Method, device, and computer program product for wireless communication

Abstract

A method, device, and computer program product for wireless communication are provided. The method includes receiving, by a wireless communication terminal, a paging message instructing the wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data from a wireless communication node via a first MT-SDT resource or a second MT-SDT resource, and receiving, by the wireless communication terminal, MT-SDT data from the wireless communication node via the first MT-SDT resource or the second MT-SDT resource.

Description

Technical Field

[0001] This document generally relates to wireless communication, and more particularly to fifth-generation (5G) or sixth-generation (6G) wireless communication.

Background Art

[0002] In some approaches, a Mobile Originated-Small Data Transmission (MO-SDT) procedure is used for small data transmission (SDT) of UL (uplink) packets. By enabling the transmission of small and infrequent packets in the RRC (Radio Resource Control) idle state, signaling overhead, UE (User Equipment) power consumption, and data transmission latency can be reduced.

Summary of the Invention

Means for Solving the Problems

[0003] The present disclosure relates to a method, a device, and a computer program product for mobile terminated small data transmission (MT-SDT).

[0004] One aspect of the present disclosure relates to a wireless communication method. In one embodiment, the wireless communication method includes receiving, by a wireless communication terminal, a paging message from a wireless communication node that instructs the wireless communication terminal to receive mobile terminated small data transmission (MT-SDT) data via a first MT-SDT resource or a second MT-SDT resource, and receiving, by the wireless communication terminal, MT-SDT data from the wireless communication node via the first MT-SDT resource or the second MT-SDT resource.

[0005] Another aspect of the present disclosure relates to a wireless communication method. In one embodiment, the wireless communication method includes a wireless communication node transmitting a paging message to instruct a wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data via a first MT-SDT resource or a second MT-SDT resource, and the wireless communication node transmitting MT-SDT data to the wireless communication terminal via the first MT-SDT resource or the second MT-SDT resource.

[0006] Another aspect of the present disclosure relates to a wireless communication terminal. In one embodiment, the wireless communication terminal includes a communication unit and a processor. The processor is configured to receive a paging message from a wireless communication node to instruct the wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data via a first MT-SDT resource or a second MT-SDT resource, and to receive MT-SDT data from the wireless communication node via the first MT-SDT resource or the second MT-SDT resource.

[0007] Another aspect of the present disclosure relates to a wireless communication node. In one embodiment, the wireless communication node includes a communication unit and a processor. The processor is configured to transmit a paging message to instruct a wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data via a first MT-SDT resource or a second MT-SDT resource, and to transmit MT-SDT data to the wireless communication terminal via the first MT-SDT resource or the second MT-SDT resource.

[0008] Various embodiments can preferably implement the following features. Preferably, the first MT-SDT resource includes a preconfigured downlink resource.

[0009] Preferably, the second MT-SDT resource includes a random access resource in a random access procedure.

[0010] Preferably, the paging message includes an MT-SDT indicator for instructing the wireless communication terminal to receive MT-SDT data.

[0011] Preferably, the MT-SDT indicator includes an indication regarding a paging cause having a value of MT-SDT.

[0012] Preferably, the value of MT-SDT includes a first value for using a first MT-SDT resource for MT-SDT, or a second value for using a second MT-SDT resource for MT-SDT.

[0013] Preferably, the wireless communication terminal receives an MT-SDT configuration for a first MT-SDT resource from a wireless communication node.

[0014] Preferably, the wireless communication terminal receives the MT-SDT configuration within a first RRC message.

[0015] Preferably, the first RRC message includes an RRC setup message, an RRC reconfiguration message, or an RRC release message.

[0016] Preferably, the wireless communication terminal transmits a second RRC message to the wireless communication node to confirm the MT-SDT configuration.

[0017] Preferably, the MT-SDT configuration is frequency domain resource information, time domain resource information, configured scheduling radio network temporary identifier (CS-RNTI), or Hybrid Automatic Repeat Request (HARQ) information includes at least one of them.

[0018] Preferably, the frequency domain resource information includes bandwidth part (BWP) information.

[0019] Preferably, the time domain resource information includes at least one of the offset of the time domain resource or the allocation of the time domain resource.

[0020] Preferably, the HARQ information includes at least one of the number of configured hybrid automatic repeat request HARQ processes for semi-persistent scheduling (SPS) or the offset of the HARQ process for SPS.

[0021] Preferably, the paging message includes an MT-SDT indicator for instructing the wireless communication terminal to receive MT-SDT data.

[0022] Preferably, the MT-SDT indicator includes an indication regarding the paging cause having the value of MT-SDT.

[0023] Preferably, the wireless communication terminal receives MT-SDT data on a slot, (numberOfSlotsPerFrame×SFN + slot number in the frame)= [numberOfSlotsPerFrame×SFN start time + slot start time modulo (1024×numberOfSlotsPerFrame) where numberOfSlotsPerFrame represents the number of slots per frame, SFN represents the system frame number, SFN start time represents the system frame number at the start time, and slotstart time represents the slot of the start time.

[0024] Preferably, the wireless communication terminal receives MT-SDT data on a symbol, [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (timeReferenceSFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot + timeDomainOffset × numberOfSymbolsPerSlot + S) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) where numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents the offset in the time domain, and S represents the start symbol.

