CN110034898B

CN110034898B - Reference signal transmission method and device

Info

Publication number: CN110034898B
Application number: CN201810032710.0A
Authority: CN
Inventors: 黄秋萍; 拉盖施; 高秋彬; 陈润华
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2021-11-16
Anticipated expiration: 2038-01-12
Also published as: CN110034898A

Abstract

The application discloses a reference signal transmission method and device. In the application, a base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send a first reference signal according to resource configuration information of the first reference signal; the base station receives a first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit meeting n + K, n is used for identifying the sending time unit of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K, and K is an integer greater than or equal to 0.

Description

Reference signal transmission method and device

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting a reference signal.

Background

In the existing communication system, some reference signals are configured to be transmitted. For example, if the reference signal resources are configured, the reference signal may be transmitted periodically, such as a periodic Sounding Reference Signal (SRS) and a periodic channel state information-reference signal (CSI-RS). Some reference signals are configured not to start transmission immediately, but to be triggered (trigger) before transmission. For example, an aperiodic reference signal in a Long Term Evolution (LTE) system, transmission is started only after a base station sends an activation (activate) signaling to a terminal, and the transmission is only sent once. Some reference signals are configured not to start transmission immediately, but are activated to start transmission and are transmitted periodically until a deactivation command is received. Such as semi-persistent reference signals in LTE systems.

If the base station configures a certain reference signal for the terminal and sends a trigger or activation signaling of the reference signal to the terminal, after receiving the signaling, the terminal needs to determine the sending time of the reference signal according to the time sequence relation between the trigger and the sending of the reference signal.

In the NR (5G) system, a timing relationship determination method of a trigger time and a transmission time of an aperiodic reference signal has not been given.

Disclosure of Invention

The embodiment of the application provides a reference signal transmission method and device.

In a first aspect, a method for transmitting a reference signal is provided, where the method includes:

a base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send a first reference signal according to resource configuration information of the first reference signal;

the base station receives a first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

Optionally, the first reference signal trigger or activation signaling is further used to instruct the terminal to receive a second reference signal associated with the first reference signal;

the method further comprises the following steps:

and the base station transmits a second reference signal associated with the first reference signal to the terminal, wherein the initial transmission time unit of the second reference signal is a first downlink time unit with the number n + R, R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

Optionally, the value of R or X is agreed in advance by the base station and the terminal; or the base station informs the terminal of the value of R or X through signaling.

Optionally, the notifying, by the base station, the value of R or X to the terminal through signaling includes:

the base station sends information control information DCI to the terminal, wherein the DCI carries the value of the R or the X; or

The base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the R or the X; or

And the base station sends a high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of the R or the X, and the DCI carries a value selected from the plurality of values.

Optionally, the method further comprises:

and the base station indicates the analog beam forming information for sending the first reference signal and the analog beam forming information for receiving the second reference signal to the terminal.

Optionally, the method further comprises:

the base station indicates a second reference signal associated with the first reference signal to the terminal;

and if the base station does not send the second reference signal associated with the first reference signal to the terminal within the set time range, the base station abandons the decoding of the first reference signal.

Optionally, if the terminal does not receive the second reference signal associated therewith in said time frame, the first reference signal is not transmitted on the timing resource allocated by the hypothetical base station for the first reference signal.

Optionally, the setting the time range includes:

one or a consecutive plurality of time units between the nth time unit and the n + k th time unit; or

Before the n + k-X time unit. The X may be a preset value, or a value indicated to the terminal by the base station through signaling, or a value predetermined by the base station and the terminal and determined based on a certain rule.

K1 may be a preset value, or a value indicated to the terminal by the base station through signaling, or a value predetermined by the base station and the terminal and determined based on a certain rule.

Optionally, the value of K or Z is agreed in advance by the base station and the terminal; or the base station informs the terminal of the value of K or Z through signaling.

Optionally, the notifying, by the base station through signaling, the value of K or Z to the terminal includes:

the base station sends information control information DCI to the terminal, wherein the DCI carries the value of the K or the Z; or

The base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the K or the Z; or

And the base station sends a high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of K or Z, and the DCI carries a value selected from the plurality of values.

In a second aspect, a method for transmitting a reference signal is provided, the method including:

a terminal receives a first reference signal trigger or activation signaling sent by a base station, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send a first reference signal according to resource configuration information of the first reference signal;

the terminal sends a first reference signal to the base station according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the method further comprises the following steps:

the terminal receives a second reference signal associated with the first reference signal, which is sent by the base station, according to the first reference signal triggering or activating signaling, where an initial sending time unit of the second reference signal is a first downlink time unit satisfying a number n + R, where R is an integer greater than or equal to R or R-X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

Optionally, the method further comprises:

the terminal determines precoding of the first reference signal according to received information and/or channel information of a second reference signal associated with the first reference signal;

the terminal sends a first reference signal to the base station, and the method comprises the following steps:

and the terminal sends the precoded first reference signal to the base station.

Optionally, the method further comprises:

the terminal receives a second reference signal which is sent by the base station and is associated with the first reference signal;

the terminal determines the precoding of the first reference signal according to the received receiving information and/or channel information of the second reference signal sent by the base station; wherein the second reference signal is associated with the first reference signal.

Optionally, the determining, by the terminal, precoding of the first reference signal according to the received reception information and/or channel information of the second reference signal sent by the base station includes:

and the terminal determines the precoding of the first reference signal according to the receiving information and/or the channel information of the second reference signal received in the appointed time range.

Optionally, the specified time range includes:

the n + k-T1 time units and the time units preceding the n + k-T1 time units, T1 being an integer greater than or equal to 0; alternatively, the first and second electrodes may be,

the time units between the n + k-T1 th time unit and the n + k-T2 th time unit, T3 and T4 are integers which are greater than or equal to 0, and T1 is greater than T2.

Optionally, the determining, by the terminal, precoding of the first reference signal according to the received information and/or channel information of the second reference signal associated with the first reference signal received in the designated time range includes:

if the terminal receives a plurality of second reference signals associated with the first reference signal in the designated time range, selecting a second reference signal with a receiving time unit closest to the nth + k time units from the plurality of second reference signals, or selecting a second reference signal with a receiving time unit closest to the nth time unit, or selecting a second reference signal with a receiving time unit after the nth time unit and closest to the nth time unit; the nth time unit is a receiving unit for triggering or activating the signaling by the first reference signal;

and the terminal determines the precoding of the first reference signal according to the selected receiving information and/or channel information of the second reference signal.

Optionally, the receiving a second reference signal associated with the first reference signal and transmitted by the base station includes:

and the terminal receives a second reference signal associated with the first reference signal according to the analog beamforming information which is indicated by the base station and used for sending the first reference signal.

In a third aspect, a method for transmitting a reference signal is provided, where the method includes:

a base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to receive a first reference signal;

the base station sends a first reference signal according to the resource configuration information of the first reference signal; wherein the initial transmission time unit of the first reference signal is a first uplink time unit satisfying a number n + K, where n is used to identify a transmission time unit number of the first reference signal trigger or activation signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0

Optionally, the first reference signal trigger or activation signaling is further used to instruct the terminal to transmit a second reference signal associated with the first reference signal;

the method further comprises the following steps:

and the base station receives a second reference signal which is sent by the terminal and is associated with the first reference signal according to the first reference signal triggering or activating signaling, wherein an initial sending time unit of the second reference signal is a first downlink time unit which meets the condition that the number is n + R, R is an integer which is greater than or equal to R or R is X, R is an integer which is greater than or equal to 0, and X is an integer which is greater than or equal to 0.

Optionally, the method further comprises:

and the base station indicates the analog beam forming information for receiving the first reference signal and the analog beam forming information for sending the second reference signal to the terminal.

Optionally, the method further comprises:

the base station receives a second reference signal which is sent by the terminal and is associated with the first reference signal;

the base station determines the precoding of the first reference signal according to the received receiving information and/or channel information of the second reference signal sent by the terminal; wherein the second reference signal is associated with the first reference signal.

