Method for eliminating direct-current leakage, and device, medium and product

Abstract

The present application belongs to the technical field of communications. Disclosed are a method for eliminating direct-current leakage, and a device, a medium and a product. The method for eliminating direct-current leakage is applied to an Internet-of-Things base station, and comprises: determining an indication object on the basis of a sending mode of a carrier wave signal, and determining indication content on the basis of the carrier wave signal; and sending the indication content to the indication object, such that the indication object eliminates direct-current leakage on the basis of the indication content.

Description

Method, device, medium and product for eliminating direct current leakage

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202410974560.0, filed on July 19, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a method, device, medium and product for eliminating direct current leakage. BACKGROUND

[0004] A CW (Carrier Wave) signal is a continuously transmitted unmodulated radio frequency signal, which is characterized by stable frequency and constant power, and has a continuous waveform. In backscatter communication, the CW signal in the environment can be used as an excitation signal for Internet of Things devices to communicate in a backscatter manner. Since the CW signal has good stability and continuity, it is suitable for use as an excitation signal for backscatter communication.

[0005] Currently, A-IoT (Ambient Iot) considers deployment modes of NR (New Radio) in-band, NR guard band and NR independent band. In the deployment scenarios of NR in-band and NR guard band, the traditional base station and UE (User Equipment) working in the same frequency band as A-IoT will receive the CW signal, which is similar to the direct current signal, thus easily causing direct current leakage and causing signal interference. SUMMARY

[0006] The main purpose of the present application is to provide a method, network device, storage medium and computer program product for eliminating direct current leakage.

[0007] To achieve the above purpose, the present application provides a method for eliminating direct current leakage, which comprises: determining an indication object based on the transmission mode of a carrier signal, and determining indication content based on the carrier signal; and sending the indication content to the indication object, so that the indication object eliminates direct current leakage according to the indication content.

[0008] The present application also provides a network device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the method for eliminating direct current leakage as described above.

[0009] The embodiment of the present application further provides a storage medium, which is a computer readable storage medium, and a computer program is stored in the storage medium, and the computer program is executed by a processor to implement the steps of the direct current leakage elimination method. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a structural schematic diagram of a running device of a hardware running environment related to an embodiment of the present application;

[0011] Fig. 2 is a flow schematic diagram of a direct current leakage elimination method according to a first embodiment;

[0012] Fig. 3 is a flow schematic diagram of a direct current leakage elimination method according to a second embodiment;

[0013] Fig. 4 is a first transmission mode schematic diagram according to a third embodiment;

[0014] Fig. 5 is a second transmission mode schematic diagram according to the third embodiment;

[0015] Fig. 6 is a new MAC CE schematic diagram according to the third embodiment;

[0016] Fig. 7 is another new MAC CE schematic diagram according to the third embodiment;

[0017] Fig. 8 is a first transmission mode schematic diagram according to a fourth embodiment;

[0018] Fig. 9 is a second transmission mode schematic diagram according to the fourth embodiment;

[0019] Fig. 10 is an interaction flow schematic diagram according to the fourth embodiment;

[0020] Fig. 11 is a first transmission mode schematic diagram according to a fifth embodiment;

[0021] Fig. 12 is a second transmission mode schematic diagram according to the fifth embodiment;

[0022] Fig. 13 is a flow schematic diagram of a direct current leakage elimination method according to a sixth embodiment;

[0023] Fig. 14 is a flow schematic diagram of a direct current leakage elimination method according to a seventh embodiment;

[0024] Fig. 15 is a structural schematic diagram of a direct current leakage elimination device provided by the embodiment of the present application.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0026] It is to be understood that the specific embodiments described herein are merely illustrative of the application and do not limit the scope of the application.

[0027] With the wide application of modern mobile communication technology, for different needs such as broadcast, radar, television, etc., various small size, flexible operation, high reliability special signal sources are emerging, such as single tone signal (signal with only one frequency), pulse signal, etc. As an indispensable key component in communication system, signal source is mainly used to provide excitation or analog simulation signal. However, due to the relatively high power of such signals, the spectrum and direct current signal are similar, only at a certain frequency the amplitude is not 0. When the receiving end of the traditional UE (User Equipment) or base station receives such signals, it will produce direct current leakage (DC Leakage), that is, the phenomenon of spectrum center protrusion caused by the existence of direct current signal, which will interfere with the signals in adjacent positions. Especially in the A-IoT (Ambient Iot) network studied by 3GPP, it is necessary to send CW (Carrier Wave) signal as the excitation source of A-IoT device, which is usually a single tone signal with high power. If the traditional base station and terminal receive such signals, direct current leakage will occur at the receiving end.

[0028] Currently, the A-IoT subject of 3GPP is to improve the connectivity and energy efficiency of Internet of Things devices, and the application scenarios include automated warehouse, smart home, implantable health care, etc. A-IoT refers to a new type of Internet of Things device that mainly uses environmental energy collected from radio waves, light, motion, heat or any other available environmental energy as the driving force. According to its energy storage capacity and the ability to generate radio frequency signals for transmission, A-IoT devices can be divided into the following three categories:

[0029] Device A: no energy storage, no independent signal generation;

[0030] Device B: with energy storage, no independent signal generation, the stored energy can be used to amplify the reflected signal;

[0031] Device C: with energy storage, with independent signal generation.

[0032] In order to realize low cost, some A-IoT devices do not have the condition to generate independent signals, which also means that these A-IoT devices cannot communicate with the outside world. Backscatter communication can realize the communication between A-IoT devices and the outside world, which is a representative technology of extremely low power consumption communication, and is also an important potential technology to realize low cost and passivity of Internet of Things terminals, and is widely used in the field of RFID (Radio Frequency Identification).

[0033] Most of the communication methods in the prior art can be considered as active communication methods, that is, the sender actively generates electromagnetic waves, and transmits signals based on the modulation of the electromagnetic waves. Backscatter communication adopts another mode, that is, the sender does not need to actively generate signals, but communicates by reflecting electromagnetic waves generated by other devices. The key of backscatter communication technology is to use the radio frequency signal in the environment as an excitation signal. When the radio frequency signal in the environment is received, the Internet of Things device changes the phase, amplitude or frequency of the signal and other parameters by backscatter, embeds its own information into the radio frequency signal, and transmits it back to the receiving end. Since the Internet of Things device does not need to actively transmit signals, the energy consumption is greatly reduced, and it is particularly suitable for low-power Internet of Things devices such as sensor nodes, smart tags, etc.

[0034] In backscatter communication, the excitation signal is usually a radio frequency signal that already exists in the environment. These radio frequency signals can come from signals emitted by communication devices such as base stations, WI-FI routers, mobile phones, etc., or other radio frequency signal sources such as radio stations, radars, etc. The type of excitation signal is usually a CW signal.

[0035] CW signal is a kind of unmodulated radio frequency signal that is continuously emitted, and its characteristics are stable frequency, constant power, and continuous waveform. In backscatter communication, the CW signal in the environment can be used as an excitation signal for Internet of Things devices to communicate by backscatter. Since the stability and continuity of the CW signal are good, it is suitable for use as an excitation signal for backscatter communication. At present, the CW signal type in A-IoT network is defined as single-tone signal and multi-tone signal. Among them, multi-tone signal refers to multiple single-tone signals.

[0036] In order to ensure coverage, the output power of the CW signal cannot be too low, and a certain power must be reached to ensure that the A-IoT device can correctly receive and backscatter the CW signal. Too low CW signal power can cause the device to fail to correctly demodulate the signal, thereby affecting the reliability and stability of communication. Currently, A-IoT considers deployment methods such as NR (New Radio) in-band, NR guard band, and NR independent band. In the deployment scenarios of NR in-band and NR guard band, the traditional base station and UE working in the same frequency band as A-IoT will receive the CW signal. Since the CW signal spectrum is similar to the DC signal, DC leakage is generated, and the problem of DC leakage caused by the CW signal to the traditional base station and UE needs to be solved.

[0037] To solve the above technical problems, referring to FIG. 1, FIG. 1 is a schematic diagram of the running device structure of the hardware running environment involved in the embodiment scheme of the present application.

[0038] As shown in FIG. 1, the running device can include a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 can include a display screen, an input unit such as a keyboard, and can also include a standard wired interface, a wireless interface. The network interface 1004 can include a standard wired interface, a wireless interface (such as a wireless fidelity (WI-FI) interface). The memory 1005 can be a high-speed random access memory (RAM), and can also be a stable non-volatile memory (NVM), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0039] Those skilled in the art can understand that the structure shown in FIG. 1 does not constitute a limitation on the running device, and can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0040] As shown in FIG. 1, the memory 1005 as a storage medium can include an operating system, a data storage module, a network communication module, a user interface module, and a computer program.

[0041] In the running device shown in FIG. 1, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the running device of the application can be arranged in the running device, and the running device calls the computer program stored in the memory 1005 through the processor 1001 and performs the following operations: determining an indication object based on the transmission mode of the carrier signal, and determining the indication content based on the carrier signal; transmitting the indication content to the indication object, so that the indication object eliminates the direct current leakage according to the indication content.

[0042] Exemplarily, the transmission mode includes downlink spectrum transmission and / or uplink spectrum transmission, and the method further includes: in the case that the carrier signal is transmitted to the Internet of Things device by the Internet of Things base station and / or carrier node, determining that the transmission mode of the carrier signal is downlink spectrum transmission; in the case that the carrier signal is transmitted to the Internet of Things device by the first user equipment, determining that the transmission mode of the carrier signal is uplink spectrum transmission.

[0043] Exemplarily, the step of determining the indication object based on the transmission mode of the carrier signal includes: in the case that the transmission mode is downlink spectrum transmission, determining that the indication object is the second user equipment; in the case that the transmission mode is uplink spectrum transmission, determining that the indication object is the traditional base station.

[0044] Exemplarily, the step of determining the indication content based on the carrier signal includes: identifying whether the carrier signal is periodic transmission; in the case that the carrier signal is periodic transmission, determining that the indication content includes the number of tones, the frequency domain position of the tone and the transmission period; in the case that the carrier signal is non-periodic transmission, determining that the indication content includes the number of tones and the frequency domain position of the tone.

[0045] Exemplarily, the step of transmitting the indication content to the indication object includes: transmitting the indication content to the second user equipment through a first indication mode; and / or, transmitting the indication content to the traditional base station through a second indication mode.

[0046] Exemplarily, the first indication mode includes at least one of radio resource control signaling, medium access control element and downlink control information.

[0047] Exemplarily, the indication content is sent to the second user equipment through the radio resource control signaling, including: in the case that the carrier signal is non-periodically sent, two fields are added in the radio resource control signaling, the two fields are respectively used for indicating the tone number and the frequency domain position of the tone to the second user equipment; in the case that the carrier signal is periodically sent, three fields are added in the radio resource control signaling, the three fields are respectively used for indicating the tone number, the frequency domain position of the tone and the transmission period to the second user equipment.

[0048] Exemplarily, the media access control element includes an existing media access control element and / or a newly added media access control element, and the step of sending the indication content to the second user equipment through the media access control element includes: adding at least one field in the existing media access control element, the at least one field being used for indicating the indication content to the second user equipment; adding at least one field in the newly added media access control element, the at least one field being used for indicating the indication content to the second user equipment.

[0049] Exemplarily, the downlink control information includes existing downlink control information and / or newly added downlink control information, and the step of sending the indication content to the second user equipment through the downlink control information includes: adding at least one field in the existing downlink control information, the at least one field being used for indicating the indication content to the second user equipment; adding at least one field in the newly added downlink control information, the at least one field being used for indicating the indication content to the second user equipment.

[0050] Exemplarily, the step of sending the indication content to the legacy base station through the second indication mode includes: sending an indication carrier signal position request message to the legacy base station, so that the legacy base station generates and sends an indication carrier signal position request confirmation message according to the indication carrier signal position request message; in the case that the indication carrier signal position request confirmation message includes preset content, indicating the indication content to the legacy base station through at least one field in a carrier position message.

[0051] Exemplarily, the processor 1001 can invoke the computer program stored in the memory 1005, and further perform the following operations: receiving the indication content sent by the Internet of Things base station; eliminating the direct current leakage according to the indication content.

[0052] Exemplarily, the indication content includes at least one of the number of tones, the frequency domain position of the tones, and the transmission period, and the step of receiving the indication content sent by the Internet of Things base station further includes: receiving an indication carrier signal position request message sent by the Internet of Things base station; determining whether the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station according to the indication carrier signal position request message; if the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station, generating an indication carrier signal position request confirmation message containing preset content, and sending the indication carrier signal position request confirmation message to the Internet of Things base station, so that the Internet of Things base station indicates the indication content to the conventional base station through at least one field in the carrier position message according to the indication carrier signal position request confirmation message.

