CN111277300A - Information transmission method, terminal and network equipment - Google Patents

Information transmission method, terminal and network equipment Download PDF

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Publication number
CN111277300A
CN111277300A CN201811550208.5A CN201811550208A CN111277300A CN 111277300 A CN111277300 A CN 111277300A CN 201811550208 A CN201811550208 A CN 201811550208A CN 111277300 A CN111277300 A CN 111277300A
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signal
time
terminal
frequency resource
self
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CN111277300B (en
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姜大洁
沈晓冬
刘昊
冯三军
秦飞
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to PCT/CN2019/122637 priority patent/WO2020125400A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Abstract

The invention discloses an information transmission method, a terminal and network equipment, wherein the method comprises the following steps: transmitting a first signal on a first time-frequency resource; performing self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter; under the condition of self-interference, self-interference elimination is carried out on the received second signal according to the self-interference parameter; the second signal includes a downlink signal sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain. The terminal of the embodiment of the invention can estimate and train the self-interference elimination related parameters according to the first signal sent by the terminal, thereby reducing the self-interference influence and improving the performance of a downlink.

Description

Information transmission method, terminal and network equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information transmission method, a terminal, and a network device.
Background
In a mobile communication system, a terminal can tightly couple different systems through a Dual Connectivity (DC) manner. One system serves as a Master Node (MN), and the other system serves as a Secondary Node (SN). In a dual connectivity system, two Cell groups are included, namely, a Master Cell Group (MSG) and a Secondary Cell Group (SCG), wherein the Master Cell Group may include one Primary Cell (PCell) and at least one Secondary Cell (SCell), and the Secondary Cell Group may include one Primary Secondary Cell (PSCell) and at least one SCell.
As shown in fig. 1, assuming that one of the systems of the dual connection uses a 1.8GHz spectrum and the other system uses a 3.5GHz spectrum, when the terminal simultaneously transmits uplink at 1.8GHz and 3.5GHz, due to the non-ideality of the transmitting link device, the table of the calculation of the intermodulation interference and the second harmonic interference of the two systems of the dual connection is shown in table 1:
TABLE 1 relationship table of frequency points of intermodulation and second harmonic
Figure BDA0001910443160000011
As shown in the above table, the data unit in the table is MHz, and the downlink received signal of the terminal at 1.8GHz may be affected by intermodulation interference generated by uplink at 1.8GHz and 3.5 GHz; the second harmonic of the 1.8GHz uplink may affect the 3.5GHz downlink received signal. When the terminal transmitting power is large, the downlink receiving sensitivity fallback caused by intermodulation interference and second harmonic interference can reach the magnitude of 20dB, and the performance of a downlink is influenced.
In addition to the above LTE-NR dual connection scenario, terminal self-interference such as harmonic waves and cross-tones may be generated, other scenarios such as NR-NR dual connection, carrier aggregation, and Supplementary Uplink (SUL), coexistence of dual connection + SUL, WIFI and LTE, coexistence of WIFI and NR, and the like may also generate terminal self-interference, which includes various orders of harmonic waves, cross-tones, and harmonic mixtures, and the like, and may affect the performance of the middle-end downlink.
Disclosure of Invention
The embodiment of the invention provides an information transmission method, a terminal and network equipment, which aim to solve the self-interference problem of uplink signals of the terminal to downlink reception in a dual-connection system.
In a first aspect, an embodiment of the present invention provides an information transmission method, applied to a terminal side, including:
transmitting a first signal on a first time-frequency resource;
performing self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter;
under the condition of self-interference, self-interference elimination is carried out on the received second signal according to the self-interference parameter;
the second signal includes a downlink signal sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain.
In a second aspect, an embodiment of the present invention further provides a terminal, including:
a first transmitting module, configured to transmit a first signal on a first time-frequency resource;
the estimation module is used for performing self-interference estimation on self-interference generated by the first signal on the second time-frequency resource to obtain a self-interference parameter;
the processing module is used for performing self-interference elimination on the received second signal according to the self-interference parameter under the condition of self-interference;
the second signal includes a downlink signal sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain.
In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the computer program is executed by the processor, the steps of the information transmission method are implemented.
In a fourth aspect, an embodiment of the present invention provides an information transmission method, applied to a network device side, including:
sending configuration information of a first signal for self-interference estimation to a terminal; the configuration information is used for instructing the terminal to transmit a first signal on a first time-frequency resource.
In a fifth aspect, an embodiment of the present invention provides a network device, including:
a fifth sending module, configured to send configuration information of the first signal for self-interference estimation to the terminal; the configuration information is used for instructing the terminal to transmit a first signal on a first time-frequency resource.
In a sixth aspect, an embodiment of the present invention further provides a network device, where the network device includes a processor, a memory, and a computer program stored in the memory and running on the processor, and the processor implements the steps of the information transmission method when executing the computer program.
In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the information transmission method are implemented.
Therefore, the terminal of the embodiment of the invention can estimate and train the self-interference elimination related parameters according to the first signal sent by the terminal, further perform self-interference elimination on the received downlink signal, reduce the self-interference influence and improve the downlink performance.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 shows a block diagram of a mobile communication system to which an embodiment of the present invention is applicable;
fig. 2 is a schematic flow chart of an information transmission method at a terminal side according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a terminal according to an embodiment of the present invention;
FIG. 4 shows a block diagram of a terminal of an embodiment of the invention;
fig. 5 is a schematic block diagram of a network device according to an embodiment of the present invention;
FIG. 6 is a block diagram of a network device according to an embodiment of the present invention;
fig. 7 shows a block diagram of a network device of an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects, "at least part" means all or part.
The techniques described herein are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.
The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
The terminal in the embodiment of the present invention may also be referred to as a terminal Device or a User Equipment (UE), where the terminal may be a Mobile phone, a Tablet personal Computer (Tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and a specific type of the terminal is not limited in the embodiment of the present invention. The network device may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention, only the Base Station in the NR system is taken as an example, but does not limit the specific type of base station.
