Data transmission method, electronic device and storage medium

Abstract

The present application discloses a data transmission method, including: a terminal device transmitting small data or small data transmission indication information based on the maximum transmission block size of a physical uplink shared channel (PUSCH) in a first type of random access. The present application also discloses another data transmission method, a terminal device, a network device, and a storage medium.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a data transmission method, electronic device, and storage medium. Background Art

[0002] After small data transmission is introduced in the two-step random access channel (RACH), how terminal devices perform small data transmission in order to effectively utilize network resources has not yet been clarified. Summary of the Invention

[0003] To solve the above technical problems, the embodiments of the present application provide a data transmission method, an electronic device, and a storage medium, which can effectively utilize network resources.

[0004] In a first aspect, an embodiment of the present application provides a data transmission method, including: a terminal device transmits small data or transmits small data indication information based on the maximum transmission block size of a physical uplink shared channel (PUSCH) in a first type of random access.

[0005] In a second aspect, an embodiment of the present application provides a data transmission method, including: a network device receives small data indication information, and the small data indication information is transmitted when the size of the small data to be transmitted by the terminal device is smaller than the maximum transmission block size of the PUSCH in the first type of random access.

[0006] In a third aspect, an embodiment of the present application provides a terminal device, the terminal device comprising:

[0007] The first sending unit is configured to transmit small data or transmission small data indication information based on a maximum transport block size of a physical uplink shared channel PUSCH in the first type of random access.

[0008] In a fourth aspect, an embodiment of the present application provides a network device, comprising: a fourth receiving unit, configured to receive small data indication information, wherein the small data indication information is transmitted when the size of the small data to be transmitted by the terminal device is smaller than the maximum transmission block size of the physical uplink shared channel PUSCH in the first type of random access.

[0009] In a fifth aspect, an embodiment of the present application provides a terminal device, comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, executes the steps of the data transmission method executed by the above-mentioned terminal device.

[0010] In a sixth aspect, an embodiment of the present application provides a network device comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, executes the steps of the data transmission method performed by the above-mentioned network device.

[0011] In a seventh aspect, an embodiment of the present application provides a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method executed by the above-mentioned terminal device.

[0012] In an eighth aspect, an embodiment of the present application provides a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method executed by the above-mentioned network device.

[0013] In a ninth aspect, an embodiment of the present application provides a storage medium storing an executable program, which, when executed by a processor, implements the data transmission method executed by the above-mentioned terminal device.

[0014] In a tenth aspect, an embodiment of the present application provides a storage medium storing an executable program, which, when executed by a processor, implements the data transmission method executed by the above-mentioned network device.

[0015] In an eleventh aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the data transmission method executed by the above-mentioned terminal device.

[0016] In a twelfth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the data transmission method executed by the above-mentioned network device.

[0017] In a thirteenth aspect, an embodiment of the present application provides a computer program, which enables a computer to execute the data transmission method executed by the above-mentioned terminal device.

[0018] In a fourteenth aspect, an embodiment of the present application provides a computer program, which enables a computer to execute the data transmission method executed by the above-mentioned network device.

[0019] The data transmission method provided in the embodiment of the present application includes: the terminal device transmits small data or transmits small data indication information based on the maximum transmission block size of the physical uplink shared channel PUSCH in the first type of random access. If the size of the small data to be transmitted by the terminal device is smaller than the maximum transmission block size of the PUSCH, the terminal device can directly transmit the small data, thereby improving the efficiency of data transmission. If the size of the small data to be transmitted by the terminal device is smaller than the maximum transmission block size of the PUSCH, the terminal device can report the small data indication information to the network device, such as reporting the size of the small data, so that the network device can dynamically schedule the transmission of the small data in the future, thereby saving the resources of the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the processing flow of small data transmission for this application;

[0021] Figure 2 This is a schematic diagram of the processing flow of the second type of random access in this application;

[0022] Figure 3 Schematic diagram of the processing flow of the first type of random access in this application

[0023] Figure 4 This is a schematic diagram of the structure of the communication system according to an embodiment of the present application;

[0024] Figure 5 A schematic diagram of an optional processing flow of the data transmission method provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of another optional processing flow of the data transmission method provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0028] Figure 9 This is a schematic diagram of the hardware structure of the electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0030] Currently, driven by the increasing demand for speed, latency, high-speed mobility, and energy efficiency, coupled with the increasing diversity and complexity of future services, the 3GPP international standards organization has begun developing 5G. The main application scenarios for 5G are: Enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and Massive Machine Type Communications (mMTC).

