WO2010122722A1 - 無線通信システム、通信装置、通信方法、及び通信プログラム - Google Patents
無線通信システム、通信装置、通信方法、及び通信プログラム Download PDFInfo
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- WO2010122722A1 WO2010122722A1 PCT/JP2010/002556 JP2010002556W WO2010122722A1 WO 2010122722 A1 WO2010122722 A1 WO 2010122722A1 JP 2010002556 W JP2010002556 W JP 2010002556W WO 2010122722 A1 WO2010122722 A1 WO 2010122722A1
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- control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a wireless communication system, a communication device, a communication method, and a communication program.
- LTE Long Term Evolution
- EUTRA Evolved Universal Terrestrial Radio Access
- LTE-A Long Term Evolution-Advanced
- A-EUTRA Advanced Advanced Universal Access
- an Orthogonal Frequency Division Multiplexing (OFDM) scheme that is multicarrier transmission is used as a downlink.
- a discrete carrier transform (DFT) -Spread OFDM single carrier communication scheme, which is single carrier transmission, is used as the uplink.
- DFT discrete carrier transform
- a broadcast channel Physical Broadcast Channel; PBCH
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- PMCH Multicast Channel
- Control Format Indicator Channel Physical Control Format Indicator Channel, HQ, PQCHH at Request Indicator Channel; PHICH
- an uplink shared channel (PUSCH: Physical Up Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH) : Physical Random Access Channel).
- PUSCH Physical Up Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH random access channel
- LTE-A has compatibility with LTE, that is, the base station apparatus of LTE-A performs radio communication simultaneously with both mobile stations of LTE-A and LTE, and LTE-A A mobile station apparatus A is required to be able to perform radio communication with both LTE-A and LTE base station apparatuses, and the use of the same channel structure as LTE is being studied.
- LTE-A uses a plurality of frequency bands having the same channel structure as LTE (hereinafter referred to as “carrier element (CC)” or “component carrier (CC)”).
- carrier element CC
- CC component carrier
- a broadcast channel, a downlink control channel, a downlink shared channel, a multicast channel, a control format indicator channel, and a HARQ indicator channel are transmitted for each downlink carrier element.
- An uplink shared channel, an uplink control channel, and a random access channel are assigned to each uplink carrier element.
- frequency band aggregation is performed by using uplink control channels, uplink shared channels, downlink control channels, downlink shared channels, etc. in the uplink and downlink, using multiple data and multiple controls. This is a technique for simultaneously transmitting and receiving information (see Non-Patent Document 1 Chapter 5).
- Non-Patent Document 2 when an uplink shared channel for a certain mobile station apparatus is allocated to any one of the uplink carrier elements, all the mobile station apparatuses are Is described in which uplink control information (Uplink Control Information; UCI) is placed in an uplink shared channel and transmitted.
- UCI Uplink Control Information
- the base station apparatus allocates an uplink shared channel to a plurality of uplink carrier elements, for example, for a mobile station apparatus with a large communication volume.
- the base station apparatus when allocating uplink shared channels of a plurality of uplink carrier elements to the mobile station apparatus, if all uplink control information is allocated to all the plurality of uplink carrier elements one by one, radio resources to which data information is allocated There was a disadvantage that would decrease.
- the base station apparatus cannot determine in which uplink shared channel the uplink control information is arranged, and the information of the information arranged in the uplink shared channel cannot be determined. There was a drawback that the type was wrong.
- the present invention has been made in view of the above points, and provides a wireless communication system, a communication apparatus, a communication method, and a communication program capable of reliably communicating information.
- the present invention has been made to solve the above-described problems.
- the present invention provides a wireless communication system in which the first communication device and the second communication device perform wireless communication.
- An apparatus allocates a plurality of radio resources for a plurality of transport blocks to the first communication apparatus, and the first communication apparatus allocates the allocated radio resources when uplink control information needs to be transmitted.
- the uplink control information is arranged and transmitted in one radio resource among a plurality of radio resources, and the second communication device extracts the uplink control information arranged in the one radio resource.
- a wireless communication system is characterized. According to the above configuration, the wireless communication system can reliably communicate information.
- the second communication device selects one wireless resource in which the uplink control information is arranged, and notifies the first communication device It is a radio resource of a carrier.
- one wireless resource in which the uplink control information is arranged is based on downlink control information for each wireless resource notified from the second communication device. And selected by the first communication device.
- the present invention is characterized in that, in the above wireless communication system, the downlink control information includes information on a modulation scheme.
- the present invention is characterized in that, in the above wireless communication system, the downlink control information includes information on a coding rate.
- the present invention is characterized in that, in the above-described radio communication system, the downlink control information includes information on a radio resource amount.
- the present invention is characterized in that, in the above wireless communication system, the downlink control information includes information on the amount of transport blocks.
- one radio resource in which the uplink control information is arranged is selected by the first communication device based on a frequency height of the radio resource. It is characterized by being.
- the uplink control information is arranged and transmitted in one radio resource.
- a plurality of wireless resources are allocated to the first communication device, and the first communication device includes the allocation
- the second communication apparatus is characterized by receiving and extracting uplink control information arranged and transmitted in one of the plurality of radio resources.
- the present invention provides a method in which the first communication device needs to transmit uplink control information.
- a communication method comprising a step of arranging and transmitting the uplink control information in one radio resource among a plurality of radio resources allocated to the second communication apparatus.
- the second communication device allocates a plurality of wireless resources to the first communication device. And a process in which the second communication device receives and extracts uplink control information transmitted from the first communication device arranged in one of the allocated radio resources in one radio resource. And a communication method characterized by comprising:
- the computer of the first communication device that performs wireless communication with the second communication device is assigned to the second communication device when it is necessary to transmit uplink control information.
- a communication program that functions as means for arranging and transmitting the uplink control information in one radio resource among a plurality of radio resources.
- the first communication device in the communication method in the second communication device that performs wireless communication with the first communication device, means for allocating a plurality of wireless resources to the first communication device, the first communication device Is a communication program that functions as means for receiving and extracting uplink control information that is arranged and transmitted in one of the plurality of allocated radio resources.
- the wireless communication system can reliably communicate information.
- FIG. 1 is a conceptual diagram of a wireless communication system according to a first embodiment of the present invention. It is a figure which shows an example of the frequency band aggregation process which concerns on this embodiment. It is the schematic which shows an example of a structure of the uplink radio frame which concerns on this embodiment. It is the schematic which shows an example of arrangement
- FIG. 1 is a conceptual diagram of a radio communication system according to the first embodiment of the present invention.
- the radio communication system includes mobile station apparatuses A1 to A3 (first communication apparatus) and a base station apparatus B1 (second communication apparatus).
- the mobile station devices A1 to A3 and the base station device B1 perform communication using frequency band aggregation described later.
- FIG. 1 shows a downlink pilot channel (also referred to as a “downlink reference signal (DL RS)”) in radio communication (downlink) from the base station apparatus B1 to the mobile station apparatuses A1 to A3.
- DL RS downlink reference signal
- FIG. 1 is also referred to as an uplink pilot channel (or “Uplink Reference Signal (UL RS)” in radio communication (uplink) from the mobile station apparatuses A1 to A3 to the base station apparatus B1.
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Channel
- PDSCH Physical Downlink Channel control
- HARQ indicator channel Physical Hybrid ARQ Indicator Channel.
- FIG. 1 is also referred to as an uplink pilot channel (or “Uplink Reference Signal (UL RS)” in radio communication (uplink) from the mobile station apparatuses A1 to A3 to the base station apparatus B1.
- UL RS Uplink Reference Signal
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- PRACH Physical Random Access
- FIG. 2 is a diagram illustrating an example of the frequency band aggregation processing according to the present embodiment.
- the horizontal axis represents the frequency domain
- the vertical axis represents the time domain.
- the downlink subframe D1 is configured by subframes of three carrier elements (DCC-0: Downlink Component Carrier-0, DCC-1, and DCC-2) having a bandwidth of 20 MHz. Has been.
- DCC-0 Downlink Component Carrier-0, DCC-1, and DCC-2
- a downlink control channel indicated by a hatched area and a downlink shared channel indicated by a non-hatched area are time-multiplexed. Assigned.
- the uplink subframe U1 is configured by three carrier elements (UCC-0: Uplink Component Carrier-0, UCC-1, and UCC-2) having a bandwidth of 20 MHz.
- UCC-0 Uplink Component Carrier-0, UCC-1, and UCC-2
- an uplink control channel indicated by a hatched area with diagonal grid lines, and an uplink shared channel indicated by a hatched area on the left diagonal line Are frequency-multiplexed and assigned.
- the base station apparatus b1 arranges a signal in a downlink shared channel of one or a plurality of downlink carrier elements among three downlink carrier elements in a certain subframe, and transmits the signal to the mobile station apparatus a1.
- the mobile station apparatus a1 arranges a signal in an uplink shared channel of one or a plurality of uplink carrier elements among three uplink carrier elements in a certain subframe, and transmits the signal to the base station apparatus b1.
- FIG. 3 is a schematic diagram illustrating an example of a configuration of an uplink radio frame according to the present embodiment.
- FIG. 3 shows a configuration of a radio frame in a certain uplink carrier element.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- the radio frame of the uplink carrier element is composed of a plurality of physical resource block (PRB) pairs (for example, a region surrounded by a broken line with a symbol RB).
- PRB physical resource block
- One physical resource block pair is composed of two physical resource blocks (PRB bandwidth ⁇ slot) that are continuous in the time domain.
- One physical resource block (unit surrounded by a thick line in FIG. 3) is composed of 12 subcarriers in the frequency domain, and is composed of 7 DFT-Spread OFDM symbols in the time domain.
- a slot composed of 7 DFT-Spread OFDM symbols, a subframe composed of 2 slots, and a radio frame composed of 10 subframes.
- a plurality of physical resource blocks (PRBs) are arranged according to the bandwidth of the uplink carrier element.
- a unit composed of one subcarrier and one DFT-Spread OFDM symbol is referred to as a resource element (RE).
- an uplink control channel for example, an uplink control channel, an uplink shared channel, and an uplink pilot channel used for channel estimation of the uplink control channel and the uplink shared channel are allocated.
- the uplink control channel is allocated to physical resource block pairs (regions hatched with left diagonal lines) at both ends of the bandwidth of the uplink carrier element. Physical resource block pairs (areas not hatched) other than the uplink control channel are allocated to the uplink shared channel. Note that the mobile station device a1 does not place data in both the uplink control channel and the uplink shared channel in one subframe.
- An uplink pilot channel (not shown) is time-multiplexed and allocated to the uplink shared channel and the uplink control channel.
- uplink which is information used for communication control, such as channel quality information, scheduling request (SR: Scheduling Request), ACK (ACKnowledgement; Acknowledgment) / NACK (Negative-ACKnowledgement; Negative response)
- SR Scheduling Request
- ACK acknowledgement
- Acknowledgment Acknowledgment
- NACK Negative-ACKnowledgement
- UCI Uplink Control Information
- the channel quality information is information indicating the transmission quality of the downlink channel measured by the mobile station apparatus a1 using the downlink reference signal.
- the scheduling request is information for requesting the mobile station apparatus a1 to allocate uplink radio resources to the base station apparatus b1.
- ACK / NACK is information indicating success or failure of decoding of the downlink shared channel received by the mobile station apparatus.
- the channel quality information includes CQI (Channel Quality Indicator), RI (Rank Indicator), and PMI (Precoding Matrix Indicator).
- CQI is information indicating channel quality for changing radio transmission parameters such as an error correction scheme of a downlink channel, an error correction coding rate, and a data modulation multi-level number.
- the RI is information required by the mobile station device a1 when performing spatial multiplexing transmission in the downlink using the MIMO (Multiple Input Multiple Output) method, and is a signal sequence unit (stream) for preprocessing a transmission signal sequence in advance.
- Is information (Rank).
- the PMI is information that the mobile station apparatus a1 requests when performing spatial multiplexing transmission using the MIMO scheme, and is precoding information for preprocessing a transmission signal sequence in advance.
- a signal arranged in the uplink shared channel will be described.
- a signal (referred to as a data signal) of data information (transport block) which is information other than uplink control information is arranged.
- an uplink control information signal (referred to as an uplink control signal) is also arranged in the uplink shared channel.
- an uplink control signal (referred to as an uplink control signal) is also arranged in the uplink shared channel.
- FIG. 4 is a schematic diagram illustrating an example of the arrangement of uplink control signals in the uplink shared channel according to the present embodiment.
- FIG. 4 (A) is a diagram showing mapping of uplink control signals
- FIG. 4 (B) is a diagram showing arrangement of uplink control signals in the uplink shared channel.
- FIG. 4B shows one of the uplink shared channels of the uplink carrier element allocated to the mobile station device a1 in a certain subframe, and two physical resource blocks as the uplink shared channel. Indicates when a pair is assigned.
- the vertical axis indicates the time domain, and each column is a unit interval (DFT interval) for performing DFT.
- the horizontal axis indicates the DFT section number, which is a number assigned in order of time.
- the area is divided into the number of uplink shared channel DFT-Spread OFDM symbols that can be transmitted in a subframe after DFT (12 in the example of FIG. 4B).
- the number of subcarriers allocated in the subframe is divided into 24 regions (24 in the example of FIG. 4B), and modulation symbols are arranged. Indicates.
- a hatched area with diagonal grid lines indicates an area in which ACK / NACK modulation symbols are arranged.
- the ACK / NACK modulation symbols are the third and fourth, ninth, and tenth areas in the direction from the smallest DFT section number to the largest DFT section number. It is arranged in six regions continuously in the direction.
- the area hatched with a right oblique line is an area where RI modulation symbols are arranged.
- the RI modulation symbols are the second and fifth, eighth and eleventh areas in the direction in which the DFT section number increases from the area having the smallest DFT section number, and the time decreases from the area having the largest time. It is arranged in 6 areas continuously.
- a hatched area with a left oblique line indicates an area where CQI or PMI modulation symbols are arranged.
