`( 19 ) United States
`( 12 ) Patent Application Publication ( 10 ) Pub . No . : US 2019 / 0174554 A1
`Jun . 6 , 2019
`( 43 ) Pub . Date :
`DEENOO et al .
`
`( 54 ) DISTRIBUTED CONTROL IN WIRELESS
`SYSTEMS
`( 71 ) Applicant : Sony Corporation , Tokyo ( JP )
`( 72 ) Inventors : Yugeswar DEENOO , Conshohocken ,
`PA ( US ) ; Ghyslain PELLETIER ,
`Montreal ( CA ) ; Ping Hsuan TAN ,
`Montreal ( CA ) ; Martino M FREDA ,
`Montreal ( CA )
`( 73 ) Assignee : Sony Corporation , Tokyo ( JP )
`( 21 ) Appl . No . :
`16 / 099 , 390
`( 22 ) PCT Filed :
`May 11 , 2017
`( 86 ) PCT No . :
`PCT / US2017 / 032069
`$ 371 ( c ) ( 1 ) ,
`( 2 ) Date :
`Nov . 6 , 2018
`Related U . S . Application Data
`( 60 ) Provisional application No . 62 / 334 , 704 , filed on May
`11 , 2016 , provisional application No . 62 / 400 , 810 ,
`filed on Sep . 28 , 2016 , provisional application No .
`62 / 416 , 499 , filed on Nov . 2 , 2016 , provisional appli
`cation No . 62 / 442 , 317 , filed on Jan . 4 , 2017 .
`Publication Classification
`
`( 51 )
`
`Int . Cl .
`H04W 74 / 08
`H04L 5 / 00
`H046 80 / 02
`H04W 68 / 00
`H04W 72 / 04
`
`( 2006 . 01 )
`( 2006 . 01 )
`( 2006 . 01 )
`( 2006 . 01 )
`( 2006 . 01 )
`
`( 52 )
`
`H04W 56 / 00
`( 2006 . 01 )
`( 2006 . 01 )
`H04B 7 / 06
`H04B 7 / 0408
`( 2006 . 01 )
`H04W 76 / 27
`( 2006 . 01 )
`( 2006 . 01 )
`H04W 76 / 11
`H04W 8 / 22
`( 2006 . 01 )
`( 2006 . 01 )
`H04W 16 / 14
`U . S . CI .
`CPC . . . . . . . H04W 74 / 0841 ( 2013 . 01 ) ; H04L 5 / 0098
`( 2013 . 01 ) ; H04L 5 / 0048 ( 2013 . 01 ) ; H04W
`80 / 02 ( 2013 . 01 ) ; H04W 68 / 005 ( 2013 . 01 ) ;
`H04W 72 / 0453 ( 2013 . 01 ) ; H04W 16 / 14
`( 2013 . 01 ) ; H04B 770617 ( 2013 . 01 ) ; H04B
`7 / 0408 ( 2013 . 01 ) ; H04W 76 / 27 ( 2018 . 02 ) ;
`H04W 76 / 11 ( 2018 . 02 ) ; H04W 8 / 22
`( 2013 . 01 ) ; H04W 56 / 001 ( 2013 . 01 )
`ABSTRACT
`( 57 )
`Systems , procedures , and instrumentalities are disclosed for
`distributed control in wireless systems , such as 5G flexible
`radio access technology ( RAT ) ( 5gFLEX ) . Example proce
`dures are provided for WTRU and network operation asso
`ciated with a distributed control plane architecture , connec
`tionless data transfer and dedicated system information
`acquisition . Distributed control may be provided , for
`example , by replicating a plurality of access control func
`tions ( ACFs ) using a plurality of instances in a plurality of
`different transmission / reception points ( TRPs ) with multi
`connectivity . The plurality of TRPs may concurrently pro
`vide control services to a WTRU . Centralized control func
`tions may manage core network connectivity and / or a
`plurality of user plane instances for the WTRU and / or may
`facilitate coordination between the plurality of ACF
`instances for the WTRU in the plurality of different TRPs of
`the WTRU ' s configuration .
