CN116058023A

CN116058023A - Data transmission method, device, communication equipment and storage medium

Info

Publication number: CN116058023A
Application number: CN202080103717.2A
Authority: CN
Inventors: 林雪; 石聪; 王淑坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2023-05-02
Also published as: WO2022082618A1

Abstract

The application discloses a data transmission method, a data transmission device, communication equipment and a storage medium, and relates to the field of wireless communication. The method is applied to the terminal equipment, wherein the terminal equipment is in an inactive state, and the method comprises the following steps: after the first uplink small data transmission is successfully transmitted, a first radio resource control release message is received; and executing subsequent inactive state data transmission according to the first radio resource control release message. In the method, the terminal equipment in the inactive state can perform multiple times of inactive state data transmission in the process of one small data transmission under the condition that RRC connection is not required to be recovered, so that power consumption is reduced.

Description

Data transmission method, device, communication equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a data transmission method, apparatus, communication device, and storage medium.

Background

The rrc_inactive state (i.e., INACTIVE state) is a New state that a New Radio (NR) system introduces from a power saving perspective.

For terminal devices in the inactive state, radio bearers and all radio resources are released, but the terminal device side and the network device side reserve the UE access context in order to quickly resume the radio resource control (Radio Resource Control, RRC) connection.

In the related art, in the inactive state, if the terminal device wants to perform data transmission, it needs to trigger a connection establishment recovery procedure to recover the RRC connection, and enter the connected state to perform data transmission, which has a large power consumption.

Disclosure of Invention

The embodiment of the application provides a data transmission method, a device, communication equipment and a storage medium, wherein the terminal equipment in an inactive state can perform multiple times of inactive state data transmission in the process of one small data transmission under the condition of not recovering RRC connection, so that the power consumption is reduced. The technical scheme is as follows:

according to one aspect of the present application, there is provided a data transmission method applied to a terminal device, where the terminal device is in an inactive state, the method including:

after successful transmission of the first uplink small data transmission, receiving a first radio resource control release message;

and executing subsequent inactive state data transmission according to the first radio resource control release message.

According to one aspect of the present application, there is provided a data transmission method applied to a network device, the method including:

after the first uplink small data transmission is successfully received, a first radio resource control release message is sent to the terminal equipment;

The terminal equipment is in an inactive state, and the first radio resource control release message is used for indicating the terminal equipment to execute subsequent inactive state data transmission.

According to an aspect of the present application, there is provided a data transmission apparatus applied to a terminal device, where the terminal device is in an inactive state, the apparatus comprising: a transmission module;

the transmission module is used for receiving a first radio resource control release message after successful transmission of the first uplink small data transmission;

and the transmission module is used for executing subsequent inactive state data transmission according to the first radio resource control release message.

According to an aspect of the present application, there is provided a data transmission apparatus for use in a network device, the apparatus comprising: a transmission module;

the transmission module is used for sending a first radio resource control release message to the terminal equipment after successfully receiving the first uplink small data transmission;

According to an aspect of the present application, there is provided a terminal device comprising: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the data transmission method as described in the above aspect.

According to one aspect of the present application, there is provided a network device comprising: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the data transmission method as described in the above aspect.

According to one aspect of the present application, there is provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the data transmission method as described in the above aspect.

According to an aspect of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium, the computer instructions being read from the computer readable storage medium by a processor of a computer device, the computer instructions being executed by the processor such that the computer device performs the data transmission method of the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

After the first uplink small data transmission is completed, the terminal equipment in the inactive state can perform subsequent inactive state data transmission according to the configuration of the first radio resource control release message sent by the network equipment, so that multiple times of inactive state data transmission are performed in the process of one small data transmission flow without recovering RRC connection, and the power consumption of the terminal equipment is reduced.

Drawings

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

FIG. 1 is a block diagram of a communication system provided in an exemplary embodiment of the present application;

FIG. 2 is a flow chart of a data transmission method provided in an exemplary embodiment of the present application;

FIG. 3 is a flow chart of a data transmission method provided in an exemplary embodiment of the present application;

FIG. 4 is a flow chart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 5 is a flow chart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 6 is a flow chart of a data transmission method provided by an exemplary embodiment of the present application;

fig. 7 is a block diagram of a data transmission apparatus according to an exemplary embodiment of the present application;

fig. 8 is a block diagram of a data transmission apparatus according to an exemplary embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

First, the terms involved in the embodiments of the present application will be briefly described:

RRC state:

in NR, a new RRC state, namely rrc_inactive state, is defined for the purpose of reducing air interface signaling and quickly recovering wireless connection and quickly recovering data traffic.

