Method, terminal device and network device for transmitting common time advance TA

Abstract

A method for transmitting a common time advance TA, a terminal device and a network device, the method comprising: the terminal device updates a system message including a first system information block SIB according to a first update cycle, wherein the first update cycle and a second update cycle are different, the second update cycle is a cycle for updating a system message including a second SIB, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and specifically to a method for transmitting a common time advance TA, a terminal device, and a network device. Background Art

[0002] In uplink transmission, in order to ensure the orthogonality of uplink transmission and avoid intra-cell interference, the network requires that the time when signals from different terminals at the same time but with different frequency domain resources arrive at the network is basically aligned. In order to ensure time synchronization on the network side, the uplink timing advance (TA) mechanism is introduced. The network device can notify the terminal device of the TA for uplink transmission, and the terminal device can perform uplink transmission based on the TA.

[0003] In the New Radio (NR) system, satellite communication is considered to provide communication services to users. Since the satellite moves at high speed, the signal transmission delay between the satellite and the terminal will change frequently. In this case, how the network equipment notifies the TA for uplink transmission of the terminal device is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a method, terminal device and network device for transmitting a common time advance TA, which are helpful in meeting the requirements for the update frequency of the common TA in different scenarios.

[0005] In a first aspect, a method for transmitting a common time advance TA is provided, comprising: a terminal device updates a system message including a first system information block SIB according to a first update period, wherein the first update period and a second update period are different, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0006] According to a second aspect, a method for transmitting a common time advance TA is provided, comprising: a network device updates a system message including a first system information block SIB according to a first update period, wherein the first update period and the second update period are different, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0007] According to a third aspect, a method for transmitting a common time advance TA is provided, comprising: a terminal device determines whether a system message including a first system information block SIB is updated according to whether a received short message includes a first indication field or content indicated by the first indication field; wherein the short message includes a second indication field, the second indication field is used to indicate whether the system message including a second SIB is updated, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0008] In a fourth aspect, a method for transmitting a common time advance TA is provided, comprising: a network device sends a short message to a terminal device, whether the short message includes a first indication field or the content indicated by the first indication field is used by the terminal device to determine whether a system message including a first system information block SIB is updated; wherein the short message includes a second indication field, the second indication field is used to indicate whether a system message including a second SIB is updated, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0009] In a fifth aspect, a terminal device is provided, which is used to execute the method in the first aspect or the third aspect or any implementation thereof. Specifically, the terminal device includes a unit for executing the method in the first aspect or the third aspect or any implementation thereof.

[0010] In a sixth aspect, a network device is provided, which is used to execute the method in the second aspect or the fourth aspect or any implementation thereof. Specifically, the network device includes a unit for executing the method in the second aspect or the fourth aspect or any implementation thereof.

[0011] In a seventh aspect, a terminal device is provided, the terminal device comprising: 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 method in the first aspect or the third aspect or each implementation thereof.

[0012] In an eighth aspect, a network device is provided, the network device comprising: 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 method in the second aspect or the fourth aspect or each implementation thereof.

[0013] In a ninth aspect, a chip is provided for implementing the method in any one of the first to fourth aspects or its respective implementations. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method in any one of the first to fourth aspects or its respective implementations.

[0014] In a tenth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method of any one of the first to fourth aspects or any of its implementations.

[0015] In an eleventh aspect, a computer program product is provided, comprising computer program instructions, which enable a computer to execute the method in any one of the first to fourth aspects or any of their implementations.

[0016] In a twelfth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to fourth aspects or in each of its implementations.

[0017] Based on the above technical solution, the terminal device can use different update cycles to update the system information including the first public TA and the system information excluding the first public TA, which is conducive to meeting the requirements for the update frequency of the public TA in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figures 1 to 3 It is a schematic diagram of the application scenario provided by the embodiment of the present application.

[0019] Figure 4 and Figure 5 They are schematic diagrams of NTN scenarios based on transparent data satellite and regenerated data satellite respectively.

[0020] Figure 6 and Figure 7 Schematic diagrams of uplink transmission without setting TA and with setting TA respectively.

[0021] Figure 8 and Fig. 9 It is a schematic diagram of the TA determination method based on two NTN scenarios of transparent data satellite and regeneration data satellite.

[0022] Fig.10 It is a schematic diagram of a method for transmitting a common time advance TA provided in an embodiment of the present application.

[0023] Figure 11 to Figure 12 It is a schematic diagram of two specific implementation methods of transmitting a common TA.

[0024] Fig.13 It is a schematic diagram of another method for transmitting a common time advance TA provided in an embodiment of the present application.

[0025] Fig.14 It is a schematic diagram of a specific implementation method of transmitting a common TA.

[0026] Fig.15 It is a schematic block diagram of a terminal device provided in an embodiment of the present application.

[0027] Fig.16 It is a schematic block diagram of a network device provided in an embodiment of the present application.

[0028] Fig.17 It is a schematic block diagram of a terminal device provided in another embodiment of the present application.

[0029] Fig.18 It is a schematic block diagram of a network device provided by another embodiment of the present application.

[0030] Fig.19 It is a schematic block diagram of a communication device provided in another embodiment of the present application.

[0031] Fig. 20 It is a schematic block diagram of a chip provided in an embodiment of the present application.

[0032] Fig.21 It is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] 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. For 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.

[0034] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0035] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0036] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0037] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0038] Optionally, the embodiments of the present application may be applied to non-terrestrial communication networks (NTN) systems, and may also be applied to terrestrial communication networks (TN) systems.

[0039] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0040] The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, 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 next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0041] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).

[0042] In the embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, or a wireless terminal device in smart home, etc. The terminal device involved in the embodiment of the present application may also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE device, etc. The terminal device may also be fixed or mobile.

[0043] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0044] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0045] As an example but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0046] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0047] For example, Figure 1 The following is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. Figure 1 As shown, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located in the coverage area.

[0048] Figure 1One network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0049] For example, Figure 2 This is a schematic diagram of another communication system architecture provided in an embodiment of the present application. Figure 2 , including a terminal device 1101 and a satellite 1102, the terminal device 1101 and the satellite 1102 can communicate wirelessly. The network formed between the terminal device 1101 and the satellite 1102 can also be called NTN. Figure 2 In 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. Optionally, 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 embodiment of the present application.

[0050] For example, Figure 3 This is a schematic diagram of another communication system architecture provided in an embodiment of the present application. Figure 3 , including terminal equipment 1201, satellite 1202 and base station 1203, terminal equipment 1201 and satellite 1202 can communicate wirelessly, and satellite 1202 and base station 1203 can communicate. The network formed by terminal equipment 1201, satellite 1202 and base station 1203 can also be called NTN. Figure 3 In the architecture of the communication system shown, 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. Optionally, 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 embodiment of the present application.

[0051] It should be noted that Figure 1-Figure 3 The system to which the present application is applicable is only illustrated 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, such as 5G communication system, LTE communication system, etc., and the embodiment of the present application does not make specific limitations on this.

[0052] Optionally, Figure 1-Figure 3The wireless communication system shown may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but this is not limited in the embodiments of the present application.

[0053] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0054] It should be understood that 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 associated objects, indicating that three relationships can exist. 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.

[0055] It should be understood that the "indication" mentioned in the embodiments 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, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0056] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0057] In the embodiments of the present application, "pre-definition" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to definition in a protocol.

[0058] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0059] Satellites can be divided into two types based on the functions they provide: transparent data (payload) and regenerative data. 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 signals 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.

[0060] Figure 4 and Figure 5 Schematic diagrams of NTN scenarios based on transparent payload satellites and regenerated payload satellites are shown respectively. Among them, the NTN network may include one or more gateways (Gateway) for communication between satellites and terminals. For NTN scenarios based on transparent payload satellites, the gateway and the satellite communicate through a feeder link (Feeder link), and the satellite and the terminal can communicate through a service link (service link). For NTN scenarios based on regenerated payload satellites, satellites communicate with each other through an interstar link (InterStar link), the gateway and the satellite communicate through a feeder link (Feeder link), and the satellite and the terminal can communicate through a service link (service link).

[0061] In uplink transmission, in order to ensure the orthogonality of uplink transmission and avoid intra-cell interference, the network requires that the time when signals from different UEs at the same time but with different frequency domain resources arrive at the network is basically aligned. In order to ensure time synchronization on the network side, the uplink timing advance (TA) mechanism is introduced.

[0062] The uplink clock and downlink clock on the network side are the same, while there is an offset between the uplink clock and downlink clock on the UE side, and different UEs have different uplink timing advances. The network can control the time when uplink signals from different UEs reach the network by properly controlling the offset of each UE. For UEs far away from the network, due to the large transmission delay, uplink data must be sent earlier than UEs closer to the network.

[0063] Figure 6 and Figure 7 Schematic diagrams of time transmission without and with TA are shown respectively. Figure 7 It can be seen that by configuring corresponding TAs for different UEs, time synchronization on the network side can be achieved.

[0064] In the NTN scenario, due to the large signal transmission delay between the terminal and the network, in order to facilitate the terminal to complete the initial random access, the network can determine a common TA based on the signal transmission delay between the near-site location and the base station.

[0065] For NTN scenarios based on regenerative payload satellites, such as Figure 8 As shown, the common TA = 2*D0 / c, which can be determined by the signal transmission delay between the reference point and the satellite. For the NTN scenario based on transparent payload, Fig. 9 As shown, the common TA=2*(D01+D02) / c, that is, it can be determined according to the signal transmission delay between the reference point and the gateway and the satellite, where c represents the speed of light.

[0066] Since the satellite moves at high speed, the signal transmission delay between the satellite and the UE will change frequently. In this case, how the network equipment notifies the public TA for uplink transmission of the terminal equipment is an urgent problem to be solved.

[0067] Fig.10 FIG. 2 is a schematic flow chart of a method 200 for transmitting a common timing advance TA provided in an embodiment of the present application. Fig.10 As shown, the method 200 may include at least part of the following:

[0068] S201, a network device updates a system message including a first system information block (System Information Block, SIB) according to a first update period;

[0069] S202: The terminal device updates the system message including the first SIB according to the first update cycle.

[0070] In the embodiment of the present application, the first update period is different from the second update period, the second update period is an update period of a system message including a second SIB, the first SIB includes a first common TA, and the second SIB does not include the first common TA. That is, the terminal device uses different update periods to update the system message including the first common TA and the system message not including the first common TA.

[0071] Optionally, in an embodiment of the present application, the first SIB may be any SIB in a system message, such as SIB1 or SIB2, and the second SIB may also be any SIB in a system message, such as SIB1 or SIB2.

[0072] In the embodiment of the present application, for the convenience of distinction and description, the system message including the first public TA is recorded as the first system message, and the system message not including the first public TA is recorded as the second system message.

[0073] It should be understood that in the embodiment of the present application, the network device updates the first system message according to (or using) the first update period, which means that the network device can update the first system message in the first update period, but does not mean that the network device updates the first system message in each first update period. Correspondingly, the terminal device updates the first system message according to (or using) the first update period, which means that the terminal device can update the first system message in the first update period, but does not mean that the terminal device updates the first system message in each first update period.

[0074] In a specific embodiment, the network device may send an update indication of the first system message within a first update cycle, and further update the first system message within a next first update cycle. Correspondingly, if the terminal device receives an update indication of the first system message within a first update cycle, it may receive the updated first system message within the next first update cycle.

[0075] It should be understood that the embodiment of the present application does not limit the sending method of the first system message in the first update period. For example, the first system message may be sent only once in the first update period, or may be sent repeatedly periodically.

[0076] The first SIB including the first common TA may be any SIB in the system message including the first common TA, for example, SIB1 includes the first common TA. Further, if there is a SIB in the system message including the first common TA, the system message may be considered as the first system message.

[0077] The second SIB not including the first common TA may be that any SIB in the system message does not include the first common TA. Further, if any SIB in the system message does not include the first common TA, the system message may be considered as the second system message.

[0078] It should be understood that in an embodiment of the present application, the first public TA can be included in the SIB of the system message, or can also be included in other system information blocks in the system message. The following is only explained by taking the first public TA carried by SIB as an example, but the embodiment of the present application is not limited to this.

[0079] In some embodiments of the present application, the first public TA is a public TA used for a non-terrestrial network NTN.

[0080] Optionally, the first public TA corresponds to a cell, or a beam, or may also correspond to other service units, that is, terminal devices within a cell can share a TA, or terminals within the coverage of a beam can share a TA.

[0081] In some embodiments of the present application, the first update period is smaller than the second update period.

[0082] That is, the updating frequency of the system message for updating the first public TA is higher, and the updating frequency of the system message for updating other system information is relatively low, which can be applicable to the requirements of the NTN network that needs to frequently update the public TA.

[0083] Optionally, in some other embodiments, the first update period is greater than the second update period, which may be applicable to a scenario where the public TA does not change frequently.

[0084] It should be understood that the embodiments of the present application can be applicable to any scenario where the update frequency of the public TA is inconsistent with the update frequency of other system information. The following is an example in which the update frequency of the public TA is higher than the update frequency of other system messages, but the present application is not limited to this.

[0085] In some embodiments of the present application, the method 200 further includes:

[0086] The terminal device determines the first update period according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

[0087] For example, the terminal device may use the product of the first update cycle coefficient and the reference cycle as the first update cycle, and use the product of the second update cycle coefficient and the reference cycle as the second update cycle.

[0088] In some embodiments, the first update period coefficient is less than the second update period coefficient.

[0089] In some embodiments, the reference cycle is a default paging cycle (defaultPagingCycle).

[0090] Optionally, the first update period coefficient and the second update period coefficient may be configured via a system message.

[0091] Optionally, the first update period coefficient and the second update period coefficient may be configured through the same system message as the first common TA, or may be configured through different system messages.

[0092] In some embodiments of the present application, whether the first system message including the first public TA is updated and whether the second system message not including the first public TA is updated may be indicated by different messages.

[0093] As an embodiment, different short messages may be used to indicate whether the first system message is updated and whether the second system message is updated.

[0094] For example, whether the first system message is updated is indicated by a first short message, and whether the second system message is updated is indicated by a second short message.

[0095] In some specific embodiments, the first short message includes a system information update (systemInfoModification) field, and the system information update field is used to indicate whether the first system message is updated.

[0096] In some specific embodiments, the second short message includes a system information update (systemInfoModification) field, and the system information update field is used to indicate whether the second system information is updated.

[0097] In some embodiments, the terminal device can monitor the first short message at the paging occasion (Paging Occasion, PO) of the terminal device in each discontinuous reception (DRX) cycle. This monitoring method can be applicable to terminal devices in a non-connected state (for example, a radio resource control (RRC) idle (IDLE) state or an RRC inactive (INACTIVE) state).

[0098] In other embodiments, the terminal device may monitor the first short message at least once on any PO within each first update period. This method may be applicable to a terminal device in a connected state (eg, RRCL connected (CONNECTED) state).

[0099] In an embodiment of the present application, PO is composed of a series of physical downlink control channel (PDCCH) monitoring opportunities, wherein each PDCCH monitoring opportunity may include one or more time slots. In a DRX cycle, the terminal device may monitor the PDCCH on the PO on the paging radio frame (PF). PF may refer to a radio frame, for example, a fixed 10ms, which may contain one or more POs, or the starting position of one or more POs.