[0053] First embodiment

[0054] Referring to FIG. 2, FIG. 2 is a flowchart of a method for eliminating direct current leakage according to the first embodiment, and the method includes:

[0055] In step S10, the indication object is determined based on the transmission mode of the carrier signal, and the indication content is determined based on the carrier signal.

[0056] In the embodiments of the present application, the transmission of the carrier wave (CW) signal can be divided into three forms according to different sending ends, including sending the CW signal from the Internet of Things (A-IoT, Ambient Iot) base station to the Internet of Things device, sending the CW signal from the first user equipment (User Equipment, UE) to the Internet of Things device, and sending the CW signal from the carrier node to the Internet of Things device.

[0057] Exemplarily, different transmission modes of the CW signal can be determined according to different sending ends, and the transmission mode of the CW signal in the embodiments of the present application includes downlink spectrum transmission and / or uplink spectrum transmission. In the case where the carrier signal is sent from the Internet of Things base station and / or the carrier node to the Internet of Things device, the transmission mode of the carrier signal is determined to be downlink spectrum transmission; in the case where the carrier signal is sent from the first user equipment to the Internet of Things device, the transmission mode of the carrier signal is determined to be uplink spectrum transmission.

[0058] Exemplarily, the objects affected by direct current leakage under different transmission modes are different, so the corresponding indication objects are determined according to different transmission modes, so that the receiving end that may be affected by direct current leakage can eliminate direct current leakage in time.

[0059] Exemplarily, in the case of downlink spectrum transmission, the second user equipment (legacy UE) is determined as the indication object, i.e., in the case of transmitting the CW signal from the IoT base station to the IoT device and / or transmitting the CW signal from the CW node to the IoT device.

[0060] Exemplarily, in the case of uplink spectrum transmission, the legacy base station is determined as the indication object, i.e., in the case of transmitting the CW signal from the first user equipment to the IoT device.

[0061] Exemplarily, different transmission forms of the carrier signal determine that the information required for eliminating the DC leakage is different, and therefore, the indication content is determined according to the carrier signal, so that the indication object eliminates the DC leakage according to the indication content.

[0062] Exemplarily, in the case of periodic transmission of the carrier signal, the indication content includes the number of tones, the frequency domain position of the tones, and the transmission period; in the case of aperiodic transmission of the carrier signal, the indication content includes the number of tones and the frequency domain position of the tones.

[0063] In step S20, the indication content is transmitted to the indication object, so that the indication object eliminates the DC leakage according to the indication content.

[0064] Further, the indication object is determined based on the transmission mode of the carrier signal, and after the indication content is determined based on the carrier signal, the indication content is transmitted to the indication object, so that the indication object eliminates the DC leakage according to the indication content.

[0065] Exemplarily, different indication objects correspond to different indication modes, for example, when the indication object is the second user equipment, the indication can be performed through at least one of the radio resource control signaling, the medium access control element, and the downlink control information, and the second user equipment eliminates the influence of the DC leakage by adopting the radio frequency DC calibration and the baseband DC elimination scheme according to the subcarrier position of the CW signal; when the indication object is the legacy base station, the legacy base station can be indicated by the carrier position message, so that the legacy base station eliminates the DC signal at the receiving end according to the indication content.

[0066] The above scheme is used in the embodiment, specifically, the indication object is determined based on the transmission mode of the carrier signal, and the indication content is determined based on the carrier signal; the indication content is transmitted to the indication object, so that the indication object eliminates the DC leakage according to the indication content. The indication object that needs to eliminate the DC leakage can be determined according to the transmission mode of the carrier signal, and the indication content for eliminating the DC leakage is determined according to the carrier signal, so that the indication object can eliminate the DC leakage according to the indication content, and the signal interference is reduced.

[0067] Second embodiment

[0068] Referring to FIG. 3, which is a flowchart of a method for eliminating direct current leakage according to a second embodiment, the second embodiment is based on the first embodiment. In the second embodiment, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereinafter. On this basis, referring to FIG. 3, step S20 includes steps S201 and / or S202:

[0069] Step S201: sending the indication content to the second user equipment by the first indication mode.

[0070] For example, the first indication mode includes at least one of radio resource control (RRC) signaling, media access control control element (MAC CE), and downlink control information (DCI).

[0071] For example, sending the indication content to the second user equipment by the RRC signaling includes: in the case of non-periodic transmission of the carrier signal, adding two fields in the RRC signaling, the two fields being respectively used to indicate the number of tones and the frequency domain position of the tone to the second user equipment; in the case of periodic transmission of the carrier signal, adding three fields in the RRC signaling, the three fields being respectively used to indicate the number of tones, the frequency domain position of the tone, and the transmission period to the second user equipment.

[0072] For example, in the mode of sending the indication content to the second user equipment (legacy UE) by the RRC signaling, when the CW signal is non-periodically transmitted, two fields are added to respectively indicate the number of all tones of the CW signal transmitted in the downlink spectrum and the subcarrier position of each tone; when the CW signal is periodically transmitted, three fields are added to respectively indicate the number of all tones of the CW signal transmitted in the downlink spectrum, the subcarrier position of each tone, and the transmission period.

[0073] Exemplarily, the media access control element comprises an existing media access control element and / or a new media access control element, and the step of sending the indication content to the second user equipment via the media access control element comprises: adding at least one field in the existing media access control element, the at least one field being used to indicate the indication content to the second user equipment; adding at least one field in the new media access control element, the at least one field being used to indicate the indication content to the second user equipment.

[0074] As one of the embodiments, the indication content is sent to the second user equipment (legacy UE) via a MAC CE, and the legacy UE can be indicated the position of the CW signal in the downlink spectrum transmission by adding some fields in the existing MAC CE. If the CW signal is sent non-periodically, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is sent periodically, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0075] As another of the embodiments, the indication content is sent to the second user equipment (legacy UE) via a MAC CE, and the legacy UE can be indicated the position of the CW signal in the downlink spectrum transmission by adding a new CW command MAC CE. If the CW signal is sent non-periodically, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is sent periodically, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0076] Exemplarily, the downlink control information comprises existing downlink control information and / or new downlink control information, and the step of sending the indication content to the second user equipment via the downlink control information comprises: adding at least one field in the existing downlink control information, the at least one field being used to indicate the indication content to the second user equipment; adding at least one field in the new downlink control information, the at least one field being used to indicate the indication content to the second user equipment.

