WO2022067780A1 - Access signal sending method and apparatus, and access signal receiving method and apparatus - Google Patents

Abstract

Disclosed are an access signal sending method and apparatus, and an access signal receiving method and apparatus, which relate to the field of wireless communications, and can enable a terminal device with a bandwidth less than 3.6 MHz to receive an SSB, so as to communicate with a network device. The method comprises: a network device determining a first frequency position which can be used for sending a first access signal, and sending a second access signal at a second frequency position, wherein the first frequency position comprises one or more frequency positions, and a third frequency position in the first frequency position is used for sending the first access signal; a bandwidth occupied by the first access signal in a frequency domain is greater than a bandwidth occupied by the second access signal in the frequency domain; and the third frequency position and the second frequency position are located at different positions of the same frequency band, and at least one of the second frequency position and the first frequency position satisfies a set condition.

Description

A kind of transmission method, reception method and device of access signal technical field

The present application relates to the field of wireless communication, and in particular, to a method and apparatus for sending, receiving, and receiving an access signal.

Background technique

The Internet of Things (IoT) is the "Internet of Things Connected". In the IoT, information exchange and communication can take place between objects. Therefore, the application of IoT is very extensive. For example, IoT can be applied to various aspects such as smart grid, smart agriculture, smart transportation, smart home, and environmental detection.

This communication method of IoT can also be called machine type communications (MTC). A node of the MTC may be referred to as an MTC terminal device. An MTC terminal device is very different from a common terminal device (eg, a terminal device in a new radio (NR) system, or a terminal device in a long term evolution (LTE) system). For example, MTC terminal equipment has longer battery life, lower complexity and lower cost than common terminal equipment. Therefore, the bandwidth of the MTC terminal equipment is narrower and the transmission efficiency is also lower.

In a communication system, if a common terminal device wants to communicate with a network device, it needs to perform a cell search. For example, in an NR system, if an ordinary terminal wants to communicate with a network device, it will receive a synchronization signal/broadcast channel block (SS/PBCH block, SSB), and obtain downlink time-frequency synchronization according to the SSB. Usually, the bandwidth occupied by the SSB is 3.6MHz or 7.2MHz, while the bandwidth supported by the MTC terminal equipment may be less than 3.6MHz. Such terminal equipment with a bandwidth of less than 3.6MHz cannot receive SSB and therefore cannot communicate with network equipment.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for sending an access signal, so that a terminal device with a bandwidth less than 3.6 MHz can receive an SSB and then communicate with a network device.

To achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, an embodiment of the present application provides a method for sending an access signal. The method is applied to a first communication system. The method includes: a network device determining a first frequency location that can be used to send a first access signal; a network The device determines a second frequency location and transmits a second access signal at the second frequency location. Wherein, the first frequency position includes one or more frequency positions, and a third frequency position in the first frequency positions is used for sending the first access signal. The bandwidth occupied by the first access signal in the frequency domain is greater than the bandwidth occupied by the second access signal in the frequency domain, the third frequency position and the second frequency position are located at different positions in the same frequency band, and the second frequency position is different from the first frequency position. At least one of the frequency positions satisfies the set condition.

In the method provided in the first aspect, the network device may determine a first frequency position that can be used to send the first access signal, and a third frequency position in the first frequency position is used to send the first access signal, and determine a second frequency position, where a second access signal whose occupied bandwidth is smaller than the bandwidth occupied by the first access signal is sent at the second frequency position, the third frequency position and the second frequency position are located at different positions in the same frequency band, and At least one of the second frequency position and the first frequency position satisfies a set condition. The terminal equipment with smaller bandwidth is enabled to receive the second access signal at the second frequency position. The first access signal and the second access signal may include SSB, or may only include synchronization signals.

The aforementioned terminal device with a smaller bandwidth may be a terminal device with a bandwidth less than 3.6 MHz. Other types of terminal equipment can also use the above scheme.

In a second aspect, an embodiment of the present application provides a method for receiving an access signal. The method is applied to a first communication system. The method includes: the first terminal device determines a second frequency position, and receives a signal from the second frequency position at the second frequency position. The second access signal of the network device; the first terminal device performs time-frequency synchronization according to the second access signal. The first terminal device is a second type terminal device, the bandwidth of the second type terminal device is smaller than the bandwidth of the first type terminal device, and the bandwidth occupied by the second access signal in the frequency domain is smaller than that of the first access signal in the frequency domain The first access signal is a signal that the network device can send to the first type of terminal device at the first frequency position, the first frequency position includes one or more frequency positions, and the third frequency position in the first frequency position The frequency location is used to send the first access signal, the third frequency location and the second frequency location are located at different locations in the same frequency band, and at least one of the second frequency location and the first frequency location satisfies a set condition.

The method provided in the second aspect above enables a terminal device with a smaller bandwidth (eg, a first terminal device) to receive the second access signal from the network device at the second frequency position, and then communicate with the network device. The second access signal may include the SSB, or may only include the synchronization signal.

In a third aspect, an embodiment of the present application provides a communication device, the communication device is applied to a first communication system, and the communication device includes: a processing module and a transceiver module. a processing module for determining a first frequency position that can be used to send the first access signal; the processing module for determining a second frequency position; a transceiver module for sending a second access signal at the second frequency position . Wherein, the first frequency position includes one or more frequency positions, and a third frequency position in the first frequency positions is used for sending the first access signal. The bandwidth occupied by the first access signal in the frequency domain is greater than the bandwidth occupied by the second access signal in the frequency domain. The third frequency position and the second frequency position are located at different positions in the same frequency band, and at least one of the second frequency position and the first frequency position satisfies a set condition.

The communication apparatus provided in the third aspect can determine a first frequency position that can be used to send the first access signal, the third frequency position in the first frequency position is used to send the first access signal, and determine the second frequency position. frequency position, the second access signal with an occupied bandwidth smaller than the bandwidth occupied by the first access signal is sent at the second frequency position, the third frequency position and the second frequency position are located at different positions in the same frequency band, and the first access signal At least one of the two frequency positions and the first frequency position satisfies a set condition. The terminal equipment with smaller bandwidth can receive the second access signal at the second frequency position. The first access signal and the second access signal may include the SSB, or may only include the synchronization signal. The aforementioned terminal device with a smaller bandwidth may be a terminal device with a bandwidth less than 3.6 MHz. Other types of terminal equipment can also use the above solution.

In a fourth aspect, an embodiment of the present application provides a communication device, the communication device is applied to a first communication system, the communication device includes: a transceiver module and a processing module; the processing module is used to determine the second frequency position; receiving the second access signal from the network device at the second frequency position; the processing module is further configured to perform time-frequency synchronization according to the second access signal; wherein the communication device is a second type terminal device, and the second type terminal The bandwidth of the device is smaller than the bandwidth of the first type of terminal device, the bandwidth occupied by the second access signal in the frequency domain is smaller than the bandwidth occupied by the first access signal in the frequency domain, and the first access signal is a network device that can The signal sent to the terminal device of the first type at the frequency position, the first frequency position includes one or more frequency positions, the third frequency position in the first frequency position is used to send the first access signal, and the third frequency position is related to the first frequency position. The two frequency positions are located at different positions in the same frequency band, and at least one of the second frequency position and the first frequency position satisfies a set condition.

The method provided in the fourth aspect above enables a terminal device with a smaller bandwidth (eg, the communication apparatus) to receive the second access signal from the network device at the second frequency position, and then communicate with the network device. The second access signal may include the SSB, or may only include the synchronization signal.

The first aspect, the second aspect, the third aspect and the fourth aspect have the following possible implementation manners:

A possible implementation manner, the frequency interval between the third frequency position and the second frequency position is greater than or equal to the bandwidth occupied by the first access signal in the frequency domain and the second access signal in the frequency domain Half of the sum of the occupied bandwidth. Based on the above method, the network device may send the first access signal at the third frequency position, and the interval between the third frequency position and the third frequency position is greater than or equal to the bandwidth occupied by the first access signal in the frequency domain and the second access signal. The second access signal is sent at a frequency position that is half of the sum of the occupied bandwidths in the frequency domain. In this way, a terminal device with a larger bandwidth can receive the first access signal, and a terminal device with a smaller bandwidth can receive the second access signal.

