(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(19) World Intellectual Property Organization
`International Bureau
`
`(43) International Publication Date
`
`12 November 2009 (12.11.2009) (10) International Publication Number
`
`WO 2009/135848 A2
`
`(51) International Patent Classification: Not classified
`(21) International Application Number:
`
`(22) International Filing Date:
`
`(25) Fiiiiig Language
`
`PCT/EPZOO9/055430
`
`5 May 2009 (05.05.2009)
`.
`Engiisii
`
`(81) Designated States (unless otherwise indicated, for every
`[:31 gTnaZI0Jna:§r0]£::tlE’£a‘§léIa]])3II:): ’ SS,’
`‘:1?’
`CA, CH, CN, CO, CR, CU, Cz, DE, DK, DM, DO, DZ,
`EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN,
`HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR,
`KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME,
`MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO,
`
`(30) Priority Data:
`61/126,617
`
`5 May 2008 (05.05.2008)
`
`US
`
`(71) Appiicaiit UFO?” 9” designaled Slates excel” US)3 NOKIA
`SIEMENS NETWORKS OY [FI/FI]; Karaportti 3,
`F1-02610 Espoo (F1).
`Inventors; and
`Inventors/Applicants 0'or US only): KORHONEN,
`.
`.
`..
`.
`Juha [FI/FI], Keskiyontie 12 A 1, FI-02210 Espoo (FI).
`.
`.
`.
`.
`Jarl Olavl
`[FI/FI], Hallasuontie 87,
`LINDHOLM,
`FI-01940 Palojoki (FI).
`
`(72)
`(75)
`
`UG, Us, UZ: VC, V151, zA, ZM, zw 9
`
`i
`
`9
`
`9
`
`i
`
`(84) Designated States (unless otherwise indicated, for every
`kind of regional protection available): ARIPO (BW, GH,
`GM, KE, Ls, MW, Mz, NA, SD, SL, sz, TZ, UG, ZM,
`zw), Eurasian (AM, Az, BY, KG, KZ, MD, RU, TJ,
`TM) European (AT BE BG CH CY CZ DE DK EE
`’
`’
`’
`’
`’
`’
`’
`’
`’
`’
`ES» FL FR» GB» GR» HR» HU» IE» IS» H» LT» LU» LV»
`MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR),
`OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML,
`MR NE SN TD TG)
`’
`’
`’
`’
`
`'
`
`(74) Common Representative: NOKIA SIEMENS NET- P“""sh"d:
`WORKS OY; COO RTP IPR / Patent Administration,
`without international search report and to be republished
`upon receipt ofthat report (Rule 48.2(g))
`80240 Munich (DE).
`
`(54) Title: METHOD, APPARATUS AND COMPUTER PROGRAM FOR POWER CONTROL RELATED TO RANDOM AC-
`CESS PROCEDURES
`
`(57) Abstract: A first power control adjustment state g(i) and a second
`power control adjustment state f(i) are initialized for i=0 to each reflect
`an open loop power control error. An initial transmit power for a shared
`uplink channel is computed using full pathloss compensation. The com-
`puted initial transmit power depends on a preamble power of a first mes-
`sage sent on an access channel, and the initial transmit power is initial-
`ized with the second power control adjustment state f(0). A third message
`is sent from a transmitter on an uplink shared channel at the initial trans-
`mit power. In Various implementations, the power for i=0 on the uplink
`control channel is also initialized similar to the initial transmit power for
`the third message and using full pathloss compensation, and after the
`third message (and retransmissions of it), subsequent messages sent on
`the uplink shared channel are sent at a power that is computed using frac-
`tional pathloss compensation.
`
`I
`
`i
`302: estimate path less for communlcatlou with an eNB
`1
`304: compute a first power control value using a first power control technique (lull
`path loss oampensallon) according to the estimated path less (PL estimated from
`a received or transmission). a largetpower (1=,__,,ihroaaaasiin ma cell, and a
`ramp-up power value (AFMW)
`_!_
`
`
`
`306. send an a first channel 5 first message with power
`(Pm__m = I’,,,',, + PL + AFMM ), for ma preamble of that message)
`according to lhe computed first power control value (this ls an access
`request message sent on a RACH)
`
`
`
`11
`
`:
`see: she receives ma fit’S\ message and replies on a second
`channel (the DL—SCH/PDCCH) with a second message (Message
`2) that lnctudes an oplink resource allocation for the ue and a
`puwer control command (AFN ) fur the UE;
`
`1
`310: receive the second message and compute a second power ( Pwgm (0) ) uslniz a second
`power control lechnldue tlmclnonal power control) using the received power control command
`(APR ) and lnttializad wtih a function (sum) of the power control command [APE ) and the ramp-
`up power vaIue(APmw)
`Py(;;c(-{(0): D11DU’.,,,,(.lD|og,,(M,Nu,(0))+P(,_WMDw_J,,O‘ (j)+a-PL+ri,,(7F(D))+A.P,(. +A}'m_v_}
`
`t
`312: send data on a second channel (the PUSCH at the upllnk resource
`allocation) using the second power ( PWSCH (0))
`
`T
`3 l4: compute a third power (P1,,_,cm(0) ) that Is initlalized ldentlcally to the second
`power and send control infurrnalion to the eNB uslng that third power
`PPl'L‘CH (0) = mi“1P.vwrr PD_N0r.1mAl,juc(H + P1 + AWJUCCH (TF1 + AP»: + NL,
`
`Figure 3
`
`
`
`wo2009/135848A2|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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`Page 1 of 36
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`LG Electronics Exhibit 1014
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`Page 1 of 36
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`LG Electronics Exhibit 1014
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`

`
`VV()2009/135848
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`PCT/EP2009/055430
`
`DESCRIPTION
`
`TITLE
`
`5 MTHOD, APPARATUS AND COMUTER PROGRAM FOR POWER CONTROL
`
`RELATED TO RANDOM ACCESS PROCEDURES
`
`Technical Field:
`
`lO
`
`moon
`
`The exemplary and non—limiting embodiments of this
`
`invention relate generally to wireless communication systems,
`
`methods,
`
`devices and computer programs and, more
`
`specifically, relate to techniques
`
`for power control on
`
`di""erenL uplink messages sent
`
`from a communication device.
