Downlink transmission method, downlink transmission indication method, and apparatus

Abstract

A downlink transmission method, a downlink transmission indication method, and an apparatus. The method comprises: a terminal device receives first information from a network device, wherein the first information is used for indicating discontinuous downlink transmission related information within a range of an associated cell or a beam of the associated cell, and the associated cell comprises a serving cell of the terminal device and / or a neighboring cell of the serving cell; and / or the terminal device performs first processing at least on the basis of the first information, wherein the first processing is related to downlink transmission within the range of the associated cell or the beam of the associated cell.

Description

Downlink transmission method, indication method and device of downlink transmission TECHNICAL FIELD

[0001] The present application relates to the field of communication. BACKGROUND

[0002] In the NR NTN (Non-Terrestrial Network) technology of 5G, a terminal device can access a wireless network by directly connecting with a satellite. The coverage of the wireless network provided by the satellite is related to the height of the satellite. The higher the height of the satellite, the larger the earth surface that can be covered.

[0003] FIG. 1 is a schematic diagram of the earth surface coverage of a satellite at a certain height. As shown in FIG. 1, for a low earth orbit (LEO) satellite with a height of 600 km, the coverage area can reach 2,285,851 km 2 If the minimum elevation angle of the terminal device is reduced to 10°, the satellite can cover a larger earth surface. For such a large satellite coverage area, if it is desired that the signal strength received by terminal devices at different positions from the satellite satisfies the requirement of a 5 MHz transmission bandwidth, the total transmission power of the satellite must be at least more than 10 kW. This is very difficult to achieve for a satellite that uses solar energy as a power supply. For a satellite at a higher orbit, the coverage area of the earth surface can be larger, and the requirement for the total transmission power of the satellite will be higher.

[0004] In the NR NTN work item of 3GPP Release 19, the work objective of downlink coverage enhancement is included, aiming to study possible solutions to provide effective downlink coverage in the footprint area of the satellite under the condition that the power of the satellite is limited or the feeder link bandwidth is limited. In this work item, it is assumed that the power of the satellite is shared by different satellite beams or different satellite beam patterns or sizes (for example, wide beams or narrow beams). The satellite can not activate all the satellite beams within the footprint at the same time, or can only activate part of the satellite beams at a lower than nominal EIRP (Effective Isotropic Radiated Power) power density. In this way, the transmission power of the satellite and the downlink business transmission can be concentrated on a part of the satellite beams and the coverage area of these beams, so as to ensure that the received satellite signal strength in these areas meets the decoding requirements of ordinary terminal devices on the transmission bandwidth required by the business.

[0005] FIG. 2 is a schematic diagram of a coverage area of a satellite cell. As shown in FIG. 2, at a certain moment, the coverage area of a satellite cell (grid shading in FIG. 2) is determined by the beams (dot shading in FIG. 2) that are activated (allocated power) at the same time. The power of the satellite is only allocated to these activated beams.

[0006] According to the allocation adjustment of the power of the satellite to different satellite beams or the satellite beam pattern or beam size of the satellite, the ground area that can be provided with downlink transmission or downlink coverage by the satellite will dynamically change, that is, the power sharing mechanism or the beam hopping mechanism of the satellite makes the downlink coverage or possible downlink transmission of the satellite cell on a given ground area not continuous, but dynamically changes with the power allocated to the relevant satellite beam or the activation.

[0007] The network device needs to indicate the discontinuity of the downlink coverage or transmission of the cell to the relevant terminal device, so that the terminal device only attempts to decode and receive the downlink signal or downlink data of the cell in the time period when the downlink transmission is possible.

[0008] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application and facilitating the understanding of those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art only because it is described in the background section of the present application.

[0009] SUMMARY

[0010] Currently, in the discussion of 3GPP RAN2, for the downlink enhancement technology of Rel-19 in the direction of NR NTN, the network energy saving (NES) technology based on Rel-18 is considered, that is, the network device indicates the possibility of downlink transmission of the relevant cell to the terminal device, for example, indicates the cell-level or beam-level discontinuous transmission (DTX) information in the signaling sent to the terminal device, so that the terminal device does not listen to the broadcast, paging, scheduling and receives the downlink data of the cell during the period when the relevant cell or the beam of the relevant cell is not possible to perform downlink transmission, which can avoid unnecessary downlink signal detection or cell selection or reselection, etc., thereby avoiding meaningless energy consumption; during the period when there may be downlink transmission, the terminal device listens to the broadcast, paging, scheduling and receives the downlink data of the cell, etc.

[0011] According to the current RAN2 discussion progress, the specification work of the downlink enhancement technology of Rel-19 of the NR NTN is still in the stage of clarifying related concepts and application scenarios, the signaling for informing the terminal device of the downlink discontinuous transmission information has not been determined, and the specification work of the content contained in the signaling and how the terminal device receiving the signaling processes it has not started.

[0012] The inventors found that, unlike the NES technology of Rel-18, considering that when a satellite beam is not activated or is not allocated enough power, the related coverage area not only cannot perform downlink scheduling or data transmission, but also may not be able to transmit system information (such as SIB) or even SSB, which not only affects the downlink transmission, state transitions, and handover of terminal devices in the connected state (RRC_CONNECTED state), but also affects the cell selection, paging monitoring, and measurement of terminal devices in the idle state (RRC_IDLE state) or inactive state (RRC_INACTIVE state). Therefore, the discontinuity information of the downlink transmission capability in the range of the related cell or the beam of the related cell needs to be informed not only to terminal devices in the RRC_CONNECTED state, but also to terminal devices in the RRC_IDLE state and the RRC_INACTIVE state, and the related cell should include not only the serving cell of the terminal device, but also the neighbor cell.

[0013] To solve one or more of the above problems, the embodiments of the present application provide a downlink transmission method, an indication method and device of downlink transmission.

[0014] According to an aspect of the embodiments of the present application, a downlink transmission device is provided, the device is arranged in a terminal device, and the device comprises: a receiving unit configured to receive first information from a network device, the first information being used to indicate related information of downlink discontinuous transmission in a range of an associated cell or a beam of the associated cell, the associated cell comprising a serving cell of the terminal device and / or a neighbor cell of the serving cell; and / or a processing unit configured to perform first processing according to at least the first information, the first processing being related to the downlink transmission in the range of the associated cell or the beam of the associated cell.

[0015] According to another aspect of the embodiments of the present application, an indication device of downlink transmission is provided, which is applied to a network device, and the device comprises: a generating unit configured to generate first information, the first information being used for indicating relevant information of downlink discontinuous transmission within a range of the associated cell or a beam of the associated cell, the associated cell comprising a serving cell of a terminal device and / or a neighboring cell of the serving cell; and a sending unit configured to send the first information.

[0016] According to still another aspect of the embodiments of the present application, a communication system is provided, which comprises a terminal device and / or a network device, the terminal device comprising the above-mentioned downlink transmission device according to the embodiments of the present application, and the network device comprising the above-mentioned indication device of downlink transmission according to the embodiments of the present application.

[0017] According to still another aspect of the embodiments of the present application, a downlink transmission method is provided, which is applied to a terminal device, and the method comprises: the terminal device receiving first information from a network device, the first information being used for indicating relevant information of downlink discontinuous transmission within a range of the associated cell or a beam of the associated cell, the associated cell comprising a serving cell of the terminal device and / or a neighboring cell of the serving cell; and / or, the terminal device performing first processing according to at least the first information, the first processing being related to downlink transmission within the range of the associated cell or the beam of the associated cell.

[0018] According to still another aspect of the embodiments of the present application, an indication method of downlink transmission is provided, which is applied to a network device, and the method comprises: the network device generating first information, the first information being used for indicating relevant information of downlink discontinuous transmission within a range of the associated cell or a beam of the associated cell, the associated cell comprising a serving cell of a terminal device and / or a neighboring cell of the serving cell; and the network device sending the first information.

[0019] According to still another aspect of the embodiments of the present application, a computer readable program is provided, which, when executed in a downlink transmission device or a terminal device, causes the downlink transmission device or the terminal device to perform the above-mentioned downlink transmission method according to the embodiments of the present application.

[0020] According to still another aspect of the embodiments of the present application, a computer readable program is provided, which, when executed in a downlink transmission device or a terminal device, causes the downlink transmission device or the terminal device to perform the above-mentioned downlink transmission method according to the embodiments of the present application.

[0021] According to still another aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, wherein the computer readable program causes the downlink transmission device or the terminal device to perform the downlink transmission method according to the embodiments of the present application.

[0022] According to still another aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, wherein the computer readable program causes the downlink transmission device or the terminal device to perform the downlink transmission method according to the embodiments of the present application.

[0023] One of the beneficial effects of the embodiments of the present application is that, in the case that the total transmission power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the relevant information of the downlink discontinuous transmission in the associated cell or the range of the beam of the associated cell indicated by the network device, so as to avoid unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and save the power consumption of the terminal device; and by excluding some candidate cells which cannot perform downlink transmission or are limited in downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0024] Specific embodiments of the application are disclosed in the following description and in the accompanying drawings, indicating both the principles of the application and the manner in which the application can be used by those skilled in the art. It should be understood that the embodiments of the application are not limited in scope to the specific embodiments described herein. In the scope of the appended claims and their equivalents, the embodiments of the application encompass many changes, modifications and equivalents.

[0025] Features described and / or illustrated with respect to one implementation can be used in one or more other implementations in the same or similar manner, in combination with or in place of features in other implementations, or in combination with or in place of one or more features described and / or illustrated with respect to another implementation.

[0026] It should be emphasized that the term "comprises / comprising" when used in this text, means the presence of the stated features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0027] Elements and features described with respect to one drawing or implementation of the application can be combined with elements and features illustrated in one or more other drawings or implementations in any combination. Also, in the drawings, like numbers refer to like elements throughout the several views, and the words "first", "second", and other words indicating possible distinguishing features are used only to distinguish one element from another, not necessarily describing a physical, chronological or hierarchical order or sequence.

[0028] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0029] Fig. 1 is a schematic diagram of the earth surface coverage of a certain altitude orbiting satellite;

[0030] Fig. 2 is a schematic diagram of the coverage area of a satellite cell;

[0031] Fig. 3 is a schematic diagram of a communication system according to an embodiment of the application;

[0032] Fig. 4 is a schematic diagram of a downlink transmission method according to an embodiment of the application;

[0033] Fig. 5 is a schematic diagram of an indication method of downlink transmission according to an embodiment of the application;

[0034] Fig. 6 is an interaction diagram of a downlink transmission method according to an embodiment of the application;

[0035] Fig. 7 is another interaction diagram of a downlink transmission method according to an embodiment of the application;

[0036] Fig. 8 is a schematic diagram of a downlink transmission apparatus according to an embodiment of the application;

[0037] Fig. 9 is a schematic diagram of an indication apparatus of downlink transmission according to an embodiment of the application;

[0038] Fig. 10 is a schematic block diagram of the system structure of a terminal device according to an embodiment of the application;

[0039] Fig. 11 is a schematic block diagram of the system structure of a network device according to an embodiment of the application. DETAILED DESCRIPTION

[0040] The foregoing and other features of the application will become more apparent from the following description and accompanying drawings. In the description and drawings, particular embodiments of the application have been disclosed in detail as being illustrative. It should be understood that the application is not limited to the embodiments described and illustrated, and is intended to include modifications, variations, and equivalents that fall within the scope of the appended claims.

