WO2022246806A1

WO2022246806A1 - Cell search method, communication apparatus, readable storage medium, and chip system

Info

Publication number: WO2022246806A1
Application number: PCT/CN2021/096809
Authority: WO
Inventors: 何艺; 杨帆; 冯坤
Original assignee: 华为技术有限公司
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-12-01
Also published as: CN115699880A

Abstract

A cell search method, a communication apparatus, a readable storage medium, and a chip system, used for shortening the cell search time and improving the network searching speed. In the present application, a wireless communication apparatus performs cell search on a first candidate frequency point in a first frequency band on the basis of a first subcarrier spacing type and a second subcarrier spacing type, the first candidate frequency point comprising a first frequency point in the first frequency band, and the first frequency point being an overlapping frequency point in the first frequency band and a second frequency band; when the access to a network by means of a cell corresponding to the first candidate frequency point fails, the cell search is performed on a second candidate frequency point in the second frequency band on the basis of the first subcarrier spacing type, wherein the second candidate frequency point does not comprise a first frequency point in the second frequency band. The second candidate frequency point in the second frequency band does not comprise a first frequency point, so that the secondary cell search can be protected from performing on the overlapping first frequency point on the basis of the first subcarrier spacing, and thus the network searching speed can be accelerated, and the network searching time is shortened.

Description

A cell search method, communication device, readable storage medium and chip system

technical field

The present application relates to the technical field of communication, and in particular to a cell search method, a communication device, a readable storage medium and a chip system.

Background technique

When the terminal device is powered on or has no service, it needs to search the network and obtain network signals to complete the network registration of the terminal device. Usually, when a terminal device is searching for a network, it first scans the frequency band corresponding to the last registered network stored in the terminal device (which can be called a priori frequency point). search. If a cell is found, try to access the network through this cell. If no cell is found on the prior frequency points or the network is not successfully accessed through the cell, a full frequency band search is required, that is, frequency band scanning and cell search are performed on all frequency bands supported by the terminal device, so that the terminal device can pass the search The cell to be connected to the network in order to provide services for users.

In the prior art, for two frequency bands with overlapping frequency ranges, if the frequency point configuration information of the two frequency bands is the same, that is, the frequency points of the two frequency bands have the same step size on the synchronization grid sequence, and the two frequency points The subcarrier spacing types corresponding to the frequency points of the frequency bands are also the same, so the frequency bands with overlapping frequency ranges can be deduplicated during the full frequency band search. That is, scanning and cell search are performed on frequency bands within the overlapping range without overlapping, thereby speeding up the network search process.

However, with the development of 5G, two frequency ranges FR1 and FR2 are defined. FR1 (410MHz-7125MHz) is usually called Sub6GHz, FR2 (24250MHz-52600MHz) is usually called millimeter wave (Millimeter Wave), and there are more than 40 working frequency bands in total. And considering the wireless resource planning situation of different countries in the world, there may be overlapping frequency ranges among the multiple frequency bands supported by the terminal equipment. On the other hand, NR technology introduces the concept of Numerology. A frequency point corresponding to a synchronization signal block (SSB) can be configured with multiple sub-carrier space types (SCS Type). And for two frequency bands with overlapping frequency ranges, the step sizes of the frequency points of the two frequency bands on the synchronization raster sequence may also be different, which will cause overlapping frequency points in the frequency bands where the two frequency ranges overlap , there are also non-overlapping frequency points.

For two frequency bands with overlapping frequency ranges, if the frequency point configuration information of the two frequency bands is different, the terminal device needs to perform frequency band scanning and cell search for the area where the frequency range overlaps for each frequency band. Internet time is too long. It can be seen that how to improve the speed of searching the Internet has become an urgent problem to be solved.

Contents of the invention

The present application provides a cell search method, a communication device, a readable storage medium and a chip system, which are used to shorten the cell search time and improve the network search speed.

It should be understood that in the solutions provided by the embodiments of the present application, the wireless communication device may be a wireless communication device, or may be a part of the wireless communication device, such as an integrated circuit product such as a system chip or a communication chip. A wireless communication device may be a computer device supporting a wireless communication function.

Specifically, the wireless communication device may be a terminal such as a smart phone. A system chip can also be called a system on chip (system on chip, SoC), or simply a SoC chip. Communication chips may include baseband processing chips and radio frequency processing chips. Baseband processing chips are also sometimes referred to as modems or baseband chips. RF processing chips are sometimes also referred to as RF transceivers or RF chips. In physical implementation, part or all of the chips in the communication chip can be integrated inside the SoC chip. For example, the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.

In a first aspect, the present application provides a cell search method, which can be executed by a wireless communication device. In this method, the wireless communication device performs a cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, and the first candidate frequency point includes the first frequency point in the first frequency band. Frequency point, the first frequency point is a frequency point among the overlapping frequency points of the first frequency band and the second frequency band. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band, and the second candidate frequency does not include the second The first frequency point in the frequency band.

Since the first frequency point is an overlapping frequency point of the first frequency band and the second frequency band, and in the process of cell search for the frequency point of the first frequency band, the first frequency point has been searched based on the first subcarrier spacing, Therefore, in the process of cell search for the frequency points in the second frequency band, cell search is no longer performed on the first frequency point based on the first subcarrier interval, so that the overlapping first frequency point based on the first subcarrier interval can be avoided. The cell search is performed twice at intervals, thereby speeding up the search speed and shortening the search time.

In a possible implementation manner, before performing cell search on the first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, the wireless communication device further includes: performing a priori frequency Click to search the area. The wireless communication device performs a cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, including: when the cell corresponding to the prior frequency point fails to access the network Next, the wireless communication device performs cell search on the first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type. In this way, the terminal device can first try to access the network through a priori frequency point, and if it fails, the full-band scanning mode is turned on. When the full-band scanning mode is turned on, for the frequency bands supported by the terminal device, one frequency band is scanned. In this way, It can improve the speed at which the terminal device successfully accesses the network.

In a possible implementation manner, the first candidate frequency point further includes a second frequency point, and the second frequency point is a frequency in a frequency point in the first frequency band other than the overlapping frequency point. point. In this way, at the stage of performing cell search on frequency points in the first frequency band, cell search can also be performed on the second frequency point based on the first subcarrier spacing type and the second subcarrier spacing type, thereby improving the success of wireless communication devices in accessing the speed of the network.

In a possible implementation manner, the second candidate frequency point further includes a third frequency point, and the third frequency point is a frequency in a frequency point other than the overlapping frequency point in the second frequency band. point. In this way, at the stage of performing cell search on the frequency points of the second frequency band, cell search may also be performed on the third frequency point based on the first subcarrier spacing type, so that the speed at which the wireless communication device successfully accesses the network can be improved.

In a possible implementation manner, the subcarrier spacing type corresponding to the frequency point of the first frequency band includes: a first subcarrier spacing type and a second subcarrier spacing type. In this way, one frequency band can correspond to multiple subcarrier intervals, thereby improving resource utilization. In a possible implementation manner, the subcarrier spacing type corresponding to the frequency point of the second frequency band includes: a first subcarrier spacing type. In this way, for two frequency bands with overlapping frequency points, one of the subcarrier spacing types corresponding to the two frequency bands has the same subcarrier spacing type. Based on this, the frequency points can be screened at the granularity of the subcarrier spacing type, In this way, the speed of searching the Internet can be further accelerated. And compared with a possible solution, in this solution, only a certain frequency point can be screened out, that is, the frequency point search is not performed on the frequency point, or the cell search is not performed on the frequency point, and the granularity of the search is always maintained at the frequency point or frequency band In this application, for a certain frequency point, it can be screened again based on its configuration information (including the subcarrier spacing type corresponding to the frequency point), and it can be selected for which configuration information to perform the cell search stage for the frequency point. Cell search is performed, and cell search is not performed for which configuration information. It can be seen that the screening granularity is smaller, which can further increase the search speed.

In yet another possible implementation manner, the subcarrier spacing types corresponding to the frequency points of the first frequency band are: a first subcarrier spacing type and a second subcarrier spacing type. The subcarrier spacing type corresponding to the frequency point of the second frequency band is: the first subcarrier spacing type. In this way, the existing technology can be more compatible.

In a possible implementation manner, the first step size corresponding to the first frequency band on the synchronization raster sequence is different from the second step size corresponding to the second frequency band on the synchronization raster sequence. In this way, when there is an overlapping area between the first frequency band and the second frequency band, if the step sizes of the two frequency bands are different, the frequency points of the two frequency bands in the overlapping area are not exactly the same. The practice of deleting the overlapping area in the first frequency band or the second frequency band, in this way, some frequency points will be missed. Based on this relatively complicated situation, the above-mentioned solution can be adopted in this application, and the granularity of frequency points can be screened according to their configuration information, so that the speed of network search can be further improved.

In a possible implementation manner, the first subcarrier spacing type is 15 KHz. The second subcarrier spacing type is 30KHz. In this way, the existing technology can be more compatible.

