CN114071593A

CN114071593A - Method, system, electronic device and storage medium for returning after network fallback

Info

Publication number: CN114071593A
Application number: CN202010761558.7A
Authority: CN
Inventors: 范伟; 金逸; 王国锐; 韩巍
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-02-18

Abstract

The invention provides a method, a system, electronic equipment and a storage medium for returning after network fallback, wherein the method comprises the following steps: after the user equipment falls back to the 3G network from the 5G network to finish the target service; detecting whether the user equipment records initial position information, wherein the initial position information at least comprises 5G service cell information and 5G neighbor cell information corresponding to the user equipment before the network fallback; when the initial position information is recorded by the user equipment, acquiring the current position information of the user equipment, wherein the current position information at least comprises 5G adjacent area information corresponding to the current user equipment; comparing the current position information with the initial position information; when the comparison result meets a preset condition, searching at least a 5G service cell and a 5G adjacent cell in the initial position information, and measuring the searched cells; and determining a target cell according to the measurement result, and actively residing the user equipment in the target cell. The invention can realize the rapid return of the user equipment after the user equipment falls back to the 3G network from the 5G network.

Description

Method, system, electronic device and storage medium for returning after network fallback

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a system, an electronic device, and a storage medium for returning after a network fallback.

Background

The 3GPP (Third Generation Partnership Project) introduced SRVCC (Single Radio Voice Call Continuity) handover technology in Release16 protocol, which is used to smoothly handover Voice traffic in Packet Switch (PS) domain under 5G NR (New Radio, New air interface) to Voice traffic in Circuit Switch domain CS (Circuit Switched, CS) of 3G WCDMA (Wideband Code Division Multiple Access) network. The 3G network may also continue to fall back to the 2G GSM (Global System for Mobile Communications) network.

As is known, the data rate of the 5G NR network is higher than that of the 3G/2G network by several orders of magnitude, so that in order to improve the User experience, after the voice service is finished, the UE (User Equipment) should return to the 5G network as soon as possible. Currently, the 3GPP SA2 decides not to make a standard for the terminal implementation for how to support a fast return from 3G/2G to 5G (explicitly specified in TS 23.216).

In order to enable the UE to quickly return to the 5G NR network after falling back from the 5G NR network to the 3G WCDMA/2G GSM network, most of the existing schemes need to revise the standard, which is obviously contrary to the currently passing standard, and some other schemes need to passively listen to the network arrangement and cannot quickly return to the 5G network, thereby affecting the user experience.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a method, a system, an electronic device, and a storage medium for returning after a network fallback, so as to implement a fast return after a user equipment falls back from a 5G network to a 3G network, thereby ensuring that a user uses a high data rate network to the maximum extent and improving user experience.

In order to achieve the above object, the present invention provides a method for returning after network fallback, comprising:

when the user equipment falls back to the 3G network from the 5G network and the target service is completed through the 3G/2G network;

detecting whether the user equipment records initial position information, wherein the initial position information at least comprises 5G service cell information and 5G adjacent cell information corresponding to the user equipment before the network falls back;

when the initial position information is recorded by the user equipment, acquiring the current position information of the user equipment, wherein the current position information at least comprises 5G adjacent area information corresponding to the current user equipment;

comparing the current position information of the user equipment with the initial position information;

when the comparison result meets a preset condition, searching at least a 5G service cell and a 5G adjacent cell in the initial position information, and measuring the searched cells;

and determining a target cell according to the measurement result, and actively residing the user equipment in the target cell.

In a preferred embodiment of the present invention, the initial position information further includes: the network falls back the 4G adjacent cell information corresponding to the user equipment;

the step of searching at least the 5G serving cell and the 5G neighboring cell in the initial location information includes: and searching for the 5G service cell, the 5G neighbor cell and the 4G neighbor cell in the initial position information.

In a preferred embodiment of the present invention, the initial position information further includes: the 3G/2G service cell to which the user equipment initially falls back, GPS information of the user equipment before the fall back, WLAN access point information of the user equipment before the fall back, and/or Bluetooth access point information of the user equipment before the fall back;

the current location information further includes: the current 3G/2G service cell corresponding to the user equipment, the current GPS information of the user equipment, the current WLAN access point information of the user equipment and/or the current Bluetooth access point information of the user equipment.

In a preferred embodiment of the present invention, when the user equipment does not record the initial location information, or the step of searching for at least the 5G serving cell and the 5G neighboring cell in the initial location information fails, the method further includes:

reading a system message broadcasted by a 3G/2G service cell corresponding to the user equipment at present;

detecting whether the system message contains 4G neighbor cell information, if so, selecting at least one target 4G neighbor cell according to the contained 4G neighbor cell information;

judging whether the at least one target 4G neighboring cell is configured with a corresponding 5G neighboring cell, if so, acquiring the absolute priority of each configured 5G neighboring cell;

and actively residing the user equipment to a 5G adjacent region with the highest absolute priority.

In a preferred embodiment of the present invention, the step of selecting at least one target 4G neighboring cell according to the included 4G neighboring cell information includes:

respectively measuring each 4G adjacent cell to obtain a measurement result of each 4G adjacent cell;

and determining at least one target 4G adjacent cell according to the measurement result of each 4G adjacent cell.

In a preferred embodiment of the present invention, the step of determining at least one target 4G neighboring cell according to the measurement result of each 4G neighboring cell is implemented by any one of the following manners:

determining the 4G adjacent regions with the best former N measurement results as the target 4G adjacent regions, wherein N is more than or equal to 1;

determining a 4G neighboring cell of which the measurement result exceeds a preset threshold value as the target 4G neighboring cell;

and determining the 4G adjacent cell which belongs to the first N best measuring results and the measuring result of which exceeds a preset threshold value as the target 4G adjacent cell.

In a preferred embodiment of the present invention, when the system message does not include 4G neighbor cell information, or the at least one target 4G neighbor cell is not configured with a corresponding 5G neighbor cell, the method further includes;

detecting whether the user equipment has a suspended data service, and if so, judging whether the suspended data service can continue to operate only by needing a 5G core network;

when the suspended data service can continue to run without the 5G core network, any one of the following return operations is executed:

executing redirection return 4G network operation;

4G network operation of quick return is executed;

performing a 5G network search returns a 5G network operation.

In a preferred embodiment of the present invention, when the suspended data traffic requires a 5G network to continue to operate, before the returning operation is performed, the method further includes:

and detecting whether a 4G adjacent cell accessed to a 5G core network exists in the 4G adjacent cell of the user terminal, if so, actively residing the user equipment to the 4G adjacent cell accessed to the 5G core network, ending the process, and if not, executing the returning operation.

In a preferred embodiment of the present invention, the step of determining whether the suspended data service requires a 5G core network to continue to operate includes determining whether a PDU session corresponding to the suspended data service satisfies any one of the following conditions:

the user plane of the PDU session corresponding to the suspended data service needs integrity protection;

the PDU session corresponding to the suspended data service is of an Ethernet type;

the PDU session corresponding to the suspended data service is of an unstructured data type;

a QoS Flow with a resource type of Delay critical GBR exists in a PDU session corresponding to the suspended data service;

a QoS Flow with the resource type of GBR exists in the PDU session corresponding to the suspended data service, and the time delay of a data packet of the QoS Flow is less than the preset time delay;

a QoS Flow with the resource type of GBR exists in the PDU session corresponding to the suspended data service, and the guaranteed Flow bit rate or the maximum Flow bit rate of the QoS Flow is greater than the preset maximum rate;

when the PDU session corresponding to the suspended data service meets any one of the above conditions, the suspended data service is judged to need the 5G core network to continue to operate, otherwise, the suspended data service is judged to continue to operate without the 5G core network.

In a preferred embodiment of the present invention, after the target service is completed, detecting whether there is still an ongoing data service in the user equipment;

when the data service in progress does not exist, the user equipment is enabled to enter an idle state;

when detecting that the data service in progress exists, judging whether the data service in progress can be interrupted, if so, enabling the user equipment to actively enter a non-Cell-DCH state, and if not, enabling the user equipment to actively switch to a 4G network.

In order to achieve the above object, the present invention provides a system for returning after a network fallback, comprising:

an initial position detection module, configured to detect whether initial position information is recorded in a user equipment after the user equipment falls back from a 5G network to a 3G network and a target service is completed through the 3G/2G network, where the initial position information at least includes 5G service cell information and 5G neighbor cell information corresponding to the user equipment before the network falls back;

a current position obtaining module, configured to obtain current position information of the user equipment when the initial position information is recorded in the user equipment, where the current position information at least includes 5G neighbor cell information corresponding to the current user equipment;

a comparison module, configured to compare the current location information of the user equipment with the initial location information;

a cell search module, configured to search at least a 5G serving cell and a 5G neighboring cell in the initial location information when the comparison result meets a predetermined condition;

a cell measurement module for measuring the searched cell;

a target cell determining module, configured to determine a target cell according to a measurement result of the searched cell;

a first camping module, configured to camp the ue to the target cell actively.

the cell search module is specifically configured to: and searching the 5G service cell, the 5G adjacent cell and the 4G adjacent cell in the initial position information.

In a preferred embodiment of the present invention, the system further comprises:

a system message reading module, configured to read a system message broadcasted by a 3G/2G serving cell currently corresponding to the user equipment when the user equipment does not record initial location information or the cell searching module does not search any cell;

the 4G neighbor cell detection module is used for detecting whether the system message contains 4G neighbor cell information or not;

the target 4G neighbor cell determining module is used for selecting at least one target 4G neighbor cell according to the contained 4G neighbor cell information when the system message contains the 4G neighbor cell information;

a 5G neighbor cell configuration detection module, configured to detect whether the at least one target 4G neighbor cell is configured with a corresponding 5G neighbor cell;

a priority obtaining module, configured to obtain an absolute priority of each 5G neighboring cell when the system message includes 4G neighboring cell information;

and the second residence module is used for actively residing the user equipment to a 5G adjacent cell with the highest absolute priority.