[0031] eMBB continues to focus on providing users with multimedia content, services, and data, and demand for this technology is growing rapidly. Since eMBB can be deployed in diverse scenarios, such as indoors, in urban areas, and in rural areas, its capabilities and requirements vary significantly. Therefore, it's difficult to generalize and requires detailed analysis based on specific deployment scenarios. Typical applications of URLLC include industrial automation, power automation, remote medical operations (surgery), and traffic safety. Typical characteristics of mMTC include high connection density, low data volumes, latency-insensitive services, low module costs, and long lifespans.

[0032] In the early deployment of New Radio (NR), it was difficult to obtain complete NR coverage; therefore, the typical network coverage was a combination of wide-area LTE coverage and NR island coverage. In addition, since a large number of LTE systems are deployed in spectrum below 6 GHz, there is very little spectrum below 6 GHz available for NR systems; therefore, NR systems must study spectrum applications above 6 GHz. However, high-frequency spectrum has the disadvantages of limited coverage and rapid signal fading. At the same time, in order to protect mobile operators' initial investments in LTE systems, a tight interworking mode between LTE and NR systems was proposed. NR systems can also operate independently. In NR systems, the maximum channel bandwidth can be 400 MHZ (wideband carrier). Compared to the maximum 20 MHz bandwidth of LTE systems, the bandwidth of NR systems is very large.

[0033] In the LTE system, Early Data Transmission (EDT), i.e. small data transmission, has been introduced. The processing flow diagram of small data transmission is as follows: Figure 1As shown, the terminal device may always remain in an idle state, a suspended state, or an inactive state. In steps a to h, the connection between the terminal device and the network device is not established. However, in steps e and f, the network device and the serving gateway complete the transmission of uplink and / or downlink small data packets. During the small data transmission process, the terminal device completes the small data transmission without entering the connected state; the transmission of small data is different from the transmission of MBB services when the terminal device enters the connected state.

[0034] For small data transmission, the network device will configure a maximum transport block (TB) size (size) that the current network device allows to transmit on SIB2. If the terminal device determines that the amount of data to be transmitted is less than the maximum TBsize, the terminal device can initiate EDT; otherwise, the terminal device triggers the connection establishment process and enters the connected state to transmit data.

[0035] The first type of random access and the second type of random access are briefly described below.

[0036] In the NR system, RACH includes: first-type random access and second-type random access. In first-type random access, two information exchanges are required between the terminal device and the network device; therefore, first-type random access is also called two-step random access (2-steps RACH). In second-type random access, four information exchanges are required between the terminal device and the network device; therefore, second-type random access is also called four-step random access (4-steps RACH). Depending on the random access method, random access includes contention-based random access and non-contention-based random access. Depending on the random access type, random access includes first-type random access and second-type random access. The following briefly describes first-type random access and second-type random access, respectively.

[0037] The second type of random access processing flow is as follows: Figure 2 As shown, it includes the following four steps:

[0038] Step S101: The terminal device sends a random access preamble (Preamble) to the network device via Msg 1.

[0039] The terminal device sends the selected Preamble on the selected PRACH time domain resource; the network device can estimate the uplink Timing and the size of the uplink grant required by the terminal device to transmit Msg3 based on the Preamble.

[0040] In step S102, after the network device detects that a terminal device has sent a Preamble, it sends a Random Access Response (RAR) message to the terminal device through Msg2 to inform the terminal device of the uplink resource information that can be used when sending Msg3, allocates a temporary Radio Network Temporary Identity (RNTI) to the terminal device, and provides a time advance command to the terminal device.

[0041] Step S103: After receiving the RAR message, the terminal device sends Msg3 in the uplink resources specified by the RAR message.

[0042] The Msg3 message is mainly used to inform the network device of the event that triggered the RACH process. For example, if it is an initial random access event, the Msg3 will carry the terminal device ID and establishment cause; if it is an RRC re-establishment event, the Msg3 will carry the terminal device ID and establishment cause in the connected state.

[0043] Meanwhile, the contention conflict of the ID carried in Msg3 may be resolved in step S104.

[0044] Step S104: The network device sends Msg4 to the terminal device, where Msg4 includes a contention resolution message and allocates uplink transmission resources to the terminal device.

[0045] When the terminal device receives Msg4 sent by the network device, it will detect whether the terminal device specific temporary identifier sent by the terminal device in Msg3 is included in the contention resolution message sent by the base station. If it is included, it indicates that the random access process of the terminal device is successful. Otherwise, it is considered that the random process has failed, and the terminal device needs to initiate the random access process again from the first step.

[0046] Another function of Msg4 is to send a radio resource control (RRC) configuration message to the terminal device.

[0047] The above RACH process needs to be completed through four information exchanges between the network device and the terminal device, which leads to a prolonged RACH process. In order to solve the problem of prolonged RACH process, the first type of random access is proposed. The processing flow of the first type of random access is as follows: Figure 3 As shown, the following steps are included:

[0048] Step S201: The terminal device sends MsgA to the network device.

[0049] MsgA consists of a preamble and a payload. Optionally, the preamble is the same as that used in the second type of random access and is transmitted on the PRACH resource. The payload carries the same information as that in Msg3 in the second type of random access, such as RRC signaling when the RRC is in the idle state and the C-RNTI when the RRC is in the connected state. The payload can be transmitted on the Physical Uplink Shared Channel (PUSCH).

[0050] The results of the network device receiving MsgA may include the following two: first, the network device successfully decodes one or more preambles; second, the network device successfully decodes one or more preambles and one or more payloads.

[0051] Step S202: The terminal device receives MsgB sent by the network device.

[0052] Optionally, MsgB includes the contents of Msg2 and Msg4 in the second type of random access.

[0053] In the first type of random access process, PUSCH resources are pre-configured through broadcast messages. PUSCH resources are used to carry RRC messages to be sent by terminal devices. Since the RRC message at the time of initial establishment is of a fixed size, the size of PUSCH resources is also fixed.

[0054] However, with the introduction of small data transmission, the PUSCH in the first type of random access needs to carry small data, which leads to a corresponding increase in the size of pre-configured PUSCH resources. However, since network equipment cannot determine when the terminal device will initiate small data transmission, blindly increasing the PUSCH resource size will result in a waste of network resources. Therefore, how to reasonably and effectively transmit small data in the first type of random access has not yet been clarified.

[0055] Based on the above problems, the present application provides a data transmission method. 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-U) system, NR on unlicensed spectrum (NR-U) system, universal mobile telecommunication system (UMTS), world interoperability for microwave access (WMI), etc. access, WiMAX) communication system, wireless local area networks (WLAN), wireless fidelity (WiFi), next generation communication system or other communication systems, etc.

[0056] The system architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0057] The network devices involved in the embodiments of the present application may be ordinary base stations (such as NodeB or eNB or gNB), new radio controllers (new radio controller, NR controller), centralized network elements (centralized unit), new wireless base stations, radio frequency remote modules, micro base stations, relays, distributed network elements (distributed unit), transmission reception points (TRP), transmission points (TP) or any other devices. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network devices. For the convenience of description, in all embodiments of the present application, the above-mentioned devices that provide wireless communication functions for terminal devices are collectively referred to as network devices.

[0058] In the embodiments of the present application, the terminal device may be any terminal, for example, the terminal device may be a user equipment for machine type communication. That is, the terminal device may also be referred to as a user equipment UE, a mobile station (MS), a mobile terminal, a terminal, etc. The terminal device may communicate with one or more core networks via a radio access network (RAN). For example, the terminal device may be a mobile phone (or a "cellular" phone), a computer with a mobile terminal, etc. For example, the terminal device may also be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. This is not specifically limited in the embodiments of the present application.

[0059] Optionally, the network device and terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed in the air on aircraft, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of the network device and terminal device.

[0060] Optionally, the network device and the terminal device, and the terminal device and the terminal device may communicate through a licensed spectrum (licensed spectrum), or may communicate through an unlicensed spectrum (unlicensed spectrum), or may communicate through both a licensed spectrum and an unlicensed spectrum. The network device and the terminal device, and the terminal device and the terminal device may communicate through a spectrum below 7 gigahertz (GHz), or may communicate through a spectrum above 7 GHz, or may communicate using a spectrum below 7 GHz and a spectrum above 7 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

[0061] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0062] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 4 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0063] The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal device" includes, but is not limited to, a device that is connected via a wired line, such as a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another terminal device configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, web browsers, organizers, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal device may be referred to as an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

[0064] Optionally, terminal devices 120 may perform device-to-device (D2D) communication with each other.