In a possible implementation manner, the first frequency band is part or all of the frequency band corresponding to band41; the second frequency band is part or all of the frequency band corresponding to band38. In this way, the existing technology can be more compatible.

In a second aspect, the present application provides a cell search method, which can be executed by a wireless communication device.

In this method, the wireless communication device performs cell search on the first frequency point among the first candidate frequency points of the first frequency band based on the second subcarrier spacing type; the first frequency point is the overlapping frequency of the first frequency band and the second frequency band The frequency point in the point; the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type; the subcarrier spacing type corresponding to the frequency point of the second frequency band includes the first subcarrier spacing type interval type. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band. The second candidate frequency includes the first frequency point. Although the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type, since the first frequency point is an overlapping frequency point between the first frequency band and the second frequency band, and for In the process of cell search for the frequency point in the first frequency band, the cell search is only performed on the first frequency point based on the second subcarrier interval, and the cell search is not performed on the first frequency point based on the first subcarrier interval. In the process of cell search for the frequency points in the second frequency band, the first frequency point needs to be searched based on the first subcarrier spacing, so as to avoid the overlapping of the first frequency point twice based on the first subcarrier spacing Community search, which in turn can speed up the search speed and shorten the search time.

In a possible implementation manner, the first candidate frequency point further includes a second frequency point. The second frequency point is a frequency point in the first frequency band except a frequency point overlapping with a frequency point in the second frequency band. Based on the first subcarrier spacing type, before performing cell search on the second candidate frequency points in the second frequency band, it also includes: based on the first subcarrier spacing type and the second subcarrier spacing type, performing cell search on the first candidate frequency points Cell search is performed at the second frequency point. It can be seen that, in the process of cell search, the frequency points other than the first frequency point in the first frequency band still need to be searched according to the first subcarrier spacing type and the second subcarrier spacing type, so that it can prevent missed search.

In a possible implementation manner, before performing the cell search on the first frequency point among the first candidate frequency points in the first frequency band based on the second subcarrier spacing type, the method further includes: performing cell search on the prior frequency point. The wireless communication device performs cell search on the first frequency point among the first candidate frequency points in the first frequency band based on the second subcarrier spacing type, including: in the case that the cell corresponding to the prior frequency point fails to access the network, The wireless communication device performs cell search on a first frequency point among first candidate frequency points in the first frequency band based on the second subcarrier spacing type. In this way, the terminal device can first try to access the network through a priori frequency point, and if it fails, the full-band scanning mode is turned on. When the full-band scanning mode is turned on, for the frequency bands supported by the terminal device, one frequency band is scanned. In this way, It can improve the speed at which the terminal device successfully accesses the network.

In a possible implementation manner, the first subcarrier spacing type is 15KHz; the second subcarrier spacing type is 30KHz. In this way, the existing technology can be more compatible.

In a third aspect, a wireless communication device is provided, including a communication unit and a processing unit, so as to execute any implementation manner of any communication method in the first aspect to the second aspect above. The communication unit is used to perform functions related to transmission and reception. Optionally, the communication unit includes a receiving unit and a sending unit. In one design, the wireless communication device is a communication chip, the processing unit may be one or more processors or processor cores, and the communication unit may be an input/output circuit or port of the communication chip.

In another design, the communication unit may be a transmitter and a receiver, or the communication unit may be a transmitter and a receiver.

Optionally, the wireless communication device further includes various modules that can be used to implement any implementation manner of any communication method in the first aspect above.

In a fourth aspect, a wireless communication device is provided, including a processor and a memory. Optionally, a transceiver is also included, the memory is used to store computer programs or instructions, the processor is used to call and run the computer programs or instructions from the memory, and when the processor executes the computer programs or instructions in the memory, the The wireless communication device executes any implementation manner of any communication method from the first aspect to the second aspect above.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

Optionally, the transceiver may include a transmitter (transmitter) and a receiver (receiver).

In a fifth aspect, a wireless communication device is provided, including a processor. The processor is coupled with the memory, and can be used to execute any one of the first aspect to the second aspect, and the method in any possible implementation manner of any one aspect. Optionally, the wireless communication device further includes a memory. Optionally, the wireless communication device further includes a communication interface, and the processor is coupled to the communication interface.

In an implementation manner, when the wireless communication apparatus is a wireless communication device, the communication interface may be a transceiver, or an input/output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In yet another implementation, when the wireless communication device is a chip or a chip system, the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system Wait. A processor may also be embodied as processing circuitry or logic circuitry.

In a sixth aspect, a system is provided, and the system includes the wireless communication apparatus and network equipment described above.

In a seventh aspect, a computer program product is provided, and the computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is run, causes the computer to execute any one of the possible implementations in the first aspect above. The method in the manner, or causing the computer to execute the method in any implementation manner of the second aspect above.

In an eighth aspect, a computer-readable storage medium is provided, and the computer-readable medium stores a computer program (also referred to as code, or an instruction) which, when run on a computer, causes the computer to execute any one of the above-mentioned first aspects. the method in one possible implementation manner, or cause the computer to execute the method in any one implementation manner of the second aspect above.

In a ninth aspect, a chip system is provided, and the chip system may include a processor. The processor is coupled with the memory, and can be used to execute any one of the first aspect to the second aspect, and the method in any possible implementation manner of any one aspect. Optionally, the chip system further includes a memory. Memory, used to store computer programs (also called code, or instructions). The processor is configured to call and run the computer program from the memory, so that the device installed with the system-on-a-chip executes any one of the first aspect to the second aspect, and the method in any possible implementation manner of any one aspect.

In a tenth aspect, a wireless communication device is provided, including: an interface circuit and a processing circuit. Interface circuitry may include input circuitry and output circuitry. The processing circuit is used to receive signals through the input circuit and transmit signals through the output circuit, so that any one of the first aspect to the second aspect, and the method in any possible implementation manner of any aspect are realized.

In a specific implementation process, the above-mentioned processing device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example but not limited to, the receiver, the output signal of the output circuit may be, for example but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and the output The circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times. The embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.

In an implementation manner, when the wireless communication device is a wireless communication device, the wireless communication device may be a terminal such as a smart phone. The interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device.

In yet another implementation manner, the wireless communication device may be a part of a wireless communication device, such as an integrated circuit product such as a system chip or a communication chip. The interface circuit may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system. The processing circuitry may be logic circuitry on the chip.

Description of drawings

FIG. 1 is a schematic diagram of a possible system architecture applicable to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an SSB provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a wireless communication device provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a cell search method provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another wireless communication device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another wireless communication device provided by an embodiment of the present application;

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

FIG. 9 is a schematic structural diagram of another wireless communication device provided by an embodiment of the present application.

Detailed ways

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

The embodiments of the present application may be applicable to wireless communication systems. The wireless communication system may comply with the wireless communication standard of the third generation partnership project (3GPP), and may also comply with other wireless communication standards, such as the 802 standard of the Institute of Electrical and Electronics Engineers (IEEE). A family of wireless communication standards such as 802.11, 802.15, or 802.20.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System for Mobile Communications (Global System for Mobile Communications, GSM), Code Division Multiple Access (Code Division Multiple Access, CDMA), General Packet Radio Service (General packet radio service, GPRS), GSM enhanced data rate evolution (Enhanced Data rates for GSM Evolution, EDGE), interim standard 95 code division multiple access (Interim Standard95CDMA, IS-95CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), CDMA2000, Time Division Synchronous Code Division Multiple Access (TD-SCDMA), LTE, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access, WiMAX) communication systems, as well as 5G communication systems and future communication systems, etc. Among them, LTE includes Time Division Duplex LTE (LTE TDD, or TD-LTE) and Frequency Division Duplex LTE (LTE FDD).

In a wireless communication system, devices can be divided into devices that provide wireless network services and devices that use wireless network services. Devices that provide wireless network services refer to those devices that make up a wireless communication network, which can be referred to as network equipment or network elements for short. Network equipment usually belongs to operators or infrastructure providers and is operated or maintained by these vendors. Network equipment can be further divided into radio access network (radio access network, RAN) equipment and core network (core network, CN) equipment. Typical RAN equipment includes a base station (base station, BS).

It should be understood that sometimes the base station may also be called a wireless access point (access point, AP), or a transmission reception point (transmission reception point, TRP). Specifically, the base station may be a general node B (generation Node B, gNB) in a 5G new radio (new radio, NR) system, or an evolved node B (evolutional Node B, eNB) in a 4G long term evolution (long term evolution, LTE) system. ). According to the physical form or transmission power of the base station, the base station can be divided into a macro base station or a micro base station. Micro base stations are also sometimes referred to as small base stations or small cells.

