Patent ID: 9668174
Date: 2017-05-30
CPC Classifications: H04W

Claim:
1. A mobile communication method comprising: a step A of causing a first radio base station to send a second radio base station a carrier aggregation preparation signal when the first radio base station determines to start carrier aggregation for a mobile station, where the carrier aggregation uses the first radio base station and the second radio base station; a step B of causing the second radio base station to send the first radio base station a confirmation signal in response to the carrier aggregation preparation signal; a step C of causing the first radio base station to send the mobile station a connection reconfiguration signal in response to the confirmation signal; a step D of causing the mobile station to perform a random access procedure with the second radio base station in response to the connection reconfiguration signal; a step E of causing the mobile station to send the second radio base station a connection reconfiguration completion signal when the random access procedure is completed; a step F of causing the second radio base station to send a core network device a path switch request signal; a step G of causing the core network device to send the second radio base station a path switch completion signal; and a step H of causing the second radio base station to send the first radio base station a carrier aggregation procedure completion signal indicating completion of a procedure for starting the carrier aggregation.