US008094554B2
`
`(12) Ulllted States Patent
`Gholmieh et al.
`
`(10) Patent N0.:
`(45) Date of Patent:
`
`US 8,094,554 B2
`Jan. 10, 2012
`
`(54) COMPRESSED MODE OPERATION AND
`POWER CONTROL WITH DISCONTINUOUS
`
`TRANSMISSION AND/0R RECEPTION
`
`_
`.
`.
`(75) Inventors: Aziz Gholmieh, San Dlego, CA (U S);
`Etienne F. Chaponniere, Rome (IT);
`Francesco Grilli, La Jolla, CA (US);
`Juan M‘mtOJ'O’ San Diego’ CA (Us);
`aljlg§lall Edward Tenny, PoWay, CA
`
`(73) Assignee: QUALCOMM Incorporated, San
`Diego, CA (Us)
`
`7/2008 Warich et a1. ............... .. 370/318
`7,406,056 B2 *
`5/2011 Marinier et al. ............ .. 711/167
`7,941,626 B2 *
`5/2002 Numminen
`2002/0064140 A1
`2002/0176513 A1 * 11/2002 Gouessant et al. .......... .. 375/297
`
`370/321
`1/2006 Hildebrand et al.
`2006/0002323 A1 *
`2006/0034245 A1* 2/2006 Nguyen ...................... .. 370/345
`C t-
`d
`( on mue )
`FOREIGN PATENT DOCUMENTS
`1427636 A
`70003
`(Continued)
`
`CN
`
`OTHER PUBLICATIONS
`
`( * ) Notice:
`
`Subject to any disclaimer’ the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 961 days.
`
`Nokia, 3GPP TSG-RAN WGl Meeting #46bis Rl-062892, Seoul,
`South Korea’ Oct' 943’ 2006'
`(Continued)
`
`(21) Appl. N0.: 11/923,983
`_
`(22) Flled'
`
`Oct‘ 25’ 2007
`
`Primary Examiner * KWang B Yao
`A '
`E '
`Ng y Ng
`sslstant xamlner * u en
`0
`(74) Attorney, Agent, or Firm * Charles Chesney
`
`(65)
`
`Prior Publication Data
`
`(57)
`
`ABSTRACT
`
`Us Zoos/0102880 A1
`
`May 1’ 2008
`_
`_
`Related U‘s‘ Apphcatlon Data
`(60) Provisional application No. 60/863,128, ?led on Oct.
`26 2006'
`,
`
`(51) Int. Cl.
`(2006.01)
`H04] 3/14
`(52) US. Cl. ....... .. 370/230; 370/322; 370/328; 370/330
`(58) Field of Classi?cation Search ................ .. 370/229,
`370/230’ 235, 310, 322, 328, 329, 330
`See application ?le for Complete Search history
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`5,701,302 A 12/1997 Geiger
`6,785,250 B2 *
`8/2004 Vayanos et al. ............. .. 370/335
`7,372,842 B2
`5/2008 Kim et al.
`
`Techniques to support operation in a compressed mode and/
`or a continuous packet connectivity (CPC) mode are
`described. In an aspect, a user equipment (U E) may obtain an
`assignment of enabled Subframes fOr the CPC mOde and an
`assi nment of transmission a s for the com ressed mode.
`g
`g P
`P
`The transmission gaps may be aligned With idle times
`betWeen the enabled subframes. The UE may exchange data
`during enabled subframes not overlapping the transmission
`gaps andmay skip data exehanges during enabled subframes
`Overlappmg the transm1ss1on gaPS-_T1_1e UE may make Cell
`measurements durrng the transm1ss1on gaps. In another
`aspect, the UE may obta1n enabled subframes and sklpped
`subframes, exchange data during enabled subframes not cor
`responding to the skipped subframes, and skip data
`exchanges during the skipped subframes. In yet another
`aspect, the UE may receive orders on a shared control channel
`to quickly enable and disable the compressed mode.
`
`40 Claims, 10 Drawing Sheets
`
`900
`w
`
`T
`
`1912
`
`Obtain an assignment of
`enabled eubframes for a ?rst mode
`(e.g., a CPO mode) for a UE
`
`r914
`
`Obtain an assignment of
`transmissiun gaps for a second
`mode (e.g., a compressed mode)
`for the UE, with the transmission
`gaps being aligned with idle times
`between the enabled subframes
`1916
`Exchange data during enabied
`subfiames not overlapping
`the tiansmission gaps
`
`1918
`
`skip data exchanges during
`enabled subtrames overlapping
`the transmission gaps
`:920
`i
`Make cell measurements (e.gi,
`fpr other frequencies and/or other
`systems) during the transmission gaps
`
`i)
`
`1
`
`HUAWEI 1016
`
`

