Uplink transmission timing for non-terrestrial networks
View Patent ↗Various examples and schemes pertaining to uplink (UL) transmission timing for non-terrestrial networking (NTN) are described. An apparatus receives, from a network, downlink control information (DCI) indicating an NTN offset for a scheduling delay. Accordingly, the apparatus performs one or more UL transmissions to a satellite with the scheduling delay which accounts for the NTN offset.
1. A method, comprising:
receiving, by a processor of an apparatus, a system information block (SIB) indicating a non-terrestrial networking (NTN) offset for a propagation delay; and
performing, by the processor, an uplink (UL) transmission to a satellite with consideration of the NTN offset,
wherein the performing comprises:
receiving a downlink control information (DCI) at a slot n; and
determining a plurality of physical uplink control channel (PUCCH) resources corresponding to a plurality of UL hybrid automatic repeat request (HARQ) acknowledgement (ACK) and negative acknowledgement (NACK) of a plurality of transport blocks (TBs) at a slot n + K 1 ′,
wherein K 1 ′ denotes the propagation delay,
wherein K 1 ′=K 1 +K 1 ntnOffset, wherein K 1 denotes a parameter of scheduling offset for HARQ ACK and NACK indicated in the DCI, and
wherein K 1 ntnOffset denotes the NTN offset indicated in the SIB.
2. The method of claim 1 , wherein the NTN offset pertains to one or more DL assignments or one or more UL grants.
3. The method of claim 1 , wherein K 1 is indicated in a physical downlink shared channel (PDSCH)-to-HARQ-timing indicator field in the DCI.
4. The method of claim 1 , wherein the performing further comprises:
determining a plurality of physical uplink shared channel (PUSCH) resources at a slot n +K 2 ′,
wherein K 2 ′ comprises the propagation delay.
5. The method of claim 4 , wherein K 2 ′=K 2 +K 2 _ntnOffset, wherein K 2 denotes a parameter of scheduling offset for a PUSCH indicated in the DCI, wherein K 2 is based on a numerology of the PUSCH, and wherein K 2 _ntnOffset denotes the NTN offset in the SIB.
6. The method of claim 1 , wherein:
the DCI indicates the propagation delay in slots as {└n·2{circumflex over ( )}(μ_PUSCH —μ_PDCCH) ┐+K 2 ′},
μ_PUSCH denotes a numerology of a physical uplink shared channel (PUSCH),
μ_PDCCH denotes a numerology of a physical downlink control channel (PDCCH), and
K 2 ′ denotes the propagation delay for UL data transmissions.
7. An apparatus, comprising:
a communication device configured to wirelessly communicate with a network and a satellite;
a processor coupled to the communication device and configured to perform operations comprising:
receiving, via the communication device, a system information block (SIB) indicating a non-terrestrial networking (NTN) offset for a propagation delay; and
performing, via the communication device, an uplink (UL) transmission to a satellite with consideration of the NTN offset,
wherein, in performing the UL transmission, the processor is configured to perform operations comprising:
receiving a downlink control information (DCI) at a slot n; and
determining a plurality of physical uplink control channel (PUCCH) resources corresponding to a plurality of UL hybrid automatic repeat request (HARQ) acknowledgement (ACK) and negative acknowledgement (NACK) of a plurality of transport blocks (TBs) at a slot n + K 1 ′,
wherein K 1 ′ denotes the propagation delay,
wherein K 1 ′=K 1 +K 1 ntnOffset, wherein K 1 denotes a parameter of scheduling offset for HARQ ACK and NACK indicated in the DCI, and
wherein K 1 ntnOffset denotes the NTN offset indicated in the SIB.
8. The apparatus of claim 7 , wherein the NTN offset pertains to one or more DL assignments or one or more UL grants.
9. The apparatus of claim 7 , wherein K 1 is indicated in a physical downlink shared channel (PDSCH)-to-HARQ-timing indicator field in the DCI.
10. The apparatus of claim 7 , wherein, in performing the UL transmission, the processor is further configured to perform operations comprising:
determining a plurality of physical uplink shared channel (PUSCH) resources at a slot n + K 2 ′,
wherein K 2 ′ denotes the propagation delay.
11. The apparatus of claim 10 , wherein K 2 ′=K 2 +K 2 _ntnOffset, wherein K 2 denotes a parameter of scheduling offset for a PUSCH indicated in the DCI, wherein K 2 is based on a numerology of the PUSCH, and wherein K 2 _ntnOffset denotes the NTN offset indicated in the SIB.
12. The apparatus of claim 7 , wherein
the DCI indicates the propagation delay in slots as {[n· 2 {circumflex over ( )}(μ_PUSCH—μ_PDCCH) ]+K 2 ′},
μ_PUSCH denotes a numerology of a physical uplink shared channel (PUSCH),
μ_PDCCH denotes a numerology of a physical downlink control channel (PDCCH), and
K 2 ′ denotes the propagation delay for UL data transmissions.