Call control apparatus, call processing continuation method and call control program

Patent metadata

Field	Value
Publication number	US-11825017-B2
Application number	US-202017800158-A
Country	US
Kind code	B2
Filing date	Feb 21, 2020
Priority date	Feb 21, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

An IA server includes a plurality of execution units that execute respective virtual machines of a plurality of disaster recovery stations corresponding one-to-one to a plurality of active stations. The plurality of disaster recovery stations includes a virtualized call control server that performs call processing when an active station is not operating, and a control unit that controls an operation of the virtual machines. The control unit activates, at normal times, the virtual machines, and deactivates, when any active station of the plurality of active stations is not operating, a virtual machine of a disaster recovery station of the plurality of disaster recovery stations other than a virtual machine of a disaster recovery station of the plurality of disaster recovery stations corresponding to the active station not operating, and operates only the virtual machine of the disaster recovery station corresponding to the active station not operating.

First claim

The invention claimed is:

1. A call control apparatus that operates as an extra call control apparatus inside of one hardware apparatus, comprising:
one or more processors configured to:
execute respective virtual machines of a plurality of disaster recovery stations corresponding one-to-one to a plurality of active stations including a call control server configured to perform call processing at normal times, the plurality of disaster recovery stations including a virtualized call control server configured to perform call processing when an active station of the plurality of active stations is not operating; and
control an operation of the virtual machines of the plurality of disaster recovery stations, wherein
the one or more processors are further configured to activate, at normal times, the virtual machines of the plurality of disaster recovery stations corresponding one-to-one to the plurality of active stations inside of the one hardware apparatus, deactivate, when any active station of the plurality of active stations is not operating, a virtual machine of a disaster recovery station of the plurality of disaster recovery stations other than a virtual machine of a disaster recovery station of the plurality of disaster recovery stations corresponding to the active station not operating, and operate only the virtual machine of the disaster recovery station corresponding to the active station not operating, and
at normal times, each of the virtual machines of the plurality of disaster recovery stations configured to repeatedly receive data related to call processing from a corresponding active station of the plurality of active stations at a predetermined timing,

wherein the virtual machine of the disaster recovery station includes a plurality of pairs of call control servers in a cluster configuration including a virtualized active system call control server and a virtualized standby system call control server.

2. The call control apparatus according to claim 1 , wherein
the one or more processors are configured to allocate, at normal times, a predetermined amount of available resource to each of the virtual machines of the plurality of disaster recovery stations, release, when an active station of the plurality of active stations is not operating, an amount of available resource allocated to the virtual machine of the disaster recovery station other than the virtual machine of the disaster recovery station corresponding to the active station not operating, and increase an amount of available resource to be allocated to the virtual machine of the disaster recovery station corresponding to the active station not operating.

3. A call processing continuation method performed by an extra call control apparatus that operates inside of one hardware apparatus,
the extra call control apparatus including:
one or more processors configured to:
execute respective virtual machines of a plurality of disaster recovery stations corresponding one-to-one to a plurality of active stations including a call control server configured to perform call processing at normal times, the plurality of disaster recovery stations including a virtualized call control server configured to perform call processing when an active station of the plurality of active stations is not operating; and
control an operation of the virtual machines of the plurality of disaster recovery stations,
the call processing continuation method comprising:
activating, at normal times, the virtual machines of the plurality of disaster recovery stations corresponding one-to-one to the plurality of active stations inside of the one hardware apparatus;
by each of the virtual machines of the plurality of disaster recovery stations, repeatedly receiving, at normal times, data related to call processing from a corresponding active station of the plurality of active stations at a predetermined timing; and
deactivating, when any active station of the plurality of active stations is not operating, a virtual machine of a disaster recovery station of the plurality of disaster recovery stations other than a virtual machine of a disaster recovery station of the plurality of disaster recovery stations corresponding to the active station not operating, and operating only the virtual machine of the disaster recovery station corresponding to the active station not operating,
wherein the virtual machine of the disaster recovery station includes a plurality of pairs of call control servers in a cluster configuration including a virtualized active system call control server and a virtualized standby system call control server.

4. A non-transitory computer readable medium program, causing a computer to operate as the call control apparatus according to claim 1 .

5. A non-transitory computer readable medium program, causing a computer to operate as the call control apparatus according to claim 2 .

Assignees

• Nippon Telegraph & Telephone

Inventors

• TODA Takato
• Kimura Nobuhiro
• Sakuma Minoru
• Mihara Kotaro

Classifications

• H04M3/2254 Primary

  in networks · CPC title

• H04M3/24

  with provision for checking the normal operation · CPC title

• H04M11/04

  with alarm systems, e.g. fire, police or burglar alarm systems · CPC title

• G06F11/20

  using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements · CPC title

• H04L47/00

  Traffic control in data switching networks (arrangements for detecting or preventing errors in the information received H04L1/00) · CPC title