Patent ID: 9326198
Filing Date: 2016-04-26
CPC Classification: H04W

Claim Text:
1. A communication system including: a mobile station connectable to a first radio communication system and a second radio communication system which uses a different radio access technology from the first radio communication system and uses a plurality of frequency bands; and a communication control device configured to control switching of the mobile station from the first radio communication system to the second radio communication system, wherein the communication control device comprises a switching instruction transmission unit configured to transmit to the mobile station a switching instruction which gives an instruction to switch from the first radio communication system to the second radio communication system and an indication on a plurality of switching target frequencies included in the plurality of frequency bands used by the second radio communication system, wherein the switching instruction transmission unit transmits the switching instruction in response to a connection request from the mobile station before acquisition of information relating to a frequency band which is capable of transmission/reception by the mobile station, and the mobile station comprises: