Communicating over multiple radio access technologies (rats)

Abstract

A user equipment (UE) may receive and transmit via frequency division duplex using a first paired spectrum with a first frequency for downlink and a second frequency for uplink. In response to the received control message, the UE may receive and transmit in different time intervals on the third frequency. The UE may also receive simultaneously on the first frequency for downlink and the third frequency.

1 .- 19 . (canceled) 
     
     
         20 . A user equipment (UE) comprising:
 a receiver; and   a transmitter, the receiver and the transmitter configured to receive and transmit via frequency division duplex using a first paired spectrum with a first frequency for downlink and a second frequency for uplink;   the receiver is further configured to receive, over the first frequency for downlink, a control message configuring a third frequency for communication using time division duplex; and   the receiver and the transmitter are further configured, in response to the received control message, to receive and transmit in different time intervals on the third frequency, wherein the receiver is further configured to receive substantially simultaneously on the first frequency for downlink and the third frequency.   
     
     
         21 . The UE of  claim 20 , wherein the receiver is further configured to receive downlink control signaling on the first frequency for downlink and, in response to the downlink control signaling, to receive downlink data using a time interval of the third frequency. 
     
     
         22 . The UE of  claim 20 , wherein the transmitter is further configured to transmit control signaling for the third frequency using the second frequency for uplink. 
     
     
         23 . The UE of  claim 20 , wherein the receiver is further configured to receive, on the first frequency for downlink, downlink control signaling to receive downlink data using a time interval of a fourth frequency, wherein the fourth frequency uses time division duplex and is different than the third frequency. 
     
     
         24 . A method performed by a user equipment (UE), the method comprising:
 receiving and transmitting, by the UE, via frequency division duplex using a first paired spectrum with a first frequency for downlink and a second frequency for uplink;   receiving, by the UE over the first frequency for downlink, a control message configuring a third frequency for communication using time division duplex; and   receiving and transmitting, by the UE in response to the received control message, in different time intervals on the third frequency; and   receiving, by the UE, substantially simultaneously on the first frequency for downlink and the third frequency.   
     
     
         25 . The method of  claim 24  further comprising receiving downlink control signaling on the first frequency for downlink and, in response to the downlink control signaling, to receive downlink data using a time interval of the third frequency. 
     
     
         26 . The method of  claim 24  further comprising transmitting control signaling for the third frequency using the second frequency for uplink. 
     
     
         27 . The method of  claim 24  further comprising receiving, on the first frequency for downlink, downlink control signaling to receive downlink data using a time interval of a fourth frequency, wherein the fourth frequency uses time division duplex and is different than the third frequency. 
     
     
         28 . A network device comprising:
 circuitry configured to receive and transmit via frequency division duplex using a first paired spectrum with a first frequency for downlink and a second frequency for uplink;   the circuitry is further configured to transmit, over the first frequency for downlink, a control message configuring a third frequency for communication using time division duplex; and   the circuitry is further configured, in response to the transmitted control message, to receive and transmit in different time intervals on the third frequency, wherein the circuitry is further configured to transmit substantially simultaneously on the first frequency for downlink and the third frequency.   
     
     
         29 . The network device of  claim 28 , wherein the circuitry is further configured to transmit downlink control signaling on the first frequency for downlink and, in response to the downlink control signaling, the circuitry is further configured to transmit downlink data using a time interval of the third frequency. 
     
     
         30 . The network device of  claim 28 , wherein the circuitry is further configured to receive control signaling for the third frequency using the second frequency for uplink. 
     
     
         31 . The network device of  claim 28 , wherein the circuitry is further configured to transmit, on the first frequency for downlink, downlink control signaling to transmit downlink data using a time interval of a fourth frequency, wherein the fourth frequency uses time division duplex and is different than the third frequency.