Technical Field
[0001]
The present disclosure relates to a terminal device, a base station device,
10 and a communication method.
Background A1t
[0002]
Wireless access schemes and wireless networks of cellular mobile
15 communication ··(hereinafter also referred to as LTE-Advanced (LTE-A), LYEAdvanced
Pro (LTE-A Pro), or Evolved Universal Terrestrial Radio Access
(EUTRA)) are under review in 3rd Generation Partnership Project (3GPP). Ftuther,
in the following description, LTE includes LTE-A, LTE-A Pro, and EUTRA. In
LTE, a base station device (base station) is also referred to as an evolved Node B
20 (eNodeB), and a terminal device (a mobile station, a mobile station device, or a
terminal) is also referred to as a user equipment (UE). LTE is a cellular
communication system in which a plurality of areas covered by a base station device
are arranged in a cell form. A single base station device may manage a plurality of
cells.
25 [0003]
lTE is compatible with frequency division duplex (FDD) and time division
duplex (TDD). LTE employing the FDD scheme is also referred to as FD-LTE or
LTE FDD. TDD is a technology which enables full duplex communication to be
performed in at least two frequency bands by performing frequency division
30 multiplexing on an uplink signal and a downlink signal. LTE employing the TOO
scheme is also referred to as TD-LTE or r:rE TOO. TOO is a technology that
5
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enables filii duplex communication to be performed in a single frequency band by
performing time division multiplexing on an uplink signal and a downlink signal.
The details of FD-LTE and TD-LTE are disclosed in Non-Patent Literature 1.
[0004]
The base station device maps a physical channel and a physical signal to
physical resout·ces configured on the basis of a predefined fi·ame configuration and
transmits the physical channel and the physical signal. The terminal device receives
the physical channel and the physical signal transmitted from the base station device.
In LTE, a plurality of fi·ame configuration types are specified, and data transmission
10 is performed using physical resources of a fi·ame configuration corresponding to each
15
frame configuration type. For example, a frame configuration type 1 is applicable
to FD-LTE, and a frame configuration type 2 is applicable to TD-LTE. The details
of the fi·ame structure are disclosed in Non-Patent Literature I.
(0005]
In LTE, a predetermined time interval is specified as a unit of time in which
data transmission is performed. Such a time interval is referred to as a transmission
time interval (TTl). For example, the TTl is one millisecond, and in this case, one
TTl corresponds to one sub fi·ame length. The base station device and the terminal
device perform transmission and reception of the physical channel and/or the
20 physical signal on the basis of the TTl. The details of the TTl are disclosed in Non-
Patent Literature 2.
[0006]
Fm1her, the TTl is used as a unit specifying a data transmission procedure.
For example, in the data transmission procedure, a hybrid automatic repeat request-
25 acknowledgment (1-IARQ-ACK) report indicating whether or not received data has
been correctly received is transmitted after a period of time specified as an integer
multiple of the TTl after data is received. Therefore, a period of time (delay or
latency) necessary tor data transmission is decided depending on the TTl. Such a
data transmission procedure is disclosed in Non-Patent Literature 3.
30
Citation List
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· Non-Patent Literature
[0007]
Non-Patent Literature I: 3rd Generation Pattnership Project; Technical
Specification Group Radio Access Network; Evolved Universal Terrestrial Radio
5 Access (E-UTRA); Physical Channels and Modulation (Release 12), 3GPP TS
36.211 Vl2.7.0 (2015-09).
Non-Patent Literature 2: 3rd Generation Partnership Project; Technical
Specification Group Radio Access Network; Evolved Universal Terrestrial Radio
Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-
10 UTRAN); Overall description; Stage 2 (Release 12), 3GPP TS 36.300 V12.7.0
(2015-09).
Non-Patent Literature 3: 3rd Generation Partnership Project; Technical
Specification Group Radio Access Network; Evolved Universal Terrestrial Radio
Access (E-UTRA); Physical layer procedures (Release 12), 3GPP TS 36.213 V12.7.0
15 (2015-09).
20
Disclosure of Invention
Technical Problem
[0008]
In LTE, only one millisecond is specified as the TTl, and the physical
channel and the physical signal are specified on the basis of the TTl of I msec.
Fmther, a period of time necessary for data transmission is an integral multiple of I
millisecond. For this reason, in a use case in which the period of time necessary for
data transmission is impattant, a size (length) of the TTl affects a characteristic.
25 Further, in a case in which a plurality of physical resources are consecutively
30
allocated to the terminal device in such a use case in order to reduce the period of
time necessary for data transmission, transmission efficiency of the entire system
greatly deteriorates.
[0009]
The present disclosure was made in light of the above problem, and it is an
object to provide a base station device, a terminal device, a communication system, a
r
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communication method, and an integrated circuit, which are capable of improving
the transmission efficiency of the entire system in consideration of the period of time
necessary for data transmission in a communication system in which a base station
device and a terminal device communicate with each other.
Solution to Problem
[001 OJ
According to the present disclosure, there is provided a terminal device that
communicates with a base station device, the terminal device including: a receiving
10 unit configured to receive a first POSCH that is transmitted on a basis of a sub frame
which is defined by a predetermined number of symbols, and a second POSCH that
is transmitted on a basis of an extended sub frame which has a smaller number of
symbols than a number of symbols corresponding to the sub frame; and a
transmitting unit configured to transmit a first HARQ-ACK that is a feedback for
15 reception of the first PDSCH after a predetermined sub frame, and transmit a second
HARQ-ACK that is a feedback for reception of the second PDSCH after a
predetermined extended sub frame.
[0011]
In addition, according to the present disclosure, there is provided a base
20 station device that communicates with a terminal device, the base station device
including: a transmitting unit configured to transmit a first PDSCH that is transmitted
on a basis of a sub fi·ame which is defined by a predetermined number of symbols,
and a second PDSCH that is transmitted on a basis of an extended sub frame which
has a smaller number of symbols than a number of symbols corresponding to the sub
25 fi·ame; and a receiving unit configured to receive a first HARQ-ACK that is a
feedback for reception of the first PDSCH after a predetermined sub frame, and
receive a second HARQ-ACK that is a feedback for reception of the second POSCH
after a predetermined extended sub frame.
30
[0012]
In addition, according to the present disclosure, there is provided a
communication method that is used by a terminal device which communicates with a
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base station device, the communication method including: a step of receiving a first
POSCH that is transmitted on a basis of a sub frame which is defined by a
predetermined number of symbols, and a second POSCH that is transmitted on a
basis of an extended sub fi·ame which has a smaller number of symbols than a
5 number of symbols corresponding to the sub fi·ame; and a step of transmitting a first
HARQ-ACK that is a feedback for reception of the first POSCH after a
predetermined sub fi·ame, and transmitting a second HARQ-ACK that is a feedback
for reception of the second POSCH after a predetermined extended sub frame.
10
[0013]
In addition, according to the present disclosure, there is provided a
communication method that is used by a base station device which communicates
with a terminal device, the communication method including: a step of transmitting a
first POSCH that is transmitted on a basis of a sub frame which is defined by a
predetermined number of symbols, and a second POSCH that is transmitted on a
15 basis of an extended ·sub· frame which has a smaller number of symbols than a
20
number of symbols corresponding to the sub frame; and a step of receiving a first
HARQ-ACK that is a feedback for reception of the first POSCH after a
predetermined sub fi·ame, and receiving a second HARQ-ACK that is a feedback for
reception of the second PDSCH after a predetermined extended sub frame.
Advantageous Effects oflnvention
[0014]
As described above, according to the present disclosure, it is possible to
improve the transmission efficiency in the wireless commtmication system in which
25 the base station device and the terminal device communicate with each other.
[00 15]
Note that the effects described above are not necessarily limitative. With
or in the place of the above effects, there may be achieved any one of the effects
described in this specification or other effects that may be grasped from this
30 specification.
I r./ .
.
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Brief Description of Drawings
[0016]
[FIG. I] FIG. I is a diagram illustrating an example of a downlink sub fi·ame of tire
present embodiment.
5 [FIG. 2] FIG. 2 is a diagram illustrating an example of an uplink sub fi·ame of the
present embodiment.
[FIG. 3] FIG. 3 is a schematic block diagram illustrating a configuration of a base
station device I of the present embodiment.
[FIG. 4] FIG. 4 is a schematic block diagram illustrating a configuration of a terminal
10 device 2 of the present embodiment.
[FIG. 5] FIG. 5 is a diagram illustrating an example of downlink resource element
mapping in the present embodiment.
[FIG. 6] FIG. 6 is a diagram illustrating an example of a TTl in the present
embodiment.
15 [FIG. 7] FIG. 7- IS ·-a diagram illustrating an example of a TTl in the present
embodiment.
[FIG. 8] FIG. 8 is a diagram illustrating an example of a set ofSPDSCH candidates.
[FIG. 9] FIG. 9 is a diagram illustrating an example of an SPDCCH set and an
SPDSCH in the present embodiment.
20 [FIG. 10] FIG. 10 is a diagram illustrating an example of an SPDCCH set, an
SPDSCH, a PDCCH region, and a POSCH in the present embodiment.
[FIG. II] FIG. II is a diagram illustrating an example of a configuration of an SREG
in the present embodiment.
[FIG. 12] FIG. 12 is a diagram illustrating an example of an SCCE configuration in
25 the present embodiment.
[FIG. 13] FIG. 13 is a diagram illustrating an example of transmission of a HARQACK
responsive to an SPDSCH and HARQ-ACK responsive to a POSCH.
[FIG. 14] FIG. 14 is a diagram illustrating an example of resource element mapping
of an SPDCCH and/or an SPDSCJ I.
30 [FIG. 15] FIG. 15 is a block diagram illustrating a first example of a schematic
configuration of an eNB to which the technology according to the present disclosure
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may be applied.
[FIG. 16] FIG. 16 is a block diagram illustrating a second example of the schematic
configuration ofthe,eNB to which the technology according to the present disclosure
may be applied.
5 [FIG. 17] FIG. 17 is a block diagram illustrating an example of a schematic
configuration of a smartphone 900 to which the technology according to the present
disclosure may be applied.
[FIG. 18] FIG. 18 is a block diagram illustrating an example of a schematic
configuration of a car navigation apparatus 920 to which the technology according to
10 the present disclosure may be applied.
Mode(s) for Carrying Out the Invention
[0017]
Hereinafter, (a) preferred embodiment(s) of the present disclosure will be
15 described ·in· dctail·with reference to the appended drawings. Note that, in this
specification and the appended drawings, structural elements that have substantially
the same function and structure are denoted with the same reference numerals, and
repeated explanation of these structural elements is omitted.
[00 18]
20
In the present embodiment, a wireless communication system includes at
least a base station device I and a terminal device 2. The base station device I can
accommodate multiple terminal devices. The base station device I can be
connected with another base station device by means of an X2 interface. Ftuiher,
25 the base station device I can be connected to an evolved packet core (EPC) by means
of an S I interf.1ce. Fmiher, the base station device I can be connected to a mobility
management entity (MME) by means of an S 1-MME interface and can be connected
to a serving gateway (S-GW) by means of an S 1-U interface. The S I interf.1ce
supports many-to-many connection between the MME and/or the S-GW and the base
30 station device I.
[0019]
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In the present embodiment, a radio frame configured with 10 ms
(milliseconds} · .. :present embodiment. The diagram illustrated in .I'IG 2. is also referred to as an
uplink resource grid. The terminal device 2 can transmit an uplink physical channel
5 and/or an uplink physical signal in the uplink sub frame from the terminal device 2 to
the base station device I. The uplink physical channel includes a physical uplink
shared channel (PUSCH), a physical uplink control channel (PUCCI-I), a physical
random access channel (PRACI-1), and the like. The uplink physical signal includes
a reference signal (RS).
