Handover method between mobile switching centers using intelligent network and IMT-2000 network system adapting the same

Claim 2

In an IMT-2000 network system comprising a RAN (Radio Access Network) including a plurality of MT (Mobile Terminal), a plurality of BTS (Base Terminal Station) connected with a plurality of the MT based on a wireless connection for controlling the MT, and a plurality of RNC (Radio Network Controller) for controlling a plurality of the BTS, CN (Core Network) which is connected with a VLR (Visited Location Register) and HLR/GLR (Home Location Register/Gateway Location Register) and includes a plurality of MSC (Mobile Switching Center) which registers and manages the RNC in the RAN for thereby transferring and exchanging a radio resource and performs a high speed transfer function and exchanging function with respect to multimedia service, and an IN (Intelligent Network including a SCP (Service Control Point) provided with a data used for a service, and an IP (Intelligent Peripheral) provided various multimedia services, and improved IMT-2000 network system comprising: a plurality of RNC each formed of a RACF (Radio Access Control Function) for managing a radio resource and call, an ARF (Access Link Relay Function) for performing an anchor handover between the RNC, and a SACF (Service Access Control Function) for managing and controlling the service; a first through third MSC including a SSF (Service Switching Function) for analyzing a service transferred from each of IN and transferring a proper work request to the CCF (Call Control Function) and a CCF for transferring a service request message to the SSF and processing a service request transferred from the SSF; and wherein the SCP of a corresponding IN requests a handover to the third MSC includes the SSF of the CN and the SACF for the managing and controlling the services to request a handover of the first MSC of a control region based on the movement of the first MT in the control region of the first MSC.

Claim 3

In a method for performing a handover between MSC in an IMT-2000 network system comprising a RAN(Radio Access Network) including first and second MT(Mobile Terminal), first and second BTS(Base Terminal Station) for controlling first and second MT connected with the first and second MT based on a wireless connection for thereby controlling the first and second MT so that a radio environment is optimized, a CN(Core Network) connected with a VLR(Visited Location Register) and a HLR/GLR(Home Location Register/Gateway Location Register) for registering and managing a subscriber position information and including first through third MSC(Mobile Switching Center) for transferring and exchanging a radio resource by managing and controlling the first and second RNC in the RAN for thereby performing a high speed transfer function and exchange function with respect to the multimedia service, and an IN(Intelligent Network) including a SCP (Service Data Point) provided with a service control logic and an IP(Intelligent Peripheral) provided with a SDP (Service Data Point) having a data for performing a service and a service resource for thereby providing various multimedia services, an improved handover method between MSC using an intelligent network comprising the steps of: a first step in which the SCP of a corresponding IN requests a handover to the third MSC after the SSF of the first MSC requests a handover of the first MT to the SCP of the IN when the first MT requests a handover to the first MSC of a control region based on the movement of the first MT in the control region of the first MSC; a second step in which the CCF of the third MSC disconnects the connection with the first MSC in accordance with a handover request of the IN in the first step for thereby changing a routing table, setting a new connection with the second MSC and performing a handover between the MSC; and a third step in which the third MSC informs the SCP of the IN of a result of the handover operation when the handover is successfully completed in the second step and the SCP of the IN which receives the information informs the first MSC of a result of the handover.

Claim 4

In a method for performing a handover between MSC in an IMT-2000 network system comprising a RAN(Radio Access Network) including first and second MT(Mobile Terminal), first and second BTS(Base Terminal Station) for controlling first and second MT connected with the first and second MT based on a wireless connection for thereby controlling the first and second MT so that a radio environment is optimized, a CN(Core Network) connected with a VLR(Visited Location Register) and a HLR/GLR(Home Location Register/Gateway Location Register) for registering and managing a subscriber position information and including first through third MSC(Mobile Switching Center) for transferring and exchanging a radio resource by managing and controlling the first and second RNC in the RAN for thereby performing a high speed transfer function and exchange function with respect to the multimedia service, and an IN(Intelligent Network) including a SCP (Service Data Point) provided with a service control logic and an IP(Intelligent Peripheral) provided with a SDP (Service Data Point) having a data for performing a service and a service resource for thereby providing various multimedia services, an improved handover method between MSC using an intelligent network comprising the steps of: a first step in which the SCP of a corresponding IN requests a handover to the third MSC after the SSF of the first MSC requests a handover of the first MT to the SCP of the IN when the first MT requests a handover to the first MSC of a control region based on the movement of the first MT in the control region of the first MSC; a second step in which the CCF of the third MSC disconnects the connection with the first MSC in accordance with a handover request of the IN in the first step for thereby changing a routing table, setting a new connection with the second MSC and performing a handover between the MSC; and a third step in which the third MSC informs the SCP of the IN of a result of the handover operation when the handover is successfully completed in the second step and the SCP of the IN which receives the information informs the first MSC of a result of the handover.