Signal transmission method and related device

Abstract

The invention provides a signal transmission method and a related device. The method comprises the following steps: sending a plurality of SSBs; a plurality of first-class signals are sent, the plurality of first-class signals are in one-to-one correspondence with the plurality of SSBs, the plurality of first-class signals are used for scheduling a plurality of second-class signals, the plurality of first-class signals are in one-to-one correspondence with the plurality of second-class signals, time slots occupied by the plurality of first-class signals are the same, frequency domain resources occupied by the plurality of first-class signals are different, and frequency domain resources occupied by the plurality of first-class signals are different. In this way, the time slot ratio of the first type of signals is reduced, the time slot originally used for transmitting the first type of signals can be used for transmitting other signals, and therefore the downlink capacity can be improved. Similarly, the plurality of second-class signals occupy the same time slot and occupy different frequency domain resources, so that the time slot ratio of the second-class signals can be reduced, the time slot originally used for transmitting the second-class signals can be used for transmitting other signals, and the downlink capacity can be improved.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a signal transmission method and related devices. Background Art

[0002] The synchronization signal / physical broadcast channel block (SS / PBCH) (which can be abbreviated as SSB for short) is the basis for cell search. The synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The PSS / SSS and the physical broadcast channel (PBCH) signal together are called SSB. Among them, the master information block (MIB) is transmitted on the PBCH, and the MIB is used to carry 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.

[0003] Currently, the time slot occupancy 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 (PDCCH) and a second type of signal carried on the physical downlink shared channel (PDSCH). Exemplarily, in the initial access process, the period of the SSB is 20 ms. Within these 20 ms, the network device can send the SSB using 8 beams. After the network device sends the SSB using the above 8 beams, after several time slots, SIB 1 can be sent, occupying a total of 8 downlink time slots. Therefore, within these 20 ms, the time slot occupancy ratio of SIB 1 is relatively high, resulting in a relatively low downlink capacity. Summary of the Invention

[0004] This application provides a signal transmission method and related devices, aiming to improve the downlink capacity.

[0005] In a 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 a network device (such as a chip, a chip system, etc.), or can also be a logic module or software capable of implementing all or part of the functions of a network device. The present application does not limit this.

[0006] Exemplarily, the method includes: transmitting multiple SSBs; transmitting multiple first-type signals, where the multiple first-type signals correspond one-to-one to 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 to 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.

[0007] Among them, the above first-type signal can refer to the signal carried on the PDCCH, and the above second-type signal can refer to the signal carried on the PDSCH, such as a system message. In practical applications, the first-type signal and the second-type signal can usually be regarded as a whole (i.e., SIB), and the above SIB can be, for example, SIB 1.

[0008] The above multiple first-type signals can refer to multiple first-type signals within one time slot. For example, two first-type signals within one time slot; similarly, the above multiple second-type signals can refer to multiple second-type signals within one time slot. For example, two second-type signals within one time slot.

[0009] In addition, in the present application, the above multiple first-type signals and the above multiple second-type signals are in one-to-one correspondence. Or rather, when the network device transmits a first-type signal, it will transmit a second-type signal. Among them, the first-type signal can be carried on the PDCCH, and the second-type signal can be carried on the PDSCH. In the present application, the above multiple first-type signals occupy the same time slot, and the above multiple first-type signals occupy different frequency domain resources. That is to say, the above multiple first-type signals can be frequency division multiplexed. When the above multiple first-type signals are frequency division multiplexed, the above multiple second-type signals are also frequency division multiplexed. In other words, the above multiple first-type signals occupy the same time slot, and the above multiple first-type signals occupy different frequency domain resources can also be replaced with: the above multiple second-type signals occupy the same time slot, and the above multiple second-type signals occupy different frequency domain resources.

[0010] It can be understood that the signals carried on the above-mentioned PDCCH (i.e., the first type of signals) and the signals carried on the PDSCH (i.e., the second type of signals) can occupy the same time slot. In this case, the time slots occupied by the above-mentioned multiple first type of signals are the same, and the frequency domain resources occupied by the above-mentioned multiple first type of signals are different. It can also be replaced with: the time slots occupied by multiple SIBs are the same (SIBs include the first type of signals and the second type of 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 one time slot. For example, two SIBs within one time slot.

[0011] The signals carried on the above-mentioned PDCCH (i.e., the first type of signals) and the signals carried on the PDSCH (i.e., the second type of signals) can also occupy different time slots. In other words, the first type of signals and the second type of signals can also be across time slots, and the present application does not limit this.

[0012] In the above technical solution, after the network device sends multiple SSBs, it can send multiple first type of signals corresponding to the multiple SSBs. These multiple first type of signals are used to schedule multiple second type of signals. The time slots occupied by these multiple first type of signals are the same, and the frequency domain resources occupied are different. That is to say, these multiple first type of signals can be frequency division multiplexed. In this way, the time slot occupancy ratio can be reduced, and the time slots originally used to transmit the first type of signals can be used to transmit other signals, which is conducive to improving the downlink capacity. In addition, within the same time slot, transmitting the above-mentioned multiple first type of 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 with transmitting one first type of signal within one time slot. Similarly, the time slots occupied by the above-mentioned multiple second type of signals are the same, and the frequency domain resources occupied are different. In this way, the time slot occupancy ratio of the second type of signals can be reduced, and the time slots originally used to transmit the second type of signals can be used to transmit other signals, which is conducive to improving the downlink capacity.

[0013] In a second aspect, the present application provides a signal transmission method. This method 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, a chip system, etc.), or can also be a logic module or software capable of implementing all or part of the terminal functions. The present application does not limit this.

[0014] Exemplarily, the method includes: receiving a first SSB, where the first SSB is one of a plurality of SSBs; receiving 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 with 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 with the plurality of second-type signals, the time slots occupied by the plurality of first-type signals are the same, and the frequency-domain resources occupied by the plurality of first-type signals are different. For the relevant descriptions of the first-type signals and the second-type signals, reference can be made to the first aspect, which will not be elaborated here.

[0015] In the above technical solution, the plurality of first-type signals used to schedule the plurality of second-type signals occupy the same time slots and different frequency-domain resources. That is to say, these plurality of first-type signals can be frequency-division multiplexed. In this way, the time-slot ratio is reduced, and the time slots originally used to transmit the first-type signals can be used to transmit other signals, which is conducive to improving the downlink capacity. In addition, within the same time slot, transmitting the plurality of first-type 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 with transmitting one first-type signal in one time slot. Similarly, the plurality of second-type signals occupy the same time slots and different frequency-domain resources. In this way, the time-slot ratio of the second-type signals can be reduced, and the time slots originally used to transmit the second-type signals can be used to transmit other signals, which is conducive to improving the downlink capacity.

[0016] Combining the first aspect and the second aspect, in some possible implementation manners, the first signal and the first SSB occupy different frequency-domain resources. The first signal is one of the plurality of first-type signals, and the first SSB is the SSB corresponding to the first signal among the plurality of SSBs.

[0017] As previously mentioned, the plurality of first-type signals and the plurality of second-type signals are in one-to-one correspondence. Therefore, the fact that the first signal and the first SSB occupy different frequency-domain resources can also be replaced with: the second signal and the first SSB occupy different frequency-domain resources, where the second signal is the second-type signal corresponding to the first SSB among the plurality of second-type signals; or, the first SIB and the first SSB occupy different frequency-domain resources, where the first SIB is the SIB corresponding to the first SSB among the plurality of SIBs.

[0018] Taking the first SSB among the plurality of SSBs as an example, the first SSB and the first signal corresponding to the first SSB occupy different frequency-domain resources. That is to say, the first signal and the first SSB are frequency-division multiplexed. In this way, the time slots 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.

[0019] It should be noted that in this application, the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs may also occupy the same frequency-domain resources. That is to say, the above-mentioned multiple SSBs and the above-mentioned multiple first-type signals are transmitted in a time-division manner, and the above-mentioned multiple first-type signals are frequency-division multiplexed. That is, the above-mentioned multiple first-type signals occupy the same time slot and different frequency-domain resources, but these multiple first-type 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 for transmitting the first-type signals can also be saved for transmitting other signals, thereby improving the downlink capacity. Exemplarily, after the network device transmits the above-mentioned multiple SSBs in the first time slot, it transmits the above-mentioned multiple first-type signals in the second time slot, and the multiple first-type signals occupy different frequency-domain resources, where the second time slot can be, for example, the next time slot after the first time slot.

[0020] Similarly, the above-mentioned multiple second-type signals and the above-mentioned multiple SSBs may also occupy the same frequency-domain resources. That is to say, the above-mentioned multiple SSBs and the above-mentioned multiple second-type signals are transmitted in a time-division manner, and the above-mentioned multiple second-type signals are frequency-division multiplexed. That is, the above-mentioned multiple second-type signals occupy the same time slot and different frequency-domain resources, but these multiple second-type 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 for transmitting the second-type signals can also be saved for transmitting other signals, thereby improving the downlink capacity. Exemplarily, after the network device transmits the above-mentioned multiple SSBs in the first time slot, it transmits the above-mentioned multiple second-type signals in the second time slot, and the multiple second-type signals occupy different frequency-domain resources, where the second time slot can be, for example, the next time slot after the first time slot.

[0021] Combining the first aspect and the second aspect, in some possible implementation manners, the above-mentioned first signal and the above-mentioned first SSB occupy the same time slot or different time slots.

[0022] In this application, the first signal, the second signal, and the first SIB are in one-to-one correspondence. Among them, the first SIB includes the first signal and the second signal. 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. Therefore, in the following description, the first signal and the first SSB occupying the same time slot or different time slots can be replaced with: the first SIB and the first SSB occupying the same time slot or different time slots; or, the second signal and the first SSB occupying the same time slot or different time slots.

[0023] 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 can occupy the same time slot, that is to say, the time slot where the first signal is located is the same as the time slot where the first SSB is located. The first signal and the first SSB corresponding to the first signal can also occupy different time slots, that is to say, the time slots occupied by the first signal and the first SSB are different, and the frequency-domain resources occupied are also different.

[0024] Combining the first aspect and the second aspect, in some possible implementation manners, 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.

[0025] Wherein, the offset of the frequency-domain resources occupied by the first signal relative to the first frequency-domain reference can be simply referred to as the frequency-domain offset corresponding to the first signal.

[0026] A possible design is that the network device indicates the frequency-domain offset corresponding to the first signal to the terminal. In this way, the network device can flexibly configure the frequency-domain offset corresponding to the first signal.

[0027] Another possible design is that the frequency-domain offset corresponding to the first signal is predefined. In this way, signaling overhead can be saved.

[0028] Optionally, the above-mentioned first frequency-domain reference may be the frequency-domain resources occupied by the first SSB. That is to say, the frequency-domain offset corresponding to the first signal may refer to the offset relative to the frequency-domain resources occupied by the first SSB.

[0029] Combining the first aspect and the second aspect, in some possible implementation manners, the second indication information is carried in the first SSB, and the second indication information indicates that the first SSB and the first signal are frequency-division multiplexed. The above-mentioned frequency-division multiplexing is one of multiple multiplexing modes, and the multiple multiplexing modes include time-division multiplexing and / or frequency-division multiplexing.

[0030] 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 more data to be transmitted, the network device can indicate to the terminal that the first SSB and the first signal are frequency-division multiplexed to leave more time-domain resources for transmitting 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. The present application does not limit this.

[0031] Combining the first aspect and the second aspect, in some possible implementation manners, 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.

[0032] In a possible design, the network device indicates the system frame number, time slot number, and starting symbol of the first signal to the terminal. In this way, the network device can flexibly configure the system frame number, time slot number, and starting symbol of the first signal.

[0033] In another possible design, the system frame number, time slot number, and starting symbol of the first signal are predefined. In this way, signaling overhead can be saved.

[0034] Combining the first aspect and the second aspect, in some possible implementation manners, the system frame number of the first signal is the same as the system frame number of the first SSB.

[0035] 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.

[0036] Wherein, 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 protection scope of this application. For example, the time slot number of the first signal = the time slot number of the first SSB - n.

[0037] In addition, in this application, the relationships satisfied by the system frame number, time slot number, and starting symbol of the first signal and the system frame number, time slot number, and starting symbol of the first SSB are taken as examples by formulas, but this should not constitute any limitation to this application. For example, forms such as tables, arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash maps can also be used.

[0038] Combining the first aspect and the second aspect, in some possible implementation manners, 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. That is, the time slots occupied by the first signal and the first SSB are different.

[0039] For example, assuming an SSB period is 20 ms, then m = 2.

[0040] 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 period.

[0041] Combining the first aspect and the second aspect, in some possible implementation manners, 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 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 corresponding to the first signal among the multiple second-type signals.

[0042] Wherein, the DMRS corresponding to the first signal may be replaced by the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal may be replaced by the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as that this DMRS can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as that this DMRS can be used to demodulate the PDSCH.

[0043] 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. In this way, the first DMRS can also be used to demodulate the PDSCH, that is, the resources for PDSCH channel estimation are increased, which is conducive to improving the estimation accuracy of the PDSCH.

[0044] Combining the first aspect and the second aspect, in some possible implementation manners, 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 this DMRS include the first symbol and the second symbol. The frequency-domain resources occupied by this 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 corresponding to the first signal among the multiple second-type signals.

[0045] Wherein, the DMRS corresponding to the first signal may be replaced by the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal may be replaced by the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as that this DMRS can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as that this DMRS can be used to demodulate the PDSCH.

[0046] The above DMRS is a dual symbol, and the frequency-domain resources occupied by the DMRS on the first symbol and the second symbol are the same. In this way, on the one hand, the position originally used to transmit the DMRS corresponding to the first signal can be used to transmit the first signal. On the other hand, since the frequency-domain resources occupied by the DMRS on the first symbol and the second symbol are the same, it is equivalent to the DMRS for channel estimation being transmitted multiple times, which is beneficial to improving the accuracy of channel estimation.

[0047] In a third aspect, the present application provides a communication device that can implement the method described in the first aspect and any possible implementation manner of the first aspect, or implement the method described in the second aspect and any possible implementation manner 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 manners.

[0048] In a fourth aspect, the present application provides a communication device, which includes a processor. The processor can be used to execute a computer program in a memory to implement the method described in the first aspect and any possible implementation manner of the first aspect, or implement the method described in the second aspect and any possible implementation manner of the second aspect.

[0049] Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface. The communication interface is used to receive signals from other communication devices outside the device and transmit them to the processor, or send signals from the processor to other communication devices outside the device. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces.

[0050] Optionally, the device further includes a memory, and the processor is coupled to the memory. The memory is used to store program instructions and data. When the processor executes the instructions stored in the memory, the methods described in the above aspects can be implemented.

[0051] In a fifth aspect, the present application provides a communication device, including a processor and a communication interface. The communication interface is used to receive signals from other communication devices outside the communication device and transmit them to the processor, or send signals from the processor to other communication devices outside the communication device. The processor uses logic circuits or executes code instructions to implement the signal transmission method described in the first aspect and any possible implementation manner of the first aspect, or implement the signal transmission method described in the second aspect and any possible implementation manner of the second aspect. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces.

[0052] Optionally, the device further includes a memory for storing instructions and data. The memory can be coupled to the processor. When the processor executes the instructions stored in the memory, the signal transmission methods described in the first aspect and any possible implementation manner of the first aspect are implemented, or the signal transmission methods described in the second aspect and any possible implementation manner of the second aspect are implemented.

[0053] In a sixth aspect, the present application provides a communication device, including a processor and a memory. The memory is used for storing instructions and data. When the processor executes the instructions stored in the memory, the signal transmission methods described in the first aspect and any possible implementation manner of the first aspect can be implemented, or the signal transmission methods described in the second aspect and any possible implementation manner of the second aspect can be implemented.

[0054] Optionally, the device further includes a communication interface for the device to communicate with other communication devices. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces.

[0055] In a seventh aspect, the present application provides a computer-readable storage medium storing a computer program or instructions. When the computer program or instructions are executed, the methods described in the first aspect and any possible implementation manner of the first aspect are implemented, or the methods described in the second aspect and any possible implementation manner of the second aspect are implemented.

[0056] In an eighth aspect, the present application provides a computer program product including instructions. When the instructions are run, the methods described in the first aspect and any possible implementation manner of the first aspect are implemented, or the methods described in the second aspect and any possible implementation manner of the second aspect are implemented.

[0057] In a ninth aspect, the present application provides a chip system including at least one processor for supporting the implementation of the functions involved in the first aspect and any possible implementation manner of the first aspect, or for supporting the implementation of the functions involved in the second aspect and any possible implementation manner of the second aspect. For example, receiving or processing the data involved in the above methods, etc.

[0058] In a possible design, the chip system further includes a memory for storing program instructions and data. The memory is located inside or outside the processor.

[0059] The chip system can be composed of chips or can include chips and other discrete devices.

[0060] In a 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 manner of the first aspect, and the terminal is used to implement the method described in the second aspect and any possible implementation manner of the second aspect.

[0061] It should be understood that the third aspect to the tenth aspect of the present application correspond to the technical solutions of the first aspect and the second aspect of the present application. The beneficial effects achieved by each aspect and the corresponding feasible implementation manners are similar and will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided by the present application;

[0063] Figure 2 is a schematic diagram of an access network device applicable to the signal transmission method provided by the present application;

[0064] Figure 3 is a schematic diagram of the format of time-frequency resources for transmitting SSB provided by an embodiment of the present application;

[0065] Figure 4 is a schematic flowchart of an initial access process provided by an embodiment of the present application;

[0066] Figure 5 is a schematic diagram of DMRS provided by an embodiment of the present application;

[0067] Figure 6 is a schematic diagram of the multiplexing mode of SSB and SIB 1 provided by an embodiment of the present application;

[0068] Figure 7 is a schematic diagram of the time slot occupancy ratio of SSB and SIB 1 provided by an embodiment of the present application;

[0069] Figure 8 is a schematic flowchart of the signal transmission method provided by an embodiment of the present application;

[0070] Figure 9 is a schematic diagram of the multiplexing of SIB 1 and SSB provided by an embodiment of the present application;

[0071] Figure 10A is another schematic diagram of the multiplexing of SIB and SSB provided by an embodiment of the present application;

[0072] Figure 10B is yet another schematic diagram of the multiplexing of SIB and SSB provided by an embodiment of the present application;

[0073] Figure 11 is a schematic diagram of the starting symbol of the first SSB provided by an embodiment of the present application;

[0074] Figure 12 is a schematic diagram of DMRS provided by an embodiment of the present application;

[0075] Figure 13a and Figure 13b is a schematic diagram of component carrier switching for frequency division multiplexing provided by an embodiment of the present application;

[0076] Figure 14 is a schematic block diagram of a communication device provided by an embodiment of the present application;

[0077] Figure 15 is another schematic block diagram of a communication device provided by an embodiment of the present application;

[0078] Figure 16 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0079] Figure 17 is another schematic structural diagram of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0080] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0081] For the convenience of understanding the technical solutions provided by the present application, the following points are first explained:

[0082] First, in the present application, the terms "include" and "have" and any of their variations are intended to cover non-exclusive inclusion. For example, a device, system, product, or equipment that includes a series of modules, units, or components does not necessarily have to be limited to those modules, units, or components that are clearly listed, but may include other modules, units, or components that are not clearly listed or are inherent to these devices, systems, products, or equipment.

[0083] Second, in the present application, indication includes explicit indication (also known as direct indication) and implicit indication (also known as indirect indication). Among them, explicitly indicating information A means including this information A; implicitly indicating information A means 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 mean indicating information A through information B and a preset rule.

[0084] Third, in the present application, information C is used for the determination of information D, which includes both the case where information D is determined only based on information C and the case where it is determined based on information C and other information. In addition, for the case where information C is used for the determination of information D, there can also be an indirect determination situation, such as the situation where information D is determined based on information E, and information E is determined based on information C.

[0085] Fourth, in this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates an "or" relationship between the associated objects before and after, but does not exclude the case where it represents an "and" relationship between the associated objects before and after. The specific meaning represented can be understood in combination with the context. "At least one of the following" or its similar expressions refer 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 represent: a, b, c; a and b; a and c; b and c; or a, b, and c. Where a, b, and c can be single or multiple.

[0086] Fifth, in this application, the use of prefix words such as "first" and "second" is only for the convenience of distinguishing and describing different things belonging to the same name category, and does not restrict the order, size, or quantity of things. For example, "first indication information" and "second indication information" are just different indication information, and there is no time sequence relationship, size relationship, or priority relationship between them.

[0087] Sixth, in this application, "send" and "receive" represent the direction of signal transmission. For example, "sending information to a network device" can be understood as the destination of the information being the network device, which can include directly sending through the air interface, and also include indirectly sending through the air interface by other units or modules. "Receiving information from a terminal" can be understood as the source of the information being the terminal, which can include directly receiving from the terminal through the air interface, and can also include indirectly receiving from the terminal through the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0088] In other words, sending and receiving can be carried out between devices. For example, between a network device and a terminal; it can also be carried out within a device. For example, sending or receiving between components, modules, chips, software modules, or hardware modules within a device through a bus, trace, or interface.

[0089] Seventh, in this application, "when", "if", and "in case" all mean that the device will perform corresponding processing under certain objective circumstances, not limited to time, and do not require the device to have a judgment action when implemented, nor does it mean there are other limitations.

[0090] Eighth, in this application, words such as "example", "exemplarily", "for example" or "such as" are used to give examples, illustrations or explanations. Any embodiment or design described as "example", "exemplarily", "for example" or "such as" in this application should not be construed as more preferred or more advantageous than 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 specific manner.

[0091] Ninth, in this application, pre-configuration can be understood as preset, predefined, defined, pre-defined, stored, pre-stored, pre-negotiated, prefabricated, or pre-set, etc.

[0092] Tenth, the corresponding relationships shown in the various tables in this application can be configured or pre-defined. The values taken by the information in each table are merely examples and can be configured as other values, which are not limited in this application. When configuring the corresponding relationships between the configuration information and the various parameters, it is not necessarily required to configure all the corresponding relationships shown in the tables. For example, in the tables of this application, the corresponding relationships shown in some rows can also not be configured. Another example is that appropriate deformation 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 can also be other names understandable by the communication device, and the values taken or the representation methods of the parameters can also be other values or representation methods understandable by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash maps, etc.

[0093] Eleventh, the technical solution provided by 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), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th Generation (5G) mobile communication system or New Radio Access Technology (NR). Among them, the 5G mobile communication system can include Non-Standalone (NSA) and / or Standalone (SA). The technical solution provided by this application can also be applied to future communication systems, such as 6th Generation (6G) mobile communication system, etc. This application does not make any limitations in this regard.

[0094] Figure 1 It is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided by this application. Figure 1 It shows a schematic diagram of a possible and non-limiting system architecture.

[0095] As Figure 1 shown, the communication system 1000 includes a Radio Access Network (RAN) 100 and a Core Network (CN) 200. The RAN 100 includes at least one RAN node (such as Figure 1 110a and 110b in Figure 1 , collectively referred to as 110) and at least one terminal (such as Figure 1 120a - 120j in

[0096] The RAN 100 can be a cellular system related to the 3rd generation partnership project (3GPP), such as a 4G or 5G mobile communication system, or an evolved system for the future (such as a 6G mobile communication system). The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. The RAN 100 can also be a communication system that integrates two or more of the above systems.

[0097] The RAN node 110, sometimes also referred to as an access network device, RAN entity, access node, or network device, etc., is a part of the communication system used to assist the terminal in achieving wireless access. Multiple RAN nodes 110 in the communication system 1000 can be of the same type or different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative. For example, Figure 1 The network element 120i can be a helicopter or a drone, which can be configured as a mobile base station. For the terminal 120j that accesses the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN node 110 and the terminal 120 are sometimes both referred to as communication devices. For example, Figure 1 the network elements 110a and 110b in the figure can be understood as communication devices with base station functions, and the network elements 120a - 120j can be understood as communication devices with terminal functions.

[0098] In a possible scenario, the RAN node can 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, etc. The RAN node can be a macro base station (such as Figure 1 110a in the figure), a micro base station, or an indoor station (such as Figure 1110b) in the figure, a relay node or a donor node, or a radio controller in a CRAN scenario. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the access network device in vehicle to everything (V2X) technology may be a road side unit (RSU).

[0099] In another possible scenario, multiple RAN nodes cooperate to assist a terminal in achieving wireless access, and different RAN nodes respectively implement some functions of a base station. For example, the RAN node may be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU may be separately provided, or may also be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0100] In different systems, the 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 an ORAN system, the CU may also be called an open-CU (O-CU), the DU may also be called an open-DU (O-DU), the CU-CP may also be called an open-CU-CP (O-CU-CP), the CU-UP may also be called an open-CU-UP (O-CU-UP), and the RU may also be called an open-RU (O-RU). For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are used as examples for description. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0101] A terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can include, but is not limited to: mobile phone, tablet (pad), computer with wireless transceiver function, virtual reality (VR) device, augmented reality (AR) device, mixed reality (MR) device, extended reality (XR) device, wireless terminal in industrial control, in-vehicle device, wireless terminal in driverless, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, wearable device, video player, full-system projector, etc.

[0102] In this application, the network device can be, for example, Figure 1 the RAN node 110 shown in Figure 1 and the terminal can be, for example, the terminal 120 shown in. This application does not specifically limit the types of network devices and terminals.

[0103] In addition, the terminal and the network device can be hardware devices, or software functions running on dedicated hardware or software functions running on general hardware. For example, they are virtualization functions instantiated on a platform (such as a cloud platform), or entities including dedicated or general hardware devices and software functions. This application does not limit the specific forms of the terminal and the network device.

[0104] Figure 2 It is a schematic diagram of an access network device applicable to the signal transmission method provided in this application.

[0105] As Figure 2 shown, the access network device includes one or more CUs, one or more DUs, and one or more RUs. For clarity, Figure 2 only one CU, DU, and RU are shown in. The CU is used to connect to the core network and one or more DUs. Optionally, the CU can have some functions of the core network. The CU can include CU-CP and CU-UP.

[0106] 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 (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.). Another example is that 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 (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0107] When the CU includes a CU-CP and a CU-UP, the CU-CP is used to implement the control plane (C-plane) function of the CU, and the CU-UP is used to implement the user plane (U-plane) function of the CU. For example, when the CU is configured to implement the functions of the PDCP layer, the RRC layer, and the SDAP layer, the CU-CP is used to implement the functions of the RRC layer and the control plane (Controlplane part of PDCP, PDCP-C) layer of the PDCP layer, and the CU-UP is used to implement the functions of the SDAP layer and the user plane (userplane part of PDCP, PDCP-U) layer of the PDCP layer.

[0108] The CU-CP can interact with the network element in the core network that is used to implement the control plane function. The network element in the core network that is used to implement the control plane function can be an access and mobility function network element, 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 updates of terminal devices, registration of terminal devices with the network, handovers of terminal devices, etc.

[0109] CU-UP can interact with the network elements in the core network that are used to implement the user plane function. The network elements in the core network that are used to implement the user plane function, for example, the user plane function (UPF) network element in the 5G system, is responsible for the forwarding and reception of data in the terminal device.

[0110] The above configurations of the CU and DU are just examples, and the functions of the CU and DU can also be configured according to needs. For example, the CU or DU can be configured to have more protocol layer functions, 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 protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the protocol layers below the RLC layer are set in the DU. Another example is that the functions of the CU or DU can be divided according to the service type or other system requirements. For example, divided by latency, the functions that need to meet the requirement of small latency in processing time are set in the DU, and the functions that do not need to meet this latency requirement are set in the CU.

[0111] The DU and RU can cooperate to jointly implement the functions of the PHY layer. One DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the medium and radio frequency functions. Another example is that the DU is configured to implement the high-layer functions in the PHY layer (corresponding to Figure 2 the high physical layer in Figure 2 ), and the RU is configured to implement the low-layer functions in the PHY layer or implement the low-layer functions (corresponding to

[0112] the low physical layer in

[0113] ), and radio frequency (RF) functions. The high-layer functions in the physical layer can include a part of the functions of the physical layer, and this part of the functions is closer to the MAC layer. The low-layer functions in the physical layer can include another part of the functions of the physical layer, and this part of the functions is closer to the medium and radio frequency side.

[0112] The RU can be a TRP or a remote radio head (RRH) or other entities with similar functions. The low physical layer includes parts of the physical layer processing, such as processing functions like fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming, and filtering. The RU communicates with one or more terminals through a wireless link.

[0113] The DU and the RU may or may not be co-located. The DU and the RU exchange control plane information and user plane information via a fronthaul link through a lower-layer split control, user, and synchronization (LLS-CUS) interface. The LLS-CUS interface may include an LLS-C interface and an LLS-U interface that respectively provide the control plane and the user plane. In some examples, the control plane refers to the real-time control between the DU and the RU. The DU and the RU exchange management information through the LLS-M interface of the fronthaul link, and the management (M)-plane refers to the non-real-time management operations between the DU and the RU.

[0114] It should be understood that Figure 2 The structure of the access network device shown is only an example and should not impose any limitation on this application. Among them, Figure 2 The access network device shown may be, for example, an O-RAN device. The CU may also be replaced by an O-CU, the DU may also be replaced by an O-DU, the RU may also be replaced by an O-RU, the CU-CP may also be replaced by an O-CU-CP, the CU-UP may also be replaced by an O-CU-UP, the RAN CUS-plane may also be replaced by an O-RAN CUS-plane, and the RAN M-plane may also be replaced by an O-RAN M-plane.

[0115] To better understand the method provided in this application, the terms involved in this application will be briefly described below.

