CN108307382B

CN108307382B - Method and device for acquiring and indicating terminal state

Info

Publication number: CN108307382B
Application number: CN201710026394.1A
Authority: CN
Inventors: 方建民; 黄河; 施小娟
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-01-13
Filing date: 2017-01-13
Publication date: 2022-11-08
Anticipated expiration: 2037-01-13
Also published as: CN108307382A; WO2018130022A1

Abstract

The invention provides a method and a device for acquiring and indicating a terminal state, wherein the method comprises the following steps: a terminal receives an indication message sent by a first base station located in a first Radio Access Technology (RAT), wherein the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state; the terminal acquires a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, wherein the terminal state comprises at least one of the following states: connected state, inactive state, lightly connected state, idle state. The problem that in the related art, after the UE in the non-active state or the light connection state moves across the RATs, the service performance cannot be met due to the fact that the UE cannot know the terminal state is solved, and then the terminal can know the terminal state when the UE moves from the first RAT to the second RAT, and the service performance is guaranteed.

Description

Method and device for acquiring and indicating terminal state

Technical Field

The invention relates to the field of communication, in particular to a method and a device for acquiring and indicating a terminal state.

Background

As shown in fig. 1, in a 4G (4 Generation, fourth Generation) or LTE (Long Term Evolution) mobile communication system, data streams with the same QoS (Quality of Service) requirement are aggregated into a bearer, and both AN Access Network (AN) and a Core Network (Core Network, CN) process QoS according to the bearer. In the 4G system, the access network includes an evolved Node B (eNB) and User Equipment (UE), and a network side bearer on an S1 interface between the eNB and the CN and a radio bearer on an air interface between the eNB and the UE correspond to 1:1.

As shown in fig. 2, the current ongoing 5G (5 Generation) new technology research aims to improve the performance by 1000 times of network throughput, 100 times of device connection number and 10 times of low delay compared with 4G. In a 5G system, the access network will still handle QoS in the concept of bearer. However, the core network will adopt a new mechanism for QoS treatment, that is, the Flow (Flow) concept is adopted, and multiple flows in the core network can be mapped to a single bearer in the access network.

The 5G system will use a unified technical architecture to support enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mtc), high-reliability Low-delay Communication (URLLC), and other services. In the 5G system, the core network, the base station and the UE all make significant evolution. The 5G base station is called the gNB. Similar to the X2 interface between enbs in 4G system, there may also be a direct interface between gnbs in 5G system, called Xn interface. Similar to the S1 interface between eNB and CN in 4G system, the interface between gNB and 5G CN in 5G system is called NG interface. In addition, a transitional base station, called eLTE eNB, is likely to appear in the 5G system, which is closer to LTE eNB (i.e. eNB of the 4G system) in air interface, but which can be directly connected to the 5G CN through NG interface.

Similar to the Light Connection (Light Connection) state in the 4G system, the Inactive (Inactive) state is also proposed in the 5G system. For the UE entering the Inactive state from the connected state, the UE Context (UE Context) on the NG interface is kept, but the connection on the air interface is released.

Generally, for inter-RAT mobility, a UE in a connected state employs handover, and a UE in an idle state employs cell reselection. However, there is currently no solution for mobility of UEs in an inactive or lightly connected state when crossing RATs. In addition, since the delay performance of different RATs is different, NR (New RAT) in the 5G system has lower delay performance than LTE in the 5G system and LTE in the 4G system, and if a UE in an inactive state under NR moves to LTE, such as still entering an inactive state, or moves to LTE, such as entering a light connection state, the performance of the UE will probably not be satisfied for some services (such as URLLC service).

For the problems that the service performance cannot be met due to the fact that the UE in the non-active state or the light connection state cannot know the terminal state after moving across the RATs and the like in the related art, an effective solution is not provided.

Disclosure of Invention

The embodiment of the invention provides a method and a device for acquiring and indicating a terminal state, which are used for at least solving the problems that in the related art, after UE in an inactive state or a light connection state moves across RATs, service performance cannot be met due to the fact that the terminal state cannot be known, and the like.

According to one aspect of the present invention, a method for acquiring a terminal state includes: a terminal receives an indication message sent by a first base station located in a first Radio Access Technology (RAT), wherein the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state;

the terminal acquires a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, wherein the terminal state comprises at least one of the following states: connected state, inactive state, lightly connected state, idle state.

Optionally, the method further comprises:

and the terminal sends a request message to a second base station positioned in a second RAT, wherein the request message carries a recovery identifier and the cross-RAT indication information.

