Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 1 of 41 PageID #: 1356
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 1of 41 PagelD#: 1356
`
`
`
`
`
`EXHIBIT 8
`EXHIBIT 8
`
`
`

`

`(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2011/0243016 A1
`ZHANG et al.
`(43) Pub. Date:
`Oct. 6, 2011
`
`US 20110243016A1
`
`(54) METHOD FOR PERFORMING POWER
`HEADROOM REPORTING PROCEDURE AND
`PHR MAC CONTROL ELEMENT
`
`(76) Inventors:
`
`Yuanyuan ZHANG, (US);
`Tsung-Liang Lu, (U S)
`
`(21) App1.No.:
`
`13/080,243
`
`(22) Filed:
`
`Apr. 5, 2011
`
`Related US. Application Data
`
`(60) Provisional application No. 61/282,813, ?led on Apr.
`6, 2010, provisional application No. 61/344,237, ?led
`on Jun. 17, 2010, provisional application No. 61/410,
`655, ?led on Nov. 5,2010.
`
`Publication Classi?cation
`
`(51) Int CL
`(200601)
`H04L 12/26
`(2009.01)
`H04W 72/04
`(52) US. Cl. ....................................... .. 370/252; 370/329
`(57)
`ABSTRACT
`
`This invention relates to a method for performing PoWer
`Headroom reporting procedure, adapted for a user equip
`ment, Wherein the user equipment is operated in a plurality of
`activated serving cells, the method includes the steps of:
`providing a prohibitPHR-Timer; obtaining a plurality of
`doWnlink path loss values respectively corresponding to the
`activated serving cells; triggering a poWer headroom report
`When the prohibitPHR-Timer expires or has expired and at
`least one of the doWnlink path loss values has changed more
`than a PathlossChange threshold since the last transmission
`of a PHR; and reporting the poWer headroom report.
`
`S310
`
`/\ S320
`
`provide prohibitPHR
`Timer
`i
`con?gure activated
`serving cells
`
`prohibitPHR-Timer
`expires or has expired and
`APL of any serving cells >
`PathlossChange
`Threshold w S350
`
`trigger PHR
`far all serving cells _/-\ S3 60
`1
`report PHR
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 2 of 41 PageID #: 1357
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 1 0f 22
`
`US 2011/0243016 A1
`
`rohibitPHR-Timer
`expires or has expired and
`APL > dl-PathlossChange dB
`
`periodicPHR-Timer expires
`
`trigger PHR —
`
`Con?guration
`or recon?guration of the
`PHR functionality, Which is not
`used to disable the
`?lnction
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 3 of 41 PageID #: 1358
`
`FIG. 1 (Prior Art)
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 2 of 22
`
`US 2011/0243016 A1
`
`S204
`
`start
`periodlcPHR
`Timer
`
`N
`
`PHR has
`been triggered
`
`resgllfcgs
`enough ?
`
`S206
`Y obtain power
`headroom
`
`S207
`
`S208
`
`generate/transmit
`PHR MAC CE
`
`S210
`
`start _/ restart
`prohlbltPHR
`Timer
`
`S21 1
`\
`cancel all
`triggered PHR
`
`start / restart
`per1od1oPHR
`Timer
`\'-\
`S209
`
`END
`
`S212
`
`FIG. 2 (Prior Art)
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 4 of 41 PageID #: 1359
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 3 0f 22
`
`US 2011/0243016 A1
`
`(START)-/-\ S310
`
`provide prohibitPHR
`
`Timer
`
`A S320
`‘
`
`con?gure activated
`serving cells ‘A S330
`
`UE has UL
`resources ‘?
`
`S335
`
`prohibitPHR-Timer
`expires or has expired and
`APL of any serving cells >
`PathlossChange
`Threshold ‘A $350
`
`trigger PHR
