CN113498221B

CN113498221B - Method for performing state transition on non-active UE, user terminal and network equipment

Info

Publication number: CN113498221B
Application number: CN202010256391.9A
Authority: CN
Inventors: 许萌; 傅婧; 梁靖
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2024-04-26
Anticipated expiration: 2040-04-02
Also published as: CN113498221A; WO2021197102A1

Abstract

The invention provides a method for carrying out state transition on non-activated UE, a user terminal and network side equipment, comprising the following steps: receiving user plane data transmitted by the UE in an inactive state; and when the UE is determined to be triggered to perform state transition, sending indication information of state transition to the UE so as to indicate the UE to perform state transition. The invention can solve the problem of how the UE performs state transition in the small data transmission scheme of w/o RRC SIGNALLING by directly sending the indication information for indicating the UE to perform state transition to the UE by the network side.

Description

Method for performing state transition on non-active UE, user terminal and network equipment

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method for performing state transition by using an inactive UE, a user terminal, and a network side device.

Background

The NR R17 introduces a small data transmission scheme, that is, when the UE (User Equipment) is in an RRC (Radio Resource Control ) inactive state (RRC INACTIVE), if the UE has small data to send, the UE will complete the small data sending in the RRC inactive state, so that the UE can be prevented from frequently entering the RRC connected state, and signaling overhead is reduced.

In the existing small data transmission scheme, the UE sends small data in the RRC inactive state in two ways, including small data transmission accompanied by RRC SIGNALING (RRC signaling) transmission and small data transmission not accompanied by RRC SIGNALING (i.e., w/o RRC SIGNALING) signaling transmission. When small data transmission accompanied by RRC SIGNALING is used, the UE random access process sends an RRC resume request message and a small data packet to be transmitted to a network side, and the network side can search the context of the UE according to the received RRC resume request message and further instruct the UE to enter a connection state, an idle state or an inactive state; when the small data transmitted by using the w/o RRC SIGNALING is transmitted, that is, the UE in the inactive state sends the small data packet to be transmitted for the first time, no extra RRC signaling is carried.

For the current w/o RRC SIGNALING small data transmission scheme, since the transmission process is not accompanied with RRC signaling, and the state of the UE entering the connected state in the current technology is that the network side instructs the UE to enter the connected state or the idle state through the RRC process, how the UE performs state transition in the w/o RRC SIGNALLING small data transmission scheme has not been specified yet.

Disclosure of Invention

The invention provides a method for performing state transition on non-active state UE, a user terminal and network side equipment, which are used for solving the problem that how to perform state transition on the UE in a small data transmission scheme of w/o RRC SIGNALLING is not provided with a specific scheme.

According to a first aspect of an embodiment of the present application, there is provided a method for indicating an inactive state user equipment UE to perform state transition, the method including:

Receiving user plane data transmitted by the UE in an inactive state;

And when the UE is determined to be triggered to perform state transition, sending indication information of the state transition to the UE so as to indicate the UE to recover the radio resource bearer SRB or enter a connection state or enter an idle state.

Optionally, receiving the user plane data transmitted by the inactive UE includes:

receiving data which is transmitted by the non-activated UE and does not accompany RRC signaling transmission; and/or

And receiving user plane data transmitted by the UE in an inactive state, wherein RRC signaling transmitted by the UE is not received before the user plane data is received.

Optionally, sending indication information of state transition to the UE to instruct the UE to recover the radio resource bearer SRB or enter a connected state or enter an idle state, including one or a combination of the following:

transmitting indication information carrying state transition of the identification of the UE in a resident cell to the UE through Radio Resource Control (RRC) signaling so as to indicate the UE to enter a connection state; or (b)

Transmitting indication information carrying state transition of the UE in a resident cell identifier to the UE through a physical downlink control channel PDCCH so as to indicate the UE to enter a connection state; or (b)

Transmitting indication information carrying state transition of the UE in a resident cell identifier to the UE through a Media Access Control (MAC) message so as to indicate the UE to enter a connected state; or (b)

Transmitting indication information of state transition to the UE through RRC signaling to indicate the UE to enter a connection state or an idle state; or (b)

Transmitting indication information of state transition to the UE through a PDCCH (physical downlink control channel) to indicate the UE to recover a radio resource bearer SRB or enter a connection state or enter an idle state; or (b)

And sending indication information of state transition to the UE through the MAC message so as to indicate the UE to recover the radio resource bearer SRB or enter a connection state or enter an idle state.

Optionally, sending indication information of state transition to the UE includes:

The message B MSGB or the message 4MSG4 in the random access process carries indication information for indicating the state transition of the UE.

and sending the indication information or sending the scheduling information of the indication information through a preset PDCCH scrambled by a preset radio network temporary identifier RNTI.

Optionally, before or after sending the indication information, at least one of the following steps is performed:

A packet data convergence protocol PDCP entity reconstructing a first signaling radio bearer, SRB1, interacting with the UE and/or a PDCP entity reconstructing SRB 2;

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

According to a second aspect of an embodiment of the present application, there is provided a method for performing state transition by a user equipment UE in an inactive state, the method including:

Transmitting user plane data to a network side;

When the receiving network side determines to trigger the UE to perform state transition, the receiving network side sends the indication information of state transition, and recovers the radio resource bearer SRB or enters a connection state or enters an idle state according to the indication information.

Optionally, transmitting user plane data to a network side includes:

Transmitting data to the network side without accompanying RRC signaling transmission, and/or

And transmitting the user plane data to a network side, wherein the RRC signaling is not transmitted to the network side before the user plane data is transmitted.

Optionally, when the receiving network side determines to trigger to instruct the UE to perform state transition, the sent indication information of state transition includes one or a combination of the following:

When the receiving network side determines to trigger and instruct the UE to perform state transition, the receiving network side enters a connection state through indication information which is sent by Radio Resource Control (RRC) signaling and carries the identification of the UE in a resident cell; or (b)

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information carrying the identification of the UE in the resident cell and sent by a physical downlink control channel PDCCH enters a connection state, or a radio resource bearer SRB is restored to enter the connection state; or (b)

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information carrying the identification of the UE in the resident cell and sent by the Media Access Control (MAC) message enters a connection state, or a radio resource bearer (SRB) is restored to enter the connection state; or (b)

When the receiving network side determines to trigger the UE to perform state transition, the receiving network side sends the state transition indication information through RRC signaling and enters a connection state or an idle state; or (b)

When the receiving network side determines to trigger the UE to perform state transition, the receiving network side resumes the wireless resource bearer SRB to enter a connection state or enter an idle state through the indication information of the state transition sent by the PDCCH; or (b)

When the receiving network side determines to trigger the UE to perform state transition, the receiving network side returns the indication information of the state transition sent by the MAC message and restores the radio resource bearer SRB to enter a connection state or enter an idle state.

