WO2019029426A1

WO2019029426A1 - Method and apparatus used for transmitting reference signals

Info

Publication number: WO2019029426A1
Application number: PCT/CN2018/098289
Authority: WO
Inventors: 孙鹏; 郤伟
Original assignee: 维沃移动通信有限公司
Priority date: 2017-08-08
Filing date: 2018-08-02
Publication date: 2019-02-14
Also published as: CN109391391A; CN109391391B

Abstract

Disclosed by the present disclosure are a method and apparatus used for transmitting reference signals. The method comprises: determining first indication information which is used to indicate to a first terminal a time-frequency resource for at least two Channel State Information-Reference Signals (CSI-RS), wherein the at least two CSI-RSes are used for time-frequency tracking; and sending the first indication information to the first terminal.

Description

Method and device for transmitting reference signals

Cross-reference to related applications

The present disclosure claims priority to Chinese Patent Application No. 201710672897.6, filed on Jan. 8, 2017, the entire content of

Technical field

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

Background technique

Problems such as Doppler effect, center frequency offset, phase noise, etc., may cause large frequency offsets and time offsets in the data signals transmitted in the communication system, thereby causing large interference, which in turn leads to degradation of the performance of the communication system, and even can not work. In order to solve this problem, the related technology is mainly based on the tracking reference signal sent by the base station after the user equipment synchronizes according to the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS) sent by the base station. Tracking Reference Signal (TRS) performs time-frequency tracking on the data signals transmitted by the base station to compensate the frequency and time of the signals transmitted in the communication system, and weakens the time domain offset and the frequency domain offset in the communication system.

However, in the LTE system, the terminal performs time-frequency tracking on the data transmitted by the received base station according to a cell-specific reference signal (CRS) sent by the base station, that is, the TRS in the LTE system is a CRS. When the base station sends the CRS to the terminal, it will continue to transmit all the time, resulting in a large amount of signaling overhead and pilot pollution in the entire communication system.

Summary of the invention

In a first aspect, the present disclosure provides a method for transmitting a reference signal, including: determining first indication information, the first indication information being used to indicate at least two Channel State Information (CSI) to a first terminal. The time-frequency resource of the CSI Reference Signal (CSI-RS), the at least two CSI-RSs are used for time-frequency tracking; and the first indication information is sent to the first terminal.

Accordingly, the present disclosure provides an apparatus for transmitting a reference signal, the apparatus may implement the method for transmitting a reference signal of the first aspect, for example, the apparatus may be a network device, in one possible design, The device includes a determining unit and a sending unit, where: a determining unit, configured to determine first indication information, where the first indication information is used to indicate video resources of at least two CSI-RSs, where the at least two CSI-RSs are used for time-frequency And a sending unit, configured to send the first indication information to the first terminal.

Thus, the network device in the present disclosure sends the first indication information to the first terminal, and informs the CSI-RS that is subsequently sent by the first terminal to include the CSI-RS for time-frequency tracking, so that the first terminal receives the After the first indication information, the CSI-RS for time-frequency tracking can be acquired for time-frequency tracking. By using the existing pilot signal, the existing pilot signaling can be reduced according to the existing signaling, and the pilot signal used for other purposes can be used as the time-frequency tracking, which is reduced. Corresponding pilot overhead.

Optionally, in a possible design of the technical solution provided by the first aspect, the first indication information is used to indicate, to the first terminal, time-frequency resources of at least two CSI-RSs in the first CSI-RS resource set. Or the first indication information is used to indicate to the first terminal, the time-frequency resource of the CSI-RS of the at least one CSI-RS group in the second CSI-RS resource set; wherein each CSI-RS group is used for the time-frequency Tracking, each CSI-RS group includes at least two CSI-RSs. The foregoing first CSI-RS resource set includes, but is not limited to, a set of resource configuration information of a CSI-RS, and the foregoing second CSI-RS resource set includes, but not limited to, a CSI-RS of a CSI-RS group. Resource configuration information. Exemplarily, the foregoing first CSI-RS resource set and the second CSI-RS resource set may be a set of CSI-RS resources agreed by the network side and the terminal side in advance by a pre-agreed manner (for example, an existing protocol). The CSI-RS resource set of the CSI-RS for acquiring channel state information configured for the terminal in advance for the network device may also be used.

Further, the foregoing first indication information is used to indicate, to the first terminal, an identifier of at least two CSI-RSs in the first CSI-RS resource set, where the identifier of the CSI-RS is used to indicate a time frequency of the CSI-RS. The first indication information is used to indicate to the first terminal the group number of the at least one CSI-RS group in the second CSI-RS resource set, where the group number of the CSI-RS group is used to indicate the CSI of the CSI-RS group. -RS time-frequency resources.

For example, the resource configuration information of the foregoing CSI-RS includes at least one of the following information: a period of a CSI-RS, a subframe offset value of a CSI-RS, and a resource block (RB) occupied by a CSI-RS. Location, the number of resource unit REs occupied by the CSI-RS in the RB, the number of antenna ports of the CSI-RS, the sequence initialization parameters of the CSI-RS, and the pattern information of the RE occupied by the CSI-RS to carry the CSI-SR Carrier type.

Optionally, in the first aspect or any possible design of the first aspect, the first indication information in the disclosure includes: pattern information of the at least two CSI-RSs (Resource Element, RE) .

Optionally, in any one of the first aspect or the first aspect, the technical solution provided by the first aspect further includes: sending an indication information directly to the first terminal, to indicate at least two pre-configured CSIs. -RS and instruct it to be used for time-frequency tracking. For example, the first indication information in the technical solution includes: resource configuration information of a CSI-RS corresponding to the at least two CSI-RSs, where the resource configuration information of the CSI-RS is used to indicate at least two pre-configured CSIs. -RS and instruct it to be used for time-frequency tracking.

Optionally, in any one of the possible aspects of the first aspect or the first aspect, the technical solution provided by the first aspect further includes: the network device may further select at least two CSI-RSs before determining the first indication information. , thereby reducing the overhead of notification signaling. Correspondingly, in one possible design, the device further comprises a selection unit. Wherein: the selection unit is used to select at least two CSI-RSs. Exemplarily, the network device may select at least two CSI-RSs according to a predetermined rule, where the predetermined rule may satisfy at least one of the following conditions: the frequency domain density is greater than or equal to X (X>=1), the network device antenna The number of ports is less than or equal to Y (Y<=4), and the number of symbols in the time domain is less than or equal to Z (Z<=2).

Optionally, in the first aspect or any one of the foregoing possible configurations, the technical solution provided by the first aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, to reduce the correspondence. Pilot overhead. Specifically, the technical solution further includes at least one of the following: the solution A: sending the second indication information to the second terminal; the solution B: sending the third indication information to the third terminal; and the scenario C: sending the fourth terminal to the fourth terminal Four instructions. Correspondingly, in a possible design, the sending unit is further configured to implement at least one of the following steps: Step A: sending second indication information to the terminal; Step B: transmitting third indication information to the terminal; Step C : Send the fourth indication information to the terminal. The second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs. The third indication information is used to indicate that the third terminal is configured according to any one of the at least two CSI-RSs. The RS performs beam management; the foregoing fourth indication information is used to instruct the fourth terminal to acquire channel state information according to any CSI-RS of the at least two CSI-RSs.

In a second aspect, the present disclosure provides a method for transmitting a reference signal, including: receiving first indication information, where the first indication information is used to indicate, to a first terminal, time-frequency resources of at least two CSI-RSs, where At least two CSI-RSs are used for time-frequency tracking; at least two CSI-RSs are determined according to the first indication information. Accordingly, the present disclosure is an apparatus for transmitting a reference signal, the apparatus may implement the method for transmitting a reference signal of the second aspect, for example, the apparatus may be a terminal, and in one possible design, the apparatus includes a receiving unit and a determining unit, wherein: the receiving unit is configured to receive first indication information, where the first indication information is used to indicate time-frequency resources of at least two CSI-RSs to the first terminal, and the determining unit is configured to use, according to the first The indication information determines at least two CSI-RSs.

Optionally, in a possible design of the technical solution provided by the second aspect, the technical solution provided by the second aspect further includes: determining a first CSI-RS resource set, where the foregoing first indication information is used to Determining, by the first terminal, a time-frequency resource of at least two CSI-RSs in the first CSI-RS resource set; or determining a second CSI-RS resource set, where the foregoing first indication information is used to indicate to the first terminal a time-frequency resource of a CSI-RS of at least one CSI-RS group in the second CSI-RS resource set; wherein each CSI-RS group is used for time-frequency tracking, and each CSI-RS group includes at least two CSIs -RS. Correspondingly, in a possible design, the determining unit is further configured to determine a first CSI-RS resource set or a second CSI-RS resource set. Exemplarily, the foregoing first CSI-RS resource set and the second CSI-RS resource set are CSI-RS sets that are agreed in advance by the network side and the terminal side in a pre-agreed manner (for example, an existing protocol). A CSI-RS resource set of a CSI-RS for acquiring channel state information configured for a terminal in advance for a network device.

