Synchronization signal block receiving method, transmission method, device, medium, and product

Abstract

The present invention discloses a method, an apparatus, a medium and a product for receiving and transmitting synchronization signal blocks, which belong to the field of communications. The method includes receiving synchronization signal blocks in at least two rasters. The method can obtain complete synchronization information through at least two synchronization signal blocks on at least two rasters.

Description

[Technical Field]

[0001] The present invention relates to the field of communications, and in particular to a method, apparatus, medium and product for receiving and transmitting synchronization signal blocks. [Background technology]

[0002] The 5G Release 18 (Rel-18) Work Item Description (WID) approved projects supporting new radio (NR) with bandwidths below 5 MHz.

[0003] During the initial access phase of a user device (UE), the UE searches for a synchronization signal block (SSB) in the system bandwidth, and the frequency domain resource occupied by the SSB for initial access is 20 resource blocks (RB). Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present invention provide a synchronization signal block receiving method, a synchronization signal block transmitting method, a synchronization signal block transmitting medium, and a synchronization signal block transmitting product. [Means for solving the problem]

[0005] According to one aspect of an embodiment of the present invention, there is provided a method for receiving a synchronization signal block, performed by a user device, the method comprising: The method includes receiving synchronization signal blocks in at least two rasters.

[0006] According to another aspect of an embodiment of the present invention, there is provided a method for transmitting a synchronization signal block performed by a network device, the method comprising: The method includes transmitting synchronization signal blocks in at least two rasters.

[0007] According to another aspect of an embodiment of the present invention, there is provided an apparatus for receiving a synchronization signal block, the apparatus comprising: A receiving module configured to receive synchronization signal blocks in at least two rasters is provided.

[0008] According to another aspect of an embodiment of the present invention, there is provided an apparatus for transmitting a synchronization signal block, the apparatus comprising: A transmitting module configured to transmit synchronization signal blocks in at least two rasters is provided.

[0009] According to another aspect of an embodiment of the present invention, there is provided a user device, the user device comprising: a processor and a transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the synchronization signal block reception method described in each of the above aspects.

[0010] According to another aspect of an embodiment of the present invention, there is provided a network device, the network device comprising: a processor and a transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the synchronization signal block transmission method described in each of the above aspects.

[0011] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one instruction, at least one section of a program, a code set or an instruction set, the at least one instruction, the at least one section of a program, the code set or the instruction set being loaded and executed by a processor to implement the method for receiving a synchronization signal block described in each of the above aspects or the method for transmitting a synchronization signal block described in each of the above aspects.

[0012] According to another aspect of an embodiment of the present invention, a computer program product (or computer program) is provided, the computer program product (or computer program) including computer instructions stored on a computer-readable storage medium, a processor of a computer device reading the computer instructions from the computer-readable storage medium, and the processor executing the computer instructions, causing the computer device to perform the method for receiving a synchronization signal block described in each of the above aspects or the method for transmitting a synchronization signal block described in each of the above aspects.

[0013] According to another aspect of an embodiment of the present invention, there is provided a communication system comprising a user device and a network device, wherein the user device is used to perform the synchronization signal block reception method described in each of the above aspects, and the network device is used to perform the synchronization signal block transmission method described in each of the above aspects.

[0014] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects.

[0015] In the above synchronization signal block receiving method, the user device receives the synchronization signal block in at least two rasters, and receiving the synchronization signal block in multiple rasters ensures that the user device can obtain the complete synchronization signal block. It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. [Brief explanation of the drawings]

[0016] In order to more clearly describe the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments are briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a block diagram of a communication system according to an example embodiment; [Figure 2] 4 is a flowchart of a method for receiving a synchronization signal block according to an example embodiment. [Figure 3] FIG. 10 is a schematic diagram of a raster group according to an example embodiment. [Figure 4] FIG. 10 is a schematic diagram of a raster group according to another example embodiment. [Figure 5] 4 is a flowchart of a method for transmitting a synchronization signal block according to an example embodiment; [Figure 6] FIG. 10 is a schematic diagram of a synchronization signal block group according to an exemplary embodiment. [Figure 7] FIG. 2 is a block diagram of a receiving device for a synchronization signal block according to an exemplary embodiment. [Figure 8] 1 is a block diagram of a transmitter of a synchronization signal block according to an exemplary embodiment; [Figure 9] 1 is a schematic diagram of the structure of a terminal according to an exemplary embodiment; [Figure 10] FIG. 2 is a schematic diagram of the structure of an access network device according to an example embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Illustrative examples are described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, like numbers in different drawings refer to the same or similar elements unless otherwise indicated. The embodiments described in the following illustrative examples do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention as detailed in the appended claims.

[0018] In 5G Rel-18 Wide Indicator (WID), projects supporting NR with bandwidths less than 5 MHz were approved. This bandwidth is preferably 3 MHz or 3.6 MHz. Based on a 15-kHz subcarrier spacing (SCS), the number of available RBs in the entire system bandwidth of a communication system does not exceed 20 RBs. However, the frequency domain resources occupied by the SSBs for initial access are 20 RBs. If the time-frequency domain mapping of the SSBs is not optimized, the system frequency domain resources will be insufficient, causing the SSBs to exceed the system bandwidth. As a result, initial access performance will be severely affected. Since punching of the Physical Broadcast Channel (PBCH) is not restricted in Rel-18 Wide Indicator (WID), the PBCH will be particularly severely affected.

