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`US010715235B2
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`(IO) Patent No.:
`US 10,715,235 B2
`
`
`c12) United States Patent
`(45)Date of Patent:
`Jul. 14, 2020
`Da Silva et al.
`
`(54)DIRECTED WIRELESS COMMUNICATION
`
`(58)Field of Classification Search
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`None
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`
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`See application file for complete search history.
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`(71)Applicant: XR Communications, LLC, Solana
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`Beach, CA (US)
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`(56)
`(72)Inventors: Marcus Da Silva, Spokane, WA (US);
`
`
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`
`
`Vahid Tarokh, Cambridge, MA (US);
`
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`Praveen Mehrotra, Spokane, WA (US);
`Walker
`4,231,040 A 10/1980
`
`
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`
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`William J. Crilly, Jr., Liberty Lake,
`
`4,750,147 A 6/1988 Roy, III
`
`et al.
`WA (US); James Brennan,
`(Continued)
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`Sammamish, WA (US); Robert J.
`
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`Conley, Liberty Lake, WA (US);
`
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`Siavash Alamouti, Spokane, WA (US);
`
`EP
`
`Eduardo Casas, Vancouver (CA);
`EP
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`Hujun Yin, Spokane, WA (US); Bobby
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`Jose, Verndale, WA (US); Yang-Seok
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`Choi, Liberty Lake, WA (US)
`
`
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`FOREIGN PATENT DOCUMENTS
`
`
`
`0817517 Al 1/1998
`
`
`1117270 A2 7/2001
`(Continued)
`
`( *) Notice: Subject to any disclaimer, the term ofthis
`
`
`Anastasi, et. al., "MAC Protocols for Wideband Wireless Local
`
`
`
`
`
`
`patent is extended or adjusted under 35
`
`
`
`
`
`Access: Evolution Towards Wireless ATM", IEEE Personal Com
`
`
`U.S.C. 154(b) by O days.
`
`
`munications Magazine, pp. 53-64, Oct. 1998.
`(Continued)
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`(21)Appl. No.: 15/495,539
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`OTHER PUBLICATIONS
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`(22) Filed: Apr. 24, 2017
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`(65)
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`Prior Publication Data
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`
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`US 2017/0230094 Al Aug. 10, 2017
`
`Primary Examiner - Shuwang Liu
`
`
`
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`Assistant Examiner - Gina M McKie
`
`
`LLP
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`(74) Attorney, Agent, or Firm - Klein, O'Neill & Singh,
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`(57)
`
`ABSTRACT
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`Related U.S. Application Data
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`Disclosed herein are methods and apparatuses configured to
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`direct wireless communication. In some embodiments, a
`(60)Continuation of application No. 15/260,147, filed on
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`network apparatus is configu red to: receive a first sign al
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`Sep. 8, 2016, which is a continuation of application
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`transmission from a remote station via a first antenna
`(Continued)
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`element of an antenna and a second signal transmission from
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`the remote station via a second antenna element of the
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`antenna simultaneously; determine first signal information
`(2006.01)
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`for the first transmission; determine second signal informa
`(2017.01)
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`tion for the second transmission, wherein the second sign al
`(Continued)
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`information is different than the first sign al information;
`(52)U.S. Cl.
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`determine a set of weighting values based on the first sign al
`CPC ............. H04B 710617 (2013.01); H04B 7104
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`information and the second signal information, wherein the
`
`(2013.01); H04B 710621 (2013.01);
`
`
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`one or set of weighting values is configu red to construct
`(Continued)
`(Continued)
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`(51)Int. Cl.
`H04B 7106
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`H04B 7104
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`r200
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`212
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`Multi-Beam
`DirectedSJgnal
`System
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`1
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`EXHIBIT 1001
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`US 10,715,235 B2
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`Page 2
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`19 Claims, 18 Drawing Sheets
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`Related U.S. Application Data
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`the 6,311,075 Bl 10/2001 Bevan et al.
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`more beam-formed transmission sign als; and generate
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`6,330,460 Bl 12/2001 Wong et al.
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`
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`one or more beam-formed transmission sign als based on the
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`6,337,659 Bl 1/2002 Kim
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`set of weighting values for transmission to the remote
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`
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`6,345,188 Bl 2/2002 Keskitalo et al.
`station.
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`6,351,499 Bl 2/2002 Paulraj et al.
`
`6,359,923 Bl 3/2002 Agee et al.
`
`
`6,414,986 Bl 7/2002 Usui
`
`
`
`6,438,376 Bl 8/2002 Elliott et al.
`
`
`6,470,195 Bl 10/2002 Meyer
`
`
`6,501,955 Bl 12/2002 Durrant et al.