Rrc_inactive state (i.e., INACTIVE state): mobility is cell selection reselection based on terminal equipment, there is a connection between Core Network (CN) and NR, UE access context exists on a certain Network equipment, paging is triggered by radio access Network (Radio Access Network, RAN), paging area based on RAN is managed by RAN, network equipment side knows that location of terminal equipment is based on paging area level of RAN.

Small data transfer (Small Data Transmission, SDT):

SDT is a data transmission mode configured for a terminal device in an inactive state. Through SDT, the terminal equipment can complete the transmission of service data without entering a connection state, thereby reducing the power consumption and the cost of the terminal equipment.

The SDT may be an uplink small data transmission based on a random access procedure (2 steps/4 steps), or an uplink small data transmission based on a preconfigured resource (such as CG type 1).

RAN2#111e-meeting developed a discussion of the problem of SDT, and the conclusions reached by the meeting discussion included:

supporting uplink transmission or downlink transmission after uplink SDT, and the terminal equipment does not need to be converted into a connection state; when the terminal device is in an inactive state, multiple uplink and downlink data may be transmitted as part of the same SDT procedure without switching to a connected state on a dedicated grant.

The following schemes are provided in the embodiments of the present application for how to perform uplink transmission or downlink transmission after uplink SDT.

Fig. 1 shows a block diagram of a communication system provided in an exemplary embodiment of the present application, which may include: access network 12 and terminal equipment 14.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminals. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in LTE systems, called enodebs or enbs; in a 5G NR-U system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience in the embodiments of the present application, the above-mentioned devices for providing the terminal device 14 with the wireless communication function are collectively referred to as a network device.

The terminal device 14 may include various handheld devices, vehicle mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminals (terminal devices), etc. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. The network device 120 and the terminal device 14 communicate with each other via some air interface technology, e.g. Uu interface. Optionally, the terminal device is in an rrc_inactive state.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, evolution system of NR system, LTE (LTE-based access to Unlicensed spectrum, LTE-U) system on unlicensed frequency band, NR-U system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication system or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, as the communication technology advances, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, and internet of vehicles (Vehicle to Everything, V2X) systems, etc. The embodiments of the present application may also be applied to these communication systems.

Fig. 2 shows a flowchart of a data transmission method according to an exemplary embodiment of the present application. The method can be applied to a communication system as shown in fig. 1, in which a terminal device is in an inactive state, and the method includes:

step 210, after successfully receiving the first uplink small data transmission, the network device sends a first radio resource control release message to the terminal device.

The small data transmission is a data transmission mode configured for the terminal equipment in the inactive state. The small data transfer does not require an RRC connection to be established between the terminal device and the network device. For terminal equipment with small data volume and low transmission frequency, if the data transmission is performed after the RRC connection with the network equipment is restored only through the connection establishment restoration process, the terminal equipment needs to return to an inactive state after the data transmission is completed, and the power consumption of the terminal equipment is large. By performing the inactive state small data transmission, the terminal device can avoid performing the connection state transition, thereby reducing the power consumption of the terminal device.

In the process that the first uplink small data transmission is a small data transmission flow, the uplink transmission initiated by the terminal equipment for the first time can be used for transmitting uplink data or signaling. After the first uplink small data transmission, the subsequent inactive state data transmission is supported in the same small data transmission flow.

The first radio resource control release message (first RRCRelease message) is a message for configuring inactive state data transmission in the small data transmission process.

By receiving the first uplink small data transmission, the network device can learn that the terminal device triggers the inactive state data transmission, and then the network device sends a first radio resource control release message to the terminal device to configure the subsequent inactive state data transmission.

Step 220, the terminal device receives the first radio resource control release message.

After the first uplink small data transmission is successfully transmitted, the terminal equipment receives a first radio resource control release message sent by the network equipment.

In step 230, the terminal device performs subsequent inactive state data transmission according to the first rrc release message.

Subsequent inactive state data transmission refers to: the terminal device supports at least one uplink transmission or downlink transmission, that is, at least one uplink data transmission or downlink data reception, in the same SDT procedure in an inactive state.

After receiving the first radio resource control release message, the terminal device executes subsequent inactive state data transmission according to the configuration in the first radio resource control release message.

It can be understood that the first RRC release message is not used to adjust the RRC state of the terminal device, the terminal device is in an inactive state before receiving the first RRC release message, and the terminal device is still in an inactive state after receiving the first RRC release message, and performs data transmission in the inactive state.

In summary, according to the method provided in the embodiment, after the first uplink small data transmission is completed, the terminal device in the inactive state may perform subsequent inactive state data transmission according to the configuration of the first radio resource control release message sent by the network device, so that multiple inactive state data transmissions are performed in the process of one small data transmission procedure without recovering the RRC connection, and power consumption of the terminal device is reduced.

In an alternative embodiment based on fig. 2, the content in the first radio resource control release message may be in the following two cases.

1) The first radio resource control release message includes: timer configuration information; the timer configuration information is used to configure the timer.

The first radio resource control release message configures a timer, and the terminal device performs subsequent inactive state data transmission based on the timer.

2) The first radio resource control release message includes: pre-configuring uplink resources or pre-configuring downlink resources.

The preconfigured uplink resource refers to a time-frequency domain resource used by the network equipment for preconfigured uplink transmission of the terminal equipment, and the preconfigured downlink resource refers to a time-frequency domain resource used by the network equipment for preconfigured downlink reception of the terminal equipment.

The first radio resource control release message pre-configures uplink resources or downlink resources, and the terminal device performs subsequent inactive state data transmission based on the pre-configured resources.

Next, exemplary descriptions are made on the data transmission methods corresponding to the two types of the first radio resource control release messages, respectively.

In an alternative embodiment based on fig. 2, fig. 3 shows a flow chart of a data transmission method provided by an exemplary implementation of the present application. The method can be applied in a communication system as shown in fig. 1, in which the terminal device is in an inactive state. In the present embodiment, step 230 is alternatively implemented as step 2311 and step 2312.

Optionally, the first uplink small data transmission includes: a radio resource control resume request message (rrcresumerequest message). That is, before step 210, the terminal device may send a radio resource control resume request message to the network device for informing the network device that it supports the inactive state data transmission and requesting to obtain the relevant configuration of the inactive state data transmission. Optionally, the network device sends a first radio resource control release message to the terminal device based on the information in the radio resource control recovery request message.

Optionally, the radio resource control recovery request message is multiplexed with the uplink data. Namely: the radio resource control recovery request message and the uplink data are transmitted in the same Transport Block (TB) using the same time-frequency domain resource.

Optionally, the small data transmission types corresponding to the first uplink small data transmission include: small data transmission based on Configured Grant (CG); or, small data transmission based on a random access channel (Random Access Channel, RACH). Optionally, in case that the condition for triggering the small data transmission is met, the terminal device may select one of the small data transmission types and execute the first uplink small data transmission.

Wherein, the small data transmission based on RACH can be the small data transmission based on 2 steps RACH, the first small data transmission is sent in message A (MSGA); or small data transmission based on 4-step RACH, the first uplink small data transmission is sent in message 3 (MSG 3).

Optionally, the first radio resource control release message multiplexes the downlink data. Namely: the first radio resource control release message and the downlink data are transmitted in the same TB using the same time-frequency domain resource.

In step 2311, the terminal device starts a timer according to the timer configuration information in the first rrc release message.

Optionally, when receiving the timer configuration information, the terminal device starts to start a timer; or the timer configuration information comprises the starting time of the timer, and the terminal equipment starts the timer at the time domain position corresponding to the configured starting time.

In step 2312, the terminal device performs subsequent inactive state data transmission according to the scheduling of the network device in the running time of the timer, where the inactive state data transmission includes: at least one of uplink data transmission and downlink data reception.

