CN106559277A

CN106559277A - The sending method and device of detection reference signal, signaling configuration method and device

Info

Publication number: CN106559277A
Application number: CN201510623239.9A
Authority: CN
Inventors: 弓宇宏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-09-25
Filing date: 2015-09-25
Publication date: 2017-04-05
Also published as: WO2017050155A1

Abstract

The invention provides the sending method and device of a kind of detection reference signal, signaling configuration method and device, wherein, the method, including：Detection reference signal SRS is sent on N number of antenna subset according to predefined rule, wherein, N is positive integer, and an antenna is included at least in each antenna subset；Send when different at least two antenna subsets of the SRS in N number of antenna subset.By the present invention, cannot support in solving the problems, such as correlation technique that the SRS between multiple antennas more than multiple antennas especially two antennas switches and send.

Description

Method and device for sending sounding reference signal and method and device for configuring signaling

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for sending a sounding reference signal, and a method and an apparatus for configuring signaling.

Background

In Long Term Evolution (Long Term Evolution, abbreviated as LTE), Sounding Reference Signal (SRS) is mainly used for measuring uplink channel quality.

In the frequency domain, SRS transmission needs to cover the frequency band of interest in the frequency domain, which can be achieved by two ways: one is by transmitting a sufficiently large wideband SRS to cover the entire frequency band; another approach is to transmit multiple narrowband SRSs, frequency hop in the frequency domain, and then combine a series of transmitted SRSs to cover the entire bandwidth.

In the same SRS bandwidth, multiple users may transmit the SRS through code division multiplexing on the same frequency comb (comb) by using different Cyclic Shifts (CS), or may transmit the SRS through frequency division multiplexing on different frequency combs. Specifically, in the LTE system, since there are 8 users who transmit SRS in a certain SRS bandwidth (usually, an integer multiple of 4 physical resource blocks), and the number of available spectrum combs is 2, the users have 16 resources available for transmitting SRS in total. These resources are sufficient for Single Input Single Output (SISO) or Single Input Multiple Output (SIMO), but may face the SRS resource shortage problem caused by Multiple antennas for MIMO. The LTE supports that two antenna users transmit the SRS by utilizing an antenna selection function, namely, the SRS is switched and transmitted by the two antennas, namely, the SRS is transmitted on only one antenna at the same time for the specified SRS bandwidth, the two antennas transmit the SRS in turn, and the detection of the channel quality information of the SRS of the two antennas is completed. The LTE-A introduces the aperiodic SRS in the R10 stage, the aperiodic SRS improves the flexible configuration and the effective utilization of the SRS resource by a dynamic triggering mode, but the SRS resource capacity is not improved fundamentally. With the introduction of a large-scale Multiple Input Multiple Output (masivemimo) technology, SRS resource capacity is challenged again.

In a Time Division Duplex (TDD) system, a base station can also directly obtain quality information of a downlink channel through SRS measurement because the uplink and downlink physical channels have reciprocity. Therefore, excessive feedback overhead of users can be avoided, and the downlink data transmission quality and capability of the base station are improved. However, although the downlink already supports the situation of multi-transmission and four-reception, at present, the uplink only supports SRS switching transmission between two antennas of a user, and when the number of downlink receiving antennas is not equal to the number of uplink transmitting antennas, the base station cannot obtain all downlink channel state information through SRS sounding.

In view of the above problems in the related art, no effective solution exists at present.

Disclosure of Invention

The invention provides a method and a device for sending a sounding reference signal, and a method and a device for configuring signaling, which are used for at least solving the problem that SRS switching sending between multiple antennas, especially between multiple antennas above two antennas, cannot be supported in the related art.

According to an aspect of the present invention, there is provided a method for transmitting a sounding reference signal, including: sending Sounding Reference Signals (SRS) on N antenna subsets according to a predefined rule, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

Further, the predefined rules include: when the frequency hopping function of the SRS is not enabled, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

further, the predefined rules include: when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N; or,

further, the predefined rules include: when the frequency hopping function of the SRS enables and allows the frequency hopping of the number K of the sub-bands to be even and K to be integral multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

further, the predefined rules include: when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

further, the predefined rules include: transmitting a periodic SRS over the N subsets of antennas.

Further, the predefined rules include: and transmitting the aperiodic SRS over the N antenna subsets, wherein triggering the aperiodic SRS transmission N times at a time is supported.

Further, the N aperiodic SRS transmissions are respectively transmitted over N consecutive uplink transmission symbols in the special subframe.

Further, before transmitting sounding reference signals on the N antenna subsets according to the predefined rule, the method further includes: dividing the transmit antennas into the N antenna subsets.

Further, before transmitting sounding reference signals on the N antenna subsets according to the predefined rule, the method further includes: and receiving signaling of a base station side, wherein the signaling is used for indicating the SRS to be transmitted on the N antenna subsets according to the predefined rule.

Further, the predefined rules include: and determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS.

Further, in case the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

Further, N is 4, and there is one antenna in each antenna subset.

Further, the predefined rules include: and selecting an antenna subset corresponding to the optimal downlink channel to transmit the SRS according to the downlink channel state information.

According to another aspect of the present invention, there is provided a method for signaling configuration of a sounding reference signal, including: sending signaling for instructing a terminal to send Sounding Reference Signals (SRS) on N antenna subsets of the terminal according to a predefined rule to the terminal, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

Further, the predefined rules include: when the frequency hopping function of the SRS is not enabled, the transmitting antenna subset index a (n) where the Nth SRS is transmitted is_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

a(n_SRS)＝n_SRSmod N; or,

or,

Further, sending signaling to a terminal for instructing the terminal to send sounding reference signals, SRSs, on N antenna subsets of the terminal according to a predefined rule comprises: and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating whether the SRS is sent on the N antenna subsets of the terminal according to the predefined rule or not.

Further, sending signaling to a terminal for instructing the terminal to send sounding reference signals, SRSs, on N antenna subsets of the terminal according to a predefined rule comprises: and reusing an antenna selection function in the existing protocol for indicating whether to start the SRS on the two antennas to the terminal, wherein the antenna selection function is used for indicating whether to transmit the SRS on N antenna subsets of the terminal according to the predefined rule to the terminal.

Further, sending signaling to a terminal for instructing the terminal to send sounding reference signals, SRSs, on N antenna subsets of the terminal according to a predefined rule comprises: and sending 2-bit high-layer signaling to the terminal, wherein the 2-bit high-layer signaling indicates whether the SRS is sent on the N antenna subsets of the terminal according to the predefined rule and the adopted predefined rule to the terminal.

Further, sending signaling to a terminal for instructing the terminal to send sounding reference signals, SRSs, on N antenna subsets of the terminal according to a predefined rule comprises: and sending 1-bit high-level signaling to the terminal, wherein the 1-bit high-level signaling is used for indicating a predefined rule adopted by the SRS to be sent on the N antenna subsets to the terminal.

Further, transmitting 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating whether to enable the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule; if the 1-bit high-level signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule, reusing the existing 1-bit physical layer signaling for triggering the aperiodic SRS transmission to perform continuous N times of transmission on the effective SRS resources; wherein the valid SRS resources refer to SRS resources that can be used to transmit the aperiodic SRS. .

According to still another aspect of the present invention, there is provided a sounding reference signal transmission apparatus, including: a first transmitting module, configured to transmit sounding reference signals SRS on N antenna subsets according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

a(n_SRS)＝n_SRSmod N。

a(n_SRS)＝n_SRSmod N; or,

or,

Further, before transmitting sounding reference signals on the N antenna subsets according to the predefined rule, the apparatus further includes: a dividing module for dividing the transmit antennas into the N antenna subsets.

Further, N is 4, and there is one antenna in each antenna subset.

