US 2019/0173691 A1Published application

Forwarding data between an array of baseband units and an array of radio heads in a distributed wireless system using tdm switches

AssigneeCisco Technology, Inc.

InventorsDavid S. KLOPER, Brian D. HART, Dipankar B. ACHARYA

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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.

Claims20

Dependent claims

A system, comprising:

a plurality of radio heads, wherein each of the plurality of radio heads comprises at least one antenna and at least one transceiver;
a plurality of controllers disposed in one or more chassis external to the plurality of radio heads, wherein each of the plurality of controllers comprises:
a baseband unit (BBU);
an uplink time-division multiplexing (TDM) switch coupled to (i) at least a first radio head of the plurality of radio heads, (ii) the BBU in the controller, and (iii) at least one uplink TDM switch in a different controller of the plurality of controllers, and wherein the uplink TDM switch is configured to:
receive a first TDM cell based on signals received from the first radio head, wherein the first TDM cell comprises a first plurality of TDM data slots, and wherein a destination of each of the first plurality of TDM data slots is predetermined;
generate a second TDM cell based on the first TDM cell, wherein the second TDM cell comprises a second plurality of TDM data slots, and wherein a destination of each of the second plurality of TDM data slots is predetermined;
forward data bits in a first slot of the first plurality of TDM data slots to the BBU in the controller;
and
forward data bits in a second slot of the first plurality of TDM data slots in the second TDM cell to the at least one uplink TDM switch in the different controller.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/262,444Filed 30 Jan 2019
Priority: 26 Jul 2017
Published: 6 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 12/64
Data switching networks: hybrid switching systems
H04L 12/46
Characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]: interconnection of networks
H04W 16/02
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures: resource…
H04W 88/085
Access point devices: access point devices with remote components

Family

Application15/660,905Continuation · filed 26 Jul 2017
Application16/262,444Continuation
US 10,218,539 B2Related patent
US 10,938,600 B2Related patent
US 2019/0036737 A1Published application
US 2019/0173691 A1This patent

From the US filing history. Foreign family members aren’t listed.

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