CN111866792A

CN111866792A - Signal sending and receiving method and terminal

Info

Publication number: CN111866792A
Application number: CN201910353484.0A
Authority: CN
Inventors: 任晓涛; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-10-30
Anticipated expiration: 2039-04-29
Also published as: CN111866792B

Abstract

The invention discloses a method and a terminal for sending and receiving signals, wherein the method for sending the signals comprises the following steps: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals. The scheme of the invention can improve the performance of frequency offset estimation by using the SSS sequence at the receiving side, thereby improving the decoding success rate performance of the PSBCH and reducing the initial access time delay.

Description

Signal sending and receiving method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and a terminal for transmitting and receiving a signal.

Background

In a 5G NR (NR Radio Access, new Radio Access technology) V2X system, terminals use a PC5 port (Sidelink) for direct communication with each other. Before the service data transmission, synchronization is established between two terminals which need to communicate first at port PC5 (Sidelink). The method for establishing synchronization is that one terminal A sends synchronization and broadcast signals, the other terminal B receives the synchronization and broadcast signals sent by the terminal A, once the terminal B successfully receives and demodulates, the two terminals can establish synchronization, and preparation is made for the next step of direct communication.

When NR V2X Sidelink is used to transmit synchronization information, SSB beam scanning is also needed, and SSB on the Sidelink is called S-SSB. The SSB pattern includes a Sidelink primary synchronization signal S-PSS, a Sidelink secondary synchronization signal S-SSS, and a Sidelink broadcast channel PSBCH. To reduce complexity, the transmission of the S-SSB may not take the form of beam scanning, but instead may transmit an omni-directional beam once or repeat the same beam multiple times.

For the V2X sildelink communication link, since both communication parties of the communication link may be in high-speed motion and the distance may change rapidly, the decoding success rate performance of the sildelink broadcast channel PSBCH is a bottleneck of the sildelink communication link, and in high-speed motion of both the sildelink communication transceivers, the decoding success rate of the PSBCH is still low due to the doppler shift, which results in high initial access delay.

Disclosure of Invention

The embodiment of the invention provides a signal sending and receiving method and a terminal, so that the performance of frequency offset estimation by using an SSS sequence can be improved, the decoding success rate performance of a direct link broadcast channel PSBCH of a terminal at a receiving side is improved, and the initial access delay is reduced.

In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:

a signal transmission method is applied to a terminal, and comprises the following steps:

in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

Preferably, the two OFDM symbols occupied by the SSS are spaced by 3 OFDM symbols, 6 OFDM symbols, or 9 OFDM symbols.

Preferably, the sequence used by the SSS transmitted in two OFDM symbols is a pseudo-random PN sequence or a constant envelope zero auto-correlation CAZAC sequence; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

Preferably, under the CP-OFDM waveform, the SSB further includes a DMRS, wherein an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are arranged at intervals with subcarriers occupied by the PBCH in the frequency domain.

Preferably, under the cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or the orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread spectrum, the OFDM symbol on which the PBCH is located does not include the demodulation pilot reference signal DMRS.

Preferably, under the DFT-s-OFDM waveform of the DFT, the SSB further comprises a demodulation pilot reference signal (DMRS), OFDM symbols occupied by the DMRS in the time domain and OFDM symbols occupied by the PSBCH in the time domain are arranged at intervals, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

Preferably, the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.

The embodiment of the invention provides a signal receiving method which is applied to a terminal and comprises the following steps:

receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

Preferably, under a CP-OFDM waveform, the SSB further includes a DMRS, the OFDM symbol occupied by the DMRS in the time domain is the same as the OFDM symbol occupied by the PBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

Preferably, under the waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM spread by discrete fourier transform, the OFDM symbol where PBCH is located does not include demodulation pilot reference signal DMRS, the terminal performs channel estimation using SSS to obtain a channel estimation value, and performs decoding of PBCH using the channel estimation value.

Preferably, under an OFDM-s-OFDM waveform of discrete fourier transform spread spectrum, the SSB further includes a demodulation pilot reference signal DMRS, where OFDM symbols occupied by the DMRS in the time domain and OFDM symbols occupied by the PSBCH in the time domain are arranged at intervals, subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

An embodiment of the present invention further provides a signal transmitting apparatus, including:

the receiving and sending module is used for sending a synchronous signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two discontinuous Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

An embodiment of the present invention further provides a signal receiving apparatus, including:

a transceiver module, configured to receive a synchronization signal block SSB in a timeslot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The embodiment of the invention has the beneficial effects that:

in the above embodiment of the present invention, the synchronization signal block SSB is transmitted in the time slot; the SSS in the SSB occupies two discontinuous orthogonal frequency division multiplexing, OFDM, symbol transmissions. Therefore, the performance of frequency offset estimation by using the S-SSS sequence can be improved, the decoding success rate performance of the PSBCH of the direct link broadcast channel of the receiving side terminal is improved, and the initial access time delay is reduced.