Optionally, when the receiving network side triggers to instruct the UE to perform state transition, the sent indication information of state transition includes:

the receiving network side carries indication information for indicating to perform state transition through a message B MSGB or a message 4MSG4 in the random access process.

Optionally, when the receiving network side determines to trigger to instruct the UE to perform state transition, the sent indication information of state transition includes:

And the UE monitors a preset PDCCH scrambled by a preset radio network temporary identifier RNTI.

Optionally, before the receiving network side determines the sent indication information for indicating the state transition of the UE when the receiving network side triggers the UE to perform the state transition, or after the UE is indicated to be in a connected state according to the indication information, at least one step of:

a default configuration of the first signaling radio bearer SRB1 and/or a default configuration of the second signaling radio bearer SRB2 specified in the application protocol;

A packet data convergence protocol PDCP entity that re-establishes SRB1 and/or a PDCP entity that re-establishes SRB 2;

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

Optionally, after the UE is instructed to switch to the connected state according to the instruction information, at least one step of:

Deleting the stored UE non-activated state context;

Taking a preset Radio Network Temporary Identifier (RNTI) as a UE identifier interacted with a network side, wherein the preset RNTI is an RNTI used when monitoring a preset PDCCH when receiving the indication information;

Taking a UE identifier used before entering an inactive state as the UE identifier of the UE in the cell;

and taking the UE identification pre-configured by the network side as the UE identification of the UE in the cell after entering the connection state.

Optionally, transmitting user plane data to a network side includes:

transmitting user plane data to a network side through uplink resources preconfigured by a resident cell; or (b)

And transmitting the user plane data to the network side through the non-bidding random access resource distributed by the resident cell.

According to a third aspect of an embodiment of the present application, there is provided a network side device for indicating an inactive UE to perform a state transition, including: a memory, a processor, the memory storing a computer program;

The processor is configured to read a program in the memory and execute:

Receiving user plane data transmitted by the UE in an inactive state;

Optionally, the processor is configured to receive user plane data transmitted by the UE in an inactive state, specifically configured to:

Optionally, the processor is configured to send, to the UE, indication information of a state transition to instruct the UE to recover the radio resource bearer SRB or enter a connected state or enter an idle state, including one or a combination of the following:

Optionally, the processor is configured to send indication information of state transition to the UE, specifically configured to:

Optionally, the processor is configured to perform at least one of the following steps before sending the indication information or after sending the indication information:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

According to a fourth aspect of an embodiment of the present application, there is provided a user terminal for performing state transition by a user equipment UE in an inactive state, including: a memory, a processor, the memory storing a computer program;

The processor is configured to read a program in the memory and execute:

Transmitting user plane data to a network side;

Optionally, the processor is configured to transmit user plane data to a network side, specifically configured to:

Optionally, the processor is configured to receive, when the network side determines to trigger to instruct the UE to perform state transition, sent indication information of state transition, where the indication information includes one or a combination of the following:

Optionally, the processor is configured to receive indication information sent by the network side when the network side triggers to instruct the UE to perform state transition, and specifically is configured to:

Optionally, the processor is configured to receive indication information sent by the network side when determining to trigger to instruct the UE to perform state transition, and specifically is configured to:

Optionally, before receiving the indication information of the state transition sent when the network side determines to trigger to instruct the UE to perform the state transition, or after instructing the UE to transition to the connection state according to the indication information, the method further includes executing at least one step as follows:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

Optionally, the processor is configured to perform at least one of the following steps after instructing, according to the instruction information, the UE to switch to the connected state:

Deleting the stored UE non-activated state context;

According to a fifth aspect of an embodiment of the present application, there is provided a network side device for indicating a state transition of an inactive UE, the network side device including:

A receiving unit, configured to receive user plane data transmitted by an inactive UE;

and the first conversion unit is used for sending the indication information of the state conversion to the UE when the UE is triggered to carry out the state conversion, so as to indicate the UE to recover the radio resource bearer SRB or enter a connection state or enter an idle state.

According to a sixth aspect of an embodiment of the present application, there is provided a user terminal for performing state transition by an inactive UE, the user terminal including:

a transmission unit, configured to transmit user plane data to a network side;

And the second conversion unit is used for receiving the indication information of the state conversion sent by the network side when determining to trigger the UE to perform the state conversion, and recovering the radio resource bearer SRB or entering a connection state or entering an idle state according to the indication information.

According to a seventh aspect of embodiments of the present application, there is provided a chip coupled to a memory in a user equipment, such that the chip, when running, invokes program instructions stored in the memory, implementing the above aspects of embodiments of the present application and any possible related methods related to the aspects.

According to an eighth aspect of embodiments of the present application there is provided a computer readable storage medium storing program instructions that when run on a computer cause the computer to perform the aspects of embodiments of the present application described above and any of the methods that the aspects relate to.

According to a ninth aspect of embodiments of the present application, there is provided a computer program product which, when run on an electronic device, causes the electronic device to perform any one of the possible ways of implementing the above aspects of embodiments of the present application and related thereto.

In addition, the technical effects caused by any implementation manner of the second aspect to the ninth aspect may refer to the technical effects caused by different implementation manners of the first aspect, which are not described herein.

