Patent ID: 9743448
Date: 2017-08-22
CPC Classifications: H04B,H04L,H04W

Claim:
1. A radio communication system comprising: a first eNB (eNodeB) that operates a first cell; a second eNB that operates a second cell, and a radio terminal capable of aggregating the first cell as a primary cell with the second cell as a secondary cell, wherein the first eNB outputs, to the second eNB, a first request for the second eNB, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by the radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell, the second eNB outputs, to the first eNB, radio resource configuration information of the second cell, and the first eNB transmits, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell, while the established first radio connection between the first eNB and the radio terminal is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least