( 12 ) United States Patent
`Chen et al .
`
`( 10 ) Patent No .: US 10,743,238 B2
`Aug. 11 , 2020
`( 45 ) Date of Patent :
`
`US010743238B2
`
`( 72 )
`
`( * ) Notice :
`
`( 54 ) SYSTEM INFORMATION UPDATES IN
`BAND WIDTH PART ( BWP ) SWITCH
`OPERATION
`( 71 ) Applicant : FG Innovation Company Limited ,
`Tuen Mun ( HK )
`Inventors : Hung - Chen Chen , Hsinchu ( TW ) ;
`Chie - Ming Chou , Hsinchu ( TW )
`( 73 ) Assignee : FG Innovation Company Limited ,
`Tuen Mun ( HK )
`Subject to any disclaimer , the term of this
`patent is extended or adjusted under 35
`U.S.C. 154 ( b ) by 0 days .
`( 21 ) Appl . No .: 16 / 191,465
`( 22 ) Filed :
`Nov. 15 , 2018
`( 65 )
`
`Prior Publication Data
`US 2019/0150064 A1 May 16 , 2019
`
`Related U.S. Application Data
`( 60 ) Provisional application No. 62 / 586,598 , filed on Nov.
`15 , 2017
`( 51 ) Int . Ci .
`H04W 4/00
`H04W 48/10
`H04W 48/12
`
`( 2018.01 )
`( 2009.01 )
`( 2009.01 )
`
`( 52 ) U.S. Ci .
`CPC
`
`( 58 )
`
`( 56 )
`
`H04W 48/10 ( 2013.01 ) ; H04W 48/12
`( 2013.01 )
`Field of Classification Search
`HO4W 48/10 ; HO4W 48/12
`CPC
`370/328 , 329 , 330
`USPC
`See application file for complete search history .
`References Cited
`U.S. PATENT DOCUMENTS
`2/2019 Agiwal
`5/2019 Zhou
`
`H04W 76/27
`HO4L 5/0098
`
`2019/0053029 A1 *
`2019/0132109 A1 *
`* cited by examiner
`Chuong T Ho
`Primary Examiner
`( 74 ) Attorney , Agent , or Firm
`ScienBizip , P.C.
`( 57 )
`ABSTRACT
`A user equipment ( UE ) for wireless communication is
`configured to perform bandwidth part ( BWP ) switching
`operation in response to receiving a system information
`change indication . The UE receives the system information
`change indication via a currently active BWP in a BCCH
`modification period . The system information change indi
`cation notifies the UE that contents of system information
`have been changed . The UE switches from the currently
`active BWP to an initial active BWP to receive the changed
`contents of system information which are required for the
`UE . The UE receives the changed contents of system
`information via the initial active BWP in a next BCCH
`modification period that immediately follows the BCCH
`modification period . The UE updates the system information
`according to the changed contents .
`20 Claims , 10 Drawing Sheets
`
`101
`
`1
`
`103
`
`Indicated BWP
`
`Initial Active BWP .
`
`BCCH Modification
`Period n
`
`BCCH Modification
`! Period n + 1
`1
`Modification
`Period Boundary
`
`...
`1
`www
`Modification
`Period Boundary
`
`BCCH Modification
`Period n + 2
`
`Ex.1001
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`

`

`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 1 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`103
`
`101
`
`
`
`Initiat Active BWP
`
`
`
`Indicated BWP
`
`FIG . 1
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`! Period n + 1
`
`-
`
`
`
`BCCH Modification Period n
`
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`

`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 2 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`203
`
`201
`
`FIG . 2
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`
`
`
`
`Initial Active BWP
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
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`

`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 3 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`FIG . 3
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`Initiat Active BWP .
`
`303
`
`301
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
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`

`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 4 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`403
`
`401
`
`FIG . 4
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`
`
`
`
`initial Active BWP
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
`Ex.1001
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`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 5 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`5
`
`FIG .
