Devices, systems and methods for power efficient beam management in wireless systems

Abstract

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.