SCell dormancy reliability improvement

Patent metadata

Field	Value
Publication number	US-12464465-B2
Application number	US-202017995378-A
Country	US
Kind code	B2
Filing date	Apr 8, 2020
Priority date	Apr 8, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

The exemplary embodiments relate to a computer readable storage medium, a user equipment, a method and an integrated circuit that perform operations. A user equipment (UE) enters into a first state including one of a non-dormant state or a dormant state with a secondary serving cell (SCell) of a network, the SCell being configured to provide either one of a non-dormant bandwidth part (BWP) as a secondary component carrier (SCC) in the non-dormant state or a dormant BWP as an SCC in the dormant state. The UE switches from the first state to a second state including the other one of the non-dormant state or the dormant state, the switch being based on network configuration, a dormancy timer, or a radio condition.

First claim

The invention claimed is:

1 . A non-transitory computer readable storage medium comprising a set of instructions, wherein the set of instructions when executed by a processor of a user equipment (UE) cause the processor to perform operations, comprising:
entering into a first state including one of a non-dormant state or a dormant state with a secondary serving cell (SCell) of a network, the SCell being configured to provide either one of a non-dormant bandwidth part (BWP) as a secondary component carrier (SCC) in the non-dormant state or a dormant BWP as an SCC in the dormant state; receiving an indication from the network that a downlink control information (DCI) repetition scheme for dormancy DCI corresponding to the SCell is to be used where a plurality of dormancy DCIs are sent to the network during a predetermined period; detecting a dormancy DCI during the predetermined period; and switching from the first state to a second state including the other one of the non-dormant state or the dormant state, the switch being based on the dormancy DCI.

2 . The non-transitory computer readable storage medium of claim 1 , wherein switching from the first state to the second state includes an explicit network configuration of a BWP identifier (ID) corresponding to the non-dormant BWP or the dormant BWP when the UE cannot detect a dormancy DCI sent by the network.

3 . The non-transitory computer readable storage medium of claim 1 , wherein switching from the first state to the second state includes an explicit network configuration of 1 bit indicating the state when the UE cannot detect a dormancy DCI sent by the network.

4 . The non-transitory computer readable storage medium of claim 1 , wherein switching from the first state to the second state includes an explicit network configuration linking the state with a discontinuous reception (DRX) onduration state at the UE, the operations further comprising:
entering the dormant state during a sleep onduration; and entering the non-dormant state during a wakeup onduration.

5 . The non-transitory computer readable storage medium of claim 1 , the operations further comprising:
indicating to the network a current BWP on which the UE is working when UE cannot detect a dormancy DCI sent by the network.

6 . The non-transitory computer readable storage medium of claim 1 , wherein a dormancy timer configured by the network includes a maximum dormant period, the operations further comprising:
starting the dormancy timer when entering the dormant state; and when the UE detects a dormancy DCI signal for switching to the non-dormant state, stopping the dormancy timer and switching to the non-dormant state.

7 . The non-transitory computer readable storage medium of claim 6 , the operations further comprising:
when the timer expires prior to the UE detecting a dormancy DCI signal for switching to the non-dormant state, switching to the non-dormant state.

8 . The non-transitory computer readable storage medium of claim 6 , the operations further comprising:
when the timer expires prior to the UE detecting a dormancy DCI signal for switching to the non-dormant state, monitoring the PDCCH for a scheduling DCI from the SCell.

9 . The non-transitory computer readable storage medium of claim 8 , the operations further comprising:
when the scheduling DCI is not received during a predetermined or configured period of PDCCH monitoring, restarting the timer and stopping PDCCH monitoring; and when the scheduling DCI is received during the predetermined period of PDCCH monitoring, switching to the non-dormant BWP.

10 . The non-transitory computer readable storage medium of claim 1 , the operations further comprising:
receiving a configuration from the network including at least one radio condition trigger relating to the radio condition on the SCell that, when detected by the UE, triggers entering into one of the dormant state or the non-dormant state, the at least one radio condition indicating either one of an acceptable radio quality condition or an unacceptable radio quality condition.

11 . The non-transitory computer readable storage medium of claim 10 , wherein the at least one radio condition comprises at least one of a layer 1 (L1) CSI condition, an L1 RSRP condition, a layer 3 (L3) RSRP/RSRQ condition, a beam condition or a listen before talk (LBT) condition.

12 . The non-transitory computer readable storage medium of claim 11 , the operations further comprising:
determining the unacceptable radio quality condition is present when any one of an L1 CSI measurement value fails to satisfy a first predetermined threshold condition, an L1 RSRP measurement value fails to satisfy a second predetermined threshold, an L3 RSRP/RSRQ measurement value fails to satisfy a third predetermined threshold, a beam failure is detected, or an LBT failure is detected.

13 . The non-transitory computer readable storage medium of claim 12 , the operations further comprising:
determining the acceptable radio quality condition is present when the L1 CSI measurement value satisfies the first predetermined threshold condition, the L1 RSRP measurement value satisfies the second predetermined threshold, or the L3 RSRP/RSRQ measurement value satisfies the third predetermined threshold.

14 . The non-transitory computer readable storage medium of claim 13 , the operations further comprising:
entering one of the states based on the determined acceptable or unacceptable radio quality condition.

15 . The non-transitory computer readable storage medium of claim 13 , the operations further comprising:
detecting a dormancy DCI; and entering one of the states based on the determined acceptable or unacceptable radio quality condition and the dormancy DCI detection.

16 . The non-transitory computer readable storage medium of claim 1 , wherein the non-dormant state includes a PDCCH monitoring functionality and the dormant state does not include the PDCCH monitoring functionality.

17 . The non-transitory computer readable storage medium of claim 16 , wherein the non-dormant state further includes a transmission of SRSs, a RACH, a PUSCH and a PDSCH functionality and the dormant state does not include the transmission of SRSs, the RACH, the PUSCH and the PDSCH functionality.

18 . The non-transitory computer readable storage medium of claim 17 , wherein both the non-dormant state and the dormant state includes a beam management, a CSI measurement and an automatic gain control (AGC) functionality.

19 . A user equipment (UE), comprising:
a transceiver configured to be served a secondary component carrier (SCC) by a secondary serving cell (SCell) configured to provide either one of a non-dormant bandwidth part (BWP) as the SCC in a non-dormant state or a dormant BWP as the SCC in a dormant state: a processor configured to enter into a first state including one of the dormant state or the non-dormant state, receive an indication from the network that a downlink control information (DCI) repetition scheme for dormancy DCI corresponding to the SCell is to be used where a plurality of dormancy DCIs are sent to the network during a predetermined period, detect a dormancy DCI during the predetermined period and switch from the first state to a second state including the other one of the non-dormant state or the dormant state, the switch being based on the dormancy DCI.

Assignees

• Apple Inc

Inventors

• Xu Fangli
• Zhang Dawei
• Hu Haijing
• Xing Longda
• Shikari Murtaza A
• Vangala Sarma V
• Gurumoorthy Sethuraman
• Lovlekar Srirang A
• Chen Yuqin
• Wu Zhibin

Classifications

• H04W52/0232

  according to average transmission signal activity · CPC title

• H04W72/23

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

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04L1/08

  by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} · CPC title

• Y02D30/70

  in wireless communication networks · CPC title