- CQI or PMI modulation symbols are arranged in order from the region having the smallest DFT section number in the direction where the DFT section number increases in the region having the smallest time.
- the CQI or PMI modulation symbol is the DFT section number in the area where the time is next to the time area (row) where the CQI or PMI modulation symbol is arranged.
- the DFT section numbers are arranged in order from the smallest area in the increasing direction.
- 4A repeats the same arrangement, and is the fourth area from the smallest time area in the direction of increasing time, and the fourth area from the smallest DFT section number to the direction of increasing DFT section number. It indicates that CQI or PMI modulation symbols are arranged up to the 10th region.
- an unhatched area indicates an area where modulation symbols of data information are arranged.
- Data information modulation symbols are arranged in the same manner as CQI and PMI modulation symbols after all CQI and PMI modulation symbols are arranged. However, after the data modulation symbols are arranged, some data modulation symbols are overwritten with ACK / NACK and RI modulation symbols.
- the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
- a hatched area with a right oblique line indicates a symbol arranged in the uplink shared channel
- a hatched area with a dot indicates an uplink reference signal.
- the symbol arranged in the uplink shared channel is a symbol obtained by performing discrete Fourier transform (DFT) on the modulation symbol arranged as shown in FIG.
- DFT discrete Fourier transform
- the modulation symbols in FIG. 4 (A) are discrete Fourier transformed in order from the time domain (column) with the smaller DFT interval number, and the discrete Fourier transformed frequency domain symbols are converted.
- the time is arranged in ascending order.
- FIG. 5 is a schematic block diagram showing the configuration of the mobile station apparatus according to this embodiment.
- the mobile station device a1 includes an upper layer processing unit a11, a control unit a12, a reception processing unit a13, a plurality of reception antennas, a transmission processing unit a14, and a plurality of transmission antennas.
- the upper layer processing unit a11 includes a radio resource control unit a111.
- the receiving antenna and the transmitting antenna are configured differently, but the antenna may be shared by using a thyristor or the like that switches the input / output of a signal.
- the upper layer processing unit a11 outputs data information for each uplink carrier element generated by a user operation or the like to the transmission processing unit a14.
- the upper layer processing unit a11 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.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- RRC Radio Resource Control
- the radio resource control unit a111 included in the upper layer processing unit a11 performs management of various setting information, communication status, buffer status, and the like of the own device. Also, the radio resource control unit a111 generates information to be arranged in each channel of each uplink carrier element, and outputs the information to the transmission processing unit a14 for each uplink carrier element. For example, the radio resource control unit a111 generates ACK / NACK for the downlink shared channel data according to the result of HARQ (Hybrid Automatic Repeat Request) processing, and outputs the generated ACK / NACK to the transmission processing unit a14.
- HARQ Hybrid Automatic Repeat Request
- HARQ is the success / failure of decoding (ACK / NACK) is transmitted to the base station apparatus b1, and when it cannot be decoded due to an error (NACK), the base station apparatus b1 retransmits the signal and has already received the signal received again.
- the radio resource control unit a111 performs control to control the reception processing unit a13 and the transmission processing unit a14 based on the downlink control information (Downlink Control Information) notified from the base station apparatus b1 through the downlink control channel. Information is generated and output to the control unit a12. For example, the radio resource control unit a111 outputs shared channel allocation information indicating an uplink carrier element to which an uplink shared channel for the own device is allocated to the control unit a12. Further, for example, when the signal is arranged on the uplink shared channel, the radio resource control unit a111 reads out mapping information indicating that the mapping illustrated in FIG. 4 is performed from the storage unit (not illustrated), and transmits the mapping information to the control unit a12. Output. This mapping information may be stored in advance when the mobile station apparatus a1 is manufactured or software is updated, or may be stored in advance when notified from the base station apparatus b1.
- This mapping information may be stored in advance when the mobile station apparatus a1 is manufactured or software is updated, or may be stored in advance
- the control unit a12 generates a control signal for controlling the reception processing unit a13 and the transmission processing unit a14 based on the control information from the upper layer processing unit a11.
- a control signal generated based on the shared channel assignment information is referred to as a shared channel assignment information signal.
- the control unit a12 outputs the generated control signal to the reception processing unit a13 and the transmission processing unit a14 to control the reception processing unit a13 and the transmission processing unit a14.
- the reception processing unit a13 demodulates and decodes the reception signal received from the base station apparatus b1 via the reception antenna according to the control signal input from the control unit a12.
- the reception processing unit a13 outputs the decoded information to the upper layer processing unit a11.
- the reception processing unit a13 generates channel quality information (CQI / PMI / RI) based on the detected reception quality of the downlink pilot signal and outputs the channel quality information to the transmission processing unit a14.
- CQI / PMI / RI channel quality information
- the transmission processing unit a14 generates an uplink reference signal according to the control signal from the control unit a12. Also, the transmission processing unit a14 encodes and modulates the data information input from the higher layer processing unit a11, ACK / NACK, and channel quality information input from the reception processing unit a13, and generates a modulation symbol. The transmission processing unit a14 arranges the generated modulation symbols in the uplink shared channel and the uplink control channel, multiplexes with the generated uplink reference signal, and transmits the multiplexed symbol to the base station apparatus b1 via the transmission antenna.
- the transmission processing unit a14 arranges the uplink control information in the uplink shared channel as shown in FIG.
- the transmission processing unit a14 selects an uplink carrier element according to a predetermined arrangement rule, and the selected uplink carrier element Uplink control information is arranged in the uplink shared channel. Details of the transmission processing unit a14 will be described below.
- FIG. 6 is a schematic block diagram showing the configuration of the transmission processing unit a14 of the mobile station apparatus according to this embodiment.
- the transmission processing unit a14 includes an encoding unit a141, a modulation unit a142, a discrete Fourier transform unit a143, an uplink reference signal generation unit a144, a multiplexing unit a145, and a transmission unit a146.
- the encoding unit a141 includes a turbo encoding unit a1411, a CQI / PMI encoding unit a1412, an ACK / NACK encoding unit a1413, an RI encoding unit a1414, a multiplexing switching unit a1415 (carrier element selection unit), and a data / Control information multiplexers a1416 to a1418 are included.
- FIG. 6 is a diagram illustrating a case where communication is performed with the base station apparatus b1 using three uplink carrier elements as illustrated in FIG. Each unit of the transmission processing unit a14 performs processing according to a control signal input from the control unit a12.
- the turbo encoding unit a1411 performs turbo error correction encoding on the data information for each uplink carrier element input from the higher layer processing unit a11 at the encoding rate notified from the base station apparatus b1, and generates encoded bits (data Code bits).
- the turbo encoding unit a1411 outputs the generated data encoded bits for each uplink carrier element to the data / control information multiplexing units a1416 to a1418 corresponding to the uplink carrier element. Note that, when CQI / PMI is multiplexed on the uplink shared channel, the turbo encoding unit a1411 performs turbo error correction encoding so that the encoded bits of data are reduced by the encoded bits of CQI / PMI.
