CN115244999A

CN115244999A - Downlink synchronization method, electronic device and storage medium

Info

Publication number: CN115244999A
Application number: CN202080098348.2A
Authority: CN
Inventors: 李海涛; 胡奕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2022-10-25
Also published as: WO2021203239A1

Abstract

The application discloses a downlink synchronization method, which comprises the following steps: the terminal equipment receives first indication information; the first indication information is used for determining channel state indication reference signal resource information, and the channel state indication reference signal resource information is used for downlink synchronization of the non-connection-state terminal equipment. The application also discloses another downlink synchronization method, electronic equipment and a storage medium.

Description

Downlink synchronization method, electronic device and storage medium

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a downlink synchronization method, an electronic device, and a storage medium.

Background

In the related art, how to effectively save power consumption of a terminal device (User Equipment, UE) in a downlink synchronization process has not been clarified yet.

Disclosure of Invention

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

In a first aspect, an embodiment of the present application provides a downlink synchronization method, including: the terminal equipment receives first indication information; the first indication information is used for determining Channel state Indicator Reference Signal (CSI-RS) resource information, and the CSI-RS resource information is used for downlink synchronization of a non-connected terminal device.

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

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

In a fourth aspect, an embodiment of the present application provides a network device, where the network device includes: a transmitting unit configured to transmit first indication information; the first indication information is used for the terminal equipment to determine CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of the non-connection state terminal equipment.

In a fifth aspect, an embodiment of the present application provides a terminal device, including a processor and a memory, where the memory is used for storing a computer program that can be executed on the processor, and when the processor is used for executing the computer program, the processor is configured to execute steps of a downlink synchronization method executed by the terminal device.

In a sixth aspect, an embodiment of the present application provides a network device, including a processor and a memory, where the memory is used for storing a computer program that can be executed on the processor, and the processor is configured to execute the steps of the downlink synchronization method executed by the network device when the processor executes the computer program.

In a seventh aspect, an embodiment of the present application provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the downlink synchronization method executed by the terminal equipment.

In an eighth aspect, an embodiment of the present application provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the downlink synchronization method executed by the network equipment.

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

In a tenth aspect, an embodiment of the present application provides a storage medium, which stores an executable program, and when the executable program is executed by a processor, the 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, which includes computer program instructions, and the computer program instructions enable a computer to execute the downlink synchronization method executed by the terminal device.

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

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

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

The downlink synchronization method, the electronic device and the storage medium provided by the embodiment of the application include: the terminal equipment receives first indication information; the first indication information is used for determining CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of the non-connection state terminal equipment. Therefore, the terminal equipment can use the CSI-RS resource to carry out downlink synchronization before the paging time arrives; because the time domain period of the CSI-RS resource is shorter, the time for the terminal equipment to complete downlink synchronization based on the CSI-RS resource can be shorter than the time interval for starting the paging occasion, and the power consumption of the terminal equipment can be effectively saved.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of an optional processing flow of a downlink synchronization method according to an embodiment of the present application;

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

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

fig. 5 is a schematic diagram of another detailed optional processing flow of the downlink synchronization method according to the embodiment of the present application;

fig. 6 is another alternative schematic diagram of performing downlink synchronization by a terminal device according to the embodiment of the present application;

fig. 7 is a schematic diagram illustrating another detailed optional processing flow of the downlink synchronization method according to the embodiment of the present application;

fig. 8 is another alternative schematic diagram of performing downlink synchronization by a terminal device according to the embodiment of the present application;

fig. 9 is a schematic diagram of a detailed optional processing flow of a downlink synchronization method according to an embodiment of the present application;

fig. 10 is a schematic diagram of another alternative for performing downlink synchronization by a terminal device according to an embodiment of the present application;

fig. 11 is a schematic processing flow diagram of a downlink synchronization method based on effective time according to an embodiment of the present application;

fig. 12 is a schematic view of another alternative processing flow of a downlink synchronization method according to an embodiment of the present application;

fig. 13 is a schematic diagram of an alternative composition structure of a terminal device according to an embodiment of the present application;

fig. 14 is a schematic diagram of an alternative configuration of a network device according to an embodiment of the present application;

fig. 15 is a schematic diagram of a hardware component structure of an electronic device according to an embodiment of the present application.

Detailed Description

So that the manner in which the features and elements of the present embodiments can be understood in detail, a more particular description of the embodiments, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.

Before the embodiments of the present application are explained, the related contents will be briefly explained.

Currently, with the pursuit of speed, delay, high-speed mobility, energy efficiency, and 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: enhanced Mobile Ultra wide band (eMBB), low Latency high reliability Communications (URLLC), and Massive Machine Type Communications (mMTC).

A New Radio (NR) system may also be deployed independently, and a New Radio Resource Control (RRC) state, that is, a deactivation (RRC-Inactive) state is defined in order to reduce air interface signaling, recover Radio connection quickly, and recover data service quickly. In an Idle (RRC-Idle) state, mobility is cell reselection based on a terminal device, a paging process is initiated by a Core Network (CN), and a paging area is configured by the CN. The network equipment side has no terminal equipment context and no RRC connection. In the RRC-Inactive state, mobility is cell reselection based on the terminal device, there is a connection between CN-NRs, a terminal device context exists on a certain network device, a paging process is triggered by RAN, a paging area based on RAN is managed by RAN, and the network device can know that the location of the terminal device is based on the paging area level of RAN.

The Paging (Paging) mechanism in the NR system is explained below.

The main function of Paging is that when the terminal device is in a Radio Resource Control (RRC) IDLE state (IDLE) or an RRC deactivated state (INACTIVE), the network device can page the terminal device through a Paging message (Paging message), or notify the terminal device of system message change or tsunami/public warning information through a short message (short message). Of course, paging also applies to terminal devices in RRC connected state, i.e., paging applies to all terminal devices in RRC state.

The contents of Paging may include a PDCCH scrambled by a Paging Radio Network Temporary Identifier (P-RNTI), and a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH. The Paging message may be transmitted in the PDSCH; the size of the short message is 8 bits (bit), and the short message may be in the PDCCH.

For the terminal device in the RRC _ IDLE state or the RRC _ INACTIVE state, since there is no data communication between the terminal device and the network device, in order to save power of the terminal device, the terminal device may monitor the Paging channel discontinuously, that is, a Paging Discontinuous Reception (DRX) mechanism is adopted. Under the Paging DRX mechanism, the terminal device only needs to listen to Paging during one Paging Occasion (PO) within each DRX cycle (cycle). The PO includes multiple PDCCH monitoring occasions, while the PO may consist of multiple time slots. A Paging Frame (PF) refers to a radio Frame, the duration of a FP is 10ms, and a PF may contain a plurality of POs or the start positions of a plurality of POs.

The DRX period is determined by a common period in system broadcast sent by network equipment and an exclusive period configured in high-level signaling, and the terminal equipment can select the minimum period of the common period and the exclusive period as the DRX period; the higher layer signaling may be Non-Access Stratum (NAS) signaling. From the perspective of the network device, there may be multiple POs for one DRX cycle, and the location where the terminal device listens for the POs is related to the Identity (ID) of the terminal device. Specifically, the PF and PO of a terminal device in one DRX cycle are determined as follows (TS 38.304):

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

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

the number Index _ (i _ s) where a PO is located within one PF is determined by the following equation:

i_s＝floor(UE_ID/N)mod Ns (2)

wherein, T is the DRX cycle of the terminal device receiving Paging. The network device broadcasts 1 default DRX cycle; and if the network equipment configures the terminal equipment with the special DRX period of the terminal equipment through the RRC signaling/high-level signaling, taking the minimum one of the DRX period broadcasted by the network equipment and the special DRX period of the terminal equipment configured by the RRC signaling/high-level signaling as the DRX period of the terminal equipment. And if the network equipment does not configure the terminal equipment with the special DRX period of the terminal equipment through RRC signaling/high-level signaling, taking the DRX period broadcasted by the network equipment as the DRX period of the UE. N is the number of PFs contained in one DRX period. Ns is the number of POs contained in one PF. PF-offset is the time domain offset used to determine the PF. The UE _ ID is 5G-S-TMSI mod 1024.

The NR system supports a network device to configure a Synchronization Signal Block (SSB) measurement and a Channel state Indicator Reference Signal (CSI-RS) measurement for a connected terminal device. Specifically, the measurement configuration is embodied in that, for SSB measurement, the network device configures an SSB frequency point associated with a measurement object for the terminal device; since the NR system supports transmission of a plurality of different subcarrier spacings, it is necessary to indicate the SSB subcarrier spacing with which the measurement is related in the measurement object. For CSI-RS measurement, reference frequency points for mapping the CSI-RS to physical resources are configured in a measurement object. For measurement configuration of the SSB reference signal, time window information indicating SSB measurement, that is, SSB Measurement Timing Configuration (SMTC) information, is additionally included in the measurement object. Further, the network device may also instruct the terminal device as to which SSB to measure (e.g., SSB-to-measure) in the SMTC. For the measurement configuration of the CSI-RS reference signals, the measurement object comprises the configuration of CSI-RS resources.

Aiming at CSI measurement and report, the 5G system supports the network equipment to configure CSI measurement and report for the terminal equipment in a connection state, and is used for the network equipment to perform data scheduling and transmission more accurately. Unlike RRM, which measures for multiple cells over the entire frequency point, CSI measurement only measures the serving cell. The network device may configure a set of CSI measurement configurations (CSI-MeasConfig) for each serving cell, the set of CSI-MeasConfig including a plurality of sets of CSI resource configurations (CSI-resourceconconfig), indicating CSI-RS resources used for CSI measurement, and an associated BandWidth Part (BandWidth Part, BWP); wherein, CSI-ResourceConfig is as follows.

The NR system supports only SSB measurement of terminal devices in idle and deactivated states, and the terminal device performs cell reselection or cell selection based on the SSB measurement. The SSB measurement is implemented by configuring an SSB Measurement Timing Configuration (SMTC) on a corresponding frequency point.

For the terminal device in the idle state or the deactivated state, the Paging channel may be monitored discontinuously, that is, a Paging Discontinuous Reception (DRX) mechanism is adopted. Under the Paging DRX mechanism, the terminal equipment only needs to monitor the PDCCH scrambled by the P-RNTI when a Paging Occasion (PO) in each DRX period (cycle) arrives; and the terminal equipment does not monitor the PDCCH scrambled by the P-RNTI at other time and closes the receiver so as to achieve the aim of saving power. After the terminal device turns off the receiver, it cannot maintain the downlink synchronization with the serving cell. Currently, downlink synchronization of terminal equipment in an idle state or a deactivated state is performed based on an SSB signal; the applicant finds that a long period of the SSB signal will result in a large gap between the SSB signal and the PO when performing downlink synchronization, so that the terminal device cannot completely turn off the receiver in the time between the time after performing downlink synchronization based on the SSB signal and the time when the PO arrives; the inability to completely shut down the receiver for this longer period of time increases the power consumption of the terminal device.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, an advanced long term evolution (advanced long term evolution, LTE-a) system, a new radio (near radio), NR) system, an evolution system of the NR system, an LTE (LTE-based access to unlicensed spectrum, LTE-U) system on an unlicensed frequency band, an NR (NR-based access to unlicensed spectrum, NR-U) system on an unlicensed frequency band, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a Wireless Local Area Network (WLAN), a wireless fidelity (WiFi), a next-generation communication system, or other communication systems.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The network device related in this embodiment may be a common base station (e.g., a NodeB or an eNB or a gNB), a new radio controller (NR controller), a centralized network element (centralized unit), a new radio base station, a radio remote module, a micro base station, a relay (relay), a distributed network element (distributed unit), a reception point (TRP), a Transmission Point (TP), or any other device. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. For convenience of description, in all embodiments of the present application, the above-mentioned apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.

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, the terminal device may also be referred to as user equipment UE, a Mobile Station (MS), a mobile terminal (mobile terminal), a terminal (terminal), etc., and the terminal device may communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal device may be a mobile phone (or called "cellular" phone), a computer with a mobile terminal, etc., and for example, the terminal device may also be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, which exchanges language and/or data with the RAN. The embodiments of the present application are not particularly limited.

Optionally, the network device and the terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellite vehicles. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

Optionally, the network device and the terminal device may communicate via a licensed spectrum (licensed spectrum), may communicate via an unlicensed spectrum (unlicensed spectrum), and may communicate via both the licensed spectrum and the unlicensed spectrum. The network device and the terminal device, and the terminal device may communicate with each other through a frequency spectrum of 7 gigahertz (GHz) or less, through a frequency spectrum of 7GHz or more, or through a frequency spectrum of 7GHz or less and through a frequency spectrum of 7GHz or more. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

Generally, conventional communication systems support a limited number of connections and are easy to implement, however, with the development of communication technology, mobile communication systems will support not only conventional communication, but also, for example, device to device (D2D) communication, machine to machine (M2M) communication, machine Type Communication (MTC), and vehicle to vehicle (V2V) communication, and the embodiments of the present application can also be applied to these communication systems.

An exemplary communication system 100 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 referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., for a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications System (PCS) terminals that may combine a cellular radiotelephone with data processing, facsimile and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

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

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present invention.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

As shown in fig. 2, an optional processing flow of the downlink synchronization method provided in the embodiment of the present application includes the following steps:

step S201, a terminal device receives first indication information, wherein the first indication information is used for determining CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of a non-connection state terminal device.

In some embodiments, the first indication information may be transmitted by a network device, and the first indication information may be used to indicate a CSI-RS resource of a PCell; or, the first indication information may be used to indicate CSI-RS resources of each serving cell, which may include a PCell, a PSCell, and an SCell; or, the first indication information is used to indicate CSI-RS resources of at least one cell, which may include a serving cell and a neighbor cell.

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

step S202, the terminal equipment receives second indication information, wherein the second indication information is used for determining the effective time of the CSI-RS resource information for downlink synchronization of the non-connected terminal equipment.

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

and step S203, the non-connected terminal equipment performs downlink synchronization based on the CSI-RS resource information before the paging occasion arrives.

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

Aiming at a scene that the network equipment indicates that the terminal equipment can use the CSI-RS resource of the PCell through the first indication information, the CSI-RS resource can be indicated in a form of CSI-ResourceConfigID; a detailed processing flow diagram of the downlink synchronization method provided in the embodiment of the present application, as shown in fig. 3, includes:

step S301, the connected terminal device receives the configuration of the serving cell.

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

wherein the set of CSI-RS resource configurations may include at least one CSI-RS resource configuration.

Step S302, 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, such as an RRC Release message. In the RRC connection Release procedure, the network device may send the first indication information through an RRC Release message.

In some embodiments, the first indication information comprises a first CSI-RS resource index; the first CSI-RS resource index includes a set of first CSI-ResourceConfigIDs including at least one first CSI-ResourceConfigID.

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

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

Step S303, under the condition that the terminal equipment in an idle state or a deactivated state resides in the PCell, the terminal equipment performs downlink synchronization based on the first CSI-RS resource configuration corresponding to the first CSI-RS resource index before the paging occasion is reached.