[0100] The PF and PO of the PDCCH monitored by the terminal device in a DRX cycle can be determined as follows.

[0101] For example, the PF system frame number (SFN) is determined by the following formula:

[0102] (SFN+PF_offset)mod T=(T / N)*(UE_ID mod N)

[0103] The index (i_s) of a PO in a PF is determined by the following formula:

[0104] i_s=floor(UE_ID / N)mod Ns

[0105] Wherein, T represents the DRX cycle of the terminal device receiving the paging message. In some implementations, the network may broadcast a default DRX cycle. If the upper layer of the network device, for example, the RRC layer, configures a UE-specific DRX cycle for the UE, the UE may use the minimum of the DRX cycle broadcast by the network and the UE-specific DRX cycle configured by the upper layer as the DRX cycle of the UE. If the upper layer of the network device does not configure a UE-specific DRX cycle for the UE, the UE may use the DRX cycle broadcast by the network as the DRX cycle of the UE.

[0106] N represents the number of PFs included in a DRX cycle;

[0107] Ns represents the number of POs contained in a PF;

[0108] PF_offset represents a time domain offset used to determine PF;

[0109] UE_ID, for example, can be 5G-S-TMSI mod 1024, where 5G-S-TMSI is the 5G shortened temporary mobile user identity (Temporary Mobile Subscriber Identity, TMSI).

[0110] It should be understood that in the embodiment of the present application, the first short message and the second short message can be distinguished by the sending method of the short messages.

[0111] As an example, the first short message and the second short message correspond to different paging radio network temporary identifiers (Paging Radio Network Temporary Identity, P-RNTI).

[0112] As an example, the first short message and the second short message correspond to different paging search spaces.

[0113] As an example, the first short message and the second short message correspond to different control resource sets (Control Resource Sets).

[0114] As an example, the first short message and the second short message correspond to different PDCCH monitoring opportunities.

[0115] In some embodiments of the present application, if the terminal device receives the first short message within the first update period P, and the first short message indicates an update of the first system message, the terminal device receives (or reads) the updated first system message within the next first update period (i.e., the first update period P+1).

[0116] In other embodiments of the present application, if the terminal device receives the second short message within the second update cycle Q, and the second short message indicates that the second system message is updated, the terminal device receives (or reads) the updated second system message within the next second update cycle (i.e., the second update cycle Q+1).

[0117] In some other embodiments of the present application, whether the first system message including the first public TA is updated and whether the second system message not including the first public TA is updated can be indicated by the same message, for example, by the same short message, such as the third short message.

[0118] As an example, the third short message includes a first indication field and a second indication field, the first indication field is used to indicate whether the first system message is updated, and the second indication field is used to indicate whether the second system message is updated.

[0119] Optionally, the first indication field may include at least one bit, and different values ​​of the at least one bit indicate whether the first system message is updated, and the second indication field may include at least one bit, and different values ​​of the at least one bit indicate whether the first system message is updated.

[0120] In this case, the terminal device can monitor the third short message on the PO of the terminal device in each DRX cycle, and this method can be applicable to a terminal device in a non-connected state. Alternatively, the terminal device can monitor the third short message at least once on any PO in each first update cycle, and this method can be applicable to a terminal device in a connected state.

[0121] Optionally, if the terminal device receives the third short message within the first update cycle K, and the first indication field in the third short message indicates a first system message update, the terminal device receives the updated first system message within the next first update cycle (ie, the first update cycle K+1).

[0122] Optionally, if the terminal device receives the third short message within the second update cycle X, and the second indication field in the third short message indicates a second system message update, the terminal device receives the updated second system message within the next second update cycle (ie, the second update cycle X+1).

[0123] The following, combined Fig.11 and Fig.12 , explaining the specific implementation process.

[0124] In an embodiment of the present application, a terminal device receives a system message sent by a network device, where the system message is used to configure at least one of the following information:

[0125] System Information (SI) scheduling list, including the mapping relationship between SIB and SI messages, SI window length, etc.

[0126] Two system message update period coefficients, namely, a first update period coefficient and a second update period coefficient, are respectively denoted as modificationPeriodCoeff1 and modificationPeriodCoeff2;

[0127] Default paging cycle.

[0128] Wherein, modificationPeriodCoef1 is used to determine the update period of the first system message, that is, the update period of the system message including the first public TA, and modificationPeriodCoeff2 is used to determine the update period of the second system message, that is, the update period of the system message not including the first public TA. <modificationPeriodCoeff2。

[0129] In some embodiments, the first update period T1 = modificationPeriodCoeff1 * defaultPagingCycle, that is, the second update period T2 = modificationPeriodCoeff2 * defaultPagingCycle.

[0130] exist Fig.11In the illustrated embodiment, the first short message and the second short message respectively indicate whether the first system message is updated and include whether the second system message is updated.

[0131] The actions of the terminal device monitoring the first short message and the second short message are as follows:

[0132] A terminal device in an RRC IDLE state or an RRC INACTIVE state listens to a second short message on the PO of the terminal device in each DRX cycle to obtain a system message update indication.

[0133] The terminal device in the RRC CONNEXTED state listens to the second short message at least once on any PO within each second update period to obtain the system message update indication.

