CN114071655B

CN114071655B - Network searching method and related device

Info

Publication number: CN114071655B
Application number: CN202010763302.XA
Authority: CN
Inventors: 睢菲菲; 刘海义; 魏珍荣; 智钢
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-11-22
Anticipated expiration: 2040-07-31
Also published as: CN114071655A

Abstract

Disclosed is a network searching method, comprising: the terminal equipment searches a first frequency point list for a cell, wherein the first frequency point list comprises historical frequency points where the terminal equipment resides; when the cell search of the first frequency point list fails, the terminal equipment searches a cell of a second frequency point list, wherein the frequency points in the second frequency point list are preset frequency points; when the cell search of the second frequency point list fails, the terminal device sweeps the frequency band supported by the terminal device, and determines a third frequency point list according to a first frequency sweeping parameter, wherein the first frequency sweeping parameter at least comprises a primary synchronization signal ratio PssRatio; pssRatio is used for indicating the possibility of the existence of the cell on the frequency point; and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list. According to the embodiment of the application, the power consumption of network searching is reduced, the time for network searching is shortened, and the user experience is improved.

Description

Network searching method and related device

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a network searching method and a related device.

Background

When the mobile phone is in a state without network service (for example, when the mobile phone is turned on, turned off in a flight mode, or goes out of service), the mobile phone needs to search the wireless network first to re-determine a cell where the mobile phone can reside, so as to ensure normal communication and data transmission. When searching for a network again, the mobile phone firstly scans the resident historical frequency point, and if an effective network can be searched at the historical frequency point and the registration is successful, the mobile phone normally resides in a cell; if the cell is not successfully resided in the cell in the historical frequency points, the cell searches the full frequency band according to the supported frequency band until an effective network is searched, and finds a proper cell to reside.

The current network searching mode has large power consumption, long time consumption and poor user experience.

Disclosure of Invention

The embodiment of the application provides a network searching method and a related device, which can reduce network searching power consumption, shorten network searching time and improve user experience.

In a first aspect, the present application provides a network searching method, including: the terminal equipment carries out cell search on a first frequency point list, wherein the first frequency point list comprises historical frequency points where the terminal equipment resides; when the cell search of the first frequency point list fails, the terminal equipment searches a cell of a second frequency point list, wherein the frequency points in the second frequency point list are preset frequency points; when the cell search of the second frequency point list fails, the terminal device sweeps the frequency bands supported by the terminal device, and determines a third frequency point list according to first sweep parameters, wherein the first sweep parameters at least comprise a primary synchronization signal ratio (PssRatio); pssRatio is used to indicate the possibility of a cell existing on a frequency bin; and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list.

In the embodiment of the application, when the cell search of the history frequency point and the preset frequency point fails, the terminal device performs full-band search, and determines the third frequency point list according to the first frequency scanning parameter, wherein the first frequency scanning parameter at least comprises PssRatio. Then, the terminal device sequentially executes cell search for the frequency points in the third frequency point list. Therefore, the possibility of searching invalid frequency points by the terminal equipment can be reduced, the power consumption of network searching is reduced, the time for network searching is shortened, and the user experience is improved.

In an implementation manner, the frequency sweeping performed by the terminal device on the frequency band supported by the terminal device, and determining the third frequency point list according to the first frequency sweeping parameter specifically include: the method comprises the steps that the terminal device sweeps a frequency band supported by the terminal device, a first frequency point set in the frequency band supported by the terminal device and a first frequency sweeping parameter corresponding to each frequency point in the first frequency point set are determined; the terminal equipment determines a second frequency point set from the first frequency point set, wherein PssRatio of frequency points in the second frequency point set is greater than a first threshold value; and the terminal equipment sequences the frequency points in the second frequency point set based on the second sweep frequency parameter to generate a third frequency point list.

In the embodiment of the application, frequency points with a probability that no cell exists are excluded by excluding the frequency points with PssRatio smaller than the first threshold. Therefore, the network searching power consumption is reduced, the network searching time is shortened, and the user experience is improved.

In one implementation, the first sweep parameter further includes energy information; pssRatio of the frequency points in the second frequency point set is greater than a first threshold, and the energy information of the frequency points in the second frequency point set is greater than a second threshold; the second sweep parameters include at least PssRatio and/or energy information.

In the embodiment of the application, most invalid frequency points are eliminated by eliminating the frequency points with the energy information smaller than the second threshold value, so that the terminal equipment is prevented from wasting time to execute cell search on the invalid frequency points. Therefore, the network searching power consumption is reduced, the network searching time is shortened, and the user experience is improved.

In one implementation, the first scanning parameter further includes an SCS configuration; the second sweep frequency parameters at least comprise PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point; the above terminal device sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list based on the SCS configuration of the frequency points in the third frequency point list.

In the embodiment of the application, the frequency points in the frequency band supporting various SCS configurations are determined in advance, so that the terminal equipment can be prevented from performing cell search on useless SCS configurations. Therefore, the network searching power consumption is reduced, the network searching time is shortened, and the user experience is improved.

In an implementation manner, the first frequency sweeping parameter further includes energy information and a first parameter, and the first frequency point set includes synchronization signal center frequency points SS corresponding to three values of the first parameter in one synchronization grid respectively _REF (ii) a The PssRatio of the frequency points in the second frequency point set is larger than a first threshold value, the energy information of the frequency points in the second frequency point set is larger than a second threshold value, and when the synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters corresponding to each frequency point; the above terminal device sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: terminal deviceAnd sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

In the embodiment of the present application, for a frequency point in a frequency band supporting values of multiple first parameters (i.e., M), by determining the value of the first parameter in advance, an SS corresponding to the value of the useless first parameter by the terminal device 100 is avoided _REF And the frequency point executes cell search. Therefore, the network searching power consumption is reduced, the network searching time is shortened, and the user experience is improved.

In an implementation manner, the first scanning parameter further includes energy information, a first parameter, and SCS configuration, and the first frequency point set includes a synchronization signal center frequency point SS corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than a first threshold value, the energy information of the frequency points in the second frequency point set is greater than a second threshold value, and when a synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of a first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters and SCS configuration corresponding to each frequency point; the above terminal device sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list.

In an implementation manner, a Subscriber Identity Module (SIM) card of the terminal device carries a Public Land Mobile Network (PLMN) identifier, and the preset frequency point in the second frequency point list is determined by the terminal device according to the PLMN identifier.

In a second aspect, the present application provides a terminal device comprising one or more processors, and a computer storage medium; wherein the computer storage medium has computer instructions stored thereon, which when executed by the one or more processors, cause the terminal device to perform: performing cell search on a first frequency point list, wherein the first frequency point list comprises historical frequency points where terminal equipment resides; when the cell search of the first frequency point list fails, the cell search is carried out on a second frequency point list, and the frequency points included in the second frequency point list are preset frequency points; when the cell search of the second frequency point list fails, frequency sweeping is carried out on the frequency bands supported by the terminal equipment, and a third frequency point list is determined according to first frequency sweeping parameters, wherein the first frequency sweeping parameters at least comprise PssRatio; pssRatio is used to indicate the possibility of a cell existing on a frequency bin; and sequentially executing cell search on the frequency points in the third frequency point list.

In an implementation manner, the frequency sweeping for the frequency band supported by the terminal device and determining the third frequency point list according to the first frequency sweeping parameter specifically include: frequency sweeping is carried out on the frequency band supported by the terminal equipment, a first frequency point set in the frequency band supported by the terminal equipment and a first frequency sweeping parameter corresponding to each frequency point in the first frequency point set are determined; determining a second frequency point set from the first frequency point set, wherein PssRatio of frequency points in the second frequency point set is greater than a first threshold value; and sequencing the frequency points in the second frequency point set based on the second frequency sweeping parameter to generate a third frequency point list.

In one implementation, the first scanning parameter further includes an SCS configuration; the second sweep frequency parameters at least comprise PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point; the above sequentially performing cell search on the frequency points in the third frequency point list specifically includes: and sequentially executing cell search on the frequency points in the third frequency point list based on the SCS configuration of the frequency points in the third frequency point list.

In an implementation manner, the first frequency sweeping parameter further includes energy information and a first parameter, and the first frequency point set includes a synchronization signal center frequency point SS corresponding to three values of the first parameter in a synchronization grid respectively _REF (ii) a PssRatio of frequency points in the second frequency point set is larger than the first threshold value, and the second frequency point set is larger than the first threshold valueThe energy information of the frequency points in the frequency point set is larger than a second threshold value, and when the synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweep parameter at least comprises PssRatio and/or energy information, and the third frequency point list comprises a first parameter corresponding to each frequency point; the above sequentially performing cell search on the frequency points in the third frequency point list specifically includes: and sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

In an implementation manner, the first frequency sweeping parameter further includes energy information, a first parameter, and SCS configuration, and the first frequency point set includes synchronization signal center frequency points SS corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than a first threshold value, the energy information of the frequency points in the second frequency point set is greater than a second threshold value, and when a synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of a first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters and SCS configuration corresponding to each frequency point; the above sequentially performing cell search on the frequency points in the third frequency point list specifically includes: and sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list.

In an implementation manner, the SIM card of the terminal device carries a PLMN identifier, and the preset frequency point in the second frequency point list is determined by the terminal device according to the PLMN identifier.

In a third aspect, the present application provides a chip, including a baseband processor, where the baseband processor is configured to perform cell search on a first frequency point list, where the first frequency point list includes historical frequency points where terminal equipment resides; when the cell search of the first frequency point list fails, the baseband processor is also used for carrying out the cell search of a second frequency point list, wherein the frequency points in the second frequency point list are preset frequency points; when the cell search of the second frequency point list fails, the baseband processor is further configured to sweep frequencies of the frequency bands supported by the terminal device, and determine a third frequency point list according to first sweep parameters, where the first sweep parameters at least include PssRatio; pssRatio is used to indicate the possibility of a cell existing on a frequency bin; the baseband processor is further configured to sequentially perform cell search on the frequency points in the third frequency point list.

In an implementation manner, the above baseband processor is further configured to sweep a frequency band supported by the terminal device, and determine the third frequency band list according to the first sweep parameter, including: the baseband processor is further configured to sweep frequency of a frequency band supported by the terminal device, and determine a first frequency point set in the frequency band supported by the terminal device and a first sweep frequency parameter corresponding to each frequency point in the first frequency point set; the baseband processor is also used for determining a second frequency point set from the first frequency point set, and PssRatio of frequency points in the second frequency point set is greater than a first threshold value; the baseband processor is further used for sequencing the frequency points in the second frequency point set based on the second sweep frequency parameter to generate a third frequency point list.

In one implementation, the first scanning parameter further includes an SCS configuration; the second sweep frequency parameters at least comprise PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point; the baseband processor is further configured to sequentially perform cell search for the frequency points in the third frequency point list, including: the baseband processor is further configured to sequentially perform cell search on the frequency points in the third frequency point list based on SCS configuration of the frequency points in the third frequency point list.

In an implementation manner, the first frequency sweeping parameter further includes energy information and a first parameter, and the first frequency point set includes synchronization signal center frequency points SS corresponding to three values of the first parameter in one synchronization grid respectively _REF (ii) a PssRatio of frequency point in second frequency point set is greater than first threshold value, and second frequency pointThe energy information of the concentrated frequency points is greater than a second threshold value, and when the synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweep parameter at least comprises PssRatio and/or energy information, and the third frequency point list comprises a first parameter corresponding to each frequency point; the baseband processor is further configured to sequentially perform cell search on the frequency points in the third frequency point list, including: the baseband processor is further configured to sequentially perform cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

In an implementation manner, the first frequency sweeping parameter further includes energy information, a first parameter, and SCS configuration, and the first frequency point set includes synchronization signal center frequency points SS corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a The PssRatio of the frequency points in the second frequency point set is larger than a first threshold value, the energy information of the frequency points in the second frequency point set is larger than a second threshold value, and when the synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters and SCS configuration corresponding to each frequency point; the baseband processor is further configured to sequentially perform cell search for the frequency points in the third frequency point list, including: the baseband processor is further configured to perform cell search on the frequency points in the third frequency point list in sequence according to the first parameters and SCS configuration of the frequency points in the third frequency point list.

In a fourth aspect, a computer-readable storage medium is provided, which includes computer instructions, and is characterized by that, when the computer instructions are executed on a terminal device, the computer instructions cause the terminal device to execute any one of the possible implementation manners as in the first aspect.

In a fifth aspect, a computer program product is provided, which, when run on a computer, causes the computer to perform any one of the possible implementations of the first aspect.

Drawings

Fig. 1 is a system architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a protocol architecture of a wireless interface according to an embodiment of the present application;

fig. 3 is a schematic diagram of a protocol architecture of a synchronization information block SSB according to an embodiment of the present application;

fig. 4A is a schematic diagram of a restart interface according to an embodiment of the present disclosure;

fig. 4B is a schematic diagram of an unconnected network interface according to an embodiment of the present application;

fig. 4C is a schematic diagram of an interface of a network connection according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of a network searching method according to an embodiment of the present application;

fig. 6 is a schematic flowchart of another network searching method according to an embodiment of the present application;

fig. 7 is a schematic flowchart of another network searching method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a system chip according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

The technical solution in the embodiments of the present application will be described in detail and removed with reference to the accompanying drawings. Wherein in the description of the embodiments of the present application, "/" indicates an inclusive meaning, for example, a/B may indicate a or B; "and/or" in the text is only an association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: three cases of a alone, a and B both, and B alone exist, and in addition, "a plurality" means two or more than two in the description of the embodiments of the present application.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of embodiments of the application, unless stated otherwise, "plurality" means two or more.

Illustratively, fig. 1 shows a wireless communication system according to an embodiment of the present application. As shown in fig. 1, the wireless communication system 100 may include: one or more terminal devices 100, one or more network devices 200, and a core network (not shown). Wherein:

the network device 200 may also be referred to as AN Access Network (AN) device, and the access network device may provide a network access function for authorized users in a specific area, and may use transmission tunnels with different qualities according to user levels, service requirements, and the like, so as to complete forwarding of control signals and user data between the terminal device 100 and the core network. The access networks may be access networks employing different access technologies. Current radio access technologies include: third generation partnership project (3 rd generation partnership project,3 GPP) access technology and non-third generation partnership project (non-3 GPP) access technology. The 3GPP access technology refers to an access technology conforming to 3GPP standard specifications, and includes, for example, a radio access technology adopted in a third generation (3 rd generation, 3G) system, a fourth generation (4 th generation, 4G) system, and a 5G system. An access network that employs 3GPP access technology is referred to as a Radio Access Network (RAN). Non-3GPP access technologies refer to access technologies that do not conform to 3GPP standard specifications. For example, air interface technology represented by wireless fidelity (WiFi) is used.

The network device 200 may include a base station, which may be configured to communicate with one or more terminal devices and may also be configured to communicate with one or more base stations having some terminal functionality (e.g., communication between a macro base station and a micro base station, such as an access point). The base station may include a Base Transceiver Station (BTS) in a time division synchronous code division multiple access (TD-SCDMA) system, an evolved base station (NodeB or eNB or e-NodeB, evolved Node B) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-a), and a next generation Node (gNB) in a fifth generation mobile communication technology (five generation, 5G) new wireless (new radio, NR) system. In addition, the base station may also include an Access Point (AP), a Transmission Reception Point (TRP), a Centralized Unit (CU) and a Distributed Unit (DU) in a cloud access network (cloudlan) system, or other network entities, and may include some or all of the functions of the above network entities. The embodiments of the present application are not limited.

Terminal device 100 comprises a device that provides data connectivity to a user and may comprise, for example, a handheld device having wireless connection capability or a processing device connected to a wireless modem. The terminal device 100 may communicate with one or more core network devices through the RAN, or may access a distributed network in an ad hoc or unlicensed manner, the terminal device 100 may also access a wireless network in another manner to communicate, and the terminal device 100 may also directly perform wireless communication with other UEs, which is not limited in this embodiment of the present application. In some embodiments of the present application, the terminal device 103 may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an Access Point (AP), a remote terminal device (remote), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a user equipment (user device), or the like. For example, mobile phones (or so-called "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included or vehicle-mounted mobile devices, smart wearable devices, and so forth may be included.

In addition, the communication system may also be applied to future-oriented communication technologies, and the system described in the embodiment of the present application is for more clearly illustrating the technical solutions of the embodiment of the present application, and does not constitute a limitation on the solutions provided in the embodiment of the present application.

The base station provides the air interface for the user and the terminal device 100 may be connected to the base station by radio. The base station is further connected to the core network of the operator through a wire to realize service communication. In practical application, an interface refers to an information interaction mode between different network elements, and interface protocols adopted during communication between different interfaces may be different.

To facilitate understanding of the proposed solution in the embodiments of the present application, the protocol architecture of the wireless interface is described below.

At present, the interface protocol of the wireless system is divided into three layers: a L1 physical layer (PHY), a L2 data link layer (data link layer), and a L3 network layer (network layer). Illustratively, fig. 2 shows a protocol architecture diagram of a wireless interface.

The L1 physical layer is the lowest layer of the wireless access system, and the main task of the physical layer is to provide data transmission service for higher layers by using a transport channel as an interface, and the service is accessed by using the transport channel through the MAC layer. The physical layer may provide modem, codec, signal measurement, antenna mapping, or other telecommunication physical layer functions, and the physical layer defined signals include: primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS). The physical layer involves physical layer procedures including: cell search, power control, synchronization procedures, random access procedures, beam management procedures, and the like.

The multiple access scheme of the 5G NR physical layer is: orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP).

The L2 data link layer includes a PDCP layer, a Radio Link Control (RLC) layer, and a MAC layer. The PDCP layer is mainly responsible for performing header compression to reduce bit traffic transmitted by the radio interface. The RLC layer is mainly responsible for processing such as segmentation and concatenation, and sequence control of higher layer data. The MAC layer is mainly responsible for hybrid automatic repeat request (HARQ) retransmission, uplink and downlink scheduling, and the like.

The L3 network layer includes a non-access stratum (NAS) layer and an RRC layer. The NAS may be configured to transmit user information or control information, such as establishment and release of a 4G/5G communication link or service, and mobility management information. The protocol layers below the NAS layer may also be referred to AS Access Stratum (AS).

The functions of the RRC layer specifically include: providing the required channel information for the UE to access the network; establishing, reconfiguring and releasing RRC connections: the paging initiated by a 5G Core network (5C Core network, 5GC) and a radio access network is supported, and the paging is used for paging UE in an idle state and UE in an inactive state; establishing, reconfiguring and releasing Signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs); mobility management; quality of service (QoS) management and slice management; UE measurement control and measurement report; detection and recovery of a radio link; non-access stratum (NAS) messaging, and the like. Wherein the mobility management includes cell handover and reselection of the UE.

RRC under 5G NR has three states: IDLE state (IDLE), INACTIVE state INACTIVE, CONNECTED state (CONNECTED). Wherein, the RRC connection state supports: handover between the gNB and the gNB; handover between a gNB and an LTE eNB. RRC idle state and RRC inactive state support: cell reselection between the gNB and LTE eNB.

The following describes related concepts related to the network searching method provided in the embodiment of the present application, including: synchronization Signal Block (SSB), global Synchronization Channel Number (GSCN), subcarrier space (SCS), physical Cell Identifier (PCI).

The network access process of the terminal device 100 may include: cell search (PLMN search), random access, ATTACH (ATTACH), common flow, etc. In the cell search process, the terminal device 100 searches for a network and acquires downlink synchronization with the network. The SSB is a downlink signal required for the terminal device 100 to camp in LTE or 5G NR during a cell search or random access procedure. The terminal device 100 may scan all SSB locations in the available frequency band (e.g., a grid scan) to identify accessible cells to camp on, and may perform frequency domain synchronization and time domain synchronization based on the SSBs. The SSB structure is shown in fig. 3, and occupies 4 OFDM symbols in time domain and 20 RBs (240 subcarriers) in frequency domain. Wherein, PSS is located in the middle 127 subcarriers of symbol 0, SSS is located in the middle 127 subcarriers of symbol 2.

PSS is a pseudorandom sequence of frequency domain length 127, generated from the m-sequence. PSS sequences can be expressed as dpss (n) =1-2x (m). Wherein n is more than or equal to 0<127, wherein the m-sequence may be represented as:

the value range is {0,1,2}.

Is the intra-group number (ID) of the PCI.

The three values (0, 1, 2) correspond to the three PSS sequences, respectively.

