WO2010073477A1

WO2010073477A1 - System for mobile communications, base station device, mobile station device, and method of mobile communications

Info

Publication number: WO2010073477A1
Application number: PCT/JP2009/006166
Authority: WO
Inventors: 相羽立志; 山田昇平; 鈴木翔一
Original assignee: シャープ株式会社
Priority date: 2008-12-22
Filing date: 2009-11-17
Publication date: 2010-07-01
Also published as: JPWO2010073477A1

Abstract

Disclosed is a system for mobile communications, wherein a base station device and a mobile station device aggregate a plurality of component carriers and communicate, the base station device uses a physical downstream link shared channel to transmit a downstream link transport block to the mobile station device, and transmits to the mobile station device an upstream link transmission permission signal, which includes an information that denotes a quantity of physical downstream link shared channels that are allocated upon a common subframe, and the mobile station device transmits to the base station device an information that denotes a HARQ ACK/NACK corresponding to the downstream link transport block according to the information that denotes the quantity of physical downstream link shared channels.

Description

Mobile communication system, base station apparatus, mobile station apparatus, and mobile communication method

The present invention relates to a mobile communication system and a mobile communication method including a base station device and a mobile station device.
This application claims priority based on Japanese Patent Application No. 2008-325136 filed in Japan on December 22, 2008, the contents of which are incorporated herein by reference.

3GPP (3rd Generation Partnership Project) examines and creates specifications for mobile communication systems based on networks that have developed W-CDMA (Wideband-Code Division Multiple Access) and GSM (Global System for Mobile Communications). It is a project to be performed. In 3GPP, the W-CDMA system is standardized as a third generation cellular mobile communication system, and services are started sequentially. Also, HSDPA (High-Speed Downlink Packet Access), which further increases the communication speed, has been standardized and the service has been started. 3GPP uses the evolution of third-generation radio access technology (hereinafter referred to as “LTE (Long Term Evolution)” or “EUTRA (Evolved Universal Terrestrial Radio Access))) and a wider frequency band. Thus, studies on a mobile communication system (hereinafter, referred to as “LTE-A Evolution-Advanced” or “Advanced-EUTRA”) that achieves higher-speed data transmission / reception are in progress. .

As communication methods in LTE, OFDMA (Orthogonal Frequency Division Multiple Access) schemes that perform user multiplexing using mutually orthogonal subcarriers and SC-FDMA (Single Carrier-Frequency Division Multiple Access) schemes are being studied. . That is, an OFDMA scheme that is a multicarrier communication scheme is proposed for the downlink, and an SC-FDMA scheme that is a single carrier communication scheme is proposed for the uplink.

On the other hand, as a communication method in LTE-A, the OFDMA method is used in the downlink, and the SC-FDMA method that is a single carrier communication method in the uplink, the OFDMA method that is a multicarrier communication method, and the Clustered-SC- It has been proposed to introduce an FDMA (Clustered-Single Carrier-Frequency Division Multiple Access or DFT-S-OFDM with Spectrum Division Control) method (Non-patent Document 1). Here, in LTE and LTE-A, the SC-FDMA scheme proposed as an uplink communication scheme keeps the PAPR (Peak-to-Average-Power-Ratio) when transmitting data low. It has the feature that it can.

In LTE-A, while the frequency band used in a general mobile communication system is continuous, a plurality of continuous / discontinuous frequency bands (hereinafter referred to as “Carrier Component (CC)”, or , "Component carrier (CC: Component Carrier)") is used in combination and operated as one frequency band (wideband frequency band) (frequency band aggregation: SpectrumSpecaggregation, Carrier aggregation, Frequency aggregation) Etc.) is proposed. In addition, in order for the base station apparatus and the mobile station apparatus to perform communication using a broadband frequency band more flexibly, the frequency band used for downlink communication and the frequency band used for uplink communication are different. It has also been proposed to use a frequency bandwidth (Non-Patent Document 2).

Further, in LTE and LTE-A, for downlink transmission from a base station apparatus, a mobile station apparatus uses an uplink to transmit HARQ (Hybrid Automatic Repeat Request) ACK / NACK (affirmation). Response: Positive Acknowledgement / Negative response: Negative Acknowledgement, ACK signal or NACK signal). That is, the base station apparatus transmits data (unit) (hereinafter referred to as “(downlink) transport block”) through the downlink transport channel, and the mobile station apparatus transmits the downlink transport block. HARQ ACK / NACK to the base station apparatus using a physical uplink control channel (hereinafter PUCCH: Physical Uplink Control Channel) and / or a physical uplink shared channel (hereinafter PUSCH: Physical Uplink Shared Channel) To do.

However, in the prior art, a wideband frequency band (for example, a frequency band used for downlink communication (hereinafter, DL system band, DL system) composed of a plurality of continuous / discontinuous frequency bands (carrier elements) is used. The base station apparatus and the mobile station apparatus use a frequency band (also referred to as bandwidth) of 100 MHz and a frequency bandwidth used for uplink communication (hereinafter also referred to as UL system band and UL system bandwidth) of 40 MHz). When performing communication, when the base station apparatus transmits a plurality of downlink transport blocks in the same subframe using a plurality of downlink carrier elements, the mobile station apparatus transmits the transmitted downlink transformer. When the port block cannot be detected (when the transmitted downlink transport block cannot be received) ) Transmission and reception of information indicating the ACK / NACK of HARQ considering has not been performed. That is, when the mobile station apparatus cannot detect the downlink transport block, transmission / reception of information indicating ACK / NACK of HARQ with respect to the downlink transport block exchanged between the base station apparatus and the mobile station apparatus is performed. There was a problem that it was not done correctly.

FIG. 6 is a diagram showing a DL system band and a UL system band in the conventional technology. In FIG. 6, for the downlink, a DL system band having a bandwidth of 80 MHz is shown as an example, and the DL system band has four carrier elements (DCC-0: Downlink Component having a bandwidth of 20 MHz). Carrier-0, DCC-1, DCC-2, DCC-3). On the other hand, for the uplink, as an example, a UL system band having a bandwidth of 40 MHz is shown. The UL system band has two carrier elements (UCC-0: Uplink Component Carrier-) having a bandwidth of 20 MHz. 0, UCC-1). In the mobile communication system shown in FIG. 6, the base station apparatus and the mobile station apparatus transmit and receive four (up to) downlink transport blocks in the same subframe using each of the four downlink carrier elements. Thus, high-speed data transmission / reception using a wide frequency band can be realized.

As shown in FIG. 6, in the conventional technique, the base station apparatus and the mobile station apparatus have a plurality of downlink carrier elements (DCC-0 and DCC-1, DCC-2 and DCC-3) and uplink carriers. Communicating with corresponding elements (UCC-0, UCC-1) (DCC-0, DCC-1 with UCC-0, DCC-2, DCC-3 with UCC-1 ) That is, the base station apparatus transmits the downlink transport block using the downlink carrier element DCC-0 and / or DCC-1, and the mobile station apparatus uses the corresponding uplink carrier element UCC-0. Thus, information indicating HARQ ACK / NACK for the transmitted downlink transport block is transmitted. Also, the base station apparatus transmits downlink transport blocks using downlink carrier elements DCC-2 and / or DCC-3, and the mobile station apparatus uses the corresponding uplink carrier element UCC-1 Thus, information indicating HARQ ACK / NACK for the transmitted downlink transport block is transmitted.

However, in the conventional technology, when the base station apparatus transmits two downlink transport blocks to the mobile station apparatus in the same subframe using, for example, DCC-0 and DCC-1, the mobile station apparatus , It is assumed that information indicating HARQ ACK / NACK for two downlink transport blocks is transmitted. On the other hand, when the mobile station apparatus cannot detect the downlink transport block transmitted using DCC-0 among the two downlink transport blocks transmitted from the base station apparatus, DCC-1 is used. Only the information indicating the HARQ ACK / NACK for the downlink transport block transmitted using (ie, only the information indicating the HARQ ACK / NACK for one downlink transport block) is transmitted to the base station apparatus.