[0025] Preferably, the wireless communication terminal receives MT-SDT data on a symbol, [(SFN × numberOfSlotsPerFrame) + (slot number in the frame × numberOfSymbolsPerSlot)] = (timeReferenceSFN × numberOfSlotsPerFrame + timeDomainOffset + S) modulo (1024 × numberOfSlotsPerFrame) where SFN represents the system frame number, numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents the offset within the time domain, and S represents the start symbol.

[0026] Preferably, the wireless communication terminal receives MT-SDT data on a physical downlink shared channel (PDSCH) according to the MT-SDT configuration.

[0027] Preferably, the wireless communication terminal receives MT-SDT data on the PDSCH from the wireless communication node without scheduling.

[0028] Preferably, the wireless communication terminal receives MT-SDT data in a radio resource control (RRC) inactive state or an RRC idle state.

[0029] Preferably, the wireless communication terminal receives an MT-SDT configuration for a second MT-SDT resource from the wireless communication node.

[0030] Preferably, the MT-SDT configuration instructs the wireless communication terminal to receive MT-SDT data via message MSGB in a two-step RACH procedure, or via message MSG2 or message MSG4 in a four-step RACH procedure.

[0031] Preferably, the paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive MT-SDT data via message MSGB in a two-step RACH procedure, or via message MSG2 or message MSG4 in a four-step RACH procedure.

[0032] Preferably, the wireless communication terminal starts a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT indication paging message.

[0033] Preferably, the wireless communication terminal receives system information including an MT-SDT configuration that configures a second MT-SDT resource.

[0034] Preferably, the wireless communication terminal determines to start a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT configuration in the system information.

[0035] Preferably, the wireless communication node transmits an MT-SDT configuration for a first MT-SDT resource to the wireless communication terminal.

[0036] Preferably, the wireless communication node receives the MT-SDT configuration in a first RRC message, and the first RRC message includes an RRC setup message, an RRC reconfiguration message, or an RRC release message.

[0037] Preferably, the wireless communication node receives a second RRC message from the wireless communication terminal to confirm the MT-SDT configuration.

[0038] Preferably, the wireless communication node transmits MT-SDT data on a physical downlink shared channel PDSCH according to the transmitted MT-SDT configuration.

[0039] Preferably, the wireless communication node transmits MT-SDT data on the PDSCH to the wireless communication terminal without scheduling.

[0040] Preferably, the wireless communication node transmits MT-SDT data to the wireless communication terminal when the wireless communication terminal is in a radio resource control RRC inactive state or an RRC idle state.

[0041] Preferably, the wireless communication node transmits an MT-SDT configuration for a second MT-SDT resource to the wireless communication terminal.

[0042] Preferably, the wireless communication node transmits system information including an MT-SDT configuration that configures a second MT-SDT resource to the wireless communication terminal.

[0043] The present disclosure also relates to a computer program product including computer-readable program media code stored thereon, the code causing a processor to perform a method for data transmission listed in any one of the foregoing methods when executed by the processor.

[0044] The exemplary embodiments disclosed herein are directed to providing features that will be readily apparent by reference to the following description in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it is understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those skilled in the art having read this disclosure that various modifications to the disclosed embodiments can be made within the scope of the present disclosure.

[0045] Accordingly, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Further, the particular order and / or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based on design preferences, the particular order or hierarchy of steps in the disclosed method or process can be rearranged while remaining within the scope of the present disclosure. Thus, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order and that the present disclosure is not limited to the particular order or hierarchy presented unless otherwise specified.

[0046] The above and other aspects and their implementations are described in more detail in the drawings, the description, and the claims.

Brief Description of the Drawings

[0047]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0048] In some embodiments, the paging message may be used to send paging information to a UE in the RRC idle state or RRC inactive state. The network can start the paging procedure by sending a paging message at the paging opportunity of the UE. The network can use the paging message to send paging information to multiple UEs by including one paging record for each UE in the paging message.

[0049] However, the procedure of Mobile Termination SDT (MT-SDT) is still unclear. Specifically, the MT-SDT mechanism for a UE in the RRC inactive state that can support random access based SDT (RA-SDT) and configured grant SDT (CG-SDT) as UL responses is still unclear, and the MT-SDT procedure for initial DL data reception and subsequent UL and / or DL data transmission in the RRC inactive state is also unclear.

[0050] FIG. 1 relates to a schematic diagram of a wireless communication terminal 10 according to an embodiment of the present disclosure. The wireless terminal 10 may be a user equipment (UE), a mobile phone, a laptop, a tablet computer, an e-book, or a portable computer system, and is not limited herein. The wireless terminal 10 may include a processor 100 such as a microprocessor or an application specific integrated circuit (ASIC), a storage unit 110, and a communication unit 120. The storage unit 110 may be any data storage device that stores program code 112 accessed and executed by the processor 100. Embodiments of the storage unit 112 include, but are not limited to, a subscriber identity module (SIM), a read-only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 120 may be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to the processing results of the processor 100. In one embodiment, the communication unit 120 transmits and receives signals via at least one antenna 122 shown in FIG. 1.

[0051] In one embodiment, the memory unit 110 and the program code 112 may be omitted, and the processor 100 may include a memory unit having the stored program code.

[0052] The processor 100 can perform any one of the steps in the embodiments illustrated on the wireless terminal 10, for example, by executing the program code 112.