According to another aspect of the present invention, there is provided a sounding reference signal signaling configuration apparatus, including: a second sending module, configured to send, to a terminal, a signaling for instructing the terminal to send sounding reference signals SRS on N antenna subsets of the terminal according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

a(n_SRS)＝n_SRSmod N。

a(n_SRS)＝n_SRSmod N; or,

further, the predefined rules include: a frequency hopping function is enabled in the SRS andwhen the number of subbands allowing frequency hopping, K, is even and K is an integer multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

Further, the second sending module further includes: a first sending unit, configured to send 1-bit high layer signaling to the terminal, where the 1-bit high layer signaling is used to indicate to the terminal whether to send the SRS on the N antenna subsets of the terminal according to the predefined rule.

Further, the second sending module further includes: a first reusing unit, configured to reuse an antenna selection function in an existing protocol, which is used to indicate to the terminal whether to turn on SRS on two antennas, where the antenna selection function is used to indicate to the terminal whether to transmit SRS on N antenna subsets of the terminal according to the predefined rule.

Further, the second sending module further includes: and a second sending unit, configured to send a 2-bit high layer signaling to the terminal, where the 2-bit high layer signaling indicates to the terminal whether to send the SRS on the N antenna subsets of the terminal according to the predefined rule and the adopted predefined rule.

Further, the second sending module further includes: a third sending unit, configured to send 1-bit high layer signaling to the terminal, where the 1-bit high layer signaling is used to indicate, to the terminal, a predefined rule adopted for sending the SRS over the N antenna subsets.

Further, the second sending module further includes: a fourth sending unit, configured to send 1-bit high-level signaling to the terminal, where the 1-bit high-level signaling is used to indicate to the terminal whether to enable aperiodic sounding reference signals to be sent on the N antenna subsets according to a predefined rule; a second reusing unit, configured to reuse an existing 1-bit physical layer signaling for triggering aperiodic SRS transmission for triggering the aperiodic SRS to perform consecutive N times of transmissions on an effective SRS resource if the 1-bit high layer signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule; wherein the valid SRS resources refer to SRS resources that can be used to transmit the aperiodic SRS. .

According to the invention, the method that the antennas of the terminal are divided into N antenna subsets, each antenna subset at least comprises one antenna, and then the sounding reference signal SRS is transmitted on the N antenna subsets according to the predefined rule is adopted, wherein the SRS is transmitted on at least two antenna subsets in the N antenna subsets at different times, so that the problem that switching transmission of the SRS between multiple antennas, especially between multiple antennas above two antennas, cannot be supported in the related art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a method of transmitting a sounding reference signal according to an embodiment of the present invention;

fig. 2 is a flowchart of a signaling configuration method of a sounding reference signal according to an embodiment of the present invention;

fig. 3 is a block diagram of a transmitting apparatus of a sounding reference signal according to an embodiment of the present invention;

fig. 4 is a block diagram of a signaling configuration apparatus for sounding reference signals according to an embodiment of the present invention;

FIG. 5A is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 2 according to an embodiment of the invention;

FIG. 5B is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to an embodiment of the invention;

FIG. 5C is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to an embodiment of the invention;

FIG. 5D is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 6 according to an embodiment of the invention;

FIG. 6A is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 2 according to a second embodiment of the invention;

FIG. 6B is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to a second embodiment of the invention;

FIG. 6C is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to a second embodiment of the invention;

FIG. 6D is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 6 according to a second embodiment of the invention;

FIG. 7A is a diagram of a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 2 according to a third embodiment of the invention;

FIG. 7B is a diagram of a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to a third embodiment of the invention;

FIG. 7C is a diagram of a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to a third embodiment of the invention;

FIG. 7D is a diagram of a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 6 according to a third embodiment of the invention;

FIG. 8A is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 2 according to an embodiment of the invention;

FIG. 8B is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to an embodiment of the invention;

FIG. 8C is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to an embodiment of the invention;

FIG. 8D is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 6 according to an embodiment of the invention;

FIG. 9A is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 2 according to an embodiment of the invention;

FIG. 9B is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to an embodiment of the invention;

FIG. 9C is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to an embodiment of the invention;

FIG. 9D is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 6 according to an embodiment of the invention;

fig. 10A is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping subbands is 2 according to an embodiment of the present invention;

FIG. 10B is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 3 according to an embodiment of the invention;

FIG. 10C is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping sub-bands is 4 according to an embodiment of the invention;

fig. 10D is a diagram illustrating a four-antenna SRS transmission method when the number of SRS hopping subbands is 6 according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In the present embodiment, a method for sending a sounding reference signal is provided, and fig. 1 is a flowchart of the method for sending a sounding reference signal according to the embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, a terminal sends sounding reference signals SRS on N antenna subsets according to a predefined rule, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

As can be seen from step S102, the antennas of the terminal are divided into N antenna subsets, each antenna subset includes at least one antenna, and then sounding reference signals SRS are transmitted on the N antenna subsets according to a predefined rule, where the SRS is not transmitted simultaneously on at least two antenna subsets of the N antenna subsets, that is, SRS can be transmitted in a switchable manner on the subsets of multiple transmit antennas, so that the same SRS resource can be applied to different SRS antennas, thereby solving the problem that SRS switching transmission between multiple antennas, especially multiple antennas above two antennas, cannot be supported in the related art.

In an optional implementation manner of this embodiment, the predefined rule involved in this embodiment may include the following:

(1) when the frequency hopping function of the SRS is not enabled, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

(2): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N; or,

(3): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is even and K is an integer multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

(4): when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

furthermore, it should be noted that the predefined rules include: the periodic SRS is transmitted on a subset of the N antennas. And the predefined rules include: the aperiodic SRS is transmitted over N antenna subsets, wherein triggering the aperiodic SRS transmission N times at a time is supported. The N aperiodic SRS transmissions are respectively sent on N consecutive uplink transmission symbols in the special subframe.

Before the step S102, sending sounding reference signals on the N antenna subsets according to the predefined rule, the method of this embodiment further includes: the transmit antennas are divided into N antenna subsets.

Furthermore, before the sounding reference signal is transmitted on the N antenna subsets according to the predefined rule at step S102, the method further includes: and receiving signaling of the base station side, wherein the signaling is used for instructing the SRS to be transmitted on the N antenna subsets according to a predefined rule.

In addition, the predefined rule involved in this embodiment may also be: and selecting the antenna subset corresponding to the optimal downlink channel to transmit the SRS according to the downlink channel state information.

The predefined rule for (1) above can be summarized as: determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS; and the predefined rules of (2) to (3) can be summarized as follows on the basis of (1): in case the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

Optionally, in an optional implementation manner of this embodiment, N of this embodiment is 4, and there is one antenna in each antenna subset.

Fig. 2 is a flowchart of a signaling configuration method for a sounding reference signal according to an embodiment of the present invention, and as shown in fig. 2, the method includes the steps of:

step S202: a base station sends signaling for instructing a terminal to send Sounding Reference Signals (SRS) on N antenna subsets of the terminal according to a predefined rule to the terminal, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

As can be seen from the foregoing step S202, the base station may instruct the terminal to transmit the sounding reference signal SRS on the N antenna subsets of the terminal according to the predefined rule, that is, the SRS may be transmitted in a switchable manner on the subsets of the multiple transmit antennas, so that the same SRS resource may be applied to different SRS antennas, thereby solving the problem that the SRS switching transmission between multiple antennas, especially multiple antennas above two antennas, cannot be supported in the related art.

(5) when the frequency hopping function of the SRS is not enabled, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

(6) when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N; or,

(7) when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is even and K is an integer multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

(8) when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

it should be noted that the predefined rule of (5) above can be summarized as follows: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the SRS transmission times. And based on the predefined rule of (5), the predefined rules for (6) to (8) can be generalized such that, when the frequency hopping function is enabled, the index of the transmitting antenna subset where the SRS is transmitted is determined according to at least the number of subbands allowing frequency hopping and the number of times the SRS is transmitted.

