Signal receiving method and apparatus, and device, medium and program product

Abstract

The present application belongs to the technical field of communications. Disclosed are a signal receiving method and apparatus, and a device, a medium and a program product. The method is executed by means of a terminal device and comprises: receiving a synchronization signal, wherein the synchronization signal comprises one or more PSSs; and receiving a plurality of synchronization channels associated with the synchronization signal, wherein each of the plurality of synchronization channels comprises a PBCH, and the plurality of synchronization channels occupy the same time-domain resource and different frequency-domain resources. By means of the method, the number of time-domain resources occupied during SSB transmission is reduced, and the flexibility of resource scheduling is improved.

Description

Signal receiving method, apparatus, device, medium and program product TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a signal receiving method, apparatus, device, medium and program product. BACKGROUND

[0002] Synchronization Signal Block (SSB) carries very important functions in communication transmission, such as carrying cell identification, time-frequency synchronization, indicating symbol level / slot level / frame timing, etc.

[0003] However, in the related art, since there is only one beam for simultaneous sending or receiving, the transmission of SSB can only be time-division multiplexed. Different SSBs need to occupy different time domain resources for transmission, resulting in occupation of a large amount of time domain resources.

[0004] SUMMARY

[0005] The present application provides a signal receiving method, apparatus, device, medium and program product, which at least includes:

[0006] According to an aspect of an embodiment of the present application, a signal receiving method is provided, which is executed by a terminal device, and the method includes:

[0007] receiving a synchronization signal, the synchronization signal including one or more Primary Synchronization Signals (PSS); and receiving a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels including a Physical Broadcast CHannel (PBCH); wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0008] According to another aspect of an embodiment of the present application, a signal sending method is provided, which is executed by a network device, and the method includes:

[0009] sending a synchronization signal, the synchronization signal including one or more PSS; and sending a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels including a PBCH; wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0010] According to another aspect of an embodiment of the present application, a signal receiving apparatus is provided, which includes:

[0011] The receiving module is configured to receive a synchronization signal, the synchronization signal comprising one or more PSSs; and receive a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a PBCH; wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0012] According to another aspect of embodiments of the present application, a signal sending apparatus is provided, the apparatus comprising:

[0013] The sending module is configured to send a synchronization signal, the synchronization signal comprising one or more PSSs; and send a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a PBCH; wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0014] According to another aspect of embodiments of the present application, a terminal device is provided, the terminal device comprising:

[0015] The terminal device further comprises a processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the signal receiving method according to any one of the above aspects.

[0016] According to another aspect of embodiments of the present application, a network device is provided, the network device comprising:

[0017] The network device further comprises a processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the signal sending method according to any one of the above aspects.

[0018] According to another aspect of embodiments of the present application, a computer readable storage medium is provided, the computer readable storage medium storing at least one program, the at least one program being loaded and executed by a processor to implement the signal receiving method or the signal sending method according to any one of the above aspects.

[0019] According to another aspect of embodiments of the present application, a chip is provided, the chip comprising a programmable logic circuit and / or program instructions, when the chip is running on a terminal device, the chip is configured to implement the signal receiving method according to any one of the above aspects, and when the chip is running on a network device, the chip is configured to implement the signal sending method according to any one of the above aspects.

[0020] According to another aspect of embodiments of the present application, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer readable storage medium, a processor obtaining the computer instructions from the computer readable storage medium, and the processor executing the computer instructions to implement the signal receiving method or the signal sending method according to any one of the above aspects.

[0021] The technical scheme provided by the embodiments of the present application can include the following beneficial effects:

[0022] The method transmits a synchronization signal and a plurality of synchronization channels associated with the synchronization signal, wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources, and the SSB includes the synchronization signal and the plurality of synchronization channels, thereby reducing the number of time domain resources occupied during SSB transmission and improving the flexibility of resource scheduling. Meanwhile, the transmission window of the SSB can be shortened, and the time for RRM measurement can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] FIG. 1 shows a schematic diagram of an SSB structure provided by the related art;

[0025] FIG. 2 shows a schematic diagram of beam scanning of an SSB provided by the related art;

[0026] FIG. 3 shows a schematic diagram of time slot positions for SSB transmission provided by the related art;

[0027] FIG. 4 shows a schematic diagram of symbol positions for SSB transmission provided by the related art;

[0028] FIG. 5 shows a schematic diagram of mapping relationship between an SSB and a physical random access channel transmission opportunity provided by the related art;

[0029] FIG. 6 shows a schematic diagram of a mobile communication system provided by an example embodiment of the present application;

[0030] FIG. 7 shows a flowchart of a signal transmission method provided by an example embodiment of the present application;

[0031] FIG. 8 shows a schematic diagram of a transmission beam provided by an example embodiment of the present application;

[0032] FIG. 9 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application;

[0033] FIG. 10 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application;

[0034] FIG. 11 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application;

[0035] FIG. 12 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0036] FIG. 13 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0037] FIG. 14 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0038] FIG. 15 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0039] FIG. 16 shows a schematic diagram of a transmission beam according to an example embodiment of the application;

[0040] FIG. 17 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0041] FIG. 18 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0042] FIG. 19 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0043] FIG. 20 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0044] FIG. 21 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0045] FIG. 22 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0046] FIG. 23 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0047] FIG. 24 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0048] FIG. 25 shows a schematic diagram of a transmission beam according to an example embodiment of the application;

[0049] FIG. 26 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the application;

[0050] FIG. 27 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application;

[0051] FIG. 28 shows a flowchart of a signal receiving method according to an example embodiment of the present application;

[0052] FIG. 29 shows a block diagram of a signal transmitting apparatus according to an example embodiment of the present application;

[0053] FIG. 30 shows a block diagram of a signal receiving apparatus according to an example embodiment of the present application;

[0054] FIG. 31 shows a structural diagram of a terminal device according to an example embodiment of the present application;

[0055] FIG. 32 shows a structural diagram of a network device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0056] For the purpose of the present application, the technical solutions and advantages will be more clearly apparent from the following further detailed description of the embodiments, which will be described in conjunction with the attached drawings. The example embodiments will be described in detail in this specification. The example embodiments are shown in the drawings. In the following description, similar numbers refer to similar elements unless otherwise described. The embodiments described in the following example embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0057] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in the present disclosure and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0058] It should be understood that although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a particular order or hierarchy. These terms are used only to distinguish one from another. For example, a first information can be termed a second information, and similarly, a second information can be termed a first information, without departing from the scope of the present disclosure. Depending on the context, the word "if' as used herein can be interpreted as meaning "when" or "in response to determining."

[0059] The technical solutions described in some embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, evolved system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system, cellular Internet of Things system, cellular passive Internet of Things system, and can also be applied to the evolved system after 5G NR system, and can also be applied to 6G and subsequent evolved systems.

[0060] It should be understood that in some embodiments of the present application, "5G" can also be referred to as "5G NR" or "NR".

[0061] It should be understood that in the description of the embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, can also represent an associated relationship between the two, and can also indicate a relationship such as indicated, configured, and configured.

[0062] In embodiments of the present application, "predefined" can be implemented by pre-storing corresponding codes, tables or other means for indicating relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit the specific implementation manner thereof. For example, predefined can refer to that defined in a protocol.

[0063] In embodiments of the present application, "protocol" can refer to a standard protocol in the field of communication, for example, can include LTE protocol, NR protocol and relevant protocols applied in future communication systems, and the present application does not limit this.

[0064] In embodiments of the present application, the same word appearing in the same meaning, for example, multiple synchronization channels in embodiments of the present application represent multiple synchronization channels (SSB#0 to SSB#3) using frequency division multiplexing as shown in FIG. 9.

[0065] Next, the synchronization signal block (Synchronization Signal Block, SSB) is introduced:

[0066] The SSB carries very important functions in the initial access process, such as carrying the cell ID (IDentification, ID), time-frequency synchronization, indicating symbol level / slot level / frame timing, cell / beam signal strength / signal quality measurement, etc. To support these functions, the SSB contains the primary synchronization signal (Primary Synchronization Signal, PSS), the secondary synchronization signal (Secondary Synchronization Signal, SSS), the physical broadcast channel (Physical Broadcast CHannel, PBCH) and its reference signal demodulation reference symbol (DeModulation Reference Symbol, DMRS). Among them, PSS and SSS are used to carry cell ID (which can carry 1008 cell IDs), complete time-frequency synchronization, and obtain symbol level timing; the reference signal DMRS of SSS and PBCH can be used for cell or beam signal strength / signal quality measurement; PBCH is used to indicate slot / frame timing information, etc. The information carried by PBCH includes 8-bit information in the master information block (Master Information Block, MIB) information and physical layer information. The physical layer information includes system frame number (System Frame Number, SFN), half-frame indication, SSB index, etc. The MIB information carried by PBCH includes 6-bit SFN information field, 1-bit subcarrier spacing information field, 4-bit SSB subcarrier offset information field and 8-bit pdcch-ConfigSIB1 information field, etc.

[0067] FIG. 1 shows a schematic diagram of an SSB structure provided by the related art. In the figure, the bandwidths of PSS and SSS are 12 physical resource blocks (PRBs), the bandwidth of PBCH is 20 PRBs, and 4 PRBs are added on both sides of SSS for PBCH transmission.

[0068] FIG. 2 shows a schematic diagram of beam sweeping of SSB provided by the related art. In order to cover a larger range, as shown in FIG. 2, SSB is transmitted on a specific beam after beamforming, a plurality of SSBs form a set of SSB burst sets, and are successively transmitted in a beam sweeping manner in the time domain, thereby realizing full-cell coverage of the synchronization signal. The SSBs in the SSB burst set are constrained within a system half frame, and the cell information carried on each SSB in a SSB burst set is the same.

[0069] In the related protocol design, each SSB is assigned a determined and unique index in an SSB burst set, namely SSB index (SSBIndex). When a user equipment (UE) detects a certain SSB, the position information of the SSB in a SSB burst set can be determined by identifying the SSB index, thereby determining the timing of the SSB in a system half frame. In a specific implementation, the UE obtains the SSB index by reading the load of PBCH. For a frequency spectrum below 6 GHz, there are at most 8 SSBs in a SSB burst set, and at most 3 bits are needed to indicate the serial numbers of the 8 SSBs. The 3 bits are implicitly carried by the DMRS sequence of PBCH, and there are 8 different DMRS sequences of PBCH, respectively corresponding to 8 different SSB serial numbers. At present, up to 64 SSBs can be configured for a frequency spectrum above 6 GHz, and 6 bits are needed to indicate the SSB indexes of the 64 SSBs. The lower 3 bits of the 6 bits are carried by the DMRS sequence of PBCH, and the additional upper 3 bits are directly indicated by the load content of PBCH.

[0070] The related protocol stipulates the SSB timing candidate positions for SSB transmission corresponding to different SSB indexes. In a system half frame, the time slots available for transmission of synchronization signal blocks are limited.

[0071] FIG. 3 shows a schematic diagram of time slot positions for SSB transmission provided by the related art. When at most 4 SSBs are allowed to be transmitted in a system half frame, the first 2 time slots in the half frame are allowed to transmit SSBs. When at most 8 SSBs are allowed to be transmitted in a system half frame, the first 4 time slots in the half frame are allowed to transmit SSBs. The positions available for transmission of SSBs in a time slot are also limited, and the protocol specifically stipulates which symbols can be used for transmission of SSBs and which symbols cannot be used for transmission of SSBs.

[0072] FIG. 4 shows a diagram of symbol positions for SSB transmission according to the related art. Taking the sub-6 GHz spectrum as an example, there are three transmission schemes: scheme A, scheme B, and scheme C. For scheme A, the symbol positions in which SSB can be transmitted within one slot with 15 kHz subcarrier spacing are symbol numbers 2, 3, 4, 5, 8, 9, 10, and 11 within one system half frame. For scheme B, the symbol positions in which SSB can be transmitted within two slots with 30 kHz subcarrier spacing are symbol numbers 4 to 11 within the first system half frame and symbol numbers 2 to 9 within the second system half frame. For scheme C, the symbol positions in which SSB can be transmitted within two slots with 30 kHz subcarrier spacing are symbol numbers 2, 3, 4, 5, 8, 9, 10, and 11 within the first system half frame and symbol numbers 2, 3, 4, 5, 8, 9, 10, and 11 within the second system half frame.

[0073] Based on the above protocol agreement, the symbol positions in which SSB can be transmitted are arranged in sequence to obtain all SSB timing candidate positions within a system half frame, and each SSB timing candidate position corresponds to a specific SSB number. When the UE determines the SSB number, the specific timing information within the system half frame can be deduced according to the protocol agreement.

[0074] In time, the SSB burst set is transmitted periodically. The period parameters of SSB periodic transmission mainly include two cases: the first case is that when performing cell search, the UE does not obtain the configuration of the SSB period, and the protocol agreement stipulates that the UE can assume that the SSB period is 20 ms to facilitate the UE to perform cell search according to the fixed 20 ms transmission period, thereby reducing the complexity of cell search and detection; the second case is that when the UE performs other operations such as radio resource management (RRM) measurement based on SSB, the transmission period of SSB can be flexibly configured by the network device. The related protocol currently supports multiple periods such as 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms, and the network device can configure the UE through high-layer signaling as needed.

[0075] Next, the mapping relationship between SSB and physical random access channel transmission opportunities is introduced.

[0076] Before the network device communicates with the UE, the network device needs to know the beam where the UE is located and then set the appropriate beam direction in the subsequent data transmission process. Since the physical random access channel (PRACH) in the random access process is the first information sent by the UE to the network device, and the network device needs to know the beam information of the UE for the transmission of message 2 (msg2), the function of reporting the beam where the UE is located is carried by the PRACH. Since the preamble is a sequence signal and cannot explicitly carry information, the time-frequency resources occupied by the preamble or different preamble code word sequences can be used to implicitly carry the beam information. Therefore, it is necessary to establish the mapping relationship between the SSB and the physical random access channel transmission opportunity (PRACH Occasion, RO).

[0077] Before the UE initiates random access, the UE measures and evaluates the signal quality of the cell and the signal strength of each SSB in the cell. When sending the PRACH, the UE sends the preamble on the RO corresponding to the SSB with the strongest or relatively strong signal. If the network device successfully receives the preamble, it knows the downlink beam information of the UE based on the RO where the preamble is located, and then uses the downlink beam information for subsequent communication, such as message 2 (msg2), message 4 (msg4), etc. There are three possible mapping relationships between SSB and RO: one-to-one mapping; many-to-one mapping; one-to-many mapping.

[0078] Considering the support of diversified scenarios, these three mapping relationships are supported in the related standards. For example, in the scenario with fewer users, multiple SSBs can be supported to correspond to the same RO to save PRACH resources, and multiple SSBs share the preambles in the same RO, that is, different SSBs correspond to different preamble subsets in the same RO; in the scenario with more users, one SSB can be supported to correspond to multiple ROs to provide sufficient PRACH capacity.

[0079] FIG. 5 shows a schematic diagram of mapping relationship of SSB and RO provided by the related art. In the figure, four SSBs (SSB 1 to SSB 4) are respectively mapped to four ROs (RO 0 to RO 3) of a first RO time position in the order of frequency from low to high, i.e., SSB 1 corresponds to RO 0, SSB 2 corresponds to RO 1, SSB 3 corresponds to RO 2, and SSB 4 corresponds to RO 3, and are respectively mapped to four ROs (RO 4 to RO 7) of a second RO time in the order of frequency from low to high, i.e., SSB 1 corresponds to RO 4, SSB 2 corresponds to RO 5, SSB 3 corresponds to RO 6, and SSB 4 corresponds to RO 7. In the figure, each SSB occupies X1 time domain resources, and the interval between adjacent SSBs is Y1. Therefore, the total time domain resources occupied by the transmitted SSBs 1 to SSB 4 are 4X1+3Y1.

[0080] FIG. 6 shows a schematic diagram of a mobile communication system provided by an example embodiment of the present application. The mobile communication system includes a network device 110 and a terminal device 120, and can or can not include a terminal device 130, which is not limited by the present application.

[0081] The network device 110 in the present application provides wireless communication functions, which includes but is not limited to: an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved node B or a home node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., and can also be a next generation node B (gNB) or a transmission point (TRP or TP) in a 5th generation (5G) mobile communication system, or an antenna panel or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc., or a base station in a beyond 5th generation (B5G) or a 6th generation (6G) mobile communication system, or a core network (CN), a fronthaul, a backhaul, a radio access network (RAN), a network slice, etc., or a serving cell, a primary cell (PCell), a primary secondary cell (PSCell), a special cell (SpCell), a secondary cell (SCell), a neighboring cell, etc., of a terminal device.

[0082] The terminal device 120 in the present application, also known as a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, a user apparatus. The terminal includes but is not limited to: a handheld device, a wearable device, a vehicle-mounted device, and an Internet of Things device, etc., such as: a mobile phone, a tablet computer, an electronic book reader, a laptop computer, a desktop computer, a television, a game console, a Mobile Internet Device (MID), an Augmented Reality (AR) terminal, a Virtual Reality (VR) terminal, and a Mixed Reality (MR) terminal, an Extended Reality (XR) terminal, a Baffle Reality (BR) terminal, a Cinematic Reality (CR) terminal, a Deceive Reality (DR) terminal, a wearable device, a handle, an electronic sign, a controller, a wireless terminal in Industrial Control, a wireless terminal in Self Driving, a wireless terminal in Remote Medical, a wireless terminal in Smart Grid, a wireless terminal in Transportation Safety, a wireless terminal in Smart City, a wireless terminal in Smart Home, a wireless terminal in Remote Medical Surgery, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a television set-top box (STB), a Customer Premise Equipment (CPE), etc.

[0083] In some embodiments, the network device 110 and the terminal device 120 communicate with each other through a certain air interface technology, such as a Uu interface.

[0084] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. The uplink communication, also referred to as uplink transmission, refers to transmitting a signal or data to the network device 110; and the downlink communication, also referred to as downlink transmission, refers to transmitting a signal or data to the terminal device 120.

[0085] In some embodiments, the terminal device 120 and the terminal device 130 communicate with each other through a certain air interface technology, for example, a PC5 interface.

[0086] Exemplarily, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sidelink communication scenario and a second sidelink communication scenario. The first sidelink communication refers to transmitting a signal from the terminal device 120 to the terminal device 130; and the second sidelink communication refers to transmitting a signal from the terminal device 130 to the terminal device 120.

[0087] In some embodiments, the terminal device 120 and the terminal device 130 are both in network coverage and located in the same cell, or the terminal device 120 and the terminal device 130 are both in network coverage but located in different cells, or the terminal device 120 is in network coverage but the terminal device 130 is out of network coverage.

[0088] In some embodiments of the present application, the "NR" can also be referred to as a 5G NR system or a 5G system. The 5G mobile communication system can include a non-standalone (Non-Stand Alone, NSA) and / or standalone (Stand Alone, SA).

[0089] The technical solutions provided by the embodiments in the present application can also be applied to Machine Type Communication (MTC), Long Term Evolution-Machine (LTE-M), Device to Device (D2D) network, Machine to Machine (M2M) network, Internet of Things (IoT) network, or other networks. The IoT network may, for example, include a vehicle network. In the vehicle network system, the communication modes are collectively referred to as Vehicle to X (V2X, X can represent any object), for example, the V2X can include Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication, Vehicle to Pedestrian (V2P) communication, or Vehicle to Network (V2N) communication, and the like.

[0090] The mobile communication system provided by the embodiments in the present application can be applied to at least one of the following communication scenarios: uplink communication scenario, downlink communication scenario, and sidelink communication scenario.

[0091] The SSB carries very important functions in communication transmission, such as carrying cell identification, time-frequency synchronization, indicating symbol level / slot level / frame timing, and the like. However, in the related art, since there is only one beam for simultaneous sending or receiving, the transmission of the SSB can only be time-division multiplexed, and different SSBs need to occupy different time domain resources for transmission, resulting in a very long transmission window of the SSB burst set, which needs to occupy a large amount of time domain resources. Since the SSB and many downlink signals cannot be transmitted simultaneously, it will also affect the transmission of other user uplink signals. The large amount of time domain resource overhead will affect the scheduling and transmission of other signals, thereby reducing the transmission efficiency.

