CPC H04W 74/0833 (2013.01) [H04L 5/0055 (2013.01); H04W 74/008 (2013.01); H04W 76/27 (2018.02)] | 17 Claims |
15. A user equipment (UE), comprising:
a memory storing instructions; and
a processor configured to execute the instructions to cause the UE to:
trigger a medium access control (MAC) layer to initiate a random access procedure for transmitting a preamble, wherein the preamble corresponds to a piece of system information (SI), wherein the piece of SI is required by a radio resource control (RRC) layer of the UE;
receive, in the RRC layer, an indication from the MAC layer;
acquire, in the RRC layer, the piece of SI required by the RRC layer of the UE when the indication is received from the MAC layer;
receive information about a plurality of preamble sequences, a plurality of pieces of SI, and a plurality of system information blocks (SIBs), wherein:
a first one of the pieces of SI is required by the UE,
a second one of the pieces of SI is associated with two of the SIBs, and
the two of the SIBs have a same scheduling period;
select one of the preamble sequences based on the information and the first one of the pieces of SI required by the UE; and
transmit the selected one of the preamble sequences as the preamble to a base station.
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