TIME DIVISION DUPLEXED DIGITAL DISTRIBUTED ANTENNA SYSTEM
First Claim
Patent Images
1. A digital distributed antenna system (DDAS), comprising:
- a base station providing transmit and receive time division duplexed (TDD) digital communication signals;
one or more remote radio units; and
one or more TDD fiber optic interface links coupled between the base station and the one or more remote radio units;
wherein the base station provides a time advanced burst for downlink TDD communications with the one or more remote radio units to compensate for fiber transport delay and propagation delay.
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Abstract
A Time Division Duplexed (TDD) digital distributed antenna system (DDAS) that performs simulcast distribution to multiple simulcast groups while using TDD time advanced burst to negate the data rate reducing effects of transport delays. The User Plane data is adapted for eliminating time delay ambiguities across multiple simulcast digital radios. In addition, the Control and Management Plane is aggregated across multiple remote units to allow a non-modified donor digital base station to control simulcast groups.
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Citations
20 Claims
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1. A digital distributed antenna system (DDAS), comprising:
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a base station providing transmit and receive time division duplexed (TDD) digital communication signals; one or more remote radio units; and one or more TDD fiber optic interface links coupled between the base station and the one or more remote radio units; wherein the base station provides a time advanced burst for downlink TDD communications with the one or more remote radio units to compensate for fiber transport delay and propagation delay. - View Dependent Claims (2, 3, 4)
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5. A digital distribution communication network, comprising:
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a base station providing a transmit and receive time division duplexed (TDD) digital communication signal; a plurality of TDD digital distributed radio (DDR) remotes coupled to receive the TDD digital signal from the base station; and a TDD DDR hub configured to provide a 1;
N simulcast of the TDD digital communication signal, the TDD DDR hub coupled to the base station and each of the plurality of TDD DDR remotes, wherein the base station provides a time advanced burst for downlink and uplink TDD communication with the plurality of DDR remotes to compensate for fiber transport delay and propagation delay of the longest delay of the N remotes. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method for providing a time division duplexed (TDD) digital communication signal between a digital base station and a plurality of remote digital distributed radios (DDRs), the method comprising:
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providing and receiving a multiplexed TDD communication signal at a digital base station via a digital distributed interface unit; processing the digital multiplexed TDD communication signal for controlled distribution of a 1;
N simulcast distribution of the digital multiplexed TDD communication signal to and from a plurality of remote DDRs; andproviding a time advanced burst for downlink TDD communications with the plurality of remote radio units to compensate for fiber transport delay and propagation delay, wherein the digital distributed interface unit manages a remote digital interface delay to align a plurality of remote digital multiplexed TDD signals from the plurality of remote DDRs. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification