CN113498081A

CN113498081A - User plane data transmission method, user terminal and network side equipment

Info

Publication number: CN113498081A
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: 2021-10-12
Anticipated expiration: 2040-04-02
Also published as: CN113498081B; WO2021197103A1

Abstract

The invention provides a method for transmitting user plane data, a user terminal and network side equipment, comprising the following steps: when triggering the user plane data transmission to the network side, carrying 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 in an inactive state; and transmitting user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by Radio Resource Control (RRC) signaling. The invention can carry out configuration transmission on at least one layer when triggering the UE to send the user plane data to the network side equipment, so that the UE transmits the user plane data according to the configuration information, and solves 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.

Description

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

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a user plane data transmission method, a user terminal, and a network side device.

Background

The NR 17 introduces a small data transmission scheme, that is, when a 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 small data sending in the RRC inactive state, so that the UE can be prevented from frequently entering an 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, which includes two modes, 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 small data is transmitted along with RRC signaling, 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, the network side can obtain the context of the UE subsequently according to the received RRC resume request message, and the UE is further indicated to enter a connection state, an idle state or an inactive state; when small data is transmitted by using w/o RRC signaling, namely, no additional RRC message is carried outside the small data packet to be transmitted sent by the UE for the first time.

For the current w/o RRC signaling small data transmission scheme, since the procedure of small data transmission is only limited and does not accompany RRC signaling, but how the corresponding RRC layer handles when the w/o RRC signaling small data transmission scheme is executed, there is no specific scheme at present.

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 how to process when a corresponding RRC layer in a w/o RRC signaling small data transmission scheme is executed.

According to a first aspect of an embodiment of the present application, a user plane data transmission method is provided, which is applied to a user terminal, and the method includes:

when triggering the user plane data transmission to the network side, carrying 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 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 by 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

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

And the RRC layer determines whether to trigger the transmission of the 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 non-activated 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 the connected state.

Optionally, configuring corresponding transmission in at least one layer to enter a data sending state and/or a data receiving state, including performing at least one of the following steps:

the default parameters of the physical layer one L1 in the application protocol do not include the L1 parameters in the system information broadcast message;

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

rebuilding a packet data convergence protocol PDCP entity of all data radio bearer DRBs or executing a data recovery process of PDCP of all acknowledged mode AM DRBs;

rebuilding a PDCP entity of the DRB for transmitting the data to be transmitted or executing a PDCP data recovery process;

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

resuming the suspended DRB or resuming the suspended DRB for transmitting the 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 as specified in the application protocol;

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

common control channel CCCH configuration specified in an application protocol;

re-establishing the PDCP entity of the SRB1 and/or re-establishing the PDCP entity of the SRB 2;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

configuring a bottom layer by an 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

The user plane data is transmitted to the network side in message AMSGA or message 3MSG3 via dedicated random access resources.

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

monitoring a preset physical downlink control channel PDCCH scrambled by using a preset radio network temporary identifier RNTI allocated to the UE.

and when determining that the user plane data is not transmitted any more, sending indication information to the network side.

Optionally, when it is determined that there is no user plane data to be transmitted, sending indication information to the network side, where the sending indication information includes:

when the last data packet to be transmitted is sent, indication information is sent to a network side through an MAC layer or a physical layer to indicate that the data packet is the last data packet or data to be transmitted does not exist; or

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

And sending indication information to the network side through the MAC layer or the physical layer to indicate that the UE falls back to the non-activated state and does not transmit and receive data any more.

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

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

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

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

and receiving the updated pre-configured dedicated resources indicated by the RRC message or the MAC message or the physical layer message from the network side.

