WO2019136727A1

WO2019136727A1 - Method for determining frequency domain location of synchronization signal block, terminal device and network device

Info

Publication number: WO2019136727A1
Application number: PCT/CN2018/072510
Authority: WO
Inventors: 唐海
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2019-07-18
Also published as: CN110710301B; CN110710301A

Abstract

Provided are a method for determining the frequency domain location of a synchronization signal block, a terminal device and a network device. The method comprises: the terminal device receives first indication information sent by the network device, the first indication information being used to indicate a subcarrier spacing (SCS), or the first indication information being used to indicate information about the frequency domain location of a synchronization signal block; and the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information when the first indication information is used to indicate the information about the frequency domain location of the synchronization signal block. According to the embodiments of the present application, the network device indicates information about the frequency domain location of a synchronization signal block by multiplexing first indication information, which may effectively improve the accuracy of the frequency domain location of the synchronization signal block.

Description

Method, terminal device and network device for determining a frequency domain position of a sync signal block

Technical field

Embodiments of the present invention relate to the field of communications, and, more particularly, to a method, terminal device, and network device for determining a frequency domain location of a synchronization signal block.

Background technique

In the prior art, when the terminal device determines the frequency domain location of the synchronization block (SS block), the terminal device indicates that the synchronization raster of the second SS block is offset from the synchronization raster of the first SS block. value.

More specifically, through a physical resource block (PRB) grid offset (grid offset) in the information domain, and the remaining system information (Remaining System Information, RMSI) control resource set (Control Resource Set, CORESET) 8-bit joint indication in the information field.

Although there are four reserved values in the PRB grid offset information field: R0, R1, R2, R3, the four reserved values, combined with the 8-bit indication in the CORESET information field of the RMSI, may indicate the location of 1024 synchronous rasters.

However, for the band n77, which contains a total of 620 sync raster positions, the positions to be indicated include -619, ..., -1, +1, ..., +619, a total of 1238 indication positions, At this point, the existing indications do not fully indicate these locations.

Summary of the invention

A frequency domain location, terminal device and network device for determining a sync signal block are provided. The accuracy of the frequency domain position of the sync signal block can be effectively improved.

In a first aspect, a method of determining a frequency domain location of a synchronization signal block is provided, the method comprising:

Receiving, by the terminal device, first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

When the first indication information is used to indicate the information of the frequency domain location of the synchronization signal block, the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information.

In the embodiment of the present application, the network device indicates the information of the frequency domain location of the synchronization signal block by multiplexing the first indication information; and the accuracy of the frequency domain location of the synchronization signal block can be effectively improved.

In some possible implementations, before the determining, by the terminal device, the frequency domain location of the synchronization signal block according to the first indication information, the method further includes:

The terminal device determines whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Receiving, by the terminal device, second indication information that is sent by the network device, where the second indication information is used to indicate a reserved value in a physical resource block PRB grid offset information field, where the PRB grid offset information field The reserved value is used to indicate that the remaining system information RMSI does not exist in the downlink transmission of the terminal device;

The determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, includes:

The terminal device determines, according to the second indication information, that the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementations, the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain location of the synchronization signal block.

In some possible implementation manners, the second indication information includes four of the reserved values.

In some possible implementation manners, the determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block includes:

The terminal device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

And determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, based on the number of synchronization grids in the frequency band in which the terminal device sends the first indication information.

In some possible implementations, the terminal device determines whether the first indication information is used to indicate a synchronization signal, based on the number of synchronization grids in the frequency band in which the terminal device sends the first indication information. The frequency domain location of the block, including:

When the terminal device determines that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementations, the preset threshold is 512.

In some possible implementation manners, the subcarrier spacing includes a subcarrier spacing of a physical downlink shared channel PDSCH that carries at least one of the following information:

The remaining system information RMSI, the message 2/4 in the random access procedure, and other system information OSI are carried.

In some possible implementations, the first indication information includes 1 bit.

Receiving, by the terminal device, third indication information that is sent by the network device, where the third indication information is used to indicate information of a control resource set, or the third indication information is used to indicate a frequency domain of the synchronization signal block position.

The terminal device determines, according to the second indication information, that the third indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementation manners, the terminal device determines, according to the first indication information, a frequency domain location of the synchronization signal block, including:

The terminal device determines a frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and/or the third indication information.

In some possible implementations, the third indication information includes 8 bits.

In a second aspect, a method of determining a location of a sync signal block is provided, comprising:

The network device generates first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

When the network device sends the first indication information to the terminal device, so that the first indication information is used to indicate the information of the frequency domain location of the synchronization signal block, the terminal device is configured according to the first indication information, Determine the frequency domain position of the sync signal block.

In some possible implementations, before the generating, by the network device, the first indication information, the method further includes:

The network device determines whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementation manners, the determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block includes:

When the network device determines that there is no remaining system information RMSI in the downlink transmission of the terminal device, determining that the first indication information is used to indicate a frequency domain location of the synchronization signal block.

The network device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementations, the determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block includes:

And determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, based on the number of synchronization grids in the frequency band in which the terminal device sends the first indication information.

In some possible implementations, the network device determines, according to the number of synchronization grids in the frequency band in which the terminal information is sent by the terminal device, whether the first indication information is used to indicate a synchronization signal. The frequency domain location of the block, including:

When the network device determines that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In some possible implementations, the preset threshold is 512.

In some possible implementations, the method further includes:

When the network device determines that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, generates second indication information, where the second indication information is used to indicate a reserved value in a physical resource block PRB grid offset information field. The reserved value in the PRB grid offset information field is used to indicate that the remaining system information RMSI does not exist in the downlink transmission of the terminal device;

The network device sends the second indication information to the terminal device.

In some possible implementations, the method further includes:

The network device sends third indication information to the terminal device, where the third indication information is used to indicate information of a control resource set, or the third indication information is used to indicate a frequency domain location of the synchronization signal block. .

In some possible implementations, before the sending, by the network device, the third indication information to the terminal device, the method further includes:

When the network device determines that there is no remaining system information RMSI in the downlink transmission of the terminal device, determining that the third indication information is used to indicate a frequency domain location of the synchronization signal block.

In a third aspect, a terminal device is provided, including:

a transceiver unit, configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

And a processing unit, configured to determine, according to the first indication information, a frequency domain location of the synchronization signal block, when the first indication information is used to indicate information about a frequency domain location of the synchronization signal block.

In a fourth aspect, a terminal device is provided, including:

a transceiver, configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

And a processor, configured to determine a frequency domain location of the synchronization signal block according to the first indication information when the first indication information is used to indicate information about a frequency domain location of the synchronization signal block.

In a fifth aspect, a network device is provided, including:

a processing unit, configured to generate first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

a transceiver unit, configured to send the first indication information to the terminal device, where the first indication information is used to indicate information about a frequency domain location of the synchronization signal block, where the terminal device is configured according to the first indication information Determine the frequency domain position of the sync signal block.

In a sixth aspect, a network device is provided, including:

a processor, configured to generate first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

a transceiver, configured to send the first indication information to the terminal device, where the first indication information is used to indicate information about a frequency domain location of a synchronization signal block, where the terminal device is configured according to the first indication information Determine the frequency domain position of the sync signal block.

In a seventh aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method embodiment of the first aspect or the second aspect described above.

In an eighth aspect, a computer chip is provided, comprising: an input interface, an output interface, at least one processor, a memory, the processor is configured to execute code in the memory, and when the code is executed, the processing The various processes performed by the terminal device in the method of determining the frequency domain position of the synchronization signal block in the first aspect and various implementations described above may be implemented.

According to a ninth aspect, a computer chip is provided, comprising: an input interface, an output interface, at least one processor, and a memory, wherein the processor is configured to execute code in the memory, when the code is executed, the processing The various processes performed by the network device in the method of determining the frequency domain location of the synchronization signal block in the second aspect and various implementations described above may be implemented.

In a tenth aspect, there is provided a communication system comprising the network device as described above, and the terminal device described above.

DRAWINGS

FIG. 1 is an example of an application scenario of the present invention.

2 is a schematic block diagram of an SS block according to an embodiment of the present invention.

FIG. 3 is a schematic flowchart of a method for determining a position of a synchronization signal block according to an embodiment of the present invention.

4 is a schematic block diagram of a terminal device according to an embodiment of the present invention.

FIG. 5 is a schematic block diagram of another terminal device according to an embodiment of the present invention.

FIG. 6 is a schematic block diagram of a network device according to an embodiment of the present invention.

FIG. 7 is a schematic block diagram of another network device according to an embodiment of the present invention.

Detailed ways

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various scenarios including a 5G communication system. For example, a hybrid deployment scenario composed of a 5G communication system and a first communication system, and the like. The first communication system can be any communication system. For example: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), and the like. For ease of understanding, the embodiment of the present invention is exemplified only by the 5G communication system, but the embodiment of the present invention is not limited thereto.

Moreover, the present invention describes various embodiments in connection with network devices and terminal devices.

The network device may refer to any entity on the network side that is used to send or receive signals. For example, a base station device or the like in a 5G network.

The terminal device can be any terminal device. Specifically, the terminal device can communicate with one or more core networks (Core Network) via a Radio Access Network (RAN), and can also be referred to as an access terminal, a user equipment (User Equipment, UE), and a user. Unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. For example, it can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless communication function. Handheld device, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, and the like.

FIG. 1 is a schematic diagram of a 5G application scenario according to an embodiment of the present invention.

As shown in FIG. 1, the communication system 100 can include a network device 110, a terminal device 120, and a terminal device 130. The network device 110 can communicate with the terminal device 120 and the terminal device 130 through air interfaces, respectively. Multi-service transmission is supported between the network device 110 and the terminal device (the terminal device 120 and the terminal device 130).