The 5G NR includes nearly 30 Operating frequency bands (NR Operating bands), and the bandwidth of the 5G NR system is large (e.g., 100mhz, 400mhz). To improve the cell search speed, the terminal device 100 may determine the frequency domain location of the SSB through a Synchronization grid (Synchronization master) indicating the location where the SSB may appear in frequency. Table 1 shows SS of the synchronization grid _REF (the position of the SSB center frequency point) and the GSCN parameter. As shown in Table 1, the step size of the synchronization grid is 1200kHz in the frequency range of 0 to 3000 MHz; the step size of the synchronization grid is 1.44MHz in the frequency range of 3000MHz to 24250 MHz; the step size of the synchronization grid is 17.82MHz in the frequency range of 24250MHz to 100000 MHz. Terminal device 100 may SS within its supported frequency bands _REF In a position ofLine PSS/SSS search.

TABLE 1

NR supports a total of 5 SCS configurations: 15kHz, 30kHz, 60kHz, 120kHz and 240kHz. Table 2 shows the correspondence relationship between the partial operating frequency band, the SCS supported by the operating frequency band, and the GSCN parameter. As shown in table 2, one frequency band may support one or more SCS configurations. For example, the n41 frequency band supports two SCS configurations of 15kHz and 30kHz, and the n257 frequency band supports two SCS configurations of 120kHz and 240kHz.

TABLE 2

NR defines 1008 PCIs. The PCI is a radio signal used to distinguish different cells, and ensures that there is no same physical cell id in the coverage area of the relevant cell. Where the PCI of each cell may be expressed as,

wherein the content of the first and second substances,

in order to be the group ID,

is an intra-group ID. Wherein the content of the first and second substances,

the value range is {0,1 \8230; 335},

the value range is {0,1,2}.

A mobile communication network is a cellular network consisting of a plurality of cells, each having a specific coverage area, and the frequencies and/or frequency bands supported by different cells may be different. When the position of the terminal device 100 changes to a certain extent, the terminal device 100 may perform cell switching, and the terminal device 100 needs to search a network again to determine an available working frequency point and perform cell search for the working frequency point. In addition, when the terminal device 100 is in the rebooting or the turning off flight mode, the terminal device 100 also needs to search the network again to determine the working frequency point since the network connection is not established. When the terminal device 100 performs cell search for a specific frequency point, it tries to perform cell camping and sends a registration request to the base station. If the terminal device 100 is successfully registered, it indicates that the terminal device 100 establishes network connection with the base station and successfully resides in the cell corresponding to the base station.

Illustratively, fig. 4A shows a user interface 10 on the terminal device 100 for demonstrating the restart of the terminal device 100. The user interface 12 may include: shutdown control 201 and restart control 202. Wherein:

the power-off control 201 may receive a user operation (e.g., a touch operation), and in response to the detected user operation, the terminal device 100 may power off.

The restart control 202 may receive a user operation (e.g., a touch operation), and in response to the detected user operation, the terminal device 100 may be powered off and then powered on again.

For example, as shown in fig. 4A and 4B, when a finger of a user clicks the restart control 202, the terminal device 100 detects the user operation, and in response to the user operation, the terminal device 100 is powered off and then powered on again, and the terminal device 100 displays the user interface 11 after being powered on. The user interface 10 may include: status bar 301, calendar indicator 302, weather indicator 303, tray 304 with frequently used application icons, navigation bar 305, and other application icons. Wherein:

status bar 301 may include: no signal indicator 301A, battery status indicator 301B, time indicator 301C of a mobile communication signal (which may also be referred to as a cellular signal).

The no-signal indicator 301A is used to indicate that the terminal device 100 has not established a network connection. It will be appreciated that the terminal device 100 has not yet accessed the network when it is just powered on, and therefore the status bar 301 displays the no-signal indicator 301A.

Illustratively, as shown in fig. 4C, when the terminal device 100 successfully establishes a network connection through network searching, the terminal device 100 stops displaying the no-signal indicator 301A, and displays one or more signal strength indicators 301D of the 5G mobile communication signal in the status bar 201, and may also display the operator name 301E in the status bar 201.

When the terminal device 100 needs to search a network, the historical frequency point and/or the cloud preset frequency point recorded by the terminal device 100 are scanned, and cell search can be initiated according to the historical frequency point and/or the cloud preset frequency point. The historical frequency point refers to a frequency point where the terminal device 100 successfully resides. When an effective network cannot be searched according to the history frequency point and/or the cloud preset frequency point, the terminal device 100 may perform full-band search on all frequency bands supported by the terminal device 100. The embodiment of the application provides a network searching method for full-band search. In some embodiments, the SIM card of the terminal device 100 carries a PLMN identifier, and the cloud preset frequency point is determined by the terminal device 100 according to the PLMN identifier.

It should be understood that the network searching method provided by the embodiment of the present application may be executed by the terminal device 100, and specifically relates to a baseband processor in the terminal device 100. The baseband processor may include a physical layer and an RRC layer, among others. Those skilled in the art will appreciate that the steps performed by each protocol layer may be implemented by a baseband processor executing a program containing the corresponding code. Details regarding the physical layer and the RRC layer have been described above.

Referring to fig. 5, fig. 5 is a flowchart of a network searching method according to an embodiment of the present application. As shown in fig. 5, the network searching method provided in the embodiment of the present application includes, but is not limited to, steps S101 to S104. Possible implementations of embodiments of the method are described further below.

S101, the RRC layer of the terminal device 100 sends a frequency sweep command to the physical layer of the terminal device 100.

S102, the physical layer of the terminal device 100 sweeps the frequency band supported by the terminal device 100 based on the synchronous grid, and obtains each SS of the terminal device 100 in the frequency band _REF The received signal strength indication RSSI of the frequency points, for the frequency range of 0 to 3000MHz,SS in each synchronous grid _REF And taking the default value of the M value corresponding to the frequency point.

It should be noted that the frequency sweeping process includes scanning each SS in the designated frequency band _REF Receiving Signal Strength Indicator (RSSI) of frequency point, and obtaining each SS _REF RSSI of frequency bins. Referring to Table 1, frequency range of 0 to 3000MHz, SS _REF The frequency point is determined by the N value and the M value in the synchronous grid; outside the frequency range of 0 to 3000MHz, SS _REF The frequency bins are represented by the N values in the synchronization grid. The corresponding value of M is taken as a default value. Each SS _REF The frequency points are determined by the N and M values in the synchronization grid. In step S102, for the frequency sweep in the frequency range of 0 to 3000MHz, the value M is set to a default value. In the step S102, the sweep step length is equal to the step length of the synchronous grid, and the sweep step length is 1200kHz within the frequency range of 0-3000 MHz; in the frequency range of 3000MHz to 24250MHz, the sweep step length is 1.44MHz; the sweep step size was 17.82MHz over a frequency range of 24250MHz to 100000 MHz.

For example, the default value of the value of M is 3.

S103, the physical layer of the terminal device 100 sends the first S SSs with the maximum RSSI value in the frequency bands supported by the terminal device 100 to the RRC layer of the terminal device 100 _REF And (4) frequency points.

S104, RRC layer of terminal device 100 according to the S SSs _REF The RSSI value of the frequency point is sequentially compared with the S SSs from large to small _REF And the frequency point executes cell search until the frequency point successfully resides in the cell.

For example, S takes the value of 100.

In some embodiments, after receiving 100 frequency points of the physical layer, the RRC layer constructs 28 frequency points according to a protocol, and sequentially performs cell search on the 128 frequency points until successfully camping on a cell.

Referring to table 1, in the frequency range of 0 to 3000MHz, in the same synchronization grid (determined by the N value), since the M value has three values (i.e. 1,3, 5), one synchronization grid can correspond to 3 SSs _REF And (4) frequency points. In the frequency sweeping process of the step 102, the physical layer only acquires the RSSI of the frequency point corresponding to the default value of M in the synchronization grid, and determines whether to report the frequency point to the RRC layer according to the RSSI of the frequency point. Due to smallBefore the cell search, the terminal device 100 does not determine the M value configuration of each cell, and in the cell search process, for the same N value, the terminal device 100 needs to respectively perform 3 SSs corresponding to three M values _REF Frequency point, 3 times of cell search are executed.

For example, the terminal device 100 supports an N1 frequency band, a GSCN range corresponding to the N1 frequency band is 5279 to 5419, and a value range of N corresponding to the GSCN range is 1760 to 1803. The physical layer of the terminal device 100 sweeps the frequency in the N1 frequency band, the value range of N corresponding to each scanned frequency point is 1760 to 1803, and the value of m is 3. For example, the frequency point reported by the terminal device 100 is 2112.15MHz, the N value corresponding to the frequency point is 1760, and the m value is 3. When the terminal device 100 performs cell search based on the frequency point of 2112.15MHz, it needs to perform cell search for 3 times respectively for three frequency points of 2112.15MHz (N value is 1760, m value is 1), 2112.05MHz (N value is 1760, m value is 3) and 2112.25MHz (N value is 1760, m value is 5).

Referring to table 2, one frequency band may support one or more SCS configurations. For example, the n41 frequency band supports two SCS configurations of 15kHz and 30kHz, and frequency point 1 is a frequency point within the n41 frequency band. In some embodiments, since the terminal device 100 does not determine the SCS configurations supported by each cell before cell search, when the terminal device 100 performs cell search based on frequency point 1, it needs to perform cell search twice for two SCS configurations, namely 15kHz and 30 kHz.

For example, the frequency sweep process M takes a default value, the frequency point 1 supports two SCS configurations of 15kHz and 30kHz, the frequency point 1 is equal to 2500.95MHz, the N value corresponding to the frequency point 1 is equal to 2084, and the M value is equal to 3. The RRC layer of the terminal device 100 may construct a frequency point list shown in table 3 based on the frequency point 1, where the frequency point list includes values of 3M (i.e., 1,3, 5) and six search parameters (i.e., SCS configuration and M values) corresponding to two SCS configurations, and when the RRC layer of the terminal device 100 performs cell search based on the frequency point 1, six cell searches need to be performed respectively for the six search parameters shown in table 3.

