CN113498081B

CN113498081B - User plane data transmission method, user terminal and network side equipment

Info

Publication number: CN113498081B
Application number: CN202010256816.6A
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: 2024-02-27
Anticipated expiration: 2040-04-02
Also published as: WO2021197103A1; CN113498081A

Abstract

The invention provides a method for transmitting user plane data, a user terminal and network side equipment, comprising the following steps: when triggering to transmit user plane data to a network side, corresponding transmission configuration is carried out on at least one layer to enter a data sending state and/or a data receiving state, and the UE is in an inactive state; and transmitting the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied with the Radio Resource Control (RRC) signaling. According to the invention, when the UE is triggered to send the user plane data to the network side equipment, configuration transmission is carried out on at least one layer, so that the UE can transmit the user plane data according to the configuration information, and the problem of how to treat the corresponding RRC layer in the w/o RRC signaling small data transmission scheme when the w/o RRC signaling small data transmission scheme is executed is solved.

Description

User plane data transmission method, user terminal and network side equipment

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method for transmitting user plane data, 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 completes 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) transmission. When the RRC signaling transmits small data, 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, so as to further instruct the UE to enter a connection state, an idle state or an inactive state; when w/o RRC signaling is used to transmit small data, that is, the UE does not carry additional RRC messages outside the small data packet to be transmitted for the first time.

For the current w/o RRC signaling small data transmission scheme, since the procedure of small data transmission is limited to not accompany RRC signaling, but how the corresponding RRC layer processes when the w/o RRC signaling small data transmission scheme is performed, there is no specific scheme.

Disclosure of Invention

The invention provides a user plane data transmission method, a user terminal and network side equipment, which are used for solving the problem of how to process a corresponding RRC layer in a w/o RRC signaling small data transmission scheme when the w/o RRC signaling small data transmission scheme is executed.

According to a first aspect of embodiments of the present application, there is provided a method for transmitting user plane data, applied to a user terminal, the method including:

when triggering to transmit user plane data to a network side, corresponding transmission configuration is carried out on at least one layer to enter a data sending state and/or a data receiving state, wherein the UE is in an inactive state;

and transmitting the user plane data to a network side according to the configuration information, wherein the transmission of the user plane data is not accompanied with Radio Resource Control (RRC) signaling.

Optionally, triggering transmission of user plane data to the network side includes:

the RRC layer determines whether to trigger the transmission of user plane data to the network side; or alternatively

The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the indication information of the higher layer; or alternatively

And the RRC layer determines whether to trigger the transmission of user plane data to the network side according to the indication information of the Media Access Control (MAC) layer.

determining whether the current resident cell is the last accessed cell before the UE enters the inactive state, and if so, triggering to transmit user plane data to a network side;

otherwise, triggering and executing the RRC recovery process to request to enter a connection state.

Optionally, performing the respective transmission configuration at least one layer into a transmit data state and/or a receive data state comprises performing at least one of the following steps:

default parameters of physical layer-by-layer L1 in an application protocol do not include the L1 parameters in a system information broadcast message;

restoring stored access layer context related information in an inactive state;

a packet data convergence protocol PDCP entity reconstructing all data radio bearer DRB or performing a data recovery procedure of PDCP of all acknowledged mode AM DRB;

a PDCP entity re-establishing a DRB for transmitting data to be transmitted or performing a PDCP data recovery procedure;

reconstructing radio link layer control (RLC) entities of all DRB;

reconstructing RLC entities of the DRBs for transmitting data to be transmitted;

resume the suspended DRB or resume the suspended DRB for transmitting data to be transmitted;

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;

default configuration of the medium access control MAC specified in the application protocol;

common control channel CCCH configuration specified in the application protocol;

a PDCP entity that re-establishes SRB1 and/or a PDCP entity that re-establishes SRB2;

recovering SRB1 and/or SRB2;

Restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

configuring the bottom layer through the RRC layer to use integrity protection and encryption;

and indicating the bottom layer to transmit the data to be transmitted through the RRC layer.

Optionally, transmitting the user plane data to a network side according to configuration information includes:

transmitting the user plane data to a network side through uplink resources pre-configured for the terminal by the network side; or (b)

And transmitting the user plane data to a network side in a message AMSGA or a message 3MSG3 through a special random access resource.

Optionally, after transmitting the user plane data to the network side according to the configuration information, the method further includes:

and monitoring a PDCCH (physical downlink control channel) scrambled by using the preset Radio Network Temporary Identifier (RNTI) allocated for the UE.

and sending indication information to a network side when the user plane data to be transmitted is determined not to be needed.

Optionally, when determining that the user plane data to be transmitted is no longer available, sending indication information to the network side, including:

When the last data packet to be transmitted is transmitted, transmitting indication information to a network side through an MAC layer or a physical layer to indicate that the data packet is the last data packet or no data to be transmitted exists; or alternatively

Transmitting indication information to a network side through an MAC or a physical layer to indicate that no data to be transmitted exists; or alternatively

And sending indication information to the network through the MAC layer or the physical layer to indicate the UE to fall back to an inactive state and not to transmit and receive data.

the RRC layer determines whether to fall back to an inactive state and does not transmit and receive data any more; or alternatively

The RRC layer determines whether to fall back to an inactive state or not and does not transmit and receive data any more according to the indication information of the higher layer; or alternatively

And the RRC layer determines whether to fall back to an inactive state or not and does not transmit and receive data any more according to the indication information of the MAC layer.

the receiving network side indicates the UE to fall back to the inactive state through the RRC message or the MAC message or the physical layer message and does not transmit and receive data any more.

The updated pre-configured dedicated resources indicated by the RRC message or the MAC message or the physical layer message by the network side are received.

Optionally, after determining to fall back to the inactive state and not transmit or receive data, performing at least one of the following steps:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

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

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

According to a second aspect of embodiments of the present application, a method for transmitting user plane data is provided, and the method is applied to a network side device, and includes:

carrying out communication configuration for User Equipment (UE) so that the UE carries out corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, wherein the UE is inactive state UE;

and receiving user plane data transmitted by the UE according to the configuration information, wherein the UE transmits the user plane data without Radio Resource Control (RRC) signaling.

