Communication method and device

Abstract

The invention provides a communication method and device, and relates to the field of wireless communication. In the method, the RAN node may broadcast a PSS, an SSS, an NR PBCH, and a 6G PBCH. In this way, the NR terminal can complete downlink synchronization with the RAN node according to the PSS and the SSS, and then demodulate the NR PBCH to realize wireless access. In this way, the 6G terminal can complete downlink synchronization with the RAN node according to the PSS and the SSS, and then demodulate the 6G PBCH to realize wireless access. In the process, the NR PBCH and the 6G PBCH can share the PSS and the SSS. Therefore, the RAN node does not need to respectively send the PSS and the SSS for the NR PBCH and the 6G PBCH, and the wireless resource overhead can be reduced.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular, to communication methods and devices. Background Art

[0002] In a communication system, after a terminal enters the coverage area of a radio access network (RAN) node, it needs to perform initial access. For example, the RAN node may send a synchronization signal block (SSB) to the terminal. Among them, the SSB may include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The terminal can complete downlink synchronization with the RAN node according to the PSS and SSS, and obtain the broadcast message carried in the PBCH. Subsequently, the terminal can obtain access resources according to the broadcast message and access the RAN through the access resources. However, when the communication system supports multiple radio access technologies, the above method of the RAN node sending the SSB will result in a large overhead of wireless resources. Summary of the Invention

[0003] This application provides communication methods and devices, which can reduce the overhead of wireless resources.

[0004] To achieve the above objective, the following technical solutions are adopted in this application:

[0005] In a first aspect, a communication method is provided, and this method can be executed by an RAN node. Here, the RAN node may refer to the RAN node itself, or a processor, module, logical node, chip, or chip system in the RAN node that implements this method.

[0006] The method includes: sending a primary synchronization signal, a secondary synchronization signal, a physical broadcast channel of a first radio access technology (referred to as the first physical broadcast channel for short), and a physical broadcast channel of a second radio access technology (referred to as the second physical broadcast channel for short). Among them, the primary synchronization signal, the secondary synchronization signal, and the first physical broadcast channel can be regarded as a synchronization signal block (such as a synchronization signal block of the first radio access technology), the primary synchronization signal, the secondary synchronization signal, and the second physical broadcast channel can be regarded as another synchronization signal block (such as a synchronization signal block of the second radio access technology), and the first radio access technology and the second radio access technology are different.

[0007] Based on the method provided in the above first aspect, a terminal supporting a first radio access technology can perform downlink synchronization according to the primary synchronization signal and the secondary synchronization signal, and then demodulate the first physical broadcast channel to achieve radio access. A terminal supporting a second radio access technology can perform downlink synchronization according to the primary synchronization signal and the secondary synchronization signal, and then demodulate the second physical broadcast channel to achieve radio access. In other words, the first physical broadcast channel and the second physical broadcast channel can share the primary synchronization signal and the secondary synchronization signal, so the RAN node does not need to separately send the primary synchronization signal and the secondary synchronization signal for the first physical broadcast channel and the second physical broadcast channel. Therefore, the above method can reduce the radio resource overhead and thus improve the radio resource utilization rate.

[0008] In a possible implementation, the primary synchronization signal and the secondary synchronization signal each occupy 1 time unit in the time domain, the first physical broadcast channel occupies 2 time units in the time domain, and the second physical broadcast channel occupies 2 time units in the time domain. Here, 1 time unit is 1 symbol, or 1 time unit includes multiple consecutive symbols in the time domain.

[0009] In a possible implementation, the 2 time units occupied by the first physical broadcast channel and the 2 time units occupied by the second physical broadcast channel do not overlap, and the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel overlap. In this way, the RAN node can use a time-division method to send the first physical broadcast channel and the second physical broadcast channel. Since the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel overlap, both of them can overlap with the synchronization signal (such as the primary synchronization signal and the secondary synchronization signal) in the frequency domain to achieve a better frequency domain synchronization effect.

[0010] In a possible implementation, the primary synchronization signal occupies the first time unit, the secondary synchronization signal occupies the second time unit, and the second physical broadcast channel occupies the third time unit and the fourth time unit; the second time unit is after the first time unit and is separated from the first time unit by 1 time unit; the third time unit is after the first time unit and is separated from the first time unit by 3 time units; the fourth time unit is after the first time unit and is separated from the first time unit by 4 time units.

[0011] In a possible implementation, the primary synchronization signal occupies the first time unit, the secondary synchronization signal occupies the second time unit, and the second physical broadcast channel occupies the third time unit and the fourth time unit; the second time unit is after the first time unit and is separated from the first time unit by 1 time unit; the third time unit is before the first time unit and is separated from the first time unit by 1 time unit; the fourth time unit is before the first time unit and is adjacent to the first time unit.

[0012] In a possible implementation, the two time units occupied by the first physical broadcast channel are the same as the two time units occupied by the second physical broadcast channel, and the frequency-domain resources occupied by the first physical broadcast channel and the second physical broadcast channel do not overlap. In the above manner, the RAN node can send the first physical broadcast channel and the second physical broadcast channel in a frequency-division manner. The first physical broadcast channel and the second physical broadcast channel overlap in the time domain, which can make the time-domain interval between the second physical broadcast channel and the synchronization signal smaller, and can ensure better time-domain synchronization effect of the second physical broadcast channel.

[0013] In a possible implementation, the primary synchronization signal occupies the first time unit, the secondary synchronization signal occupies the second time unit, and the second physical broadcast channel occupies the third time unit and the fourth time unit; the second time unit is located after the first time unit and is separated from the first time unit by 1 time unit; the third time unit is located after the first time unit and is adjacent to the first time unit; the fourth time unit is located after the first time unit and is separated from the first time unit by 2 time units.

