Radio Link Monitoring/Radio Link Failure Reconfiguration Upon Bandwidth Parts Switching

Abstract

A method in a user equipment (UE) ( 110 ) is disclosed. The method comprises obtaining ( 701 ) one or more radio link monitoring configurations, each radio link monitoring configuration associated with at least one bandwidth part. The method comprises determining ( 702 ) that the UE is to switch from a source bandwidth part to a target bandwidth part. The method comprises performing ( 703 ) radio link monitoring on the target bandwidth part according to an obtained radio link monitoring configuration associated with the target bandwidth part.

1 . A method in a user equipment (UE), comprising:
 obtaining one or more radio link monitoring configurations, each radio link monitoring configuration associated with at least one bandwidth part;   determining that the UE is to switch from a source bandwidth part to a target bandwidth part; and   performing radio link monitoring on the target bandwidth part according to an obtained radio link monitoring configuration associated with the target bandwidth part.   
     
     
         2 . The method of  claim 1 , wherein obtaining the one or more radio link monitoring configurations comprises receiving the one or more radio link monitoring configurations in a message from a network node. 
     
     
         3 . (canceled) 
     
     
         4 . The method of  claim 1 , wherein each radio link monitoring configuration comprises:
 a set of radio resources for performing radio link monitoring within its associated bandwidth part, wherein the set of radio resources comprises at least one of a Channel State Information Reference Signal (CSI-RS) resource or a Synchronization Signal Block (SSB); and   one or more configuration parameters for performing radio link monitoring within its associated bandwidth part.   
     
     
         5 .- 6 . (canceled) 
     
     
         7 . The method of  claim 4 , wherein the one or more configuration parameters for performing radio link monitoring within its associated bandwidth part comprise one or more of:
 one or more filtering parameters;   one or more radio link failure timers;   an evaluation period;   a number of retransmissions before radio link failure is declared;   a hypothetical channel configuration;   a hypothetical signal configuration; or   a mapping function for a measured link quality and a hypothetical channel block error rate.   
     
     
         8 .- 11 . (canceled) 
     
     
         12 . The method of  claim 1 , further comprising performing monitoring of a downlink channel quality of a first bandwidth part and a second bandwidth part, the performing monitoring comprising:
 estimating, during a first period of time, a radio link quality of the first bandwidth part according to a radio link monitoring configuration associated with the first bandwidth part; and   estimating, during a second period of time, a radio link quality of the second bandwidth part according to a radio link monitoring configuration associated with the second bandwidth part, wherein the second period of time at least partially overlaps with the first period of time.   
     
     
         13 . The method of  claim 12 , wherein:
 the first bandwidth part comprises the source bandwidth part; and   the second bandwidth part comprises the target bandwidth part.   
     
     
         14 . The method of  claim 12 , wherein the monitoring is triggered based on an activation rate of one or more of the first bandwidth part and the second bandwidth part. 
     
     
         15 . (canceled) 
     
     
         16 . The method of  claim 1 , wherein a plurality of radio link monitoring configurations are associated with the target bandwidth part, and the method further comprises:
 receiving an instruction via downlink control information to use one of the plurality of radio link monitoring configurations to perform radio link monitoring on the target bandwidth part.   
     
     
         17 . The method of  claim 1 , wherein a radio link monitoring configuration associated with the source bandwidth part and the radio link monitoring configuration associated with the target bandwidth part use the same radio resources, and performing radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part comprises:
 using one or more of previously-performed measurements and previously-performed measurement samples to generate out-of-sync and in-sync events.   
     
     
         18 . The method of  claim 1 , wherein a radio link monitoring configuration associated with the source bandwidth part and the radio link monitoring configuration associated with the target bandwidth part use different radio resources. 
     
     
         19 . The method of  claim 18 , wherein performing radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part comprises:
 applying a relation function to one or more of previously-performed measurements and previously-performed measurement samples to generate out-of-sync and in-sync events without resetting a radio link failure timer or a radio link failure counter.   
     
     
         20 . The method of  claim 18 , wherein performing radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part comprises:
 resetting at least one of a radio link failure timer and a radio link failure counter.   
     
     
         21 . The method of  claim 20 , wherein resetting at least one of a radio link failure timer and a radio link failure counter comprises:
 resetting a set of radio link failure timers and radio link failure counters associated with radio link monitoring for out-of-synch events; and   allowing a set of radio link failure timers and radio link failure counters associated with radio link monitoring for in-synch events to continue.   
     
     
         22 . The method of  claim 20 , wherein resetting at least one of a radio link failure timer and a radio link failure counter comprises:
 resetting one or more radio link failure timers without resetting any radio link failure counters.   
     
