CN115696487A

CN115696487A - Cell selection method, cell selection device, and storage medium

Info

Publication number: CN115696487A
Application number: CN202110832556.7A
Authority: CN
Inventors: 吴丹; 祁建锋
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2023-02-03

Abstract

The present disclosure relates to a cell selection method, a cell selection apparatus, and a storage medium. In a cell selection method, comprising: and under the condition that the network system of the user equipment is switched from the first network system to the second network system, reselecting the resident cell based on a first cell resident threshold and the signal quality of the anchor cell, wherein the first cell resident threshold is higher than a second cell resident threshold, the second cell resident threshold is a cell resident threshold specified by a protocol, and the anchor cell is the cell where the user equipment resides in the first network system. By the method and the device, the user equipment is ensured to quickly determine the resident cell after network type switching, and the user internet experience is improved.

Description

Cell selection method, cell selection device, and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a cell selection method, a cell selection apparatus, and a storage medium.

Background

In the related art, a wireless communication network can provide multiple network standards, and a user can switch between different network standards according to communication requirements, for example, two network standards are selected from the multiple network standards and are respectively a first network standard and a second network standard, but a resident cell needs to be reselected to provide transmission resources for user equipment due to different network support capabilities of the user equipment in the first network standard and the second network standard. The defect that the user cannot surf the internet for a long time exists in the process of reselecting the resident cell.

For example, in a Non-independent Networking (NSA), a first network type is 5G, a second network type is 4G, a 5G base station supporting the first network type, a 4G base station supporting the first network type, and a 4G core network are both accessed, and if a user equipment is connected to the 5G base station, a 4G base station is required to be used as an "anchor point". However, not all 4G base stations can be used as anchor points, that is, only 4G cells supporting the specified frequency band can be used as anchor cells. In the NSA network, there is a directional handover function for directional handover of a user from a non-anchor cell to an anchor cell with the best signal strength as long as the user equipment is identified as a 5G user.

In the NAS network, a User adjusts a network type of User Equipment (UE) through a 5G switch to switch from 5G to 4G, and in a network type switching process, because a network support capability of the UE is changed, a defect that the User cannot surf the internet for a long time exists in a process of selecting a residential cell, resulting in poor User experience.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a cell selection method, a cell selection apparatus, and a storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a cell selection method, including:

in response to the fact that the network standard of the user equipment is switched from a first network standard to a second network standard, determining a first cell residence threshold of the user equipment, wherein the first cell residence threshold is higher than a second cell residence threshold, and the second cell residence threshold is a cell residence threshold specified by a protocol; and reselecting the resident cell based on the first cell resident threshold and the signal quality of the anchor cell, wherein the anchor cell is the cell in which the user equipment resides in the first network mode.

In one embodiment, reselecting the camped cell based on the first cell camping threshold and the signal quality of the anchor cell comprises:

and if the signal quality of the anchor cell is lower than the residence threshold of the first cell, stopping residence in the anchor cell, performing network scanning of the second network standard, and reselecting the resident cell in the cells of the second network standard.

and if the signal quality of the anchor cell is greater than or equal to the first cell residence threshold value, sending a tracking area updating request and sending a wireless resource control request to reselect the resident cell.

In one embodiment, the first cell camping threshold is preset as follows:

and determining a first cell residence threshold value of the user equipment based on the index grade representing the signal quality, wherein the first cell residence threshold value meets the service requirement of the user equipment for communication.

In one embodiment, detecting that a network standard of a user equipment is switched from a first network standard to a second network standard includes:

and in response to detecting that a first network type switch on the user equipment is closed, determining that the network type of the user equipment is switched from the first network type to a second network type.

According to a second aspect of the embodiments of the present disclosure, there is provided a cell selection apparatus, including:

the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining a first cell residence threshold of user equipment in response to the detection that the network system of the user equipment is switched from a first network system to a second network system, the first cell residence threshold is higher than a second cell residence threshold, and the second cell residence threshold is a cell residence threshold specified by a protocol; a selecting unit, configured to reselect a camped cell based on the first cell camping threshold and a signal quality of an anchor cell, where the anchor cell is a cell in which the user equipment camps in the first network system.