[0019] Therefore, the present application provides a method for transmitting and receiving synchronization signal blocks, which can transmit and receive multiple synchronization signal blocks carrying the same information, and combine these synchronization signal blocks at the receiving end to improve decoding performance. Furthermore, for multiple synchronization signal blocks that are received consecutively, the missing parts are always fixed, reducing the gain of combining and decoding. A reasonable raster design ensures that the information of the synchronization signal blocks that are received consecutively is complete, making the performance of initial access more reliable.

[0020] 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present invention, which may include an access network 12 and a user device 14.

[0021] The access network 12 includes several network devices 120. The network devices (also referred to as access network devices) 120 may be base stations, which are devices deployed in an access network to provide wireless communication functions to user devices (called "terminals") 14. Base stations may include various types of macro base stations, micro base stations, relay stations, access points, etc. In systems using different radio access technologies, devices having base station functions may be called by different names. For example, in an LTE (Long Term Evolution) system, they are called eNodeBs or eNBs, and in a 5G NR system, they are called gNodeBs or gNBs. As communication technologies evolve, the term "base station" may also change. For convenience of explanation in embodiments of the present invention, the above-mentioned devices providing wireless communication functions to user devices 14 will be collectively referred to as network devices.

[0022] The user devices 14 may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to wireless modems that have wireless communication capabilities, as well as various forms of user devices, mobile stations (MS), terminal devices, etc. For ease of explanation, the above devices will be collectively referred to as user devices. The network devices 120 and the user devices 14 communicate with each other over some air interface technology, such as the Uu interface.

[0023] For example, there are two communication scenarios between the network device 120 and the user device 14: an uplink communication scenario and a downlink communication scenario. Among these, the uplink communication refers to transmitting signals to the network device 120, and the downlink communication refers to transmitting signals to the user device 14.

[0024] The technical solutions of the embodiments of the present invention are applicable to a Global System of Mobile Communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an Advanced Long Term Evolution (LTE-A) system, a New Radio (NR) system, an evolution of the NR system, an LTE-based access to Unlicensed spectrum (LTE-U) system, an NR-U system, a Universal Mobile Telecommunication System (UMTS), a Worldwide Interoperability for Microwave Access (WIM) system, a LTE-based access to Unlicensed spectrum (LTE-U) system, a NR-U system, a Universal Mobile Telecommunication System (UMTS), a LTE-based access to Unlicensed spectrum (LTE-U ... The present invention can be applied to various communication systems such as WiMAX (Wireless Access) communication systems, Wireless Local Area Networks (WLAN), WiFi (Wireless Fidelity), next generation communication systems, or other communication systems.

[0025] Generally, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technologies, mobile communication systems not only support traditional communication, but also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, and vehicle-to-everything (V2X) systems. The embodiments of the present application may be applied to these communication systems.

[0026] FIG. 2 shows a flowchart of a synchronization signal block receiving method provided by an exemplary embodiment of the present invention, which is applied to a user device of the communication system shown in FIG. 1, and includes the following steps:

[0027] In step 210, synchronization signal blocks are received in at least two rasters. The at least two rasters belong to the same raster group, and the raster group includes at least one raster pair, the raster pair including a first raster and a second raster. Alternatively, each raster group includes at least two raster subgroups, the at least two rasters belonging to the same raster subgroup, each raster subgroup includes at least one raster pair, and each raster pair includes a first raster and a second raster.

[0028] Optionally, the first raster and second raster are separated by a first frequency domain unit width.

[0029] Illustratively, the first frequency domain unit width is defined by a protocol or pre-configured by a network device for the user device.

[0030] For example, a raster group or raster subgroup may contain at least two raster pairs, and each raster in each raster pair may be different, or one raster may be the same in each raster pair. For example, a raster group / raster subgroup may contain rasters 1 to 3, with rasters 1 and 2 forming a raster pair, and rasters 2 and 3 also forming a raster pair. As another example, a raster group / raster subgroup may contain rasters 4 to 7, with rasters 4 and 5 forming a raster pair, and rasters 6 and 7 forming a raster pair. As shown in FIG. 3, rasters 1 and 2 form a raster pair, with the low-frequency edge of raster 1 and the high-frequency edge of raster 2 separated by a first frequency domain unit width.

[0031] For example, the distance between rasters may be the distance between the center frequency points of the rasters or the distance between the edges of the rasters, including the distance between the edges of the two rasters approaching each other in the frequency domain.

[0032] Optionally, the first raster is separated from a first edge of a system bandwidth of the communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width.

[0033] Here, the first edge is an edge in a first frequency domain direction of the system bandwidth, and the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions, e.g., the first frequency domain direction is a high frequency direction and the second frequency domain direction is a low frequency direction, or the first frequency domain direction is a low frequency direction and the second frequency domain direction is a high frequency direction.

[0034] For example, a raster group contains at least two raster pairs, and each raster between different raster pairs may be different, or one raster between different raster pairs may be the same.