A device using a wireless network service may be referred to as a terminal for short. The terminal can establish a connection with the network equipment, and provide users with specific wireless communication services based on the services of the network equipment. It should be understood that, because the relationship between the terminal and the user is closer, it is sometimes called user equipment (user equipment, UE), or a subscriber unit (subscriber unit, SU). In addition, compared with the base station usually placed in a fixed location, the terminal often moves with the user, and is sometimes called a mobile station (mobile station, MS). In addition, some network devices, such as a relay node (relay node, RN) or a wireless router, etc., can sometimes be considered as terminals because they have a UE identity or belong to a user.

Specifically, the terminal can be a mobile phone (mobile phone), a tablet computer (tablet computer), a laptop computer (laptop computer), a wearable device (such as a smart watch, a smart bracelet, a smart helmet, smart glasses), and other Devices with wireless access capabilities, such as smart cars, various Internet of things (IOT) devices, including various smart home devices (such as smart meters and smart home appliances) and smart city devices (such as security or monitoring equipment, Intelligent road traffic facilities), etc.

For ease of expression, in the embodiments of the present application, base stations and terminal equipment will be taken as examples to describe the technical solutions of the embodiments of the present application in detail.

FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application. As shown in FIG. 1 , a wireless communication system includes a terminal device 103 and a base station (such as a base station 101 and a base station 102 ). According to different transmission directions, a transmission link from a terminal device to a base station is marked as an uplink (uplink, UL), and a transmission link from a base station to a terminal device is marked as a downlink (downlink, DL). Similarly, data transmission in the uplink may be abbreviated as uplink data transmission or uplink transmission, and data transmission in the downlink may be abbreviated as downlink data transmission or downlink transmission.

In the wireless communication system, a base station, such as a base station, can provide communication coverage for a specific geographical area through an integrated or external antenna device. One or more terminal devices within the communication coverage of the base station can access the base station. One base station can manage one or more cells. Each cell has an identification (identification), which is also called a cell identity (cell ID). From the perspective of radio resources, a cell is a combination of downlink radio resources and its paired uplink radio resources (not necessary).

Although only two base stations and one terminal device are shown in FIG. 1, the wireless communication system may also include other numbers of terminal devices and base stations. In addition, the wireless communication system may also include other base stations, such as core network equipment, which will not be described one by one here.

Terminal equipment and base stations should know the predefined configuration of the wireless communication system, including the radio access technology (radio access technology, RAT) supported by the system and the wireless resource configuration specified by the system, such as the basic configuration of the radio frequency band and carrier. The carrier is a frequency range that complies with system regulations. This frequency range can be jointly determined by the center frequency of the carrier (referred to as the carrier frequency) and the bandwidth of the carrier. The predefined configurations of these systems can be used as part of the standard protocol of the wireless communication system, or determined through the interaction between the terminal equipment and the base station. The content of relevant standard protocols may be pre-stored in the memory of terminal equipment and base stations, or embodied as hardware circuits or software codes of terminal equipment and base stations.

In this wireless communication system, the terminal equipment and the base station support one or more of the same RAT, such as 5G NR, 4G LTE, or the RAT of the future evolution system. Specifically, the terminal device and the base station use the same air interface parameters, coding scheme, modulation scheme, etc., and communicate with each other based on the wireless resources specified by the system.

Based on the foregoing, some terms and concepts involved in the embodiments of the present application are now introduced.

(1) Frequency band scanning.

The frequency band scanning process mentioned in the embodiment of this application may include: the terminal device scans the frequency bands supported by itself, and obtains at least one frequency point whose energy level meets the cell search conditions on the frequency band, or obtains the signal strength on the frequency band At least one frequency point that meets the preset value. The acquired at least one frequency point may also be called a frequency point sequence or a frequency point list, or may also be called an SSB frequency point sequence or an SSB frequency point list.

(2) Cell search.

The cell search process mentioned in the embodiment of this application may include: the terminal device receives data sent by the network device for a certain period of time at the frequency point, and decodes the data according to the preset subcarrier spacing type (for example, according to the subcarrier spacing type Determine the frame structure and cyclic prefix (cyclic prefix, CP) type of the signal), and determine the cell ID, time domain position and frequency domain position of the cell according to the solved signal.

When the cell ID, the time domain position and the frequency domain position of the cell are successfully determined, it may be called that the cell search is successful. When the cell ID, the time domain position and the frequency domain position of the cell are not successfully determined, it may be called a cell search failure, or a cell search failure. After the cell search is successful, the terminal device will select the master information block (master information block, MIB) and system information block (System Information Blocks, SIB) of the cell according to certain criteria, and initiate random access.

In the embodiment of the present application, the terminal device may perform frequency band scanning and cell search on multiple frequency bands, that is, perform frequency band scanning and cell search on each frequency band until it accesses the network through a cell.

(3) Subcarrier spacing type and synchronization signal block step spacing in NR partial frequency bands.

In a possible implementation manner, the terminal device searches for a synchronization signal on the slave data received from the frequency point during the cell search process. You can first use the primary synchronization signal PSS to find the time domain position of the cell and the

Then use the secondary synchronization signal SSS to confirm the cell's

Finally, the cell ID and time domain position can be obtained according to the preset formula, and then combined with the frequency point information to obtain the frequency domain position of the cell, then the cell search for the frequency point ends.

In the NR system, each synchronization signal and physical broadcast channel block (Synchronization Signal and Physical broadcast channel block, SSB) can occupy 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and OFDM symbols can also be written It is an OFDM symbol. Fig. 2 exemplarily shows a structural diagram of a SSB. As shown in Fig. 2, an SSB can usually be composed of a synchronization signal (the synchronization signal includes a primary synchronization signal (Primary Synchronization Signal, PSS) 201 and a secondary synchronization signal (Secondary Synchronization Signal , SSS) 202) and a physical broadcast channel block (Physical broadcast channel, PBCH) block 203.

NR technology introduces the concept of Numerology, and a frequency point corresponding to a synchronization signal block (SSB) can be configured with multiple sub-carrier space types (SCS Type). Table 1 below exemplarily shows an example of the subcarrier spacing type and the synchronization signal block step spacing of the NR part of the frequency band. The synchronization signal block step interval in the embodiment of the present application may also be referred to as the step size of the frequency point of the frequency band on the synchronization grid sequence.

Table 1 Frequency Band Synchronization Signal Raster (Applicable SS raster entries per operating band) (FR1)

Based on the above content, taking a wireless communication device as an example of a terminal device, FIG. 3 exemplarily shows a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may be the terminal device in the embodiment of the present application, such as the terminal device 103 in FIG. 1 , or may be the wireless communication device in the embodiment of the present application.

It should be understood that the illustrated terminal device is only one example, and that a terminal device may have more or fewer components than shown in the figures, may combine two or more components, or may have a different configuration of components . The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.

As shown in Figure 3, the terminal device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, Antenna 1, antenna 2, antenna 3, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, A camera 193, a display screen 194, and a subscriber identification module (subscriber identification module, SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an acceleration sensor 180E, a distance sensor 180F, a fingerprint sensor 180H, a touch sensor 180K, an ambient light sensor 180L and the like. Antenna 1 and antenna 2 are used as an example in FIG. 3 , and optionally, other antennas may also be included.

Each component of the terminal device is specifically introduced below in combination with FIG. 3 :

Processor 110 may include one or more processing units. Processors can be general-purpose processors or processors designed for specific domains. For example, the processor can be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a The central processing unit (central processor unit, CPU), can also be a network processor (network processor, NP), can also be a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (micro controller unit, MCU), it can also be a programmable logic device (programmable logic device, PLD) or other integrated chips. The processor can also be an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processing, ISP), an audio signal processor (audio signal processor (ASP), and an AI processor specially designed for artificial intelligence (AI) applications. AI processors include but are not limited to neural network processing unit (NPU), tensor processing unit (TPU) and processors called AI engines. Wherein, different processing units may be independent devices, or may be integrated in one or more processors. Wherein, the controller may be the nerve center and command center of the terminal device. The controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be called directly from the memory, thereby avoiding overlapping access, reducing the waiting time of the processor 110, and thus improving the efficiency of the system.

When the processor 110 integrates different devices, such as integrating a CPU and a GPU, the CPU and the GPU can cooperate to execute the method provided by the embodiment of the present application. Fast processing efficiency.

In some embodiments, processor 110 may include one or more interfaces. For example, the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transceiver ( Universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface , and/or a universal serial bus (universal serial bus, USB) interface, etc.

The charging management module 140 is configured to receive a charging input from a charger. Wherein, the charger may be a wireless charger or a wired charger.

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the display screen 194 , the camera 193 , and the wireless communication module 160 . The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (leakage, impedance). In some other embodiments, the power management module 141 may also be disposed in the processor 110 . In some other embodiments, the power management module 141 and the charging management module 140 may also be set in the same device.