[0077] As one of the embodiments, the indication content is sent to the second user equipment (legacy UE) through DCI. The position of the CW signal in the downlink spectrum transmission can be indicated to the legacy UE by adding some fields in the existing DCI. If the CW signal is sent aperiodically, two fields are added in the DCI to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is sent periodically, three fields are added in the DCI to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0078] As another of the embodiments, the indication content is sent to the second user equipment (legacy UE) through DCI. The position of the CW signal in the downlink spectrum transmission can also be indicated to the legacy UE by adding a new DCI. If the CW signal is sent aperiodically, two fields are added in the DCI to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is sent periodically, three fields are added in the DCI to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0079] Step S202: sending the indication content to the legacy base station through the second indication mode.

[0080] For example, the step of sending the indication content to the legacy base station through the second indication mode includes sending an indication carrier signal position request message to the legacy base station, so that the legacy base station generates and sends an indication carrier signal position request confirmation message according to the indication carrier signal position request message; and in the case that the indication carrier signal position request confirmation message includes preset content, indicating the indication content to the legacy base station through at least one field in a carrier position message.

[0081] For example, the A-IoT base station sends a request for indicating the position of the CW signal to the legacy base station, the legacy base station replies whether the A-IoT base station needs to send signaling for indicating the position of the CW signal, and the A-IoT base station indicates the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period (if the CW signal is sent periodically, the transmission period is indicated, otherwise, the transmission period is not indicated) to the legacy base station after receiving a positive reply.

[0082] According to the above scheme, the indication content is sent to the legacy UE through at least one of the radio resource control signaling, the medium access control element and the downlink control information, and / or the indication content is sent to the legacy base station through the second indication mode, so that the legacy UE and / or the legacy base station can eliminate the direct current leakage and reduce signal interference according to the indication content.

[0083] Third embodiment

[0084] The third embodiment of the present application is based on any of the preceding embodiments. In the third embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above description, and will not be described hereinafter. On this basis, the third embodiment further discloses a DC leakage elimination method in the scenario of transmitting a CW signal from an A-IoT base station to an A-IoT device.

[0085] Referring to FIG. 4 and FIG. 5, FIG. 4 is a schematic diagram of a first transmission mode according to the third embodiment, and FIG. 5 is a schematic diagram of a second transmission mode according to the third embodiment. As shown in the figures, when the A-IoT base station transmits a CW signal to the A-IoT device in the downlink spectrum, if the receiver of the legacy UE receives the CW signal, the DC leakage phenomenon may occur, thereby interfering with other signals around the CW signal frequency in the receiving bandwidth of the legacy UE, and affecting the reception of the legacy UE. Therefore, the legacy UE needs to know whether there are subcarriers affected by the DC leakage in the receiving bandwidth, and then take different processing according to whether there are subcarriers affected by the DC leakage in the receiving bandwidth, such as radio frequency DC calibration and baseband DC elimination scheme. The A-IoT base station can inform the legacy UE of the frequency domain position of the CW signal through RRC signaling or MAC CE or DCI. Due to the needs of periodic inventory and the like, the CW signal needs to be transmitted periodically, and at this time, the legacy UE also needs to be informed of the period of transmitting the CW signal.

[0086] For example, in the manner of transmitting indication content to the second user equipment (legacy UE) through RRC signaling, there are differences in the determined indication content according to whether the CW signal is periodically transmitted or non-periodically transmitted.

[0087] For example, when the CW signal is non-periodically transmitted, the A-IoT base station only needs to inform the legacy UE of the frequency domain position of the CW signal. First, considering that the CW signal type is single-tone signal and multi-tone signal, the number of tones needs to be informed to the legacy UE. A field indicating the number of tones contained in the CW signal is added. Second, a field indicating the subcarrier position of all tones of the CW signal transmitted in the downlink spectrum is added. For example, the position of each tone of the CW signal relative to point A is indicated, and the unit is subcarrier. The value range is [0, 8191], which is represented by 13 bits of signed number, wherein 0-6666 is a valid index value, and 6667-8191 is a reserved bit.

[0088] Exemplarily, when the CW signal is periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE. For example, a field indicating the transmission period of the CW signal is added, and the value is [10, 20, 40, 80, 160, 320, 640, 1280, 2560, 5120, 10240] ms.

[0089] Exemplarily, the indication content is sent to the second user equipment (legacy UE) through a MAC CE, including two kinds, one is to add some fields in the existing MAC CE, and the other is to add a new CW command MAC CE.

[0090] Exemplarily, some fields are added in the existing MAC CE to indicate the position of the CW signal in the downlink spectrum transmission to the legacy UE. If the CW signal is non-periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0091] Exemplarily, a new CW command MAC CE is added to indicate the position of the CW signal in the downlink spectrum transmission to the legacy UE. If the CW signal is non-periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE.

[0092] Referring to FIG. 6, FIG. 6 is a schematic diagram of a new MAC CE according to a third embodiment, as shown in FIG. 6, the fields contained in the MAC CE include CWToneNum and Tone i , i is equal to CWToneNum. CWToneNum represents the number of all tones of the CW signal, and the value is [0, 11], and the actual number of tones is the indicated value + 1. The subcarrier position of each tone is indicated by the field Tone i , Tone i represents the position of the i-th tone on the subcarrier relative to point A, and the unit is subcarrier. The value range is [0, 8191], which is represented by 13-bit signed number, wherein 0-6666 is a valid index value, and 6667-8191 is a reserved bit. The rest is a reserved bit, which is 0.

[0093] Exemplarily, if the CW signal is periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the legacy UE.

[0094] Referring to FIG. 7, FIG. 7 is a schematic diagram of another new MAC CE according to a third embodiment. As shown in FIG. 7, the MAC CE includes three parts. The first part is CWToneNum, which indicates the number of all tones of the CW signal and takes a value of [0, 11]. The actual number of tones is the indicated value + 1. The second part is ToneOffset, which indicates the position of the i-th tone relative to point A in the subcarrier, and takes a value of [0, 8191] and is represented by a 13-bit signed number. The value range is [0, 6666], which is a valid index value, and 6667-8191 is a reserved bit. The third part is CWtrans-Timer, which indicates the transmission period of the CW signal and takes a value of [10, 20, 40, 80, 160, 320, 640, 1280, 2560, 5120, 10240] ms. The remaining bits are reserved and set to 0. The index indicated by CWtrans-Timer and the corresponding transmission period are shown in Table 1. i

[0095] Table 1: Example table of index indicated by CWtrans-Timer and corresponding transmission period

[0096] For example, the indication content is sent to the second user equipment (legacy UE) through DCI. If the CW signal is non-periodically sent, two fields are added in the DCI. One field indicates the number of all tones of the CW signal, and the other field indicates the frequency domain position of each tone to the legacy UE. If the CW signal is periodically sent, three fields are added in the DCI to respectively indicate the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period to the legacy UE.

[0097] In the above scheme, the indication content is sent to the legacy UE through at least one of the radio resource control signaling, the medium access control element, and the downlink control information in the scenario where the A-IoT base station sends the CW signal to the A-IoT device, so that the legacy UE can eliminate the direct current leakage and reduce signal interference according to the indication content.

[0098] Fourth embodiment

[0099] The fourth embodiment of the present application is based on any of the preceding embodiments. In the fourth embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above description, and will not be described hereinafter. On this basis, the fourth embodiment further discloses a direct current leakage elimination method in the scenario where the UE sends the CW signal to the A-IoT device.

[0100] ​Referring to FIG. 8 and FIG. 9, FIG. 8 is a schematic diagram of a first transmission mode according to a fourth embodiment, and FIG. 9 is a schematic diagram of a second transmission mode according to the fourth embodiment. As shown in the figures, when the UE sends the CW signal to the A-IoT device in the uplink spectrum, if the receiver of the traditional NR or LTE base station works in the same frequency band, the DC leakage will affect the working bandwidth, thereby causing interference. In order to eliminate the direct current effect, the A-IoT base station needs to send the frequency domain position (and the transmission period) of the CW signal to the traditional base station. First, the A-IoT base station sends a request indicating the position of the CW signal to the traditional base station; second, the traditional base station replies to the A-IoT base station whether to send the signaling indicating the position of the CW signal; finally, the A-IoT base station sends the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period (if the CW signal is periodically transmitted, the transmission period is indicated, otherwise it is not indicated) to the traditional base station after receiving the positive reply.

[0101] Referring to FIG. 10, FIG. 10 is a schematic diagram of an interaction flow according to the fourth embodiment. As shown in FIG. 10, the interaction process between the A-IoT base station and the traditional base station includes: first, the A-IoT base station sends the CW Location Request message to the traditional NR or LTE base station, and sends the current working frequency band to the traditional base station; second, the traditional base station receives the CW Location Request, judges whether the uplink frequency band currently worked by the base station overlaps with the uplink frequency band of the A-IoT base station, and sends the CW Location Request Acknowledge message to the A-IoT base station, if there is an overlapping part in the frequency band, the reply is Yes, and if there is no overlapping part, the reply is No; third, the A-IoT base station receives the CW Location Request Acknowledge message Yes, and sends the frequency domain position (and the transmission period) of the CW signal to the traditional base station through the CW Location message, so that the traditional base station can eliminate the DC signal at the receiving end according to the indication information. The field meanings contained in the CW Location message are shown in Table 2.

[0102] Table 2, field meanings contained in the CW Location message and examples

[0103] Exemplarily, if the CW signal is sent non-periodically, the CW Location message contains the first two fields in Table 2: CWToneNum and CWFreqLocation, to indicate the number of all tones of the CW signal and the frequency domain location of each tone to the legacy base station. If the CW signal is sent periodically, the CW Location message contains three fields: CWToneNum, CWFreqLocation and CWtrans-Timer, to indicate the number of all tones of the CW signal, the frequency domain location of each tone and the transmission period to the legacy base station.

[0104] The embodiment above, specifically in the scenario that the UE sends the CW signal to the A-IoT device, sends the indication content to the legacy base station through the CW Location message, so that the legacy base station can eliminate the DC leakage and reduce signal interference according to the indication content.

[0105] Fifth Embodiment

[0106] The fifth embodiment of the present application is based on any of the preceding embodiments. In the fifth embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above introduction, and will not be described hereinafter. On this basis, the embodiment further discloses a DC leakage elimination method in the scenario that the CW node sends the CW signal to the A-IoT device.

[0107] Referring to FIG. 11 and FIG. 12, FIG. 11 is a schematic diagram of a first transmission mode according to the fifth embodiment, and FIG. 12 is a schematic diagram of a second transmission mode according to the fifth embodiment. As shown in the figures, when the CW node sends the CW signal to the A-IoT device, the CW signal is sent in the downlink spectrum, which will cause interference to the receiver of the legacy UE. The CW node acts as a relay node, and the sending of the CW signal is instructed by the A-IoT base station. Therefore, the frequency domain location of the CW signal can be informed to the legacy UE by the A-IoT base station, so that the legacy UE can accurately locate the subcarrier where the CW signal is located, and adopt the RF DC calibration and baseband DC elimination scheme to eliminate the DC influence. The A-IoT base station can inform the legacy UE of the frequency domain location of the CW signal through RRC signaling or MAC CE or DCI. Due to the periodic inventory and other needs, the CW signal needs to be sent periodically, and at this time, the period of sending the CW signal also needs to be informed to the legacy UE.

[0108] Exemplarily, in the way of sending the indication content to the second user equipment (legacy UE) through RRC signaling, there is a difference in the determined indication content according to whether the CW signal is sent periodically or non-periodically.

[0109] Exemplarily, when the CW signal is non-periodically transmitted, the A-IoT base station only needs to inform the traditional UE of the frequency domain position of the CW signal transmitted in the downlink spectrum. Two fields are added to respectively indicate the number of tones contained in the CW signal and the subcarrier position of all tones of the CW signal. When the CW signal is periodically transmitted, three fields are added to respectively indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the traditional UE.

[0110] Exemplarily, the indication content is transmitted to the second user equipment (traditional UE) through the MAC CE, including two kinds, one is to add some fields in the existing MAC CE, and the other is to add a new CW command MAC CE.

[0111] Exemplarily, some fields are added in the existing MAC CE to indicate the position of the CW signal transmitted in the downlink spectrum to the traditional UE. If the CW signal is non-periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the traditional UE. If the CW signal is periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the traditional UE.

[0112] Exemplarily, a new CW command MAC CE is added to indicate the position of the CW signal transmitted in the downlink spectrum to the traditional UE. If the CW signal is non-periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the traditional UE. If the CW signal is periodically transmitted, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the traditional UE.

[0113] Exemplarily, the indication content is transmitted to the second user equipment (traditional UE) through the DCI. If the CW signal is non-periodically transmitted, two fields are added in the DCI, one field indicates the number of all tones of the CW signal, and the other field indicates the frequency domain position of each tone to the traditional UE. If the CW signal is periodically transmitted, three fields are added in the DCI to respectively indicate the number of all tones of the CW signal, the frequency domain position of each tone and the transmission period to the traditional UE.

[0114] The embodiment transmits the indication content to the traditional UE through at least one of the radio resource control signaling, the medium access control element and the downlink control information, so that the traditional UE can eliminate the direct current leakage and reduce signal interference according to the indication content.

[0115] Sixth embodiment

[0116] Referring to FIG. 13, which is a flowchart illustrating a method for eliminating DC leakage according to a sixth embodiment, the sixth embodiment of the present application is based on any one of the above embodiments. In the sixth embodiment of the present application, the same or similar content as any one of the above embodiments can be referred to the above description, and will not be described hereinafter. On this basis, referring to FIG. 13, for a traditional base station, the method for eliminating DC leakage comprises the following steps: step A10: the traditional base station receives the indication content sent by the Internet of Things base station; and step A20: the traditional base station eliminates DC leakage according to the indication content.

[0117] For example, the indication content comprises at least one of the number of tones, the frequency domain position of the tones, and the transmission period.

[0118] For example, before the step of receiving the indication content sent by the Internet of Things base station, the method further comprises the following steps: receiving an indication carrier signal position request message sent by the Internet of Things base station; determining whether the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station according to the indication carrier signal position request message; if the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station, generating an indication carrier signal position request confirmation message containing preset content, and sending the indication carrier signal position request confirmation message to the Internet of Things base station, so that the Internet of Things base station indicates the indication content to the traditional base station through at least one field in the carrier position message according to the indication carrier signal position request confirmation message.

[0119] For example, the Internet of Things base station can determine different transmission modes of the CW signal according to different sending ends. In the embodiment of the present application, the transmission mode of the CW signal comprises downlink spectrum transmission and / or uplink spectrum transmission. In the case where the carrier signal is sent to the Internet of Things device by the Internet of Things base station and / or the carrier node, the transmission mode of the carrier signal is determined as downlink spectrum transmission. In the case where the carrier signal is sent to the Internet of Things device by the first user equipment, the transmission mode of the carrier signal is determined as uplink spectrum transmission.

[0120] For example, the objects affected by DC leakage are different under different transmission modes. Therefore, the corresponding indication objects are determined according to different transmission modes, so that the receiving end that may be affected by DC leakage can eliminate DC leakage in time.

[0121] For example, in the case where the transmission mode is uplink spectrum transmission, the Internet of Things base station determines the indication object as the traditional base station, that is, in the case where the CW signal is sent to the Internet of Things device from the first user equipment, the traditional base station is taken as the indication object.

[0122] Exemplarily, different transmission forms of the carrier signal determine that there are differences in the information required to eliminate the DC leakage, and therefore the indication content is determined according to the carrier signal, so that the indication object eliminates the DC leakage according to the indication content.

[0123] Exemplarily, in the case of periodic transmission of the carrier signal, the indication content determined by the Internet of Things base station includes the number of tones, the frequency domain position of the tones, and the transmission period; in the case of non-periodic transmission of the carrier signal, the indication content determined by the Internet of Things base station includes the number of tones and the frequency domain position of the tones.

[0124] Exemplarily, when the UE transmits the CW signal to the A-IoT device in the uplink spectrum, if the receiver of the conventional NR or LTE base station works in the same frequency band, the DC leakage will occur in the working bandwidth, thereby causing interference. In order to eliminate the DC influence, the A-IoT base station needs to transmit the frequency domain position (and the transmission period) of the CW signal to the conventional base station. First, the A-IoT base station transmits a request for indicating the position of the CW signal to the conventional base station; second, the conventional base station replies to the A-IoT base station whether the signaling for indicating the position of the CW signal needs to be transmitted; finally, the A-IoT base station indicates the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period (if the CW signal is periodically transmitted, the transmission period is indicated, otherwise it is not indicated) to the conventional base station after receiving the positive reply.

[0125] Referring to FIG. 10 in the foregoing embodiments, as shown in FIG. 10, the interaction process between the A-IoT base station and the conventional base station includes: first, the A-IoT base station transmits a CW Location Request message to transmit the current working frequency band to the conventional NR or LTE base station; second, after receiving the CW Location Request, the conventional base station judges whether the uplink frequency band currently worked by the base station overlaps with the uplink frequency band of the A-IoT base station, and transmits a CW Location Request Acknowledge message to the A-IoT base station, if there is an overlapping part in the frequency band, reply Yes, if there is no overlapping part, reply No; third, after receiving the CW Location Request Acknowledge message Yes, the A-IoT base station indicates the number of all tones of the CW signal (CWToneNum), the frequency domain position of each tone (CWCurrentLocation), and the transmission period (CWtrans-Timer) (if the CW signal is periodically transmitted, the transmission period is indicated, otherwise it is not indicated) to the conventional base station through the CW Location message, so that the conventional base station can eliminate the DC signal at the receiving end according to the indication information.

[0126] The embodiment eliminates the DC leakage according to the indication content, so that the traditional base station can eliminate the DC leakage according to the indication content, and reduce signal interference.

[0127] Seventh embodiment

[0128] Referring to FIG. 14, which is a flowchart of a method for eliminating DC leakage according to the seventh embodiment, the seventh embodiment of the present application is based on any of the above embodiments. In the seventh embodiment of the present application, the same or similar contents as those of any of the above embodiments can be referred to the above description, and will not be described hereinafter. On this basis, referring to FIG. 14, for the second user equipment (i.e. the traditional UE), the method for eliminating DC leakage comprises the following steps: B10, the second user equipment receives the indication content sent by the Internet of Things base station; B20, the second user equipment eliminates the DC leakage according to the indication content.

[0129] For example, the Internet of Things base station can determine different transmission modes of the CW signal according to different transmission ends. In the embodiment of the present application, the transmission modes of the CW signal include downlink spectrum transmission and / or uplink spectrum transmission. In the case where the carrier signal is transmitted to the Internet of Things device by the Internet of Things base station and / or the carrier node, the transmission mode of the carrier signal is determined as downlink spectrum transmission. In the case where the carrier signal is transmitted to the Internet of Things device by the first user equipment, the transmission mode of the carrier signal is determined as uplink spectrum transmission.

[0130] For example, the objects affected by the DC leakage in different transmission modes are different, so the corresponding indication objects are determined according to different transmission modes, so that the receiving end that may be affected by the DC leakage can eliminate the DC leakage in time.