[0041] In the embodiments of the present application, the terms "first", "second" and the like are used to distinguish different elements from each other, but do not indicate spatial arrangement or time sequence of the elements, and the elements should not be limited by the terms. The term "and / or" includes any one and all combinations of the associated listed terms. The terms "comprise", "include", "have" and the like mean the presence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

[0042] In the embodiments of the present application, the singular form "a", "an" and the like includes the plural form, should be broadly understood as "one" or "a kind of", and not limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to", and the term "based on" should be understood as "at least partially based on", unless the context clearly indicates otherwise.

[0043] In the embodiments of the present application, the term "communication network" or "wireless communication network" can refer to a network that conforms to any communication standard, such as Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), etc.

[0044] In addition, the communication between devices in the communication system can be carried out according to any stage communication protocol, which can include but is not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future 5G, New Radio (NR), etc., and / or other currently known or future to be developed communication protocols.

[0045] In the embodiments of the present application, the term "network" or "network device" or "network node" refers to, for example, a device in a communication system that accesses a communication network and provides services for a user equipment. The network device or network node can include, but is not limited to, the following devices: "node" and / or "donor" under the IAB architecture, base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), and the like.

[0046] Wherein, the base station can include, but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and can also include remote radio head (RRH), remote radio unit (RRU), relay, or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all functions of them, and each base station can provide communication coverage for a specific geographic area, for example, the 5G base station gNB can include a gNB CU and one or more gNB DUs, wherein the CU / DU is a logical node of the gNB with part of the function of the gNB. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used. One gNB-DU supports one or more cells, and one cell is only supported by one gNB-DU.

[0047] In the embodiments of the present application, the term "user equipment" (UE) refers to, for example, a device that accesses a communication network through a network device and receives network services, which can also be referred to as "terminal equipment" (TE). The terminal equipment can be fixed or mobile, and can also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc. For example, the terminal equipment served by the IAB node or the IAB donor under the IAB architecture.

[0048] The terminal device can include, but is not limited to, a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop, a cordless phone, a smartphone, a smartwatch, a digital camera, and the like.

[0049] For another example, in scenarios such as Internet of Things (IoT), the terminal device can also be a machine or apparatus that performs monitoring or measurement, for example, can include, but is not limited to, a machine type communication (MTC) terminal, a vehicle-mounted communication terminal, a device to device (D2D) terminal, a machine to machine (M2M) terminal, and the like.

[0050] In embodiments of the present application, "when", "in the case of", "for the case of", and "if" all represent based on a certain condition or state, and in addition, these expressions can be replaced with each other.

[0051] The following describes scenarios of embodiments of the present application by way of examples, but the present application is not limited thereto.

[0052] FIG. 3 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates a case taking a terminal device and a network device as examples. As shown in FIG. 3, the communication system 100 can include a network device 101 and a terminal device 102. For simplicity, FIG. 3 only takes one terminal device and one network device as examples for illustration, but embodiments of the present application are not limited thereto.

[0053] In embodiments of the present application, the network device 101 and the terminal device 102 can perform existing services or future implementable service transmission. For example, the services can include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), and the like.

[0054] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, referred to as an RRC message (RRC message), for example, including an MIB, system information, a dedicated RRC message; or referred to as an RRC IE (RRC information element). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or referred to as a MAC CE (MAC control element). However, the present application is not limited thereto.

[0055] The various embodiments of the present application will be described below in conjunction with the accompanying drawings. These embodiments are only exemplary and are not limiting of the present application.

[0056] Embodiments of the first aspect

[0057] The embodiments of the present application provide a downlink transmission method, which is applied to a terminal device, for example, the terminal device 102 in FIG. 3.

[0058] FIG. 4 is a schematic diagram of the downlink transmission method according to an embodiment of the present application. As shown in FIG. 4, the method includes the following steps.

[0059] 401: The terminal device receives first information from a network device; and / or

[0060] 402: The terminal device performs first processing according to at least the first information.

[0061] In the embodiments of the present application, the first information is used to indicate relevant information of downlink discontinuous transmission within a range of an associated cell or a beam of the associated cell, and the associated cell includes a serving cell of the terminal device and / or a neighboring cell of the serving cell; and the first processing is related to downlink transmission within the range of the associated cell or the beam of the associated cell.

[0062] In this way, in the case that the total transmission power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the relevant information of downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell indicated by the network device, thereby avoiding unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and saving the power consumption of the terminal device; and by excluding some candidate cells that cannot perform downlink transmission or are limited in downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0063] In the embodiments of the present application, the method includes at least one of operation 401 and operation 402, that is, the method includes operation 401, or the method includes operation 402, or the method includes operation 401 and operation 402. In the embodiments of the present application, the first information is used to indicate relevant information of downlink discontinuous transmission within a range of an associated cell or a beam of the associated cell, and the associated cell includes a serving cell of the terminal device and / or a neighboring cell of the serving cell; and the first processing is related to downlink transmission within the range of the associated cell or the beam of the associated cell.

[0064] In operation 401, the terminal device receives first information from the network device, the first information being used for indicating related information of downlink discontinuous transmission within a range of an associated cell or a beam of the associated cell.

[0065] In embodiments of the present application, the associated cell can include a serving cell of the terminal device and / or a neighboring cell of the serving cell, that is, the associated cell can be the serving cell of the terminal device, or can be a neighboring cell of the serving cell of the terminal device, or can include the serving cell and the neighboring cell of the serving cell.

[0066] In embodiments of the present application, the "downlink discontinuous transmission" can also be replaced by "downlink transmission discontinuous" or Downlink DTX (Discontinous Transmission) or DTX.

[0067] In embodiments of the present application, "discontinuous" means discontinuous in time or time domain or time domain resource.

[0068] In embodiments of the present application, the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell can include: in all or part of the area of the associated cell or the beam of the associated cell, downlink transmission is prohibited, or downlink transmission cannot be performed, or downlink transmission is limited, or specific downlink transmission is allowed or can be performed.

[0069] For example, for all or part of the area of the associated cell or the beam of the associated cell, there is a specific time period; in the specific time period, all or part of the area of the associated cell or the beam of the associated cell prohibits downlink transmission, or cannot perform downlink transmission, or downlink transmission is limited, or specific downlink transmission is allowed or can be performed.

[0070] Correspondingly, for example, the related information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell can include: information of whether to prohibit downlink transmission or whether to be unable to perform downlink transmission or whether downlink transmission is limited or whether specific downlink transmission is allowed or can be performed in all or part of the area of the associated cell or the beam of the associated cell.

[0071] In embodiments of the present application, for example, the first information can be included in second information, the second information being used for indicating downlink transmission capability within the range of the associated cell or the beam of the associated cell of the terminal device and / or indicating other information of downlink transmission within the range of the associated cell or the beam of the associated cell of the terminal device.

[0072] In embodiments of the present application, the first information is indicated by broadcast signaling or a message, and / or the first information is indicated by dedicated signaling or a message.

[0073] That is, in the first implementation, the first information can be indicated by broadcast signaling or message, so that not only the terminal device in the RRC_CONNECTED state can receive the first information indicated by the network device, but also the terminal device in the RRC_IDLE or RRC_INACTIVE state can receive the first information. In addition, the associated cell of the terminal device includes not only the serving cell of the terminal device, but also the neighboring cell of the serving cell of the terminal device, so that the terminal device can adjust the processing for the serving cell and the decision for the neighboring cell according to the first information, for example, whether to take a certain neighboring cell as a candidate cell or the like. It is avoided that the terminal device performs meaningless monitoring, detection and the like on the cell which cannot currently perform downlink transmission, and it is also avoided that the terminal device is handed over or reselected to the cell which is prohibited or restricted in downlink transmission.

[0074] In the embodiments of the present application, the broadcast signaling or message can include system message and / or other broadcast signaling or message.

[0075] For example, the system message includes SIBn, n is a natural number.

[0076] In the embodiments of the present application, SIBn can refer to system information in a communication system applying any stage protocol, for example, including one or more of SystemInformationBlockTypen, for example, SIB1, SIB3, SIB5, SIB6, SIB7, SIB19, SystemInformationBlockType24, SystemInformationBlockType33 and new SIBn which already exist.

[0077] For example, the new SIBn can be a SIB which is introduced in the future and has not been defined at present.

[0078] For another example, the other broadcast signaling or message includes MBS related signaling or message.

[0079] In the embodiments of the present application, the first information includes at least one of information indicated by a first parameter, area information and time information.

[0080] In the embodiments of the present application, the first parameter is used to indicate that access or downlink transmission is prohibited or cannot be performed or is restricted in the range of the associated cell or the beam of the associated cell, and / or the first parameter is used to indicate that access or downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed in the range of the associated cell or the beam of the associated cell.

[0081] For example, the first parameter includes cellBarredNTN and / or cellBarredNES and / or other parameters.

[0082] For example, the SIB1 contains a cellBarredNTN indicating whether the cell is barred from connecting to non-terrestrial networks (NTN); in addition, the SIB1 can also include a cellBarredNES indicating whether the cell is in a barring state for terminal devices supporting nes-CellDTX-DRX. Based on cellBarredNTN and / or cellBarredNES, the network device can indicate the first information to the terminal device through a specific parameter (first parameter) in the SIB1.

[0083] The specific method of indicating the first information to the terminal device through the specific parameter (first parameter) in the SIB1 is described below.

[0084] Method 1: directly reuse cellBarredNTN as the first parameter; for example, when the value of cellBarredNTN is barred, it indicates that the downlink transmission cannot be performed or is limited within the range of the associated cell, or that the downlink transmission cannot be performed or is limited within the coverage range of the beam of the associated cell.

[0085] Method 2: directly reuse cellBarredNES as the first parameter to indicate the barring state within the range of the associated cell or the beam of the associated cell; for example, when the value of cellBarredNES is notBarred, it indicates that the normal downlink transmission can be performed within the range of the associated cell, or that the normal downlink transmission can be performed within the coverage range of the beam of the associated cell.

[0086] For method 2, it can also include that when cellBarredNES does not appear in the SIB1, it indicates that the terminal device is barred from accessing or barred from performing downlink transmission or cannot perform downlink transmission or downlink transmission is limited within the range of the associated cell or within the coverage range of the beam of the associated cell; wherein the terminal device is a terminal device supporting downlink discontinuous transmission, such as nes-CellDTX-DRX or similar NTN-specific CellDTX(-DRX) parameters, such as ntn-CellDTX(-DRX).

[0087] Method 3: using cellBarredNTN and cellBarredNES together as the first parameter, for example, the value of cellBarredNTN is notBarred, but cellBarredNES is absent in this SIB1, indicating that there is no prohibition for the terminal device to connect to the NTN within the range of the associated cell, but for the terminal device supporting downlink discontinuous transmission, similar to method 2, within the range of the associated cell, or within the coverage range of the beam of the associated cell, access is prohibited or downlink transmission is prohibited or cannot be performed or is limited;

[0088] Method 4: using a parameter specially used to indicate that access is prohibited or downlink transmission is prohibited or downlink transmission is limited as the first parameter, indicating that access is prohibited or downlink transmission is prohibited or cannot be performed or is limited within the range of the associated cell or within the coverage range of the beam of the associated cell, for example: cellBarredNTNNES, cellBarredNTNDLNES, cellBarredNESNTN, ntn-cellBarredNES, cellBarredNESNTNDL, etc.

