WO2022067703A1

WO2022067703A1 - Communication method and apparatus

Info

Publication number: WO2022067703A1
Application number: PCT/CN2020/119497
Authority: WO
Inventors: 曲韦霖; 罗之虎; 金哲
Original assignee: 华为技术有限公司
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-07
Also published as: CN116406498A

Abstract

The present application discloses a communication method and apparatus. 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 a time domain, and the SSS is either adjacent to the PSS or is separated from the PSS by at least two symbols in the time domain; and sending the first signal.

Description

A communication method and device

technical field

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

Background technique

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

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

SUMMARY OF THE INVENTION

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

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

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

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

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

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

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

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

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

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

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

The PSS signal in the SSB in the NR is distinguished by adding a first shift value to the PSS sequence. Therefore, when the NR terminal device blindly detects the PSS, it can blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of the NR non-narrowband terminal device and reducing the power consumption of the NR non-narrowband terminal device. .

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

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

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

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

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

Sure.

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

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

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

In a second aspect, the present application provides a communication method, which can be performed by a second communication device. The second communication device may 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. Exemplarily, when the communication method is applied to a vehicle, the first communication device may be an in-vehicle device, or a chip provided in the in-vehicle device for realizing the functions of the in-vehicle device, or a chip for realizing the in-vehicle device. other parts of the function. It may also be a narrowband terminal device, or a chip provided in the narrowband terminal device for implementing the function of the narrowband terminal device, or other components for implementing the function of the narrowband terminal device.

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

Through the above method, the narrowband terminal device can be made to determine the first signal based on the SSS in the first signal being adjacent to the PSS in the time domain, or the SSS and the PSS being separated by at least 2 symbols in the time domain. The signal is an SSB signal corresponding to the narrowband terminal device, and further, time-frequency synchronization and/or system information is acquired through the first signal. To avoid mis-access between broadband terminal equipment and non-narrowband terminal equipment in other NR systems caused by other non-narrowband terminal equipment in NR detecting the SSS of the first signal.

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

Through the above method, the first signal occupies more OFDM symbols in the time domain, and the expansion in the time domain ensures that the narrowband terminal equipment in NR and the NR terminal equipment achieve the same coverage, while avoiding the NR terminal equipment on the first signal. False access can reduce the false detection of the SSS by the NR non-narrowband terminal equipment, thereby reducing the power consumption of the non-narrowband terminal equipment.

By adding an additional shift value to 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, it can blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of the NR non-narrowband terminal device and reducing the power consumption of the NR non-narrowband terminal device. .

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

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

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

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

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

definite.

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

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

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

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

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

A transceiver module, configured to send the first signal.

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

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

a transceiver module for receiving a first signal; wherein the first signal includes PSS, SSS and PBCH; the PSS, the SSS and the PBCH are located in different symbols in the time domain; the SSS and the The PSS is adjacent in the time domain, or the SSS and the PSS are separated by at least 2 symbols in the time domain;

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

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

Wherein, if the first communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codecs, etc. are implemented. Alternatively, if the first communication device is a chip provided in the communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.

In a sixth aspect, a communication device is provided, and the communication device is, for example, the aforementioned second communication device. The communication apparatus includes a processor and a communication interface (or, interface circuit), which may be used to communicate with other apparatuses or devices. Optionally, a memory may also be included for storing computer instructions. The processor and the memory are coupled to each other for implementing the method described in the second aspect or various possible implementation manners. Alternatively, the second communication device may not include the memory, and the memory may be located outside the second communication device. The processor, the memory and the communication interface are coupled to each other, and are used for implementing the method described in the second aspect or various possible implementation manners. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to perform the method in the second aspect or any one of the possible implementation manners. Exemplarily, the second communication apparatus is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a narrowband terminal device, or a vehicle-mounted device or the like. For example, the second communication apparatus may be a narrowband terminal device, or may be a chip or other components provided in the narrowband terminal device.

Wherein, if the second communication device is a communication device, the communication interface is realized by, for example, a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codecs, etc. are implemented. Alternatively, if the second communication device is a chip set in the communication device, the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.