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

For a scenario that the network device indicates, in the form of { cell index, CSI-ResourceConfigID }, a CSI-RS resource of a serving cell that can be used by the terminal device 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. 5, and includes:

step S401, the connected terminal device receives the configuration of the serving cell.

Step S402, the network equipment sends first indication information to the terminal equipment.

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. In the RRC connection Release procedure, the network device may send the first indication information through an 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 indices 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 indices includes at least one second CSI-ResourceConfigID.

In some embodiments, if the first indication information indicates CSI-RS resources of a serving cell that can be used by the terminal device, a second CSI _ iresourceconfig corresponding to the second CSI-RS resource index belongs to CSI measurement configuration of the serving cell, that is, the second CSI-resourceconconfig corresponding to the second CSI-RS resource index is configured in CSI-MeasConfig of the serving cell.

In some embodiments, if the first indication information indicates that the terminal device may use CSI-RS resources of the serving cell, the second CSI _ iresourceconfig corresponding to the second CSI-RS resource index belongs to a CSI measurement configuration of an initial BWP of the serving cell, that is, the second CSI-resourceconconfig corresponding to the second CSI-RS resource index is a CSI-resourceconconfig configured on the initial BWP, and a BWP-ID of the second CSI-resourceconconfig corresponding to the second CSI-RS resource index is 0.

Step S403, when the terminal device in the idle state or the deactivated state resides in the cell in the first indication message, the terminal device performs downlink synchronization based on the second CSI-RS resource configuration corresponding to the second CSI-RS resource index before the paging occasion arrives.

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

Another optional schematic diagram of the terminal device performing downlink synchronization in a scenario where the network device indicates in the form of { cell index, CSI-ResourceConfigID } that the terminal device may use CSI-RS resources of the serving cell is shown in fig. 6. After the terminal equipment enters an idle state or a deactivated state, if the terminal equipment resides in a cell corresponding to the cell index, the terminal equipment performs downlink synchronization of the cell before the PO time arrives according to CSI-ResourceConfig information corresponding to a group of CSI-ResourceConfigId corresponding to the cell index indicated in the first indication information.

For a scenario that the network device directly indicates, in the form of { cell index, CSI-ResourceConfig } through the first indication information, a CSI-RS resource of a serving cell that can be used by the terminal device, a further detailed processing flow diagram of the downlink synchronization method provided in the embodiment of the present application is shown in fig. 7, and includes:

step S501, the network device sends first indication information to the terminal device.

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. Wherein, when the cell is a serving cell, the at least one cell identifier and the third CSI-RS resource configuration corresponding to the cell identifier may be presented in the form of { cell index, CSI-ResourceConfig }.

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

Wherein, BWP-Id may be 0, or BWP-Id may not be configured; the ResourceType may be periodic, or may not be configured.

Step S502, under the condition that the terminal equipment in idle state or deactivated state resides in the cell in the first indication message, the terminal equipment performs downlink synchronization based on the third CSI-RS resource configuration before the paging occasion arrives.

For a scenario in which the network device indicates, in the form of { cell index, CSI-ResourceConfig }, that the terminal device may use the CSI-RS resource of the serving cell, the terminal device performs downlink synchronization with another alternative schematic diagram, as shown in fig. 8. After the terminal device enters an idle state or a deactivated state, if the terminal device resides in a cell corresponding to the cell index, the terminal device performs downlink synchronization of the cell before the PO time arrives according to a group of CSI-ResourceConfig corresponding to the cell index indicated in the first indication information.

In the embodiment of the application, the network device directly indicates the CSI-RS resource configuration used by the terminal device for downlink synchronization through the first indication information.

As for a scenario in which the network device directly indicates, in the form of CSI-ResourceConfig, CSI-RS resources of a cell that can be used by the terminal device through the first indication information, a further detailed processing flow diagram of the downlink synchronization method provided in the embodiment of the present application is shown in fig. 9, and includes:

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 comprises at least one set of third CSI-RS resource configuration; the third CSI-RS resource configuration may be a CSI-RS resource configuration of a serving cell, or a CSI-RS resource configuration of an adjacent cell. When the third CSI-RS resource configuration is a CSI-RS resource configuration of a serving cell, the first indication information may further include a cell index of the serving cell; when the third CSI-RS resource configuration is a CSI-RS resource configuration of a neighboring Cell, the first indication information may further include a frequency point and/or a Physical Cell Identifier (PCI) of the Cell.

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

Wherein, BWP-Id may be 0, or BWP-Id may not be configured; the ResourceType may be periodic, or the ResourceType may not be configured.

Step S602, under the condition that the terminal equipment in idle state or deactivated state resides in the cell corresponding to the third CSI-RS resource configuration, the terminal equipment performs downlink synchronization based on the third CSI-RS resource configuration before the paging occasion arrives.

Another optional schematic diagram of the terminal device performing downlink synchronization in a scenario where the network device indicates, in the form of CSI-ResourceConfig, CSI-RS resources of a cell that the terminal device can use is shown in fig. 10. After the terminal equipment enters an idle state or a deactivated state, if the terminal equipment is resident on a cell corresponding to the CSI-ResourceConfig, the terminal equipment performs downlink synchronization of the cell before the PO moment arrives according to the CSI-ResourceConfig indicated in the first indication information.

