A reference signal transmission method and related devices

Abstract

A reference signal transmission method for power consumption saving. This method can be applied to time-frequency tracking. The method of the embodiment of the present application includes: a network device sending configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; the network device sending the RS according to a first period within a first target transmission period, and the first target transmission period belongs to at least one periodic target transmission periods. Thereby, the RS is only sent within some of the target transmission periods, that is, the RS is not an always-on signal, and the wake-up time of the UE is shorter, which is beneficial to power consumption saving of the UE.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a reference signal transmission method and related devices. Background Art

[0002] In a Long Term Evolution (LTE) system, a base station can periodically transmit a cell specific reference signal (CRS), also known as a common reference signal (CRS). A user equipment (UE) maintains synchronization with the base station in terms of time and frequency by tracking the CRS. Among them, the state of the UE can include a connected state and a non-connected state, and the non-connected state can include an idle state and an inactive state.

[0003] In a 5th generation mobile networks (5G) New Radio (NR) system, there is no CRS, and a Channel State Information reference signal for tracking (TRS) and a synchronization signal block (SSB) are introduced. The UE receives the TRS in the connected state and the SSB in the non-connected state.

[0004] The 3rd Generation Partnership Project (3GPP) protocol stipulates that for a UE in the non-connected state, it can only be assumed that the transmission period of the SSB is 20 ms, corresponding to a relatively long wake-up time of the UE, resulting in a relatively large power consumption overhead of the UE. Summary of the Invention

[0005] Embodiments of the present application provide a reference signal transmission method and related devices, which can save power consumption.

[0006] In a first aspect of an embodiment of the present application, a reference signal transmission method is provided. The method includes: a network device sends configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; the network device sends the RS according to a first period within a first target transmission period, and the first target transmission period belongs to at least one periodic target transmission period.

[0007] In the embodiments of the present application, the network device sends the configuration information of the reference signal RS to the terminal device. By configuring the target transmission period and transmitting the RS according to the first period within the first target transmission period, the target transmission period includes the first target transmission period. Thus, the RS is only transmitted in a part of the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is short, which is beneficial to the UE to save power consumption.

[0008] Optionally, in a possible implementation manner of the first aspect, the above steps further include: the network device determines the first paging occasion PO; the network device transmits the RS according to the first period within the first target transmission period, including: the network device transmits the RS according to the first period within at least one time slot within the first target transmission period, and the at least one time slot is the time slot included in the first PO, or the at least one time slot is the time slot included in the first PO and one or more time slots before the time slot included in the first PO.

[0009] In this possible implementation manner, the network device transmits the RS in the time slot included in the first PO, or the time slot included in the first PO and one or more time slots before the time slot included in the first PO, which is beneficial to improving the efficiency of the terminal device receiving the RS.

[0010] Optionally, in a possible implementation manner of the first aspect, the above steps further include: the network device determines the second PO, and the second PO is within the first duration at the beginning of the first target transmission period; the network device sends the first indication information to the terminal device within the second PO, and the first indication information is used to indicate that the network device transmits the RS within the first target transmission period.

[0011] In this possible implementation manner, the network device indicates the terminal device to receive the RS in the target time period where the second PO is located by sending the first indication information, thereby improving the reception efficiency.

[0012] Optionally, in a possible implementation manner of the first aspect, the above steps further include: determining the third PO, and the third PO is within the second duration before the first target transmission period; sending the second indication information to the terminal device within the third PO, and the second indication information is used to indicate that the network device transmits the RS within the first target transmission period.

[0013] In this possible implementation manner, the network device indicates the terminal device to receive the RS in the target time period after the third PO by sending the second indication information, thereby improving the reception efficiency.

[0014] Optionally, in a possible implementation of the first aspect, the above step: the configuration information is further used to indicate a first time point and a second time point within a first target transmission period; the network device transmits the RS according to a first period within the first target transmission period, including: the network device transmits the RS according to the first period between the first time point and the second time point.

[0015] In this possible implementation, by further limiting that the network device transmits the RS according to the first period between the first time point and the second time point and informing the terminal device through the configuration information, the reception efficiency is improved.

[0016] Optionally, in a possible implementation of the first aspect, the above step: the RS is CSI-RS or TRS.

[0017] In this possible implementation, the RS is specifically defined, which improves the feasibility of the solution.

[0018] A second aspect of the embodiments of the present application provides a reference signal transmission method, which includes: a terminal device receives configuration information of a reference signal RS from a network device, and the configuration information is used to indicate at least one periodic target transmission period of the RS; the terminal device determines whether the network device transmits the RS within the target transmission period; if so, receives the RS.

[0019] In the embodiments of the present application, the terminal device receives the configuration information of the reference signal RS, and the terminal device determines whether the network device transmits the RS within the target transmission period; if so, receives the RS. Thus, the RS is received only in a part of the time period within the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is short, which is beneficial to the UE to save power.

[0020] Optionally, in a possible implementation of the second aspect, the above step further includes: the terminal device determines a first paging occasion PO; receiving the RS includes: attempting to receive the RS on at least one time slot within the target transmission period, where the at least one time slot is the time slot included in the first PO, or the at least one time slot is the time slot included in the first PO and one or more time slots before the time slot included in the first PO.

[0021] In this possible implementation, the terminal device only attempts to receive the RS on the time slot of the first PO and one or more time slots before the time slot included in the first PO, which improves the reception efficiency compared with attempting to receive throughout the cycle.

[0022] Optionally, in a possible implementation of the second aspect, in the above steps: The terminal device determines whether the network device sends the RS within the target transmission period, including: The terminal device receives a target signal according to the configuration information of the reference signal RS sent by the network device; The terminal device calculates the received signal quality of the target signal; The terminal device determines whether the received signal quality of the target signal meets a preset condition; It further includes: If the received signal quality meets the preset condition, it is determined that the network device sends the RS within the target transmission period; If the received signal quality does not meet the preset condition, it is determined that the network device does not send the RS within the target transmission period.

[0023] In this possible implementation, it is specified that the terminal device receives the RS through blind detection, improving the feasibility of the solution.

[0024] Optionally, in a possible implementation of the second aspect, the above steps further include: The terminal device determines a second PO, and the second PO is within the first duration at the beginning of the first target transmission period; The terminal device determines whether the second PO contains a first indication information, and the first indication information is used to indicate that the network device sends the RS within the first target transmission period, and the first target transmission period belongs to the target transmission period; The terminal device receives the RS according to the first indication information.

