A system information transmission method and device, and a terminal device

Abstract

Embodiments of the present application provide a system information transmission method and device, and a terminal device. The method comprises: determining, by a terminal device, a correspondence between RMSI PDCCH occasions and SSB indexes, the RMSI PDCCH occasions being used for transmitting RMSI PDCCH; and receiving, by the terminal device, RMSI PDCCH in a first search space on a dedicated BWP based on the correspondence between the RMSI PDCCH occasions and the SSB indexes, wherein the first search space is a non-0 common search space configured on the dedicated BWP, and the RMSI PDCCH occasions are determined based on configuration information of the first search space.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a method and apparatus for transmitting system information, and a terminal device. Background Technology

[0002] Currently, if a public search space is configured on the dedicated bandwidth part (BWP), the terminal device needs to receive system information within the public search space.

[0003] A crucial piece of system information is the Remaining Minimum System Information (RMSI). RMSI specifies how to receive the Physical Downlink Control Channel (PDCCH) when the search space is a zero common search space (common search space #0), abbreviated as RMSI PDCCH. However, in scenarios where a common search space is configured on a dedicated BWP, and the RMSI search space is not a zero common search space, how to receive the RMSI PDCCH on that dedicated BWP is unclear. Summary of the Invention

[0004] This application provides a method and apparatus for transmitting system information, as well as a terminal device.

[0005] The system information transmission method provided in this application includes:

[0006] The terminal device determines the correspondence between the RMSI PDCCH timing and the synchronization signal block (SS / PBCH Block, SSB) index, wherein the RMSI PDCCH timing is used to transmit the RMSI PDCCH;

[0007] The terminal device receives the RMSI PDCCH within a first search space on the dedicated BWP based on the correspondence between the RMSI PDCCH timing and the SSB index; wherein, the first search space is a non-zero public search space configured on the dedicated BWP, and the RMSI PDCCH timing is determined based on the configuration information of the first search space.

[0008] The system information transmission device provided in this application embodiment is applied to a terminal device, and the device includes:

[0009] A determining unit is used to determine the correspondence between the RMSI PDCCH timing and the SSB index, wherein the RMSI PDCCH timing is used to transmit the RMSI PDCCH.

[0010] The receiving unit is configured to receive RMSI PDCCH within a first search space on the dedicated BWP based on the correspondence between the RMSI PDCCH timing and the SSB index; wherein the first search space is a non-zero public search space configured on the dedicated BWP, and the RMSI PDCCH timing is determined based on the configuration information of the first search space.

[0011] The terminal device provided in this application includes a processor and a memory. The memory stores computer programs, and the processor calls and runs the computer programs stored in the memory to execute the aforementioned system information transmission method.

[0012] The chip provided in this application embodiment is used to implement the above-described system information transmission method.

[0013] Specifically, the chip includes a processor for retrieving and running a computer program from memory, causing a device equipped with the chip to perform the aforementioned system information transmission method.

[0014] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described system information transmission method.

[0015] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described system information transmission method.

[0016] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described system information transmission method.

[0017] With the above technical solution, a common search space is configured on the dedicated BWP, and when the RMSI search space is a non-zero common search space, the terminal device can clearly determine the correspondence between the RMSI PDCCH timing and the SSB index. Since there is a correlation between the SSB index and the beam, the terminal device can determine the correspondence between the RMSI PDCCH timing and the beam. Based on this correspondence, the terminal device receives the RMSI PDCCH in the non-zero common search space on the dedicated BWP, ensuring that the terminal device receives the RMSI PDCCH in the correct location (i.e., through the correct beam), thus providing a guarantee for the subsequent correct reception of RMSI and obtaining the services provided by the cell. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of a communication system architecture provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of Beam sweeping provided in an embodiment of this application;

[0021] Figure 3 A schematic diagram of an SSB provided for an embodiment of this application;

[0022] Figure 4 A schematic diagram of the SSB burst set period provided in the embodiments of this application;

[0023] Figure 5 This is a flowchart illustrating the system information transmission method provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram illustrating the correspondence between the RMSI PDCCH timing index and the SSB index provided in the embodiments of this application. Figure 1 ;

[0025] Figure 7 This is a schematic diagram illustrating the correspondence between the RMSI PDCCH timing index and the SSB index provided in the embodiments of this application. Figure 2 ;

[0026] Figure 8 This is a schematic diagram illustrating the correspondence between the RMSI PDCCH timing index and the SSB index provided in the embodiments of this application. Figure 3 ;

[0027] Figure 9 This is a schematic diagram illustrating the correspondence between the RMSI PDCCH timing index and the SSB index provided in the embodiments of this application. Figure 4 ;

[0028] Figure 10 This is a schematic diagram of the structural composition of the system information transmission device provided in the embodiments of this application;

[0029] Figure 11 This is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0030] Figure 12 This is a schematic structural diagram of the chip according to an embodiment of this application;

[0031] Figure 13 This is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] The technical solutions of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, 5G communication systems, or future communication systems.

