SSB configuration method and apparatus

Abstract

An SSB configuration method and an apparatus. The method comprises: a network device generates first configuration information, the first configuration information comprising configuration information of an SSB, and the SSB being used for a terminal device to access and / or measure a cell in which downlink transmission is discontinuous; and the network device sends the first configuration information to the terminal device.

Description

Method and apparatus for configuring SSB 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 satellite, the larger the earth surface it can cover.

[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 the terminal devices at different positions are required to receive signals from the satellite with a signal strength meeting the requirements of 5MH bandwidth transmission, the total transmit power of the satellite needs to be at least more than 10 kW. This is very difficult to achieve for a satellite using solar energy as the energy supply. For a satellite at a higher orbit, the ground area it covers can be larger, and the requirement for the total transmit 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 conditions of limited satellite power or limited feeder link bandwidth. 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 beam or narrow beam). The satellite can not activate all the satellite beams in the footprint at the same time, or can only activate part of the satellite beams with a lower than nominal EIRP (Effective Isotropic Radiated Power) power density. In this way, the transmit 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, 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 hatching in FIG. 2) is determined by the beams (dot hatching 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 in 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 on the relevant satellite beam or the activation condition, when the relevant beam is not activated or activated at a lower than the nominal equivalent isotropic radiated power (EIRP) density of the satellite beam (low power activation), the coverage area of the beam cannot perform any downlink transmission or is prohibited from downlink transmission, or the downlink transmission is limited, in addition to the downlink data service transmission being affected, the basic public messages or signaling may also be unable to be sent, including SSB, SIB, etc., which makes it difficult for terminal devices to obtain the basic information or signals of the satellite cell, or even unable to know the existence of the satellite cell, which will seriously affect the experience of terminal devices accessing the communication network through the NTN.

[0007] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical solutions of the present application and for the convenience of understanding by those skilled in the art. The above technical solutions cannot be considered as known to those skilled in the art only because they are described in the background section of the present application.

[0008] SUMMARY

[0009] Currently, according to the working objectives of the Rel-19 NR NTN downlink coverage enhancement technology at the RAN#104 meeting, the period of the SSB is considered to be extended, so that the terminal device within the satellite footprint can still detect the satellite cell in the case of dynamic power sharing of the satellite. In addition to the SSB containing the MIB, the terminal device also needs to receive other public messages or signals of the cell to access the NTN, such as SIB1, SIB19, and CORESET0 containing SIB scheduling information (DCI), etc. Considering that the physical channels for transmitting these downlink signaling or messages and the physical channels for transmitting the SSB are different, for example, DCI is transmitted using PDCCH, SIB is transmitted using PDSCH, and SSB is transmitted using PBCH, there is a possibility that the network will only activate the PBCH transmission when the power is limited. In addition, from the time dimension, the transmission of the SIB message associated with the SSB will be delayed relative to the transmission of the SSB, so there may be a situation where the SIB of the satellite cell cannot be transmitted after the SSB is successfully transmitted because the power allocated on the relevant satellite beam is tuned away to other satellite beams.

[0010] FIG. 3 is a timing diagram of transmitting public messages or signals. As shown in FIG. 3, after the SSB is successfully transmitted, the SIB of the satellite cell cannot be transmitted because the power allocated on the relevant satellite beam is tuned away to other satellite beams.

[0011] According to the current progress of RAN2 discussion, the specification work of the Rel-19 downlink enhancement technology of NR NTN is still in the stage of clarifying related concepts and application scenarios, and needs to wait for the performance evaluation results and related conclusions of RAN1 for different scenarios to decide whether to extend the current SSB period and the possible configuration method. The related specification work has not yet begun.

[0012] In the proposal of the RAN1 working group, the related research of the SSB period is based on some specific assumptions, such as the one-to-one correspondence between the SSB beam and the satellite beam, the configuration of four SSBs for each satellite cell, and the transmission of the subsequent public messages of the SSB, such as the key SIB affecting the access to the NTN, during the same beam activation period of the SSB transmission, etc. These assumptions may not always hold true in implementation and cannot be the only possibility for researching SSB-related enhancements.

[0013] The inventors found that there is currently a lack of configuration method for the SSB of the downlink transmission discontinuous cell, which may cause the terminal device to fail to detect the SSB information in time and fail to detect the cell within the default time, thereby missing the satellite cell service.

[0014] To solve one or more of the above problems, embodiments of the present application provide a method and apparatus for configuring SSB.

[0015] According to an aspect of embodiments of the present application, there is provided an apparatus for configuring SSB. The apparatus is applied to a network device, and includes a generating unit configured to generate first configuration information, the first configuration information including configuration information of SSB, the SSB being used for a terminal device to access and / or measure a downlink transmission discontinuous cell; and a sending unit configured to send the first configuration information to the terminal device.

[0016] According to another aspect of embodiments of the present application, there is provided an apparatus for cell access and / or cell measurement. The apparatus is applied to a terminal device, and includes a receiving unit configured to receive first configuration information from a network device, the first configuration information including configuration information of SSB, the SSB being used for the terminal device to access and / or measure a downlink transmission discontinuous cell; and a processing unit configured to access and / or measure the downlink transmission discontinuous cell according to the first configuration information.

[0017] According to yet another aspect of embodiments of the present application, there is provided a communication system including a network device and / or a terminal device. The network device includes the above-mentioned apparatus for configuring SSB according to embodiments of the present application, and the terminal device includes the above-mentioned apparatus for cell access and / or cell measurement according to embodiments of the present application.

[0018] According to yet another aspect of embodiments of the present application, there is provided a method for configuring SSB. The method is applied to a network device, and includes that the network device generates first configuration information, the first configuration information including configuration information of SSB, the SSB being used for a terminal device to access and / or measure a downlink transmission discontinuous cell; and the network device sends the first configuration information to the terminal device.

[0019] According to yet another aspect of embodiments of the present application, there is provided a method for cell access and / or cell measurement. The method is applied to a terminal device, and includes that the terminal device receives first configuration information from a network device, the first configuration information including configuration information of SSB, the SSB being used for the terminal device to access and / or measure a downlink transmission discontinuous cell; and the terminal device accesses and / or measures the downlink transmission discontinuous cell according to the first configuration information.

[0020] According to yet another aspect of embodiments of the present application, there is provided a computer readable program, which, when executed in an apparatus for configuring SSB or a network device, causes the apparatus for configuring SSB or the network device to perform the above-mentioned method for configuring SSB according to embodiments of the present application.

[0021] According to a further aspect of the embodiments of the present application, a computer readable program is provided, which, when executed in a cell access and / or cell measurement apparatus or a terminal device, causes the cell access and / or cell measurement apparatus or the terminal device to perform the above-mentioned method of cell access and / or cell measurement according to the embodiments of the present application.

[0022] According to a further aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, which causes a SSB configuration apparatus or a network device to perform the above-mentioned method of SSB configuration according to the embodiments of the present application.

[0023] According to a further aspect of the embodiments of the present application, a storage medium storing a computer readable program is provided, which causes a cell access and / or cell measurement apparatus or a terminal device to perform the above-mentioned method of cell access and / or cell measurement according to the embodiments of the present application.

[0024] 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 configuration of the SSBs for the terminal device to access and / or measure the discontinuous cell downlink transmission by the network device enables the inventory or future terminal devices to timely detect the SSB information, avoiding the problem of missing the satellite cell service due to the failure to detect the cell within the default time.

[0025] Specific embodiments of the application are disclosed herein, and yet other embodiments will be apparent and / or readily derived from the description and figures. It should be understood that the description and figures are not to constrain the scope of the application. The scope of the application includes many changes, modifications and equivalents of the embodiments described and / or illustrated herein, as will be apparent and / or readily derived from the description and figures, including combinations of features of the embodiments with each other and with features not expressly described above and / or shown in the figures.

[0026] Features described and / or illustrated with respect to one implementation can be used in one or more other implementations, in combination with other features in those other implementations, or in place of other features in those other implementations.

[0027] It should be emphasized that the term comprises / comprising / comprising, when used herein, means the presence of a stated feature, integer, step or component, but does not preclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF DRAWINGS

[0028] Elements and features described with respect to one drawing or implementation of the embodiments of the present application can be combined with elements and features illustrated in one or more other drawings or implementations. Also, in the drawings, like reference numerals designate corresponding parts throughout the several views, and can be used to indicate corresponding parts in more than one implementation.

