Communication method and device

Abstract

The invention provides a communication method and device. The method comprises the following steps: receiving a first common signal; determining an initial frequency domain position of the first public resource block according to the frequency domain position of the first public signal and the first configuration; wherein the first configuration indicates the frequency domain position of the second common signal, the frequency domain position of the first common signal is different from the frequency domain position of the second common signal, and the first common resource block is a common resource block where the starting frequency domain position of the first common signal is located. By adopting the method, the coverage performance of the public signals can be ensured, the specific contents borne by different public signals can be the same, and the terminal is not influenced to combine and receive the specific contents borne in the detected public signals.

Description

Technical Field

[0001] This application relates to the field of communications, and particularly to a communication method and apparatus. Background Art

[0002] With the evolution of wireless networks, the bandwidth required by communication systems is getting larger and larger. For example, new-generation wireless networks and products may use frequency bands higher than the current 5G as the main commercial frequency bands, such as using 6G or above 6G (U6G) frequency bands as the main commercial frequency bands. Compared with the existing 5G network frequency bands, the 6G or U6G frequency bands have richer spectrum resources and larger available bandwidths. From the perspective of wireless transmission characteristics, a higher transmission frequency also means greater channel fading at the same transmission distance. Therefore, the coverage performance of various signals in the 6G or U6G scenarios is somewhat lost compared with the networks using the existing frequency bands.

[0003] In the 6G or U6G scenarios, there are also problems with the coverage performance of the transmission of synchronization signal blocks (SSBs) and other common signals. For example, taking the SSB as an example, a terminal needs to detect the SSB before accessing the base station. Since the base station cannot know the specific location of the terminal, it cannot perform fine beam alignment when sending the SSB (or rather, the base station can only send with a relatively wide beam), and thus cannot obtain the beamforming gain brought by it. At the same time, due to the further increase in the service frequency point, the influence of large-scale fading (path loss) is further increased, which will also significantly affect the reception performance and coverage performance of the SSB.

[0004] Therefore, how to improve the reception performance and coverage performance of common signals such as SSBs is an issue worthy of attention. Summary of the Invention

[0005] Embodiments of this application provide a communication method and apparatus for improving the reception success rate of common signals.

[0006] In a first aspect, this application provides a communication method, which can be executed by a terminal or a module (such as a chip) in the terminal. The method includes: receiving a first common signal; determining a starting frequency-domain position of a first common resource block according to a frequency-domain position of the first common signal and a first configuration; where the first configuration indicates a frequency-domain position of a second common signal, the frequency-domain position of the first common signal is different from the frequency-domain position of the second common signal, and the first common resource block is the common resource block where the starting frequency-domain position of the first common signal is located.

[0007] Using the above method, the terminal can determine the starting frequency-domain position of the first common resource block based on the frequency-domain position of the first common signal and the frequency-domain position of the second common signal indicated by the first configuration. That is to say, when the terminal device receives any common signal, it can know the starting frequency-domain position of the correct common resource block based on the first configuration and the frequency-domain position of the detected common signal. That is to say, when the specific content carried by different common signals is the same, the terminal can also know the starting frequency-domain position of the correct common resource block. Furthermore, the terminal can merge and receive the specific content carried in the common signals detected in multiple periods, which can improve the coverage performance / reception performance of the common signal.

[0008] In a possible design, the first configuration indicates the frequency-domain positions of multiple common signals, and the frequency-domain positions of the multiple common signals include the frequency-domain position of the first common signal and the frequency-domain position of the second common signal. The multiple common signals are of the same type.

[0009] In a possible design, determining the starting frequency-domain position of the first common resource block based on the frequency-domain position of the first common signal and the first configuration may adopt but is not limited to the following method: determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and the first offset, where the first offset is the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of the second common resource block, and the second common resource block is the common resource block where the starting frequency-domain position of the second common signal is located. With the above design, different terminals can determine the common resource block corresponding to the received common signal based on the same first offset. Therefore, the specific content carried by multiple common signals can be the same, which does not affect the terminal's merging and receiving of the content carried in the common signals detected in multiple periods, and can improve the coverage performance / reception performance of the common signal. For example, in the scenario of transmitting multiple SSBs in frequency division, different terminals can determine the CRB corresponding to the received SSB based on the same first offset. Therefore, multiple SSBs can carry the same MIB, enabling the terminal device to merge and receive the MIBs with different frequency-domain positions in multiple transmission periods, improving the coverage performance / reception performance of the MIB (SSB).

[0010] In a possible design, the first common signal carries the first offset, or the first offset is predefined.

[0011] In a possible design, determining the starting frequency-domain position of the first common resource block based on the frequency-domain position of the first common signal, the first configuration, and the first offset may be implemented in, but not limited to, the following manner: determining a third offset based on the first offset and a second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0012] In a possible design, the third offset = (the first offset value + the second offset value) mod (C * X); where X = max(1, 2 μ ),2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0013] In a possible design, determining the starting frequency-domain position of the first common resource block based on the frequency-domain position of the first common signal and the first configuration may be implemented in, but not limited to, the following manner: determining a third offset based on a second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block. With the above design, the specific content carried by multiple common signals may be the same, and the terminal combines and receives the content carried by the common signals detected in multiple periods, which can improve the coverage performance / reception performance of the common signals. For example, in the scenario of transmitting multiple SSBs in frequency division, the terminal can determine the CRB corresponding to the received SSB, and multiple SSBs can carry the same MIB, enabling the terminal device to combine and receive the MIBs with different frequency-domain positions in multiple periods, improving the coverage performance / reception performance of the MIB (SSB).

[0014] In a possible design, the third offset = the second offset value mod (C * X); where X = max(1, 2 μ ),

[0015] 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0016] In a possible design, the third offset is M, and M represents M subcarriers at the subcarrier spacing of the first common signal, where M is a non-negative integer.

[0017] In a possible design, the third offset is determined according to one or more of the first offset, the second offset, the subcarrier spacing of the first common resource block, or the subcarrier spacing of the first common signal.

[0018] In a possible design, the center frequencies of some or all of the plurality of common signals are located in the same synchronization grid. Or, the center frequencies of some or all of the plurality of common signals are at the same frequency positions as those of a synchronization grid.

[0019] In a possible design, the frequency of the synchronization grid is the center frequency of the transmission pattern formed by the plurality of common signals, or the frequency of the synchronization grid is the center frequency of the common signal with the lowest frequency domain position among the plurality of common signals, or the frequency of the synchronization grid is the center frequency of the common signal with the highest frequency domain position among the plurality of common signals, or the frequency of the synchronization grid is the center frequency of the second common signal, the start frequency domain position of the second common signal, or the end frequency domain position of the second common signal.

[0020] In a possible design, there is at least partial overlap between the time domain position of the first common signal and the time domain position of the second common signal.

[0021] In a second aspect, the present application provides a communication method, which can be executed by a base station or a module (such as a chip) in the base station. The method includes: sending a first common signal, where the start frequency domain position of the first common resource block is determined according to the frequency domain position of the first common signal and a first configuration; wherein, the first configuration indicates the frequency domain position of a second common signal, and the frequency domain position of the first common signal is different from the frequency domain position of the second common signal; the first common resource block is the common resource block where the start frequency domain position of the first common signal is located.

[0022] In a possible design, the first configuration indicates the frequency domain positions of a plurality of common signals, and the frequency domain positions of the plurality of common signals include the frequency domain position of the first common signal and the frequency domain position of the second common signal; when sending the first common signal, the first common signal is sent according to the first configuration.

[0023] In a possible design, the second common signal is sent.

[0024] In a possible design, a third common signal is sent. The frequency-domain position of the third common signal is the same as that of the first common signal, and the time-domain positions of the first common signal and the second common signal do not overlap. The third common resource block is the same as the first common resource block, and the third common resource block is the common resource block where the starting frequency-domain position of the third common signal is located.

[0025] In a possible design, at least partial overlap exists between the time-domain positions of the first common signal and the second common signal.

[0026] Some possible designs and beneficial effects of the second aspect can refer to the first aspect and will not be elaborated here.

[0027] In a third aspect, the present application provides a communication method, which can be executed by a base station or a module (such as a chip) in the base station. The method includes: sending a first common signal, where there is an interval of Z frequency-domain units between the starting frequency-domain position of the first common signal and the starting frequency-domain position of a second common signal. Z is an integer multiple of X, and X = max(1, 2 μ ) and 2 μ is the ratio of the first SCS to the second SCS. The first SCS is the SCS of the common resource block, the second SCS is the SCS of the first common signal, and the SCS of the first common signal is the same as the SCS of the second common signal. The frequency-domain positions of the first common signal and the second common signal are different, and Z is a positive integer. By using the above method, the frequency-domain interval between each common signal is determined according to the SCS of the common resource block and the SCS of the common signal, so that the offset value between the starting frequency-domain position of each common signal and the starting frequency-domain position of the corresponding common resource block is consistent. Furthermore, the terminal can determine the frequency-domain position of the common resource block corresponding to the received common signal based on the same first offset.

[0028] In a possible design, the second common signal is sent.

[0029] In a possible design, the Z frequency-domain units are Z frequency-domain units under the second SCS.

[0030] In a possible design, the first common signal carries a first offset, the second common signal carries the first offset, or the first offset is predefined;

[0031] The first offset is the offset of the starting frequency domain position of the second common signal relative to the starting frequency domain position of the second common resource block. The first offset is also the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the first common resource block. The first common resource block is the common resource block where the starting frequency domain position of the first common signal is located, and the second common resource block is the common resource block where the starting frequency domain position of the second common signal is located.

[0032] In a possible design, at least part of the time domain positions of the first common signal and the second common signal overlap.

[0033] Some possible designs and beneficial effects of the third aspect can refer to the first aspect and will not be elaborated here.

[0034] In a fourth aspect, the present application provides a communication device, which includes a transceiver unit and a processing unit: the transceiver unit is configured to receive a first common signal; the processing unit is configured to determine the starting frequency domain position of a first common resource block according to the frequency domain position of the first common signal and a first configuration; where the first configuration indicates the frequency domain position of a second common signal, the frequency domain position of the first common signal is different from the frequency domain position of the second common signal, and the first common resource block is the common resource block where the starting frequency domain position of the first common signal is located.

[0035] In a possible design, the first configuration indicates the frequency domain positions of multiple common signals, and the frequency domain positions of the multiple common signals include the frequency domain position of the first common signal and the frequency domain position of the second common signal.

[0036] In a possible design, when determining the starting frequency domain position of the first common resource block according to the frequency domain position of the first common signal and the first configuration, the processing unit determines the starting frequency domain position of the first common resource block according to the frequency domain position of the first common signal, the first configuration, and a first offset, where the first offset is the offset of the starting frequency domain position of the second common signal relative to the starting frequency domain position of the second common resource block, and the second common resource block is the common resource block where the starting frequency domain position of the second common signal is located.

[0037] In a possible design, the first common signal carries the first offset, or the first offset is predefined.

[0038] In a possible design, when determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and the first offset, the processing unit determines a third offset according to the first offset and the second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0039] In a possible design, the third offset = (the first offset value + the second offset value) mod (C * X); where X = max(1, 2 μ ),2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0040] In a possible design, when determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal and the first configuration, the processing unit determines a third offset according to the second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0041] In a possible design, the third offset = the second offset value mod (C * X); where X = max(1, 2 μ ),

[0042] 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0043] In a possible design, the third offset is M, where M represents M subcarriers at the subcarrier spacing of the first common signal, and M is a non-negative integer.

[0044] In a possible design, the third offset is determined according to one or more of the first offset, the second offset, the subcarrier spacing of the first common resource block, or the subcarrier spacing of the first common signal.

[0045] In a possible design, the center frequencies of some or all of the multiple common signals are located in the same synchronization grid. Or rather, the center frequencies of some or all of the multiple common signals are at the same frequency positions as those of a synchronization grid.

[0046] In a possible design, the frequency point of the synchronization grid is the center frequency point of the transmission pattern composed of the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the common signal with the lowest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the common signal with the highest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the second common signal, the start frequency domain position of the second common signal, or the end frequency domain position of the second common signal.

[0047] In a possible design, there is at least partial overlap between the time domain positions of the first common signal and the second common signal.

[0048] Some possible designs and beneficial effects of the fourth aspect can refer to the first aspect and will not be elaborated here.

[0049] In a fifth aspect, the present application provides a communication device, which includes a transceiver unit and a processing unit: the transceiver unit is used for receiving and transmitting information; the processing unit is used for transmitting a first common signal through the transceiver unit, and the start frequency domain position of the first common resource block is determined according to the frequency domain position of the first common signal and a first configuration; wherein, the first configuration indicates the frequency domain position of a second common signal, and the frequency domain position of the first common signal is different from the frequency domain position of the second common signal; the first common resource block is the common resource block where the start frequency domain position of the first common signal is located.

[0050] In a possible design, the first configuration indicates the frequency domain positions of multiple common signals, and the frequency domain positions of the multiple common signals include the frequency domain position of the first common signal and the frequency domain position of the second common signal; the transceiver unit is used for transmitting the first common signal according to the first configuration when transmitting the first common signal.

[0051] In a possible design, the transceiver unit is used for transmitting the second common signal.

[0052] In a possible design, the transceiver unit is used for transmitting a third common signal, the frequency domain position of the third common signal is the same as the frequency domain position of the first common signal, and the time domain position of the first common signal does not overlap with the time domain position of the second common signal; the third common resource block is the same as the first common resource block, and the third common resource block is the common resource block where the start frequency domain position of the third common signal is located.

[0053] In a possible design, there is at least partial overlap between the time domain positions of the first common signal and the second common signal.

[0054] In a sixth aspect, the present application provides a communication device, which includes a transceiver unit and a processing unit: the transceiver unit is used for transmitting and receiving information; the processing unit is used for transmitting a first common signal through the transceiver unit, and there is an interval of Z frequency domain units between the starting frequency domain position of the first common signal and the starting frequency domain position of a second common signal, Z is an integer multiple of X, and X = max(1, 2 μ ),2 μ is the ratio of a first SCS to a second SCS, the first SCS is the SCS of a common resource block, the second SCS is the SCS of the first common signal, and the SCS of the first common signal is the same as the SCS of the second common signal. The frequency domain position of the first common signal is different from the frequency domain position of the second common signal, and Z is a positive integer.

[0055] In a possible design, the processing unit is used for transmitting the second common signal through the transceiver unit.

[0056] In a possible design, the Z frequency domain units are Z frequency domain units under the second SCS.

[0057] In a possible design, the first common signal carries a first offset, the second common signal carries the first offset, or the first offset is predefined; the first offset is the offset of the starting frequency domain position of the second common signal relative to the starting frequency domain position of a second common resource block, and the first offset is also the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of a first common resource block. The first common resource block is the common resource block where the starting frequency domain position of the first common signal is located, and the second common resource block is the common resource block where the starting frequency domain position of the second common signal is located.

[0058] In a possible design, at least part of the time domain positions of the first common signal and the second common signal overlap.

[0059] In a seventh aspect, the present application provides a communication device, which can be a first device, or a module or unit (such as a chip, or a chip system, or a circuit) corresponding one by one to the method / operation / step / action described in any one of the first aspect to the third aspect executed in the first device, or can be used in matching with the first device.

[0060] In an eighth aspect, the present application provides a communication device, including at least one processing element, wherein at least one storage element is used to store programs and data, and the at least one processing element is used to read and execute the programs and data stored in the storage element, so that the method described in any one of the above aspects of the present application is implemented.

[0061] In a possible design, the communication device further includes the at least one storage element.

[0062] In a ninth aspect, the present application further provides a computer program, which, when running on a computer, causes the computer to execute the method described in any one of the above aspects.

[0063] In a tenth aspect, the present application provides a communication device, which includes: an interface circuit and at least one processor; the interface circuit is used to provide input and / or output of programs or instructions for the at least one processor; the at least one processor is used to execute the programs or instructions so that the communication device can implement the method described in any one of the above aspects.

[0064] In a possible manner, the communication device includes the at least one memory, and the at least one memory is used to store the programs or instructions.

[0065] In an eleventh aspect, the present application provides a computer storage medium, in which a software program is stored, and when the software program is read and executed by one or more processors, the method described in any one of the above aspects can be implemented.

[0066] In a twelfth aspect, the present application provides a computer program product containing instructions, which, when running on a computer, causes the computer to execute the method described in any one of the above aspects.

[0067] In a thirteenth aspect, the present application provides a chip system, which includes at least one chip and a memory, and the at least one chip is used to read and execute the programs stored in the memory to implement the method described in any one of the above aspects.

[0068] In a fourteenth aspect, the present application provides a communication system, which includes at least one terminal and a base station, the terminal is used to execute the method described in any one of the first aspect, and the base station is used to execute the method described in any one of the second aspect.

[0069] Based on the implementations provided in the above aspects, the present application can be further combined to provide more implementations. Description of the Drawings

[0070] To more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings required to be used in the embodiments of the present application or the background art.

[0071] Figure 1 Shows a schematic diagram of the architecture of a communication system;

[0072] Figure 2 Shows a schematic diagram of the time-frequency resource structure of an SSB;

[0073] Figure 3 Shows a schematic diagram of a Kssb;

[0074] Figure 4 Shows a comparison schematic diagram of a U6G scenario and a Sub6G scenario;

[0075] Figure 5 Shows a schematic diagram of transmitting multiple SSBs in frequency division;

[0076] Figure 6 Shows a schematic diagram in which the CRBs corresponding to different SSBs are inconsistent in the scenario of transmitting multiple SSBs in frequency division;

[0077] Figure 7 Shows a possible flowchart of a communication method;

[0078] Figure 8 Shows a schematic diagram of the possible positions of the second common signal;

[0079] Figure 9 Shows a schematic diagram of the possible positions of the frequency points of the synchronization grid;

[0080] Figure 10 Shows a schematic diagram of the frequency-domain position relationship between the first common signal and the second common signal;

[0081] Figure 11 Shows one of the schematic diagrams of the correspondence between common resource blocks and common signals;

[0082] Figure 12 Shows another schematic diagram of the correspondence between common resource blocks and common signals;

[0083] Figure 13A Shows one of the schematic diagrams of the indexes of multiple common signals;

[0084] Figure 13B Shows another schematic diagram of the indexes of multiple common signals;

[0085] Figure 13C Shows a third schematic diagram of the indexes of multiple common signals;

[0086] Figure 13DThe fourth schematic diagram showing the indexes of multiple common signals;

[0087] Figure 13E The fifth schematic diagram showing the indexes of multiple common signals;

[0088] Figure 13F The sixth schematic diagram showing the indexes of multiple common signals;

[0089] Figure 13G The seventh schematic diagram showing the indexes of multiple common signals;

[0090] Figure 14 The third schematic diagram showing the correspondence between a common resource block and a common signal;

[0091] Figure 15 The schematic diagram showing the structure of a communication device;

[0092] Figure 16 The schematic diagram showing the structure of another communication device. Detailed implementation manners

[0093] The following describes the specific implementation manners of the present application by way of examples in combination with the accompanying drawings in the embodiments of the present application. However, the implementation manners of the present application may also include combining these embodiments without departing from the spirit or scope of the present application, such as adopting other embodiments and making structural changes. Therefore, the detailed description of the following embodiments should not be understood in a limiting sense. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, rather than to limit the present application.

[0094] Embodiments of the present application can be applied to various communication systems, such as: Global System for Mobile Communications (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, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WIMAX) communication system, 5G system or New Radio (NR), or applied to future communication systems or other similar communication systems, etc.

[0095] Figure 1 It is a schematic diagram of the architecture of the communication system 1000 to which the embodiments of the present application are applied. As Figure 1 shown, the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may further include the Internet 300. Among them, the radio access network 100 may include at least one radio access network device (such as Figure 1 110a and 110b in Figure 1 ), and may further include at least one terminal (such as Figure 1 120a - 120j in Figure 1 ). The terminal is connected to the radio access network device in a wireless manner, and the radio access network device is connected to the core network in a wireless or wired manner. The core network device and the radio access network device may be independent different physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated on the same physical device, or the functions of part of the core network device and part of the radio access network device may be integrated on a physical device. Terminals can be connected to each other and radio access network devices can be connected to each other in a wired or wireless manner.

