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公开(公告)号：US20150207714A1
公开(公告)日：2015-07-23
申请号：US14425771
申请日：2012-09-24
发明人： Stefano Ruffini , Bjorn Pohlman
CPC分类号： H04L43/0864 , H04J3/065 , H04J3/0682 , H04J3/1652 , H04J2203/0082
摘要： Communication between a Radio Equipment Control (REC) and a Radio Equipment (RE) in a wireless network uses a Common Public Radio Interface connection. When the Radio Equipment Control and the Radio Equipment are located remote from each other, and are connected by an asymmetric transport network, such as an Optical Transport Network, path delay data is transmitted in the Common Public Radio Interface data frames. This allows the CPRI end nodes to correct for path delay asymmetry using the path delay data.
摘要翻译： 无线设备控制（REC）和无线设备（RE）之间的通信使用公共无线电接口连接。 当无线电设备控制和无线电设备彼此远离并且通过诸如光传输网络的非对称传输网络连接时，在公共无线电接口数据帧中传送路径延迟数据。 这允许CPRI端节点使用路径延迟数据来校正路径延迟不对称性。
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公开(公告)号：US10148539B2
公开(公告)日：2018-12-04
申请号：US14425771
申请日：2012-09-24
发明人： Stefano Ruffini , Bjorn Pohlman
摘要： Communication between a Radio Equipment Control (REC) and a Radio Equipment (RE) in a wireless network uses a Common Public Radio Interface connection. When the Radio Equipment Control and the Radio Equipment are located remote from each other, and are connected by an asymmetric transport network, such as an Optical Transport Network, path delay data is transmitted in the Common Public Radio Interface data frames. This allows the CPRI end nodes to correct for path delay asymmetry using the path delay data.
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公开(公告)号：US10075253B2
公开(公告)日：2018-09-11
申请号：US14905688
申请日：2015-02-20
发明人： Mikael Olofsson , Stefano Ruffini
IPC分类号： H04J3/08 , H04J3/06 , H04L12/841 , H04L12/26
CPC分类号： H04J3/0673 , H04L43/0858 , H04L43/10 , H04L47/28 , H04L47/283
摘要： Method and arrangement for providing delay information to synchronization packets passing a transport network node. In a transport network node synchronization packets propagate from a synchronization master node towards boundary clock nodes. The synchronization packets pass the transport network node, in which the synchronization packets are received, and a level of delay is determined. Furthermore, when the level of delay for the synchronization packets is above a threshold, the synchronization packets are marked with a delay indication. The received synchronization packets are sent to the boundary clock node or ordinary clock node, whether or not they are marked. By implementing functionality for determining a level of delay of synchronization packets, and marking passing synchronization packets with delay indications, boundary clock nodes and ordinary clock nodes may differentiate the received synchronization packets based on the delay identifications. Thereby, improved accuracy may be achieved when calculating time synchronization offsets.
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公开(公告)号：US09960873B2
公开(公告)日：2018-05-01
申请号：US14768356
申请日：2013-02-22
发明人： Qingfeng Yang , Francesco Pasio , Zhendong Lei , Stefano Ruffini
CPC分类号： H04J3/0697 , H04J3/0667 , H04L7/0087 , H04L7/0331
摘要： A pluggable transceiver module (200) comprising a line receiver (208) connected to a unit interface transmitter (202), a line transmitter (206) connected to a unit interface receiver (204) and a timestamp counter (210) adapted to generate counter values based on clock signals received from an external source and to send the counter values to the line transmitter (206) and to the line receiver (208). The line transmitter (206) and the line receiver (208) are adapted to associate timing packets in a stream of data packets transmitted and received by the pluggable transceiver module (200) with counter values output by the timestamp counter (210).