`
`15
`
`20
`
`3ackground:
`
`[0002]
`
`Various abbreviations that appear in the specification
`
`and/or in the drawing
`
`figures are defined as
`
`follows:
`
`3GPP
`
`DL
`
`DRX
`eN3
`
`third generation partnership project
`
`downlink
`
`discontinuous reception
`EUTRAN Node
`
`3 (evolved Node 3)
`
`25
`
`EUTRAN
`
`evolved UTRAV
`
`(also referred to as LTE)
`
`LTE
`
`AC
`
`ME
`
`long term evolution
`
`medium access control
`
`mobility management entity
`
`Wode 3
`
`base station
`
`30
`
`OFDMA
`
`orthogonal
`
`frequency division mu:
`
`_tiple access
`
`PC
`
`PDCC
`
`PDCP
`
`PDSC
`
`power control
`
`physical
`
`downlink control channel
`
`packet data
`
`convergence protocol
`
`physical
`
`downlink shared channel
`
`35
`
`P{Y
`
`physical
`
`PL
`
`PRAC
`
`PJSC
`
`path loss
`
`physical
`
`random access channel
`
`physical
`
`uplink shared channel
`
`Page 2 of 36
`
`Page 2 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`?ACi
`
`random access channel
`
`random access radio network temporary identifier
`
`radio link control
`
`radio resource control
`
`single carrier,
`
`frequency division multiple access
`
`timing advance
`
`user equipment
`
`uplink
`
`’%A—RN
`
`Tl
`
`RLC
`
`RRC
`
`SC—FD
`
`MA
`
`TA
`
`L*J
`
`L
`
`U U
`
`UTRAN
`
`universal
`
`terrestrial
`
`radio access network
`
`[0003]
`
`A proposed communication system known as evolved UTRAN
`
`(E-UT
`
`RAN,
`
`also re:
`
`ferred to as UTRAN-LTfi,
`
`%—UTRA or 3.9G)
`
`is
`
`Jrrently under development within the 3GPP.
`
`The current
`
`C w
`
`orking assumption is tha
`and the UL access
`
`OFDMA,
`
`: the DL access
`
`technique will be
`
`technique will be SC—FDMA.
`
`l0
`
`l5
`
`[0004]
`
`One speci
`
`"ica
`
`lion o
`
`interes-
`
`to these and other issues
`
`related to the invention is 3GPP TS 36.300,
`
`3rd Generation Par
`
`v8.4.0 (2008-03),
`Technical
`
`_ Specification
`
`tnership Project;
`
`20
`
`Group Radio Access Network; ?vo'ved Universa' Terrestrial
`
`Radio
`
`Acces
`
`Access
`
`(E—JT?A) and Evolved Universal Terrestrial
`
`s Network (E—JTRAN); Overall description; Stage 2
`
`(Rele
`
`ase 8).
`
`25
`
`[0005]
`
`shows
`
`Figure 1A reproduces Figure 4-1 of 3GPP TS 36.300, and
`
`the overall architecture of the E—UTRAW system.
`
`The
`
`E—UTRAW system includes eN3s,
`
`providing the
`
`E—UTRA user plane
`
`(PDCP
`
`/RLC/MAC/PHY)
`
`and con
`
`trol plane (
`L*J
`terminations towards the U2.
`
`QRC)
`
`protocol
`
`The eNI
`
`3s are interconnected
`
`30
`
`with
`
`each other by means of
`
`an X2 in
`
`terface.
`
`The eN3s are
`
`also
`
`speci
`0.- a
`
`means
`
`connected by means of
`u
`fically to a MM;
`
`an S1 interface
`
`to an
`
`3pc, more
`
`(Mobility
`
`Management
`
`Entity)
`
`by means
`
`S]-MM? inter
`
`face and to a Serving Ga"
`of a Sl—U interface.
`The
`
`:eway
`
`(S—GW) by
`
`S1 interface supports a
`
`35
`
`many—to—many rela
`eN3s.
`
`:ion between MMI
`
`is / Serving Gateways and
`
`Page3of36
`
`Page 3 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`mmm] Reference can also be made to 3GPP TS 36.321, V8.0.0
`
`(2007—l2), 3rd Generation Partnership Project; Technical
`
`Specification Group Radio Access Network; Evolved Universal
`
`Terrestrial Radio Access
`
`E-UTRA)
`
`Medium Access Control
`
`(MAC)
`
`protocol specification
`
`(Release 8).
`
`mmfl] Also of interest herein are the random access procedures
`
`Of the PTfi
`
`(fl-UTQA)
`
`system.
`
`These procedures are described
`
`in 3GPP TS 36.300 v.8.4.0 a
`
`section l0.l.5 (attached to the
`
`l0
`
`priority dociment as
`
`Exhibi
`
`A),
`
`shown at Figure 1? for the
`
`Contention 3ased Random Access Procedure and at Figure 1C for
`
`the Non—Contention
`
`3ased Random Access Procedure.
`
`These
`
`respectively reprod
`
`3GPP TS 36.300 v.8.4.0,
`
`JCS Figures l0.l.5.l—l and l0.l.5.l—2 of
`and Exhibit A of the priority
`
`l5
`
`20
`
`25
`
`30
`
`35
`
`document details the various steps shown.
`
`the U2
`'%riefly,
`[mma
`transmits a random access preamble and
`expects a response from the eN
`
`3 in the form of a so—called
`
`Message 2
`
`(e.g., Random Access Response at Figures 13 and
`':]fa1’]SF
`
`iitted on a DL shared channel DL—SCH
`
`1C). Message 2 is
`
`(PDSC ,
`
`the PDCCH)
`
`and a"oca
`
`tes resources on an UL—SCH
`
`(PJSC ).
`
`The resource a"
`
`'oca
`
`tion o" Message 2 is addressed
`
`with an identity RA—RNTI
`
`that is associated with the
`
`1
`
`frequency and time resources o:
`
`E a PRACH, but is common for
`
`di""eren, preamble sequences.
`
`The Message 2 contains UL
`
`al'ocations for the transmissions of a Message 3 in the UL
`3ased Random Access Procedure
`
`(e.g., step 3 of the Contention
`
`at Figure l3).
`
`mmm] RACH preambles are transmitted by the UEs Jsing a full
`formula.
`
`path—loss compensation PC
`
`The target is that
`
`reception RX level o:
`
`and so independent o:
`
`those preambles at the eN3 is the same,
`_OSS .
`
`This is needed because
`
`path—I
`
`several simultaneous preamb'
`
`e transmissions can take place in
`
`the same PRAC{ resource and in order to detect them,
`
`their
`
`power at the eN3 needs to be roughly the same to avoid the
`
`well—known near—far problem for spread spectrum
`
`transmissions. However subsequent uplink transmissions on
`
`Page4of36
`
`Page 4 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`i are orthogonal,
`
`and so called
`
`fractional power
`
`can be used. This a"
`
`'ows higher
`
`that are near th
`
`N3 b caus
`
`in
`
`transmit TX powers
`]f__
`JCUC
`
`that those
`
`Es generate to neighbor ce'
`
`edge J.38.
`This method allows higher average uplink bit
`on the PUSCH.
`
`"s is small as compared to
`
`cell
`
`rates
`
`mmm
`
`In general,
`
`the
`
`value
`
`used by
`
`the U?
`
`‘|
`
`eN3 does not know what is the path—loss
`in its .:u'|
`
`formula
`
`PL compensation PC
`In
`a U? being
`
`l0
`
`used
`
`for the UE's RACH message.
`
`the case of
`
`handed—over
`
`from another eN3,
`
`an estimate o_
`
`the path—loss
`
`value could be provided to
`
`the Large
`
`t cell/eN3
`
`based on U3
`
`measurement reports sen"
`
`t to the serving eN
`
`3 prior to the
`
`handover.
`
`iowever,
`
`for
`
`an initial access or
`
`for UL or DL
`
`l5
`
`data arrival this is
`
`not possible since there is no handover.
`
`Because of this,
`
`the
`
`eN3 does not know the power di
`
`"erence
`
`between the UE’s
`
`QACH preamble transmission and the UE’s
`formula.
`
`transmission
`
`Jsing the PUSC
`
`4 power
`
`20
`
`[oo11]
`
`It has been agreed that
`
`Message 2 contains a power
`
`control command
`
`-01’
`
`transmission o"
`
`- Message
`
`de_
`
`fini tion and objec
`Therefore the eN3 does not have
`fied.
`
`tive o_
`
`that command is
`
`3,
`HO
`
`SJ
`
`but the
`
`t yet
`
`"icient
`
`speci:
`in
`formation to give a correc
`
`t power control
`
`command in
`
`25
`
`30
`
`35
`
`response to
`
`the UE’s RACH message.
`
`The resul
`
`t
`
`then, and as
`
`mentioned above,
`
`i
`is that the power that the U3
`
`JSGS for
`
`transmission of
`
`Message 3 is not known to the eW
`
`R if the U3
`
`uses the PUSCH PC
`
`formula
`
`for sending Message 3.
`
`mmz] The problem there:
`
`fore may be stated as how best to
`
`define a transition from
`
`the
`
`full path loss compensated
`
`preamble transmission to
`
`the PUSCH (
`
`fractional)
`
`power control
`
`system.
`
`Summary:
`
`mms
`
`In accordance with an exemplary embodiment of the
`
`invention is a method that comprises using a processor to
`
`Page 5 of 36
`
`Page 5 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`initialize for i=0 a
`
`first power control adjustment state
`
`9(0)
`
`for an uplin< control channel and a second power control
`
`adjustment state "(U
`
`"or an uplink shared channel
`
`to each
`
`reflect an open loop power control error;
`
`using the processor
`
`to compute an initial transmit power
`
`for the uplink shared
`
`channel using fu‘l pathloss compensation,
`
`wherein the initial
`
`transmit power depends on a preamble power o
`
`a "irst message
`
`sent on an access channel,
`
`and is initialized
`
`with the second
`
`power control adjustment state
`
`f(O);
`
`and sending
`
`from a
`
`transmitter a third message on
`
`the uplink shared channel at
`
`the initial transmit power.
