Methods, devices, and computer program products for wireless communications

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 relates generally to wireless communications, and more particularly to fifth generation (5G) or sixth generation (6G) wireless communications. [Background technology]

[0002] Some approaches use Mobile Originated-SDT (MO-SDT) procedures for small data transmission (SDT) for uplink (UL) packets. By allowing transmission of small, infrequent packets in the radio resource control (RRC) idle state, signaling overhead, user equipment (UE) power consumption, and data transmission latency can be reduced. Summary of the Invention [Means for solving the problem]

[0003] The present disclosure relates to methods, devices, and computer program products 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, from a wireless communication node, a paging message over a first MT-SDT resource or a second MT-SDT resource, the paging message instructing the wireless communication terminal to receive mobile terminated small data transmission (MT-SDT) data, and receiving, by the wireless communication terminal, from the wireless communication node, the MT-SDT data over 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 transmitting, by a wireless communications node, to a wireless communications terminal over a first MT-SDT resource or a second MT-SDT resource, a paging message instructing the wireless communications terminal to receive mobile terminated small data transmission (MT-SDT) data; and transmitting, by the wireless communications node, to the wireless communications terminal over the first MT-SDT resource or the second MT-SDT resource, the MT-SDT data.

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

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

[0008] Various embodiments may preferably implement the following features. Preferably, the first MT-SDT resource includes a pre-configured 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 that instructs the wireless communications terminal to receive MT-SDT data.

[0011] Preferably, the MT-SDT indicator includes an indication as to the 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 communications terminal receives an MT-SDT configuration for the first MT-SDT resource from the wireless communications node.

[0014] Preferably, the wireless communications terminal receives the MT-SDT configuration in 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 communications terminal transmits a second RRC message to the wireless communications node to confirm the MT-SDT configuration.

[0017] Preferably, the MT-SDT configuration comprises: frequency domain resource information; time domain resource information, A Configured Scheduling Radio Network Temporary Identifier (CS-RNTI), or Hybrid automatic repeat request (HARQ) information It includes at least one of the following:

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

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

[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 an offset of HARQ processes for SPS.

[0021] Preferably, the paging message includes an MT-SDT indicator that instructs the wireless communications terminal to receive MT-SDT data.

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

[0023] Preferably, the wireless communication terminal receives MT-SDT data on the 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, and SFN start time represents the system frame number of the start time, and slotstart time represents the slot of the start time.

[0024] Preferably, the wireless communications 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 starting symbol.

[0025] Preferably, the wireless communications 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 in the time domain, and S represents the starting symbol.

[0026] Preferably, the wireless communications terminal receives MT-SDT data on a physical downlink shared channel (PDSCH) in accordance with the MT-SDT configuration.

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

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

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

[0030] Preferably, the MT-SDT configuration instructs the wireless communications 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 communications 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 communications terminal initiates a two-step RACH procedure or a four-step RACH procedure based on the MT-SDT indication paging message.

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

[0034] Preferably, the wireless communications terminal decides to initiate 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 communications node transmits an MT-SDT configuration for the first MT-SDT resource to the wireless communications terminal.

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

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

[0038] Preferably, the wireless communication node transmits MT-SDT data on the physical downlink shared channel PDSCH in accordance with the transmitted MT-SDT configuration.

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

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

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

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

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

[0044] The exemplary embodiments disclosed herein are directed to providing features that will be readily apparent from reference to the following description in conjunction with the accompanying drawings. In accordance with various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those skilled in the art upon reading this disclosure that various modifications to the disclosed embodiments may be made while remaining within the scope of the present disclosure.

[0045] Thus, the present disclosure is not limited to the example embodiments and applications described and illustrated herein. Moreover, the specific order and / or hierarchy of steps in the methods disclosed herein is merely exemplary. Based on design preferences, the specific order or hierarchy of steps in a disclosed method or process may 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 operations in a sample order, and that the present disclosure is not limited to the specific order or hierarchy presented, unless otherwise stated.

