condition is not met. In other words, when the first condition is met, the two network devices both reduce the beam transmission power to achieve the energy saving purpose. In addition, since the two network devices both reduce the beam transmission power, the impact on the signal-to-interference-and-noise ratio can be reduced, and the communication performance of the first network device and the second network device can be ensured. In addition, compared with that of the method 200, when the first condition is not met, the centralized control node notifies the two network devices to increase the transmission power, so that the transmission speed of the downlink data transmission carried out by the two network devices can be improved.

[0235] Optionally, the method further includes S450 to S480.

[0236] S450: The centralized control node sends an eighth indication information to the third network device, where the eighth indication information indicates to reduce the beam transmission power of the third network device. In response, the third network device receives the eighth indication information.

[0237] Optionally, the reduced amplitude of the beam transmission power of the third network device may or may not be equal to the reduced amplitude of the beam transmission power of the first network device as well as the reduced amplitude of the beam transmission power of the second network device.

[0238] For example, the reduced amplitude of the beam transmission power of the third network device may be calculated with reference to the method of S260.

[0239] S460: The centralized control node determines whether a second condition is met.

[0240] The second condition is that the third network device transmits a third beam on the first time-frequency resource, and a ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than a first threshold, and a ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold (e.g., the third beam does not cause interference to the first beam).

[0241] Alternatively, there may be an overlapping time-frequency resource (denoted as time-frequency resource #M) between the time-frequency resource for sending the third beam and the time-frequency resource for sending the first beam, and the time-frequency resource #M may be a part of the first time-frequency resource. The second condition is that the third network device sends the third beam in the time-frequency resource #M, and the ratio of the interference of the first beam to the third beam and the noise floor of the receiver is greater than the first threshold, and the ratio of the interference of the third beam to the first beam and the noise floor of the receiver is less than or equal to the first threshold (e.g., the third beam does not cause interference to the first beam).

[0242] S470: When the second condition is not satisfied, the centralized control node sends ninth indication information to the third network device, the ninth indication information indicating increasing the transmission power of the third beam.

[0243] S480: The third network device increases the transmission power of the third beam based on the ninth indication information.

[0244] For example, the preset power for sending the third beam by the third network device is power #3. At S450, the third network device may adjust the transmission power of the third beam from power #3 to power #4 based on the eighth indication information. At S480, since the second condition is not met, the third network device may adjust the transmission power of the third beam from power #4 to power #3 based on the ninth indication information. In other words, the third network device may continue to transmit the third beam at the preset power.

[0245] Optionally, when the second condition is met, the centralized control node may send a message #B to the third network device. The message #B indicates the location of the first time-frequency resource, and the third network device reduces the transmission power in the first time-frequency resource when sending the third beam. In the time-frequency resource other than the first time-frequency resource, the third network device may send the third beam at the preset power.

[0246] Alternatively, message #B indicates the location of time-frequency resource #M. When sending the third beam, the third network device reduces the transmission power in time-frequency resource #M. In time-frequency resources other than time-frequency resource #M, the third network device may send the third beam at a preset power.

[0247] Optionally, in some cases, before S420, the method further includes S201 and S202, the details of which are not described again in this specification.

[0248] Optionally, in another case, before S420, the method further includes S204 and S205, the details of which are not described again in this specification.

[0249] It should be understood that the above method 400 is described using an example where the two cells are mutually interfering cooperative cells. It is clear that the method of the present application is also applicable to a multi-cell scenario.

[0250] In one example, the interference coordinated cell group of cell #1 is (cell #1, cell #2, and cell #3), and the centralized control node first indicates the network devices managing cell #1, cell #2, and cell #3 to reduce the transmission power of the beam. Then, the centralized control node determines that cell #1, cell #2, and cell #3 are sending beams on the same time-frequency resource (the beams of the three cells are denoted as beam #1, beam #2, and beam #3, respectively), but beam #1, beam #2, and beam #3 are not interfering with each other. In this case, the centralized control node may indicate the network devices managing cell #1, cell #2, and cell #3 to increase the transmission power of the beam.

[0251] In addition, in a centralized control system, the following cases may occur:

[0252] Case 1:

[0253] As shown in Fig. 5a, three cells are used as an example. The centralized control node determines that cell #1, cell #2, and cell #3 need to send out beams (the beams of the three cells are denoted as beam #1, beam #2, and beam #3, respectively) in the same time-frequency resource. Beam #1 causes interference to beam #2, beam #2 causes interference to beam #3, and beam #3 causes interference to beam #1. PL 12 is much larger than the noise floor of the receiver, and the PL 23 is much larger than the noise floor of the receiver, and the PL 31 is much larger than the noise floor of the receiver. In this case, the centralized control node notifies the network devices of the three cells to reduce the transmit power of beam #1, the transmit power of beam #2, and the transmit power of beam #3.

[0254] PL in this application ij should be understood to mean the interference of beam i with beam j.

[0255] Optionally, the power reduction amplitudes of beams #1 to #3 are the same.

[0256] For example, power reduction amplitude = min(PL 12 -N,PL 23 -N,PL 31 -N).

[0257] In another example, power reduction amplitude = min(PL 12 -NX,PL 23 -NX,PL 31 -NX).

[0258] Case 2:

[0259] As shown in Fig. 5b, four cells are used as an example. The centralized control node determines that cell #1 to cell #4 need to send beams (the beams of the four cells are denoted as beam #1 to beam #4, respectively) in the same time-frequency resource. Beam #1 causes interference to beam #2, beam #2 causes interference to beam #3, and beam #3 causes interference to beam #1 and beam #4. PL 12 is much larger than the noise floor of the receiver, and the PL 23 is much larger than the noise floor of the receiver, and the PL 31 is much larger than the noise floor of the receiver, and the PL 34 is much larger than the noise floor of the receiver.

