| 摘要 |
A machine-to-machine (M2M) device sends on a random access channel (RACH) an indication of a small data transmission, and thereafter sends the small data on an initial uplink resource allocated in response to the indication. The network sends a connection rejection message which the M2M device interprets as an acknowledgement of the small data it sent. In one embodiment the indication is explicit and also indicates priority, type and/or size of the small data. In another embodiment the indication is implicit such as a RACH preamble signature sequence reserved for this purpose, where different reserved sequences map to different sizes for the small data. If needed, a second indication can be sent with the small data which indicates its type, size and/or priority. The connection rejection message may indicate the acknowledgement via a cause value, and in response the M2M device then automatically enters an idle or a detached mode. |