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公开(公告)号：US09705770B2
公开(公告)日：2017-07-11
申请号：US14874873
申请日：2015-10-05
发明人： Fabio Cavaliere , Giulio Bottari , Luca Giorgi , Stefano Ruffini
IPC分类号： H04L12/26 , H04Q11/00 , H04B10/077 , H04B10/079 , H04J3/06 , H04B10/07 , H04J14/02
CPC分类号： H04L43/0864 , H04B10/07 , H04B10/0775 , H04B10/0795 , H04B2210/072 , H04B2210/078 , H04J3/0667 , H04J14/0201 , H04J14/021 , H04J14/0226 , H04J14/0267 , H04J14/0273 , H04J14/0275 , H04Q11/0066 , H04Q2011/0083
摘要： A method for measuring asymmetry in propagation delay of first and second links which connect a first node to a second node of a communication network. The method comprises measuring (101) a round trip delay of the first link. The round trip delay can be measured by transmitting (102) a test signal from the first node to the second node over the first link and receiving a reply to the test signal from the second node over the first link. The method further comprises measuring (105) a round trip delay of the second link. The round trip delay can be measured by transmitting (106) a test signal to the second node over the second link and receiving a reply to the test signal from the second node over the second link. A difference in the propagation delay of the first link with respect to the second link is determined (109) using the measured round trip delays of the first link and the second link.
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公开(公告)号：US20160105341A1
公开(公告)日：2016-04-14
申请号：US14874873
申请日：2015-10-05
发明人： Fabio Cavaliere , Giulio Bottari , Luca Giorgi , Stefano Ruffini
IPC分类号： H04L12/26 , H04Q11/00 , H04B10/077
CPC分类号： H04L43/0864 , H04B10/07 , H04B10/0775 , H04B10/0795 , H04B2210/072 , H04B2210/078 , H04J3/0667 , H04J14/0201 , H04J14/021 , H04J14/0226 , H04J14/0267 , H04J14/0273 , H04J14/0275 , H04Q11/0066 , H04Q2011/0083
摘要： A method for measuring asymmetry in propagation delay of first and second links which connect a first node to a second node of a communication network. The method comprises measuring (101) a round trip delay of the first link. The round trip delay can be measured by transmitting (102) a test signal from the first node to the second node over the first link and receiving a reply to the test signal from the second node over the first link. The method further comprises measuring (105) a round trip delay of the second link. The round trip delay can be measured by transmitting (106) a test signal to the second node over the second link and receiving a reply to the test signal from the second node over the second link. A difference in the propagation delay of the first link with respect to the second link is determined (109) using the measured round trip delays of the first link and the second link.
摘要翻译： 一种用于测量将第一节点连接到通信网络的第二节点的第一和第二链路的传播延迟不对称的方法。 该方法包括测量（101）第一链路的往返延迟。 可以通过在第一链路上将测试信号从第一节点发送（102）到第二节点（102）并通过第一链路接收来自第二节点的测试信号的答复来测量往返延迟。 该方法还包括测量（105）第二链路的往返延迟。 可以通过在第二链路上向第二节点发送（106）测试信号（106）并通过第二链路从第二节点接收对测试信号的回复来测量往返延迟。 使用所测量的第一链路和第二链路的往返延迟来确定第一链路相对于第二链路的传播延迟的差异（109）。
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公开(公告)号：US09295018B1
公开(公告)日：2016-03-22
申请号：US14420969
申请日：2014-12-17
发明人： Stefano Ruffini , Mats Forsman , Tomas Thyni
CPC分类号： H04W56/001 , H04J3/0641 , H04J3/0658 , H04L7/0008 , H04W56/0015 , H04W84/042
摘要： A synchronization module is associated with a network node of a communication network which comprises at least one Synchronization Master entity. The synchronization module has knowledge of a plurality of Synchronization Master references. Endpoints of paths of the plurality of Synchronization Master references are obtained. Each of the paths extends between one Synchronization Master Entity and the first or the second access network node. The paths are obtained from a synchronization report module based on the obtained endpoints. For each of the Synchronization Master references, a first path and a second path of the obtained paths are selected. A time synchronization inaccuracy value between the first and the second access network node is calculated based on the selected paths. A Synchronization Master reference is selected based on the calculated time synchronization inaccuracy values, and the first and the second access network node are notified which Synchronization Master reference was selected.