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

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

According to a second aspect of the embodiments of the present application, there is provided a user plane data transmission method applied to a network side device, the method including:

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, wherein the UE is in an inactive state;

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

Optionally, performing communication configuration with a UE, so that the UE performs corresponding transmission configuration in at least one layer, including performing at least one of the following steps:

restoring the stored access stratum context-related information of the UE;

reestablishing a Packet Data Convergence Protocol (PDCP) entity of all data resource bearing DRBs interacted with the UE or executing a data recovery process of PDCPs of all Acknowledged Mode (AM) DRBs;

reestablishing a PDCP entity of a DRB for transmitting data to be transmitted, which interacts with the UE, or performing a PDCP data recovery process;

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

reestablishing an RLC entity which interacts with the UE and is used for transmitting the DRB of the data to be transmitted;

resuming the suspended DRB interacted with the UE or resuming the suspended DRB used for transmitting the data to be transmitted;

a default configuration is specified in a first signaling radio bearer (SRB 1) and/or a second signaling radio bearer (SRB 2) application protocol that interacts with the UE;

re-establishing the PDCP entity of the SRB1 and/or re-establishing the PDCP entity of the SRB2 interacting with the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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;

configuring the bottom layer of the UE to use integrity protection and ciphering.

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

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

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

and receiving corresponding indication information sent when the UE determines that the user plane data is not transmitted any more.

Optionally, receiving corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted, the indication information includes:

receiving indication information sent to a network side through 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 has no data to be transmitted; or

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

And receiving indication information sent to the network side by the UE through the MAC layer or the physical layer, wherein the indication information is used for indicating the UE to return to the non-activated state and not to receive and send data any more.

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

and the UE is instructed to fall back to the inactive state and not to transmit and receive data any more through an RRC message, an MAC message or a physical layer message.

indicating the updated pre-configured dedicated resource to the UE through an RRC message, a MAC message, or a physical layer message.

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

reestablishing an RLC entity of SRB1 and/or reestablishing an RLC entity of SRB2 interacting with the UE;

reestablishing a PDCP entity of the SRB1 and/or reestablishing a PDCP entity of the SRB2 interacting with the UE;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

According to a third aspect of the embodiments of the present application, there is provided a user terminal for user plane data transmission, including: the computer system comprises a memory and a processor, wherein a computer program is stored in the memory;

the processor is used for reading the program in the memory and executing:

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

Optionally, the processor is configured to perform corresponding transmission configuration in at least one layer to enter a data sending state and/or a data receiving state, and includes performing at least one of the following steps:

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

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

The user plane data is transmitted to the network side in message a MSGA or message 3MSG3 via dedicated random access resources.

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

Optionally, the processor is configured to send, when it is determined that there is no user plane data to be transmitted, indication information to a network side, and specifically, to:

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

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

According to a fourth aspect of the embodiments of the present application, a network side device for user plane data transmission is provided, including: the computer system comprises a memory and a processor, wherein a computer program is stored in the memory;

the processor is used for reading the program in the memory and executing:

Optionally, the processor is configured to perform communication configuration with a UE, so that the UE performs corresponding transmission configuration in at least one layer, including performing at least one of the following steps:

restoring the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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 configured to:

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

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

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

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

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

a first configuration unit, 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 the first transmission unit is used for 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.

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

a second configuration unit, 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 a second transmission unit, configured to receive user plane data transmitted by the UE according to the configuration information, where the user plane data transmitted by the UE is not accompanied by RRC signaling.

According to a seventh aspect of the embodiments of the present application, there is provided a chip, where the chip is coupled with a storage unit in a user equipment, so that the chip invokes, when running, program instructions stored in the storage unit, to implement the above aspects of the embodiments of the present application and any method that may be involved in the aspects.

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

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

In addition, for technical effects brought by any one implementation manner of the second aspect to the ninth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect, and details are not described here.

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 that:

according to the user plane data transmission method, the user terminal and the network side equipment provided by the invention, when the user plane data is sent to the network side equipment by triggering the UE, 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 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 is solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

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

fig. 5 is a schematic diagram illustrating a method for triggering user plane data transmission inside a UE according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a method for determining whether to trigger transmission of user plane data according to whether a current camped cell is a cell that is accessed last 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 schematic flow chart 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 clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.