The wireless communication function of the terminal device can be realized by the antenna 1, the antenna 2, the antenna 3, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

Antenna 1, antenna 2 and antenna 3 are used to transmit and receive electromagnetic wave signals. Each antenna in an end device can be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied on terminal equipment. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module 150 can receive electromagnetic waves through the antenna 1, and filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation. The mobile communication module 150 can also amplify the signals modulated by the modem processor, and convert them into electromagnetic waves through the antenna 1 for radiation. In some embodiments, at least part of the functional modules of the mobile communication module 150 may be set in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be set in the same device.

A modem processor may include a modulator and a demodulator. Wherein, the modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator sends the demodulated low-frequency baseband signal to the baseband processor for processing. The low-frequency baseband signal is passed to the application processor after being processed by the baseband processor. The application processor outputs sound signals through audio equipment (not limited to speaker 170A, receiver 170B, etc.), or displays images or videos through display screen 194 . In some embodiments, the modem processor may be a stand-alone device. In some other embodiments, the modem processor may be independent from the processor 110, and be set in the same device as the mobile communication module 150 or other functional modules.

In some embodiments, the antenna 1 of the terminal device is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the terminal device can communicate with the network and other devices through wireless communication technology. Wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband code division Multiple access (wideband code division multiple access, WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM , and/or IR technology, etc. GNSS can include global positioning system (global positioning system, GPS), global navigation satellite system (global navigation satellite system, GLONASS), Beidou satellite navigation system (beidou navigation satellite system, BDS), quasi-zenith satellite system (quasi-zenith) satellite system (QZSS) and/or satellite based augmentation systems (SBAS).

The terminal device realizes the display function through the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The terminal device can realize the shooting function through ISP, camera 193 , video codec, GPU, display screen 194 and application processor.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the terminal device. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. Such as saving music, video and other files in the external memory card.

The internal memory 121 may be used to store computer-executable program codes including instructions. The internal memory 121 may include an area for storing programs and an area for storing data. Wherein, the stored program area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.) and the like. The storage data area can store data (such as audio data, phone book, etc.) created during the use of the terminal device. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (universal flash storage, UFS) and the like. The processor 110 executes various functional applications and data processing of the terminal device by executing instructions stored in the internal memory 121 and/or instructions stored in the memory provided in the processor.

The terminal device can realize the audio function through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor. Such as music playback, recording, etc.

The keys 190 include a power key (or called a power key), a volume key, and the like. The key 190 may be a mechanical key. It can also be a touch button. The terminal device can receive key input and generate key signal input related to user settings and function control of the terminal device.

The indicator 192 can be an indicator light, and can be used to indicate charging status, power change, and can also be used to indicate messages, missed calls, notifications, and the like.

Although not shown in FIG. 3, the terminal device may also include a Bluetooth device, a positioning device, a flashlight, a miniature projection device, a near field communication (near field communication, NFC) device, etc., which will not be described in detail here.

FIG. 4 is a schematic structural diagram of a wireless communication device provided by an embodiment of the present application. The wireless communication device may be a terminal or a base station in this embodiment of the present application. As shown in Figure 4, the wireless communication device may include multiple components, for example: application subsystem, memory (memory), mass storage (massive storage), baseband subsystem, radio frequency integrated circuit (radio frequency integrated circuit, RFIC) , RF front end (radio frequency front end, RFFE) device, and antenna (antenna, ANT). These components can be coupled by various interconnecting buses or other electrical connections.

In FIG. 4 , ANT_1 represents the first antenna, ANT_N represents the Nth antenna, and N is a positive integer greater than 1. Tx represents the sending path, Rx represents the receiving path, and different numbers represent different paths. Each path can represent a signal processing channel. Wherein, FBRx represents a feedback receiving path, PRx represents a main receiving path, and DRx represents a diversity receiving path. HB means high frequency, LB means low frequency, both refer to the relative high and low frequencies. BB means baseband. It should be understood that the symbols and components in FIG. 4 are for illustrative purposes only, and are only used as a possible implementation manner, and this embodiment of the present application also includes other implementation manners. For example, a wireless communication device may include more or fewer paths, including more or fewer components.

Among them, the application subsystem can be used as the main control system or main computing system of the wireless communication device to run the main operating system and application programs, manage the software and hardware resources of the entire wireless communication device, and provide users with user interface. In addition, the application subsystem may also include driver software related to other subsystems (eg, baseband subsystem).

An application subsystem may include one or more processors. The multiple processors may be multiple processors of the same type, or may include a combination of multiple types of processors. The processor in FIG. 4 may be the processor in the aforementioned FIG. 3 . For the introduction of the processor, refer to the introduction of the processor in the aforementioned FIG. 3 , which will not be repeated here.

In Figure 4, radio frequency integrated circuits (including RFIC 1, and one or more optional RFIC 2) and radio frequency front-end devices can together form a radio frequency subsystem. According to the signal receiving or sending path, the RF subsystem can also be divided into RF receive path (RF receive path) and RF transmit path (RF transmit path). Wherein, the radio frequency receiving channel can receive the radio frequency signal through the antenna, process the radio frequency signal (such as amplifying, filtering and down-converting) to obtain the baseband signal, and transmit it to the baseband subsystem. The radio frequency transmission channel can receive the baseband signal from the baseband subsystem, process the baseband signal (such as up-converting, amplifying and filtering) to obtain a radio frequency signal, and finally radiate the radio frequency signal into space through the antenna. Radio frequency integrated circuits may be referred to as radio frequency processing chips or radio frequency chips.

Specifically, the radio frequency subsystem may include an antenna switch, an antenna tuner, a low noise amplifier (low noise amplifier, LNA), a power amplifier (power amplifier, PA), a mixer (mixer), a local oscillator (local oscillator, LO ), filters and other electronic devices, these electronic devices can be integrated into one or more chips as required. Radio frequency integrated circuits may be referred to as radio frequency processing chips or radio frequency chips. The RF front-end device can also be a stand-alone chip. RF chips are sometimes called receivers, transmitters or transceivers. With the evolution of technology, the antenna can sometimes be considered as a part of the radio frequency subsystem and can be integrated into the chip of the radio frequency subsystem. Antennas, RF front-end devices, and RF chips can all be manufactured and sold separately. Of course, the radio frequency subsystem can also use different devices or different integration methods based on power consumption and performance requirements. For example, if some devices belonging to the radio frequency front end are integrated into the radio frequency chip, even the antenna and the radio frequency front end devices are integrated into the radio frequency chip, the radio frequency chip may also be called a radio frequency antenna module or an antenna module.

Similar to the radio frequency subsystem that mainly completes radio frequency signal processing, as the name suggests, the baseband subsystem mainly completes the processing of baseband signals. The baseband subsystem can extract useful information or data bits from baseband signals, or convert information or data bits into baseband signals to be transmitted. These information or data bits may be data representing user data such as voice, text, video, or control information. For example, the baseband subsystem can implement signal processing operations such as modulation and demodulation, encoding and decoding. For different radio access technologies, such as 5G NR and 4G LTE, the baseband signal processing operations are not exactly the same.

In addition, since the radio frequency signal is usually an analog signal, and the signal processed by the baseband subsystem is mainly a digital signal, an analog-to-digital conversion device is also required in the wireless communication device. In the embodiment of the present application, the analog-to-digital conversion device may be set in the baseband subsystem, or may be set in the radio frequency subsystem. Analog to digital conversion devices include an analog to digital converter (analog to digital converter, ADC) that converts an analog signal into a digital signal, and a digital to analog converter (digital to analog converter, DAC) that converts a digital signal to an analog signal.

Similar to the application subsystem, the baseband subsystem may also include one or more processors. In addition, the baseband subsystem may also include one or more hardware accelerators (hardware accelerator, HAC). Hardware accelerators can be used to specifically complete some sub-functions with high processing overhead, such as assembly and analysis of data packets, encryption and decryption of data packets, etc. These sub-functions can also be implemented by using a general-purpose processor, but due to performance or cost considerations, it may be more appropriate to use a hardware accelerator. In a specific implementation, the hardware accelerator is mainly implemented by an application specified integrated circuit (ASIC). Of course, one or more relatively simple processors, such as MCUs, may also be included in the hardware accelerator.

In the embodiment of the present application, the baseband subsystem and the radio frequency subsystem together form a communication subsystem, which provides a wireless communication function for a wireless communication device. Usually, the baseband subsystem is responsible for managing the hardware and software resources of the communication subsystem, and can configure the working parameters of the radio frequency subsystem. The processor of the baseband subsystem can run a subsystem operating system of the communication subsystem, which is often an embedded operating system or a real time operating system (real time operating system), such as the VxWorks operating system or the QuRT system of Qualcomm.

The baseband subsystem can be integrated into one or more chips, which can be called baseband processing chips or baseband chips. The baseband subsystem can be used as an independent chip, and the chip can be called a modem (modem) or a modem chip. The baseband subsystem can be manufactured and sold in units of modem chips. Modem chips are sometimes called baseband processors or mobile processors. In addition, the baseband subsystem can also be further integrated into a larger chip, and manufactured and sold in units of a larger chip. This larger chip can be called a system-on-a-chip, system-on-a-chip, or system-on-a-chip (SoC), or simply an SoC chip. The software components of the baseband subsystem can be built into the hardware components of the chip before the chip leaves the factory, or can be imported into the hardware components of the chip from other non-volatile memories after the chip leaves the factory, or can be downloaded online through the network and update these software components.

