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

• US 6,529,490 B1
• Filed: 03/25/1999
• Issued: 03/04/2003
• Est. Priority Date: 03/26/1998
• Status: Expired due to Term

• Current Assignee: Yamazaki Holdings LLC (Intellectual Ventures LLC)
• Original Assignee: Hyundai Electronics Industries Co. Ltd. (SK Hynix Inc.)
• Inventors: Oh, Se-Jong, Park, Jae-Hong, Yang, Shin-Hyun
• Primary Examiner(s): Le; Thanh Cong
• Assistant Examiner(s): CHOW, CHARLES CHIANG
• Application Number:
  US09/276,301
• Time in Patent Office: 1,440 Days
• Field of Search: 370/331,360,386,329,338,401 455/414,463,461,405 379/209.01,58,60
• US Class Current: 370/331
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1053 IP private branch exchange [PBX] functionality entities or arrangements circuit switched PBXs H04M3/00
• CPC Class Codes: H04Q 2213/13098 Mobile subscriber
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/1332 Logic circuits
• CPC Class Codes: H04Q 2213/13345 Intelligent networks, SCP
• CPC Class Codes: H04Q 3/0045 involving hybrid, i.e. a mixture of public and private, or multi-vendor systems
• CPC Class Codes: H04Q 3/0058 using service-independent building blocks (SIBBs) or "primitives"
• CPC Class Codes: H04W 36/12 Reselecting a serving backbone network switching or routing node
• CPC Class Codes: H04W 36/125 involving different types of service backbones

Abstract

A handover method between mobile switching centers using an intelligent network and an IMT-2000 network system adapting the same are disclosed. The system includes 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, and a plurality of 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 for thereby decreasing the consumption of a transfer resource by performing a handover between the MSC using an IN of an IMT-2000 network system.

Claims

1. 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.

2. 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.