CN110351835B

CN110351835B - Frequency band determination method and device

Info

Publication number: CN110351835B
Application number: CN201810293990.0A
Authority: CN
Inventors: 刘思綦; 纪子超; 周帅; 吴凯; 冯三军
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-04-03
Filing date: 2018-04-03
Publication date: 2021-09-07
Anticipated expiration: 2038-04-03
Also published as: CN110351835A

Abstract

The embodiment of the application provides a frequency band determining method and device, relates to the technical field of communication, and is used for solving the problem that a terminal device cannot determine a frequency band to which a received SSB belongs. The method comprises the following steps: transmitting the SSB of the first frequency band on at least one first synchronization grid in the target frequency range; the target frequency range is a frequency range overlapping with a frequency range of a second frequency band in the frequency range of the first frequency band, and a frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency band is greater than or equal to a frequency deviation threshold. The method and the device are used for determining the frequency band.

Description

Frequency band determination method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a frequency band determination method and apparatus.

Background

In order to reasonably use spectrum resources and ensure that services do not interfere with each other when using spectrum resources, in the prior art, frequency bands (bands) used by a communication system are divided.

In the existing frequency division method, there may be overlapping of frequency ranges of different frequency bands. For two or more frequency bands with overlapping frequency ranges, if the frequency interval of a Synchronization raster (Synchronization raster) at the overlapping part of the frequency domain is smaller than an initial frequency offset error (initial frequency error), it may cause that when a terminal device receives a Synchronization information Block (SSB) transmitted through the Synchronization raster, it may not be able to distinguish which frequency band the received SSB belongs to, and further cause that the terminal device may not determine the current frequency band. For two overlapped frequency bands, even if the subcarrier spacing (SCS) of the SSB is the same, their Minimum Channel bandwidths may be different, and the corresponding Remaining Minimum System Information (RMSI) Control Resource Set (core) configurations may also be different, or it may be said that the slot symbols and Resource block groups (Set of Resource blocks and slot blocks of Control Resource Set for Type 0-search space) of the Control Resource group of the corresponding Type0-PDCCH search space are different, if the terminal device cannot determine which frequency band the received SSB belongs to, the terminal device may fail to determine the correct RMSI core configuration (or cannot determine the slot symbols and Resource block groups of the Control Resource group of the correct PDCCH Type 3652-PDCCH search space), at this time, the terminal device needs to perform Channel configuration on the basis of different RMSIs (assuming that multiple Downlink attempts, physical downlink control channel) can access the cell, which greatly increases the time delay and power consumption of the terminal device in cell access.

Disclosure of Invention

The embodiment of the application provides a frequency band determination method and a frequency band determination device, which are used for solving the problem that a terminal device cannot determine a frequency band to which a received SSB belongs and further cannot determine the current frequency band.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a frequency band determining method, which is applied to an access network device, and the method includes:

transmitting the SSB of the first frequency band on at least one first synchronization grid in the target frequency range;

the target frequency range is a frequency range overlapping with a frequency range of a second frequency band in the frequency range of the first frequency band, and a frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency band is greater than or equal to a frequency deviation threshold.

In the frequency band determining method provided in the first aspect, the access network device sends the SSB of the first frequency band on at least one first synchronization grid in the target frequency range; because the frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency bands is greater than or equal to the frequency deviation threshold, after the terminal device receives the SSB sent by the access network device, the frequency band to which the synchronization grid sent by the access network device belongs can be determined, the frequency band to which the SSB belongs can be further determined, and the current frequency band can be further determined.

In a second aspect, an embodiment of the present application provides a frequency band determining method, including:

the access network equipment at least sends a first SSB of a first frequency band in a target frequency range;

the target frequency range is a frequency range overlapping with a frequency range of a second frequency band in the frequency range of the first frequency band, and the first SSB includes indication information, where the indication information is used to indicate that the frequency band to which the first SSB belongs is the first frequency band.

In a third aspect, an embodiment of the present application provides a frequency band determining method, which is applied to a terminal device, and the method includes:

receiving an SSB sent by access network equipment, wherein the SSB comprises indication information, and the indication information is used for indicating a frequency band to which the SSB belongs;

and determining the frequency band to which the SSB belongs according to the indication information.

In the frequency band determination methods provided in the second aspect and the third aspect, because the first SSB of the first frequency band sent by the access network device includes the indication information, and the indication information is used to indicate that the frequency band to which the first SSB belongs is the first frequency band, after the terminal device receives the first SSB sent by the access network device, the terminal device may determine that the frequency band to which the first SSB belongs is the first frequency band according to the indication information, and then determine that the current frequency band is the first frequency band, so that the problem that the terminal device cannot determine the current frequency band can be solved in the embodiments of the present application.

In a fourth aspect, an embodiment of the present application provides a frequency band determining method, where the method includes:

the access network equipment loads a first SSB of a first frequency band on a first position in a frame to be sent;

the first location is different from a second location of a second SSB carrying the second frequency band in a frame, a frequency range of the first frequency band and a frequency range of the second frequency band have an intersection, and a period of the first SSB and a period of the second SSB are both greater than 5 milliseconds.

In a fifth aspect, an embodiment of the present application provides a frequency band determining method, which is applied to a terminal device, and the method includes:

receiving an SSB sent by network access equipment;

determining the frequency band to which the SSB belongs according to the position of the SSB in a frame;

wherein a first location of a first SSB in a frame carrying the first frequency band is different from a second location of a second SSB in a frame carrying the second frequency band, a frequency range of the first frequency band and a frequency range of the second frequency band have an intersection, and a period of each of the first SSB and the second SSB is greater than 5 milliseconds.

In the frequency band determining methods provided in the fourth aspect and the fifth aspect, because the access network device carries the first SSB in the first frequency band at the first position in the frame for transmission, and carries the second SSB in the second frequency band at the second position in the frame for transmission, where the first position is different from the second position, after receiving the SSB transmitted by the network access device, the terminal device can determine the frequency band to which the SSB belongs according to the position of the SSB in the frame, and further determine the current frequency band, and thus the embodiment of the present application can solve the problem that the terminal device cannot determine the current frequency band.

In a sixth aspect, an embodiment of the present application provides a frequency band determining method, where the method includes:

the access network equipment prohibits sending the SSB of the first frequency band on the first synchronization grid under the condition that the frequency interval between the first synchronization grid and the second synchronization grid is determined to be smaller than a frequency deviation threshold value;

the first synchronization grid belongs to the synchronization grid of the first frequency band, and the second synchronization grid belongs to the synchronization grids of any other frequency bands except the first frequency band.

In the frequency band determining method provided in the sixth aspect, the access network device prohibits sending the SSB of the first frequency band on the first synchronization grid when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold, that is, when the frequency interval between the two synchronization grids is smaller than the frequency deviation threshold, the SSB is sent only on one synchronization grid or the SSB is not sent on both synchronization grids, so that when receiving the SSB sent on the synchronization grid, the terminal device can avoid the problem that the terminal device cannot determine the synchronization grid sending the SSB because the frequency deviation error between two or more synchronization grids possibly sending the SSB is smaller than the initial frequency deviation error, and thus the terminal device can determine the current frequency band when receiving the SSB.

In a seventh aspect, an embodiment of the present application provides an access network device, including:

a transmitting unit, configured to transmit the SSB of the first frequency band on at least one first synchronization grid in the target frequency range;

In an eighth aspect, an embodiment of the present application provides an access network device, including:

a transmitting unit, configured to transmit a first SSB of a first frequency band at least in a target frequency range;

In a ninth aspect, an embodiment of the present application provides a terminal device, including:

a receiving unit, configured to receive an SSB sent by an access network device, where the SSB includes indication information, and the indication information is used to indicate a frequency band to which the SSB belongs;

and the processing unit is used for determining the frequency band to which the SSB belongs according to the indication information.

In a tenth aspect, an embodiment of the present application provides an access network device, including:

a sending unit, configured to send a first SSB in a first frequency band carried at a first position in a frame;

In an eleventh aspect, an embodiment of the present application provides a terminal device, including:

a receiving unit, configured to receive an SSB sent by a network access device;

the processing unit is used for determining the frequency band to which the SSB belongs according to the position of the SSB in a frame;

In a twelfth aspect, an embodiment of the present application provides an access network device, including:

a sending unit, configured to prohibit, by an access network device, sending an SSB of a first frequency band on a first synchronization grid when it is determined that a frequency interval between the first synchronization grid and a second synchronization grid is smaller than a frequency deviation threshold;

In a thirteenth aspect, an embodiment of the present application provides an access network device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the frequency band determination method according to any one of the first aspect, the second aspect, the fourth aspect, and the sixth aspect.

In a fourteenth aspect, an embodiment of the present application provides a terminal device, including a processor, a memory, and a computer program stored on the memory and operable on the processor, where the computer program, when executed by the processor, implements the steps of the frequency band determination method according to any one of the third and fifth aspects.

In a fifteenth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the frequency band determination method according to any one of the first, second, third, fourth, fifth, and sixth aspects.

Technical effects that can be achieved by the technical solutions provided in the seventh to fifteenth aspects are similar to the technical effects that can be achieved by the frequency band determining methods provided in the first to sixth aspects, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a possible structure of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a frequency band determination method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a target frequency range provided by an embodiment of the present application;

fig. 4 is a second schematic flowchart of a frequency band determination method according to an embodiment of the present application;

fig. 5 is a third schematic flowchart of a frequency band determination method according to an embodiment of the present application;

fig. 6 is a fourth schematic flowchart of a frequency band determination method according to an embodiment of the present application;

fig. 7 is a fifth flowchart illustrating a frequency band determination method according to an embodiment of the present application;

fig. 8 is one of schematic structural diagrams of an access network device according to an embodiment of the present application;

fig. 9 is a second schematic structural diagram of an access network device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 11 is a second schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 12 is a third schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

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

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division". The term "plurality" herein means two or more, unless otherwise specified.

For the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first" and "second" are used to distinguish the same items or similar items with basically the same functions or actions, and those skilled in the art can understand that the terms "first" and "second" are not limited to the quantity and execution order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion. In the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified.

For two or more frequency bands with overlapping frequency ranges, if the frequency interval of the synchronization grid at the overlapping part of the frequency domain is smaller than the resolution capability of the terminal device, it may cause that the terminal device cannot distinguish which frequency band the received SSB belongs to when receiving the SSB transmitted through the synchronization grid, and further cause that the terminal device cannot determine that the correct RMSI CORESET configuration requires multiple attempts to access the cell.

Based on the above problems, the embodiments of the present application provide four solutions:

the first one is: the access network equipment transmits the SSB of the first frequency band on at least one first synchronous grid in the target frequency range; because the frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency bands is greater than or equal to the frequency deviation threshold, after the terminal device receives the SSB sent by the access network device, the frequency band to which the synchronization grid sent by the access network device belongs can be determined, the frequency band to which the SSB belongs can be further determined, and the current frequency band can be further determined.

The second method is as follows: the first SSB of the first frequency band sent by the access network device comprises indication information, and the indication information is used for indicating that the frequency band to which the first SSB belongs is the first frequency band, so that after the terminal device receives the first SSB sent by the access network device, the terminal device can determine that the frequency band to which the first SSB belongs is the first frequency band according to the indication information, and then determine that the current frequency band is the first frequency band.

The third is: the access network equipment bears a first SSB of a first frequency band on a first position in a frame for sending, and bears a second SSB of a second frequency band on a second position in the frame for sending, wherein the first position is different from the second position, so that after receiving the SSB sent by the network access equipment, the terminal equipment can determine the frequency band to which the SSB belongs according to the position of the SSB in the frame, and further determine the current frequency band, and therefore the problem that the terminal equipment cannot determine the current frequency band can be solved.

The fourth method is as follows: the access network device prohibits sending the SSB of the first frequency band on the first synchronization grid under the condition that it is determined that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold, that is, when the frequency interval between the two synchronization grids is smaller than the frequency deviation threshold, the SSB is sent only on one synchronization grid or the SSB is not sent on neither synchronization grid, so that when the terminal device receives the SSB sent on the synchronization grid, the problem that the terminal device cannot determine the synchronization grid sending the SSB due to the fact that the error of less than the initial frequency deviation between the frequencies of the two or more synchronization grids possibly sending the SSB is possibly avoided, and therefore the terminal device can determine the current frequency band when receiving the SSB.

The technical scheme provided by the application can be applied to various communication systems, such as 2G, 3G, 4G and 5G communication systems, future evolution systems or various communication convergence systems and the like. A variety of application scenarios may be included, for example, scenarios such as Machine to Machine (M2M), D2M, macro and micro Communication, enhanced Mobile Broadband (eMBB), ultra high reliability and ultra Low Latency Communication (urrllc), and mass internet of things Communication (mtc).

Fig. 1 shows a schematic diagram of a possible structure of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system may include: access network device 11 and terminal device 12. The access network device 11 can send the SSB, and the terminal device 12 can receive the SSB sent by the access network device 11 and access the cell served by the access network device 11 according to the SSB sent by the access network device 11.

The access network device 11 may be a base station, a Transmission and Reception node (TRP), a relay station, an access Point, or the like. The Access network device 11 may be a Base Transceiver Station (BTS) in a Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA) network, may be an nb (nodeb) in a Wideband Code Division Multiple Access (WCDMA), and may be an eNB or enodeb (evolved nodeb) in LTE. The Access Network device 11 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The network side device 100 may also be a network side device in a 5G communication system or a network side device in a future evolution network.

