Multiple sim multiple standby strategy on a ue with carrier aggregation

Abstract

A method of minimizing service degradation caused by other-SIM-occupancy of a DSDS or MSMS UE under carrier aggregation is proposed. A UE performs CC selection from the multiple CCs associated with a first SIM to suffer from other-SIM-occupancy to minimize potential service degradation. In a first option, the UE selects one or more CCs that are relatively harmless from other-SIM-occupancy to share HW resource with CCs associated with other SIMs. In a second option, the UE schedules other-SIM-occupancy on more than one CCs of the first SIM to reduce the frequency and duration of the other-SIM-occupancy affected to each chosen CC of the first SIM.

1 . A method, comprising:
 establishing a data connection under carrier aggregation by a user equipment (UE) in a mobile communication network, wherein the UE is equipped with the first Subscriber Identity Module (SIM) card and a second SIM card;   performing ongoing data communication over multiple component carriers (CCs) associated with the first SIM card using a set of radio frequency hardware resources;   selecting a component carrier with the lowest priority based on a list of factors; and   monitoring incoming activities from the second SIM card over the selected CC with a predefined frequency and a predefined duration using the same set of radio frequency hardware resources.   
     
     
         2 . The method of  claim 1 , wherein a primary CC has a higher priority than a secondary CC. 
     
     
         3 . The method of  claim 1 , wherein a CC associated with a master base station has a higher priority than a CC associated with a secondary base station. 
     
     
         4 . The method of  claim 1 , wherein a CC has an ongoing service has higher priority than a CC has no ongoing service. 
     
     
         5 . The method of  claim 1 , wherein the list of factors for selecting a CC comprises at least one of UE capability, a bandwidth, a duplex mode, a time division duplex (TDD) configuration, and allocated resource. 
     
     
         6 . The method of  claim 1 , wherein two CCs are selected for monitoring the incoming activities from the second SIM card with a round robin fashion. 
     
     
         7 . The method of  claim 6 , wherein each CC monitors the incoming activities from the second SIM card with a reduced frequency or a reduced duration. 
     
     
         8 . A method, comprising:
 establishing a data connection under carrier aggregation by a user equipment (UE) in a mobile communication network, wherein the UE is equipped with the first Subscriber Identity Module (SIM) card and a second SIM card;   performing ongoing data communication over multiple component carriers (CCs) associated with the first SIM card using a set of radio frequency hardware resources;   selecting multiple CCs in accordance with a predetermined rule; and   monitoring incoming activities from the second SIM card over the multiple selected CCs, wherein each CC monitors with a predefined frequency and a predefined duration using the same set of radio frequency hardware resources.   
     
     
         9 . The method of  claim 8 , wherein the multiple CCs are selected to monitor the incoming activities based on a round robin fashion. 
     
     
         10 . The method of  claim 8 , wherein if more CCs are selected, then each CC monitors the incoming activities with a reduced frequency or with a reduced duration. 
     
     
         11 . A user equipment (UE), comprising:
 a first Subscriber Identity Module (SIM) card;   a second Subscriber Identity Module (SIM) card;   a radio resource control (RRC) module that establishes a data connection under carrier aggregation in a mobile communication network, wherein the UE performs ongoing data communication over multiple component carriers (CCs) associated with the first SIM card;   a CC selector that selects a component carrier in accordance with a predetermined rule; and   a radio signal transceiver that monitors incoming activities from the second SIM card over the selected CC with a predefined frequency and a predefined duration.   
     
     
         12 . The UE of  claim 11 , wherein the predetermined rule is for assigning priorities to each CC based on a list of factors. 
     
     
         13 . The UE of  claim 12 , wherein a primary CC has a higher priority than a secondary CC. 
     
     
         14 . The UE of  claim 12 , wherein a CC associated with a master base station has a higher priority than a CC associated with a secondary base station. 
     
     
         15 . The UE of  claim 12 , wherein a CC has an ongoing service has higher priority than a CC has no ongoing service. 
     
     
         16 . The UE of  claim 12 , wherein the list of factors for selecting a CC comprises at least one of UE capability, a bandwidth, a duplex mode, a time division duplex (TDD) configuration, and allocated resource. 
     
     
         17 . The UE of  claim 11 , wherein two CCs are selected for monitoring the incoming activities from the second SIM card with a round robin fashion. 
     
     
         18 . The UE of  claim 17 , wherein each CC monitors the incoming activities from the second SIM card with a reduced frequency or a reduced duration. 
     
     
         19 . The UE of  claim 11 , wherein the predetermined rule is to select multiple CCs to monitor the incoming activities based on a round robin fashion. 
     
     
         20 . The UE of  claim 19 , wherein if more CCs are selected, then each CC monitors the incoming activities with a reduced frequency or with a reduced duration.