A method and device for determining a master information block

Abstract

A method and device for determining a master information block (MIB) are used to solve the problem in the prior art that a terminal device cannot determine whether a received MIB belongs to an authorized frequency band or an unauthorized frequency band, resulting in a failure of the terminal device to demodulate the MIB and an inability to access a cell on a designated frequency band. The method is as follows: a network device sends a synchronization information block to a terminal device, and at least one field in the MIB contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unauthorized frequency band; after the terminal device receives the synchronization information block from the network device, the terminal device determines that the MIB is a MIB applied to an unauthorized frequency band based on the fields in the MIB contained in the synchronization information block. In this way, the terminal device can clearly determine whether the received MIB is a MIB applied to an unauthorized frequency band based on at least one field of the MIB in the synchronization information block, and then accurately access the corresponding cell subsequently.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for determining a master information block (MIB). Background Art

[0002] With the evolution of communication technology, the available frequency bands are constantly increasing. New radio (NR) systems divide frequency bands into two main categories: frequency range 1 (FR1) and FR2. FR1 primarily covers the 450MHz to 6GHz bandwidth, while FR2 primarily covers the 24.25GHz to 52.6GHz bandwidth. The frequency band between 6425MHz and 7125MHz (U6GHz) is a shared frequency band and falls within the FR1 category.

[0003] Deploying systems in shared bands, as a supplement to licensed bands, not only improves system throughput but also addresses spectrum resource shortages. Within the framework of fifth-generation mobile communications, technologies deployed in shared bands are collectively referred to as new radio unlicensed (NRU) technologies. Systems operating in shared bands must support all or some of the following key technologies: listen before talk (LBT), transmit power control (TPC), and dynamic frequency selection (DFS).

[0004] After scanning the frequencies within each band, the terminal device blindly detects the synchronization signal block pattern (SS / PBCH block pattern) sent by the base station. The synchronization block (SS / PBCH block) is the primary information demodulated by the terminal device during initial access. It primarily consists of the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH). It consists of a two-dimensional region consisting of four orthogonal frequency division multiplexing (OFDM) symbols in the time-frequency domain and 20 resource blocks (RBs) in the frequency domain. By demodulating the PSS and SSS, the terminal device achieves cell synchronization and coarse symbol-level timing synchronization. The PBCH carries the MIB configured by higher layers, and the terminal device achieves system frame-level timing synchronization by demodulating the MIB.

[0005] Currently, base stations operating in licensed and unlicensed bands transmit MIBs carrying different information. For the U6 GHz band, some regions may have both licensed and unlicensed frequencies, while others may have a fully licensed frequency band. Consequently, terminal devices cannot determine whether a received MIB is for the licensed or unlicensed band, resulting in failure to demodulate the MIB and access to cells in the designated frequency band. Summary of the Invention

[0006] The present application provides a method and apparatus for determining a master information block (MIB) to solve the problem in the prior art that a terminal device cannot determine whether the received MIB belongs to an authorized frequency band or an unauthorized frequency band, resulting in failure of the terminal device to demodulate the MIB and inability to access a cell on a specified frequency band.

[0007] In the first aspect, the present application provides a method for determining an MIB, the method comprising: a network device sends a synchronization information block to a terminal device, wherein at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; after the terminal device receives the synchronization information block from the network device, the terminal device determines whether the MIB is a MIB applied to an unlicensed frequency band based on at least one field contained in the synchronization information block, wherein the at least one field is located in the MIB.

[0008] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band according to the field of the MIB in the synchronization information block.

[0009] In one possible design, the at least one field is a spare field, and the spare field includes one bit; when the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band.

[0010] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band based on the detected spare field.

[0011] In one possible design, the at least one field is a demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; when the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; when the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band.

[0012] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band according to the detected demodulation reference signal type A position field.

[0013] In one possible design, the at least one field is a synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; the least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, the most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, any one bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, at least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0014] Through the above method, it is possible to flexibly determine whether the received MIB is the MIB applied to the unlicensed frequency band based on the detected synchronization signal subcarrier offset field.

[0015] In one possible design, when the least significant bit, the most significant bit, or any bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the least significant bit, the most significant bit, or any bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to an authorized frequency band.

[0016] Through the above method, it is possible to determine whether the received MIB is the MIB applied to the unlicensed frequency band based on a certain bit in the detected synchronization signal subcarrier offset field, which is relatively simple to implement.

[0017] In one possible design, the at least one field includes at least two fields of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; and the bits included in the at least two fields jointly indicate whether the MIB is a MIB applicable to an unlicensed frequency band. In this way, the terminal device can determine whether the received MIB is a MIB applicable to an unlicensed frequency band based on at least one field of the MIB in the synchronization information block.

[0018] In the second aspect, the present application provides a method for determining MIB, which may include: a network device sends a synchronization information block to a terminal device, and the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band; after the terminal device receives the synchronization information block from the network device, it determines whether the MIB is a MIB applied to an unlicensed frequency band based on the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block.

[0019] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block, so as to accurately access the corresponding cell subsequently.

[0020] In one possible design, the time domain position of at least one of the PSS and the SSS is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band. Specifically, it can be: when the PSS is located on the first orthogonal frequency division multiplexing OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band. MIB for the licensed band; or, in the case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed band, otherwise, the MIB is the MIB applied to the licensed band; or, in the case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed band, otherwise, the MIB is the MIB applied to the licensed band; or, in the case where the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed band, otherwise, the MIB is the MIB applied to the licensed band.

[0021] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band based on the time domain position of at least one of the detected PSS and SSS.

[0022] In one possible design, the time domain position of the PBCH information is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band, specifically: when the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or, when the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the second frequency domain position on the third OFDM symbol of the synchronization information block, the The MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band; or, when the first demodulation reference signal DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band; or, when the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band; wherein the first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

[0023] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band according to the time domain position of the detected PCBH information, or according to the position of the DMRS included in the detected PBCH information.

[0024] In one possible design, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

[0025] In one possible design, the third frequency domain position includes the subcarrier numbered {0+v, 4+v, ..., 44+v} of the synchronization information block, and the fourth frequency domain position includes the subcarrier numbered {192+v, 196+v, ..., 236+v} of the synchronization information block; or, the first frequency domain position includes the subcarrier numbered {192+v, 196+v, ..., 236+v} of the synchronization information block, and the second frequency domain position includes the subcarrier numbered {0+v, 4+v, ..., 44+v} of the synchronization information block; wherein, It is the cell identifier.

[0026] In one possible design, the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarriers with subcarrier numbers {48, 49, ..., , 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block does not contain information; the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

[0027] By using the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band, and the synchronization information block does not contain any information.

[0028] In the third aspect, the present application provides a method for determining an MIB, which includes: a network device sends a synchronization information block to a terminal device, and at least one field contained in the synchronization information block is used to indicate that the MIB is a first-class MIB or a second-class MIB; after the terminal device receives the synchronization information block from the network device, it determines whether the MIB is a first-class MIB or a second-class MIB based on at least one field contained in the synchronization information block; wherein the at least one field is located in the MIB; the first-class MIB corresponds to an authorized frequency band, and the second-class MIB corresponds to an unauthorized frequency band, or the first-class MIB corresponds to an unauthorized frequency band, and the second-class MIB corresponds to an authorized frequency band.

[0029] Through the above method, the terminal device can clearly determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on at least one field in the synchronization information block, and then accurately access the corresponding cell.

[0030] In one possible design, the at least one field is a spare field, and the spare field includes one bit; when the one bit is 0, the MIB is a first-type MIB; when the one bit is 1, the MIB is a second-type MIB.

[0031] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band according to the specific value of the spare field detected.

[0032] In one possible design, the at least one field is a demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; when the one bit is 0, the MIB is a first type MIB; when the one bit is 1, the MIB is a second type MIB.

[0033] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band or the MIB applied to the licensed frequency band based on the specific value of the detected demodulation reference signal type A position field.

[0034] In one possible design, the at least one field is a synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; the lowest bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, the highest bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, any one bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, at least two bits of the four bits jointly indicate that the MIB is a first-class MIB or a second-class MIB.

[0035] Through the above method, it is possible to flexibly determine whether the received MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band according to the specific value of the detected synchronization signal subcarrier offset field.

[0036] In one possible design, when the least significant bit, the most significant bit, or any bit is 0, the MIB is a first-category MIB; and when the least significant bit, the most significant bit, or any bit is 1, the MIB is a second-category MIB.

[0037] Through the above method, it is possible to determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the specific value of a bit in the detected synchronization signal subcarrier offset field, which is relatively simple to implement.

[0038] In one possible design, the at least one field includes at least two fields of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; the bits included in the at least two fields jointly indicate that the MIB is a first-type MIB or a second-type MIB. In this way, the terminal device can clearly determine whether the received MIB is a MIB applicable to an unlicensed frequency band or a MIB applicable to a licensed frequency band based on at least one field of the MIB in the synchronization information block.

[0039] In a fourth aspect, the present application provides a method for determining an MIB, which may include: a network device sends a synchronization information block to a terminal device, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate that the MIB contained in the synchronization information block is a first-class MIB or a second-class MIB; after the terminal device receives the synchronization information block from the network device, it determines whether the MIB is a first-class MIB or a second-class MIB based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block; wherein the first-class MIB corresponds to an authorized frequency band, and the second-class MIB corresponds to an unauthorized frequency band, or, the first-class MIB corresponds to an unauthorized frequency band, and the second-class MIB corresponds to an authorized frequency band.

[0040] Through the above method, the terminal device can clearly determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block, so as to enable subsequent accurate access to the corresponding cell.

[0041] In one possible design, the time domain position of at least one of the PSS and the SSS is used to indicate that the MIB contained in the synchronization information block is a first-category MIB or a second-category MIB. Specifically, it may be: when the PSS is located on the first orthogonal frequency division multiplexing OFDM symbol of the synchronization information block, the MIB is a first-category MIB; when the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a second-category MIB; and / or, when the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a first-category MIB; when the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a second-category MIB.

[0042] Through the above method, the terminal device can clearly determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the time domain position of at least one of the detected PSS and SSS.

[0043] In one possible design, the time domain position of the PBCH information is used to indicate whether the MIB contained in the synchronization information block is a first-type MIB or a second-type MIB, which may be: when the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a first-type MIB; when the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a second-type MIB; or, when the first demodulation reference signal DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a first-type MIB; when the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the third OFDM symbol of the synchronization information block. In the case of a fourth frequency domain position on the symbol, the MIB is a second type MIB; wherein the first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

[0044] Through the above method, the terminal device can clarify whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the time domain position of the detected PCBH information or the position of the DMRS included in the detected PBCH information.

[0045] In one possible design, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

[0046] In one possible design, the third frequency domain position includes the subcarrier numbered {0+v, 4+v, ..., 44+v} of the synchronization information block, and the fourth frequency domain position includes the subcarrier numbered {192+v, 196+v, ..., 236+v} of the synchronization information block; or, the first frequency domain position includes the subcarrier numbered {192+v, 196+v, ..., 236+v} of the synchronization information block, and the second frequency domain position includes the subcarrier numbered {0+v, 4+v, ..., 44+v} of the synchronization information block; wherein, It is the cell identifier.

[0047] In one possible design, the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarriers with subcarrier numbers {48, 49, ..., , 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block does not contain information; the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

[0048] Through the above method, the terminal device can determine that when the received MIB is a MIB applied to an unlicensed frequency band, the location of the synchronization information block does not contain any information, or can determine that when the received MIB is a MIB applied to an authorized frequency band, the location of the synchronization information block does not contain any information.

[0049] In a fifth aspect, the present application further provides a device for determining an MIB, which may be a terminal device. The device for determining an MIB has the function of implementing the terminal device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0050] In one possible design, the structure of the MIB determination device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the terminal device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0051] In one possible design, the structure of the MIB determination device includes a transceiver and a processor, and optionally also includes a memory. The transceiver is used to transmit and receive data, and to communicate and interact with other devices in the communication system. The processor is configured to support the MIB determination device in performing the corresponding functions of the terminal device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. The memory is coupled to the processor and stores the necessary program instructions and data for the MIB determination device.

[0052] In a sixth aspect, the present application further provides a device for determining an MIB, which may be a network device. The device for determining an MIB has the function of implementing the network device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0053] In one possible design, the structure of the MIB determination device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the network device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0054] In one possible design, the structure of the MIB determination device includes a transceiver and a processor, and optionally also includes a memory. The transceiver is used to transmit and receive data, and to communicate and interact with other devices in the communication system. The processor is configured to support the MIB determination device to perform the corresponding functions of the network device in the first aspect or each possible design example of the first aspect, the second aspect or each possible design example of the second aspect, the third aspect or each possible design example of the third aspect, and the fourth aspect or each possible design example of the fourth aspect. The memory is coupled to the processor and stores the necessary program instructions and data for the device.

[0055] In a seventh aspect, an embodiment of the present application provides a communication system, which may include the terminal device and network device mentioned above.

[0056] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores program instructions. When the program instructions are run on a computer, the computer executes the first aspect of the embodiment of the present application and any possible design thereof, or the second aspect and any possible design thereof, or the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof. Exemplarily, the computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: the computer-readable medium can include non-transitory computer-readable media, random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0057] In a ninth aspect, an embodiment of the present application provides a computer program product comprising computer program code or instructions, which, when executed on a computer, enables the computer to implement the method described in any one of the above aspects.

[0058] In a tenth aspect, the present application also provides a chip, which is coupled to a memory and is used to read and execute program instructions stored in the memory to implement any of the above methods.

[0059] For each of the above-mentioned aspects from the fifth to the tenth aspect and the technical effects that may be achieved by each of the aspects, please refer to the above-mentioned description of the technical effects that can be achieved by various possible solutions in the first to the fourth aspects, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic diagram of the structure of a synchronization information block provided by this application;

[0061] Figure 2 A schematic diagram of the architecture of a communication system provided in this application;

[0062] Figure 3 A flowchart of a method for determining a MIB provided in this application;

[0063] Figure 4 A flowchart of another method for determining MIB provided by this application;

[0064] Figure 5 A schematic diagram of the structure of another synchronization information block provided by this application;

[0065] Figure 6 A schematic diagram of the structure of another synchronization information block provided by this application;

[0066] Figure 7 A schematic diagram of the structure of another synchronization information block provided by this application;

[0067] Figure 8 A flowchart of another method for determining MIB provided by this application;

[0068] Figure 9 A flowchart of another method for determining MIB provided by this application;

[0069] Figure 10 A schematic diagram of the structure of a MIB determination device provided by this application;

[0070] Figure 11 A structural diagram of a MIB determination device provided by this application;

[0071] Figure 12 A flowchart of another method for determining MIB provided by this application;

[0072] Figure 13 A schematic diagram of the configuration of a synchronization signal block provided by this application;

[0073] Figure 14 A schematic diagram of another configuration of a synchronization signal block provided in this application;

[0074] Figure 15 A schematic diagram of the SSB transmission position provided by this application;

[0075] Figure 16 Another SSB sending location diagram provided for this application. DETAILED DESCRIPTION

[0076] The present application will be described in further detail below with reference to the accompanying drawings.

[0077] The embodiments of the present application provide a method and apparatus for determining a MIB, which are used to address the problem in the prior art that a terminal device cannot determine whether a received MIB is for an authorized frequency band or an unlicensed frequency band, resulting in a failure of the terminal device to demodulate the MIB and be unable to access a cell on the specified frequency band. The method and apparatus described in this application are based on the same technical concept. Since the principles of the method and apparatus for solving the problem are similar, the implementation of the apparatus and method can refer to each other, and the repeated parts will not be repeated.

[0078] Below, some terms in this application are explained to facilitate understanding by those skilled in the art.

[0079] Currently, the network device can send the synchronization information block SS / PBCH block to the terminal device as follows: Figure 1 As shown in the structure shown, the synchronization information block includes PSS, SSS and PBCH, and is composed of 4 OFDM in the time-frequency domain and a two-dimensional area of ​​20 RBs in the frequency domain. In some embodiments, the synchronization information block can also be called a synchronization signal block. Among them, the terminal device can complete cell synchronization and coarse symbol-level timing synchronization by demodulating PSS and SSS; PBCH carries MIB information configured from a high layer, and the terminal device can complete system frame-level timing synchronization by demodulating MIB information, and obtain the position information of system information block 1 / remaining minimum system information (system information block / remaining minimum system information, SIB1 / RMSI) to facilitate further demodulation of the information in SIB1 / RMSI, that is, demodulating the type 0-physical downlink control channel (physical downlink control channel, type0-PDCCH) and physical downlink shared channel (physical downlink shared channel, PDSCH) of SIB1 / RMSI through the parameter (pdcch-ConfigSIB1).

[0080] According to the latest standard R16, terminal devices obtain the specific time domain position of type0-PDCCH according to the corresponding table specified in the protocol. However, the table used by terminal devices working in the authorized frequency band to obtain the specific time domain position of type0-PDCCH is different from the table used by terminal devices working in the unlicensed frequency band to obtain the specific time domain position of type0-PDCCH. In addition, the contents of the MIBs working in the authorized frequency band and the unlicensed frequency band are also different, mainly reflected in the differences in the parameters common subcarrier spacing (subCarrierSpacingCommon) and synchronization signal subcarrier offset (ssb-SubcarrierOffset) in the MIB. Specifically: For the licensed frequency band, the parameter "subCarrierSpacingCommon" indicates the subcarrier spacing used by SIB1, Msg2 / 4, paging and other system information (open system interconnect reference model (OSI)); the parameter "ssb-SubcarrierOffset" indicates the offset of the subcarrier between the SS / PBCH Block and the overlapping common resource block (CRB), that is, Kssb, the spacing between the subcarrier numbered 0 in the lowest-numbered RB occupied by the SS / PBCH Block and the subcarrier numbered 0 in the CRB. For unlicensed channels, the subcarrier spacing (SCS) of the demodulated SIB1 of the terminal device is the same as the SCS of the SS / PBCH Block with a quasi-co-location (QCL) relationship, so the parameter "subCarrierSpacingCommon" will be used for other purposes.

[0081] From the above, it can be seen that the MIB applied to the authorized frequency band is different from the MIB applied to the unauthorized frequency band. For the frequency band of U6GHz (6425MHz~7125MHz) and 52.6GHz~71GHz, in some areas, there may be part of the authorized frequency band and part of the unauthorized frequency band in this frequency band, and in other areas, such a frequency band is all authorized frequency bands. Therefore, for the terminal device, since it cannot be determined whether the received MIB is applied to the authorized frequency band or the unauthorized frequency band, the terminal device fails to demodulate the MIB and cannot access the cell on the specified frequency band. Based on this, the present application proposes a method for determining the MIB to solve the above problem, so as to enable the terminal device to determine whether the received MIB is applied to the authorized frequency band or the unauthorized frequency band.

[0082] In this application, the MIB applied to the authorized frequency band and the MIB applied to the unlicensed frequency band can be distinguished by name. Specifically, the MIB corresponding to the authorized frequency band can be called the first type MIB, and the MIB corresponding to the unlicensed frequency band can be called the second type MIB; or, the MIB corresponding to the authorized frequency band can be called the second type MIB, and the MIB corresponding to the unlicensed frequency band can be called the first type MIB. Alternatively, the MIB corresponding to the authorized frequency band can be called the new MIB, and the MIB corresponding to the unlicensed frequency band can be called the old MIB; or, the MIB corresponding to the authorized frequency band can be called the old MIB, and the MIB corresponding to the unlicensed frequency band can be called the new MIB. Of course, there can be other names, and this application does not limit them.

[0083] In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0084] In this application, "at least one" refers to one or more items, and "multiple items" refers to two or more items. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0085] In order to more clearly describe the technical solution of the embodiment of the present application, the MIB determination method and device provided in the embodiment of the present application are described in detail below with reference to the accompanying drawings.

[0086] Figure 2 The present invention provides an embodiment of the method for determining the MIB, which is applicable to the architecture of a possible communication system. The communication system operates in a shared frequency band of U6GHz (6425MHz to 7125MHz) and 52.6GHz to 71GHz. The architecture of the communication system may include a network device and multiple terminal devices, wherein the multiple terminal devices are Figure 2The example uses user equipment (UE) 1-UE5. Specifically, the network device can communicate with UE1-UE5. The communication links include uplink, downlink, and side-link (SL). The information transmitted in the communication links includes the actual data being transmitted and control information used to indicate or schedule the actual data. Furthermore, UE3-UE5 can form a sub-communication system, and UE3 and UE4 can perform side-link transmission based on D2D technology.

[0087] The network device is a device with wireless transceiver functions or a chip that can be set in the network device. The network device includes but is not limited to: a base station (gNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved NodeB, or a home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TRP or transmission point, TP), etc. It can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU).

[0088] The terminal device may also be referred to as UE, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios. In the present application, terminal devices with wireless transceiver function and chips that can be set in the aforementioned terminal devices are collectively referred to as terminal devices.

[0089] It should be noted that Figure 1 This is only a schematic diagram, and this application does not specifically limit the type of communication system, or the number and type of devices included in the communication system.

[0090] The present invention provides a method for determining a MIB, which is applicable to Figure 2 The communication system shown is a communication system that operates in the shared frequency bands of U6 GHz (6425 MHz to 7125 MHz) and 52.6 GHz to 71 GHz. Figure 3 As shown, the specific process of the method may include:

[0091] Step 301: The network device determines a synchronization information block, wherein at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB.

[0092] Step 302: The network device sends the synchronization information block to the terminal device.

[0093] Step 303: The terminal device determines whether the MIB is a MIB applied to an unlicensed frequency band based on the at least one field included in the synchronization information block.

[0094] Among them, in this application, whether the MIB is a MIB applied to an unlicensed frequency band can be interpreted in the following three ways: it only indicates whether the MIB is a MIB applied to an unlicensed frequency band; it only indicates whether the MIB is a MIB applied to an authorized frequency band; it indicates whether the MIB is a MIB applied to an unlicensed frequency band or a MIB applied to an authorized frequency band.

[0095] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band according to at least one field in the synchronization information block.

[0096] In an optional implementation, an existing unused field in the MIB, the spare field, can be used to indicate whether the MIB is a MIB applied to an unlicensed frequency band. In one embodiment, if the spare field is empty, it indicates that the MIB is a MIB applied to a licensed frequency band; if the spare field is not empty, it indicates that the MIB is a MIB applied to a licensed frequency band. In another embodiment, the spare field includes one bit, which can be indicated by bit mapping, and the specific method can be:

[0097] When one bit of the spare field is 0, the MIB is a MIB applied to the unlicensed band, otherwise, the MIB is a MIB applied to the licensed band; at this time, when the one bit is 1, or when the one bit is empty, the MIB is a MIB applied to the licensed band.

[0098] When one bit of the spare field is 1, the MIB is a MIB applied to the unlicensed frequency band; otherwise, the MIB is a MIB applied to the licensed frequency band; at this time, when the one bit is 0, or when the one bit is empty, the MIB is a MIB applied to the licensed frequency band.

[0099] Through the above method, the terminal device can determine whether the received MIB is the MIB applied to the unlicensed frequency band according to whether the detected spare field is empty, or according to the specific value of the detected spare field.

[0100] In another optional embodiment, the existing field demodulation reference signal type A position (dmrs-TypeA-Position) in the MIB can be used to indicate whether the MIB is a MIB applied to an unlicensed frequency band. This field indicates the time domain position of the first DMRS on the downlink or uplink. "pos2" means that the first DMRS in the time slot is located on the third OFDM symbol (OFDM symbol #2), and "pos3" means that the first DMRS in the slot is located on the fourth OFDM symbol (OFDM symbol #3). For terminal devices operating on U6GHz, the default time domain position of the first DMRS is "pos2" or "pos3". At this time, the field dmrs-TypeA-Position can be omitted. Therefore, the dmrs-TypeA-Position field can be used to indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0101] In one embodiment, if the dmrs-TypeA-Position field is empty, it indicates that the MIB is a MIB applied to the authorized frequency band; if the dmrs-TypeA-Position field is not empty, it indicates that the MIB is a MIB applied to the authorized frequency band. In another embodiment, the dmrs-TypeA-Position field includes 1 bit and can be indicated by bit-mapping. The specific method can be:

[0102] When one bit of the dmrs-TypeA-Position field is 0, the MIB is a MIB applied to the unlicensed band, otherwise, the MIB is a MIB applied to the authorized band; at this time, when the one bit is 1, or when the one bit is empty, the MIB is a MIB applied to the authorized band.

[0103] When one bit of the dmrs-TypeA-Position field is 1, the MIB is a MIB applied to the unlicensed band; otherwise, the MIB is a MIB applied to the authorized band; at this time, when the one bit is 0, or when the one bit is empty, the MIB is a MIB applied to the authorized band.

[0104] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to the unlicensed frequency band based on whether the dmrs-TypeA-Position field is detected to be empty, or based on the specific value of the detected dmrs-TypeA-Position field.

[0105] In another optional implementation, the existing field synchronization signal subcarrier offset (ssb-SubcarrierOffset) in the MIB can be used to indicate whether the MIB is a MIB applied to an unlicensed frequency band. This field represents the offset of the subcarrier between the SS / PBCH Block and the overlapping CRB, that is, Kssb. For FR1, when the Kssb value demodulated by the terminal device is greater than 24, it means that the terminal device detects that there is no RMSI information with a QCL relationship in the current SS / PBCH Block. However, at the same time, this value may not be provided to the terminal device. The terminal device will derive Kssb based on the frequency domain position between the SS / PBCH Block and PointA, where PointA corresponds to the center point of carrier #0 (i.e., carrier numbered 0) of CRB#0 (i.e., CRB numbered 0). Therefore, for systems operating at U6GHZ and 52.6GHz~71GHz, the ssb-SubcarrierOffset field in the MIB can be used to indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0106] In one embodiment, if the ssb-SubcarrierOffset field is empty, it indicates that the MIB is a MIB applied to the authorized frequency band; if the ssb-SubcarrierOffset field is not empty, it indicates that the MIB is a MIB applied to the authorized frequency band. In another embodiment, the ssb-SubcarrierOffset field includes 4 bits, and the ssb-SubcarrierOffset field can be implemented in the following four ways to indicate whether the MIB is a MIB applied to the unlicensed frequency band:

[0107] Mode a1: The least significant bit (1-bit LSB) of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0108] Mode a2: The most significant bit (1-bit MSB) of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0109] Mode a3: Any one of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0110] Mode a4: At least two bits among the four bits included in the ssb-SubcarrierOffset field jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0111] Exemplarily, in the above-mentioned methods a1-a3, when the least significant bit, the most significant bit, or any bit is 0, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to an authorized band; at this time, when the least significant bit, the most significant bit, or any bit is 1, or when the least significant bit, the most significant bit, or any bit is empty, the MIB is a MIB applied to an authorized band. Or

[0112] When the lowest bit, the highest bit or any bit is 1, the MIB is a MIB applied to the unlicensed frequency band; otherwise, the MIB is a MIB applied to the authorized frequency band; at this time, when the lowest bit, the highest bit or any bit is 0, or when the lowest bit, the highest bit or any bit is empty, the MIB is a MIB applied to the authorized frequency band.

