Communication method and apparatus

Abstract

The present application relates to the field of communications, and discloses a communication method and apparatus. The method comprises: acquiring a synchronization signal block; sending the synchronization signal block, the synchronization signal block comprising at least one type of first signal, the first signal being modulated by means of a single-carrier modulation technique, and each time domain symbol among time domain symbols that carry the first signal carrying a first signal of one type. The present application can increase or enhance the coverage range of a synchronization signal block, and reduce the difference between the coverage ranges of the synchronization signal block and a data signal.

Description

Communication method and device

[0001] This application claims priority to Chinese patent application number 202311824524.8, filed on December 26, 2023, with invention name “Communication Method and Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and device. Background Art

[0003] In the fifth generation (5G) new radio (NR) technology, downlink signals can be transmitted using beams. The signal that provides downlink synchronization using beams is called a synchronization signal. For example, the synchronization signal sent by a base station can be a synchronization signal block (SSB), which can also be called a synchronization signal / physical broadcast channel block (SS / PBCH block).

[0004] Currently, as cellular communications evolve toward high frequencies, the gap between the coverage of the physical downlink shared channel (PDSCH) and the SSB is gradually widening. Summary of the Invention

[0005] The present application provides a communication method and device that can improve or enhance the coverage of synchronization signal blocks, thereby reducing the gap between the coverage of synchronization signal blocks and data signals.

[0006] In the first aspect, the present application provides a communication method, which includes: obtaining a synchronization signal block; sending a synchronization signal block; the synchronization signal block includes at least one first signal, the first signal is modulated by a single carrier modulation technology, and in the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0007] 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 into the network device.

[0008] In this communication method, the first signal in the synchronization signal block is modulated by a single-carrier modulation technology. 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). This can reduce or eliminate the frequency domain intersection between the first signal and other signals, making the first signal suitable for modulation by a single-carrier modulation technology. The modulation of the first signal by a 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 thereby improve or enhance the coverage of the first signal. By improving or enhancing the coverage of the first signal (i.e., improving the coverage of the synchronization signal block), the gap between the coverage of the synchronization signal block and the data signal (such as PDSCH) can be reduced.

[0009] In one possible design, the first signal includes a physical broadcast channel.

[0010] For example, all synchronization signal blocks may be physical broadcast channels. The physical broadcast channel is the first signal.

[0011] 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.

[0012] For example, the synchronization signal block may include a physical broadcast channel, a primary synchronization signal, and a secondary synchronization signal, and all three signals are first signals. Alternatively, the synchronization signal block may include a physical broadcast channel and a primary synchronization signal, and both signals are first signals. Alternatively, the synchronization signal block may include a physical broadcast channel and primary and secondary synchronization signals, and both signals are first signals.

[0013] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0014] In one 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.

[0015] 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.

[0016] Alternatively, in 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.

[0017] This application does not limit the signal type of the synchronization signal block.

[0018] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0019] For example, the demodulation reference signal (DMRS) of the physical broadcast channel (PBCH) can be considered as an independent signal. Exemplarily, the DMRS of the PBCH can be used as a first signal and modulated in the same manner as other first signals (such as the PBCH) to implement the synchronization signal block.

[0020] Alternatively, in some other possible designs, the PBCH DMRS can be used as an independent signal and carried by at least one independent time domain symbol. The PBCH DMRS can be directly mapped without modulation. It should be understood that when the PBCH DMRS is directly mapped without modulation, the PBCH DMRS is neither the first signal nor the second signal.

[0021] In another possible design, the DMRS for the PBCH can be carried in the same time-domain symbols as the PBCH, or in other words, the time-domain symbols carrying the PBCH can also carry the DMRS for the PBCH. For example, the DMRS for the PBCH can be mapped to the PBCH quality check. For example, in some examples, among the subcarriers corresponding to the time-domain symbols where the PBCH is located, one subcarrier out of every four consecutive subcarriers carries the DMRS corresponding to the PBCH, and the remaining subcarriers are subcarriers occupied by the PBCH.

[0022] Optionally, in this design, when the time-domain symbols carrying the PBCH also carry the PBCH DMRS, the PBCH DMRS can be modulated together with the PBCH using the DFT-s-OFDM technique, or the PBCH DMRS can be directly mapped without modulation. It should be understood that when the PBCH DMRS is directly mapped without modulation, the PBCH DMRS is neither the first signal nor the second signal.

[0023] In this design, the PBCH and its DMRS can be considered as a whole, and the synchronization signal block can be implemented in the manner described in the above embodiment. The terminal device can perform channel estimation based on the DMRS of the PBCH.

[0024] In another possible design, the synchronization signal block may not carry the DMRS of the PBCH.

[0025] In this design, the synchronization signal block does not include the DMRS of the PBCH. The terminal device can use the PSS and / or SSS to complete the PBCH channel estimation, or use the PSS and / or SSS as the reference signal of the PBCH for channel estimation.

[0026] This design can reduce the signaling overhead of the DMRS part of the PBCH and improve the PBCH performance.

[0027] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0028] In this design, when the first signal is constellation modulated using the pi / 2BPSK method, the peak-to-average ratio can be further reduced and the coverage range of the first signal can be improved.

[0029] In one 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.

[0030] 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 the two signals in one time domain symbol are the same, which can make the channel estimation result of PBCH based on PSS and / or SSS more accurate.

[0031] In one 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.

[0032] When signals carried by different time-domain symbols occupy the same number of subcarriers in the frequency domain and have the same sequence number (or number), the signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain. If signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain and further have the same number of subcarriers and the same number of occupied subcarriers, the channel estimation performance of the PBCH can be further improved.

[0033] 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 the first threshold.

[0034] When 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, the signals carried by different time domain symbols may occupy the same number of RBs or different numbers of RBs in the frequency domain. If the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold, the number of RBs with misaligned sequence numbers can also be controlled to be within a range less than the first threshold.

[0035] 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 sequence numbers is less than the first threshold, which can further improve the channel estimation performance of PBCH.

[0036] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0037] 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 sequence numbers is less than the first threshold, which can also further improve the channel estimation performance of PBCH.

[0038] In a second aspect, the present application provides a communication device having the functionality to implement the method described in the first aspect. The functionality can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functionality of the method described in the first aspect, such as an acquisition unit, a sending unit, and the like.

[0039] Among them, the acquisition unit is used to obtain the synchronization signal block.

[0040] A sending unit is used to send a synchronization signal block.

[0041] The synchronization signal block includes at least one first signal, which is modulated by a single-carrier modulation technology. In the time domain symbols carrying the first signal, each time domain symbol carries one type of first signal.

[0042] In one possible design, the first signal includes a physical broadcast channel.

[0043] 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.

[0044] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0045] In one 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.

[0046] 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.

[0047] Alternatively, in 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.

[0048] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0049] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0050] In one 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.

[0051] In one 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.

[0052] 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 the first threshold.

[0053] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0054] In a third aspect, the present application also provides a communication device, comprising: a processor for executing computer instructions stored in a memory, so that when the computer instructions are executed, the device executes the method described in the first aspect or any possible design of the first aspect.

[0055] In a fourth aspect, the present application also provides a communication device, comprising: a processor and an interface circuit, the processor being used to communicate with other devices through the interface circuit and execute the method described in the first aspect or any possible design of the first aspect.

[0056] Illustratively, in the third aspect and the fourth aspect, the processor is configured to execute the method described in the first aspect or any possible design of the first aspect.

[0057] 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.

[0058] In a fifth aspect, the present application further provides a computer-readable storage medium comprising: computer software instructions, or instructions; when the computer software instructions are executed, 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 executed in a network device or a device (e.g., 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.

[0059] It can be understood that the beneficial effects that can be achieved by the second to fifth aspects provided above can refer to the beneficial effects in the first aspect and any possible design thereof, and will not be repeated here.

[0060] In a sixth aspect, the present application provides a communication method, which includes: 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 technology, and in the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal; and performing synchronization according to the synchronization signal block.

[0061] Exemplarily, the method described in the sixth aspect can be applied to a terminal device, such as: the method is executed by the terminal device, or by a device (e.g., a chip) built into the terminal device.

[0062] In this communication method, the first signal in the synchronization signal block is modulated by a single-carrier modulation technology. 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). This can reduce or eliminate the frequency domain intersection between the first signal and other signals, making the first signal suitable for modulation by a single-carrier modulation technology. The modulation of the first signal by a 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 thereby improve or enhance the coverage of the first signal. By improving or enhancing the coverage of the first signal (i.e., improving the coverage of the synchronization signal block), the gap between the coverage of the synchronization signal block and the data signal (such as PDSCH) can be reduced.

[0063] In one possible design, the first signal includes a physical broadcast channel.

[0064] 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.

[0065] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0066] In one 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.

[0067] 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.

[0068] Alternatively, in 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.

[0069] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0070] In one possible design, the method further includes: performing channel estimation based on the primary synchronization signal and / or the secondary synchronization signal.

[0071] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0072] In one 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.

[0073] In one 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.

[0074] 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 the first threshold.

[0075] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0076] The beneficial effects of the sixth aspect mentioned above can refer to the beneficial effects of the first aspect and will not be repeated here.

[0077] In a seventh aspect, the present application provides a communication device having the functionality to implement the method described in the sixth aspect. The functionality can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the functionality of the method described in the sixth aspect, such as a receiving unit, a processing unit, and the like.

[0078] Among them, the receiving unit is used to receive a synchronization signal block, which includes at least one first signal. The first signal is modulated by a single carrier modulation technology. In the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0079] A processing unit is used for synchronizing according to the synchronization signal block.

[0080] In one possible design, the first signal includes a physical broadcast channel.

[0081] 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.

