Daisy-chained ring of remote units for a distributed antenna system
First Claim
1. A method for routing and switching signals, the method comprising:
- providing a plurality of digital remote units, each configured to transmit one or more downlink channel signals and to receive one or more uplink channel signals;
providing a digital access unit configured to communicate with at least two of the plurality of digital remote units, wherein the plurality of digital remote units and the 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 digital access unit by a single bi-directional optical fiber and each digital remote unit is accessible in either direction around the ring; and
routing and switching packetized signals among the plurality of digital remote units and the digital access unit, wherein during a first period of time, a first digital remote unit of the plurality of digital remote units receives a first number of downlink channel signals from the digital access unit in a first direction around the ring, and a second digital remote unit of the plurality of digital remote units receives a second number of downlink channel signals from the digital access unit in a second direction around the ring opposite the first direction, where the first number of downlink channel signals is different from the second number of downlink channel signals.
5 Assignments
0 Petitions
Accused Products
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. More specifically, the present invention relates to a DAS utilizing one or more Daisy-Chained Rings of Remote Units. 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.
70 Citations
14 Claims
-
1. A method for routing and switching signals, the method comprising:
-
providing a plurality of digital remote units, each configured to transmit one or more downlink channel signals and to receive one or more uplink channel signals; providing a digital access unit configured to communicate with at least two of the plurality of digital remote units, wherein the plurality of digital remote units and the 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 digital access unit by a single bi-directional optical fiber and each digital remote unit is accessible in either direction around the ring; and routing and switching packetized signals among the plurality of digital remote units and the digital access unit, wherein during a first period of time, a first digital remote unit of the plurality of digital remote units receives a first number of downlink channel signals from the digital access unit in a first direction around the ring, and a second digital remote unit of the plurality of digital remote units receives a second number of downlink channel signals from the digital access unit in a second direction around the ring opposite the first direction, where the first number of downlink channel signals is different from the second number of downlink channel signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for routing and switching signals, comprising:
-
a plurality of digital remote units, each configured to transmit one or more downlink channel signals and to receive one or more uplink channel signals; and a digital access unit configured to communicate with at least two of the plurality of digital remote units, wherein the plurality of digital remote units and the 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 digital access unit by a single bi-directional optical fiber and each digital remote unit is accessible in either direction around the ring; wherein during a first period of time, a first digital remote unit of the plurality of digital remote units is configured to receive a first number of downlink channel signals from the digital access unit in a first direction around the ring, and a second digital remote unit of the plurality of digital remote units is configured to receive a second number of downlink channel signals from the digital access unit in a second direction around the ring opposite the first direction, where the first number of downlink channel signals is different from the second number of downlink channel signals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification