Signal transmission method and related apparatus

Abstract

Provided are a signal transmission method and a related apparatus. The method comprises: sending a plurality of SSBs; and sending a plurality of first-type signals, wherein the plurality of first-type signals are in one-to-one correspondence with the plurality of SSBs, the plurality of first-type signals are used for scheduling a plurality of second-type signals, the plurality of first-type signals are in one-to-one correspondence with the plurality of second-type signals, the plurality of first-type signals occupy the same time slot and occupy different frequency-domain resources. In this way, the percentage of the time slot occupied by the first-type signals is reduced, and the time slot originally used for transmitting the first-type signals can be used for transmitting other signals, thereby improving the downlink capacity. Similarly, the plurality of second-type signals occupy the same time slot and occupy different frequency-domain resources. In this way, the percentage of the time slot occupied by the second-type signals can be reduced, and the time slot originally used for transmitting the second-type signals can be used for transmitting other signals, thereby improving the downlink capacity.

Description

Signal transmission method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 23, 2024, with application number 202410094707.7 and application name “A Signal Transmission Method and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a signal transmission method and related devices. Background Art

[0003] The synchronization signal / physical broadcast channel block (SS / PBCH) (abbreviated as SSB) is the basis for cell search. The synchronization signal includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). The PSS / SSS and the physical broadcast channel (PBCH) signal are together called the SSB. Among them, the master information block (MIB) is transmitted on the PBCH, and the MIB is used to carry the scheduling information of the system information block (SIB), etc. For example, the terminal can obtain the time-frequency resources of SIB 1 corresponding to the SSB based on the MIB carried in the PBCH, and then demodulate SIB 1.

[0004] At present, the time slot ratio of SIB 1 is relatively high, resulting in poor downlink capacity. Among them, SIB 1 includes a first type of signal carried on the physical downlink control channel (physical downlink control channel, PDCCH) and a second type of signal carried on the physical downlink shared channel (physical downlink shared channel, PDSCH). For example, during the initial access process, the SSB period is 20ms. Within this 20ms, the network device can use 8 beams to send SSB. After the network device uses the above 8 beams to send SSB, it can send SIB 1 after several time slots, occupying a total of 8 downlink time slots. Therefore, within this 20ms, the time slot ratio of SIB 1 is relatively high, which leads to low downlink capacity. Summary of the Invention

[0005] The present application provides a signal transmission method and related devices to improve downlink capacity.

[0006] In the first aspect, the present application provides a signal transmission method, which can be executed by a communication device. The communication device can be a network device, or a component configured in the network device (such as a chip, chip system, etc.), or it can also be a logic module or software that can realize all or part of the functions of the network device. The present application does not limit this.

[0007] Exemplarily, the method includes: sending multiple SSBs; sending multiple first-class signals, the multiple first-class signals corresponding one-to-one to the above-mentioned multiple SSBs, the multiple first-class signals being used to schedule multiple second-class signals, the multiple first-class signals corresponding one-to-one to the above-mentioned multiple second-class signals, the multiple first-class signals occupying the same time slots, and the multiple first-class signals occupying different frequency domain resources.

[0008] The first type of signal may refer to a signal carried on a PDCCH, and the second type of signal may refer to a signal carried on a PDSCH, such as a system message. In practical applications, the first type of signal and the second type of signal may be considered as a whole (i.e., a SIB), and the SIB may be, for example, SIB 1.

[0009] The above-mentioned multiple first-class signals may refer to multiple first-class signals within a time slot, for example, two first-class signals within a time slot; similarly, the above-mentioned multiple second-class signals may refer to multiple second-class signals within a time slot, for example, two second-class signals within a time slot.

[0010] In addition, in the present application, the above-mentioned multiple first-class signals and the above-mentioned multiple second-class signals are one-to-one corresponding, or in other words, when the network device sends a first-class signal, it will send a second-class signal, wherein the first-class signal can be carried on the PDCCH, and the second-class signal can be carried on the PDSCH. In the present application, the time slots occupied by the above-mentioned multiple first-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-class signals are different, that is, the above-mentioned multiple first-class signals can be frequency-division multiplexed. When the above-mentioned multiple first-class signals are frequency-division multiplexed, the above-mentioned multiple second-class signals are also frequency-division multiplexed. In other words, the time slots occupied by the above-mentioned multiple first-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-class signals are different, which can also be replaced by: the time slots occupied by the above-mentioned multiple second-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple second-class signals are different.

[0011] It can be understood that the signal carried on the above-mentioned PDCCH (that is, the first type of signal) and the signal carried on the PDSCH (that is, the second type of signal) can occupy the same time slot. In this case, the time slots occupied by the above-mentioned multiple first-type signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-type signals are different. It can also be replaced by: the time slots occupied by multiple SIBs are the same (SIBs include first-type signals and second-type signals), and the frequency domain resources occupied by the above-mentioned multiple SIBs are different. In addition, the above-mentioned multiple SIBs can be multiple SIBs within a time slot, for example, two SIBs within a time slot.

[0012] The signal carried on the above-mentioned PDCCH (i.e., the first type of signal) and the signal carried on the PDSCH (i.e., the second type of signal) can also occupy different time slots. In other words, the first type of signal and the second type of signal can also cross time slots, which is not limited in this application.

[0013] In the above technical solution, after the network device sends multiple SSBs, it can send multiple first-class signals corresponding to the above-mentioned multiple SSBs. These multiple first-class signals are used to schedule multiple second-class signals. These multiple first-class signals occupy the same time slots but different frequency domain resources. In other words, these multiple first-class signals can be frequency-division multiplexed. In this way, the time slot ratio can be reduced, and the time slot originally used to transmit the first-class signal can be used to transmit other signals, which is conducive to improving the downlink capacity. In addition, in the same time slot, transmitting the above-mentioned multiple first-class signals on different frequency domain resources is conducive to reducing the waste of frequency domain resources and improving the utilization rate of frequency domain resources compared to transmitting one first-class signal in one time slot. Similarly, the above-mentioned multiple second-class signals occupy the same time slots but different frequency domain resources. In this way, the time slot ratio of the second-class signal can be reduced, and the time slot originally used to transmit the second-class signal can be used to transmit other signals, which is conducive to improving the downlink capacity.

[0014] On the second aspect, the present application provides a signal transmission method, which can be executed by a communication device. The communication device can be a terminal, or a component configured in the terminal (such as a chip, chip system, etc.), or it can also be a logic module or software that can realize all or part of the terminal functions. The present application does not limit this.

[0015] Exemplarily, the method includes: receiving a first SSB, where the first SSB is one of multiple SSBs; receiving a first signal, where the first signal is one of multiple first-category signals, where the multiple first-category signals correspond one-to-one to the multiple SSBs, where the multiple first-category signals are used to schedule multiple second-category signals, where the multiple first-category signals correspond one-to-one to the multiple second-category signals, where the multiple first-category signals occupy the same time slots, and where the multiple first-category signals occupy different frequency domain resources. For a description of the first-category signals and the second-category signals, please refer to the first aspect and will not be repeated here.

[0016] In the above technical solution, the multiple first-class signals used to schedule multiple second-class signals occupy the same time slots but different frequency domain resources. That is to say, these multiple first-class signals can be frequency-division multiplexed. In this way, the time slot ratio is reduced, and the time slot originally used to transmit the first-class signal can be used to transmit other signals, which is beneficial to improving the downlink capacity. In addition, in the same time slot, transmitting the above-mentioned multiple first-class signals on different frequency domain resources is beneficial to reducing the waste of frequency domain resources and improving the utilization rate of frequency domain resources compared to transmitting one first-class signal in one time slot. Similarly, the above-mentioned multiple second-class signals occupy the same time slots but different frequency domain resources. In this way, the time slot ratio of the second-class signal can be reduced, and the time slot originally used to transmit the second-class signal can be used to transmit other signals, which is beneficial to improving the downlink capacity.

[0017] In combination with the first aspect and the second aspect, in some possible implementations, the first signal and the first SSB occupy different frequency domain resources. The first signal is one of the multiple first-category signals, and the first SSB is the SSB corresponding to the first signal among the multiple SSBs.

[0018] As mentioned before, the above-mentioned multiple first-category signals and the above-mentioned multiple second-category signals are one-to-one corresponding. Therefore, the frequency domain resources occupied by the first signal and the first SSB are different, which can also be replaced by: the frequency domain resources occupied by the second signal and the first SSB are different, wherein the second signal is the second-category signal corresponding to the first SSB among the multiple second-category signals; or, the frequency domain resources occupied by the first SIB and the first SSB are different, wherein the first SIB is the SIB corresponding to the first SSB among the above-mentioned multiple SIBs.

[0019] Taking the first SSB among multiple SSBs as an example, the first SSB and the first signal corresponding to the first SSB occupy different frequency domain resources, that is, the first signal and the first SSB are frequency division multiplexed. In this way, the time slot originally used to transmit the first signal can be used to transmit other signals, thereby reducing the downlink time slot ratio of the first signal and the first SSB and improving the downlink capacity.

[0020] It should be noted that, in the present application, the above-mentioned multiple first-class signals and the above-mentioned multiple SSBs may also occupy the same frequency domain resources, that is, the above-mentioned multiple SSBs and the above-mentioned multiple first-class signals are time-division transmitted, and the above-mentioned multiple first-class signals are frequency-division multiplexed, that is, the above-mentioned multiple first-class signals occupy the same time slots and occupy different frequency domain resources, but the multiple first-class signals and the above-mentioned multiple SSBs occupy different time slots and occupy the same frequency domain resources. In this way, a portion of the time slots used to transmit the first-class signals can also be saved for transmitting other signals, thereby increasing the downlink capacity. Exemplarily, after the network device sends the above-mentioned multiple SSBs in the first time slot, it sends the above-mentioned multiple first-class signals in the second time slot. The frequency domain resources occupied by the multiple first-class signals are different, wherein the second time slot can be, for example, the next time slot of the first time slot.

[0021] Similarly, the above-mentioned multiple second-class signals and the above-mentioned multiple SSBs can also occupy the same frequency domain resources, that is, the above-mentioned multiple SSBs and the above-mentioned multiple second-class signals are time-division transmitted, and the above-mentioned multiple second-class signals are frequency-division multiplexed, that is, the above-mentioned multiple second-class signals occupy the same time slots and different frequency domain resources, but the multiple second-class signals and the above-mentioned multiple SSBs occupy different time slots and the same frequency domain resources. In this way, a part of the time slots used to transmit the second-class signals can also be saved for transmitting other signals, thereby improving the downlink capacity. Exemplarily, after the network device sends the above-mentioned multiple SSBs in the first time slot, it sends the above-mentioned multiple second-class signals in the second time slot. The frequency domain resources occupied by the multiple second-class signals are different, wherein the second time slot can be, for example, the next time slot of the first time slot.

[0022] In combination with the first aspect and the second aspect, in some possible implementations, the first signal and the first SSB occupy the same time slot or different time slots.

[0023] In the present application, the first signal, the second signal, and the first SIB are one-to-one corresponding, wherein the first SIB includes the first signal and the second signal, the first signal is one of the above-mentioned multiple first-category signals, and the second signal is the second-category signal corresponding to the first signal among the above-mentioned multiple second-category signals. Therefore, in the description below, the first signal and the first SSB occupy the same time slot or different time slots, which can be replaced by: the first SIB and the first SSB occupy the same time slot or different time slots; or, the second signal and the first SSB occupy the same time slot or different time slots.

[0024] When the first signal and the first SSB occupy different frequency domain resources, the first signal and the first SSB corresponding to the first signal may occupy the same time slot, that is, the time slot in which the first signal is located is the same as the time slot in which the first SSB is located. The first signal and the first SSB corresponding to the first signal may also occupy different time slots, that is, the first signal and the first SSB occupy different time slots and different frequency domain resources.

[0025] In combination with the first aspect and the second aspect, in some possible implementations, the offset of the frequency domain resources occupied by the first signal relative to the first frequency domain reference is predefined or indicated by the first indication information carried in the first SSB.

[0026] The offset of the frequency domain resources occupied by the first signal relative to the first frequency domain reference may be referred to as the frequency domain offset corresponding to the first signal.

[0027] One possible design is that the network device indicates the frequency domain offset corresponding to the first signal to the terminal, so that the network device can flexibly configure the frequency domain offset corresponding to the first signal.

[0028] Another possible design is that the frequency domain offset corresponding to the first signal is predefined, so that signaling overhead can be saved.

[0029] Optionally, the first frequency domain reference may be the frequency domain resource occupied by the first SSB. That is, the frequency domain offset corresponding to the first signal may refer to an offset relative to the frequency domain resource occupied by the first SSB.

[0030] In combination with the first aspect and the second aspect, in some possible implementations, the first SSB carries second indication information, which indicates that the first SSB and the first signal are frequency-division multiplexed, and the above-mentioned frequency-division multiplexing is one of multiple multiplexing modes, and the above-mentioned multiple multiplexing modes include time division multiplexing and / or frequency division multiplexing.

[0031] The network device can indicate the multiplexing mode of the first SSB and the first signal to the terminal. In this way, the multiplexing mode of the first SSB and the first signal can be flexibly adjusted. For example, when there is a lot of data to be transmitted, the network device can indicate to the terminal that the first SSB and the first signal are frequency-division multiplexed, leaving more time domain resources to transmit data signals. When there is less data to be transmitted, the network device can indicate to the terminal that the first SSB and the first signal are time-division multiplexed. This application does not limit this.

[0032] In combination with the first aspect and the second aspect, in some possible implementations, the system frame number, time slot number and start symbol of the first signal are predefined or indicated by the third indication information in the first SSB.

[0033] One possible design is that the network device indicates the system frame number, time slot number and starting symbol of the first signal to the terminal, so that the network device can flexibly configure the system frame number, time slot number and starting symbol of the first signal.

[0034] Another possible design is that the system frame number, time slot number, and start symbol of the first signal are predefined, thereby saving signaling overhead.

[0035] In combination with the first aspect and the second aspect, in some possible implementations, the system frame number of the first signal is the same as the system frame number of the first SSB.

[0036] In this case, the time slot number of the first signal is the same as the time slot number of the first SSB, that is, the time slots occupied by the first signal and the first SSB are the same; or, the time slot number of the first signal = the time slot number of the first SSB + n, that is, the time slots occupied by the first signal and the first SSB are different, where n is a positive integer and n≤the number of time slots included in a system frame - 1.

[0037] The time slot number of the first signal = the time slot number of the first SSB + n is only an example and should not constitute any limitation to this application. Simple transformations of the above formula should also fall within the scope of protection of this application. For example, the time slot number of the first signal = the time slot number of the first SSB - n.

[0038] In addition, in the present application, the relationship between the system frame number, time slot number and start symbol of the first signal and the system frame number, time slot number and start symbol of the first SSB is taken as an example of a formula, but this should not constitute any limitation to the present application. For example, it can also be in the form of a table, array, queue, container, stack, linear list, pointer, linked list, tree, graph, structure, class, heap, hash table or hash table.

[0039] In combination with the first and second aspects, in certain possible implementations, the system frame number of the first signal = the system frame number of the first SSB + m, where m is the number of system frames included in an SSB period. In other words, the first signal and the first SSB occupy different time slots.

[0040] For example, assuming that one SSB period is 20 ms, then m=2.

[0041] When the system frame number of the first signal = the system frame number of the first SSB + m, the time slot number of the first signal = the time slot number corresponding to the first SSB in the next SSB cycle.

[0042] In combination with the first aspect and the second aspect, in some possible implementations, the demodulation reference signal (DMRS) corresponding to the first signal is a first DMRS, the DMRS corresponding to the second signal is a second DMRS, the port numbers of the first DMRS and the second DMRS are the same, and the precoding granularity of the first DMRS and the second DMRS is the same, the first signal is one of the above-mentioned multiple first-category signals, and the second signal is a second-category signal corresponding to the first signal among the above-mentioned multiple second-category signals.

[0043] Among them, the DMRS corresponding to the above-mentioned first signal can be replaced with the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal can be replaced with the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as the DMRS that can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as the DMRS that can be used to demodulate the PDSCH.

[0044] The port number of the first DMRS and the second DMRS are the same, and the precoding granularity of the first DMRS and the second DMRS are the same. In this way, the first DMRS can also be used to demodulate PDSCH, that is, the resources used for PDSCH channel estimation are increased, which is beneficial to improve the estimation accuracy of PDSCH.

[0045] In combination with the first aspect and the second aspect, in some possible implementations, the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS, the time domain resources occupied by the DMRS include the first symbol and the second symbol, the frequency domain resources occupied by the DMRS on the first symbol and the second symbol are the same or different, the first signal is one of the above-mentioned multiple first-type signals, and the second signal is the second-type signal corresponding to the first signal among the above-mentioned multiple second-type signals.

[0046] Among them, the DMRS corresponding to the above-mentioned first signal can be replaced with the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal can be replaced with the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as the DMRS that can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as the DMRS that can be used to demodulate the PDSCH.

[0047] The DMRS is a dual-symbol signal. The DMRS occupies the same frequency domain resources in the first and second symbols. This allows the DMRS location originally used to transmit the first signal to be used for the second signal. Furthermore, the DMRS occupies the same frequency domain resources in the first and second symbols, effectively transmitting the DMRS used for channel estimation multiple times, which improves channel estimation accuracy.

[0048] In a third aspect, the present application provides a communications device that can implement the method described in the first aspect and any possible implementation of the first aspect, or the method described in the second aspect and any possible implementation of the second aspect. The device includes corresponding modules for executing the above methods. The modules included in the device can be implemented in software and / or hardware.

[0049] In a fourth aspect, the present application provides a communication device comprising a processor, which can be used to execute a computer program in a memory to implement the method described in the first aspect and any possible implementation of the first aspect, or to implement the method described in the second aspect and any possible implementation of the second aspect.

[0050] Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface. The communication interface is configured to receive signals from other communication devices outside the device and transmit them to the processor, or to transmit signals from the processor to other communication devices outside the device. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0051] Optionally, the apparatus further comprises a memory, the processor being coupled to the memory. The memory is configured to store program instructions and data. The memory is coupled to the processor, and when the processor executes instructions stored in the memory, the methods described in the above aspects can be implemented.

[0052] In a fifth aspect, the present application provides a communication device comprising a processor and a communication interface, wherein the communication interface is configured to receive signals from other communication devices outside the communication device and transmit them to the processor, or to send signals from the processor to other communication devices outside the communication device, and the processor implements the signal transmission method described in the first aspect and any possible implementation of the first aspect through a logic circuit or by executing code instructions, or implements the signal transmission method described in the second aspect and any possible implementation of the second aspect. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0053] Optionally, the apparatus further includes a memory for storing instructions and data. The memory may be coupled to the processor, and when the processor executes the instructions stored in the memory, the processor implements the signal transmission method described in the first aspect and any possible implementation of the first aspect, or implements the signal transmission method described in the second aspect and any possible implementation of the second aspect.

[0054] In a sixth aspect, the present application provides a communication device comprising a processor and a memory, wherein the memory is used to store instructions and data. When the processor executes the instructions stored in the memory, it can implement the signal transmission method described in the first aspect and any possible implementation of the first aspect, or implement the signal transmission method described in the second aspect and any possible implementation of the second aspect.

[0055] Optionally, the device further includes a communication interface, which is used for the device to communicate with other communication devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin or other types of communication interfaces.

[0056] In the seventh aspect, the present application provides a computer-readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed, it implements the method described in the first aspect and any possible implementation of the first aspect, or implements the method described in the second aspect and any possible implementation of the second aspect.

[0057] In an eighth aspect, the present application provides a computer program product comprising instructions, which, when executed, implement the method described in the first aspect and any possible implementation of the first aspect, or implement the method described in the second aspect and any possible implementation of the second aspect.

[0058] In the ninth aspect, the present application provides a chip system comprising at least one processor for supporting the implementation of the functions involved in the first aspect and any possible implementation of the first aspect, or for supporting the implementation of the functions involved in the second aspect and any possible implementation of the second aspect, for example, receiving or processing the data involved in the above method, etc.

[0059] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0060] The chip system can be composed of chips, or can include chips and other discrete devices.

[0061] In the tenth aspect, the present application provides a communication system, which includes a network device and a terminal, the network device is used to implement the method described in the first aspect and any possible implementation method of the first aspect, and the terminal is used to implement the method described in the second aspect and any possible implementation method of the second aspect.

[0062] It should be understood that the third to tenth aspects of the present application correspond to the technical solutions of the first and second aspects of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] FIG1 is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided in this application;

[0064] FIG2 is a schematic diagram of an access network device applicable to the signal transmission method provided in this application;

[0065] FIG3 is a schematic diagram of the format of time-frequency resources for transmitting SSB provided in an embodiment of the present application;

[0066] FIG4 is a schematic diagram of the initial access process according to an embodiment of the present application;

[0067] FIG5 is a schematic diagram of a DMRS provided in an embodiment of the present application;

[0068] FIG6 is a schematic diagram of a multiplexing mode of SSB and SIB 1 provided in an embodiment of the present application;

[0069] FIG7 is a schematic diagram of the time slot ratios of SSB and SIB 1 provided in an embodiment of the present application;

[0070] FIG8 is a schematic flow chart of a signal transmission method provided in an embodiment of the present application;

[0071] FIG9 is a schematic diagram of SIB 1 and SSB multiplexing provided in an embodiment of the present application;

[0072] FIG10A is another schematic diagram of SIB and SSB multiplexing provided in an embodiment of the present application;

[0073] FIG10B is another schematic diagram of SIB and SSB multiplexing provided in an embodiment of the present application;

[0074] FIG11 is a schematic diagram of a starting symbol of a first SSB provided in an embodiment of the present application;

[0075] FIG12 is a schematic diagram of a DMRS provided in an embodiment of the present application;

[0076] FIG13a and FIG13b are schematic diagrams of component carrier switching for frequency division multiplexing provided in an embodiment of the present application;

[0077] FIG14 is a schematic block diagram of a communication device provided in an embodiment of the present application;

[0078] FIG15 is another schematic block diagram of a communication device provided in an embodiment of the present application;

[0079] FIG16 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0080] FIG17 is another schematic structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0081] The technical solution in this application will be described below with reference to the accompanying drawings.

[0082] To facilitate understanding of the technical solution provided by this application, the following points are first explained:

[0083] First, in this application, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a device, system, product or apparatus comprising a series of modules, modules or units is not necessarily limited to those modules, modules or units explicitly listed, but may include other modules, modules or units that are not explicitly listed or are inherent to these devices, systems, products or apparatuses.

[0084] Second, in this application, indications include explicit indications (also called direct indications) and implicit indications (also called indirect indications). Specifically, explicit indication information A refers to including information A; implicit indication information A refers to indicating information A through the correspondence between information A and information B and directly indicating information B. The correspondence between information A and information B can be predefined, pre-stored, pre-burned, or pre-configured; or, it can also refer to indicating information A through information B and preset rules.

[0085] Third, in this application, information C is used to determine information D, which includes both information D being determined solely based on information C and information D being determined based on information C and other information. Furthermore, information C can also be used to determine information D indirectly, for example, when information D is determined based on information E, and information E is determined based on information C.

[0086] Fourth, in this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship, but it does not exclude the situation where it indicates that the previous and next associated objects are in an "and" relationship. The specific meaning can be understood in conjunction with the context. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0087] Fifth, in this application, prefixes such as "first" and "second" are used solely to distinguish between different items within the same category and do not constrain the order, size, or quantity of items. For example, "first indication information" and "second indication information" are simply different indications; there is no temporal, size, or priority relationship between the two.

