Small data transmission method, device, equipment and medium

Abstract

The present application discloses a small data transmission method, device, equipment and medium, which relates to the field of mobile communications. The method is applied to a terminal, the terminal is in an inactive state, and the method includes: a network device configures a first RSRP threshold to the terminal, the terminal receives the first RSRP threshold configured by the network device; and a carrier is selected for the small data transmission according to the first RSRP threshold.

Description

Technical Field

[0001] The present application relates to the field of mobile communications, and in particular to a small data transmission method, device, equipment and medium. Background Art

[0002] In the New Radio (NR) system, the Radio Resource Control (RRC) states include: RRC_IDLE (idle state), RRC_INACTIVE (inactive state), and RRC_CONNECTED (connected state).

[0003] In the inactive state, the study of small data transmission (SDT) is introduced. SDT includes two directions: uplink small data transmission based on random access process and uplink small data transmission based on pre-configured resources.

[0004] In uplink small data transmission based on the random access process, if the cell provides multiple types of carriers at the same time, such as providing normal uplink (NUL) and supplementary uplink (SUL) carriers at the same time, how to perform uplink small data transmission is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiments of the present application provide a small data transmission method, apparatus, device and medium, and provide a small data transmission implementation scheme when a cell provides multiple carriers at the same time. The technical scheme is as follows:

[0006] According to one aspect of the present application, a carrier selection method for small data transmission is provided, which is applied to a terminal, and the method includes:

[0007] A first reference signal receiving power (RSRP) threshold configured by a receiving network device;

[0008] A carrier is selected for the small data transmission according to the first RSRP threshold.

[0009] According to another aspect of the present application, a carrier selection method for small data transmission is provided, which is applied to a network device, and the method includes:

[0010] A first RSRP threshold is configured for the terminal, where the first RSRP threshold is an RSRP threshold used to select a carrier for the small data transmission.

[0011] According to another aspect of the present application, a data transmission device is provided, the device comprising:

[0012] A receiving module, configured to receive a first RSRP threshold configured by a network device;

[0013] A processing module is used to select a carrier for the small data transmission according to the first RSRP threshold.

[0014] According to another aspect of the present application, a small data transmission device is provided, the device comprising:

[0015] The sending module is used to configure a first RSRP threshold for the terminal, where the first RSRP threshold is an RSRP threshold used to select a carrier for the small data transmission.

[0016] According to one aspect of the present application, a terminal is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the small data transmission method as described in the above aspects.

[0017] According to one aspect of the present application, a network device is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the small data transmission method as described in the above aspects.

[0018] According to one aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores executable instructions, and the executable instructions are loaded and executed by a processor to implement the small data transmission method as described in the above aspect.

[0019] According to one aspect of the present application, a computer program product or a computer program is provided, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the small data transmission method described in the above aspect.

[0020] According to one aspect of the present application, a chip is provided, wherein the chip is used to implement the small data transmission method as described in the above aspect.

[0021] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0022] By configuring a first RSRP threshold for the terminal by the network device, the first RSRP is used to select a carrier for SDT from at least two carriers for SDT. Therefore, when a cell provides multiple carriers, a reasonable carrier is selected based on the first RSRP threshold for SDT, thereby realizing SDT in a multi-carrier scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a block diagram of a communication system provided by an exemplary embodiment of the present application;

[0025] Figure 2 is a flow chart of a small data transmission method provided by an exemplary embodiment of the present application;

[0026] Figure 3 is a flow chart of a small data transmission method provided by an exemplary embodiment of the present application;

[0027] Figure 4 is a schematic diagram of a small data transmission method provided by an exemplary embodiment of the present application;

[0028] Figure 5 is a flow chart of a small data transmission method provided by an exemplary embodiment of the present application;

[0029] Figure 6 is a flow chart of a small data transmission method provided by an exemplary embodiment of the present application;

[0030] Figure 7 is a flow chart of a small data transmission method provided by an exemplary embodiment of the present application;

[0031] Figure 8 is a schematic diagram of multiple RSRP thresholds provided by an exemplary embodiment of the present application;

[0032] Fig. 9 is a schematic diagram of multiple RSRP thresholds provided by an exemplary embodiment of the present application;

[0033] Fig.10 is a schematic diagram of multiple RSRP thresholds provided by an exemplary embodiment of the present application;

[0034] Fig.11 is a schematic diagram of multiple RSRP thresholds provided by an exemplary embodiment of the present application;

[0035] Fig.12 is a structural block diagram of a small data transmission device provided by an exemplary embodiment of the present application;

[0036] Fig.13 is a structural block diagram of a small data transmission device provided by an exemplary embodiment of the present application;

[0037] Fig.14 It is a structural diagram of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0039] First, the nouns involved in the embodiments of the present application are briefly introduced:

[0040] Inactive Small Data Transmission (SDT):

[0041] SDT is a data transmission mode configured for terminals in an inactive state. Through SDT, the terminal can complete the transmission of service data without entering the connected state, thereby reducing the power consumption and overhead of the terminal device.

[0042] Exemplarily, SDT includes: uplink small data transmission based on random access process (two steps / four steps), and uplink small data transmission based on pre-configured resources (such as CG type1). The embodiment of the present application is mainly aimed at uplink small data transmission based on random access process (two steps / four steps).

[0043] Figure 1 A block diagram of a communication system provided by an exemplary embodiment of the present application is shown. The communication system may include: an access network 12 and a terminal 14.

[0044] The access network 12 includes several network devices 120. The network device 120 may be a base station, which is a device deployed in the access network to provide wireless communication functions for the terminal. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in an LTE system, it is called eNodeB or eNB; in a 5G NR-U system, it is called gNodeB or gNB. With the evolution of communication technology, the description of "base station" may change. For the convenience of the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal 14 are collectively referred to as network devices.