TABLE 3

Frequency point 1	SCS	M
			2500.85MHz	15kHz		1
2500.95MHz	15kHz						3
			2501.05MHz	15kHz	5
2500.85MHz	30kHz					1
			2500.95MHz	30kHz			3
2501.05MHz	30kHz	5

It should be noted that, for the actual environment where the terminal device 100 is currently located, most of the frequency points in all the frequency bands supported by the terminal device 100 are invalid frequency points. Therefore, the UE may waste a lot of time to perform cell search on invalid frequency points by performing cell search on each frequency point according to the RSSI sorting result. Secondly, a part of frequency points with high RSSI may be caused by noise interference, such frequency points may correspond to cells with poor network quality, and only according to the sequence of the RSSI, the terminal device 100 preferentially performs cell residence on the cell corresponding to the frequency point, so that the terminal device 100 may reside in the cell with poor network quality. In addition, in the same network environment, the same operator usually has only one kind of M and SCS configuration, so that searching for the frequency points with redundant SCS configuration and M value results in long search time and large power consumption, and the terminal device 100 cannot be quickly registered on the network, which is not favorable for user experience.

Referring to fig. 6, fig. 6 is a flowchart of another network searching method according to an embodiment of the present application. As shown in fig. 6, the network searching method provided in the embodiment of the present application includes, but is not limited to, steps S201 to S208. Possible implementations of embodiments of the method are described further below.

S201, the RRC layer of the terminal device 100 sends a sweep frequency command to the physical layer of the terminal device 100.

In some embodiments, when the application processor AP of the terminal device 100 detects that the terminal device 100 is in the flight mode, the application processor AP of the terminal device 100 sends a network searching instruction to the RRC layer of the terminal device 100 to trigger the RRC layer to send the instruction to execute the network searching process. That is, the RRC layer of the terminal device 100 executes step S201 in response to the network searching instruction sent by the application processor AP.

S202, the physical layer of the terminal device 100 sweeps the frequency band supported by the terminal device 100 based on the synchronization grid, and determines the SS corresponding to each GSCN in the GSCN range corresponding to the frequency band supported by the terminal device 100 _REF Frequency point, obtaining the SS _REF And energy information corresponding to the frequency points.

Specifically, the physical layer of the terminal device 100 obtains a GSCN range corresponding to the frequency band supported by the terminal device 100 and a value range of N corresponding to the GSCN range, and determines, according to the value range of N and the value range of M, an SS corresponding to each GSCN in the frequency band supported by the terminal device 100 _REF Frequency point and acquire the SS _REF And energy information corresponding to the frequency points.

It should be noted that, in the embodiment of the present application, the M may also be referred to as a first parameter.

In some embodiments, after receiving the frequency sweep instruction, the physical layer of the terminal device 100 executes frequency sweep and cell search for the historical frequency points and/or the cloud pre-manufactured frequency points recorded by the terminal device 100. When an effective network cannot be searched for at none of the historical frequency points and/or the cloud pre-established frequency points, the physical layer of the terminal device 100 executes step S202.

Referring to table 2, table 2 includes the corresponding relationship between each frequency band and the GSCN range; referring to Table 1, table 1 shows the correspondence of GSCN to N, M, and N, M and SS _REF The corresponding relation of frequency points, wherein, in the frequency range of 0 to 3000MHz, the value range of M is {1,3,5}. Table 2 only shows a correspondence between a part of frequency bands and a GSCN range, and in this embodiment, a GSCN range corresponding to another frequency band may also be included, and table 2 does not limit this embodiment.

For example, the terminal device 100 supports an n1 band, and the GSCN range corresponding to the n1 band is 5279 to 5419. SS corresponding to each GSCN corresponding to n1 frequency band _REF And scanning the frequency points (the value range of N is 1760-1803, and M is 1,3 and 5 respectively for each value of N) to obtain the energy information corresponding to the frequency points. For example, when N is 1760, M is 1, GSCN is 5279, and SS corresponding to GSCN is determined according to N value and M value _REF The frequency point is 2002.05MHz; when N is 1760 and M is 3, GSCN is 5280, and SS corresponding to GSCN is determined according to N value and M value _REF The frequency point is 2002.15MHz; when N is 1760, and M is 5, GSCN is 5281, and SS corresponding to GSCN is determined according to N value and M value _REF The frequency point is 2002.25MHz.

Wherein the energy information may include: RSSI, received Signal Code Power (RSCP), or signal to interference strength ratio Ec/N0 (alternatively referred to as "ECN 0"), etc. Where Ec refers to the energy of the received chips of a single user in a cell), N0 refers to noise interference, and Ec/N0 is commonly used to measure the quality of a pilot channel.

S203, physical layer of terminal device 100 determines each SS _REF PssRatio and SCS configuration corresponding to the frequency point; pssRatio can be used to indicate the probability of a cell existing in this frequency binThe greater PssRatio of a frequency bin, the greater the probability that a cell exists on that frequency bin.

In particular, for the SS supporting various SCS configurations _REF Frequency point, determining the SS according to the SSB corresponding to the frequency point _REF PssRatio and SCS configuration corresponding to the frequency point; for SS supporting one SCS configuration _REF Frequency point according to the SS _REF And determining PssRatio corresponding to the frequency point by the SSB corresponding to the frequency point.

It is understood that referring to Table 2, for SSs corresponding to GSCNs supporting one SCS configuration _REF Frequency point, the physical layer of the terminal equipment 100 can directly determine the SS _REF And SCS configuration corresponding to the frequency points. SS corresponding to GSCN supporting SCS configuration _RE The F frequency point is divided into two cases. In one case, the frequency band corresponding to the frequency point supports only one SCS configuration, for example, the frequency points in the n1 frequency band and the n40 frequency band. In another case, the frequency band corresponding to the frequency point only supports multiple SCS configurations, but the GSCN corresponding to the frequency point only supports one SCS configuration, for example, the n41 frequency band supports two SCS configurations of 15kHz and 30kHz, and the SS corresponding to the GSCN with a value of 6246 in the n41 frequency band _REF Frequency bins support only one SCS configuration.

In some embodiments, the SS determined in step S202 _REF The frequency point 2 in the frequency points supports multiple SCS configurations, and the physical layer of the terminal device 100 determines the SCS configuration corresponding to the frequency point 2, which specifically includes: performing autocorrelation calculation on the first SSB corresponding to the frequency point 2, and performing Fourier transform on an autocorrelation result of the first SSB to obtain a cyclic autocorrelation function of the first SSB corresponding to the frequency point 2; the circular autocorrelation function has the following characteristics: in that

Has a symmetrical peak, where T is the effective data length T of the OFDM symbol of the first SSB,

the first SSB is a corresponding subcarrier interval of the first SSB, wherein k is a positive integer; the terminal device 100 may determine the SCS configuration corresponding to the frequency point 2 according to the cyclic autocorrelation function of the first SSB.

In some embodiments, the terminal device 100 is locally pre-stored with

The three values (0, 1, 2) correspond to the three PSS sequences, respectively. The determining, by the physical layer of the terminal device 100, pssRatio corresponding to the frequency point 2 specifically includes: the terminal device 100 obtains a first PSS sequence in the SSB corresponding to the frequency point 2, and the terminal device 100 performs cross-correlation normalization on the first PSS sequence and the three local PSS sequences, respectively, to obtain 3 cross-correlation normalization values, and determines that a maximum value of the 3 cross-correlation normalization values is PssRatio corresponding to the frequency point 2.

In some embodiments, the terminal device 100 obtains the sampling frequency of the first PSS sequence corresponding to the frequency point 2, and determines the sampling frequency according to the SCS configuration corresponding to the frequency point 2. For example, the SCS corresponding to frequency point 2 is configured to be 15kHz, and the sampling frequency of the first PSS sequence corresponding to frequency point 2 is 15kHz.

In some embodiments, the frequency bin 2 supports multiple SCS configurations, such as a first SCS configuration and a second SCS configuration, and the terminal device 100 is locally pre-stored with

The three values (0, 1, 2) correspond to the three PSS sequences, respectively. The physical layer of the terminal device 100 determines SCS configuration and PssRatio corresponding to the frequency point 2, and specifically includes: the terminal device 100 performs data sampling on the SSB corresponding to the frequency point 2 based on the first SCS configuration to obtain a first PSS sequence corresponding to the frequency point 2, and the terminal device 100 performs cross-correlation normalization on the first PSS sequence and the three local PSS sequences respectively to obtain 3 cross-correlation normalization values corresponding to the first SCS configuration; the terminal device 100 performs data sampling on the SSB corresponding to the frequency point 2 based on the second SCS configuration to obtain a second PSS sequence corresponding to the frequency point 2, and the terminal device 100 performs cross-correlation normalization on the second PSS sequence and the three local PSS sequences, respectively, to obtain 3 cross-correlation normalization values corresponding to the second SCS configuration; determining PssRatio with the maximum value of the 3 cross-correlation normalized values corresponding to the first SCS configuration and the 3 cross-correlation normalized values corresponding to the second SCS configuration as the frequency point 2, and determining the aboveThe first SCS configuration corresponding to the maximum value is the SCS configuration of the frequency point 2.

The same operator usually has only one SCS configuration in the same network environment, and for frequency points in a frequency band supporting multiple SCS configurations, the embodiment of the present application may avoid the terminal device 100 performing cell search on a useless SCS configuration by determining the SCS configuration in advance.

S204, the physical layer of the terminal device 100 sends a first frequency point set to the RRC layer of the terminal device 100, where the first frequency point set includes SSs in the frequency band supported by the terminal device 100 _REF Frequency points, and energy information, pssRatio, SCS configuration and M value corresponding to each frequency point.

S205, the RRC layer of the terminal device 100 determines a third frequency point set from the first frequency point set, and determines 3 SSs corresponding to the same N value and different M values for the frequency points in the frequency range of 0-3000 MHz in the first frequency point set _REF The frequency point with the maximum energy information and the energy information larger than the second threshold value in the frequency points is the frequency point of a third frequency point set, and the SS is recorded _REF M values corresponding to the frequency points; determining SS with energy information larger than a second threshold value aiming at frequency points outside the frequency range of 0-3000 MHz in the first frequency point set _REF The frequency points are the frequency points of the third frequency point set.

It should be noted that, in general, only one M-value configuration is provided for a cell. Referring to table 1, in the frequency range of 0 to 3000MHz, in the same synchronization grid (determined by the N value), since the M value has three values (i.e. 1,3, 5), one synchronization grid can correspond to 3 SSs _REF And (4) frequency points. Terminal device 100 acquires 3 SSs in a synchronization grid _REF Energy information of frequency points, wherein SS with maximum energy information _REF The frequency point has the highest possibility of having a cell. Referring to Table 1, there is only one SS in the same synchronization grid outside the frequency range of 0 to 3000MHz _REF And (4) frequency points.