[0092] To solve the above problems, the present application provides a signal sending method. FIG. 7 shows a flowchart of a signal sending method provided by an example embodiment of the present application, which is executed by a network device, and the method includes:

[0093] Step 710: transmitting a synchronization signal, and transmitting a plurality of synchronization channels associated with the synchronization signal;

[0094] The synchronization signal includes one or more PSS, each of the plurality of synchronization channels includes a PBCH, and the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0095] In some embodiments, the SSB comprises a synchronization signal and a synchronization channel, wherein the synchronization signal comprises a PSS and a SSS, and the synchronization channel comprises a PBCH; or the synchronization signal comprises a PSS, and the synchronization channel comprises a SSS and a PBCH.

[0096] In some embodiments, the synchronization channel associated with the synchronization signal is a synchronization channel adjacent to the synchronization signal in the time domain; or is a synchronization channel identical to the synchronization signal in the frequency domain; or is a synchronization channel belonging to the same SSB as the synchronization signal.

[0097] In some embodiments, the number of the plurality of synchronization channels is determined according to a frequency band in which the synchronization channel is located, and / or a subcarrier spacing used for transmitting the synchronization channel; or the number of the plurality of synchronization channels is determined according to first information carried by the synchronization channel, the first information being used to indicate the number of the plurality of synchronization channels.

[0098] The network device and the terminal device agree in advance that different frequency bands and / or subcarrier spacings correspond to different numbers of synchronization channels. For example, the higher the frequency band, the greater the number of synchronization channels. For example, in the case where the frequency band is lower than a pre-set first threshold frequency band, the number of synchronization channels M = 4; in the case where the frequency band is higher than the pre-set first threshold frequency band, the number of synchronization channels M = 8.

[0099] Alternatively, each synchronization channel carries first information occupying n bits, and the number of synchronization channels is indicated by the first information. For example, in the case where n = 2, the first information can indicate a maximum of 4 synchronization channels, and in the case where n = 3, the first information can indicate a maximum of 8 synchronization channels. In an implementation, the n bits can all be carried by the synchronization channel, or part of the bits can be carried by the DMRS sequence of the synchronization channel.

[0100] In some embodiments, there is a frequency domain guard interval between the plurality of synchronization channels. For example, a fixed number of subcarriers are used as the frequency domain guard interval, thereby preventing signal leakage between different synchronization channels.

[0101] In some embodiments, the plurality of synchronization channels are transmitted by different beams. FIG. 8 shows a schematic diagram of a transmission beam according to an example embodiment of the present application. Taking the case where the synchronization signal comprises a PSS and the synchronization channel comprises a SSS and a PBCH, and the number of synchronization channels is 4 as an example, that is, one PSS corresponds to 4 synchronization channels, PSS1 corresponds to synchronization channel 1 to synchronization channel 4, and PSS2 corresponds to synchronization channel 5 to synchronization channel 8.

[0102] Different synchronization channels are transmitted through different beams, for example, synchronization channel 1 is transmitted through beam 801, synchronization channel 2 is transmitted through beam 802, synchronization channel 3 is transmitted through beam 803, and synchronization channel 4 is transmitted through beam 804.

[0103] FIG. 9 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. The synchronization signal includes a PSS, the synchronization channel includes an SSS and a PBCH, and the number of synchronization channels is 4 for example. Since the PSS is common, one synchronization channel can also be referred to as an SSB. Each SSB occupies time domain resources X1, and the synchronization signal occupies time domain resources Y2. Therefore, the total time domain resources occupied by transmitting the synchronization signal and SSB 1 to SSB 4 are X1+Y2. The four SSBs in FIG. 9 and the four SSBs in the related art of FIG. 5 are also transmitted through four beams. The total time domain resources required to transmit SSB 1 to SSB 4 in the related art are 4X1+3Y1, and the method of the present application occupies less time domain resources Z=3X1+3Y1-Y2. In general, Z is greater than 0.

[0104] In some embodiments, the content contained in the synchronization signal includes at least one of the following cases: case one: the synchronization signal includes a PSS; case two: the synchronization signal includes a PSS and an SSS; and case three: the synchronization signal includes multiple PSSs and multiple SSSs.

[0105] For case one, the synchronization signal includes a PSS.

[0106] Each synchronization channel further includes an SSS, i.e., each synchronization channel includes an SSS and a PBCH. In this embodiment, since the PSS is common, one synchronization channel can also be referred to as an SSB.

[0107] In some embodiments, the PBCH includes a DMRS, which is used for demodulation of the PBCH and can also be used for measurement of cell or beam signal strength / signal quality.

[0108] In some embodiments, multiple synchronization channels occupying the same time domain resources and different frequency domain resources form an SSB group, and multiple SSB groups are contained in one SSB transmission window. Different SSB groups can occupy different time domain resources and are transmitted using different beams.

[0109] In some embodiments, multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0110] For example, the bandwidth of each synchronization channel is 20 PRBs, and multiple synchronization channels occupy adjacent and continuous multiple 20 PRBs.

[0111] The beam for transmitting the PSS and the synchronization channel is:

[0112] In some embodiments, the SSS and the PBCH belonging to the same synchronization channel are transmitted through the same beam, and the PSS and the multiple synchronization channels are transmitted through different beams.

[0113] As shown in FIG. 8, taking the number of synchronization channels as 4 as an example, one PSS corresponds to four synchronization channels, PSS1 corresponds to synchronization channel 1 to synchronization channel 4, and PSS2 corresponds to synchronization channel 5 to synchronization channel 8.

[0114] The SSS and the PBCH belonging to the same synchronization channel are transmitted through the same beam, for example, SSS1 and PBCH1 both belong to synchronization channel 1, and SSS1 and PBCH1 are transmitted through the same beam 801; the PSS and the multiple synchronization channels are transmitted through different beams, for example, PSS1 is transmitted through beam 810, and synchronization channel 1 is transmitted through beam 801; the SSS and the PBCH belonging to different synchronization channels are transmitted through different beams, for example, SSS1 and PBCH1 both belong to synchronization channel 1, SSS2 and PBCH2 both belong to synchronization channel 2, SSS3 and PBCH3 both belong to synchronization channel 3, and SSS4 and PBCH2 both belong to synchronization channel 4, synchronization channel 1 is transmitted through beam 801, synchronization channel 2 is transmitted through beam 802, synchronization channel 3 is transmitted through beam 803, and synchronization channel 4 is transmitted through beam 804.

[0115] In some embodiments, the beam width of the beam for transmitting the PSS is greater than the beam width of the beam for transmitting the multiple synchronization channels.

[0116] In some embodiments, the direction of the beam for transmitting the PSS contains the direction of the beam for transmitting the multiple synchronization channels.

[0117] As shown in FIG. 8, beam 810 for transmitting PSS1 is a wide beam, and the beams for transmitting the multiple synchronization channels are narrow beams, for example, beam 801 for transmitting synchronization channel 1 is a narrow beam, the beam width of beam 810 is greater than the beam width of beam 801, and the direction of beam 810 contains the directions of beams 801 to 804, and beams 801 to 804 are respectively used for transmitting synchronization channels 1 to 4.

[0118] Based on the above manner, the PSS using a wide beam can cover a larger range, and since the detection threshold of the PSS is low, more terminal devices can detect the synchronization signal. The synchronization channel using a narrow beam can obtain greater beamforming gain, thereby improving the detection performance of the PBCH.

[0119] The frequency domain resource position of the synchronization signal has a fixed correspondence with the frequency domain resource position of the plurality of synchronization channels.

[0120] In some embodiments, the frequency domain resource position of the synchronization signal has a fixed correspondence with the frequency domain resource position of the plurality of synchronization channels.

[0121] In some embodiments, when the synchronization signal includes one PSS, the frequency domain resource position of the synchronization signal has a fixed correspondence with the frequency domain resource position of the plurality of synchronization channels, including at least one of the following: the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels.

[0122] FIGS. 10 and 11 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application, where the white blocks represent synchronization channels including SSS and PBCH, and the blocks filled with diagonal lines represent PSS.

[0123] Taking the number of synchronization channels as 4 as an example, one PSS corresponds to 4 synchronization channels, SSB represents one synchronization channel, and a plurality of synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources for transmission.

[0124] In FIG. 10, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB#10 or SSB#14; for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB#N0 or SSB#N4.

[0125] Alternatively, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB#13 or SSB#17; for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB#N3 or SSB#N7.

[0126] In FIG. 11, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, that is, the PSS is at the center position of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS is in the middle of the frequency point of SSB#1 and the frequency point of SSB#2, or in the middle of the frequency point of SSB#5 and the frequency point of SSB#6.

[0127] In some embodiments, the bandwidth of the synchronization signal is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0128] FIG. 12 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. Taking the number of synchronization channels as 4 as an example, that is, one PSS corresponds to 4 synchronization channels, and SSB represents one synchronization channel. Among them, the bandwidth of the PSS is equal to the sum of the bandwidths of the 4 synchronization channels, the PSS uses a larger bandwidth for transmission, and the synchronization channel uses a smaller bandwidth for transmission, thereby improving the detection performance of the PSS.

[0129] In some embodiments, the SSB grid includes SSBs occupying continuous frequency domain resources and different time domain resources on one frequency band. The terminal device needs to detect the SSBs on different SSB grids to determine the frequency domain position of the SSB.

[0130] As shown in FIG. 10, SSB grid 1 includes SSB#10 to SSB#17, wherein SSB#10 to SSB#13 occupy the same time domain resources, SSB#14 to SSB#17 occupy the same time domain resources, SSB#10 and SSB#14 occupy different time domain resources, and SSB#10 to SSB#13 and SSB#14 to SSB#17 occupy the same continuous frequency domain resources.

[0131] SSB grid N includes SSB#N0 to SSB#N7, wherein SSB#N0 to SSB#N3 occupy the same time domain resources, SSB#N4 to SSB#N7 occupy the same time domain resources, SSB#N0 and SSB#N4 occupy different time domain resources, and SSB#N0 to SSB#N3 and SSB#N4 to SSB#N7 occupy the same continuous frequency domain resources.

[0132] For the multiplexing mode of SSS and PBCH:

[0133] In some embodiments, the frequency point of the PBCH is the same as the frequency point of the corresponding SSS, the bandwidth of the PBCH is greater than the bandwidth of the SSS, and the PBCH is transmitted on both sides of the SSS.

[0134] FIGS. 13 to 15 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application.

[0135] The synchronization channel includes SSS and PBCH. Taking the number of synchronization channels as 4 as an example, in FIG. 13, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS is the same as the frequency point of the synchronization channel corresponding to PBCH#0.

[0136] In FIG. 14, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, for example, the frequency point of the PSS is in the middle of the frequency point of the synchronization channel corresponding to PBCH#1 and the frequency point of the synchronization channel corresponding to PBCH#2.

[0137] In FIG. 15, the bandwidth of the PSS is equal to the sum of the bandwidths of the multiple synchronization channels, for example, the bandwidth of the PSS is equal to the sum of the bandwidths of the synchronization channel corresponding to the PBCH#0 to the synchronization channel corresponding to the PBCH#3.

[0138] For the method of determining the SSB index:

[0139] In some embodiments, the multiple synchronization channels occupy the same time domain resources and different frequency domain resources, and carry the same SSB index indication information.

[0140] Since the multiple synchronization channels carry the same SSB index indication information and MIB, the information bits carried by the multiple synchronization channels are completely the same.

[0141] In some embodiments, the SSB index indication information is carried by the PBCH and / or the DMRS of the PBCH in the synchronization channel.

[0142] In some embodiments, the SSB index of each synchronization channel in the multiple synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0143] In some embodiments, the determination method includes at least one of the following three methods:

[0144] Method one: the SSB index indication information indicates the SSB index of a first synchronization channel in the multiple synchronization channels, and the SSB index of the other synchronization channels except the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain position of the other synchronization channels.

[0145] In some embodiments, the first synchronization channel is the synchronization channel with the lowest frequency point or the synchronization channel with the highest frequency point in the multiple synchronization channels.

[0146] In some embodiments, the frequency domain position of the synchronization channel is used to determine a first index value, and the first index value is an index value obtained by arranging the multiple synchronization channels in a specified order according to the corresponding frequency points.

[0147] As shown in FIG. 11, the first synchronization channel is the synchronization channel with the lowest frequency point in the multiple synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus a first index value n, and n is an index value obtained by arranging the multiple synchronization channels in the order from low to high frequency points, i.e., the synchronization channel with the lowest frequency point n=0 (SSB#0 or SSB#4), the second lowest synchronization channel n=1 (SSB#1 or SSB#5), and so on.

[0148] As shown in FIG. 12, the first synchronization channel is the synchronization channel with the highest frequency point among the multiple synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the synchronization channel is indicated by SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus a first index value n, where n is an index value obtained by arranging the multiple synchronization channels in descending order of frequency points, i.e., the synchronization channel with the highest frequency point n = 0 (SSB#0 or SSB#4), the second highest frequency point n = 1 (SSB#1 or SSB#5), and so on.

[0149] The SSB index indication information can indicate values of k*M (k = 0, 1, 2, …, N / M-1), and X1 bits of information are used to indicate the values, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, and M is the number of the multiple synchronization channels using frequency division multiplexing. N and M are positive integers, and N is greater than or equal to M.

[0150] For example, in FIG. 11, N = 8, M = 4, and k = 0, 1, so the SSB index indication information can indicate values of 0 and 4, and 1 bit of information is used to indicate the values.

[0151] Method two: The SSB index indication information indicates the index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and the frequency domain position of each synchronization channel, where the SSB group contains multiple synchronization channels.

[0152] In some embodiments, the SSB index indication information indicates the index of the SSB group as k (k = 0, 1, 2, …, N / M-1), and X1 bits of information are used to indicate the index, and the SSB index of each synchronization channel is K = k*M+n, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, M is the number of the multiple synchronization channels, N and M are positive integers, N is greater than or equal to M, and n is an index value obtained by arranging the multiple synchronization channels in descending order (or ascending order) of frequency points.

[0153] For example, in FIG. 11, N = 8, M = 4, and k = 0, 1, and 1 bit of information is used to indicate the values, where the SSB index K0 corresponding to SSB#0 is 0*4+0 = 0, the SSB index K1 corresponding to SSB#1 is 0*4+1 = 1, the SSB index K4 corresponding to SSB#4 is 1*4+0 = 4, the SSB index K5 corresponding to SSB#5 is 1*4+1 = 5, and so on.

[0154] Method three: in some embodiments, the SSB index is determined according to second information of X bits, the first X1 bits of the second information are indicated by the SSB index indication information, and the last X2 bits of the second information are determined by the frequency domain position of the synchronization channel.

[0155] wherein X is the upward integer value of log2(N), X1 is the upward integer value of log2(N / M), X2 is the upward integer value of log2(M), N is the total number of candidate SSBs, M is the number of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

[0156] In some embodiments, the last X2 bits correspond to the value of the first index value n, and n is the index value obtained by arranging the multiple synchronization channels in ascending (or descending) order of frequency points.

[0157] For example, in FIG. 11, N=8, M=4, the SSB index is determined according to second information of log2(8)=3 bits, the first log2(8 / 4)=1 bit of the second information is indicated by the SSB index indication information, and the last log2(4)=2 bits of the second information is determined by the first index value n. For example, for SSB#0, the SSB index indication information indicates that the first 1 bit of the second information is 0, the first index value n is 0, so the last 2 bits of the second information is 00, and the second information is 000; for SSB#5, the SSB index indication information indicates that the first 1 bit of the second information is 1, the first index value n is 1, so the last 2 bits of the second information is 01, and the second information is 101.

[0158] In some embodiments, SSBs (synchronization channels) using frequency division multiplexing and SSBs (synchronization channels) using time division multiplexing in one SSB synchronization period correspond to different SSB indexes. For example, the SSB index arrangement method of first frequency domain and then time domain can be used, as shown in FIG. 10 and FIG. 11. Wherein SSBs with different indexes are transmitted by different beams, so as to cover the entire cell through the scanning of multiple beams. Since the SSB multiplexing method using frequency division multiplexing and time division multiplexing is combined, more SSBs can be supported in the same SSB transmission window.

[0159] In the above method, since the frequency domain position of the synchronization channel is known, the SSB index indication information only needs to indicate part of the SSB index information, thereby reducing the information bits carried by the synchronization channel compared with directly indicating the SSB index, and improving the detection performance of the SSB.

[0160] For case two: the synchronization signal includes one PSS and one SSS.

[0161] In some embodiments, the PSS and the SSS are transmitted on the same time domain resource and different frequency domain resources; or, the PSS and the SSS are transmitted on different time domain resources and the same frequency domain resources.

[0162] In some embodiments, the plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

[0163] For the beams for transmitting the synchronization signals and the synchronization channels:

[0164] In some embodiments, the PSS and the SSS are transmitted through the same beam, and the PSS and the PBCH are transmitted through different beams.

[0165] In some embodiments, the PBCHs belonging to different synchronization channels are transmitted through different beams.

[0166] FIG. 16 shows a schematic diagram of the beams for transmission according to an example embodiment of the present application. Taking the number of synchronization channels as 4 for example, i.e., one PSS and one SSS correspond to 4 PBCHs, PSS1 and SSS1 correspond to PBCH 1 to PBCH 4, and PSS2 and SSS2 correspond to PBCH 5 to PBCH 8.

[0167] The PSS and the SSS are transmitted through the same beam, e.g., PSS1 and SSS1 are transmitted through the same beam 1610, and PSS2 and SSS2 are transmitted through the same beam 1620; the PSS and the PBCH are transmitted through different beams, e.g., PSS1 is transmitted through beam 1610, and PBCH 1 is transmitted through beam 1601; the PBCHs belonging to different synchronization channels are transmitted through different beams, e.g., PBCH 1 is transmitted through beam 1601, PBCH 2 is transmitted through beam 1602, PBCH 3 is transmitted through beam 1603, and PBCH 4 is transmitted through beam 1604.

[0168] In some embodiments, the beam width of the beam for transmitting the PSS and the SSS is greater than the beam width of the beam for transmitting the PBCH.

[0169] In some embodiments, the direction of the beam for transmitting the PSS and the SSS contains the direction of the beam for transmitting the PBCH.

[0170] As shown in FIG. 16, the beam 1610 for transmitting PSS1 and SSS1 is a wide beam, and the beams for transmitting the plurality of PBCHs are narrow beams, e.g., the beam 1601 for transmitting PBCH 1 is a narrow beam, the beam width of the beam 1610 is greater than the beam width of the beam 1601, and the direction of the beam 1610 contains the directions of the beams 1601 to 1604, and the beams 1601 to 1604 are respectively used for transmitting PBCH 1 to PBCH 4.

[0171] Based on the above manner, the PSS and the SSS can cover a larger range, and more terminal devices can detect the synchronization signal due to the low detection threshold of the PSS. The narrow beam of the synchronization channel can obtain greater beamforming gain, thereby improving the detection performance of the PBCH.

[0172] The frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence.

[0173] In some embodiments, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence.

[0174] In some embodiments, when the synchronization signal includes one PSS and one SSS, the plurality of synchronization channels form one SSB group, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence, including at least one of the following:

[0175] The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the center frequency point of the plurality of synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; the PSS and the SSS are distributed on any side of the SSB group.

[0176] FIGS. 17 and 18 respectively show schematic diagrams of the synchronization signal and the synchronization channel transmission method provided by an example embodiment of the present application. The white square represents the PBCH, the square filled with the right-up to left-down diagonal line represents the PSS, and the square filled with the left-up to right-down diagonal line represents the SSS.

[0177] Taking the number of PBCHs as 4 as an example, one PSS and one SSS correspond to four synchronization channels (PBCHs), and the plurality of synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and be transmitted by different beams.

[0178] In FIG. 17, the PSS and the SSS adopt a multiplexing manner of time division multiplexing, and occupy continuous symbols and the same bandwidth. The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as the frequency point of PBCH#0 or PBCH#4.

[0179] Alternatively, the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as the frequency point of PBCH#3 or PBCH#7.

[0180] In FIG. 18, the PSS and the SSS adopt a multiplexing manner of time division multiplexing, and occupy continuous symbols and the same bandwidth. The frequency points of the PSS and the SSS are the same as the center frequency points of the plurality of synchronization channels, that is, the PSS and the SSS are at the center positions of the entire SSB group. As shown in FIG. 11, the frequency points of the PSS and the SSS are in the middle of the frequency points of the PBCH#1 and the PBCH#2, or in the middle of the frequency points of the PBCH#5 and the PBCH#6.