10 [0032)
The reference signal in the uplink includes an uplink demodulation signal
(UL-DMRS), a sounding reference signal (SRS), and the like. The UL-DMRS is
associated with transmission of the PUSCH or the PUCCH. The SRS is not
associated with transmission of the PUSCH or the PUCCI-I.
15 [0033)
The downlink physical channel and the downlink physical signal are
referred to collectively as a downlink signal. The uplink physical channel and the
uplink physical signal are referred to collectively as an uplink signal. The downlink
physical channel and the uplink physical channel are referred to collectively as a
20 physical channel. The downlink physical signal and the uplink physical signal are
referred to collectively as a physical signal.
[0034)
The BCI-1, the MCH, the UL-SCH, and the DL-SCH are transport channels.
The channel used in the medium access control (MAC) layer is referred to as a
25 transport channel. A unit of the transport channel used in the MAC layer is also
referred to as a transport block (TB) or a MAC protocol data unit (MAC PDU). In
the MAC layer, control of a hybrid automatic repeal request (HARQ) is performed
for each transport block. The transport block is a unit of data that the MAC layer
transfers (delivers) to the physical layer. In the physical layer, the transport block is
30 mapped to a codeword, and an encoding process is performed for each codeword.
[0035)
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In the present embodiment, one slot is defined by a plurality of symbols.
The physical signal or the physical channeL·transmitted in each of the slots is
represented by a resource grid. In the downlink, the resource grid is defined by a
5 plurality of sub carriers in a frequency direction and a plurality ofOFDM symbols in
a time direction. In the uplink, the resource grid is defined by a plurality of sub
carriers in the fi·equency direction and a plurality of SC-FDMA symbols in the time
direction. The number of sub carriers or the number of resource blocks may be
decided depending on a bandwidth of a cell. The number of symbols in one slot is
10 decided by a type of cyclic prefix (CP). The type of CP is a normal CP or an
extended CP. In the normal CP, the number of OFDM symbols or SC-FDMA
symbols constituting one slot is 7. In the extended CP, the number of OFDM
symbols or SC-FDMA symbols constituting one slot is 6. Each element in the
resource grid is referred to as a resource element. The resource element is
15 identified ·using ·an ·index (number) of a sub carrier and an index (number) of a
symbol. Fmiher, in the description of the present embodiment, the OFDM symbol
or SC-FDMA symbol is also referred to simply as a symbol.
[0036]
The resource blocks are used for mapping to resource elements of a certain
20 physical channel (the POSCH, the PUSCH, or the like). The resource blocks
include vitiual resource blocks and physical resource blocks. A cetiain physical
channel is mapped to a vitiual resource block. The vitiual resource blocks are
mapped to physical resource blocks. One physical resource block is defined by a
predetermined number of consecutive symbols in the time domain. One physical
25 resource block is defined fi·om a predetermined number of consecutive sub carriers in
the frequency domain. The number of symbols and the number of sub carriers in
one physical resource block are decided on the basis of a parameter set in accordance
with a type of CP, a sub carrier interval, and/or a higher layer in the cell. For
example, in a case in which the type of CP is the normal CP, and the sub carrier
30 interval is 15 kHz, the number of symbols in one physical resource block is 7, and
the number of sub carriers is 12. In this case, one physical resource block includes
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(7x 12) resource elements. The physical resource blocks are numbered ft·om 0 in the
frequency domain. Flltther, two resource blocks in one sub frame corresponding to
the same physical resource block number are defined as a physical resource block
pair (a PRB pair or an RB pair).
5 [0037]
A resource element group (REG) is used to define mapping of the resource
element and the control channel. For example, the REG is used for mapping of the
PDCCH, the PHICH, or the PCFICH. The REG is constituted by four consecutive
resource elements which are in the same OFDM symbol and not used for the CRS in
10 the same resource block. Furthe1; the REG is constituted by first to fourth OFDM
symbols in a first slot in a ce1tain sub frame.
[0038]
An enhanced resource clement group (EREG) is used to define mapping of
the resource elements and the enhanced control channel. For example, the EREG is
15 used for mapping e>f the EPDCCH. One resource block pair is constituted by 16
EREGs. Each EREG is assigned a number of 0 to 15 for each resource block pair.
Each EREG is constituted by 9 resource elements excluding resource elements used
for the DM-RS associated with the EPDCCH in one resource block pair.
[0039]
20
An antenna pmt is defined so that a propagation channel carrying a ce1tain
symbol can be inferred from a propagation channel carrying another symbol in the
same antenna port. For example, different physical resources in the same antenna
pmt can be assumed to be transmitted through the same propagation channel. In
25 other words, for a symbol in a certain antenna port, it is possible to estimate and
demodulate a propagation channel in accordance with the reference signal in the
antenna port. Further, there is one resource grid for each antenna port. The
antenna port is defined by the reference signal. Fwther, each reference signal can
define a plurality of antenna pmts.
30 [0040]
In a case in which two antenna pmts satisf)' a predetermined condition, the
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two antenna p01ts can be regarded as being a quasi co-location (QCL). The
predetermined condition is that a wide area characteristic of a propagation channel
carrying a symbol in one .antenna port can be inferred fi·om a propagation channel
carrying a symbol in another antenna p01t. The wide area characteristic includes a
5 delay dispersion, a Doppler spread, a Doppler shift, an average gain, and/or an
average delay.
[0041]

The PBCH is used to broadcast a master information block (MIB) which is
10 broadcast information specific to a serving cell of the base station device I. The
PBCH is transmitted only through the sub fi·ame 0 in the radio frame. The MIB can
be updated at intervals of 40 ms. The PBCH is repeatedly transmitted with a cycle
of I 0 ms. Specifically, initial transmission of the MIB is performed in the sub
frame 0 in the radio frame satisf}'ing a condition that a remainder obtained by
15 dividing a system fhune number (SFN) by 4 is 0, and retransmission (repetition) of
the MIB is performed in the sub fi·ame 0 in all the other radio ft·ames. The SFN is a
radio frame number (system fi·ame number). The MIB is system information. For
example, the. MIB includes information indicating the SFN.
[0042]
20 The PCFICH is used to transmit information related to the number of
25
OFDM symbols used for transmission of the PDCCH. A region indicated by
PCFICH is also referred to as a PDCCH region. The information transmitted
through the PCFICH is also referred to as a control format indicator (CFI).
[0043]
The PHICH is used to transmit an HARQ-ACK (an HARQ indicator,
HARQ feedback, and response information) indicating ACKnowledgment (ACK) or
negative ACKnowledgment (NACK) of uplink data (an uplink shared channel (ULSCH))
received by the base station device I. For example, in a case in which the
HARQ-ACK indicating ACK is received, corresponding uplink data is not
30 retransmitted. For example, in a case in which the terminal device 2 receives the
HARQ-ACK indicating NACK, the terminal device 2 retransmits corresponding
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uplink data through a predetermined uplink sub fi·ame. A certain·PHICH transmits
the HARQ-ACK for certain uplink data. The base station device I transmits each
HARQ-ACK to a plurality of pieces of uplink data included in the same PUSCH
using a plurality ofPHICHs.
5 (0044]
The POCCH and the EPOCCH are used to transmit downlink control
information (OCI). Mapping of an information bit of the downlink control
information is defined as a OCI format. The downlink control information includes
a downlink grant and an uplink grant. The downlink grant is also referred to as a
10 downlink assignment or a downlink allocation.
(0045]
The POCCH is transmitted by a set of one or more consecutive control
channel elements (CCEs). The CCE includes 9 resource element groups (REGs).
An REG includes 4 resource elements. In a case in which the POCCH is
15 constituted by"n consecutive CCEs, the POCCH statts with a CCE satisfying a
condition that a remainder after dividing an index (number) i of the CCE by n is 0.
[0046]
The EPOCCH is transmitted by a set of one or more consecutive enhanced
control channel elements (ECCEs). The ECCE is constituted by a plurality of
20 enhanced resource element groups (EREGs).
[0047]
The downlink grant is used for scheduling of the POSCH in a certain cell.
The downlink grant is used for scheduling of the POSCH in the same sub frame as a
sub fi
A synchronization signal is used for the terminal device 2 to obtain
25 downlink synchronization in the frequency domain and/or the time domain. The
synchronization signal includes a primary synchronization signal (PSS) and a
secondary synchronization signal (SSS). The synchronization signal is placed in a
predetermined sub frame in the radio fi·ame. For example, in the TOO scheme, the
synchronization signal is placed in the sub fi·ames 0, I, 5, and 6 in the radio frame.
30 In the FDD scheme, the synchronization signal is placed in the sub frames 0 and 5 in
the radio frame.
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[0053)
The PSS may be used for coarse frame/timing synchronization
(synchronization in .the time domain) or cell group identification .. · . .The ·SSS may be
used for more accurate frame timing synchronization or cell identification. In other
5 words, frame timing synchronization and cell identification can be performed using
the PSS and the SSS.
[0054)
The downlink reference signal is used for the terminal device 2 to perform
propagation path estimation of the downlink physical channel, propagation path
10 correction, calculation of downlink channel state information (CSI), and/or
measurement of positioning of the terminal device 2.
[0055)
The CRS is transmitted in the entire band of the sub fi·ame. The CRS is
used for receiving (demodulating) the PBCH, the PDCCH, the PH!CH, the PCFICH,
15 and the POSCH. The CRS may be used for the terminal device 2 to calculate the
downlink channel state information. The PBCH, the PDCCH, the PHICH, and the
PCFICH are transmitted through the antenna port used for transmission of the CRS.
The CRS suppmts the antenna pmt configurations of I, 2, or 4. The CRS is
transmitted through one or more of the antenna ports 0 to 3.
20 [0056)
The URS associated with the POSCH is transmitted through a sub frame
and a band used for transmission of the POSCH with which the URS is associated.
The URS is used for demodulation of the POSCH to which the URS is associated.
The URS associated with the POSCH is transmitted through one or more of the
25 antenna ports 5 and 7 to 14.
[0057)
The POSCH is transmitted through an antenna pmt used for transmission of
the CRS or the URS on the basis of the transmission mode and the DC! format. A
DCI format lA is used for scheduling of the POSCH transmitted through an antenna
30 pmt used for transmission of the CRS. A DC! format 20 is used for scheduling of
the POSCH transmitted through an antenna port used for transmission of the URS.
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[0058]
The DMRS associated with the EPDCCI-1 is transmitted through a sub frame
and a band.uscd for transmission of the EPDCCI-I to which. the DMRS.is associated.
The DMRS is used for demodulation of the EPDCCH with which the DMRS is
5 associated. The EPDCCH is transmitted through an antenna port used for
transmission of the DMRS. The DMRS associated with the EPDCCH is
transmitted through one or more of the antenna potis 107 to 114.
[0059]
The CSI-RS is transmitted through a set sub frame. The resources in
10 which the CSI-RS is transmitted are set by the base station device I. The CSI-RS is
used for the terminal device 2 to calculate the downlink channel state information.
The terminal device 2 performs signal measurement (channel measurement) using
the CSI-RS. The CSI-RS suppmis setting of some or all of the antenna pmis I, 2, 4,
8, 12, 16, 24, and 32. The CSI-RS is transmitted through one or more of the
15 antenna ports--!5·to46. Fmihet; an antenna port to be suppmied may be decided on
the basis of a terminal device capability of the terminal device 2, setting of an RRC
parameter, and/or a transmission mode to be set
[0060]
Resources of the ZP CSI-RS arc set by a higher layer. Resources of the ZP
20 CSI-RS are transmitted with zero output power. In other words, the resources of the
ZP CSI-RS are not transmitted. The ZP POSCH and the EPDCCH are not
transmitted in the resources in which the ZP CSI-RS is set For example, the
resources of the ZP CSI-RS are used for a neighbor cell to transmit the NZP CSI-RS.
