Patent ID: 9544920
Date: 2017-01-10
CPC Classifications: H04W

Claim:
1. A user equipment (UE) device, comprising: a radio transceiver to provide air interfaces to a master evolved Node B (MeNB) and a secondary evolved Node B (SeNB) that provide MeNB and SeNB cells, respectively; and processing circuitry connected to the radio transceiver to: initiate a random access procedure by transmitting a random access preamble to the SeNB and the MeNB; receive a random access response (RAR) over the MeNB cell, distinguish between an RAR received in response to the random access preamble transmitted to the SeNB and an RAR received in response to the random access preamble transmitted to the MeNB by using separately derived random access radio network temporary network identifiers (RA-RNTIs).