Patents Assigned to Meru Networks
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Publication number: 20150230231Abstract: Network devices are steered based on VHT (very high throughput) capabilities, a first radio of the plurality of radios is assigned to MU-MIMO (multiple user-multiple input/multiple output) communication. The first radio is capable of communication using MU-MIMO and is backward-compatible for communication using SU-MIMO (single user-multiple input/multiple output). A second radio of the plurality of radios is assigned to SU-MIMO communication. A connection request is received from a network device. A VHT capability of the network device is determined. The VHT capability is based on whether the network device is able to communicate using an MU-MIMO radio. Responsive to a determination that the network device is capable of MU-MIMO communication, the network device is matched to a radio capable of MU-MIMO communication. Responsive to a determination that the network device is not capable of MU-MIMO communication, the network device is matched to a radio capable of SU-MIMO communication.Type: ApplicationFiled: September 10, 2014Publication date: August 13, 2015Applicant: MERU NETWORKSInventor: Teodoro FORNOLES, JR.
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Patent number: 9078198Abstract: 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: GrantFiled: January 21, 2013Date of Patent: July 7, 2015Assignee: Meru NetworksInventors: Sung-Wook Han, Mohan Ram
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Publication number: 20150124774Abstract: A technique for providing per station control of multiple stations in a wireless network across multiple access points. A look-up table that assigns a station connected to the access point and at least one communication parameter to each of a plurality of persistent, uniquely-assigned BSSIDs (Basic Service Set Identifiers) is stored. An access point responds to messages addressed one of the plurality of persistent, uniquely-assigned BSSIDs and ignores messages addressed to other BSSIDs. Persistence of the BSSID allows the controller to maintain individual control over each station after moving to a second access point of the plurality of access points. A frame comprising the plurality of BSSIDs corresponding to each connected station aggregated into the frame is generated. The frame is transmitted to the plurality of stations.Type: ApplicationFiled: October 1, 2014Publication date: May 7, 2015Applicant: Meru NetworksInventors: Anil KAUSHIK, Srivatsan SANKARANARAYANAN, Vaduvur BHARGHAVAN, Sung-Wook HAN, Joseph EPSTEIN, Berend DUNSBERGEN, Saravanan BALASUBRAMANIYAN
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Patent number: 9025581Abstract: 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: GrantFiled: February 9, 2013Date of Patent: May 5, 2015Assignee: Meru NetworksInventors: Mohan Ram, Sung-Wook Han, Brett Schavey, Ajay Kunnath, Rishikesh Basu, Berend Dunsbergen, Vaduvur Bharghavan, Joseph Epstein
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Patent number: 8995459Abstract: A communication system detects particular application protocols in response to their message traffic patterns, which might be responsive to packet size, average packet rate, burstiness of packet transmissions, or other message pattern features. Selected message pattern features include average packet rate, maximum packet burst, maximum future accumulation, minimum packet size, and maximum packet size. The system maintains a counter of packet tokens, each arriving at a constant rate, and maintains a queue of real packets. Each real packet is released from the queue when there is a corresponding packet token also available for release. Packet tokens overfilling the counter, and real packets overfilling the queue, are discarded. Users might add or alter application protocol descriptions to account for profiles thereof.Type: GrantFiled: June 30, 2010Date of Patent: March 31, 2015Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Shishir Varma, Sung-Wook Han
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Patent number: 8958334Abstract: Systems and methods for implementing a differential signal to noise ratio (DSNR) based rate adaptation for wireless networks are disclosed. The described methods probabilistically adapt the rate of data transmission based on an assessment of the causes of data loss. The described methods include determining a DSNR for data transmission during a predetermined window of time and adapting the transmission rate in a probabilistic manner responsive to the differential SNR and a differential SNR threshold for the data transmission.Type: GrantFiled: April 27, 2013Date of Patent: February 17, 2015Assignee: Meru NetworksInventor: Vaduvur Bharghavan
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Publication number: 20150043530Abstract: For seamless mobility, at least one communication parameter to associate with a BSSID is selected. A beacon is sent from a first access point to advertise its presence, wherein the beacon comprises the BSSID associated with the at least one communication parameter. Responsive to the mobile station choosing the BSSID being advertised in the beacon sent from the first access point, a uniquely assign the BSSID is selected for a mobile station. The first access point from the plurality of access points is associated with the mobile station persistently. Associating is made as selected by the system coordinator, the uniquely assigned BSSID being independent of an identify of mobile station and being eligible for subsequent assignment to a different mobile station as determined by the system coordinator.Type: ApplicationFiled: July 21, 2014Publication date: February 12, 2015Applicant: MERU NETWORKSInventors: Vaduvur BHARGHAVAN, Sung-Wook HAN, Joseph EPSTEIN, Berend DUNSBERGEN, Saravanan BALASUBRAMANIAN
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Patent number: 8941539Abstract: A dual-band antenna including a ground plane, a first resonating plate that resonates in a first frequency band, a first shorting plate that shorts the first resonating plate to the ground plane, a second resonating plate that resonates in a second frequency band, with the second resonating plate raised above the first resonating plate with respect to the ground plane, and a second shorting plate that shorts the second resonating plate to the first resonating plate. Also, a dual-stack dual-band MIMO antenna comprising four dual-band antennas arranged in a square or rectangular pattern.Type: GrantFiled: February 23, 2011Date of Patent: January 27, 2015Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Rajendran Chary
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Patent number: 8929341Abstract: An access point switches between an access point mode and a surveillance mode. In the access point mode, the access point provides network access for end stations using a BSSID (Basic Service Set Identifier) while in the access point mode. In surveillance mode, the access point scans one or more channels of the wireless network to identify one or more anomalous devices.Type: GrantFiled: April 6, 2013Date of Patent: January 6, 2015Assignee: Meru NetworksInventor: Sung-Wook Han
