Patent ID: 8867416

Claim:
A method for controlling a load balance between a code division multiple access (CDMA) 2000 1X Evolution-Data Optimized (EV-DO) network and a CDMA2000 1X network, comprising: receiving, by a base station controller (BSC) in the CDMA2000 1X EV-DO network, a connection request message sent by a terminal in the CDMA2000 1X EV-DO network; determining, by the BSC in the CDMA2000 1X EV-DO network, that a load of the CDMA2000 1X EV-DO network is higher than a threshold; sending, by the BSC in the CDMA2000 1X EV-DO network, a load query message for querying a load status of the CDMA2000 1X network to a BSC in the CDMA2000 1X network after determining that the load of the CDMA2000 1X EV-DO network is higher than the threshold; receiving, by the BSC in the CDMA2000 1X EV-DO network, a load query response message sent by the BSC in the CDMA2000 1X network, wherein the load query response message indicates that the CDMA2000 1X network is not overloaded; and in responsive to the load query response message, sending, by the BSC in the CDMA2000 1X EV-DO network, a system switchover message to the BSC in the CDMA2000 1X network to instruct the BSC in the CDMA2000 1X network to switch the terminal from the CDMA2000 1X EV-DO network to the CDMA2000 1X network.