In a preferred embodiment of the present invention, the target 4G neighboring cell determining module includes:

the measuring unit is used for respectively measuring each 4G adjacent cell to obtain the measuring result of each 4G adjacent cell;

and the determining unit is used for determining at least one target 4G neighbor area according to the measurement result of each 4G neighbor area.

In a preferred embodiment of the present invention, the determining unit is implemented by any one of the following ways:

a suspended service detection module, configured to detect whether there is a suspended data service in the user equipment when the 4G neighbor detection module detects that the system message does not include 4G neighbor information or the 5G neighbor configuration detection module detects that the at least one target 4G neighbor is not configured with a corresponding 5G neighbor;

a network requirement judging module, configured to judge whether a suspended data service needs a 5G core network to continue to operate when the user equipment has the suspended data service;

a passive return module, configured to, when the suspended data service can continue to run without a 5G core network, perform any one of the following return operations:

executing redirection return 4G network operation;

4G network operation of quick return is executed;

performing a 5G network search returns a 5G network operation.

a reselection module, configured to detect whether a 4G neighboring cell that has been accessed to a 5G core network exists in the 4G neighboring cells of the user terminal before the passive return module operates when the suspended data service requires the 5G network to continue to operate, and if so, actively camp the user equipment on the 4G neighboring cell that has been accessed to the 5G core network, and if not, invoke the passive return module.

In a preferred embodiment of the present invention, the network requirement determining module is specifically configured to determine whether a PDU session corresponding to the suspended data service meets any one of the following conditions:

the service detection module is used for detecting whether the data service in progress still exists in the user equipment after the target service is finished;

an idle module, configured to enable a user equipment to enter an idle state when there is no ongoing data service in the user equipment;

an interruptible judging module, configured to judge whether an ongoing data service is interruptible or not when the ongoing data service exists in a user equipment;

a state switching module, configured to enable the user equipment to actively enter a non-Cell-DCH state when the ongoing data service can be interrupted;

and the network switching module is used for actively switching the user equipment to the 4G network when the ongoing data service can not be interrupted.

In order to achieve the above object, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the foregoing method when executing the computer program.

In order to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the aforementioned method.

By adopting the technical scheme, the invention has the following beneficial effects:

after the user equipment falls back to the 3G network from the 5G network to finish the target service, if the initial position information is recorded in the user equipment, the user equipment can quickly return to the 5G network by using the information of the 5G service cell and the 5G adjacent cell in the recorded initial position, thereby ensuring that the user can use the high-data-rate network to the maximum extent. In addition, the invention comprehensively considers the current service condition of the user equipment and provides a corresponding solution, thereby improving the user experience.

Drawings

Fig. 1 is a flowchart of a method for returning after network fallback in embodiment 1 of the present invention;

fig. 2 is a flowchart of a method for returning after network fallback in embodiment 2 of the present invention;

fig. 3 is a flowchart of a method for returning after network fallback according to embodiment 3 of the present invention;

fig. 4 is a block diagram of a system returned after the network fallback in embodiment 4 of the present invention;

fig. 5 is a block diagram of a system returned after the network fallback in embodiment 5 of the present invention;

fig. 6 is a block diagram of a system returned after a network fallback in embodiment 6 of the present invention;

fig. 7 is a hardware architecture diagram of an electronic device according to embodiment 7 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Example 1

The present embodiment provides a method for returning after network fallback, as shown in fig. 1, the method includes the following steps:

s0, the user equipment falls back from the 5G network to the 3G network and performs the target service through the 3G/2G network (the 3G network may fall back to the 2G network again).

In this embodiment, the 2G/3G network shall be interpreted as an extension, and includes a 2G communication system, a 2.5G communication system, a 2.75G communication system, a 3G communication system, a 3.5G communication system, a 3.75G communication system, and the like.

The user equipment may fall back from the 5G network to the 3G network according to the SRVCC handover technology, for example, to complete a target service, which generally refers to a circuit domain service, such as a voice service. Of course, the service to be performed by the user equipment falling back from the 5G network to the 3G network is not limited to the circuit domain service, and may also be a packet domain service, and it should not be limited too much here. In addition, besides the SRVCC handover, the network handover may be performed in other possible manners based on the user's requirement or other various possible application scenarios, which is not limited in this disclosure.

S11, after the target service is completed, detecting whether there is still data service in progress in the user equipment.

In this embodiment, the completion of the target service may be initiated by the user equipment, may be initiated by the network side, and may also be caused by a radio link failure or other factors that suddenly occur during the service. For example, voice traffic may cause a link to break due to the user equipment hanging up, due to the other party to the call hanging up, due to a rejection of the request, or suddenly entering an elevator without signal coverage.

S12, when there is no data traffic in progress in the user equipment, the user equipment is caused to enter an idle state.

In this embodiment, the process of entering the user equipment into the idle state may be performed in various manners according to the prior art, and no limitation should be made herein.

S13, detecting whether the ue records initial location information, where the initial location information at least includes related information of a 5G serving cell and a 5G neighboring cell corresponding to the ue before the network fallback.