[0065] Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0066] Figure 4 One network device and two terminal devices are shown as an example. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area. This embodiment of the present application does not limit this.

[0067] Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0068] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be called a communication device. Figure 4 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here; the communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0069] An optional processing flow of the data transmission method provided in the embodiment of the present application is as follows: Figure 5 As shown, the following steps are included:

[0070] Step S301: The terminal device transmits small data or transmits small data indication information based on the maximum transmission block size of the PUSCH in the first type of random access.

[0071] In some embodiments, in the first type of random access (2-step RACH), the network device can configure 2-step RACH resources for the terminal device through a system broadcast message, such as random access opportunities (RACH Occasion, RO) and PUSCH resources. The PUSCH resources indicate the maximum transport block (TB) size that can be transmitted by the PUSCH.

[0072] In some embodiments, the small data to be transmitted by the terminal device may be data in the EDT. Before transmitting the small data, the terminal device may compare the size of the small data to be transmitted with the TB size of the PUSCH; and transmit the small data or transmit the small data indication information based on the size relationship between the two.

[0073] The data transmission method in the embodiment of the present application is described below based on different relationships between the size of the small data to be transmitted and the TB size of the PUSCH.

[0074] Example 1

[0075] In a case where the size of the small data to be transmitted by the terminal device is less than or equal to the maximum transmission block size, the terminal device transmits the small data.

[0076] In some embodiments, the terminal device may transmit only the small data in the PUSCH. In this scenario, the size of the data transmitted on the PUSCH is the size of the small data; that is, the resources in the 2-step RACH are dedicated resources for the terminal device, and the resources may be configured by the network device to the terminal device when the connection is released.

[0077] In other embodiments, the terminal device may transmit the small data and the radio resource control message via the PUSCH; that is, the small data and the radio resource control message may be multiplexed on the PUSCH for transmission. In this scenario, the size of the data transmitted on the PUSCH is the sum of the size of the small data and the size of the radio resource control message. The radio resource control message may be a radio resource control resume request (RRC Resume Request) message.

[0078] Example 2

[0079] In the case where the size of the small data to be transmitted by the terminal device is larger than the maximum transmission block size, the terminal device needs to further determine the size of the small data to be transmitted and the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and determine whether the maximum transmission block size can accommodate the size of the small data indication information. In the case where the size of the small data to be transmitted by the terminal device is larger than the maximum transmission block size, the size of the small data is not larger than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information, the terminal device transmits the small data indication information.

[0080] For example, the size of the small data to be transmitted is 1500kb, the maximum transmission block size of PUSCH is 1000kb, and the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access is 2000kb; that is, the size of the small data to be transmitted by the terminal device is larger than the maximum transmission block size, and the size of the small data is not larger than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access; if the maximum transmission block size of PUSCH can accommodate the size of the small data indication information, the terminal device transmits the small data indication information.

[0081] In some embodiments, the terminal device transmits only the small data indication information via the PUSCH. In this scenario, the size of the data transmitted on the PUSCH is the size of the small data indication information. That is, the resources in the two-step RACH are dedicated resources for the terminal device, and the resources may be configured by the network device to the terminal device when the connection is released.

[0082] In other embodiments, the terminal device may transmit the small data indication information and the radio resource control message via the PUSCH; that is, the small data indication information and the radio resource control message may be multiplexed on the PUSCH for transmission. In this scenario, the size of the data transmitted on the PUSCH is the sum of the size of the small data indication information and the size of the radio resource control message. The radio resource control message may be a radio resource control resume request (RRC Resume Request) message.

[0083] In some further embodiments, the terminal device transmits the small data indication information and part of the small data via the PUSCH; that is, the small data indication information and part of the data to be transmitted are multiplexed on the PUSCH for transmission. In this scenario, the small data indication information may further indicate the size of the remaining data to be transmitted; so that after the network device receives the PUSCH, it schedules the terminal device to transmit the small data on the PUSCH via MsgB / RAR according to the small data size information indicated in the small data indication information. Therefore, the terminal device can receive the scheduling information sent by the network device, and the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

[0084] In an embodiment of the present application, the small data indication information may include: first indication information for indicating small data, and / or second indication information for indicating the size of the small data. The first indication information indicates that the data to be transmitted by the terminal device is small data, and the first indication information may be only 1 bit. The second indication information may be carried in a first MAC CE, or carried in a buffer status report (Buffer Status Report, BSR) MAC CE. The first MAC CE is a new MAC CE that is different from the existing MAC CE; for example, the first MAC CE is different in form from the existing MAC CE, or carries different information content, etc.

[0085] In some embodiments, the data transmission method may further include:

[0086] Step S300: The terminal device receives third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

[0087] In a specific implementation, the third indication information can be sent by a network device. When the indication information is used to indicate that the terminal device is allowed to use the PUSCH to transmit the small data, the terminal device can transmit the small data based on the maximum transmission block size of the PUSCH in the first type of random access.

[0088] In some embodiments, the data transmission method may further include:

[0089] Step S300': The terminal device receives fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

[0090] The above-mentioned data transmission method provided in the embodiment of the present application is described for the scenario where the size of the small data is less than or equal to the maximum transmission block size, and the scenario where the size of the small data is greater than the maximum transmission block size and the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

[0091] Then, when the network device does not allow the terminal device to use the PUSCH to transmit the small data, or the size of the small data to be transmitted by the terminal device is greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, the terminal device uses the first type of random access to establish a wireless resource control connection; the terminal device transmits the small data when entering the connected state.

[0092] Another optional processing flow of the data transmission method provided in the embodiment of the present application is as follows: Figure 6 As shown, the following steps are included:

[0093] Step S401: A network device receives small data or small data indication information via a PUSCH in a first type of random access.

[0094] In some embodiments, when the size of the small data is less than or equal to the maximum transport block size of the PUSCH in the first type of random access, the network device receives the small data. In a specific implementation, the network device can receive only the small data through the PUSCH; or the network device can receive and transmit the small data and radio resource control message through the PUSCH.

[0095] In other embodiments, the network device receives the small data indication information when the size of the small data is larger than the maximum transmission block size, the size of the small data is not larger than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

[0096] The small data indication information may include: first indication information for indicating small data, and / or second indication information for indicating the size of the small data. The first indication information indicates that the data to be transmitted by the terminal device is small data, and the first indication information may be only 1 bit. The second indication information may be carried in a first MAC CE or in a BSR MAC CE. The first MAC CE is a new MAC CE that is different from the existing MAC CE; for example, the first MAC CE is different in form from the existing MAC CE, or carries different information content.

[0097] In some embodiments, the network device receives the small data indication information, including: the network device receives only the small data indication information through the PUSCH; or, the network device receives the small data indication information and a wireless resource control message through the PUSCH; or, the network device receives the small data indication information and part of the small data through the PUSCH.

[0098] In the case where the network device receives the small data indication information and part of the small data through the PUSCH, the small indication information is also used to indicate the size of the remaining data to be transmitted in the small data. In this scenario, the method may further include:

[0099] Step S402: The network device sends scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

[0100] In the data transmission method provided in the embodiment of the present application, the method may further include:

[0101] Step S400: The network device sends third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

[0102] In the data transmission method provided in the embodiment of the present application, the method may further include:

[0103] Step S400': The network device sends fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

[0104] In the embodiment of the present application, the first type of random access may be a two-step random access.

[0105] In the above embodiments of the present application, small data can be transmitted in a two-step RACH. Specifically, if the size of the small data to be transmitted by the terminal device is smaller than the maximum TB size of the PUSCH, the terminal device can directly use MsgA to transmit the small data; if the size of the small data to be transmitted by the terminal device is smaller than the maximum TB size of the PUSCH, the terminal device can report small data indication information, such as the size of the small data, through MsgA, so that the network device can subsequently dynamically schedule the transmission of the small data, thereby saving network device resources.

[0106] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0107] In order to implement the above data transmission method, the embodiment of the present application further provides a terminal device, the component structure of the terminal device is as follows: Figure 7 As shown, the terminal device 500 includes:

[0108] The first sending unit 501 is configured to transmit small data or transmission small data indication information based on a maximum transport block size of a PUSCH in a first type of random access.