The method for carrying out state transition by the non-active state UE, the user terminal and the network side equipment provided by the invention have the following beneficial effects:

The method for performing state transition by the non-active state UE, the user terminal and the network side equipment provided by the invention can provide a specific scheme for recovering SRB or entering a connection state or entering an idle state by the UE in the small data transmission scheme of w/o RRC SIGNALLING by directly sending the indication information for indicating the UE to perform state transition to the UE by the network side, and solve the problem that the UE cannot perform state transition in the small data transmission of w/o RRC SIGNALLING.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a state transition system of an inactive UE according to an embodiment of the present invention;

Fig. 2 is a schematic flow chart diagram of a method for performing state transition by an inactive UE according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a method for performing state transition by using an inactive UE according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a method for performing state transition by using an inactive UE according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a method for performing state transition by using an inactive UE according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a method for performing state transition by using an inactive UE according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a method for performing state transition by using an inactive UE according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a method for performing state transition by an inactive UE according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of a method for performing state transition by an inactive UE according to an embodiment of the present invention;

Fig. 10 is a schematic diagram of a network side device for indicating an inactive UE to perform state transition according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a UE performing state transition in an inactive state according to an embodiment of the present invention;

Fig. 12 is a schematic diagram of a network side device for indicating a UE in an inactive state to perform state transition according to an embodiment of the present invention;

Fig. 13 is a schematic diagram of a UE performing state transition in an inactive state according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the embodiment of the invention, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The application scenario described in the embodiment of the present invention is for more clearly describing the technical solution of the embodiment of the present invention, and does not constitute a limitation on the technical solution provided by the embodiment of the present invention, and as a person of ordinary skill in the art can know that the technical solution provided by the embodiment of the present invention is applicable to similar technical problems as the new application scenario appears. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

The NR system has designed 3 RRC states: an IDLE (rrc_idle) state, a CONNECTED (rrc_connected) state, and an INACTIVE (rrc_inactive) state. In the RRC inactive state, the non-access stratum (NAS) state of the UE remains in the connected state, but the air interface connection corresponding to the Access Stratum (AS) of the UE is temporarily suspended. Because the UE side and the RAN (radio access network) side both store the AS layer context in the inactive state of the UE, the inactive state UE can perform related connection operation based on the AS layer context in the inactive state of the UE in the process of recovering the connection with the air interface of the RAN side, so that signaling interaction can be effectively reduced, and the UE can quickly enter the connection state.

The UE entering the connected state from the inactive state is completed through an RRC resume (RRC resume) procedure, and a specific procedure for entering the connected state by the inactive state UE is as follows:

Firstly triggering a random access process, sending an RRC resume request message to a network side by a UE, specifically, requesting the network to recover the RRC connection of the UE by carrying the RRC resume request message through an MSG3, wherein the RRC resume request message also comprises a UE identifier of an inactive state of the UE, so that the network side can acquire the context of the UE through the UE identifier, and notifying the UE to enter a connection state by carrying the RRC resume message in an MSG 4. And the UE sends an MSG5 message carrying the RRC resume completion message to the network side to complete the RRC resume process.

The network side informs the UE to enter the idle state from the inactive state through RRC RELEASE information, in the process that the network determines that the inactive state UE enters the idle state, MSG4 carrying RRC RELEASE information is sent to the UE in the random access process triggered by the UE, and when the fact that the information does not carry configuration information for indicating the UE to enter the inactive state is determined, the UE is informed to enter the idle state, or RRC RELEASE information which does not carry configuration information for entering the inactive state is sent after the UE enters the connected state, the UE is informed to enter the idle state.

In the existing small data transmission scheme, the UE sends small data in the RRC inactive state in two manners, including a small data transmission manner accompanied by RRC SIGNALING transmission and a small data transmission manner not accompanied by RRC SIGNALING (i.e., w/o RRC SIGNALING) transmission. Along with the small data transmission process of RRC SIGNALING transmission, the UE triggers a random access process, an RRC resume request message and a small data packet to be transmitted are sent to a network side, and the network side can obtain the context of the UE according to the received RRC resume request message and further instruct the UE to enter a connection state, an idle state or an inactive state; when the small data transmission scheme of w/o RRC SIGNALING transmission is used, that is, the UE sends the small data packet to be transmitted for the first time, no additional RRC message is carried.

For the current w/o RRC SIGNALING small data transmission scheme, since the transmission process is not accompanied with RRC signaling transmission, and the state of the UE entering the connected state in the current technology is that the network side instructs the UE to enter the connected state or the idle state through the RRC process, how the UE performs state transition in the w/o RRC SIGNALLING small data transmission scheme has no specific scheme yet.

Based on the above problems, an embodiment of the present application provides a method for performing state transition by a UE in an inactive state, so as to solve the above problems. The following describes specific embodiments of the present application with reference to the drawings.

Example 1

In the description process, the state transition system is respectively described from the implementation of the terminal and the network side for the user equipment UE in the inactive state, and then an example of the implementation of the two in cooperation is also given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented cooperatively or separately, and in fact, when the terminal is implemented separately from the network, the problems of the terminal side and the network side are solved, respectively, and when the two are used in combination, a better technical effect is obtained.

As shown in fig. 1, a system for performing state transition for an inactive UE according to an embodiment of the present application includes:

A user terminal UE101, configured to transmit user plane data to a network side; when the receiving network side determines to trigger the UE to perform state transition, sending state transition indication information, and recovering a radio resource bearer SRB or entering a connection state or entering an idle state according to the indication information;

Network side equipment 102, configured to receive user plane data transmitted by an inactive UE; and when the UE is determined to be triggered to perform state transition, sending indication information of the state transition to the UE so as to indicate the UE to recover the radio resource bearer SRB or enter a connection state or enter an idle state.

In the prior art, the state transition of the UE is that the network side device instructs the UE to enter a connection state or an idle state through an RRC procedure, but for how the UE performs the state transition without using RRC signaling, there is no clear scheme at present, for example, in the current small data transmission scheme, since the transmission process is not accompanied by RRC signaling in the current small data transmission scheme, the network side device instructs the UE to enter the connection state or the idle state through the RRC procedure in the state transition of the UE in the current state, so how the UE performs the state transition in the small data transmission scheme of w/o RRC SIGNALLING has not been specifically configured.

Optionally, the UE may send the UE user plane data to the network side, which may include, but is not limited to, the small data mentioned in the embodiment of the present application, where the small data sent to the network side by the UE is small data that is not accompanied by RRC signaling transmission, and no additional RRC message is carried except for a small data packet to be transmitted, and optionally, the UE transmits the UE user plane data to the network side, and does not transmit RRC signaling to the network side before transmitting the UE user plane data.

Optionally, in the process of restoring connection with the RAN side air interface, the UE in the inactive state may perform related connection operation based on the context of the AS layer in the inactive state of the UE, so AS to effectively reduce signaling interaction, and enable the UE to enter the connection state quickly.

In the prior art, the UE needs to send RRC signaling to the network side device when establishing connection between the UE and the network side device, and the UE performs state transition, such as entering a connection state from an inactive state or entering an idle state from an inactive state, and needs to determine whether to enter the connection state or the idle state according to a response message sent by the received network side device after sending the RRC signaling to the network side device.