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`! Period n + 1
`
`-
`
`505
`
`501 503
`
`
`
`
`
`Initial Active BWP
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
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`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 6 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`605
`
`601 603
`
`FIG . 6
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`
`
`
`
`Initial Active BWP
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
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`

`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 7 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`703
`
`701
`
`
`
`
`
`Initiat Active BWP
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
`FIG . 7
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
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`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 8 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`803
`
`801
`
`
`
`
`
`Initiat Active BWP
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`! Period n + 1
`
`-
`
`
`
`Indicated BWP
`
`
`
`BCCH Modification Period n
`
`FIG . 8
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
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`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 9 of 10
`
`US 10,743,238 B2
`
`Period n + 2
`
`905
`
`901 903
`
`
`
`Initiat Active BWP
`
`
`
`Indicated BWP
`
`FIG . 9
`
`
`
`Modification Period Boundary
`Modification Period Boundary
`
`
`
`
`BCCH Modification BCCH Modification
`
`
`
`
`
`! Period n + 1
`
`-
`
`
`
`BCCH Modification Period n
`
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`U.S. Patent
`
`Aug. 11 , 2020
`
`Sheet 10 of 10
`
`US 10,743,238 B2
`
`1026
`
`1028
`Memory
`
`1030
`
`Data
`
`1032
`
`Instructions
`
`1034
`Presentation
`Components
`
`1000
`
`1020
`
`Transceiver
`
`Transmitter
`
`Receiver
`
`Processor
`
`Data
`
`7
`i Instructions
`L.
`
`-1036
`
`1022
`1024
`
`1026
`
`1030
`
`1032
`
`FIG . 10
`
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`US 10,743,238 B2
`
`15
`
`1
`SYSTEM INFORMATION UPDATES IN
`BAND WIDTH PART ( BWP ) SWITCH
`OPERATION
`
`2
`In one aspect of the present disclosure , a user equipment
`( UE ) of a connected state is configured to receive a system
`information ( SI ) change indication broadcasted by a paging
`via a currently active bandwidth part ( BWP ) during a
`5 modification period ; to switch from the currently active
`CROSS REFERENCE TO RELATED
`bandwidth part ( BWP ) for data transmission to an initial
`APPLICATIONS
`active BWP for an SI update ; to receive remaining minimum
`SI ( RMSI ) via the initial active BWP during a next modi
`This application claims the benefit of and priority to U.S.
`fication period that immediately follows the modification
`Provisional Application No. 62 / 586,598 filed on Nov. 15 ,
`10 period , the RMSI including information associated with
`2017 and entitled “ SYSTEM INFORMATION UPDATE IN
`changed system information blocks ( SIBs ) ; to determine
`BWP SWITCH OPERATION , ” ( hereinafter referred to as
`which of the changed SIBs is required to be updated for the
`“ US72315 application " ) . The disclosure of the US72315
`application is hereby incorporated fully by reference into the UE ; and to receive content of the required changed SIBs
`based on the determination .
`present disclosure .
`BRIEF DESCRIPTION OF THE DRAWINGS
`TECHNICAL FIELD
`Aspects of the exemplary disclosure are best understood
`The present disclosure generally relates to a method for
`from the following detailed description when read with the
`bandwidth part switching operations performed by a user 20 accompanying figures . Various features are not drawn to
`equipment and user equipment performing the same .
`scale , dimensions of various features may be arbitrarily
`increased or reduced for clarity of discussion .
`BACKGROUND
`FIG . 1 is a schematic diagram illustrating a BWP switch
`ing operation for a Connected_UE due to receiving an SI
`In a cellular network , a UE - specific serving cell may 25 change indication in accordance with one exemplary
`embodiment of the present disclosure .
`configure one or more bandwidth parts ( BWPs ) in downlink
`and uplink respectively for a UE by dedicated RRC signal
`FIG . 2 is a schematic diagram illustrating a BWP switch
`ing . One the other hand , a UE may be allocated to with at
`ing operation for a Connected_UE due to receiving an SI
`most one active DL BWP and one active UL BWP at a given
`change indication in accordance with one exemplary
`time by the cell . A single scheduled downlink control 30 embodiment of the present disclosure .
`information ( DCI ) may be applied to switching from one
`FIG . 3 is a schematic diagram illustrating a BWP switch
`ing operation for a Connected_UE due to receiving an SI
`active BWP to another for an operating UE .
`For a UE , an initial active DL BWP is defined as the
`change indication in accordance with one exemplary
`frequency location and bandwidth dedicated for broadcast
`embodiment of the present disclosure .
`ing remaining minimum SI ( RMSI ) . When the NW sends to 35
`FIG . 4 is a schematic diagram illustrating a BWP switch
`a Connected_UE a system information ( SI ) change indica
`ing operation for a Connected_UE due to receiving an SI
`tion that notifies of system information change , the Con
`change indication in accordance with one exemplary
`nected_UE may have to switch from the currently active
`embodiment of the present disclosure .
`BWP to the initial active BWP for accessing the RMSI and
`FIG . 5 is a schematic diagram illustrating a BWP switch
`updating to the changed SI if there is no SI broadcasting on 40 ing operation for a Connected_UE due to receiving an SI
`the currently active BWP . Furthermore , the Connected_UE
`change indication in accordance with one exemplary
`may not successfully complete SI update if there is no clear
`embodiment of the present disclosure .
`UE behavior defined for BWP switching . As a result of BWP
`FIG . 6 is a schematic diagram illustrating a BWP switch
`switching inability problem , the UE may not be able to
`ing operation for a Connected_UE due to receiving an SI
`update system information .
`45 change indication in accordance with one exemplary
`embodiment of the present disclosure .
`FIG . 7 is a schematic diagram illustrating a BWP switch
`SUMMARY
`ing operation for a Connected_UE due to receiving a public
`warning system ( PWS ) notification indication in accordance
`The present disclosure is directed to bandwidth part
`( BWP ) switching operations in conjunction with system 50 with one exemplary embodiment of the present disclosure .
`information updates for a user equipment .
`FIG . 8 is a schematic diagram illustrating a BWP switch
`In one aspect of the present disclosure , a method for
`ing operation for a Connected_UE due to receiving a public
`bandwidth part ( BWP ) operations performed by a user
`warning system ( PWS ) notification indication in accordance
`equipment ( UE ) of a connected state is provided . The
`with one exemplary embodiment of the present disclosure .
`method comprises receiving a system information ( SI ) 55
`FIG . 9 is a schematic diagram illustrating a BWP switch
`change indication broadcasted by a paging via a currently
`ing operation for a Connected_UE due to receiving a public
`active bandwidth part ( BWP ) during a modification period ;
`warning system ( PWS ) notification indication in accordance
`switching from the currently active bandwidth part ( BWP )
`with one exemplary embodiment of the present disclosure .
`for data transmission to an initial active BWP for an SI
`FIG . 10 is a block diagram of a device for wireless
`update ; receiving remaining minimum SI ( RMSI ) via the 60 communication in accordance with various embodiments of
`initial active BWP during a next modification period that
`the present disclosure .
`immediately follows the modification period , the RMSI
`including information associated with changed system infor
`DETAILED DESCRIPTION
`mation blocks ( SIBs ) ; determining which of the changed
`SIBs is required to be updated for the UE ; and receiving 65
`The following description contains specific information
`content of the required changed SIBs based on the determi
`pertaining to exemplary implementations in the present
`disclosure . The drawings
`the present disclosure and their
`nation .
`
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`US 10,743,238 B2
`
`4
`3
`accompanying detailed description are directed to merely BWP inactivity timer ) or operate on an initial active DL
`exemplary implementations . However , the present disclo
`BPW able to receive the content of changed SI required for
`sure is not limited to merely these exemplary implementa
`the UE SI update . The UE may also have an uplink ( UL )
`tions . Other variations and implementations of the present BWP for UL data transmission and an initial active UL
`disclosure will occur to those skilled in the art . Unless noted 5 BWP . Within nth broadcast control channel modification
`otherwise , like or corresponding elements among the figures
`period ( denoted as BCCH modification period n ) , the UE
`may be indicated by like or corresponding reference numer
`may operate on the indicated BWP as the currently active
`als . Moreover , the drawings and illustrations in the present BWP for data transmission according to L1 signaling .
`disclosure are generally not to scale , and are not intended to
`The SI change indication is sent to the UE by paging ( e.g. ,
`correspond to actual relative dimensions .