[0109] In some embodiments, the small data indication information includes: first indication information for indicating small data, and / or second indication information for indicating the size of the small data.

[0110] In some embodiments, the second indication information is carried in a first MAC CE or a BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

[0111] In some embodiments, the terminal device 500 further includes:

[0112] The first receiving unit 502 is configured to receive third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

[0113] In some embodiments, the terminal device 500 further includes:

[0114] The second receiving unit 503 is configured to receive fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

[0115] In some embodiments, the first sending unit 501 is configured to transmit the small data if the size of the small data is less than or equal to the maximum transmission block size.

[0116] In some embodiments, the first sending unit 501 is configured to transmit only the small data through the PUSCH; or, to transmit the small data and a radio resource control message through the PUSCH.

[0117] In some embodiments, the first sending unit 501 is configured to transmit the small data indication information when the size of the small data is greater than the maximum transmission block size, the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

[0118] In some embodiments, the first sending unit 501 is configured to transmit only the small data indication information through the PUSCH; or, to transmit the small data indication information and a radio resource control message through the PUSCH.

[0119] In some embodiments, the first sending unit 501 is configured to transmit the small data indication information and part of the small data through the PUSCH.

[0120] In some embodiments, the small data indication information is further used to indicate the size of the remaining data to be transmitted in the small data.

[0121] In some embodiments, the terminal device 500 further includes: a third receiving unit 504 configured to receive scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

[0122] In some embodiments, the first sending unit 501 is further configured to establish a wireless resource control connection using the first type of random access when the network device does not allow the terminal device to use the PUSCH to transmit the small data, or the size of the small data is greater than the maximum amount of data that can be transmitted when the first type of random access transmits the small data indication information; and transmit the small data when entering the connected state.

[0123] In some embodiments, the first type of random access includes: 2-step random access.

[0124] In order to implement the above data transmission method, the embodiment of the present application further provides a network device, the composition structure of the network device is as follows: Figure 8 As shown, the network device 600 includes:

[0125] The fourth receiving unit 601 is configured to receive small data or small data indication information through the PUSCH in the first type of random access.

[0126] In some embodiments, the small data indication information includes: first indication information for indicating small data, and / or second indication information for indicating the size of the small data.

[0127] In some embodiments, the second indication information is carried in a first MAC CE or a BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

[0128] In some embodiments, the network device 600 further includes: a second sending unit 602 configured to send third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

[0129] In some embodiments, the network device 600 further includes: a third sending unit 603, configured to send fourth indication information, where the fourth indication information is used to indicate the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

[0130] In some embodiments, the fourth receiving unit 601 is configured to receive the small data if the size of the small data is less than or equal to the maximum transport block size of the PUSCH in the first type of random access.

[0131] In some embodiments, the fourth receiving unit 601 is configured to receive only the small data through the PUSCH; or receive and transmit the small data and a radio resource control message through the PUSCH.

[0132] In some embodiments, the fourth receiving unit 601 is configured to receive the small data indication information when the size of the small data is greater than the maximum transmission block size, the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

[0133] In some embodiments, the fourth receiving unit 601 is configured to receive only the small data indication information through the PUSCH; or, to receive the small data indication information and a radio resource control message through the PUSCH.

[0134] In some embodiments, the fourth receiving unit 601 is configured to receive the small data indication information and part of the small data through the PUSCH.

[0135] In some embodiments, the small data indication information is further used to indicate the size of the remaining data to be transmitted in the small data.

[0136] In some embodiments, the network device 600 further includes: a fourth sending unit 604 configured to send scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

[0137] In some embodiments, the first type of random access includes: 2-step random access.

[0138] An embodiment of the present application also provides a terminal device, including a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is used to execute the steps of the data transmission method executed by the above-mentioned terminal device when running the computer program.

[0139] An embodiment of the present application also provides a network device, including a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is used to execute the steps of the data transmission method executed by the above-mentioned network device when running the computer program.

[0140] An embodiment of the present application also provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method executed by the above-mentioned terminal device.

[0141] An embodiment of the present application further provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method executed by the above-mentioned network device.

[0142] An embodiment of the present application further provides a storage medium storing an executable program, which, when executed by a processor, implements the data transmission method executed by the above-mentioned terminal device.

[0143] An embodiment of the present application further provides a storage medium storing an executable program, which, when executed by a processor, implements the data transmission method executed by the above-mentioned network device.

