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: 10602522Abstract: 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: GrantFiled: June 26, 2018Date of Patent: March 24, 2020Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLCInventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Publication number: 20180324781Abstract: 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: ApplicationFiled: June 26, 2018Publication date: November 8, 2018Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Patent number: 10034291Abstract: 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: GrantFiled: February 9, 2016Date of Patent: July 24, 2018Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLCInventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Publication number: 20160157220Abstract: 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: ApplicationFiled: February 9, 2016Publication date: June 2, 2016Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Patent number: 9288807Abstract: 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: GrantFiled: January 22, 2015Date of Patent: March 15, 2016Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLCInventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Patent number: 9198049Abstract: 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: GrantFiled: February 20, 2015Date of Patent: November 24, 2015Assignee: AT&T MOBILITY II LLCInventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
-
Patent number: 9125090Abstract: 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: GrantFiled: February 27, 2009Date of Patent: September 1, 2015Assignee: AT&T Mobility II LLCInventors: Fereidoun Tafreshi, Arthur R. Brisebois
-
Publication number: 20150156641Abstract: 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: ApplicationFiled: February 20, 2015Publication date: June 4, 2015Inventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
-
Publication number: 20150133142Abstract: 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: ApplicationFiled: January 22, 2015Publication date: May 14, 2015Inventors: Hyun Ok Lee, Vibhav Arun Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tinyork Tsui, Gustavo Enrique Ulffe Whu
-
Patent number: 8996000Abstract: 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: GrantFiled: September 10, 2012Date of Patent: March 31, 2015Assignee: AT&T Mobility II LLCInventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
-
Patent number: 8971302Abstract: 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: GrantFiled: December 6, 2011Date of Patent: March 3, 2015Assignees: 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: 8880090Abstract: 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: GrantFiled: July 27, 2012Date of Patent: November 4, 2014Assignee: AT&T Intellectual Property I, L.P.Inventor: Fereidoun Tafreshi
-
Publication number: 20140162682Abstract: 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: ApplicationFiled: December 6, 2012Publication date: June 12, 2014Applicants: AT&T INTELLECTUAL PROPERTY I, L.P., AT&T MOBILITY II LLCInventors: Fereidoun Tafreshi, Srikanth Hariharan, Vibhav Kapnadak, Hyun Ok Lee, Xiaojun Tang
-
Publication number: 20140073304Abstract: 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: ApplicationFiled: September 10, 2012Publication date: March 13, 2014Applicant: AT&T MOBILITY II LLCInventors: Arthur Richard Brisebois, Thomas W. Henderson, Fereidoun Tafreshi
-
Publication number: 20140073303Abstract: 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: ApplicationFiled: September 10, 2012Publication date: March 13, 2014Applicant: AT&T MOBILITY II LLCInventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
-
Publication number: 20140073322Abstract: 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: ApplicationFiled: September 10, 2012Publication date: March 13, 2014Applicant: AT&T MOBILITY II LLCInventors: Thomas W. Henderson, Arthur Richard Brisebois, Fereidoun Tafreshi
-
Publication number: 20140071856Abstract: 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: ApplicationFiled: September 10, 2012Publication date: March 13, 2014Applicant: AT&T MOBILITY II LLCInventors: Arthur Richard Brisebois, Thomas W. Henderson, Fereidoun Tafreshi
-
Publication number: 20130142183Abstract: 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: ApplicationFiled: December 6, 2011Publication date: June 6, 2013Applicants: AT&T INTELLECTUAL PROPERTY I, LP, AT&T MOBILITY II LLCInventors: Hyun Ok Lee, Vibhav Kapnadak, Fereidoun Tafreshi, Xiaojun Tang, Ernest Tsui, Gustavo Enrique Ulffe Whu
-
Publication number: 20120294179Abstract: 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: ApplicationFiled: July 27, 2012Publication date: November 22, 2012Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventor: Fereidoun Tafreshi
-
Patent number: 8254949Abstract: 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: GrantFiled: December 23, 2009Date of Patent: August 28, 2012Assignee: AT&T Intellectual Property I, L.P.Inventor: Fereidoun Tafreshi