Methods and apparatus for overlapping MIMO physical sectors

• US 8,270,383 B2
• Filed: 08/25/2011
• Issued: 09/18/2012
• Est. Priority Date: 02/28/2006
• Status: Expired due to Fees

• Current Assignee: Woodbury Wireless LLC
• Original Assignee: Rotani, Inc.
• Inventors: Lastinger, Roc, Spenik, John, Woodbury, Brian
• Primary Examiner(s): Ly, Nghi H
• Application Number:
  US13/218,185
• Publication Number:
  US 20110310874A1
• Time in Patent Office: 390 Days
• Field of Search: 370/338, 370/328, 455/422.1, 455/424, 455/443, 455/452.2
• US Class Current: 370/338
• CPC Class Codes: H04B 17/15 Performance testing
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0495 using overlapping sectors in the same base station to implement MIMO for antennas

Abstract

A system for communicating with wireless devices. The systems includes radio groups whose MIMO physical sectors overlap. The MIMO physical sectors communicate using different channels. The MIMO physical sectors overlap to form an area of overlap. Each radio group includes a phased array and radios. Radios are selectively coupled to the phased array. The physical sector of the phase array provides the MIMO physical sector. The phase array operates as a MIMO antenna.

Claims

1. A system for wirelessly communicating with provided wireless devices via a plurality of multiple-input-multiple-output (“

MIMO”

) antennas, the system comprising;

a first radio group comprising a first MIMO physical sector for communicating using a first channel; and

a second radio group comprising a second MIMO physical sector for communicating using a second channel;

wherein;

the first MIMO physical sector overlaps at least 30 percent of an area of the second MIMO physical sector thereby forming an area of overlap;

a frequency of the first channel is different from a frequency of the second channel;

each radio group respectively further comprises;

a phased array; and

at least two radios coupled to the phased array, the radios cooperate with the phase array to form a physical sector for each radio, each physical sector having an angle of coverage less than 360 degrees, the physical sector of each radio at least partially overlaps the physical sector of the other radios of the radio group to form the MIMO physical sector of the radio group, the physical sectors of the phased array operate as a MIMO antenna.

2. The system of claim 1 wherein the first MIMO physical sector substantially overlaps the second MIMO physical sector thereby forming the area of overlap.

3. The system of claim 1 wherein:

the first radio group communicates with a first provided wireless device via the first MIMO physical sector in the area of overlap using the first channel; and

the second radio group communicates with a second provided wireless device via the second MIMO physical sector in the area of overlap using the second channel.

4. The system of claim 1 wherein the first radio group comprises three radios.

5. The system of claim 1 wherein the second radio group comprises three radios.

6. The system of claim 1 wherein the radios of at least one of the first radio group and the second radio group communicate using one of the IEEE 802.11 communication protocols.

7. The system of claim 1 wherein the radios of at least one of the first radio group and the second radio group communicate using the IEEE 802.11n communication protocol.

8. A system for wirelessly communicating with provided wireless devices via a plurality of multiple-input-multiple-output (“

MIMO”

) antennas, the system comprising;

a first radio group comprising a plurality of MIMO physical sectors, each MIMO physical sector for communicating using a first channel; and

a second radio group comprising a plurality of MIMO physical sectors, each MIMO physical sector for communicating using a second channel;

wherein;

each MIMO physical sector of the first radio group overlaps at least 30 percent of an area of at least one MIMO physical sector of the second radio group thereby forming a plurality of areas of overlap;

a frequency of the first channel is different from a frequency of the second channel;

each radio group respectively further comprises;

a phased array; and

at least two radios coupled to the phased array, the radios cooperate with the phase array to form a physical sector for each radio, each physical sector having an angle of coverage less than 360 degrees, two physical sectors at least partially overlap to form each respective MIMO physical sector of the radio group, the overlapping physical sectors of the phased array operate as a respective MIMO antenna.

9. The system of claim 8 wherein each MIMO physical sector of the first radio group substantially overlaps a respective MIMO physical sector of the second radio group thereby forming the plurality of areas of overlap.

10. The system of claim 8 wherein:

the first radio group communicates with a first provided wireless device via one MIMO physical sector of the first radio group using the first channel; and

the second radio group communicates with a second provided wireless device via one MIMO physical sector of the second radio group using the second channel.

11. The system claim 8 wherein the first radio group communicates with a first provided wireless device and the second radio group communicates with a second provided wireless device in a same area of overlap.

12. The system of claim 8 wherein the first radio group comprises three radios.

13. The system of claim 8 wherein the second radio group comprises three radios.

14. The system of claim 8 wherein the radios of at least one of the first radio group and the second radio group communicate using one of the IEEE 802.11 communication protocols.

15. The system of claim 8 wherein the radios of at least one of the first radio group and the second radio group communicate using the IEEE 802.11n communication protocol.