As an optional implementation manner, when no data of the UE is received, if it is determined that the UE is triggered to perform state transition, the network side device may directly send the indication information to the inactive UE to indicate that the UE transitions from the inactive state to the active state or from the inactive state to the idle state.

After receiving user plane data sent by a user terminal, the network side device sends indication information of state transition to the user terminal when determining to trigger the user terminal to perform state transition, optionally, the indication information can be transmitted through RRC signaling, MAC CE or PDCCH, for example, if a radio resource bearer SRB is restored between the network side and the UE, including but not limited to sending the indication information of state transition to the UE through radio resource control RRC signaling, so as to instruct the UE to perform state transition, or sending the indication information of state transition to the UE through a physical downlink control channel PDCCH, so as to instruct the UE to perform state transition, or sending the indication information of state transition to the UE through a media access control MAC message, so as to instruct the UE to perform state transition.

Specifically, the network side sends the indication information of state transition to the UE, or when the network side received by the UE determines to trigger the UE to perform state transition, the sent indication information of state transition includes at least one of the following:

When the indication information indicates that the inactive UE is converted into the connection state, the indication information may also need to carry a UE identifier of the UE in the cell, where the UE identifier is used as a unique identifier of the UE in the cell after the UE enters the connection state, and the specific process includes any one or a combination of the following steps:

1) Transmitting indication information carrying state transition of the UE in a resident cell identifier to the UE through Radio Resource Control (RRC) signaling to indicate the UE to enter a connected state, wherein the RRC message is optionally an RRC resume message or a newly defined RRC message; or (b)

2) Transmitting indication information carrying state transition of the UE in the resident cell identifier to the UE through a physical downlink control channel PDCCH so as to indicate the UE to enter a connection state; or (b)

3) And sending the Media Access Control (MAC) message to the UE to carry the indication information of the state transition of the UE in the resident cell identifier so as to indicate the UE to enter a connected state.

In specific implementation, the network side device may instruct the UE to enter the connected state by sending any one or any combination of the above, and the UE may also receive any one or any combination of the above sent by the network side to enter the connected state.

Optionally, the network side may also send, to the UE, indication information indicating that the UE enters a connection state or an idle state, or when the network side received by the UE determines to trigger to instruct the UE to perform state transition, the sent indication information indicating that the UE enters the connection state or the idle state, where a specific process includes any one or a combination of the following:

4) Transmitting indication information of state transition to the UE through Radio Resource Control (RRC) signaling to indicate the UE to enter a connected state or an idle state; or (b)

5) Transmitting indication information of state transition to the UE through a physical downlink control channel PDCCH to indicate the UE to recover a radio resource bearer (SIGNALLING RADIO BEARERS, SRB) or enter a connection state or enter an idle state; or (b)

6) And sending the indication information of state transition to the UE by the Media Access Control (MAC) message to indicate the UE to recover the radio resource bearer (SRB) or enter a connection state or enter an idle state.

Specifically, the network side device may send, through the foregoing 1) to 3) manners, indication information to the UE to indicate that the UE enters the connected state, or may send, through the foregoing 3 manners from 4) to 6) to the UE to indicate that the UE enters the connected state or the idle state, optionally, send, through the foregoing 2 manners from 5) and 6) to the UE, indication information to indicate that the UE recovers the SRB to enter the connected state, and of course, in a specific implementation, the network side device may send, through any one or any combination of multiple manners, indication information to the UE, for example, may indicate that the UE enters the connected state through the foregoing 1) manner, indicate that the UE enters the idle state through the foregoing 6) manner, or indicate that the UE recovers the SRB to enter the connected state through the foregoing 5) manner, which is set by a person skilled in the art through actual needs, and will not be repeated herein.

Correspondingly, when the UE receiving network side determines to trigger the UE to perform state transition, the sent indication information of state transition comprises any one of the following:

Specifically, SRBs are special radio bearers that are used only to transmit RRC and NAS messages, and in protocol 36.331, the transmission channels of SRBs are defined:

SRB0 is used to transmit RRC messages, transmitted on the common control channel CCCH;

SRB1 is used to transmit RRC messages (which may include piggybacked NAS messages), established prior to the establishment of SRB2 bearers, with higher priority than SRB2, transmitted on dedicated control channel DCCH;

SRB2 is used to transmit NAS messages, has a lower priority than SRB1, and SRB2 is always configured after security mode activation, transmitted on dedicated control channel DCCH.

In the above modes, the SRB may be triggered to be recovered when the UE transmits the user plane data to the network side device, or alternatively, the SRB may be triggered to be recovered after the UE receives the indication information sent by the network side device.

As another alternative implementation manner, the SRB may be recovered to receive the RRC signaling when the UE transmits the user plane data to the network side device only in a case where the network side device sends, to the UE, indication information carrying state transition of the UE in the camped cell identifier through the radio resource control RRC signaling, for example, the C-RNTI (Cell Radio Network Temporary Identifier ) allocated to the UE is carried in the RRC resume message to notify the network that the network enters the connected state, or the network side device sends, to the UE, indication information of state transition through the radio resource control RRC signaling.

When the network side device sends the indication information to the UE, it may, but is not limited to, carry the indication information for sending state transition to the UE through MSGB or MSG4 in a random access process, optionally, the random access process includes a contention random access process or a non-contention random access process, and correspondingly, when the UE receives the indication information for triggering the network side to instruct the UE to perform state transition, the sent indication information for performing state transition includes that the receiving network side carries the indication information for instructing to perform state transition through a message B MSGB or a message 4MSG4 in the random access process.

When the network side device sends the indication information of state transition to the UE, the indication information may be sent by, but not limited to, a preset PDCCH scrambled by a preset radio network temporary identifier RNTI, or sending scheduling information of the indication information, where the preset radio network temporary identifier RNTI and/or the preset PDCCH may be configured to the UE by a network through dedicated signaling or system information broadcast. The RNTI may be a preset PDCCH-dedicated RNTI, or a preset PDCCH-dedicated RNTI associated with a preset configured uplink resource, or a UE-dedicated RNTI.

Before or after the network side device sends the indication information to the UE, at least one of the following steps is further executed:

A PDCP (PACKET DATA Convergence Protocol ) entity that re-establishes a first signaling radio bearer, SRB1, that interacts with the UE and/or a PDCP entity that re-establishes SRB 2;

recovering SRB1 and/or SRB2 interacted with the UE;

Restoring a Data radio bearer (Data RadioBearer, DRB) interacted with the UE, the DRB being for carrying user plane Data;

and restoring the stored security key and/or security algorithm of the UE, wherein the security key and the security algorithm are used for encrypting the DRB and the SRB and protecting the integrity.

Before the UE receives the indication information of the state transition sent when the network side determines to trigger to instruct the UE to perform the state transition, or after the UE transitions to the connection state according to the indication information, at least one step of:

a first signaling radio bearer SRB1 configuration and/or a second signaling radio bearer SRB2 configuration specified in the application protocol;

Recovering SRB1 and/or SRB2;

Recovering the data resource bearer DRB;

The stored security keys and/or security algorithms are restored.

Optionally, any one of the above steps may be executed, or may be executed according to any combination, which is set by a person skilled in the art according to actual needs, and not described herein, specifically, before the UE determines, at the receiving network side, the indication information of the state transition sent when the UE is triggered to perform the state transition, or after the UE is transitioned to the connection state according to the indication information;

After the UE is converted to the connection state according to the indication information, at least one of the following steps is executed:

Deleting the stored UE non-activated state context;

Specifically, any one of the above steps may be executed, or may be executed according to any combination, and those skilled in the art may set the steps according to actual needs, which is not described herein.

Optionally, the UE transmits user plane data to the network side device, including but not limited to the following two ways:

As shown in fig. 2, a flowchart of a method for performing state transition on an inactive UE according to an embodiment of the present application specifically includes:

step S201, UE transmits user plane data to network equipment;

Specifically, the UE transmits user plane data to the network side device through an uplink resource preconfigured by the resident cell or through a non-contention random access resource allocated by the resident cell.

Step S202, network side equipment receives user plane data transmitted by non-active state UE and determines whether to trigger the UE to perform state transition;

step S203, when the network side equipment determines to trigger the UE to perform state transition, sending indication information of state transition to the UE;

Specifically, the network side equipment sends indication information of state transition to the UE through MSGB or MSG4 in the random access process, or the UE receives the indication information sent by the network side equipment through monitoring a preset PDCCH scrambled by a preset radio network temporary identifier RNTI;

in step S204, the UE enters a connection state or enters an idle state or resumes the radio resource bearer SRB to enter the connection state according to the received indication information of the network side device.

A specific example of performing state transition by the network side device and the user terminal in cooperation with the UE in the inactive state in this embodiment is given below in combination with a specific transmission manner.

Example one

When the UE triggers w/o RRC SIGNALING small data transmission, the network side equipment indicates the UE to enter a connection state through RRC signaling, as shown in figure 3:

step S301, a UE in an inactive state has a pre-configured uplink resource distributed by a resident cell in the resident cell;

step S302, the inactive state UE decides to trigger the small data transmission scheme of w/o RRC signaling in the resident cell;

step S303, the inactive state UE sends small data to the network side equipment on the preconfigured uplink resource;

Step S304, the network side equipment receives the data sent by the UE and determines to trigger the UE to enter a connection state from an inactive state;

Step S305, the UE monitors the dedicated RNTI-scrambled PDCCH, where the RNTI may be an RNTI dedicated for the associated downlink PDCCH configured for the pre-configured uplink resource, or an RNTI configured for the UE dedicated, or an RNTI configured for the UE in advance for the network side device, e.g., configured for the UE by the network side when entering the inactive state;

step S306, the network side sends RRC message to inform UE to enter the connection state, the RRC message is RRC resume message or newly defined RRC message, the RRC message may contain UE identification information such as C-RNTI in the resident cell configured for UE, which is used as UE identification of UE in the cell after the UE enters the connection state;

Step S307, UE acquires the scheduling information of RRC signaling by monitoring PDCCH, acquires the RRC signaling, and enters a connection state according to the indication of the RRC signaling;

step S308, the UE determines the UE identity according to any one of the following ways:

1) According to UE identification information configured for UE by resident cells in RRC message, the UE enters a connection state to use the UE identification information as the UE identification of the cells;

2) The UE uses the RNTI as a UE identity of the UE in the camping cell, i.e., a dedicated RNTI used in step S305;

3) The UE resumes the UE identification information used before entering the inactive state as the UE identification of the resident cell;

4) The UE uses a UE identifier pre-configured to the UE by the network side as a UE identifier of the UE in the cell after entering the connected state, for example, the network side configures the UE by signaling when the UE enters the inactive state.

Example two

The UE has non-contention random access resources distributed by a network side in a residence cell, and when the UE triggers w/o RRC SIGNALING small data transmission, the network side equipment indicates the UE to enter a connection state through RRC signaling, as shown in fig. 4:

Step S401, non-contention random access resource allocated by non-activated UE for the UE in resident cell is provided;

Step S402, the inactive state UE decides to trigger the small data transmission scheme of w/o RRC signaling in the resident cell;

Step S403, the non-activated UE triggers a non-contention random access process and transmits small data to the network side equipment along with the random access process, for example, small data is transmitted along with msg3 in a 4step random access process or small data is transmitted along with MSGA in a 2step random access process;

Step S404, the network side equipment receives the data sent by the UE and determines to trigger the UE to enter a connection state from an inactive state;

step S405, the UE monitors a response message of the network in the random access procedure, such as MSG4 or MSGB;

In step S406, the network side sends an RRC message to notify the UE of entering the connected state, where the RRC message is an RRC resume message or a newly defined RRC message, and the RRC message may include UE identification information of the own cell configured for the UE, for example, a C-RNTI, for the UE to be used as a UE identification of the UE in the cell after the UE enters the connected state, and the RRC message is sent to the UE along with a random access procedure, and the message may be sent to the UE along with msg4 in a random access procedure, for example, or sent to the UE along with MSGB in a random access procedure of 2 step.

Step S407, the UE monitors PDCCH to obtain the scheduling information of RRC signaling through monitoring a random access process, acquires the RRC signaling, and enters a connection state according to the RRC signaling instruction;

in step S408, the UE determines the UE identity according to any one of the following ways:

2) The UE resumes the UE identification information used before entering the inactive state as the UE identification of the resident cell;

3) The UE uses a UE identifier pre-configured to the UE by the network side as a UE identifier of the UE in the cell after entering the connected state, for example, the network side configures the UE by signaling when the UE enters the inactive state.

