Methods and apparatus of a base station for subsequent transmission in inactive state in wireless communication

Patent metadata

Field	Value
Publication number	US-12446093-B2
Application number	US-202017598244-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	Sep 28, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A base station (BS) comprising a processor configured to perform operations is described. In an exemplary embodiment, the operations include receiving an initial data from a UE is in a RRC_INACTIVE while the UE does not transition from the RRC_INACTIVE state to a RRC_CONNECTED state. In addition, the operations include transmitting a physical downlink control channel (PDCCH) for a UE dedicated scheduling for a transmission or reception of a subsequent data during an active period, while the UE is in the RRC INACTIVE state. Furthermore, the operations include receiving or transmitting the subsequent data transmission based on the dedicated scheduling. The operations additionally include transmitting one or more configurations for the transmission or reception of the subsequent data. The one or more configurations is transmitted as part of the RRC release message. The one or more configurations is transmitted as part of a System Information Block (SIB).

First claim

What is claimed is:

1. A base station (BS) comprising memory and a processor configured to perform operations comprising:
receiving an initial data transmission from a user equipment (UE) when the UE is in an RRC_INACTIVE state without the UE transitioning to an RRC_CONNECTED state;
transmitting a physical downlink control channel (PDCCH) for a UE dedicated scheduling for a transmission or reception of a subsequent data during an active period, while the UE is in the RRC_INACTIVE state;
transmitting an indication of a measurement configuration associated with the UE in an RRC_INACTIVE state, the measurement configuration comprising at least a predetermined threshold of a radio quality that triggers a measurement event; and
receiving or transmitting the subsequent data using the transmitted PDCCH based on the UE dedicated scheduling.

2. The BS of claim 1 , wherein the processor is further configured to perform operations comprising:
transmitting one or more configurations for the transmission or reception of the subsequent data.

3. The BS of claim 2 , wherein the one or more configurations is transmitted as part of a radio resource control (RRC) release message.

4. The BS of claim 2 , wherein the one or more configurations is transmitted as part of a System Information Block (SIB).

5. The BS of claim 2 , wherein the processor is further configured to perform operations comprising:
transmitting a value for a timer for the active period, wherein the value for the timer is part of the one or more configurations, and wherein monitoring of the PDCCH for the transmission or reception of the subsequent data stops on expiration of the timer for the active period.

6. The BS of claim 1 , the processor is further configured to perform operations comprising:
transmitting a start indication of the active period from the base station after the initial data transmission, wherein a monitoring of the PDCCH for the transmission or reception of the subsequent data stops on reception of a stop indication of the active period at the UE.

7. The BS of claim 1 , wherein the processor configured to perform operations comprising:
transmitting a start indication of the active period to the UE after the initial data transmission, wherein the start indication comprises a value for a timer for the active period, and wherein monitoring of the PDCCH for the transmission or reception of the subsequent data stops on expiration of the timer for the active period.

8. The BS of claim 6 , wherein the start indication is a radio resource control (RRC) signaling, wherein the RRC signaling comprises one or more configurations for the transmission or reception of the subsequent data.

9. The BS of claim 1 , wherein the processor configured to perform operations comprising:
scrambling the PDCCH for the UE dedicated scheduling for the transmission or reception of the subsequent data during an active period based on a temporary cell radio network identifier (TC-RNTI) type, an inactive RNTI (I-RNTI) type, or a configured grant RNTI (CG-RNTI) type of an RNTI.

10. The BS of claim 1 , wherein the UE dedicated scheduling for the transmission or reception of the subsequent data during the active period is monitored according to a common search space.

11. The BS of claim 1 , wherein the processor is further configured to perform operations comprising:
transmitting, to the UE, a radio resource control (RRC) resume message triggering the UE to transition to a CONNECTED state, and
receiving, from the UE, an RRC resume complete message based on transmitting the RRC resume message.

12. The BS of claim 1 , wherein the processor is further configured to perform operations comprising:
transmitting, to the UE, a start indication of the active period for subsequent data transmission or reception after an initial data transmission; and
transmitting an indication of a measurement configuration comprising at least a predetermined threshold and associated with the UE in an RRC_INACTIVE state.

13. The BS of claim 1 , wherein the processor is further configured to perform operations comprising:
transmitting one or more configurations for the transmission or reception of the subsequent data, the one or more configurations comprising a suspend configuration to transition the UE to the RRC_INACTIVE state.

14. A method comprising:
receiving, by a base station, an initial data transmission from a user equipment (UE) when the UE is in an RRC_INACTIVE state without the UE transitioning to an RRC_CONNECTED state;
transmitting a physical downlink control channel (PDCCH) for a UE dedicated scheduling for a transmission or reception of a subsequent data during an active period, while the UE is in the RRC_INACTIVE state;
transmitting an indication of a measurement configuration associated with the UE in an RRC_INACTIVE state, the measurement configuration comprising at least a predetermined threshold of a radio quality that triggers a measurement event; and
receiving or transmitting the subsequent data using the transmitted PDCCH based on the UE dedicated scheduling.

15. The method of claim 14 , further comprising:
transmitting one or more configurations for the transmission or reception of the subsequent data.

16. The method of claim 15 , wherein the one or more configurations is transmitted as part of a radio resource control (RRC) release message.

17. The method of claim 14 , further comprising:
transmitting a start indication of the active period from the base station after the initial data transmission, wherein a monitoring of the PDCCH for the transmission or reception of the subsequent data stops on reception of a stop indication of the active period at the UE.

18. The method of claim 14 , further comprising:
transmitting a start indication of the active period to the UE after the initial data transmission, wherein the start indication comprises a value for a timer for the active period, and wherein monitoring of the PDCCH for the transmission or reception of the subsequent data stops on expiration of the timer for the active period.

19. The method of claim 14 , further comprising:
scrambling the PDCCH for the UE dedicated scheduling for the transmission or reception of the subsequent data during an active period based on a temporary cell radio network identifier (TC-RNTI) type, an inactive RNTI (I-RNTI) type, or a configured grant RNTI (CG-RNTI) type of an RNTI.

20. The method of claim 14 , further comprising:
transmitting, to the UE, a radio resource control (RRC) resume message triggering the UE to transition to a CONNECTED state, and
receiving, from the UE, an RRC resume complete message based on transmitting the RRC resume message.

Assignees

• Apple Inc

Inventors

• Yao Chunhai
• Zhang Dawei
• Xu Fangli
• Hu Haijing
• Shikari Murtaza A
• Vangala Sarma V
• Nimmala Srinivasan

Classifications

• H04W72/1263

  Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows · CPC title

• H04W72/23

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

• H04W76/30

  Connection release · CPC title

• H04W68/005

  Transmission of information for alerting of incoming communication · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title