[0045] The terminal 14 may include various handheld devices with wireless communication functions, 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 (MS), terminals, etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminals. The network device 120 and the terminal 14 communicate with each other through some air interface technology, such as a Uu interface. Optionally, the terminal is in the RRC_INACTIVE state.

[0046] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Network (WLAN) system. Networks, WLAN), Wireless Fidelity (WiFi), next generation communication systems or other communication systems, etc.

[0047] Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication and vehicle to everything (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

[0048] In the uplink small data transmission based on the random access process (two-step / four-step), the terminal needs to select a suitable carrier, such as SUL or NUL, based on the measurement result of the current signal quality and the RSRP threshold configured by the network device before executing the random access process. Since SDT requires the terminal to transmit user data in an inactive state, the channel quality requirements for executing SDT are higher than those for the random access process; at the same time, the coverage range for executing SDT may also be smaller than the maximum coverage of each carrier. This application proposes a solution for UE to select a carrier for executing SDT and to determine whether the channel conditions for executing SDT are met.

[0049] Figure 2 FIG. 1 is a flowchart of a small data transmission method provided by an exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0050] Step 202: The network device configures a first RSRP threshold for the terminal;

[0051] The first RSRP threshold is an RSRP threshold for selecting a carrier for small data transmission. That is, the first RSRP threshold is an RSRP threshold for selecting a carrier for small data transmission from at least two carriers provided in a cell.

[0052] In some embodiments, the first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold for carrier selection during the random access process. The first RSRP threshold and the second RSRP threshold share the same configuration process. The second RSRP threshold can be considered as an existing RSRP threshold or a traditional RSRP threshold.

[0053] In some embodiments, the first RSRP threshold is different from the second RSRP threshold. The first RSRP threshold and the second RSRP threshold are configured using different procedures.

[0054] Step 204: The terminal receives a first RSRP threshold configured by the network device;

[0055] Step 206: The terminal selects a carrier for small data transmission according to the first RSRP threshold.

[0056] Illustratively, when the RSRP threshold of the current cell where the terminal resides is greater than the first RSRP threshold, the first carrier is selected for small data transmission; when the RSRP threshold of the current cell where the terminal resides is less than the first RSRP threshold, the second carrier is selected for small data transmission.

[0057] When the RSRP threshold of the current cell where the terminal resides is equal to the first RSRP threshold, the first carrier or the second carrier is selected for small data transmission. This embodiment takes the selection of the first carrier for small data transmission as an example for explanation.

[0058] To summarize, the method provided in this embodiment configures a first RSRP threshold for the terminal by the network device, and the first RSRP is used to select a carrier for SDT from at least two carriers for SDT. Therefore, when a cell provides multiple carriers, a reasonable carrier is selected based on the first RSRP threshold for SDT, thereby realizing SDT in a multi-carrier scenario.

[0059] For the case where the first RSRP threshold and the second RSRP threshold share the same configuration process:

[0060] Figure 3 FIG. 1 is a flowchart of a small data transmission method provided by another exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0061] Step 302: The network device configures a second RSRP threshold for the terminal, where the second RSRP threshold is an RSRP threshold for selecting a carrier during a random access process;

[0062] In this embodiment, the second RSRP threshold and the first RSRP threshold share the same configuration process. Optionally, after configuring the second RSRP threshold, the network device no longer configures the first RSRP threshold separately.

[0063] Step 304: The terminal receives a second RSRP threshold configured by the network device;

[0064] Step 306: The terminal determines the second RSRP threshold as the first RSRP threshold;

[0065] Step 308: The terminal selects a carrier for small data transmission according to the first RSRP threshold.

[0066] In an illustrative manner, when the RSRP threshold of the current cell where the terminal resides is greater than or equal to the first RSRP threshold, a first carrier, such as a NUL carrier, is selected for small data transmission; when the RSRP threshold of the current cell where the terminal resides is less than the first RSRP threshold, a second carrier, such as a SUL carrier, is selected for small data transmission.

[0067] In an illustrative manner, when the RSRP threshold of the current cell in which the terminal resides is greater than the first RSRP threshold, a first carrier, such as a NUL carrier, is selected for small data transmission; when the RSRP threshold of the current cell in which the terminal resides is less than or equal to the first RSRP threshold, a second carrier, such as a SUL carrier, is selected for small data transmission.

[0068] In summary, in the method provided in this embodiment, since the first RSRP threshold and the second RSRP threshold share the same configuration process, the network side may not modify or modify less the existing process, thereby improving compatibility with existing communication protocols.

[0069] For the case where the first RSRP threshold and the second RSRP threshold do not share the same configuration process:

[0070] Figure 4 FIG. 1 is a flowchart of a small data transmission method provided by another exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0071] Step 402: The network device configures a first RSRP threshold for the terminal, where the first RSRP threshold is different from the second RSRP threshold;

[0072] In this embodiment, the second RSRP threshold and the first RSRP threshold use different configuration processes, for example, a newly added information element (IE) is used to configure the first RSRP threshold. Optionally, after configuring the second RSRP threshold, the network device separately configures the first RSRP threshold to the terminal; or, after configuring the first RSRP threshold, the network device separately configures the second RSRP threshold to the terminal.

[0073] The configuration method of the first RSRP threshold includes at least one of the following:

[0074] A first RSRP threshold value;

[0075] The network device directly configures the threshold value of the first RSRP threshold to the terminal.

[0076] Scaling factor, the first RSRP threshold is equal to the product of the second RSRP threshold and the scaling factor;

[0077] The network device configures the scaling factor and the second RSRP threshold to the terminal, and the two can be configured separately or simultaneously. The terminal receives the scaling factor and the second RSRP threshold configured by the network device. The terminal calculates the product of the scaling factor and the second RSRP threshold as the first RSRP threshold.

