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`US 20180234917A1
`( 19 ) United States
`( 12 ) Patent Application Publication ( 10 ) Pub . No . : US 2018 / 0234917 A1
`( 43 ) Pub . Date :
`Aug . 16 , 2018
`KIM et al .
`
`( 54 ) METHOD AND APPARATUS FOR APPLYING
`DISCONTINUOUS RECEPTION MODE IN
`WIRELESS COMMUNICATION SYSTEM
`( 71 ) Applicant : Samsung Electronics Co . , Ltd . ,
`Gyeonggi - do ( KR )
`( 72 ) Inventors : Sangbum KIM , Gyeonggi - do ( KR ) ;
`Soenghun KIM , Gyeonggi - do ( KR ) ;
`Himke VAN DER VELDE , ZT Zwolle
`( NL ) ; Jaehyuk JANG , Gyeonggi - do
`( KR )
`( 21 ) Appl . No . :
`15 / 751 , 079
`Aug . 8 , 2016
`( 22 ) PCT Filed :
`( 86 ) PCT No . :
`PCT / KR2016 / 008705
`$ 371 ( c ) ( 1 ) ,
`( 2 ) Date :
`
`Feb . 7 , 2018
`
`Related U . S . Application Data
`( 60 ) Provisional application No . 62 / 202 , 416 , filed on Aug .
`7 , 2015 .
`
`Publication Classification
`
`( 2006 . 01 )
`( 2006 . 01 )
`( 2006 . 01 )
`
`( 51 ) Int . CI .
`H04W 52 / 02
`H04W 72 / 04
`H04W 76 / 28
`U . S . CI .
`CPC . . . H04W 52 / 0216 ( 2013 . 01 ) ; H04W 72 / 0433
`( 2013 . 01 ) ; H04W 76 / 28 ( 2018 . 02 ) ; H04W
`72 / 042 ( 2013 . 01 )
`
`( 52 )
`
`ABSTRACT
`( 57 )
`The present disclosure relates to a 5G or pre - 56 communi
`cation system for supporting a higher data transmission rate
`beyond a 4G communication system such as LTE . A method
`performed by a terminal , according to the present invention ,
`comprises : receiving system information from a base sta
`tion ; when the system information includes first information
`related to a second DRX operating in
`a second cycle ,
`transmitting , to a mobility management entity ( MME ) , a
`request message including second information related to the
`second DRX ; receiving , from the MME , a response message
`corresponding to the request message ; and if the response
`message includes third information related to the second
`DRX , performing a second DRX operation on the basis of
`the third information .
`
`901
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 20 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 20 of 33
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 21 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 21 of 33
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 22 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 22 of 33
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`US 2018 / 0234917 A1
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`0161
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`APPLE INC. / Page 23 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 23 of 33
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 24 of 64
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`

`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 24 of 33
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 25 of 64
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`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 25 of 33
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`US 2018 / 0234917 A1
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`APPLE INC. / Page 26 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 26 of 33
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`US 2018 / 0234917 A1
`
`FIG . 23
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` Ex. 1024
`APPLE INC. / Page 27 of 64
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`Patent Application Publication
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`Aug . 16 , 2018 Sheet 27 of 33
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`US 2018 / 0234917 A1
`
`FIG . 24
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`APPLE INC. / Page 28 of 64
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`

`Patent Application Publication
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`Aug . 16 , 2018 Sheet 28 of 33
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`US 2018 / 0234917 A1
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`2550
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` Ex. 1024
`APPLE INC. / Page 29 of 64
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`

`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 29 of 33
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`US 2018 / 0234917 A1
`
`Monitoring
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`APPLE INC. / Page 30 of 64
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`

`Patent Application Publication Aug . 16 , 2018 Sheet 30 of 33 US 2018 / 0234917 A1
`
`FIG . 27
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`APPLE INC. / Page 31 of 64
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`

`

`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 31 of 33
`
`US 2018 / 0234917 A1
`
`FIG . 28
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`APPLE INC. / Page 32 of 64
`
`

`

`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 32 of 33
`
`US 2018 / 0234917 A1
`
`FIG . 29
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` Ex. 1024
`APPLE INC. / Page 33 of 64
`
`

`

`Patent Application Publication
`
`Aug . 16 , 2018 Sheet 33 of 33
`
`US 2018 / 0234917 A1
`
`3030
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`BACKHAUL
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` Ex. 1024
`APPLE INC. / Page 34 of 64
`
`

`

`US 2018 / 0234917 A1
`
`Aug . 16 , 2018
`
`METHOD AND APPARATUS FOR APPLYING
`DISCONTINUOUS RECEPTION MODE IN
`WIRELESS COMMUNICATION SYSTEM
`TECHNICAL FIELD
`The present invention relates to a mobile commu
`[ 0001 ]
`nication system and , more particularly , to a method and
`apparatus for applying a discontinuous reception mode in a
`wireless communication system .
`BACKGROUND ART
`[ 0002 ] To meet the demand for wireless data traffic having
`increased since deployment of 4G communication systems ,
`efforts have been made to develop an improved 5G or
`pre - 56 communication system . Therefore , the 5G or pre - 5G
`communication system is also called a ‘ Beyond 4G Net
`work or a “ Post LTE System ’ . The 5G communication
`system is considered to be implemented in higher frequency
`( mm Wave ) bands , e . g . , 60 GHz bands , so as to accomplish
`higher data rates . To decrease propagation loss of the radio
`waves and increase the transmission distance , the beam
`forming , massive multiple - input multiple - output ( MIMO ) ,
`Full Dimensional MIMO ( FD - MIMO ) , array antenna , an
`analog beam forming , large scale antenna techniques are
`discussed in 5G communication systems . In addition , in 5G
`communication systems , development for system network
`improvement is under way based on advanced small cells ,
`cloud Radio Access Networks ( RANs ) , ultra - dense net
`works , device - to - device ( D2D ) communication , wireless
`backhaul , moving network , cooperative communication ,
`Coordinated Multi - Points ( COMP ) , reception - end interfer
`ence cancellation and the like . In the 5G system , Hybrid
`FSK and QAM Modulation ( FQAM ) and sliding window
`superposition coding ( SWSC ) as an advanced coding modu
`lation ( ACM ) , and filter bank multi carrier ( FBMC ) , non
`orthogonal multiple access ( NOMA ) , and sparse code mul
`tiple access ( SCMA ) as an advanced access technology have
`been developed .
`[ 0003 ] The Internet , which is a human centered connec
`tivity network where humans generate and consume infor
`mation , is now evolving to the Internet of Things ( IoT )
`where distributed entities , such as things , exchange and
`process information without human intervention . The Inter
`net of Everything ( IOE ) , which is a combination of the IoT
`technology and the Big Data processing technology through
`connection with a cloud server , has emerged . As technology
`elements , such as “ sensing technology " , " wired / wireless
`communication and network infrastructure ” , “ service inter
`face technology ” , and “ Security technology ” have been
`demanded for IoT implementation , a sensor network , a
`Machine - to - Machine ( M2M ) communication , Machine
`Type Communication ( MTC ) , and so
`forth have been
`recently researched . Such an IoT environment may provide
`intelligent Internet technology services that create a new
`value to human life by collecting and analyzing data gen
`erated among connected things . IoT may be applied to a
`variety of fields including smart home , smart building , smart
`city , smart car or connected cars , smart grid , health care ,
`smart appliances and advanced medical services through
`convergence and combination between existing Information
`Technology ( IT ) and various industrial applications .
`[ 0004 ]
`In line with this , various attempts have been made
`to apply 5G communication systems to IoT networks . For
`
`example , technologies such as a sensor network , Machine
`Type Communication ( MTC ) , and Machine - to - Machine
`( M2M ) communication may be implemented by beamform
`ing , MIMO , and array antennas . Application of a cloud
`Radio Access Network ( RAN ) as the above - described Big
`Data processing technology may also be considered to be as
`an example of convergence between the 5G technology and
`the IoT technology . Accordingly , various attempts are now
`made to apply the 5G communication system to the IoT
`network . For example , technologies such as a sensor net
`work , machine - to - machine ( M2M ) , and machine type com
`munication ( MTC ) are implemented by techniques such as
`beamforming , MIMO , and array antennas which belong to
`the 5G communication technology . To apply a cloud radio
`access network ( cloud RAN ) for the above - mentioned big
`data processing technology is an example of the fusion of the
`5G technology and the IoT technology .
`10005 ]
`In general , wireless communication systems have
`been developed for the purpose of providing communication
`while maintaining user ' s mobility . Recently , the wireless
`communication technology has achieved a significant
`growth , and also the communication system technology is
`steadily evolving . With the rapid progress of such technolo
`gies , the wireless communication system has reached the
`stage of providing a high - speed data communication service
`as well as voice communication . In recent years , the next
`generation mobile communication system is evolving from
`human - to - human ( H2H ) communication into human - to - ma
`chine ( H2M ) communication and machine - to - machine
`( M2M ) communication .
`[ 0006 ] On the other hand , as a terminal becomes more
`sophisticated , there is a need of a method for reducing the
`power consumption of the terminal in order to improve
`battery performance . To reduce power consumption , the
`terminal may operate in a discontinuous reception ( DRX )
`mode . The terminal may perform a reception operation to
`receive a paging signal from a base station . However , since
`the paging signal is not transmitted frequently , the power
`loss becomes large if the terminal performs the reception
`operation even during no arrival of the paging signal .
`Therefore , in order to reduce power consumption , the recep
`tion operation for receiving the paging signal may be
`periodically performed only during a specific time period .
`This is referred to as DRX .
`[ 0007 ] Further , a method for increasing a DRX cycle to
`improve power consumption is being discussed . This is
`referred to as extended DRX ( eDRX ) . However , some
`terminal , some base station , and some mobility management
`entity ( MME ) may not support the eDRX . Therefore , a
`method for operating in the eDRX mode by identifying
`whether such entities support the eDRX is needed .
`10008 ]
`In addition , the base station may notify a change of
`system information to the terminal through a paging mes
`sage . However , when the extended DRX is applied , there
`may be a case incapable of receiving the paging message ,
`and the terminal may fail to know whether the system
`information is changed . Therefore , the terminal needs a
`method for identifying whether the system information is
`changed .
`
`DISCLOSURE OF INVENTION
`Technical Problem
`In order to solve the above problems , the present
`[ 0009 ]
`invention provides a method for a terminal to apply the
`eDRX after identifying whether a base station and an MME
`support the eDRX .
`
` Ex. 1024
`APPLE INC. / Page 35 of 64
`
`