[0053] The communication unit 120 may be a transceiver. Alternatively or additionally, the communication unit 120 may combine a transmission unit and a reception unit configured to transmit and receive signals, respectively, with a wireless network node (for example, a base station).

[0054] FIG. 2 relates to a schematic diagram of a wireless network node 20 (e.g., a wireless communication node, a network node, or a network) according to an embodiment of the present disclosure. The wireless network node 20 may be a satellite, a base station (BS), a smart node, a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN) node, a next generation RAN (NG-RAN) node, a gNB, an eNB, a gNB central unit (gNB-CU), a gNB distributed unit (gNB-DU), a data network, a core network, or a radio network controller (RNC), and is not limited herein. Additionally, the wireless network node 20 may include (execute) at least one network function such as an access and mobility management function (AMF), a session management function (SMF), a user place function (UPF), a policy control function (PCF), and an application function (AF). The wireless network node 20 may include a processor 200 such as a microprocessor or an ASIC, a storage unit 210, and a communication unit 220. The storage unit 210 may be any data storage device that stores program code 212 accessed and executed by the processor 200.Examples of the memory unit 212 include, but are not limited to, SIM, ROM, flash memory, RAM, hard disk, and optical data storage devices. The communication unit 220 may be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to the processing results of the processor 200. In one example, the communication unit 220 transmits and receives signals via at least one antenna 222 shown in FIG. 2.

[0055] In one embodiment, the memory unit 210 and the program code 212 may be omitted. The processor 200 may include a memory unit having stored program code.

[0056] The processor 200 can perform any of the steps described in the embodiments illustrated on the wireless network node 20, for example, by executing the program code 212.

[0057] The communication unit 220 may be a transceiver. The communication unit 220 may alternatively or additionally combine a transmission unit and a reception unit configured to transmit and receive signals respectively with a wireless terminal (e.g., a user device or another wireless network node).

[0058] In one embodiment, the wireless network node 20 can be the network described below.

[0059] Aspect 1: Procedure of MT-SDT In one embodiment, an exemplary procedure for MT-SDT is provided according to the embodiments of the present disclosure shown in FIG. 3.

[0060] In step S31, the network desires to send MT-SDT data to the UE. To do so, the network sends a paging message to the UE to notify the UE to receive the MT-SDT data according to the paging message. In one embodiment, the paging message is for notifying the UE to receive the MT-SDT data, and includes at least one MT-SDT indicator indicating that the MD-SDT data can be sent using the selected MT-SDT resource.

[0061] In one embodiment, the selected MT-SDT resource may be MT-SDT resource 1 (e.g., the first MT-SDT resource) or MT-SDT resource 2 (e.g., the second MT-SDT resource). In one embodiment, the MT-SDT indicator may be a paging cause having a specific value. For example, the value may indicate the selected MT-SDT resource 1 or MT-SDT resource 2. In one embodiment, MT-SDT resource 1 may be a preconfigured downlink resource, and the preconfigured resource may be triggered by a paging message. In one embodiment, MT-SDT resource 2 is a random access resource, and the MT-SDT data may be sent by MSGB, or MSG4, or MSG2 in a random access procedure.

[0062] In step S32, after the paging message is sent to the UE, the network uses a previously configured DL resource (e.g., a preconfigured downlink resource, or MSGB or MSG4 or MSG2 in the random access procedure described above) to send the MT-SDT data to the UE. In one embodiment, the UE receives the MT-SDT data on MT-SDT resource 1 or MT-SDT resource 2 according to the paging message. In one embodiment, the UE selects the MT-SDT resource according to the value of the paging cause in the paging message.

[0063] Aspect 2: Procedure of MT-SDT for UE In one embodiment, according to the embodiment of the present disclosure shown in FIG. 4, an exemplary procedure for MT-SDT for UE is provided.

[0064] In step S41, the UE receives a paging message having an MT-SDT indicator from the network. In one embodiment, the indicator triggers the UE to receive MT-SDT data from the network. In one embodiment, the indicator is the paging cause used for MT-SDT data transmission.

[0065] In step S42, the UE receives MT-SDT data on the selected MT-SDT resource. The UE selects the MT-SDT resource according to the value of the paging cause in the paging message.

[0066] In one embodiment, the MT-SDT resource includes at least two types of resources. MT-SDT resource 1 is a pre-configured downlink resource, and the pre-configured resource may be triggered by a paging message. MT-SDT resource 2 is a random access resource, and the MT-SDT data may be transmitted by MSGB, or MSG4, or MSG2 in the random access procedure.

[0067] Aspect 3: Procedure of MT-SDT for Network In one embodiment, according to the embodiment of the present disclosure shown in FIG. 5, an exemplary procedure for MT-SDT for the network is provided.

[0068] In step S51, when the network wants to send one or more MT-SDT data to the UE, the network sends a paging message having an MD-SDT indicator to the UE to notify the UE to receive the MT-SDT data.

[0069] In one embodiment, the paging message is for notifying the UE that the paging message is to receive MT-SDT data, and includes at least one MD-SDT indicator indicating that the MD-SDT data can be transmitted using the selected MT-SDT resource.

[0070] In one embodiment, the selected MT-SDT resource may be MT-SDT resource 1 or MT-SDT resource 2. In one embodiment, the MD-SDT indicator may be a paging cause having a specific value. For example, the value may indicate the selected MT-SDT resource 1 or MT-SDT resource 2.

[0071] In one embodiment, MT-SDT resource 1 may be a preconfigured downlink resource, and the preconfigured resource may be triggered by a paging message. In one embodiment, MT-SDT resource 2 is a random access resource, and the MT-SDT data may be transmitted by MSGB, or MSG4, or MSG2 in a random access procedure.

[0072] In step S52, the network transmits the MT-SDT data on the selected MT-SDT resource.

[0073] Aspect 4: Procedure for MT-SDT Resource 1 In one embodiment, an exemplary procedure for MT-SDT resource 1 is provided according to the embodiment of the present disclosure shown in FIG. 6.

[0074] In step S61, the network transmits RRC message 1 to the UE to configure an MT-SDT resource (for example, a DL MT-SDT resource). RRC message 1 may be an RRC setup message, an RRC reconfiguration message, or an RRC release message.

[0075] In one embodiment, RRC message 1 includes an MD-SDT configuration. In one embodiment, the UE can receive MT-SDT data according to the MD-SDT configuration. In one embodiment, the MD-SDT configuration may include information for instructing the UE to receive MT-SDT data in a downlink allocation occurring within a slot. In one embodiment, the MD-SDT configuration may include information for instructing the UE to receive MT-SDT within a specified BWP.

[0076] In one embodiment, the MT-SDT configuration may include frequency domain resource information, time domain resource information, configured scheduling radio network temporary identifier (CS-RNTI), and / or hybrid automatic repeat request (HARQ) information and may include at least one of them.

[0077] In one embodiment, the frequency domain resource information includes bandwidth part (BWP) information. In one embodiment, the resources for MT-SDT data include one or more BWPs.

[0078] In one embodiment, the CS-RNTI is configured for activation, deactivation, and retransmission.

[0079] In one embodiment, the HARQ information includes at least one of the number of configured HARQ processes for semi-persistent scheduling SPS and / or the offset of the HARQ process for SPS.

[0080] In one embodiment, the time domain resource information includes at least one of an offset of the time domain resource and / or an allocation of the time domain resource. In one embodiment, the offset of the time domain resource may be an offset of the resource with respect to the SFN (e.g., the timeReferenceSFN) in the time domain. In one embodiment, the allocation of the time domain resource may be an allocation of a configured uplink grant within the time domain including the startSymbolAndLength or startSymbol parameter.

[0081] In step S62 (which is an optional step), if the RRC message 1 is an RRC setup message or an RRC reconfiguration message, the UE sends an RRC message 2 to the network to confirm the MT-SDT configuration. In one embodiment, if the RRC message 1 is an RRC release message, step S62 may be omitted.

[0082] In step S63, the network desires to send MT-SDT data to the UE. The network can send a paging message to the UE to notify the UE to receive the MT-SDT data according to the MT-SDT configuration received in the RRC message 1 in step S61. The paging message includes an MT-SDT indicator indicating that the paging message notifies the UE to receive the MT-SDT data. The MT-SDT indicator may be a paging cause having a value of MT-SDT.

[0083] In step S64, the network sends the MT-SDT data to the UE according to the MT-SDT configuration (e.g., according to the MT-SDT resource). In one embodiment, the network uses the MT-SDT resource configured by the RRC message 1 in step S61 (e.g., by the MT-SDT configuration) to send the MT-SDT data to the UE. In one embodiment, the UE monitors the DL MT-SDT resource according to the MT-SDT configuration in the RRC message 1 and receives the MT-SDT data.

[0084] In operation S65, the UE receives MT-SDT data according to the MT-SDT configuration. For example, the UE · receives MT-SDT data within one or more BWPs according to the MT-SDT configuration, or · receives MT-SDT data on a slot / frame / subframe / symbol (time domain source) according to the MT-SDT configuration, or · receives MT-SDT data on a slot, or · (numberOfSlotsPerFrame×SFN + slot number in the frame) = [numberOfSlotsPerFrame×SFN start time + slot start time modulo (1024×numberOfSlotsPerFrame) where numberOfSlotsPerFrame represents the number of slots per frame, SFN represents the system frame number, SFN start time represents the system frame number of the start time, slot start time represents the slot of the start time, SFN start time and slot start time are, respectively, the SFN and slot of the first transmission of the PDSCH (Physical Downlink Shared Channel), and the configured downlink allocation is (re)initialized, or · [(SFN×numberOfSlotsPerFrame) + (slot number in the frame×numberOfSymbolsPerSlot)] = (timeReferenceSFN×numberOfSlotsPerFrame + timeDomainOffset + S) modulo (1024×numberOfSlotsPerFrame) where SFN represents the system frame number, numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents the offset within the time domain, and S represents the start symbol (e.g., the parameter startSymbol described above). or · be able to receive MT-SDT data on a symbol [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (timeReferenceSFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot + timeDomainOffset × numberOfSymbolsPerSlot + S) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) where numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents the offset within the time domain, and S represents the start symbol.

[0085] In one embodiment, the MT-SDT configuration may be configured for the serving cell per BWP. In one embodiment, the MT-SDT configuration may include information of one or more BWPs. In one embodiment, the MT-SDT data can be transmitted on one or more BWPs.

[0086] In one embodiment, the MT-SDT configuration may include timeDomainAllocation information, which defines the time domain resources of the MT-SDT resources.