[0089] Method 5: using a parameter specially used to indicate that access is allowed or downlink transmission is allowed or a specific downlink transmission is allowed or can be performed as the first parameter, indicating that access is allowed or downlink transmission is allowed or downlink transmission can be performed or a specific downlink transmission is allowed or can be performed within the range of the associated cell or within the coverage range of the beam of the associated cell.

[0090] In the embodiments of the present application, the downlink transmission is limited and / or a specific downlink transmission is allowed or can be performed, including at least one of the following:

[0091] Only SSB can be transmitted;

[0092] Only scheduling information of SIB can be transmitted, for example, DCI scheduling SIBn;

[0093] Only part of the specified system messages can be transmitted, for example, SIBn, for example, only SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7 can be transmitted;

[0094] Only system messages can be transmitted;

[0095] Only common messages can be transmitted, and the common messages are used for terminal device discovery or access or measurement of the associated cell;

[0096] Only terminal device-specific signaling and / or data can be transmitted.

[0097] In the embodiments of the present application, for the method 1 to the method 5, the first information can further include a time offset indicating the validity of the first parameter in the SIB1, for example, the time offset is DeltaT1, indicating that the configuration in the method 1 to the method 5 is not valid immediately, but is valid after the time indicated by DeltaT1.

[0098] In the embodiments of the present application, for the method 1 to the method 5, the first information can further include a time of downlink transmission recovery indicated by the network device to the terminal device, for example, revisit time, or a remaining time of downlink transmission, for example, dwelling time / interval.

[0099] In the embodiments of the present application, for the method 1 to the method 5, the first information can further include a time of possible downlink transmission recovery indicated by the network device to the terminal device, for example, recheck time, after which the terminal device reattempts to detect or receive the downlink transmission.

[0100] The recovery time or the remaining time or the possible recovery time can also be implicitly indicated, for example, agreed in advance by the network device and the terminal device, without the network device explicitly indicating by the signaling parameter, and the terminal device automatically reattempts to detect or receive the downlink transmission after the specified time.

[0101] In the embodiments of the present application, the beam of the associated cell can also be a specific beam belonging to the associated cell, for example, the beam of the associated cell used by the network device when transmitting the signaling containing the first parameter.

[0102] In addition, in the embodiments of the present application, as described above, the method about the SIB1 can also use other SIBn instead, for example, using other SIBn to indicate the first information, the other SIBn including the existing SIBn, for example, SIB19 specially used to indicate the configuration of the NTN, SIB3 used to indicate the configuration of the same frequency adjacent cell, SIB4 used to indicate the configuration of the different frequency adjacent cell, SystemInformationBlockType3 / 5 / 24 / 33 used to indicate the configuration of the adjacent NR NTN cell of the EUTRA cell, etc.; the new SIBn not yet defined can also be used to indicate the first information; other broadcast modes can also be used to indicate the first information, for example, MBS.

[0103] In the embodiments of the present application, the information element (IE) for indicating the first information can be contained in an already existing IE or similar to the already existing IE, for example, ntn-Config or similar IE of ntn-Config for configuring satellite related parameters for accessing an NTN cell; for example, ntn-NeighCellConfigList, ntn-NeighCellConfigListExt, NeighSatelliteInfo-r18 or similar IE for providing parameters of neighboring NTN cells; or can be contained in a newly defined IE, for example, an information element for configuring the first information for each satellite, for example, based on each satellite cell identifier (for example, PhysCellId) or satellite identifier (for example, satelliteId) to configure the first information of the corresponding cell or satellite.

[0104] The first parameter in the embodiments of the present application is specifically described above.

[0105] As described above, the first information can also include area information, that is, the related parameters of the area information can also be used to indicate the first information.

[0106] Since the minimum granularity of satellite power sharing is a satellite beam, and there is a scenario where a satellite cell is not one-to-one mapped with a satellite beam, when a satellite cell is covered by multiple satellite beams, if only part of the satellite beams are activated or turned on, it will cause that a part of the area of the satellite cell cannot perform downlink transmission or the downlink transmission is limited, while the downlink transmission of other parts is not affected, that is, at the same time, the range of the satellite cell has or loses downlink coverage. Therefore, the first information can include a specific area where the downlink transmission is limited or not limited, instead of the entire satellite cell.

[0107] In the embodiments of the present application, the area information can be used to indicate a first area within the range of the associated cell or the beam of the associated cell, the first area is a barred cell, a barred beam, a barred area, a DL transmission limited cell, a DL transmission limited beam, a DL transmission limited area, or the like.

[0108] For example, the first area is one or more of a barred cell, a barred beam, and a barred area, or the first area is one or more of a DL transmission limited cell, a DL transmission limited beam, and a DL transmission limited area.

[0109] In the embodiments of the present application, the area information can also be used to indicate a second area within the range of the associated cell or the beam of the associated cell, and the second area is an area that allows downlink transmission or can perform downlink transmission or allows or can perform specific downlink transmission,

[0110] For example, the second area is one or more of allowed cell, allowed beam, and allowed area, or the first area is one or more of DL transmission available cell, DL transmission available beam, and DL transmission available area.

[0111] In the embodiments of the present application, the area information is represented in at least one of the following ways:

[0112] Geographic area information of the area;

[0113] Information of the beam of the associated cell corresponding to the area;

[0114] Indicating that the area is the entire range of the associated cell.

[0115] For the geographic area information of the area, for example, the geographic area information includes at least one of the following: information of a circle representing the geographic area, information of a polygon representing the geographic area, information of an ellipse representing the geographic area, and information of the boundary of the geographic area, wherein the information of the circle includes one or more of the following: a reference point (such as the center of the circle) of the circle and the diameter, radius, distance from the reference point, etc. of the circle, and the reference point can be represented by Ellipsoid-Point in the positioning technology, which can include the latitude and longitude information of the reference point.

[0116] For the information of the beam of the associated cell corresponding to the area, for example, the beam of the associated cell is a beam visible to the terminal device side, rather than a satellite beam; for example, the beam of the associated cell is an SSB beam or a CSI-RS beam; in addition, the information of the beam of the associated cell can be represented by a beam identifier, or the beam of the associated cell is the beam of the associated cell used by the network device when transmitting the signaling indicating the first information.

[0117] For the indication area being the whole range of the associated cell, for example, the indication area being the whole range of the associated cell includes: the range indicated by the area information being the whole range of the associated cell, and / or, the configuration of the area information not appearing in the specified signaling or message, indicating that the area is the whole associated cell, and / or, the first information being cell level, such as cell level DTX, etc.

[0118] As described above, the first information can also include time information, that is, the related parameters of the time information can also be used to indicate the first information.

[0119] In the embodiments of the present application, the time information is used to indicate the duration of the prohibition of downlink transmission and / or the inability to perform downlink transmission and / or the restriction of downlink transmission, and / or,

[0120] The time information is used to indicate the duration of the permission of downlink transmission or the ability to perform downlink transmission or the permission or ability to perform specific downlink transmission.

[0121] For example, the duration in the time information is a fixed duration, including a fixed time length by default of the terminal device and / or a fixed time length indicated by the network device; for example, the fixed duration is 300s, and the terminal device reattempts to detect or receive downlink transmission after 300s;

[0122] For another example, the duration in the time information is a time length determined by the terminal device according to the configuration of the network device.

[0123] In the embodiments of the present application, the configuration of the network device can be used to indicate a first time, the first time being a revisit time from the time of starting "permission of downlink transmission or ability to perform downlink transmission or permission or ability to perform specific downlink transmission", for example, the first time being greater than zero indicating that the power of the satellite beam covering the current location has been lowered or tuned away, and the current location prohibiting downlink transmission and / or being unable to perform downlink transmission and / or being restricted in downlink transmission.

[0124] In the embodiments of the present application, the configuration of the network device can also be used to indicate a second time, the second time being a dwelling time from the time of stopping "permission of downlink transmission or ability to perform downlink transmission or permission or ability to perform specific downlink transmission";

[0125] In addition, in the embodiments of the present application, the configuration of the network device can also be used to indicate a third time, the third time being a tuning away time of the power of the satellite beam covering the current location.

[0126] In the embodiments of the present application, the configuration of the network device about the time information in the first information includes at least one of the following:

[0127] absolute time,

[0128] reference time,

[0129] time offset,

[0130] information related to downlink discontinuous transmission;

[0131] For example, the absolute time is a time at which downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed, or a time at which downlink transmission is stopped or a specific downlink transmission is stopped; that is, a specific time is indicated;

[0132] For example, the reference time is an epoch time of a satellite providing coverage for the associated cell or an end of SI window of scheduling SIBn or an absolute time configured by the network device,

[0133] For example, the time offset is an offset relative to the reference time;

[0134] For example, for discontinuous transmission (DTX) and / or discontinuous reception (DRX) mode, the information related to downlink discontinuous transmission includes a period of downlink discontinuous transmission and / or a duration of allowing or being able to perform downlink transmission or allowing or being able to perform a specific downlink transmission in the period of downlink discontinuous transmission.

[0135] In operation 402, the terminal device performs first processing according to at least the first information, the first processing being related to downlink transmission within a range of the associated cell or a beam of the associated cell.

[0136] In an embodiment of the present application, the first processing can include:

[0137] determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in a first downlink state for the terminal device,

[0138] The first downlink state includes a state of prohibiting downlink transmission and / or a state of being unable to perform downlink transmission and / or a state of downlink transmission being limited and / or a state of allowing or being able to perform a specific downlink transmission.

[0139] For example, the downlink transmission being limited and / or the allowing or being able to perform a specific downlink transmission includes at least one of the following:

[0140] only SSB can be transmitted;

[0141] only scheduling information of SIB can be transmitted;

[0142] only transmit part of the specified system messages, for example, SIBn, for example, only transmit SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7;

[0143] only transmit system messages;

[0144] only transmit public messages, the public messages are used for terminal device discovery or access or measurement associated cells;

[0145] only transmit dedicated signaling and / or data of terminal devices.

[0146] The following will be specifically described how to determine whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in the first downlink state for the terminal device.

[0147] In the embodiments of the present application, whether the associated cell is in the first downlink state for the terminal device can be determined according to the value or signaling or signal of the specified parameter used to indicate the first information;

[0148] In the embodiments of the present application, whether the associated cell is in the first downlink state for the terminal device can also be determined according to whether the terminal device receives the specified signaling or signal used to indicate the first information;

[0149] For example, after successfully parsing the SSB (including MIB) of the associated cell, the terminal device does not receive or detect the corresponding SIBn, and then the terminal device considers that the associated cell is in the first downlink state. In addition, since the power of the satellite beam used for downlink transmission may be adjusted to other satellite beams after the network device transmits the SSB, it is impossible to complete the transmission of all key SIBs or the scheduling information of the SIBs, and the terminal device may miss the SIBs or related scheduling information transmitted by the associated cell in the new downlink available period when judging that the associated cell enters the first downlink state. Therefore, for the terminal device to determine whether the specified signaling or signal used to indicate the first information is received, it can also include that the terminal device still does not receive the signaling or signal after continuously attempting to receive the signaling or signal for a period of time, and then it is determined that the specified signaling or signal used to indicate the first information is not received. The length of the period of time of the attempt to receive can be a time length related to the (maximum) SSB period or the possible or known or preset downlink available interval.