Optionally, the communication configuration with the UE is performed to enable the UE to perform corresponding transmission configuration in at least one layer, including performing at least one of the following steps:

Restoring stored access layer context related information of the UE;

reconstructing a Packet Data Convergence Protocol (PDCP) entity of all Data Resource Bearer (DRB) interacted with the UE or executing a data recovery process of PDCP of all acknowledged mode (AM DRB);

reconstructing a PDCP entity which interacts with the UE and is used for transmitting the DRB of the data to be transmitted or executing a PDCP data recovery process;

reestablishing radio link layer control (RLC) entities of all DRBs interacted with the UE;

reconstructing an RLC entity of the DRB interacted with the UE for transmitting data to be transmitted;

resume a suspended DRB interacting with the UE or resume a suspended DRB for transmitting data to be transmitted;

defining a default configuration in a first signaling radio bearer, SRB1, and/or a second signaling radio bearer, SRB2, application protocol, with which the UE is interacting;

a PDCP entity of SRB1 and/or a PDCP entity of SRB2 which are interacted with the UE are re-established;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

the bottom layer of the UE is configured to use integrity protection and encryption.

Optionally, receiving the UE user plane data transmitted according to the configuration information includes:

receiving user plane data transmitted by the UE through uplink resources preconfigured by a network side for a resident cell; or (b)

And receiving user plane data transmitted by the UE in the message AMSGA or the message 3MSG3 through a special random access resource.

and when the UE determines that the user plane data to be transmitted is no longer available, corresponding indication information is sent.

Optionally, when receiving the user plane data determined by the UE that no more user plane data is to be transmitted, the sending corresponding indication information includes:

receiving indication information sent to a network side by an MAC layer or a physical layer when the UE sends the last data packet to be transmitted, wherein the indication information is used for indicating that the data packet is the last data packet or no data to be transmitted exists; or alternatively

Receiving indication information sent by the UE to a network side through an MAC or a physical layer, wherein the indication information is used for indicating that no data to be transmitted exists; or alternatively

And receiving indication information sent by the UE to a network side through the MAC layer or the physical layer, wherein the indication information is used for indicating the UE to fall back to an inactive state and not to transmit and receive data.

Optionally, receiving the UE user plane data transmitted according to the configuration information, further includes:

the UE is instructed to fall back to the inactive state and no longer transmit and receive data through RRC message, MAC message or physical layer message.

the updated pre-configured dedicated resources are indicated to the UE through an RRC message, a MAC message, or a physical layer message.

Optionally, after the UE is instructed to fall back to the inactive state and no longer perform data transceiving, at least one of the following steps is performed:

reconstructing an RLC entity of SRB1 and/or reconstructing an RLC entity of SRB2 interacted with the UE;

reconstructing a PDCP entity of SRB1 and/or reconstructing a PDCP entity of SRB2 interacted with the UE;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

and saving the context of the UE.

According to a third aspect of embodiments of the present application, there is provided a user terminal for user plane data transmission, including: a memory, a processor, the memory storing a computer program;

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

Optionally, the processor is configured to trigger transmission of user plane data to a network side, specifically configured to:

Optionally, the processor is configured to perform at least one layer a corresponding transmission configuration into a transmit data state and/or a receive data state, including performing at least one of the following steps:

Restoring stored access layer context related information in an inactive state;

reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

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

And transmitting the user plane data to a network side in a message A MSGA or a message 3MSG3 through a special random access resource.

Optionally, the processor is configured to, after transmitting the user plane data to a network side according to the configuration information, further be configured to:

Optionally, the processor is configured to send indication information to the network side when determining that user plane data is no longer to be transmitted, specifically configured to:

Optionally, after determining to fall back to the inactive state and not transmit or receive data, the processor performs at least one of the following steps:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

According to a fourth aspect of embodiments of the present application, there is provided a network side device for user plane data transmission, including: a memory, a processor, the memory storing a computer program;

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

Optionally, the processor is configured to perform communication configuration with the UE, so that the UE performs corresponding transmission configuration in at least one layer, and includes performing at least one step of:

Restoring stored access layer context related information of the UE;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

Optionally, the processor is configured to receive user plane data transmitted by the UE according to the configuration information, and specifically is configured to:

Optionally, the processor is configured to receive corresponding indication information sent when the UE determines that user plane data is no longer to be transmitted, and specifically is configured to:

Optionally, the processor is configured to receive user plane data transmitted by the UE according to configuration information, and is further configured to:

Optionally, the processor is configured to perform at least one of the following steps after instructing the UE to fall back to the inactive state and no longer perform data transceiving:

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

and saving the context of the UE.

According to a fifth aspect of embodiments of the present application, there is provided a user terminal for user plane data transmission, the user terminal comprising:

The first configuration unit is used for performing corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state when triggering the transmission of user plane data to a network side, wherein the UE is in an inactive state;

and the first transmission unit is used for transmitting the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied with Radio Resource Control (RRC) signaling.

According to a sixth aspect of embodiments of the present application, there is provided a network side device for user plane data transmission, where the network side device includes:

the second configuration unit is used for carrying out communication configuration on User Equipment (UE) so that the UE carries out corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, and the UE is inactive;

and the second transmission unit is used for receiving the user plane data transmitted by the UE according to the configuration information, wherein the UE transmits the user plane data without Radio Resource Control (RRC) signaling.

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

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 related methods of implementing the above aspects and aspects of embodiments of the present application.

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 transmitting the user plane data, the user terminal and the network side equipment provided by the invention have the following beneficial effects:

according to the method for transmitting the user plane data, the user terminal and the network side equipment, when the UE is triggered to transmit the user plane data to the network side equipment, configuration transmission is carried out on at least one layer, so that the UE transmits the user plane data according to the configuration information, and the problem of how to process the corresponding RRC layer in the w/o RRC signaling small data transmission scheme when the w/o RRC signaling small data transmission scheme is executed is solved.