[0025] In this possible implementation, the terminal device can determine whether to send according to the first indication information in its own second PO, and receive the RS according to the indication information, improving the accuracy of the terminal device receiving the RS.

[0026] Optionally, in a possible implementation of the second aspect, the above steps further include: The terminal device determines a third PO, and the third PO is within the second duration before the first target transmission period; The terminal device determines whether the third PO contains a second indication information, and the second indication information is used to indicate that the network device sends the RS within the first target transmission period, and the first target transmission period belongs to the target transmission period; The terminal device receives the RS according to the second indication information.

[0027] In this possible implementation, the terminal device can determine whether to send according to the second indication information in its own third PO, and receive the RS according to the indication information, improving the accuracy of the terminal device receiving the RS.

[0028] Optionally, in a possible implementation of the second aspect, in the above steps: The configuration information is further used to indicate a first time point and a second time point within the target transmission period; The terminal device attempts to receive the RS within the time period between the first time point and the second time point.

[0029] In this possible implementation, the terminal device determines that the network device attempts to receive the RS according to the first period between the first time point and the second time point through the configuration information, improving the reception efficiency.

[0030] Optionally, in a possible implementation of the second aspect, the above steps further include: the terminal device performs time-frequency tracking based on the RS.

[0031] In this possible implementation, the terminal device does not need to receive the SSB before the PO for time-frequency tracking. And when the RS is the TRS, the transmission bandwidth, time, and frequency-domain density of the TRS are greater than those of the SSB, having better transmission resource performance.

[0032] Optionally, in a possible implementation of the second aspect, in the above steps: the RS is the CSI-RS or the TRS.

[0033] In this possible implementation, the RS is specifically defined, improving the feasibility of the solution.

[0034] The third aspect of this application provides a network device for performing the method in the first aspect or any possible implementation of the first aspect. Specifically, the device includes a module or unit for performing the method in the first aspect or any possible implementation of the first aspect.

[0035] The fourth aspect of this application provides a terminal device for performing the method in the second aspect or any possible implementation of the second aspect. Specifically, the device includes a module or unit for performing the method in the second aspect or any possible implementation of the second aspect.

[0036] The fifth aspect of this application provides a network device, which includes at least one processor and at least one communication interface. At least one communication interface is used to provide input / output of data and / or information for at least one processor; at least one processor is used to process data and / or information so that the network device implements the method in the first aspect or any possible implementation of the first aspect.

[0037] The sixth aspect of this application provides a terminal device, which includes at least one processor and at least one communication interface. At least one communication interface is used to provide input / output of data and / or information for at least one processor; at least one processor is used to process data and / or information so that the terminal device implements the method in the second aspect or any possible implementation of the second aspect.

[0038] The seventh aspect of the present application provides a computer storage medium storing instructions, which, when executed on a computer, cause the computer to execute the methods in the foregoing first aspect or any possible implementation manner of the first aspect, the second aspect or any possible implementation manner of the second aspect.

[0039] The eighth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to execute the methods in the foregoing first aspect or any possible implementation manner of the first aspect, the second aspect or any possible implementation manner of the second aspect.

[0040] Among them, for the technical effects brought by the third, fifth, seventh, and eighth aspects or any possible implementation manner thereof, reference may be made to the technical effects brought by the first aspect or different possible implementation manners of the first aspect, which will not be elaborated herein.

[0041] Among them, for the technical effects brought by the fourth, sixth, eighth, and eighth aspects or any possible implementation manner thereof, reference may be made to the technical effects brought by the second aspect or different possible implementation manners of the second aspect, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of a communication system in an embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the discontinuous reception period of the UE in an embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the search space set period in an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the CSI-RS resource in an embodiment of the present application;

[0046] Figure 5 It is a schematic flow diagram of a reference signal reception method in an embodiment of the present application;

[0047] Figure 6 It is a schematic diagram of a time slot for transmitting RS in an embodiment of the present application;

[0048] Figure 7 It is another schematic diagram of a time slot for transmitting RS in an embodiment of the present application;

[0049] Figure 8 It is a schematic diagram of the first PO and the RS transmission period in an embodiment of the present application;

[0050] Figure 9 It is a schematic diagram of the second PO and the RS transmission period in an embodiment of the present application;

[0051] Figure 10 It is a schematic diagram of the sending periods of the third PO and RS in the embodiments of the present application;

[0052] Figure 11 It is a schematic structural diagram of a network device in the embodiments of the present application;

[0053] Figure 12 It is another schematic structural diagram of a network device in the embodiments of the present application;

[0054] Figure 13 It is a schematic structural diagram of a terminal device in the embodiments of the present application;

[0055] Figure 14 It is another schematic structural diagram of a network device in the embodiments of the present application;

[0056] Figure 15 It is another schematic structural diagram of a terminal device in the embodiments of the present application. Detailed implementation manners

[0057] The embodiments of the present application provide a reference signal transmission method and related devices, which are applied to the scenario where the network device needs to communicate with the terminal device when the terminal device is in the idle state (RRC_IDLE) or the inactive state (RRC_INACTIVE).

[0058] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0059] Terms such as "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order different from that shown or described here. "Multiple" means two or more. In view of this, in the embodiments of the present application, "multiple" can also be understood as "at least two". In addition, the terms "include" and "have" and any of their deformations are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0060] Figure 1 A schematic diagram of a communication system is given. The communication system may include a network device 101 and terminal devices 102 to 104 connected to the network device 101.

[0061] In the embodiments of the present application, only one network device 101 and three terminal devices 102 to 104 are taken as examples for illustrative purposes. In practical applications, the communication system in the embodiments of the present application may have more network devices 101 and terminal devices 102, and the terminal devices 102 may also be one or more. The embodiments of the present application do not limit the numbers of the network device 101 and the terminal devices 102.

[0062] The network device 101 in the embodiments of the present application may be any device with wireless transceiver functions. Including but not limited to: base stations (such as base stations in the fifth-generation communication system, base stations in future communication systems, etc.), radio remote units (RRUs), wireless relay nodes, wireless backhaul nodes, transmission reference points (TRPs), wireless controllers in the cloud radio access network (CRAN) scenario, etc. Specifically, it is not limited here.