`10 a Short Message ) from the NW while the UE operates on the
`The description uses the phrases “ in one implementation , "
`indicated BWP . Specifically , the UE receives indications
`or “ in some implementations , ” which may each refer to one
`about SI modifications and / or PWS notifications using Short
`or more of the same or different implementations . The term
`Message transmitted with P - RNTI over downlink control
`" coupled ” is defined as connected , whether directly or
`information ( DCI ) . At 101 , upon receiving the SI change
`indirectly through intervening components , and is not nec- 15 indication , UE may switch immediately to the initial active
`essarily limited to physical connections . The term " compris
`BWP from the indicated BWP during BCCH modification
`ing , " when utilized , means “ including , but not necessarily
`period n . The SI change indication is used to inform the UE
`limited to ” ; it specifically indicates open - ended inclusion or
`that there is a system information change ( s ) or update ( s ) ,
`membership in the so - described combination , group , series
`and may be carried as part of the Short Message . Then , RRC
`and the equivalent .
`20 sublayer of the NW may inform the PHY sublayer that the
`It is noted that the term “ and / or ” includes any and all
`paging has been sent to the UE and the switching of the UE
`combinations of one or more of the associated listed items .
`to the initial active BWP has been performed . So , the NW
`It will also be understood that , although the terms first ,
`may stop sending to the UE any other L1 signaling ( e.g. ,
`second , third etc. may be used herein to describe various
`DCI ) for BWP switching operations .
`elements , components , regions , parts and / or sections , these 25
`After switching to the initial active BWP , the UE may
`elements , components , regions , parts and / or sections should
`continue to stay on the initial active BWP until BCCH
`not be limited by these terms . These terms are only used to
`modification period n + 1 ends . The BCCH modification
`distinguish one element , component , region , part or section
`period n + 1 immediately follows the BCCH modification
`from another element , component , region , layer or section .
`period n in time sequence . Although the UE has switched to
`Thus , a first element , component , region , part or section 30 the initial active BWP at certain timing ( e.g. , at 101 ) within
`discussed below could be termed a second element , com
`BCCH modification period n , it is in the next BCCH
`ponent , region , layer or section without departing from the
`modification period n + 1 that the UE performs the system
`information acquisition to update to changed system infor
`teachings of the present disclosure .
`It should be noted that , in the present disclosure , a UE mation . In modification period n + 1 , the UE may receive
`may include , but is not limited to , a mobile station , a mobile 35 broadcast remaining minimum system information ( RMSI )
`terminal or device , a user communication radio terminal . For
`carrying information associated with changed system infor
`example , a UE may be a portable radio equipment , which
`mation blocks ( SIBs ) via the initial active BWP and perform
`includes , but is not limited to , a mobile phone , a tablet , a
`the SI update ( s ) according to the information . The RMSI is
`wearable device , a sensor , a personal digital assistant ( PDA ) ,
`also known as SIB1 ( system information block 1 ) . The UE
`or a television display with wireless communication capa- 40 may receive the RMSI at certain time point in modification
`bility . The UE is configured to receive and transmit signals
`period n + 1 ( e.g. , at the start time point of the modification
`over an air interface to one or more cells in a radio access
`period n + 1 ) . After receiving the RMSI , the UE may deter
`mine which of the changed SIB ( s ) is ( or are ) required for the
`network .
`A base station may include , but is not limited to a node B
`SI update ( s ) according to the received information . For
`( NB ) as in the UMTS , an evolved node B ( NB ) as in the 45 example , the UE may identify one or more of the changed
`LTE - A , a radio network controller ( RNC ) as in the UMTS ,
`SIB ( s ) that the UE requires for the SI update ( s ) . Then the UE
`a base station controller ( BSC ) as in the GSM / GERAN , an
`may receive the content ( s ) of the changed SIBs which are
`NG - NB as in an E - UTRA base station in connection with
`identified as being required for the SI update ( s ) based on the
`the 5GC , a next generation node B ( GNB ) as in the 5G
`determination . For another example , the UE may identify
`Access Network ( 5G - AN ) , and any other apparatus capable 50 none of the changed SIBs is required to update and may not
`of controlling radio communication with cellular positioning
`perform any SI update ( s ) . The UE may not update the
`technology and managing radio resources within a cell . The
`changed SIB ( s ) based on the identification within BCCH
`base station may connect to serve the one or more UEs modification period n + 1 .
