WO2021098389A1

WO2021098389A1 - Redirecting method and electronic apparatus for inactive terminal, and computer readable medium

Info

Publication number: WO2021098389A1
Application number: PCT/CN2020/118935
Authority: WO
Inventors: 何金招; 胡敏; 孙珊珊
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-11-18
Filing date: 2020-09-29
Publication date: 2021-05-27
Also published as: CN112822789A

Abstract

The present disclosure provides a redirecting method for an inactive terminal. The method comprises: determining a redirecting target in response to an initialization uplink transfer message of a distributed base station, and sending a downlink radio resource control transfer message to the distributed base station, such that a terminal completes redirection according to the redirecting target, wherein the distributed base station sends, on the basis of a radio resource control resume request message of the terminal, the initialization uplink transfer message, the downlink radio resource control transfer message carries the redirecting target, and the terminal is in an inactive state. The present disclosure further provides a redirecting device for an inactive terminal, an electronic apparatus, and a computer readable medium.

Description

Redirection method of inactive state terminal, electronic equipment and computer readable medium

Cross-references to related applications

This application is filed based on a Chinese patent application with an application number of 201911127753.8 and an application date of November 18, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by way of introduction.

Technical field

The embodiments of the present disclosure relate to the field of mobile communication technology, and in particular, to a redirection method of an inactive terminal.

Background technique

When the inactive terminal performs the called voice service, the interaction process between the terminal and the base station is as follows: Send a radio resource control resume request (RRC Resume Request) message to the target base station (gNB), and the target base station to the anchor base station (oldgNB) sends a RETRIEVE UE CONTEXT REQUEST message, the anchor base station returns a RETRIEVE UE CONTEXT RESPONSE message to the target base station, and the target base station sends radio resource control to the terminal after receiving the terminal context Resume (RRC Resume) message, the terminal replies to the target base station with a radio resource control resume (RRC Resume Complete) message, and then the target base station sends a radio resource control release (RRC Release) message to the terminal to instruct the terminal to redirect.

Since the inactive state terminal has many interaction procedures with the base station during redirection, the delay is long, and if the signal of the terminal is not ideal, the call is likely to be dropped, which affects the user experience.

Summary of the invention

The embodiments of the present disclosure provide a redirection method of an inactive terminal, an electronic device, and a computer-readable medium.

In a first aspect, embodiments of the present disclosure provide a redirection method for an inactive terminal, which includes: determining a redirection target in response to an initial uplink transfer message of a decentralized base station, and sending a downlink radio resource control transfer message to the decentralized base station, For the terminal to complete the redirection according to the redirection target; the decentralized base station sends the initial uplink transfer message based on the radio resource control recovery request message of the terminal, and the downlink radio resource control transfer message carries the redirection target, The terminal is in an inactive state.

In a second aspect, embodiments of the present disclosure provide a redirection method for an inactive terminal, which includes: sending an initial uplink transfer message in response to a radio resource control recovery request message of the terminal, so that the centralized base station can determine the redirection target, and the downlink The radio resource control transfer message is forwarded to the terminal, and the terminal is redirected according to the redirection target; the downlink radio resource control transfer message carries the redirection target, and the terminal is in an inactive state.

In a third aspect, embodiments of the present disclosure provide a method for redirecting an inactive terminal, which includes: sending a radio resource control recovery request message to a base station, and redirecting in response to the radio resource control release message returned by the base station, so The radio resource control recovery request message carries a voice call instruction, the radio resource control release message carries the redirection target, and the terminal performing the redirection is in an inactive state.

In a fourth aspect, an embodiment of the present disclosure provides a redirection device for an inactive terminal, which includes: a receiving module, configured to receive an initial uplink transfer message from a decentralized base station, which is based on a radio resource control recovery request of the terminal Message to send the initial uplink transfer message, and the terminal is in an inactive state, and the radio resource control recovery request message carries a voice call indication; a redirection module is used to determine the redirection target of the terminal; and The module is used to send the redirection target to the decentralized base station for the terminal to perform redirection according to the redirection target.

In a fifth aspect, embodiments of the present disclosure provide an electronic device, which includes: one or more processors; a storage device, on which one or more programs are stored, when the one or more programs are used by the one or more A plurality of processors execute, so that the one or more processors implement the method for redirecting the inactive state terminal according to the present disclosure.

