Apparatus and method for handover between a heterogeneous communication system and a broadband wireless communication system

An operating method of a terminal for a handover between a first communication system and a second communication system, the method comprising:

• transmitting, by the terminal, a message reporting of the signal level of the downlink, to a base station;
• receiving, by the terminal, a message including a radio channel parameter that is required when the terminal accesses the second communication system, from the base station;
• and
• attempting, by the terminal, the handover from the first communication system to the second communication system using the radio channel parameter of the second communication system received from the base station of the first communication system,
• wherein the first communication system receives the message including the radio channel parameter from the second communication system and forwards the message including the radio channel parameter to the base station of the first communication system,
• wherein the handover between the first communication system and the second communication system comprises an inter Radio Access Technologies (RAT) handover.

A base station of a cell of a first communication system for a handover between the first communication system and a second communication system, the base station comprising:

• a controller for transmitting, to a terminal, a message requesting a measurement of a signal level of a downlink;
• a handover processor for determining a handover initiation to the second communication system, based on the measured signal level of the downlink and transmitting a handover request message to the second communication system via a core network;
• and
• an interface for receiving a message, including a radio channel parameter that is required when the terminal accesses the second communication system, from the second communication system via the core network,
• wherein the controller forwards the message, including the radio channel parameter of the second communication system, to the terminal,
• wherein the handover between the first communication system and the second communication system comprises an inter Radio Access Technologies (RAT) handover.

A terminal for a handover between a first communication system and a second communication system, the terminal comprising:

• a controller for transmitting a message reporting of the signal level of the downlink to a base station;
• and
• a handover controller for receiving a message including a radio channel parameter that is required when the terminal accesses the second communication system, from the base station and for attempting the handover from the first communication system to the second communication system using the radio channel parameter of the second communication system received from the base station of the first communication system,
• wherein the first communication system receives the message including the radio channel parameter from the second communication system and forwards the message including the radio channel parameter to the base station of the first communication system,
• wherein the handover between the first communication system and the second communication system comprises an inter Radio Access Technologies (RAT) handover.