[0014] In a second aspect, a communication device is provided for implementing the above method. The communication device may be the RAN node in the first aspect above. The communication device includes corresponding modules, units, or means for implementing the above method, and the modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0015] In a possible implementation, the communication device may include a processing unit and a transceiver unit. The processing unit may be used to implement the processing functions in the first aspect and any possible implementation thereof above. The processing unit may be a processor, for example. The transceiver unit, also referred to as a transceiver module, is used to implement the sending and / or receiving functions in the first aspect and any possible implementation thereof above. The transceiver unit may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0016] In a possible implementation, the transceiver unit includes a sending unit and a receiving unit, which are respectively used to implement the sending and receiving functions in the first aspect and any possible implementation thereof above.

[0017] In a third aspect, a communication device is provided, including: a processor; the processor is used to be coupled with a memory and, after reading instructions in the memory, execute the method described in the first aspect above. The communication device may be the RAN node in the first aspect above.

[0018] In a possible implementation, the communication device further includes a memory for storing program instructions and data. Optionally, the memory is integrated with the above-mentioned processor; or, the memory is independent of the processor.

[0019] In a possible implementation, the processor and / or the memory further includes an artificial intelligence (AI) module for implementing AI-related functions. The AI module can implement AI functions in a software, hardware, or software-hardware combination manner. For example, the AI module includes a RAN intelligent controller (RIC) module.

[0020] In a possible implementation, the communication device is a chip or a chip system. Optionally, when the communication device is a chip system, it can be composed of chips or include chips and other discrete devices.

[0021] In a fourth aspect, a communication device is provided, including: a processor and an interface circuit; the interface circuit is configured to receive signals from other communication devices and transmit them to the processor, or send signals from the processor to other communication devices; the processor is configured to implement the method described in the first aspect above through logic circuits or by executing code instructions. The communication device can be the RAN node in the first aspect above.

[0022] In a possible implementation, the processor further includes an AI module for implementing AI-related functions. The AI module can implement AI functions in a software, hardware, or software-hardware combination manner. For example, the AI module includes a RIC module.

[0023] In a possible implementation, the communication device is a chip or a chip system. Optionally, when the communication device is a chip system, it can be composed of chips or include chips and other discrete devices.

[0024] In a fifth aspect, a computer-readable storage medium is provided, in which computer programs or instructions are stored. When the computer programs or instructions are executed by a communication device, the method described in the first aspect above is implemented.

[0025] In a sixth aspect, a computer program product is provided, including computer programs or instructions. When the computer programs or instructions are executed by a communication device, the method described in the first aspect above is implemented.

[0026] In a seventh aspect, a communication system is provided. The communication system includes a RAN node configured to execute the method described in the first aspect above. The communication system further includes a terminal supporting a second radio access technology. The terminal can receive a primary synchronization signal, a secondary synchronization signal, and a first physical broadcast channel, perform downlink synchronization based on the primary synchronization signal and the secondary synchronization signal, and demodulate the first physical broadcast channel.

[0027] Among them, for the technical effects brought by any possible implementation manner in the second aspect to the seventh aspect, reference may be made to the technical effects brought by any one or any different possible implementation manner in the first aspect to the second aspect above, which will not be elaborated here.

[0028] It can be understood that, on the premise that the solutions do not conflict, the solutions in the above aspects can be combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a resource block (RB) and a time slot provided by this application;

[0030] Figure 2 Schematic diagram of the time-frequency resources occupied by SSBs of different radio access technologies provided by this application;

[0031] Figure 3 Schematic diagram of the communication system architecture provided by this application;

[0032] Figure 4 Schematic diagram of the process of the communication method provided by this application;

[0033] Figure 5 Schematic diagram of the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH provided by this application Figure 1 ;

[0034] Figure 6 Schematic diagram of the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH provided by this application Figure 2 ;

[0035] Figure 7 Schematic diagram of the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH provided by this application Figure 3 ;

[0036] Figure 8 Schematic diagram of the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH provided by this application Figure 4 ;

[0037] Figure 9Schematic diagram of time-domain candidate positions of PSS, SSS, first PBCH, and second PBCH provided by this application Figure 1 ;

[0038] Figure 10 Schematic diagram of time-domain candidate positions of PSS, SSS, first PBCH, and second PBCH provided by this application Figure 2 ;

[0039] Figure 11 Schematic diagram of time-domain candidate positions of PSS, SSS, first PBCH, and second PBCH provided by this application Figure 3 ;

[0040] Figure 12 Schematic diagram of the structure of the communication device provided by this application Figure 1 ;

[0041] Figure 13 Schematic diagram of the structure of the communication device provided by this application Figure 2 。 Detailed implementation manners

[0042] Before introducing the technical solutions of this application, relevant technical terms involved in this application are explained. It can be understood that these explanations are for making this application easier to understand and should not be regarded as limiting the protection scope required by this application.

[0043] 1. Sub-carrier

[0044] In wireless resources, the smallest resource granularity in the frequency domain can be 1 sub-carrier. This application does not limit the frequency interval between adjacent sub-carriers (i.e., sub-carrier spacing (SCS)). For example, the sub-carrier spacing can be 15 kHz, 30 kHz, 60 kHz, or 120 kHz, etc.

[0045] 2. Symbol

[0046] In wireless resources, the smallest resource granularity in the time domain can be 1 time-domain symbol, which can also be simply referred to as a symbol. This symbol is, for example, an orthogonal frequency division multiplexing (OFDM) symbol, or a discrete fourier transform-spread-OFDM (DFT-s-OFDM) symbol, etc., without limitation.

[0047] 3. Slot

[0048] In this application, one time slot may include multiple symbols that are continuous in the time domain. For example, one time slot includes 12 consecutive symbols or 14 consecutive symbols, etc.

[0049] In this application, different SCSs may correspond to different time slot lengths or symbol lengths. For example, when the SCS is 15 kHz, one time slot is 1 millisecond (ms); when the SCS is 30 kHz, one time slot is 0.5 ms.

[0050] 4. RB

[0051] In this application, one RB may include multiple subcarriers that are continuous in the frequency domain. For example, one RB includes 12 consecutive subcarriers. Among them, one subcarrier can also be referred to as one resource element (RE).

[0052] Exemplarily, taking one RB including 12 subcarriers and one time slot including 14 symbols as an example, the RB and the time slot can be as Figure 1 shown. One RB includes subcarriers 0 to subcarrier 11, and one time slot includes symbols 0 to symbol 13.

[0053] 5. SSB

[0054] The RAN node can broadcast the SSB to provide cell downlink synchronization and the basic configuration information of the cell for the terminals within its coverage area. For example, the SSB contains the PSS, SSS, and PBCH. Among them, the PSS and SSS are used for the terminal to perform downlink synchronization, and the PBCH can carry the master information block (MIB). The MIB can indicate the information of the system information block type 1 (SIB1). The terminal can receive the SIB1 according to the MIB to obtain the radio access resources and access the RAN through the radio access resources.

[0055] With the evolution of communication technologies, new radio access technologies will be introduced into the communication system. To accommodate users using the current radio access technologies, for a period of time, the communication system needs to support two or more radio access technologies. For example, on a certain spectrum, the RAN node can support terminals to access the network through different radio access technologies. Taking the RAN node supporting new radio (NR) terminals to access through the NR technology and supporting 6th generation (6G) terminals to access through the 6G technology as an example, in Figure 2On the spectrum 201 shown, the RAN node can broadcast the NR SSB on the time-frequency resource 202 and / or the time-frequency resource 205 so that the NR terminal can obtain the NR SSB and access the RAN according to the NR SSB. The RAN node can broadcast the 6G SSB on the time-frequency resource 203 and / or the time-frequency resource 204 so that the 6G terminal can obtain the 6G SSB and access the RAN according to the 6G SSB. It can be seen from the above example that the time-domain resources or frequency-domain resources occupied by the SSBs of different radio access technologies are different, and this method will result in a large overhead of radio resources.

[0056] To solve the above problems, the present application provides a communication method. In this method, the RAN node can send the PSS, SSS, the PBCH of the first radio access technology, and the PBCH of the second radio access technology. Among them, the PBCH of the first radio access technology and the PBCH of the second radio access technology can share the PSS and SSS, and the first radio access technology and the second radio access technology are different. Therefore, the terminal supporting the first radio access technology can perform downlink synchronization according to the PSS and SSS, and then demodulate the PBCH of the first radio access technology to achieve radio access. The terminal supporting the second radio access technology can perform downlink synchronization according to the PSS and SSS, and then demodulate the PBCH of the second radio access technology to achieve radio access. In addition, since the PBCH of the first radio access technology and the PBCH of the second radio access technology can share the PSS and SSS, the RAN node does not need to send the PSS and SSS respectively for the PBCH of the first radio access technology and the PBCH of the second radio access technology. Therefore, the above method can reduce the radio resource overhead.

[0057] It can be understood that the above method can be applied to various communication systems that support multiple radio access technologies. The following takes Figure 3 the communication system 3000 shown as an example for elaboration.

[0058] Please refer to Figure 3 , which is a schematic diagram of the architecture of the communication system 3000 provided by the present application. The communication system 3000 includes a RAN 100. Among them, the RAN 100 includes at least one RAN node (such as Figure 3 110a and 110b in Figure 3 , collectively referred to as 110), and may also include at least one terminal (such as Figure 3(not shown in the figure). The terminal 120 is connected to the RAN node 110 wirelessly. Terminals can be connected to each other, and RAN nodes can be connected to each other, either wired or wirelessly. The communication system 3000 may further include a core network 200. The RAN node 110 is connected to the core network 200 either wirelessly or wired. The core network devices in the core network 200 and the RAN nodes 110 in the RAN 100 may be independent and different physical devices, or may be the same physical device integrating the logical functions of the core network devices and the logical functions of the RAN nodes.

[0059] The RAN 100 may include two or more different radio access systems defined in the 3rd generation partnership project (3GPP). For example, the RAN 100 includes an NR system and a future radio access system (such as a 6G system). Another example is that the RAN 100 includes a 6G system and a radio access system after 6G. The RAN100 may also be an open RAN.

[0060] The RAN node, also known as a radio access network device, RAN entity, or access node, is used to help terminals access the communication system wirelessly. In one application scenario, the RAN node can be a base station, a transmission reception point (TRP), a next generation NodeB (gNB) in the 5th generation (5G) mobile communication system, a next generation base station in the 6th generation (6G) mobile communication system, or a base station in a future mobile communication system. The RAN node can be a macro base station (such as Figure 1 110a in Figure 1 ), or a micro base station or an indoor station (such as

[0061] In another application scenario, wireless access for a terminal can be assisted through the cooperation of multiple RAN nodes, with different RAN nodes respectively implementing partial functions of a base station. For example, the RAN nodes can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete partial or all of the functions of the physical layer. For specific descriptions of the above various protocol layers, reference can be made to the relevant technical specifications of 3GPP. The RU can be used to implement the functions of transceiver of radio frequency signals. The CU and the DU can be two independent RAN nodes, or can be integrated in the same RAN node, for example, integrated in the baseband unit (BBU). The RU can be included in radio frequency equipment, for example, included in the remote radio unit (RRU) or the active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0062] In different systems, the RAN nodes may have different names. For example, in the O-RAN system, the CU can be called an open CU (O-CU), the DU can be called an open DU (O-DU), and the RU can be called an open RU (O-RU). The RAN nodes in this application can be implemented in the form of software modules, hardware modules, or a combination of software modules and hardware modules. For example, the RAN node can be a server loaded with the corresponding software module. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the RAN nodes. For ease of description, in the following text, a base station is used as an example of a RAN node for description.

[0063] A terminal is a device with wireless transceiver capabilities that can send signals to a base station or receive signals from a base station. A terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely applied in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart home, smart office, smart wearables, smart transportation, smart city, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, airplane, ship, robot, robotic arm, smart home device, etc. Embodiments of this application do not limit the specific technologies and specific device forms adopted by the terminal.

[0064] The base station and the terminal can be in fixed positions or movable. The base station and the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airplanes, balloons, and artificial satellites. This application does not limit the application scenarios of the base station and the terminal.

