WO2021197103A1

WO2021197103A1 - User plane data transmission method, user equipment and network device

Info

Publication number: WO2021197103A1
Application number: PCT/CN2021/081925
Authority: WO
Inventors: 许萌; 傅婧; 梁靖
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-04-02
Filing date: 2021-03-19
Publication date: 2021-10-07
Also published as: CN113498081A; CN113498081B

Abstract

The present disclosure provides a user plane data transmission method, a user equipment (UE) and a network device. The method comprises: when it is triggered to transmit user plane data to a network, perform corresponding transmission configuration on at least one layer to enter a data sending state and/or a data receiving state, and the UE is a UE in an inactive state; transmit the user plane data to the network according to the configuration information, wherein w/o RRC signaling of the user plane data is transmitted. According to the present disclosure, when the UE is triggered to send user plane data to a network device, configuration transmission is performed on at least one layer, so that the UE transmits the user plane data according to the configuration information, solving the problem in the w/o RRC signaling small-data transmission solution of how to process when a corresponding RRC layer is executed in the w/o RRC signaling small-data transmission solution.

Description

Method for transmitting user plane data, user equipment and network side equipment

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 02, 2020, the application number is 202010256816.6, and the application name is "a method for user plane data transmission and user terminal and network side equipment", all of which The content is incorporated in this application by reference.

Technical field

The present disclosure relates to the field of wireless communication technology, and in particular to a method for user plane data transmission, user equipment, and network side equipment.

Background technique

NR R17 will introduce a small data transmission scheme, that is, when the UE (User Equipment) is in the RRC (Radio Resource Control, radio resource control) inactive state (RRC INACTIVE), if the UE has small data to send, the UE will The RRC inactive state completes small data transmission, which can prevent the UE from frequently entering the RRC connected state and reduce signaling overhead.

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 without RRC signaling (that is, w/o RRC signaling). ) Transmission of small data transmission. When small data is transmitted with RRC signaling, the UE triggers the random access process, and sends an RRC resume (RRC resume) request message to the network side along with the small data packet to be transmitted, and the network side can subsequently obtain it according to the received RRC resume request message The context of the UE further instructs the UE to enter the connected state, idle state or inactive state; when using w/o RRC signaling to transmit small data, that is, the first time the UE sends the small data packet to be transmitted, no additional RRC message is carried.

For the current w/o RRC signaling small data transmission scheme, because the small data transmission process is only limited to not accompanied by RRC signaling, but how the corresponding RRC layer handles w/o RRC signaling small data transmission scheme execution, there is no specific plan.

Summary of the invention

The present disclosure provides a method for user plane data transmission, user equipment and network side equipment to solve how the corresponding RRC layer in the RRC signaling small data transmission scheme is processed when the RRC signaling small data transmission scheme is executed The problem.

According to a first aspect of the embodiments of the present disclosure, there is provided a user plane data transmission method, which is applied to a UE, and the method includes:

When the user plane data transmission to the network side is triggered, corresponding transmission configuration is performed on at least one layer to enter the data sending state and/or the data receiving state, and the UE is an inactive state UE;

The user plane data is transmitted to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.

Optionally, triggering the 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 instruction information of the higher layer; or

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

Determine whether the current camping cell is the last cell that the UE accesses before entering the inactive state, and if it is triggered to transmit user plane data to the network side;

Otherwise, it triggers the execution of the RRC recovery process to request to enter the connected state.

Optionally, performing corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state includes performing at least one of the following steps:

The default parameters of the physical layer one (L1) in the application protocol, excluding the L1 parameters in the system information broadcast message;

Restore the stored access layer context-related information in the inactive state;

Rebuild all data radio bearer (Data Radio Bearer, DRB) Packet Data Convergence Protocol (PDCP) entities or perform all Acknowledgement Mode (AM) DRB PDCP data recovery procedures;

Rebuild the PDCP entity of the DRB used to transmit the data to be transmitted or perform the PDCP data recovery process;

Rebuild all DRB radio link layer control (Radio Link Control, RLC) entities;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

Resume the suspended DRB or resume the suspended DRB used to transmit the data to be transmitted;

The default configuration of the first signaling radio bearer (Signalling Radio Bearer 1, SRB1) and/or the default configuration of the second signaling radio bearer (Signalling Radio Bearer 2, SRB2) specified in the application protocol;

The default configuration of MAC specified in the application protocol;

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

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored Robust Header Compression (RoHC) state;

Restore the mapping rules between the stored Quality of Service (QoS) flow and DRB;

Recover stored security keys and/or security algorithms;

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

The RRC layer instructs the bottom layer to transmit the data to be transmitted.

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

Transmit the user plane data to the network side through the uplink resource pre-configured for the terminal on the network side; or

Through dedicated random access resources, the user plane data is transmitted to the network side in message A (MSGA) or message 3 (MSG3).

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

Monitor a preset physical downlink control channel ((Physical Downlink Control Channel, PDCCH) scrambled using a preset radio network temporary identifier (RNTI) allocated for the UE.

When it is determined that there is no more user plane data to be transmitted, the instruction information is sent to the network side.

Optionally, when it is determined that there is no more user plane data to be transmitted, the instruction information is sent to the network side, including:

When sending the last data packet to be transmitted, send indication information to the network side through the MAC layer or the physical layer to indicate that the data packet is the last data packet or there is no data to be transmitted; or

Send indication information to the network side via MAC or physical layer to indicate that there is no data to be transmitted; or

Send indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception.

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data; or

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data according to the instructions from the upper layer; or

The RRC layer determines whether to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information of the MAC layer.

The receiving network side instructs the UE to fall back to the inactive state and no longer perform data transmission and reception through an RRC message, a MAC message, or a physical layer message.

The updated pre-configured dedicated resource indicated by the network side through the RRC message or the MAC message or the physical layer message is received.

Optionally, after determining to roll back to the inactive state without sending and receiving data, perform at least one of the following steps:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

According to a second aspect of the embodiments of the present disclosure, a user plane data transmission method is provided, which is applied to a network side device, and the method includes:

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

Receiving 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.

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

Restore the stored access stratum context related information of the UE;

Reestablishing PDCP entities of all DRBs interacting with the UE or performing PDCP data recovery procedures of all AM DRBs;

Reestablishing a PDCP entity interacting with the UE and used for transmitting the data to be transmitted DRB or performing a PDCP data recovery process;

Rebuild the RLC entities of all DRBs interacting with the UE;

Rebuild the RLC entity interacting with the UE and used to transmit the DRB to be transmitted;

Resume the suspended DRB interacting with the UE or resume the suspended DRB used to transmit data to be transmitted;

The default configuration specified in the SRB1 and/or SRB2 application protocol that interacts with the UE;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

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

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

Receiving the user plane data transmitted by the UE through the uplink resource pre-configured for the camping cell on the network side; or

Receive user plane data transmitted by the UE in MSGA or MSG3 through dedicated random access resources.

Receiving the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted.

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

Receive the indication information sent to the network side through the MAC layer or the physical layer when the UE sends the last data packet to be transmitted, the indication information is used to indicate that the data packet is the last data packet or there is no data to be transmitted ;or

Receiving indication information sent by the UE to the network side through the MAC or physical layer, where the indication information is used to indicate that there is no data to be transmitted; or

Receiving indication information sent by the UE to the network side through the MAC layer or the physical layer, where the indication information is used to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception.

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

The RRC message, MAC message, or physical layer message instructs the UE to fall back to the inactive state and no longer perform data transmission and reception.

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

Optionally, after instructing the UE to return to the inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

Reestablishing the RLC entity of SRB1 that interacts with the UE and/or reestablishing the RLC entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

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

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

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

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

The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the instruction information of the MAC layer.

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

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

Rebuild the PDCP entities of all DRBs or perform the data recovery process of PDCP of all AM DRBs;

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

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

The user plane data is transmitted to the network side in MSGA or MSG3 through dedicated random access resources.

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

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.

Optionally, the processor is configured to send instruction information to the network side when determining that there is no more user plane data to be transmitted, specifically for:

Optionally, the processor is configured to perform at least one of the following steps after determining the state of returning to the inactive state and not transmitting and receiving data:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

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

The processor is used to read the 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, including performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Rebuild the RLC entities of all DRBs interacting with the UE;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

Restore 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 configuration information, and is 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 is specifically configured to:

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

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

Optionally, after the processor is configured to instruct the UE to return to the inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a UE for user plane data transmission, and the UE includes:

The first configuration unit is used to trigger the corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state when the user plane data is transmitted to the network side, and the UE is an inactive state UE;

The first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.

According to a sixth aspect of the embodiments of the present disclosure, a network-side device for user plane data transmission is provided, and the network-side device includes:

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

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

According to a seventh aspect of the embodiments of the present disclosure, there is provided a chip that is coupled with a storage unit in a user equipment, so that the chip invokes program instructions stored in the storage unit during operation to implement the embodiments of the present disclosure The above aspects and any possible methods involved in each aspect.

According to an eighth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided. The computer storage medium stores program instructions, which when run on a computer, cause the computer to execute the above-mentioned aspects and aspects of the embodiments of the present disclosure. Any method that may be involved.

According to a ninth aspect of the embodiments of the present disclosure, there is provided a computer program product, which when the computer program product runs on an electronic device, causes the electronic device to execute and implement the above-mentioned aspects of the embodiments of the present disclosure and any aspects involved in each aspect. One possible method.

In addition, the technical effects brought about by any one of the implementation manners of the second aspect to the ninth aspect can be referred to the technical effects brought about by the different implementation manners of the first aspect, which will not be repeated here.

Utilizing a user plane data transmission method, user equipment, and network side equipment provided by the present disclosure has the following beneficial effects:

The present disclosure provides a user plane data transmission method, user equipment and network side equipment, which can be configured to transmit at least one layer when the UE is triggered to send user plane data to the network side equipment, so that the UE transmits according to the above configuration information User plane data, to solve the problem of how the corresponding RRC layer in the w/o RRC signaling small data transmission solution is processed during the implementation of the w/o RRC signaling small data transmission solution.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is a schematic diagram of a user plane data transmission system provided by an embodiment of the disclosure;

2 is a schematic flowchart of a user plane data transmission method provided by an embodiment of the disclosure;

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 disclosure;

4 is a schematic diagram of a processing flow after the UE transmits small data to the network side according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of a method for triggering user plane data transmission within a UE according to an embodiment of the disclosure;

FIG. 6 is a schematic diagram of a method for determining whether to trigger the transmission of user plane data according to whether the current camping cell is the last cell that the UE accesses before entering the inactive state according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of a user plane data transmission method provided by an embodiment of the disclosure;

FIG. 8 is a schematic flowchart of a user plane data transmission method provided by an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a user equipment for user plane data transmission according to an embodiment of the disclosure;

FIG. 10 is a schematic diagram of a network-side device for user plane data transmission according to an embodiment of the disclosure;

FIG. 11 is a schematic diagram of a user equipment for user plane data transmission according to an embodiment of the disclosure;

FIG. 12 is a schematic diagram of a network side device for user plane data transmission according to an embodiment of the disclosure.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

The term "and/or" in the embodiments of the present disclosure describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone These three situations. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

The application scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art will know that with the development of new application scenarios It appears that the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems. Wherein, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

The NR system has designed three RRC states: idle (RRC_IDLE) state, connected (RRC_CONNECTED) state and inactive (RRC_INACTIVE) state. Among them, 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 temporarily hangs. Since both the UE side and the radio access network (Radio Access Network, RAN) side store the AS layer context of the UE in the inactive state, the inactive UE can be based on the UE inactive state during the process of restoring the connection to the air interface on the RAN side. Performing related connection operations in the context of the lower AS layer can effectively reduce signaling interaction and enable the UE to quickly enter the connected state.

The UE entering the connected state from the inactive state is completed through the RRC resume process. The specific process of the inactive UE entering the connected state is as follows:

First, the random access process is triggered. The UE sends an RRC resume request message to the network side. Specifically, the UE carries the above RRC resume request message through MSG3 to request the network to resume the RRC connection of the UE. The above RRC resume request message also contains the UE’s non- The UE identity in the active state allows the network side to obtain the context of the UE through the UE identity, and the network side informs the UE to enter the connected state by carrying an RRC resume message in message 4 (MSG4). The UE sends a message 5 (MSG5) message carrying an RRC resume complete message to the network side to complete the RRC resume process. After the UE establishes an RRC connection with the network side, it sends data to the network side through the allocated uplink resources.

In the existing small data transmission scheme, the UE sending small data in the RRC inactive state includes two methods, including the small data transmission method accompanied by RRC signaling transmission, and the small data transmission method without RRC signaling (that is, w/o RRC signaling) transmission. Data transmission method. When small data is transmitted with RRC signaling, the UE triggers the random access process and sends the RRC resume request message together with the small data packet to be transmitted to the network side, and the network side can subsequently obtain the context of the UE according to the received RRC resume request message , And further instruct the UE to enter the connected state, idle state or inactive state; when using w/o RRC signaling to transmit small data, that is, the first time the UE sends the small data packet to be transmitted, no additional RRC message is carried.

For the current w/o RRC signaling small data transmission scheme, since the small data transmission process is only limited to not accompanied by RRC signaling, how does the corresponding RRC layer handle w/o RRC signaling small data transmission scheme execution, and UE sends There is no specific plan for how to deal with the behavior after small data and the subsequent state.

Based on the above-mentioned problems, embodiments of the present disclosure provide a user plane data transmission method to solve the above-mentioned problems. The specific embodiments of the present disclosure will be described below with reference to the accompanying drawings.

Example 1

In the description process, the implementation of the user plane data transmission system from the UE and the network side will be described respectively, and then an example of the implementation of the two will also be given to better understand the implementation of the solutions given in the embodiments of the present disclosure. This way of explanation does not mean that the two must be implemented together or implemented separately. In fact, when the UE and the network are implemented separately, they also solve the problems of the UE side and the network side respectively, and when the two are used in combination, they will Get better technical results.