[0113] Exemplarily, in the above-mentioned method a4, at least two of the four bits included in the ssb-SubcarrierOffset field jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band. The specific method may be: indicating whether the MIB is a MIB applied to an unlicensed frequency band by different values ​​composed of at least two bits in the ssb-SubcarrierOffset field. For example, when the two bits in the ssb-SubcarrierOffset field are "01", the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to an authorized frequency band; at this time, when the two bits are "00", "10" or "11", or when the two bits are empty, the MIB is a MIB applied to an authorized frequency band. For another example, when two bits in the ssb-SubcarrierOffset field are "10", the MIB is a MIB applied to the unlicensed frequency band; otherwise, the MIB is a MIB applied to the authorized frequency band; in this case, when the two bits are "01", "00" or "11", or when the two bits are empty, the MIB is a MIB applied to the authorized frequency band. For another example, when three bits in the ssb-SubcarrierOffset field are "001", the MIB is a MIB applied to the unlicensed frequency band; otherwise, the MIB is a MIB applied to the authorized frequency band; in this case, when the three bits are "010", "000", "111", etc., or when the three bits are empty, the MIB is a MIB applied to the authorized frequency band. The above two bits or three bits can be consecutive bits or non-consecutive bits among the four bits included in the ssb-SubcarrierOffset field, and this application does not limit this. Of course, in addition to the above examples, there are many other indication methods, which are not listed here one by one.

[0114] Through the above method, it can be determined whether the received MIB is a MIB applied to the unlicensed frequency band based on whether the detected ssb-SubcarrierOffset field is empty, or based on the specific value of the detected ssb-SubcarrierOffset field.

[0115] In another optional embodiment, the at least one field may include at least two of the spare field, the dmrs-TypeA-Position field, or the ssb-SubcarrierOffset field; in one embodiment, if the at least two fields are empty, it indicates that the MIB is a MIB applied to the licensed frequency band; if the at least two fields are not empty, it indicates that the MIB is a MIB applied to the licensed frequency band. In another embodiment, the bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to the unlicensed frequency band.

[0116] Exemplarily, in the case where the bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band, it can be specifically: by combining the spare field and the 2 bits of the dmrs-TypeA-Position field to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, by combining the spare field and at least 2 bits of the ssb-SubcarrierOffset field to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, by combining the dmrs-TypeA-Position field and at least 2 bits of the ssb-SubcarrierOffset field to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or by combining the spare field, the dmrs-TypeA-Position field and at least 3 bits in the ssb-SubcarrierOffset field to indicate whether the MIB is a MIB applied to an unlicensed frequency band. Specifically, in any of the above-mentioned joint indication methods, the specific value of the combined bit is used to indicate whether the MIB is a MIB applied to the unlicensed frequency band. For example, when the spare field and the two bits of the dmrs-TypeA-Position field are combined to indicate whether the MIB is a MIB applied to the unlicensed frequency band, if the two bits are "01", the MIB is a MIB applied to the unlicensed frequency band, otherwise the MIB is a MIB applied to the authorized frequency band; at this time, if the two bits are "01", "00" or "11", or if the two bits are empty, the MIB is a MIB applied to the authorized frequency band. Of course, there are many other examples, which are not listed here one by one.

[0117] By adopting the MIB determination method provided in the embodiment of the present application, the terminal device can clearly determine whether the received MIB is a MIB applied to the unlicensed frequency band based on the fields in the synchronization information block.

[0118] Based on the above embodiments, the present application also provides a method for determining MIB, which is applicable to Figure 2 The communication system shown is a communication system that operates in the shared frequency bands of U6 GHz (6425 MHz to 7125 MHz) and 52.6 GHz to 71 GHz. Figure 4 As shown, the specific process of the method may include:

[0119] Step 401: The network device determines a synchronization information block, wherein the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band.

[0120] Step 402: The network device sends the synchronization information block to the terminal device.

[0121] Step 403: The terminal device determines whether the MIB is a MIB applied to an unlicensed frequency band based on the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block.

[0122] Through the above method, the terminal device determines whether the received MIB is a MIB applied to the unlicensed frequency band based on the time domain position of at least one item of the PSS, SSS and PBCH information contained in the synchronization information block.

[0123] In a first optional implementation, the time domain position of at least one of the PSS and the SSS may be used to indicate whether the MIB included in the synchronization information block is the MIB applied to the unlicensed frequency band.

[0124] according to Figure 1 As can be seen from the structure of the synchronization information block shown, the synchronization information block currently consists of the PSS, SSS, and PBCH. The PSS and SSS are located on the first OFDM symbol (OFDM symbol #0) and the third OFDM symbol (OFDM symbol #2) of the synchronization information block, respectively, occupying a total of 127 subcarriers in the synchronization information block with subcarrier numbers {56, 57, ... 182} (i.e., subcarrier numbers #56 to #182). Of course, the subcarrier number can also be called the subcarrier number, which is not limited in this application.

[0125] Currently, both PSS and SSS use an M-sequence with a length of 127 and binary phase shift keying (BPSK) modulation. PSS is generated by three cyclic shifts of the BPSK M-sequence. Specifically, the PSS sequence generation formula is as follows:

[0126] dPSS (n) = 1-2x(m)

[0127] in,

[0128] 0≤n<127,

[0129] x(i+7)=(x(i+4)+x(i))mod2,

[0130] [x(6) x(5) x(4) x(3) x(2) x(1)]=[1 1 1 0 1 1 0],

[0131] d PSS (n) is the PSS sequence, x(i) represents the base sequence, i represents the number, and i is greater than or equal to 1.

[0132] The generation formula of SSS sequence is as follows:

[0133] d SSS (n)=[1-2x0((n+m0)mod127)][1-2x1((n+m1)mod127)]

[0134] in,

[0135]

[0136] 0≤n<127,

[0137] x0(i+7)=(x0(i+4)+x0(i))mod2,

[0138] x1(i+7)=(x1(i+4)+x1(i))mod2,

[0139] [x0(6) x0(5) x0(4) x0(3) x0(2) x0(1)]=[0 0 0 0 0 0 1],

[0140] [x1(6) x1(5) x1(4) x1(3) x1(2) x1(1)]=[0 0 0 0 0 0 1],

[0141] d SSS (n) is the SSS sequence, x0(i) and x1(i) represent base sequences respectively, and i represents the number.

[0142] From the generation of the above PSS and SSS sequences, it can be seen that the PSS and SSS sequences are not the same. Therefore, in the first optional implementation, it can be achieved by swapping the positions (or relative positions) of the PSS and SSS in the synchronization information block in the time domain. Specifically, in the first optional implementation, the structure of the synchronization information block can be as follows Figure 5 As shown. Among them, through Figure 5 The sync block shown is the same as Figure 1 It can be seen from the comparison of the synchronization information blocks shown that Figure 5 The positions of PSS and SSS in the time domain are relative to Figure 1 After the swap, the time domain position of the PSS is the third OFDM symbol of the synchronization information block (i.e., OFDM symbol #0), and the time domain position of the SSS is the first OFDM symbol of the synchronization information block (i.e., OFDM symbol #2). At the same time, it can be seen that the frequency domain positions of the swapped PSS and SSS have not changed, and are still the subcarriers with subcarrier numbers {56, 57, ..., 182} in the synchronization information block. Accordingly, Figure 5 Some parameters in table 7.4.3.1-1 of TS38.211 corresponding to the synchronization information block shown can be shown in Table 1 below:

[0143] Table 1

[0144]

[0145] The data in bold italics in Table 1 represent the Figure 1 The parameters corresponding to the synchronization information block shown are modified, that is, the time domain positions of PSS and SSS are modified.

[0146] Specifically, in this first optional embodiment, the time domain position of at least one of the PSS and the SSS is used to indicate whether the MIB included in the synchronization information block is a MIB applied to the unlicensed frequency band, which may specifically include the following cases:

[0147] In the case where the PSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; in this case, in the case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the licensed frequency band; or

[0148] In a case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; in this case, in a case where the PSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to a licensed band; or

[0149] In a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; in this case, in a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to a licensed band; or

[0150] In a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; in this case, in a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to a licensed band; or

[0151] In a case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; in this case, in a case where the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to a licensed frequency band; or

[0152] When the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; at this time, when the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the licensed frequency band.

[0153] In this first optional implementation, the terminal device can detect any of the above situations during the demodulation of the synchronization information block (for example, by an autocorrelation processing method) to determine whether the received MIB is a MIB applied to an unlicensed frequency band. Exemplarily, when the terminal device determines the MIB by comparison and demodulation at a specified location, it can be:

[0154] The terminal device uses the PSS sequence on OFDM symbol #0 to compare or demodulate between subcarrier numbers #56 to #182. If a PSS signal is demodulated, it indicates that the MIB is a MIB applied to the authorized frequency band; otherwise, it indicates that the MIB is a MIB applied to the unlicensed frequency band; or if a PSS signal is demodulated, it indicates that the MIB is a MIB applied to the unlicensed frequency band; otherwise, it indicates that the MIB is a MIB applied to the authorized frequency band;

[0155] Alternatively, the terminal device uses the SSS sequence on OFDM symbol #2 to perform comparison or demodulation between subcarrier numbers #56 to #182. If the SSS signal is demodulated, it indicates that the MIB is a MIB applied to the authorized frequency band; otherwise, it indicates that the MIB is a MIB applied to the unlicensed frequency band; or if the SSS signal is demodulated, it indicates that the MIB is a MIB applied to the unlicensed frequency band; otherwise, it indicates that the MIB is a MIB applied to the authorized frequency band;

[0156] Alternatively, the terminal device uses the PSS sequence and SSS sequence on OFDM symbol #0 and OFDM symbol #2 to compare or demodulate between subcarrier numbers #56 to #182 respectively. If the PSS signal and SSS signal are demodulated respectively, it means that the MIB is the MIB applied to the authorized frequency band, otherwise it means that the MIB is the MIB applied to the unauthorized frequency band; or if the PSS signal and SSS signal are demodulated respectively, it means that the MIB is the MIB applied to the unauthorized frequency band, otherwise it means that the MIB is the MIB applied to the authorized frequency band.

[0157] In a second optional implementation manner, whether the MIB included in the synchronization information block is the MIB applied to the unlicensed frequency band may be indicated by the time domain position of the PBCH information.

[0158] according to Figure 1 It can be seen from the structure of the synchronization information block shown that, at present, the time domain position of the PBCH in the synchronization information block occupies 240 subcarriers on the second OFDM symbol (i.e., OFDM symbol #1) and the fourth OFDM symbol (i.e., OFDM symbol #3) of the synchronization information block, and occupies a total of 96 subcarriers (including subcarrier numbers #0 to #47 and subcarrier numbers #192 to #239) on the third OFDM symbol (i.e., OFDM symbol #2). In this second optional implementation, it can be achieved by changing the time domain position of the PBCH on the third OFDM symbol of the synchronization information block. Specifically, the structure of the synchronization information block after the PBCH time domain position is changed can be as follows: Figure 6 shown.

[0159] in, Figure 6 There are three possible situations included. Figure 6 The synchronization information block shown in (a) is the same as Figure 1 It can be seen from the comparison of the synchronization information blocks shown that Figure 6 The subcarriers with subcarrier numbers {192, 193, ..., 239} on the first OFDM symbol of the synchronization information block in (a) contain part of the PBCH information, and the subcarriers with subcarrier numbers {0, 1, ..., 47} on the third OFDM symbol of the synchronization information block contain part of the PBCH information. Accordingly, Figure 6 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (a) can be shown in Table 2 below:

[0160] Table 2

[0161]

[0162] The data in bold italics in Table 2 represent the Figure 1 The parameters corresponding to the synchronization information block shown in the figure are modified. Specifically, it can be seen from Table 2 that the PBCH information on the first and third OFDM symbols of the synchronization information block has changed. That is, after the change, the subcarriers with subcarrier numbers {192, 193, ..., 239} in the first OFDM symbol of the synchronization information block contain part of the PBCH information, and the subcarriers with subcarrier numbers {0, 1, ..., 47} in the third OFDM symbol of the synchronization information block contain part of the PBCH information. Since the PDCH contains DMRS, the time domain position of the DMRS in the modified PBCH is also changed. After the change, the subcarriers with subcarrier numbers {192+v, 196+v, ..., 236+v} in the first OFDM symbol of the synchronization information block contain part of the DMRS, and the subcarriers with subcarrier numbers {0+v, 4+v, ..., 44+v} in the third OFDM symbol of the synchronization information block contain part of the DMRS. Correspondingly, after the position of the PBCH changes, the position that does not contain any information will also change accordingly. The specific changes are shown in the data corresponding to Set to 0 in Table 2, that is, after the change, the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain any information.