`
`CORE CP # 27 VCORE
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`
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`TRP
`
`Logical Functions :
`RCF - RAN Central Functions
`RCCF - RAN Central Control Function
`RCUF - RAN Central User Function
`ACF - Access Control Function
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`. . .
`TRP # 1
`
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`
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`
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`
`TOONOTIDAGE Plane TONTTITUDE
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`RAN Central User Par
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`Patent Application Publication
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`Jun . 6 , 2019 Sheet 1 of 13
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`PSTN
`108
`
`112 Other Networks
`
`
`
`106 / 107 / 109 Core Network
`
`Internet
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`FIG . 1A
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`115 / 116 / 117
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`- - - 122
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`102 -
`
`120
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`
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`Memory
`
`FIG . 1B
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`PSTN
`108
`
`110 Internet
`
`112
`
`Other Networks
`
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`
`146 MSC
`
`150 GGSN
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`148 SGSN
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`
`
`106 Core Network
`
`FIG . 1C
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`103 RAN
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`142b RNC
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`108 PSTN
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`110 Internet
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`112 Other Networks
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`FIG . 1D
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`104 RAN
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`108 PSTN
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`Internet
`
`186 AAA
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`184 MIP - HA
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`112 Other Networks
`
`188 Gateway
`
`
`
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`109
`
`105 RAN
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`$ 99999
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`FIG . 1E
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`R3
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`182 ASN
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`Patent Application Publication
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`Jun . 6 , 2019 Sheet 6 of 13
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`US 2019 / 0174554 A1
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`US 2019 / 0174554 A1
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`Jun . 6 , 2019 Sheet 10 of 13
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`Jun . 6 , 2019 Sheet 11 of 13
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`US 2019 / 0174554 A1
`
`Jun . 6 , 2019
`
`DISTRIBUTED CONTROL IN WIRELESS
`SYSTEMS
`CROSS - REFERENCE TO RELATED
`APPLICATIONS
`This application claims the benefit of U . S . Provi
`[ 0001 ]
`sional Patent Application No . 62 / 442 , 317 filed on Jan . 4 ,
`2017 ; U . S . Provisional Patent Application No . 62 / 416 , 499 ,
`filed on Nov . 2 , 2016 ; U . S . Provisional Patent Application
`No . 62 / 400 , 810 , filed on Sep . 28 , 2016 ; and U . S . Provisional
`Patent Application No . 62 / 334 , 704 , filed on May 11 , 2016 ,
`the contents of all of which being hereby incorporated by
`reference as if fully set - forth herein in their respective
`entirety , for all purposes .
`BACKGROUND
`[ 0002 ] Mobile communications continue to evolve . A fifth
`generation may be referred to as 5G . A previous ( legacy )
`generation of mobile communication may be , for example ,
`fourth generation ( 4G ) long term evolution ( LTE ) .
`
`SUMMARY
`[ 0003 ] Systems , procedures , and instrumentalities ( e . g . ,
`aspects of entities , interfaces and / or procedures in a wireless
`transmit / receive unit ( WTRU ) and / or network layers L1 , L2 ,
`13 ) are disclosed for distributed control in wireless systems ,
`such as 5G
`flexible radio access technology ( RAT )
`( 5gFLEX ) . Example procedures are provided for WTRU
`and network operation associated with a distributed control
`plane architecture , connectionless data transfer and / or dedi
`cated system information acquisition . Distributed control
`may be provided , for example , by replicating a plurality of
`access control functions ( ACFs ) using a plurality of
`instances in a plurality of different transmission / reception
`points ( TRPs ) with multi - connectivity . The plurality of
`TRPs may concurrently provide control services to
`a
`WTRU . Centralized control functions may manage core
`network connectivity and / or a plurality of user plane
`instances for the WTRU and / or may facilitate coordination
`between the plurality of ACF instances for the WTRU in the
`plurality of different TRPs of the WTRU ' s configuration .