[0065] The roles of the base station and the terminal can be relative. For example, Figure 3 the helicopter or drone 120i in [reference] can be configured as a mobile base station. For those terminals 120j that access the radio access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, the communication between 110a and 120i is through the radio air interface protocol. Of course, the communication between 110a and 120i can also be through the interface protocol between base stations. At this time, relative to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be uniformly referred to as communication devices. Figure 3 The 110a and 110b in [reference] can be referred to as communication devices with base station functions. Figure 3 The 120a - 120j in [reference] can be referred to as communication devices with terminal functions.

[0066] Communication can be carried out between a base station and a terminal, between base stations, and between terminals through licensed spectrum, through unlicensed spectrum, or through both licensed and unlicensed spectrum simultaneously; communication can be carried out through spectrum below 6 gigahertz (GHz), through spectrum above 6 GHz, or through both spectrum below 6 GHz and spectrum above 6 GHz simultaneously. This application does not limit the spectrum resources used for wireless communication.

[0067] In this application, the functions of the base station can also be performed by modules (such as chips) in the base station, or by a control subsystem containing base station functions. The control subsystem containing base station functions here can be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal can also be performed by modules (such as chips or modems) in the terminal, or by a device containing terminal functions.

[0068] Next, taking Figure 3 the RAN node and the terminal shown as the execution subjects for interactive illustration as an example, the communication method provided by this application will be described. For example, the RAN node in the following embodiments can be Figure 3 the RAN node 110a in Figure 3 and the first terminal can be Figure 3 the 120a in Figure 3 and the second terminal can be Figure 3 the 120b in Figure 3 . Another example is that the RAN node in the following embodiments can be

[0069] the RAN node 110b in Figure 4 and the first terminal can be

[0070] S401: The RAN node broadcasts the PSS, SSS, the first PBCH, and the second PBCH.

[0071] In this application, the first PBCH is the PBCH of the first radio access technology, and the second PBCH is the PBCH of the second radio access technology. Among them, the first radio access technology and the second radio access technology are different. For example, the first radio access technology is the NR technology (also known as 5G technology), and the second radio technology is the 6G technology; or, the first radio access technology is the 6G technology, and the second radio access technology is the radio access technology after 6G.

[0072] In this application, the first radio access technology and the second radio access technology can share spectrum resources. The RAN node transmits the PSS, SSS, the first PBCH, and the second PBCH on the dynamic spectrum sharing (DSS) bandwidth. The dynamic spectrum sharing bandwidth can be understood as the spectrum resources available for the first radio access technology and the spectrum resources available for the second radio technology partially or completely overlapping.

[0073] In a possible design, in the time domain, the number of time units occupied by the PSS and the SSS is the same, and the number of time units occupied by the first PBCH and the second PBCH is the same. For example, the PSS occupies 1 time unit, the SSS occupies 1 time unit, the first PBCH occupies 2 time units, and the second PBCH occupies 2 time units. Here, a time unit is a period of time domain resources. For example, 1 time unit is 1 symbol, or 1 time unit includes multiple consecutive symbols. In the frequency domain, the number of frequency domain units occupied by the PSS and the SSS is the same, and the number of frequency domain units occupied by the first PBCH and the second PBCH is the same. For example, the PSS occupies 127 frequency domain units, the SSS occupies 127 frequency domain units, the first PBCH occupies 240 frequency domain units, and the second PBCH occupies 240 frequency domain units. Here, a frequency domain unit is a period of frequency domain resources. For example, 1 frequency domain unit is 1 sub - carrier, or 1 frequency domain unit includes multiple consecutive sub - carriers.

[0074] Exemplarily, taking 1 time unit as 1 symbol and 1 frequency domain unit as 1 sub - carrier as an example, the PSS occupies 127 REs, the SSS occupies 127 REs, the first PBCH occupies 240 REs (or the first PBCH occupies 20 RBs), and the second PBCH occupies 240 REs (or the second PBCH occupies 20 RBs).

[0075] In a possible implementation manner, the RAN node transmits the first PBCH and the second PBCH in a frequency - division manner or a time - division manner. It can be understood that when the RAN node transmits the first PBCH and the second PBCH in a frequency - division manner, the first PBCH and the second PBCH overlap in the time domain, and the time - domain interval between the second PBCH and the synchronization signal (such as PSS or SSS) is small, which can ensure better time - domain synchronization effect for the second PBCH. When the RAN node transmits the first PBCH and the second PBCH in a time - division manner, the first PBCH and the second PBCH overlap in the frequency domain, so both of them can overlap with the PSS and the SSS in the frequency domain to ensure better frequency - domain synchronization effect for the second PBCH.

[0076] The following will be described in combination with time division scenarios and frequency division scenarios respectively. In the following description, it is taken as an example that the PSS occupies the first time unit, the SSS occupies the second time unit, the second PBCH occupies the third and fourth time units, and the first PBCH occupies the fifth and sixth time units to introduce the time-frequency resource occupation situations of the PSS, SSS, first PBCH, and second PBCH. Among them, any one of the first to sixth time units may include at least one symbol.

[0077] Time division scenario: The two time units occupied by the first PBCH and the two time units occupied by the second PBCH do not overlap, and the frequency domain resources occupied by the first PBCH and the frequency domain resources occupied by the second PBCH overlap. Among them, the overlap of the frequency domain resources occupied by the first PBCH and the frequency domain resources occupied by the second PBCH can be understood as that the frequency domain units occupied by the first PBCH and the frequency domain units occupied by the second PBCH are completely the same or partially the same. For example, the first PBCH occupies subcarriers 0 to 239, and the second PBCH also occupies subcarriers 0 to 239; or, the first PBCH occupies subcarriers 0 to 239, and the second PBCH occupies subcarriers 120 to 359; or, the first PBCH occupies subcarriers 120 to 359, and the second PBCH also occupies subcarriers 110 to 369.

[0078] In a possible design, the second time unit is located after the first time unit and is separated from the first time unit by 1 time unit, the fifth time unit is located after the first time unit and is adjacent to the first time unit, and the sixth time unit is located after the first time unit and is separated from the first time unit by 2 time units. The third time unit is different from the first, second, fifth, and sixth time units, and the fourth time unit is also different from the first, second, fifth, and sixth time units. That is to say, the third time unit and / or the fourth time unit may be located before the first time unit or after the sixth time unit.