[0260] In some cases, the centralized control node notifies network devices of the four cells to reduce the transmit power of beam #1 to the transmit power of beam #4.

[0261] Optionally, the power reduction amplitudes of beams #1 to #4 are the same.

[0262] For example, power reduction amplitude = min(PL 12 -N,PL 23 -N,PL 31 -N,PL 34 -N).

[0263] For example, power reduction amplitude = min(PL 12 -NX,PL 23 -NX,PL 31 -NX,PL 34 -NX).

[0264] In another case, the centralized control node notifies the network devices of cell #1 to cell #3 to reduce the transmission power of beam #1 to the transmission power of beam #3. In other words, the transmission power of beam #4 may not be reduced.

[0265] Case 3:

[0266] As shown in Fig. 5c, four cells are used as an example. The centralized control node determines that cell #1 to cell #4 need to send out beams (the beams of the four cells are denoted as beam #1 to beam #4, respectively) in the same time-frequency resource. Beam #1 causes interference to beam #2, beam #2 causes interference to beam #3, beam #3 causes interference to beam #1, and beam #4 causes interference to beam #3. PL 12 is much larger than the noise floor of the receiver, and the PL 23 is much larger than the noise floor of the receiver, and the PL 31 is much larger than the noise floor of the receiver, and the PL 43 is much larger than the noise floor of the receiver. The centralized control node notifies the network devices of the four cells to reduce the transmit power of beam #1 to the transmit power of beam #4.

[0267] Optionally, the power reduction amplitudes of beams #1 to #4 are the same.

[0268] For example, power reduction amplitude = min(PL 12 -N,PL 23 -N,PL 31 -N,PL 43 -N).

[0269] For example, power reduction amplitude = min(PL 12 -NX,PL 23 -NX,PL 31 -NX,PL 43 -NX).

[0270] Case 4:

[0271] As shown in Fig. 5d, three cells are used as an example. The centralized control node determines that cell #1 to cell #3 need to send beams (the beams of the three cells are denoted as beam #1 to beam #3, respectively) in the same time-frequency resource. Beam #1 causes interference to beam #2, beam #2 causes interference to beam #3, and beam #3 does not cause interference to beam #1. PL 12 is much larger than the noise floor of the receiver, and the PL 23 is much larger than the noise floor of the receiver.

[0272] In a possible case, the centralized control node notifies network devices in the three cells to reduce the transmit power of beam #1 to the transmit power of beam #3.

[0273] Optionally, the power reduction amplitudes of beams #1 to #3 are the same.

[0274] For example, power reduction amplitude = min(PL 12 -N,PL 23 -N).

[0275] In another example, power reduction amplitude = min(PL 12 -NX,PL 23 -NX).

[0276] In another possible case, the centralized control node notifies the network devices of cell #1 and cell #2 to reduce the transmission power of beam #1 and the transmission power of beam #2. In other words, the transmission power of beam #3 may remain unchanged. Since the transmission power of beam #2 is reduced, PL 23 It should be understood that, if the transmission power of beam #3 remains unchanged, the downlink data transmission rate of the network device of cell #3 is improved.

[0277] Figure 6 shows a method 600 according to the present application. The method is applicable to the communication system shown in Figure 1(b). Cell #1 and Cell #2 are mutual interference coordinated cells. Specifically, the method 600 includes the following steps:

[0278] S610: A first network device sends first information to a second network device, and in response, the second network device receives the first information.

[0279] The first information includes a time-frequency resource (denoted as time-frequency resource #A) used by the first network device to send out the first beam, and the interference of the second beam to the first beam (or the interference of cell #2 to terminal device #1). It should be understood that the first network device also stores the first information.

[0280] It should be understood that for the manner in which the first network device obtains the interference of the second beam with the first beam, refer to S210. The first network device sends out the first beam to perform a first downlink data transmission to the terminal device #1.

[0281] The following describes a scheme in which the first information indicates time-frequency resource #A.

[0282] Method A:

[0283] The time-frequency resource #A includes a first time region and a first frequency region. In other words, the first information indicates the exact location of the time-frequency resource used to transmit the first downlink data.

[0284] Method B:

[0285] Time-frequency resource #A includes a first time region and a first percentage occupying a particular frequency region.

[0286] In a possible manner, both frequency domain resources that can be used by the first network device and the second network device are a specific frequency domain.

[0287] For example, the specific frequency domain is from frequency #A to frequency #B, and the first information indicates that the frequency domain resource of time-frequency resource #A occupies 80% of frequency #A to frequency #B.

[0288] Optionally, the first network device may estimate whether the first network device performs the first downlink data transmission on the time domain resource #A. For example, the first network device may perform the estimation based on information such as the amount of data buffered on the base station side and the scheduling queue. The first information may indicate whether the first network device performs the first downlink data transmission on the time domain resource #A.

[0289] In a special case, the first network device sends the first information only when the first ratio is greater than the fourth threshold. In other words, in this case, the first information indicates to the first network device to perform the first downlink data transmission in the first time domain, and implicitly indicates that the first ratio is greater than the fourth threshold.

[0290] Optionally, in another case, the first information includes a probability that each beam of the first group of beams is called. In other words, the first information does not directly indicate the beam that is called to transmit the first downlink data. For details, please refer to the above description.

[0291] S620: The second network device sends the second information to the first network device, and in response, the first network device receives the second information.

[0292] The second information includes a time-frequency resource (denoted as time-frequency resource #B) used by the second network device to send out the second beam and the interference of the first beam to the second beam (or the interference of cell #1 to terminal device #2). It should be understood that the second network device also stores the second information.