[0096] A radio access network device can be simply referred to as a network device, which can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it can also be a module or unit that completes some functions of the base station. For example, it can be a central unit (CU) or a distributed unit (DU). 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 some 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 the 3rd generation partnership project (3GPP). The radio access network device 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

[0097] 110b in ), or a relay node or a donor node, etc. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the radio access network device. For ease of description, the base station is used as an example of the radio access network device in the following description.A terminal device can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used 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, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the terminal device. For ease of description, the terminal will be used as an example of the terminal device in the following description.

[0098] The base station and the terminal can be fixed in position or movable. The base station and the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites. The embodiments of the present application do not limit the application scenarios of the base station and the terminal.

[0099] The roles of the base station and the terminal can be relative. For example, Figure 1 the helicopter or drone 120i in [description] can be configured as a mobile base station. For the terminals 120j that access the radio access network 100 through 120i, the drone 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 1 The 110a and 110b in [description] can be referred to as communication devices with base station functions. Figure 1 The 120a - 120j in [description] can be referred to as communication devices with terminal functions.

[0100] Communication can be carried out between a base station and a terminal, between base stations, or between terminals through licensed spectrum, unlicensed spectrum, or 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. Embodiments of this application do not limit the spectrum resources used for wireless communication.

[0101] In embodiments of this application, the functions of a base station can also be performed by a module (such as a chip) in the base station or by a control subsystem that includes base station functions. The control subsystem that includes base station functions here can be a control center in application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. The functions of a terminal can also be performed by a module (such as a chip or a modem) in the terminal or by a device that includes terminal functions.

[0102] It can be understood that in embodiments of this application, the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), physical uplink control channel (PUCCH), and physical uplink shared channel (PUSCH) are only examples of a downlink data channel, a downlink control channel, an uplink control channel, and an uplink data channel respectively. In different systems and different scenarios, data channels and control channels may have different names, and embodiments of this application do not limit this.

[0103] Hereinafter, some terms in embodiments of this application are explained to facilitate understanding by those skilled in the art.

[0104] 1. Subcarrier (SC): In an orthogonal frequency division multiplexing (OFDM) system, the frequency domain resources are divided into several sub-resources, and each sub-resource in the frequency domain can be called a subcarrier. A subcarrier can also be understood as the smallest granularity of frequency domain resources in the current communication system.

[0105] 2. Sub-carrier space (SCS): In an OFDM system, it is the interval value between the center positions or peak positions of two adjacent sub-carriers in the frequency domain. For example, the sub-carrier space in the LTE system is 15 kHz. In 5G, the sub-carrier space in the NR system can be 15 kHz, or 30 kHz, or 60 kHz, or 120 kHz, etc. Among them, the sub-carrier space is inversely proportional to the OFDM symbol length. The larger the sub-carrier space, the smaller the corresponding OFDM symbol length.

[0106] 3. Resource block (RB): An RB can include multiple sub-carriers in the frequency domain. For example, an RB in the LTE system includes 12 sub-carriers, and an RB in the 5G NR system also includes 12 sub-carriers. With the evolution of the communication system, the number of sub-carriers included in an RB can also be other values. The sub-carriers included in an RB can be continuous or discontinuous.

[0107] 4. Resource element (RE): The smallest resource unit in NR, which occupies 1 OFDM symbol in the time domain and 1 sub-carrier in the frequency domain.

[0108] 5. Common resource block (CRB)

[0109] Since 5G will use a larger channel bandwidth compared to LTE and introduce the concept of bandwidth part (BWP), in order to achieve the configuration and management of BWP, CRB is numbered starting from a reference point within the system bandwidth. This reference point is called reference point (Point) A. Point A points to the center position of sub-carrier 0 of CRB0. CRB can be understood as the frequency domain resource unit corresponding to the control information for scheduling system information, or the frequency domain resource unit corresponding to system information. Exemplarily, subsequent system information block 1 (SIB1), the control resource set 0 (CORESET0) / common search space 0 (CSS0) corresponding to the physical downlink control channel (PDCCH) for scheduling SIB1 can all be configured based on CRB.

[0110] Different resources may use different subcarrier spacings. For example, SSB, PUSCH, etc. may have various different SCSs, and the CRB can be regarded as a ruler. Using the CRB, the positions of these resources can be located. For example, if PUSCH occupies a bandwidth of 10M to 50M, this bandwidth can be represented by the CRB, that is, PUSCH occupies CRB10 to CRB20.

[0111] 6. Common signals

[0112] It can be called common information or non-dedicated information, or understood as information sent by a communication device to multiple communication devices. Taking downlink communication as an example, common information can be understood as information sent by the base station to multiple terminals or a group of terminals in the cell, or understood as information that the base station does not specifically send to a certain terminal or a group of terminals in the cell, or understood as information that can be used by multiple terminals or a group of terminals in the cell. Common signals can be used for terminals to identify the cell, initial access to the cell, neighbor cell measurement, or cell handover and other processes. For example, the common information can be one or more of SSB, PSS, SSS, PBCH.

[0113] 7. Frequency division multiplexing

[0114] It can be simply called the frequency division method or frequency division. The frequency division multiplexing in this application is specifically that the time domain positions overlap, and the frequency domain positions do not overlap. For example, for frequency division SSB, specifically, different SSBs may have the same time domain position and non-overlapping frequency domain positions, or may have partially overlapping time domain positions and non-overlapping frequency domain positions, or may have an inclusion and being-included relationship in the time domain positions and non-overlapping frequency domain positions.

[0115] 8. SSB:

[0116] In the current communication network, terminals mainly perform cell search based on searching for SSB. SSB includes two parts, namely the synchronization signal (SS) and the physical broadcast channel (PBCH). And SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). Therefore, it can also be considered that SSB includes three parts. Among them, the combination of SS and PBCH can be used to obtain the cell ID, downlink timing (for example, finding the reference point for downlink transmission, such as the frame boundary), and obtaining necessary system messages (for example, obtaining the time-frequency resource position of the PDCCH corresponding to SIB1, etc.).

[0117] Before detecting the SSB, the terminal does not know the specific time-frequency resource location of the SSB. That is to say, the terminal needs to blindly detect the location of the SSB. However, since the cell bandwidth in NR is very wide, if the terminal tries to detect the SSB at each frequency point, it will lead to a very slow access speed of the terminal. Therefore, the synchronization raster is specifically defined in the NR protocol, which has different sizes in different frequency bands, namely 1200 kHz, 1.44 MHz, and 17.28 MHz. That is to say, the terminal can try to detect the SSB one by one at intervals of the synchronization raster, thereby improving the speed of the terminal detecting the SSB. Exemplarily, the center frequency of the SSB can be the same as the frequency point of the synchronization raster. In the initial access, the terminal will assume that the period of the base station sending the SSB is 20 ms. That is to say, if on a synchronization raster, the terminal does not detect the SSB within 20 ms at the frequency point of the synchronization raster, the terminal may continue to detect on other synchronization rasters.

[0118] The time-frequency resource structure of the SSB is as Figure 2 shown. The SSB contains 4 symbols that are continuous in the time domain and occupies 20 RBs in the frequency domain, that is, 240 subcarriers (SCs).

[0119] Frequency domain position of the SSB: The position of the SSB in the frequency domain is defined by the synchronization raster, as described above.

[0120] Time domain position of the SSB: The time domain position of the SSB is defined by the SSB pattern. An SSB pattern specifies the time domain position of a set of continuous SSBs in a half-frame. Currently, 3GPP has defined 5 SSB patterns for the unshared spectrum. However, generally only 1 - 2 SSB patterns are available for each band, and different SSB patterns have a one-to-one mapping relationship with the SCS and the band.

[0121] The SSB includes the master information block (MIB). Among them, the MIB is determined by the high-layer signaling. Since the update period of the high-layer signaling is relatively long, the content in the MIB bits remains unchanged within a determined and preset duration. Correspondingly, the terminal can receive multiple MIBs within the preset duration and perform combined reception to improve the reception success rate. For example, if the SSB transmission period is 20 ms and the preset duration is 80 ms, then there are 4 SSBs within each 80 ms, and 4 MIBs can be combined for reception.

[0122] In addition, NR gives flexibility to the SSB configuration. In NR, the SCS corresponding to the SSB can be configured independently, and the SCS corresponding to the SSB can be different from the SCS corresponding to the CRB. Therefore, NR introduces the indication information Kssb in the MIB.

[0123] Specifically, the specific content indicated by Kssb is the subcarrier-level offset from the subcarrier 0 of the CRB corresponding to subcarrier 0 in the SSB to subcarrier 0 in the SSB. Kssb is indicated in units of the SCS of the SSB. Specifically, subcarrier 0 in the SSB is the first subcarrier corresponding to the SSB, or in other words, the subcarrier with the lowest frequency-domain position in the SSB. The CRB is the CRB corresponding to subcarrier 0 in the SSB, or it can be understood that the absolute frequency-domain position of subcarrier 0 (i.e., the first subcarrier) in the SSB falls within the CRB.

[0124] For example Figure 3 is a possible example where the SCS of the CRB is 30 kHz and the SCS of the SSB is 15 kHz. The starting frequency-domain position of the SSB (subcarrier 0 in the SSB) is S subcarriers away from the starting frequency-domain position of the CRB (subcarrier 0 in the CRB corresponding to this SSB), and S subcarriers are in units of the SCS of the SSB. Therefore, the indicated value of Kssb in the MIB is S, where S is an integer. That is to say, Kssb indicates the subcarrier offset from subcarrier 0 of the CRB corresponding to the SSB to subcarrier 0 in this SSB in units of the SCS of the SSB.

[0125] Currently, the NR protocol includes various configuration combinations of the SCS of the CRB and the SCS of the SSB. Taking FR1 as an example, the possible combinations of the SCS of the CRB and the SCS of the SSB include: {30, 30} KHz, {30, 15} KHz, {15, 30} KHz, {15, 15} KHz. Regardless of which combination is actually used in the system configuration, Kssb is indicated in units of the SCS of the SSB.

[0126] U6G can be understood as the frequency band above 6 GHz, such as 6.425 to 7.125 GHz. Below 6G (Sub6G) can be the 2.6 GHz, 3.5 GHz frequency bands, or the 4.9 GHz frequency band, etc. For example Figure 4As shown, the typical bandwidth of the current wireless network is 100 MHz, the subcarrier spacing is 30 KHz, and the maximum number of RBs that can be scheduled per unit time is 273. In the U6G scenario, a possible typical bandwidth is 400 MHz, the subcarrier spacing is 60 KHz, and the maximum number of resource blocks (RBs) that can be scheduled per unit time is more than 550. Therefore, the future network using the U6G band has strong transmission performance and more flexible scheduling and access capabilities. At the same time, although using the U6G band can bring the above benefits, from the characteristics of wireless transmission, a higher transmission frequency also means greater channel fading at the same transmission distance. Therefore, the coverage performance of various signals in the U6G scenario is somewhat degraded compared to the existing network using the Sub6G band.

[0127] To solve the problem of the degraded coverage performance of SSB transmission, a possible design is to send multiple SSBs at the same time unit and at different frequency domain positions, such as Figure 5 is a possible example. By transmitting multiple SSBs through frequency division, the beam directions of each SSB can be different, and it is possible to use beams with a finer beam width and a greater beamforming gain to transmit each SSB, thereby improving the reception success rate of the SSB at the terminal side and further improving the coverage performance. In this way, the terminal may detect the cell and access it based on any one of the multiple SSBs transmitted through frequency division.

[0128] Such as Figure 6 As shown, when transmitting multiple SSBs through frequency division, the CRBs corresponding to different SSBs are inconsistent. SSB0 corresponds to CRB0, and SSB1 corresponds to CRB1. Then the Kssb values corresponding to SSB0 are different from the Kssb values corresponding to SSB. Therefore, SSB0 and SSB1 need to carry different MIBs, which may cause the terminal side to be unable to combine and receive the received MIBs, reducing the transmission performance.

[0129] Based on the above network system architecture and the content of the above related technical introduction, several possible communication methods are provided in the embodiments of the present application to improve the coverage performance and reception performance of public signals. The execution subjects of each communication method are introduced by taking the base station and the terminal as examples. For example, the base station can be the access network device 110a or the access network device 110b in the foregoing Figure 1 . The terminal can be any one of the terminals 120 shown in the foregoing Figure 1 . In addition, it should be understood that the base station can also be replaced by a communication device with base station functions or a chip, unit, or module inside a communication device with base station functions. The terminal can also be replaced by a communication device with terminal functions or a chip, unit, or module inside a communication device with terminal functions.

[0130] Figure 7 Exemplarily, a possible flowchart of a communication method provided by an embodiment of the present application is shown. As Figure 7 shown, the method includes:

[0131] Step 700: The base station sends a first common signal. Correspondingly, the terminal receives the first common signal.

[0132] Specifically, the base station may send a first common signal, or the base station sends multiple common signals including the first common signal. The terminal device may detect (or receive) one or more of the multiple common signals. When the terminal detects one common signal, the first common signal is also the one common signal actually detected by the terminal. When the terminal detects multiple common signals, the first common signal may be the one common signal with the optimal beam quality among the multiple common signals.

[0133] Step 720: The terminal determines the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal and the first configuration.

[0134] Wherein, the first configuration indicates the frequency-domain position of the second common signal. The frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal. The first common resource block is the common resource block where the starting frequency-domain position of the first common signal is located.

[0135] It should be noted that the base station may or may not send the second common signal. The present application focuses on the first common signal, and the present application does not limit whether the terminal receives other common signals or whether the base station sends other common signals.

[0136] Exemplarily, the frequency-domain position of the first common signal is different from the frequency-domain position of the second common signal, that is, the frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal. It can also be understood that the frequency-domain units included in the frequency-domain resource of the first common signal are different from the frequency-domain units included in the frequency-domain resource of the second common signal, or there are no identical frequency-domain units between the frequency-domain units included in the frequency-domain resource of the first common signal and the frequency-domain units included in the frequency-domain resource of the second common signal. For example, the frequency-domain unit may be a subcarrier or an RB, etc., and the present application does not limit this.

[0137] Exemplarily, at least part of the time-domain position of the first common signal overlaps with the time-domain position of the second common signal. It can also be understood that at least part of the time-domain units of the time-domain resource of the first common signal are the same as the time-domain units of the time-domain resource of the second common signal. For example, the time-domain unit may be a symbol, and the present application does not limit this.

[0138] Combined with the fact that the frequency-domain positions of the first common signal and the second common signal do not overlap, this example can also be understood as that the first common signal and the second common signal are frequency-division multiplexed. Or rather, the base station sends common signals in a frequency-division manner. It should be noted that the base station sending common signals in a frequency-division manner in this application refers to the relationship between the resources configured for multiple common signals, and does not limit whether the base station actually sends one common signal or multiple common signals.

[0139] Exemplarily, the base station sends common signals in a frequency-division manner. Among them, if the base station sends multiple common signals, at least part of the time-domain positions corresponding to the multiple common signals overlap, and the frequency-domain positions corresponding to the multiple common signals do not overlap. Taking the multiple common signals including a first common signal and a second common signal as an example, the time-domain position of the first common signal is the same as the time-domain position of the second common signal, and the frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal. Or, the time-domain position of the first common signal and the time-domain position of the second common signal partially overlap, and the frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal. Or, the time-domain position of the first common signal includes the time-domain position of the second common signal (or the time-domain position of the second common signal includes the time-domain position of the first common signal), and the frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal.

[0140] For example, as Figure 6 shown, the time-domain position of the first common signal is the same as the time-domain position of the second common signal, and the frequency-domain position of the first common signal does not overlap with the frequency-domain position of the second common signal. That is to say, the base station sends the first common signal and the second common signal at different frequency-domain positions at the same moment, or rather, the base station frequency-division sends the first common signal and the second common signal.

[0141] In a possible implementation manner, the first configuration indicates the frequency-domain positions of multiple common signals, and the frequency-domain positions of the multiple common signals include the frequency-domain position of the first common signal and the frequency-domain position of the second common signal. The frequency-domain positions of the multiple common signals can be understood as the frequency-domain positions of different common signals. For example, the frequency-domain positions of SSBs with different indexes. Among them, the first configuration can also be referred to as the pattern of the common signal. The first configuration can be predefined by the protocol or notified to the terminal through signaling.

[0142] When the first configuration is predefined, since the frequency-domain positions of the multiple common signals satisfy the relationship indicated by the first configuration, the base station sending the first common signal in this application can also be understood as the base station sending the first common signal according to the first configuration.

[0143] When the first configuration is indicated by the base station through signaling, in this application, the base station sends the first common signal, which can also be understood as the base station sending the first common signal according to the first configuration. The base station also sends information capable of indicating the frequency-domain positions of multiple common signals, that is, the base station also sends signaling including the first configuration.

[0144] When the first configuration is carried in the first common signal, that is, the terminal device obtains the first configuration by receiving the first common signal. The base station sends the first common signal, and the first common signal indicates the first configuration.

[0145] Exemplarily, the multiple common signals can be common signals of the same type. For example, the first common signal and the second common signal are common signals of the same type. For example, the first common signal and the second common signal are two different SSBs.

[0146] Exemplarily, the SCSs corresponding to the multiple common signals are the same. For example, the SCSs of the first common signal and the second common signal are the same.

[0147] Since the terminal needs to determine the starting frequency-domain position of the first common resource according to the first configuration, and the first configuration indicates the frequency-domain position of the second common signal, therefore, the second common signal can also be referred to as a reference common signal or a calibration common signal. Exemplarily, the second common signal can be the common signal with the lowest frequency-domain position among the multiple common signals, or the common signal with the highest frequency-domain position among the multiple common signals, or the common signal in the middle frequency-domain position among the multiple common signals, or any one of the multiple common signals, etc. This application does not make a limitation on this. For example, the patterns of the multiple common signals can be as shown in Figure 8 a, b, c in Figure 8 In (a) of Figure 8 the number of the multiple common signals is 3, and the second common signal is the common signal with the lowest frequency-domain position among the 3 common signals. In Figure 8 in (b), the number of the multiple common signals is 3, and the second common signal is the common signal with the highest frequency-domain position among the 3 common signals. In

[0148] In a possible implementation, the terminal can detect common signals at intervals of synchronization grids. The center frequencies of some or all of the multiple common signals are located in the same synchronization grid. Or rather, the center frequencies of some or all of the multiple common signals are at the same frequency positions as those of a synchronization grid. It can also be understood that the multiple common signals correspond to or are associated with the same synchronization grid. It can also be understood that the terminal can search for one or more common signals in a synchronization grid. Therefore, different from NR where the terminal can only search for one common signal in a synchronization grid and the center frequency of this common signal is the same as the frequency of the synchronization grid, in this application, the terminal can search for one or more common signals in a synchronization grid. The frequencies of the synchronization grids in this application can adopt but are not limited to the following design methods:

[0149] Exemplarily, the frequency of the synchronization grid is the center frequency of the patterns of multiple common signals. Herein, the frequency of the synchronization grid being the center frequency of the patterns of multiple common signals can also be understood as the distribution of the multiple common signals being centered around the frequency of the synchronization grid. For example, in Figure 9 (a) therein, the frequency of the synchronization grid is the center frequency of the patterns of multiple common signals.

[0150] Or, the frequency of the synchronization grid is the center frequency of the common signal with the lowest frequency domain position among the multiple common signals. For example, in Figure 9 (b) therein, the frequency of the synchronization grid is the center frequency of the common signal with the lowest frequency domain position among the multiple common signals.

[0151] Or, the frequency of the synchronization grid is the center frequency of the common signal with the highest frequency domain position among the multiple common signals. For example, in Figure 9 (c) therein, the frequency of the synchronization grid is the center frequency of the common signal with the highest frequency domain position among the multiple common signals.

[0152] Or, the frequency of the synchronization grid is the center frequency, the start position of the frequency domain, or the end position of the frequency domain of the second common signal. For example, in Figure 9 (d) therein, the frequency of the synchronization grid is the center frequency of the second common signal.

