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    LINK FAULT HANDLING IN FRONTHAUL COMMUNICATION NETWORKS
    21.
    发明申请
    LINK FAULT HANDLING IN FRONTHAUL COMMUNICATION NETWORKS 有权

    公开(公告)号：US20210051494A1

    公开(公告)日：2021-02-18

    申请号：US16543344

    申请日：2019-08-16

    Applicant: Cisco Technology, Inc.

    Inventor： Prashant Anand ,  Manoj Kumar ,  Sudhir Kayamkulangara ,  Manigandan Boopalan ,  Dinuraj K.

    IPC: H04W24/04 ,  H04L12/24

    Abstract: In a fronthaul network system, when a CPRI link fault is detected at either of the REC or RE, both the REC and RE perform a Layer 1 synchronization. The fault may be a loss of signal, loss of frame, or a line code violation, which also translates to a loss of signal if seen beyond a threshold. A proxy slave recognizes the fault in a CPRI signal from a first radio device and inserts the fault alarm into a header of a radio over Ethernet frame. The proxy slave continues to communicate the signal for a configured number of hyper-frames. A proxy master receives the signal and communicates the signal and the fault alarm to a receiving radio device for a configured number of hyper-frames. The proxy and radio devices all perform a joint resynchronization.

    LINK ESTABLISHMENT BETWEEN A RADIO EQUIPMENT CONTROLLER (REC) AND RADIO EQUIPMENT (RE) IN A FRONTHAUL NETWORK
    22.
    发明申请
    LINK ESTABLISHMENT BETWEEN A RADIO EQUIPMENT CONTROLLER (REC) AND RADIO EQUIPMENT (RE) IN A FRONTHAUL NETWORK 审中-公开

    公开(公告)号：US20200252893A1

    公开(公告)日：2020-08-06

    申请号：US16435974

    申请日：2019-06-10

    Applicant: Cisco Technology, Inc.

    Inventor： Prashant Anand ,  Manoj Kumar ,  Sudhir Kayamkulangara ,  Dinuraj K ,  Manigandan Boopalan

    IPC: H04W56/00 ,  H04W76/10

    Abstract: Techniques associated with link establishment in a fronthaul network are described herein. In one embodiment, a method includes receiving, by a proxy node, a Common Public Radio Interface (CPRI) bit stream transmitted by a radio equipment controller, wherein the CPRI bit stream is transmitted within a transmit time interval of the radio equipment controller; and fast-sampling, by the proxy node, the CPRI bit stream to determine whether a hyper frame number synchronization with the radio equipment controller at a common matching link bit rate is achievable, wherein the fast-sampling comprises attempting to decode the received CPRI bit stream and achieve the hyper frame number synchronization for each of a plurality of link bit rates configured for a fast-sampling time period during at least one fast-sampling time interval configured for the proxy node.

    Network Incident Identification Based On Characterizing Relationships Between Interfaces And Events As Graphical Component Relationships
    27.
    发明申请
    Network Incident Identification Based On Characterizing Relationships Between Interfaces And Events As Graphical Component Relationships 审中-公开

    公开(公告)号：US20180287855A1

    公开(公告)日：2018-10-04

    申请号：US15662112

    申请日：2017-07-27

    Applicant: Cisco Technology, Inc.

    Inventor： Guru Parthibhan Paramaguru ,  Prashant Anand ,  Vasudevan Visvanathan ,  Sundar Ramakrishnan ,  Dharmarajan Subramanian ,  Rohit Kumar Gupta ,  Abhishek Chaudhary

    IPC: H04L12/24

    Abstract: Techniques for use in network incident identification are described. In response to an occurrence of an unknown network incident, a plurality of log messages (e.g. syslog messages) are received from a plurality of network components in one or more networks. In one illustrative example, a plurality of relationships between interfaces and events are derived from the received log messages and characterized as a plurality of graphical component relationships. One or more groups of connected components are determined from the graphical component relationships and network component connection data which indicate interface relationships of the network components. Here, groups of connected components may be logically joined based on the network component connection data indicating one or more interface relationships. A network incident may then be identified based on at least one of the determined groups of connected components being associated with at least one identified set of events that has the closest or substantial match with at least one predetermined set of events associated with the network incident.

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