CN112272392B

CN112272392B - Cell residence method, device, terminal equipment and storage medium

Info

Publication number: CN112272392B
Application number: CN202011158176.1A
Authority: CN
Inventors: 刘宇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2023-09-12
Anticipated expiration: 2040-10-26
Also published as: CN112272392A

Abstract

The application discloses a cell residence method, a device, a terminal device and a storage medium, wherein the method is applied to the terminal device, the terminal device has a double connection function, and the method comprises the following steps: filtering LTE cells to be resided based on the first cell list, and determining a target LTE cell; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells; and residing in the target LTE cell so as to enable the terminal equipment to access a 5G network and enable the terminal equipment to successfully enter a dual-connection mode. Therefore, when the terminal equipment performs operations such as cell selection, cell reselection or cell redirection, the blacklist cell can be directly filtered according to the blacklist of the LTE cell, and the problem of poor network service quality caused by the fact that the terminal cannot successfully access the 5G network due to the fact that the terminal resides in the blacklist cell is avoided.

Description

Cell residence method, device, terminal equipment and storage medium

Technical Field

The present application relates to communications technologies, and in particular, to a cell residence method, a device, a terminal device, and a storage medium.

Background

The fifth generation mobile communication (the fifth generation of cellular mobile communications, abbreviated as 5G) defines two types of networks, namely a stand alone networking (SA) network and a Non-stand alone Networking (NSA) network. These two types of 5G networks, together with long term evolution (Long Term Evolution, LTE) networks, coexist and associate with the deployment of networks for long periods of time.

In the non-independent networking, the terminal has an ENDC function, namely an terrestrial radio access (Evolved-UMTS Terrestrial Radio Access, EUTRA) function and an NR double connection (EUTRA-NR Dual Connectivity, ENDC) function, and the UMTS is fully called an Evolved universal mobile communication system (Universal Mobile Telecommunications System), and the ENDC function terminal can communicate with both an LTE base station and an NR base station in a connection state.

With the gradual progress of 5G NR construction, multiple operators access in an LTE cell sharing manner in an access side network. The following strategies are adopted by the shared cell constructed by the operator: (1) The terminal of the operator can reside in the cell and acquire normal service; (2) For terminals of other operators, the cell is only used as an anchor cell of the NSA network to add a secondary cell group (Secondary Cell Group, SCG) to the terminal, if the terminal cannot add the SCG and is always resident in the cell, the network can allocate little uplink and downlink resources to the terminal, so that the requirement of data service (such as web page browsing, game, video browsing and the like) of the terminal cannot be met, and the terminal user experience is affected. The current technical solution does not have an optimal solution for this situation.

Disclosure of Invention

In order to solve the above technical problems, an embodiment of the present application is expected to provide a cell residence method, a device, a terminal device, and a storage medium.

The technical scheme of the application is realized as follows:

in a first aspect, a cell residence method is provided, applied to a terminal device, where the terminal device has a dual connectivity function, and the method includes:

filtering LTE cells to be resided based on the first cell list, and determining a target LTE cell; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells;

camping on the target LTE cell to enable the terminal equipment to access a 5G network.

In a second aspect, there is provided a cell camping apparatus, the apparatus comprising:

the filtering unit is used for filtering the LTE cells to be resided based on the first cell list and determining target LTE cells; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells;

and the residence unit is used for residence to the target LTE cell so as to enable the terminal equipment to access a 5G network.

In a third aspect, there is provided a terminal device comprising: a processor and a memory configured to store a computer program capable of running on the processor,

wherein the processor is configured to execute the steps of the aforementioned method when the computer program is run.

In a fourth aspect, a computer storage medium is provided, on which a computer program is stored, wherein the computer program, when being executed by a processor, carries out the steps of the aforementioned method.

The embodiment of the application provides a cell residence method, a device, terminal equipment and a storage medium, wherein the method is applied to the terminal equipment, the terminal equipment has a double-connection function, and the method comprises the following steps: filtering LTE cells to be resided based on the first cell list, and determining a target LTE cell; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells; camping on the target LTE cell to enable the terminal equipment to access a 5G network. In this way, when the terminal device performs operations such as cell selection, cell reselection or cell redirection, the blacklist cell can be directly filtered according to the first cell list (also can be understood as an LTE cell blacklist), so that the problem of poor network service quality caused by that the terminal cannot successfully access the 5G network due to the fact that the terminal resides in the blacklist cell is avoided.

