Patents by Inventor Alejandro A. Elizondo

Alejandro A. Elizondo 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).

  • Provision of short message services
    Patent number: 6917813
    Abstract: This invention relates to a method and apparatus to provide Short Message Services (SMS) provisioning when different SS7 signaling networks are in use. The method can be used when mobile units are roaming in a SS7 network different than the MS home network, and when the MS is roaming inside or outside of its SS7 type of network. The HLR, which includes a memory for storing a database of point code schemes and country codes, also stores all location data for the MSC including the SMS Address and the MSCIN. The HLR analyzes the SMS Address to determine the nationality of the MSC. The HLR compares the MSC's REGNOT point code and MSCIN country code with the country code in the MC's SMSREQ calling party address to determine whether the MC and MSC point codes are the same. If they are the same, the smsreq is populated with the common point code from the SMS Address. If not the same, the smsreq is populated with the MSCIN parameter.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: July 12, 2005
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Alejandro A. Elizondo
  • Method for conducting handoff back to anchor communication scenarios
    Patent number: 6577867
    Abstract: A method which supports Mobile Station (MS) handoff back operations across tandem switches makes use of a modification to the ANSI-41 Standard. The method includes the steps of determining that a handoff back call connection operation to a Target Mobile Switching Center (involved in the call path and not directly connected to the Serving Mobile Switching Center) should occur, verifying that the Target Mobile Switching Center (Target MSC) is also the Anchor MSC, verifying that a designated channel of the Target MSC is available to support the MS, and moving the MS directly to the designated channel. The address of the Anchor MSC is obtained using the MSCID contained within the BillingID parameter of a FacilitiesDirective message received by the tandem MSC directly connected to the serving MSC prior to initiating the handoff back operation.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: June 10, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Alejandro A. Elizondo
  • Provision of short message services
    Publication number: 20020183081
    Abstract: This invention relates to a method and apparatus to provide Short Message Services (SMS) provisioning when different SS7 signaling networks are in use. The method can be used when mobile units are roaming in a SS7 network different than the MS home network, and when the MS is roaming inside or outside of its SS7 type of network.
    Type: Application
    Filed: May 31, 2001
    Publication date: December 5, 2002
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Alejandro A. Elizondo Alvarez