As shown in FIG. 1, a user plane data transmission system provided by an embodiment of the present disclosure includes:

UE101, used to trigger transmission of user plane data to the network side, perform corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state, the UE is an inactive state UE; transmit to the network side according to the configuration information The user plane data, wherein the transmission of the user plane data is not accompanied by RRC signaling.

The network side device 102 is configured to perform communication configuration for the UE, so that the UE performs corresponding transmission configuration in at least one layer to enter the data sending state and/or the data receiving state, the UE is an inactive UE; The 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 RRC signaling.

At present, w/o RRC signaling small data transmission scheme, because the small data transmission process is only limited to not accompanied by RRC signaling, but how the corresponding RRC layer handles w/o RRC signaling small data transmission scheme execution, and how the UE sends small data There is no specific solution for the behavior after the data and the subsequent state. The embodiment of the present disclosure proposes that when the UE triggers the transmission of user plane data to the network side, the corresponding transmission configuration is performed on at least one layer to enter the inactive data transmission and reception state. After that, the user plane data is transmitted to the network side according to the above configuration information, and the specific scheme for processing the RRC layer in the w/o RRC signaling small data transmission scheme is given.

In the embodiments of the present disclosure, when the UE triggers the transmission of user plane data to the network side device, the following methods are included:

1) The RRC layer itself determines whether to trigger the transmission of user plane data to the network side device;

Optionally, when the RRC layer detects that the UE has stored user plane data for transmission to the network side device, the RRC layer itself determines to trigger the transmission of the user plane data to the network side device. The user plane data sent by the UE above refers to the specific data sent by the UE to the network-side device, which may include but is not limited to the small data mentioned in the embodiments of the present disclosure. The small data sent by the UE to the network-side device is not accompanied by The small data transmission process of RRC signaling does not carry additional RRC messages except for the small data packets to be transmitted. For example, RRC judges whether the small data transmission condition not accompanied by RRC signaling is satisfied, and if it is satisfied, it triggers the small data transmission process not accompanied by RRC signaling.

2) The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the instructions of the higher layer;

Optionally, if the RRC receives an instruction from a higher layer to transmit user plane data from a UE to a network side device, the RRC layer determines whether to trigger a data transmission process without RRC signaling according to the higher layer's instruction, for example, the higher layer notifies the RRC layer to trigger A data transmission process that is not accompanied by RRC signaling, or notify RRC to trigger an RRC recovery process to restore the RRC connection and enter the connected state to transmit user plane data to the network side.

3) The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the instructions of the MAC layer.

Optionally, if the RRC receives an instruction from the MAC layer to transmit user plane data to the network side device, the RRC layer determines to trigger the transmission of user plane data to the network side according to the MAC layer instruction. Optionally, when the MAC layer detects that the UE stores user plane data to be transmitted, or when the MAC layer detects that the UE receives user plane data, the MAC layer determines to trigger the UE to transmit user plane data to the network side device. For example, the MAC layer judges whether it is satisfied to trigger the data transmission process without RRC signaling according to the state of the data to be transmitted. If it is satisfied, the MAC layer instructs RRC to trigger the data transmission process without RRC signaling, otherwise the MAC layer may instruct the RRC trigger RRC connection recovery process.

It can be determined by any of the above methods that the UE triggers the transmission of user plane data to the network side device. Optionally, it can also be determined by a combination of any of the above methods to determine that the UE triggers the transmission of user plane data to the network side device, for example, the RRC judges and determines When the data transmission conditions not accompanied by RRC signaling are met, the RRC layer itself determines whether to trigger a data process not accompanied by RRC signaling to transmit user plane data to the network side, or the higher layer instructs RRC to trigger a data transmission process not accompanied by RRC signaling , The RRC layer triggers the data process without RRC signaling to transmit user plane data to the network according to the instructions of the higher layer, or MAC determines that the data transmission process without RRC signaling is satisfied, and instructs RRC to trigger the data without RRC signaling. During the transmission process, the RRC layer determines to trigger the transmission of user plane data to the network side according to the instructions of the MAC layer. Here are only a few examples of the combination of the above methods. Those skilled in the art can make settings according to the actual situation. Do not repeat it.

When the user plane data transmission to the network side is triggered as described above, corresponding transmission configuration is performed on at least one layer to enter the data sending state and/or the data receiving state. At this time, the UE is an inactive UE. Optionally, when the above conditions for triggering the transmission of user plane data to the network side are met, determine whether the current camping cell is the corresponding cell when the UE enters the inactive state, and if it is and the user plane data transmission conditions are met, trigger to the network side Transmit user plane data.

When the UE enters the inactive state, although the air interface connection corresponding to the AS of the UE is temporarily suspended. However, both the UE side and the RAN side save the AS layer context of the UE in the inactive state. At this time, if the current camping cell is not the corresponding cell when the UE enters the inactive state, the UE will transmit the user plane to the network side device. The data process has an impact. For example, when the network notifies the UE to enter the inactive state, the UE pre-configures the uplink resources available in the cell, such as Physical Uplink Shared Channel (PUSCH) resources. In this cell, the UE will no longer have available pre-configured uplink resources in the inactive state. The UE needs to trigger the RRC process for the network to obtain the context of the UE, so the UE cannot trigger small data transmission without RRC signaling process. At this time, the execution of the RRC recovery process is triggered to switch to the connected state, and when the UE establishes a connection with the network side device, the user plane data is sent to the network side using the existing technology.

When it is determined to trigger the transmission of user plane data to the network side, corresponding transmission configuration is performed on at least one layer to enter the data sending state and/or the data receiving state. Optionally, the above-mentioned corresponding transmission configuration in at least one layer may be corresponding transmission configuration in one of the layers of the protocol, or corresponding transmission configuration in multiple different layers in the protocol, and multiple different layers are in the protocol. Different layers are obtained by the combination of various layers. Specifically, the corresponding layer may be selected for configuration according to the current type of user plane data to be transmitted, or transmission requirements, etc. Those skilled in the art can make settings according to actual conditions, which are not limited here. In the embodiment of the present disclosure, the UE performs corresponding transmission configuration on at least one layer to enter the data transceiving state, including performing at least one of the following steps:

Restore the stored access stratum context-related information in the inactive state, which is used to restore the configuration information stored on the network side and the UE side;

Rebuild the PDCP entities of all DRBs or perform the data recovery process of PDCP of all AM DRBs. Among them, DRB is used to carry user plane data. PDCP is an abbreviation for packet data convergence protocol, which is responsible for compressing and decompressing IP headers and transmitting user data And maintain the serial number of the lossless radio bearer, and perform encryption, decryption, and integrity protection;

Rebuild the PDCP entity of the DRB used to transmit the data to be transmitted or perform the PDCP data recovery process. Optionally, in the embodiments of the present disclosure, the PDCP entity of all DRBs can be reconstructed or the PDCP data recovery process of all AM DRBs can be performed. It is possible to reconstruct only the PDCP entity used to transmit the data to be transmitted or only perform the PDCP data recovery process on the AM DRB used to transmit the data to be transmitted, which can be set by those skilled in the art according to the actual situation;