[0035] Alternatively, each raster group includes a first raster subgroup and a second raster subgroup, where the first raster subgroup includes M first rasters, and the second raster subgroup includes M second rasters, and the M first rasters and the M second rasters correspond one-to-one, that is, the M first rasters and the M second rasters form M raster pairs, where the first raster is separated from the first edge in the high-frequency direction of the system bandwidth by a second frequency-domain unit width, and the second raster is separated from the second edge in the low-frequency direction of the system bandwidth by a third frequency-domain unit width. For example, as shown in FIG. 4, a first raster subgroup includes rasters M11 and M12, a second raster subgroup includes rasters M21 and M22, rasters M11 and M21 are a raster pair, and rasters M12 and M22 are a raster pair, the rasters in the first raster subgroup are separated from the system bandwidth by a second frequency domain unit width, and the rasters in the second raster subgroup are separated from the system bandwidth by a third frequency domain unit width.

[0036] Illustratively, the second frequency domain unit width and the third frequency domain unit width are defined by a protocol or pre-configured by a network device for a user device, and the second frequency domain unit width and the third frequency domain unit width may be the same or different.

[0037] Illustratively, the first raster and the second raster may be separated by a first frequency domain unit width, which may be the same as or different from the second and third frequency domain unit widths.

[0038] Illustratively, the first raster is near the high-frequency edge of the system bandwidth and the second raster is near the low-frequency edge of the system bandwidth, or alternatively, the first raster is near the low-frequency edge of the system bandwidth and the second raster is near the high-frequency edge of the system bandwidth.

[0039] For example, the distance between the raster and the system bandwidth may be the distance between the center frequency point of the raster and the edge of the system bandwidth, or the distance between the edge of the raster and the edge of the system bandwidth.

[0040] Illustratively, the sum of the frequency domain unit width occupied by the two SSBs and the first frequency domain unit width is equal to or greater than the system bandwidth.

[0041] Illustratively, the sum of the frequency domain unit width occupied by the two rasters and the first frequency domain unit width is equal to or greater than the system bandwidth.

[0042] For example, the first raster is closer to the high-frequency edge of the system bandwidth, and the position of the high-frequency edge of the first raster in the frequency domain is larger than the position of the high-frequency edge of the system bandwidth; the second raster is closer to the low-frequency edge of the system bandwidth, and the position of the low-frequency edge of the second raster in the frequency domain is smaller than the position of the low-frequency edge of the system bandwidth; or the second raster is closer to the high-frequency edge of the system bandwidth, and the position of the high-frequency edge of the second raster in the frequency domain is larger than the position of the high-frequency edge of the system bandwidth; and the first raster is closer to the low-frequency edge of the system bandwidth, and the position of the low-frequency edge of the first raster in the frequency domain is smaller than the position of the low-frequency edge of the system bandwidth.

[0043] The at least two rasters receiving the synchronization signal block belong to the same raster group, and the raster group can be directly set as a raster pair within the raster group without being divided into subgroups, and the user device receives the synchronization signal block from at least two rasters within the same raster group. Alternatively, the raster group is divided into subgroups, and a raster pair is set within a raster subgroup, and the user device receives the synchronization signal block from at least two rasters within the same raster subgroup.

[0044] After obtaining the synchronization signal blocks on each raster in at least one raster pair, the synchronization signal blocks belonging to the same raster pair are combined to obtain a combined synchronization signal block, and the combined synchronization signal block is used to analyze the complete synchronization information.

[0045] For example, the at least two rasters include a first raster and a second raster, and the user device receives a first synchronization signal block in the first raster and a second synchronization signal block in the second raster, and obtains synchronization information based on the first synchronization signal block and the second synchronization signal block, where the information carried by the first synchronization signal block and the second synchronization signal block is the same. Illustratively, the user device combines the first synchronization signal block and the second synchronization signal block to obtain the combined synchronization signal block, and analyzes the combined synchronization signal block to obtain complete synchronization information. The synchronization information carried by the first synchronization signal block and the second synchronization signal block is the same.

[0046] When the first raster and the second raster in the raster pair are separated by a first frequency domain unit width, the user device determines a first frequency domain location of the first synchronization signal block, then determines a second frequency domain location offset from the first frequency domain location in the first frequency domain direction by the first frequency domain unit width, and detects the second synchronization signal block from the second frequency domain location along the low frequency to high frequency direction or the high frequency to low frequency direction.

[0047] A synchronization signal group corresponding to the raster group is also defined, where the same raster group is used to transmit at least two synchronization signal blocks, each raster in the raster group is used to transmit one synchronization signal block, and the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, where the same synchronization signal block group includes at least two synchronization signal blocks, and the synchronization information carried by the at least two synchronization signal blocks is the same.

[0048] Optionally, the raster is a synchronous raster or a channel raster.

[0049] Illustratively, the system bandwidth includes at least one of the system bandwidth of an LTE system and the system bandwidth of an NR system.

[0050] Optionally, the system bandwidth is less than 5 MHz, for example, the system bandwidth is 3 MHz or 3.6 MHz.

[0051] Optionally, the system bandwidth is less than 20 MHz, for example, the system bandwidth is 5 MHz, 8 MHz, or 10 MHz.

[0052] In summary, according to the synchronization signal block receiving method provided in this embodiment, the user device receives at least two synchronization signal blocks carrying the same synchronization information in at least two rasters, so that the user device can obtain complete synchronization information through at least two synchronization signals, thereby avoiding incomplete information due to insufficient bandwidth and also avoiding information loss during transmission.