[0134] A terminal device in an RRC IDLE state or an RRC INACTIVE state listens to the first short message on the PO of the terminal device in each DRX cycle to obtain a system message update indication.

[0135] The terminal device in the RRC CONNEXTED state monitors the system message update indication of the first short message at least once on any PO within each first update period.

[0136] Optionally, in this embodiment, the first short message and the second short message may correspond to different P-RNTIs, or correspond to different paging search spaces, or correspond to different ControlResourceSets, or correspond to different PDCCH monitoring opportunities.

[0137] like Fig.11 As shown, if the terminal device receives a first short message in the first update cycle N, indicating that the first system message is updated, the terminal device reads the updated first system message in its corresponding next first update cycle (i.e., the first update cycle N+1) to obtain the updated first public TA. Alternatively, if the terminal device receives a second short message in the second update cycle M, indicating that the second system message is updated, the terminal device reads the updated second system message in its corresponding next second update cycle (i.e., the second update cycle M+1).

[0138] exist Fig.12 In the illustrated embodiment, whether the first system message is updated and whether the second system message is updated is indicated by a third short message.

[0139] The behavior of the terminal device monitoring the third short message is as follows:

[0140] A terminal device in an RRC IDLE state or an RRC INACTIVE state listens to a third short message on the PO of the terminal device in each DRX cycle to obtain an update indication of the first system message and an update indication of the second system message.

[0141] The terminal device in the RRC CONNEXTED state listens to the third short message at least once on any PO within each first update period to obtain the update indication of the first system message and the update indication of the second system message.

[0142] If the terminal device receives a third short message in the first update cycle N indicating that the first system message is updated, the terminal device reads the updated first system message in its corresponding next first update cycle (ie, first update cycle N+1) to obtain the updated first public TA.

[0143] If the terminal device receives a third short message in the second update period M indicating that the second system message is updated, the terminal device reads the updated second system message in its corresponding next second update period (ie, second update period M+1).

[0144] Therefore, the terminal device can use different update cycles to update the system information including the first public TA and the system information not including the first public TA, which is conducive to meeting the requirements for the update frequency of the public TA in different scenarios.

[0145] Fig.13 FIG. 3 is a schematic flow chart of another method 300 for transmitting a common timing advance TA provided in an embodiment of the present application. Fig.13 As shown, the method 300 may include at least part of the following:

[0146] S301, the network device sends a short message to the terminal device;

[0147] S302, the terminal device determines whether the system message including the first system information block SIB is updated according to whether the received short message includes the first indication field or the content indicated by the first indication field;

[0148] The short message includes a second indication field, where the second indication field is used to indicate whether a system message including a second SIB is updated, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0149] In some embodiments of the present application, the first public TA is a public TA used for a non-terrestrial network NTN.

[0150] Optionally, the first public TA corresponds to a cell, or a beam, or may also correspond to other service units, that is, terminal devices within a cell can share a TA, or terminals within the coverage of a beam can share a TA.

[0151] Optionally, in an embodiment of the present application, the first SIB may be any SIB in a system message, such as SIB1 or SIB2, and the second SIB may also be any SIB in a system message, such as SIB1 or SIB2.

[0152] It should be understood that in an embodiment of the present application, the first public TA can be included in the SIB of the system message, or can also be included in other system information blocks in the system message. The following is only explained by taking the first public TA carried by SIB as an example, but the embodiment of the present application is not limited to this.

[0153] In the embodiment of the present application, for the convenience of distinction and description, the system message including the first public TA is recorded as the first system message, and the system message not including the first public TA is recorded as the second system message.

[0154] In this embodiment, the system message sent by the network device may include the first common TA or may not include the common TA, that is, the network device may broadcast the first system message or the second system message.

[0155] In the embodiment of the present application, the network device may indicate whether the first system message is updated and whether the second system message is updated through a short message.

[0156] In some embodiments, whether the first system message is updated can be indicated by whether the short message includes a first indication field. For example, the short message includes the first indication field to indicate that the first system message is updated, and the short message does not include the first indication field to indicate that the first system message is not updated.

[0157] In some other embodiments, the content indicated by the first indication field in the short message may indicate whether the first system message is updated. For example, if the first indication field indicates that the first system message is updated, it is determined that the first system message is updated, or if the first indication field indicates that the first system message is not updated, it is determined that the first system message is not updated.

[0158] If the terminal device determines that the first system message is updated, the terminal device immediately reads the updated first system message to obtain the first public TA without waiting for the next update cycle to read the updated first system message, thereby enabling timely update of the first public TA.

[0159] If it is determined that the second system message is updated, the terminal device reads the updated second system message in the next update cycle.

[0160] The following, combined Fig.13 , explaining the specific implementation process.

[0161] In this embodiment, the terminal device receives a system message sent by the network device, where the system message is used to configure at least one of the following information:

[0162] System Information (SI) scheduling list, including the mapping relationship between SIB and SI messages, SI window length, etc.

[0163] A system message update period coefficient, denoted as modificationPeriodCoeff;

[0164] Default paging cycle (defaultPagingCycle).

[0165] Among them, modificationPeriodCoef is used to determine the update period of the second system message, which is recorded as T2.