In the communication system 100 shown in FIG. 1, since the frequency band used is high, the path loss of the wireless signal transmission becomes large, and the coverage of the wireless signal becomes small. At this time, through the multi-antenna system of the network device 110, a beamforming technique is used to form a beam to increase the gain of the wireless signal to compensate for the path loss. However, the beam has directivity, and a narrow beam can only cover part of the cell and cannot cover all users in the cell.

For example, as shown in FIG. 1, the network device 110 can transmit signals through four different directions of beams (B1/B2/B3/B4). For the beam B2, only the terminal device 120 can be covered, and the terminal device 130 cannot be covered.

Therefore, the synchronization signal (SS) and the physical broadcast channel (PBCH) involved in the communication system 100 need to cover the entire cell by means of multi-beam scanning, which facilitates reception of terminal devices in the cell. The multi-beam transmission of the synchronization signal (SS) is implemented by defining an SS burst set. An SS burst set contains one or more SS bursts, and an SS burst contains one or more SS blocks. An SS block is used to carry the synchronization signal and broadcast channel of one beam.

Specifically, as shown in FIG. 2, a SS block includes a symbol of a Primary Synchronization Signal (PSS), a symbol of a Secondary Synchronization Signal (SSS), and a new air interface of two symbols-physical New Radio Access Technology-Physical Broadcast Channel (NR-PBCH). Therefore, one SS Burst Set may contain synchronization signals of SS block beams in a cell.

It should be understood that, in the embodiment of the present application, the period of the SS burst set is configurable, and the SS burst set bearer sent in one period is sent in a time window of 5 ms. For example, taking a 15 kHz subcarrier spacing as an example, a slot contains 14 symbols and can carry two SS blocks. It should also be understood that in addition to the above-mentioned synchronization signals and PBCHs that require multi-beam scanning, other common information, such as Remaining System Information (RMSI), paging, also requires multi-beam scanning. send.

In actual operation, when a user equipment (User Equipment, UE) needs to access the network, it needs to obtain a system message from the network.

Specifically, part of the system message is carried over the NR-PBCH, and another part of the system message is carried over the NR-PDSCH. The system message carried by the NR-PDSCH includes Remaining minimum system information (RMSI). Downlink Control Information (DCI) corresponding to the NR-PDSCH is carried on the NR-PDCCH, and the time-frequency resource location where the NR-PDCCH is located is indicated by the CORESET information carried by the NR-PBCH.

At the same time, the NR-PBCH also carries the RMSI presence flag information, which is used to indicate whether the SS block is associated with the RMSI information. The RMSI presence flag information indicates that there is no RMSI through the reserved value in the PRB grid offset information field. When the PRB grid offset information field indicates that there is no RMSI, the network device can use some existing bits to indicate the frequency domain location information of the terminal device synchronization signal block.

For ease of understanding, the PRB grid offset information is described below:

For frequency resources within the bandwidth, the division in RB includes 12 subcarriers in each RB. However, the RB partitioning and the data channel RB partitioning for the SS block may be misaligned, that is, the starting subcarriers of one RB are inconsistent, but there is an offset. At this time, the PRB grid offset information in the PBCH needs to be used to indicate the deviation between the RBs. Currently, the resource elements (Resource Element, RE) of the 0-11 SS blocks that are offset by the offset between the RBs can be indicated by 4 bits. Among them, one subcarrier on the frequency is a symbol on the time domain, which is called an RE.

Specifically, since the PRB grid offset information field includes 4 bits, it is used to indicate an offset between the physical resource block PRB grid between the synchronization signal block and the channel or signal of the asynchronous signal block, and the offset includes 0-11 subcarriers.

Therefore, the PRB grid offset information field also includes four reserved values, which can be used to indicate that there is no RMSI.

Further, in addition, in the communication system 100 shown in FIG. 1, for the initially accessed UE, it is necessary to define a common search space for receiving the common control information.

For example, Remaining System Information (RMSI).

Therefore, the concept of a Control Resource Set (CORESET) is introduced in the embodiment of the present application, which is used to define a resource set carrying control information, and the UE detects a new air interface-physical downlink control channel in the resource set (New Radio-Physical Downlink Control Channel (NR-PDCCH), to obtain scheduling information of a New Radio-Physical Downlink Shared Channel (NR-PDSCH) carrying RMSI. The indication information of CORESET is carried in the NR-PBCH for the UE to receive the RMSI. Specifically, the configuration information of the CORESET mainly includes the following information: a frequency domain resource, an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and a time length.

Further, the CORESET information of the RMSI can be indicated by 8 bits.

It can be found that when the PRB grid offset information field indicates that there is no RMSI, the CORESET information field can be used to indicate frequency domain location information of the synchronization signal block, thereby facilitating the UE to reduce blind detection according to the frequency domain location information of the synchronization signal block. Thereby, the PBCH in the sync signal block is detected to obtain the CORESET information of the RMSI, and the RMSI is received.