[0131] For example, in the case of downlink spectrum transmission, the indication object is determined as the second user equipment (traditional UE), that is, in the case where the CW signal is transmitted to the Internet of Things device from the Internet of Things base station and / or the CW signal is transmitted to the Internet of Things device from the CW node, the second user equipment is taken as the indication object.

[0132] For example, different transmission forms of the carrier signal determine that the information required for eliminating the DC leakage is different, so the indication content is determined according to the carrier signal, so that the indication object can eliminate the DC leakage according to the indication content.

[0133] For example, in the case of periodic transmission of the carrier signal, the indication content includes the number of tones, the frequency domain position of the tone and the transmission period. In the case of non-periodic transmission of the carrier signal, the indication content includes the number of tones and the frequency domain position of the tone.

[0134] Exemplarily, when the indication object is the second user equipment, the indication can be made through at least one of radio resource control signaling, media access control element, and downlink control information, and the second user equipment eliminates the direct current leakage influence according to the subcarrier position of the CW signal, such as radio frequency direct current calibration and baseband DC elimination scheme.

[0135] Exemplarily, in the manner of sending the indication content to the second user equipment (legacy UE) by the Internet of Things base station through RRC signaling, when the CW signal is non-periodically sent, two fields are added to respectively indicate the number of all tones of the CW signal in the downlink spectrum transmission and the subcarrier position of each tone; when the CW signal is periodically sent, three fields are added to respectively indicate the number of all tones of the CW signal in the downlink spectrum transmission, the subcarrier position of each tone, and the transmission period.

[0136] Exemplarily, the indication content sent by the Internet of Things base station to the second user equipment (legacy UE) through MAC CE can indicate the position of the CW signal in the downlink spectrum transmission to the legacy UE by adding some fields in the existing MAC CE. If the CW signal is non-periodically sent, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is periodically sent, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period to the legacy UE.

[0137] Exemplarily, the indication content sent by the Internet of Things base station to the second user equipment (legacy UE) through MAC CE can also indicate the position of the CW signal in the downlink spectrum transmission to the legacy UE by adding a new CW command MAC CE. If the CW signal is non-periodically sent, the A-IoT base station needs to indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is periodically sent, the A-IoT base station needs to indicate the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period to the legacy UE.

[0138] Exemplarily, the indication content sent by the Internet of Things base station to the second user equipment (legacy UE) through DCI can indicate the position of the CW signal in the downlink spectrum transmission to the legacy UE by adding some fields in the existing DCI. If the CW signal is non-periodically sent, two fields are added in the DCI to respectively indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is periodically sent, three fields are added in the DCI to respectively indicate the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period to the legacy UE.

[0139] Exemplarily, the Internet of Things base station sends the indication content to the second user equipment (legacy UE) through the DCI, and can also send the indication content to the legacy UE through a new DCI added to indicate the position of the CW signal in the downlink spectrum transmission. If the CW signal is sent aperiodically, two fields are added in the DCI to respectively indicate the number of all tones of the CW signal and the frequency domain position of each tone to the legacy UE. If the CW signal is sent periodically, three fields are added in the DCI to respectively indicate the number of all tones of the CW signal, the frequency domain position of each tone, and the transmission period to the legacy UE.

[0140] The embodiment eliminates the DC leakage by the above scheme, specifically, the second user equipment receives the indication content sent by the Internet of Things base station and eliminates the DC leakage according to the indication content. The second user equipment receives at least one of the radio resource control signaling, the medium access control element, and the downlink control information, and determines the indication content according to at least one of the radio resource control signaling, the medium access control element, and the downlink control information, so that the second user equipment can eliminate the DC leakage according to the indication content, and reduce signal interference.

[0141] Eighth embodiment

[0142] Referring to FIG. 15, FIG. 15 is a structural schematic diagram of a DC leakage elimination apparatus provided by the embodiment of the application, which can be carried on a terminal device in the method embodiment. The DC leakage elimination apparatus shown in FIG. 15 can be used to perform part or all of the functions of the method embodiments described in the above embodiments. As shown in FIG. 15, the DC leakage elimination apparatus includes a determination module configured to determine an indication object based on a transmission mode of a carrier signal, and determine indication content based on the carrier signal; and an indication module configured to send the indication content to the indication object, so that the indication object eliminates the DC leakage according to the indication content.

[0143] Exemplarily, the transmission mode includes downlink spectrum transmission and / or uplink spectrum transmission, and the method further includes: determining that the transmission mode of the carrier signal is the downlink spectrum transmission in a case where the carrier signal is sent to an Internet of Things device by the Internet of Things base station and / or a carrier node; and determining that the transmission mode of the carrier signal is the uplink spectrum transmission in a case where the carrier signal is sent to the Internet of Things device by a first user equipment.

[0144] Exemplarily, the step of determining the indication object based on the transmission mode of the carrier signal includes: determining that the indication object is a second user equipment in a case where the transmission mode is the downlink spectrum transmission; and determining that the indication object is a legacy base station in a case where the transmission mode is the uplink spectrum transmission.

[0145] In an example, the determining the indication content based on the carrier signal comprises: identifying whether the carrier signal is periodically transmitted; in a case that the carrier signal is periodically transmitted, determining that the indication content comprises a number of tones, frequency domain locations of the tones, and a transmission period; in a case that the carrier signal is not periodically transmitted, determining that the indication content comprises the number of tones and the frequency domain locations of the tones.

[0146] In an example, the sending the indication content to the indication object comprises: sending the indication content to the second user equipment by a first indication manner; and / or sending the indication content to the legacy base station by a second indication manner.

[0147] In an example, the first indication manner comprises at least one of radio resource control signaling, a medium access control element, and downlink control information.

[0148] In an example, the sending the indication content to the second user equipment by the radio resource control signaling comprises: in a case that the carrier signal is not periodically transmitted, adding two fields in the radio resource control signaling, the two fields being used to indicate the number of tones and the frequency domain locations of the tones to the second user equipment; in a case that the carrier signal is periodically transmitted, adding three fields in the radio resource control signaling, the three fields being used to indicate the number of tones, the frequency domain locations of the tones, and a transmission period to the second user equipment.

[0149] In an example, the medium access control element comprises an existing medium access control element and / or a newly added medium access control element, and the sending the indication content to the second user equipment by the medium access control element comprises: adding at least one field in the existing medium access control element, the at least one field being used to indicate the indication content to the second user equipment; adding at least one field in the newly added medium access control element, the at least one field being used to indicate the indication content to the second user equipment.