Rebuild all RLC entities of DRB;

The RLC entity used to transmit the DRB to be transmitted is reconstructed. Optionally, in the embodiments of the present disclosure, the RLC entity of all DRBs can be reconstructed, or only the RLC entity used to transmit the DRB to be transmitted can be reconstructed. Techniques in the art The personnel can set according to the actual situation;

The default configuration of SRB1 and/or the default configuration of SRB2 specified in the application protocol. Specifically, SRB is a radio bearer that carries signaling transmission;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

Correspondingly, in the embodiment of the present disclosure, the communication configuration between the network side and the UE so that the UE performs corresponding transmission configuration on at least one layer includes performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Rebuild the RLC entities of all DRBs interacting with the UE;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

After performing corresponding transmission configuration in at least one layer above, the inactive state UE enters a state where it can send and receive data, and transmits user plane data to the network side according to the configuration information. Optionally, the user plane data can be transmitted to the network side in the following manner:

1) The user plane data is transmitted to the network side through the uplink resources pre-configured for the camping cell on the network side;

2) The user plane data is transmitted to the network side in MSGA or MSG3 through dedicated random access resources.

Optionally, the user plane data transmitted by the UE to the network side may be user plane data protected by using the saved security key and/or security algorithm recovered by the UE. Another possible implementation is that the UE is based on the saved security key. The security key has been updated, which is not limited here.

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

Receiving user plane data transmitted by the UE in MSGA or MSG3 through dedicated random access resources;

Similarly, the user plane data transmitted by the UE to the network side may be user plane data protected by using the stored security key and/or security algorithm recovered by the UE. Another possible implementation method is that the UE performs the process based on the stored security key. In order to update the security key, it is not limited here.

The foregoing only presents the scenarios in which the UE sends user plane data to the network side in two small data transmission schemes that are not accompanied by RRC signaling. For the scenario in which the UE sends user plane data to the network side device in other ways, the embodiments of the present disclosure The same applies to, so I won’t repeat it here.

Optionally, after the UE sends user plane data to the network-side device, it monitors the preset PDCCH scrambled with the dedicated identifier RNTI allocated for the UE, and receives the message sent by the network-side device by monitoring the above-mentioned PDCCH, including but not limited to instructing the UE Return to the inactive state and enter a state where no data is sent or received, etc.

When the UE transmits the user plane data to the network side according to the configuration information, and when it determines that there is no more user plane data to be transmitted, it sends the corresponding instruction information to the network side. The process of sending the corresponding instruction information to the network side includes the following: item:

1) When sending the last data packet to be transmitted, send indication information to the network side through the MAC layer or the physical layer to indicate that the data packet is the last data packet or there is no data to be transmitted;

Specifically, when sending the indication information to the network-side device through the MAC layer, the indication information may be sent to the network-side device through a MAC message when the last data packet is sent to indicate that the above-mentioned data packet is the last data packet or the UE does not exist to be transmitted. Data; when sending indication information to the network side through the physical layer, when sending the last data packet, it may be sending indication information to the network side device through the PDCCH to indicate that the above data packet is the last data packet or the UE does not have data to be transmitted.

2) Send indication information to the network side via MAC or physical layer to indicate that there is no data to be transmitted;

Specifically, when it is determined that no data transmission is to be performed, when the above-mentioned 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 above-mentioned MAC message or PDCCH to indicate that there is no data to be transmitted. Do repeat.

3) Send indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception.

Specifically, when it is determined that data transmission is no longer being performed, the UE decides to fall back to the inactive state and no longer perform data transmission and reception, and then sends indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer Send and receive data.

Correspondingly, when the network side device receives the user plane data that the UE determines that there is no longer any user plane data to be transmitted, the corresponding indication information sent includes:

Optionally, the UE can return to the inactive state and no longer perform data transmission and reception through its own instructions, or instruct the UE to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information sent by the network side device, that is, The implementation method is that the UE can fall back to the inactive state and no longer perform data transmission and reception after sending the instruction information without waiting for the network side confirmation message. Another implementation method is that the UE can wait for the network side confirmation message after sending the instruction information. , And then fall back to the inactive state and no longer send and receive data. Specifically, the UE may first send the above-mentioned types of corresponding instruction information to the network side before instructing to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information sent by the network side device;

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 the state of not performing data transmission and reception by its own decision, including the following methods:

1) The RRC layer itself determines whether to fall back to the inactive state and not send and receive data;

2) The RRC layer determines whether to fall back to the inactive state and not send and receive data according to the instructions of the higher layers;

3) The RRC layer determines whether to fall back to the inactive state and not send and receive data according to the instructions of the MAC layer.

Optionally, the aforementioned UE's decision by itself to fall back to the inactive state and no longer perform data transmission and reception may include, but is not limited to, the RRC layer judging and deciding whether to fall back to the inactive state and no longer performing data transmission and reception, or the higher layer according to the transmission The data state and other judgments decide whether to fall back to the inactive state and no longer perform data transmission and reception, and notify the RRC layer through the instruction information, or the MAC layer determines whether to fall back to the inactive state and no longer perform data transmission and reception according to the cached data state, etc. Notify the RRC layer through the instruction information.

As another optional implementation manner, the network side device may instruct the UE to fall back to the inactive state and not perform data transmission and reception through an RRC message, MAC message, or physical layer message. As an optional implementation manner, the network side also After receiving the indication information from the UE indicating that there is no more user plane data to be transmitted, the corresponding indication information may be sent to the UE. Specifically, the network side device determines whether the UE needs to fall back to the inactive state according to the service status, etc. No more data transmission and reception, after receiving 1) and 2) of the indication information that the user plane data is no longer to be transmitted from the UE, and instructing the UE to fall back to the inactive state through the RRC message, MAC message or physical layer message And no more data transmission or reception, or when the network side receives the indication information sent by the UE to fall back to the inactive state, for example, when there is no more user plane data to be transmitted in the indication information in 3), it is learned that the UE has fallen back to the inactive state And no more data is sent and received, the network side does not need to use RRC messages, MAC messages, or physical layer messages to instruct the UE to fall back to the inactive state and not send and receive data, or in another implementation method, the network side also needs to send RRC The message, MAC message, or physical layer message confirmation instructs the UE to fall back to the inactive state and not send and receive data.

Optionally, after the UE transmits the user plane data to the network side according to the configuration information, the network side or through an RRC message, MAC message, or physical layer message indicates the updated pre-configured dedicated resources to update the pre-configured resources and instruct the UE to follow Use the above-mentioned dedicated resources to send and receive data.

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

Optionally, after the UE determines to fall back to the inactive state and does not send and receive data, it performs at least one of the following steps:

Reset the MAC layer configuration;

Release the default MAC configuration in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

Specifically, after the UE determines to fall back to the inactive state and does not send and receive data, it may perform any of the above steps, or may perform any combination of the above steps. Those skilled in the art can set according to actual needs. , I won’t repeat it here.

