Patents by Inventor Fereidoun Tafreshi

Fereidoun Tafreshi 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).

  • Patent number: 10602522
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 24, 2020
    Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLC
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Publication number: 20180324781
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Application
    Filed: June 26, 2018
    Publication date: November 8, 2018
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Patent number: 10034291
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: July 24, 2018
    Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLC
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Publication number: 20160157220
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Application
    Filed: February 9, 2016
    Publication date: June 2, 2016
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Patent number: 9288807
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: March 15, 2016
    Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLC
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Patent number: 9198049
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless communications network. RAN topology can be adapted based on analysis of real-time load conditions of RAN base stations. Analysis of the load conditions of RAN base stations can be performed in a core-network of a wireless carrier rather than distributing the analysis to RAN-side elements. Analysis can be based on receiving real-time load information relating to key performance indicators such as X2 load, S1 load, instant outbound handover count, instant inbound handover count, etc. Further, analysis can include the application of predetermined rules relating to preferential performance of the base stations. This can facilitate ranking neighboring base stations, adding new base stations, deleting base stations, black/white listing base stations, etc., in neighbor relations data structures, such as automatic neighbor relations structures for self-organizing networks, e.g., eNodeBs in LTE networks.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: November 24, 2015
    Assignee: AT&T MOBILITY II LLC
    Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
  • Patent number: 9125090
    Abstract: In order to provide load balancing in a wireless network that includes a cell with two or more carriers, sequential service requests for radio resources are allocated to respective ones of the two or more carriers in a staggered manner (i.e., a round robin, or least recently used (LRU) approach). In an embodiment, the sequential requests are directed so as to allocate channelization codes of respective code trees associated with the two or more carriers substantially equally. The signal strength of a carrier may be checked prior to allocation. Trigger conditions may be checked prior to allocating a request to a carrier using the LRU approach. The trigger conditions may include power utilization of a first carrier compared to a second carrier, channelization code tree offset between two or more code trees respectively associated with the two or more carriers, and/or average bit rate per subscriber load of the carriers.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: September 1, 2015
    Assignee: AT&T Mobility II LLC
    Inventors: Fereidoun Tafreshi, Arthur R. Brisebois
  • Publication number: 20150156641
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless communications network. RAN topology can be adapted based on analysis of real-time load conditions of RAN base stations. Analysis of the load conditions of RAN base stations can be performed in a core-network of a wireless carrier rather than distributing the analysis to RAN-side elements. Analysis can be based on receiving real-time load information relating to key performance indicators such as X2 load, S1 load, instant outbound handover count, instant inbound handover count, etc. Further, analysis can include the application of predetermined rules relating to preferential performance of the base stations. This can facilitate ranking neighboring base stations, adding new base stations, deleting base stations, black/white listing base stations, etc., in neighbor relations data structures, such as automatic neighbor relations structures for self-organizing networks, e.g., eNodeBs in LTE networks.
    Type: Application
    Filed: February 20, 2015
    Publication date: June 4, 2015
    Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
  • Publication number: 20150133142
    Abstract: Cluster-based optimization of antenna tilts in a wireless network and other related aspects are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Application
    Filed: January 22, 2015
    Publication date: May 14, 2015
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Patent number: 8996000
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless communications network. RAN topology can be adapted based on analysis of real-time load conditions of RAN base stations. Analysis of the load conditions of RAN base stations can be performed in a core-network of a wireless carrier rather than distributing the analysis to RAN-side elements. Analysis can be based on receiving real-time load information relating to key performance indicators such as X2 load, S1 load, instant outbound handover count, instant inbound handover count, etc. Further, analysis can include the application of predetermined rules relating to preferential performance of the base stations. This can facilitate ranking neighboring base stations, adding new base stations, deleting base stations, black/white listing base stations, etc., in neighbor relations data structures, such as automatic neighbor relations structures for self-organizing networks, e.g., eNodeBs in LTE networks.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: March 31, 2015
    Assignee: AT&T Mobility II LLC
    Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
  • Patent number: 8971302
    Abstract: Systems, methods, and apparatus for cluster-based optimization of antenna tilts in a wireless network are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: March 3, 2015
    Assignees: AT&T Mobility II LLC, AT&T Intellectual Property I, L.P.
    Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
  • Patent number: 8880090
    Abstract: System(s), method(s), and device(s) that enable release of backhaul capacity associated with base stations are presented. During soft handover, a communication device can have its connection maintained with more than one base station. A link controller component can identify a radio link having the highest quality and can determine the relative backhaul load of each base station communicating with the communication device. The link controller component determines whether the base station having the highest radio link quality is experiencing the heaviest backhaul load relative to the other base stations. If the base station with the highest link quality does not also have the heaviest backhaul load, the link controller component identifies the base station having the heaviest backhaul load and the identified base station can have its status modified with respect to the communication device for a desired period of time, in accordance with predefined status modification criteria.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: November 4, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Fereidoun Tafreshi
  • Publication number: 20140162682
    Abstract: Systems and methods for overshooting cell device detection for application to self optimizing network algorithms are disclosed herein. The system ranks neighbor relationships between first, second, and third cell devices in a cellular network, based on handover statistics directly received from the cellular network. The system thereafter identifies one of the second cell device or the third cell device as an outlier neighbor cell device based on a ranking of the neighbor relationships and identifies, as a function of an azimuth direction and a distance between respective cell devices of a group of screened cell devices, an overshooting cell device that propagates a transmitted radio frequency signal causing interference to a cell device included in the group of screened cell devices.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 12, 2014
    Applicants: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLC
    Inventors: Fereidoun Tafreshi, Srikanth Hariharan, Vibhav Kapnadak, Hyun Ok Lee, Xiaojun Tang
  • Publication number: 20140073304
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless network. Base station coverage areas can be determined by distance analysis of detected neighbor base stations. This can be in response to determination of a physical cell identifier (PCI) conflict condition. When a PCI conflict is determined, a unique identifier for each base station can be employed to facilitate determining location information for the base stations. Location information can be employed to determine distance-based characteristics that can facilitate adaptation of wireless network neighbor relations to adapt the RAN coverage area topology. Distance-based characteristics can include nearest neighbor, proximity to a predetermined distance, etc. Additionally, PCI information can be updated to correct the PCI conflict condition.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Applicant: AT&T MOBILITY II LLC
    Inventors: Arthur Richard Brisebois, Thomas W. Henderson, Fereidoun Tafreshi
  • Publication number: 20140073303
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless communications network. RAN topology can be adapted based on analysis of historical performance of base stations. Analysis of the historical performance of base stations can be performed in the core-network of a wireless carrier rather than distributing the analysis to RAN elements. Analysis can be based on receiving historical information relating to key performance indicators such as call failure rate, call success rate, handover attempt count, handover attempt failure count, etc. Further, analysis can include the application of predetermined rules relating to preferential performance of the base stations. This can facilitate ranking neighboring base stations, adding new base stations, deleting base stations, black/white listing base stations, etc., in neighbor relations data structures, such as automatic neighbor relations structures for self-organizing networks, e.g., eNodeBs in LTE networks.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Applicant: AT&T MOBILITY II LLC
    Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
  • Publication number: 20140073322
    Abstract: Adjusting RAN performance by adapting cell coverage area can help optimize a wireless communications network. RAN topology can be adapted based on analysis of real-time load conditions of RAN base stations. Analysis of the load conditions of RAN base stations can be performed in a core-network of a wireless carrier rather than distributing the analysis to RAN-side elements. Analysis can be based on receiving real-time load information relating to key performance indicators such as X2 load, S1 load, instant outbound handover count, instant inbound handover count, etc. Further, analysis can include the application of predetermined rules relating to preferential performance of the base stations. This can facilitate ranking neighboring base stations, adding new base stations, deleting base stations, black/white listing base stations, etc., in neighbor relations data structures, such as automatic neighbor relations structures for self-organizing networks, e.g., eNodeBs in LTE networks.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Applicant: AT&T MOBILITY II LLC
    Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
  • Publication number: 20140071856
    Abstract: Adjusting radio area network performance by adapting cell coverage area can help optimize the operating efficiency of a wireless network. Base station coverage areas can be determined by analysis of reported timing advance information. This can facilitate adjusting coverage areas. Further, integration with network topology planning components and management components can be employed. Moreover, prioritization of base stations in Automatic Neighbor Relations (ANR) neighbor lists can improve coverage balance by influencing complex heterogeneous coverage layout systems. Historical timing advance information can be employed to facilitate analysis of statistical coverage conditions for cells, analysis of coverage areas as they relate to performance metrics, analysis of coverage areas with regard to specific event such as handovers, etc. Moreover, coverage area analysis can be linked to alarm systems.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Applicant: AT&T MOBILITY II LLC
    Inventors: Arthur Richard Brisebois, Thomas W. Henderson, Fereidoun Tafreshi
  • Publication number: 20130142183
    Abstract: Systems, methods, and apparatus for cluster-based optimization of antenna tilts in a wireless network are presented herein. A screening component can receive information indicating wireless conditions of respective wireless access points of a geographical region, select, based on a performance criterion, an access point of the respective wireless access points, and group the access point and an other access point of the respective wireless access points into a representation of a cluster of access points. Further, an optimization component can derive antenna tilt values for respective access points of the cluster of the access points in response to a simulation of an application of the antenna tilt values to the respective access points. Furthermore, an implementation component can direct the antenna tilt values to respective components of the respective access points.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 6, 2013
    Applicants: AT&T INTELLECTUAL PROPERTY I, LP, AT&T MOBILITY II LLC
    Inventors: Hyun Ok Lee, Vibhav Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tsui, Gustavo Enrique Ulffe Whu
  • Publication number: 20120294179
    Abstract: System(s), method(s), and device(s) that enable release of backhaul capacity associated with base stations are presented. During soft handover, a communication device can have its connection maintained with more than one base station. A link controller component can identify a radio link having the highest quality and can determine the relative backhaul load of each base station communicating with the communication device. The link controller component determines whether the base station having the highest radio link quality is experiencing the heaviest backhaul load relative to the other base stations. If the base station with the highest link quality does not also have the heaviest backhaul load, the link controller component identifies the base station having the heaviest backhaul load and the identified base station can have its status modified with respect to the communication device for a desired period of time, in accordance with predefined status modification criteria.
    Type: Application
    Filed: July 27, 2012
    Publication date: November 22, 2012
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: Fereidoun Tafreshi
  • Patent number: 8254949
    Abstract: System(s), method(s), and device(s) that enable release of backhaul capacity associated with base stations are presented. During soft handover, a communication device can have its connection maintained with more than one base station. A link controller component can identify a radio link having the highest quality and can determine the relative backhaul load of each base station communicating with the communication device. The link controller component determines whether the base station having the highest radio link quality is experiencing the heaviest backhaul load relative to the other base stations. If the base station with the highest link quality does not also have the heaviest backhaul load, the link controller component identifies the base station having the heaviest backhaul load and the identified base station can have its status modified with respect to the communication device for a desired period of time, in accordance with predefined status modification criteria.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: August 28, 2012
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Fereidoun Tafreshi