[0088] Sixth, in this application, "sending" and "receiving" indicate the direction of signal transmission. For example, "sending information to a network device" can be understood as the destination end of the information being the network device, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from a terminal" can be understood as the source end of the information being the terminal, which can include direct receiving from the terminal through the air interface, and also includes indirect receiving from the terminal through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0089] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal; or it can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0090] Seventh, in this application, "when", "if" and "if" all mean that the device will take corresponding actions under certain objective circumstances. It does not limit the time, nor does it require that the device must make a judgment when it is implemented, nor does it mean that there are other limitations.

[0091] Eighth, in this application, words such as "example," "exemplarily," "for example," or "such as" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "example," "exemplarily," "for example," or "such as" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "example," "exemplarily," "for example," or "such as" is intended to present the relevant concepts in a concrete manner.

[0092] Ninth, in this application, pre-configuration can be understood as preset, pre-defined, defined, pre-defined, stored, pre-stored, pre-negotiated, pre-made, or preset, etc.

[0093] Tenth, the correspondences shown in the tables of this application can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by this application. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences illustrated in each table. For example, in the tables of this application, the correspondences shown in certain rows may not be configured. For another example, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also use other names that can be understood by the communication device, and the values ​​or representations of the parameters may also use other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables.

[0094] Eleventh, the technical solutions provided in this application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), sidelink (SL) communication system, universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) mobile communication system or new radio access technology (NR). Among them, the 5G mobile communication system may include non-standalone (NSA) and / or standalone (SA). The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. This application is not limited to this.

[0095] Figure 1 is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided in this application. Figure 1 shows a schematic diagram of a possible, non-limiting system architecture.

[0096] As shown in Figure 1 , communications system 1000 includes a radio access network (RAN) 100 and a core network (CN) 200. RAN 100 includes at least one RAN node (e.g., 110a and 110b in Figure 1 , collectively referred to as 110) and at least one terminal (e.g., 120a-120j in Figure 1 , collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment (not shown in Figure 1 ). Terminal 120 is wirelessly connected to RAN node 110. RAN node 110 is wirelessly or wiredly connected to core network 200. The core network equipment in core network 200 and RAN node 110 in RAN 100 may be separate physical devices, or they may be a single physical device that integrates core network logical functions and radio access network logical functions.

[0097] The RAN 100 may be a cellular system related to the Third Generation Partnership Project (3GPP), such as a 4G or 5G mobile communication system, or a future-oriented evolutionary system (such as a 6G mobile communication system). The RAN 100 may also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. The RAN 100 may also be a communication system that integrates two or more of the above systems.

[0098] RAN node 110, sometimes also referred to as access network equipment, RAN entities, access nodes, or network equipment, is part of a communication system that facilitates wireless access for terminals. Multiple RAN nodes 110 in communication system 1000 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal 120j accessing RAN 100 via network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functionality, and network elements 120a-120j can be understood as communication devices with terminal functionality.

[0099] In one possible scenario, a RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a Wi-Fi system. A RAN node may be a macro base station (such as 110a in Figure 1 ), a micro base station or an indoor station (such as 110b in Figure 1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario. Alternatively, a RAN node may be a server, a wearable device, a vehicle, or an onboard device. For example, the access network device in vehicle-to-everything (V2X) technology may be a roadside unit (RSU).

[0100] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0101] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called open CU (open-CU, O-CU), DU may also be called open DU (open-DU, O-DU), CU-CP may also be called open CU-CP (open-CU-CP, O-CU-CP), CU-UP may also be called open CU-UP (open-CU-UP, O-CU-UP), and RU may also be called open RU (open-RU, O-RU). For convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0102] A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, or mobile terminal. Terminals may include, but are not limited to, mobile phones, tablet computers, computers with wireless transceiver capabilities, virtual reality (VR) devices, augmented reality (AR) devices, mixed reality (MR) devices, extended reality (XR) devices, wireless terminals in industrial control, in-vehicle equipment, wireless terminals in autonomous driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wearable devices, video players, and full-range projectors.

[0103] In the present application, the network device may be, for example, the RAN node 110 shown in FIG. 1 , and the terminal may be, for example, the terminal 120 shown in FIG. 1 . The present application does not specifically limit the types of the network device and the terminal.

[0104] In addition, terminals and network devices can be hardware devices, or software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of terminals and network devices.

[0105] FIG2 is a schematic diagram of an access network device applicable to the signal transmission method provided in this application.

[0106] As shown in Figure 2, access network equipment includes one or more CUs, one or more DUs, and one or more RUs. For clarity, Figure 2 shows only one CU, DU, and RU. The CU is used to connect to the core network and one or more DUs. Optionally, the CU can have some of the core network's functions. The CU can include a CU-CP and a CU-UP.

[0107] The CU and DU can be configured according to the protocol layer functions of the wireless network they implement: for example, the CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above it (such as the radio resource control (RRC) layer and / or the service data adaptation protocol (SDAP) layer, etc.); the DU is configured to implement the functions of the protocol layers below the PDCP layer (such as the radio link control (RLC) layer, the medium access control (MAC) layer, and / or the physical (PHY) layer, etc.). For another example, the CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the PDCP layer and the protocol layers below it (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0108] When the CU includes a CU-CP and a CU-UP, the CU-CP is used to implement the control plane (C-plane) functions of the CU, and the CU-UP is used to implement the user plane (U-plane) functions of the CU. For example, when the CU is configured to implement the functions of the PDCP layer, RRC layer, and SDAP layer, the CU-CP is used to implement the RRC layer functions and the control plane (PDCP part of PDCP, PDCP-C) layer functions of the PDCP layer, and the CU-UP is used to implement the SDAP layer functions and the user plane (PDCP part of PDCP, PDCP-U) layer functions of the PDCP layer.

[0109] The CU-CP can interact with network elements in the core network that implement control plane functions. The network elements in the core network that implement control plane functions can be access and mobility function network elements, such as the access and mobility management function (AMF) network element in the 5G system. The AMF network element is responsible for mobility management in the mobile network, such as location update of terminal devices, registration network of terminal devices, and switching of terminal devices.

[0110] The CU-UP can interact with network elements in the core network that implement user plane functions. Network elements in the core network that implement user plane functions, such as the user plane function (UPF) network element in the 5G system, are responsible for forwarding and receiving data in terminal devices.

[0111] The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, the CU or DU can be configured to have the functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of the CU or DU can be divided according to the service type or other system requirements, such as by delay, and the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.

[0112] The DU and RU can work together to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in a variety of ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer functions in the PHY layer (corresponding to the high physical layer in Figure 2), and the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions (corresponding to the low physical layer in Figure 2) and the radio frequency (RF) function. The high-layer functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-layer functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0113] The RU can be a TRP, remote radio head (RRH), or other entity with similar functionality. The lower physical layer includes physical layer processing, such as fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), digital beamforming, and filtering. The RU communicates with one or more terminals over a wireless link.

[0114] The DU and RU may or may not be co-located. The DU and RU exchange control plane information and user plane information via the lower-layer split CUS-plane (LLS-CUS) interface over the fronthaul link. The LLS-CUS interface may include an LLS-C interface and an LLS-U interface that provide the control plane and user plane, respectively. In some examples, the control plane refers to real-time control between the DU and RU. The DU and RU exchange management information via the LLS-M interface of the fronthaul link, and the management (M)-plane refers to non-real-time management operations between the DU and RU.

[0115] It should be understood that the structure of the access network device shown in Figure 2 is only an example and should not constitute any limitation to this application. Among them, the access network device shown in Figure 2 can be, for example, an O-RAN device, the CU can be replaced by an O-CU, the DU can be replaced by an O-DU, the RU can be replaced by an O-RU, the CU-CP can be replaced by an O-CU-CP, the CU-UP can be replaced by an O-CU-UP, the RAN CUS-plane can be replaced by an O-RAN CUS-plane, and the RAN M-plane can be replaced by an O-RAN M-plane.

[0116] In order to better understand the method provided by this application, the terms involved in this application are briefly explained below.

[0117] 1. SSB: It is the basis for cell search. Synchronization signals include PSS and SSS. PSS / SSS and PBCH signals together are called SSB. Among them, MIB is transmitted on PBCH, and MIB is used to carry SIB scheduling information, etc. The terminal can obtain SIB information by reading MIB information. SIB is mainly divided into SIB 1 to SIB 13. Among them, SIB 1 is mainly used to evaluate whether the terminal is allowed to access a certain cell, and is used to carry scheduling information of other system information blocks. The functions of SIB 2 to SIB 13 can be found in the relevant protocols and will not be described in detail here.

[0118] In this application, SSB corresponds to SIB, which can be understood as follows: SSB includes PBCH signal, and the MIB carried in the PBCH signal can be used to indicate one or more of the following: whether the current cell is accessible, whether the terminal supports cell intra-frequency reselection, and the information required for the terminal to receive further system information (such as the above-mentioned SIB 1, SIB X, etc.). The terminal can determine the location of the control resource of SIB 1 and / or SIB X based on the MIB in the received SSB, and then search for SIB 1 and / or SIB X on the corresponding control resource, where X takes the value of 2, 3, 4...13.

[0119] The format of the time-frequency resources used to transmit SSB will be introduced in detail below in conjunction with Figure 3.

[0120] Figure 3 is a schematic diagram of the format of time-frequency resources for transmitting SSB provided in an embodiment of the present application.

[0121] As shown in Figure 3, the time domain resources used to transmit SSB are 4 orthogonal frequency division multiplexing (OFDM) symbols (in this application, OFDM symbols can be simply referred to as symbols), among which the first OFDM symbol is used to carry PSS, and PSS occupies 127 subcarriers in the frequency domain; the second and fourth OFDM symbols are used to carry PBCH signals, and PBCH signals occupy 240 subcarriers in the frequency domain; the third OFDM symbol is used to carry SSS (SSS occupies 127 subcarriers in the frequency domain) and part of the PBCH signal (the PBCH signals at both ends each occupy 48 subcarriers in the frequency domain).

[0122] 2. Resource Block (RB) and Resource Block Group (RBG): A resource block is also called a physical resource block (PRB). Similarly, a resource block group is also called a physical resource block group. A resource block generally includes N resource elements (REs), each of which is also called a subcarrier. N can be, for example, 12. A resource block group includes one or more resource blocks.

[0123] 3. Reference Signal (RS): This can be used for channel measurement, channel estimation, or beam quality monitoring. Based on their functional classification, reference signals include, but are not limited to, DMRS, channel state information reference signal (CSI-RS), phase tracking reference signal (PTRS), and sounding reference signal (SRS). DMRS and CSI-RS can be used to obtain channel information, while PTRS can be used to obtain phase change information.

[0124] 4. Physical Downlink Control Channel (PDCCH): This channel is used to transmit downlink control information (DCI). For example, the PDCCH can be used to transmit resource allocation, uplink scheduling grants, power control, and uplink retransmission information. In the time domain, the PDCCH occupies the first {1, 2, 3} symbols of a timeslot; in the frequency domain, it can occupy the full bandwidth or be configured via parameters, which is not limited in this application.

[0125] 5. Physical Downlink Shared Channel (PDSCH): refers to the channel used to transmit downlink user data. The resources occupied by the PDSCH in the time domain can be indicated by the time domain resource allocation field in the DCI (such as indicating the first symbol and the number of consecutive symbols), and the resources occupied in the frequency domain are indicated by the frequency domain resource allocation field in the DCI. The frequency domain resources indicated by the frequency domain resource allocation field in the DCI can be based on RBG granularity or RB granularity, which is not limited in this application.

[0126] In the present application, SIB includes first-type signals and second-type signals. The first-type signals are signals transmitted on the PDCCH, and the second-type signals are signals transmitted on the PDSCH.