[0034] For example, the communication system 100 used in the embodiments of this application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal 120 (or a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographical area and can communicate with terminals located within that coverage area. Optionally, the network device 110 may be an evolved Node B (eNB or eNodeB) in an LTE system, or a radio controller in a Cloud Radio Access Network (CRAN), or the network device may be a mobile switching center, relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, network-side equipment in a 5G network, or network equipment in a future communication system, etc.

[0035] The communication system 100 also includes at least one terminal 120 located within the coverage area of ​​network device 110. As used herein, "terminal" includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and / or another terminal. A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communications system (PCS) terminals that can combine cellular radiotelephony with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. A terminal can refer to an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user equipment. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in future PLMNs, etc.

[0036] Optionally, the terminals 120 can communicate directly with each other via Device to Device (D2D).

[0037] Alternatively, 5G communication systems or 5G networks may also be referred to as New Radio (NR) systems or NR networks.

[0038] Figure 1 An exemplary network device and two terminals are shown. Optionally, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within its coverage area. This application embodiment does not limit this.

[0039] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0040] It should be understood that devices with communication functions in the network / system of this application embodiment can be referred to as communication devices. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal 120 with communication functions. The network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities. This application embodiment does not limit this.

[0041] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] To facilitate understanding of the technical solutions in the embodiments of this application, the technical solutions related to the embodiments of this application will be described below.

[0043] With people's pursuit of speed, latency, high-speed mobility, and energy efficiency, and the increasing diversity and complexity of business in future life, the third-generation partnership program (3GPP) is therefore being developed. rd The Generation Partnership Project (3GPP) international standards organization has begun developing 5G. The main application scenarios for 5G are: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC).

[0044] On the one hand, eMBB still aims to provide users with multimedia content, services, and data, and its demand is growing rapidly. On the other hand, because eMBB may be deployed in different scenarios, such as indoors, urban areas, and rural areas, its capabilities and needs vary considerably. Therefore, generalizations cannot be made; a detailed analysis based on the specific deployment scenario is necessary. Typical applications of URLLC include industrial automation, power automation, remote medical operations (surgery), and traffic safety assurance. Typical characteristics of mMTC include high connection density, small data volume, latency-insensitive services, low module cost, and long service life.

[0045] In the early stages of NR deployment, complete NR coverage was difficult to achieve, so typical network coverage consisted of wide-area LTE coverage and isolated NR coverage. Furthermore, a large amount of LTE deployment was below 6 GHz, leaving very little spectrum available for 5G below 6 GHz. Therefore, NR had to explore spectrum applications above 6 GHz, but high-frequency band coverage was limited and signal fading was rapid. Simultaneously, to protect mobile operators' initial investments in LTE, a tight interworking mode between LTE and NR was proposed.

[0046] NR will be deployed at high frequencies in the future. To improve coverage, 5G will introduce a beamsweeping mechanism to meet coverage requirements (trading space for coverage, and time for space), such as... Figure 2 As shown. After introducing beam sweeping, a synchronization signal needs to be transmitted in each beam direction. In 5G, the synchronization signal is given in the form of an SSB, which includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH), as follows. Figure 3 As shown, 5G synchronization signals appear periodically in the time domain in the form of synchronization signal burst sets (SS burst sets), such as... Figure 4 As shown.

[0047] The actual number of beams transmitted in each cell is determined by the network-side configuration, but the frequency of the cell determines the maximum number of beams that can be configured, as shown in Table 1 below.

[0048] Frequency range L (maximum number of beams) up to 3 (2.4) GHz 4 3(2.4) GHz—6 GHz 8 6GHz—52.6GHz 64

[0049] Table 1

[0050] In 5G, the maximum channel bandwidth can be 400MHz (called a wideband carrier), which is significantly larger than the maximum 20MHz bandwidth of LTE. If a terminal device operates solely on a wideband carrier, its power consumption will be extremely high. Therefore, it is recommended that the radio frequency (RF) bandwidth of the terminal device be adjusted based on its actual throughput. This leads to the concept of a Baseband Buffer (BWP), which aims to optimize the terminal device's power consumption. For example, if the terminal device has a low data rate, a smaller BWP can be configured; if the data rate requirement is high, a larger BWP can be configured. If the terminal device supports high data rates or operates in carrier aggregation (CA) mode, multiple BWPs can be configured.

[0051] Terminal devices in the RRC idle state or RRC inactive state reside on the initial BWP. This initial BWP is visible to terminal devices in the RRC idle state or RRC inactive state, and terminal devices can obtain system information, paging information, etc. on the initial BWP.

[0052] For terminal devices in RRC connected state, a maximum of four uplink BWPs and a maximum of four downlink BWPs can be configured for a single terminal via dedicated Radio Resource Control (RRC) signaling. However, only one uplink BWP and one downlink BWP can be active at a time. The dedicated RRC signaling can indicate the first active BWP among the configured BWPs. Furthermore, while the terminal device is in connected state, it can switch between different BWPs via Downlink Control Information (DCI). When a carrier that was inactive enters active state, the first active BWP is the one configured in the dedicated RRC signaling.

[0053] If a public search space is configured on a dedicated BWP, the terminal device needs to receive system information and paging within the public search space on that dedicated BWP.

[0054] In NR, system information includes the Master Information Block (MIB), System Information Block (SIB1), and other SIBs (Other System Information, OSI). The MIB is also called the Minimum System Information (MSI), and SIB1 is also called the RMSI. Further, the other SIBs include: SIB2, SIB3, SIB4, SIB5, SIB6, SIB7, SIB8, and SIB9. Table 2 below shows the main content carried by each system information block.

[0055]

[0056] Table 2

[0057] MIBs are transmitted on the PBCH, forming an SSB with the PSS and SSS. SIB1 (i.e., RMSI) and OSI are transmitted via the Physical Downlink Shared Channel (PDSCH) using dynamic scheduling. The search space for RMSI scheduling is generally configured through the MIB, i.e., common search space #0 (or simply search space #0). The search space for OSI scheduling is configured through SIB1; if not configured, it defaults to the same search space as RMSI, i.e., search space #0.

[0058] Because NR uses beam scanning for transmission, RMSI and OSI also use beam scanning. It should be noted that the terminal device assumes SSB and RMSI PDCCH, while OSI PDCCH is Quasi-addressable (QCL).

[0059] The RMSI PDCCH, or RMSI PDCCH for short, is configured in the MIB. The multiplexing relationship between the RMSI PDCCH and SSB includes multiplexing pattern 1, multiplexing pattern 2, and multiplexing pattern 3. Therefore, there is a one-to-one correspondence between the RMSI PDCCH timing and the SSB.

[0060] The OSI PDCCH, abbreviated as SI PDCCH, is configured in SIB1. 1) In SIB1, if `searchSpaceOtherSystemInformation` is equal to 0 or not configured, the SI PDCCH defaults to the RMSIPDCCH configuration. 2) In SIB1, if `searchSpaceOtherSystemInformation` is not equal to 0, then:

[0061] I) SI PDCCH timings are numbered consecutively from 1 within the SI window.

[0062] II) The [x*N+K]th SI PDCCH timing corresponds to the Kth actual SSB transmission; where x = 0, 1, ... X-1, K = 1, 2, ... N; X is the number of SIs repeatedly transmitted within the SI window, and N is the number of actual SSBs transmitted.

[0063] Here, the value of X satisfies the following formula: X = CEIL (total number of SI PDCCH events in the SI window / N); where CEIL is the floor function.

[0064] Currently, only the mapping relationship between the RMSI PDCCH timing and SSB is specified when the RMSI search space is common search space #0. However, it is unclear how to receive the RMSI PDCCH on a dedicated BWP when a common search space is configured on the dedicated BWP, but the RMSI search space is not common search space #0.

[0065] To address this, the following technical solutions are proposed in the embodiments of this application. The technical solutions in the embodiments of this application aim to determine the correspondence between the RMSI PDCCH timing and the SSB in a scenario where a common search space is configured on a dedicated BWP and the RMSI search space is configured as a non-zero common search space, and to receive the RMSI PDCCH based on this correspondence.

[0066] Figure 5 This is a flowchart illustrating the system information transmission method provided in the embodiments of this application, such as... Figure 5 As shown, the method for transmitting system information includes the following steps:

[0067] Step 501: The terminal device determines the correspondence between the RMSI PDCCH timing and the SSB index, wherein the RMSI PDCCH timing is used to transmit the RMSI PDCCH.

[0068] Step 502: The terminal device receives the RMSI PDCCH in the first search space on the dedicated BWP based on the correspondence between the RMSI PDCCH timing and the SSB index; wherein, the first search space is a non-zero public search space configured on the dedicated BWP, and the RMSI PDCCH timing is determined based on the configuration information of the first search space.

[0069] In this embodiment of the application, the RMSI PDCCH timing refers to the RMSI PDCCH timing, which is used to transmit RMSI PDCCH, and the RMSI PDCCH is used to schedule RMSI transmission, or in other words, the RMSI PDCCH is used to carry the scheduling information of RMSI.

[0070] It should be noted that the RMSI PDCCH timing in the embodiments of this application can also be called the RMSI PDCCH monitoring occasion.

[0071] In this embodiment, RMSI transmission uses beam sweep mode. To ensure that the terminal device correctly receives the RMSI, it needs to correctly receive the RMSI PDCCH that schedules the RMSI transmission. Therefore, it is necessary to determine the correspondence between the RMSI PDCCH timing and the SSB. Here, before determining the correspondence between the RMSI PDCCH timing and the SSB, the concept of an RMSI window is introduced.

[0072] In some optional embodiments of this application, the terminal device obtains second configuration information, which is used to determine the RMSI window.

[0073] In some optional embodiments of this application, the terminal device determines the starting SFN of the RMSI window to be an SFN that satisfies the following formula: SFN mod M = 0; where mod is the modulo operation, and M is the number of SFNs corresponding to the length of the RMSI window. As an example, the value of M is 16, and correspondingly, the length of the RMSI window is the length of 16 consecutive SFNs.

[0074] In some optional embodiments of this application, the terminal device determines that the length of the RMSI window is an integer multiple of the RMSI repetition period.

[0075] In some optional embodiments of this application, within one RMSI window, the starting boundary of the RMSI window is the starting boundary of the first RMSI repetition cycle within the RMSI window, and all RMSI repetition cycles within the RMSI window are arranged consecutively.

[0076] It should be noted that the length of the RMSI window is also known as the RMSI period. In one example, the RMSI window length is 160ms. In another example, the RMSI repetition period is 20ms.

[0077] The following sections explain how to determine the correspondence between the timing of RMSI PDCCH and SSB, categorized by situation.

[0078] Scenario 1

[0079] Within the RMSI window, the RMSI PDCCH timings are numbered starting from 0. The terminal device determines that the (k-1)th RMSI PDCCH timing index within the RMSI window corresponds to the kth actually transmitted SSB; where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered starting from 1 in ascending order of their SSB indices.

[0080] Furthermore, in the case of repeated RMSI transmissions within the RMSI window, the terminal device determines the S*n+k-1th RMSI PDCCH timing index within the RMSI window to correspond to the kth actually transmitted SSB in the (n+1th)th repeated transmission; where n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index, and N is the number of times the RMSI is repeatedly transmitted within the RMSI window.

[0081] In some alternative implementations, the value of N satisfies the following formula: N = CEIL (total number of RMSIPDCCH events in the RMSI window / S); where CEIL is the floor function. For example, if the total number of RMSI PDCCH events in the RMSI window is 12 and S is 4, then the value of N is 3.

[0082] It should be noted that the Xth RMSI PDCCH timing index corresponds to the number X. In other words, the RMSI PDCCH timing index with the number X is the Xth RMSI PDCCH timing index.

[0083] For example: refer to Figure 6The RMSI window length is 160ms, which is the length of 16 consecutive SFNs. The starting SFN of the RMSI window is an SFN that satisfies the formula SFN mod 16 = 0. The RMSI repetition period is 20ms. Within the RMSI window, the RMSIPDCCH timings are numbered sequentially starting from 0. The correspondence between the RMSI PDCCH timings and the actual transmitted SSBs is as follows: the index of the (k-1)th RMSI PDCCH timing corresponds to the kth actually transmitted SSB; the index of the S*n+k-1th RMSI PDCCH timing corresponds to the SSB actually transmitted in the (n+1)th repetition. The actual transmitted SSBs are numbered starting from 1 in ascending order of their SSB indices.

[0084] For example, if k=2, then the timing index of the first RMSI PDCCH corresponds to the SSB of the second actual transmission, or in other words, the timing index of the RMSI PDCCH numbered 1 corresponds to the SSB numbered 2.

[0085] For example, if n=1, S=4, and k=2, then the 5th RMSI PDCCH timing index corresponds to the 2nd actual transmitted SSB, or in other words, the 5th RMSI PDCCH timing index corresponds to the 2nd SSB.

[0086] Scenario 2

[0087] Within the RMSI window, the RMSI PDCCH timings are numbered starting from 1. The terminal device determines that the k-th RMSI PDCCH timing index within the RMSI repetition cycle corresponds to the k-th actually transmitted SSB; where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered starting from 1 in ascending order of their SSB indices.

[0088] Furthermore, in the case of repeated RMSI transmissions within the RMSI window, the terminal device determines the S*n+kth RMSI PDCCH timing index within the RMSI window to correspond to the kth actually transmitted SSB in the (n+1)th repeated transmission; where n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index, and N is the number of times the RMSI is repeatedly transmitted within the RMSI window.

[0089] In some alternative implementations, the value of N satisfies the following formula: N = CEIL (total number of RMSIPDCCH events in the RMSI window / S); where CEIL is the floor function. For example, if the total number of RMSI PDCCH events in the RMSI window is 12 and S is 4, then the value of N is 3.

[0090] It should be noted that the Xth RMSI PDCCH timing index corresponds to the number X. In other words, the RMSI PDCCH timing index with the number X is the Xth RMSI PDCCH timing index.

[0091] For example: refer to Figure 7 The RMSI window length is 160ms, which is the length of 16 consecutive SFNs. The starting SFN of the RMSI window is an SFN that satisfies the formula SFN mod 16 = 0. The RMSI repetition period is 20ms. Within the RMSI window, the RMSIPDCCH timings are sequentially numbered starting from 1. The correspondence between the RMSI PDCCH timings and the actual transmitted SSBs is as follows: the index of the k-th RMSI PDCCH timing corresponds to the k-th actually transmitted SSB; the index of the S*n+k-th RMSI PDCCH timing corresponds to the SSB actually transmitted in the (n+1)-th repetition. The actual transmitted SSBs are numbered starting from 1 in ascending order of their SSB indices.

[0092] For example, if k=2, then the timing index of the second RMSI PDCCH corresponds to the SSB of the second actual transmission, or in other words, the timing index of the RMSI PDCCH numbered 2 corresponds to the SSB numbered 2.

[0093] For example, if n=1, S=4, and k=2, then the 6th RMSI PDCCH timing index corresponds to the 2nd actual transmitted SSB, or in other words, the RMSI PDCCH timing index numbered 6 corresponds to the SSB numbered 2.

[0094] Scenario 3

[0095] Within each RMSI repetition period of the RMSI window, the RMSI PDCCH timings are numbered starting from 0. The terminal device determines that the (k-1)th RMSI PDCCH timing index within the RMSI repetition period corresponds to the kth actually transmitted SSB; where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered starting from 1 in ascending order of their SSB indices.

[0096] It should be noted that the Xth RMSI PDCCH timing index corresponds to the number X. In other words, the RMSI PDCCH timing index with the number X is the Xth RMSI PDCCH timing index.

[0097] For example: refer to Figure 8 The RMSI window length is 160ms, which is the length of 16 consecutive SFNs. The starting SFN of the RMSI window is an SFN that satisfies the formula SFN mod 16 = 0. The RMSI repetition period is 20ms. Within each RMSI repetition period of the RMSI window, the RMSI PDCCH timings are sequentially numbered starting from 0. Within each RMSI repetition period, the correspondence between the RMSI PDCCH timing and the actual transmitted SSB is as follows: the index of the (k-1)th RMSI PDCCH timing corresponds to the kth actually transmitted SSB, where the actually transmitted SSBs are numbered starting from 1 in ascending order of their SSB indices.

[0098] For example, if k=2, then the timing index of the second RMSI PDCCH corresponds to the SSB of the third actual transmission, or in other words, the timing index of the RMSI PDCCH numbered 2 corresponds to the SSB numbered 3.

[0099] Scenario 4

[0100] Within each RMSI repetition period of the RMSI window, the RMSI PDCCH timings are numbered starting from 1. The terminal device determines that the k-th RMSI PDCCH timing index within the RMSI repetition period corresponds to the k-th actually transmitted SSB; where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, which are numbered starting from 1 in ascending order of their SSB indices.

[0101] It should be noted that the Xth RMSI PDCCH timing index corresponds to the number X. In other words, the RMSI PDCCH timing index with the number X is the Xth RMSI PDCCH timing index.

[0102] For example: refer to Figure 9The RMSI window length is 160ms, which is the length of 16 consecutive SFNs. The starting SFN of the RMSI window is an SFN that satisfies the formula SFN mod 16 = 0. The RMSI repetition period is 20ms. Within each RMSI repetition period of the RMSI window, the RMSI PDCCH timings are sequentially numbered starting from 1. Within each RMSI repetition period, the correspondence between the RMSI PDCCH timing and the actual transmitted SSB is as follows: the index of the k-th RMSI PDCCH timing corresponds to the k-th actually transmitted SSB, where the actually transmitted SSBs are numbered starting from 1 in ascending order of their SSB indices.

[0103] For example, if k=2, then the timing index of the second RMSI PDCCH corresponds to the SSB of the second actual transmission, or in other words, the timing index of the RMSI PDCCH numbered 2 corresponds to the SSB numbered 2.

[0104] In some optional embodiments of this application, the terminal device obtains first configuration information, which is used to determine the RMSI repetition period. The first configuration information is determined based on a protocol or configured by a network device. For example, the RMSI repetition period can be 20ms.

[0105] It should be noted that the above-described scheme of "determining the correspondence between RMSI PDCCH timing and SSB index" in the embodiments of this application can also be applied to the network device side (such as the base station side), so that the network device can send RMSI PDCCH according to the correspondence.

[0106] Figure 10 This is a schematic diagram of the structural composition of the system information transmission device provided in the embodiments of this application, which is applied to terminal devices, such as... Figure 10 As shown, the system information transmission device includes:

[0107] The determining unit 1001 is used to determine the correspondence between the RMSI PDCCH timing and the SSB index, wherein the RMSI PDCCH timing is used to transmit the RMSI PDCCH.

[0108] The receiving unit 1002 is configured to receive RMSI PDCCH within a first search space on the dedicated BWP based on the correspondence between the RMSI PDCCH timing and the SSB index; wherein the first search space is a non-zero public search space configured on the dedicated BWP, and the RMSI PDCCH timing is determined based on the configuration information of the first search space.

[0109] In some optional embodiments of this application, the RMSI PDCCH timings within the RMSI window are numbered starting from 0.

[0110] In some optional embodiments of this application, the determining unit 1001 is used to determine the k-th actual transmitted SSB corresponding to the (k-1)th RMSI PDCCH timing index within the RMSI window;

[0111] Where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index.

[0112] In some optional embodiments of this application, the determining unit 1001 is used to determine the SSB of the kth actual transmission corresponding to the (n+1)th repeated transmission in the RMSI window for the S*n+k-1th RMSI PDCCH timing index.

[0113] Where n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index; N is the number of times the RMSI is repeatedly transmitted within the RMSI window.

[0114] In some alternative embodiments of this application, the RMSI PDCCH timings within the RMSI window are numbered starting from 1.

[0115] In some optional embodiments of this application, the determining unit 1001 is used to determine the kth actual transmitted SSB corresponding to the kth RMSI PDCCH timing index within the RMSI window;

[0116] Where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index.

[0117] In some optional embodiments of this application, the determining unit 1001 is used to determine the SSB of the kth actual transmission corresponding to the (n+1)th repeated transmission of the S*n+kth RMSI PDCCH timing index within the RMSI window;

[0118] Where n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index; N is the number of times the RMSI is repeatedly transmitted within the RMSI window.

[0119] In some optional embodiments of this application, the value of N satisfies the following formula:

[0120] N = CEIL(total number of RMSI PDCCH opportunities in the RMSI window / S); where CEIL is the floor function.

[0121] In some alternative embodiments of this application, the RMSIPDCCH timing is numbered starting from 0 within each RMSI repetition cycle in the RMSI window.

[0122] In some optional embodiments of this application, the determining unit 1001 is used to determine the k-th actual transmitted SSB corresponding to the (k-1)th RMSI PDCCH timing index within the RMSI repetition cycle;

[0123] Where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index.

[0124] In some alternative embodiments of this application, the RMSIPDCCH timing is numbered starting from 1 within each RMSI repetition cycle in the RMSI window.

[0125] In some optional embodiments of this application, the determining unit 1001 is used to determine the kth actual transmitted SSB corresponding to the kth RMSI PDCCH timing index within the RMSI repetition cycle;

[0126] Where k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of SSBs actually transmitted, and the SSBs actually transmitted are numbered starting from 1 in ascending order of SSB index.

[0127] In some optional embodiments of this application, the apparatus further includes:

[0128] An acquisition unit is configured to acquire first configuration information, which is used to determine the RMSI repetition period, wherein the first configuration information is determined based on a protocol or configured through a network device.

[0129] In some optional embodiments of this application, the apparatus further includes:

[0130] The acquisition unit is used to acquire second configuration information, which is used to determine the RMSI window.

[0131] In some optional embodiments of this application, the determining unit 1001 is further configured to determine the starting SFN of the RMSI window as an SFN that satisfies the following formula:

[0132] SFN mod M = 0; where mod is the modulo operation and M is the number of SFNs corresponding to the length of the RMSI window.

[0133] In some optional embodiments of this application, the value of M is 16, and correspondingly, the length of the RMSI window is the length of 16 consecutive SFNs.

[0134] In some optional embodiments of this application, the determining unit 1001 is further configured to determine that the length of the RMSI window is an integer multiple of the RMSI repetition period.

[0135] In some optional embodiments of this application, within one RMSI window, the starting boundary of the RMSI window is the starting boundary of the first RMSI repetition cycle within the RMSI window, and all RMSI repetition cycles within the RMSI window are arranged consecutively.

[0136] Those skilled in the art should understand that the description of the system information transmission device in the embodiments of this application can be understood with reference to the description of the system information transmission method in the embodiments of this application.

[0137] Figure 11 This is a schematic structural diagram of a communication device 1100 provided in an embodiment of this application. This communication device can be a terminal device or a network device. Figure 11 The communication device 1100 shown includes a processor 1110, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0138] Optionally, such as Figure 11 As shown, the communication device 1100 may further include a memory 1120. The processor 1110 can retrieve and run computer programs from the memory 1120 to implement the methods described in this embodiment.

[0139] The memory 1120 can be a separate device independent of the processor 1110, or it can be integrated into the processor 1110.

[0140] Optionally, such as Figure 11 As shown, the communication device 1100 may also include a transceiver 1130. The processor 1110 can control the transceiver 1130 to communicate with other devices. Specifically, it can send information or data to other devices or receive information or data sent by other devices.

[0141] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of antennas may be one or more.

[0142] Optionally, the communication device 1100 may specifically be a network device in the embodiments of this application, and the communication device 1100 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0143] Optionally, the communication device 1100 may specifically be a mobile terminal / terminal device in the embodiments of this application, and the communication device 1100 may implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0144] Figure 12 This is a schematic structural diagram of the chip according to an embodiment of this application. Figure 12 The chip 1200 shown includes a processor 1210, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0145] Optionally, such as Figure 12 As shown, chip 1200 may further include memory 1220. Processor 1210 can retrieve and run computer programs from memory 1220 to implement the methods described in this embodiment.

[0146] The memory 1220 can be a separate device independent of the processor 1210, or it can be integrated into the processor 1210.

[0147] Optionally, the chip 1200 may also include an input interface 1230. The processor 1210 can control the input interface 1230 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

[0148] Optionally, the chip 1200 may also include an output interface 1240. The processor 1210 can control the output interface 1240 to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

[0149] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0150] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0151] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0152] Figure 13 This is a schematic block diagram of a communication system 1300 provided in an embodiment of this application. Figure 13 As shown, the communication system 1300 includes a terminal device 1310 and a network device 1320.

[0153] The terminal device 1310 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1320 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, these will not be elaborated here.

[0154] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be 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 devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0155] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0156] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0157] This application also provides a computer-readable storage medium for storing computer programs.

[0158] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0159] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0160] This application also provides a computer program product, including computer program instructions.

[0161] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0162] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0163] This application also provides a computer program.

[0164] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0165] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of this application. When the computer program is run on a computer, it causes the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0166] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0167] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0168] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0169] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0170] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0171] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A method for transmitting system information, the method comprising: determining, by a terminal device, a correspondence between a remaining minimum system information (RMSI) physical downlink control channel (PDCCH) occasion and a synchronization signal block (SSB) index, the RMSI PDCCH occasion being used for transmitting a RMSI PDCCH; receiving, by the terminal device, a RMSI PDCCH in a first search space on a dedicated bandwidth part (BWP) based on the correspondence between the RMSI PDCCH occasion and the SSB index, wherein the first search space is a non-0 common search space configured on the dedicated BWP, and the RMSI PDCCH occasion is determined based on configuration information of the first search space.

2. The method of claim 1, wherein, The RMSI PDCCH occasion is numbered from 0 within a RMSI window.

3. The method of claim 2, wherein, The determining, by the terminal device, the correspondence between the RMSI PDCCH occasion and the SSB index comprises: determining, by the terminal device, that a (k-1)th RMSI PDCCH occasion index within the RMSI window corresponds to a kth actually transmitted SSB, wherein k is a positive integer greater than or equal to 1 and less than or equal to S, and S is a number of actually transmitted SSBs, the actually transmitted SSBs being numbered from 1 in ascending order of SSB index. The determining, by the terminal device, the correspondence between the RMSI PDCCH occasion and the SSB index comprises:

4. The method of claim 2 or 3, wherein, determining, by the terminal device, that an (S*n+k-1)th RMSI PDCCH occasion index within the RMSI window corresponds to a kth actually transmitted SSB in an (n+1)th repeated transmission, wherein n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S, S is a number of actually transmitted SSBs, the actually transmitted SSBs being numbered from 1 in ascending order of SSB index, and N is a number of repeated transmissions of RMSI within the RMSI window. The RMSI PDCCH occasion is numbered from 1 within a RMSI window. The determining, by the terminal device, the correspondence between the RMSI PDCCH occasion and the SSB index comprises:

5. The method of claim 1, wherein, determining, by the terminal device, that a kth RMSI PDCCH occasion index within the RMSI window corresponds to a kth actually transmitted SSB, wherein k is a positive integer greater than or equal to 1 and less than or equal to S, and S is a number of actually transmitted SSBs, the actually transmitted SSBs being numbered from 1 in ascending order of SSB index.

6. The method of claim 5, wherein, The determining, by the terminal device, the correspondence between the RMSI PDCCH occasion and the SSB index comprises: determining, by the terminal device, that an (S*n+k)th RMSI PDCCH occasion index within the RMSI window corresponds to a kth actually transmitted SSB in an (n+1)th repeated transmission, wherein n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S, S is a number of actually transmitted SSBs, the actually transmitted SSBs being numbered from 1 in ascending order of SSB index, and N is a number of repeated transmissions of RMSI within the RMSI window. ​ 7. The method of claim 5 or 6, wherein, ​ ​ ​ 8. The method of claim 4 or 7, wherein, The value of N satisfies the following formula: N = CEIL (total number of RMSI PDCCH occasions within the RMSI window / S); wherein CEIL is a rounding up operation.

9. The method of claim 1, wherein, In each RMSI repetition period within the RMSI window, the RMSI PDCCH occasions are numbered from 0.

10. The method of claim 9, wherein, The terminal device determines the correspondence between the RMSI PDCCH occasions and the SSB indexes, including: The terminal device determines that the k-1th RMSI PDCCH occasion index within the RMSI repetition period corresponds to the kth actually transmitted SSB; wherein k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, and the actually transmitted SSBs are numbered from 1 in ascending order of SSB index.

11. The method of claim 1, wherein, In each RMSI repetition period within the RMSI window, the RMSI PDCCH occasions are numbered from 1.

12. The method of claim 11, wherein, The terminal device determines the correspondence between the RMSI PDCCH occasions and the SSB indexes, including: The terminal device determines that the kth RMSI PDCCH occasion index within the RMSI repetition period corresponds to the kth actually transmitted SSB; wherein k is a positive integer greater than or equal to 1 and less than or equal to S; S is the number of actually transmitted SSBs, and the actually transmitted SSBs are numbered from 1 in ascending order of SSB index.

13. The method of any one of claims 9 to 12, wherein, The method further includes: The terminal device acquires first configuration information, and the first configuration information is used to determine the RMSI repetition period, wherein the first configuration information is determined based on a protocol or configured by a network device.

14. The method of any one of claims 2 to 13, wherein, The method further includes: The terminal device acquires second configuration information, and the second configuration information is used to determine the RMSI window.

15. The method of any one of claims 2 to 14, wherein, The method further includes: The terminal device determines that the starting SFN of the RMSI window is an SFN satisfying the following formula: SFN mod M = 0; wherein mod is a modulo operation, and M is the number of SFNs corresponding to the length of the RMSI window.

16. The method of claim 15, wherein, The value of M is 16, and accordingly, the length of the RMSI window is the length of 16 consecutive SFNs.