[0163] Figure 6 The synchronization information block shown in (b) is the same as Figure 1 It can be seen from the comparison of the synchronization information blocks shown that Figure 6 The subcarriers with subcarrier numbers {0, 1, ..., 47} on the first OFDM symbol of the synchronization information block in (b) contain part of the PBCH information, and the subcarriers with subcarrier numbers {192, 193, ..., 239} on the third OFDM symbol of the synchronization information block contain part of the PBCH information. Accordingly, Figure 6 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (b) can be shown in Table 3 below:

[0164] Table 3

[0165]

[0166]

[0167] The data in bold italics in Table 3 represent the Figure 1 The parameters corresponding to the synchronization information block shown in FIG3 are modified. Specifically, it can be seen from Table 3 that the PBCH information on the first and third OFDM symbols of the synchronization information block are changed. That is, after the change, the subcarriers with subcarrier numbers {0, 1, ..., 47} in the first OFDM symbol of the synchronization information block contain part of the PBCH information, and the subcarriers with subcarrier numbers {192, 193, ..., 239} in the third OFDM symbol of the synchronization information block contain part of the PBCH information. Similarly, because the PDCH contains DMRS, the time domain position of the DMRS in the modified PBCH is also changed. That is, after the change, the subcarriers with subcarrier numbers {0+v, 4+v, ..., 44+v} in the first OFDM symbol of the synchronization information block contain part of the DMRS, and the subcarriers with subcarrier numbers {192+v, 196+v, ..., 236+v} in the third OFDM symbol of the synchronization information block contain part of the DMRS. Correspondingly, after the position of the PBCH changes, the position that does not contain any information will also change accordingly. The specific changes are shown in the data corresponding to Set to 0 in Table 3, that is, after the change, the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information.

[0168] Figure 6 The synchronization information block shown in (c) is the same as Figure 1 It can be seen from the comparison of the synchronization information blocks shown that Figure 6 The subcarriers with subcarrier numbers {0, 1, ..., 47} on the first OFDM symbol of the synchronization information block in (c) contain part of the PBCH information, and the subcarriers with subcarrier numbers {192, 193, ..., 239} on the first OFDM symbol of the synchronization information block contain part of the PBCH information. Accordingly, Figure 6 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (c) can be shown in Table 4 below:

[0169] Table 4

[0170]

[0171] The data in bold italics in Table 4 represent the Figure 1 The parameters corresponding to the synchronization information block shown are modified. Specifically, it can be seen from Table 4 that the PBCH information on the first OFDM symbol of the synchronization information block is changed. That is, after the change, the subcarriers with subcarrier numbers {0, 1, ..., 47} on the first OFDM symbol of the synchronization information block contain part of the PBCH information, and the subcarriers with subcarrier numbers {192, 193, ..., 239} on the first OFDM symbol of the synchronization information block contain part of the PBCH information. Similarly, since the PDCH contains DMRS, the time domain position of the DMRS in the corresponding modified PBCH is also changed. That is, after the change, the subcarriers with subcarrier numbers {0+v, 4+v, ..., 44+v} on the first OFDM symbol of the synchronization information block contain part of the DMRS, and the subcarriers with subcarrier numbers {192+v, 196+v, ..., 236+v} on the first OFDM symbol of the synchronization information block contain part of the DMRS. Correspondingly, after the position of the PBCH changes, the position that does not contain any information will also change accordingly. The specific changes are shown in the data corresponding to Set to 0 in Table 4, that is, after the change, the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information.

[0172] Among them, the above Tables 2 to 4 involve It is the cell identifier.

[0173] Specifically, in the second optional embodiment, according to the above Figure 6As described in Tables 2 to 4, the time domain position of the PBCH information is used to indicate whether the MIB included in the synchronization information block is a MIB applied to the unlicensed frequency band, which may include the following four methods:

[0174] Method b1: When the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the authorized frequency band; at this time, when the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the authorized frequency band.

[0175] Method b2: When the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the authorized frequency band; at this time, when the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the authorized frequency band.

[0176] Method b3: When the first DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; at this time, when the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the licensed frequency band.

[0177] Method b4: When the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; at this time, when the first DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the licensed frequency band.

[0178] The first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

[0179] Exemplarily, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

[0180] Exemplarily, the third frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0+v, 4+v,…, 44+v}, and the fourth frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192+v, 196+v,…, 236+v}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192+v, 196+v,…, 236+v}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0+v, 4+v,…, 44+v}.

[0181] In this second optional implementation, in the above methods b1 and b2, the terminal device can be implemented by blind detection of PBCH. Specifically, the terminal device can determine whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band by performing energy detection on the PBCH channel at a specified position. In the above methods b3 and b4, the terminal device can be implemented by blind detection of DMRS. Specifically, the terminal device can determine whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band by performing energy detection on the DMRS on the PBCH channel at a specified position or by comparing the DMRS sequence.

[0182] Exemplarily, the terminal device may determine whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band by performing energy detection on a PBCH channel at a specified position, specifically:

[0183] The terminal device performs energy detection on subcarriers #1 to #47 of OFDM symbol #0 and / or subcarriers #192 to #239 of OFDM symbol #0. If PBCH information is detected, it indicates that the MIB is a MIB applied to the authorized frequency band; otherwise, it indicates that the MIB is a MIB applied to the unlicensed frequency band; or if PBCH information is detected, it indicates that the MIB is a MIB applied to the unlicensed frequency band; otherwise, it indicates that the MIB is a MIB applied to the authorized frequency band;

[0184] Alternatively, the terminal device simultaneously performs energy detection on subcarriers #1 to #47 of OFDM symbol #2 and subcarriers #192 to #239 of OFDM symbol #2. If PBCH information is detected at the same time, it indicates that the MIB is the MIB applied to the authorized frequency band, otherwise it indicates that the MIB is the MIB applied to the unauthorized frequency band; or if PBCH information is detected at the same time, it indicates that the MIB is the MIB applied to the unauthorized frequency band, otherwise it indicates that the MIB is the MIB applied to the authorized frequency band.

[0185] Exemplarily, the terminal device may determine whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band by performing energy detection or DMRS sequence comparison on the DMRS on the PBCH channel at a specified position, specifically:

[0186] The terminal device performs energy detection on the subcarriers {0+v, 4+v, ..., 44+v} of OFDM symbol #0 and / or the subcarriers {192+v, 196+v, ..., 236+v} of OFDM symbol #0. If DMRS is detected, it indicates that the MIB is a MIB applied to the licensed frequency band; otherwise, it indicates that the MIB is a MIB applied to the unlicensed frequency band; or if DMRS is detected, it indicates that the MIB is a MIB applied to the unlicensed frequency band; otherwise, it indicates that the MIB is a MIB applied to the licensed frequency band;

[0187] Alternatively, the terminal device simultaneously performs energy detection on the subcarriers {0+v, 4+v, ..., 44+v} of OFDM symbol #2 and the subcarriers {192+v, 196+v, ..., 236+v} of OFDM symbol #2. If DMRS is detected at the same time, it indicates that the MIB is the MIB applied to the authorized frequency band, otherwise it indicates that the MIB is the MIB applied to the unauthorized frequency band; or if DMRS is detected at the same time, it indicates that the MIB is the MIB applied to the unauthorized frequency band, otherwise it indicates that the MIB is the MIB applied to the authorized frequency band.

[0188] In a third optional implementation, the time domain position of the PSS and / or SSS and the time domain position of the PBCH information can be combined to indicate whether the MIB contained in the synchronization information block is the MIB applied to the unlicensed frequency band. That is, it is implemented in combination with the first optional implementation and the second optional implementation mentioned above. That is to say, the positions of the PSS and SSS in the synchronization information block in the time domain are swapped, and the time domain position of the PBCH on the third OFDM symbol of the synchronization information block is also changed. Specifically, the structure of the changed synchronization information block can be as follows Figure 7 shown.

[0189] in, Figure 7 There are three possible situations included. Figure 7 (a) is the first optional embodiment and the above Figure 6 The combination of the methods in (a). In this case, Figure 7 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (a) can be shown in Table 5 below:

[0190] Table 5

[0191]

[0192] The data in bold italics in Table 5 represent the Figure 1 Specifically, the parameter modifications in Table 5 are the superposition of the parameter modifications in Table 1 and Table 2. For details, please refer to the relevant descriptions of Table 1 and Table 2, which will not be described in detail here.

[0193] in, Figure 7 (b) is the first optional implementation method mentioned above and the above Figure 6 (b) is a combination of the methods in this case. Figure 7 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (b) can be shown in Table 6 below:

[0194] Table 6

[0195]

[0196] The data in bold italics in Table 6 represent the Figure 1 Specifically, the parameter modifications in Table 6 are the superposition of the parameter modifications in Table 1 and Table 3. For details, please refer to the relevant descriptions of Table 1 and Table 3, which will not be described in detail here.

[0197] in, Figure 7 (c) is the first optional implementation method mentioned above and the above Figure 6 (c) is a combination of the methods in this case. Figure 7 Some parameters in table 7.4.3.1-1 of TS 38.211 corresponding to the synchronization information block shown in (c) can be shown in Table 7 below:

[0198] Table 7

[0199]

[0200] The data in bold italics in Table 7 represent the Figure 1 Specifically, the parameter modifications in Table 7 are the superposition of the parameter modifications in Table 1 and Table 4. For details, please refer to the relevant descriptions of Table 1 and Table 4, which will not be described in detail here.

[0201] In this third optional implementation, the time domain position of the combined PSS and / or SSS and the time domain position of the PBCH information jointly indicate whether the MIB contained in the synchronization information block is a MIB applied to the unlicensed frequency band, that is, when the judgments in the above-mentioned first optional implementation and the above-mentioned second optional implementation are satisfied at the same time, it can be determined whether the MIB contained in the synchronization information block is a MIB applied to the unlicensed frequency band. Specifically, it can be understood that the method in this third optional implementation can be a combination of all the methods in the above-mentioned second optional implementation. For details, please refer to the relevant descriptions involved above, and they will not be listed here one by one.

[0202] By using the MIB determination method provided in the embodiment of the present application, the terminal device can determine whether the received MIB is a MIB applied to the unlicensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block.

[0203] The present invention provides a method for determining a MIB, which is applicable to Figure 2The communication system shown is a communication system that operates in the shared frequency bands of U6 GHz (6425 MHz to 7125 MHz) and 52.6 GHz to 71 GHz. Figure 8 As shown, the specific process of the method may include:

[0204] Step 801: The network device determines a synchronization information block, wherein the synchronization information block includes at least one field for indicating whether the MIB is a first-type MIB or a second-type MIB, and the at least one field is located in the MIB.

[0205] Step 802: The network device sends the synchronization information block to the terminal device.

[0206] Step 803: The terminal device determines whether the MIB is a first-type MIB or a second-type MIB based on the at least one field included in the synchronization information block.

[0207] The first type of MIB corresponds to the authorized frequency band, and the second type of MIB corresponds to the unlicensed frequency band, or the first type of MIB corresponds to the unlicensed frequency band, and the second type of MIB corresponds to the authorized frequency band. For ease of understanding, the following description is based on the MIB being applied to the unlicensed frequency band or the MIB being applied to the authorized frequency band. That is, the at least one field included in the synchronization information block is used to indicate whether the MIB is applied to the unlicensed frequency band or the MIB is applied to the authorized frequency band.

[0208] Through the above method, the terminal device can clearly determine whether the received MIB is a MIB applicable to an unlicensed frequency band or a MIB applicable to a licensed frequency band according to at least one field in the synchronization information block.

[0209] In an optional implementation, an existing unused field in the MIB, the spare field, can be used to indicate whether the MIB is a MIB for an unlicensed band or a MIB for a licensed band. The spare field includes one bit and can be indicated by bit mapping. The specific method can be:

[0210] When one bit of the spare field is 0, the MIB is a MIB applied to an unlicensed frequency band, that is, the synchronization information block containing the MIB is located in an unlicensed frequency band; when one bit of the spare field is 1, the MIB is a MIB applied to an authorized frequency band, that is, the synchronization information block containing the MIB is located in an authorized frequency band; or

[0211] When one bit of the spare field is 0, the MIB is a MIB applied to the authorized frequency band, that is, the synchronization information block containing the MIB is located in the authorized frequency band; when one bit of the spare field is 1, the MIB is a MIB applied to the unlicensed frequency band, that is, the synchronization information block containing the MIB is located in the unlicensed frequency band.

[0212] Through the above method, the terminal device can determine whether the received MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band according to the specific value of the detected spare field.