`for all serving cells ~/-\ S360
`
`report PHR ~/-\ S370
`
`END
`
`S380
`
`FIG. 3
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 5 of 41 PageID #: 1360
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 4 0f 22
`
`US 2011/0243016 A1
`
`m S410
`
`S420
`
`rohibitPHR-Timer
`expires or has expired and
`APL of an y serving cells >
`PathlossChange
`Threshold
`
`Y
`
`S450
`
`S430
`
`\ trigger PHR
`
`_
`_
`_
`_
`periodicPHR-Tirner expires
`
`Y for all serving
`£214!
`
`-
`
`S440
`
`Con?guration
`or recon?guration of the
`PHR functionality, which is not
`used to disable the
`function
`
`Y
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 6 of 41 PageID #: 1361
`
`S460
`
`END
`
`FIG. 4
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 5 of 22
`
`US 2011/0243016 A1
`
`UE has UL
`resources ‘2
`
`prohibitPHR-Timer
`expires
`
`obtain previous PL
`values of serving cells‘h S510
`
`obtain PL values of
`servin cells ‘A S520
`
`calculate
`APL of serving cells ‘A S530
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 7 of 41 PageID #: 1362
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 6 of 22
`
`US 2011/0243016 A1
`
`S605
`
`UE has UL
`resource ‘.7
`
`S610
`
`S620
`
`' start
`perlodlcPHR
`Timer
`
`S635
`
`S640
`
`obtain power
`headrooms
`
`generate/transmit
`PHR MAC CE
`
`S650
`
`S655
`
`start / restart
`prohibitPHR
`Timer
`
`cancel all
`triggered PHR
`
`start/ restart
`p6I‘10d1CPHR
`Timer
`\_\
`S645
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 8 of 41 PageID #: 1363
`
`END
`
`S656
`
`FIG. 6
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 7 0f 22
`
`US 2011/0243016 A1
`
`5a 8 2%
`
`“FE :Emcmb MEL :EmENb
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`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 9 of 41 PageID #: 1364
`
`_
`
`_
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 8 0f 22
`
`US 2011/0243016 A1
`
`%
`
`1
`
`%
`
`i
`
`i
`
`l
`
`%
`
`Bitmap
`
`_/- 810
`
`R R
`
`R R
`
`R R
`
`PH
`
`PH
`
`PH
`
`FIG. 8
`
`~-/\ 820
`
`~/\ 830
`
`‘A 840
`
`_820_
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 10 of 41 PageID #: 1365
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 9 0f 22
`
`US 2011/0243016 A1
`
`I
`
`i
`
`1
`
`§
`
`1
`
`%
`
`Bitmap
`
`~/\ 910
`
`R R
`
`PH
`
`~"\ 920
`
`R R
`
`PCMAXC
`
`~/-\ 950
`
`R R
`
`PH
`
`‘A 930
`
`R R
`
`PCMAX’C
`
`~/\ 960
`
`R R
`
`PH
`
`~’\ 940
`
`R R
`
`PCMAX,c
`
`_/\ 970
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 11 of 41 PageID #: 1366
`
`iqg
`
`FIG. 9
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 10 0f 22
`
`US 2011/0243016 A1
`
`I
`I
`
`I
`I
`
`I
`I
`
`I
`I
`
`I
`I
`
`I
`I
`
`I
`I
`
`Bitmap
`
`“A 1010
`
`1025 \_/\~
`R 0
`
`PH
`
`~~ 1020
`
`R R
`
`PCMAX,c
`
`__,\ 1050
`
`1035 ~/\
`R 1
`
`1045 \_/\~
`R 0
`
`PH
`
`PH
`
`VA 1030
`
`_/\ 1040
`
`R R
`
`PCMAX,c
`
`~/\ 1070
`
`1000
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 12 of 41 PageID #: 1367
`
`FIG. 10
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 11 0f 22
`
`US 2011/0243016 A1
`
`@ S1110
`
`1120
`
`rohibitPHR-Timer
`expires or has expired and
`APL 01 PCell >
`PathlossChange
`Threshold
`
`S1150
`
`trigger PHR
`of PCe11
`
`—1
`
`1140
`
`Con?guration
`or recon?guration of the
`PHR ?inctionality, which is not
`used to disable the