Terminal device 12 may be a wireless terminal device, where a wireless terminal device refers to a device that provides voice and/or other traffic data connectivity to a user, a handheld device, computing device, or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, etc. with wireless communication capabilities. A Wireless terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and may be a Mobile terminal, such as a Mobile phone (or "cellular" phone) and a computer with a Mobile terminal, for example, a portable, pocket, hand-held, computer-embedded or vehicle-mounted Mobile device, which exchanges languages and/or data with the RAN, and Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like, and may also be a Mobile device, a UE terminal, an Access terminal, a Wireless Communication device, a terminal unit, a terminal Station, a Mobile Station (Mobile Station), a Mobile terminal, a Wireless Communication system, and a Wireless Communication system, A Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Station, a Remote Terminal (Remote Terminal), a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a User Agent (User Agent), a Terminal device, and the like. As an example, in the embodiment of the present application, fig. 1 illustrates that the terminal device 11 is a mobile phone.

The first embodiment,

An embodiment of the present application provides a frequency band determining method, specifically, referring to fig. 2, the method includes:

s21, the first access network device transmits the SSB of the first frequency band on at least one first synchronization grid in the target frequency range.

Still further, the frequency range diagram, shown in fig. 3, is used to explain the target frequency range in the above embodiment. As shown in fig. 3, the frequency range of the first frequency band is: the frequency range of the second frequency band is: bMHz-dMHz, the overlapping range of the frequency range of the first frequency band and the frequency range of the second frequency band is as follows: bMHz-cMhz.

With the definition of the target frequency range as above: the target frequency range is a frequency range overlapping with a frequency range of a second frequency band in the frequency range of the first frequency band, and the target frequency range is as follows: bMHz-cMhz.

For example, the target frequency Band range in the above embodiment is described below by taking the first frequency Band as a Band n38 frequency Band and the second frequency Band as a Band n41 frequency Band as an example.

Because the frequency range of each frequency band in the existing frequency band division mode can be known: the downlink working frequency Band of the Band n38 frequency Band is 2570MHz-2620MHz, the downlink working frequency Band of the Band n41 frequency Band is 2496MHz-2690MHz, and the frequency range overlapping with the frequency range of the Band n41 frequency Band in the frequency range of the Band n38 frequency Band is 2570MHz-2620MHz, so when the first frequency Band is the Band n38 frequency Band and the second frequency Band is the Band n41 frequency Band, the target frequency Band range is 2570MHz-2620 MHz.

Further, a frequency interval between any one of the first synchronization grids and any one of the second synchronization grids in the second frequency band is greater than or equal to a frequency deviation threshold, that is: for any one synchronization grid, there is no second synchronization grid with a frequency spacing less than a frequency deviation threshold.

In addition, the frequency deviation threshold in the above embodiments may vary according to the frequency deviation caused by hardware limitation, moving speed, local frequency, and the like, and the specific value of the frequency deviation threshold is not limited in the present application.

S22, the second access network device sends the SSB of the second frequency band on the second synchronization grid.

And S23, the terminal equipment receives the SSB sent by the access network equipment.

S24, the terminal device determines the frequency band to which the SSB belongs according to the frequency band to which the synchronization grid which sends the SSB belongs.

Specifically, when the transmission synchronization grid of the SSB received by the terminal device is the first synchronization grid, it may be determined that the received SSB belongs to the first frequency band, and when the transmission synchronization grid of the SSB received by the terminal device is the second synchronization grid, it may be determined that the received SSB belongs to the second frequency band.

It should be noted that, in the above-described hardware embodiment, the first access network device and the second access network device may be one access network device, or may be two mutually independent access network devices.

In the above embodiment, the access network device transmits the SSB of the first frequency band on at least one first synchronization grid in the target frequency range; because the frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency bands is greater than or equal to the frequency deviation threshold, after the terminal device receives the SSB sent by the access network device, the frequency band to which the synchronization grid sent by the access network device belongs can be determined, the frequency band to which the SSB belongs can be further determined, and the current frequency band can be further determined.

Optionally, before the step S201 that the access network device sends the SSB of the first frequency band on at least one first synchronization grid in the target frequency range, the method provided in the embodiment of the present application further includes:

determining a frequency of the at least one first synchronization grid in the target frequency range according to a preset synchronization grid offset.

Wherein the preset synchronization grid offset is greater than or equal to the frequency deviation threshold.

The preset synchronization grid offset is the synchronization grid offset of the first frequency band, or the preset synchronization grid offset is the synchronization grid offset of the target frequency range, or the preset synchronization grid offset is the synchronization grid offset of the first frequency domain range; the first frequency domain range is a frequency domain range to which the first frequency band belongs during synchronous grid design.

Specifically, in some frequency bands (for example, Band n38 frequency bands), every three synchronization grids may be referred to as a synchronization grid cluster, and in a synchronization grid cluster, a frequency domain interval between two adjacent synchronization grids is referred to as a synchronization grid offset (sync _ raster _ shift) of the frequency Band, so for a frequency Band in which a synchronization grid offset exists, a position of a synchronization grid on the frequency Band may be adjusted by adjusting a value of a frequency Band in which the synchronization grid of the frequency Band is offset.

Further, the preset synchronization grid offset in the above embodiment may be 5kHz +15 nhkhz, or 10kHz +15 nhkhz.

In addition, the preset synchronization grid offset is the synchronization grid offset of the first frequency band, or the preset synchronization grid offset is the synchronization grid offset of the target frequency range, or the preset synchronization grid offset is the synchronization grid offset of the first frequency domain range; the first frequency domain range is a frequency domain range to which the first frequency band belongs in the design of the synchronization grid, and therefore the implementation of the present application can be specifically realized by the following three specific implementation manners:

first, the preset synchronization grid offset is the synchronization grid offset of the first frequency band.

That is, the positions of all synchronization grids of the first frequency band are determined by presetting the synchronization grid offsets, thereby determining the frequency of the at least one first synchronization grid in the target frequency range.

Secondly, the preset synchronization grid deviation is the synchronization grid deviation of the target frequency range.

That is, the synchronization grid of the target frequency range is determined by presetting the synchronization grid offset, so that the frequency of the at least one first synchronization grid is determined in the target frequency range, and the synchronization grid may be determined by using other synchronization grid offsets corresponding to other frequency ranges outside the target frequency range of the first frequency band.

Thirdly, the preset synchronization grid deviation is the synchronization grid deviation of the first frequency domain range; the first frequency domain range is a frequency domain range to which the first frequency band belongs during synchronous grid design.

That is, the positions of the synchronization grids of all frequency bands belonging to the first frequency domain range are determined by presetting the synchronization grid offsets, thereby determining the frequency of the at least one first synchronization grid in the target frequency range.

For example: the first frequency Band is a Band n38 frequency Band, and the Band n38 frequency Band should meet the limitation of the position of the synchronization grid in the frequency domain range of 0MHz to 2700MHz during the design of the synchronization grid, so when the first frequency Band is a Band n38 frequency Band, the first frequency domain range is 0MHz to 2700MHz, and the determination of the positions of all the synchronization grids belonging to the frequency Band in the first frequency domain by presetting the synchronization grid offset is as follows: and determining the positions of all the synchronous grids belonging to the frequency band of 0MHz-2700MHz by presetting synchronous grid offset.

Optionally, when the first frequency Band is a Band n38 frequency Band, and the second frequency Band is a Band n41 frequency Band, the local frequency is 2700MHz, and if there is a frequency deviation of [ -20ppm, +20ppm ], and if there is a frequency deviation of 2700MHz × 20ppm ═ 54kHz, then the threshold value of the frequency deviation is [ -54kHz, +54kHz ], and then the preset synchronization grid may be shifted to 175 kHz.

That is, the frequency interval between two adjacent synchronization grids in each synchronization grid cluster on the Band n38 frequency Band may be set to 175 kHz.

Optionally, when the first frequency Band is a Band n38 frequency Band, and the second frequency Band is a Band n41 frequency Band, the local frequency is 2700MHz, and if there is a frequency deviation of [ -20ppm, +20ppm ], the local frequency is 2700MHz × 20ppm ═ 54kHz, so that the frequency deviation threshold may be set to 54kHz, and then the preset synchronization grid may be shifted to 175 kHz.

That is, the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 Band may be set to 175kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the range of 0MHz to 2700MHz may be set to 175kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 Band may be set to 175kHz over the overlapping frequency range of 2570MHz to 2620 MHz.

At this time, the frequency coincidence and the number of the synchronization grids are as shown in the following table 1, in which SS_REFIs the frequency domain location of the SSB. Based on the values of M and N, the number of the synchronization Grid (GSCN) corresponds to the frequency domain position of the synchronization grid (SSB).

TABLE 1

Optionally, when the first frequency Band is a Band n38 frequency Band, and the second frequency Band is a Band n41 frequency Band, the local frequency is 2700MHz, and if there is a frequency deviation of [ -20ppm, +20ppm ], the 2700MHz × 20ppm is 54kHz, so that the frequency deviation threshold may be set to 54kHz, and at this time, the preset synchronization grid may be shifted and set to 180 kHz.

That is, the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 180kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the 0MHz-2700MHz Band may be set to 180kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 180kHz over the overlapping frequency range 2570MHz-2620 MHz.

At this time, the frequency coincidence and the number of the synchronization grids are as shown in the following table 2, in which SS_REFIs the frequency domain location of the SSB. Based on the values of M and N, the number of the synchronization Grid (GSCN) corresponds to the frequency domain position of the synchronization grid (SSB).

TABLE 2

Optionally, when the first frequency Band is a Band n38 frequency Band, and the second frequency Band is a Band n41 frequency Band, the local frequency is 2700MHz, and if there is a frequency deviation of [ -5ppm, +5ppm ], the local frequency is 2700MHz by 5ppm ═ 13.5kHz, so that the frequency deviation threshold may be set to 13.5kHz, and at this time, the preset synchronization grid offset may be set to 85 kHz.

That is, the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 85kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in 0MHz-2700MHz may be set to 85kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 85kHz in the overlapping frequency range 2570MHz-2620 MHz.

At this time, the frequency coincidence and the number of the synchronization grids are as shown in the following table 3, in which SS_REFIs the frequency domain location of the SSB. Based on the values of M and N, the number of the synchronization Grid (GSCN) corresponds to the frequency domain position of the synchronization grid (SSB).

TABLE 3

Optionally, when the first frequency Band is a Band n38 frequency Band, and the second frequency Band is a Band n41 frequency Band, the local frequency is 2700MHz, and if there is a frequency deviation of [ -5ppm, +5ppm ], the local frequency is 2700MHz by 5ppm ═ 13.5kHz, so that the frequency deviation threshold may be set to 13.5kHz, and at this time, the preset synchronization grid may be shifted to 95 kHz.

That is, the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 95kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the 0MHz-2700MHz Band may be set to 95kHz, or the frequency interval between two synchronization grids adjacent in each synchronization grid cluster in the Band n38 frequency Band may be set to 95kHz over the overlapping frequency range 2570MHz-2620 MHz.

At this time, the frequency coincidence and the number of the synchronization grids are as shown in the following table 4, in which SS_REFIs the frequency domain location of the SSB. Based on the values of M and N, the number of the synchronization Grid (GSCN) corresponds to the frequency domain position of the synchronization grid (SSB).

TABLE 4

Example II,

An embodiment of the present application provides a frequency band determining method, specifically, referring to fig. 4, the method includes:

s41, the first access network device transmits the first SSB in the first frequency band at least in the target frequency range.

Specifically, the first access network device sends the first SSB in the first frequency band in the target frequency range, and the first access network device may send the first SSB in the first frequency band in other frequency ranges except the target frequency range, and may also send other SSBs (for example, the SSBs that are the same as those in the prior art and do not include indication information).

In step S41, the first SSB may be transmitted on the synchronization trellis, or may be transmitted on a frequency other than the synchronization trellis, which is not limited in the embodiment of the present application.

S42, the second access network device transmits the second SSB in the second frequency band at least in the target frequency range.

The target frequency range is a frequency range overlapping with a frequency range of a first frequency band in a frequency range of the second frequency band, and the second SSB includes indication information, where the indication information is used to indicate that a frequency band to which the second SSB belongs is the second frequency band.

And S43, the terminal equipment receives the SSB sent by the access network equipment.

The SSB comprises indication information, and the indication information is used for indicating a frequency band to which the SSB belongs.

And S44, the terminal equipment determines the frequency band to which the SSB belongs according to the indication information.

Specifically, when the SSB received by the terminal device is the first SSB, it may be determined that the received SSB belongs to the first frequency band according to the indication information carried by the first SSB, and when the SSB received by the terminal device is the second SSB, it may be determined that the received SSB belongs to the second frequency band according to the indication information carried by the second SSB.

It should be noted that, in the above-described hardware embodiment, the first access network device and the second access network device may be one access network device, or may also be two access network devices independent of each other, that is, the first SSB and the second SSB may be sent by the same access network device, or may also be sent by the two access network devices respectively.

In the above embodiment, the first SSB of the first frequency band sent by the first access network device includes the indication information, and the indication information is used to indicate that the frequency band to which the first SSB belongs is the first frequency band, so that after receiving the SSB sent by the access network device, the terminal device can determine the frequency band to which the SSB belongs according to the indication information, and further determine the current frequency band, and thus the problem that the terminal device cannot determine the current frequency band can be solved in the embodiment of the present application.

Further, a specific implementation of the frequency band determination method provided in the second embodiment is described below.

The implementation mode 1,

The first SSB comprises indication information bits, and the indication information bits are used for carrying the indication information.

Correspondingly, after receiving the SSB sent by the access network device, the terminal device reads the indication information at the indication information bit of the first SSB.

That is, the access network device uses at least 1 bit in the first SSB as an indication information bit, and carries the indication information on the indication information bit, and then sends the first SSB to the terminal device, and after receiving the first SSB, the terminal device reads the indication information carried on the indication information bit of the first SSB, and then determines the frequency band to which the first SSB belongs according to the indication information.

