公开(公告)号：US20190173691A1

公开(公告)日：2019-06-06

申请号：US16262444

申请日：2019-01-30

Applicant: Cisco Technology, Inc.

Inventor： David S. KLOPER ,  Brian D. HART ,  Dipankar B. ACHARYA

IPC: H04L12/64 ,  H04L12/46 ,  H04W16/02

Abstract: The present disclosure discloses a distributed system. The distributed system includes a plurality of radio heads and a plurality of controllers disposed in one or more chassis external to the plurality of radio heads. Each of the plurality of controllers includes a baseband unit (BBU), an uplink time-division multiplexing (TDM) switch and a downlink TDM switch. The uplink TDM switch and the downlink TDM switch forward data bits between a radio head and a BBU by using TDM cells which may reduce latency relative to using Ethernet frames.

公开(公告)号：US20190036737A1

公开(公告)日：2019-01-31

申请号：US15660905

申请日：2017-07-26

Applicant: Cisco Technology, Inc.

Inventor： David S. KLOPER ,  Brian D. HART ,  Dipankar B. ACHARYA

IPC: H04L12/64 ,  H04L12/46 ,  H04W16/02

Abstract: The present disclosure discloses a distributed system. The distributed system includes a plurality of radio heads and a plurality of controllers disposed in one or more chassis external to the plurality of radio heads. Each of the plurality of controllers includes a baseband unit (BBU), an uplink time-division multiplexing (TDM) switch and a downlink TDM switch. The uplink TDM switch and the downlink TDM switch forward data bits between a radio head and a BBU by using TDM cells which may reduce latency relative to using Ethernet frames.

公开(公告)号：US20180317188A1

公开(公告)日：2018-11-01

申请号：US15582024

申请日：2017-04-28

Applicant: Cisco Technology, Inc.

Inventor： Paul J. STAGER ,  David S. KLOPER ,  Brian D. HART ,  Matthew A. SILVERMAN

IPC: H04W56/00

CPC classification number: H04W56/0015

Abstract: Techniques are disclosed to synchronize wireless signal transmission by endpoints controlled by a central controller. For example, an example method of wireless communication includes receiving, at a first device, over a wired medium between the first device and a second device, a plurality of packets from the second device. Each of the plurality of packets comprises data representative of a portion of a signal corresponding to a wireless medium. The method further includes receiving, at the first device, from the second device over the wired medium a synchronization signal based on a common master clock at the second device. The method further includes synchronizing, at the first device, a local clock of the first device to the common master clock based on the synchronization signal. The method further includes reconstructing the signal corresponding to the wireless medium based on the plurality of packets and the synchronized local clock.