CN111698068B

CN111698068B - Remote interference management method and device

Info

Publication number: CN111698068B
Application number: CN201910364101.XA
Authority: CN
Inventors: 郝金平; 晋英豪; 杨水根; 张宏卓
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-12
Filing date: 2019-04-30
Publication date: 2022-02-18
Anticipated expiration: 2039-04-30
Also published as: AU2020234441A1; AU2020234441B2; CN111698068A

Abstract

A remote interference management method and device are used for solving the problem of cell performance loss when remote interference management is implemented. The method comprises the following steps: the method comprises the steps that a first network device receives a Reference Signal (RS) sent by a second network device, and the RS is used for indicating that the second network device is subjected to remote interference. The first network device determines first assistance information and sends the first assistance information to the second network device. The first assistance information includes at least one of: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information of the downlink transmission of the first network device.

Description

Remote interference management method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for remote interference management.

Background

Under special atmospheric conditions, electromagnetic waves propagating in the atmosphere are influenced by atmospheric refraction, the propagation track of the electromagnetic waves bends to the ground, and when the curvature exceeds the curvature of the earth surface, the electromagnetic waves are partially trapped in an atmospheric thin layer with a certain thickness, just like the electromagnetic waves propagate in a waveguide, and the phenomenon is called an atmospheric waveguide phenomenon. In addition, due to the existence of the atmospheric waveguide phenomenon, a downlink signal transmitted from a base station in the area a may propagate to the area B. Wherein, the distance between the area B and the area A can reach 300 kilometers. If the base station in zone B is scheduling uplink transmissions, the downlink signal propagating from zone a to zone B may cause interference to the uplink transmissions of the base station in zone B. Generally, such interference is referred to as Remote Interference (RI). The area a is an interference source (accumulator) area, and the area B is an interfered area (victim).

One commonly used Remote Interference Management (RIM) method is to implement a scheme for removing remote interference at a base station in a traffic area. Specifically, if the base station in the victim area implements a scheme for eliminating remote interference on the frequency, the base station needs to measure the interfered status of the entire available frequency band first, and then selects an undisturbed available frequency point to schedule uplink transmission. If the scheme for eliminating the remote interference is implemented in the time domain, the base station needs to continuously monitor whether the remote interference exists and then schedule uplink transmission on the symbols without interference. Therefore, the base station in the victim area needs to monitor first and then transmit, but this increases resource consumption of the base station in the victim area, wastes base station resources, and loses cell performance.

Disclosure of Invention

The application provides a remote interference management method and a remote interference management device, which are used for solving the problem of cell performance loss during remote interference management.

In a first aspect, a remote interference management method according to an embodiment of the present application includes: the method comprises the steps that a first network device receives a Reference Signal (RS) sent by a second network device, and the RS is used for indicating that the second network device is subjected to remote interference. The first network device determines first assistance information and sends the first assistance information to the second network device. The first assistance information includes at least one of: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information of the downlink transmission of the first network device. In the embodiment of the present application, a network device in an interference source region (i.e., a first network device) sends first auxiliary information to a network device in an interfered region (i.e., a second network device), so that the network device in the interfered region can avoid a transmission resource indicated by the first auxiliary information to select an available frequency point, a symbol, a beam direction, and the like, so as to reduce an influence of remote interference on uplink transmission. By the method, the network equipment in the interfered area does not need to continuously monitor interference, and remote interference can be directly eliminated, so that the resource consumption for monitoring by the network equipment in the interfered area can be reduced, and the cell performance of the interfered area is ensured.

In a possible design, the frequency domain information of the downlink transmission resource of the first network device may include at least one downlink SSB frequency point; or, the frequency domain information of the downlink transmission resource of the first network device may include at least one downlink SSB frequency point and at least one downlink transmission bandwidth configuration. Through the design, the second network device can determine the frequency range of the remote interference generated by the first network device according to the downlink SSB frequency point and the downlink transmission bandwidth configuration of the first network device, so that the second network device can avoid the frequency range to schedule uplink transmission, and the influence of the remote interference on the uplink transmission is reduced.

In a possible design, the time domain information of the downlink transmission resource of the first network device may include at least one slot format (slot format) configuration. Through the design, after receiving the first auxiliary information, the second network device can determine the symbol occupied by the downlink transmission of the first network device according to the time slot format configuration of the first network device, so that the second network device can determine the symbol occupied by the downlink transmission of the first network device to schedule the uplink transmission of the second network device according to the symbol occupied by the downlink transmission of the first network device, and the influence of remote interference on the uplink transmission is reduced.

In one possible design, the beam information transmitted by the first network device in downlink may include at least one downlink beam configuration. Through the design, the second network device can determine the uplink beam at the second network device after receiving the first auxiliary information, for example, the second network device can determine the direction subjected to remote interference when determining that the second network device is subjected to remote interference, so that after receiving the first auxiliary information, the signal direction range from the first network device can be determined by combining the direction subjected to remote interference and the downlink beam configuration of the first network device, and the uplink beam at the second network device can be determined, thereby avoiding the process that the second network device needs to monitor in each direction and then determine the uplink beam, and further saving the resource overhead of the second network device.

In one possible design, the sending, by the first network device, the first assistance information to the second network device may include: and the first network equipment sends a first message to the second network equipment, wherein the first message is used for informing the second network equipment that the first network equipment receives the RS, and the first message carries the first auxiliary information. Compared with the prior art in which the second network device continuously monitors interference, in the above design, the first network device may send the first auxiliary information to the second network device through the first message, so that the second network device may determine an interference condition, and thus, elimination of remote interference may be directly implemented, which may reduce resource consumption of the second network device for monitoring.

In one possible design, the sending, by the first network device, the first assistance information to the second network device may include: the first network device may periodically send the first assistance information to the second network device. In the design, the first network device sends the first auxiliary information to the second network device periodically, so that the real-time performance of the first auxiliary information can be improved, the second network device can perform remote interference management based on the first auxiliary information with higher real-time performance, and the accuracy of the remote interference management can be improved.

In one possible design, the sending, by the first network device, the first assistance information to the second network device may include: the first network device sends the first auxiliary information to the second network device when downlink configuration information of the first network device is updated, where the downlink configuration information includes at least one of the following information: downlink SSB frequency point configuration, downlink transmission bandwidth configuration, time slot format configuration and downlink wave beam configuration. In the above design, the first network device sends the first auxiliary information to the second network device when the downlink configuration information is updated, so that the second network device can update the first auxiliary information in time, and the accuracy of remote interference management can be further improved. In addition, the first network device sends the first auxiliary information when the downlink configuration information is updated, so that the signaling overhead can be reduced, and the network resources can be saved.

In one possible design, the first network device may further receive second assistance information sent by the second network device, where the second assistance information includes at least one of the following information: frequency domain information corresponding to the uplink transmission resource of the second network device, frequency domain information of the uplink transmission resource of the second network device subjected to interference in a frequency domain, the number of interfered symbols in a time domain of the uplink transmission resource of the second network device, time slot format configuration of the second network device, and beam information of uplink transmission scheduled by the second network device. In the above design, the first network device may determine, according to the second assistance information sent by the second network device, the transmission resource subjected to remote interference by the second network device, so that a scheme may be adopted for the transmission resource subjected to remote interference to reduce the remote interference.

In a possible design, the first network device may further stop performing downlink transmission on a first transmission resource or reduce power of performing downlink transmission on the first transmission resource, where the first transmission resource is a transmission resource corresponding to the second auxiliary information. In the above design, after determining the transmission resource subjected to remote interference by the second network device, the first network device may reduce or stop downlink transmission on the transmission resource, so as to reduce remote interference to the second network device.

In a possible design, if the second auxiliary information includes frequency domain information corresponding to the uplink transmission resource of the second network device or frequency domain information that the uplink transmission resource of the second network device is interfered in a frequency domain, the frequency domain range of the first transmission resource may be a frequency domain range indicated by the second auxiliary information. In the above design, the first network device may reduce the remote interference to the second network device by avoiding the frequency domain resource used by the second network device for scheduling the uplink transmission.

In a possible design, if the second assistance information includes the number of symbols of the uplink transmission resource of the second network device that are interfered in the time domain or the timeslot format configuration of the second network device, the symbols of the first transmission resource in the time domain may be symbols determined according to the symbols indicated by the second assistance information. In the above design, the first network device adjusts the symbols for downlink transmission according to the number of the symbols interfered by the uplink transmission resource of the second network device in the time domain or the timeslot format configuration of the second network device, so as to reduce remote interference to the second network device.

In a possible design, if the second auxiliary information includes beam information for scheduling uplink transmission by the second network device, the beam corresponding to the first transmission resource is a beam determined according to the second auxiliary information. In the above design, the first network device may reduce remote interference to the second network device by determining the downlink beam at the first network device according to the uplink beam configuration of the second network device.

In one possible design, the first network device may be a first Distributed Unit (DU).

In one possible design, the second network device is a second DU.

In one possible design, the first DU sends the first side information to a second CU or second CU-CP connected to the second DU through the first CU or first CU-CP connected to the first DU.

In one possible design, the first DU receives the second DU through its connected first CU or first CU-CP and sends the second side information through the second DU connected second CU or second CU-CP.

In a second aspect, a remote interference management method according to an embodiment of the present application includes: the method comprises the steps that a second network device receives a first message sent by a first network device, wherein the first message is used for informing the second network device that the first network device receives a Reference Signal (RS), and the RS is used for indicating that the second network device is subjected to remote interference. The second network device determines second assistance information, which includes at least one of: frequency domain information corresponding to the uplink transmission resource of the second network device, frequency domain information of the uplink transmission resource of the second network device subjected to interference in a frequency domain, the amount of the uplink transmission resource of the second network device subjected to interference in a time domain, time slot format configuration of the second network device, and beam information of uplink transmission scheduled by the second network device. The second network device sends the second assistance information to the first network device. In the embodiment of the present application, the network device in the interfered area (i.e., the second network device) sends the auxiliary information to the network device in the interference source area (i.e., the first network device), so that the network device in the interference source area can stop or reduce downlink transmission in the directions of frequency points, symbols, and beams generating remote interference, and thus the network device in the interference area can directly implement elimination of the remote interference. In addition, compared with the method in which the network device in the interfered area carries corresponding information in the RS signal, in the embodiment of the present application, the second network device may send the auxiliary information through a wired link, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network, so that the integrity of the second auxiliary information may be ensured. In addition, compared with the adoption of static configuration, such as the configuration of longer uplink and downlink time intervals of an interference source region and an interfered region, or the configuration of a mode that different frequencies are respectively adopted for downlink of the interference source region and uplink of the interfered region, the embodiment of the application can effectively reduce the loss of the cell performance.

In a possible design, the frequency domain information corresponding to the uplink transmission resource of the second network device may include a synchronization signal block SSB frequency point for scheduling uplink transmission; or the frequency domain information corresponding to the uplink transmission resource of the second network device includes an SSB frequency point for scheduling uplink transmission and a transmission bandwidth configuration. In the above design, the second network device sends the second auxiliary information to the first network device, so that the first network device may determine the frequency domain range in which the second network device schedules uplink transmission, and thus the first network device may adopt a scheme for eliminating remote interference in the frequency domain range.

In one possible design, the sending, by the second network device, the second assistance information to the first network device may include: the second network device periodically transmits the second assistance information to the first network device. In the design, the second network device sends the second auxiliary information to the first network device periodically, so that the real-time performance of the second auxiliary information can be improved, the first network device can perform remote interference management based on the second auxiliary information with higher real-time performance, and the accuracy of the remote interference management can be improved.

In one possible design, the sending, by the second network device, the second assistance information to the first network device may include: the second network device sends the second auxiliary information to the first network device when the uplink configuration information of the second network device is updated, where the uplink configuration information includes at least one of the following information: the method comprises the steps of uplink SSB frequency point configuration, uplink transmission bandwidth configuration, time slot format configuration and uplink beam configuration. In the design, the second network device sends the second auxiliary information to the first network device when the uplink configuration information is updated, so that the first network device can update the second auxiliary information in time, and the accuracy of remote interference management can be improved. In addition, the second network device sends the second auxiliary information when the uplink configuration information is updated, so that the signaling overhead can be reduced, and the network resources can be saved.

In one possible design, the sending, by the second network device, the second assistance information to the first network device may include: and the second network equipment sends the second auxiliary information to the first network equipment after receiving the first message. In the above design, the second network device sends the second auxiliary information to the first network device through the wired link after receiving the first message, and compared with a mode that the second network device carries the second auxiliary information in the RS, the integrity of the second auxiliary information can be ensured.

In one possible design, the second network device may further receive first assistance information sent by the first network device, where the first assistance information includes at least one of the following information: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information of the downlink transmission of the first network device. In the above design, the second network device may determine, according to the first auxiliary information, a transmission resource used by the first network device for downlink transmission, so that the second network device may avoid the transmission resource to schedule uplink transmission, so as to reduce an influence of remote interference on uplink transmission.

In a possible design, the time domain information corresponding to the downlink transmission resource of the first network device may include at least one slot format configuration. Through the design, after receiving the first auxiliary information, the second network device can determine the symbol occupied by the downlink transmission of the first network device according to the time slot format configuration of the first network device, so that the second network device can determine the symbol occupied by the downlink transmission of the first network device to schedule the uplink transmission of the second network device according to the symbol occupied by the downlink transmission of the first network device, and the influence of remote interference on the uplink transmission is reduced.

In one possible design, the downlink beam information of the first network device may include at least one downlink beam configuration. Through the above design, the second network device may determine the uplink beam at the second network device after receiving the first auxiliary information, for example, the second network device may determine the signal direction range from the first network device according to the location information of the first network device in combination with the downlink beam configuration of the first network device, so as to determine the uplink beam at the second network device, thereby avoiding a process in which the second network device needs to monitor first and then determine the uplink beam in each direction, and further saving the resource overhead of the second network device.

In one possible design, the second network device may schedule uplink transmission on a first transmission resource, where the first transmission resource is a transmission resource other than a second transmission resource, and the second transmission resource is a transmission resource corresponding to the first auxiliary information. In the above design, after determining the transmission resource used by the first network device for downlink, the second network device may schedule uplink transmission on the transmission resource other than the transmission resource, so as to reduce the influence of remote interference on uplink transmission.

