Method for transmitting data according to edt

Abstract

One disclosure of the present specification provides a method for supporting early data transmission (EDT) by a base station. The method may comprise a step of receiving a first message from a mobility management entity (MME). A first NAS message may include downlink data. The method may further comprise a step of confirming that there is no additional data other than the downlink data, on the basis of reception of the first NAS message.

What is claimed is: 
     
         1 . A method performed by a wireless device in a wireless communication system, the method comprising:
 transmitting, to a base station, a random access preamble for a random access procedure;   receiving, from the base station, a random access response for the random access procedure;   transmitting, to the base station, a first Radio Resource Control (RRC) message for the random access procedure, wherein the first RRC message includes an uplink data for an Early Data Transmission (EDT); and   receiving, from the base station, a second RRC message for the random access procedure;   wherein the second RRC message includes a downlink data based on that there is no further data besides the downlink data; and   wherein (i) the downlink data and (ii) an indication informing that there is no further data besides the downlink data are included in a non-access-stratum (NAS) message acquired by the base station.   
     
     
         2 . The method of  claim 1 ,
 wherein the NAS message includes a downlink NAS transport message.   
     
     
         3 . The method of  claim 1 ,
 wherein the uplink data is forwarded to a Mobility Management Entity (MME).   
     
     
         4 . The method of  claim 3 ,
 wherein the uplink data is included in an Initial UE message transmitted to the MME from the base station.   
     
     
         5 . The method of  claim 1 ,
 wherein the NAS message is transmitted to the base station from an MME.   
     
     
         6 . The method of  claim 1 ,
 wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.   
     
     
         7 . A wireless device in a wireless communication system, the wireless device comprising:
 a transceiver;   a memory; and   a processor coupled to the memory and the transceiver, the processor is adapted to:   control the transceiver to transmit, to a base station, a random access preamble for a random access procedure;   control the transceiver to receive, from the base station, a random access response for the random access procedure;   control the transceiver to transmit, to the base station, a first Radio Resource Control (RRC) message for the random access procedure, wherein the first RRC message includes an uplink data for an Early Data Transmission (EDT); and   control the transceiver to receive, from the base station, a second RRC message for the random access procedure;   wherein the second RRC message includes a downlink data based on that there is no further data besides the downlink data; and   wherein (i) the downlink data and (ii) an indication informing that there is no further data besides the downlink data are included in a non-access-stratum (NAS) message acquired by the base station.   
     
     
         8 . The wireless device of  claim 7 ,
 wherein the NAS message includes a downlink NAS transport message.   
     
     
         9 . The wireless device of  claim 7 ,
 wherein the uplink data is forwarded to a Mobility Management Entity (MME).   
     
     
         10 . The wireless device of  claim 9 ,
 wherein the uplink data is included in an Initial UE message transmitted to the MME from the base station.   
     
     
         11 . The wireless device of  claim 7 ,
 wherein the NAS message is transmitted to the base station from an MME.   
     
     
         12 . The wireless device of  claim 7 ,
 wherein the wireless device is in communication with at least one of a user equipment, a network, or an autonomous vehicle other than the wireless device.