An embodiment of the present invention provides an information transmission method, which is applied to a terminal, and as shown in fig. 2, the method includes the following steps:
step 21: a first signal is transmitted on a first time-frequency resource.
The first time-frequency resource may be suggested by the terminal, configured or predefined (e.g., agreed by a protocol) by the network device, or the like. The first time frequency resource may be a periodic resource or an aperiodic resource. For example, based on a Resource Block (RB), wherein an RB includes 12 subcarriers, the 4 th subcarrier and the 8 th subcarrier thereof are set to 1, and the remaining subcarriers are set to 0 as the first signal. The time domain length of the first signal is 5 2048-point OFDM symbols.
Step 22: and performing self-interference estimation on the self-interference generated by the first signal on the second time-frequency resource to obtain a self-interference parameter.
The second time-frequency resource is: the second time frequency resource is a time frequency resource affected by the self-interference of the first signal. The second time-frequency resource and the first time-frequency resource satisfy a specific relationship in the frequency domain, for example, the frequency domain range of the second time-frequency resource is an integer multiple, a fractional multiple of the frequency domain range of the first time-frequency resource, or a range related to a difference value of different frequency domain ranges. For example, second-order intermodulation interference generated by the 1.8GHz uplink signal and the 3.5GHz uplink signal may affect the downlink received signal of the terminal near 1.8 GHz; the second harmonic of the 1.8GHz uplink signal can affect the downlink received signal near 3.5 GHz. Further, the second time-frequency resource at least partially overlaps the first time-frequency resource in time domain, in a special embodiment, the time domain range of the second time-frequency resource includes the time domain range of the first time-frequency resource, or both time domain ranges overlap or coincide, so that the complete self-interference signal of the first signal can be estimated.
Wherein the self-interference parameters include: at least one of a first parameter related to harmonic interference, a second parameter related to harmonic hybrid interference, and a third parameter related to intermodulation interference. For the first parameter, the second parameter and the third parameter, the specific parameter items include: channel values of a channel of self-interference, associated parameter terms of a self-interference model (used to reconstruct self-interference), or other parameter terms, etc. The terminal can calculate the self-interference signal of the uplink signal according to the self-interference parameters. It is worth pointing out that steps 21 and 22 are self-interference estimation and training processes, which may be periodic or based on network device indication. Assuming that the process is periodic, the self-interference parameter is not changed within one period. Assuming that the procedure is based on network device indication, the terminal will keep the self-interference parameters unchanged until the network device indicates the terminal to resume self-interference estimation. Therefore, the terminal does not need to carry out self-interference estimation and training each time under the condition of determining the self-interference, the processing workload of the terminal can be reduced, and the electric energy is saved.
Step 23: and under the condition of self-interference, performing self-interference elimination on the received second signal according to the self-interference parameter.
The second signal includes a downlink signal (or called a useful signal) sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, where the self-interference signal may affect the downlink signal. The terminal reconstructs a self-interference signal corresponding to the uplink signal according to the self-interference parameter estimated and trained in step 22 and the uplink signal, and eliminates the self-interference signal from the second signal, so as to improve the reliability of the downlink signal and improve the downlink transmission performance.
In the embodiment of the present invention, before step 21, the method further includes: and receiving configuration information of the first signal from the network equipment, wherein the configuration information is used for instructing the terminal to send the first signal. The configuration information of the embodiment of the present invention may be carried in a first signaling, and the terminal receives the first signaling sent by the network device, where the first signaling instructs the terminal to send a first signal on a first time-frequency resource. The first signaling may be that the network device determines and issues the terminal, or that the network device issues the terminal after receiving the terminal request. Taking the terminal request as an example, the terminal further includes, before the step of receiving the configuration information of the first signal from the network device: sending request information (or called request authorization) to the network equipment; the request information is used to request the network device to send configuration information of the first signal, that is, the request information is used to indicate that the terminal has a need of self-interference estimation and needs to send the first signal. The request information may also include the type of self-interference, such as harmonic interference, harmonic mixed interference, cross-modulation interference, and the like. The first time-frequency resource for sending the first signal may be suggested by the terminal, and in order to save signaling, the terminal may carry the suggested first time-frequency resource in the request information sent to the network device.
Further, for scenarios such as dual connectivity DC, Carrier Aggregation (CA), NRSUL transmission in a specific frequency band, due to non-ideal characteristics of a terminal transmission link, self-interference problems such as harmonic interference, harmonic mixing (harmonic mixing) interference, or cross-modulation interference may be generated when one or more uplink links of the terminal transmit, and the terminal needs to transmit a first signal for self-interference estimation. The network device sends configuration information of the first signal to the terminal, where the configuration information may be sent to the terminal by one of at least one network device that maintains a connection with the terminal.
In this embodiment of the present invention, the configuration information of the first signal includes, but is not limited to, at least one of the following information:
first indication information indicating a first time-frequency resource; when the configuration information is carried in a first signaling sent by the network equipment, the content of the first signaling indication comprises a time frequency resource for sending a first signal; for example, the content of the first signaling indication includes at least one of time domain resources and frequency domain resources on which the first signal is transmitted.
Second indication information indicating a transmission power of the first signal; when the configuration information is carried in a first signaling sent by the network device, the content of the first signaling indication includes the transmission power of the first signal sent by the terminal. Wherein one first signaling may indicate one or more transmit powers and when one first signaling indicates multiple transmit powers, the terminal may traverse different transmit powers, e.g., by a step size of 2 dB. Specifically, when the self-interference is the cross-modulation interference, the terminal needs to traverse various combinations of different transmission powers of at least two uplink frequency points.
Third indication information indicating a transmission antenna of the first signal; when the configuration information is carried in a first signaling sent by the network device, the content of the first signaling indication includes a transmitting antenna for the terminal to send the first signal, and taking NR 2Tx as an example, the first signaling may indicate which of the 2Tx transmitting antennas is the transmitting antenna for sending the first signal.