`

`US 8,094,554 B2
`Page 2
`
`US. PATENT DOCUMENTS
`2006/0072612 A1
`4/2006 LietZ
`2007/0037601 A1* 2/2007 Mittal et al. ................ .. 455/525
`2007/0133479 A1* 6/2007 Montojo et al. .... ..
`. 370/335
`2007/0207824 A1* 9/2007 Bhattacharjee et a1.
`. 455/513
`2008/0069280 A1* 3/2008 Wang et a1.
`. 375/363
`2008/0101280 A1* 5/2008 Gholmiehet al. .
`370/328
`2008/0309490 A1* 12/2008 Honkanen et al. .
`. 340/572.1
`2009/0203381 A1* 8/2009 Ueda ........................... .. 455/439
`
`EP
`JP
`JP
`JP
`TW
`WO
`WO
`
`FOREIGN PATENT DOCUMENTS
`1670272
`6/2006
`2005034555 A
`2/2005
`2005229628 A
`8/2005
`2007510341 A
`4/2007
`580805
`3/2004
`02058280
`7/2002
`WO2005046073 A1
`5/2005
`OTHER PUBLICATIONS
`
`“Interaction of compressed mode with HSDP ” 3rd Generation Part
`nership Project (3GPP); Technical Speci?cation Group (TSG) Radio
`Access Network (RAN); Working Group 1 (WGl), XX, XX, Feb. 22,
`2002, pp. 1-3, XP002224780 the whole document.
`
`INFINEON: “Alignment of CPC UL DRX TTI due to Compressed
`Mode” 3GPP TSG-RAN WGZ Meeting #58, May 7, 2007-May 11,
`2007 pp. 1-3, XP002466339 Kobe, Japan. The whole document.
`3GPP Group Radio Access Networks: “Physical layer procedures,
`(FDD), 3G TS 25.214 version 3.0.0” 3rd Generation Partnership
`Project (3GPP), Technical Speci?cation, Oct. 1, 1999, pp. 1-39,
`XP002473924.
`International Search ReportiPCT/US07/082746, International
`Search AuthorityiEuropean Patent Of?cei Apr. 9, 2008.
`3GPP TR 25.903 v7.0.0, “3rd Generation Partnership Project; Tech
`nical Speci?cation Group Radio Access Network; Continuous Con
`nectivity for Packet Data Users,” Release 7, Mar. 2007.
`3GPP TS 25.211 v7.3.0 (Sep. 2007), 3rd Generation Partnership
`Project; Technical Speci?cation Group Radio Access Network:
`Physical channels and mapping of transport channels onto physical
`channels (FDD) (Release 7).
`Written OpinioniPCT/US07/082746, International Searching
`AuthorityiEuropean Patent Of?ce, Apr. 9, 2008.
`Dorot V.L. and Novikov F.A., Explanatory Dictionary for Computer
`Lexis, BHV-Petersburg, 2001, p. 339.
`“Taiwan Search ReportiTW096140475iTIPO- Jun. 15, 2011”.
`
`* cited by examiner
`
`2
`
`