Futiher, for example, the resources of the ZP CSI-RS arc used to measure the CSI-IM.
25 [0061]
Resomces of the CSI-IM are set by the base station device I. The
resources of the CSI-IM are resources used for measuring interference in CSI
measurement. The resources of the CSI-IM can be set to overlap some of the
resources of the ZP CSI-RS. For example, in a case in which the resources of the
30 CSI-IM are set to overlap some of the resources of the ZP CSI-RS, a signal fi·mn a
cell performing the CSI measurement is not transmitted in the resources. In other
5
10
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words, the base station device I does not transmit the POSCH, the EPOCCH, or the
like in the resources set by the CSJ-IM. Therefore, the terminal device 2 can
. perform the CSI measurement efficiently.
[0062]
·,., ..
The MBSFN RS is transmitted in the entire band of the sub fi·ame used for
transmission of the PMCH. The MBSFN RS is used for demodulation of the
PMCH. The PMCH is transmitted through an antenna pmi used for transmission of
the MBSFN RS. The MBSFN RS is transmitted through the antenna port 4.
[0063]
The PRS is used for the terminal device 2 to measure positioning of the
terminal device 2. The PRS is transmitted through the antenna po1i 6.
[0064]
The TRS can be mapped only to predetermined sub frames. For example,
the TRS is mapped to the sub frames 0 and 5. Fmihe1~ the TRS can use a
15 configuration similar to a part or all of the CRS. For example, in each resource
block, a position of a resource element to which the TRS is mapped can be caused to
coincide with a position of a resource element to which the CRS of the antenna port
0 is mapped. Fmihe1~ a sequence (value) used for the TRS can be decided on the
basis of information set through the PBCH, the POCCH, the EPOCCH, or the
20 POSCH (RRC signaling). A sequence (value) used for the TRS can be decided on
the basis of a parameter such as a cell 10 (for example, a physical layer cell
identifier), a slot number, or the like. A sequence (value) used for the TRS can be
decided by a method (formula) different from that of a sequence (value) used for the
CRS of the antenna port 0.
25 [0065]

The PUCCI! is a physical channel used for transmitting uplink control
information (UCJ). The uplink control information includes downlink channel state
intormation (CSJ), a scheduling request (SR) indicating a request for PUSCH
30 resources, and a HARQ-ACK to downlink data (a transport block (TB) or a
downlink-shared channel (OL-SCH)). The HARQ-ACK is also referred to as
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ACK/NACK, HARQ feedback, or response information. Further, the HARQ-ACK
to downlink data indicates ACK, NACK, or DTX.
' .. [0066] .'J.
The PUSCH is a physical channel used for transmitting uplink data (uplink-
5 shared channel (UL-SCH)). Ftuiher, the PUSCH may be used to transmit the
HARQ-ACK and/or the channel state information together with uplink data.
Fm1her; the PUSCH may be used to transmit only the channel state information or
only the HARQ-ACK and the channel state information.
[0067]
10 The PRACH is a physical channel used for transmitting a random access
preamble. The PRACH can be used for the terminal device 2 to obtain
synchronization in the time domain with the base station device I. Fmiher; the
PRACH is also used to indicate an initial connection establishment procedure
(process), a handover procedure, a connection re-establishment procedure,
15 synchronization (timing adjustment) for uplink transmission, and/or a request for
PUSCH resources.
[0068]
In the PUCCH region, a plurality of PUCCHs are fiequency, time, space,
and/or code multiplexed. In the PUSCH region, a plurality of PUSCI-ls may be
20 fi·equency, time, space, and/or code multiplexed. The PUCCH and the PUSCH may
be frequency, time, space, and/or code multiplexed. The PRACH may be placed
over a single sub frame or two sub frames. A plurality of PRACHs may be codemultiplexed.
[0069]
25
The uplink DMRS is associated with transmission of the PUSCH or the
PUCCH. The DMRS is time-multiplexed with the PUSCH or the PUCCI-I. The
base station device I may use the DMRS to perform the propagation path correction
of the PUSCH or the PUCCI·!. In the description of the present embodiment, the
30 transmission of the PUSCH also includes multiplexing and transmitting the PUSCH
and DMRS. In the description of the present embodiment, the transmission of the
SP3GG587WOOO
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PUCCH also includes multiplexing and transmitting the PUCCH and the DMRS.
Further, the uplink DMRS is also referred to as an UL-DMRS. The SRS is not
associated with the transmission of the. PUSCH or the PUCCH. The base station
device I may usc the SRS to measure the uplink channel state.
5 [0070]
The SRS is transmitted using the last SC-FDMA symbol in the uplink sub
frame. In other words, the SRS is placed in the last SC-FDMA symbol in the uplink
sub frame. The terminal device 2 can restrict simultaneous transmission of the SRS,
the PUCCH, the PUSCH, and/or the PRACH in a cettain SC-FDMA symbol of a
10 cetiain cell. The terminal device 2 can transmit the PUSCH and/or the PUCCH
using the SC-FDMA symbol excluding the last SC-FDMA symbol in a certain uplink
sub frame of a ccttain cell in the uplink sub frame and transmit the SRS using the last
SC-FDMA symbol in the uplink sub frame. In other words, the terminal device 2
can transmit the SRS, the PUSCH, and the PUCCH in a cettain uplink sub frame of a
15 cettain cell.
[0071)
In the SRS, a trigger type 0 SRS and a trigger type I SRS are defined as
SRSs having different trigger types. The trigger type 0 SRS is transmitted in a case
in which a parameter related to the trigger type 0 SRS is set by signaling of a higher
20 layer. The trigger type I SRS is transmitted in a case in which a parameter related
to the trigger type l SRS is set by signaling of the higher Ia yet; and transmission is
requested by an SRS request included in the DCI format 0, l A, 2B, 2C, 20, or 4.
Fmther, the SRS request is included in both FDD and TDD for the DCI format 0, I A,
or 4 and included only in TDD for the DCI format 2B, 2C, or 20. In a case in
25 which the transmission of the trigger type 0 SRS and the transmission of the trigger
type l SRS occur in the same sub frame of the same serving cell, a priority is given
to the transmission of the trigger type l SRS.
[0072)

30 FIG. 3 is a schematic block diagram illustrating a configuration of the base
station device I of the present embodiment. As illustrated in FIG. 3, the base
SP3GG587WOOO
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station device I includes a higher layer processing unit 101, a control unit 103, a
receiving unit I 05, a transmitting unit 107, and a transceiving antenna I 09. Futiher,
the receiving unit 105 includes a decoding. unit I 051, a demodulating unit I 053, a
demultiplexing unit I 055, a wireless receiving unit I 057, and a channel measuring
5 unit 1059. Fmiher, the transmitting unit 107 includes an encoding unit 1071, a
modulating unit 1073, a multiplexing unit 1075, a wireless transmitting unit 1077,
and a downlink reference signal generating unit 1079.
[0073]
The higher layer processing unit I 0 I performs processes of a medium
10 access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a
radio link control (RLC) layer, and a radio resource control (RRC) layer. Fmiher,
the higher layer processing unit 10 I generates control information to control the
receiving unit 105 and the transmitting unit 107 and outputs the control information
to the control unit I 03.
15 [0074]
The control unit 103 controls the receiving unit 105 and the transmitting
unit 107 on the basis of the control information from the higher layer processing unit
I 0 I. The control unit I 03 generates control information to be transmitted to the
higher layer processing unit 101 and outputs the control information to the higher
20 layer processing unit I 0 I. The control unit I 03 receives a decoded signal from the
decoding unit I 051 and a channel estimation result from the channel measuring unit
1059. The control unit 103 outputs a signal to be encoded to the encoding unit 1071.
Futihet; the control unit I 03 may be used to control the whole or a part of the base
station device 1.
25 [0075]
The higher layer processing unit I 0 I performs a process and management
related to radio resource control, sub thune setting, scheduling control, and/or CSI
repott control. The process and the management in the higher layer processing unit
101 arc perfonned for each terminal device or in common to terminal devices
30 connected to the base station device. The process and the management in the higher
layer processing unit 101 may be performed only by the higher layer processing unit
SP366587WOOO
231120
I 0 I or may be acquired from a higher node or another base station device.
[0076]
In the radio resource control. in the higher layer processing unit 101,
generation and/or management of downlink data (transpmt block), system
5 information, an RRC message (RRC parameter), and/or a MAC control element (CE)
are performed.
[0077]
In a sub frame setting in the higher layer processing unit 101, management
of a sub frame setting, a sub fi'ame pattern setting, an uplink-downlink setting, an
10 uplink reference UL-OL setting, and/or a downlink reference UL-OL setting is
performed. Fmther, the sub frame setting in the higher layer processing unit I 0 I is
also referred to as a base station sub frame setting. Further, the sub frame setting in
the higher layer processing unit I 0 I can be decided on the basis of an uplink traffic
volume and a downlink traffic volume. Further; the sub fiame setting in the higher
15 layer processing .. unit 101 can be decided on the basis of a scheduling result of
scheduling control in the higher layer processing unit I 0 I.
[0078]
In the scheduling control in the higher layer processing unit 101, a
fi·equency and a sub fi·ame to which the physical channel (the POSCH and the
20 PUSCH) is allocated, a coding rate, a modulation scheme, and transmission power of
the physical channels (the POSCH and the PUSCH), and the like are decided on the
basis of the received channel state information, an estimation value, a channel quality,
or the like of a propagation path input fi·om the channel measuring unit I 059, and the
like. For example, the control unit I 03 generates the control information (OCI
25 format) on the basis of the scheduling result of the scheduling control in the higher
layer processing unit I 0 I.
[0079]
In the CSJ report control in the higher layer processing unit I 0 I, the CSI
report of the terminal device 2 is controlled. For example, a setting related to the
30 CSJ reference resources assumed to calculate the CSJ in the terminal device 2 is
controlled.
SP366587WOOO
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[0080]
Under the control from the control unit I 03, the receiving unit I 05 receives
a signal transmitted .fi·om .the terminal device 2 via the transceiving antenna I 09, -:
performs a reception process such as demultiplexing, demodulation, and decoding,
5 and outputs information which has undergone the reception process to the control
unit I 03. Fmther, the reception process in the receiving unit I 05 is performed on
the basis of a setting which is specified in advance or a setting notified from the base
station device I to the terminal device 2.
10
[0081]
The wireless receiving unit I 057 performs conversion into an intermediate
fi·equency (down conversion), removal of an unnecessary frequency component,
control of an amplification level such that a signal level is appropriately maintained,
quadrature demodulation based on an in-phase component and a quadrature
component of a received signal, conversion from an analog signal into a digital
15 signal, removal·of a guard interval (Gl), and/or extraction of a signal in the frequency
domain by fast Fourier transform (FFT) on the uplink signal received via the
transceiving antenna I 09.
[0082]
The demultiplexing unit I 055 separates the uplink channel such as the
20 PUCCH or the PUSCH and/or uplink reference signal from the signal input fi·om the
wireless receiving unit I 057. The demultiplexing unit I 055 outputs the uplink
reference signal to the channel measuring unit I 059. The demultiplexing unit I 055
compensates the propagation path for the uplink channel from the estimation value of
the propagation path input from the channel measuring unit I 059.
25 [0083]
The demodulating unit I 053 demodulates the reception signal for the
modulation symbol of the uplink channel using a modulation scheme such as binary
phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 quadrature
amplitude modulation (QAM), 64 QAM, or 256 QAM. The demodulating unit
30 I 053 performs separation and demodulation of a MIMO multiplexed uplink channel.
[0084]
SP366587\VOOO
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The decoding unit I 051 performs a decoding process on encoded bits of the
demodulated uplink channel. The decoded uplink data and/or uplink control
information.are.outpuUo the control unit 103. The decoding unit 1051 performs a
decoding process on the PUSCH for each transport block.
