Data transmission method and apparatus, communication device, and storage medium
A data transmission method performed by a terminal device includes: performing, in response to arrival of first data at the terminal device during a small data transmission (SDT) procedure, a target interaction with a network device, thereby causing the terminal device to enter a connected state; and transmitting, by the terminal device in the connected state, the first data; where the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data includes data not supporting transmission in the SDT procedure.
1 . A data transmission method, being applied to a terminal device and comprising:
performing, in response to arrival of first data at the terminal device during a small data transmission (SDT) procedure, a target interaction with a network device, thereby causing the terminal device to enter a connected state; and
transmitting, by the terminal device in the connected state, the first data;
wherein the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data comprises data not supporting transmission in the SDT procedure,
wherein performing the target interaction with the network device, thereby causing the terminal device to enter the connected state, comprises:
generating a first data arrival indication by a radio resource control (RRC) layer of the terminal device, wherein the first data arrival indication is used for notifying the network device that the first data arrives at the terminal device;
sending the first data arrival indication by performing uplink SDT on an uplink SDT resource, wherein the uplink SDT is uplink data transmission in the SDT procedure, and the uplink SDT resource comprises at least one of following resources: a configured grant (CG) uplink resource, and a dynamically scheduled uplink resource;
receiving a second message sent by the network device, wherein the second message comprises a connected state indication; and
entering the connected state based on the connected state indication.
2 . The method according to claim 1 , wherein,
the connected state indication comprises RRCResume or RRCSetup.
3 . The method according to claim 1 , wherein the SDT procedure corresponds to a first timer, and the method further comprises:
initiating the SDT procedure and starting the first timer.
4 . The method according to claim 1 , further comprising:
determining the arrival of the first data at the terminal device based on a connection resume indication, wherein the connection resume indication is an indication received by the RRC layer of the terminal device and delivered by a higher layer.
5 . The method according to claim 1 , wherein the SDT procedure corresponds to a first timer, and generating the first data arrival indication comprises:
determining a state of the first timer; and
generating the first data arrival indication in response to the first timer being in a running state.
6 . The method according to claim 1 , wherein,
a priority of the first data arrival indication is higher than a priority of user data carried on a dedicated transport channel (DTCH), the priority of the first data arrival indication is higher than a priority of user signaling carried on a dedicated control channel (DCCH), and the priority of the first data arrival indication is higher than or equal to a priority of a buffer state report (BSR) medium access control (MAC) control element (CE).
7 . The method according to claim 1 , wherein the SDT procedure comprises:
a CG-based SDT procedure; or,
a random access channel (RACH)-based SDT procedure.
8 . A terminal device, comprising:
a memory, configured to store at least one instruction, and
a processor, configured to execute the at least one instruction to cause the terminal device to:
perform, in response to arrival of first data at the terminal device during a small data transmission (SDT) procedure, a target interaction with a network device, thereby causing the terminal device to enter a connected state; and
transmit, by the terminal device in the connected state, the first data;
wherein the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data comprises data not supporting transmission in the SDT procedure,
wherein the terminal device is further caused to:
generate a first data arrival indication by a radio resource control (RRC) layer of the terminal device, wherein the first data arrival indication is used for notifying the network device that the first data arrives at the terminal device;
send the first data arrival indication by performing uplink SDT on an uplink SDT resource, wherein the uplink SDT is uplink data transmission in the SDT procedure, and the uplink SDT resource comprises at least one of following resources: a configured grant (CG) uplink resource, and a dynamically scheduled uplink resource;
receive a second message sent by the network device, wherein the second message comprises a connected state indication; and
enter the connected state based on the connected state indication.
9 . The terminal device according to claim 8 , wherein the SDT procedure corresponds to a first timer and the terminal device is further caused to:
determine a state of the first timer; and
generate the first data arrival indication in response to the first timer being in a running state.
10 . The terminal device according to claim 8 , wherein,
a priority of the first data arrival indication is higher than a priority of user data carried on a dedicated transport channel (DTCH), the priority of the first data arrival indication is higher than a priority of user signaling carried on a dedicated control channel (DCCH), and the priority of the first data arrival indication is higher than or equal to a priority of a buffer state report (BSR) medium access control (MAC) control element (CE).
11 . The terminal device according to claim 8 , wherein,
the connected state indication comprises RRCResume or RRCSetup.
12 . The terminal device according to claim 8 , wherein the SDT procedure corresponds to a first timer and the terminal device is further caused to;
initiate the SDT procedure and start the first timer.
13 . The terminal device according to claim 8 , wherein the terminal device is further caused to:
determine the arrival of the first data at the terminal device based on a connection resume indication, wherein the connection resume indication is an indication received by the RRC layer of the terminal device and delivered by a higher layer.
14 . The terminal device according to claim 8 , wherein the SDT procedure comprises:
a CG-based SDT procedure; or,
a random access channel (RACH)-based SDT procedure.
15 . A network device, comprising;
a memory, configured to store at least one instruction, and
a processor, configured to execute the at least one instruction to cause the network device to:
cause a terminal device to enter a connected state by performing a target interaction with the terminal device, wherein the target interaction is initiated by the terminal device in response to arrival of first data during a small data transmission (SDT) procedure; and
receive the first data transmitted by the terminal device in the connected state;
wherein the SDT procedure is a data transmission procedure of the terminal device in an inactive state, and the first data comprises data not supporting transmission in the SDT procedure,
wherein the network device is further caused to:
receive the first data arrival indication sent by the terminal device by performing uplink SDT on an uplink SDT resource, wherein the first data arrival indication is generated by a radio resource control (RRC) layer of the terminal device and used for notifying the network device that the first data arrives at the terminal device, the uplink SDT is uplink data transmission in the SDT procedure, and the uplink SDT resource comprises at least one of following resources: a configured grant (CG) uplink resource, and a dynamically scheduled uplink resource; and
send a second message to the terminal device, wherein the second message comprises a connected state indication, and the connected state indication is used for indicating the terminal device to enter the connected state.
16 . The network device according to claim 15 , wherein the SDT procedure corresponds to a first timer, and
the first data arrival indication is generated by the terminal device in response to the first timer being in a running state.
17 . The network device according to claim 15 , wherein,
a priority of the first data arrival indication is higher than a priority of user data carried on a dedicated transport channel (DTCH), the priority of the first data arrival indication is higher than a priority of user signaling carried on a dedicated control channel (DCCH), and the priority of the first data arrival indication is higher than or equal to a priority of a buffer state report (BSR) medium access control (MAC) control element (CE).
18 . The network device according to claim 15 , wherein,
the connected state indication comprises RRCResume or RRCSetup.
19 . The network device according to claim 15 , wherein,
the arrival of the first data at the terminal device is determined based on a connection resume indication, wherein the connection resume indication is an indication received by the RRC layer of the terminal device and delivered by a higher layer.
20 . The network device according to claim 15 , wherein the SDT procedure comprises:
a CG-based SDT procedure; or,
a random access channel (RACH)-based SDT procedure.