CN110784844B

CN110784844B - Signal transmission method and communication device

Info

Publication number: CN110784844B
Application number: CN201810858470.XA
Authority: CN
Inventors: 刘思綦; 纪子超; 吴凯; 周帅
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-07-31
Filing date: 2018-07-31
Publication date: 2021-09-14
Anticipated expiration: 2038-07-31
Also published as: CN110784844A

Abstract

The embodiment of the invention provides a signal transmission method and communication equipment, wherein the signal transmission method comprises the following steps: obtaining a first synchronous grid of a preset working frequency band; transmitting or receiving a synchronization signal on the first synchronization grid; the preset working frequency band is a working frequency band of a preset service, and the preset service is a sidelink service, an mMTC service, an NB-IoT service or an IAB service; or, the preset working frequency band is an unauthorized frequency band. According to the embodiment of the invention, the position of the frequency domain for sending or receiving the synchronous signal can be quickly determined, and the communication efficiency is improved.

Description

Signal transmission method and communication device

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a signal transmission method and communication equipment.

Background

The working frequency band of the sidelink (sidelink) service may overlap with the working frequency bands of other networks or the working frequency bands of other services, and at this time, the time-frequency position of the synchronization signal of the sidelink service may overlap with the time-frequency position of the synchronization signal of other networks or other services, so that the user may select an incorrect synchronization signal, and the sidelink service cannot be performed quickly or even normally.

In unlicensed-Assisted Access (LAA), since an unlicensed frequency band is shared by multiple technologies, before sending information, a sending node (network side device or terminal) needs to perform idle channel assessment (CCA/eCCA for short) to monitor a channel, that is, perform energy detection (ED for short), and when energy is lower than a certain threshold, the channel is determined to be empty, so that transmission can be started. After listening to the channel and determining that the channel is empty, the duration of the signal sent by the terminal needs to be less than a maximum channel occupancy time (MCOT for short). That is to say, in the unlicensed frequency band, a plurality of transmitters need to acquire resources after successful contention and use the resources for transmitting signals, so that the resources that the transmitters can actually acquire are uncertain.

Disclosure of Invention

Embodiments of the present invention provide a signal transmission method and a communication device, so as to solve a problem of low communication efficiency caused by an inability to quickly determine a position of a frequency domain for transmitting or receiving a synchronization signal in some working frequency bands.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a signal transmission method applied to a communication device, where the method includes:

obtaining a first synchronous grid of a preset working frequency band;

transmitting or receiving a synchronization signal on the first synchronization grid;

the preset working frequency Band is a working frequency Band of a preset service, and the preset service is a sidelink service, a Massive Machine Type Communication (mtc) service, a narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) service or an Integrated Access Backhaul (IAB) service; or, the preset working frequency band is an unauthorized frequency band.

In a second aspect, an embodiment of the present invention provides a communication device, including:

the acquisition module is used for acquiring a first synchronous grid of a preset working frequency band;

a first transmission module for transmitting or receiving a synchronization signal on the first synchronization grid;

the preset working frequency band is a working frequency band of a preset service, and the preset service is a sidelink service, an mMTC service, an NB-IoT service or an IAB service; or, the preset working frequency band is an unauthorized frequency band.

In a third aspect, an embodiment of the present invention provides a communication device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the signal transmission method described above.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the signal transmission method described above.

In the embodiment of the invention, the position of the frequency domain for transmitting or receiving the synchronous signal can be quickly determined, and the communication efficiency is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic flow chart of a signal transmission method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a communication device according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

First, the relevant content of the operating band of the NR network will be briefly described.

1. Operating frequency band of NR network

The NR network defines a part of the operating band and its frequency domain range as follows:

TABLE 1 NR operating bands in the frequency range FR1 (NR operating bands in FR1)

2. The NR network introduces a large bandwidth, and the bandwidth can reach 400MHz or even 1GHz on a high frequency band.

3. Synchronous grid (sync raster)

NR networks define a synchronization grid for 0-100GHz, synchronous signal blocks (SS Block SSB for short,may also be referred to as a synchronization signal/physical broadcast signal block, SS/PBCH block) is SS_REFCorresponding to the global synchronization grid number (GSCN). The base station may transmit the synchronization signal blocks on a synchronization grid. The positions and calculations of GSCNs in different frequency domain ranges are as follows:

table 2: parameters of GSCN for the Global frequency raster of Global synchronization grid (GSCN parameters for the Global frequency raster)

For example, when GSCN is 2, it can be deduced that N is 1M is 1, and thus the corresponding frequency domain position is 1250 kHz.

According to the frequency domain planning of NR in Rel-15 and according to different subcarrier spacing (SCS for short), supportable channel bandwidths are defined for different operating frequency bands, respectively, and the following table is related information of channel bandwidth of band n 1. For example, for band n1, when the SCS of the transmitted data/control signal is 15kHz, the minimum channel bandwidth on this band is 5MHz.

Table 3: channel bandwidth of NR working frequency band (Channel bandwidth for reach NR band)

The range of the GSCN and the stepsize, which is the step size of the GSCN belonging to the band and adjacent synchronization grid (i.e. the difference in GSCN), are defined in the NR for different bands. For example, the GSCN range for n41 is 6246-6714, the stepsize is 3, and the GSCN range for n41 is 6246, 6249, … …, 6714.

It should be noted that there may be overlap in frequency domain between different bands, such as bands n38 and n41. as can be seen from the table below, these two bands are overlapping but GSCN's stepsize is different.

TABLE 4 application SS rasters entries per operating band

4. Channel grid (channel raster)

NR defines a channel grid on which the base station can deploy channels. The channel grid may be 100kHz,15kHz,30kHz,60kHz,120 kHz.

For example, in the following table, the Channel grid on the band n1 is 100kHz, the New Radio Absolute Radio Frequency Channel Number (NR-ARFCN) Number range corresponding to the uplink Frequency domain is 384000-. An NR-ARFCN number may also be used to indicate a frequency domain location.

Table 5: applicable NR-ARFCN per operating band

It is noted that there may be an overlap in the frequency domain between different bands, e.g. bands n38 and n41. as can be seen from the table below, the two bands differ in terms of stepsize of the NR-ARFCN, although there is an overlap.

TABLE 6 Applicable NR-ARFCN per operating band

To avoid the problem that the frequency domain position of the synchronization signal for transmitting or receiving the synchronization signal cannot be determined quickly due to the overlapping of the synchronization signal of some operating frequency bands (operating frequency bands of sidelink service, unlicensed frequency bands, etc.) and the frequency domain position of the synchronization signal of the NR network, please refer to fig. 1, an embodiment of the present invention provides a signal transmission method, which is applied to a communication device, and includes:

step 11: obtaining a first synchronous grid of a preset working frequency band;

step 12: transmitting or receiving a synchronization signal on the first synchronization grid;

the preset working frequency band is a working frequency band of a preset service, and the preset service is a sidelink service, a mass machine type communication (mMTC) service, a narrowband Internet of things (NB-IoT) service or an Integrated Access Backhaul (IAB) service; or, the preset working frequency band is an unauthorized frequency band.