In one embodiment, the selection unit is configured to:

In one embodiment, the first cell residence threshold is preset as follows:

In one embodiment, the determining unit is configured to:

According to a third aspect of the embodiments of the present disclosure, there is provided a cell selection apparatus, including:

a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the first aspect or the cell selection method as described in any of the embodiments of the first aspect.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a storage medium having instructions stored therein, where the instructions when executed by a processor of a user equipment enable the user equipment to perform the cell selection method described in the first aspect or any one of the first aspect implementation manners.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: under the condition that the network system of the user equipment is detected to be switched from the first network system to the second network system, the resident cell is reselected based on the resident threshold of the first cell and the signal quality of the anchor cell, so that the user equipment is ensured to quickly determine the resident cell after the network system is switched, and the user internet surfing experience is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of an NSA network shown in accordance with an example embodiment.

Fig. 2 is a flow chart illustrating a method of cell selection in accordance with an example embodiment.

Fig. 3 is a flow chart illustrating a method of cell selection in accordance with an example embodiment.

Fig. 4 is a flow chart illustrating a method of cell selection in accordance with an example embodiment.

Fig. 5 is a flow chart illustrating a method of cell selection in accordance with an example embodiment.

Fig. 6 is a block diagram illustrating a cell selection apparatus according to an example embodiment.

Fig. 7 is a block diagram illustrating an apparatus for cell selection in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the related art, different network systems can be used for communication among user equipment. Such as Code Division Multiple Access (CDMA), wideband Code Division Multiple Access (WCDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single Carrier frequency division Multiple Access (SC-FDMA), carrier Sense Multiple Access/Collision Avoidance (Carrier Sense Multiple Access with colloid Access). Network types can be classified into 2G (english: generation) networks, 3G networks, 4G networks, 5G networks or future evolution networks according to factors such as capacity, rate and time delay of different networks.

A User may perform switching of different network types on User Equipment (UE) according to a communication requirement, but network support capabilities of the UE are different in different network types, so the UE needs to reselect a residential cell to provide a transmission resource for the UE. The defect that the user cannot surf the internet for a long time exists in the process of reselecting the resident cell.

For convenience of description, any two different network types among multiple network types supported by the UE are referred to as a first network type and a second network type.

For example, in a Non-independent Networking (NSA), the first network standard is 5G, the second network standard is 4G, and both the 5G base station supporting the first network standard and the 4G base station supporting the second network standard access a 4G core network. Fig. 1 is a schematic diagram of an NSA network shown in accordance with an example embodiment. Referring to fig. 1, if a UE is connected to a 5G base station, a 4G base station is required as an "anchor". In fig. 1, a solid line represents a signaling layer, a dotted line represents a data layer, and referring to fig. 1, a 4G base station serving as an anchor point is a messenger between a 5G base station and a 4G core network, and a control signaling sent by the 4G core network is transmitted to the 5G base station through the 4G base station or transmitted to a mobile phone of a user. However, not all 4G base stations can serve as anchor points, that is, only 4G cells supporting a specific frequency band (F frequency band and FDD1800 frequency band) can serve as anchor points. Only the anchor cell can help the user to access the 5G network, and in order to better serve the user, there is therefore a directional handover function in the NSA network for the user to be directionally handed over from the non-anchor cell to the anchor cell with the best signal strength as long as it is identified that the UE is a 5G user.

In the disclosed embodiment, the 4G base station, the 5G base station and the 4G core network all belong to network devices, which can provide communication coverage for a specific geographic area and can communicate with UEs located in the coverage area (cell). The network device provides a service for a cell, and the UE communicates with the network device through a transmission resource (e.g., a frequency domain resource) used by the cell, which may be a cell corresponding to the network device (e.g., a base station). Wherein a cell may belong to a base station.

