Communication method and device

Abstract

The invention discloses a communication method and device, and relates to the field of communication. The method comprises the following steps: acquiring a synchronization signal block; transmitting the synchronization signal block; the synchronization signal block comprises at least one type of first signal, the first signal is modulated by a single carrier modulation technology, and in time domain symbols bearing the first signal, each time domain symbol bears one type of first signal. According to the invention, the coverage of the synchronization signal block can be improved or enhanced, and the difference between the coverage of the synchronization signal block and the coverage of the data signal is reduced.

Description

Technical Field

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

[0002] In the new radio (NR) technology of the fifth generation (5G) mobile communication system, the downlink signal of the communication system can be transmitted in the form of a beam. Among them, the signal providing downlink synchronization in the form of a beam can be called a synchronization signal. For example, the synchronization signal transmitted by a base station can be a synchronization signal block (SSB), and the SSB can also be called a synchronization signal / physical broadcast channel block (SS / PBCH block).

[0003] Currently, with the evolution of cellular communication towards high frequencies, the gap between the coverage ranges of the physical downlink shared channel (PDSCH) and the SSB is gradually widening. Summary of the Invention

[0004] This application provides a communication method and apparatus, which can improve or enhance the coverage range of the synchronization signal block, and thus reduce the gap between the coverage ranges of the synchronization signal block and the data signal.

[0005] In a first aspect, this application provides a communication method, the method including: obtaining a synchronization signal block; transmitting the synchronization signal block; the synchronization signal block includes at least one first signal, the first signal is modulated by a single-carrier modulation technique, and in the time-domain symbol carrying the first signal, each time-domain symbol carries one type of the first signal.

[0006] Exemplarily, the method described in the first aspect can be applied to a network device, such as a base station. For example, the method is executed by the network device or by a device (such as a chip) built in the network device.

[0007] In this communication method, the first signal in the synchronization signal block is modulated by single-carrier modulation technology. Among the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal (or does not carry other types of signals), which can reduce or eliminate the frequency-domain overlapping part between the first signal and other signals, making the first signal suitable for modulation by single-carrier modulation technology. Modulating the first signal by single-carrier modulation technology can reduce the peak-to-average power ratio (PAPR) of the first signal, increase the transmission power of the power amplifier (PA), and thus improve or enhance the coverage range of the first signal. By improving or enhancing the coverage range of the first signal (i.e., improving the coverage range of the synchronization signal block), the gap between the coverage ranges of the synchronization signal block and data signals (such as PDSCH) can be reduced.

[0008] In a possible design, the first signal includes a physical broadcast channel.

[0009] For example, the synchronization signal block can be entirely a physical broadcast channel. The physical broadcast channel is the first signal.

[0010] Or, in another possible design, the first signal includes a physical broadcast channel, and also includes a primary synchronization signal and / or a secondary synchronization signal.

[0011] For example, the synchronization signal block can include a physical broadcast channel, a primary synchronization signal, and a secondary synchronization signal, and all three signals are the first signal. Or, the synchronization signal block can include a physical broadcast channel and a primary synchronization signal, and both signals are the first signal. Or, the synchronization signal block can include a physical broadcast channel and a primary and secondary synchronization signal, and both signals are the first signal.

[0012] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by multi-carrier modulation technology.

[0013] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0014] Or, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0015] Or, in yet another possible design of this implementation, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0016] This application does not limit the signal types of the synchronization signal block.

[0017] In a possible design, the first signal in any of the above designs further includes a demodulation reference signal of a physical broadcast channel.

[0018] For example, the demodulation reference signal (DMRS) of the physical broadcast channel (PBCH) can be regarded as an independent signal. Exemplarily, the DMRS of the PBCH can be used as a first signal and modulated in the same manner as the aforementioned other first signals (such as the PBCH) to implement a synchronization signal block.

[0019] Alternatively, in some other possible designs, the DMRS of the PBCH can also be used as an independent signal and carried by at least one separate time-domain symbol. The DMRS of the PBCH can be directly mapped without modulation. It should be understood that when the DMRS of the PBCH is directly mapped without modulation, the DMRS of the PBCH is neither the first signal nor the second signal.

[0020] In another possible design, the DMRS of the PBCH can be carried in the same time-domain symbol as the PBCH, or rather, the time-domain symbol carrying the PBCH can also carry the DMRS of the PBCH. For example, the DMRS of the PBCH can be mapped in a comb-like manner among the PBCHs. For example, in some examples, among the subcarriers corresponding to the time-domain symbol where the PBCH is located, one subcarrier out of every 4 consecutive subcarriers carries the DMRS corresponding to the PBCH, and the remaining subcarriers are the subcarriers occupied by the PBCH.

[0021] Optionally, in this design, when the time-domain symbol carrying the PBCH also carries the DMRS of the PBCH, the DMRS of the PBCH can be modulated together with the PBCH by the DFT-s-OFDM technique, or the DMRS of the PBCH can also be directly mapped without modulation. It should be understood that when the DMRS of the PBCH is directly mapped without modulation, the DMRS of the PBCH is neither the first signal nor the second signal.

[0022] In this design, the PBCH and the DMRS of the PBCH can be regarded as a whole and a synchronization signal block can be implemented in the manner described in the foregoing embodiments. The terminal device can perform channel estimation based on the DMRS of the PBCH.

[0023] In yet another possible design, the synchronization signal block may not carry the DMRS of the PBCH.

[0024] In this design, the synchronization signal block does not include the DMRS of the PBCH. The terminal device can complete the PBCH channel estimation by means of the PSS and / or SSS, or use the PSS and / or SSS as the reference signal of the PBCH for channel estimation.

[0025] This design can reduce the signaling overhead of the DMRS part of the PBCH and improve the PBCH performance.

[0026] In a possible design, the signals in the synchronization signal block are constellation modulated by the quadrature phase shift keying method or the pi / 2 binary phase shift keying method.

[0027] In this design, when the first signal is constellation modulated by the pi / 2BPSK method, the peak-to-average ratio can be further reduced and the coverage range of the first signal can be increased.

[0028] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

[0029] In this design, when the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain, for any two different signals, the RBs occupied by these two signals on a time-domain symbol are the same, which can make the result of the PBCH channel estimation according to the PSS and / or SSS more accurate.

[0030] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same serial numbers.

[0031] When the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same serial numbers (or called numbers), the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain. On the basis that the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain, further having the same number of subcarriers and the same serial numbers of the occupied subcarriers can further improve the PBCH channel estimation performance.

[0032] Alternatively, in another possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to the subcarriers with different serial numbers is less than a first threshold.

[0033] When the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold, the signals carried by different time-domain symbols may occupy the same number of RBs in the frequency domain or may occupy different numbers of RBs. When the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold, the number of misaligned RBs can also be controlled within a range less than the first threshold.

[0034] In this design, when the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold, the channel estimation performance of the PBCH can be further improved.

[0035] Alternatively, in another possible design, among the time-domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols in the frequency domain is less than the second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold.

[0036] In this design, when the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols in the frequency domain is less than the second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold, the channel estimation performance of the PBCH can be further improved.

[0037] In a second aspect, the present application provides a communication device, which has the function of implementing the method described in the first aspect above. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functions of the method described in the first aspect above. For example, an acquisition unit, a transmission unit, etc.

[0038] Among them, the acquisition unit is used to acquire the synchronization signal block.

[0039] The transmission unit is used to transmit the synchronization signal block.

[0040] The synchronization signal block includes at least one first signal, and the first signal is modulated by a single-carrier modulation technique. Among the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal.

[0041] In a possible design, the first signal includes a physical broadcast channel.

[0042] Or, in another possible design, the first signal includes a physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

[0043] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0044] In a possible design of this implementation manner, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0045] Alternatively, in another possible design of this implementation manner, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0046] Or, in yet another possible design of this implementation manner, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0047] In a possible design, the first signal in any of the above designs further includes a demodulation reference signal of the physical broadcast channel.

[0048] In a possible design, the signals in the synchronization signal block are constellation - modulated by quadrature phase - shift keying or pi / 2 binary phase - shift keying.

[0049] In a possible design, among the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of resource blocks in the frequency domain.

[0050] In a possible design, among the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain and have the same sequence numbers.

[0051] Or, in another possible design, among the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than a first threshold.

[0052] Or, in yet another possible design, among the time - domain symbols carrying the synchronization signal block, the difference in the number of sub - carriers occupied by the signals carried by different time - domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than a first threshold.

[0053] In a third aspect, the present application further provides a communication device, including: a processor configured to execute computer instructions stored in a memory, and when the computer instructions are executed, causing the device to perform the method described in the first aspect or any possible design of the first aspect.

[0054] In a fourth aspect, the present application further provides a communication device, including: a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit and perform the method described in the first aspect or any possible design of the first aspect.

[0055] Exemplarily, in the third aspect and the fourth aspect, the processor is configured to perform the method described in the first aspect or any possible design of the first aspect.

[0056] The communication device described in the second to fourth aspects above may be a network device, such as a base station, or a device (such as a chip) built into the network device.

[0057] In a fifth aspect, the present application further provides a computer-readable storage medium, including: computer software instructions, or referred to as instructions; when the computer software instructions are run, the method described in the first aspect or any possible design of the first aspect is implemented. For example, when the computer software instructions are run in a network device or a device (such as a chip) built into the network device, the network device implements the method described in the first aspect or any possible design of the first aspect.

[0058] It can be understood that for the beneficial effects that can be achieved by the second to fifth aspects provided above, reference can be made to the beneficial effects in the first aspect and any of its possible designs, which will not be elaborated here.

[0059] In a sixth aspect, the present application provides a communication method, the method including: receiving a synchronization signal block, the synchronization signal block including at least one first signal, the first signal being modulated by a single-carrier modulation technique, and in the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal; synchronizing according to the synchronization signal block.

[0060] Exemplarily, the method described in the sixth aspect can be applied to a terminal device, such as: the method is executed by a terminal device, or by a device (such as a chip) built into the terminal device.

[0061] In this communication method, the first signal in the synchronization signal block is modulated by a single-carrier modulation technique, and in the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal (or does not carry other types of signals), which can reduce or eliminate the frequency-domain cross part between the first signal and other signals, making the first signal suitable for modulation by the single-carrier modulation technique. Modulating the first signal by the single-carrier modulation technique can reduce the peak-to-average power ratio (PAPR) of the first signal, increase the transmission power of the power amplifier (PA), and further improve or enhance the coverage range of the first signal. By improving or enhancing the coverage range of the first signal (i.e., improving the coverage range of the synchronization signal block), the gap between the coverage ranges of the synchronization signal block and data signals (such as PDSCH) can be reduced.

[0062] In a possible design, the first signal includes a physical broadcast channel.

[0063] Alternatively, in another possible design, the first signal includes a physical broadcast channel and includes a primary synchronization signal and / or a secondary synchronization signal.

[0064] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0065] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0066] Or, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0067] Or, in yet another possible design of this implementation, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0068] In a possible design, the first signal in any of the above designs further includes a demodulation reference signal of the physical broadcast channel.

[0069] In a possible design, the method further includes: performing channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

[0070] In a possible design, the signals in the synchronization signal block are constellation-modulated by quadrature phase shift keying or pi / 2 binary phase shift keying.

[0071] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

[0072] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same sequence number.

[0073] Or, in another possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0074] Or, in yet another possible design, among the time-domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0075] The beneficial effects of the above sixth aspect can refer to the beneficial effects of the first aspect and will not be elaborated here.

[0076] In a seventh aspect, the present application provides a communication device, which has the function of implementing the method described in the sixth aspect above. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the function of the method described in the sixth aspect above. For example, a receiving unit, a processing unit, etc.

[0077] Among them, the receiving unit is used to receive a synchronization signal block, and the synchronization signal block includes at least one first signal. The first signal is modulated by a single-carrier modulation technique. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal.

[0078] The processing unit is used to perform synchronization according to the synchronization signal block.

[0079] In a possible design, the first signal includes a physical broadcast channel.

[0080] Alternatively, in another possible design, the first signal includes a physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

[0081] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0082] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0083] Alternatively, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0084] Or, in yet another possible design of this implementation, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0085] In a possible design, the first signal described in any of the above designs further includes a demodulation reference signal of the physical broadcast channel.

[0086] In a possible design, the processing unit is further used to perform channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

[0087] In a possible design, the signals in the synchronization signal block are constellation-modulated by an orthogonal phase shift keying method or a pi / 2 binary phase shift keying method.

[0088] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

[0089] In a possible design, in the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same serial numbers.

[0090] Alternatively, in another possible design, in the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than a first threshold.

[0091] Or, in yet another possible design, in the time-domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than a first threshold.

[0092] In an eighth aspect, the present application further provides a communication device, including: a processor configured to execute computer instructions stored in a memory, and when the computer instructions are executed, causing the device to perform the method described in the sixth aspect or any possible design of the sixth aspect.

[0093] In a ninth aspect, the present application further provides a communication device, including: a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit and perform the method described in the sixth aspect or any possible design of the sixth aspect.

[0094] Exemplarily, in the eighth aspect and the ninth aspect, the processor is configured to perform the method described in the sixth aspect or any possible design of the sixth aspect.

[0095] The communication device described in the above seventh aspect to ninth aspect may be a terminal device or a device (such as a chip) built into the terminal device.

[0096] The application further provides a computer-readable storage medium, including: computer software instructions, or referred to as instructions; when the computer software instructions are run, causing the method described in the sixth aspect or any possible design of the sixth aspect to be implemented. For example, when the computer software instructions run in a terminal device or a device (such as a chip) built into the terminal device, causing the terminal device to implement the method described in the sixth aspect or any possible design of the sixth aspect.

[0097] It can be understood that for the beneficial effects that can be achieved by the above seventh aspect to tenth aspect, reference can be made to the beneficial effects in the sixth aspect and any of its possible designs, which will not be elaborated here.

[0098] In an eleventh aspect, the present application provides a synchronization signal block, which includes at least one type of first signal. The first signal is modulated by a single-carrier modulation technique. Among the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal.

[0099] In a possible design, the first signal includes a physical broadcast channel.

[0100] Alternatively, in another possible design, the first signal includes a physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

[0101] Optionally, in some implementations, the synchronization signal block further includes at least one type of second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0102] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0103] Alternatively, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0104] Or, in yet another possible design of this implementation, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0105] In a possible design, the first signal described in any of the above designs further includes a demodulation reference signal for the physical broadcast channel.

[0106] In a possible design, the signals in the synchronization signal block are constellation-modulated by an orthogonal phase shift keying method or a pi / 2 binary phase shift keying method.

[0107] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

[0108] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the serial numbers are the same.

[0109] Alternatively, in another possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to the subcarriers with different serial numbers is less than a first threshold.

[0110] Alternatively, in yet another possible design, in the time-domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than a first threshold.

[0111] The beneficial effects of the eleventh aspect described above can refer to the beneficial effects of the first aspect and will not be elaborated here.

[0112] In a twelfth aspect, the present application further provides a communication device, including: a transceiver unit and a processing unit. The transceiver unit can be used to transmit and receive information, or to communicate with other network elements. The processing unit can be used to process data. The device can implement the methods described in the first aspect and any of its possible designs, or the methods described in the sixth aspect and any of its possible designs through the transceiver unit and the processing unit.

[0113] In a thirteenth aspect, the present application further provides a computer program product, which can implement the methods described in the first aspect and any of its possible designs, or the methods described in the sixth aspect and any of its possible designs when executed.

[0114] In a fourteenth aspect, the present application further provides a chip system, which includes one or more interface circuits and one or more processors; the interface circuits and the processors are interconnected by lines; the processors receive and execute computer instructions from the memory of the electronic device through the interface circuits to implement the methods described in the first aspect and any of its possible designs, or the methods described in the sixth aspect and any of its possible designs.

[0115] In a fifteenth aspect, the present application further provides a communication system, including: a network device and a terminal device; the network device executes the methods described in the first aspect and any of its possible designs; the terminal device executes the methods described in the sixth aspect and any of its possible designs.

[0116] In a sixteenth aspect, the present application further provides a network device, which can be used to implement the methods described in the first aspect and any of its possible designs.

[0117] In a seventeenth aspect, the present application further provides a terminal device, which can be used to implement the methods described in the sixth aspect and any of its possible designs.

[0118] It can be understood that the beneficial effects that can be achieved by the twelfth aspect to the seventeenth aspect provided above can refer to the beneficial effects described in the first aspect, the sixth aspect, the eleventh aspect, etc., and will not be elaborated here. Description of the Drawings

[0119] Figure 1A schematic diagram of an SSB in an NR communication system;

[0120] Figure 2 A schematic diagram showing the coverage range difference between an SSB and a PDSCH in different frequency bands;

[0121] Figure 3 A schematic diagram showing the composition of a communication system provided by an embodiment of the present application;

[0122] Figure 4 A schematic diagram showing the composition of a network device provided by an embodiment of the present application;

[0123] Figure 5 A schematic diagram showing the flowchart of a communication method provided by an embodiment of the present application;

[0124] Figure 6 A schematic diagram showing the composition of a synchronization signal block provided by an embodiment of the present application;

[0125] Figure 7 A schematic diagram showing the flowchart of DFT-s-OFDM modulation provided by an embodiment of the present application;

[0126] Figure 8 A schematic diagram showing the composition of another synchronization signal block provided by an embodiment of the present application;

[0127] Figure 9 A schematic diagram showing the composition of yet another synchronization signal block provided by an embodiment of the present application;

[0128] Figure 10 A schematic diagram showing the composition of yet another synchronization signal block provided by an embodiment of the present application;

[0129] Figure 11 A schematic diagram showing the composition of yet another synchronization signal block provided by an embodiment of the present application;

[0130] Figure 12 A schematic diagram showing the subcarrier mapping relationship of a synchronization signal block provided by an embodiment of the present application;

[0131] Figure 13 A schematic diagram showing the structure of a communication device provided by an embodiment of the present application;

[0132] Figure 14 A schematic diagram showing another structure of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0133] In the new radio (NR) technology of the fifth generation (5G) mobile communication system, the downlink signal of the communication system can be transmitted in the form of a beam. Among them, the signal providing downlink synchronization in the form of a beam can be called a synchronization signal. For example, the synchronization signal transmitted by the base station can be a synchronization signal block (SSB), and the SSB can also be called a synchronization signal / physical broadcast channel block (SS / PBCH block), which is referred to as a synchronization signal block in the following description.

[0134] For example, Figure 1 is a schematic diagram of an SSB in the NR communication system. As Figure 1 shown, in the time domain (abbreviated as the time domain), an SSB can occupy 4 consecutive orthogonal frequency division multiplexing (OFDM) symbols. In the frequency domain (abbreviated as the frequency domain), an SSB can occupy 240 consecutive subcarriers, and these 240 subcarriers are numbered from 0 to 239. The OFDM symbol numbers corresponding to the 4 OFDM symbols occupied by an SSB can be 0, 1, 2, and 3 in sequence.

[0135] The first OFDM symbol (i.e., the OFDM symbol numbered 0) can carry the primary synchronization signal (PSS). Among them, the subcarriers numbered 0 to 55 and those numbered 183 to 239 are set to 0; the subcarriers numbered 56 to 182 are the subcarriers occupied by the PSS.

[0136] The second and fourth OFDM symbols (i.e., the OFDM symbols numbered 1 and 3) can carry the physical broadcast channel (PBCH). Among the subcarriers numbered 0 to 239, one subcarrier out of every 4 consecutive subcarriers is the demodulation reference signal (DMRS) corresponding to the PBCH, and the remaining subcarriers are the subcarriers occupied by the PBCH.

[0137] The 3rd OFDM symbol (i.e., the OFDM symbol numbered 2) can carry the secondary synchronization signal (SSS) and the PBCH. Among them, the subcarriers numbered 56 to 182 are the subcarriers occupied by the SSS; the subcarriers numbered 48 to 55 and the subcarriers numbered 183 to 191 are set to 0; among the subcarriers numbered 0 to 47 and the subcarriers numbered 192 to 239, one subcarrier out of every 4 consecutive subcarriers is the DMRS corresponding to the PBCH, and the remaining subcarriers are the subcarriers occupied by the PBCH.

[0138] In other words, in the current SSB structure, the SSB occupies 4 consecutive OFDM symbols in the time domain and 20 resource blocks (RBs) or 240 subcarriers in the frequency domain. Among them, the PSS occupies 127 subcarriers or resource elements in the 1st OFDM symbol of the SSB; the SSS occupies 127 subcarriers in the 3rd OFDM symbol of the SSB; the PBCH and the DMRS of the PBCH occupy 576 subcarriers in the 2nd OFDM symbol, the 3rd OFDM symbol, and the 4th OFDM symbol.

[0139] Currently, cellular communication is gradually evolving towards high frequencies, that is, the frequency bands used in cellular communication are gradually increasing to obtain richer wireless spectrum resources, faster signal transmission speeds, or lower latencies. However, as cellular communication evolves towards high frequencies, the gap between the coverage ranges of broadcast signals (such as SSBs) and data signals (such as the physical downlink shared channel (PDSCH)) is gradually widening, affecting the communication performance of the communication system.

[0140] For example, Figure 2 is a schematic diagram of the coverage range differences between the SSB and the PDSCH at different frequency bands. As Figure 2 shown, taking the frequency of frequency band F1 being less than that of frequency band F2 as an example, the number of antennas of array 1 used in the communication system using frequency band F1 is lower than the number of antennas of array 2 used in the communication system using frequency band F2. The gap (GAP) between the coverage range of the SSB beam (abbreviation: SSB coverage range) and the coverage range of the PDSCH beam (abbreviation: PDSCH coverage range) can be defined as the area range that the PDSCH can cover but the SSB cannot cover. In Figure 2 the GAP between the SSB coverage range and the PDSCH coverage range in the communication system using frequency band F2 is greater than the GAP between the SSB coverage range and the PDSCH coverage range in the communication system using frequency band F1.

[0141] Under this background art, the present application provides a communication method. In this method, a network device can obtain and send a synchronization signal block, and a terminal device can receive the synchronization signal block and perform synchronization based on the received synchronization signal block. Among them, the synchronization signal block includes at least one first signal, the first signal is modulated by a single-carrier modulation technique, and in the time-domain symbol carrying the first signal, each time-domain symbol carries one type of the first signal.

[0142] This method can utilize the single-carrier modulation technique to reduce the peak-to-average power ratio (PAPR) of the first signal in the synchronization signal block, increase the transmission power of the power amplifier (PA), improve or enhance the coverage range of the first signal, and thus reduce the gap between the coverage ranges of the synchronization signal block and the PDSCH.

[0143] Exemplarily, Figure 3 shows a schematic diagram of the composition of a communication system provided by an embodiment of the present application. The communication method provided by the embodiment of the present application can be applied to Figure 3 the shown communication system. As Figure 3 shown, the communication system may include: a network device 310 and a terminal device 320.

[0144] Among them, the network device 310 can be referred to as an access network device or a radio access network (RAN) device, or a next-generation radio access network device. For example, the network device 310 can be a base station, or an access point, or a device in the access network that communicates with wireless terminals through one or more sectors on the air interface. Different access network devices can communicate through the Xn interface.

[0145] Optionally, in the embodiments of the present application, the network device 310 may include various forms of macro base stations, micro base stations (also known as small stations), etc. For example, the network device 310 may include: a base station in Wideband Code Division Multiple Access (WCDMA) or Long Term Evolution (LTE), a next generation node B (gNB), a next generation evolved node B (Ng-eNB), a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wifi) access point (AP), a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc.

[0146] In some deployments, the gNB may include a centralized unit (CU) and a distributed unit (DU). The gNB may also include an active antenna unit (AAU). The CU implements part of the functions of the gNB, and the DU implements part of the functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing, and functions related to active antennas.

[0147] The terminal device 320 may also be referred to as a user equipment. In some examples, the terminal device 320 may be an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a remote station, a remote terminal, a mobile terminal (MT), a user terminal, a wireless communication device, a user agent, a user device, a target terminal, etc., which are not limited herein.

[0148] In the embodiments of the present application, the terminal device 320 may be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and / or other service data connectivity to a user, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. For example, the terminal device 320 may be a mobile phone, a tablet (pad), a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G mobile communication system, or a terminal in a future evolved network, etc. The present application does not limit the specific product form of the terminal device 320.

[0149] Optionally, Figure 3The communication system shown may be a WCDMA system, an LTE system, an advanced long-term evolution LTE-A (LTE advanced) system, an LTE frequency division duplex (FDD) system, a universal mobile telecommunication system (UMTS), a 5G NR system, and other wireless communication systems applying OFDM technology, etc. Or, it may also be a future 6th generation mobile communication technology (6G) network communication system, or other future communication systems. The specific type of this communication system is not limited in this application.

[0150] In addition, the foregoing communication system is only for more clearly illustrating the technical solutions of the embodiments of this application, and does not constitute a limitation to the technical solutions provided by the embodiments of this application. For example, other devices may also be included in this communication system, such as: core network devices, network control devices, etc. The network control device may be an operation administration and maintenance (OAM) system, also known as a network management system.

[0151] Exemplarily, Figure 4 The composition schematic diagram of a network device provided by an embodiment of this application is shown. This network device may be the network device 310 in the foregoing communication system, such as a base station. As Figure 4 shown, the network device may include: at least one processor 41, a memory 42, a communication interface 43, and a bus 44.

[0152] The processor 41 is the control center of the network device, which may be a single processor or a collective term for multiple processing elements. For example, the processor 41 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may also be one or more integrated circuits configured to implement the embodiments of this application, such as: one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), etc.

[0153] Among them, the processor 41 can execute various functions of the network device by running or executing software programs stored in the memory 42 and calling the data stored in the memory 42. For example, it can execute the steps performed by the network device (such as a base station) in the communication method provided in the embodiments of the present application.

[0154] In a specific implementation, as an embodiment, the processor 41 may include one or more CPUs, for example Figure 4 the CPU0 and CPU1 shown in

[0155] In a specific implementation, as an embodiment, the network device may include multiple processors, for example Figure 4 the processor 41 and the processor 45 shown in

[0156] Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). Here, the processor may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0157] The memory 42 may store the software program of the method steps executed by the network device and be controlled by the processor 41 for execution. The memory 42 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0157] The memory 42 may exist independently and be connected to the processor 41 through the bus 44. Alternatively, the memory 42 may also be integrated with the processor 41, which is not limited herein.

[0158] The communication interface 43 uses any transceiver or other device for communicating with other devices or communication networks. The communication interface 43 may be an Ethernet interface, a radio access network (RAN) interface, a wireless local area network (WLAN) interface, etc. The communication interface 43 may include a receiving unit to implement a receiving function, and a sending unit to implement a sending function.

[0159] The bus 44 may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0160] Although attached Figure 4 The bus 44 is used in the embodiment, but it is understandable that the bus can also be replaced by other forms of connection relationships and is not limited to the bus itself.

[0161] Optionally, in the embodiment of the present application, the composition of the above terminal device can also refer to Figure 4 As shown, or the terminal device may also include Figure 4 More or fewer components may be shown, but this is not intended to be limiting.

[0162] The following is an exemplary description of the communication method provided in the embodiment of the present application. The processing described below as being performed by a single execution subject may also be divided into being performed by multiple execution subjects, which may be logically and / or physically separated. It should also be understood that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0163] It should be noted that in the description of the embodiments of the present application, words such as "first" and "second" are only used for distinguishing descriptions and are not used for specifically limiting a certain feature. That is, the first or the second may include more content, rather than being limited to a specific concept. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may indicate the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. At least one means one or more; a plurality means two or more. The embodiments of the present application may execute fewer steps than all the steps, or execute more steps, without limitation. "At least one of the following" or its similar expressions are used to represent any combination of the items listed; for example, at least one of A, B, and (or) C may represent the following situations: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, A and C exist simultaneously, and A, B, and C exist simultaneously, where A, B, and C may be single or multiple.

[0164] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the present invention application.

[0165] Figure 5 The flowchart of the communication method provided by the embodiment of the present application is shown. As Figure 5 shown, the communication method may include S501 - S502.

[0166] Exemplarily, Figure 5 In the process shown, the steps executed by the network device may specifically be executed by the network device or a device (such as a chip) built into the network device. The steps executed by the terminal device may specifically be executed by the terminal device or a device (such as a chip) built into the terminal device.

[0167] S501. The network device obtains a synchronization signal block.

[0168] Exemplarily, the network device may be a base station, and the synchronization signal block may refer to the synchronization signal that the base station needs to send, such as what is called an SSB.

[0169] In the embodiments of the present application, the synchronization signal block includes at least one first signal, the first signal is modulated by single - carrier modulation technology, and in the time - domain symbol carrying the first signal, each time - domain symbol carries one type of the first signal.

[0170] Among them, the single-carrier modulation technology may refer to the discrete Fourier transform spreading OFDM (DFT-s-OFDM) technology. The DFT-s-OFDM technology is a derivative technology based on the OFDM technology. It can perform DFT processing on the subcarriers used by users, convert them from the time domain to the frequency domain, and then perform OFDM modulation on the frequency-domain signals of users. In this way, the signals of each user are converted back to the time domain for transmission together.

[0171] Exemplarily, Figure 6 shows a schematic diagram of the composition of a synchronization signal block provided by an embodiment of the present application. As Figure 6 shown, in a possible design, the synchronization signal block may include a PSS, an SSS, and a PBCH. The PSS may carry the cell identifier, such as the physical cell ID (PCI). The SSS may carry part of the system frame number (SFN) information. The PBCH may carry the main information block (MIB) information, and the MIB information carries the parameter set used for the transmission of the system information block (SIB) 1 and the distribution of scheduling control resources. The SIB is a signaling for broadcasting cell-level information, and it contains cell-specific parameter information, such as the cell ID, cell configuration, etc. The PSS, SSS, and PBCH can all be used as the first signals modulated by the single-carrier modulation technology. For each type of first signal, in the time-domain symbol carrying this type of first signal, each time-domain symbol carries this type of signal. For example, in the time-domain symbols carrying the PBCH (such as the 2nd and 4th time-domain symbols), each time-domain symbol only carries the PBCH and does not carry the PSS and SSS.

[0172] In this design, the synchronization signal block can be obtained by the network device modulating the information that the PSS, SSS, and PBCH need to carry respectively based on the DFT-s-OFDM technology.

[0173] For example, Figure 7 shows a schematic diagram of the DFT-s-OFDM modulation process provided by an embodiment of the present application. As Figure 7As shown, the process of DFT-s-OFDM modulation may include modulation, discrete Fourier transformation (DFT), subcarrier (SC) mapping, inverse fast Fourier transform (IFFT) & + CP. "&" represents "and", and "+CP" represents adding a cyclic prefix.

[0174] Among them, the modulation part / link / module refers to encoding, scrambling, and constellation modulation of data (such as the information carried by the first signal), and a number of complex symbols can be obtained. Channel coding of the data can increase redundancy and improve the channel fault tolerance ability. Scrambling can improve the randomness of the signal, reduce the correlation of the signal, and reduce the peak-to-average ratio of the signal, making the signal easier to transmit.

[0175] The DFT part refers to performing DFT processing on the complex symbols obtained by the modulation part.

[0176] The SC mapping part refers to performing subcarrier mapping on the complex symbols after DFT processing.

[0177] The IFFT&+CP part refers to performing IFFT processing on the symbols after SC mapping, converting the signal in the frequency domain into a signal in the time domain, and adding a cyclic prefix (CP) in front of the time-domain signal to increase the system's resistance to multipath interference.

[0178] Taking the PBCH carrying the MIB information as an example, the network device can Figure 7 modulate the MIB information based on the DFT-s-OFDM technology according to the process shown, and obtain the PBCH. For example, in Figure 7 the modulation part shown, the network device can encode, scramble, and constellation modulate the MIB information to obtain a number of complex symbols. In Figure 7 the DFT part shown, the network device can perform DFT processing on the aforementioned number of complex symbols. In Figure 7 the SC mapping part shown, the network device can perform subcarrier mapping on the complex symbols after DFT processing and map them to the frequency domain. In Figure 7 the IFFT&+CP part shown, the network device can perform IFFT processing and +CP processing on the symbols after SC mapping to obtain the PBCH.

[0179] Similarly, the network device can obtain the PSS and SSS respectively according to the process shown in Figure 7 and then obtain the synchronization signal block.

[0180] Optionally, after performing the above Figure 7 DFT-s-OFDM modulation process to obtain the synchronization signal block, the network device may further filter the synchronization signal block. For example, through an SSB filter, the synchronization signal block is converted into a single-sideband signal.

[0181] For the DFT-s-OFDM modulation process described above, reference can also be made to Section 38.211.6.3.1.4 of the Technical Specification (TS) of the 3rd Generation Partnership Project (3GPP), which will not be elaborated here.

[0182] S502. The network device sends a synchronization signal block.

[0183] Correspondingly, the terminal device receives the synchronization signal block.

[0184] Exemplarily, after modulating to obtain the synchronization signal block, the network device may perform antenna port mapping on the synchronization signal block and send it through the antenna.

[0185] It should be understood that the network device may send the synchronization signal block in a broadcast form, and the synchronization signal block may be broadcast at the physical layer. For example, the base station may send the synchronization signal block to at least one beam direction and complete the transmission of the synchronization signal block in all beam directions within a certain time duration (such as 5 milliseconds (ms)).

[0186] Exemplarily, the base station may use 20 ms (only as an example, it may also be other values) as a period and send a group of synchronization signal blocks including multiple beam directions every 20 ms. The synchronization signal blocks sent in multiple beam directions may cover the coverage area of the base station. For example, if the base station covers a circular area, the base station may send synchronization signal blocks to scan a 360-degree range every 20 ms. For example, the base station may send 8 synchronization signal blocks within 5 ms and send them to different beam directions.

[0187] For the terminal device, it may scan or detect the synchronization signal block sent by the network device after power-on or when it needs to re-connect to the network to perform downlink time and frequency synchronization. This process is also called cell search. Terminal devices located in different cells or different positions within a cell may detect one or more synchronization signal blocks.

[0188] S503. The terminal device synchronizes according to the synchronization signal block.

[0189] Exemplarily, after receiving the synchronization signal block, the terminal device can perform physical layer synchronization by receiving the synchronization signal block, so as to correctly connect and communicate with the network device. For example, the terminal device can perform functions such as cell search, timing synchronization, and initial access by receiving the synchronization signal block. The implementation logic of the terminal device based on the synchronization signal block will not be elaborated here and is not limited either.

[0190] It should be understood that after receiving the synchronization signal block, the terminal device can perform fast Fourier transform (FFT) and DFT processing on the synchronization signal block to achieve signal demodulation and data recovery. For example, the terminal device can restore the data carried by the PBCH, such as the MIB information. When the terminal device does not scan and receive the synchronization signal block, the above S503 may not exist.

[0191] In the communication method provided by the embodiments of the present application, the first signal in the synchronization signal block is modulated by single-carrier modulation technology. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal (or does not carry other types of signals), which can reduce or eliminate the frequency-domain cross part between the first signal and other signals, making the first signal suitable for modulation by single-carrier modulation technology. Modulating the first signal by single-carrier modulation technology can reduce the peak-to-average power ratio (PAPR) of the first signal, increase the transmission power of the power amplifier (PA), and thus improve or enhance the coverage range of the first signal. By improving or enhancing the coverage range of the first signal, the gap between the coverage ranges of the synchronization signal block and the data signal (such as PDSCH) can be reduced.

[0192] Among them, PAPR is used to describe the ratio between the peak power and the average power of a signal. Generally speaking, the lower the PAPR, the smaller the difference between the peak power and the average power of the signal, and the closer the signal is to the average power. This can reduce the output power fluctuation range of the power amplifier, lower the peak power of the signal, and thus reduce the power requirement of the power amplifier.

[0193] Taking the case where the first signal includes PBCH and the single - carrier modulation technique is DFT - s - OFDM technique as an example, in the current NR system, there is an overlapping part in the frequency domain between SSS and PBCH in the SSB (or called NR SSB). This means that the single - carrier characteristic in the frequency domain of DFT - s - OFDM is damaged, which will affect the PAPR of the time - domain signal, thus affecting the output power and efficiency of the PA and having an impact on the coverage range. For example, due to the overlapping part of SSS and PBCH in the frequency domain, it may cause the PAPR of the signal to rise and affect the coverage range. The embodiments of the present application can reduce or eliminate the overlapping part of SSS and PBCH in the frequency domain and use DFT - s - OFDM technique for modulation to improve the coverage range of the PBCH signal.

[0194] It should be noted that in the above - mentioned embodiments, only the design where the synchronization signal block includes PSS, SSS, and PBCH, and PSS, SSS, and PBCH are all used as the first signal is taken as an example for illustration. However, in more embodiments of the present application, there are more implementation manners for the synchronization signal block, which are exemplarily described below.

[0195] Exemplarily, in the embodiments of the present application, the synchronization signal block may include at least one of PSS, SSS, and PBCH.

[0196] For example, Figure 8 shows a schematic diagram of the composition of another synchronization signal block provided by the embodiments of the present application. In some examples, the synchronization signal block can refer to Figure 8 shown, or refer to Figure 6 shown in the foregoing embodiments. The synchronization signal block may occupy 4 time - domain symbols, and the first time - domain symbol may carry PSS, the third time - domain symbol may carry SSS, and the second time - domain symbol and the fourth time - domain symbol may both carry PBCH. That is, there are three signals in the synchronization signal block, namely PSS, SSS, and PBCH. Figure 6 and Figure 8 shown in the difference is that Figure 6 in the example given, the frequency - domain lengths of PSS and PBCH may be different, and the frequency - domain lengths of SSS and PBCH may be different. While Figure 8 in the example given, the frequency - domain lengths of PSS, SSS, and PBCH may be the same.

[0197] Another example, Figure 9 shows a schematic diagram of the composition of yet another synchronization signal block provided by the embodiments of the present application. In some other examples, the synchronization signal block can refer to Figure 9 shown in (a) of, or refer to Figure 9As shown in (b) thereof. The synchronization signal block may occupy 4 time domain symbols, and the first time domain symbol may carry the PSS, and the second to fourth time domain symbols may all carry the PBCH. That is, the synchronization signal block includes two signals, namely, the PSS and the PBCH. Figure 9 in (a) and Figure 9 The difference from that shown in (b) thereof is that Figure 9 in the example given in (a), the frequency domain lengths of the PSS and the PBCH may be different. While Figure 9 in the example given in (b), the frequency domain lengths of the PSS and the PBCH may be the same.

[0198] For another example, Figure 10 shows a schematic diagram of the composition of another synchronization signal block provided by an embodiment of the present application. In some other examples, the synchronization signal block may refer to that shown in (a) of Figure 10 or refer to that shown in (b) of Figure 10 The synchronization signal block may occupy 4 time domain symbols, and the third time domain symbol may carry the SSS, and the first, second, and fourth time domain symbols may all carry the PBCH. That is, the synchronization signal block includes two signals, namely, the SSS and the PBCH. Figure 10 in (a) and Figure 10 The difference from that shown in (b) thereof is that Figure 10 in the example given in (a), the frequency domain lengths of the SSS and the PBCH may be different. While Figure 10 in the example given in (b), the frequency domain lengths of the SSS and the PBCH may be the same.

[0199] In the embodiments of the present application, for the synchronization signal blocks shown in the above Figure 8 , Figure 9 , Figure 10 etc., each synchronization signal block may be divided into two categories according to the type or quantity of the first signal. In the first category, all the signals included in the synchronization signal block are the first signals modulated by the single-carrier modulation technology. For each first signal, in the time domain symbol carrying this first signal, each time domain symbol only carries this type of first signal and does not carry other types of signals. In the second category, among the signals included in the synchronization signal block, some signals are the first signals modulated by the single-carrier modulation technology. For each first signal, in the time domain symbol carrying this first signal, each time domain symbol only carries this type of first signal and does not carry other types of signals; the other or remaining signals are the second signals modulated by the multi-carrier modulation technology.

[0200] In other words, in the above-mentioned first type of synchronization signal block, all types of the first signal can be the first signal. In the second type of synchronization signal block, some types of signals are the first signal, such as including at least one first signal, and some other types of signals are the second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0201] Among them, the multi-carrier modulation technique may refer to the OFDM technique. The basic principle of the OFDM technique is to decompose the transmission channel into several orthogonal sub-channels, convert the high-speed data signal to be transmitted into parallel low-speed data streams, and modulate them onto the sub-carriers of each orthogonal channel for transmission. The several orthogonal signals transmitted in a superposition manner are demodulated and separated at the receiving end by a certain method.

[0202] Exemplarily, taking the above Figures 8 to 10 as an example, when Figure 8 the shown synchronization signal block is the first type of synchronization signal block, the three signals such as PSS, SSS, and PBCH are all called the first signal. When Figure 8 the shown synchronization signal block is the second type of synchronization signal block, among the three signals such as PSS, SSS, and PBCH, at least one signal can be used as the first signal, and the remaining signals can be used as the second signal. For example, PBCH is used as the first signal, and PSS and SSS are used as the second signal; or, PBCH and PSS are used as the first signal, and SSS is used as the second signal; or, PBCH and SSS are used as the first signal, and PSS is used as the second signal.

[0203] When Figure 9 the shown synchronization signal block is the first type of synchronization signal block, the two signals such as PSS and PBCH are all called the first signal. When Figure 9 the shown synchronization signal block is the second type of synchronization signal block, among the two signals such as PSS and PBCH, one signal can be used as the first signal, and the remaining signal can be used as the second signal. For example, PBCH is used as the first signal, and PSS is used as the second signal.

[0204] When Figure 10 the shown synchronization signal block is the first type of synchronization signal block, the two signals such as SSS and PBCH are all called the first signal. When Figure 10 the shown synchronization signal block is the second type of synchronization signal block, among the two signals such as SSS and PBCH, one signal can be used as the first signal, and the remaining signal can be used as the second signal. For example, PBCH is used as the first signal, and SSS is used as the second signal.

[0205] Based on the above examples, it can be seen that in the embodiment of the present application, for the first type of synchronization signal block (i.e., a synchronization signal block in which all signals are first signals), the synchronization signal block may include PBCH, and includes PSS and / or SSS. For the second type of synchronization signal block (i.e., a synchronization signal block in which some signals are first signals), the synchronization signal block may be implemented in any of the following ways: 1) the first signal includes PBCH, and the second signal includes PSS and / or SSS; 2) the first signal includes PBCH and PSS, and the second signal includes SSS; 3) the first signal includes PBCH and SSS, and the second signal includes PSS.

[0206] Alternatively, in more examples, the signal in the synchronization signal block may be only the PBCH signal, or only the PSS or SSS, or include the PSS and SSS, etc. For example, in one possible design, the synchronization signal block may occupy 4 time domain symbols, and the first to fourth time domain symbols may all carry the PBCH.

[0207] It should be understood that in addition to the above Figures 8 to 10 In other examples other than those shown, the implementation of the first signal and the second signal is similar to the aforementioned embodiment. For example, when the synchronization signal block includes only one signal, PBCH, PBCH can be modulated by a single carrier modulation technology as the first signal, and each time domain symbol carrying PBCH only carries PBCH and does not carry other types of signals. This type of synchronization signal block can also be defined as the aforementioned first type of synchronization signal block. The implementation of the first signal and the second signal in other examples will not be described in detail in this application.

[0208] It should be noted that the examples given in this article are all illustrated by the synchronization signal block occupying 4 continuous time domain symbols. However, in some examples, the synchronization signal block may also occupy more or less than 4 time domain symbols, and the time domain symbols occupied by the synchronization signal block or the signal in the synchronization signal block may be continuous in the time domain or discontinuous in the time domain, which is not limited here. In addition, for each signal in the synchronization signal block, the signal (such as PBCH, PSS, SSS, etc.) can occupy at least one time domain symbol, and the present application does not limit the number of time domain symbols occupied by each signal.

[0209] Optionally, taking the single-carrier modulation technology as DFT-s-OFDM technology and the multi-carrier modulation technology as OFDM technology as an example, the time domain symbol carrying the first signal modulated by the DFT-s-OFDM technology can be called DFT-s-OFDM symbol or single-carrier symbol, etc., and the time domain symbol carrying the second signal modulated by the OFDM technology can be called OFDM symbol or multi-carrier symbol, etc. The present application does not impose any restrictions on the specific names of the time domain symbols.

[0210] The above describes various implementation manners of the synchronization signal block without considering the DMRS of the PBCH. The following describes the implementation logic of the DMRS of the PBCH in the embodiments of the present application.

[0211] In a possible design, the DMRS of the PBCH can be carried in the same time domain symbol as the PBCH, or rather, the time domain symbol carrying the PBCH can also carry the DMRS of the PBCH. For example, the DMRS of the PBCH can be coset-mapped in the middle of the PBCH. For example, in some examples, among the subcarriers corresponding to the time domain symbol where the PBCH is located, one subcarrier out of every 4 consecutive subcarriers carries the DMRS corresponding to the PBCH, and the remaining subcarriers are the subcarriers occupied by the PBCH. There is no limitation on the mapping manner of the DMRS of the PBCH in the time domain symbol here.

[0212] Optionally, in this design, when the time domain symbol carrying the PBCH also carries the DMRS of the PBCH, the DMRS of the PBCH can be modulated together with the PBCH by the DFT-s-OFDM technology, or the DMRS of the PBCH can also be directly mapped without modulation. It should be understood that when the DMRS of the PBCH is directly mapped without modulation, the DMRS of the PBCH is neither the first signal nor the second signal.

[0213] In this design, the PBCH and the DMRS of the PBCH can be regarded as a whole, and the synchronization signal block can be implemented in the manner described in the foregoing embodiments. The terminal device can perform channel estimation according to the DMRS of the PBCH.

[0214] For example, in the above Figure 6 、 Figure 8 、 Figure 9 、 Figure 10 and other shown synchronization signal blocks, the PBCH includes the DMRS.

[0215] In another possible design, the DMRS of the PBCH can be regarded as an independent type of signal and carried by at least one separate time domain symbol, that is, the time domain symbol can carry only the DMRS of the PBCH.

[0216] For example, Figure 11 shows a schematic diagram of the composition of another synchronization signal block provided by the embodiments of the present application. In some examples, the synchronization signal block can be seen as shown in (a) in Figure 11 or seen in Figure 11As shown in (b) thereof. The synchronization signal block may include four signals: PSS, SSS, PBCH, and the DMRS of PBCH. The synchronization signal block may occupy 5 time-domain symbols. The first time-domain symbol may carry PSS, the second and fourth time-domain symbols may carry PBCH, the third time-domain symbol may carry SSS, and the fifth time-domain symbol may carry the DMRS of PBCH. Figure 11 In (a) and Figure 11 The difference from that shown in (b) thereof is that Figure 11 In the example given in (a), the frequency-domain lengths of PSS and PBCH may be different, the frequency-domain lengths of SSS and PBCH may be different, and the frequency-domain lengths of the DMRS of PBCH and PBCH may be the same (or may also be different). While Figure 11 In the example given in (b), the frequency-domain lengths of PSS, SSS, PBCH, and the DMRS of PBCH may be the same.

[0217] Optionally, in this design, the DMRS of PBCH may be used as a first signal and modulated in the same manner as the other first signals (such as PBCH) described in the foregoing embodiments to implement the synchronization signal block. Alternatively, the DMRS of PBCH may also be directly mapped without modulation. It should be understood that when the DMRS of PBCH is directly mapped without modulation, the DMRS of PBCH is neither a first signal nor a second signal.

[0218] Exemplarily, in one implementation Figure 11 In the synchronization signal block shown (including Figure 11 the synchronization signal blocks shown in (a) and (b) thereof), the four signals of PSS, SSS, PBCH, and the DMRS of PBCH may all be used as first signals. At this time, this synchronization signal block may be the foregoing first type of synchronization signal block.

[0219] In another implementation Figure 11 In the synchronization signal block shown, PSS, SSS, and PBCH may be used as first signals, and the DMRS of PBCH may be directly mapped without modulation.

[0220] In yet another implementation Figure 11 In the synchronization signal block shown, PBCH and the DMRS of PBCH may be used as first signals, and PSS and SSS may be used as second signals; or, PBCH, the DMRS of PBCH, and PSS may be used as first signals, and SSS may be used as second signals; or, PBCH, the DMRS of PBCH, and SSS may be used as first signals, and PSS may be used as second signals. In this implementation, the synchronization signal block may be the foregoing second type of synchronization signal block.

[0221] In yet another implementationFigure 11 In the synchronization signal block shown, the PBCH may be used as the first signal, the PSS and SSS may be used as the second signals, and the DMRS of the PBCH is directly mapped without modulation; or, the PBCH and PSS are used as the first signals, the SSS is used as the second signal, and the DMRS of the PBCH is directly mapped without modulation; or, the PBCH and SSS are used as the first signals, the PSS is used as the second signal, and the DMRS of the PBCH is directly mapped without modulation.

[0222] Similarly, for the case where the synchronization signal block includes the PBCH, the DMRS of the PBCH, and includes one of the PSS and SSS, or includes the PBCH, the DMRS of the PBCH, but does not include the PSS and SSS, all are similar to Figure 11 shown. When the DMRS of the PBCH is modulated by a single-carrier modulation technique as an independent first signal, in the time-domain symbols carrying the DMRS of the PBCH, each time-domain symbol only carries the DMRS of the PBCH and does not carry other signals such as the PBCH, PSS, and SSS. Or, when the DMRS of the PBCH is directly mapped without modulation, in the time-domain symbols carrying the DMRS of the PBCH, each time-domain symbol can also only carry the DMRS of the PBCH and does not carry other signals such as the PBCH, PSS, and SSS.