[0116] 1. SSB: It is the basis for cell search. The synchronization signal includes the PSS and the SSS. The PSS / SSS and the PBCH signal together are called the SSB. Among them, the MIB is transmitted on the PBCH, and the MIB is used to carry the scheduling information of the SIB, etc. The terminal can obtain the SIB information by reading the MIB information. The SIB is mainly divided into SIB 1 to SIB 13. Among them, SIB 1 is mainly used to evaluate the relevant information of whether the terminal is allowed to access a certain cell and is used to carry the scheduling information of other system information blocks. The functions of SIB 2 to SIB 13 can refer to the relevant protocols and will not be elaborated here.

[0117] In this application, the SSB and SIB correspond to each other, and it can be understood in this way: The SSB includes the 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 can be accessed, whether it supports the terminal to perform intra-frequency cell 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 resources 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 resources, where X takes values of 2, 3, 4... 13.

[0118] The following will be combined with Figure 3 to introduce in detail the format of the time-frequency resources for transmitting the SSB.

[0119] Figure 3 is a schematic diagram of the format of the time-frequency resources for transmitting the SSB provided by an embodiment of this application.

[0120] As Figure 3 shown, the time-domain resources for transmitting the SSB are 4 orthogonal frequency division multiplexing (OFDM) symbols (in this application, the OFDM symbol can be abbreviated as a symbol). Among them, the first OFDM symbol is used to carry the PSS, and the PSS occupies 127 subcarriers in the frequency domain; the 2nd OFDM and the 4th OFDM symbols are used to carry the PBCH signal, and the PBCH signal occupies 240 subcarriers in the frequency domain; the 3rd OFDM symbol is used to carry the SSS (the 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).

[0121] 2. Resource block (RB) and resource block group (RBG): The resource block can also be called a physical resource block (PRB), and correspondingly, the resource block group can also be called a physical resource block group. A resource block generally includes N resource elements (RE), and a resource element can also be called a subcarrier, where the value of N can be, for example, 12. A resource block group includes one or more resource blocks.

[0122] 3. Reference Signal (RS): It can be used for channel measurement, channel estimation, beam quality monitoring, etc. According to the function, the reference signal includes, for example, but is not limited to: DMRS, Channel State Information Reference Signal (CSI-RS), Phase Tracking Reference Signal (PTRS), Sounding Reference Signal (SRS), etc. Among them, DMRS and CSI-RS can be used to obtain channel information, and PTRS can be used to obtain phase change information.

[0123] 4. Physical Downlink Control Channel (PDCCH): It refers to the channel used to transmit downlink control information (DCI). For example, PDCCH can be used to transmit resource allocation, uplink scheduling permission, power control, and uplink retransmission information, etc. PDCCH occupies the first {1, 2, 3} symbols of a time slot in the time domain; in the frequency domain, it can occupy the full bandwidth or can be configured through parameters, and this application does not make a limitation on this.

[0124] 5. Physical Downlink Shared Channel (PDSCH): It refers to the channel used to transmit downlink user data. The resources occupied by PDSCH in the time domain can be indicated by the time domain resource allocation field in 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 DCI. Among them, the frequency domain resources indicated by the frequency domain resource allocation field in DCI can be in units of RBG or RB, and this application does not make a limitation on this.

[0125] In this application, SIB includes a first type of signal and a second type of signal. The first type of signal is the signal transmitted on PDCCH, and the second type of signal is the signal transmitted on PDSCH.

[0126] 6. Control Resource Set (CORESET) and Search Space: A set of physical resources that includes multiple RBs in the frequency domain and 1 / 2 / 3 OFDM symbols in the time domain. One CORESET corresponds to one or more terminals. For example, CORESET 1 corresponds to terminals 1, 2, 3, and 4, and CORESET 2 corresponds to terminals 4, 5, 6, and 7. CORESET 1 can be used to transmit the signals carried on the PDCCH corresponding to terminal 1, the signals carried on the PDCCH corresponding to terminal 2, the signals carried on the PDCCH corresponding to terminal 3, and the signals carried on the PDCCH corresponding to terminal 4. CORESET 2 can be used to transmit the signals carried on the PDCCH corresponding to terminal 4, the signals carried on the PDCCH corresponding to terminal 5, the signals carried on the PDCCH corresponding to terminal 6, and the signals carried on the PDCCH corresponding to terminal 7.

[0127] The search space is a region of the CORESET. A terminal can listen to the search space to detect a specific PDCCH (or DCI). A terminal has one search space on one CORESET, and the resources of this search space are less than or equal to the resources of this CORESET. A terminal can correspond to multiple CORESETs, and the numerology parameters on these multiple CORESETs can be the same or different. Among them, the numerology parameters include, for example, the subcarrier spacing and the cyclic prefix (CP) length.

[0128] CORESET 0 is a special CORESET, and CORESET 0 is used for the parsing of SIB 1.

[0129] In this application, CORESET 0 can be used to indicate the time domain resource length, frequency domain resource length, and offset of the PDCCH, as well as the multiplexing mode with the SSB; search space 0 is the search space corresponding to CORESET 0, and can be used to determine the system frame number, time slot, and OFDM symbol position where the PDCCH may exist. In addition, hereinafter, CORESET 0 and the PDCCH can be replaced. For example, the system frame number, time slot number, and start symbol corresponding to the first signal (one of the multiple first type 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.

[0130] The main parameter configurations of the control resource set and the search space will be introduced in detail below in combination with a table.

[0131] Table 1

[0132]

[0133] Table 1 is the main parameter configuration of the control resource set. One CCE includes 6 REGs, and one REG corresponds to one RB on one OFDM symbol. REG represents the resource corresponding to one symbol in the time domain and one RB in the frequency domain. The resources that the PDCCH may occupy and the resources actually occupied by the PDCCH can be described by CCEs.

[0134] Table 2 is the main parameter configuration of the search space.

[0135] Table 2

[0136]

[0137] Among them, the network device can schedule the transmission of the terminal's uplink data and the reception of the downlink data through the DCI carried on the PDCCH, but 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. And the PDCCH candidate is the location where the PDCCH carrying the DCI may exist. In order to reduce the number of blind detections of the terminal, the network device can configure these PDCCHs according to predefined rules, and the terminal performs blind detection according to the above rules.

[0138] 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.

[0139] 7. Initial access process: It is an important process for the terminal to connect to the network, mainly including PSS / SSS detection, PBCH and other system information decoding, and the physical random access channel (PRACH) process (which can be abbreviated as the random access process). The following will be combined with Figure 4 Describe the initial access process in detail.

[0140] Figure 4 It is the flow schematic diagram of the initial access process provided by the embodiment of the present application.

[0141] In step 410, the base station sends an SSB. Correspondingly, the terminal receives the SSB.

[0142] Among them, the SSB is periodically sent 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 0 (search space zero) and control resource set 0 (control resource set zero), etc.

[0143] In this application, the SSB that indicates SIB 1 is called the cell defining SSB (CD SSB), and the SSB that does not indicate SIB 1 is called the non-cell defining SSB (NCD SSB).

[0144] After the terminal powers on or needs to re-connect to the network, it can scan the SSBs from the base station to perform downlink time and frequency synchronization. This process can be called cell search.

[0145] In step 420, the base station sends a system information block (such as SIB 1). Correspondingly, the terminal receives the system information block.

[0146] Among them, the base station sends the system information block in a broadcast manner. The above system information block can be, for example, SIB 1. The SIB1 carries the information required in the random access process, such as the resource location of the PDCCH for transmitting message 2 (Msg 2), message 4 (Msg 4), etc., and can be used for the terminal to complete the random access process.

[0147] In step 430, the terminal performs a random access process.

[0148] Exemplarily, the terminal selects a suitable preamble according to SIB 1 and sends the above preamble to the base station (denoted as message 1 (Msg 1)). Correspondingly, 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. The message 2 can carry a timing advance (TA) to indicate the terminal to perform uplink synchronization.

[0149] Furthermore, after receiving message 2, the terminal can send an RRC connection establishment request message (RRCSetupRequest) (denoted 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 (denoted as message 4).

[0150] 8. DMRS corresponding to PDCCH and DMRS corresponding to PDSCH: In NR, the precoding of PDCCH and PDSCH is relatively independent (e.g., 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 configured independently to facilitate independent demodulation.

[0151] Among them, the precoding granularity can be understood as how many RBs or REGs are grouped for precoding during precoding.

[0152] The network device can configure the frequency-domain resources for DMRS, that is, the DMRS type. The DMRS type can also be called the DMRS configuration type. The following will combine Figure 5 to describe in detail the types of PDCCH DMRS and PDSCH DMRS.

[0153] Figure 5 is a schematic diagram of DMRS provided by an embodiment of the present application.

[0154] As Figure 5 shown in a) of, the frequency-domain density of PDCCH DMRS is 1 / 4, and in the frequency domain, it starts from RE 1. In other words, it starts from the second RE of a REG, that is, the starting RE is the second RE in the REG.

[0155] As Figure 5 shown in b) of, for the PDSCH DMRS corresponding to the messages (such as SIB 1, paging message, message 2, message 4, other system information, etc.) in the downlink broadcast / multicast / initial access process, 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.

[0156] As Figure 5 shown in b) of, for the downlink messages other than SIB 1 (such as message 2, message 4, paging message, other system information, or RRC configuration message, etc.), its PDSCH DMRS can also be configured as DMRS configuration type 2, and the starting RE is RE 0, that is, the starting RE is the first RE in the REG.

[0157] It should be understood that in the present application, for the convenience of description, when referring to indexes or identifiers, consecutive numbering can start from 1. For example, a REG includes 12 REs, and these 12 REs include the 1st to the 12th REs. Of course, the specific implementation is not limited to this. For example, consecutive numbering can start from 0, and in this case, these 12 REs include the 0th to the 11th REs.

[0158] 9. Component Carrier (CC): Each carrier participating in carrier aggregation is called a CC. Among all component carriers, the component carrier that carries signaling transmission and manages other component carriers is called the Primary Component Carrier (PCC), the cell corresponding to the primary carrier is called the Primary Cell (Pcell), other component carriers are called Secondary Component Carriers (SCCs), and the cell corresponding to the secondary carrier is called the Secondary Cell (Scell).