Further, the UE referred to in the embodiments of the present disclosure may also be referred to as a Terminal device, a Terminal, a Mobile Station (MS), a Mobile Terminal (MT), and the like, and is a device that provides voice and/or data connectivity to a user, for example, the UE may be a handheld device, a vehicle-mounted device, and the like having a wireless connection function. Currently, some examples of UEs are: a smart Phone (Mobile Phone), a Pocket Computer (PPC), a palm top Computer, a Personal Digital Assistant (PDA), a notebook Computer, a tablet Computer, a wearable device, or a vehicle-mounted device, etc. It should be understood that the embodiments of the present disclosure do not limit the specific technology and the specific device form adopted by the UE.

In the NSA network mode, when it is monitored that the 5G switch is turned on by the user, the UE may switch from the non-anchor cell to the anchor cell for camping, but the signal quality of the anchor cell may not be higher than that of the non-anchor cell. For example, in the case where there is only one anchor cell or all anchor cells in the area to which the 5G user belongs have poor signal quality, the UE may attempt to camp on the anchor cell because the cell camping condition can be satisfied despite the poor signal quality of the anchor cell. In the above situation, when the network system of the UE enters 4G from 5G, the UE still resides in the original anchor cell because the anchor cell is the same as a Long Term Evolution (LTE) cell in the 4G network system. Meanwhile, as the network support capability of the UE is changed, the UE may actively initiate a Tracking Area Update (TAU) request and a Radio Resource Control (RRC) connection establishment request, but the UE may not establish an RRC connection with the network of the anchor cell because of poor signal quality of the anchor cell, and the UE may always initiate a connection request to the network of the anchor cell until entering an Out of Service (OOS) state, and then restart scanning the network.

In the above process, the UE cannot establish RRC connection with the network of the anchor cell, but the process that the UE always initiates a connection request to the network of the anchor cell wastes time and power (the UE continuously increases the transmission power to try to establish RRC connection with the network), so that the user is in an anchor cell with poor signal quality for a long time (up to tens of seconds), is basically in a cut-off state, and cannot surf the internet. Meanwhile, the OOS is triggered when the RRC connection establishment fails for a certain number of times, and then the network scanning process is started, which is unacceptable for the user.

In view of this, in order to avoid the problem that the network service cannot be provided for the user in the process of selecting the 4G camping cell because of poor signal quality of the anchor cell after the UE is handed over from 5G to 4G, the embodiment of the present disclosure sets the first cell camping threshold, and the first cell camping threshold is higher than the cell camping threshold specified by the protocol. The operation can ensure that when the signal quality of the anchor cell is smaller than the first cell residence threshold value and the UE closes the 5G switch and enters the 4G network system, the original anchor cell is directly abandoned to reside, the UE is forced to carry out the LTE network scanning process, and the previous TAU request and RRC connection establishment request processes are removed. The LTE cell selection process under the 4G network is greatly accelerated, the LTE cell with better signal quality can be more quickly resided, and the purposes of no influence on the Internet and power saving of a user are realized. In other words, in this embodiment of the present disclosure, the 5G is characterized by using the first network system, and the 4G is characterized by using the second network system, so that the cell selection method provided in this embodiment of the present disclosure includes: the method comprises the steps of detecting the network type of UE, determining a first cell residence threshold value of the UE when the network type of the UE is detected to be switched from a first network type to a second network type, reselecting a resident cell based on the first cell residence threshold value and the signal quality of an anchor cell, and continuing detection when the network type of the UE is not detected to be switched from the first network type to the second network type.

Fig. 2 is a flow chart illustrating a method of cell selection in accordance with an example embodiment. As shown in fig. 2, the cell selection method includes the following steps.

In step S11, in response to detecting that the network type of the UE is switched from the first network type to the second network type, a first cell camping threshold of the UE is determined.

In the embodiment of the present disclosure, the first cell residence threshold is higher than the protocol-specified cell residence threshold, and the protocol-specified cell residence threshold is characterized by the second cell residence threshold for convenience of description.

In the embodiment of the present disclosure, the first cell camping threshold is set in the UE, and is irrelevant to the network behavior. In one embodiment, the first cell camping threshold may be preset according to an index level representing signal quality. The first cell residence threshold determined in the embodiment of the present disclosure satisfies a service requirement of the UE for communication.