[0063] The terminal device in the embodiments of this application can be a device that provides voice and / or data connectivity to users, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. The terminal device can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal. For example, it can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges language and / or data with network devices. For example, devices such as personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). The terminal device can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device, or user equipment. Additionally, the terminal device can also be a chip system for implementing UE functions. In the embodiments of this application, the terminal device is taken as an example of a user terminal UE for illustration only.

[0064] The 3GPP (third generation partnership project) standards organization is formulating protocol standards for the fifth generation of cellular mobile communication systems. Compared with the LTE (long term evolution) system, the NR system supports a larger transmission bandwidth, more transceiver antenna arrays, higher transmission rates, and a more flexible and finer-grained scheduling mechanism. The above characteristics of the NR system provide a wider range of applications, but at the same time greatly increase the power consumption burden of the UE.

[0065] To reduce the power consumption of the UE, 3GPP introduced a power saving research topic in the NR rel-16 (new radio release 16) version, aiming to study possible power reduction solutions for the UE in various states (including the connected state, idle state, and inactive state, etc.). Among them, how to save the power consumption of the UE in the connected state is a research focus.

[0066] 3GPP designed the discontinuous reception (DRX) mechanism to reduce the UE power consumption in the connected state. Its main features are as Figure 2 shown in the DRX cycle schematic diagram:

[0067] The basic time unit in the DRX state is a DRX cycle, and the duration of a DRX cycle is called a DRX period 200. A DRX cycle can also be called a DRX period 200, including a sleep time 201 (sleep, also known as discontinuous reception off, DRX_OFF) and a wake-up time 202 (on duration, also known as discontinuous reception on, DRX_ON, and can also be called active time, activation time).

[0068] When the DRX period 200 is in the sleep time 201, the UE in the sleep mode can completely turn off the communication devices (such as radio frequency transceiver, baseband processor, etc.) to reduce power consumption. When the DRX period 200 is in the wake-up time 202, the UE in the wake-up mode listens to the physical downlink control channel (PDCCH), and starts an inactive timer. Once the downlink control information (DCI) is received in the downlink control channel, the UE will restart the inactive timer to calculate the timing. If the inactive timer times out, the UE returns to the sleep mode again.

[0069] In general, the UE does not wake up at the beginning of the wake-up time 202, but will wake up in a period of time before the wake-up time 202, such as several time slots. A time slot can include 12 or 14 symbols. After the UE wakes up in advance, it will receive the downlink reference signal and perform operations such as time-frequency offset synchronization to prevent the UE's clock and operating frequency from deviating from the base station's clock and frequency domain due to the UE being in the sleep mode for a long time. At the same time, the UE can also try to update the system message first.

[0070] The network device can send a paging message to the UE. The paging message can be used to notify the UE to receive a paging request, system information update, or notify the UE to receive an earthquake and tsunami warning system or commercial mobile alert service. For energy-saving considerations, the paging reception of the UE follows the DRX principle.

[0071] The transmission opportunity in the paging message is sent in a pre-defined search space set, and the search space set has a pre-configured bandwidth and transmission period in time-frequency resources. The search space set is configured in a control resource set (CORESET), and the frequency resources occupied by the search space set are defined in the control resource set. In the time domain, the transmission period of the search space set can be from 1 time slot to 2560 time slots. In each period, one or several consecutive time slots can be used to send wake-up signals. For details, please refer to Figure 3 :

[0072] In this embodiment of the application, a search space set period 300 is taken as an example for illustration. The search space set period 300 includes time slots 301 to 304, and the number of time slots included in a search space set period 300 is not limited.

[0073] In each time slot for sending the paging message, the network device can also configure the specific position for sending the paging message in each time slot for sending the paging message. The transmission moment of the paging message can be represented by 1 to 3 symbols in a time slot, such as 3051 to 3053. These symbols can be referred to as a monitoring occasion 305 to 306. The UE determines, according to the time slot position of the paging message in each period in the configured search space set period 300, according to Figure 3 The paging message appears in time slots 302 and 303, the appearance positions of the paging opportunities 305 to 306 in each time slot, and the number of symbols included in the paging opportunity, according to Figure 3 Both the paging opportunity 305 and the paging opportunity 306 include 3 symbols, and determine the paging opportunity in one period.

[0074] There are three states for the UE, namely the connected state, the idle state, and the inactive state. In the connected state or the inactive state, the UE generally turns off the receiver and is in a low-power state. The UE wakes up from the low-power mode every once in a while and tries to receive paging. The process of receiving paging can be as follows: The network device broadcasts system parameters to all UEs; each UE, based on the system parameters, obtains the paging frame (PF) and paging occasion (PO) occupied by the corresponding paging message on the physical downlink shared channel (PDSCH); the UE starts from the PO subframe of the PF and listens for whether there is a paging radio network temporary identifier (P-RNTI) on the physical downlink control channel (PDCCH). If there is, the UE obtains the information of the time-frequency resources occupied by the paging message from the PDCCH; finally, the UE receives the paging message on the time-frequency resources of the PDSCH. It should be understood that the network device does not send paging messages to the UE on every PO. The UE will detect paging DCI in the PO to determine whether the network device sends paging. UEs in the idle state and the inactive state will only try to receive paging in the PF.

[0075] Before the UE in the idle state and the inactive state wakes up and tries to receive paging, to ensure the receiving performance, the UE can adjust some parameters of the receiver. For example, time-frequency tracking, also known as time-frequency synchronization. Its main purpose is that due to cost limitations in manufacturing, the crystal oscillator accuracy of the frequency used by the UE is not particularly high. This will cause a deviation between the time and working frequency maintained by the UE itself and the clock and frequency of the network after the UE has been powered on and running for a period of time. Therefore, the base station needs to send specific reference signals for the UE to estimate the current timing deviation, frequency-domain deviation, delay spread, and Doppler spread between itself and the base station, and compensate for its own time-frequency offset. In the idle state and the inactive state, the UE generally performs preliminary time-frequency tracking by receiving the SSB. In the connected state, the UE can perform fine time-frequency tracking by further receiving the time-frequency tracking reference signal (TRS).

[0076] 3GPP defines TRS for the UE to perform fine time-frequency offset estimation. The TRS of NR is a specialized channel state information-reference signal (CSI-RS), which is configured through a non-zero power channel state information reference signal resource set (NZP CSI-RS resource set). Each CSI-RS resource set includes two or four CSI-RS resources. Each CSI-RS resource represents the resource elements (REs) transmitted on a symbol with a certain frequency domain density and bandwidth. The symbol positions of each CSI-RS resource are different, but their transmission bandwidths, densities, and frequency domain positions are the same, as Figure 4 shown.

