CN112586056A

CN112586056A - Method for self-interference elimination, terminal equipment and network equipment

Info

Publication number: CN112586056A
Application number: CN201880096773.0A
Authority: CN
Inventors: 张治�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2021-03-30
Anticipated expiration: 2038-12-28
Also published as: CN112586056B; WO2020133145A1

Abstract

The embodiment of the application relates to a method for self-interference elimination, a terminal device and a network device. The method comprises the following steps: the terminal device sends time information to the network device, where the time information includes a first duration, where the first duration indicates that a starting time of a first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference. The method for self-interference elimination, the terminal device and the network device in the embodiment of the application can realize that the network device obtains the time difference between the uplink symbol and the downlink symbol which generate the self-interference, so that the terminal device can synchronize the uplink symbol and the downlink symbol, and the self-interference complexity is reduced.

Description

Method for self-interference elimination, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications, and in particular, to a method, a terminal device, and a network device for self-interference cancellation.

Background

The terminal may use a self-interference cancellation technique when there is self-interference between different New Radio (NR) carriers or between NR and Long Term Evolution (LTE) carriers. However, uplink and downlink signals on different carriers are not usually synchronized, for example, the base station configures a Timing Advanced (TA) value for the terminal device, so that the uplink signal in the terminal device is advanced in time by a certain amount compared with the downlink signal, and the non-synchronization of the uplink signal and the downlink signal brings practical difficulty for self-interference cancellation.

Disclosure of Invention

The embodiment of the application provides a method for self-interference elimination, a terminal device and a network device, which can realize that the network device obtains the time difference between an uplink symbol and a downlink symbol which generate self-interference, so that the terminal device can synchronize the uplink symbol and the downlink symbol, and the self-interference complexity is reduced.

In a first aspect, a method for self-interference cancellation is provided, including: the terminal device sends time information to the network device, where the time information includes a first duration, where the first duration indicates that a starting time of a first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference.

In a second aspect, a method for self-interference cancellation is provided, comprising: the network device receives time information sent by the terminal device, where the time information includes a first duration, where the first duration indicates that a starting time of a first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference.

In a third aspect, a terminal device is provided, configured to perform the method in the first aspect or each implementation manner thereof. Specifically, the terminal device includes a functional module for executing the method in the first aspect or each implementation manner thereof.

In a fourth aspect, a network device is provided for performing the method of the second aspect or its implementation manners. In particular, the network device comprises functional modules for performing the methods of the second aspect or its implementations described above.

In a fifth aspect, a terminal device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the first aspect or each implementation manner thereof.

In a sixth aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method of the second aspect or each implementation mode thereof.

In a seventh aspect, a chip is provided for implementing the method in any one of the first to second aspects or its implementation manners. Specifically, the chip includes: a processor configured to call and run the computer program from the memory, so that the device on which the chip is installed performs the method in any one of the first aspect to the second aspect or the implementation manners thereof.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a ninth aspect, there is provided a computer program product comprising computer program instructions to cause a computer to perform the method of any one of the first to second aspects or implementations thereof.

A tenth aspect provides a computer program that, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Through the technical scheme, the terminal equipment determines the time difference between the starting time of the uplink symbol and the starting time of the downlink symbol which generate self-interference, and sends the time difference to the network equipment, so that the network equipment can indicate the terminal equipment to adjust the starting position of the uplink symbol, and after adjustment, the starting time or the ending time of the uplink symbol and the starting time of the downlink symbol are overlapped as much as possible, so that the time synchronization effect is achieved.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a TA value provided in an embodiment of the present application.

Fig. 3 is a schematic diagram of a time difference between an uplink symbol and a downlink symbol according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a method for self-interference cancellation according to an embodiment of the present application.

Fig. 5 is a schematic diagram of positions of an adjusted uplink symbol and an adjusted downlink symbol in a time domain according to an embodiment of the present application.

Fig. 6 is another schematic diagram of positions of an adjusted uplink symbol and an adjusted downlink symbol in a time domain according to an embodiment of the present application.

Fig. 7 is another schematic flow chart of a method for self-interference cancellation according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 9 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a chip provided in an embodiment of the present application.

Fig. 12 is a schematic diagram of a communication system provided in an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Self-interference signals in a terminal device can be roughly classified into the following three categories according to their sources.

The first type of self-interference signal may be a harmonic or intermodulation interference generated by one or several transmit signals of the communication system. For example, it may be a harmonic or intermodulation interference generated by one or several transmission signals of the cellular communication system.

The second type of self-interference signal is derived from interference between different wireless communication modules inside the handset, for example, interference between a WiFi signal and a cellular signal.

The third type of self-interference signal originates mainly from electromagnetic waves generated by some active electronic devices inside the terminal. For example, a display screen of the terminal device, a memory reading operation of the terminal device, a camera of the terminal device, an electromagnetic wave generated by an electric motor, and the like. The frequency range of the electromagnetic wave can be dozens of MHz to hundreds of MHz, and when the harmonic wave falls on the cellular frequency band or the harmonic wave and the transmitting signal of the cellular frequency band are mutually modulated, the electromagnetic wave can generate interference on the reception of the cellular frequency band.

It should be understood that the self-interference type of the terminal device is not specifically limited in this embodiment of the application. That is to say, when performing self-interference cancellation, the terminal device in this embodiment may perform cancellation on at least one of the first self-interference signal, the second self-interference signal, and the third self-interference signal.

Specifically, a first type of self-interference signal is taken as an example. When the terminal device operates on two or more carriers in different frequency bands at the same time, uplink signals of the carriers may interfere with downlink received signals of some carriers. Assuming that carrier F1 operates at a low frequency band and carrier F2 operates at a high frequency band, there may be three different types of mutual interference.