Optionally, the indication information bit is a bit in a Physical Broadcast Channel (PBCH) bearer (payload) bit carried by the first SSB.

Optionally, the indication information bits are reserved bits in PBCH bearer bits carried by the first SSB.

The SSB carries PBCH, where the PBCH is used to carry a system Master Information Block (MIB), and the MIB carries RMSI-PDCCH-config information (also referred to as PDDCHConfigSIB1 information). The first 4 bits of the RMSI-PDCCH-configuration are used to help the terminal device to confirm the Remaining Minimum System Information (RMSI) Control Resource Set (core Set), and the last 4 bits are used to help the terminal device to determine the timing (location) of the Physical Downlink Control Channel (PDCCH) of the monitoring type0, that is, the position of the PDCCH monitoring window, and can determine the Orthogonal Frequency Division Multiplexing (OFDM) symbol number occupied by the core Set corresponding to each SSB.

The information carried by PBCH is divided into a physical layer generation part, i.e. timing-related PBCH bearer bits (also called timing-related PBCH payload bits in the protocol, which includes:

and a higher layer generation section, wherein the physical layer generates

A bit is indicated for a field, which is used to indicate whether the current SSB is carried in the first or second field of a frame.

When the number of SSBs in the SSB time window within 5ms is less than or equal to 4, namely L_maxWhen the number is equal to 4, the number is 4,

the method can also be used for generation of Demodulation Reference Signal (DMRS) sequences in the PBCH. At this time, the terminal device can determine whether the current SSB is transmitted in the first half frame or the second half frame by detecting the DMRS.

When the number of SSBs in the SSB time window within 5ms is 64 at most, L_maxWhen the number is 64, the number is as follows,

denoted is the high 3 bits of SSB index (are the 6)^th，5^th，and 4th bits of SS/PBCH block index，respectively)。

When the number of SSBs in the SSB time window within 5ms is at most 4 or at most 8, L_max4 or L_maxWhen the number is equal to 8, the number is as follows,

currently reserved (reserved).

In addition, PBCH currently carries 56 bits, and in a high frequency system, 55 bits are used, including 1 reserved ratio flag, and in a low frequency system, 53 bits are used, including 3 reserved bits (including:

) Therefore, in the above implementation, at least 1 reserved bit of the PBCH carrying bit can be used as the indication signalInformation bit, carrying indication information.

Illustratively, the indication information bit may be 1 bit reserved at low frequency. For example:

1 bit. The indication information bit can also be 1 bit reserved at both high frequency and low frequency.

Optionally, when the first frequency band belongs to a frequency band below 3GHz, the indication signal bit is a bit corresponding to a half-frame indication in PBCH carrying bits carried by the first SSB.

Specifically, for the frequency band of 3GHz-6GHz or above 6GHz, the number of SSBs in the SSB time window of 5ms is not more than 8 or not more than 64 (L)_max8 or L_max64) when the field indicates the corresponding bit

For indicating whether the current SSB is carried in the first half frame or the second half frame of a frame, however, for the frequency band below 3GHz, the number of SSBs in the SSB time window of 5ms is less than or equal to 4 (L)_max4) at this time

The method is used for generation of Demodulation Reference Signal (DMRS) sequences in PBCH. The terminal equipment can determine whether the current SSB is transmitted in the first half frame or the second half frame by detecting the DMRS, and actually, corresponding bits do not need to be indicated through the half frame

To obtain the position of the current SSB carried in a frame, therefore, for the frequency bands below 3GHz, the bits corresponding to the half-frame indication can be reused

To carry the indication information.

Further optionally, the indication information may be: and the frequency band number of the frequency band to which the first SSB belongs.

Specifically, the frequency bands having the overlapping frequency ranges are a frequency band a and a frequency band B, the indication information bit includes 1 bit, and if the value of the bit is one of 0 and 1, the number of the frequency band to which the SSB belongs is indicated as a, and if the value of the bit is the other of 0 and 1, the number of the frequency band to which the SSB belongs is indicated as B. For example: when the value of the bit is 0, the frequency band to which the SSB belongs is band n38, when the value of the bit is 1, the frequency band to which the SSB belongs is band n41, or when the value of the bit is 1, the frequency band to which the SSB belongs is band n38, and when the value of the bit is 0, the frequency band to which the SSB belongs is band n 41.

Further optionally, the indication information may be: a minimum channel bandwidth of a frequency band to which the first SSB belongs.

Specifically, the frequency range having the overlapped frequency bands is a frequency band a and a frequency band B, the minimum channel bandwidth of the frequency band a is X, the minimum channel bandwidth of the frequency band B is Y, the indication information bit includes 1 bit, if the value of the bit is one of 0 and 1, the minimum channel bandwidth of the frequency band to which the SSB belongs is indicated as X, and if the value of the bit is the other of 0 and 1, the minimum channel bandwidth of the frequency band to which the SSB belongs is indicated as Y. For example: when the value of the bit is 0, the minimum bandwidth of the frequency band to which the SSB belongs is indicated to be X, the frequency band to which the SSB belongs is determined to be frequency band A, and when the value of the bit is 1, the minimum bandwidth of the frequency band to which the SSB belongs is indicated to be Y, the frequency band to which the SSB belongs is determined to be frequency band B; or when the value of the bit is 0, the minimum bandwidth of the frequency band to which the SSB belongs is indicated as Y, the frequency band to which the SSB belongs is determined as B, and when the value of the bit is 1, the minimum bandwidth of the frequency band to which the SSB belongs is indicated as X, the frequency band to which the SSB belongs is determined as a frequency band a.

Further optionally, the indication information may be: and the RMSI CORESET configuration information of the frequency band to which the first SSB belongs.

The RMSI core configuration information of the frequency band to which the first SSB belongs may specifically include: time domain duration occupied by the frequency band to which the first SSB belongs, frequency domain bandwidth of the frequency band to which the first SSB belongs, frequency domain position of the frequency band to which the first SSB belongs, and the like.

Specifically, the frequency bands having overlapping frequency ranges are the frequency band a and the frequency band B, under the limitation of the SSB SCS and the minimum bandwidth of each of the frequency bands a and B, the RMSI CORESET configuration information of the frequency band a is determined by the RMSI CORESET configuration table T1, the RMSI CORESET configuration information of the frequency band B is determined by the RMSI CORESET configuration table T2, the indication information bit includes 1 bit, the RMSI CORESET configuration information indicating the frequency band to which the SSB belongs is determined by the RMSI CORESET configuration table T1 when the value of the bit is one of 0 and 1, and the RMSI CORESET configuration information indicating the frequency band to which the SSB belongs is determined by the RMSI CORESET configuration table T2 when the value of the bit is the other of 0 and 1.

Implementation mode 2,

The indication information and at least one parameter carried by the PBCH carried by the first SSB are jointly coded through a preset coding rule.

Correspondingly, before the terminal device determines the frequency band to which the first SSB belongs according to the indication information, the terminal device further decodes at least one parameter carried by the PBCH carried by the first SSB according to a preset decoding rule to obtain the indication information.

That is, the access network device jointly encodes at least one parameter carried by the PBCH carried by the indication information and the first SSB according to a preset encoding rule, and then sends the first SSB to the terminal device, and after receiving the first SSB, the terminal device decodes at least one parameter carried by the PBCH carried by the first SSB according to a preset decoding rule to obtain the indication information, and then determines the frequency band to which the first SSB belongs according to the indication information.

For example, SSB-subcarrier-offset and/or RMSI-PDCCH-config in the MIB carried by the PBCH carried by the first SSB may be jointly encoded by a preset encoding rule. That is, different values of ssb-subanticarrier-offset may correspond to different indication information, different values of RMSI-PDCCH-config may correspond to different indication information, or different combinations of ssb-subanticarrier-offset and RMSI-PDCCH-config values may correspond to different indication information.

Implementation mode 3,

The indication information includes: a first CRC mask, the first CRC mask uniquely corresponding to the first frequency bin; and CRC bits of PBCH carried by the SSB of the first frequency band are scrambled by adopting a first CRC mask.

Correspondingly, the determining, by the terminal device, the frequency band to which the received SSB belongs according to the indication information includes: acquiring a first CRC mask; and acquiring the frequency band of the SSB according to the first CRC mask. Wherein the first CRC mask is a CRC mask for enabling the bit sequence to pass CRC check when CRC bits in the bit sequence of the SSB are descrambled by using a candidate CRC mask.

That is, the access network device further scrambles the CRC bits with different CRC masks for PBCHs carried by SSBs corresponding to different frequency bands, and after receiving the SSBs sent by the access network device, the terminal device performs CRC bit check based on multiple candidate CRC masks, and determines the frequency band to which the received SSBs belong according to the CRC mask that passes the CRC bit check.

Specifically, the CRC of the PBCH carried by the SSB is generated as follows:

wherein, c_kIndicates that the SSB carries the CRC of PBCH; a represents the information bit length of the coded PBCH; l represents a CRC bit length; b_kRepresents CRC check bits generated from the information bits;

the representation corresponds to a CRC mask.

The access network device adopts the CRC generated by any CRC mask, and the terminal device must pass the CRC mask to pass the CRC check, so that the CRC mask can be used as the indication information by setting the corresponding relationship between the CRC mask and the frequency band.

For example: and scrambling the CRC of the PBCH carried by the SSB corresponding to the band n38 by using a CRC mask X2, scrambling the CRC of the PBCH carried by the SSB corresponding to the band n41 by using a CRC mask Y2, if the CRC mask X2 passes CRC check, the frequency band to which the SSB belongs is considered as the band n38, and if the CRC mask Y2 passes CRC check, the frequency band to which the SSB belongs is considered as the band n 41.

Example III,

An embodiment of the present application provides a frequency band determining method, which, referring to fig. 5, includes:

s51, the first access network device carries the first SSB in the first frequency band at a first position in a frame and transmits the first SSB.

Wherein the first location is different from a second location of a second SSB carrying the second frequency band in a frame, a frequency range of the first frequency band has an intersection with a frequency range of the second frequency band, and a period of the first SSB (SSB-PeriodicityServingCell) and a period of the second SSB are both greater than 5 milliseconds.

S52, the second access network device carries the second SSB in the second frequency band at a second position in a frame for transmission.

Wherein the second location is different from a first location of a first SSB carrying the first frequency band in a frame, a frequency range of the first frequency band has an intersection with a frequency range of the second frequency band, and a period of the first SSB (SSB-PeriodicityServingCell) and a period of the second SSB are both greater than 5 milliseconds.

S53, the terminal device receives the SSB sent by the network access device.

S54, the terminal device determines the frequency band to which the SSB belongs according to the position of the SSB in a frame.

Specifically, when the position of the SSB received by the terminal device in a frame is a first position, it may be determined that the received SSB belongs to a first frequency band, and when the position of the SSB received by the terminal device in a frame is a second position, it may be determined that the received SSB belongs to a second frequency band.

Similarly, in the above hardware embodiment, the first access network device and the second access network device may be one access network device, or may also be two access network devices independent of each other, that is, the first SSB and the second SSB may be sent by the same access network device, or may also be sent by the two access network devices respectively.

As shown above, if the period of the SSB is greater than 5 milliseconds (belonging to a frequency band above 3 GHz), the SSB is only carried after the first half frame or after the second half frame of a frame for transmission, so that by setting the corresponding relationship between the carrying position and the frequency band of the SSB in a frame during transmission, after the terminal device receives the SSB sent by the access network device, the frequency band to which the received SSB belongs can be determined according to the position of the SSB in the frame.

In the frequency band determining method provided in the third embodiment, because the access network device carries the first SSB in the first frequency band at the first position in the frame for transmission, and carries the second SSB in the second frequency band at the second position in the frame for transmission, where the first position is different from the second position, after receiving the SSB transmitted by the network access device, the terminal device may determine the frequency band to which the SSB belongs according to the position of the SSB in the frame, and further determine the current frequency band, and therefore the problem that the terminal device cannot determine the current frequency band can be solved in the embodiment of the present application.

Optionally, the first position is located in a first half frame of a frame, and the second position is located in a second half frame of the frame.

Correspondingly, the determining, by the terminal device, the frequency band to which the SSB belongs according to the position of the SSB in a frame includes:

if the SSB is in the first half frame of a frame, determining the frequency band to which the SSB belongs as a first frequency band;

and if the SSB is in the second half frame of the two frames, determining the frequency band to which the SSB belongs as a second frequency band.

For example, the SSB in the first frequency band is carried in the first half frame of a frame for transmission, and the SSB in the second frequency band is carried in the second half frame of the frame for transmission, so that the SSB received by the terminal device is carried in the first half frame of the frame, and it is determined that the frequency band to which the received SSB belongs is the first frequency band, and the SSB received by the terminal device is carried in the second half frame of the frame, and it is determined that the frequency band to which the received SSB belongs is the second frequency band. Or, the SSB in the first frequency band is carried in the second half frame of the frame for transmission, the SSB in the second frequency band is carried in the first half frame of the frame for transmission, and the SSB received by the terminal device is carried in the first half frame of the frame, so that it is determined that the frequency band to which the received SSB belongs is the second frequency band, and the SSB received by the terminal device is carried in the second half frame of the frame, so that it is determined that the frequency band to which the received SSB belongs is the first frequency band.

Example four,

An embodiment of the present application provides a frequency band determination method, and as shown in fig. 6, the frequency band determination method includes:

s61, the first access network device prohibits transmitting the SSB of the first frequency band on the first synchronization grid when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold.

S62, the second access network device sends the SSB of the second frequency band on the second synchronization grid.

That is, the SSB of the first frequency band is prohibited from being transmitted on the first synchronization grid, and the SSB of the second frequency band is allowed to be transmitted on the second synchronization grid.

And S63, the terminal equipment receives the SSB sent by the access network equipment.

S64, the terminal device determines the frequency band to which the SSB belongs according to the frequency band to which the synchronization grid which sends the SSB belongs.

In the foregoing implementation manner 1, the terminal device does not receive the SSB sent on the first synchronization grid, and only receives the SSB sent on the second synchronization grid, so that when the SSB sent on the first synchronization grid or the second synchronization grid is received, the terminal device may determine that the frequency band to which the received SSB belongs is the second frequency band, and further determine that the current frequency band is the second frequency band.

An embodiment of the present application provides a frequency band determining method, and as shown in fig. 7, the frequency band determining method includes:

s71, the first access network device prohibits transmitting the SSB of the first frequency band on the first synchronization grid when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold.

S72, the second access network device prohibits transmitting the SSB of the second frequency band on the second synchronization grid when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold.

And S73, the terminal equipment receives the SSB sent by the access network equipment.

S74, the terminal device determines the frequency band to which the SSB belongs according to the frequency band to which the synchronization grid which sends the SSB belongs.

That is, the SSB of the first frequency band is prohibited from being transmitted on the first synchronization grid, and the SSB of the second frequency band is prohibited from being transmitted on the second synchronization grid.

In the foregoing implementation manner 2, the terminal device does not receive the SSBs sent on the first synchronization grid and the second synchronization grid, so that when the terminal device receives the SSBs, the terminal device can determine the frequency band to which the synchronization grid sending the SSBs belongs, and further determine the frequency band to which the SSBs belong.

In the frequency band determining method provided in the fourth embodiment, when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold, the access network device prohibits sending the SSB of the first frequency band on the first synchronization grid, that is, when the frequency interval between the two synchronization grids is smaller than the frequency deviation threshold, the access network device only sends the SSB on one of the synchronization grids or does not send the SSB on both of the synchronization grids, so that when receiving the SSB sent on the synchronization grid, the terminal device may avoid a problem that the terminal device cannot determine the synchronization grid sending the SSB because the frequency deviation error between two or more synchronization grids possibly sending the SSB is smaller than the initial frequency deviation error, and thus the terminal device may determine the frequency band of the received SSB when receiving the SSB.

Example V,

An embodiment of the present invention provides an access network device, and referring to fig. 8, the access network device 800 includes:

a transmitting unit 81, configured to transmit a synchronization signal block SSB of a first frequency band on at least one first synchronization grid in a target frequency range;

Optionally, the access network device further includes: a processing unit;

the processing unit is configured to determine a frequency of the at least one first synchronization grid in the target frequency range according to a preset synchronization grid offset;

wherein the preset synchronization grid offset is greater than or equal to the frequency deviation threshold;

Optionally, the first frequency Band is a Band n38 frequency Band, the second frequency Band is a Band n41 frequency Band, and the preset synchronization grid offset is 175kHz, 180kHz, 85kHz, or 95 kHz.

In the above embodiment, the access network device sends the SSB of the first frequency band on at least one first synchronization grid in the target frequency range; because the frequency interval between any one first synchronization grid and any one second synchronization grid in the second frequency bands is greater than or equal to the frequency deviation threshold, after the terminal device receives the SSB sent by the access network device, the frequency band to which the synchronization grid sent by the access network device belongs can be determined, the frequency band to which the SSB belongs can be further determined, and the current frequency band can be further determined.

a transmitting unit 81, configured to transmit a first synchronization signal block SSB of a first frequency band at least in a target frequency range;

Optionally, the first SSB includes indication information bits, and the indication information bits are used for carrying the indication information.

Optionally, the indication information bits are bits in PBCH bearer bits carried by the first SSB;

or;

and when the first frequency band belongs to a frequency band below 3GHz, the indication signal bit is a bit corresponding to a field indication of a PBCH carrying bit carried by the first SSB.

Optionally, the indication information includes: and at least one of the frequency band number of the first frequency band, the minimum channel bandwidth of the first frequency band, and the configuration information of the remaining minimum system information RMSI control resource group CORESET of the first frequency band.

Optionally, the indication information and at least one parameter carried by the PBCH carried by the first SSB are jointly encoded by a preset encoding rule.

Optionally, the indication information includes: a first cyclic redundancy check, CRC, mask, the first CRC mask uniquely corresponding to the first frequency band;

and CRC bits of PBCH carried by the SSB of the first frequency band are scrambled by adopting a first CRC mask.

In the above embodiment, the first SSB of the first frequency band sent by the access network device includes the indication information, and the indication information is used to indicate that the frequency band to which the first SSB belongs is the first frequency band, so that after the terminal device receives the first SSB sent by the access network device, the terminal device can determine that the frequency band to which the first SSB belongs is the first frequency band according to the indication information, and then determine that the current frequency band is the first frequency band, and therefore, the problem that the terminal device cannot determine the current frequency band can be solved in the embodiment of the present application.

a sending unit 81, configured to send a first synchronization signal block SSB in a first frequency band carried at a first position in a frame;

In the above embodiment, the access network device carries the first SSB in the first frequency band at the first position in the frame for transmission, and carries the second SSB in the second frequency band at the second position in the frame for transmission, where the first position is different from the second position, so that after receiving the SSB transmitted by the network access device, the terminal device can determine the frequency band to which the SSB belongs according to the position of the SSB in the frame, and further determine the current frequency band, and thus the embodiment of the present application can solve the problem that the terminal device cannot determine the current frequency band.

a sending unit 81, configured to prohibit, by the access network device, sending a synchronization signal block SSB in a first frequency band on a first synchronization grid when it is determined that a frequency interval between the first synchronization grid and a second synchronization grid is smaller than a frequency deviation threshold;

In the foregoing embodiment, the access network device prohibits sending the SSB of the first frequency band on the first synchronization grid when determining that the frequency interval between the first synchronization grid and the second synchronization grid is smaller than the frequency deviation threshold, that is, when the frequency interval between the two synchronization grids is smaller than the frequency deviation threshold, the SSB is sent only on one synchronization grid or the SSB is not sent on neither synchronization grid, so that when receiving the SSB sent on the synchronization grid, the terminal device may avoid a problem that the terminal device cannot determine the synchronization grid sending the SSB due to a smaller error than the initial frequency deviation between the frequencies of the two or more synchronization grids that may send the SSB, and thus the terminal device may determine the current frequency band when receiving the SSB.

Fig. 9 is a schematic diagram of a hardware structure of an access network device for implementing various embodiments of the present invention, where the access network device 800 includes: a processor 801, a transceiver 802, a memory 803, a communication interface 804, and a bus interface.

