Daisy-chained ring of remote units for a distributed antenna system
First Claim
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1. A system for routing and switching operator RF signals, the system comprising;
- a first digital access unit configured to receive first RF signals from a first base station at one or more first downlink radio frequencies, convert the first RF signals to first optical signals, and transmit the first optical signals as first downlink optical signals;
a second digital access unit interconnected with the first digital access unit via a bidirectional cable, the second digital access unit configured to receive second RF signals from a second base station at one or more second downlink radio frequencies, convert the second RF signals to second optical signals, and transmit the second optical signals as second downlink optical signals; and
a first plurality of remote radio units interconnected with each other and communicatively coupled to the first digital access unit, each of the first plurality of remote radio units configured to receive the first downlink optical signals from the first digital access unit and to transmit one or more first uplink optical signals to the first digital access unit.
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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.
65 Citations
24 Claims
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1. A system for routing and switching operator RF signals, the system comprising;
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a first digital access unit configured to receive first RF signals from a first base station at one or more first downlink radio frequencies, convert the first RF signals to first optical signals, and transmit the first optical signals as first downlink optical signals; a second digital access unit interconnected with the first digital access unit via a bidirectional cable, the second digital access unit configured to receive second RF signals from a second base station at one or more second downlink radio frequencies, convert the second RF signals to second optical signals, and transmit the second optical signals as second downlink optical signals; and a first plurality of remote radio units interconnected with each other and communicatively coupled to the first digital access unit, each of the first plurality of remote radio units configured to receive the first downlink optical signals from the first digital access unit and to transmit one or more first uplink optical signals to the first digital access unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22, 23, 24)
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11. A system for routing and switching operator RF signals, the system comprising:
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a first digital access unit communicatively coupled to a first base station, the first digital access unit configured to receive first RF signals from a first base station at one or more first downlink radio frequencies, convert the first RF signals to first optical signals, and transmit the first optical signals as first downlink optical signals; a second digital access unit interconnected with the first digital access unit via a first bidirectional cable, the second digital access unit configured to receive second RF signals from a second base station at one or more second downlink radio frequencies, convert the second RF signals to second optical signals, and transmit the second optical signals as second downlink optical signals; a third digital access unit interconnected with the first digital access unit via a second bidirectional cable, the third digital access unit configured to receive third RF signals from a third base station at one or more third downlink radio frequencies, convert the third RF signals to third optical signals, and transmit the third optical signals as third downlink optical signals; and a first plurality of remote radio units communicatively coupled to the third digital access unit, each of the first plurality of remote radio units configured to receive the third downlink optical signals from the third digital access unit and to transmit one or more third uplink optical signals to the third digital access unit. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A system for routing and switching operator RF signals, the system comprising:
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a first digital access unit communicatively coupled to a first base station, the first digital access unit configured to receive first RF signals from a first base station at one or more first downlink radio frequencies, convert the first RF signals to first optical signals, and transmit the first optical signals as first downlink optical signals; a second digital access unit interconnected with the first digital access unit via a first bidirectional cable, the second digital access unit configured to receive second RF signals from a second base station at one or more second downlink radio frequencies, convert the second RF signals to second optical signals, and transmit the second optical signals as second downlink optical signals; a third digital access unit interconnected with the first digital access unit via a second bidirectional cable, the third digital access unit configured to receive third RF signals from a third base station at one or more third downlink radio frequencies, convert the third RF signals to third optical signals, and transmit the third optical signals as third downlink optical signals; at least one remote radio unit communicatively coupled to the third digital access unit, the at least one remote radio unit configured to receive the third downlink optical signals from the third digital access unit and to transmit one or more third uplink optical signals to the third digital access unit. - View Dependent Claims (19, 20)
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Specification
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Current AssigneeDali Wireless Inc. (Dali Systems Co., Ltd.)
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Original AssigneeDali Systems Co., Ltd.
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InventorsStapleton, Shawn Patrick, Lemson, Paul, Trajkovic, Sasa, Lee, Albert S.
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Primary Examiner(s)Zhao, Wei
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Application NumberUS13/913,207Publication NumberTime in Patent Office844 DaysField of Search370/328US Class Current1/1CPC Class CodesH03F 1/3247 using feedback acting on pr...H03F 2200/336 A I/Q, i.e. phase quadratur...H03F 2200/57 Separate feedback of real a...H03F 2201/3224 Predistortion being done fo...H03F 2201/3233 Adaptive predistortion usin...H03F 3/24 of transmitter output stagesH04B 1/0475 with means for limiting noi...H04B 2001/0425 with linearisation using pr...H04B 7/022 Site diversity; Macro-diver...H04L 2025/03414 MulticarrierH04L 25/03343 Arrangements at the transmi...H04L 27/2618 Reduction thereof using aux...H04L 27/362 Modulation using more than ...H04W 24/02 Arrangements for optimising...H04W 24/04 Arrangements for maintainin...H04W 40/00 Communication routing or co...H04W 40/02 Communication route or path...H04W 72/04 Wireless resource allocationH04W 72/0453 Resources in frequency doma...H04W 88/085 Access point devices with r...