In a seventh aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled to the communication interface, and is used for implementing the method provided in the first aspect or any of the optional implementation manners. .

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

In an eighth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled to the communication interface, and is used for implementing the method provided in the second aspect or any of the optional implementation manners. .

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

In a ninth aspect, a communication system is provided, the communication system comprising the communication device of the third aspect, the communication device of the fifth aspect, or the communication device of the seventh aspect, and the communication device of the fourth aspect A device, the communication device of the sixth aspect, or the communication device of the eighth aspect.

In a tenth aspect, a computer-readable storage medium is provided, where the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer is made to execute the first aspect or any one of the above The method described in the possible embodiments.

In an eleventh aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program is run on a computer, the computer is made to execute the second aspect or any one of the above method described in a possible embodiment.

A twelfth aspect provides a computer program product comprising instructions, the computer program product is used to store a computer program, and when the computer program is run on a computer, the computer is made to execute any one of the above-mentioned first aspect or method described in a possible embodiment.

A thirteenth aspect provides a computer program product containing instructions, the computer program product is used to store a computer program, and when the computer program is run on a computer, the computer is made to execute any one of the above-mentioned second aspect or method described in a possible embodiment.

Description of drawings

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

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

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

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

5 to 7 are schematic diagrams of SSB designs provided by embodiments of the present application;

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

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

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

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

Detailed ways

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

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

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

Hereinafter, some terms in the embodiments of the present application will be explained, so as to facilitate the understanding of those skilled in the art.

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

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

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

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

The embodiments of the present application may involve two types of terminal equipment: broadband terminal equipment and narrowband terminal equipment. Among them, the conditions that broadband terminal equipment and narrowband terminal equipment need to meet include but are not limited to the following:

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

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

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

(3) In the embodiments of the present application, the narrowband terminal equipment may also be considered to need to maintain normal data communication with the network equipment through the coverage enhancement (CE) technology, while the broadband terminal equipment can communicate with the network even if it does not use the CE technology. The device maintains normal data communication. CE technologies include but are not limited to technologies such as data repeated transmission or power boosting. Or, if both the broadband terminal device and the narrowband terminal device need to transmit data repeatedly and maintain normal data communication with the network device in some scenarios, then the narrowband terminal device maintains data communication with the network device, the maximum number of repetitions required , which is smaller than the maximum number of repetitions required by the broadband terminal device to maintain data communication with the network device.

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

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

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

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

A carrier in an LTE system or an NR system can have multiple cells working on the same frequency at the same time. In some special scenarios, it can be considered that the concept of a carrier and a cell are equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a 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. In this case, it can be considered that the concept of a carrier and a cell are equivalent, for example, it is equivalent for a terminal device to access a carrier and access a cell. There are similar instructions for dual connectivity (DC) scenarios. In this embodiment of the present application, the concept of a cell will be introduced. In an NR system, if there is only one activated bandwidth part (BWP) on a cell or a carrier, the concept of a cell and a BWP can also be considered equivalent.

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

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

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

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

Time slots can have different time slot types, and different time slot types include different numbers of symbols. For example, a mini slot (mini slot) contains less than 7 symbols, 2 symbols, 3 symbols, 4 symbols, etc., A normal time slot (slot) contains 7 symbols or 14 symbols or the like. Depending on the subcarrier spacing, the length of each symbol can be different, and therefore the slot length can be different.

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

8) Sequence resources, also known as code domain resources, are related parameters used to indicate sequences. For random sequences, 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 low peak-to-average ratio sequences (such as ZC (zadoff–chu) sequences), the parameters of the sequence include root sequence, mask, scrambling code, cyclic shift (cyclic shift, CS) or orthogonal cover code (orthogonal cover code, OCC) and so on.

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

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

For example, the sequence of synchronization signals may be generated as follows:

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

where n=0,1,2,...; _rl () represents the sequence of synchronization signals; c(n) is a random sequence, for example, the random sequence is the Gold sequence of a 31-bit or 31-bit shift register, or the m sequence.

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

And, unless stated to the contrary, the ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or priority of multiple objects. Importance. For example, the first synchronization signal and the second synchronization signal are only for distinguishing different synchronization signals, and do not indicate differences in content, priority, transmission order, or importance of the two synchronization signals.

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

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

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

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

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

In the future, terminal devices will have multiple bandwidth capabilities, such as narrowband capabilities and broadband capabilities, and will also face more diverse application scenarios and business scenarios. Considering the bandwidth limitation of the narrowband IoT terminal, the bandwidth occupied by the PBCH signal in the SSB of the NR system is too large for the IoT devices connected to the narrowband, so that the SSB in the NR system does not meet the access requirements of the IoT devices and cannot be compatible with the narrowband IoT devices. The SSB of the NR system is connected to the NR system. For narrowband terminal equipment with a bandwidth of less than 20RB, it is impossible to detect the current SSB. Considering that the narrowband SSB is used as a public signal, the base station needs to send the SSB frequently (always). Therefore, it is necessary to minimize the influence on the energy saving mechanism caused by the transmission of the SSB by the existing base station. In view of this, the technical solutions of the embodiments of the present application are provided. The embodiment of the present application provides a new SSB, which is equivalent to that these signals can occupy multiple symbols in the time domain for transmission, and the embodiment of the present application limits the frequency domain range of the SSB to be the same as that of the PSS and the SSS, and the above 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 Make the SSB provided by the embodiment of the present application can not only meet the coverage performance requirements of the SSB of the narrowband terminal equipment, but also prevent other terminal equipment in the NR system from falsely detecting the SSB of the narrowband terminal equipment, improving the SSB for narrowband terminal equipment. While improving the performance, the pertinence of SSB is improved.

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

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

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

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

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

The terminal equipment in FIG. 2 may include two types of terminal equipment, namely the first type of terminal equipment and the second type of terminal equipment 2, both of which can be connected to the network equipment, and the first type of terminal equipment is used as the support Take the terminal equipment with broadband capability as an example, for example, the first type of terminal equipment can be an existing version 15 NR terminal equipment, and the second type of terminal equipment is an example of a terminal equipment that supports narrowband capabilities, such as a narrowband mMTC terminal in a future version equipment.

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

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

Please refer to FIG. 2 , which is another network architecture applied by the embodiment of the present application. The network architecture shown in FIG. 3 is suitable for the second application scenario of the embodiment of the present application.

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

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

Next, the technical solutions provided by the embodiments of the present application are described with reference to the accompanying drawings.

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

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

S401. A network device determines a first signal.

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

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 spaced apart in the time domain At least 2 symbols.

To avoid blind detection of SSB for narrowband terminal equipment by broadband terminal equipment or other terminal equipment in NR, for example, the scheme of setting SSS on the 3rd symbol, whether it is wideband terminal equipment, or in other NR systems Both terminal equipment can receive PSS and SSS, which leads to unnecessary blind detection of broadband terminal equipment and non-narrowband terminal equipment in other NR systems, and wastes the resources of terminal equipment. The present application proposes the following possible implementation manners to prevent the SSB corresponding to the narrowband terminal equipment from being blindly detected by the non-narrowband terminal equipment, so as to reduce the power consumption of the terminal equipment.

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

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

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

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

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

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

As an implementation manner of an SSB, for example, referring to FIG. 6 , it is a schematic diagram of an SSB. Described in ascending order of symbols, 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 the second symbol in the time domain. Sixth symbol.

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

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 bandwidth reduction is compensated, and the low-cost IoT terminal UE and the NR UE in NR can achieve the same coverage. , compared with the prior art solution of setting the SSS on the third symbol, the solution in the embodiment 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.

When the terminal device performs initial access, the terminal device performs blind detection when detecting the PSS. The terminal device does not know the location of the PSS, and the detection is completely implemented through blind detection. Considering the above solution, the non-narrowband terminal device can determine that the SSB is the SSB corresponding to the narrowband terminal device only after the non-narrowband terminal device cannot detect the SSS, in order to further reduce the false detection of the non-narrowband terminal device and reduce the power consumption of the non-narrowband terminal device.