Optionally, in any one of the possible aspects of the second aspect or the second aspect, the technical solution provided by the second aspect further includes: performing time-frequency on the data sent by the received network device according to the at least two CSI-RSs track. Correspondingly, in a possible design, the apparatus further includes: a time-frequency tracking unit, configured to perform time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.

Optionally, in any one of the possible aspects of the second aspect or the second aspect, the technical solution provided by the second aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, for example, rate matching To reduce the corresponding pilot overhead. Specifically, the technical solution further includes: receiving second indication information, where the second indication information is used to indicate that the terminal performs rate matching according to the at least two CSI-RSs, and performs rate matching according to the second indication information and the at least two CSI-RSs. . Correspondingly, in a possible design, the receiving unit is further configured to receive second indication information, where the second indication information is used to indicate that the terminal performs rate matching according to the at least two CSI-RSs; the terminal further includes: a rate And a matching unit, configured to perform rate matching according to the second indication information and the at least two CSI-RSs.

Optionally, in the second aspect or any possible design of the second aspect, the technical solution provided by the second aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, for example, beam management. To reduce the corresponding pilot overhead. Specifically, the technical solution further includes: receiving third indication information, where the third indication information is used to indicate that the terminal performs beam management according to any one of the at least two CSI-RSs, according to the third indication information, and Beam management is performed on any of the at least two CSI-RSs. Correspondingly, in a possible design, the receiving unit is further configured to receive third indication information, where the third indication information is used to indicate that the terminal performs beam management according to any one of the at least two CSI-RSs. The apparatus further includes: a beam management unit, configured to perform beam management according to the third indication information and any one of the at least two CSI-RSs.

Optionally, in any one of the possible aspects of the second aspect or the second aspect, the technical solution provided by the second aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, for example, a channel state. Information acquisition to reduce the corresponding pilot overhead. The technical solution further includes: receiving fourth indication information, the fourth indication information is used to instruct the terminal to acquire channel state information according to any CSI-RS in the at least two CSI-RSs, according to the fourth indication information and the at least two CSIs - Any CSI-RS in the RS acquires channel state information. Correspondingly, in a possible design, the receiving unit is further configured to receive fourth indication information, where the fourth indication information is used to indicate that the terminal acquires a channel state according to any one of the at least two CSI-RSs. The device further includes: a channel detecting unit, configured to acquire channel state information according to the fourth indication information and any CSI-RS of the at least two CSI-RSs.

In a third aspect, a method for transmitting a reference signal includes: determining a time-frequency resource of at least two CSI-RSs in a preset third CSI-RS resource set, or determining a pre-configured fourth CSI a time-frequency resource of a CSI-RS in at least one CSI-RS group in the RS resource set, wherein each CSI-RS group includes at least two CSI-RSs; using time-frequency resources of the at least two CSI-RSs The first terminal transmits a CSI-RS, wherein the CSI-RS is used for time-frequency tracking. Accordingly, the present disclosure provides an apparatus for transmitting a reference signal, the apparatus may implement the method for transmitting a reference signal of the first aspect, for example, the apparatus may be a network device, in one possible design, The apparatus includes a determining unit and a sending unit, where: the determining unit is configured to determine a time-frequency resource of at least two CSI-RSs in the preset third CSI-RS resource set, or to determine a pre-configured fourth CSI a time-frequency resource of a CSI-RS in at least one CSI-RS group in the RS resource set; wherein each CSI-RS group includes at least two CSI-RSs; a transmitting unit for using at least two CSI-RSs The time-frequency resource sends a CSI-RS to the first terminal; wherein the CSI-RS is used for time-frequency tracking.

After the network side in the present disclosure determines the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set, the CSI-RS may be sent to the first terminal according to the time-frequency resource. Since these CSI-RSs are pre-agreed CSI-RSs on the network side and the terminal side, the network side does not need to send indication information to the terminal side for indication.

Optionally, in a possible design of the third aspect, the technical solution provided by the third aspect further includes: determining the time-frequency resource of the at least two CSI-RSs in the preset third CSI-RS resource set. The method includes: determining, according to the network parameter information, a time-frequency resource of at least two CSI-RSs in the third CSI-RS resource set; or determining the at least one CSI-RS in the pre-configured fourth CSI-RS resource set. The time-frequency resource of the CSI-RS in the group includes: determining, according to the network parameter information, a time-frequency resource of at least two CSI-RSs in the third CSI-RS resource set. Correspondingly, in a possible design, when determining the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set, the determining unit is specifically configured to: determine, according to the network parameter information, the advance a time-frequency resource of at least two CSI-RSs in the configured third CSI-RS resource set; or the determining unit determines CSI-RS in at least one of the pre-configured fourth CSI-RS resource sets The time-frequency resource is specifically configured to: determine time-frequency resources of the CSI-RS in the at least one CSI-RS group in the pre-configured fourth CSI-RS resource set according to the network matching information. The network parameter information includes at least one of the following information: a cell ID of a cell managed by the network device, and a mapping relationship between the cell and a time-frequency resource of the CSI-RS, where the cell of the cell managed by the network device is located The mapping between the area ID and the time-frequency resource of the area and the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.

Optionally, in any one of the possible aspects of the third aspect or the third aspect, the technical solution provided by the third aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, for example, rate matching , beam management, channel state information acquisition to reduce the corresponding pilot overhead. For specific implementation, refer to the related description of the first aspect, and details are not described herein again.

In a fourth aspect, the disclosure provides a method for transmitting a reference signal, including: determining a time-frequency resource of at least two CSI-RSs in a preset third CSI-RS resource set, or determining a pre-configured Time-frequency resources of CSI-RSs in at least one CSI-RS group in the fourth CSI-RS resource set, wherein each CSI-RS group includes at least two CSI-RSs; time-frequency using at least two CSI-RSs The resource receives a CSI-RS, wherein the CSI-RS is used for time-frequency tracking. Accordingly, the present disclosure provides an apparatus for transmitting a reference signal, the apparatus may implement the method for transmitting a reference signal of the first aspect, for example, the apparatus may be a terminal, and in one possible design, the terminal a determining unit and a receiving unit, where: a determining unit, configured to determine a unit, configured to determine a time-frequency resource of at least two CSI-RSs in a preset third CSI-RS resource set, or determine a pre-configured first a time-frequency resource of a CSI-RS in at least one CSI-RS group of the four CSI-RS resource sets, wherein each CSI-RS group includes at least two CSI-RSs; and a receiving unit that uses at least two CSI- The time-frequency resource of the RS receives the CSI-RS, wherein the CSI-RS is used for time-frequency tracking.

Optionally, in a possible design of the fourth aspect, the technical solution provided by the fourth aspect further includes: determining the time-frequency resource of the at least two CSI-RSs in the preset third CSI-RS resource set. The method includes: determining time-frequency resources of at least two CSI-RSs in the third CSI-RS resource set according to the network parameter information; determining the at least one CSI-RS group in the pre-configured fourth CSI-RS resource set The time-frequency resource of the CSI-RS includes: determining, according to the network parameter information, a time-frequency resource of at least two CSI-RSs in the third CSI-RS resource set. Correspondingly, in a possible design, when determining the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set, the determining unit is specifically configured to: determine, according to the network parameter information, Time-frequency resources of at least two CSI-RSs in the three CSI-RS resource sets; or, when the determining unit determines the CSI-RSs in at least one of the pre-configured fourth CSI-RS resource sets The frequency resource is specifically configured to: determine time-frequency resources of at least two CSI-RSs in the third CSI-RS resource set according to the network parameter information. The network parameter information includes at least one of the following information: a serving cell ID of the first terminal, and a mapping relationship between the cell and the time-frequency resource of the CSI-RS, and an area ID of the area where the server cell of the first terminal is located. And a mapping relationship between the area and the time-frequency resource of the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.

Optionally, in any one of the possible configurations of the fourth aspect or the fourth aspect, the technical solution provided by the fourth aspect further includes: performing time-frequency on the data sent by the received network device according to the at least two CSI-RSs track. Correspondingly, in a possible design, the apparatus further includes: a time-frequency tracking unit, configured to perform time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.

Optionally, in a possible design of the fourth aspect, the technical solution provided by the fourth aspect further includes: using the CSI-RS for time-frequency tracking for other purposes, for example, rate matching, beam management, and channel Status information is obtained to reduce the corresponding pilot overhead. For a specific implementation, refer to the related description of the second aspect, and details are not described herein again.