[0159] 10. Multiplexing Modes of SSB and SIB (Taking SIB 1 as an Example): Include time-division multiplexing, frequency-division multiplexing, and a combination of time-division multiplexing and frequency-division multiplexing. The multiplexing modes of SSB and SIB 1 will be described in detail below in combination with Figure 6 to describe the multiplexing modes of SSB and SIB 1 in detail.

[0160] Figure 6 is a schematic diagram of the multiplexing mode of SSB and SIB 1 provided by an embodiment of the present application. Among them, 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.

[0161] In addition, in Figure 6 , the frequency-domain resources occupied by SIB 1-PDCCH (the PDCCH carrying the first signal) and SIB 1-PDSCH (the PDSCH carrying the second signal) are the same.

[0162] As shown in a) of Figure 6 , SSB and SIB 1 adopt a time-division multiplexing mode, that is to say, SSB and SIB 1 are transmitted in a time-division manner. In this way, there are fewer time slots available for other signals such as data signals to be transmitted, resulting in poor downlink capacity.

[0163] As shown in b) of Figure 6 , SSB and the second signal adopt a frequency-division multiplexing mode, that is to say, the frequency-domain resources occupied by SSB and the second signal are different, and SSB and the second signal occupy the same time slot. As shown in Figure 6As shown in c) of [the relevant content], SSB and SIB1 adopt a frequency-division multiplexing mode. Among them, SIB1 includes a first signal and a second signal. That is to say, the frequency-domain resources occupied by SSB and SIB1 are different, and the time slots occupied by SSB and SIB1 are the same.

[0164] The following will be combined with Figure 7 to describe in detail the time slot occupancy ratio of SSB and SIB1. In this application, SIB1 includes a first signal and a second signal scheduled by the first signal, which will not be elaborated below.

[0165] Figure 7 It is a schematic diagram of the time slot occupancy ratio of SSB and SIB1 provided by an embodiment of this application.

[0166] As Figure 7 shown, during the initial access process, the period of SSB is 20 ms. Within these 20 ms, the network device can send SSB using 8 beams. For example, the SSB of these 8 beams are respectively identified by SSB#0 to SSB#7, and a total of 4 downlink time slots are occupied. After the network device sends SSB using the above 8 beams, after several time slots, it can send SIB1 (such as SIB1#0 to SIB1#7 in the figure), and SIB1 occupies a total of 8 downlink time slots. It can be seen that only one SIB1 is transmitted on one time slot, or rather, only one first type of signal is transmitted on one time slot, or only one second type of signal is transmitted on one time slot. Therefore, within the 32 downlink time slots within these 20 ms, the time slot occupancy ratio of SIB1 is 8 / 32 = 25%, and the time slot occupancy ratio is relatively high (or the time slot occupancy ratio of the first type of signal is relatively high, or the time slot occupancy ratio of the second type of signal is relatively high), which in turn leads to a lower downlink capacity.

[0167] To solve the above problems, this application provides a signal transmission method. After the network device sends multiple SSBs, it can send multiple first type of signals corresponding to the above multiple SSBs. These multiple first type of signals are used to schedule multiple second type of signals. The time slots occupied by these multiple first type of signals are the same, and the frequency-domain resources occupied are different. That is to say, these multiple first type of signals can adopt a frequency-division multiplexing mode. In this way, the time slot occupancy ratio is reduced, and the time slots originally used to transmit the first type of signal can be used to transmit other signals, which is conducive to improving the downlink capacity.

[0168] Similarly, the time slots occupied by the above multiple second type of signals are the same, and the frequency-domain resources occupied are different. In this way, the time slot occupancy ratio of the second type of signal can be reduced, and the time slots originally used to transmit the second type of signal can be used to transmit other signals, which is conducive to improving the downlink capacity.

[0169] The following will combine the accompanying drawings to elaborate in detail on the signal transmission method provided by this application.

[0170] Figure 8 It is a schematic flowchart of the signal transmission method 800 provided by an embodiment of the present application. Figure 8 This method is only described by taking the interaction between a network device and a terminal as an example, and should not constitute any limitation to the present application. Figure 8 The network device in [description] can also be replaced by components configured in the network device (such as chips, chip systems, processors, etc.), or, logical modules or software that can implement all or part of the functions of the network device. The terminal can be replaced by components configured in the terminal (such as chips, chip systems, processors, etc.), or, logical modules or software that can implement all or part of the functions of the terminal.

[0171] It should be understood that the method provided by the present application can be applicable to frequency range (FR) 1, and can also be applicable to FR 2. Among them, FR 1 refers to 450 megahertz (MHz) to 6000 MHz, and FR 2 refers to 24.25 gigahertz (GHz) to 52.6 GHz. The present application does not limit the applicable frequency range.

[0172] Figure 8 The method 800 shown includes step 810 and step 820. Each step in the method 800 will be described in detail below.

[0173] In step 810, the network device sends multiple SSBs.

[0174] The above-mentioned multiple SSBs can be, for example, the SSBs sent within one time slot. For example, the number of the above-mentioned multiple SSBs is 2, that is, the network device sends 2 SSBs within one time slot.

[0175] Exemplarily, in a RAN deployed with CU, DU, and RU, the specific implementation of step 810 can be: CU-CP sends the above-mentioned multiple SSBs to the terminal through DU and RU; in ORAN, the specific implementation of step 810 can be: O-CU-CP sends the above-mentioned multiple SSBs to the terminal through O-DU and O-RU.

[0176] It can be understood that the network device sends multiple SSBs. Correspondingly, the terminal can receive at least one of the above-mentioned multiple SSBs. Exemplarily, the terminal receives the first SSB, and the first SSB is one of the above-mentioned multiple SSBs.

[0177] In step 820, the network device sends multiple first-type signals. The time slots occupied by the multiple first-type signals are the same, and the frequency domain resources occupied by the multiple first-type signals are different.

[0178] Among them, 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, and the multiple first - type signals correspond one - to - one with the multiple second - type signals. The first - type signals can be, for example, the signals carried on the PDCCH. That is to say, the multiple first - type signals carried on the PDCCH for scheduling the multiple second - type signals occupy the same time slot but different frequency - domain resources.

[0179] The multiple first - type signals can refer to multiple first - type signals within one time slot. For example, two first - type signals within one time slot. The network device sends two first - type signals within the same time slot, and the two first - type signals occupy different frequency - domain resources. Similarly, the multiple second - type signals can refer to multiple second - type signals within one time slot. For example, two second - type signals within one time slot. The network device sends two second - type signals within the same time slot, and the two second - type signals occupy different frequency - domain resources.

[0180] The second - type signals can be the signals carried on the PDSCH, such as system messages. In practical applications, the first - type signals and the second - type signals can usually be regarded as a whole (i.e., SIB). The SIB can be, for example, SIB 1.

[0181] In addition, in this application, the multiple first - type signals and the multiple second - type signals are in one - to - one correspondence. That is to say, when the network device sends a first - type signal, it will send a second - type signal. Among them, the first - type signal can be carried on the PDCCH, and the second - type signal can be carried on the PDSCH. In this application, the multiple first - type signals occupy the same time slot and different frequency - domain resources. That is to say, the multiple first - type signals can be frequency - division multiplexed. When the multiple first - type signals are frequency - division multiplexed, the multiple second - type signals are also frequency - division multiplexed. In other words, the statement that the multiple first - type signals occupy the same time slot and different frequency - domain resources can also be replaced by: the multiple second - type signals occupy the same time slot and different frequency - domain resources.

[0182] It can be understood that the signals carried on the PDCCH (i.e., the first - type signals) and the signals carried on the PDSCH (i.e., the second - type signals) can occupy the same time slot. In this case, the statement that the multiple first - type signals occupy the same time slot and different frequency - domain resources can also be replaced by the statement that multiple SIBs occupy the same time slot and different frequency - domain resources.

[0183] It can be understood that the signals carried on the above-mentioned PDCCH (i.e., the first type of signals) and the signals carried on the PDSCH (i.e., the SIB) may also occupy different time slots. In other words, the first type of signals and the SIB may also be cross-time slot, and the present application does not limit this.

[0184] Exemplarily, 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 type of 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 type of signals to the terminal through the O-DU and O-RU.

[0185] It can be understood that the network device sends multiple first type of signals. Correspondingly, the terminal can receive at least one of the above-mentioned multiple first type of signals. Exemplarily, the terminal receives the first signal, and the first signal is one of the above-mentioned multiple first type of signals.

[0186] It should be noted that in the present application, there are at least 2 SIBs in the same time slot, and the information carried by the SIBs is the same, which is the relevant indication information of the same cell. Therefore, after the terminal detects and demodulates the first signal for scheduling the SIB, it can obtain 2 SIBs at the same time. Assuming that the SIBs occupy the same time domain and have the same absolute value of frequency domain offset, the terminal can only demodulate the SIB with a larger 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.

[0187] Optionally, the above-mentioned multiple first type of signals occupy the same time slot and different frequency domain resources. A possible design is that the above-mentioned multiple first type of signals and the above-mentioned multiple SSBs may occupy the same frequency domain resources. That is to say, the above-mentioned multiple SSBs and the above-mentioned multiple first type of signals are transmitted in a time-division manner, and the above-mentioned multiple first type of signals are frequency-division multiplexed. That is, the above-mentioned multiple first type of signals occupy the same time slot and different frequency domain resources. Exemplarily, after the network device sends the above-mentioned multiple SSBs in the first time slot, it sends the above-mentioned multiple first type of signals in the second time slot, and the multiple first type of signals occupy different frequency domain resources, where the second time slot may be, for example, the next time slot after the first time slot.

[0188] Similarly, the above-mentioned multiple second-type signals and the above-mentioned multiple SSBs can also occupy the same frequency-domain resources. That is to say, the above-mentioned multiple SSBs and the above-mentioned multiple second-type signals are transmitted time-divisionally, and the above-mentioned multiple second-type signals are frequency-division multiplexed. That is, the above-mentioned multiple second-type signals occupy the same time slots but different frequency-domain resources, while these multiple second-type signals and the above-mentioned multiple SSBs occupy different time slots but the same frequency-domain resources. In this way, a part of the time slots used for transmitting the second-type signals can be saved for transmitting other signals, thereby improving the downlink capacity. Exemplarily, after the network device transmits the above-mentioned multiple SSBs in the first time slot, it transmits the above-mentioned multiple second-type signals in the second time slot, and the frequency-domain resources occupied by these multiple second-type signals are different. Herein, the second time slot can be, for example, the next time slot after the first time slot.