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 user plane data transmission system according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a user plane data transmission method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of UE behavior when the UE triggers w/o RRC signaling small data transmission according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a processing flow after the UE finishes transmitting small data to the network side according to the embodiment of the present invention;

fig. 5 is a schematic diagram of a UE internal trigger user plane data transmission method according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a method for determining whether to trigger transmission of user plane data according to whether a currently camping cell is a cell last accessed before a UE enters an inactive state according to an embodiment of the present invention;

fig. 7 is a schematic flow chart of a user plane data transmission method according to an embodiment of the present invention;

Fig. 8 is a flowchart of a user plane data transmission method according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a ue for transmitting user plane data according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a network side device for user plane data transmission according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a ue for transmitting user plane data according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a network side device for user plane data transmission 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 so as to complete the RRC resume process, and after the UE establishes RRC connection with the network side, the UE sends data to the network side through the allocated uplink resource.

In the existing small data transmission scheme, the UE transmits small data in an RRC inactive state in two modes, including a small data transmission mode accompanied by RRC signaling transmission and a small data transmission mode not accompanied by RRC signaling (i.e. w/o RRC signaling) transmission. When the RRC signaling transmits small data, 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 acquire 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 w/o RRC signaling is used to transmit small data, that is, the UE does not carry additional RRC messages outside the small data packet to be transmitted for the first time.

For the current w/o RRC signaling small data transmission scheme, since the procedure of small data transmission is limited and does not accompany RRC signaling, how the corresponding RRC layer processes when the w/o RRC signaling small data transmission scheme is performed, and how the UE performs the behavior and subsequent state after sending the small data, no specific scheme is available.

Based on the above problems, an embodiment of the present application provides a user plane data transmission method, which is used for solving the above problems. The following describes specific embodiments of the present invention with reference to the drawings.

Example 1

In the description process, the user plane data transmission system is described from the terminal and the implementation of the network side respectively, and then an example of the cooperation implementation of the two will be 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 transmitting user plane data according to an embodiment of the present application includes:

A UE101, configured to perform corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state when triggering transmission of user plane data to a network side, where the UE is an inactive state UE; and transmitting the user plane data to a network side according to the configuration information, wherein the transmission of the user plane data is not accompanied with Radio Resource Control (RRC) signaling.

The network side device 102 is configured to perform communication configuration for a UE, so that the UE performs corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, where the UE is an inactive UE; and receiving user plane data transmitted by the UE according to the configuration information, wherein the UE transmits the user plane data without Radio Resource Control (RRC) signaling.

At present, in the w/o RRC signaling small data transmission scheme, since the small data transmission process is limited to be not accompanied with RRC signaling, but how the corresponding RRC layer processes when the w/o RRC signaling small data transmission scheme is executed, and how the behavior and subsequent state of the UE after sending small data are processed, no specific scheme is provided, and in the embodiment of the present application, when the UE triggers to transmit user plane data to the network side, the UE performs corresponding transmission configuration on at least one layer to enter an inactive state data transceiving state, and then transmits user plane data to the network side according to the configuration information, and a specific scheme for processing the RRC layer in the w/o RRC signaling small data transmission scheme is provided.

In this embodiment, when the UE triggers transmission of user plane data to the network side device, the following modes are included:

1) Determining whether to trigger transmission of user plane data to the network side equipment or not through a Radio Resource Control (RRC) layer;

optionally, when the RRC layer detects that the UE stores user plane data transmitted to the network side device, the RRC layer determines to trigger transmission of the user plane data to the network side device. The specific data sent by the UE to the network side device may include, but is not limited to, the small data mentioned in the embodiment of the present application, where the small data process sent by the UE to the network side device is a small data transmission process that does not accompany RRC signaling, and no additional RRC message is carried except for the small data packet to be transmitted. For example, the RRC determines whether a small data transmission condition that triggers no RRC signaling is satisfied, and if so, triggers a small data transmission procedure that does not accompany RRC signaling.

2) Determining whether to trigger transmission of user plane data to a network side or not through an RRC layer according to the indication of a higher layer;

optionally, if the RRC receives the indication that the UE sent by the higher layer transmits the user plane data to the network side device, the RRC layer determines, according to the indication of the higher layer, whether to trigger a data transmission process that does not accompany RRC signaling, e.g., the higher layer notifies the RRC layer to trigger a data transmission process that does not accompany RRC signaling, or notifies the RRC to trigger an RRC recovery process to recover the RRC connection to enter a connected state to transmit the user plane data to the network side.

3) And determining whether to trigger transmission of user plane data to the network side or not by the RRC layer according to the indication of the Media Access Control (MAC) layer.

Optionally, if the RRC receives the indication that the UE transmits the user plane data to the network side device, the RRC layer determines to trigger to transmit the user plane data to the network side according to the indication of the MAC layer, where optionally, when the MAC layer detects that the UE stores the user plane data to be transmitted, or when the MAC layer detects that the UE receives the user plane data, the MAC layer determines to trigger the UE to transmit the user plane data to the network side device. For example, the MAC layer determines whether the triggering of the data transmission procedure without accompanying RRC signaling is satisfied according to the state of the data to be transmitted, and if so, the MAC layer indicates that the RRC triggers the data transmission procedure without accompanying RRC signaling, otherwise, the MAC layer may indicate that the RRC triggers the RRC connection recovery procedure.

The UE trigger may be determined to transmit the user plane data to the network side device by any one of the above methods, alternatively, the UE trigger may also be determined to transmit the user plane data to the network side device by any combination of the above methods, for example, when the RRC determines that the data transmission condition not accompanied by RRC signaling is met, it is determined by the RRC layer itself whether to trigger the data process not accompanied by RRC signaling to transmit the user plane data to the network side, or the higher layer instructs the RRC layer to trigger the data process not accompanied by RRC signaling to transmit the user plane data to the network side according to the higher layer instruction, or the MAC determines that the data transmission process not accompanied by RRC signaling is met, instructs the RRC layer to trigger the data transmission process not accompanied by RRC signaling according to the instruction of the medium access control MAC layer, which only gives a few examples combined by the above methods.

When the trigger transmits the user plane data to the network side, corresponding transmission configuration is performed on at least one layer to enter a data sending state and/or a data receiving state, at this time, the UE is in an inactive state, optionally, when the condition that the trigger transmits the user plane data to the network side is met, whether the current resident cell is a cell corresponding to the condition that the UE enters the inactive state is determined, and if so, the user plane data is triggered to be transmitted to the network side.