In step S12, the camped cell is reselected based on the first cell camping threshold and the signal quality of the anchor cell.

In the embodiment of the present disclosure, the anchor cell is a cell where the UE resides in the first network system. And reselecting the resident cell according to the relation between the signal quality of the anchor cell and the resident threshold value of the first cell. The Signal Quality of the anchor cell may be characterized by a Reference Signal Receiving Power (RSRP), a Reference Signal Receiving Quality (RSRQ), and/or a Signal-to-Noise Ratio (SNR), and may also be characterized by other index values characterizing the Signal Quality of the anchor cell, which is not limited in this disclosure.

In the embodiment of the disclosure, when the signal quality of the anchor cell is lower than the camping threshold of the first cell, the anchor cell is abandoned to camp on, network scanning is performed in the second network system, and the camping cell is reselected from the cells in the second network system. And under the condition that the signal quality of the anchor cell is greater than or equal to the first cell residence threshold value, sending a tracking area updating request and a wireless resource control request to the anchor cell so as to reselect the resident cell.

According to the cell selection method provided by the embodiment of the disclosure, the resident cell after the network system switching is screened through the first cell resident threshold, so that the situation that the user Internet experience is seriously influenced because UE resides in the anchor point cell with poor signal quality after a TAU request and a RRC connection establishment request are successfully performed on the anchor point cell with poor signal quality is avoided. According to the method and the device, the anchor point cell with the signal quality lower than the first cell residence threshold value can be directly removed through the first cell residence threshold value, the network is scanned again, the residence cell with the optimal signal quality is obtained, and the user can be guaranteed to have no worry about surfing the internet.

In the disclosed embodiment, fig. 3 is a flowchart illustrating a cell selection method according to an exemplary embodiment. Referring to fig. 3, the process of reselecting a camped cell based on the first cell camping threshold and the signal quality of the anchor cell includes the following steps.

In step S121a, the relationship between the first cell residence threshold and the signal quality of the anchor cell is determined.

In step S122a, when the signal quality of the anchor cell is lower than the first cell camping threshold, camping on the anchor cell is stopped.

In step S123a, network scanning of the second network system is performed, and a camped cell is reselected from the cells of the second network system.

In the embodiment of the present disclosure, when the signal quality of the anchor cell is lower than the first cell camping threshold, the UE abandons sending the TAU request and the RRC connection establishment request to the anchor cell, performs 4G Network scanning, captures a Public Land Mobile Network (PLMN) from which a service can be obtained, then performs frequency scanning, and selects a suitable cell as the camping cell.

In the embodiment of the disclosure, for the anchor cell which directly abandons the signal quality lower than the first cell residence threshold value to scan the network again, the original TAU request and RRC connection establishment request processes are omitted, the time for the user to surf the network again is shortened, and the user is prevented from breaking off the flow.

In the disclosed embodiment, fig. 4 is a flowchart illustrating a cell selection method according to an exemplary embodiment. Referring to fig. 4, the process of reselecting a camped cell based on the first cell camping threshold and the signal quality of the anchor cell may further include the following steps.

In step S121b, the relationship between the first cell residence threshold and the signal quality of the anchor cell is determined.

In step S122b, in case the signal quality of the anchor cell is greater than or equal to the first cell camping threshold, a tracking area update request is transmitted and a radio resource control request is transmitted to reselect the camped cell.

In the embodiment of the present disclosure, when the signal quality of the anchor cell is greater than or equal to the first cell camping threshold, the UE sends a TAU request and an RRC connection establishment request to the anchor cell. And when the TAU request and the RRC connection establishment request are successfully sent to the anchor cell, the UE resides in the anchor cell, the anchor cell provides the second network system service at the moment, the example is continued, and the anchor cell provides the 4G network service at the moment. When sending the TAU request and the RRC connection establishment request to the anchor cell fails, the UE may try the TAU request and the RRC connection establishment request several times until reaching the limit of the number of RRC connection failures, enter an OOS state, then perform 4G Network scanning, capture a Public Land Mobile Network (PLMN) from which a service can be obtained, and perform frequency scanning to select a suitable cell as a camping cell.

In the embodiment of the present disclosure, the first cell camping threshold may be preset.

In one embodiment, a first cell camping threshold of the UE is preset based on an index level characterizing signal quality.

The first cell residence threshold value set by the method meets the service requirement of communication of the UE. In the field of communications, the signal quality of a cell can be measured by a single index or a combination of multiple indices. The purpose of setting the first cell residence threshold is to measure the signal quality of the anchor cell, and therefore, an index for measuring the signal quality of the anchor cell needs to be determined first, and then the first cell residence threshold is determined according to an index level corresponding to the index.

In the embodiment of the present disclosure, the anchor cell Signal Quality may be characterized by one of a Reference Signal Receiving Power (RSRP), a Reference Signal Receiving Quality (RSRQ), and a Signal Noise Ratio (SNR), for example, by RSRP, RSRQ, or SNR. It may also be characterized by a combination of multiple metrics, for example, by RSRP and RSRQ, RSRQ and SNR, RSRP and SNR, and RSRP, RSRQ, and SNR. When the signal quality of the anchor cell is measured by a single index, the first cell residence threshold is set according to the index level of the index. When the signal quality of the anchor cell is measured by the combination of a plurality of indexes, the first cell residence threshold corresponding to each index is set according to the index grade of each index in the index combination, and a judgment condition needs to be set. The judgment condition may be that all indexes representing the signal quality of the anchor point cell respectively satisfy the corresponding first cell residence threshold, or that the specified indexes representing the signal quality of the anchor point cell respectively satisfy the corresponding first cell residence threshold. For example, the signal quality of the anchor cell is measured by RSRP and SNR, a first cell camping threshold a is set according to RSRP, a first cell camping threshold B is set according to SNR, and the set determination condition is to reselect the camped cell according to RSRP, the first cell camping threshold a, and SNR and the first cell camping threshold B. In other words, the camped cell needs to be reselected according to the relation between RSRP and the first cell camping threshold a and the relation between SNR and the first cell camping threshold B.

In one implementation of the embodiments of the present disclosure, the signal quality of the anchor cell is characterized by RSRP, and the first cell camping threshold is determined by RSRP. RSRP is the average of the received signal power over all Resource Elements (REs) carrying reference signals within a certain symbol, and is a key parameter representing the strength of a wireless signal. Higher RSRP indicates better cell signal conditions. Table 1 shows the coverage strength levels and the available traffic levels for different RSRP values.

Table 1 coverage strength levels and available traffic levels for different RSRP values

According to table 1, a first cell camping threshold may be set in advance according to coverage strength levels corresponding to different RSRP values and available service levels, and in order to ensure the internet experience of the user, a selection may be made from RSRP values corresponding to a coverage strength level 3, a coverage strength level 2, and a coverage strength level 1.

In the embodiment of the present disclosure, detecting that the network type of the UE is switched from the first network type to the second network type includes the following steps.

And under the condition that the first network type switch on the UE is detected to be closed, determining that the network type of the UE is detected to be switched from the first network type to the second network type.

In the embodiment of the present disclosure, the triggering manner in which the first network type switch on the UE is turned off includes voice instruction triggering, hardware key triggering, or touch signal triggering.

In order to describe the cell selection method provided by the present disclosure more clearly, in one embodiment, the cell selection method of the present disclosure is exemplified by taking the first network standard as 5G and the second network standard as 4G.

Fig. 5 is a flow chart illustrating a method of cell selection in accordance with an example embodiment. As shown in fig. 5, the cell selection method in the NAS network includes the following steps.

In step S21, the user turns on the 5G switch.

In the embodiment of the present disclosure, the UE camps on the anchor point cell with the best signal quality among all anchor point cells, but the anchor point cell with the best signal quality is not necessarily better than the anchor point cell with the non-anchor point cell, and a 5G icon is displayed on the UE.

In step S22, it is detected that the 5G switch is turned off by the user.

In the embodiment of the present disclosure, after the user turns off the 5G switch, since the network capability supported by the UE is changed, the camping cell needs to be reselected.

In step S23, the relationship between the signal quality of the anchor cell and the first cell camping threshold is determined.

In step S24, when the signal quality of the anchor cell is greater than or equal to the first cell camping threshold, the TAU and the RRC request sent by the UE and whether the TAU and the RRC request sent by the UE are successful is determined.

In step S25, the TAU and RRC request sent by the UE is successful, and the UE continues to camp on the anchor cell.

In step S26, when the TAU and RRC request sent by the UE fails, the UE continues to send the TAU and RRC request and determines whether the current number of failures reaches the set limit of the number of failures of the RRC connection establishment request.

In step S27, if the current failure number does not reach the failure number limit, the UE continues to send the TAU and the RRC request failure, otherwise enters the OOS state, performs 4G network scanning, and camps on a new LTE cell.

In the embodiment of the present disclosure, due to poor signal quality of the anchor cell, the UE fails to send the TAU and RRC requests, and the process of the UE trying the TAU and RRC requests for multiple times wastes time, and the user is in a state of being unable to surf the internet for a long time.

In step S28, when the signal quality of the anchor cell is lower than the first cell camping threshold, the anchor cell is abandoned to camp on the 4G network for scanning, and the LTE cell camps on the new LTE cell.

The 4G network scanning process in the embodiments of the present disclosure includes PLMN selection, frequency scanning, cell selection, and cell camping. In other words, the PLMNs from which services are available are acquired, and a frequency scan is performed to select a suitable cell from the PLMNs as a camping cell.

In the case where the user turns off the 5G switch and the signal quality of the anchor cell does not satisfy the first cell residence threshold, the key to performing cell selection is to reselect the resident cell based on the first cell residence threshold and the signal quality of the anchor cell, i.e., step S24 and step S28. The method not only saves the time for the user to select the resident cell, but also ensures that the UE can quickly determine the resident cell after the network type is switched. Meanwhile, after the TAU and RRC request is failed to be made on the original anchor point cell, the process that the UE tries to establish the RRC on the original anchor point cell with poor signal quality for many times is power-consuming (the UE can continuously increase the signal transmitting power to try to establish the RRC connection with the network), and the process that the RRC tries to establish for many times is omitted in the embodiment of the disclosure, so that the purpose of saving power is achieved.

Based on the same conception, the embodiment of the disclosure also provides a cell selection device.

It is to be understood that, in order to implement the above functions, the cell selection apparatus provided in the embodiments of the present disclosure includes a hardware structure and/or a software module for performing each function. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

Fig. 6 is a block diagram illustrating a cell selection apparatus in accordance with an example embodiment. Referring to fig. 6, cell selection apparatus 100 includes determination section 101 and selection section 102.

The determining unit 101 is configured to determine a first cell residence threshold of the user equipment in response to detecting that the network standard of the user equipment is switched from the first network standard to the second network standard.

A selecting unit 102, configured to reselect a camped cell based on the first cell camping threshold and the signal quality of the anchor cell.

The first cell residence threshold is higher than the second cell residence threshold, the second cell residence threshold is a cell residence threshold specified by a protocol, and the anchor cell is a cell where the UE resides in the first network system.

In an embodiment of the present disclosure, the selecting unit 102 is configured to:

and if the signal quality of the anchor point cell is lower than the residence threshold of the first cell, stopping residence in the anchor point cell, performing network scanning of a second network standard, and reselecting the resident cell in the cells of the second network standard.

and if the signal quality of the anchor cell is greater than or equal to the first cell resident threshold, sending a tracking area updating request and sending a wireless resource control request to reselect the resident cell.