For step S202 involved in this embodiment, the manner in which the base station sends the signaling for instructing the terminal to send the sounding reference signal SRS on the N antenna subsets of the terminal according to the predefined rule to the terminal may be implemented as follows:

the first method is as follows: and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating whether the SRS is sent on the N antenna subsets of the terminal according to a predefined rule or not.

The second method comprises the following steps: and sending 1-bit high-level signaling to the terminal, wherein the 1-bit high-level signaling is used for indicating that an antenna selection function of the SRS on the two antennas is started or not in the reuse existing protocol, and the antenna selection function is used for indicating that whether the SRS is sent on N antenna subsets of the terminal or not according to a predefined rule or not to the terminal.

The third method comprises the following steps: and sending 2-bit high-layer signaling to the terminal, wherein the 2-bit high-layer signaling indicates whether the SRS is sent on the N antenna subsets of the terminal according to a predefined rule and the adopted predefined rule to the terminal.

The method is as follows: and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating a predefined rule adopted by the SRS to be sent on the N antenna subsets to the terminal.

The fifth mode is as follows: sending 1-bit high-level signaling to a terminal, wherein the 1-bit high-level signaling is used for indicating whether to enable the aperiodic sounding reference signal to be sent on N antenna subsets according to a predefined rule; meanwhile, if the 1-bit high-level signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on N antenna subsets according to a predefined rule, reusing the existing 1-bit physical layer signaling for triggering the aperiodic SRS transmission to trigger the aperiodic SRS transmission to be continuously transmitted for N times on the effective SRS resource; wherein, the valid SRS resource refers to an SRS resource that can be used for transmitting the aperiodic SRS.

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

In this embodiment, a sending apparatus for sounding reference signals and a signaling configuration apparatus are also provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted for the sake of description. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 3 is a block diagram of a transmitting apparatus of a sounding reference signal according to an embodiment of the present invention, the apparatus being applied to a terminal side, the apparatus including: a first sending module 32, configured to send sounding reference signals SRS on N antenna subsets according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

(9) when the frequency hopping function of the SRS is not enabled, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

(10): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N; or,

(11): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is even and K is an integer multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

(12): when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) According to the followingDetermining the formula:

or,

Before transmitting sounding reference signals on the N antenna subsets according to the predefined rule, the apparatus of this embodiment further includes: and a third transmitting module, configured to divide the transmitting antennas into N antenna subsets.

In addition, before transmitting sounding reference signals on the N antenna subsets according to the predefined rule, the apparatus of this embodiment further includes: and the receiving module is used for receiving signaling of the base station side, wherein the signaling is used for indicating the SRS to be transmitted on the N antenna subsets according to a predefined rule.

The predefined rule for (9) above can be summarized as: determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS; and the predefined rules of (10) to (12) can be summarized as follows on the basis of (9): in case the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

Fig. 4 is a block diagram of a signaling configuration apparatus for sounding reference signals according to an embodiment of the present invention, and as shown in fig. 4, the apparatus is applied to an apparatus side and includes: a second sending module 42, configured to send, to the terminal, a signaling for instructing the terminal to send sounding reference signals SRS on N antenna subsets of the terminal according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

(13) when the frequency hopping function of the SRS is not enabled, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

(14): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N; or,

(15): when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is even and K is an integer multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

(16): when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

it should be noted that the predefined rule of (13) above can be summarized as follows: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the SRS transmission times. And based on the predefined rule of (13), the predefined rules for (14) to (16) can be generalized such that, when the frequency hopping function is enabled, the index of the transmitting antenna subset where the SRS is transmitted is determined according to at least the number of subbands allowing frequency hopping and the number of times the SRS is transmitted.

For the second sending module involved in this embodiment, sending, to the terminal, signaling for instructing the terminal to send the sounding reference signal SRS on the N antenna subsets of the terminal according to the predefined rule may be implemented by:

a first transmission unit: and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating whether the SRS is sent on the N antenna subsets of the terminal according to a predefined rule or not.

A first reuse unit: the method is used for reusing an antenna selection function which is used for indicating whether the SRS is started on the two antennas or not in the existing protocol, and the antenna selection function is used for indicating whether the SRS is transmitted on N antenna subsets of the terminal or not according to a predefined rule or not.

A second transmitting unit: and sending 2-bit high-layer signaling to the terminal, wherein the 2-bit high-layer signaling indicates whether the SRS is sent on the N antenna subsets of the terminal according to a predefined rule and the adopted predefined rule to the terminal.

A third transmitting unit: and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating a predefined rule adopted by the SRS to be sent on the N antenna subsets to the terminal.

A fourth transmitting unit: sending 1-bit high-level signaling to a terminal, wherein the 1-bit high-level signaling is used for indicating whether to enable the aperiodic sounding reference signal to be sent on N antenna subsets according to a predefined rule; a second reusing unit, configured to reuse an existing 1-bit physical layer signaling for triggering aperiodic SRS transmission for triggering the aperiodic SRS to perform consecutive N times of transmission on an effective SRS resource if the 1-bit high layer signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on N antenna subsets according to a predefined rule; wherein, the valid SRS resource refers to an SRS resource that can be used for transmitting the aperiodic SRS.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The invention will now be illustrated with reference to an alternative embodiment thereof;

the optional embodiment provides a sounding reference signal sending and signaling configuration method, and by adopting the method of the optional embodiment, switching sending of sounding reference signals on multiple sending antennas can be realized, so that the same SRS resource can be applied to different SRS antennas, and compared with a case where multiple antennas (the number of antennas is at least greater than 2) are simultaneously sent, the SRS resource is saved, the problem of insufficient SRS capacity in a large-scale multiple-input multiple-output system is solved, and meanwhile, a base station in a TDD system can obtain all downlink channel information by using the sounding reference signals of a terminal.

The invention provides a method for sending a sounding reference signal and configuring a signaling, which comprises the following steps:

step S301: the base station sends signaling to the terminal, and the signaling is used for indicating the terminal to send the sounding reference signal according to a predefined rule;

step S302: and the terminal receives the signaling sent by the base station and sends the sounding reference signal on the N antenna subsets according to a predefined rule.

Wherein N is a positive integer, and each antenna subset includes at least one antenna. There may be only one antenna in each antenna subset, where N is an integer greater than 2. When at least one antenna subset in each antenna subset comprises at least two antennas, optionally, before the terminal transmits sounding reference signals on the N antenna subsets according to a predefined rule, the transmit antennas of the terminal are divided into N subsets. For example, N is equal to and each antenna subset has only 1 antenna, which means that the terminal has 4 transmit antennas, and the terminal will transmit the sounding reference signal on these four antennas according to the predefined rule.

Alternatively, the predefined rule may also be understood as a rule for antenna switching or a rule for antenna selection.

In addition, the base station may also instruct the terminal to transmit the sounding reference signal according to a predefined rule in one of the following manners:

the first method is as follows: and indicating whether the sounding reference signal is transmitted according to a predefined rule or not to the terminal through 1-bit high-layer signaling. For example, when the 1-bit high layer signaling indicates 0, it indicates that the sounding reference signal is not transmitted according to the predefined rule, and when the signaling indicates 1, it indicates that the sounding reference signal is transmitted according to the predefined rule. The 1-bit high-level signaling may reuse a 1-bit high-level signaling in the existing protocol for indicating to the terminal whether to turn on the antenna selection transmission function of the two antennas, or may be a newly added 1-bit high-level signaling.