[0150] In the embodiments of the present application, whether the associated cell is in the first downlink state for the terminal device can also be determined according to whether a parameter indicating the first information is contained in the signaling or signal received by the terminal device for indicating the first information. For example, after successfully parsing the SSB (including MIB) of the associated cell, if the specified parameter for indicating the first information in the SIBn received by the terminal device does not appear, the terminal device considers that the associated cell is in the first downlink state.

[0151] Taking SIB19 as an example, if the configuration for indicating the first information is added in SIB19, the terminal device can determine that the associated cell is in the first downlink state for the terminal device when one of the following conditions is met:

[0152] The configuration for indicating the first information in SIB19 indicates that the associated cell cannot perform downlink transmission or downlink transmission is prohibited or downlink transmission is restricted, for example, barred.

[0153] The configuration for indicating the first information in SIB19 does not appear.

[0154] SIB19 cannot be detected.

[0155] SIB1 does not schedule SIB19.

[0156] In the embodiments of the present application, the terminal device can also determine whether the associated cell is in the first downlink state for the terminal device according to the received first information and the location of the terminal device.

[0157] In the embodiments of the present application, the first processing can further include:

[0158] determining a first duration of the first downlink state,

[0159] The first duration is a time length that is default for the terminal device or a time length that is determined by the terminal device according to the indication of the network device, including a time length determined according to time information contained in the first information indicated by the network device,

[0160] For example, the time length that is default for the terminal device is a time length defined by a standard or determined by terminal device implementation.

[0161] In the embodiments of the present application, the first processing can further include:

[0162] performing a second processing within the first duration in which it is determined that the associated cell is in the first downlink state;

[0163] For example, the second processing includes at least one of the following processing:

[0164] exclude the associated cell from suitable cells of the terminal device,

[0165] exclude the associated cell from candidate cells for cell switching or cell selection or cell reselection of the terminal device,

[0166] exclude a satellite that causes the associated cell to be in the first state from candidate satellites for satellite switch of the terminal device,

[0167] stop and not initiate new detection or reception for downlink transmission of the associated cell by the terminal device,

[0168] stop and not initiate new measurement for the associated cell by the terminal device,

[0169] the terminal device performs at least one of cell switching, cell selection, cell reselection, satellite switch and cell measurement to available candidate cells or satellites;

[0170] processing according to network device configuration or indication, including at least one of cell selection, cell reselection and cell measurement; for example, processing according to indication in RRCRelease;

[0171] exit RRC CONNECTED (RRC_CONNECTED) state;

[0172] enter RRC IDLE (RRC_IDLE) state or RRC INACTIVE (RRC_INACTIVE) state;

[0173] enter sleep state;

[0174] ignore DRX related configuration of the terminal device, including ignoring DRX on duration of the terminal device.

[0175] In embodiments of the present application, the first processing can further include:

[0176] after determining that the first duration of the associated cell being in the first downlink state ends, performing third processing.

[0177] For example, the third processing includes at least one of the following processing:

[0178] wake up and / or ignore DRX related configuration of the terminal device; for example, including waking up in a time period adjacent or next to the associated cell not being in the first state when the DRX on duration of the terminal device is staggered with the downlink transmittable time period;

[0179] entering an active state;

[0180] detecting or receiving downlink transmission of the associated cell; for example, re-detecting or attempting to detect downlink transmission of the associated cell, including SSB, SIBn, DCI, PAGING, PDSCH, etc.

[0181] receiving the latest first information;

[0182] re-determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell is in the first downlink state for the terminal device.

[0183] As described above, for the manner of sending the first information, in the first implementation, the first information can be indicated by broadcast signaling or message, and in the second implementation, the first information can also be indicated by dedicated signaling or message, so that the terminal device in the RRC_CONNECTED state can receive the first information indicated by the network device, and the network device can specify different first information for different terminal devices, that is, even in the same satellite beam coverage area, the network device can prohibit downlink transmission to part of the terminal devices, so that the bandwidth can be controlled and the limitation of the feeder link can be met, and the configuration is more flexible.

[0184] In the embodiments of the present application, the dedicated signaling or message can include RRC message and / or MAC CE and / or DCI;

[0185] For example, the RRC message can be one or more of Servingcellconfiguration, ServingCellConfigCommon, ServingCellConfigCommonSIB, RRCRelease, etc.

[0186] For example, the MAC CE can also be replaced by other MAC layer messages;

[0187] For example, the DCI can also be replaced by other physical layer messages.

[0188] For the second implementation, the configuration manner of indicating the first information is similar to the first implementation, and specific cell-level or beam-level parameters or information of configuring specific areas in the cell can also be used to indicate the downlink transmission capability of the associated cell for the terminal device in the entire associated cell range or the entire beam range or the specific area range.

[0189] In the embodiments of the present application, for the specific cell level or beam level parameters, in addition to the cellBarredNTN, cellBarredNES and the combination of the two parameters described in the first implementation, or similar parameters, etc., the reuse CellDTXDRX-Config or introduce similar parameters, such as ntn-CellDTXDRX-Config, etc. For example, the beam level parameter refers to the beam used when transmitting the dedicated signaling or message containing the specific parameters.

[0190] In the embodiments of the present application, for the configuration of the specific area information, similar to the description in the first implementation, it can be a specific geographic range or geographic area on the specific surface of the earth, or it can be beam information visible to the terminal device, such as beam id, and the network device maintains the mapping of the beam visible to the terminal device and the satellite beam.

[0191] In the embodiments of the present application, for the specific parameters or area information described above, the network device can also display or implicitly indicate the time information related to the configuration, including at least one of the following:

[0192] the effective time length of the configuration,

[0193] the agreed time length,

[0194] the time length of downlink transmission prohibition or restriction,

[0195] the duration length of downlink transmission or coverage,

[0196] the length from the next downlink transmission or coverage recovery.

[0197] In the embodiments of the present application, in addition to being similar to the first implementation, the specific parameters and the area information can also be used as an independent method for indicating the first information, for example, in the area information indicated by the network device, it is indicated that within the range of the area, the downlink transmission of the terminal device is prohibited or restricted, etc.

[0198] In addition, the specific parameters and the area information can also be combined to indicate the first information, for example, the area information is used to specify a range of the area on the surface of the earth to the terminal device, and the specific parameters are used to indicate whether the area is prohibited or restricted for the downlink transmission of the terminal device.

[0199] In the third implementation, the first information can be indicated by broadcast signaling or message and dedicated signaling or message, that is, the above two implementations are combined, so that the broadcast manner can configure relatively general first information to solve the power sharing problem, and the corresponding terminal device related information in the corresponding area is indicated for the case where the downlink transmission / coverage cannot be provided; the dedicated signaling or message manner can configure updated terminal device specific first information to solve the bandwidth or feeder link limited problem.

[0200] In addition, for the second implementation and the third implementation, the first processing of the terminal device according to the first information is similar to the first processing in the first implementation, which is not repeated here.

[0201] As can be seen from the above embodiments, in the case of dynamic sharing of the total transmission power of the satellite between satellite beams, the terminal device can perform corresponding processing according to the downlink discontinuous transmission related information of the associated cell or the range of the beam of the associated cell indicated by the network device, avoid unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and save terminal device power consumption; and by excluding some candidate cells that cannot perform downlink transmission or have limited downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0202] Embodiments of the second aspect

[0203] The embodiments of the present application provide an indication method of downlink transmission, which is applied to a network device and corresponds to the downlink transmission method applied to a terminal device in the embodiments of the first aspect. The same or corresponding contents can be referred to the description in the embodiments of the first aspect.

[0204] The method is applied to a network device, for example, the network device 101 in FIG. 3.

[0205] FIG. 5 is a schematic diagram of an indication method of downlink transmission according to an embodiment of the present application. As shown in FIG. 5, the method comprises:

[0206] 501: The network device generates first information;

[0207] 502: The network device sends the first information.

[0208] In the embodiments of the present application, the first information is used to indicate the downlink discontinuous transmission related information in the range of the associated cell or the beam of the associated cell, and the associated cell includes the serving cell of the terminal device and / or the neighboring cell of the serving cell.

[0209] In operation 501, the network device determines the mode and / or state and / or duration of downlink discontinuous transmission within the associated cell or the beam range of the associated cell, thereby generating first information. For example, the network device determines and generates relevant information on downlink discontinuous transmission within the associated cell or the beam range of the associated cell of the terminal device based on a satellite power sharing mechanism or a beam hopping mechanism, wherein the associated cell includes the serving cell of the terminal device and / or neighboring cells of the serving cell of the terminal device.

[0210] In operation 502, the network device indicates first information to the terminal device via broadcast signaling or messages, and / or the network device indicates first information to the terminal device via dedicated signaling or messages.

[0211] For example, a network device sends first information via broadcast signaling or a message, so that terminal devices in the RRC_CONNECTED state, terminal devices in the RRC_IDLE state, and terminal devices in the RRC_INACTIVE state can all receive the first information;

[0212] For example, the network device sends the first information to the terminal device in the RRC_CONNECTED state via dedicated signaling or messages.

[0213] The following explanation combines the actions of the network device side and the terminal device side.

[0214] Figure 6 is an interactive diagram of a downlink transmission method according to an embodiment of this application. The method includes:

[0215] 601: Network device generates first information;

[0216] 602: The network device sends the first information via broadcast signaling or message;

[0217] 603: The terminal device receives the first information; the terminal device may be a terminal device in the RRC_CONNECTED state, or a terminal device in the RRC_IDLE state, or a terminal device in the RRC_INACTIVE state;

[0218] 604: The terminal device performs a first process based on the first information.

[0219] Figure 7 is another interactive diagram of a downlink transmission method according to an embodiment of this application. The method includes:

[0220] 701: Network device generates first information;

[0221] 702: The network device sends this first information to the terminal device via dedicated signaling or message; the terminal device is a terminal device in the RRC_CONNECTED state;

[0222] 703: The terminal device performs first processing according to the first information.

[0223] In the embodiments of the present application, the first information includes at least one of information indicated by a first parameter, region information, and time information.

[0224] In the embodiments of the present application, the related information of the downlink discontinuous transmission in the range of the associated cell or the beam of the associated cell includes information whether downlink transmission is prohibited or cannot be performed or is limited or is allowed or can be performed in all or part of the region of the associated cell or the beam of the associated cell.

[0225] In the embodiments of the present application, the downlink transmission is limited and / or allowed or can be performed includes at least one of the following:

[0226] Only SSB can be transmitted;

[0227] Only scheduling information of SIB can be transmitted;

[0228] Only part of the specified system message, such as SIBn, can be transmitted, for example, only SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7 can be transmitted;

[0229] Only system message can be transmitted;

[0230] Only public message can be transmitted, and the public message is used for terminal device to discover or access or measure the associated cell;

[0231] Only dedicated signaling and / or data of the terminal device can be transmitted.

[0232] In the embodiments of the present application, the first parameter is used to indicate that the associated cell or the beam of the associated cell is prohibited to access or prohibited to perform downlink transmission or cannot perform downlink transmission or downlink transmission is limited, and / or, the first parameter is used to indicate that the associated cell or the beam of the associated cell is allowed to access or allowed to perform downlink transmission or can perform downlink transmission or allowed or can perform specific downlink transmission.

[0233] In the embodiments of the present application, the first parameter includes cellBarredNTN and / or cellBarredNES and / or other parameters.