A possible implementation manner, the first frequency position and the second frequency position satisfy the formula: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ -O; wherein, f ₁ is the first frequency A frequency position in a frequency position, f ₂ is the second frequency position, O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ; wherein, K ₁ is the first access The number of sub-carriers occupied by the signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, K ₂ is the number of sub-carriers occupied by the second access signal, and scs ₂ is the second access signal The subcarrier spacing of the subcarriers occupied by the signal. Based on the above method, the first terminal device and the network device can determine the second frequency position according to one of the first frequency positions, so as to realize an interval O between the second frequency position and one of the first frequency positions. Subsequently, the network device may send the second access signal at the second frequency position, and the first terminal device may receive the second access signal at the second frequency position, and perform time-frequency synchronization according to the second access signal. It can be seen from the above formula that when f ₁ is the third frequency position, the frequency position interval O is half of the sum of the bandwidths occupied by the first access signal and the second access signal in the frequency domain, so that the network device It can realize that the first access signal and the second access signal are adjacent in the frequency domain, so that there is no resource fragmentation between the first access signal and the second access signal, the allocation of frequency domain resources will not be affected, and the frequency domain can be improved. Utilization of domain resources.

A possible implementation manner, the first frequency position and the second frequency position satisfy the formula: f ₂ =f ₁ +O+Δ, and/or, f ₂ =f ₁ -O-Δ; where f ₁ is one of the first frequency positions, f ₂ is the second frequency position, Δ is greater than 0, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ; where, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, K ₂ is the number of sub-carriers occupied by the second access signal, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal. Based on the above method, the first terminal device and the network device can determine the second frequency position according to one of the first frequency positions, so as to achieve an interval of O+Δ between the second frequency position and one of the first frequency positions. Subsequently, the network device may send the second access signal at the second frequency position, and the first terminal device may receive the second access signal at the second frequency position, and perform time-frequency synchronization according to the second access signal.

A possible implementation manner, the Δ is greater than or equal to the frequency interval between the fourth frequency position corresponding to the first access signal and the fifth frequency position corresponding to the control resource set indicated by the first access signal, the control The resource set is used to carry a physical downlink control channel of a scheduling system information block type 1 (system information block type 1, SIB1). Based on the above method, the interval between the second frequency position and one of the first frequency positions is greater than or equal to the frequency interval between the fourth frequency position and the fifth frequency position. In the case where f ₁ is the third frequency position, the influence on the scheduling of the SIB1 corresponding to the first access signal can be reduced, and at the same time, the terminal device can be prevented from receiving the second access signal and receiving the SIB1 corresponding to the second access signal or Frequency switching occurs when other system information occurs, thereby reducing the cost and complexity of terminal equipment.

A possible implementation, the first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 1 and less than 2499, M is 1, 3 or 5, and in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is greater than 1 and less than or equal to An integer of 2499, M is 1, 3 or 5; or, the first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz; at f ₂ =f ₁ +O, or f ₂ =f ₁ +O+ In the case of Δ, N is an integer greater than or equal to 0 and less than 14756, and in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is greater than 0 and less than or equal to 14756 Integer; or, the first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0 and an integer less than 4383, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 4383. Based on the above method, the network device and the first terminal device can determine the first frequency position according to the above formula.

A possible implementation manner, the _second frequency position is the frequency position of the subcarrier k2 in the subcarriers occupied by the _second access signal, where k2 is the number of the subcarrier occupied by the second access signal , k ₂ satisfies:

or

K ₂ is the number of subcarriers occupied by the second access signal. Based on the above method, the network device and the first terminal device may determine the subcarriers occupied by the second access signal according to the second frequency position.

A possible implementation manner, the third frequency position is the frequency position of the subcarrier _k1 in the subcarriers occupied by the first access signal, where _k1 is the number of the subcarrier occupied by the first access signal , k ₁ satisfies:

or

K ₁ is the number of subcarriers occupied by the first access signal. Based on the above method, the network device and the first terminal device may determine the subcarriers occupied by the first access signal according to the third frequency position.

In a possible implementation manner, the first access signal and the second access signal are adjacent in the frequency domain. Based on the above method, there is no resource fragmentation between the first access signal and the second access signal, the allocation of frequency domain resources will not be affected, and the utilization rate of frequency domain resources can be improved.

In a fifth aspect, an embodiment of the present application provides yet another method for sending an access signal, the method is applied to a first communication system, and the method includes: the network device determines a second frequency position, and sets the second frequency position at the second frequency position. A second access signal is sent.

In a sixth aspect, an embodiment of the present application provides yet another method for receiving an access signal, the method is applied to a first communication system, and the method includes: the first terminal device determines a second frequency position, and sets the second frequency position at the second frequency position. Receive a second access signal from a network device; the first terminal device performs time-frequency synchronization according to the second access signal.

In a seventh aspect, an embodiment of the present application provides a communication device, where the communication device is applied to a first communication system, and the communication device includes: a processing module and a transceiver module. The processing module is used to determine the second frequency position; the transceiver module is used to send the second access signal at the second frequency position.

In an eighth aspect, an embodiment of the present application provides a communication device, where the communication device is applied to a second communication system, and the communication device includes: a processing module and a transceiver module. The processing module is used to determine the second frequency position; the transceiver module is used to receive the second access signal from the network device at the second frequency position; the processing module is also used to perform time-frequency synchronization according to the second access signal.

In the method of the fifth aspect and the sixth aspect, and the communication system of the seventh aspect and the eighth aspect, the second frequency position may satisfy: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ − O; or satisfy: f ₂ =f ₁ +O+Δ, and/or, f ₂ =f ₁ -O-Δ, where Δ is greater than 0, and f ₁ satisfies the formula: f ₁ =N*P ₁ +M* P ₂ +P ₃ , O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ , or O=K ₂ /2*scs ₂ +C ₁ , or O=(K ₂ /2 +C ₂ )*scs ₂ , or O=C ₃ *scs ₂ ;

Among them, P ₁ ≥ 0, P ₂ ≥ 0, P ₃ ≥ 0, N ≥ 0, M ≥ 0, K ₁ > 0, scs ₁ > 0, C ₁ > 0, C ₂ > 0, C ₃ > 0, K ₂ is the number of sub-carriers occupied by the second access signal, and scs ₂ is the sub-carrier spacing of the sub-carriers occupied by the second access signal.

Optionally, C ₁ is 1800kHz, 3600kHz, 7200kHz, or 14400kHz. Optionally, _C2 is 120. Optionally, _C3 is 156, 186 or 192. Optionally, P ₁ , P ₂ and P ₃ are not 0 at the same time.

The f ₁ and O here can also be used in other implementations, such as the methods and apparatuses in the aforementioned first to fourth aspects.

The above f ₁ can specifically satisfy: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 1 and less than 2499 The integer of , M is 1, 3 or 5, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 1 and less than or equal to 2499, M is 1, 3 or 5; or,

f1 can satisfy: f ₁ =3000MHz+N*1.44MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 0 and less than 14756, in In the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 14756; or,

f1 can satisfy: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 0 and less than 4383, In the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and 4383 or less.

Optionally, the _second frequency position is the frequency position of the subcarrier k2 in the subcarriers occupied by the _second access signal, where k2 is the number of the subcarrier occupied by the second access signal , k ₂ satisfies:

or

K ₂ is the number of subcarriers occupied by the second access signal.

In a ninth aspect, an embodiment of the present application provides a communication device, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or the instruction is executed by the processor , so that the apparatus implements the method described in the first aspect or any possible implementation manner of the first aspect, or the fifth aspect or the method described in any possible implementation manner of the fifth aspect.

In a tenth aspect, an embodiment of the present application provides a communication device, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , so that the device implements the method described in the second aspect or any possible implementation manner of the second aspect, or the sixth aspect or the method described in any possible implementation manner of the sixth aspect.

In an eleventh aspect, an embodiment of the present application provides a communication device, and the device is configured to implement the above-mentioned first aspect, or the method described in any possible implementation manner of the first aspect, or the above-mentioned fifth aspect, or the first The method described in any possible implementation manner of the fifth aspect.

In a twelfth aspect, an embodiment of the present application provides a communication device, which is configured to implement the above-mentioned second aspect, or the method described in any possible implementation manner of the second aspect, or the above-mentioned sixth aspect, or the first The method described in any possible implementation manner of the six aspects.

In a thirteenth aspect, embodiments of the present application provide a computer-readable medium on which computer programs or instructions are stored, and when the computer programs or instructions are executed, cause a computer to execute the first aspect or any one of the first aspects. The method described in the possible implementation manner, or the above-mentioned fifth aspect, or the method described in any possible implementation manner of the fifth aspect.

A fourteenth aspect, an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the second aspect or any one of the second aspect. The method described in the possible implementation manner, or the above-mentioned sixth aspect, or the method described in any possible implementation manner of the sixth aspect.

A fifteenth aspect, an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code is run on a computer, causes the computer to execute the first aspect or any of the possible first aspects. The method described in the implementation manner, or the above-mentioned fifth aspect, or the method described in any possible implementation manner of the fifth aspect.

A sixteenth aspect, an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code is run on a computer, the computer program code enables the computer to execute the second aspect or any of the possible second aspects. The method described in the implementation manner, or the above sixth aspect, or the method described in any possible implementation manner of the sixth aspect.

In a seventeenth aspect, an embodiment of the present application provides a chip, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , so that the chip implements the method described in the first aspect or any possible implementation manner of the first aspect, or the fifth aspect or the method described in any possible implementation manner of the fifth aspect.

In an eighteenth aspect, an embodiment of the present application provides a chip, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , so that the chip implements the method described in the second aspect, or any possible implementation manner of the second aspect, or the sixth aspect, or the method described in any possible implementation manner of the sixth aspect.

In a nineteenth aspect, an embodiment of the present application provides a communication system. The system includes the device described in the third aspect and/or the device described in the fourth aspect, or the system includes the device described in the fifth aspect and/or the device described in the sixth aspect, or the system It includes the device of the seventh aspect and/or the device of the eighth aspect.

It can be understood that any of the communication devices, chips, computer-readable media, computer program products or communication systems provided above are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can be achieved. Referring to the beneficial effects in the corresponding method, details are not repeated here.

Description of drawings

FIG. 1A is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

FIG. 1B is a schematic diagram of frequency domain positions of a narrowband SSB and a wideband SSB provided by an embodiment of the present application;

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

3 is a schematic flowchart of a method for sending an access signal according to an embodiment of the present application;

4 is a schematic diagram of a third frequency location provided by an embodiment of the present application;

5 is a schematic diagram of a second frequency location provided by an embodiment of the present application;

6 is a schematic diagram of a relationship between a third frequency position and a second frequency position according to an embodiment of the present application;

7 is a schematic diagram of a bandwidth of a first type of terminal device and a bandwidth of a second type of terminal device provided by an embodiment of the present application;

8 is a schematic diagram of a third frequency position, a second frequency position, a control resource set indicated by a first access signal, and a control resource set indicated by a second access signal in the frequency domain according to an embodiment of the present application;

FIG. 9 is a schematic diagram of the location in the frequency domain of a first access signal and a control resource set indicated by the first access signal according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram 1 of a communication device provided by an embodiment of the present application;

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

FIG. 12 is a schematic diagram of the composition of a communication system provided by an embodiment of the present application.

Detailed ways

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

The methods provided in the embodiments of the present application can be used in various communication systems. For example, the communication system may be a long term evolution (LTE) system, a fifth generation (5G) communication system, a new radio (NR) system, a wireless-fidelity (WiFi) system , 3rd generation partnership project (3rd generation partnership project, 3GPP) related communication systems and future evolution communication systems, etc., are not limited. The following only takes the communication system 10 shown in FIG. 1A as an example to describe the method provided by the embodiment of the present application.

As shown in FIG. 1A , it is a schematic structural diagram of a communication system 10 according to an embodiment of the present application. In FIG. 1A , the communication system 10 may include one or more network devices 101 (only one is shown) and a terminal device 102 - a terminal device 104 that can communicate with the network device 101 . FIG. 1A is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solutions provided in the present application.

In FIG. 1A, a network device may provide a wireless access service for a terminal device. Specifically, each network device corresponds to a service coverage area, and a terminal device entering the area can communicate with the network device through the Uu port to receive wireless access services provided by the network device. The terminal device and the network device can communicate through the Uu port link. The Uu interface link can be divided into uplink (uplink, UL) and downlink (downlink, DL) according to the direction of the data transmitted thereon. The uplink data sent from the terminal equipment to the network equipment can be transmitted on the UL, and the downlink data transmitted from the network equipment to the terminal equipment can be transmitted on the DL. For example, in FIG. 1A, the terminal device 103 is located in the coverage area of the network device 101, the network device 101 can send downlink data to the terminal device 103 through DL, and the terminal device 103 can send uplink data to the network device 101 through UL.

The network device in FIG. 1A , for example, the network device 101 may be any device with a wireless transceiver function. Including but not limited to: evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, base station (gNodeB or gNB) or transceiver point (transmission receiving point/transmission receiving point, TRP) in NR, 3GPP Subsequent evolution of base stations, access nodes in WiFi systems, wireless relay nodes, wireless backhaul nodes, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, or a balloon station, etc. Multiple base stations may support the above-mentioned networks of the same technology, or may support the above-mentioned networks of different technologies. A base station may contain one or more co-sited or non-co-sited TRPs. The network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device may also be a server, a wearable device, a machine communication device, or a vehicle-mounted device. The following description takes the network device as the base station as an example. The multiple network devices may be base stations of the same type, or may be base stations of different types. The base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station. The terminal device can communicate with multiple base stations of different technologies. For example, the terminal device can communicate with the base station supporting the LTE network, the base station supporting the 5G network, and the base station supporting the LTE network and the base station of the 5G network. Dual connection.

The terminal device in FIG. 1A, for example: terminal device 102, terminal device 103 or terminal device 104 is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; it can also be deployed On the water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, industrial control ( terminal equipment in industrial control), vehicle terminal equipment, terminal equipment in self driving, terminal equipment in assisted driving, terminal equipment in remote medical (remote medical), terminal equipment in smart grid (smart grid) Terminal equipment, terminal equipment in transportation safety, terminal equipment in smart city, terminal equipment in smart home, etc. The embodiments of the present application do not limit application scenarios. Terminal equipment may also sometimes be referred to as terminal, user equipment (UE), access terminal, vehicle terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile equipment, UE terminal equipment, wireless communication equipment, machine terminal, UE proxy or UE device, etc. Terminal equipment can be fixed or mobile.

The above-mentioned relay may be the above-mentioned network device or the above-mentioned terminal device, which is not limited.

As an example and not a limitation, in this application, the terminal device may be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. 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 jewelry, etc. for physical sign monitoring.

In this application, the terminal equipment can be the terminal equipment in the IoT system. IoT is an important part of the future development of information technology. An interconnected, intelligent network. The terminal equipment in this application may be the terminal equipment in the MTC. The terminal device of the present application may be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle passes the built-in on-board module, on-board module, on-board unit A component, on-board chip or on-board unit may implement the method of the present application.

In the communication system 10 shown in FIG. 1A , the network device 101 broadcasts and transmits the SSB. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH). For the introduction of PSS, SSS and PBCH, reference may be made to the explanation in the conventional technology, and details are not repeated.

If the terminal device, for example, the terminal device 102, the terminal device 103 or the terminal device 104, wants to communicate with the network device 101, the terminal device needs to determine the possible frequency positions (frequency positions) where the network device sends SSB, and at these frequency positions Detect SSB.

In the NR system, the terminal device can determine the possible frequency positions where the network device sends the SSB according to the synchronization raster. A sync grid defines a range of frequency locations where SSBs may occur. The relevant parameters of the synchronization grid can be shown in Table 1 and Table 2.

Table 1

Frequency Range	SSB frequency position SS REF	GSCN	GSCN range
0MHz-3000MHz	f 1 =N*1200kHz+M*50kHz	3N+(M-3)/2	2-7498
3000MHz-24250MHz	f 1 =3000MHz+N*1.44MHz	7499+N	7499-22255

In Table 1, if the frequency range is 0MHz-3000MHz, the possible frequency position of SSB is f ₁ =N*1200kHz+M*50kHz, N is an integer greater than or equal to 1 and less than or equal to 2499, and M is 1, 3 or 5. The number corresponding to each frequency location may be referred to as a global synchronization channel number (GSCN). If the frequency range is 0MHz-3000MHz, the GSCN is 3N+(M-3)/2, and the GSCN range is 2-7498. If the frequency range is 3000MHz-24250MHz, the possible frequency position of the SSB is f ₁ =3000MHz+N*1.44MHz, where N is an integer greater than or equal to 0 and less than or equal to 14756, GSCN is 7499+N, and the GSCN range is 7499-22255.