The second method comprises the following steps: and indicating whether the sounding reference signal is transmitted according to the predefined rule and the adopted predefined rule to the terminal through 2-bit high-layer signaling. Wherein the two bits can be signaled jointly, e.g., as shown in table 1; these two bits can also be signaled independently; for example, one bit is 1-bit high-level signaling used for indicating whether to turn on an antenna selection transmission function of two antennas in the existing protocol, when the terminal has N SRS transmission antenna subsets (the total number of transmission antennas included in the N transmission antenna subsets is greater than 2), the 1-bit high-level signaling simultaneously indicates to the terminal whether to transmit sounding reference signals on the N antenna subsets according to a predefined rule, the second bit is valid only when the first bit indicates to transmit sounding reference signals according to the predefined rule, the second bit is used for indicating to the terminal the predefined rule adopted for SRS transmission on the N transmission antenna subsets, for example, when the second bit indicates 0, the predefined rule 1 is adopted, and when the second bit indicates 1, the predefined rule 2 is adopted. Alternatively, the predefined rule may be any one of the following embodiments one to six.

TABLE 1

2 bit high layer signaling	Description of the invention
		00	Transmitting sounding reference signals without following predefined rules
01	Transmitting sounding reference signals according to predefined rule 1
		10	Transmitting sounding reference signals according to predefined rule 2
11	Retention

The third method comprises the following steps: and indicating whether the sounding reference signal is transmitted according to a predefined rule to the terminal by adding 1-bit physical layer signaling. The method is mainly used when the sounding reference signals transmitted on the N antenna subsets of the terminal are limited to the aperiodic sounding reference signal. The newly added 1-bit physical layer signaling is only valid when the aperiodic sounding reference signal is triggered, i.e. the newly added 1-bit physical layer signaling is valid only when the 1-bit physical layer signaling for triggering the aperiodic sounding reference signal in the existing protocol indicates 1. Optionally, when the aperiodic sounding reference signal is triggered, the newly added 1-bit physical layer signaling indicates to the terminal to turn on the antenna selection transmission function of the N antenna subsets, and implicitly indicates to the terminal that the aperiodic sounding reference signal needs to be continuously transmitted NK times, so as to complete the measurement of channel quality information of four antennas at the full bandwidth at a time.

The method is as follows: sending 1-bit high-level signaling to the terminal for indicating to the terminal whether to enable aperiodic sounding reference signals to be sent on the N antenna subsets according to a predefined rule; and if the 1-bit high-level signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule, reusing the existing 1-bit physical layer signaling for triggering the aperiodic SRS transmission to trigger the aperiodic SRS transmission to be transmitted on the effective SRS resource for N times continuously. Wherein the valid SRS resources refer to SRS resources that can be used to transmit the aperiodic SRS.

Alternatively, the predefined rule includes that sounding reference signals transmitted on the N antenna subsets of the terminal according to the predefined rule described below may be limited to periodic sounding reference signals only. Of course, the measurement of the full-bandwidth channel quality information may also be performed only by the aperiodic sounding reference signal, and when the sounding reference signals transmitted on the N antenna subsets of the terminal according to the following predetermined rule are only limited by the aperiodic sounding reference signal, the aperiodic sounding reference signal needs to support triggering for N consecutive transmissions once. Preferably, the N aperiodic sounding reference signals are respectively transmitted on N consecutive uplink transmission symbols of a special subframe of the TDD system. When the periodic sounding reference signal is limited, the periodic sounding reference signal completes one measurement of the full-bandwidth channel quality information in every NK SRS transmission.

Optionally, the predefined rule includes that N antenna subsets for transmitting sounding reference signals are respectively located on N consecutive uplink transmission symbols of the special subframe of the TDD system to transmit SRS.

Optionally, the predefined rule includes that the sounding reference signal is not transmitted simultaneously on at least two of the N antenna subsets of the terminal.

Optionally, the predefined rule adopted by the sounding reference signal to be transmitted on the N antenna subsets includes:

when the sounding reference signal frequency hopping function is not enabled, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N。

when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod N, or, alternatively,

when the sounding reference signal frequency hopping function is enabled and the number of the sub-bands allowing frequency hopping is KN-th when K is an integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

the predefined rule for transmitting sounding reference signals on N transmit antenna subsets described in this embodiment will be illustrated by the following embodiments:

the first embodiment is as follows:

the terminal has four transmitting antennas, and the terminal transmits sounding reference signals on the four antennas according to a predefined rule, which specifically includes:

when the SRS frequency domain frequency hopping function is not enabled, the terminal is in the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmod4

when the SRS frequency domain frequency hopping function is enabled, the terminal is in the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

wherein,

wherein K represents the number of SRS subbands allowing SRS frequency hopping under the condition that the SRS frequency domain frequency hopping function is enabled, and K is defaulted to 1 under the condition that the SRS frequency hopping function is not enabled, and n is_SRSCounter representing the number of user-specific SRS transmissions, n_SRSIs a non-negative integer.

In the first scheme, the SRS transmitting antenna is continuously switched with the change of the SRS transmission times. When the SRS hopping function is enabled, the SRS transmit antennas are also switched as the SRS subbands hop.

Fig. 5A is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 2, where K is 2, i.e., the SRS transmission rule on four transmission antennas when there are two hopping subbands, as shown in fig. 5A. With the switching of the two subbands, the transmitting antennas of the SRS are also switched: when the 0 th SRS transmission (n)_SRS0), SRS is transmitted on subband 0 and the first antenna (TX 0); when the 1 st SRS transmission (n)_SRS1), SRS is transmitted on subband 1 and a second antenna (TX 1); when the 2 nd SRS transmission (n)_SRS2), the sub-band of the SRS hops into a second hopping period, and the SRS is transmitted on sub-band 0 and a third antenna (TX 2); when the 3 rd SRS transmission (n)_SRS3), the subband hopping of the SRS is in the second hopping period, the SRS is transmitted on subband 1 and the fourth antenna (TX 3); when the 4 th SRS transmission (n)_SRS4), the sub-band of the SRS hops into a third hop period, the SRS is transmitted on sub-band 0 and a second antenna (TX 1); when the 5 th SRS transmission (n)_SRS5), the subband hopping of the SRS is in the third hopping period, the SRS is transmitted on subband 1 and the third antenna (TX 2); when the SRS transmission (n) is performed for the 6 th time_SRS6), the sub-band of the SRS hops into a fourth hop period, the SRS is transmitted on sub-band 0 and a fourth antenna (TX 3); when the 7 th SRS transmission (n)_SRS7), the subband hopping of the SRS is in the fourth hopping period, the SRS is transmitted on subband 1 and the 1 st antenna (TX 0); in the subsequent SRS transmission, the SRS is transmitted regularly, and so on. It follows that in 4K (where K ═ 2) SRS transmissions, the terminal is on each subbandAfter completing the sending of the four-antenna SRS, the base station may obtain the uplink/downlink channel quality information on each subband with four transmitting antennas/four receiving antennas by using the SRS signals received from the four antennas on each subband.

Fig. 5B is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 3, as shown in fig. 5B, K is 3, that is, the SRS transmission rule on four transmission antennas when there are three hopping subbands: with the switching of the sub-bands, the transmission of the SRS is cyclically and sequentially switched among the first antenna (TX0), the second antenna (TX1), the third antenna (TX2), and the fourth antenna (TX 3).

Fig. 5C is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 4 according to an embodiment of the present invention, and as shown in fig. 5C, K is 4, that is, the SRS transmission rule on four transmission antennas when there are four hopping subbands: with subband switching, the first SRS subband hopping period (n)_SRS0-3), the SRS is sequentially transmitted on a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX3), respectively; in the second SRS subband frequency hopping period (n)_SRS4-7), the SRS is transmitted over the second antenna (TX1), the third antenna (TX2), the fourth antenna (TX3), and the first antenna (TX0), respectively; in the third SRS subband frequency hopping period (n)_SRS8-11), the SRS is transmitted over a third antenna (TX2), a fourth antenna (TX3), a first antenna (TX0), and a second antenna (TX1), respectively; in the fourth SRS subband frequency hopping period (n)_SRS12-15), the SRS is transmitted sequentially from a fourth antenna (TX3), a first antenna (TX0), a second antenna (TX1), and a third antenna (TX2), respectively.

Fig. 5D is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 6, as shown in fig. 5D, when K is 6, that is, when there are six hopping subbands, the SRS transmission rule on four transmission antennas is as follows: in every 4K SRS transmissions, two previous subband hopping periods (n)_SRS0-11), the SRS transmission is circularly and sequentially switched among a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX 3); second two sub-band hopping cyclesPeriod (n)_SRS12-23), SRS transmission is cyclically and sequentially switched among the second antenna (TX1), the third antenna (TX2), the fourth antenna (TX3), and the first antenna (TX 0).

The SRS transmission rules on the four antennas under other K values can be derived by using the formula in the first scheme, and are not described herein again in view of the space.

Example two:

when the SRS frequency domain frequency hopping function is not enabled or enabled, the terminal is in the nth condition_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

Different from the first scheme, the antenna is switched at the same time of sub-band switching every time, and in the second scheme, when the SRS frequency hopping function is enabled, the SRS transmitting antenna is not switched in one SRS frequency domain frequency hopping period, and only when a new SRS frequency domain frequency hopping period is entered each time, the SRS transmitting antenna is switched. Like the first scheme, the second scheme is to complete the four-antenna SRS transmission on each subband in 4K SRS transmissions.

Fig. 6A is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 2 according to an embodiment of the present invention, and as shown in fig. 6A, K is 2, that is, SRS is transmitted in four frequency subbands when there are two hopping subbandsTransmission law on the transmitting antenna: in the first SRS frequency hopping period (n)_SRS0-1), the SRS is transmitted on a first antenna (TX 0); in the second SRS frequency hopping period (n)_SRS2-3), the SRS is transmitted on a second antenna (TX 1); in the third SRS frequency hopping period (n)_SRS4-5), the SRS is transmitted on a third antenna (TX 2); in four SRS hopping periods (n)_SRS6-7), the SRS is transmitted on a fourth antenna (TX 3).

Fig. 6B is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 3 according to an embodiment of the present invention, and as shown in fig. 6B, K is 3, that is, the SRS transmission rule on four transmission antennas when there are three hopping subbands: in the first SRS frequency hopping period (n)_SRS0-2), the SRS is transmitted on a first antenna (TX 0); in the second SRS frequency hopping period (n)_SRS3-5), the SRS is transmitted on a second antenna (TX 1); in the third SRS frequency hopping period (n)_SRS6-8), the SRS is transmitted on a third antenna (TX 2); in the fourth SRS frequency hopping period (n)_SRS9-11), the SRS is transmitted on a fourth antenna (TX 3).

Fig. 6C is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 4 according to the second embodiment of the present invention, and as shown in fig. 6C, K is 4, that is, the SRS transmission rule on four transmission antennas when there are four hopping subbands: in the first SRS frequency hopping period (n)_SRS0-3), the SRS is transmitted on a first antenna (TX 0); in the second SRS frequency hopping period (n)_SRS4-7), the SRS is transmitted on a second antenna (TX 1); in the third SRS frequency hopping period (n)_SRS8-11), SRS is transmitted on a third antenna (TX 2); in the fourth SRS frequency hopping period (n)_SRS12-15), the SRS is transmitted on a fourth antenna (TX 3).

Fig. 6D is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 6 according to the second embodiment of the present invention, and as shown in fig. 6D, K is 6, that is, the SRS transmission rule on four transmission antennas when there are six hopping subbands: in the first SRS frequency hopping period (n)_SRS0-5), the SRS is transmitted on a first antenna (TX 0); in the second SRS frequency hopping period (n_SRS6-11), the SRS is transmitted on a second antenna (TX 1); in the third SRS frequency hopping period (n)_SRS12-17), SRS is transmitted on a third antenna (TX 2); in the fourth SRS frequency hopping period (n)_SRS18-23), the SRS is transmitted on a fourth antenna (TX 3).

The SRS transmission rules on the four antennas under other K values can be derived by using the formula in the second scheme, and are not described herein again in view of the space.

Example three:

a(n_SRS)＝n_SRSmod4

wherein,

wherein K represents the number of SRS subbands allowing SRS frequency hopping under the condition that the SRS frequency domain frequency hopping function is enabled, and K is defaulted to 1 under the condition that the SRS frequency hopping function is not enabled, and n is_SRSCounter representing the number of user-specific SRS transmissions, n_SRSIs a non-negative integer。

The third scheme is characterized in that when the SRS frequency hopping function is enabled and K is an even number, the SRS transmitting antennas are switched every two times (namely, each pair) of SRS transmission, and the antenna switching rule between the pairs is the same as the switching rule of the SRS transmitting antennas with two antennas in the prior protocol. Scheme three also completes the transmission of four-antenna SRS on each subband in 4K SRS transmissions.

Fig. 7A is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 2, where K is 2, that is, the SRS transmission rule on four transmission antennas when there are two hopping subbands: in the first pair of SRS transmissions (n)_SRS0-1), the SRS is transmitted on a first antenna (TX 0); in the second pair of SRS transmissions (n)_SRS2-3), the SRS is transmitted on a second antenna (TX 1); in the third pair of SRS transmissions (n)_SRS4-5), the SRS is transmitted on a third antenna (TX 2); in the fourth pair of SRS transmissions (n)_SRS6-7), the SRS is transmitted on a fourth antenna (TX 3).

Fig. 7B is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention, when the number of SRS hopping subbands is 3, and as shown in fig. 7B, K is 3, that is, when there are three hopping subbands, the SRS is transmitted on four transmission antennas: when the number of subbands is odd, the SRS is transmitted on four transmit antennas according to the same rule as the first scheme, which is not described herein again.

Fig. 7C is a schematic diagram of a four-antenna SRS transmission method according to a third embodiment of the present invention when the number of SRS hopping subbands is 4, and as shown in fig. 7C, when K is 4, that is, there are four hopping subbands, the SRS transmission rule on four transmission antennas is as follows: in the first pair (n)_SRS0 to 1) and a second pair (n)_SRS2 to 3) and a third pair (n)_SRS4 to 5), a fourth pair (n)_SRS6-7) in the SRS transmission, the SRS is transmitted on a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX3), respectively; in the fifth pair (n)_SRS8 to 9), sixth pair (n)_SRS10-11), seventh pair (n)_SRS12 to 13), eighth pair (n)_SRS14-15) SRS Transmission, SRS transmit on the second antenna (TX1), the third antenna (TX2), the fourth antenna (TX3), the first antenna (TX0), respectively.

Fig. 7D is a schematic diagram of a four-antenna SRS transmission method according to the third embodiment of the present invention when the number of SRS hopping subbands is 6, as shown in fig. 7D, where K is 6, that is, the SRS transmission rule on four transmission antennas when there are six hopping subbands: in the first pair (n)_SRS0 to 1) and a second pair (n)_SRS2 to 3) and a third pair (n)_SRS4 to 5), a fourth pair (n)_SRS6-7) in the SRS transmission, the SRS is transmitted on a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX3), respectively; in the fifth pair (n)_SRS8 to 9), sixth pair (n)_SRS10-11), seventh pair (n)_SRS12 to 13), eighth pair (n)_SRS14-15) in SRS transmission, an SRS is transmitted over a first antenna (TX0), a second antenna (TX1), a third antenna (TX2), and a fourth antenna (TX3), respectively; in the ninth pair (n)_SRS16-17), tenth pair (n)_SRS18 to 19), a tenth pair (n)_SRS20 to 21), a twelfth pair (n)_SRS22-23) in SRS transmission, SRS is transmitted from a first antenna (TX0), a second antenna (TX1), a third antenna (TX2), and a fourth antenna (TX3), respectively.

The SRS transmission rules on the four antennas under other K values can be derived by using the formula in the third scheme, and are not described herein again in view of the space.