[0082] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0083] In one 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.

[0084] 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.

[0085] Alternatively, in 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.

[0086] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0087] In one possible design, the processing unit is further configured to perform channel estimation based on the primary synchronization signal and / or the secondary synchronization signal.

[0088] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0089] In one 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.

[0090] In one 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.

[0091] 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 the first threshold.

[0092] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0093] In an eighth aspect, the present application also provides a communication device, comprising: a processor for executing computer instructions stored in a memory, so that when the computer instructions are executed, the device executes the method described in the sixth aspect or any possible design of the sixth aspect.

[0094] In the ninth aspect, the present application also provides a communication device, comprising: a processor and an interface circuit, the processor being used to communicate with other devices through the interface circuit and execute the method described in the sixth aspect or any possible design of the sixth aspect.

[0095] Illustratively, in the eighth and ninth aspects, the processor is configured to execute the method described in the sixth aspect or any possible design of the sixth aspect.

[0096] The communication device described in the seventh to ninth aspects above may be a terminal device or a device built into the terminal device (eg, a chip).

[0097] In a tenth aspect, the present application further provides a computer-readable storage medium comprising: computer software instructions, or instructions; when the computer software instructions are executed, the method described in the sixth aspect or any possible design of the sixth aspect is implemented. For example, when the computer software instructions are executed in a terminal device or a device (e.g., a chip) built into the terminal device, the terminal device implements the method described in the sixth aspect or any possible design of the sixth aspect.

[0098] It can be understood that the beneficial effects that can be achieved in the seventh to tenth aspects provided above can be referred to the beneficial effects in the sixth aspect and any possible design thereof, and will not be repeated here.

[0099] On the eleventh aspect, the present application provides a synchronization signal block, which includes at least one first signal, the first signal is modulated by a single carrier modulation technology, and in the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0100] In one possible design, the first signal includes a physical broadcast channel.

[0101] 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.

[0102] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0103] In one 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.

[0104] 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.

[0105] Alternatively, in 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.

[0106] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0107] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0108] In one 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.

[0109] In one 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.

[0110] 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 the first threshold.

[0111] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0112] The beneficial effects of the eleventh aspect mentioned above can refer to the beneficial effects of the first aspect and will not be repeated here.

[0113] In a twelfth aspect, the present application further provides a communications device comprising: 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. The device can implement the method described in the first aspect and any possible design thereof, or the method described in the sixth aspect and any possible design thereof, through the transceiver unit and the processing unit.

[0114] In the thirteenth aspect, the present application also provides a computer program product, which, when executed, can implement the method described in the first aspect and any possible design thereof, or the method described in the sixth aspect and any possible design thereof.

[0115] In the fourteenth aspect, the present application also provides a chip system, which includes one or more interface circuits and one or more processors; the interface circuits and the processors are interconnected through lines; the processor receives and executes computer instructions from the memory of the electronic device through the interface circuit to implement the method described in the first aspect and any possible design thereof, or the method described in the sixth aspect and any possible design thereof.

[0116] In the fifteenth aspect, the present application also provides a communication system, including: a network device and a terminal device; the network device executes the method described in the first aspect and any possible design thereof; the terminal device executes the method described in the sixth aspect and any possible design thereof.

[0117] In the sixteenth aspect, the present application also provides a network device that can be used to implement the method described in the first aspect and any possible design thereof.

[0118] In the seventeenth aspect, the present application also provides a terminal device that can be used to implement the method described in the sixth aspect and any possible design thereof.

[0119] It can be understood that the beneficial effects that can be achieved in the above-mentioned aspects 12 to 17 can refer to the beneficial effects described in the first aspect, the sixth aspect, the eleventh aspect, etc., and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0120] FIG1 is a schematic diagram of SSB in an NR communication system;

[0121] Figure 2 is a schematic diagram showing the differences in coverage between SSB and PDSCH in different frequency bands;

[0122] FIG3 shows a schematic diagram of the composition of a communication system provided in an embodiment of the present application;

[0123] FIG4 shows a schematic diagram of the composition of a network device provided in an embodiment of the present application;

[0124] FIG5 is a schematic diagram showing a flow chart of a communication method provided in an embodiment of the present application;

[0125] FIG6 shows a schematic diagram of the composition of a synchronization signal block provided in an embodiment of the present application;

[0126] FIG7 shows a schematic diagram of the process of DFT-s-OFDM modulation provided in an embodiment of the present application;

[0127] FIG8 shows a schematic diagram of the composition of another synchronization signal block provided in an embodiment of the present application;

[0128] FIG9 shows a schematic diagram of the composition of another synchronization signal block provided in an embodiment of the present application;

[0129] FIG10 shows a schematic diagram of the composition of another synchronization signal block provided in an embodiment of the present application;

[0130] FIG11 shows a schematic diagram of the composition of another synchronization signal block provided in an embodiment of the present application;

[0131] FIG12 shows a schematic diagram of a subcarrier mapping relationship of a synchronization signal block provided in an embodiment of the present application;

[0132] FIG13 shows a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0133] FIG14 shows another schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0134] In the fifth generation (5G) new radio (NR) technology, downlink signals of the communication system can be sent in beam form. The signal that provides downlink synchronization in beam form can be called a synchronization signal. For example, the synchronization signal sent by the base station can be a synchronization signal block (SSB), which can also be called a synchronization signal / physical broadcast channel block (SS / PBCH block). In the following description, both are referred to as synchronization signal blocks.

[0135] For example, Figure 1 is a schematic diagram of SSB in the NR communication system. As shown in Figure 1, in the time domain (referred to as the time domain), one SSB can occupy four consecutive orthogonal frequency division multiplexing (OFDM) symbols. In the frequency domain (referred to as the frequency domain), one SSB can occupy 240 consecutive subcarriers, and these 240 subcarriers are numbered from 0 to 239. The OFDM symbol numbers (symbol numbers) corresponding to the four OFDM symbols occupied by one SSB can be 0, 1, 2, and 3, respectively.

[0136] The first OFDM symbol (i.e., OFDM symbol numbered 0) can carry the primary synchronization signal (PSS). Subcarriers numbered 0 to 55 and 183 to 239 are set to 0; subcarriers numbered 56 to 182 are subcarriers occupied by the PSS.

[0137] The second and fourth OFDM symbols (i.e., OFDM symbols numbered 1 and 3) can carry the physical broadcast channel (PBCH). Among them, among the subcarriers numbered 0 to 239, one subcarrier in every four consecutive subcarriers is the demodulation reference signal (DMRS) corresponding to the PBCH, and the remaining subcarriers are subcarriers occupied by the PBCH.

[0138] The third OFDM symbol (i.e., OFDM symbol numbered 2) can carry the secondary synchronization signal (SSS) and PBCH. Subcarriers numbered 56 to 182 are occupied by the SSS; subcarriers numbered 48 to 55 and 183 to 191 are set to 0; and among subcarriers numbered 0 to 47 and 192 to 239, one of every four consecutive subcarriers is the DMRS corresponding to the PBCH, and the remaining subcarriers are occupied by the PBCH.

[0139] In other words, in the current SSB structure, the SSB occupies four consecutive OFDM symbols in the time domain and 20 resource blocks (RBs) or 240 subcarriers in the frequency domain. The PSS occupies 127 subcarriers or resource elements in the first OFDM symbol of the SSB; the SSS occupies 127 subcarriers in the third OFDM symbol of the SSB; and the PBCH and its DMRS occupy 576 subcarriers in the second, third, and fourth OFDM symbols.

[0140] Currently, cellular communications are gradually evolving toward higher frequencies, using more frequency bands to access more abundant wireless spectrum resources, faster signal transmission speeds, or lower latency. However, as cellular communications evolve toward higher frequencies, the gap between the coverage of broadcast signals (such as SSB) and data signals (such as the physical downlink shared channel (PDSCH)) is widening, impacting the performance of communication systems.

[0141] For example, Figure 2 shows the difference in coverage between SSB and PDSCH in different frequency bands. As shown in Figure 2, taking frequency band F1 as an example, where the frequency is lower than frequency band F2, the number of antennas in array 1 used in a communication system using frequency band F1 is lower than the number of antennas in array 2 used in a communication system using frequency band F2. The gap (GAP) between the coverage of an SSB beam (SSB coverage for short) and the coverage of a PDSCH beam (PDSCH coverage for short) can be defined as the area covered by PDSCH but not by SSB. In Figure 2, the GAP between the SSB coverage and the PDSCH coverage in a communication system using frequency band F2 is greater than the GAP between the SSB coverage and the PDSCH coverage in a communication system using frequency band F1.

[0142] Against this background, the present application provides a communication method in which a network device can obtain and send a synchronization signal block, and a terminal device can receive the synchronization signal block and synchronize based on the received synchronization signal block. The synchronization signal block includes at least one first signal, which is modulated using a single-carrier modulation technique, and each time-domain symbol carrying the first signal carries a type of first signal.

[0143] This method can utilize single-carrier modulation technology 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 thereby reduce the gap between the coverage range of the synchronization signal block and the PDSCH.

[0144] For example, FIG3 shows a schematic diagram of the composition of a communication system provided in an embodiment of the present application. The communication method provided in an embodiment of the present application can be applied to the communication system shown in FIG3. As shown in FIG3, the communication system can include: a network device 310 and a terminal device 320.

[0145] The network device 310 may be referred to as an access network device, a radio access network (RAN) device, or a next-generation radio access network device. For example, the network device 310 may be a base station, an access point, or a device in an access network that communicates with wireless terminals over the air interface through one or more sectors. Different access network devices may communicate with each other via an Xn interface.

[0146] Optionally, in an embodiment of the present application, the network device 310 may include various forms of macro base stations, micro base stations (also called small stations), etc. For example, the network device 310 may include: a base station in wideband code division multiple access (WCDMA) or LTE, a next generation nodeB (gNB), a next generation evolved nodeB (Ng-eNB), a transmission reception point (TRP), an evolved NodeB (eNB), a radio network controller (RNC), a NodeB (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB, or home NodeB, 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.

[0147] In some deployments, a 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 some gNB functions, while the DU implements some gNB functions. For example, the CU is responsible for processing non-real-time protocols and services, and implements 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 implements the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. The AAU implements some physical layer processing functions, RF processing, and active antenna-related functions.

[0148] Terminal device 320 may also be referred to as user equipment. In some examples, terminal device 320 may be an access terminal, a subscriber unit, a subscriber 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., without limitation.

[0149] In the embodiment of the present application, the terminal device 320 can be a wireless terminal or a wired terminal. A wireless terminal can be a device that provides voice and / or other service data connectivity to a user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. For example, the terminal device 320 can be a mobile phone, a tablet computer, a computer with wireless transceiver function, 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 a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a 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 function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G mobile communication system or a terminal in a future evolution network, etc. This application does not limit the specific product form of the terminal device 320.

[0150] Optionally, the communication system shown in Figure 3 can 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 that use OFDM technology, etc., or it can also be the future sixth generation mobile information technology (the 6th generation mobile communication technology, 6G) network communication system, or other future communication systems. This application does not limit the specific type of the communication system.

[0151] In addition, the aforementioned communication system is merely intended to more clearly illustrate the technical solutions of the embodiments of the present application and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. For example, the communication system may also include other devices, such as core network devices and network control devices. The network control device may be an operation administration and maintenance (OAM) system, also known as a network management system.

[0152] For example, FIG4 illustrates a schematic diagram of the composition of a network device provided in an embodiment of the present application. The network device may be network device 310 in the aforementioned communication system, such as a base station. As shown in FIG4 , the network device may include at least one processor 41, a memory 42, a communication interface 43, and a bus 44.

[0153] Processor 41 is the control center of the network device and can be a single processor or a collective term for multiple processing elements. For example, processor 41 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more microprocessors (digital signal processors, DSPs) or one or more field programmable gate arrays (FPGAs).

[0154] The processor 41 can execute various functions of the network device by running or executing software programs stored in the memory 42 and calling data stored in the memory 42. For example, the processor 41 can execute the steps performed by the network device (such as a base station) in the communication method provided in the embodiment of the present application.

[0155] In a specific implementation, as an embodiment, the processor 41 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 4 .

[0156] In a specific implementation, as an embodiment, the network device may include multiple processors, such as processor 41 and processor 45 shown in Figure 4. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here can refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

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

[0158] The memory 42 may exist independently and be connected to the processor 41 via the bus 44. Alternatively, the memory 42 may be integrated with the processor 41, which is not limited here.

[0159] Communication interface 43 , using any transceiver or other device, is used to communicate with other devices or communication networks. Communication interface 43 may be an Ethernet interface, a radio access network (RAN) interface, a wireless local area network (WLAN) interface, or the like. Communication interface 43 may include a receiving unit for receiving functions and a transmitting unit for transmitting functions.

[0160] Bus 44 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. This bus can be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, FIG4 shows only one thick line, but this does not imply that there is only one bus or only one type of bus.

[0161] Although a bus 44 is used in FIG. 4 , it is understandable that the bus can be replaced by other forms of connection relationships and is not limited to the bus itself.

[0162] Optionally, in an embodiment of the present application, the composition of the above-mentioned terminal device may also refer to that shown in FIG4 , or the terminal device may also include more or fewer components than those shown in FIG4 , which is not limited here.

[0163] The following is an exemplary description of the communication method provided in the embodiments of the present application. The processing described below as being performed by a single execution subject can also be divided into multiple execution subjects, which can 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.

[0164] It should be noted that in the description of the embodiments of the present application, the words "first" and "second" are merely for distinguishing descriptions and are not used to specifically limit a particular feature. That is, the first or second can include more content, rather than being limited to a specific concept. "And / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. At least one refers to one or more; multiple refers to two or more. The embodiments of the present application may only perform fewer steps than all the steps, or perform more steps, without limitation. "At least one of the following" or similar expressions is used to indicate any combination of the listed items; for example, at least one of A, B, and / or C can mean the following: A exists alone, B exists alone, C exists alone, A and B exist at the same time, B and C exist at the same time, A and C exist at the same time, and A, B, and C exist at the same time, where A, B, and C can be single or multiple.

[0165] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of this application. 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.

[0166] Figure 5 shows a flow chart of a communication method provided by an embodiment of the present application. As shown in Figure 5, the communication method may include S501-S502.

[0167] For example, in the process shown in FIG5 , the steps performed by the network device may be performed by the network device or a device (e.g., a chip) built into the network device. The steps performed by the terminal device may be performed by the terminal device or a device (e.g., a chip) built into the terminal device.

[0168] S501. The network device obtains a synchronization signal block.

[0169] Exemplarily, the network device may be a base station, and the synchronization signal block may refer to a synchronization signal that the base station needs to send, such as an SSB.

[0170] In an embodiment of the present application, the synchronization signal block includes at least one first signal, which is modulated by a single-carrier modulation technology. In the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0171] Single-carrier modulation technology can refer to discrete Fourier transform spreading OFDM (DFT-s-OFDM) technology. DFT-s-OFDM technology is a derivative of OFDM technology. It can perform DFT processing on the subcarriers used by the user, converting them from the time domain to the frequency domain. The user's frequency domain signal is then modulated by OFDM. In this way, the signals of each user are converted to the time domain for transmission.

[0172] For example, Figure 6 shows a schematic diagram of the composition of a synchronization signal block provided in an embodiment of the present application. As shown in Figure 6, in a possible design, the synchronization signal block may include PSS, SSS and PBCH. The PSS may carry a cell identifier, such as a physical cell ID (PCI) at the physical layer. The SSS may carry part of the system frame number (SFN) information. The PBCH may carry main information block (MIB) information, which carries the parameter set used for 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, which contains cell-specific parameter information, such as cell ID, cell configuration, etc. The PSS, SSS and PBCH may all be used as first signals modulated by a single-carrier modulation technique. For each first signal, in the time domain symbols carrying the 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 carries only the PBCH, and does not carry the PSS and SSS.

[0173] In this design, the synchronization signal block can be obtained by the network equipment by modulating the information that needs to be carried by PSS, SSS and PBCH based on DFT-s-OFDM technology.

[0174] For example, Figure 7 shows a schematic diagram of the DFT-s-OFDM modulation process provided by an embodiment of the present application. As shown in Figure 7, the DFT-s-OFDM modulation process may include modulation, discrete Fourier transform (DFT), subcarrier (SC) mapping, inverse fast Fourier transform (IFFT) & + CP. "&" represents sum, and "+ CP" represents the addition of a cyclic prefix.

[0175] The modulation part / step / module encodes, scrambles, and constellation-modulates data (e.g., the information carried by the first signal) to produce a number of complex symbols. Channel coding increases redundancy and improves channel fault tolerance. Scrambling increases signal randomness, reduces signal correlation, and lowers the peak-to-average ratio, making the signal easier to transmit.

[0176] The DFT part refers to performing DFT processing on the complex symbols obtained from the modulation part.

[0177] The SC mapping part refers to subcarrier mapping of complex symbols after DFT processing.

[0178] The IFFT&+CP part refers to performing IFFT processing on the symbols after SC mapping, converting the frequency domain signal into a time domain signal, and adding a cyclic prefix (CP) in front of the time domain signal to increase the system's resistance to multipath interference.

[0179] Taking PBCH carrying MIB information as an example, the network device can modulate the MIB information based on the DFT-s-OFDM technology according to the process shown in Figure 7 to obtain PBCH. For example, in the modulation part shown in Figure 7, the network device can encode, scramble and constellation modulate the MIB information to obtain a number of complex symbols. In the DFT part shown in Figure 7, the network device can perform DFT processing on the aforementioned complex symbols. In the SC mapping part shown in Figure 7, the network device can perform subcarrier mapping on the complex symbols after DFT processing and map them to the frequency domain. In the IFFT&+CP part shown in Figure 7, the network device can perform IFFT processing and +CP processing on the symbols after SC mapping to obtain PBCH.

[0180] Similarly, the network device can obtain PSS and SSS respectively according to the process shown in Figure 7, and then obtain the synchronization signal block.

[0181] Optionally, after executing the DFT-s-OFDM modulation process described in FIG7 to obtain the synchronization signal block, the network device may further filter the synchronization signal block, for example, by using an SSB filter to convert the synchronization signal block into a single sideband signal.

[0182] The above-mentioned DFT-s-OFDM modulation process can also be found in the third generation partnership project (3GPP) technical specification (TS) 38.211.6.3.1.4, which is not repeated here.

[0183] S502. The network device sends a synchronization signal block.

[0184] Accordingly, the terminal device receives the synchronization signal block.

[0185] Exemplarily, after the network device obtains the synchronization signal block through modulation, it can map the synchronization signal block to the antenna port and send it through the antenna.

[0186] It should be understood that the network device may send the synchronization signal block in a broadcast format, and the synchronization signal block may be broadcast at the physical layer. For example, the base station may send the synchronization signal block in at least one beam direction and complete the transmission of the synchronization signal block in all beam directions within a certain time (e.g., 5 milliseconds (ms)).

