Distributed antenna system

Patent metadata

Field	Value
Publication number	US-2016014782-A1
Application number	US-201514800515-A
Country	US
Kind code	A1
Filing date	Jul 15, 2015
Priority date	Dec 26, 2006
Publication date	Jan 14, 2016
Grant date	—

Abstract

The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. The present invention enables a high degree of flexibility to manage, control, enhance, facilitate the usage and performance of a distributed wireless network such as Flexible Simulcast, automatic traffic load-balancing, network and radio resource optimization, network calibration, autonomous/assisted commissioning, carrier pooling, automatic frequency selection, frequency carrier placement, traffic monitoring, traffic tagging, pilot beacon, etc. As a result, a DAS in accordance with the present invention can increase the efficiency and traffic capacity of the operators' wireless network.

First claim

1 . (canceled)

2 . A method of communicating in a distributed antenna system (DAS), the method comprising:
providing a plurality of digital remote units; providing at least one digital access unit configured to communicate with the plurality of digital remote units, the at least one digital access unit configured to receive a plurality of downlink channels from at least one base station and to send the plurality of downlink channels to the plurality of digital remote units; sending a first portion of the plurality of downlink channels from the at least one digital access unit to a first digital remote unit of the plurality of digital remote units; and sending a second portion of the plurality of downlink channels from the at least one digital access unit to a second digital remote unit of the plurality of digital remote units, wherein at least some channels in the first portion of the plurality of downlink channels are different from channels in the second portion of the plurality of downlink channels.

3 . The method of claim 2 wherein the first digital remote unit is configured to transmit the first portion of the plurality of downlink channels received from the at least one digital access unit and to receive a corresponding first portion of uplink channels.

4 . The method of claim 2 wherein the second digital remote unit is configured to transmit the second portion of the plurality of downlink channels received from the at least one digital access unit and to receive a corresponding second portion of uplink channels.

5 . The method of claim 2 wherein the plurality of digital remote units and the at least one digital access unit are daisy-chained in a ring such that each digital remote unit is linked to a next digital remote unit or to the at least one digital access unit by a single by-directional optical fiber and each digital remote unit is accessible by the at least one digital access unit in either direction around the ring.

6 . The method of claim 2 wherein the at least one digital access unit comprises a plurality of digital access units each interconnected with at least one of the plurality of digital access units.

7 . The method of claim 2 wherein a number of the first portion of the plurality of downlink channels is less than a number of the plurality of downlink channels.

8 . The method of claim 2 wherein the plurality of downlink channels comprise a plurality of carriers.

9 . The method of claim 2 wherein the plurality of downlink channels comprise a plurality of frequency bands.

10 . The method of claim 2 wherein at least some channels in the first portion of the plurality of downlink channels are the same as channels in the second portion of the plurality of downlink channels.

11 . A method of communicating in a distributed antenna system (DAS), the method comprising:
providing a plurality of digital remote units; providing a plurality of digital access units, at least one of the plurality of digital access units configured to communicate with the plurality of digital remote units, the at least one of the plurality of digital access units configured to receive a plurality of downlink channels from at least one base station and to send the plurality of downlink channels to the plurality of digital remote units; sending a first portion of the plurality of downlink channels from the at least one of the plurality of digital access units to a first digital remote unit of the plurality of digital remote units; and sending a second portion of the plurality of downlink channels from the at least one of the plurality of digital access units to a second digital remote unit of the plurality of digital remote units, wherein at least some channels in the first portion of the plurality of downlink channels are different from channels in the second portion of the plurality of downlink channels.

12 . The method of claim 11 wherein the first digital remote unit is configured to transmit the first portion of the plurality of downlink channels received from the at least one of the plurality of digital access units and to receive a corresponding first portion of uplink channels.

13 . The method of claim 11 wherein the second digital remote unit is configured to transmit the second portion of the plurality of downlink channels received from the at least one of the plurality of digital access units and to receive a corresponding second portion of uplink channels.

14 . The method of claim 11 wherein the plurality of digital remote units and the at least one of the plurality of digital access units are daisy-chained in a ring such that each digital remote unit is linked to a next digital remote unit or to the at least one of the plurality of digital access units by a single by-directional optical fiber and each digital remote unit is accessible by the at least one of the plurality of digital access units in either direction around the ring.

15 . The method of claim 11 wherein each of the plurality of digital access units are interconnected with at least another one of the plurality of digital access units.

16 . The method of claim 11 wherein a number of the first portion of the plurality of downlink channels is less than a number of the plurality of downlink channels.

17 . The method of claim 11 wherein the plurality of downlink channels comprise a plurality of carriers.

18 . The method of claim 11 wherein the plurality of downlink channels comprise a plurality of frequency bands.

19 . The method of claim 11 wherein at least some channels in the first portion of the plurality of downlink channels are the same as channels in the second portion of the plurality of downlink channels.

Assignees

• Dali Systems Co Ltd

Inventors

• Stapleton Shawn Patrick
• Lemson Paul
• Lin Bin
• Lee Albert S

Classifications

• H03F3/24

  of transmitter output stages · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04B1/0475

  with means for limiting noise, interference or distortion (H04B1/0483 takes precedence) · CPC title

• H04L27/2618

  Reduction thereof using auxiliary subcarriers · CPC title

• H04W88/085

  Access point devices with remote components · CPC title