Example four:

a(n_SRS)＝n_SRSmod4

wherein,

The third scheme is the same as the first scheme, and is characterized in that the SRS sending antenna is continuously switched along with the change of the SRS transmission times; when the SRS frequency hopping function is enabled, the SRS transmitting antenna is also switched along with the frequency hopping of the SRS sub-band; but the switching order is slightly different, especially when SRS hopping function is enabled and K is even.

Fig. 8A is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 2, and as shown in fig. 8A, K is 2, that is, when there are two hopping subbands, the SRS is transmitted on four transmission antennas. With the switching of the two subbands, the transmitting antennas of the SRS are also switched: when the 0 th SRS transmission (n)_SRS0), SRS is transmitted on subband 0 and the first antenna (TX 0); when the 1 st SRS transmission (n)_SRS1), SRS is transmitted on subband 1 and a second antenna (TX 1); when the 2 nd SRS transmission (n)_SRS2), the sub-band of the SRS hops into the secondA frequency hopping period, SRS transmitted on subband 0 and a third antenna (TX 2); when the 3 rd SRS transmission (n)_SRS3), the subband hopping of the SRS is in the second hopping period, the SRS is transmitted on subband 1 and the fourth antenna (TX 3); when the 4 th SRS transmission (n)_SRS4), the sub-band of the SRS hops into a third hop period, the SRS is transmitted on sub-band 0 and a second antenna (TX 1); when the 5 th SRS transmission (n)_SRS5), the subband hopping of the SRS is in the third hopping period, the SRS is transmitted on subband 1 and the third antenna (TX 2); when the SRS transmission (n) is performed for the 6 th time_SRS6), the sub-band of the SRS hops into a fourth hop period, the SRS is transmitted on sub-band 0 and a fourth antenna (TX 3); when the 7 th SRS transmission (n)_SRS7), the subband hopping of the SRS is in the fourth hopping period, the SRS is transmitted on subband 1 and the 1 st antenna (TX 0); in the subsequent SRS transmission, the SRS is transmitted regularly, and so on. Therefore, in 4K (here, K is 2) SRS transmissions, the terminal completes four-antenna SRS transmission on each subband, and the base station can obtain uplink/downlink channel quality information on each subband when there are four transmit antennas and four receive antennas by using SRS signals received from four antennas on each subband.

Fig. 8B is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 3 according to an embodiment of the present invention, and as shown in fig. 8B, K is 3, that is, the SRS transmission rule on four transmission antennas when there are three hopping subbands: with the switching of the sub-bands, the transmission of the SRS is cyclically and sequentially switched among the first antenna (TX0), the second antenna (TX1), the third antenna (TX2), and the fourth antenna (TX 3).

Fig. 8C is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 4, and as shown in fig. 8C, K is 4, that is, when there are four hopping subbands, the SRS is transmitted on four transmission antennas: following subband switching, the first four SRS transmissions (n)_SRS0-3), the SRS is sequentially transmitted on a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX3), respectively; in the second four SRS transmissions (n)_SRS4-7), the SRS is respectively arranged on a second antenna (TX1), a third antenna (TX2),Transmit on a fourth antenna (TX3), the first antenna (TX 0); in the third four SRS transmissions (n)_SRS8-11), the SRS is transmitted over a third antenna (TX2), a fourth antenna (TX3), a first antenna (TX0), and a second antenna (TX1), respectively; in the fourth four SRS transmissions (n)_SRS12-15), the SRS is transmitted sequentially from a fourth antenna (TX3), a first antenna (TX0), a second antenna (TX1), and a third antenna (TX2), respectively.

Fig. 8D is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 6 according to an embodiment of the present invention, and as shown in fig. 8D, when K is 6, that is, when there are six hopping subbands, the SRS is transmitted on four transmission antennas: following subband switching, the first four SRS transmissions (n)_SRS0-3), the SRS is sequentially transmitted on a first antenna (TX0), a second antenna (TX1), a third antenna (TX2) and a fourth antenna (TX3), respectively; in the second four SRS transmissions (n)_SRS4-7), the SRS is transmitted over a first antenna (TX0), a second antenna (TX1), a fourth antenna (TX3), and a first antenna (TX0), respectively; in the third four SRS transmissions (n)_SRS8-11), the SRS is transmitted over the second antenna (TX1), the third antenna (TX2), the fourth antenna (TX3), and the first antenna (TX0), respectively; in the fourth four SRS transmissions (n)_SRS12-15), the SRS is transmitted over a third antenna (TX2), a fourth antenna (TX3), a first antenna (TX0), and a second antenna (TX1), respectively; in the fifth four SRS transmissions (n)_SRS16-19), the SRS is transmitted over a third antenna (TX2), a fourth antenna (TX3), a second antenna (TX1), and a third antenna (TX2), respectively; in the sixth four SRS transmissions (n)_SRS20-23), the SRS is transmitted over a fourth antenna (TX3), a first antenna (TX0), a second antenna (TX1), and a third antenna (TX2), respectively.

The SRS transmission rules on the four antennas under other K values can be derived by using the formula in scheme four, and are not described herein again in view of the space.

Example five:

the four SRS transmitting antennas of the terminal are divided into two groups, which are respectively called a first antenna group and a second antenna group (set indexes are respectively 0 and 1). The SRS is transmitted simultaneously on two antennas within a group and orthogonality is achieved by using different cyclic shift sequences, the antennas not being transmitted simultaneously between the groups. For convenience of description, it is assumed that antennas included in the first antenna group are a first antenna (TX0) and a second antenna (TX1), and antennas included in the second antenna group are a third antenna (TX2) and a fourth antenna (TX 3).

When the SRS frequency domain frequency hopping function is not enabled, the terminal is in the nth_SRSIndex of transmitting antenna group where secondary SRS transmission is locatedDetermined according to the following formula:

when the SRS frequency domain frequency hopping function is enabled, the terminal is in the nth_SRSIndex of transmitting antenna group where secondary SRS transmission is locatedDetermined according to the following formula:

wherein,

wherein K represents the number of SRS subbands allowing SRS frequency hopping when the SRS frequency domain hopping function is enabledK defaults to 1, n under the condition that SRS frequency hopping function is not enabled_SRSCounter representing the number of user-specific SRS transmissions, n_SRSIs a non-negative integer.

In the scheme, the SRS sending antenna group is regularly switched along with the change of the SRS transmission times. When the SRS hopping function is enabled, the set of SRS transmit antennas also switches regularly as the SRS subbands hop. With the scheme, the SRS transmission of the terminal on the four antennas can be completed only by 2K transmissions.

Fig. 9A is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 2 according to an embodiment of the present invention, and as shown in fig. 9A, K is 2, that is, the SRS transmission rule on four transmission antennas (two antenna groups) when there are two hopping subbands. With the switching of the two subbands, the set of transmit antennas of the SRS is also switched regularly: when the 0 th SRS transmission (n)_SRS0), SRS is transmitted on subband 0 and the first antenna group (TX0 and TX 1); when the 1 st SRS transmission (n)_SRS1), SRS is transmitted on subband 1 and the second antenna group (TX2 and TX 3); when the 2 nd SRS transmission (n)_SRS2), the sub-band of the SRS hops into a second hopping period, the SRS is transmitted on sub-band 0 and the second antenna group (TX2 and TX 3); when the 3 rd SRS transmission (n)_SRS3), the sub-band hopping of the SRS is in the second hopping period, and the SRS is transmitted on the sub-band 1 and the first antenna group (TX0 and TX 1).

Fig. 9B is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 3 according to an embodiment of the present invention, and as shown in fig. 9B, K is 3, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are three hopping subbands: with the switching of the sub-bands, the transmission of the SRS is cyclically switched sequentially on the first antenna group (TX0 and TX1), the second antenna group (TX2 and TX 3).