- the CQI / PMI encoding unit a1412 performs error correction encoding on the CQI / PMI input from the reception processing unit a14 based on the shared channel assignment information signal input from the control unit a12, and converts the CQI / PMI encoded bits. Generate.
- the CQI / PMI encoding unit a1412 outputs the generated encoded bits (referred to as CQI / PMI encoded bits) to the multiplex switching unit a1415.
- the ACK / NACK encoding unit a1413 performs error correction encoding on the ACK / NACK input from the higher layer processing unit a1413 based on the shared channel assignment information signal input from the control unit a12, and generates the generated encoded bits (ACK / NACK coded bit) is output to the multiplex switching unit a1415.
- the RI encoding unit a1414 performs error correction encoding on the RI input from the reception processing unit a14 based on the shared channel assignment information signal input from the control unit a12, and generates the generated encoded bits (referred to as RI encoded bits). Is output to the multiple switching unit a1415.
- CQI / PMI encoding unit a1412, ACK / NACK encoding unit a1413, and RI encoding unit a1414 have a shared channel allocation information signal of “9”, that is, no uplink shared channel is allocated to the own device.
- error correction coding switching processing is performed when it is determined that a plurality of uplink shared channels are allocated.
- the CQI / PMI encoding unit a1412, the ACK / NACK encoding unit a1413, and the RI encoding unit a1414 differ depending on whether the encoded bits are transmitted on the uplink control channel or the uplink shared channel. To do.
- Multiplex switching section a1415 based on the shared channel assignment information signal input from control section a12, coding bits input from CQI / PMI encoding section a1412, ACK / NACK encoding section a1413, RI encoding section a1414 Control information arrangement switching processing is performed to switch the output destination.
- the multiplex switching unit a1415 sets the output destination of the encoded bit to the multiplex unit. a145 is determined.
- the output encoded bits are modulated by a modulation unit (not shown), and are allocated to the uplink control channel by the multiplexing unit a145.
- the multiplex switching unit a1415 selects the uplink carrier element number n having the largest value among the uplink carrier element numbers n of the shared channel assignment information signal.
- Multiplex switching section a1415 determines the output destination of the coded bit in one of data / control information multiplexing sections a1416 to a1418 corresponding to the selected uplink carrier element of uplink carrier element number n. That is, the multiplex switching unit a1415 selects a carrier element according to a predetermined rule from a plurality of carrier elements to which radio resources are allocated.
- the multiplex switching unit a1415 outputs the encoded bits to the output destination determined by the above control information arrangement switching process.
- Data / control information multiplexing sections a1416 to a1418 correspond to the uplink carrier elements of uplink carrier element numbers 0 to 2, respectively, and rearrange the encoded bits of the signals arranged in the corresponding uplink carrier elements. Since the functions of the data / control information multiplexing units a1416 to a1418 are the same, one of them (data / control information multiplexing unit a1418) will be described as a representative.
- the data / control information multiplexing unit a1418 rearranges the data encoded bits input from the turbo encoding unit a1411 and the encoded bits input from the multiplexing switching unit a1415 as follows.
- the data / control information multiplexing unit a1418 combines the data coded bit behind the CQI / PMI coded bit.
- the data coded bits are ACK / NACK coded bits and RI coded bits so that the modulation symbols of the ACK / NACK coded bits and the RI coded bits are arranged as shown in FIG. Overwrite.
- the data / control information multiplexing unit a1418 outputs the encoded bits with the rearranged order to the modulation unit a142.
- the data / control information multiplexing unit a1418 does not insert CQI / PMI encoded bits, ACK / NACK encoded bits, and RI encoded bits, and the data Only the encoded bits are output to the modulation unit a142. That is, the data / control information multiplexing unit a1418 arranges the uplink control information in the radio resource of the uplink carrier element selected by the multiplexing switching unit a1415.
- Modulation section a142 performs quadrature phase shift keying (QPSK), 16-value quadrature amplitude modulation on each of the encoded bits of each uplink carrier element input from data / control information multiplexing sections a1416 to a1418. (16 Quadrature Amplitude Modulation; 16QAM), 64-quadrature Amplitude Modulation (64QAM), etc., and the mobile station apparatus a1 modulates in advance with the modulation system notified from the base station apparatus b1, A modulation symbol signal is generated.
- the modulation unit a142 outputs the generated signal of each uplink carrier element to the discrete Fourier transform unit a143.
- Discrete Fourier transform unit a143 rearranges each of the uplink carrier element signals input from modulation unit a142 in parallel as shown in FIG.
- the discrete Fourier transform unit a143 performs a discrete Fourier transform on the signals rearranged in parallel to generate a frequency domain signal.
- the discrete Fourier transform unit a143 outputs the generated signal of each uplink carrier element to the multiplexing unit a145.
- the uplink reference signal generation unit a144 generates a signal sequence of each uplink carrier element and a known sequence signal (uplink reference signal) in the mobile station device a1 and the base station device b1.
- the uplink reference signal is generated based on the mobile station ID that identifies the mobile station device a1 and the base station ID that identifies the base station device b1.
- the uplink reference signal generation unit a144 outputs the generated uplink reference signal to the multiplexing unit a145.
- the multiplexing unit a145 receives the uplink carrier element signal input from the discrete Fourier transform unit a143 and the uplink reference signal input from the uplink reference signal generation unit a145 from the base station apparatus b1. It is arranged in the resource element of the link shared channel (see FIG. 4B). The multiplexing unit a145 outputs the signal of each arranged uplink carrier element to the transmission unit a146. Note that, when a signal obtained by modulating coded bits is input from the multiplexing switching unit a1415, the multiplexing unit a145 places this signal in the uplink control channel.
- the transmission unit a146 performs an inverse fast Fourier transform (IFFT) on the frequency domain signal input from the multiplexing unit a145 to generate a DFT-Spread OFDM symbol.
- IFFT inverse fast Fourier transform
- the DFT-Spread OFDM symbol is obtained by performing a Fourier transform on a time domain signal (performed by the discrete Fourier transform unit a143 in this embodiment) and placing a frequency domain signal on another frequency (in this embodiment, And an OFDM symbol generated by performing an inverse Fourier transform (performed in the present embodiment by the transmitting unit a146).
- the transmission unit a 146 adds a guard interval (GI) to the generated DFT-Spread OFDM symbol, and generates a baseband digital signal.
- GI guard interval
- the transmitter a146 converts the generated digital signal into an analog signal, generates an in-phase component and a quadrature component of an intermediate frequency from the analog signal, removes an extra frequency component with respect to the intermediate frequency band, and converts the intermediate frequency signal to a high frequency
- the signal is converted (up-converted) into the above signal, excess frequency components are removed, power is amplified, and output to each transmission antenna for transmission.
- FIG. 7 is a schematic block diagram showing the configuration of the base station apparatus b1 according to this embodiment.
- the base station device b1 includes an upper layer processing unit b11, a control unit b12, a reception processing unit b13, a plurality of reception antennas, a transmission processing unit b14, and a plurality of transmission antennas.
- the upper layer processing unit b11 includes a radio resource control unit b111.
- the receiving antenna and the transmitting antenna are configured differently, but the antenna may be shared by using a thyristor or the like that has an effect of switching signal input / output.