In a sixth aspect, an embodiment of the present disclosure provides a computer-readable medium on which a computer program is stored, and when the program is executed by a processor, the method for redirecting an inactive terminal according to the present disclosure is implemented.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure, and do not constitute a limitation to the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed example embodiments with reference to the accompanying drawings. In the accompanying drawings:

FIG. 1 is a flowchart of a method for redirecting an inactive terminal according to an embodiment of the present disclosure;

2 is a flowchart of another method for redirecting an inactive terminal according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of another method for redirecting an inactive terminal according to an embodiment of the present disclosure;

4 is a flowchart of another method for redirecting an inactive terminal according to an embodiment of the present disclosure;

FIG. 5 is a flowchart of another method for redirecting an inactive terminal according to an embodiment of the present disclosure;

6 is a flowchart of another method for redirecting an inactive terminal according to an embodiment of the present disclosure;

FIG. 7 is a flowchart of another redirection method (in the called terminal base station) of an inactive terminal according to an embodiment of the disclosure;

FIG. 8 is a flowchart of another method for redirecting a terminal in an inactive state (between called terminal base stations) according to an embodiment of the present disclosure;

FIG. 9 is a flowchart of another redirection method (in the calling terminal base station) of an inactive terminal according to an embodiment of the disclosure;

FIG. 10 is an exemplary block diagram of another device for redirecting a terminal in an inactive state according to an embodiment of the present disclosure.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following describes in detail the redirection method, electronic equipment, and computer-readable medium of the inactive state terminal provided by the present invention with reference to the accompanying drawings.

Hereinafter, example embodiments will be described more fully with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete, and to enable those skilled in the art to fully understand the scope of the present disclosure.

As used herein, the term "and/or" includes any and all combinations of one or more related listed items.

The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a" and "the" are also intended to include the plural forms, unless the context clearly dictates otherwise. It will also be understood that when the terms "comprising" and/or "made of" are used in this specification, it specifies the presence of the described features, wholes, steps, operations, elements and/or components, but does not exclude the presence or Add one or more other features, wholes, steps, operations, elements, components, and/or groups thereof.

The embodiments described herein may be described with reference to plan views and/or cross-sectional views with the help of ideal schematic diagrams of the present disclosure. Therefore, the example illustrations may be modified according to manufacturing technology and/or tolerances. Therefore, the embodiment is not limited to the embodiment shown in the drawings, but includes a modification of the configuration formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the figures exemplify the specific shapes of the regions of the elements, but are not intended to be limiting.

Unless otherwise defined, the meanings of all terms (including technical and scientific terms) used herein are the same as those commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the related technology and the present disclosure, and will not be interpreted as having idealized or excessive formal meanings, Unless this article specifically defines it as such.

The embodiments of the present disclosure provide a redirection method, electronic equipment, and computer readable medium for an inactive terminal to solve the time delay caused by the complicated interaction process with the base station when the inactive terminal establishes a voice service in some situations. , The problem of easy dropped calls.

The present disclosure is directed to the fact that when the 5G inactive state terminal resumes the connection with the base station, there are many interaction procedures between the terminal and the base station, resulting in a long delay, and it is easy to cause call drops and affect user experience.

The base stations of the present disclosure include centralized base stations and decentralized base stations, and a centralized base station can face one or more decentralized base stations. The decentralized base stations face the terminals, and the centralized base stations face the core network. The centralized base station can exchange information with the authentication management entity in the core network, and can also exchange information with other base stations. In some embodiments, the centralized base station and the decentralized base station are independent base stations. In other embodiments, the centralized base station and the decentralized base station belong to two parts of the same base station.

In the first aspect, the embodiments of the present disclosure provide a redirection method of an inactive terminal, and the method is applied to a centralized base station on the network side. The redirection method includes: determining a redirection target in response to an initial uplink transfer message of a decentralized base station, and sending a downlink radio resource control transfer message to the decentralized base station for the terminal to complete the redirection according to the redirection target; the decentralized base station is The initial uplink transfer message is sent based on the radio resource control recovery request message of the terminal, the downlink radio resource control transfer message carries a redirection target, and the terminal is in an inactive state.

FIG. 1 is a flowchart of a method for redirecting a terminal in an inactive state according to an embodiment of the present disclosure.

1, the redirection method of the inactive terminal is applied to the centralized base station on the network side, and specifically includes:

101. Receive an initial uplink transfer message from a distributed base station.

It should be noted that the initial uplink transfer message is sent by the decentralized base station based on the radio resource control recovery request message sent by the called terminal, and the initial uplink transfer message carries the content of the radio resource control recovery request message. The resume request message carries a voice call indication, that is, the initial uplink transfer message carries a voice call indication.

102. The evolved packet system falls back and determines the redirection target.

After receiving the initial uplink transfer message, the centralized base station makes an Evolved Packet System Fall Back (EPSFB) decision according to the voice call reason carried in the radio access control recovery request message, performs blind redirection, and determines the redirection the goal. Among them, the redirection target can be a 3G (Third Generation) network, a 4G (Fourth Generation) network, or a 5G (Fifth Generation) network.