[0223] In this design, the first signal may include the PBCH, or may further include at least one of the DMRS of the PBCH, PSS, and SSS. When the synchronization signal block includes the DMRS of the PBCH, the DMRS of the PBCH may be modulated by a single-carrier modulation technique as the first signal, or may be directly mapped without modulation, neither as the first signal nor as the second signal.

[0224] In yet another possible design, the synchronization signal block may not carry the DMRS of the PBCH. For example, the synchronization signal block may refer to the above Figure 6 、 Figure 8 、 Figure 9 、 Figure 10 etc., and does not include the DMRS of the PBCH.

[0225] In this design, when the synchronization signal block does not include the DMRS of the PBCH, the terminal device can complete the PBCH channel estimation by means of the PSS and / or SSS, or can use the PSS and / or SSS as the reference signal of the PBCH for channel estimation.

[0226] For example, the method further includes: the terminal device performs channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

[0227] Exemplarily, the terminal device can estimate parameters such as the delay, multipath fading condition, and frequency offset of the channel by detecting information such as the delay, phase, and amplitude of the PSS and SSS signals. This application does not limit the specific manner in which the terminal device performs channel estimation based on the primary synchronization signal and / or the secondary synchronization signal.

[0228] This design can reduce the signaling overhead of the DMRS part of the PBCH and improve the PBCH performance.

[0229] In a possible design, the signals in the synchronization signal block described in the embodiments of this application are constellation modulated by quadrature phase shift keying (QPSK) or pi / 2 binary phase shift keying (BPSK).

[0230] Among them, QPSK is a phase modulation technology that divides the digital data stream into two paths, performs BPSK modulation on each path respectively, and then performs quadrature modulation. Specifically, QPSK divides the input bit stream into a real part and an imaginary part, and each symbol carries two bits of information. The QPSK modulator maps these two bits to four points in the constellation diagram, corresponding to different phases respectively. Therefore, QPSK can carry more information per symbol, thus improving the spectral efficiency.

[0231] Pi / 2 BPSK, also known as π / 2 BPSK, is a special BPSK modulation method that introduces a π / 2 phase shift on the basis of BPSK modulation. In π / 2 BPSK, each symbol only carries one bit of information, but by introducing a π / 2 phase shift, it can achieve performance similar to QPSK while reducing the hardware complexity.

[0232] In this design, when the first signal is constellation modulated by the pi / 2 BPSK method, the peak-to-average ratio can be further reduced and the coverage range of the first signal can be improved.

[0233] Optionally, in the embodiments of this application, M resource blocks (RBs) can be allocated to each time-domain symbol of the synchronization signal block, where M is a positive integer. For example, M can be 22, or 24, or 25, etc. This application does not limit the number of RBs allocated to each time-domain symbol. For example, the number of RBs allocated to each time-domain symbol can also be the same as the number of RBs in the current NR system, which is 20 RBs.

[0234] Among them, RB, also known as physical resource block (PRB), is the basic unit based on frequency resources in a communication system. A resource block generally consists of N resource elements (RE), and a resource element is also called a subcarrier. Generally, N is 12. In the embodiments of the present application, N can be 12 or other values, without limitation. Several resource blocks form a resource block group (RBG), or also known as a physical resource block group. Generally, precoding is performed in units of resource blocks or resource block groups, and the basic unit for precoding transmission is also called a precoding resource block group (PRG). A precoding resource group can be no less than a resource block group.

[0235] Taking the case where the synchronization signal block includes PSS, SSS, and PBCH, and 22 RBs, 24 RBs, and 25 RBs are allocated on each time domain symbol of the synchronization signal block as examples, the resource mapping relationship (or DFT subcarrier mapping relationship) of the synchronization signal block is illustrated.

[0236] Exemplarily, Table 1 gives the resource mapping relationship (PBCH DFT mapping relationship) of PBCH in the synchronization signal block in the three cases of allocating 22 RBs, 24 RBs, and 25 RBs on each time domain symbol, taking one RB including 12 subcarriers as an example. Among them, the Zero mapping carrier represents the subcarrier set to 0 (zero).

[0237] Table 1

[0238]

[0239] Referring to Table 1, when 22 RBs are allocated on each time domain symbol, the subcarriers corresponding to the 22 RBs can be numbered from 0 to 263 in sequence, a total of 264 subcarriers. PBCH can occupy 256 subcarriers or 264 subcarriers. For the way that PBCH occupies 256 subcarriers, PBCH can specifically occupy the subcarriers numbered from 4 to 259, and the subcarriers numbered from 0 to 3 and numbered from 260 to 263 can be set to 0. For the way that PBCH occupies 264 subcarriers, PBCH can specifically occupy the subcarriers numbered from 0 to 263.

[0240] When 24 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered sequentially from 0 to 287, for a total of 288 subcarriers. The PBCH can occupy 256 subcarriers or 288 subcarriers. For the case where the PBCH occupies 256 subcarriers, the PBCH can specifically occupy the subcarriers numbered from 16 to 271, and the subcarriers numbered from 0 to 15 and from 272 to 287 can be set to 0. For the case where the PBCH occupies 288 subcarriers, the PBCH can specifically occupy the subcarriers numbered from 0 to 287.

[0241] When 25 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 25 RBs can be numbered sequentially from 0 to 299, for a total of 300 subcarriers. The PBCH can occupy 256 subcarriers or 300 subcarriers. For the case where the PBCH occupies 256 subcarriers, the PBCH can specifically occupy the subcarriers numbered from 22 to 277, and the subcarriers numbered from 0 to 21 and from 278 to 299 can be set to 0. For the case where the PBCH occupies 300 subcarriers, the PBCH can specifically occupy the subcarriers numbered from 0 to 299.

[0242] Exemplarily, taking one RB to include 12 subcarriers as an example, Table 2 gives the resource mapping relationship (PSS DFT mapping relationship) description of the PSS in the synchronization signal block in three cases of allocating 22 RBs, 24 RBs, and 25 RBs to each time-domain symbol. Among them, the Zero mapping carrier refers to the subcarrier set to 0 (zero).

[0243] Table 2

[0244]

[0245] In Table 2, the M sequence is also called the maximum length sequence. The M sequence and the ZC sequence refer to the sequences used to generate the PSS. The frequency-domain carrier mapping relationship of the PSS is related to the sequence length adopted by the PSS.

[0246] As shown in Table 2, when 22 resource blocks (RBs) are allocated to each time-domain symbol, the subcarriers corresponding to the 22 RBs can be numbered sequentially from 0 to 263, for a total of 264 subcarriers. When the primary synchronization signal (PSS) uses an M-sequence of length 255, it can occupy 255 subcarriers numbered from 4 to 258. When the PSS uses a Zadoff-Chu (ZC) sequence of length 251, it can occupy 251 subcarriers numbered from 6 to 256. When the PSS uses a ZC sequence of length 255, it can occupy 255 subcarriers numbered from 4 to 258. When the PSS uses a ZC sequence of length 257, it can occupy 257 subcarriers numbered from 3 to 259. When the PSS uses a ZC sequence of length 263, it can occupy 263 subcarriers numbered from 0 to 262.

[0247] When 24 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered sequentially from 0 to 287, for a total of 288 subcarriers. When the PSS uses an M-sequence of length 255, it can occupy 255 subcarriers numbered from 16 to 270. When the PSS uses a ZC sequence of length 251, it can occupy 251 subcarriers numbered from 18 to 268. When the PSS uses a ZC sequence of length 255, it can occupy 255 subcarriers numbered from 16 to 270. When the PSS uses a ZC sequence of length 257, it can occupy 257 subcarriers numbered from 15 to 271. When the PSS uses a ZC sequence of length 263, it can occupy 263 subcarriers numbered from 12 to 274. When the PSS uses a ZC sequence of length 269, it can occupy 269 subcarriers numbered from 9 to 277. When the PSS uses a ZC sequence of length 271, it can occupy 271 subcarriers numbered from 8 to 278. When the PSS uses a ZC sequence of length 277, it can occupy 277 subcarriers numbered from 5 to 281. When the PSS uses a ZC sequence of length 281, it can occupy 281 subcarriers numbered from 3 to 283. When the PSS uses a ZC sequence of length 283, it can occupy 283 subcarriers numbered from 2 to 284.

[0248] When 25 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 25 RBs can be numbered from 0 to 299 in sequence, with a total of 300 subcarriers. When the PSS uses an M sequence with a length of 255, it can occupy 255 subcarriers numbered from 22 to 276. When the PSS uses a ZC sequence with a length of 251, it can occupy 251 subcarriers numbered from 24 to 274. When the PSS uses a ZC sequence with a length of 255, it can occupy 255 subcarriers numbered from 22 to 276. When the PSS uses a ZC sequence with a length of 257, it can occupy 257 subcarriers numbered from 21 to 277. When the PSS uses a ZC sequence with a length of 263, it can occupy 263 subcarriers numbered from 18 to 280. When the PSS uses a ZC sequence with a length of 269, it can occupy 269 subcarriers numbered from 15 to 283. When the PSS uses a ZC sequence with a length of 271, it can occupy 271 subcarriers numbered from 14 to 284. When the PSS uses a ZC sequence with a length of 277, it can occupy 277 subcarriers numbered from 11 to 287. When the PSS uses a ZC sequence with a length of 281, it can occupy 281 subcarriers numbered from 9 to 289. When the PSS uses a ZC sequence with a length of 283, it can occupy 283 subcarriers numbered from 8 to 290. When the PSS uses a ZC sequence with a length of 293, it can occupy 293 subcarriers numbered from 3 to 295.

[0249] In Table 2 above, the subcarriers without listed numbers can be set to 0. For example, when 22 RBs are allocated to each time-domain symbol, the PSS uses an M sequence with a length of 255, and occupies 255 subcarriers numbered from 4 to 258, the subcarriers numbered from 0 to 3 and numbered from 259 to 263 can be set to 0.

[0250] Exemplarily, Table 3 takes one RB including 12 subcarriers as an example, and gives the resource mapping relationship (SSS DFT mapping relationship) description of the SSS in the synchronization signal block in three cases of allocating 22 RBs, 24 RBs, and 25 RBs to each time-domain symbol. Among them, the Zero mapping carrier represents the subcarrier set to 0 (zero).

[0251] Table 3

[0252]

[0253] In Table 3, the M sequence and the ZC sequence refer to the sequences used to generate the SSS. The frequency-domain carrier mapping relationship of the SSS is related to the sequence length of the SSS used.

[0254] As shown in Table 3, when 22 resource blocks (RBs) are allocated to each time-domain symbol, the subcarriers corresponding to the 22 RBs can be numbered sequentially from 0 to 263, for a total of 264 subcarriers. When the SSS uses an M-sequence of length 255, it can occupy 255 subcarriers numbered from 5 to 259. When the SSS uses a ZC-sequence of length 251, it can occupy 251 subcarriers numbered from 7 to 257. When the SSS uses a ZC-sequence of length 255, it can occupy 255 subcarriers numbered from 5 to 259. When the SSS uses a ZC-sequence of length 257, it can occupy 257 subcarriers numbered from 4 to 260. When the SSS uses a ZC-sequence of length 263, it can occupy 263 subcarriers numbered from 1 to 263.

[0255] When 24 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered sequentially from 0 to 287, for a total of 288 subcarriers. When the SSS uses an M-sequence of length 255, it can occupy 255 subcarriers numbered from 17 to 271. When the SSS uses a ZC-sequence of length 251, it can occupy 251 subcarriers numbered from 19 to 269. When the SSS uses a ZC-sequence of length 255, it can occupy 255 subcarriers numbered from 17 to 271. When the SSS uses a ZC-sequence of length 257, it can occupy 257 subcarriers numbered from 16 to 272. When the SSS uses a ZC-sequence of length 263, it can occupy 263 subcarriers numbered from 14 to 275. When the SSS uses a ZC-sequence of length 269, it can occupy 269 subcarriers numbered from 10 to 278. When the SSS uses a ZC-sequence of length 271, it can occupy 271 subcarriers numbered from 9 to 279. When the SSS uses a ZC-sequence of length 277, it can occupy 277 subcarriers numbered from 6 to 282. When the SSS uses a ZC-sequence of length 281, it can occupy 281 subcarriers numbered from 4 to 284. When the SSS uses a ZC-sequence of length 283, it can occupy 283 subcarriers numbered from 3 to 285.

