CN109067425B

CN109067425B - Method and device for reducing interference

Info

Publication number: CN109067425B
Application number: CN201810983352.1A
Authority: CN
Inventors: 孙红远
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-08-27
Filing date: 2018-08-27
Publication date: 2020-03-06
Anticipated expiration: 2038-08-27
Also published as: CN109067425A

Abstract

The embodiment of the invention discloses a method and a device for reducing interference, relates to the technical field of communication, and aims to solve the problem that when an LTE network and a 5G network form double connection, the receiving sensitivity of a terminal is reduced due to harmonic interference. The method comprises the following steps: the method comprises the steps that a terminal sends a first request message to first network equipment under the condition that the bandwidth of a target frequency band is larger than a preset threshold, the first request message is used for requesting the first network equipment to transmit data in the target frequency band, the target frequency band is a frequency band except a first overlapped frequency band in the first frequency band, the first overlapped frequency band is a part of the first frequency band overlapped with a second frequency band, the first frequency band is a frequency band corresponding to a first resource distributed to the terminal by the first network equipment in a first network, and the second frequency band is a frequency band corresponding to a second resource distributed to the terminal by the second network equipment in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band.

Description

Method and device for reducing interference

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for reducing interference.

Background

Currently, with the development of a fifth generation mobile communication (5G) network, under a Non-independent Networking (NSA) architecture, a dual connection mechanism between an LTE network and the 5G network is proposed, that is, a terminal is required to support a dual connection technology, a dual radio frequency is adopted to simultaneously connect the LTE network and the 5G network, and a dual link between an LTE link and the 5G link is adopted to transmit data.

However, when the 5G network and the LTE network form a dual connection, the terminal is prone to have a self-interference problem due to factors such as nonlinearity of the radio frequency device, that is, the uplink may generate harmonic interference on downlink reception, which causes sensitivity reduction of the receiving end. For example, when the n77 frequency band or the n78 frequency band of the 5G network and the B3 frequency band of the LTE network form a dual connection, the second harmonic of the transmission signal of the terminal on the B3 frequency band may fall within the n77 frequency band or the n78 frequency band of the 5G network, and thus may cause a harmonic interference problem to the 5G network, thereby causing a decrease in the reception sensitivity of the terminal.

Disclosure of Invention

The embodiment of the invention provides a method and a device for reducing interference, which are used for solving the problem that the receiving sensitivity of a terminal is reduced due to harmonic interference when the terminal forms double connection with an LTE network and a 5G network.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a method for reducing interference, where the method is applied to a terminal, and the method includes:

sending a first request message to a first network device when the bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a part where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

and receiving a response message sent by the first network equipment, wherein the response message is used for the terminal to confirm that the first network equipment transmits data in the target frequency band.

In a second aspect, an embodiment of the present invention provides a method for reducing interference, where the method is applied to a first network device, and the method includes:

receiving a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

and sending a first response message to the terminal, wherein the first response message is used for confirming that the first network equipment transmits data in the target frequency band.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes: a transmitting module and a receiving module;

the sending module is configured to send a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

the receiving module is configured to receive a response message sent by the first network device, where the response message is used by the terminal to confirm that the first network device transmits data in the target frequency band.

In a fourth aspect, an embodiment of the present invention provides a first network device, where the first network device includes: the device comprises a receiving module and a sending module;

the receiving module is configured to receive a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

the sending module is configured to send a first response message to the terminal, where the first response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

In a fifth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored on the memory and operable on the processor, where the computer program, when executed by the processor, implements the steps of the method for reducing interference as in the first aspect.

In a sixth aspect, an embodiment of the present invention provides a first network device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method for reducing interference in the second aspect are implemented.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for reducing interference as in the first aspect or the second aspect.