[0078] · Compensation value, the first RSRP threshold is equal to the sum of the second RSRP threshold and the compensation value.

[0079] The network device configures the compensation value and the second RSRP threshold to the terminal, and the two can be configured separately or simultaneously. The terminal receives the compensation value and the second RSRP threshold configured by the network device. The terminal calculates the sum of the compensation value and the second RSRP threshold as the first RSRP threshold.

[0080] In some embodiments, the first RSRP threshold is greater than the second RSRP threshold.

[0081] Step 404: The terminal receives a first RSRP threshold configured by the network device;

[0082] In some embodiments, the terminal receives a first RSRP threshold directly configured by the network device.

[0083] In some embodiments, the terminal receives a second RSRP threshold and a scaling factor configured by the network device, and calculates a product of the scaling factor and the second RSRP threshold as the first RSRP threshold.

[0084] In some embodiments, the terminal receives a second RSRP threshold and a compensation value configured by the network device, and calculates a sum of the compensation value and the second RSRP threshold as the first RSRP threshold.

[0085] Step 406: The terminal selects a carrier for small data transmission according to the first RSRP threshold.

[0086] In an illustrative manner, when the RSRP threshold of the current cell where the terminal resides is greater than or equal to the first RSRP threshold, a first carrier, such as a NUL carrier, is selected for small data transmission; when the RSRP threshold of the current cell where the terminal resides is less than the first RSRP threshold, a second carrier, such as a SUL carrier, is selected for small data transmission.

[0087] In an illustrative manner, when the RSRP threshold of the current cell in which the terminal resides is greater than the first RSRP threshold, a first carrier, such as a NUL carrier, is selected for small data transmission; when the RSRP threshold of the current cell in which the terminal resides is less than or equal to the first RSRP threshold, a second carrier, such as a SUL carrier, is selected for small data transmission.

[0088] To sum up, in the method provided in this embodiment, since the first RSRP threshold and the second RSRP threshold use their own configuration processes respectively, the network side can configure a first RSRP threshold that is higher than the second RSRP threshold, so that the terminal selects a carrier with better channel quality for SDT, thereby improving the transmission reliability of SDT.

[0089] The first RSRP threshold may include: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N.

[0090] Figure 5 FIG. 1 is a flowchart of a small data transmission method provided by another exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0091] Step 502: The network device configures N RSRP sub-thresholds for the terminal, and the i-th RSRP sub-threshold corresponds to the i-th data volume threshold;

[0092] N RSRP sub-thresholds and data volume thresholds are exemplified as follows:

[0093] The first data volume threshold corresponding to the first RSRP sub-threshold is 2000 bits;

[0094] The second data volume threshold corresponding to the second RSRP sub-threshold is 1500 bits;

[0095] …;

[0096] The Nth data volume threshold corresponding to the Nth RSRP sub-threshold is 100 bits;

[0097] Exemplarily, the first RSRP subthreshold>the second RSRP subthreshold...>the Nth RSRP subthreshold, the first data volume threshold>the second data volume threshold...>the Nth data volume threshold. That is, the N RSRP subthresholds are arranged in order from large to small, and the N data volume thresholds are arranged in order from large to small. Alternatively, the N RSRP subthresholds are arranged in order from small to large, and the N data volume thresholds are arranged in order from small to large.

[0098] Optionally, the network device configures N RSRP sub-thresholds and N data volume thresholds for the terminal.

[0099] Step 504: The terminal receives N RSRP sub-thresholds configured by the network device;

[0100] The terminal receives N RSRP sub-thresholds and N data volume thresholds configured by the network device. In some embodiments, the N data volume thresholds may be preset values.

[0101] Step 506: If the amount of data to be transmitted by the terminal is less than the i-th data amount threshold, and the RSRP of the current cell where the terminal resides is greater than the i-th RSRP sub-threshold, a first carrier is selected for small data transmission;

[0102] Optionally, the first carrier is NUL and the second carrier is SUL.

[0103] Step 508: If the amount of data to be transmitted by the terminal is greater than each of the N data amount thresholds, or the RSRP of the current cell where the terminal resides is less than each of the N RSRP sub-thresholds, a second carrier is selected for small data transmission.

[0104] If the amount of data to be transmitted is less than or equal to the first data amount threshold corresponding to the first RSRP sub-threshold, and the RSRP of the current resident cell is greater than or equal to the first RSRP sub-threshold, the terminal chooses to perform SDT on NUL; otherwise, the terminal continues to judge;

[0105] If the amount of data to be transmitted is less than or equal to the second data amount threshold corresponding to the second RSRP sub-threshold, and the RSRP of the current resident cell is greater than or equal to the second RSRP sub-threshold, the terminal chooses to perform SDT on NUL; otherwise, the terminal continues to judge;

[0106] …;

[0107] If the amount of data to be transmitted is less than or equal to the Nth data amount threshold corresponding to the Nth RSRP subthreshold, and the RSRP of the current resident cell is greater than or equal to the Nth RSRP subthreshold, the terminal chooses to perform SDT on the NUL; otherwise, the terminal chooses to perform SDT on the SUL.

[0108] To sum up, the method provided in this embodiment provides N RSRP sub-thresholds, each RSRP sub-threshold corresponds to a different data volume threshold, and the terminal selects a carrier according to the RSRP sub-threshold corresponding to the amount of data to be transmitted. It can more accurately select a suitable carrier for SDT and improve the transmission reliability of small data transmission.

[0109] The network device may also configure the terminal with a target RSRP threshold for determining whether the current channel quality supports SDT.

[0110] Figure 6 FIG. 1 is a flowchart of a small data transmission method provided by another exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0111] Step 602: The network device configures a target RSRP threshold for the terminal, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality supports the execution of SDT;

[0112] Step 604: The terminal receives the target RSRP threshold configured by the network device;

[0113] Step 606: The terminal determines, according to the target RSRP threshold, whether to perform SDT on the carrier selected based on the first RSRP threshold.

