111111
`
`1111111111111111111111111111111111111111111111111111111111111
`US008064919B2
`
`(12) United States Patent
`Fukuoka et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,064,919 B2
`Nov. 22, 2011
`
`(54) RADIO COMMUNICATION BASE STATION
`DEVICE AND CONTROL CHANNEL
`ARRANGEMENT METHOD
`
`(75)
`
`Inventors: Masaru Fukuoka, Ishikawa (JP);
`Akihiko Nishio, Kanagawa (lP); Seigo
`Nakao, Kanagawa (JP); Alexander
`Golitschek Edler Von Elbwart,
`Darmstadt (DE)
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`6,993,339 B2 *
`112006 Skillermark et al .......... 455/447
`7,639,660 B2 *
`1212009 Kim et al ...................... 370/343
`212008 Nangia
`2008/0049851 Al
`2008/0293424 Al *
`1112008 Cho et al. ...................... 455/450
`7/2009 Kishiyama
`200910185577 Al
`201010034165 Al *
`212010 Han et al. ...................... 370/330
`7/2010 Fukuoka
`201010165926 Al
`
`(73) 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 0 days.
`
`JP
`
`FOREIGN PATENT DOCUMENTS
`2007-074261
`3/2007
`(Continued)
`
`(21) Appl. No.: 12/983,770
`
`(22) Filed:
`
`Jan. 3,2011
`
`(65)
`
`Prior Publication Data
`
`US 201110110319 Al
`
`May 12, 2011
`
`Related U.S. Application Data
`
`(63) Continuation of application No. 12/532,352, filed as
`application No. PCT/1P2008/000675 on Mar. 21,
`2008, now Pat. No. 7,941,153.
`
`(30)
`
`Foreign Application Priority Data
`
`Mar. 23, 2007
`May 1, 2007
`Aug. 13, 2007
`
`(JP) ................................. 2007-077502
`(JP) ................................. 2007-120853
`(JP) ................................. 2007-211104
`
`(51)
`
`Int. Cl.
`H04W 72104
`(2009.01)
`(52) U.S. Cl. ..................... 455/450; 455/451; 455/452.1;
`455/455; 455/434; 455/464; 370/330; 370/343;
`370/347; 370/328; 370/329
`(58) Field of Classification Search .................. 455/450,
`455/451,452.1,455,434,464; 370/329,
`370/328,343,347,330
`See application file for complete search history.
`
`OTHER PUBLICATIONS
`
`International Search Report dated Jul. 1, 2008.
`
`(Continued)
`
`Primary Examiner - Nick Corsaro
`Assistant Examiner - Michael Vu
`(74) Attorney, Agent, or Firm - Dickinson Wright PLLC
`
`(57)
`
`ABSTRACT
`
`Provided is a radio communication base station device which
`can obtain a maximum frequency diversity effect of a down(cid:173)
`stream line control channel. The device includes: an RB allo(cid:173)
`cation unit (101) which allocates upstream line resource
`blocks continuous on the frequency axis for respective radio
`communication mobile stations by the frequency scheduling
`and generates allocation information indicating which
`upstream line resource block has been allocated to which
`radio communication mobile station device; and an arrange(cid:173)
`ment unit (109) which arranges a response signal to the radio
`communication mobile station device in the downstream line
`control channels distributed/arranged on the frequency axis
`while being correlated to the continuous upstream line
`resource blocks according to the allocation information.
`
`18 Claims, 23 Drawing Sheets
`
`201
`
`TRANSMISSION DATA
`
`209
`
`BlackBerry Exhibit 1001, pg. 1
`
`