[0127] 6. Control resource set (CORESET) and search space: A control resource set (CORESET) is a set of physical resources, including multiple RBs in the frequency domain and 1 / 2 / 3 OFDM symbols in the time domain. A CORESET corresponds to one or more terminals. For example, CORESET 1 corresponds to terminal 1, terminal 2, terminal 3, and terminal 4, and CORESET 2 corresponds to terminal 4, terminal 5, terminal 6, and terminal 7. CORESET 1 can be used to transmit signals carried on the PDCCH corresponding to terminal 1, the PDCCH corresponding to terminal 2, the PDCCH corresponding to terminal 3, and the PDCCH corresponding to terminal 4. CORESET 2 can be used to transmit signals carried on the PDCCH corresponding to terminal 4, the PDCCH corresponding to terminal 5, the PDCCH corresponding to terminal 6, and the PDCCH corresponding to terminal 7.

[0128] The search space is an area of ​​a CORESET where a terminal can monitor the search space to detect a specific PDCCH (or DCI). A terminal has one search space on a CORESET, and the resources of the search space are less than or equal to the resources of the CORESET. A terminal can correspond to multiple CORESETs, and the parameter sets (numerology) on these multiple CORESETs can be the same or different. The parameter set includes, for example, the subcarrier spacing and the cyclic prefix (CP) length.

[0129] CORESET 0 is a special CORESET. CORESET 0 is used for parsing SIB 1.

[0130] In the present application, CORESET 0 can be used to indicate the PDCCH time domain resource length, frequency domain resource length and offset, and the multiplexing mode with the SSB; search space 0 is the search space corresponding to CORESET 0, which can be used to determine the system frame number, time slot and OFDM symbol position where the PDCCH may exist. In addition, in the following text, CORESET 0 and PDCCH can be replaced. For example, the system frame number, time slot number, and start symbol corresponding to the first signal (one of multiple first-class signals) can be understood as the system frame number, time slot number and start symbol corresponding to the PDCCH carrying the first signal, or the system frame number, time slot number and start symbol of CORESET 0.

[0131] The following table provides a detailed introduction to the main parameter configurations of the control resource set and search space.

[0132] Table 1

[0133] Table 1 lists the main parameter configurations for the control resource set. A CCE consists of six REGs, each corresponding to one RB in an OFDM symbol. An REG represents the resource corresponding to one symbol in the time domain and one RB in the frequency domain. The resources that a PDCCH may occupy and the resources actually occupied by the PDCCH can be described using CCEs.

[0134] Table 2 shows the main parameter configurations of the search space.

[0135] Table 2

[0136] The network device can schedule the transmission of uplink data and reception of downlink data by the terminal using the DCI carried on the PDCCH. However, the terminal does not know the exact location of the PDCCH carrying the DCI. Therefore, the terminal performs blind detection in the search space within the control resource set. The PDCCH candidate is the location where the PDCCH carrying the DCI may be located. To reduce the number of blind detections by the terminal, the network device can configure these PDCCHs according to predefined rules, and the terminal performs blind detection based on these rules.

[0137] It should be noted that one control resource set can correspond to (or be bound to) multiple search spaces, but one search space can only correspond to one control resource set.

[0138] 7. Initial Access Process: This is a crucial process for a terminal to connect to the network. It primarily includes PSS / SSS detection, decoding of the PBCH and other system information, and the physical random access channel (PRACH) process (referred to as the random access process). The initial access process is described in detail below with reference to Figure 4.

[0139] FIG4 is a flow chart of the initial access process provided in an embodiment of the present application.

[0140] In step 410, the base station transmits the SSB, and the terminal receives the SSB accordingly.

[0141] The SSB is periodically transmitted by the base station. As mentioned above, the SSB includes the PBCH signal, and the MIB carried by the PBCH signal may indicate the scheduling information of SIB 1, such as search space zero and control resource set zero.

[0142] In this application, an SSB indicating SIB 1 is referred to as a cell defining SSB (CD SSB), and an SSB not indicating SIB 1 is referred to as a non-cell defining SSB (NCD SSB).

[0143] After the terminal is turned on or needs to re-access the network, it can scan the SSB from the base station to synchronize the downlink time and frequency. This process can be called cell search.

[0144] In step 420, the base station sends a system information block (such as SIB 1). Correspondingly, the terminal receives the system information block.

[0145] The base station broadcasts a system information block, which can be, for example, SIB 1. SIB 1 carries information required for the random access process, such as the PDCCH resource locations for transmitting message 2 (Msg 2) and message 4 (Msg 4), and can be used by the terminal to complete the random access process.

[0146] In step 430, the terminal performs a random access procedure.

[0147] Exemplarily, the terminal selects an appropriate preamble based on SIB 1 and sends the preamble to the base station (denoted as message 1 (Msg 1)). Accordingly, the base station receives the preamble. After receiving the preamble, the base station sends a random access response (RAR) (denoted as message 2) to the terminal. Message 2 may carry a timing advance (TA) to instruct the terminal to perform uplink synchronization.

[0148] Furthermore, after receiving message 2, the terminal may send an RRC connection establishment request message (RRCSetupRequest) (referred to as message 3) on the uplink resources allocated by message 2. After receiving message 3, the base station sends an RRC connection establishment success message (referred to as message 4).

[0149] 8. DMRS corresponding to PDCCH and DMRS corresponding to PDSCH: In NR, the precoding of PDCCH and PDSCH is relatively independent (for example, the precoding granularity of PDCCH is 6 (in units of REG or RB), and the precoding granularity of PDSCH is 2). Therefore, the DMRS corresponding to PDCCH (denoted as PDCCH DMRS) and the DMRS corresponding to PDSCH (denoted as PDSCH DMRS) are also independently configured to facilitate independent demodulation.

[0150] The precoding granularity may be understood as the number of RBs or REGs used as a group for precoding.

[0151] The network device can configure frequency domain resources for DMRS, namely DMRS type (DMRS type), which can also be called DMRS configuration type. The types of PDCCH DMRS and PDSCH DMRS are described in detail below with reference to FIG5.

[0152] FIG5 is a schematic diagram of a DMRS provided in an embodiment of the present application.

[0153] As shown in a) of FIG5 , the frequency domain density of the PDCCH DMRS is 1 / 4, and starts from RE 1 in the frequency domain. In other words, it starts from the second RE of a REG, that is, the starting RE is the second RE in the REG.

[0154] As shown in b) of Figure 5, for the PDSCH DMRS corresponding to the messages in the downlink broadcast / multicast / initial access process (such as SIB 1, paging message, message 2, message 4, other system information, etc.), its type is mainly DMRS configuration type 1, the frequency domain density is 1 / 2, and the starting RE is RE 0, that is, the starting RE is the first RE in the REG.

[0155] As shown in b) of Figure 5, for downlink messages other than SIB 1 (such as message 2, message 4, paging messages, other system information, or RRC configuration messages, etc.), its PDSCH DMRS can also be configured as DMRS configuration type 2, with the starting RE being RE 0, that is, the starting RE is the first RE in the REG.

[0156] It should be understood that in this application, for ease of description, when referring to indexes or identifiers, they may be numbered consecutively starting from 1. For example, a REG includes 12 REs, and the 12 REs include the 1st to 12th REs. Of course, the specific implementation is not limited to this. For example, the numbering may start consecutively from 0, and in this case, the 12 REs include the 0th to 11th REs.

[0157] 9. Component Carrier (CC): Each carrier participating in carrier aggregation is called a CC. Among all component carriers, the one that carries signaling and manages other component carriers is called a primary component carrier (PCC). The cell corresponding to the primary carrier is called a primary cell (Pcell). Other component carriers are called secondary component carriers (SCCs), and the cells corresponding to secondary carriers are called secondary cells (Scells).

[0158] 10. Multiplexing modes of SSBs and SIBs (taking SIB 1 as an example): including time division multiplexing, frequency division multiplexing, and time division multiplexing and frequency division multiplexing. The multiplexing modes of SSBs and SIB 1 are described in detail below with reference to FIG6 .

[0159] 6 is a schematic diagram of a multiplexing mode of SSB and SIB 1 provided in an embodiment of the present application, wherein SIB 1 includes a first signal carried on the PDCCH and a second signal carried on the PDSCH, and the first signal and the second signal correspond to each other.

[0160] In addition, in FIG6 , the frequency domain resources occupied by SIB 1-PDCCH (PDCCH carrying the first signal) and SIB 1-PDSCH (PDSCH carrying the second signal) are the same.

[0161] As shown in a) of FIG6 , SSB and SIB 1 adopt a time division multiplexing mode, that is, SSB and SIB 1 are transmitted in time division. As a result, other signals such as data signals have fewer time slots for transmission, resulting in poor downlink capacity.

[0162] As shown in b) of Figure 6 , the SSB and the second signal use a frequency division multiplexing multiplexing mode, that is, the SSB and the second signal occupy different frequency domain resources, and the SSB and the second signal occupy the same time slot. As shown in c) of Figure 6 , the SSB and SIB 1 use a frequency division multiplexing multiplexing mode, wherein SIB 1 includes the first signal and the second signal, that is, the SSB and SIB 1 occupy different frequency domain resources, and the SSB and SIB 1 occupy the same time slot.

[0163] The time slot ratios of the SSB and SIB 1 will be described in detail below in conjunction with Figure 7. In this application, SIB 1 includes a first signal and a second signal scheduled by the first signal, which will not be described in detail below.

[0164] Figure 7 is a schematic diagram of the time slot ratios of SSB and SIB 1 provided in an embodiment of the present application.

[0165] As shown in Figure 7, during the initial access process, the SSB period is 20ms. Within this 20ms, the network device can use 8 beams to send SSBs. For example, the SSBs of these 8 beams are identified by SSB#0 to SSB#7, respectively, occupying a total of 4 downlink time slots. After the network device uses the above 8 beams to send SSBs, it can send SIB 1 (such as SIB 1#0 to SIB 1#7 in the figure) after several time slots. SIB 1 occupies a total of 8 downlink time slots. It can be seen that only one SIB 1 is transmitted in one time slot, or in other words, only one first-class signal is transmitted in one time slot, or in other words, only one second-class signal is transmitted in one time slot. Therefore, among the 32 downlink time slots in this 20ms, the time slot proportion of SIB 1 is 8 / 32=25%. The time slot proportion is high (or the time slot proportion of the first-class signal is high, or the time slot proportion of the second-class signal is high), which leads to low downlink capacity.

[0166] To solve the above problems, the present application provides a signal transmission method. After the network device sends multiple SSBs, it can send multiple first-class signals corresponding to the above-mentioned multiple SSBs. These multiple first-class signals are used to schedule multiple second-class signals. These multiple first-class signals occupy the same time slots but different frequency domain resources. That is to say, these multiple first-class signals can adopt a frequency division multiplexing multiplexing mode. In this way, the time slot ratio is reduced, and the time slot originally used to transmit the first-class signal can be used to transmit other signals, which is beneficial to improve the downlink capacity.

[0167] Similarly, the above-mentioned multiple second-type signals occupy the same time slots but different frequency domain resources. In this way, the time slot proportion of the second-type signals can be reduced. The time slots originally used to transmit the second-type signals can be used to transmit other signals, which is beneficial to improving the downlink capacity.

[0168] The signal transmission method provided by the present application will be described in detail below with reference to the accompanying drawings.

[0169] Figure 8 is a schematic flow chart of a signal transmission method 800 provided in an embodiment of the present application. Figure 8 only describes the method by taking the interaction between a network device and a terminal as an example, and should not constitute any limitation to the present application. The network device in Figure 8 can also be replaced by a component configured in the network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the network device. The terminal can be replaced by a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the terminal.

[0170] It should be understood that the method provided in this application is applicable to frequency range (FR) 1 or FR 2, where FR 1 refers to 450 megahertz (MHz) to 6000 MHz and FR 2 refers to 24.25 gigahertz (GHz) to 52.6 GHz. This application does not limit the applicable frequency range.

[0171] The method 800 shown in Figure 8 includes step 810 and step 820. The steps in the method 800 are described in detail below.

[0172] In step 810, the network device sends multiple SSBs.