Optionally, the determining, by the base station, precoding of the first reference signal according to the received reception information and/or channel information of the second reference signal sent by the terminal includes:

and the base station determines the precoding of the first reference signal according to the receiving information and/or the channel information of the second reference signal received in the appointed time range.

Optionally, the determining, by the base station, precoding of the first reference signal according to the received information and/or channel information of the second reference signal associated with the first reference signal, which is received in a specified time range, includes:

if the base station receives a plurality of second reference signals associated with the first reference signal in the designated time range, selecting a second reference signal with a receiving time unit closest to the nth + k time units from the plurality of second reference signals, or selecting a second reference signal with a receiving time unit closest to the nth time unit, or selecting a second reference signal with a receiving time unit after the nth time unit and closest to the nth time unit; the nth time unit is a receiving unit for triggering or activating the signaling by the first reference signal;

and the base station determines the precoding of the first reference signal according to the selected receiving information and/or channel information of the second reference signal.

In a fourth aspect, a method for transmitting a reference signal is provided, where the method includes:

a terminal receives a first reference signal trigger or activation signaling sent by a base station, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to receive a first reference signal according to resource configuration information of the first reference signal;

the terminal receives a first reference signal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the method further comprises the following steps:

and the terminal transmits a second reference signal associated with the first reference signal to the base station, wherein the initial transmission time unit of the second reference signal is a first uplink time unit with the number of n + R, R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

Optionally, the method further comprises:

and the terminal sends a second reference signal associated with the first reference signal according to the analog beamforming information which is indicated by the base station and used for receiving the first reference signal.

In a fifth aspect, a base station is provided, including:

a first sending module, configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to send a first reference signal according to resource configuration information of the first reference signal;

a receiving module, configured to receive a first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the base station further comprises:

a second sending module, configured to send a second reference signal associated with the first reference signal to the terminal, where an initial sending time unit of the second reference signal is a first downlink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

In a sixth aspect, a terminal is provided, including:

a first receiving module, configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct a terminal to send a first reference signal according to resource configuration information of the first reference signal;

a sending module, configured to send a first reference signal to the base station according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the terminal further comprises:

a second receiving module, configured to receive, according to the first reference signal trigger or the activation signaling, a second reference signal that is sent by the base station and is associated with the first reference signal, where an initial sending time unit of the second reference signal is a first downlink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

In a seventh aspect, a base station is provided, including:

a sending module, configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal;

a first receiving module, configured to send a first reference signal according to the resource configuration information of the first reference signal; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the base station further comprises:

a second receiving module, configured to receive, according to the first reference signal trigger or activation signaling, a second reference signal that is sent by the terminal and is associated with the first reference signal, where an initial sending time unit of the second reference signal is a first uplink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

In an eighth aspect, there is provided a terminal comprising:

a receiving module, configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct a terminal to receive a first reference signal according to resource configuration information of the first reference signal;

a first sending module, configured to send a first reference signal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

the terminal further comprises:

a second sending module, configured to send a second reference signal associated with the first reference signal to the base station, where an initial sending time unit of the second reference signal is a first uplink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

In a ninth aspect, there is provided a base station comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is configured to read a program in the memory and execute the method of any of the first aspect.

In a tenth aspect, there is provided a terminal comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is configured to read a program in the memory and execute the method of any of the second aspects.

In an eleventh aspect, there is provided a base station comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is configured to read a program in the memory and execute the method of any of the third aspects.

In a twelfth aspect, a terminal is provided, which includes: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is configured to read a program in the memory and execute the method of any one of the above fourth aspects.

In a thirteenth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any of the above first aspects.

In a fourteenth aspect, there is provided a computer storage medium having computer-executable instructions stored thereon for causing the computer to perform the method of any of the second aspects above.

In a fifteenth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any of the above third aspects.

In a sixteenth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions for causing the computer to perform the method of any of the fourth aspects above.

Drawings

FIG. 1 is a schematic diagram of a system architecture suitable for use in embodiments of the present application;

fig. 2 is a schematic diagram illustrating a transmission flow of an uplink reference signal according to an embodiment of the present application;

fig. 3 is a schematic diagram of a downlink reference signal transmission flow provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a base station according to another embodiment of the present application;

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

fig. 8 is a schematic structural diagram of a base station according to another embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal according to another embodiment of the present application.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.

(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, a schematic diagram of a possible communication scenario provided in the embodiment of the present application is shown. As shown in fig. 1, a terminal 110 accesses a wireless network through a Radio Access Network (RAN) node 120 to acquire a service of an external network (e.g., the internet) through the wireless network or to communicate with other terminals through the wireless network.

Among them, a terminal is also called User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., and is a device providing voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.

The RAN is the part of the network that accesses the terminal to the wireless network. A RAN node (or device) is a node (or device) in a radio access network, which may also be referred to as a base station. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In addition, in one network configuration, the RAN may include a Centralized Unit (CU) node and a Distributed Unit (DU) node.

The communication architecture may be an access network architecture in a 5G system, an Evolution version of a Long Term Evolution (LTE) system, or other Orthogonal Frequency Division Multiplexing (OFDM) system or a Discrete Fourier Transform-Spread OFDM (DFT-S-OFDM) system.

The embodiments of the present application take a base station and a terminal as examples for description.

The network architecture described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that as the network architecture evolves, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The precoding in the embodiment of the present application may be referred to as precoding in the analog domain; or, precoding in the digital domain; or, mixed pre-coding in analog and digital domains; or, beam forming in analog domain; or, beamforming in the digital domain; or, hybrid beamforming in analog and digital domains; or, beamforming. The embodiments of the present application are not limited by name.

It should be noted that some specific implementations of "associating the first reference signal with the second reference signal" described in the embodiments of the present invention include, but are not limited to:

the base station indicates, to the terminal through signaling, that the resource corresponding to the first reference signal is associated with the resource of the second reference signal, for example, the first reference signal is an SRS signal, and the second reference signal is a CSI-RS signal. The association of the first reference signal and the second reference signal is the association of the SRS resource and the CSI-RS resource, namely, a certain SRS resource ID is associated with one CSI-RS resource ID, namely, the SRS transmission corresponding to the SRS resource ID has an association relation with the CSI-RS transmission corresponding to the CSI-RS resource ID; alternatively, the first and second electrodes may be,

the base station indicates, to the terminal through signaling, that a resource set in which a resource corresponding to the first reference signal is located is associated with a resource of the second reference signal, for example, the first reference signal is an SRS signal, and the second reference signal is a CSI-RS signal. The specific way of associating the first reference signal with the second reference signal is the association of an SRS resource set (SRS resource set) with a CSI-RS resource, that is, a certain SRS resource set ID is associated with one CSI-RS resource ID, that is, an SRS transmission of the corresponding SRS resource belonging to the SRS resource set ID has an association relationship with a CSI-RS transmission corresponding to the CSI-RS resource ID; alternatively, the first and second electrodes may be,

the base station indicates, to the terminal through signaling, that a resource set in which a resource corresponding to the first reference signal is located is associated with a resource of the second reference signal, for example, the first reference signal is an SRS signal, and the second reference signal is a CSI-RS signal. The specific way of associating the first reference signal with the second reference signal is the association of an SRS resource set (SRS resource set) with a CSI-RS resource set, that is, a certain SRS resource set ID is associated with one CSI-RS resource set ID, that is, the SRS transmission of the corresponding SRS resource belonging to the SRS resource set ID has an association relationship with the CSI-RS transmission of the corresponding CSI-RS resource belonging to the CSI-RS resource set ID.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 2, a schematic diagram of a transmission flow of an uplink reference signal provided in the embodiment of the present application is shown.

In this flow, the first reference signal is an uplink reference signal, for example, the uplink reference signal may include an SRS. The second reference signal is a downlink reference signal, for example, the downlink reference signal may include CSI-RS. The embodiments of the present application do not limit the types of the first reference signal and the second reference signal.

The process may include:

s201: the base station sends a first reference signal trigger or activation signaling to the terminal.

Alternatively, the base station may send the first reference signal trigger or activation signaling through Downlink Control Information (DCI). Here, the "first reference signal trigger or activation signaling" is used to distinguish from the "second reference signal trigger or activation signaling", i.e., to partition two different signaling. It should be noted that, in the embodiment of the present application, the naming manner of the "first reference signal trigger or activation signaling" and the "second reference signal trigger or activation signaling" is not limited.