- the upper layer processing unit b11 outputs data information for each uplink carrier element to the transmission processing unit b14.
- the upper layer processing unit b11 performs processing of the packet data integration protocol layer, the radio link control layer, and the radio resource control layer.
- the upper layer radio resource control unit manages various setting information, communication status, buffer status, and the like of each mobile station device.
- the radio resource control unit b111 included in the higher layer processing unit b11 selects a plurality of uplink carrier elements, and radio resources in each selected uplink carrier element are arranged with uplink control information or data information.
- the radio resource control unit b111 transmits uplink shared channel allocation information indicating the allocation as downlink control information to the mobile station apparatus a1 via the transmission processing unit b14.
- the radio resource control unit b111 manages various setting information, communication status, buffer status, and the like of each mobile station apparatus a1. Further, the radio resource control unit b111 generates information acquired in each channel of each downlink carrier element or acquires it from the network, and outputs the information to the transmission processing unit b14 for each downlink carrier element. For example, the radio resource control unit b111 generates ACK / NACK for the uplink shared channel data according to the result of the HARQ process, and outputs the generated ACK / NACK to the transmission processing unit b14. For example, the radio resource control unit b111 generates downlink control information and outputs the downlink control information to the transmission processing unit b14.
- the radio resource control unit b111 transmits uplink control information (ACK / NACK, channel quality information, scheduling request, and mobile station apparatus a1) notified from the mobile station apparatus a1 through the uplink control channel or the uplink shared channel.
- Control information is generated to control the reception processing unit b13 and the transmission processing unit b14, and is output to the control unit b12.
- the radio resource control unit a111 outputs, to the control unit a12, shared channel allocation information indicating an uplink carrier element to which an uplink shared channel is allocated for each mobile station apparatus a1.
- the radio resource control unit b111 when the radio resource control unit b111 extracts an uplink shared channel signal, the radio resource control unit b111 receives demapping information indicating that demapping is performed in reverse of the mapping illustrated in FIG. 4 from a storage unit (not illustrated). Read and output to the controller b12.
- This demapping information may be stored in advance when the base station device b1 is manufactured, when software is updated, or when updated by an operator's operation, or when it is notified from the mobile station device a1. May be.
- the control unit b12 generates a control signal for controlling the reception processing unit b13 and the transmission processing unit b14 based on the control information from the higher layer processing unit b11.
- the reception processing unit b13 demodulates and decodes the reception signal received from the mobile station apparatus a1 via the reception antenna according to the control signal input from the control unit b12.
- the reception processing unit b13 outputs the decoded information to the upper layer processing unit b11.
- the reception processing unit b13 extracts uplink control information from a received signal received from the mobile station apparatus a1 to which a plurality of uplink shared channels are allocated, according to a predetermined arrangement rule, and performs demodulation and decoding. Do. Details of the reception processing unit b13 will be described later.
- the transmission processing unit b14 generates a downlink reference signal according to the control signal from the control unit b12. Also, the transmission processing unit b14 indicates data information input from the higher layer processing unit b11, downlink control information (for example, uplink shared channel allocation information, radio resource allocation of the downlink shared channel in each downlink carrier element) Downlink shared channel allocation information) is encoded and modulated to generate modulation symbols.
- the transmission processing unit b14 arranges the generated modulation symbol in the downlink shared channel and the downlink control channel, multiplexes with the generated downlink reference signal, and transmits the multiplexed symbol to the mobile station apparatus a1 via the transmission antenna.
- FIG. 8 is a schematic block diagram illustrating a configuration of the reception processing unit b13 of the base station device b1 according to the present embodiment.
- the reception processing unit b13 includes a reception unit b131, a demultiplexing unit b132, a propagation channel estimation unit b133, a propagation channel compensation unit b134, an inverse discrete Fourier transform unit b135, a demodulation unit b136, and a decoding unit b137. Consists of.
- the decoding unit b137 includes data / control information demultiplexing units b1371 to b1373, a turbo decoding unit b1374, a CQI / PMI decoding unit b1375, an ACK / NACK decoding unit b1376, and an RI decoding unit b1377. Composed.
- FIG. 8 is a diagram illustrating a case where communication is performed with the mobile station apparatus a1 using three uplink carrier elements as illustrated in FIG. Each unit of the reception processing unit b13 performs processing according to a control signal input from the control unit b12.
- the receiving unit b131 converts the signal of each uplink carrier element received via each receiving antenna into an intermediate frequency (down-conversion), removes unnecessary frequency components, and amplifies the signal level to be maintained appropriately.
- the level is controlled, quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal, and the analog signal demodulated by quadrature demodulation is converted into a digital signal.
- the receiving unit b131 removes a portion corresponding to the guard interval from the converted digital signal.
- the receiving unit b131 performs fast Fourier transform on the signal from which the guard interval is removed, and extracts a frequency domain signal.
- the receiving unit b131 outputs the extracted signal for each uplink carrier element to the demultiplexing unit b132.
- the demultiplexing unit b132 demultiplexes the signal input from the receiving unit b131 into signals arranged in the uplink control channel, the uplink shared channel, and the uplink pilot channel for each uplink carrier element. This separation is performed based on radio resource allocation information that is determined in advance by the base station apparatus b1 and notified to each mobile station apparatus a1.
- the demultiplexing unit b132 outputs the separated uplink control channel and uplink shared channel signals to the propagation path compensation unit b134. Also, the demultiplexing unit b132 outputs a signal (uplink reference signal) arranged in the separated uplink pilot channel to the propagation path estimation unit b133.
- the propagation path estimation unit b133 calculates the estimated value of the propagation path of the uplink shared channel from the uplink reference signal sequence of each uplink carrier element input from the demultiplexing unit b132, and uses the propagation path estimation value as the propagation path. It outputs to the compensation part b134.
- the propagation path compensation unit b134 uses the propagation path estimation value input from the propagation path estimation unit b133 to convert the uplink control channel and the uplink shared channel signal of each uplink carrier element input from the demultiplexing unit b132.
- the propagation path is compensated for.
- the propagation path compensation unit b134 outputs the signal subjected to propagation path compensation to the inverse discrete Fourier transform unit b135.
- the inverse discrete Fourier transform unit b135 has a predetermined frequency for the signal of each carrier element input from the propagation path compensation unit b134, and the frequency at which the discrete Fourier transform unit a143 of the mobile station device a1 performs the discrete Fourier transform. To place.
- the inverse discrete Fourier transform unit b135 performs inverse discrete Fourier transform on the signal whose arrangement has been changed, and outputs an uplink shared channel signal to the demodulation unit b136.
- the demodulator b136 uses any modulation scheme such as QPSK, 16QAM, 64QAM, etc., for each uplink carrier element signal input from the inverse discrete Fourier transform unit b135, and is determined in advance by the base station apparatus b1. Demodulate using the modulation scheme notified to each mobile station apparatus a1. The demodulator b136 rearranges the demodulated encoded bits of each uplink carrier element in series and outputs them to the data / control information demultiplexers b1371 to b1373 corresponding to the uplink carrier element.