[0077] Since the TRS is configured for the connected UE through the UE-specific radio resource control (RRC) signaling, there is no dedicated RRC signaling for the non-connected UE, and it can only perform time-frequency synchronization through the SSB. The non-connected UE can only assume that the transmission period of the SSB is 20 ms. The wake-up time of the corresponding UE may be one SSB period or two SSB periods, resulting in a relatively large power consumption overhead for the UE. The signal resources that the UE can receive in the non-connected state are limited. Since there is no dedicated configuration signaling for the non-connected UE, it has been proposed to configure the reference signal (RS) to all UEs through the system message. However, if this RS is the same as the CRS in LTE, it becomes a cell-specific signal that is always transmitted, which will occupy a large amount of time-frequency resources, and it is necessary to consider avoiding this RS signaling in the subsequent evolution of NR, thus affecting the forward compatibility.

[0078] The embodiment of the present application provides a reference signal transmission method, which can, on the one hand, increase the density of the signal resources received by the UE in the non-connected state, and on the other hand, does not make this RS become a cell-specific signal, facilitating the subsequent evolution of NR.

[0079] The following describes the reference signal transmission method in the embodiment of the present application with reference to the Figures 1 to 4 schematic diagram:

[0080] Please refer to Figure 5 , an embodiment of the reference signal transmission method in the embodiment of the present application includes:

[0081] 501. The network device sends the configuration information of the reference signal RS to the terminal device.

[0082] The network device sends the configuration information of one or more RSs to the terminal device. In the embodiments of the present application, there are various ways to send the configuration information of RSs, which are described separately below:

[0083] 1. Before the UE and the network device establish a connection, the network device sends the configuration information of RSs in the form of broadcast or system message.

[0084] 2. Before the UE and the network device establish a connection, the network device sends the configuration information of RSs to the terminal device through the previously established connection.

[0085] In the embodiments of the present application, the RS can be CSI-RS, or can also be TRS, etc., which is not specifically limited here.

[0086] The configuration information in the embodiments of the present application includes the parameters of the target transmission period. The access network side configures the target transmission period, which can also be called a monitoring occasion, and the target transmission period is configured in a periodic manner.

[0087] Optionally, the configuration information further includes: the frequency bandwidth occupied by the RS, the frequency pattern, the transmission period of the RS in the time domain (i.e., t in Figure 6 ), the transmission time slots in each period t, and the symbols in each time slot, etc.

[0088] If the configuration information does not include the parameters such as the frequency bandwidth occupied by the RS, the frequency pattern, the transmission period of the RS in the time domain (i.e., t in Figure 6 ), the transmission time slots in each period t, and the symbols in each time slot, etc., the configuration information can be sent before or after.

[0089] 502. The network device sends RSs to the terminal device according to the first period within the first target transmission period.

[0090] In the embodiments of the present application, the target transmission period for sending RSs is called the first target transmission period, and the target transmission period for not sending RSs is called the second target transmission period, that is, the RS is not an always-on signal.

[0091] The network device sends RSs to the terminal device according to the first period within the first target transmission period. As shown in Figure 6 or Figure 7 , a solid vertical bar represents a time slot for sending RSs. The network device does not send RSs within the second target transmission period. As shown in Figure 6 or Figure 7 , where the dashed vertical bar represents not sending.

[0092] In the embodiments of the present application, the first target transmission period includes multiple first periods. As shown in Figure 6 , the first target transmission period includes 4 first periods t, as shown inFigure 7 As shown, the first target transmission period includes 8 first cycles t, and the number of first cycles included in the first target transmission period and the number of time slots included in the first cycle t are not limited herein.

[0093] In the embodiments of the present application, the time period of the target transmission period is greater than or equal to the time period of the first cycle, and is not specifically limited herein. If the time period of the target transmission period is greater than the time period of the first cycle, it is beneficial to the energy saving of the UE.

[0094] In the embodiments of the present application, there are multiple ways for the network device to send RS, which are described separately below:

[0095] 1. The network device sends RS in multiple time slots from the start to the end of the first PO according to the first cycle.

[0096] In the embodiments of the present application, RS is only sent in multiple time slots from the start to the end of the PO, reducing the overhead of RS on the air interface resources.

[0097] 2. The network device sends RS in the first time slot, in N time slots before the first time slot corresponding to the first PO, and in multiple time slots from the start to the end of the first PO according to the first cycle, where N is an integer greater than or equal to 1. As Figure 8 shown, there are two monitoring opportunities corresponding to POs in the first target transmission period, and there are 6 time slots corresponding to each PO. N is 3 (that is, the network device sends RS in the third time slot before the first PO and in the 6 time slots of the first PO). Among them, the number of POs, the number of N, and the number of time slots corresponding to the PO are not limited herein.

[0098] In the embodiments of the present application, RS only appears near the first PO in a target transmission period, reducing the overhead of RS on the air interface resources.

[0099] Furthermore, the network device may configure a first time point (T_start) and a second time point (T_stop) in the first target transmission period, and only send RS between T_start and T_stop ( Figure 6 and Figure 7 as shown). If the network device configures T_start and T_stop, the configuration information in step 502 further includes the relevant parameters of T_start and T_stop (the relevant parameters include the detection time TD). Among them: A configuration method of T_start is as follows:

[0100] T_start = SFN * Tmod1024.

[0101] Where SFN is the system frame number, and T is the duration of the target transmission period. When the duration between the first time point and the second time point is equal to the duration of the target transmission period, it means that RS is transmitted on all time slots within the entire first target transmission period (as Figure 7 shown).

[0102] In the embodiments of the present application, in addition to the above-mentioned method of transmitting RS as an example, it can be understood that there may be other ways to transmit RS, and specific details are not limited here.