     
         23 .- 44 . (canceled) 
     
     
         45 . A user equipment (UE), comprising:
 a receiver;   a transmitter; and   processing circuitry coupled to the receiver and the transmitter, the processing circuitry configured to:
 obtain one or more radio link monitoring configurations, each radio link monitoring configuration associated with at least one bandwidth part; 
 determine that the UE is to switch from a source bandwidth part to a target bandwidth part; and 
 perform radio link monitoring on the target bandwidth part according to an obtained radio link monitoring configuration associated with the target bandwidth part. 
   
     
     
         46 . The UE of  claim 45 , wherein the processing circuitry configured to obtain the one or more radio link monitoring configurations is further configured to receive the one or more radio link monitoring configurations in a message from a network node. 
     
     
         47 . (canceled) 
     
     
         48 . The UE of  claim 45 , wherein each radio link monitoring configuration comprises:
 a set of radio resources for performing radio link monitoring within its associated bandwidth part, wherein the set of radio resources comprises at least one of a Channel State Information Reference Signal (CSI-RS) resource or a Synchronization Signal Block (SSB); and   one or more configuration parameters for performing radio link monitoring within its associated bandwidth part.   
     
     
         49 .- 50 . (canceled) 
     
     
         51 . The UE of  claim 48 , wherein the one or more configuration parameters for performing radio link monitoring within its associated bandwidth part comprise one or more of:
 one or more filtering parameters;   one or more radio link failure timers;   an evaluation period;   a number of retransmissions before radio link failure is declared;   a hypothetical channel configuration;   a hypothetical signal configuration; or   a mapping function for a measured link quality and a hypothetical channel block error rate.   
     
     
         52 .- 55 . (canceled) 
     
     
         56 . The UE of  claim 45 , wherein the processing circuitry is further configured to perform monitoring of a downlink channel quality of a first bandwidth part and a second bandwidth part, the processing circuitry configured to perform monitoring further configured to:
 estimate, during a first period of time, a radio link quality of the first bandwidth part according to a radio link monitoring configuration associated with the first bandwidth part; and   estimate, during a second period of time, a radio link quality of the second bandwidth part according to a radio link monitoring configuration associated with the second bandwidth part, wherein the second period of time at least partially overlaps with the first period of time.   
     
     
         57 . The UE of  claim 56 , wherein:
 the first bandwidth part comprises the source bandwidth part; and   the second bandwidth part comprises the target bandwidth part.   
     
     
         58 . The UE of  claim 56 , wherein the processing circuitry is further configured to trigger the monitoring based on an activation rate of one or more of the first bandwidth part and the second bandwidth part. 
     
     
         59 . (canceled) 
     
     
         60 . The UE of  claim 45 , wherein a plurality of radio link monitoring configurations are associated with the target bandwidth part, and the processing circuitry is further configured to:
 receive an instruction via downlink control information to use one of the plurality of radio link monitoring configurations to perform radio link monitoring on the target bandwidth part.   
     
     
         61 . The UE of  claim 45 , wherein a radio link monitoring configuration associated with the source bandwidth part and the radio link monitoring configuration associated with the target bandwidth part use the same radio resources, and the processing circuitry configured to perform radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part is further configured to:
 use one or more of previously-performed measurements and previously-performed measurement samples to generate out-of-sync and in-sync events.   
     
     
         62 . The UE of  claim 45 , wherein a radio link monitoring configuration associated with the source bandwidth part and the radio link monitoring configuration associated with the target bandwidth part use different radio resources. 
     
     
         63 . The UE of  claim 62 , wherein the processing circuitry configured to perform radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part is further configured to:
 apply a relation function to one or more of previously-performed measurements and previously-performed measurement samples to generate out-of-sync and in-sync events without resetting a radio link failure timer or a radio link failure counter.   
     
     
         64 . The UE of  claim 62 , wherein the processing circuitry configured to perform radio link monitoring on the target bandwidth part according to the obtained radio link monitoring configuration associated with the target bandwidth part is further configured to:
 reset at least one of a radio link failure timer and a radio link failure counter.   
     
     
         65 . The UE of  claim 64 , wherein the processing circuitry configured to reset at least one of a radio link failure timer and a radio link failure counter is further configured to:
 reset a set of radio link failure timers and radio link failure counters associated with radio link monitoring for out-of-synch events; and   allow a set of radio link failure timers and radio link failure counters associated with radio link monitoring for in-synch events to continue.   
     
     
         66 . The UE of  claim 62 , wherein the processing circuitry configured to reset at least one of a radio link failure timer and a radio link failure counter is further configured to:
 reset one or more radio link failure timers without resetting any radio link failure counters.   
     
     
         67 .- 88 . (canceled)