Table 2

Frequency Range	SSB frequency position SS REF	GSCN	GSCN range
24250MHz-52600MHz	f 1 =24250.08MHz+N*17.28MHz	22256+N	22256-26639

In Table 2, if the frequency range is 24250MHz-52600MHz, the possible frequency position of SSB is f ₁ =24250.08MHz+N*17.28MHz, N is an integer greater than or equal to 0 and less than or equal to 4383, GSCN is 22256+N, the range of GSCN as 22256-26639.

It can be understood that the above Table 1 and Table 2 are only examples of the relevant parameters of the synchronization grid. In practical applications, the relevant parameters of the synchronization grid may also be in other forms, which are not limited.

After the terminal device detects the SSB, it will obtain downlink time-frequency synchronization according to the SSB. The terminal device also determines the control resource set according to the PBCH in the SSB. The control resource set is a time-frequency resource used for transmitting a physical downlink control channel (PDCCH). The PDCCH is used to schedule system information block type 1 (system information block type1, SIB1). In the NR system, the control resource set can be called CORESET (control resource set).

After determining the control resource set, the terminal device receives the PDCCH on the control resource set, and receives the SIB1 according to the PDCCH. In this way, the terminal device can access the network device according to the SIB1.

With the development of IoT, in order to prolong the battery life of terminal equipment, reduce the complexity of terminal equipment, and reduce the cost of terminal equipment, terminal equipment with narrow bandwidth is introduced. The bandwidth of such terminal equipment may be smaller than that occupied by the SSB, so it cannot receive the SSB and cannot communicate with the network equipment.

Exemplarily, taking the communication system 10 shown in FIG. 1A as an NR system as an example, when the subcarrier spacing is 15 kHz, the bandwidth occupied by the SSB is 3.6 MHz, and when the subcarrier spacing is 30 kHz, the bandwidth occupied by the SSB is 7.2MHz. The bandwidth of the terminal device with the narrow bandwidth may be less than 3.6MHz, for example, 2MHz. In this case, the terminal device with the narrow bandwidth cannot receive the SSB, and therefore cannot communicate with the network device.

In order to solve the problem that the terminal device with narrow bandwidth cannot receive the SSB, a narrowband SSB can be introduced. The bandwidth occupied by the narrowband SSB is smaller than the bandwidth occupied by the wideband SSB. The possible frequency location of the narrowband SSB may be the same as the possible frequency location of the above-mentioned wideband SSB. That is, the narrowband SSB uses the same synchronization grid as the wideband SSB. In this way, a terminal device with a narrow bandwidth can detect the narrowband SSB, and obtain downlink time-frequency synchronization according to the narrowband SSB.

However, if the narrowband SSB and the wideband SSB use the same synchronization grid, the frequency domain resources between the narrowband SSB and the wideband SSB may be smaller than the minimum scheduling unit of the frequency domain resources (for example, a resource block (RB)). In this case, the frequency domain resources between the narrowband SSB and the wideband SSB will become resource fragments, which affects the allocation of frequency domain resources.

Exemplarily, the subcarrier spacing of the subcarriers occupied by the narrowband SSB and the wideband SSB is 30 kHz, the frequency positions of the narrowband SSB and the wideband SSB are between 0MHz and 3000MHz, the narrowband SSB occupies 6 RBs, and the wideband SSB occupies 20 RBs. For example, FIG. 1B shows the frequency positions of the narrowband SSB and the wideband SSB in the case that the narrowband SSB and the wideband SSB are closely spaced in the frequency domain. In FIG. 1B , the position of the arrow is the position in the frequency domain where the network device may transmit the broadband SSB or the narrowband SSB. Arrow 105 is the frequency position where the network device sends the broadband SSB, and arrow 106 is the frequency position where the network device sends the narrowband SSB. In FIG. 1B , the frequency domain resource between the narrowband SSB and the wideband SSB is 120 kHz, and 120 kHz is less than 1 RB, which will affect the frequency domain resource allocation.

In order to avoid resource fragmentation, an embodiment of the present application provides a method for sending an access signal. The method includes: a network device determines a first frequency location that can be used to send a first access signal; the network device is at a second frequency location send a second access signal on the The specific process of the method will be described in the following embodiment shown in FIG. 3 .

It can be understood that the communication system 10 shown in FIG. 1A is only used for example, and is not used to limit the technical solution of the present application. Those skilled in the art should understand that in the specific implementation process, the communication system 10 may also include other devices, and the number of network devices and terminal devices may also be determined according to specific needs, which is not limited.

Optionally, each network element in FIG. 1A in this embodiment of the present application, such as network device 101 , terminal device 102 , terminal device 103 , or terminal device 104 , may be a functional module in one device. It can be understood that the functional module can be an element in a hardware device, for example, a communication chip or a communication component in a terminal device or a network device, or a software functional module running on hardware, or a platform (for example, A virtualized function instantiated on a cloud platform).

For example, each network element in FIG. 1A may be implemented by the communication apparatus 200 in FIG. 2 . FIG. 2 is a schematic diagram of a hardware structure of a communication device applicable to an embodiment of the present application. The communication device 200 includes at least one processor 201 , a communication line 202 , a memory 203 and at least one communication interface 204 .

The processor 201 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the programs of the present application. integrated circuit.

Communication line 202 may include a path, such as a bus, for transferring information between the components described above.

Communication interface 204, using any transceiver-like device for communicating with other devices or communication networks, such as Ethernet interfaces, radio access network (RAN), wireless local area networks (wireless local area networks, WLAN), etc.

Memory 203 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation. The memory may exist independently and be connected to the processor through the communication line 202 . The memory can also be integrated with the processor. The memory provided by the embodiments of the present application may generally be non-volatile. The memory 203 is used for storing the computer-executed instructions involved in executing the solution of the present application, and the execution is controlled by the processor 201 . The processor 201 is configured to execute the computer-executed instructions stored in the memory 203, thereby implementing the method provided by the embodiments of the present application.

Optionally, the computer-executed instructions in the embodiment of the present application may also be referred to as application code, which is not specifically limited in the embodiment of the present application.

In a specific implementation, as an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .

In a specific implementation, as an embodiment, the communication apparatus 200 may include multiple processors, such as the processor 201 and the processor 207 in FIG. 2 . Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a specific implementation, as an embodiment, the communication apparatus 200 may further include an output device 205 and an input device 206 . The output device 205 is in communication with the processor 201 and can display information in a variety of ways. For example, the output device 205 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. Input device 206 is in communication with processor 201 and can receive user input in a variety of ways. For example, the input device 206 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

The above-mentioned communication apparatus 200 may be a general-purpose device or a dedicated device. In a specific implementation, the communication device 200 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in FIG. 2 . equipment. This embodiment of the present application does not limit the type of the communication apparatus 200 .

The method for sending an access signal provided by the embodiment of the present application will be described in detail below with reference to FIG. 1A and FIG. 2 .

It should be noted that, in this embodiment of the present application, "/" may indicate that the related objects are an "or" relationship, for example, A/B may indicate A or B; "and/or" may be used to describe There are three kinds of relationships between related objects, for example, A and/or B, which can be expressed as: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural.

In order to facilitate the description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" may be used to distinguish technical features with the same or similar functions. The words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit the difference. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations, and any embodiment or design solution described as "exemplary" or "for example" should not be construed are preferred or advantageous over other embodiments or designs. The use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner to facilitate understanding.

It should be noted that, in the embodiments of the present application, for a technical feature, “first”, “second”, “third”, “A”, “B”, “C” and “D” etc. Distinguish the technical features among such technical features, and the technical features described in the "first", "second", "third", "A", "B", "C" and "D" are in no order or size order.

It can be understood that the same step or steps or signals having the same function in the embodiments of the present application may refer to each other for reference between different embodiments.

It can be understood that, in the embodiments of the present application, the network device and/or the first terminal device may perform some or all of the steps in the embodiments of the present application, these steps are only examples, and the embodiments of the present application may also perform other steps or various Variation of steps. In addition, various steps may be performed in different orders presented in the embodiments of the present application, and it may not be necessary to perform all the steps in the embodiments of the present application.

In the embodiment of the present application, the specific structure of the execution body of a method for sending an access signal is not particularly limited in the embodiment of the present application, as long as the method provided by the embodiment of the present application can be implemented. For example, the execution subject of the method for sending an access signal provided in this embodiment of the present application may be a network device, or a component applied in the network device, such as a chip, which is not limited in this application. Alternatively, the execution subject of the method for sending an access signal provided by this embodiment of the present application may be the first terminal device, or a component applied in the first terminal device, such as a chip, which is not limited in this application. The following embodiments are described by taking an example that the execution bodies of a method for sending an access signal are a network device and a first terminal device respectively.

As shown in FIG. 3 , a method for sending an access signal is provided in an embodiment of the present application. The method is applied to the first communication system. The first communication system may be an NR system, an LTE system, a 3GPP-related communication system, a future evolved communication system, or the communication system 10 shown in FIG. 1A , or the like. The method for sending an access signal includes steps 301-303.

Step 301: The network device determines a first frequency location that can be used to send the first access signal.

The network device may be the network device 101 in the communication system 10 shown in FIG. 1A . The first access signal includes an SSB or synchronization signal (eg, PSS and/or SSS). The first access signal may be an access signal sent by the network device to the terminal device of the first type. It can be understood that the bandwidth occupied by the first access signal is less than or equal to the bandwidth of the first type of terminal device.

The first frequency location includes one or more frequency locations. Exemplarily, the first frequency position has the following three situations:

Case 1: When the frequency range is 0MHz-3000MHz, the first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz. Among them, N is an integer greater than or equal to 1 and less than or equal to 2499, and M is 1, 3 or 5.

Exemplarily, when the frequency range is 0MHz-3000MHz, the network device can determine one or more frequency positions according to the above formula. For example, when N=1 and M=1, f ₁ =1200kHz+50kHz=1250kHz. When N=1 and M=3, f ₁ =1200kHz+3*50kHz=1350kHz. When N=1 and M=5, f ₁ =1200kHz+5*50kHz=1450kHz.

Case 2: When the frequency range is 3000MHz-24250MHz, the first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz. Among them, N is an integer greater than or equal to 0 and less than or equal to 14756.

Exemplarily, when the frequency range is 3000MHz-24250MHz, the network device may determine one or more frequency positions according to the above formula. For example, when N=0, f ₁ =3000MHz+0*1.44MHz=3000MHz. When N=1, f ₁ =3000MHz+1*1.44MHz=3001.44MHz.

Case 3: When the frequency range is 24250MHz-52600MHz, the first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz. Among them, N is an integer greater than or equal to 0 and less than or equal to 4383.

Exemplarily, when the frequency range is 24250MHz-52600MHz, the network device can determine one or more frequency positions according to the above formula. For example, when N=0, f ₁ =24250.08MHz+0*17.28MHz=24250.08MHz. In the case of N=1, f ₁ =24250.08MHz+1*17.28MHz=24267.36MHz.

In a possible implementation manner, after determining the first frequency position that can be used to send the first access signal, the network device may send the first access signal at a third frequency position in the first frequency position. The third frequency position is any one of the first frequency positions.

The third frequency position is the frequency position of subcarrier k ₁ in the subcarriers occupied by the first access signal. Wherein, k ₁ is the serial number of the subcarrier occupied by the first access signal. k ₁ satisfies:

or

K ₁ is the number of subcarriers occupied by the first access signal.

Further, the frequency position of the sub-carrier k ₁ refers to the center frequency of the sub-carrier k ₁ . Among the subcarriers occupied by the first access signal, the subcarrier numbers of the first access signal are numbered from 0 in an increasing or decreasing order of frequency.

Please refer to FIG. 4 , which is a schematic diagram of the third frequency position. The number of subcarriers occupied by the first access signal shown in FIG. 4 is 240. The third frequency position is the frequency position of the subcarrier 120 in the subcarriers occupied by the first access signal.

Step 302: The network device determines a second frequency location, and sends a second access signal at the second frequency location.

Wherein, the second access signal includes SSB or synchronization signal (eg, PSS and/or SSS). The bandwidth occupied by the second access signal in the frequency domain is smaller than the bandwidth occupied by the first access signal in the frequency domain. For example, the bandwidth occupied by the second access signal in the frequency domain is 2 MHz. The bandwidth occupied by the first access signal in the frequency domain is 3.6 MHz.

The second access signal may be an access signal sent by the network device to the terminal device of the first type and/or to the terminal device of the second type. Wherein, the bandwidth of the terminal device of the second type is smaller than the bandwidth of the terminal device of the first type. For example, the bandwidth of the second type of terminal equipment is 3MHz. The bandwidth of the first type of terminal equipment is 7.2MHz. It can be understood that the bandwidth occupied by the second access signal is less than or equal to the bandwidth of the second type of terminal device.

In a possible implementation manner, the second frequency position is the frequency position of the subcarrier k ₂ in the subcarriers occupied by the second access signal. Wherein, k ₂ is the number of the subcarrier occupied by the second access signal, and k ₂ satisfies:

or

K ₂ is the number of subcarriers occupied by the second access signal.

Further, the frequency position of the sub-carrier k ₂ refers to the center frequency of the sub-carrier k ₂ . Among the subcarriers occupied by the second access signal, the subcarrier numbers of the second access signal are numbered from 0 in an increasing or decreasing order of frequency.

Please refer to FIG. 5 , which is a schematic diagram of the second frequency position. The number of subcarriers occupied by the second access signal shown in FIG. 5 is 72. The second frequency position is the frequency position of the subcarrier 36 in the subcarriers occupied by the second access signal.

In a possible implementation manner, the second frequency position and the third frequency position are located at different positions in the same frequency band, and at least one of the second frequency position and the first frequency position satisfies a set condition. Wherein, at least one of the first frequency positions may be the third frequency position, or may not be the third frequency position.

The frequency band can be a frequency range. For example, in the NR system, two frequency ranges are defined, frequency range 1 (frequency range 1, FR1) and frequency range 2 (frequency range 2, FR2). FR1 corresponds to 410MHz-7125MHz, and FR2 corresponds to 24250MHz-52600MHz. The frequency band can also be an operating band. For example, multiple working frequency bands are defined and numbered in the NR system. The working frequency band numbered n1 corresponds to an uplink frequency of 1920MHz-1980MHz and a corresponding downlink frequency of 2110MHz to 2170MHz.

A possible implementation manner, the frequency interval between the third frequency position and the second frequency position is greater than or equal to the sum of the bandwidth occupied by the first access signal in the frequency domain and the bandwidth occupied by the second access signal in the frequency domain. and half.

It can be understood that the frequency interval between the third frequency position and the second frequency position is equal to half of the sum of the bandwidth occupied by the first access signal in the frequency domain and the bandwidth occupied by the second access signal in the frequency domain. In this case, the first access signal and the second access signal are adjacent in the frequency domain. Therefore, there is no resource fragmentation between the first access signal and the second access signal, the allocation of frequency domain resources is not affected, and the utilization rate of frequency domain resources can be improved.

It can be understood that there may be various conditions set above. By way of example, the embodiments of the present application take the following two conditions as examples for introduction.

Condition 1: The formula: f ₂ =f ₁ +O, and/or f ₂ =f ₁ -O is satisfied between the first frequency position and the second frequency position.

Wherein, f ₁ is one of the first frequency positions. f ₂ is the second frequency position. O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ .

Wherein, K ₁ is the number of subcarriers occupied by the first access signal. scs ₁ is the subcarrier spacing of the subcarriers occupied by the first access signal. K ₂ is the number of subcarriers occupied by the second access signal. scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal. scs ₁ and scs ₂ can be the same.

Exemplarily, taking f ₁ as 6000kHz, K ₁ as 240, K ₂ as 72, and scs ₁ and scs ₂ as 30 kHz, O=240/2*30+72/ ₂ *30=4680kHz, f2=6000 +4680=10680kHz, and/or, f2= _6000-4680 =1320kHz.

It can be understood that f ₁ can also be the third frequency position. In this case, the first access signal and the second access signal are adjacent in the frequency domain. For example, the relationship between the third frequency position and the second frequency position may be as shown in FIG. 6 .

It can be understood that for the above case 1, in the case of f ₂ =f ₁ +O, N is an integer greater than or equal to 1 and less than 2499, and M is 1, 3 or 5; in the case of f ₂ =f ₁ -O In this case, N is an integer greater than 1 and less than or equal to 2499, and M is 1, 3 or 5. For the above case 2, in the case of f ₂ =f ₁ +O, N is an integer greater than or equal to 0 and less than 14756; in the case of f ₂ =f ₁ -O, N is greater than 0 and less than or equal to 14756 the integer. For the above case 3, in the case of f ₂ =f ₁ +O, N is an integer greater than or equal to 0 and less than 4383; in the case of f ₂ =f ₁ -O, N is greater than 0 and less than or equal to 4383 the integer.