[0103] Optionally, the network device can indicate to the non-connected UE to receive RS by adding indication information in the paging DCI or the paging message scheduled by the DCI. That is, the network device configures the detection time TD1 (i.e., the first duration) and / or TD2 (i.e., the second duration), as Figure 9 or Figure 10 shown. At the detection time TD1 at the start of a first target transmission period, in the paging DCI sent by the network device in the second PO within TD1 or the paging message scheduled by the DCI, it will indicate whether the network device transmits RS in the first target transmission period where the second PO is located according to the first period (i.e., the first indication information is used to indicate whether the network device transmits RS in the first target transmission period where the second PO is located according to the first period). At the detection time TD2 at the start of a first target transmission period, in the paging DCI sent by the network device in the third PO within TD2 or the paging message scheduled by the DCI, it will indicate whether the network device transmits RS in one or more first target transmission periods after the third P according to the first period (i.e., the second indication information is used to indicate whether the network device transmits RS in one or more first target transmission periods after the third PO according to the first period). If the network device configures the detection time TD, the configuration information in step 502 further includes the relevant parameters of the detection time TD.

[0104] Among them, the indication message can be in the paging DCI sent by the PO, or in the paging message scheduled by the DCI, or in other ways, and specific details are not limited here.

[0105] Furthermore, the network device only adds indication information when the time slot interval between the PO and the first target transmission period reaches the target threshold, and the target threshold is set according to actual needs, for example: 2 time slots, etc., and specific details are not limited here.

[0106] 503. The terminal device determines whether the access network side transmits RS within the target transmission period.

[0107] After receiving the configuration information for receiving RS, the UE determines whether the access network side transmits RS within the target transmission period.

[0108] In the embodiments of the present application, there are various ways for the terminal device to determine whether the network device sends the RS during the target sending period, which are described below respectively.

[0109] 1. The non-connected UE blindly detects whether the network device sends the RS. The specific steps are as follows.

[0110] The non-connected UE receives the target signal according to the frequency and time indicated by the configuration information of the RS. The UE calculates the received signal quality of the target signal. If the received signal quality meets the preset condition, the UE determines that the network device sends the RS during the target sending period (that is, the target sending period is the first target sending period). If the received signal quality does not meet the preset condition, the UE determines that the network device does not send the RS during the target sending period (that is, the target sending period is the second target sending period). The preset condition in the embodiments of the present application is set according to actual needs. For example, the preset condition may be that the received signal quality meets a value, which is not specifically limited here.

[0111] The target signal in the embodiments of the present application may be the reference signal receiving power (RSRP), or the reference signal receiving quality (RSRQ), or other signals. For example, the target signal is the reference signal strength indicator (RSSI), which is not specifically limited here.

[0112] Exemplarily, when the target signal is RSRP, the non-connected UE calculates that the received signal quality of the target signal is 90 decibels milliwatt (dBm), and the preset condition is not less than 85 dBm. Then, the received signal quality of the target signal meets the preset condition, and it is determined that the network device sends the RS according to the first period during the target sending period.

[0113] 2. The non-connected UE determines whether the access network side sends the RS during the target sending period through the indication information in the PO.

[0114] In the embodiments of the present application, there are various ways for the non-connected UE to determine whether the access network side sends the RS during the target sending period through the indication information in the PO, which are described below respectively:

[0115] 2.1 The disconnected UE determines the second PO or the third PO corresponding to its own UE ID, checks whether the paging DCI or the paging message scheduled by the DCI contains the first indication information or the second indication information, and then receives the RS according to the first indication information or the second indication information. The first indication information is used to instruct the network device to send the RS according to the first period within the target transmission period where the second PO is located. The second indication information is used to instruct the network device to send the RS according to the first period within one or more target transmission periods after the third PO.

[0116] 2.2 The disconnected UE determines the fourth PO or the fifth PO corresponding to other UEs, checks whether the paging DCI or the paging message scheduled by the DCI contains the third indication information or the fourth indication information, and then receives the RS according to the third indication information or the fourth indication information. The third indication information is used to instruct the network device to send the RS according to the first period within the target transmission period where the fourth PO is located. The fourth indication information is used to instruct the network device to send the RS according to the first period within one or more target transmission periods after the fifth PO.

[0117] In the embodiments of the present application, the UE can indicate whether to send the RS within the current or subsequent target transmission period through the PO, reducing the blind detection overhead of the UE.

[0118] In the embodiments of the present application, there are multiple ways for the disconnected UE to determine whether the network device sends the RS in the target transmission period. The above two ways are only examples, and the specific determination method is not limited here.

[0119] 504. The terminal device receives the RS.

[0120] When the disconnected UE determines that the network device sends the RS in the target transmission period (that is, determines which target transmission period is the first target transmission period), it receives the RS within the first target transmission period.

[0121] Optionally, the UE can also first determine the PO and try to receive the RS on the time slot of the PO.

[0122] Exemplarily, when the RS is the TRS, after the disconnected UE receives the CSI-RS or the TRS, it can use the TRS within the first target transmission period for operations such as time-frequency offset estimation and automatic gain control, and does not need to receive the SSB before the PO. Moreover, the transmission bandwidth, time, and frequency-domain density of the TRS are greater than those of the SSB, having better transmission resource performance.

[0123] In the embodiments of the present application, the network device sends the configuration information of one or more RSs, configures the target transmission period, and sends the RS according to a first period within the first target transmission period. The target transmission period includes the first target transmission period and the second target transmission period, and no RS is sent in the second target transmission period. As a result, the RS is only sent in a part of the target transmission period, that is, the RS is not an always-on signal, and the RS is not made into a cell-specific signal, which facilitates the subsequent evolution of NR. Moreover, the period of the RS can be less than 20 ms, and the corresponding wake-up time can be shorter than that of the SSB, which is beneficial for the UE to save power consumption.

[0124] The above describes the reference signal reception method in the embodiments of the present application. The following describes the network device in the embodiments of the present application. Please refer to Figure 11 , an embodiment of the network device in the embodiments of the present application includes:

[0125] A transceiver unit 1101, configured to send configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS.

[0126] The transceiver unit 1101 is further configured to send the RS according to a first period within the first target transmission period, and the first target transmission period belongs to at least one periodic target transmission period.

[0127] In this embodiment, the operations performed by each unit of the network device are similar to those described in the foregoing Figure 5 illustrated embodiment, and will not be described in detail here.

[0128] In this embodiment, the transceiver unit 1101 sends the configuration information of the reference signal RS to the terminal device, configures the target transmission period, and sends the RS according to a first period within the first target transmission period. The target transmission period includes the first target transmission period. As a result, the RS is only sent in a part of the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is short, which is beneficial for the UE to save power consumption.

[0129] Please refer to Figure 12 , another embodiment of the network device in the embodiments of the present application includes:

[0130] A transceiver unit 1201, configured to send configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS.

