CN109802785A

CN109802785A - A kind of transmission method of timing information, base station, terminal, pocessor and storage media

Info

Publication number: CN109802785A
Application number: CN201711146987.8A
Authority: CN
Inventors: 苗婷; 刘星; 郝鹏; 毕峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2019-05-24
Also published as: WO2019096078A1

Abstract

The invention discloses a kind of transmission method of timing information, base station, terminal, pocessor and storage medias.This method, comprising: obtain demodulated reference signal DMRS, the DMRS that base station is sent and carry timing information, the timing information is used to indicate the information that terminal determines time-domain position；According to preset rules, the timing information is determined, the preset rules are used to indicate the rule that the DMRS is mapped to the occupied resource block RB of Physical Broadcast Channel PBCH in synchronization signal block.It realizes and timing information is sent to terminal, so that terminal obtains time-domain position information, to improve the synchronism between terminal and base station.

Description

Timing information transmission method, base station, terminal, processor and storage medium

Technical Field

The present invention relates to communication technologies, and in particular, to a method for transmitting timing information, a base station, a terminal, a processor, and a storage medium.

Background

In future wireless communication systems (e.g., 5G), higher carrier frequencies are used for communication than those used in fourth generation communication systems, such as 28GHz, 45GHz, etc., and the potential operating band of 5G new RAT (Radio access technology) system reaches 100 GHz. Because the carrier frequency corresponding to the high-frequency communication has shorter wavelength, more antenna elements can be contained in a unit area, and the more antenna elements mean that the antenna gain can be improved by adopting a beam forming method, so that the coverage performance of the high-frequency communication is ensured.

In the process of adopting the beam forming method, the transmitting end can concentrate the transmitting energy in a certain direction, and the energy in other directions is little or none, that is, each beam has own directivity, each beam can only cover the terminal in a certain direction, and the transmitting end, that is, the base station, needs to transmit the beam in dozens or even hundreds of directions to complete the all-round coverage. In the related art, the initial beam direction measurement and identification are performed during the initial access of the terminal to the network, and the base station side transmission beams are polled once in a time interval, so that the terminal measurement can identify the preferred beam or port. Specifically, there are multiple synchronization signal/physical broadcast channel blocks (SS/pbcblock), hereinafter also referred to as Synchronization Signal Blocks (SSB), in a synchronization signal transmission period, each synchronization signal block carries a synchronization signal of a specific beam/port (group), and one synchronization signal transmission period completes one beam scanning, that is, completes transmission of all beams/ports. The synchronization signal block may further include a physical broadcast channel PBCH, a demodulation reference signal corresponding to the PBCH, other control channels, a data channel, and other signals.

In the related art, the synchronization result between the terminal and the base station is poor, and an effective timing information transmission scheme has not been proposed in the related art.

Disclosure of Invention

In order to solve the technical problem, the invention provides a transmission method, a base station, a terminal and a system of timing information, which are used for solving the problem of low efficiency of configuration switching of an embedded smart card.

In order to achieve the object of the present invention, the present invention provides a method for transmitting timing information, comprising:

according to a preset rule, mapping a demodulation reference signal DMRS to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block, wherein the DMRS carries timing information which is used for indicating a terminal to determine information of a time domain position;

and transmitting the DMRS to a terminal.

Further, the DMRS includes at least: a first DMRS type and a second DMRS type;

the first DMRS refers to a sequence generated based on physical cell identification;

the second DMRS refers to a sequence generated based on the physical cell identity and the timing information determined by the time-domain location of the synchronization signal block.

Further, the mapping the DMRS to the resource block RB occupied by the PBCH in the synchronization signal block according to the preset rule includes:

mapping the first DMRS to partial Resource Elements (REs) outside a Synchronous Signal (SS) bandwidth within a PBCH bandwidth of the OFDM symbol with the index of 2, and mapping the second DMRS to partial Resource Elements (REs) within the PBCH bandwidths of the OFDM symbols with the indexes of 1 and 3; or,

and mapping a part of the second DMRS and the first DMRS interval to a part of REs outside an SS bandwidth within a PBCH bandwidth of the OFDM symbols with the index of 1 and the index of 3. Mapping another part of the second DMRS to a part of REs within SS bandwidth of OFDM symbols with indexes 1 and 3 and a part of REs outside SS bandwidth within PBCH bandwidth of OFDM symbols with index 2; or,

mapping the first DMRS to a part of REs outside an SS bandwidth within a PBCH bandwidth of the OFDM symbol with the index of 2, mapping the second DMRS to a part of REs within the PBCH bandwidth of the OFDM symbol with the indexes of 1 and 3, and mapping the second DMRS to a part of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbol with the index of 0; or,

mapping a part of the second DMRS-like and the first DMRS interval to a part of REs within a PBCH bandwidth of the OFDM symbols with indexes 1 and 3 and outside an SS bandwidth, mapping another part of the second DMRS-like to a part of REs within the SS bandwidth of the OFDM symbols with indexes 1 and 3, and mapping the part of REs within the PBCH bandwidth of the OFDM symbols with indexes 0 and 2 and outside the SS bandwidth.

Further, the DMRS refers to a sequence generated based on a physical cell identity and the timing information, and the timing information is determined by a time domain position of the synchronization signal block.

mapping the DMRS to partial Resource Elements (REs) within PBCH bandwidth of the OFDM symbols with indexes 1 and 3 and partial REs outside SS bandwidth within PBCH bandwidth of the OFDM symbols with index 2; or,

and mapping the DMRS to parts of REs within PBCH bandwidth of the OFDM symbols with indexes of 1 and 3 and parts of REs outside SS bandwidth within PBCH bandwidth of the OFDM symbols with indexes of 0 and 2.

Further, the preset rule further includes:

and mapping the DMRS to Resource Blocks (RB) occupied by the PBCH in a synchronous signal block according to the sequence from low frequency to high frequency, namely the sequence from frequency domain to time domain.