When the preset working frequency band is the working frequency band of sidelink service, the communication device is a terminal, the terminal can be a sending end of a synchronous signal or a receiving end of the synchronous signal, and when the terminal is the sending end of the synchronous signal, the terminal can quickly determine a first synchronous grid for sending the synchronous signal and send the synchronous signal on the determined first synchronous grid, so that the communication efficiency can be improved, and confusion with physical signals/channels of other types of services with the same frequency can be avoided. When the terminal is a receiving end of the synchronous signal, the terminal can quickly determine a first synchronous grid for receiving the synchronous signal and search the synchronous signal on the determined first synchronous grid, so that the searching complexity can be reduced, confusion with physical signals/channels of other types of services with the same frequency can be avoided, the power consumption is saved, and the communication efficiency is improved.

And when the preset service is a sidelink service, the synchronization signal is a sidelink synchronization signal. The sildelink service refers to a service performed on the sildelink, and includes at least one of communication services performed on a Sidelink, such as Device-to-Device (D2D) and Vehicle-to-outside (V2X). V2X mainly includes at least one of Vehicle-to-Vehicle communication (V2V), Vehicle-to-Infrastructure communication (V2I), Vehicle-to-Network communication (V2N), and Vehicle-to-human communication (V2P).

When the preset working frequency band is an unauthorized frequency band, or the preset service is an mtc service, an NB-IoT service, or an IAB service, the communication device may be a network side device, or may also be a terminal, the network side device is a sending end of a synchronization signal, the terminal is a receiving end of the synchronization signal, and the network side device may quickly determine a first synchronization grid for sending the synchronization signal, and send the synchronization signal on the determined first synchronization grid, so that the communication efficiency may be improved, and confusion with physical signals/channels of other types of services with the same frequency may be avoided. The terminal can quickly determine the first synchronization grid for receiving the synchronization signals and search the synchronization signals on the determined first synchronization grid, so that the searching complexity can be reduced, confusion with physical signals/channels of other types of services with the same frequency can be avoided, power consumption is saved, and communication efficiency is improved.

When the preset working frequency band is an unlicensed frequency band, the synchronization signal may be sent in an SSB form.

A method of how to obtain the first synchronization grid is explained in detail below.

In the embodiment of the present invention, the first synchronization grid may be obtained by at least one of the following methods:

the first method is as follows: if the preset working frequency band is overlapped with the range of 0-3000MHz, the frequency domain position of the first synchronous grid of the overlapped part of the preset working frequency band is as follows: offset1+ stepsize 1N 1X + M1X 50kHz, the first GSCN of the first synchronization grid of the preset operating band in the overlapping portion being: 3N1+ (M1-3)/2, where Offset1 is the frequency domain Offset value of the first synchronization grid, stepsize1 is the step size of the first GSCN of the adjacent first synchronization grid, X is the frequency domain unit difference of the adjacent first synchronization grid, and Offset1, N1, and M1 are integers;

it can be seen that, in the first mode, Offset1 and stepsize1 are added compared to the calculation formula (see table 2) of the frequency domain position of the operating band of the NR network in the range of 0-3000MHz, and the frequency domain unit difference of the adjacent synchronization grids is replaced by X, which is not limited to 1200 KHz.

In the embodiment of the invention, the values of Offset1 and stepsize1 can be set as required, stepsize1 can be an integer or a decimal, and the value ranges of N1 and M1 are determined according to the values of Offset1, stepsize1 and X.

The second method comprises the following steps: if the preset working frequency band overlaps with the range of 3000-24250MHz, the frequency domain position of the first synchronization grid of the overlapped part of the preset working frequency band is: offset2+ R1+ stepsize2 × N2 × Y, the first GSCN of the first synchronization grid of the preset operating band in the overlapping portion being: GSCN _ Offset1+ N2, where Offset2 is the frequency domain Offset value of the first synchronization grid, R1 is the frequency domain position of the first synchronization grid with the lowest frequency domain in the range of 3000-24250MHz, stepsize2 is the step size of the first GSCN of the adjacent first synchronization grid, Y is the frequency domain unit difference of the adjacent first synchronization grid, GSCN _ Offset1 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 0-3000MHz, and GSCN _ Offset1, Offset2 and N2 are integers;

r1 may be, for example, 3000 MHz.

GSCN _ offset1 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 0-3000MHz, meaning that GSCN _ offset1 is equal to the maximum value of the first GSCN of the first synchronization grid in the range of 0-3000MHz, or equal to the maximum value of the first GSCN of the first synchronization grid in the range of 0-3000MHz + 1.

It can be seen that, in the second mode, compared with the calculation formula (please refer to table 2) of the frequency domain position of the operating band within the range of 3000-24250MHz of the NR network, Offset2 and stepsize2 are added, and the frequency domain unit difference value of the adjacent synchronization grids is replaced by Y, which is not limited to 1.44 MHz.

In the embodiment of the invention, the values of Offset2 and stepsize2 can be set as required, stepsize2 can be an integer or a decimal, and the value range of N2 is determined according to the values of Offset2, stepsize2 and Y.

The third method comprises the following steps: if the preset working frequency band overlaps with the range of 24250-100000MHz, the frequency domain position of the first synchronization grid of the overlapped part of the preset working frequency band is as follows: offset3+ R2+ stepsize3 × N3 × Z, the first GSCN of the first synchronization grid of the preset operating band in the overlapping portion being: GSCN _ Offset2+ N2, where Offset3 is the frequency domain Offset value of the first synchronization grid, R2 is the frequency domain position of the first synchronization grid with the lowest frequency domain in the range of 24250 + 100000MHz, stepsize3 is the step size of the first GSCN of the adjacent first synchronization grid, Z is the frequency domain unit difference of the adjacent first synchronization grid, GSCN _ Offset2 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 3000 + 24250MHz, and GSCN _ Offset2, Offset3 and N3 are integers;

r2 is, for example, 24250.08 MHz.

The GSCN _ offset2 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 3000-24250MHz, which means that GSCN _ offset2 is equal to the maximum value of the first GSCN of the first synchronization grid in the range of 3000-24250MHz, or equal to the maximum value of the first GSCN of the first synchronization grid in the range of 3000-24250MHz + 1.

It can be seen that, in the third mode, compared with the calculation formula (please refer to table 2) of the frequency domain position of the operating frequency band in the range of 24250-100000MHz of the NR network, Offset3 and stepsize3 are added, and the frequency domain unit difference value of the adjacent synchronization grids is replaced by Z, which is not limited to 17.28 MHz.

In the embodiment of the invention, the values of Offset3 and stepsize3 can be set as required, stepsize3 can be an integer or a decimal, and the value range of N3 is determined according to the values of Offset3, stepsize3 and Z.

R1 can be calculated based on X, or X and Y;

the above R2 can be calculated based on X and Y, or X, Y and Z.

The method is as follows: the first synchronization grid is N times of a channel grid of the preset working frequency band, wherein N is a positive integer greater than or equal to 1;

the fifth mode is as follows: determining a frequency domain range to which the preset working frequency band belongs, wherein the available working frequency band of the preset working frequency band is divided into at least two frequency band ranges; and obtaining the frequency domain position of the first synchronization grid according to the frequency domain range to which the preset working frequency band belongs.

In some embodiments of the present invention, the preset operating frequency band is an operating frequency band of the preset service, and if the preset operating frequency band is a non-dedicated operating frequency band, the frequency domain position of the first synchronization grid may be obtained by using at least one of the first manner, the second manner, the third manner, or the fifth manner. The non-dedicated operating band is an operating band that is not dedicated for the preset service.

In some embodiments of the present invention, if the working frequency band of the preset service is a non-dedicated working frequency band and overlaps with the working frequency band of the preset service and the working frequency band of the NR network, at least one of the first manner, the second manner, and the third manner may be adopted to obtain the frequency domain position of the first synchronization grid.

In some embodiments of the present invention, if the operating band of the predetermined service includes at least two sub-bands, the at least two sub-bands overlap with at least two operating bands of the NR network, respectively, and at least one of a frequency domain unit difference of adjacent synchronization grids of the at least two operating bands of the NR network, a step size of a GSCN of the adjacent synchronization grids, and a channel bandwidth is different, at least one of a frequency domain Offset value of the first synchronization grid of the at least two sub-bands (i.e., Offset1, Offset2, or Offset3) and a step size of the first GSCN of the adjacent first synchronization grid (i.e., stepsize1, stepsize2, or stepsize3) is different.

For example, the operating bands of the predetermined service include two bands bandX and bandY, the operating bands bandM of the bandX and NR networks overlap, the operating bands bandN of the bandY and NR networks overlap, and at least one of a difference in frequency domain units of adjacent synchronization grids of bandM and bandN, a step size of GSCN of the adjacent synchronization grid, and a channel bandwidth is different, assuming that a frequency domain Offset value of a synchronization grid of bandX is Offset _ i, a frequency domain Offset value of a synchronization grid of bandY is Offset _ j, a step size of GSCN of an adjacent synchronization grid of bandX is stepsize _ i, a step size of GSCN of an adjacent synchronization grid of bandY is stepsize _ j, offset i may be the same as or different from Offset j, and stepsize i may be the same as or different from stepsize j, when Offset _ i is the same as Offset _ j, stepsize _ i is different from stepsize _ j, when Offset _ i is different from Offset _ j, stepsize _ i is the same as stepsize _ j.

In some embodiments of the present invention, if the operating bands of the predetermined service include at least two sub-bands, the at least two sub-bands overlap with at least two operating bands of the NR network, respectively, and design parameters of synchronization grids of the at least two operating bands of the NR network are the same, frequency domain Offset values (i.e., Offset1, Offset2, or Offset3) of the first synchronization grid of the at least two sub-bands and step sizes (i.e., stepsize1, stepsize2, or stepsize3) of the first GSCN of the adjacent first synchronization grid may be the same. The design parameters include frequency domain unit difference values of adjacent synchronization grids, step sizes of GSCNs of the adjacent synchronization grids, and channel bandwidths.

In some embodiments of the present invention, if there is an overlap between the preset service operating frequency band and N4 operating frequency bands of the NR network, the step size of the first GSCN of the adjacent first synchronization grid of the preset service operating frequency band (i.e. stepsize1, stepsize2, or stepsize3) is equal to the maximum value, the minimum value, or the average value of the step sizes of the GSCNs of the adjacent synchronization grids of the N4 operating frequency bands, where N4 is a positive integer greater than or equal to 2. Optionally, the average is an integer.

In some embodiments of the present invention, the N4 is an odd number greater than or equal to 3, and the step size of the first GSCN of the adjacent first synchronization grid of the working bands of the preset service is equal to a maximum value, a minimum value, a mean value or a median value among the step sizes of the GSCNs of the adjacent synchronization grids of the N4 working bands.

In some embodiments of the present invention, the preset operating frequency band is an operating frequency band of the preset service, and if the preset operating frequency band is a dedicated operating frequency band, the frequency domain position of the first synchronization grid is obtained by using at least one of the fourth mode and the fifth mode. The dedicated operating band is a dedicated operating band configured for the preset service. Optionally, the preset operating frequency band belongs to an operating frequency band47 of LTE V2X service.

In some embodiments of the present invention, if the preset operating frequency band is a dedicated operating frequency band and there is no overlap between the preset operating frequency band and the operating frequency band of the NR network, the frequency domain position of the first synchronization grid is obtained in the fourth manner. Optionally, the preset operating frequency band belongs to an operating frequency band47 of LTE V2X service.

In some embodiments of the present invention, the preset operating frequency band is an unlicensed frequency band, and the frequency domain position of the first synchronization grid is obtained by using at least one of the first manner, the second manner, the third manner, the fourth manner, and the fifth manner.

In the embodiment of the present invention, if the preset operating frequency band is an unlicensed frequency band and at least one of the first, second, or third manners is adopted to obtain the frequency domain position of the first synchronization grid, the density of synchronization grids in the unlicensed frequency band may be reduced while the design mechanism of the synchronization grid for NR is successfully multiplexed by adjusting the stepsize (i.e., the stepsize1, the stepsize2, or the stepsize 3).

In some embodiments of the invention, X, Y and Z may be the following values:

x1200 kHz, Y1.44 MHz, Z17.28 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 28.8 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 37.44 MHz; or

X is 6.06MHz, Y is 11.16MHz, and Z is 17.28 MHz; or

X＝6.06MHz，Y＝11.16MHz,Z＝18.72MHz。

In some embodiments of the invention, when the first synchronization grid is obtained in the fourth way:

the first synchronization grid is equal to a channel grid of the preset working frequency band (i.e. N is 1); or

If the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 of the synchronization signal of the preset operating frequency band are the same, the first synchronization grid is the same as the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 (i.e., the first synchronization alone SCS1 SCS2), wherein the second subcarrier spacing SCS2 is a subcarrier spacing of other signals associated with the synchronization signal, and the other signals are at least one of a data signal, a control signal, a service announcement signal, a service discovery signal, and a broadcast signal of the preset service; or

If the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 of the synchronization signal of the preset operating frequency band are different, and the total number of the values of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 is N5, the first synchronization grid is equal to the maximum value (i.e., first sync rat max (SCS1, SCS2)) or the minimum value (i.e., first sync rat min (SCS1, SCS2)) of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2, where N5 is a positive integer greater than or equal to 2; or

In some embodiments of the invention, the first synchronization grid is equal to xkHz β, β being a positive integer, optionally x being 100, optionally β being 1.

