CN116097787A

CN116097787A - Information sending and receiving method, device and system

Info

Publication number: CN116097787A
Application number: CN202080104991.1A
Authority: CN
Inventors: 罗之虎; 金哲
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2023-05-09
Also published as: WO2022067723A1; CN116097787A8

Abstract

The embodiment of the application provides an information sending and receiving method, device and system, which can provide a synchronous signal and a PBCH for a narrowband terminal and reduce resource expenditure. In the method, the network device determines and transmits a synchronization signal, first information, and second information, wherein the first information is carried by a first PBCH, the second information is carried by a second PBCH, and the first information is different from the second information. After receiving the synchronization signal from the network device, the terminal device determines a cell identifier according to the synchronization signal, and receives the first information and the second information according to the cell identifier, or receives the second information according to the cell identifier.

Description

Information sending and receiving method, device and system

Technical Field

The present disclosure relates to the field of communications, and in particular, to a method, an apparatus, and a system for sending and receiving information.

Background

Currently, a synchronization signal/physical broadcast channel block (SSB) is defined in a new air interface (NR) of a fifth generation (the fifth generation, 5G) mobile communication system. Wherein the SSB includes a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel (physical broadcast channel, PBCH).

As shown in fig. 1, one SSB occupies 4 consecutive orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols in the time domain. In the frequency domain, consecutive 240 subcarriers are occupied, and the 240 subcarriers are numbered from 0 to 239 in order of increasing frequency.

However, the above scheme is mainly used for broadband terminals, and when narrowband terminals are introduced into the system, there may be some problems if the scheme is used.

Disclosure of Invention

The application provides an information sending and receiving method, device and system suitable for a narrowband terminal.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in a first aspect, an information transmission method is provided. The method is applied to a first communication system in which a network device determines and transmits a synchronization signal, first information, and second information. Wherein the first information is carried by a first physical broadcast channel PBCH, the second information is carried by a second PBCH, and the first information is different from the second information.

Based on the scheme, in the first communication system, the network device sends the synchronization signal, the first information and the second information, the first information is carried through the first PBCH, and the second information is carried through the second PBCH, on one hand, because the bandwidth occupied by the synchronization signal is smaller, the working bandwidth of the narrowband terminal can comprise the bandwidth occupied by the synchronization signal, and therefore the narrowband terminal can receive the synchronization signal. In addition, the narrowband terminal may receive the first PBCH and the second PBCH, or the second PBCH, according to its operation bandwidth, thereby receiving the first information and the second information, or the second information. Thus, for a narrowband terminal, the present application may provide a synchronization signal and information carried by the PBCH for it. On the other hand, the working bandwidth of the wideband terminal in the first communication system may also include the bandwidth occupied by the synchronization signal, so that the wideband terminal may also receive the synchronization signal, that is, the synchronization signal may be shared by the narrowband terminal and the wideband terminal, so that it is not necessary to provide respective synchronization signals for the narrowband terminal and the wideband terminal respectively, and resource overhead is reduced.

In some possible designs, the second information includes at least one of: first sub-information, wherein the first sub-information is used for scheduling a first system information block SIB1 or is used for configuring a first physical downlink control channel PDCCH, and the first PDCCH is used for scheduling the first SIB1; the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not; third sub-information indicating whether to allow selection of the same-frequency cell of the forbidden cell; fourth sub-information indicating whether the system information is updated.

Based on the scheme, when the second information comprises the first sub-information, a first PDCCH for scheduling the first SIB1 can be configured for the narrowband terminal, so that when a second PDCCH for scheduling the second SIB1 is configured for the wideband terminal in the first information, the number of resource blocks occupied by a control resource set corresponding to the second PDCCH can not be limited, and the configuration flexibility of the second PDCCH and the demodulation performance of the second PDCCH can not be influenced; when the second information comprises the second sub information or the third sub information, independent cell prohibition indication or same frequency reselection indication can be provided for the narrowband terminal, so that the configuration flexibility is improved; when the second information comprises the fourth sub-information, the fourth sub-information is used for indicating that the system information is updated, the terminal equipment receives the updated system information, and when the fourth sub-information is used for indicating that the system information is not updated, the terminal equipment does not need to receive the system information, so that unnecessary receiving of the system information can be reduced, and power consumption of the terminal equipment is saved.

In some possible designs, the first information includes a system frame number of a frame in which the synchronization signal is located, and the second information does not include the system frame number; alternatively, the first information includes N high-order bits of the system frame number, and the second information does not include N high-order bits of the system frame number, N being a positive integer.

Based on the scheme, when the terminal equipment can receive the first information, the first information comprises the system frame number, the second information does not comprise the system frame number, when the first information comprises N high-order bits of the system frame number, the second information does not comprise N high-order bits of the system frame number, and at the moment, the terminal equipment can multiplex the system frame number or the N high-order bits of the system frame number, which are included in the first information, so that signaling overhead is reduced.

In some possible designs, the second information includes a system frame number of a frame in which the aforementioned synchronization signal is located or N high order bits of the system frame number. For example, when the working bandwidth of the terminal device is smaller than the bandwidth occupied by the first PBCH, the second information includes a system frame number of the frame where the aforementioned synchronization signal is located or N high-order bits of the system frame number.

In some possible designs, the bandwidth occupied by the second PBCH is less than the bandwidth occupied by the first PBCH.

Based on the above two possible designs, when the bandwidth occupied by the second PBCH is smaller than the bandwidth occupied by the first PBCH, the narrowband terminal may not be able to receive the first information on the first PBCH, and thus may not be able to obtain the system frame number of the frame where the synchronization signal is located, and at this time, the second information includes the system frame number of the frame where the synchronization signal is located or N high-order bits of the system frame number, so that the narrowband terminal may learn the system frame number or N high-order bits thereof, and thus perform subsequent processing according to the system frame number or N high-order bits thereof, for example, receive subsequent system information and paging messages, initiate random access, and so on.

In some possible designs, the synchronization signal and the first PBCH form an SSB, a frequency domain location of the second PBCH is adjacent to a frequency domain location of the SSB, and a time domain location of the second PBCH is the same as or included in the time domain location of the SSB; alternatively, the time domain position of the second PBCH is adjacent to the time domain position of the SSB, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.

Based on the possible design, the time domain position of the second PBCH is contained in the time domain position of the SSB formed by the synchronous signal and the first PBCH, the frequency domain position is adjacent to the frequency domain position of the SSB, and the influence of the second PBCH on the energy-saving mechanism of the network equipment is reduced in a frequency division multiplexing mode. Or, the time domain position of the second PBCH is different from the time domain position of the SSB composed of the synchronization signal and the first PBCH, so that the occupation of spectrum resources can be reduced in a time division multiplexing mode.

In some possible designs, the first information includes fifth sub-information, and when the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, the fifth sub-information is used to indicate that the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB; the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB when the time domain position of the second PBCH is adjacent to the time domain position of the SSB.

In some possible designs, the first information includes sixth sub-information for indicating: the second PBCH exists in the first communication system and/or the cell corresponding to the second PBCH is a non-forbidden cell. Alternatively, the sixth sub-information is used to indicate: and the first communication system does not have the second PBCH and/or the cell corresponding to the second PBCH is a forbidden cell.

Based on the possible design, the terminal device receives the second information when the sixth sub-information indicates that the second PBCH and/or the cell corresponding to the second PBCH exist in the first communication system is a non-forbidden cell, and does not receive the second information when the sixth sub-information indicates that the second PBCH and/or the cell corresponding to the second PBCH do not exist in the first communication system is a forbidden cell, so that the implementation of the network device side is more flexible, the terminal device can receive or not receive the second information according to the sixth sub-information, blind reception can be avoided when the network device does not send the second information, and the power consumption of the terminal device is reduced.

In some possible designs, the first information includes seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to the second PDCCH, and when the number is greater than a first threshold, there is a second PBCH in the first communication system, and the second PDCCH is used for scheduling the second SIB1.

Based on the possible design, whether the second PBCH exists in the system is implicitly indicated by the number of RBs occupied by the CORST corresponding to the second PDCCH, so that signaling overhead can be reduced, and meanwhile, the terminal equipment can firstly determine whether the second PBCH exists or not, and does not receive the second information when the second PBCH does not exist, thereby reducing waste of terminal power consumption.

In some possible designs, the network device transmits the first information and the second information, including: the network equipment encodes the first information according to a first Cyclic Redundancy Check (CRC) code to obtain encoded first information, and encodes the second information according to a second CRC code to obtain encoded second information, wherein the bit number of the first CRC code is different from the bit number of the second CRC code; the network device transmits the encoded first information and the encoded second information.

Based on the possible design, the second information is coded and modulated by using a CRC check mode, and the performance of the second PBCH is ensured through the stronger error detection capability of the CRC. In addition, the CRC system message is smaller, the use is simple, and the implementation complexity of the scheme can be reduced.

In some possible designs, the second information is represented by a sequence. Based on the possible design, the second information borne by the second PBCH is represented by the sequence, and the terminal equipment does not need to carry out complex decoding operation when receiving the second information, and the processing complexity of the terminal equipment can be reduced through simple correlation operation, so that the requirement on the hardware of the terminal equipment is reduced, and the cost of the terminal equipment is further reduced.

In some possible designs, the synchronization signal comprises a secondary synchronization signal SSS, and the energy per resource element EPRE ratio between the second PBCH and SSS is X db, where X is greater than or equal to 0. Based on this possible design, since in the NR system, SSS and the first PBCH have the same EPRE, i.e. the ratio between the EPRE of the first PBCH and the EPRE of the SSS is 0dB, when X is greater than 0, the EPRE of the second PBCH is greater than the EPRE of the first PBCH, i.e. the transmission power of the second PBCH is higher, so that better coverage performance can be achieved compared to the first PBCH.

In a second aspect, an information receiving method is provided. The method is applied to a first communication system, in the method, a terminal device receives a synchronization signal from a network device, acquires a cell identifier according to the synchronization signal, and receives first information and second information according to the cell identifier, or receives second information according to the cell identifier, wherein the first information is carried by a first PBCH, the second information is carried by a second PBCH, and the first information is different from the second information. The technical effects of the second aspect may be referred to the technical effects of the first aspect, which are not described herein.

Optionally, the terminal device receives the second information according to the cell identifier, which may include: the terminal equipment determines the frequency domain position of the second PBCH according to the fifth sub-information, and receives the second information on the frequency domain position of the second PBCH according to the cell identifier; or the terminal equipment determines the time domain position of the second PBCH according to the fifth sub-information, and receives the second information at the time domain position of the second PBCH according to the cell identifier.

Optionally, when the sixth sub-information is used to indicate that the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell, the terminal device receives the first information and the second information according to the cell identifier, and may include: the terminal equipment receives the first information according to the cell identifier, and receives the second information according to the sixth sub-information included in the first information.

In some possible designs, the first information includes seventh sub-information, the seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to the second PDCCH, and the information receiving method further includes: when the number is greater than the first threshold, the terminal device determines that a second PBCH exists in the first communication system, and the second PDCCH is used for scheduling a second SIB1.

In some possible designs, the terminal device receives the first information and the second information according to the cell identity, including: the terminal equipment receives the encoded first information and the encoded second information according to the cell identifier, performs CRC (cyclic redundancy check) on the encoded first information according to the first CRC to obtain the first information, and performs CRC (cyclic redundancy check) on the encoded second information according to the second CRC to obtain the second information, wherein the bit number of the first CRC is different from the bit number of the second CRC.

