CN113891416A

CN113891416A - Cell access method, device, equipment, storage medium and computer program

Info

Publication number: CN113891416A
Application number: CN202111223234.9A
Authority: CN
Inventors: 崔乙
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-01-04
Anticipated expiration: 2041-10-20
Also published as: CN113891416B

Abstract

The embodiment of the application discloses a cell access method, a cell access device, cell access equipment, a cell access storage medium and a cell access computer program, and belongs to the technical field of communication. The method comprises the following steps: under the condition that the access of a first NR cell fails in an independent networking mode, adding the first NR cell into a blacklist of a terminal, and switching from the independent networking mode to a non-independent networking mode; and in the process of carrying out cell access in the non-independent networking mode, redirecting to a second NR cell except the cell in the blacklist for requesting access in the independent networking mode based on the received redirection instruction of the access network. The method can avoid the terminal from repeatedly switching between the independent networking mode and the non-independent networking mode when accessing the 5G network.

Description

Cell access method, device, equipment, storage medium and computer program

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a cell access method, an apparatus, a device, a storage medium, and a computer program.

Background

Hot spots, such as airports, shopping malls, office buildings, etc., are covered by multiple cells.

In an area covered by multiple cells, a terminal (UE) can measure multiple cells simultaneously. The terminal preferentially accesses a New Radio (NR) cell in a stand alone group (SA) mode, and if the terminal cannot access the NR cell of the SA, the terminal attempts to access the NR cell in a Non stand alone group (NSA) mode.

However, in this access procedure, the terminal is prone to repeatedly switch between SA and NSA to attempt to access the NR network, which makes the terminal unable to access the network, resulting in data transmission interruption and traffic congestion.

Disclosure of Invention

The embodiment of the application provides a cell access method, a cell access device, cell access equipment, a storage medium and a computer program. The technical scheme is as follows:

according to an aspect of the present application, there is provided a cell access method, the method including:

under the condition that access to a first NR cell fails in an independent networking mode, adding the first NR cell into a blacklist of a terminal; and

switching from the standalone networking mode to a non-standalone networking mode;

and in the process of cell access in the non-independent networking mode, redirecting to a second NR cell which is requested to be accessed in the blacklist under the independent networking mode based on the received redirection instruction of the access network.

According to another aspect of the present application, there is provided a cell access apparatus, the apparatus comprising:

the adding module is used for adding the first NR cell into a blacklist of a terminal under the condition that the access of the first NR cell fails in an independent networking mode; and

a switching module, configured to switch from the independent networking mode to a non-independent networking mode when access to the first NR cell in the independent networking mode fails;

an access module, configured to, during a cell access process in the non-independent networking mode, redirect to a second NR cell, which is requested to be accessed in addition to the cells in the blacklist, in the independent networking mode based on a received redirection instruction of the access network.

According to another aspect of the present application, there is provided a terminal including:

a processor;

a transceiver coupled to the processor;

wherein the processor is configured to load and execute executable instructions to implement the cell access method as provided by the various aspects of the present application.

According to another aspect of the present application, there is provided a computer readable storage medium having stored therein program instructions, which when executed by a processor, implement the cell access method as provided by the various aspects of the present application.

According to another aspect of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the terminal reads the computer instructions from the computer-readable storage medium, and executes the computer instructions, so that the terminal executes the method provided in the various optional implementation manners of the cell access method.

The beneficial effects brought by the technical scheme provided by the embodiment of the application can include:

according to the cell access method, after a terminal fails to access a first NR cell in an independent networking mode, the first NR cell is added into a blacklist of the terminal, the independent networking mode is switched to a non-independent networking mode, cell access is carried out in the non-independent networking mode, when a redirection instruction of an access network is received in the non-independent networking mode, the cell access is carried out in the independent networking mode again, at the moment, the terminal requests access to a second NR cell except the cell in the blacklist, namely, when redirection access is carried out, the terminal is prevented from selecting the first NR cell again to access through the blacklist, the terminal is prevented from being continuously switched between the independent networking mode and the non-independent networking mode, the terminal can be enabled to access the network more rapidly, smooth data transmission is guaranteed, and the phenomenon of service blocking is avoided.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a networking architecture provided by another exemplary embodiment of the present application;

fig. 2 illustrates a schematic diagram of cell signal coverage provided by an exemplary embodiment of the present application;

FIG. 3 illustrates a schematic diagram of a communication system provided by an exemplary embodiment of the present application;

fig. 4 is a flowchart illustrating a cell access method according to an exemplary embodiment of the present application;

fig. 5 is a flowchart illustrating a cell access method according to another exemplary embodiment of the present application;

fig. 6 is a flowchart illustrating a cell access method according to another exemplary embodiment of the present application;

fig. 7 is a flowchart illustrating a cell access method according to another exemplary embodiment of the present application;

fig. 8 is a flowchart illustrating a cell access method according to another exemplary embodiment of the present application;

fig. 9 is a flowchart illustrating a cell access method according to another exemplary embodiment of the present application;

fig. 10 is a block diagram of a cell access device provided in an exemplary embodiment of the present application;

fig. 11 shows a schematic structural diagram of a computer device provided in an exemplary embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "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.

Currently in the 5G network deployment phase, due to high cost and complex deployment, the third Generation Partnership Project (3 GPP) is divided into independent networks and dependent networks for deployment, which lists 8 different 5G network architectures including Option 1, Option 2, Option 3/3a, Option 4/4a, Option 5, Option 6, Option 7/7a, and Option 8/8 a. The independent networking is to establish an existing network, including a new access network device (including a new base station), a backhaul link and a core network, and the non-independent networking is to use an existing 4G infrastructure to deploy a 5G network; wherein, the Option 1, the Option 2, the Option 5 and the Option 6 in the 8 5G architectures belong to an independent networking mode, and the rest belong to a non-independent networking mode.

In the version released in 3 months in 2017, 5G architectures such as Option 2, Option 3/3a/3x, Option 4/4a, Option 5, Option 7/7a/7x and the like are preferred (and 2 sub options 3x and 7x are added at the same time). The independent networking mode still has two options of Option 2and Option 5.

Illustratively, as shown in fig. 1, the networking of Option 2 is an NR in-cell network composed of a 5G core network and 5G base stations. As shown in fig. 1, the Option of Option 3x is mainly used for networking, where a 4G core network is used, and a 4G base station is used as a master station and a newly deployed 5G base station is used as a slave station; that is, a Long Term Evolution (LTE) Cell is used as an anchor access, and an NR Cell is added as a Secondary Cell Group (SCG). Wherein, the solid line represents the user plane, representing the transmitted data; the dashed line represents the control plane, representing the commands for transmitting management and scheduling data.

For example, a dual-mode site has the admission capacity of both non-independent networking and independent networking, as shown in fig. 2, through the functions of directional migration of independent networking and the like and the setting of network management mobility threshold parameters, it is ensured that an independent networking user preferentially accesses to an independent networking frequency point, or after the independent networking user accesses to an LTE cell, the user is actively switched or redirected to an NR cell supporting independent networking, so that the effect that the coverage area 12 of independent networking is greater than the coverage area 14 of non-independent networking is achieved.

In the process of accessing the NR cell, a terminal firstly requests to access the NR cell in an independent networking mode, a protocol requires that the access level of the terminal when the terminal is accessed to the NR cell in the independent networking mode is necessarily greater than the minimum access level of the NR cell, and if the terminal cannot meet the protocol requirement, the terminal is switched to a non-independent networking mode to access the NR cell; in the process of accessing the NR cell in the non-independent networking mode, the terminal executes a B1 event (i.e., the quality of the neighbor cell of the different system is higher than the first threshold) issued by the access network (including the base station), and then reports the measurement result of the B1 event to the access network. Wherein the measurement result is a measurement result of cell quality; illustratively, the cell quality is expressed in terms of access level, and the measurement result includes the measured access level of the terminal in the cell. Generally, the measurement threshold of a B1 event configured by an access network is low, which causes the access network to determine that a terminal meets an access condition of an NR Cell in an independent networking mode, and therefore, the access network does not add a Secondary Cell Group (SCG), but redirects the terminal to perform NR Cell access in the independent networking mode; the terminal accesses the NR cell again in the independent networking mode, and at this time, the situation that the terminal cannot meet the protocol requirement occurs, so that the terminal is switched to the non-independent networking mode again to access the NR cell, and when the terminal accesses the NR cell, the terminal is repeatedly switched between the independent networking mode and the non-independent networking mode, so that the network of the terminal is unavailable, and the service is blocked.

In order to avoid that the terminal repeatedly switches between the independent networking mode and the non-independent networking mode in the access process of the NR cell, the present application provides a cell access method, and please refer to the following embodiments for details of implementation of the method.

Fig. 3 illustrates a block diagram of a communication system provided by an exemplary embodiment of the present application. The communication system may include: access network 22 and terminal 24.

Several access network devices 220 are included in access network 22. The access network equipment 220 may be a base station, which is a device deployed in an access network to provide wireless communication functions for terminals. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example in LTE systems, called eNodeB or eNB; in a 5G NR-U system, it is called gNodeB or gNB. The description of "base station" may change as communication technology evolves. For convenience of this embodiment, the above-mentioned devices providing the terminal 24 with the wireless communication function are collectively referred to as access network equipment.

An area covered by the access network device 220, which may be referred to as a cell or a cell; within a cell, terminal 24 may communicate with access network device 220 over a wireless channel. As in fig. 2, two neighbor cells are shown: cell a and cell B.

The terminal 24 may include various handheld devices, vehicle mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication capabilities, as well as various forms of user equipment, Mobile Stations (MSs), terminal equipment (terminal device), and so forth. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. Access network equipment 220 and terminal 24 communicate with each other over some air interface technology, such as a Uu interface.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile Communication (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD) System, an LTE-Advanced Long Term Evolution (LTE-A) System, a New wireless (New Radio, NR) System, an Evolution System of an NR System, an LTE-based Access (LTE-to-non-licensed) System, a UMTS-based Access (UMTS-to-non-licensed) System, a UMTS-UMTS System, a UMTS-Universal Mobile Access (UMTS) System, WiMAX) communication system, Wireless Local Area Network (WLAN), Wireless Fidelity (WiFi), next generation communication system, or other communication system.

Generally, the conventional Communication system supports a limited number of connections and is easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, Device-to-Device (D2D) Communication, Machine-to-Machine (M2M) Communication, Machine Type Communication (MTC), Vehicle-to-Vehicle (V2V) Communication, and Vehicle networking (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

Fig. 4 shows a flowchart of a cell access method according to an exemplary embodiment of the present application. The cell access method may be applied to a terminal of the communication system shown in fig. 3. In fig. 4, the cell access method includes:

step 310: and under the condition that the access to the first NR cell fails in the independent networking mode, adding the first NR cell into a blacklist of the terminal.

The independent networking refers to a completely independent network; for example, the independent networking is a completely independent 5G network. The first NR cell refers to an NR cell in an independent networking mode, that is, the first NR cell is an independently networked NR cell. The blacklist is used for recording the cells which the terminal cannot access in the independent networking mode. Illustratively, the black list is used to record NR cells that the terminal cannot access in the standalone networking mode.

In the process of cell selection, the terminal searches under an independent networking mode to obtain at least one candidate first NR cell; determining a first NR cell with the best channel quality and access level from at least one candidate first NR cell; determining that the access to the first NR cell fails under the condition that the terminal does not meet the cell access requirement of the first NR cell; and under the condition that the terminal fails to access the first NR cell, adding the first NR cell into a blacklist of the terminal.

In another situation, in the process of cell selection, the terminal searches for at least one candidate first NR cell in an independent networking mode; determining a first NR cell with the best channel quality and access level from at least one candidate first NR cell; requesting to access the first NR cell from an access network under the condition that a terminal meets the cell access requirement of the first NR cell; and under the condition that the request for accessing the first NR cell fails, adding the first NR cell into a blacklist of the terminal.

Wherein, the access level is the access level measured by the terminal in the cell; the above access level is best, which means the access level is maximum. The channel quality refers to the channel quality measured by the terminal in a cell; the above-mentioned best channel quality means the highest channel quality. Illustratively, the channel quality may be represented by at least one of a Signal-to-Noise Ratio (SNR), a Reference Signal Received Power (RSRP), (Signal-to-Interference plus Noise Radio (SINR)), a Received Signal Strength Indicator (RSSI), and a Reference Signal Received quality (RSRO).

The cell access requirements of the first NR cell include: the access level of the terminal in the first NR cell is greater than the minimum access level of the first NR cell; or, the S-criterion for the first NR cell. The minimum access level refers to the minimum level that a terminal allowed by a cell to access the cell. Illustratively, the cell access condition of the first NR cell is configured by the access network for the terminal through a system message; or, as specified by a protocol.

Illustratively, the cell selection procedure includes at least one of an initial cell selection procedure and a cell reselection procedure.

Step 320: and under the condition that the first NR cell is failed to be accessed in the independent networking mode, switching from the independent networking mode to the non-independent networking mode.

And the terminal is also automatically switched to a non-independent networking mode from the independent networking mode under the condition that the terminal fails to access the first NR cell in the independent networking mode.

It should be noted that, in this application, it is not limited to the execution sequence of the steps of "adding the first NR cell to the blacklist of the terminal" and "switching from the independent networking mode to the dependent networking mode" after the terminal fails to access the first NR cell in the independent networking mode, and this embodiment only takes the example of executing the above two steps at the same time to perform an exemplary description.

Step 330: and in the process of carrying out cell access in the non-independent networking mode, redirecting to a second NR cell except the cell in the blacklist for requesting access in the independent networking mode based on the received redirection instruction of the access network.

The non-independent networking is a network constructed on the basis of an existing network; for example, the non-independent networking is a 5G network built on the basis of a 4G network. The second NR cell refers to an NR cell in an independent networking mode, that is, the second NR cell is an independently networked NR cell.

The terminal searches for at least one candidate second NR cell meeting respective cell access conditions in a non-independent networking mode, measures each candidate second NR cell in the at least one candidate second NR cell, and reports the cell measurement result of the at least one candidate second NR cell to an access network; the access network makes a decision based on the reported cell measurement result of at least one candidate second NR cell, and sends a redirection instruction to the terminal under the condition that cells which simultaneously support independent networking and non-independent networking exist in the at least one candidate second NR cell; and the terminal redirects the request to access a second NR cell except the cells in the blacklist in the independent networking mode based on the redirection instruction sent by the access network. The at least one candidate second NR cell includes a second NR cell.

Illustratively, the redirection indication carries a redirection frequency point; after receiving the redirection instruction, the terminal switches back to the independent networking mode from the dependent networking mode, and searches at least one target cell corresponding to the redirection frequency point in the independent networking mode; and determining a second NR cell except the cell in the blacklist from the at least one target cell, and requesting access in the second NR cell.

Illustratively, there are at least two target cells that are not on the blacklist; and the terminal determines a second NR cell with the best channel quality and access level from at least two target cells except the cells in the blacklist.

Illustratively, the redirection frequency point includes the frequency point of the cell which supports both independent networking and non-independent networking. Accordingly, the first NR cell and the second NR cell are either intra-frequency cells or inter-frequency cells. The common-frequency cells refer to cells with the same frequency point; the pilot frequency cell refers to a cell with different frequency points; a frequency point is a certain frequency.

Illustratively, the above-mentioned cell access condition is configured for the terminal by the access network for the capability of the terminal to support non-independent networking. Alternatively, the above-mentioned cell access condition is specified by a protocol for the capability of the terminal to support non-independent networking.

