| CPC H04W 74/0841 (2013.01) [H04L 1/0061 (2013.01); H04W 80/02 (2013.01)] | 15 Claims |

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1. A user equipment, comprising:
at least one processor; and
at least one memory including computer program code,
wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the user equipment at least to:
send a trigger message and unique identifier in a first message from the user equipment to a network node; and
receive an acknowledgement at the user equipment in a second message from the network node using the user equipment's unique identifier, wherein contention resolution for the user equipment is concluded with only the first message and the second message,
wherein the trigger message comprises a common control channel message, and the unique identifier comprises a hash identifier, or
wherein the trigger message comprises a dedicated control channel message or a dedicated traffic channel message.
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