(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(19) World Intellectual Property Organization
`International Bureau
`
`(43) International Publication Date
`21 July 2011 (21.07.2011)
`
`(51) International Patent Classification:
`H04L 5/00 (2006.0 1)
`H04B 1/69 (20 11.0 1)
`
`(21) International Application Number:
`
`(22) International Filing Date:
`
`(25) Filing Language:
`
`(26) Publication Language:
`
`PCT/SE201 1/050052
`
`18 January 201 1 (18.01 .201 1)
`
`English
`
`English
`
`(30) Priority Data:
`61/295,885
`
`18 January 2010 (18.01 .2010)
`
`US
`
`(71) Applicant (for all designated States except US): TELE-
`FONAKTIEBOLAGET
`LM ERICSSON
`(publ)
`[SE/SE]; SE-164 83 Stockholm (SE).
`
`(10) International Publication Number
`_
`.
`.
`.
`.
`.
`WO 2011/087448 Al
`
`AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ,
`CA, CH, CL, 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, J , 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, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD,
`SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR,
`TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
`
`(84) Designated States (unless otherwise indicated, for every
`kind of regional protection available): ARIPO (BW, GH,
`GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG,
`ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ,
`TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK,
`EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU,
`LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK,
`SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ,
`GW, ML, MR, NE, SN, TD, TG).
`
`— of inventorship (Rule 4.1 7(iv))
`
`(72) Inventors; and
`(for US only): BALDEMAIR,
`(75) Inventors/ Applicants
`Robert
`[AT/SE]; Angkarrsgatan 3, SE-171 70 Solna Declarations under Rule 4.17 :
`(SE). ASTELY, David [SE/SE]; Stobaeusvagen
`22,
`SE-168 56 Bromma (SE). GERSTENBERGER, Dirk
`[DE/SE]; Birger Jarlsgatan 113 C, SE-1 13 56 Stockholm Published:
`(SE). LARSSON, Daniel [SE/SE]; Storgatan 50, SE-171 — with international search report (Art. 21(3))
`52 Solna (SE). PARKVALL, Stefan [SE/SE]; Vastman-
`— before the expiration of
`the time limit for amending the
`nagatan 53, SE-1 13 25 Stockholm (SE).
`claims and to be republished in the event of receipt of
`amendments (Rule 48.2(h))
`
`(74) Agent: VALEA AB; Box 7086, SE-1 03 87 Stockholm
`(SE).
`
`(81) Designated States (unless otherwise indicated, for every
`kind of national protection available): AE, AG, AL, AM,
`
`(54) Title: RADIO BASE STATION AND USER EQUIPMENT AND METHODS THEREIN
`
`Fig. 11
`
`<0
`
`0!-
`
`(57) Abstract: Embodiments herein relate to a method in a user equipment (10) for transmitting uplink control information in
`time slots in a subframe over a radio channel to a radio base station. The radio channel is arranged to carry uplink control informa-
`r
`tion and the user equipment and radio base station are comprised in a radio communications network. The uplink control in forma
`00 tion is comprised in a block of bits. The user equipment maps the block of bits to a sequence of complex valued modulation sym
`bols. The user equipment also block spreads the sequence of complex valued modulation symbols across Discrete Fourier Trans-
`form Spread - Orthogonal Frequency Division Multiplexing (DFTS-OFDM) symbols. This is performed by applying a spreading
`, sequence to the sequence of complex valued modulation symbols, to achieve a block spread sequence of complex valued modula-
`tion symbols. The user equipment
`further transforms the block-spread sequence of complex valued modulation symbols per
`DFTS-OFDM symbol. This is performed by applying a matrix that depends on a DFTS- OFDM symbol index and/or slot index to
`the block-spread sequence of complex valued modulation symbols. The user equipment also transmits the block spread sequence
`of complex valued modulation symbols that has been transformed over the radio channel to the radio base station.
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`RADIO BASE STATION AND USER EQUIPMENT AND METHODS THEREIN
`
`TECHNICAL FIELD
`
`Embodiments herein relate to a radio base station, a user equipment and methods
`
`therein. In particular, embodiments herein relate to transmission of uplink control
`
`information comprised in a block of bits over a radio channel to the radio base station.