[0029] 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:

[0030] FIG. 1 is a schematic diagram of the earth surface coverage of a certain altitude orbit satellite;

[0031] FIG. 2 is a schematic diagram of the coverage area of a satellite cell;

[0032] FIG. 3 is a timing diagram of transmitting a common message or signal;

[0033] FIG. 4 is a schematic diagram of a communication system according to an embodiment of the application;

[0034] FIG. 5 is a schematic diagram of a configuration method of an SSB according to an embodiment of the application;

[0035] FIG. 6 is a timing diagram of downlink transmission according to an embodiment of the application;

[0036] FIG. 7 is another timing diagram of downlink transmission according to an embodiment of the application;

[0037] FIG. 8 is yet another timing diagram of downlink transmission according to an embodiment of the application;

[0038] FIG. 9 is a timing relationship diagram of a first time period and a second time period according to an embodiment of the application;

[0039] FIG. 10 is another timing relationship diagram of a first time period and a second time period according to an embodiment of the application;

[0040] FIG. 11 is a timing diagram of SSB transmission according to an embodiment of the application;

[0041] FIG. 12 is another timing diagram of SSB transmission according to an embodiment of the application;

[0042] FIG. 13 is a schematic diagram of a method of cell access and / or cell measurement according to an embodiment of the application;

[0043] FIG. 14 is an interaction diagram of a configuration method of an SSB according to an embodiment of the application;

[0044] FIG. 15 is a schematic diagram of a configuration apparatus of an SSB according to an embodiment of the application;

[0045] FIG. 16 is a schematic diagram of an apparatus of cell access and / or cell measurement according to an embodiment of the application;

[0046] Fig. 17 is a schematic block diagram of a system configuration of a network device according to an embodiment of the present application;

[0047] Fig. 18 is a schematic block diagram of a system configuration of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The foregoing and other features of the present 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 particular embodiments described but includes variations to the technique that would be apparent to one skilled in the art. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0049] 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 temporal order of the elements, and the elements should not be limited by these 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 feature, element, component, or assembly, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0050] In the embodiments of the present application, the singular forms "a", "an", and "the" include plural forms unless the context clearly indicates otherwise. The term "said" should be understood to include both the singular and the plural form, 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.

[0051] In the embodiments of the present application, the term "communication network" or "wireless communication network" can refer to a network that complies with any communication standard, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

[0052] Also, communication between devices in a communication system can be in accordance with communication protocols of any stage, for example, can include but are 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 to be developed communication protocols.

[0053] In 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 user equipment to a communication network and provides services for the user equipment. The network device or network node can include but is not limited to the following devices: "node" and / or "donor" under 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), etc.

[0054] Among them, 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., in addition to 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, each base station can provide communication coverage for a specific geographic area, for example, a 5G base station gNB can include a gNB CU and one or more gNB DUs, where CU / DU is a logical node of gNB with part of the function of 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.

[0055] In the embodiments of the present application, the term "user equipment" (UE) refers to 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, and the like. For example, a terminal equipment served by an IAB node or an IAB donor under an IAB architecture.

[0056] The terminal equipment can include, but is not limited to, the following devices: 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 computer, a cordless phone, a smart phone, a smart watch, a digital camera, and the like.

[0057] For another example, in an Internet of Things (IoT) scenario or the like, the terminal equipment can also be a machine or device that performs monitoring or measurement, which can include, but is not limited to, the following devices: 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.

[0058] In the embodiments of the present application, "when", "in the case of", "for the case of", and "if" all mean based on a certain condition or state, and in addition, these expressions can be replaced with each other.

[0059] The following describes the scenarios of the embodiments of the present application by way of examples, but the present application is not limited thereto.

[0060] FIG. 4 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates a case taking a terminal equipment and a network device as examples. As shown in FIG. 4, the communication system 100 can include a network device 101 and a terminal equipment 102. For simplicity, FIG. 4 only takes one terminal equipment and one network device as examples for illustration, but the embodiments of the present application are not limited thereto.

[0061] In the 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), etc.

[0062] In the embodiments of the present application, the high-layer signaling can be, for example, radio resource control (RRC) signaling; for example, referred to as an RRC message, for example, including MIB, system information, dedicated RRC messages; or referred to as an RRC IE. The high-layer signaling can 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.

[0063] 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 to the present application.

[0064] Embodiments of the first aspect

[0065] The embodiments of the present application provide a configuration method of SSB, which is applied to a network device, for example, the network device 101 in FIG. 4.

[0066] FIG. 5 is a schematic diagram of a configuration method of SSB according to an embodiment of the present application. As shown in FIG. 5, the method includes:

[0067] 501: The network device generates first configuration information; and

[0068] 502: The network device transmits the first configuration information to the terminal device.

[0069] In the embodiments of the present application, the first configuration information includes configuration information of SSB, and the SSB is used for the terminal device to access and / or measure a downlink transmission discontinuous cell.

[0070] Since the satellite beams are invisible to the terminal device, the network device can internally associate the satellite beams to the cells and / or cell beams, implement the mapping between the satellite beams and the cells and / or cell beams, and the satellite beams associated with the cells and / or cell beams are the beams that implement the downlink coverage of the entire or partial area of the cell or cell beam, and the cell or cell beam can perform downlink transmission only during the period when the associated satellite beam is activated.

[0071] In this way, in the case that the total transmit power of the satellite is dynamically shared among the satellite beams, by the network device configuring the SSB of the downlink transmission discontinuous cell for the terminal device to access and / or measure, the inventory or future terminal device can timely detect the SSB information, and the problem of missing the satellite cell service due to the failure to detect the cell within the default time is avoided.

[0072] In operation 501, the network device generates first configuration information, and the first information includes the configuration information of the SSB, and the SSB is used for the terminal device to access and / or measure the downlink transmission discontinuous cell.

[0073] In the embodiments of the present application, the "downlink transmission discontinuous" can also be replaced by "downlink discontinuous transmission" or "discontinuous transmission" or Downlink DTX (Discontinous Transmission) or DTX (Discontinous Transmission).

[0074] In the embodiments of the present application, the downlink transmission discontinuous cell, for example, refers to that the downlink transmission is prohibited, or cannot be performed, or is limited, or only specific downlink transmission is allowed in the entire or partial area of the cell.

[0075] For example, for the cell, there is a specific time period, and in the specific time period, the downlink transmission is prohibited, or cannot be performed, or is limited, or only specific downlink transmission is allowed in the entire or partial area of the cell.

[0076] In the embodiments of the present application, the downlink transmission discontinuous cell is, for example, a downlink transmission discontinuous NTN cell.

[0077] In the embodiments of the present application, the configuration information of the SSB includes information of a first period, and the first period is a period in which the SSB transmission is enabled.

[0078] In addition, the configuration information of the SSB can also include the duration information, for example, the duration length, of the SSB transmission in the first period.

[0079] In addition, the configuration information of the SSBs can further include periodicity information of the SSBs or transmission frequency information of the SSBs in the duration in which the SSB transmission is enabled.

[0080] In the embodiments of the present application, the first period can be associated with the time in which the cell or the beam of the cell is capable of downlink transmission, for example, the time domain resource for transmitting the SSB is within the time in which the cell or the beam of the cell is capable of downlink transmission; the first period can also be independent of the time in which the cell or the beam of the cell is capable of downlink transmission.

[0081] In the embodiments of the present application, the time in which the downlink transmission is capable can include the first time period and / or the second time period.

[0082] In the embodiments of the present application, in the first implementation, the first period is associated with the first time period and / or the second time period, or, in the second implementation, the first period is independent of the first time period and / or the second time period, that is, not related.

[0083] In the embodiments of the present application, in the first time period, only specific downlink transmission is capable, and the specific downlink transmission includes downlink transmission of a common message; for example, the common message at least includes necessary information for the terminal device to discover the cell or perform initial access.

[0084] In the embodiments of the present application, in the second time period, normal downlink transmission is capable; for example, normal transmission including dedicated signaling or data of the terminal device is capable.

[0085] First, the specific content of the first implementation, that is, the first period is associated with the first time period and / or the second time period, is described.

[0086] In the embodiments of the present application, the time domain resource for transmitting the SSB is within the first time period and / or the second time period.

[0087] In the embodiments of the present application, the first period can also depend on the second period, and the second period is the period in which the first time period and / or the second time period appears.

[0088] For example, the time domain resource for transmitting the SSB is within the first time period and / or the second time period, including: the period of the SSB is the same as the period in which the SSB transmission is enabled (that is, the first period), and the duration in which the SSB transmission is enabled is within the first time period and / or the second time period, wherein in each duration in which the SSB transmission is enabled, the SSB with the first index is transmitted once.

[0089] In addition, the first period depends on the second period, which can include: the first period is the same as the second period, or the first period is an integer multiple of the second period.