[0256] When 25 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 25 RBs can be numbered from 0 to 299 in sequence, with a total of 300 subcarriers. When the SSS uses an M sequence with a length of 255, it can occupy 255 subcarriers numbered from 23 to 277. When the SSS uses a ZC sequence with a length of 251, it can occupy 251 subcarriers numbered from 25 to 275. When the SSS uses a ZC sequence with a length of 255, it can occupy 255 subcarriers numbered from 23 to 277. When the SSS uses a ZC sequence with a length of 257, it can occupy 257 subcarriers numbered from 22 to 278. When the SSS uses a ZC sequence with a length of 263, it can occupy 263 subcarriers numbered from 19 to 281. When the SSS uses a ZC sequence with a length of 269, it can occupy 269 subcarriers numbered from 16 to 284. When the SSS uses a ZC sequence with a length of 271, it can occupy 271 subcarriers numbered from 15 to 285. When the SSS uses a ZC sequence with a length of 277, it can occupy 277 subcarriers numbered from 12 to 288. When the SSS uses a ZC sequence with a length of 281, it can occupy 281 subcarriers numbered from 10 to 290. When the SSS uses a ZC sequence with a length of 283, it can occupy 283 subcarriers numbered from 9 to 291. When the SSS uses a ZC sequence with a length of 293, it can occupy 293 subcarriers numbered from 4 to 296.

[0257] In Table 3 above, the subcarriers without listed numbers can be set to 0. For example, when 22 RBs are allocated to each time-domain symbol and the SSS uses an M sequence with a length of 255, occupying 255 subcarriers numbered from 5 to 259, the subcarriers numbered from 0 to 4 and the subcarriers numbered from 260 to 263 can be set to 0.

[0258] Tables 1 to 3 above successively give examples of the resource mapping relationships of PBCH, PSS, and SSS in the synchronization signal block in three cases where 22 RBs, 24 RBs, and 25 RBs are allocated to each time-domain symbol. It should be understood that the examples shown above are only partial implementation manners of the present application. In some other implementation manners, the number of RBs allocated to each time-domain symbol can be less or more, and the number of subcarriers occupied by PBCH, PSS, and SSS on the time-domain symbol can also be less or more than those in the foregoing examples. Or the number of subcarriers occupied by PBCH, PSS, and SSS respectively can refer to the foregoing examples, but the positions of the subcarriers can be different from those in the foregoing examples. The present application places no restrictions on the number of RBs allocated to each time-domain symbol, and the number and position of subcarriers occupied by each signal in the synchronization signal block on the time-domain symbol, etc.

[0259] For example, in a synchronization signal block, the frequency domain length of the PBCH may be less than or equal to the allocated RB resources. For example, the PBCH may occupy all the RB resources or 256 subcarriers.

[0260] For another example, the frequency domain length of the PSS sequence may be less than or equal to the allocated RB resources. For example, the PSS sequence may be an M sequence of length 255, or a ZC sequence of length .

[0261] Among them, the specific implementation of may be as follows.

[0262]

[0263] For another example, the frequency domain length of the SSS sequence may be less than or equal to the allocated RB resources. For example, the SSS sequence may be an M sequence of length 255, or a ZC sequence of length .

[0264] Among them, the specific implementation of may be as follows.

[0265]

[0266] Optionally, the sequence lengths of the PSS and SSS may be the same or different.

[0267] Optionally, when the frequency domain lengths of the PSS, SSS, and PBCH do not occupy all the allocated RB resources, they may be mapped to any position of the allocated RB resources or to the intermediate subcarriers.

[0268] Exemplarily, in the embodiments of the present application, if the PSS sequence is an M sequence of length 255, it may carry cell ID-related information. For example, ID2 may reuse the existing protocol, such as referring to the following formulas (1) to (3).

[0269] d pss (n) = 1 - 2x(m) Formula (1).

[0270]

[0271] 0 ≤ n < 255 Formula (3).

[0272] Among them, d pss (n) represents the M sequence of the PSS obtained by modulation, n represents the nth data in the sequence; x(m) is the value of the M sequence, which can be 0 or 1; m represents the sequence number; mod255 represents using an M sequence of length 255; represents the identification information of the cell.

[0273] It should be understood that there are multiple possibilities for the tap coefficients generated by the M-sequence of length 255. For example, the tap coefficients generated by the M-sequence can include the following multiple possibilities: '101110001', '110101001', '111110101', '110001101', '101001101', '100101101', '110000111', '111001111', etc. Each possibility of the tap coefficients can be a () mod2 when corresponding to the following formula (4).

[0274] x(i + 8) = (x(i + 6) + x(i + 5) + x(i + 4) + x(i)) mod2 or

[0275] x(i + 8) = (x(i + 7) + x(i + 5) + x(i + 3) + x(i)) mod2 or

[0276] x(i + 8) = (x(i + 7) + x(i + 6) + x(i + 5) + x(i + 4) + x(i + 2) + x(i)) mod2 or

[0277] x(i + 8) = (x(i + 7) + x(i + 3) + x(i + 2) + x(i)) mod2 or

[0278] x(i + 8) = (x(i + 6) + x(i + 3) + x(i + 2) + x(i)) mod2 or

[0279] x(i + 8) = (x(i + 5) + x(i + 3) + x(i + 2) + x(i)) mod2 or

[0280] x(i + 8) = (x(i + 7) + x(i + 2) + x(i + 1) + x(i)) mod2 or

[0281] x(i + 8) = (x(i + 7) + x(i + 6) + x(i + 3) + x(i + 2) + x(i + 1) + x(i)) mod2 Formula (4)

[0282] Exemplarily, the initial value of the M-sequence is any binary combination of length 8.

[0283] For example, the initial value of the M-sequence can be expressed as [x(7)x(6)x(5)x(4)x(3)x(2)x(1)x(0)]. Wherein, the value of x(i) is 0 or 1.

[0284] In a specific example, [x(7)x(6)x(5)x(4)x(3)x(2)x(1)x(0)] = [11110110].

[0285] Exemplarily, in the embodiments of the present application, the PSS sequence may also be a ZC sequence, which may or may not be related to the cell ID. Assuming it is related, the number of IDs that can be carried can be any value. For example, the existing PSS can be reused to carry 3 IDs: Three different ZC sequences are required. Different ZC sequences can be generated by different u-seeds, or can be generated by cyclic shift under the same u-seed. For example, the ZC sequence can refer to the following formulas (5) and (6).

[0286] x u，v (n)=x u ((n + C V ) mod L PSS ) Formula (5).

[0287]

[0288] Wherein, x u represents the expression of the ZC sequence generated under the u-seed, i represents the serial number of the ZC sequence; L PSS represents the length of the ZC sequence; C V represents the cyclic shift parameter, and the value can be 0; x u，v represents the expression of the ZC sequence generated by cyclic shifting the u-seed by C V , and n represents the serial number of the ZC sequence.

[0289] Exemplarily, L PSS (or expressed as ) = 251, 255, 257, 263, 269, 271, 277, 281, 283 or 293. Three representing different cell IDs can be generated by different u-seeds. The u-seed can be any integer combination less than L PSS , for example, u = {2, 56, 138}. Or, it can also be C V = {0, 1, 2}, and the u-seed can be any integer less than L PSS , for example, u = 138.

[0290] The above exemplarily gives the implementation of the M sequence and ZC sequence of the PSS. In the embodiments of the present application, the SSS sequence can reuse the gold sequence in the existing protocol to carry the cell ID, or the SSS sequence can also be generated by an M sequence similar to the PSS signal. Or, the SSS sequence can also be a ZC sequence, which may or may not be related to the cell ID. Assuming it is related, the number of IDs that can be carried can be any value.

[0291] For example, the existing SSS can be reused to carry the ID number, When it is 336, 336 different ZC sequences are required, or a value greater than 330 or other values can also be taken. Different ZC sequences can be generated by different u seeds, or can be generated by cyclic shift under the same u seed. For example, the ZC sequence can refer to the following formulas (7) and (8).

[0292] x u，v (n) = x u ((n + C V ) mod L SSS ) Formula (7).

[0293]

[0294] Among them, x u represents the expression of the ZC sequence generated under the u seed, i represents the serial number of the ZC sequence; L SSS represents the length of the ZC sequence; C V represents the cyclic shift parameter, and the initial value can be 0; x u，v represents the expression of the ZC sequence generated by cyclic shift of the u seed, and n represents the serial number of the ZC sequence.

[0295] Exemplarily, L SSS (or expressed as ) = 251, 255, 257, 263, 269, 271, 277, 281, 283 or 293. Those representing different cell IDs can be generated by different u seeds. The u seed can be any integer combination less than LSSS. For example, u = {2, 5,..., 250}. In this integer combination, the number of elements in the vector of u can equivalently carry cell IDs. The remaining cells are generated by cyclic shift of C V , and the generation method is the same as the cyclic shift method of the ZC sequence in the PSS signal in the above text.

[0296] As described in the foregoing embodiments, in the embodiments of the present application, the synchronization signal block can occupy 4 time domain symbols, or occupy more or fewer time domain symbols than 4, and the time domain symbols occupied by the synchronization signal block or the signals in the synchronization signal block can be time domain continuous or time domain discontinuous. Among them, one signal can occupy at least one time domain symbol.

[0297] Exemplarily, taking the synchronization signal block including PSS, SSS, and PBCH, where PSS and SSS each occupy one time domain symbol and PBCH occupies two time domain symbols as an example, Table 4 gives an example of the time domain symbol / resource mapping relationship of the synchronization signal block.

[0298] Table 4

[0299]

[0300] As shown in Table 4, the channels / signals in the synchronization signal block may include PSS, SSS, and PBCH; in certain cases, there are also subcarriers set to 0, which can be defined or described as "Set to 0". In the example given in Table 4, PSS may occupy the first time-domain symbol numbered 0, SSS may occupy the third time-domain symbol numbered 2, and PBCH may occupy the second time-domain symbol numbered 1 and the fourth time-domain symbol numbered 3. In certain cases, there may be subcarriers set to 0 among the first to fourth time-domain symbols.

[0301] It should be understood that this application does not limit the order or sequence of the time-domain symbols occupied by different signals in the synchronization signal block either.

[0302] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks (RBs) in the frequency domain.

[0303] In this design, among the time-domain symbols carrying the synchronization signal block, for any two different time-domain symbols, these two time-domain symbols may carry the same type of signal, such as both carrying PBCH, or may carry different types of signals, such as one time-domain symbol carrying PSS and the other time-domain symbol carrying SSS. The signals carried on any two different time-domain symbols may occupy the same number of RBs in the frequency domain.

[0304] For example, taking the synchronization signal block including PSS, SSS, and PBCH, which altogether occupy 4 time-domain symbols, where PSS occupies the first time-domain symbol numbered 0, SSS occupies the third time-domain symbol numbered 2, PBCH occupies the second time-domain symbol numbered 1 and the fourth time-domain symbol numbered 3 as an example, PSS may occupy 22 RBs in the frequency domain on the first time-domain symbol, SSS may occupy 22 RBs in the frequency domain on the third time-domain symbol, PBCH may occupy 22 RBs in the frequency domain on the second time-domain symbol, and PBCH may occupy 22 RBs in the frequency domain on the fourth time-domain symbol.

[0305] In one example, 22 resource blocks (RBs) are allocated to each time-domain symbol, and one RB includes 12 subcarriers. The Primary Synchronization Signal (PSS) can occupy 22 RBs with RB numbers 0 - 21 on the first time-domain symbol. Specifically, it can occupy subcarriers numbered 4 to 258. The Secondary Synchronization Signal (SSS) can also occupy 22 RBs with RB numbers 0 - 21 on the third time-domain symbol. Specifically, it can occupy subcarriers numbered 5 to 259. The Physical Broadcast Channel (PBCH) can also occupy 22 RBs with RB numbers 0 - 21 on the second time-domain symbol. Specifically, it can occupy subcarriers numbered 4 to 259. The PBCH can also occupy 22 RBs with RB numbers 0 - 21 on the fourth time-domain symbol. Specifically, it can occupy subcarriers numbered 4 to 259.

[0306] In this design, when signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain, for any two different signals, the RBs occupied by these two signals on one time-domain symbol are the same. For example, the RBs occupied by the PSS, SSS, and PBCH on one time-domain symbol are the same. This design method can make the result of channel estimation of the PBCH based on the PSS and / or SSS more accurate.

[0307] In a possible design, among the time-domain symbols carrying the Synchronization Signal Block (SSB), the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and their sequence numbers (or called numbers) are the same.

[0308] Similar to the foregoing embodiments, in this design, among the time-domain symbols carrying the SSB, for any two different time-domain symbols, these two time-domain symbols may carry the same type of signal, such as both carrying the PBCH, or may carry different types of signals, such as one time-domain symbol carrying the PSS and the other time-domain symbol carrying the SSS. The signals carried on any two different time-domain symbols can occupy the same number of subcarriers in the frequency domain, and the numbers (positions) of the occupied subcarriers are the same.

[0309] For example, taking the case where 22 RBs are allocated to each time-domain symbol, one RB includes 12 subcarriers, the SSB includes the PSS, SSS, and PBCH, and a total of 4 time-domain symbols are occupied. The PSS occupies the first time-domain symbol numbered 0, the SSS occupies the third time-domain symbol numbered 2, and the PBCH occupies the second time-domain symbol numbered 1 and the fourth time-domain symbol numbered 3 as an example, Figure 12 shows a schematic diagram of the subcarrier mapping relationship of an SSB provided by an embodiment of the present application. As Figure 12As shown, PSS can occupy 255 subcarriers numbered from 4 to 258 on the first time-domain symbol. SSS can also occupy 255 subcarriers numbered from 4 to 258 on the third time-domain symbol. PBCH can occupy 255 subcarriers numbered from 4 to 258 on the second time-domain symbol and 255 subcarriers numbered from 4 to 258 on the fourth time-domain symbol. PSS, SSS, and PBCH each occupy the same number of subcarriers on one time-domain symbol, and the subcarriers they occupy have the same numbers.

[0310] It can be understood that when the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same sequence numbers (or called numbers), the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain. On the basis that the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain, further having the same number of subcarriers and the same numbers of the occupied subcarriers can further improve the channel estimation performance of PBCH.

[0311] In another possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different sequence numbers is close (greater than 0), such as the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0312] Exemplarily, subcarriers with different sequence numbers refer to subcarriers with misaligned sequence numbers. For example, if a signal carried by one time-domain symbol occupies 255 subcarriers numbered from 4 to 258 in the frequency domain, and a signal carried by another time-domain symbol occupies 255 subcarriers numbered from 3 to 257 in the frequency domain, then the subcarriers with different sequence numbers in the first time-domain symbol refer to the subcarrier numbered 258, and the subcarriers with different sequence numbers in the second time-domain symbol refer to the subcarrier numbered 3. The resource blocks corresponding to subcarriers with different sequence numbers can be the RB numbered 0 and the RB numbered 21.

[0313] Optionally, the first threshold can be values such as 2, 3, etc., and the present application does not limit the magnitude of the first threshold.

[0314] It can be understood that when the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold, the signals carried by different time-domain symbols may occupy the same number of RBs in the frequency domain or may occupy different numbers of RBs in the frequency domain. The number of resource blocks corresponding to subcarriers with different sequence numbers being less than the first threshold can also control the number of misaligned RBs within a range less than the first threshold.

[0315] In this design, signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than a first threshold, which can also further improve the channel estimation performance of PBCH.

[0316] In another possible design, among the time-domain symbols carrying the synchronization signal block, signals carried by different time-domain symbols occupy approximately the same number of subcarriers in the frequency domain. For example, the difference in the number of subcarriers occupied by signals carried by different time-domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is approximately the same (greater than 0). For example, the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold.

[0317] Among them, the definitions or meanings of subcarriers with different serial numbers, resource blocks corresponding to subcarriers with different serial numbers, and the first threshold can be referred to those described in the foregoing embodiments and will not be elaborated here. The second threshold can be values such as 2, 3, 4, 5, etc., and the present application does not limit the magnitude of the second threshold.

[0318] In this design, the difference in the number of subcarriers occupied by signals carried by different time-domain symbols in the frequency domain is less than the second threshold, and the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold, which can also further improve the channel estimation performance of PBCH.

[0319] Optionally, in some other designs, the above-mentioned "the number of resource blocks corresponding to subcarriers with different serial numbers is approximately the same" can also be defined as "the number of resource blocks corresponding to subcarriers with different serial numbers is less than or equal to the first threshold", or defined as "among the resource blocks occupied by signals carried by different time-domain symbols in the frequency domain, the resource blocks with misaligned numbers are less than or equal to the first threshold", or defined as "the numbers of resource blocks occupied by signals carried by different time-domain symbols in the frequency domain are approximately the same". The present application does not limit the specific implementation of "the number of resource blocks corresponding to subcarriers with different serial numbers is approximately the same".

[0320] Similarly, the above-mentioned "signals carried by different time-domain symbols occupy approximately the same number of subcarriers in the frequency domain" can also be defined as "the difference in the number of subcarriers occupied by signals carried by different time-domain symbols in the frequency domain is less than or equal to the second threshold", which is not limited here either.

[0321] Optionally, in the embodiments of the present application, the single-carrier modulation technology may also be other technologies similar to the DFT-s-OFDM technology. For example, the single-carrier modulation technology may further include technologies such as single-carrier quadrature amplitude modulation (SC-QAM), single-carrier frequency domain equalization (SC-FDE), and direct sequence spread spectrum (DSSS). Similarly, the multi-carrier modulation technology may also be other technologies similar to the OFDM technology. The present application does not limit the specific implementations of the single-carrier modulation technology and the multi-carrier modulation technology.

[0322] In the embodiments of the present application, in the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal. From the perspective of the RB resource mapping shape, this mapping method of the first signal can also be referred to as block mapping.

[0323] Optionally, the SSB in the current NR system can be defined as NR SSB. The synchronization signal block proposed in the embodiments of the present application is different from the NR SSB, and it can be referred to as the first SSB, or block SSB, or other names, which is not limited herein.

[0324] Based on the above embodiments, the embodiments of the present application actually provide methods that can be applied to network devices and terminal devices respectively. Among them, the method applied to the network device can refer to the steps executed by the network device in the foregoing embodiments. The method applied to the terminal device can refer to the steps executed by the terminal device in the foregoing embodiments.

[0325] Optionally, the embodiments of the present application further provide a synchronization signal block, which includes at least one type of the first signal. The first signal is modulated by the single-carrier modulation technology. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal.

[0326] The specific implementation and the beneficial effects of this synchronization signal block can be referred to in the foregoing embodiments and will not be elaborated herein.

[0327] The above mainly introduces the solutions provided by the embodiments of the present application from the perspective of the interaction between each network element. It can be understood that each network element, such as a network device, a terminal device, etc., includes corresponding hardware structures and / or software modules for executing each function in order to implement the above functions.

[0328] For example, an embodiment of the present application may provide a communication device for implementing the functions of the above network device. The communication device may be a network device or a device (e.g., a chip) built into the network device. Figure 13 shows a schematic structural diagram of the communication device provided by an embodiment of the present application. As Figure 13 shown, the communication device may include: an acquisition unit 1301 and a transmission unit 1302.

[0329] Among them, the acquisition unit 1301 is used to acquire a synchronization signal block.

[0330] The transmission unit 1302 is used to transmit the synchronization signal block.

[0331] The synchronization signal block includes at least one first signal. The first signal is modulated by a single-carrier modulation technique. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal.

[0332] In a possible design, the first signal includes a physical broadcast channel.

[0333] Alternatively, in another possible design, the first signal includes a physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

[0334] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0335] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0336] Or, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0337] Or, in yet another possible design of this implementation, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0338] In a possible design, the first signal described in any of the above designs further includes a demodulation reference signal of the physical broadcast channel.

[0339] In a possible design, the signals in the synchronization signal block are constellation-modulated by an orthogonal phase shift keying method or a pi / 2 binary phase shift keying method.

[0340] In a possible design, among the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

[0341] In a possible design, in the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same sequence number.

[0342] Alternatively, in another possible design, in the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0343] Or, in still another possible design, in the time-domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0344] For another example, an embodiment of the present application further provides a communication device for implementing the functions of the above terminal device. This communication device can be a terminal device or a device (such as a chip) built into the terminal device. Figure 14 Fig. shows another schematic structural diagram of the communication device provided by the embodiment of the present application. As Figure 14 shown, the communication device may include: a receiving unit 1401 and a processing unit 1402.

[0345] Among them, the receiving unit 1401 is used to receive a synchronization signal block. The synchronization signal block includes at least one first signal, and the first signal is modulated by a single-carrier modulation technique. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of first signal.

[0346] The processing unit 1402 is used to perform synchronization according to the synchronization signal block.

[0347] In a possible design, the first signal includes a physical broadcast channel.

[0348] Alternatively, in another possible design, the first signal includes a physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

[0349] Optionally, in some implementations, the synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

[0350] In a possible design of this implementation, the first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal.

[0351] Alternatively, in another possible design of this implementation, the first signal includes a physical broadcast channel and a primary synchronization signal, and the second signal includes a secondary synchronization signal.

[0352] Alternatively, in another possible design of this implementation manner, the first signal includes a physical broadcast channel and a secondary synchronization signal, and the second signal includes a primary synchronization signal.

[0353] In a possible design, the first signal in any of the above designs further includes a demodulation reference signal of the physical broadcast channel.

[0354] In a possible design, the processing unit 1402 is further configured to perform channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

[0355] In a possible design, the signals in the synchronization signal block are constellation modulated by quadrature phase shift keying or pi / 2 binary phase shift keying.

[0356] In a possible design, in the time domain symbols carrying the synchronization signal block, the signals carried by different time domain symbols occupy the same number of resource blocks in the frequency domain.

[0357] In a possible design, in the time domain symbols carrying the synchronization signal block, the signals carried by different time domain symbols occupy the same number of subcarriers in the frequency domain and have the same sequence number.

[0358] Alternatively, in another possible design, in the time domain symbols carrying the synchronization signal block, the signals carried by different time domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0359] Or, in yet another possible design, in the time domain symbols carrying the synchronization signal block, the difference in the number of subcarriers occupied by the signals carried by different time domain symbols is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than a first threshold.

[0360] It should be understood that the division of units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into a physical entity, or physically separated. And the units in the device can all be implemented in the form of software called by processing elements; they can also all be implemented in the form of hardware; or some units can be implemented in the form of software called by processing elements, and some units can be implemented in the form of hardware.

[0361] For example, each unit can be a separately established processing element, or can be integrated and implemented in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program and called and executed by a certain processing element of the device. In addition, all or part of these units can be integrated together or can be independently implemented. The processing element described here can also be called a processor and can be an integrated circuit with the ability to process signals. In the implementation process, each step of the above method or each of the above units can be implemented through the integrated logic circuit of the hardware in the processor element or in the form of software called by the processing element.

[0362] In one example, the units in any of the above devices can be one or more integrated circuits configured to implement the above method. For example: one or more application specific integrated circuits (ASICs), or one or more digital signal processing (DSP) circuits, or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0363] For another example, when the units in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a CPU or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0364] The above unit for receiving is an interface circuit or an input circuit of the device and is used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the receiving unit is an interface circuit or an input circuit of the chip for receiving signals from other chips or devices. When the communication device includes a unit for sending, the unit for sending is an interface circuit or an output circuit of the device and is used to send signals to other devices. For example, when the device is implemented in the form of a chip, the sending unit is an interface circuit or an output circuit of the chip for sending signals to other chips or devices.

[0365] For example, the embodiments of the present application can also provide a communication device, which can include: a processor and an interface circuit. The processor can include one or more.

[0366] When the communication device is applied to a network device, the processor is used to communicate with other devices through the interface circuit and execute each step performed by the network device in the above method.

[0367] When the communication device is applied to a terminal device, the processor is used to communicate with other devices through the interface circuit and execute each step performed by the terminal device in the above method.

[0368] In one implementation, the units that implement the respective corresponding steps in the above method for the network device or the terminal device can be implemented in the form of a processing element scheduler. For example, the device for the network device or the terminal device can include a processing element and a storage element. The processing element calls the program stored in the storage element to execute the method performed by the corresponding network device or terminal device in the above method embodiments. The storage element can be a storage element on the same chip as the processing element, that is, an on-chip storage element.

[0369] In another implementation, the program for executing the method performed by the network device or the terminal device in the above method can be in a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element calls or loads the program from the off-chip storage element onto the on-chip storage element to call and execute the method performed by the corresponding network device or terminal device in the above method embodiments.

[0370] For example, an embodiment of the present application can further provide a communication device. The communication device can include a processor for executing computer instructions stored in a memory. When the computer instructions are executed, the device executes the method performed by the above network device or terminal device. The memory can be located inside the communication device or outside the communication device. And the processor includes one or more.

[0371] In yet another implementation, the units that implement the respective steps in the above method for the network device or the terminal device can be configured as one or more processing elements. These processing elements can be correspondingly arranged on the network device or the terminal device. Here, the processing element can be an integrated circuit, such as: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

[0372] The units that implement the respective steps in the above method for the network device or the terminal device can be integrated together and implemented in the form of an SOC. The SOC chip is used to implement the corresponding method. At least one processing element and a storage element can be integrated in the chip, and the corresponding method is implemented in the form of the processing element calling the program stored in the storage element; or, at least one integrated circuit can be integrated in the chip to implement the corresponding method; or, the above implementation methods can be combined, and the functions of some units are implemented in the form of the processing element calling the program, and the functions of some units are implemented in the form of an integrated circuit.

[0373] The processing element here is the same as described above and can be a general-purpose processor, such as a CPU, or can also be one or more integrated circuits configured to implement the above methods. For example: one or more ASICs, or one or more microprocessors DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.

[0374] The storage element can be a memory or a collective term for multiple storage elements.

[0375] For example, the embodiments of the present application also provide a chip system, which can be applied to the above-mentioned network device or terminal device. The chip system includes one or more interface circuits and one or more processors; the interface circuits and the processors are interconnected by lines; the processors receive and execute computer instructions from the memory of the electronic device through the interface circuits to implement the methods executed by the corresponding network device or terminal device in the above method embodiments. Among them, the electronic device can be a network device or a terminal device, or a device in the network device or terminal device, or can also be other devices communicating with the network device or terminal device.

[0376] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used for example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0377] In several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the module or unit is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0378] The unit described as a separate component may or may not be physically separated. The component displayed as a unit can be a physical unit or multiple physical units, that is, it can be located in one place or can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0379] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0380] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product, such as: a program. This software product is stored in a program product, such as a computer-readable storage medium, and includes several instructions to enable a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs, etc., all kinds of media that can store program codes.

[0381] For example, the embodiments of the present application can also provide a computer-readable storage medium, including: computer software instructions; when the computer software instructions are run, the steps executed by the network device or the terminal device in the methods described in the foregoing embodiments are realized.

[0382] Exemplarily, when the computer software instructions run in a network device or a device (such as a chip) built into the network device, the network device is enabled to implement the steps executed by the network device in the foregoing embodiments.

[0383] Or, when the computer software instructions run in a terminal device or a device (such as a chip) built into the terminal device, the terminal device is enabled to implement the steps executed by the terminal device in the foregoing embodiments.

[0384] Optionally, the embodiments of the present application also provide a communication device. The communication device can include: a transceiver unit and a processing unit. The transceiver unit can be used to send and receive information, or to communicate with other network elements. The processing unit can be used to process data. For example: This device can implement the methods executed by the above-mentioned network device or terminal device through the transceiver unit and the processing unit.

[0385] Optionally, the embodiments of the present application also provide a computer program product, which can implement the methods executed by the above-mentioned network device or terminal device when executed.

[0386] Based on the above embodiments, the embodiments of the present application further provide a communication system, including: a network device and a terminal device. The network device performs the steps executed by the network device in the method described in the foregoing embodiments. The terminal device performs the steps corresponding to and interacting with the network device in the method described in the foregoing embodiments.

[0387] Exemplarily, the embodiments of the present application further provide a network device, which can be used to implement the method executed by the network device in the foregoing embodiments.

[0388] Exemplarily, the embodiments of the present application further provide a terminal device, which can be used to implement the method executed by the terminal device in the foregoing embodiments.

[0389] It should be understood that the description of technical features, technical solutions, beneficial effects or similar languages in the present application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that at least one embodiment includes specific technical features, technical solutions or beneficial effects. Therefore, the descriptions of technical features, technical solutions or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments.

[0390] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, The method includes: Obtaining a synchronization signal block; Transmitting the synchronization signal block; The synchronization signal block includes at least one first signal, which is modulated by single-carrier modulation technology. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal.

2. The method according to claim 1, wherein The first signal includes a physical broadcast channel; Alternatively, the first signal includes the physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

3. The method according to claim 1, characterized in that, The synchronization signal block further includes at least one second signal, which is modulated by multi-carrier modulation technology.

4. The method according to claim 3, characterized in that, The first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal; Alternatively, the first signal includes the physical broadcast channel and the primary synchronization signal, and the second signal includes the secondary synchronization signal; Or, the first signal includes the physical broadcast channel and the secondary synchronization signal, and the second signal includes the primary synchronization signal.

5. The method according to claim 2 or 4, characterized in that, The first signal further includes a demodulation reference signal of the physical broadcast channel.

6. The method according to any one of claims 1-5, characterized in that, The signals in the synchronization signal block are constellation-modulated by quadrature phase shift keying or pi / 2 binary phase shift keying.

7. The method according to any one of claims 1-6, characterized in that, In the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of resource blocks in the frequency domain.

8. The method according to any one of claims 1-7, characterized in that, In the time-domain symbols carrying the synchronization signal block, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the serial numbers are the same; Alternatively, the signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to the subcarriers with different serial numbers is less than a first threshold; Or, the difference in the number of subcarriers occupied by the signals carried by different time-domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to the subcarriers with different serial numbers is less than the first threshold.

9. A communication method, characterized in that, The method includes: Receiving a synchronization signal block, the synchronization signal block includes at least one first signal, which is modulated by single-carrier modulation technology. In the time-domain symbols carrying the first signal, each time-domain symbol carries one type of the first signal; Performing synchronization according to the synchronization signal block.

10. The method according to claim 9, characterized in that, The first signal includes a physical broadcast channel; Alternatively, the first signal includes the physical broadcast channel, and includes a primary synchronization signal and / or a secondary synchronization signal.

11. The method according to claim 9, wherein The synchronization signal block further includes at least one second signal, which is modulated by multi-carrier modulation technology.

12. The method according to claim 11, wherein The first signal includes a physical broadcast channel, and the second signal includes a primary synchronization signal and / or a secondary synchronization signal; Alternatively, the first signal includes the physical broadcast channel and the primary synchronization signal, and the second signal includes the secondary synchronization signal; Or, the first signal includes the physical broadcast channel and the secondary synchronization signal, and the second signal includes the primary synchronization signal.

13. The method according to claim 10 or 12, characterized in that, The first signal further includes a demodulation reference signal of the physical broadcast channel.

14. The method according to claim 10 or 12, characterized in that, The method further includes: Performing channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

15. The method according to any one of claims 9 - 14, characterized in that The signals in the synchronization signal block are constellation - modulated by Quadrature Phase Shift Keying (QPSK) or Pi / 2 - Binary Phase Shift Keying (π / 2 - BPSK).

16. The method according to any one of claims 9-15, characterized in that, In the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of resource blocks in the frequency domain.

17. The method according to any one of claims 9-16, characterized in that In the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain and have the same sequence number; Or, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than a first threshold; Or, the difference in the number of sub - carriers occupied by the signals carried by different time - domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than the first threshold.

18. A communication device, characterized in that, The device includes: An acquisition unit, configured to acquire a synchronization signal block; A transmission unit, configured to transmit the synchronization signal block; The synchronization signal block includes at least one first signal, and the first signal is modulated by a single - carrier modulation technique. In the time - domain symbols carrying the first signal, each time - domain symbol carries one type of the first signal.

19. The device according to claim 18, wherein, The first signal includes a Physical Broadcast Channel (PBCH); Or, the first signal includes the Physical Broadcast Channel, and includes a Primary Synchronization Signal (PSS) and / or a Secondary Synchronization Signal (SSS).

20. The device according to claim 18, characterized in that, The synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi - carrier modulation technique.

21. The device according to claim 20, characterized in that, The first signal includes a Physical Broadcast Channel, and the second signal includes a Primary Synchronization Signal and / or a Secondary Synchronization Signal; Or, the first signal includes the Physical Broadcast Channel and the Primary Synchronization Signal, and the second signal includes the Secondary Synchronization Signal; Or, the first signal includes the Physical Broadcast Channel and the Secondary Synchronization Signal, and the second signal includes the Primary Synchronization Signal.

22. The device according to claim 19 or 21, characterized in that, The first signal further includes a Demodulation Reference Signal (DM - RS) of the Physical Broadcast Channel.

23. The device according to any one of claims 18-22, characterized in that, The signals in the synchronization signal block are constellation - modulated by Quadrature Phase Shift Keying (QPSK) or Pi / 2 - Binary Phase Shift Keying (π / 2 - BPSK).

24. The device according to any one of claims 18-23, characterized in that, In the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of resource blocks in the frequency domain.

25. The device according to any one of claims 18-24, characterized in that, In the time - domain symbols carrying the synchronization signal block, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain and have the same sequence number; Or, the signals carried by different time - domain symbols occupy the same number of sub - carriers in the frequency domain, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than a first threshold; Or, the difference in the number of sub - carriers occupied by the signals carried by different time - domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to sub - carriers with different sequence numbers is less than the first threshold.

26. A communication device, characterized in that, The device includes: A receiving unit, configured to receive a synchronization signal block. The synchronization signal block includes at least one first signal, and the first signal is modulated by a single - carrier modulation technique. In the time - domain symbols carrying the first signal, each time - domain symbol carries one type of the first signal; A processing unit, configured to perform synchronization according to the synchronization signal block.

27. The device according to claim 26, wherein, The first signal includes a Physical Broadcast Channel; Alternatively, the first signal includes the physical broadcast channel, and includes the primary synchronization signal and / or the secondary synchronization signal.

28. The device according to claim 26, characterized in that, The synchronization signal block further includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technique.

29. The device according to claim 28, characterized in that, The first signal includes the physical broadcast channel, and the second signal includes the primary synchronization signal and / or the secondary synchronization signal; Alternatively, the first signal includes the physical broadcast channel and the primary synchronization signal, and the second signal includes the secondary synchronization signal; Or alternatively, the first signal includes the physical broadcast channel and the secondary synchronization signal, and the second signal includes the primary synchronization signal.

30. The device according to claim 27 or 29, characterized in that, The first signal further includes the demodulation reference signal of the physical broadcast channel.

31. The device according to claim 27 or 29, characterized in that, The processing unit is further configured to perform channel estimation according to the primary synchronization signal and / or the secondary synchronization signal.

32. The device according to any one of claims 26 - 31, characterized in that, The signals in the synchronization signal block are constellation-modulated by quadrature phase shift keying or pi / 2 binary phase shift keying.

33. The device according to any one of claims 26-32, characterized in that, Among the time domain symbols carrying the synchronization signal block, the signals carried by different time domain symbols occupy the same number of resource blocks in the frequency domain.

34. The device according to any one of claims 26 - 33, characterized in that, Among the time domain symbols carrying the synchronization signal block, the signals carried by different time domain symbols occupy the same number of subcarriers in the frequency domain, and the subcarrier numbers are the same; Alternatively, the signals carried by different time domain symbols occupy the same number of subcarriers in the frequency domain, and the number of resource blocks corresponding to subcarriers with different numbers is less than a first threshold; Or alternatively, the difference in the number of subcarriers occupied by the signals carried by different time domain symbols in the frequency domain is less than a second threshold, and the number of resource blocks corresponding to subcarriers with different numbers is less than the first threshold.

35. A communication device, characterized in that, The device includes: a processor, configured to execute computer instructions stored in a memory, and when the computer instructions are executed, cause the device to execute the method according to any one of claims 1-8, or execute the method according to any one of claims 9-17.

36. A communication device, characterized in that, The device includes: a processor and an interface circuit, the processor is configured to communicate with other devices through the interface circuit, and execute the method according to any one of claims 1-8, or execute the method according to any one of claims 9-17.

37. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes instructions, and when the instructions are run, cause the method according to any one of claims 1-8 to be implemented, or cause the method according to any one of claims 9-17 to be implemented.

38. A computer program product, characterized in that, When the computer program product is executed, it causes the method according to any one of claims 1-8 to be implemented, or causes the method according to any one of claims 9-17 to be implemented.

39. A chip system, characterized in that, The chip system includes one or more interface circuits and one or more processors; The interface circuit and the processor are interconnected by a line; The processor receives and executes computer instructions from the memory of the electronic device through the interface circuit to implement the method according to any one of claims 1-8, or implement the method according to any one of claims 9-17.

40. A communication system, characterized in that, Including: A network device and a terminal device; The network device executes the method according to any one of claims 1-8; The terminal device executes the method according to any one of claims 9-17.

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