In a possible design, if the first auxiliary information includes frequency domain information of downlink transmission resources of the first network device, the frequency point of the first transmission resource may be any frequency point except a frequency domain range indicated by the first auxiliary information. In the above design, after determining the frequency domain range used by the first network device for downlink transmission, the second network device may reduce the influence of the remote interference on the second network device by scheduling uplink transmission at other frequencies outside the frequency domain range.

In a possible design, if the first auxiliary information includes time domain information of a downlink transmission resource of the first network device, a symbol of the first transmission resource in a time domain is a symbol determined according to a symbol indicated by the first auxiliary information. In the above design, after determining the symbol occupied by the downlink transmission of the first network device, the second network device determines the symbol of the uplink transmission scheduled by the second network device according to the symbol occupied by the downlink transmission of the first network device, so that the influence of remote interference on the second network device can be reduced.

In a possible design, if the first auxiliary information includes beam information transmitted by the first network device in a downlink, the beam corresponding to the first transmission resource is a beam determined according to the first auxiliary information. In the above design, the second network device may determine the direction subjected to the remote interference when determining that the second network device is subjected to the remote interference, so that after receiving the first auxiliary information, the signal direction range from the first network device may be determined by combining the direction subjected to the remote interference and the downlink beam information of the first network device, thereby determining the uplink beam at the second network device, thereby avoiding a process that the second network device needs to monitor in each direction first and then determine the uplink beam, and further saving the resource overhead of the second network device.

In one possible design, the first network device may be a first DU.

In one possible design, the second network device is a second DU.

In one possible design, the second DU receives the first message sent by the first DU through the first CU or first CU-CP to which the first DU is connected through its connected second CU or second CU-CP.

In one possible design, the second DU sends the second side information to the first CU or first CU-CP connected to the first DU through the second CU or second CU-CP connected to the second DU.

In a third aspect, a remote interference management method according to an embodiment of the present application includes: the method comprises the steps that a first distribution unit reports an interference strength indication to an operation maintenance management device, wherein the first distribution unit is any one of at least one distribution unit, so that the operation maintenance management device divides the at least one distribution unit into at least one distribution unit group according to the interference strength indication reported by the at least one distribution unit. The first distribution unit receives a distribution unit group identifier sent by an operation maintenance management device, wherein the distribution unit group identifier is an identifier of a distribution unit group in which the first distribution unit is located. The distribution unit sends the distribution unit group identification to a concentration unit. In the embodiment of the present application, the distribution unit sends the distribution unit group identifier to the central unit, so that the CU can determine the grouping condition of the connected DUs. Through the above manner, the CU in the interfered area can determine the grouping situation of the connected DUs, so that information interaction can be performed between the radio access network device in the interference source area and the radio access network device in the interfered area through the CUs.

In a fourth aspect, a remote interference management method according to an embodiment of the present application includes: and the operation maintenance management equipment divides at least one distribution unit into at least one distribution unit group according to the interference strength indication reported by the at least one distribution unit. And the operation maintenance management equipment sends grouping information to a centralized unit, wherein the grouping information comprises the identification of the distribution unit group and the identification of the distribution unit connected with the centralized unit in the distribution unit group. In the embodiment of the present application, the operation maintenance management device sends the grouping information to the central unit, so that the CU can determine the grouping condition of the connected DUs. Through the above manner, the CU in the interfered area can determine the grouping situation of the connected DUs, so that information interaction can be performed between the radio access network device in the interference source area and the radio access network device in the interfered area through the CUs.

In a fifth aspect, the present application provides a remote interference management apparatus, which may be a network device, or a chip or a chipset in the network device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the apparatus may further include a storage unit, which may be a memory; the storage unit is configured to store an instruction, and the processing unit executes the instruction stored in the storage unit to enable the network device to perform the corresponding function in the first aspect, or executes the instruction stored in the storage unit to enable the network device to perform the corresponding function in the second aspect. When the apparatus is a chip or a chipset within a network device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes an instruction stored in the storage unit to cause the network device to perform the corresponding function in the first aspect, or the processing unit executes an instruction stored in the storage unit to cause the network device to perform the corresponding function in the second aspect, where the storage unit may be a storage unit (e.g., a register, a cache, etc.) in the chip or the chipset, or a storage unit (e.g., a read-only memory, a random access memory, etc.) outside the chip or the chipset in the terminal device.

In a sixth aspect, a remote interference management apparatus is provided, including: a processor, a communication interface, and a memory. The communication interface is used for transmitting information, and/or messages, and/or data between the device and other devices. The memory is configured to store computer executable instructions, and when the apparatus is running, the processor executes the computer executable instructions stored in the memory, so as to enable the apparatus to perform the remote interference management method according to the first aspect or any one of the first aspects, or the remote interference management method according to any one of the second aspects or the second aspects.

In a seventh aspect, the present application further provides a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the above aspects.

In an eighth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

In addition, the application provides another remote interference management method and device, which are used for solving the problem of communication addressing between the interference source area network device and the interfered area network device when remote interference management is implemented.

In a ninth aspect, a remote interference management method according to an embodiment of the present application includes: a first Distribution Unit (DU) receives a Reference Signal (RS) sent by a second DU, wherein the RS is used for indicating that the second DU is subjected to remote interference, the RS comprises a second distribution unit identifier of the second DU, and the second distribution unit identifier is used for identifying a distribution unit group to which the second DU belongs; the first DU sends a first message to a first centralized unit CU or a first centralized unit control plane CU-CP connected to the first DU, the first message including the second distribution unit group identification.

In the embodiment of the application, the DU in the interference source area carries the second distribution unit group identifier in the first message, so that the signaling overhead between the DU and the CU or CU-CP connected with the DU is reduced.

In one possible design, the first message further includes at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

In one possible design, the first assistance information includes at least one of the following information: frequency domain information of downlink transmission resources of the first DU, time domain information of the downlink transmission resources of the first DU, and beam information of downlink transmission of the first DU.

In a tenth aspect, a remote interference management method according to an embodiment of the present application includes: a first network node receives a first message sent by a first Distribution Unit (DU), wherein the first message comprises a second distribution unit identifier, the second distribution unit identifier carries a Reference Signal (RS) sent by a second DU received by the first DU, and the second distribution unit identifier is used for identifying a distribution unit group to which the second DU belongs; the first network node determines a second centralized unit CU or a second centralized unit control plane CU-CP connected with the second DU according to the second distribution unit group identifier; the first network node determines a second message according to the first message; and the first network node sending the second message to the second CU or the second CU-CP.

In the embodiment of the application, the CU or CU-CP connected with the DU in the interference source area determines the identifier or the address of the CU or CU-CP connected with the DU in the interfered area from the second distribution unit group identifier, so that data can be accurately transmitted to the network equipment in the interfered area.

In one possible design, the method includes: the second message includes the second distribution unit identification.

In one possible design, at least one of the first message and the second message further includes a first distribution unit identifier for identifying a distribution unit group to which the first DU belongs.

In one possible design, at least one of the first message and the second message further includes at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

In one possible design, the determining, by the first network node, a second concentration unit CU or a second concentration unit control plane CU-CP to which the second DU is connected based on the second distribution unit group identification includes: and the first network node determines the identification or address of a second CU or a second CU-CP connected with the second DU according to the second distribution unit group identification.

In one possible design, the first network node is a first CU or a first CU-CP connected to the first DU.

In an eleventh aspect, a remote interference management method according to an embodiment of the present application includes: a second distribution unit DU receives, through a second central unit CU or a second central unit control plane CU-CP connected to a second DU, a second message sent by a first CU or a first CU-CP connected to the first DU, where the second message includes a first distribution unit identifier of the first DU, and the first distribution unit identifier is used to identify a distribution unit group to which the first DU belongs; the second DU sends a third message to a second CU or a second CU-CP connected with the second DU, wherein the third message comprises the first distribution unit group identification.

In the embodiment of the present application, the DU in the interfered area carries the first distribution unit identifier in the third message, thereby reducing the signaling overhead between the DU and the CU or CU-CP connected to the DU.

In one possible design, the third message includes second assistance information that includes at least one of: frequency domain information corresponding to the uplink transmission resource of the second DU, frequency domain information that the uplink transmission resource of the second DU is interfered in a frequency domain, the number of symbols that the uplink transmission resource of the second DU is interfered in a time domain, slot format configuration of the second DU, and beam information that the second DU schedules uplink transmission.

In one possible design, the second message includes at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

In a twelfth aspect, a remote interference management method according to an embodiment of the present application includes: a second network node receives a third message sent by a second distribution unit DU, where the third message includes a first distribution unit identifier, the first distribution unit identifier is carried in a second message received by the second DU from a first DU, and the first distribution unit identifier is used to identify a distribution unit group to which the first DU belongs; the second network node determines a first concentration unit CU or a first concentration unit control plane CU-CP connected with the first DU according to the first distribution unit group identifier; the second network node determines a fourth message according to the third message; and the second network node sending the fourth message to the first CU or the first CU-CP.

In the embodiment of the application, the CU or CU-CP connected with the DU in the interfered area determines the identifier or the address of the CU or CU-CP connected with the DU in the interfered area from the first distribution unit group identifier, so that data can be accurately transmitted to the network equipment of the interference source area.

In one possible design, the method includes: the fourth message includes the first distribution unit identification.

In one possible design, at least one of the third message and the fourth message includes second assistance information.

In one possible design, the second assistance information includes at least one of the following information: frequency domain information corresponding to the uplink transmission resource of the second DU, frequency domain information that the uplink transmission resource of the second DU is interfered in a frequency domain, the number of symbols that the uplink transmission resource of the second DU is interfered in a time domain, slot format configuration of the second DU, and beam information that the second DU schedules uplink transmission.

In one possible design, the determining, by the second network node, a first concentration unit CU or a first concentration unit control plane CU-CP to which the first DU is connected according to the first distribution unit identity includes: and the second network node determines the identification or address of the first CU or the first CU-CP connected with the first DU according to the first distribution unit group identification.

In one possible design, the second network node is a second CU or a second CU-CP connected to the second DU.

In a thirteenth aspect, the present application provides a remote interference management apparatus, which may be a network device, or a chip or a chipset in the network device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the apparatus may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored in the storage unit to enable the network device to perform corresponding functions in any one of the ninth aspect and the ninth aspect, or the processing unit executes the instructions stored in the storage unit to enable the network device to perform corresponding functions in any one of the tenth aspect and the tenth aspect, or the processing unit executes the instructions stored in the storage unit to enable the network device to perform corresponding functions in any one of the eleventh aspect and the eleventh aspect, or the processing unit executes the instructions stored in the storage unit to enable the network device to perform corresponding functions in any one of the twelfth aspect and the twelfth aspect. When the apparatus is a chip or a chipset within a network device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes the instructions stored in the storage unit to make the network device execute the corresponding functions in any possible implementation manner of the ninth aspect or the ninth aspect, or the processing unit executes the instructions stored in the storage unit to make the network device execute the corresponding functions in any possible implementation manner of the tenth aspect or the tenth aspect, or the processing unit executes the instructions stored in the storage unit to make the network device execute the corresponding functions in any possible implementation manner of the eleventh aspect or the eleventh aspect, or the processing unit executes the instructions stored in the storage unit to make the network device execute the corresponding functions in any possible implementation manner of the twelfth aspect or the twelfth aspect, where the storage unit may be a storage unit in the chip or the chip set (for example, registers, cache memory, etc.) or may be a memory location (e.g., read-only memory, random access memory, etc.) within the terminal device that is external to the chip or chipset.

In a fourteenth aspect, a remote interference management apparatus is provided, including: a processor, a communication interface, and a memory. The communication interface is used for transmitting information, and/or messages, and/or data between the device and other devices. The memory is configured to store computer executable instructions, and when the apparatus runs, the processor executes the computer executable instructions stored in the memory, so as to cause the apparatus to perform the remote interference management method according to any one of the ninth aspect or the ninth aspect, or the remote interference management method according to any one of the tenth aspect or the tenth aspect, or the remote interference management method according to any one of the eleventh aspect or the eleventh aspect, or the remote interference management method according to any one of the twelfth aspect or the twelfth aspect.

In a fifteenth aspect, the present application also provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of any one of the above-described possible implementations of the ninth aspect or the ninth aspect, or the method of any one of the above-described possible implementations of the tenth aspect or the tenth aspect, or the method of any one of the above-described possible implementations of the eleventh aspect or the eleventh aspect, or the method of any one of the above-described possible implementations of the twelfth aspect or the twelfth aspect.

In a sixteenth aspect, the present application further provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of the possible implementations of the ninth aspect or the ninth aspect described above, or the method of any one of the possible implementations of the tenth aspect or the tenth aspect described above, or the method of any one of the possible implementations of the eleventh aspect or the eleventh aspect described above, or the method of any one of the possible implementations of the twelfth aspect or the twelfth aspect described above.

Drawings

Fig. 1 is a schematic diagram of a RIM process provided in an embodiment of the present application;

fig. 2 is a schematic view of a remote interference scenario provided in an embodiment of the present application;

fig. 3A is a schematic structural diagram of a radio access network device divided into CUs and DUs according to an embodiment of the present application;

FIG. 3B is a schematic structural diagram of a radio access network device divided into CU-CP, CU-UP and DU according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a remote interference management method according to an embodiment of the present application;

fig. 5 is a schematic diagram of adjusting downlink symbols according to an embodiment of the present disclosure;

fig. 6 is a flowchart of another remote interference management method according to an embodiment of the present application;

fig. 7 is a flowchart of a method for grouping DUs according to an embodiment of the present application;

fig. 8 is a flowchart of another method for grouping DUs according to an embodiment of the present application;

fig. 9 is a flowchart of another method for grouping DUs according to an embodiment of the present application;

fig. 10 is a flowchart of a method for forming a DU packet according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a remote interference management apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another remote interference management apparatus according to an embodiment of the present application;

fig. 13 is a flowchart of another remote interference management method according to an embodiment of the present application;

fig. 14 is a flowchart of another remote interference management method according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Remote Interference Management (RIM) is a proposed technical solution for solving remote interference. Currently, the remote interference management process is shown in fig. 1, and specifically includes the following steps. Step 1, a downlink signal sent by a wireless access network device in an interference source (accumulator) area causes remote interference to the reception of an uplink signal of the wireless access network device in an interfered (victim) area. And step 2, the wireless access network equipment in the interfered area transmits a Reference Signal (RS) through an air interface, wherein the RS is used for indicating that the wireless access network equipment is subjected to remote interference. And 3, monitoring the received RS by the wireless access network equipment in the interference source area, sending a notice of receiving the RS to the wireless access network equipment in the interfered area through a wired link, wherein the wired link can be a transmission link through an Xn interface or a transmission link through a core network, and executing a scheme (remote interference transmission schemes) for eliminating remote interference. And 4, the wireless access network equipment in the interference source region monitors that the RS is not received, stops executing the scheme for eliminating the remote interference, stops RS monitoring and sends a notice for stopping sending the RS to the wireless access network equipment in the interfered region. And step 5, the wireless access network equipment in the interfered area receives the notice of stopping transmitting the RS, and stops transmitting the RS.

