throbber
Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 1 of 22 PageID #: 33
`
`Exhibit 1
`
`
`
`
`
`
`
`
`

`

`(12) United States Patent
`Futagi et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,149,727 B2
`Apr. 3, 2012
`
`US008149727B2
`
`(54)
`
`(75)
`
`(73)
`(*)
`
`(21)
`(22)
`(86)
`
`(87)
`
`(65)
`
`RADIO TRANSMISSION APPARATUS, AND
`RADIO TRANSMISSION METHOD
`
`Inventors: Sadaki Futagi, Ishikawa (JP); Daichi
`Imamura, Kanagawa (JP); Atsushi
`Matsumoto, Ishikawa (JP): Takashi
`Iwai, Ishikawa (JP)
`Assignee: Panasonic Corporation, Osaka (JP)
`Notice:
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 633 days.
`12/088,641
`
`Appl. No.:
`
`PCT Fled:
`
`Sep. 29, 2006
`
`PCT/UP2006/319550
`
`PCT NO.:
`S371 (c)(1),
`(2), (4) Date:
`PCT Pub. No.: WO2OOTAO37412
`PCT Pub. Date: Apr. 5, 2007
`
`Mar. 28, 2008
`
`Prior Publication Data
`US 2010/O188984 A1
`Jul. 29, 2010
`
`(30)
`Sep. 30, 2005
`
`Foreign Application Priority Data
`
`(JP) ................................. 2005-2883OO
`
`(51)
`
`(52)
`(58)
`
`Int. C.
`(2006.01)
`H04L 2/26
`U.S. Cl. ....................................................... 370/252
`Field of Classification Search .................. 370/252,
`370/329, 203, 204, 241, 310,328; 375/298,
`375/302,308, 224, 225, 295, 299; 455/69,
`455/67.11, 102,450, 452.2, 29, 42, 61, 68
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`2003/0008683 A1
`1/2003 Nanao et al. .................. 455,561
`2003/0083.088 A1* 5/2003 Chang et al. ...
`... 455,522
`2004/0001472 A1
`1/2004 Kwak et al. ................... 370,342
`2005.0099992 A1
`5, 2005 Sato
`2005, 0164644 A1* 7/2005 Shinoi et al. .................... 455.69
`(Continued)
`
`JP
`
`FOREIGN PATENT DOCUMENTS
`2003-174485
`6, 2003
`(Continued)
`OTHER PUBLICATIONS
`International Search Report dated Oct. 31, 2006.
`3GPP TS 25.211 v6.5.0 (Jun. 2005), “Physical channels and map
`ping of transport channels onto physical channels (FDD). Release 6.
`Jun. 2005, pp. 1-49.
`
`(Continued)
`Primary Examiner — Derrick Ferris
`Assistant Examiner — Omar Ghowrwal
`(74) Attorney, Agent, or Firm — Seed IP Law Group PLLC
`(57)
`ABSTRACT
`Provided is a communication device, which is enabled to
`improve the throughput of a communication system by reduc
`ing the difference of a transmission power between an SCCH
`and an SDCH thereby to satisfy the required quality of a
`PAPR. In this device, an MCS selection unit (111) of a trans
`mission unit (110) decides, with reference to a COI lookup
`table, an MCS pattern (MCS1) of the SDCH, an MCS pattern
`(MCS2) of the SCCH and information (multiplex informa
`tion) on multiplex positions on the time axes of those two
`channels, on the basis of the CQI information. On the basis of
`the MCS2 and the MCS1, encoding modulation units (112
`and 113) perform encoding and modulating operations.
`According to the multiplex information, a channel multiplex
`ing unit (114) time-division multiplexes the SCCH and the
`SDCH thereby to generate a transmission signal.
`4 Claims, 13 Drawing Sheets
`
`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 2 of 22 PageID #: 34
`
`111b MCS SELECTING SECTION
`
`
`
`
`
`CQ
`LOOK-UP
`TABLE
`
`CO
`
`CO OFFSET COMMAND
`
`
`
`INFORMATION
`SELECTING
`SECTION
`
`