`
`6,564,036 Bl 5/2003 Kasapi
`
`
`6,597,678 Bl 7/2003 Kuwahara et al.
`
`
`6,611,231 B2 8/2003 Crilly, Jr. et al.
`
`No. 13/855,410, filed on Apr. 2, 2013, now Pat. No. 6,611,695 Bl 8/2003 Periyalwar
`
`
`
`
`
`9,462,589, which is a division of application No. 6,628,235
`
`B2 9/2003 Wight
`
`
`B2 10/2003 Berg et al. 10/700,329, filed on Nov. 3, 2003, now Pat. No. 6,631,277
`
`
`
`6,665,545 Bl 12/2003 Raleigh et al.
`8,412,106.
`
`
`6,667,712 B2 12/2003 Ericson et al.
`
`
`6,687,492 Bl 2/2004 Sugar et al.
`Bl 2/2004 Molnar et al. (60)Provisional application No. 60/423,660, filed on Nov. 6,694,154
`
`6,714,584 Bl * 3/2004 Ishii . H04B 7/086
`
`
`375/144
`
`
`
`
`
`4, 2002.
`
`(56)
`
`
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`
`
`
`
`6,748,216 Bl 6/2004 Lee
`
`(51)Int. Cl.
`
`6,778,988 B2 8/2004 Bengtson
`H04W 16128 (2009.01)
`
`
`6,795,409 Bl 9/2004 Youssefmir et al.
`H04W72/04 (2009.01)
`
`
`6,823,174 Bl 11/2004 Masenten et al.
`
`
`6,850,741 B2 2/2005 Lei et al.
`H04B 171318 (2015.01)
`
`6,853,333 B2 2/2005 Ericson et al.
`(52)U.S. Cl.
`
`
`
`6,907,269 B2 6/2005 Yamaguchi et al.
`CPC .......... H04B 171318 (2015.01);
`
`
`
`
`H04W 16128 6,982,968 Bl 1/2006 Barratt et al.
`
`
`B2 3/2006 Walton et al. (2013.01); H04W 721046 (2013.01) 7,020,110
`
`7,031,266 Bl 4/2006 Patel et al.
`
`
`7,031,336 B2 4/2006 Scherzer et al.
`
`
`7,039,441 Bl 5/2006 Reudink et al.
`
`7,054,662 B2 5/2006 Judson
`
`
`7,062,294 Bl 6/2006 Rogard et al.
`
`
`7,062,296 B2 6/2006 Brennan et al.
`4,965,732 A 10/1990 Roy, III et al.
`
`
`
`
`
`7,133,380 Bl 11/2006 Winters et al.
`
`5,095,531 A 3/1992 Ito
`
`
`7,289,826 Bl 10/2007 Hovers et al.
`
`5,327,143 A 7/1994 Goetz
`
`et al.
`
`7,346,365 Bl 3/2008 Hovers et al.
`
`
`5,345,599 A 9/1994 Paulraj et al.
`
`
`7,492,743 B2 2/2009 Uhlik
`
`
`5,471,647 A 11/1995 Gerlach et al.
`
`
`7,529,305 Bl 5/2009 Tong et al.
`
`
`5,515,378 A 5/1996 Roy, III et al.
`
`
`7,729,728 B2 6/2010 Brennan et al.
`
`
`5,546,090 A 8/1996 Roy, III et al.
`
`8,412,106 B2 4/2013 da Silva et al.
`
`5,548,813 A 8/1996 Charas et al.
`
`9,462,589 B2 10/2016 Da Silva
`
`5,553,074 A 9/1996 Acampora
`
`
`
`2001/0003443 Al 6/2001 Velazquez et al.
`
`5,592,490 A
`
`1/1997 Barratt et al.
`
`
`2001/0033600 Al 10/2001 Yang et al.
`
`5,602,555 A 2/1997 Searle
`
`et al.
`
`2002/0034967 Al 3/2002 Tanigu chi et al.
`5,603,089 A
`2/1997 Searle et al.
`
`
`
`2002/0097700 Al 7/2002 Alastalo et al.
`5,634,199 A
`
`5/1997 Gerlach et al.
`
`2002/0103013 Al 8/2002 Watson et al.
`
`5,642,353 A 6/1997 Roy, III
`
`et al.
`
`7/1997 Reed 2002/0137 538 Al * 9/2002 Chen . H04B 7/0491
`5,649,293 A
`455/575.7
`
`5,687,194 A 11/1997 Paneth et al.