[0293] It should be understood that for the manner in which the second network device obtains the interference of the first beam with the second beam, see S210. The second network device sends out the second beam to perform the second downlink data transmission.

[0294] The following describes a scheme in which the second information indicates time-frequency resource #B.

[0295] Method A:

[0296] The time-frequency resource #B includes a second time region and a second frequency region. In other words, the second information indicates an exact location of the time-frequency resource #B used to transmit the second downlink data.

[0297] Method B:

[0298] Time-frequency resource #B includes a second time region and a second percentage occupying a particular frequency region.

[0299] In a possible manner, both frequency domain resources that can be used by the first network device and the second network device are a specific frequency domain.

[0300] For example, the specific frequency domain is from frequency #A to frequency #B, and the second information indicates that the frequency domain resource of time-frequency resource #B occupies 85% of frequency #A to frequency #B.

[0301] Optionally, the second network device may estimate whether the second network device performs the first downlink data transmission on the time domain resource #B. For example, the second network device may perform the estimation based on information such as the amount of data buffered on the base station side and the scheduling queue. The second information may indicate whether the second network device performs the second downlink data transmission on the time frequency resource #B.

[0302] In a special case, the first network device sends the second information only when the second ratio is greater than a fourth threshold. In other words, in this case, the second information indicates to the second network device to perform the second downlink data transmission in the second time domain, and implicitly indicates that the second ratio is greater than a fourth threshold.

[0303] Optionally, in another case, the second information includes a probability that each beam of the second group of beams is called. In other words, the second information does not directly indicate the beam that is called to transmit the second downlink data. For details, please refer to the above description.

[0304] It should be understood that S620 may be performed before S610 or simultaneously with S610.

[0305] S630: The first network device determines, based on the first information and the second information, whether a first condition is satisfied.

[0306] The first condition is that there is a first time-frequency resource that overlaps between time-frequency resource #A and time-frequency resource #B, and the ratio of the interference of the first beam to the second beam to the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the second beam to the first beam to the noise floor of the receiver is greater than a first threshold.

[0307] The following describes how the first network device determines whether time-frequency resource #A overlaps with time-frequency resource #B.

[0308] Case A:

[0309] When S610 is performed in Scheme #A and S620 is performed in Scheme #A, the first network device determines whether time-frequency resource #A overlaps with time-frequency resource #B based on the first time domain, the first frequency domain, the second time domain, and the second frequency domain.

[0310] Further, the first network device may determine a location of the first time-frequency resource in the time domain and the frequency domain.

[0311] Case B:

[0312] When S610 is performed in Scheme #B and S620 is performed in Scheme #B, when the first time domain and the second time domain overlap each other and both the first ratio and the second ratio are greater than the fourth threshold, the first network device determines that time-frequency resource #A overlaps with time-frequency resource #B.

[0313] Furthermore, the first network device may determine the location of the first time-frequency resource in the time domain. The first network device cannot accurately determine the location of the first time-frequency resource in the frequency domain. In a possible implementation, a specific frequency domain is used as the location of the first time-frequency resource in the frequency domain. In this case, the range of the specific frequency domain may be larger than the actual frequency domain range of the first time-frequency resource in the frequency domain.

[0314] The first network device further determines whether the first beam and the second beam interfere with each other and whether the mutual interference between the first beam and the second beam is much greater than a noise floor of the receiver.

[0315] Optionally, the first network device may further determine, based on the probability that each beam in the first beam group is called and the probability that each beam in the second beam group is called, whether a beam called for transmitting the first downlink data and a beam called for transmitting the second downlink data interfere with each other and whether the mutual interference is much greater than the noise floor of the receiver.

[0316] In a special case, the first information indicates to the first network device to perform the first downlink data transmission in a first time domain and implicitly indicates that the first ratio is greater than a fourth threshold. The second information indicates to the second network device to perform the second downlink data transmission in a second time domain and implicitly indicates that the second ratio is greater than a fourth threshold. In this case, if the first time domain overlaps with the second time domain, the first network device determines that there is an overlapping first time-frequency resource between time-frequency resource #A and time-frequency resource #B.

[0317] Optionally, the method includes: the fourth network device sends third information to the first network device. In response, the first network device receives the third information. The third information includes a time-frequency resource used by the fourth network device to send the fourth beam.

[0318] In addition, the first network device may experience interference of the fourth beam to the first beam (or interference of cell #4 to terminal device #1).

[0319] In a possible case, the first network device may determine whether the interference of the second beam with the first beam is much greater than the noise floor of terminal device #1 and the interference of another adjacent cell.

[0320] S640: When a first condition is satisfied, the first network device reduces the transmit power of a first beam in a first time-frequency resource.

[0321] In one method, the first network device may determine a reduced amplitude of the transmission power of the first beam based on Method 1 or Method 2 of S220.

[0322] S650: The second network device determines, based on the first information and the second information, whether a first condition is satisfied.

[0323] This process is similar to S630.

[0324] S660: When a first condition is satisfied, the second network device reduces the transmit power of the second beam in the first time-frequency resource.

[0325] In one method, the second network device may determine a reduced amplitude of the transmission power of the second beam based on Method 1 or Method 2 of S220.

[0326] The first network device and the second network device determine the transmission power reduction amplitude according to the same rule. The transmission power reduction amplitude of the first beam and the transmission power reduction amplitude of the second beam can be the same or different. This is not limited.

[0327] According to the method of the present application, the first network device and the second network device determine whether the first condition is met based on the same method. When the first condition is met, the two network devices both reduce the beam transmission power to achieve the energy saving purpose, but the communication performance is not basically deteriorated.

[0328] It should be understood that the above method 600 is described using an example where two cells interfere with each other. It is clear that the method of the present application is also applicable to a scenario where multiple cells interfere with each other.

[0329] In one example, the interference coordinated cell group of cell #1 is (cell #1, cell #2, and cell #3). If the network device of cell #1 determines that cell #1, cell #2, and cell #3 send beams on the same time-frequency resource (the beams of the three cells are denoted as beam #1, beam #2, and beam #3, respectively), and the mutual interference between beam #1 and beam #2 is much larger than the noise floor of the receiver, and the mutual interference between beam #1 and beam #3 is much larger than the noise floor of the receiver, the network device of cell #1 may reduce the transmission power of beam #1.

[0330] Figure 7 shows a method 700 according to the present application. The method is applicable to the communication system shown in Figure 1(b). Cell #1 and Cell #2 are mutual interference coordinated cells. Specifically, the method 700 includes the following steps:

[0331] S710: The first network device reduces the transmission power of the beam. The second network device reduces the transmission power of the beam.

[0332] The reduced amplitude of the beam transmit power may be calculated with reference to the method of S220.

[0333] S720: The first network device sends the first information to the second network device, and in response, the second network device receives the first information.

[0334] The first information includes a time-frequency resource (denoted as time-frequency resource #A) used by the first network device to transmit the first beam and the interference of the second beam with the first beam (or the interference of cell #2 with terminal device #1).

[0335] For details of the process, please refer to the description of S610.

[0336] Optionally, in another case, the first information includes a probability that each beam of the first group of beams is called. In other words, the first information does not directly indicate the beam that is called to transmit the first downlink data. For details, please refer to the above description.

[0337] S730: The second network device sends the second information to the first network device. In response, the first network device receives the second information.

[0338] The second information includes a time-frequency resource (shown as time-frequency resource #B) used by the second network device to transmit the second beam and the interference of the first beam on the second beam (or the interference of cell #1 on terminal device #2).

[0339] For details of the process, please refer to the description of S620.

[0340] Optionally, in another case, the second information includes a probability that each beam of the second group of beams is called. In other words, the second information does not directly indicate the beam that is called to transmit the second downlink data. For details, please refer to the above description.

[0341] S740: The first network device determines, based on the first information and the second information, whether a first condition is satisfied.

[0342] The first condition is that there is a first time-frequency resource that overlaps between time-frequency resource #A and time-frequency resource #B, and the ratio of the interference of the first beam to the second beam to the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the second beam to the first beam to the noise floor of the receiver is greater than a first threshold.

[0343] For details of the process, please refer to the explanation of S630.

[0344] Optionally, the method includes: a fourth network device sends third information to the first network device, the third information including a time-frequency resource used by the fourth network device to send the fourth beam.

[0345] In addition, the first network device may experience interference of the fourth beam to the first beam (or interference of cell #4 to terminal device #1).

[0346] In a possible case, the first network device may determine whether the interference of the second beam with the first beam is much greater than the noise floor of terminal device #1 and the interference of another adjacent cell.

[0347] S750: When a first condition is not satisfied, the first network device increases the transmit power of the first beam.

[0348] For example, the preset power for the first network device to transmit the first beam is 100 W, and the preset power for the second network device to transmit the second beam is 150 W. At S710, the first network device expects to transmit the first beam at a power lower than 100 W. At S740, the first network device determines that when the first network device transmits the first beam at 100 W and the second network device transmits the second beam at 150 W, the mutual interference between the first beam and the second beam is not much greater than the noise floor of the receiver. At S750, the first network device continues to transmit the first beam at the preset power.

[0349] Optionally, when the first condition is satisfied, the first network device determines a position of the first time-frequency resource. When sending out the first beam, the first network device reduces a transmission power in the first time-frequency resource. For time-frequency resources other than the first time-frequency resource, the transmission power of the first beam may be a preset power.

[0350] S760: The second network device determines, based on the first information and the second information, whether a first condition is satisfied.

[0351] S770: When the first condition is not satisfied, the second network device increases the transmission power of the second beam.

[0352] For example, the preset power for the first network device to transmit the first beam is 100 W, and the preset power for the second network device to transmit the second beam is 150 W. At S710, the second network device expects to transmit the second beam at a power lower than 150 W. At S760, the second network device determines that when the first network device transmits the first beam at 100 W and the second network device transmits the second beam at 150 W, the mutual interference between the first beam and the second beam is not much greater than the noise floor of the receiver. At S770, the second network device continues to transmit the second beam at the preset power.

[0353] Optionally, when the first condition is satisfied, the second network device determines a position of the first time-frequency resource. When sending the second beam, the second network device reduces a transmission power in the first time-frequency resource. For time-frequency resources other than the first time-frequency resource, the transmission power of the second beam may be a preset power.

[0354] According to the method of the present application, the first network device and the second network device may first reduce the beam transmission power, and then determine whether the first condition is met based on the same method, and increase the beam transmission power if the first condition is not met. In other words, if the first condition is met, both the first network device and the second network device reduce the transmission power. In one aspect, the power consumption of the network device may be reduced, and in another manner, the impact on the signal-to-interference-and-noise ratio may be reduced, thereby ensuring the communication performance of the first network device and the second network device.

[0355] It should be understood that the above method 700 is described using an example where two cells interfere with each other. It is clear that the method of the present application is also applicable to a scenario where multiple cells interfere with each other.

[0356] In one example, the interference coordinated cell group of cell #1 is (cell #1, cell #2, and cell #3). The network device of cell #1 may first reduce the transmission power of the beam. If the network device of cell #1 determines that cell #1, cell #2, and cell #3 transmit beams in the same time-frequency resource (the beams of the three cells are respectively denoted as beam #1, beam #2, and beam #3), but the mutual interference between the three beams is not much larger than the noise floor of the receiver, the network device of cell #1 may transmit beam #1 at a preset power.