[0234] In the embodiments of the present application, the region information is used to indicate a first region within the range of the associated cell or the beam of the associated cell, and the first region is a region in which downlink transmission is prohibited and / or cannot be performed and / or is limited; and / or the region information is used to indicate a second region within the range of the associated cell or the beam of the associated cell, and the second region is a region in which downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed.

[0235] In the embodiments of the present application, the region information is represented by at least one of the following:

[0236] geographical range information of the region;

[0237] information of the beam of the associated cell corresponding to the region;

[0238] indicating that the region is the entire range of the associated cell.

[0239] In the embodiments of the present application, the geographical range information includes at least one of the following: information of a circle representing the geographical range, information of a polygon representing the geographical range, information of an ellipse representing the geographical range, and information of a boundary of the geographical range.

[0240] In the embodiments of the present application, the beam of the associated cell is a beam visible at the terminal device side.

[0241] In the embodiments of the present application, indicating that the region is the entire range of the associated cell includes: the range indicated by the region information is the entire range of the associated cell, and / or the configuration of the region information does not appear in a designated signaling or message, indicating that the region is the entire range of the associated cell, and / or the first information is at a cell level.

[0242] In the embodiments of the present application, the time information is used to indicate a duration in which downlink transmission is prohibited and / or cannot be performed and / or is limited, and / or the time information is used to indicate a duration in which downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed.

[0243] In the embodiments of the present application, the duration in the time information is a fixed duration, including a fixed time length by default at the terminal device side and / or a fixed time length indicated by the network device, and / or

[0244] The duration in the time information is a time length determined by the terminal device according to the configuration of the network device.

[0245] In an embodiment of the present application, the configuration of the network device is used to indicate a first time, the first time is a time from which downlink transmission is allowed or downlink transmission is enabled or specific downlink transmission is allowed or enabled, and / or the first time greater than zero indicates that the power of the satellite beam covering the current location has been reduced or removed, the current location prohibits downlink transmission and / or cannot perform downlink transmission and / or downlink transmission is limited.

[0246] In an embodiment of the present application, the configuration of the network device is used to indicate a second time, the second time is a dwelling time from which downlink transmission is stopped to be allowed or enabled or specific downlink transmission is stopped to be allowed or enabled.

[0247] In an embodiment of the present application, the configuration of the network device about the time information in the first information comprises at least one of the following:

[0248] absolute time,

[0249] time offset,

[0250] information about downlink discontinuous transmission,

[0251] In an embodiment of the present application, the absolute time is a time from which downlink transmission is allowed or enabled or specific downlink transmission is allowed or enabled, or a time from which downlink transmission is stopped to be allowed or enabled or specific downlink transmission is stopped to be allowed or enabled.

[0252] In an embodiment of the present application, the reference time is an epoch time of a satellite providing coverage for an associated cell or an end time of a SI window scheduling SIBn or an absolute time configured by the network device.

[0253] In an embodiment of the present application, the time offset is an offset relative to the reference time.

[0254] In an embodiment of the present application, the information about downlink discontinuous transmission comprises a period of downlink discontinuous transmission and / or a duration of downlink transmission allowed or enabled or specific downlink transmission allowed or enabled within the period of downlink discontinuous transmission.

[0255] In an embodiment of the present application, the first processing can comprise:

[0256] determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in a first downlink state for the terminal device,

[0257] The first downlink state comprises a state in which downlink transmission is prohibited and / or a state in which downlink transmission cannot be performed and / or a state in which downlink transmission is limited and / or a state in which specific downlink transmission is allowed or enabled.

[0258] For example, the downlink transmission restriction and / or the allowed or enabled specific downlink transmission includes at least one of:

[0259] Only SSB can be transmitted;

[0260] Only scheduling information of SIB can be transmitted;

[0261] Only part of specified system messages, e.g., SIBn, can be transmitted, e.g., only SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7 can be transmitted;

[0262] Only system messages can be transmitted;

[0263] Only common messages can be transmitted, which are used for terminal device discovery or access or measurement associated cells;

[0264] Only dedicated signaling and / or data of terminal device can be transmitted.

[0265] The following specifically describes how to determine whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in the first downlink state for the terminal device.

[0266] In the embodiments of the present application, it can be determined according to the value or signaling or signal of the specified parameter used to indicate the first information whether the associated cell is in the first downlink state for the terminal device;

[0267] In the embodiments of the present application, it can also be determined according to whether the terminal device receives the specified signaling or signal used to indicate the first information whether the associated cell is in the first downlink state for the terminal device;

[0268] For example, after successfully parsing the SSB (including MIB) of the associated cell, the terminal device does not receive or detect the corresponding SIBn, and then the terminal device considers that the associated cell is in the first downlink state. In addition, since the network device transmits the SSB, the power of the satellite beam used for downlink transmission can be adjusted to other satellite beams, resulting in the failure to complete the transmission of all key SIBs or scheduling information of SIBs. Therefore, the terminal device may miss the SIBs or related scheduling information transmitted by the associated cell in the new downlink available period when judging that the associated cell enters the first downlink state. Therefore, whether the terminal device receives the specified signaling or signal used to indicate the first information can also include that the terminal device continues to attempt to receive the signaling or signal for a period of time, and still does not receive the signaling or signal, and then it is determined that the specified signaling or signal used to indicate the first information is not received. The length of the time period of the attempt to receive can be a time length related to the (maximum) SSB period or the possible or known or preset downlink available interval.

[0269] In the embodiments of the present application, whether the associated cell is in the first downlink state for the terminal device can also be determined according to whether a parameter indicating the first information is contained in the signaling or signal received by the terminal device for indicating the first information. For example, after successfully parsing the SSB (including MIB) of the associated cell, if the specified parameter for indicating the first information in the SIBn received by the terminal device does not appear, the terminal device considers that the associated cell is in the first downlink state.

[0270] Taking SIB19 as an example, if the configuration for indicating the first information is added in SIB19, the terminal device can determine that the associated cell is in the first downlink state for the terminal device when one of the following conditions is met:

[0271] The configuration for indicating the first information in SIB19 indicates that the associated cell cannot perform downlink transmission or downlink transmission is prohibited or downlink transmission is restricted, for example, barred.

[0272] The configuration for indicating the first information in SIB19 does not appear.

[0273] The SIB19 cannot be detected.

[0274] SIB1 does not schedule SIB19.

[0275] In the embodiments of the present application, the terminal device can also determine whether the associated cell is in the first downlink state for the terminal device according to the received first information and the location of the terminal device.

[0276] In the embodiments of the present application, the first processing can further include:

[0277] determining a first duration of the first downlink state,

[0278] The first duration is a time length that is default for the terminal device or a time length that is determined by the terminal device according to the indication of the network device, including a time length determined according to time information contained in the first information indicated by the network device,

[0279] For example, the time length that is default for the terminal device is a time length defined by a standard or determined by terminal device implementation.

[0280] In the embodiments of the present application, the first processing can further include:

[0281] performing a second processing within the first duration in which the associated cell is determined to be in the first downlink state;

[0282] For example, the second processing includes at least one of the following processing:

[0283] exclude the associated cell from suitable cells of the terminal device,

[0284] exclude the associated cell from candidate cells for cell switching or cell selection or cell reselection of the terminal device,

[0285] exclude a satellite that causes the associated cell to be in the first state from candidate satellites for satellite switch of the terminal device,

[0286] stop and not initiate new detection or reception for downlink transmission of the associated cell,

[0287] stop and not initiate new measurement for the associated cell,

[0288] perform at least one of cell switching, cell selection, cell reselection, satellite switch and cell measurement to available candidate cells or satellites by the terminal device;

[0289] perform at least one of cell selection, cell reselection and cell measurement according to network device configuration or indication; for example, perform the processing according to indication in RRCRelease;

[0290] leave RRC CONNECTED state;

[0291] enter RRC IDLE state or RRC INACTIVE state;

[0292] enter sleep state;

[0293] ignore DRX related configuration of the terminal device, including ignoring DRX on duration of the terminal device.

[0294] In embodiments of the present application, the first processing can further include:

[0295] perform third processing after determining that the first duration of the associated cell being in the first downlink state ends.

[0296] For example, the third processing includes at least one of the following processing:

[0297] wake up and / or ignore DRX related configuration of the terminal device; for example, including waking up in a time period when the associated cell is not in the first state adjacent or next to the DRX on duration of the terminal device and the downlink transmittable time period is staggered;

[0298] entering an active state;

[0299] detecting or receiving downlink transmission of the associated cell; for example, re-detecting or attempting to detect downlink transmission of the associated cell, including SSB, SIBn, DCI, PAGING, PDSCH, etc.

[0300] receiving the latest first information;

[0301] re-determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell is in the first downlink state for the terminal device.

[0302] In the embodiments of the present application, the specific implementation of the above operation can refer to the related description in the embodiments of the first aspect, which will not be repeated here.

[0303] As can be seen from the above embodiments, the network device indicates the relevant information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell to the terminal device, so that in the case that the total transmission power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the information indicated by the network device, avoid unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and save the power consumption of the terminal device; and by excluding some candidate cells that cannot perform downlink transmission or whose downlink transmission is limited, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0304] Embodiments of the third aspect

[0305] The embodiments of the present application provide a downlink transmission device, which is arranged in a terminal device. Since the principle of solving the problem of the device is similar to the method of the embodiments of the first aspect, the specific implementation thereof can refer to the implementation of the method described in the embodiments of the first aspect, and the same or related contents will not be repeated.

[0306] FIG. 8 is a schematic diagram of a downlink transmission device according to an embodiment of the present application. As shown in FIG. 8, the downlink transmission device 800 includes:

[0307] a receiving unit 801 configured to receive first information from a network device; and / or

[0308] a processing unit 802 configured to perform first processing according to at least the first information.

[0309] In the embodiments of the present application, the first information is used to indicate the relevant information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell, and the associated cell includes a serving cell of the terminal device and / or a neighboring cell of the serving cell; and the first processing is related to the downlink transmission within the range of the associated cell or the beam of the associated cell.

[0310] In the embodiments of the present application, the first information is indicated by broadcast signaling or message, and / or the first information is indicated by dedicated signaling or message.

[0311] In the embodiments of the present application, the broadcast signaling or message includes system message and / or other broadcast signaling or message; and / or the dedicated signaling or message includes RRC message and / or MAC CE and / or DCI.

[0312] In the embodiments of the present application, the system message includes SIBn, n is a natural number.

[0313] In the embodiments of the present application, the SIBn can refer to system information in a communication system applying any stage protocol, for example, including SystemInformationBlockTypen, and / or the other broadcast signaling or message includes MBS related signaling or message.

[0314] In the embodiments of the present application, the first information includes at least one of information indicated by the first parameter, area information and time information.

[0315] In the embodiments of the present application, the related information of downlink discontinuous transmission in the range of the associated cell or the beam of the associated cell includes information whether downlink transmission is prohibited or cannot be performed or is limited or is allowed or can be performed in all or part of the area of the associated cell or the beam of the associated cell.

[0316] In the embodiments of the present application, the downlink transmission is limited and / or allowed or can be performed includes at least one of the following:

[0317] Only SSB can be transmitted;

[0318] Only scheduling information of SIB can be transmitted;

[0319] Only part of designated system message can be transmitted, for example, SIBn, for example, only SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7 can be transmitted;

[0320] Only system message can be transmitted;

[0321] Only public message can be transmitted, and the public message is used for terminal device to discover or access or measure the associated cell;

[0322] Only dedicated signaling and / or data of terminal device can be transmitted.

