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1.发明申请公开(公告)号：US20170201330A1
公开(公告)日：2017-07-13
申请号：US14991826
申请日：2016-01-08
Applicant: Google Inc.
Inventor： Xiang Zhou , Ryohei Urata , Erji Mao , Hong Liu , Christopher Lyle Johnson
IPC: H04B10/69
CPC classification number: H04B10/6971 , H04B10/697
Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of interference signals on optical signals received at a direct-detection optical receivers. The optical receivers are capable of attenuating interference noise signals resulting from the interference between a transmitted optical signal transmitted from a transmitter to the optical receiver and one or more additional signals received at the optical receiver. The interference can be due to multi-path interference or due to in-band interference. The receivers include a tunable filter for filtering the received optical signal to remove the interference. A frequency offset module processes the received optical signal to determine a frequency offset indicative of the difference between the carrier frequencies of a modulated optical signal and an interference optical signal. The offset frequency and a bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interference signal from the received signal.
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公开(公告)号：US09473833B2
公开(公告)日：2016-10-18
申请号：US14986016
申请日：2015-12-31
Applicant: Google Inc.
Inventor： Ryohei Urata , Hong Liu , Amin Vahdat , Christopher Lyle Johnson , Junlan Zhou , Alexander Shraer
CPC classification number: H04Q11/0005 , G06F13/4022 , H04Q11/0062 , H04Q2011/0015 , H04Q2011/0052 , Y02D10/14 , Y02D10/151
Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch, first and second upper level switches, and first and second passive optical splitters, and a mirror. The first passive optical splitter can have a first port directly coupled to the first upper level switch, a second port directly coupled to the second upper level switch. The second passive optical splitter can have a port directly coupled to a port of the first passive optical splitter, and a port directly coupled to the first lower level switch. The mirror can be coupled to a port of the second passive optical splitter and reflect an optical signal received from the second passive optical splitter to the first upper level switch and second upper level switch through the second passive optical splitter and the first passive optical splitter.
Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括第一下级开关，第一和第二上级开关以及第一和第二无源分光器以及反射镜。 第一无源分光器可以具有直接耦合到第一上级开关的第一端口，直接耦合到第二上级开关的第二端口。 第二无源光分路器可以具有直接耦合到第一无源分光器的端口的端口，以及直接耦合到第一下级开关的端口。 反射镜可以耦合到第二无源光分路器的端口，并且将从第二无源光分路器接收的光信号反射到通过第二无源分光器和第一无源分光器的第一上级开关和第二上级开关。
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公开(公告)号：US20160119696A1
公开(公告)日：2016-04-28
申请号：US14986016
申请日：2015-12-31
Applicant: Google Inc.
Inventor： Ryohei Urata , Hong Liu , Amin Vahdat , Christopher Lyle Johnson , Junlan Zhou , Alexander Shraer
IPC: H04Q11/00
CPC classification number: H04Q11/0005 , G06F13/4022 , H04Q11/0062 , H04Q2011/0015 , H04Q2011/0052 , Y02D10/14 , Y02D10/151
Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch, first and second upper level switches, and first and second passive optical splitters, and a mirror. The first passive optical splitter can have a first port directly coupled to the first upper level switch, a second port directly coupled to the second upper level switch. The second passive optical splitter can have a port directly coupled to a port of the first passive optical splitter, and a port directly coupled to the first lower level switch. The mirror can be coupled to a port of the second passive optical splitter and reflect an optical signal received from the second passive optical splitter to the first upper level switch and second upper level switch through the second passive optical splitter and the first passive optical splitter.
Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括第一下级开关，第一和第二上级开关以及第一和第二无源分光器以及反射镜。 第一无源分光器可以具有直接耦合到第一上级开关的第一端口，直接耦合到第二上级开关的第二端口。 第二无源光分路器可以具有直接耦合到第一无源分光器的端口的端口，以及直接耦合到第一下级开关的端口。 反射镜可以耦合到第二无源光分路器的端口，并且将从第二无源光分路器接收的光信号反射到通过第二无源分光器和第一无源分光器的第一上级开关和第二上级开关。
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公开(公告)号：US20180081816A1
公开(公告)日：2018-03-22
申请号：US15273433
申请日：2016-09-22
Applicant: Google Inc.
Inventor： Joel Dylan Coburn , Albert Borchers , Christopher Lyle Johnson , Robert S. Sprinkle
IPC: G06F12/0868 , G06F12/0871 , G06F12/0873 , G06F12/12 , G06F12/1009 , G06F12/1027
CPC classification number: G06F12/0868 , G06F12/023 , G06F12/04 , G06F12/0815 , G06F12/0871 , G06F12/0873 , G06F12/1009 , G06F12/1027 , G06F12/12 , G06F2212/1016 , G06F2212/1024 , G06F2212/152 , G06F2212/3042 , G06F2212/305 , G06F2212/604 , G06F2212/652
Abstract: Methods, systems, and apparatus for receiving a request to access, from a main memory, data contained in a first portion of a first page of data, the first page of data having a first page size; initiating a page fault based on determining that the first page of data is not stored in the main memory; allocating a portion of the main memory equivalent to the first page size; transferring the first portion of the first page of data from the secondary memory to the allocated portion of the main memory without transferring the entire first page of data; and updating a first page table entry associated with the first portion of the first page of data to point to a location of the allocated portion of the main memory to which the first portion of the first page of data is transferred.
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公开(公告)号：US09692521B1
公开(公告)日：2017-06-27
申请号：US14793433
申请日：2015-07-07
Applicant: Google Inc.
Inventor： Xiang Zhou , Ryohei Urata , Christopher Lyle Johnson
IPC: H04J14/06 , H04B10/58 , H04B10/2507 , H04B10/556
CPC classification number: H04B10/58 , H04B10/2507 , H04B10/2572 , H04B10/532 , H04B10/556 , H04J14/06
Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of an optical link in a communication system on polarization angles of signals transmitted over the optical link. The communication system can include an optical transmitter transmitting polarization-division multiplexed (PDM) optical signals over the optical link and a direct-detection receiver for receiving the PDM optical signals. The transmitter can include a polarization compensation unit for receiving estimated values of link polarization parameters from the receiver. The receiver uses the estimated values to pre-distort modulator drive and bias signals and to adjust the relative phase between modulated optical signals. The transmitter can also transmit training optical signals to the receiver over the optical link. The receiver uses the training optical signals to estimate the values of link polarization parameters. The receiver also can include a crosstalk mitigation unit for mitigating effects of crosstalk between the PDM optical signals.
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Patent Agency Ranking
公开(公告)号：US09247326B2
公开(公告)日：2016-01-26
申请号：US14169734
申请日：2014-01-31
Applicant: Google Inc.
Inventor： Ryohei Urata , Hong Liu , Amin Vahdat , Christopher Lyle Johnson , Junlan Zhou , Alexander Shraer
CPC classification number: H04Q11/0005 , G06F13/4022 , H04Q11/0062 , H04Q2011/0015 , H04Q2011/0052 , Y02D10/14 , Y02D10/151
Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch having a first port and a second port. The computer network can include a second lower level switch having a first port and a second port. The computer network can include an upper level switch having respective ports directly coupled to ports of the first and second lower level switches. A third port of the upper level switch can couple to a first port of a passive optical splitter. The passive optical splitter can have second and third ports coupled to respective ports of the first and second lower level switches. The passive optical splitter can be configured to transmit signals received at its first port as output signals on both of its second and third ports.
Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括具有第一端口和第二端口的第一下级开关。 计算机网络可以包括具有第一端口和第二端口的第二下层开关。 计算机网络可以包括具有直接耦合到第一和第二下级交换机的端口的相应端口的上级交换机。 上级开关的第三端口可以耦合到无源分光器的第一端口。 无源光分路器可以具有耦合到第一和第二下层开关的相应端口的第二和第三端口。 无源光分路器可以被配置为将在其第一端口处接收的信号作为其第二和第三端口两端的输出信号进行发送。
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7.发明授权公开(公告)号：US09998235B2
公开(公告)日：2018-06-12
申请号：US14991826
申请日：2016-01-08
Applicant: Google Inc.