103. Send a downlink radio resource control transfer message to the distributed base station.

The downlink radio resource control transfer message carries the content of the radio resource control release (RRC Release) message, and the content of the radio resource control release message includes the redirection target.

In some embodiments, the redirection target includes a redirected network and a reselected frequency point, that is, a voice redirection network and a voice redirection frequency point.

The redirection method of the inactive terminal provided in this embodiment obtains the redirection target in response to the radio resource control recovery request message of the terminal, and sends a downlink radio resource control transfer message to the decentralized base station for the terminal to follow the redirection The goal is to complete the redirection, that is, send a radio resource control release message to the terminal for the terminal to perform redirection, which reduces the message flow between the terminal and the base station, thereby shortening the call delay and reducing the call drop rate. , Thereby improving the voice user experience.

Referring to Figure 2, the redirection method for inactive terminals is used in the centralized base station on the network side. When the calling terminal calls the called terminal, the called terminal interacts with its corresponding base station, and the interaction flow is performed within the station, that is, the called terminal interacts with its corresponding base station. Call the terminal to migrate from the inactive state to the connected state in the station. The redirection method of the inactive state terminal includes:

201. Receive an initial uplink transfer message of the decentralized base station.

In some embodiments, after receiving the radio resource recovery request message from the terminal, the decentralized base station sends an initial uplink transfer message to the centralized base station. The initial uplink transfer message carries the radio resource control recovery request message, wherein the radio resource recovery The request message carries a voice call indication.

202. Perform a blind redirection decision in response to the initial uplink transfer message, and determine the redirection target of the called terminal.

After the centralized base station receives the initial uplink transfer message sent by the decentralized base station, it performs a blind redirection decision to determine the redirection target of the called terminal, such as determining a voice point.

203. Send a downlink radio resource control transfer message to the distributed base station.

In some embodiments, the downlink radio resource control transfer message carries the radio resource control release message, and the radio resource control release message carries the redirection target.

The centralized base station sends a downlink radio resource control transfer message to the decentralized base station. After the decentralized base station receives the downlink radio resource control transfer message, it sends a radio resource control release message to the terminal. After the terminal receives the radio resource control release message, it is based on the reconfiguration. The targeting target executes the redirection process, and preferentially accesses the voice and audio points indicated in the redirection target.

In some embodiments, when the calling terminal calls the called terminal, the Authentication Management Function (AMF) entity corresponding to the calling terminal exchanges information with the centralized base station, that is, the centralized base station receives the information from the decentralized base station. Before initializing the uplink transfer message, it also includes:

The centralized base station receives the voice establishment request message of the AMF entity. Wherein, the voice establishment request message includes a voice identifier, that is, a voice identifier with a quality of service flow identifier equal to 1, and may also include a protocol data unit session resource modification request (PDU SESSION RESOURCE MODIFY REQUEST) message and a protocol data unit session resource establishment (PDU SESSION RESOURCE SETUP REQUEST) request message.

It should be pointed out that the centralized base station mentioned in this embodiment is the centralized base station that lastly served the called terminal. When not explicitly stated, the centralized base station refers to the centralized base station that lastly served the called terminal. The centralized base station receives the voice establishment request message from the AMF entity, and sends a paging message to the decentralized base station.

Send a paging message to the decentralized base station based on the voice establishment request message, so that the decentralized base station sends out the initialization after receiving the radio resource control recovery request sent by the called terminal in response to the paging message Uplink transfer message.

It should be noted that the centralized base station sends a radio access network paging message to all scattered base stations in the radio access network notification area. The centralized base station sends a paging message to the decentralized base station through the XN interface, the decentralized base station forwards the paging message to the called terminal, and the called terminal sends a radio resource control recovery request to the decentralized base station after receiving the paging message, and the decentralized base station receives After receiving the radio resource control recovery request, the initial uplink transfer message is sent to the centralized base station.

In some embodiments, after receiving the AMF entity voice setup request message, the centralized base station also sends a voice setup response message to the AMF entity. In the voice establishment response message, the protocol data unit session resource modification request message and the protocol data unit session resource establishment request message are included, and the voice establishment failure message is carried. The reason for the failure is the IP Multimedia System (IMS) Voice Evolution Packet System (EPS) ) Fallback or multiple radio access (RAT) fallback triggers.

In some embodiments, the redirection method of the inactive terminal is used for the centralized base station on the network side. When the calling terminal calls the called terminal, the called terminal interacts with its corresponding base station. The interaction flow is the interaction within the station. The process, that is, the terminal moves from the inactive state to the connected state in the station.