In some embodiments of the present invention, the N5 is an odd number greater than or equal to 3, and the first synchronization grid is equal to a maximum value, a minimum value, or a median value of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS 2.

In some other embodiments of the present invention, the first synchronization grid (first sync slicer) is equal to a channel grid (channel slicer) of the preset operating frequency band (i.e., N is 1), and if a first subcarrier spacing SCS1 of a synchronization signal of the preset operating frequency band is identical to a second subcarrier spacing SCS2, the first synchronization grid is identical to the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 (i.e., first sync slicer SCS1 is SCS2), wherein the second subcarrier spacing SCS2 is a subcarrier spacing of other signals associated with the synchronization signal, and the other signals are at least one of a data signal, a control signal, a service discovery signal, and a broadcast signal of the preset service.

In some other embodiments of the present invention, the first synchronization grid (first sync raster) is equal to a channel grid (channel raster) of the preset operating frequency band (i.e., N ═ 1), and if the first subcarrier spacing SCS1 of the synchronization signal of the preset operating frequency band is different from the second subcarrier spacing SCS2, and the total number of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2 is N5, the first synchronization grid is equal to the maximum value (i.e., first sync raster channel raster max (SCS1, SCS2)) or the minimum value (i.e., first sync raster channel raster min (SCS1, SCS2)) of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS2, N5 is a positive integer greater than or equal to 2. Further, N5 is an odd number greater than or equal to 3, and the first synchronization grid is equal to the maximum value (i.e., first sync _ ras _ max (SCS1, SCS2)), the minimum value (i.e., first sync _ ras _ min (SCS1, SCS2)), or the median value of the first subcarrier spacing SCS1 and the second subcarrier spacing SCS 2.

In some other embodiments of the present invention, the first synchronization grid is equal to a channel grid of the preset operating frequency band, and the first synchronization grid is equal to xkHz β, β is a positive integer, optionally, x is 100, and optionally, β is 1.

In some embodiments of the present invention, in a fifth mode, when obtaining the frequency domain position of the first synchronization grid,

if the preset working frequency band is located in the first frequency domain range, the frequency domain unit difference value of the adjacent synchronous grids of the preset working frequency band is a 1;

if the preset working frequency band is located in a second frequency domain range, the frequency domain unit difference value of the adjacent synchronous grids of the preset working frequency band is a 2;

if the preset working frequency band is located in the third frequency domain range, the frequency domain unit difference value of the adjacent synchronous grids of the preset working frequency band is a 3.

In some embodiments of the invention, the first frequency domain range is: 0-3GHz, the second frequency domain range is: 3-6GHz, and the third frequency domain range is: above 24.25 GHz.

In some embodiments of the invention, the a1 is 7.5MHz, the a2 is 14.04MHz, the a3 is 37.44 MHz; alternatively, the a1 is 6.06MHz, the a2 is 11.16MHz, and the a3 is 18.72 MHz.

The values of the frequency domain ranges (the first frequency domain range, the second frequency domain range, and the third frequency domain range) and the values of the frequency domain unit differences (a1, a2, a 3) may be combined or may be independent, for example, when the a1 is 7.5MHz, the a2 is 14.04MHz, and the a3 is 37.44MHz, the values of the first frequency domain range, the second frequency domain range, and the third frequency domain range are not limited to: 0-3GHz, 3-6GHz and above 24.25 GHz.

In some embodiments of the present invention, the signal transmission method may further include: transmitting or receiving at least one of a broadcast channel, a service discovery channel, a data channel, and a control channel on the first synchronization grid of the preset operating frequency band.

The following describes the manner of determining stepsize1, stepsize2, and stepsize 3.

One way of determining is:

stepsize (i.e., Stepsize1, Stepsize2, Stepsize3) is the result of (the smallest band of channels supported by the preset operating band at a given SCS-bandwidth of the first signal/channel/resource + first gap)/second gap.

Optionally, the calculation is rounded down.

Wherein the first signal/channel/resource may be at least one of: a sidelink synchronization signal, a sidelink broadcast signal (channel), a sidelink discovery signal (channel), a sidelink service announcement signal (channel), a sidelink data signal (channel), a sidelink control signal (channel), a sidelink resource pool, and a sidelink subchannel.

The first gap is a channel raster (channel raster), i.e. the frequency domain difference between two adjacent channel rasters;

if the working frequency band of the first service belongs to 0-3000MHz, the second gap is X; if the working frequency band of the first service belongs to 3000-24250MHz, the second gap is Y; the working frequency band of the first service belongs to 24250-.

Another determination method is as follows:

stepsize (i.e., Stepsize1, Stepsize2, Stepsize3) is the Stepsize that overlaps the partial NR band;

and if the operating frequency bands of the plurality of NR are overlapped, the overlapping part is equal to max (the overlapping part is the overlapping part of the operating frequency bands of the NR).

The signal transmission method according to the present invention will be described with reference to specific embodiments.

Example 1

The preset service operating frequency band is a non-dedicated operating frequency band, and overlaps with the preset service operating frequency band and an NR network operating frequency band, where X is 1200kHz, Y is 1.44MHz, Z is 17.28MHz, R1 is 3000MHz, and R2 is 24250.08 MHz. For the frequency domain position of the first synchronization grid of the working frequency band of the preset service in the overlapped part, the first SS_REFAnd the way the first GSCN for the first synchronization grid is calculated is shown in table 7:

table 7: parameters of a first GSCN of a first synchronization grid

Example 2

The preset service operating frequency band is a non-dedicated operating frequency band, and overlaps with the preset service operating frequency band and an NR network operating frequency band, where X is 1200kHz, Y is 1.44MHz, Z is 17.28MHz, R1 is 3000MHz, and R2 is 24250.08 MHz. The frequency domain position of the first synchronization grid of the operating band of the preset service for the overlapped part, i.e., the first SSREF, and the first GSCN are calculated as shown in table 8, wherein offset1/offset2/offset3 are respectively half of the difference of the frequency domain units of the synchronization grid corresponding to NR in the frequency domain range, offset1 is 600kHz, offset2 is 720kHz, and offset3 is 8.64 MHz. Let stepsize1 be stepsize2 be stepsize3 be 1.