[0087] In one embodiment, the timeDomainAllocation information may include the parameter startSymbolAndLength or startSymbol. Alternatively, the timeDomainAllocation information may include the parameter startSlotAndLength or startSlot.

[0088] In one embodiment, the MT-SDT configuration may include the parameter timeDomainOffset, which defines the offset of the time domain resources with respect to the SFN (e.g., timeReferenceSFN) within the time domain.

[0089] In one embodiment, the MT-SDT configuration may include an identifier that identifies the UE's MT-SDT transmission.

[0090] In one embodiment, the MT-SDT configuration may include HARQ information for the HARQ operation between the UE and the network.

[0091] Aspect 5: Procedure for MT-SDT Resource 2 In one embodiment, an exemplary procedure for MT-SDT Resource 2 is provided in accordance with the embodiment of the present disclosure shown in FIG. 7.

[0092] In operation S71, the network transmits to the UE an MT-SDT configuration (e.g., a random access resource configuration) for the MT-SDT resource 2. In one embodiment, the MT-SDT configuration includes a random access resource configuration for the MT-SDT resource 2 (i.e., the random access resource). The random access resource configuration may include an RA-SDT configuration. The RA-SDT configuration is used to transmit MT-SDT data from the network to the UE.

[0093] When the two-step RACH procedure is used, the network can transmit MT-SDT data within message B (i.e., MSGB). Alternatively, when the four-step RACH procedure is used, the network can transmit MT-SDT data within message 4 (i.e., MSG4) or (i.e., MSG2).

[0094] In operation S72, the network transmits a paging message to the UE to notify the UE of MT-SDT data transmission.

[0095] In operation S73, the UE starts a random access procedure and receives MT-SDT data within message B, message 2, or message 4.

[0096] Examples are provided below, but the present disclosure is not limited thereto. In one embodiment, the paging message may include an MT-SDT indicator indicating that the network uses a two-step RACH procedure or a four-step RACH procedure to transmit MT-SDT data.

[0097] In one embodiment, when the UE receives a paging message having an MT-SDT indicator indicating two-step RACH MT-SDT transmission, the UE can start a two-step RACH procedure and receive MT-SDT data within message B.

[0098] In one embodiment, when the UE receives a paging message having an MT-SDT indicator indicating 4-step RACH MT-SDT transmission, the UE can start a 4-step RACH procedure and can receive MT-SDT data in Message 4 or Message 2.

[0099] Furthermore, in the random access resource configuration of step S71, the MT-SDT configuration may include an MT-SDT indicator indicating that the MT-SDT resource is based on a 2-step RACH procedure or a 4-step RACH procedure. Therefore, when the UE receives a paging message for MT-SDT transmission, the UE can start a 2-step or 4-step RACH procedure based on the random access resource configuration. Furthermore, the UE can start a 2-step or 4-step RACH procedure based on the MT-SDT indicator and the MT-SDT configuration.

[0100] In one embodiment, when the MT-SDT indicator indicates that the MT-SDT resource is based on a 2-step RACH procedure, the UE can start a 2-step RACH procedure and receive MT-SDT data on Message B in the 2-step RACH procedure.

[0101] In one embodiment, when the MT-SDT indicator indicates that the MT-SDT resource is based on a 4-step RACH procedure, the UE can start a 4-step RACH procedure and receive MT-SDT data on Message 2 or Message 4 in the 4-step RACH procedure.

[0102] Aspect 6: Paging Message In one embodiment, there are several possible values for the paging cause in the paging message.

[0103] For example, the value of "CG-SDT" is used to indicate that the network can transmit MT-SDT data to the UE using MT-SDT resource 1.

[0104] In one embodiment, the MT-SDT resource 1 is the pre-configured downlink resource described above.

[0105] As another example, the value of "RA-SDT" is used to indicate that the network can send MT-SDT data to the UE using the MT-SDT resource 2.

[0106] In one embodiment, the MT-SDT resource 2 is the random access resource described above.

[0107] In one embodiment, when the UE receives a paging message including a paging cause with the value of "CG-SDT", the UE can monitor and receive MT-SDT data on the pre-configured resource.

[0108] In one embodiment, when the UE receives a paging message including a paging cause with the value of "RA-SDT", the UE can start a random access procedure and receive MT-SDT data on the random access resource.

[0109] Aspect 7: System Information In one embodiment, the UE can receive system information including an MT-SDT configuration having a RACH type with the value of "2-step RACH" from the network. In addition, a UE in the RRC inactive state can receive a paging message having a paging cause of "MT-SDT", "RA-SDT", or "CG-SDT".

[0110] According to the system information and the paging message, the UE can start a 2-step RACH procedure with the network and send Message A to the network. Then, the UE can receive MT-SDT data in Message B from the network.

[0111] In one embodiment, the UE can receive system information from the network that includes an MT-SDT configuration having a RACH type with a value of "4-step RACH". Additionally, a UE in the RRC inactive state can receive a paging message having a paging cause of "MT-SDT", "RA-SDT", or "CG-SDT".

[0112] According to the system information and the paging message, the UE can initiate a 4-step RACH procedure with the network and transmit Message 1 to the network. Thereafter, the UE can receive Message 2 from the network and obtain uplink resources for Message 3. Accordingly, the UE can transmit Message 3 to the network together with an MT-SDT indication. Thereafter, the UE can receive MT-SDT data in Message 4 from the network.