[0046] These and other aspects and their implementations are described in more detail in the drawings, description, and claims. [Brief explanation of the drawings]

[0047] [Figure 1] 1 shows a schematic diagram of a wireless communication terminal according to one embodiment of the present disclosure. [Figure 2] 1 illustrates a schematic diagram of a wireless communication node (e.g., a wireless network node) according to one embodiment of the present disclosure. [Figure 3] 1 illustrates an exemplary MT-SDT procedure, according to one embodiment of the present disclosure. [Figure 4] 1 illustrates an example procedure for MT-SDT for a UE, according to one embodiment of the present disclosure. [Figure 5] 1 illustrates an example procedure for MT-SDT for a network according to one embodiment of the present disclosure. [Figure 6] 1 illustrates an example procedure for MT-SDT resource 1 according to one embodiment of the present disclosure. [Figure 7] 10 illustrates an example procedure for MT-SDT resource 2 according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0048] In some embodiments, a paging message may be used to transmit paging information to a UE in an RRC idle state or an RRC inactive state. The network may initiate a paging procedure by transmitting a paging message at a paging occasion of the UE. The network may use a paging message to transmit paging information to multiple UEs by including one paging record per UE in the paging message.

[0049] However, the Mobile Terminated SDT (MT-SDT) procedure is still unclear, specifically the MT-SDT mechanism for UEs in RRC inactive state that can support Random Access based SDT (RA-SDT) and Configured Grant SDT (CG-SDT) as UL responses, and the MT-SDT procedure for initial DL data reception and subsequent UL and / or DL ​​data transmission in RRC inactive state.

[0050] FIG. 1 is a schematic diagram of a wireless communication terminal 10 according to one embodiment of the present disclosure. The wireless terminal 10 may be, but is not limited to, a user equipment (UE), a mobile phone, a laptop, a tablet computer, an e-book, or a portable computer system. 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 that is 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 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.

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

[0052] The processor 100 may, for example, execute the program code 112 to perform any one of the steps in the illustrated embodiment on the wireless terminal 10 .

[0053] The communication unit 120 may be a transceiver. Alternatively or additionally, the communication unit 120 may combine a transmitting unit and a receiving unit configured to transmit and receive signals, respectively, to and from a wireless network node (e.g., a base station).

[0054] 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 one embodiment of the present disclosure. The wireless network node 20 may be, but is not limited to, 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). Additionally, wireless network node 20 may include (perform) 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), an application function (AF), etc. 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. Storage unit 210 may be any data storage device that stores program code 212 that is accessed and executed by processor 200.Examples of the storage unit 212 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. 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 storage unit 210 and the program code 212 may be omitted. The processor 200 may include a storage unit having the program code stored therein.

[0056] The processor 200 may, for example, execute the program code 212 to perform any of the steps described in the illustrated embodiment on the wireless network node 20 .

[0057] The communication unit 220 may be a transceiver. Alternatively or additionally, the communication unit 220 may combine a transmitting unit and a receiving unit configured to transmit and receive signals, respectively, to a wireless terminal (e.g., user equipment or another wireless network node).

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

[0059] Aspect 1: MT-SDT procedure In one embodiment, an exemplary procedure for MT-SDT is provided in accordance with an embodiment of the present disclosure illustrated in FIG.

[0060] In step S31, the network wants 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 MT-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 pre-configured downlink resource, and the pre-configured resource may be triggered by a paging message. In one embodiment, MT-SDT resource 2 is a random access resource, and MT-SDT data may be transmitted by MSGB, MSG4, or MSG2 in the random access procedure.

[0062] In step S32, after the paging message is sent to the UE, the network transmits MT-SDT data to the UE using a previously configured DL resource (e.g., a pre-configured downlink resource, or MSGB or MSG4 or MSG2 in the random access procedure described above). 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: MT-SDT procedure for UE In one embodiment, an exemplary procedure for MT-SDT for a UE is provided in accordance with an embodiment of the present disclosure illustrated in FIG.

[0064] In step S41, the UE receives a paging message with 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 a 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, where MT-SDT resource 1 is a pre-configured downlink resource, where the pre-configured resource may be triggered by a paging message, and MT-SDT resource 2 is a random access resource, where MT-SDT data may be transmitted by MSGB, or MSG4, or MSG2 in the random access procedure.

[0067] Aspect 3: MT-SDT Procedure for Networks In one embodiment, an exemplary procedure for network-directed MT-SDT is provided in accordance with an embodiment of the present disclosure illustrated in FIG.

[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 to the UE with an MD-SDT indicator to notify the UE to receive the MT-SDT data.

[0069] In one embodiment, the paging message is for informing the UE to receive MT-SDT data and includes at least one MD-SDT indicator indicating that the MD-SDT data may 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 particular 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 pre-configured downlink resource, and the pre-configured resource may be triggered by a paging message. In one embodiment, MT-SDT resource 2 is a random access resource, and MT-SDT data may be transmitted by MSGB, 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 in accordance with an embodiment of the present disclosure illustrated in FIG.

[0074] In step S61, the network sends an RRC message 1 to the UE to configure an MT-SDT resource (e.g., a DL MT-SDT resource). The 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 instructing the UE to receive MT-SDT data in downlink assignments occurring within a slot. In one embodiment, the MD-SDT configuration may include information instructing the UE to receive MT-SDT data within a specified BWP.

[0076] In one embodiment, the MT-SDT configuration includes: frequency domain resource information; time domain resource information, The configured Scheduling Radio Network Temporary Identifier (CS-RNTI), and / or Hybrid Automatic Repeat Request (HARQ) information It may include at least one of:

[0077] In one embodiment, the frequency domain resource information includes bandwidth portion (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 processes for SPS.

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

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

[0082] In step S63, the network desires to transmit MT-SDT data to the UE. The network may send a paging message to the UE to notify the UE to receive 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 is notifying the UE to receive MT-SDT data. The MT-SDT indicator may be a paging cause having a value of MT-SDT.

[0083] In step S64, the network transmits MT-SDT data to the UE in accordance with the MT-SDT configuration (e.g., in accordance with the MT-SDT resources). In one embodiment, the network transmits the MT-SDT data to the UE using the MT-SDT resources configured by RRC message 1 in step S61 (e.g., by the MT-SDT configuration). In one embodiment, the UE monitors the DL MT-SDT resources in accordance with the MT-SDT configuration in RRC message 1 to receive the MT-SDT data.

[0084] In step S65, the UE receives MT-SDT data according to the MT-SDT configuration. For example, the UE: receive MT-SDT data within one or more BWPs according to the MT-SDT configuration, or · Receive MT-SDT data on slots / frames / subframes / symbols (time domain sources) according to the MT-SDT configuration, or MT-SDT data is received on the 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, and SFN start time represents the system frame number of the start time, and slot start time represents the slot of the start time, and SFN start time and slot start time are the SFN and slot of the first transmission of the PDSCH (Physical Downlink Shared Channel), respectively, 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 in the time domain, and S represents the start symbol (e.g., the parameter startSymbol mentioned above), or · MT-SDT data can be received on the 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 starting symbol.

[0085] In one embodiment, an MT-SDT configuration may be configured for a serving cell per BWP. In one embodiment, an MT-SDT configuration may include information for one or more BWPs. In one embodiment, MT-SDT data may 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 parameters startSymbolAndLength or startSymbol. Alternatively, the timeDomainAllocation information may include the parameters startSlotAndLength or startSlot.

[0088] In one embodiment, the MT-SDT configuration may include a parameter timeDomainOffset that defines the offset of the time domain resources relative to the SFN in the time domain (eg, timeReferenceSFN).

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

[0090] In one embodiment, the MT-SDT configuration may include HARQ information for 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 an embodiment of the present disclosure illustrated in FIG.