Further, the mapping the portion of the second DMRS and the first DMRS interval to the portion of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbols with index 1 and index 3 includes:

mapping a first-type DMRS at an even position among all RE positions of the DMRS on an OFDM symbol having an index of 1, mapping a portion of a second-type DMRS at an odd position, mapping a first-type DMRS at an odd position among all RE positions of the DMRS on an OFDM symbol having an index of 3, and mapping a portion of a second-type DMRS at an even position; or,

the first-type DMRS is mapped at an odd position among all RE positions of the DMRS on an OFDM symbol having an index of 1, and the even position maps a part of the second-type DMRS. The even-numbered positions among all RE positions of the DMRS on an OFDM symbol with index 3 map a first-type DMRS, and the odd-numbered positions map a part of a second-type DMRS.

Further, before the sending the DMRS to the terminal, the method further includes:

sending a time domain mapping mode to the terminal, wherein the time domain mapping mode is carried in PBCH and is used for indicating the information of the mapping mode from the synchronous signal block to the time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

Within a unit time length, two synchronous signal blocks are adjacently arranged, and the two synchronous signal blocks are arranged at intervals.

The invention also provides a transmission method of the timing information, which comprises the following steps:

acquiring a demodulation reference signal DMRS (demodulation reference signal) sent by a base station, wherein the DMRS carries timing information, and the timing information is used for indicating information of a terminal for determining a time domain position;

and determining the timing information according to a preset rule to acquire time domain position information, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block.

Further, the DMRS includes at least: a first DMRS type and a second DMRS type;

Further, the preset rule includes:

mapping the first DMRS to partial Resource Elements (REs) outside the SS bandwidth within the PBCH bandwidth of the OFDM symbol with the index of 2, and mapping the second DMRS to partial Resource Elements (REs) within the PBCH bandwidth of the OFDM symbols with the indexes of 1 and 3; or,

Further, the preset rule includes:

Further, the preset rule further includes:

Further, before determining the timing information according to a preset rule, the method further includes:

acquiring a time domain mapping mode carried by the base station through PBCH, wherein the time domain mapping mode is used for indicating the information of the mapping mode from the synchronous signal block to the time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

The present invention also provides a base station, comprising:

the processing module is used for mapping a demodulation reference signal DMRS to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block according to a preset rule, wherein the DMRS carries timing information, and the timing information is used for indicating information for determining a time domain position of a terminal;

and the transmitting module is used for transmitting the DMRS to a terminal.

Further, the processing module is further configured to map the DMRS to a portion of resource elements REs within a PBCH bandwidth of the OFDM symbols with indexes 1 and 3, and a portion of REs outside an SS bandwidth within the PBCH bandwidth of the OFDM symbol with index 2; or,

Further, the sending module is further configured to send a time domain mapping mode to the terminal, where the time domain mapping mode is carried in a PBCH, and the time domain mapping mode is used to indicate information of a mapping mode from the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

The present invention also provides a terminal, including:

the base station comprises an acquisition module, a demodulation reference signal (DMRS) and a processing module, wherein the DMRS is sent by a base station and carries timing information, and the timing information is used for indicating information for determining a time domain position by a terminal;

and the processing module is used for determining the timing information according to a preset rule, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block.

Further, the preset rule includes:

Further, the obtaining module is further configured to obtain a time domain mapping manner carried by the base station through a PBCH, where the time domain mapping manner is used to indicate information of a mapping manner from the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

The invention also provides a storage medium comprising a stored program, wherein the program is operable to perform any of the methods described above.

The invention also provides a processor for running a program, wherein the program executes to perform any one of the methods described above.

The invention provides a transmission method of timing information, a base station, a terminal, a processor and a storage medium, which are used for acquiring a demodulation reference signal (DMRS) sent by the base station, wherein the DMRS carries the timing information which is used for indicating the information of determining the time domain position by the terminal; and determining the timing information according to a preset rule to acquire time domain position information, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block. The method and the device realize the sending of the timing information to the terminal so that the terminal can acquire the time domain position information, thereby improving the synchronism between the terminal and the base station.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a flowchart illustrating a method for transmitting timing information according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to an embodiment of a method for transmitting timing information according to the present invention;

FIG. 3 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a second embodiment of the transmission method of timing information of the present invention;

FIG. 4 is a flowchart illustrating a timing information transmission method according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a third embodiment of a transmission method of timing information in the present invention;

fig. 6 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a fourth embodiment of the transmission method of timing information in the present invention;

fig. 7 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a fifth embodiment of a transmission method of timing information according to the present invention;

fig. 8 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a sixth embodiment of a transmission method of timing information in the present invention;

fig. 9 is a schematic diagram illustrating a mapping from a synchronization signal block to a time domain according to an embodiment of a transmission method of timing information in the present invention;

fig. 10 is a schematic diagram illustrating a synchronization signal block to time domain mapping according to a second embodiment of the transmission method of timing information in the present invention;

FIG. 11 is a block diagram of a base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an embodiment of the terminal of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The transmission method of the timing information provided by the embodiment of the invention can be particularly applied to the time when the base station sends the timing information to the terminal. The method for transmitting timing information provided by this embodiment may be performed by a terminal and a transmission apparatus of timing information, which may be integrated in a base station or separately provided, wherein the transmission apparatus of timing information may be implemented in a software and/or hardware manner. The following describes a method, an apparatus, a terminal and a system for transmitting timing information provided in the present embodiment in detail.

Fig. 1 is a flowchart illustrating a method for transmitting timing information according to an embodiment of the present invention; as shown in fig. 1, an execution subject of this embodiment may be a transmission apparatus of timing information, such as a base station, and the transmission method of timing information provided by the present invention includes:

step 101, mapping a demodulation reference signal DMRS to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block according to a preset rule.

The DMRS in this embodiment carries timing information, and the timing information is used to indicate information for a terminal to determine a time domain position.

For example, the DMRS includes at least: a first DMRS type and a second DMRS type. Wherein the DMRS of the first type refers to a sequence generated based on physical cell identification;

Specifically, mapping the DMRS to the resource block RB occupied by the PBCH in the synchronization signal block according to a preset rule at least includes the following implementation manners:

in a first implementation manner, the first DMRS is mapped to a part of Resource Elements (REs) outside a Synchronization Signal (SS) bandwidth within a PBCH bandwidth of an OFDM symbol with index 2, and the second DMRS is mapped to a part of Resource Elements (REs) within the PBCH bandwidth of OFDM symbols with index 1 and index 3; or,

and according to the second implementation manner, a part of intervals of the first DMRS and the second DMRS are mapped to the part of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbols with the indexes of 1 and 3. Mapping another part of the second DMRS to a part of REs within SS bandwidth of OFDM symbols with indexes 1 and 3 and a part of REs outside SS bandwidth within PBCH bandwidth of OFDM symbols with index 2; or,

in a third implementation manner, the first type of DMRS is mapped to a part of REs within a PBCH bandwidth of an OFDM symbol with index 2 and outside an SS bandwidth, the second type of DMRS is mapped to a part of REs within the PBCH bandwidth of OFDM symbols with index 1 and index 3, and a part of REs within the PBCH bandwidth of the OFDM symbol with index 0 and outside the SS bandwidth; or,

a fourth implementation is to map a portion of the second DMRS-like and the first DMRS-like interval to a portion of REs within the PBCH bandwidth of OFDM symbols with indices 1 and 3 and outside the SS bandwidth, to map another portion of the second DMRS-like to a portion of REs within the SS bandwidth of OFDM symbols with indices 1 and 3, and to map another portion of the second DMRS-like interval to a portion of REs within the PBCH bandwidth of OFDM symbols with indices 0 and 2 and outside the SS bandwidth.

Fig. 2 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to an embodiment of a method for transmitting timing information according to the present invention; the first implementation manner and the second implementation manner in the embodiment of the present invention may be implemented in a time domain structure as shown in fig. 2, specifically, the synchronization signal block is composed of 4 OFDM symbols in the time domain, and indexes of the 4 OFDM symbols in the synchronization signal block are 0,1,2, and 3 in sequence. PSS is mapped on OFDM symbol with index 0, SSS is mapped on OFDM symbol with index 2, PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 1 and 3, and PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbol with index 2 except for synchronization signal SS bandwidth. In this configuration, the bandwidth of PBCH is equal to or greater than the bandwidth of SS.

FIG. 3 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a second embodiment of the transmission method of timing information of the present invention; the third implementation manner and the fourth implementation manner in the embodiment of the present invention may be implemented in a time domain structure as shown in fig. 3, specifically, the synchronization signal block is composed of 4 OFDM symbols in the time domain, and indexes of the 4 OFDM symbols in the synchronization signal block are 0,1,2, and 3 in sequence. PSS is mapped on OFDM symbol with index 0, SSS is mapped on OFDM symbol with index 2, PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 1 and 3, and PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 0 and 2 except SS bandwidth. In this configuration, the bandwidth of PBCH is equal to or greater than the bandwidth of SS.

Optionally, the DMRS refers to a sequence generated based on a physical cell identifier and the timing information, and the timing information is determined by a time domain position of the synchronization signal block.

in the first implementation manner, the DMRS is mapped to a part of Resource Elements (REs) within the PBCH bandwidth of the OFDM symbols with indexes 1 and 3, and a part of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbol with index 2; specifically, the first implementation manner in this embodiment may be implemented in a time domain structure as shown in fig. 2. Or,

in a second implementation, the DMRS is mapped to parts of REs within the PBCH bandwidth of OFDM symbols with indices 1 and 3, and to parts of REs outside the SS bandwidth within the PBCH bandwidth of OFDM symbols with indices 0 and 2. Specifically, the second implementation manner in this embodiment may be implemented in a time domain structure as shown in fig. 3.

And step 102, transmitting the DMRS to a terminal.

In this embodiment, the DMRS is sent to a terminal, so that the terminal acquires time domain position information. According to a preset rule, mapping a demodulation reference signal DMRS to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block, wherein the DMRS carries timing information which is used for indicating a terminal to determine information of a time domain position; and sending the DMRS to a terminal so that the terminal can acquire time domain position information. The method and the device realize the sending of the timing information to the terminal so that the terminal can acquire the time domain position information, thereby improving the synchronism between the terminal and the base station.

Further, on the basis of the foregoing embodiment, the preset rule further includes:

Preferably, on the basis of the above embodiment, the mapping of the part of the second-type DMRS and the first-type DMRS interval to the part of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbols with index 1 and index 3 includes:

Further, on the basis of the foregoing embodiment, before the transmitting the DMRS to the terminal, the method further includes:

the mapping mode from the synchronization signal block to the time domain is carried in PBCH and is used for indicating the information of the mapping mode from the synchronization signal block to the time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

Further, the unit duration is different for the synchronization signal blocks of different subcarrier intervals. Typically, for subcarrier spacing of 15kHz and 30kHz, the unit duration is 1 millisecond; for subcarrier spacings of 120kHz and 240kHz, the unit duration is 0.25 milliseconds.

FIG. 4 is a flowchart illustrating a timing information transmission method according to a second embodiment of the present invention; as shown in fig. 4, the execution subject of this embodiment may be a terminal, and the transmission method of timing information provided by the present invention includes:

step 401, acquiring a demodulation reference signal DMRS sent by a base station.

The DMRS in this example carries timing information, and the timing information is used to indicate information for a terminal to determine a time domain position.

Step 402, determining the timing information according to a preset rule.

In this embodiment, the time domain position information may be acquired by the timing information. The preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block.

