DEVICES, SYSTEMS AND METHODS FOR POWER EFFICIENT BEAM MANAGEMENT IN WIRELESS SYSTEMS
Embodiments include systems, apparatuses, and methods to enable coupling between a power states and a beam management states. A method is provided for jointly performing beam management and power management in a wireless transmit/receive in unit (WTRU), where the WTRU is configured to operate according to a plurality of power states and a plurality of beam management states that are linked to the plurality of power states such that each power state corresponds to a different beam management state. The method includes detecting a trigger condition; transitioning the WTRU between a first power state to a second power state based on the detected trigger condition; and transitioning the WTRU between a first beam management state to a second beam management state responsive to the transition to the second power state to which the second beam management state is linked.
1 . A method for jointly performing beam management and power management in a wireless transmit/receive unit (WTRU), the method comprising:
detecting a trigger condition;
transitioning the WTRU between a first power state to a second power state based on the detected trigger condition, wherein a plurality of power states, including the first power state and the second power state, are linked to a plurality of beam management states such that each power state corresponds to a different beam management state; and
transitioning the WTRU between a first beam management state to a second beam management state responsive to the transition to the second power state to which the second beam management state is linked.
2 . The method of claim 1 , wherein the plurality of power states includes at least two of: a long discontinuous reception (DRX) state, a short DRX state, an active low data throughput state, or an active high data throughput state.
3 . The method of claim 1 , wherein the plurality of power states are different from each other in at least one of a level of L1 and L2 processing, and a radio frequency (RF) configuration.
4 . The method of claim 1 , wherein the plurality of beam management states are different from each other in at least one of: a beam measurement configuration, a beam monitoring configuration, a feedback reporting configuration, or an uplink beam reference signal transmission configuration.
5 . The method of claim 1 , further comprising:
receiving linking information from a network that indicates the linking between the plurality of power states and the plurality of beam management states.
6 . The method of claim 1 , wherein the trigger condition includes at least one of:
receiving control signaling from a network instructing the WTRU to initiate the second power state;
detecting of an end of an active time of a discontinuous reception (DRX) cycle during which DRX is enabled such that a physical downlink control channel (PDCCH) is not monitored by the WTRU;
detecting a start of an on-duration of the DRX cycle during which DRX is disabled such that monitoring the PDCCH is enabled;
detecting a transition from a short DRX cycle to a long DRX cycle, wherein a cycle length of the short DRX cycle is less than a length threshold and a cycle length of the long DRX cycle is greater than the length threshold;
detecting a transition from the long DRX cycle to the short DRX cycle;
receiving a DRX command from the network;
detecting a presence of at least one signal associated with beam management; or
detecting an absence of at least one signal associated with beam management.
7 . The method of claim 1 , further comprising:
entering, as the second beam management state, a beam management state associated with wide beam reception at a start of an on-duration of a discontinuous reception (DRX) cycle of a receiver of the WTRU.
8 . The method of claim 1 , further comprising:
exiting, as the first beam management state, a beam management state associated with at least one backup beam or at least one narrow beam upon entering a long DRX state.
9 . A wireless transmit/receive unit (WTRU) configured to jointly perform beam management and power management, the WTRU comprising.
at least one processor configured to operate according to a plurality of power states and a plurality of beam management states that are linked to the plurality of power states such that each power state corresponds to a different beam management state, wherein the processor is configured to detect a trigger condition, transition between a first power state to a second power state based on the detected trigger condition, and transition between a first beam management state to a second beam management state responsive to the transition to the second power state to which the second beam management state is linked;
a receiver configured to operate according to the plurality of power states and the plurality of beam management states; and
a transmitter configured to operate according to the plurality of power states and the plurality of beam management states.
10 . The WTRU of claim 9 , wherein the plurality of power states includes at least two of: a long discontinuous reception (DRX) state, a short DRX state, an active low data throughput state, or an active high data throughput state.
11 . The WTRU of claim 9 , wherein the plurality of power states are different from each other in at least one of: a level of L1 and L2 processing, and a radio frequency (RF) configuration.
12 . The WTRU of claim 9 , wherein the plurality of beam management states are different from each other in at least one of a beam measurement configuration, a beam monitoring configuration, a feedback reporting configuration, or an uplink beam reference signal transmission configuration.
13 . The WTRU of claim 9 , wherein the receiver is configured to receive linking information from a network that indicates the linking between the plurality of power states and the plurality of beam management states.
14 . The WTRU of claim 9 , wherein the trigger condition includes at least one of:
the receiver configured to receive control signaling from a network instructing the WTRU to initiate the second power state;
the at least one processor configured to detect of an end of an active time of a discontinuous reception (DRX) cycle during which DRX is enabled such that a physical downlink control channel (PDCCH) is not monitored by the WTRU;
the at least one processor configured to detect a start of an on-duration of the DRX cycle during which DRX is disabled such that monitoring the PDCCH is enabled;
the at least one processor configured to detect a transition from a short DRX cycle to a long DRX cycle, wherein a cycle length of the short DRX cycle is less than a length threshold and a cycle length of the long DRX cycle is greater than the length threshold;
the at least one processor configured to detect a transition from the long DRX cycle to the short DRX cycle;
the receiver configured to receive a DRX command from the network;
the at least one processor configured to detect a presence of at least one signal associated with beam management; or
the at least one processor configured to detect an absence of at least one signal associated with beam management.
15 . The WTRU of claim 9 , wherein the at least one processor is configured to enter, as the second beam management state, a beam management state associated with wide beam reception at a start of an on-duration of a discontinuous reception (DRX) cycle of the receiver.
16 . The WTRU of claim 9 , wherein the at least one processor is configured to exit, as the first beam management state, a beam management state associated with at least one backup beam or at least one narrow beam upon entering a long DRX state.
17 . A method for jointly performing beam management and power management in a wireless transmit/receive unit (WTRU), the method comprising:
detecting a trigger condition;
transitioning the WTRU between a first beam management state to a second beam management state based on the detected trigger condition, wherein a plurality of beam management states, including the first beam management state and the second beam management state, are linked to a plurality of power states such that each beam management state corresponds to a different power state; and
transitioning the WTRU between a first power state to a second power state responsive to the transition to the second beam management state to which the second power state is linked.
18 . The method of claim 17 , wherein the plurality of power states includes at least two of: a long discontinuous reception (DRX) state, a short DRX state, an active low data throughput state, or an active high data throughput state.
19 . The method of claim 17 , wherein the plurality of power states are different from each other in at least one of: a level of L1 and L2 processing, and a radio frequency (RF) configuration.
20 . The method of claim 17 , wherein the plurality of beam management states are different from each other in at least one of a beam measurement configuration, a beam monitoring configuration, a feedback reporting configuration, or an uplink beam reference signal transmission configuration.