Method and apparatus for autonomous changing for dormant bandwidth part in a wireless communication system
A method and apparatus for autonomous changing for dormant bandwidth part in a wireless communication system is provided. A wireless device configures a cell group including a certain cell on which a PUCCH is configured. A wireless device activates a dormant BWP of the certain cell to be an active BWP of the certain cell, wherein no PDCCH is configured on the dormant BWP. A wireless device switches the active BWP of the certain cell from the dormant BWP to another BWP upon triggering the scheduling request procedure, wherein at least one PDCCH is configured on the other BWP.
1 . A method, comprising,
configuring, by a wireless device, a dual connectivity with a master cell group and a secondary cell group, wherein the secondary cell group includes a certain cell on which an uplink control channel is configured, and wherein the certain cell is a primary cell of the secondary cell group;
activating, by the wireless device, a first bandwidth part of the certain cell to be an active bandwidth part of the certain cell, wherein no downlink control channel is configured on the first bandwidth part;
skipping, by the wireless device, monitoring downlink control channel on the certain cell, while the first bandwidth part of the certain cell is activated;
triggering, by the wireless device, scheduling request procedure corresponding to the secondary cell group;
determining, by the wireless device, that the secondary cell group is in a dormant state, based on that no downlink control channel is configured for each activated bandwidth part of all cells belonging to the secondary cell group, upon triggering the scheduling request procedure;
selecting, by the wireless device, a second bandwidth part of the certain cell on which at least one downlink control channel and the uplink control channel is configured;
performing, by the wireless device, autonomous bandwidth part switching of the active bandwidth part from the first bandwidth part to the second bandwidth part, by deactivating the first bandwidth part and activating the second bandwidth part, based on determining that the secondary cell group is in the dormant state;
transmitting, by the wireless device to a network, a scheduling request for the secondary cell group via the uplink control channel configured on the second bandwidth part of the certain cell after the autonomous switching;
monitoring, by the wireless device, the at least one downlink control channel configured for the second bandwidth part of the certain cell; and
acquiring, by the wireless device from the network, at least one uplink resource via the at least one downlink control channel configured on the second bandwidth part of the certain cell, in response to the scheduling request.
2 . The method of claim 1 , wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.
3 . A wireless device, comprising:
a transceiver;
a memory; and
at least one processor operatively coupled to the transceiver and the memory, and configured to perform operations, the operations comprising:
configuring a dual connectivity with a master cell group and a secondary cell group, wherein the secondary cell group includes a certain cell on which an uplink control channel is configured, and wherein the certain cell is a primary cell of the secondary cell group;
activating a first bandwidth part of the certain cell to be an active bandwidth part of the certain cell, wherein no downlink control channel is configured on the first bandwidth part;
skipping monitoring downlink control channel on the certain cell, while the first bandwidth part of the certain cell is activated;
triggering scheduling request procedure corresponding to the secondary cell group;
determining that the secondary cell group is in a dormant state, based on that no downlink control channel is configured for each activated bandwidth part of all cells belonging to the secondary cell group, upon triggering the scheduling request procedure;
selecting a second bandwidth part of the certain cell on which at least one downlink control channel and the uplink control channel is configured;
performing autonomous bandwidth part switching of the active bandwidth part from the first bandwidth part to the second bandwidth part, by deactivating the first bandwidth part and activating the second bandwidth part, based on determining that the secondary cell group is in the dormant state;
transmitting, from a network, a scheduling request for the secondary cell group via the uplink control channel configured on the second bandwidth part of the certain cell after the autonomous switching;
monitoring the at least one downlink control channel configured for the second bandwidth part of the certain cell; and
acquiring, from the network, at least one uplink resource via the at least one downlink control channel configured on the second bandwidth part of the certain cell, in response to the scheduling request.
4 . A non-transitory computer-readable medium having stored thereon a plurality of instructions, which, when executed by a processor of a wireless device, cause the wireless device to perform operations, the operations comprising:
configuring a dual connectivity with a master cell group and a secondary cell group, wherein the secondary cell group includes a certain cell on which an uplink control channel is configured, and wherein the certain cell is a primary cell of the secondary cell group;
activating a first bandwidth part of the certain cell to be an active bandwidth part of the certain cell, wherein no downlink control channel is configured on the first bandwidth part;
skipping monitoring downlink control channel on the certain cell, while the first bandwidth part of the certain cell is activated;
triggering scheduling request procedure corresponding to the secondary cell group;
determining that the secondary cell group is in a dormant state, based on that no downlink control channel is configured for each activated bandwidth part of all cells belonging to the secondary cell group, upon triggering the scheduling request procedure;
selecting a second bandwidth part of the certain cell on which at least one downlink control channel and the uplink control channel is configured;
performing autonomous bandwidth part switching of the active bandwidth part from the first bandwidth part to the second bandwidth part, by deactivating the first bandwidth part and activating the second bandwidth part, based on determining that the secondary cell group is in the dormant state;
transmitting, from a network, a scheduling request for the secondary cell group via the uplink control channel configured on the second bandwidth part of the certain cell after the autonomous switching;
monitoring the at least one downlink control channel configured for the second bandwidth part of the certain cell; and
acquiring, from the network, at least one uplink resource via the at least one downlink control channel configured on the second bandwidth part of the certain cell, in response to the scheduling request.