In the embodiment of the present application, a method for generating a sequence of a PSS signal is also provided. By adding an additional shift value to 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, it can blindly detect the narrowband PSS in the embodiment of the present application. Correspondingly, the narrowband terminal device can determine that the SSB signal is the SSB corresponding to the narrowband terminal device based on the blindly detected narrowband PSS, thereby further reducing the false detection of the NR non-narrowband terminal device and reducing the power consumption of the NR non-narrowband terminal device. .

In a possible implementation manner, the sequence (the first sequence) of the PSS signal may be an m sequence, and the m sequence is used as an example below.

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

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

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

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

The initial value of x(i) satisfies:

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

In this embodiment of the present application, m satisfies:

0≤n＜127

Wherein, n is a positive integer less than 127; the first shift value K is a positive integer less than 43, and K may be a prime number. second shift value

middle

The index number used to represent the PSS,

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

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

Through the above method, the PSS signal in the narrowband SSB is distinguished from the PSS signal in the SSB of the NR system, so as to avoid the erroneous access of the PSS signal in the narrowband SSB sent by the NR terminal through the network, and avoid the extra unnecessary detection caused by the false detection of the NR terminal. power consumption.

S402. The network device sends a first signal.

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

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

1. Detected (that is, received) SSB;

2. No SSB detected (ie not received).

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

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

In the first manner, the SSB time-domain structure is pre-defined by the standard, and the SSB time-domain structure is preconfigured 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 preconfigured or stored in the terminal device;

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

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

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

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

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

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

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

The apparatus for implementing the above method in the embodiments of the present application will be described below with reference to the accompanying drawings. Therefore, the above content can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 8 is a schematic block diagram of a first communication apparatus 800 according to an embodiment of the present application.

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

For example, the processing module 810 may be configured to perform all operations performed by the network device in the embodiment shown in FIG. 4 except for the transceiving operation, for example, step 201, step 203, step 501, step 503, for example, for the first operations such as encoding data, encoding second data, and/or other processes used to support the techniques described herein. Transceiver module 820 may be used to perform all of the transceive operations performed by the network device in the embodiment shown in FIG. 4, and/or for other processes in support of the techniques described herein.

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

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

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

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

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

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

definite.

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

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

FIG. 9 is a schematic block diagram of a second communication apparatus 900 according to an embodiment of the present application.

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

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

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

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

A possible implementation, the method further includes:

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

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

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

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

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

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

Sure.

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

An embodiment of the present application further provides a communication apparatus, where the communication apparatus may be a network device or a circuit. The communication apparatus may be configured to perform the actions performed by the network device in the foregoing method embodiments.

Based on the same concept as the above communication method, as shown in FIG. 10 , an embodiment of the present application further provides a communication apparatus 1000 . The communication apparatus 1000 may be used to implement the method performed by the network device in the foregoing method embodiments, and reference may be made to the descriptions in the foregoing method embodiments, wherein the communication apparatus 1000 may be a network device, a terminal device, a vehicle-mounted device, or may be located in a network device, In the terminal device or the in-vehicle device, it can be a sender device or a receiver device.

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

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

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

computer programs

1003 and 1004 jointly The communication apparatus 1000 is caused to execute the method executed by the network device in the foregoing method embodiments.

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

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

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

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

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

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

Based on the same concept as the above communication method, as shown in FIG. 11 , an embodiment of the present application further provides a second communication apparatus 1100 . The second communication apparatus 1100 may be used to implement the method performed by the narrowband terminal device in the above method embodiments, and reference may be made to the description in the above method embodiments, wherein the second communication apparatus 1100 may be a narrowband terminal device, or may be located in a narrowband terminal device , which can be either the originating device or the receiving device.

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

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

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

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

computer programs

1103 and 1104 jointly The second communication apparatus 1100 is caused to perform the method performed by the narrowband terminal device in the foregoing method embodiments.