`

`US. Patent
`
`Jan. 10, 2012
`
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`US. Patent
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`US. Patent
`
`Jan. 10, 2012
`
`Sheet 8 0f 10
`
`US 8,094,554 B2
`
`900
`K-J
`
`1000
`r/
`
`(
`
`) C
`,912
`
`)
`Start
`,1012
`l
`Determine enabled subframes
`for a UE, e.g., based on
`at least one first pattern
`,1014
`l
`Determine skipped subframes for the
`UE, e.g., based on a second pattern
`
`Start
`l
`Obtain an assignment of
`enabled subframes for a first mode
`(e.g., a CPC mode) for a UE
`l
`,914
`Obtain an assignment of
`transmission gaps for a Second
`mode (e.g., a compressed mode)
`for the UE, with the transmission
`gaps being a?gned With id|e times
`between the enabled subframes
`l
`[916
`Exchange data during enabled
`subframes not overlapping
`the transm'ss'on gaps
`‘
`Skip data exchanges during
`enabIed subframe§ ove?app'ng
`the transm'ss'on gaps
`{920
`l
`Make cell measurements (e.g.,
`for other frequencies and/or other
`systems) during the transmission gaps
`l
`End
`FIG. 9
`
`r7018
`
`r1016
`‘
`Exchange data during enabled
`subframes not corresponding
`to the skipped subframes
`‘
`Skip data exchanges
`during the skipped subframes
`l,
`,1020
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`during extended idle times
`between enabled subframes
`and covering skipped subframes
`‘
`End
`
`(
`
`>
`
`FIG. 10
`
`r918
`
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`

`

`US. Patent
`
`Jan. 10, 2012
`
`Sheet 9 0f 10
`
`US 8,094,554 B2
`
`1100
`r"
`
`1200
`r’
`
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`,1112
`l
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`compressed mode for a UE,
`e.g., via upper layer signaling
`l
`,1114
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`layer signaling) on a shared
`control channel to enable and
`disable the compressed mode
`
`)
`,1212
`
`,1214
`
`Start
`l
`Determine transmit power
`used for a first transmission
`sent in a first time interval
`l
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`for a second transmission in a
`second time interval based on
`the transmit power used for the
`first transmission and a power
`adjustment, the second time
`interval being separated from the
`first time interval by an idle period
`l
`End
`FIG. 12
`
`r1116
`‘
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`for the compressed mode when
`enabled by an order received
`on the shared control channel
`‘
`End
`FIG. 11
`
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`
`

`

`U.S. Patent
`
`Jan. 10, 2012
`
`Sheet 10 of 10
`
`US 8,094,554 B2
`
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`

