CN116406498A - A communication method and device - Google Patents

Abstract

The present application discloses a communication method and device. The method includes: determining a first signal; wherein, the first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH; the PSS, the SSS The PBCH and the PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS, or the SSS and the PSS are separated by at least 2 symbols in the time domain; and the first signal is sent.

Description

A communication method and device technical field

The present application relates to the technical field of wireless communication, and in particular to a communication method and device.

Background technique

In the existing fifth generation mobile communication technology (the 5th generation, 5G) new radio (new radio, NR) system, the terminal device can realize the synchronization signal and PBCH block (SSB) by receiving the synchronization signal and PBCH block Synchronization of base stations, and acquisition of system information, etc. Wherein, 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) together constitute an SSB. As shown in Figure 1, in the time domain, 1 SSB occupies 4 orthogonal frequency division multiplexing (OFDM) symbols (symbols), which are symbols 0 to 3, and in the frequency domain, 1 The SSB occupies 20 resource blocks (resource block, RB), that is, 240 subcarriers, and within the 20 RBs, subcarriers are numbered from 0 to 239. The PSS is located on the 127 subcarriers corresponding to symbol 0, and the SSS is located on the 127 subcarriers corresponding to symbol 2.

A current SSB occupies 20 RBs in the frequency domain, and the bandwidth occupied by the SSB is too large to be compatible with the SSB access of the narrowband terminal equipment.

Contents of the invention

The present application provides a communication method and device to solve the problem in the prior art that SSB is not applicable to narrowband terminal equipment.

In a first aspect, the present application provides a communication method, which can be executed by a first communication device, for example, the first communication device is a network device. The first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip. The method includes: determining a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS and the PSS Adjacent, or, the SSS and the PSS are separated by at least 2 symbols in the time domain; sending the first signal.

Through the above method, in the first signal determined by the network device, the SSS is adjacent to the PSS, or the interval between the SSS and the PSS is at least 2 symbols in the time domain, so that the narrowband terminal device can be based on the first The relative positions of the SSS and the PSS in the signal determine that the first signal is the SSB signal corresponding to the narrowband terminal device. Misaccess of the broadband terminal device and the non-narrowband terminal device in other NR systems caused by the detection of the SSS of the first signal by other non-narrowband terminal devices in NR is avoided.

In a possible implementation manner, the first signal includes 6 symbols in the time domain.

Through the above method, it can be ensured that the PBCH in the SSB corresponding to the narrowband terminal device in the embodiment of the present application occupies enough symbols in the time domain, so as to ensure that the narrowband terminal device in NR and the NR terminal device achieve the same coverage.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the second symbol in the time domain, and the PBCH is located in the third to sixth symbols in the time domain.

Through this method, the configuration of the PBCH can be relatively uniform, so that the overall peak-to-average ratio of the SSB signal can be set to be more balanced. It can reduce the requirement for terminal equipment to detect SSB, and improve the applicability of SSB.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fourth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fifth symbol and the sixth symbol.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fifth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fourth symbol, and the sixth symbol.

Through the above method, the design flexibility of the narrowband SSB can be improved, so as to be applicable to more application scenarios of the narrowband terminal equipment.

In a possible implementation manner, the sequence of the PSS is generated according to the first sequence; the first sequence includes a first shift value and a second shift value; wherein the first shift value is less than A positive integer of 43; the second shift value is determined according to the number of the PSS, and the number of the PSS is used to determine a cell identity.

The PSS signal in the SSB in the NR is distinguished by additionally adding the first shift value to the PSS sequence. Therefore, when the NR terminal device blindly detects the PSS, it cannot blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of NR non-narrowband terminal devices and reducing the power consumption of NR non-narrowband terminal devices .

A possible implementation manner, the sequence d _k (n) of the PSS satisfies:

d _k (n) = 1-2x (m)

的取值范围为{0,1,2}，所述

表示PSS的编号；所述第二移位值是根据所述

确定。 Wherein, x(m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K represents the first shift value;

The value range of is {0,1,2}, the

Indicates the number of the PSS; the second shift value is based on the

Sure.

A possible implementation manner, the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the main PSS and the SSS; or, the frequency domain position occupied by the PBCH includes the PSS and the SSS occupied frequency domain location.

Through the above method, compared with the PBCH in the prior art, the frequency domain bandwidth occupied by the PBCH of the first signal is reduced, which can better adapt to scenarios of narrowband terminal equipment and narrowband Internet of Things.

In a possible implementation manner, the number of subcarriers occupied by the PBCH in the frequency domain is at least one of the following: 144, 72, or 121.

In a second aspect, the present application provides a communication method, which can be executed by a second communication device. The second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, for example, a narrowband terminal device or a chip. Exemplarily, when the communication method is applied to a vehicle, the first communication device may be a vehicle-mounted device, or a chip set in the vehicle-mounted device to realize the functions of the vehicle-mounted device, or a chip used to realize the functions of the vehicle-mounted device Other parts of the function. It may also be a narrowband terminal device, or a chip provided in the narrowband terminal device for realizing the functions of the narrowband terminal device, or be other components for realizing the functions of the narrowband terminal device.

The method includes: receiving a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS and the PSS adjacent in the time domain, or the SSS and the PSS are separated by at least 2 symbols in the time domain; perform time-frequency synchronization and/or acquire system information according to the received first signal.

Through the above method, the narrowband terminal device can determine the first signal based on the fact that the SSS in the first signal is adjacent to the PSS in the time domain, or that the SSS and the PSS are separated by at least 2 symbols in the time domain. The signal is an SSB signal corresponding to the narrowband terminal device, and further, the first signal is used to perform time-frequency synchronization and/or acquire system information. Avoiding wrong access of broadband terminal equipment and non-narrowband terminal equipment in other NR systems caused by other non-narrowband terminal equipment in NR detecting the SSS of the first signal.

In a possible implementation manner, the first signal includes 6 symbols in the time domain.

Through the above method, it can be ensured that the PBCH in the SSB corresponding to the narrowband terminal device in the embodiment of the present application occupies enough time units, so as to ensure that the narrowband terminal device in NR and the NR terminal device achieve the same coverage.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the second symbol in the time domain, and the PBCH is located in the third to sixth symbols in the time domain.

Through this method, the configuration of the PBCH can be relatively uniform, so that the overall peak-to-average ratio of the SSB signal can be set to be more balanced. It can reduce the requirement for terminal equipment to detect SSB, and improve the applicability of SSB.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fourth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fifth symbol and the sixth symbol.

Through the above method, the first signal occupies more OFDM symbols in the time domain, and through the expansion in the time domain, it is ensured that the narrowband terminal equipment in NR and the NR terminal equipment achieve the same coverage, and the NR terminal equipment is prevented from being on the first signal. Wrong access can reduce the false detection of SSS by NR non-narrowband terminal equipment, thereby reducing the power consumption of non-narrowband terminal equipment.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fifth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fourth symbol, and the sixth symbol.

Through the above method, the design flexibility of the narrowband SSB can be improved, so as to be applicable to more application scenarios of the narrowband terminal equipment.

In a possible implementation manner, the sequence of the PSS is generated according to the first sequence; the first sequence includes a first shift value and a second shift value; wherein the first shift value is less than A positive integer of 43; the second shift value is determined according to the number of the PSS, and the number of the PSS is used to determine a cell identity.

By adding an additional shift value to the PSS sequence, the PSS signal in the SSB in the NR is distinguished. Therefore, when the NR terminal device blindly detects the PSS, it cannot blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of NR non-narrowband terminal devices and reducing the power consumption of NR non-narrowband terminal devices .

A possible implementation manner, the sequence d _k (n) of the PSS satisfies:

d _k (n) = 1-2x (m)

的取值范围为{0,1,2}，所述

表示PSS的编号；所述第二移位值为根据所述

确定的。 Wherein, the x(m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K is the first shift value; the

The value range of is {0,1,2}, the

Indicates the number of the PSS; the second shift value is based on the

definite.

A possible implementation manner, the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS and the SSS; or, the frequency domain position occupied by the PBCH includes the frequency domain position occupied by the PSS and the SSS frequency domain location.

Through the above method, compared with the PBCH in the prior art, the frequency domain bandwidth occupied by the PBCH of the first signal is reduced, which can better adapt to scenarios of narrowband terminal equipment and narrowband Internet of Things.

In a possible implementation manner, the number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.

In a third aspect, the present application provides a communication device, for example, the communication device is the aforementioned first communication device. The first communication device is configured to execute the method in the foregoing first aspect or any possible implementation manner. Specifically, the first communication device may include a module for executing the method in the first aspect or any possible implementation manner, for example, including a processing module and a transceiver module.

Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can realize different functions (the sending module is used to realize the function, the receiving module is used to realize the function of receiving signals). Exemplarily, the first communication device is a communication device, or is a chip or other components provided in the communication device. Exemplarily, the communication device is a network device, or may be a chip or other components set in the network device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or, the sending module can be realized by a transmitter, and the receiving module can be realized by a receiver, and the transmitter and the receiver can be different functional modules, or can be the same functional module, but can realize different functions (the transmitter is used to realize The function of sending a signal, and the receiver is used to realize the function of receiving a signal). If the first communication device is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the first communication device is a chip set in the communication device, then the transceiver (or, transmitter and receiver) is, for example, a communication interface (or in other words, an interface circuit) in the chip, and the communication interface and the communication device The radio frequency transceiver component in the radio frequency transceiver component is connected to realize information transmission and reception through the radio frequency transceiver component. During the introduction of the third aspect, continue to use the processing module and the transceiver module as examples for introduction. Taking the communication device as the first communication device as an example, wherein,

A processing module, configured to determine a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS and the The PSSs are adjacent, or the SSS and the PSS are separated by at least 2 symbols in the time domain;

A transceiver module, configured to send the first signal.

In a fourth aspect, the present application provides a communication device, for example, the communication device is the aforementioned second communication device. The second communication device is configured to execute the method in the foregoing second aspect or any possible implementation manner. Specifically, the second communications device may include modules for executing the method in the second aspect or any possible implementation manner, for example, including a processing module and a transceiver module.

Exemplarily, the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can realize different functions (the sending module is used to realize the function, the receiving module is used to realize the function of receiving signals). Exemplarily, the second communication device is a communication device, or is a chip or other components provided in the communication device. Exemplarily, the communication device is a narrowband terminal device, or may be a chip or other components set in the narrowband terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. Or, the sending module can be realized by a transmitter, and the receiving module can be realized by a receiver, and the transmitter and the receiver can be different functional modules, or can be the same functional module, but can realize different functions (the transmitter is used to realize The function of sending a signal, and the receiver is used to realize the function of receiving a signal). If the first communication device is a communication device, the transceiver is implemented by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the first communication device is a chip set in the communication device, then the transceiver (or, transmitter and receiver) is, for example, a communication interface (or in other words, an interface circuit) in the chip, and the communication interface and the communication device The radio frequency transceiver component in the radio frequency transceiver component is connected to realize information transmission and reception through the radio frequency transceiver component. During the introduction of the fourth aspect, continue to use the processing module and the transceiver module as examples for introduction. Taking the communication device as the second communication device as an example, wherein,

A transceiver module, configured to receive a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS and the The PSSs are adjacent in the time domain, or the SSS and the PSS are separated by at least 2 symbols in the time domain;

A processing module, configured to perform time-frequency synchronization and/or acquire system information according to the received first signal.

In a fifth aspect, a communication device is provided, for example, the first communication device as described above. The communication device includes a processor and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other, and are used to implement the method described in the foregoing first aspect or various possible implementation manners. Alternatively, the first communication device may not include a memory, and the memory may be located outside the first communication device. The processor, the memory, and the communication interface are coupled to each other, and are used to implement the method described in the foregoing first aspect or various possible implementation manners. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the method in the above first aspect or any possible implementation manner. Exemplarily, the first communication device is a communication device, or is a chip or other components provided in the communication device. Exemplarily, the communication device is a network device. For example, the first communication device may be an access network device, or may be a chip or other components provided in the access network device.

Wherein, if the first communication device is a communication device, the communication interface is implemented, for example, through a transceiver (or, a transmitter and a receiver) in the communication device, for example, the transceiver is implemented through an antenna, a feeder and a Implementation of codecs, etc. Alternatively, if the first communication device is a chip set in the communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device, so as to The sending and receiving of information is realized through the radio frequency sending and receiving component.

In a sixth aspect, a communication device is provided, for example, the second communication device as described above. The communication device includes a processor and a communication interface (or interface circuit), and the communication interface can be used to communicate with other devices or equipment. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other, and are used to implement the method described in the above second aspect or various possible implementation manners. Alternatively, the second communication device may not include a memory, and the memory may be located outside the second communication device. The processor, the memory, and the communication interface are coupled to each other, and are used to implement the method described in the above second aspect or various possible implementation manners. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to execute the method in the above second aspect or any possible implementation manner. Exemplarily, the second communication device is a communication device, or is a chip or other components provided in the communication device. Exemplarily, the communication device is a narrowband terminal device, or a vehicle-mounted device. For example, the second communication device may be a narrowband terminal device, or may be a chip or other components provided in the narrowband terminal device.

Wherein, if the second communication device is a communication device, the communication interface is implemented, for example, by a transceiver (or, a transmitter and a receiver) in the communication device, for example, the transceiver is implemented by an antenna, a feeder and a receiver in the communication device. Implementation of codecs, etc. Alternatively, if the second communication device is a chip set in the communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to The sending and receiving of information is realized through the radio frequency sending and receiving component.

In a seventh aspect, there is provided a chip, the chip includes a processor and a communication interface, the processor is coupled to the communication interface, and is used to implement the method provided in the above first aspect or any optional implementation manner .

Optionally, the chip may further include a memory, for example, the processor may read and execute a software program stored in the memory, so as to realize the above-mentioned first aspect or any optional implementation mode provided method. Alternatively, the memory may not be included in the chip, but located outside the chip, that is, the processor may read and execute the software program stored in the external memory, so as to realize the above-mentioned first aspect or The method provided by any optional embodiment.

In an eighth aspect, there is provided a chip, the chip includes a processor and a communication interface, the processor is coupled to the communication interface, and is used to implement the method provided in the above second aspect or any optional implementation manner .

Optionally, the chip may further include a memory, for example, the processor may read and execute a software program stored in the memory, so as to realize the above-mentioned second aspect or any optional implementation mode provided method. Alternatively, the memory may not be included in the chip, but located outside the chip, that is, the processor may read and execute the software program stored in the external memory, so as to realize the above-mentioned second aspect or The method provided by any optional embodiment.

A ninth aspect provides a communication system, the communication system includes the communication device described in the third aspect, the communication device described in the fifth aspect, or the communication device described in the seventh aspect, and includes the communication device described in the fourth aspect device, the communication device according to the sixth aspect, or the communication device according to the eighth aspect.

In a tenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or any one of the above-mentioned The methods described in the possible implementations.

In an eleventh aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used for storing a computer program, and when the computer program is run on a computer, the computer is made to perform the above-mentioned second aspect or any one of the following. method described in a possible implementation.

In a twelfth aspect, there is provided a computer program product containing instructions, the computer program product is used to store a computer program, and when the computer program is run on a computer, it causes the computer to execute any one of the above first aspect or method described in a possible implementation.

In a thirteenth aspect, there is provided a computer program product containing instructions, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes any one of the above-mentioned second aspect or method described in a possible implementation.

Description of drawings

Fig. 1 is a schematic diagram of SSB design in the prior art;

FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a communication method flow provided by an embodiment of the present application;

5 to 7 are schematic diagrams of the SSB design provided by the embodiment of the present application;

FIG. 8 is a schematic diagram of a structure of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of a structure of a communication device provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a structure of a communication device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of a structure of a communication device provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (long term evolution, LTE) system, worldwide interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, future fifth generation (5th Generation, 5G) systems, such as a new generation of wireless access technology (new radio access technology, NR), and future communication systems, such as 6G systems.

The technical solutions of the embodiments of the present application can be applied to unmanned driving, assisted driving (driver assistance, ADAS), intelligent driving, connected driving, intelligent network driving ), car sharing, smart/intelligent car, digital car, unmanned car/driverless car/pilotless car/automobile, Internet of vehicles (IoV) , self-driving car (autonomous car), vehicle-road coordination (cooperative vehicle infrastructure, CVIS), intelligent transportation (intelligent transport system, ITS), vehicle communication (vehicular communication) and other technical fields.

In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.

1) Terminal equipment, including equipment that provides voice and/or data connectivity to users, for example, may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device may communicate with the core network via a radio access network (radio access network, RAN), and exchange voice and/or data with the RAN. The terminal device may include user equipment (user equipment, UE), wireless terminal device, mobile terminal device, device-to-device communication (device-to-device, D2D) terminal device, V2X terminal device, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, internet of things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station , remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device) and so on. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer built-in mobile devices, and the like. For example, personal communication service (personal communication service, PCS) telephone, cordless telephone, session initiation protocol (session initiation protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), and other equipment. Also includes constrained devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities, etc. For example, it includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing devices.

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes wait. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal devices. The vehicle-mounted terminal device is also called an on-board unit (OBU). ).

In this embodiment of the present application, the terminal device may further include a relay (relay). Or it can be understood that all devices capable of performing data communication with the base station can be regarded as terminal devices.