Drawings

FIG. 1 is a schematic view of the structure of a double-link frame;

fig. 2 is a schematic diagram of a first flow of a cell residence method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a second flow chart of a cell residence method according to an embodiment of the present application;

FIG. 4 is a third flow chart of a cell residence method according to an embodiment of the present application;

fig. 5 is a fourth flowchart of a cell residence method according to an embodiment of the present application;

fig. 6 is a fifth flowchart of a cell residence method according to an embodiment of the present application;

fig. 7 is a schematic diagram of a composition structure of a cell residence device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a composition structure of a terminal device in an embodiment of the present application.

Detailed Description

For a more complete understanding of the nature and the technical content of the embodiments of the present application, reference should be made to the following detailed description of embodiments of the application, taken in conjunction with the accompanying drawings, which are meant to be illustrative only and not limiting of the embodiments of the application.

The embodiment of the application provides a cell residence method, which is applied to terminal equipment (also simply referred to as a terminal) with a dual-connection function, fig. 1 is a schematic diagram of a composition structure of a dual-connection framework, and as shown in fig. 1, a terminal 101 can establish air interface connection with a main base station 102 (also referred to as a main node), so as to realize communication with the main base station 102; the terminal 101 may also establish an air interface connection with the secondary base station 103 (also referred to as a secondary node), so as to implement communication with the secondary base station 103; the terminal 101 may also establish an air interface connection with the primary base station 102 and the secondary base station 103 simultaneously, thereby enabling communication with the primary base station 102 and the secondary base station 103 simultaneously. In the dual connectivity mode, the terminal 101 establishes two connections with the primary base station 102 and the secondary base station 103 simultaneously, wherein the primary base station 102 is mainly responsible for transmitting signaling and the secondary base station 103 is responsible for transmitting data. The cells under the primary base station 102 form a primary cell group (Master Cell group, MCG), the cells under the secondary base station 103 form a secondary cell group (Secondary Cell Group, SCG), and the technical scheme of the embodiment of the application mainly aims at the terminal under the dual-connection mode.

In the embodiment of the application, the dual-connection mode is an EN-DC mode or a next generation EN-DC (next generation EN-DC, NGEN-DC) mode, in which case the main base station is an LTE base station, the auxiliary base station is an NR base station, and the terminal communicates with both the LTE base station and the NR base station.

In specific implementation, the deployment mode of the main base station and the auxiliary base station may be co-station deployment (for example, the NR base station and the LTE base station may be disposed on one entity device), or may be non-co-station deployment (for example, the NR base station and the LTE base station may be disposed on different entity devices), which is not limited in the present application. Here, the LTE base station may also be referred to as an evolved Node B (eNB), and the NR base station may also be referred to as a next generation base station (next generation Node B, gNB). It should be noted that, the present application may not be limited to the interrelation of the coverage areas of the primary base station and the secondary base station, for example, the primary base station and the secondary base station may overlap.

The present application is not limited to a specific type of terminal 101, and may be any user equipment supporting the dual connectivity mode, for example, smart phones, personal computers, notebook computers, tablet computers, portable wearable devices, etc.

The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail by examples and with reference to the accompanying drawings. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 2 is a first flow chart of a cell residence method according to an embodiment of the present application, as shown in fig. 2, the method may specifically include:

step 201: filtering LTE cells to be resided based on the first cell list, and determining a target LTE cell; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells;

here, the first cell list may be understood as an LTE cell blacklist, where the LTE cell blacklist includes at least one LTE cell (for short, blacklist cell), and when the terminal resides in the blacklist cell, the terminal cannot be added normally and resides in the 5G cell, and the LTE cell blacklist may be established and maintained by the terminal itself or be established and maintained by the network side.

In some embodiments, this step is preceded by the further step of: acquiring a preset first cell list; wherein, when the terminal device resides in the LTE cell in the first cell list, the terminal device cannot normally access the 5G network. Specifically, acquiring a first cell list includes: acquiring a first cell list locally stored by terminal equipment; or sending an acquisition request to a network side so that the network side responds to the acquisition request to acquire and issue the first cell list corresponding to the terminal equipment; and receiving the first cell list issued by the network side. Here, the network side determines an LTE cell blacklist corresponding to the terminal according to the location information of the terminal and the information of the operator to which the terminal belongs, and issues the LTE cell blacklist to the terminal.

It should be noted that, the operator to which the terminal device belongs refers to an operator to which a SIM card currently used by the terminal device belongs, and when the terminal device includes two or more SIM cards and operators to which different SIM cards belong are different, different SIM cards may correspond to different LTE blacklist cells, and when the terminal device currently uses a target SIM card to reside in an LTE cell, the LTE blacklist cell corresponding to the target SIM card is obtained.

In some embodiments, the method further comprises: and if the terminal equipment cannot normally access the 5G network after residing in the first LTE cell, adding the first LTE cell into the first cell list.

