CN111436071B

CN111436071B - Network selection method, device, related equipment and storage medium

Info

Publication number: CN111436071B
Application number: CN201910031259.5A
Authority: CN
Inventors: 阮航
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2023-06-27
Anticipated expiration: 2039-01-14
Also published as: CN111436071A

Abstract

The invention discloses a network selection method, a network selection device, network equipment, a terminal and a storage medium. The method comprises the following steps: network equipment of a first network determines that a terminal fails to register in the first network; and releasing Radio Resource Control (RRC) connection and simultaneously transmitting frequency point information of a second network supporting non-independent Networking (NSA) to the terminal.

Description

Network selection method, device, related equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a network selection method, apparatus, related devices, and storage medium.

Background

As the fourth generation mobile communication technology (4G) enters the scale commercial stage, the fifth generation mobile communication technology (5G) oriented to 2020 and the future has become a global research and development hotspot. There are a number of different voice schemes for 5G, associated with different networking modes. Currently, the third generation partnership project (3 GPP) defines two schemes for 5G New Radio (NR) networking, which are independent networking (SA, standby) and Non-independent networking (NSA, non-standby) modes, respectively. In order to be compatible with different networking modes, the 5G terminal needs to support NSA and SA at the same time, and the typical terminal implementation scheme at present is an adaptive SA/NSA mode scheme, namely, the terminal can support two modes, but can only work in one mode at the same time and can be switched between the two modes.

However, in the related art, the 5G terminal has a longer power-on delay and network selection delay.

Disclosure of Invention

In order to solve the existing technical problems, the embodiment of the invention provides a network selection method, a network selection device, related equipment and a storage medium.

The embodiment of the invention provides a network selection method which is applied to network equipment of a first network, and comprises the following steps:

determining that the terminal fails to register in a first network;

and releasing Radio Resource Control (RRC) connection and simultaneously transmitting frequency point information of a second network supporting NSA to the terminal.

In the above scheme, the method further comprises:

issuing a measurement control message to the terminal; the measurement control message is at least used for indicating the terminal to measure all second network neighbor cells;

receiving measurement reports of all second network neighbor cells reported by the terminal; the measurement report comprises the frequency point and the signal strength of the second network neighbor cell;

selecting a second network neighbor cell which supports NSA and has highest signal strength according to the reported measurement report;

the transmitting the frequency point information of the second network supporting NSA to the terminal comprises the following steps:

and transmitting the frequency point information of the selected second network neighbor cell to the terminal.

In the above solution, the measurement control message is further configured to instruct the terminal to support NSA cells with high priority;

And preferentially receiving a measurement report of the second network neighbor cell supporting NSA, which is reported by the terminal.

In the above solution, the transmitting, to the terminal, frequency point information of the second network supporting NSA includes:

transmitting frequency point information of all second network neighbor cells to the terminal; and supporting the appointed position of the frequency point information of the second network neighbor cell of the NSA in the sequencing result of all the frequency point information.

In the above scheme, the issued frequency point information further includes priority information of at least one second network neighbor cell supporting NSA.

In the above solution, the determining that the terminal fails to register in the first network includes:

and receiving a signaling that the terminal fails to register in the first network, wherein the signaling is sent by the core network.

The embodiment of the invention also provides a network selection method which is applied to the terminal and comprises the following steps:

receiving frequency point information of a second network supporting NSA, which is issued by network equipment of a first network; the issued frequency point information is used for the terminal to access to a second network cell supporting NSA preferentially;

and accessing a second network cell supporting NSA according to the issued frequency point information.

In the above scheme, the method further comprises:

receiving a measurement control message issued by the network equipment;

Based on the issued measurement control message, measuring all second network neighbor cells;

reporting measurement reports of all second network neighbor cells to the network equipment;

the receiving the frequency point information of the second network supporting NSA, which is issued by the network equipment of the first network, comprises the following steps:

receiving frequency point information of a second network neighbor cell which supports NSA and has highest signal strength and is selected by the network equipment based on a measurement report;

and accessing a second network cell which supports NSA and has the highest signal strength.

and based on the measurement control message, preferentially measuring the second network neighbor supporting NSA, and reporting a measurement report of the second network neighbor supporting NSA.

In the above solution, the receiving frequency point information of the second network supporting NSA issued by the network device of the first network includes:

receiving frequency point information of all second network neighbor cells issued by the network equipment;

obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information;

and accessing the second network cell supporting NSA according to the obtained frequency point information of the second network neighbor cell supporting NSA.

In the scheme, the issued frequency point information comprises priority information of at least one second network neighbor cell supporting NSA;

and selecting a second network cell supporting NSA with high priority and accessing.

In the above scheme, the method further comprises:

preferentially carrying out cell search on a second network cell frequency point supporting NSA;

and after the search is completed, selecting a second network cell which supports NSA and has highest signal strength.

In the above scheme, the method further comprises:

and after the second network is successfully registered, taking the resident second network cell as the highest priority of the reselection of the second network cell.

In the above scheme, the method further comprises:

and when the second network cells supporting NSA do not exist, searching all the second network cells, selecting the second network cell with the highest signal strength, and accessing.

The embodiment of the invention also provides a network selecting device, which comprises:

a determining unit, configured to determine that the terminal fails to register in the first network;

and the first processing unit is used for transmitting the frequency point information of the second network supporting NSA to the terminal while releasing the RRC connection.

In the above scheme, the first processing unit is further configured to:

In the above solution, the first processing unit is specifically configured to:

the receiving unit is used for receiving frequency point information of a second network supporting NSA, which is issued by network equipment of the first network; the issued frequency point information is used for the terminal to access the second network cell supporting NSA preferentially;

and the second processing unit is used for accessing a second network cell supporting NSA according to the issued frequency point information.

In the above scheme, the receiving unit is further configured to receive a measurement control message sent by the network device;

the second processing unit is further configured to:

In the above solution, the receiving unit is specifically configured to: receiving frequency point information of all second network neighbor cells issued by the network equipment;

the second processing unit is specifically configured to: obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information;

The embodiment of the invention also provides a network device, which comprises:

a first processor configured to determine that a terminal fails to register in a first network;

and the first communication interface is used for transmitting the frequency point information of the second network supporting NSA to the terminal while releasing the RRC connection.

In the above solution, the first communication interface is further configured to: issuing a measurement control message to the terminal; the measurement control message is at least used for indicating the terminal to measure all second network neighbor cells; receiving measurement reports of all second network neighbor cells reported by the terminal; the measurement report comprises the frequency point and the signal strength of the second network neighbor cell;

The first processor is configured to select a second network neighbor cell supporting NSA and having a highest signal strength according to the reported measurement report;

the first communication interface is configured to send frequency point information of the selected second network neighbor cell to the terminal.

In the above scheme, the first communication interface is configured to send frequency point information of all second network neighboring cells to the terminal; and supporting the appointed position of the frequency point information of the second network neighbor cell of the NSA in the sequencing result of all the frequency point information.

The embodiment of the invention also provides a terminal, which comprises:

the second communication interface is used for receiving frequency point information of a second network supporting NSA, which is issued by the network equipment of the first network; the issued frequency point information is used for the terminal to access to a second network cell supporting NSA preferentially;

and the second processor is used for accessing a second network cell supporting NSA according to the issued frequency point information.

In the above scheme, the second communication interface is further configured to receive a measurement control message sent by the network device; reporting measurement reports of all second network neighbor cells to the network equipment;

the second processor is further configured to measure all second network neighbors based on the issued measurement control message;

The second communication interface is configured to receive frequency point information of a second network neighboring cell that supports NSA and has highest signal strength and is selected by the network device based on a measurement report;

the second processor is configured to access a second network cell that supports NSA and has a highest signal strength.

In the above scheme, the second communication interface is configured to receive frequency point information of all second network neighbors issued by the network device;

the second processor is specifically configured to: obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information; and accessing the second network cell supporting NSA according to the obtained frequency point information of the second network neighbor cell supporting NSA.

The embodiment of the invention also provides a network device, which comprises: a first processor and a first memory for storing a computer program capable of running on the processor,

the first processor is configured to execute any method step on the network device side when running the computer program.

The embodiment of the invention also provides a terminal, which comprises: a second processor and a second memory for storing a computer program capable of running on the processor,

And the second processor is used for executing any method step on the terminal side when the computer program is run.

The embodiment of the invention also provides a storage medium, on which a computer program is stored, the computer program, when executed by a processor, implements the steps of any method on the network device side or implements the steps of any method on the terminal side.

The network selection method, the network selection device, the related equipment and the storage medium provided by the embodiment of the invention, the network equipment of the first network determines that the terminal fails to register in the first network; releasing the RRC connection and simultaneously transmitting frequency point information of a second network supporting NSA to the terminal; and the terminal is accessed into a second network cell supporting NSA according to the issued frequency point information, and the terminal does not need to search the second network in full frequency band because the network side indicates the frequency point information of the second network supporting NSA, so that the time delay of starting up to select the network is greatly reduced, and the user experience is improved. Meanwhile, as the frequency point information of the second network supporting NSA is indicated, the terminal can be preferentially accessed into the second network cell supporting NSA, so that the terminal can perform the service of the first network, and the user experience is further improved.

Drawings

Fig. 1 is a schematic diagram of a power-on network selection process of a 5G terminal in the related art;

fig. 2 is a schematic flow chart of a method for network device-side network selection according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a method for selecting a network at a terminal side according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a method for selecting a network according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a power-on network selection process according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a priority of cell measurement configured in a measurement control message in an application embodiment of the present invention;

fig. 7 is a schematic diagram of priorities of cells configured in signaling in an application embodiment of the present invention;

FIG. 8 is a schematic diagram of a network selection device according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of another embodiment of a net selection device;

fig. 10 is a schematic diagram of a network device according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a terminal structure according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a network selection system according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

NSA refers to independent deployment of control plane (4G bearer control signaling) in the 4G network, deployment of user plane (5G and 4G networks carry user plane data) together in the 5G and 4G networks or independent deployment of user plane (only 5G network carries user plane data) in the 5G network, while SA refers to independent deployment of control plane and user plane (5G network independent bearer control signaling and user plane data) in the 5G network. For the SA mode, an end-to-end network of 5G needs to be deployed independently, and a base station and a core network are newly built, so that the 5G network can work independently of the 4G network. For the NSA mode, the existing 4G network can be relied on, so that the pre-sending requirement of part of operators on the 5G network is met.

In the related art, the 5G terminal adopts an adaptive selection SA or NSA mode. Specifically, for the 5G system, a mixed networking mode of NSA large network and SA private network is adopted, as shown in fig. 1, the starting-up network selection priority of the 5G terminal is 5>4, i.e. the 5G network is searched preferentially, if the terminal is in the area where the SA and NSA networks coexist, the SA private network is directly selected, if the terminal is not signed up in the SA private network, the SA network will refuse the registration of the terminal, and the terminal is registered in the 4G cell in turn; if the terminal is in the area with only NSA network, it will try to find SA private network first and register in 4G cell finally. In addition, when the terminal registers in a 4G cell, it does not distinguish between a 4G cell that does not support NSA network (4G only) and a 4G cell that supports NSA. Wherein, the 4G cell that does not support the NSA network refers to a cell that supports only the 4G network.

In the network selection process, the terminal searches for the 5G network in full frequency band first and then searches for the 4G network in full frequency band, so that the time delay of starting up the 5G terminal for network selection is longer.

In addition, when the terminal registers in the 4G cell, the 4G cell that does not support NSA and the 4G cell that supports NSA are not distinguished. Then for the 4G multi-carrier coverage area, the related art is that only one 4G cell upgrades support NSA, and the terminal does not distinguish between NSA-supporting networks and NSA-supporting 4G cells when searching for the 4G network, which may result in that the terminal does not necessarily camp on NSA-supporting 4G cells, but may choose to camp on cells that do not support NSA. If the terminal selects 4G cell camping without NSA support, it will happen that: firstly, the 5G service cannot be performed, and the user experience is poor; second, co-cell with normal 4G users, without splitting, results in a larger 4G cell load that does not support NSA.

Based on this, in various embodiments of the present invention, the network device of the first network issues frequency point information of the second network supporting NSA to the terminal while releasing the RRC connection, and the terminal indicates to access the second network cell supporting NSA preferentially according to the frequency point information.

In practical application, when the first network is a 5G network, the second network may be a 4G network.

The embodiment of the invention provides a network selection method, which is applied to network equipment of a first network, as shown in fig. 2, and comprises the following steps:

step 201: determining that the terminal fails to register in a first network;

here, in practical application, after the core network of the first network refuses the registration of the terminal, a signaling of registration failure is issued to the terminal, so that the core network can notify the network device of the registration failure of the terminal, thereby enabling the network device to determine that the terminal fails to register in the first network.

Based on this, in an embodiment, the implementation of this step includes:

That is, as long as the network device receives the signaling sent by the core network that the terminal fails to register in the first network, it can be determined that the terminal fails to register in the first network.

Step 202: and when the RRC connection is released, the frequency point information of the second network supporting NSA is issued to the terminal.

The issued frequency point information is used for the terminal to access to a second network cell supporting NSA preferentially.

In some scenarios, the data transmission speed of the first network may be higher than the data transmission speed of the second network. Here, in practical application, when the first network is a 5G network, the second network may be a 4G network. At this time, the network device is a next generation base station (gNB).

In the embodiment of the invention, the first network has two networking modes of SA and NSA, and for NSA, the first network is attached to the second network to work, but the second network is required to be upgraded to support, and often the upgrade is not complete, namely, all network elements in the second network are not used for supporting the first network.

In practical application, the network device can acquire which cells are cells supporting NSA and which cells are cells not supporting NSA through a network management system of the network device. In popular terms, which cells are NSA-supporting cells and which are non-NSA-supporting cells are configured in advance, so that the network device can issue frequency point information of a second NSA-supporting network to the terminal according to the frequency point information.

In practical application, the network device may implement issuing frequency point information of the second network supporting NSA to the terminal in the following two ways:

first, after the terminal measures and reports, it issues the frequency point information scheme of the second network cell

The basic idea of the first way is: the network equipment transmits a measurement control message, configures all second network neighbor frequency points, measures all second network neighbor frequency points after the terminal receives the measurement control message, reports measurement reports of all second network neighbor frequency points, selects a second network cell which supports NSA and has the strongest signal strength, and transmits frequency point information of the second network cell to the terminal while releasing RRC connection.

Specifically, the network device issues a measurement control message to the terminal; the measurement control message is at least used for indicating the terminal to measure all second network neighbor cells;

And after the network equipment receives the signaling that the terminal fails to register in the first network, which is sent by the core network, the network equipment issues a measurement control message to the terminal so as to select a neighboring cell of the second network supporting NSA.

In practical application, in order to reduce the time delay, the measurement at the terminal side may also be based on priority measurement, for example, the network device configures a second network neighboring cell frequency point supporting NSA in a measurement control message to be high priority, the terminal receives and preferentially measures the second network neighboring cell frequency point supporting NSA, immediately reports a measurement report after finishing the cell measurement, the base station selects a second network cell supporting NSA and having the strongest signal, and issues frequency point information of the cell to the terminal while releasing RRC connection. In this way, the network device can preferentially receive the measurement report of the second network neighbor cell supporting NSA, which is reported by the terminal, so as to quickly select the second network neighbor cell supporting NSA and having the highest signal strength.