Preferably, the initial position information may further include: the related information of the 4G adjacent cell corresponding to the user equipment before the network fallback, the related information of the 3G/2G service cell to which the user equipment initially falls, and the GPS of the user equipment before the fallback(Global Positioning System)Information, WLAN of the user equipment before fallback(Wireless Local Area Network, Wireless LAN)Access point information, and/or bluetooth access point information of the user equipment before fallback.

S14, when the initial location information is recorded in the ue, obtaining current location information of the ue, where the current location information at least includes relevant information of a 5G neighboring cell corresponding to the current ue.

Corresponding to the initial location information, the current location information may preferably further include: the current information of the 4G adjacent cell corresponding to the user equipment, the current information of the 3G/2G service cell corresponding to the user equipment, the current GPS information of the user equipment, the current WLAN access point information of the user equipment and/or the current Bluetooth access point information of the user equipment.

S15, comparing the current position information of the user equipment with the initial position information recorded by the user equipment, judging whether the comparison result meets the preset condition, and executing the step S16 when the comparison result meets the preset condition.

In this embodiment, the predetermined condition may be, for example, any one or a combination of the following conditions:

(1) the 5G neighbor cell information in the current position information is consistent with the 5G service cell and the 5G neighbor cell information in the initial position information;

(2) the 4G neighbor cell information in the current position information is consistent with the 4G neighbor cell information in the initial position information;

(3) the 3G/2G service cell information in the current position information is consistent with the 3G/2G service cell information in the initial position information;

(4) the distance between the GPS information in the current position information and the GPS information in the initial position information is within a preset range;

(5) the WLAN access point information in the current position information is consistent with the WLAN access point information in the initial position information;

(6) the bluetooth access point information in the current location information is consistent with the bluetooth access point information in the initial location information.

The predetermined condition represents a moving distance of the user equipment during the operation of the network object service. It should be noted that the above predetermined conditions are only used for illustration, and the present embodiment may be added or modified according to actual needs.

S16, when the comparison result satisfies a predetermined condition, at least searching the 5G serving cell and the 5G neighboring cell in the initial location information.

Preferably, when the initial location information further includes a 4G neighbor cell corresponding to the user equipment before the network falls back, this step includes searching for a 5G serving cell, a 5G neighbor cell, and a 4G neighbor cell in the initial location information.

S17, when the corresponding cell is searched in step S16, the searched cell is measured to measure the signal strength of each cell.

S18, according to the searched measuring result of each cell, determining a target cell, and actively residing the user equipment in the target cell.

In this embodiment, the cell with the best measurement result is preferably used as the target cell for the user equipment to camp on actively. The active park procedure is a technique known in the art and will not be described further herein.

It can be seen that, in this embodiment, after the user equipment falls back from the 5G network to the 3G network to complete the target service, if the user equipment records the initial location information, the 5G serving cell and the 5G neighboring cell information in the initial location recorded by the user can be used to quickly return to the 5G network, so that the user can be ensured to use the high data rate network to the maximum extent, and the user experience is improved.

Example 2

As shown in fig. 2, when step S13 of embodiment 1 does not detect initial location information recorded by the user equipment (because the user equipment does not support recording location information, or the recorded location information has been deleted or invalidated, etc.), or step S16 fails to perform a step of searching at least a 5G serving cell and a 5G neighboring cell in the initial location information (i.e., does not search any cell), this embodiment further includes the following steps on the basis of embodiment 1 (the same partial steps as those of embodiment 1 are omitted in fig. 2):

s21, reading the system message broadcasted by the 3G/2G service cell corresponding to the user equipment currently.

S22, detecting whether the system message contains 4G neighbor information, if yes, executing step S23, and if not, executing step S27.

It should be understood that the 3G/2G system message includes inter-system neighbor cell information, and whether the inter-system neighbor cell information includes 4G neighbor cell information may be determined according to the inter-system neighbor cell information.

S23, when the system message includes a 4G neighbor cell, selecting at least one target 4G neighbor cell from the included 4G neighbor cells. Specifically, each 4G neighboring cell included in the target 4G neighboring cell is measured to obtain a measurement result of each 4G neighboring cell, and then at least one target 4G neighboring cell is determined according to the measurement result of each 4G neighboring cell.

In this embodiment, the target 4G neighborhood may be selected by any one of several ways:

(1) determining the 4G adjacent regions with the best first N measurement results (such as the best signals) as the target 4G adjacent regions, wherein N is more than or equal to 1;

(2) determining a 4G neighboring cell of which the measurement result exceeds a preset threshold value as the target 4G neighboring cell;

(3) and combining the former two modes, namely determining the 4G adjacent cell which belongs to the first N best measurement results and has the measurement result exceeding a preset threshold value as the target 4G adjacent cell.

And S24, judging whether the at least one target 4G adjacent cell is configured with a corresponding 5G adjacent cell, if so, executing a step S25, and if not, executing a step S27.

In the present embodiment, the identification can be performedSystemInformationBlockType1 of target 4G neighborhood (C)Is a system System information Block 1, for shortSIB1Reference to LTE RRC protocol) Whether the system information blocktype24 exists in the system information blocktype24 or not is judged to identify whether the neighbor configuration related to the 5G NR exists.

S25, when the at least one target 4G neighboring cell is configured with a corresponding 5G neighboring cell, acquiring an absolute priority of each configured 5G neighboring cell. Specifically, the deployment condition of the surrounding 5G neighbor cells and the absolute priority of each 5G neighbor cell may be obtained according to the systemlnformationblocktype 24 message block.

And S26, the user equipment is actively resided to a 5G adjacent cell with the highest absolute priority.

S27, detecting whether there is a suspended data service in the ue, if so, determining whether the suspended data service needs a 5G core network to continue to operate, if so, performing step S28, and if not, performing step S29.

In this embodiment, the step of determining whether the suspended data service needs to be continued to operate in the 5G core network includes determining whether a PDU (protocol data unit) Session corresponding to the suspended data service satisfies any one of the following conditions(reference may be made to 3GPP TS for PDU sessions 38.415version 15.1.0Release 15)：

(1) The user plane of the PDU conversation corresponding to the target service starts integrity protection and does not receive the indication of an application layer An instruction to ensure that the user plane of the PDU session does not enforce integrity protection (i.e., the user plane of the PDU session must use Integrity protection).

(2) The PDU Session Type (PDU Session Type) corresponding to the target service is Ethernet (Ethernet) Type (b).

(3) And the PDU session type corresponding to the target service is an Unstructured data (Unstructured) type.

(4) The above-mentionedQoSFlow with resource type of Delay critical GBR in PDU session corresponding to target service (quality of service flow).Wherein the content of the first and second substances,there are at least three types of QoS (qualities) in a communication system according to the 3GPP standard TS23.501 section 5.7.3 Volume services) resource type, guaranteed rate (GBR) type, Non-guaranteed rate (Non-GBR) type, and latency critical guarantees, respectively Rate (delay critical GBR) type.

(5) The PDU conversation corresponding to the target service has QoS Flow with the resource type of GBR, and the QoS Flow When the Packet Delay (Packet Delay Budget) is smaller than a preset Delay (e.g. 200 ms). Wherein the predetermined time delay is generally Setting the minimum time delay supported by the 3G network, and when the time delay of the data packet of QoSFlow is less than the preset time delay, the 3G network does not use the preset time delay And (4) supporting.

(6) The PDU session corresponding to the target service has QoS Flow with a resource type of GBR, and a Guaranteed Flow Bit Rate (one for Guaranteed Flow Bit Rate, GFBR, uplink and downlink) or a Maximum Flow Bit Rate (one for Maximum Flow Bit Rate, MFBR, uplink and downlink) of the QoS Flow is greater than a preset Maximum Rate (one for uplink and downlink). The preset maximum rate is set as the maximum rate supported by the 3G network, and when the preset maximum rate is greater than the maximum rate, the 3G network does not support.

S28, detecting whether there is a 4G neighboring cell that can be accessed and has been accessed to the 5G core network in the 4G neighboring cells of the user equipment, if so, executing step S29, and if not, executing step S210.

In this embodiment, whether the 4G neighboring cell can be accessed and has already accessed the 5G core mesh may be determined according to PLMN information of the 4G neighboring cell, and a specific determination process is the prior art and is not described in detail herein.

S29, the ue is actively camped to the 4G neighbor area that has accessed the 5G core network, and the process is ended.

S210, executing any one of the following return operations: executing redirection return 4G network operation; 4G network operation of quick return is executed; performing a 5G network search returns a 5G network operation. The above-mentioned return operation is a network return operation process common in the art, and is not described in detail herein.

According to the embodiment, the 5G network can be searched according to the 5G NR neighbor cell information in the 4G neighbor cell system message of the 3G service cell, which is actively received by the user equipment, so that the 5G network can be quickly returned, and the user experience is improved. In addition, when the user equipment has the suspended data service and the suspended data service needs the 5G core network to continue to operate, the user equipment is preferentially resided in the 4G adjacent region which is accessed to the 5G core network, which is beneficial to the suspended data service to continue to operate and ensures the user experience.

Example 3

As shown in fig. 3, when step S11 of embodiment 1 detects that there is an ongoing data service after the target service is completed, the method of this embodiment further includes the following steps on the basis of embodiment 1 or 2 (the same partial steps as those of embodiment 1 or 2 are omitted in fig. 3):

and S31, judging whether the ongoing data service can be interrupted, if so, enabling the user equipment to actively enter a non-Cell-DCH state, and if not, enabling the user equipment to actively switch to a 4G network.

In the existing protocol, the states of the UE are divided into four types: CELL _ DCH state, CELL _ FACH state, CELL _ PCH state State, URA _ PCH state. These states define the physical channel classes used by the UE, the measurement and mobility management tasks, and the operation at the time of state transition. Wherein, in CELL _ DCH state, the system will allocate the special channel to the UE for large flow number Transmitting; when the activity of the UE is reduced and the amount of transmitted data is obviously reduced, the system can convert the state of the UE into CELL \ u FACH-likeState. In CELL _ FACH state, UE can only use common channel to communicate with system, and uplink uses RACH (random access channel) Channel), the downlink uses FACH (forward access channel), and this state is suitable for a small amount of data transmission. If the activity of the UE When lowering again, the system can change the state of the UE to CELL _ PCH, in which case the UE can only monitor the paging channel, not the paging channel Any data transfer can be performed. The lowest activity state is the URA _ PCH state, in which the UE can only listen to paging And calling the channel. In this embodiment, when the ongoing data service can be interrupted, the UE is turned to a non-CELL _ DCH state, i.e. CELL \ u FACH state or CELL _ PCH state or URA _ PCH state.

In step, the user equipment may, for example, actively go through Fast Domancy(fast dormancy)Providing a report of Signalling Connection Release Indication(Signal connection Release indication)The mechanism of the message enters a non-Cell-DCH state; and actively reporting the measurement report by actively revising the measurement report threshold value, conditions and the like to trigger the network to switch the terminal to the 4G network.

In this embodiment, whether the ongoing data service can be interrupted is determined by the following steps: judging whether the SSC (service and session continuity) mode of the PDU session of the ongoing data service is 2, if so, the interruption can be performed, if so, further judging according to the service type is needed, for example, the interruption can not be performed if the interactive audio and video is available, and the interruption can be performed if the downloading-type service has a breakpoint resume function. For SSC patterns, reference may be made to standard TS23.501, section 5.6.9.

The embodiment is beneficial to the continuous operation of the ongoing data service and ensures the user experience.

Example 4

As shown in fig. 4, the system 1 includes a service detection module 101, an idle module 102, an initial position detection module 103, a current position acquisition module 104, a comparison module 105, a cell search module 106, a cell measurement module 107, a target cell determination module 108, and a first residence module 109. The following is a detailed description of each module, respectively:

a service detection module 101, configured to detect whether there is still an ongoing data service in the user equipment after the user equipment falls back from the 5G network to the 3G network and completes the target service through the 3G/2G network.

In this embodiment, the completion of the target service may be initiated by the user equipment, may also be initiated by the network side, and may also be caused by a radio link failure or other factors that suddenly occur during the service. For example, voice traffic may cause a link to be broken due to the user equipment hanging up, due to the call being dropped by the party to the call, due to a rejection of the request, or due to a sudden entry into the elevator without signal coverage.

An idle module 102, configured to enable a user equipment to enter an idle state when there is no ongoing data service in the user equipment.

An initial location detecting module 103, configured to detect whether the ue records initial location information, where the initial location information at least includes related information of a 5G serving cell and a 5G neighboring cell corresponding to the ue before the network fallback.

Preferably, the initial position information may further include: the method comprises the steps of obtaining relevant information of a 4G adjacent cell corresponding to the user equipment before network fallback, relevant information of a 3G/2G service cell to which the user equipment initially falls back, GPS information of the user equipment before fallback, WLAN access point information of the user equipment before fallback, and/or Bluetooth access point information of the user equipment before fallback.

A current location obtaining module 104, configured to obtain current location information of the user equipment when the initial location information is recorded in the user equipment, where the current location information at least includes relevant information of a 5G neighboring cell corresponding to the current user equipment.

The comparison module 105 compares the current location information of the user equipment with the initial location information, and determines whether a comparison result meets a predetermined condition.

The predetermined condition indicates that the moving distance of the user equipment is small during the operation of the network target service. It should be noted that the predetermined conditions are only used for illustration, and the embodiment may be added or modified according to actual needs.

And the cell searching module 106 is configured to search at least a 5G serving cell and a 5G neighboring cell in the initial location information when the comparison result meets a predetermined condition.

Preferably, when the initial location information further includes a 4G neighbor cell corresponding to the user equipment before the network falls back, this module searches for a 5G serving cell, a 5G neighbor cell, and a 4G neighbor cell in the initial location information.

A cell measurement module 107, configured to measure the searched cells when the cell search module 106 searches for the corresponding cell, so as to measure the signal strength of each cell.

And a target cell determining module 108, configured to determine a target cell according to the searched measurement result of each cell.

A first camping module 109, configured to camp the ue to the target cell actively.

It can be seen that, in this embodiment, after the user equipment falls back from the 5G network to the 3G network and completes the target service, if the user equipment records the initial location information, the 5G serving cell and the 5G neighboring cell information in the initial location recorded by the user can be used to quickly return to the 5G network, so that the user can be ensured to use the high data rate network to the maximum extent, and the user experience is improved.

Example 5

As shown in fig. 5, in this embodiment, the following modules are added to embodiment 4 (each module in embodiment 4 is omitted in fig. 5):

a system message reading module 201, configured to read a system message broadcasted by a 3G/2G serving cell currently corresponding to the user equipment when the initial position detecting module 103 does not detect initial position information recorded by the user equipment (because the user equipment does not support recording position information, or the recorded position information is deleted or invalidated, etc.), or when the cell searching module 106 does not search any relevant cell.

The 4G neighbor detection module 202 detects whether the system message includes 4G neighbor information.

It should be understood that the 3G/2G system message includes inter-system neighbor cell information, and whether the inter-system neighbor cell information is included can be determined according to the inter-system neighbor cell information.

A target 4G neighboring cell determining module 203, configured to select at least one target 4G neighboring cell from the included 4G neighboring cells when the system message includes the 4G neighboring cells.

In this embodiment, the target 4G neighboring cell determining module 203 specifically includes: the measuring unit is used for respectively measuring each 4G adjacent cell to obtain the measuring result of each 4G adjacent cell; and the determining unit is used for determining at least one target 4G adjacent cell according to the measurement result of each 4G adjacent cell.

In this embodiment, the determining unit may be implemented by any one of the following manners:

A 5G neighboring cell configuration detecting module 204, configured to detect whether the at least one target 4G neighboring cell is configured with a corresponding 5G neighboring cell.

In this embodiment, whether the neighbor configuration related to the 5G NR exists can be identified by identifying whether the systemlnformationblocktype 1(SIB 1) message block of the target 4G neighbor has the systemlnformationblocktype 24 message block.

A priority obtaining module 205, configured to obtain an absolute priority of each configured 5G neighboring cell when the at least one target 4G neighboring cell is configured with a corresponding 5G neighboring cell. Specifically, the deployment condition of the surrounding 5G neighbor cells and the absolute priority of each 5G neighbor cell may be obtained according to the systemlnformationblocktype 24 message block.

A second camping module 206, configured to camp the ue to the 5G neighboring cell with the highest absolute priority actively. It should be understood that the active park procedure of the present embodiment can be performed in various manners according to the prior art, and should not be unduly limited herein.

A suspended service detection module 207, configured to detect whether there is a suspended data service in the user equipment when the 4G neighbor detection module detects that the system message does not include 4G neighbor information or the 5G neighbor configuration detection module detects that the at least one target 4G neighbor is not configured with a corresponding 5G neighbor.

A network requirement determining module 208, configured to determine, when there is a suspended data service in the user equipment, whether the suspended data service needs a 5G core network to continue to operate. Specifically, the module is configured to determine whether a PDU (protocol data unit) session corresponding to the suspended data service satisfies any one of the following conditions:

A reselection module 209, configured to detect, when the suspended data service requires a 5G network to continue to operate, whether a 4G neighboring cell that can be accessed and has already been accessed to a 5G core network exists in the 4G neighboring cells of the user terminal, and if the 4G neighboring cell exists, actively camp the user equipment on the 4G neighboring cell that has already been accessed to the 5G core network.

A passive returning module 210, configured to, when the suspended data service can continue to run without a 5G core network, or when a 4G neighboring cell that can be accessed and has been accessed to the 5G core network does not exist in the 4G neighboring cell of the user terminal, perform any one of the following returning operations: performing redirection return 4G network operation; 4G network operation of quick return is executed; performing a 5G network search returns a 5G network operation. The above-mentioned return operation is a network return operation process common in the art, and is not described in detail herein.

Example 6

As shown in fig. 6, the present embodiment adds the following modules on the basis of embodiment 4 or 5: (in FIG. 5, each module in embodiment 4 or 5 is omitted.)

An interruptible determining module 301, configured to determine whether an ongoing data service is interruptible or not when the service detecting module 101 does not detect that the ongoing data service exists.

A state switching module 302, configured to enable the user equipment to actively enter a non-Cell-DCH state when the ongoing data service may be interrupted, and then invoke the initial position detecting module 103.

A network switching module 303, configured to, when the ongoing data service cannot be interrupted, actively switch the ue to the 4G network, and then invoke the initial location detecting module 103.

In step, the state switching module 302 may, for example, actively make the user equipment enter the non-Cell-DCH state through a mechanism provided by Fast management to report a signaling Connection Release Indication message; the network switching module 303 may actively report the measurement report by actively revising the measurement report threshold and conditions, etc. to trigger the network switching terminal of the ue to switch to the 4G network.

The embodiment is beneficial to continuously executing the data service in progress and ensures the user experience.

Example 7

The present embodiment provides an electronic device, which may be represented in the form of a computing device (for example, may be a server device), including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor executes the computer program to implement the method for returning after network fallback provided in embodiment 1, 2, or 3.

Fig. 7 shows a schematic diagram of a hardware structure of the present embodiment, and as shown in fig. 7, the electronic device 9 specifically includes:

at least one processor 91, at least one memory 92, and a bus 93 for connecting the various system components (including the processor 91 and the memory 92), wherein:

the bus 93 includes a data bus, an address bus, and a control bus.

Memory 92 includes volatile memory, such as Random Access Memory (RAM)921 and/or cache memory 922, and can further include Read Only Memory (ROM) 923.

Memory 92 also includes a program/utility 925 having a set (at least one) of program modules 924, such program modules 924 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, and in some combination, may include an implementation of a network environment.

The processor 91 executes various functional applications and data processing, such as the method of network fallback provided by embodiments 1, 2 or 3 of the present invention, by running the computer program stored in the memory 92.