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

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

As shown in FIG. 2, a flowchart of a method for transmitting user plane data by a network-side device and a UE in an embodiment of the present disclosure includes:

Step S201, the UE determines to trigger the transmission of user plane data to the network side device;

Wherein, the UE triggers the transmission of user plane data to the network side device in the following manner:

Optionally, determine whether the current camping cell is the last cell that the UE accesses before entering the inactive state, if it is determined according to the above conditions whether to trigger the transmission of user plane data to the network side device, otherwise trigger the execution of the RRC recovery process to request to enter the connected state;

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

Step S203: The UE transmits user plane data to the network side device according to the configuration information;

Optionally, the UE may send user plane data to the network side in MSGA or MSG3 through uplink resources pre-configured for the terminal by the network side device, or dedicated random access resources;

Specifically, after the UE sends user plane data to the network side through the uplink resources pre-configured by the network side for the terminal, such as PUSCH resources, it can receive the network side equipment by monitoring the preset PDCCH scrambled with the preset RNTI allocated for the UE. Information sent;

Step S204: When the UE determines that there is no more user plane data to be transmitted, it sends instruction information to the network side device;

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

Step S206: The UE falls back to the inactive state and no longer performs data transmission and reception according to its own instruction or the received instruction information of the network side device;

Optionally, when the network side device sends indication information to the UE, it may also indicate the updated pre-configured dedicated resources to the UE through an RRC message, a MAC message, or a physical layer message;

Step S207: After the UE determines to fall back to the inactive state and does not send and receive data, optionally, if the network side instructs the UE to update the pre-configured dedicated resources, the UE adjusts the corresponding configuration.

A specific example of the user plane data transmission method is given below from the perspective of the 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, as shown in Figure 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 the data sending state and/or the data receiving state, and specifically performs at least one of the following:

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

Step S302: The UE transmits the user plane data to the network side according to the configuration information; this includes any of the following methods:

Optionally, after the UE sends the small data, it can monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE to receive the information sent by the network side device.

Example 2: The processing flow after the UE transmits small data to the network side, as shown in Figure 4:

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

Step S402: When the UE determines that there is no more user plane data to be transmitted, it sends instruction information to the network side. The instruction information includes at least one of the following:

Step S403: The network side device receives the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted. The above 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 the indication information that the UE has returned to the inactive state and does not send or receive data, the network side learns that the UE has returned to the inactive state and does not send or receive data. There may be no need to send signaling to notify the UE to fall back to the inactive state and not send and receive data. Another implementation method is that the network side needs to send another signaling to notify the UE to fall back to the inactive state and does not send or receive data to confirm the UE's request.

It should be noted that the network side can update the pre-configuration through RRC, MAC, or physical layer before notifying the UE to fall back to the inactive state and not sending and receiving data, or with the indication information that notifies the UE to fall back to the inactive state and not sending and receiving data. Dedicated resources for UE update pre-configured resources.

Example 3: The behavior of the UE falling back to the inactive state and no longer sending and receiving data:

When the network side receives the UE determining that there is no more user plane data to be transmitted, the corresponding indication information is sent to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception, and the UE performs at least one of the following:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

Example 4: The UE internally triggers user plane data transmission, as shown in Figure 5, including:

In step S501, the RRC layer of the UE triggers w/o RRC signaling small data transmission according to its own instruction, or an instruction from a higher layer, or an instruction from 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 user plane data transmission;

Step S504: After the user plane data transmission is completed, the UE returns to the inactive state according to the instruction and no longer performs data transmission and reception, including at least one of the following steps:

Example 5: A method for determining whether to trigger the transmission of user plane data according to whether the current camping cell is the last cell that the UE accessed before entering the inactive state, as shown in Figure 6, includes:

Step S601: When the UE has data to be transmitted, it is determined whether the cell currently camped on is the last cell that the UE accessed before entering the inactive state, if so, step S602 is executed, otherwise, step S603 is executed;

Step S602, the UE triggers the transmission of user plane data to the network side;

In step S603, the UE triggers the execution of the RRC recovery process to request to enter the connected state.

Example 2

Based on the same inventive concept, the embodiments of the present disclosure also provide a user plane data transmission method, because this method corresponds to the UE corresponding to the user plane data transmission method in the embodiment of the present disclosure, and the principle of the method to solve the problem is the same as that of the UE. The UE is similar, so the implementation of this method can refer to the implementation of the UE, and the repetition will not be repeated.

As shown in FIG. 7, a flow chart of a user plane data transmission method provided by an embodiment of the present disclosure specifically includes the following steps:

Step S701, when triggering the transmission of user plane data to the network side, perform corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state, and the UE is an inactive state UE;

Step S702: Transmit the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

Based on the same inventive concept, the embodiment of the present disclosure also provides a user plane data transmission method, because this method corresponds to the method corresponding to the network side device for user plane data transmission in the embodiment of the present disclosure, and the principle of the method to solve the problem It is similar to the network side device, so the implementation of this method can refer to the implementation of the network side device, and the repetition will not be repeated.

As shown in FIG. 8, a flow chart of a user plane data transmission method provided by an embodiment of the present disclosure specifically includes the following steps:

Step S801: Perform communication configuration for the UE, so that the UE performs corresponding transmission configuration in at least one layer to enter the data sending state and/or the data receiving state, and the UE is an inactive UE;

Step S802: 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.

Restore the stored access stratum context related information of the UE;

Rebuild the RLC entities of all DRBs interacting with the UE;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

Example 3

The foregoing describes a method of user plane data transmission in the present disclosure, and the following describes the user equipment that performs the foregoing user plane data transmission.

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

Wherein, a computer program is stored in the memory, and the processor is configured to read the program in the memory and execute:

Fig. 9 is a schematic diagram of a user equipment for user plane data transmission provided by an embodiment of the present disclosure. The UE 900 may have relatively large differences due to different configurations or performance, and may include one or more processors (full English name: central processing units). , English abbreviation: CPU) 901 (for example, one or more processors) and memory 902, and one or more storage media 903 (for example, one or more storage devices with a large amount of data) storing application programs 904 or data 905. Among them, the memory 902 and the storage medium 903 may be short-term storage or persistent storage. The program stored in the storage medium 903 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the information processing device. 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 UE 900.

UE900 may also include one or more wired or wireless network interfaces 907, one or more input and output interfaces 908, and/or one or more operating systems 906, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. .

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

The foregoing describes a method of user plane data transmission in the present disclosure, and the following describes the network side device that performs the foregoing user plane data transmission.

Referring to FIG. 10, a network-side device for user plane data transmission in an embodiment of the present disclosure includes: at least one processor 1001, 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 provided by an embodiment of the present disclosure. The network-side device 1000 may have relatively large differences due to different configurations or performances, and may include one or more processors (English full name : Central processing units, English abbreviation: CPU) 1001 (for example, one or more processors) and memory 1002, one or more storage media 1003 for storing application programs 1004 or data 1005 (for example, one or one storage device with a large amount of data) . Among them, the memory 1002 and the storage medium 1003 may be short-term storage or permanent storage. The program stored in the storage medium 1003 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the information processing device. Furthermore, 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 and output interfaces 1008, and/or one or more operating systems 1006, such as Windows Server, Mac OS X, Unix, Linux , FreeBSD, etc.

Restore the stored access stratum context related information of the UE;

Rebuild the RLC entities of all DRBs interacting with the UE;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

The above describes a network-side device and UE for user plane data transmission in the embodiment of the present disclosure from the perspective of hardware processing. The following describes the UE and network for user plane data transmission in the embodiment of the present disclosure from the perspective of a modular functional entity. Side device description.

Please refer to FIG. 11, a UE for user plane data transmission provided by an embodiment of the present disclosure, and the UE includes:

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

The first transmission unit 1102 is configured to transmit the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.

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

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

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

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

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

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.

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

Optionally, the first transmission unit is configured to perform at least one of the following steps after determining the state of returning to the inactive state and not transmitting and receiving data:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

Please refer to FIG. 12 A network-side device for user plane data transmission provided by an embodiment of the present disclosure, the network-side device includes:

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

The second transmission unit 1202 is configured to receive user plane data transmitted by the UE according to configuration information, where the user plane data transmitted by the UE is not accompanied by 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, including performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Rebuild the RLC entities of all DRBs interacting with the UE;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

Restore 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 configuration information, and is specifically configured to:

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

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

Optionally, after the second transmission unit is used to instruct the UE to return to the inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.

The embodiments of the present disclosure also provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the user plane data transmission method provided in the foregoing embodiments.

The embodiments of the present disclosure also provide a computer program product, including a computer program, the computer program including program instructions, when the program instructions are executed by an electronic device, the electronic device is caused to perform the user plane data transmission provided in the above-mentioned embodiment Methods.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the device and module described above can be referred to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other divisions in actual implementation, for example, multiple modules or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional modules in the various embodiments of the present disclosure 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 above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can 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 by software, it can be implemented in the form of a computer program product in whole or in part.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present disclosure are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as 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 or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

The technical solutions provided by the present disclosure are described in detail above. Specific examples are used in this disclosure to illustrate the principles and implementations of the present disclosure. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present disclosure. At the same time, for those of ordinary skill in the art, based on the ideas of the present disclosure, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as limiting the present disclosure.

Claims

A user plane data transmission method, applied to user equipment UE, characterized in that it includes:

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

The user plane data is transmitted 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 method according to claim 1, wherein triggering the transmission of user plane data to the network side comprises:

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 instruction information of the higher layer; 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 media access control MAC layer.
The method according to claim 1 or 2, wherein triggering the transmission of user plane data to the network side comprises:

Determine whether the current camping cell is the last cell that the UE accesses before entering the inactive state, and if it is triggered to transmit user plane data to the network side;

Otherwise, it triggers the execution of the RRC recovery process to request to enter the connected state.
The method according to claim 1, wherein performing corresponding transmission configuration on at least one layer to enter the sending data state and/or the receiving data state includes performing at least one of the following steps:

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

Restore the stored access layer context-related information in the inactive state;

Rebuild all data radio bearer PDCP entities of the DRB Packet Data Convergence Protocol or perform all the PDCP data recovery procedures of AM and DRB in the confirmation mode;

Rebuild the PDCP entity of the DRB used to transmit the data to be transmitted or perform the PDCP data recovery process;

Rebuild all DRB radio link layer control RLC entities;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

Resume the suspended DRB or resume the suspended DRB used to transmit the data to be transmitted;

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;

The default configuration of MAC specified in the application protocol;

Application of the common control channel CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored robustness header compression RoHC state;

Restore the stored QoS flow and DRB mapping rules;

Recover stored security keys and/or security algorithms;

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

The RRC layer instructs the bottom layer to transmit the data to be transmitted.
The method according to claim 1 or 4, wherein the transmitting the user plane data to the network side according to the configuration information comprises:

Transmit the user plane data to the network side through the uplink resource pre-configured for the terminal on the network side; or

Through dedicated random access resources, the user plane data is transmitted to the network side in message A MSGA or message 3 MSG3.
The method according to claim 1, wherein after transmitting the user plane data to the network side according to the configuration information, the method further comprises:

Monitor the preset physical downlink control channel PDCCH scrambled with the preset radio network temporary identifier RNTI allocated for the UE.
The method according to claim 1, wherein the transmitting the user plane data to the network side according to the configuration information comprises:

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

When sending the last data packet to be transmitted, send indication information to the network side through the MAC layer or the physical layer to indicate that the data packet is the last data packet or there is no data to be transmitted; or

Send indication information to the network side via MAC or physical layer to indicate that there is no data to be transmitted; or

Send indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception.
The method according to claim 1, wherein after transmitting the user plane data to the network side according to the configuration information, the method further comprises:

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data; or

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data according to the instructions from the upper layer; or

The RRC layer determines whether to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information of the MAC layer.
The method according to claim 1, wherein after transmitting the user plane data to the network side according to the configuration information, the method further comprises:

The receiving network side instructs the UE to fall back to the inactive state and no longer perform data transmission and reception through an RRC message, a MAC message, or a physical layer message.
The method according to claim 1, wherein after transmitting the user plane data to the network side according to the configuration information, the method further comprises:

The updated pre-configured dedicated resource indicated by the network side through the RRC message or the MAC message or the physical layer message is received.
The method according to claim 9 or 10, wherein after it is determined that the state of returning to the inactive state and not sending and receiving data is determined, at least one of the following steps is performed:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A user plane data transmission method, applied to a network side device, characterized in that it includes:

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

Receiving 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.
The method according to claim 13, wherein performing communication configuration with the UE so that the UE performs corresponding transmission configuration in at least one layer comprises performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Reestablishing PDCP entities of all DRBs interacting with the UE or performing PDCP data recovery procedures of all AM DRBs;

Reestablishing a PDCP entity interacting with the UE and used for transmitting the data to be transmitted DRB or performing a PDCP data recovery process;

Rebuild the RLC entities of all DRBs interacting with the UE;

Rebuild the RLC entity interacting with the UE and used to transmit the DRB to be transmitted;

Resume the suspended DRB interacting with the UE or resume the suspended DRB used to transmit data to be transmitted;

The default configuration specified in the SRB1 and/or SRB2 application protocol that interacts with the UE;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

Configure the bottom layer of the UE to use integrity protection and encryption.
The method according to claim 13, wherein receiving user plane data transmitted by the UE according to configuration information comprises:

Receiving the user plane data transmitted by the UE through the uplink resource pre-configured for the camping cell on the network side; or

Receive user plane data transmitted by the UE in MSGA or MSG3 through dedicated random access resources.
The method according to claim 13, wherein receiving user plane data transmitted by the UE according to configuration information comprises:

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

Receive the indication information sent to the network side through the MAC layer or the physical layer when the UE sends the last data packet to be transmitted, the indication information is used to indicate that the data packet is the last data packet or there is no data to be transmitted ;or

Receiving indication information sent by the UE to the network side through the MAC or physical layer, where the indication information is used to indicate that there is no data to be transmitted; or

