Patent ID: 9654256
Date: 2017-05-16
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method of establishing a Radio Resource Control (RRC) connection in a wireless communication system, the method comprising: transmitting, from a first protocol entity, a RRC connection request message to a second protocol entity; receiving, by the first protocol entity, a RRC connection setup message from the second protocol entity in response to the transmitted RRC connection request message; and transmitting, from the first protocol entity, a RRC connection setup complete message to the second protocol entity after receiving the RRC connection setup message, wherein the steps of transmitting the RRC connection request message, receiving the RRC connection setup message, and the transmitting the RRC connection setup complete message are performed during a RRC connection establishment, wherein the RRC connection setup complete message includes a specific indicator only if the first protocol entity is connecting as a Relay Node (RN) entity, wherein the specific indicator indicates that the RRC connection establishment is for the RN entity, wherein the second protocol entity is a Donor evolved Node B (DeNB), and wherein, when a User Equipment (UE) receives a Packet Data Convergence Protocol (PDCP) Protocol Data Unit (PDU), a ciphering key set between the UE and the DeNB is used to decipher the received PDCP PDU.