`
`BACKGROUND
`
`In today's radio communications networks a number of different technologies are
`
`used, such as Long Term Evolution (LTE), LTE-Advanced, 3rd Generation Partnership
`
`Project (3GPP) Wideband Code Division Multiple Access (WCDMA), Global System for
`
`Mobile communications/Enhanced Data rate for GSM Evolution (GSM/EDGE), Worldwide
`
`Interoperability for Microwave Access (WiMax), and Ultra Mobile Broadband (UMB), just
`
`to mention a few.
`
`Long Term Evolution (LTE) is a project within the 3rd Generation Partnership
`
`Project (3GPP) to evolve the WCDMA standard towards the fourth generation of mobile
`
`telecommunication networks.
`
`In comparisons with WCDMA, LTE provides increased
`
`capacity, much higher data peak rates and significantly improved latency numbers. For
`
`example, the LTE specifications support downlink data peak rates up to 300 Mbps, uplink
`
`data peak rates of up to 75 Mbit/s and radio access network round-trip times of less than
`
`10
`
`s. In addition, LTE supports scalable carrier bandwidths from 20 MHz down to 1.4
`
`MHz and supports both Frequency Division Duplex (FDD) and Time Division Duplex
`
`(TDD) operation.
`
`LTE is a Frequency Division Multiplexing technology wherein Orthogonal
`
`Frequency Division Multiplexing (OFDM) is used in a downlink (DL) transmission from a
`
`radio base station to a user equipment. Single Carrier - Frequency Domain Multiple
`
`Access (SC-FDMA) is used in an uplink (UL) transmission from the user equipment to the
`
`radio base station. Services in LTE are supported in the packet switched domain. The SC-
`
`FDMA used in the uplink is also referred to as Discrete Fourier Transform Spread (DFTS)
`
`- OFDM.
`
`The basic LTE downlink physical resource may thus be seen as a time-frequency
`
`grid as illustrated in Fig. 1, where each Resource Element (RE) corresponds to one
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`OFDM subcarrier during one OFDM symbol interval. A symbol interval comprises a cyclic
`
`prefix (cp), which cp is a prefixing of a symbol with a repetition of the end of the symbol to
`
`act as a guard band between symbols and/or facilitate frequency domain processing.
`Frequencies f or subcarriers having a subcarrier spacing D
`and symbols are defined along an x-axis.
`
`are defined along an z-axis
`
`In the time domain, LTE downlink transmissions are organized into radio frames of
`
`10 ms, each radio frame comprising ten equally-sized subframes, #0 - #9, each with a
`
`1 s of length in time as shown in Fig.2. Furthermore, the resource allocation in
`
`LTE is typically described in terms of resource blocks, where a resource block
`
`corresponds to one slot of 0.5 ms in the time domain and 12 subcarriers in the frequency
`
`domain. Resource blocks are numbered in the frequency domain, starting with resource
`
`block 0 from one end of the system bandwidth.
`
`Downlink transmissions are dynamically scheduled, i.e., in each subframe the
`
`base station or radio base station transmits control information about to which user
`
`equipments or terminals data is transmitted and upon which resource blocks the data is
`
`transmitted, in the current downlink subframe. This control signaling is typically
`
`transmitted in the first 1, 2 , 3 or 4 OFDM symbols in each subframe. A downlink system
`
`with 3 OFDM symbols used for control signaling is illustrated in Fig. 3 and denoted as
`
`control region. The resource elements used for control signaling are indicated with wave-
`
`formed lines and resource elements used for reference symbols are indicated with
`
`diagonal
`
`lines. Frequencies f or subcarriers are defined along an z-axis and symbols are
`
`defined along an x-axis.
`
`LTE uses hybrid-Automatic Repeat Request (ARQ), where, after receiving
`
`downlink data in a subframe, the user equipment attempts to decode it and reports to the
`
`radio base station using uplink control signaling whether the decoding was successful by
`
`sending an Acknowledgement (ACK) if successful decoding or a "non Acknowledgement"
`
`(NACK) if not successful decoding. In case of an unsuccessful decoding attempt, the
`
`radio base station may retransmit the erroneous data.
`
`Uplink control signaling from the user equipment or terminal to the base station or
`
`radio base station comprises
`
`hybrid-ARQ acknowledgements for received downlink data;
`
`user equipment or terminal reports related to the downlink channel
`
`conditions, used as assistance for the downlink scheduling;
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`scheduling requests, indicating that a user equipment or terminal needs
`
`uplink resources for uplink data transmissions.