In this embodiment of the present invention, a terminal, when a bandwidth of a target frequency band is greater than a preset threshold, sends a first request message to a first network device, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band other than a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated by the first network device to the terminal in a first network, and the second frequency band is a resource allocated by a second network device to the terminal in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

Drawings

Fig. 1 is a schematic network architecture diagram of a dual connectivity communication system for an LTE network and a 5G network according to an embodiment of the present invention;

fig. 2 is a second schematic diagram of a network architecture of a dual-connectivity communication system for an LTE network and a 5G network according to an embodiment of the present invention;

fig. 3 is a block diagram of an architecture for implementing concurrence of an LTE link and a 5G link in a terminal according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for reducing interference according to an embodiment of the present invention;

fig. 5 is a second flowchart of a method for reducing interference according to an embodiment of the present invention;

fig. 6 is a third flowchart of a method for reducing interference according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 8 is a hardware schematic diagram of a terminal according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first network device according to an embodiment of the present invention;

fig. 10 is a hardware schematic diagram of a first network device according to an embodiment of the present invention.

Detailed Description

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, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," and "fourth," etc. in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first frequency band, the second frequency band, the third frequency band, the fourth frequency band, and so on are used to distinguish different frequency bands, not to describe a specific order of the frequency bands.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, unless otherwise specified, "a plurality" means two or more, for example, a plurality of processing units means two or more processing units; plural elements means two or more elements, and the like.

The embodiment of the present invention provides a method for reducing interference, where a terminal sends a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated by the first network device to the terminal in a first network, and the second frequency band is a resource allocated by a second network device to the terminal in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

Referring to fig. 1 (including (a) in fig. 1 and (b) in fig. 1) and fig. 2 (including (a) in fig. 2 and (b) in fig. 2), which are schematic diagrams of network architectures of a possible LTE network and 5G network dual connectivity communication system according to an embodiment of the present invention, wherein the communication system comprises at least one terminal 100, one LTE base station 200 and one 5G base station 300, and one core network device (EPC400 or NGC500) (only one each shown in fig. 1), and the terminal 100, the LTE base station 200, and the 5G base station 300, and the core network device (EPC400 or NGC500) may communicate with each other according to any connection manner as shown in fig. 1 and fig. 2 (it should be noted that, here, the communication refers to the transmission of user plane data, and the transmission of control plane data may refer to the related art, and the embodiments of the present invention are not limited), and each LTE base station 200 or 5G base station 300 may communicate with one or more terminals 100. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 and 2 are illustrated with solid lines for convenience of intuitively representing the connection relationships between the devices.

Fig. 3 is a block diagram illustrating an architecture for implementing concurrence of an LTE link and a 5G link in a terminal under an NSA architecture according to an embodiment of the present invention. The 5G link includes a power supply 120, a 5G transceiver 121, a 5G amplifier 122, a 5G band selection switch 123 and an antenna 124, and a data flow of data transmitted by the 5G link is shown in the figure, and a data flow of data received by the 5G link is opposite to a data flow of data transmitted by the 5G link, which is not shown in the figure; the LTE link includes a power supply 125, an LTE transceiver 126, an LTE amplifier 127, an LTE band selection switch 128, and an antenna 129, and a data flow of transmission data of the LTE link is shown, and a data flow of reception data of the LTE link is opposite to a data flow of transmission data, which is not shown in the figure.

The terminal in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), or the like, and the embodiment of the present invention is not limited in particular.

The execution subject of the method for reducing interference provided by the embodiment of the present invention may be the terminal, or may also be a functional module and/or a functional entity capable of implementing the method in the terminal, which may be specifically determined according to actual use requirements, and the embodiment of the present invention is not limited. The following takes a terminal as an example to exemplarily describe the method for reducing interference provided by the embodiment of the present invention.

Referring to fig. 4, an embodiment of the present invention provides a method for reducing interference, which may include steps 201 to 204 described below.

Step 201, when the bandwidth of the target frequency band is greater than the preset threshold, the terminal sends a first request message to the first network device, where the first request message is used for the terminal to request the first network device to transmit data in the target frequency band.

The frequency band, i.e. the frequency band, is the portion between two specific frequency limits, e.g. 3.3GHz-4.2 GHz.

The preset threshold is preset in advance by the terminal device, and the value of the preset threshold may be determined according to actual conditions, which is not limited in the embodiment of the present invention, for example, the preset threshold may be a feasible value such as 0Hz, 10Hz, 20Hz, and the like.

The target frequency band is a frequency band of the first frequency band except the first overlapping frequency band, that is, the first frequency band is a sum of the target frequency band and the first overlapping frequency band, and a bandwidth of the first frequency band is greater than a bandwidth of the first overlapping frequency band. The first overlapping frequency band is a portion where the first frequency band and the second frequency band overlap, i.e., the first frequency band and the second frequency band both include the first overlapping frequency band. The first frequency band is a frequency band corresponding to a first resource allocated by the first network device to the terminal in the first network, and exemplarily, a resource allocated by the first network device to the terminal in the first network is a fourth frequency band, and a relationship between the first frequency band and the fourth frequency band may be any feasible relationship, which is not limited in the embodiment of the present invention. For example, the first frequency band is the fourth frequency band or the first frequency band is a frequency band in which a second harmonic of a transmission signal of the terminal on the fourth frequency band is located. And the second frequency band second network equipment allocates a frequency band corresponding to the second resource for the terminal in the second network. The description of the second frequency band may refer to the above description related to the first frequency band, and is not repeated here.

In the case that the terminal determines that the terminal is in LTE and 5G dual connectivity, before transmitting the first request information to the first network device, the terminal determines whether an overlapping portion is included between the first frequency band and the second frequency band, that is, whether the first overlapping frequency band is included. In the case that the first frequency band and the second frequency band include a first overlapping frequency band, it is further determined whether a bandwidth of a target frequency band other than the first overlapping frequency band in the first frequency band is greater than a preset threshold, and in the case that the terminal determines that the bandwidth of the target frequency band is greater than the preset threshold, the terminal sends first request information to the first network device, where the first request information is used for the terminal to request the first network device to transmit data in the target frequency band, that is, to request communication between the first network device and the terminal on the target frequency band.

Illustratively, the preset threshold is 0Hz, the first network is a 5G network, the first network device is a 5G base station, the first frequency band is a frequency band allocated by the 5G base station to the terminal in the 5G network, the second network is an LTE network, the second network device is an LTE base station, the frequency band allocated by the LTE base station to the terminal in the LTE network is a fifth frequency band, the second frequency band is a frequency band in which a second harmonic of a transmission signal of the terminal on the fifth frequency band is located, where the bandwidth of the second frequency band is the same as that of the fifth frequency band, and the frequency of a center frequency point of the second frequency band is twice the frequency of a center frequency point of the fifth frequency band. For example, if the center frequency point of the first frequency band is fa and the bandwidth is BWa, the first frequency band is fa-BWa/2, fa + BWa/2, and the center frequency point of the fifth frequency band is fb and the bandwidth is BWb, the second frequency band is 2fb-BWb/2, 2fb + BWb/2.

For example, if the n77 frequency band in the 5G network is 3.3GHz-4.2GHz or the n78 frequency band in the 5G network is 3.3GHz-3.8GHz, and the B3 frequency band in the LTE network is 1805MHz-1880MHz, the second harmonic of the transmission signal of the terminal on the B3 frequency band is 3.61GHz-3.76 GHz. It can be seen that when the B3 band is doubly linked with the n77 band or the n78 band, the harmonic interference problem is relatively easy to occur.

When the B3 band is doubly linked with the n77 band or the n78 band, then the first band is a portion of the n77 band or the n78 band, the fifth band is a portion of the B3 band, and the first band is a portion of the 3.61GHz-3.76GHz band. Typically the bandwidth of the first frequency band is 10MHz, 15MHz, 20MHz, 40MHz, 50MHz, 60MHz, 80MHz or 100MHz, and the bandwidth of the fifth frequency band is 1.4M, 5M, 10M or 20MHz, so the bandwidth of the first frequency band will be greater than the bandwidth of the fifth frequency band in most cases.

Assuming that the first frequency band is [3.67GHz, 3.71GHz ], the second frequency band is [3.36GHz, 3.68GHz ], the terminal determines that the first overlapped frequency band is [3.67GHz, 3.68GHz ], and the target frequency band is (3.68GHz, 3.71GHz ], and sends a first request message to the first network device, where the first request message is used for the terminal to request the first network device to transmit data in the (3.68GHz, 3.71GHz ] frequency band.

