Synchronous indication method and device

Abstract

An embodiment of the present invention provides a synchronization indication method and device, the method comprising: receiving first information, the first information indicating the terminal to obtain the SSB index of the target cell according to the timing information of the serving cell. In the embodiment of the present invention, the network sends auxiliary information to indicate whether the terminal can obtain the SSB index of the target cell of different frequency or system according to the timing information of the serving cell, thereby reducing the measurement delay of the target cell and improving the mobility performance.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a synchronization indication method and device. Background Art

[0002] When the terminal reports beam quality, it needs to report the index of the synchronization signal block (SSB) corresponding to the beam quality at the same time. Therefore, the terminal needs to obtain the SSB index.

[0003] The latency of the terminal obtaining the SSB index is related to the SSB transmission period and the number of samples. Taking the 160ms SSB transmission period as an example, the latency of the terminal obtaining the SSB index is at least 480 milliseconds (ms). Considering the discontinuous reception (DRX) configuration, the number of frequencies to be tested and other information, the latency of obtaining the SSB index will be even greater. For frequencies above 6GHz, the SSB Index information can only be obtained after the physical broadcast channel (PBCH) demodulation is completed, and the latency will be further increased. Summary of the invention

[0004] An object of an embodiment of the present invention is to provide a synchronization indication method and device to solve the problem of long delay in a terminal acquiring SSBIndex.

[0005] In a first aspect, an embodiment of the present invention provides a synchronization indication method, applied to a terminal, including:

[0006] Receive first information, where the first information indicates whether the terminal obtains the synchronization signal block SSB index of the target cell based on the timing information of the serving cell.

[0007] Optionally, the receiving the first information includes:

[0008] The first information is received from the network side through broadcast information or measurement configuration.

[0009] Optionally, the first information further indicates one or more of the following:

[0010] The target cell is synchronized with the serving cell;

[0011] The target frequency is synchronized with the service frequency;

[0012] The target frequency is synchronized with the serving cell.

[0013] Optionally, the target cell is a different-frequency cell or a different-system cell.

[0014] Optionally, the first information also indicates synchronization of all cells at the target frequency point.

[0015] Optionally, the first information further indicates one or more of the following:

[0016] The target cell and the serving cell have their system frame boundaries aligned;

[0017] The frame boundaries of the target cell and the serving cell are aligned;

[0018] The time slot boundaries of the target cell and the serving cell are aligned;

[0019] The symbol boundaries of the target cell and the serving cell are aligned;

[0020] The frame boundary of the target cell is aligned with the time slot boundary of the serving cell;

[0021] The slot boundaries of the target cell are aligned with the frame boundaries of the serving cell.

[0022] Optionally, the first information further instructs the terminal to obtain the timing information of the CSI-RS resources of the target cell through the timing information of the serving cell.

[0023] In a second aspect, an embodiment of the present invention further provides a synchronization indication method, which is applied to a network device, including:

[0024] Send first information, wherein the first information indicates whether the terminal obtains the SSB index of the target cell based on the timing information of the serving cell.

[0025] Optionally, the sending the first information includes:

[0026] The first information is sent to the terminal through broadcast information or measurement configuration.

[0027] Optionally, the first information further indicates one or more of the following:

[0028] The target cell is synchronized with the serving cell;

[0029] The target frequency is synchronized with the service frequency;

[0030] The target frequency is synchronized with the serving cell.

[0031] Optionally, the target cell is a different-frequency cell or a different-system cell.

[0032] Optionally, the first information also indicates synchronization of all cells at the target frequency point.

[0033] Optionally, the first information further indicates one or more of the following:

[0034] The target cell and the serving cell have their system frame boundaries aligned;

[0035] The frame boundaries of the target cell and the serving cell are aligned;

[0036] The time slot boundaries of the target cell and the serving cell are aligned;

[0037] The symbol boundaries of the target cell and the serving cell are aligned;

[0038] The frame boundary of the target cell is aligned with the time slot boundary of the serving cell;

[0039] The slot boundaries of the target cell are aligned with the frame boundaries of the serving cell.

[0040] Optionally, the first information further instructs the terminal to obtain the timing information of the CSI-RS resources of the target cell through the timing information of the serving cell.

[0041] In a third aspect, an embodiment of the present invention further provides a terminal, comprising: a first transceiver and a first processor, wherein the first transceiver is used to: receive first information, the first information indicating whether the terminal obtains the SSB index of the target cell based on the timing information of the serving cell.