First, the frequency of an Inter Modulation (IM) of an uplink carrier of F1 and an uplink carrier of F2 overlaps or partially overlaps with the frequency of a downlink signal of a carrier F3, so that the carriers F1 and F2 interfere with F3. Here, F3 may be one of the carriers F1 or F2, or another carrier different from F1 and F2 (in which case the terminal may operate on more than two carriers simultaneously).

An example is a UE configured with both LTE and NR carriers of Band 1 and Band 7 (3400-.

Second, the frequency multiplication of the upstream carrier of F1 overlaps or partially overlaps the frequency of the downstream signal of F2, and the carrier F1 constitutes harmonic (harmonic) interference with F2. For example: the uplink carrier range of the LTE Band 3 is 1710-1785MHz, and the 2 nd harmonic range thereof is 3420-3570 MHz. Then a terminal device may interfere with the sensitivity of the NR DL receiver by the order 2 harmonic if it is transmitting LTE uplink on band 3 and DL receiving on NR 3400 + 3800MHz at the same time.

Third, the frequency multiplication of the downstream carrier of F1 overlaps or partially overlaps the upstream signal frequency of F2 (and its neighboring frequencies), and thus carrier F2 constitutes harmonic intermodulation (harmonic mixing) interference to F1. For example: the downlink carrier range of the LTE Band 3 is 1805-1880MHz, and the 2 nd harmonic range thereof is 3610-3760 MHz. Then if a terminal device performs LTE downlink reception on band 3 and uplink transmission on NR 3400 and 3800MHz at the same time, the NR 2 order harmonic intermodulation may interfere with the sensitivity of the LTE DL receiver.

Since the interference is generated inside the terminal device, if the terminal device can eliminate the self-interference, the performance of the terminal and the system can be greatly improved.

The basic principle of self-interference elimination at the terminal equipment side is as follows: coupling or sampling a part of the transmitted signal to be used as a reference signal, applying corresponding gain, time delay and phase adjustment to the reference signal, constructing a cancellation signal with the same power and the opposite phase as the actual self-interference signal, and finally realizing the destructive interference cancellation of the self-interference signal at a receiving end. The above process essentially implements a model for self-interference reconstruction within the terminal device.

The self-interference cancellation technology on the terminal device side can be divided into digital and analog. For the analog self-interference elimination technology, a radio frequency signal transmitted by a terminal side is directly sampled, an interference signal is reconstructed through the sampled signal, and then the interference signal is eliminated at a radio frequency front end. For digital self-interference cancellation techniques, the transmit signal is sampled by the baseband signal, the interference signal is reconstructed at baseband and then cancelled at baseband. Regardless of which technique is employed, it relies on canceling the actual interference signal by sampling the transmitted signal and then reconstructing it in some way.

For LTE or NR signals, the uplink signal is usually advanced in time relative to the downlink signal, as shown in fig. 2. Specifically, in order to enable signals transmitted by different terminal devices to reach the network device at almost the same time, the network device configures a TA value for the different terminal devices, where the TA value indicates an advance time length of an uplink signal relative to a downlink signal. For example, for an LTE system, the TA value may be determined by the following equation (1):

TA＝(N _TA+N _{TA offset})×T _s (1)

wherein, T_s＝1/(15000×2048)；N _TAThe method is characterized in that the time advance with Ts as a unit is configured by a network device as a terminal device; n is a radical of_{TA offset}The values are different in different systems, e.g. in a TDD system, N_{TA offset}614, while in FDD system, N_{TA offset}＝0。

But due to the introduction of TA, the transmitted and received signals are not synchronized in time at the terminal equipment side. For example, as shown in fig. 2, the uplink and downlink signals are different in time. In practice, this difference exists between the uplink and downlink signals between different frequency bands.

At the terminal equipment side, due to the introduction of TA shown in fig. 2, the uplink and downlink time is not synchronized, so that one downlink symbol (symbol) overlaps two uplink symbols. From the self-interference perspective, it is a downlink symbol to be interfered by two uplink symbols in time sequence. For example, as shown in fig. 3, the downlink symbol i is interfered by uplink symbols j and j + 1. For an analog or digital self-interference cancellation algorithm, in order to cancel interference suffered by one downlink symbol i, two uplink interference symbols, i.e., uplink symbols j and j +1, are sampled before and after, and then 2 interference signals are reconstructed. The complexity of self-interference cancellation is greatly increased. Therefore, it is necessary to adopt a proper method to adjust the time difference between the uplink and downlink symbols to simplify the complexity of the self-interference cancellation algorithm.

Therefore, the method for self-interference cancellation provided by the embodiment of the present application may be used for synchronizing an uplink symbol and a downlink symbol by a terminal device, thereby simplifying the complexity of a self-interference cancellation algorithm.

Fig. 4 shows a schematic flow diagram of a method 200 for self-interference cancellation according to an embodiment of the present application, which method 200 may be performed by a terminal device, e.g. any one of the terminal devices shown in fig. 1. Specifically, an uplink signal carried by a first uplink symbol and a downlink signal carried by a first downlink symbol of the terminal device may generate self-interference, where the first uplink symbol may be any uplink symbol, and the first downlink symbol may also be any downlink symbol. As shown in fig. 4, the method 200 includes: s210, the terminal device sends time information to the network device, where the time information includes a first duration, and the first duration indicates that the starting time of the first uplink symbol is earlier than the starting time of the first downlink symbol by the first duration.

It should be understood that the duration of the uplink symbol in the embodiment of the present application is equal to the duration of the downlink symbol, and the durations of the multiple uplink symbols are also equal, and the durations of the multiple downlink symbols are also equal. For example, in the embodiment of the present application, as shown in fig. 3, the duration of each uplink symbol and downlink symbol is denoted as T.

In this embodiment of the present application, since the network device configures a TA value for the terminal device, the uplink signal and the downlink signal are not synchronized, and for an uplink symbol and a downlink symbol that may generate self-interference, a time difference may exist between starting times of the uplink symbol and the downlink symbol, and the terminal device may send time information to the network device, where the time information is used to indicate the time difference.

In this embodiment of the present application, the terminal device determines one uplink symbol and one downlink symbol, that is, a first uplink symbol and a first downlink symbol, which generate self-interference, where the first uplink symbol may be any one uplink symbol, and the corresponding downlink symbol is a downlink symbol that generates self-interference with the first uplink symbol.

In S210, the time information sent by the terminal device to the network device includes a first duration, where the first duration refers to that a starting time of a first uplink symbol is earlier than a starting time of the first downlink symbol by a first duration, and therefore, for selecting any one uplink symbol as the first uplink symbol, if the first uplink symbol corresponds to two downlink symbols and generates self-interference, a downlink symbol with a starting time later than the first uplink symbol is selected as the first downlink symbol.

As shown in fig. 3, it is assumed that the first uplink symbol is selected as the uplink symbol j +1 in fig. 3, and correspondingly, the downlink symbols i and i +1 in fig. 3 and the uplink symbol j +1 both generate self-interference, and here, the downlink symbol with the start time later than the uplink symbol j +1 is selected as the first downlink symbol, that is, the downlink symbol i +1 is the first downlink symbol with bit. Or, if the first uplink symbol is selected as the uplink symbol j in fig. 3, the corresponding first downlink symbol is the downlink symbol i in fig. 3; if the first uplink symbol is selected as the uplink symbol j +2 in fig. 3, the corresponding first downlink symbol is the downlink symbol i +2 in fig. 3.

For convenience of explanation, the uplink symbol j in fig. 3 is taken as the first uplink symbol, and the downlink symbol i is taken as the first downlink symbol, and the difference T between the start times of the two symbols is described as an example₁I.e. the first duration.

It should be understood that the first time duration in the embodiment of the present application is less than or equal to the time duration T of the uplink symbol or the downlink symbol.

Optionally, the time information sent by the terminal device to the network device may further include first position sub-information and/or second position sub-information, where the first position sub-information indicates a position of the first uplink symbol in the time domain, and the second position sub-information indicates a position of the first downlink symbol in the time domain.

Specifically, the terminal device may determine a number of a timeslot where the first uplink symbol is located, and a position or a number of the first uplink symbol in the timeslot, where the timeslot is referred to as an uplink timeslot, and the first position sub-information may include the number of the uplink timeslot where the first uplink symbol is located and/or the number of the first uplink symbol in the uplink timeslot. Similarly, the terminal device may also correspondingly determine a number of a timeslot where the first downlink symbol is located, and a position or a number of the first downlink symbol in the timeslot, where the timeslot is referred to as a downlink timeslot, and the second position sub-information may include the number of the downlink timeslot where the first downlink symbol is located and/or the number of the first downlink symbol in the downlink timeslot, which is not limited in this embodiment of the present application.

In this embodiment of the application, after the terminal device sends the time information to the network device, the method 200 may further include: the terminal device receives indication information sent by the network device, where the indication information is used to indicate the terminal device to adjust a starting time for sending the first uplink symbol.

It should be understood that the indication information may be used to indicate an adjustment duration, so that the terminal device adjusts the starting time of the first uplink symbol according to the adjustment duration, that is, advances or delays the starting time of the first uplink symbol; or, the indication information may also be used to indicate a TA value, where the TA value is an updated TA value configured by the network device for the terminal device, and the start time of the first uplink symbol is adjusted by adjusting the TA value.

Optionally, as an embodiment, the indication information may be used to indicate an adjustment duration, where the adjustment duration is smaller than the duration of the first uplink symbol. Specifically, the network device obtains a first duration sent by the terminal device; determining an adjusting time length according to the first time length, wherein the adjusting time length is less than or equal to the first time length; and the terminal equipment acquires the adjustment time length and adjusts the starting moment of the sending of the first uplink symbol according to the adjustment time length.

Specifically, the terminal device may delay the starting time of the first uplink symbol according to the adjustment duration, that is, delay transmission of the first uplink symbol, so that after the delay transmission, a time difference between the starting time of the first uplink symbol and the starting time of the first downlink symbol is reduced. The terminal device determines the adjustment duration, and may also determine to delay sending the first uplink symbol by itself, or the network device instructs the terminal device to delay sending the first uplink symbol by the sent indication information.

For example, as shown in FIGS. 3 and 5, the first stepAn uplink symbol is an uplink symbol j, a first downlink symbol is a downlink symbol i, and before adjustment, that is, in fig. 3, a difference between a start time of the uplink symbol j and a start time of the downlink symbol i is a first duration; assuming that the adjustment duration is equal to the first duration T₁That is, the time length for the terminal device to delay sending the uplink symbol j is equal to the first time length T₁Then after the transmission is delayed, i.e. as shown in fig. 5, there is no time difference between the start time of the uplink symbol j and the start time of the downlink symbol i, i.e. the uplink symbol j is aligned with the downlink symbol i. Thus, when self-interference cancellation is performed, the downlink symbol i is only interfered by the uplink symbol j. For an analog or digital self-interference cancellation algorithm, in order to cancel interference suffered by one downlink symbol i, only the uplink symbol j needs to be sampled, and the complexity of self-interference cancellation is reduced.

It should be understood that the terminal device may adjust the starting time of the first uplink symbol by adjusting the starting time of the timeslot where the first uplink symbol is located. Specifically, if the network device configures a TA value for the terminal device, where the TA value is a difference between a starting time of a timeslot where the first uplink symbol is located and a starting time of a timeslot where the second uplink symbol is located, that is, the TA value causes a time difference of a first duration between the starting time of the first uplink symbol and the starting time of the first downlink symbol, the terminal device may use a value TA 'obtained by subtracting an adjustment duration Δ from the TA value as an adjusted TA value, and send the timeslot where the first uplink symbol is located according to the adjusted TA value TA', so that a duration after which the starting time of the adjusted first uplink symbol is delayed is equal to the adjustment duration Δ.

Optionally, the terminal device may further advance the starting time of the first uplink symbol according to the adjustment duration, that is, send the first uplink symbol in advance, so that after sending in advance, the time difference between the ending time of the first uplink symbol and the starting time of the first downlink symbol is reduced, that is, the time difference between the starting time of the next uplink symbol adjacent to the first uplink symbol and the starting time of the first downlink symbol is reduced. The terminal device determines the adjustment duration, and may also determine to send the first uplink symbol in advance, or the network device instructs the terminal device to send the first uplink symbol in advance through the sent indication information.

For example, as shown in fig. 3 and 6, the first uplink symbol is an uplink symbol j, the first downlink symbol is a downlink symbol i, and before the adjustment, that is, in fig. 3, a difference between a start time of the uplink symbol j and a start time of the downlink symbol i is a first duration; assuming that the adjustment duration is equal to the first duration, and the terminal device sends the uplink symbol j in advance, the duration sent in advance is equal to the duration T of the first uplink symbol and the first duration T₁After the transmission is advanced, i.e. as shown in fig. 6, there is no time difference between the ending time of the uplink symbol j and the starting time of the downlink symbol i, i.e. the starting time of the uplink symbol j +1 is aligned with the starting time of the downlink symbol i. Thus, when self-interference cancellation is performed, the downlink symbol i is interfered only by the uplink symbol j + 1. For an analog or digital self-interference cancellation algorithm, in order to cancel the interference suffered by one downlink symbol i, only the uplink symbol j +1 needs to be sampled, thereby reducing the complexity of self-interference cancellation.

Similarly, the terminal device may also adjust the starting time of the first uplink symbol by adjusting the starting time of the timeslot where the first uplink symbol is located. Specifically, if the network device configures a TA value for the terminal device, where the TA value is a difference between a starting time of a timeslot where the first uplink symbol is located and a starting time of a timeslot where the second uplink symbol is located, that is, the TA value causes a time difference of a first time length between the starting time of the first uplink symbol and the starting time of the first downlink symbol, the terminal device may use a value TA ' obtained by adding the TA value to the uplink symbol time length T and subtracting the adjustment time length Δ as an adjusted TA value, that is, TA ' ═ TA + T- Δ shown in fig. 6, and delay the timeslot where the first uplink symbol is located according to the adjusted TA value TA ', so that a time length before the adjusted starting time of the first uplink symbol is equal to a difference between the uplink symbol time length T and the adjustment time length Δ.

The above embodiments of fig. 5 and fig. 6 are described by taking the adjustment duration being equal to the first duration as an example, but since the adjustment of the uplink TA involves uplink synchronization, which often involves multiple uplink terminal devices and sometimes involves uplink synchronization processes of multiple cells, the network device may not be able to agree to perform the adjustment according to the size of the first duration reported by the terminal device. Therefore, the network device may set the adjustment duration to be slightly smaller than the first duration, so that the adjustment duration is as small as possible different from the first duration.

Specifically, if the adjustment duration is equal to the first duration, the network device may send the indication information to the terminal device, where the indication information includes the first duration, or may also indicate the terminal device to send the uplink symbol in advance or in a delayed manner; or, the indication information may not include the first duration, that is, the indication information is only used to indicate the terminal device to send the uplink symbol in advance or in a delayed manner, and at this time, the indication information indicates that the adjustment duration is equal to the first duration. If the adjustment duration is less than the first duration, the indication information sent by the network device to the terminal device includes the adjustment duration, or may also include an indication that the terminal device sends the uplink symbol in advance or in a delayed manner.

Optionally, as an embodiment, the indication information may further be used to indicate a TA value, where the TA value is determined by the network device according to the first time length. Specifically, the terminal device obtains a TA value configured by the network device, determines a first duration between a first uplink symbol and a first downlink symbol according to the TA value, and sends the first duration to the network device, and the network device updates the TA value according to the first duration; the terminal device receives indication information sent by the network device, acquires an updated TA value according to the indication information, and sends the first uplink symbol according to the updated TA value, or in other words, sends a timeslot where the first uplink symbol is located according to the updated TA value.

Specifically, in order to distinguish the two TA values, the other TA value used by the terminal device to determine the first duration is referred to as an original TA value; and the TA value indicated by the indication information sent by the network equipment is called an updated TA value, and the updated TA value is determined by the network equipment according to the first time length.

Optionally, the network device may increase or decrease the original TA value according to the first duration, and further determine the updated TA value.

An embodiment is similar to the embodiment corresponding to fig. 5, and the network device may reduce the size of the original TA value, that is, the updated TA value is smaller than the original TA value, and the updated TA value TA 'satisfies TA' ═ TA- Δ, where TA denotes the original TA value, Δ denotes an adjustment duration related to the first duration, and the adjustment duration is smaller than the duration T of the first uplink symbol. And if the adjustment time length is equal to the first time length, the terminal equipment adjusts according to the updated TA value, and the initial time of the adjusted first uplink symbol is coincided with the initial time of the first downlink symbol.

For example, as shown in fig. 3 and 5, the first uplink symbol is an uplink symbol j, the first downlink symbol is a downlink symbol i, and before the adjustment, that is, in fig. 3, according to the original TA value, the terminal device may determine that a difference between the start time of the uplink symbol j and the start time of the downlink symbol i is a first duration; assuming that the adjustment duration is equal to the first duration T₁And the updated TA value is smaller than the original TA value, after the terminal device adjusts according to the updated TA value, as shown in fig. 5, there is no time difference between the starting time of the uplink symbol j and the starting time of the downlink symbol i, that is, the uplink symbol j is aligned with the downlink symbol i. Thus, when self-interference cancellation is performed, the downlink symbol i is only interfered by the uplink symbol j. For an analog or digital self-interference cancellation algorithm, in order to cancel interference suffered by one downlink symbol i, only the uplink symbol j needs to be sampled, and the complexity of self-interference cancellation is reduced.

