Mobile communication system and a method of incoming call restriction

• US 6,233,447 B1
• Filed: 07/29/1998
• Issued: 05/15/2001
• Est. Priority Date: 08/08/1997
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Tomoike, Hiroyuki
• Primary Examiner(s): LE, THANH C
• Application Number:
  US09/124,073
• Time in Patent Office: 1,021 Days
• Field of Search: 455/423, 455/424, 455/422, 455/410, 455/411, 455/426, 455/432, 455/433, 455/435, 455/445
• US Class Current: 455/411
• CPC Class Codes: H04W 4/00 Services specially adapted for wireless communication networks; Facilities therefor
• CPC Class Codes: H04W 48/06 based on traffic conditions
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Abstract

A mobile communication system which can restrict incoming calls to a mobile communication exchange in a traffic congestion state and can omit wasteful processing for connecting a path to a restricting exchange is provide. When a exchange has detected that it is the traffic congestion state, the exchange instruct this state to a location register to indicate that incoming calls to that exchange are to be restricted. When other exchange has received a call request to a mobile station, the exchange acquires information to the location register for the call. When it is found that the location information of the mobile station is the area which is controlled by the incoming call restricting exchange, a call processing for the call is interrupted.

Claims

1. A mobile communication system provided with at least one location register for managing mobile station information such as location information of each mobile station and subscriber information and a plurality of mobile communication exchanges for executing call connection processing by mutually communicating mobile station information with said location register via a common channel signaling network, wherein:

said location register comprising an incoming call restricting exchange information storage section for storing an exchange information showing a mobile communication exchange being under incoming call restricting state; and

said mobile communication exchange comprising a call processing section for acquiring a mobile station information including location information and incoming call restricting exchange information from said location register for a call being processed, and interrupting a call processing of said mobile communication exchange under incoming call restricting state based on said mobile station information and incoming call restricting exchange information.

2. A mobile communication system provided with at least one location register for managing mobile station information such as location information of each mobile station and subscriber information and a plurality of mobile communication exchanges for executing call connecting processing by mutually communicating mobile station information with said location register via a common channel signaling network, wherein:

said location register comprising an incoming call restricting exchange information storage section for storing an exchange information showing a mobile communication exchange being under incoming call restricting state; and

said mobile communication exchange comprising a traffic monitoring section for monitoring traffic state of own mobile communication exchange and instructing said location register to store the incoming call restricting exchange information when traffic state exceeding a predetermined value for rejecting incoming calls to mobile stations located in own control area, and an incoming call judging section for interrupting a call processing of said mobile communication exchange under incoming call restricting state based on said mobile station information and incoming call restricting exchange information from said location register.

3. A mobile communication system according to claim 2, wherein;

said incoming call judging section judging a call process to be denied when the mobile station being located in a control area of the mobile communication exchange indicated by the incoming call restricting exchange information.

4. A mobile communication system comprising:

at least one location register for managing mobile station information, such as location information of each mobile station and subscriber information, and storing an exchange information showing a mobile communication exchange being under incoming call restricting state;

a plurality of mobile communication exchanges for executing call connecting processing by mutually communicating mobile station information with said location register via a common channel signaling network, and each mobile communication exchange comprising;

a traffic monitoring section for monitoring traffic state of own mobile communication exchange and instructing said location register to store the incoming call restricting exchange information when traffic state exceeding a predetermined value for rejecting incoming calls to mobile stations located in own control area;

an incoming call judging section for interrupting a call processing of said mobile communication exchange under incoming call restricting state based on said mobile station information by acquiring result information including location information of the mobile station and incoming call restricting exchange information from said location register; and

a call processing section for interrupting call processing in accordance with a result of judgement of said incoming call judging section which has detected the mobile station being located in a control area of the mobile communication exchange indicated by the incoming call restricting exchange information.

5. A method of incoming call restriction for a mobile communication system provided with at least one location register for managing mobile station information such as location information of each mobile station and subscriber information and a plurality of mobile communication exchanges for executing call connecting processing by mutually communicating mobile station information with said location register via a common channel signaling network, said method comprising steps of:

storing incoming call restricting exchange information in said location register showing a mobile communication exchange which is under incoming call restricting state;

acquiring a mobile station information including location information and incoming call restricting exchange information from said location register when a call request being received; and

interrupting a call processing of said mobile communication exchange under incoming call restricting state based on said mobile station information and incoming call restricting state based on said mobile station information and incoming call restricting exchange information.

6. A method of incoming call restriction for a mobile communication system provided with at least one location register for managing mobile station information such as location information of each mobile station and subscriber information and a plurality of mobile communication exchanges for executing call connecting processing by mutually communicating mobile station information with said location register via a common channel signaling network, said method comprising steps of:

instructing said location register to store an incoming call restricting exchange information when traffic state of a mobile communication exchange exceeding a predetermined value for rejecting incoming calls to mobile stations located in own control area;

storing the incoming call restricting exchange information in said location register showing a mobile communication exchange being under incoming call restricting state;

acquiring information to said location register when a mobile communication exchange has received a call request to a mobile station;

judging whether a call to the mobile station being allowed or not by acquiring result information including location information of the mobile station and incoming call restricting exchange information from said location register; and

interrupting call processing when it has judged the mobile station being located in a control area of the mobile communication exchange indicated by the incoming call restricting exchange information.