Kaitki Agarwal

US Patent:

8018955, Sep 13, 2011

Filed:

Dec 7, 2007

Appl. No.:

11/953000

Inventors:

Kaitki Agarwal - Westford MA, US
Rajat Ghai - Sandwich MA, US

Assignee:

Starent Networks LLC - Wilmington DE

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370401, 370235, 370236, 370310, 3703952, 37039521, 709228, 709231

Abstract:

Systems and methods for providing dynamic changes to a packet flow in a communication network are described. The dynamic changes can include upgrading and downgrading quality of service (QoS), adapting the stream to a receiving device, modifying the stream to counter-act changes in an air interface, and modifying the stream to accommodate an inter-technology handover. These changes can be provided by inspecting packets at a gateway and setting up a proxy for multimedia stream packet flows. The proxy can coordinate transcoding to take place to change the stream. The gateway can also monitor conditions at the mobile node using a real time control protocol or other applicable protocols.

US Patent:

8213913, Jul 3, 2012

Filed:

Dec 7, 2007

Appl. No.:

11/952956

Inventors:

Rajat Ghai - Sandwich MA, US
Kaitki Agarwal - Westford MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04M 3/42

US Classification:

4554142, 4554144, 4554323, 4554561, 4554562, 4554563, 707812, 707912, 707913, 707918

Abstract:

Systems and methods are provided that allow the delivery of location based services within a communication network. The location information can be retrieved using information from the mobile node when the mobile node registers in the network. The location information can then be cached or stored in one or more places in the communication network and correlated with the mobile node's addressing information. If a request for location based services is received without location based information, the gateway can use location based information regarding the mobile node to provide location based services. The gateway can enable non IMS mobile nodes to obtain IMS location based services or incompatible mobile nodes to obtain location based services.

US Patent:

8250634, Aug 21, 2012

Filed:

Dec 5, 2007

Appl. No.:

11/950682

Inventors:

Kaitki Agarwal - Westford MA, US
Rajat Ghai - Sandwich MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 29/00

US Classification:

726 5, 726 6, 726 7, 726 8, 726 9, 726 10

Abstract:

In some embodiments, a gateway in a communications network is provided including a subscriber interface and a Session Initiation Protocol (SIP) registrar; wherein the SIP registrar: receives a first register message as a result of a request associated with a user and a mobile device seeking network authentication; and sends a request for subscriber information to the subscriber interface; the subscriber interface: retrieves the subscriber information from the subscriber database; and sends the subscriber information to the SIP registrar; the SIP registrar further: sends challenge information including a password request and a request for predetermined response information previously selected by the user to the mobile device; receives a second register message including user response information in response to the challenge information; and authenticates the mobile device and the user based at least in part on whether the user response information matches the predetermined response information.

US Patent:

8300629, Oct 30, 2012

Filed:

Dec 7, 2007

Appl. No.:

11/952953

Inventors:

Kaitki Agarwal - Westford MA, US
Rajat Ghai - Sandwich MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/66
H04J 3/16

US Classification:

370352, 370465, 370466

Abstract:

Systems and methods for providing interaction management to network devices in a communication network are described. A gateway may be used to implement the interaction capabilities on packet flows for IP multimedia subsystem (IMS) and multimedia domain (MMD) architectures. Interaction managers and proxy agents can be provided by the gateway, such as a service control interaction manager (SCIM). The SCIM can be a layer and manage interactions between network devices such as mobile nodes and application servers and can provide abstraction of network devices. This can allow the gateway to provide interworking between network devices and handle mobile nodes with different capabilities.

US Patent:

8325615, Dec 4, 2012

Filed:

Sep 8, 2006

Appl. No.:

11/517883

Inventors:

Kaitki Agarwal - Westford MA, US
Matthew H. Harper - Salem NH, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G01R 31/08

US Classification:

370252, 370352

Abstract:

Systems and methods for integrating subscriber management and call control functionalities in a packet data network are provided. Subscriber management services include things such as tracking usage for billing, providing account information, and authorization of resources to a subscriber or user. Call control functionality includes setting up Session Initiation Protocol (SIP) call sessions for the exchange of data. SIP functionality is provided by a SIP server and subscriber management is provided by a Network Access Server (NAS), where the SIP functionality and NAS functionality are implemented on the same device. The combined device can maintain at least one database that maps information between the functionalities, so both functionalities may access or be alerted to the other's information.

US Patent:

8483685, Jul 9, 2013

Filed:

Jun 4, 2012

Appl. No.:

13/487593

Inventors:

Rajat Ghai - Sandwich MA, US
Kaitki Agarwal - Westford MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04W 4/00

US Classification:

4554351, 455428, 4554321, 4554352, 455445, 370353, 370354, 370355, 370356

Abstract:

Systems and methods are provided that allow the delivery of location based services within a communication network. The location information can be retrieved using information from the mobile node when the mobile node registers in the network. The location information can then be cached or stored in one or more places in the communication network and correlated with the mobile node's addressing information. If a request for location based services is received without location based information, the gateway can use location based information regarding the mobile node to provide location based services. The gateway can enable non IMS mobile nodes to obtain IMS location based services or incompatible mobile nodes to obtain location based services.

US Patent:

20080137671, Jun 12, 2008

Filed:

Dec 7, 2007

Appl. No.:

11/952980

Inventors:

Kaitki AGARWAL - Westford MA, US
Rajat GHAI - Sandwich MA, US

International Classification:

H04L 12/66

US Classification:

370401

Abstract:

Systems and methods for managing packet flows in a communication network are provided. Packet information can be cached on different levels and used to avoid external queries. The cache information can also be correlated with other types of information, such as location information, to be able to serve that information quicker than if one or more external queries were to be made. A demux manager can provide routing and session setup, by routing packets that already have a session to the session manager and assigning packets to a session manager if they are not already assigned to a session. The tiered architecture also provides scalability to many users and minimizes delays even during high call volumes because the load can be distributed well across the gateway's resources.

US Patent:

20080137686, Jun 12, 2008

Filed:

Nov 14, 2007

Appl. No.:

11/939914

Inventors:

Kaitki AGARWAL - Westford MA, US
Rajat GHAI - Sandwich MA, US

Assignee:

Starent Networks Corporation - Tewksbury MA

International Classification:

H04J 3/24

US Classification:

370474

Abstract:

Systems, methods, media, and means for hiding network topology are provided. In some embodiments, methods for hiding network topology are provided, the methods including: receiving a message including topology information from a sender; removing at least part of the topology information; associating the removed topology information with an identifier; saving the topology information; sending the message to a receiver; receiving a response from the receiver; retrieving the removed topology information based on the identifier; inserting the removed topology information into the response; and sending the response to the sender.