In addition, the wireless communication device also includes a memory, such as the internal memory and the large-capacity memory in FIG. 4 . In addition, the application subsystem and the baseband subsystem may also include one or more buffers respectively. For the relevant introduction of the memory, reference may be made to the foregoing content, which will not be repeated here.

In the embodiment of this application, a certain network element (for example: A network element) receives information from another network element (for example: B network element), which may mean that A network element directly receives information from B network element, or It means that network element A receives information from network element B via other network elements (for example: network element C). When network element A receives information from network element B via network element C, network element C can transparently transmit the information, or process the information, for example, carry the information in different messages for transmission or filter the information , and only send the filtered information to network element A. Similarly, in each embodiment of the present application, sending information from network element A to network element B may mean that network element A directly sends information to network element B, or it may mean that network element A transmits information via other network elements (for example: network C). element) sends information to network element B.

The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple . And, unless otherwise specified, ordinal numerals such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects degree.

Based on the above content, the following further introduces the embodiments of the present application. Fig. 5 exemplarily shows a schematic flow chart of a method for a wireless communication device provided by an embodiment of the present application. The wireless communication apparatus in the embodiment of the present application may be a chip or a terminal device (such as the terminal device 103 in FIG. 1 above). Wherein, the chip may be a baseband chip, or a communication system chip, or a set of chips including a baseband chip and a radio frequency chip. As shown in Figure 5, the method includes:

S501. The wireless communication device scans the first frequency band to obtain a first frequency point sequence; the first frequency point sequence includes at least one first frequency point, and the first frequency point is overlapped between the first frequency band and the second frequency band to be scanned The frequency point of the first frequency band corresponds to the first subcarrier spacing type and the second subcarrier spacing type; the frequency point of the second frequency band corresponds to the first subcarrier spacing type.

The embodiment of the present application is applicable to the initial cell search performed after the terminal device is turned on. It can also be adaptively applied to the cell search process performed by the terminal equipment in the connected state. It should be noted that the embodiment of the present application takes the NR system as an example, and when introducing the embodiment and beneficial effects, it also uses searching for a cell of the NR system as an example.

In a possible implementation manner, in order to speed up cell search, the wireless communication device maintains some frequency points as a priori information for priority search, and these frequency points may be called a priori frequency points. The prior frequency points include but are not limited to the frequency points that have successfully camped on before, the frequency points that have successfully debroadcasted before, and the frequency points where the adjacent cells are configured in the base station system information.

Before S501, in a possible implementation manner, the wireless communication device generally searches for a priori frequency point, and if a cell is found on the a priori frequency point, it tries to access the network through the found cell. If the cell is not found on the prior frequency point, or the cell is found on the prior frequency point but fails to access the network through the cell, the wireless communication device can start full frequency band scanning, that is, the wireless communication device supports The frequency band is scanned to obtain at least one frequency point whose energy level meets the cell search condition on the frequency band.

In the embodiment of the present application, the first frequency band and the second frequency band are two frequency bands supported by the terminal device. Bands can be used to define the band scan range of radio waves. In a communication system of the same standard, such as a long term evolution (long term evolution, LTE) communication system or a new radio (new radio, NR) communication system, etc. The frequency band scanning range defined by a frequency band is fixed, and a frequency band can be configured to at least one operator, and the frequency band scanning range available to each operator may also be different. The frequency band supported by the terminal device may be configured on the terminal device, and may be related to the hardware capability of the terminal device itself. The terminal device may be configured with multiple frequency bands, so when the full frequency band search is started, frequency band scanning and cell search may be performed on each frequency band one by one.

In a possible implementation manner, before the aforementioned S501, the wireless communication device may calculate whether the frequency ranges of the first frequency band and the second frequency band have an overlapping area, and if there is an overlapping area, may perform S501.

In the embodiment of the present application, it can be determined according to the preset rules whether to scan the first frequency band first or to scan the second frequency band first. For example, the priority of the two frequency bands can be determined according to the frequency range corresponding to the frequency band. The larger the frequency range of the frequency band, the higher the priority. higher. Alternatively, the priorities of the first frequency band and the second frequency band may be determined according to preconfigured priority information of frequency bands or priority information of frequency bands issued by the network device. Or randomly select whether to scan the first frequency band first or scan the second frequency band first.

In S501, the first frequency point sequence in this embodiment of the present application may refer to at least one frequency point whose energy level on the first frequency band meets the cell search condition obtained after scanning the first frequency band. In the embodiment of the present application, the frequency points in the first frequency point sequence may not have a sorting relationship, and only at least one frequency point obtained by scanning the first frequency band is called the first frequency point sequence.

In yet another possible implementation manner, the frequency points in the first frequency point sequence have a sequence relationship. In a possible implementation manner, a frequency band search method based on frequency point power statistics may be used. For example, for the frequency points in the frequency point sequence corresponding to a frequency band, the received signal strength indicator (Received Signal Strength Indicator, RSSI) of the frequency point can be measured, and the frequency points in the frequency point sequence are arranged in descending order of RSSI, from high to high The low ones perform cell search on the frequency points in turn. The design idea of this sorting method is that the frequency point with larger RSSI has stronger signal, and the possibility of finding a cell on this frequency point is greater. In yet another possible implementation manner, the frequency points may be sorted according to the priority information of the pre-configured frequency points, or the frequency points may be sorted according to the sequence of the searched frequency points, or it may not be based on any parameters, but only the The searched frequency points are arranged in sequence.

S502. The wireless communication device performs cell search on a frequency point of a first candidate frequency point in the first frequency point sequence. Wherein, at least based on the second subcarrier spacing, the cell search is performed on the first frequency point of the first candidate frequency points.

In the embodiment of the present application, the frequency points in the first frequency point sequence may be screened to obtain the first candidate frequency points. The first candidate frequency points may include all the latter frequency points in the first frequency point sequence. In yet another possible implementation manner, all frequency points in the obtained first frequency point sequence may be directly used as first candidate frequency points, that is, the frequency points in the first frequency point sequence are not screened.

In S502, in a possible implementation manner, the cell search may be performed sequentially on frequency points in the first candidate frequency points. For one or more first frequency points overlapping in the first candidate frequency point and the second frequency point sequence, cell search may be performed on the first frequency point based on the first subcarrier spacing and the second subcarrier spacing respectively in S502. The cell search for the first frequency point may also be performed only based on the second subcarrier spacing, that is, the cell search for the first frequency point is no longer based on the first subcarrier spacing.

S503. The wireless communication device scans the second frequency band to obtain a second frequency point sequence when the wireless communication device fails to access the network through the cell corresponding to the frequency point in the first candidate frequency point. The second frequency point sequence includes the first frequency point.

In S503, the failure of the wireless communication device to access the network through the cell corresponding to the frequency point in the first candidate frequency point may include the following situations: the wireless communication device fails to search for the frequency cell in the first candidate frequency point, or the wireless communication device fails to search for the first candidate frequency point cell. The cell of the frequency point among the candidate frequency points is searched successfully, but the cell that successfully searched fails to access the network.

In S503, in the embodiment of the present application, it may be required to perform a frequency band scan on the second frequency band after the cell search is completed for all frequency points that need to be cell searched among the first candidate frequency points. Alternatively, it may not be required to perform cell search on all frequency points in the first candidate frequency points before performing frequency band scanning on the second frequency band.

In the embodiment of the present application, the second frequency point sequence may refer to at least one frequency point whose energy level on the second frequency band meets the cell search condition obtained after scanning the second frequency band. In the embodiment of the present application, the frequency points in the second frequency point sequence may not have a sorting relationship, and only at least one frequency point obtained by scanning the second frequency band is called the second frequency point sequence. In yet another possible implementation manner, the frequency points in the second frequency point sequence have a sorting relationship, and the cell search may be performed on the frequency points sequentially according to the sorting relationship between the frequency points. For relevant examples of the ordering relationship, reference may be made to relevant descriptions in the aforementioned first candidate frequency point, which will not be repeated here.

S504. The wireless communication device performs cell search on a second candidate frequency point in the second frequency point sequence based on the first subcarrier spacing type. The second candidate frequency point does not include: among the overlapping frequency points, a frequency point on which cell search has been performed based on the first subcarrier spacing type.

It can be seen from the above solution that in the embodiment of the present application, based on the granularity of frequency points, frequency points having at least one same subcarrier spacing type can be deduplicated. In the process of performing the cell search on the frequency points of the first frequency band, at least based on the second subcarrier spacing, perform the cell search on the frequency points in the first candidate frequency points. In the process of cell search for the frequency points of the second frequency point sequence, the overlapping frequency points can be screened, for example, for the first frequency point among the overlapping frequency points, if the In the process of cell search, if the cell search has been performed on the first frequency point based on the first subcarrier spacing, the overlapping first frequency point is screened out from the second frequency point sequence, that is, the second candidate frequency point does not include The first frequency point can avoid performing cell search twice based on the first subcarrier interval on the overlapping first frequency point, and shorten the network search time. Moreover, compared to directly deduplicating the overlapping areas of the first frequency band and the second frequency band, if non-overlapping frequency points are included in the overlapping area, non-overlapping frequency points may be missed.

Based on the above, the embodiment of the present application further provides two possible implementation modes. In implementation mode A, the operation of performing cell search on the first frequency point based on the first subcarrier interval is only performed on the frequency points in the second frequency point sequence. It is performed during cell search. In Embodiment B, the operation of performing cell search on the first frequency points based on the first subcarrier spacing is only performed during the process of performing cell search on the frequency points in the first candidate frequency points. Introduce them separately below.

In Embodiment A, the operation of performing cell search on the first frequency based on the first subcarrier interval is only performed during the process of performing cell search on the frequency of the second frequency band.

In Embodiment A, in the above S502, the wireless communication device performs a cell search on the first frequency point among the first candidate frequency points only based on the second subcarrier spacing . Specifically: the method may include:

The wireless communication device performs a cell search on a first frequency point among first candidate frequency points in the first frequency band based on the second subcarrier spacing type; the first frequency point is a frequency in overlapping frequency points of the first frequency band and the second frequency band point; the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type; the subcarrier spacing type corresponding to the frequency point of the second frequency band includes the first subcarrier spacing type. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band. The second candidate frequency includes the first frequency point. It can also be understood as: in the process of performing cell search on the frequency points in the first candidate frequency points: for the first frequency point, the cell search is not performed on the first frequency point based on the first subcarrier interval.

Although the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type, since the first frequency point is an overlapping frequency point between the first frequency band and the second frequency band, and for In the process of cell search for the frequency point in the first frequency band, the cell search is only performed on the first frequency point based on the second subcarrier interval, and the cell search is not performed on the first frequency point based on the first subcarrier interval. In the process of cell search for the frequency points in the second frequency band, the first frequency point needs to be searched based on the first subcarrier spacing, so as to avoid the overlapping of the first frequency point twice based on the first subcarrier spacing Community search, which in turn can speed up the search speed and shorten the search time.

In yet another possible implementation manner, the first frequency band further includes a second frequency point, and the second frequency band does not include the second frequency point. After scanning the first frequency band to obtain the first candidate frequency point, before scanning the second frequency band, cell search may be performed on the second frequency point based on the first subcarrier spacing and the second subcarrier spacing.

In Embodiment A, in the above S504, since the cell search is not performed on the first frequency point based on the first subcarrier interval during the cell search process on the frequency point of the first candidate frequency point, the first frequency point point belongs to the second candidate frequency point, in S504, based on the first subcarrier spacing type, perform cell search on the first frequency point in the second frequency point sequence.

In Embodiment A, in yet another possible implementation manner, for frequency points in the second frequency band other than those overlapping with those in the first frequency band, the frequency points may or may not be in the overlapping area . Then in the above S504, the frequency point is used as the second candidate frequency point, and the cell search is performed based on the first subcarrier spacing. For example, the second frequency band also includes the third frequency point, and the first frequency band does not include the third frequency point. Then in S504, the third frequency point is used as the second candidate frequency point, and cell search is performed based on the first subcarrier spacing.

In the embodiment of the present application, the first frequency band is part or all of the frequency band corresponding to band41, and the second frequency band is part or all of the frequency band corresponding to band38. For example, the first subcarrier spacing type is 15KHz. The second subcarrier spacing type is, for example, 30KHz. The frequency point of band41 has two subcarrier spacing types of 15 kilohertz (KHz) and 30KHz. The subcarrier spacing type of the frequency point of band38 has only one configuration: 15KHz.

The step size (Step size) of the SSB frequency point of band38 on the synchronization raster (Synchronization raster) sequence defined by 5G is 1. The step size of the SSB frequency point of band41 is 3, so, within the frequency range where band41 and band38 overlap, there are overlapping frequency points between band38 and band41, and there are also non-overlapping frequency points. In this embodiment of the present application, two frequency bands having overlapping frequency points may also be referred to as two frequency points having overlapping frequency points.

Scan the frequency band of band 41 supported by the wireless communication device to obtain the first candidate frequency point. For the first frequency point in the overlapping area, only the synchronization signal blocks with an SCS of 30 kHz are reserved (or it can also be said that the cell search is performed only according to the subcarrier spacing type of 30 kHz). For frequency points in other areas of the first frequency band, two synchronization signal blocks with an SCS of 30 kHz and an SCS of 15 kHz are reserved (or it can also be called, cell search is performed according to two subcarrier spacing types of 30 kHz and 15 kHz respectively).

If the access to the network through the frequency point of the first frequency band fails, the frequency band of band 38 supported by the wireless communication device is scanned to obtain the second frequency point sequence. For the frequency points in the second frequency point sequence (including the first frequency point in the overlapping area, and may also include frequency points in the second frequency point sequence except for the overlapping first frequency point), the SCS is reserved as a synchronization signal of 15kHz block (or it can also be called, cell search is performed according to the subcarrier spacing type of 15kHz). If the network is successfully accessed through the frequency point of the second frequency band, the system information broadcast can be read, and the frequency band information of the serving cell can be updated according to the content in the system information broadcast. If the access to the network through the frequency point of the second frequency band fails, frequency band scanning and cell search may continue to be performed on other frequency bands.

It can be seen from the above content that in the embodiment of the present application, after frequency band scanning is performed on frequency bands to obtain frequency points, a cell search stage is performed, and de-overlapping processing is performed based on frequency point granularity. Specifically, in the process of cell search for the frequency point of band41, the cell search for the first frequency point based on 15KHz has not been performed, then the process of cell search for the frequency point of band38 can be carried out with the first frequency point point as the second candidate frequency point, and conduct a cell search on the first frequency point based on 15KHz. Since the first frequency point is not based on 15KHz cell search in band 41, it is possible to avoid basing the overlapping frequency point on 15KHz Performing two cell searches can speed up the search speed and shorten the search time. A possible laboratory single-frequency cell search duration data, a single SSB frequency takes about 46 milliseconds (ms). Configure according to the theoretical maximum number of overlapping frequency points of BAND41 and BAND38. The theoretical overlapping frequency points are 114. After optimization, the search time of 114*46=5244ms can be saved.

On the other hand, it can be seen that for the overlapping frequency points in the overlapping area, the cell search is performed once in the process of performing the cell search on the two frequency bands respectively.

In a possible implementation, the first frequency band and the second frequency band in the embodiment of the present application are not necessarily required to be continuous. For example, after performing a cell search on the frequency points of the first frequency band, the frequency points of the third frequency band can be Perform a cell search, and then perform a cell search on the frequency point of the second frequency band. In yet another possible implementation manner, in order not to make the cell search time of the first frequency point too late, the frequency band search may be continuously performed on the first frequency band and the second frequency band, that is to say, at the frequency point of the first frequency band After the cell search fails, or the access to the network fails, the second frequency band can then be scanned for the frequency band.

In Embodiment B, the operation of performing cell search on the first frequency points based on the first subcarrier spacing is only performed during the process of performing cell search on the frequency points in the first candidate frequency points.

In Embodiment B, in the above S502, for the first frequency points among the first candidate frequency points, the wireless communication device separately performs the first Frequency point for cell search. Specifically, the method can include:

The wireless communication device performs a cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, the first candidate frequency point includes the first frequency point in the first frequency band, and the first frequency point in the first frequency band A frequency point is a frequency point among overlapping frequency points of the first frequency band and the second frequency band. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band, and the second candidate frequency does not include the second The first frequency point in the frequency band.

In Embodiment B, in the above S504, since the cell search is performed on the first frequency point based on the first subcarrier spacing during the cell search process on the frequency point of the first candidate frequency point, the first frequency point does not It belongs to the second candidate frequency point. In S504, in the process of performing cell search on the frequency points in the first candidate frequency point: do not perform cell search on the first frequency point based on the first subcarrier interval.

In Embodiment B, in yet another possible implementation manner, for the frequency points in the second frequency band other than the frequency points overlapping with the frequency points in the first frequency band, the frequency points may or may not be in the overlapping area . Then in the above S504, the frequency point is used as the second candidate frequency point, and the cell search is performed based on the first subcarrier spacing. For example, the second frequency band also includes the third frequency point, and the first frequency band does not include the third frequency point. Then in S504, the third frequency point is used as the second candidate frequency point, and cell search is performed based on the first subcarrier spacing.

