Methods, devices, media, and program products for extending the Synchronization Signal Block (SSB).

Abstract

The present invention discloses methods, devices, media, and program products for extending the number of synchronous signal blocks (SSBs) and covering more beam positions. The method includes, if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, transmitting SSB beams to the current cell in K SSB sets, wherein the total number of SSB beams in the K SSB sets (where K is a natural number greater than 1) is greater than the number of beam positions; and transmitting the K SSB sets to the current cell, wherein beams of the same index in different SSB sets point to different beam positions.

Description

[Technical Field]

[0001] <Cross-reference of related applications> This application claims priority to a Chinese patent application filed with the China National Intellectual Property Office on April 12, 2024, application number 202410447914.6, with the title of the invention "Method, device, medium and program product for extending a synchronous signal block SSB," the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of communications technology, and more particularly to methods, devices, media, and program products for extending synchronous signal blocks (SSBs). [Background technology]

[0003] The Synchronization Signal Block (SSB) is a broadcast beam proposed for the New Radio (NR) system of fifth-generation mobile communication technology (5G), and consists of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH).

[0004] In 5G systems, on the one hand, beamforming allows the use of narrow beams instead of conventional wide beams, enabling precise targeting of horizontal and vertical radiated energy to the target user and enhancing the coverage performance of the common channel / control channel. On the other hand, beam scanning techniques allow for scanning and transmitting different SSB beams at regular intervals, covering the entire cell and improving area coverage.

[0005] In the 3rd Generation Partnership Project (3GPP) Non-Terrestrial Network (NTN), in transparent transmission mode, only local beam position coverage needs to be considered, and existing SSB beam design solutions for 5G NR can be used as is. In the time domain, the number of slots available for transmitting synchronous signal blocks within a single system half-frame is limited, and the maximum number of SSB transmissions within a half-frame or a single SSB cycle is 4, 8, or 64, depending on the subcarrier spacing and frequency settings.

[0006] On the other hand, the main development direction for low Earth orbit satellite communication systems today is to provide global broadband access services to ground or low-altitude users. However, low Earth orbit satellites are small, have limited platform resources (e.g., limited power, limited number of simultaneous beams), and the distribution of ground services is uneven, presenting many challenges in designing satellite-ground access solutions that require full area coverage. In existing technological forms, the maximum number of SSBs in an SSB set is 4 / 8 / 64, making it difficult to meet the thousands of beam positions required for full area coverage. [Overview of the project] [Problems that the invention aims to solve]

[0007] This application provides methods, devices, media, and program products for expanding the number of SSBs and covering more beam positions for synchronous signal block SSBs. [Means for solving the problem]

[0008] In the first aspect, an embodiment of the present application is an extension method for a synchronous signal block SSB applied to a satellite-borne base station, If the number of beam positions to be served by the satellite-mounted base station is greater than the number of SSB beams transmitted within each SSB period, transmitting SSB beams to the current cell in K (K is a natural number greater than 1) SSB sets, wherein the sum of the SSB beams included in the K SSB sets is greater than the number of the beam positions; Transmitting the K SSB sets to the current cell, wherein beams with the same index in different SSB sets point to different beam positions, and providing an extended method for a synchronization signal block SSB including these steps.

[0009] As an exemplary embodiment, the number of SSB beams included in each of the K SSB sets is the same.

[0010] As an exemplary embodiment, the method further includes transmitting K to the terminal device as a scan period extension coefficient.

[0011] As an exemplary embodiment, the step of transmitting K to the terminal device as a scan period extension coefficient includes transmitting K to the terminal device as a scan period extension coefficient via a system message SIB1 or a radio resource control RRC reconfiguration message.

[0012] As an exemplary embodiment, the method further includes setting the SSB scan period to 20 milliseconds or more when the multiplexing pattern between the SSB and the control resource set CORESET0 is set as multiplexing pattern 1.

[0013] As an exemplary embodiment, the method further includes transmitting the set SSB scan period to the terminal device via a SIB1 message or an RRC reconfiguration message.

[0014] As an exemplary embodiment, the method The paging setting parameters further include a step in which K paging frames constitute one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunity MOs set for each paging opportunity is the same as the number of SSB beams included in one SSB set, and the monitoring opportunity MOs and SSB beams correspond one-to-one.

[0015] As an exemplary embodiment, the method is: In the paging setting parameters, N for each wake-up period. update Set up paging frames, each paging frame corresponds to one paging opportunity, each paging opportunity PO contains K search spaces, the number of monitoring opportunities MO set up in each search space is the same as the number of SSB beams in one SSB set, and the x*S+Mth paging physical downlink control channel PDCCH MO located in the kth search space in PO further includes a step corresponding to the Mth transmitted SSB, Here, N update= N / K is the number of paging frames in a pre-set wake-up period, k is the position of the SSB beam corresponding to the terminal device in K SSB sets, X is the number of MOs mapped to one SSB, the range of x is a natural number between [0, X-1], S is the number of SSB beams in one SSB set, and the range of M is a natural number between [1, S].

[0016] As an exemplary embodiment, the method is: The further step includes transmitting the paging setting parameters to a terminal device via an SIB1 message or an RRC reconfiguration message.

[0017] In a second aspect, the embodiment of the present application is an extension method for a synchronous signal block SSB applied to terminal equipment, The steps include: establishing a connection with a satellite-borne base station, and then receiving the scan period expansion coefficient K transmitted by the satellite-borne base station; The steps include determining a new SSB scan period based on the current SSB scan period and the scan period expansion coefficient K, The steps include scanning and searching for an SSB beam with the new SSB scan cycle, This provides a method for extending the synchronization signal block SSB, including the SSB.

[0018] As an exemplary embodiment, the step of receiving the scan period expansion coefficient K transmitted by the satellite-borne base station is: The step includes receiving the scan period expansion coefficient K transmitted by the satellite-borne base station via an SIB1 message or an RRC reconstruction message.

[0019] As an exemplary embodiment, the method is: Before establishing a connection with the satellite-borne base station, the steps include determining the target SSB scan period based on a preset target scan period expansion coefficient and an initial SSB scan period, The method further includes the step of determining the initial SSB by scanning and searching the SSB beam at the target SSB scan period.

[0020] In one exemplary embodiment, the target scan period expansion coefficient is the maximum value among at least one preset scan period expansion coefficient.

[0021] In one exemplary embodiment, the current SSB scan period is determined in accordance with an SIB1 message or RRC reconfiguration message transmitted by the satellite-borne base station.

[0022] As an exemplary embodiment, the method is: The step further includes receiving paging configuration parameters transmitted by the satellite-borne base station via an SIB1 message or an RRC reconfiguration message.

[0023] As an exemplary embodiment, the method is: The steps further include determining the starting wireless frame SFN of the paging frame group in which the terminal device is located using Equation 1 based on the paging setting parameters, the paging frame of the terminal device corresponds to the kth paging frame of the paging frame group, the position of the kth paging frame is determined using Equation 2, and the monitoring opportunity MO of the terminal device is the physical downlink control channel PDCCH MO corresponding to the lth SSB of the paging opportunity corresponding to the kth paging frame,

[0024]

number

[0025]

number

[0026] As an exemplary embodiment, the method is: The steps further include determining the starting wireless frame SFN of the paging frame in which the terminal device is located using Equation 3 based on the paging setting parameters, and the monitoring opportunity MO of the terminal device being the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space,

[0027]

number

[0028] In a third aspect, the embodiments of the present application are: A configuration unit configured to transmit SSB beams to the current cell in K SSB sets (where K is a natural number greater than 1) if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, wherein the total number of SSB beams included in the K SSB sets is greater than the number of beam positions, A transmitting unit configured to transmit the K SSB sets to the current cell, wherein beams of the same index in different SSB sets point to different beam positions. Further extensions for the synchronous signal block SSB are provided, including the synchronous signal block.

[0029] In one exemplary embodiment, the number of SSB beams included in each of the K SSB sets is the same.

[0030] As an exemplary embodiment, the transmission unit further comprises: The aforementioned K is configured to be transmitted to the terminal device as a scan period expansion coefficient.

[0031] In one exemplary embodiment, the transmission unit specifically comprises: The system is configured to transmit K as a scan period expansion coefficient to the terminal device via system message SIB1 or radio resource control RRC reconfiguration message.

[0032] As an exemplary embodiment, the setting unit further comprises: When the multiplexing pattern between the SSB and the control resource set CORESET0 is set as multiplexing pattern 1, the SSB scan period is configured to be 20 milliseconds or longer.

[0033] As an exemplary embodiment, the transmission unit further comprises: The configured SSB scan cycle is sent to the terminal device via an SIB1 message or an RRC reconstruction message.

[0034] As an exemplary embodiment, the setting unit further comprises: In the paging setting parameters, K paging frames are grouped into one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunity MOs set for each paging opportunity is the same as the number of SSB beams included in one SSB set, and the monitoring opportunity MOs and SSB beams are configured to correspond one-to-one.

[0035] As an exemplary embodiment, the setting unit further comprises: In the paging setting parameters, N for each wake-up period. update A paging frame is set up, each paging frame corresponding to one paging opportunity, each paging opportunity PO contains K search spaces, the number of monitoring opportunities MO set up in each search space is the same as the number of SSB beams in one SSB set, and the x*S+Mth paging physical downlink control channel PDCCH MO located in the kth search space in PO is configured to correspond to the Mth transmitted SSB. Here, N update=N / K is the number of paging frames in a pre-set wake-up period, k is the position of the SSB beam corresponding to the terminal device in K SSB sets, X is the number of MOs mapped to one SSB, the range of x is a natural number between [0, X-1], S is the number of SSB beams in one SSB set, and the range of M is a natural number between [1, S].

[0036] As an exemplary embodiment, the transmission unit further comprises: The paging setting parameters are configured to be transmitted to terminal devices via SIB1 messages or RRC reconfiguration messages.

[0037] In a fourth aspect, the embodiment of the present application is an extension device for a synchronous signal block SSB applied to terminal equipment, A receiving unit configured to receive the scan period expansion coefficient K transmitted by the satellite-borne base station after establishing a connection with the satellite-borne base station, A processing unit configured to determine a new SSB scan period based on the current SSB scan period and the scan period expansion coefficient K, A search unit configured to scan and search for an SSB beam in the aforementioned new SSB scan cycle, Further extensions for the synchronous signal block SSB are provided, including the synchronous signal block.

[0038] As an exemplary embodiment, the receiving unit specifically comprises: The satellite-borne base station is configured to receive the scan period expansion coefficient K transmitted via an SIB1 message or an RRC reconstruction message.

[0039] As an exemplary embodiment, the processing unit further comprises: Before establishing a connection with the satellite-borne base station, the system is configured to determine the target SSB scan period based on a preset target scan period expansion coefficient and an initial SSB scan period. The search unit is further configured to scan and search the SSB beam at the target SSB scan period to determine the initial SSB.

[0040] In one exemplary embodiment, the target scan period expansion coefficient is the maximum value among at least one preset scan period expansion coefficient.

[0041] In one exemplary embodiment, the current SSB scan period is determined in accordance with an SIB1 message or RRC reconfiguration message transmitted by the satellite-borne base station.

[0042] As an exemplary embodiment, the receiving unit further comprises: The satellite-borne base station is configured to receive paging configuration parameters transmitted via SIB1 messages or RRC reconfiguration messages.

[0043] As an exemplary embodiment, the processing unit further comprises: Based on the paging setting parameters, the starting wireless frame SFN of the paging frame group where the terminal device is located is determined using Equation 1, the paging frame of the terminal device corresponds to the kth paging frame of the paging frame group, the position of the kth paging frame is determined using Equation 2, and the monitoring opportunity MO of the terminal device is configured to be the physical downlink control channel PDCCH MO corresponding to the lth SSB of the paging opportunity corresponding to the kth paging frame.

[0044]

number

[0045]

number

[0046] As an exemplary embodiment, the processing unit further comprises: Based on the paging setting parameters, the starting wireless frame SFN of the paging frame in which the terminal device is located is determined using Equation 3, and the monitoring opportunity MO of the terminal device is configured to be the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space.

[0047]

number

[0048] In a fifth aspect, embodiments of the present application provide an extension device for a synchronous signal block SSB, comprising a processor and a memory, the memory being configured to store a program executable by the processor, and the processor being configured to read the program in the memory and perform steps of the method described in either the first or second aspect.

[0049] In a sixth aspect, embodiments of the present application further provide a computer storage medium which, when executed by a processor, stores a computer program for performing the steps of the method described in either the first or second aspect.

[0050] In the seventh aspect, the present application provides a computer program product which, when executed on a computer, causes the computer to perform steps of the method described in either the first or second aspect.

[0051] These or other aspects of the present application will be more readily understood through the following description of the embodiments. [Brief explanation of the drawing]

[0052] In order to more clearly explain the technical aspects of the embodiments of the present application, the drawings used in describing the embodiments will be briefly described below. However, the drawings in the following description represent only a limited number of embodiments of the present application, and it goes without saying that those skilled in the art can obtain other drawings based on these drawings without any creative effort. [Figure 1] This is a schematic diagram illustrating the principle of the method for extending the synchronization signal block SSB according to an embodiment of the present invention. [Figure 2] This is a schematic flowchart of the method for extending the synchronization signal block SSB according to the embodiment of the present invention. [Figure 3] This is a schematic diagram illustrating the principle of the method for determining the monitoring slot according to the embodiment of the present invention. [Figure 4] This is a schematic diagram illustrating the principle of setting the time-domain position of the PDCCH MO corresponding to the terminal device according to the embodiment of the present invention. [Figure 5] This is another schematic diagram illustrating the principle of setting the time-domain position of the PDCCH MO corresponding to the terminal device according to the embodiment of the present invention. [Figure 6] This is another schematic flowchart of the method for extending the synchronization signal block SSB according to the embodiment of the present application. [Figure 7]This is a schematic diagram of an extension device for a synchronization signal block (SSB) according to an embodiment of the present invention. [Figure 8] This is another schematic diagram of an extension device for a synchronization signal block SSB according to an embodiment of the present invention. [Figure 9] This is a schematic diagram of an extended device for a synchronization signal block (SSB) according to an embodiment of the present invention. [Figure 10] This is another schematic diagram of an extension device for a synchronization signal block (SSB) according to an embodiment of the present invention. [Modes for carrying out the invention]

[0053] The present application will be described in more detail below with reference to the drawings in order to further clarify its purpose, technical aspects and advantages. It will be clear that the embodiments described are only a part of, and not all, of the embodiments of the present application. Any other embodiments that a person skilled in the art could obtain based on the embodiments of the present application without requiring any creative work are all included within the scope of protection of the present application.

[0054] In the embodiments of this application, "and / or" expresses a related relationship between the related objects, indicating that three relationships are possible. For example, A and / or B can represent three cases: A exists alone, both A and B exist, or B exists alone. The character " / " generally indicates that the related objects have an "or" relationship.

[0055] The application scenarios described in the embodiments of this application are intended to more clearly illustrate the technical aspects of the embodiments and do not limit the technical aspects of the embodiments. Those skilled in the art will understand that, as new application scenarios emerge, the technical aspects of the embodiments of this application can be similarly applied to similar technical problems. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0056] Before describing the method for extending the synchronization signal block SSB according to the embodiment of the present invention, we will first explain the technical background of the embodiment in detail for ease of understanding.

[0057] SSB is a broadcast beam proposed for the 5th generation mobile communication technology 5G NR system, and consists of PSS, SSS, and PBCH.

[0058] In 5G systems, on the one hand, beamforming allows the use of narrow beams instead of conventional wide beams, enabling precise targeting of horizontal and vertical radiated energy to the target user and enhancing the coverage performance of the common channel / control channel. On the other hand, beam scanning techniques allow for scanning and transmitting different SSB beams at regular intervals, covering the entire cell and improving area coverage.

[0059] In 3GPP NTN, in transparent transmission mode, only local beam position coverage needs to be considered, and existing SSB beam design solutions for 5G NR can be used as is. In the time domain, the number of slots available for transmitting synchronous signal blocks within a single system half-frame is limited, and depending on the subcarrier spacing and frequency setting, the maximum number of SSB transmissions within a half-frame or a single SSB cycle is 4, 8, or 64. Specifically, in NR, there are many different cases for the time domain mode of SSB transmission, with SSB transmissions within a single SSB cycle limited to a 5-millisecond (ms) half-frame window, and the maximum number of SSBs in an SSB set is 4 in the frequency range below 3 gigahertz (GHz). When the frequency range is from 3 GHz to 6 GHz, the maximum number of SSBs in an SSB set is 8. When the frequency range is from 6 GHz to 52.6 GHz, the maximum number of SSBs in an SSB set is 64, thereby achieving a trade-off between coverage range and resource overhead. Thus, in existing technological configurations, the maximum number of SSBs in an SSB set is 4, 8, or 64, meaning that within one cycle, the maximum number of SSBs that can be covered by scanning is only 4, 8, or 64 beam positions.

[0060] On the other hand, the main development direction for low Earth orbit satellite communication systems today is to provide global broadband access services to ground or low-altitude users. However, low Earth orbit satellites are small, have limited platform resources (e.g., limited power, limited number of simultaneous beams), and the distribution of ground services is uneven, presenting many challenges in designing satellite-ground access solutions that require full area coverage. In existing technological forms, the maximum number of SSBs in an SSB set is 4 / 8 / 64, making it difficult to meet the thousands of beam positions required for full area coverage.

[0061] In view of this, embodiments of the present invention provide a method, device, medium, and program product for extending a synchronous signal block SSB, wherein, on the satellite-borne base station side, if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, K sets of SSB beams are transmitted to the current cell, ensuring that the total number of SSB beams in the K sets of SSB beams is greater than the number of beam positions, and that beams with the same index in different SSB sets point to different beam positions. In this way, by equivalently extending the number of SSBs across SSB periods, it is possible to cover more beam positions without changing the SSB time-domain resources and the maximum number of SSBs transmitted within the half-frame window defined in the current 3GPP 5G NR protocol.

[0062] After explaining the technical background of the embodiments of this application, the inventive concept of the SSB extension embodiment according to this application will be explained in detail below with reference to Figure 1.

[0063] The SSB extension method according to the embodiment of the present invention equivalently expands or increases the number of SSBs by extending the SSB scan period of the terminal equipment. That is, from the perspective of the terminal equipment, the SSB scan period is extended to an integer multiple of the original SSB scan period, and from the perspective of the satellite-borne base station, the SSB set does not change, but beams with the same index in different SSB sets point to different ground beam positions until all beam positions in the entire cell are covered.

[0064] As shown in Figure 1, the number of beam positions that the satellite-borne base stations (gNodeB, gNB) need to cover with the current cell is 64, meaning there are 64 beam positions within the current cell's coverage range. For example, if the subcarrier spacing is 30 kHz and the frequency range is 3 GHz to 6 GHz, and we adopt SSB time-domain mode case C, there are 8 SSBs per SSB period, corresponding to SSB indices 0 to 7, and distributed in the time domain within the half frame preceding each SSB period.

[0065] In the embodiments of this invention, the SSB scan period of a terminal device is extended to eight of the existing SSB periods. Within each SSB period, eight corresponding beams serve eight different beam positions. With 64 SSBs across eight periods, the transmission of 64 beam positions and synchronization signal blocks is completed by time-division and spatial division. For a terminal device at a given beam position, the corresponding SSB beam can be uniquely identified by indexing the k-th period and the l-th (lowercase L) beam within that period.

[0066] After explaining the inventive concept of the embodiments of this application, the method of extending the SSB according to the embodiments of this application will be described in detail below with reference to specific embodiments.

[0067] As shown in Figure 2, when the method for extending the synchronization signal block SSB according to this embodiment is applied to a satellite-borne base station, the implementation flow is as follows.

[0068] In step 201, if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, then K sets of SSB beams (where K is a natural number greater than 1) are transmitted to the current cell, and the total number of SSB beams in the K sets of SSB beams is greater than the number of beam positions.

[0069] The number of beam positions to be serviced by a satellite-borne base station is usually less than or equal to the total number of beam positions covered by the satellite-borne base station. For example, in actual applications, depending on the configuration of the satellite-borne base station, if it is necessary for the base station to scan only beam positions within a portion of its coverage area, the beam positions within this portion of the area are the beam positions to be serviced by the satellite-borne base station.

[0070] In specific implementations, the number of beam positions to be serviced by the satellite-borne base station may be obtained from the configuration parameters of the base station or cell, or determined by methods of related technology, and is not limited to these methods in the embodiments of the present application.

[0071] In practical implementation, if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, K SSB sets are configured, and the total number of SSB beams in these K SSB sets is greater than the number of beam positions to be serviced by the satellite-borne base station. Of course, if the number of beam positions to be serviced by the satellite-borne base station is less than or equal to the number of SSB beams transmitted within each half-frame window in the current time-domain mode of SSB transmission, then only one SSB set needs to be configured, i.e., K is equal to 1. An SSB set refers to the collection of SSB beams transmitted within each SSB period.

[0072] Note that the number of SSB beams included in each of the K SSB sets may be the same. For example, if the number of beam positions to be served by a carrier base station is 90 and the maximum number of SSB beams transmitted within each SSB period is 64, two SSB sets can be set, and each SSB set can include 45 SSB beams. In other embodiments of the present application, the number of SSB beams included in each of the K SSB sets may be the same or different. Still, assuming that the number of beam positions to be served by a satellite-mounted base station is 90 and the maximum number of SSB beams transmitted within each SSB period is 64, two SSB sets can be set, one SSB set can include 50 SSB beams, and the other SSB set can include 40 SSB beams.

[0073] Hereinafter, taking the case where the number of SSB beams included in each of the K SSB sets is the same as an example, the determination form of K will be described.

[0074] Assuming that in one cell, the number of beam positions to be served by a satellite-mounted base station is N b If a specific frequency band and subcarriers are determined (that is, when the time-domain mode CaseX of SSB transmission is clear), the maximum number of SSBs that can be transmitted within each SSB period (or each half-frame window) is L max and N b > L max In this case, in order to cover the beam positions to be served, it is necessary to set K SSB sets, and K can be calculated from the following formula (1).

[0075]

Equation

[0076] In practical applications, considering resource overhead, within a half-frame period, L max There may not be enough resources to complete the transmission of each beam, and at the same time, in a time-division duplexing (TDD) system, the transmission delay in the satellite communication system is large, resulting in a relatively long guard period (GP) slot within each SSB period. max It is common to lack sufficient downlink time-domain resources to complete a scan of a single beam.

[0077] Therefore, in the embodiments of this application, L is defined as the number of beams actually transmitted within each SSB period, taking into account a comprehensive balance between coverage range and resource overhead. The same SSB extension method is employed in both the FDD and TDD systems. However, the number of beams that can actually be transmitted within the same SSB period differs between the FDD and TDD systems (because the downlink slot resources of the TDD system are less than those of the FDD system). Consequently, to cover the same number of beam positions, the TDD system requires extending the SSB period by more times.

[0078] If we attempt to cover the beam positions that should be served based on the number of beams actually transmitted within each modified SSB period, K is modified as follows: (2)

[0079]

number

[0080] K is also called the SSB scan period expansion coefficient of the terminal device. In other words, the SSB scan period of the terminal device needs to be expanded to K times the original SSB scan period, and K*L over the entire expanded scan period of the terminal device. max There are several valid SSB beam transmission times, but in reality, K*L beams are transmitted.

[0081] In practical implementation, the existing information element ssb-PositionsInBurst in the 3GPP 5G NR protocol can indicate which time-domain position beams a satellite-borne base station transmitted within K SSB periods. Assuming the ssb-PositionsInBurst bit is not expanded, the K SSB periods will use the same bitmap. Here, the L bit is set to 1, indicating that the corresponding L SSBs are transmitted.

[0082] In step 202, K sets of SSBs are transmitted to the current cell, and beams with the same index in different SSB sets point to different beam positions.

[0083] In specific implementation, in the embodiment of the present invention, when transmitting K sets of SSBs to the current cell, the configuration related to the SSB period, such as the length of the SSB period and the time-frequency domain position of the SSB, is not changed. The beam corresponding to each SSB within the extended period of the satellite-borne base station covers beam positions at different locations. That is, within different SSB periods, beams with the same index point to beam positions at different locations.

[0084] In practical implementation, the satellite-borne base station can also transmit K as a scan period expansion factor to the terminal equipment, instructing the terminal equipment to expand the SSB scan period by a factor of K.

[0085] In practical implementation, when K is to be transmitted to terminal equipment as a scan period extension coefficient, it can be transmitted to terminal equipment as a scan period extension coefficient via a system message (SystemInformationBlockType1, SIB1) or a Radio Resource Control (RRC) reconfiguration message.

[0086] In the case of terminal devices, the determination of the SSB scan cycle can be divided into the following two cases:

[0087] Before the terminal device establishes a connection with the satellite-borne base station, that is, before the terminal device receives an SIB1 message, the terminal device's SSB scan period is a preset initial SSB scan period, for example, the initial SSB scan period is 20 ms.

[0088] After the terminal device establishes a connection with the satellite-borne base station, the terminal device's SSB scan cycle is determined according to the SIB1 message or RRC reconfiguration message transmitted by the satellite-borne base station.

[0089] Thus, terminal equipment located at a specific beam position within the current cell must scan within the extended SSB period to perform initial beam selection and select the strongest SSB beam pointing to the current beam position based on the relevant policy (e.g., based on Reference Signal Receiving Power (RSRP)).

[0090] Similarly, adaptive design is required for paging opportunities, random access opportunities, and other aspects of the SSB configuration. For example, if the strongest beam is in the k-th SSB period, then SSB operations such as random access opportunities or paging opportunities should all be associated with the k-th period.

[0091] Specifically, in existing 3GPP 5G protocols, detailed SSB information (e.g., period, actual transmitted SSB bitmap, etc.) is communicated to terminal equipment via SIB1 messages or RRC reconfiguration messages. This includes at least the following two information elements:

[0092] ssb-PositionsInBurst: Indicates the time-domain position of an SSB transmitted within an SSB period (a set of SSBs within a half-frame window). The first bit or the leftmost bit corresponds to SSB index 0, the second bit corresponds to SSB index 1, and so on. A value of 0 in the bitmap indicates that the corresponding SSB is not being transmitted. A value of 1 indicates that the corresponding SSB is being transmitted.

[0093] ssb-periodicityServingCell: The SSB period (in milliseconds) for rate matching, i.e., the half-frame period during which an SSB set is transmitted. Existing 3GPP NRs define the possible values ​​for the SSB period as 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms. Regardless of the length of the SSB period, the SSB sets within each SSB period are concentrated within a 5ms window. If this field is not present, the terminal device defaults to an SSB period of 5ms.

[0094] The two information elements mentioned above are defined in ServingCellConfigCommon and ServingCellConfigCommonSIB. The actual SSB scan period extension coefficient K of the terminal device can also be defined in a similar manner; for example, the information element "ssb-PeriodCoeff" is defined in ServingCellConfigCommon and ServingCellConfigCommonSIB and sent to the terminal device. Specifically, it is interpreted as follows.

[0095] This is the actual SSB scan period extension coefficient of ssb-PeriodCoeff:UE, i.e., the parameter K described in the embodiment of this application. In milliseconds (ms), the SSB scan period of the terminal device is extended to m = ssb - PeriodCoeff * ssb - periodicityServingCell milliseconds. This indicates how many SSB periods the SSB scan period of the terminal device can span. Within a period of m milliseconds, there is and only one SSB beam that points to the beam position where the terminal device is located, corresponding to the l-th SSB beam within the k-th SSB period (where k ∈ [1,…,K], l ∈ [1,…,L]). max Assuming ]), (k,l) can uniquely represent one SSB within the entire SSB extended period.

[0096] During the initial downlink synchronization process, before the terminal device receives the SIB1 message, the default SSB period is 20ms, and the default extended SSB period is the maximum value defined by the information element "ssb-PeriodCoeff," which can be defined as an integer value such as 8, 16, or 32.

[0097] In practical applications, a larger SSB extension period coefficient K results in a longer actual SSB scan period for terminal equipment, leading to a corresponding increase in average access delay, switching delay, and paging delay. As the number of beam positions that a single cell can cover increases, i.e., as the coverage area increases, it becomes necessary to consider the balance between area coverage and access delay comprehensively when actually deploying the network and select a specific value for K.

[0098] Furthermore, in the form in which the SSB periodic spreading coefficient is notified to terminal devices by the definition of the information element described above, the definition of the information element ssb-PeriodCoeff is a cell-level definition and is consistent across all terminal devices within the cell. The above form is merely one example of a definition, and this application does not restrict the specific definition form of the SSB periodic spreading coefficient in the protocol. For example, the SSB periodic spreading coefficient can also be implicitly transmitted by multiplexing the higher bits of the frame number.

[0099] The terminal device can directly calculate its position in the extended SSB period, i.e., index k, within the SSB period in which it is currently located, using the information element ssb-PeriodCoeff, the index of the strongest received SSB beam, and the system frame number. In subsequent access and paging schemes, the terminal device only needs to focus on access opportunities, paging opportunities, etc., within or related to SSBs within its current SSB period (i.e., (k,l)).

[0100] The following describes the extension of the synchronization signal block SSB according to the embodiment of the present invention, and its impact on existing communication systems that require the use of SSB or are related to SSB transmission, with reference to specific embodiments.

[0101] 1. Impact on Downlink Time-Frequency Synchronization In existing systems, the default SSB period for terminal equipment is 20ms during the initial downlink time-frequency synchronization process. Extending the SSB scan period has two potential impacts on the system (using the 20ms SSB period as an example).

[0102] From the perspective of a satellite-borne base station, the SSB period is still 20ms, but within different SSB periods, the base station scans for different beam positions, and after K SSB periods have ended, it starts again from the initial beam position.

[0103] From the perspective of terminal equipment, the SSB scan period is extended by a factor of K. That is, within K SSB periods, only one beam scans the beam position where the terminal equipment is located. From the perspective of developing and implementing initial cell search for terminal equipment, terminal equipment can use the same processing power as when the existing SSB period is the default 20ms, but processing for K periods is required. Therefore, the extension of the SSB scan period increases the access delay for terminal equipment.

[0104] 2. Impact on the time domain setting of SIB1 Section 13 of Protocol 38.213 defines mapping tables between Type0-PDCCH monitoring opportunities and searchSpaceZero information, namely Tables 13-11 to 13-15A.

[0105] When the multiplexing pattern between the SSB and CORESET0 adopts multiplexing pattern 1, the terminal device monitors Type0-PDCCH in two consecutive slots, and these two consecutive slots function as a monitoring window containing opportunities to monitor Type0-PDCCH, with the starting slot number being n0 and the period of the monitoring window being 20ms, and within each period, each SSB with index i corresponds to one Type0-PDCCH monitoring window, and the starting slot number n0 of this monitoring window is determined by the following equation (3).

[0106]

number

[0107]

number

[0108] Wireless Frame Number SFN C It is defined in protocol 38.213 as follows:

[0109]

number

[0110]

number

[0111]

number

[0112]

number

[0113] In other words,

number

[0114] When the multiplexing pattern between SSB and CORESET0 employs multiplexing patterns 2 and 3, the terminal device monitors Type0-PDCCH within one slot, and the period of this monitoring slot is equal to the SSB period. Within each monitoring period, the number n of the monitoring slot corresponding to the SSB with index i. c and the wireless frame number SFN in which it is located c This is associated with the wireless frame and slot in which the SSB is located, and is a one-to-one correspondence, which can be determined by mapping tables 13-13 to 13-15 between monitoring opportunities and searchSpaceZero information.

[0115] Taking Table 13-11, which corresponds to FR1, as shown in Table 1 below, if the index is 4, the SSB index is 3, and the subcarrier interval is 30 kHz, then by examining the table, we can determine that O=5 and M=1 in this case. Calculating using the formula, we obtain n0=13, and SFN c If the frame number is even, the monitoring slots are 13 and 14, as shown in Figure 3.

[0116] [Table 1] Extending the SSB scan cycle has the following impact on the SIB1 monitoring slot:

[0117] If the multiplexing pattern between SSB and CORESET0 is multiplexing pattern 1, the period of SIB1 is 20ms, and if the SSB period is 20ms or longer, there are sufficient opportunities to monitor SIB1 within the SSB period (on average, one SSB can be considered to correspond to multiple monitoring opportunities).

[0118] From the perspective of a satellite-borne base station, the beam position that SIB1 points to during transmission within each SSB period coincides with the corresponding SSB beam within that period. That is, within K different SSB periods, the information transmitted by SIB1 remains the same, but the beam directionality differs. If the SSB period is less than 20ms, the monitoring opportunities for SIB1 within 20ms cannot correspond one-to-one with the SSB beams. For example, if the SSB period is 5ms, four identical SSB indices within 20ms correspond to two monitoring slots. If four SSB beams with the same index point to different beam positions, the four different beam positions cannot obtain equal monitoring slot opportunities. Therefore, when extending the SSB scan period, the SSB period must be set to 20ms or longer. (Slot number n0 and radio frame number SFN) C The calculation does not need to be adjusted.

[0119] From the perspective of the terminal equipment, for every K SSB periods, the terminal equipment only needs to monitor the SIB1 corresponding to the l-th SSB beam within the k-th SSB period (the SSB beam corresponding to the beam position where the terminal equipment is located).

[0120] When the multiplexing pattern between SSB and CORESET0 is multiplexing pattern 2 or multiplexing pattern 3, the period of the monitoring slot in CORESET0 is equal to the SSB period and corresponds one-to-one. Therefore, from the base station's perspective, the beam position that SIB1 points to during transmission within each SSB period should match the corresponding SSB beam within that period. From the terminal equipment's perspective, for every K SSB periods, the terminal equipment only needs to monitor the monitoring opportunity for SIB1 corresponding to the l-th SSB beam within the k-th SSB period (the SSB beam corresponding to the beam position where the terminal equipment is located), just as in the case of multiplexing pattern 1.

[0121] As mentioned above, extending the SSB scan period (i.e., K>1) does not affect the opportunity for SIB1, and if the multiplexing pattern between the SSB and the control resource set CORESET0 is set to multiplexing pattern 1, the SIB1 message should clearly indicate that the terminal device's SSB scan period should be set to 20 milliseconds or more.

[0122] 3. Impact on random access opportunities In NR, a terminal device has a chance to transmit a Physical Random Access Channel (PRACH) and perform random access only if the SSB beam scan signal covers the beam position where the terminal device is located. In other words, the transmission time or access opportunity (PRACH occasion, RO) of the PRACH needs to be mapped to the SSB index.

[0123] In addition to the PRACH setting period (i.e., x in tables 6.3.3.2-2 to 6.3.3.2-4 of protocol 38.211), the concept of an association period is also defined so that each SSB actually transmitted is mapped to at least one RO. One association period is a multiple of the PRACH setting period, and the specific definitions and possible values ​​are shown in Table 2.

[0124] [Table 2] One association period begins at system frame 0, and its duration is an integer multiple N of the PRACH setting period, with a maximum of 160 ms, as shown in Table 2. The specific value of N is determined by the following conditions.

[0125] If, for a given PRACH setting period, the corresponding association period can take multiple values, it takes the smallest value that satisfies the condition that each SSB can be mapped to at least one RO.

[0126] Furthermore, if there are any ROs that are not associated with an SSB after one association cycle, these ROs cannot be used for random access flows.

[0127] Thus, when configuring parameters related to Random Access Channels (RACH) in the 3GPP protocol, it is necessary to ensure that each SSB actually transmitted is mapped to at least one RO.

[0128] Therefore, extending the SSB scan cycle has the following effects on RO-related settings:

[0129] From the base station's perspective, the setting of RO opportunities corresponding to the SSB actually transmitted within each SSB period remains unaffected. It only needs to be in K different SSB periods, and within those different periods, the beam orientation for the same SSB index will differ. This only affects base station development and does not impact the parameters related to the SSB-RO time-frequency domain mapping rules in the protocol; therefore, parameter expansion is unnecessary.

[0130] 4. Impact on paging In 5G NR, terminal devices only need to wake up for a certain period of time to receive paging messages, and can enter sleep mode for the remaining time to reduce power consumption. The entire wake-up cycle is called a Discontinuous Reception (DRX) cycle. Within one DRX cycle, there are N paging frames (PFs), and one PF corresponds to Ns paging opportunities (POs). The terminal device wakes up only once within one DRX cycle, monitors a certain PO, and receives paging messages.

[0131] A PF is a single radio frame and may contain one or more POs or PO initiation frames. Within one DRX cycle, the initiation radio frame (SFN) of the paging frame corresponding to the terminal device is determined by equation (3) below, and the corresponding paging opportunity is determined by equation (4) below.

[0132] PF's SFN:

[0133]

number

[0134]

number

[0135] The value of the paging period T is determined by the parameter defaultPagingCycle and can be set to 32, 64, 128, or 256 radio frames (i.e., 10ms). The values ​​of N and PF_offset are determined by the parameter nAndPagingFrameOffset. For example, if T is set to 64 radio frames, then if N takes the value of halfT, it means there are 32 paging frames in one 640ms DRX period, with one paging frame for every two radio frames, and the value of PF_offset, which is 0 or 1, determines the amount of radio frame offset. The value of Ns is determined by the parameter ns and can take values ​​of 1, 2, or 4. A terminal device can determine the system frame number SFN for receiving paging messages by calculating PF, and further calculate i_s to monitor the paging message in the (i_s+1)th PO within that paging frame.

[0136] NR employs multi-beam operation, and according to the definition in TS 38.304, a PO is a group of Physical Downlink Control Channel (PDCCH) Monitoring Occasions (MOs) that may contain multiple slots (e.g., subframes or OFDM symbols), and paging DCI can be transmitted during these occasions (see TS 38.213). Different monitoring occasions correspond to different transmission beams, and the same paging message and the same short message are repeated on all transmission beams. The terminal equipment implementation determines which beam to select for receiving the paging message and short message. Here, the time-domain resource for the PDCCH MO is indicated by the pagingSearchSpace specified in TS 38.213 (by adding the CORESET corresponding to this searchspace, the time-frequency domain resource for receiving PDCCH scrambled with P-RNTI can be specifically determined).

[0137] In existing 3GPP protocols, the SSB period is smaller than the DRX paging period, and the number of paging frames within the paging period and the number of paging opportunities within each paging frame can be dynamically adjusted for a given terminal device. When the number of users is relatively large, the base station can improve efficiency by setting more paging frames. In 38.331, the value of N in the information element nAndPagingFrameOffset is clearly defined when the SearchSpaceId of pagingSearchSpace is set to 0 or a value other than 0.

[0138] When the SSB scan period is extended, from the perspective of the terminal device, it is equivalent to extending the SSB period to "K*ssb-periodicityServingCell". Here, we define that K paging frames constitute one paging frame group. When calculating the wireless frame of the paging frame group in which the terminal device is located using equation (3), the value of N is calculated using equation (5) below. update It should be updated to [the correct version].

[0139]

number

[0140] Embodiment 1: A configuration in which paging frames are divided into groups. Specifically, in the paging setting parameters, K paging frames are grouped together as one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunity MOs set for each paging opportunity is the same as the number of SSB beams included in one SSB set, and there is a one-to-one correspondence between monitoring opportunity MOs and SSB beams.

[0141] In actual applications, there is only one SSB beam that points to the beam position where the terminal device is located, and it corresponds to the l-th SSB beam within the k-th SSB period. Here, k∈[1,…,K] and l∈[1,…,L] max] and both k and l are natural numbers.

[0142] After determining the paging frame group in which the terminal device is located, the terminal device's paging frame should correspond to the k-th paging frame in the current paging frame group, and its wireless frame position can be calculated using the following equation (6).

[0143]

number

[0144] In one example, as shown in Figure 4, if N=T / 2, PF_offset=1, K=2, Nupdate=T / 4, SSB period 20ms, and SCS=30KHz, after extending the SSB period using the SSB extension method according to the embodiment of the present invention, two paging frames are made into one paging frame group, each paging frame corresponds to one paging opportunity, and if the number of SSBs actually transmitted within each SSB period is 6, then 6 MOs are set for each PO, and each MO is mapped to a different SSB.

[0145] In the example shown in Figure 4, one paging opportunity is set for each paging frame. However, in actual applications, ns paging opportunities may be set for each paging frame, and the definition of ns is consistent with existing protocols. Its value may be 1, 2, or 4.

[0146] In this embodiment, by dividing the paging frames into groups, the paging opportunities corresponding to terminal equipment on beam positions corresponding to all SSBs within the K SSB period are evenly allocated. From the perspective of a terminal equipment, it only needs to focus on the PDCCH MO corresponding to the l-th SSB among the paging opportunities corresponding to the k-th paging frame in its paging frame group. In this form of dividing the paging frames into groups, there is no need to change the definition of PO in existing protocols.

[0147] Embodiment 2: An embodiment that expands the number of MOs corresponding to POs. Specifically, in the paging setting parameters, N for each wake-up period. update A paging frame is set up, each paging frame corresponds to one paging opportunity, each paging opportunity PO contains K searchspaces, the number of monitoring opportunities MO set up in each searchspace is the same as the number of SSB beams in one SSB set, and the x*S+Mth paging physical downlink control channel PDCCH MO located in the kth searchspace in PO corresponds to the Mth transmitted SSB.

[0148] Here, k is the position of the SSB beam corresponding to the terminal device in the K SSB sets, X is the number of MOs mapped to one SSB, and the range of x is a natural number between [0, X-1], S is the number of SSB beams included in one SSB set, and the range of M is a natural number between [1, S].

[0149] In this embodiment, the concept of paging frame groups is not defined, and the starting radio frame SFN of the paging frame in which the terminal device is located is determined by equations (5) and (3). For ease of configuration, it is defined that there is only one PO (ns=1) within a paging frame, but this PO contains a PDCCH MO corresponding to all SSBs actually transmitted within K SSB periods, and this PO can span multiple SearchSpace periods.

[0150] In one example, as shown in Figure 5, if N=T / 2, PF_offset=1, K=2, Nupdate=T / 4, SSB period 20ms, and SCS=30KHz, after extending the SSB period using the SSB extension method according to the embodiment of the present invention, T / 4 paging frames are set, each paging frame corresponds to one paging opportunity, and each paging opportunity includes two search spaces, namely search space SS0 and search space SS1 as shown in the figure. If the number of SSBs actually transmitted within each SSB period is 6, then 12 MOs are set for each PO, 6 MOs are set for each search space, and each MO is mapped to an SSB of a different SSB set.

[0151] Specifically, after extending the SSB scan period, terminal equipment on beam positions corresponding to all SSB beams actually transmitted within K SSB periods should have a corresponding monitoring opportunity. That is, the number of monitoring opportunities in one paging opportunity PO has been extended from "S*X" as defined in the existing protocol (section 7.1 of 38.304 clearly defines the number of MOs in one PO) to "K*S*X", and refer to protocol 38.304 for the definitions of S and X and which parameters result in them.

[0152] From a resource scheduling perspective, it must be ensured that the "K*S*X" MOs are distributed relatively evenly within K SSB cycles, especially when the value of K is relatively large, rather than occupying consecutive slot resources. Therefore, it is appropriate to set the SearchSpaceId of pagingSearchSpace to a value other than 0 after extending the SSB scan cycle, and NOTE 2 of Section 7.1 of 38.304 clearly states that when the SearchSpaceId of pagingSearchSpace is set to a value other than 0, PDCCH MOs within a single PO can span multiple SearchSpace cycles, thereby ensuring that the "K*S*X" MOs are distributed evenly within the paging frame (spanning K or more SSB cycles).

[0153] The existing protocol 38.304 definition, "The [x*S+M]th paging PDCCH MO of a PO corresponds to the Mth transmitted SSB, where x=0,1,...,X-1, and M=1,2,...,S", can be updated to "If K is greater than 1, i.e., if an extended scan period exists, the [x*S+M]th paging PDCCH MO located in the kth SearchSpace period of the PO corresponds to the Mth transmitted SSB, where x=0,1,...,X-1, and M=1,2,...,S".

[0154] In the above embodiment 2, it is necessary to set ns to 1 when setting parameters, and if this number is expanded to "K*S*X", time-domain resources become insufficient. Setting ns to 1 makes it easier to set the parameters of the corresponding SearchSpace. The SearchSpaceId of pagingSearchSpace is set to a value other than 0. The SearchSpace period can be set to an SSB period or an integer multiple of an SSB period so as to ensure that "K*S*X" MOs are distributed relatively uniformly within multiple SSB periods. Within the k-th SearchSpace period, there are "S*X" PDCCH MOs corresponding to the K-th transmitted SSB within the k-th SSB period.

[0155] In addition, in both Embodiment 1 and Embodiment 2, if K is greater than 1, both the base station and the terminal equipment set nAndPagingFrameOffset, N update It must be guaranteed that is 1 or greater, that is, that for an extended scan period, there must be at least one paging frame within one paging period. For example, if K is equal to 2, the value of N must be half of what it is when K is equal to 1 in order to guarantee that there is at least one paging frame within one paging period.

[0156] The above describes the method for extending the SSB on the satellite-borne base station side and its impact on the related flows after SSB period extension according to the embodiment of the present invention. Now, with reference to Figure 6, the corresponding implementation flow on the terminal equipment side of the SSB extension method according to the embodiment of the present invention will be described.

[0157] As shown in Figure 6, an embodiment of the present invention provides a method for extending a synchronous signal block SSB applied to terminal equipment, the method comprising the following steps 601 to 603.

[0158] In step 601, after establishing a connection with the satellite-borne base station, the scan period expansion coefficient K transmitted by the satellite-borne base station is received.

[0159] In step 602, a new SSB scan period is determined based on the current SSB scan period and the scan period expansion coefficient K.

[0160] In step 603, the SSB beam is scanned and searched with a new SSB scan cycle.

[0161] In the specific implementation, the step of receiving the scan period expansion coefficient K transmitted by the satellite-borne base station is: The process includes receiving a scan period expansion coefficient K transmitted by a satellite-borne base station via an SIB1 message or an RRC reconfiguration message.

[0162] In actual applications, before a terminal device establishes a connection with a satellite-borne base station, the terminal device needs to determine a target SSB scan period based on a preset target scan period expansion factor and initial SSB scan period, and then scan and search the SSB beam at the target SSB scan period to determine the initial SSB.

[0163] The target scan period expansion factor is the maximum value among at least one preset scan period expansion factor. For example, if the preset scan period expansion factors include 4, 8, 16, or 32, the target scan period expansion factor is 32. Of course, in other embodiments of the present application, other scan period expansion factors can also be used as the target scan period expansion factor.

[0164] Before establishing a connection with the satellite-borne base station, that is, before the terminal equipment receives the SIB1 message transmitted by the satellite-borne base station, the terminal equipment's SSB scan period is a preset initial SSB scan period, for example, the initial SSB scan period is 20 ms.

[0165] After establishing a connection with the satellite-borne base station, that is, after the terminal equipment receives an SIB1 message transmitted by the satellite-borne base station, the SSB scan period of the terminal equipment is determined according to the SIB1 message or RRC reconfiguration message transmitted by the satellite-borne base station.

[0166] In practical applications, terminal equipment further receives paging configuration parameters transmitted by the satellite-borne base station via SIB1 messages or RRC reconfiguration messages.

[0167] Depending on the configuration in which the time-domain position of the PDCCH MO is set on the satellite-borne base station side, the process by which terminal equipment determines the MO based on paging setting parameters can similarly be divided into two embodiments, specifically as follows:

[0168] Embodiment 1: The satellite-borne base station configures the MO by dividing the paging frames into groups.

[0169] Based on the paging configuration parameters, the starting radio frame SFN of the paging frame group where the terminal device is located is determined using equation (7). The terminal device's paging frame corresponds to the kth paging frame of the paging frame group, the position of the kth paging frame is determined using equation (8), and the terminal device's monitoring opportunity MO is the physical downlink control channel PDCCH MO corresponding to the lth SSB of the paging opportunity corresponding to the kth paging frame.

[0170]

number

[0171]

number

[0172] Embodiment 2: The satellite-borne base station configures the MO in a manner that expands the number of MOs corresponding to the PO.

[0173] Based on the paging configuration parameters, the starting radio frame SFN of the paging frame in which the terminal device is located is determined using equation (7), and the monitoring opportunity MO of the terminal device is the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space.

[0174] Here, k is the position of the SSB beam corresponding to the terminal device in the K SSB sets, and l is the position of the SSB beam corresponding to the terminal device in the k-th SSB set.

[0175] Based on a similar inventive concept, as shown in Figure 7, an embodiment of the present application further provides an extension device for a synchronous signal block SSB applicable to a satellite-borne base station, the device including a configuration unit 701 and a transmission unit 702.

[0176] The configuration unit 701 is configured to transmit SSB beams to the current cell in K SSB sets if the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, and the total number of SSB beams in the K SSB sets (where K is a natural number greater than 1) is greater than the number of beam positions.

[0177] The transmitting unit 702 is configured to transmit K SSB sets to the current cell, with beams of the same index in different SSB sets pointing to different beam positions.

[0178] In one exemplary embodiment, each of the K SSB sets contains the same number of SSB beams.

[0179] As an exemplary embodiment, the transmitting unit 702 further includes: K is configured to be transmitted to the terminal device as a scan period expansion coefficient.

[0180] In one exemplary embodiment, the transmitting unit 702 specifically includes: The system is configured to transmit K as the scan period expansion coefficient to terminal equipment via system message SIB1 or radio resource control RRC reconfiguration message.

[0181] As an exemplary embodiment, the setting unit 701 further includes: If the multiplexing pattern between the SSB and the control resource set CORESET0 is set to multiplexing pattern 1, the SSB scan period is configured to be 20 milliseconds or longer.

[0182] As an exemplary embodiment, the transmitting unit 702 further includes: The configured SSB scan cycle is sent to the terminal device via an SIB1 message or an RRC reconfiguration message.

[0183] As an exemplary embodiment, the setting unit 701 further includes: In the paging configuration parameters, K paging frames constitute one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunity MOs set for each paging opportunity is the same as the number of SSB beams included in one SSB set, and the monitoring opportunity MOs and SSB beams are configured to correspond one-to-one.

[0184] As an exemplary embodiment, the setting unit 701 further includes: In the paging setting parameters, N for each wake-up period. update A paging frame is set up, each paging frame corresponding to one paging opportunity, each paging opportunity PO contains K search spaces, the number of monitoring opportunities MO set up in each search space is the same as the number of SSB beams in one SSB set, and the x*S+Mth paging physical downlink control channel PDCCH MO located in the kth search space in PO is configured to correspond to the Mth transmitted SSB. Here, N update=N / K is the number of paging frames in a pre-set wake-up period, k is the position of the SSB beam corresponding to the terminal device in K SSB sets, X is the number of MOs mapped to one SSB, the range of x is a natural number between [0, X-1], S is the number of SSB beams in one SSB set, and the range of M is a natural number between [1, S].

[0185] As an exemplary embodiment, the transmitting unit 702 further includes: The paging configuration parameters are configured to be sent to terminal devices via SIB1 messages or RRC reconfiguration messages.

[0186] Based on a similar inventive concept, as shown in Figure 8, an embodiment of the present application further provides an extension device for a synchronous signal block SSB applied to terminal equipment, which includes a receiving unit 801, a processing unit 802, and a search unit 803.

[0187] The receiving unit 801 is configured to receive the scan period expansion coefficient K transmitted by the satellite-borne base station after establishing a connection with the satellite-borne base station.

[0188] The processing unit 802 is configured to determine a new SSB scan period based on the current SSB scan period and the scan period expansion coefficient K.

[0189] The search unit 803 is configured to scan and search the SSB beam with a new SSB scan cycle.

[0190] In one exemplary embodiment, the receiving unit 801 specifically includes: The satellite-borne base station is configured to receive the scan period expansion coefficient K transmitted via SIB1 messages or RRC reconstruction messages.

[0191] As an exemplary embodiment, the processing unit 802 further includes: Before establishing a connection with the satellite-borne base station, the system is configured to determine the target SSB scan period based on a preset target scan period expansion factor and initial SSB scan period. The search unit 803 is further configured to scan and search the SSB beam at a target SSB scan period to determine the initial SSB.

[0192] In one exemplary embodiment, the target scan period expansion coefficient is the maximum value among at least one preset scan period expansion coefficient.

[0193] In one exemplary embodiment, the current SSB scan cycle is determined in accordance with an SIB1 message or RRC reconfiguration message transmitted by a satellite-borne base station.

[0194] As an exemplary embodiment, the receiving unit 801 further includes: The satellite-borne base station is configured to receive paging configuration parameters transmitted via SIB1 messages or RRC reconfiguration messages.

[0195] As an exemplary embodiment, the processing unit 802 further includes: Based on the paging configuration parameters, the starting radio frame SFN of the paging frame group where the terminal device is located is determined using Equation 1, the terminal device's paging frame corresponds to the kth paging frame of the paging frame group, the position of the kth paging frame is determined using Equation 2, and the terminal device's monitoring opportunity MO is configured to be the physical downlink control channel PDCCH MO corresponding to the lth SSB of the paging opportunity corresponding to the kth paging frame.

[0196]

number

[0197]

number

[0198] As an exemplary embodiment, the processing unit 802 further includes: Based on the paging configuration parameters, the starting radio frame SFN of the paging frame in which the terminal device is located is determined using Equation 3, and the monitoring opportunity MO of the terminal device is configured to be the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space.

[0199]

number

[0200] Based on a similar inventive concept, as shown in Figure 9, the embodiment of the present application further provides an extension device for the synchronization signal block SSB on the satellite-borne base station side, which includes a processor 900 and a memory 901, the memory 901 being configured to store a program that the processor 900 can execute, and the processor 900 reads the program in the memory 901, If the number of beam positions to be serviced by a satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, the step is to transmit SSB beams to the current cell in K SSB sets (where K is a natural number greater than 1), and the total number of SSB beams in the K SSB sets is greater than the number of beam positions. The system is configured to perform the steps of: transmitting K SSB sets to the current cell, wherein beams of the same index in different SSB sets point to different beam positions.

[0201] In one exemplary embodiment, each of the K SSB sets contains the same number of SSB beams.

[0202] As an exemplary embodiment, the processor 900 further includes: The system is configured to perform the step of sending K as a scan period expansion coefficient to a terminal device.

[0203] As an exemplary embodiment, the processor 900 specifically, The system is configured to perform the step of sending K as the scan period expansion coefficient to a terminal device via system message SIB1 or radio resource control RRC reconfiguration message.

[0204] As an exemplary embodiment, the processor 900 further includes: If the multiplexing pattern between the SSB and the control resource set CORESET0 is set to multiplexing pattern 1, the system is configured to perform a step that sets the SSB scan period to 20 milliseconds or more.

[0205] As an exemplary embodiment, the processor 900 further includes: The system is configured to perform a step of sending the configured SSB scan cycle to the terminal device via an SIB1 message or an RRC reconfiguration message.

[0206] As an exemplary embodiment, the processor 900 further includes: In the paging configuration parameters, K paging frames constitute one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunity MOs set for each paging opportunity is the same as the number of SSB beams in one SSB set, and the monitoring opportunity MOs and SSB beams are configured to perform one-to-one corresponding steps.

[0207] As an exemplary embodiment, the processor 900 further includes: In the paging setting parameters, N for each wake-up period. update A paging frame is set up, each paging frame corresponds to one paging opportunity, each paging opportunity PO contains K search spaces, the number of monitoring opportunities MO set up in each search space is the same as the number of SSB beams in one SSB set, and the x*S+M-th paging physical downlink control channel PDCCH MO located in the k-th search space in PO is configured to perform the step corresponding to the M-th transmitted SSB. Here, N update= N / K is the number of paging frames in a pre-set wake-up period, k is the position of the SSB beam corresponding to the terminal device in K SSB sets, X is the number of MOs mapped to one SSB, the range of x is a natural number between [0, X-1], S is the number of SSB beams in one SSB set, and the range of M is a natural number between [1, S].

[0208] As an exemplary embodiment, the processor 900 further includes: The system is configured to perform the step of sending paging configuration parameters to terminal devices via SIB1 messages or RRC reconfiguration messages.

[0209] Based on a similar inventive concept, as shown in Figure 10, the embodiment of the present application further provides an extension device for the synchronous signal block SSB on the terminal device side, which includes a processor 1000 and a memory 1001, the memory 1001 being configured to store a program that the processor 1000 can execute, and the processor 1000 reads the program in the memory 1001, The steps include: establishing a connection with the satellite-borne base station, and then receiving the scan period expansion coefficient K transmitted by the satellite-borne base station; The steps include determining a new SSB scan period based on the current SSB scan period and the scan period expansion coefficient K, The system is configured to perform the steps of scanning and searching for an SSB beam in a new SSB scan cycle.

[0210] As an exemplary embodiment, the processor 1000 specifically, The system is configured to perform the step of receiving a scan period expansion coefficient K transmitted by a satellite-borne base station via an SIB1 message or an RRC reconfiguration message.

[0211] As an exemplary embodiment, the processor 1000 further includes: Before establishing a connection with the satellite-borne base station, the step of determining the target SSB scan period based on a pre-set target scan period expansion factor and initial SSB scan period, The system is configured to perform the steps of scanning and searching the SSB beam at a target SSB scan period to determine the initial SSB.

[0212] As an exemplary embodiment, the target scan cycle extension factor is the maximum value among at least one preset scan cycle extension factor.

[0213] As an exemplary embodiment, the current SSB scan cycle is determined according to the SIB1 message or RRC reconfiguration message transmitted by the satellite-mounted base station.

[0214] As an exemplary embodiment, the processor 1000 is further configured to receive the paging setting parameters transmitted via the SIB1 message or RRC reconfiguration message by the satellite-mounted base station.

[0215] As an exemplary embodiment, the processor 1000 is further configured to determine the start radio frame SFN of the paging frame group where the terminal device is located using Equation 1 based on the paging setting parameters, where the paging frame of the terminal device corresponds to the k-th paging frame of the paging frame group, the position of the k-th paging frame is determined using Equation 2, and the monitoring opportunity MO of the terminal device is the physical downlink control channel PDCCH MO corresponding to the l-th SSB of the paging opportunity corresponding to the k-th paging frame.

[0216]

Number

[0217]

Number

[0218] As an exemplary embodiment, the processor 1000 further includes: Based on the paging configuration parameters, the system is configured to perform the steps of determining the starting radio frame SFN of the paging frame in which the terminal device is located using Equation 3, and the monitoring opportunity MO of the terminal device being the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space.

[0219]

number

[0220] Based on the same inventive concept, embodiments of the present disclosure provide a computer storage medium containing computer program code that, when executed on a computer, causes the computer to execute one of the aforementioned methods for extending a synchronization signal block SSB. Since the principle by which the above-described computer storage medium solves the problem is similar to that of the methods for extending a synchronization signal block SSB, embodiments of the above-described computer storage medium can refer to embodiments of the methods, and redundant content will be omitted.

[0221] In the specific implementation process, computer storage media may include various storage media capable of storing program code, such as Universal Serial Bus Flash Drives (USB), portable HDDs, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disks, or optical disks.

[0222] Based on the same inventive concept, embodiments of the present disclosure further provide a computer program product that, when executed on a computer, causes the computer to execute one of the aforementioned methods for extending a synchronization signal block SSB. Since the principle by which the above-described computer program product solves the problem is similar to that of the methods for extending a synchronization signal block SSB, implementations of the above-described computer program product can refer to implementations of the method, and redundant content will be omitted.

[0223] Computer program products may use any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exclusive list) of readable storage media include electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), eraseable programmable read-only memory (EPROM), flash memory, optical fibers, compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0224] Those skilled in the art will understand that embodiments of this application may be provided as methods, systems, or computer program products. Accordingly, this application may take the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Furthermore, this application may take the form of computer program products implemented on one or more computer-compatible storage media (including, but not limited to, disk memory and optical memory) containing computer-compatible program code.

[0225] This application will be described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of this application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a dedicated computer, an embedded processor, or other programmable data processing device to generate a machine that, from instructions executed by the processor of the computer or other programmable data processing device, generates a device that realizes the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0226] These computer program instructions may be stored in computer-readable memory that can operate a computer or other programmable data processing device in a particular way, thereby generating a product equipped with an instruction unit that implements functions specified in one or more flows of a flowchart and / or one or more blocks of a block diagram from the instructions stored in this computer-readable memory.

[0227] These computer program instructions may be loaded onto a computer or other programmable data processing device, thereby generating a process implemented on the computer by executing a series of operational steps on the computer or other programmable device, and the instructions executed on the computer or other programmable device provide steps to implement a function specified in one or more flows of a flowchart and / or one or more blocks of a block diagram.

[0228] It will be apparent to those skilled in the art that various modifications and variations can be made to this Application without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this Application and the equivalent technical scope thereto, this Application is intended to include such modifications and variations as well.

Claims

1. An extension method for a synchronization signal block SSB applied to a satellite-borne base station, If the number of beam positions to be serviced by the satellite-borne base station is greater than the number of SSB beams transmitted within each SSB period, the step is to transmit SSB beams to the current cell in K sets of SSB beams (where K is a natural number greater than 1), wherein the total number of SSB beams included in the K sets of SSB beams is greater than the number of beam positions. A step of transmitting the K SSB sets to the current cell, wherein beams of the same index in different SSB sets point to different beam positions. A method for extending the synchronous signal block SSB, including the following:

2. Each of the K SSB sets contains the same number of SSB beams. A method for extending the synchronization signal block SSB according to claim 1.

3. The further step includes transmitting the aforementioned K to a terminal device as a scan period expansion coefficient. A method for extending the synchronization signal block SSB according to claim 1.

4. The step of transmitting K as a scan period expansion coefficient to the terminal device is: The step includes transmitting K as a scan period expansion coefficient to the terminal device via a system message SIB1 or a wireless resource control RRC reconstruction message, A method for extending the synchronization signal block SSB according to claim 3.

5. If the multiplexing pattern between the SSB and the control resource set CORESET0 is set as multiplexing pattern 1, the step further includes setting the SSB scan period to 20 milliseconds or more. A method for extending the synchronization signal block SSB according to claim 1.

6. The further step includes transmitting the configured SSB scan cycle to the terminal device via an SIB1 message or an RRC reconstruction message. A method for extending the synchronization signal block SSB according to claim 5.

7. In the paging setting parameters, K paging frames are grouped into one paging frame group, each paging frame corresponds to at least one paging opportunity, the number of monitoring opportunities MO set for each paging opportunity is the same as the number of SSB beams included in one SSB set, and the step further includes a one-to-one correspondence between the monitoring opportunities MO and the SSB beams. A method for extending the synchronization signal block SSB according to claim 1.

8. In the paging setting parameters, N for each wake-up period. ｕｐｄａｔｅ A paging frame is set up, each paging frame corresponds to one paging opportunity, each paging opportunity PO contains K search spaces, the number of monitoring opportunities MO set up in each search space is the same as the number of SSB beams in one SSB set, and the x*S+M-th physical downlink control channel PDCCH MO for paging located in the k-th search space in PO further includes a step corresponding to the M-th transmitted SSB, N ｕｐｄａｔｅ＝ In N / K, N is the total number of paging frames within a pre-set wake-up period, k is the position of the SSB beam corresponding to the terminal device in the K SSB sets, X is the number of MOs mapped to one SSB, with x being a natural number between [0, X-1], and S is the number of SSB beams included in one SSB set, with M being a natural number between [1, S]. A method for extending the synchronization signal block SSB according to claim 1.

9. The further step includes transmitting the paging setting parameters to a terminal device via an SIB1 message or an RRC reconfiguration message. A method for extending a synchronization signal block SSB according to claim 7 or 8.

10. A method for extending the synchronization signal block SSB applied to terminal equipment, The steps include: establishing a connection with a satellite-borne base station, and then receiving the scan period expansion coefficient K transmitted by the satellite-borne base station; The steps include determining a new SSB scan period based on the current SSB scan period and the scan period expansion coefficient K, The steps include scanning and searching the SSB beam with the new SSB scan cycle, A method for extending the synchronous signal block SSB, including the following:

11. The step of receiving the scan period expansion coefficient K transmitted by the satellite-borne base station is: The step includes receiving the scan period expansion coefficient K transmitted by the satellite-borne base station via an SIB1 message or an RRC reconstruction message, A method for extending the synchronization signal block SSB according to claim 10.

12. Before establishing a connection with the satellite-borne base station, the steps include determining the target SSB scan period based on the target scan period expansion coefficient and the initial SSB scan period, The step of determining the initial SSB by scanning and searching the SSB beam at the target SSB scan cycle is further included. A method for extending the synchronization signal block SSB according to claim 10.

13. The target scan period expansion coefficient is the maximum value among at least one preset scan period expansion coefficient. A method for extending a synchronization signal block SSB according to claim 12.

14. The current SSB scan cycle is determined according to the SIB1 message or RRC reconstruction message transmitted by the satellite-borne base station. A method for extending the synchronization signal block SSB according to claim 10.

15. The step further includes receiving paging configuration parameters transmitted by the satellite-borne base station via an SIB1 message or an RRC reconfiguration message. A method for extending the synchronization signal block SSB according to claim 10.

16. The steps further include determining the starting wireless frame SFN of the paging frame group in which the terminal device is located using Equation 1 based on the paging setting parameters, the paging frame of the terminal device corresponds to the kth paging frame of the paging frame group, the position of the kth paging frame is determined using Equation 2, and the monitoring opportunity MO of the terminal device is the physical downlink control channel PDCCH MO corresponding to the lth SSB of the paging opportunity corresponding to the kth paging frame, [Math 1] [Math 2] T is the wake-up period of the terminal device, and N ｕｐｄａｔｅ＝ As N / K, N is the total number of paging frames within a preset wake-up period, K is the scan period expansion coefficient, k is the position of the SSB beam corresponding to the terminal device in the K SSB sets, UE_ID is the identity identifier of the terminal device, PF_offset is the offset amount of the paging frame PF, and l is the position of the SSB beam corresponding to the terminal device in the k-th SSB set. A method for extending a synchronization signal block SSB according to claim 15.

17. The steps further include determining the starting wireless frame SFN of the paging frame in which the terminal device is located using Equation 3 based on the paging setting parameters, and the monitoring opportunity MO of the terminal device being the physical downlink control channel PDCCH MO corresponding to the l-th SSB in the k-th search space, [Math 3] T is the wake-up period of the terminal device, and N ｕｐｄａｔｅ＝ N / K, where N is the total number of paging frames within a preset wake-up period, K is the scan period expansion coefficient, k is the position of the SSB beam corresponding to the terminal device in the K SSB sets, UE_ID is the identity identifier of the terminal device, PF_offset is the offset amount of the paging frame PF, and l is the position of the SSB beam corresponding to the terminal device in the k-th SSB set. A method for extending a synchronization signal block SSB according to claim 15.

18. A synchronization signal block SSB extension device, comprising a processor and a memory, wherein the memory is configured to store a program executable by the processor, and the processor is configured to read the program in the memory and perform the steps of the synchronization signal block SSB extension method described in any one of claims 1 to 17.

19. A computer storage medium storing a computer program that, when executed by a processor, implements a step of the method for extending a synchronous signal block SSB as described in any one of claims 1 to 17.

20. A computer program product comprising computer program code that, when executed on a computer, causes the computer to perform the steps of the method for extending a synchronization signal block SSB as described in any one of claims 1 to 17.

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