The timer configuration information may include a running time of the timer. The terminal device starts to count when starting the timer, and the count is used as the starting point of the running time of the timer. During the running time of the timer, the terminal device may perform subsequent inactive state data transmission according to the scheduling of the network device. Wherein, the subsequent inactive state data transmission may refer to: at least one uplink data transmission; or at least one time of downlink data reception; or at least one uplink data transmission and at least one downlink data reception.

Optionally, the scheduling of the network device is a dynamic resource scheduling. For uplink data transmission, the dynamic resource scheduling refers to that the network device sends an uplink grant (UL grant) to the terminal device, where the UL grant includes time-frequency domain resources occupied by the scheduled uplink data. The terminal device transmits uplink data on the indicated time-frequency domain resource according to the indication of the UL grant.

Alternatively, the scheduling is scrambled with a cell radio network temporary identifier (C-RNTI). In the embodiment of the application, the C-RNTI is an identity for identifying scheduling for a specific terminal device. The network equipment allocates different C-RNTI values to different terminal equipment. The network device uses the C-RNTI to scramble the schedule, and the terminal device monitors the uplink transmission or the downlink reception scheduled by a physical downlink control channel (Physical Downlink Control Channel, PDCCH) scrambled by the C-RNTI.

Optionally, after step 2312, the method further includes: after the timer times out, the terminal equipment ends the inactive state data transmission.

The timer configuration information may include a running time of the timer. After the timer is started, the time period exceeding the running time of the timer can be regarded as the time period of the timer overtime. After the timer is overtime, the terminal equipment ends the current SDT flow, and does not perform inactive state data transmission, namely: in turn, conventional (legacy) inactive state behavior is performed.

Optionally, the data corresponding to the inactive state data transmission is processed by a security key, where the security key includes: at least one of an encryption key and an integrity protection key; wherein the security key is derived from a next hop count value (Next hop Chaining Count, NCC) contained in a second radio resource control release message (second RRCRelease message) received by the terminal device, the second radio resource control release message being used to release the terminal device from the connected state to the inactive state. It is understood that the second radio resource control release message is a different message from the first radio resource control release message.

That is, before step 210, the network device transmits a second radio resource control release message, and the terminal device correspondingly receives the second radio resource control release message, thereby converting the RRC state from the connected state to the inactive state. The second radio resource control release message may include an NCC, where the NCC is configured to derive a security key, and the security key includes: at least one of an encryption key and an integrity protection key.

The encryption key is used for encrypting the data corresponding to the inactive state data transmission, and the integrity protection key is used for integrity protection of the data corresponding to the inactive state data transmission.

In summary, in the method provided in this embodiment, the first RRC release message may include timer configuration information, so that the terminal device performs subsequent inactive state data transmission based on the timer according to dynamic scheduling of the network device, so that RRC state conversion is not required, and power consumption is reduced.

Meanwhile, in the method provided in this embodiment, the radio resource control release message (i.e., the second radio resource control release message) that is received last by the terminal device may include an NCC, where the NCC is used to derive a security key, and the security key may ensure security of inactive state data transmission.

Referring to fig. 4 in combination, fig. 4 shows a flowchart of a data transmission method according to an exemplary embodiment of the present application, including the following steps:

step 41, the terminal device sends a radio resource control recovery request message and uplink data to the network device.

The radio resource control recovery request message is multiplexed with the uplink data and included in the first uplink small data transmission.

In step 42, the network device sends a first radio resource control release message to the terminal device.

The first rrc release message includes timer configuration information. And the terminal equipment starts a timer configured in the timer configuration information when receiving the first radio resource control release message.

Step 43, the network device sends an uplink grant to the terminal device.

The uplink grant may include a time-frequency domain resource occupied by the scheduled uplink data.

And step 44, the terminal device sends the uplink data to the network device.

The terminal device sends uplink data on the indicated time-frequency domain resource according to the indication of the uplink authorization sent by the network device.

Step 45, the network device sends downlink data to the terminal device.

It will be appreciated that the terminal device may perform the inactive state data transmission with the network device before the timer expires, i.e. during the running time of the timer.

In an alternative embodiment based on fig. 2, fig. 5 shows a flow chart of a data transmission method provided by an exemplary implementation of the present application. The method can be applied in a communication system as shown in fig. 1, in which the terminal device is in an inactive state. In this embodiment, step 230 is alternatively implemented as step 232.