`After the UE completes the SI update ( s ) , the NW may
`through a radio interface to the network .
`In one embodiment of the present disclosure , a Connect- 55 re - take control over the BWP switching of the UE on the end
`ed_UE may implicitly switch to an initial active BWP upon
`of BCCH modification period n + 1 .
`receiving a system information ( SI ) change indication
`In this case , since the NW may know the UE by default
`broadcasted by paging from cellular network ( NW ) . The SI
`will complete the SI update within modification period n + 1 ,
`change indication indicates a SI change / modification and
`the PHY sublayer may re - take control over the BWP switch
`notifies the UE to update to the changed SI if required by the 60 ing after BCCH modification period n + 1 ends . Therefore , at
`UE . This results in reduction of redundant L1 signaling for
`103 on the ending boundary of modification period n + 1 the
`switching from a currently active BWP to the initial active
`NW re - takes the BWP switching operations by sending L1
`BWP for the UE . In FIG . 1 , a BWP switching operation for
`signaling to switch the initial active BWP to a BWP for
`a Connected_UE due to receiving an SI change indication is
`subsequent data transmission .
`illustrated . In DL , the UE may operate on an indicated BWP 65
`In one embodiment , the currently active BWP happens to
`as currently active DL BWP for DL data transmission ( e.g. ,
`be the initial active BWP . In this case , it is not necessary that
`based on RRC configuration , DCI control or the behavior for
`a BWP switching operation is involved for updating the SI
`
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`US 10,743,238 B2
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`10
`
`5
`6
`The UE feedback of SI update complete may be sent by
`when receiving the SI change indication . For example , the
`L1 signaling ( via PUCCH ) or by MAC - CE transmission on
`Connected UE has already been on the initial active BWP as
`an uplink ( UL ) BWP paired with the initial active DL BWP .
`currently active BWP because of certain on - going services
`If using L1 signaling , the upper sublayer ( e.g. , RRC ) of the
`in modification period n and will stay on the initial active
`BWP to perform system information acquisition to conduct 5 UE may inform PHY sublayer that the SI update is com
`the SI update in BCCH modification period n + 1 . The PHY
`pleted , and the UE PHY sublayer may feedback it to the NW .
`sublayer of the NW may consider the completeness of the SI
`The NW may re - take control over the BWP switching after
`update in the next BCCH modification period n + 1 . Then , the
`receiving the feedback in NW PHY sublayer . Alternatively ,
`PHY sublayer of the NW may re - take control over the BWP if using MAC - CE transmission , the upper sublayer of the
`switching operation on the end of BCCH modification UE may inform MAC sublayer that the system information
`period n + 1 .
`update is completed , and the UE MAC sublayer may feed
`In one embodiment , the UE may be only permitted to
`back it to the NW . The NW may re - take control over the
`receive the Short Message of the paging on the initial active BWP switching once receiving the feedback in NW MAC
`BWP . For example , based on the paging frame and paging
`sublayer .
`15
`occasion derived from an associated UE ID and per - config
`In one embodiment of the present disclosure , upon receiv
`ured parameters , the Short Message cannot be broadcasted
`ing the SI change indication , the UE may not switch to the
`on other BWPs but the initial active BWP . On occasions , the
`initial active BPW until the current BCCH modification
`UE may switch to the initial active BWP automatically to
`period ends . In FIG . 3 , a BWP switching operation for an
`detect whether there is a Short Message and receiving the 20 RRC_connected UE due to receiving an SI change indica
`Short Message . If receiving the SI change indication carried
`tion is illustrated . The UE may operate on an indicated BWP
`in the Short Message , the UE may stay on the initial active
`as currently active BWP for data transmission or operate on
`BWP for the subsequent SI update without the need for
`an initial active BPW able to receive the content of changed
`additional BWP switching . If receiving no Short Message or
`SI required for the UE SI update . Within BCCH modifica
`no SI change indication carried in the Short Message , the UE 25 tion period n , the UE may operate on the indicated BWP for
`may switch back to the previous active BWP without
`data transmission according to L1 signaling .