[0153] Or, the frequency band of the synchronization grid is the center frequency of the common signal in the middle frequency domain position among the multiple common signals. For example, in Figure 9 (e) therein, the number of common signals is 5, and the frequency of the synchronization grid is the center frequency of the 3rd common signal.

[0154] Combined with the above step 700, the base station may send some or all of the multiple common signals according to the first configuration. These common signals correspond to the same synchronization grid. Furthermore, the terminal may detect the common signals within the synchronization grid according to the frequency point of the synchronization grid. Hereinafter, only the example of the terminal detecting the first common signal among these common signals will be used for illustration.

[0155] The following is an example illustration of the specific manner in which the terminal determines the starting frequency domain position of the first common resource block according to the frequency domain position of the first common signal and the first configuration.

[0156] Method 1: The terminal may determine a third offset according to a second offset. The second offset indicates the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the second common signal. The third offset is the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the first common resource block. Further, the terminal may determine the starting frequency domain position of the first common resource block according to the third offset and the starting frequency domain position of the first common signal.

[0157] As a possible implementation manner, the terminal may determine the second offset according to the frequency domain position of the first common signal and the first configuration. The terminal may determine the second offset according to the frequency domain position of the first common signal and the frequency domain position of the second common signal indicated by the first configuration. In addition, the second offset may also be referred to as the frequency domain position interval between the first common signal and the second common signal. How the terminal determines the second offset may refer to the relevant description in the following Figures 13A to 13G related description.

[0158] Figure 10 The figure shows a schematic diagram of the frequency domain position relationship between the first common signal and the second common signal. Among them, in Figure 10 (a) of, since the frequency domain position of the first common signal is higher than the frequency domain position of the second common signal, therefore, the second offset is greater than 0. In Figure 10 (b) of, since the frequency domain position of the second common signal is higher than the frequency domain position of the first common signal, therefore, the second offset is less than 0. That is to say, the second offset may be greater than 0, or less than 0, or equal to 0. In addition, the role of the second offset is to indicate the offset between the first common signal and the second common signal in the frequency domain. The second offset may also be expressed in other ways. For example, the second offset indicates the offset of the ending frequency domain position of the first common signal relative to the ending frequency domain position of the second common signal.

[0159] In a possible implementation, the second offset and the third offset satisfy Formula 1, and Formula 1 is: the third offset = the second offset value mod (C * X). In this case, it can also be understood that the frequency-domain starting position of the second common signal is the same as, or aligned with, the frequency-domain starting position of the second common resource block.

[0160] Where X = max(1, 2 μ ) and 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant. For example, when the SCS of the first common resource block is 60 kHz and the SCS of the first common signal is 15 kHz, 2 μ = 60 / 15 = 4; when the SCS of the first common resource block is 60 kHz and the SCS of the first common signal is 30 kHz, 2 μ = 60 / 30 = 2.

[0161] Where, if the third offset is M, M represents M subcarriers at the subcarrier spacing of the first common signal, and M is a non-negative integer. Or it can be understood that the third offset is determined with the subcarrier spacing of the first common signal as the granularity.

[0162] In another possible implementation, the second offset and the third offset satisfy Formula 2, and Formula 2 is: the third offset = the second offset value mod (C * Y). In this case, it can also be understood that the frequency-domain starting position of the second common signal is the same as, or aligned with, the frequency-domain starting position of the second common resource block. Where Y = max(1, 2 k ) and 2 k is the ratio of the subcarrier spacing of the first common signal to the subcarrier spacing of the first common resource block, and C is a constant. For example, when the SCS of the first common resource block is 60 kHz and the SCS of the first common signal is 15 kHz, 2 k = 15 / 60 = 1 / 4; when the SCS of the first common resource block is 60 kHz and the SCS of the first common signal is 30 kHz, 2 k = 30 / 60 = 1 / 2. Where, if the third offset is N, N represents N subcarriers at the subcarrier spacing of the first common resource block, and N is a non-negative integer. Or it can be understood that the third offset is determined with the subcarrier spacing of the first common resource block as the granularity.

[0163] Exemplarily, for the above formulas 1 and 2, C may represent the number of subcarriers included in a RE. For example, the value of C may be 12. Among them, the first common signal may indicate the subcarrier spacing of the first common resource block. For example, if the first common signal is an SSB and the first common resource block is a CRB, the first common signal may carry an MIB, and the MIB may include a field for indicating the subcarrier spacing of the CRB. The terminal detects the first common signal and can then determine the subcarrier spacing of the first common signal. Among them, for the above formula 1, X = max(1, 2 μ ) can also be expressed in other forms. For example, X = max(1, R1), where R1 is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal. For the above formula 2, Y = max(1, 2 k ) can also be expressed in other forms. For example, Y = max(1, R2), where R2 is the ratio of the subcarrier spacing of the first common signal to the subcarrier spacing of the first common resource block.

[0164] For the above method 1, the terminal can determine a third offset according to one or more of the second offset, the subcarrier spacing of the first common resource block, and the subcarrier spacing of the first common signal. Therefore, the terminal determines the first common resource block corresponding to the received first common signal, and the specific content carried by the common signal sent by the base station may be the same. For example, in the scenario of transmitting multiple SSBs in frequency division, the terminal can determine the CRB corresponding to the received SSB, and multiple SSBs can carry the MIB with the same content, so that the terminal device can perform combined reception on the MIBs with different frequency-domain positions in multiple transmission periods, improving the coverage performance / reception performance of the MIB (SSB).

[0165] Method 2: The terminal can determine the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and the first offset, where the first offset is the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of the second common resource block, and the second common resource block is the common resource block where the starting frequency-domain position of the second common signal is located.

[0166] Exemplarily, the first common signal carries the first offset, or the first offset is predefined. Or the first offset may also be included in the first configuration, and this application does not make any limitations in this regard. For example, the first common signal is an SSB, the SSB carries an MIB, and the MIB includes Kssb, and Kssb is the first offset.

[0167] As a possible implementation, the terminal may determine a third offset based on a first offset and a second offset. The second offset indicates the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the second common signal. The third offset is the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the first common resource block. Further, the terminal may determine the starting frequency domain position of the first common resource block based on the third offset and the starting frequency domain position of the first common signal. Among them, the terminal may determine the second offset according to the frequency domain position of the first common signal and the first configuration. Exemplarily, the terminal may determine the second offset according to the frequency domain position of the first common signal and the frequency domain position of the second common signal. Among them, how the terminal determines the second offset may refer to the relevant description in the following Figures 13A to 13G related description.

[0168] In a possible implementation, the first offset to the third offset satisfy Equation 3, and Equation 3 is: the third offset = (the first offset value + the second offset value) mod (C * X). Where X = max(1, 2 μ ) and 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant. Where if the third offset is M, M represents M subcarriers at the subcarrier spacing of the first common signal, and M is a non-negative integer. Or it can be understood that the third offset is determined in units of the subcarrier spacing of the first common signal.

[0169] In another possible implementation, the first offset to the third offset satisfy Equation 3, and Equation 3 is: the third offset = (the first offset value + the second offset value) mod (C * Y). Where Y = max(1, 2 k ) and 2 k is the ratio of the subcarrier spacing of the first common signal to the subcarrier spacing of the first common resource block, and C is a constant. Where if the third offset is N, N represents N subcarriers at the subcarrier spacing of the first common resource block, and N is a non-negative integer. Or it can be understood that the third offset is determined in units of the subcarrier spacing of the first common resource block.

[0170] Exemplarily, the description of each parameter in the above Equation 3 and Equation 4 may refer to the relevant description in the above Equation 1 and Equation 2, and will not be elaborated here.

[0171] For the above-mentioned Method 2, the terminal can determine a third offset based on one or more of the first offset, the second offset, the subcarrier spacing of the first common resource block, or the subcarrier spacing of the first common signal. Therefore, in the scenario of transmitting multiple common signals in frequency division, different terminals can determine the common resource blocks corresponding to the received common signals based on the same first offset. Thus, the specific content carried by multiple common signals can be the same. For example, in the scenario of transmitting multiple SSBs in frequency division, different terminals can determine the CRBs corresponding to the received SSBs based on the same first offset. Therefore, multiple SSBs can carry the same MIB, enabling the terminal device to perform combined reception on the MIBs with different frequency-domain positions in multiple transmission periods, improving the coverage performance / reception performance of the MIB (SSB).

[0172] It can be understood that the above Formulas 1 to 4 can also be represented in other ways, such as in a table, etc. This application does not limit this. It should be noted that Method 1 can also be understood as the case where the first offset in Method 2 is 0.

[0173] In this application, unless otherwise specified, the subcarrier spacings of multiple common signals are the same. That is, the subcarrier spacing of the first common signal is the same as that of the second common signal. The subcarrier spacing of the first common signal or the second common signal can be simply referred to as the subcarrier spacing of the common signal. The subcarrier spacing of the first common resource block is also the same as that of the second common resource block. The subcarrier spacing of the first common resource block or the second common resource block can be simply referred to as the subcarrier spacing of the common resource block.

[0174] The following further illustrates the above with two specific examples:

[0175] Example 1, in Figure 11 in (a) and Figure 12 in (a), the SCS of the common resource block is 60 KHz, the SCS of the common signal is 15 KHz, and X = 2 μ = 4. The second offset is 22 RBs. 22 RBs refer to 22 RBs at the SCS of 15 KHz of the common signal, that is, 22 * 12 = 264 subcarriers.

[0176] As Figure 11 in (a), if there is no first offset, that is, corresponding to Method 1, substituting the above parameters into Formula 1 gives:

[0177] The third offset value = 264 mod (12 * 4) = 24.

[0178] As Figure 12 in (a), if there is a first offset and the first offset = S, that is, corresponding to Method 2, substituting the above parameters into Formula 3 gives:

[0179] The third offset value = (S + 264) mod (12 * 4) = (S + 24) mod 48 = S - 24.

[0180] Example 2, in (b) in Figure 11 and (b) in Figure 12 the SCS of the common resource block is 30 KHz, the SCS of the common signal is 15 KHz, and X = 2 μ = 2. The second offset is 21 RBs. 21 RBs means 22 RBs at the SCS of 15 KHz of the common signal, that is, 21 * 12 = 252 subcarriers.