[0131] The transceiver unit 1201 is further configured to send the RS according to a first period within the first target transmission period, and the first target transmission period belongs to at least one periodic target transmission period.

[0132] The network device in this embodiment further includes:

[0133] A processing unit 1202, configured to determine a first paging occasion PO.

[0134] The processing unit 1202 is further configured to determine a second PO, where the second PO is within an initial first time period in a first target transmission period.

[0135] The processing unit 1202 is further configured to determine a third PO, where the third PO is within a second time period before the first target transmission period.

[0136] In this embodiment, the operations performed by each unit of the network device are similar to those described in the foregoing Figure 5 illustrated embodiment, and will not be elaborated herein.

[0137] In this embodiment, the transceiver unit 1201 sends configuration information of a reference signal RS to the terminal device. By configuring a target transmission period and sending the RS within the first target transmission period according to a first period, the target transmission period includes the first target transmission period. Thereby, the RS is sent only in a part of the time periods within the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is shorter. On the one hand, it is beneficial for the UE to save power consumption. On the other hand, the processing unit 1202 indicates to the terminal device in what target transmission time period to receive by sending indication information, improving the efficiency of the terminal side receiving the RS.

[0138] Next, the terminal device in the embodiment of the present application will be described. Please refer to Figure 13 , an embodiment of the terminal device in the embodiment of the present application includes:

[0139] A transceiver unit 1301, configured to receive configuration information of a reference signal RS from a network device, where the configuration information is used to indicate at least one periodic target transmission period of the RS.

[0140] A processing unit 1302, configured to determine whether the network device sends the RS within the target transmission period.

[0141] The transceiver unit 1301 is further configured to, if so, receive the RS.

[0142] In this embodiment, the operations performed by each unit of the terminal device are similar to those described in the foregoing Figure 5 illustrated embodiment, and will not be elaborated herein.

[0143] In this embodiment, the transceiver unit 1301 receives the configuration information of the reference signal RS, and the processing unit 1302 determines whether the network device sends the RS within the target transmission period; if so, the transceiver unit 1301 receives the RS. Thereby, the RS is received only in a part of the time periods within the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is shorter, which is beneficial for the UE to save power consumption.

[0144] Optionally, the processing unit 1302 in this embodiment is further configured to determine a first paging occasion PO.

[0145] The processing unit 1302 is further configured to calculate the received signal quality of the target signal.

[0146] The processing unit 1302 is further configured to determine that the network device sends the RS within the target transmission period if the received signal quality meets a preset condition.

[0147] The processing unit 1302 is further configured to determine that the network device does not send the RS within the target transmission period if the received signal quality does not meet the preset condition.

[0148] The processing unit 1302 is further configured to determine a second PO, and the second PO is within the first duration at the beginning of the first target transmission period.

[0149] The processing unit 1302 is further configured to determine a third PO, and the third PO is within the second duration before the first target transmission period.

[0150] The processing unit 1302 is further configured to perform time-frequency tracking based on the RS.

[0151] In this embodiment, the operations performed by each unit of the terminal device are similar to those described in the foregoing Figure 5 illustrated embodiment, and will not be described herein again.

[0152] In this embodiment, the transceiver unit 1301 receives the configuration information of the reference signal RS, and the processing unit 1302 determines whether the network device sends the RS within the target transmission period; if so, the transceiver unit 1301 receives the RS. Thus, the RS is received only in a part of the target transmission period, that is, the RS is not an always-on signal, and the wake-up time of the UE is shorter. On the one hand, it is beneficial for the UE to save power. On the other hand, by receiving the indication information, the network device is instructed to send the RS in what target transmission time period, improving the efficiency of the transceiver unit 1301 to receive the RS. On the other hand, the processing unit 1302 does not need to receive the SSB for time-frequency tracking before the PO. And when the RS is a TRS, the transmission bandwidth, time, and frequency-domain density of the TRS are greater than those of the SSB, having better transmission resource performance.

[0153] The network device in the embodiment of the present application will be described below. Please refer to Figure 14 , another embodiment of the network device in the embodiment of the present application includes:

[0154] The network device 1400 includes at least one processor 1401 and at least one communication interface (i.e., Figure 14The input / output interface 1404). The input / output interface 1404 is used to provide input / output of data and / or information for the processor 1401, and the processor 1401 is used to process the data and / or information.

[0155] Optionally, the network device 1400 further includes a memory 1405, and the processor 1401 is coupled to the memory 1405 and the input / output interface 1404. The memory 1405 can be volatile storage or persistent storage. The program stored in the memory 1405 may include one or more modules, and each module may include a series of instruction operations on the server. Further, the processor 1401 may be configured to communicate with the memory 1405 and execute a series of instruction operations in the memory 1405 on the network device 1400.

[0156] The network device 1400 may further include at least one power supply 1402, at least one wired or wireless network interface 1403, and / or at least one operating system, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

[0157] The processor 1401 may perform the operations performed by the network device in the foregoing Figure 5 illustrated embodiments, and details are not described herein again.

[0158] The embodiment of the present application further provides another terminal device, as Figure 15 shown. For the sake of convenience of description, only the parts related to the embodiment of the present application are shown. For the specific technical details not disclosed, please refer to the method part of the embodiment of the present application. The terminal device may be any terminal device including a mobile phone, a tablet computer, a personal digital assistant (PDA), a point of sales (POS) device, an in-vehicle computer, etc. Taking the terminal device as a mobile phone as an example:

[0159] Figure 15 Shown is a block diagram of a part of the structure of a mobile phone related to the terminal device provided by the embodiment of the present application. Referring to Figure 15 , the mobile phone includes: a radio frequency (RF) circuit 1510, a memory 1520, an input unit 1530, a display unit 1540, a sensor 1550, an audio circuit 1560, a wireless fidelity (WiFi) module 1570, a processor 1580, and a power supply 1590 and other components. Those skilled in the art can understand, Figure 15The mobile phone structure shown does not constitute a limitation on the mobile phone, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0160] The following will specifically introduce each component of the mobile phone in conjunction with Figure 15 :

[0161] The RF circuit 1510 can be used for receiving and transmitting information or signals during a call. Specifically, after receiving the downlink information from the base station, it is given to the processor 1580 for processing; in addition, it transmits the uplink data designed to the base station. Generally, the RF circuit 1510 includes, but is not limited to, antennas, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the RF circuit 1510 can also communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to the Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0162] The memory 1520 can be used to store software programs and modules. The processor 1580 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 1520. The memory 1520 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, applications required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory 1520 can include high-speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0163] The input unit 1530 can be used to receive input numeric or character information and generate key signal inputs related to the user settings and function controls of the mobile phone. Specifically, the input unit 1530 can include a touch panel 1531 and other input devices 1532. The touch panel 1531, also known as a touch screen, can collect touch operations of the user thereon or nearby (such as operations of the user using any suitable object or accessory such as a finger, a stylus, etc. on or near the touch panel 1531), and drive corresponding connection devices according to a pre-set program. Optionally, the touch panel 1531 can include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the touch orientation of the user, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, then sends it to the processor 1580, and can receive and execute commands sent by the processor 1580. In addition, the touch panel 1531 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1531, the input unit 1530 can also include other input devices 1532. Specifically, the other input devices 1532 can include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, etc.

