Patents Assigned to Alvarion Ltd.
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Publication number: 20110158193Abstract: A method and apparatus are provided for use in a wireless communications system to enable dynamic selection of k sub-MAPs, and rates for transmitting these k sub-MAPs within communication frames. The method comprises the steps: a) for at least one communication frame comprised within a first interval of time, retrieving information on statistical distribution of downlink (DL) channel rates for a group of subscriber devices; b) based on that information, selecting k and corresponding transmission rates for k sub-MAPs, to minimize total amount of resources to be allocated for MAP and sub-MAPs transmission within that communication frame comprised within the first time interval and/or within a second interval of time that proceeds the first interval of time; and c) transmitting the k sub-MAPs at the selected corresponding transmission rates in communication frames comprised within the first time interval and/or within the second interval of time that proceeds the first one.Type: ApplicationFiled: December 29, 2010Publication date: June 30, 2011Applicant: ALVARION LTD.Inventor: Yaniv WEIZMAN
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Publication number: 20110158203Abstract: A scheduler for transmission of Packetized data over a transmission link between a base station device and various terminal devices, each packet being associated with one terminal device, and the packets being of variable length. The scheduler calculates for each terminal device a proportional fair allocation metric, assigns a next available channel transmission resource to a device having a best metric, but only actually sends a next packet to a respective terminal device provided that respectively allocated and as yet unused channel transmission resources are sufficient to accommodate the next packet. Thus the packets are sent unfragmented and based on a proportional fair resource allocation.Type: ApplicationFiled: December 31, 2009Publication date: June 30, 2011Applicant: Alvarion Ltd.Inventor: Erez BITON
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Publication number: 20110158182Abstract: A method of operating a communication system having a plurality of data channels for downlink transmission from a base station to a plurality of subscriber stations. The method comprises receiving, at a base station, an inflow having a plurality of packets of a plurality of connections, each the connection being with one of a plurality of subscriber stations, regulating the inflow according to a throughput rate, setting a deadline to each the packet in the regulated inflow as a function of its reception time, and scheduling a transmission of the plurality of packets to the plurality of subscriber stations according to their deadlines so as to guarantee substantially the throughput rate for each one of the plurality of connections.Type: ApplicationFiled: December 24, 2009Publication date: June 30, 2011Applicant: Alvarion Ltd.Inventors: Erez BITON, Moshe Yuda
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Patent number: 7970359Abstract: In a wireless transmission system including a transmit delay module, delaying each of at least one copy of a signal by a respective delay, the signal being transmitted over a plurality of carrier frequencies and over at least one beam, the at least one beam exhibiting a beam pattern, the number of copies of the signal corresponding to the number of beams, each the at least one copy being associated with a respective one of the at least one beam, the system further including a beam pattern former, coupled with the transmit delay module, producing a plurality of transmit signals corresponding to the beam pattern, a frequency dependent beam shifter, coupled with the beam pattern former, delaying each of the at least one transmit signal by a respective angular shift delay, thereby applying an angular shift to each of the at least one beam, the angular shift of each of the at least one beam corresponding to at least a respective one of the carrier frequencies, wherein each beam is transmitted with a delay correspoType: GrantFiled: July 29, 2008Date of Patent: June 28, 2011Assignee: Alvarion Ltd.Inventors: Ariel Doubchak, Danny Stopler, Rafael Halfon
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Publication number: 20110149825Abstract: In a wireless communications network comprising a plurality of multicast and broadcast service (MBS) zones each of which comprises at least one base station, there is provided a method for providing a multicast and broadcast service to a mobile terminal capable of moving from one MBS zone to another. The method comprises the steps of: providing the mobile terminal with one or more multicasting/broadcasting transmissions comprising at least one multicast connection identification (MCID) associated with an MBS zone other than a current MBS zone at which the mobile terminal is currently receiving the one or more multicasting/broadcasting transmissions; retrieving information regarding the at least one MCID; and upon detecting that the mobile terminal is capable of receiving transmissions associated with the other MBS_ZONE, utilizing the MCID associated with that other MBS_ZONE to receive multicasting/broadcasting transmissions intended for that mobile terminal.Type: ApplicationFiled: March 2, 2009Publication date: June 23, 2011Applicant: ALVARION LTD.,Inventors: Nadav Lavi, Leonid Shousterman
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Publication number: 20110138448Abstract: A method is provided for providing secured mobile IP services to a mobile terminal which is currently associated with an access network different from its own home access network. The method is characterized by creating a virtual mobile node at an access network server of the current access network, which communicates with a Home Agent associated with the terminal's home mobile network and with one or more access points associated with the current access network, at which the mobile terminal is currently located.Type: ApplicationFiled: January 28, 2011Publication date: June 9, 2011Applicant: Alvarion Ltd.Inventor: Leonid Shousterman