Referring to Figure 3, the redirection method of inactive state terminals is used for centralized base stations on the network side. When the calling terminal calls the called terminal, the called terminal interacts with its corresponding base station, and the interaction flow is carried out between the base stations. That is, the called terminal transitions from the inactive state to the connected state between the base stations. The redirection method of the inactive state terminal includes:

301. Receive an initial uplink transfer message of the decentralized base station.

Wherein, the initial uplink transfer message carries the radio resource control recovery request message, and the decentralized base station sends the initial uplink transfer message in response to the radio resource control recovery request message of the terminal.

302: Send a request message for retrieving the called terminal context to the original base station.

Wherein, the original base station is the last (recently) base station serving the called terminal.

After receiving the initial uplink transfer (intial-UL RRC Message Transfer) message sent by the decentralized base station, the centralized base station sends a RETRIEVE UE CONTEXT REQUEST message to the original base station (oldGNB).

303. Receive the called terminal context retrieval response message returned by the original base station.

After the original base station receives the called terminal context request message, it returns the called terminal context response (RETRIEVE UE CONTEXT RESPONSE) message to the centralized base station.

304. Perform a redirection decision based on the context of the called terminal, and determine the redirection target of the called terminal.

After the centralized base station receives the called terminal context response message returned by the original base station, it makes a redirection decision and determines the redirection target of the called terminal, such as determining the voice point.

305. Send a downlink radio resource control transfer message to the distributed base station.

Wherein, the downlink radio resource control transfer message carries the radio resource control release message for the terminal to perform redirection according to the redirection target.

In some embodiments, when the calling terminal calls the called terminal, the AMF entity corresponding to the calling terminal, the original base station, and the centralized base station exchange information, that is, the centralized base station receives the initial uplink transfer message from the decentralized base station, Also includes:

Receiving a radio access network paging message sent by the original base station.

In some embodiments, the radio access network paging message sent by the original base station interacts with the AMF before, specifically, the voice setup request message sent by the AMF to the original base station, and the voice setup request message contains the voice identifier, that is, the quality of service flow. The voice identifier whose identifier is equal to 1, may also include a protocol data unit session resource modification request message and a protocol data unit session resource establishment request message.

In some embodiments, when the original base station sends a radio access network paging message to the centralized base station, it also sends a voice setup response message to the AMF. The voice setup response message contains the protocol data unit session resource modification request message and the protocol. The session resource establishment request message of the data unit carries a voice establishment failure message. The reason for the failure is triggered by the fallback of the IP Multimedia System (IMS) Voice Evolution Packet System (EPS) or the fallback of multiple radio access (RAT).

In response to the radio access network paging message, send a paging message to the decentralized base station for the decentralized base station to send after receiving a radio resource control recovery request sent by the called terminal in response to the paging message The initial uplink transfer message.

Referring to Figure 4, the redirection method for inactive terminals is used in the centralized base station on the network side, and the inactive terminal is the calling terminal, and the inactive calling terminal sends a voice setup request message to the base station. Before the voice communication is established, The inactive state transitions to the connected state. The redirection method of the inactive state terminal includes:

401. Receive an initial uplink transfer message of the decentralized base station.

The initial uplink transfer message carries the radio resource control recovery request message, and the decentralized base station sends the initial uplink transfer message in response to the radio resource control recovery request message of the terminal.

In some embodiments, the initial uplink transfer message is sent by the decentralized base station based on the radio resource control recovery request message sent by the called terminal, and the initial uplink transfer message carries the content of the radio resource control recovery request message. The control recovery request message carries a voice call indication, that is, the initial uplink transfer message carries a voice call indication.

It should be noted that when the terminal is a called terminal, the called terminal initiates a radio resource control recovery request based on the paging request of the decentralized base station. When the terminal is the calling terminal, the calling terminal actively initiates a radio resource control recovery request based on the user's voice call.

402. Perform a redirection decision in response to the initial uplink transfer message, and determine the redirection target of the calling terminal.

After receiving the initial uplink transfer message, the centralized base station makes an Evolved Packet System Fall Back (EPSFB) decision according to the voice call reason carried in the radio access control recovery request message to determine the redirection target. Among them, the redirection target can be a 3G (Third Generation) network, a 4G (Fourth Generation) network, or a 5G (Fifth Generation) network.

It should be noted that when the terminal is a called terminal, the centralized base station performs blind redirection after receiving the initial uplink transfer message. When the terminal is the calling terminal, the centralized base station performs redirection after receiving the initial uplink transfer message, which is not blind redirection.

403. Send a downlink radio resource control transfer message to the distributed base station.

The downlink radio resource control transfer message carries the radio resource control release message for the terminal to perform redirection according to the redirection target.

In the second aspect, the present disclosure provides a redirection method for inactive state terminals, and the redirection method is applied to a decentralized base station on the network side. The redirection method includes: sending an initial uplink transfer message in response to the radio resource control recovery request message of the terminal, so that the centralized base station can determine the redirection target, and forward the downlink radio resource control transfer message to the terminal, and make the terminal according to the reconfiguration. The target is redirected; the downlink radio resource control transfer message carries the redirect target, and the terminal is in an inactive state.

Fig. 5 is a flowchart of a method for redirecting a terminal in an inactive state according to a disclosed embodiment.

Referring to FIG. 5, the redirection method of the inactive state terminal is used for decentralized base stations, and specifically includes:

501: Receive a radio resource control recovery request message of a terminal.

When the terminal is the calling terminal, the calling terminal sends a radio resource control recovery request message to the decentralized base station in response to the user's call request.

When the terminal is a called terminal, the called terminal sends a radio resource control recovery request message to the distributed base station after receiving the paging message from the distributed base station.

In some embodiments, the decentralized base station forwards the paging request to the terminal based on the paging request of the centralized base station, and the centralized base station obtains the paging message in two ways. In the first way, when the calling terminal initiates a voice request to the called terminal, the AMF entity corresponding to the calling terminal issues a voice setup request, where the voice setup request message contains a voice identifier, that is, the quality of service flow identifier is equal to 1. The voice identification may also include a protocol data unit session resource modification request message and a protocol data unit session resource establishment request message. After receiving the voice setup request, the centralized base station forwards the voice setup request to the decentralized base station through the XN interface, and the decentralized base station forwards the paging message to the called terminal. It should be noted that the centralized base station sends a radio access network paging message to all scattered base stations in the radio access network notification area.

In the second way, when the calling terminal initiates a voice request to the called terminal, the AMF entity sends a voice setup request to the original base station, and the original base station sends a radio access network paging request to the centralized base station according to the voice setup request, and the centralized base station sends the decentralized base station Forward the page request.

It should be noted that the voice establishment request message includes a voice identifier, that is, a voice identifier with a quality of service flow identifier equal to 1, and may also include a protocol data unit session resource modification request message and a protocol data unit session resource establishment request message.

502. Send the initial uplink transfer message to the centralized base station.

Wherein, the initial uplink transfer message carries the radio resource control recovery request message for the centralized base station to determine the redirection target.

After receiving the initial uplink transfer message, the centralized base station performs the fallback decision of the evolved packet system according to the voice call reason carried in the radio access control recovery request message, and determines the redirection target. Among them, the redirection target can be a 3G network, a 4G network, or a 5G network.

503: Receive a downlink radio resource control transfer message returned by the centralized base station.

Wherein, the downlink radio resource control transfer message carries the radio resource control release message. The downlink radio resource control transfer message carries the content of the radio resource control release message, and the content of the radio resource control release message contains the redirection target.

The redirection target includes the redirected network and the frequency of reselection, that is, the voice redirection network and the voice redirection frequency.

504. Forward the radio resource control release message to the terminal.

After receiving the downlink radio resource control transfer message sent by the centralized base station, the decentralized base station forwards the radio resource control release message to the terminal, where the radio resource control release message carries the redirection target.

In a third aspect, the present disclosure provides a redirection method for an inactive terminal, including: sending a radio resource control recovery request message to a base station, and redirecting in response to a radio resource control release message returned by the base station, the radio resource The control recovery request message carries a voice call instruction, the radio resource control release message carries the redirection target, and the terminal performing the redirection is in an inactive state.

FIG. 6 is a flowchart of a redirection method for an inactive terminal according to an embodiment of the disclosure, and the redirection method is applied to a terminal.

601: Send a radio resource control recovery request message to the base station.

When the terminal is actively calling the terminal, the terminal sends a radio resource control recovery request message to the decentralized base station in response to the user's call request, and the radio resource control recovery request message carries a voice call instruction.

When the terminal is the called terminal, the called terminal sends a radio resource control recovery request message to the base station after receiving the radio access network paging request sent by the base station.

The manner in which the base station sends the radio access network paging request is the same as in the foregoing embodiment, and will not be repeated here.

602. Redirection is performed in response to a radio resource control release message returned by the base station.

After receiving the radio resource control release message returned by the decentralized base station, the terminal carries the redirection target according to the radio resource control release message.

In some embodiments, after receiving the radio resource control recovery request message, the decentralized base station sends an initial uplink transfer message to the centralized base station. The initial uplink transfer message carries a radio resource control recovery request message, where the radio resource recovery request message carries Voice call instructions. After the centralized base station receives the initial uplink transfer message sent by the decentralized base station, it makes a redirection decision and determines the redirection target of the called terminal, such as determining a voice point. The centralized base station sends a downlink radio resource control transfer message to the decentralized base station. After the decentralized base station receives the downlink radio resource control transfer message, it sends a radio resource control release message to the terminal. After the terminal receives the radio resource control release message, it is based on the reconfiguration. The targeting target executes the redirection process, and gives priority to access the voice points indicated in the redirection target.