`

`US 2018 / 0234917 A1
`
`Aug . 16 , 2018
`
`In addition , when the eDRX is applied , the present
`[ 0010 ]
`invention provides a method for a terminal to identify
`whether system information is changed , and to receive the
`changed system information .
`Solution to Problem
`A method of a terminal according to the present
`[ 0011 ]
`invention comprises receiving system information from a
`base station , transmitting , if the system information includes
`first information related to a second DRX operating in a
`second cycle , a request message including second informa
`tion related to the second DRX to a mobility management
`entity ( MME ) , receiving a response message corresponding
`to the request message from the MME , and performing ,
`when the response message includes third information
`related to the second DRX , an operation of the second DRX
`based on the third information .
`[ 0012 ]
`In addition , a method of a base station according to
`the present invention comprises transmitting , when the base
`station supports a second DRX operating in a second cycle ,
`system information including first information related to the
`second DRX to a terminal , receiving a paging message
`including third information related to the second DRX from
`a mobility management entity ( MME ) , and performing an
`operation of the second DRX based on the third information .
`[ 0013 ]
`In addition , a method of a mobility management
`entity ( MME ) according to the present invention comprises
`receiving , when a terminal receives system information
`including first information related to a second DRX oper
`ating in a second cycle , a request message including second
`information related to the second DRX from the terminal ,
`transmitting a response message including third information
`related to the second DRX in response to the request
`message to the terminal , and transmitting a paging message
`including the third information to a base station .
`[ 0014 ] .
`In addition , a terminal according to the present
`invention comprises a transceiver configured to transmit or
`receive a signal to or from other network entity , and a
`controller configured to receive system informatio