[0181] FIGS. 19 to 21 respectively show schematic diagrams of a synchronization signal and a synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, the white blocks represent PBCHs, the blocks filled with right-up-to-left-down diagonal lines represent PSSs, and the blocks filled with left-up-to-right-down diagonal lines represent SSSs.

[0182] Taking the number of PBCHs as 4 as an example, that is, one PSS and one SSS correspond to four synchronization channels (PBCHs), and a plurality of synchronization channels form an SSB group, different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0183] In FIG. 19, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, and occupy the same symbols and continuous bandwidth. The PSS and the SSS are distributed on any side (upper side or lower side) of the SSB group, for example, the frequency points of the PSS are the same as the frequency points of the PBCH#0 or the PBCH#4, and the frequency points of the SSS are the same as the frequency points of the PBCH#1 or the PBCH#5.

[0184] In FIG. 20, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, and occupy the same symbols and continuous bandwidth. The PSS and the SSS are distributed in the middle of the SSB group, for example, the frequency points of the PSS are the same as the frequency points of the PBCH#1, and the frequency points of the SSS are the same as the frequency points of the PBCH#2.

[0185] In FIG. 21, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, and occupy the same symbols and continuous bandwidth. The PSS and the SSS are distributed on both sides of the SSB group, for example, the frequency points of the PSS are the same as the frequency points of the PBCH#0, and the frequency points of the SSS are the same as the frequency points of the PBCH#3.

[0186] The PSS and the SSS adopting the multiplexing manner of frequency division multiplexing can reduce the time domain resources occupied by the synchronization signals, thereby improving the flexibility of scheduling of other signals.

[0187] In some embodiments, the sum of the bandwidths of the PSS and the SSS is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0188] FIG. 22 to FIG. 24 respectively show schematic diagrams of the synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, white squares represent PBCHs, squares filled with right-to-left diagonal lines represent PSSs, and squares filled with left-to-right diagonal lines represent SSSs.

[0189] For example, taking the number of PBCHs as 4, one PSS and one SSS correspond to 4 synchronization channels (PBCHs), and multiple synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and be transmitted by different beams.

[0190] In FIG. 22, the PSS and the SSS occupy the same symbol and continuous bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#0 and PBCH#1, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#2 and PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#4 and PBCH#5, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#6 and PBCH#6.

[0191] In FIG. 23, the PSS and the SSS occupy continuous symbols and the same bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#4 to PBCH#7, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#4 to PBCH#7.

[0192] In FIG. 24, the PSS and the SSS occupy continuous symbols, the bandwidth of the PSS is the same as or close to the bandwidth of PBCH#0, and the bandwidth of the SSS is greater than the bandwidth of the PSS, for example, the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3, thereby improving the detection performance of the SSS without increasing the PSS blind detection complexity.

[0193] For the method of determining the SSB index:

[0194] In some embodiments, the SSB index of each of the multiple synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0195] For specific implementation details, refer to the description in Case One, which will not be repeated here.

[0196] For Case Three: the synchronization signal includes multiple PSSs and multiple SSSs.

[0197] The plurality of PSSs and the plurality of SSSs correspond to the plurality of synchronization channels one by one. Each SSB includes one PSS, one SSS, and one PBCH (synchronization channel), and the plurality of SSBs use frequency division multiplexing transmission.

[0198] In some embodiments, the plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

[0199] For the beams for transmitting the synchronization signal and the synchronization channel:

[0200] In some embodiments, the PSS, the SSS, and the PBCH included in the same SSB are transmitted by the same beam.

[0201] In some embodiments, different SSBs are transmitted by different beams.

[0202] FIG. 25 shows a schematic diagram of transmitting beams according to an example embodiment of the present application, where PSS1, SSS1, and PBCH 1 belong to SSB 1, and PSS2, SSS2, and PBCH 2 belong to SSB 2.

[0203] The PSS, the SSS, and the PBCH included in the same SSB are transmitted by the same beam, for example, PSS1, SSS1, and PBCH 1 are all transmitted by beam 2510, and PSS2, SSS2, and PBCH 2 are all transmitted by beam 2520.

[0204] Different SSBs are transmitted by different beams, for example, SSB 1 is transmitted by beam 2510, and SSB 2 is transmitted by beam 2520.

[0205] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels:

[0206] In some embodiments, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence.

[0207] In some embodiments, in the case where the synchronization signal includes a plurality of PSSs and a plurality of SSSs, each PSS, each SSS, and each synchronization channel correspond to each other one by one, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence, including that the frequency points of the PSS, the SSS, and the synchronization channel corresponding to each other are the same.

[0208] FIG. 26 shows a schematic diagram of a synchronization signal and a synchronization channel transmission method according to an example embodiment of the present application. The white block represents an SSB, including a PSS, an SSS, and a PBCH.

[0209] A plurality of SSBs form one SSB group, and taking the number of SSBs included in each SSB group as 4 as an example, a plurality of time division multiplexing SSB groups are included in one SSB transmission window, different SSB groups occupy different time domain resources and are transmitted by using different beams.

[0210] In FIG. 26, a plurality of SSBs occupy the same symbol and continuous bandwidth by using frequency division multiplexing multiplexing. For example, SSB#0 to SSB#3 occupy the same symbol and continuous bandwidth, or SSB#4 to SSB#7 occupy the same symbol and continuous bandwidth.

[0211] In FIG. 27, in each SSB of one SSB group, the frequency points of the PSS, the SSS, and the PBCH in one-to-one correspondence are the same, for example, the frequency points of PSS#1, SSS#1, and PBCH#1 are the same.

[0212] For the method of determining the SSB index:

[0213] In some embodiments, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0214] The specific implementation details are described in case one, which will not be repeated here.

[0215] For any one of the above three cases, the network device sends SSB measurement configuration:

[0216] In some embodiments, the method further includes: sending SSB measurement configuration, the SSB measurement configuration being used to indicate the resource position of the SSB to be detected by the terminal device;

[0217] The SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponding to one SSB group, and the value of each bit being used to indicate whether the terminal device detects the SSB group corresponding to the current bit, the SSB group including a plurality of synchronization channels; or, the SSB measurement configuration includes indication information of the SSB group and indication information of the synchronization channel, the indication information of the synchronization channel being used to indicate the position of the target synchronization channel in the SSB group, and the SSB group including a plurality of synchronization channels.

[0218] In the case where the SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponding to one SSB group, when the network device sends the SSB group, the bit value is 1, indicating that the terminal device can detect the SSB group; when the network device does not send the SSB group, the bit value is 0, indicating that the terminal device does not need to detect the SSB group.

[0219] In some embodiments, the SSB measurement configuration is carried via a system information block (SIB) or PBCH.

[0220] In the case where the SSB measurement configuration includes indication information of the SSB group and indication information of the synchronization channel, the indication information of the SSB group is used to indicate an SSB group, and the indication information of the synchronization channel is used to indicate the position of the target synchronization channel in the SSB group. Through this method, the network device indicates the position of the SSB resource that the terminal device currently needs to measure and report the measurement results, thereby obtaining corresponding downlink channel information such as beam quality information. For example, the network device indicates the SSB measurement configuration through the channel state information (Channel-State Information, CSI) measurement resource, so that the terminal device reports the reference signal receiving power (Reference Signal Receiving Power, RSRP) or signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) based on the measured SSB.

[0221] In some embodiments, the SSB measurement configuration is a CSI measurement resource configuration indicated by radio resource control (RRC) signaling.

[0222] For any of the above three situations, the network device determines the target synchronization channel:

[0223] In some embodiments, the method further comprises: receiving a PRACH, and determining a corresponding target synchronization channel based on the PRACH;

[0224] The multiple synchronization channels correspond to the same PRACH transmission resource, and each of the multiple synchronization channels corresponds to a preamble sequence on the PRACH transmission resource; or

[0225] Multiple synchronization channels correspond to different PRACH transmission resources on the same time domain resources; or,

[0226] There is a preset mapping relationship between the PRACH transmission resource and the index of the SSB group where the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group. The SSB group contains multiple synchronization channels.

[0227] Case 1: multiple synchronization channels correspond to the same PRACH transmission resource, and each of the multiple synchronization channels corresponds to a preamble code sequence on the PRACH transmission resource.

[0228] In some embodiments, each SSB group (synchronization channel group) corresponds to the same PRACH transmission resource, and each synchronization channel in the SSB group corresponds to a preamble sequence on the PRACH transmission resource, i.e., the frequency division multiplexed synchronization channels are distinguished by preamble sequences. For time division multiplexed different SSB groups, the same PRACH transmission resource can be corresponded to, so that the PRACH transmission resources of different SSB groups are also distinguished by preamble sequences; or different PRACH transmission resources can also be corresponded to.

[0229] Case two: multiple synchronization channels correspond to different PRACH transmission resources on the same time domain resource.

[0230] In some embodiments, the multiple synchronization channels correspond to different PRACH transmission resources on the same symbol, respectively, and the network device determines the target synchronization channel according to the PRACH transmission resource on which the received PRACH is located.

[0231] Case three: the PRACH transmission resource has a preset mapping relationship with the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group.

[0232] In some embodiments, each PRACH transmission resource has a preset mapping relationship with the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and the mapping relationship is shown in Table 1:

[0233] Table 1

[0234] In some embodiments, the network device determines the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel according to the PRACH transmission resource on which the received PRACH is located, and thereby determines the target synchronization channel.

[0235] For example, the network device receives the PRACH transmission resource RO2, determines the index k=0 of the SSB group, and the frequency domain position index n=1 of the target synchronization channel, and thereby determines the target synchronization channel.

[0236] In some embodiments, the beam used to transmit the target synchronization channel is the beam used to transmit subsequent other downlink signals, so as to utilize the beam with the optimal quality to ensure the transmission performance of the subsequent other downlink signals.

[0237] In conclusion, the method provided in the embodiment reduces the number of time domain resources occupied by SSB during transmission, improves the flexibility of resource scheduling, and can also shorten the transmission window of SSB, thereby reducing the time of RRM measurement.

[0238] FIG. 28 shows a flowchart of a signal receiving method provided in an example embodiment of the present application, which is performed by a terminal device, and the method includes the following steps:

[0239] Step 2810: receiving a synchronization signal and receiving a plurality of synchronization channels associated with the synchronization signal.

[0240] The synchronization signal includes one or more PSS, and each of the plurality of synchronization channels includes a PBCH, and the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0241] In some embodiments, the SSB includes the synchronization signal and the synchronization channel, wherein the synchronization signal includes a PSS and a SSS, and the synchronization channel includes a PBCH; or, the synchronization signal includes a PSS, and the synchronization channel includes a SSS and a PBCH.

[0242] In some embodiments, the synchronization channel associated with the synchronization signal is a synchronization channel adjacent to the synchronization signal in the time domain; or, is a synchronization channel identical to the synchronization signal in the frequency domain; or, is a synchronization channel belonging to the same SSB as the synchronization signal.

[0243] In some embodiments, the number of the plurality of synchronization channels is determined according to the frequency band in which the synchronization channel is located and / or the subcarrier spacing used to transmit the synchronization channel; or, the number of the plurality of synchronization channels is determined according to first information carried by the synchronization channel, the first information being used to indicate the number of the plurality of synchronization channels.

[0244] The network device and the terminal device pre-agree that different frequency bands and / or subcarrier spacings correspond to a number M of synchronization channels. For example, the higher the frequency band, the greater the number of synchronization channels. For example, in the case where the frequency band is lower than a pre-set first threshold frequency band, the number M of synchronization channels is 4; in the case where the frequency band is higher than the pre-set first threshold frequency band, the number M of synchronization channels is 8.

[0245] Alternatively, each synchronization channel carries first information occupying n bits, and the number of synchronization channels is indicated by the first information. For example, in the case of n = 2, the first information can indicate a maximum of 4 synchronization channels, and in the case of n = 3, the first information can indicate a maximum of 8 synchronization channels. In an embodiment, n bits can be carried by the synchronization channel, or part of the bits can be carried by the DMRS sequence of the synchronization channel.

[0246] In some embodiments, there is a frequency domain guard interval between the plurality of synchronization channels. For example, a fixed number of subcarriers are used as a frequency domain guard interval to prevent signal leakage between different synchronization channels.

[0247] In some embodiments, the content of the synchronization signal includes at least one of the following cases: Case 1: the synchronization signal includes one PSS; Case 2: the synchronization signal includes one PSS and one SSS; Case 3: the synchronization signal includes multiple PSS and multiple SSS.

[0248] For Case 1: the synchronization signal includes one PSS.

[0249] Each synchronization channel further includes an SSS, i.e., each synchronization channel includes an SSS and a PBCH. In this embodiment, since the PSS is common, one synchronization channel can also be referred to as one SSB.

[0250] In some embodiments, the PBCH includes a DMRS, which is used for demodulation of the PBCH and can also be used for measurement of cell or beam signal strength / signal quality.

[0251] In some embodiments, multiple synchronization channels occupying the same time domain resources and different frequency domain resources form one SSB group, and multiple SSB groups are included in one SSB transmission window, and different SSB groups can occupy different time domain resources and use different beams for transmission.

[0252] In some embodiments, the multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0253] For example, the bandwidth of each synchronization channel is 20 PRBs, and the multiple synchronization channels occupy adjacent and continuous multiple 20 PRBs.

[0254] For the relationship between the PSS and the synchronization channel:

[0255] In some embodiments, the SSS and the PBCH belonging to the same synchronization channel are Quasi Co-Located (QCL), and the PSS and the multiple synchronization channels are non-QCL.

[0256] The QCL parameter includes a spatial reception parameter QCL typeD. The terminal device can assume that the SSS contained in one synchronization channel and the PBCH use the same transmission beam, and the terminal device cannot assume that multiple synchronization channels use the same transmission beam, and needs to receive multiple synchronization channels based on the assumption of different transmission beams.

[0257] The frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence.

[0258] In some embodiments, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence.

[0259] In some embodiments, in the case where the synchronization signal includes one PSS, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence, including at least one of the following:

[0260] The frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the multiple synchronization channels; the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the multiple synchronization channels; and the frequency point of the PSS is the same as the center frequency point of the multiple synchronization channels.

[0261] FIGS. 10 and 11 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application, wherein the white square represents a synchronization channel including SSS and PBCH, and the square filled with diagonal lines represents a PSS.

[0262] Taking the number of synchronization channels as 4 as an example, one PSS corresponds to 4 synchronization channels, SSB represents one synchronization channel, and multiple synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources for transmission.

[0263] In FIG. 10, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the multiple synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB#10 or SSB#14; and for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB#N0 or SSB#N4.

[0264] Optionally, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the multiple synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB#13 or SSB#17; and for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB#N3 or SSB#N7.

[0265] In FIG. 11, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, that is, the PSS is in the center position of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS is in the middle of the frequency point of SSB#1 and the frequency point of SSB#2, or in the middle of the frequency point of SSB#5 and the frequency point of SSB#6.

[0266] In some embodiments, the bandwidth of the synchronization signal is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0267] FIG. 12 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. Taking the number of synchronization channels as 4 as an example, that is, one PSS corresponds to 4 synchronization channels, and SSB represents one synchronization channel. Among them, the bandwidth of the PSS is equal to the sum of the bandwidths of the 4 synchronization channels, the PSS is transmitted with a larger bandwidth, and the synchronization channel is transmitted with a smaller bandwidth, thereby improving the detection performance of the PSS.

[0268] In some embodiments, the SSB grid includes SSBs occupying continuous frequency domain resources and different time domain resources on one frequency band. The terminal device needs to detect the SSBs on different SSB grids to determine the frequency domain position of the SSB.

[0269] As shown in FIG. 10, SSB grid 1 includes SSB#10 to SSB#17, wherein SSB#10 to SSB#13 occupy the same time domain resources, SSB#14 to SSB#17 occupy the same time domain resources, SSB#10 and SSB#14 occupy different time domain resources, and SSB#10 to SSB#13 and SSB#14 to SSB#17 occupy the same continuous frequency domain resources.

[0270] SSB grid N includes SSB#N0 to SSB#N7, wherein SSB#N0 to SSB#N3 occupy the same time domain resources, SSB#N4 to SSB#N7 occupy the same time domain resources, SSB#N0 and SSB#N4 occupy different time domain resources, and SSB#N0 to SSB#N3 and SSB#N4 to SSB#N7 occupy the same continuous frequency domain resources.

[0271] In some embodiments, the terminal device respectively detects the SSBs on the time-frequency resources of each candidate SSB group until a complete SSB is detected.

[0272] In some embodiments, the terminal device detects the synchronization signal using the same receive beam; performs blind detection of the PSS on the transmission resource of the PSS on each raster; after detecting the PSS, determines the resource position of the plurality of synchronization channels according to the resource position relationship between the PSS and the synchronization channel; on the resource position of each synchronization channel, the terminal device performs detection of the SSS on the transmission resource of the SSS; after detecting the SSS, the terminal device further detects the PBCH in the same synchronization channel.

[0273] In some embodiments, after the terminal device completes detection of the SSS and the PBCH, the terminal device completes initial synchronization with the network device.

[0274] Optionally, the terminal device continues to perform detection of other synchronization channels, and determines an SSB with the highest receive intensity, which is used to determine the transmission resource of the PRACH.

[0275] Based on the above method, after the terminal device detects the synchronization signal, the terminal device can further determine the position of the synchronization channel according to the corresponding relationship of the frequency domain resource position, and further detect the corresponding SSS and PBCH.

[0276] For the multiplexing manner of the SSS and the PBCH:

[0277] In some embodiments, the frequency point of the PBCH is the same as the frequency point of the corresponding SSS, the bandwidth of the PBCH is greater than the bandwidth of the SSS, and the PBCH is transmitted on both sides of the SSS.

[0278] FIGS. 13 to 15 respectively show schematic diagrams of a transmission method of a synchronization signal and a synchronization channel according to an example embodiment of the present application.

[0279] The synchronization channel includes the SSS and the PBCH. Taking the number of synchronization channels as 4 as an example, in FIG. 13, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS is the same as the frequency point of the synchronization channel corresponding to the PBCH#0.

[0280] In FIG. 14, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, for example, the frequency point of the PSS is in the middle of the frequency point of the synchronization channel corresponding to the PBCH#1 and the frequency point of the synchronization channel corresponding to the PBCH#2.

[0281] In FIG. 15, the bandwidth of the PSS is equal to the sum of the bandwidths of the plurality of synchronization channels, for example, the bandwidth of the PSS is equal to the sum of the bandwidths of the synchronization channel corresponding to the PBCH#0 to the synchronization channel corresponding to the PBCH#3.

[0282] For the method of determining the SSB index:

[0283] In some embodiments, the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources, and carry the same SSB index indication information.

[0284] Since the plurality of synchronization channels carry the same SSB index indication information and MIB, the information bits carried by the plurality of synchronization channels are completely the same. At this time, the terminal device can perform joint detection based on the plurality of candidate PBCHs, thereby improving the detection success rate of the PBCH. For example, the detection signals on the plurality of PBCH candidate positions are soft bit combined or received signal combined, thereby improving the detection performance.

[0285] In some embodiments, the SSB index indication information is carried by the PBCH and / or the DMRS of the PBCH in the synchronization channel.

[0286] In some embodiments, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0287] In some embodiments, the determination method includes at least one of the following three methods:

[0288] Method one: the SSB index indication information indicates the SSB index of a first synchronization channel in the plurality of synchronization channels, and the SSB index of the other synchronization channels other than the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain position of the other synchronization channels.

[0289] In some embodiments, the first synchronization channel is the synchronization channel with the lowest frequency point in the plurality of synchronization channels, or the synchronization channel with the highest frequency point.

[0290] In some embodiments, the frequency domain position of the synchronization channel is used to determine a first index value, and the first index value is an index value obtained by arranging the plurality of synchronization channels in a specified order according to the corresponding frequency points.

[0291] As shown in FIG. 11, the first synchronization channel is the synchronization channel with the lowest frequency point in the plurality of synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus a first index value n, and n is an index value obtained by arranging the plurality of synchronization channels in the order from low to high frequency points, i.e., the synchronization channel with the lowest frequency point n=0 (SSB#0 or SSB#4), the second-lowest synchronization channel n=1 (SSB#1 or SSB#5), and so on.

[0292] As shown in FIG. 12, the first synchronization channel is the synchronization channel with the highest frequency point among the multiple synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the synchronization channel is indicated by SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus a first index value n, where n is an index value obtained by arranging the multiple synchronization channels in descending order of frequency points, i.e., the synchronization channel with the highest frequency point n = 0 (SSB#0 or SSB#4), the second highest frequency point n = 1 (SSB#1 or SSB#5), and so on.

[0293] The SSB index indication information can indicate values of k*M (k = 0, 1, 2, …, N / M-1), and X1 bits of information are used to indicate the values, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, and M is the number of the multiple synchronization channels using frequency division multiplexing. N and M are positive integers, and N is greater than or equal to M.

[0294] For example, in FIG. 11, N = 8, M = 4, and k = 0, 1, so the SSB index indication information can indicate values of 0 and 4, and 1 bit of information is used to indicate the values.

[0295] Method two: The SSB index indication information indicates the index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and the frequency domain position of each synchronization channel, where the SSB group contains multiple synchronization channels.

[0296] In some embodiments, the SSB index indication information indicates the index of the SSB group as k (k = 0, 1, 2, …, N / M-1), and X1 bits of information are used to indicate the index, and the SSB index of each synchronization channel is K = k*M+n, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, M is the number of the multiple synchronization channels, N and M are positive integers, N is greater than or equal to M, and n is an index value obtained by arranging the multiple synchronization channels in descending order of frequency points (or in ascending order of frequency points).

[0297] For example, in FIG. 11, N = 8, M = 4, and k = 0, 1, and 1 bit of information is used to indicate the values, where the SSB index K0 corresponding to SSB#0 is 0*4+0 = 0, the SSB index K1 corresponding to SSB#1 is 0*4+1 = 1, the SSB index K4 corresponding to SSB#4 is 1*4+0 = 4, the SSB index K5 corresponding to SSB#5 is 1*4+1 = 5, and so on.

[0298] Method three: in some embodiments, the SSB index is determined according to second information of X bits, the first X1 bits of the second information are indicated by the SSB index indication information, and the last X2 bits of the second information are determined by the frequency domain position of the synchronization channel.

[0299] wherein X is the upward rounding value of log2(N), X1 is the upward rounding value of log2(N / M), X2 is the upward rounding value of log2(M), N is the total number of candidate SSBs, M is the number of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

[0300] In some embodiments, the last X2 bits correspond to the value of the first index value n, and n is the index value obtained by arranging the synchronization channels in ascending (or descending) order of frequency points.

[0301] For example, in FIG. 11, N=8, M=4, the SSB index is determined according to second information of log2(8)=3 bits, the first log2(8 / 4)=1 bit of the second information is indicated by the SSB index indication information, and the last log2(4)=2 bits of the second information is determined by the first index value n. For example, for SSB#0, the SSB index indication information indicates that the first 1 bit of the second information is 0, the first index value n is 0, so the last 2 bits of the second information is 00, and the second information is 000; for SSB#5, the SSB index indication information indicates that the first 1 bit of the second information is 1, the first index value n is 1, so the last 2 bits of the second information is 01, and the second information is 101.

[0302] In the above method, since the frequency domain position of the synchronization channel is known, the SSB index indication information only needs to indicate part of the SSB index information, thereby reducing the information bits carried by the synchronization channel compared with directly indicating the SSB index, and improving the detection performance of the SSB.

[0303] In some embodiments, the SSBs (synchronization channels) using frequency division multiplexing and the SSBs (synchronization channels) using time division multiplexing in one SSB synchronization period correspond to different SSB indexes. For example, the SSB index arrangement method of first frequency domain and then time domain can be used, as shown in FIG. 10 and FIG. 11. Among them, the SSBs using different indexes are transmitted by different beams, so as to cover the entire cell through the scanning of multiple beams. Since the SSB multiplexing method using frequency division multiplexing and time division multiplexing is combined, more SSBs can be supported in the same SSB transmission window.

[0304] In some embodiments, the SSB index is used to determine the starting position of the subframe and the symbol, to determine the PRACH transmission resource, to configure the measurement resource of the SSB, or to perform downlink measurement, etc.

[0305] For case two, the synchronization signal includes one PSS and one SSS.

[0306] In some embodiments, the PSS and the SSS are transmitted on the same time domain resource and different frequency domain resources; or, the PSS and the SSS are transmitted on different time domain resources and the same frequency domain resources.

[0307] In some embodiments, the multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0308] For the relationship between the PSS and the synchronization channel:

[0309] In some embodiments, the PSS and the SSS are QCL, and the PSS and the PBCH are non-QCL.

[0310] In some embodiments, the multiple synchronization channels are non-QCL.

[0311] The QCL parameter includes a spatial receiving parameter QCL typeD. The terminal device can assume that the PSS and the SSS use the same transmission beam, the terminal device cannot assume that the PSS and the PBCH use the same transmission beam, and the terminal device cannot assume that the multiple synchronization channels use the same transmission beam, and needs to receive based on the assumption of different transmission beams.

[0312] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels:

[0313] In some embodiments, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence.

[0314] In some embodiments, in the case where the synchronization signal includes one PSS and one SSS, the multiple synchronization channels form one SSB group, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence, and include at least one of the following:

[0315] The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the multiple synchronization channels; the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the multiple synchronization channels; the frequency point of the PSS and the SSS is the same as the center frequency point of the multiple synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; the PSS and the SSS are distributed on any one side of the SSB group.

[0316] FIGS. 17 and 18 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. The white square represents the PBCH, the square filled with the right-up to left-down diagonal line represents the PSS, and the square filled with the left-up to right-down diagonal line represents the SSS.

[0317] For example, when the number of PBCHs is 4, one PSS and one SSS correspond to 4 synchronization channels (PBCHs), and multiple synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0318] In FIG. 17, the PSS and the SSS are multiplexed by using time division multiplexing, occupy continuous symbols and the same bandwidth, and have the same frequency point as the synchronization channel with the lowest frequency point in the multiple synchronization channels. For example, the PSS and the SSS have the same frequency point as the frequency point of PBCH#0 or PBCH#4.

[0319] Optionally, the PSS and the SSS have the same frequency point as the frequency point of the synchronization channel with the highest frequency point in the multiple synchronization channels. For example, the PSS and the SSS have the same frequency point as the frequency point of PBCH#3 or PBCH#7.

[0320] In FIG. 18, the PSS and the SSS are multiplexed by using time division multiplexing, occupy continuous symbols and the same bandwidth, and have the same frequency point as the center frequency of the multiple synchronization channels, that is, the PSS and the SSS are located at the center of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS and the SSS is in the middle of the frequency point of PBCH#1 and the frequency point of PBCH#2, or in the middle of the frequency point of PBCH#5 and the frequency point of PBCH#6.

[0321] FIGS. 19 to 21 respectively show schematic diagrams of a synchronization signal and a synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, a white square represents a PBCH, a square filled with a right-up-to-left-down diagonal line represents a PSS, and a square filled with a left-up-to-right-down diagonal line represents an SSS.

[0322] For example, when the number of PBCHs is 4, one PSS and one SSS correspond to 4 synchronization channels (PBCHs), and multiple synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0323] In FIG. 19, the PSS and the SSS are multiplexed by using frequency division multiplexing, occupy the same symbol and continuous bandwidth, and are distributed on any side (upper side or lower side) of the SSB group. For example, the PSS has the same frequency point as the frequency point of PBCH#0 or PBCH#4, and the SSS has the same frequency point as the frequency point of PBCH#1 or PBCH#5.

[0324] In FIG. 20, the PSS and the SSS are multiplexed by using frequency division multiplexing, occupy the same symbol and continuous bandwidth, and are distributed in the middle of the SSB group. For example, the PSS has the same frequency point as the frequency point of PBCH#1, and the SSS has the same frequency point as the frequency point of PBCH#2.

[0325] In FIG. 21, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, occupy the same symbol and continuous bandwidth. The PSS and the SSS are distributed on both sides of the SSB group, for example, the frequency point of the PSS is the same as that of the PBCH#0, and the frequency point of the SSS is the same as that of the PBCH#3.

[0326] The PSS and the SSS adopt the multiplexing manner of frequency division multiplexing, which can reduce the time domain resources occupied by the synchronization signal, thereby improving the flexibility of scheduling of other signals.

[0327] In some embodiments, the sum of the bandwidths of the PSS and the SSS is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0328] FIGS. 22 to 24 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. The white square represents the PBCH, the square filled with the right-up-to-left-down diagonal line represents the PSS, and the square filled with the left-up-to-right-down diagonal line represents the SSS.

[0329] Taking the number of PBCHs as 4 as an example, one PSS and one SSS correspond to four synchronization channels (PBCHs), a plurality of synchronization channels form an SSB group, and different SSB groups can occupy different time domain resources and be transmitted by different beams.

[0330] In FIG. 22, the PSS and the SSS occupy the same symbol and continuous bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#0 and the PBCH#1, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#2 and the PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#4 and the PBCH#5, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#6 and the PBCH#6.

[0331] In FIG. 23, the PSS and the SSS occupy continuous symbols and the same bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#4 to the PBCH#7, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#4 to the PBCH#7.

[0332] In FIG. 24, the PSS and the SSS occupy continuous symbols, the bandwidth of the PSS is the same as or close to that of the PBCH#0, and the bandwidth of the SSS is greater than that of the PSS, for example, the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3, thereby improving the detection performance of the SSS without increasing the PSS blind detection complexity.

[0333] In some embodiments, the SSBs occupying continuous frequency domain resources and different time domain resources form a SSB grid, and the terminal device performs detection of the SSBs on different SSB grids to determine the frequency domain positions of the SSBs.

[0334] In some embodiments, the terminal device performs blind detection of the PSS on the transmission resources of the PSS on each grid; after detecting the PSS, the terminal device performs detection of the corresponding SSS on the same time domain resources or frequency domain resources; according to the correspondence between the time-frequency resource positions of the PSS or SSS and the time-frequency resource positions of the plurality of PBCHs, the terminal device determines the resource positions of the plurality of PBCHs; the terminal device respectively detects the PBCHs on the resource positions of the PBCHs; after successfully demodulating a certain PBCH, the terminal device completes initial synchronization with the network device.

[0335] Optionally, the terminal device continues to perform detection of other synchronization channels to determine an SSB with the highest reception strength, which is used to determine the transmission resources of the PRACH.

[0336] For the method of determining the SSB index:

[0337] In some embodiments, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0338] For specific implementation details, refer to the description in Case One, which will not be repeated here.

[0339] For Case Three: the synchronization signal includes a plurality of PSSs and a plurality of SSSs.

[0340] The plurality of PSSs and the plurality of SSSs correspond to the plurality of synchronization channels one by one. Each SSB includes a PSS, an SSS, and a PBCH (synchronization channel), and the plurality of SSBs use frequency division multiplexing for transmission.

[0341] In some embodiments, the plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

[0342] In some embodiments, the PSS, the SSS, and the PBCH included in the same SSB are transmitted through the same beam, and different SSBs use different transmission beams.

[0343] For the frequency domain resource positions of the synchronization signal and the frequency domain resource positions of the plurality of synchronization channels:

[0344] In some embodiments, the frequency domain resource positions of the synchronization signal and the frequency domain resource positions of the plurality of synchronization channels have a fixed correspondence.

[0345] In some embodiments, in the case that the synchronization signal includes multiple PSSs and multiple SSSs, each PSS, each SSS and each synchronization channel are one-to-one corresponding, the fixed correspondence between the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels includes: the frequency points of the one-to-one corresponding PSS, SSS and synchronization channel are the same.

[0346] FIG. 26 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. In the figure, the white blocks represent SSBs, including PSSs, SSSs and PBCHs.

[0347] Multiple SSBs form an SSB group. Taking the number of SSBs contained in each SSB group as an example, 4, multiple time division multiplexing SSB groups are contained in an SSB transmission window, and different SSB groups occupy different time domain resources and are transmitted using different beams.

[0348] In FIG. 26, multiple SSBs use frequency division multiplexing for multiplexing, occupying the same symbol and continuous bandwidth. For example, SSB#0 to SSB#3 occupy the same symbol and continuous bandwidth, or SSB#4 to SSB#7 occupy the same symbol and continuous bandwidth.

[0349] In FIG. 27, in each SSB of an SSB group, the frequency points of the one-to-one corresponding PSS, SSS and PBCH are the same, for example, the frequency points of PSS#1, SSS#1 and PBCH#1 are the same.

[0350] For the method of determining the SSB index:

[0351] In some embodiments, the SSB index of each synchronization channel in the multiple synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0352] For specific implementation details, refer to the description in Case 1, which will not be repeated here.

[0353] For any one of the above three cases, the terminal device receives SSB measurement configuration:

[0354] In some embodiments, the method further includes receiving SSB measurement configuration, the SSB measurement configuration being used to indicate the resource position of the SSB to be detected by the terminal device; wherein the SSB measurement configuration includes multiple bits, each bit of the multiple bits corresponding to an SSB group, the value of each bit being used to indicate whether to detect the SSB group corresponding to the current bit, the SSB group containing multiple synchronization channels; or, the SSB measurement configuration includes indication information of the SSB group and indication information of the synchronization channel, the indication information of the synchronization channel being used to indicate the position of the target synchronization channel in the SSB group, the SSB group containing multiple synchronization channels.

[0355] In the case that the SSB measurement configuration includes multiple bits, each bit of the multiple bits corresponds to one SSB group, when the bit takes the value of 1, it indicates that the SSB group is transmitted, and the terminal device can detect the SSB group; when the bit takes the value of 0, the terminal device does not need to detect the SSB group.

[0356] In some embodiments, the SSB measurement configuration is carried by SIB or PBCH.

[0357] In the case of carrying by PBCH, the terminal device determines the transmitted SSB according to the SSB measurement configuration, so as to decide whether to detect.

[0358] In the case that the SSB measurement configuration includes the indication information of the SSB group and the indication information of the synchronization channel, the indication information of the SSB group is used to indicate one SSB group, and the indication information of the synchronization channel is used to indicate the position of the target synchronization channel in the SSB group. After receiving the SSB measurement configuration, the terminal device performs SSB measurement on the resource position of the SSB indicated by the SSB measurement configuration, and reports the measurement result (such as RSRP or SINR) according to the indication of the network device.

[0359] In some embodiments, the SSB measurement configuration is indicated by the CSI measurement resource configuration of the RRC signaling, wherein the CSI measurement resource can contain multiple SSB measurement configurations, and each SSB measurement configuration indicates one SSB. The measurement result is obtained based on SSS or DMRS, rather than PSS.

[0360] For any one of the above three cases, the terminal device performs PRACH transmission.

[0361] In some embodiments, the method further includes: measuring multiple synchronization channels to obtain measurement results of the multiple synchronization channels; determining a target synchronization channel according to the measurement results of the multiple synchronization channels; and performing corresponding PRACH transmission according to the target synchronization channel; wherein performing corresponding PRACH transmission according to the target synchronization channel includes:

[0362] The PRACH transmission is performed through the PRACH transmission resource and the preamble sequence corresponding to the target synchronization channel. The multiple synchronization channels correspond to the same PRACH transmission resource, and each of the multiple synchronization channels corresponds to a preamble sequence on the PRACH transmission resource.

[0363] In some embodiments, the target synchronization channel is a target SSB, and the target SSB is an SSB with the highest received signal strength (RSRP) among SSBs satisfying an RSRP threshold.

[0364] Case one: The PRACH transmission is performed through the PRACH transmission resource and the preamble sequence corresponding to the target synchronization channel.

[0365] In some embodiments, each SSB group (synchronization channel group) corresponds to the same PRACH transmission resource, and each synchronization channel in the SSB group corresponds to a preamble sequence on the PRACH transmission resource, that is, the frequency division multiplexed synchronization channels are distinguished by the preamble sequence. For different SSB groups that are time division multiplexed, the same PRACH transmission resource can be used, so that the PRACH transmission resources of different SSB groups are also distinguished by the preamble sequence; or different PRACH transmission resources can also be used.

[0366] Case two: The PRACH transmission is performed through the PRACH transmission resource corresponding to the target synchronization channel.

[0367] In some embodiments, the multiple synchronization channels correspond to different PRACH transmission resources on the same symbol, and the terminal device performs the PRACH transmission through the PRACH transmission resource corresponding to the target synchronization channel.

[0368] Case three: The PRACH transmission resource is determined according to the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and the PRACH transmission is performed through the PRACH transmission resource.

[0369] In some embodiments, each PRACH transmission resource has a preset mapping relationship with the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and the SSB group includes multiple synchronization channels. The mapping relationship is shown in Table Two.

[0370] Table II

[0371] In some embodiments, the terminal device determines the PRACH transmission resource corresponding to the target synchronization channel according to a preset mapping relationship.

[0372] For example, the index of the SSB group is 0, the frequency domain position index of the target synchronization channel is 1, and the PRACH transmission resource corresponding to the target synchronization channel is determined to be RO2 according to the preset mapping relationship.

[0373] To sum up, the method provided in the embodiment receives a synchronization signal and a plurality of synchronization channels associated with the synchronization signal, wherein the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources, and the SSB includes the synchronization signal and the plurality of synchronization channels, thereby reducing the number of time domain resources occupied when the SSB is transmitted, improving the flexibility of resource scheduling. At the same time, the transmission window of the SSB can be shortened, and the time of RRM measurement can be reduced.

[0374] In the above embodiments, the embodiment corresponding to FIG. 7 and the embodiment corresponding to FIG. 28 can be implemented independently or in combination, which is not limited in the present application.

[0375] FIG. 29 shows a block diagram of a signal sending device provided in an example embodiment of the present application. The device can be implemented as a network device or a part of a network device through software or hardware or a combination of both. The device includes at least one of a sending module 2910 and a receiving module 2920.

[0376] The sending module 2910 is configured to send a synchronization signal including one or more PSS, and send a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels including a PBCH, wherein the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources.

[0377] In a possible design of the embodiment, the SSB includes a synchronization signal and a synchronization channel, wherein the synchronization signal includes a PSS and a SSS, and the synchronization channel includes a PBCH; or, the synchronization signal includes a PSS, and the synchronization channel includes a SSS and a PBCH.

[0378] In a possible design of the embodiment, the synchronization channel associated with the synchronization signal is a synchronization channel adjacent to the synchronization signal in the time domain, or a synchronization channel identical to the synchronization signal in the frequency domain, or a synchronization channel belonging to the same SSB as the synchronization signal.

[0379] In a possible design of the embodiment, the number of the plurality of synchronization channels is determined according to a frequency band in which the synchronization channels are located, and / or a subcarrier spacing used for transmitting the synchronization channels; or, the number of the plurality of synchronization channels is determined according to first information carried by the synchronization channels, the first information being used to indicate the number of the plurality of synchronization channels.

[0380] The signal sending apparatus and the terminal device agree in advance that the number M of the synchronization channels corresponding to different frequency bands and / or subcarrier spacings. For example, the higher the frequency band, the greater the number of the synchronization channels. For example, when the frequency band is lower than a first threshold frequency band, the number M of the synchronization channels is 4; when the frequency band is higher than the first threshold frequency band, the number M of the synchronization channels is 8.

[0381] Alternatively, each synchronization channel carries first information occupying n bits, and the number of the synchronization channels is indicated by the first information. For example, when n=2, the first information can indicate a maximum of 4 synchronization channels, and when n=3, the first information can indicate a maximum of 8 synchronization channels. In an embodiment, the n bits can be carried by the synchronization channel, or part of the bits can be carried by the DMRS sequence of the synchronization channel.

[0382] In a possible design of the embodiment, there is a frequency domain guard interval between the plurality of synchronization channels. For example, a fixed number of subcarriers are used as the frequency domain guard interval, to prevent signal leakage between different synchronization channels.

[0383] In a possible design of the embodiment, the plurality of synchronization channels are sent through different beams. FIG. 8 shows a schematic diagram of a sending beam according to an example embodiment of the present application. Taking a synchronization signal including one PSS, the synchronization channel including SSS and PBCH, and the number of the synchronization channels being 4 as an example, one PSS corresponds to four synchronization channels, PSS1 corresponds to synchronization channel 1 to synchronization channel 4, and PSS2 corresponds to synchronization channel 5 to synchronization channel 8.

[0384] Different synchronization channels are sent through different beams, for example, synchronization channel 1 is sent through beam 801, synchronization channel 2 is sent through beam 802, synchronization channel 3 is sent through beam 803, and synchronization channel 4 is sent through beam 804.

[0385] FIG. 9 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. The synchronization signal includes one PSS, the synchronization channel includes SSS and PBCH, and the number of synchronization channels is 4 as an example. Since the PSS is common, one synchronization channel can also be referred to as one SSB. Each SSB occupies time domain resources X1, and the synchronization signal occupies time domain resources Y2. Therefore, the total time domain resources occupied by the method for transmitting the synchronization signal and SSB 1 to SSB 4 is X1+Y2. The four SSBs in FIG. 9 and the four SSBs in the related art of FIG. 5 are also transmitted by four beams. The total time domain resources required for transmitting SSB 1 to SSB 4 in the related art is 4X1+3Y1, and the method occupies less time domain resources Z=3X1+3Y1-Y2 compared with the related art. In general, Z is greater than 0.

[0386] In a possible design of the embodiment, the content contained in the synchronization signal includes at least one of the following cases:

[0387] Case 1: The synchronization signal includes one PSS; Case 2: The synchronization signal includes one PSS and one SSS; and Case 3: The synchronization signal includes multiple PSSs and multiple SSSs.

[0388] For Case 1: The synchronization signal includes one PSS.

[0389] Each synchronization channel further includes an SSS, i.e., each synchronization channel includes an SSS and a PBCH. In the embodiment, since the PSS is common, one synchronization channel can also be referred to as one SSB.

[0390] In a possible design of the embodiment, the PBCH includes a DMRS, which is used for demodulation of the PBCH and can also be used for measurement of cell or beam signal strength / signal quality.

[0391] In a possible design of the embodiment, multiple synchronization channels occupying the same time domain resources and different frequency domain resources form one SSB group, and one SSB transmission window contains multiple SSB groups. Different SSB groups can occupy different time domain resources and are transmitted by different beams.

[0392] In a possible design of the embodiment, multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0393] For example, the bandwidth of each synchronization channel is 20 PRBs, and the multiple synchronization channels occupy adjacent and continuous multiple 20 PRBs.

[0394] For the beam for transmitting the PSS and the synchronization channel:

[0395] In a possible design of the embodiment, the SSS and the PBCH belonging to the same synchronization channel are transmitted through the same beam, and the PSS and the multiple synchronization channels are transmitted through different beams.

[0396] As shown in FIG. 8, taking the number of synchronization channels as 4 as an example, one PSS corresponds to four synchronization channels, PSS1 corresponds to synchronization channel 1 to synchronization channel 4, and PSS2 corresponds to synchronization channel 5 to synchronization channel 8.

[0397] The SSS and the PBCH belonging to the same synchronization channel are transmitted through the same beam, for example, SSS1 and PBCH 1 both belong to synchronization channel 1, and SSS1 and PBCH 1 are transmitted through the same beam 801; the PSS and the multiple synchronization channels are transmitted through different beams, for example, PSS1 is transmitted through beam 810, and synchronization channel 1 is transmitted through beam 801; the SSS and the PBCH belonging to different synchronization channels are transmitted through different beams, for example, SSS1 and PBCH 1 both belong to synchronization channel 1, SSS2 and PBCH 2 both belong to synchronization channel 2, SSS3 and PBCH 3 both belong to synchronization channel 3, and SSS4 and PBCH 2 both belong to synchronization channel 4, synchronization channel 1 is transmitted through beam 801, synchronization channel 2 is transmitted through beam 802, synchronization channel 3 is transmitted through beam 803, and synchronization channel 4 is transmitted through beam 804.

[0398] In a possible design of the embodiment, the beam width of the beam used to transmit the PSS is greater than the beam width of the beam used to transmit the multiple synchronization channels.

[0399] In a possible design of the embodiment, the direction of the beam used to transmit the PSS includes the direction of the beam used to transmit the multiple synchronization channels.

[0400] As shown in FIG. 8, beam 810 used to transmit PSS1 is a wide beam, and the beams used to transmit the multiple synchronization channels are narrow beams, for example, beam 801 used to transmit synchronization channel 1 is a narrow beam, the beam width of beam 810 is greater than the beam width of beam 801, and the direction of beam 810 includes the directions of beams 801 to 804, and beams 801 to 804 are respectively used to transmit synchronization channel 1 to synchronization channel 4.

[0401] Based on the above manner, the PSS using a wide beam can cover a larger range, and because the detection threshold of the PSS is low, more terminal devices can detect the synchronization signal. The synchronization channel using a narrow beam can obtain greater beamforming gain, thereby improving the detection performance of the PBCH.

[0402] The frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence relationship.

[0403] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence relationship.

[0404] In a possible design of the embodiment, in the case where the synchronization signal includes one PSS, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence relationship, including at least one of the following: the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; and the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels.

[0405] FIG. 10 and FIG. 11 respectively show schematic diagrams of a synchronization signal and a synchronization channel transmission method provided by an example embodiment of the present application, where a white square block represents a synchronization channel, including an SSS and a PBCH, and a square block filled with diagonal lines represents a PSS.

[0406] Taking the number of synchronization channels as 4 as an example, that is, one PSS corresponds to four synchronization channels, an SSB represents one synchronization channel, and a plurality of synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources for transmission.

[0407] In FIG. 10, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB #10 or SSB #14; and for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB #N0 or SSB #N4.

[0408] Optionally, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels, for example, for SSB grid 1, the frequency point of the PSS is the same as the frequency point of SSB #13 or SSB #17; and for SSB grid N, the frequency point of the PSS is the same as the frequency point of SSB #N3 or SSB #N7.

[0409] In FIG. 11, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, that is, the PSS is at the center position of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS is in the middle of the frequency point of SSB #1 and the frequency point of SSB #2, or in the middle of the frequency point of SSB #5 and the frequency point of SSB #6.

[0410] In a possible design of the embodiment, the bandwidth of the synchronization signal is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0411] FIG. 12 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. Taking the number of synchronization channels as 4 as an example, one PSS corresponds to 4 synchronization channels, and SSB represents one synchronization channel. The bandwidth of the PSS is equal to the sum of the bandwidths of the 4 synchronization channels. The PSS is transmitted using a larger bandwidth, and the synchronization channels are transmitted using a smaller bandwidth, thereby improving the detection performance of the PSS.

[0412] In a possible design of the present embodiment, an SSB grid includes SSBs occupying continuous frequency domain resources and different time domain resources in one frequency band. The terminal device needs to detect the SSBs on different SSB grids to determine the frequency domain positions of the SSBs.

[0413] As shown in FIG. 10, SSB grid 1 includes SSB#10 to SSB#17, wherein SSB#10 to SSB#13 occupy the same time domain resources, SSB#14 to SSB#17 occupy the same time domain resources, SSB#10 and SSB#14 occupy different time domain resources, and SSB#10 to SSB#13 and SSB#14 to SSB#17 occupy the same continuous frequency domain resources.

[0414] SSB grid N includes SSB#N0 to SSB#N7, wherein SSB#N0 to SSB#N3 occupy the same time domain resources, SSB#N4 to SSB#N7 occupy the same time domain resources, SSB#N0 and SSB#N4 occupy different time domain resources, and SSB#N0 to SSB#N3 and SSB#N4 to SSB#N7 occupy the same continuous frequency domain resources.

[0415] For the multiplexing manner of SSS and PBCH:

[0416] In a possible design of the present embodiment, the frequency point of the PBCH is the same as that of the corresponding SSS, the bandwidth of the PBCH is greater than that of the SSS, and the PBCH is transmitted on both sides of the SSS.

[0417] FIGS. 13 to 15 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application.

[0418] The synchronization channel includes SSS and PBCH. Taking the number of synchronization channels as 4 as an example, in FIG. 13, the frequency point of the PSS is the same as that of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS is the same as that of the synchronization channel corresponding to PBCH#0.

[0419] In FIG. 14, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, for example, the frequency point of the PSS is in the middle of the frequency point of the synchronization channel corresponding to PBCH#1 and the frequency point of the synchronization channel corresponding to PBCH#2.

[0420] In FIG. 15, the bandwidth of the PSS is equal to the sum of the bandwidths of the plurality of synchronization channels, for example, the bandwidth of the PSS is equal to the sum of the bandwidths of the synchronization channel corresponding to PBCH#0 to the synchronization channel corresponding to PBCH#3.

[0421] For the method of determining the SSB index:

[0422] In a possible design of the embodiment, the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources, and carry the same SSB index indication information.

[0423] Since the plurality of synchronization channels carry the same SSB index indication information and MIB, the information bits carried by the plurality of synchronization channels are completely the same.

[0424] In a possible design of the embodiment, the SSB index indication information is carried by the PBCH and / or the DMRS of the PBCH in the synchronization channel.

[0425] In a possible design of the embodiment, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0426] In a possible design of the embodiment, the determination method includes at least one of the following three methods:

[0427] Method one: The SSB index indication information indicates the SSB index of a first synchronization channel in the plurality of synchronization channels, and the SSB index of the other synchronization channels except the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain positions of the other synchronization channels.

[0428] In a possible design of the embodiment, the first synchronization channel is the synchronization channel with the lowest frequency point or the synchronization channel with the highest frequency point in the plurality of synchronization channels.

[0429] In a possible design of the embodiment, the frequency domain position of the synchronization channel is used to determine a first index value, and the first index value is an index value obtained by arranging the plurality of synchronization channels in a specified order according to the corresponding frequency points.

[0430] As shown in FIG. 11, the first synchronization channel is the synchronization channel with the lowest frequency point among the multiple synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus the first index value n, where n is the index value of the multiple synchronization channels arranged in the order from low to high in frequency point, i.e., the synchronization channel with the lowest frequency point n=0 (SSB#0 or SSB#4), the second-lowest synchronization channel n=1 (SSB#1 or SSB#5), and so on.

[0431] As shown in FIG. 12, the first synchronization channel is the synchronization channel with the highest frequency point among the multiple synchronization channels, i.e., SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus the first index value n, where n is the index value of the multiple synchronization channels arranged in the order from high to low in frequency point, i.e., the synchronization channel with the highest frequency point n=0 (SSB#0 or SSB#4), the second-highest synchronization channel n=1 (SSB#1 or SSB#5), and so on.

[0432] The SSB index indication information can indicate values of k*M (k=0, 1, 2, …, N / M-1), and X1 bits of information are used to represent the values, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, M is the number of the multiple synchronization channels using frequency division multiplexing, N and M are positive integers, and N is greater than or equal to M.

[0433] For example, in FIG. 11, N=8, M=4, and k=0, 1, so the SSB index indication information can indicate values of 0 and 4, and 1 bit of information is used to represent the values.

[0434] Method two: The SSB index indication information indicates the index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and the frequency domain position of each synchronization channel, where the SSB group contains multiple synchronization channels.

[0435] In a possible design of the embodiment, the SSB index indication information indicates the index of the SSB group as k (k=0, 1, 2, …, N / M-1), and X1 bits of information are used to represent the index, and the SSB index of each synchronization channel is K=k*M+n, where X1 is the upward rounding value of log2(N / M), N is the total number of candidate SSBs, M is the number of the multiple synchronization channels, N and M are positive integers, N is greater than or equal to M, and n is the index value of the multiple synchronization channels arranged in the order from low to high (or from high to low) in frequency point.

[0436] For example, in FIG. 11, N=8, M=4, k=0, 1, 1-bit information is used for representation, wherein SSB#0 corresponds to SSB index K0=0*4+0=0, SSB#1 corresponds to SSB index K1=0*4+1=1, SSB#4 corresponds to SSB index K4=1*4+0=4, SSB#5 corresponds to SSB index K5=1*4+1=5, and so on.

[0437] Method three: in a possible design of the embodiment, the SSB index is determined according to X-bit second information, the first X1 bits of the second information are indicated by the SSB index indication information, and the last X2 bits of the second information are determined by the frequency domain position of the synchronization channel.

[0438] wherein X is the upward rounding value of log2(N), X1 is the upward rounding value of log2(N / M), X2 is the upward rounding value of log2(M), N is the total number of candidate SSBs, M is the number of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

[0439] In a possible design of the embodiment, the last X2 bits correspond to the value of the first index value n, and n is the index value obtained by arranging the synchronization channels in the order from low to high (or from high to low) according to the frequency points.

[0440] For example, in FIG. 11, N=8, M=4, the SSB index is determined according to 3-bit second information, the first log2(8 / 4)=1 bit of the second information is indicated by the SSB index indication information, and the last log2(4)=2 bit of the second information is determined by the first index value n. For example, for SSB#0, the SSB index indication information indicates that the first 1 bit of the second information is 0, the first index value n is 0, so the last 2 bits of the second information are 00, and the second information is 000; for SSB#5, the SSB index indication information indicates that the first 1 bit of the second information is 1, the first index value n is 1, so the last 2 bits of the second information are 01, and the second information is 101.

[0441] In a possible design of the embodiment, the SSBs (synchronization channels) using frequency division multiplexing and the SSBs (synchronization channels) using time division multiplexing in one SSB synchronization period correspond to different SSB indexes. For example, the SSB index arrangement mode of first frequency domain and then time domain can be used, as shown in FIG. 10 and FIG. 11. The SSBs using different indexes are transmitted by using different beams, so as to cover the entire cell through scanning of multiple beams. Since the SSB multiplexing mode using frequency division multiplexing and time division multiplexing is combined, more SSBs can be supported in the same SSB transmission window.

[0442] In the method, since the frequency domain position of the synchronization channel is known, the SSB index indication information only needs to indicate part of the SSB index information, thereby compared with directly indicating the SSB index, the information bits carried by the synchronization channel can be reduced, and the detection performance of the SSB is improved.

[0443] For case two, the synchronization signal includes one PSS and one SSS.

[0444] In a possible design of the embodiment, the PSS and the SSS are transmitted on the same time domain resource and different frequency domain resources; or, the PSS and the SSS are transmitted on different time domain resources and the same frequency domain resources.

[0445] In a possible design of the embodiment, the plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

[0446] For the beams for transmitting the synchronization signal and the synchronization channel:

[0447] In a possible design of the embodiment, the PSS and the SSS are transmitted through the same beam, and the PSS and the PBCH are transmitted through different beams.

[0448] In a possible design of the embodiment, the PBCHs belonging to different synchronization channels are transmitted through different beams.

[0449] FIG. 16 shows a schematic diagram of a transmission beam provided in an example embodiment of the present application. Taking the number of synchronization channels as 4 as an example, that is, one PSS and one SSS correspond to four PBCHs, PSS1 and SSS1 correspond to PBCH 1 to PBCH 4, and PSS2 and SSS2 correspond to PBCH 5 to PBCH 8.

[0450] The PSS and the SSS are transmitted through the same beam, for example, PSS1 and SSS1 are transmitted through the same beam 1610, and PSS2 and SSS2 are transmitted through the same beam 1620; the PSS and the PBCH are transmitted through different beams, for example, PSS1 is transmitted through the beam 1610, and PBCH 1 is transmitted through the beam 1601; the PBCHs belonging to different synchronization channels are transmitted through different beams, for example, PBCH 1 is transmitted through the beam 1601, PBCH 2 is transmitted through the beam 1602, PBCH 3 is transmitted through the beam 1603, and PBCH 4 is transmitted through the beam 1604.

[0451] In a possible design of the embodiment, the beam width of the beam for transmitting the PSS and the SSS is greater than the beam width of the beam for transmitting the PBCH.

[0452] In a possible design of the embodiment, the direction of the beam for transmitting the PSS and the SSS includes the direction of the beam for transmitting the PBCH.

[0453] As shown in FIG. 16, the beam 1610 for transmitting the PSS1 and the SSS1 is a wide beam, and the beams for transmitting the PBCHs are narrow beams, for example, the beam 1601 for transmitting the PBCH1 is a narrow beam, the beam width of the beam 1610 is greater than that of the beam 1601, and the direction of the beam 1610 includes the directions of the beams 1601 to 1604, which are respectively used for transmitting the PBCH1 to the PBCH4.

[0454] Based on the above manner, the PSS and the SSS can cover a larger range, and more terminal devices can detect the synchronization signals due to the low detection threshold of the PSS. The narrow beams used for the synchronization channels can obtain greater beamforming gain, thereby improving the detection performance of the PBCH.

[0455] The frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels:

[0456] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence.

[0457] In a possible design of the embodiment, in the case where the synchronization signal includes one PSS and one SSS, the plurality of synchronization channels form one SSB group, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence, and the correspondence includes at least one of the following:

[0458] The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the center frequency point of the plurality of synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; and the PSS and the SSS are distributed on any one side of the SSB group.

[0459] FIGS. 17 and 18 respectively show schematic diagrams of the synchronization signal and the synchronization channel transmission method provided in an example embodiment of the present application. The white squares represent the PBCH, the squares filled with the right-up-to-left-down diagonal line represent the PSS, and the squares filled with the left-up-to-right-down diagonal line represent the SSS.

[0460] Taking the number of PBCHs as 4 for example, one PSS and one SSS correspond to four synchronization channels (PBCHs), the plurality of synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0461] In FIG. 17, the PSS and the SSS adopt a multiplexing manner of time division multiplexing, occupying continuous symbols and the same bandwidth. The frequency point of the PSS and the SSS is the same as that of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as that of the PBCH#0 or the PBCH#4.

[0462] Optionally, the frequency point of the PSS and the SSS is the same as that of the synchronization channel with the highest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as that of the PBCH#3 or the PBCH#7.

[0463] In FIG. 18, the PSS and the SSS adopt a multiplexing manner of time division multiplexing, occupying continuous symbols and the same bandwidth. The frequency point of the PSS and the SSS is the same as that of the center frequency of the plurality of synchronization channels, that is, the PSS and the SSS are in the center position of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS and the SSS is in the middle of the frequency point of the PBCH#1 and the frequency point of the PBCH#2, or in the middle of the frequency point of the PBCH#5 and the frequency point of the PBCH#6.

[0464] FIGS. 19 to 21 respectively show schematic diagrams of a synchronization signal and a synchronization channel transmission method provided by an example embodiment of the present application. Wherein, the white square represents the PBCH, the square filled with the right-up to left-down diagonal line represents the PSS, and the square filled with the left-up to right-down diagonal line represents the SSS.

[0465] Taking the number of PBCHs as 4 for example, that is, one PSS and one SSS correspond to four synchronization channels (PBCHs), and the plurality of synchronization channels form an SSB group, different SSB groups can occupy different time domain resources and adopt different beams for transmission.

[0466] In FIG. 19, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, occupying the same symbol and continuous bandwidth. The PSS and the SSS are distributed on any side (upper side or lower side) of the SSB group, for example, the frequency point of the PSS is the same as that of the PBCH#0 or the PBCH#4, and the frequency point of the SSS is the same as that of the PBCH#1 or the PBCH#5.

[0467] In FIG. 20, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, occupying the same symbol and continuous bandwidth. The PSS and the SSS are distributed in the middle of the SSB group, for example, the frequency point of the PSS is the same as that of the PBCH#1, and the frequency point of the SSS is the same as that of the PBCH#2.

[0468] In FIG. 21, the PSS and the SSS adopt a multiplexing manner of frequency division multiplexing, occupy the same symbol and continuous bandwidth. The PSS and the SSS are distributed on both sides of the SSB group, for example, the frequency point of the PSS is the same as that of the PBCH#0, and the frequency point of the SSS is the same as that of the PBCH#3.

[0469] The PSS and the SSS adopt the multiplexing manner of frequency division multiplexing, which can reduce the time domain resource occupied by the synchronization signal, thereby improving the flexibility of scheduling of other signals.

[0470] In a possible design of the embodiment, the sum of the bandwidths of the PSS and the SSS is equal to the sum of the bandwidths of the plurality of synchronization channels.

[0471] FIGS. 22 to 24 respectively show schematic diagrams of a synchronization signal and a synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, the white square represents the PBCH, the square filled with the right-up-to-left-down diagonal line represents the PSS, and the square filled with the left-up-to-right-down diagonal line represents the SSS.

[0472] Taking the number of PBCHs as 4 for example, one PSS and one SSS correspond to four synchronization channels (PBCHs), a plurality of synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0473] In FIG. 22, the PSS and the SSS occupy the same symbol and continuous bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#0 and the PBCH#1, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#2 and the PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#4 and the PBCH#5, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#6 and the PBCH#6.