Example three

When the UE triggers w/o RRC SIGNALING small data transmission, the network side equipment indicates the UE to enter a connection state through a PDCCH or an MAC message, as shown in fig. 5:

step S501, the inactive state UE has the preconfigured uplink resource distributed by the resident cell in the resident cell;

Step S502, the inactive state UE decides to trigger the small data transmission scheme of w/o RRC signaling in the resident cell;

step S503, the inactive state UE sends small data to the network side equipment on the preconfigured uplink resource;

step S504, the network side equipment receives the data sent by the UE and determines to trigger the UE to enter a connection state from an inactive state;

in step S505, the UE monitors the dedicated RNTI-scrambled PDCCH, where the RNTI may be an associated downlink PDCCH dedicated RNTI configured for the pre-configured uplink resource, or an RNTI configured for the UE dedicated, or an RNTI pre-configured for the UE for the network side device, e.g. configured for the UE by the network side when entering the inactive state.

Step S506, the network side device sends a PDCCH order or a MAC CE message to notify the UE of entering the connection state, where the PDCCH order or the MAC CE message may contain UE identification information of a resident cell configured for the UE, for example, a C-RNTI, which is used as a UE identification of the UE in the cell after the UE enters the connection state, or may contain indication information indicating that the UE resumes SRB or enters the connection state;

Step S507, the UE in the inactive state acquires a PDCCH command or an MAC CE message by monitoring the PDCCH, and enters a connection state according to the PDCCH command or the MAC CE message;

Step S508, the UE determines the UE identity according to any one of the following ways:

1) According to the PDCCH command or the UE identification information of the resident cell configured for the UE in the MAC CE message, the UE enters a connection state and uses the UE identification information as the UE identification of the cell;

2) The UE uses the RNTI as a UE identity of the UE in the camping cell, i.e., a dedicated RNTI used in step S505;

3) The UE resumes the UE identification information used before entering the inactive state as the UE identification of the cell;

4) The UE uses a UE identifier pre-configured to the UE by the network side as the UE identifier of the UE in the cell after entering a connection state, for example, the network side is configured to the UE through signaling when the UE enters an inactive state;

In step S509, if the PDCCH order or the MAC CE message contains the indication information for recovering SRB, the UE recovers SRB according to the indication information and enters the connected state.

Example four

The UE has non-competitive random access resources distributed by a network side in a resident cell, and when the UE triggers w/o RRC SIGNALING small data transmission, the network side equipment indicates the UE to enter a connection state through PDCCH or MAC information, as shown in fig. 6:

Step S601, non-contention random access resource distributed by a residence cell is provided for non-activated UE in the residence cell;

Step S602, the inactive state UE decides to trigger the small data transmission scheme of w/o RRC signaling in the resident cell;

Step S603, the inactive UE triggers a non-contention random access procedure, and sends small data to the network side device along with the non-contention random access procedure, for example, sends small data along with msg3 in a 4step random access procedure, or sends small data along with MSGA in a 2step random access procedure;

step S604, the network side equipment receives the data sent by the UE and determines to trigger the UE to enter a connection state from an inactive state;

in step S605, the UE listens to the response message of the network in the random access procedure, such as MSG4 or MSGB.

In step S606, the network side sends a PDCCH order or a MAC CE message to notify the UE of entering the connection state, where the PDCCH order or the MAC CE message may contain UE identification information of the cell configured for the UE, for example, a C-RNTI, which is used as a UE identification of the UE in the cell after the UE enters the connection state, or may contain indication information for indicating that the UE recovers SRB or enters the connection state, where the PDCCH order or the MAC CE message is sent to the UE along with a random access procedure, where the message may be sent to the UE along with msg4 in a random access procedure, for example, or sent to the UE along with MSGB in a random access procedure of 2 step.

Step S607, the inactive state UE monitors the random access process, monitors and acquires the PDCCH command or the MAC CE message, and enters the connection state according to the PDCCH command or the MAC CE message indication;

In step S608, the UE determines the UE identity according to any one of the following ways:

2) The UE resumes the UE identification information used before entering the inactive state as the UE identification of the cell;

3) The UE uses a UE identifier pre-configured to the UE by the network side as the UE identifier of the UE in the cell after entering a connection state, for example, the network side is configured to the UE through signaling when the UE enters an inactive state;

In step S609, if the PDCCH order or the MAC CE message contains the indication information for recovering SRB, the UE instructs the UE to recover SRB, and the UE recovers SRB according to the indication information and enters the connected state.

Example five: after the UE enters the connected state, at least one of the following is performed:

1) Using a default SRB1 configuration and/or SRB2 configuration;

2) A PDCP entity that re-establishes SRB1 and/or a PDCP entity that re-establishes SRB 2;

3) Recovering SRB1 and/or SRB2;

4) Recovering the DRB;

5) Delete UE inactive context stored;

6) The UE continues to use a security key and/or a security algorithm used when transmitting small data after receiving a message sent by a network side and notifying the UE to enter a connection state;

7) The UE uses a special RNTI as a UE identifier of the cell, and the RNTI is used for monitoring the PDCCH when the UE transmits small data in an inactive state;

8) The UE restores the UE identification information used before entering the inactive state as the UE identification of the cell;

9) The UE uses the UE identification pre-configured to the UE by the network side as the UE identification of the UE in the cell after entering the connection state.

Example six: the specific steps of the network side device sending the indication information of the state transition to the UE through the RRC, PDCCH or MAC message to indicate the UE to enter the idle state are shown in fig. 7:

Step S701, the network side informs the UE to enter an idle state by sending an RRC signaling, a MAC CE, or a PDCCH message, where the RRC signaling may be a RRC RELEASE message or a newly defined RRC message, or an existing RRC message carries identification information indicating that the UE enters an idle state;

in step S702, the UE receives the indication information of the network side device, and enters an idle state according to the indication information.

The specific implementation process is as in examples 1-4, and detailed description is omitted for configuring the UE to transition to the idle state.

Example 2

Based on the same inventive concept, the embodiment of the invention also provides a method for indicating the non-active state user equipment UE to perform state transition, and because the method corresponds to the method corresponding to the network side equipment for indicating the non-active state user equipment UE to perform state transition in the embodiment of the invention, and the principle of solving the problem in the method is similar to that of the network side equipment, the implementation of the method can refer to the implementation of the network side equipment, and the repetition is omitted.