`
`[oo14]
`
`In accordance with an exemplary embodiment of the
`
`invention is a computer readable memory storing a computer
`
`program that when executed by a processor results in actions.
`
`In this embodiment the actions comprise:
`
`initializing
`
`_:‘O_|,,
`
`i=0
`
`a ;irst power control adjustment state g(O)
`
`for an uplink
`
`control channel and a second
`
`power control adjustment state
`
`"(H
`
`"or an uplin< shared channel
`
`to each re"
`
`ect an open
`
`loop power control error;
`
`computing an initial
`
`for the uplink shared channel using
`
`full path:
`
`_ transmit power
`_OSS
`
`compensation,
`
`wherein the initial transmit power depends on a
`
`l0
`
`l5
`
`20
`
`preamble power o
`
`a
`
`"irst message sent on an access channel,
`
`and is
`
`initialized with
`
`the second power control adjustment
`
`25
`
`state
`
`f(O);
`
`and outputting the initial transmit power
`
`for
`
`transmission o_ a
`
`third message on the uplink
`
`shared channel.
`
`30
`
`35
`
`mmq
`
`In accordance with an exemplary embodiment of the
`
`invention is an apparatgs which comprises at least a
`
`processor and a transmitter.
`
`The processor is configured to
`
`initialize,
`
`for i=0, a first power control adjustment state
`
`g(O)
`
`for an uplin< control channel and a second power control
`
`adjustment state "(i)
`
`"or an uplin< shared channel
`
`to each
`
`reflect an open loop power control error, and
`
`configured to
`
`compute an initial transmit power
`
`for the uplink shared
`
`channe'
`
`using "u"
`
`pathloss compensation,
`
`in which the
`
`initial transmit power depends on a preamble power o
`
`a
`
`"irst
`
`message sent on an access channel,
`
`and the initial power is
`
`Page 6 of 36
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`Page 6 of 36
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`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`ini
`
`state
`
`tialized with the second power control adjustment
`The
`
`transmitter is con:
`
`figured to send a third message
`
`f(O).
`OH
`
`the uplink shared channel at
`
`the initial transmit power.
`
`[0016]
`
`These and other aspects
`
`O_
`
`the invention are detailed
`
`with particularity below.
`
`Rrie" Description of the Drawings:
`
`l0
`
`mm7] The foregoing and other aspects of
`
`the exemplary
`
`embodiments of
`
`this invention are made more evident in the
`
`following Detailed Description,
`
`when read in conjunction with
`
`the attached Drawing Figures.
`
`l5
`
`[0018]
`
`Figure 1A reproduces Figure 4-1 of 3GPP TS 36.300, and
`
`shows the overall architecture of
`" the E—UTRAN system.
`
`mmq
`
`Figures 13 and 1C respectively reproduce Figures
`
`l0.l.
`
`5.l-l and lO.l.5.l-2 of
`
`3GPP TS 36.300 v8.4.0,
`
`20
`
`Conte
`
`ntion
`
`3ased Random Access Procedure and Non— Contention
`
`3ased
`
`Random Access Procedure.
`
`mozm
`
`Figure 2 shows a simpli
`
`fied b'oc< diagram of various
`
`elect
`
`ronic devices that
`
`are siitab'e for use in practicing
`
`25
`
`the e
`
`"
`xemplary embodiments o_
`
`this invention.
`
`mom]
`
`the o
`
`compu
`
`Figures 3-4 are logica'
`
`flow diagrams that illustrate
`
`peration of methods,
`
`and the result of
`
`execution o;
`
`ter programs instructions by
`
`the data processor such as
`
`30
`
`that shown in Figure 2 according to various specific
`
`embodiments of the invention
`
`Detailed Description:
`
`35
`
`[0022]
`
`In the specific examples given below,
`
`the problem solved
`
`by those embodiments is how the power contro'
`
`formu'as
`
`.:O.|,,
`
`PUSCH and PUCCH are taken in use during or after the Random
`ACCGS s procedure.
`
`Page 7 of 36
`
`Page 7 of 36
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`

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`VV()2009/135848
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`PCT/EP2009/055430
`
`[0023]
`
`To the inventors’
`
`{H
`
`solved before.
`
`owledge this problem has not been
`Operation according to 3GPP TS 36.213 v.8.2.0
`,ha-
`?xhibit
`is
`
`(attached to the priori
`
`ty document as
`
`Q)
`
`Message 3
`
`(see Figure 1?)
`
`is transmitted using the P
`
`JSC{ PC
`
`formula taking into account
`
`the PC command received
`
`from the
`
`eN3 in Message 2
`
`(see Figures 13 and lC).
`
`However,
`
`this does
`
`not specify how the U3 specific parameters of the PUSCH and
`
`PUCCH power contro'
`
`formulas are initialized.
`
`[mm4] The PUSCH PC formu'a for the U3 in the ith subframe is
`
`defined at section 5.l.'.l of 3GPP TS 36.213 v8.2.0 as
`
`fo'lows:
`
`PPUSCH (5) = 111i11{PMAX»1010g10 (MPUSCH (5)) + Po_PUscH (J) + 05 ‘ PL+ ATF (TF(i)) + f(i)}
`
`(d3m);
`
`l0
`
`l5
`
`[1]
`
`where,
`
`gflxis the maximum aI
`
`_lowed power that depends on the U
`
`L*J
`
`20
`
`power class
`
`Mfifififlais the size of the PUSCH resource assignment
`resource blocks valid for
`
`expressed in number of
`
`subframe i.
`
`PO_PUSCH
`
`" the sum of a 8-bit
`s a parameter composed of
`
`25
`
`cell specific nominal component
`
`PO_NOMINAL_PUSCH (J) signalled
`
`from higher
`
`layers for j=0 and 1
`
`in the range o;
`
`[_
`
`am with ld?
`
`resolution and a
`
`-bit U3
`
`specific
`
`’76,74] d
`
`component
`
`PO_UE_PUSCH (J)
`
`COD
`
`figured by RRC
`
`for j=0 a
`For PUSCH
`
`nd 1
`
`in
`
`the range o
`
`[-8,
`
`7]
`
`d.
`
`% with 1d? resolution.
`
`30
`
`35
`
`to a configured
`(re)transmissions corresponding
`for PUSCH
`
`scheduling grant then j=0 and
`
`(re)transmissions corresponding
`DC"
`
`format
`
`0 associated with a new packet transmission
`
`to a received PDCCH with
`
`then j=l.
`a e {0, 0.4, 0.5, 0.6,
`
`0.7, 0.8, 0.9,1}
`
`is a 3-bit cell speci
`
`‘ic parameter
`
`provided by higher layers
`
`Page 8 of 36
`
`Page 8 of 36
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`

`
`W0 2009/135848
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`PCT/EP2009/055430
`
`0
`
`PL is the downlink pathloss estimate calculated in the
`UL*J
`
`0 AWaTU»:1m°&“2M%&'%)for KS:125and O for K5:Owhere K5
`
`is
`
`a cell specific parameter given by RRC
`
`5
`
`o TFU)is the PUSC{ transport format valid for
`subframe i
`
`c) MPR = modulation X coding rate = NWHVA53whereNWH>
`are tte number o
`
`in"orma,ion bits and ATE
`
`is the
`TF(z')
`
`number of resource e'ements determined from
`
`l0
`
`and A4W“HU)for subframe i
`
`-
`.
`.-.
`l
`.
`6
`1W“His a U; specific correction value, also referred to
`
`0
`
`as a TPC command and is included in PDCCH with DC:
`
`format 0 or jointly coded with other TPC commands in
`
`PDCCH with DC" "orma, 3/3A. The current PUSCT power
`control adjustment state is given byfa) which is defined
`
`by:
`
`c
`
`-fl0:fU_D+®W“HU_K”WW)if
`
`fw) represents accumulation
`
`I where f“»:O and K5WG1= 4
`
`I The U3 attempts to decode a PDCCH of DC"
`
`format
`
`0 and a PDCC{ of DC" format 3/3A in
`
`every subframe except when in DRX
`
`I &WWH:Od? for a subframe wtere no TPC command
`
`is decoded or where DRX occurs.
`
`I The5W“H d3 accumulated valies signalled on
`
`PDCC wit? DC" "orma, O are [—l, O, L, 3].
`
`I The &KH d3 accumulated values signalled on
`
`PDCC witt DC" "orma, 3/3A are one of
`
`[—l,
`
`l]
`
`or
`
`[—l, O,
`
`l, 3: as semi—statically configured
`
`I
`
`I
`
`I
`
`by higher layers.
`
`f Ufi has reached maximum power, positive TPC
`commands are not accumulated
`
`“ Ufi has reached minimum power, negative TPC
`
`commands shall not be accumulated
`
`U2
`
`L*J
`
`shall reset accumulation
`
`0 at cell—change
`
`0 when entering/leaving RRC active state
`
`0 when an absolute TPC command is received
`
`l5
`
`20
`
`25
`
`30
`
`35
`
`Page 9 of 36
`
`Page 9 of 36
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`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`when
`
`PO,UE,PUSCH
`
`'
`is received
`
`when tte U3
`
`(re)synchronizes
`
`o
`
`ffi):&KHU_KHWm)i:
`value
`
`fw) represents curr
`
`ent absolute
`
`I where &UWHO_K”WW)was signalled on PDCCH with
`DC"
`format
`0 on subframe i_K”WW
`
`I where KPUSCH :4
`
`I The 3%“ d3 absolite values signalled on
`
`PDCCH with DC" format 0 are [-4,-l, L, 4].
`
`I
`
`fU)=fO_Dfor a subframe where no PDCC{ with
`
`DC"
`
`format
`
`0 is decoded or where DRX occurs.
`
`o
`
`f“) type (accumulation or current absolite) is a
`
`U3 specific parame,er Lha, is given by RRC.
`
`[mms] The PUCCH PC formula for the U3 in the ith sibframe is
`
`defined at section 5.1.2.1 of 3GPP TS 36.213 v8.2.0 as
`
`fo'lows:
`
`PPUCCH (i) f mm{PMAX » PO_PUCCH + PL + ATF_PUCCH (TF) + 8(1)} (d3m) I.
`
`[2]
`
`where
`
`0 A”3“xHaF)table entries for each PUCCH transport forma,
`
`(TF ) defined in Table 5.4-1 in :3] are given by RRC
`o 3ach signalled A”9“xHaF)2—bit value corresponds to
`a TF relative to PUCCH DC" format 0.
`
`PO_PUCCP
`
`the sum of a 5-bit
`
`"
`is a parameter composed of
`P
`qMMmM3wam
`
`cell specific
`
`parameter
`
`provided by higher
`
`layers with l
`
`d3m and a U
`
`L*J
`
`d3 resolution in the range o:
`PO_UE_PUCCP
`
`specific component
`
`f
`
`[—l27,
`
`-96]
`
`COD
`
`figured by
`
`??C in the
`5
`
`)UCCH
`
`range of
`iS a L:L*J
`
`[-8,
`
`7] d? with l
`
`d3 resolution.
`
`specific correction value,
`
`al
`
`so referred
`
`10
`
`15
`
`20
`
`25
`
`3O
`
`to as a TPC command,
`
`included in a PDCC
`
`4 with DC"
`
`format
`
`1A/1/2 or sen"
`
`: jointly coded with other U
`
`L*J
`
`specific
`
`PUCCH correction values on a PDCCH wi
`
`th DC"
`
`format 3/3A.
`
`35
`
`o The U
`
`L*J a
`
`:tempts to decode a PDCC
`
`1 with DC" format
`
`3/3A and
`
`sub
`
`frame
`
`a PDCCH with DC"
`
`format TA/1/7 on every
`
`except when in DRX.
`
`Page 10 of 36
`
`Page 10 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`10
`
`O
`
`5PUCCH
`
`from a PDCCT with DC"
`
`‘ormat TA/1/7 overrides
`
`that
`
`from a PDCCE with DC"
`
`‘ormat 3/3A when both
`
`are decoded in a given subframe.
`
`O
`
`5PUCCH :0 dig
`
`‘or a subframe wkere no PDCCE with DC:
`
`format lA/l/2/3/3A is decoded or where
`
`DRX occurs.
`
`O
`
`gU)=gU—D"APmrHU‘K¥mrH) where 80)
`
`is the Current
`
`PUCCH power control adjustment state with initial
`
`condition gm):O.
`
`I The émafl d? va'ues signa'
`DC"
`"orma-
`
`TA/1/7 are [—’, O,
`
`l, 3].
`
`"ed on PDCC with
`
`I The émflfl d? va'ues signa'
`3/3A are
`
`DC"
`
`"orma,
`
`"ed on PDCC with
`
`[—1,’] or
`
`|:_1IOI1I3:| as
`
`semi—statically configured by higher layers.
`'1
`
`Ufi has reached maximum power, positive TPC
`
`commands are not accumulated
`'1
`
`Ufi has reached minimum power, negative TPC
`
`commands shall not be accumulated
`
`shall reset accumulation
`
`u;
`
`G
`
`I
`
`0 at cell—change
`
`0 when entering/leaving RRC active state
`PO_UE_PUCCH
`-
`is received
`
`0 when
`
`0 when the U3
`
`(re)synchronizes
`
`l0
`
`l5
`
`20
`
`[mus] The preamble PC ‘ormula ‘or the UE’s transmission on the
`
`25
`
`RACH is:
`
`preamble : Ptarget +
`
`+ Aprampup
`
`I
`
`l: 3 :|
`
`where
`
`30
`
`0
`
`0
`
`0
`
`P
`‘Hy’
`
`.
`is
`
`the broadcasted target power;
`
`PL is the path loss that U3 estimates jrom DL; and
`
`WWW is the power ramp—up app'ied ‘or preamble
`
`retransmissions.
`
`35
`
`[0027]
`
`As can be seen above at equation
`
`[1],
`
`the
`
`‘ormula
`
`- or
`
`H>
`
`U“HO) depends on the current PUSCH power control adjustment
`
`Page 11 of 36
`
`Page 11 of 36
`
`

`
`W0 2009/135848
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`PCT/EP2009/055430
`
`11
`
`state which is termed fa).
`
`For accumulation,
`
`this
`
`adjustment state depends on previous adjustments made in
`previous sibframes, even for the case where fa) is set to an
`
`absolute value since it is set jor the sibframe (r_Kf””n.
`
`5 When the U? ‘irst sends data on the PUSCl,
`
`there is no
`
`previous sibtrame and so i=O, which is addressed in 3GPP TS
`36.2l3 v8.2.0 as zeroing Ojt the entire term so that
`f“D:O.
`
`Further, whi'e it is true that
`
`the JE is to reset its
`
`accimulatior whenever it receives a new JE—specific portion
`
`10
`
`PO_PUCCH)
`-CO-I»
`(and S.im—i'a1,‘|
`PO_UE_PUSCH(./.) O: the PO_PUSCH(j)
`Y
`, after a
`RACl access the U L*J has received no J?—speci‘ic portion and so
`
`it lacks that parameter to reset according to 3GPP TS 36.2l3.
`
`mam] Also, at equation [2]
`
`the power control
`
`‘ormula ‘or the
`
`l5
`
`PUCCH 1$WTH0) depends on the current PUCCH power control
`adjustment state which is termed gG)and which also depends
`
`on previous adjustments made in previous PUCC
`
`sibframes.
`
`When the U? ‘irst sends a message on the PUCC ,
`
`there is no
`
`previous sibframe and so i=O, which is similarly addressed in
`
`20
`
`3GPP TS 36.2;3 v8.2.0 as zeroing out the entire term so that
`
`g(0)=0
`
`[M29] Consider the case for contention—less random access such
`
`as that shown at Figure lC, where the U? transmits preambles
`L*J
`that are dedicated jor that U2.
`
`The embodiments o:
`
`the
`
`25
`
`invention described :or contention—less random access may
`
`also be used for contention based random access when it is
`
`considered that collisions will be infrequent enough in the
`
`contention—based system so as not to substantially a
`
`"ect
`
`30
`
`operation in the cell.
`
`mam] According to an embodiment of the invention,
`
`the U
`
`L*J
`
`receives a power control command (e.g., AB“)
`
`in the preamble
`L*J
`then
`
`response from the eN3, which is Message 2.