In some possible designs, the second information is represented by a sequence.

In some possible designs, the synchronization signal comprises a secondary synchronization signal SSS, and the energy per resource element EPRE ratio between the second PBCH and SSS is X db, where X is greater than or equal to 0.

The technical effects of any possible design of the second aspect may be referred to the technical effects of the corresponding design of the first aspect, which are not described herein.

In a third aspect, a communication device is provided for implementing the above methods. The communication means may be a network device of the first aspect, or a device comprising the network device, or a device, such as a chip, comprised in the network device; alternatively, the communication means may be the terminal device of the second aspect, or a device comprising the terminal device, such as a chip. The communication device comprises corresponding modules, units or means (means) for realizing the method, and the modules, units or means can be realized by hardware, software or realized by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the functions described above.

In a fourth aspect, there is provided a communication apparatus comprising: a processor and a memory; the memory is configured to store computer instructions that, when executed by the processor, cause the communication device to perform the method of any of the above aspects. The communication means may be a network device of the first aspect, or a device comprising the network device, or a device, such as a chip, comprised in the network device; alternatively, the communication means may be the terminal device of the second aspect, or a device comprising the terminal device, such as a chip.

In a fifth aspect, there is provided a communication apparatus comprising: a processor; the processor is configured to couple to the memory and to execute the method according to any of the above aspects in accordance with the instructions in the memory after reading the instructions. The communication means may be a network device of the first aspect, or a device comprising the network device, or a device, such as a chip, comprised in the network device; alternatively, the communication means may be the terminal device in the above second aspect, or a device including the above terminal device, such as a chip.

In a sixth aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the method of any of the above aspects.

In a seventh aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above aspects.

An eighth aspect provides a communication apparatus comprising: an interface circuit, which may be a code/data read/write interface circuit, and at least one processor, for receiving computer-executable instructions (the computer-executable instructions being stored in memory, possibly read directly from the memory, or possibly via other devices) and transmitting them to the processor; the processor is configured to execute the computer-executable instructions to perform the method of any of the above aspects. The communication means may be a network device of the first aspect, or a device comprising the network device, or a device, such as a chip, comprised in the network device; alternatively, the communication means may be the terminal device of the second aspect, or a device comprising the terminal device, such as a chip.

In a ninth aspect, there is provided a communications device (e.g. which may be a chip or a system of chips) comprising a processor for carrying out the functions referred to in any of the above aspects. In one possible design, the communication device further includes a memory for holding necessary program instructions and data. When the communication device is a chip system, the communication device may be formed of a chip, or may include a chip and other discrete devices.

The technical effects caused by any one of the design manners of the third aspect to the ninth aspect may be referred to the technical effects caused by the different design manners of the first aspect or the second aspect, and are not repeated herein.

In a tenth aspect, a communication system is provided, which includes the terminal device described in the above aspect and the network device described in the above aspect.

Drawings

FIG. 1 is a schematic diagram of a prior art SSB;

fig. 2 is a schematic diagram of a structure of a conventional time-frequency resource grid;

FIG. 3 is a schematic diagram showing the comparison of the operation bandwidth of a narrowband terminal with the bandwidth occupied by SSB;

FIG. 4 is a schematic diagram showing the comparison of the operation bandwidth of a narrowband terminal with the bandwidth occupied by SSB;

fig. 5 is a schematic structural diagram of a first communication system according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a terminal device and a network device provided in an embodiment of the present application;

fig. 7 is a flow chart of a method for sending and receiving information according to an embodiment of the present application;

fig. 8a is a schematic diagram of a frequency domain position of a second PBCH according to an embodiment of the present application;

fig. 8b is a schematic diagram of a frequency domain position of another second PBCH according to an embodiment of the present application;

fig. 8c is a schematic diagram of a frequency domain position of a second PBCH according to an embodiment of the present application;

fig. 9a is a schematic diagram of a time domain position of a second PBCH according to an embodiment of the present application;

fig. 9b is a schematic diagram of a time domain position of another second PBCH according to an embodiment of the present application;

fig. 9c is a schematic diagram of a time domain position of a second PBCH according to an embodiment of the present application;

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

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

Detailed Description

For convenience in understanding the schemes in the embodiments of the present application, a brief description or definition of the related art is given first as follows:

1. thing networking (internet of things, ioT):

IoT is the "internet of things". It extends the user side of the internet to any article-to-article, allowing information exchange and communication between any article-to-article. Such a communication scheme is also called inter-machine communication (machine type communications, MTC). Wherein the communicating nodes are referred to as IoT terminals or IoT devices. Typical IoT applications include various aspects of internet of vehicles, smart communities, industrial detection monitoring, smart meter reading, smart grids, smart agriculture, smart transportation, smart homes, and environmental detection.

Because the internet of things needs to be applied in various scenes, such as from outdoor to indoor and from ground to underground, a lot of special requirements are put on the design of the internet of things. For example, because IoT terminals in certain scenarios are used in environments with poor coverage, such as electricity meter water meters, are often installed indoors or even in places with poor wireless network signals such as basements, coverage enhancement techniques are needed to address this. Alternatively, because the number of IoT terminals in some scenarios is far greater than the number of devices that people communicate with, that is, large-scale deployment is required, ioT terminals are required to be available and used at very low cost. Alternatively, ioT terminals that support low rates are required because the packets transmitted by IoT terminals in some scenarios are small and not delay sensitive. Or, because in most cases IoT terminals are battery powered, but in many scenarios, ioT terminals are required to be able to be used for more than ten years without replacement of the battery, this requires IoT terminals to be able to operate with extremely low power consumption.

2、NR：

In NR, the basic unit in the frequency domain is one subcarrier, and the subcarrier spacing (subcarrier spacing, SCS) may be 15kHz, 30kHz, or the like. In the NR physical layer, the unit of uplink or downlink frequency domain resources is a physical resource block (physical resource block, PRB), each PRB consisting of 12 consecutive subcarriers in the frequency domain.

An exemplary NR downlink time-frequency resource grid is shown in fig. 2. Wherein,

indicating the number of downlink RBs. Each element on the resource grid is referred to as a Resource Element (RE), which is the smallest physical resource that comprises one subcarrier within one OFDM symbol. The uplink time-frequency resource grid is similar to the downlink time-frequency resource network and will not be described in detail herein.

The basic time unit of NR downlink resource scheduling is one slot (slot), and generally, one slot is composed of 14 OFDM symbols in time. In the time domain, the NR transmissions are organized into 10 millisecond (ms) frames (frames), each identified by a system frame number (system frame number, SFN), the period of the SFN being equal to 1024. Each frame includes 10 subframes (subframes) of length 1ms, each subframe including one or more slots. The number of slots included in each subframe is determined by the subcarrier spacing, and each subframe contains one slot when the subcarrier spacing is 15 kHz.

3、NR SSB：

As shown in fig. 1 in the background art, the NR SSB includes PSS, SSS, and PBCH, where the first OFDM symbol numbered 0 carries PSS, the subcarriers numbered 0 to 55, 183 to 239 are set to 0, and the subcarriers numbered 56 to 182 are the subcarriers occupied by PSS; the OFDM symbols numbered 1 and 3 bear PBCH, and each 4 continuous subcarriers has a modulation-demodulation reference signal (demodulation reference signal, DMRS) corresponding to the PBCH; the OFDM symbol numbered 2 carries SSS and PBCH, the subcarriers numbered 56 to 182 are subcarriers occupied by SSS, the subcarriers numbered 0 to 47, 192 to 239 are subcarriers occupied by PBCH, and the remaining subcarriers are set to 0.

Wherein, the PBCH carries a main information block (master information block, MIB) which comprises a system frame number carried by a systemFrameNumber field for synchronization of the terminal equipment and the network side. Note that the MIB includes 6 most significant bits (most significant bit, MSB) in a 10-bit (bit) system frame number.

Optionally, the MIB may further include one or more of the following information:

subcarrier spacing: carried by the sub-carrier spacing command field, is used to indicate the subcarrier spacing used for system information block (system information block, SIB) 1 (i.e., SIB 1), message 2 or message 4 during initial access, paging (paging) messages, and broadcast system information (system information, SI) messages.

Subcarrier offset: carried by the SSB-subsearrieroffset field, is used to calculate the subcarrier offset of subcarrier 0 of the common resource block (common resource block, CRB) to subcarrier 0 of the SSB.

DMRS position indication: and the DMRS-TypeA-Position field is used for bearing and indicating the Position of the first DMRS in uplink or downlink.

The PDCCH configuration of the scheduling SIB1 indicates a control-resource set (core) 0 and search space configuration information for receiving SIB1 through the pdfch-ConfigSIB 1 field bearer.

Cell barring indication: carried by a cell barred field for indicating whether the cell is a barred cell.

Co-channel reselection indication: the highest level cell is forbidden or the terminal device is considered forbidden by the cell is allowed to select other cells with the same frequency as the forbidden cell when the terminal device selects/reselects the cell.

Idle field: spark, the free field occupies 1 bit.

In addition, the PBCH also carries another partial payload (payload) other than MIB, which is transmitted in the PBCH transport block as part of channel coding, i.e., the partial payload is outside MIB coding, which is added at the physical layer before MIB coding, and which occupies 8 bits for carrying the 4 least significant bits of the system frame number, SSB index, etc. Currently, there are 2 idle bits in the 8 bits.

It should be noted that, for convenience of description, the PBCH included in the NR SSB is referred to as a first PBCH in the following embodiments; the PDCCH configured by the PDCCH-ConfigSIB1 field in the MIB carried by the first PBCH is called a second PDCCH; another part of the load carried in the first PBCH except the MIB is referred to as a first load; the SIB scheduled by the second PDCCH is referred to as a second SIB1, wherein the first PDCCH and the first SIB1 will be described in the subsequent embodiments, and the second SIB1 may be understood as SIB1 for the wideband terminal. This is generally described herein, and will not be described in detail.

Because the requirements of baseband processing hardware such as a large bandwidth analog-to-digital converter (analog to digital converter, ADC), a digital-to-analog converter (digital to analog converter, DAC), a fast fourier transform (fast flourier transform, FFT), a buffer, and an uplink and downlink processing module are high, the requirements of the hardware can be relaxed by a small bandwidth, so that the cost is reduced, so that in order to support the application of the internet of things with relatively low cost, the most direct means is to reduce the working bandwidth of the terminal, namely, the application of the internet of things is completed by using a narrowband terminal. The narrowband terminal that completes the internet of things application may also be referred to as an IoT terminal or IoT device.

However, when introducing a narrowband SSB in the system, if a completely new narrowband SSB including PSS, SSS and PBCH, which is different from the aforementioned NR SSB, is introduced for the narrowband terminal, network resource overhead is large.

It can be appreciated that, after the narrowband terminal is introduced into the system, the narrowband terminal is not necessarily used for completing the application of the internet of things, and other uses are possible, that is, the application scenario of the application is not limited to be an IoT scenario.

Based on this, the present application considers multiplexing PSS and SSS of NR SSB when introducing narrowband terminals, redesigning PBCH for narrowband terminals.

