WO2007108885B1 - Methods and apparatus for overlapping mimo antenna physical sectors - Google Patents
Methods and apparatus for overlapping mimo antenna physical sectorsInfo
- Publication number
- WO2007108885B1 WO2007108885B1 PCT/US2007/004504 US2007004504W WO2007108885B1 WO 2007108885 B1 WO2007108885 B1 WO 2007108885B1 US 2007004504 W US2007004504 W US 2007004504W WO 2007108885 B1 WO2007108885 B1 WO 2007108885B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- individual
- antennas
- antenna
- mimo antenna
- virtual
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
- H04B7/0495—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity using overlapping sectors in the same base station to implement MIMO for antennas
Abstract
Methods and apparatus for positioning antennas of a first wireless cell to form MIMO physical sectors and MIMO virtual sectors. Selecting a MIMO virtual sector for communication responsive to throughput, data throughput, signal-to-noise ratio, signal error rate, data error rate, retransmission requests, interference, rejection of multipath signals, transmission rate, and signal strength.
Claims
AMENDED CLAIMS received by the International Bureau on 10 October 2007 (10.10.2007).
What is claimed is:
33. A method performed by a wireless cell for forming a MIMO antenna from a plurality of individual directional antennas, the MIMO antenna for communicating with a wireless device, the method comprising: selecting individual antennas that form a virtual sector of a plurality of virtual sectors to operate as a selected MIMO antenna; detecting a signal quality using the selected MIMO antenna; repeating selecting and detecting for individual antennas that form a next virtual sector until individual antennas of all virtual sectors of the plurality of virtual sectors are tested as the selected MIMO antenna; and in accordance with detecting, operating the individual antennas of the virtual sector that provides a signal quality greater than a threshold as the MIMO antenna to communicate with the wireless device; wherein: the wireless cell comprises the plurality of individual directional antennas and the plurality of virtual sectors; each one individual antenna comprises a respective physical sector; each one individual antenna of the plurality of individual directional antennas is oriented in a unique direction; the physical sector of each one individual antenna overlaps at least 16 percent of the physical sector of at least one other individual antenna thereby forming the plurality of virtual sectors; no one physical sector of any individual antenna entirely overlaps the physical sector of any other individual antenna; and the individual antennas that operate as the MIMO antenna are assigned the same channel.
34. The method of claim 33 wherein detecting comprises detecting a signal quality for each one channel of a plurality of channels.
35. The method of claim 33 wherein detecting comprises assigning each one of the selected individual antennas of the MIMO antenna a same channel.
36. The method of claim 33 wherein detecting comprises detecting a signal strength.
37. The method of claim 33 wherein detecting comprises detecting a throughput.
38. The method of claim 33 wherein detecting comprises detecting a signal-to- noise ratio.
39. The method of claim 33 wherein selecting comprises using an RF switch to select an individual antenna.
40. The method of claim 33 wherein operating comprises transmitting a same radio signal through at least two individual antennas of the virtual sector.
41. The method of claim 33 wherein operating comprises receiving a same radio signal through at least two individual antennas of the virtual sector.
42. The method of claim 33 further comprising a processor and three radios; wherein: the processor couples to the radios; the plurality of individual directional antennas comprises six individual directional antennas; two individual antennas couple to each one radio respectively; each one physical sector comprises an angle of coverage of about 180 degrees; the unique direction between any two individual antennas differs by a factor of 60 degrees; and the MIMO antenna comprises three individual antennas.
43. The method of claim 33 further comprising a processor and three radios; wherein: the processor couples to the radios; the plurality of individual directional antennas comprises nine individual directional antennas; three individual antennas couple to each one radio respectively; each one physical sector comprises an angle of coverage of about 120 degrees; the unique direction between any two individual antennas differs by a factor of 40 degrees; and the MIMO antenna comprises three antennas.
