Patents by Inventor Panayiotis Papadimitriou
Panayiotis Papadimitriou 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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Patent number: 11665528Abstract: In certain embodiments, a (CBSD) base station for a (CBRS) radio system transmits new information elements in an existing capability exchange message to a spectrum access system (SAS) informing the SAS as to whether the SAS should transmit a channel-change message to the base station either (i) directly (and despite of domain proxy being present in the communication path) or (ii) via a domain proxy. If and when the SAS subsequently receives notification of incumbent activity from an Environmental Sensing Capability system, the SAS transmits either a new channel-change message or includes new information elements in an existing heartbeat message to the base station either (i) directly or (ii) via the domain proxy per the capability exchange message.Type: GrantFiled: February 13, 2021Date of Patent: May 30, 2023Assignee: Charter Communications Operating, LLCInventors: Maulik Vaidya, Abdulrauf Hafeez, Panayiotis Papadimitriou, Dumitru Ionescu
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Publication number: 20220264287Abstract: In certain embodiments, a (CBSD) base station for a (CBRS) radio system transmits new information elements in an existing capability exchange message to a spectrum access system (SAS) informing the SAS as to whether the SAS should transmit a channel-change message to the base station either (i) directly (and despite of domain proxy being present in the communication path) or (ii) via a domain proxy. If and when the SAS subsequently receives notification of incumbent activity from an Environmental Sensing Capability system, the SAS transmits either a new channel-change message or includes new information elements in an existing heartbeat message to the base station either (i) directly or (ii) via the domain proxy per the capability exchange message.Type: ApplicationFiled: February 13, 2021Publication date: August 18, 2022Applicant: Charter Communications Operating, LLCInventors: Maulik Vaidya, Abdulrauf Hafeez, Panayiotis Papadimitriou, Dumitru Ionescu
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Patent number: 11240811Abstract: A method and apparatus for a transmission mode with user equipment (UE) independent physical downlink shared channel (PDSCH) scrambling for inter-cell and intra-cell PDSCH-to-PDSCH interference cancellation. A method may include configuring (610) a first identifier (e.g. first RNTI) for a first UE. The method may also include performing at least one of indicating (620) (e.g. semi-statically) a second identifier (e.g. PDSCH RNTI own) for the first UE, or indicating (630) (e.g. semi-statically) a third identifier (e.g. PDSCH RNTIJnt) for the first UE. The first identifier (e.g. first RNTI) is for at least one of operation of physical downlink control channel (PDCCH) of the first UE, or operation of PDSCH of the first UE if the second identifier (e.g. PDSCH RNTI own) is not indicated to the first UE; the second identifier (e.g. PDSCH RNTI own) is for at least one of scrambling or descrambling PDSCH of the first UE; and the third identifier (e.g.Type: GrantFiled: May 7, 2013Date of Patent: February 1, 2022Assignee: NOKIA TECHNOLOGIES OYInventors: Klaus Hugl, Panayiotis Papadimitriou, Cássio Ribeiro
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Publication number: 20210337528Abstract: Methods and apparatuses for indication of multiple data channels in a single control message are described. A network access node transmits a control message to a client device. The control message comprises a first control information associated with a first data channel (510) and a second control information associated with a second data channel. The first data channel and the second data channel do not overlap in frequency. The network access node further concurrently transmit a first data packet in the first data channel and a second data packet in the second data channel to the client device.Type: ApplicationFiled: July 8, 2021Publication date: October 28, 2021Inventors: Bengt LINDOFF, Wenquan HU, Thorsten SCHIER, Panayiotis PAPADIMITRIOU, Chaitanya TUMULA
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Patent number: 9706511Abstract: Various communication systems may benefit from an accurate detection method. The method may include determining correlation values between a first sequence of samples and at least one pre-defined sequence, detecting whether at least one first peak exists by comparing the correlation values with at least one first detection threshold. If the at least one first peak exists, the method may further include performing summing of at least a subset of the correlation values and detecting whether at least one second peak exists by comparing the summed correlation values with a second detection threshold.Type: GrantFiled: July 27, 2015Date of Patent: July 11, 2017Assignee: Nokia Technologies OyInventors: Ankit Bhamri, Zexian Li, Lars E. Lindh, Cássio Ribeiro, Panayiotis Papadimitriou