`
`Uplink control information may be transmitted in two different ways:
`
`·
`
`on the Physical Uplink shared Channel (PUSCH). If the user equipment or
`
`terminal has been assigned resources for data transmission in the current
`
`subframe, uplink control information, including hybrid-ARQ
`
`acknowledgements,
`
`is transmitted together with data on the PUSCH.
`
`on the Physical Uplink Control Channel (PUCCH). If the user equipment or
`
`terminal has not been assigned resources for data transmission in the
`
`current subframe, uplink control information is transmitted separately on
`
`PUCCH, using resource blocks specifically assigned for that purpose.
`
`Herein the focus is on the latter case, i.e. where Layer1/Layer2 (L1/L2) control
`
`information, exemplified by channel-status reports, hybrid-ARQ acknowledgements, and
`
`scheduling requests, is transmitted in uplink resources, i.e. in the resource blocks,
`
`specifically assigned for uplink L1/L2 control information on the Physical Uplink Control
`
`Channel (PUCCH). Layer 1 comprises a physical layer and Layer 2 comprises the data
`
`link layer. As illustrated in Fig.4, PUCCH resources 4 1,42 are located at the edges of the
`
`total available cell uplink system bandwidth. Each such resource comprises twelve
`
`"subcarriers", i.e. it comprises one resource block, within each of the two slots of an uplink
`
`subframe. In order to provide frequency diversity, these frequency resources are
`
`frequency hopping on the slot boundary, as illustrated by the arrow, i.e. within a subframe
`
`there is one "resource" 4 1 comprising 12 subcarriers at the upper part of the spectrum
`
`within a first slot of the subframe and an equally sized resource 42 at the lower part of the
`
`spectrum during a second slot of the subframe or vice versa. If more resources are
`
`needed for the uplink L1/L2 control signaling, e.g. in case of very large overall
`
`transmission bandwidth supporting a large number of users, additional resource blocks
`
`may be assigned next to the previously assigned resource blocks. Frequencies f or
`
`subcarriers are defined along an z-axis and symbols are defined along an x-axis.
`
`The reasons for locating the PUCCH resources at the edges of the overall
`
`available spectrum are:
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`Together with the frequency hopping described above, the location of the
`
`PUCCH resources at the edges of the overall available spectrum maximizes the
`
`frequency diversity experienced by the control signaling.
`
`Assigning uplink resources for the PUCCH at other positions within the
`
`spectrum, i.e. not at the edges, would have fragmented the uplink spectrum,
`
`making it impossible to assign very wide transmission bandwidths to single mobile
`
`user equipment or terminal and still retain the single-carrier property of the uplink
`
`transmission.
`
`The bandwidth of one resource block during one subframe is too large for the
`
`control signaling needs of a single user equipment or terminal. Therefore, to efficiently
`
`exploit the resources set aside for control signaling, multiple user equipments or terminals
`
`may share the same resource block. This is done by assigning the different user
`
`equipments or terminals different orthogonal phase rotations of a cell-specific length-12
`
`frequency-domain sequence.
`
`The resource used by a PUCCH is therefore not only specified in the time-
`
`frequency domain by the resource-block pair, but also by the phase rotation applied.
`
`Similarly to the case of reference signals, there are up to twelve different phase rotations
`
`specified, providing up to twelve different orthogonal sequences from each cell-specific
`
`sequence. However, in the case of frequency-selective channels, not all the twelve phase
`
`rotations may be used if orthogonality is to be retained. Typically, up to six rotations are
`
`considered usable in a cell.
`
`As mentioned above, uplink L1/L2 control signaling includes hybrid-ARQ
`
`acknowledgements, channel-status reports and scheduling requests. Different
`
`combinations of these types of messages are possible, using one of two available
`
`PUCCH formats, capable of carrying different number of bits.
`
`PUCCH format 1.There are actually three formats, 1, 1a, and 1b in the LTE
`
`specifications, although herein they are all referred to as format 1 for simplicity.
`
`PUCCH format 1 is used for hybrid-ARQ acknowledgements and scheduling requests. It
`
`is capable of carrying up to two information bits in addition to Discontinuous Transmission
`
`(DTX). If no information transmission was detected in the downlink, no acknowledgement
`
`is generated, also known as DTX. Hence, there are 3 or 5 different combinations,
`
`depending on whether MIMO was used on the downlink or not. This is illustrated in Fig. 5 .