In one possible implementation, for a narrowband terminal with an operating bandwidth of about 5MHz, when the subcarrier spacing is 15kHz, the frequency domain bandwidth occupied by the PSS and SSS available in fig. 1 is about 2MHz, and the frequency domain bandwidth occupied by the first PBCH is about 3.6MHz, so that the narrowband terminal can completely receive the NR SSB, as shown in fig. 3. At this time, for the PBCH design for narrowband terminals, a simpler scheme is to multiplex the first PBCH. However, by analysis, this approach may have the following problems:

1) Affecting the configuration flexibility of the network device and affecting the demodulation performance of the PDCCH scheduling SIB 1.

In the MIB carried by the first PBCH, the configuration information of the PDCCH for scheduling the SIB1 is carried through a PDCCH-ConfigSIB1 field. The number of Resource Blocks (RBs) occupied by CORESET corresponding to PDCCH of the scheduling SIB1 configured through the parameter is 24 or 48 or 96. When it occupies a minimum of 24 RBs, the corresponding frequency domain bandwidth is 4.32MHz. If the narrowband terminal with the operating bandwidth of about 5MHz supports reading the MIB carried by the first PBCH and the second SIB1, configuration of the network device needs to be limited, for example, the network device is limited to configure the number of RBs occupied by CORESET corresponding to the PDCCH for scheduling the second SIB1 (i.e., the second PDCCH) to 24. This limitation may affect the configuration flexibility of the network device, and in addition, configuring the RB number to 24 may affect the demodulation performance of the second PDCCH.

2) A cell prohibit indication or a co-channel reselection indication cannot be provided for the narrowband terminal.

In the MIB carried by the first PBCH, a cell prohibition indication or a common frequency reselection indication is carried by a cellBarred or an intra freqreselection field, respectively, and this function is used for temporarily preventing the terminal from accessing the cell during maintenance. The earlier the notification occasion of the indication, the earlier the terminal can know whether it is allowed to access the cell or not, avoiding more unnecessary reception. For example, in the prior art, when the MIB indicates that the terminal is prohibited from accessing the cell, the terminal may stop receiving SIB1 of the cell, and if the SIB1 indicates that the terminal is prohibited from accessing the cell, the terminal may learn after receiving the MIB and SIB1, which may increase power consumption of the terminal for receiving SIB 1.

As can be seen from the foregoing description, the MIB carried by the first PBCH has fewer idle bits, only has 1 bit, and the 1 bit cannot be used to provide a cell prohibition indication or a common frequency reselection indication for the narrowband terminal. If the narrowband terminal multiplexes the cell prohibition instruction or the common frequency reselection instruction in the MIB, configuration flexibility of the network device may be affected, for example, when the network device instructs the cell prohibition, the broadband terminal is prevented from accessing the cell, and the narrowband terminal is prevented from accessing the cell, so that different cell prohibition instructions or common frequency reselection instructions of the same cell cannot be configured for the broadband terminal and the narrowband terminal.

In another possible implementation, for a narrowband terminal with an operating bandwidth of around 2MHz, as can be obtained from fig. 1 when the subcarrier spacing is 15kHz, such narrowband terminal can fully receive PSS and SSS of NR SSB, and cannot receive the full first PBCH, as shown in fig. 4.

At this time, for the PBCH design for narrowband terminals, a simpler scheme is to multiplex the PSS and the first PBCH within the SSS frequency domain bandwidth range. However, through numerical analysis, the first PBCH in the PSS and SSS frequency domain bandwidth ranges accounts for about 50% of the entire first PBCH, and if only the first PBCH in the PSS and SSS frequency domain bandwidth ranges is received, the demodulation performance of the first PBCH may be degraded, and the coverage performance may be degraded. In addition, this implementation also suffers from the problems in the scenario shown in fig. 3.

As can be seen from the above analysis, the narrowband terminal may not directly use the existing NR SSB, and therefore, the following embodiments of the present application provide an information sending and receiving method to design a PBCH that is reasonably suitable for the narrowband terminal.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Wherein, in the description of the present application, "/" means that the related objects are in a "or" relationship, unless otherwise specified, for example, a/B may mean a or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a and b, a and c, b and c, a and b and c, wherein a, b and c can be single or multiple.

In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.

As shown in fig. 5, a first communication system 10 is provided in an embodiment of the present application. The first communication system 10 includes at least one network device 20 and one or more terminal devices 30 connected to the network device 20. Alternatively, different terminal devices 30 may communicate with each other.

Alternatively, the first communication system 10 may be an NR system, or may be a new network system facing the future, etc., which is illustrative, and the embodiments of the present application may be applicable to an application of the internet of things of the NR system, and the embodiments of the present application are not limited in particular. In practical applications, the first communication system is not limited to this, and is generally described herein, and will not be described in detail. Furthermore, the term "system" may be interchangeable with "network".

Taking the interaction between the network device 20 and any terminal device 30 shown in fig. 5 as an example, in this embodiment of the present application, the network device determines and sends a synchronization signal, first information, and second information, where the first information is carried by a first PBCH, and the second information is carried by a second PBCH, and the first information is different from the second information. Correspondingly, the terminal equipment receives the synchronizing signal from the network equipment, acquires the cell identifier according to the synchronizing signal, and then receives the first information and the second information according to the cell identifier or receives the second information according to the cell identifier.

Based on the scheme, in the first communication system, the network device sends the synchronization signal, the first information and the second information, the first information is carried through the first PBCH, and the second information is carried through the second PBCH, on one hand, because the bandwidth occupied by the synchronization signal is smaller, the working bandwidth of the narrowband terminal can comprise the bandwidth occupied by the synchronization signal, and therefore the narrowband terminal can receive the synchronization signal. In addition, the narrowband terminal may receive the first PBCH and the second PBCH, or the second PBCH, according to its operation bandwidth, thereby receiving the first information and the second information, or the second information. Therefore, for a narrowband terminal, the method and the device can provide a synchronous signal and information carried by the PBCH for the narrowband terminal; on the other hand, the working bandwidth of the wideband terminal in the first communication system may also include the bandwidth occupied by the synchronization signal, so that the wideband terminal may also receive the synchronization signal, that is, the synchronization signal may be shared by the narrowband terminal and the wideband terminal, so that it is not necessary to provide respective synchronization signals for the narrowband terminal and the wideband terminal respectively, and resource overhead is reduced.

Optionally, the network device 20 in the embodiment of the present application is a device that accesses the terminal device 30 to a wireless network. The network device 20 may be a node in a radio access network, also referred to as a base station, and also referred to as a radio access network (radio access network, RAN) node (or device). For example, the network device may include a next generation Node B (next generation Node B, gNB) in a 5G system, or may further include a transmission reception point (transmission reception point, TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), a base band pool BBU pool, or a WiFi Access Point (AP), etc.; still yet or further, may include Centralized Units (CUs) and Distributed Units (DUs) in a cloud access network (cloud radio access network, cloudRAN) system; or may include a device implementing a base station function in a non-terrestrial network (non-terrestrial network, NTN), i.e. may be deployed on an aerial platform or a satellite, where in NTN, a network device may be used as a layer 1 (L1) relay, or may be used as a base station, or may be used as a Distributed Unit (DU), or may be used as an access backhaul integrated (integrated access and backhual, IAB) node; still alternatively, a device in the IoT that implements the base station functionality, such as, for example, a vehicle-to-evaluation (V2X), a device-to-device (D2D), or a machine-to-machine (machine to machine, M2M), the embodiments of the present application are not limited.

Alternatively, the base station in the embodiments of the present application may include various forms of base stations, for example: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc., as embodiments of the present application are not specifically limited.

Alternatively, the network device 20 in the embodiment of the present application may also refer to a Central Unit (CU) or a Distributed Unit (DU), or the network device may also be composed of CU and DU. Multiple DUs may share one CU. One DU may also connect multiple CUs. CU and DU can be understood as a division of the base station from a logical function perspective. The CU and the DU may be physically separated or may be disposed together, which is not specifically limited in the embodiment of the present application. The CU and the DU may be connected by an interface, for example, an F1 interface. CUs and DUs may be partitioned according to the protocol layers of the wireless network. For example, functions of an RRC protocol layer, a service data adaptation protocol stack (service data adaptation protocol, SDAP) protocol layer, and a packet data convergence layer protocol (packet data convergence protocol, PDCP) protocol layer are provided in the CU, while functions of a radio link control (radio link control, RLC) protocol layer, a medium access control (media access control, MAC) protocol layer, a Physical (PHY) protocol layer, and the like are provided in the DU.

It will be appreciated that the partitioning of CU and DU processing functions in accordance with such protocol layers is merely an example, and may be partitioned in other ways.

Alternatively, the terminal device 30 in the embodiment of the present application may be a device with a smaller operating bandwidth for implementing a wireless communication function, for example, a terminal or a chip that may be used in the terminal. The terminal may be a NR network or a User Equipment (UE) in a future evolved PLMN, an access terminal, a terminal unit, a terminal station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, a terminal apparatus, or the like. An access terminal may be a cellular telephone, cordless telephone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capability, computing device or other processing device connected to a wireless modem, vehicle-mounted device or wearable device, virtual Reality (VR) terminal device, augmented reality (augmented reality, AR) terminal device, wireless terminal in industrial control (industrial control), wireless terminal in self-driving (self-driving), wireless terminal in telemedicine (remote medium), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), etc. Alternatively, the terminal may be a terminal in IoT with communication functionality, such as a terminal in V2X (e.g., an internet of vehicle device), a terminal in D2D communication, or a terminal in M2M communication, etc. The terminal may be mobile or stationary.

Alternatively, the network device 20 and the terminal device 30 in the embodiments of the present application may also be referred to as a communication device, which may be a general-purpose device or a special-purpose device, which is not specifically limited in the embodiments of the present application.

Optionally, as shown in fig. 6, a schematic structural diagram of the network device 20 and the terminal device 30 provided in the embodiments of the present application is shown.

Wherein the terminal device 30 comprises at least one processor (illustrated in fig. 6 by way of example as comprising one processor 301) and at least one transceiver (illustrated in fig. 6 by way of example as comprising one transceiver 303). Optionally, the terminal device 30 may further include at least one memory (illustrated in fig. 6 by way of example as including one memory 302), at least one output device (illustrated in fig. 6 by way of example as including one output device 304), and at least one input device (illustrated in fig. 6 by way of example as including one input device 305).

The processor 301, the memory 302 and the transceiver 303 are connected by a communication line. The communication line may include a pathway to communicate information between the aforementioned components.

The processor 301 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application Specific Integrated Circuit (ASIC), or one or more integrated circuits for controlling the execution of programs in accordance with aspects of the present application. In a specific implementation, the processor 301 may also include multiple CPUs, as an embodiment, and the processor 301 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

The memory 302 may be a device having a memory function. For example, but not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 302 may be stand alone and be connected to the processor 301 by a communication line. The memory 302 may also be integrated with the processor 301.

Optionally, the memory 302 is configured to store computer-executable instructions for executing the embodiments of the present application, and is controlled to be executed by the processor 301. Specifically, the processor 301 is configured to execute computer-executable instructions stored in the memory 302, thereby implementing the information sending and receiving methods described in the embodiments of the present application.

Alternatively, in the embodiment of the present application, the processor 301 may perform functions related to processing in a method provided in the embodiment of the present application, where the transceiver 303 is responsible for communicating with other devices or a communication network, and the embodiment of the present application is not limited in detail.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program code or computer program code, which is not specifically limited in the embodiments of the present application.

The transceiver 303 may use any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), or wireless local area network (wireless local area networks, WLAN), etc. The transceiver 303 includes a transmitter (Tx) and a receiver (Rx).

The output device 304 communicates with the processor 301 and may display information in a variety of ways. For example, the output device 304 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like.

The input device 305 communicates with the processor 301 and may accept user input in a variety of ways. For example, the input device 305 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The network device 20 includes at least one processor (illustrated in fig. 6 by way of example as including one processor 201) and at least one transceiver (illustrated in fig. 6 by way of example as including one transceiver 203). Optionally, the network device 20 may further include at least one memory (illustrated in fig. 6 by way of example as including one memory 202) and at least one network interface (illustrated in fig. 6 by way of example as including one network interface 204). Wherein the processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected by communication lines. The network interface 204 is used to connect with a core network device through a link (e.g., S1 interface) or connect with a network interface of another network device (not shown in fig. 6) through a wired or wireless link (e.g., X2 interface), which is not specifically limited in this embodiment of the present application. In addition, the description of the processor 201, the memory 202 and the transceiver 203 may refer to the description of the processor 301, the memory 302 and the transceiver 303 in the terminal device 30, which are not repeated herein.

It will be appreciated that the structure shown in fig. 6 does not constitute a specific limitation on the terminal device 30 or the network device 20. For example, in other embodiments of the present application, terminal device 30 or network device 20 may include more or fewer components than shown, or may combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The information transmitting and receiving methods provided in the embodiments of the present application will be described in the following with reference to fig. 1 to 6 by taking interaction between the network device 20 and any terminal device 30 shown in fig. 5 as an example.

It will be understood that in the embodiments of the present application, the terminal device and/or the network device may perform some or all of the steps in the embodiments of the present application, these steps or operations are merely examples, and other operations or variations of various operations may also be performed in the embodiments of the present application. Furthermore, the various steps may be performed in a different order presented in accordance with embodiments of the present application, and it is possible that not all of the operations in the embodiments of the present application may be performed.

It will be appreciated that in various embodiments of the present application, the interaction between the network device and the terminal device may also be applied to the interaction between the CU and the terminal device, or the interaction between the DU and the terminal device. It will be appreciated that the interaction mechanism between the network device and the terminal device in the embodiments of the present application may be modified appropriately, so as to adapt to interactions between the CU or the DU and the terminal device.

It should be noted that, in the embodiments described below, the names of the messages between the devices or functions or the names of the parameters in the messages are only an example, and may be other names in the specific implementation, which is not specifically limited in the embodiments of the present application.

In the following embodiments of the present application, unless specifically stated otherwise, the terminal device refers to a narrowband terminal, and is described in detail herein, and the following embodiments are not repeated.

It can be understood that the operation bandwidth of the wideband terminal in the embodiments described below is greater than the operation bandwidth of the narrowband terminal, for example, the wideband terminal may be a smart phone in an existing 4G or 5G communication system, and the form of the wideband terminal is not specifically limited in this application.

In the following embodiments of the present application, the "bandwidth" refers to a frequency domain bandwidth, and the "occupied bandwidth" refers to a bandwidth occupied in a frequency domain, which is generally described herein, and the following embodiments are not repeated.

As shown in fig. 7, an information transmitting and receiving method provided in the present application is applied to the foregoing first communication system, and includes the following steps:

s701, the network device determines a synchronization signal, first information, and second information.

Wherein the synchronization signal includes PSS and SSS. Optionally, the synchronization signal is shared by the wideband terminal and the narrowband terminal.

Wherein the first information is carried through a first PBCH. It will be appreciated from the foregoing that the first PBCH is the PBCH of the nrssb, and thus the synchronization signal and the first PBCH carrying the first information constitute the nrssb. Further, the first information includes MIB and a first payload. Of course, the first information may also include other information, which is not specifically limited in this application.

Note that, the information block formed by the synchronization signal and the first PBCH carrying the first information is not limited in this application, and may be referred to as an NR SSB or an SSB, and other names may be given, which are not specifically limited in this application.

Wherein the second information is carried through a second PBCH. The second PBCH is the PBCH for the narrowband terminal. The second PBCH and the first PBCH are different PBCHs in the same communication system (first communication system), and the bandwidth occupied by the second PBCH is smaller than or equal to the bandwidth occupied by the first PBCH.

Wherein the second information is different from the first information. Optionally, the second information includes some or all of the parameters of the first information, and of course, the second information may also include parameters that are not present in the first information. It should be noted that, when the second information and the first information include the same parameter, the values of the same parameter may be different.

That is, the network device may determine the NR SSB, and the second information carried by the second PBCH. The NR SSB can be used for a wideband terminal in the first communication system, and the synchronization signal of the NR SSB and the second information carried by the second PBCH are used for a narrowband terminal in the first communication system. In some embodiments, part or all of the first information carried by the first PBCH is also used for the narrowband terminal, which will be described in the following embodiments, and will not be repeated here.

Note that, the second PBCH in the present application may be an Additional (Additional) PBCH, and the two PBCHs may be replaced with each other, which is not specifically limited in the present application.

Alternatively, the synchronization signal, the first PBCH, and the second PBCH in the present application may form one information block, or the synchronization signal and the second PBCH may form one information block, and the information block may be understood as a new SSB that is different from the NR SSB, or may have other names, which is not specifically limited in the present application.

S702, the network device transmits a synchronization signal, first information, and second information. Correspondingly, the terminal equipment receives the synchronous signal, the first information and the second information from the network equipment; alternatively, the terminal device receives the synchronization signal and the second information from the network device.

It may be understood that the synchronization signal, the first information, and the second information are common information at a cell level, and in this step S702, the network device may be considered to broadcast the synchronization signal, the first information, and the second information, and the terminal device under the coverage of the network device may receive the information broadcast by the network device.

In step S702, the terminal device is a narrowband terminal, and the receiving information broadcasted by the network device includes: the terminal equipment receives the synchronous signal from the network equipment, acquires the cell identification according to the synchronous signal, and then receives the first information and the second information according to the cell identification or receives the second information according to the cell identification. The method for the terminal device to acquire the cell identifier according to the synchronization signal and then receive the information carried by the PBCH according to the cell identifier is not particularly limited, and in one implementation manner, the method can be similar to the manner in which the broadband terminal receives the NR SSB, and will not be described herein.

Optionally, when the working bandwidth of the terminal device is greater than or equal to the bandwidth occupied by the first PBCH, the terminal device receives the first information and the second information according to the cell identifier, that is, the terminal device receives the synchronization signal, the first information and the second information; and when the working bandwidth of the terminal equipment is smaller than the bandwidth occupied by the first PBCH, the terminal equipment receives the second information according to the cell identifier, namely, the terminal equipment receives the synchronous signal and the second information.

Optionally, after receiving the second information, or the first information and the second information, the terminal device may perform subsequent processing according to the received information, for example, receive SIB1 according to the first information or the second information, obtain information required for random access, and the application is not limited specifically.

Optionally, the wideband terminal in the first communication system may receive the synchronization signal and the first information carried by the first PBCH, or may receive the NR SSB, so as to implement downlink synchronization and network access in the wideband.

The following description will be made of the second information and the relevant features of the second PBCH under different operation bandwidths of the terminal device, where the following four aspects are respectively:

1. content included in the second information;

2. a time-frequency position of the second PBCH;

3. a notification mechanism for whether a second PBCH exists;

4. transmission mechanism of the second information.

The second information and the second PBCH when the operation bandwidth of the terminal device is greater than or equal to the bandwidth occupied by the first PBCH (for example, the operation bandwidth of the terminal device is 5 MHz) will be described first.

The content included in the second information is described as follows:

since the working bandwidth of the terminal equipment is larger than the bandwidth occupied by the NR SSB, the terminal equipment can completely receive the first PBCH and acquire the MIB in the first information carried by the first PBCH. As shown in the foregoing analysis in the scenario shown in fig. 3, if the PDCCH configuration, the cell prohibition instruction, or the common frequency reselection instruction of the scheduling SIB1 of the MIB in the first information is multiplexed, the configuration flexibility of the network device may be affected, and the demodulation performance of the PDCCH of the scheduling SIB1 may not be provided, or the cell prohibition instruction or the common frequency reselection instruction may not be provided for the narrowband terminal. Based on this, the second information may include at least one of the first sub information, the second sub information, the third sub information, or the fourth sub information.

For the first sub-information:

the first sub-information is used for scheduling the first SIB1, where, for example, the first sub-information may include time-frequency resource location information, repetition number, modulation coding scheme (modulation and coding scheme, MCS), redundancy version (redundancy version, RV) and the like of the first SIB1. Or, the first sub-information is used to configure a first PDCCH, which is used to schedule the first SIB1. Wherein the first SIB1 may be understood as SIB1 for the narrowband terminal.

Alternatively, when the first sub-information schedules the first SIB1, the first sub-information may also be referred to as scheduling information; the first sub-information may be used to configure the first PDCCH, and may also be referred to as PDCCH configuration information of the scheduling SIB1, and may be replaced with another PDCCH, which is not specifically limited in this application.

For the second sub-information:

the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not, or is used for indicating whether the narrowband terminal is allowed to access the cell corresponding to the second PBCH or not.

The second sub information is not the same information as the cell prohibition instruction in the MIB of the first information, and the cell prohibition instruction in the MIB of the first information is used to instruct whether the broadband terminal (or NR terminal) is allowed to access the cell corresponding to the first PBCH. The cell corresponding to the second PBCH and the cell corresponding to the first PBCH are the same cell, and two SIB1 types of first SIB1 and second SIB1 exist in the cell, wherein the first SIB1 is used for a narrowband terminal, and the second SIB1 is used for a broadband terminal.

Alternatively, the second sub information may also be referred to as cell prohibition indication information, and the second sub information and the cell prohibition indication information may be replaced with each other, which is not specifically limited in this application.

For the third sub-information:

wherein the third sub-information is used to indicate whether to allow selection of the same frequency cell of the forbidden cell. In particular, it may be used to indicate whether the terminal device allows selecting a cell with the same frequency as the forbidden cell when selecting or reselecting the cell when the highest level cell is forbidden or considered to be forbidden by the terminal device.

It should be noted that, the same-frequency reselection indication in the MIB of the third sub-information and the first information is not the same information, and the same-frequency reselection indication in the MIB of the first information is used to indicate whether to allow the broadband terminal to select the same-frequency cell of the forbidden cell.

Optionally, the third sub-information may also be referred to as co-channel reselection indication information, and the third sub-information and the co-channel reselection indication information may be replaced with each other, which is not specifically limited in this application.

For the fourth sub-information:

the fourth sub-information is used for indicating whether the system information is updated or not.

Alternatively, the fourth sub-information may include a value tag (value tag). When the network equipment sends the system information, the system information corresponds to a value tag, and the terminal equipment receives the system information and stores the system information and the value tag corresponding to the system information. When the system information changes, the value of the value tag changes, so that when the value of the value tag included in the fourth sub-information changes, the fourth sub-information can be used for indicating that the system information is updated, and when the value of the value tag does not change, the fourth sub-information can be used for indicating that the system information is not updated. Thus, after receiving the fourth sub-information, the terminal device re-receives updated system information when the value of the value tag changes from the value stored before the value tag, and does not receive system information when the value of the value tag does not change from the value stored before the value tag.