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Publication number: 20160381652Abstract: Various communication systems may benefit from an accurate cell detection method. The method may include determining at least one first correlation value between a first sequence of received samples and at least one pre-defined sequence, determining at least one second correlation value between a second sequence of received samples at a predetermined distance and the at least one pre-defined sequence, wherein the predetermined distance is substantially more than one symbol and substantially less than two symbols, performing summing of at least the at least one first correlation value and the at least one second correlation value to obtain at least one summed correlation value and detecting whether at least one peak exists by comparing the at least one summed correlation value with a detection threshold.Type: ApplicationFiled: October 15, 2015Publication date: December 29, 2016Inventors: Panayiotis PAPADIMITRIOU, Ankit BHAMRI, Lars E. LINDH, Cássio RIBEIRO
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Patent number: 9497003Abstract: Eliminating or reducing transmission of common signals for enhanced spectral efficiency, improved support for heterogeneous networks, network energy saving possibilities, can be obtained by apparatuses and methods according to certain embodiments. A method for operating a user equipment can include receiving a measurement object from a network for detection of one or more predetermined type cells. A cell search can be conducted. When a predetermined type cell is found, cell specific reference signal hopping parameters can be determined. Then, radio resource management measurement can be performed from the cell specific reference signal hopping parameters.Type: GrantFiled: January 24, 2013Date of Patent: November 15, 2016Assignee: NOKIA TECHNOLOGIES OYInventors: Sassan Iraji, Juha Korhonen, Esa Malkamaki, Panayiotis Papadimitriou, Antti Sorri
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Publication number: 20160309433Abstract: Various communication systems may benefit from an accurate detection method. The method may include determining correlation values between a first sequence of samples and at least one pre-defined sequence, detecting whether at least one first peak exists by comparing the correlation values with at least one first detection threshold. If the at least one first peak exists, the method may further include performing summing of at least a subset of the correlation values and detecting whether at least one second peak exists by comparing the summed correlation values with a second detection threshold.Type: ApplicationFiled: July 27, 2015Publication date: October 20, 2016Inventors: Ankit BHAMRI, Zexian LI, Lars E. LINDH, Cássio RIBEIRO, Panayiotis PAPADIMITRIOU
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Publication number: 20160081093Abstract: A method and apparatus for a transmission mode with user equipment (UE) independent physical downlink shared channel (PDSCH) scrambling for inter-cell and intra-cell PDSCH-to-PDSCH interference cancellation. A method may include configuring (610) a first identifier (e.g. first RNTI) for a first UE. The method may also include performing at least one of indicating (620) (e.g. semi-statically) a second identifier (e.g. PDSCH RNTI own) for the first UE, or indicating (630) (e.g. semi-statically) a third identifier (e.g. PDSCH RNTIJnt) for the first UE. The first identifier (e.g. first RNTI) is for at least one of operation of physical downlink control channel (PDCCH) of the first UE, or operation of PDSCH of the first UE if the second identifier (e.g. PDSCH RNTI own) is not indicated to the first UE; the second identifier (e.g. PDSCH RNTI own) is for at least one of scrambling or descrambling PDSCH of the first UE; and the third identifier (e.g.Type: ApplicationFiled: May 7, 2013Publication date: March 17, 2016Inventors: Klaus Hugl, Panayiotis Papadimitriou, Cássio Ribeiro
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Patent number: 9094275Abstract: Systems, methods, apparatuses, and computer program products for interference cancellation (IC) are provided. One method includes detecting, by a receiver, a synchronization signal with most power in correlation peak and obtaining the network identity and a location of a corresponding synchronization signal in a received signal.Type: GrantFiled: December 12, 2014Date of Patent: July 28, 2015Assignee: NOKIA TECHNOLOGIES OYInventor: Panayiotis Papadimitriou