`

`US 8,094,554 B2
`
`1
`COMPRESSED MODE OPERATION AND
`POWER CONTROL WITH DISCONTINUOUS
`TRANSMISSION AND/OR RECEPTION
`
`CLAIM OF PRIORITY UNDER 35 U.S.C. §119
`
`The present Application for Patent claims priority to Pro
`visional US. Application Ser. No. 60/ 863,128, entitled
`“COMPRESSED MODE OPERATION AND REVERSE
`LINK POWER CONTROL ADJUSTMENT WITH DIS
`CONTINUOUS TRANSMISSION AND/OR RECEP
`TION,” ?led Oct. 26, 2006, assigned to the assignee hereof,
`and expressly incorporated herein by reference.
`
`BACKGROUND
`
`I. Field
`The present disclosure relates generally to communication,
`and more speci?cally to techniques for operating a user
`equipment (UE) in a Wireless communication system.
`II. Background
`Wireless communication systems are Widely deployed to
`provide various communication services such as voice, video,
`packet data, messaging, broadcast, etc. These systems may be
`multiple-access systems capable of supporting multiple users
`by sharing the available system resources. Examples of such
`multiple-access systems include Code Division Multiple
`Access (CDMA) systems, Time Division Multiple Access
`(TDMA) systems, Frequency Division Multiple Access
`(FDMA) systems, Orthogonal FDMA (OFDMA) systems,
`and Single-Carrier FDMA (SC-FDMA) systems.
`A UE (e. g., a cellular phone) may be capable of operating
`on different frequencies and/or in different Wireless systems.
`The UE may communicate With a serving cell on a particular
`frequency in one system but may periodically make measure
`ments for cells on other frequencies and/or in other systems.
`The cell measurements may alloW the UE to ascertain
`Whether any cell on another frequency and/or in another
`system is better than the serving cell. This may be the case, for
`example, if the UE is mobile and moves to a different cover
`age area. If a better cell on another frequency and/or in
`another system is found, as indicated by the cell measure
`ments, then the UE may attempt to sWitch to the better cell and
`receive service from this cell.
`To make cell measurements for other frequencies and/or
`other systems, the UE may need to tune its receiver aWay from
`the frequency used by the serving cell. The system may pro
`vide gaps in transmission in order to alloW the UE to tune
`aWay its receiver and make measurements for other frequen
`cies and/or other systems. The operation of the UE may be
`complicated by these gaps in transmission.
`
`SUMMARY
`
`Techniques to support operation of a UE in a compressed
`mode With transmission gaps and/or a continuous packet
`connectivity (CPC) mode With discontinuous transmission
`(DTX) and/or discontinuous reception (DRX) are described
`herein. In an aspect, the UE may obtain an assignment of
`enabled subframes for the CPC mode and an assignment of
`transmission gaps for the compressed mode. The transmis
`sion gaps may be aligned With the idle times betWeen the
`enabled subframes. For example, each transmission gap may
`start in an idle time betWeen consecutive enabled subframes.
`The enabled subframes may be de?ned by at least one ?rst
`pattern, the transmission gaps may be de?ned by at least one
`second pattern, and each second pattern may be multiple
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`2
`times the duration of each ?rst pattern. The UE may exchange
`data during the enabled subframes that do not overlap the
`transmission gaps and may skip data exchanges during the
`enabled subframes that overlap the transmission gaps. The
`UE may make cell measurements (e.g., for other frequencies
`and/or other systems) during the transmission gaps.
`In another aspect, the UE may determine enabled sub
`frames and skipped subframes, e.g., for the CPC mode. The
`skipped subframes may be a subset of the enabled subframes.
`The UE may exchange data during the enabled subframes not
`corresponding to the skipped subframes and may skip data
`exchanges during the skipped subframes. The UE may make
`cell measurements during the extended idle times betWeen
`enabled subframes and covering the skipped subframes. The
`UE may not need to operate in the compressed mode because
`of the extended idle times.
`In yet another aspect, the UE may obtain a con?guration
`for the compressed mode and may receive orders on a shared
`control channel to enable and disable the compressed mode.
`The con?guration for the compressed mode may be sent via
`upper layer signaling, and the orders may be sent as loWer
`layer signaling. The UE may operate based on the con?gura
`tion for the compressed mode When enabled by an order
`received via the shared control channel. The orders may be
`used to quickly disable the compressed mode prior to a data
`burst for the UE and to quickly re-enable the compressed
`mode after the data burst.
`In yet another aspect, the UE may determine transmit
`poWer used for a ?rst transmission sent in a ?rst time interval
`and may determine transmit poWer to use for a second trans
`mission in a second time interval based on the transmit poWer
`used for the ?rst transmission and a poWer adjustment. The
`second time interval may be separated from the ?rst time
`interval by an idle period, Which may correspond to a trans
`mission gap in the compressed mode or an idle time betWeen
`enabled subframes in the CPC mode. The poWer adjustment
`may be determined based on open loop estimates obtained for
`the ?rst and second transmissions. The poWer adjustment
`may also be a predetermined positive value, an increasing
`value during an initial part of the second transmission, etc.
`Various aspects and features of the disclosure are described
`in further detail beloW.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 shoWs a Wireless communication system.
`FIG. 2 shoWs a frame format in Universal Mobile Telecom
`munication System (UMTS).
`FIG. 3 shoWs a transmission gap pattern sequence for the
`compressed mode.
`FIG. 4 shoWs doWnlink transmission in the compressed
`mode.
`FIG. 5 shoWs some physical channels in UMTS.
`FIG. 6 shoWs alignment of a transmission gap to idle times
`in the CPC mode.
`FIG. 7 shoWs skipping enabled subframes to obtain an
`extended idle time.
`FIG. 8 shoWs an order to quickly enable or disable the
`compressed mode.
`FIG. 9 shoWs a process for UE operation With transmission
`gaps aligned With idle times.
`FIG. 10 shoWs a process for UE operation by skipping
`some enabled subframes.
`FIG. 11 shoWs a process for UE operation With quick
`enabling and disabling of the compressed mode via orders.
`FIG. 12 shoWs a process for transmission after an idle
`period by the UE.
`FIG. 13 shoWs a block diagram of the UE and a Node B.
`
`13
`
`