`

`US 8,149,727 B2
`Page 2
`
`U.S. PATENT DOCUMENTS
`2005/0208973 A1* 9, 2005 Iochi ............................. 455,561
`2005/0229.073 A1 ck 10 2005 Sudo
`370,335
`2008/O1236O1 A1 ck
`5/2008 Malladi et al. .
`370498
`2008/0253404 A1* 10/2008 Lampinet al.
`2010.0185777 A1* 7, 2010 Kim et al. ..................... TO9,231
`
`
`
`JP
`JP
`RU
`WO
`
`FOREIGN PATENT DOCUMENTS
`5, 2004
`2004-153640
`6, 2004
`2004-173019
`2, 2005
`2003125611. A
`3, 1999
`99 12281 A1
`
`OTHER PUBLICATIONS
`TSG-RAN WG1 Ad Hoc on LTE, “Text Proposal: Principles for the
`Evolved UTRA” R1-050679, Jun. 2005, 7 pages total.
`Hwanget al., "Clarification of H-ARQ Operation with Reduced AAS
`Private Map.” IEEE C802.16e-05/071, Jan. 11, 2005, 5 pages.
`English Language translation of Russian Office Action dated Jun. 24.
`2010, related to Russian Patent Application No. 2008112140/09
`(013127), 2 pages.
`Russian Office Action dated Jun. 24, 2010, related to Russian Patent
`Application No. 2008112140/09 (0.13127), 4 pages.
`* cited by examiner
`
`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 3 of 22 PageID #: 35
`
`

`

`U.S. Patent
`
`Apr. 3, 2012
`
`Sheet 1 of 13
`
`US 8,149,727 B2
`
`TRANSMISSION
`POWER
`
`AVERAGE
`POWER
`
`TIME
`
`AVERAGE
`POWER
`
`TIME
`
`TRANSMISSION
`POWER
`
`
`
`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 4 of 22 PageID #: 36
`
`FIG.1
`
`FIG.2
`
`

`

`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 5 of 22 PageID #: 37
`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 5 of 22 PageID #: 37
`
`U.S. Patent
`
`Apr. 3, 2012
`
`Sheet 2 of 13
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`US 8,149,727 B2
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`US 8,149,727 B2
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 7 of 22 PageID #: 39
`Case 2:20-cv-00310-JRG Document 1—1 Filed 09/20/20 Page 7 of 22 PageID #: 39
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`U.S. Patent
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`Apr. 3, 2012
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`Sheet 4 of 13
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`US 8,149,727 B2
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`U.S. Patent
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`U.S. Patent
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`US 8,149,727 B2
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 11 of 22 PageID #: 43
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`US. Patent
`
`Apr. 3, 2012
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`Sheet 8 of 13
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`US 8,149,727 B2
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`U.S. Patent
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`Apr. 3, 2012
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`Sheet 10 of 13
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`US 8,149,727 B2
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`105b: DECODING SECTION
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 13 of 22 PageID #: 45
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 15 of 22 PageID #: 47
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`US 8,149,727 B2
`
`1.
`RADIO TRANSMISSION APPARATUS, AND
`RADIO TRANSMISSION METHOD
`
`TECHNICAL FIELD
`
`The present invention relates to a radio transmitting appa
`ratus and radio transmission method used in a communication
`system employing an adaptive modulation scheme.
`
`BACKGROUND ART
`
`2
`the transmission power for the SCCH may be lower than the
`transmission power for the SDCH.
`In both cases, the difference of transmission power
`between the SCCH and the SDCH becomes large. Conse
`quently, the PAPR for the transmission signal including these
`two channels shows a high value, and so it is necessary to
`provide enough back-off of the transmission amplifier and
`decrease total transmission power upon transmission so as not
`to cause distortion in the transmission signal. As a result, the
`required quality of these two channels cannot be satisfied and
`communication system throughput decreases.
`It is therefore an object of the present invention to provide
`a radio transmitting apparatus and radio transmission method
`capable of improving communication system throughput by
`making the difference of transmission power between the
`SCCH and the SDCH small, suppressing an increase of the
`PAPR, and making it easier to satisfy required quality of the
`two channels.
`
`Means for Solving the Problem
`The radio transmitting apparatus of the present invention
`determines an MCS of the transmission signal based on a COI
`reported from a communicating party and adopts a configu
`ration including: a determining section that determines an
`MCS for a data channel based on the CQI reported from the
`communicating party and determines an MCS for a control
`channel based on the same COI; and a transmitting section
`that transmits the transmission signal including the data chan
`nel and the control channel.
`
`Advantageous Effect of the Invention
`According to the present invention, it is possible to Sup
`press an increase of the PAPR, make it easier to satisfy
`required quality of the two channels and improve communi
`cation system throughput.
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`FIG. 1 shows a specific example of a frame configuration
`where an SCCH and an SDCH are time division multiplexed:
`FIG. 2 shows another specific example of the frame con
`figuration where the SCCH and the SDCH are time division