[0113] According to one embodiment of the present disclosure, the network can send a paging message to the UE to notify the UE to receive MT-SDT data according to the paging message. In one embodiment, the paging message includes at least one MT-SDT indicator indicating that the UE is notified to receive MT-SDT data and that the MT-SDT data can be transmitted using a selected SDT resource.

[0114] According to one embodiment of the present disclosure, the UE can receive MT-SDT data according to the paging message. In one embodiment, the UE can receive two MT-SDT configurations separately for MT-SDT resource 1 and MT-SDT resource 2 and can select one of the MT-SDT configurations according to the paging message. Then, the UE can receive MT-SDT data according to the selected MT-SDT configuration.

[0115] According to an embodiment of the present disclosure, when a UE receives a paging message, the UE can initiate a random access procedure with the network.

[0116] In one embodiment, the UE can select one of two or more types of random access procedures (e.g., 2-step RACH procedure, 4-step RACH procedure) according to the paging message and initiate the selected type of random access procedure.

[0117] In an alternative embodiment, the UE can select one of two or more types of random access procedures according to the random access resource configuration and initiate the selected type of random access procedure.

[0118] In an alternative embodiment, the UE can select one of two or more types of random access procedures according to the system information and initiate the selected type of random access procedure.

[0119] According to an embodiment of the present disclosure, a wireless communication method includes: a paging message received by a wireless communication terminal (e.g., the UE described above) from a wireless communication node (e.g., the network described above) instructing the wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data via a first MT-SDT resource (e.g., MT-SDT resource 1) or a second MT-SDT resource (e.g., MT-SDT resource 2); and the wireless communication terminal receiving MT-SDT data from the wireless communication node via the first MT-SDT resource or the second MT-SDT resource.

[0120] In one embodiment, the paging message includes an MT-SDT indicator for instructing the wireless communication terminal to receive MT-SDT data.

[0121] In one embodiment, the MT-SDT indicator includes an indication regarding a paging cause having a value of MT-SDT.

[0122] In one embodiment, the value of MT-SDT includes a first value for using a first MT-SDT resource for MT-SDT, or a second value for using a second MT-SDT resource for MT-SDT.

[0123] In one embodiment, the wireless communication terminal receives an MT-SDT configuration for a first MT-SDT resource from a wireless communication node.

[0124] In one embodiment, the wireless communication terminal receives an MT-SDT configuration for a second MT-SDT resource from a wireless communication node.

[0125] In one embodiment, the MT-SDT configuration instructs the wireless communication terminal to receive MT-SDT data via message MSGB in a two-step RACH procedure, or via message MSG2 or message MSG4 in a four-step RACH procedure.

[0126] In one embodiment, the paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive MT-SDT data via message MSGB in a two-step RACH procedure, or via message MSG2 or message MSG4 in a four-step RACH procedure.

[0127] In one embodiment, the wireless communication terminal starts a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT indication paging message.

[0128] In one embodiment, the wireless communication terminal receives system information including an MT-SDT configuration that configures a second MT-SDT resource.

[0129] In one embodiment, the wireless communication terminal determines the start of a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT configuration in the system information.

[0130] According to an embodiment of the present disclosure, a wireless communication method includes a paging message transmitted by a wireless communication node to instruct a wireless communication terminal to receive mobile terminal small data transmission MT-SDT data via a first MT-SDT resource or a second MT-SDT resource, and the wireless communication node transmitting MT-SDT data to the wireless communication terminal via the first MT-SDT resource or the second MT-SDT resource.

[0131] Details of these wireless communication methods can be confirmed by referring to the above embodiments.

[0132] Although various embodiments of the present disclosure have been described above, it should be understood that these are not limitations but are presented only as examples. Similarly, the various figures can depict an exemplary architecture or configuration provided to enable those skilled in the art to understand the exemplary features and functions of the present disclosure. However, those skilled in the art will understand that the present disclosure is not limited to the illustrated exemplary architecture or configuration and can be implemented using various alternative architectures and configurations. Furthermore, as will be understood by those skilled in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Therefore, the width and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

[0133] It should be understood that any reference in this specification to an element using terms such as "first", "second", etc. generally does not limit the quantity or order of those elements. Rather, these terms can be used in this specification as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not mean that only two elements can be used or that the first element must precede the second element in any way.

[0134] Furthermore, those skilled in the art will understand that any one of a variety of different technologies and techniques can be used to represent information and signals. For example, the data, instructions, commands, information, signals, bits, and symbols that can be referred to in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0135] Those skilled in the art will further understand that any one of the various exemplary logical blocks, units, processors, means, circuits, methods, and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of the two), firmware, various forms of programs or design codes incorporating instructions (which can be referred to herein, for convenience, as "software" or "software units"), or any combination of these techniques.

[0136] To clearly illustrate this compatibility of hardware, firmware, and software, various exemplary components, blocks, units, circuits, and steps have been generally described herein in terms of their functionality. Whether such functionality is implemented as hardware, as firmware, or as software, or as a combination of these techniques, depends on the particular application and design constraints imposed on the overall system. One of ordinary skill in the art can implement the described functionality in various ways for each particular application, but such implementation decisions do not depart from the scope of the present disclosure. According to various embodiments, a processor, device, component, circuit, structure, machine, unit, etc. can be configured to perform one or more of the functions described herein. The terms “configured to” or “configured for” as used herein with respect to a specified operation or function refer to a processor, device, component, circuit, structure, machine, unit, etc. that is physically constructed, programmed, and / or arranged to perform the specified operation or function.