[0090] FIG. 6 is a timing diagram of downlink transmission according to an embodiment of the present application. As shown in FIG. 6, the first period T1 is the same as the second period T2, i.e., the period of enabling SSB transmission is the same as the period of the first time period and / or the second time period. In addition, the SSB with the first index is transmitted once in each duration of enabling SSB transmission, i.e., the period of SSB is the same as the first period.

[0091] FIG. 7 is another timing diagram of downlink transmission according to an embodiment of the present application. As shown in FIG. 7, the first period T1 is twice the second period T2, i.e., the period of enabling SSB transmission is twice the period of the first time period and / or the second time period. In addition, the SSB with the first index is transmitted once in each duration of enabling SSB transmission, i.e., the period of SSB is the same as the first period.

[0092] For another example, the time-domain resource of transmitting SSB in the first time period and / or the second time period includes: the duration of enabling SSB transmission in the first time period and / or the second time period, wherein at least twice the SSB with the first index is transmitted in each duration of enabling SSB transmission with a third period, i.e., the period of SSB in each duration of enabling SSB transmission is the third period.

[0093] FIG. 8 is still another timing diagram of downlink transmission according to an embodiment of the present application. As shown in (a) of FIG. 8, the first period T1 is the same as the second period T2, i.e., the period of enabling SSB transmission is the same as the period of the first time period and / or the second time period. In addition, at least twice the SSB with the first index is transmitted in each duration of enabling SSB transmission, and the period of the at least twice SSB with the first index is the third period T3.

[0094] In addition, the number of times of transmitting SSB in each duration of enabling SSB transmission is exemplarily shown as 4 times in FIG. 8, but can also be 2 times or more than 2 times, and the embodiment of the present application does not limit the specific number.

[0095] In addition, for the case shown in FIG. 8, the first period T1 can also be an integer multiple of the second period T2.

[0096] In addition, the duration of the on-SSB transmission is in the first time period and / or the second time period, where for each duration of the on-SSB transmission, the duration of the on-SSB transmission is included in the length of the first time period and / or the second time period in which the duration of the on-SSB transmission is located, as shown in (a) of FIG. 8. In addition, it can also include only a part of the first time period and / or the second time period in which the duration of the on-SSB transmission is located, as shown in (b) of FIG. 8, 2 SSBs are transmitted in each duration of the on-SSB transmission, and each duration of the on-SSB transmission only occupies a part of the corresponding first time period and / or second time period (the end time point of each duration of the on-SSB transmission is represented by a dashed line in the figure).

[0097] In an embodiment of the present application, for example, the first period is only associated with the first time period, and at least one of the SSB, the SIBn and the DCI is transmitted in the first time period.

[0098] For example, the SIBn includes at least SIB1 and / or SIB19.

[0099] For example, the DCI is used to transmit scheduling information of the SIBn.

[0100] In an embodiment of the present application, for example, the first period is only associated with the second time period, and the SSB is transmitted in the second time period. For example, the terminal device measures the SSB in the second time period.

[0101] The relationship between the first time period and the second time period will be described in detail below.

[0102] In an embodiment of the present application, the time domain position of the first time period and the time domain position of the second time period are related, or the time domain position of the first time period and the time domain position of the second time period are independent of each other, that is, not related.

[0103] In an embodiment of the present application, the time domain position of the first time period and the time domain position of the second time period are related, including:

[0104] After a specific time of each first time period, one or a group of second time periods are configured, and the occurrence period of the one or the group of second time periods is the same as the period of the first time period.

[0105] In addition, the group of second time periods includes at least two second time periods.

[0106] FIG. 9 is a timing relationship diagram of the first time period and the second time period according to an embodiment of the present application. As shown in (a) of FIG. 9, one second time period is configured after a specific time of each first time period (downlink transmission interval); as shown in (b) of FIG. 9, a group of second time periods are configured after a specific time of each first time period.

[0107] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period can be related, including: one or a group of second time periods are configured after a specific time of at least two first time periods, and the period of the one or the group of second time periods is an integer multiple of the period of the first time period.

[0108] FIG. 10 is another timing relationship diagram of the first time period and the second time period according to an embodiment of the present application. As shown in FIG. 10, one second time period is configured after a specific time of two first time periods (downlink transmission interval), and the period T5 of the second time period is twice the period T4 of the first time period.

[0109] For example, the specific time includes at least one of the following:

[0110] The length of the specific time is zero, that is, the first time period and the second time period are adjacent;

[0111] Fixed time, the fixed time is a fixed time length by default of the terminal device;

[0112] Time related to a time delay, the time delay is an uplink and / or downlink transmission time delay and / or signaling interaction time delay between the terminal device and the network;

[0113] Time indicated by the network device, for example, the time indicated by the network device includes at least one of the following: a time length configured by the network device; a time length indicated by scheduling information sent by the network device to the terminal device.

[0114] The above describes the case that the first time period and the second time period are associated, and the case that the first time period and the second time period are independent is described below.

[0115] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are independent, including at least one of the following:

[0116] The first time period and the second time period are respectively configured by the network device;

[0117] The first time period has a periodic characteristic;

[0118] The second time period has a periodicity characteristic; for example, including that the periodicity of the second time period and the first time period can be the same or related, can be different or unrelated, can also include that the periodicity of the second time period is an integer multiple of the periodicity of the first time period, or vice versa, that is, the periodicity of the first time period is an integer multiple of the periodicity of the second time period;

[0119] The second time period does not have a periodicity characteristic; for example, including that the time domain position of the second time period is determined by network device scheduling and / or configuration.

[0120] In the embodiments of the present application, for different cells or beams of cells, the attributes of the first time period and / or the second time period are the same or different, and / or, the network device can determine the configuration of the SSB and / or the attributes of the first time period and / or the second time period according to the user density and / or service density in the cell or the beam of the cell,

[0121] The different cells or beams of cells are associated with different satellite beams of the same satellite, and the association includes that the coverage of the cell or the beam of the cell is formed by the satellite beam.

[0122] For example, for all beams in the satellite footprint, the power sharing pattern of the satellite can be the same or different, including that for different satellite cells or beams of satellite cells associated with these satellite beams, the attributes of the first time period and / or the second time period can be the same or different.

[0123] The attributes of the first time period and / or the second time period include at least one of the following:

[0124] Periodicity;

[0125] Revisit time;

[0126] Residence time or on duration time.

[0127] In the embodiments of the present application, for all beams in the satellite footprint, the same power sharing pattern of the satellite includes at least one of the following:

[0128] The same total power is allocated to each satellite beam within one period of completing power sharing across all the beams in the satellite footprint;

[0129] The activated power of all satellite beams in the satellite is the same;

[0130] The time length of activation of all satellite beams in the satellite is the same;

[0131] The activation period of all satellite beams in the satellite is the same;

[0132] The first time period and / or the second time period of different cells associated with different satellite beams and / or different beams of the cells are the same;

[0133] The period of starting SSB transmission, and / or the duration of starting SSB transmission, and / or the period of SSB in the duration of starting SSB transmission on different cells associated with different satellite beams and / or different beams of the cells are the same.

[0134] In the embodiments of the present application, for all beams within the satellite footprint, the power sharing mode of the satellite is not the same, including at least one of the following:

[0135] According to the density of terminal devices in the cell and / or the beam of the cell or the density of services related to the terminal devices, the power on the satellite beam associated with the cell and / or the beam of the cell is allocated;

[0136] The network device determines the attribute of the first time period and / or the second time period, and / or determines the first configuration information according to the density of users or services in the cell and / or the beam of the cell.

[0137] For example, the greater the density of users or services, the shorter the period and / or revisit time of the first time period and / or the second time period, and / or the longer the residence time.

[0138] For the basis for determining the density of users or services, for example, including at least one of the following:

[0139] Pre-known information, such as known population distribution information, known distribution of towns or villages, transportation or navigation routes, etc.

[0140] Event information, such as location information of an earthquake, information of a search and rescue area, etc.

[0141] Location information reported by the terminal device;

[0142] Response information of the terminal device, including service request information;

[0143] Downlink service information, such as downlink buffer information.

[0144] In the embodiments of the present application, different power sharing modes can be adopted for different satellite beams according to the planning of the network device, wherein the first configuration information of the cells associated with different beams and / or the cells and / or the attribute of the first time period and / or the second time period are different.

[0145] In the embodiments of the present application, the network device sends the first configuration information through first signaling or a first message,

[0146] For example, the first signaling or the first message is an existing signaling or an existing message.

[0147] For another example, the first signaling or the first message is a new signaling or a new message.

[0148] In the embodiments of the present application, the parameters of the first configuration information indicated in the first signaling or the first message include the related parameters of the existing SSB and / or the related parameters of the newly added SSB.

[0149] In the embodiments of the present application, the related parameters of the SSB include a parameter indicating the period of SSB transmission.

[0150] In the embodiments of the present application, the value range of the related parameters of the existing SSB remains unchanged; for example, the ssb-periodicityServingCell is used to indicate the SSB period length of the current cell, and the maximum SSB period is still 160 ms.

[0151] Alternatively, the value range of the related parameters of the existing SSB includes an extended new value range; for example, the configurable SSB period is increased to 320 ms or 640 ms or 1280 ms, etc.

[0152] In the embodiments of the present application, the related parameters of the newly added SSB include a parameter indicating the discontinuous on SSB transmission. For example, the related parameters of the newly added SSB are used to indicate the possible SSB period and / or the possible SSB on period in the NTN, which can also be called SSB Burst period or SSB Cluster period, etc., and the related parameters of the newly added SSB are, for example, ssb-periodicityServingCellNTN or ntn-ssb-periodicityServingCell, etc.

[0153] In the embodiments of the present application, according to the user density, service demand, network adjustment, etc., the power sharing scheme of the satellite to different beams may change, and accordingly, the time period, for example, the first time period and / or the second time period, during which the cells or the beams of the cells associated with these beams can send SSBs may also change, and therefore, it is necessary to allow the adjustment of the first configuration information of the cells or the beams of the cells, including using RRC reconfiguration, system message update, system message change, system message modification, etc., to indicate the first configuration information updated by the terminal device.

[0154] As shown in FIG. 5, the method can further include:

[0155] 503: The network device sends second configuration information to the terminal device;

[0156] For example, the second configuration information includes configuration information of the adjusted SSB.

[0157] For example, the second configuration information is sent through an RRC reconfiguration message and / or a system information change message. In addition, the system information change can also be referred to as system information update or system information modification.

[0158] Operation 503 is an optional operation, which is represented by a dashed box in FIG. 5.

[0159] In the embodiments of the present application, the network device can perform transmission of corresponding system information according to the transmission of the SSB; for example, the system information always appears with the SSB, for example, after sending the SSB, the SIB related to the SSB will always be transmitted, for example, the associated satellite beam is still activated, and within the range of the cell and / or cell beam associated with the satellite beam, the network can complete the transmission of the subsequent SIB of the SSB after the transmission of the SSB.

[0160] In the embodiments of the present application, the time domain resource for transmission of the system information can only appear in the time period in which downlink transmission can be performed, and the time domain resource of the transmission of the SSB and the time domain resource of the transmission of the corresponding system information appear in the same time period in which downlink transmission can be performed, that is, in the same first time period or second time period, or in different time periods in which downlink transmission can be performed, that is, in different first time periods or second time periods. For example, the system information can only appear in the first time period and / or the second time.

[0161] The above is described for the first implementation, that is, the first period is associated with the first time period and / or the second time period. In the following, the second implementation is described, that is, the first period is independent of the first time period and / or the second time period.

[0162] On the one hand, since the SSB occupies a small bandwidth, the power required for transmitting the SSB can be lower than the power required for transmitting other public messages or downlink data, and the satellite can activate the beam to implement transmission of the SSB using less power; on the other hand, a terminal device based on a specification version before Rel-19 can not be able to obtain information of the first time period and / or the second time period when accessing a communication network through an NTN.

[0163] In the embodiments of the present application, the first period, that is, the configuration of the period in which the SSB transmission is started, is independent of, that is, irrelevant to, the first time period and / or the second time period.

[0164] The content about the first time period and / or the second time period is the same as the above description, which is not repeated here.

[0165] For example, the configuration of the SSB is independent of the configuration of the first time period and / or the second time period.

[0166] For another example, the SSB occurs periodically according to a default period and / or a network device indicated SSB period, and is not limited by the first time period and / or the second time period.

[0167] FIG. 11 is a timing diagram of SSB transmission according to an embodiment of the present application. As shown in FIG. 11, for example, a cell or cell beam only activates PBCH, starts the transmission of SSB, and the SSB transmitted according to the first configuration information can be successfully transmitted.

[0168] For another example, the SSB is successfully transmitted only in the first time period and / or the second time period, and the signaling including the period of the SSB and the parameter values are not modified.

[0169] FIG. 12 is another timing diagram of SSB transmission according to an embodiment of the present application. As shown in FIG. 12, the SSB is successfully transmitted in the first time period and / or the second time period, and is not successfully transmitted at other times outside the first time period and / or the second time period.

[0170] As can be seen from the above embodiments, in the case of dynamic sharing of total transmission power of a satellite among satellite beams, by configuring, by a network device, a cell SSB for terminal device access and / or downlink transmission discontinuous measurement, the inventory or future terminal devices can timely detect SSB information, and the problem of missing satellite cell service due to failure to detect a cell within a default time is avoided.

[0171] Embodiments of the second aspect

[0172] The embodiments of the present application provide a cell access and / or cell measurement method, which is applied to a terminal device and corresponds to the SSB configuration method applied to a network device in the embodiments of the first aspect. The same or corresponding content can be referred to the description in the embodiments of the first aspect.

[0173] The method is applied to a terminal device, for example, the terminal device 102 in FIG. 4.

[0174] FIG. 13 is a schematic diagram of a cell access and / or cell measurement method according to an embodiment of the present application. As shown in FIG. 13, the method comprises:

[0175] 1301: The terminal device receives first configuration information from a network device; and

[0176] 1302: The terminal device accesses and / or measures the downlink transmission discontinuous cell according to the first configuration information.

[0177] In the embodiment of the present application, the first configuration information comprises configuration information of SSB, and the SSB is used for the terminal device to access and / or measure the downlink transmission discontinuous cell.

[0178] In the embodiment of the present application, the configuration information of SSB comprises information of a first period, and the first period is a period in which SSB transmission is enabled. In addition, the configuration information of SSB can further comprise duration information of the time period in which SSB transmission is enabled, for example, the duration length.

[0179] In addition, the configuration information of SSB can further comprise period information of SSB or transmission frequency information of SSB in the duration of the time period in which SSB transmission is enabled.

[0180] In the embodiment of the present application, the first period is associated with the time in which the cell or the beam of the cell can perform downlink transmission; the first period can also be independent of the time in which the cell or the beam of the cell can perform downlink transmission.

[0181] In the embodiment of the present application, the time domain resource in which SSB is transmitted is within the time in which the cell or the beam of the cell can perform downlink transmission.

[0182] In the embodiment of the present application, the time in which downlink transmission can be performed comprises a first time period and / or a second time period,

[0183] The first period is associated with the first time period and / or the second time period,

[0184] In the first time period, only specific downlink transmission can be performed, and the specific downlink transmission comprises downlink transmission of common messages; and / or, in the second time period, normal downlink transmission can be performed.

[0185] In the embodiment of the present application, the time domain resource in which SSB is transmitted is within the first time period and / or the second time period, comprising: the period of SSB is the same as the period in which SSB transmission is enabled (i.e. the first period), and the duration of the time period in which SSB transmission is enabled is within the first time period and / or the second time period, wherein in each duration of the time period in which SSB transmission is enabled, SSB with a first index is transmitted once, or in each duration of the time period in which SSB transmission is enabled, the period of SSB is a third period, i.e. SSB with the first index is transmitted at least twice with the third period as the period, and / or,

[0186] The first period depends on the second period, including: the first period is the same as the second period, or the first period is an integer multiple of the second period, and the second period is a period in which the first time period and / or the second time period occurs, and a duration of the on-SSB transmission in the first period is less than or equal to the first time period and / or the second time period.

[0187] In the embodiments of the present application, the first period is only associated with the first time period, and at least one of the SSB, the SIBn and the DCI is transmitted in the first time period; and / or,

[0188] The first period is only associated with the second time period, and the SSB is transmitted in the second time period.

[0189] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, or,

[0190] The time domain position of the first time period and the time domain position of the second time period are independent of each other.

[0191] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, including:

[0192] One or a group of second time periods are configured after a specific time of each first time period,

[0193] The period in which the one or the group of second time periods occur is the same as the period of the first time period, and / or,

[0194] One or a group of second time periods are configured after a specific time of at least two first time periods, and the period in which the one or the group of second time periods occur is an integer multiple of the period in which the first time period occurs.

[0195] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are independent of each other, including at least one of:

[0196] The first time period and the second time period are respectively configured by the network device;

[0197] The first time period has a periodicity characteristic;

[0198] The second time period has a periodicity characteristic;

[0199] The second time period does not have a periodicity characteristic.

[0200] In the embodiments of the present application, the attributes of the first time period and the second time period are the same or different for different cells or beams of the cell.

[0201] In the embodiments of the present application, the configuration of the SSB and / or the attribute of the first time period and / or the second time period can be determined according to the user density and / or the service density in the cell or the beam of the cell.

[0202] In the embodiments of the present application, different cells or beams of cells are associated with different satellite beams of the same satellite, wherein the association includes that the coverage of the cell or the beam of the cell is formed by the satellite beam.

[0203] In the embodiments of the present application, the attribute of the first time period and / or the second time period includes at least one of the following:

[0204] Periodicity;

[0205] Revisit time;

[0206] Residence time or on duration time.

[0207] In the embodiments of the present application, the configuration of the first period is independent of the time when the cell can perform downlink transmission,

[0208] The time when the cell can perform downlink transmission includes the first time period and / or the second time period,

[0209] In the first time period, only specific downlink transmission can be performed, and the specific downlink transmission includes downlink transmission of common messages; and / or, in the second time period, normal downlink transmission can be performed.

[0210] In the embodiments of the present application, after the SSB is completed, the subsequent system information of the SSB, such as SIB1, SIB19, etc., cannot be transmitted due to the end of the first time period and / or the second time period, the terminal device does not receive the expected system message, such as SIB1, SIB19, etc., and may consider that the cell is in a barred state (cell barred), so it will no longer attempt to detect any information of the cell in the subsequent period of time, such as not performing any related processing on the cell within 300s, etc., thereby missing the downlink transmission period of the cell and failing to obtain the service of the cell or even the NTN network. To solve this problem, after receiving the SSB, which includes successfully receiving the MIB, and not receiving the expected system information, including not receiving SIB1, SIB19, etc., the method can further include:

[0211] The terminal device continues to attempt to receive the specific system information in a third time period after successfully receiving the SSB and not receiving the specific system information, wherein the third time period includes not considering that the cell is in a barred state (cell barred) in the third time period; and / or,

[0212] When the terminal device still fails to receive the specific system information after the third time period, it determines or decides that the cell is in a cell barred state; for example, the system information includes SSB, SIBn (such as SIB1, SIB19, etc.).

[0213] In the embodiments of the present application, the third time period is related to the fourth time, and the fourth time includes at least one of the following:

[0214] a maximum possible SSB periodicity of the cell,

[0215] a minimum time required by the satellite to complete activation of all satellite beams in a footprint of the satellite, the satellite beam being a satellite beam in the footprint of the satellite, and the satellite being a satellite forming a coverage of the cell;

[0216] an occurrence period of the first time period of the cell and / or the cell beam;

[0217] an occurrence period of the second time period of the cell and / or the cell beam;

[0218] In the embodiments of the present application, in the first time period, the cell and / or the cell beam can only perform specific downlink transmission, and the specific downlink transmission includes downlink transmission of a common message; and / or, in the second time period, the cell and / or the cell beam can perform normal downlink transmission,

[0219] In the embodiments of the present application, the third time period is not less than the fourth time, and / or the third time period is not less than the fourth time plus a time offset, and the time offset is greater than a delay of specific system information transmission relative to SSB transmission.

[0220] Next, the actions of the network device side and the terminal device side will be described.

[0221] FIG. 14 is an interaction diagram of a configuration method of SSB according to an embodiment of the present application. The method includes:

[0222] 1401: A network device generates first configuration information including configuration information of SSB, wherein the SSB is used for terminal device to access and / or measure a cell with discontinuous downlink transmission;

[0223] 1402: The network device sends the first configuration information to the terminal device;

[0224] 1403: The terminal device accesses and / or measures the cell with discontinuous downlink transmission according to the first configuration information.

[0225] 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 described here.

[0226] From the above embodiments, in the case that the total transmit power of the satellite is dynamically shared among the satellite beams, by the network device configuring the SSB of the cell for the terminal device to access and / or measure the downlink transmission discontinuous cell, the inventory or future terminal device can detect the SSB information in time, avoiding the problem that the terminal device misses the satellite cell service due to the failure to detect the cell within the default time.

[0227] Embodiments of the third aspect

[0228] The embodiments of the present application provide an SSB configuration device, which is arranged in a network 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 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.

[0229] FIG. 15 is a schematic diagram of an SSB configuration device according to an embodiment of the present application. As shown in FIG. 15, the SSB configuration device 1500 includes:

[0230] a generating unit 1501 configured to generate first configuration information, the first configuration information including SSB configuration information, the SSB being used by a terminal device to access and / or measure a downlink transmission discontinuous cell; and

[0231] a sending unit 1502 configured to send the first configuration information to the terminal device.

[0232] In the embodiments of the present application, the SSB configuration information includes information of a first period, the first period being a period in which the SSB transmission is enabled. In addition, the SSB configuration information further includes: in the first period, duration information of the enabled SSB transmission, such as the duration length, and / or period information of the SSB or transmission frequency information of the SSB in the duration of the enabled SSB transmission.

[0233] In the embodiments of the present application, the first period is associated with the time during which the cell or the beam of the cell can perform downlink transmission; the first period can also be independent of the time during which the cell or the beam of the cell can perform downlink transmission.

[0234] In the embodiments of the present application, the time domain resource for transmitting the SSB is within the time during which the cell or the beam of the cell can perform downlink transmission.

[0235] In the embodiments of the present application, the time during which downlink transmission can be performed includes a first time period and / or a second time period,

[0236] the first period is associated with the first time period and / or the second time period,

[0237] In the first time period, only specific downlink transmission can be performed, and the specific downlink transmission includes downlink transmission of a common message; and / or in the second time period, normal downlink transmission can be performed.

[0238] In the embodiments of the present application, the time domain resource for transmitting the SSB is in the first time period and / or the second time period, and / or,

[0239] The first period depends on the second period, and the second period is a period in which the first time period and / or the second time period appears.

[0240] In the embodiments of the present application, the time domain resource for transmitting the SSB is in the first time period and / or the second time period, including that the period of the SSB is the same as the period of starting SSB transmission (i.e. the first period), and the duration of starting SSB transmission is in the first time period and / or the second time period, wherein in each duration of starting SSB transmission, the SSB with the first index is transmitted once, or the SSB with the first index is transmitted at least twice with a third period as a period, that is, in each duration of starting SSB transmission, the period of the SSB is the third period,

[0241] and / or,

[0242] The first period depends on the second period, including that the first period is the same as the second period, or the first period is an integer multiple of the second period, and the duration of starting SSB transmission in the first period is less than or equal to the first time period and / or the second time period.

[0243] In the embodiments of the present application, the first period is only associated with the first time period, and at least one of the SSB, the SIBn and the DCI is transmitted in the first time period;

[0244] and / or,

[0245] The first period is only associated with the second time period, and the SSB is transmitted in the second time period.

[0246] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, or,

[0247] The time domain position of the first time period and the time domain position of the second time period are independent of each other.

[0248] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, including:

[0249] After a specific time of each first time period, one or a group of second time periods are configured, the period of the one or the group of second time periods is the same as the period of the first time period, and / or,

[0250] one or a group of second time periods are configured after a specific time of the at least two first time periods, and a period of occurrence of the one or the group of second time periods is an integer multiple of a period of occurrence of the first time period;

[0251] In the embodiments of the present application, the specific time includes at least one of the following:

[0252] The length of the specific time is zero;

[0253] A fixed time, the fixed time being a fixed time length by default of the terminal device;

[0254] A time related to a time delay, the time delay being an uplink and / or downlink transmission time delay and / or a signaling interaction time delay between the terminal device and the network;

[0255] A time indicated by the network device,

[0256] In the embodiments of the present application, the time indicated by the network device includes at least one of the following: a time length configured by the network device; and a time length indicated by scheduling information sent by the network device to the terminal device.

[0257] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are independent of each other, and include at least one of the following:

[0258] The first time period and the second time period are respectively configured by the network device;

[0259] The first time period has a periodicity;

[0260] The second time period has a periodicity;

[0261] The second time period does not have a periodicity.

[0262] In the embodiments of the present application, for different cells or beams of a cell, the properties of the first time period and / or the second time period are the same or different, and / or the configuration of the SSB and / or the properties of the first time period and / or the second time period can be determined according to a user density and / or a service density in the cell or the beam of the cell.

[0263] The different cells or beams of a cell are associated with different satellite beams of a same satellite, and the association includes that a coverage of the cell or the beam of the cell is formed by the satellite beam,

[0264] In the embodiments of the present application, the properties of the first time period and / or the second time period include at least one of the following:

[0265] A periodicity;

[0266] A revisit time;

[0267] dwelling interval or on duration time.

[0268] In the embodiment of the present application, the sending unit 1502 sends the first configuration information through the first signaling or the first message,

[0269] The first signaling or the first message is an existing signaling or an existing message; and / or,

[0270] The first signaling or the first message is a new signaling or a new message; and / or,

[0271] The parameters of the first configuration information indicated in the first signaling or the first message include the related parameters of the existing SSB and / or the related parameters of the newly added SSB;

[0272] The related parameters of the SSB include parameters indicating the period of SSB transmission,

[0273] The value range of the related parameters of the existing SSB remains unchanged or includes an extended new value range; and / or, the related parameters of the newly added SSB include related parameters indicating discontinuous on SSB transmission.

[0274] In the embodiment of the present application, the sending unit 1502 also sends the second configuration information to the terminal device, and the second configuration information includes the configuration information of the adjusted SSB,

[0275] The second configuration information is sent through an RRC reconfiguration message and / or a system information change message.

[0276] In the embodiment of the present application, the network device performs transmission of corresponding system information according to the transmission of the SSB; and / or,

[0277] The time domain resource for the transmission of the system information only appears in a time period capable of downlink transmission, including the time domain resource of the transmission of the SSB and the time domain resource of the transmission of the corresponding system information, in the same time period capable of downlink transmission, or in different time periods capable of downlink transmission.

[0278] In the embodiment of the present application, the first period and the time capable of downlink transmission of the cell or the beam of the cell are independent of each other.

[0279] In the embodiment of the present application, the time capable of downlink transmission includes a first time period and / or a second time period,

[0280] The configuration of the first period is independent of the first time period and / or the second time period,

[0281] In a first time period, only specific downlink transmission is enabled, the specific downlink transmission including downlink transmission of a common message; and / or in a second time period, normal downlink transmission is enabled.

[0282] As can be seen from the above embodiments, in the case that the total transmission power of the satellite is dynamically shared among satellite beams, by means of the network device configuring the SSB of the downlink transmission discontinuous cell for terminal device access and / or measurement, the inventory or future terminal device can timely detect the SSB information, avoiding the problem that the terminal device misses the satellite cell service due to the failure to detect the cell within the default time.

[0283] Embodiments of the fourth aspect

[0284] The embodiments of the present application provide a cell access and / or cell measurement apparatus, which is applied to a terminal device. Since the principle of solving the problem of the apparatus 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.

[0285] FIG. 16 is a schematic diagram of a cell access and / or cell measurement apparatus according to an embodiment of the present application. As shown in FIG. 16, the cell access and / or cell measurement apparatus 1600 includes:

[0286] a receiving unit 1601 configured to receive first configuration information from a network device, the first configuration information including configuration information of an SSB, the SSB being used for terminal device access and / or measurement of a downlink transmission discontinuous cell; and

[0287] a processing unit 1602 configured to access and / or measure the downlink transmission discontinuous cell according to the first configuration information.

[0288] In the embodiments of the present application, the configuration information of the SSB includes information of a first period, the first period being a period in which the SSB transmission is enabled. In addition, the configuration information of the SSB further includes duration information of the SSB transmission enabled in the first period, such as the duration length, and / or period information of the SSB or transmission frequency information of the SSB in the duration of the SSB transmission enabled.

[0289] In the embodiments of the present application, the first period is associated with the time during which the cell or the beam of the cell can perform downlink transmission; the first period can also be independent of the time during which the cell or the beam of the cell can perform downlink transmission.

[0290] In the embodiments of the present application, the time domain resource for transmitting the SSB is within the time during which the cell or the beam of the cell can perform downlink transmission.

[0291] In the embodiments of the present application, the time capable of downlink transmission includes the first time period and / or the second time period,

[0292] The first period is associated with the first time period and / or the second time period,

[0293] In the first time period, only specific downlink transmission can be performed, and the specific downlink transmission includes downlink transmission of a common message; and / or, in the second time period, normal downlink transmission can be performed.

[0294] In the embodiments of the present application, the time domain resource for transmitting the SSB is in the first time period and / or the second time period, including: the period of the SSB is the same as the period of starting SSB transmission (i.e., the first period), and the duration of starting SSB transmission is in the first time period and / or the second time period, wherein in each duration of starting SSB transmission, the SSB with the first index is transmitted once, or in each duration of starting SSB transmission, the period of the SSB is the third period, i.e., the SSB with the first index is transmitted at least twice with the third period as the period, and / or,

[0295] The first period depends on the second period, including: the first period is the same as the second period, or the first period is an integer multiple of the second period, the second period is the period of the first time period and / or the second time period, and the duration of starting SSB transmission in the first period is less than or equal to the first time period and / or the second time period.

[0296] In the embodiments of the present application, the first period is only associated with the first time period, and at least one of the SSB, the SIBn and the DCI is transmitted in the first time period; and / or,

[0297] The first period is only associated with the second time period, and the SSB is transmitted in the second time period.

[0298] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, or,

[0299] The time domain position of the first time period and the time domain position of the second time period are independent of each other.

[0300] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are related, including:

[0301] After a specific time of each first time period, one or a group of second time periods are configured,

[0302] The period of the one or the group of second time periods is the same as the period of the first time period, and / or,

[0303] After a specific time of the at least two first time periods, one or a group of second time periods are configured, and a period of occurrence of the one or the group of second time periods is an integer multiple of a period of occurrence of the first time period.

[0304] In the embodiments of the present application, the time domain position of the first time period and the time domain position of the second time period are independent of each other, and include at least one of the following:

[0305] The first time period and the second time period are respectively configured by a network device.

[0306] The first time period has a periodicity.

[0307] The second time period has a periodicity.

[0308] The second time period does not have a periodicity.

[0309] In the embodiments of the present application, for different cells or beams of a cell, the attributes of the first time period and the second time period are the same or different.

[0310] In the embodiments of the present application, the configuration of the SSB and / or the attributes of the first time period and / or the second time period can be determined according to the user density and / or the service density in the cell or the beams of the cell.

[0311] In the embodiments of the present application, different cells or beams of a cell are associated with different satellite beams of a same satellite, wherein the association includes that the coverage of the cell or the beams of the cell is formed by the satellite beams.

[0312] In the embodiments of the present application, the attributes of the first time period and / or the second time period include at least one of the following:

[0313] Periodicity;

[0314] Revisit time;

[0315] Residence time or on duration time.

[0316] In the embodiments of the present application, the configuration of the first periodicity is independent of the time during which the cell can perform downlink transmission,

[0317] The time during which the cell can perform downlink transmission includes the first time period and / or the second time period,

[0318] During the first time period, only specific downlink transmission can be performed, and the specific downlink transmission includes downlink transmission of a common message; and / or, during the second time period, normal downlink transmission can be performed.

[0319] In the embodiments of the present application, the receiving unit 1601 also continues to attempt to receive the specific system information after successfully receiving the SSB and within a third time period during which the specific system information is not received, wherein the third time period includes that it is not determined that the cell is in a cell barred state within the third time period; and / or,

[0320] The processing unit 1602 also determines or decides that the cell is in a cell barred state when the specific system information still cannot be received after the third time period.

[0321] In the embodiments of the present application, the third time period is related to a fourth time, and the fourth time includes at least one of the following:

[0322] A maximum SSB period of the cell,

[0323] A minimum time that the satellite can complete for all satellite beams activated, the satellite beam is a satellite beam within a footprint of the satellite, and the satellite is a satellite forming a cell coverage;

[0324] An occurrence period of the first time period of the cell and / or cell beam;

[0325] An occurrence period of the second time period of the cell and / or cell beam;

[0326] The cell and / or cell beam can only perform specific downlink transmission in the first time period, and the specific downlink transmission includes downlink transmission of a common message; and / or, the cell and / or cell beam can perform normal downlink transmission in the second time period,

[0327] The third time period is not less than the fourth time, and / or the third time period is not less than the fourth time plus a time offset, and the time offset is greater than a delay of specific system information transmission relative to SSB transmission.

[0328] 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, by configuring the SSB for terminal device access and / or measuring downlink transmission discontinuous cell by the network device, the inventory or future terminal device can timely detect the SSB information, and the problem of missing satellite cell service due to not detecting the cell within the default time is avoided.

[0329] Embodiments of the sixth aspect

[0330] The embodiments of the present application provide a network device, which includes the SSB configuration apparatus according to the embodiments of the third aspect.