Still taking the example that the first frequency band is part or all of the frequency band corresponding to band41 and the second frequency band is part or all of the frequency band corresponding to band38 as an example, the first subcarrier spacing type is, for example, 15KHz. The second subcarrier spacing type is, for example, 30KHz.

In 501, for the first frequency point in the overlapping area of the first frequency band and the second frequency band, the synchronization signal blocks whose SCS are 30kHz and 15kHz are reserved (or it can also be called, for the first frequency point in the overlapping area, according to the SCS of 30kHz and 15kHz subcarrier spacing type for cell search). In the first frequency band, the manner of processing the frequency points in areas other than the overlapping area may be the same as that of the foregoing embodiment A, and the steps are described in detail.

If the access to the network through the frequency point of the first frequency band fails, the frequency band of band 38 supported by the wireless communication device is scanned to obtain the second frequency point sequence. For the frequency points in the second frequency point sequence except the first frequency point, a synchronization signal block with an SCS of 15 kHz is reserved (or it can also be called, cell search is performed according to a subcarrier spacing type of 15 kHz). That is, for the first frequency point in the overlapping area in the second frequency point sequence, the synchronization signal block whose SCS is 15 kHz is no longer reserved. If the network is successfully accessed through the frequency point of the second frequency band, the system information broadcast can be read, and the frequency band information of the serving cell can be updated according to the content in the system information broadcast. If the access to the network through the frequency point of the second frequency band fails, frequency band scanning and cell search may continue to be performed on other frequency bands.

It can be seen from the above content that in the embodiment of the present application, after frequency band scanning is performed on frequency bands to obtain frequency points, a cell search stage is performed, and de-overlapping processing is performed based on frequency point granularity. Specifically, in the process of cell search for the frequency point of band41, the cell search was performed on the first frequency point based on 30kHz and 15kHz, then in the process of cell search for the frequency point of band38, the second frequency point sequence The first frequency point in the network does not belong to the second candidate frequency point, that is, the cell search for the first frequency point is no longer based on 15KHz, so that the overlapping frequency point can be avoided from performing cell search twice based on 15KHz, thereby speeding up the search. The network speed is shortened, and the time for searching the network is shortened. On the other hand, it can be seen that for the overlapping frequency points in the overlapping area, the process of performing cell search only in the first frequency band performs cell search based on two subcarrier spacing types. In this way, the frequency point whose processing time sequence is earlier in the frequency band, the corresponding cell search is also earlier, and the delay will not be too late.

In a possible implementation manner, the first step size corresponding to the first frequency band on the synchronization grid sequence may be the same as or different from the second step size corresponding to the second frequency band on the synchronization grid sequence.

In a possible implementation manner, when the first step length corresponding to the first frequency band on the synchronization grid sequence is different from the second step length corresponding to the second frequency band on the synchronization grid sequence, the first candidate frequency point The second frequency point may be included in the second frequency point sequence, but the second frequency point may not be included in the second frequency point sequence. The second frequency point sequence may include the third frequency point, but the first candidate frequency point may not include the third frequency point. The third frequency point may or may not be in the overlapping area of the first frequency band and the second frequency band. The second frequency point may or may not be in the overlapping area of the first frequency band and the second frequency band. The cell search methods for the third frequency point and the second frequency point are described above, and will not be repeated here.

In yet another possible implementation manner, in the case where the first step length corresponding to the first frequency band on the synchronization grid sequence is different from the second step length corresponding to the second frequency band on the synchronization grid sequence, if the first step The length is an integer multiple of the second step length, for example, the first step length is 3, and the second step length is 1. That is, the frequency points in the overlapping area of the first frequency band are a subset of the frequency points in the overlapping area of the second frequency band.

In yet another possible implementation manner, in the case where the first step length corresponding to the first frequency band on the synchronization grid sequence is different from the second step length corresponding to the second frequency band on the synchronization grid sequence, if the second step The length is an integer multiple of the length of the first step, for example, the length of the second step is 3, and the length of the first step is 1. That is, the frequency points in the overlapping area of the second frequency band are a subset of the frequency points in the overlapping area of the first frequency band, then in a possible implementation manner, in the above S502, based on the first subcarrier spacing and the second subcarrier spacing Cell search is performed on all frequency points in the overlapping area of the first frequency band. In S503, in the process of performing frequency band scanning on the second frequency band, scanning is only performed on the frequency bands of the second frequency band except the overlapping area. That is, in the process of scanning the frequency band of the second frequency band, the frequency band scanning is no longer performed on the overlapping area, so that the network search speed can be further accelerated.

In yet another possible implementation manner, the first step length corresponding to the first frequency band on the synchronization grid sequence is the same as the second step length corresponding to the second frequency band on the synchronization grid sequence, then the overlap in the first frequency band The frequency point corresponding to the area may be exactly the same as the frequency point corresponding to the overlapping area in the second frequency band. In this case, in another possible implementation manner, in the process of cell search for frequency points in the first frequency band, for all frequency points in the overlapping area, based on the first subcarrier spacing and the second subcarrier spacing Do a neighborhood search. Instead, in the process of scanning for the second frequency band, no frequency band scanning is performed on the overlapping area. In this way, the speed of searching the Internet can be further accelerated.

According to the foregoing method, FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in FIG. A chip or a circuit, such as a chip or a circuit that may be provided in a wireless communication device. The wireless communication device may be the terminal device mentioned above (for example, the terminal device in FIG. 3 ), or a chip or a circuit in the terminal device.

As shown in FIG. 6 , the communication device 1301 may include a processor 1302 and a transceiver 1303 coupled to the processor 1302 . A memory 1304 may also be included.

Further, the communication device 1301 may further include a bus system, wherein the processor 1302, the memory 1304, and the transceiver 1303 may be connected through the bus system.

It should be understood that the above processor 1302 may be a chip. For example, the processor 1302 may be the aforementioned processor 110 in FIG. 3 . For related introduction, refer to the introduction about the processor 110 in FIG. 3 , and details are not repeated here.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1302 or instructions in the form of software. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor 1302 . The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 1304, and the processor 1302 reads the information in the memory 1304, and completes the steps of the above method in combination with its hardware.

It should be noted that the processor 1302 in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory 1304 in the embodiment of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

The memory 1304 is used to store instructions, and the processor 1302 is used to execute the instructions stored in the memory 1304, so as to implement a related solution of the wireless communication device in the method in FIG. 5 above.

In a possible implementation manner, the processor 1302 is configured to use the transceiver 1303 to: perform cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, and the first A candidate frequency point includes a first frequency point in the first frequency band, and the first frequency point is a frequency point among overlapping frequency points of the first frequency band and the second frequency band. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band, and the second candidate frequency does not include the second The first frequency point in the frequency band.

In yet another possible implementation manner, the processor 1302 is configured to use the transceiver 1303 to: perform cell search on a first frequency point among first candidate frequency points in the first frequency band based on the second subcarrier spacing type; the first The frequency point is a frequency point in the overlapping frequency points of the first frequency band and the second frequency band; the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type; The subcarrier spacing type corresponding to the frequency point includes the first subcarrier spacing type. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band. The second candidate frequency includes the first frequency point.

For the concepts, explanations, detailed descriptions and other steps involved in the communication device related to the technical solutions provided by the embodiments of the present application, please refer to the foregoing methods or descriptions of these contents in other embodiments, and details are not repeated here.

According to the foregoing method, FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 7 , a communication device 1401 may include a communication interface 1403 , a processor 1402 and a memory 1404 . The communication interface 1403 is used to input and/or output information; the processor 1402 is used to execute computer programs or instructions, so that the communication device 1401 implements the method on the wireless communication device side in FIG. 5 above. In the embodiment of the present application, the communication interface 1403 can implement the solution implemented by the transceiver 1303 in FIG. 6, the processor 1402 can implement the solution implemented by the processor 1302 in FIG. 6, and the memory 1404 can implement the memory 1304 in FIG. The implemented solution will not be described in detail here.

Based on the above embodiments and the same idea, FIG. 8 is a schematic diagram of a communication device provided in an embodiment of the present application. As shown in FIG. 8 , the communication device 1501 may be a wireless communication device (such as the wireless communication device in the aforementioned FIG. 4 ), It may also be a chip or a circuit, such as a chip or a circuit that may be provided in a wireless communication device. The wireless communication device may be the terminal device mentioned above (for example, the terminal device in FIG. 3 ), or a chip or a circuit in the terminal device.

The communication device can implement the steps performed by the wireless communication device in the method in FIG. 5 above. The communication device may include a processing unit 1502 , a communication unit 1503 and a storage unit 1504 .

In a possible implementation manner, the processing unit 1502 is configured to use the communication unit 1503 to: perform cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, and the first A candidate frequency point includes a first frequency point in the first frequency band, and the first frequency point is a frequency point among overlapping frequency points of the first frequency band and the second frequency band. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band, and the second candidate frequency does not include the second The first frequency point in the frequency band.