5 [0085]
The channel measuring unit I 059 measures the estimation value, a channel
quality, and/or the like of the propagation path from the uplink reference signal input
fi·om the demultiplexing unit I 055, and outputs the estimation value, a channel
quality, and/or the like of the propagation path to the demultiplexing unit I 055 and/or
10 the control unit I 03. For example, the estimation value of the propagation path for
propagation path compensation for the PUCCI-I or the PUSCH is measured through
the UL-DMRS, and an uplink channel quality is measured through the SRS.
[0086]
The transmitting unit 107 carnes out a transmission process such as
15 encoding, ·modulation, and multiplexing on downlink control infonnation and
downlink data input from the higher layer processing unit 101 under the control of
the control unit 103. For example, the transmitting unit 107 generates and
multiplexes the PHICH, the PDCCH, the EPDCCH, the POSCH, and the downlink
reference signal and generates a transmission signaL Fmihet; the transmission
20 process in the transmitting unit I 07 is performed on the basis of a setting which is
specified in advance, a setting notified fi·om the base station device I to the terminal
device 2, or a setting notified through the PDCCH or the EPDCCH transmitted
through the same sub frame.
25
[0087]
The encoding unit 1071 encodes the HARQ indicator (HARQ-ACK), the
downlink control information, and the downlink data input from the control unit I 03
using a predetermined coding scheme such as block coding, convolutional coding,
turbo coding, or the like. The modulating unit I 073 modulates the encoded bits
input from the encoding unit I 071 using a predetermined modulation scheme such as
30 BPSK, QPSK, 16 QAM, 64 QAM, or 256 QAM. The downlink reference signal
generating unit I 079 generates the downlink reference signal on the basis of a
SP366587WOOO
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physical cell identification (PC!), an RRC parameter set in the terminal device 2, and
the like. The 1imltiplexing unit I 075 multiplexes a modulated symbol and the
.downlink. reference signal of each channel and arranges. resulting·· data in a
predetermined resource element.
5 [0088]
The wireless transmitting unit I 077 performs processes such as conversion
into a signal in the time domain by inverse fast Fourier transform (IFFT), addition of
the guard inte1·val, generation of a baseband digital signal, conversion in an analog
signal, quadrature modulation, conversion from a signal of an intermediate frequency
10 into a signal of a high frequency (up conversion), removal of an extra fi·equency
component, and amplification of power on the signal fi·om the multiplexing unit I 075,
and generates a transmission signal. The transmission signal output from the
wireless transmitting unit 1077 is transmitted through the transceiving antenna 109.
[0089]
15
FIG. 4 is a schematic block diagram illustrating a configuration of the
terminal device 2 of the present embodiment. As illustrated in FIG. 4, the terminal
device 2 includes a higher layer processing unit 20 I, a control unit 203, a receiving
unit 205, a transmitting unit 207, and a transceiving antenna 209. Furthe1~ the
20 receiving unit 205 includes a decoding unit 2051, a demodulating unit 2053, a
demultiplexing unit 2055, a wireless receiving unit 2057, and a channel measuring
unit 2059. Fm1her, the transmitting unit 207 includes an encoding unit 2071, a
modulating unit 2073, a multiplexing unit 2075, a wireless transmitting unit 2077,
and an uplink reference signal generating unit 2079.
25 [0090]
The higher layer processing unit 201 outputs uplink data (transpmt block) to
the control unit 203. The higher layer processing unit 201 performs processes of a
medium access control (MAC) layer, a packet data convergence protocol (PDCP)
layer, a radio link control (RLC) layer, and a radio 1·esource control (RRC) layer.
30 Fmthe1; the higher layer processing unit 201 generates control information to control
the receiving unit 205 and the transmitting unit 207 and outputs the control
SP366587WOOO
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information to the control unit 203.
[0091]
.... 'fhe .control unit 203 controls the receiving unit 205 andcthe. transmitting
unit 207 on the basis of the control information from the higher layer processing unit
5 201. The control unit 203 generates control information to be transmitted to the
higher layer processing unit 20 I and outputs the control information to the higher
layer processing unit 20 I. The control unit 203 receives a decoded signal fi·om the
decoding unit 2051 and a channel estimation result from the channel measuring unit
2059. The control unit 203 outputs a signal to be encoded to the encoding unit 2071.
10 Fwthet; the control unit 203 may be used to control the whole or a patt of the
terminal device 2.
[0092]
The higher layer processing unit 201 performs a process and management
related to radio resource control, sub fi-ame setting, scheduling control, and/or CSI
15 repmt control. ·The·process and the management in the higher layer processing unit
20 I are performed on the basis of a setting which is specified in advance and/or a
setting based on control information set or notified fi·om the base station device I.
For example, the control information fi·om the base station device I includes the
RRC parameter, the MAC control element, or the DC!.
20 [0093]
In the radio resource control in the higher layer processing unit 201, the
setting information in the terminal device 2 is managed. In the radio resource
control in the higher layer processing unit 20 I, generation and/or management of
uplink data (transpmt block), system information, an RRC message (RRC parameter),
25 and/or a MAC control element (CE) are performed.
[0094]
In the sub fi·ame setting in the higher layer processing unit 20 I, the sub
frame setting in the base station device I and/or a base station device different fi·om
the base station device I is managed. The sub frame setting includes an uplink or
30 downlink setting for the sub fi·ame, a sub fi·ame pattern setting, an uplink-downlink
setting, an uplink reference UL-DL setting, and/or a downlink reference UL-DL
SP366587WOOO
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setting. Further, the sub fi·ame setting in the higher layer processing unit 20 I is also
referred to as a terminal sub fi·ame setting.
[0095J .·. ;:··.,
In the scheduling control in the higher layer processing unit 20 I, control
5 information for controlling scheduling on the receiving unit 205 and the transmitting
unit 207 is generated on the basis of the DC! (scheduling information) from the base
station device I.
[0096)
In the CSI repmt control in the higher layer processing unit 20 l, control
10 related to the report of the CSI to the base station device l is performed. For
example, in the CSI report control, a setting related to the CSI reference resources
assumed for calculating the CSI by the channel measuring unit 2059 is controlled.
In the CSI repmt control, resource (timing) used for repmting the CSI is controlled
on the basis of the DC! and/or the RRC parameter.
15 [0097]
Under the control fi·om the control unit 203, the receiving unit 205 receives
a signal transmitted fi'Om the base station device I via the transceiving antenna 209,
performs a reception process such as demultiplexing, demodulation, and decoding,
and outputs information which has undergone the reception process to the control
20 unit 203. Fmther, the reception process in the receiving unit 205 is performed on
the basis of a setting which is specified in advance or a notification fi·om the base
station device I or a setting.
(0098)
The wireless receiving unit 2057 performs conversion into an intermediate
25 frequency (down conversion), removal of an unnecessary frequency component,
control of an amplification level such that a signal level is appropriately maintained,
quadrature demodulation based on an in-phase component and a quadrature
component of a received signal, conversion fi·om an analog signal into a digital
signal, removal of a guard interval (GI), and/or extraction of a signal in the fi·equency
30 domain by fast Fourier transform (FFT) on the uplink signal received via the
transceiving antenna 209.
SP366587WOOO
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[0099]
The demultiplexing unit 2055 separates the downlink channel such as the
PHICH, PDCCI-1, EPDCCH, or POSCH, downlinLsynchronization signal and/or
downlink reference signal 11-om the signal input from. the wireless receiving unit 2057.
5 The demultiplcxing unit 2055 outputs the uplink reference signal to the channel
measuring unit 2059. The demultiplexing unit 2055 compensates the propagation
path for the uplink channel fi·om the estimation value of the propagation path input
from the channel measuring unit 2059.
10
15
[0 I 00]
The demodulating unit 2053 demodulates the reception signal for the
modulation symbol of the downlink channel using a modulation scheme such as
BPSK, QPSK, 16 QAM, 64 QAM, or 256 QAM. The demodulating unit 2053
performs separation and demodulation of a MIMO multiplexed downlink channel.
[0 10 I]
The-decoding unit 2051 performs a decoding process on encoded bits of the
demodulated downlink channel. The decoded downlink data and/or downlink
control information arc output to the control unit 203. The decoding unit 205 I
performs a decoding process on the POSCH for each transport block.
[0102]
20 The channel measuring unit 2059 measures the estimation value, a channel
quality, and/or the like of the propagation path fi'Om the downlink reference signal
input fi·om the dcmultiplexing unit 2055, and outputs the estimation value, a channel
quality, and/or the like of the propagation path to the demultiplexing unit 2055 and/or
the control unit 203. The downlink reference signal used for measurement by the
25 channel measuring unit 2059 may be decided on the basis of at least a transmission
mode set by the RRC parameter and/or other RRC parameters. For example, the
estimation value of the propagation path for performing the propagation path
compensation on the POSCH or the EPOCCH is measured through the OL-DMRS.
The estimation value of the propagation path for performing the propagation path
30 compensation on the POCCH or the POSCH and/or the downlink channel for
repmting the CSI are measured through the CRS. The downlink channel for
;:·
5
SP366587WOOO
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reporting the CSJ is measured through the CSI-RS. The channel measuring unit
2059 calculates a reference signal received power (RSRP) and/or a reference signal
received quality (RSRQ) on the basis of the CRS, .the CSI -RS, or the discovery
signal, and outputs the RSRP and/or the RSRQ to the higher layer processing unit
201.
[01 03]
The transmitting unit 207 performs a transmission process such as encoding,
modulation, and multiplexing on the uplink control information and the uplink data
input from the higher layer processing unit 20 I under the control of the control unit
10 203. For example, the transmitting unit 207 generates and multiplexes the uplink
channel such as the PUSCH or the PUCCH and/or the uplink reference signal, and
generates a transmission signal. Fmthet; the transmission process in the
transmitting unit 207 is performed on the basis of a setting which is specified in
advance or a setting set or notified fi·om the base station device 1.
15 [0104]
The encoding unit 2071 encodes the HARQ indicator (HARQ-ACK), the
uplink control information, and the uplink data input from the control unit 203 using
a predetermined coding scheme such as block coding, convolutional coding, turbo~
coding, or the like. The modulating unit 2073 modulates the encoded bits input
20 from the encoding unit 2071 using a predetermined modulation scheme such as
BPSK, QPSK, 16 QAM, 64 QAM, or 256 QAM. The uplink reference signal
generating unit 2079 generates the uplink reference signal on the basis of an RRC
parameter set in the terminal device 2, and the like. The multiplexing unit 2075
multiplexes a modulated symbol and the uplink reference signal of each channel and
25 arranges resulting data in a predetermined resource element.
[0 I 05]
The wireless transmitting unit 2077 performs processes such as conversion
into a signal in the time domain by inverse fast Fourier transform (IFFT), addition of
the guard interval, generation of a baseband digital signal, conversion in an analog
30 signal, quadrature modulation, conversion fi-om a signal of an intermediate fi·equency
into a signal of a high frequency (up conversion), removal of an extra frequency
SP366587WOOO
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component, and amplification of power on the signal from the multiplexing unit 2075,
and generates a transmission signal. The transmission signal output from the
wireless transmitting unit 2077 is transmitted through the transceiving antenna 209.
(0 I 06]
5
The base station device I and the terminal device 2 can use various methods
for signaling (notification, broadcasting, or setting) of the control information. The
signaling of the control information can be performed in various layers (layers).