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Publication number: 20150023197Abstract: Eliminating or reducing transmission of common signals for enhanced spectral efficiency, improved support for heterogeneous networks, network energy saving possibilities, can be obtained by apparatuses and methods according to certain embodiments. A method for operating a user equipment can include receiving a measurement object from a network for detection of one or more predetermined type cells. A cell search can be conducted. When a predetermined type cell is found, cell specific reference signal hopping parameters can be determined. Then, radio resource management measurement can be performed from the cell specific reference signal hopping parameters.Type: ApplicationFiled: January 24, 2013Publication date: January 22, 2015Applicant: Nokia CorporationInventors: Sassan Iraji, Juha Korhonen, Esa Malkamaki, Panayiotis Papadimitriou, Antti Sorri
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Publication number: 20140270024Abstract: According to an example embodiment of this application, a method may include calculating a timing offset estimate based on a received reference signal; accumulating consecutive timing offset estimates to generate a cumulative timing offset estimate; comparing the cumulative timing offset estimate against a threshold; and determining whether a time tracking has failed based on the comparison between the cumulative timing offset estimate and the threshold.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: NOKIA CORPORATIONInventor: Panayiotis Papadimitriou
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Publication number: 20090022079Abstract: An approach is provided for channel interleaving. A plurality of symbols are received and partitioned into a plurality of subblocks. The subblocks form a plurality of subsequences. A first output sequence is generated from the subsequences. The subsequences of the first output sequence is selected and punctured to generate a second output sequence, and interleaving the second output sequence.Type: ApplicationFiled: May 1, 2006Publication date: January 22, 2009Inventors: Fei Frank Zhou, Yan Wang, Panayiotis Papadimitriou, Zhouyue Pi
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Patent number: 7400686Abstract: A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.Type: GrantFiled: December 22, 2003Date of Patent: July 15, 2008Assignee: Nokia CorporationInventors: Mohammad J Borran, Prabodh Varshney, Hannu Vilpponen, Panayiotis Papadimitriou
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Publication number: 20070237067Abstract: A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.Type: ApplicationFiled: December 22, 2003Publication date: October 11, 2007Inventors: Mohammad Borran, Prabodh Varshney, Hannu Vilpponen, Panayiotis Papadimitriou
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Publication number: 20060239232Abstract: Apparatus, and an associated method, for designing codes to be used to code data that is communicated in a multi-access communication system. A selected code is designed, based upon an initial code. The selected code that is designed is of characteristics that best optimize channel differentiation to minimize interference between concurrently-communicated data coded by different codewords of the selected code.Type: ApplicationFiled: February 11, 2004Publication date: October 26, 2006Inventors: Panayiotis Papadimitriou, Costa Georghiades
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Publication number: 20050031018Abstract: Transmission of data from a base station to a set of users is improved by implementing an OFDM system as a CDMA system in which complex spreading codes are applied to the individual data in the transmitter and the receiver is a CDMA receiver.Type: ApplicationFiled: June 28, 2004Publication date: February 10, 2005Inventors: Panayiotis Papadimitriou, Costas Georghiades
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Publication number: 20050018598Abstract: A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.Type: ApplicationFiled: December 22, 2003Publication date: January 27, 2005Inventors: Mohammad Borran, Prabodh Varshney, Hannu Vilpponen, Panayiotis Papadimitriou
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Publication number: 20040028021Abstract: A system and method for the efficient transmission of information in a code division multiple access (CDMA) wireless telecommunication system. The rate of reliable transmission is increased by implementing an orthogonal frequency-division multiplexing (OFDM) scheme in, for example, a direct-spread CDMA network, resulting in a multi-carrier CDMA (MC-CDMA) system. Information (such as voice and data), is encoded, divided, and spread across the frequency domain, rather than in the time domain as in traditional CDMA; the allowable transmission bandwidth is divided into a number of carriers. Using this scheme, a number of loading parameters such as code rate, data rate, and the number of streams into which the encoded data is divided may be varied to increase the performance of the system. Application of the variable loading parameter may be a function of channel quality, such as the presence of noise or the channel fading state.Type: ApplicationFiled: June 27, 2003Publication date: February 12, 2004Inventors: Prabodh Varshney, Hannu Vilpponen, Mohammad Borran, Panayiotis Papadimitriou