[0053] 5 shows a flowchart of a synchronization signal block transmission method provided by an exemplary embodiment of the present invention, which is applied to the network devices of the communication system shown in FIG. 1. The method includes the following steps:

[0054] In step 310, a synchronization signal block is transmitted in at least two rasters.

[0055] The at least two rasters belong to the same raster group, and the raster group includes at least one raster pair, the raster pair including a first raster and a second raster.

[0056] Alternatively, each raster group includes at least two raster subgroups, the at least two rasters belonging to the same raster subgroup, each raster subgroup includes at least one raster pair, and each raster pair includes a first raster and a second raster.

[0057] Optionally, the first raster and second raster are separated by a first frequency domain unit width.

[0058] Illustratively, the first frequency domain unit width is defined by a protocol or pre-configured by a network device for the user device.

[0059] For example, a raster group or raster subgroup may contain at least two raster pairs, and each raster in each raster pair may be different, or one raster may be the same in each raster pair. For example, a raster group / raster subgroup may contain rasters 1 to 3, with rasters 1 and 2 forming a raster pair, and rasters 2 and 3 also forming a raster pair. As another example, a raster group / raster subgroup may contain rasters 4 to 7, with rasters 4 and 5 forming a raster pair, and rasters 6 and 7 forming a raster pair. As shown in FIG. 3, rasters 1 and 2 form a raster pair, with the low-frequency edge of raster 1 and the high-frequency edge of raster 2 separated by a first frequency domain unit width.

[0060] For example, the distance between rasters may be the distance between the center frequency points of the rasters or the distance between the edges of the rasters, including the distance between the edges of the two rasters approaching each other in the frequency domain.

[0061] Optionally, the first raster is separated from a first edge of a system bandwidth of the communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width.

[0062] Here, the first edge is an edge in a first frequency domain direction of the system bandwidth, and the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions, e.g., the first frequency domain direction is a high frequency direction and the second frequency domain direction is a low frequency direction, or the first frequency domain direction is a low frequency direction and the second frequency domain direction is a high frequency direction.

[0063] For example, a raster group contains at least two raster pairs, and each raster between different raster pairs may be different, or one raster between different raster pairs may be the same.

[0064] Alternatively, each raster group includes a first raster subgroup and a second raster subgroup, where the first raster subgroup includes M first rasters, and the second raster subgroup includes M second rasters, and the M first rasters and the M second rasters correspond one-to-one, that is, the M first rasters and the M second rasters form M raster pairs, where the first raster is separated from the first edge in the high-frequency direction of the system bandwidth by a second frequency-domain unit width, and the second raster is separated from the second edge in the low-frequency direction of the system bandwidth by a third frequency-domain unit width. For example, as shown in FIG. 4, a first raster subgroup includes rasters M11 and M12, a second raster subgroup includes rasters M21 and M22, rasters M11 and M21 are a raster pair, and rasters M12 and M22 are a raster pair, the rasters in the first raster subgroup are separated from the system bandwidth by a second frequency domain unit width, and the rasters in the second raster subgroup are separated from the system bandwidth by a third frequency domain unit width.

[0065] Illustratively, the second frequency domain unit width and the third frequency domain unit width are defined by a protocol or pre-configured by a network device for a user device, and the second frequency domain unit width and the third frequency domain unit width may be the same or different.

[0066] Illustratively, the first raster and the second raster may be separated by a first frequency domain unit width, which may be the same as or different from the second and third frequency domain unit widths.

[0067] Illustratively, the first raster is near the high-frequency edge of the system bandwidth and the second raster is near the low-frequency edge of the system bandwidth, or alternatively, the first raster is near the low-frequency edge of the system bandwidth and the second raster is near the high-frequency edge of the system bandwidth.

[0068] For example, the distance between the raster and the system bandwidth may be the distance between the center frequency point of the raster and the edge of the system bandwidth, or the distance between the edge of the raster and the edge of the system bandwidth.

[0069] Illustratively, the sum of the frequency domain unit width occupied by the two SSBs and the first frequency domain unit width is equal to or greater than the system bandwidth.

[0070] Illustratively, the sum of the frequency domain unit width occupied by the two rasters and the first frequency domain unit width is equal to or greater than the system bandwidth.

[0071] For example, the first raster is closer to the high-frequency edge of the system bandwidth, and the position of the high-frequency edge of the first raster in the frequency domain is larger than the position of the high-frequency edge of the system bandwidth; the second raster is closer to the low-frequency edge of the system bandwidth, and the position of the low-frequency edge of the second raster in the frequency domain is smaller than the position of the low-frequency edge of the system bandwidth; or the second raster is closer to the high-frequency edge of the system bandwidth, and the position of the high-frequency edge of the second raster in the frequency domain is larger than the position of the high-frequency edge of the system bandwidth; and the first raster is closer to the low-frequency edge of the system bandwidth, and the position of the low-frequency edge of the first raster in the frequency domain is smaller than the position of the low-frequency edge of the system bandwidth.

[0072] The network device can transmit synchronization signal blocks in at least two rasters within the same raster group, and the raster group can be directly set within the raster group without dividing it into subgroups, or the raster group can be divided into subgroups and raster pairs can be set within raster subgroups.

[0073] For example, the at least two rasters include a first raster and a second raster, the network device transmits a first synchronization signal block in the first raster and a second synchronization signal block in the second raster, and the first synchronization signal block and the second synchronization signal block carry the same synchronization information.

[0074] A synchronization signal group corresponding to a raster group is defined, the same raster group is used to transmit at least two synchronization signal blocks, each raster in the raster group is used to transmit one synchronization signal block, and the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, where the same synchronization signal block group includes at least two synchronization signal blocks, and the synchronization information carried by the at least two synchronization signal blocks is the same.

[0075] Optionally, the raster is a synchronous raster or a channel raster.

[0076] Illustratively, the system bandwidth includes at least one of the system bandwidth of an LTE system and the system bandwidth of an NR system.

[0077] Optionally, the system bandwidth is less than 5 MHz, for example, the system bandwidth is 3 MHz or 3.6 MHz.

[0078] Optionally, the system bandwidth is less than 20 MHz, for example, the system bandwidth is 5 MHz, 8 MHz, or 10 MHz.

[0079] In summary, according to the synchronization signal block receiving method provided in this embodiment, the network device transmits synchronization signal blocks carrying the same synchronization information in at least two rasters, so that the user device can receive at least two synchronization signal blocks in at least two rasters and obtain complete synchronization information through at least two synchronization signals, thereby avoiding incomplete information due to insufficient bandwidth and also avoiding information loss during transmission.

[0080] From the above, the solution of the embodiment of the present application includes the following three points. 1) The design of the synchronization rasters is mainly characterized by the fact that the synchronization rasters correspond to each other in pairs, the distance between the corresponding synchronization rasters in a pair is fixed, and the distance from the upper / lower edges of the system bandwidth is fixed. 2) When the UE detects the SSBs, after detecting the first SSB, it determines the frequency domain location where the second SSB is transmitted. 3) Definition of SSB groups.

[0081] Regarding point 1), in an embodiment of the present application, the network device transmits an SSB at a frequency domain location where at least one synchronization raster is located within the system bandwidth, i.e., the center frequency point of the SSB is aligned with a synchronization raster. The UE determines the synchronization raster on which the SSB is transmitted through blind detection, and then receives and decodes the SSB to complete initial access. The SSB consists of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH), and the signals / channels included in the SSB occupy a maximum of 20 RBs in the frequency domain. When the SSB is punched / pierced, the upper and / or lower edges of the SSB exceed the system bandwidth by no more than 4 RBs. That is, the SSB is not punched / pierced by more than 4 RBs on one side. The punching / piercing method includes at least one of the following: 1) The network device maps the SSB information to 20RB, and the network device does not transmit any portion exceeding the system bandwidth. 2) The network device maps SSB information only to RBs within the system bandwidth, and does not map or transmit SSB information beyond the system bandwidth. 3) The network device maps the SSB information to 20RBs, and the UE does not receive any part that exceeds the system bandwidth.

[0082] In this embodiment, the UE receives at least n SSBs within a time period and combines the n SSBs, where n is an integer greater than or equal to 1. The time period is one or more slots, one or more radio frames; At least one of the half radio frames.

[0083] Preferably, the time periods may be 20ms, 40ms, 60ms, 80ms, 100ms, 120ms, 160ms, and 320ms.

[0084] Based on the above framework, the network device transmits an SSB on a synchronization raster predefined by a protocol, and the UE receives the SSB transmitted by the network device on the synchronization raster predefined by the protocol. The method for defining the synchronization raster includes at least one of the following:

[0085] Method 1: The protocol defines synchronization raster groups, each of which includes two synchronization raster subgroups, each of which includes at least two synchronization rasters. The synchronization rasters in the synchronization raster subgroups correspond to each other in pairs, and the corresponding synchronization rasters in the pair are separated in the frequency domain by e (the first frequency domain unit width), where e is at least one fixed value predefined by the protocol, and e is preferably at least one of 4RB, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0086] Method 2: The protocol defines synchronization raster groups, each of which includes at least two synchronization rasters, wherein at least two synchronization rasters in the synchronization raster group correspond to each other, and the pair of corresponding synchronization rasters are separated in the frequency domain by e, where e is at least one fixed value predefined by the protocol, and preferably e is at least one of 4RB, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0087] Method 3: The protocol defines synchronization raster groups, each of which includes a first synchronization raster subgroup and a second synchronization raster subgroup, each of which includes at least one synchronization raster. A synchronization raster in the first synchronization raster subgroup corresponds to a synchronization raster in the second synchronization raster subgroup in a pair. The distance between a synchronization raster in the first synchronization raster subgroup and the edge of the system bandwidth in the high-frequency direction is equal to or greater than a (the second frequency domain unit width), where a is at least one fixed value predefined by the protocol, and preferably a is at least one of 10 RBs, 1800 kHz, and 1850 kHz. The distance between a synchronization raster in the second synchronization raster subgroup and the edge of the system bandwidth in the low-frequency direction is equal to or greater than b (the third frequency domain unit width), where b is at least one fixed value predefined by the protocol, and preferably b is at least one of 6 RBs, 1080 kHz, and 1100 kHz.