At present, the scheme for eliminating remote interference may be implemented in the radio access network device in the interference source area, the radio access network device in the interfered area, or both the radio access network device in the interference source area and the radio access network device in the interfered area.

When the radio access network device in the interfered area implements the remote interference cancellation scheme, the remote interference cancellation scheme may be implemented on a frequency domain. Specifically, the radio access network device needs to measure the interfered status of the entire available frequency band, and then select an undisturbed available frequency point to schedule uplink transmission. When the radio access network device in the interfered area implements the remote interference cancellation scheme, the remote interference cancellation scheme may be implemented in the time domain. Specifically, the radio access network device needs to continuously monitor whether there is interference, and then schedule uplink transmission on the non-interfered symbols. Therefore, the implementation of the remote interference elimination scheme by the radio access network equipment in the interfered area requires monitoring the interference condition and scheduling uplink transmission, which increases the resource consumption, wastes the base station resource and loses the cell performance.

When the radio access network device in the interference source area implements a scheme for eliminating remote interference, the radio access network device can know how many uplink symbols cause remote interference to the radio access network device in the interfered area by analyzing the RS signal, and then avoid sending data in downlink symbols occupying the same resources as the uplink symbols or reconfiguring a slot (slot) format. The radio access network equipment can also analyze the RS signal information, know the uplink frequency point and the bandwidth information of the radio access network equipment in the interfered area, and then stop sending downlink signals in corresponding frequency resources. According to the scheme, the radio access network equipment in the interfered area needs to carry corresponding information such as symbol information subjected to remote interference and frequency domain information of uplink transmission resources when sending the RS signal, but time-frequency resources for sending the RS signal are less, so that the RS signal can carry less information and cannot carry complete information. In addition, corresponding information such as symbol information subjected to remote interference and frequency domain information of uplink transmission resources is sent through the air interface, and time-frequency resources of the air interface are occupied, so that cell performance is affected.

In order to avoid remote interference, static configuration may be adopted, for example, configuring longer uplink and downlink time intervals of the interference source region and the interfered region, or configuring different frequencies for downlink of the interference source region and uplink of the interfered region. However, longer uplink and downlink time intervals increase resource overhead (overhead) and thus lose cell performance. While the fixed different uplink and downlink frequencies reduce the spectrum efficiency and thus also lose cell performance.

Based on this, embodiments of the present application provide a remote interference management method and apparatus, so as to solve the problem that a remote interference management scheme in the prior art may lose cell performance. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

The embodiment of the present application may be applied to, but not limited to, a Next Radio (NR) system, a time division duplex long term evolution (TDD-LTE) system, and other communication systems, and may also be extended to a cellular system related to wireless fidelity (WiFi), worldwide interoperability for microwave access (wimax), a future wireless communication system, and a third generation partnership project (3 GPP). For example, a communication system architecture of the embodiment of the present application may be as shown in fig. 2, and includes an interference source region and an interfered region, where the interference source region includes at least one radio access network device, and the interfered region includes at least one radio access network device, where the radio access network device in the interference source region may generate remote interference to the radio access network device in the interfered region. It should be understood that fig. 2 is only an exemplary illustration and is not intended to specifically limit the number of radio access network devices included in the interference source region and the interfered region. The communication system shown in fig. 2 may further include other devices, such as a core network device, a terminal, a relay device, and a backhaul device, which is not limited to this embodiment of the present application.

It should be understood that the radio access network device in the embodiment of the present application is used for accessing the terminal to the wireless network. A radio access network device may be referred to as a base station and may also be referred to as a Radio Access Network (RAN) node (or device). For example, the radio access network device may be a next-generation Node B (Gnb), a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP).

For example, the structure of the radio access network device in the embodiment of the present application may be as shown in fig. 3A. Specifically, the radio access network device may be divided into a Centralized Unit (CU) and at least one Distributed Unit (DU). The CU may be configured to manage or control at least one DU, and may also be referred to as a CU connected to at least one DU. This structure can separate the protocol layers of the radio access network equipment in the communication system, wherein part of the protocol layers are centrally controlled by the CU, and the rest or all of the functions of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU. Taking radio access network equipment as an example of a gNB, a protocol layer of the gNB includes a Radio Resource Control (RRC) layer, a Service Data Adaptation Protocol (SDAP) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a media access control sublayer (MAC) layer, and a physical layer. For example, the CU may be configured to implement the functions of the RRC layer, the SDAP layer, and the PDCP layer, and the DU may be configured to implement the functions of the RLC layer, the MAC layer, and the physical layer. The embodiment of the present application does not specifically limit the protocol stacks included in the CU and the DU.

For example, a CU in the embodiment of the present application may be further divided into a control plane (CU-CP) network element and a plurality of user plane (CU-user plane, CU-UP) network elements. Wherein, the CU-CP can be used for control plane management, and the CU-UP can be used for user plane data transmission. The interface between the CU-CP and the CU-UP can be the E1 port. The interface between the CU-CP and the DU may be F1-C for transport of control plane signaling. The interface between CU-UP and DU may be F1-U for user plane data transmission. And the CU-UP can be connected through an Xn-U port to carry out user plane data transmission. For example, taking the gbb as an example, the structure of the gbb may be as shown in fig. 3B.

It should be understood that "at least one" in the embodiments of the present application means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b and c can be single or multiple.

The following describes a remote interference management method provided in the present application with reference to the accompanying drawings.

Referring to fig. 4, a flowchart of a remote interference management method provided in the present application is shown. The method comprises the following steps:

s401, the first network device receives the RS sent by the second network device. RS is used to indicate that the second network device is subject to remote interference. The first network device may be any radio access network device in the interference source area, and the second network device may be any radio access network device in the interfered area.

In an exemplary illustration, the RS may carry an identifier of the second network device, and the first network device may search an address of the second network device according to a pre-stored correspondence between the identifier and the address, or obtain a correspondence between the identifier and the address from another network device, so that the first network device may know the address of the second network device.

In another exemplary illustration, the RS may also carry an address of the second network device, so that the first network device may know the address of the second network device.

Of course, the RS may also carry other information, which is not listed here.

In a specific implementation, the second network device may send the RS to the first network device through an air interface, which may specifically refer to step 2 in the RIM flow shown in fig. 1.

In particular implementations, the first network device and/or the second network device may have different architecture with separated functionality. For example, both the first network device and the second network device may be a gNB or an eNB; alternatively, the first network device may be a DU, and the second network device may be a gNB or an eNB; or, the first network device may be a gNB or an eNB, and the second network device may be a DU; also alternatively, both the first network device and the second network device may be DUs.

S402, the first network equipment determines first auxiliary information, wherein the first auxiliary information comprises at least one of the following information: the frequency domain information of the downlink transmission resource of the first network equipment, the time domain information of the downlink transmission resource of the first network equipment, and the beam information of the downlink transmission of the first network equipment.

The frequency domain information may indicate frequency domain resources occupied by downlink transmission of the first network device, for example, the frequency domain information may indicate a frequency range occupied by downlink transmission of the first network device, and the like. The time domain information may indicate a time domain resource occupied by downlink transmission of the first network device, for example, the time domain information may indicate slot format (slot format) configuration of the uplink transmission and the downlink transmission of the first network device, so that the sending time and the number of symbols for the uplink transmission scheduled by the first network device, and the sending time and the number of symbols for the downlink transmission of the first network device may be determined according to the slot format configuration. The beam information may indicate a beam configuration adopted for downlink transmission by the first network device, for example, the beam information may indicate a direction of a beam when the first network device transmits downlink, and the like.

S403, the first network device sends the first auxiliary information to the second network device.

The first network device sends the first auxiliary information to the second network device according to the address of the second network device acquired in step S401.

In a specific implementation, the architecture after the first network device implements the function separation may be as shown in fig. 3A, when the first network device sends the first assistance information to the second network device, the first network device (i.e., the first DU) may send the first assistance information to the second network device, specifically, the first network device (i.e., the first DU) may send the first assistance information to the second network device through a CU (referred to as a first CU) connected to the first network device, that is, the first network device (i.e., the first DU) sends the first assistance information to the first CU, and then the first CU sends the first assistance information to the second network device. The architecture of the second network device after implementing the function separation may also be as shown in fig. 3A, and correspondingly, the second network device (i.e., the second DU) may receive the first auxiliary information, specifically, the second network device (i.e., the second DU) may receive the first auxiliary information through its connected CU (referred to as the second CU), that is, the second CU receives the first auxiliary information from the first network device, and then the second CU sends the first auxiliary information to the second network device (i.e., the second DU).

The architecture after the first network device implements the function separation may also be, as shown in fig. 3B, when the first network device sends the first auxiliary information to the second network device, the first network device (i.e., the first DU) sends the first auxiliary information to the second network device, specifically, the first network device (i.e., the first DU) may send the first auxiliary information to the second network device through a CU-CP (referred to as a first CU-CP) connected to the first network device, that is, the first network device (i.e., the first DU) sends the first auxiliary information to the first CU-CP, and then the first CU-CP sends the first auxiliary information to the second network device. The architecture of the second network device after implementing the function separation may also be as shown in fig. 3B, and correspondingly, the second network device (i.e. the second DU) may receive the first auxiliary information, specifically, the second network device (i.e. the second DU) may receive the first auxiliary information through its connected CU-CP (referred to as the second CU-CP), that is, the second CU-CP receives the first auxiliary information from the first network device, and then the second CU-CP sends the first auxiliary information to the second network device (i.e. the second DU).

It should be understood that the architecture of the first network device and the second network device after implementing the function separation may be different. For example, if the architecture of the first network device after implementing the function separation is shown in fig. 3A, and the architecture of the second network device after implementing the function separation is shown in fig. 3B, the first DU may specifically send the first auxiliary information to the second CU-CP through the first CU, and then the second CU-CP sends the first auxiliary information to the second DU; or, if the architecture of the first network device with separated functions is shown in fig. 3B and the architecture of the second network device with separated functions is shown in fig. 3A, the first DU may specifically send the first auxiliary information to the second CU through the first CU-CP, and the second CU sends the first auxiliary information to the second DU. Or, one of the first network device and the second network device implements a structure with separated functions, for example, the first network device is a first DU, and the second network device is a gNB or eNB, or the first network device is a gNB or eNB, and the second network device is a second DU.

In the embodiment of the present application, a network device (i.e., a first network device) in an interference source region sends first auxiliary information to a network device (i.e., a second network device) in an interfered region, so that the network device in the interfered region can perform remote interference cancellation according to transmission resources indicated by the first auxiliary information, for example, select a suitable frequency point, a suitable symbol, a suitable beam direction, and the like to schedule uplink transmission. For example, the first auxiliary information includes a frequency range of downlink transmission resources of the first network device, so that the second network device may select frequency resources outside the frequency range corresponding to the downlink transmission resources of the first network device when scheduling uplink transmission. In the embodiment of the application, the network device in the interfered area does not need to continuously monitor interference, and remote interference can be directly eliminated, so that resource consumption for monitoring by the network device in the interfered area can be avoided, and the cell performance of the interfered area can be ensured. In addition, compared with the adoption of static configuration, such as the configuration of longer uplink and downlink time intervals of an interference source region and an interfered region, or the configuration of a mode that different frequencies are respectively adopted for downlink of the interference source region and uplink of the interfered region, the embodiment of the application can effectively reduce the loss of the cell performance.

For example, the frequency domain information of the downlink transmission resource of the first network device includes at least one Synchronization Signal Block (SSB) frequency point. Or, the frequency domain information of the downlink transmission resource of the first network device may also include at least one SSB frequency point and at least one downlink transmission bandwidth (transmission bandwidth) configuration.

The at least one downlink SSB frequency point may include a current downlink SSB frequency point of the first network device, and the at least one downlink bandwidth configuration includes a current downlink transmission bandwidth configuration of the first network device. In addition, the at least one downlink SSB frequency point may further include a downlink SSB frequency point that may be configured by the first network device in the future. The at least one bandwidth configuration may also include a downstream transmission bandwidth configuration that the first network device may configure in the future. Therefore, the second network device can determine the frequency range of the first network device generating remote interference according to the downlink SSB frequency point and the downlink transmission bandwidth configuration of the first network device, and then the second network device can avoid the frequency range to schedule uplink transmission so as to reduce the influence of the remote interference on the uplink transmission.

The time domain information of the downlink transmission resource of the first network device may include at least one slot format (slot format) configuration. Wherein the at least one time slot format configuration may include a time slot format configuration of a current downlink transmission resource of the first network device. In addition, the at least one slot format configuration may further include a slot format configuration that may be configured in the future by the first network device. Therefore, after receiving the first auxiliary information, the second network device may determine the symbol occupied by the downlink transmission of the first network device according to the timeslot format configuration of the first network device, and further, the second network device may determine the symbol occupied by the downlink transmission of the second network device for scheduling the uplink transmission according to the symbol occupied by the downlink transmission of the first network device, for example, the second network device determines the symbols 1 to 5 occupied by the downlink transmission of the first network device according to the timeslot format configuration of the first network device, and if there is no transmission delay, the second network device may select to start scheduling the uplink transmission at the symbol 6. For another example, the second network device determines, according to the timeslot format configuration of the first network device, that the first network device occupies symbols 1 to 5 in downlink transmission, and assuming that the transmission delay is 1 symbol, the second network device may determine, according to the symbols (i.e., symbols 1 to 5) occupied in downlink transmission of the first network device and the transmission delay, that the symbols subjected to remote interference are symbols 2 to 6, and then the second network device may select to start scheduling uplink transmission at symbol 7, so as to reduce the influence of the remote interference on uplink transmission.