[0331] Fig. 17 is a schematic block diagram of a system configuration of a network device according to an embodiment of the present application. As shown in Fig. 17, the network device 1700 can include a processor 1710 and a memory 1720, wherein the memory 1720 is coupled to the processor 1710. The memory 1720 can store various data, and further store a program 1730 for information processing, and execute the program 1730 under the control of the processor 1710 to receive various information sent by a terminal device and send various information to the terminal device.

[0332] In an embodiment, the function of the SSB configuration apparatus can be integrated into the processor 1710.

[0333] The processor 1710 can be configured to: generate, by the network device, first configuration information, wherein the first configuration information includes configuration information of an SSB, and the SSB is used for a terminal device to access and / or measure a downlink transmission discontinuous cell; and send, by the network device, the first configuration information to the terminal device.

[0334] In another embodiment, the SSB configuration apparatus can be configured separately from the processor 1710, for example, the SSB configuration apparatus can be configured as a chip connected to the processor 1710, and the function of the SSB configuration apparatus is realized through the control of the processor 1710.

[0335] In addition, as shown in Fig. 17, the network device 1700 can further include a transceiver 1740, an antenna 1750, etc., wherein the functions of the above components are similar to those of the prior art, and will not be described here. It is worth noting that the network device 1700 does not necessarily include all the components shown in Fig. 17, and the network device 1700 can further include components not shown in Fig. 17, which can be referred to the prior art.

[0336] 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, by configuring, by the network device, the SSB used for the terminal device to access and / or measure the downlink transmission discontinuous cell, the inventory or future terminal device can timely detect the SSB information, and the problem of missing satellite cell service due to the failure to detect the cell within the default time is avoided.

[0337] Embodiments of the fifth aspect

[0338] The embodiments of the present application provide a terminal device, which includes the cell access and / or cell measurement apparatus according to the embodiments of the fourth aspect.

[0339] FIG. 18 is a schematic block diagram of a system configuration of a terminal device according to an embodiment of the present application. As shown in FIG. 18, the terminal device 1800 can include a processor 1810 and a memory 1820; the memory 1820 is coupled to the processor 1810. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to achieve telecommunication functions or other functions.

[0340] In one embodiment, the functions of the cell access and / or cell measurement apparatus can be integrated into the processor 1810.

[0341] The processor 1810 is configured to: receive, by the terminal device, first configuration information from a network device, the first configuration information comprising configuration information of an SSB, the SSB being used for the terminal device to access and / or measure a downlink transmission discontinuous cell; and access and / or measure, by the terminal device, the downlink transmission discontinuous cell according to the first configuration information.

[0342] In another embodiment, the cell access and / or cell measurement apparatus can be configured separately from the processor 1810, for example, the cell access and / or cell measurement apparatus can be configured as a chip connected to the processor 1810 to realize the functions of the cell access and / or cell measurement apparatus through the control of the processor 1810.

[0343] As shown in FIG. 18, the terminal device 1800 can also include a communication module 1830, an input unit 1840, a display 1850, and a power supply 1860. It is worth noting that the terminal device 1800 does not necessarily include all the components shown in FIG. 18; in addition, the terminal device 1800 can also include components not shown in FIG. 18, which can be referred to related technologies.

[0344] As shown in FIG. 18, the processor 1810, also sometimes referred to as a controller or operation control, can include a microprocessor or other processor device and / or logic device, which receives input and controls the operation of various components of the terminal device 1800.

[0345] The memory 1820, 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 1810 can execute the programs stored in the memory 1820 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 1800 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present application.

[0346] From the above embodiments, in the case that the total transmit power of the satellite is dynamically shared among the satellite beams, by the network device configuring the SSB of the cell for the terminal device to access and / or measure the downlink transmission discontinuously, the inventory or future terminal device can detect the SSB information in time, and the problem of missing the satellite cell service due to the failure to detect the cell within the default time is avoided.

[0347] Embodiments of the seventh aspect

[0348] Embodiments of the present application provide a communication system, which includes the network device according to the embodiments of the fifth aspect and / or the terminal device according to the embodiments of the sixth aspect. Specific contents can be referred to the description in the embodiments of the fifth aspect and the embodiments of the sixth aspect.

[0349] For example, the structure of the communication system can refer to FIG. 4. As shown in FIG. 4, the communication system 100 includes a network device 101 and a terminal device 102. The network device 101 can be the same as the network device described in the embodiments of the fifth aspect, and / or the terminal device 102 can be the same as the terminal device described in the embodiments of the sixth aspect. The repeated contents will not be described herein.

[0350] The apparatus and method described above can be implemented by hardware, or by hardware in combination with software. The present application relates to a computer readable program, which, when executed by a logic component, can enable the logic component to implement the apparatus or constituent components described above, or 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.

[0351] 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 block diagrams shown in FIG. 15 and / or a combination of one or more functional block diagrams 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. 5, respectively. These hardware modules can be implemented by, for example, fixing the software modules by using a field programmable gate array (FPGA).

[0352] The software modules can reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, registers, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium known in the art. One storage medium can be coupled to the processor, such that the processor can read information from, and write information to, the storage medium; or the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The software modules can be stored in a 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 the mobile terminal, uses a MEGA-SIM card or a flash memory device of large capacity, the software modules can be stored in the MEGA-SIM card or the flash memory device of large capacity.

[0353] One or more of the functional blocks described in connection with Figure 15 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, discrete hardware components, or any appropriate combination of the foregoing, for performing the functions described herein. One or more of the functional blocks described in connection with Figure 15 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.

[0354] The application has been described in connection with certain embodiments, but those skilled in the art will understand that the description is merely exemplary and is not intended to limit the scope of the application. Various modifications and variations to the described embodiments will be apparent to those skilled in the art from this disclosure and such modifications and variations are intended to be within the scope of the application.

[0355] According to the various embodiments disclosed in the embodiments of the application, the following notes are also disclosed:

[0356] 1. A method for cell access and / or cell measurement, the method being applied to a terminal device, the method comprising:

[0357] receiving, by the terminal device, first configuration information from a network device, the first configuration information comprising configuration information of a SSB, the SSB being used for the terminal device to access and / or measure a downlink transmission discontinuous cell; and

[0358] accessing and / or measuring, by the terminal device, the downlink transmission discontinuous cell according to the first configuration information,

[0359] The configuration information of the SSB includes: information of a first period, and / or, duration information of an on-SSB transmission in the first period, and / or, period information of the SSB or transmission frequency information of the SSB in the duration of the on-SSB transmission,

[0360] The first period is an on-SSB transmission period.

[0361] 2. The method of the supplementary note 1, wherein,

[0362] The first period is associated with a time when the cell or a beam of the cell is capable of downlink transmission.

[0363] 3. The method of the supplementary note 2, wherein,

[0364] The time-domain resource for transmitting the SSB is in the time when the cell or the beam of the cell is capable of downlink transmission.

[0365] 4. The method of the supplementary note 2, wherein,

[0366] The time capable of downlink transmission includes a first time period and / or a second time period,

[0367] The first period is associated with the first time period and / or the second time period,

[0368] In the first time period, only specific downlink transmission is allowed, and the specific downlink transmission includes downlink transmission of a common message; and / or, in the second time period, normal downlink transmission is allowed.

[0369] 5. The method of the supplementary note 4, wherein,

[0370] The time-domain resource for transmitting the SSB is in the first time period and / or the second time period, including: the duration of the on-SSB transmission is in the first time period and / or the second time period, wherein in each of the duration of the on-SSB transmission, an SSB with a first index is transmitted once, or at least two SSBs with the first index are transmitted with a third period as a period, and / or,

[0371] The first period depends on a second period, including: the first period is the same as the second period, or the first period is an integer multiple of the second period, the second period is a period in which the first time period and / or the second time period appears, and the duration of the on-SSB transmission in the first period is less than or equal to the first time period and / or the second time period.

[0372] 6. The method of the supplementary note 4, wherein,

[0373] the first period is only associated with the first time period, and at least one of SSB, SIBn and DCI is transmitted in the first time period;

[0374] and / or,

[0375] the first period is only associated with the second time period, and SSB is transmitted in the second time period.

[0376] 7. The method of any one of appendices 4-6, wherein,

[0377] the time domain position of the first time period and the time domain position of the second time period are related, or

[0378] the time domain position of the first time period and the time domain position of the second time period are independent of each other.

[0379] 8. The method of appendix 7, wherein the time domain position of the first time period and the time domain position of the second time period are related, comprising:

[0380] one or a group of the second time periods are configured after a specific time of each of the first time periods,

[0381] the occurrence period of the one or the group of the second time periods is the same as the period of the first time period, and / or,

[0382] one or a group of the second time periods are configured after a specific time of at least two of the first time periods, and the occurrence period of the one or the group of the second time periods is an integer multiple of the occurrence period of the first time period.

[0383] 9. The method of appendix 7, wherein the time domain position of the first time period and the time domain position of the second time period are independent of each other, comprising at least one of:

[0384] the first time period and the second time period are respectively configured by the network device;

[0385] the first time period has a periodicity characteristic;

[0386] the second time period has a periodicity characteristic;

[0387] the second time period does not have a periodicity characteristic,

[0388] The properties of the first time period and the second time period are same or different for different cells or beams of the cells, and / or the configuration of SSB and / or the properties of the first time period and / or the second time period are determined according to the user density and / or the service density in the cell or the beam of the cell.

[0389] The different cells or beams of the cells are associated with different satellite beams of the same satellite, wherein the association comprises that the coverage of the cell or the beam of the cell is formed by the satellite beam,

[0390] The properties of the first time period and / or the second time period comprise at least one of:

[0391] Periodicity;

[0392] Revisit time;

[0393] Residence time or on duration time.

[0394] 10. The method according to the appended note 1, wherein,

[0395] The configuration of the first period is independent of the time when the cell can perform downlink transmission,

[0396] The time when the cell can perform downlink transmission comprises the first time period and / or the second time period,

[0397] Only specific downlink transmission can be performed in the first time period, and the specific downlink transmission comprises downlink transmission of common message; and / or normal downlink transmission can be performed in the second time period.

Claims

1. An apparatus for configuring SSBs, the apparatus being applied to a network device, the apparatus comprising: a generating unit configured to generate first configuration information, the first configuration information comprising configuration information of SSBs, the SSBs being used for a terminal device to access and / or measure a downlink discontinuous cell; and a sending unit configured to send the first configuration information to the terminal device.

2. The apparatus according to claim 1, wherein the configuration information of the SSBs comprises information of a first period, and / or, duration information of an on-duration of SSB transmission within the first period, and / or, periodicity information of the SSBs or transmission frequency information of the SSBs within the duration of the on-duration of SSB transmission, the first period is an on-duration period of SSB transmission.

3. The apparatus according to claim 2, wherein the first period is associated with a time when the cell or a beam of the cell is capable of downlink transmission.

4. The apparatus according to claim 3, wherein time domain resources for transmitting the SSBs are within the time when the cell or the beam of the cell is capable of downlink transmission.

5. The apparatus according to claim 3, wherein the time when the cell or the beam of the cell is capable of downlink transmission comprises a first time period and / or a second time period, the first period is associated with the first time period and / or the second time period, in the first time period, only specific downlink transmission is allowed, the specific downlink transmission comprising downlink transmission of common messages; and / or, in the second time period, normal downlink transmission is allowed.

6. The apparatus according to claim 5, wherein the time domain resources for transmitting the SSBs are within the first time period and / or the second time period, and / or the first period depends on a second period, the second period being a period in which the first time period and / or the second time period occurs.

7. The apparatus according to claim 6, wherein the time domain resources for transmitting the SSBs within the first time period and / or the second time period comprise that the duration of the on-duration of SSB transmission is within the first time period and / or the second time period, wherein in each of the duration of the on-duration of SSB transmission, an SSB indexed as a first index is transmitted once or at least two SSBs indexed as the first index are transmitted with a third period, and / or the first period depending on the second period comprises that the first period is the same as the second period, or the first period is an integer multiple of the second period, the duration of the on-duration of SSB transmission within the first period is less than or equal to the first time period and / or the second time period.

8. The apparatus according to claim 5, wherein the first period is only associated with the first time period, and at least one of SSB, SIBn and DCI is transmitted in the first time period; and / or the first period is only associated with the second time period, and SSB is transmitted in the second time period.

9. The apparatus according to claim 5, wherein The time domain position of the first time period and the time domain position of the second time period are related, or The time domain position of the first time period and the time domain position of the second time period are independent of each other.

10. The apparatus of claim 9, wherein The time domain position of the first time period and the time domain position of the second time period are related, including: One or a group of the second time periods are configured after a specific time of each of the first time periods, the occurrence period of the one or the group of the second time periods is the same as the period of the first time period, and / or, One or a group of the second time periods are configured after the specific time of at least two of the first time periods, the occurrence period of the one or the group of the second time periods is an integer multiple of the occurrence period of the first time period; The specific time includes at least one of: The length of the specific time is zero; A fixed time, which is a fixed time length by default of the terminal device; A time related to a time delay, which is an uplink and / or downlink transmission time delay and / or signaling interaction time delay between the terminal device and the network; A time indicated by the network device, The time indicated by the network device includes at least one of: a time length configured by the network device; and a time length indicated by scheduling information sent by the network device to the terminal device.

11. The apparatus of claim 9, wherein, The time domain position of the first time period and the time domain position of the second time period are independent of each other, including at least one of: The first time period and the second time period are respectively configured by the network device; The first time period has a periodicity characteristic; The second time period has a periodicity characteristic; The second time period does not have a periodicity characteristic.

12. The apparatus of claim 5, wherein For different cells or beams of the cell, the properties of the first time period and / or the second time period are the same or different, and / or, according to the user density and / or service density in the cell or the beam of the cell, the configuration of the SSB and / or the properties of the first time period and / or the second time period are determined, The different cells or beams of the cell are associated with different satellite beams of the same satellite, and the association includes that the coverage of the cell or the beam of the cell is formed by the satellite beams, The properties of the first time period and / or the second time period include at least one of: Periodicity; Revisit time; Residence time or on duration time.

13. The apparatus of claim 1, wherein, The sending unit sends the first configuration information through first signaling or a first message, The first signaling or the first message is an existing signaling or an existing message; and / or, The first signaling or the first message is a new signaling or a new message; and / or, The parameters of the first configuration information indicated in the first signaling or the first message include related parameters of an existing SSB and / or related parameters of a newly added SSB; The related parameters of the SSB include parameters indicating the periodicity of SSB transmission, The value range of the related parameters of the existing SSB remains unchanged or includes an extended new value range; and / or, the related parameters of the newly added SSB include related parameters indicating discontinuous on SSB transmission.

14. The apparatus of claim 1, wherein, the sending unit further sends second configuration information to the terminal device, the second configuration information including configuration information of the adjusted SSB, the second configuration information is sent through an RRC reconfiguration message and / or a system information change message.

15. The apparatus of claim 1, wherein, the network device transmits corresponding system information according to the transmission of the SSB; and / or, the time domain resource for the transmission of the system information only occurs in a time period capable of downlink transmission, including the time domain resource of the transmission of the SSB and the time domain resource of the transmission of the corresponding system information, in the same time period capable of downlink transmission, or in different time periods capable of downlink transmission.

16. The apparatus of claim 2, wherein, the first period and the time capable of downlink transmission of the cell or the beam of the cell are independent of each other.

17. The apparatus of claim 16, wherein, the time capable of downlink transmission includes a first time period and / or a second time period, the configuration of the first period is independent of the first time period and / or the second time period, in the first time period, only specific downlink transmission is allowed, the specific downlink transmission including downlink transmission of common messages; and / or, in the second time period, normal downlink transmission is allowed.

18. An apparatus for cell access and / or cell measurement, applied to a terminal device, the apparatus comprising: a receiving unit, which receives first configuration information from a network device, the first configuration information including configuration information of SSB, the SSB being used for the terminal device to access and / or measure a downlink transmission discontinuous cell; and a processing unit, which accesses and / or measures the downlink transmission discontinuous cell according to the first configuration information.

19. The apparatus of claim 18, wherein, the receiving unit further continues to attempt to receive specific system information in a third time period in which the SSB is received and the specific system information is not received, wherein it is not decided that the cell is in a cell barred state in the third time period; and / or, the processing unit further decides or determines that the cell is in a cell barred state when the specific system information cannot be received after the third time period.

20. The apparatus of claim 19, wherein, the third time period is related to a fourth time, the fourth time including at least one of: a maximum SSB period of the cell, a minimum time for a satellite to complete activation of all satellite beams within a footprint of the satellite, the satellite being a satellite forming coverage of the cell; an occurrence period of the first time period of the cell and / or the beam of the cell. an occurrence period of a second time period of the cell and / or the cell beam; during the first time period, the cell and / or the cell beam is only capable of a specific downlink transmission, the specific downlink transmission comprising a downlink transmission of a common message; and / or, during the second time period, the cell and / or the cell beam is capable of normal downlink transmission, the third time period is not less than the fourth time, and / or, the third time period is not less than the fourth time plus a time offset, the time offset being greater than a delay of the specific system information transmission relative to the SSB transmission.

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