BASE STATION, METHOD FOR SUPPORTING CS FALLBACK AND METHOD FOR OBTAINING SYSTEM INFORMATION OF THE SAME

摘要

A circuit switch fallback (CSFB) supporting method in a first network base station according to one embodiment of the present invention comprises the following steps: sending a voice call to a first adjacent network base station located near the first network base station; receiving, from the first adjacent network base station, a message for releasing radio resource control (RRC) including the system information of a second network cell; determining that a terminal device requires to make the transition to the second network; and transmitting, to the terminal device, the RRC release message including the system information of the second network cell. [Reference numerals] (AA) 3G base station;(BB) Terminal;(CC) LTE femto base station;(DD) LTE macro-base station;(S300,EE) Voice call;(S310,FF) RRC release message including adjacent 3G cell information;(S320) Collect adjacent 3G cell information;(S330) Receive and send a voice call;(S340) RRC release message including the previously collected adjacent 3G cell information;(S350) Make the transition to a 3G cell using the information included in the RRC release message