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`In col 5 1 the combination index is denoted, in col 52 the ARQ information sent when no
`
`MIMO is used is disclosed, and in col 53 the ARQ information when MIMO is used when a
`
`first transport block and a second transport block are received is shown.
`
`PUCCH format 1 uses the same structure in the two slots of a subframe, as
`
`illustrated in Fig.6. For transmission of a hybrid-ARQ acknowledgement (ACK), the single
`
`hybrid-ARQ acknowledgement bit is used to generate a Binary Phase-Shift Keying
`
`(BPSK) symbol, in case of downlink spatial multiplexing the two acknowledgement bits
`
`are used to generate a Quadrature Phase Shift Keying (QPSK) symbol. For a scheduling
`
`request, on the other hand, the BPSK/QPSK symbol is replaced by a constellation point
`
`treated as negative acknowledgement at the radio base station or evolved NodeB
`
`(eNodeB). Each BPSK/QPSK symbol is multiplied with a length-12 phase rotated
`
`sequence. These are then weighted with a length-4 sequence before transformed in an
`
`IFFT process. Phase shifts vary on SC-FDMA or DFTS-OFDM symbol level. The
`
`reference symbols (RS) are weighted with a length-3 sequence. The modulation symbol is
`
`then used to generate the signal to be transmitted in each of the two PUCCH slots. BPSK
`
`modulation symbols, QPSK modulation symbols, and complex valued modulation symbols
`
`are examples of modulation symbols.
`
`For PUCCH format 2 , there are also three variants in the LTE specifications,
`
`formats 2 , 2a and 2b, where the last two formats are used for simultaneous transmission
`
`of hybrid-ARQ acknowledgements as discussed later in this section. However, for
`
`simplicity, they are all referred to as format 2 herein.
`
`Channel-status reports are used to provide the radio base station or eNodeB with
`
`an estimate of the channel properties at the user equipment or terminal
`
`in order to aid
`
`channel-dependent scheduling. A channel-status report comprises multiple bits per
`
`subframe. PUCCH format 1, which is capable of at most two bits of information per
`
`subframe, can obviously not be used for this purpose. Transmission of channel-status
`
`reports on the PUCCH is instead handled by PUCCH format 2 , which is capable of
`
`multiple information bits per subframe.
`
`PUCCH format 2 , illustrated for normal cyclic prefix in Fig. 7 , is based on a phase rotation
`
`of the same cell-specific sequence as format 1, i.e. lenghth-12 phase rotated sequence
`
`that is varying per SC-FDMA or DFTS-OFDM symbol. The information bits are block
`
`coded, QPSK modulated, each QPSK symbol b0-b9 from the coding is multiplied by the
`
`phase rotated length-12 sequence and all SC-FDMA or DFTS-OFDM symbols are finally
`
`IFFT processed before transmitted.
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`In order to meet the upcoming International Mobile Telecommunications (IMT) -
`
`Advanced requirements, 3GPP is currently standardizing LTE Release 10 also known as
`
`LTE-Advanced. One property of Release 10 is the support of bandwidths larger than 20
`
`MHz while still providing backwards compatibility with Release 8 . This is achieved by
`
`aggregating multiple component carriers, each of which can be Release 8 compatible, to
`
`form a larger overall bandwidth to a Release 10 user equipment. This is illustrated in Fig.
`
`8 , where five 20 MHz are aggregated into 100 MHz.
`
`In essence, each of the component carriers in Fig. 8 is separately processed. For
`
`example, hybrid ARQ is operated separately on each component carrier, as illustrated in
`
`Fig.9. For the operation of hybrid-ARQ, acknowledgements informing the transmitter on
`
`whether the reception of a transport block was successful or not is required. A
`
`straightforward way of realizing this is to transmit multiple acknowledgement messages,
`
`one per component carrier. In case of spatial multiplexing, an acknowledgement message
`
`would correspond to two bits as there are two transport blocks on a component carrier in
`
`this case already in the first release of LTE. In absence of spatial multiplexing, an
`
`acknowledgement message is a single bit as there is only a single transport block per
`
`component carrier. Each flow F 1-Fi illustrates a data flow to the same user. Radio Link
`
`control (RLC) for each received data flow is performed on the RLC layer. In the Medium
`
`Access Control (MAC) layer MAC multiplexing and HARQ processing is performed on the
`
`data flow. In the physical (PHY) layer the coding and OFDM modulation of the data flow is
`
`performed.