`

`3
`DETAILED DESCRIPTION
`
`US 8,094,554 B2
`
`10
`
`4
`110 and provide coordination and control for these Node Bs.
`System controller 130 may be a single network entity or a
`collection of network entities.
`UEs 120 may be dispersed throughout the system, and each
`UE may be stationary or mobile. A UE may also be referred to
`as a mobile station, a terminal, an access terminal, a sub
`scriber unit, a station, etc. A UE may be a cellular phone, a
`personal digital assistant (PDA), a wireless device, a hand
`held device, a wireless modem, a laptop computer, etc. A UE
`may communicate with one or more Node Bs via transmis
`sions on the downlink and uplink. The downlink (or forward
`link) refers to the communication link from the Node Bs to the
`UEs, and the uplink (or reverse link) refers to the communi
`cation link from the UEs to the Node Bs.
`FIG. 2 shows a frame format in UMTS. The timeline for
`transmission is divided into radio frames. Each radio frame
`has a duration of 10 milliseconds (ms) and is identi?ed by a
`12-bit system frame number (SFN) that is sent on a control
`channel. Each radio frame may also be identi?ed by an 8-bit
`connection frame number (CFN) that is maintained by both a
`UE and a Node B for a call. Each radio frame is partitioned
`into 15 slots, which are labeled as slot 0 through slot 14. Each
`slot has a duration of Tslot:0.667 ms and includes 2560 chips
`at 3.84 Mcps. Each radio frame is also partitioned into ?ve
`subframes 0 through 4. Each subframe has a duration of 2 ms
`and includes 3 slots.
`UMTS supports a compressed mode on the downlink to
`provide gaps in transmission to allow a UE to make measure
`ments for neighbor cells. In the compressed mode, a serving
`cell may transmit data to the UE during only a portion of a
`radio frame, which then creates a transmission gap in the
`remaining portion of the radio frame. The UE can temporarily
`leave the system during the transmission gap to make mea
`surements for neighbor cells on other frequencies and/ or in
`other systems without losing data from the serving cell.
`FIG. 3 shows a transmission gap pattern sequence for the
`compressed mode in UMTS. In the compressed mode, user
`speci?c data for the UE is transmitted in accordance with the
`transmission gap pattern sequence, which may include alter
`nating transmission gap patterns 1 and 2. Each transmission
`gap pattern includes one or two transmission gaps. Each
`transmission gap may occur entirely within one radio frame
`or may span across two radio frames. The transmission gap
`pattern sequence may be de?ned by the parameters given in
`Table 1.
`
`TABLE 1
`
`The techniques described herein may be used for various
`wireless communication systems such as CDMA, TDMA,
`FDMA, OFDMA, SC-FDMA and other systems. The terms
`“system” and “network” are often used interchangeably. A
`CDMA system may implement a radio technology such as
`Universal Terrestrial Radio Access (UTRA), cdma2000, etc.
`UTRA includes Wideband CDMA (W-CDMA) and other
`CDMA variants. cdma2000 covers IS-2000, IS-95 and
`IS-856 standards. A TDMA system may implement a radio
`technology such as Global System for Mobile Communica
`tions (GSM). An OFDMA system may implement a radio
`technology such as Evolved UTRA (E-UTRA), Ultra Mobile
`Broadband (UMB), IEEE 802.20, IEEE 802.16 (WiMAX),
`802.11 (WiFi), Flash-OFDM®, etc. UTRA and E-UTRA are
`part of UMTS. 3GPP Long Term Evolution (LTE) is an
`upcoming release of UMTS that uses E-UTRA. UTRA,
`E-UTRA, UMTS, LTE and GSM are described in documents
`from an organization named “3rd Generation Partnership
`Project” (3GPP). cdma2000 and UMB are described in docu
`ments from an organization named “3rd Generation Partner
`ship Project 2” (3GPP2). These various radio technologies
`and standards are known in the art. For clarity, certain aspects
`of the techniques are described below for UMTS, and 3GPP
`terminology is used in much of the description below.
`FIG. 1 shows a wireless communication system 100 with
`multiple Node Bs 110 and UEs 120. A Node B may be a ?xed
`station that communicates with the UEs and may also be
`referred to as an evolved Node B (eNB), a base station, an
`access point, etc. Each Node B 110 provides communication
`coverage for a particular geographic area and supports com
`munication for the UEs located within the coverage area. The
`overall coverage area of each Node B 110 may be partitioned
`into multiple (e.g., three) smaller areas. In 3GPP, the term
`“cell” can refer to the smallest coverage area of a Node B
`and/or a Node B subsystem serving this coverage area. In
`other systems, the term “sector” can refer to the smallest
`coverage area and/or the subsystem serving this coverage
`area. For clarity, 3GPP concept of cell is used in the descrip
`tion below. A system controller 130 may couple to Node Bs
`
`20
`
`25
`
`30
`
`35
`
`40
`
`Symbol Parameter
`
`Description
`
`Value
`
`Number of transmission gap patterns in
`TGPRC Transmission gap
`pattern repetition count the transmission gap pattern sequence
`TGCFN Transmission gap CFN CFN of the ?rst radio frame for
`transmission gap pattern 1
`Slot number of the ?rst transmission gap
`slot in each transmission gap pattern
`Duration of the ?rst transmission gap in
`each transmission gap pattern
`Duration of the second transmission gap
`in each transmission gap pattern
`Duration between the starting slots of the
`
`TGSN Transmission gap
`starting slot number
`TGLl Transmission gap
`length 1
`TGL2 Transmission gap
`length 2
`Transmission gap
`
`TGD
`
`distance
`
`?rst and second transmission gaps
`
`TGPLl Transmission gap
`pattern length 1
`TGPL2 Transmission gap
`pattern length 2
`
`Duration of transmission gap pattern 1
`
`Duration of transmission gap pattern 2
`
`0 to 255
`
`slot
`1 to 14
`1 to 14
`slots
`1 to 14
`slots
`15 to
`
`269 slots
`
`1 to 144
`frames
`1 to 144
`frames
`
`14
`
`

