METHOD AND APPARATUS FOR USE WITH A RADIO DISTRIBUTED ANTENNA SYSTEM HAVING AN OUT-OF-BAND REFERENCE SIGNAL

• US 20180269927A1
• Filed: 05/24/2018
• Published: 09/20/2018
• Est. Priority Date: 09/16/2015
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Gerszberg, Irwin, Henry, Paul Shala, Bennett, Robert, Barzegar, Farhad, Barnickel, Donald J, Willis, III, Thomas M.
• Granted Patent: US 10,547,349 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 3/52 Systems for transmission between fixed stations via waveguides

Abstract

Aspects of the subject disclosure may include, for example, receiving, by a network element of a distributed antenna system, a reference signal, a control channel and a first modulated signal at a first carrier frequency, the first modulated signal including first communications data provided by a base station and directed to a mobile communication device. The instructions in the control channel direct the network element of the distributed antenna system to convert the first modulated signal at the first carrier frequency to the first modulated signal in a first spectral segment. The reference signal is received at an in-band frequency relative to the control channel. Other embodiments are disclosed.

Claims

1. A method, comprising:

receiving, by a system including circuitry, a modulated signal in a first spectral segment directed to a mobile communication device, wherein the modulated signal conforms to a signaling protocol;

converting, by the system, the modulated signal in the first spectral segment to the modulated signal at a second spectral segment based on a signal processing of the modulated signal and without modifying the signaling protocol of the modulated signal, wherein the second spectral segment is outside the first spectral segment;

transmitting, by the system, instructions in a control channel to direct a network element of a distributed antenna system to convert the modulated signal in the second spectral segment to the modulated signal in the first spectral segment; and

transmitting, by the system, a reference signal with the modulated signal in the second spectral segment to the network element of the distributed antenna system, the reference signal enabling the network element to reduce a phase error when reconverting the modulated signal in the second spectral segment to the modulated signal in the first spectral segment for wireless distribution of the modulated signal to the mobile communication device in the first spectral segment, wherein the reference signal is transmitted at an in-band frequency relative to the control channel.

2. The method of claim 1, wherein the instructions are transmitted via modulation of the reference signal.

3. The method of claim 1, wherein the instructions are transmitted as digital data via an amplitude modulation of the reference signal.

4. The method of claim 1, wherein the second spectral segment is within a millimeter-wave frequency band.

5. The method of claim 1, wherein the modulated signal is generated by modulating signals in a plurality of frequency channels according to the signaling protocol to generate the modulated signal in the first spectral segment.

6. The method of claim 1, wherein the signaling protocol comprises a Long-Term Evolution (LTE) wireless protocol or a fifth generation cellular communications protocol.

7. The method of claim 1, wherein the converting by the system comprises up-converting the modulated signal in the first spectral segment to the modulated signal in the second spectral segment.

8. The method of claim 7, wherein the converting by the network element comprises down-converting the modulated signal in the second spectral segment to the modulated signal in the first spectral segment.

9. The method of claim 1, wherein the converting by the system comprises down-converting the modulated signal in the first spectral segment to the modulated signal in the second spectral segment.

10. The method of claim 9, wherein the converting by the network element comprises up-converting the modulated signal in the second spectral segment to the modulated signal in the first spectral segment.

11. The method of claim 1, wherein the control channel is transmitted via modulation of the reference signal with the instructions included in the control channel, and wherein the circuitry comprises analog signal processing circuitry that facilitates analog signal processing, wherein the signal processing comprises the analog signal processing, and wherein the analog signal processing does not require either an analog to digital conversion or a digital to analog conversion.

12. A device, comprising:

a base station interface configured to receive from a base station a modulated signal in a first spectral segment for transmission to a mobile communication device, wherein the modulated signal conforms to a signaling protocol; and

a transceiver configured to convert the modulated signal in the first spectral segment to the modulated signal in a second spectral segment based on a signal processing of the modulated signal and without modifying the signaling protocol of the modulated signal, wherein the transceiver is further configured to transmit instructions in a control channel to direct a network element of a distributed antenna system to convert the modulated signal in the second spectral segment to the modulated signal in the first spectral segment and to transmit a reference signal with the modulated signal in the second spectral segment to the network element of the distributed antenna system for wireless distribution of the modulated signal to the mobile communication device in the first spectral segment, the reference signal enabling the network element to reduce a phase error during processing of the modulated signal from the second spectral segment to the first spectral segment, wherein the reference signal is transmitted at an in-band frequency relative to the control channel.

13. The device of claim 12, wherein the instructions are transmitted via modulation of the reference signal.

14. The device of claim 12, wherein the instructions are transmitted as digital data via an amplitude modulation of the reference signal.

15. A method, comprising:

receiving, by a network element of a distributed antenna system, a reference signal, a control channel and a modulated signal in a first spectral segment, the modulated signal including communications data provided by a base station and directed to a mobile communication device, wherein instructions in the control channel direct the network element of the distributed antenna system to convert the modulated signal in the first spectral segment to the modulated signal in a second spectral segment, and wherein the reference signal is received at an in-band frequency relative to the control channel;

converting, by the network element, the modulated signal in the first spectral segment to the modulated signal in the second spectral segment in accordance with the instructions and based on a signal processing of the modulated signal and utilizing the reference signal to reduce distortion during the converting; and

wirelessly transmitting, by the network element, the modulated signal at the second spectral segment to the mobile communication device.

16. The method of claim 15, wherein the instructions of the control channel are received via demodulation of the reference signal.

17. The method of claim 15, wherein the instructions are received as digital data via an amplitude demodulation of the reference signal.

18. The method of claim 15, wherein the modulated signal is formatted in accordance with a Long-Term Evolution (LTE) wireless protocol or a fifth generation cellular communications protocol.

19. The method of claim 15, wherein the converting by the network element comprises up-converting the modulated signal in the first spectral segment to the modulated signal in the second spectral segment.

20. The method of claim 15, wherein the converting by the network element comprises down-converting the modulated signal in the first spectral segment to the modulated signal in the second spectral segment.