System and method for dual-band backhaul radio

• US 9,949,147 B2
• Filed: 08/24/2016
• Issued: 04/17/2018
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: Mimosa Networks, Inc. (Airspan Networks Inc.)
• Original Assignee: Mimosa Networks, Inc. (Airspan Networks Inc.)
• Inventors: Hinman, Brian L., Fink, Jaime, Rangwala, Mustafa
• Primary Examiner(s): Baig, Adnan
• Application Number:
  US15/246,094
• Publication Number:
  US 20160366601A1
• Time in Patent Office: 601 Days
• Field of Search: None
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/20 for optimising the interference level
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method and system are provided. The system includes a communication system including a first transmitter/receiver operating on a first frequency and a second transmitter/receiver operating on a second frequency. The system also includes a controller monitoring at least one of interference and throughput on the first and second transmitter/receiver and shifting demand based on the monitoring.

Claims

1. A method for multiple input multiple output (MIMO) multi-frequency transmission of data by a MIMO radio comprising a first and second set of antennas, wherein the first and second set of antennas each comprise a vertically polarized antenna and a horizontally polarized antenna, the method comprising:

transmitting or receiving data on the first set of antennas using a first frequency;

transmitting or receiving the data on the second set of antennas using a second frequency;

providing isolation between each of the first frequency and the second frequency to avoid intermodulation distortion; and

wherein the first frequency is a single channel in a 5 Ghz band and the second frequency is another channel in the same 5 Ghz band, wherein the channels share the first and second set of antennas such that a single antenna on each polarization is utilized, for a total of two antennas.

2. The method according to claim 1, wherein the first frequency is 5 Ghz and the second frequency is 24 Ghz.

3. The method according to claim 1, further comprising transmitting additional data on either the first or second set of antennas, the additional data being different from the data.

4. The method according to claim 1, further comprising executing instructions stored in non-transitory memory of the MIMO radio, wherein execution of the instructions causes the MIMO radio to perform operations comprising broadcasting an augmented SSID to other collocated MIMO radios, wherein the augmented SSID includes a unique device identifier and any of a broadcast operation mode and a security type used by the MIMO radio.

5. A multiple input multiple output (MIMO) radio, comprising:

a processor;

a non-transitory memory for storing multi-frequency transmission logic;

two 2×

2 radio frequency (RF) converters each tuned to a unique channel in a 5 GHz band;

a first set of antennas comprising a first vertically polarized antenna and a first horizontally polarized antenna;

a second set of antennas comprising a second vertically polarized antenna and a second horizontally polarized antenna; and

wherein the processor executes the multi-frequency transmission logic to cause the first set of antennas to transmit or receive data using one of the unique channels, and the second set of antennas to transmit or receive the data using another of the unique channels, as well as measure upload bandwidth use and download bandwidth use of the MIMO radio and selectively adjust any of an available upload bandwidth or an available download bandwidth of the MIMO radio in response to the upload bandwidth use and the download bandwidth use.

6. The MIMO radio according to claim 5, further comprising a concentric waveguide having an inner waveguide and an outer waveguide, wherein the first set of antennas are disposed within the outer waveguide and the second set of antennas are disposed within the inner waveguide.

7. The MIMO radio according to claim 5, wherein the first vertically polarized antenna and the first horizontally polarized antenna of the first set of antennas are positioned on opposing sides of an inner waveguide.

8. The MIMO radio according to claim 5, wherein the second vertically polarized antenna and the second horizontally polarized antenna of the second set of antennas are positioned on opposing sides of an outer waveguide.

9. The MIMO radio according to claim 5, wherein the first vertically polarized antenna and the first horizontally polarized antenna of the first set of antennas are spaced apart from one another to create spatial diversity and the second vertically polarized antenna and the second horizontally polarized antenna of the second set of antennas are spaced apart from one another to create spatial diversity, wherein the spatial diversity of the first and second sets of antennas enhance signal orthogonality.

10. The MIMO radio according to claim 5, wherein either the first or second set of antennas are configured to transmit additional data, the additional data being different from the data.

11. The MIMO radio according to claim 5, wherein the processor further executes the multi-frequency transmission logic to perform a configuration cycle that includes executing a site survey to determine if the MIMO radio is to operate as a transmitter or a receiver.