[0357] In addition, in a distributed control system, the following cases may occur:

[0358] Case 1:

[0359] As shown in Fig. 8a, four cells are used as an example. Cell #1 to Cell #4 send out beams in the same time-frequency resource (the beams of the four cells are denoted as Beam #1 to Beam #4, respectively). Beam #1 causes interference to Beam #2, Beam #2 causes interference to Beam #3, Beam #3 causes interference to Beam #4, and Beam #4 causes interference to Beam #1. PL 12 is much larger than the noise floor of the receiver, and the PL 23 is much larger than the noise floor of the receiver, and the PL 34 is much larger than the noise floor of the receiver, and the PL 41 is much larger than the noise floor of the receiver.

[0360] In cell #1, the network device of cell #1 determines that cell #1 and cell #2 send out beams in the same time-frequency resource, and beam #1 causes interference to beam #2, resulting in a PL12 It may be known that the noise floor of the receiver is much larger than the noise floor of the receiver. In this case, the network device of cell #1 reduces the transmission power of beam #1. In cell #2, the network device of cell #2 may know that cell #2 and cell #3 send out beams in the same time-frequency resource, and beam #2 causes interference to beam #3, resulting in a large PL. 23 It may be known that, is much larger than the noise floor of the receiver. In this case, the network device of cell #2 will reduce the transmit power of beam #2. The same goes for other cells.

[0361] Alternatively, the power reduction priority may be preconfigured for each cell, for example, cell #1 to cell #4 have a descending power reduction priority.

[0362] In cell #1, the network device of cell #1 may know that cell #1 and cell #2 are sending beams on the same time-frequency resource. Because cell #1 has the highest power reduction priority, the network device of cell #1 reduces the transmission power of beam #1.

[0363] In cell #2, the network device of cell #2 may know that cell #1 and cell #2 are sending beams on the same time-frequency resource. Because cell #1 has the highest power reduction priority, the network device of cell #1 reduces the transmission power of beam #1, and based on this, the network device of cell #2 reduces the transmission power of beam #2.

[0364] In cell #3, the network device of cell #3 may know that cell #2 and cell #3 are sending beams on the same time-frequency resource. Because the power reduction priority of cell #2 is higher than the power reduction priority of cell #3, the network device of cell #2 reduces the transmission power of beam #2, and based on this, the network device of cell #3 reduces the transmission power of beam #3.

[0365] In cell #4, the network device of cell #4 may know that cell #3 and cell #4 are sending beams with the same time-frequency resource. Because the power reduction priority of cell #3 is higher than the power reduction priority of cell #4, the network device of cell #3 reduces the transmission power of beam #3, and based on this, the network device of cell #4 reduces the transmission power of beam #4.

[0366] Case 2:

[0367] As shown in Fig. 8b, five cells are used as an example. Cell #1 to Cell #5 send out beams in the same time-frequency resource (the beams of the five cells are denoted as Beam #1 to Beam #5, respectively). Beam #1 causes interference to Beam #2, Beam #2 causes interference to Beam #3 and Beam #5, Beam #3 causes interference to Beam #4, and Beam #4 causes interference to Beam #1. PL 12 is much larger than the thermal noise, and the PL 23 is much larger than the thermal noise, and the PL 25 is much larger than the thermal noise, and the PL 34 is much larger than the thermal noise, and the PL 41 is much larger than the thermal noise.

[0368] In cell #1, the network device of cell #1 sends out a beam with the same time-frequency resource as cell #1 and cell #2, and the PL 12 It may be known that is much larger than the thermal noise, in which case the network device of cell #1 reduces the transmit power of beam #1.

[0369] In cell #2, the network device of cell #2 sends out beams on the same time-frequency resources of cell #2, cell #3 and cell #5, and the PL 23 is much larger than the thermal noise, and the PL 25 It may be known that is much larger than the thermal noise, in which case the network device of cell #2 will reduce the transmit power of beam #2.

[0370] Both Cell #3 and Cell #4 are similar to Cell #1. The details will not be explained again.

[0371] In cell #5, the network device in cell #5 transmits beams on the same time-frequency resources as cell #2 and cell #5, and the PL 25 It can be known that PL is much larger than the thermal noise. In one manner, the network device of cell #5 reduces the transmission power of beam #5 to obtain the effect of reducing power consumption. In another manner, the network device of cell #5 may transmit beam #5 at a preset power, i.e., does not reduce the transmission power of beam #5. Since the network device of cell #2 reduces the transmission power of beam #2, PL 25 If the network device of cell #5 transmits beam #5 at the preset power, the speed at which the network device of cell #5 performs downlink data transmission increases.

[0372] Case 3:

[0373] As shown in Fig. 8c, five cells are used as an example. Cell #1 to Cell #5 send out beams in the same time-frequency resource (the beams of the five cells are denoted as Beam #1 to Beam #5, respectively). Beam #1 causes interference to Beam #2, Beam #2 causes interference to Beam #3, Beam #3 causes interference to Beam #4, Beam #4 causes interference to Beam #1, and Beam #5 causes interference to Beam #2. PL 12 is much larger than the thermal noise, and the PL 23 is much larger than the thermal noise, and the PL 25 is much larger than the thermal noise, and the PL 34 is much larger than the thermal noise, and the PL 41 is much larger than the thermal noise, and the PL 52 is much larger than the thermal noise.

[0374] In cell #1, the network device of cell #1 sends out a beam with the same time-frequency resource as cell #1 and cell #2, and the PL 12 It may be known that is much larger than the thermal noise, in which case the network device of cell #1 reduces the transmit power of beam #1.

[0375] In cell #2, the network device of cell #2 sends out a beam with the same time-frequency resource for cell #2 and cell #3, and the PL 23 It may be known that is much larger than the thermal noise, in which case the network device of cell #2 will reduce the transmit power of beam #2.

[0376] Both Cell #3 and Cell #4 are similar to Cell #1. The details will not be explained again.

[0377] In cell #5, the network device of cell #5 sends out beams on the same time-frequency resources as cell #5 and cell #2, and the PL 52 It may be known that is much larger than the thermal noise, in which case the network device of cell #5 will reduce the transmit power of beam #5.

[0378] Case 4:

[0379] As shown in Fig. 8d, three cells are used as an example. Cell #1 to Cell #3 send out beams in the same time-frequency resource (the beams of the three cells are denoted as Beam #1 to Beam #3, respectively). Beam #1 causes interference to Beam #2, Beam #2 causes interference to Beam #3, but Beam #3 does not cause interference to Beam #1. PL 12 is much larger than the thermal noise, and the PL 23 is much larger than the thermal noise.

[0380] In cell #1, the network device of cell #1 sends out a beam with the same time-frequency resource as cell #1 and cell #2, and the PL 12It may be known that is much larger than the thermal noise, in which case the network device of cell #1 reduces the transmit power of beam #1.

[0381] In cell #2, the network device of cell #2 sends out a beam with the same time-frequency resource for cell #2 and cell #3, and the PL 23 It may be known that is much larger than the thermal noise, in which case the network device of cell #2 will reduce the transmit power of beam #2.

[0382] In cell #3, the network device of cell #3 transmits beams on the same time-frequency resources as cell #2 and cell #3, and the PL 23 It can be seen that PL is much larger than the thermal noise. In one manner, the network device of cell #3 reduces the transmission power of beam #3 to obtain the effect of reducing power consumption. In another manner, the network device of cell #3 does not reduce the transmission power of beam #3. Since the network device of cell #2 reduces the transmission power of beam #2, PL 23 If the network device of cell #3 does not reduce the transmission power of beam #3, the speed at which the network device of cell #3 performs downlink data transmission increases.

[0383] 9 shows a method 900 according to the present application. The method 900 includes the following steps.

[0384] S910: The network device determines whether a first condition is met.

[0385] In a possible case, the first condition is that there is a second time-frequency resource that overlaps between the time-frequency resource for transmitting the first beam and the time-frequency resource for transmitting the second beam, and the ratio of the interference of the first beam to the second beam and the noise floor of the receiver is greater than a first threshold, and the ratio of the interference of the second beam to the first beam and the noise floor of the receiver is greater than a first threshold.

[0386] It should be understood that the first beam corresponds to a first data stream and the second beam corresponds to a second data stream. Thus, the first condition may be understood to be that the inter-stream interference is much greater than the noise floor of the receiver.

[0387] In another possible case, the first condition is that there is a second time-frequency resource that overlaps between the time-frequency resource for sending the first beam and the time-frequency resource for sending the second beam, and the interference of the first beam to the second beam is much greater than the noise floor of the receiver and the interference of the neighboring cells, and the interference of the second beam to the first beam is much greater than the noise floor of the receiver and the interference of the neighboring cells. That is, the first condition may be understood to be that the inter-stream interference is much greater than the sum of the noise floor of the receiver and the interference of the neighboring cells.

[0388] Depending on the source of inter-stream interference, it is known that the inter-stream interference is mainly related to the inter-stream residual correlation and the channel time-frequency correlation. The inter-stream interference can be determined by calculating the inter-stream residual correlation and the channel time-frequency correlation.

[0389] Inter-stream residual correlation:

[0390] Although a network device needs to transmit multiple data streams, the network device generally cannot know the downlink channel information accurately. This is mainly determined by two factors. First, in a frequency division duplex system, the downlink channel information may be obtained using a feedback signaling method at the receiving end, which causes the channel information to be lost; second, due to the feedback delay, the current channel state is generally predicted based on the previous channel state, and there is a certain difference between these two channel states. Due to these two factors, there exists residual interference between multiple data streams.

[0391] Channel time-frequency correlation:

[0392] When the channel difference between different subcarriers in the same resource block group (RBG) is large, it is considered that inter-stream interference may occur. In addition, inter-stream interference may occur due to channel time variation (channel aging).

[0393] It should be further understood that the first data stream and the second data stream may be different data streams for a same terminal device of the network device, or different data streams for different terminal devices of the network device, but this is not limited thereto.

[0394] S920: When a first condition is satisfied, the network device reduces the transmit power of the first beam and the transmit power of the second beam in the second time-frequency resource.

[0395] In one scheme, the reduction amplitude of the transmission power of the first beam is the same as the reduction amplitude of the transmission power of the second beam, and in another scheme, the reduction amplitude of the transmission power of the first beam is different from the reduction amplitude of the transmission power of the second beam.

[0396] When the reduction amplitude of the transmission power of the first beam is the same as the reduction amplitude of the transmission power of the second beam, the power reduction amplitude may be determined in the following manner.

[0397] Method 1:

[0398] The power reduction amplitude (denoted as Δ) may be determined using the following equation: Δ=min(I 12 -N,I 21 -N), where I 12 is the interference of the first beam with the second beam, and I 21 is the interference of the second beam to the first beam and N is the noise floor of the receiver.

[0399] Method 2:

[0400] The power reduction amplitude may be determined using the following equation: Δ=min(I 12 -NX,I 21 -NX), where X is the reserved power.

[0401] In one example, the network device sends data to UE#1 using a first beam and sends data to UE#2 using a second beam. In addition, UE#1 and UE#2 perform multi-user (MU) pairing in resource block group (RBG) #1. If the first beam and the second beam satisfy a first condition in RBG#1, the network device reduces the transmission power of the first beam and the transmission power of the second beam in RBG#1.

[0402] According to the solution of the present application, when the two beams sent by the network device meet the first condition, the network device reduces the transmission power of the two beams. In this way, the power consumption of the network device can be reduced, and the impact on the signal-to-interference-and-noise ratio can be reduced. This ensures the communication performance of the network device.

[0403] According to the above-mentioned method, a communication device according to an embodiment of the present application is shown in FIG.

[0404] The transceiver unit 1001 may be configured to implement corresponding communication functions. The transceiver unit 1001 may also be referred to as a communication interface or a communication unit. The processing unit 1002 may be configured to perform processing operations.

[0405] Optionally, the device further includes a storage unit. The storage unit may be configured to store instructions and / or data. The processing unit 1002 may read the instructions and / or data in the storage unit so that the device implements the device actions of the method embodiments described above.

[0406] In the first design, the device may be the centralized control node of previous embodiments or a component (eg, a chip) of the centralized control node.

[0407] The transceiver unit and the processing unit may be configured to implement the relevant operations of the centralized control node of the above described method embodiments.

[0408] In the second design, the apparatus may be the first network device of the previous embodiments or may be a component (eg, a chip) of the first network device.

[0409] The transceiver unit and the processing unit may be configured to implement the relevant operations of the first network device of the aforementioned method embodiments.

[0410] In the third design, the apparatus may be the second network device of the previous embodiments or may be a component (eg, a chip) of the second network device.

[0411] The transceiver unit and the processing unit may be configured to implement relevant operations of the second network device of the aforementioned method embodiments.

[0412] In the fourth design, the apparatus may be a network device as in the previous embodiments or may be a component (eg, a chip) of a network device.

[0413] The transceiver unit and the processing unit may be configured to implement the relevant operations of the network device of the aforementioned method embodiments.

[0414] It should be understood that the specific processes by which the units perform the above corresponding steps have been described in detail in the above method embodiments, and for the sake of brevity, the details will not be described herein.

[0415] It should also be understood that the apparatus herein is presented in the form of a functional unit. The term "unit" herein may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor) configured to execute one or more software or firmware programs, a memory, a merged logic circuit, and / or another suitable component supporting the described functionality. In an optional example, a person skilled in the art may understand that the apparatus may be specifically the first network element of the aforementioned embodiment and may be configured to perform the procedures and / or steps corresponding to the first network element of the aforementioned method embodiment. Alternatively, the apparatus may be specifically the network management network element of the aforementioned embodiment and may be configured to perform the procedures and / or steps corresponding to the network management network element of the aforementioned method embodiment. To avoid repetition, the details will not be described again herein.

[0416] The aforementioned communication device has functions for implementing corresponding steps performed by the device in the aforementioned method. The functions may be implemented by hardware, or may be implemented by executing corresponding software by the hardware. The hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the transceiver unit may be replaced by a transceiver (e.g., the sending unit of the transceiver unit may be replaced by a transmitter, and the receiving unit of the transceiver unit may be replaced by a receiver), and another unit such as a processing unit may be replaced by a processor, so that the sending and receiving operations and the associated processing operations of the method embodiment are separately implemented.

[0417] In addition, the transceiver unit 1001 may alternatively be a transceiver circuit (eg, may include a receiving circuit and a transmitting circuit) and the processing unit may be a processing circuit.

[0418] It should be noted that the device in FIG. 10 may be the device of the above method embodiment, or may be a chip or a chip system, such as a system on a chip (SoC). The transceiver unit may be an input / output circuit or a communication interface. The processing unit is a processor, a microprocessor, or an integrated circuit integrated on a chip. This is not limited in this specification.

[0419] An embodiment of the present application further provides a communication device. As shown in Fig. 11, the communication device includes a processor 1101 and a communication interface 1102. The processor 1101 is configured to execute a computer program or instruction stored in a memory 1103 or to read data stored in the memory 1103 to implement the method of the above method embodiment. Optionally, there are one or more processors 1101. The communication interface 1102 is configured to receive and / or send signals. For example, the processor 1101 is configured to control the communication interface 1102 to receive and / or send signals.

[0420] Optionally, as shown in Figure 11, the communication device further includes a memory 1103, which is configured to store computer programs or instructions and / or data. The memory 1103 may be integrated with the processor 1101 or located separately. Optionally, there are one or more memories 1103.

[0421] Optionally, the processor 1101, the communication interface 1102, and the memory 1103 are connected to each other via a bus 1104. The bus 1104 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, etc. The bus 1104 may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used to represent a bus in FIG. 11, but this does not mean that there is only one bus or only one type of bus.

[0422] For example, the processor 1101 is configured to execute computer programs or instructions stored in the memory 1103 to implement the relevant operations of the network device of the method embodiments described above.

[0423] In another example, the processor 1101 is configured to execute computer programs or instructions stored in the memory 1103 to implement the relevant operations of the centralized control node of the method embodiments described above.

[0424] It should be understood that a processor (such as the processor 1101) referred to in the embodiments of the present application may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and a NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic logic array (GAL), or any combination thereof.

[0425] It may be further understood that the memory (such as memory 1103) referred to in the embodiments of the present application may be volatile or non-volatile memory, or may include volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be random access memory (RAM) used as an external cache.

[0426] Those skilled in the art may recognize that the units and algorithm steps may be implemented by electronic hardware or a combination of computer software and electronic hardware in combination with the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or software depends on the design constraints of a specific application and technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementations are not considered to go beyond the scope of this application.