- modulation scheme such as QPSK, 16QAM, 64QAM, etc.
- Data / control information demultiplexing units b 1371 to b 1373 respectively correspond to the uplink carrier elements of uplink carrier element numbers 0 to 2, and control information separation processing for separating the encoded bits of the signals arranged in the corresponding uplink carrier elements I do. Since the functions of the data / control information demultiplexing units b 1371 to b 1373 are the same, one of them (data / control information demultiplexing unit b 1373) will be described as a representative.
- the control information separation process performed by the data / control information demultiplexing unit b 1373 will be described.
- the shared channel assignment information signal is “9”, that is, the data / control information demultiplexing unit b 1373 indicates that the uplink shared channel is not assigned to the mobile station device a1 that has transmitted the input information.
- the encoded bits of the uplink control information (CQI / PMI encoded bit, ACK / NACK encoded bit, RI encoded bit) are extracted from the encoded bits of the uplink control channel. In this case, the data / control information demultiplexing unit b 1373 does not extract the encoded bits of the uplink shared channel.
- the data / control information demultiplexing unit b 1373 converts the uplink shared channel encoded bits according to the allocation in FIG. To separate.
- the uplink shared channel of the uplink carrier element with the uplink carrier element number “2” is transmitted to the mobile station apparatus a1 from which the base station apparatus b1 has transmitted the information input to the data / control information demultiplexing unit b1373.
- the data / control information demultiplexing units b 1371 and b 1372 perform the above coded bit demultiplexing process when the shared channel allocation information signal has one uplink carrier element number “0” or “1”, respectively. Do.
- the uplink of the uplink carrier element having a plurality of uplink carrier element numbers is transmitted from the base station apparatus b1 to the mobile station apparatus a1 that has transmitted the information input to the data / control information demultiplexing unit b1373. This is when a shared channel is allocated.
- the data / control information demultiplexing unit b 1373 selects the uplink carrier element number n having the largest value among the uplink carrier element numbers n of the shared channel assignment information signal.
- the data / control information demultiplexing unit b 1373 determines whether or not the selected uplink carrier element number n is “2”. When it is determined as “2”, the encoded bits of the uplink shared channel are separated according to the assignment in FIG. That is, the data / control information demultiplexing unit b 1373 selects an uplink carrier element from a plurality of uplink carrier elements to which a radio resource is allocated according to a predetermined rule, and the uplink is arranged in the radio resource in the selected uplink carrier element. Extract link control information.
- the data / control information demultiplexing unit b 1372 separates the encoded bits of the uplink shared channel according to the assignment in FIG. 4A when the selected uplink carrier element number n is “1”.
- the data / control information demultiplexing unit b 1373 performs turbo decoding on the data coded bits, the CQI / PMI coded bits, the ACK / NACK coded bits, and the RI coded bits separated by the control information separating process described above.
- the turbo decoding unit b 1374 performs error correction decoding by turbo decoding on the data encoded bits of each uplink carrier element input from the data / control information demultiplexing units b 1371 to b 1373, and the decoded data is subjected to higher layer processing. To the part b11. Note that the turbo decoding unit b1374 corrects the error in the mobile station apparatus a1 on the assumption that the data coded bits replaced with the coded bits of ACK / NACK and RI have the same probability that the bit value is 0 or 1. Decrypt.
- the CQI / PMI decoding unit b1375 performs error correction decoding on the CQI / PMI encoded bits input from the data / control information demultiplexing units b1371 to b1373, and outputs the result to the upper layer processing unit b11.
- the ACK / NACK decoding unit b 1376 performs error correction decoding on the ACK / NACK encoded bits input from the data / control information demultiplexing units b 1371 to b 1373 and outputs the result to the higher layer processing unit b 11.
- the RI decoding unit b 1377 performs error correction decoding on the RI encoded bits input from the data / control information demultiplexing units b 1371 to b 1373 and outputs the result to the upper layer processing unit b 11.
- the CQI / PMI decoding unit a1374, the ACK / NACK decoding unit a1376, and the RI decoding unit a1377 perform different error correction decoding depending on whether the encoded bits are transmitted on the uplink control channel or the uplink shared channel. Do.
- FIG. 9 is a flowchart showing an example of the operation of the wireless communication system according to the present embodiment.
- Step S100 The base station apparatus b1 transmits a downlink reference signal that is known to the mobile station apparatus a1 while being distributed over all frequency bands of all downlink carrier elements used by the base station apparatus b1.
- step S101 The base station apparatus b1 transmits data information to the mobile station apparatus a1 using the downlink shared channel.
- step S102 The base station apparatus b1 allocates the uplink shared channel of the uplink carrier element to the mobile station apparatus a1, and generates uplink shared channel allocation information indicating the allocation.
- the base station apparatus b1 transmits the generated uplink shared channel allocation information using the downlink control channel.
- step S103 The process proceeds to step S103.
- Step S103 The mobile station device a1 receives the downlink reference signal transmitted in step S100, and generates channel quality information based on the received downlink reference signal. Next, the process proceeds to step S104.
- Step S104 The mobile station apparatus a1 receives the downlink shared channel data transmitted by the base station apparatus b1 in step S101, and generates ACK / NACK for the received data information. Next, the process proceeds to step S105.
- Step S105 The mobile station apparatus a1 receives the uplink shared channel allocation information transmitted in step S102, and transmits an ACK / NACK and channel quality information based on the received uplink shared channel allocation information. Select the uplink shared channel. In the present embodiment, the mobile station apparatus a1 selects the uplink shared channel of the uplink carrier element having the highest frequency among the allocated uplink shared channels as described above. Next, the process proceeds to step S106.
- Step S106 The mobile station apparatus a1 encodes and modulates data information, ACK / NACK, and channel quality information, and multiplexes them on radio resources of uplink carrier elements allocated to the base station apparatus.
- step S107 When the uplink shared channel is allocated, the mobile station apparatus a1 transmits data information, ACK / NACK, and channel quality information through the uplink shared channel.
- step S108 The base station apparatus b1 receives the signal arranged in the uplink shared channel of the uplink carrier element allocated to the mobile station apparatus a1 in step S102.
- step S109 The base station apparatus b1 demodulates the uplink shared channel received in step S108. Next, it progresses to S110.
- Step S110 The base station apparatus b1 selects an uplink shared channel of an uplink carrier element in which ACK / NACK and channel quality information are arranged based on the uplink shared channel allocation information generated in step S102. In this embodiment, the base station apparatus b1 selects the uplink shared channel of the uplink carrier element having the highest frequency among the assigned uplink shared channels as described above. Next, the process proceeds to step S111.
- Step S111 The base station apparatus b1 separates data information, ACK / NACK, and channel quality information from the uplink shared channel of the uplink carrier element selected in Step S110. Next, the process proceeds to step S112. (Step S112) The base station apparatus b1 demodulates and decodes the data information, ACK / NACK, and channel quality information separated in step S111. After step S112, the base station apparatus b1 and the mobile station apparatus a1 end the processing related to transmission of the uplink shared channel.
- FIG. 10 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 10 shows the configuration of the uplink shared channel in one subframe.
- FIG. 10 shows that when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b1 assigns an uplink shared channel to UCC-0 and UCC-2 to a certain mobile station apparatus a1.
- FIG. 10 shows that when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b1 assigns an uplink shared channel to UCC-0 and UCC-2 to a certain mobile station apparatus a1.
- UCC-0 and UCC-2 are arranged with uplink shared channel symbol U101 denoted by reference symbol U101 and uplink shared channel symbol U121 denoted by reference symbol U121, respectively.
- U101 and U121 areas hatched with right diagonal lines indicate symbols arranged in the uplink shared channel, and areas hatched with dots indicate uplink reference signals.
- the symbols U101 and U121 are the symbols in FIG.
- Symbol U102 with symbol U102 and symbol U122 with symbol U122 indicate symbols of the uplink shared channel obtained by removing the uplink reference signal from symbols U101 and U121, respectively.
- Symbol U103 with reference symbol U103 and symbol U123 with reference symbol U123 indicate symbols generated by performing inverse discrete Fourier transform on symbols U102 and U122, respectively.
- an unhatched area indicates a modulation symbol of data information.
- a hatched area with diagonal grid lines indicates an ACK / NACK modulation symbol
- a hatched area with a left diagonal line indicates an RI modulation symbol.
- a hatched area with a left diagonal line indicates a modulation symbol of CQI or PMI
- an unhatched area indicates a modulation symbol of data information.
- FIG. 10 shows that when uplink shared channels are allocated to UCC-0 and UCC-2, uplink control information (CQI / PMI, RI) is transmitted to the uplink shared channel of UCC-2 which is the uplink carrier element having the highest frequency.
- ACK / NACK is arranged.
- the radio communication system allocates radio resources in a plurality of uplink carrier elements by the base station apparatus b1, and the uplink communication element in the uplink carrier element selected by the mobile station apparatus a1 according to a predetermined rule
- the uplink control information is arranged and transmitted in the radio resource, and the uplink control information arranged in the radio resource in the uplink carrier element selected by the base station apparatus b1 according to a predetermined rule is extracted.
- wireless communications system can allocate the radio
- the radio communication system since the mobile communication device a1 and the base station device b1 select one uplink carrier element according to a predetermined rule, the radio communication system transmits signals only with the selected one uplink carrier element. Data information can be extracted without multiplexing and demultiplexing signals in other uplink carrier elements, and uplink control information is arranged in uplink shared channels of multiple uplink carrier elements The processing load can be reduced as compared with. Moreover, in the said embodiment, since the base station apparatus b1 arrange
- the mobile station apparatus according to this embodiment is referred to as a mobile station apparatus a2, and the base station apparatus is referred to as a base station apparatus b2.
- FIG. 11 is a schematic block diagram showing the configuration of the transmission processing unit a24 of the mobile station device a2 according to the second embodiment of the present invention.
- the transmission processing unit a24 (FIG. 11) according to the present embodiment is compared with the transmission processing unit a14 (FIG. 6) according to the first embodiment, the multiplex switching unit a2415 is different.
- the multiplex switching unit a2415 determines the output destination of the encoded bits to the multiplex unit a145.
- the multiplex switching unit a2415 assigns the output destination of the encoded bit to the uplink shared channel.
- the data / control information multiplexing units a1416 to a1418 corresponding to the received uplink carrier element are determined.
- the multiplex switching unit a2415 is predetermined in order from the largest carrier value n of the uplink carrier element number n of the shared channel assignment information signal in order from the smallest value.
- the number (M) of uplink carrier element numbers n is selected.
- Multiplex switching section a2415 determines the output destination of the coded bits to data / control information multiplexing sections a1416 to a1418 corresponding to the selected M uplink carrier element number n uplink carrier elements. That is, the multiplex switching unit a2415 sends the encoded bit output destinations to the data / control information multiplexing units a1416 to a1418 corresponding to the M uplink carrier elements in order from the highest uplink carrier element to the lowest frequency. decide. That is, the multiplex switching unit a2415 selects a plurality of uplink carrier elements. The multiplex switching unit a2415 outputs the encoded bits to the output destination determined by the above control information arrangement switching process.
- FIG. 12 is a schematic block diagram illustrating a configuration of the reception processing unit b23 of the base station device b2 according to the present embodiment.
- the reception processing unit b23 (FIG. 12) according to the present embodiment is compared with the reception processing unit b13 (FIG. 8) according to the first embodiment, the data / control information demultiplexing units b2371 to b2373 are different.
- receiving unit b131, demultiplexing unit b132, propagation path estimation unit b133, propagation path compensation unit b134, inverse discrete Fourier transform unit b135, demodulation unit b136, turbo decoding unit b1374, CQI / PMI decoding Unit b1375, ACK / NACK decoding unit b1376, and RI decoding unit b1377) have the same functions as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.
- Data / control information demultiplexing units b2371 to b2373 correspond to the uplink carrier elements of uplink carrier element numbers 0 to 2, respectively, and control information separation processing for separating the encoded bits of the signals arranged in the corresponding uplink carrier elements I do. Since the functions of the data / control information demultiplexing units b2371 to b2373 are the same, one (data / control information demultiplexing unit b2373) will be described as a representative.
- the data / control information demultiplexing unit b2373 extracts the encoded bits of the uplink control information from the encoded bits of the uplink control channel.
- the shared channel assignment information signal is one uplink carrier element number “2”
- the data / control information demultiplexing unit b2373 converts the uplink shared channel encoded bits according to the assignment in FIG. To separate.
- the encoded bits of the uplink shared channel are separated according to the assignment in FIG. That is, the data / control information demultiplexing unit b2373 selects a plurality of carrier elements. For the data / control information demultiplexing units b2381, b2372, when the selected uplink carrier element number n is “0”, “1”, respectively, the uplink shared channel Separate encoded bits.
- the data / control information demultiplexing unit b2373 performs turbo decoding on the data coded bits, the CQI / PMI coded bits, the ACK / NACK coded bits, and the RI coded bits separated by the control information separating process described above. Output to unit b 1374, CQI / PMI decoding unit b 1375, ACK / NACK decoding unit b 1376, and RI decoding unit b 1377.
- FIG. 13 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 13 shows the configuration of the uplink shared channel in one subframe.
- FIG. 13 shows that when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b2 assigns uplink shared channels to UCC-0 and UCC-2 to a certain mobile station apparatus a2.
- the multiplex switching unit a2415 of the mobile station device a2 and the data / control information demultiplexing units b2371 to b2373 of the base station device b2 select the uplink carrier element numbers “0” and “2” of the shared channel allocation information signal. To do.
- UCC-0 and UCC-2 are arranged with uplink shared channel symbol U201 and U221, respectively.
- a hatched area with a right diagonal line indicates a symbol arranged in the uplink shared channel
- a hatched area with a dot indicates an uplink reference signal.
- the symbols U201 and U221 are the symbols in FIG.
- Symbol U202 with symbol U202 and symbol U222 with symbol U222 indicate symbols of the uplink shared channel obtained by removing the uplink reference signal from symbols U201 and U221, respectively.