[0187] For example, the base station may send a set of synchronization signal blocks including multiple beam directions every 20 ms (for example only, other values ​​may also be used). The synchronization signal blocks sent in multiple beam directions may cover the coverage range of the base station. For example, if the base station covers a circular area, the base station may send a synchronization signal block every 20 ms to scan a 360-degree range. For example, the base station may send 8 synchronization signal blocks within 5 ms, and send them to different beam directions.

[0188] After powering on or reconnecting to the network, terminal devices can scan or detect synchronization signal blocks sent by network devices to synchronize downlink time and frequency. This process is also called cell search. Terminal devices located in different cells or at different locations within a cell may detect one or more synchronization signal blocks.

[0189] S503. The terminal device is synchronized according to the synchronization signal block.

[0190] Exemplarily, after receiving a synchronization signal block, the terminal device can perform physical layer synchronization by receiving the synchronization signal block 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 is not further described here, nor is it limited.

[0191] 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 MIB information. When the terminal device does not scan and receive the synchronization signal block, the above S503 may not exist.

[0192] In the communication method provided in the embodiment of the present application, the first signal in the synchronization signal block is modulated by a single-carrier modulation technology. 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). This can reduce or eliminate the frequency domain intersection between the first signal and other signals, making the first signal suitable for modulation by a single-carrier modulation technology. The modulation of the first signal by a 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 thereby improve or enhance the coverage of the first signal. By improving or enhancing the coverage of the first signal, the gap between the coverage of the synchronization signal block and the data signal (such as PDSCH) can be reduced.

[0193] PAPR is the ratio of a signal's peak power to its average power. Generally speaking, a lower PAPR means a smaller difference between the signal's peak power and average power, and the signal is closer to the average power. This reduces the output power fluctuation range of the power amplifier, lowering the signal's peak power and, consequently, the power requirements of the power amplifier.

[0194] Taking the first signal including PBCH and the single-carrier modulation technology as DFT-s-OFDM technology as an example, in the current NR system, the SSS and PBCH in SSB (or NR SSB) have overlapping parts in the frequency domain, which means that the frequency domain single-carrier characteristics of DFT-s-OFDM are destroyed, which will affect the PAPR of the time domain signal, thereby affecting the output power and efficiency of the PA, and affecting the coverage range. For example, since SSS and PBCH have overlapping parts in the frequency domain, the signal PAPR may be increased, affecting the coverage range. The embodiment of the present application can reduce or eliminate the frequency domain intersection of SSS and PBCH, and use DFT-s-OFDM technology for modulation to improve the coverage range of the PBCH signal.

[0195] It should be noted that in the above embodiment, only the design in which the synchronization signal block includes PSS, SSS, and PBCH, and the PSS, SSS, and PBCH are all used as the first signal is described as an example. However, in more embodiments of the present application, the synchronization signal block can have more implementation methods, which are exemplified below.

[0196] Exemplarily, in an embodiment of the present application, the synchronization signal block may include at least one of PSS, SSS and PBCH.

[0197] For example, Figure 8 shows a schematic diagram of the composition of another synchronization signal block provided in an embodiment of the present application. In some examples, the synchronization signal block can be shown in Figure 8, or in Figure 6 in the aforementioned embodiment. The synchronization signal block can occupy 4 time domain symbols, and the first time domain symbol can carry PSS, the third time domain symbol can carry SSS, and the second time domain symbol and the fourth time domain symbol can both carry PBCH. That is, there are three types of signals in the synchronization signal block, namely PSS, SSS and PBCH. The difference shown in Figure 6 and Figure 8 is that in the example given in Figure 6, the frequency domain lengths of PSS and PBCH can be different, and the frequency domain lengths of SSS and PBCH can be different. In the example given in Figure 8, the frequency domain lengths of PSS, SSS and PBCH can be the same.

[0198] For another example, Figure 9 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 can be shown in (a) of Figure 9, or in (b) of Figure 9. The synchronization signal block can occupy 4 time domain symbols, and the first time domain symbol can carry PSS, and the second to fourth time domain symbols can all carry PBCH. That is, the synchronization signal block includes two signals, PSS and PBCH. The difference shown in (a) of Figure 9 and (b) of Figure 9 is that in the example given in (a) of Figure 9, the frequency domain lengths of PSS and PBCH may be different. In the example given in (b) of Figure 9, the frequency domain lengths of PSS and PBCH may be the same.

[0199] 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 can be shown in (a) of Figure 10, or in (b) of Figure 10. The synchronization signal block can occupy 4 time domain symbols, and the 3rd time domain symbol can carry SSS, and the 1st time domain symbol, the 2nd time domain symbol and the 4th time domain symbol can all carry PBCH. That is, the synchronization signal block includes two signals, SSS and PBCH. The difference between (a) in Figure 10 and (b) in Figure 10 is that in the example given in (a) of Figure 10, the frequency domain lengths of SSS and PBCH can be different. In the example given in (b) of Figure 10, the frequency domain lengths of SSS and PBCH can be the same.

[0200] In an embodiment of the present application, for the synchronization signal blocks shown in Figures 8, 9, 10, etc., each synchronization signal block can be divided into two categories according to the type or quantity of the first signal. In the first category, all signals included in the synchronization signal block are first signals modulated by a single-carrier modulation technology. For each first signal, in the time domain symbols carrying the 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 first signals modulated by a single-carrier modulation technology. For each first signal, in the time domain symbols carrying the 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 second signals modulated by a multi-carrier modulation technology.

[0201] In other words, in the first type of synchronization signal block, all types of first signals can be first signals. In the second type of synchronization signal block, some types of signals are first signals, such as including at least one first signal, and some other types of signals are second signals, where the second signals are modulated using a multi-carrier modulation technique.

[0202] Multi-carrier modulation technology can refer to OFDM technology. The basic principle of OFDM technology 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 superimposed and transmitted orthogonal signals are demodulated and separated in a certain manner at the receiving end.

[0203] For example, taking Figures 8 to 10 above as an example, when the synchronization signal block shown in Figure 8 is a first-type synchronization signal block, the three signals, namely, PSS, SSS, and PBCH, are all referred to as first signals. When the synchronization signal block shown in Figure 8 is a second-type synchronization signal block, at least one of the three signals, namely, PSS, SSS, and PBCH, can be used as the first signal, and the remaining signals can be used as second signals. For example, PBCH can be used as the first signal, and PSS and SSS can be used as the second signal; alternatively, PBCH and PSS can be used as the first signal, and SSS can be used as the second signal; or alternatively, PBCH and SSS can be used as the first signal, and PSS can be used as the second signal.

[0204] When the synchronization signal block shown in Figure 9 is a first-type synchronization signal block, both the PSS and PBCH signals are referred to as first signals. When the synchronization signal block shown in Figure 9 is a second-type synchronization signal block, one of the PSS and PBCH signals can be used as the first signal, and the other can be used as the second signal. For example, the PBCH can be used as the first signal, and the PSS can be used as the second signal.

[0205] When the synchronization signal block shown in Figure 10 is a first-type synchronization signal block, both the SSS and PBCH signals are referred to as first signals. When the synchronization signal block shown in Figure 10 is a second-type synchronization signal block, one of the SSS and PBCH signals can be used as the first signal, and the other can be used as the second signal. For example, the PBCH can be used as the first signal, and the SSS can be used as the second signal.

[0206] Based on the above examples, it can be seen that in the embodiments 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 include 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.

[0207] 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 both the PSS and SSS, etc. For example, in one possible design, the synchronization signal block may occupy four time domain symbols, and the first to fourth time domain symbols may all carry the PBCH.

[0208] It should be understood that in other examples other than those shown in Figures 8 to 10 above, the implementation of the first signal and the second signal is similar to that of the aforementioned embodiment. For example, when the synchronization signal block includes only one signal, PBCH, the PBCH can be modulated as the first signal by a single-carrier modulation technology. In the time domain symbols carrying the PBCH, each time domain symbol only carries the 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. This application does not elaborate on the implementation of the first signal and the second signal in other examples.

[0209] It should be noted that the examples given in this article are all illustrated by assuming that the synchronization signal block occupies 4 continuous time domain symbols. However, in some examples, the synchronization signal block may also occupy more or fewer time domain symbols than 4, 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, and this is not limited here. In addition, for each signal in the synchronization signal block, such signal (such as PBCH, PSS, SSS, etc.) may occupy at least one time domain symbol, and this application does not limit the number of time domain symbols occupied by each signal.

[0210] 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 a DFT-s-OFDM symbol or a single-carrier symbol, etc., and the time domain symbol carrying the second signal modulated by the OFDM technology can be called an OFDM symbol or a multi-carrier symbol, etc. This application does not limit the specific name of the time domain symbol.

[0211] The above describes various implementations 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 embodiment of the present application.

[0212] In one possible design, the DMRS for the PBCH can be carried in the same time-domain symbol as the PBCH, or in other words, the DMRS for the PBCH can also be carried in the time-domain symbol that carries the PBCH. For example, the DMRS for the PBCH can be mapped in a combo to the PBCH QS. For example, in some examples, among the subcarriers corresponding to the time-domain symbol where the PBCH is located, one subcarrier out of every four consecutive subcarriers carries the DMRS corresponding to the PBCH, and the remaining subcarriers are subcarriers occupied by the PBCH. There is no restriction on the mapping method of the DMRS for the PBCH in the time-domain symbol.

[0213] Optionally, in this design, when the time-domain symbols carrying the PBCH also carry the PBCH DMRS, the PBCH DMRS can be modulated together with the PBCH using the DFT-s-OFDM technique, or the PBCH DMRS can be directly mapped without modulation. It should be understood that when the PBCH DMRS is directly mapped without modulation, the PBCH DMRS is neither the first signal nor the second signal.