`function
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 13 of 41 PageID #: 1368
`
`S1160
`
`END
`
`FIG. 11
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 12 0f 22
`
`US 2011/0243016 A1
`
`UE has UL
`resources ‘?
`
`prohibitPHR-Timer
`expires
`
`Y
`obtain previous
`PL Value of PCell ‘A S1210
`
`obtain PL value of
`PCell
`
`‘AS1220
`
`calculate A S1230
`APL of PCeIl
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 14 of 41 PageID #: 1369
`
`FIG. 12
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 13 of 22
`
`US 2011/0243016 A1
`
`S 13 05
`
`UE has UL
`resource ‘.7
`
`$1310
`
`1 320
`
`_ start
`perlodlcPHR
`Timer
`
`for PCell is
`triggered
`
`L resource
`enough 7
`
`S 13 5 0
`
`1 3 3 0
`
`1 3 3 5
`
`obtain type 1
`and type 2 PH
`
`1 340
`generate/transmit PHR MAC
`CE incldin t e 1 and t e 2 PH
`g YP
`YP
`
`S 1 3 5 5
`
`start / restart
`prohibitPHR
`Timer
`
`_ cancel all
`trlggered PHR
`
`start / restart
`perlodlcPHR
`Tlmer
`\.\
`S 1 345
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 15 of 41 PageID #: 1370
`
`END
`
`S1356
`
`FIG. 13
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 14 0f 22
`
`US 2011/0243016 A1
`
`i
`
`i
`
`i
`
`i
`
`l
`
`i
`
`i
`
`Bitmap
`
`~/\ 1410
`
`R R
`
`PH (Type 2)
`
`~»\ 1420
`
`R R
`
`PH (Type 1)
`
`~/\ 1430
`
`E99
`
`FIG. 14
`
`k
`
`k
`
`I
`
`E
`
`i
`
`R R
`
`PH (Type 2)
`
`~/—\ 1520
`
`R R
`
`PH(Type 1)
`
`~/\ 1530
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 16 of 41 PageID #: 1371
`
`129
`
`FIG. 15
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 15 0f 22
`
`US 2011/0243016 A1
`
`1
`
`l
`
`l
`
`l
`
`1
`
`1
`
`1
`
`Bitmap
`
`~/\ 1610
`
`R R
`
`PH (Type 2)
`
`~»\ 1620
`
`R R
`
`PCMAX,c 1
`
`~/\ 1640
`
`R R
`
`1
`
`PH (Type 1)
`
`~/\ 1630
`
`R R
`
`PCMAX» 2
`
`~/\ 1650
`
`1&0
`
`FIG. 16
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 17 of 41 PageID #: 1372
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 16 0f 22
`
`US 2011/0243016 A1
`
`1
`
`1
`
`1
`
`1
`
`1
`
`1
`
`1
`
`Bitmap
`
`~/\ 1710
`
`1725 \/R\ 0
`
`PH (Type 2)
`
`‘A 1720
`
`R R
`
`PCMAXSI
`
`‘A1740
`
`1735 “/R\ 1
`
`PH (Type 1)
`
`-/\1730
`
`_1_7_0_9
`
`FIG. 17
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 18 of 41 PageID #: 1373
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 17 0f 22
`
`US 2011/0243016 A1
`
`@ S1810
`
`1 820
`
`rohibitPHR-Timer
`expires or has expired and
`APL of activated serving cells >
`PathlossChange
`Threshold
`
`Y
`
`N
`
`1830
`
`.
`.
`.
`.
`periodicPHR-Timer expires
`
`S 1 85 O\’\
`trigger PHR for
`t' t a’
`' g
`ac Iva 6 saw” _
`Q41
`
`Y
`
`N
`
`.
`
`1840
`
`Con?guratlon
`or recon?guration of the
`PHR functionality, which is not
`used to disable the
`function
`
`Y
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 19 of 41 PageID #: 1374
`
`S1860
`
`END
`
`FIG. 18
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 18 0f 22
`
`US 2011/0243016 A1
`
`UE has UL
`resources ?
`
`prohibitPHR-Tirner
`expires
`
`Y
`obtain previous PL values
`of activated serving cells *5‘ 51910
`
`obtain PL values of
`activated serving cells‘? S1920
`
`calculate APL of
`activated serving cells‘? S193 0
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 20 of 41 PageID #: 1375
`
`PL > PathlossChange
`threshold
`
`

`

`Patent Application Publication
`
`Oct. 6, 2011 Sheet 19 0f 22
`
`US 2011/0243016 A1
`
`UE has UL
`resource ‘?
`
`2020
`
`. start
`periodlcPHR
`Timer‘
`
`2035
`
`obtain power
`headrooms
`
`2040
`generate/transmit PHR MAC
`CE incldin
`e l and t
`e 2 PH
`8 WP
`YP
`
`S205 0
`
`start _/ restart
`prohlbltPHR
`Timer
`
`S2055
`\"
`cancel all
`triggered PHR
`
`start / restart
`perlodlcPHR
`Timer
`\"\
`S2045
`
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 21 of 41 PageID #: 1376
`
`END
`
`S2056
`
`FIG. 20
`
`

`

`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 22 of 41 PageID #: 1377
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 22 of 41 PagelD #: 1377
`
`Patent Application Publication
`
`Oct. 6, 2011 Sheet 20 of 22
`
`US 2011/0243016 Al
`
`
`
`Sciecan
`
`
`
`
`
`
`
` 2160
`
`
`
`
`PH (Type 1, SCell)
`
`2100
`
`FIG, 21
`
`

`

`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 23 of 41 PageID #: 1378
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 23 of 41 PagelD #: 1378
`
`Patent Application Publication
`
`Oct. 6, 2011 Sheet 21 of 22
`
`US 2011/0243016 Al
`
`C7|C6
`2210
`
`HHH
`
`
`
`elalelefal=
`
`alele|e
`
`
`ieial=lale|e|s=l=[ie|elee
`
`
`
`
`
`
`
`2220
`
`2221
`
`2230
`
`2231
`
`2240
`
`2271
`
`2250
`
`2272
`
`2260
`
`2273
`
`pa[ele
`
`Pomaxe
`
`(SCell)
`
`PH (Type 1, SCell)
`
`Pomaxe
`
`(SCell)
`
`2200
`
`FIG, 22
`
`

`

`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 24 of 41 PageID #: 1379
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 24 of 41 PagelD #: 1379
`
`Patent Application Publication
`
`Oct. 6, 2011 Sheet 22 of 22
`
`US 2011/0243016 Al
`
`be
`
`od
`Py
`
`2335
`
`2345 +
`
`R
`
`Pomax.e
`
`(SCell)
`
`2365 ~_—
`
`
`
`+_—™
`
`
`
`PH (Type 1, SCell)
`
`
`
`2300
`
`FIG, 23
`
`rer|os[es|oa}ea)jer|R
`
`
`
`nin PH(Type2,PCell)
`
`
`
`
`aaRR]Powel
`2330
`aaj
`PH(Type1, PCell)
`
`R fo PH(Type 1, SCell)
`2340
`
`
`2325
`
`
`
`2355
`
`2320
`
`2321
`
`2371
`
`2350
`
`