Based on the scheme, when the fourth sub-information is used for indicating the update of the system information, the terminal equipment receives the updated system information, and when the fourth sub-information is used for indicating the non-update of the system information, the terminal equipment does not need to receive the system information, so that unnecessary receiving of the system information can be reduced, and the power consumption of the terminal equipment is saved.

Alternatively, the fourth sub-information may also be referred to as system information change indication information, and the fourth sub-information and the system information change indication information may be replaced with each other, which is not specifically limited in this application.

Alternatively, the first sub information, the second sub information, or the third sub information may be understood as differentiation information from the first information, and the fourth sub information may be understood as narrowband terminal-specific indication information.

Optionally, the second information does not include a system frame number of a frame where the synchronization signal is located, or the second information does not include N high order bits of the system frame number, where N is a positive integer, for example, 6.

Note that, the synchronization signal, the first information, and the second information are located in the same frame, and therefore, the system frame number of the frame where the synchronization signal is located may also be referred to as the system frame number of the frame where the first information or the second information is located.

It may be appreciated that, since the terminal device may receive the first information, the first information may include the MIB, when the system frame number is included in the MIB, the second information may not include the system frame number, when the N high bits of the system frame number are included in the MIB, the N high bits of the system frame number may not be included in the second information, and the terminal device may multiplex the system frame number or the N high bits of the system frame number included in the MIB of the first information. In addition, the terminal device may multiplex a subcarrier interval, a subcarrier offset, a DMRS position indication, etc. included in the MIB of the first information.

In summary, the second information may include differential information compared to the first information, and furthermore, the terminal device may multiplex the non-differential information in the first information without including the non-differential information in the second information, which may reduce signaling overhead. Meanwhile, the configuration flexibility of the network equipment and the demodulation performance of the second PDCCH are not affected, and an independent cell prohibition instruction or a same-frequency reselection instruction can be provided for the narrowband terminal.

The time-frequency position of the second PBCH is described as follows:

in the following embodiments, the time-frequency position of the second PBCH will be described with reference to SSB (i.e., NR SSB) composed of the synchronization signal and the first PBCH.

In one possible implementation, the frequency domain location of the second PBCH is adjacent to, the time domain location of the SSB, and the time domain location of the second PBCH is the same as, or contained in, the time domain location of the SSB. Or, the OFDM symbol occupied by the second PBCH is part or all of the OFDM symbols occupied by the SSB.

Optionally, the frequency domain position of the second PBCH adjacent to the frequency domain position of the SSB may be: the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB.

For example, taking the case that the time domain position of the second PBCH is the same as the time domain position of the SSB, schematic diagrams of the frequency domain position of the second PBCH at the low frequency position, the high frequency position, the low frequency position, and the high frequency position of the SSB are shown in fig. 8a, 8b, and 8c, respectively, wherein the boxes filled with oblique lines represent the second PBCH.

Optionally, the relation between the frequency domain position of the second PBCH and the frequency domain position of the SSB may be predefined by a protocol, and at this time, the network device does not need to indicate the frequency domain position of the second PBCH to the terminal device, so as to save signaling overhead. Alternatively, the relationship between the frequency domain location of the second PBCH and the frequency domain location of the SSB may be determined by the network device, and at this time, the network device may send indication information to the terminal device to indicate the frequency domain location of the second PBCH.

Optionally, the network device may include fifth sub-information in the first information or the second information, where the fifth sub-information is used to indicate that the frequency domain location of the second PBCH is located at a high frequency location and/or a low frequency location of the frequency domain location of the SSB. Correspondingly, the terminal device receives the second information according to the cell identifier, and may include: and the terminal equipment determines the frequency domain position of the second PBCH according to the fifth sub-information, and receives the second information on the frequency domain position of the second PBCH according to the cell identifier.

Optionally, when the first information includes fifth sub-information, the fifth sub-information may be represented by 1 spare bit in the MIB included in the first information, for example, when the bit has a value of "1", it indicates that the fifth sub-information indicates that the frequency domain position of the second PBCH is located at a high frequency position of the frequency domain position of the SSB; when the value of the bit is "0", it indicates that the fifth sub-information indicates that the frequency domain position of the second PBCH is located at a low frequency position of the frequency domain position of the SSB. Or when the value of the bit is "0", the fifth sub-information indicates that the frequency domain position of the second PBCH is located at the high frequency position of the frequency domain position of the SSB; when the value of the bit is "1", it indicates that the fifth sub-information indicates that the frequency domain position of the second PBCH is located at a low frequency position of the frequency domain position of the SSB.

Alternatively, the fifth sub-information may be represented by 2 idle bits in the first payload included in the first information, and the values of the 2 idle bits and the contents indicated by the fifth sub-information may be as shown in table 1 below.

TABLE 1

Idle bit valuing	Content indicated by the fifth sub-information
00	Without any means for
01	The frequency domain position of the second PBCH is located at a low frequency position of the frequency domain position of the SSB
10	Frequency domain position bit of second PBCHHigh frequency location at the frequency domain location of SSB

11	The frequency domain position of the second PBCH is located at the low frequency position and the high frequency position of the frequency domain position of the SSB

It can be understood that other correspondence may exist between the values of the 2 idle bits and the content indicated by the fifth sub-information, which is not limited to table 1, and the present application does not specifically limit the present application.

Optionally, when the fifth sub-information is included in the second information, the network device and the terminal device may agree that, when the terminal device initially accesses, the frequency domain position of the second PBCH is assumed to be adjacent to one side of the frequency domain position of the SSB (i.e. located at a high frequency position or a low frequency position of the SSB), and the fifth sub-information included in the second information is carried by a portion of the second PBCH located at the adjacent side, and after the terminal device obtains the fifth sub-information on the adjacent side according to the assumption, if the fifth sub-information indicates that the frequency domain position of the second PBCH is adjacent to both sides of the frequency domain position of the SSB (i.e. located at the high frequency position and the low frequency position of the SSB), the terminal device may receive in a frequency hopping manner when subsequently receiving the second information, so as to obtain the frequency diversity gain.

Alternatively, in some embodiments, the time-frequency location of the second PBCH in this implementation may also be described as: the frequency domain position of the second PBCH is adjacent to the frequency domain position of the first PBCH, and the time domain position of the second PBCH is the same as or contained in the first time domain position, wherein the first time domain position includes the time domain position of the synchronization signal and the time domain position of the first PBCH. At this time, the above-mentioned related features of the time-frequency position of the second PBCH described with reference to the SSB composed of the synchronization signal and the first PBCH may also be appropriately modified and applied to the description, which is not repeated herein.

Based on the possible implementation manner, the time domain position of the second PBCH is contained in the time domain position of the SSB formed by the synchronous signal and the first PBCH, the frequency domain position is adjacent to the frequency domain position of the SSB, and the influence of the second PBCH on the energy-saving mechanism of the network equipment is reduced in a frequency division multiplexing mode. The energy-saving mechanism of the network device means that the network device can switch off other OFDM symbols except for the OFDM symbols occupied by the public signals which must be transmitted by SSB and the like under the condition that the system has no service, namely, the network device can not transmit any content on the OFDM symbols when the system has no service, and switch off the radio frequency module, thereby achieving the purpose of saving the power consumption of the network device. In this implementation, the time domain position of the second PBCH is included in the time domain position of the NR SSB, and the OFDM symbol level turn-off is not performed at the time domain position outside the SSB by the network device, i.e. the energy saving mechanism of the network device is not affected.

In another possible implementation, the time domain position of the second PBCH is adjacent to the time domain position of the SSB (i.e., the NR SSB) composed of the synchronization signal and the first PBCH, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB. Or, the bandwidth occupied by the second PBCH is smaller than or equal to the bandwidth occupied by the SSB, or, the bandwidth occupied by the second PBCH is a part or all of the bandwidths occupied by the SSB.

Optionally, the number of OFDM symbols occupied by the second PBCH is smaller than the number of OFDM symbols occupied by the SSB.

Alternatively, the time domain position of the second PBCH adjacent to the time domain position of the SSB may be: the time domain position of the second PBCH is located before and/or after the time domain position of the SSB.

For example, taking the frequency domain position of the second PBCH as the same as the frequency domain position of the SSB, the second PBCH occupies 2 OFDM symbols as an example, schematic diagrams of the time domain position of the second PBCH before, after, before and after the time domain position of the SSB are shown in fig. 9a, 9b and 9c, respectively, wherein the boxes filled with diagonal lines represent the second PBCH.

Alternatively, the determination of the relationship between the time domain position of the second PBCH and the time domain position of the SSB may be as follows:

in the first case, the relation between the time domain position of the second PBCH and the time domain position of the SSB may be predefined by a protocol, and at this time, the network device does not need to indicate the time domain position of the second PBCH to the terminal device, so as to save signaling overhead.

The relationship between the time domain position of the second PBCH and the time domain position of the SSB may be determined by the network device, and at this time, the network device may send indication information to the terminal device to indicate the time domain position of the second PBCH.

Optionally, the network device may include fifth sub-information in the first information, where the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB. Correspondingly, the terminal device receives the second information according to the cell identifier, and may include: and the terminal equipment determines the time domain position of the second PBCH according to the fifth sub-information and receives the second information at the time domain position of the second PBCH according to the cell identifier.

Alternatively, the fifth sub-information may be represented by 1 idle bit in the MIB included in the first information, or may be represented by 2 idle bits in the first payload included in the first information, and the related description for indicating the frequency domain position of the second PBCH by referring to the fifth sub-information is not repeated herein.

In case three, the relationship between the time domain position of the second PBCH and the time domain position of the SSB is related to the time domain position of the SSB.

Optionally, if there is a free time domain resource adjacent to the time domain location of the SSB before the time domain location of the SSB, the time domain location of the second PBCH is located before and adjacent to the time domain location of the SSB; if there is a free time domain resource adjacent to the time domain location of the SSB after the time domain location of the SSB, the time domain location of the second PBCH is located after the time domain location of the SSB and adjacent to the time domain location of the SSB; if there are free time domain resources adjacent to the time domain location of the SSB both before and after the time domain location of the SSB, the time domain location of the second PBCH is located before and after the time domain location of the SSB and adjacent to the time domain location of the SSB.

Alternatively, in some embodiments, the time-frequency location of the second PBCH in this implementation may also be described as: the time domain position of the second PBCH is adjacent to the second time domain position, which comprises the time domain position of the synchronization signal and/or the time domain position of the first PBCH, and the frequency domain position of the second PBCH is the same as or comprised in the frequency domain position of the first PBCH. At this time, the above-mentioned related features of the time-frequency position of the second PBCH described with reference to the SSB composed of the synchronization signal and the first PBCH may also be appropriately modified and applied to the description, which is not repeated herein.

Based on the possible implementation manner, the time domain position of the second PBCH is different from the time domain position of the SSB formed by the synchronization signal and the first PBCH, so that the occupation of spectrum resources can be reduced in a time division multiplexing manner.

The notification mechanism of whether the second PBCH is present is described as follows:

in a possible implementation, the terminal device may be explicitly informed by signaling that the second PBCH is present in the first communication system.

Optionally, the first information may include sixth sub-information, where the sixth sub-information may be used to indicate any one of the following:

a second PBCH exists in the first communication system;

The cell corresponding to the second PBCH is a non-forbidden cell;

the second PBCH exists in the first communication system, and a cell corresponding to the second PBCH is a non-forbidden cell.