Based on this, in an embodiment, the measurement control message is further configured to instruct the terminal to support NSA cells with high priority;

and the network equipment preferentially receives the measurement report of the second network neighbor cell supporting NSA, which is reported by the terminal.

And after receiving the frequency point information of the second network cell, the terminal selects the indicated second network cell which supports NSA to reside and initiates registration.

After successful registration, the terminal may take the resident NSA-supporting second network cell as the highest priority of the second network cell reselection.

In practical application, the measurement control message can be issued to the terminal through RRC signaling, so as to reduce signaling overhead. Wherein, the RRC signaling may be an RRC connection reconfiguration message or the like.

Second, the network device directly issues the second network adjacent cell frequency point information scheme

The basic idea of the scheme is as follows: the base station releases RRC connection and simultaneously transmits the frequency point information of all second network neighbor cells, the terminal can obtain the frequency point information of the second network neighbor cells supporting NSA at the appointed position in the ordering result of all the frequency point information after receiving the information, and the cell search is preferentially carried out on the frequency points of the second network cells supporting NSA; selecting a second network cell to camp on that supports NSA and has the strongest signal and initiating registration.

Specifically, frequency point information of all second network neighbor cells is issued to the terminal; and supporting the appointed position of the frequency point information of the second network neighbor cell of the NSA in the sequencing result of all the frequency point information.

In practical application, the issued frequency point information can also contain priority information of at least one second network neighbor cell supporting NSA; in this way, the terminal may select a second network cell residence supporting NSA with a high priority and initiate registration.

In actual application, one of the two modes is selected according to the need to realize the issuing of the frequency point information of the second network supporting NSA to the terminal.

Correspondingly, the embodiment of the invention also provides a network selection method which is applied to the terminal, as shown in fig. 3, and the method comprises the following steps:

step 301: receiving frequency point information of a second network supporting NSA, which is issued by network equipment of a first network;

here, the issued frequency point information is used for the terminal to access the second network cell supporting NSA preferentially.

Step 302: and accessing a second network cell supporting NSA according to the issued frequency point information.

As mentioned before, the network device may implement transmitting, to the terminal, frequency point information of the second network supporting NSA in the two manners;

correspondingly, when the network device issues the frequency point information of the second network supporting NSA to the terminal in the first mode, that is, the terminal measures and reports the frequency point information scheme of the second network cell, the terminal also needs to execute the following operations:

Receiving a measurement control message issued by the network equipment;

reporting all the measurement reports of the second network neighbor cells to the network equipment.

In this case, the terminal receives frequency point information of a second network neighbor cell which supports NSA and has the highest signal strength and is selected by the network device based on the measurement report; and accessing a second network cell which supports NSA and has the highest signal strength.

When the first mode is adopted, in order to reduce the time delay, the measurement at the terminal side can also be measurement based on priority, at this time, the measurement control message is further used for indicating that the terminal supports the NSA cell to have high priority, and the terminal preferentially measures the second network neighbor cell supporting the NSA based on the measurement control message and reports the measurement report of the second network neighbor cell supporting the NSA.

When the network equipment transmits the frequency point information of the second network supporting NSA to the terminal in the second mode, namely the network equipment directly transmits a second network adjacent cell frequency point information scheme, the terminal receives the frequency point information of all second network adjacent cells transmitted by the network equipment; obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information;

In one embodiment, the terminal preferentially performs cell search on a second network cell frequency point supporting NSA; and after the search is completed, selecting a second network cell which supports NSA and has highest signal strength.

In actual application, the issued frequency point information can also contain priority information of at least one second network neighbor cell supporting NSA; in this way, the terminal selects a second network cell supporting NSA with a high priority and accesses.

In practical application, after the second network is successfully registered, the terminal uses the resident second network cell as the highest priority of the second network cell reselection, so that the cell can be quickly selected later.

Of course, when there are no second network cells supporting NSA, the terminal searches all the second network cells, selects the second network cell with the highest signal strength, and accesses the second network cell.

The embodiment of the invention provides a network selection method, as shown in fig. 4, which comprises the following steps:

step 401: network equipment of a first network determines that a terminal fails to register in the first network;

step 402: the network equipment releases RRC connection and simultaneously transmits frequency point information of a second network supporting NSA to the terminal;

Step 403: the terminal receives frequency point information of a second network supporting NSA, which is issued by the network equipment;

step 404: and the terminal accesses a second network cell supporting NSA according to the issued frequency point information.

It should be noted that: the specific processing procedures of the network device and the terminal are described in detail above, and are not described in detail here.

According to the network selection method provided by the embodiment of the invention, network equipment of a first network determines that a terminal fails to register in the first network; releasing the RRC connection and simultaneously transmitting frequency point information of a second network supporting NSA to the terminal; and the terminal is accessed into a second network cell supporting NSA according to the issued frequency point information, and the terminal does not need to search the second network in full frequency band because the network side indicates the frequency point information of the second network supporting NSA, so that the time delay of starting up to select the network is greatly reduced, and the user experience is improved. Meanwhile, as the frequency point information of the second network supporting NSA is indicated, the terminal can be preferentially accessed into the second network cell supporting NSA, so that the terminal can perform the service of the first network, and the user experience is further improved.