It should be noted that the first terminal, the second terminal, the third terminal, and the fourth terminal in the disclosure may be the same terminal, or may be different terminals, which is not limited in this disclosure.

Any of the devices provided by the first aspect, the second aspect, the third aspect, and the fourth aspect may implement the above method by software, hardware, or by executing corresponding software by hardware. The apparatus can include a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the methods of the corresponding aspects described above. The memory is for coupling with a processor that holds the programs and data necessary for the device. Additionally, the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements. The communication interface can be a transceiver.

The present disclosure also provides a computer storage medium having stored thereon a computer program that, when executed on a computer, causes the computer to perform the method of any of the above aspects.

The present disclosure also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.

The present disclosure also provides a communication chip in which instructions are stored that, when run on a network device or terminal, cause the network device or terminal to perform the methods described in the various aspects above.

It is to be understood that any of the devices or computer storage media or computer program products provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the beneficial effects in the corresponding methods. , will not repeat them here.

DRAWINGS

FIG. 1 is a structural diagram of a communication system to which the technical solution provided by the embodiment of the present disclosure is applied;

FIG. 2 is a schematic flowchart diagram of a method for transmitting a reference signal according to an embodiment of the present disclosure;

FIG. 3 is a pilot diagram provided by an embodiment of the present disclosure;

FIG. 4 is another pilot diagram provided by an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of still another method for transmitting a reference signal according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart diagram of another method for transmitting a reference signal according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart diagram of still another method for transmitting a reference signal according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart diagram of another method for transmitting a reference signal according to an embodiment of the present disclosure.

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure.

Detailed ways

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship; in the formula, the character "/" indicates that the contextual object is a "divide" relationship. . Unless otherwise stated, "multiple" in this document refers to two or more.

In order to facilitate the clear description of the technical solutions of the embodiments of the present disclosure, in the embodiments of the present disclosure, the words "first", "second", etc. are used to distinguish the same or similar items whose functions or functions are substantially the same, in the field. The skilled person will understand that the words "first", "second" and the like do not limit the number and order of execution.

It should be noted that, in the embodiments of the present disclosure, the words "exemplary" or "such as" are used to mean an example, an illustration, or a description. Any embodiment or design described as "exemplary" or "for example" in the disclosed embodiments should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the words "exemplary" or "such as" is intended to present the concepts in a particular manner.

It should be noted that, in the embodiments of the present disclosure, the meaning of "a plurality" means two or more unless otherwise stated.

It should be noted that, in the embodiments of the present disclosure, "(English: of)", "corresponding (relevant)" and "corresponding" may sometimes be mixed. It should be noted that When the difference is not emphasized, the meaning to be expressed is the same.

The technical solutions provided by the present disclosure can be applied to various communication systems, for example, a 5G communication system, a future evolution system, or a plurality of communication fusion systems, and the like. Can include a variety of application scenarios, such as machine to machine (M2M), D2M, macro communication, enhanced mobile broadband (eMBB), ultra high reliability and ultra low latency communication (ultra Reliable & low latency communication (uRLLC) and massive machine type communication (mMTC) scenarios. These scenarios include, but are not limited to, communication between the terminal and the terminal, or communication between the network device and the network device, or communication between the network device and the terminal. Embodiments of the present disclosure may be applied to communication with a network device and a terminal in a 5G communication system, or communication between a terminal and a terminal, or communication between a network device and a network device.

FIG. 1 is a schematic diagram showing a possible structure of a communication system according to an embodiment of the present disclosure. As shown in FIG. 1, the communication system includes at least one network device 100 (only one is shown in FIG. 1) and one or more terminals 200 to which each network device 100 is connected. The network device 100 may be a base station, a core network device, a transmission reference point (TRP), a relay station, or an access point. The network device 100 may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, or may be a broadband The NB (NodeB) in the code division multiple access (WCDMA) may also be an eNB or an eNodeB (evolutional NodeB) in LTE. The network device 100 may also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device 100 may also be a network device in a 5G communication system or a network device in a future evolved network; it may also be a wearable device or an in-vehicle device or the like.

The terminal 200 can be a wireless terminal or a wired terminal, and the wireless terminal can be a device that provides voice and/or other service data connectivity to the user, a handheld device with wireless communication capabilities, a computing device, or other processing connected to the wireless modem. Devices, in-vehicle devices, wearable devices, terminals in future 5G networks, or terminals in a future evolved PLMN network. The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. For example, it can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network, as well as personal communication service (PCS) phones, cordless phones. a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), etc., and the wireless terminal can also be a mobile device or a user device ( User equipment, UE), UE terminal, access terminal, wireless communication device, terminal unit, terminal station, mobile station, mobile station, remote station (Remote Station), remote station, remote terminal (Remote) Terminal), Subscriber Unit, Subscriber Station, User Generation (User Agent), the terminal device and the like. The above is merely an example, and the actual application is not limited thereto.

In order to maintain the traffic transmission in the communication system and alleviate the time offset and frequency offset of the signals transmitted in the communication system, the user equipment needs to perform the synchronization operation according to the reference signal sent by the network device. The synchronization is further divided into initial coarse synchronization and time-frequency tracking fine synchronization, and the initial coarse synchronization is performed according to a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) sent by the base station, and The reference signal used for time synchronization tracking (Time/Frequency Tracking) is called Tracking Reference Signal (TRS). For example, in the LTE system, the TRS for time-frequency tracking is CRS. Specifically, the time-frequency tracking can be divided into two parts according to the time domain and the frequency domain: 1) time domain tracking and delay spread estimation: the tracking range depends on the frequency domain density of the TRS, and the tracking accuracy depends on the frequency domain bandwidth of the TRS; Frequency domain tracking and Doppler spread estimation: The tracking range depends on the time domain density of the TRS, and the tracking accuracy depends on the time domain period of the TRS.

The present disclosure implements time-frequency tracking by constructing a new TRS using existing reference signals (ie, pilot signals). However, it should be noted that the CSI-RS used in the present disclosure for constructing a new TRS is only one possible way for other existing pilot signals (eg, CRS, reduced cell-specific reference signals). (Reduced CRS, RCRS), PSS, SSS, PRS) can also be used to construct TRS.

It should be noted that the construction process of constructing a new TRS using the existing pilot signals in the present disclosure does not perform any processing on the original pilot signals, but only by transmitting at least two pilot signals in the time domain at the time of transmission. The aggregation is performed, so that the opposite terminal performs time-frequency tracking according to the received at least two pilot signals. The essence is simply to transmit at least two pilot signals as TRS.

The technical solutions provided by the present disclosure will be described from the perspective of a reference signal transmission method in conjunction with the drawings of the embodiments of the present disclosure. It is apparent that what is described is a part of the embodiments of the present disclosure, and not all of the embodiments. It should be noted that some or all of the technical features of any of the various technical solutions provided below may be combined to form a new technical solution without conflict.

Embodiment 1:

FIG. 2 is a schematic flow chart of a method for transmitting a reference signal provided by the present disclosure. The method specifically includes:

S201. The network device determines first indication information.

S202. The network device sends the first indication information to the first terminal.

Correspondingly, the peer first terminal receives the first indication information.

The foregoing network device may be a network device in the communication system shown in FIG. 1, for example, a base station; and the foregoing first terminal may be a terminal device in the communication system shown in FIG. 1.

The first indication information in the disclosure is used to indicate to the first terminal time-frequency resources of at least two CSI-RSs, and the at least two CSI-RSs are used for time-frequency tracking. For example, the first indication information is specifically used to indicate that the first terminal performs time-frequency tracking using the received tracking reference signal (ie, the disclosure indicates that at least two CSI-RSs indicated by the first indication information are TRS) until receiving. Go to the next tracking reference signal.

It should be understood that the reference signal used for time-frequency tracking carried on the sub-carrier is referred to as a tracking reference signal in the present disclosure, that is, the present disclosure refers to at least two CSI-RSs used for time-frequency tracking as a time-frequency tracking signal. The tracking reference signal in the present disclosure is commanded according to the inherent logic function of the reference signal. Therefore, the tracking reference signal in the present disclosure may have other names, and the name cannot be defined as an embodiment of the present disclosure.

When the base station in the LTE system sends the CRS to the UE for time-frequency tracking, it will continue to transmit continuously, resulting in a large amount of signaling overhead and pilot pollution in the entire communication system. If you design a new TRS for time-frequency tracking, you need to design a new pilot model or pattern, and use new signaling to notify, which introduces a large reference signal overhead, further reducing the efficiency of resource utilization. At the same time, the new pilot signal cannot be taken with other pilot signals, it can only be used as time-frequency tracking, and other functions cannot be implemented.