Optionally, the method further comprises:

the terminal sends a connection recovery request message to the first base station or a third base station which is in the same RAT as the first base station, wherein the connection recovery request message at least carries one of the following: and recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell.

Optionally, the signal indication information of the serving cell is at least used for indicating one of the following: signal strength of the serving cell, signal quality of the serving cell; the signal indication information of the neighboring cell is at least used for indicating one of the following: the cell identification of the neighboring cell, the signal strength of the neighboring cell, and the signal quality of the neighboring cell.

Optionally, the second RAT comprises at least one of: a long term evolution mobile communication system LTE, an evolved long term evolution mobile communication system LTE, a new radio access technology mobile communication system NR.

According to another aspect of the present invention, there is also provided a method for indicating a terminal status, including:

sending an indication message to a terminal in a connected state, wherein the indication message carries cross-RAT indication information, the cross-RAT indication information is used for indicating a state when the terminal moves from a first RAT to a second RAT, the terminal is in an inactive state or a light connected state, and the terminal state includes at least one of the following: connected state, inactive state, lightly connected state, idle state.

Optionally, a connection recovery request message sent by the terminal is received, where the connection recovery request message carries at least one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell; and determining whether to recover the connection with the terminal according to the received connection recovery request message.

Optionally, the signal indication information of the serving cell is at least used for indicating one of the following: signal strength of the serving cell, signal quality of the serving cell;

the signal indication information of the neighboring cell is at least used for indicating one of the following: the cell identification of the neighboring cell, the signal strength of the neighboring cell, and the signal quality of the neighboring cell.

According to another aspect of the present invention, there is provided an apparatus for acquiring a terminal status, which is applied to a terminal, and includes: a first receiving module, configured to receive an indication message sent by a base station in a first radio access technology RAT, where the indication message carries inter-RAT indication information, and the terminal is in an inactive state or a light connection state; an obtaining module, configured to obtain a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, where the terminal state includes at least one of: connected state, inactive state, lightly connected state, idle state.

Optionally, the apparatus further comprises: a first sending module, configured to send a request message to a second base station located in a second RAT, where the request message carries a recovery identifier and the inter-RAT indication information.

Optionally, the apparatus further comprises:

a second sending module, configured to send a connection recovery request message to a first base station or to a third base station that is in the same RAT as the first base station, where the connection recovery request message at least carries one of the following: and recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell.

According to another aspect of the present invention, there is also provided an apparatus for indicating a terminal status, including: a third sending module, configured to send an indication message to a terminal in a connected state, where the indication message carries cross-RAT indication information, where the cross-RAT indication information is used to indicate a state when the terminal moves from a first RAT to a second RAT, and the terminal is in an inactive state or a light connected state, where the terminal state includes: connected state, inactive state, lightly connected state, idle state.

Optionally, the second receiving module is configured to receive a connection recovery request message sent by the terminal, where the connection recovery request message carries at least one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell; and the determining module is used for determining whether to recover the connection with the terminal according to the received connection recovery request message.

In the embodiment of the present invention, a computer storage medium may store an execution instruction, where the execution instruction is used to implement the method for acquiring the terminal state in the foregoing embodiment.

According to the invention, the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT according to the cross-RAT indication information carried in the indication information sent by the first base station, so that the problems that the service performance cannot be met and the like caused by the fact that the terminal state cannot be known after the UE in the non-active state or the light connection state moves across the RATs in the related technology are solved, and then the terminal can know the terminal state when the UE moves from the first RAT to the second RAT, and the service performance is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of a 4G structure in the related art;

FIG. 2 is a schematic diagram of a 5G structure in the related art;

fig. 3 is a flowchart of a method for acquiring a terminal status according to an embodiment of the present invention;

fig. 4 is a flowchart of a method of indicating a terminal status according to an embodiment of the present invention;

fig. 5 is a block diagram (one) of the structure of the apparatus for acquiring the terminal status according to the embodiment of the present invention;

fig. 6 is a block diagram (ii) of the configuration of the apparatus for acquiring the terminal status according to the embodiment of the present invention;

fig. 7 is a block diagram (one) of the structure of the apparatus for indicating the status of a terminal according to the embodiment of the present invention;

fig. 8 is a block diagram (ii) of the structure of the apparatus for indicating the terminal status according to the embodiment of the present invention;

fig. 9 is a flowchart of terminal state transition according to preferred embodiment 1 of the present invention;

fig. 10 is a flowchart of terminal state transition according to preferred embodiment 2 of the present invention;

fig. 11 is a flowchart of terminal state transition according to preferred embodiment 3 of the present invention;

fig. 12 is a flowchart of terminal state transition according to preferred embodiment 4 of the present invention;

fig. 13 is a flowchart of terminal state transition according to preferred embodiment 5 of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the drawings and embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

According to an embodiment of the present invention, an embodiment of a method for acquiring a terminal state is provided, it should be noted that the steps shown in the flowchart of the figure may be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that here.