Specifically, the preset rule at least includes the following implementation manners:

in a first implementation manner, the first DMRS is mapped to a part of Resource Elements (REs) outside an SS bandwidth within a PBCH bandwidth of an OFDM symbol with index 2, and the second DMRS is mapped to a part of Resource Elements (REs) within the PBCH bandwidth of OFDM symbols with index 1 and index 3; or,

and mapping a part of the second DMRS-like and the first DMRS interval to a part of REs outside an SS (subscriber station) bandwidth within a PBCH bandwidth of the OFDM symbols with the index of 1 and the index of 3. Mapping another part of the second DMRS to a part of REs within SS bandwidth of OFDM symbols with indexes 1 and 3 and a part of REs outside SS bandwidth within PBCH bandwidth of OFDM symbols with index 2; or,

The first implementation manner and the second implementation manner in the embodiment of the present invention may be implemented in a time domain structure as shown in fig. 2, specifically, the synchronization signal block is composed of 4 OFDM symbols in the time domain, and indexes of the 4 OFDM symbols in the synchronization signal block are 0,1,2, and 3 in sequence. PSS is mapped on OFDM symbol with index 0, SSS is mapped on OFDM symbol with index 2, PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 1 and 3, and PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbol with index 2 except SS bandwidth. In this configuration, the bandwidth of PBCH is equal to or greater than the bandwidth of SS.

The third implementation manner and the fourth implementation manner in the embodiment of the present invention may be implemented in a time domain structure as shown in fig. 2, specifically, the synchronization signal block is composed of 4 OFDM symbols in the time domain, and indexes of the 4 OFDM symbols in the synchronization signal block are 0,1,2, and 3 in sequence. PSS is mapped on OFDM symbol with index 0, SSS is mapped on OFDM symbol with index 2, PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 1 and 3, and PBCH is mapped on other REs except REs occupied by DMRS on OFDM symbols with index 0 and 2 except SS bandwidth. In this configuration, the bandwidth of PBCH is equal to or greater than the bandwidth of SS.

In this embodiment, a demodulation reference signal DMRS sent by a base station is obtained, where the DMRS carries timing information, and the timing information is used to indicate information for a terminal to determine a time domain position; and determining the timing information according to a preset rule to acquire time domain position information, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block. The method and the device realize the sending of the timing information to the terminal so that the terminal can acquire the time domain position information, thereby improving the synchronism between the terminal and the base station.

On the basis of the above embodiment, before determining the timing information according to a preset rule, the method further includes:

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

Fig. 5 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a third embodiment of a transmission method of timing information in the present invention; as shown in fig. 5, the method for transmitting timing information provided by the present invention includes: and mapping the first DMRS to partial Resource Elements (REs) outside the SS bandwidth within the PBCH bandwidth of the OFDM symbol with the index of 2, and mapping the second DMRS to partial Resource Elements (REs) within the PBCH bandwidth of the OFDM symbols with the indexes of 1 and 3.

Specifically, the first type DMRS is mapped to part of resource elements REs outside the SS bandwidth of the OFDM symbol with index 2, and the second type sequence is mapped to part of REs of the OFDM symbol with index 1 and index 3;

typically, as shown in fig. 2, the synchronization signal bandwidth is X RBs, the PBCH bandwidth is Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, assuming that the frequency-domain density of DMRSs is 1/4, and thus the length of the first type of DMRS is (Y-X) × 12/4 ═ 3 (Y-X); the length of the second DMRS is 2 × Y12/4 ═ 6Y. Typical values for X and Y are 12 and 20, or others.

Preferably, the first class which does not carry timing informationMapping to complex-valued modulation symbols a according to equation 1-1 in order from low to high frequencies_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cellAnd (5) identifying.

Equation 1-1 is as follows:

l＝2

m＝0，1，...，3(Y-X)-1

preferably, the second type dmrsr (m) carrying timing information is mapped to the complex-valued modulation symbol a according to the following formula 1-2 from low frequency to high frequency, and then from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

Equations 1-2 are as follows:

a_k，l＝r(3Yl′+m′)

k＝4m′+v_shift

m′＝0，1，...，3Y-1

in this mapping manner, since the first-type DMRS is generated based on the physical cell identifier and does not carry timing information, the terminal can know the first-type DMRS after completing downlink synchronization to acquire the physical cell identifier. Therefore, the terminal can perform channel estimation by using the first-class DMRS and the SSS sequence, and the result of the channel estimation is used for coherent detection of the second-class DMRS, so that the detection performance of the second-class DMRS carrying timing information is improved.

Fig. 6 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a fourth embodiment of the transmission method of timing information in the present invention; as shown in fig. 6, the method for transmitting timing information provided by the present invention includes: and mapping a part of the second DMRS and the first DMRS interval to a part of REs outside an SS bandwidth within a PBCH bandwidth of the OFDM symbols with the index of 1 and the index of 3. And mapping the other part of the second DMRS to the parts of REs which are within the SS bandwidth of the OFDM symbols with indexes 1 and 3 and outside the SS bandwidth within the PBCH bandwidth of the OFDM symbol with index 2.

Specifically, a first DMRS type is mapped to an even position among all RE positions of the DMRS on an OFDM symbol with an index of 1, a part of a second DMRS type is mapped to an odd position, a first DMRS type is mapped to an odd position among all RE positions of the DMRS on an OFDM symbol with an index of 3, and a part of a second DMRS type is mapped to an even position; or,

As shown in fig. 6, the SS bandwidth is X RBs, the PBCH bandwidth is Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, and assuming that the frequency domain density of the DMRSs is 1/4, when the first-type DMRS and the second-type DMRS are mapped at intervals, the density of each-type DMRS becomes 1/8, so that the length of the first-type DMRS is 2 × 3(Y-X) × 12/8 ═ 3 (Y-X); the density of one part of the second DMRS is 1/8, and the density of the other part of the second DMRS is 1/4, so that the length of the second DMRS is 3(Y-X) + 2X 12/4+ (Y-X) × 12/4 ═ 6Y, that is, the length of the two DMRS is identical to that of the above example. Typical values for X and Y are 12 and 20, or others.