Drawings

FIG. 1 is a schematic diagram of a 5G NR synchronization signal block design;

fig. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention;

fig. 3 to fig. 11 are schematic diagrams illustrating the design schemes of the transmission patterns of the synchronization signal blocks according to the embodiment of the present invention;

FIG. 12 is a flow chart of the signal reception provided by the embodiment of the present invention;

fig. 13 is a schematic diagram of the architecture of the terminal according to the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1, for the V2X scellink synchronization broadcast information design diagram, before the UE is ready to perform service transmission on scellink, it needs to synchronize on scellink first, and in order to expand the coverage of the synchronization signal, it needs to perform time domain repetition of P-SSS/S-SSS signal to enhance the detection performance of the synchronization signal. As shown in fig. 1, the abscissa is the time domain, and each column represents one OFDM (orthogonal frequency division multiplexing) symbol. The ordinate is the frequency domain, which is 6RB (resource block) in the figure. One Slot accommodates a Synchronization Signal Block (SSB) including a P-SSS (physical through link primary synchronization signal), an S-SSS (physical through link secondary synchronization signal), a PSBCH (physical through link broadcast channel), and a necessary DMRS (demodulation pilot reference signal).

As shown in fig. 2, an embodiment of the present invention provides a signal sending method, applied to a terminal, where the method includes:

step 21, in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals. Therefore, the performance of frequency offset estimation by using the S-SSS sequence can be improved, the decoding success rate performance of the PSBCH of the direct link broadcast channel of the receiving side terminal is improved, and the initial access time delay is reduced.

In the embodiment of the invention, the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH. Preferably, the two OFDM symbols occupied by the SSS are spaced by 3 OFDM symbols, 6 OFDM symbols, or 9 OFDM symbols. In the embodiment of the present invention, two OFDM symbols occupied by the SSS may further be separated by 1 OFDM symbol, 2 OFDM symbols, 4 OFDM symbols, 5 OFDM symbols, 7 OFDM symbols, or 8 OFDM symbols; sequences used by SSS transmitted in two OFDM symbols are pseudo-random PN sequences or constant envelope zero autocorrelation CAZAC sequences; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

In one implementation, under a CP-OFDM (cyclic prefix-orthogonal frequency division multiplexing) waveform, the SSB further includes a demodulation pilot reference signal DMRS, the OFDM symbol occupied by the DMRS in the time domain is the same as the OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are spaced apart from subcarriers occupied by the PBCH in the frequency domain.

As shown in fig. 3, in a CP-OFDM waveform, one slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #10, PSBCH is located in symbols #4 to #9, a DMRS embedded in a comb is included in a symbol where the PSBCH is located, and a receiving terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced 6 symbols apart in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 6 symbols in the time domain, and the two S-SSS separated by 6 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH.

As shown in fig. 4, in a CP-OFDM waveform, one slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #7, PSBCH is located in symbols #4 to #6, and symbols #8 to #10, the PSBCH includes DMRS embedded in a comb shape on the symbol, and a receiving terminal uses the DMRS and S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 3 symbols in the time domain, and the two S-SSS separated by 3 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH.

As shown in fig. 5, in a CP-OFDM waveform, one slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #4 and #8, PSBCH is located in symbols #3, #5 to #7, and symbols #9 to #10, the PSBCH includes a comb-embedded DMRS on the symbol, and a receiving terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

As shown in fig. 6, in a CP-OFDM waveform, one slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #5 and #9, PSBCH is located in symbols #3 to #4, and #6 to #8, and a symbol 10, the PSBCH includes a DMRS embedded in a comb shape on the symbol, and a receiving terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

As shown in fig. 7, in a CP-OFDM waveform, one slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #6 and #10, PSBCH is located in symbols #3 to #5, and symbols #7 to #9, the PSBCH includes DMRS embedded in a comb shape on a symbol, and a receiving terminal uses the DMRS and S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In another implementation of the invention, under the CP-OFDM or DFT-s-OFDM waveform, the OFDM symbol on which the PBCH is located does not include a demodulation pilot reference signal (DMRS).