[0042] In a fourth aspect, an embodiment of the present invention further provides a terminal, including:

[0043] The receiving module is used to receive first information, where the first information indicates whether the terminal obtains the SSB index of the target cell based on the timing information of the serving cell.

[0044] In the fifth aspect, an embodiment of the present invention also provides a network device, including: a second transceiver and a second processor, wherein the second transceiver is used to: send first information, and the first information indicates whether the terminal obtains the SSB index of the target cell based on the timing information of the serving cell.

[0045] In a sixth aspect, an embodiment of the present invention further provides a network device, including:

[0046] The sending module is used to send first information, where the first information indicates whether the terminal obtains the synchronization signal block SSB index of the target cell according to the timing information of the serving cell.

[0047] In the seventh aspect, an embodiment of the present invention further provides a communication device, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the synchronization indication method as described in the first aspect or the second aspect are implemented.

[0048] In an eighth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of synchronization indication as described in the first aspect or the second aspect are implemented.

[0049] In an embodiment of the present invention, the network sends auxiliary information to indicate whether the terminal can obtain the SSB index of the target cell of different frequency or system according to the timing information of the serving cell, thereby reducing the measurement delay of the target cell and improving the mobility performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0051] Figure 1 This is a schematic diagram of the SSB time domain position;

[0052] Figure 2 A schematic diagram of the architecture of a wireless communication system according to an embodiment of the present invention;

[0053] Figure 3 One of the flowcharts of the synchronization indication method according to an embodiment of the present invention;

[0054] Figure 4 This is a second flowchart of the synchronization indication method according to an embodiment of the present invention;

[0055] Figure 5 This is a third flowchart of the synchronization indication method according to an embodiment of the present invention;

[0056] Figure 6 This is one of the schematic diagrams of the structure of a terminal according to an embodiment of the present invention;

[0057] Figure 7 The second schematic diagram of the structure of the terminal according to the embodiment of the present invention

[0058] Figure 8 This is one of the structural diagrams of the network device according to the embodiment of the present invention;

[0059] Fig. 9 This is a second structural diagram of a network device according to an embodiment of the present invention;

[0060] Fig.10 Schematic diagram of the structure of a communication device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0061] The transmission of SSB is periodic, with a certain period (Synchronization Measurement Timing Configuration (SMTC) period) and duration (SMTC duration). The SSB beam sweeping is completed within the SMTC duration, that is, the entire cell is covered. Within the SMTC duration, the symbol position occupied by each SSB index is fixed. Taking 15KHz subcarrier spacing (SCS) as an example, Figure 1 As shown in the figure, there are 2 SSB candidate positions within 1ms. The two SSB candidate positions are fixed, and their starting positions are fixed to symbol#2 and symbol#8. For frequencies below 6GHz, the maximum number of SSBs sent is 8, which takes 4ms. In these 4ms, SSB#0, 1, 2, 3, 4, 5, 6, 7 are sent in sequence at the SSB candidate positions. Figure 1 .

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] The term "comprise" and any variation thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, the use of "and / or" in the specification and claims to indicate at least one of the connected objects, such as A and / or B, means that A alone, B alone, and A and B exist in three cases.

[0064] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0065] The technology described in this article is not limited to the fifth-generation mobile communication (5th-generation, 5G) system and subsequent evolution communication systems, and is not limited to the evolution (LTE-Advanced, LTE-A) system of LTE / LTE, and can also be used in various wireless communication systems, such as Code Division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) and other systems.

[0066] The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants. A TDMA system may implement radio technologies such as Global System for Mobile Communication (GSM). An OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), Evolution-UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS). LTE and more advanced LTE (such as LTE-A) are new UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies.

[0067] The following describes an embodiment of the present invention in conjunction with the accompanying drawings. The synchronization indication method and device provided by the embodiment of the present invention can be applied to a wireless communication system. Figure 2 , is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present invention. Figure 2 As shown, the wireless communication system may include: a network device 20 and a terminal 21, the terminal 21 may be denoted as UE21, and the terminal 21 may communicate with the network device 20 and the network device 31 (transmit signaling or transmit data). In practical applications, the connection between the above-mentioned devices may be a wireless connection. In order to conveniently and intuitively represent the connection relationship between the devices, Figure 2 Solid lines are used to indicate.