[0164] The display unit 1540 can be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 1540 can include a display panel 1541. Optionally, the display panel 1541 can be configured in forms such as a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. Further, the touch panel 1531 can cover the display panel 1541. When the touch panel 1531 detects a touch operation thereon or nearby, it is transmitted to the processor 1580 to determine the type of the touch event. Subsequently, the processor 1580 provides corresponding visual output on the display panel 1541 according to the type of the touch event. Although in Figure 15 the touch panel 1531 and the display panel 1541 are implemented as two independent components to realize the input and output functions of the mobile phone, in some embodiments, the touch panel 1531 and the display panel 1541 can be integrated to realize the input and output functions of the mobile phone.

[0165] The mobile phone may further include at least one sensor 1550, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. Among them, the ambient light sensor can adjust the brightness of the display panel 1541 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1541 and / or the backlight when the mobile phone is moved to the ear. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when stationary, and can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors that the mobile phone can also be configured with, they will not be elaborated here.

[0166] The audio circuit 1560, the speaker 1561, and the microphone 1562 can provide an audio interface between the user and the mobile phone. The audio circuit 1560 can transmit the electrical signal converted from the received audio data to the speaker 1561, and the speaker 1561 converts it into a sound signal for output; on the other hand, the microphone 1562 converts the collected sound signal into an electrical signal, which is received by the audio circuit 1560 and then converted into audio data. After the audio data is output to the processor 1580 for processing, it is sent through the RF circuit 1510 to, for example, another mobile phone, or the audio data is output to the memory 1520 for further processing.

[0167] WiFi belongs to short-range wireless transmission technology. The mobile phone can help users send and receive emails, browse the web, and access streaming media through the WiFi module 1570, which provides users with wireless broadband Internet access. Although Figure 15 the WiFi module 1570 is shown, it can be understood that it does not belong to an essential component of the mobile phone.

[0168] The processor 1580 is the control center of the mobile phone, connecting various parts of the entire mobile phone using various interfaces and lines. By running or executing software programs and / or modules stored in the memory 1520, and by calling data stored in the memory 1520, it executes various functions of the mobile phone and processes data, thereby monitoring the mobile phone as a whole. Optionally, the processor 1580 may include one or more processing units; preferably, the processor 1580 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 1580.

[0169] The mobile phone further includes a power source 1590 (such as a battery) for powering each component. Preferably, the power source can be logically connected to the processor 1580 through a power management system, so as to manage functions such as charging, discharging, and power consumption management through the power management system.

[0170] Although not shown, the mobile phone may further include a camera, a Bluetooth module, etc., which will not be elaborated here.

[0171] In the embodiments of the present application, the processor 1580 included in the terminal device may execute the functions of the terminal device in the foregoing Figure 5 illustrated embodiments, which will not be elaborated here.

[0172] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0173] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0174] In addition, the functional units in each embodiment of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0175] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, read-only memory), random access memories (RAM, random access memory), magnetic disks, or optical discs that can store program codes.

Claims

1. A method for transmitting a reference signal, characterized in that, it includes: sending configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; sending first indication information to the terminal device in a paging downlink control information (paging DCI), where the first indication information is used to indicate that a network device transmits the RS within a first target transmission period; transmitting the RS according to a first period within the first target transmission period, and the first target transmission period belongs to the at least one periodic target transmission period.

2. The method according to claim 1, characterized in that, the method further includes: determining a first paging occasion (PO); transmitting the RS according to a first period within the first target transmission period, including: transmitting the RS according to the first period within at least one time slot within the first target transmission period, where the at least one time slot is a time slot included in the first PO, or the at least one time slot is a time slot included in the first PO and one or more time slots before the time slot included in the first PO.

3. The method according to claim 1, characterized in that, the method further includes: the time period of the at least one periodic target transmission period is greater than the time period of the first period.

4. The method according to claim 1, characterized in that, the method further includes: the paging DCI is located within an initial first time duration within the first target transmission period.

5. The method according to claim 1, characterized in that, the method further includes: determining a second PO, where the paging DCI is within the second PO, and the second PO is located within an initial first time duration within the first target transmission period.

6. The method according to claim 1, characterized in that, the method further includes: determining a third PO, where the third PO is within a second time duration before the first target transmission period; sending second indication information to the terminal device within the third PO, where the second indication information is used to indicate that the network device transmits the RS within the first target transmission period.

7. The method according to claim 1, characterized in that, the configuration information is further used to indicate a first time point and a second time point within the first target transmission period; transmitting the RS according to the first period within the first target transmission period, including: transmitting the RS according to the first period between the first time point and the second time point.

8. The method according to any one of claims 1 to 7, characterized in that, the RS is a CSI-RS or a TRS.

9. A method for transmitting a reference signal, characterized in that, it includes: receiving configuration information of a reference signal RS from a network device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; judging whether paging downlink control information (paging DCI) contains first indication information, where the first indication information is used to indicate that the network device transmits the RS within a first target transmission period; If so, receive the RS according to the first indication information within the first target transmission period, where the first target transmission period belongs to the at least one periodic target transmission period.

10. The method according to claim 9, wherein, the method further comprises: determining a first paging occasion PO; receiving the RS includes: receiving the RS on at least one time slot within the target transmission period, where the at least one time slot is the time slot included in the first PO, or the at least one time slot is the time slot included in the first PO and one or more time slots before the time slot included in the first PO.