As shown in fig. 8, in a CP-OFDM waveform or DFT-S-OFDM waveform, one S-SSB is included in one slot, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #10, PSBCH is located in symbols #4 to #9, and a DMRS is not included in the symbol on which the PSBCH is located, the S-SSS is used for channel estimation, and the channel estimation value is used for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced 6 symbols apart in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 6 symbols in the time domain, and the two S-SSS separated by 6 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH. In addition, since the S-SSB pattern does not include any DMRS, it can be applied to both the CP-OFDM waveform and the DFT-S-OFDM waveform.

As shown in FIG. 9, in a CP-OFDM waveform or DFT-S-OFDM waveform, one S-SSB is included in one slot, S-PSS is located at symbols #1 and #2, S-SSS is located at symbols #3 and #7, PSBCH is located at symbols #4 to #6, and symbols #8 and # 10. And the symbol on which the PSBCH is positioned does not comprise the DMRS, the S-SSS is used for channel estimation, and the channel estimation value is used for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 3 symbols in the time domain, and the two S-SSS separated by 3 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH. In addition, since the S-SSB pattern does not include any DMRS, it can be applied to both the CP-OFDM waveform and the DFT-S-OFDM waveform.

In still another implementation of the present invention, under a DFT-s-OFDM (discrete fourier transform spread orthogonal frequency division multiplexing multiple access) waveform, the SSB further comprises a demodulation pilot reference signal DMRS, wherein OFDM symbols occupied by the DMRS in a time domain are arranged at intervals from OFDM symbols occupied by the PSBCH in a time domain, and subcarriers occupied by the DMRS in a frequency domain are the same as subcarriers occupied by the PBCH in a frequency domain.

As shown in FIG. 10, in a DFT-S-OFDM waveform, one S-SSB is included in one slot, with S-PSS located at symbols #1 and #2, S-SSS located at symbols #3 and #10, PSBCH located at symbols #4 and #6, and symbols #8 and # 10. DMRSs are located in symbols #5 and #7, channel estimation is performed using the DMRSs and the S-SSS, and decoding of the PSBCH is performed using the channel estimation value. And the S-SSS on the two symbols repeatedly transmitted is spaced 6 symbols apart in the time domain.

As shown in FIG. 11, in a DFT-S-OFDM waveform, one S-SSB is included in one slot, with S-PSS located at symbols #1 and #2, S-SSS located at symbols #3 and #7, PSBCH located at symbols #4 and #6, and symbols #8 and # 10. DMRSs are located in symbols #5 and #9, channel estimation is performed using the DMRSs and the S-SSS, and decoding of the PSBCH is performed using the channel estimation value. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In the above embodiments of the present invention, in fig. 3 to 11, the PSXCH includes: at least one of PSCCH (Physical Sidelink control Channel), PSCCH (Physical Sidelink Shared Channel), and PSFCH (Physical Sidelink feedback Channel), where the PSBCH occupies 6 OFDM symbols in the time domain and 11RB in the frequency domain, but the PSBCH of the present invention is not limited to occupying 6 OFDM symbols and 11 RB. In the above embodiments of the present invention, the SSB occupies two discontinuous OFDM symbols transmitting the S-SSS, and the symbols of the two transmitted S-SSS are spaced by 3 symbols, 6 symbols, or 9 symbols in the time domain. By adopting the technology, the performance of frequency offset estimation by using the S-SSS sequence can be improved, the decoding success rate performance of the PSBCH of the direct link broadcast channel of the receiving side terminal is further improved, and the initial access time delay is reduced.

As shown in fig. 12, an embodiment of the present invention further provides a signal receiving method, which is applied to a terminal, and the method includes:

step 121, receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

Preferably, the two OFDM symbols occupied by the SSS are spaced by 3 OFDM symbols, 6 OFDM symbols, or 9 OFDM symbols. The two OFDM symbols occupied by the SSS may be separated by 1 OFDM symbol, 2 OFDM symbols, 4 OFDM symbols, 5 OFDM symbols, 7 OFDM symbols, or 8 OFDM symbols.

Preferably, under the CP-OFDM waveform, the SSB further includes a demodulation pilot reference signal DMRS, where an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain are arranged at intervals with subcarriers occupied by the PBCH in the frequency domain, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

Preferably, under the CP-OFDM or DFT-s-OFDM waveform, the OFDM symbol where the PBCH is located does not include a demodulation pilot reference signal DMRS, and the terminal performs channel estimation using SSS to obtain a channel estimation value and performs decoding of the PBCH using the channel estimation value.