`
`2002/0158801 Al* 10/2002 Crilly, Jr. ................ G0lS 13/74
`
`5,697,066 A 12/1997 Acampora
`
`5,739,788 A 4/1998 Dy
`
`bdal et al.
`342/378
`
`5,771,017 A 6/1998 Dean
`
`et al.
`
`2003/0017853 Al 1/2003 Kanamaluru et al.
`
`
`
`5,809,141 A 9/1998 Dent et al.
`
`
`2003/0064752 Al 4/2003 Adachi et al.
`
`5,809,422 A * 9/1998 Raleigh .
`
`
`
`H04B 7/2609 2003/0073465 Al 4/2003 Li
`
`
`455/444 2003/0114196 Al 6/2003 Chitrapu
`
`2004/0014429 Al 1/2004 Guo
`
`2004/0063468 Al 4/2004 Frank
`
`2004/0066762 Al 4/2004 Alastalo
`2012/0009964 Al* 1/2012 Gormley . 7/0634 H04B
`
`
`
`455/509
`H04B 7/0691
`2013/0094454 Al* 4/2013 Soriaga .
`370/329
`
`
`
`
`
`5,828,658 A 10/1998 Ottersten et al.
`
`
`
`
`5,886,988 A 3/1999 Yun
`
`et al.
`
`5,890,067 A Chang et al. 3/1999
`
`
`5,914,946 A Avidor et al. 6/1999
`
`
`
`
`5,933,421 A Alamouti 8/1999 et al.
`
`
`5,966,094 A 10/1999 Ward et al.
`
`5,987,037 A 11/1999 Gans
`
`6,006,110 A 12/1999 Raleigh
`
`6,049,307 A Lim 4/2000
`
`
`6,067,290 A 5/2000
`
`
`Paulraj et al.
`
`6,091,788 A 7/2000
`
`
`Keskitalo et al.
`
`6,101,399 A 8/2000 Raleigh
`
`et al.
`
`6,104,935 A Smith et al. 8/2000
`
`
`6,108,323 A 8/2000 Gray
`
`
`
`6,115,427 A 9/2000 Calderbank et al.
`
`
`6,141,335 A 10/2000 Kuwahara et al.
`
`
`
`6,169,759 Bl 1/2001 Kanterakis et al.
`
`
`6,169,910 Bl 1/2001 Tamil et al.
`
`
`6,208,858 Bl 3/2001 Antonio et al.
`WO
`6,219,561 Bl 4/2001 Raleigh
`WO
`
`6,233,466 Bl 5/2001 Wong et al.
`
`FOREIGN PATENT DOCUMENTS
`
`2349045 A 10/2000
`
`WO 96/21117 7 /1996
`
`WO 97/00543 Al 1/1997
`
`WO 97/33388 Al 9/1997
`
`WO 98/09381 Al 3/1998
`
`WO 98/18271 A3 4/1998
`9921391 A2 4/1999
`
`WO 99/21391 A2 4/1999
`
`WO 00/38455 Al 6/2000
`
`WO 00/038455 Al 6/2000
`
`GB
`
`WO
`
`WO
`
`WO
`
`WO
`
`WO
`
`WO
`
`WO
`
`2
`
`
`
`US 10,715,235 B2
`
`Page 3
`
`(56)
`
`References Cited
`
`FOREIGN PATENT DOCUMENTS
`
`WO
`WO
`WO
`WO
`WO
`
`11/2000
`
`WO 00/72464 Al
`2/2001
`
`WO 01/010156 Al
`2/2001
`
`WO 01/10156 Al
`8/2002
`
`WO 02/063836 A2
`9/2003
`
`WO 03/075396 A2
`
`Li, Hang et al., "Coded Beamforming for Block Fading Vector
`
`
`Channel", 2001 IEEE, pp. 1137-1141.
`
`
`Dandekar, K.R. et al., "Effect of mutual coupling on direction
`
`
`
`
`
`finding in smart antenna applications", Electronics Letters, vol. 36,
`
`No. 22, Oct. 26, 2000, pp. 1889-1891.
`L. Bigler, H.P. et al., "Experimental Direction of Arrival and Spatial
`
`
`
`
`
`Systems", Sign ature Measurements at 900 MHz for Smart Antenna
`1995 IEEE, pp. 55-58.
`Jeng, Shiann-Shiun et al., "Experimental Evaluation of Smart
`
`
`
`
`
`
`
`Antenna System Performance for Capacity Improvement", 1997
`IEEE, pp. 369-373.
`Jeng, Shiann-Shiun et al., "Experimental Evaluation of Smart
`
`
`
`Berg, J., "Building penetration loss along urban street microcells,"
`
`
`
`
`
`
`
`Antenna System Performance for Wireless Communications", IEEE
`
`
`
`
`in Proceedings of PIMRC '96-7th International Symposium on
`
`
`
`Transactions on Antennas and Propagation, vol. 46, No. 6, Jun.
`
`
`
`
`Personal, Indoor, and Mobile Communications, 3:795-797 (1996).
`1998, pp. 749-757.
`
`
`Damoss, E. and L. Correia, eds., COST 231 Final Report-Digital
`Xu, G. et al., "Experimental Studies of Space-Division-Multiple
`
`
`
`
`Mobile Radio-Towards Future Generation Systems. European
`
`
`
`
`Access Schemes for Spectral Efficient Wireless Communications",
`
`
`
`Commission, Directorate General XIII, Report No. RJR 18957
`1994 IEEE, pp. 800-804.
`
`
`(ISBN 92-828-54167), 516 pages. (1999).
`Jeng, Shiann-Shiun et al., "Experimental Studies of Spatial Signa
`
`
`
`
`Deng, S., "Empirical Model of WWW Document Arrivals at Access
`
`
`
`
`
`
`
`ture Variation at 900 MHz for Smart Antenna Systems", IEEE
`
`
`
`Link," Communications, 1996. ICC '96, Conference Record, Con
`
`
`
`
`Transactions on Antennas and Propagation, vol. 46, No. 7, Jul. 1998,
`
`
`
`verging Technologies for Tomorrow's Applications. 1996 IEEE
`pp. 953-962.
`
`
`
`International Conference, 197-202 ( 1996).
`Fenn, Alan J. et al., "The Development of Phased-Array Radar
`
`
`
`
`
`Gans et al., "High data rate indoor wireless communications using
`
`
`
`
`Technology", Lincoln Laboratory Journal, vol. 12, No. 2, 2000, pp.
`
`
`
`
`
`antenna arrays," in Proceedings of 6th International Symposium on
`321-340.
`
`
`Personal, Indoor and Mobile Radio Communications, 3: 1040-1046
`Foschini, Gerard J., "Layered Space-Time Architecture for Wireless
`
`
`
`
`(1995).
`
`
`Communication in a Fading Environment When Using Multi
`
`
`
`
`Element Antennas", Bell Labs Technical Journal, Autumn 1996, pp.
`
`
`
`German et al., "Wireless Indoor Channel Modeling: Statistical
`41-59.
`
`
`
`
`Agreement of Ray Tracing Simulations and Channel Sounding
`"Part 11: Wireless LAN Medium Access Control (MAC) and
`
`
`
`
`
`
`Measurements," in Proceeding of 2001 IEEE International Confer
`
`
`
`
`
`Physical Layer (PHY) specifications High-speed Physical Layer in
`
`
`
`ence on Acoustics, Speech, and Signal Processing, 4:2501-2504
`
`
`the 5 GHz Band", Supplement to IEEE Standard for Information
`(2001).
`
`
`technology-Telecommunications and information exchange between
`Gucsalla, R., "Characterizing the Variability of Arrival Processes
`
`
`
`
`
`
`
`systems-Local and metropolitan area networks-Specific require
`
`
`
`with Indexes of Dispersion", IEEE JSAC, 9(2):203-211 (1990).
`
`
`
`ments. IEEE Std 802.lla-1999(R2003); Sponsor LAN/MAN Stan
`
`
`
`
`Hashemi, H., "The Indoor Propagation Channel," Proceedings of
`
`
`
`
`dards Committee of the IEEE Computer Society; Reaffirmed Jun.
`
`the IEEE, 81 (7): 943-968 (1993).
`
`
`12, 2003, IEEE-SA Standards Board.
`
`
`
`Jakes, W.C., ed., Microwave Mobile Communications. Wiley, 1974.
`
`Cooper, Martin, et al., "Intelligent Antennas: Spatial Division
`
`
`
`
`645 pages.
`
`
`
`Multiple Access", Annual Review of Communications, 1996, pp.
`Kivinen et al., "Empirical Characterization of Wide hand Indoor
`
`
`
`999-1002.
`
`
`
`radio Channel at 5.3 GHz," IEEE Transactions on Antennas and
`Kaye, A. Roger, et al., "Transmission of Multiplexed PAM Sign als
`
`
`
`
`
`
`ProtJagation, 49(8): 1192-1203 (2001).
`
`
`
`
`Over Multiple Channel and Diversity Systems", IEEE Transactions
`Leland et. Al., "On the Self-Similar Nature of Ethernet Traffic,"
`
`
`
`
`
`on Communication Technology, vol. Com-18, No. 5, Oct. 1970, pp.