The embodiment of the present application may involve two types of terminal equipment: broadband terminal equipment and narrowband terminal equipment. Among them, the conditions to be met by broadband terminal equipment and narrowband terminal equipment include but are not limited to the following:

(1) In the embodiment of this application, the maximum bandwidth capability of the narrowband terminal device is less than or equal to the minimum bandwidth capability of the broadband terminal device. For example, the narrowband terminal device is a narrowband internet of things (narrow band internet of things, NB-IoT) terminal device, and the broadband terminal device is a long term evolution (long term evolution, LTE) terminal device. The data transmission bandwidth of NB-IoT terminal equipment is 1 RB, that is, 180kHz or 200kHz (including the guard band), because the frequency resource occupied by the PSS/SSS under the LTE system is 6 RB, that is, 1.08MHz or 1.44MHz (including guard band), so the minimum bandwidth capability of broadband terminal equipment can be considered not less than 1.08MHz. In this case, it can be considered that the maximum bandwidth capability of narrowband terminal equipment is less than or equal to the minimum bandwidth capability of broadband terminal equipment. For another example, the narrowband terminal equipment is NB-IoT terminal equipment, and the broadband terminal equipment is NR terminal equipment. Based on the design of NR system SSB, the minimum bandwidth capability of NR terminal equipment can be considered as 20 RBs, and each RB includes 12 subcarriers. , in the NR system, the subcarrier spacing is related to the frequency band deployed by the NR system, not a fixed value. Taking the minimum subcarrier spacing of 15kHz as an example, the minimum bandwidth capability can be considered to be greater than or equal to 20*12*15=3.6MHz, still It can be considered that the maximum bandwidth capability of the narrowband terminal equipment is less than or equal to the minimum bandwidth capability of the broadband terminal equipment.

(2) In the embodiment of the present application, it may also be considered that the minimum bandwidth capability of the narrowband terminal device is smaller than the minimum bandwidth capability of the broadband terminal device. If a data transmission channel is established between the terminal device and the network device, generally speaking, the terminal device needs to receive the synchronization channel and broadcast channel sent by the network device first, so it can be considered that the bandwidth corresponding to the synchronization channel and broadcast channel sent by the network device is The minimum bandwidth capability required by terminal equipment.

Based on (1) and (2), the narrowband terminal device can also be considered as a bandwidth limited (bandwidth limited, BL) terminal device. It should be noted that the BL terminal device can also have other bandwidths than (1) and (2). characteristics, not specifically limited.

(3) In this embodiment of the application, narrowband terminal devices can also be considered to maintain normal data communication with network devices through coverage enhancement (CE) technology, while broadband terminal devices can communicate with network devices even if they do not use CE technology. The device maintains normal data communication. CE technologies include but are not limited to technologies such as repeated data transmission or power boosting. Or, if both the broadband terminal device and the narrowband terminal device need to maintain normal data communication with the network device through repeated data transmission in certain scenarios, then the maximum number of repetitions required for the narrowband terminal device to maintain data communication with the network device , to be less than the maximum number of repetitions required for the broadband terminal device to maintain data communication with the network device.

(4) In this embodiment of the application, the narrowband terminal device can also be considered as a low power wide coverage access (LPWA) terminal device, and the broadband terminal device can be considered as an enhanced mobile broadband (enhanced mobile broadband, eMBB) terminal equipment or ultra-reliable low-latency communication (ultra-reliability low-latency communication, URLLC) terminal equipment.

In addition, in this embodiment of the application, the same terminal device can have both narrowband capability and broadband capability, that is, the terminal device can function as both a broadband terminal device and a narrowband terminal device, or in other words, the terminal device has both non- CE and CE capabilities, the terminal equipment can maintain normal communication with access network equipment without relying on CE technology, or can maintain normal communication with access network equipment relying on CE technology. Or, a terminal device may only have narrowband capability but not broadband capability, then the terminal device is only a narrowband terminal device rather than a broadband terminal device, that is, the terminal device can only rely on CE technology to maintain normal communication with access network devices. The technical solutions provided in the embodiments of the present application can be applied to both types of terminal devices.

2) Network equipment, for example including access network (access network, AN) equipment, such as base stations (for example, access points), may refer to equipment in the access network that communicates with wireless terminal equipment through one or more cells over the air interface , or for example, a network device in a V2X technology is a road side unit (road side unit, RSU). The base station can be used to convert received over-the-air frames to and from Internet Protocol (IP) packets and act as a router between the terminal device and the rest of the access network, which can include an IP network. The RSU can be a fixed infrastructure entity supporting V2X applications, and can exchange messages with other entities supporting V2X applications. The network device can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also include a 5G NR system The next generation node B (next generation node B, gNB) may also include the centralized unit (centralized unit, CU) and the distributed unit (distributed unit, DU), the embodiment of the present application is not limited.

3) In the embodiment of the present application, the mentioned cell may be a cell corresponding to a base station, and the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (small cell). The small cells here may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells), etc. These small cells have the characteristics of small coverage and low transmission power , suitable for providing high-speed data transmission services.

Multiple cells can work on the same frequency at the same time on the carrier in the LTE system or NR system. In some special scenarios, the concept of the carrier and the cell can be considered to be equivalent. For example, in a carrier aggregation (carrier aggregation, CA) scenario, when a secondary carrier is configured for a terminal device, the carrier index of the secondary carrier and the cell identity (cell identify, Cell ID) of the secondary cell working on the secondary carrier will be carried at the same time, In this case, it can be considered that the concepts of a carrier and a cell are equivalent, for example, accessing a carrier by a terminal device is equivalent to accessing a cell. Similar descriptions are also provided for a dual connectivity (DC) scenario. In this embodiment of the application, the concept of a cell will be used for introduction. In the NR system, if there is only one active bandwidth part (bandwidth part, BWP) on a cell or a carrier, it can also be considered that the concepts of the cell and the BWP are equivalent.

4) Air interface resources. In the cell, the base station and the UE can perform data transmission through air interface (user to Network interface UE, Uu) resources. The air interface resources may include time-domain resources and frequency-domain resources, and the time-domain resources and frequency-domain resources may also be referred to as time-frequency resources. The frequency domain resource may be located in a set frequency range, the frequency range may also be called a frequency band (band) or a frequency band, and the width of the frequency domain resource may be called a bandwidth (bandwidth, BW).

5) Time-frequency resources, the time-frequency resources may be resource grids, including time domain and frequency domain. For example, the time domain unit may be a symbol, and the frequency domain unit may be a subcarrier. The smallest resource unit in a resource grid may be called a resource element (RE). A resource block (resource block, RB) may include one or more subcarriers in the frequency domain, for example, 12 subcarriers. A slot can include one or more symbols in the time domain, for example, a slot in NR can include 14 symbols (in the case of cyclic prefix (CP)) or 12 symbols (in the case of extended cyclic prefix) . Frequency domain resources are usually in units of Orthogonal Frequency Division Multiple (OFDM) symbols, sub-slots, slots, subframes or frames . It should be noted that the terms "time-frequency resource" and "resource" in the embodiments of the present application may be used interchangeably.

6) Time-domain resources, including time units, which can be slots, mini-slots, symbols or other time-domain granularities (such as system frames and subframes), one of which A slot may include at least one symbol, eg 14 symbols, or 12 symbols.

In 5G NR, a slot can be composed of at least one of symbols used for downlink transmission, symbols used for flexible, and symbols used for uplink transmission, etc., and the composition of such a slot is called a different slot format (slot format, SF), there may be up to 256 slot formats.

The time slot can have different slot types, and the number of symbols included in different slot types is different. For example, a mini slot (mini slot) contains less than 7 symbols, 2 symbols, 3 symbols, 4 symbols, etc., A common slot (slot) contains 7 symbols or 14 symbols, etc. Depending on the subcarrier spacing, each symbol length can be different, so the slot length can be different.

7) Frequency domain resources. Since the bandwidth of a 5G NR single carrier can reach 400MHz, a bandwidth part (BWP) is defined within a carrier, which can also be called a carrier bandwidth part. The BWP includes several consecutive resource units in the frequency domain, such as resource blocks (resource block, RB). The bandwidth part may be a downlink or uplink bandwidth part, and the terminal device receives or sends data on a data channel within the activated bandwidth part. Frequency domain resources may include subchannels, frequency bands (bands), carriers (carriers), bandwidth parts (bandwidth parts, BWPs), resource blocks (resource blocks, RBs), resource elements (Resource Elements, REs), resource pools, and the like. Wherein, the RB occupies one subframe or one time slot in the time domain, and occupies multiple consecutive subcarriers in the frequency domain. In LTE, PRBs occupy 14 consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols in a subframe in the time domain, and occupy 12 consecutive subcarriers in the frequency domain. A subchannel is the smallest unit of frequency domain resources occupied by the physical sidelink shared channel, and one subchannel may include one or more resource blocks (resource blocks, RBs). The bandwidth of the wireless communication system in the frequency domain may include multiple RBs. For example, in each possible bandwidth of the LTE system, the included PRBs may be 6, 15, 25, 50, and so on.

8) Sequence resources, also known as code domain resources, are related parameters used to indicate sequences. For a random sequence, the parameters of the sequence include the initial position of the sequence, the length of the sequence, and the initial value of the sequence; code, cyclic shift (cyclic shift, CS) or orthogonal cover code (orthogonal cover code, OCC), etc.

The initial value of the sequence refers to the initial value of the shift register that generates the sequence for a random sequence (eg Gold sequence, m sequence).

The initial position of the sequence and the random sequence used for transmission satisfy: c(n)=c(n+a), n=0,1,2,...,L-1, where c(n) is used The random sequence used in transmission, a is the initial position of the random sequence, L is the length of the random sequence, generally a is a non-negative integer, such as a is 0, or a is 2, etc.

For example, a sequence of synchronization signals can be generated as follows:

r _l (n)=(1-2c(n))

Where n=0,1,2,...; r _l () represents a sequence of synchronous signals; c(n) is a random sequence, for example, the random sequence is a 31-bit or Gold sequence of a 31-bit shift register, or an m-sequence.

9) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

And, unless otherwise stated, the ordinal numerals such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or priority of multiple objects. Importance. For example, the first synchronization signal and the second synchronization signal are only used to distinguish different synchronization signals, and do not represent the differences in content, priority, sending order, or importance of the two synchronization signals.

Some concepts involved in the embodiments of the present application are introduced above, and the technical features of the embodiments of the present application are introduced below.

5G NR is a global 5G standard based on a new OFDM air interface design, and it is also a very important foundation for the next generation of cellular mobile technology. The services of 5G technology are very diverse, and can be oriented to eMBB, URLLC, and massive machine-type communication (mMTC).

The diversification of NR system services enables the design of the NR system to meet the access requirements of terminal devices with different bandwidth capabilities. For example, eMBB terminal devices can access the NR system by obtaining broadband information of the NR system, while some mMTC terminal devices can access the NR system by obtaining narrowband information of the NR system due to design cost or low power consumption considerations; For another example, even for the same service type, such as mMTC, there are different service rate requirements. For example, for use cases such as meter reading, tracking and tracing, or on-demand payment, terminal devices do not require high data transmission rates, but generally require deep coverage. , generally can be accessed through narrowband; on the other hand, such as surveillance video backhaul, etc., require relatively high data transmission rate, so it can be regarded as a terminal device with medium and high-end capabilities, and generally can be accessed through broadband.

On the other hand, with the diversification of NR system services, the capabilities of terminal equipment under the NR system are also diversified, and can work under different system bandwidths.

In the existing NR system, the terminal device can realize synchronization with the base station and obtain system information and the like by receiving the SSB. Wherein, PSS, SSS and PBCH together constitute an SSB. As shown in Figure 1, in the time domain, 1 SSB occupies 4 OFDM symbols, which are symbols 0 to 3. In the frequency domain, 1 SSB occupies 20 RBs, that is, 240 subcarriers. Within an RB, the subcarriers are numbered from 0 to 239. The PSS is located on the middle 127 subcarriers of symbol 0, and the SSS is located on the middle 127 subcarriers of symbol 2. The PSS and SSS signals occupy one symbol in the time domain, and 12 RBs in the frequency domain, including 128 subcarriers. Specifically as shown in Figure 1 below, where the first OFDM symbol from the left carries PSS, the subcarriers numbered 0, 1, ..., 55, 183, 184, ..., 239 are set to 0, and the numbers are 56, 57, ... , 182 subcarriers are subcarriers occupied by PSS; the 2nd and 4th OFDM symbols from the left carry PBCH, and every 4 consecutive subcarriers have a DMRS corresponding to PBCH; the 3rd OFDM symbol from the left Carrying SSS and PBCH, subcarriers numbered 56, 57, ..., 182 are set to SSS, and subcarriers numbered 0, 1, ..., 47, 192, 193, ..., 239 are set to PBCH. In order to protect the PSS and SSS, the energy of different guard subcarriers is set to 0, that is, the guard subcarriers are not used to carry signals, and 8 subcarriers and 9 subcarriers are reserved on both sides of the SSS as guard bands. Carriers, such as the blank areas on the upper and lower sides of the SSS in Figure 1 are guard subcarriers. PBCH occupies all subcarriers of symbol 1 and symbol 3, and occupies all subcarriers of symbol 2 except for the subcarriers occupied by SSS. other subcarriers).

Future terminal devices will have multiple bandwidth capabilities, such as narrowband capabilities and broadband capabilities, and will also face more diverse application and business scenarios. Considering the bandwidth limitation of narrowband IoT terminals, the bandwidth occupied by the PBCH signal in the SSB of the NR system is too large for narrowband connected IoT devices. As a result, the SSB in the NR system does not meet the requirements of IoT device access and cannot be compatible with narrowband IoT devices. If the SSB is connected to the NR system, it is impossible to detect the current SSB for the narrowband terminal equipment with a bandwidth of less than 20RB. Considering that the narrowband SSB is used as a common signal, the base station needs to transmit the SSB frequently (always). Therefore, it is necessary to minimize the impact on the energy saving mechanism caused by the transmission of the SSB by the existing base station. In view of this, the technical solutions of the embodiments of the present application are provided. The embodiment of the present application provides a new SSB, which means that these signals can occupy multiple symbols in the time domain for transmission, and the embodiment of the present application restricts the frequency domain range of the SSB to be the same as that of the PSS and SSS, and the The PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS and the PSS are adjacent in the time domain, or the SSS and the PSS are separated by at least 2 symbols in the time domain ; The SSB provided by the embodiment of the present application can not only meet the requirements of the coverage performance of the SSB of the narrowband terminal equipment, but also avoid misdetection of the SSB of the narrowband terminal equipment by other terminal equipment in the NR system, and improve the SSB for the narrowband terminal equipment. While improving the performance, the pertinence of SSB is improved.

The technical solutions provided by the embodiments of the present application can be used in wireless communication systems, including 4.5G or 5G wireless communication systems, further evolution systems based on LTE or NR, and future wireless communication systems.

The first application scenario of the embodiment of the present application may be a wireless communication system capable of simultaneously serving terminal devices with different bandwidth capabilities. For example, an LTE system or an NR system that can simultaneously serve mMTC terminal devices and eMBB terminal devices.

Please refer to FIG. 2 , which is an exemplary architecture diagram of a communication system 100 according to an embodiment of the present application. The method in the embodiment of the present application may be applied to the communication system 100 shown in FIG. 2 . The communication system 100 may be a PLMN network, a device-to-device (device-to-device, D2D) network, a machine-to-machine (machine-to-machine, M2M) network, an IoT network or other networks. In addition, the terminal device 104 to the terminal device 106 may also form a communication system. The network architecture shown in FIG. 2 is applicable to the first application scenario of the embodiment of the present application.

In the communication system 100 shown in FIG. 2 , a network device and terminal devices 101 - 106 form a communication system 100 . In the communication system 100, the network device can send downlink data to the terminal device 101-106, and of course, the terminal device 101-106 can also send uplink data to the network device. In the communication system, the terminal device 105 can send downlink data to the terminal device 104 or the terminal device 106 .

The network device or terminal device in FIG. 2 may be hardware, or functionally divided software, or a combination of the above two. The network devices or terminal devices in FIG. 2 may communicate through other devices or network elements.

The terminal equipment in Figure 2 may include two types of terminal equipment, namely the first type of terminal equipment and the second type of terminal equipment 2, both of which can be connected to network equipment, supported by the first type of terminal equipment Take broadband-capable terminal equipment as an example. For example, the first type of terminal equipment can be an existing version 15 NR terminal equipment. Take the second type of terminal equipment as an example that supports narrowband capabilities, such as a future version of narrowband mMTC terminal. equipment.

It should be understood that, of course, the number of terminal devices in FIG. 2 is only an example, and the communication system 100 to which the method of the embodiment of the present application can be applied may include more or fewer network devices or terminal devices. In practical applications, a network device can provide services for multiple terminal devices.

The second application scenario of the embodiment of the present application may be a wireless communication system that can only serve terminal devices with narrowband capabilities, for example, an LTE system or an NR system that only serves NB-IoT terminal devices.

Please refer to FIG. 2 , which is another network architecture applied in the embodiment of the present application, and the network architecture shown in FIG. 3 is applicable to the second application scenario of the embodiment of the present application.

FIG. 3 includes a network device and a terminal device. The terminal device can be connected to the network device. For example, the terminal device is a terminal device supporting narrowband capabilities, such as an NB-IoT terminal device. Of course, the number of terminal devices in FIG. 3 is just an example. In practical applications, a network device may provide services for multiple terminal devices.

The network device in FIG. 2 or FIG. 3 is, for example, an access network device, such as a base station. Wherein, the network equipment corresponds to different equipment in different systems, for example, in the fourth generation mobile communication technology (the 4 ^th generation, 4G) system, it can correspond to eNB, and in the 5G system, it can correspond to network equipment in 5G, such as gNB.

Next, the technical solutions provided by the embodiments of the present application will be introduced with reference to the accompanying drawings.

An embodiment of the present application provides a communication method. Please refer to FIG. 4 , which is a flowchart of the method. In the following introduction process, it is taken as an example that this method is applied to the network architecture shown in FIG. 2 or FIG. 3 . In addition, the method may be performed by two communication devices, such as a first communication device and a second communication device. Wherein, the first communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method , of course, can also be other communication devices, such as a system on a chip. The second communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or the second communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, of course It may also be other communication devices, such as a system on a chip. And there are no restrictions on the implementation of the first communication device and the second communication device, for example, the first communication device may be a network device, the second communication device may be a terminal device, or the first communication device may be a network device, and the second communication device It is a communication device that can support the functions required by the terminal device to implement the method, or the first communication device is a communication device that can support the functions required by the network device to implement the method, and the second communication device is a communication device that can support the terminal device to implement the method. communication device for the desired function, etc. Wherein, the network device is, for example, a base station.

For ease of introduction, in the following, it is taken that the method is executed by a network device and a terminal device as an example, that is, it is taken that the first communication device is a network device and the second communication device is a terminal device as an example. If this embodiment is applied to the network architecture shown in Figure 3, the network equipment described below may be the network equipment in the network architecture shown in Figure 3, and the terminal equipment described below may be the network equipment shown in Figure 3 The terminal device 1 or terminal device 2 in the network architecture, if this embodiment is applied to the network architecture shown in Figure 4, the network equipment described below may be the network equipment in the network architecture shown in Figure 4, The terminal devices described below may be terminal devices in the network architecture shown in FIG. 4 . It should be noted that the embodiment of the present application only takes execution through network devices and terminal devices as an example, and is not limited to this scenario. For example, it may also be executed through terminal devices and terminal devices. If this is the case, the following The network device can be replaced by the first terminal device, and the terminal device hereinafter can be replaced by the second terminal device. The first terminal device can be a terminal device that supports both broadband capability and narrowband capability, or a terminal device that supports narrowband capability , the second terminal device may be a terminal device supporting both broadband capability and narrowband capability, or a terminal device supporting narrowband capability.

S401. The network device determines a first signal.

In this embodiment of the present application, the first signal includes an SSB. The SSB may include PSS, SSS and PBCH. It should be noted that the PSS and the SSS may be called the first SS and the second SS respectively, and the names are not limited in this embodiment of the present invention.

Wherein, the PSS, the SSS and the PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS in the time domain, or the SSS and the PSS are spaced apart in the time domain At least 2 symbols.

In order to prevent the SSB used for narrowband terminal equipment from being blindly detected by broadband terminal equipment or other terminal equipment in NR, for example, the scheme of setting SSS on the 3rd symbol, whether it is broadband terminal equipment or other NR system All terminal devices can receive the PSS and SSS, resulting in unnecessary blind detection of broadband terminal devices and non-narrowband terminal devices in other NR systems, wasting resources of the terminal devices. The present application proposes the following possible implementation methods to prevent the SSB corresponding to the narrowband terminal device from being blindly detected by the non-narrowband terminal device, so as to reduce the power consumption of the terminal device.

In a possible implementation manner, the different symbols in the time domain where each SSB in the SSB is located can be configured by the network device, or specified by a protocol and stored in the network device and the terminal device, specifically No restrictions.

In a possible implementation manner, the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS and the SSS; or, the frequency domain position occupied by the PBCH includes the frequency domain position occupied by the PSS or the SSS. As shown in FIG. 5 , the number of subcarriers occupied by the first signal may be 144 subcarriers, 72 subcarriers or 121 subcarriers, which is not limited here.

When the frequency domain position occupied by the PBCH is set to be the same as the frequency domain position occupied by the PSS and SSS, compared with the setting method of the PBCH in the SSB with wide frequency domain bandwidth in the prior art, the frequency domain bandwidth of the SSB is reduced . Therefore, in order to ensure the coverage of narrowband terminal equipment, in the embodiment of this application, the performance loss caused by bandwidth reduction can be compensated for through time domain expansion. A possible implementation method can set the SSB symbols to 6 symbols , for example, as shown in FIG. 5, one SSB includes 0-5 symbols. 1 symbol is used for PSS, 1 symbol is used for SSS, and 4 symbols are used for PBCH.

Through the above method, it can be ensured that the PBCH in the SSB corresponding to the narrowband terminal device in the embodiment of the present application occupies enough time units, so as to ensure that the narrowband terminal device in NR and the NR terminal device achieve the same coverage.

In the embodiment of the present application, the number of subcarriers occupied by the first signal may be 144 subcarriers, 72 subcarriers or 121 subcarriers, which is not limited here. For a communication system in which one resource block RB includes 12 subcarriers, the 144 subcarriers may also be referred to as 12 resource blocks RB. The PSS, SSS and PBCH of each OFDM symbol occupy 12 RBs, and the PSS, SSS and PBCH signals in the frequency domain all occupy 144 subcarriers. The first signal can occupy 6 symbols, and the symbols are described in order from small to large. The 6 symbols can be the first symbol, the second symbol, the third symbol, the fourth symbol, and the fifth symbol. symbol and the sixth symbol.

As an implementation manner of SSB, for example, refer to FIG. 5 , which is a schematic diagram of SSB. The SSS and the PSS are separated by 2 symbols in the time domain. The symbols are described in order from small to large, that is, PSS is located in the first symbol in the time domain, SSS is located in the fourth symbol in the time domain, and PBCH is located in the second and third symbols in the time domain , the fifth symbol and the sixth symbol. For example, the 6 OFDM symbols occupied by the SSB time domain are #0-#5. The #0 symbol is the PSS signal, the #3 symbol is the SSS signal, and the #1#2#4#5 symbol is the PBCH signal.

It can be understood that, in this embodiment of the present application, X1 is located at the X2th symbol in the time domain, which may also be referred to as X1 being carried to the X2th symbol. For example, X1 may take PSS, SSS, or PBCH. X2 can take the first symbol, the second symbol, the third symbol and the fourth symbol and so on. For example, PSS located in the first symbol in the time domain can also be called PSS carried in the first symbol, SSS located in the fourth symbol in the time domain can also be called SSS carried in the fourth symbol, PBCH in the time domain Located on the second symbol may also be referred to as PBCH carried on the second symbol and so on.

Through this method, the configuration of the PBCH can be relatively uniform, so that the overall peak-to-average ratio of the SSB signal can be set to be more balanced. It can reduce the requirement for terminal equipment to detect SSB, and improve the applicability of SSB.

As an implementation manner of SSB, for example, refer to FIG. 6 , which is a schematic diagram of SSB. The symbols are described in ascending order, the PSS is located in the first symbol in the time domain, the SSS is located in the second symbol in the time domain, and the PBCH is located in the third to Sixth symbol.

As an implementation manner of SSB, for example, refer to FIG. 7 , which is a schematic diagram of SSB. The SSS is separated from the PSS by 3 symbols. The PSS is located in the first symbol in the time domain, the SSS is located in the fifth symbol in the time domain, and the PBCH is located in the second symbol, the third symbol, the fourth symbol and the first symbol in the time domain. six symbols. For example, the 6 OFDM symbols occupied by the SSB time domain are #0-#5. The #0 symbol is the PSS signal, the #4 symbol is the SSS signal, and the #1#2#3#5 symbol is the PBCH signal.

Through the above method, the narrowband SSB occupies more OFDM symbols in the time domain, and through the extension in the time domain, it can make up for the performance loss caused by the reduction of bandwidth, and ensure that the low-cost IoT terminal UE and NR UE in NR can achieve the same coverage. , compared with the prior art scheme of setting SSS on the third symbol, adopting the scheme in the embodiment of the present application can reduce false detection of SSS by non-narrowband terminal equipment, thereby reducing power consumption of non-narrowband terminal equipment.

When the terminal device performs initial access, the terminal device detects the PSS completely blindly, and the terminal device does not know the location of the PSS, and the detection is realized completely through blind detection. Considering that in the above solution, the non-narrowband terminal device can determine that the SSB is the SSB corresponding to the narrowband terminal device after the SSS cannot be detected, in order to further reduce the false detection of the non-narrowband terminal device and reduce the power consumption of the non-narrowband terminal device.

In the embodiment of the present application, a method for generating a PSS signal sequence is also provided, by adding an additional shift value to the PSS sequence to distinguish the PSS signal in the SSB in the NR. Therefore, when the NR terminal device blindly detects the PSS, it cannot blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of NR non-narrowband terminal devices and reducing the power consumption of NR non-narrowband terminal devices .

In a possible implementation manner, the sequence (first sequence) of the PSS signal may be an m-sequence, and the m-sequence is used as an example for illustration below. When the PSS signal is another sequence, reference may be made to this implementation manner, and details are not repeated here.

For example, the sequence d _k (n) of the PSS signal satisfies:

d _k (n) = 1-2x (m)

Among them, the cyclic shift sequence x(i) satisfies:

x(i+7)=(x(i+4)+x(i)) mod 2

The initial value of x(i) satisfies:

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

In the embodiment of this application, m satisfies:

0≤n<127

中的

用于表示PSS的索引号，

取值范围为{0,1,2}。终端设备可以通过不同的PSS序列和SSS序列以及PBCH中传输的索引号(index)共同确定SSB块索引(block index)，用于识别不同的SSB。 Wherein, n is a positive integer less than 127; the first shift value K is a positive integer less than 43, and K may be a prime number. second shift value

middle

used to represent the index number of the PSS,

The value range is {0,1,2}. The terminal device may jointly determine an SSB block index (block index) through different PSS sequences and SSS sequences and an index number (index) transmitted in the PBCH, so as to identify different SSBs.

It should be noted that the value of K may be determined by the network device, or stipulated by a protocol.

Through the above method, the PSS signal in the narrowband SSB is distinguished from the PSS signal in the NR system SSB, avoiding the false access of the PSS signal in the narrowband SSB sent by the NR terminal through the network, and avoiding unnecessary additional unnecessary detection by the NR terminal power consumption.

S402. The network device sends a first signal.

Correspondingly, the narrowband terminal device receives the first signal from the network device.

It is introduced in S401 that an SSB has an SSB time domain structure, and the terminal device needs to obtain the SSB time domain structure so as to detect the SSB. In addition, if the terminal device is initially connected, the terminal device does not know the location of the SSB, so the terminal device will perform blind detection on the SSB; or, for a terminal device in the connected state, it generally knows the location of the SSB, so it can directly Detection, that is, direct reception. Therefore, in this embodiment of the present application, "receiving" by a terminal device and "detecting" by a terminal device can be regarded as the same process, that is, "receiving" is also "detecting". Then, the terminal device detects SSB, and there may be two results:

1. The SSB is detected (that is, received);

2. The SSB is not detected (ie not received).

There is an "or" relationship between these two results.

In this embodiment of the application, before or at the same time that a terminal device receives an SSB, the terminal device needs to obtain the SSB time-frequency structure, including but not limited to the following three methods:

In the first way, the SSB time-domain structure is pre-defined by the standard, and the SSB time-domain structure is pre-configured in the terminal device, or in other words, the terminal device pre-stores the SSB time-frequency structure. At this time, the terminal device determines the SSB time-frequency structure, specifically, the terminal device obtains the SSB time-domain structure that is preconfigured or stored in the terminal device;

In the second way, the terminal device receives the first signaling, the first signaling indicates the SSB time-frequency structure, the first signaling is sent by the network device, for example, and the terminal device can determine the SSB time domain structure according to the first signaling . For example, the first signaling indicates the relative positions of the SSS and the PSS. For example, the first signaling indicates that the SSS and the PSS are adjacent in the time domain. For example, the first signaling indicates one or more of at least one SSB time domain structure introduced in the embodiments of the present application. The first signaling is, for example, high-level signaling, such as radio resource control (radio resource control, RRC) signaling or media access control control element (media access control control element, MAC CE); or, the first signaling is, for example, Physical layer signaling, such as downlink control information (downlink control information, DCI) and the like. The implementation manner of the first signaling is not limited.

In a third way, the terminal device can directly obtain the SSB time domain structure according to the narrowband capability. For example, a terminal device can access the system according to the broadband capability, and can also access the system according to the narrowband capability. If the terminal device is in a deep coverage or ultra-long coverage scenario, then the terminal device can choose to obtain the SSB time domain structure according to the narrowband capability, so as to improve the efficiency of the terminal device accessing the system. For example, it is considered that a terminal device whose supported bandwidth is greater than or equal to 5 MHz is a broadband terminal device, then the terminal device supports a bandwidth greater than or equal to 5 MHz, and the terminal device can obtain the SSB time domain structure according to the narrowband capability.

Wherein, the bandwidth occupied by the first signal (SSB) received by the terminal device in the frequency domain is equal to 12 RBs, where one RB occupies 12 subcarriers in the frequency domain. Therefore, a narrowband terminal device (with a maximum bandwidth capability equal to 12 RBs) can normally receive the SSB.

S403. The terminal device performs time-frequency synchronization and/or acquires system information according to the received first signal.

Specifically, the terminal device may synchronize with the network device according to at least one SSB, or obtain system information according to the at least one SSB, or synchronize with the network device and obtain system information according to the at least one SSB.

For example, when the SSB includes PSS, SSS and PBCH, the terminal device can first detect the PSS, then detect the SSS, obtain time-frequency synchronization and/or physical cell ID (ID), and finally detect the PBCH to obtain system information. Subsequently, the terminal device can perform data transmission with the network device based on the time-frequency synchronization and the system message.

As mentioned above, there may be multiple services and scenarios in the system, as well as terminal devices with multiple bandwidth capabilities. Therefore, there may be URLLC, eMBB, and mMTC services on one carrier, and one carrier may be used to transmit data between narrowband terminal devices and broadband terminal devices. Adopting the SSB provided by the embodiment of the present application provides convenience for services of narrowband terminal equipment, and avoids wrong access of other NR non-narrowband terminal equipment.

The following describes the devices used to implement the above methods in the embodiments of the present application with reference to the accompanying drawings. Therefore, all the content above can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 8 is a schematic block diagram of a first communication device 800 provided by an embodiment of the present application.

The first communication device 800 includes a processing module 810 and a transceiver module 820 . Exemplarily, the first communication device 800 may be a vehicle-mounted device, or may be a chip applied to the vehicle-mounted device, or other combined devices, components, etc. having the functions of the above-mentioned vehicle-mounted device. When the first communication device 800 is a vehicle-mounted device, the transceiver module 820 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 810 may be a processor, such as a baseband processor, which may include one or Multiple central processing units (central processing units, CPUs). When the first communication device 800 is a component having the functions of the above-mentioned vehicle equipment, the transceiver module 820 may be a radio frequency unit, and the processing module 810 may be a processor, such as a baseband processor. When the first communication device 800 is a system-on-a-chip, the transceiver module 820 may be an input-output interface of a chip (such as a baseband chip), and the processing module 810 may be a processor of the system-on-a-chip, and may include one or more central processing units. It should be understood that the processing module 810 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 820 may be implemented by a transceiver or a transceiver-related circuit component.

For example, the processing module 810 can be used to execute all operations performed by the network device in the embodiment shown in FIG. Data is encoded, second data is encoded, etc., and/or other processes are used to support the techniques described herein. The transceiving module 820 may be used to perform all the transceiving operations performed by the network device in the embodiment shown in FIG. 4 , and/or to support other processes of the technology described herein.

In addition, the transceiver module 820 can be a functional module, which can complete both the sending operation and the receiving operation. For example, the transceiver module 820 can be used to perform all the sending operations performed by the network device in the embodiment shown in FIG. 4 and receiving operations, for example, when performing a sending operation, the transceiver module 820 can be considered as a sending module, and when performing a receiving operation, the transceiver module 820 can be considered as a receiving module; or, the transceiver module 820 can also be two functional modules, The transceiver module 820 can be regarded as a general term for these two functional modules, the two functional modules are respectively a sending module and a receiving module, and the sending module is used to complete the sending operation, for example, the sending module can be used to implement the embodiment shown in Figure 4 For all the sending operations performed by the network device in any embodiment, the receiving module is used to complete the receiving operation. For example, the receiving module may be used to perform all the receiving operations performed by the network device in the embodiment shown in FIG. 4 .

Wherein, the processing module 810 is configured to determine a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS Adjacent to the PSS, or, the SSS and the PSS are separated by at least 2 symbols in the time domain; a transceiver module 820, configured to send the first signal.

In a possible implementation manner, the first signal includes 6 symbols in the time domain.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the second symbol in the time domain, and the PBCH is located in the third to sixth symbols in the time domain.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fourth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fifth symbol and the sixth symbol.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fifth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fourth symbol, and the sixth symbol.

In a possible implementation manner, the sequence of the PSS is generated according to the first sequence; the first sequence includes a first shift value and a second shift value; wherein the first shift value is less than A positive integer of 43; the second shift value is determined according to the number of the PSS, and the number of the PSS is used to determine a cell identity.

A possible implementation manner, the sequence d _k (n) of the PSS satisfies:

d _k (n) = 1-2x (m)

的取值范围为{0,1,2}，所述

表示PSS的编号；所述第二移位值为根据所述

确定的。 Wherein, the x(m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K is the first shift value; the

The value range of is {0,1,2}, the

Indicates the number of the PSS; the second shift value is based on the

definite.

A possible implementation manner, the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS and the SSS; or, the frequency domain position occupied by the PBCH includes the frequency domain position occupied by the PSS and the SSS frequency domain location.

In a possible implementation manner, the number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.

When the communication device is a chip-like device or circuit, the device may include a transceiver module and a processing module. Wherein, the transceiver module may be an input/output circuit and/or a communication interface; the processing module is an integrated processor or a microprocessor or an integrated circuit.

For other functions that can be realized by the first communication device 800, reference may be made to the relevant introduction of the embodiment shown in FIG. 4 , and details will not be repeated here.

FIG. 9 is a schematic block diagram of a second communication device 900 provided by an embodiment of the present application.

The second communication device 900 includes a processing module 910 and a transceiver module 920 . Exemplarily, the second communication apparatus 900 may be a narrowband terminal device, or may be a chip applied to the narrowband terminal device, or other combined devices, components, etc. having the functions of the above narrowband terminal device. When the second communication device 900 is a narrowband terminal device, the transceiver module 920 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc., and the processing module 910 may be a processor, such as a baseband processor, which may include a or multiple CPUs. When the second communication device 900 is a component having the functions of the above-mentioned narrowband terminal equipment, the transceiver module 920 may be a radio frequency unit, and the processing module 910 may be a processor, such as a baseband processor. When the second communication device 900 is a system-on-a-chip, the transceiver module 920 may be an input-output interface of a chip (such as a baseband chip), and the processing module 910 may be a processor of the system-on-a-chip, and may include one or more central processing units. It should be understood that the processing module 910 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 920 may be implemented by a transceiver or a transceiver-related circuit component.

For example, the processing module 910 may be used to execute all operations performed by the narrowband terminal device in the embodiment shown in FIG. 4 except the transceiving operation, and/or other processes for supporting the technology described herein. The transceiving module 920 may be used to perform all the transceiving operations performed by the narrowband terminal device in the embodiment shown in FIG. 4 , and/or to support other processes of the technology described herein.

In addition, for the implementation manner of the transceiver module 920 , reference may be made to the introduction of the implementation manner of the transceiver module 820 .

The processing module 910 is configured to determine a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS Adjacent to the PSS, or, the SSS is separated from the PSS by at least 2 symbols in the time domain; and the first signal is sent through the transceiver module 920 .

In a possible implementation manner, the first signal includes 6 symbols in the time domain.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the second symbol in the time domain, and the PBCH is located in the third to sixth symbols in the time domain.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fourth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fifth symbol and the sixth symbol.

In a possible implementation manner, the PSS is located in the first symbol in the time domain, the SSS is located in the fifth symbol in the time domain, and the PBCH is located in the second symbol and the third symbol in the time domain , the fourth symbol, and the sixth symbol.

A possible implementation, the method also includes:

The sequence of the PSS is generated according to the first sequence; the first sequence includes a first shift value and a second shift value;

Wherein, the first shift value is a positive integer less than 43; the second shift value is determined according to the number of the PSS, and the number of the PSS is used to determine a cell identity.

A possible implementation manner, the sequence d _k (n) of the PSS satisfies:

d _k (n) = 1-2x (m)

的取值范围为{0,1,2}，所述

表示PSS的编号；所述第二移位值是根据所述

确定。 Wherein, x(m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K represents the first shift value;

The value range of is {0,1,2}, the

Indicates the number of the PSS; the second shift value is based on the

Sure.

A possible implementation manner, the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the main PSS and the SSS; or, the frequency domain position occupied by the PBCH includes the PSS and the SSS occupied frequency domain location.

In a possible implementation manner, the number of subcarriers occupied by the PBCH in the frequency domain is at least one of the following: 144, 72, or 121.

For other functions that can be realized by the second communication device 900, reference may be made to the relevant introduction of the embodiment shown in FIG. 4 , and details will not be repeated here.

The embodiment of the present application also provides a communication device, and the communication device may be a network device or a circuit. The communication device may be used to execute the actions performed by the network device in the foregoing method embodiments.

Based on the same idea as the communication method above, as shown in FIG. 10 , an embodiment of the present application further provides a communication device 1000 . The communication device 1000 can be used to implement the method performed by the network device in the above method embodiment, and refer to the description in the above method embodiment, wherein the communication device 1000 can be a network device, a terminal device, a vehicle-mounted device, or can be located in a network device, A terminal device or a vehicle-mounted device may be a sending device or a receiving device.

The communication device 1000 includes one or more processors 1001 . The processor 1001 may be a general purpose processor or a special purpose processor or the like. For example, it may be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as network equipment, terminal equipment, vehicle equipment or chips, etc.), execute software programs, and process software programs. data. The communication device 1000 may include a transceiver unit to implement signal input (reception) and output (transmission). For example, the transceiver unit may be a transceiver, a radio frequency chip, and the like.

The communications apparatus 1000 includes one or more processors 1001, and the one or more processors 1001 can implement the method performed by the network device in the above-mentioned embodiments.

Optionally, the processor 1001 may implement other functions in addition to implementing the methods in the above-mentioned embodiments. Optionally, in an implementation manner, the processor 1001 may execute a computer program, so that the communication apparatus 1000 executes the method executed by the network device in the foregoing method embodiments. The computer program may be stored in whole or in part in the processor 1001, such as the computer program 1003, or may be stored in whole or in part in the memory 1002 coupled with the processor 1001, such as the computer program 1104, or may be shared by the computer programs 1003 and 1004. The communication apparatus 1000 is made to execute the method executed by the network device in the above method embodiment.

For example, the processor 1001 is configured to determine a first signal; wherein, the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS Adjacent to the PSS, or, the SSS is separated from the PSS by at least 2 symbols in the time domain; and the first signal is sent through the transceiver unit 1005 .

In yet another possible implementation manner, the communications apparatus 1000 may also include a circuit, and the circuit may implement the functions performed by the network device in the foregoing method embodiments.

In yet another possible implementation manner, the communication device 1000 may include one or more memories 1002, on which a computer program 1004 is stored, and the computer program may be run on a processor, so that the communication device 1000 executes the above method implementation The communication method described in the example. Optionally, data may also be stored in the memory. Optionally, computer programs and/or data may also be stored in the processor. For example, the above-mentioned one or more memories 1002 may store the associations or corresponding relationships described in the above-mentioned embodiments, or related parameters or tables involved in the above-mentioned embodiments. Wherein, the processor and the memory can be set separately, or integrated or coupled together.

In yet another possible implementation manner, the communication device 1000 may further include a transceiver unit 1005 . The processor 1001 may be referred to as a processing unit, and controls the communication device (the first communication device or the second communication device). The transceiver unit 1005 may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and is used to realize the sending and receiving of data or control signaling.

For example, if the communication device 1000 is a chip applied in a communication device or other combined devices, components, etc. having the functions of the above-mentioned communication device, the communication device 1000 may include a transceiver unit 1005 .

In yet another possible implementation manner, the communication device 1000 may further include a transceiver unit 1005 and an antenna 1006 . The processor 1001 may be referred to as a processing unit, and controls the first communication device. The transceiver unit 1005 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to realize the transceiver function of the device through the antenna 1006 .

Based on the same idea as the communication method above, as shown in FIG. 11 , the embodiment of the present application further provides a second communication device 1100 . The second communication device 1100 can be used to implement the method executed by the narrowband terminal device in the above method embodiment, and refer to the description in the above method embodiment, wherein the second communication device 1100 can be a narrowband terminal device, or can be located in a narrowband terminal device Among them, it can be the originating device or the receiving device.

The second communication device 1100 includes one or more processors 1101 . The processor 1101 may be a general-purpose processor or a special-purpose processor. For example, it may be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as network equipment, terminal equipment, vehicle equipment or chips, etc.), execute software programs, and process software programs. data. The second communication device 1100 may include a transceiver unit to implement signal input (reception) and output (transmission). For example, the transceiver unit may be a transceiver, a radio frequency chip, and the like.

The second communication apparatus 1100 includes one or more processors 1101, and the one or more processors 1101 can implement the method performed by the narrowband terminal device in the above-mentioned embodiments.

For example, the processor 1101 is configured to receive a first signal through the transceiver unit 1105; wherein the first signal includes PSS, SSS, and PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain The SSS and the PSS are adjacent in the time domain, or the SSS and the PSS are separated by at least 2 symbols in the time domain; the processor 1101 is configured to perform timing according to the received first signal frequency synchronization and/or get system messages.

Optionally, the processor 1101 may implement other functions in addition to implementing the methods in the above-mentioned embodiments. Optionally, in an implementation manner, the processor 1101 may execute a computer program, so that the second communication apparatus 1100 executes the method executed by the narrowband terminal device in the foregoing method embodiments. The computer program may be stored in whole or in part in the processor 1101, such as the computer program 1103, or may be stored in whole or in part in the memory 1102 coupled with the processor 1101, such as the computer program 1104, or may be shared by the computer programs 1103 and 1104. The second communication apparatus 1100 is made to execute the method executed by the narrowband terminal device in the above method embodiment.

In yet another possible implementation manner, the second communication apparatus 1100 may also include a circuit, and the circuit may implement the functions performed by the narrowband terminal device in the foregoing method embodiments.

In yet another possible implementation, the second communication device 1100 may include one or more memories 1102, on which a computer program 1104 is stored, and the computer program may be run on a processor, so that the second communication device 1100 Execute the communication method described in the above method embodiment. Optionally, data may also be stored in the memory. Optionally, computer programs and/or data may also be stored in the processor. For example, the above-mentioned one or more memories 1102 may store the association or corresponding relationship described in the above-mentioned embodiment, or related parameters or tables involved in the above-mentioned embodiment. Wherein, the processor and the memory can be set separately, or integrated or coupled together.

In yet another possible implementation manner, the second communication device 1100 may further include a transceiver unit 1105 . The processor 1101 may be referred to as a processing unit, and controls the second communication device. The transceiver unit 1105 may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and is used to realize the sending and receiving of data or control signaling.

For example, if the second communication device 1100 is a chip applied in a communication device or other combined devices, components, etc. having the functions of the above communication device, the second communication device 1100 may include a transceiver unit 1105 .

In yet another possible implementation manner, the second communication device 1100 may further include a transceiver unit 1105 and an antenna 1106 . The processor 1101 may be referred to as a processing unit, and controls the second communication device. The transceiver unit 1105 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to realize the transceiver function of the device through the antenna 1106 .

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiment may be completed by an integrated logic circuit of hardware in a processor or a computer program in the form of software. The aforementioned processor may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The method steps disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a computer, the method described in any method embodiment above applied to a network device or a narrowband terminal device is implemented.

An embodiment of the present application further provides a computer program product, which implements the method described in any method embodiment above applied to a network device or a narrowband terminal device when the computer program product is executed by a computer.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. A computer program product consists of one or more computer programs. When the computer program is loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be transmitted from a website site, computer, server or data center by wire ( Such as coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, a data center, etc. integrated with one or more available media. Available media may be magnetic media (e.g., floppy disk, hard disk, magnetic tape), optical media (e.g., high-density digital video disc (digital video disc, DVD)), or semiconductor media (e.g., solid state disk (solid state disk, SSD) )wait.

The embodiment of the present application also provides a communication device, including a processor and an interface; the processor is configured to execute the method described in any method embodiment applied to a network device or a narrowband terminal device.

It should be understood that the above-mentioned processing device may be a chip, and the processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor It may be a general-purpose processor, which is implemented by reading software codes stored in the memory, and the memory may be integrated in the processor, or located outside the processor and exist independently.

An embodiment of the present application provides a communication system. The communication system may include the network device or the narrowband terminal device involved in the above-mentioned embodiment shown in FIG. 4 .

The embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a computer, the computer can implement the method shown in FIG. 4 provided by the above-mentioned method embodiment. Processes related to network devices or narrowband terminal devices in the embodiments.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in Figure 4 provided by the above method embodiment Processes related to network equipment and narrowband terminal equipment.

It should be understood that the processor mentioned in the embodiment of the present application may be a CPU, or other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf Programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned computer-readable storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: the computer readable medium may include a random access memory (random access memory, RAM), a read-only memory (read-only memory, ROM), an electrically erasable programmable read-only memory (electrically erasable programmable read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), mobile hard disk, or other optical disk storage, disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The above is only the specific implementation of the application, but the protection scope of the embodiment of the application is not limited thereto, and any skilled person familiar with the technical field can easily think of changes within the technical scope disclosed in the embodiment of the application Or replacement, should be covered within the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the embodiments of the present application should be based on the scope of protection of the claims.

Claims (24)

1. A method of communication, comprising:

   determining a first signal;

   wherein, the first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH;

   the PSS, SSS and PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS, or the SSS is spaced from the PSS in the time domain by at least 2 symbols;

   and transmitting the first signal.
2. The method of claim 1, wherein the first signal comprises 6 symbols in the time domain.
3. The method of claim 1 or 2, wherein,

   the PSS is located in a first symbol in the time domain, the SSS is located in a second symbol in the time domain, and the PBCH is located in third to sixth symbols in the time domain.
4. The method of claim 1 or 2, wherein,

   the PSS is located in a first symbol in the time domain, the SSS is located in a fourth symbol in the time domain, and the PBCH is located in a second symbol, a third symbol, a fifth symbol, and a sixth symbol in the time domain.
5. The method of claim 1 or 2, wherein,

   the PSS is located in a first symbol in the time domain, the SSS is located in a fifth symbol in the time domain, and the PBCH is located in a second symbol, a third symbol, a fourth symbol, and a sixth symbol in the time domain.
6. The method of any one of claims 1-5, wherein the method further comprises:

   the sequence of the PSS is generated according to the first sequence; the first sequence comprises a first shift value and a second shift value;

   wherein the first shift value is a positive integer less than 43; the second shift value is determined according to the number of the PSS, which is used to determine the cell identity.
7. The method of claim 6, wherein the sequence d of PSS _k (n) satisfies:

   d _k (n)＝1-2x(m)

   

   wherein x (m) is a first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K represents a first shift value;

   

   The value range of (2) is {0,1,2}, said

   

   A number indicating PSS; the second shift value is according to the

   

   And (5) determining.
8. The method of any one of claim 1 to 7,

   the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS and the SSS; or,

   the frequency domain positions occupied by the PBCH comprise the frequency domain positions occupied by the PSS and the SSS.
9. The method of any of claims 1-8, wherein the number of subcarriers occupied by the PBCH in the frequency domain is at least one of: 144 72, or 121.
10. A method of communication, comprising:

    receiving a first signal;

    wherein, the first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH;

    the PSS, SSS and PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS in the time domain, or the SSS is spaced from the PSS by at least 2 symbols in the time domain;

    and carrying out time-frequency synchronization and/or acquiring a system message according to the received first signal.
11. The method of claim 10, wherein the first signal comprises 6 symbols in the time domain.
12. The method of claim 10 or 11, wherein,

    the PSS is located in a first symbol in the time domain, the SSS is located in a second symbol in the time domain, and the PBCH is located in third to sixth symbols in the time domain.
13. The method of claim 10 or 11, wherein,

    the PSS is located in a first symbol in the time domain, the SSS is located in a fourth symbol in the time domain, and the PBCH is located in a second symbol, a third symbol, a fifth symbol, and a sixth symbol in the time domain.
14. The method of claim 10 or 11, wherein,

    the PSS is located in a first symbol in the time domain, the SSS is located in a fifth symbol in the time domain, and the PBCH is located in a second symbol, a third symbol, a fourth symbol, and a sixth symbol in the time domain.
15. The method of any one of claims 10-14, wherein the method further comprises:

    the sequence of the PSS is generated according to the first sequence; the first sequence comprises a first shift value and a second shift value;

    wherein the first shift value is a positive integer less than 43; the second shift value is determined according to the number of the PSS, which is used for determining the cell identity.
16. The method of claim 15, wherein the sequence d of PSS _k (n) satisfies:

    d _k (n)＝1-2x(m)

    

    wherein x (m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; the K is the first shift value; the said

    

    The value range of (2) is {0,1,2}, said

    

    A number indicating PSS; the second shift value is according to

    

    And (3) determining.
17. The method according to any of claims 10-16, wherein the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS, SSS; or,

    the frequency domain positions occupied by the PBCH comprise the frequency domain positions occupied by the PSS and the SSS.
18. The method of any of claims 10-16, wherein the number of subcarriers occupied by the PBCH in the frequency domain is one of: 144 72, or 121.
19. A communication device comprising a processing module and a transceiver module, wherein the processing module is coupled to the transceiver module for performing the method of any of claims 1-9.
20. A communication device comprising a processing module and a transceiver module, wherein the processing module is coupled to the transceiver module for performing the method of any of claims 10-18.
21. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 9 or causes the computer to perform the method of any one of claims 10 to 18.
22. A computer program product comprising computer program instructions which, when run on a processor, cause the method of any one of claims 1 to 18 to be performed.
23. A communication system comprising a communication device according to claim 19 and comprising a communication device according to claim 20.
24. A chip comprising a processor and a communication interface, the processor being configured to read instructions through the communication interface to perform the method of any one of claims 1 to 9 or to perform the method of any one of claims 10 to 18.

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