The following describes the redirection method of the present disclosure in more detail in combination with the above-mentioned centralized base station, decentralized base station, and terminal.

Referring to FIG. 7, the terminal of the redirection process is the called terminal, and the called terminal is in the inactive state, and the called terminal realizes the transition from the inactive state to the connected state in the station.

701: Voice establishment request.

When the calling terminal initiates a voice call request to the called terminal, the AMF sends a voice setup request to the centralized base station. The voice establishment request includes a voice identifier, that is, a voice identifier with a quality of service flow identifier equal to 1, and may also include a protocol data unit session resource modification request (PDU SESSION RESOURCE MODIFY REQUEST) message and a protocol data unit session resource establishment (PDU) SESSION RESOURCE SETUP REQUEST) request message.

702. Voice establishment response.

After receiving the voice setup request, the centralized base station sends a voice setup response to the AMF entity. The base station here is the centralized base station that serves the called terminal last. In the voice establishment response message, the protocol data unit session resource modification request message and the protocol data unit session resource establishment request message are included, and the voice establishment failure message is carried. The reason for the failure is the IP Multimedia System (IMS) Voice Evolution Packet System (EPS) ) Fallback or multiple radio access (RAT) fallback triggers.

703. Send a wireless access network paging message.

After receiving the voice establishment request, the centralized base station sends a wireless access network paging message to the decentralized base station through the XN interface.

It should be pointed out that the centralized base station sends a radio access network paging message to all scattered base stations in the radio access network notification area.

704: Forward the radio access network paging message.

The decentralized base station forwards the radio access network paging message to the called terminal.

705: Initiate a radio resource control recovery request.

The called terminal sends a radio resource control recovery request to the decentralized base station, and the radio resource control recovery request carries a voice call indication.

706. Send an initialization uplink radio resource control transfer message.

The decentralized base station sends an initial uplink radio resource control transfer message to the centralized base station, where the initial uplink radio resource control transfer message includes the content of the radio resource control recovery request message.

708, the blind redirection decision.

In response to the initial uplink transfer message, a blind redirection decision of the evolved packet system fallback is performed, and the redirection target of the called terminal is determined.

709. Send a downlink radio resource control transfer message.

After the centralized base station obtains the redirection target, it sends a downlink radio resource control transfer message to the decentralized base station. The downlink radio resource control transfer message carries the content of the radio resource control release message, and the radio resource control release message contains the redirection target, such as 4G network.

710: Send a radio resource control release message.

After receiving the downlink radio resource control transfer message of the centralized base station, the decentralized base station sends a radio resource control release message to the terminal, and the radio resource control release message contains the redirection target.

711, redirect to the target frequency.

When the terminal receives the radio resource control release message sent by the decentralized base station, it is redirected to the 4G network, establishes a connection with the base station eNB of the 4G network, and performs voice bearer in the 4G network system to establish a voice service, then normal voice services can be performed .

Referring to FIG. 8, the terminal in the redirection process is the called terminal, and the called terminal is in an inactive state, and the called terminal realizes the transition from the inactive state to the connected state between the base station and the base station.

801: Voice establishment request.

When the calling terminal initiates a voice call request to the called terminal, the AMF sends a voice setup request to the centralized original base station (oldGNB). The voice establishment request includes a voice identifier, that is, a voice identifier with a quality of service flow identifier equal to 1, and may also include a protocol data unit session resource modification request (PDU SESSION RESOURCE MODIFY REQUEST) message and a protocol data unit session resource establishment (PDU) SESSION RESOURCE SETUP REQUEST) request message.

802: Voice establishment response.

After receiving the voice setup request, the original base station sends a voice setup response to the AMF entity. The original base station here is the last base station serving the called terminal. In the voice establishment response message, the protocol data unit session resource modification request message and the protocol data unit session resource establishment request message are included, and the voice establishment failure message is carried. The reason for the failure is the IP Multimedia System (IMS) Voice Evolution Packet System (EPS) ) Fallback or multiple radio access (RAT) fallback triggers.

803. Send a radio access network paging message.

After receiving the voice establishment request, the original base station sends a radio access network paging message to each centralized base station in the radio access network notification area through the XN interface.

804: Forward the radio access network paging message.

After the centralized base station sends the radio access network paging message, it forwards the radio access network paging message to the decentralized base station.

805: Send a wireless access network paging message.

After receiving the radio access network paging message, the decentralized base station sends the radio access network paging message to the terminal.

806: Initiate a radio resource control recovery request.

807. Send an initial uplink radio resource control transfer message.

808: Send a terminal context retrieval request.

809: Send a response message for retrieving the called terminal context.

810: The evolved system packet falls back and redirects the decision.

After receiving the context response message of the called terminal, the centralized base station makes an evolution system packet fallback redirection decision, and determines the redirection target of the called terminal, such as a 4G network.

811. Send a downlink radio resource control transfer message.

After obtaining the redirection target, the centralized base station sends a downlink radio resource control transfer message to the decentralized base station. The downlink radio resource control transfer message carries the content of the radio resource control release message, and the radio resource control release message contains the redirection target.

812: Send a radio resource control release message.

813, Redirect to the target frequency.

Referring to FIG. 9, the terminal of the redirection process is the master terminal, and the master terminal is in an inactive state.

901: Initiate a radio resource control recovery request.

The calling terminal responds to the user's call request and initiates a radio resource control recovery request to the decentralized base station, and the radio resource control recovery request carries a voice call indication.

902: Send an initial uplink radio resource control transfer message.

903: The evolved system packet falls back and redirects the decision.

In response to the initial uplink transfer message, perform an evolution system packet fallback redirection decision, and determine the redirection target of the called terminal.

904. Send a downlink radio resource control transfer message.

905: Send a radio resource control release message.

906, redirect to the target frequency point.

In a fourth aspect, embodiments of the present disclosure provide a redirection device for an inactive terminal, which can redirect the inactive terminal and perform voice services.

Referring to FIG. 10, the redirection device of the inactive terminal can be used to concentrate the base station, so that the terminal can be redirected. Redirection devices include:

The receiving module 1001 is configured to receive an initial uplink transfer message of a decentralized base station. The decentralized base station sends the initial uplink transfer message based on a radio resource control recovery request message of the terminal, and the terminal is in an inactive state. The radio resource control recovery request message carries a voice call indication;

The redirection module 1002 is used to determine the redirection target of the evolution system packet fallback;

The sending module 1003 is configured to send the redirection target to the decentralized base station, so that the terminal can perform redirection according to the redirection target.

In the inactive terminal redirection device provided by the embodiments of the present disclosure, the receiving module receives the initial uplink transfer message of the decentralized base station, the redirection module decides the evolution system packet fallback redirection, and the sending module sends the redirection target to the decentralized base station to For the terminal to perform redirection according to the redirection target, that is, to send a radio resource control release message to the terminal for the terminal to perform redirection, which reduces the message flow between the terminal and the base station, thereby shortening the call Delay, while reducing the dropped call rate, thereby improving the voice user experience.

In a fifth aspect, embodiments of the present disclosure provide an electronic device, which includes:

One or more processors;

The storage device has one or more programs stored thereon, and when the one or more programs are executed by one or more processors, the one or more processors implement any one of the aforementioned methods for inactive state terminals.

In a sixth aspect, embodiments of the present disclosure provide a computer-readable medium on which a computer program is stored, and when the program is executed by a processor, any one of the aforementioned methods for an inactive terminal is implemented.

A person of ordinary skill in the art can understand that all or some of the steps, functional modules/units in the system, and apparatus in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. In the hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may consist of several physical components. The components are executed cooperatively. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known by those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media. Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage device, or Any other medium used to store desired information and that can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .

Example embodiments have been disclosed herein, and although specific terms are adopted, they are used and should only be construed as general descriptive meanings, and are not used for the purpose of limitation. In some instances, it is obvious to those skilled in the art that, unless expressly indicated otherwise, the features, characteristics, and/or elements described in combination with a specific embodiment may be used alone, or features, characteristics, and/or elements described in combination with other embodiments may be used. Combination of features and/or components. Therefore, those skilled in the art will understand that various changes in form and details can be made without departing from the scope of the present disclosure as set forth by the appended claims.

Claims

A redirection method for an inactive terminal, which includes:

Determine the redirection target in response to the initial uplink transfer message of the dispersed base station;

Sending a downlink radio resource control transfer message to the decentralized base station for the terminal to complete the redirection according to the redirection target, wherein the decentralized base station sends the initial uplink transfer message based on a radio resource control recovery request message of the terminal, The downlink radio resource control transfer message carries a redirection target, and the terminal is in an inactive state.
The method according to claim 1, wherein the terminal is a called terminal, and the method comprises:

Receiving the initial uplink transfer message of the decentralized base station; the initial uplink transfer message carries the radio resource control recovery request message, and the decentralized base station sends the initial uplink transfer in response to the radio resource control recovery request message of the terminal news;

