Synchronization method and device, terminal equipment and network equipment

Abstract

The embodiment of the invention provides a synchronization method and device, terminal equipment and network equipment, and the method comprises the steps that the terminal equipment determines a first time interval, and the first time interval is used for the terminal equipment to obtain synchronization information; and the terminal equipment acquires the synchronization information based on the first time interval, wherein the synchronization information is used for transmitting a first physical channel or signal.

Description

[0001] This application is a divisional application of the PCT international patent application PCT / CN2021 / 084168 with an application date of March 30, 2021, which entered the Chinese national phase with Chinese patent application number 202180096634.X and the invention name “A synchronization method and device, terminal equipment, and network equipment”. Technical Field

[0002] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a synchronization method and apparatus, terminal equipment, and network equipment. Background Art

[0003] Before transmitting channels or signals between terminal devices and network devices, the terminal devices and network devices need to achieve time and frequency synchronization. However, during continuous transmission, due to the long transmission time of the channel or signal, the time and frequency synchronization between the terminal devices and the network devices may fail. How to re-acquire time and frequency synchronization between the terminal devices and the network devices is a problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a synchronization method and apparatus, a terminal device, and a network device.

[0005] The synchronization method provided in the embodiment of the present application includes:

[0006] The terminal device determines a first time interval, where the first time interval is used for the terminal device to acquire synchronization information;

[0007] The terminal device obtains the synchronization information based on the first time interval, and the synchronization information is used to transmit a first physical channel or signal.

[0008] The synchronization method provided in the embodiment of the present application includes:

[0009] The network device sends configuration information of a first time interval to the terminal device, where the first time interval is used for the terminal device to obtain synchronization information, and the synchronization information is used for the terminal device to transmit a first physical channel or signal.

[0010] The synchronization device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0011] A determining unit, configured to determine a first time interval, wherein the first time interval is used for the terminal device to acquire synchronization information;

[0012] An acquisition unit is used to acquire the synchronization information based on the first time interval, where the synchronization information is used to transmit a first physical channel or signal.

[0013] The synchronization device provided in the embodiment of the present application is applied to a network device, and the device includes:

[0014] A sending unit is used to send configuration information of a first time interval to a terminal device, where the first time interval is used for the terminal device to obtain synchronization information, and the synchronization information is used for the terminal device to transmit a first physical channel or signal.

[0015] The terminal device provided in the embodiment of the present application may be the first device in the above scheme or the second device in the above scheme, and the communication device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above synchronization method.

[0016] The network device provided in the embodiment of the present application may be the first device in the above solution or the second device in the above solution, and the communication device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above synchronization method.

[0017] The chip provided in the embodiment of the present application is used to implement the above-mentioned synchronization method.

[0018] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned synchronization method.

[0019] The computer-readable storage medium provided in the embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned synchronization method.

[0020] The computer program product provided in the embodiment of the present application includes computer program instructions, which enable a computer to execute the above-mentioned synchronization method.

[0021] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned synchronization method.

[0022] Through the above technical solution, the terminal device determines the first time interval, obtains synchronization information within the first time interval, and then uses the synchronization information to transmit the first physical channel or signal. The technical solution of the embodiment of the present application can at least solve the problem of how to resynchronize the terminal device and the network device during continuous transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of an NTN scenario based on a transparent transmission forwarding satellite provided in an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of an NTN scenario based on a regenerative forwarding satellite provided in an embodiment of the present application;

[0029] Figure 6 This is a timing relationship diagram of the NTN system provided in the embodiment of the present application. Figure 1 ;

[0030] Figure 7 This is a timing relationship diagram of the NTN system provided in the embodiment of the present application. Figure 2 ;

[0031] Figure 8 is a schematic diagram of the relationship between WUS and PO provided in the embodiment of the present application;

[0032] Fig. 9 is a schematic diagram of the relationship between GWUS and PO provided in an embodiment of the present application;

[0033] Fig.10 It is a flowchart of the synchronization method provided in the embodiment of the present application;

[0034] Figure 11-1 This is a schematic diagram of the relationship between the first time interval and the first physical channel or signal provided in the embodiment of the present application. Figure 1 ;

[0035] Figure 11-2 This is a schematic diagram of the relationship between the first time interval and the first physical channel or signal provided in the embodiment of the present application. Figure 2 ;

[0036] Figure 11-3 This is a schematic diagram of the relationship between the first time interval and the first physical channel or signal provided in the embodiment of the present application. Figure 3 ;

[0037] Figure 12-1 This is a schematic diagram of the time domain resources within the first time interval provided in the embodiment of the present application. Figure 1 ;

[0038] Figure 12-2 This is a schematic diagram of the time domain resources within the first time interval provided in the embodiment of the present application. Figure 2 ;

[0039] Figure 12-3 This is a schematic diagram of the time domain resources within the first time interval provided in the embodiment of the present application. Figure 3 ;

[0040] Fig.13 is a schematic diagram of a first time interval of application example 1 provided in an embodiment of the present application;

[0041] Figure 14-1 This is a schematic diagram of the first time interval of the second application example provided in the embodiment of the present application. Figure 1 ;

[0042] Figure 14-2 This is a schematic diagram of the first time interval of the second application example provided in the embodiment of the present application. Figure 2 ;

[0043] Figure 15-1 This is a schematic diagram of the first time interval of the application example 3 provided in the embodiment of the present application. Figure 1 ;

[0044] Figure 15-2 This is a schematic diagram of the first time interval of the application example 3 provided in the embodiment of the present application. Figure 2 ;

[0045] Figure 15-3 is a schematic diagram of a first time interval of application example 4 provided in an embodiment of the present application;

[0046] Fig.16 This is a schematic diagram of the structure of the synchronization device provided in the embodiment of the present application. Figure 1 ;

[0047] Fig.17 This is a schematic diagram of the structure of the synchronization device provided in the embodiment of the present application. Figure 2 ;

[0048] Fig.18 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0049] Fig.19 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0050] Fig. 20 It is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0053] like Figure 1 As shown, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0054] It should be understood that the embodiments of the present application are only exemplified by the communication system 100, but the embodiments of the present application are not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine Type Communications (eMTC) system, 5G communication system (also called New Radio (NR) communication system), or future communication systems, etc.

[0055] exist Figure 1 In the communication system 100 shown, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area, and may communicate with the terminal device 110 (eg, UE) located in the coverage area.

[0056] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0057] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0058] For example, the terminal device 110 may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, 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 evolution network, etc.

[0059] The terminal device 110 may be used for device-to-device (D2D) communication.

[0060] The wireless communication system 100 may also include a core network device 130 for communicating with the base station, and the core network device 130 may be a 5G core network (5G Core, 5GC) device, for example, an access and mobility management function (Access and Mobility Management Function, AMF), and for example, an authentication server function (Authentication Server Function, AUSF), and for example, a user plane function (User Plane Function, UPF), and for example, a session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be an evolved packet core (Evolved Packet Core, EPC) device of the LTE network, for example, a session management function + a data gateway (Session Management Function + Core Packet Gateway, SMF + PGW-C) device of the core network. It should be understood that SMF + PGW-C can simultaneously implement the functions that SMF and PGW-C can implement. In the process of network evolution, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited to the embodiments of the present application.

[0061] The functional units in the communication system 100 may also establish connections through next generation (NG) network interfaces to achieve communication.

[0062] For example, the terminal device establishes an air interface connection with the access network device through the NR interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (N3 for short); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (N4 for short); the UPF can exchange user plane data with the data network through the NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (N11 for short); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (N7 for short).

[0063] Figure 1A base station, a core network device and two terminal devices are shown exemplarily. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0064] 3GPP is studying the technology of non-terrestrial network equipment (NTN). NTN generally uses satellite communication to provide communication services to ground users. Compared with ground cellular network communication, satellite communication has many unique advantages. First, satellite communication is not limited by the user's geographical location. For example, general land communication cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be set up or where communication coverage is not provided due to sparse population. For satellite communication, since one satellite can cover a large area of ​​land, and satellites can orbit around the earth, in theory, every corner of the earth can be covered by satellite communication. Secondly, satellite communication has great social value. Satellite communication can cover remote mountainous areas, poor and backward countries or regions at a low cost, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital divide with developed areas and promoting the development of these areas. Thirdly, satellite communication has a long distance, and the cost of communication does not increase significantly as the communication distance increases; finally, satellite communication has high stability and is not restricted by natural disasters.

[0065] NTN technology can be combined with various communication systems. For example, NTN technology can be combined with NR system to form NR-NTN system. For another example, NTN technology can be combined with Internet of Things (IoT) system to form IoT-NTN system. As an example, IoT-NTN system can include NB-IoT-NTN system and eMTC-NTN system.