Optionally, the radio resource control recovery request message is multiplexed with the uplink data. Namely: the radio resource control recovery request message and the uplink data are transmitted in the same TB using the same time-frequency domain resource.

Optionally, the small data transmission types corresponding to the first uplink small data transmission include: CG-based small data transfer; or, RACH based small data transmission. Optionally, in case that the condition for triggering the small data transmission is met, the terminal device may select one of the small data transmission types and execute the first uplink small data transmission.

Step 232, the terminal device performs subsequent inactive state data transmission according to the first radio resource control release message, where the inactive state data transmission includes: at least one of uplink data transmission performed on the pre-configured uplink resources and downlink data reception performed on the pre-configured downlink resources.

Under the condition that the first radio resource control release message only comprises the pre-configured uplink resource, the terminal equipment executes subsequent uplink data transmission on the pre-configured uplink resource, namely: and the terminal equipment performs at least one uplink transmission on the preconfigured uplink resource.

Under the condition that the first radio resource control release message only comprises the pre-configured downlink resource, the terminal equipment executes subsequent downlink data receiving on the pre-configured downlink resource, namely: and the terminal equipment performs at least one downlink reception on the pre-configured downlink resource.

In the case that the first radio resource control release message includes the preconfigured uplink resource and the preconfigured downlink resource, the terminal device performs uplink data transmission on the preconfigured uplink resource and/or performs downlink data reception on the preconfigured downlink resource, that is: the terminal device performs at least one uplink transmission and/or at least one downlink reception.

Optionally, for uplink data transmission, the terminal device monitors downlink feedback scheduled by the network device. Wherein the scheduling is scrambled by the C-RNTI; or, the schedule is scrambled by a pre-configured uplink resource radio network temporary identifier (Preconfigured Uplink Resource RadioNetworkTemporaryIdentifier, PUR-RNTI), which is a radio network temporary identifier bound to the pre-configured uplink resource. Wherein the PUR-RNTI may be included in the first radio resource control release message.

Optionally, the data corresponding to the inactive state data transmission is processed by a security key, where the security key includes: at least one of an encryption key and an integrity protection key; the security key is derived from a next hop count value NCC, where NCC is included in a second radio resource control release message received by the terminal device, where the second radio resource control release message is used to release the terminal device from the connected state to the inactive state. It is understood that the second radio resource control release message is a different message from the first radio resource control release message.

In summary, in the method provided in this embodiment, the first radio resource control release message may include pre-configuring uplink resources, or pre-configuring downlink resources, so that the terminal device performs subsequent inactive state data transmission based on the pre-configured resources, thereby eliminating the need for performing RRC state transition and reducing power consumption.

Referring to fig. 6 in combination, fig. 6 shows a flowchart of a data transmission method according to an exemplary embodiment of the present application, including the following steps:

step 61, the terminal device sends a radio resource control recovery request message and uplink data to the network device.

Step 62, the network device sends a first radio resource control release message to the terminal device.

The first radio resource control release message includes pre-configuring uplink resources or pre-configuring downlink resources.

Step 63, the terminal device sends uplink data to the network device.

And the terminal equipment sends uplink data to the network equipment based on the preconfigured uplink resources.

In step 64, the network device sends downlink data to the terminal device.

And the terminal equipment receives downlink data sent by the network equipment based on the pre-configured downlink resource.

Step 65, the terminal device sends uplink data to the network device.

And the terminal equipment sends the uplink data to the network equipment again based on the preconfigured uplink resource.

The above method embodiments may be implemented individually or in combination, and the present application is not limited thereto.

In the above-described respective embodiments, the steps performed by the terminal device may be implemented solely as the data transmission method on the terminal device side, and the steps performed by the network device may be implemented solely as the data transmission method on the network device side.

Fig. 7 shows a block diagram of a data transmission apparatus according to an exemplary embodiment of the present application, which may be implemented as a terminal device or as a part of a terminal device, the apparatus comprising: a transmission module;

a transmission module 701, configured to receive a first rrc release message after successful transmission of a first uplink small data transmission;

A transmission module 701, configured to perform subsequent inactive state data transmission according to the first radio resource control release message.