`

`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 25 of 41 PageID #: 1380
`Case 6:14-cv-00982-KNM Document 147-8 Filed 11/09/15 Page 25 of 41 PagelD #: 1380
`
`US 2011/0243016 Al
`
`Oct. 6, 2011
`
`METHOD FOR PERFORMING POWER
`HEADROOM REPORTING PROCEDURE AND
`PHR MAC CONTROL ELEMENT
`
`[0001] This application claims the benefit of U.S. Provi-
`sional Application No. 61/282813 filed on Apr. 6, 2010, U.S.
`Provisional Application No. 61/344237filed on Jun. 17, 2010
`and U.S. Provisional Application No. 61/410655 filed on
`Nov.5, 2010, the content of which is hereby incorporated by
`reference.
`
`BACKGROUND OF THE INVENTION
`
`[0011] A possible implementation example of the above
`described PHR triggering mechanism in the 3GPP protocol
`specificationsis illustrated in FIG. 1. FIG. 1 is a flowchart of
`aconventional PHRtriggering method according to the 3GPP
`specifications. However, the triggered PHR is only for one
`componentcarrier.
`[0012]
`Inthe 3GPP protocolspecifications, it is also read a
`Power headroom reporting procedure to enable the UE to
`transmit the PHR to the network side. FIG. 2 illustrates a
`
`flowchart of a conventional Power headroom reporting
`method according to the 3GPPspecifications. Referring to
`FIG.2, the method includes the following steps.
`[0013]
`Instep S201, the methodfor reporting a PHRstarts.
`[0014]
`In step S202, it is determined whether the UE has
`1. Field of Invention
`[0002]
`uplink (UL) resources allocated for a new transmissionfor the
`[0003] The present invention relates in general to a Power
`present Transmission Time Interval (TTI).
`Headroom reporting mechanism, and more particularly to a
`[0015]
`In step S203, it is determined whetherit is the first
`Power Headroom reporting mechanism for radio resources
`uplink (UL) resource for the new transmission since the last
`allocation in a wireless communication system.
`Medium Access Control (MAC)reset.
`[0004]
`2. Related Art
`[0016]
`In step S204, a periodicPHR-Timeris started.
`[0005]
`In a wireless communication system, how to effi-
`[0017]
`In step S205, it is determined whether the PHR has
`ciently distribute/allocate uplink transmission resources
`been triggeredsince the last transmission ofa PHRor whether
`between multiple user equipments (UEs)is alwaysacritical
`it is the first time that a PHRis triggered.
`issue from the system point ofview.In order to achieve better
`[0018]
`In step S206,it is determined whetherthe allocated
`radio resource management, some mechanismswhichis used
`uplink (UL) resources can accommodate a PHR MAC control
`for enabling UEsto provide related information and inform-
`elementplusits sub-headerafter the logical channelprioriti-
`ing the network side of some UE-specific power status, are
`zation.
`usually introduced in the wireless communication system.
`In step S207, the value of the power headroom is
`[0019]
`For example, procedures called Power Headroom reporting
`obtained from the physical layer.
`are introduced in the 3rd Generation Partnership Project
`[0020]
`In step S208, the multiplexing and assembly proce-
`(3GPP) Universal Terrestrial Radio Access (UTRA) system
`dure are instructed to generate and transmit a PHR MAC
`and Evolved UTRA (E-UTRA)system. Also a mechanism
`control element based on the value reported by the physical
