WO2021203239A1 - Downlink synchronization method, electronic device, and storage medium - Google Patents

Abstract

Disclosed in the present application is a downlink synchronization method, comprising: a terminal device receives first indication information, wherein the first indication information is used for determining channel status indicator reference signal resource information, and the channel status indicator reference signal resource information is used for a non-connected terminal device to perform downlink synchronization. Further disclosed in the present application are another downlink synchronization method, an electronic device, and a storage medium.

Description

Downlink synchronization method, electronic equipment and storage medium Technical field

This application relates to the field of wireless communication technologies, and in particular to a downlink synchronization method, electronic equipment, and storage medium.

Background technique

In related technologies, how to effectively save power consumption of the terminal equipment during the downlink synchronization process of the terminal equipment (User Equipment, UE) has not yet been clarified.

Summary of the invention

The embodiments of the present application provide a downlink synchronization method, an electronic device, and a storage medium, which can effectively save the power consumption of the terminal device.

In the first aspect, an embodiment of this application provides a downlink synchronization method, including: a terminal device receives first indication information; the first indication information is used to determine a channel status indicator reference signal (CSI-RS) Resource information, the CSI-RS resource information is used for a non-connected terminal device to perform downlink synchronization.

In the second aspect, an embodiment of the present application provides a downlink synchronization method, including: a network device sends first indication information; the first indication information is used by a terminal device to determine CSI-RS resource information, and the CSI-RS resource information is used for Perform downlink synchronization with terminal equipment in a non-connected state.

In a third aspect, an embodiment of the present application provides a terminal device, the terminal device includes: a receiving unit configured to receive first indication information; the first indication information is used to determine CSI-RS resource information, and the CSI-RS The RS resource information is used for the downlink synchronization of the terminal equipment in the unconnected state.

In a fourth aspect, an embodiment of the present application provides a network device, the network device includes: a sending unit configured to send first indication information; the first indication information is used by a terminal device to determine CSI-RS resource information, the The CSI-RS resource information is used for the unconnected terminal equipment to perform downlink synchronization.

In a fifth aspect, an embodiment of the present application provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. Steps of the downlink synchronization method executed by the device.

In a sixth aspect, an embodiment of the present application provides a network device, including a processor and a memory configured to store a computer program that can run on the processor, wherein the processor is configured to execute the above-mentioned network when the computer program is running. Steps of the downlink synchronization method executed by the device.

In a seventh aspect, an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the aforementioned downlink synchronization method executed by the terminal device.

In an eighth aspect, an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the downlink synchronization method performed by the above-mentioned network device.

In a ninth aspect, an embodiment of the present application provides a storage medium that stores an executable program, and when the executable program is executed by a processor, the above-mentioned downlink synchronization method executed by the terminal device is implemented.

In a tenth aspect, an embodiment of the present application provides a storage medium that stores an executable program, and when the executable program is executed by a processor, the above-mentioned downlink synchronization method executed by the network device is implemented.

In an eleventh aspect, an embodiment of the present application provides a computer program product, including computer program instructions, which cause a computer to execute the downlink synchronization method executed by the above-mentioned terminal device.

In a twelfth aspect, an embodiment of the present application provides a computer program product, including computer program instructions, which cause a computer to execute the downlink synchronization method executed by the aforementioned network device.

In a thirteenth aspect, an embodiment of the present application provides a computer program that enables a computer to execute the downlink synchronization method executed by the above-mentioned terminal device.

In a fourteenth aspect, an embodiment of the present application provides a computer program that enables a computer to execute the downlink synchronization method executed by the aforementioned network device.

The downlink synchronization method, electronic device, and storage medium provided by the embodiments of the application include: a terminal device receives first indication information; the first indication information is used to determine CSI-RS resource information, and the CSI-RS resource information is used for The non-connected terminal device performs downlink synchronization. In this way, the terminal device can use the CSI-RS resource for downlink synchronization before the paging opportunity arrives; because the time domain period of the CSI-RS resource is shorter, the time for the terminal device to complete the downlink synchronization based on the CSI-RS resource is compared with that of the paging The time interval for the start of the opportunity can be shorter, which can effectively save the power consumption of the terminal device.

Description of the drawings

FIG. 1 is a schematic diagram of the composition structure of a communication system according to an embodiment of the application;

2 is a schematic diagram of an optional processing flow of a downlink synchronization method according to an embodiment of this application;

FIG. 3 is a schematic diagram of a detailed optional processing flow of a downlink synchronization method according to an embodiment of this application;

FIG. 4 is an optional schematic diagram of downlink synchronization performed by a terminal device according to an embodiment of the application;

FIG. 5 is a schematic diagram of another detailed optional processing flow of a downlink synchronization method according to an embodiment of this application;

FIG. 6 is another optional schematic diagram of downlink synchronization performed by a terminal device according to an embodiment of the application;

FIG. 7 is a schematic diagram of yet another detailed optional processing flow of the downlink synchronization method according to an embodiment of this application;

FIG. 8 is another optional schematic diagram of downlink synchronization performed by a terminal device according to an embodiment of this application;

FIG. 9 is a schematic diagram of still another detailed optional processing flow of the downlink synchronization method according to an embodiment of this application;

FIG. 10 is another optional schematic diagram of downlink synchronization performed by a terminal device according to an embodiment of this application;

11 is a schematic diagram of a processing flow of a downlink synchronization method based on valid time according to an embodiment of this application;

FIG. 12 is a schematic diagram of another optional processing flow of a downlink synchronization method according to an embodiment of this application;

FIG. 13 is a schematic diagram of an optional structure of a terminal device according to an embodiment of the application;

FIG. 14 is a schematic diagram of an optional composition structure of a network device according to an embodiment of the application;

FIG. 15 is a schematic diagram of the hardware composition structure of an electronic device according to an embodiment of the application.

Detailed ways

In order to have a more detailed understanding of the characteristics and technical content of the embodiments of the present application, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and explanation purposes only, and are not used to limit the embodiments of the present application.

Before describing the embodiments of the present application, the relevant content is briefly described.

At present, with people's pursuit of speed, delay, high-speed mobility, energy efficiency, and the diversity and complexity of services in future life, the 3GPP International Standards Organization has begun to develop 5G. The main application scenarios of 5G are: Enhance Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and Massive Machine Type Communication (mMTC).