[0166] The behavior of the terminal device monitoring short messages is as follows:

[0167] A terminal device in an RRC IDLE state or an RRC INACTIVE state listens to short messages on the PO of the terminal device in each DRX cycle to obtain an update indication of the first system message.

[0168] A terminal device in the RRC CONNEXTED state listens to a short message at least once on any PO within each default paging cycle to obtain an update indication of the first system message.

[0169] If the terminal device receives a short message at time t1, the short message includes a first indication field and a second indication field, and the terminal device determines that the first system message is updated according to the first indication field. Further, the terminal device immediately reads the updated first system message, obtains the updated first SIB, and thus obtains the first common TA. If the terminal device receives a short message in update cycle M, the short message includes a second indication field, and determines that the second system message is updated according to the second indication field. Further, the terminal device reads the updated second system message in the next update cycle (i.e., update cycle M+1).

[0170] Therefore, in this embodiment, when the terminal device determines that the first system message including the first public TA is updated, it immediately reads the updated first system message instead of waiting until the next system message update cycle to read the updated first system message, which is conducive to timely and rapid update of the first public TA.

[0171] Combination of the above Figures 10 to 14 , describes in detail the method embodiment of the present application, and the following is combined with Figures 15 to 21 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0172] Fig.15 FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. Fig.15 As shown, the terminal device 400 includes:

[0173] The processing unit 410 is used to update the system message including the first system information block SIB according to the first update period, wherein the first update period and the second update period are different, the second update period is a period for updating the system message including the second SIB, the first SIB includes the first common TA, and the second SIB does not include the first common TA.

[0174] Optionally, in some embodiments, the first update period is smaller than the second update period.

[0175] Optionally, in some embodiments, the processing unit 410 is further configured to:

[0176] The first update period is determined according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

[0177] Optionally, in some embodiments, the first update period coefficient and the second update period coefficient are configured through a system message.

[0178] Optionally, in some embodiments, the first update period coefficient is smaller than the second update period coefficient.

[0179] Optionally, in some embodiments, the reference cycle is a default paging cycle.

[0180] Optionally, in some embodiments, the processing unit 410 is further used to: determine whether the system message including the first SIB is updated based on a first short message, wherein the first short message and the second short message are different, and the second short message is used to determine whether the system message including the second SIB is updated.

[0181] Optionally, in some embodiments, the terminal device further includes:

[0182] A communication unit, configured to monitor the first short message on a paging monitoring opportunity PO of the terminal device in each non-connected reception DRX cycle, wherein the terminal device is in a non-connected state; or

[0183] The first short message is monitored at least once on any PO in each first update cycle, wherein the terminal device is in a connected state.

[0184] Optionally, in some embodiments, the first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or

[0185] The first short message and the second short message correspond to different paging search spaces; or

[0186] The first short message and the second short message correspond to different control resource sets; or

[0187] The first short message and the second short message correspond to different PDCCH monitoring opportunities.

[0188] Optionally, in some embodiments, the terminal device further includes:

[0189] A communication unit is configured to receive the first short message within a first update period P, and when the first short message indicates a system message update including the first SIB, receive an updated system message including the first SIB within a first update period P+1.

[0190] Optionally, in some embodiments, the processing unit 410 is further configured to:

[0191] Determine whether the system message including the first SIB is updated according to the first indication field in the third short message, wherein the third short message also includes a second indication field, and the second indication field is used to determine whether the system message including the second SIB is updated.

[0192] Optionally, in some embodiments, the terminal device further includes:

[0193] a communication unit, configured to monitor the third short message on a paging occasion PO of the terminal device in each DRX cycle, wherein the terminal device is in a non-connected state; or

[0194] The third short message is monitored at least once on any PO in each first update cycle, wherein the terminal device is in a connected state.

[0195] Optionally, in some embodiments, the terminal device further includes:

[0196] A communication unit is configured to receive the third short message within a first update period K, and if the first indication field in the third short message indicates a system message update including the first SIB, receive an updated system message including the first SIB within a first update period K+1.

[0197] Optionally, in some embodiments, the first public TA is a public TA for a non-terrestrial network NTN.

[0198] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0199] It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 400 are respectively to implement Figures 10 to 12 For the sake of brevity, the corresponding process of the terminal device in the method 200 is not repeated here.

[0200] Fig.16 It is a schematic block diagram of a network device according to an embodiment of the present application. Fig.16 The network device 500 includes:

[0201] The processing unit 510 is used to update the system message including the first system information block SIB according to the first update period, wherein the first update period and the second update period are different, the second update period is a period for updating the system message including the second SIB, the first SIB includes the first common TA, and the second SIB does not include the first common TA.

[0202] Optionally, in some embodiments, the first update period is smaller than the second update period.

[0203] Optionally, in some embodiments, the processing unit 510 is further configured to:

[0204] The first update period is determined according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

[0205] Optionally, in some embodiments, the first update period coefficient and the second update period coefficient are configured through a system message.

[0206] Optionally, in some embodiments, the first update period coefficient is smaller than the second update period coefficient.

[0207] Optionally, in some embodiments, the reference cycle is a default paging cycle.

[0208] Optionally, in some embodiments, the network device indicates whether the system message including the first SIB is updated through a first short message, wherein the first short message and the second short message are different, and the second short message is used to indicate whether the system message including the second SIB is updated.