`called Power Status Reporting is introduced in IEEE 802.
`layer.
`16m.
`[0021]
`restarted.
`
`[0006] Taking the Power Headroom reporting procedure in
`3GPP E-UTRA for example, the Power Headroom is the
`difference between the nominal UE maximum transmit
`
`powerandthe estimated power for UpLink-Shared Channel
`(UL-SCH) transmission. And the reporting procedure is
`introducedto report the difference to the network side, so that
`the network entity (eNB) can perform radio resource man-
`agementin an appropriate way. This is especially important
`when allocating the transmission format (bandwidth and
`modulation and coding scheme) to different UEs. The net-
`work entity (eNB) can use the Power Headroom value to
`determine how much more uplink bandwidth per subframe
`which a UEis capable of using. This can help to avoid allo-
`cating uplink transmission resources to UEs which are unable
`to use them, thus a Signal to Interference-plus-Noise Ratio
`(SINR)is decreased and the system capacity may be wasted.
`[0007] The behavior ofthe Power Headroom reporting pro-
`cedure is defined in 3GPP protocol specifications. In the
`3GPP protocol specifications, a Power Headroom Report
`(PHR)shall betriggered if any of the following events occur:
`[0008]
`prohibitPHR-Timer expires or has expired and the
`path loss has changed more than dl-PathlossChange dB
`since the last transmission of a PHR when the UE has
`
`uplink resources for a new transmission, wherein only one
`componentcarrieris operated by the above-mentioned UE,
`and the above-mentioned path loss belongs to the compo-
`nent carrier of the UE.
`
`In step S209, the periodicPHR-Timeris started or
`
`[0022]
`restarted.
`
`In step S210, a prohibitPHR-Timeris started or
`
`In step $211, all triggered PHR(s)is/are cancelled.
`[0023]
`Instep S212, the methodfor reporting a PHR ends.
`[0024]
`[0025] The above PHRtriggering and reporting mecha-
`nisms are designedfor release 8 and release 9 (Rel-8/Rel-9)
`3GPP E-UTRA system, which is commonly known as 3GPP
`Long Term Evolution (LTE), but as new features are intro-
`duced in the future release system, which is commonly
`known as 3GPP LTE-Advanced, the PHR triggering and
`reporting mechanismsdefined in Rel-8/Rel-9 may beinsuf-
`ficient. For example, the UE may be configured with simul-
`taneous transmission of Physical Uplink Control CHannel
`(PUCCH)and Physical Uplink Shared CHannel (PUSCH)on
`the same carrier in LTE-Advanced, while no such simulta-
`neoustransmission is supported in Rel-8/Rel-9 E-UTRA sys-
`tem. Another newly introduced feature for LTE-Advancedis
`the Carrier Aggregation (CA). A UE with reception and/or
`transmission capabilities for CA can simultaneously receive
`and/or transmit on multiple component carriers (CC) corre-
`sponding to multiple serving cells. The introductionoftrans-
`mission on multiple componentcarriers may also bring the
`need of new PHR mechanism.
`
`SUMMARY OF THE INVENTION
`
`periodicPHR-Timerexpires; and
`[0009]
`[0026] It is thereforeafirst objective of the present inven-
`
`[0010]
`upon configuration or reconfiguration of the power
`tion to provide a method for performing Power Headroom
`headroom reporting functionality by upper layers, which is
`reporting procedure, so that the eNB can completely obtain
`not usedto disable the function.
`the information of PHRfor activated serving cells.
`
`