`
`
`
`IEEE/ACM Transactions on Networking, 2(1):1-15 (1994).
`520-526.
`
`
`
`
`Medbo, J. and J. Berg, "Simple and accurate path loss modeling at
`VectorKang, Joonhyu k, et al., Low Complexity Array Response
`
`
`
`
`
`
`
`5 GHz in indoor environments with corridors," in Vehicular Tech
`
`
`
`Estimation for Smart Antenna Systems, 2000 IEEE, pp. 841-845.
`
`nology Conference Fall 2000. IEEE V TS Fall V TC2000. 52nd
`
`
`
`Dandekar, Kapil R., et al., "Modeling and Prediction of the Wireless
`
`
`
`
`Vehicular Technology Conference, 1 :30-36 (2000).
`
`
`
`
`
`Vector Channel Encountered by Smart Antenna Systems", Micro
`
`
`
`"Part 11: Wireless LAN Medium Access Control (MAC) and
`
`
`
`wave and Optical Technology Letters, vol. 35, No. 4, Nov. 20, 2002,
`
`
`
`
`Physical Layer (PHY) specifications: Higher-Speed Physical Layer
`pp. 281-283.
`
`
`
`
`Extension in the 2.4 GHz Band", Supplement to IEEE Standard for
`Swales, S.C., et al., "Multi-Beam Adaptive Base-Station Antennas
`
`
`
`
`
`
`for Cellular Land Mobile Radio Systems", 1989 IEEE th Vehicu
`
`
`Information technology-Telecommunications and information
`
`39
`
`
`
`
`exchange between systems-Local and metropolitan area networks
`
`
`
`lar Technology Conference, San Francisco, vol. 1, pp. 341-348.
`
`
`
`Specific requirements. IEEE Std 802.llb-1999(R2003); Sponsor
`
`
`
`
`Balaban, Philip, et al., "Optimum Diversity Combining and Equal
`
`
`
`LAN/MAN Standards Committee of the IEEE Computer Society;
`
`
`
`
`ization in Digital Data Transmission with Applications to Cellular
`
`
`Reaffirmed Jun. 12, 2003, Approved Sep. 16, 1999, IEEE-SA
`
`
`
`Mobile Radio-Part 1: Theoretical Considerations", IEEE Trans
`
`Standards Board.
`
`
`actions on Communications, vol. 40, No. 5, May 1992, pp. 885-894.
`
`
`
`
`Martin Cooper, "A Layman's Guide to Cellular, Annual Review of
`
`
`Naguib, Ayman F., et al., "Performance of CDMA Cellular Net
`
`Communications", 1996, pp. 993-997.
`
`
`
`
`works With Base-Station Antenna Arrays: The Downlink", 1994
`IEEE, pp. 795-799.
`
`
`Anderson et al., "An Adaptive Array for Mobile Communication
`
`
`
`
`Systems", IEEE Transactions on Vehicular Technology, vol. 40, No.
`
`
`
`
`1, Feb. 1991, pp. 230-236.
`
`Array", 1987 IEEE, pp. 1597-1600.
`G. J. Foschini et al., "BLAST: Bell Labs Layered Space-Time, An
`
`
`
`
`Reudink, D.O., et al., "A Scanning Spot-Beam Satellite System",
`
`
`
`
`
`
`Architecture for Realizing Very High Data Rates Over Fading
`
`
`The Bell System Technical Journal, vol. 56, No. 8, Oct. 1997, pp.
`
`
`
`Wireless Channels", https://web.archive/ org/web/ 1999022107 4508/
`1549-1560.
`
`
`
`https://www.bell-labs.com/pr, Lucent Technologies, 1998, 3 pages.
`
`
`
`
`
`
`
`Brandenburg, L. H. et al., "Capacity of the Gaussian Channel With
`
`
`munications Int'!, Apr. 1995, pp. 1-10.
`
`Memory: The Multivariate Case", The Bell System Technical
`
`
`
`
`
`
`
`
`Journal, vol. 63, No. 5, May-Jun. 1974, pp. 745-764.
`
`munications", 1998 IEEE, pp. 631-634.
`
`
`
`Dean Chapman, "First-Hand: Sidelobe Cancellers and the Like",
`Paulraj, Arogyaswami J., et al., "Space-Time Processing for Wire
`
`
`
`
`
`
`
`http:ethw.org/First-Hand: Sidelobe _ Cancellers_and_the_Like, Apr. 12,
`
`
`less Communications", IEEE Signal Processing Magazine, Nov.
`1997, pp. 49-83.
`2017, 4 pages.