The signaling of the control information includes signaling of the physical layer
10 which is signaling performed through the physical layer, RRC signaling which is
signaling performed through the RRC layer, and MAC signaling which is signaling
performed through the MAC layer. The RRC signaling is dedicated RRC signaling
for notifying the terminal device 2 of the control information specific or a common
RRC signaling for notifying of the control information specific to the base station
15 device I. The signaling used by a layer higher than the physical layer such as RRC
signaling and MAC signaling is also referred to as signaling of the higher layer.
[0 I 07]
The RRC signaling is implemented by signaling the RRC parameter. The
MAC signaling is implemented by signaling the MAC control element. The
20 signaling of the physical layer is implemented by signaling the downlink control
information (OCI) or the uplink control information (UCI). The RRC parameter
and the MAC control element arc transmitted using the POSCH or the PUSCH.
The OCI is transmitted using the PDCCH or the EPDCCH. The UCJ is transmitted
using the PUCCH or the PUSCH. The RRC signaling and the MAC signaling arc
25 used for signaling semi-static control information and are also referred to as semistatic
signaling. The signaling of the physical layer is used for signaling dynamic
control information and also referred to as dynamic signaling. The OCT is used for
scheduling of the POSCH or scheduling of the PUSCH. The UCI is used for the
CSI report, the HARQ-ACK repmt, and/or the scheduling request (SR).
30 (0108]

SP366587WOOO
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The DCI is notified using the DCI format having a field which is specified
in advance. Predetermined information bits are mapped to the field specified in the
DCI format. The DCI notifies of. downlink scheduling information, uplink
scheduling information, side! ink scheduling information, a request for a non-periodic
5 CSI report, or an uplink transmission power command.
[01 09]
The DCI format monitored by the terminal device 2 is decided in
accordance with the transmission mode set for each serving cell. In other words, a
patt of the DCI format monitored by the terminal device 2 can differ depending on
10 the transmission mode. For example, the terminal device 2 in which a downlink
transmission mode I is set monitors the DC! format lA and the DC! format I. For
example, the terminal device 2 in which a downlink transmission mode 4 is set
monitors the DC! format lA and the DCI format 2. For example, the terminal
device 2 in which an uplink transmission mode I is set monitors the DC! fonnat 0.
15 For example;· the tenninal device 2 in which an uplink transmission mode 2 is set
monitors the DC! format 0 and the DC! format 4.
[0 [ 10]
A control region in which the PDCCH for notifying the terminal device 2 of
the DC! is placed is not notified of, and the terminal device 2 detects the DC! for the
20 terminal device 2 through blind decoding (blind detection). Specifically, the
terminal device 2 monitors a set of PDCCH candidates in the serving cell. The
monitoring indicates that decoding is attempted in accordance with all the DC!
formats to be monitored for each of the PDCCHs in the set. For example, the
terminal device 2 attempts to decode all aggregation levels, PDCCH candidates, and
25 DC! formats which are likely to be transmitted to the terminal device 2. The
terminal device 2 recognizes the DC! (PDCCH) which is successfully decoded
(detected) as the DCI (PDCCH) for the terminal device 2.
[0 Ill]
A cyclic redundancy check (CRC) is added to the DC!. The CRC is used
30 for the DC! error detection and the DC! blind detection. A CRC parity bit (CRC) is
scrambled using the RNTI. The terminal device 2 detects whether or not it is a DC!
SP366587WOOO
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for the terminal device 2 on the basis of the RNTI. Specifically, the terminal device
2 performs de-scrambling on the bit corresponding to the CRC using a predetermined
RNTI, extracts the .CRC, and detects whether or not the corresponding DC! is correct.
[0 112]
5 The RNTI is specified or set in accordance with a purpose or a use of the
DC!. The RNTI includes a ceii-RNTI (C-RNTI), a semi persistent scheduling CRNTI
(SPS C-RNTI), a system information-RNTl (Sl-RNTI), a paging-RNTl (PRNTI),
a random access-RNTI (RA-RNTl), a transmit power controi-PUCCH-RNTI
(TPC-PUCCH-RNTl), a transmit power controi-PUSCH-RNTI (TPC-PUSCH-
10 RNTl), a temporary C-RNTI, a multimedia broadcast multicast services (MBMS)RNTI
(M-RNTI)), and an e!MTA-RNTI.
[0 113]
The C-RNTl and the SPS C-RNTl are RNT!s which are specific to the
terminal device 2 in the base station device I (cell), and serve as identifiers
15 identifYing the tcnninal device 2. The C-RNTI is used for scheduling the POSCH
or the PUSCH in a cetiain sub frame. The SPS C-RNTI is used to activate or
release periodic scheduling of resources for the POSCH or the PUSCH. A control
channel.having a CRC scrambled using the Sl-RNTI is used for scheduling a system
information block (SIB). A control channel with a CRC scrambled using the P-
20 RNTl is used for controlling paging. A control channel with a CRC scrambled
using the RA-RNTl is used for scheduling a response to the RACH. A control
channel having a CRC scrambled using the TPC-PUCCH-RNTI is used for power
control of the PUCCH. A control channel having a CRC scrambled using the TPCPUSCH-
RNTI is used for power control of the PUSCH. A control channel with a
25 CRC scrambled using the temporary C-RNTI is used by a mobile station device in
which no C-RNTl is set or recognized. A control channel with CRC scrambled
using the M-RNTI is used for scheduling the MBMS. A control channel with a
CRC scrambled using the e!MTA-RNTl is used for notifying of information related
to a TDD ULIDL setting of a TDD serving cell in dynamic TDD (elMTA). Further,
30 the DC! format may be scrambled using a new RNTl instead of the above RNTI.
[0114]
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The scheduling information (downlink scheduling information, uplink
scheduling information, and sidelink scheduling information) includes information
for scheduling in .units of resource blocks or in units of resource block. groups as
scheduling in the frequency domain. The resource block group . is a set of
5 consecutive resource blocks and indicates resources allocated to the terminal device
to be scheduled. The size of the resource block group is decided in accordance with
a system bandwidth.
10
[0 115]

The DC! is transmitted using the PDCCH or the EPDCCH. The terminal
device 2 monitors a set of PDCCH candidates and/or a set of EPDCCH candidates of
one or more activated serving cells set by RRC signaling. Here, the monitoring
means that the PDCCH and/or the EPDCCH in the set corresponding to all the DC!
formats to be monitored is attempted to be decoded.
15 (0116]
A set of PDCCH candidates or a set of EPDCCH candidates is also referred
to as a search space. In the search space, a shared search space (CSS) and a
terminal specific search space (USS) are defined. The CSS may be defined only for
the search space for the PDCCH.
20 [0117]
A common search space (CSS) is a search space set on the basis of a
parameter specific to the base station device I and/or a parameter which is specified
in advance. For example, the CSS is a search space used in common to a plurality
of terminal devices. Therefore, the base station device I maps a control channel
25 common to a plurality of terminal devices to the CSS, and thus resources for
transmitting the control channel are reduced.
[0 118]
A UE-specitic search space (USS) is a search space set using at least a
parameter specific to the terminal device 2. Therefore, the USS is a search space
30 specific to the terminal device 2, and it is possible to individually transmit the control
channel specific to the terminal device 2. For this reason, the base station device I
SP3GG587WOOO
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can efficiently map the control channels specific to a plurality of terminal devices.
[0 119]
The USS may be set to be used in common to a plurality oftenninal.devices.
Since a common USS is set in a plurality of terminal devices, a parameter specific to
5 the terminal device 2 is set to be the same value among a plurality of terminal
devices. For example, a unit set to the same parameter among a plurality of
terminal devices is a cell, a transmission point, a group of predetermined terminal
devices, or the like.
[0 120]
10 The search space of each aggregation level is defined by a set of PDCCH
15
candidates. Each PDCCH is transmitted using one or more CCE sets. The
number of CCEs used in one PDCCH is also referred to as an aggregation level.
For example, the number ofCCEs used in one PDCCH is I, 2, 4, or 8.
[OJ 21]
The search space of each aggregation level is defined by a set of EPDCCH
candidates. Each EPDCCH is transmitted using one or more enhanced control
channel element (ECCE) sets. The number of ECCEs used in one EPDCCH is also
referred to as an aggregation level. For example, the number of ECCEs used in one
EPDCCH is I, 2, 4, 8, 16, or 32.
20 [0122]
The number of PDCCH candidates or the number of EPDCCH candidates is
decided on the basis of at least the search space and the aggregation level. For
example, in the CSS, the number of PDCCH candidates in the aggregation levels 4
and 8 are 4 and 2, respectively. For example, in the USS, the number of PDCCH
25 candidates in the aggregation I, 2, 4, and 8 arc 6, 6, 2, and 2, respectively.
[0123]
Each ECCE includes a plurality of EREGs. The EREG is used to define
mapping to the resource element of the EPDCCH. 16 EREGs which are assigned
numbers of 0 to 15 are defined in each RB pair. In other words, an EREG 0 to an
30 EREG 15 are defined in each RB pair. For each RB pair, the EREG 0 to the EREG
15 arc preferentially defined at regular intervals in the frequency direction for
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resource clements other than resource elements to which a predetermined signal
and/or channel is mapped. For example, the EREG is not defined for a resource
. element to .. which· .a demodulation reference signal associated. with :an EPDCCH
transmitted through antenna pmis I 07 to II 0 is mapped.
5 [0124]
The number of ECCEs used in one EPDCCH depends on an EPDCCH
format and is decided on the basis of other parameters. The number of ECCEs used
in one EPDCCH is also referred to as an aggregation level. For example, the
number of ECCEs used in one EPDCCH is decided on the basis of the number of
10 resource elements which can be used for transmission of the EPDCCH in one RB
pair, a transmission method of the EPDCCH, and the like. For example, the number
of ECCEs used in one EPDCCH is I, 2, 4, 8, 16, or 32. Fmihe•; the number of
EREGs used in one ECCE is decided on the basis of a type of sub frame and a type
of cyclic prefix and is 4 or 8. Distributed transmission and localized transmission
15 are supported·as the transmission method of the EPDCCH.
[0 125]
The distributed transmission or the localized transmission can be used for
the EPDCCH. The distributed transmission and the localized transmission differ in
mapping of the ECCE to the EREG and the RB pair. For example, in the
20 distributed transmission, one ECCE is configured using EREGs of a plurality of RB
pairs. In the localized transmission, one ECCE is configured using an EREG of one
RB pair.
[0 126]
The base station device I performs a setting related to the EPDCCH in the
25 terminal device 2. The terminal device 2 monitors a plurality of EPDCCHs on the
basis of the setting fi·om the base station device 1. A set of RB pairs that the
terminal device 2 monitors the EPDCCH can be set. The set of RB pairs is also
referred to as an EPDCCH set or an EPDCCH-PRB set. One or more EPDCCH
sets can be set in one terminal device 2. Each EPDCCH set includes one or more
30 RB pairs. Fmiher, the setting related to the EPDCCH can be individually
performed for each EPDCCH set.
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[0 127]
The base station device I can set a predetermined number of EPDCCJ-1 sets
.... in .ihe·.tenninal device 2. For example, up to two EPDCCH sets can be set as an
EPDCCJ-1 set 0 and/or an EPDCCH set I. Each of the EPDCCH sets can be
5 constituted by a predetermined number of RB pairs. Each EPDCCH set constitutes
one set of ECCEs. The number of ECCEs configured in one EPDCCH set is
decided on the basis of the number of RB pairs set as the EPDCCH set and the
number of EREGs used in one ECCE. In a case in which the number of ECCEs
configured in one EPDCCH set is N, each EPDCCH set constitutes ECCEs 0 to N-1.
10 For example, in a case in which the number of EREGs used in one ECCE is 4, the
EPDCCH set constituted by 4 RB pairs constitutes 16 ECCEs.
[0 128]

The terminal device 2 reports the CSI to the base station device I. The
15 time and frequency resources used to report the CSI are controlled by the base station
device I. In the terminal device 2, a setting related to the CSI is performed through
the RRC signaling fi·om the base station device I. In the terminal device 2, one or
more CSI processes are set in a predetermined transmission mode. The CSI
repmted by the tenninal device 2 corresponds to the CSI process. For example, the
20 CSI process is a unit of control or setting related to the CSI. For each of the CSI
processes, a setting related to the CSI-RS resources, the CSI-IM resources, the
periodic CSI repmt (for example, a period and an offset of a repmt), and/or the nonperiodic
CSI repmt can be independently set.
[0 129]
25 The CSI includes a channel quality indicator (CQI), a precoding matrix
indicator (PM!), a precoding type indicator (PTI), a rank indicator (RI), and/or a CSIRS
resource indicator (CRI). The RI indicates the number of transmission layers
(the number of ranks). The PM! is information indicating a precoding matrix which
is specified in advance. The PM! indicates one precoding matrix by one piece of
30 information or two pieces of information. In a case in which two pieces of
information arc used, the PM! is also referred to as a first PMI and a second PM!.
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The CQI is information indicating a combination of a modulation scheme and a
coding rate which are specified in advance. The CRI is information (single
,_ . . instance) indicating one CSI-RS resource selected·. from two or more CSI-RS
resources in a case in which the two or more CSI-RS resources are set in one CSJ
5 process. The terminal device 2 reports the CSI to recommend to the base station
device I. The terminal device 2 reports the CQI satisfying a predetermined
reception quality for each transpmt block (codeword).
[0 130]
In the CRI repmi, one CSI-RS resource is selected from the CSI-RS
10 resources to be set. In a case in which the CRI is reported, the PM!, the CQI, and
the RI to be reported are calculated (selected) on the basis of the repmted CRL For
example, in a case in which the CSI-RS resources to be set arc precoded, the terminal
device 2 reports the CRI, so that preceding (beam) suitable for the terminal device 2
is reported.
15 [0131]
A sub fi·ame (repmiing instances) in which periodic CSI repmting can be
performed are decided by a report period and a sub fi·ame offset set by a parameter of
a higher layer (a CQIPMI index, an Rl index, and a CRI index). Further, the
parameter of the higher layer can be independently set in a sub frame set to measure
20 the CSL In a case iti which only one piece of information is set in a plurality of sub
frame sets, that information can be set in common to the sub fi·ame sets. In each
serving cell, one or more periodic CSI repmts are set by the signaling of the higher
layer.
25
[0 132]
A CSI report type supports a PUCCH CSI report mode. The CSI report
type is also referred to as a PUCCH repmi type. A type I report supports feedback
of the CQI for a terminal selection sub band. A type Ia rcpmt suppmts feedbank of
a sub band CQI and a second PMI. Type 2, type 2b, type 2c reports support
feedback of a wideband CQI and a PML A type 2a repmt supports feedback of a
30 wideband PML A type 3 report supports feedback of the RI. A type 4 repmt
supports feedback of the wideband CQI. A type 5 report suppmts feedback of the
•'·. I·.)-
5
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RI and the widcband PMI. A type 6 report supports feedback of the RI and the PTI.
A type 7 report supports feedback of the CRI and the Rl. A type 8 report supports
feedback of the CRI, the RI, and the wideband PM I.. A type 9 repmt suppmts
feedback of the CRI, the RI, and the PTJ. A type I 0 report supports feedback of the
CRJ.
[0 133]
In the terminal device 2, information related to the CSI measurement and
the CSI rep01t is set from the base station device I. The CSI measurement is
performed on the basis of the reference signal and/or the reference resources (for
10 example, the CRS, the CSI-RS, the CSI-IM resources, and/or the DRS). The
reference signal used for the CSI measurement is decided on the basis of the setting
of the transmission mode or the like. The CSI measurement is performed on the
basis of channel measurement and interference measurement. For example, power
of a desired cell is measured through the channel measurement. Power and noise
15 power of a cell other ·than a desired cell are measured through the interference
measurement.
[0 134]
For example, in the CSI measurement, the terminal device 2 performs the .
channel measurement and the interference measurement on the basis of the CRS.
20 For example, in the CSI measurement, the terminal device 2 performs the channel
measurement on the basis of the CSI-RS and performs the interference measurement
on the basis of the CRS. For example, in the CSI measurement, the terminal device
2 performs the channel measurement on the basis of the CSI-RS and performs the
interference measurement on the basis of the CSI-lM resources.
25 [0135]
The CSI process is set as information specific to the terminal device 2
through signaling of the higher layer. In the terminal device 2, one or more CSI
processes are set, and the CSlmeasurement and the CSI report are performed on the
basis of the setting of the CSl process. For example, in a case in which a plurality
30 of CSI processes are set, the terminal device 2 independently repmts a plurality of
CS!s based on the CST processes. Each CSI process includes a setting for the cell
' '· .'.
5
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state information, an identifier of the CSl process, setting information related to the
CSl-RS, setting information related to the CSl-lM, a sub frame pattern set for the
CSl rcp01t, setting information related to the periodic CSI rep01t, setting information
related to the non-periodic CSI report. Further, the setting for the cell state
information may be common to a plurality of CSl processes.
[0 136]
The terminal device 2 uses the CSI reference resources to perform the CSl
measurement. For example, the terminal device 2 measures the CSI in a case in
which the POSCH is transmitted using a group of downlink physical resource blocks
10 indicated by the CSI reference resources. In a case in which the CSI sub frame set
is set through the signaling of the higher layer, each CSI reference resource belongs
to one of the CSI sub frame sets and does not belong to both of the CSl sub fi·ame
sets.
[0137]
15 In the frequency direction, the CSI reference resource is defined by the
group of downlink physical resource blocks corresponding to the bands associated
with the value of the measured CQI.
[0138]
In the layer direction (spatial direction), the CSI reference resources are
20 defined by the Rl and the PM! whose conditions are set by the measured CQI. In
other words, in the layer direction (spatial direction), the CSI reference resources are
defined by the RI and the PM! which are assumed or generated when the CQI rs
measured.
25
[0 139)
In the time direction, the CSI reference resources are defined by one or
more predetermined downlink sub frames. Specifically, the CSI reference resources
are defined by a valid sub frame which is a predetermined number before a sub fi·amc
for reporting the CSI. The predetermined number of sub fi·amcs for defining the
CSl reference resources is decided on the basis of the transmission mode, the frame
30 configuration type, the number of CSl processes to be set, and/or the CSI report
mode. For example, in a case in which one CSl process and the periodic CSI report
~
~
5
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mode arc set in the terminal device 2, the predetermined number of sub frames for
defining the CSI reference resource is a minimum value of 4 or more among valid
downlink sub frames.
[0 140]
A valid sub frame is a sub frame satisfying a predetermined condition. A
downlink sub frame in a serving cell is considered to be valid in a case in which
some or all of the following conditions are satisfied:
(I) A valid downlink sub fi·amc is a sub frame in an ON state in the terminal
device 2 in which the RRC parameters related to the ON slate and the OFF stale are
10 set;
(2) A valid downlink sub frame is set as the downlink sub frame in the
terminal device 2;
(3) A valid downlink sub frame is not a multimedia broadcast multicast
service single frequency network (MBSFN) sub fi11me in a predetermined
15 transm issionmode;
( 4) A valid downlink sub frame is not included in a range of a measurement
interval (measurement gap) set in the terminal device 2;
(5) A valid downlink sub fi·ame is an element or patt of a CSI sub fi"ame set
linked to a periodic CSI repot1 when the CSI sub frame set is set in the tenninal
20 device 2 in the periodic CSI repmt; and
(6) A valid downlink sub fi"ame is an clement or part of a CSJ sub fi·ame set
linked to a downlink sub frame associated with a corresponding CSI request in an
uplink DCI format in a non-periodic CSJ report tor the CSI process. Under these
conditions, a predetermined transmission mode, a plurality of CSI processes, and a
25 CSI sub fi·ame set for the CSJ process are set in the terminal device 2.
[0 141]

A plurality of cells are set for the terminal device 2, and the terminal device
2 can perform multicarrier transmission. Communication in which the terminal
30 device 2 uses a plurality of cells is referred to as carrier aggregation (CA) or dual
connectivity (DC). Contents described in the present embodiment can be applied to
SP366587WOOO
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each or some of a plurality of cells set in the terminal device 2. The cell set in the
terminal device 2 is also referred to as a serving cell.
[0 142]
In the CA, a plurality of serving cells to be set includes one primary cell
5 (PCell) and one or more secondary cells (SCell). One primary cell and one or more
secondary cells can be set in the terminal device 2 that supports the CA.
[0143]
The primary cell is a servmg cell in which the initial connection
establishment procedure is performed, a serving cell that the initial connection re-
10 establishment procedure is statied, or a cell indicated as the primary cell 111 a
handover procedure. The primary cell operates with a primary frequency. The
secondary cell can be set after a connection is constructed or reconstructed. The
secondary cell operates with a secondary frequency. Furthet; the connection is also
referred to as an RRC connection.
15 [0144]
The DC ts an operation in which a predetermined terminal device 2
consumes radio resources provided from at least two different network points. The
network point is a master base station device (a master eNB (MeNB)) and a
secondary base station device (a secondary eNB (SeNB)). In the dual connectivity,
20 the terminal device 2 establishes an RRC connection through at least two network
points. In the dual connectivity, the two network points may be connected through
a non-ideal backhaul.
[0145]
In the DC, the base station device I which is connected to at least an S l-
25 MME and plays a role of a mobility anchor of a core network is referred to as a
master base station device. Further, the base station device l which is not the
master base station device providing additional radio resources to the terminal device
2 is referred to as a secondary base station device. A group of serving cells
associated with the master base station device is also referred to as a master cell
30 group (MCG). A group of serving cells associated with the secondary base station
device is also referred to as a secondary cell group (SCG).
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[0146]
In the DC, the primary cell belongs to the MCG. Furthe1; in the SCG, the
secondary cell corresponding to the primary cell is referred to as a primary secondary
cell (PSCell) .. A function (capability and performance) equivalent to the PCell (the
5 base station device constituting the PCell) may be supported by the PSCell (the base
station device constituting the PSCell). Furthe1; the PSCell may only suppmt some
functions of the PCell. For example, the PSCell may support a function of
performing the PDCCH transmission using the search space different from the CSS
or the USS. Fu1the1; the PSCellmay constantly be in an activation state. Further,
10 the PSCell is a cell that can receive the PUCCH.
[0147]
In the DC, a radio bearer (a date radio bearer (DRB)) and/or a signaling
radio bearer (SRB) may be individually allocated through the MeNB and the SeNB.
A duplex mode may be set individually in each of the MCG (PCell) and the SCG
15 (PSCell). The MCG (PCell) and the SCG (PSCell) may not be synchronized with
each other. A parameter (a timing advance group (TAG)) for adjusting a plurality of
timings may be independently set in the MCG (PCell) and the SCG (PSCell). In the
dual connectivity, the terminal device 2 transmits the UCI corresponding to the cell
in the MCG only through MeNB (PCell) and transmits the UCI corresponding to the
20 cell in the SCG only through SeNB (pSCell). In the transmission of each UCI, the
transmission method using the PUCCI·! and/or the PUSCH is applied in each cell
group.
[0 148]
The PUCCH and the PBCH (MIB) are transmitted only through the PCell or
25 the PSCell. Fwther, the PRACH is transmitted only through the PCell or the
PSCell as long as a plurality ofTAGs are not set between cells in the CG.
[0 149]
In the PCell or the PSCell, semi-persistent scheduling (SPS) or
discontinuous transmission (DRX) may be performed. In the secondary cell, the
30 same DRX as the PCell or the PSCell in the same cell group may be performed.
