JP6306859B2 - Terminal apparatus, base station apparatus, and communication method - Google Patents

Description

  The present invention relates to a terminal device, a base station device, and a communication method.

  Wireless LAN (WLAN: Wireless) by WCDMA (Wideband Code Division Multiple Access) by 3GPP (Third Generation Partnership Project), Long Term Evolution (LTE), LTE-A (LTE-Advanced) and IEEE (The Institute of Electrical and Electronics engineers) Base station apparatus (cell, first communication apparatus (communication apparatus different from terminal apparatus), eNodeB) and terminal apparatus (mobile) included in communication systems such as Local Area Network (WiMAX) and WiMAX (Worldwide Interoperability for Microwave Access) The terminal, mobile station apparatus, second communication apparatus (communication apparatus different from the base station apparatus), UE (User Equipment), and user apparatus) are each provided with a plurality of transmission / reception antennas, and MIMO (Multi Input Multi Output) technology By using it, data signals are spatially multiplexed to realize high-speed data communication.

  Further, in 3GPP, carrier aggregation (CA: Carrier Aggregation) that performs communication simultaneously using a plurality of component carriers is adopted in order to realize high-speed data communication between a base station device and a terminal device (non-carrier aggregation). Patent Document 1).

  In 3GPP, frequency division duplex (FDD) and time division duplex (TDD) are adopted as a frame structure type of a bidirectional communication scheme (duplex scheme). In FDD, the full duplex method (Full Duplex) capable of bidirectional communication at the same time and the half duplex method (Half duplex method) that realizes bidirectional communication by switching one-way communication (Half) Duplex) is employed (Non-Patent Document 2). Note that LTE employing TDD may also be referred to as TD-LTE and LTE TDD.

  In 3GPP, there is a TDD-FDD carrier aggregation (TDD-FDD CA) that performs communication by aggregating a component carrier (TDD carrier) supporting TDD and a component carrier (FDD carrier) supporting FDD. It has been studied (Non-Patent Document 3).

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-UTRAN); Overall description; Stage 2 (Release 10), TS36.300 v10.10.0 (2013-06). 3rd Generation Partnership Project Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 8), TS36.211 v8.8.0 (2009-09). "Potential solutions of TDD-FDD joint operation", R1-132886, 3GPP TSG-RAN WG1 Meeting # 74, Barcelona, Spain, 19th-23rd Aug 2013.

  Processing delay increases by performing carrier aggregation by the TDD carrier and the FDD carrier, and therefore, there is a problem that appropriate communication cannot be performed.

  The present invention has been made in view of the above problems, and an object thereof is to provide a terminal device, a base station device, and a communication method that enable appropriate communication.

  (1) The present invention has been made to solve the above-described problem, and a terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus, and is a cross-carrier for uplink and downlink. When there is a function for performing scheduling independently, function information indicating that a function for performing cross-carrier scheduling for uplink is supported and / or a function for performing cross-carrier scheduling for downlink is supported. It transmits to the said base station apparatus, It is characterized by the above-mentioned.

  (2) A terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus, and has a function of independently performing cross-carrier scheduling for uplink and downlink. Information indicating whether a function for performing carrier scheduling is supported is transmitted to the base station apparatus, and information indicating whether a function for performing cross-carrier scheduling for a downlink is supported is transmitted to the base station apparatus. And

  (3) A base station apparatus according to an aspect of the present invention is a base station apparatus that communicates with a terminal apparatus, and performs cross-carrier scheduling for uplink and downlink on the function information transmitted from the terminal apparatus. If it is indicated that the function to be performed independently is supported, the setting related to the cross carrier scheduling for the uplink and the downlink is set independently for the terminal device, and the setting information is transmitted to the terminal device. It is characterized by.

  (4) A base station apparatus according to an aspect of the present invention is a base station apparatus that communicates with a terminal apparatus, and independently performs uplink cross-carrier scheduling on function information transmitted from the terminal apparatus. If the function is indicated, the setting regarding the cross carrier scheduling for the uplink is set, the setting information is transmitted to the terminal device, and the cross carrier scheduling for the downlink is independently performed on the function information transmitted from the terminal device. If the function is indicated, a setting related to downlink cross-carrier scheduling is set, and the setting information is transmitted to the terminal apparatus.

  (5) In addition, a communication method according to an aspect of the present invention is a communication method of a terminal apparatus that communicates with a base station apparatus, and has a function of performing cross-carrier scheduling independently for uplink and downlink. A step of setting in the function information whether or not a function of performing cross-carrier scheduling for a link is supported; and a step of setting in the function information of whether or not a function of performing cross-carrier scheduling for a downlink is supported; Transmitting the function information to the base station apparatus.

  (6) A communication method according to an aspect of the present invention is a communication method of a base station apparatus that communicates with a terminal device, the step of receiving function information transmitted from the terminal device, and the function information If it is shown that the function of performing the cross-carrier scheduling for the uplink is supported, the step of performing the setting related to the cross-carrier scheduling for the uplink, and the function of performing the cross-carrier scheduling for the downlink in the function information If it is shown that the mobile station supports the cross carrier scheduling for the downlink, the cross carrier scheduling for the uplink and / or the cross carrier schedule for the downlink. The settings for the ring, characterized in that it comprises the steps of: transmitting to the terminal device by using a higher layer signaling.

  Thus, the terminal device and the base station device can perform appropriate transmission control and reception control.

  According to the present invention, in a communication system in which a base station apparatus and a terminal apparatus communicate, the terminal apparatus can improve communication efficiency by performing appropriate transmission control and reception control.

It is a schematic block diagram which shows the structure of the base station apparatus 1 which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows the structure of the terminal device 2 which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the sub-frame pattern in TDD UL / DL setting. It is a flowchart which shows the procedure of the process 1 of the terminal device 2 which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of the process 3 of the terminal device 2 which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of the process 6 of the terminal device 2 which concerns on the 1st Embodiment of this invention.

  The communication system of the present embodiment employs carrier aggregation that performs communication by aggregating a plurality of component carriers. Since a cell can be configured using component carriers, carrier aggregation is sometimes referred to as cell aggregation. That is, the communication system of this embodiment can perform communication by aggregating a plurality of cells. In the cell aggregation in the communication system according to the present embodiment, communication is performed by aggregating a cell to which the TDD scheme is applied (TDD cell) and a cell to which the FDD scheme is applied (FDD cell) among a plurality of cells. That is, in the communication system of the present embodiment, cell aggregation in a plurality of cells in which different frame structure types are set. Note that the frame structure type may be referred to as a duplex mode. In LTE and LTE-A, frame structure type 1 is defined as FDD, and frame structure type 2 is defined as TDD.

  Cell aggregation is to perform communication by aggregating one primary cell and one or more secondary cells. Further, the primary cell may be configured using uplink component carriers and downlink component carriers, whereas the secondary cell may be configured using only downlink component carriers.

  The set serving cells (plural cells) include one primary cell and one or more secondary cells. A primary cell is a serving cell in which an initial connection establishment procedure has been performed, a serving cell that has initiated a connection re-establishment procedure, or a cell designated as a primary cell in a handover procedure. The secondary cell may be set at the time when the RRC connection is established or later. A plurality of serving cells may be configured by one base station apparatus 1, or a plurality of serving cells may be configured by a plurality of base station apparatuses 1.

  Also, uplink and downlink frequency bands (UL / DL operating band) and duplex modes (TDD, FDD) are associated with one index. In addition, uplink and downlink frequency bands (operating bands) and duplex modes are managed by one table. This index may be referred to as an E-UTRA operating band, an E-UTRA band, or a band. For example, index 1 may be referred to as band 1, index 2 as band 2, and index n as band n. For example, band 1 has an uplink operating band of 1920 MHz to 1980 MHz, a downlink operating band of 2110 MHz to 2170 MHz, and a duplex mode of FDD. The band 33 has an uplink and downlink operating band of 1900 MHz to 1920 MHz and a duplex mode of TDD.

  Also, a combination of bands (E-UTRA CA Band) capable of carrier aggregation may be set. For example, it may be shown that carrier aggregation by component carriers in band 1 and band 5 is possible. That is, whether or not carrier aggregation by component carriers in different bands may be indicated.

  The combination of the band supported by the terminal device 2 and the band capable of carrier aggregation is set in the function information (UE capability, UE-EUTRA-Capability) of the terminal device 2, and the base station device 1 By transmitting the function information, the functions of the terminal device 2 can be grasped.

  The present invention may be applied to some of a plurality of set cells. A cell set in the terminal device 2 may be referred to as a serving cell.

  TDD is a technology that enables downlink and uplink communications in a single frequency band (carrier frequency, component carrier) by time-division multiplexing uplink signals and downlink signals. In LTE, the downlink and the uplink can be switched in units of subframes by setting in advance. In TDD, subframes capable of downlink transmission (downlink subframes, subframes reserved for downlink transmission) and subframes capable of uplink transmission (uplink subframes, uplink transmission). Reserved subframes), and by providing a guard period (GP), there are subframes (special subframes) that can be switched between downlink transmission and uplink transmission in the time domain (symbol domain). Is defined. In the special subframe, a time domain in which downlink transmission is possible (a symbol corresponding to the time domain) is referred to as a downlink pilot time slot (DwPTS), and a time domain in which uplink transmission is possible ( A symbol corresponding to the time domain) is referred to as an uplink pilot time slot (UpPTS). For example, when the subframe i is a downlink subframe, the terminal apparatus 2 can receive a downlink signal transmitted from the base station apparatus 1, and a subframe j different from the subframe i is an uplink subframe. In the case of a frame, an uplink signal can be transmitted from the terminal device 2 to the base station device 1. When subframe k different from subframe i or subframe j is a special subframe, a downlink signal can be received in downlink time domain DwPTS, and an uplink signal can be received in uplink time domain UpPTS. Can be sent.

  In addition, in order to perform communication in the TDD scheme in LTE and LTE-A, specific information elements (TDD UL / DL configuration (TDD UL / DL configuration (s), TDD uplink-downlink configuration (s)), TDD configuration ( TDD configuration (s), tdd-Config, TDD config), UL / DL (UL-DL) configuration (uplink-downlink configuration (s))). Based on the notified information, the terminal device 2 can perform a transmission / reception process by regarding a certain subframe as an uplink subframe, a downlink subframe, or a special subframe.

  In addition, the configuration of the special subframe (the length of DwPTS, UpPTS, and GP in the special subframe) defines a plurality of patterns and is managed in a table. Each of the plurality of patterns is associated with a value (index), and when the value is notified, the terminal device performs processing of the special subframe based on the pattern associated with the notified value. . That is, information regarding the configuration of the special subframe can also be notified from the base station apparatus 1 to the terminal apparatus 2.

  Further, a traffic adaptive control technique that changes the ratio of uplink resources and downlink resources according to uplink traffic and downlink traffic (information amount, data amount, communication amount) may be applied to TDD. For example, the ratio between the downlink subframe and the uplink subframe can be dynamically changed. A downlink subframe and an uplink subframe can be adaptively switched for a certain subframe. Such a subframe is called a flexible subframe. In the flexible subframe, the base station apparatus 1 can receive an uplink signal or transmit a downlink signal according to a condition (situation). In addition, unless the base station apparatus 1 instructs the terminal apparatus 2 to transmit an uplink signal in the flexible subframe, the terminal apparatus 2 can perform reception processing by regarding the flexible subframe as a downlink subframe. In addition, the TDD for dynamically changing the ratio of the downlink subframe and the uplink subframe, the uplink and the downlink subframe, and the TDD UL / DL (re-) setting is dynamic TDD (DTDD: Dynamic TDD) or It may be called eIMTA (enhanced Interference Mitigation and Traffic Adaptation). For example, TDD UL / DL setting information may be transmitted by L1 signaling.

  On the other hand, FDD is a technology that enables downlink and uplink communications in different frequency bands (carrier frequency, component carrier).

  As the communication system, a cellular communication system in which a plurality of areas covered by the base station device 1 are arranged in a cell shape may be applied. A single base station apparatus 1 may manage a plurality of cells. Moreover, the single base station apparatus 1 may manage several RRH (Remote Radio Head). A single base station apparatus 1 may manage a plurality of local areas. Moreover, the single base station apparatus 1 may manage several HetNet (Heterogeneous Network). A single base station apparatus 1 may manage a plurality of low power base station apparatuses (LPN: Low Power Node).

  In the communication system, the terminal device 2 measures reference signal received power (RSRP) based on a cell-specific reference signal (CRS).

  In the communication system, communication may be performed using a carrier (component carrier) in which some physical channels and signals defined in LTE are not arranged. Here, such a carrier is referred to as a new carrier type (NCT). For example, the cell-specific reference signal, the physical downlink control channel, and the synchronization signal (primary synchronization signal and secondary synchronization signal) may not be arranged in the new carrier type. In addition, in a cell in which a new carrier type is set, a physical channel (PDCH: Physical Discovery Channel, NDS: New Discovery Signal (s), DRS: Discovery Reference Signal, DS: The introduction of Discovery Signal is under consideration. The new carrier type may be referred to as an additional carrier type (ACT). In addition, an existing carrier type may be referred to as a legacy carrier type (LCT) for NCT.

  In the present embodiment, “X / Y” includes the meaning of “X or Y”. In the present embodiment, “X / Y” includes the meanings of “X and Y”. In the present embodiment, “X / Y” includes the meaning of “X and / or Y”.

(Physical channel)
Main physical channels (or physical signals) used in LTE and LTE-A will be described. A channel means a medium used for signal transmission. A physical channel means a physical medium used for signal transmission. The physical channel may be added in the future in LTE and LTE-A and later standard releases, or the structure and format of the physical channel may be changed or added. Does not affect the description.

  In LTE and LTE-A, physical channel scheduling is managed using radio frames. One radio frame is 10 ms, and one radio frame is composed of 10 subframes. Further, one subframe is composed of two slots (that is, one slot is 0.5 ms). Also, resource blocks are used as a minimum scheduling unit in which physical channels are allocated. A resource block is a region where the frequency axis is composed of a certain frequency region composed of a set of a plurality of subcarriers (for example, 12 subcarriers) and a certain transmission time interval (for example, 1 slot, 7 symbols) Defined.

  In order to improve communication accuracy, a cyclic prefix (CP: Cyclic Prefix) corresponding to a redundant portion of the physical channel is added to the physical channel and transmitted. The number of symbols arranged in one slot varies depending on the length of the CP. For example, in the case of a normal CP, 7 symbols can be arranged in one slot, and in the case of an extended CP, 6 symbols can be arranged in one slot.

  Further, by reducing the subcarrier interval, 24 subcarriers can be arranged in one resource block. It may be applied to a specific physical channel.

  The physical channel corresponds to a set of resource elements that transmit information output from an upper layer. The physical signal is used in the physical layer and does not transmit information output from the upper layer. That is, higher layer control information such as a radio resource control (RRC) message and system information (SI) is transmitted on the physical channel.

  The downlink physical channel includes physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), physical multicast channel (PMCH), physical control format indicator channel (PCFICH). : Physical Control Format Indicator Channel), Physical Downlink Control Channel (PDCCH), Physical Hybrid ARQ Indicator Channel (PHICH), Enhanced Physical Downlink Control Channel (EPDCCH) Channel). Further, downlink physical signals include various reference signals and various synchronization signals. The downlink reference signal (DL-RS) includes a cell specific reference signal (CRS), a terminal specific reference signal (UERS), a channel state information reference signal (CSI). -RS: Channel State Information Reference Signal). The synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

  The uplink physical channel includes a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). In addition, the uplink physical signal includes various reference signals. The uplink reference signal includes a demodulation reference signal (DMRS) and a sounding reference signal (SRS).

  The synchronization signal is composed of three types of PSS and SSS composed of 31 types of codes arranged alternately in the frequency domain, and identifies the base station apparatus 1 by the combination of PSS and SSS. 504 physical layer cell identifiers (PCI: Physical layer Cell Identity, Physical Cell Identity, Physical Cell Identifier) and frame timing for radio synchronization are shown. The terminal device 2 specifies the cell identifier of the synchronization signal received by the cell search. Note that the cell identifier may be referred to as a cell ID. The physical layer cell identifier may be referred to as a physical cell ID.

  A physical broadcast channel (PBCH: Physical Broadcast Channel) is transmitted for the purpose of notifying control parameters (broadcast information and system information) commonly used by the terminal devices 2 in the cell. Also, broadcast information not notified by PBCH (for example, SIB1 and some system information) is transmitted by PDSCH via DL-SCH. As broadcast information, a cell global identifier (CGI: Cell Global Identifier) indicating a cell-specific identifier, a tracking area identifier (TAI: Tracking Area Identifier) for managing a standby area by paging, random access setting information (such as a transmission timing timer), Common radio resource setting information (shared radio resource setting information) is notified.

  The downlink reference signal is classified into a plurality of types according to its use. For example, a cell-specific reference signal (CRS) is a pilot signal transmitted at a predetermined power for each cell, and is downlinked periodically in the frequency domain and the time domain based on a predetermined rule. Link reference signal. The terminal device 2 measures the reception quality for each cell by receiving the cell-specific reference signal. In addition, the terminal device 2 uses the cell-specific reference signal as a reference signal for demodulating the physical downlink control channel or the physical downlink shared channel transmitted through the same antenna port as the cell-specific reference signal. The sequence used for the cell-specific reference signal is a sequence that can be identified for each cell. The CRS may be transmitted from the base station apparatus 1 in all downlink subframes, but the terminal apparatus 2 may receive only in the specified downlink subframe.

  The downlink reference signal is also used for estimating downlink propagation path fluctuations. The downlink reference signal used for estimating the channel fluctuation may be referred to as a channel state information reference signal (CSI-RS) or a CSI reference signal. In addition, a CSI reference signal that is not actually transmitted or transmitted at zero power is a zero power channel state information reference signal (ZP CSI-RS: Zero Power Channel State Information Reference Signals) or a zero power CSI reference. You may call it a signal. In addition, the CSI reference signal to which a signal is actually transmitted may be referred to as a non-zero power channel state information reference signal (NZP CSI-RS) or a non-zero power CSI reference signal. .

  Further, downlink resources used for measuring interference components may be referred to as channel state information interference measurement resources (CSI-IMR) or CSI-IM resources. Using the zero power CSI reference signal included in the CSI-IM resource, the terminal device 2 may perform measurement of an interference signal in order to calculate a CQI value. In addition, the downlink reference signal set individually for each terminal apparatus 2 includes a terminal apparatus specific reference signal (UERS: UE specific reference signals) or a dedicated reference signal (Dedicated Reference Signals), a downlink demodulation reference signal (DL DMRS: Downlink Demodulation Reference Signals) and used for demodulation of a physical downlink control channel or a physical downlink shared channel.

  Note that these downlink reference signal sequences may be generated based on pseudo-random sequences. Also, these downlink reference signal sequences may be generated based on Zadoff-Chu sequences. Also, these downlink reference signal sequences may be generated based on a Gold sequence. In addition, these downlink reference signal sequences may be pseudo-random sequences, Zadoff-Chu sequences, or gold sequence variants or modifications.

  A physical downlink shared channel (PDSCH) is used to transmit downlink data (DL-SCH). PDSCH is also used when system information is transmitted on DL-SCH. The radio resource allocation information of the physical downlink shared channel is indicated by the physical downlink control channel. The PDSCH is also used to notify parameters (information elements, RRC messages) related to the downlink and uplink.

  A physical downlink control channel (PDCCH: Physical Downlink Control Channel) is transmitted in some OFDM symbols from the head of each subframe, and resource allocation information according to the scheduling of the base station apparatus 1 is transmitted to the terminal apparatus 2, It is used for the purpose of instructing the adjustment amount of increase / decrease of transmission power. The terminal device 2 monitors (monitors) the physical downlink control channel addressed to itself before transmitting / receiving layer 3 messages (paging, handover command, RRC message, etc.), and when transmitting, the uplink grant, when receiving, the downlink grant It is necessary to acquire resource allocation information (also called downlink assignment) from the physical downlink control channel addressed to the own station. The physical downlink control channel is configured to be transmitted in the area of the resource block that is individually assigned from the base station apparatus 1 to the terminal apparatus 2 in addition to being transmitted by the OFDM symbol described above. It is also possible. When the physical downlink control channel transmitted in the area of the resource block allocated individually (dedicated) from the base station apparatus 1 to the terminal apparatus 2 is referred to as an enhanced physical downlink control channel (EPDCCH: Enhanced PDCCH) There is also. In addition, the PDCCH transmitted using the above-described OFDM symbol may be referred to as a first control channel. Also, the EPDCCH may be referred to as a second control channel. Further, the resource area to which the PDCCH can be allocated may be referred to as a first control channel area, and the resource area to which the EPDCCH can be allocated may be referred to as a second control channel area. In the present invention, PDCCH basically includes EPDCCH.

  The base station apparatus 1 may transmit the PCFICH, PHICH, PDCCH, EPDCCH, PDSCH, synchronization signal (PSS / SSS), and downlink reference signal in the DwPTS of the special subframe. Moreover, the base station apparatus 1 does not need to transmit PBCH in DwPTS of a special subframe.

  Moreover, the terminal device 2 may transmit PRACH and SRS in the UpPTS of the special subframe. Moreover, the terminal device 2 does not need to transmit PUCCH, PUSCH, and DMRS in UpPTS of a special subframe.