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`trol elementis used for reporting the type 1 power headroom
`It is therefore a second objective of the present
`[0027]
`level and the type 2 power headroom level to a network node.
`invention to provide a method for performing Power Head-
`[0033]
`In order to achieve the abovementioned fourth
`room reporting procedure, so that a type 1 power headroom
`object of the present invention and other object of the present
`and a type 2 power headroom will be reported when simulta-
`invention, a power headroom report media access control-
`neous transmission of the Physical Uplink Control CHannel
`control element is provided in the present invention. The
`(PUCCH)and Physical Uplink Shared CHannel (PUSCH)is
`powerheadroom report media access control-control element
`configured.
`comprises a Ci field anda plurality ofpower headroomfields.
`[0028]
`It is therefore a third objective of the present inven-
`The Cifield is used for indicating whether each power head-
`tion to provide a PHR media access control (MAC)-control
`room field of its corresponding activated serving cell
`is
`element, so as to report a type 1 power headroom anda type
`reported. Each power headroomfield indicates a power head-
`2 power headroom.
`room level of the corresponding activated serving cells. The
`[0029]
`Itis therefore a fourth objective ofthe present inven-
`powerheadroom report media access control-control element
`is used for reporting each power headroom level of the cor-
`tion to provide a PHR MACcontrol element, so as to report
`responding activated serving cells to a network node.
`PHRfor multiple serving cells.
`[0034]
`Inthe present invention, since the PHRis triggered
`[0030]
`In order to achieve the abovementionedfirst object
`and reported for all activated serving cells, the complete
`of the present invention and other object ofthe present inven-
`information of PHR for serving cells can be obtained by the
`tion, a method for performing Power Headroom reporting
`eNB. When simultaneous transmission of Physical Uplink
`procedure is providedin the present invention, wherein a user
`Control CHannel (PUCCH) and Physical Uplink Shared
`equipmentis operated inaplurality of activated serving cells.
`CHannel (PUSCH)on the samecarrier is configured, the type
`The method comprisesthesteps of: providing a prohibitPHR-
`2 power headroom can bealso transmitted with the type 1
`Timer; determining whether the user equipment has uplink
`power headroom so that the eNB can correctly allocate the
`resources for new transmission; when the user equipmenthas
`resources to the user equipment accordingto the transmitted
`uplink resources for new transmission, the method further
`type 1 and type 2 PHRinformation.In the other respect ofthe
`comprising: triggering a power headroom report when the
`present invention, a PHR MACcontrol elementis provided to
`prohibitPHR-Timerexpires or has expired and atleast one of
`carry the PHR information to the eNB so that the eNB can
`a plurality of downlink path loss values has changed more
`adaptively allocate the resources to the user equipment and
`than a PathlossChangethreshold since the last transmission
`the communication quality is improved.
`of a previous power headroom report, wherein the downlink
`[0035]
`Further scope of the applicability of the present
`path loss values respectively corresponding to the serving
`invention will become apparentfrom the detailed description
`cells; and reporting the power headroom report.
`given hereinafter. However, it should be understood that the
`[0031]
`In order to achieve the abovementioned second
`detailed description and specific examples, while indicating
`object of the present invention and other object of the present
`preferred embodiments of the invention, are given by way of
`invention, a method for performing Power Headroom report-
`illustration only, since various changes and modifications
`ing procedure in a user equipment, wherein the user equip-
`within the spirit and scope of the invention will become
`ment
`is configured with simultaneous transmission of a
`apparentto those skilled in theart from this detailed descrip-
`physical uplink control channel and a physical uplink shared
`tion.
`channel, a power headroom report comprising a type 1 power
`headroom and a type 2 power headroom. The method com-
`prises the steps of determining whether the user equipment
`has uplink resources for new transmission; when the user
`equipmenthas uplink resources for new transmission, deter-
`mining whether the power headroom report has been trig-
`gered; and when the power headroom report has beentrig-
`gered, transmitting the type 1 power headroom andthe type 2
`powerheadroom together.
`[0032]
`Inorder to achieve the abovementioned third object
`of the present invention and other object ofthe present inven-
`tion, a power headroom report media access control-control
`element is provided in the present invention. The power head-
`room report media access control-control element comprises
`a type 2 power headroom field and a type 1 power headroom
`field. The type 2 power headroomfield is used for indicating
`a type 2 power headroom level, wherein the type 2 power
`headroom levelis obtained from a quantized value of a type 2
`power headroom, wherein the type 2 power headroom is
`determined by a physical uplink shared channel power and a
`physical uplink control channel power of the primary cell.
`The type 1 power headroomfield is used for indicating a type
`1 power headroom level wherein the type 1 power headroom
`level is obtained from a quantized value of a type 1 power
`headroom, wherein the type 1 power headroomis determined
`by the physical uplink shared channel powerof the primary
`cell. The power headroom report media access control-con-
`
`invention will become more fully
`[0036] The present
`understood from the detailed description given hereinbelow
`and the accompanying drawings which are given by way of
`illustration only, and thus are not limitative of the present
`invention.
`[0037]
`FIG.1 illustrates a flowchart of a conventional PHR
`triggering method according to the 3GPP specifications.
`[0038]
`FIG. 2 illustrates a flowchart of a conventional
`Power headroom reporting method according to the 3GPP
`specifications.
`[0039]
`FIG. 3 illustrates a flowchart of a method for per-
`forming Power Headroom reporting procedure according to
`an embodimentof the present invention.
`[0040]
`FIG. 4 illustrates a flowchart for triggering power
`headroom report (PHR) process according to an embodiment
`of the present invention.
`[0041]
`FIG. 5 illustrates a flowchart describing the sub-
`steps of the step S420 according to an embodiment of the
`present invention.
`[0042]
`FIG. 6 illustrates a flowchart for reporting PHR
`process according to an embodimentofthe present invention.
`[0043]
`FIG. 7 illustrates a timing chart describing the
`operation timing of the steps S410~S460 and S605~S656
`according to an embodimentofthe present invention.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`

