A communication method and apparatus

Abstract

The application discloses a communication method and device, the method comprises: determining a first signal; wherein the first signal comprises a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH); the PSS, the SSS and the 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 by at least 2 symbols in the time domain; and the first signal is transmitted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular to a communication method and device. BACKGROUND

[0002] In the existing 5th generation (5G) new radio (NR) system, a terminal device can achieve synchronization with a base station and acquire system messages by receiving a synchronization signal and PBCH block (SSB). The primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBCH) jointly constitute an SSB. As shown in the figure, in the time domain, one SSB occupies 4 orthogonal frequency division multiplexing (OFDM) symbols, namely symbol 0-symbol 3, and in the frequency domain, one SSB occupies 20 resource blocks (RBs), that is, 240 subcarriers, and within the 20 RBs, the subcarrier numbers are 0-239. 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. Figure 1

[0003] At present, one SSB occupies 20 RBs in the frequency domain, and the bandwidth occupied by the SSB is too large, which cannot be compatible with the SSB access of narrowband terminal devices. SUMMARY

[0004] The present application provides a communication method and device to solve the problem that the existing SSB is not suitable for narrowband terminal devices.

[0005] 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 can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method, for example, a chip. The method comprises: determining a first signal; wherein the first signal comprises a PSS, an SSS and a PBCH; the PSS, the SSS 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 transmitting the first signal. ​

[0006] By the above method, the network device determines that, in the first signal, the SSS is adjacent to the PSS, or the SSS is spaced apart from the PSS by at least 2 symbols in the time domain, so that the narrowband terminal device can determine, based on the relative positions of the SSS and the PSS in the first signal, that the first signal is the SSB signal corresponding to the narrowband terminal device. Avoiding the false access of the wideband 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.

[0007] In a possible implementation, the first signal includes 6 symbols in the time domain.

[0008] By the above method, it can be ensured that the PBCH in the SSB corresponding to the narrowband terminal device in the embodiment of the application occupies enough symbols in the time domain, so as to ensure that the narrowband terminal device and the NR terminal device in NR achieve the same coverage.

[0009] In a possible implementation, the PSS is located at the first symbol in the time domain, the SSS is located at the second symbol in the time domain, and the PBCH is located at the third to sixth symbols in the time domain.

[0010] By this method, the configuration of the PBCH can be more uniform, so that the overall peak-to-average ratio of the SSB signal can be set more evenly. The requirements of the terminal device for detecting the SSB can be reduced, and the applicability of the SSB can be improved.

[0011] In a possible implementation, the PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

[0012] In a possible implementation, the PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

[0013] By the above method, the flexibility of the design of the narrowband SSB can be improved to adapt to more application scenarios of the narrowband terminal device.

[0014] In a possible implementation, a sequence of the PSS is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; the first shift value is a positive integer less than 43; and the second shift value is determined according to a number of the PSS, and the number of the PSS is used to determine a cell identity.

[0015] The PSS sequence is additionally increased by a first shift value to distinguish the PSS signal in the SSB in the NR. Thus, the NR terminal device can not blindly detect the narrowband PSS in the application embodiment when blindly detecting the PSS. 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 the NR non-narrowband terminal device and reducing the power consumption of the NR non-narrowband terminal device.

[0016] In a possible implementation, the sequence d of the PSS satisfies k (n) satisfies:

[0017] d k (n) = 1-2x(m)

[0018]

[0019] wherein x(m) is a first sequence; mod represents a modulo operation; n is a positive integer less than 127; and the K represents a first shift value. The value range of K is {0, 1, 2}, and the K represents the number of the PSS; and the second shift value is determined according to the K.

[0020] In a possible implementation, the PBCH occupies the same frequency domain position as 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.

[0021] Compared with the PBCH in the prior art, the frequency domain bandwidth occupied by the PBCH of the first signal is reduced, and the narrowband terminal device and the narrowband Internet of Things scenario can be better adapted.

[0022] In a possible implementation, the number of subcarriers occupied by the PBCH in the frequency domain is at least one of 144, 72, or 121.

[0023] In a second aspect, the application provides a communication method, which can be executed by a second communication device. The second communication device can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method, for example, a narrowband terminal device or a chip. Illustratively, when the communication method is applied to a vehicle, the first communication device can be a vehicle-mounted device, or a chip arranged in the vehicle-mounted device to implement the functions of the vehicle-mounted device, or other components for implementing the functions of the vehicle-mounted device. It can also be a narrowband terminal device, or a chip arranged in the narrowband terminal device to implement the functions of the narrowband terminal device, or other components for implementing the functions of the narrowband terminal device.​

[0024] The method comprises: receiving a first signal; wherein the first signal comprises a PSS, a SSS and a PBCH; 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 is spaced apart from the PSS by at least 2 symbols in the time domain; and performing time-frequency synchronization and / or acquiring system messages according to the received first signal.

[0025] By the above method, the narrow-band terminal device can determine the first signal as the SSB signal corresponding to the narrow-band terminal device based on the SSS being adjacent to the PSS in the time domain or the SSS being spaced apart from the PSS by at least 2 symbols in the time domain in the first signal, and then perform time-frequency synchronization and / or acquire system messages through the first signal. This avoids the misaccess of the wide-band terminal device and other non-narrow-band terminal devices in the NR system caused by the detection of the SSS of the first signal by other non-narrow-band terminal devices in the NR.

[0026] In a possible implementation, the first signal comprises 6 symbols in the time domain.

[0027] By the above method, it can be ensured that the PBCH in the SSB corresponding to the narrow-band terminal device in the embodiments of the present application occupies sufficient time units, thereby ensuring that the narrow-band terminal device and the NR terminal device in the NR reach the same coverage.

[0028] In a possible implementation, 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.

[0029] By this method, the configuration of the PBCH can be more uniform, so that the overall peak-to-average ratio of the SSB signal can be set more evenly. This can reduce the requirement of the terminal device for detecting the SSB and improve the applicability of the SSB.

[0030] In a possible implementation, 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, the third symbol, the fifth symbol and the sixth symbol in the time domain.

[0031] By 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 narrow-band terminal device and the NR terminal device in the NR reach the same coverage while avoiding the misaccess of the NR terminal device on the first signal. This can reduce the false detection of the SSS by the non-narrow-band terminal device in the NR, thereby reducing the power consumption of the non-narrow-band terminal device.

[0032] In a possible implementation, the PSS is located at a first symbol in the time domain, the SSS is located at a fifth symbol in the time domain, and the PBCH is located at a second symbol, a third symbol, a fourth symbol, and a sixth symbol in the time domain.

[0033] By the method, flexibility of design of the narrow-band SSB can be improved to adapt to more application scenarios of the narrow-band terminal device.

[0034] In a possible implementation, a sequence of the PSS is generated according to a first sequence, the first sequence includes a first shift value and a second shift value, the first shift value is a positive integer less than 43, and the second shift value is determined according to a number of the PSS, and the number of the PSS is used to determine a cell identifier.

[0035] By additionally adding a shift value in the PSS sequence, the PSS signal in the SSB in the NR can be distinguished. Therefore, when the NR terminal device blindly detects the PSS, the narrow-band PSS in the embodiment of the application cannot be blindly detected. Correspondingly, the narrow-band terminal device can determine, based on the blindly detected narrow-band PSS, that the SSB signal is the SSB corresponding to the narrow-band terminal device, thereby further reducing the false detection of the NR non-narrow-band terminal device and reducing the power consumption of the NR non-narrow-band terminal device.

[0036] In a possible implementation, a sequence of the PSS is generated according to a first sequence, the first sequence includes a first shift value and a second shift value, the first shift value is a positive integer less than 43, and the second shift value is determined according to a number of the PSS, and the number of the PSS is used to determine a cell identifier. k (n) satisfies:

[0037] d k (n) = 1-2x(m)

[0038]

[0039] 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 value range of the K is {0, 1, 2}, and the number of the PSS is represented by n. The second shift value is determined according to the

[0040] In a possible implementation, a frequency domain position occupied by the PBCH is the same as a 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.

[0041] Compared with the PBCH in the prior art, the frequency domain bandwidth occupied by the PBCH of the first signal is reduced, and the narrow-band terminal device and the narrow-band Internet of Things scenario can be better adapted.

[0042] In a possible implementation, the number of subcarriers occupied by the PBCH in the frequency domain is one of: 144, 72, or 121.

[0043] In a third aspect, the present application provides a communication apparatus, for example, the communication apparatus is the first communication apparatus as described above. The first communication apparatus is configured to perform the method in the first aspect or any possible implementation. Specifically, the first communication apparatus can include a module configured to perform the method in the first aspect or any possible implementation, for example, a processing module and a transceiver module.

[0044] The transceiver module can include a transmitting module and a receiving module, which can be different functional modules or the same functional module but can implement different functions (the transmitting module is configured to implement the function of transmitting signals, and the receiving module is configured to implement the function of receiving signals). The first communication apparatus is a communication device or a chip or other component arranged in the communication device. The communication device is a network device or a chip or other component arranged in the network device. The transceiver module can be implemented by a transceiver, and the processing module can be implemented by a processor. Alternatively, the transmitting module can be implemented by a transmitter, and the receiving module can be implemented by a receiver, which can be different functional modules or the same functional module but can implement different functions (the transmitter is configured to implement the function of transmitting signals, and the receiver is configured to implement the function of receiving signals). If the first communication apparatus is a communication device, the transceiver is implemented by, for example, an antenna, a feed line, a codec, and the like in the communication device. Alternatively, if the first communication apparatus is a chip arranged in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface (or an interface circuit) in the chip, which is connected to a radio frequency transceiving component in the communication device to implement the transceiving of information through the radio frequency transceiving component. In the introduction of the third aspect, the processing module and the transceiver module are taken as examples for introduction. The communication apparatus is taken as the first communication apparatus, and

[0045] The processing module is configured to determine a first signal. The first signal includes a PSS, an SSS, and a PBCH. The PSS, the SSS, and the PBCH are located in different symbols in the time domain. The SSS is adjacent to the PSS, or the SSS is spaced apart from the PSS by at least two symbols in the time domain.

[0046] The transceiver module is configured to transmit the first signal.

[0047] In a fourth aspect, the present application provides a communication device, for example, the communication device is the second communication device as described above. The second communication device is configured to perform the method in the second aspect or any possible implementation manner. Specifically, the second communication device can include a module configured to perform the method in the second aspect or any possible implementation manner, for example, a processing module and a transceiver module.

[0048] The transceiver module can include a transmitting module and a receiving module, which can be different functional modules or the same functional module but can implement different functions (the transmitting module is configured to implement the function of transmitting signals, and the receiving module is configured to implement the function of receiving signals). The second communication device is a communication device or a chip or other components arranged in the communication device. The communication device is a narrowband terminal device or a chip or other components arranged in the narrowband terminal device. The transceiver module can be implemented by a transceiver, and the processing module can be implemented by a processor. Alternatively, the transmitting module can be implemented by a transmitter, and the receiving module can be implemented by a receiver. The transmitter and the receiver can be different functional modules or the same functional module but can implement different functions (the transmitter is configured to implement the function of transmitting signals, and the receiver is configured to implement the function of receiving signals). If the first communication device is a communication device, the transceiver is implemented by, for example, an antenna, a feed line, a codec and the like in the communication device. Alternatively, if the first communication device is a chip arranged in the communication device, the transceiver (or the transmitter and the receiver) is, for example, a communication interface (or an interface circuit) in the chip, which is connected with a radio frequency transceiving component in the communication device to implement the transceiving of information through the radio frequency transceiving component. In the introduction of the fourth aspect, the processing module and the transceiver module are taken as examples for introduction. The communication device is taken as the second communication device, wherein,

[0049] The transceiver module is configured to receive a first signal. The first signal includes a PSS, an SSS and a PBCH. 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 is spaced apart from the PSS by at least 2 symbols in the time domain.

[0050] The processing module is configured to perform time-frequency synchronization and / or acquire system messages according to the received first signal.

[0051] In a fifth aspect, a communication apparatus, for example, a first communication apparatus, is provided. The communication apparatus can include a processor and a communication interface (or interface circuitry) configured to communicate with another apparatus or device. Optionally, the communication apparatus can further include a memory configured to store computer instructions. The processor and the memory can be coupled to each other and configured to implement the method described in the first aspect or various possible implementations of the first aspect. Alternatively, the first communication apparatus can not include the memory, and the memory can be located outside the first communication apparatus. The processor, the memory, and the communication interface can be coupled to each other and configured to implement the method described in the first aspect or various possible implementations of the first aspect. For example, the processor can be configured to cause the first communication apparatus to perform the method in the first aspect or any possible implementation of the first aspect, when the processor executes the computer instructions stored in the memory. The first communication apparatus can be, for example, a communication device or a chip or other component implemented in the communication device. The communication device can be, for example, a network device. For example, the first communication apparatus can be an access network device or a chip or other component implemented in the access network device.

[0052] If the first communication apparatus is a communication device, the communication interface can be implemented, for example, by a transceiver (or a transmitter and a receiver) in the communication device, for example, by an antenna, a feed line, a codec, and the like in the communication device. Alternatively, if the first communication apparatus is a chip implemented in the communication device, the communication interface can be, for example, an input / output interface (for example, an input / output pin or the like) of the chip, which is connected to a radio frequency transceiving component in the communication device to implement the transmission and reception of information through the radio frequency transceiving component.

[0053] In a sixth aspect, a communication apparatus, for example, a second communication apparatus, is provided. The communication apparatus can include a processor and a communication interface (or interface circuitry) configured to communicate with another apparatus or device. Optionally, the communication apparatus can further include a memory configured to store computer instructions. The processor and the memory can be coupled to each other and configured to implement the method described in the second aspect or various possible implementations of the second aspect. Alternatively, the second communication apparatus can not include the memory, and the memory can be located outside the second communication apparatus. The processor, the memory, and the communication interface can be coupled to each other and configured to implement the method described in the second aspect or various possible implementations of the second aspect. For example, the processor can be configured to cause the second communication apparatus to perform the method in the second aspect or any possible implementation of the second aspect, when the processor executes the computer instructions stored in the memory. The second communication apparatus can be, for example, a communication device or a chip or other component implemented in the communication device. The communication device can be, for example, a narrowband terminal device or a vehicle-mounted device. For example, the second communication apparatus can be a narrowband terminal device or a chip or other component implemented in the narrowband terminal device.

[0054] If the second communication device is a communication apparatus, the communication interface is implemented by, for example, a transceiver (or a transmitter and a receiver) in the communication apparatus, for example, the transceiver is implemented by an antenna, a feed line, a codec and the like in the communication apparatus. Or, if the second communication device is a chip arranged in the communication apparatus, the communication interface is, for example, an input / output interface of the chip, for example, an input / output pin or the like, which is connected with a radio frequency transceiving component in the communication apparatus to realize the transceiving of information through the radio frequency transceiving component.

[0055] In a seventh aspect, a chip is provided, which includes a processor and a communication interface, the processor being coupled with the communication interface, and used to implement the method provided in the first aspect or any possible implementation manner.

[0056] Optionally, the chip can further include a memory, for example, the processor can read and execute a software program stored in the memory to implement the method provided in the first aspect or any possible implementation manner. Or, the memory can not be included in the chip, but located outside the chip, that is, the processor can read and execute a software program stored in the external memory to implement the method provided in the first aspect or any possible implementation manner.

[0057] In an eighth aspect, a chip is provided, which includes a processor and a communication interface, the processor being coupled with the communication interface, and used to implement the method provided in the second aspect or any possible implementation manner.

[0058] Optionally, the chip can further include a memory, for example, the processor can read and execute a software program stored in the memory to implement the method provided in the second aspect or any possible implementation manner. Or, the memory can not be included in the chip, but located outside the chip, that is, the processor can read and execute a software program stored in the external memory to implement the method provided in the second aspect or any possible implementation manner.

[0059] In a ninth aspect, a communication system is provided, which includes the communication device provided in the third aspect, the communication device provided in the fifth aspect or the communication device provided in the seventh aspect, and includes the communication device provided in the fourth aspect, the communication device provided in the sixth aspect or the communication device provided in the eighth aspect.

[0060] In a tenth aspect, a computer readable storage medium is provided, which is used to store a computer program, when the computer program is run on a computer, so as to make the computer execute the method provided in the first aspect or any possible implementation manner.

[0061] In a eleventh aspect, a computer readable storage medium is provided, which is configured to store a computer program, and when the computer program is run on a computer, the computer is enabled to perform the method in the second aspect or any possible implementation manner thereof.

[0062] In a twelfth aspect, a computer program product is provided, which is configured to store a computer program, and when the computer program is run on a computer, the computer is enabled to perform the method in the first aspect or any possible implementation manner thereof.

[0063] In a thirteenth aspect, a computer program product is provided, which is configured to store a computer program, and when the computer program is run on a computer, the computer is enabled to perform the method in the second aspect or any possible implementation manner thereof. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 A schematic diagram of SSB design in the prior art;

[0065] Figure 2 A schematic diagram of a communication system provided by an embodiment of the present application;

[0066] Figure 3 A schematic diagram of a communication system provided by an embodiment of the present application;

[0067] Figure 4 A schematic diagram of a communication method flow provided by an embodiment of the present application;

[0068] Figures 5 to 7 A schematic diagram of SSB design provided by an embodiment of the present application;

[0069] Figure 8 A schematic diagram of a structure of a communication device provided by an embodiment of the present application;

[0070] Figure 9 A schematic diagram of a structure of a communication device provided by an embodiment of the present application;

[0071] Figure 10 A schematic diagram of a structure of a communication device provided by an embodiment of the present application;

[0072] Figure 11 A schematic diagram of a structure of a communication device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0073] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0074] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a long term evolution (LTE) system, a worldwide interoperability for microwave access (WiMAX) communication system, a future 5th generation (5G) system, such as a new radio access technology (NR), and a future communication system, such as a 6G system, etc.

[0075] The technical solutions of the embodiments of the present application can be applied to the technical fields of unmanned 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, cooperative vehicle infrastructure (CVIS), intelligent transport system (ITS), vehicular communication, etc.

[0076] In the following, some terms in the embodiments of the present application are explained and described, so as to facilitate the understanding of those skilled in the art.

[0077] 1) terminal device, including a device that provides voice and / or data connectivity to a user, e.g., a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal device can communicate with a core network via a radio access network (RAN), exchanging voice and / or data with the RAN. The terminal device can include a user equipment (UE), wireless terminal device, mobile terminal device, device-to-device (D2D) terminal device, V2X terminal device, machine-to-machine / machine-type communications (M2M / MTC) terminal device, internet of things (IoT) terminal device, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user device, etc. For example, can include a mobile phone (or so-called "cellular" phone), a computer with mobile terminal device, portable, pocket, handheld, built-in calling device of a computer, etc. For example, personal communication service (PCS) phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), etc. Also includes limited devices, such as low-power devices, or limited storage devices, or limited computing devices, etc. For example, bar code, radio frequency identification (RFID), sensor, global positioning system (GPS), laser scanner, etc. Information sensing device.

[0078] As an example but not limitation, in embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a smart wearable device or a smart wearable device, etc., which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes, etc. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a powerful function realized through software support and data interaction, cloud interaction. The broad sense of wearable smart devices includes full-featured, large-size devices that can realize complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and devices that focus on a certain application function and need to cooperate with other devices such as smart phones, such as various smart wristbands, smart helmets, smart jewelry, etc. for monitoring vital signs.

[0079] And various terminal devices as introduced above, if located on a vehicle (for example, placed in or installed in a vehicle), can be considered as a vehicle-mounted terminal device, which is also referred to as an on-board unit (OBU) for example.

[0080] In embodiments of the present application, the terminal device can also include a relay. Or it can be understood that all devices capable of data communication with the base station can be regarded as terminal devices.

[0081] Embodiments of the present application can involve two types of terminal devices: wideband terminal devices and narrowband terminal devices. Among them, the conditions that the wideband terminal device and the narrowband terminal device need to meet include but are not limited to the following several conditions:

[0082] (1) In the embodiments of the present application, the maximum bandwidth capability of the narrowband terminal device is less than or equal to the minimum bandwidth capability of the wideband terminal device. Taking the narrowband terminal device as a narrowband internet of things (NB-IoT) terminal device and the wideband terminal device as a long term evolution (LTE) terminal device as an example, the data transmission bandwidth of the NB-IoT terminal device is 1 RB, that is, 180 kHz or 200 kHz (including a guard band). Since the frequency resource occupied by the PSS / SSS under the LTE system is 6 RB, that is, 1.08 MHz or 1.44 MHz (including a guard band), the minimum bandwidth capability of the wideband terminal device can be considered to be no less than 1.08 MHz. In this case, it can be considered that the maximum bandwidth capability of the narrowband terminal device is less than or equal to the minimum bandwidth capability of the wideband terminal device. For another example, the narrowband terminal device is an NB-IoT terminal device, and the wideband terminal device is an NR terminal device. Based on the design of the SSB of the NR system, the minimum bandwidth capability of the NR terminal device can be considered to be 20 RBs, each of which includes 12 subcarriers. In the NR system, the subcarrier spacing is related to the frequency band deployed by the NR system and is not a fixed value. Taking the smallest subcarrier spacing 15 kHz as an example, the minimum bandwidth capability can be considered to be greater than or equal to 20*12*15 = 3.6 MHz. It can still be considered that the maximum bandwidth capability of the narrowband terminal device is less than or equal to the minimum bandwidth capability of the wideband terminal device.

[0083] (2) In the embodiments of the present application, it can also be considered that the minimum bandwidth capability of the narrowband terminal device is less than the minimum bandwidth capability of the wideband terminal device. If a data transmission channel is established between the terminal device and the network device, generally, the terminal device needs to receive the synchronization channel and the broadcast channel sent by the network device first, and therefore, it can be considered that the bandwidth corresponding to the synchronization channel and the broadcast channel sent by the network device is the minimum bandwidth capability required by the terminal device.

[0084] Based on (1) and (2), the narrowband terminal device can also be considered as a bandwidth limited (BL) terminal device. It needs to be noted that the BL terminal device can also have other bandwidth characteristics other than (1) and (2), which are not limited in particular.

[0085] (3) In the embodiments of the present application, the narrowband terminal device can also be considered to need to keep normal data communication with the network device by coverage enhancement (CE) technology, while the wideband terminal device can keep normal data communication with the network device even without CE technology. The CE technology includes but is not limited to data repeated transmission or power boosting technology. Alternatively, if the wideband terminal device and the narrowband terminal device both need to keep normal data communication with the network device by data repeated transmission in some scenarios, the maximum number of repetitions required by the narrowband terminal device to keep data communication with the network device is less than the maximum number of repetitions required by the wideband terminal device to keep data communication with the network device.

[0086] (4) In the embodiments of the present application, the narrowband terminal device can also be considered as a low-power wide coverage access (LPWA) terminal device, and the wideband terminal device can be considered as an enhanced mobile broadband (eMBB) terminal device or an ultra-reliability low-latency communication (URLLC) terminal device.

[0087] In addition, in the embodiments of the present application, the same terminal device can have both narrowband capability and wideband capability, that is, the terminal device can act as both a wideband terminal device and a narrowband terminal device, or in other words, the terminal device has both non-CE and CE capability, and the terminal device can keep normal communication with the access network device without CE technology or with CE technology. Alternatively, a terminal device can only have narrowband capability and not have wideband capability, that is, the terminal device is only a narrowband terminal device and not a wideband terminal device, and so on, that is, the terminal device can only keep normal communication with the access network device by relying on CE technology. Both of the two terminal devices can apply the technical solutions provided in the embodiments of the present application.

[0088] 2) Network device, for example, including access network (AN) device, for example, base station (for example, access point), can refer to the device in the access network which communicates with wireless terminal device through one or more cells in the air interface, or for example, a network device in a V2X technology is a road side unit (RSU). The base station can be used to convert the received air frame and Internet protocol (IP) packet, as a router between the terminal device and the rest of the access network, wherein the rest of the access network can include an IP network. The RSU can be a fixed infrastructure entity supporting V2X application, and can exchange messages with other entities supporting V2X application. The network device can also coordinate the management of the properties of the air interface. For example, the network device can include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or long term evolution-advanced (LTE-A), or can also include a next generation node B (gNB) in a 5G NR system, or can also include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system, and the embodiments of the present application are not limited.

[0089] 3) In the embodiments of the present application, the mentioned cell can be the cell corresponding to the base station, and the cell can belong to the macro base station or the base station corresponding to the small cell. The small cell here can include: metro cell, micro cell, pico cell, femto cell, etc., which have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission service.

[0090] There can be multiple cells operating on the same carrier in the same frequency in the LTE system or the NR system, and in some special scenarios, the carrier and the cell can be considered as the same concept. For example, in the carrier aggregation (CA) scenario, when the secondary carrier is configured for the terminal device, the carrier index of the secondary carrier and the cell identification (Cell ID) of the secondary cell operating on the secondary carrier are carried at the same time, and in this case, the carrier and the cell can be considered as the same concept, for example, the terminal device accessing a carrier and accessing a cell are equivalent. For the dual connectivity (DC) scenario, similar descriptions are also available. In the embodiments of the present application, the concept of cell is introduced. In the NR system, if there is only one activated bandwidth part (BWP) on a cell or a carrier, the concept of cell and BWP can also be considered as the same.

[0091] 4) Air interface resource, in a cell, the base station and the UE can perform data transmission through the air interface (user to network interface, Uu) resource. The air interface resource can include time domain resource and frequency domain resource, and the time domain resource and the frequency domain resource can also be referred to as time-frequency resource. The frequency domain resource can be located in a set frequency range, which can also be referred to as a frequency band or a frequency band, and the width of the frequency domain resource can be referred to as bandwidth (bandwidth, BW).

[0092] 5) Time-frequency resource, the time-frequency resource can be a resource grid, including time domain and frequency domain. For example, the time domain unit can be a symbol, and the frequency domain unit can be a subcarrier. The smallest resource unit in the resource grid can be referred to as a resource element (RE). One resource block (resource block, RB) can include one or more subcarriers in the frequency domain, such as 12 subcarriers. One time slot can include one or more symbols in the time domain, such as 14 symbols (in the case of cyclic prefix (CP)) or 12 symbols (in the case of extended cyclic prefix) in NR. The frequency domain resource is usually in the unit of orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple, OFDM) symbol, sub-slot, slot, subframe or frame. It should be noted that the terms "time-frequency resource" and "resource" in the embodiments of the present application can be used interchangeably.

[0093] 6) Time domain resource, including time unit, which can be slot, mini-slot, symbol or other time domain granularity (such as system frame, subframe), wherein one slot can include at least one symbol, for example, 14 symbols or 12 symbols.

[0094] In 5G NR, one slot can be composed of at least one of symbols used for downlink transmission, symbols used for flexible, symbols used for uplink transmission, etc., so that the composition of the slot is called different slot format (SF), and there can be up to 256 slot formats.

[0095] The slot can have different slot types, and different slot types include different numbers of symbols, such as mini-slot (mini slot) containing less than 7 symbols, 2 symbols, 3 symbols, 4 symbols, etc., and normal slot (slot) containing 7 symbols or 14 symbols, etc. According to different subcarrier spacings, the length of each symbol can be different, so the length of the slot can be different.

[0096] 7) Frequency domain resource, since the single carrier bandwidth of 5G NR can reach 400MHz, a bandwidth part (BWP) is defined within one carrier, which can also be called a carrier bandwidth part. The BWP includes a plurality of resource units, such as resource blocks (RBs), in the frequency domain. The bandwidth part can be a downlink or uplink bandwidth part, and the terminal device receives or transmits data on the data channel in the activated bandwidth part. The frequency domain resource can include a subchannel, a band, a carrier, a bandwidth part (BWP), a resource block (RB), a resource element (RE), or a resource pool, etc. Among them, the RB occupies 1 subframe or 1 slot in the time domain, and occupies a plurality of contiguous subcarriers in the frequency domain. In LTE, the PRB occupies 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols in a subframe in the time domain, and occupies 12 contiguous subcarriers in the frequency domain. The subchannel is the smallest unit of frequency domain resource occupied by the physical sidelink shared channel, and one subchannel can include one or more resource blocks (RBs). The bandwidth of the wireless communication system in the frequency domain can include a plurality of RBs, for example, in the possible bandwidths of the LTE system, the included PRBs can be 6, 15, 25, 50, etc.

[0097] 8) sequence resource, also referred to as code domain resource, is used to indicate the related parameters of a sequence. 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; for a low peak-to-average ratio sequence (e.g., a Zadoff-Chu sequence), the parameters of the sequence include a root sequence, a mask, a scrambling code, a cyclic shift (CS), an orthogonal cover code (OCC), etc.

[0098] The initial value of the sequence refers to the initial value of the shift register for generating a sequence for a random sequence (e.g., a Gold sequence or an m-sequence).

[0099] 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 the random sequence used for transmission, a is the initial position of the random sequence, and L is the length of the random sequence. Generally, a is a non-negative integer, such as 0 or 2.

[0100] For example, the sequence of the synchronization signal can be generated in the following manner:

[0101] r l (n) = (1 - 2c(n))

[0102] where n = 0, 1, 2, …; r l () represents the sequence of the synchronization signal; c(n) is a random sequence, for example, a Gold sequence or an m-sequence of a 31-bit or 31-bit shift register.

[0103] 9) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0104] And, unless otherwise stated, the ordinal numbers 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 importance of the multiple objects. For example, the first synchronization signal and the second synchronization signal are only used to distinguish different synchronization signals, and do not represent the difference in content, priority, sending order or importance of the two synchronization signals.

[0105] As introduced above, some concepts related to the embodiments of the present application are introduced, and the technical features of the embodiments of the present application are introduced below.

[0106] 5G NR is a global 5G standard based on OFDM air interface design, and is also a very important basis for the next generation of cellular mobile technology. The services of 5G technology are very diverse, which can be oriented to eMBB, URLLC and massive machine type communication (massive machine-type communication, mMTC).

[0107] The diversification of NR system services makes the design of the NR system meet the access requirements of terminal devices with different bandwidth capabilities. For example, eMBB terminal devices can access the NR system by obtaining wideband 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 example, even for the same type of service, such as mMTC, there are different service rate requirements, such as meter reading, tracking and tracing, or on-demand payment, etc. The terminal device has a low requirement for data transmission rate, but generally requires deep coverage, which can generally be accessed through narrowband; on the other hand, for example, monitoring video backhaul, etc. The requirement for data transmission rate is relatively high, so it can be regarded as a terminal device with medium-high capability, which can generally be accessed through wideband.

[0108] On the other hand, with the diversification of NR system services, the capabilities of terminal devices under the NR system also present diversification, which can work under different system bandwidths.

[0109] In the existing NR system, the terminal device can achieve synchronization with the base station and obtain system messages by receiving the SSB. Among them, PSS, SSS and PBCH jointly constitute an SSB. For example, as shown in FIG. 1, the SSB includes PSS, SSS and PBCH. Figure 1As shown, in time domain, 1 SSB occupies 4 OFDM symbols, symbol 0~symbol 3, in frequency domain, 1 SSB occupies 20 RBs, that is, 240 subcarriers, among the 20 RBs, the subcarrier number is 0~239. PSS is located on the middle 127 subcarriers of symbol 0, and SSS is located on the middle 127 subcarriers of symbol 2. Among them, PSS and SSS signals occupy 1 symbol in time domain and 12 RBs in frequency domain, including 128 subcarriers. Specifically as follows Figure 1 As shown, among them, the first OFDM symbol from the left carries PSS, the subcarriers numbered 0, 1, …, 55, 183, 184, …, 239 are set to 0, and the subcarriers numbered 56, 57, …, 182 are PSS occupied subcarriers; The 2nd and 4th OFDM symbols from the left carry PBCH, and every 4 consecutive subcarriers have one corresponding to DMRS of PBCH; The 3rd OFDM symbol from the left carries SSS and PBCH, the subcarriers numbered 56, 57, …, 182 are SSS, and the subcarriers numbered 0, 1, …, 47, 192, 193, …, 239 are PBCH. In order to protect PSS and SSS, different protection subcarriers are set to 0, that is, the protection subcarriers are not used to carry signals, 8 subcarriers and 9 subcarriers are left on both sides of SSS as guard band subcarriers, such as Figure 1 The blank area on both sides of SSS in the above figure is the protection subcarrier. PBCH occupies all subcarriers of symbol 1 and symbol 3, and occupies part of the remaining subcarriers (subcarriers other than protection subcarriers) in all subcarriers of symbol 2 except the subcarriers occupied by SSS.

[0110] Future terminal devices have various bandwidth capabilities, such as narrowband capability and wideband capability, and also face more diversified application scenarios and service scenarios. Considering the bandwidth limitation of narrowband Internet of Things (NB-IoT) terminal, the bandwidth occupied by the PBCH signal in the SSB of the NR system is too large for narrowband access of the NB-IoT device, which causes the SSB in the NR system to not meet the access requirement of the NB-IoT device, and the SSB of the NB-IoT device cannot access the NR system. For narrowband terminal devices with a bandwidth less than 20 RBs, the current SSB cannot be detected. Considering that the narrowband SSB is a public signal, the base station needs to always send the SSB, and therefore, it is necessary to minimize the impact of the SSB sent by the existing base station on the energy saving mechanism. In view of this, the technical solutions of the embodiments of the present application are provided. The embodiments of the present application provide a new SSB, which is equivalent to that the signals can be sent in multiple symbols in the time domain, and the embodiments of the present application limit the frequency domain range of the SSB to be the same as that of the PSS and the SSS, and 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 is spaced apart from the PSS by at least two symbols in the time domain; so that the SSB provided by the embodiments of the present application can meet the coverage performance requirement of the SSB of the narrowband terminal device, and can also avoid that other terminal devices in the NR system mistakenly detect the SSB of the narrowband terminal device, thereby improving the performance of the SSB for the narrowband terminal device and improving the pertinence of the SSB.

[0111] The technical solutions provided by the embodiments of the present application can be applied to a wireless communication system, including a 4.5G or 5G wireless communication system, a further evolved system based on LTE or NR, and a future wireless communication system.

[0112] The first application scenario of the embodiments of the present application can be a wireless communication system capable of simultaneously serving terminal devices with different bandwidth capabilities. For example, the LTE system or the NR system can simultaneously serve mMTC terminal devices and eMBB terminal devices.

[0113] Please refer to Figure 2 , an exemplary architecture diagram of a communication system 100 of an embodiment of the present application. The methods in the embodiments of the present application can be applied to Figure 2 the communication system 100 shown in the figure. The communication system 100 can be a PLMN network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, an IoT network, or other networks. In addition, the terminal devices 104-106 can also form a communication system. Figure 2 The network architecture shown is applicable to the first application scenario of the embodiments of the present application.

[0114] Figure 2 In the illustrated communication system 100, the network device and the terminal devices 101-106 form a communication system 100. In the communication system 100, the network device can send downlink data to the terminal devices 101-106, and of course, the terminal devices 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.

[0115] Figure 2 The network device or the terminal device in the communication system can be hardware, or functionally divided software, or a combination of the two. Figure 2 The network device or the terminal device in the communication system can communicate with each other through other devices or network elements.

[0116] Figure 2 The terminal device in the communication system can include two types of terminal devices, namely a first terminal device and a second terminal device 2, both of which can be connected to the network device. Taking the first terminal device as an example, which is a terminal device supporting wideband capability, for example, the first terminal device can be a terminal device of the existing Release 15 NR, and taking the second terminal device as an example, which is a terminal device supporting narrowband capability, for example, a terminal device of future narrowband mMTC.

[0117] It should be understood that, of course Figure 2 The number of terminal devices in the communication system is only an example, and the communication system 100 to which the method of the embodiments of the present application can be applied can include more or fewer network devices or terminal devices. In actual applications, the network device can serve multiple terminal devices.

[0118] The second application scenario of the embodiments of the present application can be a wireless communication system that can only serve terminal devices with narrowband capability, for example, an LTE system or an NR system that only serves NB-IoT terminal devices.

[0119] Please refer to Figure 2 Another network architecture to which the embodiments of the present application can be applied is Figure 3 The illustrated network architecture is applicable to the second application scenario of the embodiments of the present application.

[0120] Figure 3 The network device and a terminal device in the communication system can be connected, for example, the terminal device is a terminal device supporting narrowband capability, for example, an NB-IoT terminal device. Of course Figure 3 The number of terminal devices in the communication system is only an example, and in actual applications, the network device can serve multiple terminal devices.

[0121] Figure 2 orFigure 3 The network device in the network architecture 1000 is, for example, an access network device, such as a base station. In different systems, the network device corresponds to different devices. For example, in a fourth generation mobile communication technology (4G) system, the network device can correspond to an eNB, and in a 5G system, the network device corresponds to a network device in 5G, such as a gNB. th The network device in the network architecture 1000 is, for example, an access network device, such as a base station. In different systems, the network device corresponds to different devices. For example, in a fourth generation mobile communication technology (4G) system, the network device can correspond to an eNB, and in a 5G system, the network device corresponds to a network device in 5G, such as a gNB.

[0122] Next, the technical solutions provided by the embodiments of the present application are described in combination with the drawings.

[0123] The present embodiment provides a communication method, please refer to Figure 4 , which is a flowchart of the method. In the following description, the method is applied to the network architecture shown in Figure 2 or Figure 3 . In addition, the method can be executed by two communication devices, for example, a first communication device and a second communication device. The first communication device can 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 can be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it can also be other communication devices, such as a chip system. The second communication device can 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 can be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it can also be other communication devices, such as a chip system. Moreover, the implementation of the first communication device and the second communication device is not limited, for example, the first communication device can be a network device, and the second communication device is a terminal device, or the first communication device is a network device, and the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, or the first communication device is a communication device capable of supporting the network device to implement the functions required by the method, and the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, and so on. The network device is, for example, a base station.

[0124] For ease of description, in the following, the method is taken as an example executed by a network device and a terminal device, that is, the first communication device is a network device and the second communication device is a terminal device. If the present embodiment is applied to the network architecture shown in Figure 3 , the network device described below can be the network device in the network architecture shown in Figure 3 , the terminal device described below can be the terminal device 1 or the terminal device 2 in the network architecture shown in Figure 3 , and if the present embodiment is applied to the network architecture shown in Figure 4 , the network device described below can be the network device in the network architecture shown in Figure 4The network device in the network architecture shown, the terminal device described below can be Figure 4 The terminal device in the network architecture shown. It should be noted that the embodiments of the present application are only taken as an example by the network device and the terminal device, and are not limited to this scenario, for example, it is also possible to execute through the terminal device and the terminal device, if this is the case, the network device in the following can be replaced by the first terminal device, the terminal device in the following can be replaced by the second terminal device, the first terminal device can be a terminal device supporting both wideband capability and narrowband capability, or a terminal device supporting narrowband capability, and the second terminal device can be a terminal device supporting both wideband capability and narrowband capability, or a terminal device supporting narrowband capability.

[0125] S401, the network device determines the first signal.

[0126] In the embodiments of the present application, the first signal includes one SSB. The SSB can include PSS, SSS and PBCH. It should be noted that PSS and SSS can be referred to as first SS and second SS respectively, and the embodiments of the present application do not limit the names.

[0127] 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 is spaced from the PSS by at least 2 symbols in the time domain.

[0128] To avoid that the SSB for the narrowband terminal device is blindly detected by the wideband terminal device or other terminal devices in the NR, for example, the scheme of setting the SSS on the third symbol, whether it is a wideband terminal device or a terminal device in other NR systems, can receive the PSS and the SSS, resulting in unnecessary blind detection of the wideband terminal device and the non-narrowband terminal device in other NR systems, wasting the resources of the terminal device. The present application proposes the following possible implementation manner to avoid that the SSB corresponding to the narrowband terminal device is blindly detected by the non-narrowband terminal device, so as to reduce the power consumption of the terminal device.

[0129] In a possible implementation manner, for different symbols in the time domain where each SSB in the SSB is located, the network device can be configured, or the protocol is specified and stored in the network device and the terminal device, and the specific implementation is not limited.

[0130] 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 Figure 5 As shown, the number of subcarriers occupied by the first signal can be 144 subcarriers, 72 subcarriers or 121 subcarriers, which is not limited here.

[0131] In the case that the frequency domain position occupied by the PBCH is set to be the same as the frequency domain position occupied by the PSS and the SSS, compared with the setting mode of the PBCH in the SSB with a wide frequency domain bandwidth in the prior art, the frequency domain bandwidth of the SSB is reduced. Therefore, in order to guarantee the coverage of the narrowband terminal device, in the embodiment of the present application, the performance loss caused by the reduction of the bandwidth can be compensated by expansion in the time domain. A possible implementation manner can set the symbol of the SSB to be 6 symbols, for example, Figure 5 As shown in the figure, one SSB includes 0-5 symbols. One symbol is used for the PSS, one symbol is used for the SSS, and 4 symbols are used for the PBCH.

[0132] Through the above method, it can be guaranteed 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 guarantee that the narrowband terminal device and the NR terminal device in the NR reach the same coverage.

[0133] In the embodiment of the present application, the number of subcarriers occupied by the first signal can be 144 subcarriers, 72 subcarriers or 121 subcarriers, which is not limited here. For a communication system including 12 subcarriers in one resource block RB, 144 subcarriers can also be referred to as 12 resource blocks RB. The PSS, the SSS and the PBCH of each OFDM symbol all occupy 12 RBs, and the PSS, the SSS and the PBCH signals all occupy 144 subcarriers in the frequency domain. The first signal can occupy 6 symbols, which are described in the order of small to large, and the 6 symbols can be the first symbol, the second symbol, the third symbol, the fourth symbol, the fifth symbol and the sixth symbol.

[0134] As an implementation manner of the SSB, for example, refer to Figure 5 is a schematic diagram of one SSB. The SSS and the PSS are spaced apart by 2 symbols in the time domain. Described in the order of small to large, 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, the third symbol, the fifth symbol and the sixth symbol in the time domain. For example, the SSB occupies 6 OFDM symbols #0-#5 in the time domain. The #0 symbol is the PSS signal, the #3 symbol is the SSS signal, and the #1#2#4#5 symbols are the PBCH signals.

[0135] It can be understood that, in the embodiments of the present application, X1 is located in the X2th symbol in the time domain, which can also be referred to as X1 being carried to the X2th symbol. For example, X1 can be PSS, SSS, and PBCH. X2 can be the first symbol, the second symbol, the third symbol, and the fourth symbol, etc. For example, PSS is located in the first symbol in the time domain, which can also be referred to as PSS being carried in the first symbol; SSS is located in the fourth symbol in the time domain, which can also be referred to as SSS being carried in the fourth symbol; PBCH is located in the second symbol in the time domain, which can also be referred to as PBCH being carried in the second symbol, etc.

[0136] Through the method, the configuration of the PBCH can be made more uniform, so that the overall peak-to-average ratio of the SSB signal can be set more evenly. The requirements of the terminal device for detecting the SSB can be reduced, and the applicability of the SSB can be improved.

[0137] As an implementation manner of an SSB, for example, refer to Figure 6 is a schematic of an SSB. In the order of symbols from small to large, 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.

[0138] As an implementation manner of an SSB, for example, refer to Figure 7 is a schematic of an SSB. The SSS is spaced apart 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, third, fourth, and sixth symbols in the time domain. For example, the SSB occupies 6 OFDM symbols #0~#5 in the time domain. The #0 symbol is a PSS signal, the #4 symbol is an SSS signal, and the #1, #2, #3, and #5 symbols are PBCH signals.

[0139] Through the above method, the narrowband SSB occupies more OFDM symbols in the time domain, and through the expansion in the time domain, the performance loss caused by the reduction of the bandwidth is compensated, so that the NR low-cost Internet of Things terminal UE and the NR UE can achieve the same coverage. In addition, compared with the prior art scheme of setting the SSS on the third symbol, the scheme in the embodiments of the present application can reduce the false detection of the SSS by the non-narrowband terminal device, thereby reducing the power consumption of the non-narrowband terminal device.

[0140] When the terminal device performs initial access, the terminal device completely performs blind detection when detecting the PSS, and the terminal device does not know the position of the PSS and completely realizes detection through blind detection. Considering that in the above scheme, the non-narrowband terminal device can determine that the SSB is the SSB corresponding to the narrowband terminal device only after failing to detect the SSB, 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.

[0141] In the embodiments of the present application, a sequence generation method of a PSS signal is further provided, in which a shift value is additionally added in the PSS sequence to distinguish the PSS signal in the SSB in NR. Thus, the NR terminal device can not blindly detect the narrowband PSS in the embodiments of the present application when blindly detecting the PSS. 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 the NR non-narrowband terminal device and reducing the power consumption of the NR non-narrowband terminal device.

[0142] In a possible implementation, the sequence (first sequence) of the PSS signal can be an m sequence. The following is an example of the m sequence. When the PSS signal is another sequence, the implementation can be referred to, and details are not described herein.

[0143] For example, the sequence d k (n) of the PSS signal satisfies:

[0144] d k (n)=1-2x(m)

[0145] wherein the cyclic shift sequence x(i) satisfies:

[0146] x(i+7)=(x(i+4)+x(i))mod2

[0147] The initial value of x(i) satisfies:

[0148] [x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0]

[0149] In the embodiments of the present application, m satisfies:

[0150]

[0151] 0≤n<127

[0152] wherein n is a positive integer less than 127; the first shift value K is a positive integer less than 43, and K can be a prime number. The second shift value in the sequence d is used to represent the index number of the PSS, and the value range is {0, 1, 2}. The terminal device can determine the SSB block index (block index) by the different PSS sequences and SSS sequences and the index (index) transmitted in the PBCH, to identify different SSBs.

[0153] It should be noted that the value of K can be determined by the network device or specified by a protocol.

[0154] By the above method, the PSS signal in the narrowband SSB and the PSS signal in the NR system SSB are distinguished, the PSS signal in the narrowband SSB sent by the network is avoided from being accessed by mistake by the NR terminal, and unnecessary power consumption caused by mistaken detection of the NR terminal is avoided.

[0155] S402, the network device sends a first signal.

[0156] Correspondingly, the narrowband terminal device receives the first signal from the network device.

[0157] 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 initial access, the terminal device does not know the position of the SSB, so the terminal device will perform blind detection on the SSB; or for the terminal device in the connected state, the position of the SSB is generally known, so direct detection can be performed, that is, direct reception. Therefore, in the embodiment of the present application, the terminal device "receives" and the terminal device "detects" can be considered as the same process, that is, "reception" is also "detection".

[0158] Then, the terminal device detects the SSB, which can have two results:

[0159] 1. detecting (that is, receiving) the SSB;

[0160] 2. not detecting (that is, not receiving) the SSB.

[0161] The two results are in an "or" relationship.

[0162] In the embodiment of the present application, before or at the same time as the terminal device receives an SSB, the terminal device needs to obtain the SSB time-frequency structure, including but not limited to the following three ways:

[0163] The first way is that the SSB time domain structure is a standard predefinition, 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 pre-configured or stored in the terminal device;

[0164] In a second manner, the terminal device receives first signaling indicating an SSB time-frequency structure. The first signaling is, for example, sent by the network device, and the terminal device can determine the SSB time-frequency 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 the at least one SSB time-frequency structure introduced in the embodiments of the present application. The first signaling is, for example, high-layer signaling, such as radio resource control (RRC) signaling or a media access control control element (MAC CE), or the like; or the first signaling is, for example, physical-layer signaling, such as downlink control information (DCI), or the like. The implementation of the first signaling is not limited.

[0165] In a third manner, the terminal device can directly obtain the SSB time-frequency structure according to the narrowband capability. For example, a terminal device can access the system according to the wideband capability or according to the narrowband capability. If the terminal device is in a deep coverage or super-remote coverage scenario, the terminal device can select to obtain the SSB time-frequency structure according to the narrowband capability to improve the efficiency of the terminal device accessing the system. For example, a terminal device that supports a bandwidth greater than or equal to 5 MHz is considered a wideband terminal device, and a terminal device that supports a bandwidth greater than or equal to 5 MHz can obtain the SSB time-frequency structure according to the narrowband capability.

[0166] The terminal device receives a first signal (SSB) occupying a bandwidth equal to 12 RBs in the frequency domain, where one RB occupies 12 subcarriers in the frequency domain. Therefore, the narrowband terminal device (with a maximum bandwidth capability equal to 12 RBs) can normally receive the SSB.

[0167] S403, the terminal device performs time-frequency synchronization and / or acquires system messages according to the received first signal.

[0168] Specifically, the terminal device can synchronize with the network device according to at least one SSB, or acquire system messages according to at least one SSB, or synchronize with the network device and acquire system messages according to at least one SSB.

[0169] For example, when the SSB includes the PSS, the SSS, and the PBCH, the terminal device can first detect the PSS, then detect the SSS to obtain time-frequency synchronization and / or the identity number (ID) of the physical cell, and finally detect the PBCH to obtain system messages. Subsequently, the terminal device can perform data transmission with the network device based on the time-frequency synchronization and the system messages.

[0170] As described above, there can be multiple services, multiple scenarios, and multiple bandwidth-capable terminal devices in the system. Therefore, URLLC, eMBB, and mMTC services can exist on one carrier, and one carrier can be used for narrowband terminal devices and wideband terminal devices to transmit data. The SSB provided in the embodiments of the present application provides convenience for narrowband terminal device services and avoids the misaccess of other NR non-narrowband terminal devices.

[0171] The device used to implement the above method in the embodiments of the present application will be described below with reference to the accompanying drawings. Therefore, the content in the foregoing can be used in the subsequent embodiments, and the repeated content will not be described again.

[0172] Figure 8 A schematic block diagram of the first communication device 800 provided in the embodiments of the present application is shown.

[0173] The first communication device 800 includes a processing module 810 and a transceiver module 820. Exemplarily, the first communication device 800 can be a vehicle-mounted device, or a chip applied to the vehicle-mounted device or other combined devices, components, etc. having the functions of the vehicle-mounted device. When the first communication device 800 is a vehicle-mounted device, the transceiver module 820 can be a transceiver, which can include an antenna and a radio frequency circuit, etc., and the processing module 810 can be a processor, for example, a baseband processor, which can include one or more central processing units (CPUs). When the first communication device 800 is a component having the functions of the vehicle-mounted device, the transceiver module 820 can be a radio frequency unit, and the processing module 810 can be a processor, for example, a baseband processor. When the first communication device 800 is a chip system, the transceiver module 820 can be an input / output interface of a chip (for example, a baseband chip), and the processing module 810 can be a processor of the chip system, which can include one or more central processing units. It should be understood that the processing module 810 in the embodiments of the present application can be implemented by a processor or a processor-related circuit component, and the transceiver module 820 can be implemented by a transceiver or a transceiver-related circuit component.

[0174] For example, the processing module 810 can be configured to perform Figure 4 All operations performed by the network device in the embodiments shown in addition to the transceiving operations, for example, step 201, step 203, step 501, step 503, for example, encoding the first data, encoding the second data, and / or other processes for supporting the technologies described herein. The transceiver module 820 can be configured to perform Figure 4 All transceiving operations performed by the network device in the embodiments shown in addition to the transceiving operations, and / or other processes for supporting the technologies described herein.

[0175] In addition, the transceiver module 820 can be a functional module that can complete both sending operations and receiving operations. For example, the transceiver module 820 can be configured to perform Figure 4 In the embodiments shown, all the sending operations and receiving operations performed by the network device, 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, and the transceiver module 820 can be considered as a general term of the two functional modules, and the two functional modules are a sending module and a receiving module respectively, the sending module is configured to complete a sending operation, for example, the sending module can be configured to perform Figure 4 In any of the embodiments shown, all the sending operations performed by the network device, the receiving module is configured to complete a receiving operation, for example, the receiving module can be configured to perform Figure 4 In the embodiments shown, all the receiving operations performed by the network device.

[0176] The processing module 810 is configured to determine a first signal; the first signal includes a PSS, an SSS, and a PBCH; the PSS, the SSS, and the PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS, or the SSS is spaced apart from the PSS by at least 2 symbols in the time domain; and the transceiver module 820 is configured to send the first signal.

[0177] In a possible implementation, the first signal includes 6 symbols in the time domain.

[0178] In a possible implementation, 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.

[0179] In a possible implementation, 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, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

[0180] In a possible implementation, 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 sixth symbol in the time domain.

[0181] In a possible implementation, a sequence of the PSS is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; the first shift value is a positive integer less than 43; and the second shift value is determined according to a number of the PSS, the number of the PSS being used to determine a cell identity.

[0182] In a possible implementation, a sequence of the PSS is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; the first shift value is a positive integer less than 43; and the second shift value is determined according to a number of the PSS, the number of the PSS being used to determine a cell identity. k (n) satisfies:

[0183] d k (n) = 1-2x(m)

[0184]

[0185] wherein x(m) is the first sequence; mod represents a modulo operation; n is a positive integer less than 127; K is the first shift value; and m is the second shift value. The value range of m is {0, 1, 2}, and m represents a number of the PSS. The second shift value is determined according to the number of the PSS.

[0186] In a possible implementation, the PBCH occupies the same frequency domain position as the PSS and the SSS, or the PBCH occupies a frequency domain position including the frequency domain position occupied by the PSS and the SSS.

[0187] In a possible implementation, the number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.

[0188] When the communication apparatus is a chip-type apparatus or circuit, the apparatus can include a transceiver module and a processing module. The transceiver module can be an input-output circuit and / or a communication interface, and the processing module can be an integrated processor or microprocessor or integrated circuit.

[0189] For other functions that can be implemented by the first communication apparatus 800, refer to related descriptions of the embodiments shown in Figure 4 For brevity, no further description is given.

[0190] Figure 9 A schematic block diagram of a second communication apparatus 900 provided in embodiments of the present application is shown in FIG. 8.