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Patent number: 8903320Abstract: 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: GrantFiled: December 23, 2010Date of Patent: December 2, 2014Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Mohan Ram
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Patent number: 8893252Abstract: A selective barrier prevents undesired communication between a protected region and an unprotected region. Wireless communication is allowed within the protected region, while wireless communication is prevented between the protected region and any unprotected regions. Particular undesired message packets might be selected by business rules responsive to aspects of individual messages. Particular unprotected regions might be statically or dynamically determined. Alternatively, the selective barrier similarly operates to block undesired message packets from originating in any of the unprotected regions and successfully being received in the protected region.Type: GrantFiled: April 16, 2009Date of Patent: November 18, 2014Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Vijaykarthik Rajanarayanan
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Patent number: 8867744Abstract: Wireless security is enforced at L1, in addition to or in lieu of other layers. AP's can switch dynamically from serving to scanning. Scanners listen for authorized frame headers. Scanners either receive, or allow authorized frames to be received, at their destination. Scanners kill unauthorized frames while they are still transmitting; scanners continue listening for and killing unauthorized frame headers until frame ending time demands their return to serving, multiplying their effectiveness. AP's include dual-mode multi-frequency omni-directional antennae, used to prevent third parties from snooping messages received at those AP's.Type: GrantFiled: November 7, 2011Date of Patent: October 21, 2014Assignee: Meru NetworksInventors: Senthil Palanisamy, Vaduvur Bharghavan
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Patent number: 8799648Abstract: A controller for a wireless network includes processing elements, an interface for communication with access points for the wireless network, and an interface to another network. The processing elements oversee communication between that other network and the access points, and the controller acts as a certification authority for authenticating access points using public key techniques.Type: GrantFiled: August 14, 2008Date of Patent: August 5, 2014Assignee: Meru NetworksInventor: Rajinder Singh
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Publication number: 20140204802Abstract: 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: ApplicationFiled: January 21, 2013Publication date: July 24, 2014Applicant: MERU NETWORKSInventors: Sung-Wook HAN, Mohan RAM
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Patent number: 8787309Abstract: AP's associated with a communication network and any wireless devices desiring contact, operated according to a protocol in which each wireless device selects AP's with which to communicate. A system coordinator causes the AP's to operate so as to guide each wireless device to an AP selected by the system coordinator. This has the effect that, notwithstanding that the protocol involves having the wireless device make the selection of AP, functionally, the AP's make the selection for it. In a 1st technique, multiple AP's share an identifier, with the system coordinator directing one particular AP to respond to the wireless device, thus appearing to wireless devices as a “personal cell”. In a 2nd technique, AP's each maintain identifiers substantially unique to each wireless device, with the system coordinator directing only one particular AP to maintain any particular wireless device's identifier, thus appearing to wireless devices as a “personal AP”.Type: GrantFiled: October 27, 2010Date of Patent: July 22, 2014Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan Balasubramanian
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Patent number: 8767548Abstract: A method of adapting wireless transmission rates that includes the steps of determining at least a short-term loss ratio for wireless communication during a window of time, and adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window. A size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication. Preferably, the window is re-started if the transmission rate changes. Also, systems, devices, and memories that embody the foregoing.Type: GrantFiled: September 20, 2010Date of Patent: July 1, 2014Assignee: Meru NetworksInventors: Vaduvur Bharghavan, Starsky Wong, Hao Yang, Songwu Lu
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Patent number: 8599734Abstract: 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: GrantFiled: October 22, 2008Date of Patent: December 3, 2013Assignee: Meru NetworksInventors: Mohan Ram, Vaduvur Bharghavan, Saravanan Balasubramanian
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Publication number: 20130301443Abstract: Systems and methods for implementing a differential signal to noise ratio (DSNR) based rate adaptation for wireless networks are disclosed. The described methods probabilistically adapt the rate of data transmission based on an assessment of the causes of data loss. The described methods include determining a DSNR for data transmission during a predetermined window of time and adapting the transmission rate in a probabilistic manner responsive to the differential SNR and a differential SNR threshold for the data transmission.Type: ApplicationFiled: April 27, 2013Publication date: November 14, 2013Applicant: Meru NetworksInventor: Meru Networks
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Patent number: 8522353Abstract: One or more 802.11 access points that are programmed or otherwise configured to transmit a preferably continuous waveform over a band of frequencies that interferes with other devices in the region, effectively blocking all (or at least most) 802.11 traffic on channels spanned by that band of frequencies.Type: GrantFiled: August 14, 2008Date of Patent: August 27, 2013Assignee: Meru NetworksInventors: Berend Dunsbergen, Vaduvur Bharghavan
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Publication number: 20130188545Abstract: Deploying multiple access points on multiple wireless communication channels to optimize coverage area. Additional channels provide additional communication capability which multiple AP's, and their associated stations, can collectively use. An additional set of AP's can be disposed in the additional communication channel, with multiple communication channels possibly physically intersecting. The system control element collects information from devices in the wireless communication system, and automatically configures which AP is assigned to which communication channel. The system control element determines which AP's are servicing which physical locations, in response to feedback from AP's and stations in those locations. The system control element assigns, or re-assigns, AP's in each physical location, with the effect of optimizing coverage.Type: ApplicationFiled: January 19, 2012Publication date: July 25, 2013Applicant: Meru NetworksInventor: Sirivatsan Sankaranarayanan