[0209] Optionally, in some embodiments, the first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or

[0210] The first short message and the second short message correspond to different paging search spaces; or

[0211] The first short message and the second short message correspond to different control resource sets; or

[0212] The first short message and the second short message correspond to different PDCCH monitoring opportunities.

[0213] Optionally, in some embodiments, the network device indicates whether the system message including the first SIB is updated through a first indication field in a third short message, wherein the third short message also includes a second indication field, and the second indication field is used to determine whether the system message including the second SIB is updated.

[0214] Optionally, in some embodiments, the first public TA is a public TA for a non-terrestrial network NTN.

[0215] Optionally, in some embodiments, the processing unit may be one or more processors.

[0216] It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 500 are respectively to implement Figures 10 to 12 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described in detail here.

[0217] Fig.17 FIG. 6 shows a schematic block diagram of a terminal device 600 according to another embodiment of the present application. Fig.17 As shown, the terminal device 600 includes: a processing unit 610, configured to determine whether a system message including a first system information block SIB is updated according to whether the received short message includes a first indication field or content indicated by the first indication field;

[0218] The short message includes a second indication field, where the second indication field is used to indicate whether a system message including a second SIB is updated, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0219] Optionally, in some embodiments, the processing unit 610 is specifically configured to:

[0220] In a case where the short message includes a first indication field, determining a system message update including a first SIB; or

[0221] In a case where the short message includes a first indication field, and the first indication field indicates a system message update including the first SIB, it is determined that the system message update includes the first SIB.

[0222] Optionally, in some embodiments, the terminal device 600 further includes: a communication unit, which, when the system message including the first SIB is updated, immediately reads the updated system message including the first SIB.

[0223] Optionally, in some embodiments, the first public TA is a public TA for a non-terrestrial network NTN.

[0224] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0225] It should be understood that the terminal device 600 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 600 are respectively to implement Figure 13 to Figure 14 For the sake of brevity, the corresponding process of the terminal device in the method 300 is not repeated here.

[0226] Fig.18 is a schematic block diagram of a network device according to another embodiment of the present application. Fig.18 The network device 700 includes:

[0227] A communication unit 710 is configured to send a short message to a terminal device, wherein whether the short message includes a first indication field or the content indicated by the first indication field is used by the terminal device to determine whether a system message including a first system information block SIB is updated;

[0228] The short message includes a second indication field, where the second indication field is used to indicate whether a system message including a second SIB is updated, the first SIB includes a first common TA, and the second SIB does not include the first common TA.

[0229] Optionally, in some embodiments, the first public TA is a public TA for a non-terrestrial network NTN.

[0230] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0231] It should be understood that the network device 700 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 700 are respectively to implement Figure 13 to Figure 14 For the sake of brevity, the corresponding processes of the network device in the method 300 are not repeated here.

[0232] Fig.19 The communication device 800 shown in FIG819 includes a processor 810, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0233] Optionally, as shown in FIG. 819 , the communication device 800 may further include a memory 820. The processor 810 may call and run a computer program from the memory 820 to implement the method in the embodiment of the present application.

[0234] The memory 820 may be a separate device independent of the processor 810 , or may be integrated into the processor 810 .

[0235] Alternatively, if Fig.19 As shown, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0236] The transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include an antenna, and the number of the antennas may be one or more.

[0237] Optionally, the communication device 800 may specifically be a network device of an embodiment of the present application, and the communication device 800 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.

[0238] Optionally, the communication device 800 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 800 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 in detail here for the sake of brevity.

[0239] Fig. 20 The chip 900 shown in FIG920 includes a processor 910, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0240] Alternatively, if Fig. 9 As shown, the chip 900 may further include a memory 920. The processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.

[0241] The memory 920 may be a separate device independent of the processor 910 , or may be integrated into the processor 910 .

[0242] Optionally, the chip 900 may further include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0243] Optionally, the chip 900 may further include an output interface 940. The processor 910 may control the output interface 940 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] Fig.21 1 is a schematic block diagram of a communication system 1000 provided in an embodiment of the present application. Fig.21 As shown, the communication system 1000 includes a terminal device 1010 and a network device 1020 .

[0248] Among them, the terminal device 1010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1020 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0253] 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.

[0254] 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.

[0255] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0256] 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.

[0257] 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.

[0258] The embodiment of the present application also provides a computer program.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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 method for transmitting a common time advance TA, characterized in that: include: The terminal device updates a system message including a first system information block SIB according to a first update period, wherein the first update period is different from a second update period, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first public TA, the second SIB does not include the first public TA, the first public TA is a public TA for a non-terrestrial network NTN, and the first update period is less than the second update period; The method further comprises: The terminal device determines, according to a first short message, whether a system message including the first SIB is updated, wherein the first short message is different from a second short message, and the second short message is used to determine whether a system message including the second SIB is updated; The first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or The first short message and the second short message correspond to different paging search spaces; or The first short message and the second short message correspond to different control resource sets; or The first short message and the second short message correspond to different PDCCH monitoring opportunities.

2. The method according to claim 1, characterized in that The method further comprises: The terminal device determines the first update period according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

3. The method according to claim 2, characterized in that The first update period coefficient and the second update period coefficient are configured through a system message.