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Publication number: 20110116379Abstract: A method and device are provided for synchronizing data transmission of multicasting/broadcasting services (MBS) by a plurality of Base Stations. The method disclosed includes providing synchronization information to enable the plurality of Base Stations to start transmitting MBS data at a synchronized starting time point. Meanwhile, each of the Base Stations receives the MBS data to be transmitted and determines whether any of the MBS data has not been properly received. If so, the respective Base Station may initiate a process to recover the missing MBS data and/or to obtain information regarding the missing data to determine the duration of the time period that would have been required for transmitting the missing MBS.Type: ApplicationFiled: January 25, 2011Publication date: May 19, 2011Applicant: Alvarion Ltd.Inventors: Leonid SHOUSTERMAN, Oleg MATINCHENKO, Mark ALTSHULER, Nadav LAVI
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Publication number: 20110111783Abstract: A wireless communications system is described, which comprises a plurality of base stations and a plurality of subscriber devices.Type: ApplicationFiled: November 9, 2010Publication date: May 12, 2011Applicant: ALVARION LTD.Inventor: Naftali CHAYAT
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Patent number: 7929468Abstract: A method for reducing interference between FDD and a TDD interfering radio networks including identifying respective radio entities for which the interferences should be reduced; defining a time pattern comprising time slots on each of the interfered channels, and receive time intervals for radio entities that may be interfered, and aligning the time patterns so that receive time intervals for the radio entities that are potentially exposed to interferences, overlap each other. The radio entity that might create interference to the radio entity of the pre-defined type of the other network, is prevented from transmitting communications that might create e substantial interference to the radio entity associated with the other radio network, and communications transmitted to some radio entities of the pre-defined types that might experience interference, are scheduled at intervals in which communications are received with substantially reduced interference.Type: GrantFiled: July 1, 2009Date of Patent: April 19, 2011Assignee: Alvarion Ltd.Inventor: Mariana Goldhamer
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Patent number: 7925295Abstract: A method and devices are provided to allow reducing interferences occurring in adjacent wireless communication networks. When a subscriber device experiences interferences resulting from the operation of an adjacent wireless network, it transmits an adjustment signal which serves as a request for adjustment, to the base station operative at the adjacent wireless communication network. The adjacent base station that receives the adjustment signal retrieves adjustment information therefrom, and based on the retrieved information will determine whether it should effect a change in its transmission that would result in reducing the interferences experienced at the subscriber device sending the adjustment signal.Type: GrantFiled: April 13, 2005Date of Patent: April 12, 2011Assignee: Alvarion Ltd.Inventors: Vladimir Yanover, Tal Kaitz, Naftali Chayat
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Patent number: 7903540Abstract: A method and device are provided for synchronizing data transmission of multicasting/broadcasting services (MBS) by a plurality of Base Stations. The method disclosed includes providing synchronization information to enable the plurality of Base Stations to start transmitting MBS data at a synchronized starting time point. Meanwhile, each of the Base Stations receives the MBS data to be transmitted and determines whether any of the MBS data has not been properly received. If so, the respective Base Station initiates a process to recover the missing MBS data or to obtain within a pre-determined time interval, information regarding the missing data to determine the duration of the time period that would have been required for transmitting the missing MBS.Type: GrantFiled: August 2, 2007Date of Patent: March 8, 2011Assignee: Alvarion Ltd.Inventors: Leonid Shousterman, Oleg Marinchenco, Mark Altshuler, Nadav Lavi
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Patent number: 7881262Abstract: A method is provided for providing secured mobile IP services to a mobile terminal which is currently associated with an access network different from its own home access network. The method is characterized by creating a virtual mobile node at an access network server of the current access network, which communicates with a Home Agent associated with the terminal's home mobile network and with one or more access points associated with the current access network, at which the mobile terminal is currently located.Type: GrantFiled: July 7, 2005Date of Patent: February 1, 2011Assignee: Alvarion Ltd.Inventor: Leonid Shousterman
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Publication number: 20110002275Abstract: A method of using resource blocks in a communication system with a plurality of Base Stations (BSs), including assigning resource blocks to a first BS, the first BS communicating to a second BS a message comprising information about at least one resource block assigned to the first BS and not planned to be used by the first BS, and the second BS receiving the message. Optionally, the second BS using the at least one resource block. Related apparatus and methods are also described.Type: ApplicationFiled: July 1, 2009Publication date: January 6, 2011Applicant: Alvarion Ltd.Inventor: Leonid SHOUSTERMAN