[0474] In FIG. 23, the PSS and the SSS occupy continuous symbols and the same bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of the PBCH#4 to the PBCH#7, and the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#4 to the PBCH#7.

[0475] In FIG. 24, the PSS and the SSS occupy continuous symbols, the bandwidth of the PSS is the same as or close to that of the PBCH#0, and the bandwidth of the SSS is greater than that of the PSS, for example, the bandwidth of the SSS is the same as the sum of the bandwidths of the PBCH#0 to the PBCH#3, thereby improving the detection performance of the SSS without increasing the PSS blind detection complexity.

[0476] For the method of determining the SSB index:

[0477] In a possible design of the embodiment, the SSB index of each of the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0478] The specific implementation details are described in the case 1, which will not be repeated here.

[0479] For case 3: the synchronization signal includes a plurality of PSSs and a plurality of SSSs.

[0480] The plurality of PSSs and the plurality of SSSs correspond to the plurality of synchronization channels one by one. Each SSB includes one PSS, one SSS, and one PBCH (synchronization channel), and the plurality of SSBs use frequency division multiplexing transmission.

[0481] In a possible design of the embodiment, the plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

[0482] For the beam for transmitting the synchronization signal and the synchronization channel:

[0483] In a possible design of the embodiment, the PSS, the SSS, and the PBCH contained in the same SSB are transmitted through the same beam.

[0484] In a possible design of the embodiment, different SSBs are transmitted through different beams.

[0485] FIG. 25 shows a schematic diagram of a transmitting beam provided by an example embodiment of the present application, where PSS1, SSS1, and PBCH 1 belong to SSB 1, and PSS2, SSS2, and PBCH 2 belong to SSB 2.

[0486] The PSS, the SSS, and the PBCH contained in the same SSB are transmitted through the same beam, for example, PSS1, SSS1, and PBCH 1 are all transmitted through beam 2510, and PSS2, SSS2, and PBCH 2 are all transmitted through beam 2520.

[0487] Different SSBs are transmitted through different beams, for example, SSB 1 is transmitted through beam 2510, and SSB 2 is transmitted through beam 2520.

[0488] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels:

[0489] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed correspondence.

[0490] In a possible design of the embodiment, in a case where the synchronization signal includes multiple PSSs and multiple SSSs, each PSS, each SSS, and each synchronization channel are in one-to-one correspondence, the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the multiple synchronization channels, including: the frequency points of the PSS, the SSS, and the synchronization channel in one-to-one correspondence are the same.

[0491] FIG. 26 shows a schematic diagram of a synchronization signal and synchronization channel transmission method according to an example embodiment of the present application. In the figure, the white blocks represent SSBs, including PSSs, SSSs, and PBCHs.

[0492] Multiple SSBs form an SSB group. Taking the number of SSBs included in each SSB group as an example, four SSBs, multiple time division multiplexing SSB groups are included in one SSB transmission window, and different SSB groups occupy different time domain resources and are transmitted by using different beams.

[0493] In FIG. 26, multiple SSBs use a frequency division multiplexing multiplexing manner, and occupy the same symbol and continuous bandwidth. For example, SSB#0 to SSB#3 occupy the same symbol and continuous bandwidth, or SSB#4 to SSB#7 occupy the same symbol and continuous bandwidth.

[0494] In FIG. 27, in each SSB of one SSB group, the frequency points of the PSS, the SSS, and the PBCH in one-to-one correspondence are the same, for example, the frequency points of PSS#1, SSS#1, and PBCH#1 are the same.

[0495] For the method of determining the SSB index:

[0496] In a possible design of the embodiment, the SSB index of each synchronization channel in the multiple synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0497] For specific implementation details, refer to the description in Case 1, which will not be repeated here.

[0498] For any one of the above three cases, the signal sending device sends SSB measurement configuration:

[0499] In a possible design of the embodiment, the sending module 2910 is further configured to send SSB measurement configuration, the SSB measurement configuration being used to indicate the resource position of the SSB to be detected by the terminal device.

[0500] The SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponds to an SSB group, and a value of each bit is used to indicate whether the terminal device detects the SSB group corresponding to the current bit, and the SSB group contains a plurality of synchronization channels; or the SSB measurement configuration includes indication information of an SSB group and indication information of a synchronization channel, the indication information of the synchronization channel is used to indicate a position of a target synchronization channel in the SSB group, and the SSB group contains a plurality of synchronization channels.

[0501] In a case where the SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponds to an SSB group, when the signal sending device sends the SSB group, the bit value is 1, indicating that the terminal device can detect the SSB group; and when the signal sending device does not send the SSB group, the bit value is 0, indicating that the terminal device does not need to detect the SSB group.

[0502] In a possible design of the embodiment, the SSB measurement configuration is carried by a system information block (SIB) or a PBCH.

[0503] In a case where the SSB measurement configuration includes indication information of an SSB group and indication information of a synchronization channel, the indication information of the SSB group is used to indicate an SSB group, and the indication information of the synchronization channel is used to indicate a position of a target synchronization channel in the SSB group. By this method, the signal sending device indicates a position of an SSB resource that the terminal device currently needs to measure and report a measurement result, so as to obtain corresponding downlink channel information such as beam quality information. For example, the signal sending device indicates the SSB measurement configuration by channel state information (CSI) measurement resource, and instructs the terminal device to report reference signal receiving power (RSRP) or signal to interference plus noise ratio (SINR) based on the measured SSB.

[0504] In a possible design of the embodiment, the SSB measurement configuration is a CSI measurement resource configuration indicated by radio resource control (RRC) signaling.

[0505] For any one of the above three cases, the signal sending device determines a target synchronization channel:

[0506] In a possible design of the embodiment, the receiving module 2920 is configured to receive a PRACH, and determine a corresponding target synchronization channel according to the PRACH.

[0507] The multiple synchronization channels correspond to a same PRACH transmission resource, and each of the multiple synchronization channels corresponds to a preamble sequence on the PRACH transmission resource.

[0508] The multiple synchronization channels correspond to different PRACH transmission resources on a same time domain resource.

[0509] The PRACH transmission resource and an index of a SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel in the SSB group have a preset mapping relationship, and the SSB group includes the multiple synchronization channels.

[0510] Case one: The multiple synchronization channels correspond to a same PRACH transmission resource, and each of the multiple synchronization channels corresponds to a preamble sequence on the PRACH transmission resource.

[0511] In a possible design of the embodiment, each SSB group (synchronization channel group) corresponds to a same PRACH transmission resource, and each synchronization channel in the SSB group corresponds to a preamble sequence on the PRACH transmission resource, that is, the frequency division multiplexed synchronization channels are distinguished by the preamble sequences. For the time division multiplexed different SSB groups, a same PRACH transmission resource can be corresponded, so that the PRACH transmission resources of the different SSB groups are also distinguished by the preamble sequences; or different PRACH transmission resources can also be corresponded.

[0512] Case two: The multiple synchronization channels correspond to different PRACH transmission resources on a same time domain resource.

[0513] In a possible design of the embodiment, the multiple synchronization channels correspond to different PRACH transmission resources on a same symbol, and the signal sending device determines the target synchronization channel according to a PRACH transmission resource in which the received PRACH is located.

[0514] Case three: The PRACH transmission resource and an index of a SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel in the SSB group have a preset mapping relationship.

[0515] In a possible design of the embodiment, each PRACH transmission resource and an index of a SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel in the SSB group have a preset mapping relationship, and the mapping relationship is shown in Table 1.

[0516] In a possible design of the embodiment, the signal sending device determines an index of a SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel according to a PRACH transmission resource in which the received PRACH is located, and then determines the target synchronization channel.

[0517] For example, the PRACH transmission resource received by the signal sending device is RO2, the index of the SSB group is determined as k=0, the frequency domain position index of the target synchronization channel is determined as n=1, and thus the target synchronization channel is determined.

[0518] In a possible design of the embodiment, the beam for sending the target synchronization channel is a beam for sending subsequent other downlink signals, so that the transmission performance of the subsequent other downlink signals is ensured by using the beam with the optimal quality.

[0519] In the embodiment, the sending module 2910 can be split into at least one sending submodule, and each sending submodule is configured to perform at least one of the sending steps described above. For example, a first sending submodule, a second sending submodule, and a third sending submodule. The first sending submodule is configured to send the synchronization signal, the second sending submodule is configured to send the plurality of synchronization channels associated with the synchronization signal, and the third sending submodule is configured to send the SSB measurement configuration. Alternatively, the first sending submodule is configured to send the plurality of synchronization channels associated with the synchronization signal, the second sending submodule is configured to send the SSB measurement configuration, and the third sending submodule is configured to send the synchronization signal. Alternatively, the first sending submodule is configured to send the SSB measurement configuration, the second sending submodule is configured to send the synchronization signal, and the third sending submodule is configured to send the plurality of synchronization channels associated with the synchronization signal. The embodiment does not limit the functions of the different sending submodules.

[0520] The embodiment takes one sending module 2910 as an example, and the number of the sending module 2910 is not limited. For details of the functions of the sending module 2910, refer to the content of step 710 in the embodiment of FIG. 7. For details of the functions of the receiving module 2920, refer to the content of step 710 in the embodiment of FIG. 7.

[0521] FIG. 30 shows a block diagram of a signal receiving device according to an example embodiment of the present application. The device can be implemented as a terminal device or a part of a terminal device by software or hardware or a combination of both. The device includes at least one of a receiving module 3010, a measuring module 3020, a determining module 3030, and a transmission module 3040.

[0522] The receiving module 3010 is configured to receive a synchronization signal, and the synchronization signal includes one or more PSSs. The receiving module 3010 is further configured to receive a plurality of synchronization channels associated with the synchronization signal, and each of the plurality of synchronization channels includes a PBCH. The plurality of synchronization channels occupy the same time domain resource and different frequency domain resources.

[0523] In a possible design of the embodiment, the SSB includes a synchronization signal and a synchronization channel, where the synchronization signal includes a PSS and an SSS, and the synchronization channel includes a PBCH. Alternatively, the synchronization signal includes a PSS, and the synchronization channel includes an SSS and a PBCH.

[0524] In a possible design of the embodiment, the synchronization channel associated with the synchronization signal is a synchronization channel adjacent to the synchronization signal in the time domain; or, a synchronization channel identical to the synchronization signal in the frequency domain; or, a synchronization channel belonging to the same SSB as the synchronization signal.

[0525] In a possible design of the embodiment, the number of the synchronization channels is determined according to a frequency band in which the synchronization channels are located, and / or a subcarrier spacing used for transmitting the synchronization channels; or, the number of the synchronization channels is determined according to first information carried by the synchronization channels, the first information being used to indicate the number of the synchronization channels.

[0526] The network device and the signal receiving apparatus agree in advance that different frequency bands and / or subcarrier spacings correspond to different numbers of synchronization channels. For example, the higher the frequency band, the greater the number of synchronization channels. For example, when the frequency band is lower than a first threshold frequency band, the number of synchronization channels M=4; when the frequency band is higher than the first threshold frequency band, the number of synchronization channels M=8.

[0527] Alternatively, each synchronization channel carries first information occupying n bits, and the number of synchronization channels is indicated by the first information. For example, when n=2, the first information can indicate a maximum of 4 synchronization channels, and when n=3, the first information can indicate a maximum of 8 synchronization channels. In an implementation, the n bits can be carried by the synchronization channel, or part of the bits can be carried by the DMRS sequence of the synchronization channel.

[0528] In a possible design of the embodiment, there is a frequency domain guard interval between the synchronization channels. For example, a fixed number of subcarriers are used as the frequency domain guard interval, to prevent signal leakage between different synchronization channels.

[0529] In a possible design of the embodiment, the content contained in the synchronization signal includes at least one of the following cases:

[0530] Case 1: The synchronization signal includes one PSS; Case 2: The synchronization signal includes one PSS and one SSS; Case 3: The synchronization signal includes multiple PSSs and multiple SSSs.

[0531] For Case 1: The synchronization signal includes one PSS.

[0532] Each synchronization channel further includes an SSS, that is, each synchronization channel includes an SSS and a PBCH. In this embodiment, since the PSS is common, one synchronization channel can also be referred to as one SSB.

[0533] In a possible design of the embodiment, the PBCH includes a DMRS, the DMRS is used for demodulation of the PBCH, and can also be used for measurement of cell or beam signal strength / signal quality.

[0534] In a possible design of the embodiment, multiple synchronization channels occupying the same time domain resources and different frequency domain resources form one SSB group, and multiple SSB groups are included in one SSB transmission window, and different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0535] In a possible design of the embodiment, the multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0536] For example, the bandwidth of each synchronization channel is 20 PRBs, and the multiple synchronization channels occupy adjacent and continuous multiple 20 PRBs.

[0537] For the relationship between the PSS and the synchronization channel:

[0538] In a possible design of the embodiment, the SSS belonging to the same synchronization channel is quasi co-located (QCL) with the PBCH, and the PSS is non-QCL with the multiple synchronization channels.

[0539] The QCL parameter includes a spatial reception parameter QCL typeD. The signal receiving device can assume that the SSS included in one synchronization channel and the PBCH use the same transmission beam, and the signal receiving device cannot assume that the multiple synchronization channels use the same transmission beam, and needs to receive the multiple synchronization channels based on the assumption of different transmission beams.

[0540] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels:

[0541] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence.

[0542] In a possible design of the embodiment, in the case where the synchronization signal includes one PSS, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence, including at least one of the following:

[0543] The frequency point of the PSS is the same as that of the synchronization channel with the lowest frequency point in the multiple synchronization channels; the frequency point of the PSS is the same as that of the synchronization channel with the highest frequency point in the multiple synchronization channels; and the frequency point of the PSS is the same as the center frequency point of the multiple synchronization channels.

[0544] FIG. 10 and FIG. 11 respectively show a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application, wherein the white square block represents a synchronization channel including SSS and PBCH, and the block filled with diagonal lines represents PSS.

[0545] Taking the number of synchronization channels as 4 as an example, one PSS corresponds to four synchronization channels, and SSB represents one synchronization channel. Multiple synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources for transmission.

[0546] In FIG. 10, the frequency point of PSS is the same as that of the synchronization channel with the lowest frequency point in the multiple synchronization channels, for example, for SSB grid 1, the frequency point of PSS is the same as that of SSB #10 or SSB #14; for SSB grid N, the frequency point of PSS is the same as that of SSB #N0 or SSB #N4.

[0547] Alternatively, the frequency point of PSS is the same as that of the synchronization channel with the highest frequency point in the multiple synchronization channels, for example, for SSB grid 1, the frequency point of PSS is the same as that of SSB #13 or SSB #17; for SSB grid N, the frequency point of PSS is the same as that of SSB #N3 or SSB #N7.

[0548] In FIG. 11, the frequency point of PSS is the same as the center frequency of the multiple synchronization channels, that is, PSS is at the center position of the entire SSB group. As shown in FIG. 11, the frequency point of PSS is in the middle of the frequency point of SSB #1 and the frequency point of SSB #2, or in the middle of the frequency point of SSB #5 and the frequency point of SSB #6.

[0549] In a possible design of the embodiment, the bandwidth of the synchronization signal is equal to the sum of the bandwidths of the multiple synchronization channels.

[0550] FIG. 12 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. Taking the number of synchronization channels as 4 as an example, one PSS corresponds to four synchronization channels, and SSB represents one synchronization channel. In this embodiment, the bandwidth of PSS is equal to the sum of the bandwidths of the four synchronization channels, PSS is transmitted by using a larger bandwidth, and the synchronization channel is transmitted by using a smaller bandwidth, thereby improving the detection performance of PSS.

[0551] In a possible design of the embodiment, the SSB grid includes SSBs occupying continuous frequency domain resources and different time domain resources on one frequency band. The signal receiving device needs to detect SSBs on different SSB grids to determine the frequency domain position of the SSB.

[0552] As shown in FIG. 10, the SSB grid 1 includes SSB#10 to SSB#17, wherein SSB#10 to SSB#13 occupy the same time domain resource, SSB#14 to SSB#17 occupy the same time domain resource, SSB#10 and SSB#14 occupy different time domain resources, and SSB#10 to SSB#13 and SSB#14 to SSB#17 occupy the same continuous frequency domain resource.

[0553] The SSB grid N includes SSB#N0 to SSB#N7, wherein SSB#N0 to SSB#N3 occupy the same time domain resource, SSB#N4 to SSB#N7 occupy the same time domain resource, SSB#N0 and SSB#N4 occupy different time domain resources, and SSB#N0 to SSB#N3 and SSB#N4 to SSB#N7 occupy the same continuous frequency domain resource.

[0554] In a possible design of the embodiment, the signal receiving device respectively performs detection of SSBs on the time-frequency resources of each candidate SSB group until a complete SSB is detected.

[0555] In a possible design of the embodiment, the signal receiving device detects synchronization signals and synchronization channels by using the same receiving beam, performs blind detection of PSSs on the transmission resources of the PSSs on each grid, after detecting a PSS, determines the resource positions of multiple synchronization channels according to the resource position relationship between the PSS and the synchronization channels, performs detection of SSSs on the transmission resources of the SSSs on each resource position of the synchronization channels, and after detecting an SSS, detects a PBCH in the same synchronization channel.

[0556] In a possible design of the embodiment, the signal receiving device completes initial synchronization with the network device after completing detection of the SSS and the PBCH.

[0557] Optionally, the signal receiving device continues to perform detection of other synchronization channels, and determines an SSB with the highest receiving strength, for determining the transmission resource of the PRACH.

[0558] For the multiplexing manner of the SSS and the PBCH:

[0559] In a possible design of the embodiment, the frequency point of the PBCH is the same as that of the corresponding SSS, the bandwidth of the PBCH is greater than that of the SSS, and the PBCH is transmitted on both sides of the SSS.

[0560] FIGS. 13 to 15 respectively show schematic diagrams of a transmission method of synchronization signals and synchronization channels provided in an example embodiment of the present application.

[0561] The synchronization channel includes SSS and PBCH. Taking the number of synchronization channels as 4 as an example, in FIG. 13, the frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS is the same as the frequency point of the synchronization channel corresponding to PBCH#0.

[0562] In FIG. 14, the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels, for example, the frequency point of the PSS is in the middle of the frequency point of the synchronization channel corresponding to PBCH#1 and the frequency point of the synchronization channel corresponding to PBCH#2.

[0563] In FIG. 15, the bandwidth of the PSS is equal to the sum of the bandwidths of the plurality of synchronization channels, for example, the bandwidth of the PSS is equal to the sum of the bandwidths of the synchronization channel corresponding to PBCH#0 to the synchronization channel corresponding to PBCH#3.

[0564] The method for determining the SSB index includes the following three methods:

[0565] In a possible design of the embodiment, the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources, and carry the same SSB index indication information.

[0566] Since the plurality of synchronization channels carry the same SSB index indication information and MIB, the information bits carried by the plurality of synchronization channels are completely the same. At this time, the signal receiving device can perform joint detection based on the plurality of candidate PBCHs, thereby improving the detection success rate of the PBCH. For example, the detection signals on the plurality of PBCH candidate positions are subjected to soft bit combination or received signal combination, thereby improving the detection performance.

[0567] In a possible design of the embodiment, the SSB index indication information is carried by the PBCH and / or the DMRS of the PBCH in the synchronization channel.

[0568] In a possible design of the embodiment, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0569] In a possible design of the embodiment, the determination method includes at least one of the following three methods:

[0570] Method one: the SSB index indication information indicates the SSB index of a first synchronization channel in the plurality of synchronization channels, and the SSB index of the other synchronization channels except the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain position of the other synchronization channels.

[0571] In a possible design of the embodiment, the first synchronization channel is the synchronization channel with the lowest frequency point or the synchronization channel with the highest frequency point in the plurality of synchronization channels.

[0572] In a possible design of the embodiment, a frequency domain position of the synchronization channel is used to determine the first index value, which is an index value obtained by arranging the plurality of synchronization channels in a specified order according to the corresponding frequency points.

[0573] As shown in FIG. 11, the first synchronization channel is the synchronization channel with the lowest frequency point in the plurality of synchronization channels, that is, SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus the first index value n, where n is an index value obtained by arranging the plurality of synchronization channels in an order from low to high frequency points, that is, the synchronization channel with the lowest frequency point n=0 (SSB#0 or SSB#4), the synchronization channel with the next lowest frequency point n=1 (SSB#1 or SSB#5), and so on.

