Method and apparatus supporting random access transmissions

A method performed by a user device configured for operation in a first state and a second state, the first state being characterized by the user device using additional accessibility than the second state, the method comprising:

• performing a measurement on one or more cells neighboring a first cell;
• transmitting, in the first state, information obtained from the measurement to the first cell;
• receiving, in the first state, a first message indicating information on a second cell, that is not the first cell, for the user device to select for communication;
• and
• in response to receiving the first message, the method further comprising:
• transitioning from the first state to the second state associated with the first cell;
• resetting a sequence number and a buffer associated with the first cell;
• ceasing use of a first device identifier associated with the first cell;
• performing a random access transmission to the second cell;
• receiving a second message including a second device identifier associated with the second cell;
• and
• communicating with the second cell using the received second device identifier.