In addition, when the network device issues the measurement control message to the terminal, the measurement control message is further used for indicating that the terminal supports NSA cells to have high priority, so that the measurement at the terminal side is based on the measurement of the priority, thereby further reducing the time delay and improving the user experience.

The embodiments of the present invention will be described in detail below with reference to application examples.

In an embodiment of the application of the present invention, the first network is a 5G network, and the second network is a 4G network. The network selecting process of the application embodiment of the invention, as shown in fig. 5, comprises the following steps:

firstly, searching a 5G network in a full frequency band by a terminal, after searching a 5G SA cell, residing the SA cell by the terminal, initiating registration to the 5G network, and when the registration is successful, residing the 5G network by the terminal, and working in a 5G SA mode; when the registration fails, the 5G core network informs the 5G base station that the terminal registration fails.

Then, after receiving the notification, the 5G base station may send out NSA-supporting 4G frequency point information to the terminal in the first mode or the second mode.

When a first mode, namely a frequency point information scheme of a second network cell is issued after terminal measurement reporting, a 5G base station issues measurement control information, configures all 4G neighbor cell frequency point information (also can further configure 4G neighbor cell frequency points supporting NSA as high priority), and the terminal performs measurement and reports a measurement report; the 5G base station selects a 4G cell which supports NSA and has highest signal strength, and sends the frequency point information of the cell to the terminal while releasing RRC connection. That is, the base station may issue the 4G frequency point information supporting NSA after the terminal measures and reports the frequency point information of the 4G cell, the base station configures all the 4G neighbor frequency points in the measurement control message, and after the terminal reports the measurement report of all the 4G cells, the 5G base station selects a 4G cell supporting NSA and having the strongest signal, and issues the frequency point information of the cell to the terminal while releasing RRC connection.

Here, in the measurement control message issued by the 5G base station, as shown in fig. 6, the 4G neighbor cell (ENDC) frequency point supporting NSA may be configured to be high priority, and the 4G neighbor cell frequency point not supporting NSA is not supported, so that the measurement result of the 4G neighbor cell supporting NSA is preferentially measured and reported.

When the second mode is adopted, that is, when the scheme of directly issuing the frequency point information of the second network neighbor cell is adopted, the 5G base station configures the frequency point information of all 4G neighbor cells (the priority order of the 4G neighbor cells supporting NSA can be further configured) while the RRC connection is released, the terminal obtains the frequency point information of the second network neighbor cell supporting NSA at a designated position in the sequencing result of all the frequency point information based on the configured frequency point information of the 4G neighbor cells to search, and finds the 4G cell supporting NSA and having the highest signal strength, or selects the 4G cell supporting NSA with the high priority when the priority order of the 4G neighbor cells supporting NSA is configured. That is, the 5G base station directly issues the frequency point information of the 4G, and the 5G base station issues the frequency point information of all the 4G neighbor cells while releasing the RRC connection, and after receiving the information, the terminal obtains the frequency point information of the second network neighbor cell supporting NSA based on the designated position in the ordering result of all the frequency point information, preferentially searches the 4G cell supporting NSA, selects the 4G cell residence supporting NSA with the strongest signal, or selects the 4G cell residence supporting NSA with the high priority.

Here, in the RRC connection release signaling, as shown in fig. 7, the base station configures a NSA-supporting 4G neighbor (ENDC) frequency point to be of high priority, and does not support the NSA 4G neighbor frequency point, so that the base station preferentially searches for and selects a NSA-supporting 4G cell of high priority, and camps.

Finally, the terminal resides in the selected 4G cell supporting NSA and initiates registration; after the registration is successful, when the terminal initiates a service, the network configures the dual connection of 4G and 5G, and the terminal works in a 5G NSA mode. The terminal may also take the camped NSA-enabled 4G cell as the highest priority for 4G cell reselection.

As can be seen from the above description, the scheme of the application embodiment of the present invention is a network control-based 5G terminal power-on network selection optimization scheme, after the 5G core network refuses the registration of the terminal, the 5G base station issues the 4G frequency point supporting NSA to the terminal while releasing the RRC connection, and the terminal preferentially accesses the 4G cell supporting NSA according to the frequency point indication. By adopting the scheme of the embodiment of the invention, full-band searching of the 4G can be avoided, the time delay of starting up and selecting the network of the 5G terminal is greatly shortened, the terminal prefers to support the 4G cell residence of NSA, the 5G service can be carried out to improve the user experience, the 5G user and the 4G user are shunted, and the overlarge load of the 4G cell which does not support NSA is avoided.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention further provides a network selecting device, which is disposed on a network device of a first network, as shown in fig. 8, where the device includes:

a determining unit 81, configured to determine that the terminal fails to register in the first network;

a first processing unit 82, configured to issue frequency point information of a second network supporting NSA to the terminal while releasing RRC connection; the issued frequency point information is used for the terminal to access to the second network cell supporting NSA preferentially.

Wherein, in an embodiment, the determining unit 81 is specifically configured to:

In practical application, the first processing unit 82 may implement issuing, to the terminal, frequency point information of the second network supporting NSA in the following two manners:

Based on this, in an embodiment, the first processing unit 82 is further configured to:

The terminal-side measurement may also be a priority-based measurement, in order to reduce latency.

Based on this, in an embodiment, the measurement control message is further used to instruct the terminal to support NSA cells with high priority;

the first processing unit 82 is further configured to preferentially receive a measurement report for a second network neighboring cell supporting NSA, which is reported by the terminal.

Second, the first processing unit 82 directly issues a second network neighboring cell frequency point information scheme

Based on this, in an embodiment, the first processing unit 82 is specifically configured to:

In practical applications, the determining unit 81 and the first processing unit 82 may be implemented by a processor in the network selecting device in combination with a communication interface.

In order to implement the method at the terminal side in the embodiment of the present invention, the embodiment of the present invention further provides a network selecting device, which is disposed on a terminal, as shown in fig. 9, and the device includes:

a receiving unit 91, configured to receive frequency point information of a second network supporting NSA issued by a network device of a first network; the issued frequency point information is used for the terminal to access to a second network cell supporting NSA preferentially;

the second processing unit 92 is configured to access a second network cell supporting NSA according to the issued frequency point information.

correspondingly, when the network device issues frequency point information of the second network supporting NSA to the terminal in the first manner, that is, the terminal measures and reports the frequency point information scheme of the second network cell, the receiving unit 91 is further configured to receive the measurement control message issued by the network device;

the second processing unit 92 is further configured to:

When the first mode is adopted, in order to reduce the time delay, the measurement at the terminal side can also be measurement based on priority, at this time, the measurement control message is further used for indicating that the terminal supports NSA cell to have high priority, and the second processing unit is used for preferentially measuring the second network neighboring cell supporting NSA based on the measurement control message, and reporting the measurement report of the second network neighboring cell supporting NSA.

When the network device issues frequency point information of the second network supporting NSA to the terminal in the second manner, that is, the network device directly issues a second network neighboring frequency point information scheme, the receiving unit 91 is specifically configured to: receiving frequency point information of all second network neighbor cells issued by the network equipment;

the second processing unit 92 is specifically configured to: obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information;

In one embodiment, the second processing unit 92 performs cell search preferentially at the second network cell frequency point supporting NSA; and after the search is completed, selecting a second network cell which supports NSA and has highest signal strength.

In actual application, the issued frequency point information can also contain priority information of at least one second network neighbor cell supporting NSA; the second processing unit 92 selects a second network cell supporting NSA with a high priority and accesses the second network cell.

In practical application, after the second network registration is successful, the second processing unit 92 uses the resident second network cell as the highest priority of the second network cell reselection, so that the cell can be quickly selected later.

Of course, when there are no second network cells supporting NSA, the second processing unit 92 searches all the second network cells, selects the second network cell with the highest signal strength, and accesses the selected second network cell.

It should be noted that, in practical application, the receiving unit 91 may be implemented by a communication interface in the network selecting device; the second processing unit 92 may be implemented by a processor in the network selection device in combination with a communication interface.

It should be noted that: in the network selecting device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the network selecting device and the network selecting method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the network selecting device and the network selecting method are detailed in the method embodiments and are not repeated herein.

Based on the hardware implementation of the program modules, and in order to implement the method at the terminal side in the embodiment of the present invention, the embodiment of the present invention further provides a network device, as shown in fig. 10, where the network device 100 includes:

a first communication interface 101 capable of information interaction with other devices;

the first processor 102 is connected to the first communication interface 101 to implement information interaction with a terminal, and is configured to execute the method provided by one or more technical solutions on the network device side when running a computer program. And the computer program is stored on the first memory 103.

Specifically, the first processor 102 is configured to determine that the terminal fails to register in the first network;

A first communication interface 101, configured to issue frequency point information of a second network supporting NSA to the terminal while releasing RRC connection; the issued frequency point information is used for the terminal to access to the second network cell supporting NSA preferentially.

In one embodiment, the first processor 102 is specifically configured to:

and receiving signaling of the registration failure of the terminal in the first network, which is sent by the core network, through the first communication interface 101.

In an embodiment, the first communication interface 101 is further configured to: issuing a measurement control message to the terminal; the measurement control message is at least used for indicating the terminal to measure all second network neighbor cells; receiving measurement reports of all second network neighbor cells reported by the terminal; the measurement report comprises the frequency point and the signal strength of the second network neighbor cell;

the first processor 102 is configured to select, according to the reported measurement report, a second network neighboring cell that supports NSA and has the highest signal strength;

the first communication interface 101 is configured to send frequency point information of the selected second network neighboring cell to the terminal.

In an embodiment, the measurement control message is further configured to instruct the terminal to support NSA cells with high priority; the first communication interface 101 is further configured to preferentially receive a measurement report for a second network neighboring cell supporting NSA, which is reported by the terminal.

In an embodiment, the first communication interface 101 is configured to send frequency point information of all second network neighbors to the terminal; and supporting the appointed position of the frequency point information of the second network neighbor cell of the NSA in the sequencing result of all the frequency point information.

It should be noted that: the specific processing procedures of the first processor 102 and the first communication interface 101 are detailed in the method embodiment, and are not described herein.

Of course, in actual practice, the various components in network device 100 are coupled together by bus system 104. It is understood that the bus system 104 is used to enable connected communications between these components. The bus system 104 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 104 in fig. 10.

The first memory 103 in the embodiment of the present invention is used to store various types of data to support the operation of the network device 100. Examples of such data include: any computer program for operation on the network device 100.

