CENTRAL NODE APPARATUS AND METHOD FOR TRANSMITTING WIRELESS SIGNALS BETWEEN CENTRAL OFFICE NODE AND REMOTE NODE USING BEAM PATTERNS AND ANTENNA POLARIZATION

• US 20140106807A1
• Filed: 10/14/2013
• Published: 04/17/2014
• Est. Priority Date: 10/15/2012
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: BANG, Young-Jo, PARK, Youn-Ok
• Granted Patent: US 9,276,314 B2
• Time in Patent Office: Days
• US Class Current: 455/517
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161
• CPC Class Codes: H01Q 3/34 by electrical means active lenses or reflecting arrays H01Q3/46
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0682 using phase diversity (e.g. phase sweeping)
• CPC Class Codes: H04B 7/0885 with combination
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A central office node using beam patterns and antenna polarizations, a remote node, and a wireless communication method between the nodes. The central office node includes: a first antenna array with first polarization attributes; a second antenna array with second polarization attributes; and a transmitter unit configured to transmit data to a plurality of remote nodes using beam patterns generated during beamforming and the polarization of the first and second antenna arrays.

Claims

1. A central office node comprising:

a first antenna array with first polarization attributes;

a second antenna array with second polarization attributes; and

a transmitter unit configured to transmit data to a plurality of remote nodes using beam patterns generated during beamforming and the polarizations of the first and second antenna arrays.

2. The central office node of claim 1, wherein one of the first antenna array and the second antenna array has vertical polarization, and the other has horizontal polarization.

3. The central office node of claim 1, wherein if an angle between beam patterns to be transmitted is greater than a predefined reference angle, the transmitter unit transmits data using beam patterns through a plurality of antennas, and if the angle between beam patterns is smaller than the reference angle, the transmitter unit transmits data using, at least once, each of the first antenna array and the second antenna array, which have different polarizations from each other.

4. The central office node of claim 1, wherein an angle between the beam patterns is calculated based on a distance between a transmitter antenna and a receiver antenna and a distance between remote nodes.

5. The central office node of claim 1, wherein:

the transmitter unit is configured to comprise;

a data distribution unit configured to divide entire data into pieces of data to be transmitted to the respective remote nodes,

a data modulation unit configured to modulate the divided pieces of data,

a first transmission beamforming unit configured to form a first beam pattern by allocating the modulated data to the first antenna array, and

a second transmission beamforming unit configured to form a second beam pattern by allocating the modulated data to the second antenna array.

6. The central office node of claim 1, further comprising:

a receiver unit configured to receive data through each of the first and second antenna arrays.

7. The central office node of claim 6, wherein the receiver unit is configured to comprise a first reception beamforming unit configured to receive data through the first antenna array by forming a first beam pattern, a second reception beamforming unit configured to receive data through the second antenna array by forming a second beam pattern, a data demodulation unit configured to demodulate each data received through the first reception beamforming unit and the second reception beamforming unit, and a data combining unit configured to combine data demodulated by the data demodulation unit.

8. The central office node of claim 1 being an apparatus that connects a core network and a plurality of base stations by communicating with the plurality of base stations in a wireless backhaul network.

9. A remote node comprising:

a single-polarized antenna array with single-polarized wave characteristics;

a transceiver unit configured to receive data through the single-polarized antenna array wherein the data is transmitted from a central office node using a beam pattern and polarizations of an antenna array, and to transmit data to the central office node through the single-polarized antenna array; and

a polarization angle control unit configured to control a polarization angle of the single-polarized antenna array.

10. The remote node of claim 9, wherein the polarization angle control unit is configured to switch according to the polarizations of the antenna array of the central office node.

11. The remote node of claim 9 being a base station that is connected to a core network via the central office node in a wireless backhaul network.

12. A wireless communication method of a central office node to communicate with a plurality of remote nodes, the wireless communication method comprising:

being provided with a first antenna array and a second antenna array, which have different polarization characteristics from each other; and

transmitting data using beam patterns generated during beamforming and polarization of each of the antennae arrays.

13. The wireless communication method of claim 12, wherein one of the first antenna array and the second antenna array has vertical polarization and the other has horizontal polarization.

14. The wireless communication method of claim 12, wherein:

the transmission of the data comprises;

if an angle between beam patterns to be transmitted is greater than a predefined reference angle, transmitting data using beam patterns through a plurality of antennas, and

if the angle between beam patterns is smaller than the reference angle, transmitting data using, at least once, each of the first antenna array and the second antenna array, which have different polarizations from each other.

15. The wireless communication method of claim 12, wherein an angle between the beam patterns is calculated based on a distance between a transmitter antenna and a receiver antenna and a distance between remote nodes.

16. The wireless communication method of claim 12, wherein:

the transmission of the data comprises;

dividing entire data into pieces of data to be transmitted to the respective remote nodes,

modulating the divided pieces of data, and

forming beam patterns by allocating the modulated data to the respective first and second antenna arrays, which have different polarizations.

17. The wireless communication method of claim 12, further comprising:

receiving data through each of the first and second antenna arrays.

18. The wireless communication method of claim 17, wherein the receiving of the data comprises receiving data through the first antenna array by forming a first beam pattern, receiving data through the second antenna array by forming a second beam pattern, demodulating each of the received data;

and combining the demodulated data

19. The wireless communication method of claim 12, wherein the central office node and the plurality of remote nodes transmit and receive data therebetween in a wireless backhaul network.