[0088] Method 4: The protocol defines synchronization raster groups, each containing at least two synchronization rasters. The first and second synchronization rasters in the at least two synchronization rasters correspond to each other as a pair. The distance between the first synchronization raster and the edge of the system bandwidth in the high-frequency direction is equal to or greater than a, where a is at least one fixed value predefined by the protocol, and preferably a is at least one of 10RB, 1800 kHz, and 1850 kHz. The distance between the second synchronization raster and the edge of the system bandwidth in the low-frequency direction is equal to or greater than b, where b is at least one fixed value predefined by the protocol, and preferably b is at least one of 6RB, 1080 kHz, and 1100 kHz.

[0089] Regarding point 2), in an embodiment of the present application, a network device transmits an SSB in at least one synchronization raster or channel raster within the system bandwidth. That is, the center frequency point of the SSB is aligned with a certain synchronization raster or channel raster. The UE determines the synchronization raster transmitted by the SSB through blind detection, and then receives and decodes the SSB to complete initial access. The SSB consists of the PSS, SSS, and PBCH, and the signals / channels included in the SSB occupy a maximum of 20 RBs in the frequency domain. When an SSB is punched / pierced, the upper and / or lower edges of the SSB exceed the system bandwidth by 4 RBs or less. That is, the SSB is not punched / pierced by more than 4 RBs on one side.

[0090] In this embodiment, the UE receives at least n SSBs within a time period and combines the n SSBs, where n is an integer greater than or equal to 1 and divisible by 2. The time period is at least one of one or more slots, one or more radio frames, and half a radio frame. Preferably, the time period may be 20 ms, 40 ms, 60 ms, 80 ms, 100 ms, 120 ms, 160 ms, and 320 ms.

[0091] Based on the above framework, the network device transmits an SSB on a synchronization raster or a channel raster predefined by a protocol, and the UE receives the SSB transmitted by the network device on a synchronization raster or a channel raster predefined by a protocol. A specific method for the UE to determine the location of the SSB transmitted by the network device includes at least one of the following:

[0092] Method 1: The UE blindly detects SSBs on a synchronization raster predefined by the protocol to determine a frequency domain location where a first SSB is located, and the blind detection direction is from low frequency to high frequency. The UE detects a second SSB by offsetting the frequency domain location where the first SSB is located by e in the high frequency direction, where e is at least one fixed value predefined by the protocol, and preferably e is at least one of 4 RBs, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0093] Method 2: The UE blindly detects SSBs on a synchronization raster predefined by the protocol to determine a frequency domain location where a first SSB is located, and the blind detection direction is from high frequency to low frequency. The UE detects a second SSB by offsetting the frequency domain location where the first SSB is located by e in the low frequency direction, where e is at least one fixed value predefined by the protocol, and preferably e is at least one of 4 RBs, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0094] Method 3: The UE blindly detects SSBs on a channel raster predefined by the protocol to determine a frequency domain location where a first SSB is located, where the blind detection direction is from low frequency to high frequency. The UE detects a second SSB by offsetting the frequency domain location where the first SSB is located by e in the high frequency direction, where e is at least one fixed value predefined by the protocol, and preferably e is at least one of 4 RBs, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0095] Method 4: The UE blindly detects SSBs on a channel raster predefined by the protocol to determine a frequency domain location where a first SSB is located, and the blind detection direction is from high frequency to low frequency. The UE detects a second SSB by offsetting the frequency domain location where the first SSB is located by e in the low frequency direction, where e is at least one fixed value predefined by the protocol, and preferably e is at least one of 4 RBs, 720 kHz, 750 kHz, 700 kHz, and 800 kHz.

[0096] Regarding point 3), in an embodiment of the present application, the network device transmits the SSB in at least one synchronization raster or channel raster within the system bandwidth. That is, the center frequency point of the SSB is aligned with a synchronization raster or channel raster. The UE determines the synchronization raster on which the SSB is transmitted by blind detection, and then receives and decodes the SSB to complete initial access. The UE receives a group of SSBs within a time period. The time period is at least one of one or more slots, one or more radio frames, and half a radio frame. Preferably, the time period may be 20 ms, 40 ms, 60 ms, 80 ms, 100 ms, 120 ms, 160 ms, and 320 ms.

[0097] Based on the above framework, the characteristics of an SSB group include: It contains at least n SSBs, where n is an integer greater than or equal to 1 and divisible by 2. The information carried by SSBs within a group is the same. The SSBs within a group are transmitted on at least two synchronization or channel rasters.

[0098] Illustratively, as shown in FIG. 6, two SSBs in an SSB group are transmitted in a synchronous raster group within a first time period.

[0099] In summary, based on the above definitions of synchronization raster groups and SSB groups, multiple SSBs can be transmitted between network devices and user devices through multiple synchronization raster groups, and multiple SSBs carrying the same synchronization information can be combined to parse the complete synchronization information, thereby avoiding information loss in SSBs caused by issues such as punching.

[0100] FIG. 7 shows a block diagram of a synchronization signal block receiving device provided by an exemplary embodiment of the present invention, which can be implemented as part or all of a UE through software, hardware, or a combination of the two, and includes a receiving module 410.

[0101] The receiving module 410 is configured to receive synchronization signal blocks in at least two rasters.

[0102] In some embodiments, the at least two rasters belong to the same raster group.

[0103] The raster group includes at least one raster pair, the raster pair including a first raster and a second raster.

[0104] In some embodiments, the first raster and the second raster are separated by a first frequency domain unit width.