`

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`Oct. 6, 2011
`
`FIG. 8 illustrates an implementation of a power
`[0044]
`headroom report media access control (PHR MAC)-control
`element according to an embodimentofthe present invention.
`[0045] FIG.9 illustrates an implementation of aPHR MAC
`control element according to an embodimentofthe present
`invention.
`
`FIG. 10 illustrates an implementation of a PHR
`[0046]
`MACcontrol element according to an embodiment of the
`present invention.
`[0047]
`FIG.11 illustrates a flowchart of the triggering PHR
`process according to an embodimentofthe present invention.
`[0048]
`FIG. 12 illustrates a flowchart describing the sub-
`steps of the step $1120 according to an embodiment of the
`present invention.
`[0049]
`FIG.13 illustrates a flowchart of the reporting PHR
`process according to an embodimentofthe present invention.
`[0050]
`FIG. 14 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0051]
`FIG. 15 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0052]
`FIG. 16 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0053]
`FIG. 17 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0054]
`FIG.18 illustrates a flowchart of the triggering PHR
`process according to an embodimentofthe present invention.
`[0055]
`FIG. 19 illustrates a flowchart describing the sub-
`steps of the step $1820 according to an embodiment of the
`present invention.
`[0056]
`FIG. 20 illustrates a flowchart of the reporting PHR
`process according to an embodimentofthe present invention.
`[0057]
`FIG. 21 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0058]
`FIG. 22 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`[0059]
`FIG. 23 illustrates an implementation of a PHR
`MACcontrol element according to an embodiment of the
`present invention.
`
`DETAILED DESCRIPTION OF THE INVENTION
`
`[0060] The present invention will be apparent from the
`following detailed description, which proceeds with refer-
`ence to the accompanying drawings, wherein the samerefer-
`encesrelate to the same elements.
`
`[0061] The conventional PHRtriggering and reporting pro-
`cedures are designed for a system which only supports single
`carrier deployment. But as the introduction of multi-carrier
`deploymenthas gradually becomethe trend offuture wireless
`communication design, the PHRtriggering/reporting for UEs
`supporting multi-carrier transmission would require further
`consideration. In this invention, different embodiments for
`possible scenarios are provided
`
`The First Embodiment
`
`In uplink transmission, a UE transmits a Power
`[0062]
`Headroom Report (PHR) to an E-UTRAN NodeB (eNB) in
`order to assist with uplink scheduling. The eNB uses the
`
`information of the PHR when it determines the amount of
`resources, proper modulation and coding scheme (MCS)
`level for physical uplink shared channel (PUSCH)transmis-
`sions. In the embodiment, the UE is operated in a multi-
`carrier system and performs transmission/reception in a plu-
`rality of activated serving cells. Thus, the eNB needs the
`information of the PHR of each activated serving cell.
`Besides,it is assumed that the UE is operated in 3GPP LTE-
`Advanced system.
`[0063]
`Please refer to FIG. 3 which illustrates a flowchart of
`a method for performing Power Headroom reporting proce-
`dure according to an embodimentofthe present invention. A
`method for performing Power Headroomreporting procedure
`comprises following steps.
`[0064]
`In step S310, the method for performing a Power
`Headroom reporting procedurestarts.
`[0065]
`In step $320, a prohibitPHR-Timeris provided.
`[0066]
`In step $330, a plurality of serving cells is config-
`ured. In multi-carrier system, the UE has multiple serving
`cells configured, but not all of serving cells can be operated by
`the UE and only a set of the configured serving cells are
`activated. In the embodiment,a plurality of activated serving
`cells is allocated to the UE.
`
`In step S335, it is determined whether the UE has
`[0067]
`uplink (UL) resource for new transmission.
`[0068]
`In step S350, it is determined whetherthe prohibit-
`PHR-Timer expires or expired andat least one of the down-
`link path loss values is changed (APL) morethan a Pathloss-
`Change threshold since the last transmission of the previous
`PHR.In the embodiment, every activated serving cell corre-
`sponds to one downlink path loss value, and a plurality of
`downlink path loss (PL) values correspondingto the activated
`serving cells can be obtained from a physical layer. Since
`downlink path loss relates to uplink path loss, downlink path
`loss values are used for a criterion of PHR triggering. In the
`step S350, each downlink path loss value is examined to
`determine the derivation thereofis larger than the Pathloss-
`Changethreshold.
`[0069]
`In step S360, the PHRis triggered, whenthe pro-
`hibitPHR-Timerexpires or has expired andat least one ofthe
`downlink path loss values has changed more than the Pathlo-
`ssChangethreshold sincethelast transmissionofthe previous
`PHR.In the embodiment, the PHR includes a plurality of
`power headrooms respectively corresponding to activated
`serving cells, thus, the triggered PHR is for all activated
`serving cells.
`[0070]
`In step S370, the PHR is reported with a granted
`uplink resources for new transmission.
`[0071]
`In step S380, the method for performing a Power
`Headroom reporting procedure ends.
`[0072] According to the abovementionedsteps, the PHR of
`each activated serving cell is triggered and reported so that the
`E-UTRAN NodeB(eNB)can obtain the complete PHRinfor-
`mation.
`
`The Second Embodiment
`
`Inthe embodiment, the UEis similarly operated in a
`[0073]
`multi-carrier system and performs transmission/reception in
`a plurality of activated serving cells. Besides, it is assumed
`that the UE is operated in 3GPP LTE-Advanced system. For
`conveniently describing the second embodiment, the method
`of performing Power Headroom reporting procedure is
`divided into a triggering PHR process and a reporting PHR
`process respectively illustrated in FIG. 4 and FIG.6. Please
`
`

`

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`US 2011/0243016 Al
`
`Oct. 6, 2011
`
`refer to FIG. 4 whichillustrates a flowchart ofthe triggering
`PHR process according to an embodiment of the present
`invention in advance. The triggering PHR process comprises
`following steps.
`[0074]
`In step S410, the process for triggering the PHR
`starts.
`
`In step S420, it is determined whether a prohibit-
`[0075]
`PHR-Timer expires or has expired and at least one of the
`downlink path loss values is changed (APL) more than a
`PathlossChange threshold since the last transmission of the
`previous PHR when the UE has uplink resources for new
`transmission. In the em