CN111431677A

CN111431677A - Method and device for receiving and sending reference signals

Info

Publication number: CN111431677A
Application number: CN201910020183.6A
Authority: CN
Inventors: 王瑜新; 鲁照华; 蒋创新; 吴昊; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2020-07-17
Also published as: WO2020143702A1

Abstract

The invention provides a method and a device for receiving and sending a reference signal. The sending method comprises the following steps: the first communication node determines configuration information of a Sounding Reference Signal (SRS) in an uplink subframe according to a configuration signaling and/or a preset rule; and the first communication node receives an SRS according to the configuration information. The invention solves the problems of difficult signaling configuration, selection, triggering and rate matching for the transmission of the uplink channel caused by increasing the SRS, thereby achieving the effect of improving the transmission performance under the condition of capacity expansion of the reference signal.

Description

Method and device for receiving and sending reference signals

Technical Field

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

Background

In long Term Evolution (L ong Term Evolution, abbreviated as L TE), a Physical Downlink Control Channel (PDCCH) is used to carry Downlink Control Information (DCI), wherein the DCI may include uplink and Downlink scheduling information and uplink power Control information, the DCI format (format) is divided into DCI formats 0, 1A, 1B, 1C, 1D, 2A, 3A, etc., and the DCI formats 2B, 2C, 2D are added to a L TE-area 12 (L TE-a version 12) to support various applications and transmission modes.

A Sounding Reference Signal (SRS) is a Signal between a UE and a network side device for measuring radio Channel Information (CSI). In a long term evolution system, a UE (user equipment) transmits an uplink SRS (sounding reference signal) on the last data symbol of a transmission subframe at fixed time according to parameters such as a frequency band, a frequency domain position, a sequence cyclic shift, a period and subframe offset indicated by an eNB (evolved node B). And the eNB judges the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling, closed-loop power control and the like according to the obtained CSI.

In the research of L TE-a Release 10 (L TE-a Release 10), it is proposed that in Uplink communication, a non-precoded SRS, that is, an SRS specific to an antenna should be used, and a Reference Signal (De Modulation Reference Signal, abbreviated as DMRS) for demodulation of a Physical Uplink Shared Channel (PUSCH) is precoded, a network side device can estimate an original CSI of an Uplink by receiving the non-precoded SRS, but the precoded DMRS cannot enable the network side device to estimate the original CSI of the Uplink, at this time, when the UE transmits the non-precoded SRS using multiple antennas, SRS resources required by each UE may increase, that is, the number of UEs that can be multiplexed simultaneously in the system decreases, the UE may transmit SRS resources in two triggering manners, SRS resources are triggered by a trigger type 0 or downlink control information (also referred to as trigger by a trigger type 1), and the utilization rate of the SRS resources is increased in the non-precoded SRS scheduling manner L, based on the downlink control information of the downlink trigger type.

In the study of L TE-a Release 16 (L TE-a Release 16), it is proposed that, in order to enhance the capacity and coverage of SRS, it is considered to introduce multiple SRS symbols to the uplink Normal subframe (Normal subframe), how to perform signaling configuration, selection and triggering on the original conventional SRS symbol (legacy SRS symbol) and the newly added additional SRS symbol (additional SRS symbol) after introducing multiple RS symbols, and how to perform rate matching on the transmission of the uplink channel, and there is no corresponding implementation scheme in the related art.

Disclosure of Invention

Embodiments of the present invention provide a method and an apparatus for receiving and sending a reference signal, so as to at least solve the problem in the related art that it is difficult to perform signaling configuration, selection, triggering, and rate matching for sending an uplink channel due to an increase of an SRS signal.

According to an embodiment of the present invention, a method for receiving a reference signal is provided, in which a first communication node determines configuration information of a Sounding Reference Signal (SRS) in an uplink subframe according to a configuration signaling and/or a preset rule; and the first communication node receives an SRS according to the configuration information.

Optionally, the SRS in the uplink subframe includes at least one of the following: legacy SRS and additional SRS.