`For example , there may be a first access plane between the
`WTRU and a first TRP that provides a first ACF for the
`WTRU , a second access plane between the WTRU and a
`second TRP that provides a second ACF for the WTRU , a
`RAN central control plane between the WTRU and a first
`RAN central control function ( RCCF ) and / or a RAN central
`user plane between the WTRU and a RAN central user
`function ( RCUF ) .
`[ 0004 ]
`A WTRU may use assistance information for
`beamformed system information delivery . Assistance infor
`mation may be determined and / or transmitted .
`[ 0005 ]
`A WTRU may determine when to apply and / or
`activate on - demand system information . A WTRU may
`determine when to delete and / or deactivate on - demand
`system information .
`[ 0006 ]
`A WTRU may have saved instructions in memory
`executable by a processor and / or received from a wireless
`network via a message ( e . g . , rules ) for triggering a system
`information ( “ SI ” ) request procedure . A WTRU may also
`have saved instructions in memory executable by a proces -
`sor and / or received from a wireless network via a message
`
`for performing an SI request , ( e . g . , using a random access
`channel “ RACH ” ) , and / or msg3 and / or handling of net
`works .
`A wireless transmit / receive unit ( WTRU ) may be
`0007 ]
`in communication with a communication network . The
`WTRU may comprise a memory . The WTRU may comprise
`a processor . The processor may be configured to determine
`to request one or more system information ( SI ) messages
`from the communication network . The processor may be
`configured to determine if a transmission of the one or more
`SI message from the communication network will utilize at
`least one beamformed communication based on one or more
`communication parameters . The WTRU may comprise a
`transceiver . The transceiver may be configured to receive at
`least one of the one or more SI messages from the commu
`nication network via the at least one beamformed commu
`nication .
`A wireless transmit / receive unit ( WTRU ) may be
`[ 0008 ]
`in communication with a communication network . The
`WTRU may comprise a memory . The WTRU may comprise
`a processor . The processor may be configured to determine
`to request one or more system information ( SI ) messages
`from the communication network . The processor may be
`configured to conduct a beam sweep operation of one or
`more downlink ( DL ) beams transmitted from the commu
`nication network . The processor may be configured to
`identify at least one DL beam of the one or more DL beams
`via which to receive the one or more on - demand SI mes
`sages based at least in part on the beam sweep operation . The
`processor may be configured to determine one or more
`uplink ( UL ) resources with which to communicate informa
`tion for the WTRU reception of the one or more on - demand
`SI messages . The information for the WTRU reception may
`include the at least one DL beam . The processor may be
`configured to initiate the request for the one or more
`on - demand SI messages from the communication network .
`The WTRU may comprise a transceiver . The transceiver
`may be configured to send the request for the one or more
`on - demand SI messages to the communication network
`using the one or more UL resources . The request may
`include the information for the WTRU reception of the one
`or more on - demand SI messages . The transceiver may be
`configured to receive at least one of the one or more
`on - demand SI messages from the communication network
`via the at least one DL beam .
`[ 0009 ]
`A wireless transmit / receive unit ( WTRU ) may be
`in communication with a communication network . The
`WTRU may comprise a memory . The WTRU may comprise
`a transceiver . The transceiver may be configured to receive
`system information ( SI ) from the communication network at
`a first - time instance . The WTRU may comprise a processor .
`The processor may be configured to determine a first
`reference identifier ( ID ) that corresponds to at least some of
`the SI of the first - time instance . The processor may be
`configured to determine a first - value identifier ( ID ) that
`corresponds to the at least some of the SI of the first - time
`instance . The processor may be configured to associate the
`first - reference ID and / or the first - value ID with the at least
`some of the SI of the first - time instance . The processor may
`be configured to utilize the at least some of the SI of the
`first - time instance in communication with the communica
`tion network . The processor may be configured to search the
`memory for stored SI of a previous - time instance that is
`associated with the same first - reference ID of the at least
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`Jun . 6 , 2019
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`some of the SI of the first - time instance . The processor may
`be configured to store the at least some of the SI of the
`first - time instance upon no stored SI of the previous - time
`instance associated with the same first - reference ID being
`found . The processor may be configured to replace stored SI
`of the previous - time instance associated with the same
`first - reference ID with the at least some of the SI of the
`first - time instance upon a value ID associated with the stored
`SI of the previous - time instance associated with the same
`first - reference ID being different from the first - value ID .