[0323] In the embodiments of the present application, the first parameter is used to indicate that access is prohibited or downlink transmission is prohibited or cannot be performed or is limited in the range of the associated cell or the beam of the associated cell.

[0324] In an embodiment of the present application, the first parameter is used to indicate that access is allowed or downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed within the range of the associated cell or the beam of the associated cell.

[0325] In an embodiment of the present application, the first parameter includes cellBarredNTN and / or cellBarredNES and / or other parameters.

[0326] In an embodiment of the present application, the area information is used to indicate a first area within the range of the associated cell or the beam of the associated cell, and the first area is an area in which downlink transmission is prohibited and / or cannot be performed and / or is limited.

[0327] In an embodiment of the present application, the area information is used to indicate a second area within the range of the associated cell or the beam of the associated cell, and the second area is an area in which downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed.

[0328] In an embodiment of the present application, the area information is represented by at least one of the following:

[0329] Geographical range information of the area;

[0330] Information of the beam of the associated cell corresponding to the area;

[0331] Indicating that the area is the range of the entire associated cell.

[0332] In an embodiment of the present application, the geographical range information includes at least one of the following: information of a circle representing the geographical range, information of a polygon representing the geographical range, information of an ellipse representing the geographical range, and information of the boundary of the geographical range.

[0333] In an embodiment of the present application, the beam of the associated cell is a beam visible at the terminal device side.

[0334] In an embodiment of the present application, indicating that the area is the range of the entire associated cell includes: the range indicated by the area information is the range of the entire associated cell, and / or the configuration of the area information does not appear in a specified signaling or message, indicating that the area is the range of the entire associated cell, and / or the first information is at the cell level.

[0335] In an embodiment of the present application, the time information is used to indicate a duration in which downlink transmission is prohibited and / or cannot be performed and / or is limited, and / or the time information is used to indicate a duration in which downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed.

[0336] In the embodiments of the present application, the duration in the time information is a fixed duration, and the fixed duration includes a fixed time length by default of the terminal device and / or a fixed time length indicated by the network device, and / or the duration in the time information is a time length determined by the terminal device according to the configuration of the network device.

[0337] In the embodiments of the present application, the configuration of the network device is used to indicate the first time, and the first time is a revisit time from a time when the downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed, and / or the first time greater than zero indicates that the power of the satellite beam covering the current location has been lowered or removed, and the current location prohibits the downlink transmission and / or cannot perform the downlink transmission and / or the downlink transmission is limited.

[0338] In the embodiments of the present application, the configuration of the network device is used to indicate the second time, and the second time is a dwelling time from a time when the downlink transmission is stopped to be allowed or can be performed or a specific downlink transmission is stopped to be allowed or can be performed.

[0339] In the embodiments of the present application, the configuration of the network device about the time information in the first information includes at least one of the following:

[0340] an absolute time,

[0341] a reference time,

[0342] a time offset,

[0343] information about the downlink discontinuous transmission.

[0344] In the embodiments of the present application, the absolute time is a time when the downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed, or a time when the downlink transmission is stopped to be allowed or can be performed or a specific downlink transmission is stopped to be allowed or can be performed.

[0345] In the embodiments of the present application, the reference time is an epoch time of a satellite providing coverage for an associated cell or an end time of a SI window scheduling SIBn or an absolute time configured by the network device.

[0346] In the embodiments of the present application, the time offset is an offset relative to the reference time.

[0347] In the embodiments of the present application, the information about the downlink discontinuous transmission includes a period of the downlink discontinuous transmission and / or a duration when the downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed in the period of the downlink discontinuous transmission.

[0348] In the embodiments of the present application, the first processing includes:

[0349] determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in a first downlink state for the terminal device, the first downlink state including a state of prohibiting downlink transmission and / or a state of being unable to perform downlink transmission and / or a state of downlink transmission being limited and / or a state of allowing or being able to perform specific downlink transmission.

[0350] In the embodiments of the present application, the downlink transmission being limited and / or the state of allowing or being able to perform specific downlink transmission includes at least one of the following:

[0351] only transmitting SSBs;

[0352] only transmitting scheduling information of SIBs;

[0353] only transmitting part of specified system messages, for example, SIBn, for example, only transmitting SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7;

[0354] only transmitting system messages;

[0355] only transmitting common messages, the common messages being used for the terminal device to discover or access or measure the associated cell;

[0356] only transmitting dedicated signaling and / or data of the terminal device;

[0357] In the embodiments of the present application, the first processing further includes determining a first duration of the first downlink state, the first duration being a time length determined by default by the terminal device or a time length determined by the terminal device according to an indication of the network device, including a time length determined according to time information contained in the first information in the indication of the network device,

[0358] The time length determined by default by the terminal device is a time length determined by a standard or a time length determined by implementation of the terminal device.

[0359] In the embodiments of the present application, the first processing further includes at least one of the following processing:

[0360] performing second processing when it is determined that the associated cell is in the first downlink state within the first duration;

[0361] performing third processing when it is determined that the associated cell is in the first downlink state after the first duration ends.

[0362] In the embodiments of the present application, the second processing includes at least one of the following processing:

[0363] excluding the associated cell from suitable cells of the terminal device,

[0364] excluding the associated cell from candidate cells for cell switching or cell selection or cell reselection by the terminal device,

[0365] excluding a satellite that would put the associated cell in the first state from candidate satellites for satellite switch by the terminal device,

[0366] stopping and not initiating new detection or reception of downlink transmission of the associated cell,

[0367] stopping and not initiating new measurement of the associated cell,

[0368] performing at least one of cell switching, cell selection, cell reselection, satellite switch and cell measurement by the terminal device to available candidate cells or satellites;

[0369] performing at least one of cell selection, cell reselection and cell measurement according to network device configuration or indication;

[0370] leaving RRC CONNECTED state;

[0371] entering RRC IDLE state or RRC INACTIVE state;

[0372] entering sleep state;

[0373] ignoring DRX related configuration of the terminal device, including ignoring on duration of DRX of the terminal device.

[0374] In embodiments of the present application, the third processing includes at least one of the following processing:

[0375] waking up and / or ignoring DRX related configuration of the terminal device;

[0376] entering active state;

[0377] detecting or receiving downlink transmission of the associated cell;

[0378] receiving the latest first information;

[0379] redetermining whether the associated cell or a beam of the associated cell or a specific area of the associated cell is in the first downlink state for the terminal device.

[0380] It can be known from the above embodiments that, in the case that the total transmit power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the relevant information of the downlink discontinuous transmission within the associated cell or the range of the beam of the associated cell indicated by the network device, avoid unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and save terminal device power consumption; and by excluding some candidate cells that cannot perform downlink transmission or are limited in downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0381] Embodiments of the fourth aspect

[0382] The embodiments of the present application provide an indication device of downlink transmission, which is applied to a network device. Since the principle of solving the problem of the device is similar to the method of the embodiments of the second aspect, the specific implementation thereof can refer to the implementation of the method described in the embodiments of the second aspect, and the same or related contents will not be described repeatedly.

[0383] FIG. 9 is a schematic diagram of an indication device of downlink transmission according to an embodiment of the present application. As shown in FIG. 9, the indication device 900 of downlink transmission comprises:

[0384] a generating unit 901 configured to generate first information;

[0385] a sending unit 902 configured to send the first information.

[0386] In the embodiments of the present application, the first information is used to indicate the relevant information of the downlink discontinuous transmission within the associated cell or the range of the beam of the associated cell, and the associated cell comprises a serving cell of the terminal device and / or a neighboring cell of the serving cell.

[0387] In the embodiments of the present application, the sending unit 902 indicates the first information to the terminal device through broadcast signaling or a message, and / or the sending unit 902 indicates the first information to the terminal device through dedicated signaling or a message.

[0388] For example, the sending unit 902 sends the first information through broadcast signaling or a message, so that the terminal device in the RRC_CONNECTED state, the terminal device in the RRC_IDLE state, and the terminal device in the RRC_INACTIVE state can all receive the first information.

[0389] For another example, the sending unit 902 sends the first information to the terminal device in the RRC_CONNECTED state through dedicated signaling or a message.

[0390] In the embodiments of the present application, the first information comprises at least one of information indicated by a first parameter, region information, and time information.

[0391] In the embodiments of the present application, the related information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell includes information whether downlink transmission is prohibited or cannot be performed or is limited or specific downlink transmission is allowed or can be performed within all or part of the area of the associated cell or the beam of the associated cell.

[0392] In the embodiments of the present application, the downlink transmission is limited and / or the specific downlink transmission is allowed or can be performed includes at least one of the following:

[0393] Only SSB can be transmitted;

[0394] Only scheduling information of SIB can be transmitted;

[0395] Only part of the specified system message, for example, SIBn, for example, only SIB1 and / or SIB19 and / or SIB3 and / or SIB5 and / or SIB6 and / or SIB7 can be transmitted;

[0396] Only system message can be transmitted;

[0397] Only public message can be transmitted, and the public message is used for terminal device discovery or access or measurement of the associated cell;

[0398] Only terminal device dedicated signaling and / or data can be transmitted.

[0399] In the embodiments of the present application, the first parameter is used to indicate that the associated cell or the beam of the associated cell is prohibited to access or prohibited to perform downlink transmission or cannot perform downlink transmission or downlink transmission is limited, and / or, the first parameter is used to indicate that the associated cell or the beam of the associated cell is allowed to access or allowed to perform downlink transmission or can perform downlink transmission or allowed or can perform specific downlink transmission.

[0400] In the embodiments of the present application, the first parameter includes cellBarredNTN and / or cellBarredNES and / or other parameters.

[0401] In the embodiments of the present application, the area information is used to indicate a first area within the range of the associated cell or the beam of the associated cell, and the first area is an area in which downlink transmission is prohibited and / or cannot be performed and / or is limited, and / or, the area information is used to indicate a second area within the range of the associated cell or the beam of the associated cell, and the second area is an area in which downlink transmission is allowed or can be performed or allowed or can be performed specific downlink transmission.

[0402] In the embodiments of the present application, the area information is represented by at least one of the following:

[0403] Geographical range information of the area;

[0404] information of a beam of an associated cell corresponding to the area;

[0405] indicating that the area is a range of the entire associated cell.

[0406] In the embodiments of the present application, the geographic range information includes at least one of the following: information of a circle representing the geographic range, information of a polygon representing the geographic range, information of an ellipse representing the geographic range, and information of a boundary of the geographic range.

[0407] In the embodiments of the present application, the beam of the associated cell is a beam visible at the terminal device side.

[0408] In the embodiments of the present application, the indication that the area is a range of the entire associated cell includes: the range indicated by the area information is a range of the entire associated cell, and / or the configuration of the area information does not appear in a specified signaling or message, indicating that the area is a range of the entire associated cell, and / or the first information is at a cell level.

[0409] In the embodiments of the present application, the time information is used to indicate a duration of prohibition of downlink transmission and / or inability to perform downlink transmission and / or restriction of downlink transmission, and / or the time information is used to indicate a duration of permission of downlink transmission or ability to perform downlink transmission or permission or ability to perform specific downlink transmission.

[0410] In the embodiments of the present application, the duration in the time information is a fixed duration, including a fixed time length by default of the terminal device and / or a fixed time length indicated by the network device, and / or

[0411] The duration in the time information is a time length determined by the terminal device according to the configuration of the network device.