Table 8: parameters of a first GSCN of a first synchronization grid

Wherein GSCN _ offset1 is dependent on the maximum value of the first GSCN in the range of 0-3000MHz, and GSCN _ offset2 is dependent on the maximum value of the first GSCN in the range of 3000-24250 MHz.

Example 3

The preset service operating frequency band belongs to 0-3000MHz and overlaps with the operating frequency bands n38, n41 of the NR network, for example, the preset service operating frequency band belongs to the range of 2570MHz-2620MHz, the channel grid is 15kHz, and X is 1200 kHz.

At this time, Stepsize1 is max (Stepsize of the operating band of the overlapping NR) is max (band n38 GSCN Stepsize, band n41GSCN Stepsize) is 3, and offset1 is 600 kHz.

If M1 is 3, then the first SSREF calculation method is 600kHz + N1 × 1200kHz +150kHz, and the first GSCN is 3N 1.

Example 4

Let X be 1200kHz, Y be 1.44MHz, and Z be 17.28 MHz.

The preset working frequency band is in the range of 0-3000MHz, and the channel grid is 15 kHz. At this time stepsize1 ═ floor ((minimum channel bandwidth supported by the preset operating band at a given SCS-bandwidth of the first signal or channel or resource +15kHz)/1200 kHz).

The preset working frequency band is in the range of 0-3000MHz, and the channel grid is 100 kHz. At this time stepsize1 is floor ((minimum channel bandwidth supported by the preset operating band at a given SCS-bandwidth of the first signal or channel or resource +100kHz)/1200 kHz).

The preset working frequency band is in the range of 0-3000MHz, and the channel grid is 30 kHz. At this time stepsize1 ═ floor ((minimum channel bandwidth supported by the preset operating band at a given SCS-bandwidth of the first signal or channel or resource +30kHz)/1200 kHz);

the preset operating band falls within the range of 3000-6000 MHz, and the channel grid is 15kHz, at this time, stepsize1 is floor (the minimum channel bandwidth supported by the preset operating band under the given SCS-the bandwidth of the first signal or channel or resource +15kHz)/1.44 MHz);

the preset operating frequency band falls within the range of 3000-;

the preset operating band falls within the range of 3000-6000 MHz, and the channel grid is 30kHz, at this time, stepsize1 is floor (the minimum channel bandwidth supported by the preset operating band under the given SCS-the bandwidth of the first signal or channel or resource +30kHz)/1.44 MHz);

the preset operating frequency band belongs to the range of 24.25G-100 GHz, and the channel grid is 60kHz, at this time, stepsize1 is floor ((the minimum channel bandwidth supported by the preset operating frequency band under the given SCS-bandwidth of the first signal or channel or resource +60kHz)/17.28 MHz);

the preset operating frequency band belongs to the range of 24.25G-100 GHz, and the channel grid is 100kHz, at this time, stepsize1 is floor ((the minimum channel bandwidth supported by the preset operating frequency band under the given SCS-bandwidth of the first signal or channel or resource +100kHz)/17.28 MHz);

the preset operating band falls within the 24.25G-100 GHz range, and the channel grid is 120kHz, at which time stepsize1 is floor (the minimum channel bandwidth supported by the preset operating band under the given SCS-bandwidth of the first signal or channel or resource +120kHz)/17.28 MHz).

Example 5

The preset working frequency band is a dedicated working frequency band, or when LTE V2X band47 is reused, the channel grid of the preset working frequency band is 100kHz, and the first synchronization grid is 100kHz, so the frequency domain center of the synchronization signal transmitted on the first synchronization grid is an integral multiple of 100 kHz.

Example 6

The preset working frequency band is a special working frequency band, the channel grid of the preset working frequency band is x kHz, and the first synchronization grid is x kHz, so that the center of a frequency domain of a synchronization signal sent on the first synchronization grid is an integral multiple of x kHz.

Example 7

When the preset working frequency range belongs to different frequency domain ranges, the frequency domain position of the first synchronization grid is the first SS_REFAnd the first GSCN may be calculated as shown in tables 9, 10, 11, 12:

table 9: parameters of a first GSCN of a first synchronization grid

Table 9, X ═ 7.5kHz, Y ═ 14.04MHz, Z ═ 28.8MHz, R1 ═ 3000MHz, R2 ═ 24256.56 MHz.

Table 10: parameters of a first GSCN of a first synchronization grid

In table 10, X is 7.5kHz, Y is 14.04MHz, Z is 37.44MHz, R1 is 3000MHz, and R2 is 24256.56 MHz.

Table 11: parameters of a first GSCN of a first synchronization grid

In table 11, X is 6.06kHz, Y is 11.16MHz, Z is 17.28MHz, R1 is 3000MHz, and R2 is 24254.4 MHz.

Table 12: parameters of a first GSCN of a first synchronization grid

In table 12, X is 6.06kHz, Y is 11.16MHz, Z is 18.72MHz, R1 is 3000MHz, and R2 is 24254.4 MHz.

The value of M1 in the above table is 0. R1 is calculated from X, or X and Y; r2 was calculated from X and Y, alternatively, X, Y and Z.

Example 8

The preset operating frequency band is an unlicensed frequency band, after a pre-session check (LBT) of the network device is successful, a synchronization signal may be sent on a first synchronization grid of the unlicensed frequency band, where X is 1200MHz, Y is 1.44MHz, Z is 17.28MHz, R1 is 3000MHz, R2 is 24250.08MHz, and the first synchronization grid is shown in table 10:

table 13: parameters of a first GSCN of a first synchronization grid

Alternatively, offset1 is offset2 is offset3 is 0. Thereby further having:

table 14: parameters of a first GSCN of a first synchronization grid

Alternatively, stepsize1>1stepsize2>1stepsize3>1

Optionally, stepsize1 ═ 12 and or stepsize2 ═ 10.

Optionally, M1 ═ 3.

The signal transmission method of the embodiment of the invention can be applied to an NR network and can also be applied to other subsequent evolution communication systems.

Referring to fig. 2, an embodiment of the present invention further provides a communication device, including:

an obtaining module 21, configured to obtain a first synchronization grid of a preset working frequency band;

a first transmission module 22 for transmitting or receiving a synchronization signal on the first synchronization grid;

The communication equipment is a terminal or network side equipment.

When the preset working frequency band is a sidelink working frequency band, the communication device is a terminal, the terminal can be a sending end of a synchronous signal or a receiving end of the synchronous signal, and when the terminal is the sending end of the synchronous signal, the terminal can quickly determine a first synchronous grid for sending the synchronous signal and send the synchronous signal on the determined first synchronous grid, so that the communication efficiency can be improved, and confusion with physical signals/channels of other types of services with the same frequency can be avoided. When the terminal is a receiving end of the synchronous signal, the terminal can quickly determine a first synchronous grid for receiving the synchronous signal and search the synchronous signal on the determined first synchronous grid, so that the searching complexity can be reduced, confusion with physical signals/channels of other types of services with the same frequency can be avoided, the power consumption is saved, and the communication efficiency is improved.