Fig. 3 is a flowchart of a method for acquiring a terminal status according to an embodiment of the present invention, as shown in fig. 3, including the following steps:

step S302, a terminal receives an indication message sent by a first base station in a first Radio Access Technology (RAT), wherein the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state;

step S304, the terminal acquires a terminal state when the terminal moves from the first RAT to the second RAT according to the cross-RAT indication information, wherein the terminal state includes at least one of the following states: connected state, inactive state, lightly connected state, idle state.

Through the steps, the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT according to the cross-RAT indication information carried in the indication information sent by the first base station, the problems that in the related technology, the service performance cannot be met and the like due to the fact that the terminal state cannot be known after the UE in the non-active state or the light connection state moves across the RATs are solved, and then the terminal can know the terminal state when the UE moves from the first RAT to the second RAT, and the service performance is guaranteed.

In an optional example of this embodiment, the terminal sends a request message to a second base station located in a second RAT, where the request message carries the recovery identifier and the inter-RAT indication information.

Optionally, the method further includes: the terminal sends a connection recovery request message to the first base station or a third base station which is in the same RAT as the first base station, wherein the connection recovery request message at least carries one of the following: and recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell.

Optionally, the signal indication information of the serving cell is used for indicating at least one of the following: the signal strength of the serving cell and the signal quality of the serving cell; the signal indication information of the adjacent area is at least used for indicating one of the following: cell identification of the neighboring cell, signal strength of the neighboring cell, and signal quality of the neighboring cell.

Optionally, the second RAT includes at least one of: the long term evolution mobile communication system LTE, the evolved long term evolution mobile communication system LTE, and the new radio access technology mobile communication system NR, that is, in the embodiment of the present invention, the cross-RAT indication information may indicate the terminal state of the terminal crossing from the first RAT to the long term evolution mobile communication system LTE, or the evolved long term evolution mobile communication system LTE, or the new radio access technology mobile communication system NR, which is not limited in the embodiment of the present invention.

The above embodiment is a description from a terminal side, in the embodiment of the present invention, a technical solution described from a base station side is further provided, fig. 4 is a flowchart of a method for indicating a terminal state according to the embodiment of the present invention, as shown in fig. 4, including the following steps:

step S402, an indication message is sent to a terminal in a connection state, wherein the indication message carries cross-RAT indication information, the cross-RAT indication information is used for indicating a state when the terminal moves from a first RAT to a second RAT, the terminal is in an inactive state or a light connection state, and the terminal state includes at least one of the following states: connected state, inactive state, lightly connected state, idle state.

Through the technical scheme, the base station can send the indication information to the terminal, and then the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT according to the cross-RAT indication information carried in the indication information sent by the first base station, so that the problems that the service performance cannot meet and the like caused by the fact that the terminal state cannot be known after the cross-RAT movement of the UE in the non-active state or the light connection state in the related technology are solved, and then the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT, and the service performance is ensured.

Optionally, the signal indication information of the serving cell is used for indicating at least one of the following: signal strength of the serving cell, signal quality of the serving cell; the signal indication information of the adjacent area is at least used for indicating one of the following: cell identification of the neighbor cell, signal strength of the neighbor cell, and signal quality of the neighbor cell.

The following describes the general flows of the above-mentioned terminal state acquisition method and indication method with reference to an example, and the following example is only for explanation and is not intended to limit the embodiments of the present invention.

The base station sends a message a (which is equivalent to the indication information in the above embodiment, and may be an existing RRC Connection Release message for RRC Connection Release, or a new message, which is not limited in this embodiment of the present invention) to the UE in the Connection state, and the message a carries the recovery identifier and the cross-RAT indication, so that the UE enters the inactive or lightly connected state.

The cross-RAT indication is used to indicate a state (e.g., a connected state, an inactive/or lightly connected state, an idle state) when the UE moves to another RAT, and the cross-RAT indication may include multiple indications, i.e., may indicate states when the UE moves to different RATs such as LTE, NR, etc., respectively.