Thus, the network device in the present disclosure sends the first indication information to the terminal to notify the terminal that the CSI-RS sent by the terminal includes the CSI-RS for time-frequency tracking, so that the terminal according to the received first indication information. The CSI-RS for time-frequency tracking can be acquired for time-frequency tracking. By using the existing pilot signal, the corresponding pilot overhead can be reduced according to the existing signaling notification, and the pilot signal used for other purposes can also be used as the time-frequency tracking, which reduces the correspondence. Pilot overhead.

Optionally, when determining the first indication information, the following two implementation manners may be determined. specific:

Mode 1: The first indication information sent by the network device includes: resource configuration information of CSI-RS corresponding to at least two CSI-RSs for time-frequency tracking. The resource configuration information of the CSI-RS is used to indicate at least two CSI-RSs and is indicated for time-frequency tracking. For example, it is assumed that the base station selects CSI-RS1 and CSI-RS2 to jointly perform time-frequency tracking, and the CSI-RS transmitted by the base station to the terminal does not include CSI-RS1 dedicated to channel state information acquisition. A pilot map of a CSI-RS transmitted by a base station to a terminal, the pilot map including only CSI-RS1 and CSI-RS2 for time-frequency tracking.

For example, it is assumed that the base station selects CSI-RS1 and CSI-RS2 to jointly perform time-frequency tracking, and the CSI-RS transmitted by the base station to the terminal does not include CSI-RS1 dedicated to channel state information acquisition. A pilot map of a CSI-RS transmitted by a base station to a terminal, the pilot map including only CSI-RS1 and CSI-RS2 for time-frequency tracking.

Manner 2: The network side may directly send the first indication information to the terminal to indicate at least two pre-configured CSI-RSs, and indicate them for time-frequency tracking.

For example, the first indication information is used to indicate to the first terminal, the time-frequency resource of the at least two CSI-RSs in the first CSI-RS resource set; or the first indication information is used to indicate the second terminal to the first terminal. A time-frequency resource of a CSI-RS of at least one CSI-RS group in the CSI-RS resource set. Each CSI-RS group is used for time-frequency tracking, and each CSI-RS group includes at least two CSI-RSs. In the mode 1, the foregoing first CSI-RS resource set and the second CSI-RS resource set are existing existing network device configured for the first terminal for acquiring channel state information (or other uses, such as beam management). The CSI-RS resource set of the CSI-RS, because the CSI-RS resource set is a CSI-RS resource set of the CSI-RS that the network device is configured for the first terminal. Therefore, the disclosure may directly send the first indication information to the first terminal to indicate the pre-configured at least two CSI-RSs, and indicate that they are used for time-frequency tracking, and the terminal may be in the first indication information after receiving the first indication information. The configured CSI-RS resource set searches for the corresponding time-frequency resource to receive the CSI-RS for time-frequency tracking, and does not need to configure a dedicated TRS time-frequency resource for the first terminal, and can directly use the network side as the medium time. Frequency resources, reducing signaling overhead.

For example, refer to the pilot map of the CSI-RS transmitted by the base station to the terminal shown in FIG. 4, where the pilot map embodies the RE positions of the four CSI-RS1s, that is, the base station sends the channel status information to the terminal. There are 4 CSI-RS1s (ie, CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4), where CSI-RS1 and CSI-RS2 are CSI-RSs selected by the base station for time-frequency tracking.

In an example, the first indication information includes: pattern information of the occupied REs of the at least two CSI-RSs.

Manner 3: The network side and the terminal test pre-configure the CSI-RS resource set for the two parties according to the agreed manner, and then send the first indication information to instruct the terminal to find the corresponding CSI-RS from the pre-configured CSI-RS resource set. Time-frequency resources.

For example, the foregoing first indication information is used to indicate, to the first terminal, time-frequency resources of at least two CSI-RSs in the first CSI-RS resource set; or, the first indication information is used to indicate to the first terminal. a time-frequency resource of a CSI-RS of at least one CSI-RS group in the second CSI-RS resource set, wherein each CSI-RS group is used for time-frequency tracking, and each CSI-RS group includes at least two CSI- RS. In the mode 2, the foregoing first CSI-RS resource set and the second CSI-RS resource set are: the network side and the terminal measure a CSI-RS resource set pre-configured according to a predetermined manner (eg, an existing protocol), Therefore, the network device may directly send the first indication information to the terminal to indicate which CSI-RSs or CSI-RS groups in the CSI-RS set configured by the pre-configured CSI-RS resource set are used for time-frequency tracking.

Further, the first indication information in the foregoing manners 1 and 2 is used to indicate, to the first terminal, an identifier of at least two CSI-RSs in the first CSI-RS resource set, where the identifier of the CSI-RS is used. The time-frequency resource indicating the CSI-RS. The first indication information in the foregoing manners 1 and 2 is used to indicate, to the first terminal, a group number of at least one CSI-RS group in the second CSI-RS resource set; wherein the group number of the CSI-RS group is used A time-frequency resource indicating a CSI-RS of the CSI-RS group.

The resource configuration information of the CSI-RS included in the first CSI-RS resource set and the second CSI-RS resource set includes at least one of the following: a period of the CSI-RS, and a subframe of the CSI-RS. Offset value, location of occupied RB of CSI-RS, number of resource unit REs occupied by RRC in CSI-RS, number of antenna ports of CSI-RS, sequence initialization parameters of CSI-RS, CSI-RS occupation The pattern information of the RE to carry the carrier type of the CSI-SR. The period of the CSI-RS and the subframe offset value may be used to indicate the subframe information occupied by the CSI-RS. Optionally, the subframe information occupied by the CSI-RS may be represented by a bit mapping manner. For example, 1 and 0 respectively indicate that there is a CSI-RS on one subframe and no CSI-RS on one subframe. Alternatively, the number of bits may be 5, 10, 20 or 40, and the like. However, the present disclosure is not limited to this. The pattern information of the RE occupied by the CSI-RS includes the pattern index of the RE occupied by the CSI-RS, so that the terminal can determine the RE occupied by the CSI-RS in one RB according to the pattern index and the preset pattern, but The present disclosure is not limited to this.

Certainly, the network side and the terminal side may preset the partial resource configuration information of the CSI-RS. For example, the CSI-RS may be preset to occupy a few RBs of the system bandwidth, or the period or the occupied CSI-RS may be preset. The number of RBs, and so on. Correspondingly, the network side and the terminal side may preset at least one pattern of REs occupied by the CSI-RS in one RB.

Optionally, when the network device in the present disclosure selects at least two CSI-RSs for time-frequency tracking, the network device may select according to a preset rule, thereby reducing the overhead of the notification signaling. The preset rule for the CSI-RS that selects the time-frequency tracking can be preset, for example, set in advance by a protocol, or configured in advance by signaling. Exemplarily, the preset rule may satisfy at least one of the following conditions: the frequency domain density is greater than or equal to X (X>=1), the number of network side antenna ports is less than or equal to Y (Y<=4), and the time domain symbol The number is less than or equal to Z (Z <= 2). Certainly, the foregoing predetermined rules are only an example. In an actual application, as long as the CSI-RS that can satisfy the condition of reducing the signaling overhead is selected, it is not limited herein.

S203. The network device sends at least two CSI-RSs to the first terminal.

Each CSI-RS sent by the network device corresponds to one precoding matrix information, and each precoding matrix information may be beam information of the CSI-RS, and the terminal may implement beam management, channel state information acquisition, and channel information based on the beam information. Rate matching. For example, when the network device sends at least two CSI-RSs to the first terminal, at least one set of reference signals may be sent to the terminal in N time units in one time unit, and each set of reference signals includes time-frequency tracking. At least two CSI-RSs. The foregoing time unit set may be a restricted measurement subframe set configured by the network device for the terminal, and the network device sends, to the UE, the M sets of reference signals in the N subframes in the restricted measurement subframe set, where the N The subframes may be N consecutive subframes or N consecutive subframes, which are not limited herein. Specifically, the base station sends at least one set of reference signals to the terminal in each subframe, and after receiving the reference signal, the terminal performs corresponding time-frequency tracking, beam management, channel state information acquisition, and the like according to the reference signal in the subframe. Rate matching.

S204. The first terminal determines, according to the first indication information, at least two CSI-RSs.

Exemplarily, the terminal determines, according to the received first indication information, the location of the RE occupied by the at least two CSI-RSs for time-frequency tracking, and receives the at least two CSI-RSs based on the location of the occupied RE.

S205. The first terminal performs time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.

In an example, after receiving the at least two CSI-RSs for time-frequency tracking, the terminal selects any two CSI-RSs from the CSI-RSs, and then determines the two CSI-RSs. Phase deviation and time interval, then, based on the phase deviation and time interval between the two CSI-RSs, estimate the corresponding frequency deviation, and perform joint time-offset estimation on the two CSI-RSs to estimate the corresponding Time deviation, finally, frequency compensation based on the estimated frequency deviation, time offset based on the estimated time deviation, thereby completing time-frequency tracking, real-time frequency synchronization, eliminating interference, thereby enabling normal communication between the network device and the terminal To improve the user experience.