[0214] In this design, the PBCH and its DMRS can be considered as a whole, and the synchronization signal block can be implemented in the manner described in the above embodiment. The terminal device can perform channel estimation based on the DMRS of the PBCH.

[0215] For example, in the synchronization signal blocks shown in Figures 6, 8, 9, 10, etc., the PBCH includes DMRS.

[0216] In another possible design, the DMRS of the PBCH may be considered as an independent signal and carried by at least one separate time domain symbol, that is, the time domain symbol may only carry the DMRS of the PBCH.

[0217] For example, Figure 11 shows a schematic diagram of the composition of another synchronization signal block provided by an embodiment of the present application. In some examples, the synchronization signal block can be shown in (a) of Figure 11, or in (b) of Figure 11. The synchronization signal block may include four signals, namely, PSS, SSS, PBCH, and DMRS of PBCH. The synchronization signal block may occupy 5 time domain symbols, and the first time domain symbol may carry PSS, the second time domain symbol and the fourth time domain symbol may carry PBCH, the third time domain symbol may carry SSS, and the fifth time domain symbol may carry DMRS of PBCH. The difference between (a) of Figure 11 and (b) of Figure 11 is that in the example given in (a) of Figure 11, 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 PBCH DMRS and PBCH may be the same (or may be different). In the example given in (b) of Figure 11, the frequency domain lengths of PSS, SSS, PBCH, and DMRS of PBCH may be the same.

[0218] Optionally, in this design, the PBCH DMRS can be used as a first signal and modulated in the same manner as other first signals (such as PBCH) described in the previous embodiments to implement a synchronization signal block. Alternatively, the PBCH DMRS can be directly mapped without modulation. It should be understood that when the PBCH DMRS is directly mapped without modulation, the PBCH DMRS is neither a first signal nor a second signal.

[0219] Exemplarily, in one implementation, in the synchronization signal block shown in Figure 11 (including the synchronization signal blocks shown in (a) and (b) in Figure 11), four signals such as PSS, SSS, PBCH and DMRS of PBCH can all be used as first signals. At this time, the synchronization signal block can be the aforementioned first type of synchronization signal block.

[0220] In another implementation, in the synchronization signal block shown in FIG11 , PSS, SSS and PBCH may be used as the first signal, and the DMRS of the PBCH may be directly mapped without modulation.

[0221] In another implementation, in the synchronization signal block shown in FIG11 , the PBCH and its DMRS may serve as the first signal, and the PSS and SSS may serve as the second signal; alternatively, the PBCH, its DMRS, and PSS may serve as the first signal, and the SSS may serve as the second signal; alternatively, the PBCH, its DMRS, and SSS may serve as the first signal, and the PSS may serve as the second signal. In this implementation, the synchronization signal block may be the aforementioned second type of synchronization signal block.

[0222] In another implementation, in the synchronization signal block shown in Figure 11, PBCH can be used as the first signal, PSS and SSS can be used as the second signal, and the DMRS of PBCH is directly mapped without modulation; or, PBCH and PSS are used as the first signal, SSS is used as the second signal, and the DMRS of PBCH is directly mapped without modulation; or, PBCH and SSS are used as the first signal, PSS is used as the second signal, and the DMRS of PBCH is directly mapped without modulation.

[0223] Similarly, for the case where the synchronization signal block includes the PBCH, the PBCH's DMRS, and one of the PSS and SSS, or the case where the synchronization signal block includes the PBCH, the PBCH's DMRS, but does not include the PSS and SSS, similar to that shown in FIG11, if the PBCH's DMRS is modulated as an independent first signal using a single-carrier modulation technique, then in the time-domain symbols carrying the PBCH's DMRS, each time-domain symbol only carries the PBCH's DMRS and does not carry other signals such as the PBCH, PSS, and SSS. Alternatively, if the PBCH's DMRS is directly mapped without modulation, in the time-domain symbols carrying the PBCH's DMRS, each time-domain symbol may also only carry the PBCH's DMRS and does not carry other signals such as the PBCH, PSS, and SSS.

[0224] In this design, the first signal may include the PBCH, or may further include at least one of the PBCH's DMRS, PSS, and SSS. When the synchronization signal block includes the PBCH's DMRS, the PBCH's DMRS may be modulated using a single-carrier modulation technique as the first signal, or may be directly mapped without modulation and serve as neither the first signal nor the second signal.

[0225] In another possible design, the synchronization signal block may not carry the DMRS of the PBCH. For example, the synchronization signal block may refer to Figures 6, 8, 9, and 10 above, and does not include the DMRS of the PBCH.

[0226] In this design, the synchronization signal block does not include the DMRS of the PBCH. The terminal device can use the PSS and / or SSS to complete the PBCH channel estimation, or use the PSS and / or SSS as the reference signal of the PBCH for channel estimation.

[0227] For example, the method further includes: the terminal device performs channel estimation based on the primary synchronization signal and / or the secondary synchronization signal.

[0228] For example, the terminal device can estimate channel parameters such as delay, multipath fading, and frequency offset 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.

[0229] This design can reduce the signaling overhead of the DMRS part of the PBCH and improve the PBCH performance.

[0230] In one possible design, the signal in the synchronization signal block described in the embodiments of the present application is constellation modulated by quadrature phase shift keying (QPSK) or pi / 2 binary phase shift keying (BPSK).

[0231] QPSK is a phase modulation technique that splits a digital data stream into two paths, performs BPSK modulation on each, and then performs quadrature modulation. Specifically, QPSK separates the input bit stream into real and imaginary parts, with each symbol carrying two bits of information. The QPSK modulator maps these two bits to four points in the constellation, corresponding to different phases. Therefore, QPSK can carry more information per symbol, thereby improving spectral efficiency.

[0232] Pi / 2BPSK, also known as π / 2BPSK, is a special BPSK modulation scheme that introduces a π / 2 phase shift. In π / 2BPSK, each symbol carries only one bit of information, but by introducing a π / 2 phase shift, it achieves performance similar to QPSK while reducing hardware complexity.

[0233] In this design, when the first signal is constellation modulated using the pi / 2BPSK method, the peak-to-average ratio can be further reduced and the coverage range of the first signal can be improved.

[0234] Optionally, in an embodiment of the present application, M resource blocks (RBs) may be allocated to each time domain symbol of the synchronization signal block, where M is a positive integer. For example, M may be 22, 24, or 25, and the present 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 may also be the same as the number of RBs in the current NR system, which is 20 RBs.

[0235] Among them, RB is also called physical resource block (PRB), which is the basic unit based on frequency resources in the communication system. A resource block is generally composed of N resource elements (RE), and a resource element is also called a subcarrier. Wherein N is generally 12. In the embodiment of the present application, N can be 12 or other values ​​without limitation. Several resource blocks form a resource block group (RBG), or also called a physical resource block group. In general, 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 may be no less than one resource block group.

[0236] The following uses the three cases where the synchronization signal block includes PSS, SSS and PBCH, and 22 RBs, 24 RBs, and 25 RBs are allocated to each time domain symbol of the synchronization signal block as examples to illustrate the resource mapping relationship (or DFT subcarrier mapping relationship) of the synchronization signal block.

[0237] For example, Table 1 uses an RB including 12 subcarriers as an example and provides a description of the resource mapping relationship (PBCH DFT mapping relationship) of the PBCH in the synchronization signal block for three cases: 22 RBs, 24 RBs, and 25 RBs allocated per time domain symbol. A zero-mapped carrier represents a subcarrier set to zero.

[0238] Table 1

[0239] As shown in Table 1, when 22 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 22 RBs can be numbered 0 to 263, for a total of 264 subcarriers. PBCH can occupy either 256 or 264 subcarriers. When PBCH occupies 256 subcarriers, it can occupy subcarriers numbered 4 to 259, and subcarriers numbered 0 to 3 and 260 to 263 can be set to 0. When PBCH occupies 264 subcarriers, it can occupy subcarriers numbered 0 to 263.

[0240] When 24 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered 0 to 287, for a total of 288 subcarriers. PBCH can occupy either 256 or 288 subcarriers. When PBCH occupies 256 subcarriers, it can occupy subcarriers numbered 16 to 271, and subcarriers numbered 0 to 15 and 272 to 287 can be set to 0. When PBCH occupies 288 subcarriers, it can occupy subcarriers numbered 0 to 287.

[0241] When 25 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 25 RBs can be numbered 0 to 299, for a total of 300 subcarriers. PBCH can occupy either 256 or 300 subcarriers. When PBCH occupies 256 subcarriers, it can occupy subcarriers numbered 22 to 277, and subcarriers numbered 0 to 21 and 278 to 299 can be set to 0. When PBCH occupies 300 subcarriers, it can occupy subcarriers numbered 0 to 299.

[0242] For example, Table 2 takes an RB including 12 subcarriers as an example and provides a description of the resource mapping relationship (PSSDFT mapping relationship) of the PSS in the synchronization signal block for three cases where 22 RBs, 24 RBs, and 25 RBs are allocated per time domain symbol. Here, a zero-mapped carrier represents a subcarrier set to zero.

[0243] Table 2

[0244] In Table 2, the M sequence is also called the maximum length sequence. The M sequence and ZC sequence are sequences used to generate the PSS. The frequency-domain carrier mapping relationship of the PSS is related to the sequence length used by the PSS.

[0245] As shown in Table 2, when 22 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 22 RBs can be numbered from 0 to 263, for a total of 264 subcarriers. When the PSS uses an M sequence with a length of 255, it can occupy 255 subcarriers numbered from 4 to 258. When the PSS uses a ZC sequence with a length of 251, it can occupy 251 subcarriers numbered from 6 to 256. When the PSS uses a ZC sequence with a length of 255, it can occupy 255 subcarriers numbered from 4 to 258. When the PSS uses a ZC sequence with a length of 257, it can occupy 257 subcarriers numbered from 3 to 259. When the PSS uses a ZC sequence with a length of 263, it can occupy 263 subcarriers numbered from 0 to 262.

[0246] When 24 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered 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 8 to 278. When the PSS uses a ZC sequence of length 277, it can occupy 277 subcarriers numbered 5 to 281. When the PSS uses a ZC sequence of length 281, it can occupy 281 subcarriers numbered 3 to 283. When the PSS uses a ZC sequence of length 283, it can occupy 283 subcarriers numbered 2 to 284.

[0247] When 25 RBs are allocated per time-domain symbol, the subcarriers corresponding to these 25 RBs can be numbered from 0 to 299, for a total of 300 subcarriers. When a PSS uses an M sequence of length 255, it can occupy 255 subcarriers numbered 22 to 276. When a PSS uses a ZC sequence of length 251, it can occupy 251 subcarriers numbered 24 to 274. When a PSS uses a ZC sequence of length 255, it can occupy 255 subcarriers numbered 22 to 276. When a PSS uses a ZC sequence of length 257, it can occupy 257 subcarriers numbered 21 to 277. When a PSS uses a ZC sequence of length 263, it can occupy 263 subcarriers numbered 18 to 280. When a PSS uses a ZC sequence of length 269, it can occupy 269 subcarriers numbered 15 to 283. When the PSS uses a ZC sequence of length 271, it can occupy 271 subcarriers numbered from 14 to 284. When the PSS uses a ZC sequence of length 277, it can occupy 277 subcarriers numbered from 11 to 287. When the PSS uses a ZC sequence of length 281, it can occupy 281 subcarriers numbered from 9 to 289. When the PSS uses a ZC sequence of length 283, it can occupy 283 subcarriers numbered from 8 to 290. When the PSS uses a ZC sequence of length 293, it can occupy 293 subcarriers numbered from 3 to 295.

[0248] In Table 2 above, subcarriers whose numbers are not listed can be set to 0. For example, 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 4 to 258. The subcarriers numbered 0 to 3 and 259 to 263 can be set to 0.

[0249] For example, Table 3 takes an RB including 12 subcarriers as an example and provides an explanation of the resource mapping relationship (SSSDFT mapping relationship) of the SSS in the synchronization signal block for three cases where 22 RBs, 24 RBs, and 25 RBs are allocated per time domain symbol. Here, a zero-mapped carrier indicates a subcarrier set to zero.

[0250] Table 3

[0251] In Table 3, the M sequence and 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 used by the SSS.

[0252] As shown in Table 3, when 22 RBs are allocated to each time-domain symbol, the subcarriers corresponding to the 22 RBs can be numbered from 0 to 263, for a total of 264 subcarriers. When SSS uses an M sequence with a length of 255, it can occupy 255 subcarriers numbered from 5 to 259. When SSS uses a ZC sequence with a length of 251, it can occupy 251 subcarriers numbered from 7 to 257. When SSS uses a ZC sequence with a length of 255, it can occupy 255 subcarriers numbered from 5 to 259. When SSS uses a ZC sequence with a length of 257, it can occupy 257 subcarriers numbered from 4 to 260. When SSS uses a ZC sequence with a length of 263, it can occupy 263 subcarriers numbered from 1 to 263.

[0253] When 24 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 24 RBs can be numbered from 0 to 287, for a total of 288 subcarriers. When an SSS uses an M sequence of length 255, it can occupy 255 subcarriers numbered from 17 to 271. When an SSS uses a ZC sequence of length 251, it can occupy 251 subcarriers numbered from 19 to 269. When an SSS uses a ZC sequence of length 255, it can occupy 255 subcarriers numbered from 17 to 271. When an SSS uses a ZC sequence of length 257, it can occupy 257 subcarriers numbered from 16 to 272. When an SSS uses a ZC sequence of length 263, it can occupy 263 subcarriers numbered from 14 to 275. When an SSS uses a ZC sequence of length 269, it can occupy 269 subcarriers numbered from 10 to 278. When SSS uses a ZC sequence of length 271, it can occupy 271 subcarriers numbered 9 to 279. When SSS uses a ZC sequence of length 277, it can occupy 277 subcarriers numbered 6 to 282. When SSS uses a ZC sequence of length 281, it can occupy 281 subcarriers numbered 4 to 284. When SSS uses a ZC sequence of length 283, it can occupy 283 subcarriers numbered 3 to 285.

[0254] When 25 RBs are allocated per time-domain symbol, the subcarriers corresponding to the 25 RBs can be numbered from 0 to 299, for a total of 300 subcarriers. When an SSS uses an M sequence of length 255, it can occupy 255 subcarriers numbered 23 to 277. When an SSS uses a ZC sequence of length 251, it can occupy 251 subcarriers numbered 25 to 275. When an SSS uses a ZC sequence of length 255, it can occupy 255 subcarriers numbered 23 to 277. When an SSS uses a ZC sequence of length 257, it can occupy 257 subcarriers numbered 22 to 278. When an SSS uses a ZC sequence of length 263, it can occupy 263 subcarriers numbered 19 to 281. When an SSS uses a ZC sequence of length 269, it can occupy 269 subcarriers numbered 16 to 284. When SSS uses a ZC sequence of length 271, it can occupy 271 subcarriers numbered 15 to 285. When SSS uses a ZC sequence of length 277, it can occupy 277 subcarriers numbered 12 to 288. When SSS uses a ZC sequence of length 281, it can occupy 281 subcarriers numbered 10 to 290. When SSS uses a ZC sequence of length 283, it can occupy 283 subcarriers numbered 9 to 291. When SSS uses a ZC sequence of length 293, it can occupy 293 subcarriers numbered 4 to 296.

[0255] In Table 3 above, subcarriers whose numbers are not listed can be set to 0. For example, 22 RBs are allocated to each time domain symbol, SSS uses an M sequence with a length of 255, and occupies 255 subcarriers numbered 5 to 259. The subcarriers numbered 0 to 4 and 260 to 263 can be set to 0.

[0256] Tables 1 to 3 above give examples of resource mapping relationships for PBCH, PSS and SSS in the synchronization signal block in three cases: 22 RBs, 24 RBs, and 25 RBs are allocated on each time domain symbol. It should be understood that the examples shown above are only some implementations of the present application. In other implementations, the RBs allocated on each time domain symbol may be fewer or more, and the subcarriers occupied by PBCH, PSS and SSS on the time domain symbols may also be fewer or more than the above examples. Alternatively, the number of subcarriers occupied by PBCH, PSS and SSS respectively can refer to the above examples, but the positions of the subcarriers may be different from the above examples. The present application does not impose any 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.

[0257] For example, in the synchronization signal block, the frequency domain length of the PBCH may be less than or equal to the allocated RB resources, such as the PBCH may occupy all RB resources or 256 subcarriers.

[0258] For another example, the frequency domain length of the PSS sequence may be less than or equal to the allocated RB resources, such as the PSS sequence may be an M sequence of length 255, or a length of ZC sequence.

[0259] in, The specific implementation can be as follows.

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

[0261] in, The specific implementation can be as follows.

[0262] Optionally, the sequence lengths of PSS and SSS may be the same or different.

[0263] Optionally, when the frequency domain lengths of the PSS, SSS and PBCH do not fully occupy the allocated RB resources, they may be mapped to any position of the allocated RB resources, or mapped to an inter-subcarrier.

[0264] For example, in the embodiment of the present application, if the PSS sequence is an M sequence with a length of 255, it can carry cell ID related information. For example, ID2 can reuse the existing protocol, such as referring to the following formulas (1) to (3). pss (n) = 1 - 2x(m) Formula (1). 0≤n<255 formula (3).

[0265] Among them, d pss (n) represents the modulated PSS M sequence, 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 the use of an M sequence with a length of 255; Indicates the identification information of the cell.

[0266] 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 may include the following possibilities: '101110001', '110101001', '111110101', '110001101', '101001101', '100101101', '110000111', '111001111', etc. Each possible tap coefficient corresponds to () mod 2 in the following formula (4). x(i+8)=(x(i+6)+x(i+5)+x(i+4)+x(i))mod2 or x(i+8)=(x(i+7)+x(i+5)+x(i+3)+x(i))mod2 or x(i+8)=(x(i+7)+x(i+6)+x(i+5)+x(i+4)+x(i+2)+x(i))mod2 or x(i+8)=(x(i+7)+x(i+3)+x(i+2)+x(i))mod2 or x(i+8)=(x(i+6)+x(i+3)+x(i+2)+x(i))mod2 or x(i+8)=(x(i+5)+x(i+3)+x(i+2)+x(i))mod2 or x(i+8)=(x(i+7)+x(i+2)+x(i+1)+x(i))mod2 or x(i+8)=(x(i+7)+x(i+6)+x(i+3)+x(i+2)+x(i+1)+x(i))mod2 Formula (4).

[0267] Exemplarily, the initial value of the M sequence is any binary combination of length 8.

[0268] 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)], where x(i) is 0 or 1.

[0269] In a specific example, [x(7)x(6)x(5)x(4)x(3)x(2)x(1)x(0)] = [11110110].

[0270] For example, in the embodiment of the present application, the PSS sequence can also be a ZC sequence, which can be related or unrelated to the cell ID. If it is related, the number of IDs that can be carried is 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 by cyclic shifting under the same u seed. For example, the ZC sequence can refer to the following formulas (5) and (6). u,v (n) = x u ((n+C V )modL PSS ) formula (5).

[0271] Among them, x u represents the expression of the ZC sequence generated under the u seed, i represents the sequence number of the ZC sequence; L PSS Indicates the length of the ZC sequence; C V Indicates the cyclic shift parameter, the value can be 0; x u,v represents the cyclic shift of u seed C V The expression of the generated ZC sequence, where n represents the sequence number of the ZC sequence.

[0272] For example, Three types representing different cell IDs Can be generated by different u seeds, u seeds can be any less than L PSS An integer combination of, for example, u = {2, 56, 138}. Alternatively, it can be C V = {0, 1, 2}, useed can be any value smaller than L PSS An integer, for example, u=138.

[0273] The above examples illustrate 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 be generated using an M sequence similar to the PSS signal. Alternatively, the SSS sequence can be a ZC sequence, which can be related or unrelated to the cell ID. If so, the number of IDs that can be carried is arbitrary.

[0274] For example, the number of existing SSS IDs can be reused. When is 336, 336 different ZC sequences are required, or a value greater than 330 or other values ​​may be used. Different ZC sequences can be generated by different u seeds or by cyclic shifting under the same u seed. For example, the ZC sequence can refer to the following formulas (7) and (8). u,v (n) = x u ((n+C V )modL SSS ) formula (7).

[0275] Among them, x u represents the expression of the ZC sequence generated under the u seed, i represents the sequence number of the ZC sequence; L SSS Indicates the length of the ZC sequence; C V Indicates the cyclic shift parameter, the initial value can be 0; x u,v The expression representing the ZC sequence generated by cyclic shift of the u-seed, where n represents the sequence number of the ZC sequence.

[0276] For example, Represents different cell IDs Can be generated by different u seeds, u seeds can be any less than L SSs Integer combination, for example, u={2,5,...,250}, in which the number of elements in the vector of u is Can be carried equivalently The remaining cells By C V The cyclic shift is generated in the same manner as the cyclic shift of the ZC sequence in the PSS signal mentioned above.

[0277] As described in the foregoing embodiment, in the embodiment of the present application, a synchronization signal block may occupy four time domain symbols, or more or fewer than four 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 or discontinuous in the time domain. Among them, a signal may occupy at least one time domain symbol.

[0278] For example, taking the synchronization signal block including PSS, SSS and PBCH, PSS and SSS occupy one time domain symbol respectively, and PBCH occupies two time domain symbols as an example, Table 4 gives an example of a time domain symbol / resource mapping relationship of the synchronization signal block.

[0279] Table 4

[0280] As shown in Table 4, the channels / signals in the synchronization signal block can include PSS, SSS, and PBCH. In certain cases, there may be subcarriers set to 0, which can be defined or described as "Set to 0." In the example given in Table 4, the PSS can occupy the first time domain symbol numbered 0, the SSS can occupy the third time domain symbol numbered 2, and the PBCH can 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 in the first four time domain symbols.

[0281] It should be understood that the present application does not limit the order or sequence of time domain symbols occupied by different signals in the synchronization signal block.

[0282] In a possible design, in the time domain symbols carrying the synchronization signal block, signals carried by different time domain symbols occupy the same number of resource blocks (RBs) in the frequency domain.

[0283] In this design, any two different time-domain symbols carrying synchronization signal blocks may carry the same type of signal, such as both carrying the PBCH, or different types of signals, such as one carrying the PSS and the other carrying the SSS. The signals carried by any two different time-domain symbols can occupy the same number of RBs in the frequency domain.

[0284] For example, taking the synchronization signal block including PSS, SSS and PBCH, which occupies a total of 4 time domain symbols, PSS occupies the 1st time domain symbol numbered 0, SSS occupies the 3rd time domain symbol numbered 2, PBCH occupies the 2nd time domain symbol numbered 1 and the 4th time domain symbol numbered 3, PSS can occupy 22 RBs in the frequency domain on the 1st time domain symbol, SSS can occupy 22 RBs in the frequency domain on the 3rd time domain symbol, PBCH can occupy 22 RBs in the frequency domain on the 2nd time domain symbol, and PBCH can occupy 22 RBs in the frequency domain on the 4th time domain symbol.

[0285] In one example, each time domain symbol is allocated 22 RBs, and one RB includes 12 subcarriers. The PSS may occupy 22 RBs numbered 0-21 in the first time domain symbol, such as specifically occupying subcarriers numbered 4 to 258. The SSS may also occupy 22 RBs numbered 0-21 in the third time domain symbol, such as specifically occupying subcarriers numbered 5 to 259. The PBCH may also occupy 22 RBs numbered 0-21 in the second time domain symbol, such as specifically occupying subcarriers numbered 4 to 259. The PBCH may also occupy 22 RBs numbered 0-21 in the fourth time domain symbol, such as specifically occupying subcarriers numbered 4 to 259.

[0286] In this design, when signals carried by different time-domain symbols occupy the same number of RBs in the frequency domain, any two different signals occupy the same RBs in a time-domain symbol. For example, the PSS, SSS, and PBCH each occupy the same RBs in a time-domain symbol. This design can improve the accuracy of PBCH channel estimation based on the PSS and / or SSS.

[0287] In one 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 (or serial number).

[0288] Similar to the previous embodiment, in this design, in the time domain symbols carrying the synchronization signal block, for any two different time domain symbols, the two time domain symbols may carry the same type of signal, such as both carrying PBCH, or they 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 can occupy the same number of subcarriers in the frequency domain, and the occupied subcarriers have the same number (position).

[0289] For example, taking the case where 22 RBs are allocated to each time domain symbol, one RB includes 12 subcarriers, the synchronization signal block includes PSS, SSS and PBCH, which occupy a total of 4 time domain symbols, PSS occupies the 1st time domain symbol numbered 0, SSS occupies the 3rd time domain symbol numbered 2, and PBCH occupies the 2nd time domain symbol numbered 1 and the 4th time domain symbol numbered 3 as an example, Figure 12 shows a schematic diagram of the subcarrier mapping relationship of a synchronization signal block provided by an embodiment of the present application. As shown in Figure 12, PSS can occupy 255 subcarriers numbered 4 to 258 on the 1st time domain symbol. SSS can also occupy 255 subcarriers numbered 4 to 258 on the 3rd time domain symbol. PBCH can occupy 255 subcarriers numbered 4 to 258 on the 2nd time domain symbol, and 255 subcarriers numbered 4 to 258 on the 4th time domain symbol. The PSS, SSS, and PBCH each occupy the same number of subcarriers in one time domain symbol, and the occupied subcarriers have the same number.

[0290] 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 number (or number), the signals carried on different time domain symbols occupy the same number of RBs in the frequency domain. On the basis of the fact that the signals carried on different time domain symbols occupy the same number of RBs in the frequency domain, the same number of subcarriers and the same number of occupied subcarriers can further improve the channel estimation performance of the PBCH.

[0291] In another possible design, in the time domain symbols carrying the synchronization signal blocks, 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 similar (greater than 0), such as the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold.

[0292] Exemplarily, subcarriers with different sequence numbers refer to subcarriers whose sequence numbers are not aligned. For example, a signal carried by a time domain symbol occupies 255 subcarriers numbered 4 to 258 in the frequency domain, and a signal carried by another time domain symbol occupies 255 subcarriers numbered 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 the subcarriers with different sequence numbers can be RB numbered 0 and RB numbered 21.

[0293] Optionally, the first threshold may be 2, 3, etc., and this application does not impose any limitation on the size of the first threshold.

[0294] It can be understood that when 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 or different numbers of RBs in the frequency domain. If the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold, the number of RBs with misaligned sequence numbers can also be controlled to be within a range less than the first threshold.

[0295] 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 sequence numbers is less than the first threshold, which can further improve the channel estimation performance of PBCH.

[0296] In another possible design, in the time domain symbols carrying the synchronization signal block, the number of subcarriers occupied by the signals carried by different time domain symbols in the frequency domain is similar, such as 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 similar (greater than 0), such as the number of resource blocks corresponding to subcarriers with different serial numbers is less than the first threshold.

[0297] 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 in the above embodiments and will not be repeated here. The second threshold can be 2, 3, 4, 5, etc., and this application does not limit the size of the second threshold.

[0298] 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 sequence numbers is less than the first threshold, which can also further improve the channel estimation performance of PBCH.

[0299] Optionally, in some other designs, the aforementioned “subcarriers with different numbers correspond to similar numbers of resource blocks” may also be defined as “the number of resource blocks corresponding to subcarriers with different numbers is less than or equal to a first threshold,” or as “in the resource blocks occupied by signals carried by different time-domain symbols in the frequency domain, the number of resource blocks with misaligned numbers is less than or equal to a first threshold,” or as “the number of resource blocks occupied by signals carried by different time-domain symbols in the frequency domain are similar.” This application does not limit the specific implementation of “subcarriers with different numbers correspond to similar numbers of resource blocks.”

[0300] Similarly, the above-mentioned "the number of subcarriers occupied by signals carried by different time domain symbols in the frequency domain is similar" 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.

[0301] Optionally, in an embodiment 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 also include single-carrier quadrature amplitude modulation (SC-QAM) technology, single-carrier frequency domain equalization (SC-FDE) technology, direct sequence spread spectrum (DSSS) technology, etc. Similarly, the multi-carrier modulation technology may also be other technologies similar to the OFDM technology. The present application does not limit the specific implementation of the single-carrier modulation technology and the multi-carrier modulation technology.

[0302] In the embodiment of the present application, in the time domain symbols carrying the first signal, each time domain symbol carries one type of first signal. From the perspective of RB resource mapping shape, this mapping method of the first signal can also be called block mapping.

[0303] Alternatively, the SSB in the current NR system may be defined as an NR SSB. The synchronization signal block proposed in the embodiment of the present application is different from the NR SSB and may be referred to as a first SSB, a block SSB, or other names, without limitation.