[0105] In some embodiments, the first raster is separated from a first edge of a system bandwidth of a communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width.

[0106] Here, the first edge is an edge in a first frequency domain direction of a system bandwidth, the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions.

[0107] In some embodiments, the receiving module 410 includes: receiving a first synchronization signal block in the first raster; receiving a second synchronization signal block in the second raster; configured to obtain synchronization information based on the first synchronization signal block and the second synchronization signal block; Here, the synchronization information carried by the first synchronization signal block and the second synchronization signal block is the same.

[0108] In some embodiments, the device further comprises a detection module 420 .

[0109] The detection module 420 determines a second frequency domain location of the first synchronization signal block, the second frequency domain location being offset by a first frequency domain unit width in a first frequency domain direction; The second synchronization signal block is configured to be detected from the second frequency domain location along a low-to-high frequency direction or a high-to-low frequency direction.

[0110] In some embodiments, the same raster group is used to transmit at least two synchronization signal blocks, each raster in the raster group is used to transmit one synchronization signal block, the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, and the synchronization information carried by the synchronization signal blocks in the same synchronization signal block group is the same.

[0111] In some embodiments, the raster is a synchronous raster or a channel raster.

[0112] 8 shows a block diagram of a synchronization signal block transmitting apparatus provided by an exemplary embodiment of the present invention. This apparatus can be implemented as part or all of a network device through software, hardware, or a combination of the two. The apparatus includes a transmitting module 510.

[0113] The transmission module 510 is configured to transmit synchronization signal blocks in at least two rasters.

[0114] In some embodiments, the at least two rasters belong to the same raster group.

[0115] The raster group includes at least one raster pair, the raster pair including a first raster and a second raster.

[0116] In some embodiments, the first raster and the second raster are separated by a first frequency domain unit width.

[0117] In some embodiments, the first raster is separated from a first edge of a system bandwidth of a communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width.

[0118] Here, the first edge is an edge in a first frequency domain direction of a system bandwidth, the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions.

[0119] In some embodiments, the transmitting module 510 includes: transmitting a first synchronization signal block in the first raster; configured to transmit a second synchronization signal block in the second raster; Here, the synchronization information carried by the first synchronization signal block and the second synchronization signal block is the same.

[0120] In some embodiments, the same raster group is used to transmit at least two synchronization signal blocks, each raster in the raster group is used to transmit one synchronization signal block, the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, and the synchronization information carried by the synchronization signal blocks in the same synchronization signal block group is the same.

[0121] In some embodiments, the raster is a synchronous raster or a channel raster.

[0122] 9 shows a schematic diagram of the structure of a UE provided by an exemplary embodiment of the present invention, which includes a processor 111, a receiver 112, a transmitter 113, a memory 114, and a bus 115.

[0123] The processor 111 includes one or more processing cores and executes various functional applications and information processing by executing software programs and modules.

[0124] The receiver 112 and the transmitter 113 can be implemented as one communication component, which may be one communication chip.

[0125] The memory 114 is connected to the processor 111 via a bus 115 .

[0126] The memory 114 is used to store at least one instruction, and the processor 111 executes the at least one instruction to implement each step in the above method embodiments.

[0127] Additionally, memory 114 may be implemented by any type of volatile or non-volatile storage device, or a combination thereof, including, but not limited to, a magnetic or optical disk, an electrically erasable programmable read only memory (EEPROM), an erasable programmable read only memory (EPROM), a static random-access memory (SRAM), a read only memory (ROM), a magnetic memory, a flash memory, and a programmable read only memory (PROM).

[0128] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, is also provided, and the instructions can be executed by a processor of the UE to complete the above-mentioned method for receiving a synchronization signal block. For example, the non-transitory computer-readable storage medium may be a ROM, a Random-Access Memory (RAM), a Compact Disc Read Only Memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0129] A non-transitory computer-readable storage medium enables a UE to perform the method for receiving a synchronization signal block when instructions in the non-transitory computer-readable storage medium are executed by a processor of the UE.

[0130] 10 is a block diagram of an access network device 700 according to an example embodiment. The access network device 700 may be a base station.

[0131] The access network device 700 may include a processor 701, a receiver 702, a transmitter 703, and a memory 704. The receiver 702, the transmitter 703, and the memory 704 are each connected to the processor 701 via a bus.

[0132] The processor 701 includes one or more processing cores and executes software programs and modules to implement the method performed by the access network device in the synchronization signal block transmission method provided by the embodiment of the present invention. The memory 704 can be used to store the software programs and modules. Specifically, the memory 704 can store an operating system 7041 and an application module 7042 required for at least one function. The receiver 702 is used to receive communication data transmitted from other devices, and the transmitter 703 is used to transmit communication data to other devices.

[0133] An exemplary embodiment of the present invention also provides a computer-readable storage medium having stored thereon at least one instruction, at least one section of a program, a code set or an instruction set, which, when loaded and executed by the processor, implements the method for receiving a synchronization signal block provided by each of the method embodiments above or the method for transmitting a synchronization signal block provided by each of the method embodiments above.

[0134] An exemplary embodiment of the present invention also provides a computer program product, the computer program product including computer instructions stored in a computer-readable storage medium, a processor of a computer device reading the computer instructions from the computer-readable storage medium, and the processor executing the computer instructions such that the computer device performs the method for receiving a synchronization signal block provided by each of the above method embodiments or the method for transmitting a synchronization signal block provided by each of the above method embodiments.