When the terminal equipment maintains the LTE cell blacklist, the terminal equipment can maintain the blacklist according to the historical LTE cell in which the terminal equipment resides. Specifically, the filtering method for maintaining the blacklist may include: initializing an LTE cell blacklist; when the terminal equipment resides in a first LTE cell, detecting whether the terminal equipment can normally access a 5G network; and if the terminal equipment cannot normally access the 5G network, adding the first LTE cell into the first cell list.

That is, when the LTE cell in which the terminal resides cannot enable the terminal to normally add and reside in the 5G cell, that is, cannot enable the terminal to enter the dual connectivity mode, if the terminal cannot access the 5G network and resides in the cell all the time, the network will allocate little uplink and downlink resources to the terminal, and cannot meet the data service (such as browsing web pages, games, video, etc.) requirements of the terminal. Here, for

It should be noted that, the "first LTE cell" is only for illustrating a procedure of adding one LTE cell to the blacklist, and is not intended to limit a certain LTE cell in the blacklist, and all LTE cells in the blacklist may be "first LTE cells".

In some embodiments, the first LTE cell is an LTE shared cell established by an operator to which the terminal device belongs.

The non-terminal device-belonging operator refers to an operator other than the operator to which all SIM cards used by the terminal device belong.

With the gradual progress of 5G NR construction, multiple operators access the network on the access side by using LTE to share a cell. The shared cells built by some operators employ the following strategies:

(1) The terminal of the operator can reside in the cell and acquire normal service;

(2) For terminals of other operators, the cell is used for adding SCG (i.e. accessing 5G network) only as anchor cell of NSA network; if the terminal cannot add SCG and is always resident in the cell, the network allocates little uplink and downlink resources to the terminal, and the data service (such as browsing web pages, games, video, etc.) requirement of the terminal cannot be met. Here, the LTE cell is connected to the terminal as a primary cell, and the primary cell adds a 5G cell as a secondary cell to the terminal.

It can be understood that when the terminal resides in an LTE shared cell other than the carrier, the problem that the terminal cannot add a 5G cell easily occurs, so when the terminal resides in such an LTE cell, vigilance is required, and if the problem exists that the terminal cannot add a 5G cell, the LTE cell is directly added to the blacklist, so that the terminal cannot reside in the LTE cell in a future period of time, thereby ensuring the network connection quality of the terminal.

In some embodiments, the method specifically comprises: when the terminal equipment resides in an LTE cell, acquiring the operator information of the LTE cell; if the operator information characterizes that the LTE cell is a shared cell built by a non-self operator, determining that the LTE cell is a first LTE cell; and if the operator information characterizes that the LTE cell is a cell built by the operator, directly taking the LTE cell as a target LTE cell.

Further, when the terminal is detected to reside in the first LTE cell, whether the terminal equipment can normally access the 5G network is detected.

Specifically, the method for detecting whether the terminal device can normally access to the 5G network after residing in the first LTE cell includes:

After the terminal equipment enters a connection state, the SCG configuration information of the secondary cell group issued by the first LTE cell is not received in a first time period, and the terminal equipment is determined that the terminal equipment cannot normally access a 5G network;

or after the terminal equipment enters a connection state, receiving SCG configuration information issued by the first LTE cell in a second time period, wherein the SCG configuration information fails to be accessed into a 5G network, and determining that the terminal equipment cannot be normally accessed into the 5G network;

or after the terminal equipment is accessed to the 5G network, detecting that the terminal equipment is disconnected from the 5G network abnormally, and determining that the terminal equipment cannot be accessed to the 5G network normally.

In some embodiments, after the terminal connects to the LTE cell, the LTE network adds SCG to the terminal by issuing an RRC connection reconfiguration message (Radio Resource Control Connection Reconfiguration) (i.e., SCG configuration information), which configures all details required for accessing the network, such as a system frame number, a system bandwidth, a public land mobile network (Public Land Mobile Network, PLMN), cell selection and reselection thresholds, etc., to enable the terminal to access the 5G network according to parameters configured in the RRC connection reconfiguration message. Therefore, when the terminal does not receive the RRC connection reconfiguration message or receives the RRC connection reconfiguration message, but the terminal device cannot normally access the 5G network due to a configuration parameter error, or failure in accessing the 5G network caused by a failure in random access or a failure in finding a corresponding 5G network according to the configuration parameter.

Or after receiving the RRC connection reconfiguration message, the terminal successfully accesses the 5G network, but detects that the connection between the terminal and the 5G network is unstable, namely that the terminal and the 5G network are abnormally disconnected, and the disconnection is not caused by the reason of the terminal or the 5G network, but caused by the resident LTE cell. Therefore, such LTE cells may be saved to a blacklist, avoiding the next camping again.

Specifically, the detecting that the terminal device is abnormally disconnected from the 5G network includes: and in a third time period, when the terminal equipment is detected to be disconnected from the 5G network and the signal intensity of the 5G network is larger than an intensity threshold value, determining that the terminal equipment is abnormally disconnected from the 5G network.

It should be noted that, when the terminal successfully accesses the 5G network, but detects that the terminal is disconnected from the 5G network within a period of time (i.e., a third period of time), and the signal strength of the 5G network is greater than the strength threshold value when the terminal is disconnected, which indicates that the terminal is located at a position where the signal coverage of the 5G network is stronger, but the terminal cannot be connected to the 5G network, we find that for the terminal with the dual connectivity function, the connection abnormality is caused by the connected LTE shared cell of the non-home operator. Therefore, such LTE cells are kept in the blacklist, avoiding the next re-camping.

In other embodiments, after adding the first LTE cell to the first cell list, the method further comprises: and deleting the first LTE cell from the first cell list after a preset timing time is up.

Specifically, a timer may be added to the cells in the blacklist, and the time is counted from when the first LTE cell is added to the blacklist, where the timer counts until the cells are deleted from the blacklist, and the deleted cells may be treated as normal cells, and then added to the blacklist when the problem occurs next time. It should be noted that, since the operator may periodically maintain the established cell, or the network service quality of the cell may be different at different times due to the influence of the real-time network condition. Therefore, by setting a timer, the cells in the blacklist are released after a period of time, and the situation that the blacklist cells are recovered to be normal but cannot participate in the terminal service is avoided.

In other embodiments, the first LTE cell may also be an LTE cell established by an operator to which the terminal device belongs.

It should be noted that, in practical application, there may be a problem that an LTE shared cell or an LTE dedicated cell established by an operator to which the LTE shared cell belongs cannot add a 5G cell to a terminal device, and for a terminal with strict dual connection quality requirements, access to such an LTE cell may be avoided, so as to ensure reliability of dual connection mode.

Specifically, when the LTE cell to be camped is a cell in the blacklist, the cell is ignored, and when the LTE cell to be camped is not a cell in the first cell list, the cell is taken as the target LTE cell.

It should be noted that, the LTE cell to be camped on includes an LTE cell located by the terminal performing cell selection, cell reselection, and cell redirection, if the located LTE cell is a cell in the blacklist, the cell is ignored, and the next cell is continuously located until the location is to a cell not in the blacklist, and the cell is taken as the target LTE cell.

Step 202: camping on the target LTE cell to enable the terminal equipment to access a 5G network.

After the terminal resides in the target LTE cell, the target LTE cell adds a 5G cell to the terminal, so that the terminal accesses the 5G network as well as the LTE cell, and enters the dual-connectivity mode.

In a non-independent networking, the UE may operate in a dual connectivity mode. In dual connectivity mode, the UE communicates with both a primary base station (e.g., LTE base station) and a secondary base station (e.g., NSA-enabled 5G base station) in a non-standalone network. In the dual-connection architecture shown in fig. 1, a main base station 102 and an auxiliary base station 103 are associated and distributed, where the main base station is a base station corresponding to an LTE cell, the auxiliary base station is a base station corresponding to a 5G cell, and the 5G cell may be a neighboring cell of the LTE cell. The terminal can establish air interface connection with the main base station and the auxiliary 5G base station at the same time, thereby realizing communication with the main base station and the auxiliary base station at the same time and improving the utilization rate of wireless resources.

By adopting the technical scheme, when the terminal equipment performs operations such as cell selection, cell reselection or cell redirection, the blacklist cell can be directly filtered according to the LTE cell blacklist, so that the problem of poor network service quality caused by incapability of successfully accessing a 5G network due to the fact that the terminal resides in the blacklist cell is avoided.

The implementation procedures of cell selection, cell reselection, cell redirection and cell handover according to the present application are further illustrated on the basis of the above-described embodiments of the present application.

Fig. 3 is a second flow chart of a cell residence method according to an embodiment of the present application, as shown in fig. 3, in the cell selection process, the method specifically includes:

step 301: acquiring a preset first cell list; wherein, the terminal equipment cannot normally access to a 5G network when residing in an LTE cell in the first cell list;

here, the first cell list may be understood as an LTE cell blacklist, where the LTE cell blacklist includes at least one LTE cell (for short, blacklist cell), and when the terminal resides in the blacklist cell, the terminal cannot be added normally and resides in the 5G cell, and the LTE cell blacklist may be established and maintained by the terminal itself or be established and maintained by the network side. That is to say, this step may specifically include: acquiring an LTE cell blacklist locally stored by terminal equipment; or sending a request to a network side, determining an LTE cell blacklist corresponding to the terminal according to the position information of the terminal and the information of the affiliated operator by the network side, and issuing the LTE cell blacklist to the terminal. In practical application, the network side may determine the first LTE cell according to the terminal reporting information and add the first LTE cell to the blacklist.

When the terminal equipment maintains the LTE cell blacklist, the terminal equipment can maintain the blacklist according to the historical LTE cell in which the terminal equipment resides. In particular, a method of maintaining a blacklist may include: initializing an LTE cell blacklist; when the terminal equipment resides in a first LTE cell, detecting whether the terminal equipment can normally access a 5G network; and if the terminal equipment cannot normally access the 5G network, adding the first LTE cell into the first cell list.

Step 302: when the terminal equipment performs cell search, judging whether a searched second LTE cell is in the first cell list; if so, go to step 303; if not, go to step 304;

specifically, the cell search is performed by the terminal device, including: searching is conducted in a preset frequency band range based on the searching priority.

In some embodiments, the first LTE cell in the blacklist is an LTE shared cell established by an operator to which the terminal device belongs.

Correspondingly, the method specifically comprises the following steps: the terminal equipment searches in a preset frequency range based on the search priority, and judges whether the searched second LTE cell is in the first cell list if the searched second LTE cell is an LTE shared cell established by other operators; if the searched second LTE cell is the LTE cell established by the operator, the cell is directly used as the resident target LTE cell.

An LTE cell identifier is used in the blacklist to uniquely identify an LTE cell, and illustratively, the LTE cell identifier may include a frequency point+a physical cell identifier (Physical Cell Identifier, PCI), and when the searched second LTE cell identifier is consistent with the first LTE cell identifier in the blacklist, it is determined that the searched second LTE cell is in the blacklist, and when the searched second LTE cell is inconsistent with the first LTE cell identifier in the blacklist, it is determined that the searched second LTE cell is not in the blacklist.

In some embodiments, the preset frequency band range includes at least one of: the frequency point stored by the terminal belongs to the full frequency band of the operator, and the frequency point is not the full frequency band of the operator to which the terminal belongs.

It should be noted that, the search priority includes that the frequency point priority stored by the terminal is higher than the full-band priority, and the full-band priority of the operator is higher than the full-band priority of the operator to which the non-terminal belongs. That is, the terminal performs the cell search by "searching based on the saved information frequency point" and then "full-band search", if the cell found on a certain frequency point is a cell in the blacklist, the cell is not resided, and continues to search for the next cell until the cell not in the blacklist is searched, and the cell is taken as the target LTE cell.

Step 303: when the searched second LTE cell is in the first cell list, ignoring the second LTE cell, continuing to search for the next cell, and returning to the step 302;

in some embodiments, the method further comprises: and when the LTE cells which are not in the first cell list and meet the cell residence conditions are not searched in the preset frequency range, searching the cells by adopting other access modes, and accessing the cells.

Here, other access modes may be wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) or global system for mobile communication (Global System for Mobile Communications, GSM).

In some embodiments, the method further comprises: and when the LTE cells which are not in the first cell list and meet the cell residence conditions are not searched in the preset frequency range, searching the LTE cells which are in the first cell list and meet the cell residence conditions again and residence.

That is, if the terminal tries all access methods and still cannot find a suitable cell, in order to avoid entering into a limited service or no service state, the search is performed again "based on the saved information frequency point search" and "full band search", but at this time, the terminal can try to camp on the cell in the blacklist, which is advantageous in that the terminal can still camp on the 4G network, and the LTE cell where the network resources are sufficient can still provide normal 4G network service for the terminal.

Step 304: when the searched second LTE cell is not in the first cell list, judging whether the second LTE cell meets cell residence conditions or not; if so, go to step 305; if not, go to step 303;

step 305; taking the second LTE cell as the target LTE cell;

step 306: camping on the target LTE cell to enable the terminal equipment to normally access a 5G network.

By adopting the technical scheme, when the terminal equipment performs cell selection, the searched blacklist cell can be directly filtered according to the blacklist of the LTE cell, so that the problem of poor network service quality caused by incapability of successfully accessing the 5G network by the terminal due to the fact that the terminal resides in the blacklist cell is avoided.

Fig. 4 is a third flow chart of a cell residence method according to an embodiment of the present application, as shown in fig. 4, in the cell reselection process, the method specifically includes:

step 401: acquiring a preset first cell list; wherein, the terminal equipment cannot normally access to a 5G network when residing in an LTE cell in the first cell list;

Here, the first cell list may be understood as an LTE cell blacklist, where the LTE cell blacklist includes at least one LTE cell (for short, blacklist cell), and when the terminal resides in the blacklist cell, the terminal cannot be added normally and resides in the 5G cell, and the LTE cell blacklist may be established and maintained by the terminal itself or be established and maintained by the network side. That is to say, this step may specifically include: acquiring an LTE cell blacklist locally stored by terminal equipment; or sending a request to a network side, determining an LTE cell blacklist corresponding to the terminal according to the position information of the terminal and the information of the affiliated operator by the network side, and issuing the LTE cell blacklist to the terminal.

Step 402: when the terminal equipment performs cell reselection, judging whether a third LTE cell meeting a cell reselection judgment condition is in the first cell list; if yes, go to step 403; if not, go to step 404;

the LTE cell reselection refers to a process in which a terminal provides a service signal by monitoring signal quality of a neighbor cell and a current cell in an idle mode. When the signal quality and level of the neighbor cell meet the S criterion and meet a certain reselection decision criterion, the terminal will access the cell to reside.

After the UE successfully camps, the measurement of the cell is continuously performed. The RRC layer calculates Srxlev (S criterion) according to the measurement result of the reference signal received power, and compares the Srxlev with Sintrasearch (common frequency measurement threshold) and Snonentersearch (inter-frequency measurement threshold) as a judging condition for whether to reselect the neighbor cell or not.

Specifically, the cell reselection decision condition may be: and the UE determines to reselect the neighbor cell by detecting the signal strengths of the neighbor cell and the current serving cell in the idle state, and determining that the signal strength of the current serving cell is lower than a certain threshold value when the signal strength of the neighbor cell is higher than the certain threshold value.

Step 403: determining that reselection fails, continuing cell reselection, and returning to step 402;

Here, when the reselection fails, the reselection decision is not performed on the third LTE cell in the fourth period of time.

Step 404: taking the third LTE cell as the target LTE cell;

i.e. the third LTE cell is not in the blacklist, the reselection may be completed normally.

Step 405: and the terminal equipment reselects to the target LTE cell.

By adopting the technical scheme, when the terminal equipment reselects the cell, the blacklist cell can be directly filtered according to the blacklist of the LTE cell, so that the problem of poor network service quality caused by incapability of successfully accessing the 5G network by the terminal due to residence in the blacklist cell is avoided.

Fig. 5 is a fourth flowchart of a cell residence method according to an embodiment of the present application, as shown in fig. 5, where the method specifically includes:

step 501: acquiring a preset first cell list; wherein, the terminal equipment cannot normally access to a 5G network when residing in an LTE cell in the first cell list;

Step 502: when the terminal equipment performs cell redirection, judging whether a redirected fourth LTE cell is in the first cell list; if yes, go to step 503; if not, go to step 504;

redirection in LTE means that the system indicates that the terminal is to attempt to camp on a designated frequency point after leaving the connected state through redirection operator information (redirected Carrier Info) in an RRC connection release (RRC Connection Release) message. The terminal searches the cell on the appointed frequency point.

The cell redirection is divided into measurement-based redirection and non-measurement-based redirection, and when the measurement-based redirection is selected, after receiving a measurement report of the UE, the base station selects a cell initiation redirection with better priority and signal; when non-measurement-based redirection is selected, the base station can initiate redirection by selecting a neighbor cell with highest priority in neighbor cell frequency points.

Step 503: ignoring the fourth LTE cell, redirecting the next cell, and returning to step 502;

step 504: taking the fourth LTE cell as the target LTE cell;

step 505: the terminal device redirects to the target LTE cell.

By adopting the technical scheme, when the terminal equipment performs cell redirection, the blacklist cell can be directly filtered according to the blacklist of the LTE cell, so that the problem of poor network service quality caused by incapability of successfully accessing the 5G network by the terminal due to residence in the blacklist cell is avoided.

Fig. 6 is a fifth flowchart of a cell residence method according to an embodiment of the present application, as shown in fig. 6, in which the method specifically includes: .

Step 601: acquiring a preset first cell list; wherein, the terminal equipment cannot normally access to a 5G network when residing in an LTE cell in the first cell list;

Step 602: when the terminal equipment performs cell switching, switching to a fifth LTE cell;

specifically, the cell handover decision condition may be: and the UE determines to switch to the neighbor cell by detecting the signal quality of the neighbor cell and the signal quality of the current serving cell in the connection state, and determining that the signal strength of the current serving cell is lower than a certain threshold value when the signal strength of the neighbor cell is higher than the certain threshold value.

Step 603: judging whether a fifth LTE cell is in the first cell list; if so, go to step 604; if not, go to step 605;

that is, after the terminal performs the cell switching operation, when the network is detected to switch the cell where the terminal resides to the cell in the blacklist, the terminal is actively disconnected to fail the switching operation, so that the terminal is forced to reselect other cell residents, thereby avoiding that the terminal resides in the blacklist cell for a long time and cannot enter the dual-connection mode.

Step 604: disconnecting the connection with the fifth LTE cell when the fifth LTE cell is in the first cell list;

step 605: a connection is maintained with the fifth LTE cell.

After the terminal resides in the fifth LTE cell, the fifth LTE cell adds a 5G cell to the terminal, so that the terminal accesses the 5G network as well as the LTE cell, and enters the dual-connectivity mode.

By adopting the technical scheme, when the terminal equipment performs cell redirection, the connection with the blacklist cell can be disconnected in time when the terminal equipment is switched to the blacklist cell, so that the problem of poor network service quality caused by incapability of successfully accessing a 5G network due to residence in the blacklist cell is avoided.

In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a cell residence device based on the same inventive concept, as shown in fig. 7, where the device includes:

a filtering unit 701, configured to filter an LTE cell to be camped on based on the first cell list, and determine a target LTE cell; the first cell list is used for storing abnormal LTE cells, and the terminal equipment cannot normally access a 5G network when residing in the abnormal LTE cells;

a camping unit 702, configured to camp on the target LTE cell, so that the terminal device accesses a 5G network.

In some embodiments, the apparatus further includes a detection unit, configured to add the first LTE cell to the first cell list if the terminal device cannot normally access the 5G network after residing in the first LTE cell.

In some embodiments, the detecting unit is specifically configured to determine that the terminal device cannot normally access the 5G network after the terminal device enters a connection state and after receiving no secondary cell group SCG configuration information sent by the first LTE cell in a first period of time;

In some embodiments, the detecting unit is specifically configured to determine that the terminal device is abnormally disconnected from the 5G network when the terminal device is detected to be disconnected from the 5G network in a third time period and the signal strength of the 5G network is greater than a strength threshold.

In some embodiments, the detecting unit is further configured to delete the first LTE cell from the first cell list after a preset timer expires after the first LTE cell is added to the first cell list.

In some embodiments, the apparatus further comprises: an obtaining unit, configured to obtain the first cell list locally stored by the terminal device; or sending an acquisition request to a network side, so that the network side responds to the acquisition request to acquire and issue the first cell list corresponding to the terminal equipment; and receiving the first cell list issued by the network side.

In some embodiments, when the filtering unit 701 is specifically configured to perform cell search by the terminal device, when the searched second LTE cell is in the first cell list, the second LTE cell is ignored, and the search for the next cell is continued; when the searched second LTE cell is not in the first cell list, judging whether the second LTE cell meets cell residence conditions or not; if yes, the second LTE cell is used as the target LTE cell; if not, continuing to search for the next cell.

In some embodiments, the filtering unit 701 is specifically configured to perform a search within a preset frequency band based on a search priority; and when the LTE cells which are not in the first cell list and meet the cell residence conditions are not searched in the preset frequency range, searching the LTE cells which are in the first cell list and meet the cell residence conditions again and residence.

In some embodiments, when the filtering unit 701 is specifically configured to perform cell reselection by the terminal device, when a third LTE cell that meets a cell reselection decision condition is in the first cell list, it is determined that reselection fails, and reselection decision is not performed on the third LTE cell in a fourth period of time; otherwise, the third LTE cell is used as the target LTE cell;

the filtering unit 701 is specifically configured to, when the terminal device performs cell redirection, ignore a fourth LTE cell in the first cell list, and continue to determine a next redirection cell; otherwise, the fourth LTE cell is used as the target LTE cell.

In some embodiments, the residence unit 702 is further configured to switch to a fifth LTE cell when the terminal device performs cell switching; and disconnecting the connection with the fifth LTE cell when the fifth LTE cell is in the first cell list.

Based on the hardware implementation of each unit in the above-mentioned user equipment, the embodiment of the present application further provides another user equipment, as shown in fig. 8, where the user equipment includes: a processor 801 and a memory 802 configured to store a computer program capable of running on the processor;

Wherein the processor 801 is configured to execute the method steps in the aforementioned embodiments when running a computer program.

Of course, in actual practice, the various components in the user device are coupled together via a bus system 803, as shown in FIG. 8. It is appreciated that the bus system 803 provides for a connected communication between these components. The bus system 803 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled as bus system 803 in fig. 8.

In practical applications, the processor may be at least one of an application specific integrated circuit (ASIC, application Specific Integrated Circuit), a digital signal processing device (DSPD, digital Signal Processing Device), a programmable logic device (PLD, programmable Logic Device), a Field-programmable gate array (Field-Programmable Gate Array, FPGA), a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronics for implementing the above-described processor functions may be other for different devices, and embodiments of the present application are not particularly limited.

The Memory may be a volatile Memory (RAM) such as Random-Access Memory; or a nonvolatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (HDD) or a Solid State Drive (SSD); or a combination of the above types of memories and provide instructions and data to the processor.