`
`OTHER PUBLICATIONS
`
`Cadzow, J.A., et al., "Resolution of Coherent Signals Using a Linear
`
`Nowicki, David, et al., "Smart Antenna Strategies", Mobile Com
`
`Xu, Guanghan, et al., "Smart Antenna Systems for Wireless Com
`
`3
`
`
`
`US 10,715,235 B2
`
`Page 4
`
`(56)
`
`References Cited
`
`OTHER PUBLICATIONS
`
`Supplement to IEEE Standard for Information technology
`
`
`
`
`
`
`
`Telecommunications and information exchange between systems
`
`
`
`Local and metropolitan area networks-Specific requirements, "Part
`
`
`11: Wireless LAN Medium Access Control (MAC) and Physical
`
`
`
`Winters, Jack H., et al., "The Impact of Antenna Diversity on the
`
`
`
`
`Layer (PHY) specifications: Higher-Speed Physical Layer Exten
`
`
`
`
`Capacity of Wireless Communication Systems", IEEE Transactions
`sion in the 2.4 GHz Band", IEEE Std 802.llb-1999 (R2003),
`
`
`on Communications, vol. 42, No. 2/3/4, Feb./Mar./Apr. 1994, pp.
`
`
`
`
`
`Institute of Electrical Engineers, Inc., Jan. 20, 2000, U.S.A., 96
`1740-1751.
`pages.
`Goldburg, Mark, et al., "The Impacts of SDMA on PCS System
`
`
`Krishnamurthy, S.et al., "Polling Based Media Access Protocols for
`
`
`
`
`
`
`
`Design", IEEE, 1994, Session 1.10, ArrayComm, Inc., Santa Clara,
`
`
`
`Use With Smart Adaptive Array Antennas", Conference Record,
`CA, pp. 242-246.
`
`
`
`International Conference on Universal Personal Communications,
`Li, Hang, et al., "Transmission Optimization Over Flat Rayleigh
`
`
`
`Florence, Oct. 1998.
`
`
`Fading Channel with Multiple Antennas", 1999 IEEE, pp. 210-214.
`Krishnamurthy, S.V. et al.; "Polling-Based Media Access Protocols
`
`
`
`
`
`
`
`Van Etten W., "Maximum Likelihood Receiver for Multiple Chan
`
`
`
`
`for Use with Smart Adaptive Array Antennas," IEEE/ACM Trans.
`
`
`
`nel Transmission Systems", IEEE Transactions on Communica
`
`
`Networking vol. 9, No. 2, Apr. 2001.
`
`tions, Feb. 1976, pp. 276-283.
`
`
`
`
`Kavak, Adnan, et al., "Vector Channels for Smart Antennas
`
`
`173.(Japanese)
`
`
`
`
`
`Measurements, Statistical Modeling, and Directional Properties in
`Wolniansky, P. W. et al., "V-Blast: An Architecture for Realizing
`
`
`
`
`
`
`Outdoor Environments", IEEE Transactions on Microwave Theory
`
`
`Very High Data Rates Over the Rich-Scattering Wireless Channel,"
`
`and Techniques, vol. 48, No. 6, Jun. 2000, pp. 930-937.
`
`Proc. URSI ISSSE: 295-300, Sep. 1998.
`
`
`
`
`
`
`Related Virtual Exhibits, Smart Antenna Systems Tutorial, IEC
`Winters, J.H. "Optimum Combining in Digital Mobile Radio with
`
`
`
`
`
`ComForum at WCA 2001: Jun. 25-27, 2001, World Trade Center,
`
`
`
`Cochannel Interference", IEEE Journal on Selected Areas in Com
`
`Boston, MA, USA.
`
`munications, vol. SAC-2, No. 4, Jul. 1984.
`
`
`
`
`Raleigh, G.G., et al., "Adaptive Antenna Transmission for Fre
`Zhang, Z. et al., "Performance of a Modified Polling Strategy for
`
`
`
`
`
`
`
`
`
`quency Duplex Digital Wireless Communication", 1997 IEEE, pp.
`
`
`
`Broadband Wireless LANs in a Harsh Fading Environment," IEEE
`
`
`
`GLobecom '91 Conference Record, Dec. 1991, Phoenix.
`641-646.
`
`
`Acampora, A.S. et al., "Media Access Protocols for Use with Smart
`
`
`
`
`
`
`Gerlach, Derek, "Adaptive Transmitting Antenna Arrays at the Base
`
`
`
`
`Adaptive Array Antennas to Enable Wireless Multimedia Applica
`
`
`Station in Mobile Radio Networks", Aug. 1995, UMI Company,
`
`
`tions", 9th Tyrrehenian Workshop on Digital Communications,
`Ann Arbor, MI, 108 pages.
`
`
`Lerici (Italy), Sep. 1997.
`
`
`
`
`Gerlach, Derek et al., "Adaptive Transmitting Antenna Arrays with
`Zhang, Z. et al., "Performance of a Modified Polling Strategy for
`
`
`
`
`
`
`
`1, No. 10, Oct.Feedback", IEEE Sign al Processing Letters, vol.
`
`
`Broadband Wireless Access in a Harsh Fading Environment,"
`1994, pp. 150-152.
`
`
`Telecommunication Systems, vol. 1, No. 3, 1993, p. 279-294.
`
`
`Lehne, Per H., et al. "An Overview of Smart Antenna Technology
`
`
`XR Communications, LLC, dba Vivato Technologies v. D -Link
`
`
`
`for Mobile Communications Systems", IEEE Communications Sur
`
`
`
`Systems, Inc., et al., Case No. 8:17-cv-0596-AG(JCGx), Defen
`
`
`
`
`veys, http://www.comsoc.org/pubs/surveys, Fourth Quarter 1999,
`
`
`
`
`
`
`dants' Invalidity Contentions Pursuant to Standing Patent Rules 2.5
`vol. 2, No. 4, pp. 2-13.
`
`and 2.6, dated Nov. 10, 2017, 85 pages.
`Gerlach, Derek et al., "Base station transmitting antenna arrays for
`
`
`
`
`
`D. Gerlach and A. Paulraj, "Base Station Transmitter Arrays with
`
`
`
`
`
`
`
`
`pp. 59-73.multipath environments", Si54 (1996) gn al Processing
`
`
`
`Mobile to Base Feedback," Conference Record of the Twenty
`
`
`
`Naguib, Ayman F., et al. "Capacity Improvement of Base-Station
`
`
`
`
`
`Seventh Asilomar Conference on Signals, Systems& Computers,
`
`
`Antenna Arrays Cellular CDMA", 1993 IEEE, pp. 1437-1441.
`1993, pp. 1432-1436.
`
`
`
`Liang et al; "Forward link antenna diversity using feedback for
`I.A. Glover and P.M. Grant, Digital Communications, Prentice Hall
`
`
`
`
`
`
`
`
`
`indoor communication systems", IEEE, 1995 International Confer
`
`
`
`Europe, 1998, pp. 80-86, § 2.6, "Correlation functions".
`
`
`
`
`ence on Acoustics, Speech, and Signal Processing, vol. 3, pp.
`
`
`
`ANSI/IEEE Standard 802.11: Wireless LAN Medium Access Con
`1753-1755.
`
`trol (MAC) and Physical Layer (PHY) Specifications, 1999 Edition.
`
`
`
`
`Paulraj, Arogyaswami; "Smart antennas for battlefield multimedia
`
`
`Z.C. Fluhr and P.T. Porter, "Advanced Mobile Phone Service:
`
`
`
`wireless networks with dual use applications", Army Research
`
`
`
`
`Control Architecture," Bell System Technical Journal, vol. 58, No.
`
`Office, Grant No. DAAH04-95-l-0249, Aug. 15, 1998, 1-22.
`1, Jan. 1979, pp. 43-69 ("Fluhr").
`
`
`
`Anthony S. Acampora et al., "A New Adaptive MAC Layer Protocol
`
`
`
`Hillebrand, ed., "GSM and UMTS: T he Creation of Global Mobile
`
`
`
`
`for Broadband Packet Wireless Networks in Harsh Fading and
`
`
`
`Communication,"John Wiley & Sons, Ltd., 2002, pp. 316-317
`
`
`
`Interference Environments", IEEE/ ACM Transactions on Network
`("Hillebrand").
`
`ing, vol. 8, No. 3, Jun. 2000, pp. 328-336.
`Andrew T. Campbell, et al., "Design, Implementation, and Evalu
`
`
`
`
`
`
`Anthony S. Acampora et al., "A New Adaptive MAC Layer Protocol
`
`
`
`ation of Cellular IP," IEEE Personal Communications (Aug. 2000).
`
`
`
`for Wireless ATM Networks in Harsh Fading and Interference
`
`
`
`Donghee Shim, et al., "Should the Smart Antenna Be a Tracking
`
`
`
`Environments", IEEE, 1997, Center for Wireless Communications,
`
`Beam Array or Switching Beam Array?," th IEEE Vehicular
`
`
`
`University of California, San Diego, pp. 410-415.
`48
`
`Technology Conference (VTC'98) (May 21, 1998).