[0150] In an example, the downlink control information comprises existing downlink control information and / or newly added downlink control information, and the sending the indication content to the second user equipment by the downlink control information comprises: adding at least one field in the existing downlink control information, the at least one field being used to indicate the indication content to the second user equipment; adding at least one field in the newly added downlink control information, the at least one field being used to indicate the indication content to the second user equipment.

[0151] The step of sending the indication content to the legacy base station by the second indication mode includes sending an indication carrier signal position request message to the legacy base station, so that the legacy base station generates and sends an indication carrier signal position request confirmation message according to the indication carrier signal position request message; and in the case that the indication carrier signal position request confirmation message includes preset content, indicating the indication content to the legacy base station by at least one field in a carrier position message.

[0152] The direct current leakage elimination device provided by the embodiments of the present application has similar implementation principles and beneficial effects to the technical solutions shown in the corresponding method embodiments described above, and thus will not be described in detail here.

[0153] In addition, the embodiments of the present application also provide a network device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the direct current leakage elimination method described above.

[0154] In addition, the embodiments of the present application also provide a storage medium, which is a computer-readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the direct current leakage elimination method described above.

[0155] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles, or systems that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles, or systems. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article, or system that includes the element.

[0156] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and necessary general hardware platforms, of course, they can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk) and includes a plurality of instructions for making a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present application.

[0157] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation made by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method of eliminating direct current leakage, wherein, The method is applied to an Internet of Things base station, and comprises: determining an indication object based on a transmission mode of a carrier signal, and determining indication content based on the carrier signal; sending the indication content to the indication object, so that the indication object eliminates direct current leakage according to the indication content.

2. The method for eliminating direct current leakage according to claim 1, wherein the transmission mode comprises downlink spectrum transmission and / or uplink spectrum transmission, and the method further comprises: in the case where the carrier signal is transmitted to an Internet of Things device by the Internet of Things base station and / or a carrier node, determining that the transmission mode of the carrier signal is downlink spectrum transmission; in the case where the carrier signal is transmitted to an Internet of Things device by a first user equipment, determining that the transmission mode of the carrier signal is uplink spectrum transmission.

3. The method of eliminating direct current leakage as claimed in claim 2, wherein, The step of determining the indication object based on the transmission mode of the carrier signal comprises: in the case where the transmission mode is downlink spectrum transmission, determining that the indication object is a second user equipment; in the case where the transmission mode is uplink spectrum transmission, determining that the indication object is a legacy base station.

4. The method of eliminating direct current leakage as claimed in claim 3, wherein, The step of determining the indication content based on the carrier signal comprises: identifying whether the carrier signal is periodic transmission; in the case where the carrier signal is periodic transmission, determining that the indication content comprises a number of tones, frequency domain positions of the tones, and a transmission period; in the case where the carrier signal is non-periodic transmission, determining that the indication content comprises a number of tones and frequency domain positions of the tones.

5. The method of eliminating direct current leakage as claimed in claim 4, wherein, The step of sending the indication content to the indication object comprises: sending the indication content to the second user equipment by a first indication mode; and / or, sending the indication content to the legacy base station by a second indication mode.

6. The method of eliminating direct current leakage as claimed in claim 5, wherein, The first indication mode comprises at least one of radio resource control signaling, a medium access control element, and downlink control information.

7. The method of eliminating direct current leakage as claimed in claim 6 wherein, The step of sending the indication content to the second user equipment by the radio resource control signaling comprises: in the case where the carrier signal is non-periodic transmission, adding two fields in the radio resource control signaling, the two fields being respectively used for indicating the number of tones and the frequency domain positions of the tones to the second user equipment; in the case where the carrier signal is periodic transmission, adding three fields in the radio resource control signaling, the three fields being respectively used for indicating the number of tones, the frequency domain positions of the tones, and the transmission period to the second user equipment.

8. The method of eliminating direct current leakage as claimed in claim 6 wherein, The medium access control element comprises an existing medium access control element and / or a newly added medium access control element, and the step of sending the indication content to the second user equipment by the medium access control element comprises: adding at least one field in the existing medium access control element, the at least one field being used for indicating the indication content to the second user equipment; adding at least one field in the newly added medium access control element, the at least one field being used for indicating the indication content to the second user equipment.

9. The method of eliminating direct current leakage as claimed in claim 6 wherein, The downlink control information comprises existing downlink control information and / or newly added downlink control information, and the step of sending the indication content to the second user equipment by the downlink control information comprises: adding at least one field in the existing downlink control information, the at least one field being used to indicate the indication content to the second user equipment; adding at least one field in the new downlink control information, the at least one field being used to indicate the indication content to the second user equipment.

10. The method of eliminating direct current leakage as claimed in claim 5 wherein, The step of sending the indication content to the legacy base station by the second indication mode comprises: sending an indication carrier signal position request message to the legacy base station, so that the legacy base station generates and sends an indication carrier signal position request confirmation message according to the indication carrier signal position request message; in the case that the indication carrier signal position request confirmation message comprises preset content, indicating the indication content to the legacy base station by at least one field in a carrier position message.

11. A method of eliminating direct current leakage, wherein, The method is applied to a legacy base station, comprising: receiving indication content sent by an Internet of Things base station; eliminating direct current leakage according to the indication content.

12. The method of eliminating direct current leakage as claimed in claim 11, wherein, The indication content comprises at least one of the number of tones, the frequency domain position of the tones, and the transmission period, and the step of receiving indication content sent by the Internet of Things base station further comprises: receiving an indication carrier signal position request message sent by the Internet of Things base station; judging whether the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station according to the indication carrier signal position request message; if the currently working uplink frequency band overlaps with the uplink frequency band of the Internet of Things base station, generating an indication carrier signal position request confirmation message comprising preset content, and sending the indication carrier signal position request confirmation message to the Internet of Things base station, so that the Internet of Things base station indicates the indication content to the legacy base station by at least one field in a carrier position message according to the indication carrier signal position request confirmation message.

13. A method of eliminating direct current leakage, wherein, The method is applied to a second user equipment, comprising: receiving indication content sent by an Internet of Things base station; eliminating direct current leakage according to the indication content.

14. A network device, wherein, The network device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the direct current leakage elimination method according to any one of claims 1 to 13.

15. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program, the computer program being executable by a processor to implement the steps of the direct current leakage elimination method according to any one of claims 1 to 13.

16. A computer program product, wherein, The computer program product comprises a computer program, the computer program being executable by a processor to implement the steps of the direct current leakage elimination method according to any one of claims 1 to 13.

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