A method of transmitting data, the method comprising: generating, with a wireless device, an application data message (8A, 8B, 8C, 8D) for an application; evaluating one or more criteria to determine whether to send the application data message (8A, 8B, 8C, 8D) via a data radio bearer, DRB, channel or via a signaling radio bearer, SRB, channel that communicatively couples the wireless device to a network resource; and based on determining to send the application data message via the SRB channel, sending the application data message to the network resource via the SRB channel, wherein: determining to send the application data message via the SRB channel comprises: determining that the application data message has a data size that is less than a data size threshold; and determining that the application has requested data transmission via the SRB channel wherein: generating the application data message (8A, 8B, 8C, 8D) comprises: generating one or more application data packets that each comprise data for the application, and a header that specifies a mobile identifier associated with the wireless device of a packet data network, and a destination internet protocol, IP, address associated with the application and wherein the destination address associated with the application comprises an address of an application server associated with the application, wherein the application server is accessible via the packet data network, the method further comprising providing, during radio resource control, RRC, connection setup, by the wireless device, an indication of an intent to use the SRB channel for transmitting short data packets. generating, with a wireless device, an application data message (8A, 8B, 8C, 8D) for an application; evaluating one or more criteria to determine whether to send the application data message (8A, 8B, 8C, 8D) via a data radio bearer, DRB, channel or via a signaling radio bearer, SRB, channel that communicatively couples the wireless device to a network resource; and based on determining to send the application data message via the SRB channel, sending the application data message to the network resource via the SRB channel, wherein: determining to send the application data message via the SRB channel comprises: determining that the application data message has a data size that is less than a data size threshold; and determining that the application has requested data transmission via the SRB channel wherein: generating the application data message (8A, 8B, 8C, 8D) comprises: generating one or more application data packets that each comprise data for the application, and a header that specifies a mobile identifier associated with the wireless device of a packet data network, and a destination internet protocol, IP, address associated with the application and wherein the destination address associated with the application comprises an address of an application server associated with the application, wherein the application server is accessible via the packet data network, the method further comprising providing, during radio resource control, RRC, connection setup, by the wireless device, an indication of an intent to use the SRB channel for transmitting short data packets. determining to send the application data message via the SRB channel comprises: determining that the application data message has a data size that is less than a data size threshold; and determining that the application has requested data transmission via the SRB channel wherein: determining that the application data message has a data size that is less than a data size threshold; and determining that the application has requested data transmission via the SRB channel wherein: generating the application data message (8A, 8B, 8C, 8D) comprises: generating one or more application data packets that each comprise data for the application, and a header that specifies a mobile identifier associated with the wireless device of a packet data network, and a destination internet protocol, IP, address associated with the application and wherein the destination address associated with the application comprises an address of an application server associated with the application, wherein the application server is accessible via the packet data network, the method further comprising providing, during radio resource control, RRC, connection setup, by the wireless device, an indication of an intent to use the SRB channel for transmitting short data packets.