Apparatus and method for accomplishing handoff between mobile communication systems of different generations

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein the protocol conversion includes converting packets of a first type to packets of a second type with one of said first or second type of packets corresponding an asynchronous transfer mode (ATM) packet and the other of said first or second type of packets corresponding to an inter processor communication (IPC) packet, wherein the address mapping performed by the gateway includes mapping at least one type of message between the first and second mobile communication systems, and
• wherein one or more packets of the first type include a data frame transmitted to the gateway from the first mobile communication system, the data frame comprising an inter processor communication header and inter processor communication data, the inter processor communication data including at least a source address, a target address, a source task identifier (ID), and a target task ID.

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein said address mapping is performed based on a data frame transmitted to the gateway from the second mobile communication system after going through message processing, wherein the data frame comprises an internet protocol header and an internet protocol data, and the internet protocol data includes at least a source address, a target address, a source task identifier (ID), and a target task ID.

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein said address mapping is performed based on a data frame transmitted to the first mobile communication system from the gateway after going through message processing,
• wherein the data frame comprises an inter processor communication header and an inter processor communication data, and the inter processor communication data includes at least a target address, and a target task identifier (ID).

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein the address mapping and the protocol conversion enable transmission and reception of at least a signaling message and traffic data between the first and second mobile communication systems, and
• wherein a data frame transmitted to the gateway from the first mobile communication system after going through message processing comprises an inter processor communication header and inter processor communication data, and the inter processor communication data includes at least a source address, a target address, a source task identifier (ID), and a target task ID.

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein the address mapping and the protocol conversion enable transmission and reception of at least a signaling message and traffic data between the first and second mobile communication systems, and
• wherein a data frame transmitted to the second mobile communication system from the gateway after going through message processing comprises at least an internet protocol header and an internet protocol data, and the internet protocol data includes at least a source address, a target address, a source task identifier (ID), and a target task ID.

A method for accomplishing a handoff between mobile communication systems using a gateway, the method comprising:

• transmitting a handoff request message from a first mobile communication system to the gateway by performing a message process;
• transmitting the handoff request message from the gateway to a second mobile communication system by performing at least an address mapping and a protocol conversion between the first and second mobile communication systems;
• and
• assigning, at the second mobile communication system, the message process and a channel, wherein the address mapping and the protocol conversion enable transmission and reception of at least a signaling message and traffic data between the first and second mobile communication systems, and
• wherein a data frame transmitted to the gateway from the second mobile communication system after going through message processing comprises an internet protocol header and internet protocol data, and the internet protocol data includes at least a source address, a target address, a source task identifier (ID), a target task ID.