The beam (beam) information transmitted downstream by the first network device comprises at least one downstream beam configuration. Wherein the at least one downlink beam configuration may include a current downlink beam configuration of the first network device. In addition, the at least one downlink beam configuration may further include a downlink beam configuration that may be configured by the first network device in the future. Therefore, the second network device can determine the uplink beam at the second network device after receiving the first auxiliary information, and if the second network device determines that the second network device is subjected to remote interference, the second network device can determine the direction of the remote interference, and after receiving the first auxiliary information, the second network device can determine the signal direction range from the first network device by combining the direction of the remote interference and the downlink beam configuration of the first network device, so as to determine the uplink beam at the second network device, thereby avoiding the process that the second network device needs to monitor in each direction and then determine the uplink beam, and further saving the resource overhead of the second network device.

In a specific embodiment, the first network device may determine, but is not limited to, information such as a downlink SSB frequency point that may be configured in the future by the first network device, a downlink transmission bandwidth configuration that may be configured in the future by the first network device, a slot format configuration that may be configured in the future, and a downlink beam configuration that may be configured in the future according to information such as a service of the first network device, a transmission scheduling condition, or a transmission scheduling condition of an adjacent network device.

In a specific implementation, the first network device sends the first auxiliary information to the second network device, which may be implemented in any one of, but is not limited to, the following three ways:

in a first manner, a first network device sends a first message to a second network device after receiving an RS sent by the second network device, where the first message is used to notify the second network device that the first network device receives the RS, and the first message carries the first auxiliary information. For example, the first message may be the message sent in step 3 of the RIM procedure shown in fig. 1, and the sending process of the first message may refer to step 3 of the RIM procedure shown in fig. 1. The first network device sends the first auxiliary information to the second network device through the first message, and the second network device can schedule uplink transmission according to the first auxiliary information.

In a second mode, the first network device periodically sends the first auxiliary information to the second network device. Specifically, the first network device may periodically send the first auxiliary information to the second network device through a wired link after receiving the RS sent by the second network device, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network. For example, the sending, by the first network device, the first auxiliary information through the wired link may specifically include: and determining the address of the second network equipment according to the identifier or the address of the second network equipment carried in the RS, and sending the first auxiliary information to the second network equipment through an Xn interface or a core network according to the address of the second network equipment. The first network device periodically sends the current first auxiliary information to the second network device, so that the real-time performance of the first auxiliary information can be improved, the second network device can perform remote interference management based on the first auxiliary information with high real-time performance, and the accuracy of the remote interference management can be improved.

In a third manner, the first network device may further send the first auxiliary information to the second network device when the downlink configuration information of the first network device is updated, where the downlink configuration information includes at least one of the following information: downlink SSB frequency point configuration, downlink transmission bandwidth configuration, time slot format configuration and downlink wave beam configuration. Specifically, when the downlink configuration information is updated, the first network device may send the first auxiliary information to the second network device through a wired link, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network. The first network equipment sends the first auxiliary information to the second network equipment when the downlink configuration information is updated, so that the second network equipment can acquire the first auxiliary information in time, and the accuracy of remote interference management can be improved. In addition, the first network device sends the first auxiliary information when the downlink configuration information is updated, so that the signaling overhead can be reduced, and the network resources can be saved.

Therefore, after receiving the first auxiliary information sent by the first network device, the second network device may instruct the terminal device served by the second network device to reduce the power for performing uplink transmission on the transmission resource corresponding to the first auxiliary information, or the second network device may also avoid scheduling uplink transmission on the transmission resource corresponding to the first auxiliary information.

Specifically, if the first auxiliary information includes frequency domain information of the downlink transmission resource of the first network device, the second network device may instruct the terminal device served by the second network device to increase the power for performing uplink transmission in the frequency domain range corresponding to the frequency domain information. Or, the second network device may also instruct the terminal device served by the second network device to avoid performing uplink transmission in the frequency domain range corresponding to the frequency domain information. The second network device can effectively reduce the remote interference suffered by the second network device by indicating the terminal device served by the second network device to improve the power of uplink transmission in the interfered frequency domain range, or indicating the terminal device served by the second network device to avoid the mode of uplink transmission in the interfered frequency domain range.

If the first auxiliary information includes time domain information of the downlink transmission resource of the first network device, the second network device may instruct the terminal device served by the second network device to increase the power for performing uplink transmission on the first symbol. Alternatively, the second network device may also instruct its serving terminal device to avoid uplink transmission on the first symbol. The first symbol may be at least one symbol determined according to a symbol corresponding to the time domain information. For example, the second network device may determine the first symbol according to the symbol corresponding to the time domain information and the transmission delay, for example, the second network device determines that the first network device occupies symbols 1 to 5 in downlink transmission according to the slot format configuration of the first network device, and if the transmission delay is 1 symbol, the second network device may determine that the symbols occupied in downlink transmission by the first network device (i.e., symbols 1 to 5) and the transmission delay determine that the symbols subjected to remote interference are symbols 2 to 6, and then the second network device may determine that the first symbol is symbols 2 to 6. The second network device can effectively reduce the remote interference suffered by the second network device by indicating the terminal device served by the second network device to increase the power of the first symbol for uplink transmission or indicating the terminal device served by the second network device to avoid the mode of uplink transmission on the first symbol.

As an exemplary illustration, the symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols.

If the first auxiliary information includes beam information transmitted by the first network device in the downlink, the second network device may determine the uplink beam according to the beam information, for example, the second network device may determine a direction subjected to remote interference when determining that the second network device is subjected to remote interference, and after receiving the first auxiliary information, the second network device may determine a signal direction range from the first network device by combining the direction subjected to remote interference and the downlink beam information of the first network device, so as to determine the uplink beam at the second network device, thereby avoiding a process that the second network device needs to monitor in each direction before determining the uplink beam, and further saving resource overhead of the second network device.

In addition, in a possible implementation, the first network device may further receive second assistance information sent by the second network device, where the second assistance information includes at least one of the following information: the method includes the steps of obtaining frequency domain information of uplink transmission of second network equipment, obtaining frequency domain information of uplink transmission resources of the second network equipment subjected to interference in a frequency domain, obtaining the number of interfered symbols of the uplink transmission resources of the second network equipment in a time domain, obtaining a slot (slot) of the uplink transmission resources of the second network equipment subjected to interference in the time domain and/or the interfered symbols in the slot, obtaining a slot format configuration of the second network equipment, and obtaining beam information of uplink transmission scheduled by the second network equipment. The frequency domain information may indicate a frequency domain resource occupied by the second network device for scheduling uplink transmission, for example, the frequency domain information may indicate a frequency range occupied by the second network device for scheduling uplink transmission, and the like. The time domain information may indicate a time slot format configuration of uplink and downlink transmission of the second network device, so that at least one symbol that the second network device schedules uplink transmission and at least one symbol that the second network device schedules downlink transmission, and so on may be determined according to the time slot format configuration. The beam information may indicate a beam configuration used by the second network device to schedule the uplink transmission, such as the beam information may indicate a direction of a beam when the second network device schedules the uplink transmission, and so on.

It should be understood that the first network device and/or the second network device may have different architecture with separated functions. For example, the first network device may receive second assistance information sent by the second network device; alternatively, the first network device may receive second auxiliary information sent by the second network device through the second CU or the second CU-CP; or the first network device may receive, through the first CU or the first CU-CP, the second auxiliary information sent by the second network device; alternatively, the first network device may receive, via the first CU or the first CU-CP, the second auxiliary information sent by the second network device via the second CU or the second CU-CP.

In one exemplary illustration, the first network device can coordinate with the second assistance information based on the first assistance information to further reduce performance loss in remote interference management. For example, the first network device may further perform remote interference cancellation according to the second assistance information after receiving the second assistance information. For example, a frequency point, a symbol, a beam direction, and the like that cause little remote interference to the second network device are selected for downlink transmission, or the power of downlink transmission that causes remote interference to the second network device is reduced. Optionally, after performing remote interference cancellation, the first network device sends the first auxiliary information of the first network device to the second network device again, so that the second network device determines to schedule time-frequency resources for uplink transmission or further perform remote interference cancellation, and the like.

In a specific embodiment, if the second auxiliary information includes frequency domain information corresponding to an uplink transmission resource of the second network device, the frequency domain range of the first transmission resource may be a frequency domain range indicated by the second auxiliary information. Therefore, the first network device may stop downlink transmission in the frequency domain indicated by the second assistance information, or may reduce the power of downlink transmission in the frequency domain indicated by the second assistance information. The first network device can effectively reduce the remote interference suffered by the second network device by reducing the power of downlink transmission in the frequency domain range generating the remote interference or avoiding the mode of downlink transmission in the frequency domain range generating the remote interference. The first network device may reduce remote interference to the second network device by avoiding the frequency domain resource for which the second network device schedules uplink transmission.

In a specific embodiment, if the second auxiliary information includes frequency domain information that the uplink transmission resource of the second network device is interfered in a frequency domain, the frequency domain range of the first transmission resource may be the frequency domain range indicated by the second auxiliary information. Therefore, the first network device may stop downlink transmission in the frequency domain indicated by the second assistance information, or may reduce the power of downlink transmission in the frequency domain indicated by the second assistance information. The first network device can effectively reduce the remote interference suffered by the second network device by reducing the power of downlink transmission in the frequency domain range generating the remote interference or avoiding the mode of downlink transmission in the frequency domain range generating the remote interference. The first network device may reduce remote interference to the second network device by avoiding the frequency domain resource for which the second network device schedules uplink transmission.

If the second auxiliary information includes the number of interfered symbols in the time domain of the uplink transmission resource of the second network device, or the slot format configuration of the second network device, or the time slot (slot) in the time domain of the uplink transmission resource of the second network device and/or the interfered symbols in the time slot, the symbols in the time domain of the first transmission resource may be symbols determined according to the symbols indicated by the second auxiliary information. Therefore, the first network device may adjust the downlink transmission symbol according to the number of the interfered symbols in the time domain of the uplink transmission resource of the second network device, or the slot format configuration of the second network device, or the time slot (slot) in the time domain of the uplink transmission resource of the second network device and/or the interfered symbols in the time slot. For example, taking 4 symbols occupied by downlink transmission of the first network device and 2 symbols occupied by the second auxiliary information including the uplink transmission resource of the second network device interfered in the time domain as an example, the first network device may shift the symbols occupied by the downlink transmission forward by two symbols, as shown in fig. 5.

The first network device adjusts the symbols for downlink transmission according to the number of the interfered symbols in the time domain of the uplink transmission resource of the second network device, or the slot format configuration of the second network device, or the time slot (slot) in the time domain of the uplink transmission resource of the second network device and/or the interfered symbols in the time slot, so that the remote interference to the second network device can be reduced.

If the second auxiliary information includes beam information for scheduling uplink transmission by the second network device, the beam corresponding to the first transmission resource may be a beam determined according to the second auxiliary information. For example, the beam corresponding to the first transmission resource may be based on the location information of the second network device in combination with the uplink beam information of the second network device. Therefore, the first network device may stop performing downlink transmission on the beam corresponding to the first transmission resource, or may also reduce power of performing downlink transmission on the beam corresponding to the first transmission resource, so that remote interference suffered by the second network device may be effectively reduced.

Referring to fig. 6, a flow chart of another remote interference management method provided by the present application is shown. The method comprises the following steps:

s601, a second network device receives a first message sent by a first network device, where the first message is used to notify the second network device that the first network device receives a reference signal RS, and the RS is used to indicate that the second network device is subjected to remote interference. The first network device may be any radio access network device in the interference source area, and the second network device may be any radio access network device in the interfered area.

Of course, the RS may also carry other information, which is not listed here. The first message may be the message sent in step 3 of the RIM procedure shown in fig. 1, and the sending process of the first message may refer to step 3 of the RIM procedure shown in fig. 1.

S602, the second network device determines second assistance information, where the second assistance information includes at least one of the following information: the method includes the steps of obtaining frequency domain information corresponding to uplink transmission resources of second network equipment, frequency domain information of uplink transmission resources of the second network equipment subjected to interference in a frequency domain, the number of interfered symbols of the uplink transmission resources of the second network equipment in a time domain, a slot (slot) of the uplink transmission resources of the second network equipment subjected to interference in the time domain and/or interfered symbols in the slot, time slot format configuration of the second network equipment, and beam information of uplink transmission scheduled by the second network equipment.

The frequency domain information may indicate a frequency domain resource occupied by the second network device for scheduling uplink transmission, for example, the frequency domain information may indicate a frequency range occupied by the second network device for scheduling uplink transmission, and the like. The time domain information may indicate a time slot format configuration of uplink and downlink transmission of the second network device, so that at least one symbol that the second network device schedules uplink transmission, at least one symbol that the second network device schedules downlink transmission, and so on may be determined according to the time slot format configuration. The beam information may indicate a beam configuration used by the second network device to schedule the uplink transmission, such as the beam information may indicate a direction of a beam when the second network device schedules the uplink transmission, and so on.

As an exemplary illustration, the symbol according to the embodiment of the present application may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

The frequency domain information corresponding to the uplink transmission resource of the second network device may include an SSB frequency point for scheduling uplink transmission; or, the frequency domain information corresponding to the uplink transmission resource of the second network device may also include an SSB frequency point and a transmission bandwidth configuration for scheduling uplink transmission.

S603, the second network device sends the second auxiliary information to the first network device.

In a specific implementation, the architecture after the second network device implements the function separation may be as shown in fig. 3A, when the second network device sends the second assistance information to the first network device, the second network device (i.e., the second DU) may send the second assistance information to the first network device, specifically, the second network device (i.e., the second DU) may send the second assistance information to the first network device through a CU (referred to as a second CU) connected to the second network device, that is, the second network device (i.e., the second DU) sends the second assistance information to the second CU, and then the second CU sends the second assistance information to the first network device. The architecture of the first network device after implementing the function separation may also be as shown in fig. 3A, and correspondingly, the first network device (i.e., the first DU) may receive the second auxiliary information, specifically, the first network device (i.e., the first DU) may receive the second auxiliary information through its connected CU (referred to as the first CU), that is, the first CU receives the second auxiliary information from the second network device, and then the first CU sends the second auxiliary information to the first network device (i.e., the first DU).

The architecture of the second network device after implementing the function separation may also be, as shown in fig. 3B, when the second network device sends the second auxiliary information to the first network device, the second network device (i.e., the second DU) sends the second auxiliary information to the first network device, specifically, the second network device (i.e., the second DU) may send the second auxiliary information to the first network device through a CU-CP (referred to as a second CU-CP) connected to the second network device, that is, the second network device (i.e., the second DU) sends the second auxiliary information to the second CU-CP, and then the second CU-CP sends the second auxiliary information to the first network device. The architecture of the first network device after implementing the function separation may also be as shown in fig. 3B, and correspondingly, the first network device (i.e. the first DU) may receive the second auxiliary information, specifically, the first network device (i.e. the first DU) may receive the second auxiliary information through its connected CU-CP (referred to as the first CU-CP), that is, the first CU-CP receives the second auxiliary information from the second network device, and then the first CU-CP sends the second auxiliary information to the first network device (i.e. the first DU).

It should be understood that the architecture of the first network device and the second network device after implementing the function separation may be different. For example, if the architecture of the second network device after implementing the function separation is shown in fig. 3A, and the architecture of the first network device after implementing the function separation is shown in fig. 3B, the second DU may specifically send the first auxiliary information to the first CU-CP through the second CU, and then the first CU-CP sends the second auxiliary information to the first DU; or, the architecture of the second network device after the function separation is implemented is shown in fig. 3B, and the architecture of the first network device after the function separation is implemented is shown in fig. 3A, specifically, the second DU may send the first auxiliary information to the first CU through the second CU-CP, and then the first CU sends the second auxiliary information to the first DU. Or, one of the first network device and the second network device implements a structure with separated functions, for example, the first network device is a first DU, and the second network device is a gNB or eNB, or the first network device is a gNB or eNB, and the second network device is a second DU.

In the embodiment of the present application, the network device in the interfered area (i.e., the second network device) sends the assistance information to the network device in the interference source area (i.e., the first network device), so that the network device in the interfered area can perform remote interference cancellation according to the transmission resource indicated by the assistance information. For example, the network device in the interference source region may determine, according to the auxiliary information, a frequency point, a symbol, a beam direction, and the like that generate remote interference, and stop or reduce downlink transmission in the frequency point, the symbol, and the beam direction that generate remote interference, for example, the second auxiliary information includes an SSB frequency point and a transmission bandwidth configuration at which the second network device schedules uplink transmission, so that the first network device may know, after receiving the second auxiliary information, a frequency range occupied by the uplink transmission resource scheduled by the second network device, and thus the first network device may stop performing downlink transmission in the corresponding frequency range, so as to reduce remote interference to the uplink transmission. In the embodiment of the present application, the network device in the interference area may directly implement remote interference cancellation. In addition, compared with the method in which the network device in the interfered area carries corresponding information in the RS signal, in the embodiment of the present application, the second network device may send the auxiliary information through a wired link, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network, so that the integrity of the auxiliary information may be ensured. In addition, compared with the adoption of static configuration, such as the configuration of longer uplink and downlink time intervals of an interference source region and an interfered region, or the configuration of a mode that different frequencies are respectively adopted for downlink of the interference source region and uplink of the interfered region, the embodiment of the application can effectively reduce the loss of the cell performance.

In a specific implementation, the second network device sends the second auxiliary information to the first network device, which may be implemented in any one of, but is not limited to, the following three ways:

in a first manner, the second network device may periodically send the second assistance information to the first network device. Specifically, the second network device may send the second auxiliary information to the first network device through a wired link after receiving the first message, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network. That is, the first message may carry an identifier or an address of the first network device, and the second network device may determine the address of the first network device according to the first message, and periodically send the current second auxiliary information to the first network device through an Xn interface or a core network according to the address of the first network device. The second network device periodically sends the second auxiliary information to the first network device, so that the real-time performance of the second auxiliary information can be improved, the first network device can perform remote interference management based on the second auxiliary information with higher real-time performance, and the accuracy of the remote interference management can be improved.

In a second manner, the second network device sends the second auxiliary information to the first network device when the uplink configuration information of the second network device is updated, where the uplink configuration information includes at least one of the following information: the method comprises the steps of uplink SSB frequency point configuration, uplink transmission bandwidth configuration, time slot format configuration and uplink beam configuration. Specifically, when the uplink configuration information is updated, the second network device may send the second auxiliary information to the first network device through a wired link, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network, that is, the first message may carry an identifier or an address of the first network device, and the second network device may determine the address of the first network device according to the first message and send the second auxiliary information to the first network device through the Xn interface or the core network according to the address of the first network device. The second network device sends the second auxiliary information to the first network device when the uplink configuration information is updated, so that the first network device can obtain the second auxiliary information in time, and the accuracy of remote interference management can be improved. In addition, the second network device sends the second auxiliary information when the uplink configuration information is updated, so that the signaling overhead can be reduced, and the network resources can be saved.

In a third mode, the second network device sends the second auxiliary information to the first network device after receiving the first message. Specifically, after receiving the first message, the second network device may send the second auxiliary information to the first network device through a wired link, where the wired link may be a transmission link through an Xn interface or a transmission link through a core network, that is, the first message may carry an identifier or an address of the first network device, and the second network device may determine the address of the first network device according to the first message and send the second auxiliary information to the first network device through the Xn interface or the core network according to the address of the first network device. And the second network equipment sends the second auxiliary information to the first network equipment through the wired link after receiving the first message, and compared with a mode that the second network equipment carries the second auxiliary information in the RS, the integrity of the second auxiliary information can be ensured.

In addition, the second network device may further receive first assistance information sent by the first network device, where the first assistance information includes at least one of the following information: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information corresponding to the downlink transmission resource of the first network device. The frequency domain information may indicate frequency domain resources occupied by downlink transmission of the first network device, for example, the frequency domain information may indicate a frequency range occupied by downlink transmission of the first network device, and the like. The time domain information may indicate a time domain resource occupied by downlink transmission of the first network device, for example, the time domain information may indicate slot format (slot format) configuration of the uplink transmission and the downlink transmission of the first network device, so that at least one symbol of uplink transmission scheduled by the first network device, at least one symbol of downlink transmission of the first network device, and the like may be determined according to the slot format configuration. The beam information may indicate a beam configuration adopted for downlink transmission by the first network device, for example, the beam information may indicate a direction of a beam when the first network device transmits downlink, and the like.

In one exemplary illustration, the second network device can coordinate with the second assistance information based on the first assistance information to further reduce performance loss in remote interference management. For example, the second network device may further perform remote interference cancellation according to the first assistance information after receiving the first assistance information. For example, the second network device avoids scheduling uplink transmission in the interfered frequency point, symbol, and beam direction, or the second network device may instruct the terminal device served by the second network device to increase the power of uplink transmission in the interfered frequency point, symbol, and beam direction. Optionally, after performing remote interference cancellation, the second network device sends the second auxiliary information of the second network device to the first network device again, so that the first network device determines time-frequency resources for downlink transmission and the like.

For example, the frequency domain information of the downlink transmission resource of the first network device may include at least one downlink SSB frequency point. Or, the frequency domain information of the downlink transmission resource of the first network device may also include at least one downlink SSB frequency point and at least one downlink transmission bandwidth configuration, where the at least one downlink SSB frequency point includes a current downlink SSB frequency point of the first network device, and the at least one downlink transmission bandwidth configuration includes the current downlink transmission bandwidth configuration of the first network device. In the embodiment of the present application, the downlink SSB frequency point may be understood as a frequency point occupied by the downlink SSB. Therefore, the second network device can determine the frequency range of the first network device generating remote interference according to the downlink SSB frequency point and the downlink transmission bandwidth configuration of the first network device, and then the second network device can avoid the frequency range to schedule uplink transmission so as to reduce the influence of the remote interference on the uplink transmission.

The time domain information corresponding to the downlink transmission resource of the first network device may include at least one slot format (slot format) configuration, where the at least one slot format configuration includes a current slot format configuration of the first network device. In addition, the at least one slot format may further include a slot format configuration that may be configured by the first network device in the future. Therefore, after receiving the first auxiliary information, the second network device may determine the symbol occupied by the downlink transmission of the first network device according to the timeslot format configuration of the first network device, and further, the second network device may determine the symbol occupied by the downlink transmission of the second network device for scheduling the uplink transmission according to the symbol occupied by the downlink transmission of the first network device, for example, the second network device determines the symbols 1 to 5 occupied by the downlink transmission of the first network device according to the timeslot format configuration of the first network device, and if there is no transmission delay, the second network device may select to start scheduling the uplink transmission at the symbol 6. For another example, the second network device determines, according to the timeslot format configuration of the first network device, that the first network device occupies symbols 1 to 5 in downlink transmission, and assuming that the transmission delay is 1 symbol, the second network device may determine, according to the symbols (i.e., symbols 1 to 5) occupied in downlink transmission of the first network device and the transmission delay, that the symbols subjected to remote interference are symbols 2 to 6, and then the second network device may select to start scheduling uplink transmission at symbol 7, so as to reduce the influence of the remote interference on uplink transmission.

The downlink beam information of the first network device may include at least one downlink beam configuration, where the at least one downlink beam configuration includes a current downlink beam configuration of the first network device. In addition, the at least one downlink beam configuration may further include a downlink beam configuration that may be configured by the first network device in the future.

Thus, the second network device may schedule uplink transmission on a first transmission resource, where the first transmission resource is a transmission resource other than a second transmission resource, and the second transmission resource is a transmission resource corresponding to the first auxiliary information. Alternatively, the second network device may also instruct the terminal device served by the second network device to increase the power for performing uplink transmission on the second transmission resource.

Specifically, if the first auxiliary information includes frequency domain information of downlink transmission resources of the first network device, the frequency point of the first transmission resource may be any frequency point except the frequency domain range indicated by the first auxiliary information. Thus, the second network device may instruct its serving terminal device to increase the power for uplink transmission in the frequency domain indicated by the first assistance information. Alternatively, the second network device may also avoid scheduling the uplink transmission in the frequency domain indicated by the first assistance information. The second network device can effectively reduce the remote interference suffered by the second network device by indicating the terminal device served by the second network device to improve the power of uplink transmission in the interfered frequency domain range or indicating the terminal device served by the second network device to avoid the mode of uplink transmission in the interfered frequency domain range.

If the first auxiliary information includes time domain information of the downlink transmission resource of the first network device, the second network device may instruct the terminal device served by the second network device to increase the power for performing uplink transmission on the first symbol. Alternatively, the second network device may also instruct its serving terminal device to avoid uplink transmission on the first symbol. The first symbol may be at least one symbol determined according to a symbol corresponding to the time domain information. For example, the second network device may determine the first symbol according to the symbol corresponding to the time domain information and the transmission delay, for example, the second network device determines that the first network device occupies symbols 1 to 5 in downlink transmission according to the slot format configuration of the first network device, and if the transmission delay is 1 symbol, the second network device may determine that the symbols occupied in downlink transmission by the first network device (i.e., symbols 1 to 5) and the transmission delay determine that the symbols subjected to remote interference are symbols 2 to 6, and then the second network device may determine that the first symbol is symbols 2 to 6. The second network device can effectively reduce the remote interference suffered by the second network device by indicating the terminal device served by the second network device to improve the power of uplink transmission on the first symbol or indicating the terminal device served by the second network device to avoid the mode of uplink transmission on the first symbol.

If the first auxiliary information includes beam information corresponding to a downlink transmission resource of the first network device, the beam corresponding to the first transmission resource may be a beam determined according to the first auxiliary information. For example, the beam corresponding to the first transmission resource may be determined according to the direction in which the second network device is interfered and downlink beam information of the first network device, where the direction in which the second network device is interfered may be determined by the second network device when determining that the second network device is remotely interfered. Thus, the second network device may instruct its serving terminal device to increase the power for uplink transmission on the beam indicated by the first assistance information. Or, the second network device may also avoid scheduling uplink transmission on the beam indicated by the first auxiliary information, so that remote interference suffered by the second network device may be effectively reduced.

In addition, if the radio access network device in the embodiment of the present application adopts the architecture shown in fig. 3A, when information interaction is performed between the radio access network device in the interference source region and the radio access network device in the interfered region, the information interaction needs to be completed through the CU, for example, the first network device sends information to the second network device or receives information sent by the second network device through the CU connected to the first network device, and the second network device sends information to the first network device or receives information sent by the first network device based on the CU connected to the second network device. In the remote interference management, an operation, maintenance and management (OAM) device may group DUs having similar remote interference characteristics in an interfered area, where the similar remote interference characteristics may refer to that remote interference is generated by the same interference source area, and each group is assigned with an identifier (set ID). When the radio access network device in the interference source region and the radio access network device in the interfered region perform information interaction through the CU, the CU needs to know the packet information of the DU connected to the CU.

Based on this, the embodiments of the present application provide a remote interference management method, so as to solve the problem how to let a CU know the packet condition of a DU after an OAM packetizes the DU, so that information interaction can be performed between a radio access network device in an interference source region and a radio access network device in an interfered region through the CU.

The first embodiment is as follows:

a remote interference management method may be as shown in fig. 7, the method comprising:

s701, an OAM divides at least one DU into at least one distribution unit group according to an interference strength indication reported by the at least one DU.

In a specific implementation, the OAM may group the DUs with similar remote interference characteristics according to the interference strength indication reported by the DU.

S702, the OAM sends, to each DU in the at least one DU, a distribution unit group identifier corresponding to the DU.

When determining the distribution unit group identifier corresponding to the distribution unit group, the OAM may determine, by combining with the address or identifier of the CU connected to the DU included in the distribution unit group, in other words, the distribution unit group identifier may be associated with the address or identifier of the CU connected to the DU included in the distribution unit group, so that other devices may determine the address or identifier of the CU according to the distribution unit group identifier of the distribution unit group, and may route the information sent to the DU in the distribution unit group to the CU, and the CU may then send the information to the DU according to the grouping information.

Alternatively, when determining the distribution unit group identifier corresponding to the distribution unit group, the OAM may also be determined by combining an identifier or an address of an access and mobility management function (AMF) connected to a CU corresponding to the distribution unit group, where the CU corresponding to the distribution unit group is a CU connected to a DU included in the distribution unit group. In other words, the distribution unit group identification may be associated with an identification or address of the AMF to which the distribution unit group corresponding CU is connected. Thus, other devices may determine the address or identity of the AMF from the distribution unit group identity and may route information sent to the DU in the distribution unit group to the AMF, the AMF may determine the address or identity of the CU from packet information or the like obtained from OAM and send the information to the CU, and the CU may send the information to the DU from the packet information.

In addition, when determining the distribution unit group identifier corresponding to the distribution unit group, the OAM may also combine with other information, which is not listed here.

S703, each DU sends the corresponding distribution unit group id to the CU connected to the DU.

For better understanding of the method described in the first embodiment, the following description is given by taking an example in which the interfered area includes two CUs, i.e., CU1 and CU2, CU1 is connected to 5 DUs, respectively DU1 to DU5, and CU2 is connected to 3 DUs, respectively DU6 to DU8, and it should be understood that this is merely an exemplary description and does not specifically limit the number of CUs, the number of DUs, the grouping manner, and the like.

The specific process may be as shown in fig. 8.

S801, the OAM receives the interference strength indications sent by DU1 to DU 8.

At S802, OAM groups DU1 DU8 according to the interference strength indication sent by DU1 DU 8.

The grouping results are as follows: dividing DU1 and DU3 into a group, wherein the distribution unit group is set 1; dividing DU2 and DU5 into a group, wherein the distribution unit group is set 2; dividing DU4 and DU6 into a group, and setting the distribution unit group as set 3; DU7 and DU8 are grouped together, and the set 4 is set for illustration.

For example, the distribution unit group identity of a distribution unit group may be associated with the identity or address of the CU to which the DU is connected in the distribution unit group. For example, taking set 1 as an example, the identity of set 1 may be associated with the identity or address of CU 1. For another example, taking set 3 as an example, the identifier of set 3 may be associated with the identifier or address of CU1, or the identifier of set 3 may be associated with the identifier or address of CU 2.

S803, OAM transmits the corresponding distribution unit group id to DU1 to DU8, respectively.

Taking the grouping result as an example, OAM may send to DU1 the identity of set 1, which is the distribution unit group corresponding to DU1, send to DU2 the identity of set 2, which is the distribution unit group corresponding to DU2, send to DU3 the identity of set 1, which is the distribution unit group corresponding to DU3, send to DU4 the identity of set 3, which is the distribution unit group corresponding to DU4, send to DU5 the identity of set 2, which is the distribution unit group corresponding to DU5, send to DU6 the identity of set 3, which is the distribution unit group corresponding to DU6, send to DU7 the identity of set 4, which is the distribution unit group corresponding to DU7, and send to DU8 the identity of set 4, which is the distribution unit group corresponding to DU 8.

S804, DU1 to DU8 respectively send their own distribution unit group id to the respectively connected CUs.

Taking the grouping result as an example, DU1 sends the identifier of set 1 to CU1, DU2 sends the identifier of set 2 to CU1, DU3 sends the identifier of set 1 to CU1, DU4 sends the identifier of set 3 to CU1, and DU5 sends the identifier of set 2 to CU 1. Therefore, CU1 can determine the grouping condition of DU 1-DU 5. DU6 sends the set 3 id to CU2, DU7 sends the set 4 id to CU2, and DU8 sends the set 4 id to CU 2. Therefore, CU2 can determine the grouping condition of DU 6-DU 8.

Based on the methods shown in fig. 7 and fig. 8, the CU in the interfered area may determine the packet condition of the connected DUs, so that the radio access network devices in the interfered area may perform information interaction with the radio access network device in the interference source area through the CU. For example, for a interfered source of Set 1, DU1 and DU2 respectively transmit respective RSs, where the respective RSs both carry the identifier of Set 1, so that the first network device may determine the address of CU1 according to the identifier of Set 1 carried by the RS after receiving the RS. The first network device determines the first assistance information and sends the first assistance information to the CU 1. Alternatively, CU1 sends the second side information of DU1 and DU2 to the first network device.

Example two:

a remote interference management method may be as shown in fig. 9, the method comprising:

s901, an OAM divides at least one DU into at least one distribution unit group according to an interference strength indication reported by the at least one DU.

S902, the OAM sends packet information to CUs connected to each DU in the at least one DU, respectively. The grouping information includes an identification of a distribution unit group and an identification of a DU connected to the CU in the distribution unit group.

Alternatively, when determining the distribution unit group identifier corresponding to the distribution unit group, the OAM may also be determined by combining an identifier or an address of an access and mobility management function (AMF) connected to the CU corresponding to the distribution unit group, where the CU corresponding to the distribution unit group is a CU connected to the DU included in the distribution unit group. In other words, the distribution unit group identification may be associated with an identification or address of the AMF to which the distribution unit group corresponding CU is connected. Thus, other devices may determine the address or identity of the AMF from the distribution unit group identity and may route information sent to the DU in the distribution unit group to the AMF, the AMF may determine the address or identity of the CU from packet information or the like obtained from OAM and send the information to the CU, and the CU may send the information to the DU from the packet information.

In a specific implementation, the OAM may further send the grouping information to the at least one DU, or the OAM may further send corresponding distribution unit group identifiers to the at least one DU, respectively.

For better understanding of the method described in the second embodiment, the following description will take an example in which the interfered area includes two CUs, CU1 and CU2, where CU1 is connected to DU1 to DU5, and CU2 is connected to DU6 to DU 8. It should be understood that this is only an exemplary illustration, and the number of CUs, the number of DUs, the grouping manner, and the like are not specifically limited.

The specific process may be as shown in fig. 10.

S1001, the OAM receives the interference strength indications sent by DU1 to DU 8.

S1002, OAM groups DU1 DU8 according to the interference strength indication sent by DU1 DU 8.

The grouping results are as follows: dividing DU1 and DU3 into a group, wherein the distribution unit group is set 1; dividing DU2 and DU5 into a group, wherein the distribution unit group is set 2; dividing DU4 and DU6 into a group, and setting the distribution unit group as set 3; the example in which DU7 to DU8 are grouped into one group and the distribution unit group is set 4 will be described.

S1003, OAM transmits packet information to CU1 and CU2, respectively.

In addition, the OAM may also transmit packet information to DUs 1 to DU8, respectively, or the OAM may also transmit corresponding distribution unit group identifications to DUs 1 to DU8, respectively.

Wherein the OAM may transmit corresponding packet information to CU1 and CU2, respectively. Illustratively, taking the above grouping result as an example, the OAM may send the grouping information shown in table 1 to the CU1 and the grouping information shown in table 2 to the CU 2.

TABLE 1

TABLE 2

Alternatively, the OAM may send all the packet information to the CU1 and the CU2, as shown in table 3, the CU1 and the CU2 may obtain their own corresponding packet information from the received packet information, and after the CU1 receives the packet information shown in table 3, the packet information of the DUs 1 to DU5 connected to the CU1 may be determined as follows: DU1 and DU3 belong to set 1, DU2 and DU5 belong to set 2, and DU4 belongs to set 3. After receiving the grouping information shown in table 3, CU2 may determine that the grouping information of DUs 6-8 connected to CU2 is: DU6 belongs to set 3 and DU7 and DU8 belong to set 4.

TABLE 3

The packet information may be transmitted in a list form or in other forms, and the embodiment of the present application is only described by taking a list as an example, and the transmission form of the packet information is not particularly limited.

Based on the methods shown in fig. 7 to fig. 10, for the architecture of the second network device shown in fig. 3A, the CU in the interfered area may determine the grouping situation of the connected DUs, so that information interaction may be performed with the radio access network device in the interference source area. For example, for an interfered source device of set 1, DU1 and DU3 respectively transmit respective RS1 and RS3, where RS1 and RS3 have the same sequence, or RS1 and RS3 carry the same content, or RS1 and RS3 have the same configuration, etc., and both RS1 and RS3 carry an identity of set 1. After receiving the RS1 and the RS3, the first network device determines the address of the CU1 according to the set 1 identifier, determines the first auxiliary information, and sends the first auxiliary information to the CU1, and the CU1 may send the first auxiliary information to DUs connected thereto, respectively, after receiving the first auxiliary information. Similarly, for the architecture of the second network device as shown in fig. 3B, the CU-CP in the interfered area may determine the packet condition of the connected DUs, so that information interaction with the radio access network device in the interference source area may be performed. For example, for an interfered source device of set 1, DU1 and DU3 respectively transmit respective RS1 and RS3, where RS1 and RS3 have the same sequence, or RS1 and RS3 carry the same content, or RS1 and RS3 have the same configuration, etc., and both RS1 and RS3 carry an identity of set 1. After receiving the RS1 and the RS3, the first network device determines the address of the CU-CP1 according to the set 1 identifier, determines the first auxiliary information, and sends the first auxiliary information to the CU-CP1, and the CU-CP1 can send the first auxiliary information to DUs connected to the CU-CP1 respectively after receiving the first auxiliary information. Alternatively, the CU1 or the CU-CP1 transmits the second auxiliary information of the DU1 and the second auxiliary information of the DU3 to the first network device, or generates new second auxiliary information according to the second auxiliary information of the DU1 and the second auxiliary information of the DU3 to the first network device. The new second auxiliary information may be one of the second auxiliary information obtained by performing a mathematical operation on the second auxiliary information of DU1 and the second auxiliary information of DU 3.

Similarly, for a set 3 interfered source device, DU4 and DU6 respectively transmit respective RS4 and RS6, where RS4 and RS6 have the same sequence, or RS4 and RS6 carry the same content, or RS4 and RS6 have the same configuration, etc., and both RS4 and RS6 carry a set 3 identity, where the set 3 identity may be associated with an identity or address of CU1, or the set 3 identity may be associated with an identity or address of CU 2. The following takes as an example that the identity of set 3 is associated with the identity of CU 1. After receiving the RS4 and the RS6, the first network device may determine the identifier of the CU1 or the CU-CP1 according to the identifier of set 3, determine the first auxiliary information, and send the first auxiliary information to the CU1 or the CU-CP1, respectively, so that the CU1 or the CU-CP1 forwards the first auxiliary information to the CU2 or the CU-CP 2. The CU1 or the CU-CP1 may transmit the first auxiliary information to the DU connected thereto, respectively, upon receiving the first auxiliary information, and the CU2 or the CU-CP2 may transmit the first auxiliary information to the DU connected thereto, respectively, upon receiving the first auxiliary information. Alternatively, the CU1 and the CU2, or the CU-CP1 and the CU-CP2 respectively transmit the second auxiliary information of the DU4 and the second auxiliary information of the DU6 to the first network device. It should be noted that, for the architecture of the first network device shown in fig. 3A or 3B, after receiving the RS1 and the RS3, any DU in the interference source area reports corresponding information to the CU or CU-CP connected to the DU, and the CU or CU-CP performs information interaction with the second network device.

Based on the same inventive concept as the method embodiment, the embodiment of the application provides a remote interference management device. The remote interference management apparatus may include a receiving unit 1101, a processing unit 1102, and a transmitting unit 1103, as shown in fig. 11.

In a specific implementation manner, the remote interference management apparatus may be specifically configured to implement the method performed by the first network device in the embodiment shown in fig. 4, and the apparatus may be the first network device itself, or may be a chip or a chip set in the first network device, or a part of a chip in the chip for performing a function of the related method. The receiving unit 1101 is configured to receive an RS sent by a second network device, where the RS is used to indicate that the second network device is subjected to remote interference. A processing unit 1102 configured to determine first assistance information, the first assistance information including at least one of: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information of the downlink transmission of the first network device. A sending unit 1103, configured to send the first auxiliary information determined by the processing unit 1102 to the second network device.

For example, the frequency domain information of the downlink transmission resource of the first network device may include at least one downlink synchronization signal block SSB frequency point. Or, the frequency domain information of the downlink transmission resource of the first network device may also include at least one downlink SSB frequency point and at least one downlink transmission bandwidth configuration.

For example, the time domain information of the downlink transmission resource of the first network device may include at least one slot format configuration.

For example, the beam information transmitted by the first network device in downlink may include at least one downlink beam configuration.

In one implementation, the sending unit 1103 may be specifically configured to: and sending a first message to the second network device, where the first message is used to notify the second network device that the first network device receives the RS, and the first message carries the first auxiliary information.

In another implementation manner, the sending unit 1103 may specifically be configured to: periodically transmitting the first assistance information to the second network device.

In another implementation manner, the sending unit 1103 may specifically be configured to: sending the first auxiliary information to the second network device when the downlink configuration information of the first network device is updated, where the downlink configuration information includes at least one of the following information: downlink SSB frequency point configuration, downlink transmission bandwidth configuration, time slot format configuration and downlink wave beam configuration.

The receiving unit 1101 may be further configured to receive second assistance information sent by the second network device, where the second assistance information includes at least one of the following information: frequency domain information corresponding to the uplink transmission resource of the second network device, frequency domain information of the uplink transmission resource of the second network device subjected to interference in a frequency domain, the number of interfered symbols in a time domain of the uplink transmission resource of the second network device, time slot format configuration of the second network device, and beam information of uplink transmission scheduled by the second network device.

The processing unit 1102 may be further configured to stop performing downlink transmission on a first transmission resource or reduce power of performing downlink transmission on the first transmission resource, where the first transmission resource is a transmission resource corresponding to the second auxiliary information.

For example, if the second auxiliary information includes frequency domain information corresponding to the uplink transmission resource of the second network device or frequency domain information that the uplink transmission resource of the second network device is interfered in a frequency domain, the frequency domain range of the first transmission resource may be a frequency domain range indicated by the second auxiliary information.

If the second auxiliary information includes the number of symbols of the uplink transmission resource of the second network device that are interfered in the time domain or the timeslot format configuration of the second network device, the symbol of the first transmission resource in the time domain may be a symbol determined according to the symbol indicated by the second auxiliary information.

If the second auxiliary information includes beam information for scheduling uplink transmission by the second network device, the beam corresponding to the first transmission resource may be a beam determined according to the second auxiliary information.

In one exemplary illustration, the first network device may be a first DU. The second network device may be a second DU.

In another specific implementation, the remote interference management apparatus may be specifically configured to implement the method performed by the second network device in the embodiment shown in fig. 6, and the apparatus may be the second network device itself, or may be a chip or a chipset in the second network device or a part of a chip for performing a function of the related method. The receiving unit 1101 is configured to receive a first message sent by a first network device, where the first message is used to notify the second network device that the first network device receives an RS, and the RS is used to indicate that the second network device is subjected to remote interference. A processing unit 1202 configured to determine second assistance information, where the second assistance information includes at least one of: frequency domain information corresponding to the uplink transmission resource of the second network device, frequency domain information of the uplink transmission resource of the second network device subjected to interference in a frequency domain, the number of interfered symbols in a time domain of the uplink transmission resource of the second network device, time slot format configuration of the second network device, and beam information of uplink transmission scheduled by the second network device. A sending unit 1103, configured to send second auxiliary information to the first network device.

For example, the frequency domain information corresponding to the uplink transmission resource of the second network device may include a synchronization signal block SSB frequency point for scheduling uplink transmission; or the frequency domain information corresponding to the uplink transmission resource of the second network device includes an SSB frequency point for scheduling uplink transmission and a transmission bandwidth configuration.

In one implementation, the sending unit 1103 may be specifically configured to: periodically transmitting the second assistance information to the first network device.

In another implementation manner, the sending unit 1103 may specifically be configured to: the second network device sends the second auxiliary information to the first network device when the uplink configuration information of the second network device is updated, where the uplink configuration information includes at least one of the following information: the method comprises the steps of uplink SSB frequency point configuration, uplink transmission bandwidth configuration, time slot format configuration and uplink beam configuration.

In a specific implementation, the receiving unit 1101 may further be configured to: receiving first auxiliary information sent by the first network device, where the first auxiliary information includes at least one of the following information: the frequency domain information of the downlink transmission resource of the first network device, the time domain information of the downlink transmission resource of the first network device, and the beam information of the downlink transmission of the first network device.

For example, the frequency domain information of the downlink transmission resource of the first network device may include at least one downlink SSB frequency point. Or, the frequency domain information of the downlink transmission resource of the first network device may also include at least one downlink SSB frequency point and at least one downlink transmission bandwidth configuration.

For example, the time domain information corresponding to the downlink transmission resource of the first network device may include at least one slot format configuration.

For example, the downlink beam information of the first network device may include one or more downlink beam configurations.

The processing unit 1102 may further be configured to: and scheduling uplink transmission on a first transmission resource, wherein the first transmission resource is a transmission resource except a second transmission resource, and the second transmission resource is a transmission resource corresponding to the first auxiliary information.

For example, if the first auxiliary information includes frequency domain information of downlink transmission resources of the first network device, the frequency point of the first transmission resource may be any frequency point except the frequency domain range indicated by the first auxiliary information.

If the first auxiliary information includes time domain information of downlink transmission resources of the first network device, a symbol of the first transmission resources in the time domain may be a symbol determined according to a symbol indicated by the first auxiliary information.

If the first auxiliary information includes beam information corresponding to a downlink transmission resource of the first network device, the beam corresponding to the first transmission resource may be a beam determined according to the first auxiliary information.

In an exemplary illustration, the first network device is a first DU. The second network device is a second DU.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It is understood that the functions or implementations of the respective modules in the embodiments of the present application may further refer to the related description of the method embodiments.

In one possible approach, the remote interference management apparatus may be as shown in fig. 12, and the apparatus may be a network device or a chip in the network device. The apparatus may include a processor 1201, a communication interface 1202, and a memory 1203. The processing unit 1102 may be the processor 1201. The receiving unit 1101 and the transmitting unit 1103 may be a communication interface 1202.

The processor 1201 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The communication interface 1202 may be a transceiver, an interface circuit such as a transceiver circuit, etc., a transceiver chip, etc. The device also includes: a memory 1203 for storing programs executed by the processor 1202. The memory 1203 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), such as a random-access memory (RAM). The memory 1203 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

The processor 1201 is configured to execute the program code stored in the memory 1203, and is specifically configured to execute the actions of the processing unit 1102, which is not described herein again.

The communication interface 1202 is specifically configured to execute the operations of the receiving unit 1101 and the sending unit 1103, and is not described herein again.

In the embodiment of the present application, the specific connection medium among the communication interface 1201, the processor 1202, and the memory 1203 is not limited. In the embodiment of the present application, the memory 1203, the processor 1202, and the communication interface 1201 are connected by a bus 1204 in fig. 12, the bus is represented by a thick line in fig. 12, and the connection manner between other components is merely illustrative and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

For the plurality of DUs in the interference source region, the plurality of DUs may also be grouped by the OAM, for example, the OAM divides the plurality of DUs in the interference source region into different distribution unit groups according to the RS signal strength received by each DU in the interference source or according to a preset rule. A distribution unit group is indicated by a distribution unit group identity associated with the identity or address of one or more CUs to which the respective DUs within the interference source region distribution unit group are connected. The distribution unit group identity is also referred to as an interferer distribution unit group identity. Similar to the method described in the embodiment of fig. 7 or fig. 8, any CU in the interference source area may obtain the identity of the aggressor distribution unit group that connects to each DU.

Referring to fig. 13, a flow chart of another remote interference management method provided by the present application is shown. Wherein, the first DU is any one first network device in the interference source region; the second DU is any one of the second network devices in the interfered area. The first DU is connected to the first CU or the first CU-CP. The second DU is connected to the second CU or the second CU-CP. The method 1300 is applied to information interaction between a first network device and a second network device. The method comprises the following steps:

s1301, the first DU receives the RS sent by the second DU.

Wherein, the RS includes the distribution unit group id of the second DU, also referred to as the second distribution unit group id.

The distribution unit group identity of a distribution unit group may be associated with the identity or address of the CU to which the DU is connected in the distribution unit group. Taking the embodiments of fig. 7-10 as an example, the identity of distribution unit set 1 may be associated with the identity or address of CU 1. The identity of distribution unit group set 3 may be associated with the identity or address of CU1 and the identity or address of CU 2.

S1302, the first DU sends a first message to the first network node, where the first message includes the second distribution unit identifier.

The first message may be a notification message that the first DU receives an RS sent by the second DU, or a notification message that the first DU monitors that the RS disappears, or the first auxiliary information in the foregoing embodiment.

Optionally, the first message contains an interferer distribution unit group identification, also referred to as a first distribution unit group identification, of the first DU.

The first network node is the first CU or the first CU-CP to which the first DU is connected.

S1303, the first network node determines, according to the second distribution unit identifier, a second network node to which the second DU is connected, and determines a second message.

Wherein the second network node is a second CU or a second CU-CP to which the second DU is connected. Specifically, the first network node determines a second network node corresponding to the second distribution unit group identifier according to a relationship between the distribution unit group identifier and an identifier or address of a CU or a CU-CP connected to the distribution unit.

The first network node determines a second message from the first message, which may be the same as or different from the first message.

S1304, the first network node determines a second message and sends the second message to the second network node.

Optionally, the second message contains a second distribution unit identity.

Optionally, the second message contains the first distribution unit identity.

In the embodiment of the application, the DU in the interference source area carries the second distribution unit group identifier in the first message, so that the signaling overhead between the DU and the CU or CU-CP connected with the DU is reduced. And the CU or CU-CP connected with the DU in the interference source area determines the identification or address of the CU or CU-CP connected with the DU in the interfered area from the second distribution unit group identification, so that the data can be accurately transmitted to the network equipment in the interfered area.

Referring to fig. 14, a flow chart of another remote interference management method provided by the present application is shown. Wherein, the first DU is any one first network device in the interference source region; the second DU is any one of the second network devices in the interfered area. The first DU is connected to the first CU or the first CU-CP. The second DU is connected to the second CU or the second CU-CP. The method 1400 is applied to information interaction between a first network device and a second network device. The method comprises the following steps:

s1401, the second DU receives a second message sent by the first network node through the second network node.

Wherein the second message contains the first distribution unit group identification.

The first network node is the first CU or the first CU-CP to which the first DU is connected. The first DU is a first network device that causes remote interference to the first DU, that is, the first DU receives a reference signal RS sent by the second DU. The distribution unit group identity of the first DU is a first distribution unit group identity.

The second message may be a notification message that the first DU receives the RS sent by the second DU, or a notification message that the first DU monitors that the RS disappears, or the first auxiliary information in the foregoing embodiment.

The second network node is a second CU or a second CU-CP to which the second DU is connected.

S1402, the second DU sends a third message to the second network node, where the third message includes the first distribution unit identifier.

Wherein the third message may be the second auxiliary information in the foregoing embodiments.

S1403, the second network node determines, according to the first distribution unit identifier, the first network node to which the first DU is connected, and determines the fourth message.

Wherein the second network node is a second CU or a second CU-CP to which the second DU is connected. Specifically, the second network node determines the first network node corresponding to the first distribution unit group identifier according to the relationship between the distribution unit group identifier and the identifier or address of the CU or CU-CP to which the distribution unit is connected.

The second network node determines a fourth message from the third message, which may be the same as or different from the third message.

S1404, the second network node sends a fourth message to the first network node.

Optionally, the fourth message contains the first distribution unit group identification.

In the embodiment of the present application, the DU in the interfered area carries the first distribution unit identifier in the third message, thereby reducing the signaling overhead between the DU and the CU or CU-CP connected to the DU. And the CU or CU-CP connected with the DU in the interfered area determines the identification or address of the CU or CU-CP connected with the DU in the interference source area from the first distribution unit group identification, so that the data can be accurately transmitted to the network equipment of the interference source area.

The embodiments described in fig. 13 and 14 are further exemplarily described below. For the architecture of the second network device as shown in fig. 3A, the CU in the interfered area may determine the packet condition of the connected DUs, so that information interaction with the radio access network device in the interference source area may be performed. For example, for an interfered source device of set 1, DU1 and DU3 respectively transmit respective RS1 and RS3, where RS1 and RS3 have the same sequence, or RS1 and RS3 carry the same content, or RS1 and RS3 have the same configuration, etc., and both RS1 and RS3 carry an identity of set 1. After receiving the RS1 and the RS3, the first network device determines the identifier or the address of the CU1 according to the identifier of set 1, determines the first auxiliary information, and sends the first auxiliary information to the CU1, and the CU1 may send the first auxiliary information to DUs connected thereto, respectively, after receiving the first auxiliary information. Similarly, for the architecture of the second network device as shown in fig. 3B, the CU-CP in the interfered area may determine the packet condition of the connected DUs, so that information interaction with the radio access network device in the interference source area may be performed. For example, for an interfered source device of set 1, DU1 and DU3 respectively transmit respective RS1 and RS3, where RS1 and RS3 have the same sequence, or RS1 and RS3 carry the same content, or RS1 and RS3 have the same configuration, etc., and both RS1 and RS3 carry an identity of set 1. After receiving the RS1 and the RS3, the first network device determines the identifier or the address of the CU-CP1 according to the identifier of set 1, determines the first auxiliary information, and sends the first auxiliary information to the CU-CP1, and the CU-CP1 may send the first auxiliary information to DUs connected thereto, respectively, after receiving the first auxiliary information. Optionally, the first network device sends a first message to the CU1 or the CU-CP1, and carries the set 1 identifier in the first message, and the CU1 or the CU-CP1 may send the received first message sent by the first network device to the DU corresponding to the set 1 according to the set 1 identifier. Illustratively, the first network device receives RS1 and RS3 transmitted by DU1 and DU3 or monitors that RS1 and RS3 disappear, and transmits a notification message of receiving the RS or monitoring that the RS disappears to CU1 or CU-CP1, both of which may be the first message. The first message may also be used to carry the first assistance information. The first message may also carry other information, which is not limited in this application. Alternatively, the CU1 or the CU-CP1 transmits the second auxiliary information of the DU1 and the second auxiliary information of the DU3 to the first network device, or generates new second auxiliary information according to the second auxiliary information of the DU1 and the second auxiliary information of the DU3 to the first network device. The new second auxiliary information may be one of the second auxiliary information obtained by performing a mathematical operation on the second auxiliary information of DU1 and the second auxiliary information of DU 3.

Similarly, for a set 3 interfered source device, DU4 and DU6 respectively transmit respective RS4 and RS6, where RS4 and RS6 have the same sequence, or RS4 and RS6 carry the same content, or RS4 and RS6 have the same configuration, etc., and both RS4 and RS6 carry a set 3 identity, where the set 3 identity may be associated with the identity or address of CU1 and the identity or address of CU 2. The following takes as an example that the identity of set 3 is associated with the identity of CU 1. After receiving the RS4 and the RS6, the first network device may determine the identifier or the address of the CU1 or the CU-CP1 according to the identifier of set 3, determine the first auxiliary information, and send the first auxiliary information to the CU1 or the CU-CP1, respectively, so that the CU1 or the CU-CP1 forwards the first auxiliary information to the CU2 or the CU-CP 2. The CU1 or the CU-CP1 may transmit the first auxiliary information to the DU connected thereto, respectively, upon receiving the first auxiliary information, and the CU2 or the CU-CP2 may transmit the first auxiliary information to the DU connected thereto, respectively, upon receiving the first auxiliary information. Alternatively, the CU1 and the CU2, or the CU-CP1 and the CU-CP2 respectively transmit the second auxiliary information of the DU4 and the second auxiliary information of the DU6 to the first network device. The following takes as an example that the identity of set 3 is associated with the identities of CU1 and CU 2. After receiving the RS4 and the RS6, the first network device may determine the identities or addresses of the CU1 (or CU-CP1) and the CU2 (or CU-CP2) according to the identity of set 3, determine the first auxiliary information, and send the first auxiliary information to the CU1 (or CU-CP1) and the CU2 (or CU-CP2), respectively. Optionally, the first network device sends a first message to the CU1 (or CU-CP1) and the CU2 (or CU-CP2), and carries the set 3 identifier in the first message, so that the CU1 (or CU-CP1) and the CU2 (or CU-CP2) may send the received first message sent by the first network device to the set 3 corresponding DU4 and DU6, respectively, according to the set 3 identifier. Illustratively, the first network device receives RS4 and RS6 transmitted by DU4 and DU6 or monitors that RS4 and RS6 disappear, and transmits a notification message of receiving the RS or monitoring that the RS disappears to CU1 (or CU-CP1) and CU2 (or CU-CP2), respectively, both of which may be the first message. The first message may also be used to carry the first assistance information. The first message may also carry other information, which is not limited in this application. Alternatively, CU1 (or CU-CP1) sends the second assistance information of DU4 to the first network device, and CU2 (or CU-CP2) sends the second assistance information of DU6 to the first network device.

It should be noted that, for the architecture of the first network device shown in fig. 3A or 3B, after receiving RS1 and RS3, or RS4 and RS6, any DU in the interference source area reports corresponding information to the CU or CU-CP connected to the DU, and the CU or CU-CP performs information interaction with the second network device.