In an alternative embodiment, the first radio resource control release message includes: timer configuration information; the timer configuration information is used for configuring a timer; the apparatus further comprises: a timer start module 702; a timer starting module 702, configured to start a timer according to timer configuration information in the first radio resource control release message; a transmission module 701, configured to perform, during a running time of the timer, subsequent inactive state data transmission according to a schedule of the network device, where the inactive state data transmission includes: at least one of uplink data transmission and downlink data reception.

In an alternative embodiment, the scheduling uses C-RNTI scrambling.

In an alternative embodiment, the transmission module 701 is configured to end the inactive data transmission after the timer expires.

In an alternative embodiment, the first radio resource control release message includes: pre-configuring uplink resources or pre-configuring downlink resources; wherein the inactive state data transmission includes: at least one of uplink data transmission performed on the pre-configured uplink resources and downlink data reception performed on the pre-configured downlink resources.

In an alternative embodiment, the apparatus further comprises: a listening module 703; and the monitoring module 703 is configured to monitor downlink feedback scheduled by the network device for uplink data transmission.

In an alternative embodiment, the schedule is scrambled by the C-RNTI; or, the schedule is scrambled by a PUR-RNTI, which is a radio network temporary identifier bound to a pre-configured uplink resource.

In an alternative embodiment, the first radio resource control release message is multiplexed with the downlink data.

In an alternative embodiment, the first uplink small data transmission includes: a radio resource control resume request message.

In an alternative embodiment, the radio resource control recovery request message is multiplexed with the upstream data.

In an alternative embodiment, the small data transmission types corresponding to the first uplink small data transmission include: CG-based small data transfer; or, RACH based small data transmission.

In an alternative embodiment, the data corresponding to the inactive state data transmission is processed by a security key comprising: at least one of an encryption key and an integrity protection key; wherein the security key is derived from an NCC included in a second radio resource control release message received by the terminal device, the second radio resource control release message being used to release the terminal device from the connected state to the inactive state.

Fig. 8 shows a block diagram of a data transmission apparatus according to an exemplary embodiment of the present application, where the apparatus may be implemented as a network device or as a part of a network device, and the apparatus includes: a transmission module 801;

a transmission module 801, configured to send a first radio resource control release message to a terminal device after successfully receiving a first uplink small data transmission;

In an alternative embodiment, the first radio resource control release message includes: timer configuration information for configuring the timer.

In an alternative embodiment, the first radio resource control release message includes: pre-configuring uplink resources or pre-configuring downlink resources.

In an alternative embodiment, the transmission module 801 is configured to send a second radio resource control release message, where the second radio resource control release message is configured to release the terminal device from the connected state to the inactive state; the second radio resource control release message includes an NCC, where the NCC is configured to derive a security key, where the security key is configured to process data corresponding to the inactive state data transmission, and the security key includes: at least one of an encryption key and an integrity protection key.

Fig. 9 shows a schematic structural diagram of a communication device (terminal device or network device) according to an exemplary embodiment of the present application, where the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 via a bus 105.

The memory 104 may be used to store at least one instruction that the processor 101 is configured to execute to implement the various steps of the method embodiments described above.

Further, the memory 104 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-Only Memory (EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read-Only Memory, PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which are loaded and executed by a processor to implement the data transmission method performed by a communication device provided by the above respective method embodiments.

In an exemplary embodiment, a computer program product or a computer program is also provided, which comprises computer instructions stored in a computer-readable storage medium, which computer instructions are read from the computer-readable storage medium by a processor of a computer device, which computer instructions are executed by the processor, such that the computer device performs the data transmission method of the above aspect.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

A data transmission method, applied to a terminal device, where the terminal device is in an inactive state, the method comprising:

After successful transmission of the first uplink small data transmission, receiving a first radio resource control release message;

and executing subsequent inactive state data transmission according to the first radio resource control release message.
The method of claim 1, wherein the first radio resource control release message comprises: timer configuration information; the timer configuration information is used for configuring a timer;

the performing subsequent inactive state data transmission according to the first radio resource control release message includes:

starting the timer according to the timer configuration information in the first radio resource control release message;

and executing subsequent inactive state data transmission according to the scheduling of the network equipment in the running time of the timer, wherein the inactive state data transmission comprises the following steps: at least one of uplink data transmission and downlink data reception.
The method of claim 2, wherein the step of determining the position of the substrate comprises,

the scheduling is scrambled with a cell radio network temporary identifier C-RNTI.
The method according to claim 2, wherein the method further comprises:

and ending the inactive state data transmission after the timer is overtime.
The method of claim 1, wherein the first radio resource control release message comprises: pre-configuring uplink resources or pre-configuring downlink resources;

wherein the inactive state data transmission comprises: at least one of uplink data transmission performed on the preconfigured uplink resources and downlink data reception performed on the preconfigured downlink resources.
The method of claim 5, wherein the method further comprises:

and aiming at the uplink data transmission, monitoring downlink feedback scheduled by the network equipment.
The method of claim 6, wherein the step of providing the first layer comprises,

the scheduling is scrambled by a C-RNTI;

or alternatively, the first and second heat exchangers may be,

the scheduling is scrambled by a pre-configured uplink resource radio network temporary identifier, PUR-RNTI, which is a radio network temporary identifier bound to the pre-configured uplink resource.
The method according to any one of claims 1 to 7, wherein,

the first rrc release message is multiplexed with downlink data.
The method according to any one of claims 1 to 7, wherein,

the first uplink small data transmission includes: a radio resource control resume request message.
The method of claim 9, wherein the step of determining the position of the substrate comprises,

the radio resource control recovery request message is multiplexed with uplink data.
The method according to any one of claims 1 to 7, wherein the small data transmission type corresponding to the first uplink small data transmission includes:

authorizing CG based configuration small data transmissions;

or alternatively, the first and second heat exchangers may be,

small data transmission based on random access channel RACH.
The method according to any one of claims 1 to 7, wherein,

the data corresponding to the inactive state data transmission is processed by a security key, wherein the security key comprises: at least one of an encryption key and an integrity protection key;

wherein the security key is derived from a next hop count value NCC, the NCC being included in a second radio resource control release message received by the terminal device, the second radio resource control release message being used to release the terminal device from a connected state to an inactive state.
A data transmission method, characterized in that it is applied in a network device, the method comprising:

after the first uplink small data transmission is successfully received, a first radio resource control release message is sent to the terminal equipment;

The terminal equipment is in an inactive state, and the first radio resource control release message is used for indicating the terminal equipment to execute subsequent inactive state data transmission.
The method of claim 13, wherein the step of determining the position of the probe is performed,

the first radio resource control release message includes: timer configuration information, the timer configuration information is used for configuring a timer.
The method of claim 13, wherein the step of determining the position of the probe is performed,

the first radio resource control release message includes: pre-configuring uplink resources or pre-configuring downlink resources.
The method according to any one of claims 13 to 15, wherein,

the first rrc release message is multiplexed with downlink data.
The method according to any one of claims 13 to 15, wherein,

the first uplink small data transmission includes: a radio resource control resume request message.
The method of claim 17, wherein the step of determining the position of the probe is performed,

the radio resource control recovery request message is multiplexed with uplink data.
The method according to any one of claims 13 to 15, wherein the small data transmission type corresponding to the first uplink small data transmission includes:

Authorizing CG based configuration small data transmissions;

or alternatively, the first and second heat exchangers may be,

small data transmission based on random access channel RACH.
The method according to any one of claims 13 to 15, further comprising:

transmitting a second radio resource control release message, wherein the second radio resource control release message is used for releasing the terminal equipment from a connection state to an inactive state;

the second radio resource control release message includes a next hop count value NCC, where the NCC is configured to derive a security key, where the security key is configured to process data corresponding to the inactive state data transmission, and the security key includes: at least one of an encryption key and an integrity protection key.
A data transmission apparatus, for use in a terminal device, the terminal device being in an inactive state, the apparatus comprising: a transmission module;

the transmission module is used for receiving a first radio resource control release message after successful transmission of the first uplink small data transmission;

and the transmission module is used for executing subsequent inactive state data transmission according to the first radio resource control release message.
The apparatus of claim 21, wherein the first radio resource control release message comprises: timer configuration information; the timer configuration information is used for configuring a timer; the apparatus further comprises: a timer starting module;

the timer starting module is configured to start the timer according to the timer configuration information in the first radio resource control release message;

the transmission module is configured to perform, during the running time of the timer, subsequent inactive state data transmission according to scheduling of the network device, where the inactive state data transmission includes: at least one of uplink data transmission and downlink data reception.
The apparatus of claim 22, wherein the device comprises a plurality of sensors,

the scheduling is scrambled with a cell radio network temporary identifier C-RNTI.
The apparatus of claim 22, wherein the device comprises a plurality of sensors,

and the transmission module is used for ending the inactive state data transmission after the timer is overtime.
The apparatus of claim 21, wherein the first radio resource control release message comprises: pre-configuring uplink resources or pre-configuring downlink resources;