[0181] As in Figure 11 (b), if there is no first offset, that is, corresponding to Method 1, substituting the above parameters into Formula 1 gives:

[0182] The third offset value = 252 mod (12 * 2) = 12.

[0183] As in Figure 12 (b), if there is a first offset, the first offset = S, that is, corresponding to Method 2, substituting the above parameters into Formula 3 gives:

[0184] The third offset value = (S + 252) mod (12 * 2) = (S + 12) mod 24 = S - 12.

[0185] In a possible implementation manner, the multiple common signals indicated by the first configuration have independent indexes. Among them, the index of the common signal can also be referred to as the frequency-domain index or number or identifier of the common signal, etc. Taking the index as an example, several determination methods of the common signal index are given through Method a to Method d. The terminal can determine the second offset according to the index of the first common signal and the index of the second common signal. The following specifically describes how the terminal determines the second offset in combination with the possible methods a to d adopted by the indexes of the multiple common signals.

[0186] Method a: The frequency-domain resources of any two common signals among the multiple common signals do not have the same frequency-domain unit, that is, the frequency-domain positions of any two common signals among the multiple common signals do not overlap. The indexes corresponding to the multiple common signals are determined according to the order of the frequency-domain positions corresponding to the multiple common signals from low to high.

[0187] In a possible implementation manner, any two common signals with adjacent indexes are separated by M frequency-domain units, where M is a positive integer. That is, the number of frequency-domain units separating any two common signals with adjacent frequency-domain positions among the multiple common signals is the same. The second offset is the product of the difference between the index of the first common signal and the index of the second common signal and M.

[0188] Figure 13A The indexes corresponding to the five public signals shown are determined in the order from low to high according to the frequency domain positions corresponding to the five public signals. Among them, i is an integer, and the frequency domain interval between any two adjacent public signals is M frequency domain units. The frequency domain position of the second public signal is only for illustration and is not a limitation of this application. Among them, assuming that the index of the second public signal is i, if the index of the public signal received by the terminal is i + 2, the second offset is (i + 2 - i) * M = 2M; if the index of the public signal received by the terminal is i + 1, the second offset is (i + 1 - i) * M = M; if the index of the public signal received by the terminal is i - 1, the second offset is (i - 1 - i) * M = -M; if the index of the public signal received by the terminal is i - 2, the second offset is (i - 2 - i) * M = -2M.

[0189] In a possible implementation, the second public signal and the adjacent public signal are separated by K1 frequency domain units, and any two adjacent public signals other than the second public signal are separated by K2 frequency domain units. K1 and K2 are positive integers, that is, the number of frequency domain units separating any two adjacent public signals among multiple public signals is not completely the same.

[0190] Exemplarily, the number of frequency domain units included in the second public signal can be greater than the number of frequency domain units included in other public signals. For example, the second public signal may include PBCH, PSS, and SSS, while other public signals may include PBCH.

[0191] If the index of the first public signal is greater than the index of the second public signal, the second offset = K1 + (the index of the first public signal - the index of the second public signal - 1) * K2; if the index of the first public signal is less than the index of the second public signal, the second offset = (the index of the first public signal - the index of the second public signal) * K2.

[0192] Figure 13BThe indexes corresponding to the five public signals shown are determined in the order from low to high according to the frequency domain positions corresponding to the five public signals. Among them, i is an integer. The second public signal and the adjacent public signal are separated by K1 frequency domain units. Any two adjacent public signals except the second public signal are separated by K2 frequency domain units. The frequency domain position of the second public signal is only an example and is not a limitation of this application. Among them, assuming that the index of the second public signal is i, if the index of the public signal received by the terminal is i + 2, the second offset is K1+(i + 2 - i - 1)*K2 = K1 + K2; if the index of the public signal received by the terminal is i + 1, the second offset is K1+(i + 1 - i - 1)*K2 = K1; if the index of the public signal received by the terminal is i - 1, the second offset is (i - 1 - i)*K2 = -K2; if the index of the public signal received by the terminal is i - 2, the second offset is (i - 2 - i)*K2 = -2K2.

[0193] Mode b: The frequency domain resources of any two public signals among multiple public signals do not have the same frequency domain unit, that is, the frequency domain positions of any two public signals among multiple public signals do not overlap. The indexes corresponding to the multiple public signals are determined in the order from high to low according to the frequency domain positions corresponding to the multiple public signals.

[0194] In a possible implementation, any two adjacent public signals are separated by M frequency domain units, where M is a positive integer. That is, the number of frequency domain units between any two adjacent public signals in the frequency domain is the same. The second offset is the product of the difference between the index of the second public signal and the index of the first public signal and M.

[0195] Figure 13C The indexes corresponding to the five public signals shown are determined in the order from high to low according to the frequency domain positions corresponding to the five public signals. Among them, i is an integer. Any two adjacent public signals in the frequency domain are separated by M frequency domain units. The frequency domain position of the second public signal is only an example and is not a limitation of this application. Among them, assuming that the index of the second public signal is i, if the index of the public signal received by the terminal is i - 2, the second offset is [i-(i - 2)]*M = 2M; if the index of the public signal received by the terminal is i - 1, the second offset is [i-(i - 1)]*M = M; if the index of the public signal received by the terminal is i + 1, the second offset is [i-(i + 1)]*M = -M; if the index of the public signal received by the terminal is i + 2, the second offset is [i-(i + 2)]*M = -2M.

[0196] In another possible implementation, the second common signal is separated from the common signal adjacent to the index by K1 frequency domain units, and any two common signals adjacent to the index except the second common signal are separated by K2 frequency domain units. K1 and K2 are positive integers, that is, the number of frequency domain units separating any two adjacent common signals among multiple common signals is not exactly the same.

[0197] If the index of the first common signal is greater than the index of the second common signal, the second offset = K1 + (the index of the second common signal - the index of the first common signal - 1) * K2; if the index of the first common signal is less than the index of the second common signal, the second offset = (the index of the second common signal - the index of the first common signal) * K2.

[0198] Figure 13D The indexes corresponding to the 5 shown common signals are determined according to the order from high to low of the frequency domain positions corresponding to the 5 common signals. Among them, i is an integer. The second common signal is separated from the common signal adjacent to the index by K1 frequency domain units, and any two common signals adjacent to the index except the second common signal are separated by K2 frequency domain units. The frequency domain position of the second common signal is only for example and is not a limitation of this application. Among them, assuming the index of the second common signal is i, if the index of the common signal received by the terminal is i - 2, then the second offset is K1 + [i - (i - 2) - 1] * K2 = K1 + K2; if the index of the common signal received by the terminal is i - 1, then the second offset is K1 + [i - (i - 1) - 1] * K2 = K1; if the index of the common signal received by the terminal is i + 1, then the second offset is [i - (i + 1)] * K2 = -K2; if the index of the common signal received by the terminal is i + 2, then the second offset is [i - (i + 2)] * K2 = -2K2.

[0199] Mode c: There are common signals with the same frequency domain position among multiple common signals. The multiple common signals are indexed in the order of first the time domain position from front to back and then the frequency domain position from low to high.

[0200] Figure 13E The indexes of the shown multiple common signals are determined in the order of first the time domain position from front to back and then the frequency domain position from low to high.

[0201] For the above mode c, in a possible implementation, the terminal can determine a first frequency domain indication value according to the index of the first common signal, determine a second frequency domain indication value according to the index of the second common signal, and further determine the second offset according to the difference between the two frequency domain indication values.

[0202] Exemplarily, represents rounding down.

[0203] Exemplarily, for any two common signals with adjacent frequency-domain positions among at least one common signal at the same transmission moment, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M. The second offset is the product of M and the difference between the first frequency-domain indication value and the second frequency-domain indication value.

[0204] As Figure 13E shown in a of assuming the index of the second common signal is 0, the index of the first common signal is 2, among three common signals at the same transmission moment, for any two common signals with adjacent frequency-domain positions, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M, then the second offset is (1 - 0) * M = M. Assuming the index of the second common signal is 0, the index of the first common signal is 3, among three common signals at the same transmission moment, for any two common signals with adjacent frequency-domain positions, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M, then the second offset is (1 - 0) * M = M.

[0205] assuming the index of the second common signal is 4, the index of the first common signal is 2, among three common signals at the same transmission moment, for any two common signals with adjacent frequency-domain positions, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M, then the second offset is (1 - 2) * M = -M.

[0206] As Figure 13E shown in b of assuming the index of the second common signal is 0, the index of the first common signal is 2, among three common signals at the same transmission moment, for any two common signals with adjacent frequency-domain positions, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M, then the second offset is (0 - 0) * M = 0. Assuming the index of the second common signal is 0, the index of the first common signal is 8, among three common signals at the same transmission moment, for any two common signals with adjacent frequency-domain positions, the number of frequency-domain units between them is the same, and the number of frequency-domain units between them is M, then the second offset is (2 - 0) * M = 2M.

[0207] Mode d: There are common signals with the same frequency-domain position among multiple common signals. The multiple common signals are indexed in the order of first from low to high in frequency-domain position and then from front to back in time-domain position.

[0208] Figure 13F The indexes of the multiple common signals shown are determined in the order of first from front to back in the time domain position and then from low to high in the frequency domain position.

[0209] For the above-mentioned manner d, in a possible implementation, the terminal may determine a first frequency domain indication value according to the index of the first common signal, determine a second frequency domain indication value according to the index of the second common signal, and further determine a second offset according to the difference between the two frequency domain indication values.

[0210] Exemplarily, the frequency domain indication value = (index of the common signal) mod (number of common signals transmitted at the same transmission moment).

[0211] Exemplarily, among at least one common signal at the same transmission moment, the number of frequency domain units between any two common signals with adjacent frequency domain positions is the same, and the number of frequency domain units is M. The second offset is the product of the difference between the first frequency domain indication value and the second frequency domain indication value and M.

[0212] As Figure 13F shown in a of, assume that the index of the second common signal is 3, the second frequency domain indication value = 3 mod 3 = 0, the index of the first common signal is 2, the first frequency domain indication value = 2 mod 3 = 2. Among the 3 common signals at the same transmission moment, the number of frequency domain units between any two common signals with adjacent frequency domain positions is the same, and the number of frequency domain units is M. Then the second offset is (2 - 0) * M = 2M. Assume that the index of the second common signal is 1, the second frequency domain indication value = 1 mod 3 = 1, the index of the first common signal is 3, the first frequency domain indication value = 3 mod 3 = 0. Among the 3 common signals at the same transmission moment, the number of frequency domain units between any two common signals with adjacent frequency domain positions is the same, and the number of frequency domain units is M. Then the second offset is (0 - 1) * M = -M.

[0213] As Figure 13F shown in b of, assume that the index of the second common signal is 0, the second frequency domain indication value = 3 mod 2 = 1, the index of the first common signal is 2, the first frequency domain indication value = 2 mod 2 = 0. Among the 3 common signals at the same transmission moment, the number of frequency domain units between any two common signals with adjacent frequency domain positions is the same, and the number of frequency domain units is M. Then the second offset is (0 - 1) * M = -M.

[0214] It can be understood that the above-mentioned manners a to d are only examples and are not limitations of this application.

[0215] For example, Figure 13G and Figure 13FSimilarly, each of the multiple common signals has two indexes, namely, a time-domain index and a frequency-domain index. Exemplarily, for any two common signals adjacent in frequency-domain positions among at least one common signal at the same transmission moment, the number of frequency-domain units between them is the same, and the number of frequency-domain units is M. The second offset is the product of the difference between the frequency-domain index of the first common signal and the frequency-domain index of the second common signal and M. For example, in Figure 13G , assuming the index of the second common signal is (0, 0), where the frequency-domain index of the second common signal is 0 and the time-domain index is also 0, and the index of the first common signal is (2, 1), the frequency-domain index of the first common signal is 2 and the time-domain index is also 1. For any two common signals adjacent in frequency-domain positions among the 3 common signals at the same transmission moment, the number of frequency-domain units between them is the same, and the number of frequency-domain units is M, then the second offset is (2 - 0) * M = 2M.

[0216] In a possible implementation, the frequency-domain position of the third common signal is the same as the frequency-domain position of the first common signal, and the time-domain position of the third common signal does not overlap with the time-domain position of the second common signal. Then, the offset of the starting frequency-domain position of the third common signal relative to the starting frequency-domain position of the second common signal is the same as the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal. Therefore, the third common resource block is the same as the first common resource block, and the third common resource block is the common resource block where the starting frequency-domain position of the third common signal is located. As shown in Figure 13E a, the common resource block corresponding to the common signal index 2 is the same as the common resource block corresponding to the common signal index 3. As shown in Figure 13F a, the common resource block corresponding to the common signal index 2 is the same as the common resource block corresponding to the common signal index 5. As shown in Figure 13G , the common resource block corresponding to the common signal index (0, 0) is the same as the common resource block corresponding to the common signal index (0, 1).

[0217] An embodiment of this application further provides a communication method, which includes: a base station sends a first common signal and a second common signal, and there are Z frequency-domain units between the starting frequency-domain positions of the first common signal and the second common signal, Z is an integer multiple of X, and the value of X satisfies max(1, 2 μ ), exemplarily, X = max(1, 2 μ ), 2 μis the ratio of the first SCS to the second SCS. The first SCS is the SCS of the common resource block, and the second SCS is the SCS of the first common signal. The SCS of the first common signal is the same as the SCS of the second common signal, and the frequency-domain positions of the first common signal and the second common signal do not overlap. Among them, the Z frequency-domain units are Z frequency-domain units under the second SCS, and Z is a positive integer.

[0218] Exemplarily, the base station may send one or more common signals. The terminal may detect the common signals at intervals of the synchronization grid, and the terminal device may detect (or receive) any one or more of the multiple common signals. By using the above method, the frequency-domain interval between each common signal is determined according to the SCS of the common resource block and the SCS of the common signal, so that the offset value between the starting frequency-domain position of each common signal and the starting frequency-domain position of the corresponding common resource block is consistent. Furthermore, the terminal can determine the frequency-domain position of the common resource block corresponding to the received common signal based on the same first offset.

[0219] Among them, the first offset is the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of the second common resource block. The second common resource block is the common resource block where the starting frequency-domain position of the second common signal is located. The first offset is also the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0220] Exemplarily, the first common signal carries the first offset, the second common signal carries the first offset, or the first offset is predefined. For example, the first common signal is SSB1, SSB1 carries the MIB, the MIB includes Kssb, and Kssb is the first offset. The second common signal is SSB2, SSB2 carries the MIB, and the MIB carried by SSB2 is the same as the MIB carried by SSB1, that is, the Kssb carried by SSB1 is the same as the Kssb carried by SSB2.

[0221] Exemplarily, the frequency-domain positions of the first common signal and the second common signal do not overlap. It can also be understood that the frequency-domain units included in the frequency-domain resources of the first common signal are different from the frequency-domain units included in the frequency-domain resources of the second common signal, or there are no identical frequency-domain units between the frequency-domain units included in the frequency-domain resources of the first common signal and the frequency-domain units included in the frequency-domain resources of the second common signal. For example, the frequency-domain unit can be a subcarrier or an RB, etc., and the present application does not limit this.

[0222] Exemplarily, there is at least partial overlap between the time-domain positions of the first common signal and the second common signal. It can also be understood that there is at least partial overlap between the time-domain resources of the first common signal and the second common signal.

[0223] For example, as shown in (a) of Figure 14 , the SCS of the common resource block is 60 KHz, the SCS of the common signal is 15 KHz, and X = 4. Therefore, the number of subcarriers of the frequency-domain position interval between the common signals transmitted by frequency division needs to be an integer multiple of 4. In Figure 14 (a), there are 20 RBs between the starting frequency-domain position of the first common signal and the starting frequency-domain position of the second common signal, that is, the common signals transmitted by frequency division are continuous in the frequency domain. At this time, the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block is the same as the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of the second common resource block.

[0224] For another example, as shown in (b) of Figure 14 , the SCS of the common resource block is 120 KHz, the SCS of the common signal is 15 KHz, and X = 8. Therefore, the number of subcarriers of the frequency-domain position interval between the common signals transmitted by frequency division needs to be an integer multiple of 8. In Figure 14 (b), there are 24 RBs between the starting frequency-domain position of the first common signal and the starting frequency-domain position of the second common signal. At this time, the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block is the same as the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of the second common resource block.

[0225] In a possible implementation, the center frequencies of some or all of the multiple common signals are located in the same synchronization grid. Or rather, the center frequencies of some or all of the multiple common signals are the same as the frequency positions of a synchronization grid. It can also be understood that the terminal can search for multiple common signals in one synchronization grid. For details, reference can be made to the relevant content about Figure 9 .

[0226] It can be understood that, to implement the functions in the above embodiments, the terminal device and the base station include the corresponding hardware structures and / or software modules for performing each function. Those skilled in the art should easily realize that, in combination with 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 the hardware depends on the specific application scenarios and design constraints of the technical solution.

[0227] Figure 15 and Figure 16Schematic diagram of a possible communication device provided for an embodiment of the present application. These communication devices can be used to implement the functions of the terminal device or the base station in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0228] As Figure 15 shown, the communication device 1500 includes a processing unit 1510 and a transceiver unit 1520. The communication device 1500 is used to implement the terminal device or the base station in the above method embodiments.

[0229] When the communication device 1500 is used to implement the functions of the terminal in the above Figure 7 shown method embodiments:

[0230] The transceiver unit 1520 is configured to receive a first common signal; the processing unit 1510 is configured to determine the starting frequency-domain position of a first common resource block according to the frequency-domain position of the first common signal and a first configuration; wherein, the first configuration indicates the frequency-domain position of a second common signal, the frequency-domain position of the first common signal is different from the frequency-domain position of the second common signal, and the first common resource block is the common resource block where the starting frequency-domain position of the first common signal is located.

[0231] In a possible design, the first configuration indicates the frequency-domain positions of multiple common signals, and the frequency-domain positions of the multiple common signals include the frequency-domain position of the first common signal and the frequency-domain position of the second common signal.

[0232] In a possible design, when the processing unit 1510 determines the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal and the first configuration, it determines the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and a first offset, where the first offset is the offset of the starting frequency-domain position of the second common signal relative to the starting frequency-domain position of a second common resource block, and the second common resource block is the common resource block where the starting frequency-domain position of the second common signal is located.

[0233] In a possible design, the first common signal carries the first offset, or the first offset is predefined.

[0234] In a possible design, when determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and the first offset, the processing unit 1510 determines a third offset according to the first offset and the second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0235] In a possible design, the third offset = (the first offset value + the second offset value) mod (C * X); where X = max(1, 2 μ ),2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0236] In a possible design, when determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal and the first configuration, the processing unit 1510 determines a third offset according to the second offset, where the second offset indicates the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the second common signal, and the third offset is the offset of the starting frequency-domain position of the first common signal relative to the starting frequency-domain position of the first common resource block.

[0237] In a possible design, the third offset = the second offset value mod (C * X); where X = max(1, 2 μ ),2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

[0238] In a possible design, the third offset is M, where M represents M subcarriers at the subcarrier spacing of the first common signal, and M is a non-negative integer.

[0239] In a possible design, the third offset is determined according to one or more of the first offset, the second offset, the subcarrier spacing of the first common resource block, or the subcarrier spacing of the first common signal.

[0240] In a possible design, the center frequencies of some or all of the multiple common signals are located in the same synchronization grid. Or rather, the center frequencies of some or all of the multiple common signals are the same as the frequency positions of a synchronization grid.

[0241] In a possible design, the frequency point of the synchronization grid is the center frequency point of the transmission pattern composed of the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the common signal with the lowest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the common signal with the highest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the center frequency point of the second common signal, the starting frequency domain position of the second common signal, or the ending frequency domain position of the second common signal.

[0242] In a possible design, at least part of the time domain positions of the first common signal and the second common signal overlap.