`
`The U
`
`35
`
`initiates the PC tormula ‘or PUSCH and PUCCH, or compensates
`
`open loop error, according to the following equations:
`
`Page 12 of 36
`
`Page 12 of 36
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`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`12
`
`.
`
`P
`O
`
`_UE_PUSCH +
`
`rampup
`: APPC " AP
`
`P0_UE_PUCCH + 3(0) : APPC "
`
`APrampup
`
`[0031]
`
`These equations say that the sum of the U
`P
`P
`O_UE_PUS CH
`O_UE_PUCCH )
`
`OI
`
`power control constants (
`control initial states (f«» or 3a»)
`
`is equal
`
`to the open
`
`loop power control error,
`
`taking into account
`
`the preamble
`
`power ramp—up.
`
`IPC is here assumed to be the di
`
`"erence
`
`[4b]
`
`L*J
`
`specific
`
`and the power
`
`between the
`
`target preamble power and
`
`l0
`
`actually observes.
`
`the power that eN3
`- AP
`The actual value of
`PC may be signalled
`or to save
`
`directly by
`
`the eN3 as
`
`the power control command,
`
`on signalling overhead
`
`sequence (one,
`
`two or more bits)
`
`which the receiving U
`
`L*J
`
`the eN3 may exp"
`icit'y
`signal
`a bit
`as the power control command
`JSGS as an index
`
`to look up the trie
`
`l5
`
`value
`
`IPC that is associated in a local:
`
`_y stored table with
`
`that index.
`
`man] There are several options for dividing the correction
`
`between the U3 specific constants and the power control
`
`20
`
`states.
`
`power control terms
`
`For example,
`P
`OJEJUWH and
`
`in a first option the U3 specific
`P
`O1E3“TH could be
`
`initialized to zero and the whole correction is covered by
`
`f(0 or g<0>_
`
`read
`
`In this case then equa'
`rampup
`f(0) = g(0) = APPC + AP
`
`:ions 4a and 4b would
`
`for initiating the closed loop
`
`correction values
`
`done as
`
`for PUCCH and PUSCT. This can be always
`far as the power control state f is accumulated.
`
`(According
`
`to current 3GPP agreemen
`
`accumulating.)
`
`However,
`
`i
`
`:s 3 is always
`f f is modi
`
`fied wi'
`
`:h absolute PC
`
`commands,
`
`its dynamic range is limited and may not cover the
`APPC-
`
`whole open loop correctio
`
`1']
`
`MWW.
`
`"f this happens,
`
`the part of
`
`the correc
`
`tion that cannot be included in fa»
`P
`O_UE_PUSCH
`
`AS
`
`could be taken into account by adjusting
`
`another example,
`
`a second option is
`
`error into account adjusting principally the U
`P
`P
`O_UE_PUSCH
`O_UE_PUCCH .
`
`power control terms
`
`a n d
`
`These parameters
`
`to take the open loop
`L*J specific
`
`25
`
`30
`
`35
`
`Page 13 of 36
`
`Page 13 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`13
`
`have a limited range and the part of the open loop error that
`-1
`these UL
`
`cannot be compensated by adjusting
`
`specific
`
`constants could be covered by initializing the power control
`
`states fa» or 3a» to a nonzero valie.
`
`The bene"it o" the
`
`first option is that the eN? wou'd <now the U3 specific
`
`constants R3mU”“H and Rlmgmml
`
`(at least when f is
`
`accumulating), which might ma<e later adjustments of these
`
`constants easier.
`
`However,
`
`the second option could be more
`
`natural because the purpose of the U? specific constants is
`
`mainly to compensate systematic errors in the PL
`
`determination and TX power setting and these are already
`
`visible as an error in the open loop power control of the
`Of
`the above
`
`preambles.
`
`course,
`
`two options are presented
`
`only as non—limiting examples and
`
`this aspect of the
`
`invention is not limited to only those two.
`
`man] For the case of a dedicated preamble such as is shown at
`
`Figure 1C or when the preamble collisions of a contention-
`
`based system are otherwise infrequent,
`
`the power for Message
`
`3 may be generated by using the PUSC{ PC formula directly
`
`according
`
`This may lead to UI
`
`to the above explained embodiment of the invention.
`L*J
`
`transmit TX power that is unnecessarily
`
`high, but the inventors do not see this as a problem.
`
`mam] The inventors have determined that a problem could arise
`
`in the above explained procedure, specifical'y where two UEs
`
`transmit th sam pr ambl
`
`s gu nc
`
`and use fractiona'
`
`PL
`
`l0
`
`l5
`
`20
`
`25
`
`30
`
`compensation for Message 3.
`
`pronounc d wh n th pr ambl
`received at the eN3 stronger
`with small PL.
`The
`
`The problem appears most
`a U7‘.
`
`with a large PL is
`
`o"
`
`than the preamb'
`
`Lu‘
`e of another 1
`
`fractional PC could result in Message 3
`
`of the U2
`
`L*J
`
`wi
`
`th the smaller PL being received at
`
`a stronger signal strength than the Message 3 ol
`
`the eN3 with
`
`the U Lu‘
`
`with
`
`the larger PL. This would of
`
`course make detection by the
`
`35
`
`eW? of th
`
`w ak r M ssag
`
`3 l ss likely, despite
`
`the fact
`
`that in the above scenario the weaker Message 3 is from
`-—.
`L
`J* who has received correct timing advance.
`
`Decoding of
`
`the
`
`the
`
`Page 14 of 36
`
`Page 14 of 36
`
`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`14
`
`stronger Message 3 is likely to fail because the timing
`advance of a wrong UL*J has been used when transmitting it.