And when the preset service is a sidelink service, the synchronization signal is a sidelink synchronization signal.

In the embodiment of the present invention, the obtaining module may obtain the first synchronization grid by using at least one of the following manners:

r1 can be calculated based on X, or X and Y;

the above R2 can be calculated based on X and Y, or X, Y and Z.

In some embodiments of the present invention, the preset operating frequency band is an operating frequency band of the preset service, and if the preset operating frequency band is a non-dedicated operating frequency band, at least one of a first mode, a second mode, a third mode, or a fifth mode is adopted to obtain a frequency domain position of the first synchronization grid.

In some embodiments of the present invention, if the preset operating frequency band is a non-dedicated operating frequency band and overlaps with the preset operating frequency band and an operating frequency band of a new wireless NR network, at least one of the first method, the second method, and the third method is adopted to obtain a frequency domain position of the first synchronization grid.

In some embodiments of the present invention, the preset operating frequency band is an operating frequency band of the preset service, and if the preset operating frequency band is a dedicated operating frequency band, the frequency domain position of the first synchronization grid is obtained by using at least one of the fourth mode and the fifth mode.

In some embodiments of the present invention, if the preset operating frequency band is a dedicated operating frequency band and there is no overlap between the preset operating frequency band and the operating frequency band of the NR network, the frequency domain position of the first synchronization grid is obtained in the fourth manner.

In some embodiments of the present invention, the preset operating band belongs to an operating band47 of LTE V2X service.

In some embodiments of the present invention, if the working bands of the preset service include at least two sub-bands, the at least two sub-bands overlap with at least two working bands of the NR network, and at least one of a frequency domain unit difference of adjacent synchronization grids of the at least two working bands of the NR network, a step size of a GSCN of an adjacent synchronization grid, and a channel bandwidth is different, at least one of a frequency domain offset value of the first synchronization grid of the at least two sub-bands is different from that of the first GSCN of the adjacent first synchronization grid.

In some embodiments of the present invention, if there is an overlap between the preset service operating frequency band and N4 operating frequency bands of the NR network, the step size of the first GSCN of the first synchronization grid adjacent to the preset service operating frequency band is equal to a maximum value, a minimum value, or an average value among the step sizes of the GSCNs of the synchronization grids adjacent to the N4 operating frequency bands, where N4 is a positive integer greater than or equal to 2;

the N4 is an odd number greater than or equal to 3, and the step length of the first GSCN of the first synchronization grid adjacent to the preset service working frequency band is equal to the maximum value, the minimum value, the mean value or the median value among the step lengths of the GSCNs of the adjacent synchronization grids of the N4 working frequency bands.

In some embodiments of the invention, X is 1200kHz, Y is 1.44MHz, and Z is 17.28 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 28.8 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 37.44 MHz; or

X is 6.06MHz, Y is 11.16MHz, and Z is 17.28 MHz; or

X＝6.06MHz，Y＝11.16MHz,Z＝18.72MHz。

In some embodiments of the invention, when the frequency domain position of the first synchronization grid is obtained in the fourth way,

If a first subcarrier interval of the synchronization signal of the preset working frequency band is the same as a second subcarrier interval, the first synchronization grid is the same as the first subcarrier interval and the second subcarrier interval, wherein the second subcarrier interval is a subcarrier interval of other signals associated with the synchronization signal, and the other signals are at least one of a data signal, a control signal, a service announcement signal, a service discovery signal and a broadcast signal of the preset service; or

If the first subcarrier spacing and the second subcarrier spacing of the synchronization signal of the preset operating frequency band are different, and the total number of the numerical values of the first subcarrier spacing and the second subcarrier spacing is N5, the first synchronization grid is equal to the maximum value or the minimum value of the first subcarrier spacing and the second subcarrier spacing, wherein N5 is a positive integer greater than or equal to 2; or

The first synchronization grid is equal to xkHz beta, beta being a positive integer. Optionally, x is 100, optionally β is 1.

Further, N5 is an odd number greater than or equal to 3, and the first synchronization grid is equal to a maximum, a minimum, or a median of the first subcarrier spacing and the second subcarrier spacing.

In some embodiments of the invention, in a fifth mode, when obtaining the frequency domain position of the first synchronization grid,

In some embodiments of the invention, the a1 is 7.5MHz, the a2 is 14.04MHz, the a3 is 37.44 MHz; or

The a1 is 6.06MHz, the a2 is 11.16MHz, and the a3 is 18.72 MHz.

In some embodiments of the present invention, the communication device may further include:

a second transmission module, configured to transmit or receive at least one of a broadcast channel, a service discovery channel, a data channel, and a control channel on the first synchronization grid of the preset operating frequency band.

When the communication device in the embodiment of the present invention is a terminal, please refer to fig. 3, where fig. 3 is a schematic structural diagram of the terminal in the embodiment of the present invention, and the terminal 30 includes but is not limited to: radio frequency unit 31, network module 32, audio output unit 33, input unit 34, sensor 35, display unit 36, user input unit 37, interface unit 38, memory 39, processor 310, and power supply 311. Those skilled in the art will appreciate that the terminal structure shown in fig. 3 is not intended to be limiting and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The processor 310 is configured to obtain a first synchronization grid of a preset operating frequency band;

a radio frequency unit 31 for transmitting or receiving a synchronization signal on the first synchronization grid;

According to the embodiment of the invention, the position of the frequency domain for sending or receiving the synchronous signal can be quickly determined, and the communication efficiency is improved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 31 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 310; in addition, the uplink data is transmitted to the base station. Typically, the radio frequency unit 31 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 31 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 32, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 33 may convert audio data received by the radio frequency unit 31 or the network module 32 or stored in the memory 39 into an audio signal and output as sound. Also, the audio output unit 33 may also provide audio output related to a specific function performed by the terminal 30 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 33 includes a speaker, a buzzer, a receiver, and the like.

The input unit 34 is for receiving an audio or video signal. The input Unit 34 may include a Graphics Processing Unit (GPU) 341 and a microphone 342, and the Graphics processor 341 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 36. The image frames processed by the graphic processor 341 may be stored in the memory 39 (or other storage medium) or transmitted via the radio frequency unit 31 or the network module 32. The microphone 342 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 31 in case of the phone call mode.

The terminal 30 also includes at least one sensor 35, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 361 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 361 and/or the backlight when the terminal 30 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 35 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described in detail herein.