The UE in the inactive/or light Connection state sends a message B1 (which is equivalent to the Request message in the foregoing embodiment, and may be an existing RRC Connection Request message or a new message) to the base station, where the message B carries the recovery identifier and the cross-RAT indication; or send a message B2 (which may be an existing RRC Connection Resume Request message or a new message) to the base station, where the message carries a Resume identifier, a serving cell signal condition (which may include signal strength, signal quality, and the like), and a neighboring cell signal condition (which may include cell identifiers of one or more neighboring cells and signal strength/signal quality).

After receiving the MESSAGE B1, the base station sends a MESSAGE C (which may be an existing INITIAL UE MESSAGE or a new MESSAGE) to the core network, carrying the recovery identifier received from the MESSAGE B1, and possibly carrying a new recovery identifier generated by the base station.

And after receiving the message B2, the base station determines whether to recover the RRC connection with the UE according to the received signal condition of the serving cell and the signal condition of the adjacent cell.

After receiving the message C, the core network acquires and stores the UE context according to the received recovery identifier; if a new recovery identifier is received, binding the new recovery identifier with the UE context; the core network sends a message D (which may be an existing INITIAL CONTEXT SETUP REQUEST message or a new message) to the base station according to the UE CONTEXT to initiate INITIAL CONTEXT SETUP with the base station.

After receiving the message D, the base station initiates RRC connection establishment with the UE when the cross-RAT indication received from the UE is in a connection state, so that the UE enters the connection state; when the cross-RAT indication received from the UE is in an inactive/light Connection state, the base station sends a message E (which may be an existing RRC Connection rejection RRC Connection Reject message or a new message) to the UE, and carries a new Resume ID and a new cross-RAT indication, so that the UE enters the inactive/light Connection state.

By adopting the technical scheme, the problem of cross-RAT movement of UE in an inactive state under NR and eLTE and UE in a light connection state under LTE is solved, so that the service performance is ensured to be met.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a device for acquiring a terminal state is further provided, which is applied to a terminal, and is used to implement the foregoing embodiment and the preferred example, which have been described above and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 5 is a block diagram (i) of a configuration of an apparatus for acquiring a terminal status according to an embodiment of the present invention, as shown in fig. 5, including:

a first receiving module 50, configured to receive an indication message sent by a base station located in a first radio access technology RAT, where the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state;

an obtaining module 52, configured to obtain a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, where the terminal state includes at least one of: connected state, inactive state, lightly connected state, idle state.

Through the technical scheme, the technical scheme that the state of the terminal when the terminal moves from the first RAT to the second RAT can be known according to the cross-RAT indication information carried in the indication information sent by the first base station is solved, the problems that the service performance cannot meet and the like due to the fact that the state of the terminal cannot be known after the UE in an inactive state or a light connection state moves across the RATs are solved, and then the terminal can know the state of the terminal when the UE moves from the first RAT to the second RAT, and the service performance is guaranteed.

As shown in fig. 6, optionally, the apparatus further includes: a first sending module 54, configured to send a request message to a second base station located in a second RAT, where the request message carries a recovery identifier and the inter-RAT indication information.

Optionally, the apparatus further comprises: a second sending module 56, configured to send a connection resuming request message to a first base station or to a third base station that is in the same RAT as the first base station, where the connection resuming request message at least carries one of the following: and recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell.

Optionally, the signal indication information of the serving cell is at least used for indicating one of the following: signal strength of the serving cell, signal quality of the serving cell; the signal indication information of the neighboring cell is at least used for indicating one of the following: the cell identifier of the neighboring cell, the signal strength of the neighboring cell, and the signal quality of the neighboring cell.

In this embodiment, an indication apparatus of a terminal status is further provided, and the apparatus is used to implement the foregoing embodiments and preferred examples, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 7 is a block diagram (a) of a configuration of an apparatus for indicating a terminal status according to an embodiment of the present invention, as shown in fig. 7, including:

a third sending module 70, configured to send an indication message to a terminal in a connected state, where the indication message carries cross-RAT indication information, the cross-RAT indication information is used to indicate a state when the terminal moves from a first RAT to a second RAT, and the terminal is in an inactive state or a lightly connected state, where the terminal state includes: connected state, inactive state, lightly connected state, idle state.

Through the technical scheme, the indication information is sent to the terminal, and then the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT according to the cross-RAT indication information carried in the indication information sent by the first base station, so that the problems that the service performance cannot meet and the like caused by the fact that the terminal state cannot be known after the cross-RAT movement of the UE in the non-active state or the light connection state in the related technology are solved, and then the terminal can know the terminal state when the terminal moves from the first RAT to the second RAT, and the service performance is ensured.

As shown in fig. 8, the above apparatus further includes: a second receiving module 72, configured to receive a connection recovery request message sent by the terminal, where the connection recovery request message at least carries one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell; and the determining module is used for determining whether to recover the connection with the terminal according to the received connection recovery request message.

In order to better understand the above-mentioned acquisition and indication process of the terminal status, the following describes the above-mentioned technical solutions with reference to a plurality of preferred embodiments.

Preferred embodiment 1

Fig. 9 is a flowchart of terminal state transition according to preferred embodiment 1 of the present invention, and as shown in fig. 9, a UE moves from an inactive state under a gNB to an lte eNB to enter a connected state in a 5G system, including the following steps:

step S902, a connection state of the 5G base station gNB at the UE.

Step S904, the gNB sends a UE context suspend request to the core network, carrying a Resume ID (Resume ID).

Step S906, the core network reserves the UE Context of the UE, binds the received Resume ID with the UE Context, and sends a UE Context suspension response to the gNB.

Step S908, the gNB controls the UE to enter an Inactive (Inactive) state, and the gNB sends an RRC connection release message to the UE, carrying the Resume ID and the cross-RAT indication (setting the indication as a connected state).

Step S910, after receiving the RRC connection release message, the UE enters an Inactive state according to the carried Resume ID, and stores the received Resume ID and the cross-RAT indication.

Step S912, the current service cell signal of the UE is changed, the UE reselects the cell of the eLTE eNB, the UE is in a connection state according to the cross-RAT indication stored before, and the UE sends an RRC connection request to the eLTE eNB, wherein the RRC connection request carries the Resume ID and the cross-RAT indication.

Step S914, the eLTE eNB sends RRC connection establishment to the UE according to the received cross-RAT indication as a connection state.

Step S916, the UE completes RRC connection establishment and sends RRC connection establishment completion to the lte eNB.

Step S918, the lte eNB sends an initial UE message to the core network, carrying the Resume ID.

Step S920, the core network sends a UE context release command to the corresponding gNB according to the received Resume ID, and the UE context release command carries the Resume ID.

Step S922, the gNB releases the corresponding UE Context according to the received Resume ID, and the gNB sends a UE Context release completion message to the core network.

Step S924, the core network acquires the UE Context stored before according to the received Resume ID, and the core network sends an initial Context setup request to the lte eNB, where the initial Context setup request carries the UE Context (including Flow, qoS, UE capability, security, and other related information).

Step S926, the lte eNB sends an RRC connection reconfiguration to the UE according to the cross-RAT indication as a connection state and the received UE Context.

Step S928, the UE completes RRC connection reconfiguration, and the UE enters a connection state under eLTE eNB.

Step S930, the UE sends an RRC connection reconfiguration complete message to the lte eNB.

Step S932, the lte eNB sends an initial context setup complete message to the core network.

Preferred embodiment 2

Fig. 10 is a flowchart of terminal state transition according to preferred embodiment 2 of the present invention, as shown in fig. 10, a UE moves from an inactive state under a gNB to an lte eNB and still enters an inactive state in a 5G system, as shown in fig. 10, including the following steps:

step S1002, the UE is in a connection state under the 5G base station gNB.

Step S1004, the gNB sends a UE context suspension request to the core network, carrying a Resume ID (Resume ID).

Step S1006, the core network reserves the UE Context of the UE, binds the received Resume ID with the UE Context, and the core network sends a UE Context suspension response to the gNB.

Step S1008, the gbb controls the UE to enter an Inactive (Inactive) state, and the gbb sends an RRC connection release message to the UE, carrying the Resume ID and the inter-RAT indication (the indication is set to the Inactive state).

Step S1010, after receiving the RRC connection release message, the UE enters an inactive state according to the carried Resume ID, and stores the received Resume ID and the cross-RAT indication.

And step S1012, the current serving cell signal of the UE is worsened, the UE reselects the cell of the eLTE eNB, the UE is in an Inactive state according to the previously stored cross-RAT indication, and the UE sends an RRC connection request to the eLTE eNB, wherein the RRC connection request carries the Resume ID and the cross-RAT indication.

Step S1014, the eLTE eNB sends an initial UE message to the core network, wherein the initial UE message carries the Resume ID and the new Resume ID.

Step S1016, the core network sends a UE context release command to the corresponding gNB according to the received Resume ID, and the UE context release command carries the Resume ID.

Step S1018, the gNB releases the corresponding UE Context according to the received Resume ID, and the gNB sends a UE Context release completion message to the core network.