Fourth indication information indicating a Timing Advance (TA) corresponding to the first signal; when the configuration information is carried in a first signaling sent by the network device, the content of the first signaling indication includes TAs at which the terminal sends the first signal, where one first signaling indication indicates one or more TAs, and when the first signaling indication indicates multiple TAs, the terminal may traverse different TAs. Specifically, when the self-interference is the cross-modulation interference, the terminal needs to traverse various combinations of different TAs of at least two uplink frequency points. It is worth noting that self-interference impact and estimation may be different for different scenarios.
And fifth indication information indicating sequence parameters of a transmission sequence of the first signal, wherein the sequence parameters include, but are not limited to, sequence format, sequence kind, and the like. When the configuration information is carried in a first signaling sent by the network device, the content of the first signaling indication includes what sequence the first signal sent by the terminal has, and a sequence parameter used when the terminal generates the first signal sequence. The set of the sequence format, the sequence type, and the sequence parameter may be predefined (as agreed by a protocol) or configured by the network device side, and the specific sequence format, the sequence type, and the sequence parameter are indicated by the network device side.
Further, in order to ensure that the terminal performs better self-interference estimation, before step 22, the method further includes: and sending a prohibition request for prohibiting downlink transmission on a third time domain resource to the network equipment, wherein the third time domain resource and the second time frequency resource are at least partially overlapped in the time domain. That is, the terminal sends a prohibition request to one of the network devices that maintain connection, so as to request the network device not to perform downlink transmission on the third time-frequency resource, and thus if a signal is received on the third time-frequency resource, all the signals are self-interference signals. Specifically, the terminal requests the second base station for harmonic interference of an EN-DC scene, and requests the first base station for intermodulation interference of the EN-DC scene. The third time-frequency resource may be suggested by the terminal, predefined (e.g., agreed by a protocol), or determined according to the first time-frequency resource and a preset rule. Specifically, the third time-frequency resource is a time-frequency resource associated with the second time-frequency resource, for example, the time-frequency resources of the second time-frequency resource and the third time-frequency resource are the same, or the third time-frequency resource is the second time-frequency resource plus a time-domain or frequency-domain guard band, that is, the third time-frequency resource includes all the time-frequency resources of the second time-frequency resource, so that on the second time-frequency resource, the terminal only receives the self-interference signal, and has no influence of other downlink signals, and the terminal can better perform self-interference estimation.
The embodiment of the invention is suitable for scenes such as DC, CA, SUL and the like. The frequency point corresponding to the first time frequency resource is a first system frequency point, and the frequency point corresponding to the second time frequency resource is a related frequency point which is integral multiple or fractional multiple of the first system frequency point. Taking EN-DC as an example, the frequency point corresponding to the first time-frequency resource is 1.8GHz, the frequency point corresponding to the second time-frequency resource is 3.6GHz, and the second harmonic interference signal generated on the second time-frequency resource may affect the downlink signal of 3.6 GHz. Or the frequency point corresponding to the first time-frequency resource is 3.5GHz, the frequency point corresponding to the second time-frequency resource is 1.75GHz, and the harmonic mixed interference signal generated on the second time-frequency resource can affect the downlink signal of 1.75 GHz.
In addition, the frequency points corresponding to the first time frequency resource are a first system frequency point and a second system frequency point, and the frequency points corresponding to the second time frequency resource are related frequency points of the difference value between the first system frequency point and the second system frequency point. Taking EN-DC as an example, the frequency points corresponding to the first time-frequency resource are 1.8GHz and 3.5GHz, the frequency point corresponding to the second time-frequency resource is 1.7GHz, and the intermodulation interference signal generated on the second time-frequency resource can affect the downlink signal of 1.7 GHz.
In the embodiment of the present invention, the step 21 may be implemented by: and if the frequency point corresponding to the first time frequency resource is the first system frequency point, transmitting a first signal on at least two subcarriers of the first system frequency point. I.e. the first signal is a dual frequency signal. Or, if the frequency points corresponding to the first time frequency resource are the first system frequency point and the second system frequency point, the first signal is sent on at least two subcarriers of the first system frequency point and at least two subcarriers of the second system frequency point. That is, the first signal is transmitted on two subcarriers corresponding to a certain system frequency point (dual-band signal), or transmitted on a plurality of subcarriers.
Further, the first time frequency resource includes at least a part of idle time domain resources of at least one system keeping connection with the terminal, and the idle time domain resources include: at least one of an idle subframe, an idle slot, an idle time domain symbol, a subframe for a guard period, a slot for a guard period, and a time domain symbol for a guard period. For example, the first time-frequency resource is located in or includes an idle time slot of the system, such as Guard Period (GP) of LTE system, or flexible symbol (flexible symbol) of NR system.
In the embodiment of the invention, under the condition of self-interference, self-interference elimination is carried out on the received second signal according to the self-interference parameter. Wherein the second signal comprises: the downlink signal sent by the network device and the self-interference signal generated by the terminal uplink signal, etc. may affect the downlink signal.
Before the step of self-interference elimination, the method further comprises the following steps: transmitting a synchronization signal on a fourth time-frequency resource according to the synchronization indication information; receiving a synchronization signal on a fifth time-frequency resource; and carrying out synchronization according to the synchronization signal. The sequence adopted by the synchronization signal may be a time domain Chu sequence or other types of sequences;
chu sequence generation formula:
Figure BDA0001910443160000091
wherein N is more than or equal to 0 and less than or equal to NZC，NZC839, u is a constant. The time domain length of the synchronization signal may be 1 OFDM symbol. And the fifth time frequency resource and the fourth time frequency resource are at least partially overlapped on the time domain. The synchronization indication information may be sent by the network device to the terminal, that is, before the step of sending the synchronization signal on the fourth time-frequency resource according to the synchronization indication information, the method further includes: synchronization instruction information is received from the network device side. Wherein the synchronization indication information may be carried in the second signaling. That is, the terminal receives a second signaling sent by the network device, where the second signaling instructs the terminal to send a synchronization signal on the fourth time-frequency resource, and receive the synchronization signal on the fifth time-frequency resource for synchronization. And the fifth time-frequency resource is a time-frequency resource influenced by a self-interference signal of the synchronization signal sent on the fourth time-frequency resource.
The first Signal for self-interference estimation mentioned in the embodiments of the present invention may be at least one of a tracking Reference Signal (SRS), a demodulation Reference Signal (De-Modulation Reference Signal, DMRS), a Random Access Channel (RACH) preamble, a Physical Uplink Control Channel (PUCCH), and a dedicated Reference Signal. Wherein the dedicated reference signal may be a dedicated signal for self-interference estimation.
In the embodiment of the present invention, the time-frequency resources (e.g., the first time-frequency resource, the second time-frequency resource, the third time-frequency resource, etc.) include time-domain resources, frequency-domain resources, and time-frequency-domain resources.
In the information transmission method of the embodiment of the invention, the terminal can estimate and train the self-interference elimination related parameters according to the first signal sent by the terminal, further perform self-interference elimination on the received downlink signal, reduce the self-interference influence and improve the downlink performance.
The above embodiments describe information transmission methods in different scenarios, and a terminal corresponding to the method will be further described with reference to the accompanying drawings.
As shown in fig. 3, a terminal 300 according to an embodiment of the present invention can implement the foregoing embodiment to transmit a first signal on a first time-frequency resource; performing self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter; under the condition of self-interference, self-interference elimination is carried out on the received second signal according to the self-interference parameter; the second signal includes a downlink signal sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource and the first time-frequency resource overlap at least partially in a time domain to achieve the same effect, where the terminal 300 specifically includes the following functional modules:
a first transmitting module 310, configured to transmit a first signal on a first time-frequency resource;
an estimating module 320, configured to perform self-interference estimation on self-interference generated by the first signal on the second time-frequency resource to obtain a self-interference parameter;
the processing module is used for performing self-interference elimination on the received second signal according to the self-interference parameter under the condition of self-interference;
the second signal includes a downlink signal sent by the network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain.
Wherein, the terminal 300 further includes:
a first receiving module, configured to receive configuration information of a first signal from a network device; the configuration information is used for instructing the terminal to send a first signal.
Wherein the configuration information comprises at least one of the following information:
first indication information indicating a first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmission antenna of the first signal;
fourth indication information indicating a timing advance TA corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
Wherein, the terminal 300 further includes:
the second sending module is used for sending request information to the network equipment; the request information is used for requesting the network equipment to send configuration information of the first signal.
Wherein, the terminal 300 further includes:
a third sending module, configured to send, to the network device, a prohibition request for prohibiting downlink transmission on a third time domain resource, where the third time domain resource and the second time frequency resource are at least partially overlapped in a time domain.
The frequency point corresponding to the first time frequency resource is a first system frequency point, and the frequency point corresponding to the second time frequency resource is a related frequency point which is integral multiple or fractional multiple of the first system frequency point.
The frequency points corresponding to the first time frequency resource are a first system frequency point and a second system frequency point, and the frequency points corresponding to the second time frequency resource are related frequency points of the difference value between the first system frequency point and the second system frequency point.
The first sending module 310 includes:
the first sending submodule is used for sending a first signal on at least two subcarriers of the first system frequency point when the frequency point corresponding to the first time frequency resource is the first system frequency point;
and the second sending submodule is used for sending the first signal on at least two subcarriers of the first system frequency point and at least two subcarriers of the second system frequency point when the frequency points corresponding to the first time frequency resource are the first system frequency point and the second system frequency point.
Wherein the first time frequency resource comprises at least part of idle time domain resources of at least one system which keeps connection with the terminal, and the idle time domain resources comprise: at least one of an idle subframe, an idle slot, an idle time domain symbol, a subframe for a guard period, a slot for a guard period, and a time domain symbol for a guard period.
Wherein, the terminal 300 further includes:
a fourth sending module, configured to send a synchronization signal on a fourth time-frequency resource according to the synchronization indication information;
a second receiving module, configured to receive a synchronization signal on a fifth time-frequency resource, where the fifth time-frequency resource and the fourth time-frequency resource at least partially overlap in a time domain;
and the synchronization module is used for synchronizing according to the synchronization signal.
Wherein, the terminal 300 further includes:
and the third receiving module is used for receiving the synchronization indication information from the network equipment side.
Wherein the self-interference parameters include: at least one of a first parameter related to harmonic interference, a second parameter related to harmonic hybrid interference, and a third parameter related to intermodulation interference.
Wherein the first signal comprises: at least one of a tracking reference signal SRS, a demodulation reference signal DMRS, a random access channel RACH preamble, a physical uplink control channel PUCCH and a dedicated reference signal.
It is worth pointing out that, the terminal according to the embodiment of the present invention may perform estimation and training of a relevant parameter for self-interference cancellation according to the first signal sent by the terminal itself, and further perform self-interference cancellation on the received downlink signal, so as to reduce the self-interference effect and improve the performance of the downlink.
To better achieve the above object, further, fig. 4 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 40 includes, but is not limited to: radio frequency unit 41, network module 42, audio output unit 43, input unit 44, sensor 45, display unit 46, user input unit 47, interface unit 48, memory 49, processor 410, and power supply 411. Those skilled in the art will appreciate that the terminal configuration shown in fig. 4 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The radio frequency unit 41 is configured to send a first signal on a first time-frequency resource;
the processor 410 is configured to perform self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter, and perform self-interference cancellation on the received second signal according to the self-interference parameter when the self-interference occurs;
the second signal comprises a downlink signal sent by the network equipment and a self-interference signal which is generated by an uplink signal sent by the terminal and influences the downlink signal, and the second time-frequency resource and the first time-frequency resource are at least partially overlapped in a time domain;
the terminal of the embodiment of the invention can estimate and train the self-interference elimination related parameters according to the first signal sent by the terminal, further carry out self-interference elimination on the received downlink signal, reduce the self-interference influence and improve the downlink performance.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 41 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 41 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 41 can also communicate with a network and other devices through a wireless communication system.
The terminal provides wireless broadband internet access to the user via the network module 42, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.
The audio output unit 43 may convert audio data received by the radio frequency unit 41 or the network module 42 or stored in the memory 49 into an audio signal and output as sound. Also, the audio output unit 43 may also provide audio output related to a specific function performed by the terminal 40 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 43 includes a speaker, a buzzer, a receiver, and the like.
The input unit 44 is for receiving an audio or video signal. The input Unit 44 may include a Graphics Processing Unit (GPU) 441 and a microphone 442, and the Graphics processor 441 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 46. The image frames processed by the graphic processor 441 may be stored in the memory 49 (or other storage medium) or transmitted via the radio frequency unit 41 or the network module 42. The microphone 442 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 41 in case of the phone call mode.
The terminal 40 also includes at least one sensor 45, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 461 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 461 and/or a backlight when the terminal 40 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 45 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 46 is used to display information input by the user or information provided to the user. The Display unit 46 may include a Display panel 461, and the Display panel 461 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 47 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 47 includes a touch panel 471 and other input devices 472. The touch panel 471, also referred to as a touch screen, may collect touch operations by a user (e.g., operations by a user on or near the touch panel 471 using a finger, a stylus, or any other suitable object or accessory). The touch panel 471 can include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 471 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 47 may include other input devices 472 in addition to the touch panel 471. Specifically, the other input devices 472 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 471 can be overlaid on the display panel 461, and when the touch panel 471 detects a touch operation on or near the touch panel 471, the touch panel transmits the touch operation to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 461 according to the type of the touch event. Although the touch panel 471 and the display panel 461 are shown as two separate components in fig. 4, in some embodiments, the touch panel 471 and the display panel 461 may be integrated to implement the input and output functions of the terminal, and are not limited herein.
The interface unit 48 is an interface for connecting an external device to the terminal 40. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 48 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the terminal 40 or may be used to transmit data between the terminal 40 and external devices.
The memory 49 may be used to store software programs as well as various data. The memory 49 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 49 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 410 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 49 and calling data stored in the memory 49, thereby performing overall monitoring of the terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.
The terminal 40 may further include a power supply 411 (e.g., a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.
In addition, the terminal 40 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides a terminal, which includes a processor 410, a memory 49, and a computer program stored in the memory 49 and capable of running on the processor 410, where the computer program, when executed by the processor 410, implements each process of the above-mentioned information transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the information transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
The above embodiment describes the information transmission method of the present invention from the terminal side, and the following embodiment further describes the information transmission method of the network device side with reference to the drawings.
As shown in fig. 5, the information transmission method according to the embodiment of the present invention is applied to a network device side, and the method includes the following steps:
step 51: sending configuration information of a first signal for self-interference estimation to a terminal; the configuration information is used for instructing the terminal to transmit the first signal on the first time-frequency resource.
Wherein, the first time-frequency resource can be suggested by the terminal, configured or predefined by the network equipment, etc. The first time frequency resource may be a periodic resource or an aperiodic resource. For example, based on one RB, one RB includes 12 subcarriers, the 4 th subcarrier and the 8 th subcarrier are set to 1, and the rest subcarriers are set to 0 as the first signal. The time domain length of the first signal is 5 2048-point OFDM symbols. The configuration information may be carried in a first signaling, and the terminal receives the first signaling sent by the network device, where the first signaling instructs the terminal to send a first signal on a first time-frequency resource. The first signaling may be that the network device autonomously determines and issues the terminal, or that the network device issues the terminal after receiving a terminal request. Taking the terminal request as an example, step 51 includes: receiving request information from a terminal side; and sending the configuration information to the terminal according to the request information. The request information is used to request the network device to send configuration information of the first signal, that is, the request information is used to indicate that the terminal has a need of self-interference estimation and needs to send the first signal. The request information may also include the type of self-interference, such as harmonic interference, harmonic mixed interference, cross-modulation interference, and the like.
Wherein, step 51 further comprises: configuration information of the first signal is obtained. The acquisition modes include but are not limited to the following modes:
the first mode is that the network equipment autonomously determines, for example, according to the resource scheduling condition.
And the second mode is that the configuration information is received from the other network equipment side, wherein the other network equipment serves the terminal and is different from the network equipment.
The embodiment of the invention can be applied to the scenes of DC, CA, SUL transmission and the like under a specific frequency band, taking DC as an example, the network equipment can be one of a first base station and a second base station in a DC system, and correspondingly, other network equipment is the other one of the first base station and the second base station in the DC system.
And thirdly, receiving the reference configuration information of the first signal from the other network equipment side, and determining the configuration information sent to the terminal according to the reference configuration information.
Wherein the other network device serves the terminal and is different from the network device. The mode is a combination of the mode one and the mode two. It is assumed that the network device may be one of the first base station and the second base station in the DC system and accordingly the other network device is the other of the first base station and the second base station in the DC system. For example, the network device is a first base station, the other network devices are second base stations, the first base station receives reference configuration information of the first signal from the second base station, and the first base station determines configuration information for the first signal according to the received reference configuration information, resource scheduling and other conditions.
After the configuration information is determined by adopting the method, the method further comprises the following steps: and feeding back the configuration information to other network equipment, namely feeding back the finally determined configuration information to other network equipment.
In addition, step 51 may be that the network device directly sends the configuration information to the terminal, or that the configuration information is sent to other network devices and forwarded to the terminal by the other network devices. Specifically, step 51 includes: and sending the configuration information to other network equipment so that the other network equipment forwards the configuration information to the terminal, wherein the other network equipment serves the terminal and is different from the network equipment.
The first time-frequency resource in the embodiment of the present invention may correspond to a network device, that is, the first time-frequency resource is a time-frequency resource of the network device. In addition, the first time-frequency resource may also correspond to other network devices, that is, the first time-frequency resource is a time-frequency resource of other network devices. Taking the first network device as the first base station and the second network device as the second base station as an example, the first base station receives configuration information of self-interference estimation sent by the second base station, where the configuration information indicates that the terminal sends the first signal on the first time-frequency resource, where the first time-frequency resource is a time-frequency resource of the first base station, that is, the terminal sends the first signal on the time-frequency resource of the first base station. In addition, the first time-frequency resource may also be a time-frequency resource of the second base station, that is, the terminal transmits the first signal on the time-frequency resource of the second base station.
The configuration information in the embodiment of the present invention includes, but is not limited to, at least one of the following information:
first indication information indicating a first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmission antenna of the first signal;
fourth indication information indicating a timing advance TA corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
The description of the configuration information may refer to the terminal-side embodiment, and therefore, is not described herein again.
The first signal is used for estimating self-interference of the terminal, and in order to better improve performance of estimating self-interference, step 51 is followed by: and receiving a prohibition request for prohibiting downlink transmission on a third time frequency resource, wherein the third time frequency resource and the second time frequency resource are at least partially overlapped in a time domain, and the second time frequency resource and the first time frequency resource are at least partially overlapped in the time domain. That is, the terminal sends a prohibition request to one of the network devices that maintain connection, so as to request the network device not to perform downlink transmission on the third time-frequency resource, and thus if a signal is received on the third time-frequency resource, all the signals are self-interference signals. The third time-frequency resource may be suggested by the terminal, predefined (e.g., agreed by a protocol), or determined according to the first time-frequency resource and a preset rule. Specifically, the third time-frequency resource is a time-frequency resource associated with the second time-frequency resource, for example, the time-frequency resources of the second time-frequency resource and the third time-frequency resource are the same, or the third time-frequency resource is the second time-frequency resource plus a guard band, that is, the third time-frequency resource includes all the time-frequency resources of the second time-frequency resource, so that on the second time-frequency resource, the terminal only receives the self-interference signal, and has no influence of other downlink signals, and the terminal can perform self-interference estimation better.
In the information transmission method of the embodiment of the present invention, the network device sends the configuration information of the first signal to the terminal to instruct the terminal to send the first signal for self-interference estimation, and the terminal may perform estimation and training of a relevant parameter for self-interference cancellation according to the first signal sent by the terminal itself, further perform self-interference cancellation on the received downlink signal, reduce the self-interference influence, and improve the performance of the downlink.
The above embodiments respectively describe in detail the information transmission methods in different scenarios, and the following embodiments further describe the corresponding network devices with reference to the accompanying drawings.
As shown in fig. 6, a network device 600 according to an embodiment of the present invention can implement sending configuration information of a first signal for self-interference estimation to a terminal in the foregoing embodiment; the configuration information is used to instruct the terminal to send details of the first signal method on the first time-frequency resource, and achieve the same effect, and the network device 600 specifically includes the following functional modules:
a fifth sending module 610, configured to send configuration information of the first signal for self-interference estimation to the terminal; the configuration information is used for instructing the terminal to transmit a first signal on a first time-frequency resource.
Wherein, the network device 600 further includes:
and a fourth receiving module, configured to receive the configuration information from another network device, where the other network device serves the terminal and is different from the network device.
Wherein, the network device 600 further includes:
a fifth receiving module, configured to receive reference configuration information of the first signal from another network device side, where the other network device serves the terminal and is different from the network device;
and the determining module is used for determining the configuration information sent to the terminal according to the reference configuration information.
Wherein, the network device 600 further includes:
and the feedback module is used for feeding back the configuration information to other network equipment.
Wherein, the fifth sending module 610 includes:
and the second sending submodule is used for sending the configuration information to other network equipment so that the other network equipment forwards the configuration information to the terminal, wherein the other network equipment serves the terminal and is different from the network equipment.
The first time-frequency resource corresponds to a network device, or the first time-frequency resource corresponds to other network devices.
Wherein the configuration information comprises at least one of the following information:
first indication information indicating a first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmission antenna of the first signal;
fourth indication information indicating a timing advance TA corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
Wherein, the fifth sending module 610 includes:
the first receiving submodule is used for receiving request information from a terminal side;
and the third sending submodule is used for sending the configuration information to the terminal according to the request information.
Wherein, the network device 600 further includes:
a sixth receiving module, configured to receive a prohibition request for prohibiting downlink transmission on a third time-frequency resource, where the third time-frequency resource and the second time-frequency resource are at least partially overlapped in a time domain, and the second time-frequency resource and the first time-frequency resource are at least partially overlapped in the time domain.
It is worth pointing out that, the network device in the embodiment of the present invention sends the configuration information of the first signal to the terminal to instruct the terminal to send the first signal for self-interference estimation, and the terminal may perform estimation and training of a relevant parameter for self-interference cancellation according to the first signal sent by the terminal itself, further perform self-interference cancellation on the received downlink signal, reduce the self-interference influence, and improve the downlink performance.
It should be noted that the division of the modules of the network device and the terminal is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a Central Processing Unit (CPU) or other processor that can invoke the program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).
In order to better achieve the above object, an embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the steps in the information transmission method described above are implemented. Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the information transmission method as described above.
Specifically, the embodiment of the invention also provides a network device. As shown in fig. 7, the network device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73. The antenna 71 is connected to a radio frequency device 72. In the uplink direction, the rf device 72 receives information via the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes information to be transmitted and transmits the information to the rf device 72, and the rf device 72 processes the received information and transmits the processed information through the antenna 71.
The above-mentioned band processing means may be located in the baseband means 73, and the method performed by the network device in the above embodiment may be implemented in the baseband means 73, where the baseband means 73 includes a processor 74 and a memory 75.
The baseband device 73 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, wherein one of the chips, for example, the processor 74, is connected to the memory 75 to call up the program in the memory 75 to perform the network device operation shown in the above method embodiment.
The baseband device 73 may further include a network interface 76, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 72.
The processor may be a single processor or a combination of multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the methods performed by the network devices, for example: one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, or the like. The storage element may be a memory or a combination of a plurality of storage elements.
The memory 75 may be either volatile memory or nonvolatile memory, or may 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 illustration and 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 Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 75 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
Specifically, the network device of the embodiment of the present invention further includes: a computer program stored on the memory 75 and executable on the processor 74, the processor 74 calling the computer program in the memory 75 to execute the method performed by each module shown in fig. 6.
In particular, the computer program when invoked by the processor 74 is operable to perform: sending configuration information of a first signal for self-interference estimation to a terminal; wherein the configuration information is used for instructing the terminal to transmit the first signal on a first time-frequency resource.
The network device in the embodiment of the present invention sends the configuration information of the first signal to the terminal to instruct the terminal to send the first signal for self-interference estimation, and the terminal may perform estimation and training of a relevant parameter for self-interference cancellation according to the first signal sent by the terminal, and further perform self-interference cancellation on the received downlink signal, thereby reducing self-interference influence and improving downlink performance.
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 invention.
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 embodiments provided in the present application, it should be understood that the disclosed 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 invention 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 invention may be embodied in the form of a software product, which is stored in a storage medium and includes 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 invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (40)

1. An information transmission method applied to a terminal side, comprising:
transmitting a first signal on a first time-frequency resource;
performing self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter;
under the condition of self-interference, self-interference elimination is carried out on the received second signal according to the self-interference parameter;
the second signal includes a downlink signal sent by a network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain.
2. The information transmission method of claim 1, wherein the step of transmitting the first signal on the first time-frequency resource is preceded by the step of:
receiving configuration information of the first signal from a network device; wherein the configuration information is used for instructing the terminal to transmit the first signal.
3. The information transmission method according to claim 2, wherein the configuration information includes at least one of the following information:
first indication information indicating the first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmitting antenna of the first signal;
fourth indication information indicating a Timing Advance (TA) corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
4. The information transmission method according to claim 2, wherein the step of receiving the configuration information of the first signal from the network device is preceded by:
sending request information to the network equipment; wherein the request information is used for requesting the network device to send configuration information of the first signal.
5. The information transmission method according to claim 1, wherein before the step of performing self-interference estimation on the self-interference generated by the first signal on the second time-frequency resource to obtain the self-interference parameter, the method further comprises:
and sending a prohibition request for prohibiting downlink transmission on a third time domain resource to the network equipment, wherein the third time domain resource and the second time frequency resource are at least partially overlapped in time domain.
6. The information transmission method according to claim 1, wherein the frequency point corresponding to the first time-frequency resource is a first system frequency point, and the frequency point corresponding to the second time-frequency resource is a frequency point related to an integer multiple or a fractional multiple of the first system frequency point.
7. The information transmission method according to claim 1, wherein the frequency points corresponding to the first time-frequency resource are a first system frequency point and a second system frequency point, and the frequency points corresponding to the second time-frequency resource are frequency points related to a difference between the first system frequency point and the second system frequency point.
8. The method of claim 6 or 7, wherein the step of transmitting the first signal on the first time/frequency resource comprises:
if the frequency point corresponding to the first time frequency resource is a first system frequency point, the first signal is sent on at least two subcarriers of the first system frequency point;
and if the frequency points corresponding to the first time frequency resource are a first system frequency point and a second system frequency point, sending the first signal on at least two subcarriers of the first system frequency point and at least two subcarriers of the second system frequency point.
9. The information transmission method according to claim 1, wherein the first time-frequency resource comprises at least a part of idle time domain resources of at least one system maintaining connection with the terminal, and the idle time domain resources comprise: at least one of an idle subframe, an idle slot, an idle time domain symbol, a subframe for a guard period, a slot for a guard period, and a time domain symbol for a guard period.
10. The information transmission method according to claim 1, wherein before the step of performing self-interference cancellation on the received second signal according to the self-interference parameter, the method further comprises:
transmitting a synchronization signal on a fourth time-frequency resource according to the synchronization indication information;
receiving the synchronization signal on a fifth time-frequency resource, wherein the fifth time-frequency resource and the fourth time-frequency resource at least partially overlap in a time domain;
and carrying out synchronization according to the synchronization signal.
11. The information transmission method according to claim 10, wherein the step of transmitting the synchronization signal on the fourth time-frequency resource according to the synchronization indication information further comprises:
and receiving synchronization indication information from the network equipment side.
12. The information transmission method according to claim 1, wherein the self-interference parameter comprises: at least one of a first parameter related to harmonic interference, a second parameter related to harmonic hybrid interference, and a third parameter related to intermodulation interference.
13. The information transmission method according to claim 1, wherein the first signal includes: at least one of a tracking reference signal SRS, a demodulation reference signal DMRS, a random access channel RACH preamble, a physical uplink control channel PUCCH and a dedicated reference signal.
14. A terminal, comprising:
a first transmitting module, configured to transmit a first signal on a first time-frequency resource;
the estimation module is used for performing self-interference estimation on self-interference generated by the first signal on a second time-frequency resource to obtain a self-interference parameter;
the processing module is used for performing self-interference elimination on the received second signal according to the self-interference parameter under the condition of self-interference;
the second signal includes a downlink signal sent by a network device and a self-interference signal generated by an uplink signal sent by the terminal, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in a time domain.
15. The terminal of claim 14, wherein the terminal further comprises:
a first receiving module, configured to receive configuration information of the first signal from a network device; wherein the configuration information is used for instructing the terminal to transmit the first signal.