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

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

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

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

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

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

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

Embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements the method described in any of the foregoing method embodiments applied to a network device or a narrowband terminal device.

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

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be transferred from a website site, computer, server or data center via wired ( For example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. A computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. Useful media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, high-density digital video disc (DVD)), or semiconductor media (eg, solid state disk (SSD)) )Wait.

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

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

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

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium. When the computer program is executed by a computer, the computer can implement the method shown in FIG. 4 provided by the foregoing method embodiments. Processes related to network equipment or narrowband terminal equipment in the embodiment.

An embodiment of the present application further provides a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 4 provided by the above method embodiment. Processes related to network equipment and narrowband end equipment.

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

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

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

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

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

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

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

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may 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. Taking this as an example but not limited to: the computer-readable medium may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The above are only specific implementations of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes within the technical scope disclosed in the embodiments of the present application. Or alternatives, all 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 based on the protection scope of the claims.

Claims

A communication method, comprising:

determine the first signal;

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

The PSS, the SSS 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.
The method of claim 1, wherein the first signal includes 6 symbols in the time domain.
The method according to claim 1 or 2, characterized in that,

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.
The method according to claim 1 or 2, characterized in that,

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 third symbol in the time domain. Six symbols.
The method according to claim 1 or 2, characterized in that,

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 third symbol in the time domain. Six symbols.
The method according to any one of claims 1-5, wherein the method further comprises:

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

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

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

Wherein, x(m) is the first sequence; mod represents the modulo operation; n is a positive integer less than 127; the K represents the first shift value;
The value range of is {0,1,2}, the
represents the number of the PSS; the second shift value is based on the
Sure.
The method according to any one of claims 1-7, 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 position occupied by the PSS and the SSS.
The method according to any one of claims 1-8, wherein the number of subcarriers occupied by the PBCH in the frequency domain is at least one of the following: 144, 72, or 121.
A communication method, comprising:

receiving the first signal;

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

The PSS, the SSS, 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 in the time domain by at least 2 a symbol;

Time-frequency synchronization and/or system information acquisition is performed according to the received first signal.
The method of claim 10, wherein the first signal comprises 6 symbols in the time domain.
The method of claim 10 or 11, wherein:

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.
The method of claim 10 or 11, wherein:

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 third symbol in the time domain. Six symbols.
The method of claim 10 or 11, wherein:

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 third symbol in the time domain. Six symbols.
The method according to any one of claims 10-14, wherein the method further comprises:

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

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

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

Wherein, the x(m) is the first sequence; mod represents the modulo operation; n is a positive integer less than 127; the K is the first shift value; the
The value range of is {0,1,2}, the
Indicates the number of the PSS; the second shift value is based on the
definite.
The method according to any one of claims 10-16, wherein the frequency domain position occupied by the PBCH is the same as the frequency domain position occupied by the PSS and the SSS; or,

The frequency domain position occupied by the PBCH includes the frequency domain position occupied by the PSS and the SSS.
The method according to any one of claims 10-16, wherein the number of subcarriers occupied by the PBCH in the frequency domain is one of the following: 144, 72, or 121.
A communication device, comprising a processing module and a transceiving module, wherein the processing module is coupled to the transceiving module, and is configured to execute the method according to any one of claims 1 to 9.
A communication device, characterized by comprising a processing module and a transceiver module, wherein the processing module is coupled to the transceiver module, and is configured to execute the method according to any one of claims 10 to 18 .
A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program, and when the computer program is run on a computer, the computer is made to execute any one of claims 1 to 9. The method of claim 10, or causing the computer to execute the method of any one of claims 10-18.
A computer program product, characterized by comprising computer program instructions, which, when executed on a processor, cause the method according to any one of claims 1 to 18 to be performed.
A communication system, characterized by comprising the communication device as claimed in claim 19 and the communication device as claimed in claim 20 .
A chip, characterized by comprising a processor and a communication interface, wherein the processor is configured to read an instruction through the communication interface to execute the method of any one of claims 1 to 9, or to execute the method of claim 10 to The method of any one of 18.