`
`US 8,064,919 B2
`Page 2
`
`WO
`wo
`wo
`
`FOREIGN PATENT DOCUMENTS
`2006/071049
`7/2006
`10/2006
`2006/109436
`212007
`2007/018154
`
`OTHER PUBLICATIONS
`
`3GPP RAN WG 1 Meeting document, "Assignment of Downlink
`ACKINACK Channel," Panasonic, RI-070932, Feb. 2007, pp. 1-2.
`3GPP RAN WG 1 Meeting document, "ACKINACK Channel Trans(cid:173)
`mission in E-UTRA Downlink," RI-070734, Feb. 2007, pp. 1-9.
`Japanese Office Action dated Jui. 20, 2010.
`
`3GPP RAN WGI Meeting #47, "ACKINACK Signal Structure in
`E-UTRA Downlink," NTT DoCoMo, et aI., RI-063326, Nov. 2006,
`pp.I-3.
`3GPP RAN WG 1 Meeting #48, "Control Channel Structure for
`EUTRA Downlink," Samsung, RI-070959, Feb. 2007, pp. 1-3.
`N. Miki, et aI., "Investigation on Optimum Channel Coding Scheme
`ofLl/L2 Control Signaling Bits in Evolved UTRA Downlink," Pro(cid:173)
`ceedings ofIEICE General Conference, B-5-61, Mar. 2007, p. 475.
`N. Miki, et ai., "Investigation on Multiplexing Methods of Ll/L2
`Control Signaling Bits in Time and Frequency Domain for Evolved
`UTRA Downlink," Proceedings ofIEICE General Conference, B-5-
`62, Mar. 2007, p. 476.
`* cited by examiner
`
`BlackBerry Exhibit 1001, pg. 2
`
`

`
`FIG.1
`
`FREQUENCY
`
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`
`RB#7
`
`RB#6
`
`R8#5
`
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`
`BlackBerry Exhibit 1001, pg. 3
`
`

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`FREQUENCY
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`BlackBerry Exhibit 1001, pg. 4
`
`

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`FIG.3
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`
`BlackBerry Exhibit 1001, pg. 5
`
`

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`FIG.4
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`BlackBerry Exhibit 1001, pg. 6
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`BlackBerry Exhibit 1001, pg. 7
`
`

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`U.S. Patent
`
`Nov. 22, 2011
`
`32fl.06teehS
`
`US 8,064,919 B2
`
`FIG.6
`
`>OzmDO....Eu_mwu»wwuaw.mummu.mm“.mm“.5%2%mimlNJ.WCofmmmm.mm.
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`BlackBerry Exhibit 1001, pg. 8
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`

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`BlackBerry Exhibit 1001, pg. 9
`
`

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`BlackBerry Exhibit 1001, pg. 10
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`BlackBerry Exhibit 1001, pg. 11
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`

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`BlackBerry Exhibit 1001, pg. 12
`
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`BlackBerry Exhibit 1001, pg. 13
`
`

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`BlackBerry Exhibit 1001, pg. 14
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`BlackBerry Exhibit 1001, pg. 15
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`BlackBerry Exhibit 1001, pg. 16
`
`

`
`FIG.15
`
`FREQUENCY
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`BlackBerry Exhibit 1001, pg. 17
`
`

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`BlackBerry Exhibit 1001, pg. 18
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`BlackBerry Exhibit 1001, pg. 19
`
`

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`FIG.18A
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`
`BlackBerry Exhibit 1001, pg. 20
`
`

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`FIG.188
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`BlackBerry Exhibit 1001, pg. 21
`
`

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`BlackBerry Exhibit 1001, pg. 22
`
`

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`U.S. Patent
`
`Nov. 22, 2011
`
`Sheet 21 of 23
`
`US 8,064,919 B2
`
`FIG.20
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`BlackBerry Exhibit 1001, pg. 23
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`BlackBerry Exhibit 1001, pg. 24
`
`

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`BlackBerry Exhibit 1001, pg. 25
`
`

`
`US 8,064,919 B2
`
`1
`RADIO COMMUNICATION BASE STATION
`DEVICE AND CONTROL CHANNEL
`ARRANGEMENT METHOD
`
`This is a continuation application of application Ser. No.
`12/532,352 filed Sep. 21, 2009, which is a national stage of
`PCT/JP200S/000675 filed Mar. 21, 200S, which is based on
`Japanese Application No. 2007-077502 filed Mar. 23, 2007;
`Japanese Application No. 2007-120S53 filed May 1, 2007;
`and Japanese Application No. 2007-211104 filed Aug. 13,
`2007, the entire contents of each which are incorporated by
`reference herein.
`
`TECHNICAL FIELD
`
`The present invention relates to a radio communication
`base station apparatus and control channel mapping method.
`
`BACKGROUND ART
`
`5
`
`2
`bands, subcarriers f1 to f4, f9 to f12, f17 to f20 and f25 to f28
`shown in FIG. 2, and transmits the response signals to the
`mobile stations. Further, the base station spreads a response
`signal with spreading code having spreading factor 4, and
`repeats the spread response signal with repetition factor 2.
`Therefore, as shown in FIG. 2, downlink control channels CH
`#1 to CH #4 are mapped to identical bands, sub carriers f1 to
`f4 and f17 to f20 in a localized manner, and downlink control
`channels CH #5 to CH #8 are mapped to identical bands,
`10 subcarriers f9 to f12 and f25 to f28 in a localized manner.
`Further, as shown in FIG. 3, the uplink RBs shown in FIG.
`1 and the downlink control channels shown in FIG. 2 are
`associated one by one. Therefore, as shown in FIG. 3, a
`response signal to uplink data transmitted using RB #1 shown
`15 in FIG. 1 is mapped to downlink control channel CH #1, that
`is, mapped to sub carriers f1 to f4 and f17 to f20 shown in FIG.
`2. Likewise, as shown in FIG. 3, a response signal to uplink
`data transmitted using RB #2 shown in FIG. 1 is mapped to
`downlink control channel CH #2, that is, mapped to subcar-
`20 riers f1 to f4 and f17 to f20 shown in FIG. 2. The same applies
`to RB #3 to RB #8.
`Further, when a coding block is formed with a plurality of
`consecutive RBs on the frequency domain and RBs are allo(cid:173)
`cated in one-block units, the base station transmits response
`signals to mobile stations by mapping response signals to a
`plurality of downlink control channels in association with a
`plurality of uplink RBs included in one coding block. For
`example, when one coding block is formed with three con(cid:173)
`secutive uplink RBs, RB #1 to RB #3, amongst uplink RB #1
`to RB #8 shown in FIG. 1, the base station maps code(cid:173)
`multiplexed spread response signals to downlink control
`channels CH #1 to CH #3 mapped in a localized manner in
`identical bands, subcarriers f1 to f4 and f17 to f20 shown in
`FIG. 2.
`Although downlink control channels CH #1 to CH #8 are
`mapped to sixteen subcarriers, sub carriers f1 to f4, f9 to f12,
`f17 to f20 and f25 to f28 in this way, with the above example,
`response signals are mapped only to eight subcarriers, sub(cid:173)
`carriers f1 to f4 and f17 to f20. That is, with the above
`example, response signals are only mapped to half of all
`subcarriers to which downlink control channels are mapped.
`In the case where downlink control channels mapped in the
`limited frequency domain are used in this way, little fre(cid:173)
`quency diversity effect may be obtained depending upon the
`positions to which downlink control channels are mapped.
`It is therefore an object of the present invention to provide
`a base station and control channel mapping method that can
`maximize the frequency diversity effect on downlink control
`channels.
`
`Means for Solving the Problems
`
`In mobile communication, ARQ (Automatic Repeat
`reQuest) is applied to uplink data transmitted from a radio
`communication mobile station apparatus (hereinafter simply
`"mobile station") to a radio communication base station
`apparatus (hereinafter simply "base station") in uplink, and a 25
`response signal showing uplink data error detection result is
`fed back to the mobile station in downlink. The base station
`performs a CRC (Cyclic Redundancy Check) for the uplink
`data, and, if CRC=O K (no error), anACK (Acknowledgment)
`signal is fed back, and, ifCRC=NG (error), a NACK (Nega- 30
`tiveAcknowledgment) signal is fed back as a response signal
`to the mobile station.
`To use downlink communication resources efficiently,
`studies are conducted recently about ARQ, which associates
`uplink resource blocks (RBs) for transmitting uplink data and 35
`downlink control channels for transmitting response signals
`in downlink (e.g. see Non-patent Document 1). By this
`means, a mobile station is able to identifY control channels in
`which a response signal is transmitted to the mobile station
`according to RB allocation information reported from the 40
`base station even when allocation information about the con(cid:173)
`trol channel is not reported separately.
`Further, studies are conduct for ARQ recently whereby a
`response signal is spread and the spread response signal is
`duplicated in order to average interference of the response 45
`signal from neighboring cells or sectors and provide fre(cid:173)
`quency diversity gain for the response signal (e.g. see Non(cid:173)
`patent Document 2).
`Non-patent Document 1: 3GPP RAN WGI Meeting docu(cid:173)
`ment, RI-070932, "Assignment of Downlink ACKINACK 50
`Channel," Panasonic, February 2007
`Non-patent Document 2: 3GPP RAN WGI Meeting docu(cid:173)
`ment, RI-070734, "ACKINACK Channel Transmission in
`E-UTRA Downlink," TI, February 2007
`
`The base station of the present invention adopts a configu(cid:173)
`ration including: an allocation section that allocates a first
`55 control channel formed with a plurality of consecutive RBs or
`a plurality of CCEs to a radio communication mobile station
`apparatus; and a mapping section that maps control signals
`for the radio communication mobile station apparatus to a
`plurality of second control channels mapped in a distributed
`60 manner on a frequency domain in association with the plu(cid:173)
`rality of RBs or the plurality of CCEs.
`
`DISCLOSURE OF INVENTION
`
`Problems to be Solved by the Invention
`
`It is possible to use the above ARQs studied recently by
`combining them. Now, a specific example to map response
`signals to downlink control channels will be explained. With
`the following explanation, a base station receives uplink data
`transmitted from mobile stations using uplink RB #1 to RB #8
`shown in FIG. 1, and the base station maps response signals to 65
`uplink data (ACK signals and NACK signals) to downlink
`control channels CH #1 to CH #8, mapped in four frequency
`
`Advantageous Effect of the Invention
`
`According to the present invention, it is possible to maxi(cid:173)
`mize the frequency diversity effect on downlink control chan(cid:173)
`nels.
`
`BlackBerry Exhibit 1001, pg. 26
`
`

`
`3
`BRIEF DESCRIPTION OF DRAWINGS
`
`US 8,064,919 B2
`
`FIG. 1 illustrates an uplink RB mapping example;
`FIG. 2 illustrates a mapping example of downlink control
`channels;
`FIG. 3 shows the associations between uplink RBs and
`downlink control channels;
`FIG. 4 is a block diagram showing the configuration of the
`base station according to Embodiment 1 of the present inven(cid:173)
`tion;
`FIG. 5 is a block diagram showing the configuration of the
`mobile station according to Embodiment 1 of the present
`invention;
`FIG. 6 illustrates the downlink control channel mapping
`according to Embodiment 1 of the present invention;
`FIG. 7 illustrates the downlink control channel mapping
`according to Embodiment 2 of the present invention;
`FIG. 8 illustrates the downlink control channel mapping in
`cell 2, according to Embodiment 3 of the present invention;
`FIG. 9 shows the associations between SCCHs and down(cid:173)
`link CCEs according to Embodiment 4 of the present inven(cid:173)
`tion;
`FIG. 10 illustrates the downlink CCE mapping example
`according to Embodiment 4 of the present invention;
`FIG. 11 shows the associations between downlink CCEs
`and downlink control channels according to Embodiment 4 of
`the present invention;
`FIG. 12 is a block diagram showing the configuration of the
`base station according to Embodiment 4 of the present inven(cid:173)
`tion;
`FIG. 13 is a block diagram showing the configuration of the
`mobile station according to Embodiment 4 of the present
`invention;
`FIG. 14 shows the associations (variations) between
`SCCHs and downlink CCEs, according to Embodiment 4 of
`the present invention;
`FIG. 15 illustrates the downlink control channel mapping
`according to Embodiment 4 of the present invention;
`FIG. 16 illustrates downlink CCEs used in the number of
`OFDMs for multiplexing according to Embodiment 5 of the 40
`present invention;
`FIG. 17 is a block diagram showing the configuration of the
`base station according to Embodiment 5 of the present inven(cid:173)
`tion;
`FIG. 18A illustrates the physical resources (the number of
`OFDMs for multiplexing: 1), according to Embodiment 5 of
`the present invention;
`FIG. 18B illustrates the physical resources (the number of
`OFDMs for multiplexing: 2), according to Embodiment 5 of
`the present invention;
`FIG. 19 is a block diagram showing the configuration of the
`mobile station according to Embodiment 5 of the present
`invention;
`FIG. 20 illustrates the downlink control channel mapping
`according to Embodiment 5 of the present invention;
`FIG. 21 illustrates another downlink control channel map(cid:173)
`ping (example 1); and
`FIG. 22 illustrates another downlink control channel map(cid:173)
`ping (example 2).
`
`4
`OFDM scheme. Further, the mobile station according to the
`present embodiment transmits uplink data by DFTs-FDMA
`(Discrete Fourier Transform spread Frequency Division Mul(cid:173)
`tiple Access). When uplink data is transmitted by DFTs(cid:173)
`FDMA, as described above, a coding block is formed with a
`plurality of consecutive RBs on the frequency axis (in the
`frequency domain), and the base station allocates RBs to
`mobile stations in one-block units.
`
`Embodiment 1
`
`10
`
`FIG. 4 shows the configuration of base station 100 accord(cid:173)
`ing to the present embodiment, and FIG. 5 shows the configu(cid:173)
`ration of mobile station 200 according to the present embodi-
`15 ment.
`To avoid complex explanation, FIG. 4 shows components
`that pertain to uplink data reception and downlink transmis(cid:173)
`sion of response signals to uplink data, which the present
`invention closely relates to, and drawings and explanations of
`20 components that pertain to downlink data transmission are
`omitted. Similarly, FIG. 5 shows components that pertain to
`uplink data transmission and downlink reception of response
`signals to uplink data, which the present invention closely
`relates to, and drawings and explanations of components that
`25 pertain to downlink data reception are omitted.
`In base station 100 in FIG. 4, RB allocation section 101
`allocates uplink RBs to mobile stations by frequency sched(cid:173)
`uling and generates RB allocation information showing
`which uplink RBs are allocated to which mobile stations (i.e.
`30 allocation information showing RB allocation results), and
`outputs the generated RB allocation information to encoding
`section 102 and mapping section 109. Further, RB allocation
`section 101 allocates RBs using a plurality of consecutive
`RBs included in one coding block, as one unit. An RB is
`35 formed by grouping into a block a number of subcarriers
`neighboring each other at intervals of coherence bandwidth.
`Encoding section 102 encodes the RB allocation informa(cid:173)
`tion, and outputs the encoded RB allocation information to
`modulation section 103.
`Modulation section 103 modulates the encoded RB allo(cid:173)
`cation information, to generate RB allocation information
`symbols, and outputs the RB allocation information symbols
`to SIP section (serial-to-parallel conversion section) 104.
`SIP section 104 converts the RB allocation information
`45 symbols received as input from modulation section 103 in
`series into parallel RB allocation information symbols, and
`outputs the parallel RB allocation information symbols to
`mapping section 109.
`Modulation section 105 modulates a response signal
`50 received as input from CRC section 117 and outputs the
`modulated response signal to spreading section 106.
`Spreading section 106 spreads the response signal received
`as input from modulation section 105 and outputs the spread
`response signal to repetition section 107.
`Repetition section 107 duplicates (repeats) the response
`signal received as input from spreading section 106 and out(cid:173)
`puts a plurality of response signals including identical
`response signals, to SIP section 108.
`SIP section 108 converts the response signals received as
`60 input from repetition section 107 in series into parallel
`response signals, and outputs the parallel response signals to
`mapping section 109.
`Mapping section 109 maps the RB allocation information
`symbols and response signals to a plurality of subcarriers
`65 forming an OFDM symbol, and outputs the mapped RB allo(cid:173)
`cation information symbols and response signals to IFFT
`(Inverse Fast Fourier Transform) section 110. Here, based on
`
`55
`
`BEST MODE FOR CARRYING OUT THE
`INVENTION
`
`Now, embodiments of the present invention will be
`described in detail with reference to the accompanying draw(cid:173)
`ings. The base station according to the present embodiment of
`the present invention transmits a response signal using the
`
`BlackBerry Exhibit 1001, pg. 27
`
`

`
`US 8,064,919 B2
`
`5
`the RB allocation information received as input from RB
`allocation section 101, mapping section 109 maps the
`response signals to downlink control channels mapped on the
`frequency domain in association with uplink RBs. For
`example, when mapping section 109 receives RB #1 to RB #3
`shown in FIG. 1 from RB allocation section 101 as RB allo(cid:173)
`cation information for mobile station 200, as shown in FIG. 3,
`mapping section 109 maps response signals to uplink data
`transmitted from mobile station 200 using RB #1 to RB #3, to
`downlink control channels CH #1 to CH #3. The mapping
`processing in mapping section 109 will be described later in
`detail.
`IFFT section 110 perfonns an IFFT on the RB allocation
`information symbols and response signals mapped to a plu(cid:173)
`rality of subcarriers, to generate an OFDM symbol, and out(cid:173)
`puts the generated 0 FD M symbol to CP (Cyclic Prefix) addi(cid:173)
`tion section 11I.
`CP addition section 111 adds the same signal as the tail part
`of the OFDM symbol, as a CP, to the head of the OFDM 20
`symbol.
`Radio transmitting section 112 performs transmitting pro(cid:173)
`cessing including D/A conversion, amplification and up-con(cid:173)
`version, on the OFDM symbol with a CP, and transmits the
`OFDM symbol with a CP after transmitting processing, from 25
`antenna 113, to mobile station 200.
`Meanwhile, radio receiving section 114 receives uplink
`data transmitted from mobile station 200 via antenna 113, and
`performs receiving processing including down-conversion
`and AID conversion for this uplink data.
`Demodulation section 115 demodulates the uplink data
`and outputs the demodulated uplink data to decoding section
`116.
`Decoding section 116 decodes the demodulated uplink
`data, and outputs the decoded uplink data to CRC section 117.
`CRC section 117 perfonns error detection for the uplink
`data after the decoding using CRC, to generate, as a response
`signal, an ACK signal if CRC=OK (no error) or a NACK
`signal if CRC=NG (error), and outputs the generated
`response signal to modulation section 105. Further, if
`CRC=OK (no error), CRC section 117 outputs the uplink data
`after decoding as received data.
`Meanwhile, in mobile station 200 shown in FIG. 5, radio
`receiving section 202 receives an OFDM symbol transmitted 45
`from base station 100 via antenna 201, and perfonns receiv(cid:173)
`ing processing including down-conversion and AID conver(cid:173)
`sion on this OFDM symbol.
`CP removing section 203 removes the CP from the OFDM
`symbol after receiving processing.
`FFT (F ast Fourier Transfonn) section 204 perfonns an FFT
`on the OFDM symbol after CP removal, to acquire RB allo(cid:173)
`cation infonnation symbols and response signals, and outputs
`them to demultiplexing section 205.
`Demultiplexing section 205 demultiplexes the input sig- 55
`nals into the RB allocation infonnation symbols and the
`response signals, and outputs the RB allocation infonnation
`symbols to PIS section 206 and the response signals to PIS
`section 210. Here, based on the specified result received as
`input from mapping specifYing section 209, demultiplexing 60
`section 205 demultiplexes response signals from the input
`signal.
`PIS section 206 converts a plurality of parallel RB alloca(cid:173)
`tion infonnation symbols received as input from demultiplex(cid:173)
`ing section 205 into RB allocation information symbols in 65
`series, and outputs the RB allocation infonnation symbols in
`series to demodulation section 207.
`
`6
`Demodulation section 207 demodulates the RB allocation
`information symbols, and outputs the demodulated. RB allo(cid:173)
`cation infonnation to decoding section 208.
`Decoding section 208 decodes the demodulated RB allo(cid:173)
`cation information, and outputs the decoded RB allocation
`information to transmission control section 214 and mapping
`specifYing section 209.
`Based on the RB allocation infonnation received as input
`from decoding section 208, mapping specifYing section 209
`10 specifies downlink control channels to which response sig(cid:173)
`nals to uplink data transmitted from the mobile station are
`mapped. For example, when the RB allocation infonnation
`for a mobile station is RB #1 to RB #3 shown in FIG. 1, as
`shown in FIG. 3, mapping specifYing section 209 specifies
`15 CH #1 to CH #3 to be downlink control channels for the
`mobile station to which the response signals are mapped.
`Then mapping specifYing section 209 outputs the specified
`result to demultiplexing section 20