As shown in fig. 8, a flowchart of a method for indicating a non-active UE to perform state transition according to an embodiment of the present invention specifically includes the following steps:

Step S801, receiving user plane data transmitted by non-active state UE;

Step S802, when determining to trigger the UE to perform state transition, sending indication information of state transition to the UE, so as to instruct the UE to restore the radio resource bearer SRB or enter a connection state or enter an idle state.

Optionally, sending indication information of state transition to the UE to instruct the UE to recover the radio resource bearer SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

Based on the same inventive concept, the embodiment of the invention also provides a method for performing state transition by the user equipment UE in the inactive state, and because the method corresponds to the method corresponding to the user terminal for performing state transition by the user equipment UE in the inactive state in the embodiment of the invention, and the principle of solving the problem of the method is similar to that of the user terminal, the implementation of the method can refer to the implementation of the user terminal, and the repetition is omitted.

As shown in fig. 9, a method for performing state transition for an inactive UE according to an embodiment of the present invention specifically includes the following steps:

step S901, transmitting user plane data to a network side;

In step S902, the receiving network side determines the indication information of the state transition sent when triggering to instruct the UE to perform the state transition, and recovers the radio resource bearer SRB or enters a connection state or enters an idle state according to the indication information.

Optionally, transmitting user plane data to a network side includes:

Optionally, when the receiving network side determines to trigger to instruct the UE to perform state transition, the sent indication information of state transition includes any one or a combination of the following:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

Deleting the stored UE non-activated state context;

Optionally, transmitting user plane data to a network side includes:

Example 3

The method for indicating the inactive state UE to perform the state transition in the present invention is described above, and the network side device for performing the state transition for the inactive state UE is described below.

Referring to fig. 10, in an embodiment of the present application, a network side device for indicating an inactive UE to perform state transition includes: at least one processor 1001 and at least one memory 1002, and a bus system 1009;

wherein the memory stores a computer program, and the processor is configured to read the program in the memory and execute:

Receiving user plane data transmitted by the UE in an inactive state;

Fig. 10 is a schematic diagram of a network side device for indicating a state transition of an inactive UE according to an embodiment of the present application, where the network side device 1000 may have a relatively large difference due to different configurations or performances, and may include one or more processors (english: central processing units, english: CPU) 1001 (e.g., one or more processors) and a memory 1002, and one or more storage media 1003 (e.g., one or more mass storage devices) for storing applications 1004 or data 1005. Wherein the memory 1002 and the storage medium 1003 may be transitory or persistent. The program stored in the storage medium 1003 may include one or more modules (not shown), and each module may include a series of instruction operations to the information processing apparatus. Still further, the processor 1001 may be configured to communicate with the storage medium 1003, and execute a series of instruction operations in the storage medium 1003 on the network-side device 1000.

The network side device 1000 may also include one or more wired or wireless network interfaces 1007, one or more input/output interfaces 1008, and/or one or more operating systems 1006, such as Windows Server, mac OS X, unix, linux, freeBSD, etc.

Optionally, the processor is configured to send, to the UE, indication information of a state transition to instruct the UE to recover a radio resource bearer SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

Referring to fig. 11, a UE for performing state transition in an inactive UE according to an embodiment of the present application includes: at least one processor 1101 and at least one memory 1102, and a bus system 1109;

Transmitting user plane data to a network side;

Fig. 11 is a user terminal for performing state transition by using an inactive UE according to an embodiment of the present application, where the user terminal 1100 may have a relatively large difference due to different configurations or performances, and may include one or more processors (english: central processing units, english: CPU) 1101 (e.g., one or more processors) and a memory 1102, and one or more storage mediums 1103 (e.g., one or more mass storage devices) for storing application 1104 or data 1105. Wherein the memory 1102 and storage medium 1103 can be transitory or persistent. The program stored in the storage medium 1103 may include one or more modules (not shown), each of which may include a series of instruction operations to the information processing apparatus. Still further, the processor 1101 may be arranged to communicate with a storage medium 1103 and to execute a series of instruction operations in the storage medium 1103 on the user terminal 1100.

The user terminal 1100 may also include one or more wired or wireless network interfaces 1107, one or more input/output interfaces 1008, and/or one or more operating systems 1106, such as Windows Server, mac OS X, unix, linux, freeBSD, etc.

Optionally, the processor is configured to receive, when the network side determines to trigger to instruct the UE to perform state transition, sent indication information of state transition, where the indication information includes any one or a combination of the following:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

Deleting the stored UE non-activated state context;

The network side device and the user terminal for performing state transition of the non-active UE in the embodiment of the present application are described above from the viewpoint of hardware processing, and the user terminal and the network side device for performing state transition of the non-active UE in the embodiment of the present application are described below from the viewpoint of a modularized functional entity.

Referring to fig. 12, a network side device for indicating an inactive UE to perform state transition according to an embodiment of the present invention includes:

a receiving unit 1201, configured to receive user plane data transmitted by an inactive UE;

a first switching unit 1202, configured to send, when determining to trigger the UE to perform state switching, indication information of state switching to the UE, so as to instruct the UE to restore the radio resource bearer SRB or enter a connection state or enter an idle state.

Receiving user plane data transmitted by the UE in an inactive state;

and when the UE is determined to be triggered to perform state transition, sending indication information of state transition to the UE so as to indicate the UE to perform state transition.

Optionally, the receiving unit is configured to receive user plane data transmitted by the UE in an inactive state, and specifically is configured to:

Optionally, the first switching unit is configured to send, to the UE, indication information of state switching to instruct the UE to restore a radio resource bearer SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

Optionally, the first switching unit is configured to send indication information of state switching to the UE, specifically configured to:

Optionally, the first conversion unit is configured to perform at least one of the following steps before sending the indication information or after sending the indication information:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

Referring to fig. 13, a UE for performing state transition in an inactive state according to an embodiment of the present invention includes:

a transmission unit 1301, configured to transmit user plane data to a network side;

the second switching unit 1302 is configured to receive the indication information sent by the network side when determining to trigger to instruct the UE to perform state switching, and restore the radio resource bearer SRB or enter a connected state or enter an idle state according to the indication information.