[0066] Figure 2 It is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0067] like Figure 2 As shown, it includes a terminal device 1101 and a satellite 1102, and wireless communication can be performed between the terminal device 1101 and the satellite 1102. The network formed between the terminal device 1101 and the satellite 1102 can also be called NTN. Figure 2In the architecture of the communication system shown, the satellite 1102 may have the function of a base station, and the terminal device 1101 and the satellite 1102 may communicate directly. In the system architecture, the satellite 1102 may be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and each network device 1102 may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0068] Figure 3 It is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0069] like Figure 3 As shown, it includes terminal device 1201, satellite 1202 and base station 1203. Wireless communication can be performed between terminal device 1201 and satellite 1202, and satellite 1202 and base station 1203 can communicate with each other. The network formed by terminal device 1201, satellite 1202 and base station 1203 can also be called NTN. Figure 3 In the architecture of the communication system shown in FIG. 1 , the satellite 1202 may not have the function of a base station, and the communication between the terminal device 1201 and the base station 1203 needs to be transferred through the satellite 1202. In this system architecture, the base station 1203 can be called a network device. In some embodiments of the present application, the communication system may include multiple network devices 1203, and each network device 1203 may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application. The network device 1203 may be Figure 1 The network device 120 in.

[0070] It should be understood that the satellite 1102 or satellite 1202 includes but is not limited to:

[0071] Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, High Elliptical Orbit (HEO) satellites, etc. Satellites can use multiple beams to cover the ground. For example, a satellite can form dozens or even hundreds of beams to cover the ground. In other words, a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers to ensure satellite coverage and improve the system capacity of the entire satellite communication system.

[0072] As an example, the altitude range of LEO satellites can be 500 km to 1500 km, the corresponding orbital period can be about 1.5 hours to 2 hours, the signal propagation delay of single-hop communication between users can generally be less than 20 milliseconds, the maximum satellite visibility time can be 20 minutes, the signal propagation distance of LEO satellites is short and the link loss is small, and the transmission power requirements of user terminals are not high. The orbital altitude of GEO satellites can be 35786 km, the rotation period around the earth can be 24 hours, and the signal propagation delay of single-hop communication between users can generally be 250 milliseconds.

[0073] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0074] It should be noted that Figures 1 to 3 It is only to illustrate the system to which the present application is applicable in the form of an example. Of course, the method shown in the embodiment of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiment of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B. It should also be understood that the "correspondence" mentioned in the embodiment of the present application can mean that there is a direct or indirect correspondence relationship between the two, or it can mean that there is an association relationship between the two, or it can mean that there is an indication and being indicated, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to the definition in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, such as LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0075] Satellites can be divided into two types based on the functions they provide: transparent payload and regenerative payload. For transparent payload satellites, they only provide wireless frequency filtering, frequency conversion and amplification functions, and only provide transparent forwarding of signals without changing the waveform signal they forward. For regenerative payload satellites, in addition to providing wireless frequency filtering, frequency conversion and amplification functions, they can also provide demodulation / decoding, routing / conversion, encoding / modulation functions, and have some or all of the functions of a base station.

[0076] In the NTN, one or more gateways may be included for communication between satellites and terminals.

[0077] Figure 4 and Figure 5 Schematic diagrams of NTN scenarios based on transparent forwarding satellites and regenerative forwarding satellites are shown respectively.

[0078] like Figure 4 As shown in FIG, for NTN scenarios based on transparent forwarding satellites, the gateway and the satellite communicate through a feeder link, and the satellite and the terminal can communicate through a service link. Figure 5 As shown, for the NTN scenario based on regenerative forwarding satellites, satellites communicate with each other through interstar links, gateways and satellites communicate with each other through feeder links, and satellites and terminals communicate with each other through service links.

[0079] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application.

[0080] Timing relationship of IoT-NTN system

[0081] In terrestrial communication systems, the propagation delay of signal communication is usually less than 1 millisecond. In the IoT-NTN system, due to the long communication distance between the terminal device and the satellite (or network device), the propagation delay of signal communication is very large, ranging from tens of milliseconds to hundreds of milliseconds, which is related to the satellite orbit height and the type of satellite communication service. In order to handle the relatively large propagation delay, the timing relationship of the IoT-NTN system needs to be enhanced relative to the IoT system.

[0082] In the IoT-NTN system, like the IoT system, the terminal device needs to consider the impact of timing advance (TA) when performing uplink transmission. Since the propagation delay in the system is large, the range of TA values ​​is also relatively large. When the terminal device is scheduled to perform uplink transmission in subframe n, the terminal device considers the round-trip propagation delay and transmits in advance during uplink transmission, so that the signal can reach the network device side on the uplink subframe n on the network device side. Specifically, the timing relationship in the IoT-NTN system may include two situations, as follows: Figure 6 and Figure 7 shown.

[0083] Case 1: Figure 6 As shown, the downlink subframe and uplink subframe on the network device side are aligned. Accordingly, in order to align the uplink transmission of the terminal device with the uplink subframe on the network device side when it arrives at the network device side, the terminal device needs to use a larger TA value. In some cases, the TA value corresponds to the timing offset value Koffset. In other cases, the round trip time (RTT) of the terminal device corresponds to the timing offset value Koffset.

[0084] Case 2: Figure 7 As shown, there is an offset value between the downlink subframe and the uplink subframe on the network device side. In this case, if you want to align the uplink transmission of the terminal device with the uplink subframe on the network device side when it arrives at the network device side, the terminal device only needs to use a smaller TA value. In some cases, the TA value corresponds to the timing offset value Koffset.

[0085] eMTC System

[0086] In the Enhanced Machine Type Communication (eMTC) system, the terminal device includes a narrowband low complexity (Bandwidth reduced Low complexity, BL) / coverage enhancement (Coverage Enhancement, CE) terminal device. BL / CE terminal devices include two modes: CEModeA and CEModeB. Among them, the CEModeA mode supports coverage enhancement levels 0 and 1, and the CEModeB mode supports coverage enhancement levels 2 and 3. Coverage enhancement level 0 corresponds to the scenario with the best signal strength, and coverage enhancement level 3 corresponds to the scenario with the worst signal strength. The bandwidth received and sent by the BL / CE terminal device is a narrowband, as an example, including 6 consecutive RBs in the LTE cell bandwidth. If the bandwidth of the LTE cell is greater than 6 RBs, the LTE cell bandwidth may include multiple narrowbands. Each narrowband corresponds to a narrowband number.

[0087] In the eMTC system, in the initial access phase, the Physical Random Access Channel (PRACH) can support up to 128 repeated transmissions; for CEModeA, the Physical Uplink Shared Channel (PUSCH) can support up to 32 repeated transmissions, and for CEModeB, PUSCH can support up to 2048 repeated transmissions.

[0088] In the eMTC system, network equipment can provide services for stationary terminal devices or for terminal devices with a certain moving speed. For example, the Doppler spread caused by the moving speed of the terminal device can be 200 Hz (e.g., about 240 km / h at 1 MHz and about 120 km / h at 2 MHz). The eMTC system also supports dense positioning reference signal (PRS) configuration and new time interval patterns corresponding to dense PRS configuration.

[0089] In terms of reducing latency, the eMTC system supports the following features:

[0090] (1) When EARFCN (E-UTRA Absolute Radio Frequency Channel Number) pre-configuration is available, the initial access process of the terminal device can be accelerated by pre-configuring the EARFCN and geographical area for the terminal device.

[0091] (2) In a cell, when a terminal device needs to reacquire time and frequency synchronization, the terminal device can do so through a resynchronization signal (RSS) instead of a PSS / SSS signal, thereby saving time and power consumption.

[0092] (3) Reducing the number of acquisitions of Master Information Block (MIB) and System Information Block (SIB) 1 or SIB2 by enabling enhanced Cell Global Identity (CGI) acquisition.

[0093] (4) A flag bit is introduced into the MIB to indicate whether the SIB message has been updated in the past N hours. N represents the effective time of the system message. As an example, N is 3 or 24 hours. In other words, the terminal device does not need to frequently obtain SIB1 messages, thereby saving time and power consumption. The system message update indication is also copied in the RSS, that is, the terminal device may not need to frequently obtain MIB messages.