[0191] ​The second communication apparatus 900 includes a processing module 910 and a transceiver module 920. Exemplarily, the second communication apparatus 900 can be a narrowband terminal device, or a chip applied in the narrowband terminal device, or another combination device, component or the like having the functions of the narrowband terminal device. When the second communication apparatus 900 is the narrowband terminal device, the transceiver module 920 can be a transceiver, which can include an antenna and a radio frequency circuit and the like, and the processing module 910 can be a processor, for example, a baseband processor, which can include one or more CPUs. When the second communication apparatus 900 is a component having the functions of the narrowband terminal device, the transceiver module 920 can be a radio frequency unit, and the processing module 910 can be a processor, for example, a baseband processor. When the second communication apparatus 900 is a chip system, the transceiver module 920 can be an input / output interface of a chip (for example, a baseband chip), and the processing module 910 can be a processor of the chip system, which can include one or more central processing units. It should be understood that the processing module 910 in the embodiments of the present application can be implemented by a processor or a processor-related circuit component, and the transceiver module 920 can be implemented by a transceiver or a transceiver-related circuit component.

[0192] For example, the processing module 910 can be configured to perform all operations performed by the narrowband terminal device in the embodiments shown in the figures, other than the transceiving operations, and / or other processes for supporting the techniques described herein. Figure 4 For example, the processing module 910 can be configured to perform all operations performed by the narrowband terminal device in the embodiments shown in the figures, other than the transceiving operations, and / or other processes for supporting the techniques described herein. Figure 4 For example, the processing module 910 can be configured to perform all operations performed by the narrowband terminal device in the embodiments shown in the figures, other than the transceiving operations, and / or other processes for supporting the techniques described herein.

[0193] In addition, for the implementation of the transceiver module 920, reference can be made to the description of the implementation of the transceiver module 820.

[0194] The processing module 910 is configured to determine a first signal, wherein the first signal includes a PSS, an SSS and a PBCH; the PSS, the SSS and the PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS, or the SSS is spaced apart from the PSS by at least 2 symbols in the time domain; and the first signal is transmitted by the transceiver module 920.

[0195] In a possible implementation, the first signal includes 6 symbols in the time domain.

[0196] In a possible implementation, 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.

[0197] In a possible implementation, the PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

[0198] In a possible implementation, the PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

[0199] In a possible implementation, the method further includes:

[0200] The sequence of the PSS is generated according to a first sequence; the first sequence includes a first shift value and a second shift value.

[0201] The first shift value is a positive integer less than 43; and the second shift value is determined according to a number of the PSS, and the number of the PSS is used to determine a cell identity.

[0202] In a possible implementation, a sequence d k (n) satisfies:

[0203] d k (n) = 1-2x(m)

[0204]

[0205] wherein x(m) is a first sequence; mod represents a modulo operation; n is a positive integer less than 127; and K represents a first shift value. The value range of K is {0, 1, 2}, and K represents a number of the PSS; and the second shift value is determined according to the number of the PSS.

[0206] In a possible implementation, the PBCH occupies the same frequency domain position as the PSS and the SSS, or the PBCH occupies a frequency domain position including the frequency domain position occupied by the PSS and the SSS.

[0207] In a possible implementation, the PBCH occupies a number of subcarriers in the frequency domain, and the number of subcarriers is at least one of 144, 72, or 121.

[0208] For other functions that can be implemented by the second communication device 900, refer to the related descriptions of the embodiments shown in Figure 4 , and details are not described herein.

[0209] ​The embodiment of the present application further provides a communication device, which can be a network device or a circuit. The communication device can be used to perform the actions performed by the network device in the method embodiments.

[0210] Based on the same concept as the communication method, as shown in Figure 10 The 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 method embodiments, and can be a network device, a terminal device, a vehicle-mounted device, or can be located in the network device, the terminal device or the vehicle-mounted device, and can be a sending device or a receiving device.

[0211] The communication device 1000 includes one or more processors 1001. The processor 1001 can be a general-purpose processor or a special-purpose processor. For example, it can 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 the communication device (such as a network device, a terminal device, a vehicle-mounted device or a chip), execute a software program, and process data of the software program. The communication device 1000 can include a transceiver unit to realize input (reception) and output (transmission) of signals. For example, the transceiver unit can be a transceiver, a radio frequency chip, etc.

[0212] The communication device 1000 includes one or more processors 1001, which can implement the method performed by the network device in the embodiments shown above.

[0213] Optionally, the processor 1001 can implement other functions in addition to the method in the embodiments shown above. Optionally, in an implementation, the processor 1001 can execute a computer program to enable the communication device 1000 to perform the method performed by the network device in the method embodiments. The computer program can be stored in the processor 1001 in whole or in part, such as a computer program 1003, or can be stored in a memory 1002 coupled to the processor 1001 in whole or in part, such as a computer program 1104, or can be enabled by the computer programs 1003 and 1004 together to enable the communication device 1000 to perform the method performed by the network device in the method embodiments.

[0214] For example, the processor 1001 is configured to determine a first signal; wherein the first signal includes a PSS, a SSS and a PBCH; the PSS, the SSS and the PBCH are located in different symbols in the time domain; the SSS is adjacent to the PSS, or the SSS is spaced apart from the PSS by at least 2 symbols in the time domain; and the transceiver unit 1005 is configured to transmit the first signal.

[0215] In yet another possible implementation, the communication apparatus 1000 can also include circuitry that can implement the functions performed by the network device in the foregoing method embodiments.

[0216] In yet another possible implementation, one or more memories 1002 can be included in the communication apparatus 1000, on which a computer program 1004 is stored, which can be run on the processor, so that the communication apparatus 1000 performs the communication method described in the foregoing method embodiments. Optionally, data can also be stored in the memory. Optionally, the computer program and / or the data can also be stored in the processor. For example, the one or more memories 1002 described above can store the association or correspondence described in the foregoing embodiments, or the related parameters or tables involved in the foregoing embodiments, and the like. The processor and the memory can be separately arranged, or can be integrated or coupled together.

[0217] In yet another possible implementation, the communication apparatus 1000 can also include a transceiver 1005. The processor 1001 can be referred to as a processing unit, which controls the communication apparatus (the first communication apparatus or the second communication apparatus). The transceiver 1005 can be referred to as a transceiver, a transceiving circuit, or a transceiver, which is used to implement the transceiving of data or control signaling.

[0218] For example, if the communication apparatus 1000 is a chip or other combination device, component, etc. applied to a communication device and having the functions of the communication device described above, the transceiver 1005 can be included in the communication apparatus 1000.

[0219] In yet another possible implementation, the communication apparatus 1000 can also include a transceiver 1005 and an antenna 1006. The processor 1001 can be referred to as a processing unit, which controls the first communication apparatus. The transceiver 1005 can be referred to as a transceiver, a transceiving circuit, or a transceiver, which is used to implement the transceiving function of the apparatus through the antenna 1006.

[0220] Based on the same idea as the communication method described above, as shown in Figure 11 The embodiments of the present application also provide a second communication apparatus 1100. The second communication apparatus 1100 can be used to implement the method performed by the narrowband terminal device in the foregoing method embodiments, which can be referred to the description in the foregoing method embodiments. The second communication apparatus 1100 can be the narrowband terminal device, or can be located in the narrowband terminal device, and can be a sender device or a receiver device.

[0221] The second communication apparatus 1100 comprises one or more processors 1101. The processor 1101 can be a general purpose processor or a special purpose processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, the central processing unit can be used to control the communication apparatus (e.g., a network device, a terminal device, a vehicle-mounted device or a chip, etc.), execute a software program, and process data of the software program. The second communication apparatus 1100 can comprise a transceiver unit to realize input (reception) and output (transmission) of signals. For example, the transceiver unit can be a transceiver, a radio frequency chip, etc.

[0222] The second communication apparatus 1100 comprises one or more processors 1101, which can implement the method performed by the narrowband terminal device in the above-mentioned embodiments.

[0223] For example, the processor 1101 is configured to receive a first signal through the transceiver unit 1105; wherein the first signal comprises a PSS, a SSS and a PBCH; 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 is spaced apart from the PSS by at least 2 symbols in the time domain; and the processor 1101 is configured to perform time-frequency synchronization and / or acquire system messages according to the received first signal.

[0224] Optionally, the processor 1101 can implement other functions in addition to the above-mentioned embodiments. Optionally, in an implementation manner, the processor 1101 can execute a computer program, so that the second communication apparatus 1100 performs the method performed by the narrowband terminal device in the above-mentioned method embodiments. The computer program can be stored in the processor 1101 in whole or in part, such as a computer program 1103, or can be stored in the memory 1102 coupled to the processor 1101 in whole or in part, such as a computer program 1104, or can be stored in the computer programs 1103 and 1104 together to make the second communication apparatus 1100 perform the method performed by the narrowband terminal device in the above-mentioned method embodiments.

[0225] In another possible implementation manner, the second communication apparatus 1100 can also comprise a circuit, which can implement the functions of the narrowband terminal device in the above-mentioned method embodiments.

[0226] In yet another possible implementation, the second communication apparatus 1100 can comprise one or more memories 1102 storing computer programs 1104 which are run on the processor, so that the second communication apparatus 1100 performs the communication method described in the above method embodiment. Optionally, the memories can also store data. Optionally, the processor can also store computer programs and / or data. For example, the one or more memories 1102 can store the association or correspondence described in the above embodiments, or the related parameters or tables involved in the above embodiments, etc. The processor and the memories can be separately arranged, or can be integrated or coupled together.