[0144] An embodiment of the present application also provides a computer program product, including computer program instructions, which enable a computer to execute the data transmission method executed by the above-mentioned terminal device.

[0145] An embodiment of the present application also provides a computer program product, including computer program instructions, which enable a computer to execute the data transmission method executed by the above-mentioned network device.

[0146] An embodiment of the present application further provides a computer program, which enables a computer to execute the data transmission method executed by the above-mentioned terminal device.

[0147] An embodiment of the present application further provides a computer program, which enables a computer to execute the data transmission method executed by the above-mentioned network device.

[0148] Figure 9 705 is a schematic diagram of the hardware structure of the electronic device (terminal device and network device) of the embodiment of the present application. The electronic device 700 includes: at least one processor 701, a memory 702 and at least one network interface 704. The various components in the electronic device 700 are coupled together through a bus system 705. It can be understood that the bus system 705 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 9 Various buses are labeled as bus system 705.

[0149] It is understood that the memory 702 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); the magnetic surface memory can be a magnetic disk or a magnetic tape. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM). The memory 702 described in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

[0150] The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the electronic device 700. Examples of such data include any computer program for operating on the electronic device 700, such as the application 7022. The program for implementing the method of the embodiment of the present application may be included in the application 7022.

[0151] The methods disclosed in the above embodiments of the present application can be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by the hardware integrated logic circuit in the processor 701 or by instructions in the form of software. The above processor 701 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware.

[0152] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), FPGAs, general-purpose processors, controllers, MCUs, MPUs, or other electronic components to perform the aforementioned method.

[0153] An embodiment of the present application also provides a storage medium for storing a computer program.

[0154] Optionally, the storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes in the various methods in the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0155] Optionally, the storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes in the various methods in the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0156] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0157] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0158] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0159] The above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A data transmission method, comprising: The terminal device transmits small data indication information based on the maximum transport block size of the physical uplink shared channel PUSCH in the first type of random access. The small data indication information includes: First indication information for indicating small data, and second indication information for indicating the size of the small data; and The second indication information is carried in a first media access control unit MAC CE or a buffer status report BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

2. The method according to claim 1, wherein The method further comprises: The terminal device receives third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

3. The method according to claim 1, wherein The method further comprises: The terminal device receives fourth indication information, where the fourth indication information is used to indicate the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

4. The method according to claim 1, wherein When the size of the small data is greater than the maximum transmission block size, the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information, the terminal device transmits the small data indication information.

5. The method according to claim 4, wherein The terminal device transmitting the small data indication information includes: The terminal device transmits only the small data indication information through the PUSCH; Alternatively, the terminal device transmits the small data indication information and wireless resource control message through the PUSCH.

6. The method according to claim 4, wherein: The terminal device transmitting the small data indication information includes: The terminal device transmits the small data indication information and part of the small data through the PUSCH.

7. The method according to claim 6, wherein: The small data indication information is further used to indicate the remaining data size to be transmitted in the small data.

8. The method according to claim 7, wherein: The method further comprises: The terminal device receives scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

9. The method according to any one of claims 1 to 8, wherein: The first type of random access includes: 2-step random access.

10. A data transmission method, the method comprising: The network device receives small data indication information through the physical uplink shared channel PUSCH in the first type of random access. The small data indication information includes: First indication information for indicating small data, and second indication information for indicating the size of the small data; and The second indication information is carried in a first media access control unit MAC CE or a buffer status report BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

11. The method according to claim 10, wherein: The method further comprises: The network device sends third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

12. The method according to claim 10, wherein: The method further comprises: The network device sends fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

13. The method according to claim 10, wherein: The network device receives the small data indication information when the size of the small data is larger than the maximum transmission block size of the PUSCH in the first type of random access, the size of the small data is not larger than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

14. The method according to claim 13, wherein: The network device receiving small data indication information includes: The network device receives only the small data indication information through the PUSCH; Alternatively, the network device receives the small data indication information and the radio resource control message through the PUSCH.

15. The method according to claim 13, wherein The network device receiving small data indication information includes: The network device receives the small data indication information and part of the small data through the PUSCH.

16. The method according to claim 15, wherein The small data indication information is further used to indicate the remaining data size to be transmitted in the small data.

17. The method according to claim 16, wherein The method further comprises: The network device sends scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

18. The method according to any one of claims 10 to 17, wherein: The first type of random access includes: 2-step random access.

19. A terminal device, comprising: The first sending unit is configured to transmit small data indication information based on a maximum transport block size of a physical uplink shared channel PUSCH in a first type of random access, The small data indication information includes: First indication information for indicating small data, and second indication information for indicating the size of the small data; and The second indication information is carried in a first media access control unit MAC CE or a buffer status report BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

20. The terminal device according to claim 19, wherein: The terminal device further includes: The first receiving unit is configured to receive third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

21. The terminal device according to claim 19, wherein: The terminal device further includes: The second receiving unit is configured to receive fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

22. The terminal device according to claim 19, wherein: The first sending unit is configured to transmit the small data indication information when the size of the small data is greater than the maximum transmission block size, the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

23. The terminal device according to claim 22, wherein: The first sending unit is configured to transmit only the small data indication information through the PUSCH; Alternatively, the small data indication information and the radio resource control message are transmitted through the PUSCH.

24. The terminal device according to claim 22, wherein: The first sending unit is configured to transmit the small data indication information and part of the small data through the PUSCH.

25. The terminal device according to claim 24, wherein: The small data indication information is further used to indicate the remaining data size to be transmitted in the small data.

26. The terminal device according to claim 25, wherein: The terminal device further includes: The third receiving unit is configured to receive scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

27. The terminal device according to any one of claims 19 to 26, wherein: The first type of random access includes: 2-step random access.

28. A network device, comprising: The fourth receiving unit is configured to receive small data indication information through a physical uplink shared channel PUSCH in the first type of random access, The small data indication information includes: First indication information for indicating small data, and second indication information for indicating the size of the small data; and The second indication information is carried in a first media access control unit MAC CE or a buffer status report BSR MAC CE; the first MAC CE is different from the BSR MAC CE.

29. The network device according to claim 28, wherein: The network device further includes: a second sending unit configured to send third indication information, where the third indication information is used to indicate whether the terminal device is allowed to use the PUSCH to transmit the small data.

30. The network device according to claim 28, wherein The network device further includes: The third sending unit is configured to send fourth indication information, where the fourth indication information is used to indicate a maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access.

31. The network device according to claim 28, wherein: The fourth receiving unit is configured to receive the small data indication information when the size of the small data is greater than the maximum transmission block size of the PUSCH in the first type of random access, the size of the small data is not greater than the maximum amount of data that can be transmitted when the small data indication information is transmitted based on the first type of random access, and the maximum transmission block size can accommodate the size of the small data indication information.

32. The network device according to claim 31, wherein: The fourth receiving unit is configured to receive only the small data indication information through the PUSCH; Alternatively, the small data indication information and the radio resource control message are received through the PUSCH.

33. The network device according to claim 31, wherein: The fourth receiving unit is configured to receive the small data indication information and part of the small data through the PUSCH.

34. The network device according to claim 33, wherein: The small data indication information is further used to indicate the remaining data size to be transmitted in the small data.

35. The network device according to claim 34, wherein: The network device further includes: The fourth sending unit is configured to send scheduling information, where the scheduling information is used to schedule the terminal device to transmit the remaining data to be transmitted.

36. The network device according to any one of claims 28 to 35, wherein: The first type of random access includes: 2-step random access.

37. A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein: When the processor is configured to run the computer program, the processor executes the steps of the data transmission method according to any one of claims 1 to 9.

38. A network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein: When the processor is configured to run the computer program, the processor executes the steps of the data transmission method according to any one of claims 10 to 18.

39. A storage medium storing an executable program, wherein when the executable program is executed by a processor, the data transmission method according to any one of claims 1 to 9 is implemented.

40. A storage medium storing an executable program, wherein when the executable program is executed by a processor, the data transmission method according to any one of claims 10 to 18 is implemented.

41. A computer program product comprising computer program instructions, wherein the computer program instructions enable a computer to execute the data transmission method according to any one of claims 1 to 9.

42. A computer program product comprising computer program instructions, wherein the computer program instructions enable a computer to execute the data transmission method according to any one of claims 10 to 18.

43. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method according to any one of claims 1 to 9.

44. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the data transmission method according to any one of claims 10 to 18.

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