`

`US 8,094,554 B2
`
`5
`The compressed mode is described in 3GPP TS 25.212
`(section 4.4), 25.213 (sections 5.2.1 an 5.2.2), and 25.215
`(section 6.1), all of which are publicly available.
`FIG. 4 shows downlink transmission in the compressed
`mode. Data may be transmitted at a nominal power level in
`each radio frame without a transmission gap. Data for a radio
`frame with a transmission gap may be transmitted at a higher
`power level to achieve similar reliability as data transmitted in
`a radio frame without a transmission gap. A transmission gap
`may occur between two compressed transmissions and may
`have a duration of 1 to 14 slots. A UE may be allocated a
`suf?cient number of transmission gaps of suitable duration to
`allow the UE to make measurements for cells on other fre
`quencies and/ or other systems.
`3GPP Release 5 and later supports High-Speed Downlink
`Packet Access (HSDPA). 3GPP Release 6 and later supports
`High-Speed Uplink Packet Access (HSUPA). HSDPA and
`HSUPA are sets of channels and procedures that enable high
`speed packet data transmission on the downlink and uplink,
`respectively. Table 2 lists some physical channels used for
`HSDPA and HSUPA in 3GPP Release 6.
`
`TABLE 2
`
`Channel
`
`Channel Name
`
`Description
`
`6
`reception frames and may be de?ned by an HS-SCCH recep
`tion pattern. The UE may send signaling and/or data in the
`enabled uplink subframes and may receive signaling and/or
`data in the enabled downlink subframes. The UE may power
`down during the idle times between the enabled subframes to
`conserve battery power. CPC is described in 3GPP TR
`25.903, entitled “Continuous Connectivity for Packet Data
`Users,” March 2007, which is publicly available.
`For CPC, the enabled downlink and uplink subframes may
`be de?ned by the parameters given in Table 3. CPC supports
`a transmission time interval (TTI) of 2 ms or 10 ms. The third
`column of Table 3 gives possible values for the CPC param
`eters assuming a TTl of 2 ms.
`
`TABLE 3
`
`Parameter
`
`Description
`
`Value
`
`UE DTX
`cycle 1
`
`20
`
`Duration between the enabled uplink
`subframes when the UE has
`transmitted recently
`
`1, 4, 5, 8, 10, 16
`or 20 subframes
`
`Carry pilot and SFN
`
`Primary Common Control
`P-CCPCH
`Physical Channel
`(Downlink)
`Carry signaling for packets sent
`Shared Control Channel
`HSDPA HS-SCCH
`on the HS-PDSCH
`for HS-DSCH
`(Downlink)
`Carry packets sent on the
`HS-PDSCH High Speed Physical
`downlink for different UEs
`(Downlink)
`Downlink Shared Channel
`HS-DPCCH Dedicated Physical Control Carry ACK/NAK for packets
`(Uplink)
`Channel for HS-DSCH
`sent on the HS-PDSCH and CQI
`HSUPA E-DPCCH E-DCH Dedicated Physical Carry signaling for the
`(Uplink)
`Control Channel
`E-DPDCH
`E-DPDCH E-DCH Dedicated Physical Carry packets sent on the uplink by
`(Uplink)
`Data Channel
`a UE
`E-HICH
`E-DCH Hybrid ARQ
`Carry ACK/NAK for packets
`(Downlink)
`Indicator Channel
`sent on the E-DPDCH
`
`FIG. 5 shows some of the physical channels used for
`HSDPA and HSUPA in UMTS. The P-CCPCH is used
`directly as timing reference for the downlink physical chan
`nels and is used indirectly as timing reference for the uplink
`physical channels. For HSDPA, the subframes of the HS
`SCCH are time-aligned with the P-CCPCH. The subframes of
`the HS-PDSCH are delayed by "cHS_PDSCH:2TSZ0t from the
`subframes of the HS-SCCH. The subframes of the
`HS-DPCCH are delayed by 7.5 slots from the subframes of
`the HS-PDSCH. For HSUPA, the frame timing of the
`E-HICH is offset by TEHICH,” chips from the frame timing of
`the P-CCPCH, where 'EEHICH,” is de?ned in 3GPP TS 25.211.
`The E-DPCCH and E-DPDCH are time-aligned and their
`frame timing is offset by "c DPCHW+1024 chips from the frame
`timing of the P-CCPCH, where "cDPCH,n:256 n and n can
`range from 0 to 149. The frame timing of the downlink and
`uplink physical channels is described in 3GPP TS 25.21 1. For
`simplicity, other physical channels such as grant channels are
`not shown in FIG. 5.
`3GPP Release 7 supports CPC, which allows a UE to
`operate with DTX and/or DRX in order to conserve battery
`power. For DTX, the UE may be assigned certain enabled
`uplink subframes in which the UE can send uplink transmis
`sion to a Node B. The enabled uplink subframes may be
`de?ned by an uplink DPCCH burst pattern. For DRX, the UE
`may be assigned certain enabled downlink subframes in
`which the Node B can send downlink transmission to the UE.
`The enabled downlink subframes may also be referred to as
`
`45
`
`50
`
`55
`
`60
`
`65
`
`TABLE 3-continued
`
`Parameter
`
`Description
`
`Value
`
`UE DTX
`cycle 2
`
`UE DRX cycle
`
`UE DPCCH
`burst 1
`UE DPCCH
`burst 2
`UE DTX DRX
`offset
`
`Duration between the enabled uplink
`subframes when the UE has not
`transmitted recently
`Duration between the enabled
`downlink subframes
`Number of enabled uplink subframes
`for UE DTX cycle 1
`Number of enabled uplink subframes
`for UE DTX cycle 2
`UE-speci?c offset ofthe enabled
`subframes from a reference time.
`
`4, 5, 8, 10, 16 or
`20 subframes
`
`1, 4, 5, 8, 10, 16
`or 20 subframes
`1, 2 or 5
`subframes
`1, 2 or 5
`subframes
`0 to 159
`subframes
`
`FIG. 5 shows an example con?guration of DTX and DRX
`for a UE in CPC. In this example, the UE is con?gured as
`follows:
`UE DTX cycle 1:UE DRX cycle:4 subframes,
`UE DTX cycle 2:8 subframes, and
`UE DPCCH burst 1:UE DPCCH burst 2:1 subframe.
`For the CPC con?guration given above, the enabled down
`link subframes are spaced apart by four subframes and are
`shown with gray shading. The enabled uplink subframes are
`also spaced apart by four subframes and are shown with gray
`shading. The alignment of the enabled downlink subframes
`and the enabled uplink subframes is dependent on 'CDPCH’W
`The enabled downlink and uplink subframes may be aligned
`in time in order to extend possible sleep time for the UE. As
`shown in FIG. 5, the UE may be awake during the enabled
`
`15
`
`

`

`US 8,094,554 B2
`
`7
`doWnlink and uplink subframes and may go to sleep during
`the idle times between the enabled subframes. FIG. 5 assumes
`that the UE does not transmit data on the uplink and hence
`does not need to monitor the E-HICH forACK/NAK. The idle
`times may also be referred to as sleep times, DTX/DRX
`times, etc.
`A UE may operate in the compressed mode and may be
`assigned a transmission gap pattern sequence. The UE may
`not receive or send data during the transmission gaps. The UE
`may also operate in the CPC mode and may be assigned
`certain enabled doWnlink and uplink subframes for DTX and
`DRX operation. The UE may not receive or send data during
`the non-enabled subframes. When the UE operates in both
`modes, the transmission gaps in the compressed mode may
`impact the operation of the CPC mode. It may thus be desir
`able to support inter-Working betWeen the compressed mode
`and the CPC mode.
`In an aspect, the transmission gaps in the compressed mode
`may be de?ned to be time aligned (or to coincide) With the
`idle times in the CPC mode. The parameters for the tWo
`modes may be selected to achieve the folloWing:
`1. The periodicity of the transmission gaps is an integer
`multiple of the periodicities of the enabled doWnlink and
`uplink subframes, and
`2. The transmission gaps start during the idle times for
`CPC.
`The transmission gap pattern sequence may be de?ned to
`include only transmission gap pattern 1 in FIG. 3. For condi
`tion 1 above, TGPLl may be de?ned to be an integer multiple
`of UE DTX cycle 1 . For condition 2, TGCFN and TGSN may
`be de?ned to take into account the UE DTX DRX offset.
`Furthermore, TGL1 may be de?ned as a function of the idle
`times, Which may be dependent on 'CDPCHM. If a second trans
`mission gap is included in transmission gap pattern 1, then
`TGD and TGL2 may be de?ned as a function of "cDPCHm, UE
`DTX cycle 1, and UE DTX DRX offset such that the second
`transmission gap coincides With the idle times for CPC.
`A transmission gap in the compressed mode may have a
`duration of 1 to 14 slots. An idle time in the CPC mode may
`be shorter than the transmission gap. In one design, the trans
`mission gap may blank out enabled subframes that fall Within
`the transmission gap. In this design, data is not transmitted in
`the enabled subframes that fall Within the transmission gap.
`For a CPC con?guration With UE DTX cycle 1 and UE
`DRX cycle both equal to four subframes, as shoWn in FIG. 5,
`45
`it can be shoWn that the idle times can vary betWeen 1.5 to 4.5
`slots, depending on 'CDPCH’W These idle times are approxi
`mate and assume transmission and reception in all enabled
`subframes. To obtain a longer idle time, the UE may skip one
`aWake period, in Which case the idle time may be extended to
`betWeen 13.5 to 16.5 slots. The extended idle time approxi
`mately matches the longest possible transmission gap dura
`tion. For a CPC con?guration With UE DTX cycle 1 and UE
`DRX cycle both equal to eight subframes, it canbe shoWn that
`the idle times can vary betWeen 7 to 11 slots in one cycle,
`depending on 'CDPCH’W HoWever, the idle time of 7 slots is
`divided into tWo lengths of 1.5 and 5.5 slots, and the idle time
`of 11 slots is divided into tWo lengths of 4.5 and 6.5 slots. If
`the UE skips one aWake period, then the idle time may be
`extended to betWeen 15 to 16.5 slots, Which is longer than the
`longest possible transmission gap duration. In general, an
`extended idle time matching or exceeding a transmission gap
`may be obtained by skipping a suf?cient number of aWake
`periods.
`The UE and Node B may skip transmissions in enabled
`subframes that fall Within transmission gaps. On the doWn
`link, the UE may not be listening during the transmission
`
`55
`
`50
`
`60
`
`65
`
`20
`
`25
`
`30
`
`35
`
`40
`
`8
`gaps, and the Node B may avoid sending data to the UE during
`the transmission gaps. On the uplink, the UE may avoid
`sending transmission during transm