Patents by Inventor Christopher R. Melus

Christopher R. Melus has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for delivering short message service (SMS) messages using the session initiation protocol (SIP)
    Patent number: 9888368
    Abstract: An Internet Protocol Multimedia Subsystem (IMS) network uses the Session Initiation Protocol (SIP) to provide communication services to mobile nodes. A short message service gateway (SMS-GW) in the IMS network receives a request to deliver a message to a mobile node. The SMS-GW determines whether the mobile node is IMS registered. If the mobile node is IMS registered, the SMS-GW may transmit a SIP MESSAGE request to a call session control function (CSCF) serving the mobile node in order to deliver the message to the mobile node. If the mobile node is SIP-capable but is not IMS registered, the SMS-GW may instead transmit a SIP MESSAGE request to the mobile node's IP address. To obtain the mobile node's IP address, the SMS-GW may query a domain name server (DNS) that stores associations between hostnames and IP addresses of mobile nodes.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: February 6, 2018
    Assignee: Sprint Spectrum L.P.
    Inventors: Lyle T. Bertz, William J. Routt, Ihab A. Guirguis, Ronald E. Lewis, Christopher R. Melus
  • Method and system for delivering short message service (SMS) messages using the session initiation protocol (SIP)
    Patent number: 9648473
    Abstract: An Internet Protocol Multimedia Subsystem (IMS) network uses the Session Initiation Protocol (SIP) to provide communication services to mobile nodes. A short message service gateway (SMS-GW) in the IMS network receives a request to deliver a message to a mobile node. The SMS-GW determines whether the mobile node is IMS registered. If the mobile node is IMS registered, the SMS-GW may transmit a SIP MESSAGE request to a call session control function (CSCF) serving the mobile node in order to deliver the message to the mobile node. If the mobile node is SIP-capable but is not IMS registered, the SMS-GW may instead transmit a SIP MESSAGE request to the mobile node's IP address. To obtain the mobile node's IP address, the SMS-GW may query a domain name server (DNS) that stores associations between hostnames and IP addresses of mobile nodes.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: May 9, 2017
    Assignee: Sprint Spectrum L.P.
    Inventors: Lyle T. Bertz, William J. Routt, Ihab A. Guirguis, Ronald E. Lewis, Christopher R. Melus
  • Method and system for delivering short message service (SMS) messages using the session initiation protocol (SIP)
    Patent number: 8543107
    Abstract: An Internet Protocol Multimedia Subsystem (IMS) network uses the Session Initiation Protocol (SIP) to provide communication services to mobile nodes. A short message service gateway (SMS-GW) in the IMS network receives a request to deliver a message to a mobile node. The SMS-GW determines whether the mobile node is IMS registered. If the mobile node is IMS registered, the SMS-GW may transmit a SIP MESSAGE request to a call session control function (CSCF) serving the mobile node in order to deliver the message to the mobile node. If the mobile node is SIP-capable but is not IMS registered, the SMS-GW may instead transmit a SIP MESSAGE request to the mobile node's IP address. To obtain the mobile node's IP address, the SMS-GW may query a domain name server (DNS) that stores associations between hostnames and IP addresses of mobile nodes.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: September 24, 2013
    Assignee: Sprint Spectrum L.P.
    Inventors: Lyle T. Bertz, William J. Routt, Ihab A. Guirguis, Ronald E. Lewis, Christopher R. Melus
  • Method and system for registering a mobile node via a registration proxy
    Patent number: 8442526
    Abstract: An application server provides communication services via a packet-switched network to mobile nodes based on their respective registrations in a registry, such as a home subscriber server (HSS) or domain name server (DNS). A registration proxy may be used to effect a registration in the registry on behalf of a mobile node when the mobile node lacks sufficient capability to effect the registration itself. The registration proxy may perform this function after receiving a notification that the mobile node is connected to the packet-switched network and after querying a capabilities server to determine that the mobile node lacks sufficient registration capability. To effect a registration in an HSS, the registration proxy may emulate either a serving call state control function (S-CSCF) or user equipment (UE).
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: May 14, 2013
    Assignee: Sprint Spectrum L.P.
    Inventors: Lyle T. Bertz, William J. Routt, Ihab A. Guirguis, Ronald E. Lewis, Christopher R. Melus