In yet another possible implementation manner, the processing unit 1502 is configured to use the communication unit 1503 to: perform cell search on the first frequency point among the first candidate frequency points in the first frequency band based on the second subcarrier spacing type; The point is a frequency point in the overlapping frequency points of the first frequency band and the second frequency band; the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type; the frequency point of the second frequency band The subcarrier spacing type corresponding to the point includes the first subcarrier spacing type. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band. The second candidate frequency includes the first frequency point.

It can be understood that, the functions of each unit in the above communication device 1501 can refer to the implementation of the corresponding method embodiment, which will not be repeated here.

It should be understood that the above division of units of the communication device is only a division of logical functions, which may be fully or partially integrated into one physical entity or physically separated during actual implementation. In the embodiment of the present application, the communication unit 1503 may be realized by the transceiver 1303 in FIG. 6 above, and the processing unit 1502 may be realized by the processor 1302 in FIG. 6 above.

Based on the above embodiments and the same idea, FIG. 9 is a schematic diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 9, the communication device 1601 may be a wireless communication device (such as the wireless communication device in the aforementioned FIG. 4 ), It may also be a chip or a circuit, such as a chip or a circuit that may be provided in a wireless communication device. The wireless communication device may be the terminal device mentioned above (for example, the terminal device in FIG. 3 ), or a chip or a circuit in the terminal device.

The communication device may correspond to the wireless communication device in the above method. The communication device can implement the steps performed by the wireless communication device in the method in FIG. 5 above. The communication device may include a processing circuit 1602 and an interface circuit 1603 .

In yet another possible implementation manner, the processing circuit 1602 is configured to, through the interface circuit 1603: perform cell search on a first candidate frequency point in the first frequency band based on the first subcarrier spacing type and the second subcarrier spacing type, The first candidate frequency point includes a first frequency point in the first frequency band, and the first frequency point is a frequency point in overlapping frequency points of the first frequency band and the second frequency band. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band, and the second candidate frequency does not include the second The first frequency point in the frequency band.

In yet another possible implementation manner, the processing circuit 1602 is configured to, through the interface circuit 1603: based on the second subcarrier spacing type, perform cell search on a first frequency point among first candidate frequency points in the first frequency band; The frequency point is a frequency point in the overlapping frequency points of the first frequency band and the second frequency band; the subcarrier spacing type corresponding to the frequency point of the first frequency band includes the first subcarrier spacing type and the second subcarrier spacing type; The subcarrier spacing type corresponding to the frequency point includes the first subcarrier spacing type. When the cell corresponding to the first candidate frequency fails to access the network, based on the first subcarrier spacing type, cell search is performed on the second candidate frequency in the second frequency band. The second candidate frequency includes the first frequency point.

It can be understood that, the functions of each unit in the above communication device 1601 can refer to the implementation of the corresponding method embodiment, and details are not repeated here.

It should be understood that the above division of units of the communication device is only a division of logical functions, which may be fully or partially integrated into one physical entity or physically separated during actual implementation. In the embodiment of the present application, the interface circuit 1603 may be realized by the transceiver 1303 in FIG. 6 above, and the processing circuit 1602 may be realized by the processor 1302 in FIG. 6 above.

According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product including: computer program code or instruction, when the computer program code or instruction is run on the computer, the computer is made to execute the The method of any of the illustrated embodiments.

According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, the computer-readable medium stores program code, and when the program code is run on the computer, the computer is made to execute the implementation shown in Figure 5. The method of any one embodiment in the example.

According to the method provided in the embodiment of the present application, the present application further provides a chip system, where the chip system may include a processor. The processor is coupled with the memory, and may be used to execute the method in any one of the embodiments shown in FIG. 1 to FIG. 3 . Optionally, the chip system further includes a memory. Memory, used to store computer programs (also called code, or instructions). The processor is configured to call and run a computer program from the memory, so that the device installed with the system-on-a-chip executes the method of any one of the embodiments shown in FIG. 5 .

According to the method provided in the embodiment of the present application, the present application further provides a system, which includes the aforementioned one or more wireless communication devices and one or more network devices.

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

It should be pointed out that a part of the patent application documents contains content protected by copyright. Copyright is reserved by the copyright owner other than to make copies of the contents of the patent file or records of the Patent Office.

The network equipment in each of the above device embodiments corresponds to the network equipment or wireless communication device in the wireless communication device and method embodiments, and the corresponding modules or units execute corresponding steps, for example, the communication unit (transceiver) executes the receiving method in the method embodiment Or the step of sending, other steps besides sending and receiving may be performed by a processing unit (processor). For the functions of the specific units, reference may be made to the corresponding method embodiments. Wherein, there may be one or more processors.

The terms "component", "module", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.

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

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

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

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should cover Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A cell search method, characterized in that, comprising:

Based on the first subcarrier spacing type and the second subcarrier spacing type, perform a cell search on a first candidate frequency point in the first frequency band, where the first candidate frequency point includes a first frequency point in the first frequency band point, the first frequency point is a frequency point in the overlapping frequency points of the first frequency band and the second frequency band;

In the case of failing to access the network through the cell corresponding to the first candidate frequency point, based on the first subcarrier spacing type, perform cell search on the second candidate frequency point in the second frequency band, the second frequency point candidate The two candidate frequency points do not include the first frequency point in the second frequency band.
The method of claim 1, characterized in that:

The subcarrier spacing type corresponding to the frequency point of the first frequency band includes: the first subcarrier spacing type and the second subcarrier spacing type;

The subcarrier spacing type corresponding to the frequency point of the second frequency band includes: the first subcarrier spacing type.
The method according to claim 1 or 2, wherein the first candidate frequency point further includes a second frequency point, and the second frequency point is in the first frequency band except for the overlapping frequency point The frequency points in the frequency points;

and / or,

The second candidate frequency point further includes a third frequency point, where the third frequency point is a frequency point in the second frequency band except for the overlapping frequency points.
The method according to any one of claims 1-3, wherein the first frequency length corresponding to the first frequency band on the synchronization grid sequence is the same as the first frequency length corresponding to the second frequency band on the synchronization grid sequence. The two steps are different.
The method according to any one of claims 1-4, wherein the first subcarrier spacing type is 15KHz; the second subcarrier spacing type is 30KHz.
The method according to any one of claims 1-5, wherein the first frequency band is part or all of the frequency band corresponding to band41; the second frequency band is part or all of the frequency band corresponding to band38.
A wireless communication device, characterized in that it includes:

processing circuitry, and interface circuitry coupled to the processing circuitry, wherein the processing circuitry is configured to, through the interface circuitry:

Based on the first subcarrier spacing type and the second subcarrier spacing type, perform a cell search on a first candidate frequency point in the first frequency band, where the first candidate frequency point includes a first frequency point in the first frequency band point, the first frequency point is a frequency point in the overlapping frequency points of the first frequency band and the second frequency band;

In the case of failing to access the network through the cell corresponding to the first candidate frequency point, based on the first subcarrier spacing type, perform cell search on the second candidate frequency point in the second frequency band, the second frequency point candidate The two candidate frequency points do not include the first frequency point in the second frequency band.
The wireless communication device according to claim 7, wherein the subcarrier spacing type corresponding to the frequency point of the first frequency band comprises: the first subcarrier spacing type and the second subcarrier spacing type;

The subcarrier spacing type corresponding to the frequency point of the second frequency band includes: the first subcarrier spacing type.
The wireless communication device according to claim 7 or 8, wherein the first candidate frequency point further includes a second frequency point, and the second frequency point is the overlapping frequency point in the first frequency band Frequency points in other frequency points;

and / or,

The second candidate frequency point also includes a third frequency point, and the third frequency point is a frequency point in the second frequency band except for the overlapping frequency points.
The wireless communication device according to any one of claims 7-9, wherein the first frequency band corresponding to the first frequency band on the synchronization grid sequence corresponds to the second frequency band on the synchronization grid sequence The second step size is different.
The wireless communication device according to any one of claims 7-10, wherein the first subcarrier spacing type is 15KHz; the second subcarrier spacing type is 30KHz.
The wireless communication device according to any one of claims 7-11, wherein the first frequency band is part or all of the frequency band corresponding to band41; the second frequency band is part or all of the frequency band corresponding to band38.
A communication device, characterized in that the device includes a processor and a memory,

The memory is used to store executable programs;

The processor is configured to execute the computer-executable program in the memory, so that the method described in any one of claims 1-6 is executed.
A communication device, characterized in that the device includes a processor and a communication interface,

said communication interface for inputting and/or outputting information;

The processor is configured to execute a computer-executable program, so that the method described in any one of claims 1-6 is executed.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer-executable program, and when the computer-executable program is invoked by a computer, the computer executes any of claims 1-6. one of the methods described.
A system on a chip, characterized in that it comprises:

said communication interface for inputting and/or outputting information;

A processor, configured to execute a computer-executable program, so that the device installed with the system-on-a-chip executes the method according to any one of claims 1-6.