摘要翻译： 同步模块与包括至少一个同步主实体的通信网络的网络节点相关联。 同步模块具有多个同步主引用的知识。 获得多个同步主引用的路径的端点。 每个路径在一个同步主机实体和第一或第二接入网络节点之间延伸。 基于获得的端点从同步报告模块获得路径。 对于每个同步主引用，选择所获得的路径的第一路径和第二路径。 基于所选择的路径来计算第一和第二接入网络节点之间的时间同步不准确性值。 基于计算出的时间同步不精确度值选择同步主引用，并通知第一和第二访问网络节点选择了哪个同步主引用。
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公开(公告)号：US10361962B2
公开(公告)日：2019-07-23
申请号：US14909885
申请日：2015-11-09
发明人： Balázs Varga , János Farkas , Stefano Ruffini
IPC分类号： H04L12/26 , H04L12/851 , H04L12/823 , H04L12/891 , H04L12/721 , H04L12/717 , H04L12/841 , H04L12/801
摘要： A method performed by a network element that transfers first and second packet flows of the same traffic handling class comprises the step of receiving, from a network controller, information defining a relative forwarding order between first and second packet flow packets. Upon receipt, at least one ingress port of the network element, of a first and a second packet, determining that the first packet belongs to the first packet flow and the second packet to the second packet flow. The first and second packets will then be forwarded towards at least one egress port of the network element in an order defined by the information received from the network controller.
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公开(公告)号：US10080205B2
公开(公告)日：2018-09-18
申请号：US14771120
申请日：2015-07-06
发明人： Paola Iovanna , Mats Forsman , Stefano Ruffini , Tomas Thyni
CPC分类号： H04W56/0015 , H04J3/0641 , H04J3/0667 , H04W72/0446
摘要： A backhaul domain of the communication network is determined 400, and a request for a synchronization reference is received 402 from the first access node, the request comprising, ID:s of the first and second access nodes. For each one of the first and second access nodes, a first and a second combination are determined 404 of a first and a second respective synchronization reference and related synchronization paths extending between synchronization reference nodes of the synchronization references and the access nodes. For each one of the first and second access nodes, the first or the second combination of synchronization reference and related synchronization path is selected 406 based on synchronization requirements for the first and second access nodes, and the first path or the second path is requested to be set-up 408 according to the selected 406 combination.By providing functionality which works on the top of existing control of radio and transport domains, appropriate synchronization references may be determined with a limited amount of information exchanged between the respective domains.
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公开(公告)号：US20170142676A1
公开(公告)日：2017-05-18
申请号：US14771120
申请日：2015-07-06
发明人： Paola Iovanna , Mats Forsman , Stefano Ruffini , Tomas Thyni
CPC分类号： H04W56/0015 , H04J3/0641 , H04J3/0667 , H04W72/0446
摘要： A backhaul domain of the communication network is determined 400, and a request for a synchronisation reference is received 402 from the first access node, the request comprising, ID:s of the first and second access nodes. For each one of the first and second access nodes, a first and a second combination are determined 404 of a first and a second respective synchronisation reference and related synchronisation paths extending between synchronisation reference nodes of the synchronisation references and the access nodes. For each one of the first and second access nodes, the first or the second combination of synchronisation reference and related synchronisation path is selected 406 based on synchronisation requirements for the first and second access nodes, and the first path or the second path is requested to be set-up 408 according to the selected 406 combination.By providing functionality which works on the top of existing control of radio and transport domains, appropriate synchronisation references may be determined with a limited amount of information exchanged between the respective domains.
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