[0114] In an illustrative manner, when the RSRP threshold of the current cell in which the terminal resides is greater than or equal to the target RSRP threshold, SDT is performed on the carrier selected based on the first RSRP threshold; when the RSRP threshold of the current cell in which the terminal resides is less than the target RSRP threshold, SDT is not performed on the carrier selected based on the first RSRP threshold.

[0115] In an illustrative manner, when the RSRP threshold of the current cell in which the terminal resides is greater than the target RSRP threshold, SDT is performed on the carrier selected based on the first RSRP threshold; when the RSRP threshold of the current cell in which the terminal resides is less than or equal to the target RSRP threshold, SDT is not performed on the carrier selected based on the first RSRP threshold.

[0116] Optionally, the terminal needs to further determine whether other conditions for executing SDT are met. For example, other conditions for executing SDT include: whether there are transmission resources or time-frequency resources for executing SDT.

[0117] If the RSRP of the current cell where the terminal resides is greater than or equal to the target RSRP and other conditions for executing SDT are met, SDT is executed on the carrier selected based on the first RSRP threshold; if the RSRP of the current cell where the terminal resides is less than the target RSRP, or other conditions for executing SDT are not met, SDT is not executed on the carrier selected based on the first RSRP threshold.

[0118] It should be noted that the judgment process of the first RSRP threshold, the judgment process of the target RSRP threshold, and the judgment process of other conditions for executing SDT can be performed separately, simultaneously, or sequentially.

[0119] When the above three judgment processes are executed sequentially, the judgment process of the first RSRP threshold may be performed first, then the judgment process of the target RSRP threshold may be performed, and finally the judgment process of other conditions for executing SDT may be performed. Other orders may also be used, which are not limited in this embodiment.

[0120] In summary, the method provided in this embodiment also configures a target RSRP threshold for the terminal through a network device, and the terminal determines whether to perform SDT on the carrier selected based on the first RSRP threshold according to the target RSRP threshold, thereby achieving reliable SDT transmission in a smaller available coverage area.

[0121] The target RSRP threshold may be one or more. When there are multiple available carriers, each carrier corresponds to the same or different target RSRP threshold.

[0122] Figure 7 FIG. 1 is a flowchart of a small data transmission method provided by another exemplary embodiment of the present application. The method can be applied to Figure 1 In the terminal and the network device shown, the terminal is in an inactive state, and the method includes:

[0123] Step 702: The network device configures a third RSRP threshold and a fourth RSRP threshold for the terminal;

[0124] The third RSRP threshold is used to determine whether the current channel quality supports performing SDT on the first carrier;

[0125] The fourth RSRP threshold is used to determine whether the current channel quality supports performing SDT on the second carrier.

[0126] Optionally, the first carrier is a NUL carrier, and the second carrier is a SUL carrier.

[0127] Step 704: The terminal receives the third RSRP threshold and the fourth RSRP threshold configured by the network device;

[0128] Step 706: If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and greater than or equal to the third RSRP threshold, perform SDT on the first carrier;

[0129] If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and less than the third RSRP threshold, SDT is not performed on the first carrier.

[0130] Optionally, the terminal needs to further determine whether other conditions for executing SDT are met. For example, other conditions for executing SDT include: whether there are transmission resources or time-frequency resources for executing SDT.

[0131] In an illustrative manner, if the RSRP of the cell in which the terminal currently resides is greater than or equal to the first RSRP threshold, and greater than or equal to the third RSRP threshold, and other conditions for executing SDT are met, SDT is executed on the first carrier. If the RSRP of the cell in which the terminal currently resides is greater than or equal to the first RSRP threshold, and less than the third RSRP threshold, SDT is not executed on the first carrier. Alternatively, when other conditions for executing SDT are not met, SDT is not executed on the first carrier.

[0132] Step 708: If the RSRP of the cell where the terminal currently resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, SDT is performed on the second carrier.

[0133] If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and less than the fourth RSRP threshold, SDT is not performed on the first carrier.

[0134] If the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, and other conditions for performing SDT are met, SDT is performed on the second carrier. If the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and less than the fourth RSRP threshold, SDT is not performed on the second carrier. Alternatively, when other conditions for performing SDT are not met, SDT is not performed on the first carrier.

[0135] In summary, the method provided in this embodiment can improve the judgment accuracy of the target RSRP threshold by configuring different target RSRP thresholds for different carriers, and allowing the terminal to determine whether to perform SDT on the carrier selected based on the first RSRP threshold according to different target RSRP thresholds.

[0136] It should be noted that the above method embodiments can be implemented separately or in combination, and this application does not limit this.

[0137] In the above-mentioned embodiments, the steps executed by the terminal device can be independently implemented as a small data transmission method on the terminal device side, and the steps executed by the network device can be independently implemented as a small data transmission method on the network device side.

[0138] exist Figure 8In the exemplary example shown, the network device configures a first RSRP threshold for the UE, wherein the first RSRP threshold is the same as the RSRP threshold used for carrier selection in the random access process. Optionally, the network device configures a third RSRP threshold and a fourth RSRP threshold for the NUL and SUL, respectively, wherein the third RSRP threshold is used for the UE to determine whether the current channel quality can perform SDT on the NUL, and the fourth RSRP threshold is used for the UE to determine whether the current channel quality can perform SDT on the SUL.

[0139] After triggering SDT, the UE compares the RSRP of the current cell with the first RSRP threshold:

[0140] If the RSRP of the current cell is greater than or equal to the first RSRP threshold, the UE selects the NUL carrier;

[0141] If the RSRP of the current cell is less than the first RSRP threshold, the UE selects the SUL carrier;

[0142] Furthermore, the UE compares the RSRP of the current cell to which it is residing with the target RSRP threshold configured on the selected carrier:

[0143] If the UE selects the NUL carrier, the RSRP of the current cell is compared with the third RSRP threshold. If it is greater than or equal to the third RSRP threshold, it is further determined whether other conditions for executing SDT are met. If so, SDT is executed. If it is less than the third RSRP threshold or other conditions for executing SDT are not met, the UE does not execute SDT.

[0144] If the UE selects the SUL carrier, the RSRP of the current resident cell is compared with the fourth RSRP threshold. If it is greater than or equal to the fourth RSRP threshold, it is further determined whether other conditions for executing SDT are met. If so, SDT is executed. If it is less than the fourth RSRP threshold or other conditions for executing SDT are not met, the UE does not execute SDT.

[0145] exist Fig. 9 In the exemplary example shown, the network device configures a first RSRP threshold for the UE, wherein the first RSRP threshold is the same as the RSRP threshold used for carrier selection during the random access process; the network device configures a target RSRP threshold for the UE, and the target RSRP threshold is used by the UE to determine whether the current channel quality meets the conditions for executing SDT.

[0146] After the UE triggers SDT, it compares the RSRP of the current cell it is in with the first RSRP threshold:

[0147] If the RSRP of the current cell is greater than or equal to the first RSRP threshold, the UE selects NUL;

[0148] If the RSRP of the current cell is less than the first RSRP threshold, the UE selects SUL;

[0149] The UE compares the RSRP of the current cell with the target RSRP threshold:

[0150] If the RSRP of the current camping cell is greater than or equal to the target RSRP threshold, the UE further determines whether other conditions for executing SDT are met. If so, SDT is executed;

[0151] If the RSRP of the current cell is less than the target RSRP threshold, or other conditions for executing SDT are not met, the UE does not execute SDT.

[0152] Optionally, the UE may also compare the RSRP of the current cell with the target RSRP threshold before selecting a carrier, and then compare the RSRP of the current cell with the first RSRP threshold when the RSRP of the current cell is greater than or equal to the target RSRP threshold.

[0153] exist Fig.10 In the exemplary example shown, the network device configures a first RSRP threshold for the UE, wherein the first RSRP threshold is used for the UE to select a carrier for performing SDT, and the first RSRP threshold is different from the second RSRP threshold used for carrier selection in the random access process. Optionally, the first RSRP threshold is greater than or equal to the second RSRP threshold; the configuration method of the first RSRP threshold includes at least one of the following methods:

[0154] A first RSRP threshold value;

[0155] Scaling factor, first RSRP threshold = second RSRP threshold * scaling factor;

[0156] Compensation value, first RSRP threshold = second RSRP threshold + compensation value;

[0157] Optionally, the network device further configures a target RSRP threshold for the UE, where the target RSRP threshold is used by the UE to determine whether the current channel quality meets the conditions for executing SDT;

[0158] After the UE triggers SDT, it compares the RSRP of the current cell it is in with the first RSRP threshold:

[0159] If the RSRP of the current camping cell is greater than or equal to the first RSRP threshold, the UE chooses to perform SDT on the NUL;

[0160] If the RSRP of the current camping cell is less than the first RSRP threshold, the UE chooses to perform SDT on the SUL;

[0161] Optionally, if the network device configures a target RSRP threshold for the UE, and the UE selects SUL in step 2, the UE further compares the RSRP of the current resident cell with the target RSRP threshold:

[0162] If the RSRP of the current cell is greater than or equal to the target RSRP threshold, the UE further determines whether other conditions for executing SDT are met. If so, SDT is performed on the SUL carrier;

[0163] If the RSRP of the current cell is less than the target RSRP threshold, or other conditions for executing SDT are not met, the UE does not execute SDT.

[0164] Optionally, the UE may also compare the RSRP of the current cell with the target RSRP threshold before selecting a carrier, and then compare the RSRP of the current cell with the first RSRP threshold when the RSRP of the current cell is greater than or equal to the target RSRP threshold.

[0165] exist Fig.11 In the exemplary example shown, the network device configures N RSRP sub-thresholds for the UE, each RSRP sub-threshold corresponds to a different data volume threshold; the UE selects a carrier for performing SDT according to the RSRP corresponding to the satisfied data volume threshold; for example:

[0166] The data volume threshold corresponding to the first RSRP sub-threshold is 2000 bits;

[0167] The data volume threshold corresponding to the second RSRP sub-threshold is 1500 bits;

[0168] …;

[0169] The data volume threshold corresponding to the Nth RSRP sub-threshold is 100 bits;

[0170] Among them, the first RSRP sub-threshold>the second RSRP sub-threshold...>the Nth RSRP sub-threshold.

[0171] Among them, the N RSRP sub-thresholds used for SDT carrier selection are different from the second RSRP threshold used for carrier selection in the random access process; optionally, the network device also configures a target RSRP threshold for the UE, and the target RSRP threshold is used by the UE to determine whether the current channel quality meets the conditions for executing SDT.

[0172] After the UE triggers SDT, it selects the carrier for SDT based on the amount of data to be transmitted and the RSRP of the current cell where it resides. Specifically:

[0173] If the amount of data to be transmitted is less than or equal to the data amount threshold corresponding to the first RSRP sub-threshold, and the RSRP of the current resident cell is greater than or equal to the first RSRP sub-threshold, the UE chooses to perform SDT on the NUL; otherwise, the UE continues to judge;

[0174] If the amount of data to be transmitted is less than or equal to the data amount threshold corresponding to the second RSRP sub-threshold, and the RSRP of the current resident cell is greater than or equal to the second RSRP sub-threshold, the UE chooses to perform SDT on the NUL; otherwise, the UE continues to judge;

[0175] …;

[0176] If the amount of data to be transmitted is less than or equal to the data amount threshold corresponding to the Nth RSRP sub-threshold, and the RSRP of the current resident cell is greater than or equal to the Nth RSRP sub-threshold, the UE chooses to perform SDT on the NUL; otherwise, the UE chooses to perform SDT on the SUL;

[0177] Optionally, if the network configures a target RSRP threshold for the UE, and the UE selects SUL in step 2, the UE further compares the RSRP of the current resident cell with the target RSRP threshold:

[0178] If the RSRP of the current cell is greater than or equal to the target RSRP threshold, the UE performs SDT;

[0179] If the RSRP of the current cell is less than the target RSRP threshold, the UE does not perform SDT;

[0180] Optionally, the UE may also compare the RSRP of the current cell with the target RSRP threshold before selecting a carrier, and then compare the RSRP of the current cell with N RSRP sub-thresholds when the RSRP of the current cell is greater than or equal to the target RSRP threshold.

[0181] Optionally, after selecting a carrier for executing SDT, the UE needs to further determine whether other execution conditions are met.

[0182] Fig.12 The structure block diagram of a small data transmission device 1200 provided by an exemplary embodiment of the present application is shown. The device can be implemented as a terminal, or implemented as a part of a terminal. The device 1200 includes: a receiving module 1220 and a processing module 1240:

[0183] A receiving module 1220, configured to receive a first RSRP threshold configured by a network device;

[0184] The processing module 1240 is configured to select a carrier for the small data transmission according to the first RSRP threshold.

[0185] In an optional implementation of this embodiment, the first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is the RSRP threshold for carrier selection during the random access process.

[0186] In an optional implementation of this embodiment, the configuration manner of the first RSRP threshold includes at least one of the following:

[0187] The first RSRP threshold value;

[0188] A scaling factor, wherein the first RSRP threshold value is equal to a product of the second RSRP threshold value and the scaling factor;

[0189] compensation value, the first RSRP threshold value is equal to the sum of the second RSRP threshold value and the compensation value.

[0190] In an optional implementation of this embodiment, the first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

[0191] In an optional implementation of this embodiment, the processing module 1240 is used to select a first carrier for the small data transmission if the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold; if the RSRP of the current cell where the terminal resides is less than the first RSRP threshold, select a second carrier for the small data transmission.

[0192] In an optional implementation of this embodiment, the first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N.

[0193] In an optional implementation of this embodiment, the processing module 1240 is used to select a first carrier for the small data transmission if the amount of data to be transmitted by the terminal is less than the i-th data amount threshold and the RSRP of the current cell where the terminal resides is greater than the i-th RSRP sub-threshold; if the amount of data to be transmitted by the terminal is greater than each of the N data amount thresholds, or the RSRP of the current cell where the terminal resides is less than each of the N RSRP sub-thresholds, select a second carrier for the small data transmission.

[0194] In an optional implementation of this embodiment, the receiving module 1220 is further used to receive a target RSRP threshold configured by the network device, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality supports the execution of SDT.

[0195] In an optional implementation of this embodiment, the processing module 1240 is configured to perform the SDT on a carrier selected based on the first RSRP threshold if the RSRP of the current cell where the terminal resides is greater than or equal to the target RSRP threshold.

[0196] In an optional implementation of this embodiment, the processing module 1240 is used to perform the SDT on the carrier selected based on the first RSRP threshold if the RSRP of the current cell where the terminal resides is greater than or equal to the target RSRP and other conditions for performing SDT are met.

[0197] In an optional implementation of this embodiment, the target RSRP threshold includes:

[0198] A third RSRP threshold, wherein the third RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the first carrier:

[0199] A fourth RSRP threshold, wherein the fourth RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the second carrier.

[0200] In an optional implementation of this embodiment, the processing module 1240 is used to perform the SDT on the first carrier if the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and greater than or equal to the third RSRP threshold; if the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, perform the SDT on the second carrier.

[0201] In an optional implementation of this embodiment, the processing module 1240 is configured to perform the SDT on the first carrier if the RSRP of the current camping cell of the terminal is greater than or equal to the first RSRP threshold, and greater than or equal to the third RSRP threshold, and other conditions for performing SDT are met;

[0202] The processing module 1240 is configured to perform the SDT on the second carrier if the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, and the other conditions for performing the SDT are met.

[0203] In an optional implementation of this embodiment, the other conditions for executing SDT include:

[0204] Whether there are transmission resources required for the SDT.

[0205] Fig.13The structure block diagram of a small data transmission device 1300 provided by an exemplary embodiment of the present application is shown. The device can be implemented as a network device, or implemented as a part of a network device. The device 1300 includes:

[0206] The sending module 1320 is used to configure a first RSRP threshold for the terminal, where the first RSRP threshold is an RSRP threshold used to select a carrier for the small data transmission.

[0207] In an optional implementation of this embodiment, the first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is the RSRP threshold for carrier selection during the random access process.

[0208] In an optional implementation of this embodiment, the configuration manner of the first RSRP threshold includes at least one of the following:

[0209] The first RSRP threshold value;

[0210] A scaling factor, wherein the first RSRP threshold value is equal to a product of the second RSRP threshold value and the scaling factor;

[0211] compensation value, the first RSRP threshold value is equal to the sum of the second RSRP threshold value and the compensation value.

[0212] In an optional implementation of this embodiment, the first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

[0213] In an optional implementation of this embodiment, the first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N.

[0214] In an optional implementation of this embodiment, the sending module 1320 is used to configure a target RSRP threshold for the terminal, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality of the terminal supports the execution of SDT.

[0215] In an optional implementation of this embodiment, the target RSRP threshold includes:

[0216] a third RSRP threshold, where the third RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the first carrier;

[0217] A fourth RSRP threshold, where the fourth RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the second carrier.