The New Radio (NR) system can also be deployed independently. In order to reduce air interface signaling, quickly restore wireless connections, and quickly restore data services, a new Radio Resource Control (RRC) state is defined, that is, deactivation ( RRC-Inactive) state. Among them, in the idle (RRC-Idle) state, mobility is cell reselection based on terminal equipment, the paging process is initiated by the core network (Core Network, CN), and the paging area is configured by the CN. There is no terminal device context or RRC connection on the network device side. In the RRC-Inactive state, mobility is cell reselection based on terminal equipment, there is a connection between CN-NR, the context of terminal equipment exists on a certain network device, the paging process is triggered by RAN, and the paging area is based on RAN Managed by the RAN, the network equipment can know that the location of the terminal equipment is based on the paging area level of the RAN.

The paging mechanism in the NR system will be described below.

The main function of paging is that when the terminal device is in the radio resource control (Radio Resource Control, RRC) idle state (IDLE) or the RRC deactivated state (INACTIVE), the network device can page the terminal device through a paging message (paging message), or Notify the terminal equipment of system message changes or earthquake and tsunami/public warning information through short messages. Of course, Paging is also applicable to terminal devices in the RRC connected state, that is, Paging is applicable to all terminal devices in the RRC state.

The content of the paging may include the PDCCH scrambled by the Paging Radio Network Temporary Identifier (P-RNTI), and the physical downlink shared channel (Physical Downlink Share Channel, PDSCH) scheduled by the PDCCH. The paging message can be transmitted in the PDSCH; the size of the short message is 8 bits, and the short message can be in the PDCCH.

For the terminal device in the RRC_IDLE state or RRC_INACTIVE state, since there is no data communication between the terminal device and the network device, in order to save the power of the terminal device, the terminal device can monitor the Paging channel non-continuously, that is, use Paging Discontinuous Reception (Discontinuous Reception). , DRX) mechanism. Under the paging DRX mechanism, the terminal device only needs to monitor paging during one paging occasion (Paging Occasion, PO) in each DRX cycle (cycle). The PO includes multiple PDCCH monitoring opportunities, and at the same time, the PO can be composed of multiple time slots. A paging frame (Paging Frame, PF) refers to a radio frame, the duration of the FP is 10 ms, and a PF may contain multiple POs or the starting positions of multiple POs.

The DRX cycle is determined by the public cycle in the system broadcast sent by the network equipment and the exclusive cycle configured in the high-level signaling. The terminal equipment can choose the smallest cycle of the two as the DRX cycle; the high-level signaling can be the non-access layer ( Non-Access Stratum, NAS) signaling. From the perspective of a network device, there can be multiple POs in a DRX cycle, and the location where the terminal device monitors the PO is related to the identifier (ID) of the terminal device. Specifically, the method for determining the PF and PO of a terminal device in a DRX cycle is as follows (TS 38.304):

The System Frame Number (SFN) of PF is determined by the following formula:

(SFN+PF_offset) mod T = (T div N) * (UE_ID mod N) (1)

The number Index_(i_s) where the PO is located in a PF is determined by the following formula:

i_s=floor(UE_ID/N)mod Ns (2)

Among them, T is the DRX cycle for the terminal device to receive Paging. The network device will broadcast a default DRX cycle; if the network device configures the terminal device with a dedicated DRX cycle for the terminal device through RRC signaling/high-level signaling, the DRX cycle and RRC signaling/high-level signaling that the network device broadcasts The smallest one of the configured DRX cycles dedicated to the terminal device is used as the DRX cycle of the terminal device. If the network device does not configure the terminal device with a dedicated DRX cycle for the terminal device through RRC signaling/high-level signaling, the DRX cycle broadcast by the network device is taken as the DRX cycle of the UE. N is the number of PFs included in a DRX cycle. Ns is the number of POs contained in a PF. PF-offset is the time domain offset used to determine the PF. UE_ID is 5G-S-TMSI mod 1024.

The NR system supports network equipment to configure synchronization signal block (Synchronization Signal Block, SSB) measurement and channel status indicator reference signal (Channel Status Indicator Reference Signal, CSI-RS) measurement for connected terminal equipment. Specifically, it is reflected in the measurement configuration. For SSB measurement, the network device configures the terminal device with the SSB frequency associated with the measurement object; since the NR system supports multiple transmissions with different subcarrier intervals, the measurement object needs to indicate the measurement-related SSB Subcarrier spacing. For CSI-RS measurement, a reference frequency point that maps the CSI-RS to the physical resource is configured in the measurement object. For the measurement configuration of the SSB reference signal, the measurement object additionally indicates the time window information of the SSB measurement, that is, the SSB measurement timing configuration (SS/PBCH block measurement timing configuration, SMTC) information. Further, the network device may also instruct the terminal device to measure which SSBs in the SMTC (for example, SSB-ToMeasure) and other information. For the measurement configuration of the CSI-RS reference signal, the measurement object includes the configuration of the CSI-RS resource.

For CSI measurement and reporting, the 5G system supports network devices to configure CSI measurement and reporting for connected terminal devices for more accurate data scheduling and transmission by network devices. Unlike RRM, which measures multiple cells on the entire frequency point, CSI measurement only measures the serving cell. The network equipment can configure a set of CSI measurement configuration (CSI-MeasConfig) for each serving cell. A set of CSI-MeasConfig contains multiple sets of CSI resource configuration (CSI-ResourceConfig), indicating the CSI-RS resources used for CSI measurement. And the associated bandwidth part (BandWidth Part, BWP); among them, CSI-ResourceConfig is as follows.

The NR system only supports the SSB measurement of the terminal equipment in the idle state and the deactivated state, and the terminal equipment performs cell reselection or cell selection based on the SSB measurement. SSB measurement is achieved by configuring the SSB measurement timing configuration (SS/PBCH block measurement timing configuration, SMTC) on the corresponding frequency point.

For the terminal equipment in the idle state or in the deactivated state, the Paging channel can be monitored non-continuously, that is, the Paging Discontinuous Reception (DRX) mechanism is adopted. Under the Paging DRX mechanism, the terminal device only needs to monitor the P-RNTI scrambled PDCCH when the paging occasion (Paging Occasion, PO) in each DRX cycle (cycle) arrives; the terminal device does not monitor the P-RNTI at other times Scramble the PDCCH and turn off the receiver to save power. After the terminal device turns off the receiver, it cannot maintain downlink synchronization with the serving cell. At present, the downlink synchronization of the terminal equipment in the idle state or the deactivated state is based on the SSB signal; the applicant found that the long period of the SSB signal will cause the gap between the SSB signal and the PO to be larger when implementing the downlink synchronization. The terminal device cannot completely turn off the receiver in the time between the time after downlink synchronization based on the SSB signal and the PO arrival time; the failure to completely turn off the receiver during this long period of time will increase the energy consumption of the terminal device.