The mobile station apparatus transmits information such as normal uplink data (for example, user data) in addition to information indicating HARQ ACK / NACK using resources allocated by the base station apparatus. When the base station apparatus thinks that HARQ for two downlink transport blocks is transmitted, the mobile station apparatus transmits only information indicating ACK / NACK of HARQ for one downlink transport block. When the uplink data (for example, user data) is transmitted using the remaining allocated resources, the base station apparatus transmits the uplink data (for example, user data) transmitted from the mobile station apparatus to the downlink. It is determined as information indicating HARQ ACK / NACK for the transport block. For example, it is determined that the information indicates HARQ ACK / NACK for the downlink transport block transmitted using DCC-0. That is, when transmitting and receiving a plurality of downlink transport blocks in the same subframe between the base station apparatus and the mobile station apparatus, the mobile station apparatus transmits uplink data (for example, user data). Regardless, the base station apparatus determines that the information indicates HARQ ACK / NACK for the downlink transport block, and information indicating HARQ ACK / NACK for the downlink transport block is not correctly transmitted / received. A problem will occur.

The present invention has been made in view of such circumstances, and when a base station apparatus and a mobile station apparatus perform communication using a wide frequency band constituted by carrier elements, a plurality of downlinks are provided. It is an object of the present invention to provide a mobile communication system and a mobile communication method capable of correctly transmitting and receiving information indicating HARQ ACK / NACK for a plurality of downlink transport blocks transmitted in the same subframe using a plurality of carrier elements.

In order to achieve the above object, the present invention has taken the following measures. That is, the mobile communication system of the present invention is a mobile communication system in which a base station apparatus and a mobile station apparatus perform communication by aggregating a plurality of component carriers, and the base station apparatus physically transmits a downlink transport block. Transmitting to the mobile station apparatus using a downlink shared channel, transmitting an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe to the mobile station apparatus, In response to the information indicating the number of physical downlink shared channels, the station apparatus transmits information indicating ACK (acknowledgement) / NACK (negative response) of HARQ (hybrid automatic retransmission request) for the downlink transport block. It transmits to a base station apparatus.

The base station apparatus and the mobile station apparatus are mobile communication systems that perform communication by aggregating a plurality of component carriers. The base station apparatus uses a physical downlink shared channel for downlink transport blocks. An uplink transmission permission signal including information indicating the number of physical downlink shared channels transmitted in the same subframe in a plurality of downlink component carriers corresponding to one uplink component carrier transmitted to the mobile station device, The mobile station device transmits information indicating HARQ ACK / NACK for the downlink transport block to the base station device according to the information indicating the number of physical downlink shared channels. It is characterized by doing.

In addition, the mobile station apparatus uses the physical uplink shared channel resource allocated by the uplink transmission permission signal to transmit information indicating HARQ ACK / NACK for the downlink transport block to the base station apparatus. It is characterized by transmitting to.

The base station apparatus and the mobile station apparatus are base station apparatuses in a mobile communication system in which a plurality of component carriers are aggregated to perform communication, and a downlink transport block is transmitted using a physical downlink shared channel. Means for transmitting to the station apparatus, and means for transmitting to the mobile station apparatus an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe.

The base station apparatus and the mobile station apparatus are base station apparatuses in a mobile communication system in which a plurality of component carriers are aggregated to perform communication, and a downlink transport block is transmitted using a physical downlink shared channel. An uplink transmission permission signal including means for transmitting to a station apparatus and information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink component carriers corresponding to one uplink component carrier And means for transmitting to the mobile station apparatus.

The base station apparatus and the mobile station apparatus are mobile station apparatuses in a mobile communication system that perform communication by aggregating a plurality of component carriers, and the base station apparatus and the mobile station apparatus use a physical downlink shared channel for the downlink transport block. Means for receiving from a base station apparatus, means for receiving an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated by the base station apparatus in the same subframe, from the base station apparatus; Means for transmitting information indicating HARQ ACK / NACK for the downlink transport block to the base station apparatus according to information indicating the number of downlink shared channels.

The base station apparatus and the mobile station apparatus are mobile station apparatuses in a mobile communication system that perform communication by aggregating a plurality of component carriers, and the base station apparatus and the mobile station apparatus use a physical downlink shared channel for the downlink transport block. Means for receiving from the station apparatus, and the base station apparatus includes information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink component carriers corresponding to one uplink component carrier In response to means for receiving a link transmission permission signal from the base station apparatus and information indicating the number of physical downlink shared channels, information indicating HARQ ACK / NACK for the downlink transport block is received from the base station apparatus. Means for transmitting to There.

Further, the means for transmitting HARQ ACK / NACK information for the downlink transport block to the base station apparatus transmits information indicating HARQ ACK / NACK for the downlink transport block to the uplink transmission permission. The transmission is performed using the physical uplink shared channel resource allocated by the signal to the base station apparatus.

In addition, a communication method of a mobile station apparatus in a mobile communication system in which a base station apparatus and a mobile station apparatus perform communication by aggregating a plurality of component carriers, and a downlink transport block is used as a physical downlink shared channel. Received from the base station apparatus, the base station apparatus receives an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe from the base station apparatus, and According to the information indicating the number of link shared channels, information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus.

In addition, a communication method of a mobile station apparatus in a mobile communication system in which a base station apparatus and a mobile station apparatus perform communication by aggregating a plurality of component carriers, and a downlink transport block is used as a physical downlink shared channel. Including information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink component carriers corresponding to one uplink component carrier. An uplink transmission permission signal is received from the base station apparatus, and information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus according to information indicating the number of physical downlink shared channels. It is characterized by transmitting.

According to the present invention, when a base station apparatus and a mobile station apparatus perform communication using a wide band system band constituted by carrier elements, they use a plurality of downlink carrier elements in the same subframe. It is possible to provide a mobile communication system and a mobile communication method capable of correctly transmitting / receiving information indicating HARQ ACK / NACK for a plurality of downlink transport blocks to be transmitted.

It is a figure which shows notionally the structure of a physical channel. It is a block diagram which shows schematic structure of the base station apparatus 100 which concerns on embodiment of this invention. It is a block diagram which shows schematic structure of the mobile station apparatus 200 which concerns on embodiment of this invention. It is a figure which shows the example of the mobile communication system which can apply 1st Embodiment. It is a figure which shows the example of the mobile communication system which can apply 1st Embodiment. It is a figure which shows the frequency band of the uplink and downlink in a prior art.

Next, an embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a channel according to an embodiment of the present invention. The downlink physical channel includes a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH: Physical Downlink Control Channel), a physical downlink shared channel (PDSCH: Physical Downlink Shared Channel), a physical multicast channel ( PMCH: Physical Multicast Channel, physical control format instruction channel (PCFICH: Physical Control Format Indicator Channel), and physical hybrid automatic retransmission request instruction channel (PHICH: Physical Hybrid ARQ Indicator Channel). An uplink physical channel is configured by a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH: Physical Random Access channel). The

The physical broadcast channel (PBCH) maps the broadcast channel (BCH) at intervals of 40 milliseconds. The timing of 40 milliseconds is blind detection. That is, explicit signaling is not performed for timing presentation. In addition, a subframe including a physical broadcast channel (PBCH) can be decoded only by the subframe (self-decodable).

The physical downlink control channel (PDCCH) includes physical downlink shared channel (PDSCH) resource allocation, hybrid automatic repeat request (HARQ) information for downlink data, and physical uplink shared channel (PUSCH). This is a channel used to notify the mobile station apparatus of the uplink transmission permission that is the resource allocation.

When the PDCCH includes a physical downlink shared channel resource allocation, the mobile station apparatus uses the physical downlink shared channel (PDSCH) according to the resource allocation indicated by the PDCCH from the base station apparatus (data ( Downlink data and / or downlink control data). That is, this PDCCH is a signal for performing resource allocation for the downlink (hereinafter referred to as “downlink transmission permission signal” or “downlink grant”). Further, when the PDCCH includes physical uplink shared channel resource allocation, the mobile station device uses the physical uplink shared channel (PUSCH) according to the resource allocation indicated by the PDCCH from the base station device. Data (uplink data and / or uplink control data) is transmitted. That is, the PDCCH is a signal that permits data transmission on the uplink (hereinafter referred to as an “uplink transmission permission signal” or “uplink grant”).

The physical downlink shared channel (PDSCH) is a channel used for transmitting downlink data (downlink shared channel: DL-SCH) or paging information (paging channel: PCH). The physical multicast channel (PMCH) is a channel used for transmitting the multicast channel (MCH), and a downlink reference signal, an uplink reference signal, and a physical downlink synchronization signal are separately arranged.

Here, downlink data (DL-SCH) indicates transmission of user data, for example, and DL-SCH is a transport channel. In DL-SCH, HARQ and dynamic adaptive radio link control are supported, and beamforming can be used. The DL-SCH supports dynamic resource allocation and semi-static resource allocation.