Wherein the transceiver 802 is configured to transmit a synchronization signal block SSB of a first frequency band on at least one first synchronization grid in a target frequency range;

Or;

the transceiver 802 is configured to transmit a first synchronization signal block SSB of a first frequency band at least in a target frequency range;

Or;

the transceiver 802 is configured to carry a first synchronization signal block SSB in a first frequency band at a first position in a frame and transmit the first synchronization signal block SSB;

Or;

the transceiver 802 is configured to prohibit, by the access network device, the transmission of a synchronization signal block SSB of a first frequency band on a first synchronization grid when it is determined that a frequency interval between the first synchronization grid and a second synchronization grid is smaller than a frequency deviation threshold;

In an embodiment of the invention, in FIG. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by the processor 801 and various circuits of memory represented by the memory 803 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 802 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The communication interface 804 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 in performing operations.

In addition, the access network device 800 further includes some functional modules that are not shown, and are not described herein again.

Example six,

An embodiment of the present invention provides a terminal device, and referring to fig. 10, the terminal device 100 includes:

a receiving unit 101, configured to receive a first synchronization signal block SSB sent by an access network device, where the first SSB includes indication information, and the indication information is used to indicate that a frequency band to which the first SSB belongs is a first frequency band;

and the processing unit 102 is configured to determine, according to the indication information, a frequency band to which the SSB belongs.

Optionally, the processing unit 102 is further configured to read the indication information at an indication information bit of the first SSB; the indication information is carried in indication information bits of the first SSB.

Optionally, the indication information bits are bits in PBCH bearer bits carried by the first SSB.

Optionally, the indication information bits are reserved bits in PBCH bearer bits carried by the first SSB;

or;

and when the first frequency band belongs to a frequency band below 3GHz, the indication signal bit is a bit corresponding to a field indication in PBCH carrying bits carried by the first SSB.

Optionally, the indication information includes: and at least one of the frequency band number of the frequency band to which the first SSB belongs, the minimum channel bandwidth of the frequency band to which the first SSB belongs, and the configuration information of the remaining minimum system information RMSI control resource group CORESET of the frequency band to which the first SSB belongs.

Optionally, the processing unit 102 is further configured to decode, according to a preset decoding rule, at least one parameter carried by a PBCH carried by the first SSB to obtain the indication information.

Optionally, the indication information includes: cyclic Redundancy Check (CRC) masks, wherein any CRC mask uniquely corresponds to one frequency band;

the processing unit 102 is specifically configured to acquire a first CRC mask, and acquire, according to the first CRC mask, a frequency band to which the first SSB belongs as a first frequency band; the first CRC mask is a CRC mask for passing a CRC check on a bit sequence of the SSB when the CRC bits in the bit sequence are descrambled using a candidate CRC mask.

In the above embodiment, the first SSB of the first frequency band received by the terminal device includes the indication information, and the indication information is used to indicate that the frequency band to which the first SSB belongs is the first frequency band, so after the terminal device receives the SSB sent by the access network device, the terminal device can determine that the frequency band to which the SB belongs is the first frequency band according to the indication information, and then determine that the frequency band at which the terminal device currently belongs is the first frequency band, and therefore the problem that the terminal device cannot determine the frequency band at which the terminal device currently belongs can be solved in the embodiment of the present application.

a receiving unit 101, configured to receive a synchronization signal block SSB sent by a network access device;

a processing unit 102, configured to determine, according to a position of the SSB in a frame, a frequency band to which the SSB belongs;

Optionally, if the SSB is in a first half frame of a frame, the processing unit determines that a frequency band to which the SSB belongs is a first frequency band;

and if the SSB is in the second half frame of the two frames, the processing unit determines that the frequency band to which the SSB belongs is the second frequency band.

In the above embodiment, the SSBs received by the terminal device at different positions in one frame belong to different frequency bands, so that after receiving the SSBs sent by the network access device, the terminal device can determine the frequency band to which the SSB belongs according to the position of the SSB in one frame, and further determine the current frequency band.

Fig. 11 is a schematic diagram of a hardware structure of a terminal device for implementing an embodiment of the present invention, where the terminal device 100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 11 does not constitute a limitation of the terminal device, and that the terminal device may include more or fewer components than shown, or combine certain components, or a different arrangement of components. In the embodiment of the present application, the terminal device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 101 is configured to receive a synchronization signal block SSB sent by a network access device.

The first SSB comprises indication information, and the indication information is used for indicating that a frequency band to which the first SSB belongs is a first frequency band; or a first position of a first SSB in a frame carrying the first frequency band is different from a second position of a second SSB in a frame carrying the second frequency band, a frequency range of the first frequency band and a frequency range of the second frequency band have an intersection, and a period of each of the first SSB and the second SSB is greater than 5 milliseconds.

A processor 110, configured to determine a frequency band to which the SSB belongs according to the indication information, or determine a frequency band to which the SSB belongs according to a position of the SSB in a frame.

It should be understood that, in the embodiment of the present application, the radio frequency unit 101 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.

The terminal device provides wireless broadband internet access to the user through the network module 102, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the terminal device 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive an audio or video signal. The input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.

The terminal device 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the terminal device 100 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in multiple directions (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and receives and executes commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 11, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the terminal device, and is not limited herein.

The interface unit 108 is an interface for connecting an external device to the terminal apparatus 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 100 or may be used to transmit data between the terminal apparatus 100 and the external device.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the terminal device, connects various parts of the entire terminal device using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the terminal device. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The terminal device 100 may further include a power supply 111 (such as a battery) for supplying power to the plurality of components, and preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal device 100 includes some functional modules that are not shown, and are not described in detail here.

An embodiment of the present application further provides a terminal device, and referring to fig. 12, the terminal device 100 includes: the processor 121, the memory 122, and a computer program stored in the memory 122 and capable of running on the processor 121, where the computer program is executed by the processor 121 to implement the process of the frequency band determining method in the first embodiment, and can achieve the same technical effect, and are not described herein again to avoid repetition.

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

An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements a plurality of processes of the foregoing frequency band determining method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer readable storage medium is, for example, ROM, RAM, magnetic disk or optical disk.

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

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

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A frequency band determination method is applied to an access network device, and the method comprises the following steps:

transmitting a synchronization signal block SSB of a first frequency band on at least one first synchronization grid in a target frequency range;

2. The method of claim 1, wherein prior to transmitting the SSB for the first frequency bin on at least one first synchronization grid in the target frequency range, the method further comprises:

determining the frequency of the at least one first synchronization grid in the target frequency range according to a preset synchronization grid offset;

3. The method of claim 2, wherein the first frequency Band is a Band n38 frequency Band, the second frequency Band is a Band n41 frequency Band, and the predetermined synchronization grid offset is 175kHz or 180kHz or 85kHz or 95 kHz.

4. An access network device, comprising:

a transmitting unit, configured to transmit a synchronization signal block SSB of a first frequency band on at least one first synchronization grid in a target frequency range;

5. An access network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the frequency band determination method according to any of claims 1-3.

6. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the frequency band determination method according to any one of claims 1 to 3.