In the downlink synchronization method described in fig. 3 to fig. 10 in this embodiment of the present application, the terminal device may further receive second indication information sent by the network device, where the second indication information is used to determine an effective time for the CSI-RS resource information to be used for downlink synchronization by the terminal device in the non-connected state.

In some embodiments, it may be that all CSI-RS resource configurations of a cell correspond to one validity time; or, the CSI-RS resource configuration of each cell corresponds to one valid time. In the effective time, the non-connected terminal equipment can perform downlink synchronization based on the CSI-RS resource information; outside the valid period, the non-connected terminal device cannot perform downlink synchronization based on the CSI-RS resource information, and the non-connected terminal device may perform downlink synchronization based on the SSB resource. In the schematic diagram of the downlink synchronization method based on the effective time in the embodiment of the present application, as shown in fig. 11, a network device indicates a group of CSI-RS resources for a plurality of cells through an RRC release message, and when a terminal device resides in a cell1 within the effective time of the CSI-RS resources, the terminal device performs downlink synchronization based on the CSI-RS resources in the cell1 before a paging occasion arrives. And when the terminal equipment resides in the cell1 except the effective time of the CSI-RS resource, the terminal equipment performs downlink synchronization based on the SSB resource on the cell1 before the paging occasion arrives.

In the downlink synchronization method provided in the embodiment of the present application, the network device indicates, to the terminal device, the CSI-RS resource that can be used for downlink synchronization of the terminal device in the idle state or the deactivated state through a dedicated signaling (RRC message) or a system message, and the terminal device can use the CSI-RS resource to perform downlink synchronization before a paging occasion arrives. Because the time domain period of the CSI-RS resource is shorter, the time for the terminal equipment to complete downlink synchronization based on the CSI-RS resource can be shorter than the time interval for starting the paging occasion, and the power consumption of the terminal equipment can be effectively saved.

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

step S801, the network equipment sends first indication information; the first indication information is used for determining CSI-RS resource information by the terminal equipment, and the CSI-RS resource information is used for downlink synchronization of the non-connection terminal equipment.

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

In some embodiments, the description of the first indication information is the same as the description of the first indication information in step S201, step S302, step S402, step S501, and step S601, and is not 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 effective time for the CSI-RS resource information to be used for downlink synchronization of the non-connected terminal device.

In some embodiments, the network device sends the second indication information to the terminal device, and the description of the second indication information is the same as the description of the second indication information in step S202, which is not described herein again.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

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

a receiving unit 901 configured to receive first indication information; the first indication information is used for determining CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of the non-connection state terminal equipment.

In some embodiments, the terminal device 900 further comprises:

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

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

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

In some embodiments, the set of first CSI-resourceconfigids comprises 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 a CSI measurement configuration of a primary cell.

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

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

In some embodiments, 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.

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

In some embodiments, the set of second CSI-RS resource indices 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 a CSI measurement configuration of a 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 a CSI measurement configuration of an initial bandwidth portion of a 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 a cell corresponding to the serving cell index, perform downlink synchronization based on a second CSI-RS resource configuration corresponding to a second CSI-RS resource index corresponding to the serving cell index before a paging occasion arrives.

In some embodiments, the first indication information comprises: 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 comprises at least one of: a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identification, and a first resource type.

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

In some embodiments, the first resource type is periodic.

In some embodiments, the cell identification comprises: 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 identification comprises: frequency points 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 resides in a cell corresponding to the cell identifier, perform downlink synchronization based on a third CSI-RS resource configuration corresponding to the cell identifier before a paging occasion arrives.

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

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

In some embodiments, during the valid time, the non-connected terminal device is capable of performing downlink synchronization based on the CSI-RS resource information; outside the valid period, the non-connected terminal 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 unconnected state includes: a deactivated state and/or an idle state.

In order to implement the downlink synchronization method, an embodiment of the present application provides a network device, where a schematic diagram of an optional component structure of the network device 1000 is shown in fig. 14, and the method includes:

a transmitting unit 1001 configured to transmit first indication information; the first indication information is used for the terminal equipment to determine CSI-RS resource information, and the CSI-RS resource information is used for downlink synchronization of the non-connection state terminal equipment.

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

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 portion is identified as 0.

In some embodiments, the first resource type is periodic.

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

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

The embodiment of the present application further provides a terminal device, which includes a processor and a memory for storing a computer program capable of running on the processor, where the processor is configured to execute the steps of the downlink synchronization method executed by the terminal device when running the computer program.

The embodiment of the present application further provides a network device, which includes a processor and a memory for storing a computer program capable of running on the processor, where the processor is configured to execute the steps of the downlink synchronization method executed by the network device when running the computer program.

An embodiment of the present application further provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the downlink synchronization method executed by the terminal equipment.

An embodiment of the present application further provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the downlink synchronization method executed by the network equipment.

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

The embodiment of the present application further provides a storage medium, which stores an executable program, and when the executable program is executed by a processor, the downlink synchronization method executed by the network device is implemented.

An embodiment of the present application further provides a computer program product, which includes computer program instructions, where the computer program instructions enable a computer to execute the downlink synchronization method executed by the terminal device.