[0079] In one case (denoted as case 1), the third time unit is located after the first time unit and is separated from the first time unit by 3 time units, and the fourth time unit is located after the first time unit and is separated from the first time unit by 4 time units.

[0080] Exemplarily, taking the frequency domain resources occupied by the PSS and the SSS as the same, and the frequency domain resources occupied by the first PBCH and the frequency domain resources occupied by the second PBCH as the same as an example, the positional relationship between the first to sixth time units can be as Figure 5 shown. In Figure 5Among them, the first time unit is time unit 0, the second time unit is time unit 2, the fifth time unit is time unit 1, the sixth time unit is time unit 3, the third time unit is time unit 4, and the fourth time unit is time unit 5.

[0081] In another case (denoted as case 2), the third time unit is before the first time unit and is separated from the first time unit by 1 time unit, and the fourth time unit is before the first time unit and is adjacent to the first time unit.

[0082] Exemplarily, taking the frequency domain resources occupied by PSS being the same as those occupied by SSS, and the frequency domain resources occupied by the first PBCH being the same as those occupied by the second PBCH as an example, the positional relationship among the first time unit to the sixth time unit can be as Figure 6 shown. In Figure 6 Among them, the first time unit is time unit 2, the second time unit is time unit 4, the fifth time unit is time unit 3, the sixth time unit is time unit 5, the third time unit is time unit 0, and the fourth time unit is time unit 1.

[0083] To more clearly understand the specific frequency domain resources occupied by PSS, SSS, the first PBCH, and the second PBCH. Here, taking PSS occupying 127 subcarriers, SSS occupying 127 subcarriers, the first PBCH occupying 240 subcarriers, and the second PBCH occupying 240 subcarriers as an example for introduction. If the positional relationship among the first time unit to the sixth time unit is as Figure 5 shown, then the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH can be as Figure 7 shown.

[0084] It can be understood that when the positional relationship among the first time unit to the sixth time unit is as Figure 6 shown, the frequency domain resources occupied by PSS, SSS, the first PBCH, and the second PBCH are similar to those of PSS, SSS, the first PBCH, and the second PBCH shown in Figure 7 and will not be elaborated here.

[0085] It can be understood that Figure 7 the time-frequency resources occupied by PSS, SSS, the first PBCH, and the second PBCH shown are only exemplary. In specific applications, PSS, SSS, the first PBCH, or the second PBCH can occupy more or fewer time-frequency resources than those shown in Figure 7 . For example, the number of frequency domain units occupied by the second PBCH can be greater than 240.

[0086] Frequency division scenario: The two time units occupied by the first PBCH are the same as the two time units occupied by the second PBCH, and the frequency domain resources occupied by the first PBCH do not overlap with the frequency domain resources occupied by the second PBCH.

[0087] In a possible design, the second time unit is located after the first time unit and is separated from the first time unit by 1 time unit. The third time unit and the fifth time unit are located after the first time unit and are adjacent to the first time unit. The fourth time unit and the sixth time unit are located after the first time unit and are separated from the first time unit by 2 time units.

[0088] Exemplarily, taking the case where the frequency domain resources occupied by the PSS are the same as those occupied by the SSS as an example, the positional relationship among the first time unit to the sixth time unit can be as Figure 8 shown. In Figure 8 , the first time unit is time unit 0, the second time unit is time unit 2, the third time unit and the fifth time unit are time unit 1, and the fourth time unit and the sixth time unit are time unit 3.

[0089] It can be understood that Figure 5 , Figure 6 or Figure 8 are only examples of the time-frequency resources occupied by the PSS, SSS, the first PBCH, and the second PBCH. In specific applications, the time-frequency resources occupied by the PSS, SSS, the first PBCH, and the second PBCH can also be in other forms. For example, in the time division scenario, the third time unit can be located before the first time unit, and the fourth time unit can be located after the first time unit. Also, for example, in the frequency division scenario, if the vertical axis represents the frequency domain resources, the frequency domain resources occupied by the second PBCH can be all above or below the frequency domain resources occupied by the first PBCH.

[0090] In addition, in the frequency division scenario, the frequency domain resources occupied by the PSS, SSS, and the first PBCH are similar to the frequency domain resources occupied by the PSS, SSS, and the first PBCH as Figure 7 shown, and the time domain resources occupied by the second PBCH are different. For example, the time-frequency resource 801 in Figure 7 can be configured according to the resource mapping rule of the second PBCH corresponding to time unit 4 and subcarriers 0 to subcarrier x in Figure 8 , the time-frequency resource 802 in Figure 7 can be configured according to the resource mapping rule of the second PBCH corresponding to time unit 4 and subcarriers x + 1 to subcarrier 239 in Figure 8 , and the time-frequency resource can be configured according to the resource mapping rule of the second PBCH corresponding to time unit 5 and subcarriers 0 to subcarrier x in Figure 7 ​Figure 8 the time-frequency resource 803 in Figure 7 is configured according to the resource mapping rule of the second PBCH corresponding to the time unit 4 and subcarriers x + 1 to 239 in Figure 8 the time-frequency resource 804 in. Where x is a positive integer less than 240.

[0091] In this application, PSS, SSS, the first PBCH, and the second PBCH can be divided according to radio access technology. For example, PSS, SSS, and the first PBCH can be regarded as one SSB, and PSS, SSS, and the second PBCH can be regarded as another SSB. In other words, the RAN node can determine the first SSB of the first radio access technology, and the first SSB includes PSS, SSS, and the first PBCH. The RAN node can also determine the second SSB of the second radio access technology, and the second SSB includes PSS, SSS, and the second PBCH. Of course, PSS, SSS, the first PBCH, and the second PBCH can also be regarded as one SSB. In other words, the RAN node can determine the third SSB, and the third SSB includes PSS, SSS, the first PBCH, and the second PBCH. In this application, the SSB can also be replaced by a synchronization signal (SS) / PBCH block.

[0092] In this application, the first PBCH and the second PBCH can share PSS and SSS. In other words, a terminal supporting the first radio access technology and a terminal supporting the second radio access technology can perform downlink synchronization based on the same synchronization signal (including PSS and SSS), but will demodulate different PBCHs based on the downlink synchronization. Specifically, a terminal supporting the first radio access technology can receive PSS, SSS, and the first PBCH, perform downlink synchronization according to PSS and SSS, and demodulate the first PBCH based on the downlink synchronization. A terminal supporting the second radio access technology can receive PSS, SSS, and the second PBCH, perform downlink synchronization according to PSS and SSS, and demodulate the second PBCH based on the downlink synchronization. For example, Figure 4 the method shown can further include the following steps:

[0093] S402: The first terminal performs downlink synchronization according to PSS and SSS, and demodulates the first PBCH.

[0094] S403: The second terminal performs downlink synchronization according to PSS and SSS, and demodulates the second PBCH.

[0095] In this application, the first terminal is a terminal supporting the first radio access technology. The first terminal can perform downlink synchronization based on the PSS and SSS, demodulate the first PBCH based on the downlink synchronization to obtain the first MIB, obtain the random access resources according to the first MIB, and then initiate random access. Similarly, the second terminal is a terminal supporting the second radio access technology. The second terminal can perform downlink synchronization based on the PSS and SSS, demodulate the second PBCH based on the downlink synchronization to obtain the second MIB, obtain the random access resources according to the second MIB, and then initiate random access.

[0096] It can be understood that this application does not limit the execution order of S402 and S403. For example, S402 can be executed first and then S403, or S403 can be executed first and then S402, or S402 and S403 can be executed simultaneously.

[0097] Based on Figure 4 the method shown, the RAN node can broadcast the PSS, SSS, the first PBCH, and the second PBCH, so that the first terminal can perform downlink synchronization based on the PSS and SSS, and then demodulate the first PBCH to achieve wireless access. It can also enable the second terminal to perform downlink synchronization based on the PSS and SSS, and then demodulate the second PBCH to achieve wireless access. In Figure 4 the method shown, the first PBCH and the second PBCH can share the PSS and SSS, so the RAN node does not need to separately send the PSS and SSS for the first PBCH and the second PBCH. Therefore, the above method can reduce the wireless resource overhead and thus improve the wireless resource utilization rate.

[0098] Optionally, in Figure 4 a possible implementation manner of the method shown, the first time unit to the sixth time unit are located in the same time unit set. This time unit set can include K consecutive time units in the time domain, where K is a positive integer. For example, 1 time unit set is 1 millisecond and K is 5. The candidate position of the time unit with the earliest time domain position among the first time unit to the sixth time unit (hereinafter referred to as the starting time unit) is related to the carrier frequency and the subcarrier spacing of the SSB. This carrier frequency is the frequency of the carrier carrying the PSS, SSS, the first PBCH, and the second PBCH, and this subcarrier spacing is the subcarrier spacing of the SSB signal. Here, the SSB can refer to the first SSB, the second SSB, or the third SSB mentioned above. Therefore, based on the above method, the candidate position of the starting time unit can be determined, and combined with the position relationship of the first time unit to the sixth time unit introduced above, the time domain candidate positions of the PSS, SSS, the first PBCH, and the second PBCH can be determined.

[0099] A possible design, in a set of time units, the index T of the starting time unit may satisfy the following relationship: T = m + M×n. Wherein, m, M, and n can be determined according to the carrier frequency and the subcarrier spacing of the SSB.

[0100] To better understand the method provided in this application, the following will take SCS of 15 kHz and 30 kHz as examples for introduction respectively. For the convenience of description, in the following examples, 1 time unit is 1 symbol, and 1 set of time units is 5 milliseconds.

[0101] (1) When SCS is equal to 15 kHz, M is equal to 14, m is equal to 0, 2, 6, or 8, and n is equal to 0, 1, 2, or 3.

[0102] Exemplarily, for the above case 1, T = {2, 8} + 14×n. When the carrier frequency belongs to the frequency domain range 1 (FR1) and is less than or equal to 3 GHz, n is equal to 0 or 1. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0, 1, 2, or 3. Wherein, the corresponding frequency domain range of FR1 is 410 MHz to 7125 MHz. Taking m equal to 2 and n equal to 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 2 to 7, specifically as shown in Figure 9 as shown in (a). Taking m equal to 8 and n equal to 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 8 to 13, specifically as shown in Figure 9 as shown in (b). It can also be understood that when the carrier frequency is less than or equal to 3 GHz, within the 5 - millisecond time unit, the starting time units of the SSB candidates include symbol 2 + 14×0 = 2, 8 + 14×0 = 8, 2 + 14×1 = 16, and 8 + 14×1 = 22.

[0103] Exemplarily, for the above case 2, T = {0, 6} + 14×n. When the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0 or 1. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0, 1, 2, or 3. Taking m equal to 0 and n equal to 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 0 to 5, specifically as shown in Figure 10 as shown in (a). Taking m equal to 6 and n equal to 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 6 to 11, specifically as shown in Figure 10 as shown in (b).

[0104] Exemplarily, for the above frequency division scenario, T = {2, 8} + 14×n. When the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0 or 1. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0, 1, 2, or 3. Taking m = 2 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 2 to 5, specifically as shown in Figure 11 as shown in (a) of Figure 11 . Taking m = 8 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 8 to 11, specifically as shown in

[0105] (2) When SCS is equal to 30 kHz, M = 28, m = 2, 8, 14, or 20, and n = 0 or 1.

[0106] Exemplarily, for the above Case 1, T = {8, 20} + 28×n. When the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0 or 1. Taking m = 8 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 8 to 13. Taking m = 20 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 20 to 25.

[0107] Exemplarily, for the above Case 2, T = {2, 14} + 28×n. When the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0 or 1. Taking m = 2 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 2 to 7. Taking m = 14 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 14 to 19.

[0108] Exemplarily, for the above frequency division scenario, T = {8, 20} + 28×n. When the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0. When the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0 or 1. Taking m = 8 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 8 to 11. Taking m = 20 and n = 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 20 to 23.

[0109] (3) When SCS is equal to 30 kHz, M is equal to 14, m is equal to 0, 2, 6 or 8, and n is equal to 0, 1, 2 or 3.

[0110] Exemplarily, for the above case 1, T = {2, 8} + 14×n. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1, and is less than or equal to 3 GHz, n is equal to 0 or 1. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1, and is greater than 3 GHz, n is equal to 0, 1, 2 or 3. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1, and is less than or equal to 2.4 GHz, n is equal to 0 or 1. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1, and is greater than 2.4 GHz, n is equal to 0, 1, 2 or 3. Taking m equal to 2 and n equal to 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 2 to 7. Taking m equal to 8 and n equal to 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 8 to 13. Taking m equal to 2 and n equal to 1 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 16 to 21. Taking m equal to 8 and n equal to 1 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 22 to 27.

[0111] Exemplarily, for the above case 2, T = {0, 6} + 14×n. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1, and is less than or equal to 3 GHz, n is equal to 0 or 1. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1, and is greater than 3 GHz, n is equal to 0, 1, 2 or 3. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1, and is less than or equal to 2.4 GHz, n is equal to 0 or 1. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1, and is greater than 2.4 GHz, n is equal to 0, 1, 2 or 3. Taking m equal to 0 and n equal to 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 0 to 5. Taking m equal to 6 and n equal to 0 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 6 to 11. Taking m equal to 0 and n equal to 1 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 14 to 19. Taking m equal to 6 and n equal to 1 as an example, the time-domain candidate positions of PSS, SSS, the first PBCH and the second PBCH are symbols 20 to 25.

[0112] Exemplarily, for the above frequency division scenario, T = {2, 8} + 14×n. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1 and is less than or equal to 3 GHz, n is equal to 0 or 1. When the spectrum is a symmetric spectrum, the carrier frequency belongs to FR1 and is greater than 3 GHz, n is equal to 0, 1, 2, or 3. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1 and is less than or equal to 2.4 GHz, n is equal to 0 or 1. When the spectrum is an asymmetric spectrum, the carrier frequency belongs to FR1 and is greater than 2.4 GHz, n is equal to 0, 1, 2, or 3. Taking m = 2 and n = 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 2 to 5. Taking m = 8 and n = 0 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 8 to 11. Taking m = 2 and n = 1 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 16 to 19. Taking m = 8 and n = 1 as an example, the time domain candidate positions of PSS, SSS, the first PBCH, and the second PBCH are symbols 22 to 25.

[0113] It can be understood that in order to implement the functions in the above embodiments, the RAN node includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in this application, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application scenario and design constraint conditions of the technical solution.

[0114] Figure 12 and Figure 13 is a schematic structural diagram of a possible communication device provided by the embodiments of this application. These communication devices can be used to implement the functions of the RAN node in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of this application, the communication device can be the RAN node 110 as shown in Figure 3 or can also be a module (such as a chip) applied to the RAN node.

[0115] As Figure 12 shown, the communication device 1200 includes a processing unit 1210 and a transceiver unit 1220. The communication device 1200 is used to implement the functions of the RAN node in the above Figure 4 shown method embodiments.

[0116] When the communication device 1200 is used to implement Figure 4In the method shown, the functions of the RAN node are as follows: The processing unit 1210 is used to control the transceiver unit 1220 to send the PSS, SSS, the first PBCH, and the second PBCH.

[0117] For a more detailed description of the above processing unit 1210 and transceiver unit 1220, reference can be made to Figure 4 the relevant description in the method shown.

[0118] As Figure 13 shown, the communication device 1300 includes a processor 1310 and an interface circuit 1320. The processor 1310 and the interface circuit 1320 are coupled to each other. It can be understood that the interface circuit 1320 can be a transceiver or an input / output interface. Optionally, the communication device 1300 may further include a memory 1330, which is used to store instructions executed by the processor 1310 or store input data required for the processor 1310 to run instructions or store data generated after the processor 1310 runs instructions. Sometimes, the interface circuit 1320 can also be understood as a part of the processor 1310. In this case, the communication device 1300 includes the processor 1310.

[0119] When the communication device 1300 is used to implement Figure 4 the method shown, the processor 1310 is used to implement the functions of the above processing unit 1210, and the interface circuit 1320 is used to implement the functions of the above transceiver unit 1220.

[0120] When the above communication device is a chip applied to a RAN node, the RAN node chip implements the functions of the RAN node in the above method embodiment. The RAN node chip sends information to the terminal. It can be understood that this information is sent to other modules (such as a radio frequency module or an antenna) in the RAN node, and then these modules send it to the terminal.

[0121] In this application, when entity A sends information to entity B, it can be that A directly sends it to B, or A indirectly sends it to B through other entities. Similarly, when entity B receives information from entity A, it can be that entity B directly receives the information sent by entity A, or entity B indirectly receives the information sent by entity A through other entities. Here, entity A and B can be a RAN node or a terminal, or a module inside a RAN node or a terminal. The sending and receiving of information can be information interaction between a RAN node and a terminal. For example, information interaction between a base station and a terminal; the sending and receiving of information can also be information interaction between two RAN nodes. For example, information interaction between a CU and a DU; the sending and receiving of information can also be information interaction between different modules inside a device. For example, information interaction between a RAN node chip and other modules in the RAN node.

[0122] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0123] The method steps in the embodiments of the present application may be implemented in hardware or in software instructions executable by a processor. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium may also be a component of the processor. The processor and the storage medium may be located in an ASIC. Additionally, the ASIC may be located in a RAN node or a terminal. The processor and the storage medium may also exist as discrete components in a RAN node.

[0124] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0125] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0126] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the written description of the present application, the character " / " generally represents an "or" relationship between the associated objects before and after. "Including at least one of A, B, and C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0127] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The magnitude of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic.

[0128] It can be understood that the message names between the network elements in the above embodiments of the present application or the names of the parameters in the messages are only examples, and in specific implementations, other names may also be used. The present application does not make specific limitations in this regard.

[0129] It can be understood that in the present application, "when...", "in the case of...", "if", and "when" all refer to corresponding processing being performed under certain objective circumstances, not limited to time, and it is not required that there must be a judgment action during implementation, nor does it mean there are other limitations.

[0130] Optionally, the present application further provides a chip system, including: at least one processor and an interface. The at least one processor is coupled to a memory through the interface. When the at least one processor executes a computer program or instruction in the memory, the method in any of the above method embodiments is executed. In a possible implementation manner, the chip system further includes a memory. Optionally, the chip system may be composed of chips or may include chips and other discrete devices. The present application does not make specific limitations in this regard.

[0131] Optionally, the present application further provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program instructing relevant hardware. The program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the communication device in any of the foregoing embodiments, such as the hard disk or memory of the communication device. The above computer-readable storage medium can also be an external storage device of the communication device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the communication device. Further, the above computer-readable storage medium can also include both the internal storage unit and the external storage device of the communication device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the communication device. The above computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0132] Optionally, the present application further provides a computer program product. All or part of the processes in the above method embodiments can be completed by a computer program instructing relevant hardware. The program can be stored in the above computer program product. When the program is executed, it can include the processes of the above method embodiments.

[0133] Optionally, the present application also provides a computer instruction. All or part of the processes in the above method embodiments can be completed by a computer instruction to instruct related hardware (such as a computer, a processor, or a RAN node, etc.). The program can be stored in the above computer-readable storage medium or the above computer program product.

[0134] Optionally, the present application also provides a communication system, including: the RAN node and the second terminal in the above embodiments. Optionally, the communication system further includes the first terminal in the above embodiments.

[0135] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the division of the above function modules is used as an example. In actual applications, the above functions can be allocated to different function modules according to needs, that is, the internal structure of the device is divided into different function modules to complete all or part of the functions described above.

[0136] In several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the module or unit is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0137] The unit described as a separated component may or may not be physically separated. The component displayed as a unit may be a physical unit or multiple physical units, that is, it can be located in one place, or it can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] In addition, each functional unit in the various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0139] As described above, only the specific embodiments of the present application are provided, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, The method includes: Determine a first synchronization signal block of a first radio access technology, where the first synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, and a first physical broadcast channel; Determine a second synchronization signal block of a second radio access technology, where the second synchronization signal block includes the primary synchronization signal, the secondary synchronization signal, and a second physical broadcast channel; Transmit the primary synchronization signal, the secondary synchronization signal, the first physical broadcast channel, and the second physical broadcast channel. The primary synchronization signal and the secondary synchronization signal each occupy 1 time unit in the time domain. The first physical broadcast channel occupies 2 time units in the time domain, and the second physical broadcast channel occupies 2 time units in the time domain. The first radio access technology and the second radio access technology are different.

2. The method according to claim 1, characterized in that, The 2 time units occupied by the first physical broadcast channel and the 2 time units occupied by the second physical broadcast channel do not overlap, and the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel overlap.

3. The method according to claim 2, wherein The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is after the first time unit and is separated from the first time unit by 3 time units; The fourth time unit is after the first time unit and is separated from the first time unit by 4 time units.

4. The method according to claim 2, characterized in that The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is before the first time unit and is separated from the first time unit by 1 time unit; The fourth time unit is before the first time unit and is adjacent to the first time unit.

5. The method according to claim 1, wherein The 2 time units occupied by the first physical broadcast channel and the 2 time units occupied by the second physical broadcast channel are the same, and the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel do not overlap.

6. The method according to claim 5, characterized in that, The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is after the first time unit and is adjacent to the first time unit; The fourth time unit is after the first time unit and is separated from the first time unit by 2 time units.

7. A communication device, characterized in that, The communication device includes: a processing unit and a transceiver unit; The processing unit is configured to determine a first synchronization signal block of a first radio access technology, where the first synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, and a first physical broadcast channel; The processing unit is further configured to determine a second synchronization signal block of a second radio access technology, where the second synchronization signal block includes the primary synchronization signal, the secondary synchronization signal, and a second physical broadcast channel; The transceiver unit is configured to transmit the primary synchronization signal, the secondary synchronization signal, the first physical broadcast channel, and the second physical broadcast channel. The primary synchronization signal and the secondary synchronization signal each occupy 1 time unit in the time domain. The first physical broadcast channel occupies 2 time units in the time domain. The second physical broadcast channel occupies 2 time units in the time domain. The first radio access technology and the second radio access technology are different.

8. The communication device according to claim 7, wherein The 2 time units occupied by the first physical broadcast channel and the 2 time units occupied by the second physical broadcast channel do not overlap, and the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel overlap.

9. The communication device according to claim 8, characterized in that, The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is after the first time unit and is separated from the first time unit by 3 time units; The fourth time unit is after the first time unit and is separated from the first time unit by 4 time units.

10. The communication device according to claim 8, characterized in that, The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is before the first time unit and is separated from the first time unit by 1 time unit; The fourth time unit is before the first time unit and is adjacent to the first time unit.

11. The communication device according to claim 7, wherein The 2 time units occupied by the first physical broadcast channel and the 2 time units occupied by the second physical broadcast channel are the same, and the frequency domain resources occupied by the first physical broadcast channel and the frequency domain resources occupied by the second physical broadcast channel do not overlap.

12. The communication device according to claim 11, wherein The primary synchronization signal occupies a first time unit, the secondary synchronization signal occupies a second time unit, and the second physical broadcast channel occupies a third time unit and a fourth time unit; The second time unit is after the first time unit and is separated from the first time unit by 1 time unit; The third time unit is after the first time unit and is adjacent to the first time unit; The fourth time unit is after the first time unit and is separated from the first time unit by 2 time units.

13. A communication device, characterized in that, It includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices and transmit them to the processor or send signals from the processor to other communication devices. The processor is used to implement the method according to any one of claims 1 to 6 through logic circuits or by executing code instructions.

14. A computer-readable storage medium, characterized in that, A computer program or instructions are stored in the storage medium. When the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 6 is implemented.

15. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 6 is implemented.

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