  Further, when the special subframe is configured only by GP and UpPTS, the terminal device 2 may transmit PUCCH and / or PUSCH and / or DMRS in the UpPTS of the special subframe.

  Here, the terminal device 2 monitors a set of PDCCH candidates and / or EPDCCH candidates. Hereinafter, for simplification of description, the PDCCH may include an EPDCCH. The PDCCH candidate indicates a candidate that the PDCCH may be mapped and transmitted by the base station apparatus 1. Further, PDCCH candidates are composed of one or a plurality of control channel elements (CCE). In addition, the monitor may include that the terminal device 2 tries to decode (decode) each PDCCH in the set of PDCCH candidates according to all the DCI formats to be monitored.

  Here, the set of PDCCH candidates that the terminal device 2 monitors is also referred to as a search space. The search space is a set of resources that may be used by the base station apparatus 1 for PDCCH transmission. A common search space (CSS: Common Search Space) and a terminal device specific search space (USS: UE-specific Search Space) are configured (defined and set) in the PDCCH region. Note that CSS and USS may be duplicated in the primary cell.

  CSS is used for transmission of downlink control information to a plurality of terminal apparatuses 2. That is, CSS is defined by resources common to the plurality of terminal devices 2. The USS is used for transmission of downlink control information to a specific terminal apparatus 2. That is, the USS is individually set for a specific terminal device 2. Further, the USS may be set redundantly for a plurality of terminal devices 2.

  The terminal device 2 monitors one CSS at each of the aggregation levels 4 and 8 for each non-DRX subframe of the primary cell.

  The terminal device 2 monitors CSS for PDCCH without CIF (Carrier Indicator Field).

  The downlink control information (DCI) is transmitted from the base station apparatus 1 to the terminal apparatus 2 in a specific format (configuration, format). This format may be referred to as a DCI format. Note that transmitting the DCI format includes transmitting DCI in a certain format. The DCI format can be rephrased as a format for transmitting DCI. A plurality of formats are prepared for the DCI format transmitted from the base station apparatus 1 to the terminal apparatus 2 (for example, DCI format 0/1 / 1A / 1B / 1C / 1D / 2 / 2A / 2B / 2C / 2D). / 3 / 3A / 4). In the DCI format, fields (bit fields) corresponding to various downlink control information are set.

  When the base station apparatus 1 transmits a common DCI (single DCI) to a plurality of terminal apparatuses 2 in a certain DCI format, the base station apparatus 1 transmits the terminals using the PDCCH (or EPDCCH) CSS and When DCI is individually transmitted in a certain DCI format, it is transmitted by PDCCH (or EPDCCH) USS.

  The DCI transmitted in the DCI format includes PUSCH and PDSCH resource allocation, modulation and coding scheme, sounding reference signal request (SRS request), channel state information request (CSI request), initial transmission of a single transport block, or There are a retransmission instruction, a transmission power control command for PUSCH, a transmission power control command for PUCCH, a cyclic shift of UL DMRS, an index of OCC (Orthogonal Code Cover), and the like. Various other DCIs are defined by the specifications.

  A format used for uplink transmission control (for example, scheduling of PUSCH and the like) may be referred to as an uplink DCI format (for example, DCI format 0/4) or DCI related to the uplink. In addition, the DCI format used for uplink transmission control may be referred to as an uplink grant (UL grant: Uplink grant). The format used for downlink reception control (eg, PDSCH scheduling) is changed to downlink DCI format (eg, DCI format 1 / 1A / 1B / 1C / 1D / 2 / 2A / 2B / 2C / 2D) or downlink. It may be referred to as related DCI. The DCI format used for downlink reception control may be referred to as a downlink grant (DL grant: Downlink grant) or a downlink assignment (DL assignment: Downlink assignment). A format used for adjusting the transmission power of each of the plurality of terminal apparatuses 2 may be referred to as a group triggering DCI format (for example, DCI format 3 / 3A).

  For example, DCI format 0 is information related to PUSCH resource allocation and modulation scheme required for scheduling one PUSCH in one serving cell, information related to a transmission power control (TPC) command for the PUSCH, etc. Used to send Also, these DCIs are transmitted by PDCCH / EPDCCH. It can be said that the DCI format is composed of at least one DCI.

  The terminal device 2 monitors the PDCCH in the CSS and / or USS of the PDCCH region, and detects the PDCCH addressed to itself.

  For transmission of downlink control information (transmission on the PDCCH), the RNTI assigned to the terminal device 2 by the base station device 1 is used. Specifically, a cyclic redundancy check (CRC) parity bit is added to the DCI format (which may be downlink control information), and after the CRC parity bit is added, the CRC parity bit is scrambled by the RNTI.

  The terminal device 2 tries to decode the DCI format to which the CRC parity bit scrambled by the RNTI is added, and detects the DCI format in which the CRC is successful as the DCI format addressed to the own device (also called blind decoding). ) That is, the terminal device 2 tries to decode the PDCCH with the CRC scrambled by the RNTI, and detects the PDCCH in which the CRC is successful as the PDCCH addressed to the own device.

  The terminal apparatus 2 attempts decoding (performs blind decoding) in accordance with the aggregation level of CSS and USS, the number of PDCCH candidates, and the size of the DCI format (DCI format size, payload size of the DCI format). For example, in CSS, there are 4 and 8 aggregation levels, the number of PDCCH candidates is 6 and 4 in total, and there are two types of DCI formats with different sizes, so the number of blind decoding for CSS is 12 times. It becomes. That is, if the DCI addressed to the terminal device 2 is transmitted using the PDCCH by CSS, the terminal device 2 can detect any DCI format by performing blind decoding up to 12 times in CSS. it can. Further, in USS, there are 1, 2, 4, and 8 aggregation levels, and the number of PDCCH candidates is 16, 6, 2, and 2, respectively, and there are three types of DCI formats with different sizes in USS. Therefore, the blind decoding number for USS is 48 times. That is, if the DCI addressed to the terminal device 2 is transmitted using the PDCCH in the USS, the terminal device 2 can detect any DCI format by performing blind decoding up to 48 times in the USS. it can. That is, if the DCI addressed to itself is transmitted using PDCCH, the terminal device 2 can detect any DCI format by performing blind decoding up to 60 times. The number of blind decoding is the number of DCI formats having different sizes (DCI formats having different sizes such as 40 bits and 44 bits), the aggregation level of search space, the number of PDCCH candidates, and the number of component carriers (cells) that perform cross carrier scheduling. Determine by number. In addition, if the sizes are the same, the terminal device 2 performs blind decoding as one DCI format even if different types of DCI formats are used. For example, since the sizes of DCI format 0 and DCI format 1A are the same, it is regarded as one DCI format and blind decoding is performed. Also, the DCI format monitored by the terminal device 2 depends on the transmission mode set in each serving cell.

  Further, the total number (or threshold value) of blind decoding may be set (defined) in advance in consideration of the reception processing delay of the terminal device 2. Note that the total number of blind decoding may be different depending on whether carrier aggregation is set. That is, the total number of blind decoding may be variable depending on the number of component carriers (serving cells) that perform blind decoding.

  When the carrier aggregation is set, the terminal device 2 may be scheduled with a plurality of serving cells. However, at most one random access procedure is performed regardless of the number of serving cells. In cross-carrier scheduling with a carrier indicator field (CIF), the PDCCH of one serving cell can schedule resources for other serving cells. However, cross carrier scheduling is not applied to the primary cell. The primary cell is scheduled on the PDCCH of the primary cell. Moreover, when PDCCH of a secondary cell is set, cross-carrier scheduling is not applied with respect to the secondary cell. When the PDCCH of the secondary cell is not set, cross carrier scheduling may be applied to the secondary cell.

  In cross-carrier scheduling, a CIF (Carrier Indicator Field) is included in an uplink grant (DCI format related to uplink) or downlink grant (DCI format related to downlink) and transmitted in a certain cell, Uplink grants or downlink grants for different cells can be transmitted. That is, it is possible to control uplink / downlink transmission for a plurality of cells with one cell using a DCI format including CIF.

  The terminal device 2 in which the CIF related to monitoring the PDCCH is set in the serving cell c monitors the PDCCH in which the CRC scrambled by the C-RNTI is set in the CDC and the PDCCH USS of the serving cell c.

  The terminal apparatus 2 in which the CIF related to the monitoring of the PDCCH in the primary cell is set monitors the PDCCH in which the CRC scrambled by the SPS-RNTI is set in the CIF and the PDCCH USS of the primary cell.

  In cross carrier scheduling, the base station apparatus 1 is notified that the terminal apparatus 2 supports the function using the function information (UE-EUTRA-Capability), and the base station apparatus 1 is configured for cross carrier scheduling ( (CrossCarrierSchedulingConfig) is performed on the terminal device 2 and the setting information is transmitted to the terminal device 2, communication can be performed using cross carrier scheduling. This setting information may be notified using higher layer signaling.

  The setting related to cross carrier scheduling may include information (cif-Presence) indicating whether or not CIF is included in the DCI format of PDCCH / EPDCCH. In addition, the settings related to cross carrier scheduling include information (schedulingCellId) indicating the cells that signal downlink allocation (downlink grant) and uplink grant (which cell signals downlink allocation and uplink grant). May be. This information is called scheduling cell ID information. The setting related to cross carrier scheduling may include information (pdsch-Start) indicating a PDSCH start OFDM symbol for the cell indicated by the scheduling cell ID information. Note that the scheduling cell ID information may be set independently for the uplink and the downlink for the terminal device 2 that independently supports the function of performing cross-carrier scheduling for the uplink and the downlink. Also, information indicating the PDSCH start OFDM symbol may be set only for the downlink.

  When carrier aggregation is set, downlink resources for semi-persistent scheduling are set in the primary cell, and only the PDCCH allocation for the primary cell can be prioritized over the semi-persistent allocation.

  When carrier aggregation is set, uplink resources for semi-persistent scheduling are set in the primary cell, and only the PDCCH allocation for the primary cell can be prioritized over the semi-persistent allocation.

  Further, the link between the uplink and the downlink makes it possible to distinguish the serving cell to which the downlink grant or the uplink grant in the absence of CIF is applied. The downlink grant received in the primary cell corresponds to the downlink transmission in the primary cell. Further, the uplink grant received in the primary cell corresponds to the uplink transmission in the primary cell. Moreover, the downlink grant received in the secondary cell #n corresponds to the downlink transmission in the secondary cell #n. Further, the uplink grant received by the secondary cell #n corresponds to the uplink transmission in the secondary cell #n. When uplink usage is not set for the secondary cell #n, the uplink grant is ignored by the received terminal device 2.

  In another serving cell, when it is set to monitor PDCCH with CIF corresponding to a certain secondary cell, the terminal device 2 does not expect to monitor the PDCCH of the secondary cell. In that case, the base station apparatus 1 does not need to transmit DCI with respect to the terminal device 2 using PDCCH by the secondary cell.

  Here, the RNTI includes a C-RNTI (Cell-Radio Network Temporary Identifier). C-RNTI is a unique (unique) identifier used for RRC connection and scheduling identification. C-RNTI is utilized for dynamically scheduled unicast transmissions. In addition, as for C-RNTI, when carrier aggregation is set, C-RNTI (same C-RNTI) of the same value is applied by all the serving cells.

  The RNTI includes Temporary C-RNTI. Temporary C-RNTI is an identifier used for a random access procedure. For example, the terminal device 2 may decode the DCI format (for example, DCI format 0) related to the uplink to which the CRC scrambled by Temporary C-RNTI is added using only CSS. Further, the terminal device 2 may attempt to decode the DCI format (for example, DCI format 1A) related to the downlink to which the CRC scrambled by Temporary C-RNTI is added by using CSS and USS.

  Also, when transmitting DCI by CSS, the base station apparatus 1 adds a CRC parity bit scrambled by Temporary C-RNTI or C-RNTI to DCI (DCI format), and when transmitting DCI by USS, CRC scrambled with C-RNTI may be added to (DCI format).

  The physical uplink shared channel (PUSCH) is mainly used for transmitting uplink data and uplink control information (UCI). The UCI transmitted on the PUSCH includes channel state information (CSI: Channel State Information) and / or ACK / NACK. Moreover, CSI transmitted by PUSCH includes aperiodic CSI (A-CSI: Aperiodic CSI) and periodic CSI (P-CSI: Periodic CSI). Similarly to the downlink, the resource allocation information of the physical uplink shared channel is indicated by the physical downlink control channel. Also, the PUSCH scheduled by the dynamic scheduling grant transmits uplink data. Moreover, PUSCH scheduled by a random access response grant transmits the information (for example, the identification information of the terminal device 2, message 3) of the local station relevant to random access. Moreover, the parameter used in order to set the transmission power with respect to transmission by PUSCH may differ according to the kind of detected grant. The control data is transmitted in the form of channel quality information (CQI and / or PMI), HARQ response information (HARQ-ACK), and rank information (RI). That is, the control data is transmitted in the form of uplink control information.

  The physical uplink control channel (PUCCH) is an acknowledgment (ACK / NACK: Acknowledgement / Negative Acknowledgement) of downlink data transmitted on the physical downlink shared channel and downlink propagation path information (channel). (Status information) notification and scheduling request (SR: Scheduling Request) which is an uplink resource allocation request (radio resource request). Channel State Information (CSI) includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Precoding Type Indicator (PTI), Rank Indicator ( RI: Rank Indicator). Each indicator (Indicator) may be expressed as an indication (Indication), but its use and meaning are the same. Also, the PUCCH format may be switched according to the UCI to be transmitted. For example, if the UCI is composed of HARQ ACK and / or SR, the UCI may be transmitted in the format 1 / 1a / 1b / 3 PUCCH (PUCCH format 1 / 1a / 1b / 3). Further, when the UCI is composed of CSI, the UCI may be transmitted in a PUCCH (PUCCH format 2 / 2a / 2b) of format 2 / 2a / 2b. The PUCCH format 1 / 1a / 1b includes a shortened format that is punctured by one symbol and a normal format that is not punctured in order to avoid collision with the SRS. For example, when simultaneous transmission of PUCCH and SRS is effective in the same subframe, PUCCH format 1 / 1a / 1b is transmitted in a shortened format in the SRS subframe. When simultaneous transmission of PUCCH and SRS is not valid in the same subframe, PUCCH format 1 / 1a / 1b is transmitted in the standard format in the SRS subframe. In that case, even if transmission of SRS arises, SRS does not need to be transmitted.

  CSI report includes periodic CSI report (P-CSI report) that reports channel state information when periodic or event conditions for triggering CSI report are satisfied, and is included in DCI format There is an aperiodic CSI report (A-CSI reporting) for reporting channel state information when a CSI report is requested by a CSI request. Periodic CSI reporting is performed on PUCCH or PUSCH, and aperiodic CSI reporting is performed on PUSCH. When instructed based on information (CSI request) included in the DCI format, the terminal device 2 can also transmit CSI without uplink data on the PUSCH. That is, P-CSI is transmitted using PUCCH or PUSCH, and A-CSI is transmitted using PUSCH. When the CSI report is requested based on information (CSI request) included in the DCI format, the terminal device 2 can also transmit CSI (A-CSI) without uplink data on the PUSCH.

  PUCCH subframes (reporting instances) capable of CSI reporting are determined based on a period and a subframe offset associated with an index (CQIPMI index, RI index) set in an upper layer. The index set in the upper layer can be set for each subframe set set for measuring CSI. When only one index is set for a plurality of subframe sets, the index may be regarded as common between the subframe sets.

  For the terminal device 2 set in the transmission modes 1 to 9, one P-CSI report for each serving cell is set by higher layer signaling.

  For the terminal device 2 configured in the transmission mode 10, one or more P-CSI reports for each serving cell are configured by higher layer signaling.

  A parameter (PUCCH_format1-1_CSI_reporting_mode) in which an 8CSI-RS port is set for the terminal device 2 set in the transmission mode 9 or 10 and a single PMI reporting mode (mode 1-1) is set by wide layer CQI by higher layer signaling. ) To set submode 1 or submode 2.

  For a UE-selected subband CQI (UE-selected subband CQI), a CQI report in a subframe of a serving cell indicates the channel quality in a specific part (part) of the serving cell bandwidth indicated as a bandwidth part. It is a report.

  The CSI report type supports the PUCCH CSI report mode. The CSI reporting type may be referred to as a PUCCH reporting type. Type 1 reporting supports CQI feedback for terminal selection subbands. Type 1a reporting supports subband CQI and a second PMI feed bank. Type 2, type 2b, and type 2c reports support wideband CQI and PMI feedback. Type 2a reports support wideband PMI feedbanks. Type 3 reports support RI feedback. Type 4 reports support wideband CQI. Type 5 reports support RI and wideband PMI feedback. Type 6 reports support RI and PTI feedback.

  The uplink reference signal (UL-RS) is a demodulation reference signal (DMRS: Demodulation) used by the base station apparatus 1 to demodulate the physical uplink control channel PUCCH and / or the physical uplink shared channel PUSCH. Reference Signal) and a sounding reference signal (SRS) used by the base station apparatus 1 mainly for estimating an uplink channel state are included. The sounding reference signal is requested to be transmitted by a periodic sounding reference signal (P-SRS: Periodic SRS) that is set to be periodically transmitted by an upper layer and an SRS request included in the downlink control information format. Aperiodic sounding reference signal (A-SRS). The uplink reference signal may be referred to as an uplink pilot signal or an uplink pilot channel.

  Note that these uplink reference signal sequences may be generated based on pseudo-random sequences. In addition, these uplink reference signal sequences may be generated based on a Zadoff-Chu sequence. In addition, these uplink reference signal sequences may be generated based on a gold sequence. Further, the uplink reference signal sequence may be a pseudo-random sequence, a Zadoff-Chu sequence, or a variant or modification of a Gold sequence.

  In addition, the periodic sounding reference signal may be referred to as a periodic sounding reference signal or a trigger type 0 sounding reference signal (Trigger Type 0 SRS). In addition, the aperiodic sounding reference signal may be referred to as an aperiodic sounding reference signal or a trigger type 1 sounding reference signal (Trigger Type 1 SRS).

  Furthermore, A-SRS uses a signal specialized for uplink channel estimation (for example, sometimes referred to as trigger type 1a SRS) and channel reciprocity in TDD in cooperative communication. The channel state (CSI, CQI, PMI, RI) may be divided into signals (for example, sometimes referred to as trigger type 1b SRS) used to cause the base station apparatus 1 to measure. DMRS is set corresponding to each of PUSCH and PUCCH. DMRS is time-multiplexed in the same subframe as PUSCH or PUCCH and transmitted.

  Also, DMRS may have different time multiplexing methods for PUSCH and PUCCH. For example, DMRS for PUSCH is arranged in one symbol in one slot composed of 7 symbols, whereas DMRS for PUCCH is arranged in three symbols in one slot composed of 7 symbols.

  The SRS is notified of various parameters (bandwidth, cyclic shift, transmission subframe, etc.) by higher layer signaling. In addition, in SRS, a subframe in which SRS is transmitted is determined based on information on a transmission subframe included in the setting of SRS notified by higher layer signaling. Information related to transmission subframes includes information set specifically for cells (shared information) and information set specifically for terminal devices (dedicated information and individual information). The information set in a cell-specific manner includes information indicating a subframe in which the SRS shared by all the terminal devices 2 in the cell is transmitted. Further, the information set specifically for the terminal device includes information indicating a subframe offset and a periodicity that are a subset of the subframes set specific to the cell. With these pieces of information, the terminal device 2 can determine a subframe in which an SRS can be transmitted (sometimes referred to as an SRS subframe or an SRS transmission subframe). In addition, when transmitting a PUSCH in a subframe in which an SRS set specifically for a cell is transmitted, the terminal apparatus 2 punctures the PUSCH time resource by the amount of the symbol for which the SRS is transmitted, and the PUSCH is transmitted using the time resource. Can be sent. As a result, it is possible to avoid collision between PUSCH transmission and SRS transmission between the terminal devices 2. The terminal device 2 that transmits PUSCH can prevent characteristic deterioration. Moreover, channel estimation accuracy can be ensured for the terminal device 2 that transmits the SRS. Here, the information set uniquely for the terminal device may be set independently for P-SRS and A-SRS.

  For example, the first uplink reference signal is periodically transmitted based on the set transmission subframe when various parameters are set by higher layer signaling. In addition, the second uplink reference signal is aperiodically transmitted when a transmission request is indicated by a field (SRS request) related to the transmission request for the second uplink reference signal included in the downlink control information format. Sent. When the SRS request included in a certain downlink control information format indicates an index (value) corresponding to positive or positive, the terminal device 2 transmits an A-SRS in a predetermined transmission subframe. Moreover, the terminal device 2 does not transmit A-SRS in a predetermined subframe when the detected SRS request indicates an index (value) corresponding to negative or negative. Note that information (shared parameters, shared information) set specifically for each cell is reported using system information or a dedicated control channel (DCCH). In addition, information (dedicated parameters, individual parameters, dedicated information, and individual information) set specifically for the terminal device is notified using a common control channel (CCCH). Such information may be notified by an RRC message. The RRC message may be notified by an upper layer.