[0304] Based on the above embodiments, the embodiments of the present application actually provide methods that can be applied to network devices and terminal devices. Among them, the method applied to the network device can refer to the steps performed by the network device in the above embodiments. The method applied to the terminal device can refer to the steps performed by the terminal device in the above embodiments.

[0305] Optionally, an embodiment of the present application also provides a synchronization signal block, which includes at least one first signal, the first signal is modulated by a single carrier modulation technology, and in the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0306] The specific implementation of the synchronization signal block and its beneficial effects can be found in the above-mentioned embodiments and will not be repeated here.

[0307] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. It is understandable that each network element, such as a network device, a terminal device, etc., includes a hardware structure and / or software module corresponding to each function in order to implement the above functions.

[0308] For example, an embodiment of the present application may provide a communication device for implementing the functions of the above-mentioned network device. The communication device may be a network device or a device built into the network device (e.g., a chip). Figure 13 shows a schematic diagram of the structure of the communication device provided in an embodiment of the present application. As shown in Figure 13, the communication device may include: an acquisition unit 1301 and a sending unit 1302.

[0309] Among them, the acquisition unit 1301 is used to obtain the synchronization signal block.

[0310] The sending unit 1302 is used to send a synchronization signal block.

[0311] The synchronization signal block includes at least one first signal, which is modulated by a single-carrier modulation technology. In the time domain symbols carrying the first signal, each time domain symbol carries one type of first signal.

[0312] In one possible design, the first signal includes a physical broadcast channel.

[0313] 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.

[0314] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0315] In one 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.

[0316] 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.

[0317] Alternatively, in 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.

[0318] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0319] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0320] In one 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.

[0321] In one 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.

[0322] 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 the first threshold.

[0323] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0324] For another example, an embodiment of the present application further provides a communication device for implementing the functions of the above-mentioned terminal device. The communication device can be a terminal device or a device built into the terminal device (e.g., a chip). Figure 14 shows another schematic structural diagram of the communication device provided in an embodiment of the present application. As shown in Figure 14, the communication device may include: a receiving unit 1401 and a processing unit 1402.

[0325] Among them, the receiving unit 1401 is used to receive a synchronization signal block, which includes at least one first signal. The first signal is modulated by a single carrier modulation technology. In the time domain symbols carrying the first signal, each time domain symbol carries a type of first signal.

[0326] The processing unit 1402 is used to synchronize according to the synchronization signal block.

[0327] In one possible design, the first signal includes a physical broadcast channel.

[0328] 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.

[0329] Optionally, in some implementations, the synchronization signal block also includes at least one second signal, and the second signal is modulated by a multi-carrier modulation technology.

[0330] In one 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.

[0331] 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.

[0332] Alternatively, in 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.

[0333] In one possible design, the first signal described in any of the above designs also includes a demodulation reference signal of a physical broadcast channel.

[0334] In one possible design, the processing unit 1402 is further used to perform channel estimation based on the primary synchronization signal and / or the secondary synchronization signal.

[0335] In one possible design, the signal in the synchronization signal block is constellation modulated by orthogonal phase shift keying or pi / 2 binary phase shift keying.

[0336] In one 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.

[0337] In one 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.

[0338] 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 the first threshold.

[0339] Alternatively, in 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 the second threshold, and the number of resource blocks corresponding to subcarriers with different sequence numbers is less than the first threshold.

[0340] It should be understood that the division of units in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a single physical entity, or physically separated. Furthermore, the units in the device may be implemented entirely in the form of software invoked through processing elements, entirely in the form of hardware, or partially in the form of software invoked through processing elements, while others may be implemented in the form of hardware.

[0341] For example, each unit can be a separately established processing element, or it can be integrated into a certain chip of the device for implementation. In addition, it can also be stored in a memory in the form of a program, and called by a certain processing element of the device to execute the function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units can be implemented by the integrated logic circuit of the hardware in the processor element or in the form of software called by the processing element.

[0342] In one example, the unit in any of the above devices can be one or more integrated circuits configured to implement the above method, such as: 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.

[0343] For another example, when the units in the device can be implemented in the form of a processing element scheduling program, the processing element can be a general-purpose processor, such as a CPU or other processor that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0344] The above-mentioned unit for receiving is an interface circuit or input circuit of the device, which 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 the interface circuit or input circuit of the chip used to receive signals from other chips or devices. When the communication device includes a unit for sending, the unit for sending is an interface circuit or output circuit of the device, which 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 the interface circuit or output circuit of the chip used to send signals to other chips or devices.

[0345] For example, an embodiment of the present application may further provide a communication device, which may include: a processor and an interface circuit. The processor may include one or more processors.

[0346] 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 the various steps executed by the network device in the above method.

[0347] 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 the various steps executed by the terminal device in the above method.

[0348] In one implementation, the units for implementing the corresponding steps in the above methods in a network device or terminal device can be implemented in the form of a processing element scheduler. For example, an apparatus for a network device or terminal device may include a processing element and a storage element, with the processing element invoking a program stored in the storage element to execute the method executed 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, i.e., an on-chip storage element.

[0349] In another implementation, the program for executing the method executed by the network device or terminal device in the above method can be stored in a memory element on a different chip from the processing element, i.e., an off-chip memory element. In this case, the processing element calls or loads the program from the off-chip memory element to the on-chip memory element to call and execute the method executed by the corresponding network device or terminal device in the above method embodiment.

[0350] For example, an embodiment of the present application may further provide a communication device, which may include a processor configured to execute computer instructions stored in a memory. When the computer instructions are executed, the device performs the method performed by the above network device or terminal device. The memory may be located within or outside the communication device. The processor may include one or more processors.

[0351] In another implementation, the unit that implements each step of the above method in a network device or terminal device may be configured as one or more processing elements. These processing elements may be correspondingly provided on the network device or terminal device. The processing elements here may be integrated circuits, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these integrated circuits. These integrated circuits may be integrated together to form a chip.

[0352] The units of a network device or terminal device that implement each step of the above method can be integrated together and implemented in the form of a SOC chip, which is used to implement the corresponding method. The chip can integrate at least one processing element and a storage element, and the corresponding method can be implemented by the processing element calling a program stored in the storage element; alternatively, the chip can integrate at least one integrated circuit to implement the corresponding method; or, a combination of the above implementation methods can be used, with the functions of some units implemented by the processing element calling a program, and the functions of some units implemented by the integrated circuit.

[0353] The processing element here is the same as described above, and can be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: 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.

[0354] A storage element may be a memory or a collective term for multiple storage elements.

[0355] For example, an embodiment of the present application also provides 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 circuit and the processor are interconnected by lines; the processor receives and executes computer instructions from the memory of the electronic device through the interface circuit to implement the method executed by the corresponding network device or terminal device in the above method embodiment. Among them, the electronic device can be a network device or a terminal device, or a device in a network device or a terminal device, or it can also be other devices that communicate with the network device or the terminal device.

[0356] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0357] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0358] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0359] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0360] If the 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 embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, such as a program. The software product is stored in a program product, such as a computer-readable storage medium, and includes a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0361] For example, an embodiment of the present application may also provide a computer-readable storage medium, including: computer software instructions; when the computer software instructions are executed, the steps performed by the network device or terminal device in the method described in the above embodiment are implemented.

[0362] Exemplarily, when the computer software instructions are executed in the network device or a device (eg, a chip) built into the network device, the network device is enabled to implement the steps performed by the network device in the aforementioned embodiments.

[0363] Alternatively, when the computer software instructions are executed in the terminal device or a device (eg, a chip) built into the terminal device, the terminal device implements the steps performed by the terminal device in the aforementioned embodiment.

[0364] Optionally, an embodiment of the present application further provides a communication device. The communication device may include a transceiver unit and a processing unit. The transceiver unit may be used to send and receive information or to communicate with other network elements. The processing unit may be used to process data. For example, the device may implement the method performed by the aforementioned network device or terminal device using the transceiver unit and the processing unit.

[0365] Optionally, an embodiment of the present application further provides a computer program product, which, when executed, can implement the method executed by the above-mentioned network device or terminal device.

[0366] Based on the above embodiments, embodiments of the present application further provide a communication system, comprising: a network device and a terminal device. The network device executes the steps performed by the network device in the method described in the above embodiments. The terminal device executes the steps of the method described in the above embodiments corresponding to the interaction with the network device.

[0367] Illustratively, an embodiment of the present application further provides a network device that can be used to implement the method performed by the network device in the aforementioned embodiment.

[0368] Illustratively, an embodiment of the present application further provides a terminal device that can be used to implement the method performed by the terminal device in the aforementioned embodiment.

[0369] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the 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.

[0370] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A 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 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.

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, wherein The synchronization signal block further includes at least one second signal, which is modulated by a multi-carrier modulation technique.

4. The method according to claim 3, 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.

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 modulated by a constellation in an orthogonal phase shift keying manner or a pi / 2 binary phase shift keying manner.

7. The method according to any one of claims 1 to 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 to 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 subcarriers have the same sequence numbers; 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 sequence 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 sequence numbers is less than the first threshold.

9. A communication method, characterized in that, The method includes: Receiving a synchronization signal block, where the synchronization signal block includes at least one first signal, which 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; Performing synchronization according to the synchronization signal block.

10. The method according to claim 9, 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.

11. The method according to claim 9, characterized in that, The synchronization signal block further includes at least one second signal, which is modulated by a multi-carrier modulation technique.

12. The method according to claim 11, 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.

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 π / 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, wherein 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 π / 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, characterized in that, 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, which is modulated by a multicarrier modulation technique.

29. The device according to claim 28, wherein 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 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 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 the subcarriers with different serial 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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