Optionally, when the DU receives the RS sent by the second network device, a second message is sent to the CU or CU-CP connected to the DU, where the second message includes corresponding information. When a DU receives RS1 and RS3, the corresponding information is the identification of set 1, and the CU or CU-CP connected with the DU determines the identification or address of CU1 (or CU-CP1) according to the received identification of set 1; when a DU receives RS4 and RS6, the corresponding information is the identification of set 3, and the CU or CU-CP connected to the DU determines the identification or address of CU1 (or CU-CP1) and CU2 (or CU-CP2) according to the received identification of set 3. The CU or CU-CP to which the DU is connected sends the first assistance information to the CU or CU-CP to which the second network device of the disturbed area is connected. Illustratively, when the DU receives the RS sent by the second network device or monitors that the RS disappears accordingly, the DU sends a notification message of receiving the RS or a notification message of detecting that the RS disappears to the CU or the CU-CP connected to the DU, and both notification messages may serve as the second message. The second message may also be used to carry the first assistance information. The second message may also carry other information, which is not limited in this application. Therefore, as a plurality of second network devices generally exist, compared with the technical scheme that the DU in the interference source area determines the identity or address of the CU or CU-CP connected to the second network device according to the received identity or address of the distribution unit group sent by the second network device and carries the identity or address of the CU or CU-CP connected to the second network device in the second message, the DU in the interference source area in the embodiment of the present application carries the identity of the distribution unit group in the second message, so that the signaling overhead between the DU and the CU or CU-CP connected to the DU is reduced. Optionally, the CU or CU-CP connected to the DU sends a first message to the CU or CU-CP connected to the second network device in the interfered area, and carries the identifier of the corresponding distribution unit packet in the first message. Illustratively, a first message sent by any DU-connected CU or CU-CP of the interference source region to CU1 (or CU-CP1) carries an identification of set 1; alternatively, the first message sent by any DU-connected CU or CU-CP of the interference source region to CU1 (or CU-CP1) and CU2 (or CU-CP2), respectively, carries the identity of set 3. The first message may be a notification message that the DU receives the RS sent by the second network device or a notification message that the RS disappears is monitored, the first message may also be used to carry the first auxiliary information, and the first message may also carry other information, which is not limited in this application.

Optionally, a CU or CU-CP connected to any DU in the interference source area sends a first message to a CU or CU-CP connected to the second network device in the interfered area, and carries the interference source distribution unit group identity of the DU in the first message. Correspondingly, the CU or CU-CP connected with the second network equipment in the interfered area sends a fifth message to the second network equipment, and the interference source distribution unit group identification is carried in the fifth message. Optionally, after receiving the first information of the CU or CU-CP connected to the first network device, the CU or CU-CP connected to the second network device in the interfered area sends a fifth message to the second network device, and carries the interference source distribution unit group identifier. Wherein the first message carries an interference source distribution unit group identifier. Optionally, the CU or CU-CP connected to the first network device sends a notification message that the first network device receives the RS or a notification message that the RS is monitored to disappear to the CU or CU-CP connected to the second network device, and both notification messages may be used as the first message. The first message may also be used to carry the first assistance information. The first message may also carry other information, which is not limited in this application. Optionally, the CU or CU-CP connected to the second network device sends a notification message that the first network device receives the RS or a notification message that the RS is monitored to disappear to the second network device, and both of the notification messages may be used as the fifth message. The fifth message may also be used to carry the first assistance information. The fifth message may also carry other information, which is not limited in this application. As can be seen, since there may be a plurality of interference source regions, the second network device may identify the interference source region according to the received interference source distribution unit group identification. Optionally, the second network device sends a third message to the CU or CU-CP connected to the second network device, and the third message carries an identifier of the interference source distribution unit group, and the CU or CU-CP determines, according to the identifier of the interference source distribution unit group, an identifier or an address of the CU or CU-CP connected to the first network device, and sends the third message to the CU or CU-CP connected to the first network device. For example, the third message may be used to carry the second auxiliary information, and may also be used to carry other information, which is not limited in this application. Therefore, as a plurality of first network devices generally exist, compared with the technical scheme that the DU in the interfered area determines the identity or address of the CU or CU-CP connected to the first network device according to the received identity of the aggressor distribution unit group sent by the first network device, and carries the identity or address of the CU or CU-CP connected to the first network device in the third message, the DU in the interfered area in the embodiment of the present application carries the identity of the aggressor distribution unit group in the third message, so that the signaling overhead between the DU and the CU or CU-CP connected to the DU is reduced. Optionally, the CU or CU-CP connected to the second network device in the interfered area sends a fourth message to the CU or CU-CP connected to the first network device, and the fourth message carries the interference source distribution unit group identifier, so that the CU or CU-CP connected to the first network device sends the fourth message to the corresponding first network device according to the interference source distribution unit group identifier. For example, the fourth message may be used to carry the second assistance information, and may also be used to carry other information, which is not limited in this application.

Fig. 11 shows a schematic block diagram of a network device according to an embodiment of the present application, which may correspond to (e.g., may be configured as or be itself) the first distribution unit, or the first network node, or the second network node described in the above method 1300, or the second distribution unit, or the first network node, or the second network node described in the above method 1400. The network device may include: the device comprises a receiving module 1101, a processing module 1102 and a sending module 1103, wherein the processing module 1102 is respectively and communicatively coupled with the receiving module 1101 and the sending module 1103. The network device may further include a storage unit for storing a program or data to be executed by the processing module 1102, or storing information received by the receiving module 1101 and/or transmitted by the transmitting module 1103. Each module or unit in the network device is configured to execute each action or processing procedure executed by the first distribution unit, or the first network node, or the second network node described in the above method 1300, or the second distribution unit, or the first network node, or the second network node described in the above method 1400, respectively. Here, detailed description thereof is omitted in order to avoid redundancy.

Fig. 12 shows another schematic block diagram of a network device according to an embodiment of the present application, which may correspond to (e.g., may be configured as or be itself) the first distribution unit, or the first network node, or the second network node described in the above method 1300, or the second distribution unit, or the first network node, or the second network node described in the above method 1400. The network device may include: a processor 1201 and a transceiver 1202, the processor 1201 and the transceiver 1202 being communicatively coupled. The network device may also include a memory 1203, the memory 1203 communicatively coupled to the processor 1201. Optionally, the processor 1201, the memory 1203 and the transceiver 1202 may be communicatively coupled, the memory 1203 may be used to store instructions and may also be used to store information received and/or transmitted by the transceiver 1202, and the processor 1201 is used to execute the instructions stored by the memory 1203 to control the transceiver 802 to receive and/or transmit information or signals. The processor 1201, the transceiver 1202 and the memory 1203 are respectively configured to execute each action or processing procedure executed by the first distribution unit, the first network node, or the second network node described in the above method 1300, or the second distribution unit, the first network node, or the second network node described in the above method 1400. Here, detailed description thereof is omitted in order to avoid redundancy.

The embodiment of the present invention further provides a computer-readable storage medium, which is used for storing computer software instructions required to be executed for executing the processor, and which contains a program required to be executed for executing the processor.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for remote interference management, the method comprising:

a first Distribution Unit (DU) receives a Reference Signal (RS) sent by a second DU, wherein the RS is used for indicating that the second DU is subjected to remote interference, the RS comprises a second distribution unit identifier of the second DU, and the second distribution unit identifier is used for identifying a distribution unit group to which the second DU belongs;

the first DU sends a first message to a first central unit CU or a first central unit control plane CU-CP connected with the first DU, wherein the first message contains the second distribution unit group identifier, so that the first central unit CU or the first central unit control plane CU-CP connected with the first DU determines a second central unit CU or a second central unit control plane CU-CP connected with the second DU for receiving a second message according to the corresponding relation between the identifier and the address and the second distribution unit group identifier, and the second message is determined by the first central unit CU or the first central unit control plane CU-CP connected with the first DU according to the first message.

2. The method of claim 1, wherein the first message further comprises at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

3. The method of claim 2, wherein the first assistance information comprises at least one of: frequency domain information of downlink transmission resources of the first DU, time domain information of the downlink transmission resources of the first DU, and beam information of downlink transmission of the first DU.

4. A method for remote interference management, the method comprising:

a first network node receives a first message sent by a first Distribution Unit (DU), wherein the first message comprises a second distribution unit identifier, the second distribution unit identifier carries a Reference Signal (RS) sent by a second DU received by the first DU, and the second distribution unit identifier is used for identifying a distribution unit group to which the second DU belongs;

the first network node determines a second centralized unit CU or a second centralized unit control plane CU-CP connected with the second DU according to the corresponding relation between the identification and the address and the second distribution unit group identification;

the first network node determines a second message according to the first message; and

the first network node sends the second message to the second CU or the second CU-CP.

5. The method of claim 4, wherein the method comprises:

the second message includes the second distribution unit identification.

6. The method of claim 4 or 5, wherein at least one of the first message and the second message further comprises a first distribution unit identifier, and wherein the first distribution unit identifier is used to identify a distribution unit group to which the first DU belongs.

7. The method according to any of claims 4 or 5, wherein at least one of the first message and the second message further comprises at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

8. The method of claim 7, wherein the first auxiliary information comprises at least one of the following information: frequency domain information of downlink transmission resources of the first DU, time domain information of the downlink transmission resources of the first DU, and beam information of downlink transmission of the first DU.

9. The method of claim 4, wherein the determining, by the first network node, a second centralized unit CU or a second centralized unit control plane CU-CP to which the second DU is connected based on the second distribution unit group identity comprises:

and the first network node determines the identification or address of a second CU or a second CU-CP connected with the second DU according to the second distribution unit group identification.

10. The method according to any of claims 4, 5, 8 or 9, wherein the first network node is a first CU or a first CU-CP connected to the first DU.

11. A method for remote interference management, the method comprising:

a second distribution unit DU receives, through a second central unit CU or a second central unit control plane CU-CP connected to a second DU, a second message sent by a first CU or a first CU-CP connected to the first DU, where the second message includes a first distribution unit identifier of the first DU, and the first distribution unit identifier is used to identify a distribution unit group to which the first DU belongs;

and the second DU sends a third message to a second CU or a second CU-CP connected to the second DU, where the third message includes the identifier of the first distribution unit, so that the second CU or the second CU-CP connected to the second DU determines, according to the identifier-address correspondence and the identifier of the first distribution unit, the first CU or the first CU-CP connected to the first DU that receives the third message, where the third message is determined, according to the second message, by the second CU or the second CU-CP connected to the second DU.

12. The method of claim 11, wherein the third message comprises second assistance information, and wherein the second assistance information comprises at least one of: frequency domain information corresponding to the uplink transmission resource of the second DU, frequency domain information that the uplink transmission resource of the second DU is interfered in a frequency domain, the number of symbols that the uplink transmission resource of the second DU is interfered in a time domain, slot format configuration of the second DU, and beam information that the second DU schedules uplink transmission.

13. The method of claim 11, wherein the second message comprises at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

14. The method of claim 13, wherein the first auxiliary information comprises at least one of the following information: frequency domain information of downlink transmission resources of the first DU, time domain information of the downlink transmission resources of the first DU, and beam information of downlink transmission of the first DU.

15. A method for remote interference management, the method comprising:

a second network node receives a third message sent by a second distribution unit DU, where the third message includes a first distribution unit identifier, the first distribution unit identifier is carried in a second message received by the second DU from a first DU, and the first distribution unit identifier is used to identify a distribution unit group to which the first DU belongs;

the second network node determines a first centralized unit CU or a first centralized unit control plane CU-CP connected with the first DU according to the corresponding relation between the identification and the address and the first distribution unit group identification;

the second network node determines a fourth message according to the third message; and

the second network node sends the fourth message to the first CU or the first CU-CP.

16. The method of claim 15, wherein the method comprises:

the fourth message includes the first distribution unit identification.

17. The method according to claim 15 or 16, wherein at least one of the third message and the fourth message contains second assistance information.

18. The method of claim 17, wherein the second auxiliary information comprises at least one of the following information: frequency domain information corresponding to the uplink transmission resource of the second DU, frequency domain information that the uplink transmission resource of the second DU is interfered in a frequency domain, the number of symbols that the uplink transmission resource of the second DU is interfered in a time domain, slot format configuration of the second DU, and beam information that the second DU schedules uplink transmission.

19. The method of claim 15, wherein the second message comprises at least one of the following information: the first DU receives a notification message of the RS sent by the second DU, the notification message that the first DU monitors that the RS disappears, and first auxiliary information.

20. The method of claim 19, wherein the first auxiliary information comprises at least one of the following information: frequency domain information of downlink transmission resources of the first DU, time domain information of the downlink transmission resources of the first DU, and beam information of downlink transmission of the first DU.

21. The method of claim 15, wherein the determining, by the second network node, a first concentration unit CU or a first concentration unit control plane CU-CP to which the first DU is connected based on the first distribution unit identifier comprises:

and the second network node determines the identification or address of the first CU or the first CU-CP connected with the first DU according to the first distribution unit group identification.

22. The method according to any of claims 15, 16 or 18-21, wherein the second network node is a second CU or a second CU-CP connected to the second DU.

23. A communications apparatus, comprising:

a memory for storing a computer program;

a transceiver for performing the transceiving steps in the method of any of claims 1-3;

a processor for invoking and running the computer program from the memory, causing the communication device to perform the method of any of claims 1-3.

24. A communications apparatus, comprising:

a memory for storing a computer program;

a transceiver for performing the transceiving steps in the method of any of claims 4-10;

a processor for invoking and running the computer program from the memory, causing the communication device to perform the method of any of claims 4-10.

25. A communications apparatus, comprising:

a memory for storing a computer program;

a transceiver for performing the transceiving steps in the method of any of claims 11-14;

a processor for invoking and running the computer program from the memory, causing the communication device to perform the method of any of claims 11-14.

26. A communications apparatus, comprising:

a memory for storing a computer program;

a transceiver for performing the transceiving steps in the method of any of claims 15-22;

a processor for invoking and running the computer program from the memory, causing the communication device to perform the method of any of claims 15-22.

27. A computer-readable storage medium, comprising:

the computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any of claims 1-3.

28. A computer-readable storage medium, comprising:

the computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any of claims 4-10.

29. A computer-readable storage medium, comprising:

the computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any of claims 11-14.

30. A computer-readable storage medium, comprising:

the computer readable medium stores a computer program;

the computer program, when run on a computer, causes the computer to perform the method of any of claims 15-22.

31. A communication system, characterized in that the communication system comprises a first communication device and a second communication device; wherein the first communication device is configured to perform the method of any of claims 1-3; the second communication device is configured to perform the method of any of claims 4-10.

32. A communication system, characterized in that the communication system comprises a first communication device and a second communication device; wherein the first communication device is configured to perform the method of any one of claims 11-14; the second communication device is configured to perform the method of any of claims 15-22.