Optionally, in a case that the legacy SRS and the additional SRS are simultaneously included in the uplink subframe, the configuration information includes one of: the transmission priority of the additional SRS is greater than the transmission priority of the conventional SRS, the transmission priority of the conventional SRS is greater than the transmission priority of the additional SRS, and the transmission priority of the additional SRS is equal to the transmission priority of the conventional SRS.

Optionally, the determining, by the first communication node, the sending priority of the SRS in the uplink subframe according to a preset rule includes: and determining the sending priority of the SRS according to the subframe index or the subframe set where the downlink control information DCI triggering the SRS is located.

Optionally, determining the sending priority of the SRS according to the subframe index where the downlink control information DCI triggering the SRS is located includes: and the first communication node determines the SRS type triggered by the DCI according to the parity of the subframe index.

Optionally, determining the sending priority of the SRS according to the subframe set where the downlink control information DCI triggering the SRS is located includes: and the first communication node determines the SRS type triggered by the DCI according to the type of the subframe set.

Optionally, the configuration signaling is used to indicate one of: performing rate matching on the last symbol of the uplink subframe by a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH); performing rate matching on the whole uplink subframe by using the PUSCH or PUCCH; and carrying out rate matching on the PUSCH or PUCCH in the first or second time slot of the uplink subframe.

Optionally, the uplink subframe is a subframe of one of the following: subframes that satisfy a subframe period and an offset of the legacy SRS; a subset of subframes that satisfy a subframe period and an offset of the legacy SRS; subframes that satisfy the subframe periods and offsets of the additional SRS.

Optionally, the configuration signaling is cell-specific signaling or user-specific signaling.

Optionally, the configuration signaling is further used to indicate a switch state of an additional SRS function, or indicate whether an additional SRS symbol is included in the uplink subframe.

Optionally, the configuration signaling is used to indicate: when the additional SRS function is off or the uplink subframe does not include the additional SRS symbol, performing rate matching on a PUSCH or PUCCH at the last symbol of the uplink subframe; and when the additional SRS function is on or the uplink subframe comprises the additional SRS symbol, performing rate matching on a PUSCH or PUCCH in a second slot of the uplink subframe.

Optionally, the configuration signaling is used to instruct a plurality of second communication nodes to transmit the legacy SRS and/or the additional SRS.

Optionally, the first communication node configures, to the second communication node through RRC signaling, bits corresponding to signaling for instructing a plurality of the second communication nodes to transmit the legacy SRS and/or the additional SRS and a position in the DCI.

According to another embodiment of the present invention, there is provided a method for transmitting a reference signal, including: the second communication node determines the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule; and the second communication node sends the SRS according to the configuration information.

Optionally, the determining, by the second communication node, the sending priority of the SRS in the uplink subframe according to a preset rule includes: and determining the sending priority of the SRS according to the subframe index or the subframe set where the downlink control information DCI triggering the SRS is located.

Optionally, determining the sending priority of the SRS according to the subframe index where the downlink control information DCI triggering the SRS is located includes: and the second communication node determines the SRS type triggered by the DCI according to the parity of the subframe index.

Optionally, determining the sending priority of the SRS according to the subframe set where the downlink control information DCI triggering the SRS is located includes: and the second communication node determines the SRS type triggered by the DCI according to the type of the subframe set.

Optionally, the configuration signaling is used to indicate: when the additional SRS function is off or the uplink subframe does not include the additional SRS symbol, performing rate matching on a PUSCH or PUCCH at the last symbol of the uplink subframe;

optionally, when the additional SRS function is on, or the uplink subframe includes the additional SRS symbol, the PUSCH or PUCCH is rate-matched in the second slot of the uplink subframe.

Optionally, the configuration signaling is used to instruct a plurality of the second communication nodes to transmit the legacy SRS and/or the additional SRS.

Optionally, the method further comprises: the first communication node configures bits corresponding to signaling for instructing a plurality of second communication nodes to transmit the legacy SRS and/or the additional SRS and positions of the bits in the DCI to the second communication node through RRC signaling.

According to still another embodiment of the present invention, there is also provided a reference signal receiving apparatus in a first communication node, including: the first determining module is used for determining the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule; and the receiving module is used for receiving the SRS according to the configuration information.