Optionally, the first reference signal trigger or activation signaling is used to instruct the terminal to send the first reference signal according to the resource configuration information of the first reference signal.

Wherein the resource configuration information of the first reference signal may include resources and/or resource sets of the first reference signal. The set of resources for the first reference signal may include one or more resources for the first reference signal, and the resource for one first reference signal may include one or more resource configuration parameters. For example, taking SRS as an example, one SRS resource set (SRS resource set) may include one or more SRS resource configurations, and one SRS resource configuration may include SRS port number, SRS time domain type indication, SRS period, SRS time-frequency resource position in one slot (slot), and the like. It should be noted that, in the embodiment of the present application, the triggering or activating signaling of the first reference signal may correspond to one triggering information to simultaneously trigger the transmission of multiple reference signals or one triggering information to trigger the transmission of only one reference signal, which is not limited in the embodiment of the present application.

The resource configuration information of the first reference signal may be configured for the terminal by the base station.

In the embodiment of the present application, for convenience of description, a sending time unit of the first reference signal triggering or activating signaling is referred to as an nth time unit, where n may be a number of the time unit. The time units may be time slots, or other granularity of time units. Taking SRS as an example, in S201, a base station sends an SRS trigger or activation signaling to a terminal at slot n for an SRS resource or an SRS resource set configured for the terminal.

S202: and after receiving the first reference signal triggering or activating signaling, the terminal sends the first reference signal according to the signaling.

In this step, the terminal may determine, according to the sending time unit of the first reference signal triggering or activating the signaling, the initial sending time unit of the first reference signal, that is, determine a timing relationship between the triggering time and the sending time of the first reference signal, and send the first reference signal according to the determined timing relationship and the resource configuration information of the first reference signal.

The initial sending time unit of the first reference signal is the first uplink time unit meeting the time unit number n + k. Where n is used to identify a transmission time unit (for example, a number of the transmission time unit) of the first reference signal trigger or activation signaling, K is an integer greater than or equal to K, and K is an integer greater than or equal to 0.

The first uplink time unit satisfying n + k may be a time unit in which the first reference signal may be transmitted in the time units starting from the (n + k) -th time unit and going backward. For example, if K is equal to K, the first uplink time unit satisfying n + K may be the (n + K) th time unit (if the time unit is an uplink time unit), and if the (n + K) th time unit is not an uplink time unit, the first uplink time unit thereafter is the transmission time unit of the first reference signal. Taking the SRS as an example, the first uplink time slot from the (n + k) th time slot to the back satisfies the uplink signal and the uplink channel priority specified by the protocol.

As another mode, the initial transmission time unit of the first reference signal is the first uplink time unit satisfying the time unit number n + k. Where n is used to identify a transmission time unit (for example, a number of the transmission time unit) of the first reference signal trigger or activation signaling, where k is equal to Z, and Z is an integer greater than or equal to 0. Alternatively, if the first time unit satisfying the time unit number n + k (i.e., the time unit with the time number n + Z) is not an uplink time unit, the terminal does not send the first reference signal. The base station also does not decode the first reference signal on the (n + k) th time unit.

Optionally, the value of K (or Z) may be predetermined by the base station and the terminal. The value of K (or Z) may also be notified to the terminal by the base station through signaling.

Optionally, the base station may notify the value of K (or Z) to the terminal in the following manner:

mode 1: and the base station sends DCI to the terminal, wherein the DCI carries the value of the K (or Z). For example, the base station may be through DCI

A number of bits to indicate the value of K (or Z), where M is the predefined number of possible values of K (or Z).

Mode 2: and the base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the K (or Z). The higher layer signaling may include Radio Resource Control (RRC) signaling or Media Access Control (MAC) signaling. The embodiment of the present application does not limit the type of the high layer signaling.

Mode 3: and the base station sends a high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of the K (or Z), and the DCI carries one value selected from the plurality of values. For example, the base station configures M possible values of K (or Z) for the terminal through RRC signaling, and then configures the M possible values of K (or Z) through DCI

A bit is toIndicating the specific value of K (or Z).

The base station can configure the timing relationship between the triggering and sending of the first reference signal more flexibly by signaling the scheme of signaling the value of K (or Z) so as to adapt to different requirements.

S203: and the base station receives a first reference signal which is triggered or activated by the terminal according to the first reference signal and is sent by the signaling.

In this step, the base station may determine, according to the sending time unit of the first reference signal triggering or activating the signaling, the sending time unit of the first reference signal or the receiving time unit of the first reference signal (the sending time unit of the first reference signal and the receiving time unit of the first reference signal are equivalent to each other), that is, determine a timing relationship between the triggering time and the sending time of the first reference signal, and receive the first reference signal sent by the terminal according to the determined timing relationship and the resource configuration information of the first reference signal. The method for the base station to determine the initial sending time unit of the first reference signal is the same as the method adopted by the terminal.

Optionally, on the basis of the foregoing embodiments, the base station may further send, to the terminal, a second reference signal associated with the first reference signal, where the second reference signal is a downlink reference signal. The terminal may determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal, perform precoding processing on the first reference signal with the determined precoding, and then transmit the precoded first reference signal. Since the receiving information and/or the channel information of the second reference signal may reflect the state of the current channel, the precoding of the first reference signal determined according to the receiving information and/or the channel information of the second reference signal may be matched with the state of the current channel, so that the first reference signal is processed by using the precoding and then transmitted, and the transmission performance of the first reference signal may be improved.

Wherein the second reference signal associated with one first reference signal can be configured by the base station through higher layer signaling. The base station may associate the identifier of the second reference signal with the identifier of the first reference signal in advance, and transmit the identifier of the second reference signal associated with the identifier of the first reference signal to the terminal.

Alternatively, the terminal may determine whether to determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal according to whether the second reference signal associated with the first reference signal is received in a specified time range. The designated time range may be a time range closer to the (n + k) th time unit, so that, on the one hand, the precoding determined according to the received information and/or channel information of the second reference signal associated with the first reference signal received in the time range may be matched with the channel state of the initial transmission time unit of the first reference signal; on the other hand, it can also be avoided that the terminal does not have enough time to determine the precoding of the first reference signal.

Considering that the terminal may receive a plurality of second reference signals associated with the first reference signal within the specified time range, in this embodiment of the application, optionally, the terminal may select one second reference signal from the plurality of received second reference signals associated with the first reference signal, and determine precoding of the first reference signal according to reception information and/or channel information of the selected second reference signal. Alternatively, the selected second reference signal may be the second reference signal closest to the n + k-th time unit, or the second reference signal closest to the nth time unit before the nth time unit, or the second reference signal closest to the nth time unit after the nth time unit.

Considering that the terminal may not receive the second reference signal associated with the first reference signal within the specified time range, the terminal may determine precoding of the first reference signal, perform precoding processing on the first reference signal with the determined precoding, and transmit the precoded first reference signal. In other implementations, for this case, the terminal may not transmit the first reference signal in the first uplink time unit satisfying n + k.

For example, determining the precoding of the first reference signal according to the received information and/or channel information of the second reference signal associated with the first reference signal received within the specified time range may include the following cases:

case 1: if the terminal receives the second reference signal associated with the first reference signal in the (n + k-T1) th time unit or the time unit between the time units, the terminal may determine precoding of the first reference signal according to the received information and/or channel information of the second reference signal associated with the first reference signal received in the time range. T1 is an integer not less than 0, and may be a value set by the terminal, a value predetermined by the base station and the terminal, or a value configured by the base station.

For example, if the resource ID (resource ID) of the CSI-RS associated with the SRS configured by the base station for the terminal is an associated CSI-RS resource ID, if the terminal receives the CSI-RS with the resource ID of the associated CSI-RS resource ID at slot n + k-T1 and before the slot n + k-T1, the terminal determines the precoding required by the SRS to use based on the received information and/or channel information of the CSI-RS with the resource ID of the associated CSI-RS resource ID received at slot n + k-T1 or before the slot n + k-T1.

