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`UT TIL EN ANAL ATUA
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`US010080178B2
`
`( 12 ) United States Patent
`Stapleton et al .
`
`( 10 ) Patent No . : US 10 , 080 , 178 B2
`( 45 ) Date of Patent :
`* Sep . 18 , 2018
`
`@ ( * ) Notice :
`
`( 54 ) DISTRIBUTED ANTENNA SYSTEM
`( 71 ) Applicant : Dali Wireless , Inc . , Menlo Park , CA
`( US )
`( 72 ) Inventors : Shawn Patrick Stapleton , Burnaby
`( CA ) ; Paul Lemson , Woodinvile , WA
`( US ) ; Bin Lin , Burnaby ( CA ) ; Albert
`S . Lee , San Mateo , CA ( US )
`( 73 ) Assignee : Dali Wireless , Inc . , Melo Park , CA
`( US )
`Subject to any disclaimer , the term of this
`patent is extended or adjusted under 35
`U . S . C . 154 ( b ) by 0 days .
`This patent is subject to a terminal dis -
`claimer .
`( 21 ) Appl . No . : 15 / 223 , 819
`( 22 ) Filed :
`Jul . 29 , 2016
`Prior Publication Data
`( 65 )
`US 2017 / 0055198 A1
`Feb . 23 , 2017
`Related V .
`Related U . S . Application Data
`( 63 ) Com
`Continuation of application No . 14 / 800 , 515 , filed on
`( 63 )
`Jul . 15 , 2015 , now Pat . No . 9 , 419 , 837 , which is a
`( Continued )
`
`Int . Ci .
`H04W 40 / 02
`HO3F 1 / 32
`
`( 51 )
`
`( 52 )
`
`( 2009 . 01 )
`( 2006 . 01 )
`( Continued )
`U . S . CI .
`CPC . . . . . . . . . . H04W 40 / 02 ( 2013 . 01 ) ; HO3F 1 / 3247
`( 2013 . 01 ) ; H03F 3 / 24 ( 2013 . 01 ) ;
`( Continued )
`( 58 ) Field of Classification Search
`CPC . . . . . . . HO4W 40 / 02 ; H04W 72 / 04 ; H04B 7 / 022
`See application file for complete search history .
`
`( 56 )
`
`References Cited
`U . S . PATENT DOCUMENTS
`4 , 775 , 795 A
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`4 , 999 , 831 A
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`( Continued )
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`( Continued )
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`( Continued )
`
`CN
`CN CN
`
`Primary Examiner — Wei Zhao
`( 74 ) Attorney , Agent , or Firm — Kilpatrick Townsend &
`Stockton LLP
`
`( 57 )
`ABSTRACT
`The present disclosure is a novel utility of a software defined
`radio ( SDR ) based Distributed Antenna System ( DAS ) that
`is
`field
`reconfigurable and support multi - modulation
`schemes ( modulation - independent ) , multi - carriers , multi
`frequency bands and multi - channels . The present invention
`enables a high degree of flexibility to manage , control ,
`enhance , facilitate the usage and performance of a distrib
`uted wireless network such as Flexible Simulcast , automatic
`traffic load - balancing , network and radio resource optimi
`zation , network calibration , autonomous / assisted commis
`sioning , carrier pooling , automatic frequency selection , fre
`quency carrier placement , traffic monitoring , traffic tagging ,
`pilot beacon , etc . As a result , a DAS in accordance with the
`present invention can increase the efficiency and traffic
`capacity of the operators ' wireless network .
`
`30 Claims , 8 Drawing Sheets
`
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`Page 1
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`T-Mobile Ex. 1012
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`US 10 , 080 , 178 B2
`Page 2
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`( 51 )
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`( 52 )
`
`( 2006 . 01 )
`( 2006 . 01 )
`( 2006 . 01 )
`( 2009 . 01 )
`( 2006 . 01 )
`( 2009 . 01 )
`( 2009 . 01 )
`( 2006 . 01 )
`( 2009 . 01 )
`( 2017 . 01 )
`
`Related U . S . Application Data
`continuation of application No . 14 / 260 , 145 , filed on
`Apr . 23 , 2014 , now Pat . No . 9 , 137 , 078 , which is a
`continuation of application No . 13 / 211 , 247 , filed on
`Aug . 16 , 2011 , now Pat . No . 8 , 737 , 300 .
`( 60 ) Provisional application No . 61 / 439 , 940 , filed on Feb .
`7 , 2011 .
`Int . Ci .
`H03F 3 / 24
`H04L 25 / 03
`H04L 27 / 36
`H04W 24 / 02
`H04B 1 / 04
`H04W 24 / 04
`H04W 40 / 00
`H04L 27 / 26
`H04W 72 / 04
`H04B 77022
`U . S . Ci .
`H04B 1 / 0475 ( 2013 . 01 ) ; H04B 7 / 022
`( 2013 . 01 ) ; H04L 25 / 03343 ( 2013 . 01 ) ; H04L
`27 / 2618 ( 2013 . 01 ) ; H04L 27 / 362 ( 2013 . 01 ) ;
`H04W 24 / 02 ( 2013 . 01 ) ; H04W 24 / 04
`( 2013 . 01 ) ; H04W 40 / 00 ( 2013 . 01 ) ; H04W
`72 / 04 ( 2013 . 01 ) ; H04W 72 / 0453 ( 2013 . 01 ) ;
`HO3F 2200 / 336 ( 2013 . 01 ) ; HO3F 2200 / 57
`( 2013 . 01 ) ; HO3F 2201 / 3224 ( 2013 . 01 ) ; HO3F
`2201 / 3233 ( 2013 . 01 ) ; H04B 2001 / 0425
`( 2013 . 01 ) ; H04L 2025 / 03414 ( 2013 . 01 )
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`Excerpts from Patent Owner ' s Invalidity Contentions regarding
`U . S . Pat . No . 7 , 639 , 982 served in related matter CommScope
`Technologies LLC v . Dali Wireless , Inc . , Case No . 3 : 16 - cv - 00477 - B
`( N . D . Tex . ) ( “ Patent Owner ' s Invalidity Contentions Ex . C ” ) , 410
`pages . Feb . 2 , 2018 .
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`book ” , 2007 , Wiley & Sons , Inc . , 55 pages .
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`O ’ reilly & Assoc . , Inc . , 112 pages .
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`( N . D . Tex . ) , Jun . 30 , 2017 , 36 pages .
`“ Dali Wireless , Inc . ' s responsive claim construction brief ” , in :
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`Office Action for Chinese Patent Application No . 201610011597 . 9 ,
`dated Mar . 29 , 2018 , 5 pages .
`* cited by examiner
`
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`

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`Page 5
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`T-Mobile Ex. 1012
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`

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`Sep . 18 , 2018
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`Sheet 2 of 8
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`Page 6
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`T-Mobile Ex. 1012
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`

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`Page 7
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`T-Mobile Ex. 1012
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`Sep . 18 , 2018
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`Page 8
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`T-Mobile Ex. 1012
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`

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`Sep . 18 , 2018
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`Page 9
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`T-Mobile Ex. 1012
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`

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`Sep . 18 , 2018
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`Page 10
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`T-Mobile Ex. 1012
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`

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`Sep . 18 , 2018
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`Page 11
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`U . S . Patent sep 1
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`Sep . 18 , 2018
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`atent
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`Sheet 8 of 8
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`Page 12
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`5
`
`15 15
`
`US 10 , 080 , 178 B2
`DISTRIBUTED ANTENNA SYSTEM
`In order to obtain a high degree of DAS remote unit
`availability , two primary conditions must be satisfied . First ,
`CROSS - REFERENCES TO RELATED
`the DAS remote unit itself must be inherently reliable .
`Second , the transport media e . g . , optical fiber , must be very
`APPLICATIONS
`reliable . It is well known that electronic and / or optical
`connections themselves are a significant root cause of failure
`The present application is a continuation of U . S . patent
`or reduced availability in a DAS network . Companies who
`application Ser . No . 14 / 800 , 515 filed Jul . 15 . 2015 : which is
`maintain outdoor DAS networks have reported that a failure
`a continuation of U . S . patent application Ser . No . 14 / 260 ,
`of outside plant optical fiber facilities is not as rare as would
`145 , filed Apr . 23 , 2014 ; which is a continuation of U . S .
`patent application Ser . No . 13 / 211 , 247 , filed Aug . 16 , 2011 ; 11 . 10 be desirable . Therefore , it would be advantageous to employ
`systems and methods which offer higher redundancy and / or
`which claims the benefit of U . S . Provisional Patent Appli
`self - healing features in the event of failure of a transport
`cation No . 61 / 439 , 940 , filed Feb . 7 , 2011 ; the disclosures of
`media connection .
`which are hereby incorporated by reference for all purposes .
`SUMMARY OF THE INVENTION
`FIELD OF THE INVENTION
`The present invention substantially achieves the advan
`The present invention generally relates to wireless com
`tages and benefits discussed above and overcomes the
`munication systems employing Distributed Antenna Sys
`limitations of the prior art discussed above by providing a
`tems ( DAS ) as part of a distributed wireless network . More 20 distributed antenna system responsive to one or more base
`stations and having at least one but in some embodiments a
`specifically , the present invention relates to a DAS utilizing
`one or more remotely monitored and controlled digital
`plurality of Digital Access Units ( “ DAU ' s " ) , each operating
`access units configured to assign particular packet transmis -
`to control the packet traffic of an associated plurality of
`sions to selected ones of a plurality of remote units , which
`Digital Remote Units ( “ DRU ’ s ” ) . In embodiments employ
`can in some embodiments be configured in a daisy - chained 25 ing multiple DAU ' s , the DAU ' s can be daisy - chained lin