The physical uplink shared channel (PUSCH) is a channel mainly used for transmitting uplink data (uplink shared channel: UL-SCH). When the base station apparatus schedules the mobile station apparatus, control data is also transmitted using PUSCH. The control data includes channel state information such as downlink channel quality identifier CQI (Channel Quality Indicator), precoding matrix identifier PMI (Precoding Matrix Indicator), rank identifier RI (Rank Rank Indicator), and downlink transmission (downlink). HARQ ACK / NACK for the link transport block).

Here, uplink data (UL-SCH) indicates, for example, transmission of user data, and UL-SCH is a transport channel. In UL-SCH, HARQ and dynamic adaptive radio link control are supported, and beamforming can be used. UL-SCH supports dynamic resource allocation and quasi-static resource allocation.

Also, in uplink data (UL-SCH) and downlink data (DL-SCH), a radio resource control signal (hereinafter referred to as “RRC signaling: Radio （Resource Control Signaling”) exchanged between the base station apparatus and the mobile station apparatus. ”, MAC (Medium Access Control) control elements, and the like may be included.

The physical uplink control channel (PUCCH) is a channel used for transmitting control data. Here, the control data is, for example, channel state information (CQI, PMI, RI) transmitted (feedback) from the mobile station apparatus to the base station apparatus, and resource allocation for the mobile station apparatus to transmit uplink data. Scheduling request (SR: Scheduling Request), HARQ ACK / NACK for downlink transmission (downlink transport block), and the like are included.

The physical control format indication channel (PCFICH) is a channel used to notify the mobile station apparatus of the number of OFDM symbols used for PDCCH, and is transmitted in each subframe. The physical hybrid automatic repeat request instruction channel (PHICH) is a channel used for transmitting ACK / NACK used for HARQ of uplink data. The physical random access channel (PRACH) is a channel used for transmitting a random access preamble and has a guard time. As shown in FIG. 1, the mobile communication system according to the present embodiment includes a base station device 100 and a mobile station device 200.

[Configuration of base station apparatus]
FIG. 2 is a block diagram showing a schematic configuration of the base station apparatus 100 according to the embodiment of the present invention. The base station apparatus 100 includes a data control unit 101, a transmission data modulation unit 102, a radio unit 103, a scheduling unit 104, a channel estimation unit 105, a received data demodulation unit 106, a data extraction unit 107, and an upper layer. 108 and an antenna 109. The radio unit 103, the scheduling unit 104, the channel estimation unit 105, the reception data demodulation unit 106, the data extraction unit 107, the upper layer 108 and the antenna 109 constitute a reception unit, and the data control unit 101, the transmission data modulation unit 102, The radio unit 103, the scheduling unit 104, the upper layer 108, and the antenna 109 constitute a transmission unit.

The antenna 109, the radio unit 103, the channel estimation unit 105, the reception data demodulation unit 106, and the data extraction unit 107 perform processing on the uplink physical layer. The antenna 109, the radio unit 103, the transmission data modulation unit 102, and the data control unit 101 perform downlink physical layer processing.

The data control unit 101 receives a transport channel from the scheduling unit 104. The data control unit 101 maps the transport channel and the signal and channel generated in the physical layer to the physical channel based on the scheduling information input from the scheduling unit 104. Each piece of data mapped as described above is output to transmission data modulation section 102.

The transmission data modulation unit 102 modulates transmission data to the OFDM scheme. The transmission data modulation unit 102 performs data modulation, coding, and coding on the data input from the data control unit 101 based on the scheduling information from the scheduling unit 104 and the modulation scheme and coding scheme corresponding to each PRB. Input signal serial / parallel conversion, IFFT (Inverse Fourier Transform) processing, CP (Cyclic Prefix) insertion, filtering, and other signal processing are performed to generate transmission data, and to the wireless unit 103 Output. Here, the scheduling information includes downlink physical resource block PRB (Physical Resource Block) allocation information, for example, physical resource block position information composed of frequency and time. The modulation scheme and coding scheme corresponding to each PRB include, for example, information such as modulation scheme: 16QAM and coding rate: 2/3 coding rate.

The radio unit 103 up-converts the modulation data input from the transmission data modulation unit 102 to a radio frequency to generate a radio signal, and transmits the radio signal to the mobile station apparatus 200 via the antenna 109. Radio section 103 receives an uplink radio signal from mobile station apparatus 200 via antenna 109, down-converts it into a baseband signal, and receives received data as channel estimation section 105 and received data demodulation section 106. And output.

The scheduling unit 104 performs processing of a medium access control (MAC: Medium Access Control) layer. The scheduling unit 104 performs mapping between logical channels and transport channels, downlink and uplink scheduling (HARQ processing, selection of transport format, etc.), and the like. Since the scheduling unit 104 controls the processing units of each physical layer in an integrated manner, the scheduling unit 104, the antenna 109, the radio unit 103, the channel estimation unit 105, the reception data demodulation unit 106, the data control unit 101, the transmission data modulation There is an interface between the unit 102 and the data extraction unit 107 (not shown).

In downlink scheduling, the scheduling unit 104 receives feedback information (uplink channel state information (CQI, PMI, RI), ACK / NACK information for downlink data, etc.) received from the mobile station apparatus 200, each mobile station Downlink transport format (transmission form, ie, allocation of physical resource blocks) for modulating each data based on PRB information usable by the apparatus, buffer status, scheduling information input from higher layer 108, etc. And modulation scheme and coding scheme), HARQ retransmission control, and scheduling information used for downlink. The scheduling information used for downlink scheduling is output to the data control unit 101.

Further, in uplink scheduling, the scheduling unit 104 estimates the uplink channel state (radio channel state) output from the channel estimation unit 105, the resource allocation request from the mobile station device 200, and each mobile station device 200. Based on the available PRB information, scheduling information input from the higher layer 108, etc., an uplink transport format for modulating each data (transmission form, ie, physical resource block allocation and modulation scheme and Encoding information and the like, and scheduling information used for uplink scheduling. Scheduling information used for uplink scheduling is output to the data control unit 101.

Also, the scheduling unit 104 maps the downlink logical channel input from the higher layer 108 to the transport channel, and outputs it to the data control unit 101. In addition, the scheduling unit 104 processes the control data and the transport channel acquired in the uplink input from the data extraction unit 107 as necessary, maps them to the uplink logical channel, and outputs them to the upper layer 108. To do.

The channel estimation unit 105 estimates an uplink channel state from an uplink demodulation reference signal (DRS: Demodulation Reference Signal) for demodulation of uplink data, and outputs the estimation result to the reception data demodulation unit 106. . Further, in order to perform uplink scheduling, an uplink channel state is estimated from an uplink measurement reference signal (SRS: Sounding Reference Signal), and the estimation result is output to the scheduling section 104.

Received data demodulator 106 also serves as an OFDM demodulator and / or DFT-Spread-OFDM (DFT-S-OFDM) demodulator that demodulates received data modulated in the OFDM scheme and / or SC-FDMA scheme. Yes. Based on the uplink channel state estimation result input from the channel estimation unit 105, the reception data demodulation unit 106 performs DFT conversion, subcarrier mapping, IFFT conversion, filtering, and the like on the modulation data input from the radio unit 103. Are subjected to demodulation processing and output to the data extraction unit 107.

The data extraction unit 107 confirms the correctness of the data input from the reception data demodulation unit 106 and outputs a confirmation result (positive signal ACK / negative signal NACK) to the scheduling unit 104. The data extraction unit 107 separates the data input from the reception data demodulation unit 106 into a transport channel and physical layer control data, and outputs the data to the scheduling unit 104. The separated control data includes channel state information (CQI, PMI, RI) notified from the mobile station apparatus 200, ACK / NACK information, a scheduling request, and the like.

The upper layer 108 performs processing of a packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, a radio link control (RLC: Radio Link Control) layer, and a radio resource control (RRC: Radio Resource Control) layer. The upper layer 108 integrates and controls the processing units of the lower layer, so the upper layer 108, the scheduling unit 104, the antenna 109, the radio unit 103, the channel estimation unit 105, the received data demodulation unit 106, the data control unit 101, There is an interface between the transmission data modulation unit 102 and the data extraction unit 107 (not shown).

The upper layer 108 has a radio resource control unit 110 (also referred to as a control unit). Further, the radio resource control unit 110 manages various setting information, system information, paging control, communication state management of each mobile station device, mobility management such as handover, management of buffer status for each mobile station device, Management of unicast and multicast bearer connection settings, management of mobile station identifiers (UEID), and the like are performed. The upper layer 108 exchanges information with another base station apparatus and information with an upper node.