Perform a blind redirection decision in response to the initial uplink transfer message, and determine the redirection target of the called terminal;

Sending a downlink radio resource control transfer message to the decentralized base station, where the downlink radio resource control transfer message carries the radio resource control release message for the terminal to perform redirection according to the redirection target.
The method according to claim 2, wherein before the receiving the initial uplink transfer message of the decentralized base station, the method further comprises:

Receiving a voice establishment request message, where the voice establishment request message includes a voice identifier;

Send a paging message to the decentralized base station based on the voice establishment request message, so that the decentralized base station sends out the initialization after receiving the radio resource control recovery request sent by the called terminal in response to the paging message Uplink transfer message.
The method according to claim 2, wherein after the receiving the voice establishment request message, the method further comprises:

Send a voice establishment response message to the authentication management entity based on the voice establishment request message.
The method according to claim 1, wherein the terminal is a called terminal, and the method comprises:

Receiving the initial uplink transfer message of the decentralized base station; the initial uplink transfer message carries the radio resource control recovery request message, and the decentralized base station sends the initial uplink transfer in response to the radio resource control recovery request message of the terminal news;

Sending a context retrieval request message for the called terminal to the original base station, where the original base station is the last base station serving the called terminal;

Receiving the called terminal context retrieval response message returned by the original base station;

Making a redirection decision based on the context of the called terminal, and determining the redirection target of the called terminal;

Sending a downlink radio resource control transfer message to the decentralized base station, where the downlink radio resource control transfer message carries the radio resource control release message for the terminal to perform redirection according to the redirection target.
The method according to claim 5, wherein before the receiving the initial uplink transfer message of the decentralized base station, the method further comprises:

Receiving a radio access network paging message sent by the original base station;

In response to the radio access network paging message, send a paging message to the decentralized base station for the decentralized base station to send after receiving a radio resource control recovery request sent by the called terminal in response to the paging message The initial uplink transfer message.
The method according to claim 1, wherein the terminal is a calling terminal, and the method comprises:

Receiving the initial uplink transfer message of the decentralized base station; the initial uplink transfer message carries the radio resource control recovery request message, and the decentralized base station sends the initial uplink transfer in response to the radio resource control recovery request message of the terminal news;

Making a redirection decision in response to the initial uplink transfer message, and determining the redirection target of the calling terminal;

Sending a downlink radio resource control transfer message to the decentralized base station, where the downlink radio resource control transfer message carries the radio resource control release message for the terminal to perform redirection according to the redirection target.
The method according to any one of claims 1-7, wherein the redirection target includes a redirected network and a reselected frequency point.
A redirection method for an inactive terminal, which includes:

In response to the radio resource control recovery request message of the terminal, an initial uplink transfer message is sent for the centralized base station to determine the redirection target, and the downlink radio resource control transfer message is forwarded to the terminal, and the terminal is redirected according to the redirection target The downlink radio resource control transfer message carries a redirection target, and the terminal is in an inactive state.
The method according to claim 9, wherein the method comprises:

Receiving a radio resource control recovery request message of the terminal;

Sending the initial uplink transfer message to the centralized base station; the initial uplink transfer message carries the radio resource control recovery request message for the centralized base station to determine the redirection target;

Receiving a downlink radio resource control transfer message returned by the centralized base station, where the downlink radio resource control transfer message carries the radio resource control release message;

Forward the radio resource control release message to the terminal, where the radio resource control release message carries the redirection target.
The method according to any one of claims 9-10, wherein the redirection target includes a redirected network and a reselected frequency point.
A redirection method for an inactive terminal, which includes:

Send a radio resource control recovery request message to the base station, and redirect in response to the radio resource control release message returned by the base station. The radio resource control recovery request message carries a voice call indication, and the radio resource control release message carries For the redirection target, the terminal performing the redirection is in an inactive state.
The method according to claim 12, wherein the terminal is a called terminal, and the called terminal sends a radio resource control recovery request message to the base station after receiving the radio access network paging request sent by the base station.
A redirection device for an inactive terminal, which includes:

The receiving module is configured to receive an initial uplink transfer message from a decentralized base station. The decentralized base station sends the initial uplink transfer message based on a radio resource control recovery request message of the terminal, and the terminal is in an inactive state, and the wireless The resource control restoration request message carries a voice call instruction;

The redirection module is used to determine the redirection target of the terminal;

The sending module is configured to send the redirection target to the decentralized base station for the terminal to perform redirection according to the redirection target.
An electronic device, which includes:

One or more processors;

A storage device having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors implement any one of claims 1-8 The method described in the item.
A computer-readable medium having a computer program stored thereon, which when executed by a processor, implements the method according to any one of claims 1-8.