Methods and apparatus for use in establishing session initiation protocol communications for virtual private networking

A mobile communication device, comprising:

• a wireless transceiver;
• one or more processors coupled to the wireless transceiver;
• memory;
• a communications application stored in the memory, the communications application being for communications which involve a session initiation protocol (SIP);
• the one or more processors being operative to:
• cause a request for a virtual private network (VPN) connection with a private network to be communicated through the wireless transceiver;
• refrain from registering with a SIP server for the communications using a public IP address assigned to the mobile communication device;
• if the VPN connection is established:
• receive, through the wireless transceiver, a private IP address assigned to the mobile communication device for the VPN connection;
• and
• cause a request for registration using the private IP address to be communicated to a SIP server of the private network through the wireless transceiver.

A method for use in establishing communications for a mobile communication device comprising:

• identifying an indication to refrain from requesting a session registration for the communications using a public IP address assigned to the mobile communication device;
• in response to identifying the indication, refraining from requesting the session registration using the public IP address;
• if a tunnel connection with a private network is established for the mobile communication device:
• receiving a private IP address associated with the tunnel connection with the private network;
• and
• causing a request for session registration using the private IP address to be communicated to a session initiation server.

A mobile communication device, comprising:

• a wireless transceiver;
• one or more processors coupled to the wireless transceiver;
• memory;
• a communications application stored in the memory, the communications application being for communications which involve a session protocol;
• the one or more processors being operative to:
• identify an indication to refrain from requesting a session registration using a public IP address assigned to the mobile communication device;
• in response to identifying the indication, refrain from requesting the session registration using the public IP address;
• if a tunnel connection with a private network is established for the mobile communication device:
• receive, through the wireless transceiver, a private IP address associated with a tunnel connection with a private network;
• and
• cause a request for session registration using the private IP address to be communicated to a session initiation server through the wireless transceiver.

A method for use in establishing communications which involve a session protocol for a mobile communication device, the method comprising the acts of:

• producing an indication to refrain from requesting a session registration for the communications using a public IP address assigned to the mobile communication device;
• causing a request for a tunnel connection to be communicated for establishing a tunnel connection with a private network;
• if the tunnel connection is established:
• receiving a private IP address associated with the tunnel connection and assigned to the mobile communication device;
• and
• producing. an indication to request a session registration using the private IP address received for the tunnel connection.

A mobile communication device, comprising:

• a wireless transceiver;
• one or more processors coupled to the wireless transceiver;
• memory;
• a communications application stored in the memory, the communications application being for communications which involve a session protocol;
• the one or more processors being operative to:
• identify an indication to refrain from requesting a session registration for the communications using a public IP address assigned to the mobile communication device;
• in response to identifying the indication, refrain from requesting the session registration using the public IP address;
• if a tunnel connection with a private network is established for the mobile communication device:
• receive, through the wireless transceiver, a private IP address associated with the tunnel connection with the private network;
• and
• cause a request for session registration using the private IP address to be communicated to a session server through the wireless transceiver.