Preferably, under the DFT-s-OFDM waveform, the SSB further includes a demodulation pilot reference signal DMRS, where OFDM symbols occupied by the DMRS in the time domain and OFDM symbols occupied by the PSBCH in the time domain are arranged at intervals, subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, and the terminal performs channel estimation using the DMRS and the SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

It should be noted that the embodiments shown in fig. 3 to 11 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved.

As shown in fig. 13, an embodiment of the present invention further provides a terminal 130, including: a processor 132, a transceiver 131, and a memory 133, wherein the memory 133 stores programs executable by the processor 132, and the processor 132 implements the following when executing the programs: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

Preferably, under the CP-OFDM waveform, the SSB further includes a demodulation pilot reference signal DMRS, where OFDM symbols occupied by the DMRS in the time domain are the same as OFDM symbols occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are arranged at intervals with subcarriers occupied by the PBCH in the frequency domain.

Preferably, under the CP-OFDM or DFT-s-OFDM waveform, the OFDM symbol on which the PBCH is located does not include a demodulation pilot reference signal (DMRS).

Preferably, under the DFT-s-OFDM waveform, the SSB further comprises a demodulation pilot reference signal DMRS, wherein OFDM symbols occupied by the DMRS in the time domain are arranged at intervals from OFDM symbols occupied by the PSBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

In the terminal, the transceiver 131 and the memory 133, and the transceiver 131 and the processor 132 may be communicatively connected through a bus interface, and the function of the processor 132 may also be implemented by the transceiver 131, and the function of the transceiver 131 may also be implemented by the processor 132. The embodiments shown in fig. 3 to 11 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved.

the receiving and sending module is used for sending a synchronous signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

a transceiver module, configured to receive a synchronization signal block SSB in a timeslot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform a method as described above with respect to fig. 2 or 12.

In the above embodiments of the present invention, the SSB occupies two discontinuous OFDM symbols transmitting the S-SSS, and the symbols of the two transmitted S-SSS are spaced by 3 symbols, 6 symbols, or 9 symbols in the time domain. By adopting the technology, the performance of frequency offset estimation by using the S-SSS sequence can be improved, the decoding success rate performance of the PSBCH is further improved, and the initial access time delay is reduced.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for transmitting a signal, applied to a terminal, the method comprising:

2. The method according to claim 1, wherein the SSS occupies two OFDM symbols spaced apart by 3 OFDM symbols, 6 OFDM symbols, or 9 OFDM symbols.

3. The method according to claim 1, wherein the sequence used by the SSS transmitted in two OFDM symbols is a pseudo-random PN sequence or a constant envelope zero auto-correlation CAZAC sequence; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

4. The method according to any of claims 1 to 3, wherein, in a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform, the SSB further comprises a demodulation pilot reference signal (DMRS), the OFDM symbol occupied by the DMRS in the time domain is the same as the OFDM symbol occupied by the PBCH in the time domain, and the subcarriers occupied by the DMRS in the frequency domain are arranged at intervals from the subcarriers occupied by the PBCH in the frequency domain.

5. The method according to any of claims 1 to 3, wherein the PBCH is located on OFDM symbols without DMRS on the OFDM waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or discrete Fourier transform spread orthogonal frequency division multiplexing multiple Access DFT-s-OFDM.

6. The method according to any one of claims 1 to 3, wherein, in the DFT-s-OFDM waveform of DFT-spread, OFDM, the SSB further comprises a DMRS, the DMRS occupying OFDM symbols in the time domain being spaced apart from the PSBCH occupying OFDM symbols in the time domain, and the DMRS occupying the same subcarriers in the frequency domain as the PBCH occupying subcarriers in the frequency domain.

7. The method of claim 1, wherein the SSB is a through-link synchronization signal block S-SSB, the PSS is a through-link primary synchronization signal S-PSS, the SSS is a through-link secondary synchronization signal S-SSS, and the PBCH is a through-link physical broadcast channel PSBCH.

8. A signal receiving method, applied to a terminal, the method comprising:

9. The method of receiving a signal according to claim 8, wherein the SSS occupies 3 OFDM symbols, 6 OFDM symbols, or 9 OFDM symbols between two OFDM symbols.