[0218] Fig.14 A schematic diagram of the structure of a communication device (terminal or network device) provided by an exemplary embodiment of the present application is shown. The communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104 and a bus 105.

[0219] The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

[0220] The receiver 102 and the transmitter 103 may be implemented as a communication component, which may be a communication chip.

[0221] The memory 104 is connected to the processor 101 via a bus 105 .

[0222] The memory 104 may be used to store at least one instruction, and the processor 101 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0223] In addition, the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage device includes but is not limited to: a magnetic disk or an optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0224] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the small data transmission method performed by a communication device provided by the above-mentioned various method embodiments.

[0225] In an exemplary embodiment, a computer program product or a computer program is also provided, which includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the small data transmission method described in the above aspects.

[0226] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0227] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A small data transmission method, characterized in that: Applied in a terminal, the method includes: A first reference signal received power RSRP threshold configured by a receiving network device; Selecting a carrier for the small data transmission SDT according to the first RSRP threshold, The first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N. The selecting a carrier for the small data transmission according to the first RSRP threshold includes: If the amount of data to be transmitted of the terminal is less than the i-th data amount threshold, and the RSRP of the current cell where the terminal resides is greater than the i-th RSRP sub-threshold, selecting a first carrier for the small data transmission; If the amount of data to be transmitted of the terminal is greater than each of the N data amount thresholds, or the RSRP of the current cell where the terminal resides is less than each of the N RSRP sub-thresholds, a second carrier is selected for the small data transmission.

2. The method according to claim 1, characterized in that The first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is an RSRP threshold for carrier selection during a random access process.

3. The method according to claim 2, characterized in that The configuration manner of the first RSRP threshold includes at least one of the following: The first RSRP threshold value; A scaling factor, the first RSRP threshold is equal to a product of the second RSRP threshold and the scaling factor; compensation value, the first RSRP threshold is equal to the sum of the second RSRP threshold and the compensation value.

4. The method according to claim 1, characterized in that: The first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

5. The method according to any one of claims 2 to 4, characterized in that: The selecting a carrier for the small data transmission according to the first RSRP threshold includes: If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold, selecting a first carrier for the small data transmission; If the RSRP of the cell where the terminal currently resides is less than the first RSRP threshold, a second carrier is selected for the small data transmission.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: A target RSRP threshold configured by the network device is received, where the target RSRP threshold is an RSRP threshold used to determine whether current channel quality supports execution of SDT.

7. The method according to claim 6, characterized in that The method further comprises: If the RSRP of the current cell where the terminal resides is greater than or equal to the target RSRP threshold, the SDT is performed on a carrier selected based on the first RSRP threshold.

8. The method according to claim 7, characterized in that If the RSRP of the current resident cell is greater than or equal to the target RSRP threshold, performing the SDT on a carrier selected based on the first RSRP threshold includes: If the RSRP of the cell where the terminal currently resides is greater than or equal to the target RSRP and other conditions for performing SDT are met, the SDT is performed on the carrier selected based on the first RSRP threshold.

9. The method according to claim 7, characterized in that: The target RSRP threshold includes: A third RSRP threshold, wherein the third RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the first carrier; A fourth RSRP threshold, wherein the fourth RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the second carrier.

10. The method according to claim 9, characterized in that The method further comprises: If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and greater than or equal to the third RSRP threshold, performing the SDT on the first carrier; If the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, the SDT is performed on the second carrier.

11. The method according to claim 10, characterized in that If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and greater than the third RSRP threshold, performing the SDT on the first carrier includes: If the RSRP of the current cell where the terminal resides is greater than or equal to the first RSRP threshold and greater than the third RSRP threshold, and other conditions for performing SDT are met, performing the SDT on the first carrier; If the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, performing the SDT on the second carrier includes: If the RSRP of the current cell where the terminal resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, and the other conditions for executing SDT are met, the SDT is executed on the second carrier.

12. The method according to claim 8 or 11, characterized in that: The other conditions for executing SDT include: Whether there are transmission resources required for the SDT.

13. A small data transmission method, characterized in that: Applied in a network device, the method comprises: configuring a first RSRP threshold for the terminal, where the first RSRP threshold is an RSRP threshold for selecting a carrier for the small data transmission, The first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N. The N RSRP sub-thresholds are used by the terminal to select a carrier for small data transmission according to the following conditions: If the amount of data to be transmitted of the terminal is less than the i-th data amount threshold, and the RSRP of the current cell where the terminal resides is greater than the i-th RSRP sub-threshold, selecting a first carrier for the small data transmission; If the amount of data to be transmitted of the terminal is greater than each of the N data amount thresholds, or the RSRP of the current cell where the terminal resides is less than each of the N RSRP sub-thresholds, a second carrier is selected for the small data transmission.

14. The method according to claim 13, characterized in that The first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is an RSRP threshold for carrier selection during a random access process.

15. The method according to claim 14, characterized in that The configuration manner of the first RSRP threshold includes at least one of the following: The first RSRP threshold value; A scaling factor, wherein the first RSRP threshold value is equal to a product of the second RSRP threshold value and the scaling factor; compensation value, the first RSRP threshold value is equal to the sum of the second RSRP threshold value and the compensation value.

16. The method according to claim 13, characterized in that The first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

17. The method according to any one of claims 13 to 16, characterized in that: The method further comprises: A target RSRP threshold is configured for the terminal, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality of the terminal supports the execution of SDT.

18. The method according to claim 17, characterized in that The target RSRP threshold includes: a third RSRP threshold, where the third RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the first carrier; A fourth RSRP threshold, where the fourth RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the second carrier.