17. The method of any one of claims 2 to 16, wherein, The method further includes: The terminal device determines that the length of the RMSI window is an integer multiple of the RMSI repetition period.

18. The method of claim 17, wherein, In one RMSI window, the starting boundary of the RMSI window is the starting boundary of the first RMSI repetition period within the RMSI window, and all RMSI repetition periods within the RMSI window are arranged continuously.

19. A system information transmission apparatus applied to a terminal device, the apparatus comprising: a determination unit configured to determine the correspondence between RMSI PDCCH occasions and SSB indexes, the RMSI PDCCH occasions being used to transmit RMSI PDCCHs; The receiving unit is configured to receive an RMSI PDCCH in a first search space on a dedicated BWP based on a correspondence between the RMSI PDCCH occasion and the SSB index; wherein the first search space is a non-0 common search space configured on the dedicated BWP, and the RMSI PDCCH occasion is determined based on configuration information of the first search space.

20. The apparatus of claim 19, wherein, In the RMSI window, the RMSI PDCCH occasion is numbered from 0.

21. The apparatus of claim 20, wherein, The determining unit is configured to determine that an (k-1)-th RMSI PDCCH occasion index in the RMSI window corresponds to an (k)-th actually transmitted SSB. wherein k is a positive integer greater than or equal to 1 and less than or equal to S, and S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index.

22. The apparatus of claim 20 or 21, wherein, The determining unit is configured to determine that an (S*n+k-1)-th RMSI PDCCH occasion index in the RMSI window corresponds to an (k)-th actually transmitted SSB in the (n+1)-th repeated transmission. wherein n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S, S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index, and N is the number of repeated transmissions of RMSI in the RMSI window.

23. The apparatus of claim 19, wherein, In the RMSI window, the RMSI PDCCH occasion is numbered from 1.

24. The apparatus of claim 23, wherein, The determining unit is configured to determine that an (k)-th RMSI PDCCH occasion index in the RMSI window corresponds to an (k)-th actually transmitted SSB. wherein k is a positive integer greater than or equal to 1 and less than or equal to S, and S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index.

25. The apparatus of claim 23 or 24, wherein, The determining unit is configured to determine that an (S*n+k)-th RMSI PDCCH occasion index in the RMSI window corresponds to an (k)-th actually transmitted SSB in the (n+1)-th repeated transmission. wherein n is a positive integer greater than or equal to 0 and less than or equal to N-1, k is a positive integer greater than or equal to 1 and less than or equal to S, S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index, and N is the number of repeated transmissions of RMSI in the RMSI window.

26. The apparatus of claim 22 or 25, wherein, The value of N satisfies the following formula: N = CEIL (total number of RMSI PDCCH occasions in the RMSI window / S); wherein CEIL is a rounding-up operation.

27. The apparatus of claim 19, wherein, In each RMSI repetition period in the RMSI window, the RMSI PDCCH occasion is numbered from 0.

28. The apparatus of claim 27, wherein, The determining unit is configured to determine that an (k-1)-th RMSI PDCCH occasion index in the RMSI repetition period corresponds to an (k)-th actually transmitted SSB. wherein k is a positive integer greater than or equal to 1 and less than or equal to S, and S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index.

29. The apparatus of claim 19, wherein, The RMSI PDCCH occasion is numbered from 1 in each RMSI repetition period within the RMSI window.

30. The apparatus of claim 29, wherein, The determining unit is configured to determine that the kth RMSI PDCCH occasion index in the RMSI repetition period corresponds to the kth actually transmitted SSB. wherein k is a positive integer greater than or equal to 1 and less than or equal to S; and S is the number of actually transmitted SSBs, which are numbered from 1 in ascending order of SSB index.

31. The apparatus of any one of claims 27-30, wherein, The apparatus further includes: The obtaining unit is configured to obtain first configuration information used to determine the RMSI repetition period, wherein the first configuration information is determined based on a protocol or configured by a network device.

32. The apparatus of any one of claims 20-31, wherein, The apparatus further includes: The obtaining unit is configured to obtain second configuration information used to determine the RMSI window.

33. The apparatus of any one of claims 20-32, wherein, The determining unit is further configured to determine that the starting SFN of the RMSI window is an SFN satisfying the following formula: SFN mod M = 0; wherein mod is a modulo operation, and M is the number of SFNs corresponding to the length of the RMSI window.

34. The apparatus of claim 33, wherein, The value of M is 16, and accordingly, the length of the RMSI window is the length of 16 consecutive SFNs.

35. The apparatus of any one of claims 20-34, wherein, The determining unit is further configured to determine that the length of the RMSI window is an integer multiple of the RMSI repetition period.

36. The apparatus of claim 35, wherein, In one RMSI window, the starting boundary of the RMSI window is the starting boundary of the first RMSI repetition period in the RMSI window, and all RMSI repetition periods in the RMSI window are arranged consecutively.

37. A terminal device comprising: A processor and a memory, the memory being configured to store a computer program, and the processor being configured to invoke and run the computer program stored in the memory to execute the method according to any one of claims 1 to 18.

38. A chip comprising: A processor configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 18. 39.A computer readable storage medium configured to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 18.

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