`[ 0010 ]
`A wireless transmit / receive unit ( WTRU ) may be
`in communication with a communication network . The
`WTRU may comprise a memory . The WTRU may comprise
`a processor . The processor may be configured to determine
`to request other system information ( other - SI ) from the
`communication network . The WTRU may be configured to
`initiate the request for the other - SI from the communication
`network as part of a Random Access Channel ( RACH )
`procedure . The WTRU may comprise a transceiver . The
`transceiver may be configured to transmit a RACH signal .
`The RACH signal may include the request for the other - SI
`in a random access preamble of the RACH signal . The
`processor may be configured to monitor for a message that
`includes a minimum SI from the communication network for
`a predetermined period of time following the transmission of
`the RACH signal . The processor may be configured to
`determine if the requested other - SI is included in the mes
`sage that includes the minimum SI upon a detection of the
`message that includes the minimum SI . The processor may
`initiate one or more retransmissions of the RACH signal the
`message that includes the minimum SI not being detected ,
`and / or the other - SI is determined to not be included in a
`detected message that includes the minimum SI .
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`[ 0011 ] FIG . 1A is a system diagram of an example com
`munications system in which one or more disclosed embodi
`ments may be implemented .
`[ 0012 ]
`FIG . 1B is a system diagram of an example WTRU
`that may be used within the communications system illus
`trated in FIG . 1A .
`[ 0013 ] FIG . 1C is a system diagram of an example radio
`access network and an example core network that may be
`used within the communications system illustrated in FIG .
`1A .
`[ 0014 ] FIG . 1D is a system diagram of another example
`radio access network and another example core network that
`may be used within the communications system illustrated
`in FIG . 1A .
`[ 0015 ) FIG . 1E is a system diagram of another example
`radio access network and another example core network that
`may be used within the communications system illustrated
`in FIG . 1A .
`[ 0016 ]
`FIG . 2 is an example of transmission bandwidths .
`[ 0017
`FIG . 3 is an example of flexible spectrum alloca
`tion .
`[ 0018 ] FIG . 4 is an example of types of assistance modes .
`[ 0019 ] FIG . 5 is an example of tri - plane architecture .
`[ 0020 ]
`FIG . 6 is an example of non - overlapping windows
`for minimum - system information ( SI ) and other - SI .
`[ 0021 ] FIG . 7 is an example of overlapping windows for
`other - SI and minimum - Sl .
`[ 0022 ] FIGS . 8A and 8B together illustrate an example of
`an on - demand SI request in a beamformed context .
`
`DETAILED DESCRIPTION
`A detailed description of illustrative embodiments
`[ 0023 ]
`will now be described with reference to the various Figures .
`Although this description provides a detailed example of
`possible implementations , it should be noted that the details
`are intended to be examples and in no way limit the scope
`of the application .
`[ 0024 ]
`FIG . 1A is a diagram of an example communica
`tions system 100 in which one or more disclosed embodi
`ments may be implemented . The communications system
`100 may be a multiple access system that provides content ,
`such as voice , data , video , messaging , broadcast , etc . , to
`multiple wireless users . The communications system 100
`may enable multiple wireless users to access such content
`through the sharing of system resources , including wireless
`bandwidth . For example , the communications system 100
`may employ one or more channel access methods , such as
`code division multiple access ( CDMA ) , time division mul
`tiple access ( TDMA ) , frequency division multiple access
`( FDMA ) , orthogonal FDMA ( OFDMA ) , single - carrier
`FDMA ( SC - FDMA ) , and the like .
`[ 0025 ] As shown in FIG . 1A , the communications system
`100 may include wireless transmit / receive units ( WTRUS ) ,
`e . g . , WTRUS , 102a , 102b , 102c , and / or 102d ( which gen
`erally or collectively may be referred to as WTRU 102 ) , a
`radio access network ( RAN ) 103 / 104 / 105 , a core network
`106 / 107 / 109 , a public switched telephone network ( PSTN )
`108 , the Internet 110 , and other networks 112 , though it will
`be appreciated that the disclosed embodiments contemplate
`any number of WTRUs , base stations , networks , and / or
`network elements . Each of the WTRUS 102a , 102b , 102c ,
`102d may be any type of device configured to operate and / or
`communicate in
`a wireless environment . By way of
`example , the WTRUS 102a , 102b , 102c , 102d may be
`configured to transmit and / or receive wireless signals and
`may include user equipment ( UE ) , a mobile station , a fixed
`or mobile subscriber unit , a pager , a cellular telephone , a
`personal digital assistant ( PDA ) , a smartphone , a laptop , a
`netbook , a personal computer , a wireless sensor , consumer
`electronics , and the like .
`( 0026 ]
`The communications system 100 may also include
`a base station 114a and a base station 114b . Each of the base
`stations 114a , 114b may be any type of device configured to
`wirelessly interface with at least one of the WTRUS 102a ,
`102b , 102c , 102d to facilitate access to one or more com
`munication networks , such as the core network 106 / 107 / 109 ,
`the Internet 110 , and / or the networks 112 . By way of
`example , the base stations 114a , 114b may be a base
`transceiver station ( BTS ) , a Node - B , an eNode B , a Home
`Node B , a Home eNode B , a site controller , an access point
`( AP ) , a wireless router , and the like . While the base stations
`114a , 114b are each depicted as a single element , it will be
`appreciated that the base stations 114a , 114b may include
`any number of interconnected base stations and / or network
`elements .
`[ 0027 ]
`The base station 114a may be part of the RAN
`103 / 104 / 105 , which may also include other base stations
`and / or network elements ( not shown ) , such as a base station
`controller ( BSC ) , a radio network controller ( RNC ) , relay
`nodes , etc . The base station 114a and / or the base station
`114b may be configured to transmit and / or receive wireless
`signals within a particular geographic region , which may be
`referred to as a cell ( not shown ) . The cell may further be
`divided into cell sectors . For example , the cell associated
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`with the base station 114a may be divided into three sectors .
`Thus , in some embodiments , the base station 114a may
`include three transceivers , e . g . , one for each sector of the
`cell . In another embodiment , the base station 114a may
`employ multiple - input multiple output ( MIMO ) technology
`and , therefore , may utilize multiple transceivers for each
`sector of the cell .
`[ 0028 ] The base stations 114a . 114b may communicate
`with one or more of the WTRUS 102a , 1021 , 102c , 102d
`over an air interface 115 / 116 / 117 , which may be any suitable
`wireless communication link ( e . g . , radio frequency ( RF ) ,
`microwave , infrared ( IR ) , ultraviolet ( UV ) , visible light ,
`etc . ) . The air interface 115 / 116 / 117 may be established using
`any suitable radio access technology ( RAT ) .
`[ 0029 ] More specifically , as noted above , the communi
`cations system 100 may be a multiple access system and
`may employ one or more channel access schemes , such as
`CDMA , TDMA , FDMA , OFDMA , SC - FDMA , and the like .
`For example , the base station 114a in the RAN 103 / 104 / 105
`and the WTRUs 102a . 102b , 102c may implement a radio
`technology such as Universal Mobile Telecommunications
`System ( UMTS ) Terrestrial Radio Access ( UTRA ) , which
`may establish the air interface 115 / 116 / 117 using wideband
`CDMA ( WCDMA ) . WCDMA may include communication
`protocols such as High - Speed Packet Access ( HSPA ) and / or
`Evolved HSPA ( HSPA + ) . HSPA may include High - Speed
`Downlink Packet Access ( HSDPA ) and / or High - Speed
`Uplink Packet Access ( HSUPA ) .
`[ 0030 ]
`In another embodiment , the base station 114a and
`the WTRUS 102a , 102b , 102c may implement a radio
`technology such as Evolved UMTS Terrestrial Radio Access
`( E - UTRA ) , which may establish the air interface 115 / 116 /
`117 using Long Term Evolution ( LTE ) and / or LTE - Ad
`vanced ( LTE - A ) .
