Patents by Inventor Dorin Viorel
Dorin Viorel 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).
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Publication number: 20140064110Abstract: A method for device identification includes determining a mass event has occurred in a wireless network from a reception of a plurality of signals each having a last gasp message, sampling a plurality of mapped zones associated with a base station, identifying which mapped zones are associated with a disconnected endpoint in a zone list, determining a length of time of the mass event, and selectively providing the zone list to identify disconnected endpoints based at least upon the length of time of the mass event. Each mapped zone includes a plurality of wireless device endpoints associated with the mapped zone. The sampling includes determining whether any of a subset of the endpoints associated with the given mapped zone are disconnected from the wireless network.Type: ApplicationFiled: August 31, 2012Publication date: March 6, 2014Applicant: FUJITSU LIMITEDInventors: Dorin Viorel, Akira Ito
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Patent number: 8588148Abstract: According to one embodiment, a method for wireless communication includes coupling a base station to a network access device. The network access device provides access to an Internet service provider network. The method also includes determining, at the base station, a plurality of available communication channels of a wireless service provider network that may be utilized to communicate with an endpoint. In addition, the method includes determining, at the base station, at least one interference power measurement for at least one channel of the plurality of channels. Further, the method includes determining, at the base station, at least one average interference power for at least one channel of the plurality of channels utilizing the at least one interference power measurement. The method also includes automatically selecting a channel for communication with the endpoint in response to determining the at least one average interference power.Type: GrantFiled: June 12, 2009Date of Patent: November 19, 2013Assignee: Fujitsu Semiconductor LimitedInventors: Changqin Huo, Dorin Viorel, Aram Sukiasyan
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Patent number: 8570955Abstract: A method of mapping transmission stations in a wireless network by grouping the transmission stations such that each transmission station in the same group transmits a sounding signal in the same time symbol. A method of grouping transmission stations in a wireless network includes sorting the transmission stations in descending order according to a number of transmission links of each transmission station that are unmapped, evaluating each transmission station based on how many unmapped transmission links can be mapped if the evaluated transmission station is made to transmit a sounding signal, placing each transmission station into a group, based on the evaluation, until all of the transmission links are mapped or until the maximum number of sounding bands are used, and, if all of the transmission links are not mapped, repeating the sorting, evaluating, and placing for each time symbol until all of the transmission links are mapped.Type: GrantFiled: February 25, 2008Date of Patent: October 29, 2013Assignee: Fujitsu LimitedInventors: Dorin Viorel, Wei-Peng Chen, Jonathan Agre, Chenxi Zhu
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Patent number: 8559388Abstract: A method for implementing a self organizing network includes establishing a connection between a femto base station and a network access device operable to provide the femto base station with Internet access. The method also includes establishing a backhaul connection between the femto base station and a wireless service provider's network via the Internet. The method further includes establishing a wireless connection with one or more endpoints via a radio frequency (RF) channel. The method additionally includes transmitting, from the femto base station to the wireless service provider's network, neighborhood RF interference information via the backhaul connection. The method also includes receiving RF channel re-provisioning information from the wireless service provider's network and re-provisioning the RF channel. The method further includes participating in a hand-off procedure to hand-off the endpoints to the re-provisioned RF channel.Type: GrantFiled: June 8, 2009Date of Patent: October 15, 2013Assignee: Fujitsu Semiconductor LimitedInventors: Dorin Viorel, Changqin Huo, Masato Okuda, Wei-Peng Chen, Chenxi Zhu
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Publication number: 20130244640Abstract: In an example embodiment, a system may include a mobile terminal. The mobile terminal may be configured to receive a first signal including a first time advance value. The first signal may be transmitted by a first base station. The mobile terminal may be further configured to receive a second signal. The second signal may be transmitted by a second base station. The mobile base station may be further configured to determine a difference in propagation delay between the first and second signals. The mobile terminal may be further configured to determine a second time advance value by correlating the first time advance value with the difference in propagation delay.Type: ApplicationFiled: March 14, 2012Publication date: September 19, 2013Applicant: FUJITSU LIMITEDInventors: Dorin VIOREL, Chenxi ZHU
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Publication number: 20130010628Abstract: A method for cooperative data transfer includes establishing a primary wireless connection with a primary access station. The primary wireless connection uses a primary synchronization channel that is transmitted during a first frame of a super frame. The super frame comprises a plurality of frames. The method also includes detecting a secondary synchronization channel generated by an alternate access station during a subsequent frame of the super frame. The method further includes determining whether the detected secondary synchronization channel has a signal strength greater than a threshold signal strength. The method additionally includes receiving permission to begin a cooperative data transfer operation with both the primary access station and the alternate access station.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicants: FUJITSU MICROELECTRONICS LIMITED, FUJITSU LIMITEDInventors: Dorin Viorel, Masato Okuda, Kevin Power, Luciano Sarperi
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Patent number: 8284700Abstract: A method for cooperative data transfer includes establishing a primary wireless connection with a primary access station. The primary wireless connection uses a primary synchronization channel that is transmitted during a first frame of a super frame. The super frame comprises a plurality of frames. The method also includes detecting a secondary synchronization channel generated by an alternate access station during a subsequent frame of the super frame. The method further includes determining whether the detected secondary synchronization channel has a signal strength greater than a threshold signal strength. The method additionally includes receiving permission to begin a cooperative data transfer operation with both the primary access station and the alternate access station.Type: GrantFiled: October 23, 2009Date of Patent: October 9, 2012Assignee: Fujitsu Semiconductor LimitedInventors: Dorin Viorel, Masato Okuda, Kevin Power, Luciano Sarperi
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Patent number: 8144641Abstract: A method for implementing an in-band relay scheme includes establishing a connection between a base station and a relay station and between the relay station and a mobile station using a frequency. The method also includes receiving data from the base station during a frame via the frequency, the frame comprising a downlink sub-frame, and an uplink sub-frame, wherein the data is received during a beginning portion of the downlink sub-frame. The method further includes transitioning from receive to transmit during the downlink sub-frame. The method additionally includes transmitting data, received from the base station during a previous frame, to the endpoint during a later portion of the downlink sub-frame via the frequency. The method also includes transmitting data received from the endpoint during a previous frame, to the base station during a beginning portion of the uplink sub-frame via the frequency. The method further includes transitioning from transmit to receive during the uplink sub-frame.Type: GrantFiled: July 2, 2009Date of Patent: March 27, 2012Assignee: Fujitsu Semiconductor LimitedInventors: Changqin Huo, Dorin Viorel, Masato Okuda
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Patent number: 7990906Abstract: A frame structure for a relay station operating in an OFDMA network includes a downlink sub-frame having a first allocated time zone dedicated for transmission between a base station in the network and the relay station, a second allocated time zone dedicated for transmission between the base station and a mobile station in the network, and a third allocated time zone dedicated for transmission between the relay station and the mobile station; and an uplink sub-frame having a first allocated time zone dedicated for transmission between the mobile station and the relay station, a second allocated time zone dedicated for transmission between the mobile station and the base station, and a third allocated time zone dedicated for transmission between the relay station and the base station.Type: GrantFiled: October 29, 2007Date of Patent: August 2, 2011Assignee: Fujitsu Semiconductor LimitedInventors: Dorin Viorel, Fraser Cameron, Ken Wong, Tamio Saito, Masato Okuda
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Patent number: 7983172Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.Type: GrantFiled: November 16, 2009Date of Patent: July 19, 2011Assignee: Fujitsu Semiconductor LimitedInventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
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Publication number: 20110086653Abstract: Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.Type: ApplicationFiled: December 16, 2010Publication date: April 14, 2011Applicant: Fujitsu LimitedInventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
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Patent number: 7877097Abstract: Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.Type: GrantFiled: July 13, 2007Date of Patent: January 25, 2011Assignee: Fujitsu LimitedInventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
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Publication number: 20100172267Abstract: A method for cooperative data transfer includes establishing a primary wireless connection with a primary access station. The primary wireless connection uses a primary synchronization channel that is transmitted during a first frame of a super frame. The super frame comprises a plurality of frames. The method also includes detecting a secondary synchronization channel generated by an alternate access station during a subsequent frame of the super frame. The method further includes determining whether the detected secondary synchronization channel has a signal strength greater than a threshold signal strength. The method additionally includes receiving permission to begin a cooperative data transfer operation with both the primary access station and the alternate access station.Type: ApplicationFiled: October 23, 2009Publication date: July 8, 2010Applicants: Fujitsu Microelectronics Limited, Fujitsu LimitedInventors: Dorin Viorel, Masato Okuda, Kevin Power, Luciano Sarperi
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Publication number: 20100142436Abstract: A transmission method for use in a multi-hop wireless communication system is provided. The system includes a source apparatus, a destination apparatus and one or more intermediate apparatuses. The system has access to at least one predetermined transmission introduction sequence and also has access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval. Each window occupies a different part of that interval and has a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval. Each said window being assignable for such a transmission interval to at least one of said apparatuses for use in transmission. The method includes, when transmitting a message with a preamble in a particular transmission interval, transmitting the preamble in a first transmission window of that transmission interval.Type: ApplicationFiled: December 29, 2009Publication date: June 10, 2010Applicant: Fujitsu LimitedInventors: Michael John Beems Hart, Yuefeng Zhou, Dorin Viorel, Chenxi Zhu, Michiharu Nakamura, Masahiro Watanabe, Hiroshi Fujita, Makoto Yoshida