Case 2: if the terminal receives the second reference signal associated with the first reference signal between the (n + k-T) 2 time unit and the (n + k-T1) time unit, the terminal may determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal associated with the first reference signal received in the time range. Wherein T2 is an integer not less than 0, T2 is greater than T1, and T2 may be a value set by the terminal, a value pre-agreed by the base station and the terminal, or a value configured by the base station.

Optionally, in some embodiments, after receiving a second reference signal associated with a first reference signal, the terminal may reserve the reception information and/or channel of the second reference signal for a period of time, so that when a subsequent base station sends a first reference signal trigger or activation signaling, the terminal may determine precoding of the first reference signal according to the saved information.

Further, after the terminal receives a new second reference signal associated with the first reference signal, the terminal may discard the reception information and/or channel information of the second reference signal that is previously retained, and retain the reception information and/or channel information of the newly received second reference signal.

Optionally, in other embodiments, after receiving the second reference signal associated with the first reference signal, the terminal may determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal, and reserve the precoding for a period of time, so that when a subsequent base station sends a first reference signal trigger or activation signaling, the terminal may perform precoding processing on the first reference signal according to the saved precoding.

Further, after the terminal receives a new second reference signal associated with the first reference signal, the terminal may discard the precoding of the first reference signal calculated based on the reception information and/or the channel information of the second reference signal, which is retained before, and retain the precoding of the first reference signal calculated according to the reception information and/or the channel information of the newly received second reference signal.

Optionally, on the basis of the foregoing embodiments, the first reference signal trigger or activation signaling sent by the base station may be used to instruct the terminal to send the first reference signal according to the resource configuration information of the first reference signal, and may also be used to instruct the terminal to receive the second reference signal associated with the first reference signal. The base station transmits a second reference signal associated with the first reference signal to the terminal starting at a start transmission time unit of the second reference signal associated with the first reference signal. Optionally, the initial sending time unit of the second reference signal is a first downlink time unit satisfying n + R, where R is an integer greater than or equal to R, and R is an integer greater than or equal to 0. In particular, R ═ 0. Accordingly, the terminal may receive the second reference signal associated with the first reference signal from the transmission start unit of the second reference signal, and may further determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal.

The first downlink time unit satisfying n + r may be a time unit in which the first reference signal may be transmitted in a time unit starting from the nth + r time unit. For example, if R ═ R, the first downlink time unit satisfying n + R may be the (n + R) th time unit (if the time unit is a downlink time unit), and if the (n + R) th time unit is not a downlink time unit, the subsequent first downlink time unit is the transmission time unit of the second reference signal.

Optionally, the starting transmission time unit of the second reference signal is the first downlink time unit with number n + R, where R ═ R1, and R1 is an integer greater than or equal to 0. In particular, R ═ 0. Accordingly, the terminal may receive the second reference signal associated with the first reference signal from the transmission start unit of the second reference signal, and may further determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal.

Optionally, the value of R (or R1) may be predetermined by the base station and the terminal. The value of R (or R1) may also be notified to the terminal by the base station through signaling.

Optionally, the base station may notify the terminal of the value of R (or R1) in the following manner:

mode 1: and the base station sends DCI to the terminal, wherein the DCI carries the value of the R (or R1). For example, the base station may be through DCI

A number of bits to indicate the value of R (or R1), where M is the predefined number of possible values of R (or R1).

Mode 2: and the base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the R (or R1). Wherein the higher layer signaling may comprise RRC signaling or MAC signaling. The embodiment of the present application does not limit the type of the high layer signaling.

Mode 3: the base station sends high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of the R (or R1), and the DCI carries one selected from the plurality of values to be takenThe value is obtained. For example, the base station configures M possible values of R (or R1) for the terminal through RRC signaling, and then configures the M possible values of R (or R1) through DCI

A bit to indicate the specific value of R (or R1).

Optionally, whether the base station triggers or activates transmission of the second reference signal associated with the first reference signal currently or previously, the base station may send a first reference signal trigger or activation signaling to instruct the terminal to send the first reference signal according to the resource configuration information of the first reference signal and instruct the terminal to receive the second reference signal associated with the first reference signal.

Optionally, in a case where the base station indicates the second reference signal associated with the first reference signal to the terminal, if the base station does not transmit the second reference signal associated with the first reference signal to the terminal within a set time range, the base station abandons decoding of the first reference signal. That is, the base station may not receive the first reference signal on the time-frequency resources that would otherwise be allocated to the first reference signal (i.e., the time-frequency resources that are supposed to be allocated to the first reference signal). Specifically, the base station may not allocate the time-frequency resource of the first reference signal to the terminal, or may not receive the first reference signal sent by the terminal on the time-frequency resource of the first reference signal even if the time-frequency resource of the first reference signal is allocated to the terminal.

Wherein the set time range may include one of the following ranges:

-one or a consecutive plurality of time units between the nth time unit and the n + k time units;

-time units preceding the n + k-X time units. The X may be a preset value, or a value indicated to the terminal by the base station through signaling, or a value predetermined by the base station and the terminal and determined based on a certain rule.

K1 may be a preset value, or a value indicated to the terminal by the base station through signaling, or a value pre-agreed by the base station and the terminal that may be determined based on a certain rule.

Optionally, a first reference signal trigger or activation signaling sent by the base station to the terminal may have different meanings in different cases, and in some cases, the first reference signal trigger or activation signaling is used to instruct the terminal to send the first reference signal according to the resource configuration information of the first reference signal, and in other cases, the first reference signal trigger or activation signaling is used to instruct the terminal to send the first reference signal according to the resource configuration information of the first reference signal and instruct the terminal to receive the second reference signal associated with the first reference signal.

In some embodiments, if the base station transmits the second reference signal associated with the first reference signal to the terminal in a time unit between the nth-T3 time unit and the n + T4 time unit, the first reference signal triggers or activates signaling only for instructing the terminal to transmit the first reference signal according to the resource configuration information of the first reference signal.

If the base station does not transmit the second reference signal associated with the first reference signal to the terminal for a time unit between the nth-T3 time unit and the n + T4 time unit, the first reference signal trigger or activation signaling is used not only to instruct the terminal to transmit the first reference signal according to the resource configuration information of the first reference signal, but also to instruct the terminal to receive the second reference signal associated with the first reference signal. And the base station starts to transmit a second reference signal associated with the first reference signal in the first downlink time unit meeting the n + r. Accordingly, the terminal starts to receive the second reference signal associated with the first reference signal in the first downlink time unit satisfying n + r, and may further determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal. Wherein R is more than or equal to R (or R1), T4 is more than or equal to R (or R1), T4 is more than or equal to 0, n-T3 is more than or equal to n + T4. As a specific example, T4 is 0.

In still other embodiments, if the base station transmits second reference signal trigger or activation signaling to the terminal for instructing the terminal to receive the second reference signal associated with the first reference signal in a time unit between the nth-T5 time unit and the n + T6 time unit, the first reference signal trigger or activation signaling is only for instructing the terminal to transmit the first reference signal according to the resource configuration information of the first reference signal.

If the base station does not transmit the second reference signal trigger or activation signaling to the terminal for a time unit between the nth-T5 time unit and the n + T6 time unit, the first reference signal trigger or activation signaling is used not only to instruct the terminal to transmit the first reference signal according to the resource configuration information of the first reference signal, but also to instruct the terminal to receive the second reference signal associated with the first reference signal. Accordingly, the terminal starts to receive the second reference signal associated with the first reference signal in the first downlink time unit satisfying n + r, and may further determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal. Wherein R is more than or equal to R (or R1), T6 is more than or equal to R (or R1), T6 is more than or equal to 0, n-T5 is more than or equal to n + T6. As a specific example, T6 is 0.

Optionally, on the basis of any of the foregoing embodiments of the present application, to avoid or reduce resource collision between signals, the terminal may send the first reference signal on part or all of the time-frequency resources of the first reference signal allocated to the terminal, for example, the following cases may be included:

case 1 a: and the terminal starts from the starting time unit of the first reference signal and transmits the first reference signal resource on the time frequency resource which is configured for the first reference signal and does not conflict with any other uplink signal. Taking the SRS as an example, if the time-frequency resource of the SRS does not collide with other uplink signals in the time-frequency resource starting from the starting time slot of the SRS, the terminal transmits the SRS in the time-frequency resource of the SRS.

Case 2 a: the terminal starts from a starting time unit of a first reference signal, and transmits a first reference signal resource on a time frequency resource which conflicts with a first uplink signal in time frequency resources configured for the first reference signal, wherein the priority of the first uplink signal is lower than that of the first reference signal. Taking the SRS as an example, if the time-frequency resource of the SRS collides with part or all of the time-frequency resources of other uplink signals from the time-frequency resource starting from the starting time slot of the SRS, but the SRS has a higher priority, the terminal transmits the SRS on the time-frequency resource of the SRS.

Case 3 a: the terminal does not send the first reference signal on a time frequency resource which is in conflict with a second uplink signal in the time frequency resources configured by the first reference signal from a starting time unit of the first reference signal, wherein the priority of the second uplink signal is higher than that of the first reference signal. Taking the SRS as an example, if the time-frequency resource of the SRS collides with part or all of the time-frequency resources of other uplink signals from the time-frequency resource starting from the starting time slot of the SRS, and the SRS has a lower priority, the terminal transmits the SRS on the SRS time-frequency resource where the collision does not occur, and does not transmit the SRS on the SRS resource where the collision occurs.

Accordingly, the base station may receive the first reference signal sent by the terminal on a part of or all of the time-frequency resources allocated for the first reference signal according to the resource collision condition between the signals, for example, the following conditions may be included:

case 1 b: the base station starts from a starting time unit of a first reference signal, and receives the first reference signal sent by a terminal on a time frequency resource which does not conflict with any other uplink signal in time frequency resources configured for the first reference signal;

case 2 b: the base station receives a first reference signal sent by a terminal from a starting time unit of the first reference signal on a time frequency resource which is configured for the first reference signal and conflicts with a first uplink signal, wherein the priority of the first uplink signal is lower than that of the first reference signal.

Case 3 b: the base station starts from a starting time unit of a first reference signal, and gives up the first reference signal sent by a receiving terminal on a time frequency resource which conflicts with a second uplink signal in time frequency resources configured for the first reference signal, wherein the priority of the second uplink signal is higher than that of the first reference signal.

Optionally, in this embodiment of the present application, the sending and receiving of the reference signal may also perform analog beamforming. Specifically, in some embodiments, the base station indicates to the terminal transmit beamforming information for the first reference signal and receive beamforming information for the second reference signal. The beamforming information may be implemented as a QCL (quadrature-beamforming) signal associated with a reference. For example, the first reference signal is an SRS signal, and the base station instructs SRS resource 2 of spatial QCL of an SRS resource (which is referred to as SRS resource 1) corresponding to the SRS signal, that is, instructs the terminal to perform SRS transmission using the same transmission beam as that of SRS resource 2. Optionally, when the base station indicates the terminal to send beamforming information of the first reference signal and receive beamforming information of the second reference signal, and the first reference signal is associated with the second reference signal, the terminal performs reception of the second reference signal using beamforming of the first reference signal indicated by the base station.

Referring to fig. 3, a schematic diagram of a transmission flow of a downlink reference signal provided in the embodiment of the present application is shown.

In this procedure, the first reference signal is a downlink reference signal, for example, the downlink reference signal may include CSI-RS. The second reference signal is an uplink reference signal, for example, the uplink reference signal may include an SRS. The embodiments of the present application do not limit the types of the first reference signal and the second reference signal.

The process may include:

s301: the base station sends a first reference signal trigger or activation signaling to the terminal.

Optionally, the base station may send the first reference signal trigger or activation signaling through DCI. Here, the "first reference signal trigger or activation signaling" is used to distinguish from the "second reference signal trigger or activation signaling", i.e., to partition two different signaling.

It should be noted that, in the embodiment of the present application, the naming manner of the "first reference signal trigger or activation signaling" and the "second reference signal trigger or activation signaling" is not limited.

Optionally, the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal. Specifically, the signaling may be used to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal.

Wherein the resource configuration information of the first reference signal may include a resource or a resource set of the first reference signal. The set of resources for the first reference signal may include one or more resources for the first reference signal, and the resource for one first reference signal may include one or more resource configuration parameters. For example, taking CSI-RS as an example, one CSI-RS resource set (CSI-RS resource set) may include one or more CSI-RS resource configurations, and one CSI-RS resource configuration may include the number of CSI-RS ports, a time domain type indication of CSI-RS, a period of CSI-RS, a time-frequency resource position of CSI-RS in one slot (slot), and the like. It should be noted that, in the embodiment of the present application, the triggering or activating signaling of the first reference signal may correspond to one triggering information to simultaneously trigger the transmission of multiple reference signals or one triggering information to trigger the transmission of only one reference signal, which is not limited in the embodiment of the present application.

The resource configuration information of the first reference signal may be configured by the base station.

In the embodiment of the present application, for convenience of description, a sending time unit of the first reference signal triggering or activating signaling is referred to as an nth time unit, where n may be a number of the time unit. The time units may be time slots, or other granularity of time units. Taking CSI-RS as an example, in S201, the base station sends a CSI-RS trigger or activation signaling to the terminal at slot n for one configured SRS resource or SRS resource set.

S302: the base station transmits a first reference signal to the terminal.

In this step, the base station may determine, according to the sending time unit of the first reference signal triggering or activating the signaling, the initial sending time unit of the first reference signal, that is, determine a timing relationship between the triggering time and the sending time of the first reference signal, and send the first reference signal according to the determined timing relationship and the resource configuration information of the first reference signal.

The initial sending time unit of the first reference signal is a first downlink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

The first downlink time unit satisfying n + k may be a time unit in which the first reference signal may be transmitted in a time unit starting from the (n + k) -th time unit. For example, if K is K, the first downlink time unit satisfying n + K may be the (n + K) th time unit (if the time unit is a downlink time unit), and if the (n + K) th time unit is not a downlink time unit, the next first downlink time unit capable of satisfying the downlink signal and the downlink channel priority specified by the protocol may be the transmission time unit of the first reference signal. Taking CSI-RS as an example, the first downlink timeslot from the (n + k) th timeslot backward satisfies the downlink signal and downlink channel priority specified by the protocol.

Optionally, the value of K or Z may be predetermined by the base station and the terminal. The value of K or Z may also be notified to the terminal by the base station through signaling.

Optionally, the base station may notify the value of K or Z to the terminal in the following manner:

mode 1: and the base station sends DCI to the terminal, wherein the DCI carries the value of the K or the Z. For example, the base station may be through DCI

A number of bits to indicate the value of K or Z, where M is a predefined number of possible values of K or Z.

Mode 2: and the base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the K or the Z. Wherein the higher layer signaling may comprise RRC signaling or MAC signaling. The embodiment of the present application does not limit the type of the high layer signaling.

Mode 3: and the base station sends a high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of the K, and the DCI carries a value selected from the plurality of values. For example, the base station configures M possible values of K for the terminal through RRC signaling, and then configures the M possible values of K through DCI

A bit to indicate a specific value of K.

The base station can configure the time sequence relationship between the triggering and sending of the first reference signal more flexibly by signaling the scheme of notifying the value of K or Z by the base station so as to adapt to different requirements.

S303: and the terminal receives the first reference signal sent by the base station according to the first reference signal triggering or activating signaling.

In this step, the terminal may determine, according to the sending time unit of the first reference signal triggering or activating the signaling, the sending time unit of the first reference signal or the receiving time unit of the first reference signal (the sending time unit of the first reference signal and the receiving time unit of the first reference signal are equivalent to each other), that is, determine a timing relationship between the triggering time and the sending time of the first reference signal, and receive the first reference signal sent by the base station according to the determined timing relationship and the resource configuration information of the first reference signal. The method for the terminal to determine the initial transmission time unit of the first reference signal is the same as the method adopted by the base station.

Optionally, on the basis of the foregoing embodiments, the base station may further receive a second reference signal associated with the first reference signal and sent by the terminal, where the second reference signal is an uplink reference signal. The base station may determine precoding of the first reference signal according to the reception information and/or the channel information of the second reference signal, perform precoding processing on the first reference signal with the determined precoding, and then transmit the precoded first reference signal. Since the receiving information and/or the channel information of the second reference signal may reflect the state of the current channel, the precoding of the first reference signal determined according to the receiving information and/or the channel information of the second reference signal may be matched with the state of the current channel, so that the first reference signal is processed by using the precoding and then transmitted, and the transmission performance of the first reference signal may be improved.

Alternatively, the base station may determine whether to determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal according to whether the second reference signal associated with the first reference signal is received in a specified time range. The designated time range may be a time range closer to the (n + k) th time unit, so that, on the one hand, the precoding determined according to the received information and/or channel information of the second reference signal associated with the first reference signal received in the time range may be matched with the channel state of the initial transmission time unit of the first reference signal; on the other hand, it can also be avoided that the terminal does not have enough time to determine the precoding of the first reference signal.

Considering that the base station may receive a plurality of second reference signals associated with the first reference signal within the specified time range, in this embodiment of the application, optionally, the base station may select one second reference signal from the plurality of received second reference signals associated with the first reference signal, and determine precoding of the first reference signal according to reception information and/or channel information of the selected second reference signal. Alternatively, the selected second reference signal may be the second reference signal closest to the n + k-th time unit, or the second reference signal closest to the nth time unit before the nth time unit, or the second reference signal closest to the nth time unit after the nth time unit.

Considering that the base station may not receive the second reference signal associated with the first reference signal within the specified time range, the base station may determine precoding of the first reference signal, perform precoding processing on the first reference signal with the determined precoding, and transmit the precoded first reference signal. In other implementations, for this case, the base station may not transmit the first reference signal in the first downlink time unit satisfying n + k.

case 1: if the base station receives the second reference signal associated with the first reference signal in the (n + k-T1) th time unit or the time unit between the time units, the base station may determine precoding of the first reference signal according to the received information and/or channel information of the second reference signal associated with the first reference signal received in the time range. T1 is an integer not less than 0, and may specifically be a value configured by the base station, or may be a value predetermined by the base station and the terminal.

Case 2: if the base station receives the second reference signal associated with the first reference signal between the (n + k-T) 1 time unit and the (n + k-T) 1 time unit, the base station may determine precoding of the first reference signal based on the received information and/or channel information of the second reference signal associated with the first reference signal received over the time range. Wherein, T2 is an integer not less than 0, T2 is greater than T1, and T2 may be a value agreed in advance by the base station and the terminal, or a value configured by the base station.

Optionally, in some embodiments, after receiving the second reference signal associated with the first reference signal, the base station may reserve the reception information and/or the channel of the second reference signal for a period of time, so that the precoding of the first reference signal may be determined according to the saved information.

Further, when the base station receives a new second reference signal associated with the first reference signal, the previously retained reception information and/or channel information of the second reference signal may be discarded, and the newly received reception information and/or channel information of the second reference signal may be retained.

Optionally, in other embodiments, after receiving the second reference signal associated with the first reference signal, the base station may determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal, and reserve the precoding for a period of time, so that the first reference signal may be precoded according to the saved precoding later.

Further, after the base station receives a new second reference signal associated with the first reference signal, the base station may discard the precoding of the first reference signal calculated based on the reception information and/or the channel information of the second reference signal, which is retained before, and retain the precoding of the first reference signal calculated based on the reception information and/or the channel information of the newly received second reference signal.

Alternatively, if the base station receives the second reference signal associated with the first reference signal between the (n + k-T) 2 time unit and the (n + k-T) 1 time unit, the base station starts to transmit the first reference signal to the terminal at the initial transmission time unit of the first reference signal; otherwise, the base station may not transmit the first reference signal on the time-frequency resource of the first reference signal, i.e., the base station may not allocate the time-frequency resource for the first reference signal.

Optionally, on the basis of the foregoing embodiments, the first reference signal trigger or activation signaling sent by the base station may be used to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal, and may also be used to instruct the terminal to send a second reference signal associated with the first reference signal. The terminal transmits a second reference signal associated with the first reference signal to the base station starting at a start transmission time unit of the second reference signal associated with the first reference signal. Optionally, the starting transmission time unit of the second reference signal is a first uplink time unit satisfying a number n + R, where R is an integer greater than or equal to R or R ═ X, where R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0. In particular, R ═ 0. Accordingly, the base station may receive the second reference signal associated with the first reference signal from the transmission start unit of the second reference signal, and may further determine precoding of the first reference signal according to reception information and/or channel information of the second reference signal.

The first uplink time unit satisfying n + r may be a time unit in which the first reference signal may be transmitted in the time units starting from the nth + r time unit and going backward. For example, if R is equal to R, the first uplink time unit satisfying n + R may be the (n + R) -th time unit (if the time unit is an uplink time unit), and if the (n + R) -th time unit is not an uplink time unit, the first uplink time unit that can satisfy the uplink signal and the uplink channel priority specified by the protocol is the transmission time unit of the second reference signal.

Optionally, the value of R or X may be predetermined by the base station and the terminal. The value of R or X may also be notified to the terminal by the base station through signaling.

Optionally, the base station may notify the terminal of the value of R or X in the following manner:

mode 1: and the base station sends DCI to the terminal, wherein the DCI carries the value of the R or the X. For example, the base station may be through DCI

A number of bits to indicate the value of R, where M is a predefined number of possible values of R or X.

Mode 2: and the base station sends a high-level signaling to the terminal, wherein the high-level signaling carries the value of the R or the X. Wherein the higher layer signaling may comprise RRC signaling or MAC signaling. The embodiment of the present application does not limit the type of the high layer signaling.

Mode 3: and the base station sends a high-level signaling and DCI to the terminal, wherein the high-level signaling carries a plurality of values of the R or the X, and the DCI carries a value selected from the plurality of values. For example, the base station configures M possible values of R or X for the terminal through RRC signaling, and then configures the M possible values of R or X through DCI

A bit to indicate the specific value of R or X.

Optionally, whether the terminal triggers or activates transmission of the second reference signal associated with the first reference signal currently or previously, the base station may send a first reference signal trigger or activation signaling to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal and instruct the terminal to send the second reference signal associated with the first reference signal.

Optionally, a first reference signal trigger or activation signaling sent by the base station to the terminal may have different meanings in different cases, and in some cases, the first reference signal trigger or activation signaling is used to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal, and in other cases, the first reference signal trigger or activation signaling is used to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal and instruct the terminal to send a second reference signal associated with the first reference signal.

In some embodiments, if the terminal transmits the second reference signal associated with the first reference signal to the base station in a time unit between the nth-T3 time unit and the n + T4 time unit, the first reference signal triggers or activates signaling only to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal.

If the terminal does not transmit the second reference signal associated with the first reference signal to the base station in a time unit between the nth-T3 time unit and the n + T4 time unit, the first reference signal trigger or activation signaling is used not only to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal, but also to instruct the terminal to transmit the second reference signal associated with the first reference signal. And the terminal starts to transmit a second reference signal associated with the first reference signal in the first uplink time unit meeting the n + r. Accordingly, the base station starts to receive the second reference signal associated with the first reference signal in the first uplink time unit satisfying n + r, and may further determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal. Wherein R is more than or equal to R, T4 is more than or equal to R, T4 is more than or equal to 0, n-T3 is more than or equal to n + T4. As a specific example, T4 is 0.

In still other embodiments, if the base station transmits second reference signal trigger or activation signaling to the terminal for instructing the terminal to transmit a second reference signal associated with the first reference signal in a time unit between the nth-T5 time unit and the n + T6 time unit, the first reference signal trigger or activation signaling is only for instructing the terminal to receive the first reference signal according to the resource configuration information of the first reference signal.