11. The method according to claim 9, wherein, judging whether the network device transmits the RS within the target transmission period includes: receiving a target signal according to the configuration information of the reference signal RS transmitted by the network device; calculating the received signal quality of the target signal; judging whether the received signal quality of the target signal meets a preset condition; the method further comprises: if the received signal quality meets the preset condition, determining that the network device transmits the RS within the target transmission period; if the received signal quality does not meet the preset condition, determining that the network device does not transmit the RS within the target transmission period.

12. The method according to claim 9, wherein, the method further comprises: the paging DCI is within the first duration at the beginning of the first target transmission period.

13. The method according to claim 9, wherein, the method further comprises: determining a second PO, where the paging DCI is within the second PO, and the second PO is within the first duration at the beginning of the first target transmission period.

14. The method according to claim 9, wherein, the method further comprises: determining a third PO, where the third PO is within a second duration before the first target transmission period; judging whether the network device transmits the RS within the target transmission period includes: judging whether the second indication information for indicating that the network device transmits the RS within the first target transmission period is included in the third PO; receiving the RS includes: receiving the RS according to the second indication information.

15. The method according to any one of claims 9 to 14, wherein, the configuration information is further used to indicate a first time point and a second time point within the target transmission period; receiving the RS includes: receiving the RS within the time period between the first time point and the second time point.

16. The method according to any one of claims 9 to 14, wherein, after receiving the RS, the method further comprises: performing time-frequency tracking according to the RS.

17. The method according to any one of claims 9 to 14, wherein, the RS is a CSI-RS or a TRS.

18. A network device, wherein, comprises: A transceiver unit, configured to send configuration information of a reference signal RS to a terminal device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; The transceiver unit is further configured to send first indication information to the terminal device in a paging downlink control information (paging DCI), where the first indication information is used to indicate that the network device sends the RS within a first target transmission period; The transceiver unit is further configured to send the RS according to a first period within the first target transmission period, where the first target transmission period belongs to the at least one periodic target transmission period.

19. The network device according to claim 18, characterized in that the network device further comprises: a processing unit, configured to determine a first paging occasion (PO); The transceiver unit is specifically configured to send the RS according to the first period within at least one time slot within the first target transmission period, where the at least one time slot is a time slot included in the first PO, or the at least one time slot is a time slot included in the first PO and one or more time slots before the time slot included in the first PO.

20. The network device according to claim 18, characterized in that a time period of the at least one periodic target transmission period is greater than a time period of the first period.

21. The network device according to claim 18, characterized in that the network device further comprises: the paging DCI is located within an initial first time period of the first target transmission period.

22. The network device according to claim 18, characterized in that the network device further comprises: a processing unit, configured to determine a second PO, where the paging DCI is within the second PO, and the second PO is located within an initial first time period of the first target transmission period.

23. The network device according to claim 18, characterized in that the network device further comprises: a processing unit, configured to determine a third PO, where the third PO is located within a second time period before the first target transmission period; The transceiver unit is further configured to send second indication information to the terminal device within the third PO, where the second indication information is used to indicate that the network device sends the RS within the first target transmission period.

24. The network device according to claim 18, characterized in that the configuration information is further used to indicate a first time point and a second time point within the first target transmission period; The transceiver unit is specifically configured to send the RS according to the first period between the first time point and the second time point.

25. The network device according to any one of claims 18 to 24, characterized in that the RS is a CSI-RS or a TRS.

26. A communication device, where the communication device is a terminal device or a chip of the terminal device, characterized in that it comprises: a transceiver unit, configured to receive configuration information of a reference signal RS from a network device, where the configuration information is used to indicate at least one periodic target transmission period of the RS; A processing unit, configured to determine whether first indication information is included in paging downlink control information (paging DCI), where the first indication information is used to indicate that the network device sends the RS within a first target transmission period; The transceiver unit is further configured to, if yes, receive the RS according to the first indication information within the first target transmission period, where the first target transmission period belongs to the at least one periodic target transmission period.

27. The communication device according to claim 26, wherein: The processing unit is further configured to determine a first paging occasion (PO); The transceiver unit is specifically configured to receive the RS on at least one time slot within the target transmission period, where the at least one time slot is a time slot included in the first PO, or the at least one time slot is a time slot included in the first PO and one or more time slots before the time slot included in the first PO.

28. The communication device according to claim 26, wherein: The transceiver unit is further configured to receive a target signal according to configuration information of the reference signal (RS) sent by the network device; The processing unit is further configured to calculate a received signal quality of the target signal; The processing unit is specifically configured to determine whether the received signal quality of the target signal meets a preset condition; The processing unit is further configured to, if the received signal quality meets the preset condition, determine that the network device sends the RS within the target transmission period; The processing unit is further configured to, if the received signal quality does not meet the preset condition, determine that the network device does not send the RS within the target transmission period.

29. The communication device according to claim 26, wherein: The processing unit is further configured to determine that the paging DCI is within an initial first duration in the first target transmission period.

30. The communication device according to claim 26, wherein: The processing unit is further configured to determine a second PO, where the paging DCI is within the second PO, and the second PO is within an initial first duration in the first target transmission period.

31. The communication device according to claim 26, wherein: The processing unit is further configured to determine a third PO, where the third PO is within a second duration before the first target transmission period; The processing unit is specifically configured to determine whether second indication information is included in the third PO, where the second indication information is used to indicate that the network device sends the RS within the first target transmission period; The transceiver unit is specifically configured to receive the RS according to the second indication information.

32. The communication device according to any one of claims 26 to 31, wherein: The configuration information is further used to indicate a first time point and a second time point within the target transmission period; The transceiver unit is specifically configured to receive the RS within a time period between the first time point and the second time point.

33. The communication device according to any one of claims 26 to 31, wherein: The processing unit is further configured to perform time-frequency tracking according to the RS.

34. The communication device according to any one of claims 26 to 31, wherein, the RS is CSI-RS or TRS.

35. A network device, wherein, comprising: at least one processor and at least one communication interface; the at least one communication interface is configured to provide input / output of data and / or information for the at least one processor; the at least one processor is configured to process the data and / or information so that the network device implements the method according to any one of claims 1-8.

36. A communication device, the communication device being a terminal device or a chip of the terminal device, wherein, comprising: at least one processor and at least one communication interface; the at least one communication interface is configured to provide input / output of data and / or information for the at least one processor; the at least one processor is configured to process the data and / or information so that the communication device implements the method according to any one of claims 9-17.

37. A computer-readable storage medium, wherein, instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 17.

38. A computer program product, wherein, when the computer program product is executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 17.

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