It can be understood that, according to the description in FIG. 1A , after detecting the access signal, the terminal device will determine the control resource set indicated by the access signal according to the access signal, and receive the PDCCH on the control resource set, so as to receive the PDCCH according to the PDCCH. SIB1. If the terminal device is the first type of terminal device, the bandwidth of the terminal device can cover both the frequency position of the access signal and the frequency position of the control resource set indicated by the access signal. Therefore, after detecting the access signal, the terminal device can receive the PDCCH on the control resource set indicated by the access signal without switching frequency positions. If the terminal device is the second type of terminal device, the bandwidth of the terminal device cannot cover the frequency location of the access signal and the set of control resources indicated by the access signal at the same time. Therefore, after receiving the access signal, the terminal device may need to switch frequencies before receiving the PDCCH, which increases the complexity of the terminal device and further increases the cost of the terminal device.

For example, as shown in FIG. 7 , it is a schematic diagram of the bandwidth of the first type of terminal equipment and the bandwidth of the second type of terminal equipment. In FIG. 7 , the bandwidth of the terminal device of the first type is equal to the bandwidth occupied by the control resource set indicated by the first access signal. The bandwidth of the first type of terminal equipment may simultaneously cover the frequency position of the first access signal and the frequency position of the control resource set indicated by the first access signal. The bandwidth of the second type of terminal equipment is equal to the bandwidth occupied by the second access signal. The bandwidth of the second type of terminal equipment cannot cover both the frequency position of the second access signal and the frequency position of the control resource set indicated by the second access signal. In this case, after receiving the second access signal, the second type terminal device needs to switch the frequency position, so that the bandwidth of the second type terminal device can cover the frequency position of the control resource set indicated by the second access signal. This will increase the complexity of the terminal device, which in turn will increase the cost of the terminal device. To avoid increasing the complexity of the terminal device, the second frequency position may be determined through the following condition 2.

Condition 2: The first frequency position and the second frequency position satisfy the formula: f ₂ =f ₁ +O+Δ, and/or, f ₂ =f ₁ -O-Δ;

For the introduction of f ₁ , f ₂ , and O, reference may be made to the corresponding descriptions in Condition 1 above. Δ is greater than 0.

Exemplarily, taking f ₁ as 12250kHz, K ₁ as 240, K ₂ as 72, scs ₁ and scs ₂ as 30kHz, and Δ as 720kHz, O=240/2*30+72/2*30=4680kHz, f2=12250 ₊ 4680+720=17650kHz, and/or, f2= _{12250-4680-720} =6850kHz.

It can be understood that f ₁ can also be the third frequency position. The positions of the third frequency position, the second frequency position, the control resource set indicated by the first access signal, and the control resource set indicated by the second access signal in the frequency domain may be as shown in FIG. 8 . It can be seen from FIG. 8 that the bandwidth of the second type of terminal equipment can cover both the frequency position of the second access signal and the frequency position of the control resource set indicated by the second access signal.

In a possible implementation manner, Δ is greater than or equal to the frequency interval between the fourth frequency position corresponding to the first access signal and the fifth frequency position corresponding to the control resource set indicated by the first access signal. The fourth frequency position is the frequency position corresponding to the lowest frequency RB in the frequency domain resources of the first access signal. The fifth frequency position is the frequency position corresponding to the lowest frequency RB in the control resource set.

Exemplarily, take the first access signal and the control resource set indicated by the first access signal as shown in FIG. 9 as an example. In FIG. 9 , Δ is the frequency interval between the fourth frequency position corresponding to the first access signal and the fifth frequency position corresponding to the control resource set indicated by the first access signal.

In another possible implementation manner, Δ is the frequency position of each third access signal in the third access signal corresponding to each frequency position in the first frequency position and the control resource indicated by each third access signal The largest frequency interval among the frequency intervals between the frequency positions of the set.

Wherein, any third access signal is an access signal that is assumed to be sent by the network device at a frequency position corresponding to the third access signal.

Exemplarily, taking the first frequency position including 3 frequency positions, which are respectively frequency position 1, frequency position 2 and frequency position 3, as an example, if frequency position 1 corresponds to the control of the indication of the third access signal corresponding to frequency position 1 The frequency interval between the frequency positions of the resource set is 10080 kHz, the frequency interval between the frequency positions of the frequency position 2 and the frequency positions of the control resource set indicated by the third access signal corresponding to the frequency position 2 is 6840 kHz, and the frequency position 3 and the frequency position The frequency interval between the frequency positions of the indicated control resource set of the third access signal corresponding to 3 is 2880 kHz, and Δ is 10080 kHz.

Exemplarily, Δ may be 360kHz, 525kHz, 705kHz, 720kHz, 885kHz, 1065kHz, 1080kHz, 1245kHz, 1425kHz, 1440kHz, 1605kHz, 1785kHz, 1800kHz, 1965kHz, 2145kHz, 2160kHz, 2325kHz, 2505kHz, 2520kHz, 2685kHz, 2865kHz , 3045kHz, 3225kHz, 3240kHz, 3405kHz, 3585kHz, 4320kHz, 4485kHz, 4665kHz, 5040kHz, 5205kHz, 5385kHz, 5760kHz, 5925kHz, 6105kHz, 6480kHz, 6645kHz, 6825kHz, 7200kHz, 365kHz, 7545kHz, 100080kHz, etc.

It can be understood that for the above case 1, in the case of f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 1 and less than 2499, and M is 1, 3 or 5; in the case of f ₂ =f ₁ - In the case of O-Δ, N is an integer greater than 1 and less than or equal to 2499, and M is 1, 3, or 5. For the above case 2, in the case of f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 0 and less than 14756; in the case of f ₂ =f ₁ -O-Δ, N is greater than 0, and an integer less than or equal to 14756. For the above case 3, in the case of f ₂ =f ₁ +O+Δ, N is an integer greater than or equal to 0 and less than 4383; in the case of f ₂ =f ₁ -O-Δ, N is greater than 0, and an integer less than or equal to 4383.

Correspondingly, the first terminal device and/or the second terminal device determine the second frequency position, and receive the second access signal from the network device at the second frequency position.

Wherein, the first terminal device is a second type of terminal device. The first terminal device may be any terminal device in the communication system 10 shown in FIG. 1A . For example, the first terminal device is the terminal device 102, the terminal device 103, or the terminal device 104 in FIG. 1A.

The second terminal device is a terminal device of the first type. The second terminal device is the terminal device in FIG. 1A . For example, if the first terminal device is the terminal device 102 in FIG. 1A , the second terminal device is the terminal device 103 or the terminal device 104 in FIG. 1A . If the first terminal device is the terminal device 103 in FIG. 1A , the second terminal device is the terminal device 102 or the terminal device 104 in FIG. 1A . If the first terminal device is the terminal device 104 in FIG. 1A , the second terminal device is the terminal device 102 or the terminal device 103 in FIG. 1A .

In a possible implementation manner, the first terminal device determines the second frequency position according to the above-mentioned condition 1 or condition 2. The second terminal device determines the second frequency position according to the above-mentioned condition 1 or condition 2.

Step 303: The first terminal device performs time-frequency synchronization according to the second access signal.

It can be understood that, if the second terminal device receives the second access signal from the network device at the second frequency position, the second terminal device performs time-frequency synchronization according to the second access signal.

The process of time-frequency synchronization performed by the first terminal device and/or the second terminal device according to the second access signal may refer to the explanation in the conventional technology, and will not be repeated.

Based on the method shown in FIG. 3 , the network device may determine a first frequency position that can be used to transmit the first access signal, and determine a second frequency position according to one of the first frequency positions, and at the second frequency position A second access signal whose occupied bandwidth is smaller than that occupied by the first access signal is sent. In this way, a terminal device with a smaller bandwidth (eg, the first terminal device) can use the same method as the network device to determine the second frequency position, receive the second access signal at the second frequency position, and then communicate with the network device.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, the above-mentioned network device or the first terminal device, etc., includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that the unit and algorithm operations of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware 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.