The display unit 36 is used to display information input by the user or information provided to the user. The Display unit 36 may include a Display panel 361, and the Display panel 361 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 37 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 37 includes a touch panel 371 and other input devices 372. Touch panel 371, also referred to as a touch screen, may collect touch operations by a user on or near touch panel 371 (e.g., operations by a user on or near touch panel 371 using a finger, a stylus, or any suitable object or attachment). The touch panel 371 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 310, and receives and executes commands sent by the processor 310. In addition, the touch panel 371 may be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 37 may include other input devices 372 in addition to the touch panel 371. In particular, the other input devices 372 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 371 may be overlaid on the display panel 361, and when the touch panel 371 detects a touch operation thereon or nearby, the touch panel 371 is transmitted to the processor 310 to determine the type of the touch event, and then the processor 310 provides a corresponding visual output on the display panel 361 according to the type of the touch event. Although the touch panel 371 and the display panel 361 are shown in fig. 3 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 371 and the display panel 361 may be integrated to implement the input and output functions of the terminal, and is not limited herein.

The interface unit 38 is an interface for connecting an external device to the terminal 30. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 38 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 30 or may be used to transmit data between the terminal 30 and an external device.

The memory 39 may be used to store software programs as well as various data. The memory 39 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 39 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 310 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 39 and calling data stored in the memory 39, thereby performing overall monitoring of the terminal. Processor 310 may include one or more processing units; preferably, the processor 310 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 310.

The terminal 30 may further include a power supply 311 (such as a battery) for supplying power to various components, and preferably, the power supply 311 may be logically connected to the processor 310 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal 30 includes some functional modules that are not shown, and are not described in detail herein.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a communication device according to another embodiment of the present invention, where the communication device 40 includes: a processor 41 and a memory 42. In the embodiment of the present invention, the communication device 40 further includes: a computer program stored on the memory 42 and executable on the processor 41, the computer program when executed by the processor 41 performing the steps of:

obtaining a first synchronous grid of a preset working frequency band;

The processor 41 is responsible for managing the bus architecture and general processing, and the memory 42 may store data used by the processor 111 in performing operations.

Optionally, the computer program when executed by the processor 41 may further implement the steps of:

obtaining the first synchronization grid in at least one of:

Optionally, the computer program when executed by the processor 41 may further implement the steps of: and if the preset working frequency band is a non-dedicated working frequency band, acquiring the frequency domain position of the first synchronization grid by adopting at least one of a mode one, a mode two, a mode three or a mode five.

Optionally, the computer program when executed by the processor 41 may further implement the steps of: and if the preset working frequency band is a non-dedicated working frequency band and is overlapped with the preset working frequency band and the working frequency band of the new wireless NR network, acquiring the frequency domain position of the first synchronization grid by adopting at least one of the first mode, the second mode and the third mode.

Optionally, the computer program when executed by the processor 41 may further implement the steps of: and if the preset working frequency band is a special working frequency band, acquiring the frequency domain position of the first synchronization grid by adopting at least one of the fourth mode and the fifth mode.

Optionally, the computer program when executed by the processor 41 may further implement the steps of: and if the preset working frequency band is a special working frequency band and the preset working frequency band does not overlap with the working frequency band of the NR network, acquiring the frequency domain position of the first synchronization grid by adopting the fourth mode.

Optionally, the preset operating frequency band belongs to an operating frequency band47 of LTE V2X service.

Optionally, the computer program when executed by the processor 41 may further implement the steps of: and the preset working frequency band is an unauthorized frequency band, and the frequency domain position of the first synchronization grid is obtained by adopting at least one of the first mode, the second mode, the third mode, the fourth mode and the fifth mode.

Optionally, if the working frequency band of the preset service includes at least two sub-frequency bands, the at least two sub-frequency bands overlap with the at least two working frequency bands of the NR network, at least one of a frequency domain unit difference value of adjacent synchronization grids of the at least two working frequency bands of the NR network, a step size of a GSCN of the adjacent synchronization grids, and a channel bandwidth is different, and at least one of a frequency domain offset value of the first synchronization grid of the at least two sub-frequency bands is different from a step size of the first GSCN of the adjacent first synchronization grid.

Optionally, if the working frequency band of the preset service overlaps with N4 working frequency bands of the NR network, the step size of the first GSCN of the first synchronization grid adjacent to the working frequency band of the preset service is equal to the maximum value, the minimum value, or the average value of the step sizes of the GSCNs of the adjacent synchronization grids of the N4 working frequency bands, where N4 is a positive integer greater than or equal to 2;

optionally, N4 is an odd number greater than or equal to 3, and the step size of the first GSCN of the first synchronization grid adjacent to the preset service operating frequency band is equal to the maximum value, the minimum value, the average value, or the median value among the step sizes of the GSCNs of the adjacent synchronization grids of the N4 operating frequency bands.

Alternatively, X is 1200kHz, Y is 1.44MHz, and Z is 17.28 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 28.8 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 37.44 MHz; or

X is 6.06MHz, Y is 11.16MHz, and Z is 17.28 MHz; or

X＝6.06MHz，Y＝11.16MHz,Z＝18.72MHz。

Optionally, when the frequency domain position of the first synchronization grid is obtained in the fourth way,

The first synchronization grid is equal to xkHz beta, beta being a positive integer.

Alternatively, x is 100 and β is 1.

Optionally, N5 is an odd number greater than or equal to 3, and the first synchronization grid is equal to a maximum, a minimum, or a median of the first and second subcarrier spacings.

Optionally, in a fifth mode, when obtaining the frequency domain position of the first synchronization grid,

Optionally, the first frequency domain range is: 0-3GHz, the second frequency domain range is: 3-6GHz, and the third frequency domain range is: above 24.25 GHz.

Alternatively, the a1 is 7.5MHz, the a2 is 14.04MHz, and the a3 is 37.44 MHz; or

The a1 is 6.06MHz, the a2 is 11.16MHz, and the a3 is 18.72 MHz.