By adopting the terminal equipment, when the terminal equipment performs operations such as cell selection, cell reselection or cell redirection, the blacklist cell can be directly filtered according to the LTE cell blacklist, so that the problem of poor network service quality caused by incapability of successfully accessing a 5G network due to the fact that the terminal resides in the blacklist cell is avoided.

In an exemplary embodiment, the application also provides a computer-readable storage medium, for example a memory comprising a computer program executable by a processor of a terminal device for performing the steps of the aforementioned method.

The technical schemes described in the embodiments of the present application may be arbitrarily combined without any collision.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. The above-described embodiments are merely illustrative, and for example, the division of units is merely a logical function division, and other divisions may be implemented in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.

Claims

1. A cell residence method applied to a terminal device, wherein the terminal device has a dual connectivity function, the method comprising:

camping on the target LTE cell to enable the terminal equipment to access a 5G network;

the method further comprises the steps of:

if the terminal equipment cannot normally access to a 5G network after residing in a first LTE cell, adding the first LTE cell into the first cell list; the first LTE cell is an LTE shared cell which is not established by an operator to which the terminal equipment belongs, and the operator to which the terminal equipment belongs is the operator of the SIM card currently used by the terminal equipment.

2. The method according to claim 1, wherein the method for detecting whether the terminal device can normally access the 5G network after camping on the first LTE cell comprises:

3. The method of claim 2, wherein the detecting that the terminal device is abnormally disconnected from a 5G network comprises:

and in a third time period, when the terminal equipment is detected to be disconnected from the 5G network and the signal intensity of the 5G network is larger than an intensity threshold value, determining that the terminal equipment is abnormally disconnected from the 5G network.

4. The method of claim 1, wherein after adding the first LTE cell to the first cell list, the method further comprises:

and deleting the first LTE cell from the first cell list after a preset timing time is up.

5. The method according to claim 1, wherein the method further comprises:

acquiring the first cell list locally stored by the terminal equipment;

or sending an acquisition request to a network side, so that the network side responds to the acquisition request to acquire and issue the first cell list corresponding to the terminal equipment; and receiving the first cell list issued by the network side.

6. The method of claim 1, wherein the filtering the LTE cells to be camped on based on the first cell list to determine the target LTE cell comprises:

when the terminal equipment performs cell search, when a searched second LTE cell is in the first cell list, ignoring the second LTE cell, and continuing to search for a next cell;

when the searched second LTE cell is not in the first cell list, judging whether the second LTE cell meets cell residence conditions or not;

if yes, the second LTE cell is used as the target LTE cell;

if not, continuing to search for the next cell.

7. The method of claim 6, wherein the terminal device performs a cell search, comprising: searching in a preset frequency range based on the search priority;

the method further comprises the steps of:

and when the LTE cells which are not in the first cell list and meet the cell residence conditions are not searched in the preset frequency range, searching the LTE cells which are in the first cell list and meet the cell residence conditions again and residence.

8. The method of claim 1, wherein the filtering the LTE cells to be camped on based on the first cell list to determine the target LTE cell comprises:

When the terminal equipment performs cell reselection, determining that reselection fails when a third LTE cell meeting a cell reselection decision condition is in the first cell list, and performing reselection decision on the third LTE cell in a fourth time period; otherwise, the third LTE cell is used as the target LTE cell;

or when the terminal equipment performs cell redirection, when a redirected fourth LTE cell is in the first cell list, ignoring the fourth LTE cell, and continuing to judge the next redirection cell; otherwise, the fourth LTE cell is used as the target LTE cell.

9. The method according to claim 1, wherein the method further comprises:

when the terminal equipment performs cell switching, switching to a fifth LTE cell;

and disconnecting the connection with the fifth LTE cell when the fifth LTE cell is in the first cell list.

10. A cell-camping apparatus, the apparatus comprising:

the filtering unit is used for filtering the LTE cells to be resided based on the first cell list and determining target LTE cells; the first cell list is used for storing abnormal LTE cells, and when the terminal equipment resides in the abnormal LTE cells, the terminal equipment cannot normally access the 5G network;

A camping unit, configured to camp on the target LTE cell, so that the terminal device accesses a 5G network;

the detection unit is used for adding the first LTE cell into the first cell list if the terminal equipment cannot normally access the 5G network after residing in the first LTE cell; the first LTE cell is an LTE shared cell which is not established by an operator to which the terminal equipment belongs, and the operator to which the terminal equipment belongs is the operator of the SIM card currently used by the terminal equipment.

11. A terminal device, characterized in that the terminal device comprises: a processor and a memory configured to store a computer program capable of running on the processor,

wherein the processor is configured to perform the steps of the method of any of claims 1 to 9 when the computer program is run.

12. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1 to 9.