The NR system designs 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 an 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 UE inactive state, the UE in the inactive state can perform relevant connection operation based on the AS layer context in the UE inactive state in the process of restoring the air interface connection with the RAN side, thereby effectively reducing signaling interaction and enabling the UE to rapidly enter the connection state.

The UE enters the connected state from the inactive state through an RRC recovery (RRC resume) procedure, which includes the following specific procedures:

firstly, a random access process is triggered, UE sends an RRC resume request message to a network side, specifically, the UE carries the RRC resume request message through MSG3 to request the network to recover the RRC connection of the UE, the RRC resume request message also comprises a UE identifier of the UE in an inactive state, so that the network side can obtain the context of the UE through the UE identifier, and the network side informs the UE to enter a connected state through the RRC resume message carried in MSG 4. And the UE sends the MSG5 message carrying the RRC resume complete message to the network side to complete the RRC resume process, and after the RRC connection is established between the UE and the network side, the data is sent to the network side through the allocated uplink resources.

In the existing small data transmission scheme, the UE sends small data in an RRC inactive state, which includes 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 transmitting small data along with RRC signaling, 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 together, the network side can obtain the context of the UE subsequently according to the received RRC resume request message, and further indicates the UE to enter a connection state, an idle state or an inactive state; when small data is transmitted by using w/o RRC signaling, namely, no additional RRC message is carried outside the small data packet to be transmitted sent by the UE for the first time.

For the current w/o RRC signaling small data transmission scheme, since the process of small data transmission is only limited and does not accompany with RRC signaling, but how the corresponding RRC layer handles when the w/o RRC signaling small data transmission scheme is executed, and how the behavior and subsequent states of the UE after sending small data are handled, there is no specific scheme at present.

Based on the above problems, embodiments of the present application provide a user plane data transmission method, which is used to solve the above problems. The following describes embodiments of the present invention with reference to the drawings.

Example 1

In the description process, the implementation of the user plane data transmission system from the terminal and the network side respectively is described, and then an example of the 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 in cooperation or separately, and actually, when the terminal and the network are implemented separately, the problems on the terminal side and the network side are solved separately, and when the two are used in combination, a better technical effect is obtained.

As shown in fig. 1, a user plane data transmission system provided for the embodiment of the present application includes:

the system comprises a user terminal UE101, a data transmission module and a data transmission module, wherein the user terminal UE101 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 user plane data transmission to a network side, and 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 by Radio Resource Control (RRC) signaling.

A network side device 102, configured to perform communication configuration for a user equipment 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 accompanying Radio Resource Control (RRC) signaling.

At present, in a w/o RRC signaling small data transmission scheme, because a small data transmission process is only limited and does not accompany with RRC signaling, but how a corresponding RRC layer handles when the w/o RRC signaling small data transmission scheme is executed, and how a behavior and a subsequent state of the UE after sending small data are handled, there is no specific scheme at present.

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

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

optionally, when the RRC layer detects that the UE stores the user plane data to be transmitted to the network side device, the RRC layer itself determines to trigger transmission of the user plane data to the network side device. The user plane data sent by the UE refers to specific data sent by the UE to the network side device, and may include, but is not limited to, 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 without an RRC signaling, and no additional RRC message is carried except for a small data packet to be transmitted. For example, the RRC determines whether a small data transmission condition triggering non-accompanied RRC signaling is satisfied, and if so, triggers a small data transmission procedure not accompanied RRC signaling.

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

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

3) And determining whether to trigger the transmission of the user plane data to the network side or not through the RRC layer according to the indication of the media access control MAC layer.

Optionally, if the RRC receives an instruction sent by the MAC layer that the UE transmits the user plane data to the network side device, the RRC layer determines to trigger transmission of the user plane data to the network side according to the instruction 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 a data transmission process that triggers without an RRC signaling is satisfied according to a state of the data to be transmitted, and if so, the MAC layer instructs the RRC to trigger a data transmission process that does not accompany the RRC signaling, otherwise, the MAC layer may instruct the RRC to trigger an RRC connection recovery process.

