Rajesh F Ramankutty

US Patent:

6917592, Jul 12, 2005

Filed:

Jan 22, 2001

Appl. No.:

09/767048

Inventors:

Rajesh Ramankutty - Schaumburg IL, US
Shaji Radhakrishnan - Des Plaines IL, US
Matthew Hayden Harper - Tewksbury MA, US

Assignee:

3COM Corporation - Marlborough MA

International Classification:

G01R031/08
H04J003/16

US Classification:

370237, 370468

Abstract:

A primary LNS, a peer LNS and a LAC are coupled to each other via a network A CPE is coupled to the LAC. A first tunnel is established between the CPE and the LAC using the network and information is transmitted through the first tunnel. A determination is made as to whether the primary LNS is overloaded or inoperative. State information is offloaded from the primary LNS to the peer LNS. If the primary LNS is inoperative or overloaded, a second tunnel is established from the CPE to the peer LNS using the state information. Information is transmitted though the second tunnel.

US Patent:

6950862, Sep 27, 2005

Filed:

May 7, 2001

Appl. No.:

09/850176

Inventors:

Janakiraman Senthilnathan - Mount Prospect IL, US
Rajesh Ramankutty - Schaumburg IL, US
Shaji Radhakrishnan - Mount Prospect IL, US

Assignee:

3Com Corporation - Marlborough MA

International Classification:

G06F015/177

US Classification:

709220, 709202, 709219, 709222, 709228, 709237, 709223, 455438, 455436, 370331, 370335

Abstract:

A system and method are shown for offloading a computational service on a point-to-point connection. When a tunnel initiator network device, such as a Level 2 Tunneling Protocol Access Concentrator (LAC), detects a tunnel client network device, the LAC sets up a tunnel connection with a tunnel endpoint network device, such a Level 2 Tunneling Protocol Network Server (LNS). During a process of establishing a call session on the tunnel connection, the LAC sends its compression capabilities to the LNS. When the LNS detects that the LAC is capable of compressing tunnel packets, the LNS negotiates compression parameters with the tunnel client network device. Subsequently, the LNS transmits the negotiated compression parameters to the LAC that configures a compression engine based on the received compression parameters. Hereinafter, the tunnel client network device will send compressed tunnel packets to the LAC that will decompress the received tunnel packets prior to transmitting the tunnel packets to the LNS on the tunnel connections. Similarly, the LNS will send uncompressed tunnel packets on the tunnel connection to the LAC that will compress the received tunnel packets prior to transmitting the tunnel packets to the tunnel client network device.

US Patent:

6973024, Dec 6, 2005

Filed:

Feb 28, 2001

Appl. No.:

09/796162

Inventors:

Boby Joseph - Mt. Prospect IL, US
Saji Radhakrishnan - Des Plaines IL, US
Rajesh Ramankutty - Schaumburg IL, US

Assignee:

UTStarcom, Inc. - Alameda CA

International Classification:

G08C015/00

US Classification:

370217, 370221, 370352, 370432, 714 4

Abstract:

A method for switching between a first network element and a second network element, the first and second network elements each connected to a first network and a second network. The method may be carried out by configuring the first network element and the second network element to recognize the same data from the second network. Next, data may be readdressed so that it may be recognized by both network elements. After readdressed data are sent to the first network element and the second network element, the first network element may be disconnected from the first network and the second network element may be connected to the first network. Data may be forwarded from the second network to the first network with little or no loss during the switchover.

US Patent:

6996110, Feb 7, 2006

Filed:

Aug 31, 2001

Appl. No.:

09/943971

Inventors:

Satish Amara - Mount Prospect IL, US
Shaji Radhakrishnan - Mount Prospect IL, US
Rajesh Ramankutty - Mount Prospect IL, US
Boby Joseph - Mount Prospect IL, US

Assignee:

3Com Corporation - Marlborough MA

International Classification:

H04L 12/66
H04L 12/54
H04L 12/28

US Classification:

370396, 370389, 370429

Abstract:

A system and method for processing packets of information includes an ingress module. The ingress module receives a plurality of packets of information from a first network. The ingress module determines the type of each of the plurality of packets. A route server module is coupled to the ingress module. The route server module sends a distributed processing request to the ingress module. The ingress module receives the distributed processing request and, responsively, performs a first set of processing operations on selected ones of the plurality of packets. The selected ones of the plurality of packets are of a first type. The ingress module forwards others of the plurality of packets of information to the route server module. Each of the others of the plurality of packets are of a type distinct from the first type. The route server module receives the others of the plurality of packets of information and performs a second set of processing operations on the others of the plurality of packets of information.