`multiplexed:
`FIG. 3 is a block diagram showing a main configuration of
`a communication apparatus according to Embodiment 1;
`FIG. 4 is a block diagram showing a main internal configu
`ration of an MCS selecting section according to Embodiment
`1;
`FIG. 5 shows an example of content of a COI look-up table
`according to Embodiment 1;
`FIG. 6 shows an example of a frame format of a transmis
`sion signal where an SCCH and an SDCH are multiplexed:
`FIG. 7 is a block diagram showing a main configuration of
`a communication apparatus according to Embodiment 2:
`FIG. 8 is a block diagram showing a main internal configu
`ration of an MCS selecting section according to Embodiment
`2.
`FIG.9 shows an example of content of a COI look-up table
`according to Embodiment 2:
`FIG.10 is a block diagram showing a main configuration of
`a communication apparatus according to Embodiment 3:
`FIG. 11 is a block diagram showing a main internal con
`figuration of a decoding section according to Embodiment 3:
`FIG. 12 shows an example of a format of a signal where
`CQI information and a COI offset command are multiplexed:
`
`Currently, in uplink of 3GPP RAN LTE (Long Term Evo
`lution), to realize a low PAPR (Peak to Average Power Ratio),
`attention is focused on single carrier transmission. Further, a
`scheme is studied of selecting an MCS (Modulation and
`Coding Scheme) pattern per user according to a COI (Chan
`nel Quality Indicator) of the user and performing adaptive
`modulation and coding (AMC) to obtain high throughput (for
`example, see Non-Patent Document 1).
`Further, to perform adaptive modulation and coding, a
`technique is known of multiplexing a control channel
`required for decoding a data channel with the data channel
`and transmitting the multiplexed channel (for example, see
`Non-Patent Document 2). Non-Patent Document 2 defines an
`SDCH (Scheduled Data Channel) as a data channel and
`defines an SCCH (Scheduled Control Channel) as a control
`channel.
`Non-Patent Document 1:3GPP TS25.211 v6.5.0, June, 2005
`Non-Patent Document 2:3GPP TSG RAN1 R1-050679, June
`2005
`
`10
`
`15
`
`25
`
`30
`
`DISCLOSURE OF INVENTION
`
`Problems to be Solved by the Invention
`
`35
`
`45
`
`To focus on a subframe format studied in 3GPP RAN LTE,
`when a plurality of channels such as an SCCH and SDCH are
`multiplexed, a possible frame configuration is where a pilot
`channel is on an SB (Short Block) and the SCCH and SDCH
`are time division multiplexed on an LB (Long Block). FIGS.
`40
`1 and 2 show specific examples of frame configurations
`where the SCCH and SDCH are time division multiplexed.
`FIGS. 1 and 2 also show transmission power of the SCCH
`and SDCH. As shown in these figures, cases occur where the
`difference of transmission power between the SCCH and the
`SDCH increases due to the following reasons.
`As the MCS for the SCCH, a spreading factor, modulation
`scheme and coding rate where the required CNR is low, is
`commonly used by all users such that even a user in a poor
`reception environment can satisfy required quality. That is, in
`3GPP RAN LTE, adaptive modulation and coding is per
`formed, and so the MCS pattern for the SDCH changes vari
`ously, while the MCS pattern for the SCCH (not including
`transmission power) is fixed.
`However, to reduce level fluctuation errors due to fading
`and ensure required quality of the SCCH, the transmission
`power for the SCCH is controlled such that the transmission
`power is changed per user according to the received power of
`each user.
`That is, the transmission power for the SCCH changes
`through the transmission power control, while the transmis
`sion power for the SDCH changes through adaptive modula
`tion and coding, and therefore the transmission power for the
`SCCH and the transmission power for the SDCH change
`independently from each other. Therefore, as shown in FIG.
`1, the transmission power for the SCCH may be higher than
`the transmission power for the SDCH, or, as shown in FIG. 2,
`
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 17 of 22 PageID #: 49
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`