Step S1020, the core network obtains the UE Context stored before according to the received Resume ID, binds the UE Context with the received new Resume ID, and sends an initial Context setup request to the lte eNB, where the initial Context setup request carries the UE Context (including Flow, qoS, UE capability, security, and other related information).

Step S1022, the lte eNB sends an initial context setup complete message to the core network.

Step S1024, eLTE eNB sends RRC connection rejection message to UE, and the RRC connection rejection message carries new Resume ID and new cross-RAT indication.

Step S1026, the UE enters an Inactive state under eLTE eNB.

Preferred embodiment 3

Fig. 11 is a flowchart of terminal state transition according to preferred embodiment 3 of the present invention, and as shown in fig. 11, a UE moves from an inactive state in a 5G system gNB to a connected state in a 4G system eNB, including the following steps:

step S1102, a connection state of the 5G base station gNB at the UE.

Step S1104, the gNB sends a UE context suspend request to the 5G core network, carrying a Resume ID (Resume ID).

Step S1106, the 5G core network reserves the UE Context of the UE, binds the received Resume ID with the UE Context, and the 5G core network sends a UE Context suspension response to the gNB.

Step S1108, the gNB controls the UE to enter an Inactive (Inactive) state, and the gNB sends an RRC connection release message to the UE, carrying the Resume ID and the cross-RAT indication (setting the indication as a connected state).

Step S1110, after receiving the RRC connection release message, the UE enters an Inactive state according to the result ID carried in the RRC connection release message, and stores the received result ID and the inter-RAT indication.

Step S1112, the current serving cell signal of the UE is degraded, the UE reselects to the cell of the LTE eNB, the UE is in a connection state according to the previously stored cross-RAT indication, and the UE sends an RRC connection request to the eNB, carrying the Resume ID and the cross-RAT indication.

Step S1114, the eNB sends an initial UE message to the 4G core network, carrying the Resume ID.

And S1116, the 4G core network sends a UE context acquisition request message to the 5G core network according to the received Resume ID, and the UE context acquisition request message carries the Resume ID.

Step S1118, 5G, the core network sends a UE context release command to the corresponding gNB according to the received Resume ID, and the UE context release command carries the Resume ID.

Step S1120, the gNB releases the corresponding UE Context according to the received Resume ID, and the gNB sends a UE Context release completion message to the 5G core network.

Step S1122, the 5G core network obtains the UE Context (including Flow, qoS corresponding to Flow, UE capability, security, and other related information) stored before according to the received Resume ID, the 5G core network maps the UE Context to the UE Context that the 4G core network can understand, and the 5G core network sends a UE Context obtaining response message to the 4G core network, carrying the mapped UE Context (including bearer, qoS corresponding to bearer, UE capability, security, and other related information).

Step S1124, the 4G core network sends an initial Context setup request to the eNB according to the received UE Context, and carries the UE Context (including the bearer, qoS corresponding to the bearer, UE capability, security, and other related information).

Step S1126, the eNB sends RRC connection establishment to the UE according to the received cross-RAT indication as a connection state and the received UE Context.

Step S1128, the UE completes RRC connection establishment, and the UE enters a connection state under the eNB.

Step S1130, the UE sends an RRC connection setup complete to the eNB.

Step S1132, the eNB sends an initial context setup complete message to the 4G core network.

Preferred embodiment 4

Fig. 12 is a flowchart of terminal state transition according to preferred embodiment 4 of the present invention, and as shown in fig. 12, a UE moves from an inactive state in a 5G system gNB to a light connection state in a 4G system eNB, including the following steps:

step S1202, the UE is in a connection state with the 5G base station gNB.

Step S1204, the gNB sends a UE context suspension request to the 5G core network, carrying a Resume ID (Resume ID).

Step S1206, the 5G core network reserves the UE Context of the UE, binds the received Resume ID with the UE Context, and the 5G core network sends a UE Context suspension response to the gNB.

Step S1208, the gNB controls the UE to enter an Inactive (Inactive) state, and the gNB sends an RRC Connection release message to the UE, carrying the Resume ID and the cross-RAT indication (the indication is set to be a Light Connection state).

Step S1210, after receiving the RRC connection release message, the UE enters an Inactive state according to the carried Resume ID, and stores the received Resume ID and the cross-RAT indication.

And step S1212, the UE reselects to a cell of the LTE eNB when the current serving cell signal of the UE is poor, the UE is in a Light Connection state according to the previously stored cross-RAT indication, and the UE sends an RRC Connection request to the eNB, wherein the RRC Connection request carries the Resume ID and the cross-RAT indication.