According to still another embodiment of the present invention, there is also provided a reference signal transmitting apparatus, in a second communication node, including: the second determining module is used for determining the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule; and a sending module, configured to send an SRS according to the configuration information.

According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.

The invention can solve the problems of difficult signaling configuration, selection, triggering and rate matching for the sending of the uplink channel caused by increasing RS signals, and achieves the effect of improving the transmission performance under the condition of capacity expansion of the reference signal.

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 reference signal receiving method according to an embodiment of the present invention;

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

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

fig. 4 is a block diagram of a reference signal transmitting apparatus 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.

Example 1

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

step S102, a first communication node determines configuration information of a SRS in an uplink subframe according to a configuration signaling and/or a preset rule;

step S104, the first communication node receives SRS according to the configuration information.

It should be noted that if the preset message and the signaling are received simultaneously, and if the type of the reference signal in the preset message is different from the type indicated by the signaling, an alternative selection scheme is to select the reference signal containing the information indicating the maximum number of the received reference signals.

It should be noted that the first communication node in the present embodiment includes, but is not limited to, a base station of a macro cell, a base station or a transmission node of a small cell (small cell), a transmission node in a high frequency communication system, a transmission node in an internet of things system, and other nodes. The second communication node in this embodiment is not only a terminal in the conventional sense, but also a device such as a node in a communication system of a mobile phone, a portable device, an automobile, or the like.

As for the reference signal, although the SRS signal is used in this embodiment, it can be understood that other reference signals, for example, an uplink demodulation reference signal, an uplink signal for performing random access, and a phase tracking reference signal, are also within the protection scope of this embodiment.

It should be noted that the priority of the additional SRS is equal to the priority of the legacy SRS, which means that both the legacy SRS and the additional SRS are transmitted in the uplink subframe.

Optionally, when the first communication node triggers the second communication node to transmit the SRS through the downlink control information DCI, the DCI triggers the additional SRS, or the DCI triggers the conventional SRS and the additional SRS, under the condition that the uplink subframe satisfies both the subframe period and the offset condition of the conventional SRS and the subframe period and the offset condition of the additional SRS.

Specifically, for example, if the subframe index where the DCI triggering the reference signal is located is an even number, this DCI triggers the additional SRS; if the subframe index where the DCI triggering the reference signal is located is an odd number, the DCI triggers the conventional SRS. For another example, if the subframe index where the DCI triggering the reference signal is located is an even number, the DCI triggers the legacy SRS; if the subframe index where the DCI triggering the reference signal is located is odd, the DCI triggers the additional SRS.

Specifically, the type of the subframe set refers to different subframe sets divided for all subframes, such as a first subframe set, a second subframe set, and a third subframe set. For example, if the subframe in which the DCI triggering the reference signal is located falls into the first subframe set, the DCI triggers the additional SRS, and if the subframe in which the DCI triggering the reference signal is located falls into the second subframe set, the DCI triggers the legacy SRS, and if the subframe in which the DCI triggering the reference signal is located falls into the third subframe set, the DCI triggers the legacy SRS and the additional SRS at the same time.

It should be noted that there is no difference in principle between the first subframe set, the second subframe set and the third subframe set. According to actual needs, the priority type corresponding to the subframe set type can be adjusted. Also, the number of subframe sets is not limited, e.g., if there is only one subframe set, then this case is dedicated to triggering a specific SRS. And if there are two, can be used to trigger triggering of the legacy SRS or the additional SRS.

In addition, the transmission priority of the SRS is indicated for the configuration signaling, and the correspondence between the configuration signaling and the bit indication is given in tables 1 and 2 below. As shown in tables 1 and 2:

TABLE 1

Signaling bits	Priority of transmission
		00	Transmitting additional SRS
01	Transmitting legacy SRS
		10	Transmitting additional SRS
11	Transmitting additional and legacy SRS

TABLE 2

Signaling bits	Priority of transmission
		00	Transmitting additional SRS
01	Transmitting legacy SRS
		10	Transmitting additional and legacy SRS
11	Reservation

It should be noted that if the second communication node does not receive the 2-bit signaling, the additional SRS is transmitted by default.

In particular, the switching state of the additional SRS function or the role of the SRS symbol is to determine whether the additional SRS is included in the uplink subframe.

Optionally, the first communication node configures a subframe period and an offset of the additional SRS to the second communication node through RRC signaling, and if the second communication node has a PUSCH or PUCCH to transmit on an uplink subframe satisfying the subframe period and the offset condition of the additional SRS, the second communication node performs rate matching on a first slot and/or a second slot of the uplink subframe.

Optionally, the subframe period and offset of the additional SRS are a subset of the subframe period and offset of the legacy SRS, or independent of the subframe period and offset of the legacy SRS.

Specifically, the DCI includes a bit field of x0x1x2x3x4x5, and if 2 bits of the bits triggering each second communication node are defined, x0x1 is used to trigger the 1 st second communication node, x2x3 is used to trigger the 2 nd second communication node, and x4x5 is used to trigger the 3 rd second communication node.

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 (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a method for sending a reference signal is provided, which has already been described and is not described again. Fig. 2 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:

step S202, the second communication node determines the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

step S204, the second communication node sends SRS according to the configuration information.

Example 3

In this embodiment, a reference signal receiving apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted for brevity. 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 reference signal receiving apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus includes:

a first determining module 32, configured to determine, according to the configuration signaling and/or a preset rule, configuration information of the SRS in the uplink subframe;

a receiving module 34, configured to receive an SRS according to the configuration information.

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 different processors in any combination.

Example 4

In this embodiment, a device for sending a reference signal is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and the description of the device that has been already made is omitted. 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. 4 is a block diagram of a reference signal transmitting apparatus according to an embodiment of the present invention, and as shown in fig. 4, the apparatus includes:

a second determining module 42, configured to determine configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

a sending module 44, configured to send an SRS according to the configuration information.

Example 5

Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:

s1, the first communication node determines the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

s2, the first communication node receives SRS according to the configuration information.

Or the like, or, alternatively,

s1, the second communication node determines the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

and S2, the second communication node sends SRS according to the configuration information.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.

Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:

Or the like, or, alternatively,

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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for receiving a reference signal, comprising:

the first communication node determines configuration information of a Sounding Reference Signal (SRS) in an uplink subframe according to a configuration signaling and/or a preset rule;

and the first communication node receives an SRS according to the configuration information.

2. The method of claim 1, wherein the SRS in the uplink subframe comprises at least one of: legacy SRS and additional SRS.

3. The method of claim 2, wherein in the case that the legacy SRS and the additional SRS are included in the uplink subframe at the same time, the configuration information comprises one of: the transmission priority of the additional SRS is greater than the transmission priority of the conventional SRS, the transmission priority of the conventional SRS is greater than the transmission priority of the additional SRS, and the transmission priority of the additional SRS is equal to the transmission priority of the conventional SRS.

4. The method according to claim 3, wherein the first communication node determines the priority of sending the SRS in the uplink subframe according to a preset rule, and the method comprises the following steps:

and determining the sending priority of the SRS according to the subframe index or the subframe set where the downlink control information DCI triggering the SRS is located.

5. The method of claim 4, wherein determining the sending priority of the SRS according to the subframe index where the Downlink Control Information (DCI) triggering the SRS is located comprises:

and the first communication node determines the SRS type triggered by the DCI according to the parity of the subframe index.

6. The method of claim 4, wherein determining the transmission priority of the SRS according to the subframe set where the downlink control information DCI triggering the SRS is located comprises:

and the first communication node determines the SRS type triggered by the DCI according to the type of the subframe set.

7. The method of claim 1, wherein the configuration signaling is used to indicate one of:

performing rate matching on the last symbol of the uplink subframe by a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH);

performing rate matching on the whole uplink subframe by using the PUSCH or PUCCH;

and carrying out rate matching on the PUSCH or PUCCH in the first or second time slot of the uplink subframe.