When the UE enters the inactive state, the air interface connection corresponding to the Access Stratum (AS) of the UE is temporarily suspended. However, both the UE side and the RAN (radio access network) side store the AS layer context in the inactive state of the UE, and at this time, if the current camping cell is not the cell corresponding to the time when the UE enters the inactive state, the UE will affect the process of transmitting the user plane data to the network side device, for example, when the network notifies the UE to enter the inactive state, the network pre-configures uplink resources, such AS PUSCH resources, available in the cell for the UE, when the UE camping cell is no longer the home cell, the UE will not have the pre-configured uplink resources available in the inactive state, and the UE needs to trigger the RRC procedure for the network to acquire the context of the UE, so that the UE cannot trigger the small data transmission process that does not accompany RRC signaling. At this time, the RRC recovery procedure is triggered to be switched to a connected state, and when the UE establishes a connection with the network side device, user plane data is sent to the network side by using the prior art.

When determining that the user plane data is triggered to be transmitted to the network side, performing corresponding transmission configuration on at least one layer to enter a data transmitting state and/or a data receiving state, optionally, performing corresponding transmission configuration on at least one layer may be performing corresponding transmission configuration on one layer in a protocol, or may be performing corresponding transmission configuration on a plurality of different layers in the protocol, where the plurality of different layers are different layers obtained by combining the layers in the protocol, specifically, may be performing configuration by selecting a corresponding layer according to a current type of user plane data to be transmitted, or a transmission requirement, etc., and one skilled in the art may perform setting according to an actual situation without limitation herein, and in this embodiment, performing corresponding transmission configuration by the UE on at least one layer to enter a data receiving state includes performing at least one of the following steps:

restoring stored access layer context related information in a non-activated state, wherein the stored access layer context related information is used for restoring configuration information stored in a network side and a UE side;

a PDCP (Packet Data Convergence Protocol ) entity that reconstructs all DRBs (Data radio bearers) or performs a Data recovery procedure for PDCP of all acknowledged mode AM DRBs, wherein DRBs are used to carry user plane Data, PDCP is an acronym for packet Data convergence protocol, responsible for compressing and decompressing IP headers, transmitting user Data and maintaining sequence numbers as lossless radio bearers, and performing ciphering and deciphering and integrity protection;

Optionally, in this embodiment of the present application, all PDCP entities of the DRBs may be rebuilt or all PDCP data recovery processes of the acknowledged mode AM DRBs may be performed, or only PDCP entities of the DRBs used for transmitting the data to be transmitted may be rebuilt or only PDCP data recovery processes may be performed for the AM DRBs used for transmitting the data to be transmitted, which may be set by those skilled in the art according to actual situations;

RLC (Radio Link Control, radio link layer control) entity re-establishing all DRBs;

the RLC entity for reconstructing the DRB for transmitting the data to be transmitted may, alternatively, in the embodiment of the present application, reconstruct RLC entities of all DRBs, or reconstruct RLC entities of only DRBs for transmitting the data to be transmitted, which may be set by a person skilled in the art according to actual situations;

the default configuration of the first signaling radio bearer SRB1 and/or the default configuration of the second signaling radio bearer SRB2 specified in the application protocol, specifically, SRB is a radio bearer carrying signaling transmission;

default configuration of MAC (Media Access Control, media control access) specified in the application protocol;

CCCH (Common Control Channel ) configuration specified in the application protocol;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

Correspondingly, in the embodiment of the present application, the network side performs communication configuration with the UE, so that the UE performs corresponding transmission configuration on at least one layer, including performing at least one step as follows:

restoring stored access layer context related information of the UE;

reestablishing radio link layer control protocol (RLC) entities of all DRBs interacted with the UE;

a default configuration specified in a first signaling radio bearer, SRB1, and/or a second signaling radio bearer, SRB2, application protocol, interacting with the UE;

a PDCP entity reconstructing a radio resource bearer SRB1 interacted with the UE and/or a PDCP entity reconstructing SRB2;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

After the corresponding transmission configuration is carried out on at least one layer, the inactive state UE enters a state capable of receiving and transmitting data, and transmits user plane data to a network side according to configuration information, optionally, the user plane data can be transmitted to the network side according to the following modes:

1) Transmitting the user plane data to a network side through uplink resources preconfigured for resident cells by the network side;

2) And transmitting the user plane data to a network side in a message AMSGA or a message 3MSG3 through a special random access resource.

Optionally, the UE may transmit the user plane data to the network side by using a stored security key and/or a security algorithm recovered by the UE to protect the user plane data, and another possible implementation manner is that the UE performs security key update based on the stored security key, which is not limited herein.

Correspondingly, the network side equipment receives the user plane data transmitted by the UE according to the configuration information, and the method comprises the following steps:

Receiving user plane data transmitted by the UE in a message AMSGA or a message 3MSG3 through a special random access resource;

similarly, the UE may transmit the user plane data to the network side by using the stored security key and/or the security algorithm recovered by the UE to protect the user plane data, and another possible implementation manner is that the UE performs security key update based on the stored security key, which is not limited herein.

In the foregoing two small data transmission schemes that do not accompany RRC signaling, the scenario in which the UE sends the user plane data to the network side is also applicable to the scenario in which the UE sends the user plane data to the network side device through other manners in the embodiment of the present application, which is not described herein in detail.

Optionally, after the UE sends user plane data to the network side device, the UE monitors a preset physical downlink control channel PDCCH scrambled by using a dedicated identifier RNTI allocated to the UE, and receives, by monitoring the PDCCH, a message sent by the network side device, including but not limited to, indicating that the UE falls back to an inactive state and enters a state where data transmission and reception are not performed.

When the UE transmits the user plane data to the network side according to the configuration information, and when the user plane data to be transmitted is determined not to be transmitted, the UE transmits corresponding indication information to the network side, wherein the process of transmitting the corresponding indication information to the network side comprises the following steps:

1) When the last data packet to be transmitted is transmitted, transmitting indication information to a network side through an MAC layer or a physical layer to indicate that the data packet is the last data packet or no data to be transmitted exists;

specifically, when the indication information is sent to the network side device through the MAC layer, the indication information may be sent to the network side device through the MAC message when the last data packet is sent, where the indication information indicates that the data packet is the last data packet or that the UE does not have data to be transmitted, and when the indication information is sent to the network side through the physical layer, the indication information may be sent to the network side device through the PDCCH when the last data packet is sent, where the indication information indicates that the data packet is the last data packet or that the UE does not have data to be transmitted.

2) Transmitting indication information to a network side through an MAC or a physical layer to indicate that no data to be transmitted exists;

specifically, when determining that data transmission is no longer performed, when sending the indication information to the network side through the MAC layer or the physical layer, it may be indicated that there is no data to be transmitted by sending the indication information to the network side through the MAC message or the PDCCH, which is not described herein.

3) And sending indication information to the network through the MAC layer or the physical layer to indicate the UE to fall back to an inactive state and not to transmit and receive data.

Specifically, when determining that data transmission is no longer performed, the UE decides to fall back to an inactive state and does not perform data transmission and reception, and then sends indication information to the network side through the MAC layer or the physical layer to indicate that the UE falls back to the inactive state and does not perform data transmission and reception.

Correspondingly, when the network side equipment receives the user plane data which is determined to be no longer to be transmitted by the UE, the sent corresponding indication information comprises:

Optionally, the UE may instruct to fall back to the inactive state and not perform data transceiving any more by itself, or instruct, according to the instruction information sent by the network side device, the UE to fall back to the inactive state and not perform data transceiving any more, that is, one implementation manner is that the UE may fall back to the inactive state and not perform data transceiving any more after sending the instruction information, without waiting for the network side acknowledgement message, and another implementation manner is that the UE may fall back to the inactive state and not perform data transceiving any more after waiting for the network side acknowledgement message after sending the instruction information. Specifically, before the UE is instructed to fall back to the inactive state according to the instruction information sent by the network side device and does not perform data transceiving, the UE may send the above several corresponding instruction information to the network side;

optionally, after the UE transmits the user plane data to the network side according to the configuration information, the UE may decide to switch to a state of not performing data transceiving by itself, including the following ways:

1) Determining whether to fall back to a state of non-activated state and not receiving and transmitting data through the RRC layer;

2) Determining whether to fall back to a state of non-activated state and not receiving and transmitting data according to the instruction of a higher layer through an RRC layer;

3) And determining whether to fall back to a state of non-activated state and not receiving and transmitting data by the RRC layer according to the instruction of the MAC layer.

Optionally, the UE decides to fall back to the inactive state and does not perform data transceiving by itself may include, but is not limited to, the RRC layer determining and deciding whether to fall back to the inactive state and does not perform data transceiving, or the higher layer determining whether to fall back to the inactive state and does not perform data transceiving and notifies the RRC layer by the indication information according to the transmission data state or the like, or the MAC layer determining whether to fall back to the inactive state and does not perform data transceiving and notifies the RRC layer by the indication information according to the buffered data state or the like.

As another optional implementation manner, the network side device may instruct the UE to fall back to the inactive state and not perform data transceiving through RRC message, MAC message or physical layer message, or as an optional implementation manner, after receiving the indication information of the user plane data that is no longer to be transmitted and sent by the UE, the network side may send corresponding indication information to the UE, specifically, the network side device determines whether the UE is required to fall back to the inactive state and not perform data transceiving according to the service state, or the like, and when receiving 1) and 2) of the indication information of the user plane data that is no longer to be transmitted and sent by the UE, instructs the UE to fall back to the inactive state and not perform data transceiving through RRC message, MAC message or physical layer message, or when receiving the indication information of the UE to fall back to the inactive state and not perform data transceiving, for example, 3) of the indication information of the user plane data that is no longer to be transmitted, the network side does not need to fall back to the inactive state and does not need to send the UE to the inactive state through RRC message, MAC message or physical layer message, or does not implement the data transceiving of the UE to fall back to the inactive state through RRC message.

Optionally, after the UE transmits the user plane data to the network side according to the configuration information, the network side indicates the updated pre-configured dedicated resource through the RRC message, the MAC message, or the physical layer message, so as to update the pre-configured resource, and instruct the UE to perform data transceiving with the dedicated resource subsequently.

Correspondingly, the network side receives the user plane data transmitted by the UE according to the configuration information, and the method further comprises the following steps:

Optionally, after determining to fall back to the inactive state and not transmit and receive data, the UE performs at least one of the following steps:

resetting the MAC layer configuration;

releasing default MAC configuration in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

Specifically, after determining that the UE is in a state of not transmitting and receiving data in the inactive state, the UE may execute any one of the above steps, or may execute any combination of the above steps, and those skilled in the art may set the foregoing steps according to actual needs, which is not described herein.

Correspondingly, after the network side equipment indicates the UE to fall back to a state of non-activated state and not receiving and transmitting data, at least one of the following steps is executed:

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

and saving the context of the UE.

As shown in fig. 2, in the embodiment of the present invention, a flow chart of a method for executing user plane data transmission by combining network side equipment and a user terminal specifically includes:

step S201, UE determines to trigger transmission of user plane data to network side equipment;

the UE triggers the transmission of user plane data to the network side equipment in the following manner:

Optionally, determining whether the current resident cell is the last accessed cell before the UE enters the inactive state, if so, determining whether to trigger transmission of user plane data to the network side equipment according to the conditions, otherwise, triggering and executing an RRC recovery process to request to enter a connection state;

Step S202, UE performs corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state;

step S203, UE transmits user plane data to network side equipment according to the configuration information;

optionally, the UE may send user plane data to the network side in the message a MSGA or the message 3MSG3 through an uplink resource or a dedicated random access resource preconfigured by the network side device for the terminal;

specifically, after the UE sends user plane data to the network side through an uplink resource such as PUSCH resource preconfigured by the network side for the terminal, the UE may receive information sent by the network side device by monitoring a preset physical downlink control channel PDCCH scrambled by using a preset radio network temporary identifier RNTI allocated to the UE;

step S204, when the UE determines that the user plane data to be transmitted is no longer available, the UE sends indication information to the network side equipment;

step S205, when the network side equipment receives user plane data which is determined to be no longer to be transmitted by the UE, the network side equipment optionally sends corresponding indication information to the UE;

step S206, the UE returns to the inactive state and does not transmit and receive data any more according to the self indication or the received indication information of the network side equipment;

Optionally, when the network side device sends the indication information to the UE, the network side device may also indicate the updated preconfigured dedicated resource to the UE through an RRC message, a MAC message, or a physical layer message;

in step S207, after determining that the UE is in a state of not receiving and transmitting data in the inactive state, optionally, if the network side indicates that the UE updates the preconfigured dedicated resource, the UE adjusts the corresponding configuration.