Step 202, the first network device receives a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band.

The target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a part where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by the second network device in a second network.

For a detailed description, reference may be made to the description related to step 201 above, and details are not repeated here.

Step 203, the first network device sends a first response message to the terminal, where the first response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

For example, the first response message may be sent to the terminal immediately after the first network device receives the first request message. After the first network device receives the first request message, if it is determined that the first frequency band and the second frequency band both include the first overlapping frequency band and that the target frequency band is the same as the target overlapping frequency band in the first request message, the first network device may send the first response message to the terminal. The specific setting is according to the actual situation, and the embodiment of the present invention is not limited.

The first response message indicates that the first network device approves the request of the terminal, and the terminal can confirm that the first network device approves the data transmission in the target frequency band according to the first response message.

Step 204, the terminal receives a response message sent by the first network device, where the response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

For a detailed description, reference may be made to the description related to step 203, which is not repeated herein.

The above procedure is that the terminal sends the first request information to the first network device when the bandwidth of the first frequency band is greater than the bandwidth of the first overlapping frequency band. If a frequency band corresponding to a third resource allocated to the terminal by the first network device in the first network is a third frequency band, if a bandwidth of an overlapping portion (a second overlapping frequency band) of the third frequency band and the second frequency band is greater than a bandwidth of the third frequency band, the third frequency band is the first frequency band, and the second overlapping frequency band is the first overlapping frequency band; if the bandwidth of the second overlapped frequency band is equal to the bandwidth of the third frequency band, for example, as shown in fig. 5 in conjunction with fig. 4, before step 201, the method for reducing interference provided by the embodiment of the present invention may further include steps 205 to 208 described below.

Step 205, the terminal sends a second request message to the first network device, where the second request message is used for the terminal to request the first network device to allocate the first resource corresponding to the first frequency band to the terminal.

The bandwidth of the first frequency band is greater than the bandwidth of a third frequency band, where the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before the first resource is allocated; and the difference value between the bandwidth of the third frequency band and the bandwidth of the second overlapped frequency band is smaller than or equal to the preset threshold, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped.

The first network device initially allocates a third resource corresponding to a third bandwidth to the terminal device in the first network, and when the terminal determines that the overlapping portion of the third frequency band and the second frequency band is the second overlapping frequency band and the difference between the bandwidth of the third frequency band and the bandwidth of the second overlapping frequency band is less than or equal to the preset threshold (when the preset threshold is 0Hz, the bandwidth of the second overlapping frequency band is equal to the bandwidth of the third frequency band), the terminal sends a second request message to the first network device, where the second request message is used for the terminal to request the first network device to allocate the first resource corresponding to the first frequency band to the terminal. That is, the terminal requests the first network device to allocate a frequency band with a larger bandwidth to the terminal, and the terminal may request the first network device to allocate a frequency band with a larger bandwidth to the terminal multiple times to obtain a first frequency band that meets the requirement, that is, the bandwidth of the first frequency band is greater than the bandwidth of the third frequency band, and the bandwidth of the first frequency band is greater than the bandwidth of the first overlapping frequency band.

Optionally, the center frequency of the third frequency band is the same as the center frequency of the first frequency band, that is, when the first network device reallocates the frequency band for the terminal in the first network (the first frequency band), the center frequency is not changed compared to when the first network device initially allocates the frequency band for the terminal in the first network (the third frequency band). Compared with the method for changing the center frequency, the method for changing the center frequency has the advantages that the improvement on the network is small, and the influence of reduction of the peak rate of the network caused by avoiding the interference spectrum is small.

Optionally, the center frequency of the third frequency band may not be the same as the center frequency of the first frequency band.

The second overlapped frequency band may be the same as or different from the first overlapped frequency band, and the embodiment of the present invention is not limited thereto.

Illustratively, taking the above example as an example, when the preset threshold is 0Hz, the bandwidth of the second overlapped frequency band is equal to the bandwidth of the third frequency band. Assuming that the third frequency band is [3.67GHz, 3.68GHz ], the second frequency band is [3.36GHz, 3.68GHz ], the terminal determines that the second overlapped frequency band is [3.67GHz, 3.68GHz ], and at this time, the bandwidth of the third frequency band is equal to the bandwidth of the second overlapped frequency band, the terminal sends a second request message to the first network device, the second request message is used for the terminal to request the first network device to allocate the first resource corresponding to the first frequency band for the terminal. The first network device allocates the first resource corresponding to the first frequency band to the terminal, and if the first frequency band is [3.67GHz, 3.71GHz ], the center frequency of the first frequency band is different from the center frequency of the third frequency band, the first overlapped frequency band is [3.67GHz, 3.68GHz ], and the second overlapped frequency band is the same as the first overlapped frequency band; if the first frequency band is [3.66GHz, 3.69GHz ], the center frequency of the first frequency band is the same as the center frequency of the third frequency band, the first overlapped frequency band is [3.66GHz, 3.68GHz ], and the second overlapped frequency band is different from the first overlapped frequency band.

Step 206, the first network device receives a second request message sent by the terminal, where the second request message is used for the terminal to request the first network device to allocate the first resource corresponding to the first frequency band to the terminal.

The center frequency of the third frequency band is the same as the center frequency of the first frequency band.

For a detailed description, reference may be made to the description related to step 205, which is not repeated herein.

Step 207, the first network device sends a resource indication message to the terminal, where the resource indication message is used to indicate the first resource.

The first network equipment allocates a first resource for the terminal according to the received first request message, and sends a resource indication message to the terminal. With specific reference to the related art, the embodiments of the present invention are not limited.

Step 208, the terminal receives a resource indication message sent by the first network device, where the resource indication message is used to indicate the first resource.

With specific reference to the related art, the embodiments of the present invention are not limited.

Under the condition that the bandwidth of the third frequency band is determined to be the same as the bandwidth of the second overlapped frequency band, the terminal requests the first frequency band with larger bandwidth to the first network equipment, further determines the target frequency band, requests the first network equipment to transmit data in the target frequency band, and avoids the first overlapped frequency band, so that the problem of second harmonic interference cannot occur, the interference is reduced, and the receiving sensitivity of the terminal is improved.

Illustratively, in conjunction with fig. 5, as shown in fig. 6, after step 204, the method for reducing interference according to the embodiment of the present invention may further include steps 209 to 210 described below.

Step 209 is that the terminal communicates with the first network device on the target frequency band.

The specific communication process refers to the prior related art, and the embodiment of the invention is not limited.

Step 210, the first network device communicates with the terminal on the target frequency band.

The specific communication process refers to the prior related art, and the embodiment of the invention is not limited. On the target frequency band, the terminal and the first network equipment carry out data transmission, and because the first overlapped frequency band is avoided, the problem of second harmonic interference cannot occur, the interference is reduced, and the receiving sensitivity of the terminal is improved.

The embodiment of the invention provides a method for reducing interference, wherein a terminal sends a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, the first request message is used for requesting the first network device to transmit data in the target frequency band, the target frequency band is a frequency band except a first overlapping frequency band in a first frequency band, the first overlapping frequency band is a part where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated to the terminal by the first network device in a first network, and the second frequency band is a resource allocated to the terminal by the second network device in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

As shown in fig. 7, an embodiment of the present invention provides a terminal 130, where the terminal 130 includes: a transmitting module 131 and a receiving module 132;

the sending module 131 is configured to send a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band other than a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

the receiving module 132 is configured to receive a response message sent by the first network device, where the response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

Optionally, the sending module 131 is further configured to send, to the first network device, a second request message before the first request message is sent to the first network device, where the second request message is used to request the first network device to allocate, to the terminal, the first resource corresponding to the first frequency band, a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before the first resource is allocated; wherein, the difference between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is less than or equal to the preset threshold, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped; the receiving module 132 is further configured to receive a resource indication message sent by the first network device, where the resource indication message is used to indicate the first resource.

Optionally, the center frequency of the third frequency band is the same as the center frequency of the first frequency band.

The terminal provided in the embodiment of the present invention is capable of implementing each process shown in any one of fig. 4 to 6 in the foregoing method embodiments, and details are not described here again to avoid repetition.

The embodiment of the present invention provides a terminal, where the terminal sends a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated by the first network device to the terminal in a first network, and the second frequency band is a resource allocated by a second network device to the terminal in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

Fig. 8 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present invention. As shown in fig. 8, the terminal 100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the terminal configuration shown in fig. 8 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

A radio frequency unit 101, configured to send a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network; and receiving a response message sent by the first network device, wherein the response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

In the terminal provided in the embodiment of the present invention, when a bandwidth of a target frequency band is greater than a preset threshold, the terminal sends a first request message to a first network device, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated by the first network device to the terminal in a first network, and the second frequency band is a resource allocated by a second network device to the terminal in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 101 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 102, such as helping the user send and receive e-mails, browse web pages, access streaming media, and the like.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive an audio or video signal. The input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.

The terminal 100 also includes at least one sensor 105, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and receives and executes commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 8, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the terminal, and is not limited herein.

The interface unit 108 is an interface for connecting an external device to the terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 100 or may be used to transmit data between the terminal 100 and the external device.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the terminal. Processor 110 may include one or more processing units; alternatively, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and optionally, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal 100 includes some functional modules that are not shown, and thus, the detailed description thereof is omitted.

An embodiment of the present invention further provides a terminal, which may include the processor 110 shown in fig. 8, the memory 109, and a computer program stored in the memory 109 and capable of being executed on the processor 110, where the computer program, when executed by the processor 110, implements each process of the method for reducing interference shown in any one of fig. 4 to 6 in the foregoing method embodiments, and can achieve the same technical effect, and details are not described here to avoid repetition.

An embodiment of the present invention further provides a first network device 140, and as shown in fig. 9, the first network device 140 includes: a receiving module 141 and a transmitting module 142;

the receiving module 141 is configured to receive a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

the sending module 142 is configured to send a first response message to the terminal, where the first response message is used for the terminal to confirm that the first network device transmits data in the target frequency band.

Optionally, the receiving module 141 is further configured to receive, before receiving the first request message sent by the terminal, a second request message sent by the terminal, where the second request message is used for the terminal to request the first network device to allocate, to the terminal, a first resource corresponding to a first frequency band, a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before allocating the first resource; wherein, the difference between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is less than or equal to the preset threshold, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped; the sending module 142 is further configured to send a resource indication message to the terminal, where the resource indication message is used to indicate the first resource.

The first network device provided in the embodiment of the present invention is capable of implementing each process shown in any one of fig. 4 to fig. 6 in the foregoing method embodiments, and details are not described here again in order to avoid repetition.

The embodiment of the present invention provides a first network device, where a terminal sends a first request message to the first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except for a first overlapping frequency band, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a resource allocated by the first network device to the terminal in a first network, and the second frequency band is a resource allocated by a second network device to the terminal in a second network; and the terminal receives a response message sent by the first network equipment, wherein the response message is used for confirming that the first network equipment transmits data in the target frequency band. By the scheme, when the terminal forms a dual connection with the first network and the second network, namely, simultaneously performs data transmission with a first network device in the first network through a first frequency band, and performs data transmission with a second network device in the second network through a second frequency band, and the first frequency band and the second frequency band have an overlapping part (i.e., an overlapping frequency band), the terminal can determine that the terminal and the first network device perform data transmission through a target frequency band (the bandwidth of the target frequency band is greater than a preset threshold value) except the overlapping frequency band in the first frequency band through interaction with the first network device, so that the problem that when the terminal forms a dual connection with the first network and the second network, the receiving sensitivity of the terminal may be reduced due to harmonic interference can be solved.