Inventor： Xiang Zhou , Ryohei Urata , Erji Mao , Hong Liu , Christopher Lyle Johnson
CPC classification number: H04B10/6971 , H04B10/697
Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of interference signals on optical signals received at a direct-detection optical receivers. The optical receivers are capable of attenuating interference noise signals resulting from the interference between a transmitted optical signal transmitted from a transmitter to the optical receiver and one or more additional signals received at the optical receiver. The interference can be due to multi-path interference or due to in-band interference. The receivers include a tunable filter for filtering the received optical signal to remove the interference. A frequency offset module processes the received optical signal to determine a frequency offset indicative of the difference between the carrier frequencies of a modulated optical signal and an interference optical signal. The offset frequency and a bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interference signal from the received signal.
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公开(公告)号：US20180046411A1
公开(公告)日：2018-02-15
申请号：US15236171
申请日：2016-08-12
Applicant: Google Inc.
Inventor： Joel Dylan Coburn , Albert Borchers , Christopher Lyle Johnson , Robert S. Sprinkle
IPC: G06F3/06 , G06F12/0815 , G06F12/0811
CPC classification number: G06F3/0685 , G06F3/0619 , G06F3/065 , G06F12/0811 , G06F12/0815 , G06F12/0835 , G06F12/0868 , G06F12/1009 , G06F12/1081 , G06F2212/1021 , G06F2212/283 , G06F2212/621
Abstract: Methods, systems, and apparatus for receiving a request to access, from a main memory, a first cache line of a page of data; determining that the first cache line is not stored in the main memory and is stored in a secondary memory, and in response: transferring the first cache line of the page of data from the secondary memory to the main memory without transferring the entire page of data, wherein a remaining portion of the page of data remains stored in the secondary memory; updating a page table entry associated with the page of data to point to a location of the page of data in the main memory; and transferring the remaining portion of the page of data from the secondary memory to the main memory.
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公开(公告)号：US20180046378A1
公开(公告)日：2018-02-15
申请号：US15235495
申请日：2016-08-12
Applicant: Google Inc.
Inventor： Joel Dylan Coburn , Albert Borchers , Christopher Lyle Johnson , Robert S. Sprinkle
IPC: G06F3/06 , G06F12/123 , G06F12/1009
CPC classification number: G06F12/1009 , G06F12/121 , G06F2212/1024 , G06F2212/1032 , G06F2212/152 , G06F2212/657
Abstract: Methods, systems, and apparatus for determining whether an access bit is set for each page table entry of a page table based on a scan of the page table with at least one page table walker, the access bit indicating whether a page associated with the page table entry was accessed in a last scan period; incrementing a count for each page in response to determining that the access bit is set for the page table entry associated with the page; resetting the access bit after determining whether the access bit is set for each page table entry; receiving a request to access, from a main memory, a first page of data; initiating a page fault based on determining that the first page of data is not stored in the main memory; and servicing the page fault with a DMA engine.
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公开(公告)号：US20150222969A1
公开(公告)日：2015-08-06
申请号：US14169734
申请日：2014-01-31
Applicant: Google Inc.
Inventor： Ryohei Urata , Hong Liu , Amin Vahdat , Christopher Lyle Johnson , Junlan Zhou , Alexander Shraer
IPC: H04Q11/00
CPC classification number: H04Q11/0005 , G06F13/4022 , H04Q11/0062 , H04Q2011/0015 , H04Q2011/0052 , Y02D10/14 , Y02D10/151
Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch having a first port and a second port. The computer network can include a second lower level switch having a first port and a second port. The computer network can include an upper level switch having respective ports directly coupled to ports of the first and second lower level switches. A third port of the upper level switch can couple to a first port of a passive optical splitter. The passive optical splitter can have second and third ports coupled to respective ports of the first and second lower level switches. The passive optical splitter can be configured to transmit signals received at its first port as output signals on both of its second and third ports.
Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括具有第一端口和第二端口的第一下级开关。 计算机网络可以包括具有第一端口和第二端口的第二下层开关。 计算机网络可以包括具有直接耦合到第一和第二下级交换机的端口的相应端口的上级交换机。 上级开关的第三端口可以耦合到无源分光器的第一端口。 无源光分路器可以具有耦合到第一和第二下层开关的相应端口的第二和第三端口。 无源光分路器可以被配置为将在其第一端口处接收的信号作为其第二和第三端口两端的输出信号进行发送。
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