If the base station does not transmit the second reference signal trigger or activation signaling to the terminal for a time unit between the nth-T5 time unit and the n + T6 time unit, the first reference signal trigger or activation signaling is used not only to instruct the terminal to receive the first reference signal according to the resource configuration information of the first reference signal, but also to instruct the terminal to transmit the second reference signal associated with the first reference signal. Accordingly, the base station starts to receive the second reference signal associated with the first reference signal in the first uplink time unit satisfying n + r, and may further determine precoding of the first reference signal according to the reception information and/or channel information of the second reference signal. Wherein R is more than or equal to R, T6 is more than or equal to R, T6 is more than or equal to 0, n-T5 is more than or equal to n + T6. As a specific example, T6 is 0.

Optionally, on the basis of any of the foregoing embodiments of the present application, to avoid or reduce resource collision between signals, the base station may send the first reference signal on part or all of time-frequency resources of the first reference signal, for example, the following cases may be included:

case 1 a: the base station starts from the starting time unit of the first reference signal, and transmits the first reference signal resource on the time frequency resource which is configured for the first reference signal and does not conflict with any other uplink signal.

Case 2 a: the base station starts from a starting time unit of a first reference signal, and transmits the first reference signal resource on a time frequency resource which conflicts with a first uplink signal in time frequency resources configured for the first reference signal, wherein the priority of the first uplink signal is lower than that of the first reference signal.

Case 3 a: the base station does not send the first reference signal on the time frequency resource which is in conflict with the second uplink signal in the time frequency resources configured by the first reference signal from the starting time unit of the first reference signal, wherein the priority of the second uplink signal is higher than that of the first reference signal.

Accordingly, the terminal may receive the first reference signal sent by the base station on a part of or all of the time-frequency resources allocated for the first reference signal according to the resource collision condition between the signals, for example, the following conditions may be included:

case 1 b: the terminal receives a first reference signal sent by a base station on a time frequency resource which does not conflict with any other uplink signal in the time frequency resources configured for the first reference signal from a starting time unit of the first reference signal;

case 2 b: the terminal receives a first reference signal sent by a base station on a time frequency resource which conflicts with a first uplink signal in time frequency resources configured for the first reference signal from a starting time unit of the first reference signal, wherein the priority of the first uplink signal is lower than that of the first reference signal.

Case 3 b: the terminal abandons and receives the first reference signal sent by the base station on the time frequency resource which is in conflict with the second uplink signal in the time frequency resources configured for the first reference signal from the starting time unit of the first reference signal, wherein the priority of the second uplink signal is higher than that of the first reference signal.

Optionally, in this embodiment of the present application, the sending and receiving of the reference signal may also perform analog beamforming. Specifically, in some embodiments, the base station indicates to the terminal receive beamforming information for the first reference signal and transmit beamforming information for the second reference signal. The beamforming information may be implemented in indicating QCL signals associated with a reference. For example, the first reference signal is a CSI-RS signal, and the base station indicates a CSI-RS resource 2 of a CSI-RS resource (denoted as CSI-RS resource 1) space QCL corresponding to the CSI-RS signal, that is, indicates the terminal to use the same transmission beam as the CSI-RS resource 2 for SRS transmission. Optionally, when the base station indicates the receiving beamforming information of the first reference signal and the transmitting beamforming information of the second reference signal to the terminal, and the first reference signal is associated with the second reference signal, the terminal transmits the second reference signal by using the receiving beamforming information of the first reference signal indicated by the base station.

Based on the same technical concept, the embodiment of the present application further provides a base station, which can implement transmission of uplink reference signals in the above embodiments.

Referring to fig. 4, which is a schematic structural diagram of the base station, the base station may include: a sending module 401 and a receiving module 402.

The sending module 401 is configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to send a first reference signal according to resource configuration information of the first reference signal;

a receiving module 402 is configured to receive a first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

The functions of the above modules of the apparatus can be referred to the related description of the foregoing uplink reference signal transmission embodiment, and are not repeated here.

Based on the same technical concept, the embodiment of the present application further provides a terminal, which can implement transmission of the uplink reference signal in the above embodiments.

Referring to fig. 5, the terminal may include a receiving module 501 and a transmitting module 502 for a schematic structural diagram of the terminal.

The receiving module 501 is configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct the terminal to send a first reference signal according to resource configuration information of the first reference signal;

a sending module 502 is configured to send a first reference signal to the base station according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

Based on the same technical concept, the embodiment of the present application further provides a base station, which can implement transmission of downlink reference signals in the above embodiments.

Referring to fig. 6, which is a schematic structural diagram of the base station, the base station may include: a sending module 601 and a receiving module 602.

The sending module 601 is configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal;

the receiving module 602 is configured to send a first reference signal according to the resource configuration information of the first reference signal; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

The functions of the above modules of the apparatus can be referred to the related description of the foregoing downlink reference signal transmission embodiment, and are not repeated here.

Based on the same technical concept, the embodiment of the present application further provides a terminal, which can implement transmission of downlink reference signals in the above embodiments.

Referring to fig. 7, which is a schematic structural diagram of the terminal, the terminal may include: a receiving module 701 and a sending module 702.

A receiving module 701, configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal according to resource configuration information of the first reference signal;

the sending module 702 is configured to trigger or activate a signaling according to the first reference signal to receive the first reference signal; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

Referring to fig. 8, a schematic structural diagram of a base station provided in the embodiment of the present application is shown, where the base station may include: a processor 801, a memory 802, a transceiver 803, and a bus interface.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations. The transceiver 803 is used for receiving and transmitting data under the control of the processor 801.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 801, and various circuits, represented by the memory 802, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 may store data used by the processor 801 in performing operations.

The processes disclosed in the embodiments of the present invention can be applied to the processor 801 or implemented by the processor 801. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The processor 801 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 801 is configured to read a program in the memory 802 and execute the uplink reference signal transmission procedure or the downlink reference signal transmission procedure implemented on the base station side, or execute the uplink reference signal transmission procedure and the downlink reference signal transmission procedure.

Referring to fig. 9, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown, where the terminal may include: a processor 901, a memory 902, a transceiver 903, and a bus interface.

The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.

The process disclosed in the embodiment of the present invention may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 901 is configured to read a program in the memory 902 and execute the uplink reference signal transmission procedure or the downlink reference signal transmission procedure implemented on the terminal side, or execute the uplink reference signal transmission procedure and the downlink reference signal transmission procedure.

Claims

1. A method for reference signal transmission, the method comprising:

a base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send a first reference signal according to resource configuration information of the first reference signal and indicating the terminal to receive a second reference signal associated with the first reference signal;

the base station receives the first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

and the base station transmits a second reference signal associated with the first reference signal to the terminal, wherein an initial transmission time unit of the second reference signal is a first downlink time unit with a number of n + R, R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

2. The method of claim 1, wherein the value of R or X is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of R or X through signaling.

3. The method of claim 1, wherein the method further comprises:

4. The method of claim 1, wherein the method further comprises:

and if the base station does not send a second reference signal associated with the first reference signal to the terminal within a set time range, the base station abandons decoding the first reference signal.

5. The method of claim 1, wherein the value of K or Z is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of K or Z through signaling.

6. A method for reference signal transmission, the method comprising:

a terminal receives a first reference signal trigger or activation signaling sent by a base station, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send a first reference signal according to resource configuration information of the first reference signal and indicating the terminal to receive a second reference signal associated with the first reference signal;

the terminal sends the first reference signal to the base station according to the first reference signal triggering or activating signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

the terminal receives a second reference signal associated with the first reference signal, which is sent by the base station, according to the first reference signal triggering or activating signaling, where an initial sending time unit of the second reference signal is a first downlink time unit satisfying the number n + R, where R is an integer greater than or equal to R or R-X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

7. The method of claim 6, wherein the value of R or X is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of R or X through signaling.

8. The method of claim 6, wherein the method further comprises:

the terminal sending the first reference signal to the base station, including:

and the terminal sends the precoded first reference signal to the base station.

9. The method of any one of claims 6 to 8, wherein the receiving a second reference signal transmitted by the base station in association with the first reference signal comprises:

10. The method of claim 6, wherein the value of K or Z is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of K or Z through signaling.