An embodiment of the present invention further provides a first network device, which may include the processor 151 shown in fig. 10, the memory 152, and a computer program stored on the memory 152 and operable on the processor 151, where the computer program, when executed by the processor 151, implements each process of the method for reducing interference shown in any one of fig. 4 to fig. 6 in the foregoing method embodiments, and can achieve the same technical effect, and details are not described herein for avoiding repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method for reducing interference shown in any one of fig. 4 to 6 in the foregoing method embodiments, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for reducing interference, applied to a terminal, the method comprising:

sending a first request message to a first network device when a bandwidth of a target frequency band is greater than a preset threshold, where the first request message is used to request the first network device to transmit data in the target frequency band, the target frequency band is a frequency band of a first frequency band except a first overlapping frequency band, the first overlapping frequency band is a part where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

receiving a response message sent by the first network device, where the response message is used for the terminal to confirm that the first network device transmits data in the target frequency band; before sending the first request message to the first network device, the method further includes:

sending a second request message to the first network device, where the second request message is used to request the first network device to allocate the first resource corresponding to the first frequency band to the terminal, where a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before the first resource is allocated; the difference value between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is smaller than or equal to the preset threshold value, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped;

and receiving a resource indication message sent by the first network equipment, wherein the resource indication message is used for indicating the first resource.

2. The method of claim 1, wherein a center frequency of the third frequency band is the same as a center frequency of the first frequency band.

3. A method for reducing interference, applied to a first network device, the method comprising:

receiving a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band, the target frequency band is a frequency band in a first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

sending a first response message to the terminal, wherein the first response message is used for the terminal to confirm that the first network equipment transmits data in the target frequency band; before the receiving the first request message sent by the terminal, the method further includes:

receiving a second request message sent by the terminal, where the second request message is used by the terminal to request the first network device to allocate a first resource corresponding to the first frequency band to the terminal, where a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network before the first network device allocates the first resource; the difference value between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is smaller than or equal to the preset threshold value, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped;

and sending a resource indication message to the terminal, wherein the resource indication message is used for indicating the first resource.

4. The method of claim 3, wherein a center frequency of the third frequency band is the same as a center frequency of the first frequency band.

5. A terminal, characterized in that the terminal comprises: a transmitting module and a receiving module;

the receiving module is configured to receive a response message sent by the first network device, where the response message is used by the terminal to confirm that the first network device transmits data in the target frequency band; the sending module is further configured to send, to a first network device, a second request message before the sending of the first request message to the first network device, where the second request message is used to request the first network device to allocate the first resource corresponding to the first frequency band to the terminal, a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before the first resource is allocated; the difference value between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is smaller than or equal to the preset threshold value, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped;

the receiving module is further configured to receive a resource indication message sent by the first network device, where the resource indication message is used to indicate the first resource.

6. The terminal of claim 5, wherein a center frequency of the third frequency band is the same as a center frequency of the first frequency band.

7. A first network device, wherein the first network device comprises: the device comprises a receiving module and a sending module;

the receiving module is configured to receive a first request message sent by a terminal, where the first request message is used for the terminal to request the first network device to transmit data in a target frequency band, the target frequency band is a frequency band in the first frequency band except a first overlapping frequency band, and a bandwidth of the target frequency band is greater than a preset threshold, the first overlapping frequency band is a portion where the first frequency band and a second frequency band overlap, the first frequency band is a frequency band corresponding to a first resource allocated to the terminal by the first network device in a first network, and the second frequency band is a frequency band corresponding to a second resource allocated to the terminal by a second network device in a second network;

the sending module is configured to send a first response message to the terminal, where the first response message is used for the terminal to confirm that the first network device transmits data in the target frequency band;

the receiving module is further configured to receive, before receiving a first request message sent by a terminal, a second request message sent by the terminal, where the second request message is used for the terminal to request the first network device to allocate, to the terminal, a first resource corresponding to the first frequency band, a bandwidth of the first frequency band is greater than a bandwidth of a third frequency band, and the third frequency band is a frequency band corresponding to a third resource allocated to the terminal in the first network by the first network device before allocating the first resource; the difference value between the bandwidth of the third frequency band and the bandwidth of a second overlapped frequency band is smaller than or equal to the preset threshold value, and the second overlapped frequency band is a part where the second frequency band and the third frequency band are overlapped;

the sending module is further configured to send a resource indication message to the terminal, where the resource indication message is used to indicate the first resource.

8. The first network device of claim 7, wherein a center frequency of the third frequency band is the same as a center frequency of the first frequency band.

9. A terminal comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of reducing interference according to claim 1 or 2.

10. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of reducing interference according to claim 3 or 4.