[0 150]
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In the secondary cell, information/parameter related to a setting of MAC is
basically shared with the PCell or the PSCell in the same cell group. Some
parameters .may .be set for each secondary cell. Some timers or counters may be
applied only to the PCell or the PSCell.
5 [0151]
In theCA, a cell to which the TDD scheme is applied and a cell to which the
FDD scheme is applied may be aggregated. In a case in which the cell to which the
TDD is applied and the cell to which the FDD is applied are aggregated, the present
disclosure can be applied to either the cell to which the TDD is applied or the cell to
10 which the FDD is applied.
[0152]
The terminal device 2 transmits information indicating a combination of
bands in which the CA is suppmted by the terminal device 2 to the base station
device 1. The tenninal device 2 transmits information indicating whether or not
15 simultaneous transmission and reception arc supported in a plurality of serving cells
in a plurality of different bands for each of band combinations to the base station
device 1.
[0153]

20 The base station device 1 can use a plurality of methods as a method of
allocating resources of the POSCH and/or the PUSCH to the terminal device 2. The
resource allocation method includes dynamic scheduling, semi persistent scheduling,
multi sub fl"ame scheduling, and cross sub frame scheduling.
[0154]
25 In the dynamic scheduling, one DC! performs resource allocation in one sub
frame. Specifically, the PDCCH or the EPDCCH in a certain sub frame performs
scheduling for the POSCH in the sub fi·ame. The PDCCH or the EPDCCH in a
cc1tain sub frame performs scheduling for the PUSCH in a predetermined sub frame
afler the ce1tain sub frame.
30 [0155]
In the multi sub frame scheduling, one DC! allocates resources in one or
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more sub frames. Specifically, the POCCH or the EPOCCH in a certain sub frame
performs scheduling for the POSCH in one or more sub frames which are a
predetermined number after the certain sub fi·ame. The POCCH or the EPOCCH in
a ce1iain sub frame performs scheduling for the PUSCH in. one or more sub fi·ames
5 which arc a predetermined number after the sub fi·ame. The predetermined number
can be set to an integer of zero or more. The predetermined number may be
specified in advance and may be decided on the basis of the signaling of the physical
layer and/or the RRC signaling. In the multi sub fi·ame scheduling, consecutive sub
fi·ames may be scheduled, or sub frames with a predetermined period may be
10 scheduled. The number of sub frames to be scheduled may be specified in advance
or may be decided on the basis of the signaling of the physical layer and/or the RRC
signaling.
[0156]
In the cross sub fiame scheduling, one OCI allocates resources in one sub
15 frame. Specifically, the POCCH or the EPOCCH in a certain sub frame performs
scheduling for the POSCH in one sub frame which is a predetermined number after
the certain sub frame. The POCCH or the EPOCCH in a certain sub frame
performs scheduling for the PUSCH in one sub fi·ame which is a predetermined
number after the sub frame. The predetermined number can be set to an integer of
20 zero or more. The predetermined number may be specified in advance and may be
decided on the basis of the signaling of the physical layer and/or the RRC signaling.
In the cross sub fi·ame scheduling, consecutive sub frames may be scheduled, or sub
frames with a predetermined period may be scheduled.
25
[0 157]
In the semi-persistent scheduling (SPS), one OCT allocates resources in one
or more sub frames. In a case in which information related to the SPS is set through
the RRC signaling, and the POCCH or the EPDCCH for activating the SPS is
detected, the terminal device 2 activates a process related to the SPS and receives a
predetermined POSCH and/or PUSCH on the basis of a setting related to the SPS.
30 In a case in which the POCCH or the EPDCCH for releasing the SPS is detected
when the SPS is activated, the terminal device 2 releases (inactivates) the SPS and
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stops reception of a predetermined POSCH and/or PUSCH. The release of the SPS
may be performed on the basis of a case in which a predetermined condition is
·.,_satisfied., For example, in a case in which a predetermined number of empty
transmission data is received, the SPS is released. The data empty transmission for
5 releasing the SPS corresponds to a MAC protocol data unit (PDU) including a zero
MAC service data unit (SOU).
[0 158]
Information related to the SPS by the RRC signaling includes an SPS CRNTI
which is an SPN RNTI, information related to a period (interval) in which the
10 POSCH is scheduled, information related to a period (interval) in which the PUSCH
is scheduled, information related to a setting for releasing the SPS, and/or a number
of the HARQ process in the SPS. The SPS is suppo1ted only in the primary cell
and/or the primary secondary cell.
[0 159]
15
FIG. 5 is a diagram illustrating an example of downlink resource element
mapping in the present embodiment. In this example, a set of resource elements in
one resource block pair in a case in which one resource block and the number of
OFDM symbols in one slot are 7 will be described. Fmther, seven OFDM symbols
20 in a first half in the time direction in the resource block pair are also referred to as a
slot 0 (a first slot). Seven OFDM symbols in a second half in the time direction in
the resource block pair are also referred to as a slot 1 (a second slot). Further, the
OFDM symbols in each slot (resource block) are indicated by OFDM symbol
number 0 to 6. Further, the sub carriers in the fi·equency direction in the resource
25 block pair are indicated by sub carrier numbers 0 to II. Furthe1; in a case in which
a system bandwidth is constituted by a plurality of resource blocks, a different sub
carrier number is allocated over the system bandwidth. For example, in a case in
which the system bandwidth is constituted by six resource blocks, the sub carriers to
which the sub carrier numbers 0 to 71 are allocated are used. Further, in the
30 description of the present embodiment, a resource element (k, I) is a resource element
indicated by a sub carrier number k and an OFDM symbol number I.
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[0 160]
Resource elements indicated by R 0 to R 3 indicate cell-specific reference
.... :.,signals of.the antenna pmts 0 to 3, respectively .. Hereinafter, the cell-specific
reference signals of the antenna ports 0 to 3 are also referred to as cell-specific RSs
5 (CRSs). In this example, the case of the antenna ports in which the number of
CRSs is 4 is described, but the number thereof can be changed. For example, the
CRS can use one antenna pmt or two antenna potts. Further, the CRS can shift in
the frequency direction on the basis of the cell 10. For example, the CRS can shift
in the frequency direction on the basis of a remainder obtained by dividing the cell
10 10 by 6.
[0 161]
Resource element indicated by Cl to C4 indicates reference signals (CSIRS)
for measuring transmission path states of the antenna ports 15 to 22. The
resource elements denoted by Cl to C4 indicate CSI-RSs of a code division
15 multiplexing (COM) group I to a COM group 4, respectively. The CSI-RS is
constituted by an orthogonal sequence (otthogonal code) using a Walsh code and a
scramble code using a pseudo random sequence. Fmther, the CSI-RS is code
division multiplexed using an mthogonal code such as a Walsh code in the COM
group. Fmther, the CSI-RS is frequency-division multiplexed (FOM) mutually
20 between the COM groups.
[0 162]
The CSI-RSs of the antenna p01ts 15 and 16 are mapped to Cl. The CSIRSs
of the antenna ports 17 and 18 is mapped to C2. The CSI-RSs of the antenna
port 19 and 20 are mapped to C3. The CSI-RSs of the antenna p01t 21 and 22 are
25 mapped to C4.
[0 163]
A plurality of antenna ports of the CSI-RSs are specified. The CSI-RS can
be set as a reference signal corresponding to eight antenna ports of the antenna ports
15 to 22. Further, the CSI-RS can be set as a reference signal corresponding to four
30 antenna ports of the antenna potts 15 to 18. Further, the CSI-RS can be set as a
reference signal corresponding to two antenna ports of the antenna ports 15 to 16.
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Fmther, the CSI-RS can be set as a reference signal corresponding to one antenna
port of the antenna pott 15. The CSI-RS can be mapped to some sub 11-ames, and,
. ,·, ......... for example, the CSI-RS can be mapped for every.two.or more sub frames. A
plurality of mapping patterns arc specified for the resource element of the CSI-RS.
5 Further, the base station device I can set a plurality of CSl-RSs in the terminal
device 2.
[0 164]
The CSI-RS can set transmission power to zero. The CSI-RS with zero
transmission power is also referred to as a zero power CSI-RS. The zero power
10 CSI-RS is set independently of the CSI-RS of the antenna ports 15 to 22. Further,
the CSI-RS of the antenna potts 15 to 22 is also referred to as a non-zero power CSIRS.
[0 165]
The base station device I sets CSI-RS as control information specific to the
15 terminal device 2 through the RRC signaling. In the tenninal device 2, the CSI-RS
is set through the RRC signaling by the base station device I. Fwther, in the
terminal device 2, the CSI-IM resources which are resources for measuring
interference power can be set. The terminal device 2 generates feedback
information using the CRS, the CSI-RS, and/or the CSI-IM resources on the basis of
20 a setting fi·om the base station device I.
[0 166]
Resource elements indicated by 0 I to 02 indicate the OL-OMRSs of the
CDM group I and the COM group 2, respectively. The DL-OMRS is constituted
using an orthogonal sequence (otthogonal code) using a Walsh code and a scramble
25 sequence according to a pseudo random sequence. Further, the DL-OMRS is
independent tor each antenna port and can be multiplexed within each resource block
pair. The DL-OMRSs are in an orthogonal relation with each other between the
antenna ports in accordance with the COM and/or the FOM. Each of OL-DMRSs
undergoes the COM in the COM group in accordance with the orthogonal codes.
30 The DL-OMRSs undergo the FOM with each other between the COM groups. The
OL-OMRSs in the same CDM group are mapped to the same resource element. For
" .·
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the OL-OMRSs in the same CDM group, different orthogonal sequences are used
between the antenna potts, and the orthogonal sequences are in the orthogonal
relation with each other. The OL-DMRS Jar the POSCH can use some or all of the
eight antenna potts (the antenna potts 7 to 14). In other words, the POSCH
5 associated with the OL-OMRS can perform MIMO transmission of up to 8 ranks.
The OL-DMRS for the EPOCCH can use some or all of the four antenna ports (the
antenna ports I 07 to II 0). Fmther, the OL-OMRS can change a spreading code
length of the COM or the number of resource elements to be mapped in accordance
with the number of ranks of an associated channel.
10 [0167]
The OL-OMRS for the PDSCI-1 to be transmitted through the antenna potts
7, 8, II, and 13 are mapped to the resource element indicated by 0 I. The OLD
MRS for the PDSCH to be transmitted through the antenna potts 9, I 0, 12, and 14
are mapped to the resource clement indicated by 02. Furthet; the DL-OMRS for
15 the EPOCCH to be transmitted through the antenna ports I 07 and I 08 are mapped to
the resource clement indicated by 0 I. The DL-OMRS for the EPOCCH to be
transmitted through the antenna potts I 09 and II 0 arc mapped to the resource
element denoted by 02.
[0168]
20
In the present embodiment, the 1-IARQ has various features. The HARQ
transmits and retransmits the transpott block. In the HARQ, a predetermined
number of processes (HARQ processes) are used (set), and each process
independently operates in accordance with a stop-and-wait scheme.
25 [0169]
In the downlink, the 1-IARQ is asynchronous and operates adaptively. In
other words, in the downlink, retransmission is constantly scheduled through the
POCCH. The uplink HARQ-ACK (response information) corresponding to the
downlink transmission is transmitted through the PUCCH or the PUSCH. In the
30 downlink, the POCCI-1 notifies of a HARQ process number indicating the HARQ
process and information indicating whether or not transmission is initial transmission
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or retransmission.
[0 170]
In the uplink, the HARQ opei·ates in a synchronous or asynchronous manner ..