[0092] In step S71, the network sends an MT-SDT configuration (e.g., a random access resource configuration) for MT-SDT resource 2 to the UE. In one embodiment, the MT-SDT configuration includes a random access resource configuration for 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] If a two-step RACH procedure is used, the network can transmit the MT-SDT data in message B (i.e., MSGB), or if a four-step RACH procedure is used, the network can transmit the MT-SDT data in message 4 (i.e., MSG4) or (i.e., MSG2).

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

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

[0096] The following examples are provided, but the disclosure is not limited thereto. In one embodiment, the paging message may include an MT-SDT indicator that indicates that the network will transmit MT-SDT data using a two-step RACH procedure or a four-step RACH procedure.

[0097] In one embodiment, if the UE receives a paging message with an MT-SDT indicator indicating a two-step RACH MT-SDT transmission, the UE may initiate a two-step RACH procedure and may receive MT-SDT data in message B.

[0098] In one embodiment, if the UE receives a paging message with an MT-SDT indicator indicating a four-step RACH MT-SDT transmission, the UE may initiate a four-step RACH procedure and may receive the 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 two-step RACH procedure or a four-step RACH procedure. Therefore, when the UE receives a paging message for MT-SDT transmission, the UE can initiate a two-step or four-step RACH procedure based on the random access resource configuration. Furthermore, the UE can initiate a two-step or four-step RACH procedure based on the MT-SDT indicator and the MT-SDT configuration.

[0100] In one embodiment, if the MT-SDT indicator indicates that the MT-SDT resource is based on a two-step RACH procedure, the UE may initiate a two-step RACH procedure and receive MT-SDT data on message B in the two-step RACH procedure.

[0101] In one embodiment, if the MT-SDT indicator indicates that the MT-SDT resource is based on a four-step RACH procedure, the UE may initiate a four-step RACH procedure to receive MT-SDT data on message 2 or message 4 in the four-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, a value of "CG-SDT" is used to indicate that the network can use MT-SDT resource 1 to transmit MT-SDT data to the UE.

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

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

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

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

[0108] In one embodiment, when a UE receives a paging message containing a paging cause with a value of "RA-SDT", the UE may initiate a random access procedure to receive MT-SDT data on the random access resource.

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

[0110] According to the system information and paging messages, the UE may initiate a two-step RACH procedure with the network and send message A to the network. The UE may then receive MT-SDT data in message B from the network.

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

[0112] According to the system information and paging message, the UE may initiate a four-step RACH procedure with the network and send Message 1 to the network. The UE may then receive Message 2 from the network and obtain uplink resources for Message 3. In response, the UE may send Message 3 to the network with an MT-SDT indication. The UE may then 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 paging message notifies the UE to receive MT-SDT data and that the MT-SDT data can be transmitted using the selected SDT resource.

[0114] According to one embodiment of the present disclosure, a UE can receive MT-SDT data according to a 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 select one of the MT-SDT configurations according to the paging message. The UE can then receive MT-SDT data according to the selected MT-SDT configuration.

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

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

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

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

[0119] In accordance with one embodiment of the present disclosure, a wireless communication method includes receiving, by a wireless communication terminal (e.g., a UE as described above), a paging message from a wireless communication node (e.g., a network as described above) instructing the wireless communication terminal to receive mobile terminated 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 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.

[0120] In one embodiment, the paging message includes an MT-SDT indicator that instructs the wireless communications terminal to receive MT-SDT data.

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

[0122] In one embodiment, the value for 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 communications terminal receives an MT-SDT configuration for a first MT-SDT resource from the wireless communications node.

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

[0125] In one embodiment, the MT-SDT configuration instructs the wireless communications 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 communications 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 communications terminal initiates 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 communications terminal receives system information including an MT-SDT configuration that configures a second MT-SDT resource.

[0129] In one embodiment, the wireless communications terminal decides to initiate a two-step or four-step RACH procedure based on the MT-SDT configuration in the system information.

[0130] In accordance with one embodiment of the present disclosure, a wireless communication method includes transmitting, by a wireless communications node, to a wireless communications terminal, a paging message over a first MT-SDT resource or a second MT-SDT resource, instructing the wireless communications terminal to receive mobile terminated small data transmission (MT-SDT data); and transmitting, by the wireless communications node, to the wireless communications terminal, the MT-SDT data over 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] While various embodiments of the present disclosure have been described above, it should be understood that they are presented by way of example only, and not by way of limitation. Similarly, various figures may depict example architectures or configurations provided to enable those skilled in the art to appreciate exemplary features and functionality of the present disclosure. However, those skilled in the art will understand that the present disclosure is not limited to the example architectures or configurations shown, but may be implemented using various alternative architectures and configurations. Moreover, 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. Thus, the breadth and scope of the present disclosure should not be limited by any of the example embodiments described above.

[0133] It is also understood that any reference to an element herein using a designation such as "first," "second," etc., generally does not limit the quantity or order of those elements. Rather, these designations may be used herein 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 imply that only two elements may be used or that the first element must precede the second element in any way.

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

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

[0136] To clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, units, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, software, or a combination of these techniques depends on the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in various ways for each particular application, and such implementation decisions do not cause a departure 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 illustrative logical blocks, units, devices, components, and circuits described herein can be implemented in or performed by an integrated circuit (IC), which may include 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 may further include an antenna and / or transceiver for communicating with various components within a network or device. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration for performing the functions described herein. If implemented in software, the functions may be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.

[0138] Computer-readable media includes both computer storage media and communication media, including any medium that can enable a computer program or code to be transferred from one place to another. Storage media 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 desired program code in the form of instructions or data structures and that can be accessed by a computer.

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

[0140] Additionally, 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 describes embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements, or domains may be used without detracting from the present disclosure. For example, functionality shown to be performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units do not refer to a strict logical or physical structure or organization, but merely to suitable means for providing the described functionality.

[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 may be applied to other implementations without departing from the scope of the claims. Thus, the present disclosure is not intended to be limited to the implementations shown herein but is to 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 communications terminal, from a wireless communications node, a paging message instructing the wireless communications terminal to receive mobile terminated small data transmission MT-SDT data over a second MT-SDT resource; receiving, by the wireless communication terminal, the MT-SDT data from the wireless communication node via the second MT-SDT resource; A wireless communication method comprising:

2. The first MT-SDT resource includes a pre-configured downlink resource. and / or The wireless communication method of claim 1 , wherein the second MT-SDT resource comprises a random access resource in a random access procedure.

3. 3. The wireless communication method of claim 1, wherein the paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive the MT-SDT data.

4. A wireless communication method as described in claim 3, wherein the MT-SDT indicator includes an indication regarding a paging cause having a value of MT-SDT.

5. transmitting, by the wireless communications node, a paging message to the wireless communications terminal over a second MT-SDT resource instructing said wireless communications terminal to receive mobile terminated small data transmission MT-SDT data; transmitting, by the wireless communication node, the MT-SDT data to the wireless communication terminal via the second MT-SDT resource; A wireless communication method comprising:

6. The method of claim 1, wherein the first MT-SDT resource comprises a pre-configured downlink resource. and / or The wireless communication method of claim 5 , wherein the second MT-SDT resource includes a random access resource in a random access procedure.

7. The wireless communication method of claim 5, wherein the paging message includes an MT-SDT indicator that instructs the wireless communication terminal to receive the MT-SDT data.

8. A wireless communication method as described in claim 7, wherein the MT-SDT indicator includes an indication regarding a paging cause having a value of MT-SDT.

9. A wireless communication terminal, A communication unit; a processor configured to receive, from a wireless communication node, a paging message instructing the wireless communication terminal to receive Mobile Terminated Small Data Transmission (MT-SDT) data over a second MT-SDT resource, and to receive, from the wireless communication node, the MT-SDT data over the second MT-SDT resource; A wireless communication terminal comprising:

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