For example, N is 1760, M is 1,3 or 5, and 3 SSs are determined according to the N and M _REF The frequency points correspond to three frequency points in the same synchronization grid, namely 2002.05MHz (M is 1), 2002.15MHz (M is 3) and 2002.25MHz (M is 5). When the terminal device 100 determines the above-mentioned 3 SSs _REF Energy signal in frequency pointThe frequency point with the maximum information and the energy information larger than the second threshold value is 2002.05MHz, the terminal device 100 adds the 2002.05MHz to the first frequency point set, and records that the M value corresponding to the 2002.05MHz is 1.

In the embodiment of the application, the SS with the energy information smaller than the second threshold is excluded _REF And frequency points, which are used to exclude most invalid frequency points in all frequency bands supported by the terminal device 100, so as to avoid the terminal device 100 wasting time to perform cell search on the invalid frequency points. The same operator usually has only one M value in the same network environment, and the terminal device 100 is prevented from determining the M value in advance for the frequency points in the frequency band supporting multiple M values, so as to avoid the SS corresponding to the useless M value _REF The frequency point performs cell search.

S206, the RRC layer of the terminal device 100 determines a second frequency point set from the third frequency point set, where a frequency point in the second frequency point set, pssRatio, which is greater than the first threshold, is a frequency point of the second frequency point set.

In the embodiment of the present application, frequency points, for which cells do not exist in any approximate frequency bands supported by the terminal device 100, are excluded by excluding frequency points for which PssRatio is smaller than a first threshold. It is avoided that the terminal device 100 wastes time to perform cell search for the frequency points where cells do not exist at the above-described maximum rate.

S207, the RRC layer of the terminal device 100 sorts all the frequency points in the second frequency point set according to the energy information and/or PssRatio of each frequency point in the second frequency point set, so as to generate a frequency point list 1, where the frequency point list 1 includes SCS configuration and M value corresponding to each frequency point.

In some embodiments, the RRC layer of the terminal device 100 orders the frequency bins in the second frequency bin set based on the energy information of each frequency bin and PssRatio. Specifically, the terminal device 100 determines the ranking coefficient of each frequency bin in the second frequency bin set according to the energy information weight coefficient a1 and the weight coefficient a2 of PssRatio. For example, if the energy information of frequency bin 3 in the second frequency bin set is RR1, and PssRatio of frequency bin 3 is Ps1, the ranking coefficient of frequency bin 3 is a1 × RR1+ a2 × Ps1. The RRC layer of the terminal device 100 performs sorting from large to small according to the sorting coefficient of each frequency point in the second frequency point set.

In some embodiments, the RRC layer of the terminal device 100 orders the frequency points in the second frequency point set based on the energy information of each frequency point. In some embodiments, the RRC layer of the terminal device 100 orders the frequency bins in the second frequency bin set based on PssRatio of each frequency bin.

In addition to the above exclusion manner, based on the energy information and PssRatio, other exclusion manners may also be adopted to sequence the frequency points in the second frequency point set in the embodiment of the present application, which is not specifically limited herein.

S208, the RRC layer of the terminal device 100 sequentially performs cell search on the frequency points in the frequency point list 1 until the terminal device successfully camps on the cell.

It should be noted that, the SCS configuration and M value corresponding to each frequency point in the second frequency point set are determined, and each frequency point in the frequency point list 1 has only one search parameter (i.e., SCS configuration and M value). Therefore, the RRC layer of the terminal device 100 only needs to perform cell search once for each frequency bin in the second set of frequency bins.

In some embodiments, after step 203, step S205 and step S206 may also be performed by the physical layer. The physical layer determines a third frequency point set and an M value of each frequency point in a frequency range of 0-3000 kHz from the first frequency point set according to the energy information of each frequency point in the first frequency point set; then, the physical layer determines a second frequency point set from the third frequency point set according to PssRatio of each frequency point in the third frequency point set; and the physical layer sends a second frequency point set to the RRC layer, wherein the second frequency point set comprises energy information, pssRatio, SCS configuration and M values corresponding to the frequency points. Then, the RRC layer performs step S207.

In some embodiments, the terminal device 100 may determine the frequency bin list for cell search based on three parameters, i.e., the energy information, pssRatio, and M value. After step S202, the terminal device 100 executes step S209 to step S214. Wherein:

s209, determining each SS by physical layer of terminal equipment 100 _REF PssRatio corresponding to the frequency point; pssRatio may be used to indicate the probability of a cell existing in the frequency point, and the larger PssRatio the frequency point is, the higher the probability of a cell existing in the frequency point is.

S210, physics of terminal device 100The layer sends a first set of frequency points to the RRC layer of the terminal device 100, where the first set of frequency points includes SSs within a frequency band supported by the terminal device 100 _REF Frequency points, and energy information, pssRatio, N value and M value corresponding to each frequency point.

S211, the RRC layer of the terminal device 100 determines a third frequency point set from the first frequency point set, and determines 3 SSs corresponding to the same N value and different M values for the frequency points in the frequency range of 0-3000 MHz in the first frequency point set _REF The frequency point with the maximum energy information and the energy information larger than the second threshold value in the frequency points is the frequency point of a third frequency point set, and the SS is recorded _REF M values corresponding to the frequency points; determining SS with energy information larger than a second threshold value aiming at frequency points outside the frequency range of 0-3000 MHz in the first frequency point set _REF The frequency points are the frequency points of the third frequency point set.

S212, the RRC layer of the terminal device 100 determines a second frequency point set from the third frequency point set, where a frequency point in the second frequency point set PssRatio greater than the first threshold is a frequency point in the second frequency point set.

S213, the RRC layer of the terminal device 100 sorts all the frequency points in the second frequency point set according to the energy information and/or PssRatio of each frequency point in the second frequency point set, so as to generate a frequency point list 2, where the frequency point list 2 includes M values corresponding to the frequency points.

S214, the RRC layer of the terminal device 100 sequentially performs cell search on the frequency points in the frequency point list 2 until the terminal device successfully camps on the cell.

For example, the second frequency bin set frequency bin 3 supports two SCS configurations, 15kHz and 30kHz, frequency bin 3 equals 2500.95MHZ, the N value for frequency bin 3 equals 2084, and the m value equals 3. For two SCS configurations of the frequency point 3, the frequency point list 2 includes two search parameters shown in table 4, and when the RRC layer of the terminal device 100 performs cell search based on the frequency point 3, it needs to perform cell search twice for the two search parameters shown in table 4, respectively.

TABLE 4

Frequency point 3	SCS	M
			2500.95MHz	15kHz	3
2500.95MHz	30kHz					3

The specific implementation manner of step S209 may refer to the related embodiment of step S203, the specific implementation manner of step S211 may refer to the related embodiment of step S205, and the specific implementation manner of step S213 may refer to the related embodiment of step S207, which is not described herein again.

In some embodiments, the terminal device 100 determines the frequency point list for cell search based on three parameters of energy information, pssRatio, and SCS configuration. After step S201, the terminal device executes steps S215 to S221. Wherein:

s215, the physical layer of the terminal device 100 sweeps the frequency band supported by the terminal device 100 based on the synchronization grid, and acquires each SS in the frequency band of the terminal device 100 _REF RSSI of frequency points, SS in each synchronization grid for frequency range of 0 to 3000MHz _REF And taking the default value of the M value corresponding to the frequency point.

S216, determining each SS by physical layer of terminal equipment 100 _REF PssRatio and SCS configuration corresponding to the frequency point; pssRatio may be used to indicate the probability of a cell existing in the frequency point, and the larger PssRatio the frequency point is, the higher the probability of a cell existing in the frequency point is.

S217, the physical layer of the terminal device 100 sends a first frequency point set to the RRC layer of the terminal device 100, where the first frequency point set includes the frequency points supported by the terminal device 100Supporting intra-band SS _REF Frequency points, and energy information, pssRatio, SCS configuration and M value corresponding to each frequency point.

S218, the RRC layer of the terminal device 100 determines a third frequency point set from the first frequency point set, and determines an SS with energy information greater than a second threshold in the first frequency point set _REF The frequency points are frequency points of a third frequency point set.

S219, the RRC layer of the terminal device 100 determines a second frequency point set from the third frequency point set, where a frequency point in the second frequency point set PssRatio greater than the first threshold is a frequency point of the second frequency point set.

S220, the RRC layer of the terminal device 100 sorts all the frequency points in the second frequency point set according to the energy information and/or PssRatio of each frequency point in the second frequency point set, so as to generate a frequency point list 3, where the frequency point list 3 includes SCS configurations corresponding to the frequency points.

S221, the RRC layer of the terminal device 100 sequentially performs cell search on the frequency points in the frequency point list 3 until the terminal device successfully camps on the cell.

For example, the second frequency bin set includes frequency bin 3, the SCS supported by frequency bin 3 is configured to be 15kHz, frequency bin 3 is equal to 2500.95MHz, the N value corresponding to frequency bin 3 is equal to 2084, and the m value is equal to 3. In the frequency sweeping process, the default value of M is 3, and the frequency point list 3 comprises three search parameters of the frequency point 3 shown in a table 5. When the RRC layer of the terminal device 100 performs cell search based on the frequency point 3, it is necessary to perform cell search twice for three search parameters shown in table 5.

TABLE 5

Frequency point 3	SCS	M
			2500.85MHz	15kHz		1
2500.95MHz	15kHz						3
			2501.05MHz	15kHz	5

The specific implementation manner of step S215 may refer to the related embodiment of step S102, the specific implementation manner of step S216 may refer to the related embodiment of step S203, and the specific implementation manner of step S220 may refer to the related embodiment of step S207, which is not described herein again.

In some embodiments, the terminal device 100 determines the frequency bin list for cell search based on two parameters, i.e., the energy information and PssRatio. After step S201, the terminal device 100 executes step S221 to step S227. Wherein:

s221, the physical layer of the terminal device 100 sweeps the frequency band supported by the terminal device 100 based on the synchronization grid, and obtains each SS in the frequency band of the terminal device 100 _REF Energy information of frequency points, SS in each synchronization grid for frequency range of 0 to 3000MHz _REF And taking the default value of the M value corresponding to the frequency point.

S222, determining each SS by physical layer of terminal equipment 100 _REF PssRatio corresponding to the frequency point; pssRatio may be used to indicate the probability of a cell existing in the frequency point, and the larger PssRatio the frequency point is, the higher the probability of a cell existing in the frequency point is.

S223, the physical layer of the terminal device 100 sends a first frequency point set to the RRC layer of the terminal device 100, where the first frequency point set includes SSs in the frequency band supported by the terminal device 100 _REF Frequency points, and energy information, pssRatio and M values corresponding to each frequency point.

S224, RRC layer of terminal device 100 is from first frequency pointIntensively determining a third frequency point set, and determining the SS with energy information larger than a second threshold value in the first frequency point set _REF The frequency points are frequency points of a third frequency point set.

S225, the RRC layer of the terminal device 100 determines a second frequency point set from the third frequency point set, where a frequency point in the second frequency point set PssRatio greater than the first threshold is a frequency point in the second frequency point set.

S226, the RRC layer of the terminal device 100 sorts all the frequency points in the second frequency point set according to the energy information and/or PssRatio of each frequency point in the second frequency point set, and generates a frequency point list 4.

S227, the RRC layer of the terminal device 100 sequentially performs cell search on the frequency points in the frequency point list 4 until the terminal device successfully camps on the cell.

The specific implementation manner of step S221 may refer to the related embodiment of step S102, the specific implementation manner of step S222 may refer to the related embodiment of step S203, and the specific implementation manner of step S226 may refer to the related embodiment of step S207, which is not described herein again.

It should be noted that, referring to table 3, for a frequency point in the second frequency point set, the frequency point list 4 may include 3M values (i.e. 1,3, 5) of the frequency point and six search parameters corresponding to two SCS configurations. The RRC layer of the terminal device 100 needs to perform six cell searches for the frequency points.

Referring to fig. 7, based on the foregoing embodiment, an embodiment of the present application further provides a network searching method. As shown in fig. 7, the network searching method includes, but is not limited to, steps S301 to S304. Possible implementations of embodiments of the method are described further below.

S301, the terminal device 100 performs cell search on a first frequency point list, where the first frequency point list includes historical frequency points where the terminal device 100 resides.

S302, when the cell search on the first frequency point list fails, the terminal device 100 performs the cell search on a second frequency point list, where the frequency points included in the second frequency point list are preset frequency points.

In some embodiments, the SIM card of the terminal device 100 carries a PLMN identifier, and the preset frequency points in the second frequency point list are determined by the terminal device 100 according to the PLMN identifier.

S303, when the cell search of the second frequency point list fails, the terminal device 100 sweeps the frequency band supported by the terminal device 100, and determines a third frequency point list according to first sweep frequency parameters, wherein the first sweep frequency parameters at least comprise PssRatio; pssRatio is used to indicate the possibility of a cell being present on a frequency bin.

It should be noted that the larger PssRatio of a frequency point is, the higher the possibility that a cell exists in the frequency point is.

S304, the terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list.

The third frequency point list may include the frequency point list 1, the frequency point list 2, the frequency point list 3, or the frequency point list 4 in the foregoing embodiment.

In some embodiments, the first sweep parameter includes PssRatio, and the terminal device 100 determines the frequency bin list for cell search based on PssRatio. The terminal device 100 sweeps the frequency band supported by the terminal device 100, and determines a third frequency band list according to the first sweep parameter, which specifically includes: the terminal device 100 sweeps the frequency band supported by the terminal device 100, and determines a first frequency point set in the frequency band supported by the terminal device 100 and a first sweep parameter corresponding to each frequency point in the first frequency point set; the terminal device 100 determines a second frequency point set from the first frequency point set, wherein PssRatio of frequency points in the second frequency point set is greater than a first threshold; the terminal device 100 sorts the frequency points in the second frequency point set based on the second sweep frequency parameter, and generates a third frequency point list. In some embodiments, the second sweep parameters comprise at least PssRatio. In one implementation, the first parameter takes a default value during the frequency sweep. The first parameter is M in the foregoing embodiment.

Specifically, in the process of sweeping the frequency bands supported by the terminal device 100, reference may be made to the related embodiment of step S203 for how to determine PssRatio of each frequency point.

In some embodiments, the first frequency sweeping parameter further includes energy information, and the terminal device 100 determines a third frequency bin list for cell search based on the two parameters, i.e., the energy information and PssRatio. The terminal device 100 determines a second frequency point set from the first frequency point set, pssRatio of frequency points in the second frequency point set is greater than a first threshold, and energy information of frequency points in the second frequency point set is greater than a second threshold. The second sweep parameters include at least PssRatio and/or energy information. In one implementation, the first parameter takes a default value during the frequency sweep. The third frequency point list may include the frequency point list 4 in the foregoing embodiment.

Specifically, reference may be made to the related embodiment of step S207 in the foregoing embodiment for how to sort the frequency points in the second frequency point set according to PssRatio and/or energy information.

In some embodiments, the first scanning parameter further includes an SCS configuration; the terminal device 100 determines a third frequency bin list for cell search based on two parameters, SCS configuration and PssRatio. The second sweep frequency parameters at least comprise PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point; the above terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: the terminal device 100 sequentially performs cell search for the frequency points in the third frequency point list based on SCS configuration of the frequency points in the third frequency point list. In one implementation, the first parameter takes a default value during the frequency sweeping process.

Specifically, in the process of sweeping the frequency band supported by the terminal device 100, reference may be made to the related embodiment of step S203 for how to determine the SCS configuration of each frequency point.

In some embodiments, the first scan parameter further includes energy information and SCS configuration; the terminal device 100 determines a third frequency bin list for cell search based on three parameters of energy information, SCS configuration, and PssRatio. The second sweep frequency parameters at least comprise PssRatio and/or energy information; the third frequency point list comprises SCS configuration corresponding to each frequency point; the above terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: the terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list based on the SCS configuration of the frequency points in the third frequency point list. In one implementation, the first parameter takes a default value during the frequency sweep. The third frequency point list may include the frequency point list 3 in the foregoing embodiment.

In some embodiments, the first frequency sweeping parameter further includes energy information and a first parameter, and the terminal device 100 determines a third frequency bin list for cell search based on the three parameters, i.e., the energy information, the first parameter, and PssRatio. The first frequency point set comprises a synchronous signal central frequency point SS which is respectively corresponding to three values of the first parameter in a synchronous grid _REF (ii) a The PssRatio of the frequency points in the second frequency point set is larger than a first threshold value, the energy information of the frequency points in the second frequency point set is larger than a second threshold value, and when the synchronous grid corresponding to the first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information in the three frequency points; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters corresponding to each frequency point; the above terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: the terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list. The third frequency point list may include the frequency point list 2 in the foregoing embodiment.

Specifically, in the process of sweeping the frequency band supported by the terminal device 100, reference may be made to the related embodiment of step S205 to determine the first parameter of each frequency point.

In some embodiments, the first frequency sweeping parameter further includes energy information, a first parameter, and an SCS configuration, and the terminal device 100 determines a third frequency point list for cell search based on the four parameters, i.e., the energy information, the first parameter, the SCS configuration, and PssRatio. The first frequency point set comprises a synchronous signal central frequency point SS corresponding to three values of the first parameter in a synchronous grid respectively _REF (ii) a PssRatio of the frequency points in the second frequency point set is larger than a first threshold value, energy information of the frequency points in the second frequency point set is larger than a second threshold value, and when the synchronous grids corresponding to the first frequency points in the second frequency point set comprise three frequency points corresponding to three values of the first parameter, the first frequency points are the frequency points with the maximum energy information in the three frequency pointsPoint; the second frequency sweeping parameters at least comprise PssRatio and/or energy information, and the third frequency point list comprises first parameters and SCS configuration corresponding to each frequency point; the above terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes: the terminal device 100 sequentially performs cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list. In one implementation, the first parameter takes a default value during the frequency sweep.

Based on the related descriptions in the foregoing embodiments, the following describes related products, such as chips, devices, and the like, to which the present application is applied. Fig. 8 is a schematic structural diagram of a system chip according to an embodiment of the present invention. The system chip 300 shown in fig. 8 includes an application processor 301 (AP) and a baseband processor 302 (BP).

Wherein the content of the first and second substances,

the application processor is called a Multimedia Application Processor (MAP), and refers to a very large scale integrated circuit (lsi) that expands audio and video functions and a dedicated interface on the basis of a Central Processing Unit (CPU) with low power consumption. Application processors are largely divided into three categories, which may include a full-face processor, a multimedia-type processor, and a single media-type processor. The full-face processor has the function of a multimedia application processor, i.e. a processor that processes more than two media, such as images, sounds, videos, and 3D graphics, and can also run a complex operating system like linux. A single multimedia type processor refers to a processor that processes one medium, generally only for processing images or sound.

The baseband processor is an important component in a system chip, is equivalent to a protocol processor, is responsible for processing and storing data, mainly comprises units such as a Digital Signal Processor (DSP), a Microcontroller (MCU), and a memory (e.g., flash memory), and has corresponding main functions of being responsible for baseband encoding or decoding, voice encoding, and voice encoding, etc. Currently, baseband processors not only support multiple communication standards (e.g., GSM, LTE, CDMA, 5G NR, etc.), but also provide multimedia functions and provide related communication interfaces for multimedia displays, image sensors, and audio devices.

In practical applications, the software supported by the application processor AP generally includes an operating system, a user interface, an application program, and the like. The baseband processor BP can be regarded as a wireless modem module, and is responsible for coordinating and controlling communication between the BP and the base station and the AP, and the software supported to run includes communication control software of the baseband modem, etc.

The application processor AP and the baseband processor BP support mutual communication by using a preset interface technology, and the interface technology may be set by a system user, and for example, the interface technology includes, but is not limited to, interface technologies such as a Serial Peripheral Interface (SPI), a universal asynchronous receiver/transmitter (UART), a Universal Serial Bus (USB), and a general input/output control line (GPIO). Specifically, the application processor and the baseband processor can realize mutual communication transmission in a message format through a control command so as to complete functions of conversation, short message, mobile internet access and the like. The control command may include a conventional AT (association) command, a Mobile Broadband Interface (MBIM) command, or other protocol commands supporting mutual transmission between AP and BP.

Alternatively, the baseband processor BP supports running protocol software related to the physical layer and the RRC layer as shown in fig. 8. In practical applications, the application processor AP supports communication with the physical layer and the RRC layer in the baseband processor BP. For example, in the present application, the AP may send a corresponding signaling message to the RRC layer by using a conventional AT command, so as to notify the RRC layer of information such as an application state (for example, the terminal device 100 is powered on, and the terminal device 100 is powered off in the flight mode) known by the current AP, and trigger the RRC layer to execute a network searching procedure.