Wherein the inactive state data transmission comprises: at least one of uplink data transmission performed on the preconfigured uplink resources and downlink data reception performed on the preconfigured downlink resources.
The apparatus of claim 25, wherein the apparatus further comprises: a monitoring module;

the monitoring module is configured to monitor downlink feedback scheduled by the network device for the uplink data transmission.
The apparatus of claim 26, wherein the device comprises a plurality of sensors,

the scheduling is scrambled by a C-RNTI;

or alternatively, the first and second heat exchangers may be,

the scheduling is scrambled by a pre-configured uplink resource radio network temporary identifier, PUR-RNTI, which is a radio network temporary identifier bound to the pre-configured uplink resource.
The apparatus according to any one of claims 21 to 27, wherein,

the first rrc release message is multiplexed with downlink data.
The apparatus according to any one of claims 21 to 27, wherein,

the first uplink small data transmission includes: a radio resource control resume request message.
The apparatus of claim 29, wherein the device comprises a plurality of sensors,

the radio resource control recovery request message is multiplexed with uplink data.
The apparatus according to any one of claims 21 to 27, wherein the small data transmission type corresponding to the first uplink small data transmission includes:

authorizing CG based configuration small data transmissions;

or alternatively, the first and second heat exchangers may be,

small data transmission based on random access channel RACH.
The apparatus according to any one of claims 21 to 27, wherein,

the data corresponding to the inactive state data transmission is processed by a security key, wherein the security key comprises: at least one of an encryption key and an integrity protection key;

wherein the security key is derived from a next hop count value NCC, the NCC being included in a second radio resource control release message received by the terminal device, the second radio resource control release message being used to release the terminal device from a connected state to an inactive state.
A data transmission apparatus for use in a network device, the apparatus comprising: a transmission module;

the transmission module is used for sending a first radio resource control release message to the terminal equipment after successfully receiving the first uplink small data transmission;

the terminal equipment is in an inactive state, and the first radio resource control release message is used for indicating the terminal equipment to execute subsequent inactive state data transmission.
The apparatus of claim 33, wherein the device comprises a plurality of sensors,

the first radio resource control release message includes: timer configuration information, the timer configuration information is used for configuring a timer.
The apparatus of claim 33, wherein the device comprises a plurality of sensors,

the first radio resource control release message includes: pre-configuring uplink resources or pre-configuring downlink resources.
The apparatus according to any one of claims 33 to 35, wherein,

the first rrc release message is multiplexed with downlink data.
The apparatus according to any one of claims 33 to 35, wherein,

the first uplink small data transmission includes: a radio resource control resume request message.
The apparatus of claim 37, wherein the device comprises a plurality of sensors,

the radio resource control recovery request message is multiplexed with uplink data.
The apparatus according to any one of claims 33 to 35, wherein the small data transmission type corresponding to the first uplink small data transmission includes:

authorizing CG based configuration small data transmissions;

or alternatively, the first and second heat exchangers may be,

small data transmission based on random access channel RACH.
The apparatus according to any one of claims 33 to 35, wherein,

The transmission module is configured to send a second radio resource control release message, where the second radio resource control release message is used to release the terminal device from a connected state to an inactive state;

the second radio resource control release message includes a next hop count value NCC, where the NCC is configured to derive a security key, where the security key is configured to process data corresponding to the inactive state data transmission, and the security key includes: at least one of an encryption key and an integrity protection key.
A terminal device, characterized in that the terminal device comprises:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the data transmission method of any one of claims 1 to 12.
A network device, the network device comprising:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the data transmission method of any of claims 13 to 20.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the data transmission method of any one of claims 1 to 20.