[Configuration of mobile station device]
FIG. 3 is a block diagram showing a schematic configuration of the mobile station apparatus 200 according to the embodiment of the present invention. The mobile station apparatus 200 includes a data control unit 201, a transmission data modulation unit 202, a radio unit 203, a scheduling unit 204, a channel estimation unit 205, a reception data demodulation unit 206, a data extraction unit 207, and an upper layer. 208 and an antenna 209. The data control unit 201, transmission data modulation unit 202, radio unit 203, scheduling unit 204, higher layer 208, and antenna 209 constitute a transmission unit, and the radio unit 203, scheduling unit 204, channel estimation unit 205, received data demodulation unit Unit 206, data extraction unit 207, upper layer 208, and antenna 209 constitute a reception unit.

The data control unit 201, the transmission data modulation unit 202, and the radio unit 203 perform processing of the uplink physical layer. The radio unit 203, the channel estimation unit 205, the received data demodulation unit 206, and the data extraction unit 207 perform downlink physical layer processing.

The data control unit 201 receives the transport channel from the scheduling unit 204. The transport channel and the signal and channel generated in the physical layer are mapped to the physical channel based on the scheduling information input from the scheduling unit 204. Each piece of data mapped in this way is output to transmission data modulation section 202.

The transmission data modulation unit 202 modulates the transmission data into the OFDM scheme and / or the SC-FDMA scheme. The transmission data modulation unit 202 performs data modulation, DFT (Discrete Fourier Transform) processing, subcarrier mapping, IFFT (Inverse Fast Fourier Transform) processing, CP insertion, filtering, and other signals on the data input from the data control unit 201. Processing is performed, transmission data is generated, and output to the wireless unit 203.

The radio unit 203 up-converts the modulation data input from the transmission data modulation unit 202 to a radio frequency to generate a radio signal, and transmits the radio signal to the base station apparatus 100 via the antenna 209. Radio section 203 receives a radio signal modulated with downlink data from base station apparatus 100 via antenna 209, down-converts it to a baseband signal, and receives the received data as channel estimation section 205. And output to the received data demodulation section 206.

The scheduling unit 204 performs processing of a medium access control (MAC: Medium Access Control) layer. The scheduling unit 204 performs mapping between logical channels and transport channels, downlink and uplink scheduling (HARQ processing, transport format selection, etc.), and the like. Since the scheduling unit 204 controls the processing units of each physical layer in an integrated manner, the scheduling unit 204, the antenna 209, the data control unit 201, the transmission data modulation unit 202, the channel estimation unit 205, the reception data demodulation unit 206, the data There is an interface between the extraction unit 207 and the wireless unit 203 (not shown).

In downlink scheduling, the scheduling unit 204 controls reception of transport channels, physical signals, and physical channels based on scheduling information (transport format and HARQ retransmission information) from the base station apparatus 100 and the upper layer 208, and the like. Scheduling information used for HARQ retransmission control and downlink scheduling is generated. The scheduling information used for downlink scheduling is output to the data control unit 201.

In uplink scheduling, the scheduling unit 204 receives the uplink buffer status input from the higher layer 208 and uplink scheduling information from the base station apparatus 100 input from the data extraction unit 207 (transport format and HARQ retransmission). Information), and scheduling processing for mapping the uplink logical channel input from the upper layer 208 to the transport channel and the uplink scheduling based on the scheduling information input from the upper layer 208, etc. Scheduling information to be generated is generated. Note that the information notified from the base station apparatus 100 is used for the uplink transport format. The scheduling information is output to the data control unit 201.

Also, the scheduling unit 204 maps the uplink logical channel input from the higher layer 208 to the transport channel, and outputs it to the data control unit 201. Further, the scheduling unit 204 also uses the data control unit 201 for the downlink channel state information (CQI, PMI, RI) input from the channel estimation unit 205 and the CRC check confirmation result input from the data extraction unit 207. Output to. In addition, the scheduling unit 204 processes the control data and the transport channel acquired in the downlink input from the data extraction unit 207 as necessary, maps them to the downlink logical channel, and outputs them to the upper layer 208. To do.

The channel estimation unit 205 estimates the downlink channel state from the downlink reference signal (RS) and demodulates the downlink data, and outputs the estimation result to the reception data demodulation unit 206. Further, the channel estimation unit 205 estimates the downlink channel state from the downlink reference signal (RS) in order to notify the base station apparatus 100 of the estimation result of the downlink channel state (radio channel state), This estimation result is converted into downlink channel state information (CQI, PMI, RI, etc.) and output to scheduling section 204.

Received data demodulation section 206 demodulates received data modulated by the OFDM method. Reception data demodulation section 206 performs demodulation processing on the modulated data input from radio section 203 based on the downlink channel state estimation result input from channel estimation section 205 and outputs the result to data extraction section 207. To do.

The data extraction unit 207 performs a CRC check on the data input from the reception data demodulation unit 206, confirms the correctness and outputs a confirmation result (acknowledgment ACK / negative response NACK) to the scheduling unit 204. The data extraction unit 207 separates the data input from the reception data demodulation unit 206 into transport channel and physical layer control data, and outputs the data to the scheduling unit 204. The separated control data includes scheduling information such as downlink or uplink resource allocation and uplink HARQ control information.

The upper layer 208 performs processing of a packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, a radio link control (RLC: Radio Link Control) layer, and a radio resource control (RRC: Radio Resource Control) layer. The upper layer 208 integrates and controls the processing units of the lower layer, so that the upper layer 208, the scheduling unit 204, the antenna 209, the data control unit 201, the transmission data modulation unit 202, the channel estimation unit 205, the reception data demodulation unit 206, an interface between the data extraction unit 207 and the radio unit 203 exists (not shown).

The upper layer 208 has a radio resource control unit 210 (also referred to as a control unit). The radio resource control unit 210 manages various setting information, system information, paging control, own station communication status, mobility management such as handover, buffer status management, unicast and multicast bearer connection setting. Management and management of mobile station identifier (UEID).

(First embodiment)
Next, a first embodiment in a mobile communication system using the base station apparatus 100 and the mobile station apparatus 200 will be described. In the first embodiment, the base station apparatus transmits a downlink transport block using a physical downlink shared channel, and uplinks information indicating the number of physical downlink shared channels allocated in the same subframe. In response to the information indicating the number of physical downlink shared channels allocated in the same subframe included in the uplink grant signal, the mobile station apparatus transmits the HARQ for the downlink transport block. Information indicating ACK / NACK is transmitted.

Further, the base station apparatus transmits a downlink transport block using a physical downlink shared channel, and is allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element. The mobile station apparatus transmits information indicating the number of physical downlink shared channels included in the uplink transmission permission signal, and the mobile station apparatus transmits a plurality of downlink carrier elements corresponding to one uplink carrier element included in the uplink permission signal. Information indicating HARQ ACK / NACK for the downlink transport block is transmitted according to information indicating the number of physical downlink shared channels allocated in the same subframe within the carrier element.

Hereinafter, in the first embodiment, the frequency band is defined by the bandwidth (Hz), but may be defined by the number of resource blocks (RB) configured by the frequency and time. The carrier element in this embodiment indicates a (narrow band) frequency band used when a base station apparatus and a mobile station apparatus perform communication in a mobile communication system having a (wide band) system band. The base station device and the mobile station device aggregate a plurality of carrier elements (for example, five frequency bands having a bandwidth of 20 MHz) (frequency band aggregation: also called Spectrum aggregation, Carrier aggregation, Frequency aggregation, etc.). Thus, a (broadband) system band (for example, a system band having a bandwidth of 100 MHz) can be configured, and high-speed data communication (information transmission / reception) can be realized.

Each carrier element is a (narrowband) frequency band (for example, a frequency band having a bandwidth of 20 MHz) constituting this (broadband) system band (for example, a system band having a bandwidth of 100 MHz). It is shown that. That is, the downlink carrier element has a part of the frequency band that can be used when the base station apparatus and the mobile station apparatus transmit and receive downlink information, and the uplink carrier element is The base station device and the mobile station device have a part of the bandwidth that can be used when uplink information is transmitted and received. The carrier element may be defined as a unit in which a specific physical channel (for example, PDCCH, PUCCH, etc.) is configured.