In this application, the presence of the second PBCH corresponds to the presence of the second information, and therefore, when the sixth sub-information is used to indicate that the second PBCH is present in the first communication system, the sixth sub-information is also used to indicate that the second information is present in the first communication system, or that the network device has sent the second information carried by the second PBCH.

Optionally, the sixth sub-information is used to indicate that the narrowband terminal is allowed to access the cell corresponding to the second PBCH when the cell corresponding to the second PBCH is a non-forbidden cell. At this time, the second information may not include the second sub-information, so that signaling overhead occupied by the second sub-information may be saved.

Optionally, in this case, the terminal device receives the first information and the second information according to the cell identifier, and may include: the terminal equipment receives the first information according to the cell identifier, and then receives the second information according to the sixth sub-information included in the first information, namely the terminal equipment can firstly receive the first information, and when the sixth sub-information included in the first information indicates that the second PBCH exists in the first communication system and/or the cell corresponding to the second PBCH is a non-forbidden cell, the second information is received.

It may be understood that, when the sixth sub-information is only used to indicate that the cell corresponding to the second PBCH is a non-forbidden cell, after confirming that the terminal device is allowed to access the cell corresponding to the second PBCH according to the sixth sub-information, if the terminal device needs to access the cell, the terminal device needs to first receive the second information, and at this time, the terminal device may also be considered to receive the second information according to the sixth sub-information.

Optionally, in some implementations of the present application, a case may occur in which the second PBCH is defined in the protocol, but the second PBCH is not present in the first communication system, or the network device does not send the second information, where the sixth sub-information may be used to indicate any one of the following:

the second PBCH is not present in the first communication system;

the cell corresponding to the second PBCH is a forbidden cell;

the second PBCH does not exist in the first communication system, and a cell corresponding to the second PBCH is a forbidden cell.

In this application, the absence of the second PBCH corresponds to the absence of the second information, and therefore, when the sixth sub-information is used to indicate that the second PBCH is not present in the first communication system, the sixth sub-information is also used to indicate that the second information is not present in the first communication system, or that the sixth sub-information is used to indicate that the network device does not send the second information carried by the second PBCH.

Optionally, the sixth sub-information is used to indicate that when the cell corresponding to the second PBCH is a forbidden cell, the narrowband terminal is forbidden to access the cell corresponding to the second PBCH. At this time, even if the network device transmits the second information, it is impossible for the terminal device to access the cell, and therefore, in this case, the network device may not transmit the second information, and correspondingly, the terminal device does not receive the second information, thereby saving signaling overhead.

Optionally, the reason why the second PBCH is not present in the first system or the network device does not send the second information may be one or more of the following: for the narrowband terminal, the cell corresponding to the second PBCH is in a maintenance period, and the access of the narrowband terminal is forbidden; the network equipment has higher load, preferentially ensures the access of the broadband terminal, prohibits the access of the narrowband terminal, and the like. Of course, there may be other reasons for which the present application is not particularly limited.

Optionally, in this case, after the terminal device receives the first information according to the identifier of the cell, when the sixth sub-information indicates that the second PBCH does not exist in the first communication system and/or the cell corresponding to the second PBCH is a forbidden cell, the terminal device may not receive the second information, so that power consumption waste of the terminal device is avoided.

Optionally, the sixth sub-information may be represented by 1 idle bit in the MIB included in the first information, for example, when the bit has a value of "1", it indicates that the sixth sub-information indicates that the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell. When the value of the bit is "0", it indicates that the sixth sub-information indicates that the second PBCH does not exist in the first communication system and/or the cell corresponding to the second PBCH is a forbidden cell.

Alternatively, the sixth sub-information may be represented by 2 idle bits in the first payload included in the first information, and the values of the 2 idle bits and the content indicated by the sixth sub-information may be as shown in table 2 below.

TABLE 2

Idle bit valuing	Content indicated by the sixth sub-information
00	The first communication system does not have a second PBCH, and the cell corresponding to the second PBCH is a forbidden cell
01	Absence of second PBCH in first communication system
10	The presence of a second PBCH in a first communication system
11	A second PBCH exists in the first communication system, and a cell corresponding to the second PBCH is a non-forbidden cell

It is to be understood that other correspondence may exist between the values of the 2 idle bits and the content indicated by the sixth sub-information, which is not limited to table 2, and the present application is not limited to this specific example.

Based on the scheme, the terminal equipment receives the second information when the sixth sub-information indicates that the second PBCH and/or the cell corresponding to the second PBCH exist in the first communication system and is a non-forbidden cell, and does not receive the second information when the sixth sub-information indicates that the second PBCH and/or the cell corresponding to the second PBCH do not exist in the first communication system and is a forbidden cell, so that the network equipment side is more flexible to realize, the terminal equipment can receive or not receive the second information according to the sixth sub-information, blind reception can be avoided when the network equipment does not send the second information, and power consumption of the terminal equipment is reduced.

In another possible implementation, the terminal device may be implicitly informed that the second PBCH is present in the first communication system.

Optionally, the first information may include seventh sub-information, where the seventh sub-information indicates a number of RBs occupied by CORESET corresponding to the second PDCCH, and when the number of RBs is greater than the first threshold, it indicates that the second PBCH exists in the first communication system.

Alternatively, the bandwidth of the first threshold RB is smaller than but close to the operating bandwidth of the terminal device, for example, the first threshold may be 24; alternatively, the bandwidth of the first threshold number of RBs is greater than the operating bandwidth of the terminal device.

Optionally, the seventh sub-information may be configuration information of PDCCH of scheduling SIB1 carried in the pdfch-ConfigSIB 1 field in the MIB included in the first information.

Optionally, in this case, the terminal device receives the first information and the second information according to the cell identifier, and may include: the terminal equipment receives the first information according to the cell identifier, then determines the number of RBs occupied by CORESET corresponding to the second PDCCH according to seventh sub-information included in the first information, determines that a second PBCH exists in the first communication system when the number of RBs is larger than a first threshold value, and receives the second information.

Optionally, when the number of RBs occupied by CORESET corresponding to the second PDCCH is less than or equal to the first threshold, the second PBCH may not exist in the first communication system, or the network device may not exist second information, where the narrowband terminal and the wideband terminal share the synchronization signal and the first PBCH.

Based on the possible implementation manner, whether the second PBCH exists in the system is implicitly indicated through the RB number occupied by the CORST corresponding to the second PDCCH, so that signaling overhead can be reduced, meanwhile, the terminal equipment can firstly determine whether the second PBCH exists or not, and does not receive the second information when the second PBCH does not exist, so that waste of terminal power consumption is reduced.

The transmission mechanism of the second information is described as follows:

in one possible implementation, the first information and the second information are encoded before the network device transmits the first information and the second information.

Alternatively, the network device may encode the first information according to a first cyclic redundancy check (cyclic redundancy check, CRC) to obtain encoded first information, and may encode the second information according to a second CRC to obtain encoded second information. Wherein the number of bits of the first CRC is different from the number of bits of the second CRC.

Alternatively, the number of bits of the first CRC is greater than the number of bits of the second CRC, e.g., the number of bits of the first CRC is 24 and the bits of the second CRC are 16. When the second information is coded and modulated by the second CRC with a smaller number of bits, more bits may be used for the second information, i.e. the second information may include more contents or parameters.

Optionally, the network device encodes the first information according to the first CRC, which may include: the network device generates a first CRC, attaches the first CRC after a Transport Block (TB) corresponding to the first information, and encodes the TB corresponding to the first information and the first CRC to obtain encoded first information. Similarly, the network device encoding the second information according to the second CRC may include: the network equipment generates a second CRC, attaches the second CRC after the TB corresponding to the second information, and encodes the TB corresponding to the second information and the second CRC to obtain encoded second information.

It should be noted that, the TB corresponding to the first information is the TB including the first information, and the TB corresponding to the second information is the TB including the second information.

Alternatively, the network device may generate the first CRC according to the first CRC generator polynomial, and generate the second CRC according to the second CRC generator polynomial.

Accordingly, in this implementation, the network device sending the first information and the second information may include: the network device transmits the encoded first information and the encoded second information.

Optionally, in this implementation manner, the terminal device receives the first information and the second information according to the cell identifier, and may include: the terminal equipment receives the encoded first information and the encoded second information according to the cell identifier, then performs CRC (cyclic redundancy check) on the encoded first information according to the first CRC to obtain the first information, and performs CRC on the encoded second information according to the second CRC to obtain the second information.

Optionally, the terminal device performs CRC check on the encoded first information according to the first CRC to obtain first information, which may include: the terminal equipment decodes the encoded first information to obtain first decoded information containing a first CRC, performs CRC on the first decoded information by using the first CRC, and obtains the first information according to the first decoded information after the check is successful. Similarly, the terminal device performs CRC check on the encoded second information according to the second CRC to obtain second information, which may include: the terminal equipment decodes the encoded second information to obtain second decoded information containing second CRC, and uses the second CRC to carry out CRC check on the second decoded information, and after the check is successful, the second information is obtained according to the second decoded information.

Alternatively, the first CRC and the second CRC used by the terminal device may be generated by the terminal device, where the first CRC generated by the terminal device is the same as the first CRC generated by the network device, and the second CRC generated by the terminal device is the same as the second CRC generated by the network device. Based on the possible implementation manner, the second information is coded and modulated by using a CRC check mode, and the performance of the second PBCH is ensured through the stronger error detection capability of the CRC. In addition, the CRC system message is smaller, the use is simple, and the implementation complexity of the scheme can be reduced.

In another possible implementation, the second information may be represented by a sequence.

Alternatively, the sequence representing the second information may be a long sequence occupying one or more OFDM symbols, or a plurality of short sequences, each occupying one OFDM symbol. Alternatively, the sequence representing the second information may be a product of different types of sequences.

It is understood that the number of OFDM symbols occupied by the sequence representing the second information is less than or equal to the total number of OFDM symbols occupied by the first PBCH and the synchronization signal. The different sequence represents different second information.

Alternatively, the long sequence or short sequence may be a Zadoff-Chu sequence, an m sequence, a gold sequence, etc., and the type of the sequence is not particularly limited in this application.

Based on the possible implementation manner, the second information carried by the second PBCH is represented by the sequence, and the terminal equipment does not need to carry out complex decoding operation when receiving the second information, and the processing complexity of the terminal equipment can be reduced through simple correlation operation, so that the requirement on hardware of the terminal equipment is reduced, and the cost of the terminal equipment is further reduced.

The above description is related to the case where the working bandwidth of the terminal device is greater than the bandwidth occupied by the first PBCH, and the following description is made on the second information and the second PBCH when the working bandwidth of the terminal device is less than the bandwidth occupied by the first PBCH.

The content included in the second information is described as follows:

because the working bandwidth of the terminal equipment is smaller than the bandwidth occupied by the first PBCH, the terminal equipment cannot receive the first information borne by the first PBCH, and therefore, the second information comprises parameters necessary for the terminal equipment to access the network equipment, namely the system frame number of the frame where the synchronization signal is located or N high-order bits of the system frame number. In addition, the second information may further include one or more of the foregoing subcarrier spacing, subcarrier offset, DMRS position indication, first sub information, second sub information, third sub information, and fourth sub information.