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Publication number: 20100074164Abstract: A method for transmission of information about downlink and uplink parameters of a intermediate apparatus link in a multi-hop wireless communication system, the system comprising a first node apparatus, a second node apparatus and one or more intermediate apparatuses, each said apparatus being operable to transmit and receive information along a series of links forming a communication path for downlink and uplink communication, the communication path extending between the first node and second node apparatuses via the or each intermediate apparatus, each link comprising either a first node link between the first node apparatus and a said intermediate apparatus or an intermediate apparatus link between a said intermediate apparatus and a said apparatus which is not the first node apparatus, and the system having access to a minimum allocation unit for allocating time and transmission frequency bandwidth, the method comprising: obtaining values of downlink and uplink parameters for a particular intermediate appType: ApplicationFiled: July 31, 2007Publication date: March 25, 2010Applicant: FUJITSU LIMITEDInventors: Michael John Beems Hart, Yuefeng Zhou, Dorin Viorel, Chenzi Zhu, Michiharu Nakamura, Masahiro Watanabe, Hiroshi Fujita, Makoto Yoshida
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Publication number: 20100061248Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.Type: ApplicationFiled: November 16, 2009Publication date: March 11, 2010Applicant: Fujitsu LimitedInventors: Chenxi ZHU, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
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Publication number: 20100002622Abstract: A method for implementing an in-band relay scheme includes establishing a connection between a base station and a relay station and between the relay station and a mobile station using a frequency. The method also includes receiving data from the base station during a frame via the frequency, the frame comprising a downlink sub-frame, and an uplink sub-frame, wherein the data is received during a beginning portion of the downlink sub-frame. The method further includes transitioning from receive to transmit during the downlink sub-frame. The method additionally includes transmitting data, received from the base station during a previous frame, to the endpoint during a later portion of the downlink sub-frame via the frequency. The method also includes transmitting data received from the endpoint during a previous frame, to the base station during a beginning portion of the uplink sub-frame via the frequency. The method further includes transitioning from transmit to receive during the uplink sub-frame.Type: ApplicationFiled: July 2, 2009Publication date: January 7, 2010Applicant: Fujitsu Microelectronics LimitedInventors: Changqin Huo, Dorin Viorel, Masato Okuda
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Patent number: 7643429Abstract: Interference levels occurring at one or more stations in a wireless network, where each of said one or more stations is a base station or a relay station. The measured interference levels are mapped by building a first matrix including noise plus interference occurring at each of the one or more stations, respectively, and scheduled transmissions at predetermined times by each relay station respectively are mapped by building a second matrix. The first matrix and the second matrix are multiplied in order to determine the noise plus interference impact upon each base station by each relay station so that a network schedule can be generated in order to increase bandwidth efficiency in the network.Type: GrantFiled: July 13, 2007Date of Patent: January 5, 2010Assignee: Fujitsu LimitedInventors: Chenxi Zhu, Dorin Viorel, Jagan Seshadri, Jonathan Agre, Wei-Peng Chen
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Publication number: 20090312022Abstract: A method for implementing a self organizing network includes establishing a connection between a femto base station and a network access device operable to provide the femto base station with Internet access. The method also includes establishing a backhaul connection between the femto base station and a wireless service provider's network via the Internet. The method further includes establishing a wireless connection with one or more endpoints via a radio frequency (RF) channel. The method additionally includes transmitting, from the femto base station to the wireless service provider's network, neighborhood RF interference information via the backhaul connection. The method also includes receiving RF channel re-provisioning information from the wireless service provider's network and re-provisioning the RF channel. The method further includes participating in a hand-off procedure to hand-off the endpoints to the re-provisioned RF channel.Type: ApplicationFiled: June 8, 2009Publication date: December 17, 2009Applicant: Fujitsu Microelectronics LimitedInventors: Dorin Viorel, Changqin Huo, Masato Okuda, Wei-Peng Chen, Chenxi Zhu
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Publication number: 20090310565Abstract: According to one embodiment, a method for wireless communication comprising coupling a base station to a network access device. The network access device provides the base station access to a wireless service provider network via an Internet service provider network. The method includes determining, at the base station, a plurality of available communication channels of the wireless service provider network that may be utilized to communicate with an endpoint. The method also includes determining, at the base station, a plurality of segment power measurements for at least one channel of the plurality of channels. In addition, the method includes automatically selecting, at the base station, a channel and segment index for communication with the endpoint in response to determining the plurality of segment power measurements.Type: ApplicationFiled: June 12, 2009Publication date: December 17, 2009Applicant: Fujitsu Microelectronics LimitedInventors: Changqin Huo, Dorin Viorel