To sum up, in the cell access method provided in this embodiment, after the terminal fails to access the first NR cell in the ad hoc network mode, adding the first NR cell to a blacklist of the terminal and switching from the independent networking mode to the dependent networking mode, the cell access is carried out under the non-independent networking mode, when the redirection instruction of the access network is received under the non-independent networking mode, switching to the independent networking mode again for cell access, at this time, the terminal requests access to a second NR cell except the cell in the blacklist, namely, when the access is redirected, the terminal is prevented from selecting the first NR cell access again through the blacklist, therefore, the terminal is prevented from being continuously switched between the independent networking mode and the non-independent networking mode, the terminal can be more quickly accessed into a network, smooth transmission of data is guaranteed, and the phenomenon of traffic jam is avoided.

In some embodiments, the terminal has an alternative blacklist in addition to the blacklist; after a terminal fails to access a first NR cell for the first time, adding the first NR cell into an alternative blacklist; after the second access to the first NR cell fails, adding the first NR cell into a blacklist; therefore, through the arrangement of the blacklist and the alternative blacklist, the terminal does not try to access the NR cell after two times of access failures of the same NR cell in independent networking, so that repeated switching of the terminal between an independent networking mode and a non-independent networking mode can be avoided to a certain extent, and the situation that the terminal cannot access the cell with the best channel quality and access level in the independent networking mode due to access failure caused by network congestion can be avoided.

Illustratively, after the terminal fails to access the first NR cell for the first time in the independent networking mode, the first NR cell is added to the alternative blacklist, and the terminal is switched from the independent networking mode to the dependent networking mode; in the process of cell access in a non-independent networking mode, based on a received redirection instruction of an access network, redirecting to a cell which requests cell access except for cells in a blacklist in the independent networking mode; under the condition that the cell is a first NR cell in the alternative blacklist and the first NR cell is accessed again and fails, adding the first NR cell to the blacklist and deleting the first NR cell in the alternative blacklist; and deleting the first NR cell in the alternative blacklist under the condition that the cell is the first NR cell in the alternative blacklist and the first NR cell is accessed again successfully. That is, after the terminal fails to access the first NR cell twice, the first NR cell is added to the blacklist, so as to avoid the occurrence of access failure caused by network congestion, which may cause the terminal to be unable to access the first NR cell with the best channel quality and access level in the independent networking mode.

Fig. 5 is a flowchart illustrating a cell access method according to an exemplary embodiment of the present application. The cell access method may be applied to the communication system shown in fig. 3. In fig. 5, the cell access method includes:

step 410: and under the condition that the terminal fails to access the first NR cell in the independent networking mode, adding the first NR cell into a blacklist of the terminal, and switching from the independent networking mode to the non-independent networking mode.

The detailed implementation of step 410 can refer to steps 310 to 320 in fig. 3, and will not be described herein.

Step 420: and the terminal searches for a second NR cell which meets the cell access condition and is not in the blacklist in the non-independent networking mode.

The terminal searches for a cell and searches for at least one candidate second NR cell meeting the cell access condition in a non-independent networking mode; a second NR cell other than the blacklisted cells is determined from the at least one candidate second NR cell.

For example, as shown in fig. 6, the terminal searching for the second NR cell may be implemented by the terminal interacting with the access network in steps 421 to 426, as follows:

421, the terminal reports the capability of the terminal supporting the dependent networking to the access network.

After the terminal is switched from the independent networking mode to the dependent networking mode, that is, under the condition that the terminal supports dependent networking, the terminal firstly reports the capability of the terminal supporting dependent networking to the access network. Illustratively, the terminal supports non-independent networking, that is, 5G network communication supporting non-independent networking.

422, the access network issues a configuration signaling based on the capability of the terminal supporting the non-independent networking, and the configuration signaling is used for configuring the inter-system measurement event and the target frequency point for the terminal.

Illustratively, the inter-system measurement event is used for measuring a cell meeting a cell access condition. In this embodiment, inter-system handover refers to inter-operation between NR and LTE systems. For example, when the terminal is switched from the NR system to the LTE system, the different system refers to the LTE system; when switching from the LTE system to the NR system, the different system is the NR system.

Optionally, the inter-system measurement event comprises at least one of a B1 event and a B2 event. Wherein, the Event B1 is that the quality of the inter-system neighbor cell is higher than the threshold1 (i.e. Event B1-NR: NR neighbor beacons threshold 1); the B2 Event is that the quality of the main Serving cell is lower than the threshold2, and the quality of the inter-system neighbor cells is higher than the threshold3 (i.e. Event B2-NR: Serving beacons word threshold2and NR neighbor beacons beta threshold 3); where threshold3 is higher than threshold 2. Illustratively, the threshold for the required cell quality in the cell access condition is above threshold1, threshold2, and threshold 3. It should be noted that the inter-system measurement event is defined by the 3rd Generation Partnership Project (3 GPP) specification 38.311 for NR.

The access network receives the reported capability of the terminal for supporting the non-independent networking, configures the different system measurement event and the target frequency point for the terminal, and generates a configuration signaling to be sent to the terminal, so that the terminal searches the cell which accords with the different system measurement event on the target frequency point. Illustratively, the target frequency points include at least one.

423, the terminal receives the configuration signaling sent by the access network based on the capability of the terminal to support the non-independent networking.

Illustratively, the configuration signaling may include Radio Resource Control (RRC) signaling.