[0173] The above-mentioned multiple SSBs can be, for example, SSBs sent in one time slot. For example, the number of the above-mentioned multiple SSBs is 2, that is, the network device sends 2 SSBs in one time slot.

[0174] For example, in a RAN deployed with CU, DU and RU, the specific implementation of step 810 may be: the CU-CP sends the above-mentioned multiple SSBs to the terminal through the DU and RU; in the ORAN, the specific implementation of step 810 may be: the O-CU-CP sends the above-mentioned multiple SSBs to the terminal through the O-DU and O-RU.

[0175] It can be understood that the network device sends multiple SSBs, and accordingly, the terminal can receive at least one of the multiple SSBs. Exemplarily, the terminal receives a first SSB, which is one of the multiple SSBs.

[0176] In step 820, the network device sends a plurality of first-type signals, where the plurality of first-type signals occupy the same time slot and different frequency domain resources.

[0177] The multiple first-category signals correspond one-to-one to the multiple SSBs, and the multiple first-category signals are used to schedule multiple second-category signals, and the multiple first-category signals correspond one-to-one to the multiple second-category signals. The first-category signals may be, for example, signals carried on a PDCCH. That is, the multiple first-category signals carried on the PDCCH and used to schedule the multiple second-category signals occupy the same time slots but different frequency domain resources.

[0178] The above-mentioned multiple first-class signals may refer to multiple first-class signals within a time slot, for example, two first-class signals within a time slot, the network device sends two first-class signals in the same time slot, and the two first-class signals occupy different frequency domain resources; similarly, the above-mentioned multiple second-class signals may refer to multiple second-class signals within a time slot, for example, two second-class signals within a time slot, the network device sends two second-class signals in the same time slot, and the two second-class signals occupy different frequency domain resources.

[0179] The second type of signal may refer to a signal carried on the PDSCH, such as a system message. In practical applications, the first type of signal and the second type of signal may be considered as a whole (ie, SIB), and the SIB may be, for example, SIB 1.

[0180] In addition, in the present application, the above-mentioned multiple first-class signals and the above-mentioned multiple second-class signals are one-to-one corresponding, or in other words, when the network device sends a first-class signal, it will send a second-class signal, wherein the first-class signal can be carried on the PDCCH, and the second-class signal can be carried on the PDSCH. In the present application, the time slots occupied by the above-mentioned multiple first-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-class signals are different, that is, the above-mentioned multiple first-class signals can be frequency-division multiplexed. When the above-mentioned multiple first-class signals are frequency-division multiplexed, the above-mentioned multiple second-class signals are also frequency-division multiplexed. In other words, the time slots occupied by the above-mentioned multiple first-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-class signals are different, which can also be replaced by: the time slots occupied by the above-mentioned multiple second-class signals are the same, and the frequency domain resources occupied by the above-mentioned multiple second-class signals are different.

[0181] It can be understood that the signal carried on the above-mentioned PDCCH (that is, the first type of signal) and the signal carried on the PDSCH (that is, the second type of signal) can occupy the same time slot. In this case, the time slots occupied by the above-mentioned multiple first-type signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first-type signals are different. It can also be replaced by the time slots occupied by multiple SIBs being the same, and the frequency domain resources occupied by the above-mentioned multiple SIBs being different.

[0182] It can be understood that the signal carried on the above-mentioned PDCCH (i.e., the first type of signal) and the signal carried on the PDSCH (i.e., SIB) can also occupy different time slots. In other words, the first type of signal and SIB can also cross time slots, and this application does not limit this.

[0183] For example, in a RAN deployed with CU, DU, and RU, the specific implementation of step 820 may be: the CU-CP sends the above-mentioned multiple first-class signals to the terminal through the DU and RU; in the ORAN, the specific implementation of step 820 may be: the O-CU-CP sends the above-mentioned multiple first-class signals to the terminal through the O-DU and O-RU.

[0184] It is understood that the network device sends multiple first-category signals, and accordingly, the terminal can receive at least one of the multiple first-category signals. Exemplarily, the terminal receives a first signal, which is one of the multiple first-category signals.

[0185] It should be noted that in this application, at least two SIBs are included in the same time slot, and the information carried by the SIBs is the same, both of which are related indication information of the same cell. Therefore, after the terminal detects and demodulates the first signal used to schedule the SIB, it can simultaneously obtain two SIBs. Assuming that the SIBs occupy the same time domain and have the same absolute value of the frequency domain offset, the terminal can only demodulate the SIB with a high received signal-to-noise ratio (SNR). In this way, the terminal can quickly demodulate the SIB and avoid consuming extra time to demodulate multiple SIBs carrying the same information.

[0186] Optionally, the multiple first-class signals occupy the same time slots but different frequency domain resources. One possible design is that the multiple first-class signals and the multiple SSBs may occupy the same frequency domain resources. That is, the multiple SSBs and the multiple first-class signals are time-division transmitted, and the multiple first-class signals are frequency-division multiplexed. That is, the multiple first-class signals occupy the same time slots but different frequency domain resources. Exemplarily, after sending the multiple SSBs in the first time slot, the network device sends the multiple first-class signals in the second time slot. The multiple first-class signals occupy different frequency domain resources, wherein the second time slot may be, for example, the next time slot after the first time slot.

[0187] Similarly, the above-mentioned multiple second-class signals and the above-mentioned multiple SSBs can also occupy the same frequency domain resources, that is, the above-mentioned multiple SSBs and the above-mentioned multiple second-class signals are time-division transmitted, and the above-mentioned multiple second-class signals are frequency-division multiplexed, that is, the above-mentioned multiple second-class signals occupy the same time slots and occupy different frequency domain resources, but the multiple second-class signals and the above-mentioned multiple SSBs occupy different time slots and occupy the same frequency domain resources. In this way, a part of the time slots used to transmit the second-class signals can also be saved for transmitting other signals, thereby improving the downlink capacity. Exemplarily, after the network device sends the above-mentioned multiple SSBs in the first time slot, it sends the above-mentioned multiple second-class signals in the second time slot. The frequency domain resources occupied by the multiple second-class signals are different, wherein the second time slot can be, for example, the next time slot of the first time slot.

[0188] The signal carried on the above-mentioned PDCCH (that is, the first type of signal) and the signal carried on the PDSCH (that is, the second type of signal) can occupy the same time slot. In this case, the above-mentioned multiple SIBs and the above-mentioned multiple SSBs can also occupy the same frequency domain resources, that is, the above-mentioned multiple SSBs and the above-mentioned multiple SIBs are time-division transmitted, and the above-mentioned multiple SIBs are frequency-division multiplexed, that is, the above-mentioned multiple SIBs occupy the same time slot and occupy different frequency domain resources, but the multiple SIBs and the above-mentioned multiple SSBs occupy different time slots and occupy the same frequency domain resources.

[0189] Another possible design is that the multiple first-category signals and the multiple SSBs may occupy different frequency domain resources. That is, the multiple SSBs and the multiple first-category signals are frequency-division transmitted. That is, in the same time slot, the network device sends the multiple SSBs and the multiple first-category signals. The multiple first-category signals occupy different frequency domain resources, and the multiple first-category signals and the multiple SSBs occupy different frequency domain resources. Exemplarily, the network device sends the two SSBs in the first time slot and sends two first-category signals in the first time slot. The two first-category signals occupy frequency domain resource #1 and frequency domain resource #2, respectively, and the two SSBs occupy frequency domain resource #3.

[0190] It should be noted that the above-mentioned multiple first-category signals and the above-mentioned multiple second-category signals are one-to-one corresponding. Therefore, the above-mentioned multiple first-category signals and the above-mentioned multiple SSBs can occupy different frequency domain resources, and can also be replaced by: the above-mentioned multiple second-category signals and the above-mentioned multiple SSBs can occupy different frequency domain resources. When the first-category signals and the second-category signals occupy the same time slot, the above-mentioned multiple first-category signals and the above-mentioned multiple SSBs can occupy different frequency domain resources, and can also be replaced by: multiple SIBs and the above-mentioned multiple SSBs can occupy different frequency domain resources. Each SIB includes a first-category signal carried on the PDCCH and a second-category signal carried on the PDSCH.

[0191] The following describes in detail the situation where the above-mentioned multiple first-class signals and the above-mentioned multiple SSBs can occupy different frequency domain resources.

[0192] One possible design is that the multiple first-category signals and the multiple SSBs occupy the same time slot. Taking the first signal and the first SSB as an example, the first signal is one of the multiple first-category signals, the first SSB is the SSB corresponding to the first signal among the multiple SSBs, and the first signal and the first SSB occupy the same time slot, but the first signal and the first SSB occupy different frequency domain resources.

[0193] Figure 9 is a schematic diagram of SIB 1 and SSB multiplexing provided in an embodiment of the present application. In Figure 9, two SIBs (such as SIB 1) are used as an example, and two SSBs are used as an example. In other words, the network device sends two SSBs and two SIB 1s in one time slot. Among them, SIB 1-PDCCH represents a channel used to carry the first type of signal, and SIB 1-PDSCH represents a channel used to carry the second type of signal. SIB 1 includes both the first type of signal and the second type of signal.

[0194] As shown in Figure 9, the network device sends two SSBs in one time slot, and also sends two SIB 1s in the same time slot. For example, the signal carried on the PDCCH in Figure 9 occupies 3 OFDM symbols in the time domain, and the signal carried on the PDSCH occupies 7 OFDM symbols in the time domain. In this way, the two time slots originally used to transmit SIB 1 can be used as data transmission (PDSCH) time slots.

[0195] Another possible design is that the above-mentioned multiple first-category signals and the above-mentioned multiple SSBs occupy different time slots. Taking the first signal and the first SSB as an example, the first signal is one of the above-mentioned multiple first-category signals, the first SSB is the SSB corresponding to the first signal among the above-mentioned multiple SSBs, the first signal and the first SSB occupy different time slots, and the first signal and the first SSB occupy different frequency domain resources. Exemplarily, the network device sends the first SSB in the first time slot, occupying frequency domain resource #1, and sends the first signal corresponding to the first SSB in the second time slot, and the first signal occupies frequency domain resource #2, wherein the first time slot and the second time slot are different time slots.

[0196] Optionally, the offset of the frequency domain resources occupied by the first signal relative to the first frequency domain reference is predefined or indicated by first indication information carried in the first SSB. The first signal is one of the above-mentioned multiple first-category signals, and the first SSB is the SSB corresponding to the first signal in the above-mentioned multiple SSBs.

[0197] That is to say, the offset of the frequency domain resources occupied by the first signal relative to the first frequency domain reference can be predefined or indicated by the network device to the terminal, and this application does not limit this.

[0198] Optionally, the above-mentioned first frequency domain reference may be the frequency domain resources occupied by the first SSB. That is, the frequency domain offset of the first signal may refer to the offset relative to the frequency domain resources occupied by the first SSB. The design of the above-mentioned first frequency domain reference is only an example and should not constitute any limitation to this application. The first frequency domain reference may also adopt other designs. For example, if the first frequency domain reference is 0, the network device may indicate to the terminal the frequency domain offset corresponding to the first signal, and may also indicate the frequency domain offset corresponding to the first SSB. Exemplarily, the first frequency domain reference is 0, the above-mentioned multiple first-category signals include signal #1 and signal #2, and the above-mentioned multiple SSBs include SSB #1 and SSB #2, wherein signal #1 corresponds to SSB #1, signal #2 corresponds to SSB #2, the frequency domain offset corresponding to signal #1 is 1, the frequency domain offset corresponding to SSB #1 and SSB #2 is 97, and the frequency domain offset corresponding to signal #2 is 99, and the unit is RB.

[0199] The following describes in detail the case where the first frequency domain reference is the frequency domain resource occupied by the first SSB.

[0200] One possible design is that the offset of the frequency domain resources occupied by each of the multiple first-category signals relative to the frequency domain resources occupied by the corresponding SSB is a positive number.