8. The method of claim 2, wherein the uplink subframe is one of the following:

subframes that satisfy a subframe period and an offset of the legacy SRS;

a subset of subframes that satisfy a subframe period and an offset of the legacy SRS;

subframes that satisfy the subframe periods and offsets of the additional SRS.

9. The method according to any of claims 1-2,7-8, wherein the configuration signaling is cell-specific signaling or user-specific signaling.

10. The method of claim 1, wherein the configuration signaling is further used to indicate a switch state of an additional SRS function or to indicate whether an additional SRS symbol is included in the uplink subframe.

11. The method of claim 10, wherein the configuration signaling is used to indicate:

when the additional SRS function is off or the uplink subframe does not include the additional SRS symbol, performing rate matching on a PUSCH or PUCCH at the last symbol of the uplink subframe;

and when the additional SRS function is on or the uplink subframe comprises the additional SRS symbol, performing rate matching on a PUSCH or PUCCH in a second slot of the uplink subframe.

12. The method of claim 2, wherein the configuration signaling is used to instruct a plurality of second communication nodes to transmit the legacy SRS and/or the additional SRS.

13. The method of claim 12, further comprising: and the first communication node configures bits corresponding to signaling for instructing a plurality of second communication nodes to transmit the traditional SRS and/or the additional SRS and the position of the bits in the DCI to the second communication node through RRC signaling.

14. A method for transmitting a reference signal, comprising:

the second communication node determines the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

and the second communication node sends the SRS according to the configuration information.

15. The method of claim 14, wherein the SRS in the uplink subframe comprises at least one of: legacy SRS and additional SRS.

16. The method of claim 15, wherein in the case that the legacy SRS and the additional SRS are simultaneously included in the uplink subframe, the configuration information comprises one of: the transmission priority of the additional SRS is greater than the transmission priority of the conventional SRS, the transmission priority of the conventional SRS is greater than the transmission priority of the additional SRS, and the transmission priority of the additional SRS is equal to the transmission priority of the conventional SRS.

17. The method of claim 16, wherein the second communication node determines the priority of SRS transmission in the uplink subframe according to a preset rule, comprising:

18. The method of claim 17, wherein determining the sending priority of the SRS according to the subframe index where the downlink control information DCI triggering the SRS is located includes:

and the second communication node determines the SRS type triggered by the DCI according to the parity of the subframe index.

19. The method of claim 17, wherein determining the priority for sending the SRS according to a subframe set in which downlink control information DCI triggering the SRS is located includes:

and the second communication node determines the SRS type triggered by the DCI according to the type of the subframe set.

20. The method of claim 14, wherein the configuration signaling is used to indicate one of:

21. The method of claim 15, wherein the uplink subframe is one of the following:

subframes that satisfy a subframe period and an offset of the legacy SRS;

subframes that satisfy the subframe periods and offsets of the additional SRS.

22. The method according to any of claims 14-15,20-21, wherein the configuration signaling is cell-specific signaling or user-specific signaling.

23. The method of claim 14, wherein the configuration signaling is further used to indicate a switch status of an additional SRS function or to indicate whether an additional SRS symbol is included in the uplink subframe.

24. The method of claim 23, wherein the configuration signaling is used to indicate:

25. The method of claim 14, wherein the configuration signaling is used to instruct a plurality of second communication nodes to transmit the legacy SRS and/or the additional SRS.

26. The method of claim 25, further comprising: the first communication node configures bits corresponding to signaling for instructing a plurality of second communication nodes to transmit the legacy SRS and/or the additional SRS and positions of the bits in the DCI to the second communication node through RRC signaling.

27. An apparatus for receiving a reference signal, located in a first communication node, comprising:

the first determining module is used for determining the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule;

and the receiving module is used for receiving the SRS according to the configuration information.

28. An apparatus for transmitting a reference signal, located in a second communication node, comprising:

the second determining module is used for determining the configuration information of the SRS in the uplink subframe according to the configuration signaling and/or the preset rule; and a sending module, configured to send an SRS according to the configuration information.

29. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1-14,15-26 when executed.

30. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1-14, 15-26.