The technical solutions of the embodiments of this application can be applied to various communication systems, for example: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD) system, advanced long term evolution (LTE-A) system, new radio (NR) system, evolution system of NR system, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, universal mobile telecommunication system (UMTS), global Connected microwave access (worldwide interoperability for microwave access, WiMAX) communication systems, wireless local area networks (WLAN), wireless fidelity (WiFi), next-generation communication systems or other communication systems, etc.

The system architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The network equipment involved in the embodiments of this application may be a common base station (such as NodeB or eNB or gNB), a new radio controller (NR controller), a centralized network element (centralized unit), a new radio base station, Radio remote module, micro base station, relay, distributed unit, reception point (transmission reception point, TRP), transmission point (transmission point, TP), or any other equipment. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. For the convenience of description, in all the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for terminal devices are collectively referred to as network devices.

In the embodiment of the present application, the terminal device may be any terminal. For example, the terminal device may be a user equipment for machine-type communication. That is to say, the terminal equipment can also be referred to as user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc., and the terminal device can be accessed via a radio access network. network, RAN) communicates with one or more core networks. For example, the terminal device can be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal device can also be a portable or pocket-sized , Handheld, computer built-in or vehicle-mounted mobile devices that exchange language and/or data with the wireless access network. There is no specific limitation in the embodiments of this application.

Optionally, network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites. The embodiments of the present application do not limit the application scenarios of network equipment and terminal equipment.

Optionally, communication between network equipment and terminal equipment and between terminal equipment and terminal equipment can be carried out through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and terminal equipment at the same time. Unlicensed spectrum for communication. Between network equipment and terminal equipment and between terminal equipment and terminal equipment, communication can be carried out through the frequency spectrum below 7 gigahertz (gigahertz, GHz), communication can also be carried out through the frequency spectrum above 7 GHz, and the frequency spectrum below 7 GHz can also be used at the same time. Communication is performed in the frequency spectrum above 7GHz. The embodiment of the present application does not limit the spectrum resource used between the network device and the terminal device.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, device to device (device to device, D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.

The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. The "terminal equipment" used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment. A terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio telephone transceivers Electronic device. Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.

Optionally, the terminal devices 120 may perform direct terminal connection (Device to Device, D2D) communication.

Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 having a communication function and a terminal device 120. The network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiment of the present application.

An optional processing flow of the downlink synchronization method provided by the embodiment of the present application, as shown in FIG. 2, includes the following steps:

Step S201: The terminal device receives first indication information, where the first indication information is used to determine CSI-RS resource information, and the CSI-RS resource information is used for the unconnected terminal device to perform downlink synchronization.

In some embodiments, the first indication information may be sent by a network device, and the first indication information may be used to indicate the CSI-RS resource of the PCell; or, the first indication information may be used to indicate each service The CSI-RS resource of the cell, the serving cell may include PCell, PSCell, and SCell; or, the first indication information is used to indicate the CSI-RS resource of at least one cell, and the at least one cell may include the serving cell and neighboring cells. Community.

In some embodiments, the downlink synchronization method provided in the embodiments of the present application may further include:

Step S202: The terminal device receives second indication information, where the second indication information is used to determine the effective time for the CSI-RS resource information to be used by the terminal device in the disconnected state to perform downlink synchronization.

In some embodiments, all CSI-RS resource configurations of the cell may correspond to one valid time; or, the CSI-RS resource configuration of each cell corresponds to one valid time. Within the valid time, the non-connected terminal device can perform downlink synchronization based on the CSI-RS resource information; outside the valid period, the non-connected terminal device cannot be based on the CSI-RS resource information for downlink synchronization.

In some embodiments, the downlink synchronization method provided in the embodiments of the present application may further include:

Step S203: The terminal equipment in the non-connected state performs downlink synchronization based on the CSI-RS resource information before the paging opportunity arrives.

The downlink synchronization method provided in the embodiment of the present application will be described in detail below with respect to different indication contents and/or indication forms of the first indication information.

For the scenario where the network device indicates that the terminal device can use the CSI-RS resource of the PCell through the first indication information, the CSI-RS resource can be indicated in the form of CSI-ResourceConfigID; a detailed processing flow of the downlink synchronization method provided in the embodiment of the present application The schematic diagram, as shown in Figure 3, includes:

Step S301: The terminal device in the connected state receives the configuration of the serving cell.

In some embodiments, the connected terminal device receives the configuration of each serving cell (including PCell, SCell, and PSCell) sent by the network device through the RRC reconfiguration message; the configuration of each serving cell may include csi-MeasConfig, csi -MeasConfig indicates a set of CSI-RS resource configuration (CSI-ResourceConfig). Each CSI-ResourceConfig may include: CSI-ResourceConfigId, CSI-RS-ResourceSetList, BWP-Id and ResourceType;

Among them, a set of CSI-RS resource configurations may include at least one CSI-RS resource configuration.

Step S302: The network device sends the first indication information to the terminal device.

In some embodiments, the first indication information may be carried in an RRC message, for example, the first indication information may be carried in an RRC Release message. During the RRC connection release process, the network device may send the first indication information through the RRC Release message.

In some embodiments, the first indication information includes a first CSI-RS resource index; the first CSI-RS resource index includes a group of first CSI-ResourceConfigIDs, and the group of first CSI-ResourceConfigIDs includes at least A first CSI-ResourceConfigID.

In some embodiments, if the first indication information indicates the CSI-RS resource of the PCell that can be used by the terminal device, the first CSIResourceConfig corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the PCell, that is, The first CSI-ResourceConfig corresponding to the first CSI-RS resource index is configured in the csi-MeasConfig of the PCell.

In some embodiments, if the first indication information indicates that the terminal device can use the CSI-RS resource of the PCell, the first CSIResourceConfig corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial BWP of the PCell, That is, the first CSI-ResourceConfig corresponding to the first CSI-RS resource index is the CSI-ResourceConfig configured on the initial BWP, and the BWP-ID of the first CSI-ResourceConfig corresponding to the first CSI-RS resource index is 0 .

Step S303, in the case that the terminal device in the idle state or the deactivated state resides in the PCell, before the paging opportunity arrives, the terminal device uses the first CSI-RS resource configuration corresponding to the first CSI-RS resource index Perform downlink synchronization.

For a scenario where the network device indicates that the terminal device can use the CSI-RS resource of the PCell, an optional schematic diagram of the terminal device performing downlink synchronization is shown in FIG. 4. After the terminal device enters the idle state or the deactivated state, if the terminal device resides on the PCell, the terminal device performs the procedure before the arrival of the PO time according to the CSI-ResourceConfig information corresponding to a group of CSI-ResourceConfigId indicated in the first indication information Downlink synchronization of the cell.