The UE may be determined to trigger transmission of user plane data to the network side device by any one of the above manners, or alternatively, the UE may be determined to trigger transmission of user plane data to the network side device by a combination of any two of the above manners, for example, when the RRC determines that a data transmission condition not accompanied by RRC signaling is satisfied, the RRC layer determines whether to trigger transmission of user plane data to the network side by a data process not accompanied by RRC signaling by itself, or indicates that the RRC triggers a data transmission process not accompanied by RRC signaling by an upper layer, the RRC layer triggers transmission of user plane data to the network side by a data process not accompanied by RRC signaling according to the indication of the upper layer, or determines that the data transmission process not accompanied by RRC signaling is satisfied by MAC to indicate that the RRC triggers a data transmission process not accompanied by RRC signaling by the RRC layer, and the RRC layer determines to trigger transmission of user plane data to the network side according to the indication of the MAC layer, only a few examples of the combination of the above modes are given here, and those skilled in the art can set the modes according to actual situations, which are not described herein again.

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

When the UE enters the inactive state, although an air interface connection corresponding to an 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 camped cell is not a cell corresponding to the UE entering the inactive state, the UE may be affected by the process of transmitting user plane data to the network side device, for example, the network pre-configures, when notifying the UE entering the inactive state, an uplink resource available in the cell, for example, a PUSCH resource, for the UE, and when the camped cell of the UE is no longer the cell, the UE will no longer have an available pre-configured uplink resource in the inactive state, and the UE needs to trigger an RRC process for the network to acquire the context of the UE, so the UE cannot trigger a small data transmission process without an RRC signaling. Then, the RRC recovery process is triggered to be executed to switch to the connected state, and when the UE establishes connection with the network side device, the UE sends user plane data to the network side according to the prior art.

When it is determined to trigger transmission of user plane data to a network side, performing corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, optionally, performing corresponding transmission configuration on the at least one layer may be performing corresponding transmission configuration on one layer in a protocol, or may also 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, a corresponding layer may be selected to be configured according to a type of current user plane data to be transmitted, or a transmission requirement, and the like, and a skilled person may set according to an actual situation, which is not limited herein.

restoring the stored context related information of the access layer in the inactive state, wherein the context related information is used for restoring the configuration information stored by the network side and the UE side;

reconstructing a Packet Data Convergence Protocol (PDCP) entity of all DRBs (Data radio bearer) or performing a Data recovery process of all PDCP entities of an AM DRB in an acknowledged mode, where a DRB is used for carrying user plane Data, and a PDCP is a short for Packet Data Convergence Protocol and is responsible for compressing and decompressing an IP header, transmitting user Data, maintaining the user Data as a serial number of a lossless radio bearer, performing encryption, decryption, and integrity protection;

optionally, in the embodiment of the present application, all the PDCP entities of the DRBs may be rebuilt or all the PDCP data recovery processes of the AM DRBs in the acknowledged mode may be executed, or only the PDCP entity of the DRBs used for transmitting the data to be transmitted may be rebuilt or only the AM DRB used for transmitting the data to be transmitted may be executed, and a person skilled in the art may set the data recovery process according to an actual situation;

re-establishing RLC (Radio Link Control) entities of all DRBs;

the RLC entities of the DRBs used for transmitting the data to be transmitted are reconstructed, optionally, in this embodiment of the present application, the RLC entities of all DRBs may be reconstructed, or only the RLC entities of the DRBs used for transmitting the data to be transmitted may be reconstructed, and a person skilled in the art may set the RLC entities according to an actual situation;

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

a default configuration of a Media Access Control (MAC) specified in an application protocol;

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

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

Correspondingly, in this embodiment of the present application, a network side performs communication configuration with a UE, so that the UE performs corresponding transmission configuration in at least one layer, including performing at least one of the following steps:

restoring the stored access stratum 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;

reestablishing a PDCP entity of the radio resource bearer SRB1 and/or reestablishing a PDCP entity of the SRB2 interacting with the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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 performed on the at least one layer, the UE in the inactive state enters a state capable of receiving and transmitting data, and transmits user plane data to the network side according to the configuration information, and optionally, may transmit the user plane data to the network side according to the following manner:

1) transmitting the user plane data to a network side through an uplink resource pre-configured for the resident cell by the network side;

2) the user plane data is transmitted to the network side in message AMSGA or message 3MSG3 via dedicated random access resources.

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

Correspondingly, the receiving, by the network side device, the user plane data transmitted by the UE according to the configuration information includes:

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

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

In the above two small data transmission schemes without 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 in other manners in this embodiment, and details are not repeated here.

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 identity RNTI allocated to the UE, and receives a message sent by the network side device by monitoring the PDCCH, where the message includes but is not limited to indicating that the UE falls back to an inactive state and enters a state where data transceiving is not performed.

When the UE transmits the user plane data to the network side according to the configuration information and determines that the user plane data to be transmitted does not exist any more, 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 sent, indication information is sent to a network side through an MAC layer or a physical layer to indicate that the data packet is the last data packet or data to be transmitted does not exist;

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 an MAC message when the last data packet is sent to indicate 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 to indicate that the data packet is the last data packet or that the UE does not have data to be transmitted.

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

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

3) And sending indication information to the network side through the MAC layer or the physical layer to indicate that the UE falls back to the non-activated state and does not transmit and receive data any more.

Specifically, when it is determined that data transmission is no longer performed, the UE determines to fall back to the inactive state and does not perform data transceiving, and then sends the 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 transceiving.

Correspondingly, when the network side device receives the user plane data that is determined by the UE to be transmitted, the corresponding indication information sent by the network side device includes:

Optionally, the UE may return to the inactive state and no longer perform data transceiving by itself, or may instruct the UE to return to the inactive state and no longer perform data transceiving according to indication information sent by the network side device, that is, one implementation manner is that the UE may return to the inactive state and no longer perform data transceiving after sending the indication information, and does not need to wait for a network side acknowledgement message, and another implementation manner is that the UE may return to the inactive state and no longer perform data transceiving after waiting for the network side acknowledgement message after sending the indication information. Specifically, before the UE returns to the inactive state according to the indication information sent by the network side device and does not receive or transmit data any more, the UE may send the above several corresponding indication 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 receiving and transmitting data by itself, which includes the following modes:

1) determining whether to return to an inactive state and not to receive and transmit data through an RRC layer;

2) determining whether to return to an inactive state and not to receive and transmit data or not through an RRC layer according to the indication of a high layer;

3) and determining whether to return to the state of non-activated state and not to transmit and receive data by the RRC layer according to the indication of the MAC layer.

Optionally, the UE determines to fall back to the inactive state and no longer perform data transceiving by itself, which may include but is not limited to determining and determining by the RRC layer whether to fall back to the inactive state and no longer perform data transceiving, or determining by the higher layer whether to fall back to the inactive state and no longer perform data transceiving and notifying the RRC layer by indication information according to a data transmission state and the like, or determining by the MAC layer whether to fall back to the inactive state and no longer perform data transceiving and notifying the RRC layer by indication information according to a data caching state and the like.

As another optional implementation, the network side device may instruct, through an RRC message, a MAC message, or a physical layer message, the UE to fall back to an inactive state and not perform data transceiving, and as an optional implementation, the network side device may also send corresponding indication information to the UE after receiving the indication information of the user plane data no longer to be transmitted, where specifically, the network side device determines, according to a service state and the like, whether the UE needs to fall back to the inactive state and not perform data transceiving, and when receiving the indication information of the user plane data no longer to be transmitted, which is sent by the UE, 1) and 2), and instructs, through the RRC message, the MAC message, or the physical layer message, the UE to fall back to the inactive state and not perform data transceiving any more, or when receiving the indication information of the UE returning to the inactive state, for example, when the network side receives 3) of the indication information of the user plane data no longer to be transmitted, learns that the UE returns to the inactive state and does not perform data transceiving any more When data is transmitted and received, the network side does not need to instruct the UE to return to the state of non-active state for not transmitting and receiving data through RRC message, MAC message or physical layer message, or the network side of another implementation mode also needs to instruct the UE to return to the state of non-active state for not transmitting and receiving data through sending RRC message, MAC message or physical layer message acknowledgement.

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 an RRC message, an MAC message, or a physical layer message, so as to update the pre-configured resource, and indicate the UE to subsequently perform data transceiving using the dedicated resource.

Correspondingly, the network side receives the user plane data transmitted by the UE according to the configuration information, and further includes:

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

resetting the MAC layer configuration;

releasing the default MAC configuration in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

Specifically, after determining that the UE falls back to the inactive state and does not receive and transmit data, the UE may perform any one of the above steps, or may perform several combined steps.

Correspondingly, after the network side device instructs the UE to fall back to the inactive state and not to receive and transmit data, at least one of the following steps is performed:

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

As shown in fig. 2, a flowchart of a method for performing user plane data transmission by cooperation of a network side device and a user terminal in an embodiment of the present invention specifically includes:

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

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

Optionally, determining whether the current resident cell is a cell accessed last before the UE enters the inactive state, if so, determining whether to trigger transmission of user plane data to the network side device, and otherwise, triggering execution of an RRC recovery procedure to request entry into the connected state;

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

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

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

specifically, after the UE sends user plane data to the network side through an uplink resource, such as a 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 is not transmitted any more, the UE sends indication information to the network side equipment;

step S205, when the network side device receives the UE determines that there is no user plane data to be transmitted, optionally, the network side sends corresponding indication information to the UE;

step S206, the UE returns to the non-activated state and does not receive and send data according to the indication of the UE 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 further indicate the updated preconfigured dedicated resource to the UE through an RRC message, an MAC message, or a physical layer message;

step S207, after the UE determines to fall back to the inactive state and does not receive and transmit data, optionally, if the network side instructs the UE to update the preconfigured dedicated resource, the UE adjusts the corresponding configuration.

A specific example of the user plane data transmission method is given below from the perspective of interaction between the UE and the network side device.

Example 1: the behavior of the UE when the UE triggers w/o RRC signaling small data transmission is shown in fig. 3:

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

reestablishing radio link layer control protocol (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

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

Optionally, after the UE sends the small data, the UE may monitor a preset physical downlink control channel PDCCH scrambled by using 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 transmits the small data to the network side is as shown in fig. 4:

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

step S402, when determining that there is no user plane data to be transmitted, sending indication information to the network side, where the indication information includes at least one of the following:

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

It should be noted that, if the network side receives the notification from the UE side and determines that the UE falls back to the inactive state and does not receive and send the indication information of the data receiving state, the network side knows that the UE falls back to the inactive state and does not receive and send the data, and the network side may not need to send a signaling again to notify the UE to fall back to the inactive state and does not receive and send the data, and the other implementation manner is that the network side needs to send a signaling again to notify the UE to fall back to the inactive state and does not receive and send the data to confirm the request of the UE.

The network side may carry the dedicated resource for updating the pre-configured resource for the UE through RRC, MAC, or physical layer before or along with the indication information for notifying the UE to fall back to the inactive state and not to transmit or receive data.

Example 3: the UE falls back to the inactive state and does not perform data transceiving action:

when the network side receives the user plane data which is determined by the UE to be transmitted, the corresponding indication information is sent to indicate the UE to return to the non-activated state and not to transmit and receive data any more, and the UE executes at least one of the following steps:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

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

step S501, the RRC layer of the UE triggers to transmit w/o RRC signaling small data according to the instruction of the RRC layer, or the instruction of the high layer, or the instruction of the MAC layer;

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

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

step S504, after completing the user plane data transmission, the UE reverts to the inactive state according to the indication and does not perform data transceiving any more, including at least one of the following steps:

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

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

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

step S603, triggering execution of the RRC recovery procedure request to enter the connected state.

Example 2

Based on the same inventive concept, the embodiment of the present invention further provides a user plane data transmission method, and since the method corresponds to the method corresponding to the user terminal for user plane data transmission in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the user terminal, the implementation of the method can refer to the implementation of the user terminal, and repeated details are not repeated.

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 user plane data is triggered to be transmitted 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;

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 a Radio Resource Control (RRC) signaling.

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

Based on the same inventive concept, the embodiment of the present invention further provides a user plane data transmission method, and since the method corresponds to the method corresponding to the network side device for user plane data transmission in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the network side device, the implementation of the method can refer to the implementation of the network side device, and repeated details are not repeated.

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, 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 in an inactive state;

step S802, receiving user plane data transmitted by the UE according to the configuration information, wherein the user plane data transmitted by the UE is not accompanied by Radio Resource Control (RRC) signaling.

restoring the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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;

Receiving user plane data transmitted by the UE in message A MSGA or message 3MSG3 via dedicated random access resources.

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

Example 3

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

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

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

Fig. 9 is a schematic diagram of a user terminal for user plane data transmission according to an embodiment of the present application, where the network-side device 900 may have a relatively large difference due to different configurations or performances, and may include one or more processors (CPU) 901 (e.g., one or more processors) and a memory 902, and one or more storage media 903 (e.g., one or more mass storage devices) for storing applications 904 or data 905. Memory 902 and storage medium 903 may be, among other things, transient storage or persistent storage. The program stored in the storage medium 903 may include one or more modules (not shown), and each module may include a series of instruction operations in the information processing apparatus. Still further, the processor 901 may be configured to communicate with the storage medium 903, and 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.

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

The method for transmitting user plane data in the present invention is explained above, and a network side device for performing the user plane data transmission is explained 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 (CPU) 1001 (e.g., one or more processors) and a memory 1002, and one or more storage media 1003 (e.g., one or more mass storage devices) storing an application 1004 or data 1005. Wherein the memory 1002 and the storage medium 1003 may be transient storage or persistent storage. 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 in the information processing apparatus. 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 the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

The above describes a network side device and a user terminal for user plane data transmission in the embodiment of the present application from the perspective of hardware processing, and the following describes a user terminal and a network side device for user plane data transmission in the embodiment of the present application from the perspective of a modular functional entity.

Referring to fig. 11, a user terminal for user plane data transmission 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 transmitting unit 1102, configured to transmit the user plane data to a network side according to configuration information, where the transmission of the user plane data is not accompanied by RRC signaling.

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

Optionally, the first configuration unit is configured to perform corresponding transmission configuration in at least one layer to enter a data sending state and/or a data receiving state, and includes at least one of the following steps:

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

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

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

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

Optionally, after determining to fall back to the inactive state and not to transmit or receive data, the first transmission unit is configured to perform at least one of the following steps:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

Please refer to fig. 12, which illustrates a network device for user plane data transmission according to an embodiment of the present invention, wherein the network device 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 transmitting 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 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 in at least one layer, where the method includes performing at least one of the following steps:

restoring the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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 configured to:

Optionally, the second transmission unit is configured to receive corresponding indication information sent by the UE when it determines that there is no user plane data to be transmitted, and specifically 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, the second transmission unit is configured to, after instructing the UE to fall back to the inactive state and no longer perform data transceiving, perform at least one of the following steps:

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

An embodiment of the present invention further provides a computer-readable storage medium, which includes instructions, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the method for user plane data transmission provided in the foregoing embodiment.

An embodiment of the present application further provides a computer program product, which includes a computer program, where the computer program includes program instructions, and when the program instructions are executed by an electronic device, the electronic device is caused to execute the method for transmitting user plane data provided in the foregoing embodiment.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on 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 the present embodiment.

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

In the above embodiments, the implementation may be wholly or partially realized 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, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The technical solutions provided by the present application are introduced in detail, and the present application applies specific examples to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A user plane data transmission method is applied to a user terminal (UE), and is characterized by comprising the following steps:

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

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

4. The method according to claim 1, wherein configuring the respective transmission into the sending data state and/or the receiving data state at least one layer comprises performing at least one of the following steps:

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

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

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

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

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

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

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

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

12. The method according to claim 9 or 10, wherein after determining to fall back to the inactive state for not transceiving data, performing at least one of the following steps:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

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

14. The method of claim 13, wherein performing communication configuration with a UE to enable the UE to perform corresponding transmission configuration in at least one layer comprises performing at least one of the following steps:

restoring the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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;

15. The method of claim 13, wherein receiving user plane data transmitted by the UE according to the configuration information comprises:

16. The method of claim 13, wherein receiving user plane data transmitted by the UE according to the configuration information comprises:

17. The method of claim 16, wherein receiving the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted comprises:

18. The method of claim 13, wherein receiving user plane data transmitted by the UE according to the configuration information further comprises:

19. The method of claim 13, wherein receiving user plane data transmitted by the UE according to the configuration information further comprises:

20. The method of claim 18, wherein after instructing the UE to fall back to the inactive state and not 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;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

21. A user terminal for user plane data transmission, comprising: the computer system comprises a memory and a processor, wherein a computer program is stored in the memory;

the processor is used for reading the program in the memory and executing:

22. The ue of claim 21, wherein the processor is configured to trigger transmission of user plane data to a network side, and specifically configured to:

23. The ue of claim 21 or 22, wherein the processor is configured to trigger transmission of user plane data to a network side, and specifically is configured to:

24. The ue of claim 21, wherein the processor is configured to configure the corresponding transmission into the sending data state and/or the receiving data state in at least one layer, and further comprising performing at least one of the following steps:

reestablishing radio link layer control (RLC) entities of all DRBs;

rebuilding an RLC entity of a DRB for transmitting data to be transmitted;

common control channel CCCH configuration specified in an application protocol;

restored SRB1 and/or SRB 2;

recovering the stored RRC configuration;

restoring the stored robustness header compression RoHC state;

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

recovering the stored security key and/or security algorithm;

25. The ue of claim 21 or 24, wherein the processor is configured to transmit the user plane data to a network side according to configuration information, and specifically configured to:

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

27. The ue of claim 21, wherein the processor is configured to transmit the user plane data to a network side according to configuration information, and specifically configured to:

28. The ue of claim 27, wherein the processor is configured to send, to the network side, indication information when it is determined that there is no more user plane data to be transmitted, and specifically configured to:

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

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

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

32. The ue of claim 29 or 30, wherein the processor is configured to perform at least one of the following steps after determining to fall back to an inactive state for not transceiving data:

resetting the MAC layer configuration;

releasing the default configuration of the MAC in the protocol;

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

the context of the UE is saved.

33. A network side device for user plane data transmission, comprising: the computer system comprises a memory and a processor, wherein a computer program is stored in the memory;

the processor is used for reading the program in the memory and executing:

34. The network-side device of claim 33, wherein the processor is configured to communicate with a UE to configure the UE to perform corresponding transmission configuration in at least one layer, and wherein the method comprises performing at least one of the following steps:

restoring the stored access stratum context-related information of the UE;

restoring SRBs 1 and/or SRBs 2 interacting with the UE;

restoring the stored RRC configuration of the UE;

restoring the stored robustness 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;

35. The network-side device of claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and specifically configured to:

36. The network-side device of claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and specifically configured to:

37. The network-side device of claim 36, wherein the processor is configured to receive corresponding indication information sent by the UE when the UE determines that there is no more user plane data to be transmitted, and specifically configured to:

38. The network-side device of claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and further configured to:

39. The network-side device of claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and further configured to:

40. The network-side device of claim 38, wherein the processor is configured to instruct the UE to fall back to the inactive state and stop data transceiving, and then perform at least one of the following steps:

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

storing the secret key;

saving the ROHC state;

storing the mapping relation between the Qos flow and the DRB;

saving the context of the UE.

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

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

43. A computer-readable storage medium comprising computer program instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-13 or perform the method of any of claims 14-20.