[0427] For the sake of convenience and concise description, the detailed operation processes of the above-mentioned systems, devices and units may be clearly understood by those skilled in the art by referring to the corresponding processes in the above-mentioned method embodiments, and the details will not be described again in this specification.

[0428] In some embodiments provided in the present application, it should be understood that the disclosed system, device and method may be implemented in other manners. For example, the described device embodiment is merely an example. For example, the division into units is merely a logical functional division, and may be other divisions in actual implementation. For example, multiple units or components may be combined or integrated to become another system, or some features may be ignored or not implemented. In addition, the shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electronic, mechanical, or other forms.

[0429] The units described as separate parts may or may not be physically separated, and the parts presented as units may or may not be physical units, may be located in one location, or may be distributed among multiple network units. Some or all of the units may be selected based on the actual requirements to achieve the objectives of the solutions of the embodiments.

[0430] In addition, the functional units of the embodiments of the present application may be integrated into one processing unit, each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0431] When a function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on such understanding, the essential technical solution of the present application, or a part contributing to the prior art, or a part of the technical solution, may be implemented in the form of a software product. The software product is stored in a storage medium and includes some instructions for instructing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0432] The above description is merely a specific implementation of the present application, and does not limit the scope of protection of the present application. Any variations or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the scope of protection of the claims.

Claims

1. 1. A method for power control, the method comprising: determining whether a first condition is satisfied, the first condition including: a time-frequency resource for transmitting a first beam and a time-frequency resource for transmitting a second beam overlap; a ratio of interference of the first beam with the second beam to a noise floor of a receiver is greater than a first threshold; and a ratio of interference of the second beam with the first beam to the noise floor of the receiver is greater than the first threshold; reducing a transmission power of the first beam and a transmission power of the second beam when the first condition is satisfied; A method comprising:

2. The method comprises: determining whether a second condition is satisfied, the second condition including that the time-frequency resources for transmitting the first beam and the time-frequency resources for transmitting a third beam overlap and a ratio of interference of the first beam to the third beam and the noise floor of the receiver is greater than the first threshold; reducing a transmission power of the third beam when the second condition is satisfied; The method of claim 1 further comprising:

3. 3. The method of claim 2, wherein the method is applicable to a system comprising a first network device, a second network device, and a third network device, the first network device configured to transmit the first beam, the second network device configured to transmit the second beam, and the third network device configured to transmit the third beam.

4. The step of determining whether a first condition is satisfied comprises: determining, by the first network device and the second network device, whether the first condition is satisfied; The step of reducing a transmission power of the first beam and a transmission power of the second beam when the first condition is satisfied includes: reducing, by the first network device, the transmission power of the first beam when the first condition is satisfied; and reducing, by the second network device, the transmission power of the second beam. The method of claim 3 , comprising:

5. The step of determining whether the first condition is satisfied by the first network device and the second network device comprises: sending, by the first network device, first information to the second network device, the first information including the time-frequency resources used by the first network device to send the first beam and the interference of the second beam with the first beam; sending, by the second network device, second information to the first network device, the second information including the time-frequency resources used by the second network device to send the second beam and the interference of the first beam with the second beam; determining whether the first condition is satisfied by the first network device and the second network device based on the first information and the second information; The method of claim 4 , comprising:

6. The step of determining whether a second condition is satisfied comprises: determining, by the third network device, whether the second condition is satisfied; The step of reducing the transmission power of the third beam when the second condition is satisfied includes:

4. The method of claim 3, comprising reducing, by the third network device, the transmit power of the third beam when the second condition is satisfied.

7. 3. The method of claim 2, wherein the method is applicable to a system comprising a centralized control node, a first network device, a second network device, and a third network device, the centralized control node being configured to manage the first network device, the second network device, and the third network device, the first network device being configured to transmit the first beam, the second network device being configured to transmit the second beam, and the third network device being configured to transmit the third beam.

8. The step of determining whether a first condition is satisfied comprises: determining, by the centralized control node, whether the first condition is satisfied; The step of reducing a transmission power of the first beam and a transmission power of the second beam when the first condition is satisfied includes:

8. The method of claim 7, comprising: sending, by the centralized control node, first indication information to the first network device and second indication information to the second network device when the first condition is satisfied, the first indication information indicating to reduce the transmit power of the first beam and the second indication information indicating to reduce the transmit power of the second beam.

9. The step of determining whether a second condition is satisfied comprises: determining, by the centralized control node, whether the second condition is satisfied; The step of reducing the transmission power of the third beam when the second condition is satisfied includes:

8. The method of claim 7, further comprising: sending, by the centralized control node, a third indication information to the third network device when the second condition is satisfied, the third indication information indicating to reduce the transmit power of the third beam.

10. 10. The method according to claim 1, wherein the reduced amplitude of the transmission power of the first beam is the same as the reduced amplitude of the transmission power of the second beam.

11. A communication device comprising a unit adapted to carry out the method according to any one of claims 1 to 10.

12. A communications device comprising a communications interface and a processor, the processor being configured to execute a computer program or instructions such that the communications device performs a method according to any one of claims 1 to 10.

13. A computer readable storage medium containing a computer program or instructions, which when said computer program or instructions are run on a computer, enables said computer to carry out a method according to any one of claims 1 to 10.

14. A computer program product comprising instructions, which when run on a computer enable the computer to perform the method of any one of claims 1 to 10.

15. A communication system comprising a first network device and a second network device, the first network device and the second network device configured to perform the method of claim 1.

16. The method of claim 15 , wherein the communication system further comprises a third network device, the third network device configured to perform the method of claim 2 .

17. 3. A communication system comprising a centralized control node, a first network device, a second network device and a third network device, the centralized control node being configured to perform the method according to claim 1 or 2.

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