Receiving indication information sent by the UE to the network side through the MAC layer or the physical layer, where the indication information is used to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception.
The method according to claim 13, wherein receiving user plane data transmitted by the UE according to configuration information further comprises:

The RRC message, MAC message, or physical layer message instructs the UE to fall back to the inactive state and no longer perform data transmission and reception.
The method according to claim 13, wherein receiving user plane data transmitted by the UE according to configuration information further comprises:

Indicate the updated pre-configured dedicated resources to the UE through an RRC message, a MAC message, or a physical layer message.
The method according to claim 18, wherein after instructing the UE to return to the inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

Reestablishing the RLC entity of SRB1 that interacts with the UE and/or reestablishing the RLC entity of SRB2;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A UE for user plane data transmission, which is characterized by comprising: a memory and a processor, and a computer program is stored in the memory;

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

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

The user plane data is transmitted to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.
The UE according to claim 21, wherein the processor is configured to trigger the transmission of user plane data to the network side, and is specifically configured to:

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 instruction information of the higher layer; or

The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the instruction information of the MAC layer.
The UE according to claim 21 or 22, wherein the processor is configured to trigger the transmission of user plane data to the network side, and is specifically configured to:

Determine whether the current camping cell is the last cell that the UE accesses before entering the inactive state, and if it is triggered to transmit user plane data to the network side;

Otherwise, it triggers the execution of the RRC recovery process to request to enter the connected state.
The UE according to claim 21, wherein the processor is configured to perform corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state, comprising performing at least one of the following steps:

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

Restore the stored access layer context-related information in the inactive state;

Rebuild the PDCP entities of all DRBs or perform the data recovery process of PDCP of all AM DRBs;

Rebuild the PDCP entity of the DRB used to transmit the data to be transmitted or perform the PDCP data recovery process;

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

Resume the suspended DRB or resume the suspended DRB used to transmit the data to be transmitted;

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

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

The RRC layer instructs the bottom layer to transmit the data to be transmitted.
The UE according to claim 21 or 24, wherein the processor is configured to transmit the user plane data to the network side according to configuration information, and is specifically configured to:

Transmit the user plane data to the network side through the uplink resource pre-configured for the terminal on the network side; or

The user plane data is transmitted to the network side in MSGA or MSG3 through dedicated random access resources.
The UE according to claim 21, wherein after the processor is configured to transmit the user plane data to the network side according to the configuration information, it is further configured to:

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.
The UE according to claim 21, wherein the processor is configured to transmit the user plane data to the network side according to configuration information, and is specifically configured to:

When it is determined that there is no more user plane data to be transmitted, the instruction information is sent to the network side.
The UE according to claim 27, wherein the processor is configured to send indication information to the network side when determining that there is no more user plane data to be transmitted, which is specifically used for:

When sending the last data packet to be transmitted, send indication information to the network side through the MAC layer or the physical layer to indicate that the data packet is the last data packet or there is no data to be transmitted; or

Send indication information to the network side via MAC or physical layer to indicate that there is no data to be transmitted; or

Send indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception.
The UE according to claim 21, wherein after the processor is configured to transmit the user plane data to the network side according to the configuration information, it is further configured to:

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data; or

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data according to the instructions from the upper layer; or

The RRC layer determines whether to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information of the MAC layer.
The UE according to claim 21, wherein after the processor is configured to transmit the user plane data to the network side according to the configuration information, it is further configured to:

The receiving network side instructs the UE to fall back to the inactive state and no longer perform data transmission and reception through an RRC message, a MAC message, or a physical layer message.
The UE according to claim 21, wherein after the processor is configured to transmit the user plane data to the network side according to the configuration information, it is further configured to:

The updated pre-configured dedicated resource indicated by the network side through the RRC message or the MAC message or the physical layer message is received.
The UE according to claim 29 or 30, wherein the processor is configured to perform at least one of the following steps after determining that the processor returns to the inactive state and does not send and receive data:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A network-side device for user plane data transmission, characterized by comprising: a memory and a processor, and a computer program is stored in the memory;

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

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

Receiving 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.
The network-side device according to claim 33, wherein the processor is configured to perform communication configuration with the UE, so that the UE performs corresponding transmission configuration in at least one layer, comprising performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Reestablishing PDCP entities of all DRBs interacting with the UE or performing PDCP data recovery procedures of all AM DRBs;

Reestablishing a PDCP entity interacting with the UE and used for transmitting the data to be transmitted DRB or performing a PDCP data recovery process;

Rebuild the RLC entities of all DRBs interacting with the UE;

Rebuild the RLC entity interacting with the UE and used to transmit the DRB to be transmitted;

Resume the suspended DRB interacting with the UE or resume the suspended DRB used to transmit data to be transmitted;

The default configuration specified in the SRB1 and/or SRB2 application protocol that interacts with the UE;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

Configure the bottom layer of the UE to use integrity protection and encryption.
The network side device according to claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and is specifically configured to:

Receiving the user plane data transmitted by the UE through the uplink resource pre-configured for the camping cell on the network side; or

Receive user plane data transmitted by the UE in MSGA or MSG3 through dedicated random access resources.
The network side device according to claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and is specifically configured to:

Receiving the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted.
The network side device according to claim 36, wherein 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 is specifically used for:

Receive the indication information sent to the network side through the MAC layer or the physical layer when the UE sends the last data packet to be transmitted, the indication information is used to indicate that the data packet is the last data packet or there is no data to be transmitted ;or

Receiving indication information sent by the UE to the network side through the MAC or physical layer, where the indication information is used to indicate that there is no data to be transmitted; or

Receiving indication information sent by the UE to the network side through the MAC layer or the physical layer, where the indication information is used to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception.
The network side device according to claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and is further configured to:

The RRC message, MAC message, or physical layer message instructs the UE to fall back to the inactive state and no longer perform data transmission and reception.
The network side device according to claim 33, wherein the processor is configured to receive user plane data transmitted by the UE according to configuration information, and is further configured to:

Indicate the updated pre-configured dedicated resources to the UE through an RRC message, a MAC message, or a physical layer message.
The network side device according to claim 38, wherein the processor is configured to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

Reestablishing the RLC entity of SRB1 that interacts with the UE and/or reestablishing the RLC entity of SRB2;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A UE for user plane data transmission, characterized in that the UE includes:

The first configuration unit is used to trigger the corresponding transmission configuration on at least one layer to enter the data sending state and/or the data receiving state when the user plane data is transmitted to the network side, and the UE is an inactive state UE;

The first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, wherein the transmission of the user plane data is not accompanied by RRC signaling.
The UE according to claim 41, wherein the first configuration unit is used to trigger the transmission of user plane data to the network side, and is specifically used to:

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 instruction information of the higher layer; or

The RRC layer determines whether to trigger the transmission of user plane data to the network side according to the instruction information of the MAC layer.
The UE according to claim 41 or 42, wherein the first configuration unit is used to trigger the transmission of user plane data to the network side, and is specifically used to:

