Patents by Inventor Anal SRIVASTAVA

Anal SRIVASTAVA 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).

  • Publication number: 20240031879
    Abstract: A method is provided for avoiding context transfers by a first Access and Mobility Management Function (AMF) connected to a first gNB to a second AMF when a user equipment (UE) in idle mode moves from the first gNB to a second gNB. The method may include provisioning the first AMF and the second AMF with the same tracking area identity (TAI), the first AMF and the second AMF s being connected to a respective enterprise gNB. The method may also include configuring the 5G packet core network comprising a session management function (SMF) in communications with the first AMF and the second AMF, to avoid transferring a UE context from the first AMF to the second AMF when the user equipment (UE) in the idle mode moves from a first AMF to the second AMF. The UE context remains with the first AMF.
    Type: Application
    Filed: October 3, 2023
    Publication date: January 25, 2024
    Inventors: Anal Srivastava, Sangram Kishore Lakkaraju
  • Patent number: 11825361
    Abstract: A target Access and Mobility Management Function (AMF) switches the path for network traffic to a User Equipment (UE) in an inter-AMF mobility event. The target AMF obtains a path switch request from a target next generation Node B (gNB). The path switch request includes a UE identifier and a source AMF identifier. The target AMF compares the source AMF identifier with a target AMF identifier, and responsive to a determination that the source AMF identifier is different than the target AMF identifier, the target AMF provides a UE context transfer request to the source AMF. The target AMF obtains the UE context from the source AMF and processes the path switch request to update a core network path for a session of the UE. The target AMF also provides a path switch response to the target gNB.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: November 21, 2023
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Anal Srivastava, Sangram Kishore Lakkaraju
  • Patent number: 11800346
    Abstract: A first access and mobility management function (AMF) in a network receives, from user equipment (UE), a registration request listing a first network slice and a second network slice. Upon determining that the first AMF supports the first, but not the second, network slice, the first AMF causes selection of (i) the first AMF as a session and mobility management (SM)-AMF to perform mobility management, and first session management signaling for the first network slice; and (ii) a second AMF as a session management only (SO)-AMF to perform only second session management signaling for the second network slice. The first AMF, acting as SM-AMF, performs the first session management signaling for a first data session on the first network slice, while the second AMF, acting as SO-AMF, performs only the second session management signaling for a second data session on the second network slice.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: October 24, 2023
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Vimal Srivastava, Sangram Kishore Lakkaraju, Anal Srivastava, Srinath Gundavelli
  • Patent number: 11785509
    Abstract: A method is provided for avoiding context transfers by a first Access and Mobility Management Function (AMF) connected to a first gNB to a second AMF when a user equipment (UE) in idle mode moves from the first gNB to a second gNB. The method may include provisioning the first AMF and the second AMF with the same tracking area identity (TAI), the first AMF and the second AMF s being connected to a respective enterprise gNB. The method may also include configuring the 5G packet core network comprising a session management function (SMF) in communications with the first AMF and the second AMF, to avoid transferring a UE context from the first AMF to the second AMF when the user equipment (UE) in the idle mode moves from a first AMF to the second AMF. The UE context remains with the first AMF.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: October 10, 2023
    Assignee: Cisco Technology, Inc.
    Inventors: Anal Srivastava, Sangram Kishore Lakkaraju
  • Patent number: 11665594
    Abstract: In one example embodiment, a server obtains a first indication of a first identifier associated with a user equipment in a wireless network, and first telemetry data associated with the first indication. The server obtains, from a network entity including a base station entity serving wireless communication in the wireless network, a second indication of the first identifier and second telemetry data associated with the second indication. The server determines that the first indication and the second indication match. In response to determining that the first indication and the second indication match, the server correlates the first telemetry data and the second telemetry data.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: May 30, 2023
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Shailender Potharaju, Rajesh S. Pazhyannur, Anal Srivastava
  • Publication number: 20230156532
    Abstract: A method is provided for avoiding context transfers by a first Access and Mobility Management Function (AMF) connected to a first gNB to a second AMF when a user equipment (UE) in idle mode moves from the first gNB to a second gNB. The method may include provisioning the first AMF and the second AMF with the same tracking area identity (TAI), the first AMF and the second AMF s being connected to a respective enterprise gNB. The method may also include configuring the 5G packet core network comprising a session management function (SMF) in communications with the first AMF and the second AMF, to avoid transferring a UE context from the first AMF to the second AMF when the user equipment (UE) in the idle mode moves from a first AMF to the second AMF. The UE context remains with the first AMF.
    Type: Application
    Filed: November 18, 2021
    Publication date: May 18, 2023
    Inventors: Anal Srivastava, Sangram Kishore Lakkaraju
  • Publication number: 20230143182
    Abstract: A target Access and Mobility Management Function (AMF) switches the path for network traffic to a User Equipment (UE) in an inter-AMF mobility event. The target AMF obtains a path switch request from a target next generation Node B (gNB). The path switch request includes a UE identifier and a source AMF identifier. The target AMF compares the source AMF identifier with a target AMF identifier, and responsive to a determination that the source AMF identifier is different than the target AMF identifier, the target AMF provides a UE context transfer request to the source AMF. The target AMF obtains the UE context from the source AMF and processes the path switch request to update a core network path for a session of the UE. The target AMF also provides a path switch response to the target gNB.
    Type: Application
    Filed: November 8, 2021
    Publication date: May 11, 2023
    Inventors: Anal Srivastava, Sangram Kishore Lakkaraju
  • Publication number: 20220417726
    Abstract: A first access and mobility management function (AMF) in a network receives, from user equipment (UE), a registration request listing a first network slice and a second network slice. Upon determining that the first AMF supports the first, but not the second, network slice, the first AMF causes selection of (i) the first AMF as a session and mobility management (SM)-AMF to perform mobility management, and first session management signaling for the first network slice; and (ii) a second AMF as a session management only (SO)-AMF to perform only second session management signaling for the second network slice. The first AMF, acting as SM-AMF, performs the first session management signaling for a first data session on the first network slice, while the second AMF, acting as SO-AMF, performs only the second session management signaling for a second data session on the second network slice.
    Type: Application
    Filed: June 25, 2021
    Publication date: December 29, 2022
    Inventors: Vimal Srivastava, Sangram Kishore Lakkaraju, Anal Srivastava, Srinath Gundavelli
  • Patent number: 11483750
    Abstract: An enterprise private network includes a simplified Third Generation Partnership Project (3GPP) core architecture for interworking between an Evolved Packet System (EPS) and a Fifth Generation (5G) system (5GS). The architecture includes an Evolved Packet Core (EPC) control plane (CP) (EPC CP) unit and a 5G core (5GC) CP (5GC CP) unit. The 5GC CP unit receives, from the EPC CP unit via an N26 interface, a message indicating a forward relocation request responsive to an indication of a handover of a Packet Data Network (PDN) connection at a user plane node from the EPS to the 5GS. The 5GC CP node establishes a Protocol Data Unit (PDU) session corresponding to the PDN connection based on PDN connection information in the message, which includes establishing a Quality of Service (QoS) Flow corresponding to an EPS bearer, and manages the PDU session at the user plane node.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: October 25, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Anal Srivastava, Srinath Gundavelli, Oliver James Bull, Vimal Srivastava
  • Publication number: 20220330122
    Abstract: An enterprise private network includes a simplified Third Generation Partnership Project (3GPP) core architecture for interworking between an Evolved Packet System (EPS) and a Fifth Generation (5G) system (5GS). The architecture includes an Evolved Packet Core (EPC) control plane (CP) (EPC CP) unit and a 5G core (5GC) CP (5GC CP) unit. The 5GC CP unit receives, from the EPC CP unit via an N26 interface, a message indicating a forward relocation request responsive to an indication of a handover of a Packet Data Network (PDN) connection at a user plane node from the EPS to the 5GS. The 5GC CP node establishes a Protocol Data Unit (PDU) session corresponding to the PDN connection based on PDN connection information in the message, which includes establishing a Quality of Service (QoS) Flow corresponding to an EPS bearer, and manages the PDU session at the user plane node.
    Type: Application
    Filed: April 7, 2021
    Publication date: October 13, 2022
    Inventors: Anal Srivastava, Srinath Gundavelli, Oliver James Bull, Vimal Srivastava
  • Patent number: 11166205
    Abstract: A radio access network (RAN) of a neutral host network (NHN) provides communications in a plurality of small cells, and is a shared resource with shared access by a plurality of mobile network operators (MNOs) via a multi-operator core network (MOCN). A base station maintains a neighbor list of small cell frequencies of neighboring small cells of a small cell, and broadcasts, to a user equipment (UE), a system information message which includes the neighbor list. The base station additionally maintains a plurality of operator-specific neighbor lists of one or more macro-cell frequencies of one or more neighboring macro-cells, where each such list is associated with a respective one of a plurality of macro-cellular networks of the MNOs. The base station transmits, to the UE, a message including a selected one of the operator-specific neighbor lists associated with an identified one of the mobile network operators of the UE.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 2, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Rajesh S. Pazhyannur, Shailender Potharaju, Anal Srivastava
  • Publication number: 20210168657
    Abstract: In one example embodiment, a server obtains a first indication of a first identifier associated with a user equipment in a wireless network, and first telemetry data associated with the first indication. The server obtains, from a network entity including a base station entity serving wireless communication in the wireless network, a second indication of the first identifier and second telemetry data associated with the second indication. The server determines that the first indication and the second indication match. In response to determining that the first indication and the second indication match, the server correlates the first telemetry data and the second telemetry data.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 3, 2021
    Inventors: Shailender Potharaju, Rajesh S. Pazhyannur, Anal Srivastava
  • Publication number: 20210160743
    Abstract: A radio access network (RAN) of a neutral host network (NHN) provides communications in a plurality of small cells, and is a shared resource with shared access by a plurality of mobile network operators (MNOs) via a multi-operator core network (MOCN). A base station maintains a neighbor list of small cell frequencies of neighboring small cells of a small cell, and broadcasts, to a user equipment (UE), a system information message which includes the neighbor list. The base station additionally maintains a plurality of operator-specific neighbor lists of one or more macro-cell frequencies of one or more neighboring macro-cells, where each such list is associated with a respective one of a plurality of macro-cellular networks of the MNOs. The base station transmits, to the UE, a message including a selected one of the operator-specific neighbor lists associated with an identified one of the mobile network operators of the UE.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 27, 2021
    Inventors: Rajesh S. Pazhyannur, Shailender Potharaju, Anal Srivastava
  • Patent number: 9389993
    Abstract: A method is provided in one embodiment and includes receiving a request for a session at a network element; communicating a query for whitelist data to a provisioning element; receiving the whitelist data at the network element; and communicating a message to an access point that communicated the request, where the message is indicative of whether the session is to be accepted or denied based on the whitelist data. In more specific implementations, the network element is a gateway configured to receive the whitelist data via a RADIUS access accept message. In addition, source Internet protocol (IP) address verification associated with the session can be executed before a wireless device associated with the access point is permitted access to a network.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: July 12, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Anton Okmyanskiy, Mickael Graham, Eric Hamel, Anal Srivastava
  • Patent number: 8599792
    Abstract: A femto gateway maintains information about the location of femto cells and areas served by mobile switching centers. The gateway maintains a mapping so that it selects a desired mobile switching center (MSC) and SGSN that is likely to be used if the user equipment leaves the coverage area of the femto cell and enters a macro cell or vice versa.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: December 3, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Anand Oswal, Anal Srivastava, Mahavir Karnavat, Sandeep Gautam
  • Publication number: 20110069673
    Abstract: A femto gateway enables local routing of voice calls for users communicating through the same femto gateway, without passing through a mobile switching center. Local routing reduces costly switching of calls, and can provide better quality of service and more innovative service plans to subscribers.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 24, 2011
    Applicant: STARENT NETWORKS, CORP
    Inventors: Anand OSWAL, Anal SRIVASTAVA, Mahavir KARNAVAT, Sandeep GAUTAM
  • Publication number: 20110069674
    Abstract: A femto gateway maintains information about the location of femto cells and areas served by mobile switching centers. The gateway maintains a mapping so that it selects a desired mobile switching center (MSC) and SGSN that is likely to be used if the user equipment leaves the coverage area of the femto cell and enters a macro cell or vice versa.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 24, 2011
    Applicant: STARENT NETWORKS, CORP
    Inventors: Anand OSWAL, Anal SRIVASTAVA, Mahavir KARNAVAT, Sandeep GAUTAM