Step S1214, the eNB sends an initial UE message to the 4G core network, carrying the Resume ID and the new Resume ID.

Step S1216, the 4G core network sends a UE context acquisition request message to the 5G core network according to the received Resume ID, where the UE context acquisition request message carries the Resume ID.

Step S1218, the 5G core network sends a UE context release command to the corresponding gNB according to the received Resume ID, and the command carries the Resume ID.

Step S1220, the gNB releases the corresponding UE Context according to the received Resume ID, and the gNB sends a UE Context release completion message to the 5G core network.

Step S1222, the 5G core network obtains the UE Context (including Flow, qoS corresponding to Flow, UE capability, security, and other related information) stored before according to the received Resume ID, the 5G core network maps the UE Context to the UE Context that the 4G core network can understand, the 5G core network sends a UE Context obtaining response message to the 4G core network, and the mapped UE Context (including bearer, qoS corresponding to bearer, UE capability, security, and other related information) is carried.

Step S1224, the 4G core network stores the received UE Context and binds the received UE Context ID with the received new Resume ID, and the 4G core network sends an initial Context setup request to the eNB according to the UE Context, where the initial Context setup request carries the UE Context (including relevant information such as bearer, qoS corresponding to the bearer, UE capability, security, and the like).

Step S1226, the eNB sends an initial context setup complete message to the 4G core network.

Step S1228, the eNB sends an RRC Connection reject message to the UE according to that the received cross-RAT indication is a Light Connection state, and carries the new Resume ID and the new cross-RAT indication.

Step S1230, the UE enters a Light Connection state under the eNB.

Preferred embodiment 5

Fig. 13 is a flowchart of terminal state transition according to preferred embodiment 5 of the present invention, and as shown in fig. 13, a UE moves from an inactive state under a gNB to an lte eNB to enter a connected state in a 5G system, including the following steps:

step S1302, the UE is in a connection state with the 5G base station gNB.

Step S1304, the gNB controls the UE to enter an Inactive (Inactive) state, and the gNB sends an RRC connection release message to the UE, carrying the Resume ID and the cross-RAT indication (setting the indication as a connected state).

Step 1306, after receiving the RRC connection release message, the UE enters an Inactive state according to the result ID carried with the RRC connection release message, and stores the received result ID and the inter-RAT indication.

Step S1308, the current serving cell signal of the UE has a trend of being degraded (but may also be used), and an lte neighbor cell signal is better, and the UE sends an RRC connection recovery request to the gNB according to the cross-RAT indication saved before as a connection state, and carries the Resume ID, the serving cell signal condition, and the lte neighbor cell signal condition.

Step S1310, the gNB determines to recover the RRC connection of the UE according to the received serving cell signal condition and the lte neighbor cell signal condition, and the gNB sends an RRC connection recovery message to the UE. In order to serve the burst traffic in a timely manner.

Step S1312, the UE completes RRC connection recovery and sends an RRC connection recovery complete message to the gNB.

Step S1314, the UE enters a connected state under the gNB.

Step S1316, the gNB initiates a cross-RAT handover procedure from NR to lte.

Step 1318, the UE enters a connected state under the lte eNB.

Example 3

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the storage medium may be configured to store a program code executed by the method for acquiring a terminal state provided in the first embodiment.

Optionally, in this embodiment, the storage medium may be located in any one of computer terminals in a computer terminal group in a computer network, or in any one of mobile terminals in a mobile terminal group.

Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:

s1, a terminal receives an indication message sent by a first base station of a first Radio Access Technology (RAT), wherein the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state;

s2, the terminal acquires a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, wherein the terminal state comprises at least one of the following states: connected state, inactive state, lightly connected state, idle state.

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the storage medium may be configured to store a program code executed by the method for indicating a terminal state provided in the first embodiment.

the method includes the steps that S1, an indication message is sent to a terminal in a connection state, wherein the indication message carries cross-RAT indication information, the indication message is used for indicating a state when the terminal moves from a first RAT to a second RAT, the terminal is in an inactive state or a light connection state, and the terminal state comprises at least one of the following states: connected state, inactive state, lightly connected state, idle state.

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

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

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

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for acquiring a terminal state is characterized by comprising the following steps:

a terminal receives an indication message sent by a first base station located in a first Radio Access Technology (RAT), wherein the indication message carries cross-RAT indication information, and the terminal is in an inactive state or a light connection state;

the terminal acquires a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, wherein the terminal state comprises at least one of the following states: a connected state, an inactive state, a light connected state, an idle state;

the terminal sends a connection recovery request message to the first base station or a third base station which is in the same RAT as the first base station, wherein the connection recovery request message at least carries one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell;

wherein the cross-RAT indication information is used for indicating the state when the UE moves to another RAT, and the cross-RAT indication information comprises a plurality of indications, and the plurality of indications comprise at least one of the following: an indication corresponding to a state when moving to the RAT of the long term evolution mobile communication system LTE, an indication corresponding to a state when moving to the RAT of the evolved long term evolution mobile communication system etle, and an indication corresponding to a state when moving to the RAT of the new radio access technology mobile communication system NR.

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein the signal indication information of the serving cell is used for indicating at least one of: signal strength of the serving cell, signal quality of the serving cell; the signal indication information of the neighboring cell is at least used for indicating one of the following: the cell identification of the neighboring cell, the signal strength of the neighboring cell, and the signal quality of the neighboring cell.

4. The method according to any one of claims 1 to 3,

the second RAT includes at least one of: a long term evolution mobile communication system LTE, an evolved long term evolution mobile communication system LTE, a new radio access technology mobile communication system NR.

5. A method for indicating a terminal state is characterized by comprising the following steps:

sending an indication message to a terminal in a connected state, wherein the indication message carries cross-RAT indication information, the cross-RAT indication information is used for indicating a state when the terminal moves from a first RAT to a second RAT, the terminal is in an inactive state or a light connected state, and the terminal state includes at least one of the following: a connected state, an inactive state, a light connected state, an idle state;

receiving a connection recovery request message sent by the terminal, wherein the connection recovery request message at least carries one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell;

determining whether to recover the connection with the terminal according to the received connection recovery request message;

wherein the cross-RAT indication information is used for indicating a state when the UE moves to another RAT, and the cross-RAT indication information comprises a plurality of indications, and the plurality of indications comprise at least one of the following: an indication corresponding to a state when moving to the RAT of the long term evolution mobile communication system LTE, an indication corresponding to a state when moving to the RAT of the evolved long term evolution mobile communication system etle, and an indication corresponding to a state when moving to the RAT of the new radio access technology mobile communication system NR.

6. The method of claim 5,

the signal indication information of the serving cell is used for indicating at least one of the following: signal strength of the serving cell, signal quality of the serving cell;

7. The method according to any one of claims 5 to 6,

the second RAT comprises at least one of: a long term evolution mobile communication system LTE, an evolved long term evolution mobile communication system LTE, a new radio access technology mobile communication system NR.

8. An apparatus for acquiring a terminal status is applied to a terminal, and comprises:

a first receiving module, configured to receive an indication message sent by a base station in a first radio access technology RAT, where the indication message carries RAT crossing indication information, and the terminal is in an inactive state or a light connection state;

an obtaining module, configured to obtain a terminal state when the terminal moves from a first RAT to a second RAT according to the cross-RAT indication information, where the terminal state includes at least one of: a connected state, an inactive state, a light connected state, an idle state;

a second sending module, configured to send a connection recovery request message to a first base station or to a third base station that is in the same RAT as the first base station, where the connection recovery request message at least carries one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell;

9. The apparatus of claim 8, further comprising:

a first sending module, configured to send a request message to a second base station located in a second RAT, where the request message carries a recovery identifier and the inter-RAT indication information.

10. The apparatus of claim 8, wherein the signal indication information of the serving cell is at least used for indicating one of: signal strength of the serving cell, signal quality of the serving cell; the signal indication information of the neighboring cell is at least used for indicating one of the following: the cell identification of the neighboring cell, the signal strength of the neighboring cell, and the signal quality of the neighboring cell.

11. An apparatus for indicating a status of a terminal, comprising:

a third sending module, configured to send an indication message to a terminal in a connected state, where the indication message carries cross-RAT indication information, where the cross-RAT indication information is used to indicate a state when the terminal moves from a first RAT to a second RAT, and the terminal is in an inactive state or a light connected state, where the terminal state includes: a connected state, an inactive state, a light connected state, an idle state;

a second receiving module, configured to receive a connection recovery request message sent by the terminal, where the connection recovery request message carries at least one of the following: recovering the identifier, the signal indication information of the serving cell and the signal indication information of the adjacent cell;

a determining module, configured to determine whether to resume the connection with the terminal according to the received connection resumption request message;

12. The apparatus of claim 11,

the signal indication information of the serving cell is at least used for indicating one of the following: signal strength of the serving cell, signal quality of the serving cell;