[0201] Another possible design is that the offset of the frequency domain resources occupied by each of the multiple first-category signals relative to the frequency domain resources occupied by the corresponding SSB is a negative number.

[0202] Another possible design is that the offset of the frequency domain resources occupied by a part of the above-mentioned multiple first-class signals relative to the frequency domain resources occupied by the corresponding SSB is a positive number, and the offset of the frequency domain resources occupied by another part of the first-class signals relative to the frequency domain resources occupied by the corresponding SSB is a negative number.

[0203] It should be understood that in the present application, the first type of signal and multiple second type of signals are in one-to-one correspondence. Therefore, the above-mentioned multiple second type of signals and the above-mentioned multiple SSBs are in one-to-one correspondence. The offsets of the above-mentioned multiple second type of signals relative to the frequency domain resources occupied by the corresponding SSBs can also adopt the above-mentioned three possible designs, or the offsets of multiple SIBs relative to the frequency domain resources occupied by the corresponding SSBs can also adopt the above-mentioned three possible designs. Each of the above-mentioned multiple SIBs includes a signal carried on the PDCCH and a signal carried on the PDSCH.

[0204] The above possible designs will be explained in detail below with reference to FIG. 10A .

[0205] Figure 10A is another schematic diagram of SIB and SSB multiplexing provided by an embodiment of the present application. In Figure 10A, two SIBs (such as SIB 1) are used as an example, and two SSBs are used as an example. In other words, the network device sends two SSBs and two SIB 1s in one time slot. In Figure 10A, taking one SSB scanning cycle as an example, within this SSB scanning cycle, the network device sends 8 SSBs, which are identified by SSB#0 to SSB#7, respectively, and occupy a total of 4 downlink time slots.

[0206] In FIG10A , SSB#0 corresponds to SIB 1#0, SSB#1 corresponds to SIB 1#1, SSB#2 corresponds to SIB 1#2, SSB#3 corresponds to SIB 1#3, SSB#4 corresponds to SIB 1#4, SSB#5 corresponds to SIB 1#5, SSB#6 corresponds to SIB 1#6, and SSB#7 corresponds to SIB 1#7.

[0207] The frequency domain resources occupied by the SSB can be fixed at 20 RBs, while the frequency domain resources occupied by SIB 1 can be variable, such as {24 RBs, 48 ​​RBs, or 96 RBs}, determined by the "ControlResourceSetZero" field carried by the MIB in the PBCH. The maximum bandwidth allocated to a single CC in the downlink broadcast channel is 273 RBs, so a single frequency slot can transmit up to two 96-RB SIB 1s. In this case, the SIB 1 includes signals carried on the PDCCH and the PDSCH. To maximize frequency domain resource utilization, two SIB 1s can be transmitted in a single slot, for example.

[0208] As shown in a) of Figure 10A , the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot is positive, and the frequency domain offset of SIB 1 corresponding to the second SSB is negative. For example, the frequency domain offsets of SIB 1#0, SIB 1#2, SIB 1#4, and SIB 1#6 are greater than 0; the frequency domain offsets of SIB 1#1, SIB 1#3, SIB 1#5, and SIB 1#7 are less than 0.

[0209] As shown in b) of Figure 10A , the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot is negative, and the frequency domain offset of SIB 1 corresponding to the second SSB is positive. For example, the frequency domain offsets of SIB 1#0, SIB 1#2, SIB 1#4, and SIB 1#6 are less than 0; the frequency domain offsets of SIB 1#1, SIB 1#3, SIB 1#5, and SIB 1#7 are greater than 0.

[0210] As shown in c) of Figure 10A , the frequency domain offset of SIB 1 corresponding to each SSB in the same time slot is either positive or negative. For example, the frequency domain offsets of SIB 1#0, SIB 1#2, SIB 1#4, and SIB 1#6 are greater than 0; and the frequency domain offsets of SIB 1#1, SIB 1#3, SIB 1#5, and SIB 1#7 are greater than 0.

[0211] As shown in d) of Figure 10A, the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot is a positive number, while the frequency domain offset of SIB 1 corresponding to the second SSB is a negative number. The SSB and the corresponding SIB 1 are not in the same time slot and there is a time slot offset. For example, the frequency domain offset of SIB 1#0, SIB 1#2, and SIB 1#4 is greater than 0, and the time slot offset is 1 time slot; the frequency domain offset of SIB 1#1, SIB 1#3, and SIB 1#5 is less than 0, and the time slot offset is 1 time slot; the frequency domain offset of SIB 1#6 is greater than 0, and the time slot offset is one SSB period (e.g., 40 time slots); the frequency domain offset of SIB 1#7 is less than 0, and the time slot offset is 40 time slots.

[0212] It should be understood that in d) of Figure 10A, the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot is a positive number, and the frequency domain offset of SIB 1 corresponding to the second SSB in the same time slot is a negative number. However, this does not constitute any limitation to the present application. For example, the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot may be a negative number, and the frequency domain offset of SIB 1 corresponding to the second SSB in the same time slot may be a positive number; or, the frequency domain offset of SIB 1 corresponding to the first SSB in the same time slot and the frequency domain offset of SIB 1 corresponding to the second SSB in the same time slot may both be positive numbers or both be negative numbers.

[0213] It can be understood that in FIG10A , taking the example of the multiple SIBs and the multiple SSBs occupying different frequency domain resources, as previously mentioned, the multiple SSBs and the multiple SIBs can also be transmitted in time division, and the multiple SIBs are frequency division multiplexed, that is, the multiple SIBs occupy the same time slot but different frequency domain resources. The above scenario will be explained below with reference to FIG10B .

[0214] Figure 10B is another schematic diagram of SIB and SSB multiplexing provided in an embodiment of the present application.

[0215] As shown in Figure 10B, the network device sends SSB#0 and SSB#1 in the first time slot, and sends SIB 1#0 and SIB 1#1 in the next time slot, wherein the frequency domain resources occupied by SIB 1#0 and SIB 1#1 are different, and the frequency domain resources occupied by SIB 1#0 and SSB#0 may be the same or different; the frequency domain resources occupied by SIB 1#1 and SSB#1 may be the same or different, and this application does not limit this. Among them, the frequency domain offset of SIB 1#0 relative to SSB#0 is a positive number, and the frequency domain offset of SIB 1#1 relative to SSB#1 is a negative number. The frequency domain offsets of SIB 1#3 to SIB 1#7 relative to the corresponding SSB are similar to the design of SIB 1#0 and SIB 1#1, and will not be repeated here.

[0216] In addition, more possible designs of the frequency domain offsets of SIB 1#0 to SIB 1#7 relative to the corresponding SSB can be found in FIG10A , which will not be described in detail here.

[0217] It should be understood that FIG10B shows a scenario in which the network device continuously sends two SSBs, but this should not constitute any limitation to the present application. For example, the network device may also continuously send a larger number of SSBs, such as four SSBs, and then send four SIB 1s corresponding to the four SSBs, where two SIB 1s are frequency-division multiplexed and the other two SIB 1s are frequency-division multiplexed. The specific frequency-division multiplexing method can be found in FIG10B and will not be described in detail here.

[0218] Optionally, the first SSB carries second indication information, which indicates that the first SSB and the first signal are frequency division multiplexed, and the above-mentioned frequency division multiplexing is one of multiple multiplexing modes, and the above-mentioned multiple multiplexing modes include time division multiplexing and / or frequency division multiplexing.

[0219] The network device can indicate the multiplexing mode of the first SSB and the first signal to the terminal. For example, FR 1 supports frequency division multiplexing (as shown in a), b), and c of Figure 10A) (referred to as multiplexing mode 1) and time division multiplexing (referred to as multiplexing mode 2), and the network device can indicate the multiplexing mode of the first SSB and the first signal to the terminal.

[0220] It can be understood that the first signal corresponds to the second signal and the first SIB (the first SIB may include the first signal and the second signal), and the second indication information indicates that the first SSB and the first signal are frequency-division multiplexed. It can also be replaced by the second indication information indicating that the first SSB and the second signal are frequency-division multiplexed, or the first SSB and the first SIB are frequency-division multiplexed.

[0221] One possible design is, as shown in Table 3, that the network device indicates the multiplexing mode of the first signal and the first SSB of the terminal through a reserved field (e.g., 1 bit) of the MIB in the PBCH. For example, a value of 0 in the reserved field indicates multiplexing mode 1, and a value of 1 in the reserved field indicates multiplexing mode 2; or a value of 1 in the reserved field indicates multiplexing mode 1, and a value of 0 in the reserved field indicates multiplexing mode 2.

[0222] Table 3

[0223] In addition, the network device and the terminal may pre-agree on the positive or negative frequency domain offset of the first signal relative to the first SSB under multiplexing mode 1. For example, when the index value of the first SSB obtained by the terminal is an even number (such as 0, 2, 4, 6), the offset indicated in the subsequent "ControlResourceSetZero" field is a positive number; when the index value of the first SSB is an odd number (1, 3, 5, 7), the offset indicated in the subsequent "ControlResourceSetZero" field is a negative number. Alternatively, when the index value of the first SSB obtained by the terminal is an even number (such as 0, 2, 4, 6), the offset indicated in the subsequent "ControlResourceSetZero" field is a negative number; when the index value of the first SSB is an odd number (1, 3, 5, 7), the offset indicated in the subsequent "ControlResourceSetZero" field is a positive number. This application does not limit this.

[0224] In another example, the network device and the terminal agree in advance that the offsets indicated in the subsequent "ControlResourceSetZero" field are all positive numbers or all negative numbers.

[0225] It can be understood that when the network device and the terminal agree that the offset indicated in the subsequent "ControlResourceSetZero" field is a negative number, after the terminal obtains the offset, it can take the opposite of the offset, which is the frequency domain offset corresponding to the first signal.

[0226] Another possible design is that the network device directly uses the "ControlResourceSetZero" field to indicate the multiplexing mode of the terminal's first signal and the first SSB. In addition, the "ControlResourceSetZero" field can also indicate the frequency domain offset corresponding to the first signal and the positive and negative frequency domain offset. This design is conducive to improving the flexibility of the multiplexing mode of the first SSB and the first signal. For example, when SIBs with different frequency domain lengths (such as 48RB and 96RB) appear in the same SSB scanning period (5ms), the positive and negative values ​​of the frequency domain offset may switch, which is more flexible to indicate through the "ControlResourceSetZero" field.

[0227] Optionally, the system frame number, time slot number and start symbol of the first signal are predefined or indicated by third indication information in the first SSB.

[0228] In the present application, the system frame number, time slot number, and starting symbol corresponding to the first signal can be understood as the system frame number, time slot number, and starting symbol corresponding to the PDCCH carrying the first signal, or the system frame number, time slot number, and starting symbol of CORESET 0.

[0229] One possible design is that the system frame number, time slot number, and start symbol of the first signal are predefined.

[0230] Another possible design is that the network device indicates the system frame number, time slot number and starting symbol of the first signal to the terminal.

[0231] For example, the network device can indicate the monitoring occasion and the starting symbol position of the first signal through the MIB (such as the "SearchSpaceZero" field). The monitoring occasion includes the system frame number (which can be recorded as SFN). c ) and the time slot number (which can be recorded as n c ), the starting symbol position refers to the first signal in time slot n c The starting OFDM symbol index in .

[0232] The relationship between the system frame number, time slot number and start symbol of the first signal and the system frame number, time slot number and start symbol of the first SSB will be described in detail below.

[0233] One possible design is that the system frame number of the first signal is the same as the system frame number of the first SSB.

[0234] In this case, the time slot number of the first signal is the same as the time slot number of the first SSB, that is, the first signal and the first SSB occupy the same time slot. Alternatively, the time slot number of the first signal = the time slot number of the first SSB + n, that is, the first signal and the first SSB occupy different time slots, and the time slot code of the first signal is the sum of the time slot code of the first SSB and n.

[0235] Here, n is a positive integer, and n≤the number of time slots included in one system frame-1, that is, n is less than or equal to the difference between the number of time slots included in one system frame and 1.

[0236] The time slot number of the first signal = the time slot number of the first SSB + n is only an example and should not constitute any limitation to this application. Simple transformations of the above formula should also fall within the scope of protection of this application. For example, the time slot number of the first signal = the time slot number of the first SSB - n.

[0237] In one example, as shown in a), b), and c) of FIG. 10A , the system frame number of the first signal is the same as the system frame number of the first SSB, and the time slot number of the first signal is the same as the time slot number of the first SSB.

[0238] Another example, as shown in d) in Figure 10A, when the index value of SSB is 0, 1, 2, 3, 4, or 5, the system frame number of the first signal corresponding to SSB is the same as the system frame number of SSB, but the time slot number of the first signal = the time slot number of SSB + 1.

[0239] Another possible design is that the system frame number of the first signal = the system frame number of the first SSB + m, where m is the number of system frames included in one period of the first SSB. In other words, the first signal and the first SSB occupy different time slots, and the system frame number of the first signal is the sum of the system frame number of the first SSB and m.

[0240] For example, assuming that one SSB period is 20 ms, then m = 2. As shown in d) of FIG10A , when the SSB index value is 6 or 7, the system frame number of the first signal corresponding to the SSB = the system frame number of the SSB + 2.

[0241] When the system frame number of the first signal = the system frame number of the first SSB + m, the time slot number of the first signal = the time slot number corresponding to the first SSB in the next SSB cycle.

[0242] Exemplarily, as shown in d) in FIG10A , when the index value of the SSB is 6 or 7, the time slot number of the first signal corresponding to the SSB is equal to the time slot number corresponding to the first SSB in the next SSB cycle.

[0243] Regarding the starting symbol of the first signal, one possible design is that the starting symbol of the first signal is fixed and has nothing to do with the starting symbol of the first SSB. For example, the starting symbol index of the first signal is 0. In this way, the starting symbol of the first signal is fixed, which helps reduce signaling overhead. In this case, the starting symbol of the first signal can be different from the starting symbol of the first SSB.

[0244] Another possible design is that the starting symbol of the first signal is related to the starting symbol of the first SSB. For example, the starting symbol of the first signal is the same as the starting symbol of the first SSB. The following first briefly describes a possible design of the starting symbol of the first SSB.

[0245] Figure 11 is a schematic diagram of the starting symbol of the first SSB provided in an embodiment of the present application.

[0246] As shown in Figure 11, one possible scenario (denoted as scenario A) is that the starting symbol index in time slots 0 and 2 is 4, and the starting symbol index in time slots 1 and 3 is 2. Another possible scenario (denoted as scenario B) is that the starting symbol index in time slots 0 to 3 is all 2.

[0247] When the starting symbol of the first SSB is case C, the starting symbol index of the first signal is 2. When the starting symbol of the first SSB is case B, the starting symbol of the first signal satisfies the following design:

[0248] When the first SSB and the first signal occupy the same time slot (as shown in a), b), and c of Figure 10A), when the index of the first SSB is 0, 1, 4, or 5, the starting symbol index of the first signal is 4; when the index value of the first SSB is 2, 3, 6, or 7, the starting symbol index of the first signal is 2; in other words, when the index value of the first SSB is {i=4k, i=4k+1, i=4k+2, i=4k+3} (k=0, 1), the starting symbol index of the first signal is {4, 4, 2, 2}.

[0249] The first SSB and the first signal occupy different time slots. When the time slot offset is 1 (as shown in d in Figure 10A), when the index value of the first SSB is 0, 1, 4, 5, the starting symbol index of the first signal is 2; when the index value of the first SSB is 2, 3, 6, 7, the starting symbol index of the first signal is 4. In other words, when the index value of the first SSB is {i=4k, i=4k+1, i=4k+2, i=4k+3} (k=0, 1), the starting symbol index of the first signal is {2, 2, 4, 4}.

[0250] In the present application, the relationship between the system frame number, time slot number, and start symbol of the first signal and the system frame number, time slot number, and start symbol of the first SSB is shown in a formula as an example, but this should not constitute any limitation to the present application. For example, a table, array, queue, container, stack, linear list, pointer, linked list, tree, graph, structure, class, heap, hash table, or hash table may also be used. For example, Table 4 shows the relationship between the system frame number, time slot number, and start symbol of the first signal and the system frame number, time slot number, and start symbol of the first SSB.

[0251] Table 4 shows the possible designs of the monitoring opportunities and starting symbols of the first signal. SSB,i Indicates the system frame number of the first SSB corresponding to the first signal, n SSB,i Indicates the time slot number of the first SSB. SSB,j Indicates the time slot number of the first SSB of the next SSB cycle.

[0252] Table 4

[0253] The DMRS corresponding to the first signal and the DMRS corresponding to the second signal will be described in detail below with reference to FIG. 12 .

[0254] FIG12 is a schematic diagram of a DMRS according to an embodiment of the present application, wherein FIG12 a) is an existing DMRS design, and FIG12 b), FIG12 c), and FIG12 d) are DMRS designs proposed in the present application.

[0255] As shown in a) of Figure 12, the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are designed separately, and their antenna port numbers are inconsistent. The port number of the DMRS corresponding to the first signal is 2000, and the port number of the DMRS corresponding to the second signal is 1000, resulting in an imbalance between DMRS resource overhead and channel estimation performance benefits. Therefore, in this application, the following three possible designs are proposed:

[0256] As shown in b) in Figure 12, in a first possible design, the demodulation reference signal DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the second signal is the second DMRS, the port numbers of the first DMRS and the second DMRS are the same, and the precoding granularity of the first DMRS and the second DMRS is the same, the first signal is one of the above-mentioned multiple first-category signals, and the second signal is the second-category signal corresponding to the first signal among the above-mentioned multiple second-category signals.

[0257] As shown in c) in Figure 12, in a second possible design, the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS, the time domain resources occupied by the DMRS include the first symbol and the second symbol, the frequency domain resources occupied by the DMRS on the first symbol and the second symbol are the same, the first signal is one of the above-mentioned multiple first-type signals, and the second signal is a second-type signal corresponding to the first signal among the above-mentioned multiple second-type signals.

[0258] As shown in d) in Figure 12, in a third possible design, the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS, the time domain resources occupied by the DMRS include the first symbol and the second symbol, and the frequency domain resources occupied by the DMRS on the first symbol and the second symbol are different.

[0259] Among them, the DMRS corresponding to the above-mentioned first signal can be replaced with the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal can be replaced with the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as the DMRS that can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as the DMRS that can be used to demodulate the PDSCH.

[0260] It can be understood that NR supports up to 4 CCs (such as CC#0 to CC#3) for carrier aggregation. In one possible implementation, only one CC performs SIB 1 and SSB frequency division multiplexing (or SIB 1 and SSB frequency division multiplexing, or the signal scheduling SIB 1 and SSB frequency division multiplexing) every 20ms, and the remaining CCs do not send SIB 1 and traverse CC#0 to CC#3 within 80ms.

[0261] FIG13a and FIG13b are schematic diagrams of component carrier switching for frequency division multiplexing provided in an embodiment of the present application.

[0262] As shown in Figure 13a, CC#0 performs frequency division within the first 20 ms; CC#1 performs frequency division within the second 20 ms; as shown in Figure 13b, CC#2 performs frequency division within the third 20 ms, and CC#3 performs frequency division within the fourth 20 ms. This facilitates flexible control of the SIB 1 period of each cell, ensuring that only one cell performs frequency division multiplexing at any given moment. Other cells do not send SIB 1, which helps reduce the time slot proportion of SIB 1.

[0263] Based on the above technical solution, after a network device transmits multiple SSBs, it can then transmit multiple Class 1 signals corresponding to the multiple SSBs. These multiple Class 1 signals are used to schedule multiple Class 2 signals. These multiple Class 1 signals occupy the same time slots but different frequency domain resources. In other words, these multiple Class 1 signals can be frequency-division multiplexed. This reduces the time slot usage, allowing the time slots originally used to transmit Class 1 signals to be used to transmit other signals, thereby improving downlink capacity. Furthermore, the fact that the multiple Class 1 signals occupy different frequency domain resources also helps improve frequency domain resource utilization.

[0264] The signal transmission method provided by the embodiment of the present application is described in detail above with reference to the accompanying drawings. Below, the device provided by the embodiment of the present application is described in detail with reference to the accompanying drawings.

[0265] It should be understood that the devices shown in Figures 14 and 15 can be used to implement the functions of the network device or terminal in the above-mentioned method embodiment, and therefore can also achieve the beneficial effects possessed by the above-mentioned method embodiment. In the embodiment of the present application, the device can be the network device in the method embodiment shown in Figure 8, or it can be a component configured in the network device (such as a chip, a chip system, a processor, etc.), or it can be a logic module or software that can implement some or all of the functions of the network device; or, the device can be the terminal in the method embodiment shown in Figure 8, or it can be a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or it can be a logic module or software that can implement some or all of the functions of the terminal.

[0266] FIG14 is a schematic block diagram of a communication device 1400 provided in an embodiment of the present application.

[0267] As shown in Figure 14, the apparatus 1400 includes a first transceiver module 1410 and a second transceiver module 1420. The apparatus 1400 can be used to implement the functions of the network device or terminal in the method embodiment shown in Figure 8 above.

[0268] When the device 1400 is used to implement the function of the network device in the method embodiment shown in Figure 8, the first transceiver module 1410 is used to send multiple SSBs; the second transceiver module 1420 is used to send multiple first-class signals, the multiple first-class signals correspond one-to-one to the multiple SSBs, the multiple first-class signals are used to schedule multiple second-class signals, the multiple first-class signals correspond one-to-one to the multiple second-class signals, the multiple first-class signals occupy the same time slots, and the multiple first-class signals occupy different frequency domain resources.

[0269] When the device 1400 is used to implement the function of the terminal in the method embodiment shown in Figure 8, the first transceiver module 1410 is used to receive a first SSB, which is one of multiple SSBs; the second transceiver module 1420 is used to receive a first signal, which is one of multiple first-class signals, and the multiple first-class signals correspond one-to-one to the multiple SSBs. The multiple first-class signals are used to schedule multiple second-class signals, and the multiple first-class signals correspond one-to-one to the multiple second-class signals. The multiple first-class signals occupy the same time slots, and the multiple first-class signals occupy different frequency domain resources.

[0270] Optionally, the first signal and the first SSB occupy different frequency domain resources. The first signal is one of the multiple first-category signals, and the first SSB is the SSB corresponding to the first signal among the multiple SSBs.

[0271] Optionally, the above-mentioned first signal and the above-mentioned first SSB occupy the same time slot or different time slots.

[0272] Optionally, the frequency domain offset corresponding to the first signal is predefined or indicated by first indication information carried in the first SSB, wherein the frequency domain offset corresponding to the first signal is the offset of the frequency domain resources occupied by the first signal relative to the first frequency domain reference.

[0273] Optionally, the above-mentioned first frequency domain reference can be the frequency domain resources occupied by the first SSB.

[0274] Optionally, the first SSB carries second indication information, which indicates that the first SSB and the first signal are frequency division multiplexed, and the above-mentioned frequency division multiplexing is one of multiple multiplexing modes, and the above-mentioned multiple multiplexing modes include time division multiplexing and / or frequency division multiplexing.

[0275] Optionally, the system frame number, time slot number and start symbol of the first signal are predefined or indicated by third indication information in the first SSB.

[0276] Optionally, the system frame number of the first signal is the same as the system frame number of the first SSB.

[0277] Optionally, the time slot number of the first signal is the same as the time slot number of the first SSB, or the time slot number of the first signal = the time slot number of the first SSB + n, where n is a positive integer and n≤the number of time slots included in a system frame - 1.

[0278] Optionally, the system frame number of the first signal = the system frame number of the first SSB + m, where m is the number of system frames included in one SSB period.