[0213] In another optional implementation, the existing field demodulation reference signal type A position (dmrs-TypeA-Position) field in the MIB can be used to indicate whether the MIB is applied to the unlicensed frequency band or the licensed frequency band. For a detailed description of the dmrs-TypeA-Position field, please refer to Figure 3 The relevant descriptions in the embodiment shown are not repeated here. The dmrs-TypeA-Position field includes 1 bit and can be indicated by bit-mapping. The specific method can be:

[0214] When one bit of the dmrs-TypeA-Position field is 0, the MIB is a MIB applied to an unlicensed frequency band, that is, the synchronization information block containing the MIB is located in an unlicensed frequency band; when one bit of the dmrs-TypeA-Position field is 1, the MIB is a MIB applied to an authorized frequency band, that is, the synchronization information block containing the MIB is located in an authorized frequency band; or

[0215] When one bit of the dmrs-TypeA-Position field is 0, the MIB is a MIB applied to the authorized frequency band, that is, the synchronization information block containing the MIB is located in the authorized frequency band; when one bit of the dmrs-TypeA-Position field is 1, the MIB is a MIB applied to the unlicensed frequency band, that is, the synchronization information block containing the MIB is located in the unlicensed frequency band.

[0216] Through the above method, the terminal device can determine whether the received MIB is applied to the unlicensed frequency band or the MIB applied to the licensed frequency band based on the specific value of the detected dmrs-TypeA-Position field.

[0217] In another optional implementation, the existing field synchronization signal subcarrier offset (ssb-SubcarrierOffset) field in the MIB can be used to indicate whether the MIB is applied to the unlicensed frequency band or the licensed frequency band. Specifically, the description of the ssb-SubcarrierOffset field can be found in Figure 3 The relevant descriptions in the embodiment shown are not repeated here. The ssb-SubcarrierOffset field includes 4 bits, and the ssb-SubcarrierOffset field can be implemented in the following four ways to indicate whether the MIB is applied to the unlicensed frequency band or the licensed frequency band:

[0218] Mode c1: The least significant bit (1-bit LSB) of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is applied to an unlicensed frequency band or an MIB applied to a licensed frequency band.

[0219] Mode c2: the most significant bit (1-bit MSB) of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is applied to an unlicensed frequency band or an MIB applied to a licensed frequency band.

[0220] Mode c3: Any one of the four bits included in the ssb-SubcarrierOffset field is used to indicate whether the MIB is applied to an unlicensed frequency band or a licensed frequency band.

[0221] Mode c4: At least two bits of the four bits included in the ssb-SubcarrierOffset field jointly indicate whether the MIB is applied to an unlicensed frequency band or a MIB applied to a licensed frequency band.

[0222] Exemplarily, in the above-mentioned methods c1-c3, when the least significant bit, the most significant bit, or any bit is 0, the MIB is a MIB applied to an unlicensed band; when the least significant bit, the most significant bit, or any bit is 1, the MIB is a MIB applied to a licensed band; or

[0223] When the least significant bit, the most significant bit, or any one of the bits is 0, the MIB is a MIB applied to the authorized frequency band; when the least significant bit, the most significant bit, or any one of the bits is 1, the MIB is a MIB applied to the unlicensed frequency band.

[0224] Exemplarily, in the above-mentioned method c4, at least two of the four bits included in the ssb-SubcarrierOffset field jointly indicate whether the MIB is a MIB for an unlicensed band or a MIB for a licensed band. The specific method may be: different values ​​of at least two bits in the ssb-SubcarrierOffset field are used to indicate whether the MIB is a MIB for an unlicensed band or a MIB for a licensed band. For example, when two bits in the ssb-SubcarrierOffset field are "01", the MIB is a MIB for an unlicensed band or a MIB for a licensed band; for another example, when two bits in the ssb-SubcarrierOffset field are "10", the MIB is a MIB for an unlicensed band or a MIB for a licensed band; for another example, when three bits in the ssb-SubcarrierOffset field are "001", the MIB is a MIB for an unlicensed band or a MIB for a licensed band. The two or three bits may be consecutive or non-consecutive bits of the four bits included in the ssb-SubcarrierOffset field, and this application does not limit this. Of course, in addition to the above examples, there may be many other indication methods, which are not listed here one by one.

[0225] Through the above method, it is possible to determine whether the received MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band according to the specific value of the detected ssb-SubcarrierOffset field.

[0226] In another optional embodiment, the at least one field may include at least two fields of the spare field, the dmrs-TypeA-Position field, or the ssb-SubcarrierOffset field; the bits included in the at least two fields jointly indicate that the MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band.

[0227] Exemplarily, when the bits included in the at least two fields jointly indicate that the MIB is a MIB applied to an unlicensed band or a MIB applied to a licensed band, the specific field combination method is the same as Figure 3The field combination methods involved in the illustrated embodiments are similar and can be referenced to each other, and will not be described in detail here. Specifically, in any joint indication method, the specific value of the combined bit is used to indicate that the MIB is a MIB applied to an unlicensed frequency band, or a MIB applied to an authorized frequency band. For example, by combining the spare field and the 2 bits of the dmrs-TypeA-Position field to indicate that the MIB is a MIB applied to an unlicensed frequency band, or a MIB applied to an authorized frequency band, when the two bits are "01", the MIB is a MIB applied to an unlicensed frequency band, or a MIB applied to an authorized frequency band. Of course, there can be other examples, which are not listed here one by one.

[0228] By adopting the MIB determination method provided in the embodiment of the present application, the terminal device can clearly determine whether the received MIB is a MIB applied to an unlicensed frequency band or a MIB applied to a licensed frequency band based on at least one field in the synchronization information block.

[0229] Based on the above embodiments, the present application also provides a method for determining MIB, which is applicable to Figure 2 The communication system shown is a communication system that operates in the shared frequency bands of U6 GHz (6425 MHz to 7125 MHz) and 52.6 GHz to 71 GHz. Figure 9 As shown, the specific process of the method may include:

[0230] Step 901: The network device determines a synchronization information block, wherein the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a first-type MIB or a second-type MIB.

[0231] Step 902: The network device sends the synchronization information block to the terminal device.

[0232] Step 903: The terminal device determines whether the MIB is a first-type MIB or a second-type MIB based on the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block.

[0233] Through the above method, the terminal device determines whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block.

[0234] In a first optional implementation manner, the time domain position of at least one of the PSS and the SSS may be used to indicate that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band or a MIB applied to an authorized frequency band. Specifically, the specific implementation method of indicating that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band or a MIB applied to an authorized frequency band by using the time domain position of at least one of the PSS and the SSS is the same as Figure 4 The specific implementation methods involved in the first optional implementation in the illustrated embodiment are similar and can be referenced to each other, and will not be described in detail here.

[0235] In a second optional implementation manner, the time domain position of the PBCH information may be used to indicate whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band or a MIB applied to an authorized frequency band. Specifically, the specific implementation method of indicating whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band or a MIB applied to an authorized frequency band by the time domain position of the PBCH information is the same as Figure 4 The specific implementation method in the second optional implementation mode in the illustrated embodiment is similar and can be referred to each other, and will not be described in detail here.

[0236] In a third optional implementation, the time domain position of the PSS and / or SSS and the time domain position of the PBCH information can be combined to indicate that the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band, or a MIB applied to an authorized frequency band. That is, it is implemented in combination with the above-mentioned first optional implementation and the second optional implementation. Specifically, the specific implementation method of jointly indicating that the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band, or a MIB applied to an authorized frequency band by combining the time domain position of the PSS and / or SSS and the time domain position of the PBCH information is the same as Figure 4 The specific implementation method in the third optional implementation mode in the illustrated embodiment is similar, and reference can be made to each other, and will not be described in detail here.

[0237] By using the MIB determination method provided in the embodiment of the present application, the terminal device can clearly determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block.

[0238] Please refer to Figure 12 The present application also provides a method for determining a MIB, which is suitable for Figure 2 The communication system shown can be applied to scenarios in licensed frequency bands or unlicensed frequency bands. The process of the method may include:

[0239] S1200: The network device determines a synchronization information block;

[0240] S1201: The network device sends a synchronization information block to the terminal device. The time domain location of the synchronization information block when the network device operates in the licensed frequency band is different from the time domain location of the synchronization information block when the network device operates in the unlicensed frequency band. This indicates whether the MIB carried in the synchronization information block applies to the licensed frequency band or the unlicensed frequency band. In other words, the time domain location of the synchronization information block can be used to distinguish whether the MIB is a first-class MIB or a second-class MIB.

[0241] Exemplarily, the synchronization information block carrying the first type of MIB and the synchronization information block carrying the second type of MIB can be carried and sent at different time domain positions within a radio frame. The network device can send the synchronization information block in the form of a synchronization information block group, which can be understood as a synchronization signal burst set (SS burst set). The network device sends a group of synchronization information blocks at a time, and the starting position of the following synchronization information block can also be understood as the starting position of the first synchronization information block in a group of synchronization information blocks.

[0242] For example, in method 1, if the synchronization information block is sent on the licensed frequency band, the synchronization information block is sent starting from the first symbol of the first time slot in the first half of the radio frame, that is, starting from the first symbol of the first time slot in the radio frame; if the synchronization information block is sent on the unlicensed frequency band, the synchronization information block is sent starting from the first symbol of the first time slot in the second half of the radio frame. In the unlicensed frequency band scenario, considering the impact of the LBT mechanism, due to the influence of the LBT mechanism, the synchronization information block must be sent only when the channel is idle. The synchronization information block can be sent starting from the third symbol of the first time slot in the second half of the radio frame.

[0243] For example, in method 2, if the sync information block is sent on the licensed band, it begins with the first symbol of the first time slot in the second half of the radio frame. If the sync information block is sent on the unlicensed band, it begins with the first symbol of the first time slot in the first half of the radio frame. In the unlicensed band scenario, to account for the impact of the LBT mechanism, the sync information block can be sent starting with the third symbol of the first time slot in the first half of the radio frame.

[0244] For example, the transmission period of the synchronization information block can be one of {1ms, 10ms, 20ms, 40ms, 80ms, 160ms}. Taking the transmission period of 10ms as an example, it means that a group of synchronization information blocks are sent at a period of 10ms. Within 10ms, the transmission position of the synchronization information block can be flexibly configured.

[0245] S1202: The terminal device receives a synchronization information block from the network device. Based on the time domain position of the synchronization information block, the terminal device can determine whether the MIB carried therein applies to a licensed frequency band or an unlicensed frequency band. In other words, the terminal device can determine whether the MIB is a first-class MIB or a second-class MIB.

[0246] Corresponding to method 1 of S1201, if the synchronization information block is sent on the authorized frequency band, the terminal device assumes that the synchronization information block starts to be sent from the first symbol in the first time slot of the first half frame of the wireless frame, that is, it starts to be sent from the first symbol of the first time slot of the wireless frame, and the terminal device starts to receive the synchronization information block at the corresponding position; if the synchronization information block is sent on the unauthorized frequency band, in the discovery burst transmission window (DBTW), the terminal device assumes that the synchronization information block starts to be sent at the first symbol position in the first time slot of the second half frame of the wireless frame, and the terminal device starts to receive the synchronization information block at the corresponding position.

[0247] Corresponding to method 2 of S1201, if the synchronization information block is sent on the authorized frequency band, the terminal device assumes that the synchronization information block starts to be sent at the first symbol position in the first time slot of the second half frame of the wireless frame, and the terminal device starts to receive the synchronization information block at the corresponding position; if the synchronization information block is sent on the unauthorized frequency band, in the discovery burst transmission window (DBTW), the terminal device assumes that the synchronization information block starts to be sent from the first symbol in the first time slot of the first half frame of the wireless frame, that is, it starts to be sent from the first symbol of the first time slot of the wireless frame, and the terminal device starts to receive the synchronization information block at the corresponding position.

[0248] Please refer to Figure 13 , take method 1 as an example to illustrate. Figure 13As shown, the duration of a radio frame is 10ms, of which the first half of the radio frame is 5ms and includes 5 subframes, namely subframes 1 to 5, corresponding to subframe numbers #0 to #4; the second half of the frame is 5ms and includes 5 subframes, namely subframes 6 to 10, corresponding to subframe numbers #5 to #9. In the scenario of the licensed frequency band, the synchronization information block is located in the first half of the radio frame, that is, the synchronization information block is sent in the first half of the radio frame, and the synchronization information block is not sent in the second half of the radio frame. In the scenario of the unlicensed frequency band, the synchronization information block is located in the second half of the radio frame, for example, the synchronization information block is sent in the second half of the radio frame, and the synchronization information block is not sent in the first half of the radio frame. It can be understood that due to the influence of the LBT mechanism, the synchronization information block must be sent only when the channel is idle. Therefore, in the scenario of the unlicensed frequency band, the network device begins to send synchronization information after a certain interval of symbols from the beginning of the second half of the radio frame.

[0249] For example, the subcarrier spacing of the synchronization information block is 960kHz, that is, the subcarrier spacing of the frequency domain resources used to carry the synchronization information block is 960kHz. Figure 14 A radio frame is 10ms, and a radio frame includes 10 subframes, with each subframe being 1ms. The first half of the radio frame includes the first five subframes, i.e., subframes 1 to 5, with corresponding subframe numbers #0 to #4; the second half of the radio frame includes the last five subframes, i.e., subframes 6 to 10, with corresponding subframe numbers #5 to #9. A subframe contains 64 time slots. The first half of the subframe is 0.5ms and includes the first 32 time slots, i.e., slots 1 to 32, with corresponding time slot numbers #0 to #31; the second half of the subframe is 0.5ms and includes the last 32 time slots, i.e., slots 33 to 64, with corresponding time slot numbers #32 to #61; a time slot contains 14 symbols, with corresponding symbol numbers #0 to #13.

[0250] The following are some example configurations:

[0251] Configuration 1:

[0252] In licensed frequency band scenarios, a network device may transmit a set of synchronization information blocks in the first half of a subframe in the first half of a radio frame, for example, starting with the first symbol of the first half of the subframe. Depending on the number of synchronization information blocks to be transmitted, the network device may transmit the synchronization information blocks in the first half of each subframe in the first half of a radio frame, or in the first half of some subframes in the first half of a radio frame.

[0253] Accordingly, for the terminal device, the terminal device defaults to sending the synchronization information block from a predetermined symbol position of the first half subframe of a subframe in the first half frame of a wireless frame. For example, the predetermined symbol may be the first symbol. The present application does not make a specific limitation on the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the wireless frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block. Synchronization information block Synchronization information block

[0254] In the scenario of an unlicensed frequency band, a set of synchronization information blocks to be sent can be sent in the second half of a subframe in the first half of a radio frame. It is understandable that in the scenario of an unlicensed frequency band, the network device monitors the channel before sending the synchronization information block, and sends the synchronization information block after the monitoring is successful. In this case, the starting symbol for the network device to send the synchronization information block is not necessarily the first symbol in the second half of the subframe, for example, it can be the third symbol in the second half of the subframe. Depending on the number of synchronization information blocks to be sent, the network device can send the synchronization information block in the second half of each subframe in the first half of a radio frame, or the network device can send the synchronization information block in the second half of some subframes in the first half of a radio frame.

[0255] Accordingly, in the scenario of unlicensed frequency bands, for terminal devices, the terminal device defaults to sending the synchronization information block from a predetermined symbol position in the second half of a subframe in the first half of a wireless frame. For example, the predetermined symbol can be the first symbol, the third symbol, etc. This application does not make a specific limitation on the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the wireless frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block. Synchronization information block Synchronization information block

[0256] Please refer to Figure 14 In the scenario of the licensed frequency band, a group of synchronization information blocks starts to be sent from the first symbol of the first time slot of the first subframe of the first half frame of the wireless frame; in the scenario of the unlicensed frequency band, since LBT occupies a certain amount of time domain resources, a group of synchronization information blocks starts to be sent from the third symbol of the first time slot of the first subframe of the second half frame of the wireless frame.

[0257] Configuration 2:

[0258] In licensed frequency band scenarios, a network device may send a set of synchronization information blocks in the second half of a subframe in the first half of a radio frame, for example, starting with the first symbol of the second half of the subframe. Depending on the number of synchronization information blocks to be sent, the network device may send the synchronization information blocks in the second half of each subframe in the first half of a radio frame, or in the second half of some subframes in the first half of a radio frame.

[0259] Accordingly, for the terminal device, the terminal device defaults to sending the synchronization information block starting from the first symbol position of the second half subframe of a subframe within the first half frame of a radio frame. After receiving the synchronization information block, the terminal device can determine the time domain position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0260] In the scenario of an unlicensed frequency band, a set of synchronization information blocks to be sent can be sent in the first half of a subframe of the first half of a radio frame. It is understandable that in the scenario of an unlicensed frequency band, the network device monitors the channel before sending the synchronization information block, and sends the synchronization information block after the monitoring is successful. In this case, the starting symbol for the network device to send the synchronization information block is not necessarily the first symbol of the first half of the subframe, and can be, for example, the third symbol of the first half of the subframe. Depending on the number of synchronization information blocks to be sent, the network device can send the synchronization information block in the first half of each subframe in the first half of a radio frame, or the network device can send the synchronization information block in the first half of some subframes in the first half of a radio frame.

[0261] Accordingly, in the scenario of an unlicensed frequency band, for a terminal device, the terminal device defaults to sending a synchronization information block starting from a predetermined symbol position in the first half of a subframe in the first half of a radio frame. For example, the predetermined symbol may be the first symbol, the third symbol, etc. This application does not make any specific restrictions on the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0262] Configuration 3:

[0263] In licensed frequency band scenarios, a network device may transmit a set of synchronization information blocks in the first half of a subframe in the second half of a radio frame, for example, starting with the first symbol of the first half of the subframe. Depending on the number of synchronization information blocks to be transmitted, the network device may transmit the blocks in the first half of each subframe in the second half of a radio frame, or in the first half of some subframes in the second half of a radio frame.

[0264] Accordingly, for the terminal device, the terminal device defaults to sending the synchronization information block starting from a predetermined symbol position in the first half of a subframe in the second half of a radio frame. For example, the predetermined symbol may be the first symbol. This application does not specifically limit the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0265] In the scenario of an unlicensed frequency band, a set of synchronization information blocks to be sent can be sent in the second half of a subframe in the second half of a radio frame. It is understandable that in the scenario of an unlicensed frequency band, the network device monitors the channel before sending the synchronization information block, and sends the synchronization information block after the monitoring is successful. In this case, the starting symbol for the network device to send the synchronization information block is not necessarily the first symbol in the second half of the subframe, and can be, for example, the third symbol in the second half of the subframe. Depending on the number of synchronization information blocks to be sent, the network device can send the synchronization information block in the second half of each subframe in the second half of a radio frame, or the network device can send the synchronization information block in the second half of some subframes in the second half of a radio frame.

[0266] Accordingly, in the scenario of an unlicensed frequency band, for a terminal device, the terminal device defaults to sending a synchronization information block starting from a predetermined symbol position of the second half of a subframe in the second half of a radio frame. For example, the predetermined symbol may be the first symbol, the third symbol, etc. This application does not make a specific limitation on the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0267] Configuration 4:

[0268] In licensed frequency band scenarios, a network device may transmit a set of synchronization information blocks in the second half of a subframe in the second half of a radio frame, for example, starting from the first symbol of the second half of the subframe. Depending on the number of synchronization information blocks to be transmitted, the network device may transmit the synchronization information blocks in the second half of each subframe in the second half of a radio frame, or in the second half of some subframes in the second half of a radio frame.

[0269] Accordingly, for the terminal device, the terminal device defaults to sending the synchronization information block starting from the first symbol position of the second half subframe of a subframe within the second half of a radio frame. After receiving the synchronization information block, the terminal device can determine the time domain position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0270] In the unlicensed band scenario, a set of synchronization information blocks to be sent can be sent in the first half of a subframe in the second half of a radio frame. It is understandable that in the unlicensed band scenario, the network device monitors the channel before sending the synchronization information block, and sends the synchronization information block after the monitoring is successful. In this case, the starting symbol for the network device to send the synchronization information block is not necessarily the first symbol in the first half of the subframe, and can be, for example, the third symbol in the first half of the subframe. Depending on the number of synchronization information blocks to be sent, the network device can send the synchronization information block in the first half of each subframe in the second half of a radio frame, or the network device can send the synchronization information block in the first half of some subframes in the second half of a radio frame.

[0271] Accordingly, in the scenario of an unlicensed frequency band, for a terminal device, the terminal device defaults to sending a synchronization information block starting from a predetermined symbol position of the first half of a subframe in the second half of a radio frame. For example, the predetermined symbol may be the first symbol, the third symbol, and so on. This application does not make any specific restrictions on the predetermined symbol position. In short, the terminal device can understand where the synchronization information block starts to be sent. After receiving the synchronization information block, the terminal device can determine the position of the received synchronization information block in the radio frame, or it can be understood as determining / obtaining the timing information of the received synchronization information block.

[0272] Through the above method, the terminal device can determine whether the received MIB is applied to the unlicensed frequency band or the licensed frequency band according to the time domain position of the synchronization information block, thereby saving signaling overhead and improving access efficiency.

[0273] Based on the above embodiments, the present application also provides a device for determining MIB. Figure 10As shown, the MIB determination device 1000 may include a transceiver unit 1001 and a processing unit 1002. The transceiver unit 1001 is used for the MIB determination device 1000 to receive data (messages, signals, or information, etc.) or send data (messages, signals, or information, etc.), and the processing unit 1002 is used to control and manage the actions of the MIB determination device 1000. The processing unit 1002 may also control the steps performed by the transceiver unit 1001.

[0274] Exemplarily, the MIB determination device 1000 can be the terminal device in the above-mentioned embodiment, the processor in the terminal device, or the chip or chip system, or a functional module, etc.; or, the MIB determination device 1000 can be the network device in the above-mentioned embodiment, the processor of the network device, or the chip or chip system, or a functional module, etc.

[0275] In one embodiment, the MIB-determined device 1000 is used to implement the above Figure 3 The functions of the network device in the embodiment shown may further include:

[0276] The processing unit 1002 is used to determine a synchronization information block, wherein at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; the transceiver unit 1001 is used to send a synchronization information block to the terminal device.

[0277] In one embodiment, the MIB-determined device 1000 is used to implement the above Figure 3 The functions of the terminal device in the embodiment shown may further include:

[0278] The transceiver unit 1001 is used to receive a synchronization information block from a network device, where at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; the processing unit 1002 is used to determine whether the MIB is a MIB applied to an unlicensed frequency band based on the at least one field contained in the synchronization information block.

[0279] In an optional embodiment, the at least one field is a spare field, and the spare field includes one bit; when the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band.

[0280] In another optional embodiment, the at least one field is a demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; when the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; when the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band.

[0281] In another optional embodiment, the at least one field is a synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; the least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, the most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, any one bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or, at least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0282] Specifically, when the lowest bit, the highest bit or any bit is 0, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the authorized frequency band; or, when the lowest bit, the highest bit or any bit is 1, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the authorized frequency band.

[0283] In another optional embodiment, the at least one field includes at least two fields of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; the bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

[0284] In one embodiment, the MIB-determined device 1000 is used to implement the above Figure 4 The functions of the network device in the embodiment shown may further include:

[0285] The processing unit 1002 is used to determine a synchronization information block, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band; the transceiver unit 1001 is used to send a synchronization information block to a terminal device.

[0286] In one embodiment, the MIB-determined device 1000 is used to implement the above Figure 4 The functions of the terminal device in the embodiment shown may further include:

[0287] The transceiver unit 1001 is used to receive a synchronization information block from a network device, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band; the processing unit 1002 is used to determine whether the MIB is a MIB applied to an unlicensed frequency band based on the time domain position of at least one of the PSS, SSS and PBCH information contained in the synchronization information block.

[0288] In an optional embodiment, the time domain position of at least one of the PSS and the SSS is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band, including: when the PSS is located on the first orthogonal frequency division multiplexing OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band, otherwise, the MIB is a MIB applied to an authorized frequency band; or, when the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band; or, in the case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band; or, in the case where the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band, otherwise, the MIB is the MIB applied to the licensed frequency band.

[0289] In another optional embodiment, the time domain position of the PBCH information is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band, including: when the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or, when the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the third OFDM symbol of the synchronization information block. In the case of the second frequency domain position on the OFDM symbol, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; or, in the case where the first demodulation reference signal DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; or, in the case where the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band; wherein the first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

[0290] Exemplarily, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

[0291] Exemplarily, the third frequency domain position includes the subcarrier number of the synchronization information block as {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier number of the synchronization information block as {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier number of the synchronization information block as {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier number of the synchronization information block as {0+v, 4+v, ..., 44+v}; wherein, It is the cell identifier.

[0292] Specifically, the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbered {48, 49, ..., , 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block does not contain information; the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

[0293] In one embodiment, the MIB determination device 1000 is used to implement the above Figure 8 The functions of the network device in the embodiment described above may specifically include:

[0294] The processing unit 1002 is used to determine a synchronization information block, wherein at least one field contained in the synchronization information block is used to indicate that the MIB is a first-category MIB or a second-category MIB; wherein the at least one field is located in the MIB; the first-category MIB corresponds to an authorized frequency band, and the second-category MIB corresponds to an unauthorized frequency band, or the first-category MIB corresponds to an unauthorized frequency band, and the second-category MIB corresponds to an authorized frequency band; the transceiver unit 1001 is used to send a synchronization information block to the terminal device.

[0295] In one embodiment, the MIB determination device 1000 is used to implement the above Figure 8 The functions of the terminal device in the embodiment described above may specifically include:

[0296] The transceiver unit 1001 is used to receive a synchronization information block from a network device, and at least one field contained in the synchronization information block is used to indicate that the MIB is a first-class MIB or a second-class MIB; wherein the at least one field is located in the MIB; the first-class MIB corresponds to an authorized frequency band, and the second-class MIB corresponds to an unauthorized frequency band, or the first-class MIB corresponds to an unauthorized frequency band, and the second-class MIB corresponds to an authorized frequency band; the processing unit 1002 is used to determine whether the MIB is a first-class MIB or a second-class MIB based on the at least one field contained in the synchronization information block.