In the embodiment of the present disclosure, the first cell camping threshold is preset in the following manner:

In the embodiment of the present disclosure, the determining unit 101 is configured to:

and in response to detecting that the first network type switch on the user equipment is closed, determining that the network type of the user equipment is switched from the first network type to the second network type.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Fig. 7 is a block diagram illustrating an apparatus 200 for cell selection in accordance with an example embodiment. For example, the apparatus 200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 7, the apparatus 200 may include one or more of the following components: a processing component 202, a memory 204, a power component 206, a multimedia component 208, an audio component 210, an input/output (I/O) interface 212, a sensor component 214, and a communication component 216.

The processing component 202 generally controls overall operation of the device 200, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 202 may include one or more processors 220 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 202 can include one or more modules that facilitate interaction between the processing component 202 and other components. For example, the processing component 202 can include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.

The memory 204 is configured to store various types of data to support operations at the apparatus 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 204 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 206 provide power to the various components of device 200. The power components 206 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the apparatus 200.

The multimedia component 208 includes a screen that provides an output interface between the device 200 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 200 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 210 is configured to output and/or input audio signals. For example, audio component 210 includes a Microphone (MIC) configured to receive external audio signals when apparatus 200 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 204 or transmitted via the communication component 216. In some embodiments, audio component 210 also includes a speaker for outputting audio signals.

The I/O interface 212 provides an interface between the processing component 202 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 214 includes one or more sensors for providing various aspects of status assessment for the device 200. For example, the sensor assembly 214 may detect an open/closed state of the device 200, the relative positioning of components, such as a display and keypad of the device 200, the sensor assembly 214 may also detect a change in the position of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration/deceleration of the device 200, and a change in the temperature of the device 200. The sensor assembly 214 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 214 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 216 is configured to facilitate wired or wireless communication between the apparatus 200 and other devices. The device 200 may access a wireless network based on a communication standard, such as WiFi,4G or 5G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as memory 204, that are executable by processor 220 of device 200 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another, and do not indicate a particular order or degree of importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for cell selection, comprising:

determining a first cell residence threshold of user equipment in response to detecting that a network standard of the user equipment is switched from a first network standard to a second network standard, wherein the first cell residence threshold is higher than a second cell residence threshold, and the second cell residence threshold is a cell residence threshold specified by a protocol;

reselecting the resident cell based on the first cell resident threshold and the signal quality of the anchor cell, wherein the anchor cell is the cell where the user equipment resides in the first network system.

2. The method of claim 1, wherein reselecting the camped cell based on the first cell camping threshold and an anchor cell signal quality, comprises:

3. The method of claim 1, wherein reselecting the camped cell based on the first cell camping threshold and an anchor cell signal quality, comprises:

4. The cell selection method according to any one of claims 1 to 3, wherein the first cell camping threshold value is preset in the following manner:

and determining the first cell residence threshold value based on the index level representing the signal quality, wherein the first cell residence threshold value meets the service requirement of the user equipment for communication.

5. The cell selection method of claim 1, wherein detecting that the network standard of the user equipment is switched from a first network standard to a second network standard comprises:

and in response to detecting that a first network type switch on the user equipment is closed, detecting that the network type of the user equipment is switched from the first network type to a second network type.

6. A cell selection apparatus, comprising:

the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining a first cell residence threshold of user equipment in response to the detection that the network system of the user equipment is switched from a first network system to a second network system, the first cell residence threshold is higher than a second cell residence threshold, and the second cell residence threshold is a cell residence threshold specified by a protocol;

a selecting unit, configured to reselect a camped cell based on the first cell camping threshold and a signal quality of an anchor cell, where the anchor cell is a cell in which the user equipment camps in the first network system.

7. The cell selection apparatus of claim 6, wherein the selection unit is configured to:

8. The cell selection apparatus of claim 6, wherein the selection unit is configured to:

9. The cell selection apparatus according to any one of claims 6 to 8, wherein the first cell camping threshold value is preset in the following manner:

10. The cell selection apparatus of claim 6, wherein the determining unit is configured to:

11. A cell selection apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the cell selection method of any one of claims 1-5.

12. A storage medium having stored therein instructions that, when executed by a processor of a user equipment, enable the user equipment to perform the cell selection method of any one of claims 1-5.