Further, the carrier element itself constituting this wide frequency band may be further constituted by a plurality of carrier elements. Hereinafter, in the present embodiment, a carrier element constituted by a plurality of carrier elements (groups) is referred to as a carrier element group (CCG: Component Carrier Group, Carrier Component Group). For example, in the present embodiment, a broadband system band (for example, a system band having a bandwidth of 100 MHz) is divided into two carrier element groups (for example, a carrier element group (CCG-0) having a bandwidth of 40 MHz). The carrier element group (CCG-1) having a bandwidth of 60 MHz), and each of the two carrier element groups can be further constituted by a plurality of carrier elements. For example, a carrier element group (CCG-0) having a bandwidth of 40 MHz is configured by aggregating two carrier elements (CC-0, CC-1) having a bandwidth of 20 MHz, and a bandwidth of 60 MHz. A carrier element group (CCG-1) having a width can be configured by aggregating three carrier elements (CC-2, CC-3, CC-4) having a bandwidth of 20 MHz. The carrier element and / or the carrier element group may be arranged in a continuous frequency band or a discontinuous frequency band, and a plurality of carriers that are continuous and / or discontinuous frequency bands. By aggregating elements and / or carrier element groups, a broadband system band can be constructed. Furthermore, the downlink frequency band (DL system band, DL system bandwidth) and the uplink frequency band (UL system band, UL system bandwidth) configured by carrier elements and / or carrier element groups have the same bandwidth. Need not be. Even if the base station apparatus and the mobile station apparatus have different bandwidths for the DL system band and the UL system band, they can communicate using these frequency bands.

FIG. 4 is a diagram illustrating an example of a mobile communication system to which the first embodiment can be applied. FIG. 4 illustrates, as an example for explaining the first embodiment, a DL system band (for example, a frequency band having a bandwidth of 100 MHz) includes five downlink carrier elements (DCC-0). , DCC-1, DCC-2, DCC-3, DCC-4, for example, each shows a downlink carrier element having a bandwidth of 20 MHz.) . In FIG. 4, the physical downlink shared channel (PDSCH) of each of the downlink carrier elements (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4) (which may also be arranged in each). ) Is described as DCC-0 PDSCH, DCC-1 PDSCH, DCC-2 PDSCH, DCC-3 PDSCH, DCC-4 PDSCH.

In the first embodiment, the base station apparatus uses physical downlink shared channels (PDSCH) of downlink carrier elements (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4). Then, the downlink transport block is transmitted to the mobile station apparatus. That is, the base station apparatus can transmit, to the mobile station apparatus, downlink transport blocks up to the number of downlink carrier elements (up to 5 in this example) that configure the DL system band in the same subframe. it can.

FIG. 4 also shows that the UL system band (for example, a frequency band having a bandwidth of 100 MHz) includes five uplink carrier elements (UCC-0, UCC-1, UCC-2, UCC-3, UCC-4, for example, uplink carrier elements each having a bandwidth of 20 MHz are shown)). Here, the DL system band is composed of DCC-0, DCC-1, DCC-2, DCC-3, and DCC-4. This means that the DL system band is DCC-0, DCC-1, DCC. -2, DCC-3, and DCC-4. Also, the fact that the UL system band is composed of UCC-0, UCC-1, UCC-2, UCC-3, and UCC-4 means that the UL system band is divided into UCC-0, UCC-1, UCC- It can also be interpreted that it can be divided into 2, UCC-3 and UCC-4.

In the mobile communication system shown in FIG. 4, the mobile station apparatus transmits HARQ ACK / NACK for the downlink transport block transmitted from the base station apparatus to uplink carrier elements (UCC-0, UCC-1, UCC- 2, UCC-3, UCC-4) using a physical uplink control channel (PUCCH). In addition, when a physical uplink shared channel (PUSCH) is allocated by an uplink grant signal transmitted from the base station apparatus, the mobile station apparatus uses the allocated PUSCH resource to perform downlink transport. Send HARQ ACK / NACK for the block.

Here, the base station apparatus can transmit a plurality of uplink transmission permission signals in the same subframe to the mobile station apparatus. In FIG. 4, as an example, the base station apparatus transmits the PUSCH resource of UCC-0 using the uplink grant signal transmitted using DCC-0 and UCC- using the uplink grant signal transmitted using DCC-1. 1 PUSCH resource using the uplink grant signal transmitted using DCC-2, the PUSCH resource of UCC-2 using the uplink grant signal transmitted using DCC-3, and the PUSCH resource of UCC-3 using the uplink grant signal transmitted using DCC-3, The uplink grant signal transmitted using DCC-4 indicates that the USCH-4 PUSCH resource is allocated to the mobile station apparatus in the same subframe.

As described above, in the first embodiment, the base station apparatus transmits the downlink transport block using the physical downlink shared channel, and the number of physical downlink shared channels allocated in the same subframe. The mobile station apparatus transmits the information indicating the number of physical downlink shared channels allocated in the same subframe included in the uplink permission signal in accordance with the information indicating the number of physical downlink shared channels included in the uplink permission signal. Information indicating HARQ ACK / NACK for the transport block is transmitted.

* A specific example will be described. In the mobile communication system shown in FIG. 4, the base station apparatus uses the PDSCH of each of the five downlink carrier elements DCC-0, DCC-1, DCC-2, DCC-3, and DCC-4 to generate the downlink. Send the transport block. That is, the base station apparatus allocates five PDSCH resources to transmit downlink transport blocks. Furthermore, the base station apparatus uses “5” as information indicating the number of PDSCHs assigned in the same subframe (or the number of carrier elements assigned PDSCH) using downlink carrier element DCC-0. ”(Here, information indicating the total number“ 5 ”of PDSCH allocated in the same subframe) is transmitted. The mobile station apparatus has five downlink transports according to information indicating the number of PDSCHs assigned in the same subframe included in the uplink transmission permission signal from the base station apparatus (in this case, information indicating “5”). Information indicating the HARQ ACK / NACK for the block is transmitted using the PUSCH of UCC-0. Here, when the mobile station apparatus transmits information indicating HARQ ACK / NACK for five downlink transport blocks, for example, information indicating HARQ ACK / NACK for five downlink transport blocks Can be sent in bundles (bundles) or multiplexed. That is, the mobile station apparatus determines the number of PDSCH allocated in the same subframe as the uplink resource (time and / or frequency and / or phase resource) allocated by the uplink transmission permission signal from the base station apparatus. Depending on the information to be shown, five downlink transport blocks are bundled (bundle: bundled) or multiplexed and transmitted.

Here, the mobile station apparatus is transmitting information indicating HARQ ACK / NACK to the information indicating HARQ ACK / NACK for the bundled downlink transport block, or DTX (Discontinuous Transmission). A code for discriminating (identifying and instructing) whether the information to be transmitted is transmitted may be scrambled (the information indicating HARQ ACK / NACK may be transmitted with a scrambling code transmitted) . Here, DTX indicates that the mobile station device has not been able to detect the physical downlink control channel (PDCCH) itself from the base station device, and the information indicating DTX is a downlink carrier element. The information which shows that at least 1 PDCCH was not able to be detected among several PDCCH transmitted using is shown. Further, the mobile station apparatus transmits information corresponding to HARQ ACK / NACK bundled with codes corresponding to downlink carrier elements (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4). The PDCCH could not be detected (DTX) by transmitting the information by scrambled to (transmitted information indicating HARQ ACK / NACK with a scrambling code corresponding to each downlink carrier element) The carrier elements may be distinguished (identified and instructed) for transmission. Further, the mobile station apparatus transmits information corresponding to HARQ ACK / NACK bundled with codes corresponding to downlink carrier elements (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4). Scrambled and transmitted (information indicating HARQ ACK / NACK is transmitted with a scrambling code corresponding to each downlink carrier element), and information indicating ACK (or NACK) is transmitted At least one downlink carrier element may be indicated (identified and indicated) for transmission. The code that the mobile station apparatus scrambles to the information indicating the HARQ ACK / NACK can be defined in advance according to the specification, etc., and the mobile station apparatus selects the predefined code and transmits the HARQ ACK / NACK By scrambling the indicated information, the processing (operation) as described above can be efficiently performed without newly adding a control signal (control information).