`
`
`
`
`Anthony S. Acampora et al., "A Wireless Network for Wide-Band
`
`
`
`
`Sandra Kay Miller, "Facing the Challenge of Wireless Security,"
`
`
`
`
`Indoor Communications", IEEE Journal on Selected Areas in Com
`
`
`Computer, pp. 16-18 (Jul. 2001).
`
`munications, vol. SAC-5, No. 5, Jun. 1987, pp. 796-805.
`IEEE 802.11-1997.
`
`
`
`
`A. S. Acampora et al., "System Applications for Wireless Indoor
`Jack H. Winters, "Smart Antennas," Chapter 6 of WTEC Panel
`
`
`
`
`
`Communications", IEEE Communications Magazine, Aug. 1987,
`
`Report on Wireless Technologies and Information Networks (Jul.
`vol. 25, No. 8, pp. 11-20.
`2000).
`
`
`
`
`G.J. Foschini et al., "On Limits of Wireless Communications in a
`Constantine Balanis, Antenna T heory (1997) (selected pages).
`
`
`
`
`
`
`
`Fading Environment When Using Multiple Antennas", Wireless
`
`
`
`S.C. Swales, et al., "The Performance Enhancement of Multibeam
`
`
`
`
`Personal Communications 6, Kluwer Academic Publishers, 1998,
`
`
`
`
`Adaptive Base-Station Antennas for Cellular Land Mobile Radio
`
`Netherlands, pp. 311-335.
`
`
`
`
`Systems," IEEE Transactions on Vehicular Technology, vol. 39, No.
`
`
`
`Supplement to IEEE Standard for Information technology
`1 (Feb. 1990).
`
`
`
`
`Telecommunications and information exchange between systems
`
`
`
`
`
`Local and metropolitan area networks-Specific requirements, "Part
`
`(1996) (selected pages).
`
`
`11: Wireless LAN Medium Access Control (MAC) and Physical
`
`
`
`
`
`Layer (PHY) specifications, High-speed Physical Layer in the 5
`
`
`nications (1999) (selected pages).
`
`
`GHz Band", IEEE-SA Standards Board, Jun. 12, 2003, IEEE Std
`
`
`IEEE Standards Bearer (Oct. 1997).
`
`802.lla-1999(R2003), 91 pages.
`
`
`
`Interface, Feb. 1999, pp. 176-181; Interface, Mar. 1999, pp. 168-
`
`John Litva, et al., Digital Beamforming in Wireless Networks
`
`
`
`Joseph C. Liberti, Jr., et al., Smart Antennas for Wireless Commu
`
`4
`
`
`
`US 10,715,235 B2
`
`Page 5
`
`(56)
`
`References Cited
`
`OTHER PUBLICATIONS
`
`
`
`Oliver C. Ibe, Essentials of ATM Networks and Services, Addison
`
`
`
`
`Wesley (1997).
`
`
`tice Hall ( 1996).
`Bellafiore et al., "Smart antenna system analysis, integration and
`
`
`
`
`
`
`
`performance for mobile ad-hoc networks (MANETs), " in IEEE
`
`
`
`Transactions on Antennas and Propagation, vol. 50, No. 5, pp.
`
`
`571-581, May 2002 (Year: 2002).
`Lal et al., "A novel MAC layer protocol for space division multiple
`
`
`
`
`
`
`
`access in wireless ad hoc networks, " Proceedings. Eleventh Inter
`
`
`
`
`national Conference on Computer Communications and Networks,
`
`
`Miami, FL, USA, 2002, pp. 614-619 (Year: 2002).
`
`
`
`
`
`Andrew S. Tanenbaum, Computer Networks, Third Edition, Pren
`
`
`
`* cited by examiner
`
`5
`
`
`
`
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`U.S. Patent Jul. 14,
`2020 Sheet 9 of 18
`
`US 10,715,235 B2
`
`Constructive Receive
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`U.S. Patent Jul. 14,
`2020 Sheet 10 of 18
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`US 10,715,235 B2
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`U.S. Patent Jul. 14, 2020
`Sheet 11 of 18
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`US 10,715,235 B2
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`18 US 10,715,235 B2
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`U.S. Patent Jul. 14,
`
`2020 Sheet 13 of 18 US 10,715,235 B2
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`
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`Multi-Beam Directed Signal System 206
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`U.S. Patent
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`
`
`Jul. 14, 2020 Sheet 14 of 18
`
`US 10,715,235 B2
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`
`U.S. Patent Jul. 14,
`2020 Sheet 15 of 18
`
`US 10,715,235 B2
`
`Start
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`20
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`
`U.S. Patent Jul. 14,
`2020 Sheet 16 of 18
`
`
`
`US 10,715,235 B2
`
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