[0189] The signals carried on the above-mentioned PDCCH (i.e., the first-type signals) and the signals carried on the PDSCH (i.e., the second-type signals) 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 to say, the above-mentioned multiple SSBs and the above-mentioned multiple SIBs are transmitted time-divisionally, and the above-mentioned multiple SIBs are frequency-division multiplexed. That is, the above-mentioned multiple SIBs occupy the same time slots but different frequency-domain resources, while these multiple SIBs and the above-mentioned multiple SSBs occupy different time slots but the same frequency-domain resources.

[0190] Another possible design is that the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs can occupy different frequency-domain resources. That is to say, the above-mentioned multiple SSBs and the above-mentioned multiple first-type signals are frequency-division transmitted. That is, within the same time slot, the network device transmits the above-mentioned multiple SSBs and the above-mentioned multiple first-type signals, the frequency-domain resources occupied by the above-mentioned multiple first-type signals are different, and the frequency-domain resources occupied by the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs are different. Exemplarily, the network device transmits the above-mentioned 2 SSBs within the first time slot and transmits 2 first-type signals within the first time slot. These 2 first-type signals respectively occupy frequency-domain resource #1 and frequency-domain resource #2, and these 2 SSBs occupy frequency-domain resource #3.

[0191] It should be noted that the above-mentioned multiple first-type signals and the above-mentioned multiple second-type signals are in one-to-one correspondence. Therefore, the statement that the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs can occupy different frequency-domain resources can also be replaced with: the above-mentioned multiple second-type signals and the above-mentioned multiple SSBs can occupy different frequency-domain resources. When the first-type signals and the second-type signals occupy the same time slot, the statement that the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs can occupy different frequency-domain resources can also be replaced with: multiple SIBs and the above-mentioned multiple SSBs can occupy different frequency-domain resources. Each SIB includes a first-type signal carried on the PDCCH and a second-type signal carried on the PDSCH.

[0192] The following will describe in detail the case where the above-mentioned multiple first-type signals and the above-mentioned multiple SSBs can occupy different frequency-domain resources.

[0193] A possible design is that the above-mentioned multiple first-type signals and the above-mentioned 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 above-mentioned multiple first-type 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 the same time slot, but the first signal and the first SSB occupy different frequency-domain resources.

[0194] Figure 9 is a schematic diagram of the multiplexing of SIB 1 and SSB provided by an embodiment of the present application. In Figure 9 , taking two of the multiple SIBs (such as SIB1) as an example and two of the multiple SSBs as an example, in other words, the network device sends two SSBs and two SIB 1s within one time slot. Among them, SIB 1-PDCCH represents the channel for carrying the first-type signal, SIB 1-PDSCH represents the channel for carrying the second-type signal, and SIB 1 includes the first-type signal and the second-type signal.

[0195] As Figure 9 shown, the network device sends two SSBs within one time slot, and also sends two SIB1s within the same time slot. For example, Figure 9 the signal carried on the PDCCH 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 original two time slots for transmitting SIB 1 can be used as data transmission (PDSCH) time slots.

[0196] Another possible design is that the above-mentioned multiple first-type 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-type 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, where the first time slot and the second time slot are different time slots.

[0197] Optionally, the offset of the frequency-domain resource 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. Wherein, the first signal is one of the above-mentioned multiple first-type signals, and the first SSB is the SSB corresponding to the first signal among the above-mentioned multiple SSBs.

[0198] 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 make any limitations in this regard.

[0199] Optionally, the above-mentioned first frequency-domain reference can be the frequency-domain resources occupied by the first SSB. That is to say, the frequency-domain offset of the first signal can 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 can also adopt other designs. For example, when the first frequency-domain reference is 0, the network device can indicate the frequency-domain offset corresponding to the first signal to the terminal, and can also indicate the frequency-domain offset corresponding to the first SSB. Exemplarily, when the first frequency-domain reference is 0, the above-mentioned multiple first-type signals include signal #1 and signal #2, and the above-mentioned multiple SSBs include SSB #1 and SSB #2, where 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 offsets corresponding to SSB #1 and SSB #2 are 97, and the frequency-domain offset corresponding to signal #2 is 99, with the unit being RB.

[0200] The situation where the first frequency-domain reference is the frequency-domain resources occupied by the first SSB will be described in detail below.

[0201] A possible design is that the offsets of the frequency-domain resources occupied by each of the above-mentioned multiple first-type signals relative to the frequency-domain resources occupied by the corresponding SSB are all positive numbers.

[0202] Another possible design is that the offsets of the frequency-domain resources occupied by each of the above-mentioned multiple first-type signals relative to the frequency-domain resources occupied by the corresponding SSB are all negative numbers.

[0203] Another possible design is that for some of the above-mentioned multiple first-type signals, the offsets of the frequency-domain resources they occupy relative to the frequency-domain resources occupied by the corresponding SSB are positive numbers, and for the other part of the first-type signals, the offsets of the frequency-domain resources they occupy relative to the frequency-domain resources occupied by the corresponding SSB are negative numbers.

[0204] It should be understood that in this application, the first-type signals and the multiple second-type signals are in one-to-one correspondence. Therefore, the above-mentioned multiple second-type signals and the above-mentioned multiple SSBs are in one-to-one correspondence, and the offsets of the above-mentioned multiple second-type signals relative to the frequency-domain resources occupied by the corresponding SSB can also adopt the above three possible designs. Or, the offsets of the multiple SIBs relative to the frequency-domain resources occupied by the corresponding SSB can also adopt the above three possible designs. Each of the above-mentioned multiple SIBs includes a signal carried on the PDCCH and a signal carried on the PDSCH.

[0205] Below will be combined withFigure 10A Provide a detailed explanation of the above possible designs.

[0206] Figure 10A is another schematic diagram of the multiplexing of SIB and SSB provided by the embodiments of the present application. In Figure 10A , taking two SIBs (such as SIB 1) as an example and two SSBs as an example, in other words, the network device sends two SSBs and two SIB 1s within one time slot. In Figure 10A , taking one SSB scanning period as an example, within this SSB scanning period, the network device sends 8 SSBs, which are respectively identified by SSB#0 to SSB#7 and occupy a total of 4 downlink time slots.

[0207] In Figure 10A , 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 SIB1#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.

[0208] The frequency-domain resources occupied by the SSB can be fixed at 20 RBs, and the frequency-domain resources occupied by SIB 1 are variable, such as {24 RBs, 48 RBs, 96 RBs}, which are determined by the "ControlResourceSetZero" field carried in the MIB of the PBCH. The maximum bandwidth allocated for a single CC of the downlink broadcast channel is 273 RBs. Therefore, at most 2 SIB 1s with a length of 96 RBs can be transmitted in the frequency domain within a single time slot. At this time, this SIB 1 includes the signal carried on the PDCCH and the signal carried on the PDSCH. To maximize the utilization rate of frequency-domain resources, two SIB 1s can be sent within one time slot, for example.

[0209] As Figure 10A shown in a) of

[0210] As Figure 10AAs shown in b) in [reference], the frequency domain offset of SIB 1 corresponding to the first SSB within 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.

[0211] As Figure 10A As shown in c) in [reference], the frequency domain offsets of SIB 1 corresponding to each SSB within the same time slot are all positive or all 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, SIB1#3, SIB 1#5, and SIB 1#7 are greater than 0.

[0212] As Figure 10A As shown in d) in [reference], the frequency domain offset of SIB 1 corresponding to the first SSB within the same time slot is positive, and the frequency domain offset of SIB 1 corresponding to the second SSB is negative; 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 offsets of SIB 1#0, SIB 1#2, and SIB 1#4 are greater than 0, and the time slot offset is 1 time slot; the frequency domain offsets of SIB 1#1, SIB 1#3, and SIB 1#5 are 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 (such as 40 time slots); the frequency domain offset of SIB 1#7 is less than 0, and the time slot offset is 40 time slots.

[0213] It should be understood that in Figure 10A d) in [reference], taking the frequency domain offset of SIB 1 corresponding to the first SSB within the same time slot as positive and the frequency domain offset of SIB 1 corresponding to the second SSB as negative as an example, this should not constitute any limitation to this application. For example, the frequency domain offset of SIB 1 corresponding to the first SSB within the same time slot can be negative, and the frequency domain offset of SIB1 corresponding to the second SSB can be positive; or, the frequency domain offsets of SIB 1 corresponding to the first SSB and the second SSB within the same time slot are both positive or both negative.

[0214] It can be understood that in Figure 10A [reference], taking the above-mentioned multiple SIBs and the above-mentioned multiple SSBs occupying different frequency domain resources as an example, as previously mentioned, the above-mentioned multiple SSBs and the above-mentioned multiple SIBs can also be transmitted time-divisionally, and the above-mentioned multiple SIBs are frequency-division multiplexed, that is, the above-mentioned multiple SIBs occupy the same time slot and different frequency domain resources. The following will be combined with Figure 10BDescribe the above scenario.

[0215] Figure 10B It is another schematic diagram of the multiplexing of SIB and SSB provided by the embodiment of the present application.

[0216] As Figure 10B shown, the network device sends SSB#0 and SSB#1 in the first time slot, and sends SIB1#0 and SIB 1#1 in the next time slot. Among them, 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 the present 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 designs of SIB 1#0 and SIB 1#1, and will not be elaborated here.

[0217] 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 referred to Figure 10A , and will not be elaborated one by one here.

[0218] It should be understood that Figure 10B shows a scenario where the network device continuously sends two SSBs, but this should not impose any limitation on the present application. For example, the network device can 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 referred to Figure 10B , and will not be elaborated here.

[0219] Optionally, the first SSB carries second indication information, and the second indication information indicates that the first SSB and the first signal are frequency division multiplexed. The above frequency division multiplexing is one of multiple multiplexing modes, and the multiple multiplexing modes include time division multiplexing and / or frequency division multiplexing.

[0220] The network device can indicate the multiplexing mode of the first SSB and the first signal to the terminal. Exemplarily, FR 1 supports frequency division multiplexing (such as the multiplexing modes shown in a) of Figure 10A , b) of Figure 10A , and c) of Figure 10A are frequency division multiplexing) (denoted as multiplexing mode 1) and time division multiplexing (denoted as multiplexing mode 2), then the network device can indicate the multiplexing mode of the first SSB and the first signal to the terminal.

[0221] 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.

[0222] A possible design is that, as shown in Table 3, the network device indicates the multiplexing mode of the first signal and the first SSB to the terminal through a reserved field (such as 1 bit) in the MIB of the PBCH. For example, when the value of this reserved field is 0, it represents multiplexing mode 1, and when the value of this reserved field is 1, it represents multiplexing mode 2; or when the value of this reserved field is 1, it represents multiplexing mode 1, and when the value of this reserved field is 0, it represents multiplexing mode 2.

[0223] Table 3

[0224]

[0225] In addition, the network device and the terminal can pre-agree on the positive or negative of the frequency-domain offset of the first signal relative to the first SSB in multiplexing mode 1. In one example, when the index value of the first SSB obtained by the terminal is even (such as 0, 2, 4, 6), the offset indicated in the subsequent "ControlResourceSetZero" field is positive; when the index value of the first SSB is odd (1, 3, 5, 7), the offset indicated in the subsequent "ControlResourceSetZero" field is negative. Or when the index value of the first SSB obtained by the terminal is even (such as 0, 2, 4, 6), the offset indicated in the subsequent "ControlResourceSetZero" field is negative; when the index value of the first SSB is odd (1, 3, 5, 7), the offset indicated in the subsequent "ControlResourceSetZero" field is positive. This application does not make any limitations in this regard.

[0226] In another example, the network device and the terminal pre-agree that the offsets indicated in the subsequent "ControlResourceSetZero" field are all positive or all negative.

[0227] It can be understood that when the network device and the terminal agree that the offset indicated in the subsequent "ControlResourceSetZero" field is negative, after the terminal obtains the offset, it can take the opposite of this offset as the frequency-domain offset corresponding to the first signal.

[0228] 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. Additionally, the "ControlResourceSetZero" field can also indicate the frequency-domain offset corresponding to the first signal and the positive or negative of the frequency-domain offset. In this design, it is beneficial to improve 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 48 RBs and 96 RBs) appear within the same SSB scanning period (5 ms), the positive and negative values of the frequency-domain offset may switch, and it is more flexible to indicate through the "ControlResourceSetZero" field.

[0229] Optionally, 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.

[0230] In this 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 of the PDCCH carrying the first signal, or the system frame number, time slot number, and starting symbol of CORESET 0.

[0231] One possible design is that the system frame number, time slot number, and starting symbol of the first signal are predefined.

[0232] 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.

[0233] Exemplarily, 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). Among them, the monitoring occasion includes the system frame number (which can be denoted as SFN c ) and the time slot number (which can be denoted as n c ), and the starting symbol position refers to the starting OFDM symbol index of the first signal in time slot n c .

[0234] Next, the relationship satisfied by the system frame number, time slot number, and starting symbol of the first signal and the system frame number, time slot number, and starting symbol of the first SSB will be described in detail.

[0235] 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.

[0236] 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. Alternatively, 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, and the time slot coding of the first signal is the sum of the time slot coding of the first SSB and n.

[0237] Wherein, n is a positive integer, and n ≤ the number of time slots included in a system frame - 1, that is, n is less than or equal to the difference between the number of time slots included in a system frame and 1.

[0238] Wherein, 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 protection scope of this application. For example, the time slot number of the first signal = the time slot number of the first SSB - n.

[0239] For one example, as Figure 10A shown in a) of Figure 10A shown in b) of Figure 10A shown in c) of

[0240] For another example, as Figure 10A shown in d) of

[0241] When the system frame number of the first signal = the system frame number of the first SSB + m, wherein, m is the number of system frames included in one period of the first SSB. That is, the time slots occupied by the first signal and the first SSB are different, and the system frame number of the first signal is the sum of the system frame number of the first SSB and m.

[0242] Exemplarily, assuming that one SSB period is 20 ms, then m = 2. As Figure 10A shown in d) of

[0243] 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 period.

[0244] Exemplarily, as Figure 10AAs shown in d) in [reference], when the index value of the SSB is 6 or 7, the time slot number of the first signal corresponding to the SSB = the time slot number of the first SSB in the next SSB period.

[0245] For the starting symbol of the first signal, a 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 is beneficial to reducing signaling overhead. In this case, the starting symbol of the first signal can be different from the starting symbol of the first SSB.

[0246] 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. First, a simple description of the possible designs of the starting symbol of the first SSB will be given below.

[0247] Figure 11 is a schematic diagram of the starting symbol of the first SSB provided by an embodiment of the present application.

[0248] As Figure 11 shown, a possible situation (denoted as situation A) is that the starting symbol index is 4 in time slots 0 and 2, and the starting symbol index is 2 in time slots 1 and 3. Another possible situation (denoted as situation B) is that the starting symbol index is 2 in all time slots 0 to 3.

[0249] When the starting symbol of the first SSB is in situation C, the starting symbol index of the first signal is 2. When the starting symbol of the first SSB is in situation B, the starting symbol of the first signal satisfies the following design:

[0250] When the first SSB and the first signal occupy the same time slot (as shown in a) in Figure 10A , b) in Figure 10A , c) in Figure 10A ), when the index of the first SSB is 0, 1, 4, 5, the starting symbol index of the first signal = 4, and when the index value of the first SSB is 2, 3, 6, 7, the starting symbol index of the first signal = 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}.

[0251] When the first SSB and the first signal occupy different time slots and the time slot offset is 1 (as shown in Figure 10AAs shown in d) of , when the index value of the first SSB is 0, 1, 4, or 5, the starting symbol index of the first signal = 2; when the index of the first SSB is 2, 3, 6, or 7, the starting symbol index of the first signal = 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}.

[0252] In this application, the relationships satisfied by the system frame number, time slot number, and starting symbol of the first signal and those of the first SSB are exemplified by formulas, but this should not impose any limitations on this application. For example, forms such as tables, arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash maps can also be used. For example, Table 4 shows the relationships satisfied by the system frame number, time slot number, and starting symbol of the first signal and those of the first SSB.

[0253] Table 4 shows the possible designs of the listening opportunities and starting symbols of the first signal. Among them, SFNSSB,i represents the system frame number of the first SSB corresponding to the first signal, nSSB,i represents the time slot number of the first SSB, and nSSB,j represents the time slot number of the first SSB in the next SSB period.

[0254] Table 4

[0255]

[0256]

[0257] The following will combine Figure 12 to provide a detailed description of the DMRS corresponding to the first signal and the DMRS corresponding to the second signal.

[0258] Figure 12 is a schematic diagram of the DMRS provided by an embodiment of this application. Among them, Figure 12 a) in is the design of the existing DMRS, Figure 12 b) in , Figure 12 c) in , Figure 12 d) in is the design of the DMRS provided by this application.

[0259] As Figure 12As shown in a) of [reference], the DMRS corresponding to the first signal and the DMRS corresponding to the second signal are designed separately, and their antenna port numbers are different. 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 the DMRS resource overhead and the channel estimation performance gain. Therefore, in this application, the following three possible designs are proposed:

[0260] As Figure 12 shown in b) of [reference], in the first possible design, 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 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.

[0261] As Figure 12 shown in c) of [reference], in the 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 this DMRS include the first symbol and the second symbol, and the frequency-domain resources occupied by this 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 the second-type signal corresponding to the first signal among the above-mentioned multiple second-type signals.

[0262] As Figure 12 shown in d) of [reference], in the 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 this DMRS include the first symbol and the second symbol, and the frequency-domain resources occupied by this DMRS on the first symbol and the second symbol are different.

[0263] Among them, the DMRS corresponding to the above first signal can be replaced by the DMRS corresponding to the PDCCH carrying the first signal, and the DMRS corresponding to the second signal can be replaced by the DMRS corresponding to the PDSCH carrying the second signal. The DMRS corresponding to the PDCCH carrying the first signal can be understood as that this DMRS can be used to demodulate the PDCCH, and the DMRS corresponding to the PDSCH carrying the second signal can be understood as that this DMRS can be used to demodulate the PDSCH.

[0264] It can be understood that NR supports a maximum of 4CCs (such as CC#0 to CC#3) for carrier aggregation. In a possible implementation, only one CC performs SIB 1 and SSB frequency division multiplexing every 20 ms (or, SIB 1 and SSB frequency division multiplexing, or, the signal scheduling SIB1 and SSB frequency division multiplexing), and the remaining CCs do not send SIB 1, and CC#0 to CC#3 are traversed within 80 ms.

[0265] Figure 13a and Figure 13b is a schematic diagram of component carrier switching for frequency division multiplexing provided by an embodiment of the present application.

[0266] As Figure 13a shown, within the first 20 ms, CC#0 performs frequency division; within the second 20 ms, CC#1 performs frequency division; as Figure 13b shown, within the third 20 ms, CC#2 performs frequency division, and within the fourth 20 ms, CC#3 performs frequency division. In this way, it is beneficial to flexibly control the period of SIB 1 in each cell to ensure that only one cell performs frequency division multiplexing at each moment, and other cells do not send SIB 1, which is beneficial to reducing the time slot occupancy ratio of SIB 1.

[0267] Based on the above technical solution, after the network device sends multiple SSBs, it can send multiple first-type signals corresponding to the multiple SSBs. These multiple first-type signals are used to schedule multiple second-type signals. The time slots occupied by these multiple first-type signals are the same, and the frequency domain resources occupied are different. That is to say, these multiple first-type signals can be frequency division multiplexed. In this way, the time slot occupancy ratio is reduced, and the time slots originally used to transmit the first-type signals can be used to transmit other signals, which is beneficial to improving the downlink capacity. In addition, the different frequency domain resources occupied by the above multiple first-type signals are also beneficial to improving the utilization rate of frequency domain resources.

[0268] Above, the signal transmission method provided by the embodiment of the present application has been described in detail with reference to the accompanying drawings. Below, the device provided by the embodiment of the present application will be described in detail with reference to the accompanying drawings.

[0269] It should be understood that Figure 14 and Figure 15 the devices shown can be used to implement the functions of the network device or the terminal in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the device can be the network device in the method embodiment as Figure 8 shown, or a component configured in the network device (such as a chip, a chip system, a processor, etc.), or a logic module or software capable of implementing part or all of the functions of the network device; or, the device can be the terminal in the method embodiment as Figure 8 shown, or a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or a logic module or software capable of implementing part or all of the functions of the terminal.

[0270] Figure 14 is a schematic block diagram of a communication device 1400 provided by an embodiment of the present application.

[0271] As Figure 14As shown, the device 1400 includes a first transceiver module 1410 and a second transceiver module 1420. The device 1400 can be used to implement the functions of the network device or the terminal in the method embodiments described above. Figure 8 functions of the network device or the terminal in the method embodiments shown above.

[0272] When the device 1400 is used to implement Figure 8 the functions of the network device in the method embodiments shown above, the first transceiver module 1410 is used to send multiple SSBs; the second transceiver module 1420 is used to send multiple first type signals, the multiple first type signals correspond to the multiple SSBs one by one, the multiple first type signals are used to schedule multiple second type signals, the multiple first type signals correspond to the multiple second type signals one by one, the multiple first type signals occupy the same time slot, and the multiple first type signals occupy different frequency domain resources.

[0273] When the device 1400 is used to implement Figure 8 the functions of the terminal in the method embodiments shown above, the first transceiver module 1410 is used to receive a first SSB, the first SSB is one of the multiple SSBs; the second transceiver module 1420 is used to receive a first signal, the first signal is one of the multiple first type signals, the multiple first type signals correspond to the multiple SSBs one by one, the multiple first type signals are used to schedule multiple second type signals, the multiple first type signals correspond to the multiple second type signals one by one, the multiple first type signals occupy the same time slot, and the multiple first type signals occupy different frequency domain resources.

[0274] Optionally, the first signal and the first SSB occupy different frequency domain resources. The above first signal is one of the above multiple first type signals, and the above first SSB is the SSB corresponding to the first signal among the above multiple SSBs.

[0275] Optionally, the above first signal and the above first SSB occupy the same time slot or different time slots.

[0276] Optionally, the frequency domain offset corresponding to the first signal is predefined or indicated by the first indication information carried in the first SSB, where the frequency domain offset corresponding to the first signal is the offset of the frequency domain resource occupied by the first signal relative to the first frequency domain reference.

[0277] Optionally, the above first frequency domain reference may be the frequency domain resource occupied by the first SSB.

[0278] 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 frequency division multiplexing is one of multiple multiplexing modes, and the multiple multiplexing modes include time division multiplexing and / or frequency division multiplexing.

[0279] Optionally, 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.

[0280] Optionally, the system frame number of the first signal is the same as the system frame number of the first SSB.

[0281] 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 one system frame - 1.

[0282] 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.

[0283] Optionally, the time slot number of the first signal = the time slot number corresponding to the first SSB in the next SSB period.

[0284] 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-type signals, and the second signal is the second-type signal corresponding to the first signal among the above-mentioned multiple first-type signals.

[0285] 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 this DMRS include the first symbol and the second symbol, and the frequency domain resources occupied by this 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.

[0286] For a more detailed description of each of the above modules, reference can be directly made to Figure 8 the relevant descriptions in the method embodiments shown, which will not be elaborated here.

[0287] It should be understood that the division of modules in the embodiments of the present application is illustrative, merely a logical function division. In actual implementation, there may be other division methods. In addition, in each embodiment of the present application, each functional module can be integrated in a processor, or can exist separately physically, or two or more modules can be integrated in one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

[0288] Figure 15 is another schematic block diagram of the communication device 1500 provided by the embodiments of the present application.

[0289] The device 1500 may be a chip system, or may also be a device configured with a chip system for implementing the methods described in the above method embodiments. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0290] As Figure 15 shown, the device 1500 may include a processor 1510, which may be used to execute computer programs or instructions in a memory to implement Figure 8 the steps performed by a network device or a terminal in the method embodiments shown.

[0291] Optionally, the device 1500 further includes a communication interface 1520. Among them, the communication interface 1520 may be used to communicate with other devices through a transmission medium, so that the device 1500 can communicate with other devices. The communication interface 1520 may be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of implementing a transceiver function. The processor 1510 may use the communication interface 1520 to input and output data, and is used to implement Figure 8 the methods described in the corresponding embodiments. Specifically, the device 1500 may be used to implement the functions of a network device or a terminal in the above method embodiments.

[0292] 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. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be electrical, mechanical, or other forms, for information interaction between devices, units, or modules. The processor 1510 may cooperate with the memory 1530. The processor 1510 may execute the program instructions stored in the memory 1530. At least one of the at least one memories may be included in the processor.

[0293] 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 may be electrical, mechanical, or other forms, for information interaction between devices, units, or modules. The processor 1510 may cooperate with the memory 1530. In the embodiments of the present application, 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 Figure 15 it is connected by a bus 1540 between the processor 1510, communication interface 1520, and memory 1530. The bus 1540 is in Figure 15is represented by a thick line. The connection manners between other components are only for illustrative purposes and are not restrictive. The bus can be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 15 it is only represented by a thick line in the figure, but it does not mean that there is only one bus or one type of bus.

[0294] Figure 16 is a schematic structural diagram of a communication device 1600 provided by an embodiment of the present application.

[0295] The communication device 1600 can be, for example, a network device or a terminal. The device 1600 can be used to implement Figure 8 the methods executed by the network device or the terminal in the illustrated embodiments. Logically, the device 1600 includes multiple parts, such as a processor 1610, a memory 1620, and a signal transceiver unit 1630, which are used to implement communication and signaling interaction with network devices and terminals. Among them, a computer program or instruction is stored in the memory 1620. When the device 1600 executes the above computer program or instruction, it can implement Figure 8 the methods shown. 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 through the antenna 1633, and the transmitter 1631 can be used to send information through the antenna 1633.

[0296] Figure 17 is another schematic structural diagram of a communication device 1700 provided by an embodiment of the present application.

[0297] The communication device 1700 can be, for example, a terminal or a network device. The device 1700 can be used to implement Figure 8The method described in the illustrated embodiment. The device 1700 logically includes multiple parts, such as a processor 1701, a memory 1702, and a signal transceiver unit 1703. Among them, the memory 1702 can be used to store a computer program (which can also be referred to as code or instruction). The signal transceiver unit 1703 is used to implement communication and signaling interaction between the network device and the terminal, signal amplification, etc. The signal transceiver unit 1703 includes a transmitter 1703a, a receiver 1703b, and an antenna 1703c. In the antenna 1703c, a square represents a digital channel, and F in the square is the digital precoding weight. A phase shifter (a circle with a slanted arrow) represents an analog channel, which is connected to one or more antenna elements. That is, in practice, one phase shifter can control multiple antenna elements, or there can be a cross-connection between the phase shifter and the antenna elements.

[0298] This application also provides a computer program product, which includes: a computer program (which can also be referred to as code or instruction), and when the computer program is run, it can implement Figure 8 the steps performed by the network device or the steps performed by the terminal in the method described in the illustrated embodiment.

[0299] This application also provides a computer-readable storage medium, which stores a computer program (which can also be referred to as code or instruction). When the computer program is run, it can implement Figure 8 the steps performed by the network device or the steps performed by the terminal in the method described in the illustrated embodiment.

[0300] An embodiment of this application provides a communication system, which includes the network device and the terminal as described above.

[0301] It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method embodiments may be completed by the integrated logic circuit in the hardware of the processor or instructions in software form. The above-mentioned processor may 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, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0302] 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 ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (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 but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus 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.

[0303] As used in this specification, terms such as "unit" and "module" may be used to represent computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. The units and modules in the embodiments of the present application have the same meaning and may be used interchangeably.

[0304] Those of ordinary skill in the art can realize that the various illustrative logical blocks and steps described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application. In 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, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be electrical, mechanical, or other forms.

[0305] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0306] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0307] 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 (programs) are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that includes one or more integrated available media. The available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as digital video discs (DVDs)), or semiconductor media (such as solid state disks (SSDs)), etc.

[0308] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the technology, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0309] As described above, the above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A signal transmission method, characterized in that, Including: Transmitting a plurality of Synchronization Signal Blocks (SSBs); Transmitting a plurality of first-type signals, where the plurality of first-type signals correspond one-to-one with 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 with the plurality of second-type signals, the time slots occupied by the plurality of first-type signals are the same, and the frequency-domain resources occupied by the plurality of first-type signals are different.

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

3. The method according to claim 2, wherein 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 a first frequency-domain reference is predefined or indicated by first indication information carried in the first SSB.

5. The method according to claim 4, wherein 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, the second indication information 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 start symbol of the first signal are predefined or indicated by 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, characterized in 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 SSB period.

11. The method according to claim 10, wherein 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, 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 plurality of first-type signals, and the second signal is the second-type signal scheduled by the first signal among the plurality of 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 a first symbol and a second symbol, and 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 plurality of first-type signals, and the second signal is the second-type signal scheduled by the first signal among the plurality of 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 plurality of 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 time slots occupied by the plurality of first-type signals are the same, and the frequency-domain resources occupied by the plurality of first-type signals are different.

15. The method according to claim 14, characterized in that, 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, and 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, wherein 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 granularities of the first DMRS and the second DMRS are 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, and 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, and when the computer program or instructions are executed by a computer, the method described in any one of claims 1 to 13 is implemented, or the method described in any one of claims 14 to 26 is implemented.

30. A computer program product, characterized in that, The computer program product includes instructions, and when the instructions are run by a computer, the method described in any one of claims 1 to 13 is implemented, or the method described in any one of claims 14 to 26 is implemented.

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