The method disclosed in the above embodiment of the present invention may be applied to the first processor 102 or implemented by the first processor 102. The first processor 102 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method may be performed by integrated logic circuits of hardware or instructions in software form in the first processor 102. The first processor 102 described above may be a general purpose processor, a digital signal processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The first processor 102 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the first memory 103, said first processor 102 reading information in the first memory 103, in combination with its hardware performing the steps of the method as described above.

In an exemplary embodiment, the network device 100 may be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field-programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components for performing the aforementioned methods.

Based on the hardware implementation of the program modules, and in order to implement the method on the terminal side according to the embodiment of the present invention, as shown in fig. 11, the terminal 110 includes:

a second communication interface 111 capable of information interaction with a network device;

and the second processor 112 is connected with the second communication interface 111 to realize information interaction with the network device, and is used for executing the methods provided by one or more technical schemes on the terminal side when running the computer program. And the computer program is stored on the second memory 113.

Specifically, the second communication interface 111 is configured to receive frequency point information of a second network supporting NSA issued by a network device of the first network; the issued frequency point information is used for the terminal to access to a second network cell supporting NSA preferentially;

A second processor 112, configured to access a second network cell supporting NSA according to the issued frequency point information; the data transmission speed of the first network is higher than the data transmission speed of the second network.

In an embodiment, the second communication interface 111 is further configured to receive a measurement control message issued by the network device; reporting measurement reports of all second network neighbor cells to the network equipment;

the second processor 112 is further configured to measure all second network neighbors based on the issued measurement control message;

the second communication interface 111 is configured to receive frequency point information of a second network neighboring cell that supports NSA and has the highest signal strength and is selected by the network device based on a measurement report;

the second processor 112 is configured to access a second network cell that supports NSA and has a highest signal strength.

In an embodiment, the measurement control message is further used to instruct the terminal to support the NSA cell with a high priority, and the second processor 112 is configured to preferentially measure the second network neighbor cell supporting NSA based on the measurement control message, and report a measurement report of the second network neighbor cell supporting NSA through the second communication interface 111.

In an embodiment, the second communication interface 111 is configured to receive frequency point information of all second network neighboring cells issued by the network device;

the second processor 112 is specifically configured to: obtaining frequency point information of a second network neighbor cell supporting NSA at a designated position in the ordering result of all the frequency point information; and accessing the second network cell supporting NSA according to the obtained frequency point information of the second network neighbor cell supporting NSA.

Wherein, in an embodiment, the second processor 112 performs cell search preferentially at the second network cell frequency point supporting NSA; and after the search is completed, selecting a second network cell which supports NSA and has highest signal strength.

In an embodiment, the issued frequency point information may further include priority information of at least one second network neighbor cell supporting NSA; the second processor 112 selects a second network cell supporting NSA with a high priority and accesses it.

In one embodiment, after the second network registration is successful, the second processor 112 uses the resident second network cell as the highest priority for second network cell reselection to enable subsequent quick cell selection.

In one embodiment, when there are no second network cells supporting NSA, the second processor 112 searches all the second network cells, selects the second network cell with the highest signal strength, and accesses the selected second network cell.

It should be noted that: the specific processing procedures of the second processor 112 and the second communication interface 111 are described in the method embodiment, and are not described herein.

Of course, in actual practice, the various components in terminal 110 are coupled together by bus system 114. It is understood that the bus system 114 is used to enable connected communications between these components. The bus system 114 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 114 in fig. 11.

The second memory 113 in the embodiment of the present invention is used to store various types of data to support the operation of the access terminal 110. Examples of such data include: any computer program for operating on terminal 110.

The method disclosed in the above embodiment of the present invention may be applied to the second processor 112 or implemented by the second processor 112. The second processor 112 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method may be performed by instructions in the form of integrated logic circuits or software in hardware in the second processor 112. The second processor 112 described above may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 112 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the second memory 113, said second processor 112 reading information in the second memory 113, in combination with its hardware performing the steps of the method as described above.

In an exemplary embodiment, the terminal 110 can be implemented by one or more ASIC, DSP, PLD, CPLD, FPGA, general purpose processors, controllers, MCU, microprocessor, or other electronic elements for performing the foregoing methods.

It is to be understood that the memories (the first memory 103, the second memory 113) of the embodiments of the present invention may be volatile memories or nonvolatile memories, and may include both volatile and nonvolatile memories. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory described by embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention further provides a network selection system, as shown in fig. 12, where the system includes: network device 121 and terminal 122; wherein, the liquid crystal display device comprises a liquid crystal display device,

the network device 121 is located in the first network, and is configured to determine that the terminal 122 fails to register in the first network; while releasing the RRC connection, transmitting frequency point information of the NSA-supporting second network to the terminal 122; the issued frequency point information is used for the terminal 122 to access to the second network cell supporting NSA preferentially;

the terminal 122 is configured to receive frequency point information of a second network supporting NSA issued by the network device 121; and accessing a second network cell supporting NSA according to the issued frequency point information.

It should be noted that: the specific processing procedures of the network device 121 and the terminal 122 are described in detail above, and will not be described herein.

In an exemplary embodiment, the present invention further provides a storage medium, i.e. a computer storage medium, in particular a computer readable storage medium, for example comprising a first memory 103 storing a computer program, which is executable by the first processor 102 of the network device 100 to perform the steps of the network device side method described above. For example, the second memory 113 may store a computer program that may be executed by the second processor 112 of the terminal 110 to perform the steps of the terminal-side method described above. The computer readable storage medium may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

It should be noted that: "first," "second," etc. are used to distinguish similar objects and not necessarily to describe a particular order or sequence.

In addition, the embodiments of the present invention may be arbitrarily combined without any collision.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A network selection method, characterized by being applied to a network device of a first network, the method comprising:

determining that the terminal fails to register in a first network;

releasing the Radio Resource Control (RRC) connection and simultaneously transmitting frequency point information of a second network supporting non-independent Networking (NSA) to the terminal; the issued frequency point information is used for the terminal to access to the second network cell which supports NSA and has the highest signal strength preferentially.

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

3. The method according to claim 2, characterized in that the measurement control message is further used to indicate that the terminal supports NSA cells with high priority;

4. The method of claim 1, wherein the issuing frequency point information of the NSA-enabled second network to the terminal includes:

5. The method of claim 4 wherein the issued frequency point information further comprises priority information of at least one second network neighbor supporting NSA.

6. The method of claim 1, wherein determining that the terminal failed registration with the first network comprises:

7. A network selection method, characterized in that it is applied to a terminal, the method comprising:

receiving frequency point information of a second network supporting NSA, which is issued by network equipment of a first network; the issued frequency point information is used for the terminal to access to a second network cell which supports NSA and has highest signal strength preferentially; the frequency point information is issued by the network equipment of the first network when determining that the terminal fails to register in the first network and releasing the Radio Resource Control (RRC) connection;

8. The method of claim 7, wherein the method further comprises:

receiving a measurement control message issued by the network equipment;

9. The method of claim 8, wherein the measurement control message is further used to indicate that the terminal supports NSA cells with high priority;

10. The method of claim 7, wherein receiving the frequency point information of the NSA-enabled second network issued by the network device of the first network includes:

11. The method of claim 10 wherein the issued frequency point information further comprises priority information of at least one second network neighbor cell supporting NSA;

12. The method according to claim 10, wherein the method further comprises:

13. The method of claim 7, wherein the method further comprises:

14. The method of claim 7, wherein the method further comprises:

15. A net selection device, comprising:

the first processing unit is used for transmitting frequency point information of a second network supporting NSA to the terminal while releasing RRC connection; the issued frequency point information is used for the terminal to access to the second network cell which supports NSA and has the highest signal strength preferentially.

16. The apparatus of claim 15, wherein the first processing unit is further configured to:

17. The apparatus according to claim 15, wherein the first processing unit is specifically configured to:

18. A net selection device, comprising:

the receiving unit is used for receiving frequency point information of a second network supporting NSA, which is issued by network equipment of the first network; the issued frequency point information is used for the terminal to access the second network cell which supports NSA and has the highest signal strength preferentially; the frequency point information is issued by the network equipment of the first network when determining that the terminal fails to register in the first network and releasing the Radio Resource Control (RRC) connection;

19. The apparatus of claim 18, wherein the device comprises a plurality of sensors,

the receiving unit is further configured to receive a measurement control message sent by the network device;

the second processing unit is further configured to:

20. The apparatus according to claim 18, wherein the receiving unit is specifically configured to: receiving frequency point information of all second network neighbor cells issued by the network equipment;

21. A network device, comprising:

The first communication interface is used for transmitting frequency point information of a second network supporting NSA to the terminal while releasing RRC connection; the issued frequency point information is used for the terminal to access to the second network cell which supports NSA and has the highest signal strength preferentially.

22. The apparatus of claim 21, wherein the first communication interface is further configured to: issuing a measurement control message to the terminal; the measurement control message is at least used for indicating the terminal to measure all second network neighbor cells; receiving measurement reports of all second network neighbor cells reported by the terminal; the measurement report comprises the frequency point and the signal strength of the second network neighbor cell;

23. The apparatus of claim 21, wherein the first communication interface is configured to send frequency point information of all second network neighbors to the terminal; and supporting the appointed position of the frequency point information of the second network neighbor cell of the NSA in the sequencing result of all the frequency point information.

24. A terminal, comprising:

the second communication interface is used for receiving frequency point information of a second network supporting NSA, which is issued by the network equipment of the first network; the issued frequency point information is used for the terminal to access to a second network cell which supports NSA and has highest signal strength preferentially; the frequency point information is issued by the network equipment of the first network when determining that the terminal fails to register in the first network and releasing the Radio Resource Control (RRC) connection;

25. The terminal of claim 24, wherein the second communication interface is further configured to receive a measurement control message issued by the network device; reporting measurement reports of all second network neighbor cells to the network equipment;

26. The terminal according to claim 24, wherein the second communication interface is configured to receive frequency point information of all second network neighbors issued by the network device;

27. A network device, comprising: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is adapted to perform the steps of the method of any of claims 1 to 6 when the computer program is run.

28. A terminal, comprising: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is adapted to perform the steps of the method of any of claims 7 to 14 when the computer program is run.

29. A storage medium having stored thereon a computer program, which when executed by a processor, performs the steps of the method of any of claims 1 to 6 or the steps of the method of any of claims 7 to 14.