[0137] Furthermore, those skilled in the art will understand that the various exemplary logical blocks, units, devices, components, and circuits described herein can be implemented in or executed by an integrated circuit (IC) that includes a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, units, and circuits can further include antennas and / or transceivers to communicate with various components within a network or within a device. The general-purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. The processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration for performing the functions described herein. When implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Accordingly, the steps of the method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.

[0138] A computer-readable medium includes both a computer storage medium and a communication medium including any medium that can be used to transfer a computer program or code from one location to another. The storage medium can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0139] As used herein, the term "unit" refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Further, for purposes of explanation, various units are described as separate units, but as will be apparent to those skilled in the art, two or more units may be combined to form a single unit for performing the associated functions according to embodiments of the present disclosure.

[0140] Furthermore, memory or other storage, as well as communication components, may be used in embodiments of the present disclosure. For clarity, it will be understood that the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functions between different functional units, processing logic elements, or domains may be used without detracting from the present disclosure. For example, functions shown to be performed by individual processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units are not intended to denote a strict logical or physical structure or organization, but rather are only references to suitable means for providing the described functions.

[0141] Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of the claims. Therefore, this disclosure is not limited to the implementations shown herein but should be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the following claims.

Claims

1. Receiving, by a wireless communication terminal, a paging message for instructing the wireless communication terminal to receive mobile terminal small data transmission (MT-SDT) data from a wireless communication node via a first MT-SDT resource or a second MT-SDT resource; Receiving, by the wireless communication terminal, the MT-SDT data from the wireless communication node via the first MT-SDT resource or the second MT-SDT resource; A wireless communication method comprising the above.

2. The wireless communication method according to claim 1, wherein the first MT-SDT resource includes preconfigured downlink resources.

3. The wireless communication method according to claim 1 or 2, wherein the second MT-SDT resource includes random access resources in a random access procedure.

4. The wireless communication method according to any one of claims 1 to 3, wherein the paging message includes an MT-SDT indicator for instructing the wireless communication terminal to receive the MT-SDT data.

5. The wireless communication method according to claim 4, wherein the MT-SDT indicator includes an instruction regarding a paging cause having a value of MT-SDT.

6. The wireless communication method according to claim 5, wherein the value of the MT-SDT includes a first value for using the first MT-SDT resource for the MT-SDT or a second value for using the second MT-SDT resource for the MT-SDT.

7. The wireless communication method according to any one of claims 1 to 6, wherein the wireless communication terminal receives an MT-SDT configuration for the first MT-SDT resource from the wireless communication node.

8. The wireless communication method according to claim 7, wherein the wireless communication terminal receives the MT-SDT configuration in a first radio resource control (RRC) message, and the RRC message is an RRC setup message, an RRC reconfiguration message, or an RRC release message.

9. The wireless communication method according to claim 7 or 8, wherein the wireless communication terminal transmits a second RRC message to the wireless communication node to confirm the MT-SDT configuration.

10. The MT-SDT configuration includes Frequency domain resource information, Time domain resource information, A configured scheduling radio network temporary identifier CS-RNTI, or hybrid automatic repeat request HARQ information The wireless communication method according to any one of claims 7 to 9, comprising at least one of them.

11. The frequency domain resource information includes bandwidth part BWP information, The time domain resource information includes at least one of an offset of the time domain resource or an allocation of the time domain resource, The HARQ information includes at least one of the number of configured hybrid automatic repeat request HARQ processes for semi-persistent scheduling SPS or an offset of the HARQ process for SPS. The wireless communication method according to claim 10.

12. The wireless communication terminal receives the MT-SDT data on a slot, (numberOfSlotsPerFrame×SFN+slot number in the frame)= [numberOfSlotsPerFrame×SFN start time +slot start time modulo(1024×numberOfSlotsPerFrame) [numberOfSlotsPerFrame × SFN start time + slot start time modulo (1024 × numberOfSlotsPerFrame) where numberOfSlotsPerFrame represents the number of slots per frame, SFN represents the system frame number, and SFN start time represents the system frame number at the start time, and slot start time represents the slot at the start time, the wireless communication method according to any one of claims 1 to 11.

13. The wireless communication terminal receives the MT-SDT data on a symbol, [(SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot]= (timeReferenceSFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+timeDomainOffset×numberOfSymbolsPerSlot+S)modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot) where numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents an offset in the time domain, and S represents the start symbol. The wireless communication method according to any one of claims 1 to 11.

14. The wireless communication terminal receives the MT-SDT data on a symbol, [(SFN × numberOfSlotsPerFrame) + (slot number in the frame × numberOfSymbolsPerSlot)] = (timeReferenceSFN × numberOfSlotsPerFrame + timeDomainOffset + S) modulo (1024 × numberOfSlotsPerFrame) (where SFN represents the system frame number, numberOfSlotsPerFrame represents the number of slots per frame, numberOfSymbolsPerSlot represents the number of symbols per slot, timeReferenceSFN represents the time reference system frame number, timeDomainOffset represents the offset in the time domain, and S represents the start symbol) The wireless communication method according to any one of claims 1 to 11.