4. The method according to claim 2, characterized in that: The first update period coefficient is smaller than the second update period coefficient.

5. The method according to any one of claims 2 to 4, characterized in that: The reference cycle is a default paging cycle.

6. The method according to claim 1, characterized in that The method further comprises: The terminal device monitors the first short message on the paging occasion PO of the terminal device in each non-connection reception DRX cycle, wherein the terminal device is in a non-connection state; or The terminal device monitors the first short message at least once on any PO in each first update cycle, wherein the terminal device is in a connected state.

7. The method according to claim 1, characterized in that The method further comprises: When the terminal device receives the first short message within a first update period P, and the first short message indicates a system message update including the first SIB, the terminal device receives an updated system message including the first SIB within a first update period P+1.

8. A method for transmitting a common time advance TA, characterized in that: include: The network device updates a system message including a first system information block SIB according to a first update period, wherein the first update period is different from a second update period, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first common TA, the second SIB does not include the first common TA, the first common TA is a common TA for a non-terrestrial network NTN, and the first update period is less than the second update period; The network device indicates, by a first short message, whether a system message including the first SIB is updated, wherein the first short message is different from a second short message, and the second short message is used to indicate whether a system message including the second SIB is updated; The first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or The first short message and the second short message correspond to different paging search spaces; or The first short message and the second short message correspond to different control resource sets; or The first short message and the second short message correspond to different PDCCH monitoring opportunities.

9. The method according to claim 8, characterized in that The method further comprises: The network device determines the first update period according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

10. The method according to claim 9, characterized in that The first update period coefficient and the second update period coefficient are configured through a system message.

11. The method according to claim 9 or 10, characterized in that: The first update period coefficient is smaller than the second update period coefficient.

12. The method according to any one of claims 9 to 10, characterized in that: The reference cycle is a default paging cycle.

13. A terminal device, characterized in that: include: a processing unit, configured to update a system message including a first system information block SIB according to a first update period, wherein the first update period is different from a second update period, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first common TA, the second SIB does not include the first common TA, the first common TA is a common TA for a non-terrestrial network NTN, and the first update period is less than the second update period; The processing unit is further used to: determine whether the system message including the first SIB is updated according to the first short message, wherein the first short message is different from the second short message, and the second short message is used to determine whether the system message including the second SIB is updated; The first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or The first short message and the second short message correspond to different paging search spaces; or The first short message and the second short message correspond to different control resource sets; or The first short message and the second short message correspond to different PDCCH monitoring opportunities.

14. The terminal device according to claim 13, characterized in that: The processing unit is also used for: The first update period is determined according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

15. The terminal device according to claim 14, characterized in that: The first update period coefficient and the second update period coefficient are configured through a system message.

16. The terminal device according to claim 14 or 15, characterized in that: The first update period coefficient is smaller than the second update period coefficient.

17. The terminal device according to claim 14 or 15, characterized in that: The reference cycle is a default paging cycle.

18. The terminal device according to claim 13, characterized in that: The terminal device further includes: A communication unit, used to monitor the first short message on the paging monitoring opportunity PO of the terminal device in each non-connected reception DRX cycle, wherein the terminal device is in a non-connected state; or monitor the first short message at least once on any PO in each first update cycle, wherein the terminal device is in a connected state.

19. The terminal device according to claim 13, characterized in that: The terminal device further includes: A communication unit is configured to receive the first short message within a first update period P, and when the first short message indicates a system message update including the first SIB, receive an updated system message including the first SIB within a first update period P+1.

20. A network device, characterized in that: include: a processing unit, configured to update a system message including a first system information block SIB according to a first update period, wherein the first update period is different from a second update period, the second update period is a period for updating a system message including a second SIB, the first SIB includes a first common TA, the second SIB does not include the first common TA, the first common TA is a common TA for a non-terrestrial network NTN, and the first update period is less than the second update period; The processing unit is further configured to determine whether a system message including the first SIB is updated through a first short message, wherein the first short message is different from a second short message, and the second short message is used to determine whether a system message including the second SIB is updated; The first short message and the second short message correspond to different paging radio network temporary identifiers P-RNTI; or The first short message and the second short message correspond to different paging search spaces; or The first short message and the second short message correspond to different control resource sets; or The first short message and the second short message correspond to different PDCCH monitoring opportunities.

21. The network device according to claim 20, characterized in that: The processing unit is also used for: The first update period is determined according to a first update period coefficient and a reference period, wherein the first update period coefficient and the second update period coefficient are not equal, and the second update period coefficient is used to determine the second update period.

22. The network device according to claim 21, characterized in that: The first update period coefficient and the second update period coefficient are configured through a system message.

23. The network device according to claim 21, characterized in that: The first update period coefficient is smaller than the second update period coefficient.

24. The network device according to any one of claims 21 to 23, characterized in that: The reference cycle is a default paging cycle.

25. A terminal device, characterized in that: include: 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 1 to 7.

26. A chip, characterized in that: include: 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 7.

27. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 7.

28. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 7.

29. A network device, characterized in that: include: 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 8 to 12.

30. A chip, characterized in that: The method comprises: 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 8 to 12.

31. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 8 to 12.

32. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 8 to 12.

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