Patents by Inventor Mohan Ram

Mohan Ram 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: 9078198
    Abstract: Network devices are steered to preferred access points using a probability function. A probe request for connection is received from a network device. The probe request can be from a network device attempting to use a wireless network (e.g., a IEEE 802.11-type network or other suitable type of network). A probability function that defines a likelihood of granting the network device a connection is used to determine whether to accept or deny the response. The probe response is then sent to the network device.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: July 7, 2015
    Assignee: Meru Networks
    Inventors: Sung-Wook Han, Mohan Ram
  • Patent number: 9025581
    Abstract: A controller directing access points to default to a virtual cell service mode which allows seamless mobility for stations in motion around a wireless network is disclosed. Responsive to identifying a first station, the controller logic may dictate tighter controls for the first station by selecting a virtual port service mode. Some embodiments can also select a native cell service mode for devices due to a connection history of the station or a MAC OUI that is incompatible with virtual cell service mode. An initial service mode can be changed due to a condition. Also, the controller provides multiple BSSIDs to each access point.
    Type: Grant
    Filed: February 9, 2013
    Date of Patent: May 5, 2015
    Assignee: Meru Networks
    Inventors: Mohan Ram, Sung-Wook Han, Brett Schavey, Ajay Kunnath, Rishikesh Basu, Berend Dunsbergen, Vaduvur Bharghavan, Joseph Epstein
  • Publication number: 20150105929
    Abstract: An energy management system within a building obtains energy usage data over several cycles to determine a minimum feasible load. The minimum feasible load corresponds to operational conditions of the building, such as occupied or unoccupied. The energy usage data is binned according to the operational condition under which it was obtained. A threshold based on the minimum feasible load is used to monitor energy usage within the building and to identify anomalies in energy demand for possible action.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 16, 2015
    Inventors: Alberto Fonts Zaragoza, Frank Carl Altamura, JR., Mohan Ram Dattatreya, Himanshu Monty Joshi
  • Publication number: 20150012971
    Abstract: A spoofed management frame is sent to an unauthorized access point (AP) on behalf of a station from an authorized AP, using a media access control (MAC) address of the station. The spoofed frame triggers a security association (SA) query from an unauthorized AP to reestablish valid communications. An acknowledgment (ACK) frame sent from the client to the unauthorized AP responsive to the SA query request is detected by the AP. A probe response is sent to the client. The probe response includes a channel switching element. The channel switching prevents the client from completing the SA process before a time out.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 8, 2015
    Inventors: Mohan RAM, Anil KAUSHIK
  • Patent number: 8918220
    Abstract: An energy management system within a building obtains energy usage data over several cycles to determine a minimum feasible load. The minimum feasible load corresponds to operational conditions of the building, such as occupied or unoccupied. The energy usage data is binned according to the operational condition under which it was obtained. A threshold based on the minimum feasible load is used to monitor energy usage within the building and to identify anomalies in energy demand for possible action.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: December 23, 2014
    Assignee: Trane U.S. Inc.
    Inventors: Alberto Fonts Zaragoza, Frank Carl Altamura, Jr., Mohan Ram Dattatreya, Himanshu Monty Joshi
  • Patent number: 8903320
    Abstract: A method wherein a message packet is received at a node in a 1st wireless communication system, wherein said 1st wireless communication system determines whether it is experiencing interference with a 2nd wireless communication system, and wherein said 1st wireless communication system takes action to reduce said interference. Reducing said interference might include reduction in signal strength, change in message coding, and other actions, in response to a set of selected interference thresholds. Different protocol effects might be changed in response to one or more said thresholds, with the effect that distinct wireless communication systems may operate in relatively close proximity with a minimum of interference.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: December 2, 2014
    Assignee: Meru Networks
    Inventors: Vaduvur Bharghavan, Mohan Ram
  • Publication number: 20140233734
    Abstract: Traffic broadcast to a VLAN is restricted. To do so, a plurality of stations are associated with a BSSID (basic service set identifier). A first VLAN is configured by sending a first group key to each station from the plurality of stations that is a member of the first VLAN, wherein each VLAN is associated with a unique group key. One or more frames addressed to the first VLAN are received. The one or more frames are encrypted with the first group key to prevent stations without the first group key from being able to decrypt the one or more frames. The one or more encrypted VLAN frames are broadcast to the plurality of stations associated with the BSSID.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 21, 2014
    Inventors: Mohan RAM, Sung-Wook HAN
  • Publication number: 20140204802
    Abstract: Network devices are steered to preferred access points using a probability function. A probe request for connection is received from a network device. The probe request can be from a network device attempting to use a wireless network (e.g., a IEEE 802.11-type network or other suitable type of network). A probability function that defines a likelihood of granting the network device a connection is used to determine whether to accept or deny the response. The probe response is then sent to the network device.
    Type: Application
    Filed: January 21, 2013
    Publication date: July 24, 2014
    Applicant: MERU NETWORKS
    Inventors: Sung-Wook HAN, Mohan RAM
  • Publication number: 20140112322
    Abstract: An 802.11-compliant device for high throughput is disclosed. A plurality of TCP packets received in a buffer for transmission are stored. The plurality of TCP packets can be aggregated as A-MSDU sub-frames to form a A-MSDU frame in accordance with an IEEE 802.11 standard. Additionally, a plurality of A-MSDU frames can be aggregated as A-MPDU sub-frames to form a A-MPDU frame. The A-MPDU frame is compliant with a number of allowable sub-frames and a maximum size in accordance with an 802.11 standard. The A-MPDU frame is sent for transmission as an IEEE 802.11 packet.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Inventors: Mohan RAM, Sung-Wook HAN
  • Patent number: 8599734
    Abstract: A system and method enable the transmission of messages between a source device and a wireless station. A first message is received at an access point from the source device. The access point transmits the first message to the wireless station and stores a copy of the first message in a memory. The access point receives an acknowledgement message from the wireless station and transmits a proxy acknowledgement message to the source device. The access point transmits a control message to the source device to limit the number or size of additional messages sent from the source device based on a number or size of messages currently stored in the memory and a maximum number or size of messages that can be stored in the memory.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: December 3, 2013
    Assignee: Meru Networks
    Inventors: Mohan Ram, Vaduvur Bharghavan, Saravanan Balasubramanian
  • Publication number: 20130188539
    Abstract: Techniques which prevent rogue devices from continued access to a wireless communication system. A control element directs access points as to which mobile stations to service. Each access point maintains a record of the mobile stations it is servicing. At the direction of the control element, one or more access points send ACK (acknowledgement) messages when hearing messages from a rogue device. When the rogue device sends a message, it expects an ACK message in response, but those additional ACK messages interfere with the responsive ACK message, causing the rogue device to never hear the responsive ACK message. The rogue device assumes its message was not received, so it retries sending of that message. When the rogue device retries sending of its message, the responsive ACK message is similarly interfered with, until the rogue device concludes that its connection has been lost.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 25, 2013
    Inventors: Sung-Wook HAN, Mohan Ram
  • Publication number: 20120307792
    Abstract: Uplink medium access control on per-wireless device level. An access point sends a beacon frame to a wireless device. The beacon frame includes a BSSID that is unique to the wireless device. The beacon frame also includes embedded uplink configurations specifying uplink medium access for the wireless device. In one embodiment, a controller recognizes a device or user associated with the device, and sends corresponding uplink configurations for embedding in a subsequent beacon frame.
    Type: Application
    Filed: March 22, 2012
    Publication date: December 6, 2012
    Inventors: Mohan RAM, Sung-Wook Han, Berend Dunsbergen, Vaduvur Bharghavan, Joseph Epstein
  • Patent number: 8325753
    Abstract: ACK messages by access points are suppressed when those access points receive messages from wireless stations for which those access points should not respond. This might occur in wireless communication systems based upon 802.11 protocols in which seamless mobility is desired, with a system controller that assigns wireless stations to specific access points. The access point examines an incoming message from a wireless device to decide whether or not to suppress a responsive ACK message to that wireless device. An access point may suppress an ACK message by suppressing the generation of the ACK, or by suppressing the transmission of a generated ACK. Mechanisms for suppressing an ACK message include setting the ACK transmission to a relatively unpowered transmitting antenna; interrupting a PHY-layer element during receipt of an incoming frame; and limiting entries in a key cache table to suppress ACK messages in response to encrypted incoming frames.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: December 4, 2012
    Assignee: Meru Networks
    Inventors: Vaduvur Bharghavan, Vinay Sagar, Mohan Ram
  • Patent number: 8238834
    Abstract: A set of techniques includes devices, methods, and user interfaces, capable of conducting proactive automated tests of a wireless system, and capable of operating while the wireless system is conducting its normal operations. A diagnostic device not controlled by the wireless system controls drivers and clients in that wireless system's access points, with the effect that the diagnostic device can inject message traffic into the wireless system while simulating clients of that system. The wireless system responds to that traffic and those simulated clients as if real clients were generating substantially real traffic for the system to handle. The diagnostic device can initiate messages from within that wireless system, can force those messages to traverse selected trajectories in that system, and can measure aspects of that system in response to those messages. Trajectories might include specific wireless devices, specific wireless parameters, and specific physical paths.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: August 7, 2012
    Assignee: Meru Networks
    Inventors: Vaduvur Bharghavan, Jari Malinen, Dhaval Deshmukh, Mohan Ram Bhadravati, Mohamad Thaga
  • Publication number: 20120035776
    Abstract: An energy management system within a building obtains energy usage data over several cycles to determine a minimum feasible load. The minimum feasible load corresponds to operational conditions of the building, such as occupied or unoccupied. The energy usage data is binned according to the operational condition under which it was obtained. A threshold based on the minimum feasible load is used to monitor energy usage within the building and to identify anomalies in energy demand for possible action.
    Type: Application
    Filed: August 5, 2010
    Publication date: February 9, 2012
    Inventors: Alberto Fonts Zaragoza, Frank Carl Altamura, JR., Mohan Ram Dattatreya, Himansho Monty Joshi