An embodiment of the present application further provides a computer program product, which includes computer program instructions, where the computer program instructions enable a computer to execute the downlink synchronization method executed by the network device.

The embodiment of the present application further provides a computer program, where the computer program enables a computer to execute the downlink synchronization method executed by the terminal device.

An embodiment of the present application further provides a computer program, where the computer program enables a computer to execute the downlink synchronization method executed by the network device.

Fig. 15 is a schematic diagram of a hardware component structure of an electronic device (a terminal device or a network device) according to an embodiment of the present application, where 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 by a bus system 705. It is understood that the bus system 705 is used to enable connected communication between these components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various busses are labeled in fig. 15 as the bus system 705.

It will be appreciated that the memory 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. The non-volatile Memory may be ROM, programmable Read-Only Memory (PROM), erasable Programmable Read-Only Memory (EPROM), electrically Erasable Programmable Read-Only Memory (EEPROM), magnetic random access Memory (FRAM), flash Memory (Flash Memory), magnetic surface Memory, optical Disc, or Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), synchronous Static Random Access Memory (SSRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), synchronous Dynamic Random Access Memory (SLDRAM), direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 702 described in embodiments herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The memory 702 in the embodiments 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 for operating on electronic device 700, such as application 7022. Programs that implement methods in embodiments of the present application can be included in application program 7022.

The method disclosed in the embodiments 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 having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 702, and the processor 701 reads the information in the memory 702 and performs the steps of the method in combination with its hardware.

In an exemplary embodiment, the electronic Device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, programmable Logic Devices (PLDs), complex Programmable Logic Devices (CPLDs), FPGAs, general purpose processors, controllers, MCUs, MPUs, or other electronic components for performing the foregoing methods.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be understood that the terms "system" and "network" are often used interchangeably herein in this application. The term "and/or" in this application is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

The above description is only exemplary of the present application and should not be taken as limiting the scope of the present application, as any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

A downlink synchronization method, the method comprising:

the terminal equipment receives first indication information; the first indication information is used for determining channel state indication reference signal (CSI-RS) resource information, and the CSI-RS resource information is used for downlink synchronization of non-connection-state terminal equipment.
The method of claim 1, wherein the method further comprises:

and the non-connected terminal equipment carries out downlink synchronization based on the CSI-RS resource information before the paging occasion is reached.
The method of claim 1 or 2, wherein the first indication information comprises:

a first CSI-RS resource index.
The method of claim 3, wherein the first CSI-RS resource index comprises:

a set of first channel state indication resource configuration identities CSI-ResourceConfigID.
The method of claim 4, wherein the set of first CSI-ResourceConfigIDs comprises at least one first CSI-ResourceConfigID.
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 a CSI measurement configuration of a primary cell.
The method according to any of claims 3 to 6, wherein the first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to a CSI measurement configuration of an initial bandwidth portion of a primary cell.
The method according to any one of claims 3 to 7, wherein if the non-connected terminal device resides in a primary cell, the terminal device performs downlink synchronization based on a first CSI-RS resource configuration corresponding to the first CSI-RS resource index before a paging occasion arrives.
The method of 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.
The method of claim 9, wherein the second CSI-RS resource index comprises:

a set of second CSI-ResourceConfigIDs.
The method of claim 10, wherein the set of second CSI-RS resource indices comprises at least one second CSI-ResourceConfigID.
The method according to any of claims 9 to 11, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to a CSI measurement configuration of a serving cell corresponding to the serving cell index.
The method according to any of claims 9 to 12, wherein the second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to a CSI measurement configuration of an initial bandwidth part of a serving cell corresponding to the serving cell index.
The method according to any of claims 9 to 13, wherein if the non-connected terminal device resides in the cell corresponding to the serving cell index, the terminal device performs downlink synchronization based on a second CSI-RS resource configuration corresponding to a second CSI-RS resource index corresponding to the serving cell index before the paging occasion arrives.
The method of 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.
The method of claim 15, wherein the third CSI-RS resource configuration comprises at least one of:

a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identifier, and a first resource type.
The method of claim 16, wherein the first bandwidth portion identification is 0.
The method of claim 16 or 17, wherein the first resource type is periodic.
The method of any of claims 15 to 18, wherein the cell identity comprises: the cell index.
The method according to any of claims 1 to 19, wherein the first indication information is carried in a radio resource control, RRC, message.
The method according to any of claims 1 to 20, wherein the first indication information is carried in a radio resource control Release, RRC, release message.
The method according to any of claims 15 to 18, wherein the cell identity comprises: frequency points and/or physical cell identities, PCIs.
The method of any one of claims 1, 2, 15 to 18 and 22, wherein the first indication information is carried in a system broadcast message.
The method according to any one of claims 15 to 19, 22 and 23, wherein if the non-connected terminal device resides in the cell corresponding to the cell identifier, the terminal device performs downlink synchronization based on a third CSI-RS resource configuration corresponding to the cell identifier before a paging occasion arrives.
The method of any one of claims 1 to 24, wherein the method further comprises:

and the terminal equipment receives second indication information, wherein the second indication information is used for determining the effective time of the CSI-RS resource information for downlink synchronization of the non-connected terminal equipment.
The method of claim 25, wherein all CSI-RS resource configurations of a cell correspond to one validity time;