10. The method for receiving a signal according to claim 8, wherein the sequence used by the SSS transmitted in two OFDM symbols is a pseudo-random PN sequence or a constant envelope zero auto-correlation CAZAC sequence; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

11. The method of receiving signals according to any of claims 8 to 10, wherein, in a CP-OFDM waveform, the SSB further comprises a DMRS, an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain are spaced apart from subcarriers occupied by the PBCH in the frequency domain, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

12. The method for receiving signals according to any one of claims 8 to 10, wherein, in the OFDM waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or OFDM-multiple access DFT-s-OFDM spread spectrum, the PBCH is located on an OFDM symbol without including a demodulation pilot reference signal DMRS, and the terminal performs channel estimation using SSS to obtain a channel estimation value and performs decoding of PBCH using the channel estimation value.

13. The method of receiving signals according to any of claims 8 to 10, wherein, in an OFDM-s-OFDM waveform of DFT-spread, the SSB further comprises a DMRS, which occupies OFDM symbols in the time domain spaced apart from OFDM symbols occupied by the PSBCH, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, and wherein the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

14. The method of receiving signals of claim 8, wherein the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.

15. A terminal, comprising: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

16. The terminal of claim 15, wherein the SSS occupies 3, 6, or 9 OFDM symbols apart between two OFDM symbols.

17. The terminal of claim 15, wherein the sequence used for SSS transmitted in two OFDM symbols is a pseudo-random PN sequence or a constant amplitude zero auto-correlation CAZAC sequence; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

18. The terminal according to any of claims 15 to 17, characterized in that under cyclic prefix-orthogonal frequency division multiplexing, CP-OFDM, waveforms, the SSB further comprises a demodulation pilot reference signal, DMRS, occupying the same OFDM symbols in the time domain as the PBCH occupies in the time domain, subcarriers of the DMRS occupying the frequency domain being spaced apart from subcarriers of the PBCH occupying the frequency domain.

19. The terminal according to any of claims 15 to 17, characterized in that under cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread, the PBCH is located on OFDM symbols that do not comprise demodulation pilot reference signals, DMRS.

20. The terminal of any one of claims 15 to 17, wherein the SSB further comprises, in an orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread spectrum, a demodulation pilot reference signal DMRS occupying OFDM symbols in the time domain spaced apart from OFDM symbols occupied by the PSBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain being the same as subcarriers occupied by the PBCH in the frequency domain.

21. The terminal of claim 15, wherein the SSB is a through-link synchronization signal block S-SSB, wherein the PSS is a through-link primary synchronization signal S-PSS, wherein the SSS is a through-link secondary synchronization signal S-SSS, and wherein the PBCH is a through-link physical broadcast channel PSBCH.

22. An apparatus for transmitting a signal, comprising:

23. A terminal, comprising: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the SSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, at least one OFDM symbol is arranged between the two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signal.

24. The terminal of claim 23, wherein the SSS occupies 3, 6, or 9 OFDM symbols apart between two OFDM symbols.

25. The terminal of claim 23, wherein the sequence used for SSS transmitted in two OFDM symbols is a pseudo-random PN sequence or a constant amplitude zero auto-correlation CAZAC sequence; the pseudo-random PN sequence comprises: at least one of Gold sequences generated by different generator polynomials, Gold sequences generated by different cyclic shifts, and M-sequences; the constant-envelope zero-autocorrelation CAZAC sequence comprises a ZC sequence.

26. The terminal according to any of claims 23 to 25, wherein, in a cyclic prefix-orthogonal frequency division multiplexing, CP-OFDM, waveform, the SSB further comprises a demodulation pilot reference signal, DMRS, occupying the same OFDM symbols in the time domain as the PBCH occupies in the time domain, subcarriers occupied by the DMRS in the frequency domain being spaced apart from subcarriers occupied by the PBCH in the frequency domain.

27. The terminal according to any of claims 23 to 25, characterized in that, under cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread, the PBCH is located on OFDM symbols that do not comprise demodulation pilot reference signals, DMRS.

28. The terminal of any one of claims 23 to 25, wherein the SSB further comprises, in an orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread spectrum, a demodulation pilot reference signal, DMRS, wherein OFDM symbols occupied by the DMRS in the time domain are spaced apart from OFDM symbols occupied by the PSBCH in the time domain, and wherein subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

29. The terminal of claim 23, wherein the SSB is a direct link synchronization signal block S-SSB, wherein the PSS is a direct link primary synchronization signal S-PSS, wherein the SSS is a direct link secondary synchronization signal S-SSS, and wherein the PBCH is a direct link physical broadcast channel PSBCH.

30. An apparatus for receiving a signal, comprising:

31. A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 7 or the method of any of claims 8 to 14.