`

`US 8,149,727 B2
`
`3
`FIG. 13 is a block diagram showing a main internal con
`figuration of an MCS selecting section according to Embodi
`ment 3:
`FIG. 14 specifically illustrates how a COI is actually cor
`rected by the CQI offset command; and
`FIG.15 is a block diagram showing a main configuration of
`a communication apparatus provided with a radio receiving
`apparatus according to Embodiment 3.
`
`BEST MODE FOR CARRYING OUT THE
`INVENTION
`
`Embodiments of the present invention will be described in
`detail below with reference to the accompanying drawings.
`Here, a case will be described where the DFT-s-OFDM (Dis
`crete Fourier Transform-Spread-Orthogonal Frequency Divi
`sion Multiplex) scheme, that is, a single carrier communica
`tion scheme is employed as a communication scheme.
`
`Embodiment 1
`
`5
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`10
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`4
`In the meantime, MCS selecting section 111 of transmit
`ting section 110 determines the MCS pattern of an SDCH
`(MCS 1), the MCS pattern of an SCCH (MCS 2) and infor
`mation relating to the multiplexing position of these two
`channels in the time domain (multiplexing information),
`based on the CQI information outputted from decoding sec
`tion 105 with reference to a COI look-up table described later.
`MCS 1 is outputted to encoding and modulating section 113,
`MCS 2 is outputted to encoding and modulating section 112,
`and the multiplexing information is outputted to channel mul
`tiplexing section 114.
`Encoding and modulating section 113 performs encoding
`and modulating processing on inputted user data (transmis
`sion data sequence) based on the MCS pattern (MCS 1)
`outputted from MCS selecting section 111, and generates
`transmission data for the SDCH and an IR pattern used upon
`encoding. The transmission data for the SDCH is outputted to
`channel multiplexing section 114, and the IR pattern is out
`putted to encoding and modulating section 112.
`Encoding and modulating section 112 performs encoding
`and modulating processing on control information Such as the
`IR pattern outputted from encoding and modulating section
`113, based on the MCS pattern outputted from MCS selecting
`section 111, and generates transmission data for the SCCH.
`The generated transmission data for the SCCH is outputted to
`channel multiplexing section 114.
`Channel multiplexing section 114 time-division multi
`plexes the transmission data for the SCCH and SDCH out
`putted from encoding and modulating sections 112 and 113
`according to the multiplexing information outputted from
`MCS selecting section 111. The multiplexed transmission
`data is outputted to DFT-s-OFDM section 115.
`DFT-s-OFDM section 115 performs a discrete Fourier
`transform (DFT) on the transmission data outputted from
`channel multiplexing section 114, performs time-frequency
`conversion on time-series data, and obtains a frequency
`domain signal. After mapping the frequency domain signal on
`transmission subcarriers, DFT-s-OFDM section 115 per
`forms inverse fast Fourier transform (IFFT) processing and
`converts the frequency domain signal to a time domain signal.
`The obtained time domain signal is outputted to CP adding
`section 116.
`CP adding section 116 adds a CP per transmission data
`block by duplicating data at the tail of a block per transmis
`sion data block outputted from DFT-s-OFDM section 115 and
`inserting the duplicated data into the beginning of the block,
`and outputs the result to radio transmitting section 117.
`Radio transmitting section 117 converts the baseband sig
`nal outputted from CP adding section 116 to a radio frequency
`band, and transmits the result through antenna 120.
`FIG. 4 is a block diagram showing the main internal con
`figuration of MCS selecting section 111. Information select
`ing section 121 determines MCS 1 for the SDCH, MCS 2 for
`the SCCH and multiplexing information based on the input
`ted CQI with reference to COI look-up table 122 shown in
`FIG.S.
`FIG. 5 shows an example of content of CQI look-up table
`122 as described above. Here, a case will be described as an
`example where modulation schemes of BPSK (Binary Phase
`Shift Keying), QPSK (Quadrature Phase Shift Keying) 16
`QAM (Quadrature Amplitude Modulation) and 64 QAM are
`employed, coding rates of 1/3, 1/2, 2/3, 3/4, 5/6 and 7/8 are
`employed, and, only for BPSK, repetition factors (RFs) of 1.
`2, 4, 8, 16 and 32 are employed.
`For example, when CQI-7, information selecting section
`121 selects a modulation scheme of QPSK, a coding rate of
`3/4 and a repetition factor of 1 for the SDCH with reference to
`
`25
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`30
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`35
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`45
`
`FIG. 3 is a block diagram showing a main configuration of
`a communication apparatus provided with a radio transmit
`ting apparatus according to Embodiment 1 of the present
`invention.
`This communication apparatus is mainly configured with
`receiving section 100 and transmitting section 110. Receiving
`section 100 has radio receiving section 101, CP removing
`section 102, FFT section 103, demodulating section 104,
`decoding section 105 and channel estimating section 106, and
`transmitting section 110 has MCS selecting section 111,
`encoding and modulating sections 112 and 113, channel mul
`tiplexing section 114, DFT-s-OFDM section 115, CP adding
`section 116 and radio transmitting section 117.
`The sections of the above-described communication appa
`ratus perform the following operations.
`Radio receiving section 101 of receiving section 100 con
`verts the signal received through antenna 120 to a baseband
`signal and outputs the baseband signal to CP removing sec
`40
`tion 102. CP removing section 102 performs processing of
`removing a CP (Cyclic Prefix) part of the baseband signal
`outputted from radio receiving section 101, and outputs the
`obtained signal to FFT section 103. FFT section 103 performs
`a fast Fourier transform (FFT) on the time domain signal
`outputted from CP removing section 102, and outputs the
`obtained frequency domain signal to demodulating section
`104 and channel estimating section 106. Channel estimating
`section 106 estimates channel environment of the received
`signal using a pilot signal included in the signal outputted
`from FFT section 103, and outputs the estimated result to
`demodulating section 104. Demodulating section 104 per
`forms channel compensation on a signal where control infor
`mation Such as a pilot signal is removed (data information)
`out of the received signal subjected to the Fourier transform
`processing at FFT section 103, based on the estimated result
`of the channel environment outputted from channel estimat
`ing section 106. Further, demodulating section 104 performs
`demodulating processing on the signal Subjected to channel
`compensation based on the same MCS as used in the radio
`transmitting apparatus, that is, the same modulation scheme,
`coding rate, and the like as the radio transmitting apparatus,
`and outputs the result to decoding section 105. Decoding
`section 105 performs error correction on the demodulated
`signal and extracts an information data sequence and COI
`information from the received signal. The CQI information is
`outputted to MCS selecting section 111.
`
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 18 of 22 PageID #: 50
`
`

`

`5
`CQI look-up table 122, and outputs these collectively as MCS
`1. Further, information selecting section 121 uses the same
`CQI=7, selects a modulation scheme of QPSK, a coding rate
`of 1/3 and a repetition factor of 1 matching CQI=7 for the
`SCCH, and outputs these as MCS2. In this way, from FIG. 5,
`how MCS 1 for the SDCH and MCS 2 for the SCCH are set in
`association with each other for each CQI, can be understood.
`In this CQI look-up table 122, MCS 2 for the SCCH is set
`using the following method according to MCS 1 for the
`SDCH set on a per CQI basis.
`First, the MCS for the SDCH is determined for each CQI.
`Next, an average transmission rate of the SDCH is calculated
`per CQI, and the MCS for the SCCH is determined using the
`following determination method. That is, by assuming that
`the average transmission rate of the SDCH is A, the number of
`symbols of the SDCH is B, the PER (Packet Error Rate) when
`MCS 1 (for example, QPSK and R=1/2) is selected for the
`SCCH is C, the PER when MCS 2 (for example, QPSK and
`R=1/3) is selected for the SCCH is D, and the difference
`between the number of symbols of the SCCH (MCS 1) and
`the number of symbols of the SCCH (MCS 2) is E, and, by
`comparing “Ax(1-C)” with “Ax(1-D)x(E+B)/B, the MCS
`having the greater value, that is the MCS having the higher
`transmission rate is made the MCS for the SCCH. In addition,
`both (1-C) and (1-D) represent a rate of SDCH transmission
`rate decrease due to SCCH reception errors, and (E+B)/B
`represents a rate of SDCH transmission rate increase when
`SCCH resources are made SDCH resources.
`In other words, in CQI look-up table 122, MCS 1 and MCS
`2 are set Such that the PAPRS for the SCCH and SDCH remain
`30
`within the range of the assumed PAPR and a transmission rate
`of the SCCH and SDCH becomes a maximum.
`Further, in FIG. 5, multiplexing information A to P is
`information as described below. FIG. 6 shows an example of
`a frame format of a transmission signal where an SCCH and
`35
`an SDCH are multiplexed.
`This figure shows a frame format of the transmission signal
`when the CQI is different, for example, a transmission signal
`when the CQI is 2, shown in the upperpart, and a transmission
`signal when the CQI is 9, shown in the lower part. In this way,
`when the SCCH is mapped at the beginning and the SDCH is
`mapped following the SCCH, the number of transmission
`data for the SCCH, that is, the number of SCCH symbols,
`changes according to COIs, and so the starting position of the
`SDCH changes. Therefore, in this embodiment, a plurality of
`45
`types of information showing the starting position of the
`SDCH are set by CQI look-up table 122 as information (mul
`tiplexing information) relating to the multiplexing position of
`the two channels in the time domain. Channel multiplexing
`section 114 acquires multiplexing information for each COI
`set in CQI look-up table 122 through information selecting
`section 122 in MCS selecting section 111, and multiplexes
`the SCCH and the SDCH using this multiplexing informa
`tion.
`Here, the information amount before encoding which is
`transmitted using the SCCH, is a fixed rate regardless of the
`MCS for the SDCH. Therefore, particularly, when the CQI is
`high, more SCCH transmission symbols after encoding and
`modulation can be reduced than the case where the CQI is
`low, and the SCCH symbol resources can be used as SDCH
`60
`symbol resources (resources of a diagonal part in FIG. 6), so
`that it is possible to further improve SDCH throughput.
`In addition, CQI look-up table 122 is also provided to a
`radio receiving apparatus Supporting the radio transmitting
`apparatus according to this embodiment, and so the informa
`tion set in CQI look-up table 122 is known between the
`transmitting side and the receiving side.
`
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`Case 2:20-cv-00310-JRG Document 1-1 Filed 09/20/20 Page 19 of 22 PageID #: 51
`
`US 8,149,727 B2
`
`5
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`6
`In this way, according to this embodiment, in single carrier
`transmission where a plurality of channels are multiplexed,
`the MCS pattern for each channel is set in a COI table (CQI
`look-up table 122) according to COIs such that the difference
`of transmission power between the SCCH and the SDCH
`remains within a predetermined range. The radio transmitting
`apparatus according to this embodiment acquires MCS pat
`terns for channels of the SCCH and the SDCH according to
`CQIs with reference to this COI table, performs adaptive
`modulation and coding based on these MCS patterns and
`generates a transmission signal. By this means, it is possible
`to maintain a low PAPR of the transmission signal, and so it is
`more likely to satisfy required quality of the two channels.
`That is, it is possible to improve communication system
`throughput.
`Further, according to this embodiment, by changing the
`MCS pattern for the SCCH, the required quality for the SCCH
`is more likely to be satisfied, so that transmission power
`control is not required in the SCCH. Transmission power does
`not fluctuate independently from each other among a plurality
`of channels. Therefore, by maintaining a low PAPR, the two
`channels are more likely to satisfy the required quality, so that
`it is possible to improve communication system throughput.
`Further, according to this embodiment, the SCCH and the
`SDCH are set in the same CQI table so as to correspond to the
`same CQI, and this CQI table is shared between the transmit
`ting side and the receiving side. By this means, the radio
`receiving apparatus Supporting the radio transmitting appa
`ratus according to this embodiment can acquire information
`relating to the MCS for the SCCH with reference to the CQI
`table shared between the transmitting side and the receiving
`side based on the reported CQI, and does not need to sepa
`rately acquire information relating to the MCS for the SCCH
`from the radio transmitting apparatus according to this
`embodiment. That is, new signaling is not required.
`In this embodiment, the SCCH and the SDCH are shown as
`examples of a plurality of channels subjected to time division
`multiplexing, but the channels the present invention is
`directed to are not limited to these, and, for example, the
`present invention may also be directed to three or more chan
`nels having different required quality or may be directed to
`channels employing different coding schemes. Further, an
`example has been described where time division multiplexing
`is performed on the SCCH, followed by the SDCH, but this is
`by no means limiting, and, for example, time division multi
`plexing is performed on the SDCH, followed by the SCCH.
`Still further, a case has been described with this embodi
`ment where CQI look-up table 122 is structured such that
`different MCS patterns and the like are set for different CQIs,
`but CQI look-up table 122 may be structured such that the
`same MCS pattern is set for different CQIs.
`Further, COI look-up table 122 may be structured such that
`different MCS patterns are set per bandwidth to be used.
`Further, in this embodiment, COI look-up table 122 may be
`structured such that the SCCH and the SDCH are interleaved
`in a Sub-frame in the time domain.
`Still further, in this embodiment, CQI look-up table 122
`may be structured such that the above-described MCS and the
`like are added and the number of pilot symbols and the mul
`tiplexing position of this pilot are set.
`
`Embodiment 2
`
`FIG. 7 is a block diagram showing the main configuration
`of the communication apparatus provided with the radio
`transmitting apparatus according to Embodiment 2 of the
`present invention. This communication apparatus has a basic
`
`65
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`

`

`US 8,149,727 B2
`
`7
`configuration similar to the communication apparatus
`described in Embodiment 1 (see FIG. 3), and the same com
`ponents will be assigned the same reference numerals without
`further explanations.
`The communication apparatus according to this embodi
`ment further has power difference setting section 201 and
`power controlling section202, and the transmission power of
`the SCCH is controlled. However, predetermined limits are
`placed on the difference of transmission power between the
`SCCH and the SDCH, and so transmission power can satisfy
`the required PAPR even if the transmission power is con
`trolled. This is different from Embodiment

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