Fig. 9C is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 4, as shown in fig. 9C, where K is 4, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are four hopping subbands: with switching of sub-bandsIn the first half (n) of the first SRS subband hopping period_SRS0-1), sequentially transmitting the SRS on a first antenna group (TX0 and TX1) and a second antenna group (TX2 and TX3), respectively; in the second half of the first SRS subband hopping period (n)_SRS2-3), the SRS is sequentially transmitted on the second antenna group (TX2 and TX3) and the first antenna group (TX0 and TX1), respectively; in the first half (n) of the second SRS subband hopping period_SRS4-5), sequentially transmitting the SRS on a first antenna group (TX0 and TX1) and a second antenna group (TX2 and TX3), respectively; in the second half period (n) of the second SRS subband hopping period_SRS6-7), the SRS is sequentially transmitted on the second antenna group (TX2 and TX3) and the first antenna group (TX0 and TX1), respectively. When K is 4, SRS transmission with four antennas on each of the 4 subbands can be completed with 8 SRS transmissions.

Fig. 9D is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 6, where K is 6, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are six hopping subbands: following subband switching, the first half of the hopping period (e.g., n) is performed for each SRS subband_SRS＝0～1、n_SRS＝4～5、n_SRS8-9), the SRS is sequentially transmitted on the first antenna group (TX0 and TX1) and the second antenna group (TX2 and TX3), respectively; in the second half of each SRS subband hopping period (e.g., n)_SRS＝2～3、n_SRS＝6～7、n_SRS10-11), the SRS is sequentially transmitted on the second antenna group (TX2 and TX3) and the first antenna group (TX0 and TX1), respectively. When K is 6, SRS transmission with four antennas on each of 6 subbands can be completed with 12 SRS transmissions.

The SRS transmission rules on the four antennas under other K values can be derived by using the formula in the fifth scheme one by one, and are not described herein again in view of the space.

Example six:

When the SRS frequency domain frequency hopping function is not enabled or enabled, the terminal is in the nth condition_SRSIndex of transmitting antenna group where secondary SRS transmission is locatedDetermined according to the following formula:

wherein K represents the number of SRS subbands allowing SRS frequency hopping under the condition that the SRS frequency domain frequency hopping function is enabled, and K is defaulted to 1 under the condition that the SRS frequency hopping function is not enabled, and n is_SRSCounter representing the number of user-specific SRS transmissions, n_SRSIs a non-negative integer. The scheme is characterized in that the SRS sending antenna is switched once every K times of SRS transmission, and when the SRS subband frequency hopping function is enabled, the switching of the SRS sending antenna occurs while each SRS subband frequency hopping cycle is switched.

Fig. 10A is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 2 according to an embodiment of the present invention, and as shown in fig. 10A, K is 2, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are two hopping subbands. In the first SRS frequency hopping period (n)_SRS0-1), each time SRS is transmitted, the SRS is transmitted on the first antenna group (TX0 and TX 1); in the second SRS frequency hopping periodPeriod (n)_SRS2-3), each SRS transmission is transmitted on the second antenna group (TX2 and TX 3).

Fig. 10B is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 3 according to an embodiment of the present invention, and as shown in fig. 10B, K is 3, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are three hopping subbands. In the first SRS frequency hopping period (n)_SRS0-2), each time SRS is transmitted, the SRS is transmitted on the first antenna group (TX0 and TX 1); in the second SRS frequency hopping period (n)_SRS3-5), each SRS transmission is transmitted over the second antenna group (TX2 and TX 3).

Fig. 10C is a schematic diagram of a four-antenna SRS transmission method according to an embodiment of the present invention when the number of SRS hopping subbands is 4, as shown in fig. 10C, where K is 4, that is, when there are four hopping subbands, the SRS is transmitted on four transmission antennas (two transmission antenna groups). In the first SRS frequency hopping period (n)_SRS0-3), each time SRS is transmitted, SRS is transmitted on the first antenna group (TX0 and TX 1); in the second SRS frequency hopping period (n)_SRS4-7), each SRS transmission is transmitted on the second antenna group (TX2 and TX 3).

Fig. 10D is a schematic diagram of a four-antenna SRS transmission method when the number of SRS hopping subbands is 6 according to an embodiment of the present invention, and as shown in fig. 10D, K is 6, that is, the SRS transmission rule on four transmission antennas (two transmission antenna groups) when there are six hopping subbands. In the first SRS frequency hopping period (n)_SRS0-5), each time SRS is transmitted, SRS is transmitted on the first antenna group (TX0 and TX 1); in the second SRS frequency hopping period (n)_SRS6-11), each SRS is transmitted over the second antenna group (TX2 and TX 3).

The SRS transmission rules on the four antennas under other K values can be derived by using the formulas in the sixth embodiment one by one, which is not described herein again.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, transmitting sounding reference signals SRS on N antenna subsets according to a predefined rule, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for transmitting a Sounding Reference Signal (SRS), comprising:

sending Sounding Reference Signals (SRS) on N antenna subsets according to a predefined rule, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

2. The method of claim 1, wherein the predefined rule comprises: at the placeWhen the frequency hopping function of the SRS is not enabled, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN。

3. the method of claim 1, wherein the predefined rule comprises: when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN; or,

4. the method of claim 1, wherein the predefined rule comprises: when the frequency hopping function of the SRS enables and allows the frequency hopping of the number K of the sub-bands to be even and K to be integral multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

5. the method of claim 1, wherein the predefined rule comprises: when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

6. the method of claim 1, wherein the predefined rule comprises: transmitting a periodic SRS over the N subsets of antennas.

7. The method of claim 1, wherein the predefined rule comprises: and transmitting the aperiodic SRS over the N antenna subsets, wherein triggering the aperiodic SRS transmission N times at a time is supported.

8. The method of claim 1, wherein the predefined rule comprises: and the N antenna subsets for sending the sounding reference signals are respectively positioned on N continuous uplink transmission symbols in a special subframe of the TDD system to send the SRS.

9. The method according to any of claims 1 to 8, wherein before transmitting sounding reference signals on the N subsets of antennas according to a predefined rule, the method further comprises:

dividing the transmit antennas into the N antenna subsets.

10. The method according to any of claims 1 to 8, wherein before transmitting sounding reference signals on the N subsets of antennas according to a predefined rule, the method further comprises:

and receiving signaling of a base station side, wherein the signaling is used for indicating the SRS to be transmitted on the N antenna subsets according to the predefined rule.

11. The method according to any of claims 1 to 5, wherein the predefined rule comprises: and determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS.

12. The method of claim 11, wherein in the case that the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

13. The method of claim 1, wherein N is 4, one antenna in each antenna subset.

14. The method of claim 1, wherein the predefined rule comprises: and selecting an antenna subset corresponding to the optimal downlink channel to transmit the SRS according to the downlink channel state information.

15. A method for signaling configuration of Sounding Reference Signals (SRS), comprising:

sending signaling for instructing a terminal to send Sounding Reference Signals (SRS) on N antenna subsets of the terminal according to a predefined rule to the terminal, wherein N is a positive integer, and each antenna subset at least comprises one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

16. The method of claim 15, wherein the predefined rule comprises: when the frequency hopping function of the SRS is not enabled, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN。

17. the method of claim 15, wherein the predefined rule comprises: when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN; or,

18. the method of claim 15, whichCharacterized in that said predefined rules comprise: when the frequency hopping function of the SRS enables and allows the frequency hopping of the number K of the sub-bands to be even and K to be integral multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

19. the method of claim 15, wherein the predefined rule comprises: when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

20. the method according to any of claims 15 to 19, wherein the predefined rule comprises: and determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS.

21. The method according to claim 20, wherein in case the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

22. The method of claim 15, wherein sending signaling to a terminal instructing the terminal to send Sounding Reference Signals (SRS) on N subsets of antennas of the terminal according to a predefined rule comprises:

and sending 1-bit high-layer signaling to the terminal, wherein the 1-bit high-layer signaling is used for indicating whether the SRS is sent on the N antenna subsets of the terminal according to the predefined rule or not.