In the following, in the embodiment of the present application, a method for determining, by a terminal device, a frequency domain location in which a synchronization signal is fast is described:

In the embodiment of the present application, for the wireless spectrum in the NR, the frequency domain position of the synchronization signal block may be defined by a synchronization raster.

Table 1 Relationship between the frequency domain position of SS Block and GSCN in the frequency range

Among them, GSCN represents the Global Synchronization Channel Number.

Specifically, as shown in Table 1, the possible frequency domain positions of the sync signal block are determined by the formulas in the table in different frequency ranges. More specifically, the number is numbered by SSREF and determined based on the SSREF number. Where SSREF represents the frequency domain position of the sync signal block.

Further, after the synchronization raster is determined, the resource mapping of the synchronization signal block can be further determined according to the following table.

Table 2 Mapping between synchronous grid and resource elements of sync block

资源元素索引kResource element index k	00
SS block的物理资源块的编号n _PRB Number of the physical resource block of the SS block n _PRB	n _PRB＝10 n _PRB = 10

It can be seen from Table 2 that the synchronous raster is located in the RE of the number 0 of the PRB with the PRB number of 10 in the 20 physical resource blocks (PRBs) of the synchronization signal block.

In addition, it should be noted that for synchronous rasters, the distribution of synchronous rasters within the band is different under different bands.

Table 3 applies to GSCN corresponding to each frequency band

The SS Block SCS is a subcarrier spacing (SCS) of the SS Block. GSCN stands for Global Synchronization Channel Number.

Table 3 shows the distribution of synchronous rasters in different bands. For example, for band n77, the synchronous raster has a number range of 9460–10079, for a total of 620 synchronous rasters.

It can be seen from the above analysis that the reserved value in the PRB grid offset information field indicates that when there is no RMSI, the resource information of the second SS block relative to the first SS block may be indicated by a bit in the CORESET information field of the RMSI. Since the CORESET information field contains 8 bits, the position of 256 synchronous rasters can be indicated by indicating the offset of the target synchronization raster and the synchronization raster corresponding to the current synchronization signal block. It is also possible to indicate that there is no RMSI through the reserved value in the PRB grid offset information field, and indicate that the second SS block is relative to the first SS block by the reserved value in the PRB grid offset information field and the bit combination in the CORESET information field of the RMSI. Resource information.

Table 4 Offset of the sync grid of band n78

Specifically, as shown in Table 4, R0, R1, and R2 are reserved values in the PRB grid offset information field, and can be used to indicate that there is no RMSI. The CORESET information field of the RMSI shares 8 bits, which can represent 0-255. The two pieces of information are used to jointly indicate the frequency domain location information of the second SS block, and the frequency domain location information indicates the synchronous raster where the second SS block is located. The number of sync rasters offset from the position of the sync raster where the first SS block is located. It should be understood that Table 4 is only exemplified by taking the band n78 as an example, and the embodiment of the present application is not limited thereto. For example, the range of synchronous rasters that band n78 needs to indicate includes -342, -341, ..., -1, 1, ..., 341, 342. However, for other bands, the scope of the synchronous raster is not limited to this.

It can be found that the physical resource block (PRB) grid offset (grid offset) reserved value in the information domain, and the remaining system information (Remaining System Information, RMSI) control resource set (Control Resource Set, CORESET) The method of 8 bits in the information field jointly indicating the frequency domain position of the sync signal block can only indicate the position of 1024 sync rasters.

Therefore, in the embodiment of the present application, a method for determining a frequency domain position of a synchronization signal block is provided. By multiplexing the first indication information to indicate a frequency domain position of the synchronization signal block, the synchronization signal determined by the terminal device can be effectively improved. The accuracy of the block's frequency domain location.

FIG. 3 is a schematic flowchart of a method for determining a frequency domain position of a synchronization signal block according to an embodiment of the present invention.

Specifically, as shown in FIG. 3, the method includes:

210. The network device generates first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block.

220. The network device sends the first indication information to the terminal device.

230. When the first indication information is used to indicate information about a frequency domain location of the synchronization signal block, the terminal device determines a frequency domain location of the synchronization signal block according to the first indication information.

It should be understood that the subcarrier spacing includes a subcarrier spacing of the physical downlink shared channel PDSCH carrying at least one of the following information:

Further, the first indication information includes 1 bit. Optionally, before the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information, the terminal device determines whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

The following describes the implementation manner of determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block:

In an embodiment, the terminal device receives the second indication information sent by the network device, where the second indication information is used to indicate the physical resource, before the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information. a reserved value in the block PRB grid offset information field, the reserved value in the PRB grid offset information field, used to indicate that there is no remaining system information RMSI in the downlink transmission of the terminal device; thus, the terminal device is configured according to The second indication information determines that the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Further, the reserved value in the PRB grid offset information field is also used to indicate the frequency domain location of the sync signal block.

Further, the second indication information includes 4 of the reserved values.

In other words, before the network device generates the first indication information, it is determined whether the first indication information is used to indicate a frequency domain location of the synchronization signal block. Specifically, when the network device determines that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In addition, the network device determines that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, and generates second indication information, where the second indication information is used to indicate a reserved value in the PRB grid offset information field of the physical resource block. The reserved value in the PRB grid offset information field is used to indicate that there is no remaining system information RMSI in the downlink transmission of the terminal device; the network device sends the second indication information to the terminal device.

In another embodiment, the terminal device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block. Similarly, the network device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

In another embodiment, the terminal device determines, according to the number of synchronization grids in the frequency band in which the first indication information is sent by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block. . Similarly, the network device determines whether the first indication information is used to indicate a frequency domain position of the synchronization signal block, based on the number of synchronization grids existing in the frequency band in which the terminal device transmits the first indication information.

For example, when the terminal device determines that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block. Further, the preset threshold may be 512.

It should be understood that, in the embodiment of the present application, the foregoing embodiment is only an implementation manner for determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, which is not specifically limited in this embodiment.

For example, the terminal device may determine whether the first indication information is used to indicate the synchronization signal by combining the second indication information related to the foregoing and the frequency band in which the first indication information is sent or the number of synchronization grids existing in the frequency band. The frequency domain location of the block.

It should be understood that, in the embodiment of the present application, the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information, but the embodiment of the present application is not limited thereto.

For example, the terminal device may further determine the frequency domain location of the synchronization signal block in combination with the second indication information involved above.

The third indication information is introduced below for exemplary explanation:

In an embodiment, the terminal device receives the third indication information sent by the network device, where the third indication information is used to indicate the control resource, before the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information. The aggregated information, or the third indication information is used to indicate the frequency domain location of the synchronization signal block.

Further, the terminal device determines, according to the first indication information, the frequency domain location of the synchronization signal block, the terminal device determines, according to the second indication information, the third indication information, used to indicate a frequency domain location of the synchronization signal block. .

Further, the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and/or the third indication information.

For example, the terminal device determines a frequency domain location of the synchronization signal block according to the first indication information.

For another example, the terminal device determines a frequency domain location of the synchronization signal block according to the first indication information and the second indication information.

For another example, the terminal device determines a frequency domain location of the synchronization signal block according to the first indication information and the third indication information.

For another example, the terminal device determines a frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and the third indication information.

Further, the third indication information includes 8 bits.

In other words, before the network device sends the third indication information to the terminal device, determining that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the third indication information is used to indicate the frequency domain of the synchronization signal block. position.

It should be understood that the third indication information involved in the foregoing is only an exemplary description of the embodiment of the present application. The embodiment of the present application is not limited thereto. For example, the network device may also indicate the frequency domain location of the synchronization signal block by multiplexing other bits. .

As shown in FIG. 4, the terminal device 300 includes:

The transceiver unit 310 is configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block.

The processing unit 320 is configured to determine, according to the first indication information, a frequency domain position of the synchronization signal block, when the first indication information is used to indicate information about a frequency domain position of the synchronization signal block.

Optionally, the processing unit 320 is further configured to:

The processing unit 320 determines, according to the first indication information, whether the first indication information is used to indicate a frequency domain position of the synchronization signal block before determining a frequency domain position of the synchronization signal block.

Optionally, the transceiver unit 310 is further configured to:

The processing unit 320 receives the second indication information sent by the network device, where the second indication information is used to indicate the physical resource block PRB grid offset information field, before determining the frequency domain location of the synchronization signal block according to the first indication information. The reserved value in the PRB grid offset information field is used to indicate that there is no remaining system information RMSI in the downlink transmission of the terminal device;

The processing unit 320 is specifically configured to:

Determining, according to the second indication information, the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain location of the sync signal block.

Optionally, the second indication information includes four of the reserved values.

Optionally, the processing unit 320 is specifically configured to:

And determining, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the processing unit 320 is specifically configured to:

And determining, according to the number of synchronization grids in the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain position of the synchronization signal block.

Optionally, the processing unit 320 is more specifically configured to:

When it is determined that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the preset threshold is 512.

Optionally, the subcarrier spacing includes a subcarrier spacing of a physical downlink shared channel PDSCH carrying at least one of the following information:

Optionally, the first indication information includes 1 bit.

Optionally, the transceiver unit 310 is further configured to:

The processing unit 320 receives, according to the first indication information, a third indication information that is sent by the network device, where the third indication information is used to indicate the information of the control resource set, or the first The three indication information is used to indicate the frequency domain position of the synchronization signal block.

Optionally, the processing unit 320 is further configured to:

Determining, according to the second indication information, the third indication information is used to indicate a frequency domain location of the synchronization signal block, according to the first indication information, before determining a frequency domain location of the synchronization signal block.

Optionally, the processing unit 320 is more specifically configured to:

The terminal device determines the frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and/or the third indication information.

Optionally, the third indication information includes 8 bits.

In the embodiment of the present invention, the transceiver unit 310 can be implemented by a transceiver, and the processing unit 320 can be implemented by a processor. As shown in FIG. 5, the terminal device 400 may include a processor 410, a transceiver 420, and a memory 430. The memory 430 can be used to store indication information, and can also be used to store code, instructions, and the like executed by the processor 410. The various components in the terminal device 400 are connected by a bus system, wherein the bus system includes a power bus, a control bus, and a status signal bus in addition to the data bus.

The terminal device 400 shown in FIG. 5 can implement the various processes implemented by the terminal device in the foregoing method embodiment of FIG. 3. To avoid repetition, details are not described herein again.

The processing unit 510 is configured to generate first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

The transceiver unit 520 is configured to send the first indication information to the terminal device, so that when the first indication information is used to indicate the information of the frequency domain location of the synchronization signal block, the terminal device determines the synchronization signal according to the first indication information. The frequency domain location of the block.

Optionally, the processing unit 510 is further configured to:

Before generating the first indication information, determining whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the processing unit 510 is more specifically configured to:

When it is determined that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the first indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the processing unit 510 is more specifically configured to:

Optionally, the preset threshold is 512.

Optionally, the processing unit 510 is specifically configured to:

When the remaining system information RMSI is not present in the downlink transmission of the terminal device, the second indication information is generated, where the second indication information is used to indicate a reserved value in the PRB grid offset information field of the physical resource block, and the PRB grid is biased. The reserved value in the mobile information field is used to indicate that the remaining system information RMSI does not exist in the downlink transmission of the terminal device; the transceiver unit 520 is further configured to send the second indication information to the terminal device.

Optionally, the first indication information includes 1 bit.

Optionally, the transceiver unit 520 is further configured to:

The third indication information is sent to the terminal device, where the third indication information is used to indicate information of the control resource set, or the third indication information is used to indicate a frequency domain location of the synchronization signal block.

Optionally, the processing unit 510 is further configured to:

Before the sending and receiving unit 520 sends the third indication information to the terminal device, determining that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the third indication information is used to indicate the frequency domain location of the synchronization signal block.

Optionally, the third indication information includes 8 bits.

In the embodiment of the present invention, the processing unit 510 can be implemented by a transceiver, and the transceiver unit 520 can be implemented by a processor. As shown in FIG. 7, network device 600 can include a processor 610, a transceiver 620, and a memory 630. The memory 630 can be used to store indication information, and can also be used to store code, instructions, and the like executed by the processor 610. The various components in the network device 600 are connected by a bus system, wherein the bus system includes a power bus, a control bus, and a status signal bus in addition to the data bus.

The network device 600 shown in FIG. 7 can implement the various processes implemented by the network device in the foregoing method embodiment of FIG. 3. To avoid repetition, details are not described herein again.

That is, the method embodiment in the embodiment of the present invention may be implemented by a processor and a transceiver.

In the implementation process, each step of the method embodiment in the embodiment of the present invention may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. More specifically, the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should be understood that the processor mentioned in the embodiment of the present invention may be an integrated circuit chip, which has signal processing capability, and may implement or execute the disclosed methods, steps, and logic blocks in the embodiments of the present invention. For example, the above processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or Other programmable logic devices, transistor logic devices, discrete hardware components, and the like. Further, the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Furthermore, the memory referred to in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. The memory in the embodiment of the present invention may also be a static random access memory (SRAM), a dynamic random access memory (DRAM), or a dynamic random access memory (DRAM). Synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR), enhanced synchronous dynamic random access memory (ESDRAM), synchronous connection Synchro link DRAM (SLDRAM) and direct memory bus (DR RAM) and so on. That is, the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

In the end, it is to be understood that the terminology of the embodiments of the invention and the claims

For example, the singular forms "a", "the", "the" and "the" meaning.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the embodiments of the invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

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

If implemented in the form of a software functional unit and sold or used as a standalone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the embodiments of the present invention, but the scope of protection of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily think of the technical scope disclosed in the embodiments of the present invention. Variations or substitutions are intended to be included within the scope of the embodiments of the invention. Therefore, the scope of protection of the embodiments of the present invention should be determined by the scope of protection of the claims.

Claims

A method for determining a position of a sync signal block, comprising:

Receiving, by the terminal device, first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

When the first indication information is used to indicate the information of the frequency domain location of the synchronization signal block, the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information.
The method according to claim 1, wherein the method further comprises: before the determining, by the terminal device, the frequency domain location of the synchronization signal block according to the first indication information, the method further comprises:

The terminal device determines whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 2, wherein the method further comprises: before the determining, by the terminal device, the frequency domain location of the synchronization signal block according to the first indication information, the method further comprises:

Receiving, by the terminal device, second indication information that is sent by the network device, where the second indication information is used to indicate a reserved value in a physical resource block PRB grid offset information field, where the PRB grid offset information field The reserved value is used to indicate that the remaining system information RMSI does not exist in the downlink transmission of the terminal device;

The determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, includes:

The terminal device determines, according to the second indication information, that the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 3, wherein the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain position of the sync signal block.
The method according to claim 3 or 4, wherein the second indication information comprises 4 of the reserved values.
The method according to any one of claims 2 to 5, wherein the determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block comprises:

The terminal device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to any one of claims 2 to 5, wherein the determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block comprises:

And determining, by the terminal device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, based on the number of synchronization grids in the frequency band in which the terminal device sends the first indication information.
The method according to claim 7, wherein the terminal device determines whether the first indication information is based on the number of synchronization grids present in the frequency band in which the first indication information is located Used to indicate the frequency domain location of the sync block, including:

When the terminal device determines that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method of claim 8 wherein said predetermined threshold is 512.
The method according to any one of claims 1 to 9, wherein the subcarrier spacing comprises a subcarrier spacing of a physical downlink shared channel PDSCH carrying at least one of the following information:

The remaining system information RMSI, the message 2/4 in the random access procedure, and other system information OSI are carried.
The method according to any one of claims 1 to 10, wherein the first indication information comprises 1 bit.
The method according to any one of claims 1 to 11, wherein the method further comprises: before the determining, by the terminal device, the frequency domain location of the synchronization signal block according to the first indication information, the method further comprises:

Receiving, by the terminal device, third indication information that is sent by the network device, where the third indication information is used to indicate information of a control resource set, or the third indication information is used to indicate a frequency domain of the synchronization signal block position.
The method according to claim 12, wherein the method further comprises: before the determining, by the terminal device, the frequency domain location of the synchronization signal block according to the first indication information, the method further comprises:

The terminal device determines, according to the second indication information, that the third indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 13, wherein the terminal device determines the frequency domain location of the synchronization signal block according to the first indication information, including:

The terminal device determines a frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and/or the third indication information.
The method according to claim 13 or 14, wherein said third indication information comprises 8 bits.
A method for determining a position of a sync signal block, comprising:

The network device generates first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

When the network device sends the first indication information to the terminal device, so that the first indication information is used to indicate the information of the frequency domain location of the synchronization signal block, the terminal device is configured according to the first indication information, Determine the frequency domain position of the sync signal block.
The method according to claim 16, wherein before the generating, by the network device, the first indication information, the method further comprises:

The network device determines whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 17, wherein the determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block comprises:

When the network device determines that there is no remaining system information RMSI in the downlink transmission of the terminal device, determining that the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 17 or 18, wherein the determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block comprises:

The network device determines, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 17 or 18, wherein the determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block comprises:

And determining, by the network device, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block, based on the number of synchronization grids in the frequency band in which the terminal device sends the first indication information.
The method according to claim 20, wherein the network device determines whether the first indication information is based on the number of synchronization grids existing in a frequency band in which the terminal information is sent by the terminal device Used to indicate the frequency domain location of the sync block, including:

When the network device determines that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The method of claim 21 wherein said predetermined threshold is 512.
The method according to any one of claims 16 to 22, further comprising:

When the network device determines that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, generates second indication information, where the second indication information is used to indicate a reserved value in a physical resource block PRB grid offset information field. The reserved value in the PRB grid offset information field is used to indicate that the remaining system information RMSI does not exist in the downlink transmission of the terminal device;

The network device sends the second indication information to the terminal device.
The method according to claim 23, wherein the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain position of the sync signal block.
The method according to claim 23 or 24, wherein the second indication information comprises 4 of the reserved values.
The method according to any one of claims 16 to 25, wherein the subcarrier spacing comprises a subcarrier spacing of a physical downlink shared channel PDSCH carrying at least one of the following information:

The remaining system information RMSI, the message 2/4 in the random access procedure, and other system information OSI are carried.
The method according to any one of claims 16 to 26, wherein the first indication information comprises 1 bit.
The method according to any one of claims 16 to 27, further comprising:

The network device sends third indication information to the terminal device, where the third indication information is used to indicate information of a control resource set, or the third indication information is used to indicate a frequency domain location of the synchronization signal block. .
The method according to claim 28, wherein before the sending, by the network device, the third indication information to the terminal device, the method further includes:

When the network device determines that there is no remaining system information RMSI in the downlink transmission of the terminal device, determining that the third indication information is used to indicate a frequency domain location of the synchronization signal block.
The method according to claim 28 or 29, wherein said third indication information comprises 8 bits.
A terminal device, comprising:

a transceiver unit, configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

And a processing unit, configured to determine, according to the first indication information, a frequency domain location of the synchronization signal block, when the first indication information is used to indicate information about a frequency domain location of the synchronization signal block.
The terminal device according to claim 31, wherein the processing unit is further configured to:

The processing unit determines whether the first indication information is used to indicate a frequency domain position of the synchronization signal block before determining a frequency domain position of the synchronization signal block according to the first indication information.
The terminal device according to claim 32, wherein the transceiver unit is further configured to:

And the processing unit receives, according to the first indication information, the second indication information that is sent by the network device, where the second indication information is used to indicate that the physical resource block PRB grid is biased before determining the frequency domain location of the synchronization signal block. a reserved value in the information field, the reserved value in the PRB grid offset information field, used to indicate that there is no remaining system information RMSI in the downlink transmission of the terminal device;

The processing unit is specifically configured to:

Determining, according to the second indication information, that the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The terminal device according to claim 33, wherein the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain position of the synchronization signal block.
The terminal device according to claim 33 or 34, wherein the second indication information comprises four of the reserved values.
The terminal device according to any one of claims 32 to 35, wherein the processing unit is specifically configured to:

And determining, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The terminal device according to any one of claims 32 to 35, wherein the processing unit is specifically configured to:

And determining, according to the number of synchronization grids in the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The terminal device according to claim 37, wherein the processing unit is more specifically configured to:

When it is determined that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The terminal device according to claim 38, wherein the preset threshold is 512.
The terminal device according to any one of claims 31 to 39, wherein the subcarrier spacing comprises a subcarrier spacing of a physical downlink shared channel PDSCH carrying at least one of the following information:

The remaining system information RMSI, the message 2/4 in the random access procedure, and other system information OSI are carried.
The terminal device according to any one of claims 31 to 40, wherein the first indication information comprises 1 bit.
The terminal device according to any one of claims 31 to 41, wherein the transceiver unit is further configured to:

Receiving, by the processing unit, the third indication information sent by the network device, where the third indication information is used to indicate the information of the control resource set, or The third indication information is used to indicate a frequency domain location of the synchronization signal block.
The terminal device according to claim 42, wherein the processing unit is further configured to:

And determining, according to the second indication information, the third indication information, used to indicate a frequency domain location of the synchronization signal block, according to the first indication information, before determining a frequency domain location of the synchronization signal block.
The terminal device according to claim 43, wherein the processing unit is more specifically configured to:

The terminal device determines a frequency domain location of the synchronization signal block according to the first indication information, the second indication information, and/or the third indication information.
The terminal device according to claim 43 or 44, wherein the third indication information comprises 8 bits.
A network device, comprising:

a processing unit, configured to generate first indication information, where the first indication information is used to indicate a subcarrier spacing SCS, or the first indication information is used to indicate information about a frequency domain location of the synchronization signal block;

a transceiver unit, configured to send the first indication information to the terminal device, where the first indication information is used to indicate information about a frequency domain location of the synchronization signal block, where the terminal device is configured according to the first indication information Determine the frequency domain position of the sync signal block.
The network device according to claim 46, wherein the processing unit is further configured to:

Before generating the first indication information, determining whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 47, wherein the processing unit is more specifically configured to:

When it is determined that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 47 or 48, wherein the processing unit is more specifically configured to:

And determining, according to the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 47 or 48, wherein the processing unit is more specifically configured to:

And determining, according to the number of synchronization grids in the frequency band in which the terminal device sends the first indication information, whether the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 50, wherein the processing unit is more specifically configured to:

When it is determined that the number of the synchronization grids is greater than a preset threshold, the first indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 51, wherein the preset threshold is 512.
The network device according to any one of claims 46 to 52, wherein the processing unit is specifically configured to:

When the remaining system information RMSI is not present in the downlink transmission of the terminal device, the second indication information is generated, where the second indication information is used to indicate a reserved value in the physical resource block PRB grid offset information field, where the PRB a reserved value in the grid offset information field, used to indicate that there is no remaining system information RMSI in the downlink transmission of the terminal device;

The transceiver unit is further configured to send the second indication information to the terminal device.
The network device according to claim 53, wherein the reserved value in the PRB trellis offset information field is further used to indicate a frequency domain position of the synchronization signal block.
The network device according to claim 53 or 54, wherein said second indication information comprises four said reserved values.
The network device according to any one of claims 46 to 55, wherein the subcarrier spacing comprises a subcarrier spacing of a physical downlink shared channel PDSCH carrying at least one of the following information:

The remaining system information RMSI, the message 2/4 in the random access procedure, and other system information OSI are carried.
The network device according to any one of claims 46 to 56, wherein the first indication information comprises 1 bit.
The network device according to any one of claims 46 to 57, wherein the transceiver unit is further configured to:

Sending third indication information to the terminal device, where the third indication information is used to indicate information of a control resource set, or the third indication information is used to indicate a frequency domain location of the synchronization signal block.
The network device according to claim 58, wherein the processing unit is further configured to:

Before the sending and receiving unit sends the third indication information to the terminal device, determining that the remaining system information RMSI does not exist in the downlink transmission of the terminal device, determining that the third indication information is used to indicate the frequency of the synchronization signal block Domain location.
The network device according to claim 58 or 59, wherein said third indication information comprises 8 bits.