[0279] Optionally, the time slot number of the first signal = the time slot number corresponding to the first SSB in the next SSB cycle.

[0280] Optionally, the DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the second signal is the second DMRS, the port numbers of the first DMRS and the second DMRS are the same, and the precoding granularity of the first DMRS and the second DMRS is the same, the first signal is one of the above-mentioned multiple first-category signals, and the second signal is the second-category signal corresponding to the first signal among the above-mentioned multiple first-category signals.

[0281] Optionally, the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS, the time domain resources occupied by the DMRS include the first symbol and the second symbol, the frequency domain resources occupied by the DMRS on the first symbol and the second symbol are the same or different, the first signal is one of the above-mentioned multiple first-type signals, and the second signal is the second-type signal corresponding to the first signal among the above-mentioned multiple second-type signals.

[0282] A more detailed description of each of the above modules can be directly obtained by referring to the relevant description in the method embodiment shown in Figure 8, and will not be repeated here.

[0283] It should be understood that the division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically as separate modules, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0284] FIG15 is another schematic block diagram of a communication device 1500 provided in an embodiment of the present application.

[0285] The apparatus 1500 may be a chip system, or may be a device configured with a chip system for implementing the method described in the above method embodiment. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0286] As shown in FIG15 , the apparatus 1500 may include a processor 1510 , which may be configured to execute computer programs or instructions in a memory to implement the steps performed by the network device or the steps performed by the terminal in the method embodiment shown in FIG8 .

[0287] Optionally, the apparatus 1500 further includes a communication interface 1520. The communication interface 1520 can be used to communicate with other devices via a transmission medium, thereby enabling the apparatus 1500 to communicate with other devices. The communication interface 1520 can be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of performing transceiver functions. The processor 1510 can utilize the communication interface 1520 to input and output data and implement the method described in the embodiment corresponding to FIG. 8 . Specifically, the apparatus 1500 can be used to implement the functions of a network device or terminal in the aforementioned method embodiments.

[0288] Optionally, the device 1500 further includes at least one memory 1530 for storing program instructions and / or data. The memory 1530 is coupled to the processor 1510. Coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, and is used for information exchange between devices, units, or modules. The processor 1510 may operate in conjunction with the memory 1530. The processor 1510 may execute program instructions stored in the memory 1530. At least one of the at least one memory may be included in the processor.

[0289] It should be understood that the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 1510 may operate in conjunction with the memory 1530. The specific connection medium between the above-mentioned processor 1510, communication interface 1520 and memory 1530 is not limited in the embodiments of the present application. In Figure 15, the embodiment of the present application shows that the processor 1510, communication interface 1520 and memory 1530 are connected via a bus 1540. The bus 1540 is represented by a bold line in Figure 15, and the connection methods between other components are only for schematic illustration and are not limiting. The bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one bold line is used in Figure 15, but this does not mean that there is only one bus or one type of bus.

[0290] FIG16 is a schematic structural diagram of a communication device 1600 provided in an embodiment of the present application.

[0291] The communication device 1600 can be, for example, a network device or a terminal. The device 1600 can be used to implement the method performed by the network device or terminal in the embodiment shown in FIG8 . The device 1600 logically includes multiple components, such as a processor 1610, a memory 1620, and a signal transceiver unit 1630, for implementing communication and signaling interactions with network devices and terminals. The memory 1620 stores computer programs or instructions. When the device 1600 executes the computer programs or instructions, the method shown in FIG8 can be implemented. The signal transceiver unit 1630 includes a transmitter 1631, a receiver 1632, and an antenna 1633. For example, when the communication device 1600 is a network device, the receiver 1632 can be used to receive information via the antenna 1633, and the transmitter 1631 can be used to send information via the antenna 1633.

[0292] FIG17 is another structural diagram of a communication device 1700 provided in an embodiment of the present application.

[0293] The communication device 1700 can be, for example, a terminal or a network device. The device 1700 can be used to implement the method described in the embodiment shown in FIG8 . The device 1700 logically includes multiple components, such as a processor 1701, a memory 1702, and a signal transceiver unit 1703. The memory 1702 can be used to store computer programs (also referred to as code or instructions). The signal transceiver unit 1703 is used to implement communication and signaling exchange between the network device and the terminal, as well as signal amplification. The signal transceiver unit 1703 includes a transmitter 1703a, a receiver 1703b, and an antenna 1703c. In antenna 1703c, each box represents a digital channel, F in the box represents the digital precoding weight, and a phase shifter (circle with an oblique arrow) represents an analog channel, connecting one or multiple arrays. In practice, one phase shifter can control multiple arrays, or the phase shifter can be cross-connected to the arrays.

[0294] The present application also provides a computer program product, which includes: a computer program (also referred to as code, or instructions). When the computer program is executed, it can implement the steps performed by the network device or the steps performed by the terminal in the method described in the embodiment shown in Figure 8.

[0295] The present application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is executed, the steps performed by the network device or the steps performed by the terminal in the method described in the embodiment shown in FIG8 can be implemented.

[0296] An embodiment of the present application provides a communication system, which includes the network device and terminal as described above.

[0297] It should be understood that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above-mentioned method embodiment can be completed by hardware integrated logic circuits in the processor or by software instructions. The above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above-mentioned method.

[0298] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0299] The terms "unit", "module", etc. used in this specification can be used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. The terms "unit" and "module" in the embodiments of this application have the same meaning and can be used interchangeably.

[0300] Those skilled in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. In the several embodiments provided in this application, it should be understood that the disclosed devices, equipment, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, and can be electrical, mechanical, or other forms.

[0301] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0302] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0303] In the above embodiments, the functions of each functional unit 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 instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer 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 instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. 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 that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0304] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the technology or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0305] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A signal transmission method, characterized in that, Including: Sending multiple Synchronization Signal Blocks (SSBs); Sending multiple first - type signals, where the multiple first - type signals correspond one - to - one with the multiple SSBs, the multiple first - type signals are used to schedule multiple second - type signals, the multiple first - type signals correspond one - to - one with the multiple second - type signals, the multiple first - type signals occupy the same time slot, and the multiple first - type signals occupy different frequency - domain resources.

2. The method according to claim 1, wherein The frequency - domain resources occupied by the first signal and the first SSB are different. The first signal is one of the multiple first - type signals, and the first SSB is the SSB corresponding to the first signal among the multiple SSBs.

3. The method according to claim 2, characterized in that The first signal and the first SSB occupy the same time slot or different time slots.

4. The method according to claim 2 or 3, characterized in that, The offset of the frequency - domain resources occupied by the first signal relative to the first frequency - domain reference is predefined or indicated by the first indication information carried in the first SSB.

5. The method according to claim 4, characterized in that, The first frequency - domain reference is the frequency - domain resources occupied by the first SSB.

6. The method according to any one of claims 2 to 5, characterized in that, The first SSB carries second indication information, which indicates that the first SSB and the first signal are frequency - division multiplexed. The frequency - division multiplexing is one of multiple multiplexing modes, and the multiple multiplexing modes include time - division multiplexing and / or frequency - division multiplexing.

7. The method according to any one of claims 2 to 6, characterized in that, The system frame number, time - slot number, and starting symbol of the first signal are predefined or indicated by the third indication information in the first SSB.

8. The method according to claim 7, wherein The system frame number of the first signal is the same as the system frame number of the first SSB.

9. The method according to claim 8, wherein The time - slot number of the first signal is the same as the time - slot number of the first SSB, or the time - slot number of the first signal = the time - slot number of the first SSB + n, where n is a positive integer and n ≤ the number of time slots included in one system frame - 1.

10. The method according to claim 7, wherein The system frame number of the first signal = the system frame number of the first SSB + m, where m is the number of system frames included in one SSB period.

11. The method according to claim 10, characterized in that, The time - slot number of the first signal = the time - slot number corresponding to the first SSB in the next SSB period.

12. The method according to any one of claims 1 to 11, characterized in that, The Demodulation Reference Signal (DMRS) corresponding to the first signal is the first DMRS, and the DMRS corresponding to the second signal is the second DMRS. The port numbers of the first DMRS and the second DMRS are the same, and the precoding granularities of the first DMRS and the second DMRS are the same. The first signal is one of the multiple first - type signals, and the second signal is the second - type signal scheduled by the first signal among the multiple second - type signals.

13. The method according to any one of claims 1 to 11, characterized in that, The DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS. The time - domain resources occupied by the DMRS include the first symbol and the second symbol. The frequency - domain resources occupied by the DMRS on the first symbol and the second symbol are the same or different. The first signal is one of the multiple first - type signals, and the second signal is the second - type signal scheduled by the first signal among the multiple second - type signals.

14. A signal transmission method, characterized in that, Including: Receiving a first Synchronization Signal Block (SSB), where the first SSB is one of the multiple SSBs; Receive a first signal, where the first signal is one of a plurality of first-type signals, the plurality of first-type signals correspond one-to-one to the plurality of SSBs, the plurality of first-type signals are used to schedule a plurality of second-type signals, the plurality of first-type signals correspond one-to-one to the plurality of second-type signals, the plurality of first-type signals occupy the same time slots, and the plurality of first-type signals occupy different frequency-domain resources.

15. The method according to claim 14, wherein The first signal and the first SSB occupy different frequency-domain resources.

16. The method according to claim 15, characterized in that, The first signal and the first SSB occupy the same time slot or different time slots.

17. The method according to claim 15 or 16, characterized in that, The offset of the frequency-domain resources occupied by the first signal relative to a first frequency-domain reference is predefined or indicated by first indication information carried in the first SSB.

18. The method according to claim 17, wherein The first frequency-domain reference is the frequency-domain resources occupied by the first SSB.

19. The method according to any one of claims 15 to 18, characterized in that, The first SSB carries second indication information, where the second indication information indicates that the first SSB and the first signal are frequency-division multiplexed, and the frequency-division multiplexing is one of multiple multiplexing modes, and the multiple multiplexing modes include time-division multiplexing and / or frequency-division multiplexing.

20. The method according to any one of claims 15 to 19, characterized in that, The system frame number, time slot number, and start symbol of the first signal are predefined or indicated by third indication information in the first SSB.

21. The method according to claim 20, characterized in that, The system frame number of the first signal is the same as the system frame number of the first SSB.

22. The method according to claim 21, wherein The time slot number of the first signal is the same as the time slot number of the first SSB, or, the time slot number of the first signal = the time slot number of the first SSB + n, where n is a positive integer and n ≤ the number of time slots included in one system frame - 1.

23. The method according to claim 20, wherein The system frame number of the first signal = the system frame number of the first SSB + m, where m is the number of system frames included in one SSB period.

24. The method according to claim 23, wherein, The time slot number of the first signal = the time slot number corresponding to the first SSB in the next SSB period.

25. The method according to any one of claims 14 to 24, characterized in that, The demodulation reference signal DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the second signal is the second DMRS, the port numbers of the first DMRS and the second DMRS are the same, and the precoding granularity of the first DMRS and the second DMRS is the same. The second signal is the second-type signal scheduled by the first signal among the plurality of second-type signals.

26. The method according to any one of claims 14 to 24, characterized in that The DMRS corresponding to the first signal and the DMRS corresponding to the second signal are the same DMRS. The time-domain resources occupied by the DMRS include a first symbol and a second symbol. The frequency-domain resources occupied by the DMRS on the first symbol and the second symbol are the same or different. The second signal is the second-type signal scheduled by the first signal among the plurality of second-type signals.

27. A communication device, characterized in that, It includes a module for implementing the method according to any one of claims 1 to 13, or includes a module for implementing the method according to any one of claims 14 to 26.

28. A communication device, characterized in that, It includes a processor and a memory, where The memory is used to store a computer program; The processor is used to call the computer program so that the device implements the method according to any one of claims 1 to 13, or implements the method according to any one of claims 14 to 26.

29. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a computer, implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 26.

30. A computer program product, characterized in that, The computer program product includes instructions, which, when run by a computer, implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 26.

Images