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Publication number: 20100321233Abstract: A method is provided for use in calibrating a plurality of antennas comprised in an antenna array and wherein the antenna array comprises at least one gain control circuitry.Type: ApplicationFiled: June 18, 2009Publication date: December 23, 2010Applicant: ALVARION LTD.Inventors: Avra'am Ben-Zur, Michael Delishansky, David Shechter
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Publication number: 20100316010Abstract: A method is provided for transmitting combined frequency reuse communications in a wireless network. The communications are transmitted along sub-channels associated with given frequency channel partitions. At least one of the combined frequency reuse frames comprises at least one sub-channel operative according to a first reuse scheme and at least one other sub-channel operative according to another reuse scheme. Preferably, the transmission power level for conveying communications along at least one sub-channel assigned in each of the sectors according to the first reuse scheme, is substantially equal to that used in all other sectors, the transmission power level of another sub-channel operative according to another reuse scheme is higher than a first threshold in at least one of the sectors and the transmission power level in at least one other of the sectors is lower than the first threshold but higher than a second threshold.Type: ApplicationFiled: January 14, 2009Publication date: December 16, 2010Applicant: ALVARION LTD.Inventor: Mariana Goldhamer
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Publication number: 20100302969Abstract: A method for detecting an interferer signal in a duplex communication channel. The method comprises establishing a duplex communication channel for transmitting and receiving a signal having a plurality of frames each comprising an uplink (UL) and a downlink (DL) sub frames, allocating a plurality of silent slots in at least on of the UL and DL sub frames of at least some of the plurality of frames, intercepting at least one transmission signal during the plurality of silent slots, and detecting at least one interferer signal according to the at least one transmission signal.Type: ApplicationFiled: June 2, 2010Publication date: December 2, 2010Applicant: Alvarion Ltd.Inventors: Izhak DUENYAS, Ziv Dashevsky, David Cohen
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Publication number: 20100248738Abstract: A load balancing system for a wireless network comprises: a base station parameter extraction unit able to extract base station availability parameters of currently available base stations; and a base station quality of service selector associated with said base station parameter extraction unit configured to determine from said parameters which of said available base stations is able to provide a currently required quality of service. The system requests resources from one such base station, thereby to ensure that mobile stations are distributed in a balanced manner between the available base stations. As well as quality of service, interference with other links may be taken into account, and uplinks and downlinks may be considered separately.Type: ApplicationFiled: March 31, 2009Publication date: September 30, 2010Applicant: Alvarion Ltd.Inventors: Naftali CHAYAT, David Zelikosky, Ariel Doubchak, Nadav Lavi
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Publication number: 20100246490Abstract: A method is provided for combining corrupted messages received in a wireless network which comprises the following steps: (a) receiving a first message transmitted from one of a plurality of communication devices, wherein that first message is received as a corrupted message; (b) following the receipt of the first corrupted message, receiving a first plurality of messages, wherein the first plurality of messages are received as corrupted messages and wherein at least one of the first plurality of corrupted messages is essentially identical to the first message; (c) combining the first corrupted message with the at least one of the first plurality of corrupted messages that is essentially identical to that first message to form a combined message; and (d) deriving from the combined message information which was transmitted within the first message.Type: ApplicationFiled: March 24, 2010Publication date: September 30, 2010Applicant: ALVARION LTD.Inventors: Nadav LAVI, Jacob Vainappel
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Patent number: 7804802Abstract: In a wireless network comprising at least a first and a second wireless communication devices, a method is provided for determining at least one characteristic for communication between a base station and a subscriber terminal, based on information derived by affecting an exponential effective signal to interference ratio mapping (EESM) upon one or more signals transmitted by the base station and received by the subscriber terminal.Type: GrantFiled: February 14, 2006Date of Patent: September 28, 2010Assignee: Alvarion Ltd.Inventor: Dan Stopler
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Patent number: 7768972Abstract: In a wireless communications network comprising at least two subscriber terminals each operative to communicate with the same base station using a different PHY mode transmissions than the other, a method and apparatus for allowing communications with these subscriber terminals along a single frequency communication channel is provided. The communication is carried by defining common radio transmission frames in which each of the at least two PHY modes communications is carried out while occupying a different part of the common radio transmission frames. Preferably, at least one of the PHY modes is in compliance with IEEE 802.16 Standard.Type: GrantFiled: November 2, 2005Date of Patent: August 3, 2010Assignee: Alvarion, Ltd.Inventor: Mariana Goldhamer