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    RE-TIMING A PACKETIZED RADIO FLOW TO CLEAN NOISE INDUCED BY PACKET DELAY VARIATION OF A PACKET NETWORK
    21.
    发明申请
    RE-TIMING A PACKETIZED RADIO FLOW TO CLEAN NOISE INDUCED BY PACKET DELAY VARIATION OF A PACKET NETWORK 有权

    公开(公告)号：US20210075532A1

    公开(公告)日：2021-03-11

    申请号：US16751509

    申请日：2020-01-24

    Applicant: Cisco Technology, Inc.

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

    IPC: H04J3/06 ,  H04L29/06

    Abstract: Techniques are described to provide for re-timing a packetized radio flow to clean noise induced by packet delay variation of a packet network. In one example, a method includes receiving, at a first node of a fronthaul network, a Radio over Ethernet (RoE) frame transmitted by a second node in which the RoE frame comprises a Common Public Radio Interface (CPRI) bit stream associated with a first radio device, a sequence number, and a first time stamp. The method may further include generating a second time stamp by the first node upon obtaining the RoE frame; calculating an induced delay value based, at least in part, on the first time stamp and the second time stamp; calculating a re-timing value based on a re-timing interval and the induced delay value; and transmitting the CPRI bit stream to a second radio device based on the re-timing value.

    LINK FAULT HANDLING IN FRONTHAUL COMMUNICATION NETWORKS
    22.
    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
    23.
    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.

    Migrating logical volumes from a thick provisioned layout to a thin provisioned layout
    26.
    发明授权
    Migrating logical volumes from a thick provisioned layout to a thin provisioned layout 有权

    公开(公告)号：US11385947B2

    公开(公告)日：2022-07-12

    申请号：US17103061

    申请日：2020-11-24

    Applicant: Cisco Technology, Inc.

    Inventor： Nivin Lawrence ,  Sandesh K. Rao ,  Manikandan Veerachamy ,  Amit Chandra ,  Tushar Sinha ,  Manoj Kumar ,  David W. Duffey

    IPC: G06F12/10 ,  G06F9/54

    Abstract: The present disclosure is directed to migrating logical volumes from a thick provisioned layout to a thin provisioned layout, and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations comprising creating an abstraction layer on top of a logical volume in a storage device, the abstraction layer for accessing the logical volume, the logical volume one of a plurality of logical volumes in a volume group of the storage device; allocating a thin pool from remaining storage space in the volume group of the storage device; creating a snapshot of the logical volume; adding a thin virtual volume corresponding to the logical volume to the thin pool; and copying data from the snapshot to the thin virtual volume.

    Re-timing a packetized radio flow to clean noise induced by packet delay variation of a packet network
    29.
    发明授权
    Re-timing a packetized radio flow to clean noise induced by packet delay variation of a packet network 有权

    公开(公告)号：US11095384B2

    公开(公告)日：2021-08-17

    申请号：US16751509

    申请日：2020-01-24

    Applicant: Cisco Technology, Inc.

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

    IPC: H04L29/06 ,  H04J3/06

    Abstract: Techniques are described to provide for re-timing a packetized radio flow to clean noise induced by packet delay variation of a packet network. In one example, a method includes receiving, at a first node of a fronthaul network, a Radio over Ethernet (RoE) frame transmitted by a second node in which the RoE frame comprises a Common Public Radio Interface (CPRI) bit stream associated with a first radio device, a sequence number, and a first time stamp. The method may further include generating a second time stamp by the first node upon obtaining the RoE frame; calculating an induced delay value based, at least in part, on the first time stamp and the second time stamp; calculating a re-timing value based on a re-timing interval and the induced delay value; and transmitting the CPRI bit stream to a second radio device based on the re-timing value.

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