  A physical random access channel (PRACH) is a channel used for notifying a preamble sequence and has a guard time. The preamble sequence is configured so as to express 6-bit information by preparing 64 types of sequences. The physical random access channel is used as a means for accessing the base station device 1 by the terminal device 2. The terminal apparatus 2 transmits a radio resource request when a physical uplink control channel is not set for a scheduling request (SR), and transmission timing adjustment information necessary for matching the uplink transmission timing with the reception timing window of the base station apparatus. A physical random access channel is used to request the base station apparatus 1 (also referred to as timing advance (TA)).

  Specifically, the terminal device 2 transmits a preamble sequence using the radio resource for the physical random access channel set by the base station device 1. The terminal device 2 that has received the transmission timing adjustment information sets a transmission timing timer that measures the effective time of the transmission timing adjustment information that is commonly set by the broadcast information (or set individually by the layer 3 message), The uplink state is managed while the transmission timing timer is valid (during time measurement) during the transmission timing adjustment state, and outside the valid period (during stop), the transmission timing is not adjusted (transmission timing is not adjusted). The layer 3 message is a control plane (C-plane: Control-plane) message exchanged in the radio resource control (RRC) layer between the terminal device 2 and the base station device 1, and is an RRC signaling or RRC message. Used interchangeably with RRC signaling may also be referred to as higher layer signaling or dedicated signaling.

  The random access procedure includes two random access procedures: a contention based random access procedure and a non-contention based random access procedure. The contention-based random access procedure is a random access in which a collision may occur between a plurality of terminal devices 2.

  Further, the non-contention based random access procedure is a random access in which no collision occurs between a plurality of terminal devices 2.

  The non-contention based random access procedure consists of three steps, and a random access preamble assignment is notified from the base station apparatus 1 to the terminal apparatus 2 by downlink dedicated signaling. . At that time, the random access preamble assignment is transmitted by the source base station apparatus (Source eNB) for the handover by the base station apparatus 1 assigning a non-contention random access preamble to the terminal apparatus 2, and the target base station apparatus In the case of a handover command generated by (Target eNB) or downlink data arrival, it is signaled by PDCCH.

  The terminal apparatus 2 that has received the random access preamble assignment transmits a random access preamble (message 1) using the RACH in the uplink. At that time, the terminal device 2 transmits the allocated non-contention random access preamble.

  The base station apparatus 1 that has received the random access preamble transmits a random access response to the terminal apparatus 2 using downlink data (DL-SCH: Downlink Shared Channel). In addition, the information transmitted in the random access response includes the first uplink grant (random access response grant) for handover and timing adjustment information (Timing Alignment information), timing adjustment information for downlink data arrival, and a random access preamble identifier. included. The downlink data may be referred to as downlink shared channel data (DL-SCH data).

  Here, the non-contention based random access procedure is applied to handover, downlink data arrival, and positioning. The contention-based random access procedure is applied to initial access from RRC_IDLE, RRC connection re-establishment, handover, downlink data arrival, and uplink data arrival.

  The random access procedure according to the present embodiment is a contention-based random access procedure. An example of a contention based random access procedure will be described.

  The terminal device 2 acquires the system information block type 2 (SIB2) transmitted by the base station device 1. SIB2 is a setting (common information) common to all terminal apparatuses 2 (or a plurality of terminal apparatuses 2) in a cell. For example, the common settings include PRACH settings.

  The terminal device 2 randomly selects a random access preamble number. Also, the terminal device 2 transmits a random access preamble (message 1) of the selected number to the base station device 1 using the PRACH. The base station apparatus 1 estimates uplink transmission timing using a random access preamble.

  The base station apparatus 1 transmits a random access response (message 2) using PDSCH. The random access response includes a plurality of pieces of information for the random access preamble detected by the base station device 1. For example, the plurality of information includes a random access preamble number, a Temporary C-RNTI, a TA command (Timing Advance Command), and a random access response grant.

  The terminal device 2 transmits (initial transmission) uplink data (message 3) using the PUSCH scheduled using the random access response grant. The uplink data includes an identifier (information indicating Initial UE-Identity or C-RNTI) for identifying the terminal device 2.

  When the decoding of the uplink data fails, the base station apparatus 1 instructs the retransmission of the uplink data using the DCI format to which the CRC parity bits scrambled by the Temporary C-RNTI are added. When the terminal apparatus 2 is instructed to retransmit uplink data by the DCI format, the terminal apparatus 2 uses the same uplink for the PUSCH scheduled using the DCI format to which the CRC parity bit scrambled by the Temporary C-RNTI is added. Resend link data.

  Further, when the decoding of the uplink data fails, the base station apparatus 1 can instruct retransmission of the uplink data using PHICH (NACK). When the terminal apparatus 2 is instructed to retransmit uplink data by the NACK, the terminal apparatus 2 retransmits the same uplink data using the PUSCH.

  The base station apparatus 1 can know which terminal apparatus 2 was transmitting the random access preamble and the uplink data by successfully decoding the uplink data and acquiring the uplink data. That is, the base station apparatus 1 cannot know which terminal apparatus 2 is transmitting the random access preamble and the uplink data before successfully decoding the uplink data.

  When the base station apparatus 1 receives the message 3 including the InitialUE-Identity, the base station apparatus 1 uses the PDSCH to generate a contention resolution identity (message 4) generated based on the received InitialUE-Identity. Transmit to device 2. When the received contention resolution identifier matches the transmitted InitialUE-Identity, the terminal device 2 considers (1) that the contention resolution of the random access preamble has succeeded, and (2) Temporary C- Set the value of RNTI to C-RNTI, (3) discard Temporary C-RNTI, and (4) consider random access procedure completed successfully.

  Further, when the base station apparatus 1 receives the message 3 including the information indicating the C-RNTI, the base station apparatus 1 converts the DCI format (message 4) to which the CRC parity bit scrambled by the received C-RNTI is added into the terminal apparatus 2. Send to. When the terminal apparatus 2 decodes the DCI format to which the CRC parity bit scrambled by the C-RNTI is added, the terminal apparatus 2 regards (1) that the contention resolution of the random access preamble has succeeded, and (2) Temporary C. -Discard the RNTI and (3) consider the random access procedure completed correctly.

  That is, the base station apparatus 1 schedules PUSCH using a random access response grant as part of a contention based random access procedure (as part of contention based random access procedure).

  The terminal device 2 transmits uplink data (message 3) using PUSCH scheduled using the random access response grant. That is, the terminal device 2 performs transmission on the PUSCH corresponding to the random access response grant as part of the contention-based random access procedure.

  In addition, the base station apparatus 1 schedules PUSCH using a DCI format to which a CRC scrambled by Temporary C-RNTI is added as part of a contention-based random access procedure. Further, the base station apparatus 1 schedules / instructs transmission on the PUSCH using PHICH (NACK) as part of the contention-based random access procedure.

  The terminal device 2 transmits (retransmits) the uplink data (message 3) using the PUSCH scheduled using the DCI format to which the CRC scrambled by the Temporary C-RNTI is added. Also, the terminal device 2 transmits (retransmits) uplink data (message 3) using the scheduled PUSCH in response to the reception of PHICH. That is, the terminal device 2 performs transmission on the PUSCH corresponding to retransmission of the same uplink data (transport block) as part of the contention-based random access procedure.

  In the TDD scheme, the base station apparatus 1 may transmit the PCFICH, PHICH, PDCCH, EPDCCH, PDSCH, synchronization signal, and downlink reference signal in the DwPTS of the special subframe. Moreover, the base station apparatus 1 does not need to transmit PBCH in DwPTS of a special subframe.

  Further, in the TDD scheme, the terminal device 2 may transmit the PRACH and SRS in the UpPTS of the special subframe. Moreover, the terminal device 2 does not need to transmit PUCCH, PUSCH, and DMRS in UpPTS of a special subframe.

  Further, in the TDD scheme, the terminal device 2 may transmit PUCCH and / or PUSCH and / or DMRS in the UpPTS of the special subframe when the special subframe is configured only by GP and UpPTS. .

  Hereinafter, the logical channel will be described. The logical channel is used to transmit RRC messages and information elements. Also, the logical channel is transmitted on the physical channel via the transport channel.

  A broadcast control channel (BCCH) is a logical channel used for broadcasting system control information. For example, system information and information necessary for initial access are transmitted using this channel. MIB (Master Information Block) and SIB1 (System Information Block Type 1) are transmitted using this logical channel.

  A common control channel (CCCH) is a logical channel used to transmit control information between a terminal apparatus that does not have an RRC connection with the network and the network. For example, terminal-specific control information and setting information are transmitted using this logical channel.

  The dedicated control channel (DCCH) is a logical channel used to transmit dedicated control information (individual control information) bidirectionally between the terminal apparatus 2 having the RRC connection and the network. For example, cell-specific reconfiguration information is transmitted using this logical channel.

  Signaling using CCCH or DCCH may be collectively referred to as RRC signaling.

  Information regarding uplink power control is notified as information notified as broadcast information, information notified as information shared between terminal devices 2 in the same cell (shared information), and dedicated information specific to the terminal device. And information. The terminal device 2 sets transmission power based on only information notified as broadcast information, or information notified as broadcast information / shared information and information notified as dedicated information.

  The radio resource control setting sharing information may be notified as broadcast information (or system information). Further, the radio resource control setting shared information may be notified as dedicated information (mobility control information).

  Radio resource setting includes random access channel (RACH) setting, broadcast control channel (BCCH) setting, paging control channel (PCCH) setting, physical random access channel (PRACH) setting, physical downlink shared channel (PDSCH) setting, physical uplink Link shared channel (PUSCH) setting, physical uplink control channel (PUCCH) setting, sounding reference signal (SRS) setting, setting related to uplink power control, setting related to uplink cyclic prefix length, and the like. That is, the radio resource setting is set to notify a parameter used for generating a physical channel / physical signal. The notified parameter (information element) may be different between the case of being notified as broadcast information and the case of being notified as reset information.

  Information necessary to set parameters for various physical channels / physical signals (PRACH, PUCCH, PUSCH, SRS, UL DMRS, CRS, CSI-RS, PDCCH, PDSCH, PSS / SSS, UERS, PBCH, PMCH, etc.) The element includes shared setting information shared between the terminal devices 2 in the same cell and dedicated setting information set for each terminal device 2. The sharing setting information may be transmitted as system information. Further, the share setting information may be transmitted as dedicated information when resetting. These settings include parameter settings. The parameter setting includes setting of a parameter value. The parameter setting includes setting of an index value when the parameter is managed in a table.

  Information on the parameters of the physical channel is transmitted to the terminal device 2 using an RRC message. That is, the terminal device 2 sets resource allocation and transmission power of each physical channel based on the received RRC message. The RRC message includes a broadcast channel message, a multicast channel message, a paging channel message, a downlink channel message, an uplink channel message, and the like. Each RRC message may be configured to include an information element (IE). The information element may include information corresponding to a parameter. The RRC message may be referred to as a message. A message class is a set of one or more messages. The message may include an information element. Information elements include information elements related to radio resource control, information elements related to security control, information elements related to mobility control, information elements related to measurement, information elements related to multimedia broadcast multicast service (MBMS), and the like. The information element may include a lower information element. The information element may be set as a parameter. The information element may be defined as control information indicating one or more parameters.

  The information element (IE) is used to define (specify and set) parameters for various channels / signals / information by system information (SI) or dedicated signaling. An information element includes one or more fields. An information element may be composed of one or more information elements. The field included in the information element may be referred to as a parameter. That is, the information element may include one type (one) or more parameters. Also, the terminal device 2 performs radio resource allocation control, uplink power control, transmission control, and the like based on various parameters. System information may be defined as an information element.

  An information element may be set in the field constituting the information element. A parameter may be set in a field constituting the information element.

  The RRC message includes one or more information elements. An RRC message in which a plurality of RRC messages are set is referred to as a message class.

  Parameters relating to uplink transmission power control notified to the terminal apparatus 2 using system information include standard power for PUSCH, standard power for PUCCH, propagation path loss compensation coefficient α, and a list of power offsets set for each PUCCH format. , There is a power offset for the preamble and message 3. Further, the parameters related to the random access channel notified to the terminal device 2 using the system information include a parameter related to the preamble, a parameter related to transmission power control of the random access channel, and a parameter related to transmission control of the random access preamble. These parameters are used at the time of initial access or reconnection / re-establishment after a radio link failure (RLF) occurs.

  Information used for setting the transmission power may be notified to the terminal device 2 as broadcast information. Further, the information used for setting the transmission power may be notified to the terminal device 2 as shared information. Moreover, the information used for setting the transmission power may be notified to the terminal device 2 as dedicated information (individual information).

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described. The communication system according to the first embodiment includes a base station device 1 (hereinafter, access point, point, transmission point, reception point, cell, serving cell, transmission device, reception device, transmission station, reception station, transmission antenna group, transmission antenna. As a port group, a receiving antenna group, a receiving antenna port group, a communication device, a communication terminal, and an eNodeB, a primary base station device (macro base station device, first base station device, first communication device, serving) Base station apparatus, anchor base station apparatus, master base station apparatus, first access point, first point, first transmission point, first reception point, macro cell, first cell, primary cell, master cell, (Also called a master small cell). In addition, a primary cell and a master cell (master small cell) may be comprised independently. Furthermore, the communication system in the first embodiment includes a secondary base station apparatus (RRH (Remote Radio Head), a remote antenna, an extended antenna, a distributed antenna, a second access point, a second point, a second transmission point, Second receiving point, reference point, low power base station (LPN), micro base station, pico base station, femto base station, small base station, local area base station, phantom base Station device, home (indoor) base station device (Home eNodeB, Home NodeB, HeNB, HNB), second base station device, second communication device, coordinated base station device group, coordinated base station device set, coordinated base Station equipment, micro cell, pico cell, femto cell, small cell, phantom cell, local area, second cell, also called secondary cell) You may. The communication system according to the first embodiment includes a terminal device 2 (hereinafter, a mobile station, a mobile station device, a mobile terminal, a receiving device, a transmitting device, a receiving terminal, a transmitting terminal, a third communication device, and a receiving antenna group. A reception antenna port group, a transmission antenna group, a transmission antenna port group, a user apparatus, and a user terminal (UE: User Equipment). Here, the secondary base station apparatus may be shown as a plurality of secondary base station apparatuses. For example, the primary base station apparatus and the secondary base station apparatus use a heterogeneous network arrangement, and part or all of the coverage of the secondary base station apparatus is included in the coverage of the primary base station apparatus, and communication with the terminal apparatus is possible. It may be done.

  The communication system according to the first embodiment includes a base station device 1 and a terminal device 2. A single base station apparatus 1 may manage one or more terminal apparatuses 2. The single base station apparatus 1 may manage one or more cells (serving cell, primary cell, secondary cell, femto cell, pico cell, small cell, phantom cell). Moreover, the single base station apparatus 1 may manage one or more frequency bands (component carrier, carrier frequency). Moreover, the single base station apparatus 1 may manage one or more low power base station apparatuses (LPN: Low Power Node). Moreover, the single base station apparatus 1 may manage one or more home (indoor) base station apparatuses (HeNB: Home eNodeB). A single base station apparatus 1 may manage one or more access points. The base station devices 1 may be connected by wire (optical fiber, copper wire, coaxial cable, etc.) or wirelessly (X2 interface, X3 interface, Xn interface, etc.). That is, between a plurality of base station apparatuses 1, communication may be performed at high speed (no delay) using an optical fiber (Ideal backhaul), and communication may be performed at low speed using an X2 interface (Non ideal backhaul). At that time, various pieces of information of the terminal device 2 (setting information, channel state information (CSI), function information (UE capability) of the terminal device 2, information for handover, etc.) may be communicated. The plurality of base station devices 1 may be managed by a network. Moreover, the single base station apparatus 1 may manage one or more relay station apparatuses (Relay).

  Further, the communication system according to the first embodiment may realize cooperative communication (CoMP: Coordination Multiple Points) with a plurality of base station apparatuses, low-power base station apparatuses, or home base station apparatuses. That is, the communication system according to the first embodiment may perform dynamic point selection (DPS) that dynamically switches a point (transmission point and / or reception point) for communicating with the terminal device 2. Further, the communication system according to the first embodiment may perform coordinated scheduling (CS: Coordinated Scheduling) or coordinated beamforming (CB). The communication system according to the first embodiment may perform joint transmission (JT: Joint Transmission) or joint reception (JR: Joint Reception).

  A plurality of small power base station apparatuses or small cells arranged in the vicinity may be clustered (clustered or grouped). The plurality of clustered low-power base station apparatuses may notify the same setting information. A clustered small cell region (coverage) may be referred to as a local area.

  In downlink transmission, the base station apparatus 1 may be referred to as a transmission point (TP). Further, in uplink transmission, the base station apparatus 1 may be referred to as a reception point (RP). Further, the downlink transmission point and the uplink reception point can be path loss reference points (Pathloss Reference Points, Reference Points) for downlink path loss measurement. Further, the reference point for path loss measurement may be set independently of the transmission point and the reception point.

  A small cell, a phantom cell, and a local area cell may be set as the third cell. Further, the small cell, the phantom cell, and the local area cell may be reset as the primary cell. Further, the small cell, the phantom cell, and the local area cell may be reset as a secondary cell. The small cell, phantom cell, and local area cell may be reconfigured as a serving cell. Further, the small cell, the phantom cell, and the local area cell may be included in the serving cell.

  The base station apparatus 1 capable of forming a small cell may perform intermittent reception (DRX: Discrete Reception) or intermittent transmission (DTX: Discrete Transmission) as necessary. Moreover, the base station apparatus 1 which can comprise a small cell may perform ON / OFF of the power supply of one part apparatus (for example, transmission part and a receiving part) intermittently or semi-statically.

  An independent identifier (ID: Identity, Identifier) may be set between the base station apparatus 1 constituting the macro cell and the base station apparatus 1 constituting the small cell. That is, the identifier of the macro cell and the small cell may be set independently. For example, when a cell specific reference signal (CRS) is transmitted from a macro cell and a small cell, the cell specific reference signal (SRS) may be scrambled with different identifiers even if the transmission frequency and the radio resource are the same. A cell-specific reference signal for a macro cell may be scrambled with a physical layer cell ID (PCI), and a cell-specific reference signal for a small cell may be scrambled with a virtual cell ID (VCI). The macro cell may be scrambled with a physical layer cell ID (PCI), and the small cell may be scrambled with a global cell ID (GCI). The macro cell may be scrambled with the first physical layer cell ID, and the small cell may be scrambled with the second physical layer cell ID. The macro cell may be scrambled with the first virtual cell ID, and the small cell may be scrambled with the second virtual cell ID. Here, the virtual cell ID may be an ID set in the physical channel / physical signal. The virtual cell ID may be an ID set independently of the physical layer cell ID. The virtual cell ID may be an ID used for scrambling a sequence used for a physical channel / physical signal.

  In addition, some physical channels / physical signals may not be transmitted in the component carrier corresponding to the serving cell or the small cell set as the small cell or the small cell. For example, a cell specific reference signal (CRS) and a physical downlink control channel (PDCCH) may not be transmitted. In addition, a new physical channel / physical signal may be transmitted in a component cell corresponding to a serving cell or a small cell set as a small cell or a small cell.

  In the first embodiment, different frame structure types (FDD (type 1) and TDD (type 2)) are applied to the primary cell and at least one secondary cell in the terminal device 2 that performs cell aggregation (carrier aggregation). If the terminal device 2 does not have a function (performance and capability) for simultaneous transmission / reception between bands supported by the primary cell and the secondary cell, the primary cell and the secondary cell do not perform transmission / reception simultaneously.

  FIG. 4 is a flowchart showing the procedure of the process 1 of the terminal device 2 according to the first embodiment of the present invention. When the terminal device 2 performs cell aggregation in a plurality of cells, the terminal device 2 determines whether or not a plurality of cells having different frame structure types are aggregated (step S401). When a plurality of cells having different frame structure types are aggregated (S401: YES), the terminal device 2 determines whether or not a plurality of cells having different frame structure types have a function of performing transmission / reception simultaneously ( Step S402). When the terminal device 2 has a function of simultaneously transmitting / receiving in a plurality of cells of different frame structure types (S402: YES), the terminal device 2 transmits / receives simultaneously in a plurality of cells of different frame structure types in the same subframe. (Step S403). When a plurality of cells having different frame structure types are not aggregated (S401: NO), that is, when a plurality of cells having the same frame structure type are aggregated, the process proceeds to processing 3. In addition, when a plurality of cells having different frame structure types do not have a function of simultaneously transmitting and receiving (S402: NO), the process proceeds to process 2.

  An example of process 2 is shown below.