[0094] (5) Preconfigured Uplink Resource (PUR). The terminal device can use the uplink resources preconfigured by the network device for PUSCH transmission in the idle state without completing the random access process. The terminal device can request to be configured with PUR or request the release of PUR configuration when in the connected state. The network device can configure PUR for the terminal device based on the request of the terminal device, the registration information of the terminal device and / or local policy. PUR is only effective in the cell that receives the cell PUR configuration. When the upper layer requests to re-establish or restore the RRC connection, and the terminal device is configured with a valid PUR and meets the TA validity criteria, the PUR transmission can be triggered.

[0095] During the uplink transmission process, the terminal device may detect a positive confirmation (ACK) or fallback mode indication information carried by the MTC physical downlink control channel (MPDCCH) scrambled with PUR-Radio Network Temporary Identity (RNTI) in the PUR search space window. As an example, if the end subframe of the terminal device using the pre-configured uplink resources for PUSCH transmission is subframe n, the terminal device should detect MPDCCH in the PUR-MPDCCH search window starting from subframe n+4, and stop detecting MPDCCH in the PUR-MPDCCH search window after detecting the MPDCCH scrambled with PUR-RNTI, wherein the length of the PUR-MPDCCH search window is configured by high-level parameters.

[0096] In terms of reducing power consumption, in addition to the above features, the eMTC system also supports the following functions:

[0097] (1) Wake-Up Signals (WUS). A terminal device in an idle state can detect the MPDCCH through WUS detection. When the terminal device is configured with extended discontinuous reception (eDRX) in the idle state, the DRX cycle can be up to 10.24 seconds, with a maximum value of 2621.44 seconds (43.69 minutes).

[0098] When WUS or WUS group (Group WUS, GWUS) is configured, the power consumption of paging detection can be reduced. The terminal device detects WUS or GWUS only in the cell used last time. WUS or GWU is used to indicate that the terminal device should receive MPDCCH paging messages in this cell. For terminal devices that are not configured with eDRX, WUS or GWUS can be associated with one or more paging occasions (Paging Occasion, PO) in the Paging Time Window (Paging Time Window, PTW). If the terminal device detects WUS or WUS group, the terminal device should detect the next N POs, N≥1, until the terminal device receives a paging message.

[0099] The temporal relationship between WUS and PO is as follows Figure 8 As shown in Figure 2, the temporal relationship between GWUS and PO is as follows: Fig. 9As shown. The terminal device can expect WUS to be transmitted repeatedly within the configured maximum WUS duration, but the actual transmitted WUS may be shorter. In a non-zero gap, the terminal device does not detect WUS.

[0100] (2) Early Data Transmission (EDT). For scenarios where the terminal device only needs to transmit small data, such as data of about 100 bytes, the terminal device can transmit the data through Messages 3 and 4 in the random access process. In addition, the network device can also indicate to fall back to the legacy random access process at any time during the EDT process.

[0101] (3) Hybrid Automatic Repeat-reQuestAcknowledgement (HARQ-ACK) feedback for uplink transmission. When a terminal device is scheduled for uplink transmission, by introducing HARQ-ACK feedback information in the MPDCCH, the network device can indicate to the terminal device that the uplink transmission has been correctly received, so that the terminal device can terminate MPDCCH detection or PUSCH transmission in advance.

[0102] (4) Relaxation of detection for cell reselection: For stationary terminal devices, if the relaxation detection criteria are met, the terminal device can reduce neighbor cell measurements, for example, performing neighbor cell measurements only every 24 hours.

[0103] In addition, for terminal devices at a high coverage enhancement level, since dozens, hundreds or even thousands of repeated transmissions are required, more resource consumption is usually associated. In order to enhance the access control of network devices, an access prohibition mechanism based on coverage enhancement level is also introduced in the eMTC system. For example, if a terminal device at a certain coverage enhancement level is prohibited from access, all terminal devices with a coverage enhancement level higher than or equal to that level are prohibited from access.

[0104] Time and Frequency Synchronization in IoT-NTN System

[0105] In an IoT-NTN system (e.g., an eMTC-NTN system), the network device needs to send synchronization assistance information such as the ephemeris information of the service satellite to the terminal device, so that the terminal device can complete time domain and / or frequency domain synchronization. Accordingly, the terminal device needs to obtain the synchronization assistance information sent by the network device, and complete the corresponding time domain and / or frequency domain synchronization according to its own GNSS capability.

[0106] Since the range of TA values ​​in the IoT-NTN system may be very large, during the random access process, before sending the random access preamble sequence, the terminal device needs to pre-compensate the TA based on the estimated TA information and then send the PRACH sequence.

[0107] When the terminal device is in an idle state, if the terminal device receives a paging message or a WUS, the terminal device needs to perform time-frequency synchronization after receiving the paging message or the WUS, and then perform transmission, such as initiating a random access process.

[0108] For terminal devices in the IoT-NTN system, they usually do not have the ability to use GNSS capabilities and transmit and receive in the IoT-NTN system at the same time. The GNSS capability of the terminal device is implemented through the GNSS module, and the ability of the terminal device to transmit and receive in the IoT-NTN system is implemented through the IoT-NTN system working module. When the terminal device is in an idle state, if the terminal device receives a paging message or a WUS, the terminal device needs to perform time-frequency synchronization after receiving the paging message or the WUS; or, the terminal device needs to perform time-frequency synchronization in advance to receive the paging message or the WUS. In this process, the terminal device may need to start the GNSS module to locate the position of the terminal device, such as completing the GNSS first positioning time (Time To First Fix, TTFF), and then switch from the GNSS module to the IoT-NTN system working module, receive the NTN-SIB through the IoT-NTN system working module, and then obtain the ephemeris information of the service satellite from the NTN-SIB. A GNSS TTFF usually takes 1 second (hot start if the GNSS ephemeris information corresponding to the last TTFF is obtained within 4 hours) or less than 5 seconds (warm start if the GNSS almanac information corresponding to the last TTFF is obtained within 180 days). How to trigger GNSS search in IoT-NTN system is an unresolved problem.

[0109] In the eMTC system, PRACH can support up to 128 repetitions; for CEModeA, PUSCH can support up to 32 repetitions, and for CEModeB, PUSCH can support up to 2048 repetitions. In the NTN system, in a 600 km LEO scenario, the timing offset in a 28.4 millisecond RTT is about 0.71 microseconds, and in a 256 millisecond RTT, the total timing offset is about 6.4 microseconds, which exceeds the length of the PUSCH cyclic prefix. In addition, the Doppler shift changes to 544 Hz / second.

[0110] Since the uplink channel transmission time is relatively long, for example, when the length of continuous transmission is greater than 256 milliseconds, in the NTN system, the changes in timing offset and Doppler offset are greater. Therefore, in the IoT-NTN system, how to resynchronize the uplink transmission during the continuous uplink channel transmission is also a problem to be solved. To this end, the following technical solutions of the embodiments of the present application are proposed.

[0111] It should be noted that, although the above-mentioned related solutions are described with reference to uplink synchronization, the technical solution of the embodiment of the present application can not only solve the problem of uplink synchronization, but also solve the problem of downlink synchronization.

[0112] It should be noted that the technical solution of the embodiment of the present application can be but is not limited to being applied to NR-NTN systems and IoT-NTN systems.

[0113] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0114] Fig.10 is a flowchart of the synchronization method provided in the embodiment of the present application, such as Fig.10 As shown, the synchronization method comprises the following steps:

[0115] Step 1001: The terminal device determines a first time interval, where the first time interval is used for the terminal device to obtain synchronization information.

[0116] Step 1002: The terminal device obtains the synchronization information based on the first time interval, and the synchronization information is used to transmit a first physical channel or signal.

[0117] In some embodiments, the terminal device determines the first time interval, including: the terminal device determines at least one of the length of the first time interval, the starting position of the first time interval, and the ending position of the first time interval.

[0118] In some embodiments, the length of the first time interval is determined by:

[0119] The length of the first time interval is predefined; or,

[0120] The length of the first time interval is determined according to a predefined rule; or,

[0121] The length of the first time interval is obtained according to configuration information of the network device.

[0122] In some embodiments, the starting position of the first time interval is determined by:

[0123] The starting position of the first time interval is predefined; or,

[0124] The starting position of the first time interval is determined according to a predefined rule; or,

[0125] The starting position of the first time interval is obtained according to configuration information of the network device.

[0126] In some embodiments, the end position of the first time interval is determined by:

[0127] The end position of the first time interval is predefined; or,

[0128] The end position of the first time interval is determined according to a predefined rule; or,

[0129] The end position of the first time interval is obtained according to configuration information of the network device.

[0130] In some embodiments, for a network device, the network device sends configuration information of a first time interval to a terminal device, the first time interval is used by the terminal device to obtain synchronization information, and the synchronization information is used by the terminal device to transmit a first physical channel or signal. In some embodiments, the configuration information of the first time interval includes at least one of the following: the length of the first time interval; the starting position of the first time interval; and the ending position of the first time interval.

[0131] In some embodiments, the configuration information of the network device in the above solution is transmitted through at least one of the following information: system message, paging message, WUS, RRC signaling, MAC CE and DCI.

[0132] In some embodiments, the first time interval is determined based on a first offset value and / or a second offset value, wherein the first offset value is used to determine the distance between the starting position of the first time interval and the first physical channel or signal, and the second offset value is used to determine the distance between the ending position of the first time interval and the first physical channel or signal.

[0133] In some embodiments, the first offset value is predefined or determined according to a predefined rule; and / or the second offset value is predefined or determined according to a predefined rule.

[0134] In some embodiments, for a network device, the network device sends configuration information of a first time interval to a terminal device, and the configuration information of the first time interval includes a first offset value and / or a second offset value, wherein the first offset value is used to determine the distance between the starting position of the first time interval and the first physical channel or signal, and the second offset value is used to determine the distance between the end position of the first time interval and the first physical channel or signal.

[0135] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the starting position of the first time interval and the starting position of the first physical channel or signal; or, the first time interval is located after the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the ending position of the first physical channel or signal and the starting position of the first time interval.

[0136] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first time interval and the starting position of the first physical channel or signal; or, the first time interval is located after the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first physical channel or signal and the end position of the first time interval.

[0137] In some embodiments, the length of the first time interval in different situations is different; and / or the purpose of the first time interval in different situations is different. For example, the length of the first time interval used for downlink synchronization is different from the length of the first time interval used for uplink synchronization.

[0138] In some embodiments, the length of the first time interval is greater than 40 milliseconds.

[0139] As an example, see Figure 11-1 The first time interval is located before the first physical channel or signal in the time domain, the first offset value is used to determine the distance between the starting position of the first time interval and the starting position of the first physical channel or signal, and the second offset value is used to determine the distance between the end position of the first time interval and the starting position of the first physical channel or signal.

[0140] As an example, see Figure 11-2The first time interval is located after the first physical channel or signal in the time domain, the first offset value is used to determine the distance between the end position of the first physical channel or signal and the start position of the first time interval, and the second offset value is used to determine the distance between the end position of the first physical channel or signal and the end position of the first time interval.

[0141] In some embodiments, the first time interval has a first association relationship with the first physical channel or signal, wherein the first association relationship is obtained through at least one of a system message, a paging message, a WUS, an RRC signaling, a MAC CE and a DCI; or, the first association relationship is predefined or obtained according to a predefined rule.

[0142] In some embodiments, the first association relationship is predefined or obtained according to a predefined rule, including:

[0143] The first time interval is located before the first physical channel or signal in the time domain; or,

[0144] The first time interval is located after the first physical channel or signal in the time domain; or,

[0145] The first time interval is located in the middle of the first physical channel or signal in the time domain.

[0146] As an example, when the first physical channel or signal is an uplink physical channel or an uplink reference signal, the first time interval is located before the first physical channel or signal in the time domain, or the first time interval is used for uplink synchronization.

[0147] As an example, when the first physical channel or signal is a downlink physical channel or a downlink reference signal, the first time interval is located before the first physical channel or signal in the time domain, or the first time interval is used for downlink synchronization.

[0148] As an example, when the first physical channel or signal is a downlink physical channel or a downlink reference signal, the first time interval is located after the first physical channel or signal in the time domain, or the first time interval is used for uplink synchronization of subsequent uplink transmission.

[0149] As an example, see Figure 11-3 , one or more first time intervals are distributed in the middle of the first physical channel or signal.

[0150] In some embodiments, for a network device, the network device sends third information, the third information is used to determine the first association relationship, and the third information is carried in at least one of the following messages: system message, paging message, wake-up signal, RRC signaling, MAC CE, DCI.

[0151] In some embodiments, the first time interval has a second association relationship with second information, and the second information includes at least one of the following: satellite scene, terminal device capability, and coverage enhancement level.

[0152] In some embodiments, the second association relationship is obtained through at least one of a system message, a paging message, a wake-up signal, an RRC signaling, a MAC CE and a DCI; or, the second association relationship is predefined or obtained according to a predefined rule.

[0153] In some embodiments, the second information includes a satellite scene, and the second association relationship includes:

[0154] The length of the first time interval is determined according to the satellite scene; or,

[0155] The length of the first time interval is configured by the network device according to the satellite scenario.

[0156] As an example, in a GEO satellite scenario, the length of the first time interval is L1, and in a LEO satellite scenario, the first time interval is L2, and the L1 value is greater than the L2 value.

[0157] In some embodiments, the second information includes terminal device capabilities, and the second association relationship includes:

[0158] The length of the first time interval is determined according to the capability of the terminal device; or,

[0159] The length of the first time interval is configured by the network device according to the capability of the terminal device.

[0160] As an example, the terminal device determines the first time interval according to the terminal device capabilities supported by the terminal device. For example: the terminal device supports the first coverage enhancement level, and the terminal device determines the length of the first time interval to be L1; or the terminal device supports the second coverage enhancement level, and the terminal device determines the length of the first time interval to be L2. For example: the terminal device supports the CEModeA mode, and the terminal device determines the length of the first time interval to be L1; or the terminal device supports the CEModeB mode, and the terminal device determines the length of the first time interval to be L2.

[0161] As an example, the network device configures the length of the first time interval according to the terminal device capability. Optionally, the terminal device reports the terminal device capabilities supported by itself to the network device. For example: if the terminal device capability supports the first coverage enhancement level, the network device configures the first time interval within the first time interval configuration range; if the terminal device capability supports the second coverage enhancement level, the network device configures the first time interval within the second time interval configuration range. For example: if the terminal device capability supports the CEModeA mode, the network device configures the first time interval within the first time interval configuration range; if the terminal device capability supports the CEModeB mode, the network device configures the first time interval within the second time interval configuration range.

[0162] In some embodiments, the second information includes a coverage enhancement level, and the second association relationship includes:

[0163] The length of the first time interval is determined according to the coverage enhancement level corresponding to the terminal device; or,

[0164] The length of the first time interval is configured by the network device according to the coverage enhancement level.

[0165] As an example, the terminal device determines the first time interval according to its corresponding coverage enhancement level. For example, the terminal device corresponds to the first coverage enhancement level, and the terminal device determines the length of the first time interval to be L1; or the terminal device corresponds to the second coverage enhancement level, and the terminal device determines the length of the first time interval to be L2.

[0166] As an example, the network device configures the length of the first time interval according to the coverage enhancement level corresponding to the terminal device. For example: if the terminal device corresponds to the first coverage enhancement level, the network device configures the first time interval within the first time interval configuration range; if the terminal device corresponds to the second coverage enhancement level, the network device configures the first time interval within the second time interval configuration range.

[0167] In some embodiments, for a network device, the network device sends fourth information, the fourth information is used to determine the second association relationship, and the fourth information is carried in at least one of the following messages: system message, paging message, wake-up signal, RRC signaling, MAC CE, DCI.

[0168] In an embodiment of the present application, the first time interval is used by the terminal device to obtain synchronization information. In some embodiments, the synchronization information includes at least one of the following: uplink timing synchronization, uplink frequency deviation synchronization, downlink timing synchronization, and downlink frequency deviation synchronization.

[0169] Among them, uplink timing synchronization is used for terminal equipment to achieve uplink time domain synchronization; uplink frequency deviation synchronization is used for terminal equipment to achieve uplink frequency domain synchronization; downlink timing synchronization is used for terminal equipment to achieve downlink time domain synchronization; downlink frequency deviation synchronization is used for terminal equipment to achieve downlink frequency domain synchronization.

[0170] In some embodiments, the terminal device performs uplink frequency domain and / or uplink time domain synchronization based on uplink timing synchronization and / or uplink frequency offset synchronization. From another perspective, the terminal device sends the first physical channel or signal based on uplink timing synchronization and / or uplink frequency offset synchronization.

[0171] In some embodiments, the terminal device performs downlink frequency domain and / or downlink time domain synchronization based on downlink timing synchronization and / or downlink frequency offset synchronization. From another perspective, the terminal device receives the first physical channel or signal based on downlink timing synchronization and / or downlink frequency offset synchronization.

[0172] In the embodiment of the present application, the synchronization information is acquired by the positioning module and / or communication module of the terminal device.

[0173] Here, the terminal device has a positioning module and / or a communication module. In some embodiments, when the terminal device has a positioning module and a communication module, the positioning module and the communication module of the terminal device cannot work at the same time.