[0135] As used herein, "plurality" should be understood to mean two or more than two. "And / or" refers to an association relationship between related objects, meaning that a three-way relationship may exist. For example, A and / or B indicates that A may exist alone, A and B may exist together, and B may exist alone. The character " / " typically indicates that the preceding related object and the following related object are in an "or" relationship.

[0136] Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention which follow the general principles of the invention and include common knowledge or customary technical means in the art that are not disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

[0137] It should be understood that the present invention is not limited to the exact construction described above and illustrated in the drawings, but various modifications and changes are possible without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. 1. A method for receiving a synchronization signal block performed by a user device, comprising: receiving synchronization signal blocks in at least two rasters; A method characterized by:

2. the at least two rasters belong to the same raster group; The raster group includes at least one raster pair, the raster pair including a first raster and a second raster.

2. The method of claim 1 .

3. The first raster and the second raster are separated by a first frequency domain unit width.

3. The method of claim 2.

4. the first raster is separated from a first edge of a system bandwidth of a communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width; The first edge is an edge in a first frequency domain direction of the system bandwidth, the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions.

3. The method of claim 2.

5. The step of receiving synchronization signal blocks in the at least two rasters includes: receiving a first synchronization signal block in the first raster; receiving a second synchronization signal block in the second raster; acquiring synchronization information based on the first synchronization signal block and the second synchronization signal block; The synchronization information carried by the first synchronization signal block and the second synchronization signal block is the same.

5. The method according to claim 3 or 4.

6. determining a second frequency domain location of the first synchronization signal block, the second frequency domain location being offset by a first frequency domain unit width in a first frequency domain direction; and detecting the second synchronization signal block from the second frequency domain location along a low-to-high frequency direction or a high-to-low frequency direction.

6. The method of claim 5.

7. The same raster group is used to transmit at least two synchronization signal blocks, and each raster in the raster group is used to transmit one synchronization signal block, and the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, and the synchronization information carried by the synchronization signal blocks in the same synchronization signal block group is the same.

7. The method according to any one of claims 2 to 6.

8. The raster is a synchronous raster or a channel raster 7. The method according to any one of claims 1 to 6.

9. 1. A method for transmitting a synchronization signal block performed by a network device, comprising: transmitting synchronization signal blocks in at least two rasters. A method characterized by:

10. the at least two rasters belong to the same raster group; The raster group includes at least one raster pair, the raster pair including a first raster and a second raster.

10. The method of claim 9.

11. The first raster and the second raster are separated by a first frequency domain unit width.

11. The method of claim 10.

12. the first raster is separated from a first edge of a system bandwidth of a communication system by a second frequency domain unit width, and the second raster is separated from a second edge of the system bandwidth by a third frequency domain unit width; Here, the first edge is an edge in a first frequency domain direction of the system bandwidth, the second edge is an edge in a second frequency domain direction of the system bandwidth, and the first frequency domain direction and the second frequency domain direction are opposite frequency domain directions.

11. The method of claim 10.

13. The step of transmitting synchronization signal blocks in the at least two rasters includes: transmitting a first synchronization signal block in the first raster; transmitting a second synchronization signal block in the second raster; The synchronization information carried by the first synchronization signal block and the second synchronization signal block is the same.

13. The method according to claim 11 or 12.

14. The same raster group is used to transmit at least two synchronization signal blocks, and each raster in the raster group is used to transmit one synchronization signal block, and the at least two synchronization signal blocks transmitted in the same raster group belong to the same synchronization signal block group, and the synchronization information carried by the synchronization signal blocks in the same synchronization signal block group is the same.

14. The method according to any one of claims 10 to 13.

15. The raster is a synchronous raster or a channel raster 14. The method according to any one of claims 9 to 13.

16. a receiving module configured to receive synchronization signal blocks in at least two rasters; 10. A receiving device for a synchronization signal block, comprising:

17. a transmitting module configured to transmit synchronization signal blocks in at least two rasters; A synchronization signal block transmitting device comprising:

18. a processor and a transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the method for receiving a synchronization signal block according to any one of claims 1 to 8.

1. A user device comprising:

19. a processor and a transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the method for transmitting synchronization signal blocks according to any one of claims 9 to 15. A network device comprising:

20. At least one instruction, at least one section of a program, a code set or an instruction set is stored, and said at least one instruction, said at least one section of a program, said code set or instruction set is loaded and executed by a processor to implement the method for receiving a synchronization signal block according to any one of claims 1 to 8 or the method for transmitting a synchronization signal block according to any one of claims 9 to 15. A computer-readable storage medium.

21. The computer device includes computer instructions stored in a computer-readable storage medium, and a processor of the computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, thereby performing the method for receiving a synchronization signal block according to any one of claims 1 to 8 or the method for transmitting a synchronization signal block according to any one of claims 9 to 15.

1. A computer program product comprising:

22. A method for transmitting a synchronization signal block according to any one of claims 9 to 15, comprising: a user device and a network device, the user device being used to perform the method for receiving a synchronization signal block according to any one of claims 1 to 8; and the network device being used to perform the method for transmitting a synchronization signal block according to any one of claims 9 to 15. A communication system comprising:

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