In this embodiment of the present application, the network device or the first terminal device may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. middle. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

For example, in the case of dividing each functional module in an integrated manner, FIG. 10 shows a schematic structural diagram of a communication apparatus 100 . Exemplarily, the communication apparatus 100 is, for example, a network device. Exemplarily, the network device is, for example, the network device described in the embodiment shown in FIG. 3 .

The communication device 100 includes a processing module 1001 and a transceiver module 1002 . Exemplarily, the communication apparatus 100 may be a network device, or may be a chip applied in the network device or other combined devices, components and the like having the functions of the above-mentioned network device. When the communication apparatus 100 is a network device, the processing module 1001 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs, and the transceiver module 1002 may be a transceiver. It can include antennas and radio frequency circuits, etc. When the communication apparatus 100 is a component having the above-mentioned network equipment function, the processing module 1001 may be a processor (or a processing circuit), such as a baseband processor, and the transceiver module 1002 may be a radio frequency unit. When the communication device 100 is a chip system, the processing module 1001 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units, and the transceiver module 1002 may be the input and output of a chip (eg, a baseband chip). interface. It should be understood that the processing module 1001 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or referred to as a processing circuit), and the transceiver module 1002 may be implemented by a transceiver or a transceiver-related circuit component.

For example, the processing module 1001 may be configured to perform all operations performed by the network device in the embodiment shown in FIG. 3 except for the transceiving operations, such as step 301, and/or other processes for supporting the techniques described herein . Transceiver module 1002 may be used to perform all transceiving operations performed by network devices in the embodiment shown in FIG. 3, such as step 302, and/or other processes for supporting the techniques described herein.

The processing module 1001 is configured to determine a first frequency location that can be used to send the first access signal. The first frequency locations include one or more frequency locations, and a third frequency location of the first frequency locations is used to transmit the first access signal.

The transceiver module 1002 is configured to send the second access signal at the second frequency position. The bandwidth occupied by the first access signal in the frequency domain is greater than the bandwidth occupied by the second access signal in the frequency domain, the third frequency position and the second frequency position are located at different positions in the same frequency band, and the second frequency position is the same as the second frequency position. At least one of the first frequency positions satisfies the set condition.

or;

The processing module 1001 is used for determining the second frequency position.

The transceiver module 1002 is configured to send the second access signal at the second frequency position.

For other functions that can be implemented by the communication device 100, reference may be made to the relevant introduction of the embodiment shown in FIG. 3, and details are not repeated.

Since the communication apparatus 100 provided in this embodiment can execute the above-mentioned method for sending an access signal, reference can be made to the above-mentioned method embodiments for technical effects that can be obtained, and details are not repeated here.

For example, in the case of dividing each functional module in an integrated manner, FIG. 11 shows a schematic structural diagram of a communication apparatus 110 . Exemplarily, the communication apparatus 110 is, for example, a first terminal device. Exemplarily, the first terminal device is, for example, the first terminal device described in the embodiment shown in FIG. 3 .

The communication device 110 includes a transceiver module 1101 and a processing module 1102 . Exemplarily, the communication apparatus 110 may be a first terminal device, or may be a chip applied in the first terminal device, or other combined devices, components, etc. having the functions of the above-mentioned first terminal device. When the communication apparatus 110 is the first terminal device, the transceiver module 1101 may be a transceiver, and the transceiver may include an antenna, a radio frequency circuit, and the like. The processing module 1102 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs. When the communication apparatus 110 is a component having the function of the above-mentioned first terminal device, the transceiver module 1101 may be a radio frequency unit. The processing module 1102 may be a processor (or, processing circuit), such as a baseband processor. When the communication device 110 is a chip system, the transceiver module 1101 may be an input and output interface of a chip (eg, a baseband chip). The processing module 1102 may be a processor (or, a processing circuit) of a system on a chip, and may include one or more central processing units. It should be understood that the transceiver module 1101 may be implemented by a transceiver or a transceiver-related circuit component, and the processing module 1102 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component (or referred to as a processing circuit).

For example, the transceiving module 1101 may be used to perform all transceiving operations performed by the first terminal device in the embodiment shown in FIG. 3 , such as step 302 , and/or other processes used to support the techniques described herein. The processing module 1102 may be configured to perform all operations performed by the network device in the embodiment shown in FIG. 3 except for the transceiving operations, such as step 303, and/or other processes for supporting the techniques described herein.

The transceiver module 1101 is configured to receive the second access signal from the network device at the second frequency position.

The processing module 1102 is configured to perform time-frequency synchronization according to the second access signal. The communication device 110 is a second type terminal device, or a module in the second type terminal device, such as a chip, the bandwidth of the second type terminal device is smaller than that of the first type terminal device, and the second access signal is in the frequency domain. The bandwidth occupied by the first access signal is smaller than the bandwidth occupied by the first access signal in the frequency domain. The first access signal is a signal that the network device can send to the first type of terminal device at the first frequency position, and the first frequency position includes one or a plurality of frequency positions, the third frequency position in the first frequency position is used for transmitting the first access signal, the third frequency position and the second frequency position are located at different positions in the same frequency band, and the second frequency position and the first frequency position At least one frequency position in satisfies the set condition.

or;

The processing module 1102 is configured to determine the second frequency position.

The transceiver module 1101 is used to receive the second access signal from the network device at the second frequency position.

The processing module 1102 is further configured to perform time-frequency synchronization according to the second access signal.

For other functions that can be implemented by the communication device 110 , reference may be made to the related introduction of the embodiment shown in FIG. 3 , and details are not repeated here.

Since the communication apparatus 110 provided in this embodiment can execute the above-mentioned method for sending an access signal, the technical effect that can be obtained can be referred to the above-mentioned method embodiments, which will not be repeated here.

Figure 12 shows a schematic diagram of the composition of a communication system. As shown in Figure 12, the communication system 120 may include: a network device 1201 and a terminal device 1202. It should be noted that FIG. 12 is only an exemplary drawing, and the embodiment of the present application does not limit the network elements and the number of network elements included in the communication system 120 shown in FIG. 12 .

The network device 1201 has the function of the communication apparatus shown in FIG. 10, and can be used to determine a first frequency position that can be used to send the first access signal, and send the second access signal at the second frequency position.

The terminal device 1202 has the function of the communication device shown in FIG. 11, and can be used to receive the second access signal from the network device at the second frequency position, and perform time-frequency synchronization according to the second access signal.

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding network element of the communication system 120, and details are not repeated here.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, 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 shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . 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 above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. . Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (34)

1. A method for sending an access signal, wherein the method is applied to a first communication system, and the method includes:

   The network device determines a first frequency location that can be used to transmit the first access signal, the first frequency location includes one or more frequency locations, and a third frequency location of the first frequency locations is used to transmit the first frequency location. an access signal;

   The network device determines a second frequency location, and sends a second access signal on the second frequency location;

   Wherein, the bandwidth occupied by the first access signal in the frequency domain is greater than the bandwidth occupied by the second access signal in the frequency domain, and the third frequency position and the second frequency position are located in the same frequency band. position, and at least one of the second frequency position and the first frequency position satisfies a set condition.
2. The method according to claim 1, wherein a frequency interval between the third frequency position and the second frequency position is greater than or equal to the bandwidth occupied by the first access signal in the frequency domain and the half of the sum of the bandwidths occupied by the second access signal in the frequency domain.
3. The method according to claim 1 or 2, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ -O;

   Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ;

   Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
4. The method according to claim 1 or 2, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O+Δ, and/or, f ₂ = f ₁ -O-Δ;

   Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, Δ is greater than 0, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2* scs ₂ ;

   Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
5. The method according to claim 4, wherein the Δ is greater than or equal to the fourth frequency position corresponding to the first access signal and the fifth frequency corresponding to the control resource set indicated by the first access signal Frequency spacing between locations.
6. The method according to any one of claims 3-5, wherein,

   The first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 1, and An integer less than 2499, M is 1, 3 or 5, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 1 and less than or equal to 2499, M is 1, 3 or 5; or,

   The first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0 and less than An integer of 14756, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 14756; or,

   The first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0, and An integer less than 4383, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 4383.
7. The method according to any one of claims 1-6, wherein the second frequency position is a frequency position of subcarrier k ₂ in the subcarriers occupied by the second access signal, wherein k ₂ is the number of the subcarrier occupied by the second access signal, and k ₂ satisfies:

   

   or

   

   K ₂ is the number of subcarriers occupied by the second access signal.
8. The method according to any one of claims 1-7, wherein the first access signal and the second access signal are adjacent in the frequency domain.
9. A method for receiving an access signal, wherein the method is applied to a first communication system, and the method includes:

   The first terminal device determines a second frequency position, and receives a second access signal from the network device at the second frequency position;

   The first terminal device performs time-frequency synchronization according to the second access signal;

   The first terminal device is a second type terminal device, the bandwidth of the second type terminal device is smaller than the bandwidth of the first type terminal device, and the bandwidth occupied by the second access signal in the frequency domain is smaller than that of the first type terminal device. Bandwidth occupied by an access signal in the frequency domain, the first access signal is a signal that the network device can send to the first type terminal device at a first frequency position, where the first frequency position includes a or a plurality of frequency locations, a third frequency location of the first frequency locations is used to transmit the first access signal, the third frequency location and the second frequency location are located at different locations in the same frequency band, and At least one of the second frequency position and the first frequency position satisfies a set condition.
10. The method according to claim 9, wherein a frequency interval between the third frequency position and the second frequency position is greater than or equal to the frequency between the bandwidth occupied by the first access signal in the frequency domain and the half of the sum of the bandwidths occupied by the second access signal in the frequency domain.
11. The method according to claim 9 or 10, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ -O;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
12. The method according to claim 9 or 10, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O+Δ, and/or, f ₂ = f ₁ -O-Δ;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, Δ is greater than 0, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2* scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
13. The method according to claim 12, wherein the Δ is greater than or equal to the fourth frequency position corresponding to the first access signal and the fifth frequency corresponding to the control resource set indicated by the first access signal Frequency spacing between locations.
14. The method according to any one of claims 11-13, wherein,

    The first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 1, and An integer less than 2499, M is 1, 3 or 5, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 1 and less than or equal to 2499, M is 1, 3 or 5; or,

    The first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0 and less than An integer of 14756, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 14756; or,

    The first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0, and An integer less than 4383, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 4383.
15. The method according to any one of claims 9-14, wherein the second frequency position is a frequency position of subcarrier k ₂ in the subcarriers occupied by the second access signal, wherein k ₂ is the number of the subcarrier occupied by the second access signal, and k ₂ satisfies:

    

    or

    

    K ₂ is the number of subcarriers occupied by the second access signal.
16. The method according to any one of claims 9-15, wherein the first access signal and the second access signal are adjacent in the frequency domain.
17. A communication device, characterized in that the communication device is applied to a first communication system, and the communication device comprises: a processing module and a transceiver module;

    The processing module is configured to determine a first frequency position that can be used to send a first access signal, the first frequency position includes one or more frequency positions, and a third frequency position in the first frequency position is for sending the first access signal;

    the processing module is further configured to determine the second frequency position;

    the transceiver module, configured to send a second access signal at the second frequency position;

    Wherein, the bandwidth occupied by the first access signal in the frequency domain is greater than the bandwidth occupied by the second access signal in the frequency domain, and the third frequency position and the second frequency position are located in the same frequency band. position, and at least one of the second frequency position and the first frequency position satisfies a set condition.
18. The communication device according to claim 17, wherein a frequency interval between the third frequency position and the second frequency position is greater than or equal to the bandwidth occupied by the first access signal in the frequency domain and Half of the sum of the bandwidths occupied by the second access signal in the frequency domain.
19. The communication device according to claim 17 or 18, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ -O;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
20. The communication device according to claim 17 or 18, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O+Δ, and/or f ₂ =f ₁ -O-Δ;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, Δ is greater than 0, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2* scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
21. The communication device according to claim 20, wherein the Δ is greater than or equal to the fourth frequency position corresponding to the first access signal and the fifth frequency position corresponding to the control resource set indicated by the first access signal Frequency spacing between frequency locations.
22. The communication device according to any one of claims 19-21, characterized in that,

    The first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 1, and An integer less than 2499, M is 1, 3 or 5, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 1 and less than or equal to 2499, M is 1, 3 or 5; or,

    The first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0 and less than An integer of 14756, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 14756; or,

    The first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0, and An integer less than 4383, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 4383.
23. The communication device according to any one of claims 17-22, wherein the second frequency position is a frequency position of subcarrier k ₂ in the subcarriers occupied by the second access signal, wherein, k ₂ is the number of the subcarrier occupied by the second access signal, and k ₂ satisfies:

    

    or

    

    K ₂ is the number of subcarriers occupied by the second access signal.
24. The communication apparatus according to any one of claims 17-23, wherein the first access signal and the second access signal are adjacent in a frequency domain.
25. A communication device, characterized in that the communication device is applied to a first communication system, and the communication device comprises: a transceiver module and a processing module;

    the processing module, for determining the second frequency position;

    the transceiver module, configured to receive a second access signal from a network device at the second frequency position;

    Wherein, the communication device is a second type of terminal equipment, the bandwidth of the second type of terminal equipment is smaller than the bandwidth of the first type of terminal equipment, and the bandwidth occupied by the second access signal in the frequency domain is smaller than that of the first access signal The bandwidth occupied by a signal in the frequency domain, the first access signal is a signal that the network device can send to the first type terminal device at a first frequency position, where the first frequency position includes one or more frequency positions, a third frequency position of the first frequency positions is used for transmitting the first access signal, the third frequency position and the second frequency position are located at different positions in the same frequency band, and the At least one of the second frequency position and the first frequency position satisfies a set condition;

    The processing module is further configured to perform time-frequency synchronization according to the second access signal.
26. The communication device according to claim 25, wherein a frequency interval between the third frequency position and the second frequency position is greater than or equal to the bandwidth occupied by the first access signal in the frequency domain and Half of the sum of the bandwidths occupied by the second access signal in the frequency domain.
27. The communication device according to claim 25 or 26, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O, and/or, f ₂ =f ₁ -O;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2*scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
28. The communication device according to claim 25 or 26, wherein a formula is satisfied between the first frequency position and the second frequency position: f ₂ =f ₁ +O+Δ, and/or, f ₂ =f ₁ -O-Δ;

    Wherein, f ₁ is one of the first frequency positions, f ₂ is the second frequency position, Δ is greater than 0, and O satisfies the formula: O=K ₁ /2*scs ₁ +K ₂ /2* scs ₂ ;

    Wherein, K ₁ is the number of sub-carriers occupied by the first access signal, scs ₁ is the sub-carrier spacing of the sub-carriers occupied by the first access signal, and K ₂ is the number of sub-carriers occupied by the second access signal The number of subcarriers, scs ₂ is the subcarrier spacing of the subcarriers occupied by the second access signal.
29. The communication device according to claim 28, wherein the Δ is greater than or equal to the fourth frequency position corresponding to the first access signal and the fifth frequency position corresponding to the control resource set indicated by the first access signal Frequency spacing between frequency locations.
30. The communication device according to any one of claims 27-29, characterized in that,

    The first frequency position satisfies the formula: f ₁ =N*1200kHz+M*50kHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 1, and An integer less than 2499, M is 1, 3 or 5, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 1 and less than or equal to 2499, M is 1, 3 or 5; or,

    The first frequency position satisfies the formula: f ₁ =3000MHz+N*1.44MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0 and less than An integer of 14756, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 14756; or,

    The first frequency position satisfies the formula: f ₁ =24250.08MHz+N*17.28MHz; in the case of f ₂ =f ₁ +O, or f ₂ =f ₁ +O+Δ, N is greater than or equal to 0, and An integer less than 4383, in the case of f ₂ =f ₁ -O, or f ₂ =f ₁ -O-Δ, N is an integer greater than 0 and less than or equal to 4383.
31. The communication device according to any one of claims 25-30, wherein the second frequency position is a frequency position of subcarrier k ₂ in the subcarriers occupied by the second access signal, wherein, k ₂ is the number of the subcarrier occupied by the second access signal, and k ₂ satisfies:

    

    or

    

    K ₂ is the number of subcarriers occupied by the second access signal.
32. The communication device according to any one of claims 25-31, wherein the first access signal and the second access signal are adjacent in a frequency domain.
33. A communication device, characterized in that it comprises: a processor coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is executed by the processor, the device causes the device A method as claimed in any one of claims 1 to 8 is performed, or a method as claimed in any one of claims 9 to 16 is performed.
34. A computer-readable medium on which a computer program or instruction is stored, characterized in that, when the computer program or instruction is executed, the computer executes the method according to any one of claims 1 to 8 or the method as claimed in claim 1. The method of any one of 9 to 16.

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