[0412] In the embodiments of the present application, the configuration of the network device is used to indicate a first time, the first time being a time from starting to allow downlink transmission or ability to perform downlink transmission or permission or ability to perform specific downlink transmission, and / or the first time being greater than zero indicating that the power of a satellite beam covering a current position has been lowered or removed, the current position prohibiting downlink transmission and / or being unable to perform downlink transmission and / or being restricted in downlink transmission.

[0413] In the embodiments of the present application, the configuration of the network device is used to indicate a second time, the second time being a dwelling time from stopping to allow downlink transmission or ability to perform downlink transmission or permission or ability to perform specific downlink transmission.

[0414] In the embodiments of the present application, the configuration of the network device regarding the time information in the first information includes at least one of the following:

[0415] absolute time,

[0416] time offset,

[0417] information about downlink discontinuous transmission,

[0418] In the embodiments of the present application, the absolute time is a time at which downlink transmission is allowed or can be performed or a time at which specific downlink transmission is allowed or can be performed, or a time at which downlink transmission is stopped to be allowed or can be performed or a time at which specific downlink transmission is stopped to be allowed or can be performed.

[0419] In the embodiments of the present application, the reference time is an epoch time of a satellite providing coverage for the associated cell or an end time of a SI window in which SIBn is scheduled or an absolute time configured by the network device.

[0420] In the embodiments of the present application, the time offset is an offset relative to the reference time.

[0421] In the embodiments of the present application, the information about downlink discontinuous transmission includes a period of downlink discontinuous transmission and / or a duration of time during which downlink transmission is allowed or can be performed or specific downlink transmission is allowed or can be performed in the period of downlink discontinuous transmission.

[0422] As can be seen from the above embodiments, the network device indicates the terminal device with the information about downlink discontinuous transmission in the range of the associated cell or the beam of the associated cell, so that in the case that the total transmission power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the information indicated by the network device, avoid unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and save power consumption of the terminal device; and by excluding some candidate cells which cannot perform downlink transmission or are limited in downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0423] Embodiments of the fifth aspect

[0424] The embodiments of the present application provide a terminal device, which comprises the downlink transmission apparatus according to the embodiments of the third aspect.

[0425] FIG. 10 is a schematic block diagram of the system structure of the terminal device according to an embodiment of the present application. As shown in FIG. 10, the terminal device 1000 can include a processor 1010 and a memory 1020; the memory 1020 is coupled to the processor 1010. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.

[0426] In one embodiment, the functions of the downlink transmission apparatus can be integrated into the processor 1010.

[0427] The processor 1010 is configured to: receive, by the terminal device, first information from the network device, and / or perform, by the terminal device, first processing according to at least the first information, the first processing being related to downlink transmission within a range of an associated cell or a beam of the associated cell, the first information being used to indicate related information of downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell, the associated cell including a serving cell of the terminal device and / or a neighboring cell of the serving cell.

[0428] In another embodiment, the downlink transmission apparatus can be configured separately from the processor 1010, for example, the downlink transmission apparatus can be configured as a chip connected with the processor 1010, and the functions of the downlink transmission apparatus are realized through the control of the processor 1010.

[0429] As shown in FIG. 10, the terminal device 1000 can further include a communication module 1030, an input unit 1040, a display 1050, and a power supply 1060. It should be noted that the terminal device 1000 does not necessarily include all the components shown in FIG. 10; in addition, the terminal device 1000 can also include components not shown in FIG. 10, which can be referred to related technologies.

[0430] As shown in FIG. 10, the processor 1010, also sometimes referred to as a controller or operation control, can include a microprocessor or other processor device and / or a logic device, which receives input and controls the operation of various components of the terminal device 1000.

[0431] The memory 1020, for example, can be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. Various data can be stored, and programs for performing related information can also be stored. The processor 1010 can execute the programs stored in the memory 1020 to achieve information storage or processing, etc. The functions of other components are similar to the existing ones, and will not be described here. The components of the terminal device 1000 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present application.

[0432] As can be seen from the above embodiments, in the case that the total transmit power of the satellite is dynamically shared among satellite beams, the terminal device can perform corresponding processing according to the related information of downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell indicated by the network device, avoiding unnecessary downlink monitoring and unnecessary behaviors such as detection and measurement, and saving the power consumption of the terminal device; and by excluding some candidate cells that cannot perform downlink transmission or have limited downlink transmission, the time for the terminal device to access other available cells and obtain downlink services can also be shortened.

[0433] Embodiments of the sixth aspect

[0434] The embodiment of the present application provides a network device, which comprises the downlink transmission indication device according to the embodiment of the fourth aspect.

[0435] Fig. 11 is a schematic block diagram of the system structure of the network device according to the embodiment of the present application. As shown in Fig. 11, the network device 1100 can comprise a processor 1110 and a memory 1120, wherein the memory 1120 is coupled to the processor 1110. The memory 1120 can store various data, and further store a program 1130 for information processing, and execute the program 1130 under the control of the processor 1110 to receive various information sent by the terminal device and send various information to the terminal device.

[0436] In one embodiment, the function of the downlink transmission indication device can be integrated into the processor 1110.

[0437] The processor 1110 can be configured to: the network device generates first information; and the network device sends the first information, wherein the first information is used to indicate the relevant information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell, and the associated cell comprises the serving cell of the terminal device and / or the neighboring cell of the serving cell.

[0438] In another embodiment, the downlink transmission indication device can be configured separately from the processor 1110, for example, the downlink transmission indication device can be configured as a chip connected with the processor 1110, and the function of the downlink transmission indication device is realized through the control of the processor 1110.

[0439] In addition, as shown in Fig. 11, the network device 1100 can further comprise a transceiver 1140, an antenna 1150 and the like; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be described here. It is worth noting that the network device 1100 does not necessarily comprise all the components shown in Fig. 11; in addition, the network device 1100 can also comprise components not shown in Fig. 11, which can be referred to the prior art.

[0440] As known from the above embodiment, the network device indicates the relevant information of the downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell to the terminal device, so that in the case that the total transmission power of the satellite is dynamically shared among the satellite beams, the terminal device can perform corresponding processing according to the information indicated by the network device, avoid unnecessary downlink monitoring and detection, measurement and other unnecessary behaviors, and save the power consumption of the terminal device; and by excluding some candidate cells which cannot perform downlink transmission or are limited in downlink transmission, the time for the terminal device to access other available cells and obtain downlink service can also be shortened.

[0441] Embodiment of the seventh aspect

[0442] Embodiments of the present application provide a communication system, comprising the terminal device according to the embodiments of the fifth aspect and / or the network device according to the embodiments of the sixth aspect. For specific content, refer to the description in the embodiments of the fifth aspect and the embodiments of the sixth aspect.

[0443] For example, the structure of the communication system can refer to FIG. 3. As shown in FIG. 3, the communication system 100 comprises a network device 101 and a terminal device 102. The terminal device 102 can be the same as the terminal device described in the embodiments of the fifth aspect, and / or the network device 101 can be the same as the network device described in the embodiments of the sixth aspect. The repeated content will not be described herein.

[0444] The apparatus and method described above can be implemented by hardware, or by a combination of hardware and software. The present application relates to a computer readable program, which, when executed by a logic component, enables the logic component to implement the apparatus or constituent components described above, or enables the logic component to implement the various methods or steps described above. The logic component is, for example, a field programmable logic component, a microprocessor, a processor used in a computer, etc. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0445] The method / apparatus described in combination with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional blocks shown in FIG. 8 and / or a combination of one or more functional blocks can correspond to each software module of the computer program flow, or to each hardware module. These software modules can correspond to each step shown in FIG. 4, respectively. These hardware modules can be implemented by, for example, fixing the software modules using a field programmable gate array (FPGA).

[0446] The software modules can be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software modules can be stored in the memory of the mobile terminal, or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a MEGA-SIM card or a large capacity flash memory device, the software modules can be stored in the MEGA-SIM card or the large capacity flash memory device.

[0447] One or more of the functional blocks described in FIG. 8 and / or one or more combinations of the functional blocks can be implemented as a general- purpose processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any appropriate combination thereof, for performing the functions described in this disclosure. One or more of the functional blocks described in FIG. 8 and / or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0448] The present application has been described in conjunction with the specific embodiments thereof. It is to be understood, however, that the description is not intended to limit the application to the specific embodiments described. Various alterations, modifications and improvements will become apparent to those skilled in the art from the foregoing description, which is intended to be illustrative only. Accordingly, the application is intended to embrace all alterations, modifications and improvements that have been made, or are to be made, by those skilled in the art.

[0449] According to the various embodiments disclosed in the embodiments of the present application, the following notes are also disclosed:

[0450] 1. An indication method of downlink transmission, the method is applied to a network device, and the method comprises:

[0451] The network device generates first information, wherein the first information is used to indicate related information of downlink discontinuous transmission in a range of an associated cell or a beam of the associated cell, and the associated cell comprises a serving cell of a terminal device and / or a neighboring cell of the serving cell.

[0452] The network device transmits the first information.

[0453] The first information comprises at least one of information indicated by a first parameter, region information and time information, and / or.

[0454] The related information of downlink discontinuous transmission in the range of the associated cell or the beam of the associated cell comprises information about whether downlink transmission is prohibited, whether downlink transmission cannot be performed, whether downlink transmission is limited or whether specific downlink transmission is allowed or can be performed in all or part of regions of the associated cell or the beam of the associated cell.

[0455] 2. The method according to note 1, wherein,

[0456] The downlink transmission is limited and / or the specific downlink transmission is allowed or can be performed comprises at least one of the following:

[0457] Only SSB can be transmitted.

[0458] only scheduling information of SIBs can be transmitted;

[0459] only part of specified system information can be transmitted;

[0460] only system information can be transmitted;

[0461] only common information for the terminal device to discover or access or measure the associated cell can be transmitted;

[0462] only dedicated signaling and / or data of the terminal device can be transmitted.

[0463] 3. The method according to the preceding paragraph, wherein,

[0464] the first parameter is used to indicate that access is prohibited or downlink transmission is prohibited or cannot be performed or is limited in the range of the associated cell or the beam of the associated cell, and / or,

[0465] the first parameter is used to indicate that access is allowed or downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed in the range of the associated cell or the beam of the associated cell, and / or,

[0466] the first parameter comprises cellBarredNTN and / or cellBarredNES and / or other parameters.

[0467] 4. The method according to the preceding paragraph, wherein,

[0468] the area information is used to indicate a first area in the range of the associated cell or the beam of the associated cell, and the first area is an area in which downlink transmission is prohibited and / or cannot be performed and / or is limited.

[0469] the area information is used to indicate a second area in the range of the associated cell or the beam of the associated cell, and the second area is an area in which downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed.

[0470] 5. The method according to the preceding paragraph, wherein the area information is represented by at least one of the following:

[0471] geographical range information of the area;

[0472] information of the beam of the associated cell corresponding to the area;

[0473] information indicating that the area is the range of the entire associated cell.

[0474] 6. The method according to the preceding paragraph, wherein,

[0475] The geographic range information includes at least one of related information of a circle representing a geographic range, related information of a polygon representing a geographic range, related information of an ellipse representing a geographic range, and related information of a boundary of a geographic range, and / or,

[0476] The beam of the associated cell is a beam visible to the terminal device side, and / or,

[0477] The indication that the area is the range of the entire associated cell includes that the range indicated by the area information is the range of the entire associated cell, and / or, the configuration of the area information does not appear in the specified signaling or message, indicating that the area is the range of the entire associated cell, and / or, the first information is at the cell level.

[0478] 7. The method of clause 1, wherein,

[0479] The time information is used to indicate the duration of the prohibition of downlink transmission and / or the inability to perform downlink transmission and / or the restriction of downlink transmission, and / or the time information is used to indicate the duration of the permission or ability to perform downlink transmission or the permission or ability to perform specific downlink transmission.

[0480] 8. The method of clause 7, wherein,

[0481] The duration in the time information is a fixed duration, including a fixed time length by default of the terminal device and / or a fixed time length indicated by the network device, and / or

[0482] The duration in the time information is a time length determined by the terminal device according to the configuration of the network device.

[0483] 9. The method of clause 8, wherein,

[0484] The configuration of the network device is used to indicate a first time, which is the time from the start of the permission or ability to perform downlink transmission or the permission or ability to perform specific downlink transmission, and / or the first time greater than zero indicates that the power of the satellite beam covering the current location has been lowered or removed, and the current location prohibits downlink transmission and / or is unable to perform downlink transmission and / or is restricted in downlink transmission, and / or,

[0485] The configuration of the network device is used to indicate a second time, which is the dwelling time from the stop of the permission or ability to perform downlink transmission or the permission or ability to perform specific downlink transmission.

[0486] 10. The method of clause 8, wherein,

[0487] The configuration of the network device about the time information in the first information comprises at least one of:

[0488] absolute time,

[0489] time offset,

[0490] related information of downlink discontinuous transmission,

[0491] The absolute time is a time of starting to allow downlink transmission or being able to conduct downlink transmission or allowing or being able to conduct specific downlink transmission, or a time of stopping to allow downlink transmission or being able to conduct downlink transmission or allowing or being able to conduct specific downlink transmission, and / or,

[0492] The reference time is an epoch time of a satellite providing coverage for the associated cell or an end time of a SI window scheduling SIBn or an absolute time configured by the network device, and / or,

[0493] The time offset is an offset relative to the reference time, and / or,

[0494] The related information of downlink discontinuous transmission comprises a period of downlink discontinuous transmission and / or a duration of allowing or being able to conduct downlink transmission or allowing or being able to conduct specific downlink transmission in the period of downlink discontinuous transmission.

Claims

1. An apparatus for downlink transmission, the apparatus being applied to a terminal device, the apparatus comprising: a receiving unit configured to receive first information from a network device, the first information being used to indicate relevant information of downlink discontinuous transmission within a range of an associated cell or a beam of the associated cell, the associated cell comprising a serving cell of the terminal device and / or a neighboring cell of the serving cell; and / or, a processing unit configured to perform a first processing according to at least the first information, the first processing being related to the downlink transmission within the range of the associated cell or the beam of the associated cell.

2. The apparatus according to claim 1, wherein, the first information is indicated by broadcast signaling or messages, and / or, the first information is indicated by dedicated signaling or messages.

3. The apparatus according to claim 2, wherein, the broadcast signaling or messages comprise system messages and / or other broadcast signaling or messages; and / or, the dedicated signaling or messages comprise RRC messages and / or MAC CEs and / or DCIs, the system messages comprise SIBn, n being a natural number, the SIBn comprising any system information in a communication system applying any stage protocol, and / or, the other broadcast signaling or messages comprise MBS related signaling or messages.

4. The apparatus according to claim 1, wherein, the first information comprises at least one of information indicated by a first parameter, region information and time information, and / or, the relevant information of downlink discontinuous transmission within the range of the associated cell or the beam of the associated cell comprises information of whether downlink transmission is prohibited or cannot be performed or is limited or is allowed or can be performed in all or part of regions of the associated cell or the beam of the associated cell, the downlink transmission being limited and / or the allowed or can be performed comprises at least one of the following: only SSBs can be transmitted; only scheduling information of SIBs can be transmitted; only part of designated system messages can be transmitted; only system messages can be transmitted; only common messages for the terminal device to discover or access or measure the associated cell can be transmitted; only dedicated signaling and / or data of the terminal device can be transmitted.

5. The apparatus according to claim 4, wherein, the first parameter is used to indicate that access or downlink transmission is prohibited or cannot be performed or the downlink transmission is limited within the range of the associated cell or the beam of the associated cell, and / or, the first parameter is used to indicate that access or downlink transmission is allowed or can be performed or the allowed or can be performed comprises at least one of the following: within the range of the associated cell or the beam of the associated cell, only SSBs can be transmitted; within the range of the associated cell or the beam of the associated cell, only scheduling information of SIBs can be transmitted; within the range of the associated cell or the beam of the associated cell, only part of designated system messages can be transmitted; within the range of the associated cell or the beam of the associated cell, only system messages can be transmitted; within the range of the associated cell or the beam of the associated cell, only common messages for the terminal device to discover or access or measure the associated cell can be transmitted; within the range of the associated cell or the beam of the associated cell, only dedicated signaling and / or data of the terminal device can be transmitted, the first parameter comprises cellBarredNTN and / or cellBarredNES and / or other parameters.

6. The apparatus according to claim 4, wherein, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The region information is used to indicate a first region within a range of the associated cell or a beam of the associated cell, the first region being a region where downlink transmission is prohibited and / or cannot be performed and / or the downlink transmission is limited, and / or The region information is used to indicate a second region within a range of the associated cell or a beam of the associated cell, the second region being a region where downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed.

7. The apparatus of claim 6, wherein, The region information is represented by at least one of the following: Geographical range information of the region; Information of a beam of the associated cell corresponding to the region; Indicating that the region is the entire range of the associated cell.

8. The apparatus of claim 7, wherein The geographical range information includes at least one of related information of a circle representing a geographical range, related information of a polygon representing a geographical range, related information of an ellipse representing a geographical range, and related information of a boundary of a geographical range, and / or The beam of the associated cell is a beam visible on the terminal device side, and / or Indicating that the region is the entire range of the associated cell includes that the range indicated by the region information is the entire range of the associated cell, and / or the configuration of the region information does not appear in a specified signaling or message, indicating that the region is the entire range of the associated cell, and / or the first information is at a cell level.

9. The apparatus of claim 4, wherein The time information is used to indicate a duration of time when downlink transmission is prohibited and / or cannot be performed and / or the downlink transmission is limited, and / or the time information is used to indicate a duration of time when downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed.

10. The apparatus of claim 9, wherein The duration of time in the time information is a fixed duration, including a fixed time length by default of the terminal device and / or a fixed time length indicated by the network device, and / or The duration of time in the time information is a time length determined by the terminal device according to a configuration of the network device.

11. The apparatus of claim 10, wherein The configuration of the network device is used to indicate a first time, the first time being a revisit time from a time when downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed, and / or the first time being greater than zero indicates that the power of a satellite beam covering a current location has been lowered or removed, the current location being a location where downlink transmission is prohibited and / or cannot be performed and / or the downlink transmission is limited, And / or The configuration of the network device is used to indicate a second time, the second time being a dwelling time from a time when downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed.

12. The apparatus of claim 10, wherein The configuration of the network device regarding the time information in the first information includes at least one of the following: absolute time, reference time, time offset, information about downlink discontinuous transmission, the absolute time is a time at which downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed, or a time at which downlink transmission is stopped to be allowed or can be performed or a specific downlink transmission is stopped to be allowed or can be performed, and / or, the reference time is an epoch time of a satellite providing coverage for the associated cell or an end time of a SI window scheduling SIBn or an absolute time configured by a network device, and / or, the time offset is an offset relative to the reference time, and / or, the information about downlink discontinuous transmission includes a period of downlink discontinuous transmission and / or a duration of time during which downlink transmission is allowed or can be performed or a specific downlink transmission is allowed or can be performed in the period of downlink discontinuous transmission.

13. The apparatus of claim 1, wherein, The first processing includes at least one of the following processes: determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell corresponding to the first information is in a first downlink state for the terminal device, the first downlink state including a state in which downlink transmission is prohibited and / or a state in which downlink transmission cannot be performed and / or a state in which downlink transmission is limited and / or a state in which a specific downlink transmission is allowed or can be performed, the downlink transmission being limited and / or the specific downlink transmission being allowed or can be performed includes at least one of the following: only SSB can be transmitted; only scheduling information of SIB can be transmitted; only part of specified system messages can be transmitted; only system messages can be transmitted; only common messages can be transmitted, the common messages being used for the terminal device to discover or access or measure the associated cell; only dedicated signaling and / or data of the terminal device can be transmitted; and / or, determining a first duration of the first downlink state, the first duration being a time length by default of the terminal device or a time length determined by the terminal device according to an indication of the network device, the time length determined according to the indication of the network device including a time length determined according to time information contained in the first information indicated by the network device, the time length by default of the terminal device being a time length defined by a standard or determined by implementation of the terminal device.

14. The apparatus of claim 13, wherein, The first processing further includes at least one of the following processes: performing a second processing when it is determined that the associated cell is within the first duration of the first downlink state; performing a third processing when it is determined that the first duration of the first downlink state ends.

15. The apparatus of claim 14, wherein, The second processing includes at least one of the following processes: excluding the associated cell from suitable cells of the terminal device, excluding the associated cell from candidate cells for cell switching or cell selection or cell reselection of the terminal device, excluding a satellite causing the associated cell to be in the first state from candidate satellites for satellite switching of the terminal device, stopping and not initiating new detection or reception of downlink transmission of the associated cell, stopping and not initiating new measurement of the associated cell, performing at least one of cell switching, cell selection, cell reselection, satellite switch and cell measurement to available candidate cells or satellites by the terminal device; performing at least one of cell selection, cell reselection and cell measurement according to the processing configured or instructed by the network device; leaving RRC CONNECTED state; entering RRC IDLE state or RRC INACTIVE state; entering sleep state; ignoring DRX related configuration of the terminal device, including ignoring on duration of DRX of the terminal device.

16. The apparatus of claim 14, wherein, the third processing includes at least one of the following processing: waking up and / or ignoring DRX related configuration of the terminal device; entering active state; detecting or receiving downlink transmission of the associated cell; receiving the latest first information; re-determining whether the associated cell or the beam of the associated cell or the specific area of the associated cell is in the first downlink state for the terminal device.

17. An indication apparatus of downlink transmission, the apparatus is applied to a network device, the apparatus includes: a generating unit which generates first information, the first information is used to indicate relevant information of downlink discontinuous transmission within an associated cell or a beam of the associated cell, the associated cell includes a serving cell of a terminal device and / or a neighboring cell of the serving cell; a sending unit which sends the first information.

18. The apparatus according to claim 17, wherein, the sending unit indicates the first information to the terminal device through broadcast signaling or message, and / or, the sending unit indicates the first information to the terminal device through dedicated signaling or message.

19. The apparatus according to claim 18, wherein, the broadcast signaling or message includes system information and / or other broadcast signaling or message; and / or, the dedicated signaling or message includes RRC message and / or MAC CE and / or DCI, the system message includes SIBn, n is a natural number, the SIBn includes any system information in a communication system applying any stage protocol, and / or, the other broadcast signaling or message includes MBS related signaling or message.

20. The apparatus according to claim 18, wherein, the sending unit sends the first information to the terminal device in RRC CONNECTED state through dedicated signaling or message.

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