In addition, the network test can also use the CSI-RS for time-frequency tracking for other purposes to reduce the corresponding pilot overhead. For example, rate matching, beam management, and channel state information acquisition.

Embodiment 2:

FIG. 5 is a schematic flow chart of a method for transmitting a reference signal provided by the present disclosure. The method specifically includes:

S301. The network device determines time-frequency resources of at least two CSI-RSs in the preset third CSI-RS resource set, or determines at least one CSI-RS group in the pre-configured fourth CSI-RS resource set. A time-frequency resource of a CSI-RS, wherein each CSI-RS group includes at least two CSI-RSs.

S302. The network device sends the CSI-RS to the first terminal by using the time-frequency resources of the at least two CSI-RSs. The CSI-RS is used for time-frequency tracking.

Optionally, determining, in the foregoing step S301, the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set includes:

S301a. The network device determines, according to the network parameter information, a time-frequency resource of at least two CSI-RSs in the preset third CSI-RS resource set.

Optionally, the time-frequency resource of the CSI-RS in the at least one CSI-RS group in the fourth CSI-RS resource set that is configured in the foregoing step S301 is:

S301b: The network device determines a time-frequency resource of the CSI-RS in the at least one CSI-RS group in the pre-configured fourth CSI-RS resource set according to the network matching information.

The parameter information in the foregoing S301a and S301b includes at least one of the following: a cell ID of a cell managed by the network device, and a mapping relationship between the cell and a time-frequency resource of the CSI-RS, and a cell of the cell managed by the network device. The area ID of the area and the mapping relationship between the area and the time-frequency resource of the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.

S303. The first terminal determines a time-frequency resource of at least two CSI-RSs in the preset third CSI-RS resource set, or determines at least one CSI-RS group in the pre-configured fourth CSI-RS resource set. A time-frequency resource of a medium CSI-RS; wherein each CSI-RS group includes at least two CSI-RSs.

S304. The first terminal receives the CSI-RS by using time-frequency resources of the at least two CSI-RSs, where the CSI-RS is used for time-frequency tracking.

Optionally, determining the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set in the foregoing step S303, including:

S303a. The first terminal determines time-frequency resources of at least two CSI-RSs in the third CSI-RS resource set according to the network parameter information.

The optional time-frequency resource of the CSI-RS in the at least one CSI-RS group in the fourth CSI-RS resource set, which is included in the foregoing step S303, includes:

S303b: The first terminal determines time-frequency resources of at least two CSI-RSs in the fourth CSI-RS resource set according to the network parameter information.

The network parameter information in step S303a and step S303b includes at least one of the following information: a serving cell ID of the first terminal, and a mapping relationship between the cell and the time-frequency resource of the CSI-RS, where the server cell of the terminal is located. The area ID and the mapping relationship between the area and the time-frequency resource of the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.

In an example, if the second CSI-RS resource set includes only one CSI-RS group, the number of CSI-RS resources in the CSI-RS set configured corresponding to the second CSI-RS resource set is 1. And determining, according to the foregoing CSI-RS resource quantity 1, a unique CSI-RS group included in the second CSI-RS resource set is a CSI-RS group used for time-frequency tracking. In this scenario, the network device does not need to send the first indication information to the terminal side for indication.

305. The first terminal performs time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.

For the description, step S302 in this embodiment may refer to step S203 in the embodiment. For the step S305 in this embodiment, reference may be made to the step S205 of the embodiment. That is, the description related to the first embodiment of the present embodiment can refer to the content in the embodiment, and details are not described herein again.

Embodiment 3:

FIG. 6 is a schematic flowchart diagram of another method for transmitting a reference signal according to the present disclosure. In the third embodiment, when the network device needs to perform actual scheduling on the terminal, the terminal may be instructed to use the time-frequency tracking. CSI-RS performs rate matching.

As shown in FIG. 6, the steps S201-S204 in the first embodiment are referred to, or the steps S301-S304 in the second embodiment are referenced. On the basis of the method, the method further includes:

S401. The network device sends the second indication information to the terminal, where the second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs. Correspondingly, the second terminal receives the second indication information.

S402. The second terminal performs rate matching according to the second indication information and the at least two CSI-RSs.

In step S306, rate matching means that bits on the transmission channel are repeated or punctured (puncturing is to destroy the current bit, and the subsequent bits are sequentially advanced) One bit, to match the carrying capacity of the physical channel, and achieve the bit rate required by the transmission format when the channel is mapped. For example, after receiving the at least two CSI-RSs for time-frequency tracking, the terminal calculates the number of output bits on the transmission channel between the network side and the terminal side according to the pilot patterns of the CSI-RSs, if input The number of bits is less than the number of output bits, that is, using the repetition; if the number of input bits is more than the number of output bits, it is puncturing.

It should be noted that the rate matching technology mentioned in this embodiment is prior art, and therefore, the present disclosure does not limit the specific implementation of rate matching.

It should be noted that the foregoing step S202 and step S401 can be simultaneously sent. For example, a signaling may be sent, where the first indication information is carried in the signaling, and the second indication information is also carried, and may also be separately sent. The order of execution is not limited.

Embodiment 4:

FIG. 7 is a schematic flowchart diagram of another method for transmitting a reference signal provided by the present disclosure. In the third embodiment, when the network device needs to perform actual scheduling on the terminal, any CSI for time-frequency tracking may be used. - The RS is configured to be used as a pilot resource for beam management by the terminal or other terminal.

As shown in FIG. 7, the steps S201-S204 in the first embodiment are referred to, or the steps S301-S304 in the second embodiment are referenced. On the basis of the method, the method further includes:

S501. The network device sends third indication information to the terminal, where the third indication information is used to instruct the third terminal to perform beam management according to any one of the at least two CSI-RSs. Correspondingly, the third terminal receives the third indication information.

S502. The third terminal performs beam management according to the third indication information and any one of the at least two CSI-RSs.

Among them, beam management includes beam calibration and beam tracking.

In an example, performing beam management by using the CSI-RS may include: after receiving the at least two CSI-RSs for time-frequency tracking, the terminal may observe any CSI-RS corresponding to at least two CSI-RSs. Signal strength on the beam for beam calibration and/or beam tracking. It should be noted that the beam management technology mentioned in this embodiment is prior art, and therefore, the present disclosure does not limit the specific implementation of beam management.

It should be noted that the foregoing step S202 and step S501 may be sent. For example, a signaling may be sent, where the first indication information is carried in the signaling, and the third indication information is also carried, and may also be separately sent. The order of execution is not limited.

Embodiment 5:

FIG. 8 is a schematic flowchart diagram of another method for transmitting a reference signal according to the present disclosure. In the third embodiment, when the network device needs to perform actual scheduling on the terminal, any CSI for time-frequency tracking may be used. - The RS is configured as a pilot resource obtained by the terminal or other terminal as channel state information.

As shown in FIG. 8, the steps S201-S204 in the first embodiment are referred to, or the steps S301-S304 in the second embodiment are referenced. On the basis of the method, the method further includes:

S601. The network device sends fourth indication information to the terminal, where the fourth indication information is used to indicate that the fourth terminal acquires channel state information according to any one of the at least two CSI-RSs. Correspondingly, the fourth terminal of the opposite end receives the fourth indication information.

S602. The fourth terminal acquires channel state information according to the fourth indication information and any CSI-RS of the at least two CSI-RSs.

The channel state information is information that can reflect the channel state, such as a Precoding Matrix Indicator (PMI), a Rank Indication (RI), a Channel Quality Indicator (CQI), and the like. The CQI is used to indicate the channel quality of the Physical Downlink Shared Channel (PDSCH), the RI is used to indicate the effective data layer of the PDSCH, and the PMI is used to indicate the index of the codebook set.

In an example, acquiring the channel state information by using the CSI-RS may include: after receiving the at least two CSI-RSs for time-frequency tracking, the terminal may observe any CSI-RS of the at least two CSI-RSs. Corresponding to the signal strength on the beam to obtain channel state information.

It should be noted that the foregoing step S202 and step S601 may be sent. For example, a signaling may be sent, where the first indication information is carried in the signaling, and the fourth indication information is also carried, and may also be separately sent. The order of execution is not limited.

It should be noted that the channel state information acquisition technology mentioned in this embodiment is a prior art. Therefore, the specific implementation of the channel state information acquisition is not limited in the present disclosure.

It should be noted that after the implementation of the foregoing Embodiment 1 or Embodiment 2, Embodiment 1 or Embodiment 2 may be combined with any subsequent Embodiment 3 to Embodiment 5, that is, using CSI for time-frequency tracking. The RS can also implement at least one of the applications such as rate matching, beam management, and channel state information acquisition, which are not limited herein. It should be noted that although the present disclosure provides only three uses, functions that can be implemented by the CSI-RS for time-frequency tracking provided by the present disclosure are all within the scope of the present disclosure.

It should be noted that the first terminal, the second terminal, the third terminal, and the fourth terminal in the disclosure may be the same terminal or different terminals, which is not limited in this disclosure. It should be noted that the first terminal in the first embodiment and the second embodiment may also be replaced with other terminals, which is not limited herein.

The present disclosure does not limit the sequence of the above steps performed by the network device and the terminal. The order of execution of the above steps should be determined by its function and internal logic, that is, the size of the sequence of the above steps should not be implemented in the embodiment of the present disclosure. Form any limit.

The solution provided by the embodiment of the present disclosure is mainly introduced from the perspective of interaction between the network device and the terminal. It can be understood that, in order to implement the above functions, each of the foregoing network devices or terminals includes a hardware structure and/or a software module corresponding to each function. Those skilled in the art will readily appreciate that the present disclosure can be implemented in a combination of hardware or hardware and computer software in combination with the algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present disclosure.

The embodiment of the present disclosure may divide the function module into the network device and the terminal according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the modules in the embodiments of the present disclosure is schematic, and only one logical function is divided, and the actual implementation may have another division manner.

FIG. 9 is a schematic diagram of a possible configuration of a network device provided by the present disclosure. As shown in FIG. 9, the network device may include: determining unit 701, sending Unit 702, wherein:

The determining unit 701 is configured to support the network device to execute S201 and S301 shown in FIG. 2 .

The sending unit 702 is configured to support the network device to perform S202, S302 in FIG. 2, S401 in FIG. 6, S501 in FIG. 7, and step S601 in FIG.

As shown in FIG. 9, the network device further includes a selecting unit 703 for supporting the network device to implement the selection process of selecting the required pilot signal according to a predetermined rule as described above.

It should be noted that all the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

Under the integrated unit, the embodiment of the present disclosure further provides a network device, such as a base station, and FIG. 10 shows a schematic diagram of a simplified base station structure. The base station includes a 801 part and an 802 part. The 801 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; the 802 part is mainly used for baseband processing and control of base stations. Section 801 can be generally referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver. The 802 portion is typically the control center of the base station and may generally be referred to as a processing unit for controlling the base station to perform the steps performed above with respect to the network device. For details, please refer to the description of the relevant part above.

The transceiver unit of the 801 part, which may also be called a transceiver, or a transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing. Alternatively, the device for implementing the receiving function in the 801 part may be regarded as a receiving unit, and the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the 801 portion includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.

The 802 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and for base stations control. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device. The memory and the processor may be integrated or independently. In some embodiments, the 801 portion and the 802 portion may be integrated or may be independently arranged. In addition, all the functions in the 802 part may be implemented in one chip, or may be partially integrated in one chip to realize another part of the function integration in another one or more chips, which is not limited in the disclosure.

For example, in one implementation, corresponding to the method for transmitting a reference signal provided above, the processing unit is configured to perform the steps performed by the network device in S201, S203 shown in FIG. 2, and/or other in the present disclosure. step. The transceiver unit is configured to perform the steps performed by the network device in S202, S204 in FIG. 2, and/or other steps in the disclosure.

Further, the transceiver unit is configured to perform the steps performed by the network device in S401 in FIG. 6, and/or other steps in the disclosure.

Further, the transceiver unit is configured to perform the steps performed by the network device in S501 in FIG. 7, and/or other steps in the disclosure.

Further, the transceiver unit is configured to perform the steps performed by the network device in S601 in FIG. 8, and/or other steps in the disclosure.

For example, in one implementation, corresponding to the method for transmitting a reference signal provided above, the processing unit is configured to perform the steps performed by the network device in S301 of FIG. 5, and/or other steps in the disclosure. . The transceiver unit is configured to perform the steps performed by the network device in S302 of FIG. 5, and/or other steps in the disclosure.

FIG. 11 is a schematic diagram of a possible structure of a terminal provided by the present disclosure. As shown in FIG. 11 , the terminal may include: a receiving unit 901 and a determining unit 902. ,among them:

The receiving unit 901 is configured to support the terminal to receive the indication information, the reference signal, and the data sent by the network side, and to support the terminal to execute S304 in FIG. 5.

The determining unit 902 is configured to support the terminal to execute S204 in FIG. 2, and S303 in FIG. 5.

Further, the terminal further includes: a time-frequency tracking unit 903, a rate matching unit 904, a beam management unit 905, and a channel detecting unit 906, where:

The time-frequency tracking unit 903 is configured to support the terminal to execute S305 shown in FIG. 5.

The rate matching unit 904 is configured to support the terminal to execute S402 shown in FIG. 6.

The beam management unit 905 is configured to support the terminal to execute S502 shown in FIG. 7.

The channel detecting unit 906 is configured to support the terminal to execute S602 shown in FIG. 8.

The embodiment of the present disclosure further provides a terminal under the adopted integrated unit. Figure 12 shows a simplified schematic diagram of the terminal structure. It is convenient for understanding and illustration. In Fig. 12, the terminal uses a mobile phone as an example. As shown in FIG. 12, the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used for processing communication protocols and communication data, and controlling terminals, executing software programs, processing data of software programs, and the like. Memory is primarily used to store software programs and data. The RF circuit is mainly used for the conversion of the baseband signal and the RF signal and the processing of the RF signal. The antenna is mainly used to transmit and receive RF signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user. It should be noted that some types of terminals may not have input and output devices. The memory and the processor may be integrated or independently.

When the data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. In an actual end product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be independent of the processor settings, or may be integrated with the processor, and the embodiment of the present disclosure does not limit this.

In the embodiment of the present disclosure, the antenna and the radio frequency circuit having the transceiving function can be regarded as the transceiving unit of the terminal, and the processor having the processing function is regarded as the processing unit of the terminal. As shown in FIG. 12, the terminal includes a transceiver unit 1001 and a processing unit 1002. The transceiver unit may also be referred to as a transceiver (including a transmitter and/or receiver), a transceiver, a transceiver, and the like. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 1001 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 1001 is regarded as a sending unit, that is, the transceiver unit 1001 includes a receiving unit and a sending unit. The transceiver unit may also be referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit or the like. The transmitting unit may also be referred to as a transmitter, a transmitter, or a transmitting circuit, and the like. In some embodiments, the transceiver unit 1001 and the processing unit 1002 may be integrated or independently. In addition, all the functions in the processing unit 1002 may be implemented in one chip, or may be partially integrated into one chip to implement another part of the function integration in another one or more chips, which is not limited in the disclosure.

For example, in one implementation, based on the method for transmitting a reference signal provided above, the transceiving unit 1001 is configured to perform the steps of the terminal performing information transceiving, and/or other steps in the present disclosure. Processing unit 1002 is operative to perform S204, S205, and/or other steps in the present disclosure in FIG.

Further, the processing unit 1002 is configured to perform S402 in FIG. 6, and/or other steps in the present disclosure.

Further, the processing unit 1002 is configured to perform S502 in FIG. 7, and/or other steps in the present disclosure.

Further, the processing unit 1002 is configured to perform S602 in FIG. 8, and/or other steps in the present disclosure.

For example, in one implementation, based on the method for transmitting a reference signal provided above, the transceiving unit 1001 is configured to support the terminal to perform S304 in FIG. 5, and/or other steps in the present disclosure. Processing unit 1002 is for performing S303 in FIG. 5, and/or other steps in the present disclosure.

For the explanation and beneficial effects of the related content in any of the above-mentioned communication devices, reference may be made to the corresponding method embodiments provided above, and details are not described herein again.

The processor mentioned above may be a processor or a general term for multiple processing elements. For example, the processor is a central processing unit (CPU), may be an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present disclosure. For example: one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs). The processor can perform various functions of the network function node by running or executing a software program stored in the memory and calling data stored in the memory.

The above memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or a device that can store information and instructions. Other types of dynamic storage devices may also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage. Optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of Any other medium accessed by a computer, but is not limited thereto. The memory can exist independently or be connected to the processor via a communication bus. The memory can also be integrated with the processor. The memory is used to store a software program that executes the solution provided by the embodiment of the present disclosure, and is controlled by a processor.

Those skilled in the art will appreciate that embodiments of the present disclosure can be provided as a method, system, or computer program product. Thus, embodiments of the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Moreover, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

Embodiments of the present disclosure are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It will be apparent to those skilled in the art that various modifications and changes can be made in the embodiments of the present disclosure without departing from the spirit and scope of the disclosure. Thus, the present disclosure is intended to cover such modifications and variations as the modifications and variations of the embodiments of the present disclosure.

Claims

A method for transmitting a reference signal, comprising:

Determining first indication information, where the first indication information is used to indicate, to the first terminal, time-frequency resources of at least two channel state information reference signals CSI-RS, where the at least two CSI-RSs are used for time-frequency tracking;

Sending the first indication information to the first terminal.
The method of claim 1 wherein

The first indication information is used to indicate to the first terminal, a time-frequency resource of at least two CSI-RSs in the first CSI-RS resource set;

Or the first indication information is used to indicate, to the first terminal, a time-frequency resource of a CSI-RS of at least one CSI-RS group in the second CSI-RS resource set; where, each CSI-RS group is used by For time-frequency tracking, each CSI-RS group includes at least two CSI-RSs.
The method of claim 1 wherein the method further comprises:

Select at least two CSI-RSs.
The method of any of claims 1-3, wherein the method further comprises:

Transmitting, to the second terminal, second indication information, where the second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs;

and / or,

Sending third indication information to the third terminal, where the third indication information is used to indicate that the third terminal performs beam management according to any one of the at least two CSI-RSs;

and / or,

The fourth indication information is sent to the fourth terminal, where the fourth indication information is used to indicate that the fourth terminal acquires channel state information according to any one of the at least two CSI-RSs.
The method according to any one of claims 1-3, wherein the first indication information comprises resource configuration information of a CSI-RS corresponding to the at least two CSI-RSs.
The method according to any one of claims 1-3, wherein the first indication information comprises: pattern information of the occupied REs of the at least two CSI-RSs.
The method according to claim 2, wherein the first indication information is used to indicate to the first terminal, an identifier of at least two CSI-RSs in a first CSI-RS resource set, where the CSI-RS Identifying a time-frequency resource used to indicate the CSI-RS;

Or the first indication information is used to indicate, to the first terminal, a group number of at least one CSI-RS group in the second CSI-RS resource set; where the group number of the CSI-RS group is used to indicate Time-frequency resources of the CSI-RS of the CSI-RS group.
A method for transmitting a reference signal, comprising:

Receiving first indication information, where the first indication information is used to indicate, to the first terminal, time-frequency resources of at least two channel state information reference signals CSI-RS, where the at least two CSI-RSs are used for time-frequency tracking;

Determining the at least two CSI-RSs according to the first indication information.
The method of claim 8 wherein the method further comprises:

Determining a first CSI-RS resource set, where the first indication information is used to indicate, to the first terminal, a time-frequency resource of at least two CSI-RSs in the first CSI-RS resource set;

or,

Determining a second CSI-RS resource set, where the first indication information is used to indicate, to the first terminal, a time frequency of a CSI-RS of the at least one CSI-RS group in the second CSI-RS resource set Resources; wherein each CSI-RS group is used for time-frequency tracking, and each CSI-RS group includes at least two CSI-RSs.
The method of claim 8 wherein the method further comprises:

Time-frequency tracking is performed on the data sent by the received network device according to the at least two CSI-RSs.
The method of any of claims 8-10, wherein the method further comprises:

And receiving the second indication information, where the second indication information is used to indicate that the first terminal performs rate matching according to the at least two CSI-RSs; according to the second indication information and the at least two CSI-RSs Rate matching

and / or,

And receiving the third indication information, where the third indication information is used to indicate that the first terminal performs beam management according to any one of the at least two CSI-RSs; according to the third indication information and the Performing beam management on any of the at least two CSI-RSs;

and / or,

Receiving fourth indication information, where the fourth indication information is used to indicate that the first terminal acquires channel state information according to any one of the at least two CSI-RSs; according to the fourth indication information and the Any of the at least two CSI-RSs acquires channel state information.
The method according to any one of claims 8 to 10, wherein the first indication information comprises: resource configuration information of a CSI-RS corresponding to the at least two CSI-RSs.
The method according to any one of claims 8 to 10, wherein the first indication information comprises: pattern information of the occupied REs of the at least two CSI-RSs.
The method according to claim 9, wherein the first indication information is used to indicate to the first terminal, an identifier of at least two CSI-RSs in a first CSI-RS resource set, where the CSI-RS Identifying a time-frequency resource used to indicate the CSI-RS;

Or the first indication information is used to indicate, to the first terminal, a group number of at least one CSI-RS group in the second CSI-RS resource set; where the group number of the CSI-RS group is used to indicate Time-frequency resources of the CSI-RS of the CSI-RS group.
A network device, including:

a determining unit, configured to determine first indication information, where the first indication information is used to indicate, to the first terminal, time-frequency resources of at least two channel state information reference signals CSI-RS, where the at least two CSI-RSs are used Time-frequency tracking

And a sending unit, configured to send the first indication information to the first terminal.
The network device according to claim 15, wherein

The first indication information is used to indicate to the first terminal, a time-frequency resource of at least two CSI-RSs in the first CSI-RS resource set;

Or the first indication information is used to indicate, to the first terminal, a time-frequency resource of a CSI-RS of at least one CSI-RS group in the second CSI-RS resource set; where, each CSI-RS group is used by For time-frequency tracking, each CSI-RS group includes at least two CSI-RSs.
The network device of claim 15, wherein the network device further comprises:

A selection unit for selecting at least two CSI-RSs.
A network device according to any one of claims 15-17, wherein

The sending unit is further configured to:

Sending the second indication information to the terminal, where the second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs;

and / or,

Sending the third indication information to the terminal, where the third indication information is used to indicate that the second terminal performs beam management according to any one of the at least two CSI-RSs;

and / or,

Transmitting the fourth indication information to the terminal, where the fourth indication information is used to indicate that the second terminal acquires channel state information according to any one of the at least two CSI-RSs.
The network device according to any one of claims 15-17, wherein the first indication information comprises resource configuration information of a CSI-RS corresponding to the at least two CSI-RSs.
The network device according to any one of claims 15-17, wherein the first indication information comprises: pattern information of the occupied REs of the at least two CSI-RSs.
The network device according to claim 16, wherein the first indication information is used to indicate, to the first terminal, an identifier of at least two CSI-RSs in a first CSI-RS resource set, the CSI-RS The identifier of the CSI-RS is used to indicate the time-frequency resource of the CSI-RS;

Or the first indication information is used to indicate, to the first terminal, a group number of at least one CSI-RS group in the second CSI-RS resource set; where the group number of the CSI-RS group is used to indicate Time-frequency resources of the CSI-RS of the CSI-RS group.
A first terminal includes:

a receiving unit, configured to receive first indication information, where the first indication information is used to indicate, to the first terminal, time-frequency resources of at least two channel state information reference signals CSI-RS, where the at least two CSI-RSs are used Time-frequency tracking

And a determining unit, configured to determine the at least two CSI-RSs according to the first indication information.
The first terminal of claim 22, wherein

The determining unit is further configured to determine a first CSI-RS resource set, where the first indication information is used to indicate, to the first terminal, at least two CSIs in the first CSI-RS resource set. a time-frequency resource of the RS; or, configured to determine a second CSI-RS resource set; wherein the first indication information is used to indicate, to the first terminal, at least one of the second CSI-RS resource set Time-frequency resources of CSI-RSs of the CSI-RS group; wherein each CSI-RS group is used for time-frequency tracking, and each CSI-RS group includes at least two CSI-RSs.
The first terminal of claim 22, wherein the first terminal further comprises:

The time-frequency tracking unit is configured to perform time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.
A first terminal according to any one of claims 22 to 24, wherein

The receiving unit is further configured to receive the second indication information, where the second indication information is used to indicate that the first terminal performs rate matching according to the at least two CSI-RSs;

The first terminal further includes: a rate matching unit, configured to perform rate matching according to the second indication information and the at least two CSI-RSs;

and / or,

The receiving unit is further configured to receive third indication information, where the third indication information is used to indicate that the first terminal performs beam management according to any one of the at least two CSI-RSs;

The first terminal further includes: a beam management unit, configured to perform beam management according to the third indication information and any one of the at least two CSI-RSs;

and / or,

The receiving unit is further configured to receive fourth indication information, where the fourth indication information is used to indicate that the first terminal acquires channel state information according to any one of the at least two CSI-RSs;

The first terminal further includes: a channel detecting unit, configured to acquire channel state information according to the fourth indication information and any one of the at least two CSI-RSs.
The first terminal according to any one of claims 22 to 24, wherein the first indication information comprises: resource configuration information of a CSI-RS corresponding to the at least two CSI-RSs.
The first terminal according to any one of claims 22 to 24, wherein the first indication information comprises: pattern information of the occupied REs of the at least two CSI-RSs.
The first terminal of claim 23, wherein

The first indication information is used to indicate, to the first terminal, an identifier of at least two CSI-RSs in the first CSI-RS resource set, where the identifier of the CSI-RS is used to indicate the time of the CSI-RS Frequency resource