15. The wireless communication method according to any one of claims 1 to 14, wherein the wireless communication terminal receives an MT-SDT configuration for the second MT-SDT resource from the wireless communication node.

16. The wireless communication method according to claim 15, wherein the MT-SDT configuration instructs the wireless communication terminal to receive the MT-SDT data via message MSGB in a two-step RACH procedure or via message MSG2 or message MSG4 in a four-step RACH procedure.

17. The wireless communication method according to claim 15, wherein the paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive the MT-SDT data via message MSGB in a two-step RACH procedure or via message MSG2 or message MSG4 in a four-step RACH procedure.

18. The wireless communication method according to any one of claims 1 to 17, wherein the wireless communication terminal starts a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT indication paging message.

19. The wireless communication method according to any one of claims 1 to 18, wherein the wireless communication terminal receives system information including an MT-SDT configuration that constitutes the second MT-SDT resource.

20. The wireless communication method according to any one of claims 1 to 19, wherein the wireless communication terminal determines the start of a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT configuration in the system information.

21. A paging message is transmitted by the wireless communication node to instruct the wireless communication terminal to receive mobile terminal small data transmission MT-SDT data via a first MT-SDT resource or a second MT-SDT resource. The wireless communication node transmits the MT-SDT data to the wireless communication terminal via the first MT-SDT resource or the second MT-SDT resource. A wireless communication method including the above.

22. The wireless communication method according to claim 21, wherein the first MT-SDT resource includes a preconfigured downlink resource.

23. The wireless communication method according to claim 21 or 22, wherein the second MT-SDT resource includes a random access resource in a random access procedure.

24. The wireless communication method according to any one of claims 21 to 23, wherein the paging message includes an MT-SDT indicator for instructing the wireless communication terminal to receive the MT-SDT data.

25. The wireless communication method according to claim 24, wherein the MT-SDT indicator includes an indication regarding a paging cause having a value of MT-SDT.

26. The wireless communication method according to claim 25, wherein the value of the MT-SDT includes a first value for using the first MT-SDT resource for the MT-SDT or a second value for using the second MT-SDT resource for the MT-SDT.

27. The wireless communication method according to any one of claims 21 to 26, wherein the wireless communication node transmits an MT-SDT configuration for the first MT-SDT resource to the wireless communication terminal.

28. The wireless communication method according to claim 27, wherein the wireless communication node transmits the MT-SDT configuration in a first RRC message, and the RRC message is an RRC setup message, an RRC reconfiguration message, or an RRC release message.

29. The wireless communication method according to claim 27 or 28, wherein the wireless communication node receives a second RRC message from the wireless communication terminal to confirm the MT-SDT configuration.

30. The MT-SDT configuration is frequency domain resource information, time domain resource information, configured scheduling radio network temporary identifier CS-RNTI, or hybrid automatic repeat request HARQ information The wireless communication method according to any one of claims 27 to 29, including at least one of them.

31. The frequency domain resource information includes bandwidth part BWP information, The time domain resource information includes at least one of an offset of the time domain resource or an allocation of the time domain resource, The HARQ information includes at least one of the number of configured hybrid automatic repeat request HARQ processes for semi-persistent scheduling SPS or the offset of the HARQ process for SPS. The wireless communication method according to claim 30.

32. The wireless communication method according to any one of claims 21 to 31, wherein the wireless communication node transmits an MT-SDT configuration for the second MT-SDT resource to the wireless communication terminal.

33. The MT-SDT configuration instructs the wireless communication terminal to receive the MT-SDT data via message MSGB in a two-step RACH procedure or via message MSG2 or message MSG4 in a four-step RACH procedure. The wireless communication method according to claim 32.

34. The paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive the MT-SDT data via message MSGB in a two-step RACH procedure or via message MSG2 or message MSG4 in a four-step RACH procedure. The wireless communication method according to claim 32.

35. The wireless communication method according to any one of claims 21 to 34, wherein the wireless communication node transmits system information including an MT-SDT configuration for configuring the second MT-SDT resource to the wireless communication terminal.

36. The wireless communication method according to claim 35, wherein the MT-SDT configuration instructs the wireless communication terminal to start a two-step RACH procedure or a four-step RACH procedure.

37. A wireless communication terminal, comprising a communication unit, a paging message is received from a wireless communication node, instructing the wireless communication terminal to receive mobile terminal small data transmission MT-SDT data via a first MT-SDT resource or a second MT-SDT resource, and from the wireless communication node, via the first MT-SDT resource or the second MT-SDT resource, a processor configured to receive the MT-SDT data A wireless communication terminal comprising.

38. The wireless communication terminal according to claim 37, wherein the processor is further configured to execute the wireless communication method according to any one of claims 2 to 20.

39. A wireless communication node, comprising a communication unit, a paging message is transmitted to a wireless communication terminal, instructing the wireless communication terminal to receive mobile terminal small data transmission MT-SDT data via a first MT-SDT resource or a second MT-SDT resource, and to the wireless communication terminal, via the first MT-SDT resource or the second MT-SDT resource, a processor configured to transmit the MT-SDT data A wireless communication node comprising.

40. The wireless communication node according to claim 39, wherein the processor is further configured to execute the wireless communication method according to any one of claims 22 to 36.

41. A computer program product including computer-readable program media code stored thereon, wherein when the code is executed by a processor, the processor is caused to perform the wireless communication method according to any one of claims 1 to 36.

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