[0574] As shown in FIG. 12, the first synchronization channel is the synchronization channel with the highest frequency point in the plurality of synchronization channels, that is, SSB#0 or SSB#4, and the SSB index of the first synchronization channel is indicated by the SSB index indication information. The SSB index of the other synchronization channels is the SSB index of the first synchronization channel plus the first index value n, where n is an index value obtained by arranging the plurality of synchronization channels in an order from high to low frequency points, that is, the synchronization channel with the highest frequency point n=0 (SSB#0 or SSB#4), the synchronization channel with the next highest frequency point n=1 (SSB#1 or SSB#5), and so on.

[0575] The SSB index indication information can indicate values of k*M (k=0, 1, 2, …, N / M-1), and X1 bits of information are used to represent the values, where X1 is a value rounded up from log2(N / M), N is a total number of candidate SSBs, M is a number of synchronization channels using frequency division multiplexing, N and M are positive integers, and N is greater than or equal to M.

[0576] For example, in FIG. 11, N=8, M=4, and k=0, 1, so the SSB index indication information can indicate values of 0 and 4, and 1 bit of information is used to represent the values.

[0577] Method two: The SSB index indication information indicates an index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and the frequency domain position of each synchronization channel, where the SSB group contains a plurality of synchronization channels.

[0578] In a possible design of the embodiment, the SSB index indication information indicates that the index of the SSB group is k (k = 0, 1, 2,..., N / M-1), and X1 bits of information are used to represent the SSB index of each synchronization channel, where K = k*M+n, X1 is a value rounded up from log2(N / M), N is the total number of candidate SSBs, M is the number of synchronization channels, N and M are positive integers, N is greater than or equal to M, and n is an index value of the synchronization channels arranged in ascending order (or descending order) of frequency points.

[0579] For example, in FIG. 11, N = 8, M = 4, k = 0, 1, and 1 bit of information is used to represent, where SSB#0 corresponds to SSB index K0 = 0*4+0 = 0, SSB#1 corresponds to SSB index K1 = 0*4+1 = 1, SSB#4 corresponds to SSB index K4 = 1*4+0 = 4, SSB#5 corresponds to SSB index K5 = 1*4+1 = 5, and so on.

[0580] Method three: In a possible design of the embodiment, the SSB index is determined according to X bits of second information, the first X1 bits of the second information are indicated by the SSB index indication information, and the last X2 bits of the second information are determined by the frequency domain position of the synchronization channel.

[0581] where X is a value rounded up from log2(N), X1 is a value rounded up from log2(N / M), X2 is a value rounded up from log2(M), N is the total number of candidate SSBs, M is the number of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

[0582] In a possible design of the embodiment, the last X2 bits correspond to the value of the first index value n, and n is an index value of the synchronization channels arranged in ascending order (or descending order) of frequency points.

[0583] For example, in FIG. 11, N = 8, M = 4, the SSB index is determined according to 3 bits of second information, the first 1 bit of the second information is indicated by the SSB index indication information, and the last 2 bits of the second information are determined by the first index value n. For example, for SSB#0, the SSB index indication information indicates that the first 1 bit of the second information is 0, the first index value n is 0, so the last 2 bits of the second information are 00, and the second information is 000; for SSB#5, the SSB index indication information indicates that the first 1 bit of the second information is 1, the first index value n is 1, so the last 2 bits of the second information are 01, and the second information is 101.

[0584] In the method, since the frequency domain position of the synchronization channel is known, the SSB index indication information only needs to indicate part of the SSB index information, thereby compared with directly indicating the SSB index, the information bits carried by the synchronization channel can be reduced, and the detection performance of the SSB can be improved.

[0585] In a possible design of the embodiment, the SSBs (synchronization channels) using frequency division multiplexing and the SSBs (synchronization channels) using time division multiplexing correspond to different SSB indexes in one SSB synchronization period. For example, a SSB index arrangement manner of frequency domain first and time domain second can be used, as shown in FIG. 10 and FIG. 11. The SSBs using different indexes are transmitted by using different beams, so as to cover the entire cell through scanning of multiple beams. Since the SSB multiplexing manner using the combination of frequency division multiplexing and time division multiplexing is used, more SSBs can be supported in the same SSB transmission window.

[0586] In a possible design of the embodiment, the SSB index is used to determine the starting position of a subframe and a symbol, used to determine a PRACH transmission resource, used to configure a measurement resource of an SSB or used for downlink measurement, and the like.

[0587] For case two, the synchronization signal includes one PSS and one SSS.

[0588] In a possible design of the embodiment, the PSS and the SSS are transmitted on the same time domain resource and different frequency domain resources; or, the PSS and the SSS are transmitted on different time domain resources and the same frequency domain resources.

[0589] In a possible design of the embodiment, the multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0590] For the relationship between the PSS and the synchronization channel:

[0591] In a possible design of the embodiment, the PSS and the SSS are QCL, and the PSS and the PBCH are non-QCL.

[0592] In a possible design of the embodiment, the multiple synchronization channels are non-QCL.

[0593] The QCL parameter includes a spatial receiving parameter QCL typeD. The signal receiving device can assume that the PSS and the SSS use the same transmission beam, the signal receiving device cannot assume that the PSS and the PBCH use the same transmission beam, and cannot assume that the multiple synchronization channels use the same transmission beam, and needs to receive based on the assumption of different transmission beams.

[0594] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels:

[0595] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal has a fixed correspondence with the frequency domain resource position of the plurality of synchronization channels.

[0596] In a possible design of the embodiment, in the case where the synchronization signal includes one PSS and one SSS, the plurality of synchronization channels form one SSB group, the frequency domain resource position of the synchronization signal has a fixed correspondence with the frequency domain resource position of the plurality of synchronization channels, and the correspondence includes at least one of the following:

[0597] The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency point of the PSS and the SSS is the same as the center frequency point of the plurality of synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; and the PSS and the SSS are distributed on any one side of the SSB group.

[0598] FIG. 17 and FIG. 18 respectively show schematic diagrams of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. The white square represents the PBCH, the square filled with a right-up-to-left-down diagonal line represents the PSS, and the square filled with a left-up-to-right-down diagonal line represents the SSS.

[0599] Taking the number of PBCHs as 4 for example, one PSS and one SSS correspond to four synchronization channels (PBCHs), the plurality of synchronization channels form one SSB group, and different SSB groups can occupy different time domain resources and use different beams for transmission.

[0600] In FIG. 17, the PSS and the SSS use a multiplexing manner of time division multiplexing, and occupy continuous symbols and the same bandwidth. The frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as the frequency point of PBCH#0 or PBCH#4.

[0601] Alternatively, the frequency point of the PSS and the SSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels, for example, the frequency point of the PSS and the SSS is the same as the frequency point of PBCH#3 or PBCH#7.

[0602] In FIG. 18, the PSS and the SSS use a multiplexing manner of time division multiplexing, and occupy continuous symbols and the same bandwidth. The frequency point of the PSS and the SSS is the same as the center frequency point of the plurality of synchronization channels, that is, the PSS and the SSS are in the center position of the entire SSB group. As shown in FIG. 11, the frequency point of the PSS and the SSS is in the middle of the frequency point of PBCH#1 and the frequency point of PBCH#2, or in the middle of the frequency point of PBCH#5 and the frequency point of PBCH#6.

[0603] FIG. 19 to FIG. 21 respectively show schematic diagrams of the synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, the white squares represent PBCHs, the squares filled with right-up to left-down diagonal lines represent PSSs, and the squares filled with left-up to right-down diagonal lines represent SSSs.

[0604] Taking the number of PBCHs as 4 as an example, one PSS and one SSS correspond to four synchronization channels (PBCHs), and multiple synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0605] In FIG. 19, the PSS and the SSS are multiplexed by using frequency division multiplexing, and occupy the same symbol and continuous bandwidth. The PSS and the SSS are distributed on either side (upper side or lower side) of the SSB group, for example, the frequency point of the PSS is the same as that of PBCH#0 or PBCH#4, and the frequency point of the SSS is the same as that of PBCH#1 or PBCH#5.

[0606] In FIG. 20, the PSS and the SSS are multiplexed by using frequency division multiplexing, and occupy the same symbol and continuous bandwidth. The PSS and the SSS are distributed in the middle of the SSB group, for example, the frequency point of the PSS is the same as that of PBCH#1, and the frequency point of the SSS is the same as that of PBCH#2.

[0607] In FIG. 21, the PSS and the SSS are multiplexed by using frequency division multiplexing, and occupy the same symbol and continuous bandwidth. The PSS and the SSS are distributed on both sides of the SSB group, for example, the frequency point of the PSS is the same as that of PBCH#0, and the frequency point of the SSS is the same as that of PBCH#3.

[0608] The PSS and the SSS are multiplexed by using frequency division multiplexing, which can reduce the time domain resources occupied by the synchronization signal, thereby improving the flexibility of scheduling of other signals.

[0609] In a possible design of the embodiment, the sum of the bandwidths of the PSS and the SSS is equal to the sum of the bandwidths of the multiple synchronization channels.

[0610] FIG. 22 to FIG. 24 respectively show schematic diagrams of the synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. In the diagrams, the white squares represent PBCHs, the squares filled with right-up to left-down diagonal lines represent PSSs, and the squares filled with left-up to right-down diagonal lines represent SSSs.

[0611] Taking the number of PBCHs as 4 as an example, one PSS and one SSS correspond to four synchronization channels (PBCHs), and multiple synchronization channels form one SSB group. Different SSB groups can occupy different time domain resources and are transmitted by using different beams.

[0612] In FIG. 22, the PSS and the SSS occupy the same symbol and continuous bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#0 and PBCH#1, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#2 and PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#4 and PBCH#5, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#6 and PBCH#6.

[0613] In FIG. 23, the PSS and the SSS occupy the same symbol and continuous bandwidth, and the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3; or, the bandwidth of the PSS is the same as the sum of the bandwidths of PBCH#4 to PBCH#7, and the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#4 to PBCH#7.

[0614] In FIG. 24, the PSS and the SSS occupy the same symbol, the bandwidth of the PSS is the same as or close to the bandwidth of PBCH#0, and the bandwidth of the SSS is greater than the bandwidth of the PSS, for example, the bandwidth of the SSS is the same as the sum of the bandwidths of PBCH#0 to PBCH#3, so that the detection performance of the SSS is improved without increasing the PSS blind detection complexity.

[0615] In a possible design of the embodiment, SSBs occupying continuous frequency domain resources and different time domain resources form an SSB grid, and the signal receiving device performs SSB detection on different SSB grids to determine the frequency domain positions of the SSBs.

[0616] In a possible design of the embodiment, the signal receiving device performs PSS blind detection on the transmission resource of the PSS in each grid; after detecting the PSS, the corresponding SSS is detected on the same time domain resource or frequency domain resource; the resource positions of the multiple PBCHs are determined according to the correspondence between the time-frequency resource positions of the PSS or the SSS and the time-frequency resource positions of the multiple PBCHs; the PBCHs are respectively detected on the resource positions of the PBCHs; after successfully demodulating a certain PBCH, the signal receiving device completes the initial synchronization with the network device.

[0617] Optionally, the signal receiving device continues to perform detection on other synchronization channels to determine an SSB with the highest receiving strength, which is used to determine the transmission resource of the PRACH.

[0618] For the method of determining the SSB index:

[0619] In a possible design of the embodiment, the SSB index of each synchronization channel in the multiple synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0620] The specific implementation details are described in case one, which will not be repeated here.

[0621] For case three: the synchronization signal includes multiple PSSs and multiple SSSs.

[0622] The multiple PSSs and the multiple SSSs are in one-to-one correspondence with the multiple synchronization channels. Each SSB includes one PSS, one SSS, and one PBCH (synchronization channel), and the multiple SSBs use frequency division multiplexing transmission.

[0623] In a possible design of the embodiment, the multiple synchronization channels occupy adjacent and continuous frequency domain resources.

[0624] In a possible design of the embodiment, the PSS, the SSS, and the PBCH included in the same SSB are transmitted through the same beam, and different SSBs use different transmission beams.

[0625] For the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels:

[0626] In a possible design of the embodiment, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence.

[0627] In a possible design of the embodiment, in the case where the synchronization signal includes multiple PSSs and multiple SSSs, and each PSS, each SSS, and each synchronization channel are in one-to-one correspondence, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the multiple synchronization channels have a fixed correspondence, including that the frequency points of the PSS, the SSS, and the synchronization channel in one-to-one correspondence are the same.

[0628] FIG. 26 shows a schematic diagram of a synchronization signal and synchronization channel transmission method provided by an example embodiment of the present application. The white blocks represent SSBs, including PSSs, SSSs, and PBCHs.

[0629] The multiple SSBs form an SSB group. Taking the number of SSBs included in each SSB group as an example, the number is 4. In an SSB transmission window, multiple time division multiplexing SSB groups are included, and different SSB groups occupy different time domain resources and use different beams for transmission.

[0630] In FIG. 26, the multiple SSBs use frequency division multiplexing multiplexing, occupy the same symbol and continuous bandwidth. For example, SSB#0 to SSB#3 occupy the same symbol and continuous bandwidth, or SSB#4 to SSB#7 occupy the same symbol and continuous bandwidth.

[0631] In FIG. 27, in each SSB of one SSB group, the frequency points of PSS, SSS and PBCH in one-to-one correspondence are the same, for example, the frequency points of PSS#1, SSS#1 and PBCH#1 are the same.

[0632] For the method of determining the SSB index:

[0633] In a possible design of the embodiment, the SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

[0634] For specific implementation details, refer to the description in Case 1, which will not be repeated here.

[0635] For any one of the above three cases, the signal receiving apparatus receives SSB measurement configuration.

[0636] In a possible design of the embodiment, the receiving module 3010 is further configured to receive SSB measurement configuration, the SSB measurement configuration being used to indicate the resource position of the SSB to be detected by the signal receiving apparatus.

[0637] The SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponding to one SSB group, and the value of each bit being used to indicate whether to detect the SSB group corresponding to the current bit, the SSB group including a plurality of synchronization channels; or the SSB measurement configuration includes indication information of the SSB group and indication information of the synchronization channel, the indication information of the synchronization channel being used to indicate the position of the target synchronization channel in the SSB group, and the SSB group including a plurality of synchronization channels.

[0638] In the case where the SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponding to one SSB group, when the bit value is 1, it indicates that the SSB group is transmitted, and the signal receiving apparatus can detect the SSB group; when the bit value is 0, the signal receiving apparatus does not need to detect the SSB group.

[0639] In a possible design of the embodiment, the SSB measurement configuration is carried through SIB or PBCH.

[0640] In the case of carrying through PBCH, the signal receiving apparatus determines the transmitted SSB according to the SSB measurement configuration, so as to decide whether to detect.

[0641] In a case where the SSB measurement configuration includes indication information of an SSB group and indication information of a synchronization channel, the indication information of the SSB group is used to indicate one SSB group, and the indication information of the synchronization channel is used to indicate a position of a target synchronization channel in the SSB group. After receiving the SSB measurement configuration, the signal receiving apparatus performs measurement on the SSB at a resource position of the SSB indicated by the SSB measurement configuration, and reports a measurement result (such as RSRP or SINR) according to the indication of the network device.

[0642] In a possible design of the embodiment, the SSB measurement configuration is indicated by a CSI measurement resource configuration through RRC signaling, where the CSI measurement resource can include multiple SSB measurement configurations, and each SSB measurement configuration indicates one SSB. The measurement result is obtained based on SSS or DMRS, rather than PSS.

[0643] For any one of the above three cases, the signal receiving apparatus performs PRACH transmission.

[0644] In a possible design of the embodiment, the measurement module 3020 is configured to measure multiple synchronization channels and obtain measurement results of the multiple synchronization channels, the determination module 3030 is configured to determine a target synchronization channel according to the measurement results of the multiple synchronization channels, and the transmission module 3040 is configured to perform corresponding PRACH transmission according to the target synchronization channel. The PRACH transmission according to the target synchronization channel includes the following.

[0645] The PRACH transmission is performed through a PRACH transmission resource and a preamble sequence corresponding to the target synchronization channel. The multiple synchronization channels correspond to the same PRACH transmission resource, and each synchronization channel of the multiple synchronization channels corresponds to one preamble sequence on the PRACH transmission resource. Alternatively, the PRACH transmission is performed through a PRACH transmission resource corresponding to the target synchronization channel. The multiple synchronization channels correspond to different PRACH transmission resources on the same time domain resource. Alternatively, according to an index of an SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel, a PRACH transmission resource is determined, and the PRACH transmission is performed through the PRACH transmission resource. The PRACH transmission resource and the index of the SSB group and the frequency domain position of the target synchronization channel have a preset mapping relationship. The SSB group includes the multiple synchronization channels.

[0646] In a possible design of the embodiment, the target synchronization channel is a target SSB, and the target SSB is an SSB with the highest received intensity (highest RSRP) among SSBs satisfying an RSRP threshold.

[0647] Case one: PRACH transmission is performed through the PRACH transmission resource and preamble sequence corresponding to the target synchronization channel.

[0648] In a possible design of the embodiment, each SSB group (synchronization channel group) corresponds to a same PRACH transmission resource, and different synchronization channels in the SSB group correspond to a preamble sequence on the PRACH transmission resource. For different SSB groups that are time-division multiplexed, a same PRACH transmission resource can be corresponded to, so that the PRACH transmission resources of different SSB groups are also distinguished by preamble sequences; or different PRACH transmission resources can also be corresponded to.

[0649] Case two: PRACH transmission is performed through the PRACH transmission resource corresponding to the target synchronization channel.

[0650] In a possible design of the embodiment, multiple synchronization channels correspond to different PRACH transmission resources on a same symbol, and the signal receiving apparatus performs PRACH transmission through the PRACH transmission resource corresponding to the target synchronization channel.

[0651] Case three: The PRACH transmission resource is determined according to the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and PRACH transmission is performed through the PRACH transmission resource.

[0652] In a possible design of the embodiment, each PRACH transmission resource has a preset mapping relationship with the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and the SSB group includes multiple synchronization channels, and the mapping relationship is as shown in Table Two.

[0653] In a possible design of the embodiment, the signal receiving apparatus determines the PRACH transmission resource corresponding to the target synchronization channel according to the preset mapping relationship.

[0654] For example, the index of the SSB group is 0, the frequency domain position index of the target synchronization channel is 1, and the PRACH transmission resource corresponding to the target synchronization channel is determined to be RO2 according to the preset mapping relationship.

[0655] In the embodiment, the receiving module 3010 can be split into at least one receiving submodule, each receiving submodule being configured to perform the at least one receiving step described above, for example, a first receiving submodule, a second receiving submodule, and a third receiving submodule. The first receiving submodule is configured to receive the synchronization signal, the second receiving submodule is configured to receive the plurality of synchronization channels associated with the synchronization signal, and the third receiving submodule is configured to receive the SSB measurement configuration; or the first receiving submodule is configured to receive the plurality of synchronization channels associated with the synchronization signal, the second receiving submodule is configured to receive the SSB measurement configuration, and the third receiving submodule is configured to receive the synchronization signal; or the first receiving submodule is configured to receive the SSB measurement configuration, the second receiving submodule is configured to receive the synchronization signal, and the third receiving submodule is configured to receive the plurality of synchronization channels associated with the synchronization signal; and the embodiment does not limit the functions of the different receiving submodules.

[0656] In the embodiment, the transmission module 3040 can be split into at least one transmission submodule, each transmission submodule being configured to perform the at least one transmission step described above, for example, a first transmission submodule, a second transmission submodule, and a third transmission submodule. The first transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource and the preamble sequence corresponding to the target synchronization channel, the second transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource corresponding to the target synchronization channel, and the third transmission submodule is configured to determine the PRACH transmission resource according to the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel, and perform the PRACH transmission through the PRACH transmission resource; or the first transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource corresponding to the target synchronization channel, the second transmission submodule is configured to determine the PRACH transmission resource according to the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel, and perform the PRACH transmission through the PRACH transmission resource, and the third transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource and the preamble sequence corresponding to the target synchronization channel; or the first transmission submodule is configured to determine the PRACH transmission resource according to the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel, and perform the PRACH transmission through the PRACH transmission resource, the second transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource and the preamble sequence corresponding to the target synchronization channel, and the third transmission submodule is configured to perform the PRACH transmission through the PRACH transmission resource corresponding to the target synchronization channel; and the embodiment does not limit the functions of the different transmission submodules.