[0068] The network device 20 provided in an embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node base station (eNB), or a network device in a 5G system (for example, a next generation node base station (gNB) or a transmission and reception point (TRP)).

[0069] The terminal 21 provided in the embodiment of the present invention can be a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), a mobile Internet device (MID), a wearable device (Wearable Device) or a vehicle-mounted device, etc.

[0070] See also Figure 3 The embodiment of the present invention further provides a synchronization indication method, the execution subject of the method may be a terminal, and the specific steps include: Step 301.

[0071] Step 301: Receive first information, where the first information indicates whether the terminal obtains a synchronization signal block (SSB) index of a target cell based on timing information of a serving cell.

[0072] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0073] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0074] In some implementations, the first information is received from the network side through broadcast information or measurement configuration. As an implementation, the first information is received through a Radio Resource Control (RRC) message MeasConfig. As another implementation, the first information is received through a System Information Block (SIB) message.

[0075] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. Further, the first threshold can be indicated by a network side device or pre-defined in the protocol.

[0076] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. The value of the first threshold can be at least one of the following:

[0077] (1) N symbol length, N is a positive number;

[0078] (2) The ratio to CP (extended prefix) meets the second threshold.

[0079] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0080] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0081] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0082] In some embodiments, the first information further indicates one or more of the following: (1) the system frame (SFN) boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0083] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0084] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0085] (1) N symbol length, N is a positive number;

[0086] (2) The ratio to CP (extended prefix) meets the second threshold.

[0087] In some implementations, the first information further indicates that the terminal obtains the timing information of the channel state information reference signal (CSI Reference Signal, CSI-RS) resource of the target cell through the timing information of the serving cell. In an embodiment of the present invention, the network sends auxiliary information to indicate whether the terminal can obtain the SSB index (SSB index) of the target cell of different frequency or system according to the timing information of the serving cell, thereby reducing the measurement delay of the target cell and improving the mobility performance.

[0088] See also Figure 4 The embodiment of the present invention further provides a synchronization indication method, the execution subject of the method may be a network device, and the specific steps include: Step 401.

[0089] Step 401: Send first information, where the first information indicates whether the terminal obtains the SSB index of the target cell based on the timing information of the serving cell.

[0090] Specifically, the network indicates which frequencies are synchronized with the serving cell, including the absolute radio frequency channel number (ARFCN, such as E-ARFCN, N-ARFCN) of the frequency to be measured, the absolute radio frequency channel number of the serving frequency, the target cell identifier, the serving cell identifier, etc.

[0091] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0092] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0093] In some implementations, the first information is sent to the terminal through broadcast information or measurement configuration. In some implementations, the first information is sent from the terminal through broadcast information or measurement configuration. As an implementation, the network sends the first information through a radio resource control (Radio Resource Control, RRC) message MeasConfig. As another implementation, the network sends the first information through a system information block (System Information Block, SIB) message.

[0094] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0095] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0096] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0097] In some embodiments, the first information further indicates one or more of the following: (1) the system frame boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0098] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0099] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0100] (1) N symbol length, N is a positive number;

[0101] (2) The ratio to CP (extended prefix) meets the second threshold.

[0102] In some implementations, the first information further instructs the terminal to acquire timing information of a channel state information reference signal (CSI Reference Signal, CSI-RS) resource of a target cell through timing information of a serving cell.

[0103] In an embodiment of the present invention, the network sends auxiliary information to indicate whether the terminal can obtain the SSB index of the target cell of different frequency or system according to the timing information of the serving cell, thereby reducing the measurement delay of the target cell and improving the mobility performance.

[0104] Combine the following Figure 5 The implementation of the embodiment of the present invention is introduced.

[0105] See also Figure 5 , the specific steps are as follows:

[0106] Step 501: The source base station obtains the timing information of the target base station according to the base station interface or through the network management or the core network, and the source base station determines whether it is synchronized with the target base station.

[0107] Step 502: If the source base station is synchronized with the target base station, the network sends the first information.

[0108] The first information indicates that all cells of the frequency point to be measured are SFN and frame aligned. If the source base station is not synchronized with the target base station, the network does not send the first information.

[0109] Furthermore, the network may also explicitly instruct the terminal to obtain the SSB index of the cell to be tested according to the timing information of the serving cell.

[0110] Step 503: If the terminal receives the first information, the terminal obtains the SSB index of the target cell according to the serving cell timing information.