Or the first indication information is used to indicate, to the first terminal, a group number of at least one CSI-RS group in the second CSI-RS resource set; where the group number of the CSI-RS group is used to indicate Time-frequency resources of the CSI-RS of the CSI-RS group.
A method for transmitting a reference signal, comprising:

Determining time-frequency resources of at least two CSI-RSs in the preset third CSI-RS resource set, or determining CSI-RSs in at least one of the pre-configured fourth CSI-RS resource sets Time-frequency resources; wherein each CSI-RS group includes at least two CSI-RSs;

And transmitting, by using the time-frequency resources of the at least two CSI-RSs, a CSI-RS to the first terminal; wherein the CSI-RS is used for time-frequency tracking.
The method of claim 29, wherein the determining the time-frequency resources of the at least two CSI-RSs in the preset third CSI-RS resource set comprises: determining the pre-configured third CSI according to the network parameter information - a time-frequency resource of at least two CSI-RSs in the RS resource set;

Determining the time-frequency resource of the CSI-RS in the at least one CSI-RS group in the pre-configured fourth CSI-RS resource set includes: determining, according to the network matching information, at least at least one of the pre-configured fourth CSI-RS resource sets Time-frequency resources of CSI-RS in a CSI-RS group;

The parameter information includes at least one of the following: a cell ID of a cell managed by the network device, and a mapping relationship between a cell and a time-frequency resource of the CSI-RS, and a cell of the cell managed by the network device. The area ID of the area and the mapping relationship between the area and the time-frequency resource of the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.
The method of claim 29 or 30, wherein the method further comprises:

Transmitting, to the second terminal, second indication information, where the second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs;

and / or,

Sending third indication information to the third terminal, where the third indication information is used to indicate that the third terminal performs beam management according to any one of the at least two CSI-RSs;

and / or,

The fourth indication information is sent to the fourth terminal, where the fourth indication information is used to indicate that the fourth terminal acquires channel state information according to any one of the at least two CSI-RSs.
A method for transmitting a reference signal, comprising:

Determining time-frequency resources of at least two CSI-RSs in the preset third CSI-RS resource set, or determining CSI-RSs in at least one of the pre-configured fourth CSI-RS resource sets a time-frequency resource; wherein each of the CSI-RS groups includes at least two CSI-RSs;

The CSI-RS is received using time-frequency resources of the at least two CSI-RSs; wherein the CSI-RS is used for time-frequency tracking.
The method of claim 32, wherein

Determining the time-frequency resource of the at least two CSI-RSs in the preset third CSI-RS resource set, including: determining, according to the network parameter information, at least two CSIs in the third CSI-RS resource set. RS time-frequency resources;

Determining the time-frequency resource of the CSI-RS in the at least one CSI-RS group in the pre-configured fourth CSI-RS resource set, including: determining, according to the network parameter information, at least the third CSI-RS resource set Time-frequency resources of two CSI-RSs;

The network parameter information includes at least one of the following information: a mapping relationship between the serving cell ID of the first terminal and a time-frequency resource of the CSI-RS, where the server cell of the terminal is located The mapping between the area ID and the time-frequency resource of the area and the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.
The method of claim 32, wherein the method further comprises:

Time-frequency tracking is performed on the data sent by the received network device according to the at least two CSI-RSs.
A method according to any of claims 32-34, wherein

And receiving the second indication information, where the second indication information is used to indicate that the first terminal performs rate matching according to the at least two CSI-RSs; according to the second indication information and the at least two CSI-RSs Rate matching

and / or,

And receiving the third indication information, where the third indication information is used to indicate that the first terminal performs beam management according to any one of the at least two CSI-RSs; according to the third indication information and the Performing beam management on any of the at least two CSI-RSs;

and / or,

Receiving fourth indication information, where the fourth indication information is used to indicate that the first terminal acquires channel state information according to any one of the at least two CSI-RSs; according to the fourth indication information and the Any of the at least two CSI-RSs acquires channel state information.
A network device, including:

a determining unit, configured to determine a time-frequency resource of at least two CSI-RSs in the preset third CSI-RS resource set, or used to determine at least one CSI in the pre-configured fourth CSI-RS resource set Time-frequency resources of CSI-RSs in the RS group; wherein each CSI-RS group includes at least two CSI-RSs;

And a sending unit, configured to send, by using a time-frequency resource of the at least two CSI-RSs, a CSI-RS to the first terminal, where the CSI-RS is used for time-frequency tracking.
The network device according to claim 36, wherein

The determining unit is configured to determine, according to the network parameter information, the pre-configured third CSI-RS resource set, when determining the time-frequency resource of the at least two CSI-RSs in the preset third CSI-RS resource set. Time-frequency resources of at least two CSI-RSs; or,

And determining, by the determining unit, the time-frequency resource of the CSI-RS in the at least one CSI-RS group in the fourth CSI-RS resource set that is configured in advance: determining, according to the network matching information, the pre-configured fourth CSI- a time-frequency resource of a CSI-RS in at least one CSI-RS group in the RS resource set;

The parameter information includes at least one of the following: a cell ID of a cell managed by the network device, and a mapping relationship between a cell and a time-frequency resource of the CSI-RS, and a cell of the cell managed by the network device. The area ID of the area and the mapping relationship between the area and the time-frequency resource of the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.
A network device according to claim 36 or 37, wherein

The sending unit is further configured to:

Transmitting, to the second terminal, second indication information, where the second indication information is used to indicate that the second terminal performs rate matching according to the at least two CSI-RSs;

and / or,

Sending third indication information to the third terminal, where the third indication information is used to indicate that the third terminal performs beam management according to any one of the at least two CSI-RSs;

and / or,

The fourth indication information is sent to the fourth terminal, where the fourth indication information is used to indicate that the fourth terminal acquires channel state information according to any one of the at least two CSI-RSs.
A first terminal includes:

a determining unit, configured to determine a time-frequency resource of at least two CSI-RSs in the preset third CSI-RS resource set, or determine at least one CSI-RS group in the pre-configured fourth CSI-RS resource set a time-frequency resource of a medium CSI-RS; wherein each of the CSI-RS groups includes at least two CSI-RSs;

And a receiving unit, configured to receive, by using a time-frequency resource of the at least two CSI-RSs, where the CSI-RS is used for time-frequency tracking.
A first terminal according to claim 39, wherein

And determining, by the determining unit, the time-frequency resources of the at least two CSI-RSs in the third CSI-RS resource set that are configured in advance: determining, according to the network parameter information, the third CSI-RS resource set Time-frequency resources of at least two CSI-RSs;

And determining, by the determining unit, the time-frequency resource of the CSI-RS in the at least one CSI-RS group in the fourth CSI-RS resource set that is configured in advance: determining, according to the network parameter information, the fourth CSI-RS Time-frequency resources of at least two CSI-RSs in the resource set;

The network parameter information includes at least one of the following: a serving cell ID of the terminal, and a mapping relationship between the cell and a time-frequency resource of the CSI-RS, where the server cell of the first terminal is located The mapping between the area ID and the time-frequency resource of the area and the CSI-RS, and the number of CSI-RS resources in the CSI-RS set configured by the CSI-RS resource set.
The first terminal of claim 39, wherein the terminal further comprises:

The time-frequency tracking unit is configured to perform time-frequency tracking on the data sent by the received network device according to the at least two CSI-RSs.
A first terminal according to any one of claims 39 to 41, wherein

The receiving unit is further configured to receive the second indication information, where the second indication information is used to indicate that the first terminal performs rate matching according to the at least two CSI-RSs;

The first terminal further includes: a rate matching unit, configured to perform rate matching according to the second indication information and the at least two CSI-RSs;

and / or,

The receiving unit is further configured to receive third indication information, where the third indication information is used to indicate that the first terminal performs beam management according to any one of the at least two CSI-RSs;

The first terminal further includes: a beam management unit, configured to perform beam management according to the third indication information and any one of the at least two CSI-RSs;

and / or,

The receiving unit is further configured to receive fourth indication information, where the fourth indication information is used to indicate that the first terminal acquires channel state information according to any one of the at least two CSI-RSs;

The first terminal further includes: a channel detecting unit, configured to acquire channel state information according to the fourth indication information and any one of the at least two CSI-RSs.
A network device comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor executing the computer program as claimed in claims 1 to 7, 29 The method of the method of transmitting a reference signal according to any of the preceding claims.
A first terminal comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor executing the computer program as claimed in claims 8 to 14, 32 The method of the method for transmitting a reference signal as described in any one of 35.
A computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program being executed by a processor to implement the method of any one of claims 1 to 7, 29 to 31 The steps of the method for transmitting a reference signal.
A computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program being executed by a processor to implement the method of any one of claims 8 to 14, 32 to 35 The steps of the method for transmitting a reference signal.