[0657] The embodiment takes one receiving module 3010 and one transmission module 3040 as an example, and the number of the receiving module 3010 and the transmission module 3040 is not limited. The function of the receiving module 3010 can refer to the content of step 2810 in the embodiment of FIG. 28. The function of the measurement module 3020 can refer to the content of step 2810 in the embodiment of FIG. 28. The function of the determination module 3030 can refer to the content of step 2810 in the embodiment of FIG. 28. The function of the transmission module 3040 can refer to the content of step 2810 in the embodiment of FIG. 28.

[0658] FIG. 31 shows a structural diagram of a terminal device according to an example embodiment of the present application. The terminal device 3100 can be used to execute the method steps performed by the terminal device in the above embodiments. The terminal device 3100 can include a processor 3101, a transceiver 3102, and a memory 3103. The processor 3101 can be used to control the sending and / or receiving, such as to implement the functions of at least one of the measurement module 3020 and the determination module 3031. The transceiver 3102 can be used to implement the functions of sending and / or receiving, such as to implement the functions of at least one of the receiving module 3010 and the transmission module 3040.

[0659] The processor 3101 includes one or more processing cores. The processor 3101 executes various functional applications and information processing by running software programs and modules.

[0660] The transceiver 3102 can include a receiver and a transmitter, which can be implemented as the same wireless communication component, and the wireless communication component can include a wireless communication chip and a radio frequency antenna.

[0661] The memory 3103 can be connected to the processor 3101 and the transceiver 3102.

[0662] The memory 3103 can be used to store computer programs executed by the processor 3101, and the processor 3101 is used to execute the computer programs to implement various steps in the above method embodiments.

[0663] In addition, the memory 3103 can 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, an erasable programmable read-only memory, a static random access memory, a read-only memory, a magnetic storage, a flash memory, and a programmable read-only memory.

[0664] In some embodiments, the transceiver 3102 is configured to receive a synchronization signal, the synchronization signal comprising one or more PSSs; and receive a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a PBCH; wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0665] For details not described in the present embodiment, refer to the above embodiments, which will not be repeated here.

[0666] FIG. 32 shows a structural schematic diagram of a network device according to an example embodiment of the present application. The network device 3200 can be used to perform the method steps performed by the network device in the above embodiments. The network device 3200 can include a processor 3201, a transceiver 3202, and a memory 3203. The processor 3201 can be configured to control the sending and / or receiving. The transceiver 3202 can be configured to implement the functions of sending and / or receiving, such as the functions of at least one of the sending module 2910 and the receiving module 2920 described above.

[0667] The processor 3201 includes one or more processing cores. The processor 3201 performs various function applications and information processing by running software programs and modules.

[0668] The transceiver 3202 can include a receiver and a transmitter. For example, the transceiver 3202 can include a wired communication component, which can include a wired communication chip and a wired interface (such as a fiber interface). Optionally, the transceiver 3202 can also include a wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0669] The memory 3203 can be connected to the processor 3201 and the transceiver 3202.

[0670] The memory 3203 can be used to store computer programs for the processor to execute. The processor 3201 is configured to execute the computer programs to implement each step of the network device in the above method embodiments.

[0671] In addition, the memory 3203 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memories, erasable programmable read-only memories, static random access memories, read-only memories, magnetic memories, flash memories, programmable read-only memories.

[0672] In some embodiments, the transceiver 3202 is configured to transmit a synchronization signal, the synchronization signal comprising one or more PSSs; and transmit a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a PBCH; wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

[0673] For details not described in the present embodiment, refer to the above embodiments, which will not be repeated here.

[0674] Embodiments of the present application also provide a computer readable storage medium, the storage medium storing a computer program, the computer program being configured to be executed by a processor to implement the above-mentioned signal receiving method at the terminal device side, or implement the above-mentioned signal sending method at the network device side. In some embodiments, the computer readable storage medium can include ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disc, etc. Among them, the random access memory can include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0675] Embodiments of the present application also provide a chip, the chip comprising a programmable logic circuit and / or program instructions, when the chip is running, for implementing the above-mentioned signal receiving method at the terminal device side, or implementing the above-mentioned signal sending method at the network device side.

[0676] Embodiments of the present application also provide a computer program product, the computer program product comprising a computer program, the computer program being stored in a computer readable storage medium, and a processor reading and executing the computer program from the computer readable storage medium to implement the above-mentioned signal receiving method at the terminal device side, or implement the above-mentioned signal sending method at the network device side.

[0677] It should be understood that the "indication" mentioned in the embodiments of the present application can be direct indication, or indirect indication, or can be an indication with an associated relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can obtain through A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can obtain through C; or it can mean that A and B have an associated relationship.

[0678] In the description of the embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, can also represent an associated relationship between the two, and can also indicate a relationship with the indicated, configured, and the like.

[0679] In some embodiments of the present application, "predefined" can be realized by pre-saving the corresponding code, table or other means that can be used to indicate related information in the device (for example, including terminal device and network device), and the specific implementation manner of the present application is not limited. For example, predefined can refer to the definition in the protocol.

[0680] In some embodiments of the present application, "protocol" can refer to a standard protocol in the communication field, which can include LTE protocol, NR protocol and related protocols applied in future communication systems, and the present application is not limited to this.

[0681] "Multiple" mentioned in the present document refers to two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0682] "Greater than or equal to" mentioned in the present document can represent greater than or equal to, and "less than or equal to" can represent less than or equal to.

[0683] In addition, the step numbers described in the present document only exemplarily show a possible execution order between the steps, and in some other embodiments, the above steps can also be executed in a sequence different from the number, such as simultaneously executing two steps with different numbers, or executing two steps with different numbers in a sequence opposite to the illustration, and the embodiments of the present application are not limited to this.

[0684] Those skilled in the art should realize that in one or more of the above examples, the functions described in the embodiments of the present application can be realized by hardware, software, firmware or any combination thereof. When realized by software, these functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes computer storage medium and communication medium, wherein the communication medium includes any medium facilitating the transmission of computer programs from one place to another. The storage medium can be any available medium accessible by a general or special purpose computer.

[0685] The above is only an exemplary embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A signal receiving method characterized by comprising: The method is performed by a terminal device, and the method comprises: receiving a synchronization signal, the synchronization signal comprising one or more primary synchronization signals (PSSs); and receiving a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a physical broadcast channel (PBCH); wherein the plurality of synchronization channels occupy the same time domain resources and different frequency domain resources.

2. The method of claim 1, wherein, The synchronization signal comprises one PSS, and each of the synchronization channels further comprises a secondary synchronization signal (SSS).

3. The method of claim 2, wherein, The SSS belonging to the same synchronization channel is quasi co-located (QCL) with the PBCH, and the PSS is non-QCL with the plurality of synchronization channels.

4. The method of claim 1, wherein, The synchronization signal comprises one PSS and one SSS.

5. The method of claim 4, wherein, The PSS and the SSS are transmitted on the same time domain resources and different frequency domain resources.

6. The method of claim 4, wherein, The PSS and the SSS are QCL, and the PSS and the PBCH are non-QCL.

7. The method of claim 1, wherein, The synchronization signal comprises a plurality of PSSs and a plurality of SSSs, and the plurality of PSSs and the plurality of SSSs correspond one-to-one to the plurality of synchronization channels.

8. The method of claim 1, wherein, The number of the plurality of synchronization channels is determined according to a frequency band in which the synchronization channels are located and / or a subcarrier spacing used for transmitting the synchronization channels; or the number of the plurality of synchronization channels is determined according to first information carried by the synchronization channels, the first information being used to indicate the number of the plurality of synchronization channels.

9. The method according to any one of claims 1 to 8, characterized in that, The plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

10. The method according to any one of claims 1 to 9, characterized in that, The plurality of synchronization channels are non-QCL.

11. The method of claim 1, wherein, The frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels.

12. The method of claim 11, wherein, The synchronization signal comprises one PSS, and the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels, including at least one of the following: The frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the center frequency of the plurality of synchronization channels.

13. The method of claim 11, wherein, The synchronization signal comprises one PSS and one SSS, the plurality of synchronization channels form one SSB group, and the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels, including at least one of the following: The frequency points of the PSS and the SSS are the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency points of the PSS and the SSS are the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency points of the PSS and the SSS are the same as the center frequency of the plurality of synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; the PSS and the SSS are distributed on any one side of the SSB group.

14. The method of claim 11, wherein, The synchronization signal includes a plurality of PSSs and a plurality of SSSs, each PSS, each SSS, and each synchronization channel one-to-one corresponding, the frequency domain resource position of the synchronization signal and the frequency domain resource position of the plurality of synchronization channels have a fixed corresponding relationship, including: the frequency points of the PSS, the SSS, and the synchronization channel corresponding to each other are the same.

15. The method of claim 1, wherein, The bandwidth of the synchronization signal is equal to the sum of the bandwidths of the plurality of synchronization channels.

16. The method of claim 1, wherein, The plurality of synchronization channels carry the same SSB index indication information.

17. The method of claim 16, wherein, The SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

18. The method of claim 17, wherein, The SSB index indication information indicates the SSB index of a first synchronization channel in the plurality of synchronization channels, and the SSB index of other synchronization channels except the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain position of the other synchronization channels.

19. The method of claim 18, wherein, The first synchronization channel is the synchronization channel with the lowest frequency point or the synchronization channel with the highest frequency point in the plurality of synchronization channels.

20. The method of claim 17, wherein, The SSB index indication information indicates the index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and the frequency domain position of each synchronization channel, wherein the SSB group contains the plurality of synchronization channels.

21. The method of claim 17, wherein, The SSB index is determined according to X-bit second information, the first X1 bits of the second information are indicated by the SSB index indication information, and the last X2 bits of the second information are determined by the frequency domain position of the synchronization channel; wherein X is the upward integer value of log2(N), X1 is the upward integer value of log2(N / M), X2 is the upward integer value of log2(M), N is the total number of candidate SSBs, M is the number of the plurality of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

22. The method of any one of claims 17 to 21, wherein, The frequency domain position of the synchronization channel is used to determine a first index value, and the first index value is an index value obtained by arranging the plurality of synchronization channels in a specified order according to the corresponding frequency points.

23. The method of claim 1, wherein, The method further comprises: receiving an SSB measurement configuration, the SSB measurement configuration being used to indicate the resource position of the SSB to be detected by the terminal device; wherein the SSB measurement configuration includes a plurality of bits, each bit of the plurality of bits corresponds to an SSB group, and the value of each bit is used to indicate whether to detect the SSB group corresponding to the current bit, and the SSB group contains the plurality of synchronization channels; or The SSB measurement configuration includes SSB group indication information and synchronization channel indication information, the synchronization channel indication information is used to indicate the position of the target synchronization channel in the SSB group, and the SSB group contains the plurality of synchronization channels.

24. The method of claim 1, wherein, The method further comprises: The method comprises the following steps: measuring the plurality of synchronization channels to obtain measurement results of the plurality of synchronization channels; determining a target synchronization channel according to the measurement results of the plurality of synchronization channels; and performing corresponding PRACH transmission according to the target synchronization channel; wherein the corresponding PRACH transmission according to the target synchronization channel comprises:

25. A method of signaling, characterized by performing PRACH transmission through a PRACH transmission resource and a preamble sequence corresponding to the target synchronization channel; the plurality of synchronization channels correspond to the same PRACH transmission resource, and each synchronization channel in the plurality of synchronization channels corresponds to one preamble sequence on the PRACH transmission resource; or performing the PRACH transmission through a PRACH transmission resource corresponding to the target synchronization channel; the plurality of synchronization channels correspond to different PRACH transmission resources on the same time domain resource; or determining a PRACH transmission resource according to an index of an SSB group in which the target synchronization channel is located and a frequency domain position of the target synchronization channel in the SSB group, and performing the PRACH transmission through the PRACH transmission resource; the PRACH transmission resource has a preset mapping relationship with the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group; and the SSB group contains the plurality of synchronization channels. The method is performed by a network device, and the method comprises: sending a synchronization signal, the synchronization signal comprising one or more primary synchronization signals (PSSs); and sending a plurality of synchronization channels associated with the synchronization signal, each synchronization channel in the plurality of synchronization channels comprising a physical broadcast channel (PBCH); 26. The method of claim 25, wherein, wherein the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources.

27. The method of claim 26, wherein, The synchronization signal comprises one PSS, and each synchronization channel further comprises a secondary synchronization signal (SSS). The SSSs belonging to the same synchronization channel are transmitted through the same beam as the PBCH, and the PSSs are transmitted through different beams from the plurality of synchronization channels.

28. The method of claim 26, wherein, The SSSs belonging to different synchronization channels are transmitted through different beams from the PBCH.

29. The method of claim 25, wherein, The beam width of the beam used to transmit the PSS is greater than the beam width of the beam used to transmit the plurality of synchronization channels.

30. The method of claim 29, wherein, The synchronization signal comprises one PSS and one SSS.

31. The method of claim 29, wherein, The PSS and the SSS are transmitted on the same time domain resource and different frequency domain resources.

32. The method of claim 31, wherein, The PSS and the SSS are transmitted through the same beam, and the PSS and the PBCH are transmitted through different beams.

33. The method of claim 25, wherein, The beam width of the beam used to transmit the PSS and the SSS is greater than the beam width of the beam used to transmit the PBCH. The synchronization signal comprises a plurality of PSSs and a plurality of SSSs, and the plurality of PSSs and the plurality of SSSs correspond one-to-one to the plurality of synchronization channels.

34. The method of claim 25, wherein, The number of the plurality of synchronization channels is determined according to a frequency band in which the synchronization channels are located and / or a subcarrier spacing used for transmitting the synchronization channels; or the number of the plurality of synchronization channels is determined according to first information carried by the synchronization channels, the first information being used to indicate the number of the plurality of synchronization channels.

35. The method of any one of claims 25 to 34, wherein, The plurality of synchronization channels occupy adjacent and continuous frequency domain resources.

36. The method of any one of claims 25 to 35, wherein, The plurality of synchronization channels are transmitted through different beams.

37. The method of claim 25, wherein, The frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels.

38. The method of claim 37, wherein, The synchronization signal includes one PSS, and the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels, including at least one of the following: The frequency point of the PSS is the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency point of the PSS is the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; and the frequency point of the PSS is the same as the center frequency point of the plurality of synchronization channels.

39. The method of claim 37, wherein, The synchronization signal includes one PSS and one SSS, the plurality of synchronization channels form one SSB group, and the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels, including at least one of the following: The frequency points of the PSS and the SSS are the same as the frequency point of the synchronization channel with the lowest frequency point in the plurality of synchronization channels; the frequency points of the PSS and the SSS are the same as the frequency point of the synchronization channel with the highest frequency point in the plurality of synchronization channels; the frequency points of the PSS and the SSS are the same as the center frequency point of the plurality of synchronization channels; the PSS and the SSS are distributed in the middle or on both sides of the SSB group; and the PSS and the SSS are distributed on any one side of the SSB group.

40. The method of claim 37, wherein, The synchronization signal includes a plurality of PSSs and a plurality of SSSs, each PSS, each SSS and each synchronization channel are one-to-one corresponding, the frequency domain resource position of the synchronization signal has a fixed correspondence relationship with the frequency domain resource position of the plurality of synchronization channels, including that the frequency points of the PSS, the SSS and the synchronization channel corresponding to each other are the same.

41. The method of claim 25, wherein, The bandwidth of the synchronization signal is equal to the sum of the bandwidths of the plurality of synchronization channels.

42. The method of claim 25, wherein, The plurality of synchronization channels carry the same SSB index indication information.

43. The method of claim 42, wherein, The SSB index of each synchronization channel in the plurality of synchronization channels is determined according to the SSB index indication information and the frequency domain position of the synchronization channel.

44. The method of claim 43, wherein, The SSB index indication information indicates the SSB index of a first synchronization channel in the plurality of synchronization channels, and the SSB index of other synchronization channels except the first synchronization channel is determined according to the SSB index of the first synchronization channel and the frequency domain position of the other synchronization channels.

45. The method of claim 44, wherein, The first synchronization channel is the synchronization channel with the lowest frequency point or the synchronization channel with the highest frequency point in the plurality of synchronization channels.

46. The method of claim 43, wherein, The SSB index indication information indicates an index of an SSB group, and the SSB index of each synchronization channel is determined according to the index of the SSB group and a frequency domain position of the each synchronization channel, wherein the SSB group contains the plurality of synchronization channels.

47. The method of claim 43, wherein, The SSB index is determined according to second information of X bits, X1 bits in front of the second information are indicated by the SSB index indication information, and X2 bits in back of the second information are determined by the frequency domain position of the synchronization channel. Wherein, X is the upward integer value of log2(N), X1 is the upward integer value of log2(N / M), X2 is the upward integer value of log2(M), N is the total number of candidate SSBs, M is the number of the plurality of synchronization channels, N and M are positive integers, and N is greater than or equal to M.

48. The method of any one of claims 43 to 47, wherein, The frequency domain position of the synchronization channel is used to determine a first index value, and the first index value is an index value obtained by arranging the plurality of synchronization channels in a specified order according to corresponding frequency points.

49. The method of claim 25, wherein, The method further comprises: sending SSB measurement configuration, the SSB measurement configuration is used to indicate the resource position of the SSB which needs to be detected by the terminal device; Wherein, the SSB measurement configuration includes a plurality of bits, each bit in the plurality of bits corresponds to an SSB group, and the value of each bit is used to indicate whether the terminal device detects the SSB group corresponding to the current bit, and the SSB group contains the plurality of synchronization channels; or, the SSB measurement configuration includes indication information of an SSB group and indication information of the synchronization channel, and the indication information of the synchronization channel is used to indicate the position of the target synchronization channel in the SSB group, and the SSB group contains the plurality of synchronization channels.

50. The method of claim 25, wherein, The method further comprises: receiving a physical random access channel (PRACH) and determining a corresponding target synchronization channel according to the PRACH; Wherein, the plurality of synchronization channels correspond to the same PRACH transmission resource, and each synchronization channel in the plurality of synchronization channels corresponds to one preamble sequence on the PRACH transmission resource; or, the plurality of synchronization channels correspond to different PRACH transmission resources on the same time domain resource; or, there is a preset mapping relationship between the PRACH transmission resource and the index of the SSB group in which the target synchronization channel is located and the frequency domain position of the target synchronization channel in the SSB group, and the SSB group contains the plurality of synchronization channels.

51. The method of claim 50, wherein, The beam used to transmit the target synchronization channel is the beam used to transmit subsequent other downlink signals.

52. A signal receiving device, comprising: The device comprises: a receiving module, configured to receive a synchronization signal, the synchronization signal comprising one or more primary synchronization signals (PSSs), and receive a plurality of synchronization channels associated with the synchronization signal, each synchronization channel in the plurality of synchronization channels comprising a physical broadcast channel (PBCH); wherein the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources. The device comprises:

53. A signal sending device, characterized in that: ​ The sending module is configured to send a synchronization signal, the synchronization signal comprising one or more primary synchronization signals (PSSs), and to send a plurality of synchronization channels associated with the synchronization signal, each of the plurality of synchronization channels comprising a physical broadcast channel (PBCH), wherein the plurality of synchronization channels occupy the same time domain resource and different frequency domain resources.

54. A terminal device, comprising: The terminal device comprises: a processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor, wherein the processor is configured to load and execute the executable instructions to implement the signal receiving method according to any one of claims 1 to 24.

55. A network device, comprising: The network device comprises: a processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor, wherein the processor is configured to load and execute the executable instructions to implement the signal sending method according to any one of claims 25 to 51.

56. A computer-readable storage medium, comprising: The computer readable storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the signal receiving method according to any one of claims 1 to 24 or the signal sending method according to any one of claims 25 to 51.

57. A chip, comprising: The chip comprises programmable logic circuitry and / or program instructions, and when the chip is running on a terminal device or a network device, the programmable logic circuitry and / or the program instructions are configured to implement the signal receiving method according to any one of claims 1 to 24 or the signal sending method according to any one of claims 25 to 51.

58. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium, and the processor obtains the computer instructions from the computer readable storage medium, and executes the computer instructions to implement the signal receiving method according to any one of claims 1 to 24 or the signal sending method according to any one of claims 25 to 51.

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