Another embodiment is similar to the embodiment corresponding to fig. 6, the network device may increase the original TA value, that is, the updated TA value may be greater than the original TA value, and the updated TA value TA 'satisfies TA' ═ TA + T- Δ, where TA also represents the original TA value, Δ also represents an adjustment duration related to the first duration, and the adjustment duration is less than the duration T of the first uplink symbol. And if the adjusting time length is equal to the first time length, the terminal equipment adjusts according to the updated TA value, and the end time of the adjusted first uplink symbol is coincided with the start time of the first downlink symbol.

For example, as shown in fig. 3 and 6, the first uplink symbol is an uplink symbol j, the first downlink symbol is a downlink symbol i, and before the adjustment, that is, in fig. 3, a difference between a start time of the uplink symbol j and a start time of the downlink symbol i is a first duration; assuming that the adjustment duration is equal to the first duration T₁And the updated TA value is greater than the original TA value, after the terminal device adjusts according to the updated TA value, as shown in fig. 6, there is no time difference between the ending time of the uplink symbol j and the starting time of the downlink symbol i, that is, the starting time of the uplink symbol j +1 is aligned with the starting time of the downlink symbol i. Thus, when self-interference cancellation is performed, the downlink symbol i is interfered only by the uplink symbol j + 1. For an analog or digital self-interference cancellation algorithm, in order to cancel the interference suffered by one downlink symbol i, only the uplink symbol j +1 needs to be sampled, thereby reducing the complexity of self-interference cancellation.

It should be understood that, in both the above embodiments, the adjustment duration may be equal to the first duration, but since the adjustment of the uplink TA involves uplink synchronization, which often involves multiple uplink terminal devices and sometimes involves uplink synchronization processes of multiple cells, the network device may not be able to agree to adjust the TA value according to the size of the first duration reported by the terminal device. Therefore, when determining the updated TA value, the network device may set the adjustment duration to be slightly smaller than the first duration, so that the adjustment duration is slightly different from the first duration as much as possible.

It should be understood that configuring, by the network device herein, a TA value (including any one of the original TA value or the updated TA value) for the terminal device may include: the network equipment directly configures a specific TA value for the terminal equipment; or it may also mean that the network device configures the terminal device with the relevant parameters for calculating the TA value, and the terminal device may calculate the TA value according to a formula. For example, the network device configures the terminal device with N in formula (1)_TAThe terminal device obtains the TA value according to formula (1), and the embodiment of the present application is not limited thereto.

In this embodiment of the present application, after the terminal device adjusts the starting time of the first uplink symbol, sampling and reconstructing an interference signal may be performed according to the positions of the adjusted first uplink symbol and the adjusted first downlink symbol, so as to perform self-interference cancellation.

Specifically, if the starting time of the first uplink symbol is delayed, and the delayed starting time of the first uplink symbol is substantially coincident with the starting time of the first downlink symbol, the terminal device samples the first uplink symbol; reconstructing an interference signal according to the sampling result; and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol.

For example, as shown in fig. 5, the first uplink symbol is an uplink symbol j, the first downlink symbol is a downlink symbol i, and the delay duration of the start time of the uplink symbol j is equal to the adjustment duration, so that the start time of the uplink symbol j and the start time of the downlink symbol i substantially coincide, when performing self-interference cancellation, the downlink symbol i is only interfered by the uplink symbol j. For an analog or digital self-interference cancellation algorithm, in order to cancel interference suffered by one downlink symbol i, only the uplink symbol j needs to be sampled, and the complexity of self-interference cancellation is reduced.

If the starting time of the first uplink symbol is advanced, and the ending time of the first uplink symbol after the advance is basically coincident with the starting time of the first downlink symbol, that is, the starting time of the next uplink symbol adjacent to the first uplink symbol is basically coincident with the starting time of the first downlink symbol, the terminal device samples the next uplink symbol of the first uplink symbol, where the next uplink symbol is an uplink symbol located after the first uplink symbol and adjacent to the first uplink symbol; reconstructing an interference signal according to the sampling result; and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol.

For example, as shown in fig. 6, the first uplink symbol is an uplink symbol j, the first downlink symbol is a downlink symbol i, the start time of the uplink symbol j is advanced by a time length equal to the difference between the first uplink symbol time length T and the adjustment time length, so that the end time of the uplink symbol j substantially coincides with the start time of the downlink symbol i, and the downlink symbol i is only interfered by the uplink symbol j +1 when performing self-interference cancellation. For an analog or digital self-interference cancellation algorithm, in order to cancel the interference suffered by one downlink symbol i, only the uplink symbol j +1 needs to be sampled, and the complexity of self-interference cancellation is also reduced.

Therefore, in the method for self-interference cancellation in the embodiment of the present application, the terminal device determines a time difference between starting times of an uplink symbol and a downlink symbol that generate self-interference, and sends the time difference to the network device, so that the network device instructs the terminal device to adjust a starting position of the uplink symbol, and after adjustment, the starting time or an ending time of the uplink symbol and the starting time of the downlink symbol coincide as much as possible, thereby achieving an effect of time synchronization.

The method for self-interference cancellation according to the embodiment of the present application is described in detail from the perspective of the terminal device in the foregoing with reference to fig. 1 to 6, and the method for self-interference cancellation according to the embodiment of the present application will be described from the perspective of the network device in the following with reference to fig. 7.

Fig. 7 shows a schematic flow diagram of a method 300 for self-interference cancellation according to an embodiment of the application, which method 300 may be performed by a network device, e.g., the network device shown in fig. 1. As shown in fig. 2, the method 300 includes: s310, a network device receives time information sent by the terminal device, where the time information includes a first time duration, where the first time duration indicates that a start time of a first uplink symbol is earlier than a start time of a first downlink symbol by the first time duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol may generate self-interference.

Optionally, as an embodiment, after the network device receives the time information sent by the terminal device, the method 300 further includes: the network device sends indication information to the terminal device, wherein the indication information is determined by the network device according to the first time length, and the indication information is used for indicating the terminal device to adjust the starting time for sending the first uplink symbol.

Optionally, as an embodiment, the first duration is smaller than a duration of the first uplink symbol.

Optionally, as an embodiment, the time information further includes: first position sub-information and/or second position sub-information, the first position sub-information indicating a position of the first uplink symbol in a time domain, the second position sub-information indicating a position of the first downlink symbol in the time domain.

Optionally, as an embodiment, the first position sub information includes a number of an uplink timeslot where the first uplink symbol is located and a number of the first uplink symbol in the uplink timeslot, and/or the second position sub information includes a number of a downlink timeslot where the first downlink symbol is located and a number of the first downlink symbol in the downlink timeslot.

Optionally, as an embodiment, the indication information is used to indicate an adjustment duration, where the adjustment duration is smaller than a duration of the first uplink symbol.

Optionally, as an embodiment, the adjustment duration is less than or equal to the first duration.

Optionally, as an embodiment, the indication information is used to indicate a timing advance TA value.

It should be understood that the network device in the method 300 is equivalent to the network device in the method 200, and may perform the corresponding steps and flows; the terminal device in the method 300 is equivalent to the terminal device in the method 200, and corresponding steps and procedures may be executed, which are not described herein again for brevity.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The method for self-interference cancellation according to the embodiment of the present application is described in detail above with reference to fig. 1 to 7, and a terminal device and a network device according to the embodiment of the present application are described below with reference to fig. 8 to 12.

As shown in fig. 8, a terminal device 400 according to an embodiment of the present application includes: a processing unit 410 and a transceiving unit 420, specifically, the transceiving unit 420 is configured to: and sending time information to the network equipment, wherein the time information comprises a first time length, the first time length represents that the starting time of a first uplink symbol is earlier than the starting time of a first downlink symbol by the first time length, and the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol generate self-interference.

Optionally, as an embodiment, the processing unit 410 may be configured to: the time information is generated.

Optionally, as an embodiment, the transceiving unit 420 is further configured to: after sending time information to a network device, receiving indication information sent by the network device, where the indication information is used to indicate the terminal device to adjust a starting time for sending the first uplink symbol.

Optionally, as an embodiment, the first duration is shorter than a duration of the first uplink symbol.

Optionally, as an embodiment, the transceiving unit 420 is further configured to: and delaying to send the first uplink symbol, wherein the delay time length of the starting time of the first uplink symbol is equal to the adjustment time length.

Optionally, as an embodiment, the transceiving unit 420 is further configured to: and sending the first uplink symbol in advance, wherein the advanced time length of the first uplink symbol is equal to the difference between the time length of the first uplink symbol and the adjustment time length.

Optionally, as an embodiment, the indication information is used to indicate a timing advance TA value, where the TA value is determined by the network device according to the first time length.

Optionally, as an embodiment, the processing unit 410 is configured to: and adjusting the starting time of the time slot for transmitting the first uplink symbol according to the TA value.

Optionally, as an embodiment, after adjusting the starting time of the timeslot where the first uplink symbol is sent, the starting time of the first uplink symbol is delayed, and a duration of the delay is equal to the first duration.

Optionally, as an embodiment, after adjusting the starting time of the timeslot where the first uplink symbol is sent, the starting time of the first uplink symbol is advanced by a time length equal to a difference between the time length of the first uplink symbol and the first time length.

Optionally, as an embodiment, the processing unit 410 is configured to: sampling the first uplink symbol; reconstructing an interference signal according to the sampling result; and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol.

Optionally, as an embodiment, the processing unit 410 is configured to: sampling a next uplink symbol of the first uplink symbol, wherein the next uplink symbol is an uplink symbol which is positioned behind the first uplink symbol and is adjacent to the first uplink symbol; reconstructing an interference signal according to the sampling result; and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to performing the method 200 in the embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 400 are respectively for implementing corresponding flows of the terminal device in each method in fig. 1 to fig. 7, and are not described herein again for brevity.

Therefore, the terminal device of the embodiment of the present application determines the time difference between the start time of the uplink symbol and the start time of the downlink symbol, which generate the self-interference, and sends the time difference to the network device, so that the network device indicates the terminal device to adjust the start position of the uplink symbol, and after the adjustment, the start time or the end time of the uplink symbol and the start time of the downlink symbol are overlapped as much as possible, thereby achieving the effect of time synchronization.

As shown in fig. 9, a network device 500 according to an embodiment of the present application includes: a processing unit 510 and a transceiver unit 520, specifically, the transceiver unit 520 is configured to: receiving time information sent by the terminal device, where the time information includes a first duration, where the first duration indicates that a starting time of the first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference.

Optionally, as an embodiment, the transceiver unit 520 is further configured to: after receiving the time information sent by the terminal device, sending indication information to the terminal device, where the indication information is determined by the network device according to the first time length, and the indication information is used to indicate the terminal device to adjust a starting time for sending the first uplink symbol.

Optionally, as an embodiment, the processing unit 510 is further configured to: the indication information is generated.

It should be understood that the network device 500 according to the embodiment of the present application may correspond to performing the method 300 in the embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 500 are respectively for implementing corresponding flows of the network devices in the methods in fig. 1 to fig. 7, and are not described herein again for brevity.

Therefore, the network device according to the embodiment of the present application receives the time difference between the starting times of the uplink symbol and the downlink symbol, which are sent by the terminal device and generate the self-interference, and instructs the terminal device to adjust the starting position of the uplink symbol, so that after the adjustment, the starting time or the ending time of the uplink symbol and the starting time of the downlink symbol coincide as much as possible, thereby achieving the effect of time synchronization.

Fig. 10 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in fig. 10 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 10, the communication device 600 may further include a memory 620. From the memory 620, the processor 610 may call and run a computer program to implement the method in the embodiment of the present application.

The memory 620 may be a separate device from the processor 610, or may be integrated into the processor 610.

Optionally, as shown in fig. 10, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 630 may include a transmitter and a receiver, among others. The transceiver 630 may further include one or more antennas.

Optionally, the communication device 600 may specifically be a network device in the embodiment of the present application, and the communication device 600 may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the communication device 600 may specifically be a mobile terminal/terminal device in this embodiment, and the communication device 600 may implement a corresponding process implemented by the mobile terminal/terminal device in each method in this embodiment, which is not described herein again for brevity.

Fig. 11 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in fig. 11 includes a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 11, the chip 700 may further include a memory 720. From the memory 720, the processor 710 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 720 may be a separate device from the processor 710, or may be integrated into the processor 710.

Optionally, the chip 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the chip may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, and for brevity, no further description is given here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 12 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. As shown in fig. 12, the communication system 800 includes a terminal device 810 and a network device 820.

The terminal device 810 may be configured to implement the corresponding function implemented by the terminal device in the foregoing method, and the network device 820 may be configured to implement the corresponding function implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for self-interference cancellation, wherein an uplink signal carried by a first uplink symbol and a downlink signal carried by a first downlink symbol generate the self-interference, the method comprising:

the terminal equipment sends time information to the network equipment, the time information comprises a first duration,

wherein the first duration indicates that the start time of the first uplink symbol is earlier than the start time of the first downlink symbol by the first duration.
The method of claim 1, wherein after the terminal device sends time information to a network device, the method further comprises:

and the terminal equipment receives indication information sent by the network equipment, wherein the indication information is used for indicating the terminal equipment to adjust the starting time for sending the first uplink symbol.
The method according to claim 1 or 2, wherein the first time duration is smaller than the time duration of the first uplink symbol.
The method according to any one of claims 1 to 3, wherein the time information further comprises: first position sub-information and/or second position sub-information, wherein the first position sub-information represents a position of the first uplink symbol in a time domain, and the second position sub-information represents a position of the first downlink symbol in the time domain.
The method according to claim 4, wherein the first position sub-information comprises the number of the uplink slot in which the first uplink symbol is located and the number of the first uplink symbol in the uplink slot, and/or,

the second position sub-information includes the number of the downlink timeslot where the first downlink symbol is located and the number of the first downlink symbol in the downlink timeslot.
The method according to any of claims 2 to 5, wherein the indication information is used to indicate an adjustment duration, and the adjustment duration is smaller than the duration of the first uplink symbol.
The method of claim 6, wherein the adjustment duration is less than or equal to the first duration.
The method according to claim 6 or 7, characterized in that the method further comprises:

and the terminal equipment delays to send the first uplink symbol, wherein the delay time of the starting time of the first uplink symbol is equal to the adjustment time.
The method according to claim 6 or 7, characterized in that the method further comprises:

and the terminal equipment sends the first uplink symbol in advance, wherein the advance time length of the first uplink symbol is equal to the difference between the time length of the first uplink symbol and the adjustment time length.
The method according to any of claims 2 to 5, wherein the indication information is used to indicate a Timing Advance (TA) value, and wherein the TA value is determined by the network device according to the first time length.
The method of claim 10, further comprising:

and the terminal equipment adjusts the starting time of the time slot in which the first uplink symbol is sent according to the TA value.
The method of claim 11, wherein after adjusting a starting time of a slot in which the first uplink symbol is transmitted, the starting time of the first uplink symbol is delayed by a time length equal to the first time length.
The method of claim 11, wherein after adjusting a start time of a timeslot in which the first uplink symbol is transmitted, the start time of the first uplink symbol is advanced by a duration equal to a difference between the duration of the first uplink symbol and the first duration.
The method according to claim 8 or 12, characterized in that the method further comprises:

the terminal equipment samples the first uplink symbol;

the terminal equipment reconstructs an interference signal according to the sampling result;

and the terminal equipment performs self-interference elimination on the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol according to the reconstructed interference signal.
The method according to claim 9 or 13, characterized in that the method further comprises:

the terminal equipment samples a next uplink symbol of the first uplink symbol, wherein the next uplink symbol is an uplink symbol which is located behind the first uplink symbol and is adjacent to the first uplink symbol;

the terminal equipment reconstructs an interference signal according to the sampling result;

and the terminal equipment carries out self-interference elimination on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol according to the reconstructed interference signal.
A method for self-interference cancellation in a terminal device, wherein an uplink signal carried by a first uplink symbol and a downlink signal carried by a first downlink symbol generate the self-interference, the method comprising:

the network equipment receives time information sent by the terminal equipment, wherein the time information comprises a first duration,

wherein the first duration indicates that the start time of the first uplink symbol is earlier than the start time of the first downlink symbol by the first duration.
The method of claim 16, wherein after the network device receives the time information sent by the terminal device, the method further comprises:

and the network equipment sends indication information to the terminal equipment, wherein the indication information is determined by the network equipment according to the first time length, and the indication information is used for indicating the terminal equipment to adjust the starting time for sending the first uplink symbol.
The method of claim 16 or 17, wherein the first time duration is less than a time duration of the first uplink symbol.
The method according to any one of claims 16 to 18, wherein the time information further comprises: first position sub-information and/or second position sub-information, wherein the first position sub-information represents a position of the first uplink symbol in a time domain, and the second position sub-information represents a position of the first downlink symbol in the time domain.
The method according to claim 19, wherein the first position sub-information comprises the number of the uplink slot in which the first uplink symbol is located and the number of the first uplink symbol in the uplink slot, and/or,

the second position sub-information includes the number of the downlink timeslot where the first downlink symbol is located and the number of the first downlink symbol in the downlink timeslot.
The method according to any of claims 17 to 20, wherein the indication information is used to indicate an adjustment duration, and the adjustment duration is smaller than a duration of the first uplink symbol.
The method of claim 21, wherein the adjustment duration is less than or equal to the first duration.
The method according to any of claims 17 to 20, wherein the indication information is used to indicate a timing advance, TA, value.
A terminal device, comprising:

a transceiver unit, configured to send time information to a network device, where the time information includes a first duration, where the first duration indicates that a starting time of a first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference.
The terminal device of claim 24, wherein the transceiver unit is further configured to:

after sending time information to a network device, receiving indication information sent by the network device, where the indication information is used to indicate the terminal device to adjust a starting time for sending the first uplink symbol.
The terminal device according to claim 24 or 25, wherein the first time length is smaller than the time length of the first uplink symbol.
The terminal device according to any of claims 24 to 26, wherein the time information further comprises: first position sub-information and/or second position sub-information, wherein the first position sub-information represents a position of the first uplink symbol in a time domain, and the second position sub-information represents a position of the first downlink symbol in the time domain.
The terminal device according to claim 27, wherein the first position sub-information comprises a number of an uplink slot in which the first uplink symbol is located and a number of the first uplink symbol in the uplink slot, and/or,

the second position sub-information includes the number of the downlink timeslot where the first downlink symbol is located and the number of the first downlink symbol in the downlink timeslot.
The terminal device according to any one of claims 25 to 28, wherein the indication information is used to indicate an adjustment duration, and the adjustment duration is smaller than a duration of the first uplink symbol.
The terminal device of claim 29, wherein the adjustment duration is less than or equal to the first duration.
The terminal device according to claim 29 or 30, wherein the transceiver unit is further configured to:

and delaying to send the first uplink symbol, wherein the delay time length of the starting time of the first uplink symbol is equal to the adjustment time length.
The terminal device according to claim 29 or 30, wherein the transceiver unit is further configured to:

and sending the first uplink symbol in advance, wherein the advanced time length of the first uplink symbol is equal to the difference between the time length of the first uplink symbol and the adjustment time length.
The terminal device according to any of claims 25 to 28, wherein the indication information is used to indicate a timing advance, TA, value, which is determined by the network device according to the first time length.
The terminal device of claim 33, wherein the terminal device further comprises:

and the processing unit is used for adjusting the starting time of the time slot in which the first uplink symbol is sent according to the TA value.
The terminal device of claim 34, wherein after adjusting a starting time of a timeslot in which the first uplink symbol is transmitted, the starting time of the first uplink symbol is delayed, and a duration of the delay is equal to the first duration.
The terminal device of claim 34, wherein after adjusting a starting time of a timeslot in which the first uplink symbol is transmitted, the starting time of the first uplink symbol is advanced by a duration equal to a difference between a duration of the first uplink symbol and the first duration.
The terminal device according to claim 31 or 35, wherein the terminal device further comprises: a processing unit to:

sampling the first uplink symbol;

reconstructing an interference signal according to the sampling result;

and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol.
The terminal device according to claim 32 or 36, wherein the terminal device further comprises: a processing unit to:

sampling a next uplink symbol of the first uplink symbol, wherein the next uplink symbol is an uplink symbol which is located after the first uplink symbol and is adjacent to the first uplink symbol;

reconstructing an interference signal according to the sampling result;

and according to the reconstructed interference signal, performing self-interference cancellation on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol.
A network device, comprising:

a receiving and sending unit, configured to receive time information sent by the terminal device, where the time information includes a first duration, where the first duration indicates that a starting time of the first uplink symbol is earlier than a starting time of a first downlink symbol by the first duration, and an uplink signal carried by the first uplink symbol and a downlink signal carried by the first downlink symbol generate self-interference.
The network device of claim 39, wherein the transceiver unit is further configured to:

after receiving the time information sent by the terminal device, sending indication information to the terminal device, where the indication information is determined by the network device according to the first time length, and the indication information is used to indicate the terminal device to adjust a starting time for sending the first uplink symbol.
The network device of claim 39 or 40, wherein the first time duration is less than a time duration of the first uplink symbol.
The network device of any one of claims 39-41, wherein the time information further comprises: first position sub-information and/or second position sub-information, wherein the first position sub-information represents a position of the first uplink symbol in a time domain, and the second position sub-information represents a position of the first downlink symbol in the time domain.
The network device according to claim 42, wherein the first position sub-information comprises the number of the uplink slot in which the first uplink symbol is located and the number of the first uplink symbol in the uplink slot, and/or,

the second position sub-information includes the number of the downlink timeslot where the first downlink symbol is located and the number of the first downlink symbol in the downlink timeslot.
The network device according to any of claims 40 to 43, wherein the indication information is used to indicate an adjustment duration, and the adjustment duration is smaller than the duration of the first uplink symbol.
The network device of claim 44, wherein the adjustment duration is less than or equal to the first duration.
A network device as claimed in any of claims 40 to 43, wherein the indication information is used to indicate a timing advance, TA, value.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method for self-interference cancellation as claimed in any one of claims 1 to 15.
A network device, comprising: a processor and a memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory performing the method for self-interference cancellation as claimed in any one of claims 16 to 23.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method for self-interference cancellation as claimed in any one of claims 1 to 15.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method for self-interference cancellation as claimed in any one of claims 16 to 23.
A computer-readable storage medium for storing a computer program for causing a computer to perform the method for self-interference cancellation according to any one of claims 1 to 15.
A computer-readable storage medium for storing a computer program for causing a computer to perform the method for self-interference cancellation according to any one of claims 16 to 23.
A computer program product comprising computer program instructions to cause a computer to perform the method for self-interference cancellation according to any one of claims 1 to 15.
A computer program product comprising computer program instructions to cause a computer to perform the method for self-interference cancellation according to any one of claims 16 to 23.
A computer program, characterized in that the computer program causes a computer to perform the method for self-interference cancellation according to any of claims 1-15.
A computer program, characterized in that the computer program causes a computer to perform the method for self-interference cancellation according to any of claims 16-23.