Carrier aggregation (ca) configuration during dual-active-protocol stack (daps) handover (ho)

Abstract

Certain aspects of the present disclosure are directed to a method for wireless communication. The method generally includes receiving a message for dual-active-protocol stack (DAPs) handover (HO) from a source network entity to a target network entity, wherein carrier-aggregation (CA) is configured with the source network entity prior to reception of the message for HO, deactivating the CA in response to reception of the message for handover (HO) to activate a single carrier mode with the source network entity, and performing the HO from the source network entity to the target network entity during a HO period, wherein the single carrier mode is maintained with the source network entity during at least a portion of the HO period, and wherein connection with the target network entity is maintained during the at least the portion of the HO period.

1 . An apparatus for wireless communication at a user equipment (UE), comprising:
 a memory comprising instructions; and   a processor configured to execute the instructions and cause the apparatus to:
 receive a handover message for a dual-active-protocol stack (DAPS) handover (HO) from a source network entity to a target network entity, after deactivation or release of a carrier aggregation (CA) mode configured with the source network entity; and 
 perform the DAPS HO from the source network entity to the target network entity, in response to the handover message. 
   
     
     
         2 . The apparatus of  claim 1 , wherein the CA mode is configured with the target network entity after the DAPS HO. 
     
     
         3 . The apparatus of  claim 1 , wherein the processor is further configured to execute the instructions and cause the apparatus to receive a configuration message indicating to release connection with the source network entity. 
     
     
         4 . The apparatus of  claim 1 , wherein the processor is further configured to execute the instructions and cause the apparatus to activate a single carrier mode with the source network entity during the DAPS HO. 
     
     
         5 . The apparatus of  claim 1 , wherein a single carrier mode is configured with the target network entity during the DAPS HO. 
     
     
         6 . An apparatus for wireless communication at a source network entity, comprising:
 a memory comprising instructions; and   a processor configured to execute the instructions and cause the apparatus to:
 generate a handover message for a user equipment (UE) for a dual-active-protocol stack (DAPS) handover (HO) from the source network entity to a target network entity; 
 deactivate or release a carrier aggregation (CA) mode configured with the source network entity; and 
 transmit the handover message to the UE, after the deactivation of the CA mode. 
   
     
     
         7 . The apparatus of  claim 6 , wherein the CA mode is configured with the target network entity after the DAPS HO. 
     
     
         8 . The apparatus of  claim 6 , wherein the processor is further configured to execute the instructions and cause the apparatus to transmit a configuration message indicating to release connection with the source network entity. 
     
     
         9 . The apparatus of  claim 6 , wherein the processor is further configured to execute the instructions and cause the apparatus to activate a single carrier mode during the DAPS HO. 
     
     
         10 . The apparatus of  claim 6 , wherein a single carrier mode is configured with the target network entity during the DAPS HO. 
     
     
         11 . A method for wireless communication at a user equipment (UE), comprising:
 receiving a handover message for a dual-active-protocol stack (DAPS) handover (HO) from a source network entity to a target network entity, after deactivation or release of a carrier aggregation (CA) mode configured with the source network entity; and   performing the DAPS HO from the source network entity to the target network entity, in response to the handover message.   
     
     
         12 . The method of  claim 11 , wherein the CA mode is configured with the target network entity after the DAPS HO. 
     
     
         13 . The method of  claim 11 , further comprising receiving a configuration message indicating to release connection with the source network entity. 
     
     
         14 . The method of  claim 11 , further comprising activating a single carrier mode with the source network entity during the DAPS HO. 
     
     
         15 . The method of  claim 11 , wherein a single carrier mode is configured with the target network entity during the DAPS HO. 
     
     
         16 . A method for wireless communication at a source network entity, comprising:
 generating a handover message for a user equipment (UE) for a dual-active-protocol stack (DAPS) handover (HO) from the source network entity to a target network entity;   deactivating or releasing a carrier aggregation (CA) mode configured with the source network entity; and   transmitting the handover message to the UE, after the deactivation of the CA mode.   
     
     
         17 . The method of  claim 16 , wherein the CA mode is configured with the target network entity after the DAPS HO. 
     
     
         18 . The method of  claim 16 , further comprising transmitting a configuration message indicating to release connection with the source network entity. 
     
     
         19 . The method of  claim 16 , further comprising activating a single carrier mode during the DAPS HO. 
     
     
         20 . The method of  claim 16 , wherein a single carrier mode is configured with the target network entity during the DAPS HO.