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公开(公告)号：US11705804B2
公开(公告)日：2023-07-18
申请号：US17631116
申请日：2020-08-06
Applicant: ABB Schweiz AG
Inventor： Alexandre Christe , Yuhei Okazaki , Michele Luvisotto
CPC classification number: H02M1/092 , H02M7/4835 , H02M7/497
Abstract: A voltage source converter as well as a method and computer program product for controlling the converter. The converter includes at least one phase leg connected between a first DC terminal having a first voltage and a second DC terminal having a second voltage, the phase leg including an upper arm and a lower arm with cells, where a junction between the arms is connected to a corresponding AC terminal. The converter also includes a control unit configured to control the cells to output a train of pulses of trapezoidal shape where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with the decision that a transition is to be made.
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2.发明申请公开(公告)号：US20210006219A1
公开(公告)日：2021-01-07
申请号：US16969602
申请日：2018-02-13
Applicant: ABB Schweiz AG
Inventor： Zhibo Pang , Michele Luvisotto
Abstract: There is provided mechanisms for automatic gain control in a wireless communication network for power grid control. The wireless communication network employs time based scheduling of packets. A method is performed by a packet receiver in the wireless communication network. The method comprises receiving a packet from a packet transmitter. The packet comprises a preamble. The preamble is composed of a single OFDM symbol. The preamble is represented by a sequence of samples. The method comprises applying automatic gain control to the sequence of samples after variable gain amplitude control has been applied to the sequence of samples. The automatic gain control involves applying an LPF to the sequence of automatic gain controlled samples. The LPF is selected from a bank of LPSs. Which LPF to apply depends on, according to the time based scheduling, from which packet transmitter the packet is received.
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公开(公告)号：US20220278629A1
公开(公告)日：2022-09-01
申请号：US17631116
申请日：2020-08-06
Applicant: ABB Schweiz AG
Inventor： Alexandre Christe , Yuhei Okazaki , Michele Luvisotto
Abstract: A voltage source converter as well as a method and computer program product for controlling the converter. The converter includes at least one phase leg connected between a first DC terminal having a first voltage and a second DC terminal having a second voltage, the phase leg including an upper arm and a lower arm with cells, where a junction between the arms is connected to a corresponding AC terminal. The converter also includes a control unit configured to control the cells to output a train of pulses of trapezoidal shape where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with the decision that a transition is to be made.
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公开(公告)号：US20200252952A1
公开(公告)日：2020-08-06
申请号：US16777478
申请日：2020-01-30
Applicant: ABB Schweiz AG
Inventor： Zhibo Pang , Michele Luvisotto , Xiaolin Jiang , Roger Jansson , Carlo Fischione
Abstract: A method for time-slotted scheduling of packets in timeslots between N nodes and K>1 access points in an industrial wireless network, performed by a network controller of the industrial wireless network. The method includes determining the time-slotted scheduling by allocating each timeslot to a respective one of the nodes, wherein each timeslot for each node is divided in K sub-slots, one for each access point, such that in sub-slot k of each timeslot, where 1≤k≤K, transmission or reception of a packet is made between access point k and the node to which that timeslot is allocated. The method includes providing information to the access points about the determined time-slotted scheduling.
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Patent Agency Ranking
公开(公告)号：US20210006449A1
公开(公告)日：2021-01-07
申请号：US16969715
申请日：2018-02-13
Applicant: ABB Schweiz AG
Inventor： PANG Zhibo , Michele Luvisotto , Dacfey Dzung
IPC: H04L27/26
Abstract: A method is used for frequency offset estimation in a wireless communication network that employs time based scheduling of packets. The method is performed by a packet receiver in the wireless communication network. The method includes receiving a packet from a packet transmitter. The packet includes a preamble that is composed of samples of a single orthogonal frequency-division multiplexing symbol. The preamble has a cyclic prefix (CP) defined by a repetition of samples from an end-portion of the preamble and the preamble, except for the CP, is free from any repeated sequence of samples. The method also includes determining a sequence of similarity measure values between the CP of the preamble and the end-portion of the preamble, applying a low-pass filter to the sequence of similarity measure values, resulting in a filtered sequence of similarity measure values, and performing frequency offset estimation on the filtered sequence of similarity measure values.
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公开(公告)号：US20200252187A1
公开(公告)日：2020-08-06
申请号：US16777520
申请日：2020-01-30
Applicant: ABB Schweiz AG
Inventor： Zhibo Pang , Roger Jansson , Michele Luvisotto
Abstract: A method, a communication device, a computer program, and a computer program product for cyclic time-slotted operation in a wireless industrial network. The communication device includes a memory having a first memory area and a second memory area. The method includes running an application software at application layer. The application software is associated with a first pointer. The method includes operating a communication hardware at physical layer. The communication hardware is associated with a second pointer. The first pointer and the second pointer in a given timeslot point at a respective different one of the memory areas, such that in the given timeslot the application software is enabled to access one of the memory areas and the communication hardware is enabled to access the other of the memory areas. The method includes swapping the pointers to the memory areas at the end of each cycle of the cyclic time-slotted operation
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公开(公告)号：US20210153225A1
公开(公告)日：2021-05-20
申请号：US17045107
申请日：2018-04-04
Applicant: ABB Schweiz AG
Inventor： Zhibo Pang , Michele Luvisotto
Abstract: A method can be used for channel access in an industrial wireless network. A network controller allocates time/frequency resource units in a set of guaranteed timeslots to packet transceivers in the industrial wireless network. The guaranteed timeslots are timewise divided into slots and frequency wise divided into channels, where one slot-channel pair defines one time/frequency resource unit. The network controller provides to the packet transceivers information about the time/frequency resource units allocated to the packet transceivers. The packet transceivers map packets of their own traffic flows to their allocated time/frequency resource units in each set of guaranteed timeslots. The packets for each packet transceiver are mapped according to priority-based scheduling of its own traffic flows and independently of any mapping of packets of other packet transceivers in the industrial wireless network.
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公开(公告)号：US20210006448A1
公开(公告)日：2021-01-07
申请号：US16969704
申请日：2018-02-13
Applicant: ABB Schweiz AG
Inventor： PANG Zhibo , Michele Luvisotto , Dacfey Dzung
IPC: H04L27/26
Abstract: A method for packet detection in a wireless communication network employing time based scheduling of packets. The method is performed by a packet receiver in the wireless communication network. The method includes receiving a packet from a packet transmitter. The packet includes a preamble that is composed of a single orthogonal frequency-division multiplexing (OFDM) symbol and represented by a sequence of samples. T least part of the preamble is received within a packet detection window. Packet detection is performed in order to find a start of the packet only on those samples received within the packet detection window.
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9.发明申请公开(公告)号：US20200295901A1
公开(公告)日：2020-09-17
申请号：US16818186
申请日：2020-03-13
Applicant: ABB Schweiz AG
Inventor： Zhibo Pang , Michele Luvisotto , Roger Jansson
Abstract: A communication method for wireless communication uses a TDMA (Time Division Multiple Access) super-frame structure for scheduling uplink and downlink transmissions between a first node and a second node, the second node receives receiving a downlink transmission from the first node and transmits an uplink response to the first node. The transmission of the uplink response is performed in an uplink frame of the super-frame structure. The uplink frame includes a field for uplink payload data and a field for time indicating data. The transmission of the uplink response includes transmitting time stamps in the time indicating data field, the time stamps indicating a time instance of the receiving of the downlink transmission, and the time instance of the transmitting of the uplink response. The time instances are determined using the clock of the second node.
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