Method, device and computer storage medium of communication
Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A method of communication implemented by a terminal device comprises determining, based on characteristics of traffic associated with uplink data, whether the uplink data is to be transmitted in an inactive state of the terminal device; and in accordance with a determination that the uplink data is to be transmitted in the inactive state, resuming radio bearers for the transmission of the uplink data in the inactive state; and transmitting, based on the radio bearers, the uplink data to the network device while the terminal device is in the inactive state. The method of communication implemented by a network device comprises receiving the uplink data; and transmitting, to the terminal device, a response to the reception of the uplink data. In this way, control scheme for small data transmission is provided.
1 . A method of a terminal device, the method comprising:
receiving, from a network device, a Radio Resource Control (RRC) Release message comprising information indicating a Data Radio Bearer (DRB) configured for Small Data Transmission (SDT)
wherein the RRC Release message includes a suspend configuration;
determining to initiate a resume procedure for the SDT in an inactive state based on a condition that the DRB configured to SDT supports a transmission of a first uplink data in the inactive state;
determining, based on the suspend configuration, to suspend the DRB, a first signaling radio bearer (SRB), and a second SRB configured for the SDT;
performing the resume procedure for the DRB, the first SRB and the second SRB; and
transmitting, to the network device, the first uplink data in the inactive state, based on the DRB, the first SRB and the second SRB.
2 . The method of claim 1 , wherein the terminal device determines to initiate the procedure for the SDT further based on a condition that pending uplink data is mapped to radio bearers for the SDT.
3 . The method of claim 1 , further comprising:
receiving, from the network device, system information comprising information indicating the threshold.
4 . The method of claim 1 , further comprising:
determining whether configured grant information is configured for the SDT;
in accordance with a determination that the configured grant information is configured for the SDT, determining whether a time advance (TA) associated with the SDT is valid;
in accordance with a determination that the TA is valid, performing, based on the configured grant information, the resume procedure for the SDT; and
in accordance with a determination that the configured grant information is not configured or that the TA is not valid, performing, based on a random access procedure, the procedure for the SDT.
5 . The method of claim 1 , further comprising:
entering an idle state in response to reselecting from a first cell served by the base station to a second cell served by a second network device during the procedure for the SDT.
6 . The method of claim 1 , further comprising:
performing subsequent transmission based on configured grant or dynamic grant.
7 . A method of network device, the method comprising:
transmitting, to a terminal device, a Radio Resource Control (RRC) Release message comprising information indicating a Data Radio Bearer (DRB) configured for Small Data Transmission (SDT),
wherein the RRC Release message includes a suspend configuration,
wherein a resume procedure for the SDT in an inactive state is determined to be initiated based on a condition that the DRB configured to SDT supports a transmission of a first uplink data in the inactive state,
wherein the suspend configuration suspends the DRB, a first signaling radio bearer (SRB), and a second SRB configured for the SDT, and
wherein the resume procedure is performed for the DRB, the first SRB and the second SRB; and
receiving, from the terminal device, the first uplink data in the inactive state, based on the DRB, the first SRB and the second SRB.
8 . The method of claim 7 , wherein the resume procedure for the SDT is determined to be initiated based on a comparison between a size of the first uplink data for the SDT and a threshold.
9 . The method of claim 7 , further comprising:
transmitting, to the terminal device, system information comprising information indicating the threshold.
10 . The method of claim 7 , wherein the transmitting comprises:
in accordance with a determination that configured grant information is configured for the SDT, and that a time advance (TA) associated with the SDT is valid, performing, based on the configured grant information, the resume procedure for the SDT; and
in accordance with a determination that the configured grant information is not configured or that the TA is not valid, performing, based on a random access procedure, the resume procedure for the SDT.
11 . The method of claim 7 , wherein, in response to a reselection from a first cell served by the network device to a second cell served by a second network device during the procedure for the SDT, the terminal device enters an idle state.
12 . The method of claim 7 , further comprising:
receiving subsequent transmission based on configured grant or dynamic grant.
13 . The method of claim 7 , wherein subsequent transmission is performed based on configured grant or dynamic grant.
14 . The method of claim 7 , wherein the DRB, a first signaling radio bearer (SRB), and a second SRB configured for the SDT, are determined to be suspended;
wherein the DRB, the first SRB, and the second SRB are resumed, and
wherein the method further comprises receiving the pending uplink data that is transmitted by the terminal device while remaining in the inactive state, based on the DRB, the first SRB, and the second SRB.
15 . A terminal device comprising:
a memory storing instructions; and
a processor configured to execute the instructions to:
receive, from a network device, a Radio Resource Control (RRC) Release message comprising information indicating a Data Radio Bearer (DRB) configured for Small Data Transmission (SDT),
wherein the RRC Release message includes a suspend configuration;
determine to initiate a resume procedure for the SDT in an inactive state based on a condition that the DRB configured to SDT supports a transmission of a first uplink data in the inactive state;
determine, based on the suspend configuration, to suspend the DRB, a first signaling radio bearer (SRB), and a second SRB configured for the SDT;
perform the resume procedure for the DRB, the first SRB and the second SRB; and
transmit, to the network device, the first uplink data in the inactive state, based on the DRB, the first SRB and the second SRB.
16 . The terminal device of claim 15 , wherein the processor is further configured to execute the instructions to:
determine to initiate the procedure for the SDT further based on a condition that pending uplink data is mapped to radio bearers for the SDT.
17 . The terminal device of claim 15 , wherein the processor is further configured to execute the instructions to:
receive, from the network device, system information comprising information indicating the threshold.
18 . The terminal device of claim 15 , wherein the processor is further configured to execute the instructions to:
enter an idle state in response to reselecting from a first cell served by the network device to a second cell served by a second network device during the procedure for the SDT.