The electronic device 9 may further communicate with one or more external devices 94 (e.g., a keyboard, a pointing device, etc.). Such communication may be through an input/output (I/O) interface 95. Also, the electronic device 9 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 96. The network adapter 96 communicates with other modules of the electronic device 9 via the bus 93. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 9, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, among others.

It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module, according to embodiments of the present application. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.

Example 8

The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the steps of the method of returning after network fallback provided in embodiments 1, 2 or 3.

More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.

In a possible implementation, the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps of a method for carrying out the return after network fallback described in embodiments 1, 2 or 3, when said program product is run on said terminal device.

Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of illustration only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A method for returning after a network fallback, comprising:

after the user equipment falls back to the 3G network from the 5G network to finish the target service;

2. The method of claim 1, wherein the initial location information further comprises: 4G neighbor cell information corresponding to the user equipment before network fallback;

the step of searching at least the 5G serving cell and the 5G neighboring cell in the initial location information includes: and searching the 5G service cell, the 5G adjacent cell and the 4G adjacent cell in the initial position information.

3. The method of claim 1, wherein the initial location information further comprises: the 3G/2G service cell to which the user equipment initially falls back, GPS information of the user equipment before the fall back, WLAN access point information of the user equipment before the fall back, and/or Bluetooth access point information of the user equipment before the fall back;

4. The method according to claim 1, wherein when the ue fails to record the initial location information or the searching at least the 5G serving cell and the 5G neighbor cell in the initial location information, the method further comprises:

5. The method of claim 4, wherein the step of selecting at least one target 4G neighbor according to the included 4G neighbor information comprises:

6. The method according to claim 5, wherein the step of determining at least one target 4G neighbor according to the measurement result of each 4G neighbor is implemented in any one of the following manners:

7. The method according to claim 4, wherein when the system message does not include 4G neighbor cell information or the at least one target 4G neighbor cell is not configured with a corresponding 5G neighbor cell, the method further comprises;

executing redirection return 4G network operation;

4G network operation of quick return is executed;

performing a 5G network search returns a 5G network operation.

8. The method of claim 7, wherein when the suspended data traffic requires a 5G network to continue to run, before performing the return operation, the method further comprises:

9. The method of claim 7, wherein the step of determining whether the pending data service requires a 5G core network to continue to operate comprises determining whether a PDU session corresponding to the pending data service satisfies any one of the following conditions:

10. The method according to claim 1, wherein after the target service is completed, detecting whether there is still data service in progress in the user equipment;

11. A system for network fallback return, comprising:

an initial position detection module, configured to detect whether initial position information is recorded by a user equipment after the user equipment completes a target service by falling from a 5G network to a 3G network, where the initial position information at least includes 5G serving cell information and 5G neighbor cell information corresponding to the user equipment before the network falls;

a current position obtaining module, configured to obtain current position information of the user equipment when the initial position information is recorded in the user equipment, where the current position information at least includes 5G neighboring cell information corresponding to the current user equipment;

a cell measurement module for measuring the searched cell;

a first camping module, configured to camp the ue to the target cell actively.

12. The system for returning after network fallback as claimed in claim 11, wherein the initial location information further comprises: 4G neighbor cell information corresponding to the user equipment before network fallback;

13. The system for returning after network fallback as claimed in claim 11, wherein the initial location information further comprises: the 3G/2G service cell to which the user equipment initially falls back, GPS information of the user equipment before the fall back, WLAN access point information of the user equipment before the fall back, and/or Bluetooth access point information of the user equipment before the fall back;

14. The system for returning after a network resignation of claim 11, further comprising:

a 5G neighboring cell configuration detection module, configured to detect whether the at least one target 4G neighboring cell is configured with a corresponding 5G neighboring cell;

15. The system of claim 14, wherein the target 4G neighbor determination module comprises:

and the determining unit is used for determining at least one target 4G adjacent cell according to the measurement result of each 4G adjacent cell.

16. The system of claim 15, wherein the determining unit is implemented by any one of the following methods:

17. The system for network fallback, according to claim 14, further comprising:

a pending service detection module, configured to detect whether there is a pending data service in the user equipment when the 4G neighbor detection module detects that the system message does not include 4G neighbor information or the 5G neighbor configuration detection module detects that the at least one target 4G neighbor is not configured with a corresponding 5G neighbor;

executing redirection return 4G network operation;

4G network operation of quick return is executed;

performing a 5G network search returns a 5G network operation.

18. The system for network fallback, according to claim 17, further comprising:

19. The system of claim 17, wherein the network requirement determining module is specifically configured to determine whether a PDU session corresponding to the suspended data service meets any one of the following conditions:

20. The system for returning after a network resignation of claim 11, further comprising:

an interruptible judging module, configured to judge whether an ongoing data service is interruptible when the ongoing data service exists in a user equipment;

a state switching module, configured to enable the ue to actively enter a non-Cell-DCH state when the ongoing data service can be interrupted;

21. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for returning after a network fallback as claimed in any one of the claims 1 to 10 when executing the computer program.

22. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of returning after a network fallback as claimed in one of the claims 1 to 10.