Preferably, the DMRS of the first type that does not carry timing information isMapping to complex-valued modulation symbols a according to equation 2-1 in order from low to high frequencies_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

Equation 2-1:

m′＝0，1，...，(Y-X)*3/2-1

preferably, the second type dmrsr (m) carrying timing information is mapped to the complex modulation symbol a according to the following formulas 2-2 and 2-3 from low frequency to high frequency, and from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

A portion of the second DMRS is mapped to OFDM symbols with indices 1 and 3 using equation 2-2:

equation 2-2 is as follows:

whereinWhich means that the rounding is made up,indicating a rounding down.

Another portion of the second-type DMRS is mapped to a portion of REs outside the SS bandwidth on the OFDM symbol with index 2 using equations 2-3.

Equations 2-3:

l＝2

m＝0，1，...，3(Y-X)-1

for the interval mapping of the portions of the first and second DMRSs on the OFDM symbols with indexes 1 and 3, the above equations 2-1 and 2-2 map the first DMRS with "even positions among all RE positions of the DMRSs on the OFDM symbol with index 1, and the odd positions map the portions of the second DMRS. And mapping the first-type DMRS at the odd position in all RE positions of the DMRS on the OFDM symbol with the index of 3, and mapping a part of the second-type DMRS at the even position.

For other interval mapping modes, specific mapping formulas can be easily given by referring to formulas 2-1 and 2-2, and are not described herein again.

In this mapping manner, since the first-type DMRS is generated based on the physical cell identifier and does not carry timing information, the terminal can know the first-type DMRS after completing downlink synchronization to acquire the physical cell identifier. Therefore, the terminal can perform channel estimation by using the first-class DMRS and the SSS sequence, and the result of the channel estimation is used for coherent detection of the second-class DMRS, so that the detection performance of the DMRS carrying timing information is improved. The time-frequency domain of the first-type DMRS mapping is different from the SSS, so that the channel estimation performance is better.

Fig. 7 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a fifth embodiment of a transmission method of timing information according to the present invention; as shown in fig. 7, the method for transmitting timing information provided by the present invention includes: and mapping the first DMRS to the part of REs within the PBCH bandwidth of the OFDM symbol with the index of 2 and outside the SS bandwidth, and mapping the second DMRS to the part of REs within the PBCH bandwidth of the OFDM symbol with the indexes of 1 and 3, and the part of REs within the PBCH bandwidth of the OFDM symbol with the index of 0 and outside the SS bandwidth.

As shown in fig. 7, the SS bandwidth is X RBs, the PBCH bandwidth is Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, assuming that the frequency-domain density of DMRSs is 1/4, and thus the length of the first type of DMRS is (Y-X) × 12/4 ═ 3 (Y-X); the length of the second DMRS is 3(Y-X) + 2X Y12/4 ═ 9Y-3X. Typical values for X and Y are 12 and 20, or typical values for X and Y are 12 and 18, or others.

Preferably, the first class which does not carry timing informationMapping to complex-valued modulation symbols a according to common 1-1 in order from low to high frequency_k，lThe above.

Preferably, the DMRS of the second type carrying timing information is r (m), and is mapped to the complex-valued modulation symbol a according to equations 3-1 and 3-2 from low frequency to high frequency, and in sequence from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

A portion of the second DMRS is mapped to an OFDM symbol with index 0 using equation 3-1:

equation 3-1 is as follows:

a_k，l＝r(m)

l＝0

m＝0，1，...，3(Y-X)-1

another portion of the second DMRS is mapped to OFDM symbols with indexes 1 and 3 using equation 3-2:

equation 3-2:

a_k，l＝r(3Yl′+3(Y-X)+m′)

k＝4m′+v_shift

m′＝0，1，...，3Y-1

in this embodiment, in this mapping manner, the PBCH occupies more resources, and since the length of the first DMRS that does not carry timing information is not changed, the length of the second DMRS that carries timing information is longer, and therefore the detection performance of the PBCH and the second DMRS is further improved, but since the PBCH is mapped on both sides of the PSS bandwidth, the power improvement of the PSS may be affected while the PSS frequency domain guard band is reduced, and therefore the detection performance of the PSS may be reduced.

Fig. 8 is a schematic diagram of a time-frequency domain structure of a synchronization signal block according to a sixth embodiment of a transmission method of timing information in the present invention; as shown in fig. 8, the method for transmitting timing information provided by the present invention includes: mapping a part of the second DMRS-like and the first DMRS interval to a part of REs within a PBCH bandwidth of the OFDM symbols with indexes 1 and 3 and outside an SS bandwidth, mapping another part of the second DMRS-like to a part of REs within the SS bandwidth of the OFDM symbols with indexes 1 and 3, and mapping the part of REs within the PBCH bandwidth of the OFDM symbols with indexes 0 and 2 and outside the SS bandwidth.

As shown in fig. 8, the SS bandwidth is X RBs, the PBCH bandwidth is Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, and assuming that the frequency domain density of the DMRSs is 1/4, when the first-type DMRS and the second-type DMRS are mapped at intervals, the density of each-type DMRS becomes 1/8, so that the length of the first-type DMRS is 2 × 3(Y-X) × 12/8 ═ 3 (Y-X); the length of the second DMRS is 9(Y-X) + 2X 12/4 ═ 9Y-3X, i.e., the length of the two DMRSs is exactly the same as in example 1. Typical values for X and Y are 12 and 20, or typical values for X and Y are 12 and 18.

