Radio coexistence in wireless networks

Abstract

Technology for avoiding in-device coexistence (IDC) interference between multiple radio transceivers at a user equipment (UE). The UE may identify a subframe with substantially no IDC interference from one or more of the multiple radio transceivers at the UE. The UE may determine that the subframe with substantially no IDC interference occurs during an unscheduled period of a Discontinuous Reception (DRX) cycle for the UE. The UE may perform Radio Link Monitoring (RLM) during the subframe with substantially no IDC interference during the unscheduled period of the DRX cycle for the UE.

What is claimed is: 
     
         1 . A user equipment (UE) operable to avoid in-device coexistence (IDC) interference between multiple radio transceivers at the UE, the UE having circuitry configured to:
 identify a subframe with substantially no IDC interference from one or more of the multiple radio transceivers at the UE;   determine that the subframe with substantially no IDC interference occurs during an unscheduled period of a Discontinuous Reception (DRX) cycle for the UE; and   perform Radio Link Monitoring (RLM) during the subframe with substantially no IDC interference during the unscheduled period of the DRX cycle for the UE.   
     
     
         2 . The circuitry of  claim 1 , wherein RLM measurements obtained at the UE are not substantially impacted by the IDC interference. 
     
     
         3 . The circuitry of  claim 1 , wherein the multiple radio transceivers at the UE comprise at least two of: a Third Generation Partnership Project Long Term Evolution (3GPP LTE) radio transceiver, a Wireless Local Access Network (WLAN) transceiver, a Bluetooth transceiver, and a Global Navigation Satellite System (GNSS) receiver. 
     
     
         4 . The circuitry of  claim 1 , further configured to perform the RLM during the subframe with substantially no IDC interference during the scheduled period or the unscheduled period of the DRX cycle for the UE in order to substantially avoid radio link failure (RLF) at the UE. 
     
     
         5 . The circuitry of  claim 1 , further configured to:
 determine that the subframe with substantially no IDC interference occurs during a scheduled period of the DRX cycle for the UE; and   perform the RLM during the subframe with substantially no IDC interference during the scheduled period of the DRX cycle for the UE.   
     
     
         6 . The circuitry of  claim 1 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port. 
     
     
         7 . A non-transitory computer readable medium encoded with computer executable instructions, which when accessed, cause a machine to perform operations comprising:
 identifying a subframe with substantially no IDC interference between multiple radio transceivers at the UE;   determining that the subframe with substantially no IDC interference occurs during one of a scheduled period or an unscheduled period of a long Discontinuous Reception (DRX) cycle for the UE; and   performing Radio Link Monitoring (RLM), at the UE, using the subframe with substantially no IDC interference during the scheduled period or the unscheduled period of the long DRX cycle for the UE.   
     
     
         8 . The non-transitory computer readable medium encoded with computer executable instructions of  claim 7 , further comprising obtaining RLM measurements, at the UE, which are not substantially impacted by the IDC interference. 
     
     
         9 . The non-transitory computer readable medium encoded with computer executable instructions of  claim 7 , further comprising performing the RLM, at the UE, using the subframe with substantially no IDC interference during the scheduled period or the unscheduled period of the long DRX cycle for the UE in order to substantially avoid radio link failure (RLF) at the UE. 
     
     
         10 . The non-transitory computer readable medium encoded with computer executable instructions of  claim 7 , wherein the multiple radio transceivers at the UE comprise at least two of: a Third Generation Partnership Project Long Term Evolution (3GPP LTE) radio transceiver, a Wireless Local Access Network (WLAN) transceiver, a Bluetooth transceiver, and a Global Navigation Satellite System (GNSS) receiver. 
     
     
         11 . The non-transitory computer readable medium encoded with computer executable instructions of  claim 7 , further comprising performing the RLM at the UE in order to turn off uplink (UL) transmissions at the UE when downlink (DL) quality is below a defined threshold. 
     
     
         12 . The non-transitory computer readable medium encoded with computer executable instructions of  claim 7 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port. 
     
     
         13 . A wireless device operable to avoid in-device coexistence (IDC) interference between multiple radio transceivers at the wireless device, the wireless device having circuitry configured to:
 identify a subframe with substantially no IDC interference from one or more of the multiple radio transceivers at the wireless device;   determine that the subframe with substantially no IDC interference occurs during a Discontinuous Reception (DRX) cycle for the wireless device; and   perform Radio Link Monitoring (RLM) at the subframe with substantially no IDC interference during the DRX cycle for the wireless device.   
     
     
         14 . The circuitry of  claim 13 , further configured to obtain RLM measurements that are not substantially impacted by the IDC interference. 
     
     
         15 . The circuitry of  claim 13 , further configured to determine that the subframe with substantially no IDC interference occurs during at least one of a scheduled period or an unscheduled period of the DRX cycle for the wireless device. 
     
     
         16 . The circuitry of  claim 13 , wherein the multiple radio transceivers at the wireless device comprise at least two of: a Third Generation Partnership Project Long Term Evolution (3GPP LTE) radio transceiver, a Wireless Local Access Network (WLAN) transceiver, a Bluetooth transceiver, and a Global Navigation Satellite System (GNSS) receiver. 
     
     
         17 . The circuitry of  claim 13 , further configured to perform the RLM using the subframe with substantially no IDC interference during the DRX cycle for the wireless device in order to substantially avoid radio link failure (RLF) at the wireless device. 
     
     
         18 . The circuitry of  claim 13 , further configured to perform the RLM at the wireless device in order to turn off uplink (UL) transmissions at the wireless device when downlink (DL) quality is below a defined threshold. 
     
     
         19 . The circuitry of  claim 13 , wherein the DRX cycle for the wireless device is a long DRX cycle. 
     
     
         20 . The circuitry of  claim 13 , wherein the wireless device includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.