11. A method for reference signal transmission, the method comprising:

a terminal receives a second reference signal which is sent by a base station and is associated with a first reference signal, and determines the precoding of the first reference signal according to the receiving information and/or channel information of the second reference signal; wherein the second reference signal is associated with the first reference signal;

the terminal receives a first reference signal trigger or activation signaling sent by a base station, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to send the first reference signal according to the resource configuration information of the first reference signal;

the terminal triggers or activates a signaling according to the first reference signal, and sends the first reference signal which is precoded according to the precoding to the base station; the starting sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

12. The method of claim 11, wherein the terminal determines precoding of the first reference signal according to the received reception information and/or channel information of the second reference signal transmitted by the base station, and comprises:

13. The method of claim 12, wherein the terminal determines precoding of the first reference signal according to reception information and/or channel information of a second reference signal associated with the first reference signal received in a specified time range, comprising:

14. A method for reference signal transmission, the method comprising:

a base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to receive a first reference signal and is used for indicating the terminal to send a second reference signal associated with the first reference signal;

the base station sends the first reference signal according to the resource configuration information of the first reference signal; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

the base station receives a second reference signal associated with the first reference signal, which is sent by the terminal, according to the first reference signal triggering or activating signaling, wherein an initial sending time unit of the second reference signal is a first downlink time unit which satisfies the number n + R, R is an integer greater than or equal to R or R-X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

15. The method of claim 14, wherein the value of R or X is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of R or X through signaling.

16. The method of claim 14, wherein the method further comprises:

17. The method of claim 14, wherein the method further comprises:

18. The method of claim 14, wherein the value of K or Z is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of K or Z through signaling.

19. A method for reference signal transmission, the method comprising:

a base station receives a second reference signal which is sent by a terminal and is related to a first reference signal, and determines the precoding of the first reference signal according to the receiving information and/or channel information of the second reference signal;

the base station sends a first reference signal trigger or activation signaling to a terminal, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to receive the first reference signal;

the base station sends a first reference signal which is precoded according to the precoding according to the resource configuration information of the first reference signal; the starting sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0.

20. The method of claim 19, wherein the determining, by the base station, precoding of the first reference signal according to the received reception information and/or channel information of the second reference signal transmitted by the terminal comprises:

and the base station determines the precoding of the first reference signal according to the received information and/or the channel information of the second reference signal received in the appointed time range.

21. The method of claim 19, wherein the base station determines precoding of the first reference signal based on reception information and/or channel information of a second reference signal associated with the first reference signal received at a specified time range, comprising:

if the base station receives a plurality of second reference signals associated with the first reference signal in the designated time range, selecting a second reference signal with a receiving time unit closest to the nth + k time units from the plurality of second reference signals, or selecting a second reference signal with a receiving time unit closest to the nth time unit, or selecting a second reference signal with a receiving time unit after the nth time unit and closest to the nth time unit; wherein the nth time unit is a receiving unit for triggering or activating signaling by the first reference signal;

22. A method for reference signal transmission, the method comprising:

a terminal receives a first reference signal trigger or activation signaling sent by a base station, wherein the first reference signal trigger or activation signaling is used for indicating the terminal to receive a first reference signal according to resource configuration information of the first reference signal and indicating the terminal to send a second reference signal associated with the first reference signal;

the terminal receives a first reference signal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

23. The method of claim 22, wherein the value of R or X is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of R or X through signaling.

24. The method of claim 22, wherein the method further comprises:

25. The method of claim 22, wherein the value of K or Z is pre-agreed by the base station and the terminal; or the base station informs the terminal of the value of K or Z through signaling.

26. A base station, comprising:

a first sending module, configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to send a first reference signal according to resource configuration information of the first reference signal, and is used to instruct the terminal to receive a second reference signal associated with the first reference signal;

a receiving module, configured to receive the first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

a second sending module, configured to send a second reference signal associated with the first reference signal to the terminal, where an initial sending time unit of the second reference signal is a first downlink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

27. A terminal, comprising:

a first receiving module, configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct a terminal to send a first reference signal according to resource configuration information of the first reference signal, and is used to instruct the terminal to receive a second reference signal associated with the first reference signal;

a sending module, configured to send the first reference signal to the base station according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

a second receiving module, configured to receive, according to the first reference signal trigger or the activation signaling, a second reference signal that is sent by the base station and is associated with the first reference signal, where an initial sending time unit of the second reference signal is a first downlink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

28. A base station, comprising:

a sending module, configured to send a first reference signal trigger or activation signaling to a terminal, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal and is used to instruct the terminal to send a second reference signal associated with the first reference signal;

a first receiving module, configured to send the first reference signal according to the resource configuration information of the first reference signal; wherein the initial transmission time unit of the first reference signal is a first uplink time unit satisfying a number n + K, where n is used to identify a transmission time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0

A second receiving module, configured to receive, according to the first reference signal trigger or activation signaling, a second reference signal that is sent by the terminal and is associated with the first reference signal, where an initial sending time unit of the second reference signal is a first uplink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

29. A terminal, comprising:

a receiving module, configured to receive a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive a first reference signal according to resource configuration information of the first reference signal, and to instruct the terminal to send a second reference signal associated with the first reference signal;

a first sending module, configured to send a first reference signal according to the first reference signal trigger or activation signaling; wherein the initial transmission time unit of the first reference signal is a first uplink time unit satisfying a number n + K, where n is used to identify a transmission time unit number of the first reference signal trigger or activation signaling, K is an integer greater than or equal to K or K ═ Z, where K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0

30. A base station, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is used for reading the program in the memory and executing:

sending a first reference signal trigger or activation signaling to a terminal through the transceiver, wherein the first reference signal trigger or activation signaling is used for instructing the terminal to send a first reference signal according to resource configuration information of the first reference signal and instructing the terminal to receive a second reference signal associated with the first reference signal;

receiving, by the transceiver, the first reference signal sent by the terminal according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

and transmitting a second reference signal associated with the first reference signal to the terminal through the transceiver, wherein a starting transmission time unit of the second reference signal is a first downlink time unit with a number of n + R, R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

31. A terminal, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is used for reading the program in the memory and executing:

receiving, by the transceiver, a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct the terminal to send a first reference signal according to resource configuration information of the first reference signal, and is used to instruct the terminal to receive a second reference signal associated with the first reference signal;

sending the first reference signal to the base station through the transceiver according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

receiving, by the transceiver, a second reference signal associated with the first reference signal and sent by the base station according to the first reference signal trigger or activation signaling, where an initial sending time unit of the second reference signal is a first downlink time unit that satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

32. A base station, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is used for reading the program in the memory and executing:

sending a first reference signal trigger or activation signaling with the transceiver to a terminal, the first reference signal trigger or activation signaling being used for instructing the terminal to receive the first reference signal and instructing the terminal to send a second reference signal associated with the first reference signal;

transmitting a first reference signal through the transceiver according to the resource configuration information of the first reference signal; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

and receiving, by the transceiver, a second reference signal associated with the first reference signal and sent by the terminal according to the first reference signal trigger or activation signaling, where an initial sending time unit of the second reference signal is a first uplink time unit which satisfies a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.

33. A terminal, comprising: the system comprises a processor, a memory and a transceiver, wherein the processor, the memory and the transceiver are connected through a bus; the processor is used for reading the program in the memory and executing:

receiving, by the transceiver, a first reference signal trigger or activation signaling sent by a base station, where the first reference signal trigger or activation signaling is used to instruct the terminal to receive the first reference signal according to resource configuration information of the first reference signal, and is used to instruct the terminal to send a second reference signal associated with the first reference signal;

sending the first reference signal by the transceiver according to the first reference signal trigger or activation signaling; the initial sending time unit of the first reference signal is a first uplink time unit with a number of n + K, where n is used to identify a sending time unit number of the first reference signal triggering or activating signaling, K is an integer greater than or equal to K or K ═ Z, K is an integer greater than or equal to 0, and Z is an integer greater than or equal to 0;

transmitting, by the transceiver, a second reference signal associated with the first reference signal to the base station, where a starting transmission time unit of the second reference signal is a first uplink time unit satisfying a number n + R, where R is an integer greater than or equal to R or R ═ X, R is an integer greater than or equal to 0, and X is an integer greater than or equal to 0.