The downlink HARQ-ACK (response information) corresponding to the uplink
5 transmission is transmitted through the PHICH. In the uplink HARQ, an operation
of the terminal device is decided on the basis of the HARQ feedback received by the
terminal device and/or the PDCCH received by the terminal device. For example,
in a case in which the PDCCH is not received, and the HARQ teedback is ACK, the
terminal device does not perform transmission (retransmission) but holds data in a
10 HARQ buffer. In this case, the PDCCH may be transmitted in order to resume the
retransmission. Fmther, for example, in a case in which the PDCCI-1 is not received,
and the HARQ feedback is NACK, the terminal device performs retransmission nonadaptively
through a predetermined uplink sub frame. Fmther, for example, in a
case in which the PDCCI-1 is received, the terminal device performs transmission or
15 retransmission on the basis·of contents notified through the PDCCI-1 regardless of
content of the HARQ feedback.
[0 171]
Fmther, in the uplink, in a case in which a predetermined condition (setting)
is satisfied, the HARQ may be operated only in an asynchronous manner. In other
20 words, the downlink HARQ-ACK is not transmiHed, and the uplink retransmission
may constantly be scheduled through the PDCCI-1.
[0 172]
In the HARQ-ACK report, the HARQ-ACK indicates ACK, NACK, or
DTX. In a case in which the HARQ-ACK is ACK, it indicates that the transport
25 block (codeword and channel) corresponding to the HARQ-ACK is correctly
received (decoded). In a case in which the HARQ-ACK is NACK, it indicates that
the transport block (codeword and channel) corresponding to the HARQ-ACK is not
correctly received (decoded). In a case in which the HARQ-ACK is DTX, it
indicates that the transport block (codeword and channel) corresponding to the
30 HARQ-ACK is not present (not transmitted).
[0 173]
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A predetermined number of HARQ processes arc set (specified) in each of
downlink and uplink. For example, in FOO, up to eight HARQ processes are used
for each serving cell. Eurthero for.example, in TOO, a maximum number of HARQ
processes is decided by an uplink/downlink setting. A maximum number ofHARQ
5 processes may be decided on the basis of a round trip time (RTf). For example, in
a case in which the RTI is 8 TI!s, the maximum number of the HARQ processes can
be 8.
[0174]
In the present embodiment, the HARQ information is constituted by at least
10 a new data indicator (NDI) and a transport block size (TBS). The NDI is
information indicating whether or not the transp011 block corresponding to the
HARQ information is initial transmission or retransmission. The TBS is the size of
the transp011 block. The transport block is a block of data in a transpott channel
(transport layer) and can be a unit for performing the HARQ. In the OL-SCH
15 transmission, the+IARQinfonnation further includes a HARQ process ID (a HARQ
process number). In the UL-SCH transmission, the HARQ information fut1her
includes an information bit in which the transpm1 block is encoded and a redundancy
version (RV) which is information specifying a parity bit. In the case of spatial
multiplexing in the OL-SCH, the HARQ information thereof includes a set of NDI
20 and TBS for each transport block.
[0 175]

FIG. 6 is a diagram illustrating an example of the TTl in the present
embodiment. In the example of FIG. 6, the Til is a I sub fi·ame. In other words, a
25 unit of data transmission in the time domain such as the POCCH, the EPOCCH, the
POSCH, the PUSCH, or the HARQ-ACK is a I sub frame. Arrows between
downlink and uplink indicate a HARQ timing and/or a scheduling timing. The
HARQ timing and the scheduling timing are specified or set in units of sub frames
which are TT!s. For example, in a case in which a certain POSCH is transmitted
30 through a downlink sub frame n, the HARQ-ACK for the POSCH is transmitted
through an uplink sub frame n+4 after 4 sub frames. For example, in a case in
E
~I
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which the POCCll for notifying of the uplink grant is transmitted through a downlink
sub fi·ame n, the PUSCH corresponding to the uplink grant is transmitted through an
uplink sub frame 11.+4 .after 4 sub frames, and the HARQ-ACK for the PUSCH. is
notified through a downlink sub fi·amc n+8 after 4 sub frames. Further·, in FIG. 6,
5 an example in which the 1Tl is a I sub frame is described, but the TTl may be a
plurality of sub frames. In other words, the TTl may be an integer multiple of a sub
frame length.
[0 176]
FIG. 7 is a diagram illustrating an example of the TTl in the present
10 embodiment. In the example of FIG. 7, the TTl is a I symbol. In other words, a
unit of data transmission in the time domain such as the POCCH, the EPOCCH, the
POSCH, the PUSCH, or the HARQ-ACK is a I symbol. Arrows between downlink
and uplink indicate a HARQ timing and/or a scheduling timing. The HARQ timing
and the scheduling timing are specified or set in units of symbols which are TT!s.
15 For example, in a ·case in which a certain POSCH is transmitted through a downlink
symbol n, the HARQ-ACK for the POSCH is transmitted through an uplink symbol
n+4 after 4 symbols. For example, in a case in which the POCCH for notifYing of
the, uplink grant is transmitted through a downlink symbol n, the PUSCH
corresponding to the uplink grant is transmitted through an uplink symbol n+4 after 4
20 symbols, and the HARQ-ACK for the PUSCH is notified through a downlink symbol
n+8 after 4 symbols. Further, in FIG. 6, an example in which the TTl is a 1 symbol
is described, but the TTl may be a plurality of symbols. In other words, the TTl
may be an integer multiple of a symbol length.

CLAIMS
Claim I
A terminal device that communicates with a base station device, the
terminal device comprising:
a receiving unit configured to receive a first POSCH that is transmitted on a
basis of a sub fi·ame which is defined by a predetermined number of symbols, and a
second POSCH that is transmitted on a basis of an extended sub frame which has a
smaller number of symbols than a number of symbols corresponding to the sub
frame; and_
10 a transmitting unit configured to transmit a first HARQ-ACK that is a
feedback for reception of the first POSCH after a predetermined sub frame, and
transmit a second HARQ-ACK that is a feedback for reception of the second POSCH
after a predetermined extended sub fi·ame.
15 Claim 2
20
25
30
The terminal device according to claim I, wherein
the first HARQ-ACK is transmitted through a first PUCCH or a first
PUSCH in a sub fi·ame that is a predetermined number after a sub frame in which the
first POSCH is received, and
the second HARQ-ACK is transmitted through a second PUCCH or a
second PUSCH in an extended sub frame that is a predetermined number after an
extended sub frame in which the second POSCH is received.
Claim 3
The terminal device according to claim I, wherein
the second HARQ-ACK is not transmitted in an extended sub fi·ame
included in a sub frame in which the first IIARQ-ACK is transmitted.
Claim4
The terminal device according to claim 3, wherein
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the receiving unit assumes that the second HARQ-ACK which cau be
transmitted in the extended sub fi·ame included in the sub frame in which the first
HARQ-ACK is .transmitted is not received.
5 Claim 5
10
The terminal device according to claim 3, wherein
in a case in which the second HARQ-ACK transmitted in the extended sub
fi·amc included in the sub frame in which the first HARQ-ACK is transmitted occurs,
the transmitting unit drops the second HARQ-ACK.
Claim 6
The terminal device according to claim 3, wherein
in a case in which the second HARQ-ACK transmitted in the extended sub
frame included in the sub fi·ame in which the first HARQ-ACK is transmitted occurs,
15 the transmitting unit transmits the second HARQ-ACK through a first PUCCH or a
first PUSCH for transmitting the first HARQ-ACK.
20
25
30
Claim 7
The terminal device according to claim 1, wherein
the first HARQ-ACK is not transmitted in a sub frame including an
extended sub fi-ame in which the second HARQ-ACK is transmitted.
Claim 8
The terminal device according to claim 7, wherein
the receiving unit assumes that the first HARQ-ACK which can be
transmitted in the sub frame including the extended sub fi·ame in which the second
HARQ-ACK is transmitted is not received.
Claim 9
The terminal device according to claim 7, wherein
I r/ .
c''1
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111 a case in which the first HARQ-ACK transmitted in the sub liame
including the extended sub fi·amc in which the second HARQ-ACK is transmitted
occurs, the transmitting unit drops the first HARQ-ACK.
5 Claim I 0
The terminal device according to claim 7, wherein
in a case in which the first HARQ-ACK transmitted 111 the sub frame
including the extended sub frame in which the second HARQ-ACK is transmitted
occurs, the transmitting unit transmits the first HARQ-ACK through a second
10 PUCCI-I or a second PUSCH for transmitting the second 1-IARQ-ACK.
Claim II
The terminal device according to claim I, wherein
the receiving unit receives a first PDCCH for a notification of allocation
15 infonnation of the first PUSCH that is transmitted on the basis of the sub frame,
20
25
the transmitting unit transmits the first PUSCH on a basis of the allocation
information, and
the second HARQ-ACK is not transmitted in an extended sub fi·ame
included in a sub frame in which the first PUSCH is transmitted.
Claim 12
The terminal device according to claim I, wherein
the receiving unit receives a first PDCCH for a notification of allocation
information of the first PUSCH that is transmitted on the basis of the sub frame,
the transmitting unit transmits the first PUSCH on a basis of the allocation
information, and
the first PUSCH is not transmitted in a sub frame including an extended sub
frame in which the second 1-IARQ-ACK is transmitted.
30 Claim 13
The terminal device according to claim I, wherein
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the receiving unit receives a second POCCI-1 for a notification of allocation
information of the second PUSCH that is transmitted on the basis of the extended sub
fi·ame,
the transmitting unit transmits the second PUSCH on a basis of the
5 allocation information, and
10
the second PUSCH is not transmitted in an extended sub frame included in a
sub fi·ame in which the first HARQ-ACK is transmitted.
Claim 14
The terminal device according to claim I, wherein
the receiving unit receives a second POCCH for a notification of allocation
information of a second PUSCH that is transmitted on a basis of the extended sub
fi·ame,
the transmitting unit transmits the second PUSCH on a basis of the
15 allocation infonnation, and
20
the first HARQ-ACK is not transmitted in a sub fi·ame including an
extended sub frame in which the second PUSCH is transmitted.
Claim 15
A base station device that communicates with a terminal device, the base
station device comprising:
a transmitting unit configured to transmit a first POSCH that is transmitted
on a basis of a sub fi·ame which is defined by a predetermined number of symbols,
and a second POSCH that is transmitted on a basis of an extended sub frame which
25 has a smaller number of symbols than a number of symbols corresponding to the sub
frame; and
a receiving unit configured to receive a first HARQ-ACK that is a feedback
for reception of the first POSCH after a predetermined sub frame, and receive a
second HARQ-ACK that is a feedback for reception of the second PDSCH after a
30 predetermined extended sub frame.
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Claim 16
A communication method that is used by a terminal device which
.... communicates with a base station device, the communication method comprising:
a step of receiving a first POSCH that is transmitted on a basis of a sub
5 frame which is defined by a predetermined number of symbols, and a second
POSCH that is transmitted on a basis of an extended sub frame which has a smaller
number of symbols than a number of symbols corresponding to the sub frame; and
a step of transmitting a first HARQ-ACK that is a feedback for reception of
the first POSCH after a predetermined sub frame, and transmitting a second HARQ-
10 ACK that is a feedback for reception of the second POSCH after a predetennined
extended sub frame.
Claim 17
A communication method that is used by a base station device which
15 communicates with a terminal device, the communication method comprising:
20
a step of transmitting a first POSCH that is transmitted on a basis of a sub
frame which is defined by a predetermined number of symbols, and a second
POSCH that is transmitted on a basis of an extended sub fi·ame which has a smaller
number of symbols than a number of symbols corresponding to the sub fi·ame; and
a step of receiving a first HARQ-ACK that is a feedback for reception of the
first POSCH after a predetermined sub fi·ame, and receiving a second HARQ-ACK
that is a feedback for reception of the second POSCH after a predetermined extended
sub frame.