Optionally, the physical layer in the baseband processor BP supports the execution of the method steps described above in the method embodiment of any of fig. 5 to 7, with the physical layer being the execution subject, and/or other technical content described herein. The RRC layer in the baseband processor BP supports the execution of the method steps described above with respect to the RRC layer in any of the method embodiments described in fig. 5-7, and/or other technical content described herein.

In practical applications, the system chip 1000 generally refers to a highly complex system chip, such as an SOC chip. In actual deployment, the device can be deployed inside the device or outside the device, and the control of the device is realized through wired connection or wireless connection. The device includes, but is not limited to, a UE or a terminal device, which may specifically include a smart phone, a Mobile Internet Device (MID), a wearable smart device or other device supporting network communication, for example. In particular, when the system chip 1000 is deployed inside a terminal device, the system chip 1000 is directly used for implementing the method described in the method embodiment in any of fig. 5 to 7. When the system chip 1000 is deployed outside the terminal device and supports establishing communication between the system chip 1000 and the terminal device by means of wired or wireless connection, the terminal device implements the method described in any one of the method embodiments in fig. 5 to fig. 7 by calling or controlling the system chip 1000.

By implementing the embodiment of the invention, the problems of long time consumption, high equipment power consumption, incapability of quickly registering to a network and the like in the network searching process in the traditional technology can be solved.

For the convenience of understanding the embodiment of the present application, a terminal device to which the embodiment of the present application is applied will be described by taking the terminal device 100 shown in fig. 9 as an example.

Referring to fig. 9, fig. 9 shows a schematic structural diagram of an exemplary terminal device 100 provided in an embodiment of the present application.

The terminal device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identity Module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

It is to be understood that the illustrated structure of the embodiment of the present invention does not specifically limit the terminal device 100. In other embodiments of the present application, terminal device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), among others. Wherein, the different processing units may be independent devices or may be integrated in one or more processors.

The controller may be a neural center and a command center of the terminal device 100, among others. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose-input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

It should be understood that the connection relationship between the modules according to the embodiment of the present invention is only illustrative, and does not limit the structure of the terminal device 100. In other embodiments of the present application, the terminal device 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The charging management module 140 is configured to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger via the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the terminal device 100. The charging management module 140 may also supply power to the electronic device through the power management module 141 while charging the battery 142.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140 and provides power to the processor 110, the internal memory 121, the external memory, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In other embodiments, the power management module 141 may be disposed in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may be disposed in the same device.

The wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The

antennas

1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in terminal device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may 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 may provide a solution including wireless communication of 2G/3G/4G/5G, etc. applied to the terminal device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.

The wireless communication module 160 may provide a solution for wireless communication applied to the terminal device 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.

In some embodiments, the antenna 1 of the terminal device 100 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 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), long Term Evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

The terminal device 100 implements a display function by the GPU, the display screen 194, and the application processor, etc. The GPU is a microprocessor for image processing, connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the terminal device 100 may include 1 or N display screens 194, N being a positive integer greater than 1.

The terminal device 100 can implement a photographing function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, and the application processor, etc.

The ISP is used to process the data fed back by the camera 193. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be provided in camera 193.

The camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV and other formats. In some embodiments, the terminal device 100 may include 1 or N cameras 193, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the terminal device 100 selects a frequency point, the digital signal processor is used to perform fourier transform or the like on the frequency point energy.

Video codecs are used to compress or decompress digital video. The terminal device 100 may support one or more video codecs. In this way, the terminal device 100 can play or record video in a plurality of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor, which processes input information quickly by referring to a biological neural network structure, for example, by referring to a transfer mode between neurons of a human brain, and can also learn by itself continuously. The NPU can implement applications such as intelligent recognition of the terminal device 100, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the terminal device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The internal memory 121 may be used to store computer-executable program code, which includes instructions. The processor 110 executes various functional applications of the terminal device 100 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, a phonebook, etc.) created during use of the terminal device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like.

The terminal device 100 may implement an 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 playing, recording, etc.

The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or some functional modules of the audio module 170 may be disposed in the processor 110.

The speaker 170A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The terminal device 100 can listen to music through the speaker 170A, or listen to a handsfree call.

The receiver 170B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. When the terminal device 100 answers a call or voice information, it is possible to answer a voice by bringing the receiver 170B close to the human ear.

The microphone 170C, also referred to as a "microphone," is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can input a voice signal to the microphone 170C by speaking near the microphone 170C through the mouth. The terminal device 100 may be provided with at least one microphone 170C. In other embodiments, the terminal device 100 may be provided with two microphones 170C, which may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the terminal device 100 may further include three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and implement directional recording functions.

The earphone interface 170D is used to connect a wired earphone. The headset interface 170D may be the USB interface 130, or may be a 3.5mm open mobile electronic device platform (OMTP) standard interface, a cellular telecommunications industry association (cellular telecommunications industry association) standard interface of the USA.

The pressure sensor 180A is used for sensing a pressure signal, and can convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A may be disposed on the display screen 194. The pressure sensor 180A can be of a wide variety, such as a resistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, and the like. The capacitive pressure sensor may be a sensor comprising at least two parallel plates having an electrically conductive material. When a force acts on the pressure sensor 180A, the capacitance between the electrodes changes. The terminal device 100 determines the strength of the pressure from the change in capacitance. When a touch operation is applied to the display screen 194, the terminal device 100 detects the intensity of the touch operation according to the pressure sensor 180A. The terminal device 100 may also calculate the touched position from the detection signal of the pressure sensor 180A. In some embodiments, touch operations that are applied to the same touch position but have different touch operation intensities may correspond to different operation instructions. For example: and when the touch operation with the touch operation intensity smaller than the first pressure threshold value acts on the short message application icon, executing an instruction for viewing the short message. And when the touch operation with the touch operation intensity larger than or equal to the first pressure threshold value acts on the short message application icon, executing an instruction of newly building the short message.

The gyro sensor 180B may be used to determine the motion attitude of the terminal device 100.

The air pressure sensor 180C is used to measure air pressure.

The magnetic sensor 180D includes a hall sensor.

The acceleration sensor 180E can detect the magnitude of acceleration of the terminal device 100 in various directions (generally, three axes). The magnitude and direction of gravity can be detected when the terminal device 100 is stationary. The method can also be used for recognizing the posture of the electronic equipment, and is applied to horizontal and vertical screen switching, pedometers and other applications.

A distance sensor 180F for measuring a distance.

The proximity light sensor 180G may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode.

The ambient light sensor 180L is used to sense the ambient light level.

The fingerprint sensor 180H is used to collect a fingerprint. The terminal device 100 can utilize the collected fingerprint characteristics to realize fingerprint unlocking, access to an application lock, fingerprint photographing, fingerprint incoming call answering and the like.

The temperature sensor 180J is used to detect temperature. In some embodiments, the terminal device 100 executes a temperature processing policy using the temperature detected by the temperature sensor 180J.

The touch sensor 180K is also referred to as a "touch panel". The touch sensor 180K may be disposed on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, which is also called a "touch screen". The touch sensor 180K is used to detect a touch operation applied thereto or nearby. The touch sensor can communicate the detected touch operation to the application processor to determine a touch event type. Visual output associated with the touch operation may be provided through the display screen 194. In other embodiments, the touch sensor 180K may be disposed on the surface of the terminal device 100, different from the position of the display screen 194.

The bone conduction sensor 180M may acquire a vibration signal. In some embodiments, the bone conduction sensor 180M may acquire a vibration signal of the human voice vibrating a bone mass. The bone conduction sensor 180M may also contact the human pulse to receive the blood pressure pulsation signal. In some embodiments, bone conduction sensor 180M may also be provided in a headset, integrated into a bone conduction headset. The audio module 170 may analyze a voice signal based on the vibration signal of the bone mass vibrated by the sound part acquired by the bone conduction sensor 180M, so as to implement a voice function. The application processor can analyze heart rate information based on the blood pressure beating signal acquired by the bone conduction sensor 180M, so that the heart rate detection function is realized.

The keys 190 include a power-on key, a volume key, and the like. The keys 190 may be mechanical keys. Or may be touch keys. The terminal device 100 may receive a key input, and generate a key signal input related to user setting and function control of the terminal device 100.

The motor 191 may generate a vibration cue. The motor 191 may be used for incoming call vibration cues, as well as for touch vibration feedback. For example, touch operations applied to different applications (e.g., photographing, audio playing, etc.) may correspond to different vibration feedback effects. The motor 191 may also respond to different vibration feedback effects when it is used for touch operations in different areas of the display screen 194. Different application scenes (such as time reminding, receiving information, alarm clock, game and the like) can also correspond to different vibration feedback effects. The touch vibration feedback effect may also support customization.

Indicator 192 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be attached to and detached from the terminal device 100 by being inserted into the SIM card interface 195 or being pulled out of the SIM card interface 195. The terminal device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. The same SIM card interface 195 can be inserted with multiple cards at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 is also compatible with different types of SIM cards. The SIM card interface 195 is also compatible with external memory cards. The terminal device 100 interacts with the network through the SIM card to implement functions such as communication and data communication. In some embodiments, the terminal device 100 employs eSIM, namely: an embedded SIM card. The eSIM card may be embedded in the terminal device 100 and cannot be separated from the terminal device 100.

The embodiment of the application also provides a computer readable storage medium. The methods described in the above method embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media may include both computer storage media and communication media, and may include any medium that can transfer a computer program from one place to another. A storage media may be any available media that can be accessed by a computer.

As an alternative design, a computer-readable storage medium may include RAM, ROM, EEPROM, CD-ROM or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium.

The embodiment of the application also provides a computer program product. The methods described in the above method embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in the above method embodiments may be wholly or partially generated when the above computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A network searching method is characterized by comprising the following steps:

the method comprises the steps that a terminal device conducts cell search on a first frequency point list, wherein the first frequency point list comprises historical frequency points where the terminal device resides;

when the cell search of the first frequency point list fails, the terminal equipment searches a second frequency point list for the cell, wherein the frequency points in the second frequency point list are preset frequency points;

when the cell search of the second frequency point list fails, the terminal equipmentFrequency sweeping is carried out on the frequency bands supported by the terminal equipment, and a third frequency band list is determined according to first frequency sweeping parameters, wherein the first frequency sweeping parameters at least comprise a primary synchronization signal ratio PssRatio; the PssRatio is based on a synchronization signal center frequency point SS in the frequency band _REF The PSSRatio is used for indicating the possibility of the existence of the cell on the frequency point;

and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list.

2. The method according to claim 1, wherein the terminal device sweeps frequency bands supported by the terminal device, and determines the third frequency band list according to the first sweep parameter, specifically comprising:

the terminal device sweeps the frequency band supported by the terminal device, and a first frequency point set in the frequency band supported by the terminal device and the first sweep frequency parameter corresponding to each frequency point in the first frequency point set are determined;

the terminal equipment determines a second frequency point set from the first frequency point set, wherein PssRatio of frequency points in the second frequency point set is greater than a first threshold value;

and the terminal equipment sorts the frequency points in the second frequency point set based on a second frequency sweep parameter to generate a third frequency point list, wherein the second frequency sweep parameter comprises PssRatio and/or energy information.

3. The method of claim 2, wherein the first sweep parameter further comprises energy information; and PssRatio of the frequency points in the second frequency point set is greater than the first threshold, and the energy information of the frequency points in the second frequency point set is greater than a second threshold.

4. The method of claim 2, wherein the first scanning parameters further comprise SCS configurations; the second sweep parameter at least comprises the PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point;

the terminal device sequentially performs cell search on the frequency points in the third frequency point list, and specifically includes:

and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list based on the SCS configuration of the frequency points in the third frequency point list.

5. The method of claim 2, wherein the first sweep parameters further include energy information and a first parameter, and the first frequency bin set includes synchronization signal center frequency bins (SS) corresponding to three values of the first parameter in a synchronization grid _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than the first threshold, the energy information of the frequency points in the second frequency point set is greater than a second threshold, and when a synchronous grid corresponding to a first frequency point in the second frequency point set comprises three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the maximum energy information in the three frequency points; the second sweep frequency parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters corresponding to each frequency point;

and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

6. The method of claim 2 wherein the first sweep parameters further include energy information, a first parameter, and SCS configuration, and wherein the first set of frequency bins includes center frequency bins SS of the synchronization signal corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a PssRatio of the frequency points in the second frequency point set is greater than the first threshold, energy information of the frequency points in the second frequency point set is greater than a second threshold, and when a synchronous grid corresponding to a first frequency point in the second frequency point set comprises three values of the first parameterWhen the energy information of the three frequency points is not greater than the maximum energy information, the first frequency point is the frequency point with the maximum energy information; the second sweep frequency parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters and the SCS configuration corresponding to each frequency point;

and the terminal equipment sequentially executes cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list.

7. The method according to any of claims 1 to 6, wherein a Subscriber Identity Module (SIM) card of the terminal device carries a Public Land Mobile Network (PLMN) identifier, and the preset frequency points in the second frequency point list are determined by the terminal device according to the PLMN identifier.

8. A communication device comprising one or more processors, and a computer storage medium; wherein the one or more processors are coupled with the computer storage medium, the computer storage medium having computer instructions stored thereon, which when executed by the one or more processors, cause the communication device to perform:

performing cell search on a first frequency point list, wherein the first frequency point list comprises historical frequency points where the communication equipment resides;

when the cell search of the first frequency point list fails, performing cell search on a second frequency point list, wherein the frequency points included in the second frequency point list are preset frequency points;

when the cell search of the second frequency point list fails, frequency sweeping is carried out on the frequency bands supported by the communication equipment, and a third frequency point list is determined according to first frequency sweeping parameters, wherein the first frequency sweeping parameters at least comprise PssRatio; the PssRatio is based on a synchronization signal center frequency point SS in the frequency band _REF Corresponding PSS sequence and local PSS sequence, said PThe ssRatio is used for indicating the possibility of the existence of a cell on a frequency point;

and sequentially executing cell search on the frequency points in the third frequency point list.

9. The apparatus according to claim 8, wherein the frequency sweeping the frequency band supported by the communication apparatus, and determining the third frequency band list according to the first frequency sweeping parameter includes:

frequency sweeping is carried out on the frequency band supported by the communication equipment, and a first frequency point set in the frequency band supported by the communication equipment and the first frequency sweeping parameter corresponding to each frequency point in the first frequency point set are determined;

determining a second frequency point set from the first frequency point set, wherein PssRatio of frequency points in the second frequency point set is greater than a first threshold value;

and sequencing the frequency points in the second frequency point set based on a second frequency sweep parameter to generate a third frequency point list, wherein the second frequency sweep parameter comprises PssRatio and/or energy information.

10. The communications device of claim 9, wherein the first sweep parameter further includes energy information; and PssRatio of the frequency points in the second frequency point set is greater than the first threshold, and the energy information of the frequency points in the second frequency point set is greater than a second threshold.

11. The communications device of claim 9, wherein the first frequency sweeping parameter further comprises an SCS configuration; the second sweep parameter comprises at least the PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point;

the sequentially performing cell search on the frequency points in the third frequency point list specifically includes:

and sequentially executing cell search on the frequency points in the third frequency point list based on the SCS configuration of the frequency points in the third frequency point list.

12. The method of claim 9The communication equipment is characterized in that the first scanning parameters also comprise energy information and first parameters, and the first frequency point set comprises synchronous signal central frequency points SS which are respectively corresponding to three values of the first parameters in a synchronous grid _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than the first threshold, the energy information of the frequency points in the second frequency point set is greater than a second threshold, and when a synchronization grid corresponding to a first frequency point in the second frequency point set includes three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information among the three frequency points; the second sweep frequency parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters corresponding to each frequency point;

and sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

13. The communications device of claim 9, wherein the first scanning parameters further include energy information, a first parameter, and SCS configuration, and wherein the first set of frequency bins includes SS sync center frequency bins corresponding to three values of the first parameter, respectively, in a sync grid _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than the first threshold, the energy information of the frequency points in the second frequency point set is greater than a second threshold, and when a synchronization grid corresponding to a first frequency point in the second frequency point set includes three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information among the three frequency points; the second sweep frequency parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters and the SCS configuration corresponding to each frequency point;

and sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list.

14. The communication device according to any one of claims 8 to 13, wherein a SIM card of the communication device carries a PLMN identifier, and the preset frequency point in the second frequency point list is determined by the communication device according to the PLMN identifier.

15. A chip comprises a baseband processor and an application processor, wherein the baseband processor and the application processor are communicated with each other by adopting a preset interface technology,

the baseband processor is used for carrying out cell search on a first frequency point list, wherein the first frequency point list comprises historical frequency points where the terminal equipment resides;

when the cell search of the first frequency point list fails, the baseband processor is also used for carrying out cell search on a second frequency point list, wherein the frequency points included in the second frequency point list are preset frequency points;

when the cell search of the second frequency point list fails, the baseband processor is further configured to sweep frequencies supported by the terminal device, and determine a third frequency point list according to first sweep parameters, where the first sweep parameters at least include PssRatio; the PssRatio is based on a synchronization signal center frequency point SS in the frequency band _REF The PSS sequence and the local PSS sequence are determined correspondingly, and the PssRatio is used for indicating the possibility that the cell exists on the frequency point;

and the baseband processor is further used for sequentially executing cell search on the frequency points in the third frequency point list.

16. The chip according to claim 15, wherein the baseband processor is further configured to sweep frequency bands supported by the terminal device, and determine a third frequency band list according to the first sweep frequency parameter, including:

the baseband processor is further configured to sweep the frequency band supported by the terminal device, and determine a first frequency point set in the frequency band supported by the terminal device and the first sweep frequency parameter corresponding to each frequency point in the first frequency point set;

the baseband processor is further configured to determine a second frequency point set from the first frequency point set, where PssRatio of frequency points in the second frequency point set is greater than a first threshold;

the baseband processor is further configured to sort the frequency points in the second frequency point set based on a second frequency sweep parameter, and generate a third frequency point list, where the second frequency sweep parameter includes PssRatio and/or energy information.

17. The chip according to claim 16, wherein the first scan parameter further comprises energy information; and PssRatio of the frequency points in the second frequency point set is greater than the first threshold, and the energy information of the frequency points in the second frequency point set is greater than a second threshold.

18. The chip of claim 16, wherein the first scanning parameters further comprise SCS configuration; the second sweep parameter at least comprises the PssRatio; the third frequency point list comprises SCS configuration corresponding to each frequency point;

the baseband processor is further configured to sequentially perform cell search on the frequency points in the third frequency point list, including:

and the baseband processor is also used for sequentially executing cell search on the frequency points in the third frequency point list based on SCS configuration of the frequency points in the third frequency point list.

19. The chip of claim 16, wherein the first sweep parameters further include energy information and a first parameter, and the first frequency bin set includes a synchronization signal center frequency bin SS corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a PssRatio of the frequency points in the second frequency point set is greater than the first threshold, and energy information of the frequency points in the second frequency point set is greater than the second thresholdA second threshold, wherein when the synchronization grid corresponding to a first frequency point in the second frequency point set includes three frequency points corresponding to three values of the first parameter, the first frequency point is a frequency point with the largest energy information among the three frequency points; the second sweep frequency parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters corresponding to each frequency point;

and the baseband processor is further used for sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters of the frequency points in the third frequency point list.

20. The chip of claim 16, wherein the first frequency sweeping parameter further includes energy information, a first parameter and SCS configuration, and the first frequency bin set includes center frequency bins SS of a synchronization signal corresponding to three values of the first parameter in a synchronization grid, respectively _REF (ii) a The PssRatio of the frequency points in the second frequency point set is greater than the first threshold, the energy information of the frequency points in the second frequency point set is greater than a second threshold, and when a synchronization grid corresponding to a first frequency point in the second frequency point set includes three frequency points corresponding to three values of the first parameter, the first frequency point is the frequency point with the largest energy information among the three frequency points; the second frequency sweeping parameters at least comprise the PssRatio and/or the energy information, and the third frequency point list comprises the first parameters corresponding to each frequency point and the SCS configuration;

and the baseband processor is further used for sequentially executing cell search on the frequency points in the third frequency point list based on the first parameters and SCS configuration of the frequency points in the third frequency point list.

21. The chip according to any one of claims 15 to 20, wherein a SIM card of the terminal device carries a PLMN identifier, and the preset frequency point in the second frequency point list is determined by the terminal device according to the PLMN identifier.

22. A computer storage medium comprising computer instructions which, when run on a terminal device, cause the terminal device to perform the method of any one of claims 1 to 7.