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

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

a deactivated state and/or an idle state.
A downlink synchronization method, the method comprising:

the network equipment sends 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 a non-connection state to perform downlink synchronization.
The method of claim 30, wherein the first indication information comprises:

a first CSI-RS resource index.
The method of claim 31, wherein the first CSI-RS resource index comprises:

a set of first channel state indication resource configuration identifications CSI-ResourceConfigID.
The method of claim 32, wherein the set of first CSI-resourceconfigids comprises at least one first CSI-ResourceConfigID.
The method of any of claims 31-33, wherein the first CSI-RS resource configuration to which the first CSI-RS resource index corresponds belongs to a CSI measurement configuration of a primary cell.
The method of any one of claims 31 to 34, wherein the first CSI-RS resource configuration to which the first CSI-RS resource index corresponds belongs to a CSI measurement configuration of an initial bandwidth portion of a primary cell.
The method of 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.
The method of claim 36, wherein the second CSI-RS resource index comprises:

a set of second channel state indication resource configuration identifications CSI-ResourceConfigID.
The method of claim 37, wherein the set of second CSI-RS resource indices comprises at least one second CSI-ResourceConfigID.
The method of any one of claims 36 to 38, wherein a second CSI-RS resource configuration corresponding to the second CSI-RS resource index belongs to a CSI measurement configuration of a serving cell corresponding to the serving cell index.
The method of any one of claims 36 to 39, wherein the second CSI-RS resource configuration for the second CSI-RS resource index belongs to a CSI measurement configuration for an initial bandwidth portion of a serving cell for the serving cell index.
The method of 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.
The method of claim 41, wherein the third CSI-RS resource configuration comprises at least one of:

a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identification, and a first resource type.
The method of claim 42, wherein the first bandwidth part identifier is 0.
The method of claim 42 or 43, wherein the first resource type is periodic.
The method of any of claims 41 to 44, wherein the cell identity comprises: a cell index.
The method of any one of claims 30 to 45, wherein the first indication information is carried in a radio resource control, RRC, message.
The method according to any of claims 30 to 46, wherein the first indication information is carried in a radio resource control Release, RRC, release message.
The method of any one of claims 41 to 44, wherein the cell identity comprises: frequency points and/or physical cell identities, PCIs.
The method of any one of claims 30, 41 to 44 and 48, wherein the first indication information is carried in a system broadcast message.
The method of any one of claims 30 to 49, wherein the method further comprises:

and the network equipment sends second indication information, wherein the second indication information is used for determining the effective time of the CSI-RS resource information for downlink synchronization of the non-connected terminal equipment.
The method of claim 50, wherein all CSI-RS resource configurations of a cell correspond to one validity time;

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

a deactivated state and/or an idle state.
A terminal device, the terminal device comprising:

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

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

a first CSI-RS resource index.
The terminal device of claim 56, wherein the first CSI-RS resource index comprises:

a set of first channel state indication resource configuration identifications CSI-ResourceConfigID.
The terminal device of claim 57, wherein the set of first CSI-ResourceConfigIDs comprises at least one first CSI-ResourceConfigID.
The terminal device of any one of claims 56 to 58, wherein the first CSI-RS resource configuration to which the first CSI-RS resource index corresponds belongs to a CSI measurement configuration of a primary cell.
The terminal device of any one of claims 56 to 59, wherein the first CSI-RS resource configuration to which the first CSI-RS resource index corresponds belongs to a CSI measurement configuration of an initial bandwidth portion of a primary cell.
The terminal device according to any of claims 56 to 60, wherein the processing unit is configured to perform downlink synchronization based on the first CSI-RS resource configuration corresponding to the first CSI-RS resource index before a paging occasion arrives if the non-connected terminal device is camped on a primary cell.
The terminal device of 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.
The terminal device of claim 62, wherein the second CSI-RS resource index includes:

a set of second CSI-ResourceConfigIDs.
The terminal device of claim 63, wherein the set of second CSI-RS resource indices includes at least one second CSI-ResourceConfigID.
The terminal device of any of claims 62 to 64, wherein the second CSI-RS resource configuration for the second CSI-RS resource index belongs to a CSI measurement configuration for a serving cell for the serving cell index.
The terminal device of any of claims 62 to 65, wherein the second CSI-RS resource configuration for the second CSI-RS resource index belongs to a CSI measurement configuration for an initial bandwidth portion of a serving cell for the serving cell index.
The terminal device according to any of claims 62 to 66, wherein the processing unit is configured to perform downlink synchronization based on a second CSI-RS resource configuration corresponding to a second CSI-RS resource index corresponding to the serving cell index before a paging occasion arrives, if the non-connected terminal device resides in a cell corresponding to the serving cell index.
The terminal device of 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.
The terminal device of claim 68, wherein the third CSI-RS resource configuration includes at least one of:

a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identification, and a first resource type.
The terminal device of claim 69, wherein the first bandwidth part identity is 0.
The terminal device of claim 69 or 70, wherein the first resource type is periodic.
The terminal device of any one of claims 68 to 71, wherein the cell identity comprises: the cell index.
The terminal device of any one of claims 54 to 72, wherein the first indication information is carried in a Radio Resource Control (RRC) message.
The terminal device of any one of claims 54 to 73, wherein the first indication information is carried in a radio resource control Release, RRC, release message.
The terminal device of any one of claims 68 to 71, wherein the cell identity comprises: frequency points and/or physical cell identities, PCIs.
The terminal device of any one of claims 54, 55, 68 to 71 and 75, wherein the first indication information is carried in a system broadcast message.
The terminal device according to any one of claims 68 to 72, 75 and 76, wherein the processing unit is configured to perform downlink synchronization based on a third CSI-RS resource configuration corresponding to the cell identifier before a paging occasion arrives, if the non-connected terminal device resides in the cell corresponding to the cell identifier.
The terminal device according to any one of claims 54 to 77, wherein the receiving unit is further configured to receive second indication information, where the second indication information is used to determine an effective time for the CSI-RS resource information to be used for downlink synchronization by the terminal device in the non-connected state.
The terminal device of claim 78, wherein all CSI-RS resource configurations for a cell correspond to one validity period;

or, the CSI-RS resource configuration of each cell corresponds to one valid time.
The terminal device of claim 78 or 79, wherein the non-connected terminal device is capable of downlink synchronization based on the CSI-RS resource information during the active time;

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

a deactivated state and/or an idle state.
A network device, the network device comprising:

a transmitting unit configured to transmit 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 a non-connection state to perform downlink synchronization.
The network device of claim 83, wherein the first indication information comprises:

a first CSI-RS resource index.
The network device of claim 84, wherein the first CSI-RS resource index includes:

a set of first channel state indication resource configuration identities CSI-ResourceConfigID.
The network device of claim 85, wherein the set of first CSI-resourceconfigids comprises at least one first CSI-ResourceConfigID.
The network device of any one of claims 84 to 86, wherein a first CSI-RS resource configuration corresponding to the first CSI-RS resource index belongs to a CSI measurement configuration of a primary cell.
The network device of any one of claims 84 to 87, wherein a first CSI-RS resource configuration to which the first CSI-RS resource index corresponds belongs to a CSI measurement configuration of an initial bandwidth portion of a primary cell.
The network device of 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.
The network device of claim 89, wherein the second CSI-RS resource index comprises:

a set of second CSI-ResourceConfigIDs.
The network device of claim 90, wherein the set of second CSI-RS resource indices comprises at least one second CSI-ResourceConfigID.
The network device of any one of claims 89 to 91, wherein the second CSI-RS resource configuration for the second CSI-RS resource index belongs to a CSI measurement configuration for a serving cell for the serving cell index.
The network device of any one of claims 89 to 92, wherein the second CSI-RS resource configuration for the second CSI-RS resource index belongs to a CSI measurement configuration for an initial bandwidth portion of a serving cell for the serving cell index.
The network device of 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.
The network device of claim 94, wherein the third CSI-RS resource configuration comprises at least one of:

a third CSI-ResourceConfigID, a third CSI-RS-ResourceSetList, a first bandwidth part identifier, and a first resource type.
The network device of claim 95, wherein the first bandwidth portion identification is 0.
The network device of claim 95 or 96, wherein the first resource type is periodic.
The network device of any one of claims 94 to 97, wherein the cell identity comprises: the cell index.
A 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.
The network device of any one of claims 83 to 99, wherein the first indication information is carried in a radio resource control Release, RRC, release message.
The network device of any one of claims 94 to 97, wherein the cell identity comprises: frequency points and/or physical cell identities, PCIs.
The network device of any one of claims 83, 94 to 97 and 101, wherein the first indication information is carried in a system broadcast message.
The network device of any one of claims 83 to 102, wherein the sending unit is further configured to send second indication information, where the second indication information is used to determine an effective time for the CSI-RS resource information to be used for downlink synchronization by a non-connected terminal device.
The network device of claim 103, wherein all CSI-RS resource configurations of a cell correspond to one validity period;

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

a deactivated state and/or an idle state.
A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is configured to execute the steps of the downlink synchronization method according to any one of claims 1 to 29 when running the computer program.
A network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is configured to execute the steps of the downlink synchronization method according to any one of claims 30 to 53 when running the computer program.
A storage medium storing an executable program which, when executed by a processor, implements the downlink synchronization method of any one of claims 1 to 29.
A storage medium storing an executable program which, when executed by a processor, implements the downlink synchronization method of any one of claims 30 to 53.
A computer program product comprising computer program instructions for causing a computer to perform the method of downlink synchronization of any one of claims 1 to 29.
A computer program product comprising computer program instructions for causing a computer to perform the method of downlink synchronization according to any one of claims 30 to 53.
A computer program for causing a computer to execute the downlink synchronization method according to any one of claims 1 to 29.
A computer program for causing a computer to execute the downlink synchronization method according to any one of claims 30 to 53.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device in which the chip is installed performs the downlink synchronization method according to any one of claims 1 to 29.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the downlink synchronization method according to any one of claims 30 to 53.