[0111] If the terminal does not receive the first information, the terminal obtains the SSB index of the target cell according to the DMRS sequence of the PBCH and / or PBCH demodulation.

[0112] As an implementation mode, the network sends the first information via the RRC message MeasConfig.

[0113] As another implementation manner, the network sends the first information via a SIB message.

[0114] As an implementation mode, the first information is configured as true, and the terminal can obtain the SSB index of the target cell according to the timing information of the serving cell. The first information is not configured or configured as false, and the terminal cannot obtain the SSB index of the target cell according to the timing information of the serving cell.

[0115] The embodiment of the present invention further provides a terminal. Since the principle of solving the problem by the terminal is similar to that of the synchronization indication method in the embodiment of the present invention, the implementation of the terminal can refer to the implementation of the method, and the repeated parts will not be repeated.

[0116] See also Figure 6 An embodiment of the present invention further provides a terminal, the terminal 600 comprising: a first transceiver 601 and a first processor 602, wherein the first transceiver 601 is used to: receive first information, the first information indicating whether the terminal obtains the SSB index of the target cell according to the timing information of the serving cell.

[0117] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0118] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0119] In some implementations, the first transceiver 601 receives the first information from the network side through broadcast information or measurement configuration. As an implementation, the first information is received through a Radio Resource Control (RRC) message MeasConfig. As another implementation, the first information is received through a System Information Block (SIB) message.

[0120] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. Further, the first threshold can be indicated by a network side device or pre-defined in the protocol.

[0121] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. The value of the first threshold can be at least one of the following:

[0122] (1) N symbol length, N is a positive number;

[0123] (2) The ratio to CP (extended prefix) meets the second threshold.

[0124] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0125] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0126] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0127] In some embodiments, the first information further indicates one or more of the following: (1) the system frame (SFN) boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0128] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0129] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0130] (1) N symbol length, N is a positive number;

[0131] (2) The ratio to CP (extended prefix) meets the second threshold.

[0132] In some implementations, the first information further instructs the terminal to acquire timing information of a channel state information reference signal (CSI Reference Signal, CSI-RS) resource of a target cell through timing information of a serving cell.

[0133] The terminal provided in the embodiment of the present invention can execute the above embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0134] The embodiment of the present invention further provides a terminal. Since the principle of solving the problem by the terminal is similar to that of the synchronization indication method in the embodiment of the present invention, the implementation of the terminal can refer to the implementation of the method, and the repeated parts will not be repeated.

[0135] See also Figure 7 An embodiment of the present invention further provides a terminal, the terminal 700 includes: a receiving module 701, used to receive first information, the first information indicating whether the terminal obtains the synchronization signal block SSB index of the target cell according to the timing information of the serving cell.

[0136] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0137] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0138] In some implementations, the receiving module 701 receives the first information from the network side through broadcast information or measurement configuration. As an implementation, the first information is received through a radio resource control (Radio Resource Control, RRC) message MeasConfig. As another implementation, the first information is received through a system information block (System Information Block, SIB) message.

[0139] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. Further, the first threshold can be indicated by a network side device or pre-defined in the protocol.

[0140] In some implementations, the first information indicates that the terminal obtains the synchronization signal block index of the target cell according to the timing information of the serving cell, and also includes that the timing difference between the target cell and the serving cell is within a first threshold. The value of the first threshold can be at least one of the following:

[0141] (1) N symbol length, N is a positive number;

[0142] (2) The ratio to CP (extended prefix) meets the second threshold.

[0143] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0144] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0145] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0146] In some embodiments, the first information further indicates one or more of the following: (1) the system frame (SFN) boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0147] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0148] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0149] (1) N symbol length, N is a positive number;

[0150] (2) The ratio to CP (extended prefix) meets the second threshold.

[0151] In some implementations, the first information further instructs the terminal to acquire timing information of a channel state information reference signal (CSI Reference Signal, CSI-RS) resource of a target cell through timing information of a serving cell.

[0152] The terminal provided in the embodiment of the present invention can execute the above embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0153] A network device is also provided in the embodiment of the present invention. Since the principle of solving the problem by the network device is similar to the synchronization indication method in the embodiment of the present invention, the implementation of the network device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0154] See also Figure 8 An embodiment of the present invention further provides a network device, the network device 800 comprising: a second transceiver 801 and a second processor 802, wherein the second transceiver 801 is used to: send first information, the first information indicating whether the terminal obtains the SSB index of the target cell according to the timing information of the serving cell.