424, the terminal searches at least one cell corresponding to the target frequency point in the non-independent networking mode.

And the terminal searches the cell under the target frequency point in the non-independent networking mode to obtain at least one cell. If the target frequency points include at least two and at least two cells obtained by searching under the target frequency points, the at least two cells include common-frequency cells and/or different-frequency cells, that is, under the condition that three or more cells are obtained by searching, the three or more cells can include both common-frequency cells and different-frequency cells. For example, a target frequency point 1 and a target frequency point 2 exist, a cell 1 is obtained by searching under the target frequency point 1, a cell 2and a cell 3 are obtained by searching under the target frequency point 2, and the cell 2and the cell 3 are the same-frequency cells; cell 1 and cell 2 are pilot frequency cells, and cell 1 and cell 3 are also pilot frequency cells, i.e. the frequency of cell 1 is different from the frequency of cell 2and cell 3.

425, the terminal performs inter-system measurement event for at least one cell, resulting in at least one candidate second NR cell.

And the terminal executes the inter-system measurement event to obtain a cell measurement result of each cell, and determines at least one candidate second NR cell meeting the inter-system measurement event from at least one cell. Taking the inter-system measurement event as the B1 event as an example, the terminal determines at least one candidate second NR cell having a cell quality higher than a first threshold (i.e., threshold1) from among the at least one cell. The cell quality may be expressed in terms of signal quality, or channel quality, or access level. In the case where the cell quality is expressed in terms of signal quality, the first threshold comprises a signal quality threshold; in the case where the cell quality is expressed in terms of channel quality, the first threshold comprises a channel quality threshold; in case the cell quality is expressed in access level, the first threshold comprises an access level threshold. Illustratively, the access level threshold is less than a minimum access level of the cell. The minimum access level of a cell is configured by the access network or by protocol requirements.

Illustratively, the cell measurement result includes the measured channel quality and access level of the cell.

The terminal determines 426 a second NR cell other than the blacklisted cell from the at least one candidate second NR cell.

In some embodiments, after the terminal searches for at least one cell corresponding to the target frequency point in the non-independent networking mode, at least one candidate second NR cell except for the blacklist may be determined from the at least one cell; and then executing the inter-system measurement event, and determining a second NR cell meeting the cell access condition. That is, the present application does not limit the order of execution of step 425 and step 426.

Step 430: and the terminal reports the cell measurement result of the second NR cell to the access network.

Illustratively, the second NR cell includes at least one; and the terminal reports the cell measurement result of at least one second NR cell to the access network.

Step 440: the access network sends a redirection indication generated based on the cell measurement result of the second NR cell to the terminal.

When the access network determines that cells which simultaneously support independent networking and non-independent networking exist in at least one second NR cell, the frequency point of the cell which simultaneously supports independent networking and non-independent networking is determined as a redirection frequency point, and a redirection instruction is generated based on the redirection frequency point so as to instruct a terminal to search cell access under the redirection frequency point in an independent networking mode. Illustratively, the redirection indication may include radio resource control, RRC, signaling.

Step 450: the terminal receives a redirection indication generated by the access network based on the cell measurement result of the second NR cell.

Step 460: the terminal redirects to the independent networking mode to request access in the second NR cell based on the redirection indication.

The redirection indication also carries a redirection frequency point; the terminal switches back to the independent networking mode from the dependent networking mode based on the redirection indication; searching at least one target cell corresponding to the redirection frequency point in an independent networking mode; and determining a second NR cell except the cell in the blacklist from the at least one target cell, and requesting access in the second NR cell. Wherein the terminal satisfies a cell access condition of the second NR cell.

Illustratively, the at least one target cell includes a first NR cell and a second NR cell.

It should be noted that the second NR cell obtained by searching again in step 460 may be a part of or all of the second NR cells reported in step 450.

For example, if there are at least two second NR cells, a target second NR cell with the best channel quality and access level is determined from the at least two second NR cells, and access to the target second NR cell is requested if the terminal satisfies a cell access condition of the target second NR cell and the target second NR cell is not on the blacklist.

Illustratively, the access condition of the target second NR cell includes that the access level of the terminal at the target second NR cell is greater than the minimum access level of the target second NR cell.

For example, there may be cells in the blacklist where signals cannot cover the location of the terminal, and in order to avoid traversing each cell in the blacklist, when the terminal screens out the cells in the blacklist, the terminal first determines a valid blacklist cell. Illustratively, in the case that the location of the terminal is within the coverage of the blacklist cell, the blacklist cell is determined to be a valid blacklist cell. Accordingly, the terminal requests access to a second NR cell other than the valid blacklisted cells.

In summary, in the cell access method provided in this embodiment, in the process of performing cell access when the terminal is redirected to the independent networking mode in the non-independent networking mode, when the terminal selects a cell to be accessed again, the cell in the blacklist is screened out, that is, the first NR cell is screened out, so that repeated switching between the independent networking mode and the non-independent networking mode due to a request for accessing the first NR cell again is avoided.

For example, as shown in fig. 7, before performing step 310, the terminal performs the following steps 340 to 350 to determine that the first NR cell fails to access, as follows:

step 340: and searching to obtain a first NR cell with the best channel quality in the independent networking mode.

The terminal searches for at least one candidate first NR cell in an independent networking mode; and determining the first NR cell with the best channel quality and access level from the at least one candidate first NR cell.

Step 350: and determining that the first NR cell fails to be accessed under the condition that the access level of the first NR cell is less than the minimum access level required by the first NR cell.

In summary, the cell access method provided in this embodiment can quickly determine whether the terminal can access the first NR cell in the ad hoc networking mode.

There is also a case that the terminal directly accesses in the non-independent networking mode by using the LTE cell as the primary cell and the second NR cell as the secondary cell, and for example, as shown in fig. 8, a method flowchart of a cell access method provided in an exemplary embodiment of the present application is shown. The cell access method may be applied to a terminal of the communication system shown in fig. 3. In fig. 8, the cell access method includes:

step 510: and under the condition that the access to the first NR cell fails in the independent networking mode, adding the first NR cell into a blacklist of the terminal, and switching from the independent networking mode to the non-independent networking mode.

The detailed implementation of step 510 can refer to steps 310 to 320 in fig. 3, which are not described herein again.

Step 520: and carrying out cell access by taking the LTE cell as a main cell and the second NR cell as an auxiliary cell in a non-independent networking mode.

The LTE cell is determined when the access network organizes the network for the terminal. Illustratively, the LTE cell is a heterogeneous system cell of the second NR cell.

Exemplarily, after the terminal is switched to the non-independent networking mode, reporting the capability of the terminal for supporting the non-independent networking to the access network; receiving a configuration signaling issued by an access network based on the capability of a terminal supporting non-independent networking, wherein the configuration signaling is used for configuring an inter-system measurement event and a target frequency point for the terminal, and the inter-system measurement event is used for measuring a cell meeting a cell access condition; searching at least one cell corresponding to a target frequency point in a non-independent networking mode; executing a different system measurement event aiming at least one cell to obtain at least one candidate second NR cell; determining a second NR cell other than the blacklisted cells from the at least one candidate second NR cell; reporting the cell measurement result of the second NR cell to an access network; and the access network makes a decision based on the cell measurement result of the second NR cell, and performs cell access by taking the LTE cell as a main cell and the second NR cell as an auxiliary cell under the condition that the terminal does not accord with the access condition of accessing the second NR cell in an independent networking mode. Illustratively, the access of the terminal to the NR cell of the non-independent network is controlled by the access network through the 4G anchor point.

Optionally, the inter-system measurement event comprises at least one of a B1 event and a B2 event.

In summary, the cell access method provided in this embodiment may perform access in a non-independent networking mode under the condition that the cell cannot be accessed in the independent networking mode, so as to ensure that the network of the terminal is available and avoid service interruption.

For example, after the cell access, the terminal further performs a cell reselection process to access a cell with better communication quality, as shown in fig. 9, taking as an example that after the terminal accesses the cell in the non-independent networking mode, the cell reselection is described, and after step 520, the following step is further included:

step 530: and after the terminal accesses the cell in the non-independent networking mode, executing a cell reselection process.

After the terminal accesses the cells in the non-independent networking mode, the terminal continues to measure each cell so as to reselect a more appropriate resident cell.

Step 540: and the terminal requests to access other cells except the cell in the blacklist in the independent networking mode in the cell reselection process.

In the process of cell reselection, the terminal measures other cells which accord with cell access conditions and are not in the blacklist; and requesting to access the other cells in the independent networking mode. If the terminal is successfully accessed to other cells, communication is carried out in other cells; and if the terminal fails to access other cells, the terminal returns back to the cell under the non-independent networking mode for communication.

In summary, the cell access method provided in this embodiment may select a more suitable camping cell through a cell reselection process.

In order to be able to access the first NR cell again, the terminal also periodically cleans up the blacklist, for example, the following manner may be adopted:

firstly, a terminal starts a timer under the condition that a first NR cell which fails to be accessed is added to a blacklist in an initial state; in case the timing of the timer is reached, the cells in the blacklist are cleared.

The initial state refers to a state in which the number of cells in the blacklist is zero. That is, before adding the first NR cell that fails to be accessed, the terminal determines that the number of cells in the blacklist is zero, and starts the timer while adding the first NR cell to the blacklist; in case the timing of the timer is reached, the cells in the blacklist are cleared. Illustratively, the blacklisted cells include a first NR cell.

For example, when the terminal adds a first NR cell that fails to access to the black list in the initial state, the terminal starts a 12-hour countdown timer to remove the cell in the black list after 12 hours; starting from the moment the first blacklisted cell (i.e. the first NR cell) joins, the terminal clears all cells in the blacklist after 12 hours.

Secondly, the terminal clears the cells in the blacklist according to the designated period.

Illustratively, the terminal clears the blacklisted cells at zero time of day.

And thirdly, the terminal clears the cell with the storage time length exceeding the specified storage time length in the blacklist.

Illustratively, the terminal traverses the cells in the blacklist every 5 minutes, and deletes the cells stored in the blacklist for more than 6 hours.

The above-mentioned clearance mode of blacklist makes the terminal station after a period of time, can also insert the cell of the independent network deployment again, avoid the permanent forbidding of the cell that causes because of the cell signal quality of a moment is too poor.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Fig. 10 shows a block diagram of a cell access apparatus according to an exemplary embodiment of the present application. The cell access means may be implemented as all or part of a terminal in software, hardware or a combination of both. The device includes:

an adding module 610, configured to add the first NR cell to a blacklist of the terminal under a condition that access to the first NR cell in the independent networking mode fails; and

a switching module 620, configured to switch from the independent networking mode to the dependent networking mode when access to the first NR cell fails in the independent networking mode;

an accessing module 630, configured to, in the process of performing cell access in the non-independent networking mode, redirect to a second NR cell, which is requested to be accessed in a cell other than the cell in the blacklist, in the independent networking mode based on the received redirection instruction of the access network.

In some embodiments, access module 630 is configured to:

searching to obtain a second NR cell which accords with the cell access condition and is not in a blacklist in a non-independent networking mode;

reporting the cell measurement result of the second NR cell to an access network;

receiving a redirection indication generated by the access network equipment based on a cell measurement result of the second NR cell;

requesting access at the second NR cell based on the redirection indication to the ad-hoc networking mode.

In some embodiments, access module 630 is configured to:

searching and obtaining at least one candidate second NR cell meeting the cell access condition in a non-independent networking mode;

a second NR cell other than the blacklisted cells is determined from the at least one candidate second NR cell.

In some embodiments, access module 630 is configured to:

reporting the capability of the terminal for supporting the non-independent networking to an access network;

receiving a configuration signaling issued by an access network based on the capability of a terminal supporting non-independent networking, wherein the configuration signaling is used for configuring a different system measurement event and a target frequency point for the terminal, and the different system measurement event is used for measuring a cell meeting a cell access condition;

searching at least one cell corresponding to a target frequency point in a non-independent networking mode;

and executing the inter-system measurement event aiming at least one cell to obtain at least one candidate second NR cell.

In some embodiments, the inter-system measurement event comprises a B1 event.

In some embodiments, the redirection indication also carries a redirection frequency point; an access module 630, configured to:

switching from the non-standalone networking mode back to the standalone networking mode based on the redirection indication;

searching at least one target cell corresponding to the redirection frequency point in an independent networking mode;

and determining a second NR cell except the cell in the blacklist from the at least one target cell, and requesting access in the second NR cell.

In some embodiments, the apparatus further comprises:

a searching module 640, configured to search for a first NR cell with the best channel quality in an independent networking mode;

an accessing module 630, configured to determine that accessing the first NR cell fails if an access level of the first NR cell is less than a minimum access level required by the first NR cell.

In some embodiments, the first NR cell and the second NR cell are intra-frequency cells or inter-frequency cells.

In some embodiments, the access module 630 is configured to perform cell access in a non-independent networking mode by using an LTE cell as a primary cell and using a second NR cell as a secondary cell, where the LTE cell is determined when an access network performs networking for a terminal.

In some embodiments, the apparatus further comprises:

a clearing module 650, configured to start a timer when a first NR cell that fails to be accessed is added to a blacklist in an initial state, where the initial state is a state where the number of cells in the blacklist is zero; removing the cells in the blacklist under the condition of reaching the timing of the timer;

or, the clearing module 650 is configured to clear the cells in the blacklist according to a specified period;

or, the clearing module 650 is configured to clear the cells in the blacklist whose storage duration exceeds the specified storage duration.

To sum up, in the cell access apparatus provided in this embodiment, after the apparatus fails to access the first NR cell in the ad hoc network mode, adding the first NR cell to a blacklist of the terminal and switching from the independent networking mode to the dependent networking mode, the cell access is carried out under the non-independent networking mode, when the redirection instruction of the access network equipment is received under the non-independent networking mode, switching to the independent networking mode for cell access again, at this time, the device requests access to a second NR cell except the blacklisted cell, i.e., when redirecting access, the first NR cell access is avoided from being selected again by the blacklist, therefore, the terminal is prevented from being continuously switched between the independent networking mode and the non-independent networking mode, the terminal can be more quickly accessed into a network, smooth transmission of data is guaranteed, and the phenomenon of traffic jam is avoided.

Fig. 11 shows a schematic structural diagram of a computer device provided in an exemplary embodiment of the present application. The computer device may be a device that performs the cell access method as provided herein, and the computer device may be a terminal. Specifically, the method comprises the following steps:

the computer device 700 includes a Central Processing Unit (CPU) 701, a system Memory 704 including a Random Access Memory (RAM) 702 and a Read Only Memory (ROM) 703, and a system bus 705 connecting the system Memory 704 and the Central Processing Unit 701. The computer device 700 also includes a basic Input/Output System (I/O) 706 for facilitating information transfer between devices within the computer, and a mass storage device 707 for storing an operating System 713, application programs 714, and other program modules 715.

The basic input/output system 706 includes a display 708 for displaying information and an input device 709, such as a mouse, keyboard, etc., for a user to input information. Wherein the display 708 and the input device 709 are connected to the central processing unit 701 through an input output controller 710 connected to the system bus 705. The basic input/output system 706 may also include an input/output controller 710 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, input-output controller 710 may also provide output to a display screen, a printer, or other type of output device.

The mass storage device 707 is connected to the central processing unit 701 through a mass storage controller (not shown) connected to the system bus 705. The mass storage device 707 and its associated computer-readable media provide non-volatile storage for the computer device 700. That is, the mass storage device 707 may include a computer-readable medium (not shown) such as a hard disk or Compact Disc Read Only Memory (CD-ROM) drive.

Computer-readable media may include computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash Memory or other Solid State Memory technology, CD-ROM, Digital Versatile Disks (DVD), or Solid State Drives (SSD), other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage, or other magnetic storage devices. The Random Access Memory may include a resistive Random Access Memory (ReRAM) and a Dynamic Random Access Memory (DRAM). Of course, those skilled in the art will appreciate that computer storage media is not limited to the foregoing. The system memory 704 and mass storage device 707 described above may be collectively referred to as memory.

According to various embodiments of the present application, the computer device 700 may also operate as a remote computer connected to a network via a network, such as the Internet. That is, the computer device 700 may be connected to the network 712 through the network interface unit 711 connected to the system bus 705, or may be connected to other types of networks or remote computer systems (not shown) using the network interface unit 711.

The memory further includes one or more programs, which are stored in the memory and configured to be executed by the CPU to implement the cell access method as described above.

The embodiment of the present application further provides a computer-readable storage medium, where at least one instruction is stored, and the at least one instruction is loaded and executed by a processor to implement the cell access method according to the above embodiments.

Optionally, the computer-readable storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a Solid State Drive (SSD), or an optical disc. The Random Access Memory may include a resistive Random Access Memory (ReRAM) and a Dynamic Random Access Memory (DRAM).

It should be noted that: in the cell access apparatus provided in the foregoing embodiment, when executing the cell access method, only the division of the functional modules is illustrated, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the cell access apparatus and the cell access method provided in the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the implementation of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for cell access, the method comprising:

under the condition that access to a first new air interface NR cell fails in an independent networking mode, adding the first NR cell into a blacklist of a terminal; and

2. The method of claim 1, wherein the redirecting to the standalone networking mode requesting access to a second NR cell other than the blacklisted cells based on the received redirection indication of the access network during the cell access in the non-standalone networking mode comprises:

searching for the second NR cell which meets the cell access condition and is not in the blacklist in the non-independent networking mode;

reporting the cell measurement result of the second NR cell to the access network;

receiving the redirection indication generated by the access network based on the cell measurement result of the second NR cell;

redirecting to the request for access at the second NR cell in the ad-hoc networking mode based on the redirection indication.

3. The method of claim 2, wherein the searching for the second NR cell that meets a cell access condition and is not on the blacklist in the non-standalone networking mode comprises:

searching and obtaining at least one candidate second NR cell meeting the cell access condition in the non-independent networking mode;

determining the second NR cell other than the blacklisted cells from the at least one candidate second NR cell.

4. The method according to claim 3, wherein the searching for at least one candidate second NR cell satisfying the cell access condition in the non-standalone networking mode comprises:

reporting the capability of the terminal for supporting the non-independent networking to the access network;

receiving a configuration signaling issued by the access network based on the capability of the terminal supporting the non-independent networking, wherein the configuration signaling is used for configuring a different system measurement event and a target frequency point for the terminal, and the different system measurement event is used for measuring a cell meeting the cell access condition;

searching at least one cell corresponding to the target frequency point in the non-independent networking mode;

performing the inter-system measurement event for the at least one cell, resulting in the at least one candidate second NR cell.

5. The method of claim 4, wherein the inter-system measurement event comprises a B1 event.

6. The method of claim 2, wherein the redirection indication further carries a redirection frequency point;

the redirecting to the request for access at the second NR cell in the ad-hoc networking mode based on the redirection indication includes:

searching at least one target cell corresponding to the redirection frequency point in the independent networking mode;

determining the second NR cell except the cell in the blacklist from the at least one target cell, and requesting access in the second NR cell.

7. The method according to any of claims 1 to 6, wherein, in case of failure to access the first NR cell in standalone networking mode, before adding the first NR cell to a blacklist of terminals, comprising:

searching for the first NR cell with the best channel quality in the independent networking mode;

determining that accessing the first NR cell fails if an access level of the first NR cell is less than a minimum access level required by the first NR cell.

8. The method according to any of claims 1 to 6, wherein the first NR cell and the second NR cell are intra-frequency cells or inter-frequency cells.

9. The method of any of claims 1 to 6, further comprising:

and performing cell access by taking a Long Term Evolution (LTE) cell as a main cell and the second NR cell as an auxiliary cell in the non-independent networking mode, wherein the LTE cell is determined when the access network is used for networking the terminal.

10. The method of any of claims 1 to 6, further comprising:

starting a timer when the first NR cell which fails to be accessed is added to the blacklist which is in an initial state, wherein the initial state is a state that the number of the cells in the blacklist is zero; clearing the cells in the blacklist under the condition that the timing of the timer is reached;

or the like, or, alternatively,

removing the cells in the blacklist according to a specified period;

or the like, or, alternatively,

and removing the cells with the storage time length exceeding the specified storage time length in the blacklist.

11. A cell access apparatus, the apparatus comprising:

12. A terminal, characterized in that the terminal comprises:

a processor;

a transceiver coupled to the processor;

wherein the processor is configured to load and execute executable instructions to implement the cell access method of any of claims 1 to 10.

13. A computer-readable storage medium, in which program instructions are stored, which program instructions, when executed by a processor, implement the cell access method according to any one of claims 1 to 10.

14. A computer program, characterized in that the computer program comprises computer instructions, the computer instructions being stored in a computer-readable storage medium; a processor of a terminal reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the terminal to perform the cell access method according to any one of claims 1 to 10.