[0174] In some embodiments, the positioning module of the terminal device includes a GNSS module.

[0175] In some embodiments, the communication module of the terminal device is used to implement the communication function of the terminal device in a mobile communication system. As an example, the mobile communication system may be, but is not limited to, an IoT-NTN system.

[0176] In an embodiment of the present application, the synchronization information is obtained based on first information, and the first information includes at least one of the following: timing information, timing change information, frequency deviation information, frequency deviation change information, position information, and ephemeris information.

[0177] In some embodiments, the timing information comprises common timing information.

[0178] In some embodiments, the timing change information comprises common timing change information.

[0179] In some embodiments, the frequency offset information includes common frequency offset information.

[0180] In some embodiments, the frequency offset change information includes common frequency offset change information.

[0181] In some embodiments, the location information includes location information of the terminal device and / or location information of the network device.

[0182] In some embodiments, the ephemeris information includes ephemeris information of a serving satellite and / or ephemeris information of a non-serving satellite; wherein the ephemeris information includes position information of a satellite and / or speed information of a satellite.

[0183] In some embodiments, the positioning module of the terminal device is used to obtain the first information through a positioning search (such as a GNSS search) function. As an example, the positioning module of the terminal device is used to obtain at least one of the following information in the first information: location information of the terminal device, ephemeris information of a non-serving satellite.

[0184] In some embodiments, the communication module of the terminal device is used to obtain a system message and / or a downlink reference signal, and the system message and / or the downlink reference signal carries the first information. As an example, the system message and / or the downlink reference signal carries at least one of the following information in the first information: public timing information, public timing change information, public frequency deviation information, public frequency deviation change information, location information of a network device, and ephemeris information of a service satellite.

[0185] In some embodiments, the terminal device obtains information such as the location of the terminal device based on its Global Navigation Satellite System (GNSS). In addition, the terminal device can calculate the timing and frequency deviation based on the information obtained by the GNSS and the synchronization assistance information indicated by the network device (such as the ephemeris information of the service satellite), and apply the timing advance compensation or frequency deviation adjustment in the idle state, inactive state or connected state.

[0186] Additionally, network devices may broadcast a common timing offset value.

[0187] In some embodiments, the terminal device estimates a UE-specific TA based on the location of the terminal device obtained by GNSS and the ephemeris information of the serving satellite indicated by the network device.

[0188] In some embodiments, the terminal device estimates the UE-specific TA based on a reference time obtained by the GNSS and a reference time indicated by the network device.

[0189] In some embodiments, for example, before the random access process is initiated (before transmitting Msg1 or MsgA), the terminal device in an idle state or an inactive state can calculate the TA value according to the following formula:

[0190] TA=(N TA,UE-specific +N TA,offset +N TA,common )*Ts.

[0191] Among them, N TA,UE-specific It can be the UE-specific TA value estimated by the terminal device itself, N TA,offset Same as the existing protocol, for example, it is determined according to the network deployment frequency band and LTE or NR coexistence conditions, or is predefined or indicated by the network device or is set to 0, N TA,common It is determined according to the timing information and / or the timing change information, and Ts represents a sampling time interval unit.

[0192] In some cases, Ts=1 / (15*1000*2048).

[0193] In some cases, if the terminal device does not obtain the timing information and / or the timing change information, N TA,common The default value or N TA,common is 0.

[0194] In some embodiments, for example, if the terminal device receives a TA value indicated by a network device, the TA value may be calculated according to the following formula:

[0195] TA=(N TA +N TA,UE-specific +N TA,common +N TA,offset )*Ts

[0196] Among them, N TA,UE-specific It can be the TA value estimated by the terminal device itself, N TA,offset Same as the existing protocol, for example, it is determined according to the network deployment frequency band and LTE or NR coexistence conditions, or is predefined or indicated by the network device or is set to 0, N TA It can be the TA value indicated by the network device through the Random Access Response (RAR) or the timing advance command MAC CE, N TA,common It is determined according to the timing information and / or the timing change information, and Ts represents a sampling time interval unit.

[0197] In some cases, Ts=1 / (15*1000*2048).

[0198] In some cases, if the terminal device does not obtain the timing information and / or the timing change information, N TA,common The default value or N TA,common is 0.

[0199] That is, in some cases, the terminal device needs to calculate the TA value N according to the TA value estimated by the terminal device itself, the timing information and / or the timing change information broadcast by the network device, and the TA value N sent by the network device. TA Jointly estimate and update TA.

[0200] In some embodiments, the first physical channel or signal includes an uplink physical channel or an uplink reference signal, and the synchronization information is used to send the first physical channel or signal. As an example, the first physical channel or signal includes at least one of the following: a physical random access channel (PRACH), a message 3 (Msg3) in a random access process, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), early data transmission (EDT), and transmission based on preconfigured uplink resources (PUR). As an example, for the NR-NTN system, the first physical channel or signal also includes a message A (MsgA) in a random access process, wherein MsgA includes MsgAPRACH and MsgAPUSCH.

[0201] In some embodiments, the first physical channel or signal includes a downlink physical channel or a downlink reference signal, and the synchronization information is used to receive the first physical channel or signal. As an example, the first physical channel or signal includes at least one of the following: a wake-up signal (WUS), a physical downlink control channel (PDCCH) scrambled by a paging-radio network temporary identity (P-RNTI), a paging message, a synchronization signal, and a system message. Here, the system message includes an MIB and / or a SIB. As an example, for an NTN system, the SIB includes an NTN system-specific SIB (NTN-SIB).

[0202] In some embodiments, the synchronization information includes a TA value corresponding to the uplink timing synchronization of the terminal device; and the terminal device performs TA adjustment based on the first time interval and the TA value.

[0203] In some embodiments, the time domain resources in the first time interval satisfy at least one of the following characteristics:

[0204] At least part of the time domain resources in the first time interval are not used for sending and receiving by the communication module of the terminal device;

[0205] At least part of the time domain resources in the first time interval are used for searching by a positioning module of the terminal device;

[0206] At least part of the time domain resources in the first time interval are used by the communication module of the terminal device to receive system messages and / or downlink reference signals sent by the network device;

[0207] At least part of the time domain resources in the first time interval is used for the terminal device to perform TA adjustment.

[0208] As an example, see Figure 12-1 In the first time interval, time domain resource 1 is used by the positioning module of the terminal device for searching, and in the first time interval, time domain resource 1 is not used by the communication module of the terminal device for sending and receiving.

[0209] As an example, see Figure 12-2 , in the first time interval, time domain resource 1 is used for the positioning module of the terminal device to search, and in the first time interval, time domain resource 2 is used for the communication module of the terminal device to receive the system message and / or downlink reference signal sent by the network device. Alternatively, in the first time interval, time domain resource 1 is used for the communication module of the terminal device to receive the system message and / or downlink reference signal sent by the network device, and in the first time interval, time domain resource 2 is used for the positioning module of the terminal device to search. Here, the positioning module and the communication module of the terminal device cannot work at the same time, and the time domain resource 1 corresponding to the positioning module and the time domain resource 2 corresponding to the communication module cannot overlap. It should be pointed out that since it takes a certain amount of time for the terminal device to switch between the positioning module and the communication module, there can be a small interval between time domain resource 1 and time domain resource 2.

[0210] As an example, see Figure 12-3 , time domain resource 0 in the first time interval is used by the terminal device to obtain the first information, and to determine the synchronization information based on the first information, such as the TA value corresponding to the uplink timing synchronization. Here, time domain resource 0 is used by the terminal device to obtain the first information, including: time domain resource 0 is used by the positioning module of the terminal device to search and / or the communication module to receive the system message and / or downlink reference signal sent by the network device, and obtain the first information from the search results and / or the system message and / or downlink reference signal. Furthermore, since the positioning module and the communication module of the terminal device cannot work at the same time, the time domain resources corresponding to the positioning module and the time domain resources corresponding to the communication module cannot overlap. Here, time domain resource 0 may include Figure 12-2 The time domain resource 1 and the time domain resource 2 in the first time interval are used by the terminal device to adjust the TA based on the determined TA value. Further, after the first time interval, the terminal device can send a first physical channel or signal based on the adjusted TA.

[0211] In some embodiments, in order to enable uplink transmission immediately after the first time interval, the length of the first time interval satisfies at least one of the following characteristics:

[0212] The length of the first time interval is greater than or equal to the timing offset length corresponding to the TA value;

[0213] The length of the first time interval is greater than or equal to the timing offset length corresponding to the maximum value of the TA value;

[0214] The length of the first time interval is greater than or equal to the length corresponding to the round-trip transmission time between the terminal device and the network device.

[0215] In some embodiments, the timing offset length is greater than or equal to the timing offset value Koffset.

[0216] The following describes how the terminal device acquires synchronization information based on its positioning module and / or communication module.

[0217] Method 1

[0218] In some embodiments, the terminal device acquires the synchronization information based on a first time domain resource in the first time interval and a positioning module of the terminal device, wherein the first time domain resource is at least part of the time domain resource in the first time interval. Here, the first time domain resource is not used for the communication module of the terminal device to send and receive.

[0219] Specifically, the terminal device uses the positioning module to search on the first time domain resource in the first time interval, so as to obtain at least one of the following information in the first information: location information of the terminal device and ephemeris information of the non-service satellite.

[0220] Method 2

[0221] In some embodiments, the terminal device acquires the synchronization information based on a second time domain resource in the first time interval and a communication module of the terminal device, wherein the second time domain resource is at least a portion of the time domain resource in the first time interval.

[0222] Specifically, the terminal device uses a communication module to receive a system message and / or a downlink reference signal on a second time domain resource in a first time interval, and obtains at least one of the following information in the first information from the system message and / or the downlink reference signal: public timing information, public timing change information, public frequency deviation information, public frequency deviation change information, location information of a network device, and ephemeris information of a service satellite.

[0223] Method 3

[0224] In some embodiments, the terminal device acquires the synchronization information based on a first time domain resource in the first time interval and a positioning module of the terminal device, and acquires the synchronization information based on a second time domain resource in the first time interval and a communication module of the terminal device; wherein the first time domain resource is at least part of the time domain resource in the first time interval, and the second time domain resource is at least part of the time domain resource in the first time interval. The first time domain resource and the second time domain resource do not overlap in the time domain.

[0225] Specifically, the terminal device uses the positioning module to search on the first time domain resource in the first time interval, so as to obtain at least one of the following information in the first information: the location information of the terminal device and the ephemeris information of the non-service satellite. The terminal device uses the communication module to receive the system message and / or the downlink reference signal on the second time domain resource in the first time interval, and obtains at least one of the following information in the first information from the system message and / or the downlink reference signal: public timing information, public timing change information, public frequency deviation information, public frequency deviation change information, the location information of the network device, and the ephemeris information of the service satellite.

[0226] The technical solution of the embodiment of the present application is illustrated below with reference to application examples.

[0227] Application Example 1

[0228] Reference Fig.13 , taking the first physical channel or signal including a paging message as an example, the first time interval is the time interval after the first physical channel or signal. If the terminal device receives a paging message on the paging opportunity, the terminal device obtains synchronization information within the first time interval, and further, the terminal device performs time-frequency synchronization based on the synchronization information within the first time interval, such as TA adjustment. If the terminal device does not receive a paging message on the paging opportunity, the terminal device ignores the first time interval.

[0229] Application Example 2

[0230] Reference Figure 14-1 and Figure 14-2 , taking the first physical channel or signal including WUS / GWUS and paging message as an example, the first time interval is the time interval after the first physical channel or signal (such as Figure 14-1 ) or the first time interval is the time interval between the WUS / GWUS and the paging message (as shown in Figure 14-2 The second time interval is the time interval between the WUS / GWUS and the paging message (as shown in FIG. Figure 8 or Fig. 9 The first time interval and the second time interval may not overlap at all, or may overlap at least partially, which is not limited in the present application.

[0231] If the terminal device receives WUS / GWUS, the terminal device acquires synchronization information in the first time interval, and further, the terminal device performs time-frequency synchronization based on the synchronization information in the first time interval, such as TA adjustment. If the terminal device does not receive WUS / GWUS, the terminal device ignores the first time interval.

[0232] Application Example 3

[0233] The terminal device is configured with PUR. The terminal device can use the uplink resources (i.e. PUR) pre-configured by the network device for PUSCH transmission in the idle state without completing the random access process. The terminal device can request to be configured with PUR or request the release of PUR configuration when in the connected state. The network device can configure PUR for the terminal device based on the request of the terminal device, the registration information of the terminal device and / or the local policy. PUR is only effective in the cell that receives the cell PUR configuration.

[0234] Reference Figure 15-1 and Figure 15-2 , taking the first physical channel or signal including PUR-based transmission as an example, the first time interval is located before the PUR in the time domain. When the upper layer requests to re-establish or restore the RRC connection, and the terminal device is configured with a valid PUR, the terminal device should obtain synchronization information within the first time interval. Furthermore, the terminal device performs time and frequency synchronization based on the synchronization information within the first time interval, such as TA adjustment. When the TA validity criterion is met, the terminal device can trigger a PUR-based transmission. Here, if the PUR-based transmission lasts for a long time, one or more first time intervals are also required in the middle of the uplink transmission to ensure that the terminal device re-synchronizes time and frequency.

[0235] like Figure 15-1 As shown, after the PUR-based transmission, the terminal device detects a downlink control channel such as MPDCCH with PUR-RNTI scrambling in a PUR search space window (e.g., a PUR-MPDCCH search window). If the downlink control channel is not detected or the downlink control channel is detected to carry fallback mode indication information, the terminal device performs time-frequency synchronization in the first time interval after the PUR search space window, and then performs uplink transmission.

[0236] like Figure 15-2 As shown, after the PUR-based transmission, the terminal device detects the downlink control channel such as MPDCCH scrambled by PUR-RNTI in the PUR search space window (e.g., PUR-MPDCCH search window). If it is detected that the downlink control channel carries ACK information, the terminal device can stop detecting the downlink control channel.

[0237] In the above scheme, if the end subframe of the terminal device using PUR for PUSCH transmission is subframe n, the terminal device should detect MPDCCH in the PUR search space window starting from subframe n+k. As an example, the value of k is 4 or the value of k is 4+Koffset.

[0238] Application Example 4

[0239] The terminal device is configured or scheduled to transmit a first physical channel or signal, wherein the time domain resources occupied by the first physical channel or signal are very long. Accordingly, the terminal device may include multiple first time intervals in the transmission process of the first physical channel or signal according to the predefined or network device configuration. The lengths of the multiple first time intervals may be the same; or, the lengths of at least two of the multiple first time intervals may be different. In some embodiments, the time length of continuous transmission of the first physical channel or signal is less than 256 milliseconds.

[0240] like Figure 15-3 As shown, the first physical channel or signal is a first physical uplink shared channel, wherein the length of the first physical uplink shared channel is 512 milliseconds, and it is assumed that according to a predefined rule, the time length of continuous transmission of the first physical channel or signal is 128 milliseconds. Then, during the transmission of the first physical uplink shared channel, each continuous transmission of 128 milliseconds needs to include a first time interval, that is, a total of 4 first time intervals are included. Different first time intervals may correspond to different terminal device behaviors. In this example, the first and third first time intervals are used for uplink synchronization acquisition and TA adjustment, corresponding to the first length; the second and fourth first time intervals are used for TA adjustment, corresponding to the second length. In this example, the first length is greater than the second length.

[0241] The technical solution of the embodiment of the present application can solve the problem of how to resynchronize the terminal device and the network device during the continuous transmission of the channel or signal.

[0242] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further explain various possible combinations. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in the various embodiments described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the protection scope of the present application.

[0243] It should also be understood that in various method embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. In addition, in the embodiment of the present application, the terms "downlink", "uplink" and "side" are used to indicate the transmission direction of the signal or data, wherein "downlink" is used to indicate that the transmission direction of the signal or data is the first direction sent from the site to the user equipment of the cell, "uplink" is used to indicate that the transmission direction of the signal or data is the second direction sent from the user equipment of the cell to the site, and "side" is used to indicate that the transmission direction of the signal or data is the third direction sent from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the front and back associated objects are in an "or" relationship.

[0244] Fig.16 This is a schematic diagram of the structure of the synchronization device provided in the embodiment of the present application. Figure 1 , applied to terminal devices, such as Fig.16 As shown, the synchronization device includes:

[0245] A determining unit 1601 is configured to determine a first time interval, where the first time interval is used for the terminal device to acquire synchronization information;

[0246] The acquiring unit 1602 is configured to acquire the synchronization information based on the first time interval, where the synchronization information is used to transmit a first physical channel or signal.

[0247] In some embodiments, the synchronization information includes at least one of the following:

[0248] Uplink timing synchronization, uplink frequency deviation synchronization, downlink timing synchronization, downlink frequency deviation synchronization.

[0249] In some embodiments, the synchronization information is acquired by a positioning module and / or a communication module of the terminal device.