Specific examples of the user plane data transmission method are given below from the point of view of UE and network side device interaction.

Example 1: the UE acts when triggering w/o RRC signaling small data transmission, as shown in fig. 3:

in step S301, the RRC layer determines that w/o RRC signaling small data transmission is triggered, and the UE performs corresponding transmission configuration on at least one layer to enter a transmit data state and/or a receive data state, and specifically performs at least one of the following:

restoring stored access layer context related information in an inactive state;

Reconstructing radio link layer control protocol (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

Step S302, UE transmits the user plane data to a network side according to configuration information; including any of the following:

Optionally, after sending the small data, the UE may monitor a preset physical downlink control channel PDCCH scrambled with a preset radio network temporary identifier RNTI allocated to the UE, so as to receive information sent by the network side device.

Example 2: the processing flow after the UE finishes transmitting the small data to the network side is as shown in fig. 4:

step S401, UE transmits the user plane data to a network side according to configuration information;

step S402, when it is determined that the user plane data to be transmitted is no longer available, sending indication information to the network side, wherein the indication information includes at least one of the following:

Step S403, when receiving the UE determines that the UE no longer has user plane data to be transmitted, the corresponding indication information is sent, where the indication information includes at least one of the following:

If the network side receives the notification from the UE side, and determines that the UE is in the inactive state and does not send and receive the indication information of the data, the network side knows that the UE is in the inactive state and does not send and receive the data, and the network side does not need to send signaling again to notify the UE that is in the inactive state and does not send and receive the data, and another implementation mode is that the network side needs to send signaling again to notify the UE that is in the inactive state and does not send and receive the data to confirm the request of the UE.

It should be noted that, before or along with the indication information informing the UE to fall back to the inactive state and not transmit or receive data, the network side may update the pre-configured resource for the UE by carrying the updated pre-configured dedicated resource through the RRC, MAC or physical layer.

Example 3: the UE rolls back to the inactive state and does not perform data transceiving any more:

when the network side receives user plane data which is determined not to be transmitted any more by the UE, the network side sends corresponding indication information which indicates the UE to fall back to an inactive state and not to transmit and receive data any more, and the UE executes at least one of the following:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

Example 4: the UE internally triggers user plane data transmission, as shown in fig. 5, including:

step S501, the RRC layer of the UE performs w/o RRC signaling small data transmission according to the self indication, or the indication of a higher layer, or the indication of an MAC layer;

step S502, UE transmits the user plane data to a network side according to configuration information;

step S503, the bottom layer completes the user plane data transmission;

step S504, after finishing user plane data transmission, UE returns to inactive state according to the instruction and does not transmit and receive data any more, comprising at least one step as follows:

Example 5: the method for determining whether to trigger transmission of user plane data according to whether the current resident cell is the last accessed cell before the UE enters the inactive state, as shown in fig. 6, includes:

step S601, the UE waits for the data to be transmitted to determine whether the current resident cell is the last accessed cell before the UE enters the inactive state, if so, the step S602 is executed, otherwise, the step S603 is executed;

step S602, UE triggers to transmit user plane data to a network side;

step S603, triggering the RRC recovery procedure to enter a connected state.

Example 2

Based on the same inventive concept, the embodiment of the invention also provides a user plane data transmission method, and because the method corresponds to the method corresponding to the user terminal for user plane data transmission 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. 7, a flowchart of a user plane data transmission method provided in an embodiment of the present invention specifically includes the following steps:

step S701, when triggering to transmit user plane data to a network side, corresponding transmission configuration is performed on at least one layer to enter a data sending state and/or a data receiving state, wherein the UE is in an inactive state;

step S702, transmitting the user plane data to a network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by radio resource control RRC signaling.

restoring stored access layer context related information in an inactive state;

reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

Restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

Based on the same inventive concept, the embodiment of the invention also provides a user plane data transmission method, and because the method corresponds to the method corresponding to the network side equipment for user plane data transmission in the embodiment of the invention, and the principle of solving the problem of 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 user plane data transmission method provided in an embodiment of the present invention specifically includes the following steps:

step S801, performing communication configuration for a UE, so that the UE performs corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, where the UE is an inactive UE;

Step S802, receiving user plane data transmitted by the UE according to the configuration information, where the UE transmits the user plane data without accompanying radio resource control RRC signaling.

restoring stored access layer context related information of the UE;

Recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

And receiving user plane data transmitted by the UE in the message A MSGA or the message 3MSG3 through a special random access resource.

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

And saving the context of the UE.

Example 3

The method for transmitting user plane data in the present invention is described above, and the user equipment performing the above user plane data transmission is described below.

Referring to fig. 9, a ue for transmitting user plane data in an embodiment of the present application includes: at least one processor 901 and at least one memory 902, and a bus system 909;

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

Fig. 9 is a schematic diagram of a ue for transmitting user plane data according to an embodiment of the present application, where the network side device 900 may have relatively large differences due to different configurations or performances, and may include one or more processors (in english: central processing units, english: CPU) 901 (for example, one or more processors) and a memory 902, and one or more storage media 903 (for example, one or more mass storage devices) storing application 904 or data 905. Wherein the memory 902 and the storage medium 903 may be transitory or persistent. The program stored in the storage medium 903 may include one or more modules (not shown), each of which may include a series of instruction operations in the information processing apparatus. Still further, the processor 901 may be arranged to communicate with a storage medium 903 and to execute a series of instruction operations in the storage medium 903 on the user terminal 900.

The user terminal 900 may also include one or more wired or wireless network interfaces 907, one or more input/output interfaces 908, and/or one or more operating systems 906, such as Windows Server, mac OS X, unix, linux, freeBSD, etc.

restoring stored access layer context related information in an inactive state;

reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

The method for transmitting user plane data in the present invention is described above, and the network side device for executing the user plane data transmission is described below.

Referring to fig. 10, in an embodiment of the present application, a network side device for user plane data transmission includes: at least one processor 1001 and at least one memory 1002, and a bus system 1009;

Fig. 10 is a schematic diagram of a network side device for user plane data transmission according to an embodiment of the present application, where the network side device 1000 may have relatively large differences due to different configurations or performances, and may include one or more processors (in english: central processing units, in english: CPU) 1001 (for example, one or more processors) and a memory 1002, and one or more storage media 1003 (for example, one or more mass storage devices) storing application programs 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.

restoring stored access layer context related information of the UE;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

Restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

Storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

and saving the context of the UE.

The network side device and the user terminal for user plane data transmission in the embodiments of the present application are described above from the viewpoint of hardware processing, and the user terminal and the network side device for user plane data transmission in the embodiments of the present application are described below from the viewpoint of a modularized functional entity.

Referring to fig. 11, a ue for transmitting user plane data according to an embodiment of the present invention includes:

a first configuration unit 1101, configured to perform corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state when triggering transmission of user plane data to a network side, where the UE is an inactive state UE;

a first transmission unit 1102 is configured to transmit the user plane data to a network side according to configuration information, where transmission of the user plane data is not accompanied by radio resource control RRC signaling.

Optionally, the first configuration unit is configured to trigger transmission of user plane data to a network side, specifically configured to:

Optionally, the first configuration unit is configured to perform corresponding transmission configuration on at least one layer to enter a sending data state and/or a receiving data state, and includes performing at least one step as follows:

restoring stored access layer context related information in an inactive state;

Reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

Optionally, the first transmission unit is configured to transmit the user plane data to a network side according to configuration information, and specifically is configured to:

Optionally, the first transmission unit is configured to, after transmitting the user plane data to the network side according to the configuration information, further be configured to:

Optionally, the first transmission unit is configured to send indication information to the network side when determining that user plane data is no longer to be transmitted, and is specifically configured to:

Optionally, after the first transmission unit is configured to determine that the data is not transmitted and received in the inactive state, at least one of the following steps is performed:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

Suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

the context of the UE is saved.

Referring to fig. 12, a network side device for user plane data transmission according to an embodiment of the present invention includes:

a second configuration unit 1201, configured to perform communication configuration for a UE, so that the UE performs corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, where the UE is an inactive UE;

a second transmission unit 1202, configured to receive user plane data transmitted by the UE according to the configuration information, where the UE transmits the user plane data without accompanying radio resource control RRC signaling.

Optionally, the second configuration unit is configured to perform communication configuration with the UE, so that the UE performs corresponding transmission configuration on at least one layer, and includes performing at least one step as follows:

restoring stored access layer context related information of the UE;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression RoHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

Optionally, the second transmission unit is configured to receive user plane data transmitted by the UE according to the configuration information, and specifically is configured to:

Optionally, the second transmission unit is configured to receive corresponding indication information sent when the UE determines that user plane data to be transmitted is no longer available, and specifically is configured to:

Optionally, the second transmission unit is configured to receive user plane data transmitted by the UE according to the configuration information, and is further configured to:

Optionally, after the second transmission unit is configured to instruct the UE to fall back to the inactive state and no longer perform data transceiving, at least one of the following steps is performed:

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the secret key;

preserving the ROHC state;

preserving the mapping relation between Qos flow and DRB;

and saving the context of the UE.

The embodiment of the invention also provides a computer readable storage medium, which comprises instructions, when running on a computer, for causing the computer to execute the method for transmitting user plane data provided by the 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 transmitting user plane data 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 this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. 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., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing has described in detail the technical solutions provided herein, and specific examples have been used to illustrate the principles and embodiments of the present application, where the above examples are only used to help understand the methods and core ideas of the present application; meanwhile, as those skilled in the art will have modifications 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 user plane data transmission method applied to a user terminal UE, comprising:

transmitting the user plane data to a network side according to configuration information, wherein the transmission of the user plane data is not accompanied by Radio Resource Control (RRC) signaling;

the UE transmits the user plane data to a network side according to the configuration information and comprises the following steps:

when the user plane data to be transmitted is determined not to be needed, sending indication information to a network side; or the receiving network side indicates the UE to fall back to an inactive state through the RRC message or the MAC message or the physical layer message and does not transmit and receive data any more;

The RRC layer determines whether to fall back to an inactive state and not transmit and receive data, or determines whether to fall back to the inactive state and not transmit and receive data according to the indication information of a higher layer, or determines whether to fall back to the inactive state and not transmit and receive data according to the indication information of the MAC layer.

2. The method of claim 1, wherein triggering transmission of user plane data to a network side comprises:

3. A method according to claim 1 or 2, characterized in that triggering the transmission of user plane data to the network side comprises:

4. Method according to claim 1, characterized in that the entry into the transmit data state and/or into the receive data state of the respective transmission configuration is performed at least one layer, comprising performing at least one of the following steps:

restoring stored access layer context related information in an inactive state;

reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression ROHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

5. The method according to claim 1 or 4, wherein transmitting the user plane data to a network side according to configuration information comprises:

6. The method of claim 1, further comprising, after transmitting the user plane data to a network side according to configuration information:

7. The method of claim 1, wherein sending the indication information to the network side when it is determined that the user plane data to be transmitted is no longer available comprises:

Transmitting indication information to a network side through an MAC layer or a physical layer to indicate that no data to be transmitted exists; or alternatively

8. The method of claim 1, further comprising, after transmitting the user plane data to a network side according to configuration information:

9. The method of claim 1, wherein after determining to fall back to a state in which data is not transmitted and received in the inactive state, at least one of:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the security key;

preserving the ROHC state;

storing the mapping relation between QoS flow and DRB;

the context of the UE is saved.

10. The user plane data transmission method is applied to network side equipment and is characterized by comprising the following steps:

Receiving user plane data transmitted by the UE according to configuration information, wherein the UE transmits the user plane data without Radio Resource Control (RRC) signaling;

the network side equipment receives user plane data transmitted by the UE according to the configuration information and also comprises the following steps:

receiving corresponding indication information sent when the UE determines that user plane data to be transmitted is no longer available; or the UE is instructed to fall back to an inactive state through an RRC message, a MAC message or a physical layer message and does not transmit and receive data any more;

the UE determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer, or determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer according to an instruction of a higher layer, or determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer according to an instruction of an MAC layer.

11. The method of claim 10, wherein the communicating with the UE to configure the UE for corresponding transmission at the at least one layer comprises performing at least one of:

restoring stored access layer context related information of the UE;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression ROHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

12. The method of claim 10, wherein receiving the user plane data transmitted by the UE according to the configuration information comprises:

13. The method according to claim 10, wherein receiving the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted, comprises:

Receiving indication information sent by the UE to a network side through an MAC layer or a physical layer, wherein the indication information is used for indicating that no data to be transmitted exists; or alternatively

14. The method of claim 10, wherein receiving the UE's user plane data transmitted according to the configuration information, further comprises:

15. The method of claim 10, wherein at least one of the following steps is performed after the UE is instructed to fall back to an inactive state and no longer transmit or receive data:

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the security key;

preserving the ROHC state;

storing the mapping relation between QoS flow and DRB;

and saving the context of the UE.

16. A user terminal for user plane data transmission, comprising: a memory, a processor, the memory storing a computer program;

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

when triggering to transmit user plane data to a network side, corresponding transmission configuration is carried out on at least one layer to enter a data sending state and/or a data receiving state, wherein the user terminal UE is in an inactive state;

17. The ue of claim 16, wherein the processor is configured to trigger transmission of user plane data to a network side, specifically configured to:

18. The ue according to claim 16 or 17, wherein the processor is configured to trigger transmission of user plane data to a network side, specifically configured to:

19. The user terminal according to claim 16, wherein the processor is configured to enter a transmit data state and/or a receive data state in at least one layer with a corresponding transmission configuration, comprising performing at least one of the following steps:

restoring stored access layer context related information in an inactive state;

reconstructing radio link layer control (RLC) entities of all DRB;

recovering SRB1 and/or SRB2;

restoring the stored RRC configuration;

restoring the stored robustness header compression ROHC state;

restoring the mapping rule of the stored QoS flow and DRB;

restoring the stored security keys and/or security algorithms;

20. The ue according to claim 16 or 19, wherein the processor is configured to transmit the user plane data to a network side according to configuration information, specifically configured to:

21. The ue of claim 16, wherein the processor is configured to, after transmitting the ue data to a network side according to configuration information, further:

22. The ue of claim 16, wherein the processor is configured to send indication information to a network side when determining that there is no more user plane data to be transmitted, specifically configured to:

23. The ue of claim 16, wherein the processor is configured to, after transmitting the ue data to a network side according to configuration information, further:

24. The user terminal of claim 16, wherein the processor is configured to perform at least one of the following steps after determining to fall back to a state in which the data is not transmitted or received in an inactive state:

Resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

RLC entity re-establishing SRB1 and/or RLC entity re-establishing SRB 2;

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the security key;

preserving the ROHC state;

storing the mapping relation between QoS flow and DRB;

the context of the UE is saved.

25. A network side device for user plane data transmission, comprising: a memory, a processor, the memory storing a computer program;

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

the receiving the user plane data transmitted by the UE according to the configuration information further includes:

26. The network side device of claim 25, wherein the processor is configured to perform communication configuration with a UE to enable the UE to perform corresponding transmission configuration in at least one layer, and comprising performing at least one of the following steps:

restoring stored access layer context related information of the UE;

recovering SRB1 and/or SRB2 interacted with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robust header compression ROHC state of the UE;

restoring the stored mapping rule of the QoS flow and the DRB of the UE;

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

27. The network side device of claim 25, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and specifically configured to:

28. The network side device of claim 25, wherein the processor is configured to receive corresponding indication information sent when the UE determines that user plane data is no longer to be transmitted, specifically configured to:

29. The network side device of claim 25, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and further configured to:

30. The network side device of claim 25, wherein the processor is configured to perform at least one of the following steps after instructing the UE to fall back to an inactive state and no longer perform data transceiving:

suspending the current DRB and/or SRB1 and/or SRB2 configuration;

storing the security key;

preserving the ROHC state;

storing the mapping relation between QoS flow and DRB;

and saving the context of the UE.

31. A user terminal for user plane data transmission, the user terminal comprising:

the first configuration unit is used for performing corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state when triggering the transmission of user plane data to a network side, wherein the user terminal UE is in an inactive state;

a first transmission unit, configured to transmit the user plane data to a network side according to configuration information, where transmission of the user plane data is not accompanied by radio resource control RRC signaling;

a first state determining unit, configured to send indication information to a network side when determining that user plane data to be transmitted is no longer available; or the receiving network side indicates the UE to fall back to an inactive state through the RRC message or the MAC message or the physical layer message and does not transmit and receive data any more; the RRC layer determines whether to fall back to an inactive state and not transmit and receive data, or determines whether to fall back to the inactive state and not transmit and receive data according to the indication information of a higher layer, or determines whether to fall back to the inactive state and not transmit and receive data according to the indication information of the MAC layer.

32. A network side device for user plane data transmission, the network side device comprising:

a second transmission unit, configured to receive user plane data transmitted by the UE according to the configuration information, where the UE transmits the user plane data without accompanying radio resource control RRC signaling;

a second state determining unit, configured to receive corresponding indication information sent when the UE determines that user plane data to be transmitted is no longer available; or the UE is instructed to fall back to an inactive state through an RRC message, a MAC message or a physical layer message and does not transmit and receive data any more; the UE determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer, or determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer according to an instruction of a higher layer, or determines whether to fall back to a state of not transmitting and receiving data in an inactive state through an RRC layer according to an instruction of an MAC layer.

33. 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 9 or to perform the method of any one of claims 10 to 15.