[0297] In an optional implementation, the at least one field is a spare field, and the spare field includes one bit; when the one bit is 0, the MIB is a first-type MIB; when the one bit is 1, the MIB is a second-type MIB.

[0298] In another optional embodiment, the at least one field is a demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; when the one bit is 0, the MIB is a first type MIB; when the one bit is 1, the MIB is a second type MIB.

[0299] In another optional embodiment, the at least one field is a synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; the lowest bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, the highest bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, any one bit of the four bits is used to indicate that the MIB is a first-class MIB or a second-class MIB; or, at least two bits of the four bits jointly indicate that the MIB is a first-class MIB or a second-class MIB.

[0300] Specifically, when the least significant bit, the most significant bit, or any bit is 0, the MIB is a first-type MIB; when the least significant bit, the most significant bit, or any bit is 1, the MIB is a second-type MIB.

[0301] In another optional embodiment, the at least one field includes at least two fields of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; the bits included in the at least two fields jointly indicate that the MIB is a first-class MIB or a second-class MIB.

[0302] In one embodiment, the MIB determination device 1000 is used to implement the above Figure 9 The functions of the network device in the embodiment described above may specifically include:

[0303] The processing unit 1002 is used to determine a synchronization information block, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate that the MIB contained in the synchronization information block is a first type MIB or a second type MIB; wherein the first type MIB corresponds to an authorized frequency band, and the second type MIB corresponds to an unauthorized frequency band, or the first type MIB corresponds to an unauthorized frequency band, and the second type MIB corresponds to an authorized frequency band; the transceiver unit 1001 is used to send the synchronization information block to the terminal device.

[0304] In one embodiment, the MIB determination device 1000 is used to implement the above Figure 9 The functions of the terminal device in the embodiment described above may specifically include:

[0305] The transceiver unit 1001 is used to receive a synchronization information block from a network device, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate that the MIB contained in the synchronization information block is a first-class MIB or a second-class MIB; wherein, the first-class MIB corresponds to an authorized frequency band, and the second-class MIB corresponds to an unauthorized frequency band, or, the first-class MIB corresponds to an unauthorized frequency band, and the second-class MIB corresponds to an authorized frequency band; the processing unit 1002 is used to determine whether the MIB is a first-class MIB or a second-class MIB based on the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block.

[0306] In an optional embodiment, the time domain position of at least one of the PSS and the SSS is used to indicate that the MIB contained in the synchronization information block is a first-type MIB or a second-type MIB, including: when the PSS is located on the first orthogonal frequency division multiplexing OFDM symbol of the synchronization information block, the MIB is a first-type MIB; when the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a second-type MIB; and / or, when the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a first-type MIB; when the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a second-type MIB.

[0307] In another optional embodiment, the time domain position of the PBCH information is used to indicate that the MIB contained in the synchronization information block is a first type MIB or a second type MIB, including: when the first PBCH information is located at the first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at the second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a first type MIB; when the first PBCH information is located at the first frequency domain position on the third OFDM symbol of the synchronization information block, and the second PBCH information is located at the second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a second type MIB; or, when the first demodulation reference signal DMRS is located at the third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at the fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a first type MIB; when the first DMRS is located at the third frequency domain position on the third OFDM symbol of the synchronization information block, and the second DMRS is located at the third OFDM symbol of the synchronization information block. In the case of a fourth frequency domain position on the symbol, the MIB is a second type MIB; wherein the first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

[0308] Exemplarily, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

[0309] Exemplarily, the third frequency domain position includes the subcarrier number of the synchronization information block as {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier number of the synchronization information block as {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier number of the synchronization information block as {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier number of the synchronization information block as {0+v, 4+v, ..., 44+v}; wherein, It is the cell identifier.

[0310] Specifically, the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbered {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarrier numbered {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbered {48, 49, ..., , 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block does not contain information; the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or, the subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

[0311] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. The functional units in the embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0312] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0313] Based on the above embodiments, the present application also provides a device for determining MIB. Figure 11 As shown, the MIB determination device 1100 may include a transceiver 1101 and a processor 1102. Optionally, the MIB determination device 1100 may further include a memory 1103. The memory 1103 may be disposed within the MIB determination device 1100 or may be disposed externally thereto. The processor 1102 may control the transceiver 1101 to receive and send data.

[0314] Specifically, the processor 1102 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 1102 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0315] The transceiver 1101, the processor 1102, and the memory 1103 are interconnected. Optionally, the transceiver 1101, the processor 1102, and the memory 1103 are interconnected via a bus 1104; the bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0316] In an optional embodiment, the memory 1103 is used to store programs, etc. Specifically, the programs may include program code, which includes computer operating instructions. The memory 1103 may include RAM, or may also include non-volatile memory, such as one or more disk storage devices. The processor 1102 executes the application stored in the memory 1103 to implement the above functions, thereby realizing the functions of the MIB determination device 1100.

[0317] Exemplarily, the MIB determination device 1100 may be the terminal device in the above embodiment, or may be the network device in the above embodiment.

[0318] In one embodiment, the MIB determination device 1100 is implemented Figure 3 In the embodiment shown, the transceiver 1101 can realize the functions of the network device. Figure 3 The transceiver operations performed by the network device in the embodiment shown; the processor 1102 can implement Figure 3 In the embodiment shown, the network device performs other operations besides the sending and receiving operations. Figure 3 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0319] In another embodiment, the MIB determination device 1100 is implemented Figure 3 In the embodiment shown, the transceiver 1101 can realize the functions of the terminal device. Figure 3 The sending and receiving operations performed by the terminal device in the embodiment shown; the processor 1102 can implement Figure 3 In the embodiment shown, other operations other than the sending and receiving operations are performed by the terminal device. For specific related details, please refer to the above Figure 3The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0320] In another embodiment, the MIB determination device 1100 is implemented Figure 4 In the embodiment shown, the transceiver 1101 can realize the functions of the network device. Figure 4 The transceiver operations performed by the network device in the embodiment shown; the processor 1102 can implement Figure 4 In the embodiment shown, the network device performs other operations besides the sending and receiving operations. Figure 4 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0321] In another embodiment, the MIB determination device 1100 is implemented Figure 4 In the embodiment shown, the transceiver 1101 can realize the functions of the terminal device. Figure 4 The sending and receiving operations performed by the terminal device in the embodiment shown; the processor 1102 can implement Figure 4 In the embodiment shown, other operations other than the sending and receiving operations are performed by the terminal device. For specific related details, please refer to the above Figure 4 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0322] In one embodiment, the MIB determination device 1100 is implemented Figure 8 In the embodiment shown, the transceiver 1101 can realize the functions of the network device. Figure 8 The transceiver operations performed by the network device in the embodiment shown; the processor 1102 can implement Figure 8 In the embodiment shown, the network device performs other operations besides the sending and receiving operations. Figure 8 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0323] In another embodiment, the MIB determination device 1100 is implemented Figure 8 In the embodiment shown, the transceiver 1101 can realize the functions of the terminal device. Figure 8 The sending and receiving operations performed by the terminal device in the embodiment shown; the processor 1102 can implement Figure 8 In the embodiment shown, other operations other than the sending and receiving operations are performed by the terminal device. For specific related details, please refer to the above Figure 8 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0324] In another embodiment, the MIB determination device 1100 is implemented Figure 9In the embodiment shown, the transceiver 1101 can realize the functions of the network device. Figure 9 The transceiver operations performed by the network device in the embodiment shown; the processor 1102 can implement Figure 9 In the embodiment shown, the network device performs other operations besides the sending and receiving operations. Figure 9 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0325] In another embodiment, the MIB determination device 1100 is implemented Figure 9 In the embodiment shown, the transceiver 1101 can realize the functions of the terminal device. Figure 9 The sending and receiving operations performed by the terminal device in the embodiment shown; the processor 1102 can implement Figure 9 In the embodiment shown, other operations other than the sending and receiving operations are performed by the terminal device. For specific related details, please refer to the above Figure 9 The relevant descriptions in the illustrated embodiments will not be described in detail here.

[0326] Based on the above embodiments, an embodiment of the present application provides a communication system, which may include the terminal equipment and network equipment involved in the above embodiments.

[0327] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a computer, the computer can implement the MIB determination method provided in the above method embodiment.

[0328] An embodiment of the present application further provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the MIB determination method provided in the above method embodiment.

[0329] An embodiment of the present application further provides a chip, which is coupled to a memory and is used to implement the MIB determination method provided in the above method embodiment.

[0330] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0331] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0332] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0333] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0334] Obviously, those skilled in the art may make various modifications and variations to this application without departing from the scope of protection of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0335] A method for distinguishing between new and old MIBs. For systems operating in licensed frequency bands, a group of SSB burst sets is sent in the first half of a radio frame. For systems operating in unlicensed frequency bands, a group of SSB burst sets is sent in the second half of a radio frame.

[0336] In systems operating in licensed bands, the UE defaults to starting the SSB at the first symbol position in the first slot of the first half of a radio frame. In systems operating in unlicensed bands, during the discovery burst transmission window (DBTW), the UE defaults to starting the SSB transmission at the first symbol position in the first slot of the second half of a radio frame. Alternatively, in systems operating in licensed bands, the UE defaults to starting the SSB transmission at the first symbol position in the first slot of the second half of a radio frame. In systems operating in unlicensed bands, during the discovery burst transmission window (DBTW), the UE defaults to starting the SSB transmission at the first symbol position in the first slot of the first half of a radio frame.

[0337] For example, Figure 15 As shown, a group of SSB burst sets in the licensed band system is sent in the first half of each radio frame, and the SSB in the unlicensed band system is sent in the second half of each radio frame.

[0338] Alternatively, when the subcarrier spacing of SSB is 960 kHz, for a system operating in a licensed band, a group of SSB burst sets may be sent in the first half of each subframe in the first half of a radio frame, while for a system operating in an unlicensed band, a group of SSB burst sets may be sent in the second half of each subframe in the first half of a radio frame, or a group of SSB burst sets may be sent in the first half of each subframe in the second half of a radio frame, and a group of SSB burst sets may be sent in the second half of each subframe in the second half of a radio frame;

[0339] Alternatively, when the subcarrier spacing of SSB is 960 kHz, for a system operating in a licensed band, a group of SSB burst sets may be sent in the second half of each subframe in the first half of a radio frame, while for a system operating in an unlicensed band, a group of SSB burst sets may be sent in the first half of each subframe in the first half of a radio frame, or a group of SSB burst sets may be sent in the first half of each subframe in the second half of a radio frame, and a group of SSB burst sets may be sent in the second half of each subframe in the second half of a radio frame;

[0340] Alternatively, when the subcarrier spacing of SSB is 960 kHz, for a system operating in a licensed band, a group of SSB burst sets may be sent in the first half of each subframe in the second half of a radio frame, while for a system operating in an unlicensed band, a group of SSB burst sets may be sent in the first half of each subframe in the first half of a radio frame, or a group of SSB burst sets may be sent in the second half of each subframe in the first half of a radio frame, and a group of SSB burst sets may be sent in the second half of each subframe in the second half of a radio frame;

[0341] Alternatively, when the subcarrier spacing of SSB is 960kHz, for a system operating in a licensed frequency band, a group of SSB burst sets may be sent in the second half of each subframe in the second half of a radio frame, while for a system operating in an unlicensed frequency band, a group of SSB burst sets may be sent in the first half of each subframe in the first half of a radio frame, or, a group of SSB burst sets may be sent in the second half of each subframe in the first half of a radio frame, and a group of SSB burst sets may be sent in the first half of each subframe in the second half of a radio frame.

[0342] For systems operating in licensed bands, the UE defaults to starting the SSB at the first symbol position of the first half subframe of each subframe in the first half of a radio frame. For systems operating in unlicensed bands, in the discovery burst transmission window (DBTW), the UE defaults to starting the SSB at the first symbol position of the second half subframe of each subframe in the first half of a radio frame, or, the UE defaults to starting the SSB at the first symbol position of the first half subframe of each subframe in the second half of a radio frame, or, the UE defaults to starting the SSB at the first symbol position of the second half subframe of each subframe in the second half of a radio frame.

[0343] Alternatively, in a system operating in a licensed band, the UE defaults to the SSB starting at the first symbol position of the second half subframe of each subframe in the first half of a radio frame; in a system operating in an unlicensed band, in a discovery burst transmission window (DBTW), the UE defaults to the SSB starting at the first symbol position of the first half subframe of each subframe in the first half of a radio frame, or, the UE defaults to the SSB starting at the first symbol position of the first half subframe of each subframe in the second half of a radio frame, or, the UE defaults to the SSB starting at the first symbol position of the second half subframe of each subframe in the second half of a radio frame;

[0344] Alternatively, in a system operating in a licensed band, the UE defaults to the SSB starting at the first symbol position of the first half subframe in each subframe in the second half of a radio frame; in a system operating in an unlicensed band, in a discovery burst transmission window (DBTW), the UE defaults to the SSB starting at the first symbol position of the first half subframe in each subframe in the first half of a radio frame, or the UE defaults to the SSB starting at the first symbol position of the second half subframe in each subframe in the first half of a radio frame, or the UE defaults to the SSB starting at the first symbol position of the second half subframe in each subframe in the second half of a radio frame;

[0345] Alternatively, for a system operating in an authorized frequency band, the UE defaults to the SSB starting from the first symbol position of the second half subframe in each subframe in the second half of a radio frame; for a system operating in an unlicensed frequency band, in a discovery burst transmission window (DBTW), the UE defaults to the SSB starting from the first symbol position of the first half subframe in each subframe in the first half of a radio frame, or the UE defaults to the SSB starting from the first symbol position of the second half subframe in each subframe in the first half of a radio frame, or the UE defaults to the SSB starting from the first symbol position of the first half subframe in each subframe in the second half of a radio frame.