I will explain with another example. In the mobile communication system shown in FIG. 4, the base station apparatus uses the PDSCH of each of the five downlink carrier elements DCC-0, DCC-1, DCC-2, DCC-3, and DCC-4 to transmit the downlink. Send a transport block. That is, the base station apparatus allocates five PDSCH resources to transmit downlink transport blocks. Further, the base station apparatus uses DCC-0 to use an uplink transmission permission signal including information indicating “2” as information indicating the number of PDSCHs allocated in the same subframe, and DCC-2. Then, an uplink transmission permission signal including information indicating “3” is transmitted as information indicating the number of PDSCHs allocated in the same subframe. At this time, the base station apparatus can perform transmission of the uplink transmission permission signal using DCC-0 and transmission of the uplink transmission permission signal using DCC-2 in the same subframe. The mobile station apparatus transmits information indicating the number of allocated PDSCH included in two uplink transmission permission signals transmitted in the same subframe from the base station apparatus (in this case, information indicating “2” and “3”). Information indicating HARQ ACK / NACK for the two downlink transport blocks using the USCH-0 PUSCH, and indicating HARQ ACK / NACK for the three downlink transport blocks Information is transmitted using the PUSCH of UCC-1. Here, when the mobile station device transmits information indicating HARQ ACK / NACK for two downlink transport blocks and three downlink transport blocks, for example, two downlink transport blocks Information indicating HARQ ACK / NACK for 3 and information indicating HARQ ACK / NACK for 3 downlink transport blocks are respectively bundled (bundle) or multiplexed. Can be sent.

I will explain with another example. In the mobile communication system shown in FIG. 4, the base station apparatus uses the PDSCH of each of the five downlink carrier elements DCC-0, DCC-1, DCC-2, DCC-3, and DCC-4 to transmit the downlink. Send a transport block. That is, the base station apparatus allocates five PDSCH resources to transmit downlink transport blocks. Further, the base station apparatus uses DCC-0 to use an uplink transmission permission signal including information indicating “5” as information indicating the number of PDSCHs allocated in the same subframe, and DCC-2. Then, an uplink transmission permission signal including information indicating “5” is transmitted as information indicating the number of PDSCHs allocated in the same subframe. At this time, the base station apparatus can perform transmission of the uplink transmission permission signal using DCC-0 and transmission of the uplink transmission permission signal using DCC-2 in the same subframe. The mobile station apparatus transmits information indicating the number of assigned PDSCH included in two uplink transmission permission signals transmitted in the same subframe from the base station apparatus (here, information indicating “5” and “5”). Information indicating the HARQ ACK / NACK for the five downlink transport blocks according to the information shown) and using the PUSCH of UCC-0 to indicate the HARQ ACK / NACK for the five downlink transport blocks. Information is transmitted using the PUSCH of UCC-2. That is, HARQ ACK / NACK for the downlink transport block transmitted using UCC-0 PUSCH and UCC-2 PUSCH is the same (repeated). Here, the mobile station apparatus transmits HARQ ACK / NACK information for five downlink transport blocks using UCC-0 and five downlink transport blocks using UCC-2. For example, information indicating HARQ ACK / NACK for five downlink transport blocks transmitted using UCC-0, and for five downlink transport blocks transmitted using UCC-2 Information indicating HARQ ACK / NACK can be transmitted in bundles (bundles) or multiplexed.

Similarly, FIG. 5 shows that as an example for explaining the first embodiment, a DL system band (for example, a frequency band having a bandwidth of 100 MHz) includes two downlink carrier element groups. (DCCG-0 and DCCG-1, for example, downlink carrier element groups each having a bandwidth of 40 MHz and 60 MHz are shown.). Further, a carrier element group (DCCG-0) having a bandwidth of 40 MHz is divided into two downlink carrier elements (DCC-0 and DCC-1, for example, a downlink having a bandwidth of 20 MHz each. The carrier element group (DCCG-1) having a bandwidth of 60 MHz is composed of three downlink carrier elements (DCC-2, DCC-3, DCC-4). , As an example, each shows a downlink carrier element having a bandwidth of 20 MHz.). As described above, in the present embodiment, a carrier element (including a plurality of carrier elements (group)) configured by a plurality of carrier elements (groups) is referred to as a carrier element group.

In FIG. 5, each downlink carrier element (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4) (which can also be said to be arranged in each) physical downlink shared channel (PDSCH) ) Is described as DCC-0 PDSCH, DCC-1 PDSCH, DCC-2 PDSCH, DCC-3 PDSCH, DCC-4 PDSCH.

In the mobile communication system shown in FIG. 5, the base station apparatus performs physical downlink shared channels (PDSCH) of downlink carrier elements (DCC-0, DCC-1, DCC-2, DCC-3, DCC-4). Is used to transmit a downlink transport block. In other words, the base station apparatus uses the same subframe to transmit the downlink transport up to the number of downlink carrier elements included in the downlink carrier element group constituting the DL system band (up to 5 in this example). The block can be transmitted to the mobile station device.

FIG. 5 also shows that the UL system band (for example, a frequency band having a bandwidth of 40 MHz) has two uplink carrier elements (UCC-0, UCC-1, for example, Indicates an uplink carrier element having a bandwidth of 20 MHz.). Here, the fact that the DL system band is composed of DCCG-0 and DCCG-1 can also be interpreted as that the DL system band can be divided into DCCG-0 and DCCG-1. Also, the fact that the UL system band is composed of UCC-0 and UCC-1 can be interpreted as being able to divide the UL system band into UCC-0 and UCC-1. Similarly, it can be interpreted that DCCG-0 can be divided into DCC-0 and DCC-1, and DCCG-1 can be divided into DCC-2, DCC-3, and DCC-4.

In the mobile communication system shown in FIG. 5, the base station apparatus and the mobile station apparatus include two downlink carrier element groups (DCCG-0, DCCG-1) and two uplink carrier elements (UCC-0, UCC). -1) are associated with each other (linked), and communication is performed with each of the combinations of downlink carrier element groups and uplink carrier elements associated with each other (linked). That is, a single uplink carrier element and a plurality of downlink carrier elements are associated (linked), and a corresponding (linked) uplink carrier element and a combination of a plurality of downlink carrier elements Each communicates. Here, as a method of associating an uplink carrier element with a plurality of downlink carrier elements, for example, the base station apparatus uses a broadcast channel (BCH) for the mobile station apparatus, and has a cell-specific correspondence relationship. Or a correspondence relationship specific to the mobile station apparatus can be set using a radio resource control signal (RRC signaling). In FIG. 5, as an example, a base station apparatus and a mobile station apparatus have DCCG-0 including DCC-0 and DCC-1 and DCCG-1 including UCC-0, DCC-2, DCC-3 and DCC-4. A state is shown in which UCC-1 is associated with each other (a downlink carrier element group and an uplink carrier element are associated with each other in the direction of increasing frequency). That is, the mobile station apparatus transmits HARQ ACK / NACK for the downlink transport block transmitted from the base station apparatus using DCC-0 and / or DCC-1, using the corresponding UCC-0. Transmit and transmit HARQ ACK / NACK for downlink transport block transmitted using DCC-2 and / or DCC-3 and / or DCC-4 using corresponding UCC-1 .

Here, the base station apparatus can transmit a plurality of uplink transmission permission signals in the same subframe to the mobile station apparatus. That is, in FIG. 5, the base station apparatus assigns the PUSCH resource of UCC-0 to the DCC-2 and / or DCC-3 and / or the DCC-0 and / or DCC-1 using the uplink grant signal. Or, it indicates that the PUSCH resource of UCC-1 is allocated to the mobile station apparatus in the same subframe by the uplink grant signal transmitted using DCC-4.

As described above, in the first embodiment, the base station apparatus transmits a downlink transport block using a physical downlink shared channel, and a plurality of downlinks corresponding to one uplink carrier element. Information indicating the number of physical downlink shared channels allocated in the same subframe within the carrier element is included in the uplink transmission permission signal, and the mobile station apparatus transmits one uplink included in the uplink permission signal. Indicates HARQ ACK / NACK for a downlink transport block according to information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to the carrier element of Send information.