16. The terminal of claim 15, wherein the configuration information comprises at least one of the following information:
first indication information indicating the first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmitting antenna of the first signal;
fourth indication information indicating a Timing Advance (TA) corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
17. The terminal of claim 15, wherein the terminal further comprises:
the second sending module is used for sending request information to the network equipment; wherein the request information is used for requesting the network device to send configuration information of the first signal.
18. The terminal of claim 14, wherein the terminal further comprises:
a third sending module, configured to send, to the network device, a prohibition request for prohibiting downlink transmission on a third time domain resource, where the third time domain resource and the second time frequency resource are at least partially overlapped in a time domain.
19. The terminal of claim 14, wherein the first sending module comprises:
the first sending submodule is used for sending the first signal on at least two subcarriers of the first system frequency point when the frequency point corresponding to the first time frequency resource is the first system frequency point;
and the second sending submodule is used for sending the first signal on at least two subcarriers of the first system frequency point and at least two subcarriers of the second system frequency point when the frequency points corresponding to the first time frequency resource are the first system frequency point and the second system frequency point.
20. The terminal of claim 14, wherein the terminal further comprises:
a fourth sending module, configured to send a synchronization signal on a fourth time-frequency resource according to the synchronization indication information;
a second receiving module, configured to receive the synchronization signal on a fifth time-frequency resource, where the fifth time-frequency resource and the fourth time-frequency resource at least partially overlap in a time domain;
and the synchronization module is used for carrying out synchronization according to the synchronization signal.
21. The terminal of claim 20, wherein the terminal further comprises:
and the third receiving module is used for receiving the synchronization indication information from the network equipment side.
22. A terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and running on the processor, which computer program, when executed by the processor, carries out the steps of the information transmission method according to any one of claims 1 to 13.
23. An information transmission method is applied to a network device side, and is characterized by comprising the following steps:
sending configuration information of a first signal for self-interference estimation to a terminal; wherein the configuration information is used for instructing the terminal to transmit the first signal on a first time-frequency resource.
24. The information transmission method according to claim 23, wherein the step of sending configuration information of the first signal for self-interference estimation to the terminal is preceded by the step of:
receiving the configuration information from the other network device side, wherein the other network device serves the terminal and is different from the network device.
25. The information transmission method according to claim 23, wherein the step of sending configuration information of the first signal for self-interference estimation to the terminal is preceded by the step of:
receiving reference configuration information of the first signal from a side of other network equipment, wherein the other network equipment serves the terminal and is different from the network equipment;
and determining the configuration information sent to the terminal according to the reference configuration information.
26. The information transmission method according to claim 25, wherein after the step of determining the configuration information to be transmitted to the terminal according to the reference configuration information, further comprising:
and feeding back the configuration information to the other network equipment.
27. The information transmission method according to claim 23, wherein the step of sending configuration information of the first signal for self-interference estimation to the terminal comprises:
and sending the configuration information to other network equipment to enable the other network equipment to forward the configuration information to the terminal, wherein the other network equipment serves the terminal and is different from the network equipment.
28. The information transmission method according to any one of claims 24 to 27, wherein the first time-frequency resource corresponds to the network device, or wherein the first time-frequency resource corresponds to the other network device.
29. The information transmission method according to claim 23, wherein the configuration information includes at least one of the following information:
first indication information indicating the first time-frequency resource;
second indication information indicating a transmission power of the first signal;
third indication information indicating a transmitting antenna of the first signal;
fourth indication information indicating a Timing Advance (TA) corresponding to the first signal; and
fifth indication information indicating a sequence parameter of a transmission sequence of the first signal.
30. The information transmission method according to claim 23, wherein the step of sending configuration information of the first signal of self-interference estimation to the terminal comprises:
receiving request information from the terminal side;
and sending the configuration information to the terminal according to the request information.
31. The information transmission method according to claim 23, wherein the step of sending the configuration information of the first signal for self-interference estimation to the terminal further comprises:
receiving a prohibition request for prohibiting downlink transmission on a third time frequency resource, wherein the third time frequency resource and a second time frequency resource are at least partially overlapped in a time domain, and the second time frequency resource and the first time frequency resource are at least partially overlapped in the time domain.
32. A network device, comprising:
a fifth sending module, configured to send configuration information of the first signal for self-interference estimation to the terminal; wherein the configuration information is used for instructing the terminal to transmit the first signal on a first time-frequency resource.
33. The network device of claim 32, wherein the network device further comprises:
a fourth receiving module, configured to receive the configuration information from another network device, where the other network device serves the terminal and is different from the network device.
34. The network device of claim 32, wherein the network device further comprises:
a fifth receiving module, configured to receive reference configuration information of the first signal from another network device, where the other network device serves the terminal and is different from the network device;
and the determining module is used for determining the configuration information sent to the terminal according to the reference configuration information.
35. The network device of claim 34, wherein the network device further comprises:
and the feedback module is used for feeding back the configuration information to the other network equipment.
36. The network device of claim 32, wherein the fifth sending module comprises:
and a second sending submodule, configured to send the configuration information to other network devices, so that the other network devices forward the configuration information to the terminal, where the other network devices serve the terminal and are different from the network device.
37. The network device of claim 32, wherein the fifth sending module comprises:
a first receiving submodule for receiving request information from the terminal side;
and the third sending submodule is used for sending the configuration information to the terminal according to the request information.
38. The network device of claim 32, wherein the network device further comprises:
a sixth receiving module, configured to receive a prohibition request for prohibiting downlink transmission on a third time-frequency resource, where the third time-frequency resource is at least partially overlapped with a second time-frequency resource in a time domain, and the second time-frequency resource is at least partially overlapped with the first time-frequency resource in the time domain.
39. A network device comprising a processor, a memory, and a computer program stored on the memory and running on the processor, the processor implementing the steps of the information transmission method according to any one of claims 23 to 31 when executing the computer program.
40. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the information transmission method according to one of claims 1 to 13, 23 to 31.
CN201811550208.5A 2018-12-18 2018-12-18 Information transmission method, terminal and network equipment Active CN111277300B (en)

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