  When a plurality of cells to which different frame structure types are applied are aggregated and there is no function (performance or capability) for simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, the terminal device 2 is a sub-cell of the primary cell. Depending on the type of frame, it is determined whether transmission / reception is performed simultaneously in the secondary cell of the same subframe.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, the subframe of the primary cell may be a downlink subframe. For example, the terminal device 2 does not transmit an uplink signal (which channel or signal including the uplink signal) in the secondary cell of the same subframe. At this time, the base station apparatus 1 does not expect an uplink signal to be transmitted from the terminal apparatus 2 in the subframe. That is, the base station apparatus 1 does not have to receive an uplink signal transmitted from the terminal apparatus 2 in the subframe.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, uplink transmission is required for the subframe of the primary cell. If it is an uplink subframe (a valid uplink subframe), the terminal apparatus 2 does not expect that a downlink signal can be received in the secondary cell of the same subframe. That is, in this case, the terminal apparatus 2 does not expect that a downlink signal is transmitted from the base station apparatus 1 (there is downlink transmission). Therefore, in this case, the terminal device 2 may not receive the downlink signal in the secondary cell. In this case, the base station apparatus 1 does not have to transmit a downlink signal to the terminal apparatus 2 in the secondary cell.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, uplink transmission is required for the subframe of the primary cell. If it is not an uplink subframe (invalid uplink subframe), the terminal apparatus 2 may receive a downlink signal in the secondary cell of the same subframe. In this case, the base station apparatus 1 may transmit a downlink signal to the terminal apparatus 2 in the secondary cell.

  Further, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal apparatus 2, cross-carrier scheduling in the primary cell (or secondary cell) is performed. If uplink transmission is requested for a subframe with a secondary cell, the terminal apparatus 2 does not expect that a downlink signal can be received in the primary cell of the same subframe. That is, in this case, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1. Therefore, in this case, the terminal device 2 may not receive the downlink signal.

  Further, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, multi-subframe scheduling in the primary cell (secondary cell) or If uplink transmission is requested for a subframe with a secondary cell by cross subframe scheduling, the terminal device 2 does not expect that a downlink signal can be received in the primary cell of the same subframe. That is, in this case, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1. Therefore, in this case, the terminal device 2 may not receive the downlink signal. In this case, the base station apparatus 1 does not have to transmit a downlink signal to the terminal apparatus 2 in the secondary cell.

  Further, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, multi-subframe scheduling in the primary cell (or secondary cell) Or if downlink transmission is shown with respect to the sub-frame of a secondary cell by cross sub-frame scheduling, the terminal device 2 will not expect that an uplink signal can be transmitted in the primary cell of the same sub-frame. That is, in this case, the terminal device 2 does not expect that uplink transmission is requested in the subframe. Therefore, in this case, the terminal device 2 does not need to transmit an uplink signal. For example, the transmission of P-SRS may be dropped even if it is the same subframe as the transmission subframe of P-SRS.

  Further, if a plurality of cells to which different frame structure types are applied are aggregated and there is no function of simultaneously transmitting and receiving between the plurality of cells aggregated in the terminal device 2, if the subframe of the primary cell is a special subframe The terminal device 2 does not expect that PDSCH / EPDCCH / PMCH / PRS can be received in the secondary cell of the same subframe. In this case, the terminal device 2 may not transmit the PUSCH / PUCCH / PRACH formats 1 to 3. In this case, the base station apparatus 1 does not expect the PUSCH / PUCCH / PRACH formats 1 to 3 to be transmitted from the terminal apparatus 2.

  Also, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of simultaneously transmitting and receiving between the plurality of cells aggregated in the terminal device 2, the downlink of the special subframe of the primary cell and the secondary cell If the subframes are the same subframe, the terminal device 2 does not expect that a downlink signal can be received in the OFDM symbol of the secondary cell that overlaps the guard period and the UpPTS in the subframe of the primary cell. In this case, the terminal device 2 may not receive the downlink signal. In this case, the terminal apparatus 2 may receive a downlink signal (for example, PDCCH) in the OFDM symbol of the secondary cell that does not overlap the guard period and the UpPTS in the subframe of the primary cell. In this case, the base station apparatus 1 may transmit the downlink signal in the OFDM symbol of the secondary cell that does not overlap the guard period and the UpPTS in the subframe of the primary cell.

  Further, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal apparatus 2, the uplink of the special subframe of the primary cell and the secondary cell If the subframes are the same subframe, the terminal apparatus 2 is expected to be able to transmit an uplink signal in the SC-FDMA symbol (OFDM symbol) of the secondary cell that overlaps the guard period and DwPTS in the subframe of the primary cell. do not do. In this case, the terminal device 2 may not transmit an uplink signal. Also, in this case, the terminal device 2 uses the uplink signal (for example, SRS or PRACH format 4 that can be arranged in the UpPTS) in the SC-FDMA symbol of the secondary cell that does not overlap with the guard period in the subframe of the primary cell and DwPTS. ) May be sent. Also, in this case, the base station apparatus 1 receives an uplink signal using the SC-FDMA symbol of the secondary cell that does not overlap with the guard period in the subframe of the primary cell and DwPTS.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, a subframe in which a certain cell is present among the plurality of cells However, when uplink transmission is requested, even if another cell is a downlink subframe, it is not expected that a downlink signal can be received in the downlink subframe. In other words, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1 in the same subframe of another cell. That is, in this case, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1. Therefore, in this case, the terminal device 2 may not receive the downlink signal. In this case, the base station apparatus 1 does not have to transmit a downlink signal to the terminal apparatus 2.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, and there is no function of performing uplink carrier aggregation, the primary cell If uplink transmission is requested for the subframe, the terminal apparatus 2 does not simultaneously transmit an uplink signal and receive a downlink signal in the secondary cell of the same subframe. In addition, if uplink transmission is requested for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), an uplink signal is transmitted in the primary cell of the same subframe. Transmission and downlink signal reception may not be performed. In this case, in the primary cell of the same subframe, the base station apparatus 1 does not need to receive the uplink signal and transmit the downlink signal.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, and there is no function of performing downlink carrier aggregation, the primary cell If uplink transmission is requested for a certain subframe, it is not expected that a downlink signal can be received in the secondary cell of the same subframe. Also, if uplink transmission is requested for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the downlink signal is transmitted in the primary cell of the same subframe. Do not expect to receive. That is, in this case, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1. Therefore, in this case, the terminal device 2 may not receive the downlink signal.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal apparatus 2, the subframe of the primary cell is a downlink. If it is a subframe, the terminal device 2 does not transmit an uplink signal in the secondary cell of the same subframe. In this case, the base station apparatus 1 does not expect an uplink signal to be transmitted from the terminal apparatus 2 in the secondary cell of the same subframe.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, the subframe of the primary cell is a special sub If it is a frame, the terminal device 2 does not expect that PDSCH / EPDCCH / PMCH / PRS can be received in the secondary cell of the same subframe. In this case, the terminal device 2 does not need to receive PDSCH / EPDCCH / PMCH / PRS. In this case, the terminal device 2 may not transmit the PUSCH / PUCCH / PRACH formats 1 to 3.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of simultaneously transmitting and receiving in the downlink between the plurality of cells aggregated in the terminal device 2, the subframe of the primary cell is the uplink. If it is a subframe, the terminal device 2 does not expect that a downlink signal can be received in the secondary cell of the same subframe. That is, in this case, the terminal device 2 does not have to receive a downlink signal.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated and there is no function of simultaneously transmitting and receiving in the downlink between the plurality of cells aggregated in the terminal device 2, the special subframe and the secondary of the primary cell If the uplink subframe of the cell is the same subframe, the terminal apparatus 2 transmits an uplink signal in the SC-FDMA symbol (OFDM symbol) of the secondary cell that overlaps the guard period and DwPTS in the subframe of the primary cell. Do not expect to be able to send. In this case, the terminal device 2 may not transmit an uplink signal. Further, in this case, an uplink signal (for example, SRS or PRACH format 4 that can be arranged in UpPTS) is transmitted in the SC-FDMA symbol of the secondary cell that does not overlap with the guard period in the subframe of the primary cell and DwPTS. Also good.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, and there is no function of performing simultaneous transmission / reception in the uplink of the secondary cell among the plurality of cells aggregated in the terminal device 2, the sub cell of the primary cell If the frame is a downlink subframe, the terminal apparatus 2 does not transmit an uplink signal in the secondary cell of the same subframe.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, and there is no function of performing simultaneous transmission / reception in the uplink of the secondary cell among the plurality of cells aggregated in the terminal device 2, the sub cell of the primary cell If the frame is a special subframe, the terminal device 2 does not expect that PDSCH / EPDCCH / PMCH / PRS can be received in the secondary cell of the same subframe. In this case, the terminal device 2 does not need to receive PDSCH / EPDCCH / PMCH / PRS. In this case, the terminal device 2 may not transmit the PUSCH / PUCCH / PRACH formats 1 to 3.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, and there is no function of simultaneously transmitting and receiving in the downlink of the secondary cell among the plurality of cells aggregated in the terminal device 2, the sub cell of the primary cell If the frame is an uplink subframe, the terminal apparatus 2 does not expect that a downlink signal can be received in the secondary cell of the same subframe. That is, in this case, the terminal device 2 does not have to receive a downlink signal.

  In addition, when a plurality of cells to which different frame structure types are applied are aggregated, and there is no function of simultaneously transmitting and receiving in the downlink of the secondary cell among the plurality of cells aggregated in the terminal device 2, the special of the primary cell If the uplink subframe of the subframe and the secondary cell are the same subframe, the terminal apparatus 2 uses the SC-FDMA symbol (OFDM symbol) of the secondary cell that overlaps the guard period and DwPTS in the subframe of the primary cell. Do not expect to be able to transmit uplink signals. In this case, the terminal device 2 may not transmit an uplink signal. Further, in this case, an uplink signal (for example, SRS or PRACH format 4 that can be arranged in UpPTS) is transmitted in the SC-FDMA symbol of the secondary cell that does not overlap with the guard period in the subframe of the primary cell and DwPTS. Also good.

  Here, a plurality of cells to which different frame structure types are aggregated means, for example, that a cell whose frame structure type is Type 1 (FDD) and a cell whose frame structure type is Type 2 (TDD) are aggregated. Including doing. In addition, a plurality of cells to which different frame structure types are applied are, for example, a plurality of cells having a frame structure type of type 1 (FDD) and a plurality of cells having a frame structure type of type 2 (TDD). Includes aggregating cells. That is, a plurality of cells to which different frame structure types are applied means that, for example, one or more cells whose frame structure type is Type 1 (FDD) and the frame structure type is Type 2 (TDD). Aggregating one or more cells. Note that the frame structure type is an example, and the same applies when type 3 or type 4 is defined.

  The terminal device 2 has a frame structure type for the primary cell of FDD, a frame structure type for at least one secondary cell of the secondary cells is TDD, and a plurality of different frame structure types aggregated in the terminal device 2. When there is no function of performing simultaneous transmission / reception between cells, the terminal device 2 does not transmit an uplink signal in an uplink subframe in a secondary cell in which TDD is set.

  The terminal device 2 has a frame structure type for the primary cell of FDD, a frame structure type for at least one secondary cell of the secondary cells is TDD, and a plurality of different frame structure types aggregated in the terminal device 2. If there is no function for simultaneous transmission / reception between cells, if uplink transmission is requested for a subframe in which a primary cell exists, the terminal apparatus 2 receives a downlink signal in the secondary cell of the same subframe. You don't have to. In other words, if uplink transmission is requested for a subframe in which a primary cell exists, the terminal apparatus 2 transmits a downlink signal from the base station apparatus 1 in the secondary cell of the same subframe. Do not expect.

  The terminal device 2 has a frame structure type for the primary cell of FDD, a frame structure type for at least one secondary cell of the secondary cells is TDD, and a plurality of different frame structure types aggregated in the terminal device 2. If there is no function for simultaneous transmission / reception between cells, if half duplex is supported for the FDD band of the primary cell, the terminal device 2 always transmits a downlink subframe, PDCCH, or CRS in the primary cell. Since the monitoring is not performed, when the primary cell is switched from the downlink subframe to the uplink subframe, the uplink signal may be transmitted in the secondary cell of the same subframe. Similarly, in this case, the terminal apparatus 2 does not expect that a downlink signal can be received in the secondary cell in the same subframe as the subframe for which uplink transmission is requested in the primary cell. The downlink signal may be received in the secondary cell of the same subframe as the subframe for which transmission is not requested.

  The terminal device 2 has a function of simultaneously transmitting and receiving between a plurality of cells of different frame structure types aggregated in the terminal device 2 in which the primary cell is FDD and at least one of the secondary cells is TDD. If there is no uplink transmission for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), there is no downlink in the primary cell of the same subframe. The link signal may not be received. In other words, when uplink transmission is requested for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the terminal apparatus 2 uses the primary cell of the same subframe. Therefore, it is not expected that a downlink signal is transmitted from the base station apparatus 1. Also, when downlink transmission is indicated for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the terminal device 2 can be used in the primary cell of the same subframe. The uplink signal may not be transmitted.

  Further, the terminal device 2 has a function of simultaneously transmitting and receiving between a plurality of cells of different frame structure types aggregated in the terminal device 2 in which the primary cell is TDD and at least one of the secondary cells is FDD. If there is no subframe, if the subframe of the primary cell is a downlink subframe, no uplink signal is transmitted in the same subframe of the secondary cell.

  Further, the terminal device 2 has a function of simultaneously transmitting and receiving between a plurality of cells of different frame structure types aggregated in the terminal device 2 in which the primary cell is TDD and at least one of the secondary cells is FDD. If there is not, if an uplink signal is scheduled in a subframe with a primary cell, it is not expected that a downlink signal is transmitted from the base station apparatus 1 in the same subframe of the secondary cell. The terminal device 2 may receive the downlink signal in the secondary cell of the same subframe if uplink transmission is not requested in the subframe of the primary cell.

  Further, the terminal device 2 has a function of simultaneously transmitting and receiving between a plurality of cells of different frame structure types aggregated in the terminal device 2 in which the primary cell is TDD and at least one of the secondary cells is FDD. If there is no uplink transmission for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the base station in the primary cell of the same subframe It is not expected that a downlink signal is transmitted from the station apparatus 1. In addition, if downlink transmission is indicated for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the terminal apparatus 2 in the same subframe of the primary cell Does not have to transmit an uplink signal.

  The terminal device 2 has a TDD UL / DL setting in which the primary cell is TDD and at least one secondary cell is different from the primary cell among the secondary cells, and the terminal device 2 has a plurality of different frame structure types aggregated in the terminal device 2. If there is no function for simultaneous transmission / reception between the cells, the terminal device 2 does not simultaneously transmit / receive in the primary cell and the secondary cell in the same subframe. Note that the TDD UL / DL configuration to be compared between a plurality of cells may be an uplink reference TDD UL / DL configuration. Further, the TDD UL / DL configuration to be compared between a plurality of cells may be a downlink reference TDD UL / DL configuration. Further, the TDD UL / DL setting to be compared between a plurality of cells may be the TDD UL / DL setting transmitted by SIB1. Also, the TDD UL / DL configuration to be compared between a plurality of cells may be a TDD UL / DL configuration transmitted by RRC signaling (may be a TDD UL / DL configuration signaled by RRC). In addition, one of TDD UL / DL settings to be compared between a plurality of cells may be transmitted by SIB1, and the other may be transmitted by RRC signaling.

  In the case of aggregation in a plurality of cells of the same frame structure type, if the frame structure type is FDD, transmission / reception may be performed between cells simultaneously. Also, when aggregation is performed in a plurality of cells of the same frame structure type, if the frame structure type is TDD, transmission / reception may be performed simultaneously depending on whether different TDD UL / DL settings are set between cells. You may decide whether it is good or not.

  Here, uplink transmission is required even if an uplink signal is scheduled by a grant for uplink transmission (dynamic scheduled grant, semi-persistent scheduling grant, random access response grant, uplink grant). Good. Further, the request for uplink transmission may be a request for PUSCH or SRS by an SRS request or CSI request included in the DCI format. Further, the request for uplink transmission may mean that an uplink signal is scheduled according to a parameter set by an upper layer. Here, an uplink subframe for which uplink transmission is requested is referred to as a valid uplink subframe. An uplink subframe for which uplink transmission is not requested is referred to as an invalid uplink subframe.

  The effective downlink subframe may be a subframe to which PDSCH resources are allocated by a downlink grant. In addition, the effective downlink subframe may be a downlink subframe in which a transmission interval or reception interval of downlink signals and a measurement interval are set by an upper layer. For example, a bitmap may be indicated by a CSI measurement subframe set. Further, the measurement subframe pattern may indicate the bit map. The downlink subframe to be measured may be indicated by the period and the subframe offset. In the downlink subframe in which the measurement interval is not indicated by the upper layer, the terminal apparatus 2 may not expect that a downlink signal is transmitted as an invalid downlink subframe.

FIG. 5 is a flowchart showing the procedure of the process 3 of the terminal device 2 according to the first embodiment of the present invention.
It is determined whether or not the frame structure type of the aggregated cells is TDD (step S501). If the frame structure type of the aggregated plurality of cells is TDD (S501: YES), it is determined whether or not different TDD UL / DL settings are set between the plurality of cells (S502). When different TDD UL / DL settings are set among a plurality of cells (S502: YES), the process proceeds to process 4. If different TDD UL / DL settings are not set between multiple cells (S502: NO), that is, if the same TDD UL / DL settings are set between multiple cells, multiple cells in the same subframe In step S503, even if transmission or reception is performed at the same time, transmission and reception are not performed at the same time. When the frame structure type of the aggregated cells is not TDD (S501: NO), for example, when the frame structure type of the aggregated cells is FDD, the process proceeds to processing 5.

  An example of process 4 is shown below.

  When a plurality of cells having different TDD UL / DL settings are aggregated and there is no function of performing simultaneous transmission / reception between the plurality of cells aggregated in the terminal device 2, the terminal device 2 may be in accordance with the type of subframe of the primary cell In the secondary cell of the same subframe, it is determined whether transmission / reception is performed simultaneously.

  In addition, when a plurality of cells having different TDD UL / DL settings are aggregated and there is no function of simultaneously transmitting / receiving between the plurality of cells aggregated in the terminal device 2, if the subframe of the primary cell is a downlink subframe, The terminal apparatus 2 does not transmit an uplink signal (which channel or signal including the uplink signal) in the secondary cell of the same subframe.

  In addition, if a plurality of cells with different TDD UL / DL settings are aggregated and there is no function of performing simultaneous transmission / reception among the plurality of cells aggregated in the terminal device 2, if the subframe of the primary cell is an uplink subframe The terminal device 2 does not expect that a downlink signal can be received in the secondary cell of the same subframe. That is, in this case, the terminal device 2 does not expect a downlink signal to be transmitted from the base station device 1. Therefore, in this case, the terminal device 2 may not receive the downlink signal in the secondary cell.

  In addition, when a plurality of cells having different TDD UL / DL settings are aggregated and there is no function of simultaneously transmitting and receiving between the plurality of cells aggregated in the terminal device 2, if the subframe of the primary cell is a special subframe, The terminal device 2 does not expect that PDSCH / EPDCCH / PMCH / PRS can be received in the secondary cell of the same subframe. In this case, the terminal device 2 may not transmit the PUSCH / PUCCH / PRACH formats 1 to 3.

  In addition, when a plurality of cells having different TDD UL / DL settings are aggregated and there is no function of performing simultaneous transmission / reception among the plurality of cells aggregated in the terminal device 2, the special subframe of the primary cell and the downlink sub of the secondary cell If the frames are the same subframe, the terminal device 2 does not expect that a downlink signal can be received in the OFDM symbol of the secondary cell that overlaps the guard period and the UpPTS in the subframe of the primary cell. In this case, the terminal device 2 may not receive the downlink signal. In this case, a downlink signal (for example, PDCCH) may be received in the OFDM symbol of the secondary cell that does not overlap the guard period and the UpPTS in the subframe of the primary cell.

  An example of process 5 is shown below.

  When the frame structure type of a plurality of cells is FDD, depending on whether uplink carrier aggregation and / or downlink carrier aggregation are applied in different FDD bands (duplex mode is FDD band) aggregated at the same time, The terminal device 2 determines whether transmission / reception can be performed simultaneously between a plurality of cells. When uplink carrier aggregation and / or downlink carrier aggregation are possible in different FDD bands aggregated at the same time, transmission and reception can be performed simultaneously in a plurality of cells in the same subframe. When half duplex is applied in different FDD bands, transmission / reception may not be performed simultaneously in a plurality of cells in the same subframe. Moreover, when the terminal device 2 has two or more wireless transmission units and / or wireless reception units (wireless transmission / reception units, RF units), transmission / reception may be performed simultaneously between a plurality of cells.

  The present embodiment may also be applied to different bands (E-UTRA Operating Band, E-UTRA Band, Band).

  Here, a band in which the duplex mode is TDD may be referred to as a TDD band, and a band in which the duplex mode is FDD may be referred to as an FDD band. Similarly, a cell (carrier) whose frame structure type is FDD (type 1) is called an FDD cell (FDD carrier), and a cell (carrier) whose frame structure type is TDD (type 2) is called a TDD cell (TDD carrier). There is also.

  The terminal device 2 that performs cell aggregation may perform transmission and reception simultaneously in a plurality of cells in different bands in the same subframe when there is a function of performing transmission and reception simultaneously between a plurality of cells in different bands. When there are a plurality of cells in which the duplex mode is TDD, transmission / reception may be performed simultaneously even if the TDD UL / DL settings of the plurality of cells (TDD cells) are different. In cell aggregation between different bands that support TDD, whether or not cell aggregation can be performed in a plurality of TDD cells may be determined depending on whether or not a function of simultaneously transmitting and receiving is provided.

  In addition, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of simultaneously transmitting and receiving between a plurality of cells in different bands, the terminal device 2 may determine whether the subframe of the primary cell is a downlink subframe. For example, uplink signals (physical channels and physical signals) are not transmitted in the secondary cell in the same subframe.

  In addition, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of simultaneously transmitting and receiving between a plurality of cells in different bands, the terminal device 2 uses the same subframe and the subframe of the primary cell is special. If the subframe of the secondary cell is a downlink subframe in a subframe, it is not expected that PDSCH / EPDCCH / PMCH / PRS can be received in the secondary cell.

  In addition, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of simultaneously transmitting and receiving between a plurality of cells in different bands, the terminal device 2 uses the same subframe and the subframe of the primary cell is special. If the subframe of the secondary cell is a downlink subframe in the subframe, it is not expected that another signal (downlink signal) can be received by the OFDM symbol of the secondary cell overlapping the guard period of the primary cell and the UpPTS.

  In addition, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of simultaneously transmitting and receiving between a plurality of cells in different bands, the terminal device 2 is required to perform uplink transmission of the subframe of the primary cell. If it is an uplink subframe, it is not expected that a downlink signal can be received in the same subframe of the secondary cell.

  Also, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of simultaneously transmitting and receiving between a plurality of cells in different bands, the terminal device 2 is required to perform uplink transmission of the subframe of the secondary cell. If it is an uplink subframe, it is not expected that a downlink signal can be received in the same subframe of the primary cell.

  That is, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of performing transmission / reception simultaneously between a plurality of cells in different bands, the terminal device 2 is present regardless of whether it is a primary cell or a secondary cell. If there is an uplink subframe for which uplink transmission is requested in a cell, it is not necessary to receive a downlink signal in the same subframe of another cell.

  In addition, when a plurality of cells in different bands are aggregated and the terminal device 2 does not have a function of performing transmission / reception simultaneously between a plurality of cells in different bands, the terminal device 2 may be a terminal regardless of whether it is a primary cell or a secondary cell. If there is no uplink subframe for which uplink transmission is requested in a cell supported by the apparatus 2, a downlink signal may be received in the same subframe.

  A plurality of cells in different bands are aggregated, the terminal device 2 does not have a function of simultaneously transmitting / receiving between a plurality of cells in different bands, and does not have a function of performing uplink carrier aggregation between bands supported by the terminal device 2 In this case, if uplink transmission is requested for a subframe in which a primary cell exists, the terminal apparatus 2 does not transmit an uplink signal and receive a downlink signal in a secondary cell in the same subframe. In addition, if uplink transmission is requested for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), an uplink signal is transmitted in the primary cell of the same subframe. Is not transmitted and downlink signals are not received.

  A plurality of cells in different bands are aggregated, the terminal device 2 does not have a function of simultaneously transmitting / receiving between a plurality of cells of different bands, and does not have a function of performing downlink carrier aggregation between bands supported by the terminal device 2 In this case, if uplink transmission is requested for a subframe in which a primary cell exists, the terminal device 2 may not receive a downlink signal in a secondary cell in the same subframe. In addition, if uplink transmission is requested for a subframe with a secondary cell by cross carrier scheduling (or cross subframe scheduling or multi-subframe scheduling), the terminal apparatus 2 may use the primary cell of the same subframe. In this case, it is not necessary to receive the downlink signal. In this case, the terminal device 2 does not expect that a downlink signal can be received. If downlink transmission is indicated for a subframe with a secondary cell by cross-carrier scheduling (or cross-subframe scheduling or multi-subframe scheduling), the terminal apparatus 2 may use the primary cell of the same subframe. In this case, the uplink signal need not be transmitted.

  In the present embodiment, the terminal device 2, when a subframe for measuring CRS and CSI-RS for each of a plurality of cells and a subframe for monitoring PDCCH and EPDCCH are set by higher layer signaling, If uplink transmission to the first cell is not requested, CRS or CSI-RS for the second cell may be measured to monitor PDCCH or EPDCCH. Moreover, in the subframe, when transmission of 2nd P-SRS with respect to a 1st cell arises, you may drop transmission of P-SRS. Also, in the subframe, when PUCCH transmission with CSI for the first cell occurs, priority is given to PUCCH transmission with CSI, and CRS and CSI-RS for the second cell may not be measured. , PDCCH and EPDCCH may not be monitored. In the subframe, when transmission of PUCCH with HARQ-ACK and / or SR occurs for the first cell, priority is given to transmission of PUCCH with HARQ-ACK and / or SR, and CRS or CSI for the second cell. -RS may not be measured and PDCCH and EPDCCH may not be monitored.

  In this embodiment, when the subframe for measuring CRS and CSI-RS and the subframe for monitoring PDCCH and EPDCCH are not set by higher layer signaling, the terminal device 2 uses the same subframe and the first cell In the uplink subframe, the second cell is a downlink subframe, and when P-SRS transmission occurs in the uplink subframe of the first cell, if the PDCCH cannot be detected in the second cell, The P-SRS may be transmitted in the subframe.

  In the present embodiment, when a plurality of cells in the TDD band and the FDD band are aggregated and there is no function of performing simultaneous transmission / reception in the aggregated cells, the terminal device 2 uses the FDD band (FDD band cell). May support only half-duplex (full duplex may not be supported in the FDD band). In this case, whether or not half duplex is supported for the FDD band applied to at least one of the aggregated cells is transmitted / received simultaneously in the aggregated TDD band cell and the FDD band cell. It may be associated with whether the function of performing is supported.

  In addition, when a plurality of cells in the TDD band and the FDD band are aggregated and there is a function of performing transmission and reception simultaneously in the aggregated plurality of cells, the FDD band depends on whether half duplex is supported in the FDD band. You may decide half duplex or full duplex. That is, in this case, whether to support half duplex in the FDD band may be indicated independently.

  The terminal device 2 for which cross carrier scheduling is set can perform uplink and downlink cross carrier scheduling. However, for the terminal device 2 that performs carrier aggregation using the TDD carrier and the FDD carrier, the communication efficiency is improved by setting the cross carrier scheduling for the uplink and the cross carrier scheduling for the downlink independently.

  FIG. 6 is a flowchart showing the procedure of the process 6 of the terminal device 2 according to the first embodiment of the present invention. The terminal apparatus 2 determines whether or not the function of the terminal apparatus 2 supports the function of performing cross-carrier scheduling for uplink and downlink independently (step S601). When the function of the terminal device 2 supports the function of performing cross-carrier scheduling for uplink and downlink independently (S601: YES), the terminal device 2 transmits the function information to the base station device 1. Based on the function information, the base station apparatus 1 independently sets the settings related to the cross carrier scheduling for the uplink and the downlink to the terminal apparatus 2 and transmits the setting information to the terminal apparatus 2. The terminal device 2 performs cross carrier scheduling for the uplink and the downlink based on the setting information. At this time, it is determined whether or not the cross-carrier scheduling for the uplink and the downlink is set to be performed only one (step S602). When it is set to perform only one of the cross-carrier scheduling for the uplink and the downlink (S602: YES), the terminal device 2 proceeds to processing 7. . When no cross-carrier scheduling for uplink and downlink is set, or when cross-carrier scheduling for uplink and downlink is set (S602: NO), the total number of blind decoding is The set (defined) value is not exceeded. When the function of performing the cross carrier scheduling for the uplink and the downlink is not supported independently (S601: NO), the terminal apparatus 2 proceeds to process 8.

  An example of processing 7 is shown below.

  Of the cross carrier scheduling for the uplink and the cross carrier scheduling for the downlink, by setting only the cross carrier scheduling for one of them, the DCI format (PDCCH) including CIF and the DCI format not including CIF are divided. . Depending on whether CIF is included, the number of DCI formats with different DCI format sizes increases, and the number of blind decoding increases accordingly.

  There is a function to perform cross-carrier scheduling independently for uplink and downlink, and when either one of the cross-carrier scheduling is set, scheduling is performed using a DCI format including CIF and a DCI format not including CIF. As it is done, the total number of blind decoding increases.

  When performing cross-carrier scheduling for a TDD cell and cross-carrier scheduling for an FDD cell, the DCI included in the DCI format differs between the DCI format for the TDD cell and the DCI format for the FDD cell even if the DCI format is the same. There is. Therefore, since the DCI format for the TDD cell and the DCI format for the FDD cell may not have the same DCI format size, the total number of blind decoding increases. The base station apparatus 1 may perform control so that the total number of blind decoding is not increased by setting the DCI format size of the DCI format for the TDD cell and the DCI format for the FDD cell to the same size.

  Also, by setting cross carrier scheduling independently for the uplink and the downlink, the uplink grant and the downlink grant are transmitted in different cells (component carriers). Therefore, blind decoding is performed independently even in DCI formats of the same format size transmitted from different cells, and the number of blind decoding increases accordingly. That is, when cross-carrier scheduling is performed on both uplink and downlink, communication control can be performed so that the total number of blind decoding does not increase. Further, when cross-carrier scheduling is not performed on both uplink and downlink, communication control can be performed so that the total number of blind decoding does not increase.

  When cross-carrier scheduling is set independently for uplink and downlink, the total number of blind decoding increases unless cross-carrier scheduling is set for either one. In this case, in order not to increase the reception processing delay, it is necessary not to increase the total number of blind decoding.

  For example, when only cross carrier scheduling for the downlink is performed, the transmission / reception control may be performed so that the downlink grant for each cell is always transmitted from only one cell. The one cell may be set by an upper layer. That is, notification may be made from the base station apparatus 1 to the terminal apparatus 2 using higher layer signaling. In this case, the number of blind decoding for USS in each cell may be reduced. In this case, the number of blind decoding may be reduced by reducing the number of PDCCH candidates for USS in each cell. In this case, the blind decoding number may be reduced by limiting the aggregation level for USS in each cell. The same processing may be performed when only cross-carrier scheduling for the uplink is performed. In this case, CIF may also be included for a grant (DCI format) that does not perform cross-carrier scheduling.

  When the total number of blind decoding exceeds a predetermined value by setting cross carrier scheduling independently for the uplink and the downlink, the brand decoding is limited so as not to exceed the predetermined value.

  An example of process 8 is shown below.

  When the terminal device 2 does not support the function of performing the cross-carrier scheduling for the uplink and the downlink independently or supports the common function of performing the cross-carrier scheduling for the uplink and the downlink. Since the DCI format for the uplink and the DCI format for the downlink always include CIF or does not include CIF, the total number of blind decoding does not exceed a predetermined value.

  FIG. 1 is a schematic block diagram showing the configuration of the base station apparatus 1 of the present invention. As illustrated, the base station apparatus 1 includes an upper layer processing unit 101, a control unit 103, a receiving unit 105, a transmitting unit 107, a channel measuring unit 109, and a transmission / reception antenna 111. The reception unit 105 includes a decoding unit 1051, a demodulation unit 1053, a demultiplexing unit 1055, and a wireless reception unit 1057. Further, the reception processing of the base station apparatus 1 is performed by the higher layer processing unit 101, the control unit 103, the receiving unit 105, and the transmission / reception antenna 111. The transmission unit 107 includes an encoding unit 1071, a modulation unit 1073, a multiplexing unit 1075, a radio transmission unit 1077, and a downlink reference signal generation unit 1079. Further, the transmission processing of the base station apparatus 1 is performed by the higher layer processing unit 101, the control unit 103, the transmission unit 107, and the transmission / reception antenna 111.

  The upper layer processing unit 101 includes a medium access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a radio resource control (RRC) : Radio Resource Control) layer processing.

  The upper layer processing unit 101 generates information acquired in each downlink channel or acquires the information from the upper node and outputs the information to the transmission unit 107. Further, the upper layer processing unit 101 allocates a radio resource in which the terminal apparatus 2 places a physical uplink shared channel (PUSCH), which is uplink data information, from among the uplink radio resources. Further, the upper layer processing unit 101 determines a radio resource in which a physical downlink shared channel (PDSCH), which is downlink data information, is arranged from downlink radio resources.

  The upper layer processing unit 101 generates downlink control information indicating the radio resource allocation and transmits the downlink control information to the terminal device 2 via the transmission unit 107.

  When allocating radio resources for arranging PUSCH, the upper layer processing unit 101 preferentially allocates radio resources with good channel quality based on the uplink channel measurement result input from the channel measurement unit 109. That is, the upper layer processing section 101 generates information regarding various downlink signal settings and information regarding various uplink signal settings for a certain terminal device or certain cell.

  Further, the upper layer processing section 101 may generate information on various downlink signal settings and information on various uplink signal settings for each cell. Further, the upper layer processing unit 101 may generate information regarding various downlink signal settings and information regarding various uplink signal settings for each terminal apparatus 2.

  Further, the upper layer processing unit 101 performs information on the first setting to information on the nth setting (n is a natural number) for a certain terminal device 2 or a certain cell, that is, specific to the terminal device and / or cell. May be generated and transmitted to the terminal device 2 via the transmission unit 107. For example, the information regarding the setting of the downlink signal and / or the uplink signal may include a parameter regarding resource allocation.

  Moreover, the information regarding the setting of a downlink signal and / or an uplink signal may include a parameter used for sequence calculation. These radio resources are classified as time frequency resources, subcarriers, resource elements (RE: Resource Element), resource element groups (REG: Resource Element Group), control channel elements (CCE: Control Channel Element), resource blocks (RB: (Resource Block), resource block group (RBG: Resource Block Group) and the like.

  These setting information and control information may be defined as information elements. Further, these setting information and control information may be defined as an RRC message. Moreover, you may transmit these setting information and control information to the terminal device 2 by system information. Moreover, you may transmit these setting information and control information to the terminal device 2 by exclusive signaling.

  The upper layer processing unit 101 sets at least one TDD UL / DL configuration (TDD UL / DL configuration (s), TDD config, tdd-Config, uplink-downlink configuration (s)) in the system information block type 1. To do. The TDD UL / DL setting may be defined as shown in FIG. The configuration of TDD may be indicated by setting an index. Further, a second TDD UL / DL setting may be set as a downlink reference. Further, a plurality of types of system information blocks may be prepared. For example, the system information block type 1 includes information elements related to TDD UL / DL settings.

  The system information block type 2 includes information elements related to radio resource control. Note that a parameter related to an information element may be included as an information element in a certain information element. For example, what is called a parameter in the physical layer may be defined as an information element in the upper layer.

  In the present invention, identity, identifier, and identification are referred to as ID (identifier, identification code, identification number). The ID (UEID) set uniquely for the terminal includes C-RNTI (Cell Radio Network Temporary Identifier), SPS C-RNTI (Semi-persistent Scheduling C-RNTI), Temporary C-RNTI, TPC-PUSCH RNTI, TPC- There is a PUCCH RNTI, a random value for contention resolution. These IDs are used in cell units. These IDs are set by the upper layer processing unit 101.

  The upper layer processing unit 101 sets various identifiers for the terminal device 2 and notifies the terminal device 2 via the transmission unit 107. For example, RNTI is set and notified to the terminal device 2. Also, an ID corresponding to the physical layer cell ID, virtual cell ID, or virtual cell ID is set and notified. For example, IDs corresponding to virtual cell IDs include IDs (PUSCH ID, PUCCH ID, scrambling initialization ID, reference signal ID (RSID), etc.) that can be set unique to the physical channel. The physical layer cell ID and the virtual cell ID may be used for generating a physical channel and physical signal series.

  Further, the upper layer processing unit 101 generates DCI transmitted using PDCCH or EPDCCH, and transmits the DCI to the terminal device 2 via the transmission unit 107.

  The upper layer processing unit 101 uses the uplink control information (UCI) notified from the terminal apparatus 2 through the physical uplink control channel (PUCCH) and the buffer notified from the terminal apparatus 2. Control information is generated to control the receiving unit 105 and the transmitting unit 107 based on the situation and various setting information (RRC message, system information, parameter, information element) of each terminal device 2 set by the upper layer processing unit 101 And output to the control unit 103. The UCI includes at least one of HARQ response information (HARQ-ACK, ACK / NACK / DTX), a scheduling request (SR: Scheduling Request), and channel state information (CSI: Channel State Information). The CSI includes at least one of CQI, PMI, and RI.

  Upper layer processing section 101 sets parameters relating to transmission power and transmission power of uplink signals (PRACH, PUCCH, PUSCH, UL DMRS, P-SRS, and A-SRS). Also, the higher layer processing section 101 sends parameters related to transmission power and transmission power of downlink signals (CRS, DL DMRS, CSI-RS, PDSCH, PDCCH / EPDCCH, etc.) to the terminal device 2 via the transmission section 107. Send. That is, the higher layer processing unit 101 transmits information on uplink and downlink power control to the terminal device 2 via the transmission unit 107. In other words, the upper layer processing unit 101 generates information related to transmission power control of the base station device 1 and the terminal device 2. For example, the upper layer processing unit 101 transmits a parameter related to the transmission power of the base station device 1 to the terminal device 2.

Further, the upper layer processing unit 101 transmits parameters used for setting the maximum transmission power P _{CMAX, c} and the total maximum output power P _CMAX of the terminal device 2 to the terminal device 2. Further, the upper layer processing unit 101 transmits information regarding transmission power control of various physical channels to the terminal device 2.

  The upper layer processing unit 101 also includes information indicating the amount of interference from the adjacent base station device, information indicating the amount of interference given to the adjacent base station device 1 notified from the adjacent base station device, and channel measurement. Depending on the quality of the channel input from the unit 109, the transmission power of the terminal device 2 is set so that the PUSCH and the like satisfy a predetermined channel quality, considering interference with the adjacent base station device 1, Information indicating these settings is transmitted to the terminal device 2 via the transmission unit 107.

Specifically, the upper layer processing unit 101 uses PUSCH and PUCCH as information set as information shared between the terminal devices 2 (information on shared parameters related to uplink power control) or parameters common between the terminal devices 2. Standard power ( _{PO_NOMINAL_PUSCH} , _{PO_NOMINAL_PUCCH} ), propagation loss compensation coefficient (attenuation coefficient) α, power offset for message 3, power offset specified for each PUCCH format, and the like are transmitted as system information. At this time, the power offset of PUCCH format 3 and the power offset of delta PUCCH format 1bCS may be added and notified. Further, information on these shared parameters may be notified by an RRC message.

In addition, the higher layer processing section 101, as information that can be set for each terminal device 2 (dedicated parameter information related to uplink power control), indicates whether the terminal device specific PUSCH power P _{0_UE_PUSCH} and delta MCS are valid. (DeltaMCS-Enabled), a parameter (accumulationEnabled) indicating whether or not accumulation is enabled, a terminal device specific PUCCH power P _{0_UE_PUCCH} , a P-SRS power offset P _{SRS_OFFSET} (0), and a filter coefficient are notified by an RRC message. At this time, the transmission diversity power offset in each PUCCH format, A-SRS power offset P _{SRS_OFFSET} (1) may be notified. Α described here is used to set the transmission power together with the path loss value, and is a coefficient representing the degree of compensation for the path loss, in other words, how much the transmission power is increased or decreased according to the path loss (that is, how much transmission power is transmitted). This is a coefficient (attenuation coefficient, transmission path loss compensation coefficient) that determines whether power is compensated). α usually takes a value from 0 to 1, if 0, power compensation according to the path loss is not performed, and if 1, the transmission power of the terminal device 2 is compensated so that the influence of the path loss does not occur in the base station device 1. To do. These pieces of information may be transmitted to the terminal device 2 as reset information. Note that these shared parameters and dedicated parameters may be set independently in the primary cell and the secondary cell or in a plurality of serving cells.

  Further, when the reception unit 105 receives the function information of the terminal device 2 from the terminal device 2, the upper layer processing unit 101 performs various settings based on the function information of the terminal device 2. For example, the uplink carrier frequency and the downlink carrier frequency are determined from the band (EUTRA Operating Band) supported by the terminal device 2 based on the function information of the terminal device 2. Further, based on the function information of the terminal device 2, it is determined whether or not to perform MIMO communication with the terminal device 2. Further, based on the function information of the terminal device 2, it is determined whether or not to perform carrier aggregation. Further, based on the function information of the terminal device 2, it is determined whether or not to perform carrier aggregation using component carriers of different frame structure types. That is, whether or not to set a secondary cell and various parameters used for the secondary cell are determined. The terminal device 2 is notified of the determined information. Information on the carrier frequency may be notified by an RRC message. That is, information on the carrier frequency may be notified by system information. Further, information regarding the carrier frequency may be notified by being included in the mobility control information. Moreover, the information regarding a carrier frequency may be notified from a higher layer as RRC information.

  If the upper layer processing unit 101 indicates that the function information transmitted from the terminal apparatus 2 supports a function for performing cross-carrier scheduling for the uplink, the setting related to cross-carrier scheduling for the uplink (CrossCarrierSchedulingConfig -UL) is set, and the setting information is transmitted to the terminal device 2 via the transmission unit 107 using higher layer signaling. Also, the information (schedulingCellId-UL) indicating the cell that signals the uplink grant (which cell signals the uplink grant) may be included in the setting related to cross carrier scheduling for the uplink. In addition, information (cif-Presence-UL) indicating whether or not CIF is included in the PDCCH / EPDCCH DCI format may be included in the setting related to cross carrier scheduling for the uplink.