44. A wireless cell that operates at least two individual antennas selected from a plurality of individual directional antennas as a first MIMO antenna, the first MIMO
antenna communicates with a provided first wireless device, the wireless cell comprising: the plurality of individual directional antennas; at least two radios; a processor that couples to the radios; wherein: at least one individual antenna couples to each one radio; each one individual antenna comprises a respective physical sector; each one individual antenna of the plurality of individual directional antennas is oriented in a unique direction; the physical sector of each one individual antenna overlaps at least 16 percent of the physical sector of at least one other individual antenna thereby forming a virtual sector of a plurality of virtual sectors; no one physical sector of any individual antenna entirely overlaps the physical sector of any other individual antenna; each virtual sector of the plurality of virtual sectors comprises an area of overlap of at least two physical sectors; the wireless cell selects the individual antennas of a first virtual sector of the plurality of virtual sectors in accordance with a signal quality; and the wireless cell operates the individual antennas of the first virtual sector as the first MIMO antenna to communicate with the first wireless device.
45. The wireless cell of claim 44 wherein the individual antennas that operate as the first MIMO antenna communicate using a same channel;
46. The wireless cell of claim 44 further comprising two RF switches, wherein: the plurality of individual directional antennas comprises four individual antennas; each one RF switch couples in series with one radio and two individual antennas respectively; and the processor selects the first virtual sector of the plurality of virtual sectors using the RF switches.
47. The wireless cell of claim 44 wherein: the at least two radios comprises three radios; the plurality of individual directional antennas comprises six individual directional antennas;
two individual antennas couple to each one radio respectively; each one physical sector comprises an angle of coverage of about 180 degrees; the unique direction between any two individual antennas differs by a factor of 60 degrees; and the first MIMO antenna comprises three individual antennas.
48. The wireless cell of claim 44 wherein: the at least two radios comprises three radios; the plurality of individual directional antennas comprises nine individual directional antennas; three individual antennas couple to each one radio respectively; each one physical sector comprises an angle of coverage of about 130 degrees; the unique direction between any two individual antennas differs by a factor of 40 degrees; and the first MIMO antenna comprises three individual antennas.
49. The wireless cell of claim 44 wherein at least two individual antennas of the first MIMO antenna transmits a same radio signal.
50. The wireless cell of claim 44 wherein at least two individual antennas of the first MIMO antenna receive a same radio signal.
51. The wireless cell of claim 44 wherein the wireless cell operates the individual antennas of a second virtual sector as a second MIMO antenna to communicate with a second wireless device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07751274A EP1994650B1 (en) | 2006-02-28 | 2007-02-21 | Methods and apparatus for overlapping mimo antenna physical sectors |
| CA2637182A CA2637182C (en) | 2006-02-28 | 2007-02-21 | Methods and apparatus for overlapping mimo antenna physical sectors |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74337606P | 2006-02-28 | 2006-02-28 | |
| US60/743,376 | 2006-02-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2007108885A2 WO2007108885A2 (en) | 2007-09-27 |
| WO2007108885A3 WO2007108885A3 (en) | 2007-11-08 |
| WO2007108885B1 true WO2007108885B1 (en) | 2007-12-27 |
Family
ID=38325250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2007/004504 WO2007108885A2 (en) | 2006-02-28 | 2007-02-21 | Methods and apparatus for overlapping mimo antenna physical sectors |
Country Status (6)
| Country | Link |
|---|---|
| US (20) | US8009646B2 (en) |
| EP (7) | EP2475106A1 (en) |
| KR (1) | KR20080096803A (en) |
| CN (1) | CN101395820A (en) |
| CA (3) | CA2867303C (en) |
| WO (1) | WO2007108885A2 (en) |
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- 2007-02-21 EP EP12155343A patent/EP2466762A1/en not_active Withdrawn
- 2007-02-21 KR KR1020087021129A patent/KR20080096803A/en not_active Application Discontinuation
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2011
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2012
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