Determine whether the current camping cell is the last cell that the UE accesses before entering the inactive state, and if it is triggered to transmit user plane data to the network side;

Otherwise, it triggers the execution of the RRC recovery process to request to enter the connected state.
The UE according to claim 41, wherein the first configuration unit is configured to perform corresponding transmission configuration in at least one layer to enter the data sending state and/or the data receiving state, and comprises performing at least one of the following steps:

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

Restore the stored access layer context-related information in the inactive state;

Rebuild the PDCP entities of all DRBs or perform the data recovery process of PDCP of all AM DRBs;

Rebuild the PDCP entity of the DRB used to transmit the data to be transmitted or perform the PDCP data recovery process;

Rebuild all RLC entities of DRB;

Rebuild the RLC entity used to transmit the DRB of the data to be transmitted;

Resume the suspended DRB or resume the suspended DRB used to transmit the data to be transmitted;

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

The default configuration of MAC specified in the application protocol;

Apply the CCCH configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the stored RRC configuration;

Restore the stored RoHC state;

Restore the mapping rules between stored QoS flows and DRB;

Recover stored security keys and/or security algorithms;

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

The RRC layer instructs the bottom layer to transmit the data to be transmitted.
The UE according to claim 41 or 44, wherein the first transmission unit is configured to transmit the user plane data to the network side according to configuration information, and is specifically configured to:

Transmit the user plane data to the network side through the uplink resource pre-configured for the terminal on the network side; or

The user plane data is transmitted to the network side in MSGA or MSG3 through dedicated random access resources.
The UE according to claim 41, wherein the first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, and is further configured to:

Monitor the preset PDCCH scrambled with the preset RNTI allocated for the UE.
The UE according to claim 41, wherein the first transmission unit is configured to transmit the user plane data to the network side according to configuration information, and is specifically configured to:

When it is determined that there is no more user plane data to be transmitted, the instruction information is sent to the network side.
The UE according to claim 47, wherein the first transmission unit is configured to send indication information to the network side when determining that there is no more user plane data to be transmitted, which is specifically used for:

When sending the last data packet to be transmitted, send indication information to the network side through the MAC layer or the physical layer to indicate that the data packet is the last data packet or there is no data to be transmitted; or

Send indication information to the network side via MAC or physical layer to indicate that there is no data to be transmitted; or

Send indication information to the network side through the MAC layer or the physical layer to instruct the UE to fall back to the inactive state and no longer perform data transmission and reception.
The UE according to claim 41, wherein the first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, and is further configured to:

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data; or

The RRC layer determines whether to fall back to the inactive state and no longer send and receive data according to the instructions from the upper layer; or

The RRC layer determines whether to fall back to the inactive state and no longer perform data transmission and reception according to the instruction information of the MAC layer.
The UE according to claim 41, wherein the first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, and is further configured to:

The receiving network side instructs the UE to fall back to the inactive state and no longer perform data transmission and reception through an RRC message, a MAC message, or a physical layer message.
The UE according to claim 41, wherein the first transmission unit is configured to transmit the user plane data to the network side according to the configuration information, and is further configured to:

The updated pre-configured dedicated resource indicated by the network side through the RRC message or the MAC message or the physical layer message is received.
The UE according to claim 49 or 50, wherein the first transmission unit is configured to perform at least one of the following steps after determining to fall back to the inactive state and not send and receive data:

Reset the MAC layer configuration;

Release the default configuration of MAC in the protocol;

Rebuild the RLC entity of SRB1 and/or rebuild the RLC entity of SRB2;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A network-side device for user plane data transmission, characterized in that the network-side device includes:

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

The second transmission unit is configured to receive the user plane data transmitted by the UE according to the configuration information, wherein the transmission of the user plane data by the UE is not accompanied by RRC signaling.
The network side device according to claim 53, wherein 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, including performing at least one of the following steps:

Restore the stored access stratum context related information of the UE;

Reestablishing PDCP entities of all DRBs interacting with the UE or performing PDCP data recovery procedures of all AM DRBs;

Reestablishing a PDCP entity interacting with the UE and used for transmitting the data to be transmitted DRB or performing a PDCP data recovery process;

Rebuild the RLC entities of all DRBs interacting with the UE;

Rebuild the RLC entity interacting with the UE and used to transmit the DRB to be transmitted;

Resume the suspended DRB interacting with the UE or resume the suspended DRB used to transmit data to be transmitted;

The default configuration specified in the SRB1 and/or SRB2 application protocol that interacts with the UE;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

Recover SRB1 and/or SRB2 interacting with the UE;

Restore the stored RRC configuration of the UE;

Restore the stored RoHC state of the UE;

Restore the stored mapping rule between the QoS flow of the UE and the DRB;

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

Configure the bottom layer of the UE to use integrity protection and encryption.
The network side device according to claim 53, wherein the second transmission unit is configured to receive user plane data transmitted by the UE according to configuration information, and is specifically configured to:

Receiving the user plane data transmitted by the UE through the uplink resource pre-configured for the camping cell on the network side; or

Receive user plane data transmitted by the UE in MSGA or MSG3 through dedicated random access resources.
The network side device according to claim 53, wherein the second transmission unit is configured to receive user plane data transmitted by the UE according to configuration information, and is specifically configured to:

Receiving the corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted.
The network side device according to claim 56, wherein the second transmission unit is configured to receive corresponding indication information sent when the UE determines that there is no more user plane data to be transmitted, and is specifically used for:

Receive the indication information sent to the network side through the MAC layer or the physical layer when the UE sends the last data packet to be transmitted, the indication information is used to indicate that the data packet is the last data packet or there is no data to be transmitted ;or

Receiving indication information sent by the UE to the network side through the MAC or physical layer, where the indication information is used to indicate that there is no data to be transmitted; or

Receiving indication information sent by the UE to the network side through the MAC layer or the physical layer, where the indication information is used to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception.
The network-side device according to claim 53, wherein the second transmission unit is used to receive user plane data transmitted by the UE according to configuration information, and is also used to:

The RRC message, MAC message, or physical layer message instructs the UE to fall back to the inactive state and no longer perform data transmission and reception.
The network side device according to claim 53, wherein the second transmission unit is configured to receive user plane data transmitted by the UE according to configuration information, and is further configured to:

Indicate the updated pre-configured dedicated resources to the UE through an RRC message, a MAC message, or a physical layer message.
The network side device according to claim 58, wherein the second transmission unit is used to instruct the UE to fall back to an inactive state and no longer perform data transmission and reception, perform at least one of the following steps:

Reestablishing the RLC entity of SRB1 that interacts with the UE and/or reestablishing the RLC entity of SRB2;

Reestablishing the PDCP entity of SRB1 that interacts with the UE and/or reestablishing the PDCP entity of SRB2;

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

Save the secret key;

Save ROHC status;

Save the mapping relationship between Qos flow and DRB;

Save the context of the UE.
A computer-readable storage medium, characterized by comprising computer program instructions, which when run on a computer, cause the computer to execute the method according to any one of claims 1 to 13, or execute the method according to claim 14 to The method of any one of 20.