Systems and methods for data transmission in an inactive state

Patent metadata

Field	Value
Publication number	US-11832274-B2
Application number	US-202217668765-A
Country	US
Kind code	B2
Filing date	Feb 10, 2022
Priority date	Oct 25, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Control signaling mechanisms are provided to support data transmissions to or from a user equipment (UE) in an inactive state. In some embodiments, a UE in an inactive state receives DCI including: a cyclic redundancy check (CRC) scrambled by a radio network temporary identifier (RNTI) that is specific to a group of UEs, the group of UEs including the UE; and a resource assignment for a data transmission to the UE. The data transmission is then received on a physical shared channel. In further embodiments, a UE in an inactive state receives DCI including: a CRC scrambled by a paging RNTI; and a resource assignment for a paging message to the UE. A data transmission is received by the UE in the paging message or in a further transmission that is scheduled by the paging message.

First claim

What is claimed is:

1. A method comprising:
receiving, by a user equipment (UE) in an inactive state, downlink control information (DCI) comprising:
a cyclic redundancy check (CRC) scrambled by a radio network temporary identifier (RNTI) that is specific to a group of UEs, the group of UEs including the UE, and
a resource assignment for a data transmission to the UE;
wherein the resource assignment indicates that a unicast or multicast data transmission is scheduled; and

receiving, by the UE in the inactive state, the data transmission on a physical shared channel.

2. The method of claim 1 , wherein the DCI further comprises a short message.

3. The method of claim 1 , wherein the DCI further comprises an indication of a hybrid automatic repeat request (HARQ) process associated with the data transmission.

4. The method of claim 1 , wherein the DCI further comprises a measurement request.

5. The method of claim 1 , wherein the RNTI is a first RNTI, the method further comprising:
receiving, by the UE in the inactive state, further DCI comprising a further CRC scrambled by a paging RNTI different from the first RNTI,
wherein the DCI is size-matched with the further DCI.

6. The method of claim 1 , wherein the RNTI is specific to the inactive state.

7. The method of claim 1 , wherein the RNTI is specific to the UE.

8. The method of claim 7 , wherein the RNTI is based on another identifier that is specific to the UE.

9. The method of claim 1 , wherein the physical shared channel is a physical downlink shared channel or a physical sidelink shared channel.

10. The method of claim 1 , wherein the resource assignment comprises at least one of: a frequency domain resource assignment, a time domain resource assignment, a virtual resource block to physical resource bock mapping, a modulation and coding scheme, and a transport block scaling factor.

11. A user equipment (UE) comprising:
a processor to configure the UE in an inactive state; and
a receiver to receive downlink control information (DCI) while the UE is in the inactive state and to receive a data transmission on a physical shared channel while the UE is in the inactive state, the DCI comprising:
a cyclic redundancy check (CRC) scrambled by a radio network temporary identifier (RNTI) that is specific to a group of UEs, the group of UEs including the UE; and
a resource assignment for the data transmission;
wherein the resource assignment indicates that a unicast or multicast data transmission is scheduled.

12. The UE of claim 11 , wherein the DCI further comprises a short message.

13. The UE of claim 11 , wherein the DCI further comprises an indication of a hybrid automatic repeat request (HARQ) process associated with the data transmission.

14. The UE of claim 11 , wherein the DCI further comprises a measurement request.

15. The UE of claim 11 , wherein the RNTI is a first RNTI, wherein the receiver is further configured to:
receive further DCI comprising a further CRC scrambled by a paging RNTI different from the first RNTI,
wherein the DCI is size-matched with the further DCI.

16. The UE of claim 11 , wherein the RNTI is specific to the inactive state.

17. The UE of claim 11 , wherein the RNTI is specific to the UE.

18. The UE of claim 17 , wherein the RNTI is based on another identifier that is specific to the UE.

19. The UE of claim 11 , wherein the physical shared channel is a physical downlink shared channel or a physical sidelink shared channel.

20. The UE of claim 11 , wherein the resource assignment comprises at least one of: a frequency domain resource assignment, a time domain resource assignment, a virtual resource block to physical resource bock mapping, a modulation and coding scheme, and a transport block scaling factor.

Assignees

• Abdoli Javad
• Herath Sanjeewa
• Huawei Tech Co Ltd

Inventors

• Abdoli Javad
• Herath Sanjeewa

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H03M13/09

  Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04W72/1273

  of downlink data flows · CPC title

• H04L1/1896 Primary

  ARQ related signaling · CPC title