Preferably, the DMRS of the second type carrying timing information is r (m), and is mapped to the complex-valued modulation symbol a according to equations 4-1 and 4-2 from low frequency to high frequency, and in sequence from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

A portion of the second DMRS is mapped to OFDM symbols with indexes 1 and 3 using equation 4-1:

equation 4-1:

whereinWhich means that the rounding is made up,indicating a rounding down.

Another portion of the second-type DMRS is mapped to a portion of REs outside the SS bandwidth on OFDM symbols with indexes 0 and 2 using equation 4-2.

Equation 4-2 is as follows:

m＝0，1，...，3(Y-X)-1

for the interval mapping of the portions of the first and second DMRSs on the OFDM symbols with indexes 1 and 3, the above equations 2-1 and 4-1 map the first DMRS with "even positions among all RE positions of the DMRSs on the OFDM symbol with index 1, and the odd positions map the portions of the second DMRS. And mapping the first-type DMRS at the odd position in all RE positions of the DMRS on the OFDM symbol with the index of 3, and mapping a part of the second-type DMRS at the even position.

For other interval mapping modes, specific mapping formulas can be easily given by referring to formulas 2-1 and 4-1, and are not described herein again.

In this mapping manner, since the first-type DMRS is generated based on the physical cell identifier and does not carry timing information, the terminal can know the first-type DMRS after completing downlink synchronization to acquire the physical cell identifier. Therefore, the terminal can perform channel estimation by using the first-class DMRS and the SSS sequence (or perform channel estimation by combining with the PSS), and the result of the channel estimation is used for coherent detection of the second-class DMRS, so that the detection performance of the DMRS carrying timing information is improved. Since the time-frequency domain mapped by the first-type DMRS is different from that mapped by the synchronization signal, the channel estimation effect is better.

An embodiment of the present invention further provides a transmission method of timing information, where as shown in fig. 2, a DMRS refers to a sequence generated based on a physical cell identifier and the timing information, and a first implementation manner of the timing information is as follows in a scenario where the timing information is determined by a time domain position of the synchronization signal block: the DMRS is mapped to the RBs where the PBCH is located, the bandwidth of a synchronization signal is assumed to be X RBs, the bandwidth of the PBCH is assumed to be Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, and assuming that the frequency domain density of the DMRS is 1/4, the length of the DMRS is therefore [2Y + (Y-X) ] 12/4-9Y-3X. Typical values for X and Y are 12 and 20.

The DMRS is r (m), and is mapped to a complex-valued modulation symbol a according to a formula 5-1 and a formula 5-2 from low frequency to high frequency and in sequence from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

A portion of the DMRS is mapped to an OFDM symbol with index 2 using equation 5-1:

equation 5-1:

a_k，l＝r(3Y+m′)

l＝0

m′＝0，1...，3(Y-X)-1

another portion of the DMRS is mapped to OFDM symbols with indices 1 and 3 using equation 5-2:

equation 5-2:

a_k，l＝r((6Y-3X)l′+m′)

k＝4m′+v_shift

m′＝0，1，...，3Y-1

in the mapping mode, as the DMRS carries timing information, a terminal only knows that the DMRS is one of 8 DMRSs before acquiring timing and cannot determine which DMRS is the other DMRS, two methods for detecting the DMRS exist, wherein the method comprises a coherent detection algorithm and a non-coherent detection algorithm, namely coherent detection is carried out by utilizing the result of SSS channel estimation within an SS bandwidth, non-coherent detection is adopted outside the SS bandwidth, and the algorithm is simple but has poor performance; the second method adopts a generalized likelihood ratio detection algorithm, the algorithm adopts maximum likelihood channel estimation, the complexity is higher, but the performance is better than the first method.

An embodiment of the present invention further provides a transmission method of timing information, where as shown in fig. 3, a DMRS refers to a sequence generated based on a physical cell identifier and the timing information, and a specific implementation manner of a second implementation manner in a scenario where the timing information is determined by a time domain position of the synchronization signal block is as follows: the DMRS is mapped to the RBs where the PBCH is located, the bandwidth of a synchronization signal is assumed to be X RBs, the bandwidth of the PBCH is assumed to be Y RBs, and (Y-X)/2 is a positive integer. Each RB consists of 12 subcarriers in the frequency domain, and assuming that the frequency domain density of the DMRS is 1/4, the length of the DMRS is therefore [2Y +2(Y-X) ] 12/4 ═ 12Y-6X. Typical values for X and Y are 12 and 20, or typical values for X and Y are 12 and 18, or others.

The DMRS is r (m), is mapped to a complex modulation symbol a according to a formula 6-1 and a formula 6-2 from low frequency to high frequency and in sequence from frequency domain to time domain_k，lWhere k and l denote a subcarrier index and an OFDM symbol index, respectively, within the synchronization signal block,is a physical cell identity.

A portion of DMRS is mapped to OFDM symbols with indexes 0 and 2 using equation 6-1:

equation 6-1:

a_k，l＝r((6Y-3X)l′+m′)

m′＝0，1，...，3(Y-X)-1

another portion of the DMRS is mapped to OFDM symbols with indexes 1 and 3 using equation 6-2:

equation 6-2:

a_k，l＝r((6Y-3X)l′+3(Y-X)+m′)

k＝4m′+v_shift

m′＝0，1，...，3Y-1

in this embodiment, in this mapping manner, the PBCH and the DMRS occupy resources of symbols 0 and 2 outside the SS bandwidth in addition to symbols 1 and 3 of the synchronization signal block, so that the PBCH occupies more resources and the DMRS is longer, so that the demodulation performance of the PBCH is better and the detection performance of the DMRS is better.

Fig. 9 is a schematic diagram illustrating a mapping from a synchronization signal block to a time domain according to an embodiment of a transmission method of timing information in the present invention; fig. 10 is a schematic diagram illustrating a synchronization signal block to time domain mapping according to a second embodiment of the transmission method of timing information in the present invention; as shown in fig. 9 and fig. 10, the method for transmitting timing information provided by the present invention may further include: sending a time domain mapping mode to the terminal, wherein the time domain mapping mode is carried in PBCH and is used for indicating the information of the mapping mode from the synchronous signal block to the time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

Specifically, in the frequency band below 6GHz, there are two mapping manners for the synchronization signal block with the subcarrier spacing of 30kHz to the time domain, and fig. 9 and 10 show two mapping manners for the synchronization signal block with the subcarrier spacing of 30kHz within 1 millisecond time, and in order to clearly show the synchronization signal block, the adjacent synchronization signal blocks are marked with two different shadings. The time granularity in the horizontal direction is at the OFDM symbol level, i.e. one grid represents one OFDM symbol and the duration of the OFDM symbol is inversely scaled with the subcarrier spacing, the uppermost numbers in fig. 9 and 10 indicate the OFDM symbol index corresponding to the subcarrier spacing of 15kHz in 1 millisecond time.

Obviously, because the distances from the synchronization signal blocks with the same index to the slot boundary are different in different mapping modes, the timing information cannot be accurately acquired only by means of the synchronization signal block index, and the mapping mode of the synchronization signal block needs to be known, indicating that the two mapping modes need 1-bit information. Therefore, PBCH can be used to carry 1-bit information for indicating the mapping manner of the synchronization signal block to the time domain.

Of course, the synchronization signal block is not limited to a subcarrier spacing of 30 kHz. If there are two mapping methods for the synchronization signal blocks with other subcarrier intervals to the time domain, the 1-bit information may also be used to indicate which mapping method is used.

FIG. 11 is a block diagram of a base station according to an embodiment of the present invention; as shown in fig. 11, the base station provided by the present invention includes: a processing module 1101 and a sending module 1102. Wherein,

a processing module 1101, configured to map, according to a preset rule, a demodulation reference signal DMRS to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block, where the DMRS carries timing information, and the timing information is used to indicate a terminal to determine information of a time domain position;

a sending module 1102, configured to send the DMRS to a terminal.

In this embodiment, a demodulation reference signal DMRS sent by a base station is obtained, where the DMRS carries timing information, and the timing information is used to indicate information for a terminal to determine a time domain position; and determining the timing information according to a preset rule, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronous signal block. The method and the device realize the sending of the timing information to the terminal so that the terminal can acquire the time domain position information, thereby improving the synchronism between the terminal and the base station.

Further, on the basis of the above embodiments, the DMRS includes at least: a first DMRS type and a second DMRS type;

Further, on the basis of the foregoing embodiment, the processing module 1101 is further configured to map the first DMRS to a part of resource elements, REs, within a PBCH bandwidth of an OFDM symbol with index 2 and outside an SS bandwidth, and map the second DMRS to a part of resource elements, REs, within a PBCH bandwidth of OFDM symbols with indexes 1 and 3; or,

and mapping a part of the second DMRS and the first DMRS interval to a part of REs outside an SS bandwidth within a PBCH bandwidth of the OFDM symbols with the index of 1 and the index of 3. Mapping another part of the second DMRS to the part of REs within SS bandwidth of the OFDM symbols with indexes 1 and 3 and outside the SS bandwidth within PBCH bandwidth of the OFDM symbol with index 2; or,

mapping the first DMRS to the part of REs within the PBCH bandwidth of the OFDM symbol with the index of 2 and outside the SS bandwidth, and mapping the second DMRS to the part of REs within the PBCH bandwidth of the OFDM symbol with the index of 1 and 3, the part of REs within the PBCH bandwidth of the OFDM symbol with the index of 0 and outside the SS bandwidth; or,

Further, on the basis of the above embodiment, the DMRS refers to a sequence generated based on a physical cell identity and the timing information, and the timing information is determined by a time domain position of the synchronization signal block.

Further, on the basis of the foregoing embodiment, the processing module 1101 is further configured to map the DMRS to a portion of resource elements REs within a PBCH bandwidth of OFDM symbols with indexes 1 and 3, and a portion of REs outside an SS bandwidth and within the PBCH bandwidth of OFDM symbols with index 2; or,

and mapping the DMRS to partial REs within PBCH bandwidth of the OFDM symbols with indexes of 1 and 3, and partial REs within PBCH bandwidth of the OFDM symbols with indexes of 0 and 2 and outside SS bandwidth.

Further, on the basis of the foregoing embodiment, the processing module 1101 is further configured to map the DMRS to the resource block RB occupied by the PBCH in the synchronization signal block according to a sequence from a low frequency to a high frequency, and from the first frequency domain to the second time domain.

Further, on the basis of the above embodiment, the processing module 1101 is further configured to map a first DMRS type at an even position among all RE positions of the DMRS on an OFDM symbol with an index of 1, map a part of a second DMRS type at an odd position, map a first DMRS type at an odd position among all RE positions of the DMRS on an OFDM symbol with an index of 3, and map a part of a second DMRS type at an even position; or,

Further, on the basis of the foregoing embodiment, the sending module 1102 is further configured to send a time domain mapping manner to the terminal, where the time domain mapping manner is carried in PBCH, and the time domain mapping manner is used to indicate information of a mapping manner from the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

FIG. 12 is a block diagram of a terminal according to an embodiment of the present invention; as shown in fig. 12, the base station provided in the present invention includes: an obtaining module 1201 and a processing module 1202. Wherein,

an obtaining module 1201, configured to obtain a demodulation reference signal DMRS sent by a base station, where the DMRS carries timing information, and the timing information is used to indicate a terminal to determine information of a time domain position;

a processing module 1202, configured to determine the timing information according to a preset rule to obtain time domain position information, where the preset rule is used to indicate a rule that the DMRS is mapped to a resource block RB occupied by a physical broadcast channel PBCH in a synchronization signal block.

Further, on the basis of the foregoing embodiment, the preset rule includes:

and mapping a part of the second DMRS and the first DMRS interval to a part of REs outside the SS bandwidth within the PBCH bandwidth of the OFDM symbols with the index of 1 and the index of 3. Mapping another part of the second DMRS to the part of REs within SS bandwidth of the OFDM symbols with indexes 1 and 3 and outside the SS bandwidth within PBCH bandwidth of the OFDM symbol with index 2; or,

Further, on the basis of the foregoing embodiment, the preset rule includes:

mapping the DMRS to partial Resource Elements (REs) within PBCH bandwidth of the OFDM symbols with indexes 1 and 3, and partial REs within PBCH bandwidth of the OFDM symbols with index 2 and outside SS bandwidth; or,

and mapping the DMRS to Resource Blocks (RB) occupied by the PBCH in the synchronous signal blocks according to the sequence from low frequency to high frequency, namely, the sequence from the frequency domain to the time domain.

Further, on the basis of the foregoing embodiment, the mapping, within a PBCH bandwidth of OFDM symbols with index 1 and index 3, of the part of the second-type DMRS and the first-type DMRS interval to the part of REs outside an SS bandwidth includes:

Further, on the basis of the foregoing embodiment, the obtaining module 1201 is further configured to obtain a time domain mapping manner carried by the base station through a PBCH, where the time domain mapping manner is used to indicate information of a mapping manner from the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

In this embodiment, sending timing information to the terminal is implemented, so that the terminal obtains time domain position information, thereby improving the synchronization between the terminal and the base station.

An embodiment of the present invention further provides a system, including: a base station as described above with respect to fig. 11, and a terminal as described above with respect to fig. 12.

An embodiment of the present invention further provides a processor, including: the processor is configured to execute a program, wherein the program executes the method described above with reference to fig. 1-10.

An embodiment of the present invention further provides a storage medium, including: the storage medium comprises a stored program, wherein the program when executed performs the method described above with reference to fig. 1-10.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical units; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method of transmitting timing information, comprising:

and transmitting the DMRS to a terminal.

2. The method of claim 1, wherein the DMRS comprises at least: a first DMRS type and a second DMRS type;

3. The method of claim 2, wherein the mapping, according to a preset rule, the DMRS into the resource block RB occupied by the PBCH in the synchronization signal block comprises:

mapping a part of the second DMRS-like and the first DMRS-like interval to a part of REs within a PBCH bandwidth of the OFDM symbols with indexes 1 and 3 and outside an SS bandwidth, mapping another part of the second DMRS-like to a part of REs within the SS bandwidth of the OFDM symbols with indexes 1 and 3 and a part of REs within the PBCH bandwidth of the OFDM symbols with index 2 and outside the SS bandwidth; or,

4. The method of claim 1, wherein the DMRS refers to a sequence generated based on a physical cell identity and the timing information determined by a time domain location of the synchronization signal block.

5. The method of claim 4, wherein the mapping, according to a preset rule, the DMRS to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronization signal block comprises:

6. The method of claim 1, wherein the pre-set rule further comprises:

7. The method of claim 3, wherein mapping the portion of the second-type DMRS and the first-type DMRS interval to a portion of REs outside an SS bandwidth within a PBCH bandwidth of an OFDM symbol with index 1 and index 3 comprises:

a first-type DMRS is mapped to an odd position among all RE positions of the DMRS on an OFDM symbol having an index of 1, an even position is mapped to a portion of a second-type DMRS, a first-type DMRS is mapped to an even position among all RE positions of the DMRS on an OFDM symbol having an index of 3, and an odd position is mapped to a portion of a second-type DMRS.

8. The method according to any of claims 1-7, wherein, prior to the transmitting the DMRS to the terminal, further comprising:

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

9. A method of transmitting timing information, comprising:

and determining the timing information according to a preset rule, wherein the preset rule is used for indicating a rule that the DMRS is mapped to a Resource Block (RB) occupied by a Physical Broadcast Channel (PBCH) in a synchronous signal block.

10. The method of claim 9, wherein the DMRS comprises at least: a first DMRS type and a second DMRS type;

11. The method of claim 10, wherein the preset rules comprise:

12. The method of claim 9, wherein the DMRS refers to a sequence generated based on a physical cell identity and the timing information determined by a time-domain location of the synchronization signal block.

13. The method of claim 12, wherein the preset rules comprise:

14. The method of claim 9, wherein the pre-set rule further comprises:

15. The method of claim 11, wherein the mapping the portion of the second-type DMRS and the first-type DMRS interval to a portion of REs outside of an SS bandwidth within a PBCH bandwidth of an OFDM symbol with index 1 and index 3 comprises:

16. The method according to any one of claims 9-15, wherein before determining the timing information according to a preset rule, further comprising:

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

17. A base station, comprising:

and the transmitting module is used for transmitting the DMRS to a terminal.

18. The base station of claim 17, wherein the processing module is further configured to map the DMRS to a portion of Resource Elements (REs) within a PBCH bandwidth of OFDM symbols with indices 1 and 3 and to a portion of REs outside a SS bandwidth within the PBCH bandwidth of OFDM symbols with index 2; or,

19. The base station according to claim 17-or 18, wherein the sending module is further configured to send a time domain mapping manner to the terminal, where the time domain mapping manner is carried in PBCH, and the time domain mapping manner is used to indicate information of a mapping manner of the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

20. A terminal, comprising:

21. The terminal of claim 20, wherein the preset rule comprises:

22. The terminal of claim 20 or 21, wherein the obtaining module is further configured to obtain a time domain mapping manner carried by the base station through PBCH, and the time domain mapping manner is used to indicate information of a mapping manner from the synchronization signal block to a time domain;

the mapping mode comprises the following steps:

setting each synchronous signal block at intervals in a unit time length; or

23. A storage medium comprising a stored program, wherein the program when executed performs the method of any one of claims 1 to 16.

24. A processor, configured to run a program, wherein the program when running performs the method of any one of claims 1 to 16.