[0155] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0156] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0157] In some implementations, the second transceiver 801 sends the first information to the terminal by broadcasting information or measuring configuration. In some implementations, the first information is sent from the terminal by broadcasting information or measuring configuration. As an implementation, the network sends the first information via a Radio Resource Control (RRC) message MeasConfig. As another implementation, the network sends the first information via a System Information Block (SIB) message.

[0158] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0159] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0160] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0161] In some embodiments, the first information further indicates one or more of the following: (1) the system frame boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0162] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0163] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0164] (1) N symbol length, N is a positive number;

[0165] (2) The ratio to CP (extended prefix) meets the second threshold.

[0166] In some implementations, the first information further instructs the terminal to acquire timing information of a channel state information reference signal (CSI Reference Signal, CSI-RS) resource of a target cell through timing information of a serving cell.

[0167] The network device provided in the embodiment of the present invention can execute the above embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0168] A network device is also provided in the embodiment of the present invention. Since the principle of solving the problem by the network device is similar to the synchronization indication method in the embodiment of the present invention, the implementation of the network device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0169] See also Fig. 9 An embodiment of the present invention further provides a network device, the network device 900 comprising: a sending module 901, used to send first information, the first information indicating whether the terminal obtains the SSB index of the target cell according to the timing information of the serving cell.

[0170] In some embodiments, the first information includes: a first field, when the first field is a first value (for example, true), the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell; when the first field is a second value (for example, false), the first information indicates that the terminal does not need to obtain the SSB index of the target cell according to the timing information of the serving cell.

[0171] In other implementations, the first field is not configured in the first information, and the terminal cannot obtain the SSB index of the target cell based on the timing information of the serving cell.

[0172] In some implementations, the sending module 901 sends the first information to the terminal through broadcast information or measurement configuration. In some implementations, the first information is sent from the terminal through broadcast information or measurement configuration. As an implementation, the network sends the first information through a radio resource control (Radio Resource Control, RRC) message MeasConfig. As another implementation, the network sends the first information through a system information block (System Information Block, SIB) message.

[0173] In some embodiments, the first information further indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell.

[0174] In some implementations, the target cell is an inter-frequency cell or an inter-system cell.

[0175] In some implementations, the first information further indicates synchronization of all cells at the target frequency point.

[0176] In some embodiments, the first information further indicates one or more of the following: (1) the system frame boundary of the target cell is aligned with that of the serving cell; (2) the frame boundary of the target cell is aligned with that of the serving cell; (3) the time slot boundary of the target cell is aligned with that of the serving cell; (4) the symbol boundary of the target cell is aligned with that of the serving cell; (5) the frame boundary of the target cell is aligned with the time slot boundary of the serving cell; (6) the time slot boundary of the target cell is aligned with the frame boundary of the serving cell.

[0177] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The second threshold, the third threshold, and the fourth threshold may be indicated by a network-side device or may be pre-defined in a protocol.

[0178] In some implementations, the first information indicates one or more of the following: (1) the target cell is synchronized with the serving cell; (2) the target frequency is synchronized with the serving frequency; (3) the target frequency is synchronized with the serving cell. The synchronization also includes one or more of the following: (1) the timing difference between the target cell and the serving cell is within a second threshold; (2) the timing difference between the target frequency and the serving frequency is within a third threshold; (3) the timing difference between the target frequency and the serving cell is within a fourth threshold. The values ​​of the second threshold, the third threshold, and the fourth threshold may be at least one of the following:

[0179] (1) N symbol length, N is a positive number;

[0180] (2) The ratio to CP (extended prefix) meets the second threshold.

[0181] In some implementations, the first information further instructs the terminal to acquire timing information of a channel state information reference signal (CSI Reference Signal, CSI-RS) resource of a target cell through timing information of a serving cell.

[0182] The network device provided in the embodiment of the present invention can execute the above embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0183] See also Fig.10 , Fig.10 is a structural diagram of a communication device to which an embodiment of the present invention is applied, such as Fig.10 As shown, the communication device 1000 includes: a processor 1001, a transceiver 1002, a memory 1003 and a bus interface, wherein the processor 1001 may be responsible for managing the bus architecture and general processing. The memory 1003 may store data used by the processor 1001 when performing operations.

[0184] In one embodiment of the present invention, the communication device 1000 further includes: a program stored in the memory 1003 and executable on the processor 1001 , and the steps in the above method are implemented when the program is executed by the processor 1001 .

[0185] exist Fig.10 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1001 and various circuits of a memory represented by memory 1003 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1002 may be a plurality of components, namely, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The communication device provided in an embodiment of the present invention may execute the above-mentioned method embodiment, and its implementation principle and technical effect are similar, and this embodiment will not be repeated here.

[0186] The steps of the method or algorithm described in conjunction with the disclosure of the present invention may be implemented in hardware or by executing software instructions in a processor. The software instructions may be composed of corresponding software modules, which may be stored in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, read-only optical disks, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may be carried in an application specific integrated circuit (ASIC). In addition, the ASIC may be carried in a core network interface device. Of course, the processor and the storage medium may also exist in the core network interface device as discrete components.

[0187] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented using software, the functions may be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium may be any available medium that a general or special-purpose computer can access.

[0188] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solution of the present invention should be included in the scope of protection of the present invention.

[0189] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present invention may take the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Moreover, the embodiments of the present invention may take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0190] The embodiments of the present invention are described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0191] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0192] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0193] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A synchronization indication method, applied to a terminal, characterized in that: include: Receive first information, wherein the first information instructs the terminal to obtain the synchronization signal block SSB index of the target cell according to the timing information of the serving cell, and the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

2. The method according to claim 1, characterized in that The receiving of the first information comprises: The first information is received from the network side through broadcast information or measurement configuration.

3. The method according to claim 1, characterized in that The first information further indicates one or more of the following: The target cell is synchronized with the serving cell; The target frequency is synchronized with the service frequency; The target frequency is synchronized with the serving cell.

4. The method according to claim 1, characterized in that The first information also indicates that all cells of the target frequency point are synchronized.

5. The method according to claim 1, characterized in that The first information further indicates one or more of the following: The time slot boundaries of the target cell and the serving cell are aligned; The symbol boundaries of the target cell and the serving cell are aligned; The frame boundary of the target cell is aligned with the time slot boundary of the serving cell; The slot boundaries of the target cell are aligned with the frame boundaries of the serving cell.

6. The method according to claim 1, characterized in that The first information also instructs the terminal to obtain the timing information of the channel state information reference signal CSI-RS resources of the target cell through the timing information of the serving cell.

7. A synchronization indication method, applied to a network device, characterized in that: include: Sending first information, wherein the first information instructs the terminal to obtain the SSB index of the target cell according to the timing information of the serving cell, and the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

8. The method according to claim 7, characterized in that The sending of the first information includes: The first information is sent to the terminal through broadcast information or measurement configuration.

9. The method according to claim 7, characterized in that: The first information further indicates one or more of the following: The target cell is synchronized with the serving cell; The target frequency is synchronized with the service frequency; The target frequency is synchronized with the serving cell.

10. The method according to claim 7, characterized in that The first information also indicates that all cells of the target frequency point are synchronized.

11. The method according to claim 7, characterized in that The first information further indicates one or more of the following: The time slot boundaries of the target cell and the serving cell are aligned; The symbol boundaries of the target cell and the serving cell are aligned; The frame boundary of the target cell is aligned with the time slot boundary of the serving cell; The slot boundaries of the target cell are aligned with the frame boundaries of the serving cell.

12. The method according to claim 7, characterized in that The first information also instructs the terminal to obtain the timing information of the CSI-RS resources of the target cell through the timing information of the serving cell.

13. A terminal, characterized in that: include: A first transceiver and a first processor, wherein the first transceiver is used to: receive first information, wherein the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell, and the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

14. A terminal, characterized in that: include: A receiving module is used to receive first information, wherein the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell, and that the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

15. A network device, characterized in that: include: A second transceiver and a second processor, wherein the second transceiver is used to: send first information, wherein the first information indicates that the terminal obtains the SSB index of the target cell according to the timing information of the serving cell, and the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

16. A network device, characterized in that: include: A sending module is used to send first information, wherein the first information indicates that the terminal obtains the synchronization signal block SSB index of the target cell according to the timing information of the serving cell, and the system frame boundary of the target cell is aligned with that of the serving cell and / or the frame boundary of the target cell is aligned with that of the serving cell; wherein the target cell is an inter-frequency cell or an inter-system cell.

17. A communication device, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the synchronization indication method according to any one of claims 1 to 11 are implemented.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the synchronization indication method according to any one of claims 1 to 11 are implemented.

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