[0243] When the communication device 1500 is used to implement the functions of the base station in the above Figure 7 shown method embodiments:

[0244] The transceiver unit 1520 is used to transmit and receive information; the processing unit 1510 is used to send a first common signal through the transceiver unit 1520, and the starting frequency domain position of the first common resource block is determined according to the frequency domain position of the first common signal and the first configuration; wherein, the first configuration indicates the frequency domain position of the second common signal, and the frequency domain position of the first common signal is different from the frequency domain position of the second common signal; the first common resource block is the common resource block where the starting frequency domain position of the first common signal is located.

[0245] In a possible design, the first configuration indicates the frequency domain positions of multiple common signals, and the frequency domain positions of the multiple common signals include the frequency domain position of the first common signal and the frequency domain position of the second common signal. The transceiver unit 1520 is used to send the first common signal according to the first configuration when sending the first common signal.

[0246] In a possible design, the transceiver unit 1520 is used to send the second common signal.

[0247] In a possible design, the transceiver unit 1520 is used to send a third common signal, the frequency domain position of the third common signal is the same as the frequency domain position of the first common signal, and the time domain position of the first common signal does not overlap with the time domain position of the second common signal; the third common resource block is the same as the first common resource block, and the third common resource block is the common resource block where the starting frequency domain position of the third common signal is located.

[0248] In a possible design, at least part of the time domain positions of the first common signal and the second common signal overlap.

[0249] When the communication device 1500 is used to implement the functions of the base station in the above Figure 7 method embodiments shown:

[0250] The transceiver unit 1520 is used to transmit and receive information; the processing unit 1510 is used to send a first common signal through the transceiver unit 1520, and there is an interval of Z frequency domain units between the starting frequency domain position of the first common signal and the starting frequency domain position of the second common signal. Z is an integer multiple of X, and X = max(1, 2 μ ),2 μ is the ratio of the first SCS to the second SCS. The first SCS is the SCS of the common resource block, and the second SCS is the SCS of the first common signal. The SCS of the first common signal is the same as the SCS of the second common signal. The frequency domain positions of the first common signal and the second common signal are different, and Z is a positive integer.

[0251] In a possible design, the processing unit 1510 is used to send the second common signal through the transceiver unit 1520.

[0252] In a possible design, the Z frequency domain units are Z frequency domain units under the second SCS.

[0253] In a possible design, the first common signal carries a first offset, the second common signal carries the first offset, or the first offset is predefined; the first offset is the offset of the starting frequency domain position of the second common signal relative to the starting frequency domain position of the second common resource block, and the first offset is also the offset of the starting frequency domain position of the first common signal relative to the starting frequency domain position of the first common resource block. The first common resource block is the common resource block where the starting frequency domain position of the first common signal is located, and the second common resource block is the common resource block where the starting frequency domain position of the second common signal is located.

[0254] In a possible design, at least part of the time domain positions of the first common signal and the second common signal overlap.

[0255] For a more detailed description of the above processing unit 1510 and transceiver unit 1520, reference can be directly made to the relevant descriptions in the above method embodiments and will not be elaborated here.

[0256] Such as Figure 16As shown, communication device 1600 includes a processor 1610 and an interface circuit 1620. The processor 1610 and the interface circuit 1620 are coupled to each other. It can be understood that the interface circuit 1620 can be a transceiver or an input / output interface. Optionally, the communication device 1600 may further include a memory 1630 for storing instructions executed by the processor 1610 or for storing input data required for the processor 1610 to run instructions or for storing data generated after the processor 1610 runs instructions.

[0257] When the communication device 1600 is used to implement Figure 7 the method shown, the processor 1610 is used to implement the functions of the above-mentioned processing unit 1510, and the interface circuit 1620 is used to implement the functions of the above-mentioned transceiver unit 1520.

[0258] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), or 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 can be a microprocessor or any conventional processor.

[0259] In the present application, another example of a device is provided. The notification device includes at least one processor and at least one memory. The at least one processor and the at least one memory are coupled. The at least one memory is used to store instructions. When the instructions are executed by the at least one processor, the communication device executes the method in the above embodiments. Taking the communication device including one processor and one memory as an example, as Figure 16 shown, the communication device 1600 includes a processor 1610 and a memory 1630. The processor 1610 and the memory 1630 are coupled. The memory 1630 stores instructions. When the instructions stored in the memory 1630 are executed by the processor 1610, the communication device 1600 executes the method executed by the terminal device or the base station in the above embodiments.

[0260] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a removable hard disk, a 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 can also be a component of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the above-mentioned terminal device or base station. The processor and the storage medium can also exist as discrete components in the terminal device or base station.

[0261] 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 whole or in part in the form of a computer program product. 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 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.

[0262] In the 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, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0263] In this application, "at least one" means one or more, and "a plurality of" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. 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 textual description of this application, the character " / " generally represents an "or" relationship between the associated objects before and after; in the formulas of this application, the character " / " represents a "division" 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.

[0264] It can be understood that the various numerical numbers involved in the embodiments of this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The magnitudes of the serial numbers of the above processes do not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that, The method includes: Receiving a first common signal; Determining a starting frequency-domain position of a first common resource block according to a frequency-domain position of the first common signal and a first configuration; wherein, the first configuration indicates a frequency-domain position of a second common signal, the frequency-domain position of the first common signal is different from the frequency-domain position of the second common signal, and the first common resource block is a common resource block where the starting frequency-domain position of the first common signal is located.

2. The method according to claim 1, characterized in that, The first configuration indicates frequency-domain positions of a plurality of common signals, and the frequency-domain positions of the plurality of common signals include the frequency-domain position of the first common signal and the frequency-domain position of the second common signal.

3. The method according to claim 1 or 2, characterized in that, Determining a starting frequency-domain position of a first common resource block according to a frequency-domain position of the first common signal and a first configuration includes: Determining the starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and a first offset, where the first offset is an offset of a starting frequency-domain position of the second common signal relative to a starting frequency-domain position of a second common resource block, and the second common resource block is a common resource block where the starting frequency-domain position of the second common signal is located.

4. The method according to claim 3, wherein The first common signal carries the first offset, or the first offset is predefined.

5. The method according to claim 3 or 4, characterized in that, Determining a starting frequency-domain position of the first common resource block according to the frequency-domain position of the first common signal, the first configuration, and a first offset includes: Determining a third offset according to the first offset and a second offset, where the second offset indicates an offset of a starting frequency-domain position of the first common signal relative to a starting frequency-domain position of the second common signal, and the third offset is an offset of a starting frequency-domain position of the first common signal relative to a starting frequency-domain position of the first common resource block.

6. The method according to claim 5, characterized in that, The third offset = (the first offset value + the second offset value) mod (C * X); where X = max(1, 2 μ ), 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

7. The method according to claim 1 or 2, characterized in that, Determining a starting frequency-domain position of the first common resource block according to a frequency-domain position of the first common signal and a first configuration includes: Determining a third offset according to a second offset, where the second offset indicates an offset of a starting frequency-domain position of the first common signal relative to a starting frequency-domain position of the second common signal, and the third offset is an offset of a starting frequency-domain position of the first common signal relative to a starting frequency-domain position of the first common resource block.

8. The method according to claim 1 or 2, characterized in that The third offset = the second offset value mod (C * X); where X = max(1, 2 μ ), 2 μ is the ratio of the subcarrier spacing of the first common resource block to the subcarrier spacing of the first common signal, and C is a constant.

9. The method according to claim 6 or 8, characterized in that The third offset is M, and M represents M subcarriers at a subcarrier spacing of the first common signal, and M is a non-negative integer.

10. The method according to any one of claims 2-9, characterized in that, Center frequencies of some or all of the plurality of common signals are located in the same synchronization grid.

11. The method according to any one of claims 2-10, characterized in that, The frequency point of the synchronization grid is the central frequency point of the transmission pattern composed of the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the common signal with the lowest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the common signal with the highest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the second common signal, the start frequency domain position of the second common signal, or the end frequency domain position of the second common signal.

12. The method according to any one of claims 1-11, characterized in that, There is at least an overlap in the time domain position between the first common signal and the second common signal.

13. A communication method, characterized in that, The method includes: Transmitting a first common signal, where the start frequency domain position of the first common resource block is determined according to the frequency domain position of the first common signal and a first configuration; wherein, the first configuration indicates the frequency domain position of a second common signal, and the frequency domain position of the first common signal is different from the frequency domain position of the second common signal; the first common resource block is the common resource block where the start frequency domain position of the first common signal is located.

14. The method according to claim 13, wherein The first configuration indicates the frequency domain positions of multiple common signals, and the frequency domain positions of the multiple common signals include the frequency domain position of the first common signal and the frequency domain position of the second common signal; Transmitting the first common signal includes: Transmitting the first common signal according to the first configuration.

15. The method according to claim 13 or 14, characterized in that, It further includes: Transmitting a third common signal, where the frequency domain position of the third common signal is the same as the frequency domain position of the first common signal, and there is no overlap in the time domain position between the first common signal and the second common signal; the third common resource block is the same as the first common resource block, and the third common resource block is the common resource block where the start frequency domain position of the third common signal is located.

16. The method according to any one of claims 13-15, characterized in that, There is at least a partial overlap in the time domain position between the first common signal and the second common signal.

17. The method according to any one of claims 14 to 16, characterized in that, The central frequency points of some or all of the multiple common signals are located in the same synchronization grid.

18. The method according to any one of claims 14 to 17, characterized in that, The frequency point of the synchronization grid is the central frequency point of the transmission pattern composed of the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the common signal with the lowest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the common signal with the highest frequency domain position among the multiple common signals, or the frequency point of the synchronization grid is the central frequency point of the second common signal, the start frequency domain position of the second common signal, or the end frequency domain position of the second common signal.

19. A communication device, characterized in that, It includes a unit or module for executing the method according to any one of claims 1 to 18.

20. A communication device, characterized in that, The communication device includes at least one processor; the at least one processor is used to execute the method according to any one of claims 1 to 18.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a program, and when the program runs on the device, the device is caused to execute the method according to any one of claims 1 to 18.

22. A computer program product, characterized in that, The computer program product includes a program or instruction, and when the program or instruction is executed by the device, the device is caused to execute the method according to any one of claims 1 to 18.

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