Based on the scheme, when the narrowband terminal cannot receive the first information carried on the first PBCH, the second information includes the system frame number of the frame where the synchronization signal is located or N high-order bits of the system frame number, so that the narrowband terminal can acquire the system frame number or N high-order bits thereof, and further processes are performed according to the system frame number or N high-order bits thereof, for example, the subsequent system information and paging information are received, and random access is initiated.

The time-frequency position of the second PBCH is described as follows:

In one possible implementation, the frequency domain location of the second PBCH is adjacent to, the time domain location of the SSB, and the time domain location of the second PBCH is the same as, or contained in, the time domain location of the SSB.

In another possible implementation, the time domain position of the second PBCH is adjacent to the time domain position of the SSB consisting of the synchronization signal and the first PBCH, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.

In the case that the working bandwidth of the terminal device is greater than the bandwidth occupied by the first PBCH, the time-frequency location specification of the second PBCH may be appropriately modified to be suitable for this. For example, the relationship between the time domain position or the frequency domain position of the second PBCH and the time domain position or the frequency domain position of the SSB formed by the synchronization signal and the first PBCH may be predefined by a protocol, or may be indicated by the network device to the terminal device, where the indication may be carried in other broadcast information sent before the second information is sent, because the terminal device cannot receive the first information, which is not specifically limited in this application.

in a possible implementation, the terminal device may be explicitly informed by signaling that the second PBCH is present in the first communication system. Unlike when the operation bandwidth of the terminal device is greater than the first PBCH, the terminal device cannot receive the first information, and thus, the signaling may be transmitted before other broadcast information transmitted before the second information is transmitted, which is not specifically limited in this application.

In another possible implementation, the terminal device may be implicitly informed that the second PBCH is present in the first communication system. The description of the above-mentioned terminal device when the operation bandwidth is greater than that of the first PBCH will not be repeated here.

The transmission mechanism of the second information is described as follows:

the transmission mechanism of the second information is similar to that of the second information when the working bandwidth of the terminal device is greater than that of the first PBCH, and reference is made to the above description, which is not repeated herein.

Furthermore, in some implementations of the present application, the ratio between the energy per resource element (energy per resource element, EPRE) of the second PBCH and the EPRE of the SSS included in the synchronization signal is X decibels (dB), and X is greater than or equal to 0, regardless of whether the operating bandwidth of the terminal device is greater than the bandwidth of the first PBCH. Based on the scheme, in the NR system, the SSS and the first PBCH have the same EPRE, namely, the ratio between the EPRE of the first PBCH and the EPRE of the SSS is 0dB, so that when X is larger than 0, the EPRE of the second PBCH is larger than the EPRE of the first PBCH, namely, the transmitting power of the second PBCH is higher, and better coverage performance can be achieved compared with the first PBCH.

In summary, in the first communication system, the network device sends a synchronization signal, first information, and second information, where the first information is carried through a first PBCH and the second information is carried through a second PBCH. The narrowband terminal may receive the first PBCH and the second PBCH, or receive the second PBCH according to its working bandwidth, so as to receive the first information and the second information, or receive the second information, so as to perform subsequent processing, for example, downlink synchronization, initiate random access, and so on. In addition, the broadband terminal in the first communication system can receive the synchronization signal and the first information carried by the first PBCH, so that the synchronization and network access of the broadband terminal are realized, and the integrity of the system is ensured.

In the above method embodiment, the actions of the network device may be called by the processor 201 in the network device 20 shown in fig. 6 to call the application program code stored in the memory 202 to instruct the network device to execute; in the above embodiment of the method, the action of the terminal device may be called by the processor 301 in the terminal device 30 shown in fig. 6 to instruct the terminal device to execute the application program code stored in the memory 302, which is not limited in this embodiment.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

It will be appreciated that in the above embodiments, the method and/or steps implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) that may be used in the terminal device, and the method and/or steps implemented by the network device may also be implemented by a component that may be used in the network device.

The above description has been presented mainly from the point of interaction between the network elements. Correspondingly, the embodiment of the application also provides a communication device which is used for realizing the various methods. The communication device may be a terminal device in the above method embodiment, or a device including the above terminal device, or a component that may be used for the terminal device; alternatively, the communication apparatus may be a network device in the above method embodiment, or an apparatus including the above network device, or be a component that may be used in the network device. It will be appreciated that the communication device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules performing the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the functional modules of the communication device may be divided according to the above embodiment of the method, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

For example, the communication apparatus is taken as an example of the network device in the above-mentioned method embodiment. Fig. 10 shows a schematic diagram of a network device 100. The network device 100 comprises a processing module 1001 and a transceiver module 1002. The transceiver module 1002, which may also be referred to as a transceiver unit, is configured to perform a transmitting and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, or a communication interface.

Optionally, the network device 100 may further comprise a storage module (not shown in fig. 10) for storing program instructions and data.

Optionally, the transceiver module 1002 may include a receiving module and a transmitting module, which are configured to perform the steps of receiving and transmitting the class performed by the network device in the foregoing method embodiment, respectively; the processing module 1001 may be configured to perform the steps of the processing class (e.g., determining, acquiring, etc.) performed by the network device in the method embodiment described above.

The processing module 1001 is configured to determine a synchronization signal, first information, and second information, where the first information is carried through a first PBCH, the second information is carried through a second PBCH, and the first information and the second information are different; the transceiver module 1002 is configured to send the synchronization signal, the first information, and the second information.

Optionally, the processing module 1001 is further configured to encode the first information according to a first CRC to obtain encoded first information, and encode the second information according to a second CRC to obtain encoded second information, where the number of bits of the first CRC is different from the number of bits of the second CRC; the transceiver module 1002 is specifically configured to send the encoded first information and the encoded second information.

All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

In the present embodiment, the network device 100 is presented in a form in which respective functional modules are divided in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, one skilled in the art will recognize that the network device 100 may take the form of the network device 20 shown in FIG. 6.

For example, the processor 201 in the network device 20 shown in fig. 6 may cause the network device 20 to perform the method in the above-described method embodiment by calling computer-executable instructions stored in the memory 202.

Specifically, the functions/implementation procedures of the processing module 1001 and the transceiver module 1002 in fig. 10 may be implemented by the processor 201 in the network device 20 shown in fig. 6 calling computer-executable instructions stored in the memory 202. Alternatively, the functions/implementation of the processing module 1001 in fig. 10 may be implemented by the processor 201 in the network device 20 shown in fig. 6 calling computer-executable instructions stored in the memory 202, and the functions/implementation of the transceiver module 1002 in fig. 10 may be implemented by the transceiver 203 in the network device 20 shown in fig. 6.

Since the network device 100 provided in this embodiment may perform the method in the above method embodiment, the technical effects that can be obtained by the network device may refer to the above method embodiment, and will not be described herein.

Or, for example, the communication device is taken as an example of the terminal device in the above method embodiment. Fig. 11 shows a schematic structural diagram of a terminal device 110. The terminal device 110 comprises a processing module 1101 and a transceiver module 1102. The transceiver module 1102, which may also be referred to as a transceiver unit, is configured to perform a transmitting and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, or a communication interface.

Optionally, the terminal device 110 may further comprise a storage module (not shown in fig. 11) for storing program instructions and data.

Optionally, the transceiver module 1102 may include a receiving module and a transmitting module, which are respectively configured to perform the steps of receiving and transmitting the class performed by the terminal device in the foregoing method embodiment; the processing module 1101 may be configured to perform the steps of the processing classes (e.g., determining, obtaining, etc.) performed by the terminal device in the method embodiments described above.

The transceiver module 1102 is configured to receive a synchronization signal from a network device; a processing module 1101, configured to obtain a cell identifier according to the synchronization signal; the transceiver module 1102 is further configured to receive first information and second information according to a cell identifier, or receive second information according to a cell identifier, where the first information is carried by a first PBCH, the second information is carried by a second PBCH, and the first information and the second information are different.

Optionally, the transceiver module 1102 is specifically configured to receive the encoded first information and the encoded second information according to the cell identifier; the processing module 1101 is further configured to perform CRC check on the encoded first information according to the first CRC to obtain first information, and perform CRC check on the encoded second information according to the second CRC to obtain second information, where the number of bits of the first CRC is different from the number of bits of the second CRC.

In the present embodiment, the terminal device 110 is presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate that the terminal device 110 may take the form of the terminal device 30 shown in fig. 6.

For example, the processor 301 in the terminal device 30 shown in fig. 6 may cause the terminal device 30 to execute the method in the above-described method embodiment by calling the computer-executable instructions stored in the memory 302.

In particular, the functions/implementation procedures of the processing module 1101 and the transceiver module 1102 in fig. 11 may be implemented by the processor 301 in the terminal device 30 shown in fig. 6 invoking computer executable instructions stored in the memory 302. Alternatively, the function/implementation procedure of the processing module 1101 in fig. 11 may be implemented by the processor 301 in the terminal device 30 shown in fig. 6 invoking a computer executable instruction stored in the memory 302, and the function/implementation procedure of the transceiver module 1102 in fig. 11 may be implemented by the transceiver 303 in the terminal device 30 shown in fig. 6.

Since the terminal device 110 provided in this embodiment may perform the method in the above method embodiment, the technical effects that can be obtained by the terminal device may refer to the above method embodiment, and will not be described herein.

Optionally, embodiments of the present application further provide a communication device (for example, the communication device may be a chip or a chip system), where the communication device includes a processor, and the method is used to implement any of the method embodiments described above. In one possible design, the communication device further includes a memory. The memory for storing the necessary program instructions and data, and the processor may invoke the program code stored in the memory to instruct the communication device to perform the method of any of the method embodiments described above. Of course, the memory may not be in the communication device. In another possible design, the communication device further includes an interface circuit, which is a code/data read/write interface circuit, for receiving computer-executable instructions (the computer-executable instructions being stored in a memory, possibly read directly from the memory, or possibly through other devices) and transmitting to the processor. When the communication device is a chip system, the communication device may be formed by a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like. In an embodiment of the present application, the computer may include the apparatus described above.