Optionally, the transmission unit is configured to transmit user plane data to a network side, specifically configured to:

Optionally, the second conversion unit is configured to receive, when the network side determines to trigger to instruct the UE to perform state conversion, sent indication information of state conversion, where the indication information includes any one or a combination of the following:

Optionally, the second conversion unit is configured to receive, when the network side triggers to instruct the UE to perform state conversion, sent indication information of state conversion, and specifically is configured to:

Optionally, the second conversion unit is configured to receive, when the network side determines to trigger to instruct the UE to perform state conversion, sent indication information of state conversion, and specifically is configured to:

Optionally, before receiving the indication information sent by the network side to indicate the UE to perform state transition when determining to trigger the UE to perform state transition, or after indicating the UE to transition to the connection state according to the indication information, the second transition unit further includes executing at least one step as follows:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

Optionally, the second switching unit is configured to perform at least one of the following steps after the UE is instructed to switch to the connected state according to the instruction information:

Deleting the stored UE non-activated state context;

Optionally, transmitting user plane data to a network side includes:

The embodiment of the invention also provides a computer readable storage medium, which comprises instructions that when run on a computer, cause the computer to execute the method for performing state transition of the inactive UE provided in the above embodiment.

The embodiment of the application also provides a computer program product, which comprises a computer program, wherein the computer program comprises program instructions, and when the program instructions are executed by electronic equipment, the electronic equipment is caused to execute the method for performing state transition on the inactive state UE provided by the embodiment.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and modules described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Drive (SSD)), etc.

The above description has been made in detail for the technical solutions provided by the present application, and specific examples are applied in the present application to illustrate the principles and embodiments of the present application, and the above examples are only used to help understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A method for indicating an inactive state user equipment UE to perform state transition, the method comprising:

receiving data which is transmitted by the non-activated UE and does not accompany RRC signaling transmission; and/or receiving user plane data transmitted by the UE in an inactive state, wherein RRC signaling transmitted by the UE is not received before the user plane data is received;

when determining to trigger the UE to perform state transition, sending indication information of state transition to the UE so as to indicate the UE to recover a radio resource bearer SRB or enter a connection state or enter an idle state, wherein the indication information comprises one or a combination of the following steps:

Transmitting indication information of state transition to the UE through a PDCCH (physical downlink control channel) to indicate the UE to recover SRB (SRB), enter a connection state or enter an idle state; or (b)

2. The method of claim 1, wherein transmitting to the UE indication information of a state transition comprises:

3. The method of claim 1, wherein transmitting to the UE indication information of a state transition comprises:

4. The method of claim 1, wherein before or after transmitting the indication information, further comprising performing at least one of:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

5. A method for performing state transition by a non-active UE, the method comprising:

transmitting data which is not transmitted along with RRC signaling to a network side, and/or transmitting user plane data to the network side, wherein the RRC signaling is not transmitted to the network side before the user plane data is transmitted;

When the receiving network side determines to trigger the UE to perform state transition, the sent indication information of state transition is recovered, and the radio resource bearer SRB is restored or enters a connection state or enters an idle state according to the indication information, wherein the method comprises one or a combination of the following steps:

6. The method of claim 5, wherein receiving the indication information of the state transition sent when the network side triggers the UE to perform the state transition, comprises:

7. The method of claim 5, wherein the receiving network side determines the indication information of the state transition sent when triggering the state transition of the UE, and includes:

8. The method according to claim 5, wherein before the receiving network side determines the indication information for triggering the state transition to instruct the UE to perform the state transition, or after the UE is instructed to transition to the connected state according to the indication information, further comprising performing at least one of the following steps:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

9. The method of claim 5, further comprising performing at least one of the following steps after the UE is instructed to switch to a connected state according to the instruction information:

Deleting the stored UE non-activated state context;

10. The method of claim 5, wherein transmitting user plane data to a network side comprises:

11. A network side device for indicating a state transition of an inactive UE, comprising: a memory, a processor, the memory storing a computer program;

The processor is configured to read a program in the memory and execute:

12. The network-side device of claim 11, wherein sending the UE indication information of the state transition comprises:

13. The network side device according to claim 11, wherein the processor is configured to send indication information of state transition to the UE, specifically configured to:

14. The network side device of claim 11, wherein the processor is configured to perform at least one of the following steps before sending the indication information or after sending the indication information:

recovering SRB1 and/or SRB2 interacted with the UE;

recovering a data radio bearer, DRB, interacted with the UE;

and restoring the stored security key and/or security algorithm of the UE.

15. A user terminal for performing state transition by a non-active user equipment UE, comprising: a memory, a processor, the memory storing a computer program;

The processor is configured to read a program in the memory and execute:

16. The UE of claim 15, wherein the processor is configured to receive indication information of the state transition sent when the network side triggers to instruct the UE to perform the state transition, and specifically configured to:

17. The UE of claim 15, wherein the processor is configured to receive indication information of the sent state transition when the network side determines to trigger the UE to perform the state transition, and specifically configured to:

18. The UE of claim 15, wherein the processor is configured to perform at least one of the following steps before receiving indication information sent when the network side determines to trigger to instruct the UE to perform a state transition, or after instructing the UE to transition to a connected state according to the indication information:

Recovering SRB1 and/or SRB2;

Recovering the data radio bearer DRB;

The stored security keys and/or security algorithms are restored.

19. The UE of claim 15, wherein the processor is configured to perform at least one of the following steps after instructing the UE to switch to a connected state according to the indication information:

Deleting the stored UE non-activated state context;

20. The ue of claim 15, wherein the processor is configured to transmit user plane data to a network side, specifically configured to:

21. A network side device for indicating a state transition of an inactive UE, the network side device comprising:

A receiving unit, configured to receive data transmitted by an inactive UE and not accompanied with RRC signaling transmission; and/or receiving user plane data transmitted by the UE in an inactive state, wherein RRC signaling transmitted by the UE is not received before the user plane data is received;

the first switching unit is configured to send, when determining to trigger the UE to perform state switching, indication information of state switching to the UE, so as to instruct the UE to restore the radio resource bearer SRB or enter a connection state or enter an idle state, where the first switching unit includes one or a combination of the following:

22. A user terminal for performing state transition by a UE in an inactive state, the user terminal comprising:

a transmission unit, configured to transmit data that is not accompanied with RRC signaling transmission to a network side, and/or transmit user plane data to the network side, where the RRC signaling is not transmitted to the network side before the user plane data is transmitted;

the second conversion unit is configured to receive indication information sent by the network side when determining to trigger to instruct the UE to perform state conversion, and recover the radio resource bearer SRB or enter a connection state or enter an idle state according to the indication information, where the second conversion unit includes one or a combination of the following:

23. A computer readable storage medium comprising computer program instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 4 or to perform the method of any one of claims 5 to 10.