  If the upper layer processing unit 101 indicates that the function information transmitted from the terminal apparatus 2 supports a function for performing cross carrier scheduling for the downlink, the setting related to cross carrier scheduling for the downlink (CrossCarrierSchedulingConfig -DL) is set, and the setting information is transmitted to the terminal device 2 via the transmission unit 107 using higher layer signaling. In addition, the configuration related to downlink cross-carrier scheduling may include information (schedulingCellId-DL) indicating a cell that signals downlink allocation (downlink grant) (which cell signals downlink allocation). . In addition, the setting related to downlink cross carrier scheduling may include information (pdsch-Start) indicating a start OFDM symbol corresponding to information indicating a cell. Moreover, the information (cif-Presence-DL) which shows whether CIF is contained in the PDCCH / EPDCCH DCI format may be contained in the setting regarding the cross carrier scheduling with respect to a downlink.

  Further, when setting a secondary cell for the terminal device 2, the upper layer processing unit 101 assigns a cell index other than a specific value (for example, an information bit corresponding to “0” or “0”) to the secondary cell. And the setting information is transmitted to the terminal device 2. When the secondary cell is set, the terminal device 2 regards the cell index of the primary cell as a specific value.

  Further, the higher layer processing section 101 may set a downlink signal / uplink signal transmission power or a parameter related to transmission power for each terminal device 2. Further, the higher layer processing section 101 may set parameters related to transmission power or transmission power of downlink / uplink signals that are common between the terminal devices 2. The upper layer processing section 101 uses the information regarding these parameters as information regarding uplink power control (parameter information regarding uplink power control) and / or information regarding downlink power control (parameter information regarding downlink power control). You may transmit to the apparatus 2. The parameter information related to uplink power control and the parameter information related to downlink power control include at least one parameter and are transmitted to the terminal device 2.

  Upper layer processing section 101 sets various IDs related to various physical channels / physical signals, and outputs information related to ID setting to receiving section 105 and transmitting section 107 via control section 103. For example, the higher layer processing unit 101 sets a value of RNTI (UEID) for scrambling the CRC included in the downlink control information format.

  In addition, the upper layer processing unit 101 includes C-RNTI (Cell Radio Network Temporary Identifier), Temporary C-RNTI, P-RNTI (Paging-RNTI), RA-RNTI (Random Access RNTI), SPS C-RNTI (Semi- Various identifier values such as Persistent Scheduling C-RNTI and SI-RNTI (System Information RNTI) may be set.

  Further, the upper layer processing unit 101 sets ID values such as a physical cell ID, a virtual cell ID, and a scramble initialization ID. Such setting information is output to each processing unit via the control unit 103. Moreover, these setting information may be transmitted to the terminal device 2 as an RRC message, system information, dedicated information unique to the terminal device, and information elements. Also, some RNTIs may be transmitted using MAC CE (Control Element).

  The control unit 103 generates a control signal for controlling the reception unit 105 and the transmission unit 107 based on the control information from the higher layer processing unit 101. Control unit 103 outputs the generated control signal to receiving unit 105 and transmitting unit 107 to control receiving unit 105 and transmitting unit 107.

  The receiving unit 105 separates, demodulates and decodes the received signal received from the terminal device 2 via the transmission / reception antenna 111 according to the control signal input from the control unit 103, and outputs the decoded information to the upper layer processing unit 101. . The radio reception unit 1057 converts an uplink signal received via the transmission / reception antenna 111 to an intermediate frequency (IF) (down-conversion), removes unnecessary frequency components, and appropriately maintains the signal level. As described above, the amplification level is controlled, and based on the in-phase and quadrature components of the received signal, quadrature demodulation is performed, and the quadrature demodulated analog signal is converted into a digital signal. Radio receiving section 1057 removes a portion corresponding to a guard interval (GI) from the converted digital signal. Radio receiving section 1057 performs Fast Fourier Transform (FFT) on the signal from which the guard interval is removed, extracts a frequency domain signal, and outputs the signal to demultiplexing section 1055.

  The demultiplexing unit 1055 demultiplexes the signal input from the radio reception unit 1057 into signals such as PUCCH, PUSCH, UL DMRS, and SRS. This separation is performed based on radio resource allocation information that is determined in advance by the base station device 1 and notified to each terminal device 2. Further, demultiplexing section 1055 compensates for the transmission paths of PUCCH and PUSCH from the estimated values of the transmission paths input from channel measurement section 109. Further, the demultiplexing unit 1055 outputs the separated UL DMRS and SRS to the channel measurement unit 109.

  The demodulator 1053 performs inverse discrete Fourier transform (IDFT) on the PUSCH to obtain modulation symbols, and performs binary phase shift keying (BPSK) on each of the modulation symbols of the PUCCH and the PUSCH. ) Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM), 64 Quadrature Amplitude Modulation (64QAM), etc. Alternatively, the base station apparatus 1 demodulates the received signal using a modulation scheme notified in advance by the downlink control information to each terminal apparatus 2.

  The decoding unit 1051 predecodes the encoded bits of the demodulated PUCCH and PUSCH according to a predetermined encoding method, or the base station apparatus 1 transmits an uplink grant (UL grant) to the terminal apparatus 2 in advance. Decoding is performed at the notified coding rate, and the decoded data information and uplink control information are output to the upper layer processing section 101.

  Channel measurement section 109 measures an estimated value of a transmission path, channel quality, and the like from uplink demodulation reference signals UL DMRS and SRS input from demultiplexing section 1055, and outputs them to demultiplexing section 1055 and higher layer processing section 101 To do. Further, channel measuring section 109 measures the received power and / or received quality of the first signal to the nth signal, and outputs them to demultiplexing section 1055 and higher layer processing section 101.

  The transmission unit 107 generates a downlink reference signal (downlink reference signal) based on the control signal input from the control unit 103, and receives the data information and downlink control information input from the higher layer processing unit 101. It encodes and modulates, multiplexes PDCCH (EPDCCH), PDSCH, and a downlink reference signal, and transmits a downlink signal to the terminal device 2 via the transmission / reception antenna 111.

  The encoding unit 1071 performs encoding such as turbo encoding, convolutional encoding, and block encoding on the downlink control information and data information input from the higher layer processing unit 101. Modulation section 1073 modulates the encoded bits with a modulation scheme such as QPSK, 16QAM, or 64QAM. The downlink reference signal generation unit 1079 is determined by a predetermined rule based on a cell identifier (Cell ID, Cell Identity, Cell Identifier, Cell Identification) for identifying the base station apparatus 1, and the terminal apparatus 2 is known. As a downlink reference signal. The multiplexing unit 1075 multiplexes each modulated channel and the generated downlink reference signal.

  The wireless transmission unit 1077 performs inverse fast Fourier transform (IFFT) on the multiplexed modulation symbols, performs modulation in the OFDM scheme, adds a guard interval to the OFDM symbol that has been OFDM-modulated, and performs baseband digital Generate a signal, convert the baseband digital signal to an analog signal, generate in-phase and quadrature components of the intermediate frequency from the analog signal, remove excess frequency components for the intermediate frequency band, and increase the signal of the intermediate frequency The signal is converted (up-converted) into a frequency signal, an extra frequency component is removed, the power is amplified, and output to the transmission / reception antenna 111 for transmission.

  FIG. 2 is a schematic block diagram illustrating a configuration of the terminal device 2 according to the present embodiment. As illustrated, the terminal device 2 includes an upper layer processing unit 201, a control unit 203, a reception unit 205, a transmission unit 207, a channel measurement unit 209, and a transmission / reception antenna 211. The reception unit 205 includes a decoding unit 2051, a demodulation unit 2053, a demultiplexing unit 2055, and a wireless reception unit 2057. The reception processing of the terminal station apparatus 2 is performed by the upper layer processing unit 201, the control unit 203, the receiving unit 205, and the transmission / reception antenna 211. The transmission unit 207 includes an encoding unit 2071, a modulation unit 2073, a multiplexing unit 2075, and a wireless transmission unit 2077. The transmission processing of the terminal device 2 is performed by the higher layer processing unit 201, the control unit 203, the transmission unit 207, and the transmission / reception antenna 211.

  The upper layer processing unit 201 outputs uplink data information generated by a user operation or the like to the transmission unit. The upper layer processing unit 201 includes a medium access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and radio resource control. (RRC: Radio Resource Control) layer processing is performed.

  The upper layer processing unit 201 manages various setting information of the own station. Further, the upper layer processing unit 201 generates information to be arranged in each uplink channel and outputs the information to the transmission unit 207. The higher layer processing unit 201 has various control information of its own station managed by the higher layer processing unit 201 in which the downlink control information notified from the base station apparatus 1 by PDCCH and the radio resource control information notified by PDSCH are set. Based on the control information, control information is generated to control the reception unit 205 and the transmission unit 207, and is output to the control unit 203. Further, the upper layer processing unit 201 sets various parameters (information element, RRC message) of each signal based on information on the n-th setting from information on the first setting notified from the base station apparatus 1. . In addition, the set information is generated and output to the transmission unit 207 via the control unit 203. Further, when establishing a connection with the base station apparatus 1, the upper layer processing unit 201 generates function information of the terminal apparatus 2 and outputs the function information to the transmission unit 207 via the control unit 203. To notify. The higher layer processing unit 201 may notify the base station apparatus 1 of the function information after the connection with the base station apparatus 1 is established.

  The function information may include information on RF parameters (RF-Parameters). The information related to the RF parameter may include information indicating a band supported by the terminal device 2 (1st SupportedBandCombination). The information related to the RF parameter may include information (SupportedBandCombinationExt) indicating a band that supports carrier aggregation and / or MIMO. The information on the RF parameter may include information indicating a band that supports a plurality of timing advance functions simultaneously performed in the terminal apparatus 2 and a function for performing transmission / reception between bands simultaneously (2nd SupportedBandCombination). Good. Each of these bands may be listed. Values (entries) indicated by a plurality of listed information may be common (may indicate the same).

  Whether or not half duplex is supported may be indicated for each band (bandE-UTRA, FreqBandIndicator, E-UTRA Operating Band) supported by the terminal device 2. Full duplex is supported in bands where half duplex is not supported.

  For the band supported by the terminal apparatus 2, it may be indicated whether carrier aggregation and / or MIMO is supported in the uplink.

  For the band supported by the terminal device 2, it may be indicated whether carrier aggregation and / or MIMO is supported in the downlink.

The information related to the RF parameter may include information indicating a band that supports TDD-FDD carrier aggregation. These bands may be listed.

The information regarding the RF parameter may include information indicating whether a function of simultaneously transmitting and receiving between bands that support TDD-FDD carrier aggregation is supported.

  Further, the information regarding the RF parameter may include information indicating whether transmission / reception can be performed simultaneously between bands of different duplex modes.

  The function information may include information on physical layer parameters (PhyLayerParameters). The information regarding the physical layer parameters may include information indicating whether or not a function of performing cross carrier scheduling is supported. Further, the information regarding the physical layer parameters may include information indicating whether or not a function of performing cross-carrier scheduling for the uplink (CrossCarrierScheduling-UL) is supported. Also, the information regarding the physical layer parameters may include information indicating whether or not a function of performing cross-carrier scheduling for the downlink (CrossCarrierScheduling-DL) is supported.

  For the terminal device 2 having a function of performing cross carrier scheduling for the uplink, the base station device 1 performs the setting related to the cross carrier scheduling for the uplink to the terminal device 2, thereby changing the uplink grant to the cross carrier. You may notify by scheduling. That is, the base station apparatus 1 may transmit the DCI format (uplink grant) regarding PUSCH scheduling for the second cell to the terminal apparatus 2 using the PDCCH of the first cell. The terminal device 2 can identify which cell is the DCI format by reading the CIF included in the DCI format accompanying the PDCCH transmitted by the PDCCH of the first cell.

  For the terminal device 2 having the function of performing the cross carrier scheduling for the downlink, the base station device 1 performs the setting related to the cross carrier scheduling for the downlink with respect to the terminal device 2 to thereby convert the downlink grant to the cross carrier. You may notify by scheduling. That is, the base station apparatus 1 may transmit the DCI format (downlink grant) related to PDSCH scheduling for the second cell to the terminal apparatus 2 using the PDCCH of the first cell. The terminal device 2 can identify which cell is the DCI format by reading the CIF included in the DCI format accompanying the PDCCH transmitted by the PDCCH of the first cell.

  Here, as a part of the capability (function, performance) of the terminal device 2 notified from the terminal device 2 to the base station device 1, the cross-carrier scheduling capability related to the downlink and the cross-carrier scheduling capability related to the uplink are respectively set. Can be included (independently). As an example, the parameter group of the physical layer of the information element (for example, UE-EUTRA-Capability) of the RRC message used when the capability of the terminal device 2 is notified from the terminal device 2 to the base station device 1, A field indicating whether to support cross-carrier scheduling for the downlink (first field) and a field indicating whether to support cross-carrier scheduling for the uplink (second field) may be included. The terminal device 2 that supports cross-carrier scheduling related to the downlink notifies the base station device 1 of the physical layer parameter group including the first field. The base station apparatus 1 that has received the notification can recognize that the terminal apparatus 2 is a terminal apparatus that supports cross-carrier scheduling related to the downlink. The terminal apparatus 2 that does not support downlink cross-carrier scheduling notifies the base station apparatus 1 without including the first field in the physical layer parameter group (omitting the value set in the first field). . The base station device 1 that has received the notification can recognize that the terminal device 2 is a terminal device that does not support cross-carrier scheduling related to the downlink. The terminal apparatus 2 that supports cross-carrier scheduling related to the uplink notifies the base station apparatus 1 of the physical layer parameter group including the second field. The base station device 1 that has received the notification can recognize that the terminal device 2 is a terminal device that supports cross-carrier scheduling related to uplink. The terminal apparatus 2 that does not support cross-carrier scheduling related to the uplink notifies the base station apparatus 1 without including the second field in the physical layer parameter group. The base station device 1 that has received the notification can recognize that the terminal device 2 is a terminal device that does not support cross-carrier scheduling related to the uplink. Thus, when a value set in a field is omitted, it is different from any value set in the field (for example, “1” indicating that the corresponding function is supported) (for example, corresponding) Does not support the function).

  Note that these functions may be supported only by a terminal device that supports cross-carrier scheduling in conventional carrier aggregation (FDD and FDD carrier aggregation and TDD and TDD carrier aggregation). That is, in order to set a value (for example, “1” indicating support) in the first field and / or the second field, a value (in the field indicating whether to support cross carrier scheduling in the conventional carrier aggregation ( For example, it may be necessary that “1” indicating support is set.

  As another example, the parameter group of the function group information (FGI: Feature Group Information) in the information element of the RRC message used when the capability of the terminal device 2 is notified from the terminal device 2 to the base station device 1 A field indicating whether to support cross-carrier scheduling for the link (first field) and a field indicating whether to support cross-carrier scheduling for the uplink (second field) are always included, The values set in these fields may indicate whether these functions are supported. For example, “1” may be set when these functions are supported, and “0” may be set when these functions are not supported. Alternatively, “0” may be set when these functions are supported, and “1” may be set when these functions are not supported.

  The base station apparatus 1 may notify the downlink grant by the cross carrier scheduling to the terminal apparatus 2 that has the function of performing the cross carrier scheduling for the downlink and does not have the function of performing the cross carrier scheduling for the uplink. However, the terminal device 2 may ignore the uplink grant even if the uplink grant is notified by cross carrier scheduling.

  The base station apparatus 1 may notify the uplink grant by the cross carrier scheduling to the terminal apparatus 2 that has the function of performing the cross carrier scheduling for the uplink and does not have the function of performing the cross carrier scheduling for the downlink. However, the terminal device 2 may ignore the downlink grant even if the downlink grant is notified by cross carrier scheduling.

  If there is an unsupported function among these functions included in the function information, the upper layer processing unit 201 does not set information indicating whether the function is supported in the function information. May be. The base station apparatus 1 considers that the terminal apparatus 2 does not support functions not set in the function information, and performs various settings. Note that the information indicating whether the function is supported may be information indicating that the function is supported.

  If there is an unsupported function among these function information, the upper layer processing unit 201 has a specific value (for example, “0”) or information (for example, “0”) indicating that the function is not supported. not supported ”,“ disable ”,“ FALSE ”, etc.) may be set, and the function information including the information may be notified to the base station apparatus 1.

  If there is a supported function among these function information, the upper layer processing unit 201 has a specific value (for example, “1”) or information (for example, “1”) indicating that the function is supported. supported "," enable "," TRUE ", etc.) may be set, and the function information including the information may be notified to the base station apparatus 1.

  The upper layer processing unit 201 supports information (simultaneousRx-Tx) indicating whether or not a function of simultaneously transmitting / receiving between simultaneously aggregateable bands is supported when there is no function of simultaneously transmitting / receiving between simultaneously aggregateable bands. Set a specific value or information that indicates not. Alternatively, information itself indicating whether or not a function for simultaneously transmitting and receiving between bands that can be aggregated is supported is not set in the function information.

  The upper layer processing unit 201 includes a sounding subframe (SRS subframe, SRS transmission subframe) that is a subframe for reserving a radio resource for transmitting the SRS broadcasted by the base station apparatus 1, and a sounding subframe. Information indicating the bandwidth of the radio resource reserved for transmitting the SRS, the subframe for transmitting the periodic SRS notified from the base station apparatus 1 to the terminal apparatus 2, the frequency band, and the CAZAC of the periodic SRS Information indicating the amount of cyclic shift used for the sequence, the frequency band for transmitting the aperiodic SRS notified to the terminal device 2 by the base station device 1, and the cyclic shift used for the CAZAC sequence of the aperiodic SRS And the information indicating the amount of data are acquired from the receiving unit 205.

  The upper layer processing unit 201 controls SRS transmission according to the information. Specifically, the upper layer processing unit 201 controls the transmission unit 207 to transmit the periodic SRS once or periodically according to the information related to the periodic SRS. When the upper layer processing unit 201 is requested to transmit an aperiodic SRS in the SRS request (SRS indicator) input from the receiving unit 205, the upper layer processing unit 201 determines the aperiodic SRS in advance according to information about the aperiodic SRS. Is transmitted only once (for example, once).

Upper layer processing section 201 controls transmission power of PRACH, PUCCH, PUSCH, periodic SRS, and aperiodic SRS based on information related to transmission power control of various uplink signals transmitted from base station apparatus 1. To do. Specifically, the upper layer processing unit 201 sets various uplink signal transmission powers based on various uplink power control information acquired from the reception unit 205. For example, the transmission power of SRS is P _{0_PUSCH} , α, power offset P _{SRS_OFFSET} (0) for periodic SRS (first power offset (pSRS-Offset)), power offset P _{SRS_OFFSET} (1 ) (Second power offset (pSRS-OffsetAp)) and the TPC command. Note that the upper layer processing unit 201 switches between the first power offset and the second power offset in accordance with P _{SRS_OFFSET} depending on whether it is a periodic SRS or an _aperiodic SRS.

  Further, when the third power offset is set for the periodic SRS and / or the aperiodic SRS, the upper layer processing unit 201 sets the transmission power based on the third power offset. Note that the value of the third power offset may be set in a wider range than the first power offset and the second power offset. The third power offset may be set for each of the periodic SRS and the aperiodic SRS. That is, the parameter information related to uplink power control is information elements and RRC messages including parameters related to control of transmission power of various uplink physical channels.

Further, the upper layer processing section 201 uses the maximum transmission power (the total transmission power of the first uplink reference signal and the transmission power of the physical uplink shared channel) set in the terminal device 2 in a certain serving cell and a certain subframe ( For example, if P _CMAX or P _{CMAX, c} ) is exceeded, the instruction information is output to the transmission unit 207 via the control unit 203 so as to transmit the physical uplink shared channel.

Further, the upper layer processing section 201 has a maximum transmission power (total transmission power (total transmission power of the first uplink reference signal and physical uplink control channel) set in the terminal device 2 in a certain serving cell and a certain subframe ( For example, if P _CMAX or P _{CMAX, c} ) is exceeded, the instruction information is output to the transmission unit 207 via the control unit 203 so as to transmit the physical uplink control channel.

  Further, the upper layer processing section 201 determines the maximum transmission power at which the sum of the transmission power of the second uplink reference signal and the transmission power of the physical uplink shared channel is set in the terminal device 2 in a certain serving cell and a certain subframe. When exceeding, the instruction information is output to the transmission unit 207 via the control unit 203 so as to transmit the physical uplink shared channel.

  Further, the upper layer processing section 201 determines the transmission power of the second uplink reference signal and the transmission power of the physical uplink control channel in a certain serving cell (for example, serving cell c) and a certain subframe (for example, subframe i). When the total exceeds the maximum transmission power set in the terminal apparatus 2, the instruction information is output to the transmission unit 207 via the control unit 203 so as to transmit the physical uplink control channel.

  Further, when transmission of a plurality of physical channels occurs at the same timing (for example, subframe), the upper layer processing unit 201 controls transmission power of various physical channels according to the priority of the various physical channels. It is also possible to control the transmission of various physical channels. Upper layer processing section 201 outputs the control information to transmission section 207 via control section 203.

  Further, when performing carrier aggregation using a plurality of serving cells or a plurality of component carriers corresponding to a plurality of serving cells, the upper layer processing unit 201 controls transmission power of various physical channels according to the priority of the physical channels. It is also possible to control transmission of various physical channels.

  Further, the upper layer processing unit 201 may perform transmission control of various physical channels transmitted from the cell according to the priority of the cell. Upper layer processing section 201 outputs the control information to transmission section 207 via control section 203.

  The higher layer processing unit 201 sends instruction information to the transmission unit 207 via the control unit 203 so as to generate an uplink reference signal based on the information related to the setting of the uplink reference signal notified from the base station apparatus 1. Output. That is, the reference signal control unit 2013 outputs information related to the setting of the uplink reference signal to the uplink reference signal generation unit 2079 via the control unit 203.

  The control unit 203 generates a control signal for controlling the reception unit 205 and the transmission unit 207 based on the control information from the higher layer processing unit 201. Control unit 203 outputs the generated control signal to reception unit 205 and transmission unit 207 to control reception unit 205 and transmission unit 207.

  The receiving unit 205 separates, demodulates, and decodes the received signal received from the base station apparatus 1 via the transmission / reception antenna 211 according to the control signal input from the control unit 203, and sends the decoded information to the upper layer processing unit 201. Output.

  The receiving unit 205 performs an appropriate reception process depending on whether or not information related to the first setting and / or information related to the second setting is received. For example, when either one of the information on the first setting or the information on the second setting is received, the first control information field is detected from the received downlink control information format, and the first When the information related to the setting and the information related to the second setting are received, the second control information field is detected from the received downlink control information format.

  The radio reception unit 2057 converts a downlink signal received via each reception antenna into an intermediate frequency (down-conversion), removes unnecessary frequency components, and an amplification level so that the signal level is appropriately maintained. , And quadrature demodulation based on the in-phase and quadrature components of the received signal, and converting the quadrature demodulated analog signal into a digital signal. The wireless reception unit 2057 removes a portion corresponding to the guard interval from the converted digital signal, performs fast Fourier transform on the signal from which the guard interval is removed, and extracts a frequency domain signal.

  The demultiplexing unit 2055 separates the extracted signal into a PDCCH, a PDSCH, and a downlink reference signal (DL-RS). This separation is performed based on radio resource allocation information notified by the downlink control information. Further, demultiplexing section 2055 compensates for the transmission paths of PDCCH and PDSCH from the estimated value of the transmission path input from channel measurement section 209. Also, the demultiplexing unit 2055 outputs the separated downlink reference signal to the channel measurement unit 209.

  Demodulation section 2053 demodulates the QPSK modulation scheme for PDCCH and outputs the result to decoding section 2051. Also, the demodulation unit 2053 demodulates the modulation scheme notified by the downlink control information such as QPSK, 16QAM, and 64QAM with respect to the PDSCH, and outputs it to the decoding unit 2051.

  The decoding unit 2051 tries to decode the PDCCH, and outputs the decoded downlink control information to the higher layer processing unit 201 when the decoding is successful. Also, the decoding unit 2051 performs decoding on the coding rate notified by the downlink control information, and outputs the decoded data information to the upper layer processing unit 201.

  When there is no function to perform cross-carrier scheduling independently for uplink and downlink, decoding section 2051 performs decoding processing (blind decoding) with DCI format 0 and DCI format 1A as one DCI format. Do.

  When the decoding unit 2051 has a function of performing cross-carrier scheduling independently for uplink and downlink, the decoding unit 2051 performs decoding processing with DCI format 0 and DCI format 1A as independent DCI formats.

  Decoding section 2051 does not expect that uplink carrier cross-carrier scheduling such as DCI format 0 or DCI format 4 will be performed when there is no function to perform cross-carrier scheduling for the uplink.

  Decoding section 2051 does not expect downlink carrier cross-carrier scheduling such as DCI format 1 or DCI format 1A to be performed when there is no function to perform cross-carrier scheduling for the downlink.

  The decoding unit 2051 may increase the total number of blind decoding when the setting related to any one of the cross carrier scheduling is performed for the uplink and the downlink.

  When only one of the settings related to cross carrier scheduling for the uplink or the downlink is set, the decoding unit 2051 performs a decoding process so as not to exceed the total number of blind decoding. For example, in USS, the number of PDCCH candidates is limited. In USS, the aggregation level for decoding is limited. Moreover, the cell (component carrier) which performs a decoding process is restrict | limited. For example, the decoding process is performed only on the primary cell. The base station apparatus 1 transmits the PDCCH using the limited number of PDCCH candidates, the aggregation level, and the cells so that blind decoding does not increase.

  The channel measurement unit 209 measures the downlink path loss from the downlink reference signal input from the demultiplexing unit 2055, and outputs the measured path loss to the higher layer processing unit 201. Further, channel measurement section 209 calculates an estimated value of the downlink transmission path from the downlink reference signal, and outputs it to demultiplexing section 2055. In addition, the channel measurement unit 209 receives the first signal and / or the second signal according to various information related to the measurement notified from the reference signal control unit 2013 via the control unit 203 and various information related to the measurement report. Measure power and receive quality. The result is output to the upper layer processing unit 201. When channel measurement unit 209 is instructed to perform channel evaluation of the first signal and / or second signal, channel measurement unit 209 may output the result of channel evaluation of each signal to higher layer processing unit 201. Good. Here, the first signal and the second signal are reference signals (pilot signal, pilot channel, reference signal), and the third signal and the fourth signal in addition to the first signal and the second signal. There may be. That is, the channel measurement unit 209 measures one or more signal channels. Further, the channel measurement unit 209 sets a signal for channel measurement according to the notified control information from the higher layer processing unit 201 via the control unit 203.

  Further, the channel measurement unit 209 causes the same sub of a cell (second cell) different from a certain cell due to the occurrence of an uplink subframe in which uplink transmission is requested in a certain cell (first cell). When CRS and CSI-RS cannot be measured in a frame, the measurement may be performed excluding subframes in which the average of measurement results (received power, reception quality, channel quality, etc.) in the second cell could not be measured. In other words, the channel measurement unit 209 may calculate an average value of measurement results (reception power, reception quality, channel quality, etc.) using only the received CRS and CSI-RS. The calculation result (indicator or information corresponding to the calculation result) may be transmitted to the base station apparatus 1 via the transmission unit 207.

  The transmission unit 207 generates an uplink demodulation reference signal (UL DMRS) and / or a sounding reference signal (SRS) based on the control signal (control information) input from the control unit 203, and from the higher layer processing unit 201 Encodes and modulates input data information, multiplexes PUCCH, PUSCH, and generated UL DMRS and / or SRS, adjusts transmission power of PUCCH, PUSCH, UL DMRS, and SRS, and transmits / receives via transmission / reception antenna 211 To the base station apparatus 1.

  Moreover, the transmission part 207 transmits to the base station apparatus 1 via the transmission / reception antenna 211, when the information regarding a measurement result is output from the upper layer process part 201. FIG.

  Further, when the channel state information that is the result of channel evaluation is output from the higher layer processing unit 201, the transmission unit 207 feeds back the channel state information to the base station apparatus 1. That is, the higher layer processing unit 201 generates channel state information (CSI, CQI, PMI, RI) based on the measurement result notified from the channel measurement unit 209, and feeds back to the base station apparatus 1 via the control unit 203. To do.

  When the receiving unit 205 detects a predetermined grant (or a predetermined downlink control information format), the transmitting unit 207 transmits an uplink signal corresponding to the predetermined grant from a subframe in which the grant is detected to a predetermined subframe. An uplink signal is transmitted in the first uplink subframe after the frame. For example, when a grant is detected in subframe i, an uplink signal can be transmitted in the first uplink subframe after subframe i + k.

  Further, when the transmission subframe of the uplink signal is subframe i, transmission section 207 sets the transmission power of the uplink signal based on the power control adjustment value obtained by the TPC command received in subframe i-k. To do. Here, the power control adjustment value f (i) (or g (i)) is set based on a correction value or an absolute value associated with a value set in the TPC command. When the accumulation is valid, the correction value associated with the value set in the TPC command is accumulated, and the accumulation result is applied as the power control adjustment value. If accumulation is not valid, the absolute value associated with the value set in a single TPC command is applied as the power control adjustment value.

  When the receiving unit 205 receives one of the information related to the first setting or the information related to the second setting, the transmitting unit 207 determines the transmission power based on the parameter related to the first uplink power control. When the receiving unit 205 receives the information related to the first setting and the information related to the second setting, the transmission power is set based on the parameter related to the second uplink power control, and the uplink signal is transmitted. To do.

  The encoding unit 2071 performs encoding such as turbo encoding, convolutional encoding, and block encoding on the uplink control information and data information input from the higher layer processing unit 201. The modulation unit 2073 modulates the coded bits input from the coding unit 2071 using a modulation scheme such as BPSK, QPSK, 16QAM, or 64QAM.

  The uplink reference signal generation unit 2079 generates an uplink reference signal based on information regarding the setting of the uplink reference signal. That is, the uplink reference signal generation unit 2079 has a cell identifier for identifying the base station apparatus 1, an uplink demodulation reference signal, a bandwidth for arranging the first uplink reference signal, the second uplink reference signal, and the like. Based on the above, the base station apparatus 1 obtains a known CAZAC sequence which is determined by a predetermined rule. Further, the uplink reference signal generation unit 2079 generates a CAZAC sequence of the uplink demodulation reference signal, the first uplink reference signal, and the second uplink reference signal that are generated based on the control signal input from the control unit 203. Giving a cyclic shift.

  The uplink reference signal generation unit 2079 may initialize the uplink demodulation reference signal and / or the sounding reference signal and the reference sequence of the uplink reference signal based on a predetermined parameter. The predetermined parameter may be the same parameter for each reference signal. The predetermined parameter may be a parameter set independently for each reference signal. That is, the uplink reference signal generation unit 2079 can initialize the reference sequence of each reference signal with the same parameters if there are no independently set parameters.

  The multiplexing unit 2075 rearranges the PUSCH modulation symbols in parallel on the basis of the control signal input from the control unit 203, and then performs discrete Fourier transform (DFT) to generate the PUCCH and PUSCH signals and the generated UL. Multiplex DMRS and SRS.

  The wireless transmission unit 2077 performs inverse fast Fourier transform on the multiplexed signal, performs SC-FDMA modulation, adds a guard interval to the SC-FDMA-modulated SC-FDMA symbol, and generates a baseband digital signal Convert the baseband digital signal to an analog signal, generate in-phase and quadrature components of the intermediate frequency from the analog signal, remove excess frequency components for the intermediate frequency band, Frequency) signal (up-conversion), remove excess frequency components, amplify the power, and output to the transmission / reception antenna 211 for transmission.

  In the embodiment of the present invention, the reception process may include a detection process. The reception process may include a demodulation process (Demodulation). The reception process may include a decoding process (Decode, Decoding).

  In the terminal device 2, the priority of the physical channel / physical signal to be transmitted may be set or defined in advance according to the type of the physical channel.

  In the embodiment of the present invention, the terminal device 2 may report the reception power measurement result based on CSI-RS or DRS (Discovery Reference Signal) to the base station device 1. The terminal device 2 may perform the report periodically. The terminal device 2 may perform the report when a certain condition is satisfied.

  In the embodiment of the present invention, when measuring the received power based on CSI-RS or DRS, the terminal device 2 may perform uplink signal transmission power control based on the received power. That is, the terminal device 2 may determine the downlink path loss based on the received power.

  Note that, in the embodiment of the present invention, the terminal device 2 is configured such that the total transmission power of various uplink signals including the transmission power of the first uplink reference signal and / or the second uplink reference signal is the terminal device 2. When the maximum transmission power set in is exceeded, the first uplink reference signal and / or the second uplink reference signal may not be transmitted.

  In the embodiment of the present invention, when a certain condition is satisfied, the base station apparatus 1 or the terminal apparatus 2 sets one as an uplink reference UL-DL setting and sets the other as a downlink reference UL-DL setting. May be. For example, the terminal device 2 may set the uplink reference UL-DL setting and the downlink reference UL-DL setting after receiving the information on the first setting and the information on the second setting. Note that the DCI format (for example, DCI format 0/4) related to the uplink may be transmitted in the downlink subframe set in the uplink reference UL-DL setting.

  Also, the uplink reference UL-DL setting and the downlink reference UL-DL setting may be set using the same table. However, when the indexes of the uplink reference UL-DL setting and the downlink reference UL-DL setting are set based on the same table, the uplink reference UL-DL setting and the downlink reference UL-DL setting are set with different indexes. It is preferred that That is, it is preferable that different subframe patterns are set for the uplink reference UL-DL setting and the downlink reference UL-DL setting.

  When multiple TDD UL / DL settings (UL / DL settings, UL-DL settings) are indicated for one serving cell (primary cell, secondary cell), either one is uplinked according to the conditions. The reference UL-DL setting may be set, and the other may be set as the downlink reference UL-DL setting. The uplink reference UL-DL configuration determines at least correspondence between a subframe in which a physical downlink control channel is arranged and a subframe in which a physical uplink shared channel corresponding to the physical downlink control channel is arranged. And may be different from the actual signal transmission direction (that is, uplink or downlink). The downlink reference UL-DL configuration is used to determine a correspondence between at least a subframe in which a physical downlink shared channel is arranged and a subframe in which HARQ-ACK corresponding to the physical downlink shared channel is transmitted. The actual signal transmission direction (that is, uplink or downlink) may be different. That is, the uplink reference UL-DL configuration specifies (selects and determines) the correspondence between the subframe n in which PDCCH / EPDCCH / PHICH is arranged and the subframe n + k in which PUSCH corresponding to the PDCCH / EPDCCH / PHICH is arranged. To be used). When one primary cell is configured, or when one primary cell and one secondary cell are configured, and the uplink reference UL-DL configuration for the primary cell and the uplink reference UL-DL configuration for the secondary cell are the same In each of the two serving cells, the corresponding uplink reference UL-DL configuration includes a subframe in which PDCCH / EPDCCH / PHICH is arranged and a subframe in which PUSCH corresponding to the PDCCH / EPDCCH / PHICH is arranged. Used to determine correspondence. The downlink reference UL-DL configuration is used to specify (select or determine) the correspondence between the subframe n in which the PDSCH is arranged and the subframe n + k in which the HARQ-ACK corresponding to the PDSCH is transmitted. . When one primary cell is configured, or when one primary cell and one secondary cell are configured, and the downlink reference UL-DL configuration for the primary cell and the downlink reference UL-DL configuration for the secondary cell are the same In each of the two serving cells, the corresponding downlink reference UL-DL configuration specifies the correspondence between the subframe n in which the PDSCH is arranged and the subframe n + k in which the HARQ-ACK corresponding to the PDSCH is transmitted ( Used to select and determine).

  In addition, the terminal device 2 has a TDD UL / DL setting for uplink transmission reference (first TDD UL / DL setting) and a TDD UL / DL setting for downlink transmission reference (second TDD UL / DL setting). Is set, and further, when information related to uplink transmission power control is set, when the same type of subframe is set in the first TDD UL / DL setting and the second TDD UL / DL setting, The uplink power control of the subframe is set based on the parameters related to the first uplink power control, and different types of subframes are set in the first TDD UL / DL setting and the second TDD UL / DL setting. If so, the uplink power of the subframe is set based on the second uplink power control parameter.

  The flexible subframe is an uplink subframe and is a subframe that is a downlink subframe. The flexible subframe is a downlink subframe and a subframe that is a special subframe. The flexible subframe is an uplink subframe and a subframe that is a special subframe. That is, the flexible subframe is a subframe that is a first subframe and a second subframe. For example, a subframe set as a flexible subframe is processed as a first subframe (for example, an uplink subframe) in the case of condition 1, and a second subframe (for example, in the case of condition 2). Downlink subframe).

  Note that the flexible subframe may be set based on the first setting and the second setting. For example, when a certain subframe i is set as an uplink subframe in the first setting and as a downlink subframe in the second setting, the subframe i is a flexible subframe. The flexible subframe may be set based on information indicating a subframe pattern of the flexible subframe.

  Also, a plurality of subframe sets are not two TDD UL / DL settings, but one TDD UL / DL setting and a flexible subframe pattern (downlink candidate subframe pattern or uplink candidate subframe pattern, additional subframe) May be set based on If the subframe index indicated by the flexible subframe pattern does not transmit an uplink signal in the subframe even if it is indicated as an uplink subframe in the TDD UL / DL setting, the terminal apparatus 2 It is possible to receive a link signal, and even if it is indicated as a downlink subframe in the TDD UL / DL setting, if an uplink signal is instructed in advance in that subframe, the uplink signal is transmitted. Can be sent. A specific subframe may be indicated as an uplink / downlink candidate subframe.

  If a certain condition is satisfied, the terminal device 2 may recognize either one as a subframe set for uplink and the other as a subframe set for downlink. Here, the subframe set for uplink is a set of subframes configured for PUSCH and PHICH transmission, and the downlink subframe set is configured for PDSCH and HARQ transmission. Set of subframes. Information indicating the relationship between the PUSCH and PHICH subframes and information indicating the relationship between the PDSCH and HARQ subframes may be set in the terminal device 2 in advance.

  In the embodiment of the present invention, a plurality of subframe sets may be set for one serving cell (primary cell, secondary cell, carrier frequency, transmission frequency, component carrier). There may be a cell in which a plurality of subframe sets are set and a cell in which a plurality of subframe sets are not set.

In the embodiment of the present invention, when two or more subframe sets are configured independently for one serving cell, the maximum transmission set for each terminal apparatus 2 for each subframe set. The power (P _CMAX , P _{CMAX, c} ) may be set. That is, the terminal device 2 may set a plurality of independent maximum transmission powers. That is, a plurality of maximum transmission powers (P _CMAX , P _{CMAX, c} ) may be set for one serving cell. Also, a plurality of maximum allowable output powers (P _{EMAX, c} ) may be set for one serving cell.

  Further, when the resource allocation of various uplink signals is the same, the base station apparatus 1 can detect various uplink signals depending on the difference in the signal sequence of each uplink signal. That is, the base station apparatus 1 can identify each uplink signal by the difference in the signal sequence of the received uplink signal. Moreover, the base station apparatus 1 can determine whether it is transmission addressed to its own station based on the difference in the signal sequence of the received uplink signal.

  Further, when the base station apparatus 1 is instructed to measure received power by CSI-RS or DRS, the terminal apparatus 2 may calculate a downlink path loss based on the measurement result and use it for uplink transmission power control. .

  Here, the received power measurement may be referred to as reference signal received power (RSRP) measurement or received signal power measurement. In addition, the reception quality measurement may be referred to as reference signal received quality (RSRQ) measurement or reception signal quality measurement.

  Further, CSI-RS or DRS resource allocation (resource allocation, mapping to resource elements, mapping to physical resources) may be frequency shifted. The frequency shift of CSI-RS or DRS may be determined based on the physical cell ID. Moreover, the frequency shift of CSI-RS or DRS may be determined based on virtual cell ID.

  For example, if no information is notified from the base station apparatus 1, the terminal apparatus 2 performs reception power measurement of the first downlink reference signal. Information indicating whether or not to measure the received power of the second downlink reference signal is notified from the base station apparatus 1 to the terminal apparatus 2. When the instruction information indicates that the received power measurement of the second downlink reference signal can be performed, the terminal device 2 performs the received power measurement of the second downlink reference signal. At this time, the terminal device 2 may measure the received power of the first downlink reference signal in parallel. When the terminal device 2 indicates that the instruction information cannot measure the received power of the second downlink reference signal, the terminal device 2 measures the received power of only the first downlink reference signal. Do. Further, the instruction information may include information instructing whether or not to measure the reception quality of the second downlink reference signal. Further, the third downlink reference signal may perform reception power measurement regardless of the instruction information.

  When two subframe sets are configured for one serving cell, if the second subframe set is a subframe pattern of a flexible subframe, a DCI format including a TPC command field for the flexible subframe is received. Information indicating a possible subframe pattern may be transmitted from the base station apparatus 1 to the terminal apparatus 2.

  A subframe pattern in which a TPC command applicable to an uplink subframe belonging to the first subframe set is transmitted and a TPC command applicable to an uplink subframe belonging to the second subframe set are Each subframe pattern to be transmitted may be set. Table management may be performed for association (linking) between an uplink subframe and a downlink subframe in which a DCI format including a TPC command for the uplink subframe is transmitted.

  Further, the RSRP measurement result may be independent in the subframe set. Measurement of RSRP by CRS received in the downlink subframe of the fixed subframe and measurement of RSRP by CRS received in the flexible subframe may be performed independently.

  In the embodiment of the present invention, when a plurality of subframe sets are set in one cell (serving cell, primary cell, secondary cell), these subframe sets are indicated by a bitmap (bit string). Also good. For example, a subframe set including fixed subframes may be indicated by a bit string. In addition, a subframe set including flexible subframes may be indicated by a bit string. In addition, these subframe sets may be set independently for FDD and TDD. For example, in FDD, a 40-bit bit string, in TDD, in a subframe setting (TDD UL / DL setting) 1 to 5, in a 20-bit bit string, in subframe setting 0, in a 70-bit bit string, in subframe setting 6, It may be indicated by a 60-bit bit string. The first bit or the leftmost bit of these bit strings corresponds to a subframe # 0 of a radio frame that satisfies a system frame number (SFN) mod x = 0. Of the bit string, a subframe in which “1” is set is used. For example, in the case of “1011000011” in a 10-bit bit string, subframes # 0, # 2, # 3, # 8, and # 9 are used.