For the scenario where the network device indicates the CSI-RS resource of the serving cell that the terminal device can use in the form of {cell index, CSI-ResourceConfigID} through the first indication information, another detailed processing of the downlink synchronization method provided in this embodiment of the application The process diagram, as shown in Figure 5, includes:

Step S401: The terminal device in the connected state receives the configuration of the serving cell.

In some embodiments, the connected terminal device receives the configuration of each serving cell (including PCell, SCell, and PSCell) sent by the network device through the RRC reconfiguration message; the configuration of each serving cell may include csi-MeasConfig, csi -MeasConfig indicates a set of CSI-RS resource configuration (CSI-ResourceConfig). Each CSI-ResourceConfig may include: CSI-ResourceConfigId, CSI-RS-ResourceSetList, BWP-Id and ResourceType;

Among them, a set of CSI-RS resource configurations may include at least one CSI-RS resource configuration.

Step S402: The network device sends the first indication information to the terminal device.

In some embodiments, the first indication information may be carried in an RRC message, for example, the first indication information may be carried in an RRC Release message. During the RRC connection release process, the network device may send the first indication information through the RRC Release message.

In some embodiments, the first indication information includes at least one serving cell index and a set of second CSI-RS resource indexes corresponding to the serving cell index; that is, the first indication information provides a set of {cell index, CSI-ResourceConfig}. The second CSI-RS resource index includes: a set of second CSI-ResourceConfigID; the set of second CSI-RS resource index includes at least one second CSI-ResourceConfigID.

In some embodiments, if the first indication information indicates the CSI-RS resource of the serving cell that the terminal device can use, the second CSI-RS resource index corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell, That is, the second CSI-ResourceConfig corresponding to the second CSI-RS resource index is configured in the csi-MeasConfig of the serving cell.

In some embodiments, if the first indication information indicates that the terminal device can use the CSI-RS resource of the serving cell, the second CSIResourceConfig corresponding to the second CSI-RS resource index belongs to the CSI measurement of the initial BWP of the serving cell Configuration, that is, the second CSI-ResourceConfig corresponding to the second CSI-RS resource index is the CSI-ResourceConfig configured on the initial BWP, and the BWP-ID of the second CSI-ResourceConfig corresponding to the second CSI-RS resource index Is 0.

Step S403: In the case that the terminal device in the idle state or the deactivated state resides in the cell in the first indication message, the terminal device corresponds to the second CSI-RS resource index before the paging opportunity arrives. The second CSI-RS resource configuration for downlink synchronization is performed.

In some embodiments, the cell in the first indication message may be a cell corresponding to the cell index in the first indication message.

For the scenario where the network device indicates that the terminal device can use the CSI-RS resource of the serving cell in the form of {cell index, CSI-ResourceConfigID}, another optional schematic diagram for the terminal device to perform downlink synchronization is shown in FIG. 6. After the terminal device enters the idle state or the deactivated state, if the terminal device resides on the cell corresponding to the cell index, the terminal device according to the CSI-ResourceConfig corresponding to a group of CSI-ResourceConfigId corresponding to the cell index indicated in the first indication information Information, the downlink synchronization of the cell is performed before the arrival of the PO time.

Aiming at the scenario where the network device directly indicates the CSI-RS resources of the serving cell that the terminal device can use in the form of {cell index, CSI-ResourceConfig} through the first indication information, another detail of the downlink synchronization method provided in this embodiment of the application is The processing flow diagram, as shown in Figure 7, includes:

Step S501: The network device sends first indication information to the terminal device.

In some embodiments, the first indication information may be carried in an RRC message, for example, the first indication information may be carried in an RRC Release message. During the RRC connection release process, the network device may send the first indication information through the RRC Release message.

In some embodiments, the first indication information includes at least one cell identity and a third CSI-RS resource configuration corresponding to the cell identity. Wherein, when the cell is a serving cell, at least one cell identity and a third CSI-RS resource configuration corresponding to the cell identity may be presented in the form of {cell index, CSI-ResourceConfig}.

In some embodiments, the third CSI-RS resource configuration presented in the form of {cell index, CSI-ResourceConfig} may include: at least one of cell index, CSI-ResourceConfigId, CSI-RS-ResourceSetList, BWP-Id, and ResourceType item.

Among them, the BWP-Id can be 0, or no BWP-Id is configured; the ResourceType can be periodic or no ResourceType can be configured.

Step S502: In the case that the terminal device in the idle state or in the deactivated state resides in the cell in the first indication message, the terminal device performs processing based on the third CSI-RS resource configuration before the paging opportunity arrives. Downlink synchronization.

In some embodiments, the cell in the first indication message may be a cell corresponding to the cell index in the first indication message.

For the scenario where the network device indicates that the terminal device can use the CSI-RS resource of the serving cell in the form of {cell index, CSI-ResourceConfig}, another optional schematic diagram for the terminal device to perform downlink synchronization is shown in FIG. 8. After the terminal device enters the idle state or the deactivated state, if the terminal device resides on the cell corresponding to the cell index, the terminal device will use a set of CSI-ResourceConfig corresponding to the cell index indicated in the first indication information before the arrival of the PO time. Perform the downlink synchronization of the cell.

In the embodiment of the present application, the network device directly instructs the terminal device to configure the CSI-RS resource used for downlink synchronization through the first indication information.

Aiming at the scenario where the network device directly indicates the CSI-RS resources of the cell that can be used by the terminal device in the form of CSI-ResourceConfig through the first indication information, another detailed processing flow diagram of the downlink synchronization method provided in the embodiment of the present application is shown in FIG. 9 shows, including:

Step S601: The network device sends first indication information to the terminal device.

In some embodiments, the first indication information may be carried in a system message, that is, the network device broadcasts the first indication information through the system message. The first indication information includes at least one set of third CSI-RS resource configuration; the third CSI-RS resource configuration may be the CSI-RS resource configuration of the serving cell or the CSI-RS resource configuration of the neighboring cell. In the case that the third CSI-RS resource configuration is the CSI-RS resource configuration of the serving cell, the first indication information may also include the cell index of the serving cell; when the third CSI-RS resource configuration is a neighbor In the case of the CSI-RS resource configuration of the cell, the first indication information may also include the frequency and/or the physical cell identifier (PCI) of the cell.

In some embodiments, the third CSI-RS resource configuration may include at least one of cell index, CSI-ResourceConfigId, CSI-RS-ResourceSetList, BWP-Id, and ResourceType.

Among them, BWP-Id can be 0 or no BWP-Id can be configured; ResourceType can be periodic or no ResourceTyp can be configured.

Step S602, in the case that the terminal device in the idle state or in the deactivated state resides in the cell corresponding to the third CSI-RS resource configuration, the terminal device based on the third CSI-RS before the paging opportunity arrives The resource configuration is synchronized in the downlink.

For the scenario where the network device indicates the CSI-RS resources of the cell that can be used by the terminal device in the form of CSI-ResourceConfig, another optional schematic diagram of the terminal device performing downlink synchronization is shown in FIG. 10. After the terminal device enters the idle state or the deactivated state, if the terminal device resides on the cell corresponding to the CSI-ResourceConfig, the terminal device performs the downlink synchronization of the cell before the arrival of the PO time according to the CSI-ResourceConfig indicated in the first indication information .

In the downlink synchronization method described in FIGS. 3 to 10 in the embodiment of the present application, the terminal device may also receive second indication information sent by the network device, where the second indication information is used to determine that the CSI-RS resource information is used for The effective time for the unconnected terminal device to perform downlink synchronization.

In some embodiments, all CSI-RS resource configurations of the cell may correspond to one valid time; or, the CSI-RS resource configuration of each cell corresponds to one valid time. Within the valid time, the non-connected terminal device can perform downlink synchronization based on the CSI-RS resource information; outside the valid period, the non-connected terminal device cannot be based on the The CSI-RS resource information performs downlink synchronization, and the non-connected terminal device may perform downlink synchronization based on the SSB resource. The schematic diagram of the downlink synchronization method based on the effective time in the embodiment of this application. As shown in FIG. 11, the network device indicates a set of CSI-RS resources for multiple cells through the RRC release message. Within the effective time of the CSI-RS resources, the terminal When the device resides on cell1, the terminal device performs downlink synchronization based on the CSI-RS resource on cell1 before the paging opportunity arrives. Outside the valid time of the CSI-RS resource, in the case that the terminal device resides on cell1, the terminal device performs downlink synchronization based on the SSB resource on cell1 before the paging opportunity arrives.

In the downlink synchronization method provided by the embodiment of the application, the network device indicates to the terminal device the CSI-RS resources that can be used for downlink synchronization of the terminal device in the idle state or in the deactivated state through dedicated signaling (RRC message) or system message, and the terminal device is searching CSI-RS resources can be used for downlink synchronization before the call time arrives. Since the time domain period of the CSI-RS resource is short, the time for the terminal device to complete downlink synchronization based on the CSI-RS resource can be shorter than the time interval at which the paging occasion starts, which can effectively save the power consumption of the terminal device.

Another optional processing flow of the downlink synchronization method provided by the embodiment of the present application, as shown in FIG. 12, includes the following steps:

Step S801: The network device sends first indication information; the first indication information is used for the terminal device to determine CSI-RS resource information, and the CSI-RS resource information is used for the unconnected terminal device to perform downlink synchronization.

In some embodiments, the network device sends the first indication information to the terminal device.

In some embodiments, the related description of the first indication information is the same as the related description of the first indication information in the above step S201, step S302, step S402, step S501, and step S601, and will not be repeated here. .

In some embodiments, the downlink synchronization method may further include:

Step S802: The network device sends second indication information, where the second indication information is used to determine the effective time for the CSI-RS resource information to be used by the non-connected terminal device to perform downlink synchronization.

In some embodiments, the network device sends the second instruction information to the terminal device. The related description of the second instruction information is the same as the related description of the second instruction information in step S202, and will not be omitted here. Go into details.

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

In order to implement the aforementioned downlink synchronization method, an embodiment of the present application provides a terminal device. An optional structural schematic diagram of the terminal device 900, as shown in FIG. 13, includes:

The receiving unit 901 is configured to receive first indication information; the first indication information is used to determine CSI-RS resource information, and the CSI-RS resource information is used for a non-connected terminal device to perform downlink synchronization.

In some embodiments, the terminal device 900 further includes:

The processing unit 902 is configured to perform downlink synchronization based on the CSI-RS resource information before the non-connected terminal device arrives at the paging opportunity

In some embodiments, the first indication information includes: a first CSI-RS resource index.

In some embodiments, the first CSI-RS resource index includes: a set of first CSI-ResourceConfigIDs.

In some embodiments, the set of first CSI-ResourceConfigID includes at least one first CSI-ResourceConfigID.

In some embodiments, the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.

In some embodiments, the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.

In some embodiments, the processing unit 902 is configured to, if the non-connected terminal device resides in the primary cell, based on the first CSI-RS corresponding to the first CSI-RS resource index before the paging opportunity arrives The resource configuration is synchronized in the downlink.

In some embodiments, the first indication information includes: at least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.

In some embodiments, the second CSI-RS resource index includes: a set of second CSI-ResourceConfigIDs.

In some embodiments, the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.

In some embodiments, the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.

In some embodiments, the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the serving cell corresponding to the serving cell index.

In some embodiments, the processing unit 902 is configured to, if the non-connected terminal device resides in the cell corresponding to the serving cell index, based on the second corresponding to the serving cell index before the paging opportunity arrives. The second CSI-RS resource configuration corresponding to the CSI-RS resource index performs downlink synchronization.

In some embodiments, the first indication information includes: at least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.

In some embodiments, the third CSI-RS resource configuration includes at least one of the following: a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identifier, and a first resource type.

In some embodiments, the first bandwidth part is identified as 0.

In some embodiments, the first resource type is periodic.

In some embodiments, the cell identification includes: a cell index.

In some embodiments, the first indication information is carried in an RRC message.

In some embodiments, the first indication information is carried in an RRC Release message.

In some embodiments, the cell identity includes: frequency point and/or PCI.

In some embodiments, the first indication information is carried in a system broadcast message.

In some embodiments, the processing unit 902 is configured to, if the non-connected terminal device camps on the cell corresponding to the cell identifier, based on the third CSI-corresponding to the cell identifier before the paging opportunity arrives. The RS resource configuration performs downlink synchronization.

In some embodiments, the receiving unit 901 is further configured to receive second indication information, where the second indication information is used to determine that the CSI-RS resource information is effective for the non-connected terminal device to perform downlink synchronization. time.

In some embodiments, all the CSI-RS resource configurations of the cell correspond to one valid time; or, the CSI-RS resource configuration of each cell corresponds to one valid time.

In some embodiments, within the valid time, the non-connected terminal device can perform downlink synchronization based on the CSI-RS resource information; outside the valid period, the non-connected terminal The device cannot perform downlink synchronization based on the CSI-RS resource information.

In some embodiments, the second indication information is carried in an RRC message.

In some embodiments, the non-connected state includes: a deactivated state and/or an idle state.

In order to implement the aforementioned downlink synchronization method, an embodiment of the present application provides a network device. An optional structural schematic diagram of the network device 1000, as shown in FIG. 14, includes:

The sending unit 1001 is configured to send first indication information; the first indication information is used for a terminal device to determine CSI-RS resource information, and the CSI-RS resource information is used for a non-connected terminal device to perform downlink synchronization.

In some embodiments, the first indication information includes: a first CSI-RS resource index.

In some embodiments, the first CSI-RS resource index includes: a set of first CSI-ResourceConfigIDs.

In some embodiments, the set of first CSI-ResourceConfigIDs includes at least one first CSI-ResourceConfigID.

In some embodiments, the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.

In some embodiments, the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.

In some embodiments, the first indication information includes: at least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.

In some embodiments, the second CSI-RS resource index includes: a set of second CSI-ResourceConfigIDs.

In some embodiments, the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.

In some embodiments, the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.

In some embodiments, the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the serving cell corresponding to the serving cell index.

In some embodiments, the first indication information includes: at least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.

In some embodiments, the third CSI-RS resource configuration includes at least one of the following:

The third CSI-ResourceConfigID, the third CSI-RS-ResourceSetList, the first bandwidth part identifier, and the first resource type.

In some embodiments, the first bandwidth part is identified as 0.

In some embodiments, the first resource type is periodic.

In some embodiments, the cell identification includes: a cell index.

In some embodiments, the first indication information is carried in an RRC message.

In some embodiments, the first indication information is carried in an RRC Release message.

In some embodiments, the cell identity includes: frequency point and/or PCI.

In some embodiments, the first indication information is carried in a system broadcast message.

In some embodiments, the sending unit 1001 is further configured to send second indication information, where the second indication information is used to determine that the CSI-RS resource information is valid for the non-connected terminal device to perform downlink synchronization. time.

In some embodiments, all the CSI-RS resource configurations of the cell correspond to one valid time; or, the CSI-RS resource configuration of each cell corresponds to one valid time.

In some embodiments, the second indication information is carried in an RRC message.

In some embodiments, the non-connected state includes: a deactivated state and/or an idle state.

An embodiment of the present application further provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal device when the computer program is running. Steps of the downlink synchronization method.

An embodiment of the present application also provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned network device when the computer program is running. Steps of the downlink synchronization method.

An embodiment of the present application also provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the downlink synchronization method performed by the terminal device.

An embodiment of the present application also provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the downlink synchronization method performed by the network device.

The embodiment of the present application further provides a storage medium storing an executable program, and when the executable program is executed by a processor, the above-mentioned downlink synchronization method executed by the terminal device is implemented.

The embodiment of the present application also provides a storage medium storing an executable program, and when the executable program is executed by a processor, the downlink synchronization method executed by the above-mentioned network device is implemented.

The embodiments of the present application also provide a computer program product, including computer program instructions, which cause a computer to execute the downlink synchronization method executed by the above-mentioned terminal device.

An embodiment of the present application also provides a computer program product, including computer program instructions, which cause a computer to execute the downlink synchronization method executed by the above-mentioned network device.

The embodiment of the present application also provides a computer program that enables a computer to execute the downlink synchronization method executed by the above-mentioned terminal device.

The embodiments of the present application also provide a computer program that enables a computer to execute the downlink synchronization method executed by the above-mentioned network device.

FIG. 15 is a schematic diagram of the hardware composition structure of an electronic device (terminal device or network device) according to an embodiment of the present application. The electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together through the bus system 705. It can be understood that the bus system 705 is used to implement connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear description, various buses are marked as the bus system 705 in FIG. 15.

It can be understood that the memory 702 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory. Among them, non-volatile memory can be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage. The volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), and dynamic random access memory. Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), enhanced Type synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronous connection dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, Direct Rambus Random Access Memory) ). The memory 702 described in the embodiment of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the electronic device 700. Examples of such data include: any computer program used to operate on the electronic device 700, such as the application program 7022. The program for implementing the method of the embodiment of the present application may be included in the application program 7022.

The method disclosed in the foregoing embodiment of the present application may be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software. The aforementioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The processor 701 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor or the like. Combining the steps of the method disclosed in the embodiments of the present application, it may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the electronic device 700 may be used by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.

This application is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

It should be understood that the terms "system" and "network" in this application are often used interchangeably herein. The term "and/or" in this application is merely an association relationship describing associated objects, which means that there can be three types of relationships. For example, A and/or B can mean that there is A alone, and both A and B exist. There are three cases of B. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

The above are only the preferred embodiments of this application and are not used to limit the scope of protection of this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in Within the scope of protection of this application.

Claims (116)

1. A downlink synchronization method, the method includes:

   The terminal device receives the first indication information; the first indication information is used to determine the channel state indication reference signal CSI-RS resource information, and the CSI-RS resource information is used for the unconnected terminal device to perform downlink synchronization.
2. The method according to claim 1, wherein the method further comprises:

   The non-connected terminal device performs downlink synchronization based on the CSI-RS resource information before the paging opportunity arrives.
3. The method according to claim 1 or 2, wherein the first indication information comprises:

   The first CSI-RS resource index.
4. The method according to claim 3, wherein the first CSI-RS resource index comprises:

   A group of first channel state indication resource configuration identifiers CSI-ResourceConfigID.
5. The method of claim 4, wherein the set of first CSI-ResourceConfigIDs includes at least one first CSI-ResourceConfigID.
6. The method according to any one of claims 3 to 5, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.
7. The method according to any one of claims 3 to 6, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.
8. The method according to any one of claims 3 to 7, wherein if the terminal device in the non-connected state resides in the primary cell, the terminal device based on the first CSI- before the paging opportunity arrives. The first CSI-RS resource configuration corresponding to the RS resource index performs downlink synchronization.
9. The method according to claim 1 or 2, wherein the first indication information comprises:

   At least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.
10. The method according to claim 9, wherein the second CSI-RS resource index comprises:

    A set of second CSI-ResourceConfigID.
11. The method of claim 10, wherein the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.
12. The method according to any one of claims 9 to 11, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.
13. The method according to any one of claims 9 to 12, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI of the initial bandwidth part of the serving cell corresponding to the serving cell index Measurement configuration.
14. The method according to any one of claims 9 to 13, wherein if the terminal device in the non-connected state resides in the cell corresponding to the serving cell index, the terminal device is based on and before the paging opportunity arrives. The second CSI-RS resource configuration corresponding to the second CSI-RS resource index corresponding to the serving cell index performs downlink synchronization.
15. The method according to claim 1 or 2, wherein the first indication information comprises:

    At least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.
16. The method according to claim 15, wherein the third CSI-RS resource configuration includes at least one of the following:

    The third CSI-ResourceConfigID, the third CSI-RS-ResourceSetList, the first bandwidth part identifier, and the first resource type.
17. The method according to claim 16, wherein the first bandwidth part is identified as zero.
18. The method according to claim 16 or 17, wherein the first resource type is periodic.
19. The method according to any one of claims 15 to 18, wherein the cell identification comprises: a cell index.
20. The method according to any one of claims 1 to 19, wherein the first indication information is carried in a radio resource control RRC message.
21. The method according to any one of claims 1 to 20, wherein the first indication information is carried in a radio resource control release RRC Release message.
22. The method according to any one of claims 15 to 18, wherein the cell identity comprises: frequency point and/or physical cell identity PCI.
23. The method according to any one of claims 1, 2, 15 to 18, and 22, wherein the first indication information is carried in a system broadcast message.
24. The method according to any one of claims 15 to 19, 22, and 23, wherein if the terminal device in the non-connected state resides in the cell corresponding to the cell identifier, the terminal device arrives at the paging occasion Previously, downlink synchronization was performed based on the third CSI-RS resource configuration corresponding to the cell identity.
25. The method according to any one of claims 1 to 24, wherein the method further comprises:

    The terminal device receives second indication information, where the second indication information is used to determine the effective time for the CSI-RS resource information to be used by the terminal device in a disconnected state to perform downlink synchronization.
26. The method according to claim 25, wherein all CSI-RS resource configurations of the cell correspond to a valid time;

    Or, the CSI-RS resource configuration of each cell corresponds to a valid time.
27. The method according to claim 25 or 26, wherein, within the valid time, the non-connected terminal device can perform downlink synchronization based on the CSI-RS resource information;

    Except for the effective interval, the terminal device in the non-connected state cannot perform downlink synchronization based on the CSI-RS resource information.
28. The method according to any one of claims 25 to 27, wherein the second indication information is carried in an RRC message.
29. The method according to any one of claims 1 to 28, wherein the unconnected state comprises:

    Deactivated state and/or idle state.
30. A downlink synchronization method, the method includes:

    The network device sends first indication information; the first indication information is used by the terminal device to determine the channel state indication reference signal CSI-RS resource information, and the CSI-RS resource information is used for the terminal device in the unconnected state to perform downlink synchronization.
31. The method according to claim 30, wherein the first indication information comprises:

    The first CSI-RS resource index.
32. The method according to claim 31, wherein the first CSI-RS resource index comprises:

    A group of first channel state indication resource configuration identifiers CSI-ResourceConfigID.
33. The method of claim 32, wherein the set of first CSI-ResourceConfigIDs includes at least one first CSI-ResourceConfigID.
34. The method according to any one of claims 31 to 33, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.
35. The method according to any one of claims 31 to 34, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.
36. The method according to claim 30, wherein the first indication information comprises:

    At least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.
37. The method of claim 36, wherein the second CSI-RS resource index comprises:

    A set of second channel state indication resource configuration identifiers CSI-ResourceConfigID.
38. The method of claim 37, wherein the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.
39. The method according to any one of claims 36 to 38, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.
40. The method according to any one of claims 36 to 39, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI of the initial bandwidth part of the serving cell corresponding to the serving cell index Measurement configuration.
41. The method according to claim 30, wherein the first indication information comprises:

    At least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.
42. The method according to claim 41, wherein the third CSI-RS resource configuration includes at least one of the following:

    The third CSI-ResourceConfigID, the third CSI-RS-ResourceSetList, the first bandwidth part identifier, and the first resource type.
43. The method according to claim 42, wherein the first bandwidth part is identified as zero.
44. The method according to claim 42 or 43, wherein the first resource type is periodic.
45. The method according to any one of claims 41 to 44, wherein the cell identification comprises: a cell index.
46. The method according to any one of claims 30 to 45, wherein the first indication information is carried in a radio resource control RRC message.
47. The method according to any one of claims 30 to 46, wherein the first indication information is carried in a radio resource control release RRC Release message.
48. The method according to any one of claims 41 to 44, wherein the cell identity comprises: frequency point and/or physical cell identity PCI.
49. The method according to any one of claims 30, 41 to 44, and 48, wherein the first indication information is carried in a system broadcast message.
50. The method according to any one of claims 30 to 49, wherein the method further comprises:

    The network device sends second indication information, where the second indication information is used to determine the effective time for the CSI-RS resource information to be used by the terminal device in a disconnected state to perform downlink synchronization.
51. The method according to claim 50, wherein all CSI-RS resource configurations of the cell correspond to a valid time;

    Or, the CSI-RS resource configuration of each cell corresponds to a valid time.
52. The method according to claim 50 or 51, wherein the second indication information is carried in an RRC message.
53. The method according to any one of claims 30 to 52, wherein the non-connected state comprises:

    Deactivated state and/or idle state.
54. A terminal device, the terminal device includes:

    The receiving unit is configured to receive first indication information; the first indication information is used to determine channel state indication reference signal CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of a non-connected terminal device.
55. The terminal device according to claim 54, wherein the terminal device further comprises:

    The processing unit is configured to perform downlink synchronization based on the CSI-RS resource information before the non-connected terminal device arrives at the paging occasion.
56. The terminal device according to claim 54 or 55, wherein the first indication information comprises:

    The first CSI-RS resource index.
57. The terminal device according to claim 56, wherein the first CSI-RS resource index comprises:

    A group of first channel state indication resource configuration identifiers CSI-ResourceConfigID.
58. The terminal device according to claim 57, wherein the set of first CSI-ResourceConfigIDs includes at least one first CSI-ResourceConfigID.
59. The terminal device according to any one of claims 56 to 58, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.
60. The terminal device according to any one of claims 56 to 59, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.
61. The terminal device according to any one of claims 56 to 60, wherein the processing unit is configured to, if the non-connected terminal device resides in the primary cell, based on the first CSI- before the paging opportunity arrives. The first CSI-RS resource configuration corresponding to the RS resource index performs downlink synchronization.
62. The terminal device according to claim 54 or 55, wherein the first indication information comprises:

    At least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.
63. The terminal device according to claim 62, wherein the second CSI-RS resource index comprises:

    A set of second CSI-ResourceConfigID.
64. The terminal device according to claim 63, wherein the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.
65. The terminal device according to any one of claims 62 to 64, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.
66. The terminal device according to any one of claims 62 to 65, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the initial bandwidth part of the serving cell corresponding to the serving cell index CSI measurement configuration.
67. The terminal device according to any one of claims 62 to 66, wherein the processing unit is configured to, if the non-connected terminal device resides in the cell corresponding to the serving cell index, based on the The second CSI-RS resource configuration corresponding to the second CSI-RS resource index corresponding to the serving cell index performs downlink synchronization.
68. The terminal device according to claim 54 or 55, wherein the first indication information comprises:

    At least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.
69. The terminal device according to claim 68, wherein the third CSI-RS resource configuration includes at least one of the following:

    The third CSI-ResourceConfigID, the third CSI-RS-ResourceSetList, the first bandwidth part identifier, and the first resource type.
70. The terminal device according to claim 69, wherein the first bandwidth part is identified as 0.
71. The terminal device according to claim 69 or 70, wherein the first resource type is periodic.
72. The terminal device according to any one of claims 68 to 71, wherein the cell identifier comprises: a cell index.
73. The terminal device according to any one of claims 54 to 72, wherein the first indication information is carried in a radio resource control RRC message.
74. The terminal device according to any one of claims 54 to 73, wherein the first indication information is carried in a radio resource control release RRC Release message.
75. The terminal device according to any one of claims 68 to 71, wherein the cell identity comprises: frequency point and/or physical cell identity PCI.
76. The terminal device according to any one of claims 54, 55, 68 to 71 and 75, wherein the first indication information is carried in a system broadcast message.
77. The terminal device according to any one of claims 68 to 72, 75, and 76, wherein the processing unit is configured to, if the terminal device in a non-connected state resides in a cell corresponding to the cell identifier, at a paging occasion Before arrival, perform downlink synchronization based on the third CSI-RS resource configuration corresponding to the cell identity.
78. The terminal device according to any one of claims 54 to 77, wherein the receiving unit is further configured to receive second indication information, and the second indication information is used to determine that the CSI-RS resource information is used for non- The effective time for a connected terminal device to perform downlink synchronization.
79. The terminal device according to claim 78, wherein all CSI-RS resource configurations of the cell correspond to a valid time;

    Or, the CSI-RS resource configuration of each cell corresponds to a valid time.
80. The terminal device according to claim 78 or 79, wherein, within the valid time, the non-connected terminal device can perform downlink synchronization based on the CSI-RS resource information;

    Except for the effective interval, the terminal device in the non-connected state cannot perform downlink synchronization based on the CSI-RS resource information.
81. The terminal device according to any one of claims 78 to 80, wherein the second indication information is carried in an RRC message.
82. The terminal device according to any one of claims 54 to 81, wherein the non-connected state comprises:

    Deactivated state and/or idle state.
83. A network device, the network device includes:

    The sending unit is configured to send first indication information; the first indication information is used for the terminal equipment to determine channel state indication reference signal CSI-RS resource information, and the CSI-RS resource information is used for the terminal equipment in the unconnected state to perform downlink Synchronize.
84. The network device according to claim 83, wherein the first indication information comprises:

    The first CSI-RS resource index.
85. The network device according to claim 84, wherein the first CSI-RS resource index comprises:

    A group of first channel state indication resource configuration identifiers CSI-ResourceConfigID.
86. The network device of claim 85, wherein the set of first CSI-ResourceConfigIDs includes at least one first CSI-ResourceConfigID.
87. The network device according to any one of claims 84 to 86, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the primary cell.
88. The network device according to any one of claims 84 to 87, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to the CSI measurement configuration of the initial bandwidth part of the primary cell.
89. The network device according to claim 83, wherein the first indication information comprises:

    At least one serving cell index, and a set of second CSI-RS resource indexes corresponding to the serving cell index.
90. The network device according to claim 89, wherein the second CSI-RS resource index comprises:

    A set of second CSI-ResourceConfigID.
91. The network device according to claim 90, wherein the set of second CSI-RS resource indexes includes at least one second CSI-ResourceConfigID.
92. The network device according to any one of claims 89 to 91, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the CSI measurement configuration of the serving cell corresponding to the serving cell index.
93. The network device according to any one of claims 89 to 92, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to the initial bandwidth part of the serving cell corresponding to the serving cell index CSI measurement configuration.
94. The network device according to claim 83, wherein the first indication information comprises:

    At least one cell identifier, and a third CSI-RS resource configuration corresponding to the cell identifier.
95. The network device according to claim 94, wherein the third CSI-RS resource configuration includes at least one of the following:

    The third CSI-ResourceConfigID, the third CSI-RS-ResourceSetList, the first bandwidth part identifier, and the first resource type.
96. The network device according to claim 95, wherein the first bandwidth part is identified as 0.
97. The network device according to claim 95 or 96, wherein the first resource type is periodic.
98. The network device according to any one of claims 94 to 97, wherein the cell identifier comprises: a cell index.
99. The network device according to any one of claims 83 to 98, wherein the first indication information is carried in a radio resource control RRC message.
100. The network device according to any one of claims 83 to 99, wherein the first indication information is carried in an RRC Release message.
101. The network device according to any one of claims 94 to 97, wherein the cell identity comprises: frequency point and/or physical cell identity PCI.
102. The network device according to any one of claims 83, 94 to 97, and 101, wherein the first indication information is carried in a system broadcast message.
103. The network device according to any one of claims 83 to 102, wherein the sending unit is further configured to send second indication information, and the second indication information is used to determine that the CSI-RS resource information is used for non- The effective time for a connected terminal device to perform downlink synchronization.
104. The network device according to claim 103, wherein all CSI-RS resource configurations of the cell correspond to a valid time;

     Or, the CSI-RS resource configuration of each cell corresponds to a valid time.
105. The network device according to claim 103 or 104, wherein the second indication information is carried in an RRC message.
106. The network device according to any one of claims 83 to 105, wherein the non-connected state comprises:

     Deactivated state and/or idle state.
107. A terminal device including a processor and a memory for storing a computer program that can run on the processor, wherein:

     When the processor is used to run the computer program, it executes the steps of the downlink synchronization method according to any one of claims 1 to 29.
108. A network device including a processor and a memory for storing a computer program that can run on the processor, wherein:

     When the processor is used to run the computer program, it executes the steps of the downlink synchronization method according to any one of claims 30 to 53.
109. A storage medium storing an executable program, and when the executable program is executed by a processor, the downlink synchronization method according to any one of claims 1 to 29 is implemented.
110. A storage medium storing an executable program, and when the executable program is executed by a processor, the downlink synchronization method according to any one of claims 30 to 53 is implemented.
111. A computer program product, comprising computer program instructions that cause a computer to execute the downlink synchronization method according to any one of claims 1 to 29.
112. A computer program product, comprising computer program instructions that cause a computer to execute the downlink synchronization method according to any one of claims 30 to 53.
113. A computer program that enables a computer to execute the downlink synchronization method according to any one of claims 1 to 29.
114. A computer program that enables a computer to execute the downlink synchronization method according to any one of claims 30 to 53.
115. A chip comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the downlink synchronization method according to any one of claims 1 to 29.
116. A chip comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the downlink synchronization method according to any one of claims 30 to 53.

Images