`involvement of the NW . Alternatively , the UE may not
`The SI change indication is sent to the UE by paging ( e.g. ,
`switch back but stay on the initial active BWP after modi
`a Short Message ) from the NW while the UE may operate
`fication period n + 1 ends , waiting for next L1 signaling from
`on the indicated BWP . At 301 , upon receiving the SI change
`the NW ( e.g. , DCI ) for BWP switching .
`30 indication , UE may continue to stay on the indicated BWP
`In one embodiment of the present disclosure , the Con
`instead of switching immediately to the initial active BWP .
`nected UE may feedback to the NW while the SI update is
`Then , the UE switches to the initial active BWP automati
`completed , and the NW may re - take control over the BWP cally on the ending boundary of BCCH modification period
`switching immediately upon receiving the feedback . In FIG .
`n . The BWP switching operation ( s ) for the UE could be still
`2 , a BWP switching operation for an RRC_connected UE 35 performed for certain required services before the automatic
`due to receiving an SI change indication is illustrated . The
`switching to the initial active BWP takes place on the end of
`UE may operate on an indicated BWP as currently active
`BCCH modification period n .
`BWP for data transmission or operate on an initial active
`In this case , PHY sublayer of the NW may know that the
`BPW able to receive the content of changed SI required for
`UE switches to the initial active BWP automatically on the
`the UE SI update . Within modification period n , the UE may 40 end of BCCH modification period n , and may stop sending
`operate on the indicated BWP for data transmission accord
`to the UE any other L1 signaling for BWP switching
`ing to L1 signaling .
`operations after modification period n ends . The PHY sub
`The SI change indication is sent to the UE by paging ( e.g. ,
`layer of the NW may know the UE by default will complete
`a Short Message ) from the NW while the UE may operate
`the SI update within the next modification period n + 1 , the
`on the indicated BWP . At 201 , upon receiving the SI change 45 PHY sublayer may re - take control over the BWP switching
`indication , UE may switch to the initial active BWP imme
`after BCCH modification period n + 1 ends . Therefore , at 303
`diately from the indicated BWP in BCCH modification
`on the ending boundary of modification period n + 1 the NW
`period n . The SI change indication is used to inform the UE re - takes the BWP switching operations by sending L1 sig
`that there is SI change ( s ) or update ( s ) , and may be carried as
`naling to switch the initial active BWP to a BWP for data
`part of Short Message in the paging . Then , RRC sublayer of 50 transmission .
`the NW may inform the PHY sublayer that the paging has
`After switching to the initial active BWP on the end of
`been sent to the UE and the switching of the UE to the initial
`modification period n , the UE may wait to receive , via the
`active BWP has been performed . So , the NW may stop
`initial active BWP , broadcast information required for
`sending to the UE any other L1 signaling for BWP switching
`updating to the changed SI in a next BCCH modification
`operations , and wait for the UE feedback indicating the 55 period directly following modification period n . Therefore ,
`completeness of the SI update .
`within BCCH modification period n + 1 ( the next BCCH
`After switching to the initial active BWP , the UE may
`modification period as shown in FIG . 3 ) , the UE performs
`continue to stay on the initial active BWP until the update to
`the system information acquisition to update the changed
`SI is completed . At 203 , the UE completed the SI update if
`system information if required .
`required and feedback to the NW that the system informa- 60
`In this case , since the NW may know the UE by default
`tion update is completed by sending an SI update complete
`will complete the SI update within the next modification
`indication . Upon receiving the SI update complete indica
`period n + 1 , the PHY sublayer may re - take control over the
`tion as the UE feedback , the PHY sublayer of the NW may
`BWP switching after BCCH modification period n + 1 ends .
`re - take control over the BWP switching operation immedi
`Therefore , at 303 on the ending boundary of modification
`ately . Although the UE has to operate on the initial active 65 period n + 1 the NW re - takes the BWP switching operations
`BWP for the SI update in DL , the NW may be still able to
`by sending L1 signaling to switch the initial active BWP to
`schedule data transmission on the initial active BWP .
`a BWP for data transmission .
