Methods, terminal device and network node for uplink transmission
Methods, a terminal device and a network node for uplink transmission, in which the terminal device transmits a transport block (TB) to a network node with a first configured grant. The terminal device retransmits the TB to the network node autonomously with a second configured grant.
1 . A method in a terminal device comprising:
transmitting a transport block (TB) to a network node with a first configured grant, having a first configuration associated with configured grants, wherein a configuredGrantTimer is used with the transmitting the TB to the network node; and
retransmitting autonomously the TB to the network node with a second configured grant having the first configuration associated with the configured grants, wherein the retransmitting autonomously the TB to the network node reuses the configuredGrantTimer, whose timer value equals a predetermined maximum time period, and wherein an expiration of the predetermined maximum time period causes the terminal device to stop retransmitting autonomously the TB to the network node.
2 . The method according to claim 1 further comprising retransmitting autonomously the TB to the network node with a third configured grant having a second configuration associated with the configured grants.
3 . The method according to claim 1 further comprising retransmitting autonomously the TB to the network node with a third configured grant having the first configuration associated with the configured grants.
4 . The method according to claim 1 , wherein the TB is transmitted with a hybrid automatic repeat request (HARQ) process.
5 . The method according to claim 1 , wherein the retransmitting autonomously of the TB is performed one or more times with a same hybrid automatic repeat request (HARQ) process.
6 . The method according to claim 1 , wherein the configuredGrantTimer is started at a time point related to the transmitting the TB.
7 . The method according to claim 1 , wherein the configuredGrantTimer is stopped when the terminal device receives an acknowledgement for reception of the TB.
8 . The method according to claim 1 , wherein the retransmitting autonomously the TB with the second configured grant is performed when the terminal device determines that an autonomous retransmission with the second configured grant is allowed.
9 . The method according to claim 1 , wherein the configuredGrantTimer is stopped when the terminal device receives a dynamic grant for retransmission of the TB.
10 . The method according to claim 9 , wherein the configuredGrantTimer is started when one of following events occurs:
a media access control (MAC) protocol data unit (PDU) corresponding to the TB has been generated;
a first listen before talk (LBT) operation is started for a first transmission attempt of the TB; and
a first potential transmission opportunity for the TB occurs.
11 . The method according to claim 1 , further comprising:
indicating, to the network node, a number of transmission attempts for the TB or delay experienced for transmission of the TB.
12 . The method according to claim 11 , wherein the number of the transmission attempts or the delay experienced is indicated by one or more of:
redundant version of the TB;
uplink control information (UCI);
radio resource control (RRC) signaling;
MAC control element (CE); and
Layer 1 or Layer 2 signaling.
13 . The method according to claim 11 , further comprising:
receiving a signaling indicating termination of retransmissions for the TB.
14 . A terminal device comprising:
at least one processor; and
at least one memory, the at least one memory containing instructions which, when executed by the at least one processor, cause the terminal device to:
transmit a transport block (TB) to a network node with a first configured grant having a first configuration associated with configured grants, wherein a configuredGrantTimer is used with the transmit of the TB to the network node; and
retransmit autonomously the TB to the network node with a second configured grant having the first configuration associated with the configured grants, wherein the retransmit autonomously the TB to the network node reuses the configuredGrantTimer, whose timer value equals a predetermined maximum time period, and wherein an expiration of the predetermined maximum time period causes the terminal device to stop retransmitting autonomously the TB to the network node.
15 . A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause a terminal device to perform operations comprising:
transmitting a transport block (TB) to a network node with a first configured grant having a first configuration associated with configured grants, wherein a configuredGrantTimer is used with the transmitting the TB to the network node; and
retransmitting autonomously the TB to the network node with a second configured grant having the first configuration associated with the configured grants, wherein the retransmitting autonomously the TB to the network node reuses the configuredGrantTimer, whose timer value equals a predetermined maximum time period, and wherein an expiration of the predetermined maximum time period causes the terminal device to stop retransmitting autonomously the TB to the network node.