公开(公告)号：US11476963B2

公开(公告)日：2022-10-18

申请号：US17121491

申请日：2020-12-14

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04W56/00 ,  H04L7/033 ,  H04L27/26

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first time indication indicating a first time TS1, a second time indication indicating a second time TS2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time TS3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time TS4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter ⁢ ⁢ offset = ( TS ⁢ ⁢ 1 + TS ⁢ ⁢ 4 - TS ⁢ ⁢ 3 - TS ⁢ ⁢ 2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US20210320732A1

公开(公告)日：2021-10-14

申请号：US17180248

申请日：2021-02-19

Applicant: Aviat U.S., Inc.

Inventor： Gary Croke ,  Sergio Licardie ,  Robert Vilhar ,  Sreco Plevel ,  Marius Koegelenberg

IPC: H04B17/345

Abstract: An interference detection system comprises memory storing computer instructions to cause a processor to perform gathering a temporal snapshot of radio parameter values associated with a first site of a point-to-point radio system, the radio parameter values including at least a receive signal level (RSL) value and at least one other radio parameter value correlated with signal degradation; determining whether the RSL value is greater than an RSL threshold; determining whether the other radio parameter value indicates a threshold level of signal degradation; when the RSL is greater than the RSL threshold and the other parameter indicates a threshold level of signal degradation during the temporal snapshot, determining that external interference is present during the temporal snapshot; when the RSL is not greater than the RSL threshold, determining that the external interference is not present; and performing a responsive action to a determination of the external interference being likely present.

公开(公告)号：US20210152268A1

公开(公告)日：2021-05-20

申请号：US17121491

申请日：2020-12-14

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04W56/00 ,  H04L7/033 ,  H04L27/26

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first time indication indicating a first time TS1, a second time indication indicating a second time TS2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time TS3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time TS4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter   offset = ( TS   1 + TS   4 - TS   3 - TS   2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US10855569B2

公开(公告)日：2020-12-01

申请号：US16566747

申请日：2019-09-10

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic ,  Tadej Markovic

IPC: H04L12/26 ,  H04L12/855 ,  H04L27/26 ,  H04J3/06 ,  H04W56/00

Abstract: An example method comprises receiving, by a first PHY of a first transceiver, a timing packet, timestamping, by the first transceiver, the timing packet and providing the timing packet to a first intermediate node, determining a first offset between the first intermediate node and the first transceiver, updating a first field within the timing packet with the first offset between the first intermediate node and the first transceiver, the offset being in the direction of the second transceiver, receiving the timing packet by a second transceiver, the timing packet including the first field, information within the first field being at least based on the first offset, determining a second offset between the second transceiver and an intermediate node that provided the timing packet to the second transceiver and correcting a time of the second transceiver based on the information within the first field and the second offset.

公开(公告)号：US20200305160A1

公开(公告)日：2020-09-24

申请号：US16866830

申请日：2020-05-05

Applicant: Aviat U.S., Inc.

Inventor： Chaoming Zeng

IPC: H04W72/04 ,  H04L1/00 ,  H04W28/02 ,  H04L12/911 ,  H04W24/08

Abstract: An example system comprises a router configured to receive a bandwidth update associated with a change in bandwidth over a wireless channel, determine if the change in bandwidth identified in the bandwidth update results in bandwidth being over-reserved at at least one priority level, previously reserved bandwidth of the wireless channel being associated with a plurality of different priority levels, the previously reserved bandwidth being previously reserved based on a plurality of path requests from a head end router, each path request including at least one priority level and a bandwidth reservation request, if the change in bandwidth results in bandwidth being over-reserved, then preempt a lowest priority path request, based in the preemption of the lowest priority path request, update reserved bandwidth of the wireless channel of at least one priority level, and provide a message to the head end router regarding the change of bandwidth.

公开(公告)号：US20190052402A1

公开(公告)日：2019-02-14

申请号：US16162283

申请日：2018-10-16

Applicant: Aviat U.S., Inc.

Inventor： Sergio Licardie ,  Rishipal Arya ,  Robert Brown

IPC: H04L1/00 ,  H03M13/47 ,  H04B7/08 ,  H03M13/37 ,  H04L1/02 ,  H04B7/10

Abstract: A frame error correction circuit may identify and correct errors in data frames provided to a receiver as part of a diversity communications scheme. The frame error correction circuit may further align the data frames so that the data frames can be compared. The frame error correction circuit may perform a bit-wise comparison of the data frames and identify inconsistent bit positions where bits in the data frames differ from one another. Once inconsistent bit positions have been identified, the frame error correction circuit may access a permutation table of permutations of bits at the inconsistent bit positions. In some implementations, the frame error correction circuit uses the permutation table to reassemble permutations of the data frames. In various implementations, the frame error correction circuit performs a CRC of each permutation of the data frames, and provides a valid permutation to a network.

公开(公告)号：US20190028383A1

公开(公告)日：2019-01-24

申请号：US16141879

申请日：2018-09-25

Applicant: Aviat U.S., Inc.

Inventor： Chaoming Zeng ,  Sergio Licardie

IPC: H04L12/709 ,  H04W24/04 ,  H04L12/891 ,  H04B7/10 ,  H04L29/06 ,  H04W76/15 ,  H04L12/721 ,  H04L12/46 ,  H04L1/00 ,  H04L29/08

CPC classification number: H04L45/245 ,  H04B7/10 ,  H04L1/00 ,  H04L12/4633 ,  H04L45/66 ,  H04L47/41 ,  H04L69/14 ,  H04L69/323 ,  H04L2212/00 ,  H04W24/04 ,  H04W76/15

Abstract: A first layer one link aggregation master comprises a first port coupled to receive customer traffic; a first channel; a second channel; an aggregation engine coupled to the first and second channels; a first switch circuit coupled to the first port and to the first channel, and configured to communicate the customer traffic from the first port over the first channel to the aggregation engine, the aggregation engine including a splitter circuit configured to use layer one information to segment at least a portion of the customer traffic into a first virtual container and a second virtual container, the aggregation engine further including an encapsulation circuit configured to encapsulate the second virtual container using Ethernet standards for transport over the second channel; a radio access card configured to generate an air frame based on the first virtual container for wireless transmission over a first wireless link of a link aggregation group to the receiver; and a second switch circuit coupled to the second channel, and configured to communicate the Ethernet-encapsulated second virtual container over an Ethernet cable to a slave for wireless transmission over a second wireless link of the link aggregation group to the receiver.

公开(公告)号：US20180294869A1

公开(公告)日：2018-10-11

申请号：US16004328

申请日：2018-06-08

Applicant: Aviat U.S., Inc.

Inventor： Paul A. Kennard

IPC: H04B7/155

Abstract: Various embodiments provide for systems, methods, or apparatuses that provide a fronthaul architecture that facilitates high fidelity and low latency communication between a radio processing unit, such as a baseband unit (BBU), which may be located a central office (CO), and a remote transceiver, which may comprise a remote radio head (RRH) or a remote radio unit (RRU), which may be located at remote cell site.

公开(公告)号：US20180198573A1

公开(公告)日：2018-07-12

申请号：US15806065

申请日：2017-11-07

Applicant: Aviat U.S., Inc.

Inventor： Emerick Vann ,  Yen-Fang Chao ,  Youming Qin ,  Roland Matian

IPC: H04L1/20 ,  H04L27/38 ,  H04L1/00 ,  H04B1/30 ,  H03C3/40 ,  H04B1/16 ,  H04B1/28 ,  H04B1/00 ,  H03D7/16 ,  H03D3/00 ,  H04B1/10

CPC classification number: H04L1/206 ,  H03C3/406 ,  H03D3/009 ,  H03D7/168 ,  H04B1/0014 ,  H04B1/10 ,  H04B1/16 ,  H04B1/28 ,  H04B1/30 ,  H04L1/0036 ,  H04L1/203 ,  H04L1/208 ,  H04L27/38 ,  H04L27/3854

Abstract: Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase (“I”) signal and a quadrature (“Q”) signal, an I/Q signal adjustor that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.

公开(公告)号：US09912465B2

公开(公告)日：2018-03-06

申请号：US15138172

申请日：2016-04-25

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic

IPC: G06F1/04 ,  G06F1/24 ,  G06F11/00 ,  H04L7/00 ,  G06F1/12 ,  H04J3/06 ,  G06F1/10 ,  H04L12/26

CPC classification number: H04L7/0033 ,  G06F1/10 ,  G06F1/12 ,  H04J3/0667 ,  H04L43/0852

Abstract: An exemplary method of synchronizing a master clock and a slave clock comprises transmitting a plurality of packets between a master device and a slave device, calculating a first skew between a first pair of the plurality of packets at the slave device and a second skew between the first pair at the master device, calculating a ratio between the first skew and the second skew, providing a slave clock frequency correction to the slave device, calculating a first packet trip delay using a time that the master device initiates sending a packet to the slave device, a time the master device receives a response from the slave device, a corrected time the slave device receives the packet, and a corrected time the slave device initiates sending the response, calculating a first offset based on the first packet trip delay, and providing the first offset to the slave device.