Method of performing handover for a dual transfer mode in a wireless mobile communication system

A method of supporting a Dual Transfer Mode (DTM) handover by a network in a wireless mobile communication system, the method comprising:

• transmitting information of neighbor cells, wherein the information is a list of neighbor cells whose signal strengths the MS should measure;
• receiving a message including results of the measured signal strengths of the neighbor cells;
• and
• transmitting a message to the MS from a network, wherein the message is a DTM Handover Command message which instructs the MS to perform a DTM handover procedure with one of the neighbor cells.

A device for performing a Dual Transfer Mode (DTM) handover in a wireless mobile communication system, the device comprising:

• a receiving block of a Radio Frequency (RF) module for:
• receiving information of neighbor cells, wherein the information is a list of neighbor cells whose signal strengths the device should measure, and
• receiving a message from a network, wherein the message is a DTM Handover Command message which instructs the device to perform a DTM handover procedure with one of the neighbor cells;
• and
• a transmitting block of the RF module for transmitting a message including results of the measured signal strengths of the neighbor cells.

A system for performing and supporting a Dual Transfer Mode (DTM) handover by a Mobile Station (MS) and a network in a wireless mobile communication system, the system comprising:

• the network which:
• transmits information of neighbor cells, wherein the information is a list of neighbor cells whose signal strengths the MS should measure,
• receives results of the measured signal strengths of the neighbor cells from a transmitting block of a Radio Frequency (RF) module of the MS, and
• transmits a DTM Handover Command message which instructs the MS to perform a DTM handover procedure with one of the neighbor cells;
• and
• the RF module of the MS which:
• receives at a receiving block the information of neighbor cells including the list of neighbor cells whose signal strengths the MS should measure,
• transmits from the transmitting block the results of the measured signal strengths of the neighbor cells, and
• receives at the receiving block the DTM Handover Command message.