`
`Transmitting multiple hybrid-ARQ acknowledgement messages, one per
`
`component carrier, may in some situations be troublesome.
`
`If the current LTE Frequency
`
`Division Multiplex (FDM) uplink control signaling structures are to be reused, at most two
`
`bits of information may be sent back to the radio base station or eNodeB using PUCCH
`
`. O
`
`format
`
`ne possibility is to bundle multiple acknowledgement bits into a single message.
`
`For example, ACK could be signaled only if all transport blocks on all component carriers
`
`are correctly received in a given subframe, otherwise a NACK is fed back. A drawback of
`
`this is that some transport blocks might be retransmitted even if they were correctly
`
`received, which could reduce performance of the system.
`
`Introducing a multi-bit hybrid-ARQ acknowledgement
`
`format is an alternative
`
`solution. However, in case of multiple downlink component carriers, the number of
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`acknowledgement bits in the uplink may become quite large. For example, with five
`
`component carriers, each using MIMO, there are 55 different combinations, keeping in
`
`mind that the DTX is preferably accounted for as well, requiring at least log2(5 ) 11.6 bits.
`The situation can get even worse in Time Division Duplex (TDD), where multiple downlink
`
`subframes may need to be acknowledged in a single uplink subframe. For example, in a
`
`TDD configuration with 4 downlink subframes and 1 uplink subframe per 5 ms, there are
`
`55'4 combinations, corresponding to more than 46 bits of information.
`
`Currently, there is no PUCCH format in LTE specified capable of carrying such a
`
`large number of bits.
`
`SUMMARY
`
`An object of embodiments herein is to provide a mechanism that enables high
`
`transmission performance in a radio communications network in an efficient manner.
`
`According to a first aspect of embodiments herein the object is achieved by a
`
`method in a user equipment for transmitting uplink control information in time slots in a
`
`subframe over a radio channel to a radio base station. The radio channel is arranged to
`
`carry uplink control information and the user equipment and radio base station are
`
`comprised in a radio communications network. The uplink control information is comprised
`
`in a block of bits.
`
`The user equipment maps the block of bits to a sequence of complex valued
`
`modulation symbols. The user equipment also block spreads the sequence of complex
`
`valued modulation symbols across Discrete Fourier Transform Spread - Orthogonal
`
`Frequency Division Multiplexing (DFTS-OFDM) symbols. This is performed by applying a
`
`spreading sequence to the sequence of complex valued modulation symbols, to achieve a
`
`block spread sequence of complex valued modulation symbols. The user equipment
`
`further transforms the block-spread sequence of complex valued modulation symbols per
`
`DFTS-OFDM symbol. This is performed by applying a matrix that depends on a DFTS-
`
`OFDM symbol index and/or slot index to the block-spread sequence of complex valued
`
`modulation symbols. The user equipment also transmits the block spread sequence of
`
`complex valued modulation symbols that has been transformed over the radio channel to
`
`the radio base station.
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`According to another aspect of embodiments herein the object is achieved by a
`
`user equipment for transmitting uplink control information in time slots in a subframe over
`
`a radio channel to a radio base station. The radio channel is arranged to carry uplink
`
`control information, and the uplink control information is comprised in a block of bits.
`
`The user equipment comprises a mapping circuit configured to map the block of
`
`bits to a sequence of complex valued modulation symbols. Also, the user equipment
`
`comprises a block spreading circuit configured to block spread the sequence of complex
`
`valued modulation symbols across DFTS-OFDM symbols by applying a spreading
`
`sequence to the sequence of complex valued modulation symbols, to achieve a block
`
`spread sequence of complex valued modulation symbols. Furthermore, the user
`
`equipment comprises a transforming circuit configured to transform the block-spread
`
`sequence of complex valued modulation symbols per DFTS-OFDM symbol. This is done
`
`by applying a matrix that depends on a DFTS-OFDM symbol index and/or slot index to the
`
`block-spread sequence of complex valued modulation symbols. The user equipment also
`
`comprises a transmitter configured to transmit the block spread sequence of complex
`
`valued modulation symbols that has been transformed over the radio channel to the radio
`
`base station.
`
`According to another aspect of embodiments herein the object is achieved by a
`
`method in a radio base station for receiving uplink control information in time slots in a
`
`subframe over a radio channel from a user equipment. The radio channel is arranged to
`
`carry uplink control information and the uplink control information is comprised in a block
`
`of bits. The user equipment and radio base station are comprised in a radio
`
`communications network.
`
`The radio base station receives a sequence of complex valued modulation
`
`symbols. The radio base station also OFDM demodulates the sequence of complex
`
`valued modulation symbols. The radio base station also transforms, per DFTS-OFDM
`
`symbol, the sequence of complex valued modulation symbols that has been OFDM
`
`demodulated by applying a matrix that depends on a DFTS-OFDM symbol index and/or
`
`slot index to the OFDM demodulated sequence of complex valued modulation symbols.
`
`The radio base station further despreads the sequence of complex valued
`
`modulation symbols that has been OFDM demodulated and transformed with a
`
`despreading sequence. The radio base station also maps the despread sequence of
`
`complex valued modulation symbols that has been OFDM demodulated and transformed,
`
`to the block of bits.
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`According to another aspect of embodiments herein the object is achieved by a
`
`radio base station for receiving uplink control information in time slots in a subframe over
`
`a radio channel from a user equipment. The radio channel is arranged to carry uplink
`
`control information, and the uplink control information is comprised in a block of bits. The
`
`radio base station comprises a receiver configured to receive a sequence of complex
`
`valued modulation symbols. The radio base station also comprises an OFDM
`
`demodulating circuit configured to OFDM demodulate the sequence of complex valued
`
`modulation symbols. The radio base station further comprises a transforming circuit
`
`configured to transform, per DFTS-OFDM symbol, the sequence of complex valued
`
`modulation symbols that has been OFDM demodulated by applying a matrix that depends
`
`on a DFTS-OFDM symbol index and/or slot index to the OFDM demodulated sequence of
`
`complex valued modulation symbols. The radio base station also comprises a block
`
`despreading circuit configured to block despread the sequence of complex valued
`
`modulation symbols that has been OFDM demodulated and transformed, with a
`
`despreading sequence. Furthermore, the radio base station comprises a mapping circuit
`
`configured to map the despread sequence of complex valued modulation symbols that
`
`has been OFDM demodulated and transformed, to the block of bits.
`
`Thus, the inter-cell interference is reduced since the matrix or matrices transforms
`
`the block spread sequence of complex valued modulation symbols per DFTS-OFDM
`
`symbol and thereby increases interference suppression.
`
`According to another aspect of embodiments herein the object is achieved by a
`
`method in a terminal for transmitting uplink control information in a slot in a subframe over
`
`a channel to a base station in a wireless communication system. The uplink control
`
`information is comprised in a code word. The terminal maps the code word to modulation
`
`symbols. The terminal block spreads the modulation symbols across DFTS- OFDM
`
`symbols by repeating the modulation symbols for each DFTS-OFDM symbol and applying
`
`a block spreading sequence of weight factors to the repeated modulation symbols to
`
`achieve a respective weighted copy of the modulation symbols for each DFTS-OFDM
`
`symbol. The terminal then transforms, for each DFTS-OFDM symbol, the respective
`
`weighted copy of the modulation symbols by applying a matrix that depends on a DFTS-
`
`OFDM symbol index and/or slot index to the respective weighted copy of the modulation
`
`symbols. The terminal then transmits, on or within each DFTS-OFDM symbol, the
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`respective weighted copy of the modulation symbols that has been transformed to the
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`base station.
`
`In some embodiments herein, a transmission format is provided wherein a code
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`word or block of bits corresponding to uplink control information from all configured or
`
`activated component carriers of a single user is mapped to modulation symbols such as a
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`sequence of complex valued modulation symbols and block spread over DFTS-OFDM
`
`symbols using a spreading sequence. The symbol sequence within one DFTS-OFDM
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`symbol
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`is then transformed and transmitted within the one DFTS-OFDM symbol.
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`Multiplexing of users is enabled with block spreading, i.e. the same signal or symbol
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`sequence is spread across all DFTS-OFDM symbols within one slot or subframe and the
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`transformation per DFTS-OFDM symbol reduces the inter-cell
`
`interference.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`Embodiments will now be described in more detail in relation to the enclosed
`drawings, in which:
`Fig. 1
`is a block diagram depicting resources in a frequency-time grid,
`
`Fig. 2
`
`Fig. 3
`
`Fig. 4
`
`Fig. 5
`
`Fig. 6
`
`Fig. 7
`
`Fig. 8
`
`Fig. 9
`
`Fig. 10
`
`Fig. 11
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`Fig. 12
`
`Fig. 13
`
`Fig. 14
`
`Fig. 15
`
`Fig. 16
`
`is a block diagram depicting a LTE time-domain structure of a radio frame,
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`is a block diagram depicting symbols distributed over a downlink subframe,
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`is a block diagram depicting Uplink L1/L2 control signalling transmission on
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`PUCCH,
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`is a table defining combinations of HARQ information,
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`is a block diagram of PUCCH format 1 with normal length of cyclic prefix,
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`is a block diagram of PUCCH format 2 with normal length of cyclic prefix,
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`is a block diagram depicting carrier aggregation,
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`is a block diagram depicting RLC/MAC and PHY layers for carrier
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`aggregation,
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`is a block diagram depicting a radio communications network,
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`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`Fig 17
`Fig 18
`Fig 19
`Fig 20
`
`Fig 2 1
`Fig 22
`Fig 23
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a block diagram depicting a process in a user equipment,
`
`is a schematic flowchart of a process in a user equipment,
`
`is a block diagram depicting a user equipment,
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`is a schematic flowchart of a process in a radio base station, and
`
`is a block diagram depicting a radio base station.
`
`DETAILED DESCRIPTION
`
`Fig. 10 discloses a schematic radio communication network, also referred to as a
`
`wireless communication system, according to a radio access technology such as Long
`
`Term Evolution (LTE), LTE-Advanced, 3rd Generation Partnership Project (3GPP)
`
`Wideband Code Division Multiple Access (WCDMA), Global System for Mobile
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`communications/Enhanced Data rate for GSM Evolution (GSM/EDGE), Worldwide
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`Interoperability for Microwave Access (WiMax), or Ultra Mobile Broadband (UMB), just to
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`mention a few possible implementations.
`The radio communications network comprises a user equipment 10, also referred
`
`to as a terminal 10, and a radio base station 12. The radio base station 12 serves the
`
`user equipment 10 in a cell 14 by providing radio coverage over a geographical area. The
`
`radio base station 2 is transmitting data in a downlink (DL) transmission to the user
`
`equipment 10 and the user equipment 10 is transmitting data in an uplink (UL)
`
`transmission to the radio base station 12. The UL transmission may efficiently be
`
`generated by the use of an Inverse Fast Fourier Transform (IFFT) process at the user
`
`equipment 10 and then demodulated at the radio base station 12 by the use of a Fast
`
`Fourier Transform (FFT) process.
`
`It should here be noted that the radio base station 2 may also be referred to as
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`e.g. a NodeB, an evolved Node B (eNB, eNode B), a base station, a base transceiver
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`station, Access Point Base Station, base station router, or any other network unit capable
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`of communicating with a user equipment within the cell served by the radio base station
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`2 , depending e.g. on the radio access technology and terminology used. The user
`
`equipment
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`0 may be represented by a terminal e.g. a wireless communication user
`
`equipment, a mobile cellular phone, a Personal Digital Assistant (PDA), a wireless
`
`platform, a laptop, a computer or any other kind of device capable to communicate
`
`wirelessly with the radio base station 12.
`
`Ericsson Exhibit 1130
`ERICSSON v. ETRI
`
`

`

`The radio base station 12 transmits control information about to which user
`
`equipment data is transmitted and upon which resource blocks the data is transmitted.
`
`The user equipment
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`0 tries to decode the control information and data and reports to the
`
`radio base station 12 using uplink control signaling whether decoding of data was
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`successful
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`in which case an Acknowledgement
`
`(ACK) is transmitted, or not successful, in
`
`which case a Non-Acknowledgement
`
`(NACK, NAK) is transmitted.
`
`According to embodiments herein the user equipment 10 is arranged to transmit a
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`block of bits corresponding to the uplink control
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`information in slots, i e timeslots, in a
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`subframe over a channel, i e a radio channel, to the radio base station 12. The block of
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`bits may comprise ACK and/or NACK, jointly encoded. The channel may be a Physical
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`Uplink Control Channel (PUCCH), which is a radio channel arranged to carry uplink
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`control
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`information. The block of bits may also be referred to as number of bits, code
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`word, encoded bits, information bits, an ACK/NACK sequence or similar.
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`The user equipment 10 maps the block of bits to modulation symbols, i e to a
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`sequence of complex valued modulation symbols. This mapping may be a QPSK
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`mapping wherein the resulting QPSK modulation symbol
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`is complex-valued, where one o