US Patent:

7225236, May 29, 2007

Filed:

Aug 7, 2001

Appl. No.:

09/923895

Inventors:

Shaji Radhakrishnan - Mount Prospect IL, US
Rajesh Ramankutty - Schaumburg IL, US
Satish Amara - Mount Prospect IL, US

Assignee:

3Com Corporation - Marlborough MA

International Classification:

G06F 15/16

US Classification:

709218, 709225

Abstract:

A system for load balancing, the system includes a LAC, a contact LNS, and a plurality of load balancing LNSs. The LAC includes a contact LNS address, the contact LNS address specifies the address of a contact LNS. The contact LNS is communicatively coupled to the LAC and the plurality of load balancing LNSs are communicatively coupled to the contact LNS and to the LAC. The LAC sends a message to the contact LNS, the message informing the LAC of its availability and the contact LNS sends a response message containing IP address of a selected one of the plurality of load balancing LNSs to which the LAC should establish a session.

US Patent:

7855982, Dec 21, 2010

Filed:

Nov 19, 2007

Appl. No.:

11/942446

Inventors:

Rajesh Ramankutty - Nashua NH, US
Timothy G. Mortsolf - Palatine IL, US
Matthew H. Harper - Salem NH, US

International Classification:

H04L 12/16

US Classification:

370259

Abstract:

A system and method for providing services to packet flows in a communication network. The services include enhanced charging, stateful firewalls, traffic performance optimization (TPO) and advanced services such as content differentiated charging, per-subscriber stateful firewalls, and VPNs, for example. A gateway can be used to route each packet flow through the services on a per-subscriber basis by inspecting accounting messages and checking subscriber profiles prior to setting up a new packet flow session. By directing the packet flow through the services requested latency can be reduced as well as the need to have equipment for each session regardless of whether the service is provided to the packet flow. The services can be provided in-line as well.

US Patent:

7885248, Feb 8, 2011

Filed:

Apr 17, 2007

Appl. No.:

11/787740

Inventors:

Matthew H. Harper - Salem NH, US
Rajesh Ramankutty - Nashua NH, US
Shaji E. Radhakrishnan - Nashua NH, US
Kuntal Chowdhury - Plano TX, US

Assignee:

Starent Networks LLC - Wilmington DE

International Classification:

H04L 12/56

US Classification:

370349, 370401, 370328, 455428

Abstract:

Systems and methods for bridging packet flows to bypass call legs and/or tunnels are provided. A tunnel initiator, which can be an access gateway, a foreign agent, and a mobility anchor point, for example, provides a bypass for certain packets that have a destination serviced by the same tunnel initiator. The bridge allows the packets to bypass a backhaul loop and reduces latency and frees bandwidth for other purposes in the network. The bridging can be implemented in a tunnel initiator for mobile to mobile packet flows, mobile to land line packet flows, and land line to mobile packet flows. Route optimization can also be provided in certain embodiments.

US Patent:

8018847, Sep 13, 2011

Filed:

Nov 15, 2006

Appl. No.:

11/599959

Inventors:

Rajesh Ramankutty - Nashua NH, US
Noel Charath - Bradford MA, US

Assignee:

Starent Networks LLC - Wilmington DE

International Classification:

H04L 12/26
H04L 12/28
H04W 4/00

US Classification:

370230, 370338, 370351, 370401

Abstract:

Systems and methods for intercepting and redirecting requests are provided. More particularly, certain information is identified in a packet and the packet is redirected to a specified server. The information that is redirected may be bound for a server in a network that a mobile node is currently visiting, and it is advantageous to fulfill the request in another network instead. The request is redirected to the other network; however, the response to the request may be modified changing the source address and other information so that the response appears to have originated from the server in the visited network to which the mobile node sent the request. Load balancing may also be incorporated when redirecting requests from one or more mobile nodes.