`early or in a ring configuration . Likewise , depending upon
`rings .
`the implementation , the DRU ' s associated with a given
`BACKGROUND OF THE INVENTION
`DAU can be configured in either a linear or ring Daisy chain
`configuration .
`The data received from the base stations is down - con
`Wireless and mobile network operators face the continu - 30
`verted , digitized and converted to baseband with the DAU .
`ing challenge of building networks that effectively manage
`The data streams are then I / Q mapped and framed and
`high data - traffic growth rates . Mobility and an increased
`independently serialized , such that multiple data streams are
`level of multimedia content for end users requires end - to -
`available in parallel from the DAU . In at least some embodi
`end network adaptations that support both new services and
`the increased demand for broadband and flat - rate Internet 35 ments , the DAU communicates with the associated DRU ' s
`access . One of the most difficult challenges faced by net -
`via an optical transport arrangement . It will be appreciated
`work operators is maximizing the capacity of their DAS
`by those skilled in the art that , using the present invention ,
`networks while ensuring cost - effective DAS deployments
`it is possible to configure a distributed antenna system
`and at the same time providing a very high degree of DAS
`having n base stations , each providing m RF outputs for
`remote unit availability .
`40 transmission by one or more associated DAU ' s to o DRU ' s ,
`In order to provide DAS network capacity which is high
`where the only limits are imposed by the technical perfor
`enough to meet short - term needs of network subscribers in
`mance specifications of the particular DAS , such as delay .
`specific locations yet also avoid costly and inefficient
`By the use of a ring configuration for connecting , in at
`deployment of radio resources , DAS network planners pre -
`least some embodiments , the DRU ' s and / or the DAU ' s , fault
`fer to employ DAS architectures and solutions which pro - 45 tolerance is built into the system , with resulting high avail
`vide a high degree of dynamic flexibility . Therefore , it would
`ability . In single DAU embodiments , each DRU is acces
`be advantageous for wireless network operators to employ a
`sible through two paths , and therefore remains available
`DAS solution which has a high degree of flexibility to
`even in the event of a line break . In multi - DAU embodi
`implement dynamic rearrangements based on ever - changing
`ments , where the DAU ' s are linearly daisy - chained , each
`network conditions and subscriber needs . Also , the more 50 DRU is accessible from multiple DRU ' s such that even
`future - proof a DAS deployment can be , generally the lower
`some DAU failures will not prevent system operation . In
`its life cycle cost .
`embodiments employing a ring connection for the DAU ' s ,
`DAS network planners and system integrators employ a
`multiple paths exist to each DAU , and thus provide an
`wide range of innovative approaches for helping to ensure
`additional level of fault tolerance as well as dynamic load
`that a particular DAS deployment is as cost - effective as 55 balancing and resource management as discussed in greater
`possible . The types of costs considered by network planners
`detail hereinafter .
`and integrators include DAS deployment or DAS installa -
`Thus , the configuration of the advanced system architec
`tion cost , as well as operational costs including maintenance
`ture of the present invention provides a high degree of
`costs , emergency restoration costs and network re - arrange -
`flexibility to manage , control , enhance and facilitate the
`ment costs . Rearrangement costs are particularly significant 60 radio resource efficiency , usage , availability , and overall
`for indoor DAS applications , due to frequent changes in
`performance of the distributed wireless network . The pres
`building use and facility needs changes . Therefore , it would
`ent invention enables specialized applications and enhance
`be advantageous to employ DAS systems and methods
`m ents including Flexible Simulcast , automatic traffic load
`which are based on as few DAS transport facilities as
`balancing , network and radio resource optimization ,
`possible to minimize installation and / or lease costs and have 65 network calibration , autonomous / assisted commissioning ,
`self - hea