[0346] For example, Figure 16 As shown, a group of SSB burst sets in the licensed band system is located in the first half of each subframe in the first half of a radio frame and is transmitted, and the SSB in the unlicensed band system is located in the first half of each subframe in the second half of a radio frame and is transmitted.

[0347] At this time, the SSB period is {1ms, 10ms, 20ms, 40ms, 80ms, 160ms}.

Claims

1. A method for determining a master information block (MIB), characterized in that: include: The network device sends a synchronization information block to the terminal device, wherein at least one field included in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; The at least one field includes at least one of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field.

2. The method according to claim 1, wherein The at least one field is the spare field, and the spare field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

3. The method according to claim 1, wherein The at least one field is the demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

4. The method according to claim 1, wherein The at least one field is the synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; The least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or The most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or Any one of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or At least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

5. The method according to claim 4, wherein When the least significant bit, the most significant bit, or any of the bits is 0, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the least significant bit, the most significant bit, or any of the bits is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

6. The method according to claim 1, wherein The at least one field includes at least two fields of the spare field, the demodulation reference signal type A position field, or the synchronization signal subcarrier offset field; The bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

7. A method for determining a master information block (MIB), characterized in that: include: The terminal device receives a synchronization information block from the network device, where at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; wherein the at least one field includes at least one field of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; The terminal device determines whether the MIB is a MIB applied to an unlicensed frequency band based on the at least one field included in the synchronization information block.

8. The method according to claim 7, wherein The at least one field is the spare field, and the spare field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

9. The method according to claim 7, wherein The at least one field is the demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

10. The method according to claim 7, wherein The at least one field is the synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; The least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or The most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or Any one of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or At least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

11. The method according to claim 10, wherein When the least significant bit, the most significant bit, or any of the bits is 0, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the least significant bit, the most significant bit, or any of the bits is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

12. The method according to claim 7, wherein The at least one field includes at least two fields of the spare field, the demodulation reference signal type A position field, or the synchronization signal subcarrier offset field; The bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

13. A method for determining a master information block (MIB), characterized in that: include: The network device sends a synchronization information block to the terminal device, and the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is the MIB applied to the unlicensed frequency band.

14. The method according to claim 13, wherein The time domain position of at least one of the PSS and the SSS is used to indicate whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the PSS is located on the first orthogonal frequency division multiplexing (OFDM) symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band.

15. The method according to any one of claims 13 to 14, wherein: The time domain position of the PBCH information is used to indicate whether the MIB included in the synchronization information block is a MIB applied to the unlicensed frequency band, including: In a case where the first PBCH information is located at a first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at a second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first PBCH information is located at a first frequency domain position on a third OFDM symbol of the synchronization information block, and the second PBCH information is located at a second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or In a case where the first demodulation reference signal DMRS is located at a third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at a fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first DMRS is located at a third frequency domain position on a third OFDM symbol of the synchronization information block, and the second DMRS is located at a fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; The first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

16. The method according to claim 15, wherein The first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

17. The method according to claim 15, wherein The third frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}; in, It is the cell identifier.

18. The method according to claim 15, wherein The subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55} and subcarrier numbers {183, 184, ..., 192} in the first OFDM symbol of the synchronization information block do not contain information; the subcarriers with subcarrier numbers {0, 1, ..., 55} and subcarrier numbers {183, 184, ..., 239} in the third OFDM symbol of the synchronization information block do not contain information; or The subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

19. A method for determining a master information block (MIB), characterized in that: include: The terminal device receives a synchronization information block from the network device, where the time domain position of at least one of the primary synchronization signal PSS, the secondary synchronization signal SSS, and the physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to the unlicensed frequency band; The terminal device determines whether the MIB is a MIB applied to an unlicensed frequency band based on the time domain position of at least one item of PSS, SSS and PBCH information contained in the synchronization information block.

20. The method according to claim 19, wherein The time domain position of at least one of the PSS and the SSS is used to indicate whether the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the PSS is located on the first orthogonal frequency division multiplexing (OFDM) symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band.

21. The method according to any one of claims 19-20, characterized in that The time domain position of the PBCH information is used to indicate whether the MIB included in the synchronization information block is a MIB applied to the unlicensed frequency band, including: In a case where the first PBCH information is located at a first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at a second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first PBCH information is located at a first frequency domain position on a third OFDM symbol of the synchronization information block, and the second PBCH information is located at a second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or In a case where the first demodulation reference signal DMRS is located at a third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at a fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first DMRS is located at a third frequency domain position on a third OFDM symbol of the synchronization information block, and the second DMRS is located at a fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; The first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

22. The method according to claim 21, wherein The first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

23. The method according to claim 21, wherein The third frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}; in, It is the cell identifier.

24. The method of claim 21, wherein: The subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55} and subcarrier numbers {183, 184, ..., 192} in the first OFDM symbol of the synchronization information block do not contain information; the subcarriers with subcarrier numbers {0, 1, ..., 55} and subcarrier numbers {183, 184, ..., 239} in the third OFDM symbol of the synchronization information block do not contain information; or The subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

25. A device for determining a master information block (MIB), characterized in that: include: a transceiver unit, configured to send a synchronization information block to a terminal device, wherein at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; The at least one field includes at least one of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field.

26. The device according to claim 25, characterized in that The at least one field is the spare field, and the spare field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

27. The device according to claim 25, wherein The at least one field is the demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

28. The device according to claim 25, wherein The at least one field is the synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; The least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or The most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or Any one of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or At least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

29. The device according to claim 28, wherein When the least significant bit, the most significant bit, or any of the bits is 0, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the least significant bit, the most significant bit, or any one of the bits is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

30. The device according to claim 25, wherein The at least one field includes at least two fields of the spare field, the demodulation reference signal type A position field, or the synchronization signal subcarrier offset field; The bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

31. A device for determining a master information block (MIB), characterized in that: include: A transceiver unit, configured to receive a synchronization information block from a network device, wherein at least one field contained in the synchronization information block is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band, and the at least one field is located in the MIB; wherein the at least one field includes at least one of a spare field, a demodulation reference signal type A position field, or a synchronization signal subcarrier offset field; A processing unit is configured to determine, based on the at least one field included in the synchronization information block, whether the MIB is a MIB applied to an unlicensed frequency band.

32. The device according to claim 31, wherein The at least one field is the spare field, and the spare field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

33. The device according to claim 31, wherein The at least one field is the demodulation reference signal type A position field, and the demodulation reference signal type A position field includes one bit; If the one bit is 0, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; When the one bit is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

34. The device according to claim 31, wherein The at least one field is the synchronization signal subcarrier offset field, and the synchronization signal subcarrier offset field includes four bits; The least significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or The most significant bit of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or Any one of the four bits is used to indicate whether the MIB is a MIB applied to an unlicensed frequency band; or At least two bits of the four bits jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

35. The device according to claim 34, wherein When the least significant bit, the most significant bit, or any of the bits is 0, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the least significant bit, the most significant bit, or any one of the bits is 1, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band.

36. The device according to claim 31, wherein The at least one field includes at least two fields of the spare field, the demodulation reference signal type A position field, or the synchronization signal subcarrier offset field; The bits included in the at least two fields jointly indicate whether the MIB is a MIB applied to an unlicensed frequency band.

37. A device for determining a master information block (MIB), characterized in that: include: A transceiver unit is used to send a synchronization information block to a terminal device, wherein the time domain position of at least one of the primary synchronization signal PSS, secondary synchronization signal SSS and physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band.

38. The device according to claim 37, wherein The time domain position of at least one of the PSS and the SSS is used to indicate that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the PSS is located on the first orthogonal frequency division multiplexing (OFDM) symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band.

39. The device according to any one of claims 37-38, characterized in that The time domain position of the PBCH information is used to indicate that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the first PBCH information is located at a first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at a second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first PBCH information is located at a first frequency domain position on a third OFDM symbol of the synchronization information block, and the second PBCH information is located at a second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or In a case where the first demodulation reference signal DMRS is located at a third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at a fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first DMRS is located at a third frequency domain position on a third OFDM symbol of the synchronization information block, and the second DMRS is located at a fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; The first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

40. The device according to claim 39, wherein The first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

41. The device according to claim 39, wherein The third frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}; in, It is the cell identifier.

42. The device according to claim 39, wherein The subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55} and subcarrier numbers {183, 184, ..., 192} in the first OFDM symbol of the synchronization information block do not contain information; the subcarriers with subcarrier numbers {0, 1, ..., 55} and subcarrier numbers {183, 184, ..., 239} in the third OFDM symbol of the synchronization information block do not contain information; or The subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

43. A device for determining a master information block (MIB), characterized in that: include: A transceiver unit is configured to receive a synchronization information block from a network device, wherein the time domain position of at least one of the primary synchronization signal PSS, the secondary synchronization signal SSS, and the physical broadcast channel PBCH information contained in the synchronization information block is used to indicate whether the MIB contained in the synchronization information block is a MIB applied to an unlicensed frequency band; A processing unit is used to determine whether the MIB is a MIB applied to an unlicensed frequency band according to the time domain position of at least one item of PSS, SSS and PBCH information included in the synchronization information block.

44. The device according to claim 43, wherein The time domain position of at least one of the PSS and the SSS is used to indicate that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the PSS is located on the first orthogonal frequency division multiplexing (OFDM) symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or In a case where the PSS is located on the first OFDM symbol of the synchronization information block and the SSS is located on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed band; otherwise, the MIB is a MIB applied to a licensed band; or When the PSS is located on the third OFDM symbol of the synchronization information block and the SSS is located on the first OFDM symbol of the synchronization information block, the MIB is the MIB applied to the unlicensed frequency band; otherwise, the MIB is the MIB applied to the licensed frequency band.

45. The device according to any one of claims 43 to 44, characterized in that The time domain position of the PBCH information is used to indicate that the MIB included in the synchronization information block is a MIB applied to an unlicensed frequency band, including: In a case where the first PBCH information is located at a first frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second PBCH information is located at a second frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first PBCH information is located at a first frequency domain position on a third OFDM symbol of the synchronization information block, and the second PBCH information is located at a second frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or In a case where the first demodulation reference signal DMRS is located at a third frequency domain position on the first OFDM symbol of the synchronization information block, and / or the second DMRS is located at a fourth frequency domain position on the first OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; or When the first DMRS is located at a third frequency domain position on a third OFDM symbol of the synchronization information block, and the second DMRS is located at a fourth frequency domain position on the third OFDM symbol of the synchronization information block, the MIB is a MIB applied to an unlicensed frequency band; otherwise, the MIB is a MIB applied to a licensed frequency band; The first DMRS is included in the first PBCH information, and the second DMRS is included in the second PBCH information.

46. ​​The device according to claim 45, wherein The first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}; or, the first frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {192, 193, ..., 239}, and the second frequency domain position includes the subcarriers of the synchronization information block whose subcarrier numbers are {0, 1, ..., 47}.

47. The device according to claim 45, wherein The third frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}, and the fourth frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}; or, the first frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {192+v, 196+v, ..., 236+v}, and the second frequency domain position includes the subcarrier whose subcarrier sequence number of the synchronization information block is {0+v, 4+v, ..., 44+v}; in, It is the cell identifier.

48. The device according to claim 45, wherein The subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55, 183, 184, ..., 239} on the first OFDM symbol of the synchronization information block and the subcarriers with subcarrier numbers {0, 1, ..., 55, 183, 184, ..., 191} on the third OFDM symbol of the synchronization information block do not contain information; or The subcarriers with subcarrier numbers {48, 49, ..., 55} and subcarrier numbers {183, 184, ..., 192} in the first OFDM symbol of the synchronization information block do not contain information; the subcarriers with subcarrier numbers {0, 1, ..., 55} and subcarrier numbers {183, 184, ..., 239} in the third OFDM symbol of the synchronization information block do not contain information; or The subcarrier numbers {0, 1, ..., 55} and the subcarrier numbers {183, 184, ..., 239} on the first OFDM symbol of the synchronization information block do not contain information; the subcarrier numbers {48, 49, ..., 55} and the subcarrier numbers {183, 184, ..., 192} on the third OFDM symbol of the synchronization information block do not contain information.

49. A computer-readable storage medium, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to execute the method of any one of claims 1 to 6, or the method of any one of claims 7 to 12, or the method of any one of claims 13 to 18, or the method of any one of claims 19 to 24.

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