Although the present application has been described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the figures, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

An information transmission method, wherein the method is applied to a first communication system, the method comprising:

the network equipment determines a synchronous signal, first information and second information, wherein the first information is carried by a first Physical Broadcast Channel (PBCH), the second information is carried by a second PBCH, and the first information is different from the second information;

the network device transmits the synchronization signal, the first information, and the second information.
The method of claim 1, wherein the second information comprises at least one of:

the method comprises the steps of first sub-information, wherein the first sub-information is used for scheduling a first system information block SIB1 or configuring a first physical downlink control channel PDCCH, and the first PDCCH is used for scheduling the first SIB1;

the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not;

third sub-information for indicating whether to allow selection of the same-frequency cell of the forbidden cell;

and fourth sub-information for indicating whether the system information is updated.
The method according to claim 1 or 2, wherein the first information includes a system frame number of a frame in which the synchronization signal is located, and the second information does not include the system frame number;

Or,

the first information includes N high-order bits of the system frame number, and the second information does not include N high-order bits of the system frame number, N being a positive integer.
The method according to claim 1 or 2, wherein the second information includes a system frame number of a frame in which the synchronization signal is located or N high-order bits of the system frame number, N being a positive integer.
The method according to any of claims 1-4, wherein the synchronization signal and the first PBCH constitute a synchronization signal/physical broadcast channel block SSB;

the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, and the time domain position of the second PBCH is the same as or included in the time domain position of the SSB;

alternatively, the time domain position of the second PBCH is adjacent to the time domain position of the SSB, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.
The method of claim 5, wherein the first information comprises fifth sub-information;

when the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, the fifth sub-information is used for indicating that the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB;

When the time domain position of the second PBCH is adjacent to the time domain position of the SSB, the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB.
The method of any of claims 1-6, wherein the first information includes sixth sub-information, the sixth sub-information being used to indicate: and the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell.
The method according to any of claims 1-6, wherein the first information comprises seventh sub-information, the seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to a second PDCCH, the second PBCH being present in the first communication system when the number is greater than a first threshold, the second PDCCH being used for scheduling a second SIB1.
The method of any of claims 1-8, wherein the network device transmitting the first information and the second information comprises:

the network equipment encodes the first information according to a first Cyclic Redundancy Check (CRC) code to obtain encoded first information, and encodes the second information according to a second CRC code to obtain encoded second information, wherein the bit number of the first CRC code is different from the bit number of the second CRC code;

The network device transmits the encoded first information and the encoded second information.
The method according to any one of claims 1-8, wherein the second information is represented by a sequence.
The method according to any of the claims 1-10, wherein the synchronization signal comprises a secondary synchronization signal SSS, the ratio between the energy per resource element EPRE of the second PBCH and the EPRE of the SSS being X db, X being greater than or equal to 0.
The method according to any of claims 1-11, wherein the bandwidth occupied by the second PBCH is smaller than the bandwidth occupied by the first PBCH.
An information receiving method, wherein the method is applied to a first communication system, the method comprising:

the terminal equipment receives a synchronous signal from the network equipment;

the terminal equipment acquires a cell identifier according to the synchronous signal;

the terminal equipment receives first information and second information according to the cell identifier, or receives second information according to the cell identifier, wherein the first information is carried by a first Physical Broadcast Channel (PBCH), the second information is carried by a second PBCH, and the first information is different from the second information.
The method of claim 13, wherein the second information comprises at least one of:

the method comprises the steps of first sub-information, wherein the first sub-information is used for scheduling a first system information block SIB1 or configuring a first physical downlink control channel PDCCH, and the first PDCCH is used for scheduling the first SIB1;

the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not;

third sub-information for indicating whether to allow selection of the same-frequency cell of the forbidden cell;

and fourth sub-information for indicating whether the system information is updated.
The method according to claim 13 or 14, wherein the first information includes a system frame number of a frame in which the synchronization signal is located, and the second information does not include the system frame number;

or,

the first information includes N high-order bits of the system frame number, and the second information does not include N high-order bits of the system frame number, N being a positive integer.
The method according to claim 13 or 14, wherein the second information includes a system frame number of a frame in which the synchronization signal is located or N high-order bits of the system frame number, N being a positive integer.
The method according to any of claims 13-16, wherein the synchronization signal and the first PBCH constitute a synchronization signal/physical broadcast channel block SSB;

the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, and the time domain position of the second PBCH is the same as or included in the time domain position of the SSB;

alternatively, the time domain position of the second PBCH is adjacent to the time domain position of the SSB, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.
The method of claim 17, wherein the first information comprises fifth sub-information;

when the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, the fifth sub-information is used for indicating that the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB;

when the time domain position of the second PBCH is adjacent to the time domain position of the SSB, the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB.
The method according to any of claims 13-18, wherein the first information comprises a sixth sub-information indicating: and the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell.
The method according to any of claims 13-18, wherein the first information comprises a seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to a second PDCCH, the number being greater than a first threshold, the second PBCH being present in the first communication system, the second PDCCH being used for scheduling a second SIB1.
The method according to any of claims 13-20, wherein the terminal device receives the first information and the second information according to the cell identity, comprising:

the terminal equipment receives the encoded first information and the encoded second information according to the cell identifier;

the terminal equipment performs CRC (cyclic redundancy check) on the encoded first information according to a first CRC to obtain the first information, and performs CRC on the encoded second information according to a second CRC to obtain the second information, wherein the bit number of the first CRC is different from the bit number of the second CRC.
The method according to any of claims 13-20, wherein the second information is represented by a sequence.
The method according to any of the claims 13-22, wherein the synchronization signal comprises a secondary synchronization signal SSS, the ratio between the energy per resource element EPRE of the second PBCH and the EPRE of the SSS being X db, X being greater than or equal to 0.
The method of any of claims 13-23, wherein the second PBCH occupies less bandwidth than the first PBCH.
A communication device for a first communication system, the communication device comprising: a processing module and a receiving-transmitting module;

the processing module is configured to determine a synchronization signal, first information, and second information, where the first information is carried through a first physical broadcast channel PBCH, the second information is carried through a second PBCH, and the first information is different from the second information;

the receiving and transmitting module is configured to transmit the synchronization signal, the first information, and the second information.
The communication apparatus of claim 25, wherein the second information comprises at least one of:

the method comprises the steps of first sub-information, wherein the first sub-information is used for scheduling a first system information block SIB1 or configuring a first physical downlink control channel PDCCH, and the first PDCCH is used for scheduling the first SIB1;

the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not;

third sub-information for indicating whether to allow selection of the same-frequency cell of the forbidden cell;

And fourth sub-information for indicating whether the system information is updated.
The communication apparatus according to claim 25 or 26, wherein the first information includes a system frame number of a frame in which the synchronization signal is located, and the second information does not include the system frame number;

or,

the first information includes N high-order bits of the system frame number, and the second information does not include N high-order bits of the system frame number, N being a positive integer.
The communication apparatus according to claim 25 or 26, wherein the second information includes a system frame number of a frame in which the synchronization signal is located or N high-order bits of the system frame number, N being a positive integer.
The communication apparatus according to any of claims 25-28, wherein the synchronization signal and the first PBCH constitute a synchronization signal/physical broadcast channel block SSB;

the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, and the time domain position of the second PBCH is the same as or included in the time domain position of the SSB;

alternatively, the time domain position of the second PBCH is adjacent to the time domain position of the SSB, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.
The communication apparatus of claim 29, wherein the first information comprises fifth sub-information;

when the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, the fifth sub-information is used for indicating that the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB;

when the time domain position of the second PBCH is adjacent to the time domain position of the SSB, the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB.
The communication apparatus according to any one of claims 25-30, wherein the first information includes sixth sub-information for indicating: and the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell.
The communication apparatus according to any of claims 25-30, wherein the first information comprises seventh sub-information, the seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to a second PDCCH, the second PBCH being present in the first communication system when the number is greater than a first threshold, the second PDCCH being used for scheduling a second SIB1.
The communication device according to any of the claims 25-32, wherein,

the processing module is further configured to encode the first information according to a first Cyclic Redundancy Check (CRC) to obtain encoded first information, and encode the second information according to a second CRC to obtain encoded second information, where the number of bits of the first CRC is different from the number of bits of the second CRC;

the transceiver module is specifically configured to send the encoded first information and the encoded second information.
A communication device according to any of claims 25-32, wherein the second information is represented by a sequence.
The communication apparatus according to any of claims 25-34, wherein the synchronization signal comprises a secondary synchronization signal SSS, wherein a ratio between energy per resource element EPRE of the second PBCH and EPRE of the SSS is X db, X being greater than or equal to 0.
The communications apparatus of any one of claims 25-35, wherein the second PBCH occupies less bandwidth than the first PBCH.
A communication device for a first communication system, the communication device comprising: a processing module and a receiving-transmitting module;

The receiving and transmitting module is used for receiving the synchronous signals from the network equipment;

the processing module is used for acquiring a cell identifier according to the synchronous signal;

the transceiver module is further configured to receive first information and second information according to the cell identifier, or receive second information according to the cell identifier, where the first information is carried by a first physical broadcast channel PBCH, the second information is carried by a second PBCH, and the first information is different from the second information.
The communication apparatus of claim 37, wherein the second information comprises at least one of:

the method comprises the steps of first sub-information, wherein the first sub-information is used for scheduling a first system information block SIB1 or configuring a first physical downlink control channel PDCCH, and the first PDCCH is used for scheduling the first SIB1;

the second sub-information is used for indicating whether the cell corresponding to the second PBCH is a forbidden cell or not;

third sub-information for indicating whether to allow selection of the same-frequency cell of the forbidden cell;

and fourth sub-information for indicating whether the system information is updated.
The communication apparatus according to claim 37 or 38, wherein the first information includes a system frame number of a frame in which the synchronization signal is located, and the second information does not include the system frame number;

or,

the first information includes N high-order bits of the system frame number, and the second information does not include N high-order bits of the system frame number, N being a positive integer.
The communication apparatus according to claim 37 or 38, wherein the second information includes a system frame number of a frame in which the synchronization signal is located or N high-order bits of the system frame number, N being a positive integer.
The communication apparatus according to any of claims 37-40, wherein the synchronization signal and the first PBCH constitute a synchronization signal/physical broadcast channel block SSB;

the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, and the time domain position of the second PBCH is the same as or included in the time domain position of the SSB;

alternatively, the time domain position of the second PBCH is adjacent to the time domain position of the SSB, and the frequency domain position of the second PBCH is the same as or included in the frequency domain position of the SSB.
The communication device of claim 41, wherein the first information includes fifth sub-information;

when the frequency domain position of the second PBCH is adjacent to the frequency domain position of the SSB, the fifth sub-information is used for indicating that the frequency domain position of the second PBCH is located at a high frequency position and/or a low frequency position of the frequency domain position of the SSB;

when the time domain position of the second PBCH is adjacent to the time domain position of the SSB, the fifth sub-information is used to indicate that the time domain position of the second PBCH is located before and/or after the time domain position of the SSB.
The communication apparatus according to any one of claims 37-42, wherein the first information includes sixth sub-information indicating: and the second PBCH exists in the first communication system and/or a cell corresponding to the second PBCH is a non-forbidden cell.
The communications apparatus of any one of claims 37-42, wherein the first information includes seventh sub-information indicating a number of resource blocks occupied by a control resource set CORESET corresponding to a second PDCCH, the second PBCH being present in the first communications system when the number is greater than a first threshold, the second PDCCH being used to schedule a second SIB1.
The communication device of any of claims 37-44, wherein,

the receiving and transmitting module is specifically configured to receive the encoded first information and the encoded second information according to the cell identifier;

the processing module is further configured to perform CRC check on the encoded first information according to a first cyclic redundancy check code CRC to obtain the first information, and perform CRC check on the encoded second information according to a second CRC to obtain the second information, where the number of bits of the first CRC is different from the number of bits of the second CRC.
The communication apparatus according to any one of claims 37 to 44, wherein the second information is represented by a sequence.
The communication apparatus according to any of claims 37-46, wherein the synchronization signal comprises a secondary synchronization signal SSS, wherein a ratio between energy per resource element EPRE of the second PBCH and EPRE of the SSS is X db, X being greater than or equal to 0.
The communications apparatus of any one of claims 37-47, wherein the second PBCH occupies less bandwidth than the first PBCH.
A communication device, the communication device comprising: a processor and interface circuit;

The interface circuit is used for receiving a computer program or instructions and transmitting the computer program or instructions to the processor;

the processor is configured to execute the computer program or instructions to cause the communication device to perform the method of any one of claims 1-12 or to cause the communication device to perform the method of any one of claims 13-24.
A computer readable storage medium comprising a computer program or instructions which, when run on a communication device, causes the communication device to perform the method of any one of claims 1-11 or causes the communication device to perform the method of any one of claims 13-24.