`transmissions
`
`Further, if the timing advance for Message 3
`are set based on
`
`the preamble of the U3 with the larger PL,
`
`then the U
`
`L*J
`
`with the smaller PL would JSG a large power and
`
`the wrong TA value when transmitting its Message 3, and
`
`th r by g n rat
`
`int r_ r nc
`
`to other transmissions.
`
`l0
`
`l5
`
`-14
`To achieve improved performance when the UH
`
`[mmm
`
`performs
`
`contention based random access and when preamble collisions
`
`are assumed to be frequent, another embodiment of the
`
`invention d fin s th M ssag
`
`3 power relative to preamble
`
`power, i.e. full path loss compensation used.
`
`The objective
`
`is that transmit TX power of Message 3 would not be
`
`unnecessary high.
`
`In one particular embodiment,
`
`objective can be realized by Jsing the fol'owing
`
`this
`
`formula:
`
`P
`Msg 3
`
`:1’
`preamble
`
`-+A
`
`0,preambze_Msg3 + APC_Msg3 " 1010g10 (MPUSCH
`
`+ ATF (TF(i))-
`
`[5]
`
`20
`
`[0036]
`
`The terms AAUWHG) and AH*TFO» in equation [5] are the
`
`same terms as in equation [1].
`
`I%*3is the
`
`Like equation [1],
`P
`MW is not
`
`minimum of IRMX and tte above summation,
`
`but
`
`explicitly shown at equation [5]. Note that AD$TTKD)is
`u
`calculated at the U? from signalling the U; receives (e.g., d
`
`and Ks), and that for the case where d=l full path loss
`
`compensation is used in this Message 3 power,
`
`just as for the
`
`preamble power.
`
`Di""erenL "rom equation [1]
`
`is the
`
`equation [5]
`
`term “W““”JW3 which corresponds to a typical
`
`power o "set between a Message 3 and the preamble whose power
`0,preumble _ Mxg 3
`
`corresponds to the detection threshold.
`
`The term
`
`can be a parameter broadcast in System "nformation or it
`
`could be specified in the appropriate wireless standard
`
`governing RACH procedures and pre—stored in the UE's memory.
`A
`The term PCWW3
`
`is the power control command included in the
`
`preamble response
`
`(e.g.,
`
`Message 2), and as above the eN3 may
`
`signal it directly or more likely as a short bit sequence
`
`25
`
`3O
`
`35
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`Page 15 of 36
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`Page 15 of 36
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`

`
`VV()2009/135848
`
`PCT/EP2009/055430
`
`15
`
`that is an index which the U
`
`3 uses to access a loo<up table
`
`for the
`
`true value.
`
`It
`
`corresponding parameter
`because
`:rol command ol
`
`this power con
`
`the second embodiment
`
`is here named di""erent'y than the
`A
`-
`,
`_.
`,
`.
`PC ol
`the _lISL embodiment above
`
`5
`
`is applicable only to Message 3 or to
`
`the PUSCH transmissions
`
`following Message 3,
`for all the UL
`
`the PC system
`
`whereas
`
`the parameter
`
`PC initializes
`
`transmissions.
`
`A:
`
`ter
`
`transmitting Message 3 or soon after that the
`--1
`O
`
`the normal PUSCH power control.
`
`For this
`
`U
`
`L*J
`
`should move
`
`to using
`
`«q.
`
`['1
`
`l0
`
`purpose,
`
`the U?
`
`t
`CO U.
`
`already in Message 3,
`
`the power o
`
`s
`
`d report as early as possible,
`tW
`t b
`n th
`
`preferably
`
`us d power
`More
`
`and the power calculated wi
`the UL*J
`
`can repor
`
`generally,
`
`th the PC Equation 1.
`
`: as early as Message 3 the power
`
`di" "erence
`
`(or an
`
`indication of the di"" r nc )
`
`b tw
`
`n th
`
`l5
`
`second power
`
`(the
`
`transmit power of
`
`Message 3
`
`:ed using
`
`full pathloss compensation,
`
`from equation
`and
`
`[5:)
`which was compu"
`__rac
`
`tional compu
`
`tation o_
`
`the second power (e.g.,
`
`if the
`
`ower
`
`for Message 3 were ins
`
`:ead computed using equation
`
`[l:
`UL*J
`
`).With this knowledge,
`The
`
`J? CO
`
`the eNI
`
`3 could then initialize the
`
`a p
`
`20
`
`specific constants.
`
`Jld also report other
`
`parameters that are unknown
`
`to eW3 and provide same
`
`in
`
`formation e.g.,
`
`power ramp
`
`Jp value and pathloss or
`
`power
`
`rampup ,
`
`power headroom and max U3
`
`power
`
`(U3
`
`power class).
`
`From a signal:
`the two _:O1,mu '
`
`_ing point o‘
`s most e
`
`as i
`
`25
`
`view reporting
`
`the di"
`
`"icient. Alternative
`
`to reporting
`
`I)
`"erence o;
`
`one Or more parameters,
`
`the
`
`U?
`
`could,
`
`a
`
`.:te.|,,
`
`Message 3,
`A
`
`PC,Msg3
`
`H
`
`apply the
`
`first embodiment,
`
`Equations 4a and 4b
`
`transmitting
`PC
`
`":0
`
`equating
`
`3O
`
`[0037] Re
`
`ference is now made to Figure 7
`
`for i"
`
`lustrating a
`
`simpli;
`
`ied block diagram of
`
`vario