Optionally, the computer program when executed by the processor 41 may further implement the steps of: transmitting or receiving at least one of a broadcast channel, a service discovery channel, a data channel, and a control channel on the first synchronization grid of the preset operating frequency band.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the signal transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A signal transmission method applied to a communication device is characterized by comprising the following steps:

obtaining a first synchronous grid of a preset working frequency band;

the preset working frequency band is a working frequency band of a preset service, and the preset service is a sidelink service, a mass machine type communication mMTC service, a narrowband Internet of things NB-IoT service or an integrated access backhaul IAB service; or, the preset working frequency band is an unauthorized frequency band;

wherein the first synchronization grid is obtained in at least one of the following ways:

the first method is as follows: if the preset working frequency band is overlapped with the range of 0-3000MHz, the frequency domain position of the first synchronous grid of the overlapped part of the preset working frequency band is as follows: offset1+ stepsize 1N 1X + M1 kHz, the first global synchronization grid number GSCN of the first synchronization grid of the overlapping portion of the preset operating band being: 3N1+ (M1-3)/2, where Offset1 is the frequency domain Offset value of the first synchronization grid, stepsize1 is the step size of the first GSCN of the adjacent first synchronization grid, X is the frequency domain unit difference of the adjacent first synchronization grid, and Offset1, N1, and M1 are integers;

the second method comprises the following steps: if the preset working frequency band overlaps with the range of 3000-24250MHz, the frequency domain position of the first synchronization grid of the overlapped part of the preset working frequency band is: offset2+ R1+ stepsize2 × N2 × Y, the first GSCN of the first synchronization grid of the preset operating band in the overlapping portion being: GSCN _ Offset1+ N2, where Offset2 is the frequency domain Offset value of the first synchronization grid, R1 is the frequency domain position of the first synchronization grid with the lowest frequency domain in the range of 3000-24250MHz, stepsize2 is the step size of the first GSCN of the adjacent first synchronization grid, Y is the frequency domain unit difference of the adjacent first synchronization grid, GSCN _ Offset1 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 0-3000MHz, GSCN _ Offset1, Offset2 and N2 are integers;

the third method comprises the following steps: if the preset working frequency band overlaps with the range of 24250-100000MHz, the frequency domain position of the first synchronization grid of the overlapped part of the preset working frequency band is as follows: offset3+ R2+ stepsize3 × N3 × Z, the first GSCN of the first synchronization grid of the preset operating band in the overlapping portion being: GSCN _ Offset2+ N2, where Offset3 is the frequency domain Offset value of the first synchronization grid, R2 is the frequency domain position of the first synchronization grid with the lowest frequency domain in the range of 24250 + 100000MHz, stepsize3 is the step size of the first GSCN of the adjacent first synchronization grid, Z is the frequency domain unit difference of the adjacent first synchronization grid, GSCN _ Offset2 is determined by the maximum value of the first GSCN of the first synchronization grid in the range of 3000 + 24250MHz, and GSCN _ Offset2, Offset3 and N3 are integers.

2. The signal transmission method according to claim 1, wherein the first synchronization grid is obtained by at least one of the way one, the way two, and the way three, and at least one of the following ways:

3. The signal transmission method according to claim 2,

and if the preset working frequency band is a non-dedicated working frequency band, acquiring the frequency domain position of the first synchronization grid by adopting at least one of the first mode, the second mode, the third mode and the fifth mode.

4. The signal transmission method according to claim 3,

and if the preset working frequency band is a non-dedicated working frequency band and is overlapped with the preset working frequency band and the working frequency band of the new wireless NR network, acquiring the frequency domain position of the first synchronization grid by adopting at least one of the first mode, the second mode and the third mode.

5. The signal transmission method according to claim 2,

and if the preset working frequency band is a special working frequency band, acquiring the frequency domain position of the first synchronization grid by adopting at least one of the fourth mode and the fifth mode.

6. The signal transmission method according to claim 5,

and if the preset working frequency band is a special working frequency band and the preset working frequency band does not overlap with the working frequency band of the NR network, acquiring the frequency domain position of the first synchronization grid by adopting the fourth mode.

7. The signal transmission method according to claim 5 or 6, wherein the preset operating band belongs to an operating band47 of LTE V2X service from LTE-A vehicle to outside.

8. The signal transmission method according to claim 2,

and the preset working frequency band is an unauthorized frequency band, and the frequency domain position of the first synchronization grid is obtained by adopting at least one of the first mode, the second mode, the third mode, the fourth mode and the fifth mode.

9. The signal transmission method according to claim 4,

if the working frequency band of the preset service includes at least two sub-frequency bands, the at least two sub-frequency bands overlap with the at least two working frequency bands of the NR network, at least one of a frequency domain unit difference value of adjacent synchronous grids of the at least two working frequency bands of the NR network, a step size of a GSCN of the adjacent synchronous grids, and a channel bandwidth is different, and at least one of a frequency domain offset value of the first synchronous grid of the at least two sub-frequency bands is different from at least one of a step size of the first GSCN of the adjacent first synchronous grid.

10. The signal transmission method according to claim 4,

if the working frequency band of the preset service overlaps with N4 working frequency bands of the NR network, the step length of the first GSCN of the first synchronization grid adjacent to the working frequency band of the preset service is equal to the maximum value, the minimum value, or the average value of the step lengths of the GSCNs of the synchronization grids adjacent to the N4 working frequency bands, where N4 is a positive integer greater than or equal to 2.

11. The signal transmission method according to claim 10,

12. The signal transmission method according to claim 1,

x1200 kHz, Y1.44 MHz, Z17.28 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 28.8 MHz; or

X is 7.5MHz, Y is 14.04MHz, and Z is 37.44 MHz; or

X is 6.06MHz, Y is 11.16MHz, and Z is 17.28 MHz; or

X＝6.06MHz，Y＝11.16MHz,Z＝18.72MHz。

13. The signal transmission method according to any one of claims 5, 6 and 8,

when the frequency domain position of the first synchronization grid is obtained in the fourth way,

the first synchronization grid is equal to the channel grid of the preset working frequency band; or

14. The signal transmission method according to claim 13, wherein x is 100 and β is 1.

15. The signal transmission method of claim 13, wherein N5 is an odd number greater than or equal to 3, and wherein the first synchronization grid is equal to a maximum, a minimum, or a median of the first and second subcarrier spacings.

16. The signal transmission method according to claim 2,

in a fifth manner, when the frequency domain position of the first synchronization grid is obtained,

17. The signal transmission method according to claim 16,

the first frequency domain range is: 0-3GHz, the second frequency domain range is: 3-6GHz, and the third frequency domain range is: above 24.25 GHz.

18. The signal transmission method according to claim 16,

the a1 is 7.5MHz, the a2 is 14.04MHz, and the a3 is 37.44 MHz; or

The a1 is 6.06MHz, the a2 is 11.16MHz, and the a3 is 18.72 MHz.

19. The signal transmission method according to claim 1, further comprising:

transmitting or receiving at least one of a broadcast channel, a service discovery channel, a data channel, and a control channel on the first synchronization grid of the preset operating frequency band.

20. A communication device, comprising:

the preset working frequency band is a working frequency band of a preset service, and the preset service is a sidelink service, an mMTC service, an NB-IoT service or an IAB service; or, the preset working frequency band is an unauthorized frequency band;

obtaining the first synchronization grid in at least one of:

21. The communication device according to claim 20, wherein the communication device is a terminal or a network side device.

22. A communication device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the signal transmission method as claimed in any one of claims 1 to 19.

23. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the signal transmission method according to any one of claims 1 to 19.