`
`Ex.1001
`APPLE INC. / Page 14 of 18
`
`

`

`US 10,743,238 B2
`
`7
`8
`501 , upon receiving the SI change indication , the UE may
`In one embodiment of the present disclosure , the Con
`not switch to the initial active BWP but continue to stay on
`nected UE may feedback to the NW while the SI update is
`completed , and the NW may take control over the BWP the indicated BWP . On the NW side , the RRC sublayer may
`switching immediately upon receiving the feedback . In FIG .
`inform the PHY sublayer that the SI change indication is
`4 , a BWP switching operation for an RRC_connected UE 5 sent to the UE . The SI change indication may be carried as
`due to receiving an SI change indication is illustrated . The
`part of the Short Message in the paging . In response to the
`UE may operate on an indicated BWP as currently active UE reception of the SI change indication , the PHY sublayer
`BWP for data transmission or operate on an initial active
`of the NW may schedule the L1 signaling and decide when
`BPW able to receive the content of changed SI required for
`to send the L1 signaling to switch the UE to the initial active
`the UE SI update . Within BCCH modification period n , the 10 BWP . After sending the SI change indication , the NW may
`UE may operate on the indicated BWP for data transmission
`perform the L1 signaling before BCCH modification period
`according to L1 signaling .
`n ends .
`The SI change indication is sent to the UE by paging ( e.g. ,
`At 503 , the UE switches to the initial active BWP in
`a Short Message ) from the NW while the UE may operate
`response to receiving the L1 signaling sent from the NW in
`on the indicated BWP . At 401 , upon receiving the SI change 15 BCCH modification period n , and the NW may also stop
`indication , UE may continue to stay on the indicated BWP sending to the UE any other L1 signaling for BWP switching
`instead of switching immediately to the initial active BWP .
`operations . In this case , the PHY sublayer of the NW may
`Then , the UE switches to the initial active BWP automati
`know the UE by default will complete the SI update within
`cally on the ending boundary of BCCH modification period
`the next modification period ( i.e. , BCCH modification
`n . The BWP switching operation ( s ) for the UE could be still 20 period n + 1 as shown in FIG . 5 ) , and the PHY sublayer may
`performed for certain required services before the automatic
`re - take control over the BWP switching after BCCH modi
`switching to the initial active BWP takes place on the end of
`fication period n + 1 ends .
`modification period n . In this case , PHY sublayer of the NW
`Thus , at 505 the NW re - takes control over the BWP
`may know that the UE switches to the initial active BWP switching operations on the ending boundary of modifica
`automatically on the end of BCCH modification period n , 25 tion period n + 1 by sending L1 signaling to switch the initial
`and may stop sending to the UE any other L1 signaling for
`active BWP to a BWP for data transmission .
`BWP switching operations after period n ends .
`Alternatively , the NW may re - take control over the BWP
`After switching to the initial active BWP on the end of
`switching operations upon receiving a feedback from the UE
`modification period n , the UE may continue to stay on the
`indicating the SI update is complete before BCCH modifi
`initial active BWP until the update of the required SI 30 cation period n + 1 ends . In FIG . 6 , the UE receives a L1
`change ( s ) is completed . At 403 , the UE complete the SI
`signaling for switching to the initial active BWP at 603 after
`update and feedback to the NW that the system information
`receiving the SI change indication at 601 in modification
`update is completed by sending an SI update complete
`period n , followed by the SI update operations in modifi
`indication . Upon receiving the SI update complete indica
`cation period n + 1 . Once the UE completes the SI update at
`tion as the UE feedback , the PHY sublayer of the NW may 35 605 , the UE feedback of SI update complete ( e.g. , an SI
`re - take control over the BWP switching operation at 403 .
`update completeness indication ) may be sent by another Li
`Although the UE has to operate on the initial active BWP for
`signaling ( via PUCCH ) or by MAC - CE transmission on an
`the SI update in DL , the NW may be still able to schedule
`uplink ( UL ) BWP paired with the initial active DL BWP . If
`using L1 signaling , the upper sublayer ( e.g. , RRC ) of the UE
`data transmission on the initial active BWP .
`The UE feedback of SI update complete may be sent by 40 may inform PHY sublayer that the SI update is completed ,
`and the UE PHY sublayer may feedback it