19. A small data transmission device, characterized in that: The device comprises: A receiving module, configured to receive a first RSRP threshold configured by a network device; a processing module, configured to select a carrier for the small data transmission according to the first RSRP threshold, The first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N. Wherein, the processing module is also used for: If the amount of data to be transmitted of the small data transmission device is less than the i-th data amount threshold, and the RSRP of the current resident cell of the small data transmission device is greater than the i-th RSRP sub-threshold, selecting a first carrier for the small data transmission; If the amount of data to be transmitted by the small data transmission device is greater than each of the N data amount thresholds, or the RSRP of the cell where the small data transmission device currently resides is less than each of the N RSRP sub-thresholds, a second carrier is selected for the small data transmission.

20. The device according to claim 19, characterized in that The first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is an RSRP threshold for carrier selection during a random access process.

21. The device according to claim 20, characterized in that The configuration manner of the first RSRP threshold includes at least one of the following: The first RSRP threshold value; A scaling factor, wherein the first RSRP threshold value is equal to a product of the second RSRP threshold value and the scaling factor; compensation value, the first RSRP threshold value is equal to the sum of the second RSRP threshold value and the compensation value.

22. The device according to claim 19, characterized in that The first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

23. The device according to any one of claims 20 to 22, characterized in that The processing module is used to select a first carrier for the small data transmission if the RSRP of the cell where the device currently resides is greater than or equal to the first RSRP threshold; if the RSRP of the cell where the device currently resides is less than the first RSRP threshold, select a second carrier for the small data transmission.

24. The device according to any one of claims 19 to 23, characterized in that The receiving module is further used to receive a target RSRP threshold configured by the network device, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality supports the execution of SDT.

25. The device according to claim 24, characterized in that The processing module is configured to perform the SDT on a carrier selected based on the first RSRP threshold if the RSRP of the cell in which the device currently resides is greater than or equal to the target RSRP threshold.

26. The device according to claim 25, characterized in that The processing module is configured to perform the SDT on a carrier selected based on the first RSRP threshold if the RSRP of the cell where the device currently resides is greater than or equal to the target RSRP and other conditions for performing the SDT are met.

27. The device according to claim 25, characterized in that The target RSRP threshold includes: A third RSRP threshold, wherein the third RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the first carrier; A fourth RSRP threshold, wherein the fourth RSRP threshold is used to determine whether the current channel quality supports performing the SDT on the second carrier.

28. The device according to claim 27, characterized in that The processing module is used to perform the SDT on the first carrier if the RSRP of the cell in which the device currently resides is greater than or equal to the first RSRP threshold and greater than or equal to the third RSRP threshold; if the RSRP of the cell in which the device currently resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, perform the SDT on the second carrier.

29. The device according to claim 28, characterized in that The processing module is configured to perform the SDT on the first carrier if the RSRP of the cell in which the device currently resides is greater than or equal to the first RSRP threshold, and greater than or equal to the third RSRP threshold, and other conditions for performing the SDT are met; The processing module is configured to perform the SDT on the second carrier if the RSRP of the cell where the device currently resides is less than the first RSRP threshold and greater than the fourth RSRP threshold, and the other conditions for performing the SDT are met.

30. The device according to claim 26 or 29, characterized in that The other conditions for executing SDT include: Whether there are transmission resources required for the SDT.

31. A small data transmission device, characterized in that: The device comprises: a sending module, configured to configure a first RSRP threshold for a terminal, wherein the first RSRP threshold is an RSRP threshold for selecting a carrier for the small data transmission, The first RSRP threshold includes: N RSRP sub-thresholds, the i-th RSRP sub-threshold corresponds to the i-th data volume threshold, N is an integer greater than 1, and i is an integer not greater than N. The N RSRP sub-thresholds are used by the terminal to select a carrier for small data transmission according to the following conditions: If the amount of data to be transmitted of the terminal is less than the i-th data amount threshold, and the RSRP of the current cell where the terminal resides is greater than the i-th RSRP sub-threshold, selecting a first carrier for the small data transmission; If the amount of data to be transmitted of the terminal is greater than each of the N data amount thresholds, or the RSRP of the current cell where the terminal resides is less than each of the N RSRP sub-thresholds, a second carrier is selected for the small data transmission.

32. The device according to claim 31, characterized in that The first RSRP threshold is different from the second RSRP threshold, and the second RSRP threshold is an RSRP threshold for carrier selection during a random access process.

33. The device according to claim 32, characterized in that The configuration manner of the first RSRP threshold includes at least one of the following: The first RSRP threshold value; A scaling factor, wherein the first RSRP threshold value is equal to a product of the second RSRP threshold value and the scaling factor; compensation value, the first RSRP threshold value is equal to the sum of the second RSRP threshold value and the compensation value.

34. The device according to claim 31, characterized in that The first RSRP threshold is the same as the second RSRP threshold, and the second RSRP threshold is the RSRP threshold used for carrier selection in the random access process.

35. The device according to any one of claims 31 to 34, characterized in that The device also includes: The sending module is used to configure a target RSRP threshold for the terminal, where the target RSRP threshold is an RSRP threshold used to determine whether the current channel quality of the terminal supports the execution of SDT.

36. The device according to claim 35, characterized in that The target RSRP threshold includes: a third RSRP threshold, where the third RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the first carrier; A fourth RSRP threshold, where the fourth RSRP threshold is used to determine whether the current channel quality of the terminal supports performing the SDT on the second carrier.

37. A terminal, characterized in that: The terminal comprises: processor; a transceiver connected to the processor; a memory for storing executable instructions for the processor; The processor is configured to load and execute the executable instructions to implement the small data transmission method as claimed in any one of claims 1 to 12.

38. A network device, characterized in that: The network equipment includes: processor; a transceiver connected to the processor; a memory for storing executable instructions for the processor; The processor is configured to load and execute the executable instructions to implement the small data transmission method as claimed in any one of claims 13 to 18.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the small data transmission method as described in any one of claims 1 to 12, or the small data transmission method as described in any one of claims 13 to 18.

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