[0250] In some embodiments, the synchronization information is obtained based on first information, and the first information includes at least one of the following:

[0251] Timing information, timing change information, frequency deviation information, frequency deviation change information, position information, ephemeris information.

[0252] In some embodiments, the timing information comprises common timing information.

[0253] In some embodiments, the timing change information comprises common timing change information.

[0254] In some embodiments, the frequency offset information includes common frequency offset information.

[0255] In some embodiments, the frequency offset change information includes common frequency offset change information.

[0256] In some embodiments, the location information includes location information of the terminal device and / or location information of the network device.

[0257] In some embodiments, the ephemeris information includes ephemeris information of a serving satellite and / or ephemeris information of a non-serving satellite;

[0258] The ephemeris information includes satellite position information and / or satellite speed information.

[0259] In some embodiments, the communication module of the terminal device is used to obtain a system message and / or a downlink reference signal, and the system message and / or the downlink reference signal carries the first information.

[0260] In some embodiments, the first physical channel or signal includes an uplink physical channel or an uplink reference signal, and the synchronization information is used to send the first physical channel or signal.

[0261] In some embodiments, the first physical channel or signal includes at least one of the following:

[0262] PRACH, message 3 during random access, PUSCH, PUCCH, EDT, PUR-based transmission.

[0263] In some embodiments, the first physical channel or signal includes a downlink physical channel or a downlink reference signal, and the synchronization information is used to receive the first physical channel or signal.

[0264] In some embodiments, the first physical channel or signal includes at least one of the following:

[0265] WUS, P-RNTI scrambled PDCCH, paging message, synchronization signal, system message.

[0266] In some embodiments, at least part of the time domain resources in the first time interval are not used for the communication module of the terminal device to send and receive; and / or,

[0267] At least part of the time domain resources in the first time interval are used for searching by the positioning module of the terminal device; and / or,

[0268] At least part of the time domain resources in the first time interval are used by the communication module of the terminal device to receive system messages and / or downlink reference signals sent by the network device; and / or,

[0269] At least part of the time domain resources in the first time interval is used for the terminal device to perform TA adjustment.

[0270] In some embodiments, the acquisition unit 1602 is used to acquire the synchronization information based on a first time domain resource in the first time interval and a positioning module of the terminal device, wherein the first time domain resource is at least a part of the time domain resource in the first time interval.

[0271] In some embodiments, the first time domain resource is not used for transmission and reception by the communication module of the terminal device.

[0272] In some embodiments, the acquisition unit 1602 is used to acquire the synchronization information based on a second time domain resource in the first time interval and a communication module of the terminal device, wherein the second time domain resource is at least a part of the time domain resource in the first time interval.

[0273] In some embodiments, the acquisition unit 1602 is used to acquire the synchronization information based on a first time domain resource in the first time interval and a positioning module of the terminal device, wherein the first time domain resource is at least part of the time domain resource in the first time interval, and the first time domain resource and the second time domain resource do not overlap in the time domain.

[0274] In some embodiments, the synchronization information includes a timing advance TA value corresponding to the uplink timing synchronization of the terminal device; the apparatus further includes:

[0275] The adjusting unit 1603 is configured to perform TA adjustment based on the first time interval and the TA value.

[0276] In some embodiments, the length of the first time interval satisfies at least one of the following characteristics:

[0277] The length of the first time interval is greater than or equal to the timing offset length corresponding to the TA value;

[0278] The length of the first time interval is greater than or equal to the timing offset length corresponding to the maximum value of the TA value;

[0279] The length of the first time interval is greater than or equal to the length corresponding to the round-trip transmission time between the terminal device and the network device.

[0280] In some embodiments, the length of the first time interval is predefined; or,

[0281] The length of the first time interval is determined according to a predefined rule; or,

[0282] The length of the first time interval is obtained according to configuration information of the network device.

[0283] In some embodiments, the starting position of the first time interval is predefined; or,

[0284] The starting position of the first time interval is determined according to a predefined rule; or,

[0285] The starting position of the first time interval is obtained according to configuration information of the network device.

[0286] In some embodiments, the end position of the first time interval is predefined; or,

[0287] The end position of the first time interval is determined according to a predefined rule; or,

[0288] The end position of the first time interval is obtained according to configuration information of the network device.

[0289] In some embodiments, the configuration information of the network device is transmitted via at least one of the following information:

[0290] System messages, paging messages, WUS, radio resource control RRC signaling, media access control MAC control element CE and downlink control information DCI.

[0291] In some embodiments, the first time interval is determined based on a first offset value and / or a second offset value, wherein the first offset value is used to determine the distance between the starting position of the first time interval and the first physical channel or signal, and the second offset value is used to determine the distance between the ending position of the first time interval and the first physical channel or signal.

[0292] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the starting position of the first time interval and the starting position of the first physical channel or signal; or,

[0293] The first time interval is located after the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the end position of the first physical channel or signal and the start position of the first time interval.

[0294] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first time interval and the start position of the first physical channel or signal; or,

[0295] The first time interval is located after the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first physical channel or signal and the end position of the first time interval.

[0296] In some embodiments, the first time interval has a first association relationship with the first physical channel or signal, wherein:

[0297] The first association relationship is obtained through at least one of a system message, a paging message, a wake-up signal, an RRC signaling, a MAC CE, and a DCI; or,

[0298] The first association relationship is predefined or acquired according to a predefined rule.

[0299] In some embodiments, the first association relationship is predefined or obtained according to a predefined rule, including:

[0300] The first time interval is located before the first physical channel or signal in the time domain; or,

[0301] The first time interval is located after the first physical channel or signal in the time domain; or,

[0302] The first time interval is located in the middle of the first physical channel or signal in the time domain.

[0303] In some embodiments, the first time interval has a second association relationship with second information, and the second information includes at least one of the following:

[0304] Satellite scenarios, terminal device capabilities, and coverage enhancement levels.

[0305] In some embodiments, the second association relationship is obtained through at least one of a system message, a paging message, a wake-up signal, an RRC signaling, a MAC CE, and a DCI; or,

[0306] The second association relationship is predefined or acquired according to a predefined rule.

[0307] In some embodiments, the second information includes terminal device capabilities, and the second association relationship includes:

[0308] The length of the first time interval is determined according to the capability of the terminal device; or,

[0309] The length of the first time interval is configured by the network device according to the capability of the terminal device.

[0310] In some embodiments, the second information includes a coverage enhancement level, and the second association relationship includes:

[0311] The length of the first time interval is determined according to the coverage enhancement level corresponding to the terminal device; or,

[0312] The length of the first time interval is configured by the network device according to the coverage enhancement level.

[0313] Those skilled in the art should understand that the relevant description of the above-mentioned synchronization device in the embodiment of the present application can be understood by referring to the relevant description of the synchronization method in the embodiment of the present application.

[0314] Fig.17 This is a schematic diagram of the structure of the synchronization device provided in the embodiment of the present application. Figure 2 , applied to network equipment, such as Fig.17 As shown, the synchronization device includes:

[0315] The sending unit 1701 is used to send configuration information of a first time interval to a terminal device, where the first time interval is used for the terminal device to obtain synchronization information, and the synchronization information is used for the terminal device to transmit a first physical channel or signal.

[0316] In some embodiments, the configuration information of the first time interval includes at least one of the following:

[0317] the length of the first time interval;

[0318] a starting position of the first time interval;

[0319] The end position of the first time interval.

[0320] In some embodiments, the configuration information of the first time interval includes a first offset value and / or a second offset value, wherein:

[0321] The first offset value is used to determine the distance between the start position of the first time interval and the first physical channel or signal, and the second offset value is used to determine the distance between the end position of the first time interval and the first physical channel or signal.

[0322] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the starting position of the first time interval and the starting position of the first physical channel or signal; or,

[0323] The first time interval is located after the first physical channel or signal in the time domain, and the first offset value is used to determine the distance between the end position of the first physical channel or signal and the start position of the first time interval.

[0324] In some embodiments, the first time interval is located before the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first time interval and the start position of the first physical channel or signal; or,

[0325] The first time interval is located after the first physical channel or signal in the time domain, and the second offset value is used to determine the distance between the end position of the first physical channel or signal and the end position of the first time interval.

[0326] In some embodiments, the first time interval has a first association relationship with the first physical channel or signal.

[0327] In some embodiments, the sending unit 1701 is also used to send third information, where the third information is used to determine the first association relationship, and the third information is carried in at least one of the following messages: system message, paging message, wake-up signal, RRC signaling, MAC CE, and DCI.

[0328] In some embodiments, the first time interval has a second association relationship with second information, and the second information includes at least one of the following:

[0329] Satellite scenarios, terminal device capabilities, and coverage enhancement levels.

[0330] In some embodiments, the sending unit 1701 is also used to send fourth information, where the fourth information is used to determine the second association relationship, and the fourth information is carried in at least one of the following messages: system message, paging message, wake-up signal, RRC signaling, MAC CE, and DCI.

[0331] In some embodiments, the second information includes terminal device capabilities, and the apparatus further includes:

[0332] The configuration unit 1702 is used to configure the length of the first time interval according to the capability of the terminal device.

[0333] In some embodiments, the second information includes a coverage enhancement level, and the apparatus further comprises:

[0334] The configuration unit 1702 is configured to configure the length of the first time interval according to the coverage enhancement level.

[0335] In some embodiments, the configuration information of the first time interval is transmitted by at least one of the following information:

[0336] System messages, paging messages, WUS, RRC signaling, MAC CE and downlink control information DCI.

[0337] In some embodiments, the first time domain resource in the first time interval is used by the positioning module of the terminal device to obtain the synchronization information, wherein the first time domain resource is at least part of the time domain resource in the first time interval.

[0338] In some embodiments, the first time domain resource is not used for transmission and reception by the communication module of the terminal device.

[0339] In some embodiments, the second time domain resources in the first time interval are used by the communication module of the terminal device to obtain the synchronization information, wherein the second time domain resources are at least part of the time domain resources in the first time interval.

[0340] In some embodiments, the second time domain resource in the first time interval does not overlap with the first time domain resource in the first time interval, and the first time domain resource is used by the positioning module of the terminal device to obtain the synchronization information.

[0341] In some embodiments, the synchronization information includes a TA value corresponding to the uplink timing synchronization of the terminal device; and the length of the first time interval satisfies at least one of the following characteristics:

[0342] The length of the first time interval is greater than or equal to the timing offset length corresponding to the TA value;

[0343] The length of the first time interval is greater than or equal to the timing offset length corresponding to the maximum value of the TA value;

[0344] The length of the first time interval is greater than or equal to the length corresponding to the round-trip transmission time between the terminal device and the network device.

[0345] Those skilled in the art should understand that the relevant description of the above-mentioned synchronization device in the embodiment of the present application can be understood by referring to the relevant description of the synchronization method in the embodiment of the present application.

[0346] Fig.18 1 is a schematic structural diagram of a communication device 1800 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. Fig.18 The communication device 1800 shown includes a processor 1810, and the processor 1810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0347] Alternatively, if Fig.18 As shown, the communication device 1800 may further include a memory 1820. The processor 1810 may call and run a computer program from the memory 1820 to implement the method in the embodiment of the present application.

[0348] The memory 1820 may be a separate device independent of the processor 1810 , or may be integrated into the processor 1810 .

[0349] Alternatively, if Fig.18 As shown, the communication device 1800 may further include a transceiver 1830, and the processor 1810 may control the transceiver 1830 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0350] The transceiver 1830 may include a transmitter and a receiver. The transceiver 1830 may further include an antenna, and the number of antennas may be one or more.

[0351] Optionally, the communication device 1800 may specifically be a network device of an embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0352] Optionally, the communication device 1800 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0353] Fig.19 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.19 The chip 1900 shown includes a processor 1910, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0354] Alternatively, if Fig.19 As shown, the chip 1900 may further include a memory 1920. The processor 1910 may call and run a computer program from the memory 1920 to implement the method in the embodiment of the present application.

[0355] The memory 1920 may be a separate device independent of the processor 1910 , or may be integrated into the processor 1910 .

[0356] Optionally, the chip 1900 may further include an input interface 1930. The processor 1910 may control the input interface 1930 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0357] Optionally, the chip 1900 may further include an output interface 1940. The processor 1910 may control the output interface 840 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0358] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0359] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0360] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0361] Fig. 20 2 is a schematic block diagram of a communication system 2000 provided in an embodiment of the present application. Fig. 20 As shown, the communication system 2000 includes a terminal device 2010 and a network device 2020 .

[0362] Among them, the terminal device 2010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2020 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0363] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0364] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0365] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0366] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0367] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0368] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0369] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0370] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0371] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0372] The embodiment of the present application also provides a computer program.

[0373] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0374] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0375] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0376] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0377] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0378] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0379] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0380] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0381] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A synchronization method, the method comprising: The terminal device determines a first time interval, where the first time interval is used for the terminal device to acquire synchronization information; The terminal device obtains the synchronization information based on the first time interval, and the synchronization information is used to transmit a first physical channel or signal.

2. The method according to claim 1, wherein: The first physical channel or signal includes an uplink physical channel or an uplink reference signal, and the synchronization information is used to send the first physical channel or signal.

3. The method according to claim 2, wherein: The first physical channel or signal includes at least one of the following: Physical random access channel PRACH, message 3 during random access, physical uplink shared channel PUSCH, physical uplink control channel PUCCH, advance data transmission EDT, and transmission based on pre-configured uplink resources PUR.

4. The method according to any one of claims 1 to 3, wherein: At least part of the time domain resources in the first time interval are not used for the communication module of the terminal device to send and receive; and / or, At least part of the time domain resources in the first time interval are used for searching by the positioning module of the terminal device; and / or, At least part of the time domain resources in the first time interval are used by the communication module of the terminal device to receive system messages and / or downlink reference signals sent by the network device; and / or, At least part of the time domain resources in the first time interval is used for the terminal device to perform TA adjustment.

5. The method according to any one of claims 1 to 4, wherein: The synchronization information includes a timing advance TA value corresponding to the uplink timing synchronization of the terminal device; The terminal device performs TA adjustment based on the first time interval and the TA value.

6. The method according to any one of claims 1 to 5, wherein: The starting position of the first time interval is predefined; or, The starting position of the first time interval is determined according to a predefined rule; or, The starting position of the first time interval is obtained according to configuration information of the network device.

7. The method according to claim 6, wherein: The configuration information of the network device is transmitted by at least one of the following information: System messages, paging messages, WUS, radio resource control RRC signaling, media access control MAC control element CE and downlink control information DCI.

8. The method according to any one of claims 1 to 7, wherein: The first time interval has a second association relationship with second information, and the second information includes at least one of the following: Satellite scenarios, terminal device capabilities, and coverage enhancement levels.

9. The method according to claim 8, wherein: The second information includes terminal device capabilities, and the second association relationship includes: The length of the first time interval is determined according to the capability of the terminal device; or, The length of the first time interval is configured by the network device according to the capability of the terminal device.

10. A synchronization method, the method comprising: The network device sends configuration information of a first time interval to the terminal device, where the first time interval is used for the terminal device to obtain synchronization information, and the synchronization information is used for the terminal device to transmit a first physical channel or signal.

11. The method according to claim 10, wherein: The first time interval has a second association relationship with second information, and the second information includes at least one of the following: Satellite scenarios, terminal device capabilities, and coverage enhancement levels.

12. The method according to claim 10 or 11, wherein: The configuration information of the first time interval is transmitted by at least one of the following information: System messages, paging messages, WUS, RRC signaling, MAC CE and downlink control information DCI.

13. The method according to any one of claims 10 to 12, wherein: The first time domain resources in the first time interval are used by the positioning module of the terminal device to obtain the synchronization information, wherein the first time domain resources are at least part of the time domain resources in the first time interval.

14. The method according to claim 13, wherein: The first time domain resource is not used for sending and receiving by the communication module of the terminal device.

15. The method according to any one of claims 10 to 14, wherein: The synchronization information includes a TA value corresponding to the uplink timing synchronization of the terminal device; the length of the first time interval satisfies at least one of the following characteristics: The length of the first time interval is greater than or equal to the timing offset length corresponding to the TA value; The length of the first time interval is greater than or equal to the timing offset length corresponding to the maximum value of the TA value; The length of the first time interval is greater than or equal to the length corresponding to the round-trip transmission time between the terminal device and the network device.

16. A synchronization device, applied to a terminal device, the device comprising: A determining unit, configured to determine a first time interval, where the first time interval is used for the terminal device to acquire synchronization information; An acquisition unit is used to acquire the synchronization information based on the first time interval, where the synchronization information is used to transmit a first physical channel or signal.

17. A synchronization device, applied to a network device, comprising: A sending unit is used to send configuration information of a first time interval to a terminal device, where the first time interval is used for the terminal device to obtain synchronization information, and the synchronization information is used for the terminal device to transmit a first physical channel or signal.

18. A terminal device, comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 1 to 9.

19. A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 10 to 15.

20. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 9.

21. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 10 to 15.

22. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 9.

23. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 10 to 15.

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