23. The method of claim 15, wherein sending signaling to a terminal instructing the terminal to send Sounding Reference Signals (SRS) on N subsets of antennas of the terminal according to a predefined rule comprises:

and reusing an antenna selection function in the existing protocol for indicating whether to start the SRS on the two antennas to the terminal, wherein the antenna selection function is used for indicating whether to transmit the SRS on N antenna subsets of the terminal according to the predefined rule to the terminal.

24. The method of claim 15, wherein sending signaling to a terminal instructing the terminal to send Sounding Reference Signals (SRS) on N subsets of antennas of the terminal according to a predefined rule comprises:

and sending 2-bit high-layer signaling to the terminal, wherein the 2-bit high-layer signaling indicates whether the SRS is sent on the N antenna subsets of the terminal according to the predefined rule and the adopted predefined rule to the terminal.

25. The method of claim 15, wherein sending signaling to a terminal instructing the terminal to send Sounding Reference Signals (SRS) on N subsets of antennas of the terminal according to a predefined rule comprises:

and sending 1-bit high-level signaling to the terminal, wherein the 1-bit high-level signaling is used for indicating a predefined rule adopted by the SRS to be sent on the N antenna subsets to the terminal.

26. The method of claim 15, wherein sending signaling to a terminal instructing the terminal to send Sounding Reference Signals (SRS) on N subsets of antennas of the terminal according to a predefined rule comprises:

sending 1-bit high-level signaling to the terminal, wherein the 1-bit high-level signaling is used for indicating whether to enable the aperiodic sounding reference signal to be sent on the N antenna subsets according to a predefined rule;

if the 1-bit high-level signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule, reusing the existing 1-bit physical layer signaling for triggering the aperiodic SRS transmission to perform continuous N times of transmission on the effective SRS resources;

wherein the valid SRS resources refer to SRS resources that can be used to transmit the aperiodic SRS.

27. A transmission apparatus of a sounding reference signal, comprising:

a first transmitting module, configured to transmit sounding reference signals SRS on N antenna subsets according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

28. The apparatus of claim 27, wherein the predefined rule comprises: when the frequency hopping function of the SRS is not enabled, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN。

29. the apparatus of claim 27, wherein the predefined rule comprises: when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN; or,

30. the apparatus of claim 27, wherein the predefined rule comprises: when the frequency hopping function of the SRS enables and allows the frequency hopping of the number K of the sub-bands to be even and K to be integral multiple of 4, the nth_SRSThe transmission day on which the secondary SRS transmission is locatedLine subset index a (n)_SRS) Determined according to the following formula:

or,

31. the apparatus of claim 27, wherein the predefined rule comprises: when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

32. the apparatus of claim 27, wherein the predefined rule comprises: transmitting a periodic SRS over the N subsets of antennas.

33. The apparatus of claim 27, wherein the predefined rule comprises: and transmitting the aperiodic SRS over the N antenna subsets, wherein triggering the aperiodic SRS transmission N times at a time is supported.

34. The apparatus of claim 33, wherein the N aperiodic SRS transmissions are sent over N consecutive uplink transmission symbols in a special subframe.

35. The apparatus according to any of claims 27 to 34, wherein before transmitting sounding reference signals on the N subsets of antennas according to a predefined rule, the apparatus further comprises:

a dividing module for dividing the transmit antennas into the N antenna subsets.

36. The apparatus according to any of claims 27 to 34, wherein before transmitting sounding reference signals on the N subsets of antennas according to a predefined rule, the apparatus further comprises:

a receiving module, configured to receive a signaling on a base station side, where the signaling is used to instruct the SRS to be transmitted on the N antenna subsets according to the predefined rule.

37. The apparatus according to any of claims 27-31, wherein the predefined rule comprises: and determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS.

38. The apparatus of claim 37, wherein the predefined rule comprises, if the frequency hopping function is enabled: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

39. The apparatus of claim 27, wherein N is 4, one antenna in each antenna subset.

40. The apparatus of claim 27, wherein the predefined rule comprises: and selecting an antenna subset corresponding to the optimal downlink channel to transmit the SRS according to the downlink channel state information.

41. An apparatus for signaling configuration of sounding reference signals, comprising:

a second sending module, configured to send, to a terminal, a signaling for instructing the terminal to send sounding reference signals SRS on N antenna subsets of the terminal according to a predefined rule, where N is a positive integer, and each antenna subset includes at least one antenna; the SRS is transmitted on at least two of the N antenna subsets at different times.

42. The apparatus of claim 41, wherein the predefined rule comprises: when the frequency hopping function of the SRS is not enabled, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) According toDetermined by the following formula:

a(n_SRS)＝n_SRSmodN。

43. the apparatus of claim 41, wherein the predefined rule comprises: when the frequency hopping function of the SRS is enabled and the number K of the sub-bands allowing frequency hopping is odd, the nth_SRSA transmit antenna subset index a (n) at which the SRS transmission is next to_SRS) Determined according to the following formula:

a(n_SRS)＝n_SRSmodN; or,

44. the apparatus of claim 41, wherein the predefined rule comprises: when the frequency hopping function of the SRS enables and allows the frequency hopping of the number K of the sub-bands to be even and K to be integral multiple of 4, the nth_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

45. the apparatus of claim 41, wherein the predefined rule comprises: when the sounding reference signal frequency hopping function is enabled and the number K of the sub-bands allowing frequency hopping is even and K is a non-integer multiple of 4_SRSTransmission antenna subset index a (n) at which secondary SRS transmission is located_SRS) Determined according to the following formula:

or,

46. the apparatus according to any of claims 41 to 45, wherein the predefined rule comprises: and determining a transmitting antenna subset index where the SRS is transmitted according to at least the enabling or not of the SRS frequency hopping function and the frequency of transmitting the SRS.

47. The apparatus according to claim 46, wherein in case the frequency hopping function is enabled, the predefined rule comprises: and determining the transmitting antenna subset index where the SRS is transmitted according to at least the number of sub-bands allowing frequency hopping and the number of times of transmitting the SRS.

48. The apparatus of claim 41, wherein the second sending module further comprises:

a first sending unit, configured to send 1-bit high layer signaling to the terminal, where the 1-bit high layer signaling is used to indicate to the terminal whether to send the SRS on the N antenna subsets of the terminal according to the predefined rule.

49. The apparatus of claim 41, wherein the second sending module further comprises:

a first reusing unit, configured to reuse an antenna selection function in an existing protocol, which is used to indicate to the terminal whether to turn on SRS on two antennas, where the antenna selection function is used to indicate to the terminal whether to transmit SRS on N antenna subsets of the terminal according to the predefined rule.

50. The apparatus of claim 41, wherein the second sending module further comprises:

and a second sending unit, configured to send a 2-bit high layer signaling to the terminal, where the 2-bit high layer signaling indicates to the terminal whether to send the SRS on the N antenna subsets of the terminal according to the predefined rule and the adopted predefined rule.

51. The apparatus of claim 41, wherein the second sending module further comprises:

a third sending unit, configured to send 1-bit high layer signaling to the terminal, where the 1-bit high layer signaling is used to indicate, to the terminal, a predefined rule adopted for sending the SRS over the N antenna subsets.

52. The apparatus of claim 41, wherein the second sending module further comprises:

a fourth sending unit, configured to send 1-bit high-level signaling to the terminal, where the 1-bit high-level signaling is used to indicate to the terminal whether to enable aperiodic sounding reference signals to be sent on the N antenna subsets according to a predefined rule;

a second reusing unit, configured to reuse an existing 1-bit physical layer signaling for triggering aperiodic SRS transmission for triggering the aperiodic SRS to perform consecutive N times of transmissions on an effective SRS resource if the 1-bit high layer signaling indicates that the terminal enables the aperiodic sounding reference signal to be transmitted on the N antenna subsets according to a predefined rule;