  In the embodiment of the present invention, when a plurality of subframe sets are configured in one cell (serving cell, primary cell, secondary cell), the uplink subframe set is based on the uplink reference UL / DL configuration. The downlink subframe set may be set based on the downlink reference UL / DL setting.

  In the embodiment of the present invention, for a primary cell, a subframe pattern (measSubframePatternPCell) for primary cell measurement such as RSRP / RSRQ / radio link monitoring and a subframe pattern (csi-measSubframeSet1, csi-) for measuring CSI measSubframeSet2) and a subframe pattern (epdcch-SubframePattern) for monitoring EPDCCH are set.

  In the embodiment of the present invention, a subframe pattern (epdcch-SubframePattern) for monitoring the EPDCCH is set for the secondary cell.

  In the embodiment of the present invention, a subframe pattern (measSubframePatternNeigh) for measuring RSRP and RSRQ at a carrier frequency is set for an adjacent cell.

  In the embodiment of the present invention, the subframe pattern (csi-measSubframeSet1, csi-measSubframeSet2) for measuring CSI may be common to the primary cell and the secondary cell.

  In the embodiment of the present invention, the subframe pattern may be set independently for FDD and TDD. For example, in FDD, a 40-bit bit string, in TDD, in a subframe setting (TDD UL / DL setting) 1 to 5, in a 20-bit bit string, in subframe setting 0, in a 70-bit bit string, in subframe setting 6, It may be indicated by a 60-bit bit string. The first bit or the leftmost bit of these bit strings corresponds to a subframe # 0 of a radio frame that satisfies a system frame number (SFN) mod x = 0. Of the bit string, a subframe in which “1” is set is used. For example, in the case of “1011000011” in a 10-bit bit string, subframes # 0, # 2, # 3, # 8, and # 9 are used.

  In the embodiment of the present invention, the TDD UL / DL setting is transmitted (notified and transmitted) from the base station apparatus 1 to the terminal apparatus 2. Further, the TDD UL / DL setting may be notified by SIB1. Further, the TDD UL / DL configuration may be notified by higher layer signaling (RRC signaling, RRC message). For the terminal apparatus 2 that performs communication using a plurality of TDD UL / DL settings, the base station apparatus 1 may notify the TDD UL / DL settings by L1 signaling or L2 signaling.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings are set in one cell, one is used as an uplink reference and one is used as a downlink reference. The TDD UL / DL setting set as an uplink reference is used to perform processing related to uplink transmission / reception, such as PUSCH transmission timing, PHICH reception timing for PUSCH, and uplink grant reception timing. In addition, TDD UL / DL settings set as downlink reference include PDCCH / EPDCCH / PDSCH reception timing (monitoring), downlink grant reception timing, PUCCH transmission timing with HARQ-ACK, and so on. Used to perform processing related to reception.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for a primary cell, each subframe pattern in the primary cell is a TDD UL / DL setting notified by SIB1. May be determined based on Also, each subframe pattern in the primary cell may be determined based on TDD UL / DL configuration notified by higher layer signaling (RRC signaling, RRC message). In addition, each subframe pattern in the primary cell may be determined based on the TDD UL / DL configuration notified by L1 signaling (downlink grant, uplink grant, PDCCH / EPDCCH, DCI format). Also, each subframe pattern in the primary cell may be determined based on the TDD UL / DL configuration notified by L2 signaling (MAC CE). Also, each subframe pattern in the primary cell may be determined based on a TDD UL / DL configuration (uplink reference UL / DL configuration) used as an uplink reference. Further, each subframe pattern in the primary cell may be determined based on a TDD UL / DL configuration (downlink reference UL / DL configuration) used as a downlink reference. Also, each subframe pattern in the primary cell may be determined based on a common TDD UL / DL configuration. Also, each subframe pattern in the primary cell may be determined independently. For example, the subframe pattern for primary cell measurement is based on the TDD UL / DL configuration notified by SIB1, and the subframe pattern for monitoring EPDCCH is TDD notified by higher layer signaling (RRC signaling, RRC message). It may be determined based on the UL / DL setting. The subframe pattern for primary cell measurement may be determined based on the TDD UL / DL configuration notified by SIB1, and the subframe pattern for measuring CSI may be determined based on L1 signaling. Specifically, a subframe pattern for primary cell measurement is based on a bit string corresponding to subframe setting (TDD UL / DL setting) 0, and a subframe pattern for monitoring EPDCCH is subframe setting (TDD UL / Based on (DL setting) 3, the subframe pattern for measuring CSI may be based on subframe setting (TDD UL / DL setting) 6. Note that the value of the subframe setting (TDD UL / DL setting) is an example, and may be a different value.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for a secondary cell, the subframe pattern in the secondary cell is notified by the system information for the secondary cell TDD UL. It may be determined based on the / DL setting. Also, the subframe pattern in the secondary cell may be determined based on the TDD UL / DL configuration notified by higher layer signaling (RRC signaling, RRC message). Also, the subframe pattern in the secondary cell may be determined based on the TDD UL / DL configuration notified by L1 signaling (downlink grant, uplink grant, PDCCH / EPDCCH, DCI format). Further, the subframe pattern in the secondary cell may be determined based on the TDD UL / DL configuration notified by L2 signaling (MAC CE). Further, the subframe pattern in the secondary cell may be determined based on the TDD UL / DL setting (uplink reference UL / DL setting) set as the uplink reference. Further, the subframe pattern in the secondary cell may be determined based on the TDD UL / DL setting (downlink reference UL / DL setting) set as the downlink reference. In addition, when the sub-frame pattern for measuring CSI is set independently of the primary cell, the sub-frame pattern for measuring CSI in the secondary cell may be determined independently of the primary cell.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for the primary cell and the secondary cell, the subframe patterns in the primary cell and the secondary cell are the same. May be determined based on the TDD UL / DL settings of For example, the TDD UL / DL setting notified by SIB1 may be used, the TDD UL / DL setting notified by higher layer signaling may be used, or the TDD UL / DL notified by L1 / L2 signaling may be used. It may be a setting, may be a TDD UL / DL setting (uplink reference UL / DL setting) set as an uplink reference, or may be a TDD UL / DL setting (downlink) set as a downlink reference. Link reference UL / DL setting). Also, each subframe pattern in each of the primary cell and the secondary cell may be determined independently. For example, the subframe pattern in the primary cell is determined based on the TDD UL / DL configuration notified by SIB1, and the subframe pattern in the secondary cell is determined based on the TDD UL / DL configuration notified by L1 / L2 signaling. Also good. Further, the subframe pattern in the primary cell may be based on the TDD UL / DL setting set as the uplink reference, and the subframe pattern in the secondary cell may be based on the TDD UL / DL setting set as the downlink reference. .

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for each of the primary cell and the secondary cell, the uplink reference UL / DL setting of the primary cell is SIB1 ( Alternatively, it may be notified by system information other than SIB1). Further, the uplink reference UL / DL configuration of the primary cell may be notified by higher layer signaling (RRC signaling, RRC message). Further, the uplink reference UL / DL configuration of the primary cell may be notified by common / dedicated higher layer signaling (RRC signaling, RRC message) between the terminal devices. The uplink reference UL / DL configuration of the primary cell may be notified by L1 / L2 signaling. The downlink reference UL / DL configuration of the primary cell may be notified by the same method as shown in the uplink reference UL / DL configuration of the primary cell. Further, the uplink reference UL / DL setting and the downlink reference UL / DL setting of the primary cell may be set as independent parameters.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for each of the primary cell and the secondary cell, the uplink reference UL / DL setting of the secondary cell is the system information. May be notified by higher layer signaling (RRC signaling, RRC message) corresponding to. Further, the uplink reference UL / DL configuration of the secondary cell may be notified by common / dedicated higher layer signaling (RRC signaling, RRC message) between terminal devices, which does not correspond to system information. The uplink reference UL / DL configuration of the secondary cell may be notified by L1 / L2 signaling. The downlink reference UL / DL configuration of the secondary cell may be notified by the same method as shown in the uplink reference UL / DL configuration of the secondary cell. Also, the uplink reference UL / DL setting and the downlink reference UL / DL setting of the secondary cell may be set as independent parameters.

  In the embodiment of the present invention, the downlink reference UL / DL configuration (TDD UL / DL configuration) for the serving cell is determined based on the TDD UL / DL configuration of the primary cell and the TDD UL / DL configuration of the secondary cell.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are respectively set for the primary cell and the secondary cell, the downlink reference UL / DL setting for the serving cell The TDD UL / DL setting notified by SIB1 may be used, and the secondary cell may be determined as the TDD UL / DL setting notified by higher layer signaling. The downlink reference UL / DL setting for the serving cell is the TDD UL / DL setting notified by the SIB1 in the UL / DL setting of the primary cell, and the TDD UL / DL setting notified by the L1 signaling of the UL / DL setting of the secondary cell. As may be determined. Also, the downlink reference UL / DL setting for the serving cell is determined with the UL / DL setting of the primary cell as the downlink reference UL / DL setting and the UL / DL setting of the secondary cell as the downlink reference UL / DL setting. Also good. Also, the downlink reference UL / DL setting for the serving cell is determined by setting the UL / DL setting of the primary cell as the downlink reference UL / DL setting and the UL / DL setting of the secondary cell as the uplink reference TDD UL / DL setting. May be. Also, the downlink reference UL / DL setting for the serving cell is determined by setting the UL / DL setting of the primary cell as the uplink reference TDD UL / DL setting and the UL / DL setting of the secondary cell as the downlink reference TDD UL / DL setting. May be. The UL / DL setting of the primary cell and the secondary cell is an example, and the notified TDD UL / DL setting may be used depending on other conditions.

  In the embodiment of the present invention, the uplink reference UL / DL configuration (TDD UL / DL configuration) for the serving cell is determined based on the TDD UL / DL configuration of one serving cell and the TDD UL / DL configuration of another serving cell.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for each of a plurality of serving cells, an uplink reference UL / DL setting for the serving cell is defined as SIB1. The notified TDD UL / DL setting may be used, and other serving cells may be determined as the TDD UL / DL setting notified by higher layer signaling. Also, the uplink reference UL / DL setting for the serving cell is the TDD UL / DL setting notified by SIB1 of the UL / DL setting of a certain serving cell, and the TDD UL notified of the UL / DL setting of other serving cells by L1 signaling. / DL setting may be determined. Also, the uplink reference UL / DL setting for the serving cell is determined by setting the UL / DL setting of a certain serving cell as an uplink reference UL / DL setting and the UL / DL setting of another serving cell as an uplink reference UL / DL setting. May be. Also, the uplink reference UL / DL setting for the serving cell is determined by setting the UL / DL setting of a certain serving cell as an uplink reference UL / DL setting and the UL / DL setting of another serving cell as a downlink reference UL / DL setting. May be. Moreover, the TDD UL / DL setting in a plurality of serving cells is an example, and may be a TDD UL / DL setting set under other conditions.

In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for a plurality of serving cells (primary cell and secondary cell) and cross-carrier scheduling is performed, The downlink transmission / reception process is performed based on the UL / DL setting for the serving cell. Further, uplink transmission / reception processing in the primary cell is performed based on the uplink reference UL / DL setting for the serving cell. In this case, if the downlink grant for the secondary cell is detected in the primary cell, the downlink reception (PDSCH reception) of the secondary cell is performed based on the downlink reference UL / DL setting for the serving cell. Moreover, HARQ-ACK with respect to the downlink reception of a secondary cell is transmitted by PUCCH of a primary cell. In that case, transmission of PUCCH is performed based on the downlink reference UL / DL setting with respect to a serving cell. In this case, if the uplink grant for the secondary cell is detected in the primary cell, the uplink transmission (for example, PUSCH transmission) of the secondary cell may be performed based on the uplink reference UL / DL setting for the serving cell. Good. The PHICH for the uplink transmission of the secondary cell is transmitted in the primary cell. At this time, the transmission of PHICH is performed based on the uplink reference UL / DL setting for the serving cell. That is, in this case, the terminal apparatus 2 and the base station apparatus 1 perform uplink / downlink transmission / reception based on the uplink reference UL / DL setting and the downlink reference UL / DL setting. Also, in this case, for PUSCH transmission scheduled for the serving cell c in the subframe n (for serving cell c or a cell different from the serving cell c), the terminal device 2 is determined by the PHICH resource of the serving cell c in the subframe n + k _PHICH. The k _PHICH is determined based on the uplink reference UL / DL configuration for the serving cell. In this case, if the base station apparatus 1 receives the PUSCH scheduled for the serving cell c in the subframe n (for the serving cell c or a cell different from the serving cell c), the base station apparatus 1 uses the PHICH resource of the serving cell c in the subframe n + k _PHICH. , HARQ-ACK for PUSCH is transmitted.

  In the embodiment of the present invention, when a plurality of TDD UL / DL settings (UL / DL settings) are set for a neighboring cell, the subframe pattern in the neighboring cell is TDD UL notified in the system information for the neighboring cell. It may be determined based on the / DL setting. Further, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL configuration notified by higher layer signaling (RRC signaling, RRC message). Also, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL configuration notified by common / dedicated higher layer signaling (RRC signaling, RRC message) between the terminal devices. Further, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL configuration notified by L1 signaling (downlink grant, uplink grant, PDCCH / EPDCCH, DCI format). Further, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL configuration notified by L2 signaling (MAC CE). Also, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL setting (uplink reference UL / DL setting) set as the uplink reference. Further, the subframe pattern in the adjacent cell may be determined based on the TDD UL / DL setting (downlink reference UL / DL setting) set as the downlink reference.

  In the embodiment of the present invention, resource elements and resource blocks are used as mapping units for various uplink signals and downlink signals, and symbols, subframes, and radio frames are used as transmission units in the time direction. This is not a limitation. The same effect can be obtained even if a region and a time unit composed of an arbitrary frequency and time are used instead. In the embodiment of the present invention, a case where demodulation is performed using a precoded RS is described, and a port equivalent to the MIMO layer is described as a port corresponding to the precoded RS. However, it is not limited to this. In addition, the same effect can be obtained by applying the present invention to ports corresponding to different reference signals. For example, Unprecoded (Nonprecoded) RS is used instead of Precoded RS, and a port equivalent to the output end after precoding processing or a port equivalent to a physical antenna (or a combination of physical antennas) can be used as a port. .

  In the embodiment of the present invention, when only DCI format 3 / 3A is received in a certain downlink subframe, the correction value corresponding to the value set in the TPC command field included in DCI format 3 / 3A (Or absolute value) is applied to the power control adjustment value for the transmission power of the PUSCH transmitted in a specific subframe set, regardless of which subframe set the downlink subframe belongs to. When only the DCI format 3 / 3A is received in a certain downlink subframe, the accumulation of the TPC command included in the DCI format 3 / 3A is the power used for the transmission power for the PUSCH transmitted in the specific subframe set. It may be applied to the control adjustment value. The specific subframe set may be a fixed subframe set, a flexible subframe set, or an arbitrary subframe set.

  In the embodiment of the present invention, parameters related to uplink power control are parameters used for transmission power control of uplink physical channels / physical signals (PUSCH, PUCCH, PRACH, SRS, DMRS, etc.) Parameters used for transmission power control include information on switching or (re) setting of various parameters used for setting transmission power of various uplink physical channels. Parameters related to downlink transmission power control are downlink physical channels / physical signals (CRS, UERS (DL DMRS), CSI-RS, PDSCH, PDCCH / EPDCCH, PBCH, PSS / SSS, PMCH, PRS, etc.). It is a parameter used for transmission power control, and the parameter used for transmission power control includes information on switching or (re) setting of various parameters used for setting transmission power of various downlink physical channels. It is out.

  In the embodiment of the present invention, the base station apparatus 1 may be configured to set a plurality of virtual cell IDs for one terminal apparatus 2. For example, a network including the base station apparatus 1 and at least one base station apparatus 1 may be configured to set a virtual cell ID independently for each physical channel / physical signal. A plurality of virtual cell IDs may be set for one physical channel / physical signal. That is, the virtual cell ID may be set for each physical channel / physical signal setting. Also, the virtual cell ID may be shared by a plurality of physical channels / physical signals.

  In the description of the embodiment of the present invention, for example, setting power includes setting a value of power, and setting power includes setting a value for a parameter related to power, and calculates power. Doing includes calculating a power value, measuring the power includes measuring the power value, and reporting the power includes reporting the power value. Thus, the expression “power” includes the meaning of the value of power as appropriate.

  In the description of the embodiment of the present invention, not performing transmission includes not performing transmission processing. Moreover, not performing transmission includes not performing signal generation for transmission. Also, not transmitting includes generating up to a signal (or information) and not transmitting a signal (or information). Also, not receiving includes not receiving processing. Further, not receiving includes not performing detection processing. Further, not receiving includes not performing decoding / demodulation processing.

  In the description of the embodiment of the present invention, for example, calculating the path loss includes calculating the value of the path loss. Thus, the expression “path loss” includes the meaning of the value of path loss as appropriate.

  In the description of the embodiment of the present invention, setting various parameters includes setting various parameter values. Thus, the expression “various parameters” includes the meaning of various parameter values as appropriate.

  The program that operates in the base station device 1 and the terminal device 2 related to the present invention is a program (a program that causes a computer to function) that controls the CPU and the like so as to realize the functions of the above-described embodiments related to the present invention. Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary. As a recording medium for storing the program, a semiconductor medium (for example, ROM, nonvolatile memory card, etc.), an optical recording medium (for example, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (for example, magnetic tape, Any of a flexible disk etc. may be sufficient. In addition, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also based on the instructions of the program, the processing is performed in cooperation with the operating system or other application programs. The functions of the invention may be realized.

  In the case of distribution in the market, the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet. In this case, the storage device of the server computer is also included in the present invention. Moreover, you may implement | achieve part or all of the base station apparatus 1 and the terminal device 2 in embodiment mentioned above as LSI which is typically an integrated circuit. Each functional block of the base station apparatus 1 and the terminal apparatus 2 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. It is. Moreover, it is the element described in embodiment of this invention, and the structure which substituted the element which has the same effect is also contained.

  In addition, this invention is not limited to the above-mentioned embodiment. The terminal device of the present invention is not limited to application to a mobile station, but is a stationary or non-movable electronic device installed indoors or outdoors, such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning Needless to say, it can be applied to equipment, office equipment, vending machines, and other daily equipment. Further, the present invention is suitable for use in a radio base station apparatus, a radio terminal apparatus, a radio communication system, and a radio communication method.

DESCRIPTION OF SYMBOLS 1 Base station apparatus 2 Terminal apparatus 101 Upper layer process part 103 Control part 105 Reception part 107 Transmission part 109 Channel measurement part 111 Transmission / reception antenna 1051 Decoding part 1053 Demodulation part 1055 Demultiplexing part 1057 Radio reception part 1071 Encoding part 1073 Modulation part 1075 Multiplexer 1077 Radio transmitter 1079 Downlink reference signal generator 201 Upper layer processor 203 Controller 205 Receiver 207 Transmitter 209 Channel measurement unit 211 Transmit / receive antenna 2051 Decoder 2053 Demodulator 2055 Demultiplexer 2057 Radio receiver 2071 Encoding unit 2073 Modulating unit 2075 Multiplexing unit 2077 Radio transmitting unit 2079 Uplink reference signal generating unit

Claims (4)

A terminal device that communicates with a base station device,
  If there is a function to perform cross-carrier scheduling independently for uplink and downlink,
  Transmitting information indicating whether or not a function of performing cross-carrier scheduling for uplink is supported to the base station apparatus;
  Information indicating whether the function of performing cross-carrier scheduling for the downlink is supported is transmitted to the base station apparatus
  A terminal device characterized by that.   A base station device that communicates with a terminal device,
  If the function information transmitted from the terminal apparatus indicates that a function of independently performing cross-carrier scheduling for uplink and downlink is supported, the uplink and downlink for the terminal apparatus are supported. A base station apparatus characterized in that settings related to cross-carrier scheduling are independently set, and setting information is transmitted to a terminal apparatus. A communication method of a terminal device that communicates with a base station device,
  If there is a function to perform cross-carrier scheduling independently for uplink and downlink,
  Setting whether or not to support a function of performing cross-carrier scheduling for uplink in function information;
  Setting in the function information whether or not it supports a function of performing cross-carrier scheduling for downlink;
  Transmitting the function information to the base station apparatus.
  A communication method characterized by the above.   A communication method of a base station device that communicates with a terminal device,
  Receiving function information transmitted from the terminal device;
  The function information includes a function of performing cross-carrier scheduling for the uplink.
If it is shown that it supports, the step of performing the setting regarding cross carrier scheduling for the uplink,
  If the function information indicates that it supports a function of performing cross-carrier scheduling for the downlink, performing a setting for cross-carrier scheduling for the downlink;
  Transmitting the setting related to the cross carrier scheduling for the uplink and / or the setting related to the cross carrier scheduling for the downlink to the terminal apparatus using higher layer signaling.
  A communication method characterized by the above.