Granted Patent B2

US 12,726,554 · App. 18/570,599 · Granted Sep 1, 2026

Inventor: Sunghoon Jung (Seoul, KR)

Assignee: LG Electronics Inc.

H04L69/28H04W74/0833H04W74/0836H04W74/0838

Abstract

Claims (51)

1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a network, a configuration of a first random access resource for a contention-based random access to a cell group;

receiving, from the network, a configuration of a second random access resource for a contention-free random access to the cell group and validity information comprising a timer value related to a validity of the second random access resource;

entering a first state for the cell group;

starting a timer having a duration of the timer value after entering the first state for the cell group;

selecting a random access resource for use in entering a second state for the cell group; and

performing a random access procedure for the cell group based on the selected random access resource,

wherein the first random access resource is selected while the timer is not running,

wherein the second random access resource is selected while the timer is running,

wherein the first state is a state in which the UE monitors a first set of resources for a control channel on the cell group or does not monitor a control channel on the cell group, and

wherein the second state is a state in which the UE monitors a second set of resources for a control channel on the cell group.

2 . The method of claim 1 , wherein the starting of the timer comprises starting the timer upon entering the first state for the cell group.

3 . The method of claim 1 , wherein the starting of the timer comprises starting the timer upon receiving the configuration of the second random access resource for contention-free random access to the cell group.

4 . The method of claim 1 , wherein the starting of the timer comprises starting the timer upon receiving the validity information.

5 . The method of claim 1 , wherein the starting of the timer comprises starting the timer upon receiving an instruction from the network.

6 . The method of claim 1 , wherein the selecting of the random access resource comprises selecting the random access resource for use in entering the second state for the cell group based on identifying data available for transmission to the cell group while in the first state.

7 . The method of claim 1 , wherein the entering the first state for the cell group comprises entering the first state for the cell group upon receiving a command from the network.

8 . The method of claim 1 , wherein the entering the first state for the cell group comprises entering the first state for the cell group based on data being not communicated with the cell group for a predetermined or configured time duration.

9 . The method of claim 1 , wherein the second random access resource for contention-free random access to the cell group is released upon an expiry of the timer.

10 . The method of claim 1 , wherein the first state comprises a deactivated state, and the second state comprises an activated state,

wherein the cell group comprises a secondary cell group (SCG) including a primary secondary cell (PSCell), and

wherein the performing of the random access procedure for the cell group comprises performing the random access procedure towards the PSCell.

11 . The method of claim 1 , wherein the first set of resources and the second set of resources comprise at least one of a control resource set (CORESET), or a physical downlink control channel (PDCCH).

12 . The method of claim 1 , wherein the first set of resources may comprise sparser resources than the second set of resources.

13 . The method of claim 1 , wherein the UE is in communication with at least one of a mobile device, a network, or autonomous vehicles other than the UE.

14 . A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:

at least one transceiver;

at least processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

receiving, from a network, a configuration of a first random access resource for a contention-based random access to a cell group;

receiving, from the network, a configuration of a second random access resource for a contention-free random access to the cell group and validity information comprising a timer value related to a validity of the second random access resource;

entering a first state for the cell group;

starting a timer having a duration of the timer value after entering the first state for the cell group;

selecting a random access resource for use in entering a second state for the cell group; and

performing a random access procedure for the cell group based on the selected random access resource,

wherein the first random access resource is selected while the timer is not running,

wherein the second random access resource is selected while the timer is running,

wherein the first state is a state in which the UE monitors a first set of resources for a control channel on the cell group or does not monitor a control channel on the cell group, and

wherein the second state is a state in which the UE monitors a second set of resources for a control channel on the cell group.

15 . A network node related to a cell group configured to operate in a wireless communication system, the network node comprising:

at least one transceiver;

at least processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

transmitting a configuration of a first random access resource for a contention-based random access to the cell group;

transmitting a configuration of a second random access resource for a contention-free random access to the cell group and validity information comprising a timer value related to a validity of the second random access resource, wherein a timer having a duration of the timer value is started after entering a first state for the cell group;

performing a random access procedure for the cell group based on a random access resource selected among the first random access resource and the second random access resource; and

entering a second state for the cell group upon successfully completing the random access procedure for the cell group,

wherein the first random access resource is selected while the timer is not running,

wherein the second random access resource is selected while the timer is running,

wherein the first state is a state in which a user equipment (UE) monitors a first set of resources for a control channel on the cell group or does not monitor a control channel on the cell group, and

wherein the second state is a state in which the UE monitors a second set of resources for a control channel on the cell group.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)