12. A wireless network, comprising:

a radio frequency (RF) front-end that shares a low noise amplifier for each unique channel utilized by a plurality of MIMO radios in orthogonal polarization, each comprising;

a processor;

a non-transitory memory for storing multi-frequency transmission logic wherein the processor executes the multi-frequency transmission logic to broadcast an augmented SSID to other collocated MIMO radios, wherein the augmented SSID includes a unique device identifier and any of a broadcast operation mode and a security type used by an MIMO radio, wherein the augmented SSID further comprises any of a broadcast or receive schedule, channel information, and shared channel information that is utilized by the MIMO radio as well as the other collocated MIMO radios;

a first set of antennas comprising a first vertically polarized antenna and a first horizontally polarized antenna, the first set of antennas being configured to transmit or receive data using a first frequency;

a second set of antennas comprising a second vertically polarized antenna and a second horizontally polarized antenna, the second set of antennas being configured to transmit or receive data using a second frequency which is different from the first frequency; and

wherein a first portion of the MIMO radios are configured to transmit data using their first and second sets of antennas, while a second portion of the MIMO radios are configured to receive data from the first portion of the MIMO radios using their first and second sets of antennas.

13. A dual-channel 5 GHz system, comprising:

two antennas in orthogonal polarization;

a 4×

4 baseband processor;

two 2×

2 radio frequency (RF) converters each tuned to a unique channel in a 5 GHz band;

an RF front-end that shares a low noise amplifier for each of the unique channels; and

power amplifiers that provide isolation between each of the unique channels to avoid intermodulation distortion.

14. The system according to claim 13, further comprising a hybrid coupler associated with outputs of the power amplifiers.

15. The system according to claim 14, further comprising a transmit-receive switch communicatively coupled with the hybrid coupler.

16. The system according to claim 13, wherein two polarizations are on a first of the unique channels and another two polarizations are on a second of the unique channels.

17. The system according to claim 13, further comprising a quadrature amplitude modulation decoder that separates four streams created by the dual-channel 5 GHz system.

18. A method for multiple input multiple output (MIMO) multi-frequency transmission of data by a MIMO radio comprising a first and second set of antennas, wherein the first and second set of antennas each comprise a vertically polarized antenna and a horizontally polarized antenna, the method comprising:

transmitting or receiving data on the first set of antennas using a first frequency;

transmitting or receiving the data on the second set of antennas using a second frequency;

providing isolation between each of the first frequency and the second frequency to avoid intermodulation distortion; and

wherein if multiple channels are used within a same band, an RF front-end performance per polarization is optimized using a shared low-noise amplifier between channels to create a best noise figure, and distinct power amplifiers between channels, combined at an output, for best distortion performance.

19. A method for multiple input multiple output (MIMO) multi-frequency transmission of data by a MIMO radio comprising a first and second set of antennas, wherein the first and second set of antennas each comprise a vertically polarized antenna and a horizontally polarized antenna, the method comprising:

transmitting or receiving data on the first set of antennas using a first frequency;

transmitting or receiving the data on the second set of antennas using a second frequency;

providing isolation between each of the first frequency and the second frequency to avoid intermodulation distortion;

measuring upload bandwidth use and download bandwidth use of the MIMO radio; and

selectively adjusting any of an available upload bandwidth or an available download bandwidth of the MIMO radio in response to the upload bandwidth use and the download bandwidth use.

20. The method according to claim 19, further comprising broadcasting an augmented SSID, the augmented SSID comprising any of a broadcast or receive schedule, channel information, and shared channel information that is utilized by the MIMO radio as well as other collocated MIMO radios.

21. A method for multiple input multiple output (MIMO) multi-frequency transmission of data by a MIMO radio comprising a first and second set of antennas, wherein the first and second set of antennas each comprise a vertically polarized antenna and a horizontally polarized antenna, the first and second set of antennas being in orthogonal polarization, the method comprising:

executing a configuration cycle that comprises performing a site survey to determine if the MIMO radio is to operate as a transmitter or a receiver;

transmitting or receiving data on the first set of antennas using a first frequency; and

transmitting or receiving the data on the second set of antennas using a second frequency.