[0227] In yet another possible implementation, the second communication apparatus 1100 can further comprise a transceiver 1105. The processor 1101 can be referred to as a processing unit, and controls the second communication apparatus. The transceiver 1105 can be referred to as a transceiver, a transceiving circuit, or a transceiver, etc., and is used to realize the transceiving of data or control signaling.

[0228] For example, if the second communication apparatus 1100 is a chip or other combination device, component, etc. applied to a communication device and having the functions of the above communication device, the second communication apparatus 1100 can comprise the transceiver 1105.

[0229] In yet another possible implementation, the second communication apparatus 1100 can further comprise a transceiver 1105 and an antenna 1106. The processor 1101 can be referred to as a processing unit, and controls the second communication apparatus. The transceiver 1105 can be referred to as a transceiver, a transceiving circuit, or a transceiver, etc., and is used to realize the transceiving function of the apparatus through the antenna 1106.

[0230] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with a signal processing capability. In the implementation process, each step of the method embodiments described above can be completed by an integrated logic circuit or a computer program in the form of software in the processor. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logic block diagram disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The method steps disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or be executed by a combination of hardware and software modules in the code processor. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0231] It is to be appreciated that the memory in the embodiments of the application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Where the nonvolatile memory is, for example, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically EPROM (EEPROM), or flash memory. The volatile memory can be, for example, random access memory (RAM), which is used as external cache. By way of example, and not limitation, many forms of RAM are available, for example, static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DR RAM). Note that the system and method described herein are intended to include all such memory types and any other suitable type of memory.

[0232] The embodiments of the present application further provide a computer readable storage medium, having stored thereon a computer program, which, when executed by a computer, implements the method described in any of the above method embodiments applied to a network device or a narrowband terminal device.

[0233] The embodiments of the present application further provide a computer program product, which, when executed by a computer, implements the method described in any of the above method embodiments applied to a network device or a narrowband terminal device.

[0234] In the above embodiments, the implementation can be wholly or partially achieved by software, hardware, firmware, or any combination thereof. When implemented by software, the implementation can be wholly or partially in the form of a computer program product. The computer program product includes one or more computer programs. When the computer programs are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer programs can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer programs can be transferred from one website, computer, server, or data center to another website, computer, server, or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. containing one or more available media. The available media can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, high-density digital video disc (DVD)), or a semiconductor medium (for example, solid state disk (SSD)), etc.

[0235] The embodiments of the present application also provide a communication device, including a processor and an interface; the processor is configured to execute the method described in any of the above method embodiments applied to the network device or the narrowband terminal device.

[0236] It should be understood that the above processing device can be a chip, and the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented by software, the processor can be a general-purpose processor, which is implemented by reading software codes stored in a memory. The memory can be integrated in the processor or exist independently outside the processor.

[0237] The embodiments of the present application provide a communication system. The communication system can include the network device or the narrowband terminal device described above. Figure 4 The embodiments described above relate to the network device or the narrowband terminal device.

[0238] The embodiments of the present application also provide a computer-readable storage medium, which stores a computer program. When the computer program is executed by a computer, the computer can implement the processes or functions related to the network device or the narrowband terminal device described in the above embodiments. Figure 4 The embodiments described above relate to the network device or the narrowband terminal device.

[0239] The embodiment of the present application further provides a computer program product for storing a computer program, which, when executed by a computer, can realize the method provided by the above-mentioned method embodiment Figure 4 The embodiment shown in the figure is related to the network device and the narrowband terminal device.

[0240] It should be understood that the processor mentioned in the embodiment of the present application can be a CPU, and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0241] It should also be understood that the memory mentioned in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0242] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0243] It should be noted that the memory described herein is intended to include, but not limited to, these and any other suitable type of memory.

[0244] It should be understood that the size of the sequence number of the above-mentioned processes does not mean the order of execution in various embodiments of the present application, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0245] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0246] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-mentioned system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0247] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0248] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0249] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0250] The functions, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to 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 can be any available medium that can be accessed by a computer. For example, but not limited to: the computer readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk, mobile hard disk, or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0251] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the embodiments of the present application, which should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: Determine a first signal, where the first signal includes 6 symbols in the time domain; The first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, the PSS occupies 1 symbol, the SSS occupies 1 symbol, and the PBCH occupies 4 symbols; The PSS, the SSS, 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; The first signal is sent.

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

3. The method according to claim 1, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

4. The method according to claim 1, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: The PSS sequence is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; 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 the cell identifier.

6. The method according to claim 5, wherein The sequence d of the PSS k (n) Satisfy: 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; K represents a first shift value; The value range of is {0,1,2}, Indicates the number of PSS; the second shift value is based on the Sure.

7. The method according to claim 1, wherein 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 positions occupied by the PSS and the SSS.

8. The method according to claim 1, wherein The number of subcarriers occupied by the PBCH in the frequency domain is at least one of the following: 144, 72, or 121.

9. A communication method, characterized in that: include: receiving a first signal, where the first signal includes 6 symbols in the time domain; The first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, the PSS occupies 1 symbol, the SSS occupies 1 symbol, and the PBCH occupies 4 symbols; 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; Perform time-frequency synchronization and / or obtain system information according to the received first signal.

10. The method according to claim 9, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the second symbol in the time domain, and the PBCH is located at the third to sixth symbols in the time domain.

11. The method according to claim 9, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

12. The method according to claim 9, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

13. The method according to any one of claims 9 to 12, wherein: The method further comprises: The PSS sequence is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; 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 the cell identifier.

14. The method according to claim 13, wherein The sequence d of the PSS k (n) Satisfy: 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; K is the first shift value; The value range of is {0,1,2}, Indicates the number of PSS; the second shift value is according to the Sure.

15. The method according to claim 9, wherein The frequency domain position occupied by the PBCH is the same as the frequency domain positions occupied by the PSS and the SSS; or The frequency domain position occupied by the PBCH includes the frequency domain positions occupied by the PSS and the SSS.

16. The method according to claim 9, wherein The number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.

17. A communication device, characterized in that: Includes a processing module and a transceiver module; The processing module is configured to determine a first signal, where the first signal includes six symbols in the time domain; wherein the first signal includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH), the PSS occupies one symbol, the SSS occupies one symbol, and the PBCH occupies four symbols; the PSS, the SSS, 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 two symbols in the time domain; The transceiver module is used to send the first signal.

18. The device according to claim 17, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the second symbol in the time domain, and the PBCH is located at the third to sixth symbols in the time domain.

19. The device according to claim 17, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

20. The device according to claim 17, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

21. The device according to any one of claims 17 to 20, characterized in that The PSS sequence is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; 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 the cell identifier.

22. The device according to claim 21, wherein The sequence d of the PSS k (n) Satisfy: 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; K represents a first shift value; The value range of is {0,1,2}, Indicates the number of PSS; the second shift value is based on the Sure.

23. The device according to claim 17, wherein 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 positions occupied by the PSS and the SSS.

24. The device according to claim 17, wherein The number of subcarriers occupied by the PBCH in the frequency domain is at least one of the following: 144, 72, or 121.

25. A communication device, characterized in that: Includes a processing module and a transceiver module; The transceiver module is configured to receive a first signal, where the first signal includes 6 symbols in the time domain; wherein the first signal includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, the PSS occupies 1 symbol, the SSS occupies 1 symbol, and the PBCH occupies 4 symbols; 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 is separated from the PSS by at least 2 symbols in the time domain; The processing module is configured to perform time-frequency synchronization and / or obtain system information according to the received first signal.

26. The device according to claim 25, characterized in that The PSS is located at the first symbol in the time domain, the SSS is located at the second symbol in the time domain, and the PBCH is located at the third to sixth symbols in the time domain.

27. The device according to claim 25, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fourth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fifth symbol, and the sixth symbol in the time domain.

28. The device according to claim 25, wherein The PSS is located at the first symbol in the time domain, the SSS is located at the fifth symbol in the time domain, and the PBCH is located at the second symbol, the third symbol, the fourth symbol, and the sixth symbol in the time domain.

29. The device according to any one of claims 25 to 28, characterized in that The PSS sequence is generated according to a first sequence; the first sequence includes a first shift value and a second shift value; 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 the cell identifier.

30. The device according to claim 29, wherein The sequence d of the PSS k (n) Satisfy: 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; K is the first shift value; The value range of is {0,1,2}, Indicates the number of PSS; the second shift value is according to the Sure.

31. The device according to claim 25, wherein The frequency domain position occupied by the PBCH is the same as the frequency domain positions occupied by the PSS and the SSS; or The frequency domain position occupied by the PBCH includes the frequency domain positions occupied by the PSS and the SSS.

32. The device according to claim 25, wherein The number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.

33. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store a computer program. When the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 8, or the computer is caused to execute the method according to any one of claims 9 to 16.

34. A computer program product, characterized in that The method comprises computer program instructions, which, when executed on a processor, cause the method according to any one of claims 1 to 16 to be performed.

35. A communication system, characterized in that: comprising the communication device as claimed in claim 17, and comprising the communication device as claimed in claim 25.

36. A chip, characterized in that: The method comprises a processor and a communication interface, wherein the processor is configured to read instructions through the communication interface to execute the method according to any one of claims 1 to 8, or execute the method according to any one of claims 9 to 16.

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