`[ 0031 ]
`In other embodiments , the base station 114a and
`the WTRUS 102a , 102b , 102c may implement radio tech
`nologies such as IEEE 802 . 16 ( e . g . , Worldwide Interoper
`ability for Microwave Access ( WiMAX ) ) , CDMA2000 ,
`CDMA2000 IX , CDMA2000 EV - DO , Interim Standard
`2000 ( IS - 2000 ) , Interim Standard 95 ( IS - 95 ) , Interim Stan
`dard 856 ( IS - 856 ) , Global System for Mobile communica
`tions ( GSM ) , Enhanced Data rates for GSM Evolution
`( EDGE ) , GSM EDGE ( GERAN ) , and the like .
`[ 0032 ] The base station 114b in FIG . 1A may be a wireless
`router , Home Node B , Home eNode B , or access point , for
`example , and may utilize any suitable RAT for facilitating
`wireless connectivity in a localized area , such as a place of
`business , a home , a vehicle , a campus , and the like . In some
`embodiments , the base station 114b and the WTRUS 102c ,
`102d may implement a radio technology such as IEEE
`802 . 11 to establish a wireless local area network ( WLAN ) .
`In another embodiment , the base station 114b and the
`WTRUS 102c , 102d may implement a radio technology such
`as IEEE 802 . 15 to establish a wireless personal area network
`( WPAN ) . In yet another embodiment , the base station 114b
`and the WTRUS 102c , 102d may utilize a cellular - based
`RAT ( e . g . , WCDMA , CDMA2000 , GSM , LTE , LTE - A , etc . )
`to establish a picocell or femtocell . As shown in FIG . 1A , the
`base station 114b may have a direct connection to the
`Internet 110 . Thus , the base station 114b may not be required
`to access the Internet 110 via the core network 106 / 107 / 109 .
`[ 0033 ] The RAN 103 / 104 / 105 may be in communication
`with the core network 106 / 107 / 109 , which may be any type
`of network configured to provide voice , data , applications ,
`
`and / or voice over internet protocol ( VoIP ) services to one or
`more of the WTRUS 102a . 102b , 102c , 102d . For example ,
`the core network 106 / 107 / 109 may provide call control ,
`billing services , mobile location - based services , pre - paid
`calling , Internet connectivity , video distribution , etc . , and / or
`perform high - level security functions , such as user authen
`tication . Although not shown in FIG . 1A , it will be appre
`ciated that the RAN 103 / 104 / 105 and / or the core network
`106 / 107 / 109 may be in direct or indirect communication
`with other RANs that employ the same RAT as the RAN
`103 / 104 / 105 or a different RAT . For example , in addition to
`being connected to the RAN 103 / 104 / 105 , which may be
`utilizing an E - UTRA radio technology , the core network
`106 / 107 / 109 may also be in communication with another
`RAN ( not shown ) employing a GSM radio technology .
`[ 0034 ] The core network 106 / 107 / 109 may also serve as a
`gateway for the WTRUS 102a , 102b , 102c , 102d to access
`the PSTN 108 , the Internet 110 , and / or other networks 112 .
`The PSTN 108 may include circuit - switched telephone
`networks that provide plain old telephone service ( POTS ) .
`The Internet 110 may include a global system of intercon
`nected computer networks and devices that use common
`communication protocols , such as the transmission control
`protocol ( TCP ) , user datagram protocol ( UDP ) and the
`internet protocol ( IP ) in the TCP / IP internet protocol suite .
`The networks 112 may include wired or wireless commu
`nications networks owned and / or operated by other service
`providers . For example , the networks 112 may include
`another core network connected to one or more RANS ,
`which may employ the same RAT as the RAN 103 / 104 / 105
`or a different RAT .
`10035 ] Some or all of the WTRUS 102a , 102b . 102c , 102d
`in the communications system 100 may include multi - mode
`capabilities , e . g . , the WTRUS 102a , 102b , 102c , 102d may
`include multiple transceivers for communicating with dif
`