* A specific example will be described. In the mobile communication system shown in FIG. 5, the base station apparatus uses the PDSCH of each of the five downlink carrier elements DCC-0, DCC-1, DCC-2, DCC-3, and DCC-4 to transmit the downlink. Send a transport block. That is, the base station apparatus allocates five PDSCH resources to transmit downlink transport blocks. Further, the base station apparatus can display “number of PDSCHs assigned by a plurality of downlink carrier elements (DCC-0, DCC-1) corresponding to one uplink carrier element (UCC-0) as“ An uplink transmission permission signal including information indicating 2 ”(in this case, information indicating the total number“ 2 ”of PDSCH allocated by DCC-0 and DCC-1) is transmitted as DCC-0 and / or DCC-1 Use to send. Similarly, the base station apparatus counts the number of PDSCHs allocated by a plurality of downlink carrier elements (DCC-2, DCC-3, DCC-4) corresponding to one uplink carrier element (UCC-1). An uplink transmission permission signal including information indicating “3” (in this case, information indicating the total number of PDSCHs “3” allocated by DCC-2, DCC-3, and DCC-4), Transmit using DCC-2 and / or DCC-3 and / or DCC-4. Here, the base station apparatus uses an uplink transmission permission signal using DCC-0 and / or DCC-1 and an uplink transmission permission signal using DCC-2 and / or DCC-3 and / or DCC-4. Can be transmitted in the same subframe.

The mobile station apparatus transmits information (here, “2”) indicating the number of allocated PDSCH included in the uplink transmission permission signal transmitted from the base station apparatus using DCC-0 and / or DCC-1. Information indicating HARQ ACK / NACK for two downlink transport blocks is transmitted using the PUSCH of UCC-0. Here, when the mobile station apparatus transmits information indicating HARQ ACK / NACK for two downlink transport blocks, for example, information indicating HARQ ACK / NACK for two downlink transport blocks Can be sent in bundles (bundles) or multiplexed.

Further, the mobile station apparatus information indicating the number of allocated PDSCH included in the uplink transmission permission signal transmitted from the base station apparatus using DCC-2 and / or DCC-3 and / or DCC-4 According to (here, information indicating “3”), information indicating HARQ ACK / NACK for the three downlink transport blocks is transmitted using the PUSCH of UCC-1. Here, when the mobile station apparatus transmits information indicating HARQ ACK / NACK for three downlink transport blocks, for example, information indicating HARQ ACK / NACK for three downlink transport blocks Can be sent in bundles (bundles) or multiplexed. In addition, the mobile station apparatus may perform transmission of information indicating HARQ ACK / NACK using UCC-0 and transmission of information indicating HARQ ACK / NACK using UCC-1 in the same subframe. it can.

Here, as described above, the base station apparatus and the mobile station apparatus each perform an uplink carrier element (UCC-0, UCC-1) and a carrier element group (DCCG-) including a plurality of downlink carrier elements. 0, DCCG-1) are mutually associated (linked), and the mobile station apparatus transmits / receives information indicating HARQ ACK / NACK to the downlink transport block, so that the mobile station apparatus A bundling window (bundling window) or a multiplexing window (multiplexing window) when transmitting information indicating HARQ ACK / NACK can be limited. That is, the base station apparatus sets the correspondence relationship between the uplink carrier element and the downlink carrier element group using a broadcast channel (BCH) or a radio resource control signal (RRC signaling), whereby the mobile station When a device transmits information indicating ACK / NACK of HARQ, it is possible to bundle (bundle) or change (limit) the number of PDSCHs to be multiplexed (multiplexing), Transmitting and receiving information indicating HARQ ACK / NACK that is robust (robust) against changes in propagation path conditions, using each uplink carrier element (UCC-0, UCC-1) efficiently Can do. Further, the base station apparatus transmits information indicating the number of PDSCHs transmitted in the downlink carrier element group to the uplink transmission permission signal (information indicating the number of PDSCHs transmitted in the limited downlink carrier element). ), And the amount of information indicating the number of allocated PDSCH included in the uplink transmission permission signal can be reduced.

I will explain with another example. In the mobile communication system shown in FIG. 5, the base station apparatus transmits a downlink transport block using PDSCH of each of the three downlink carrier elements DCC-0, DCC-2, and DCC-4. That is, the base station apparatus allocates three PDSCH resources to transmit downlink transport blocks. Further, the base station apparatus can display “number of PDSCHs assigned by a plurality of downlink carrier elements (DCC-0, DCC-1) corresponding to one uplink carrier element (UCC-0) as“ An uplink transmission permission signal including information indicating 1 ″ is transmitted using DCC-0 and / or DCC-1. Similarly, the base station apparatus has information indicating the number of PDSCHs allocated by a plurality of downlink carrier elements (DCC-2, DCC-4) corresponding to one uplink carrier element (UCC-1). An uplink transmission permission signal including information indicating “2” is transmitted using DCC-2 and / or DCC-3 and / or DCC-4. Here, the base station apparatus uses an uplink transmission permission signal using DCC-0 and / or DCC-1 and an uplink transmission permission signal using DCC-2 and / or DCC-3 and / or DCC-4. Can be transmitted in the same subframe.

The mobile station apparatus transmits information (here, “1”) indicating the number of allocated PDSCH included in the uplink transmission permission signal transmitted from the base station apparatus using DCC-0 and / or DCC-1. Information indicating HARQ ACK / NACK for one downlink transport block is transmitted using the PUSCH of UCC-0. That is, the mobile station apparatus transmits information indicating ACK / NACK of HARQ for the downlink transport block transmitted using DCC-0, using PUSCH of UCC-0. Here, the mobile station apparatus transmits a downlink transport block (here, one downlink transmitted by DCC-0) using any one of the carrier elements included in the downlink carrier element group. When transmitting information indicating HARQ ACK / NACK for a transport block), for example, information indicating HARQ ACK / NACK for one downlink transport block is bundled (bundle). Or multiplexed and transmitted.

Further, the mobile station apparatus information indicating the number of allocated PDSCH included in the uplink transmission permission signal transmitted from the base station apparatus using DCC-2 and / or DCC-3 and / or DCC-4 According to (here, information indicating “2”), information indicating HARQ ACK / NACK for two downlink transport blocks is transmitted using PUSCH of UCC-1. That is, the mobile station apparatus transmits information indicating HARQ ACK / NACK for the downlink transport block transmitted using the PDSCH of DCC-2 and DCC-4 using the PUSCH of UCC-1. It will be. Here, the mobile station apparatus transmits a downlink transport block (here, 2 transmitted by DCC-2 and DCC-4) using any one of the carrier elements included in the downlink carrier element group. For example, when transmitting information indicating HARQ ACK / NACK for two downlink transport blocks), information indicating HARQ ACK / NACK for two downlink transport blocks is bundled (bundle). It can be transmitted in a lump or multiplexed. In addition, the mobile station apparatus may perform transmission of information indicating HARQ ACK / NACK using UCC-0 and transmission of information indicating HARQ ACK / NACK using UCC-1 in the same subframe. it can.

As described above, in the mobile station communication system according to the first embodiment of the present invention, the base station apparatus and the mobile station apparatus perform communication using a wide frequency band constituted by carrier elements. Then, the base station apparatus transmits information indicating the number of PDSCHs allocated in the same subframe in the uplink transmission permission signal, and the mobile station apparatus allocates information in the same subframe included in the uplink transmission permission signal. Even if the mobile station apparatus cannot detect the downlink transport block by transmitting information indicating the HARQ ACK / NACK for the downlink transport block according to the information indicating the number of PDSCHs received, the base station HAR for downlink transport block exchanged between station apparatus and mobile station apparatus It is possible to correctly receive the information indicating the ACK / NACK. That is, when the base station apparatus transmits information indicating the number of PDSCHs allocated in the same subframe in the uplink transmission permission signal, the mobile station apparatus uses the PDSCH in the same subframe from the base station apparatus. The number of downlink transport blocks transmitted in this way can be accurately confirmed (recognized), and HARQ ACKs for the correct number of downlink transport blocks (the base station apparatus is supposed to be transmitted) Information indicating / NACK can be transmitted.

In addition, the base station apparatus transmits information including the number of PDSCHs allocated in the same subframe in the uplink transmission permission signal, so that the mobile station apparatus instructs PDSCH resource allocation. Even when a channel (PDCCH) cannot be detected, it is possible to transmit information indicating HARQ ACK / NACK for the correct number of downlink transport blocks (which the base station apparatus is supposed to transmit). .

Further, in the mobile station communication system according to the first embodiment of the present invention, the base station apparatus is the same in a plurality of downlink carrier elements (downlink carrier element groups) corresponding to one uplink carrier element. Information indicating the number of PDSCHs allocated in the subframe is included in the uplink transmission permission signal and transmitted, and the mobile station apparatus has a plurality of downlinks corresponding to one uplink carrier element included in the uplink permission signal. Mobile station apparatus by transmitting information indicating HARQ ACK / NACK for the downlink transport block according to information indicating the number of physical downlink shared channels allocated in the same subframe within the carrier element of Even if the downlink transport block is not detected It is possible to correctly receive the information indicating the ACK / NACK of HARQ for the downlink transport block to be exchanged between the base station apparatus and the mobile station apparatus. Base station apparatus and mobile station apparatus mutually correspond to carrier element groups (DCCG-0, DCCG-1) each including uplink carrier elements (UCC-0, UCC-1) and a plurality of downlink carrier elements The mobile station apparatus transmits information indicating HARQ ACK / NACK for the downlink transport block by transmitting and receiving information indicating HARQ ACK / NACK for the downlink transport block. Bundling window (bundling window) or multiplexing window (multiplexing 可能 window) can be limited, and each of the uplink carrier elements (UCC-0, UCC-1) is used efficiently. Robust HARQ ACK / NAC against changes in road conditions Capable of transmitting and receiving information indicating a. In addition, the base station apparatus only needs to transmit information indicating the number of PDSCHs transmitted in the limited downlink carrier element, and the information indicating the number of allocated PDSCHs included in the uplink transmission permission signal. The amount of information can be reduced.

As described above, according to the embodiment of the present invention, the mobile communication system includes a base station apparatus and a mobile station apparatus, and the base station apparatus uses a physical downlink shared channel. Transmitting a downlink transport block to the mobile station apparatus, transmitting information indicating the number of physical downlink shared channels allocated in the same subframe to an uplink transmission permission signal to the mobile station apparatus, The mobile station apparatus, according to information indicating the number of physical downlink shared channels allocated in the same subframe included in the uplink grant signal, information indicating ACK / NACK of HARQ for the downlink transport block A mobile communication system for transmitting to the base station apparatus is provided.

Further, the mobile communication system includes a base station device and a mobile station device, wherein the base station device transmits a downlink transport block to the mobile station device using a physical downlink shared channel, Information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element is included in an uplink transmission permission signal and transmitted to the mobile station apparatus Then, the mobile station apparatus determines the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element included in the uplink grant signal. In response to the information indicated, HARQ ACK / for the downlink transport block Mobile communication system for transmitting information indicating the ACK to the base station apparatus is provided.

Further, a base station apparatus in a mobile communication system composed of a base station apparatus and a mobile station apparatus, and means for transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel, There is provided a base station apparatus comprising: means for including information indicating the number of physical downlink shared channels allocated in the same subframe in an uplink transmission permission signal and transmitting the information to the mobile station apparatus.

Further, a mobile station apparatus in a mobile communication system composed of a base station apparatus and a mobile station apparatus, and means for receiving a downlink transport block from the base station apparatus using a physical downlink shared channel; Means for receiving an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe from the base station device, and allocated in the same subframe included in the uplink permission signal Means for transmitting HARQ ACK / NACK information for the downlink transport block to the base station apparatus according to information indicating the number of physical downlink shared channels is provided. .

Further, a base station apparatus in a mobile communication system composed of a base station apparatus and a mobile station apparatus, the means for transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel, Information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element is included in an uplink transmission permission signal and transmitted to the mobile station apparatus And a base station apparatus comprising:

Further, a mobile station apparatus in a mobile communication system composed of a base station apparatus and a mobile station apparatus, wherein means for receiving a downlink transport block from the base station apparatus using a physical downlink shared channel, An uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element is received from the base station apparatus And information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink carrier elements corresponding to one uplink carrier element included in the uplink grant signal , HARQ ACK / for the downlink transport block Mobile station apparatus is provided comprising means for transmitting information indicating the ACK to the base station apparatus.

In the embodiment described above, each function in the base station device and a program for realizing each function in the mobile station device are recorded in a computer-readable recording medium, and the program recorded in this recording medium is recorded. The base station apparatus and the mobile station apparatus may be controlled by being read and executed by a computer system. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it is also assumed that a server that holds a program for a certain time, such as a volatile memory inside a computer system that serves as a server or client. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

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 the design and the like within the scope of the present invention are also within the scope of the claims. include.

The present invention is suitable for use in a mobile phone system using a mobile phone terminal as a mobile station device, but is not limited thereto.

DESCRIPTION OF SYMBOLS 100 Base station apparatus 101 Data control part 102 Transmission data modulation part 103 Radio | wireless part 104 Scheduling part 105 Channel estimation part 106 Reception data demodulation part 107 Data extraction part 108 Upper layer 109 Antenna 110 Radio | wireless resource control part 200 Mobile station apparatus 201 Data control part 202 Transmission Data Modulation Unit 203 Radio Unit 204 Scheduling Unit 205 Channel Estimation Unit 206 Reception Data Demodulation Unit 207 Data Extraction Unit 208 Upper Layer 209 Antenna 210 Radio Resource Control Unit

Claims

A base station apparatus and a mobile station apparatus are mobile communication systems that perform communication by aggregating a plurality of component carriers,
The base station device
Transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel;
Transmitting an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe to the mobile station device;
The mobile station device
In response to information indicating the number of physical downlink shared channels, information indicating ACK (acknowledgement) / NACK (negative acknowledgment) of HARQ (hybrid automatic retransmission request) for the downlink transport block is transmitted to the base station apparatus. A mobile communication system characterized by transmitting.
A base station apparatus and a mobile station apparatus are mobile communication systems that perform communication by aggregating a plurality of component carriers,
The base station device
Transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel;
Transmitting an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe in a plurality of downlink component carriers corresponding to one uplink component carrier to the mobile station device;
The mobile station device
A mobile communication system, wherein information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus according to information indicating the number of physical downlink shared channels.
The mobile station device
Information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus using a physical uplink shared channel resource allocated by the uplink transmission permission signal. The mobile communication system according to claim 1 or 2.
A base station apparatus and a mobile station apparatus are base station apparatuses in a mobile communication system that performs communication by aggregating a plurality of component carriers,
Means for transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel;
Means for transmitting an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe to the mobile station device;
A base station apparatus comprising:
A base station apparatus and a mobile station apparatus are base station apparatuses in a mobile communication system that performs communication by aggregating a plurality of component carriers,
Means for transmitting a downlink transport block to the mobile station apparatus using a physical downlink shared channel;
Means for transmitting to the mobile station apparatus an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe within a plurality of downlink component carriers corresponding to one uplink component carrier; ,
A base station apparatus comprising:
A base station apparatus and a mobile station apparatus are mobile station apparatuses in a mobile communication system that performs communication by aggregating a plurality of component carriers,
Means for receiving a downlink transport block from the base station apparatus using a physical downlink shared channel;
Means for receiving, from the base station apparatus, an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated by the base station apparatus in the same subframe;
Means for transmitting information indicating HARQ ACK / NACK for the downlink transport block to the base station apparatus according to information indicating the number of physical downlink shared channels;
A mobile station apparatus comprising:
A base station apparatus and a mobile station apparatus are mobile station apparatuses in a mobile communication system that performs communication by aggregating a plurality of component carriers,
Means for receiving a downlink transport block from the base station apparatus using a physical downlink shared channel;
The base station apparatus transmits an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe in a plurality of downlink component carriers corresponding to one uplink component carrier. Means for receiving from the device;
Means for transmitting information indicating HARQ ACK / NACK for the downlink transport block to the base station apparatus according to information indicating the number of physical downlink shared channels;
A mobile station apparatus comprising:
Means for transmitting information indicating ACK / NACK of HARQ for the downlink transport block to the base station apparatus,
Information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus using a physical uplink shared channel resource allocated by the uplink transmission permission signal. The mobile station apparatus according to claim 6 or 7.
A mobile station apparatus communication method in a mobile communication system in which a base station apparatus and a mobile station apparatus perform communication by aggregating a plurality of component carriers,
Receiving a downlink transport block from the base station apparatus using a physical downlink shared channel;
The base station apparatus receives an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe from the base station apparatus,
According to information indicating the number of physical downlink shared channels, information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus.
A mobile station apparatus communication method in a mobile communication system in which a base station apparatus and a mobile station apparatus perform communication by aggregating a plurality of component carriers,
Receiving a downlink transport block from the base station apparatus using a physical downlink shared channel;
The base station apparatus transmits an uplink transmission permission signal including information indicating the number of physical downlink shared channels allocated in the same subframe in a plurality of downlink component carriers corresponding to one uplink component carrier. Received from the device,
In response to information indicating the number of physical downlink shared channels, information indicating HARQ ACK / NACK for the downlink transport block is transmitted to the base station apparatus.
A communication method characterized by the above.