- Symbol U203 with reference symbol U203 and symbol U223 with reference symbol U223 indicate symbols generated by performing inverse discrete Fourier transform on symbols U202 and U222, respectively.
- hatched areas with diagonal lattice lines indicate ACK / NACK modulation symbols.
- a hatched area with a left oblique line indicates a modulation symbol of CQI or PMI, and an unhatched area indicates a modulation symbol of data information.
- the ACK / NACK modulation symbol of U203 is an ACK / NACK modulation symbol for the downlink shared channels of DCC-0 and DCC-1.
- the ACK / NACK modulation symbol of U223 is the ACK / NACK modulation symbol for the downlink shared channel of DCC-2.
- the type of ACK / NACK of the downlink carrier element arranged in each uplink carrier element of this uplink shared channel may be determined in advance. Further, ACK / NACK may be distributed and arranged on the uplink carrier elements of a plurality of uplink shared channels.
- FIG. 14 is a diagram illustrating another example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 14 shows a configuration of an uplink shared channel in one subframe.
- the multiplex switching unit a2415 of the mobile station device a2 and the data / control information demultiplexing units b2371 to b2373 of the base station device b2 use the uplink carrier element numbers “0”, “1”, “2” of the shared channel allocation information signal. ", The uplink carrier element numbers" 2 "and” 1 "are selected in descending order (in descending order of frequency).
- UCC-0, UCC-1, and UCC-2 are respectively assigned uplink shared channel symbol U301, symbol U311 and uplink shared channel symbol U311, symbol U321 and U321.
- the uplink shared channel symbol U321 is arranged.
- regions hatched with right diagonal lines indicate symbols arranged in the uplink shared channel, and regions hatched with dots indicate uplink reference signals.
- These symbols U301, U311 and U321 are the symbols in FIG.
- Symbol U302 with reference symbol U302, symbol U312 with reference symbol U312 and symbol U322 with reference symbol U322 indicate symbols of the uplink shared channel obtained by removing the uplink reference signal from symbols U301, U311 and U321, respectively. .
- symbol U303 with reference symbol U303 symbol U313 with reference symbol U313, and symbol U323 with reference symbol U323 indicate symbols generated by performing inverse discrete Fourier transform on symbols U302, U312 and U322, respectively.
- an unhatched area indicates a modulation symbol of data information.
- hatched areas with diagonal lattice lines indicate ACK / NACK modulation symbols.
- a hatched area with a left oblique line indicates a CQI or PMI modulation symbol
- an unhatched area indicates a modulation symbol of data information.
- the ACK / NACK modulation symbol of U313 is an ACK / NACK modulation symbol for the downlink shared channels of DCC-0 and DCC-1.
- the U323 ACK / NACK modulation symbol is an ACK / NACK modulation symbol for the DCC-2 downlink shared channel.
- the radio communication system arranges and transmits the uplink control information on the uplink shared channels of the plurality of uplink carrier elements selected by the mobile station device a2, and thus one uplink
- the radio communication system arranges and transmits the uplink control information on the uplink shared channels of the plurality of uplink carrier elements selected by the mobile station device a2, and thus one uplink
- the radio communication system selects the uplink carrier element having the highest frequency among the uplink carrier elements to which the uplink shared channel is allocated.
- This embodiment demonstrates the case where a radio
- the mobile station apparatus according to the present embodiment is referred to as a mobile station apparatus a3, and the base station apparatus is referred to as a base station apparatus b3.
- FIG. 15 is a schematic block diagram showing the configuration of the transmission processing unit a34 of the mobile station device a3 according to the third embodiment of the present invention.
- the transmission processing unit a34 (FIG. 15) according to the present embodiment is compared with the transmission processing unit a14 (FIG. 6) according to the first embodiment, the multiplex switching unit a3415 is different.
- the multiplex switching unit a3415 determines the output destination of the encoded bits to the multiplex unit a145.
- the multiplex switching unit a3415 assigns the output destination of the encoded bit to the uplink shared channel.
- the data / control information multiplexing units a1416 to a1418 corresponding to the received uplink carrier element are determined.
- the multiplex switching unit a3415 determines the uplink carrier element number of the uplink carrier element having the largest amount of radio resources of the allocated uplink shared channel among the uplink carrier element numbers n of the shared channel assignment information signal. Select n. Specifically, the multiplex switching unit a3415 calculates the number of physical resource block pairs of the uplink shared channel of each allocated uplink carrier element, and selects the uplink carrier element number n of the uplink carrier element with the largest calculated number To do. That is, the multiplex switching unit a3415 selects an uplink carrier element having the largest amount of radio resources of the uplink shared channel allocated in the uplink carrier element from among the plurality of uplink carrier elements to which the radio resource is allocated.
- Multiplex switching section a3415 determines the output destination of the coded bits to data / control information multiplexing sections a1416 to a1418 corresponding to the selected uplink carrier element of uplink carrier element number n.
- the multiplex switching unit a3415 outputs the encoded bits to the output destination determined by the above control information arrangement switching process.
- FIG. 16 is a schematic block diagram illustrating the configuration of the reception processing unit b33 of the base station apparatus b3 according to the present embodiment.
- the reception processing unit b33 (FIG. 16) according to the present embodiment is compared with the reception processing unit b13 (FIG. 8) according to the first embodiment, the data / control information demultiplexing units b3371 to b3373 are different.
- receiving unit b131, demultiplexing unit b132, propagation path estimation unit b133, propagation path compensation unit b134, inverse discrete Fourier transform unit b135, demodulation unit b136, turbo decoding unit b1374, CQI / PMI decoding Unit b1375, ACK / NACK decoding unit b1376, and RI decoding unit b1377) have the same functions as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.
- the data / control information demultiplexing units b3371 to b3373 correspond to the uplink carrier elements of the uplink carrier element numbers 0 to 2, respectively, and control information separation processing for separating the encoded bits of the signals arranged in the corresponding uplink carrier elements I do. Since the functions of the data / control information demultiplexing units b3371 to b3373 are the same, one (data / control information demultiplexing unit b3373) will be described as a representative.
- the data / control information demultiplexing unit b3373 extracts the encoded bits of the uplink control information from the encoded bits of the uplink control channel.
- the shared channel assignment information signal is one uplink carrier element number “2”
- the data / control information demultiplexing unit b3373 converts the uplink shared channel encoded bits according to the assignment in FIG. To separate.
- the encoded bits of the uplink shared channel are separated according to the assignment in FIG. That is, the data / control information demultiplexing unit b3373 selects an uplink carrier element having the largest amount of radio resources of the uplink shared channel allocated in the uplink carrier element among the plurality of uplink carrier elements to which the radio resource is allocated. select.
- the data / control information demultiplexing units b3381 and b3372 when the selected uplink carrier element number n is “0” and “1”, respectively, the uplink shared channel Separate encoded bits.
- the data / control information demultiplexing unit b3373 performs turbo decoding on the data coded bits, the CQI / PMI coded bits, the ACK / NACK coded bits, and the RI coded bits separated by the control information separating process.
- FIG. 17 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 17 shows the configuration of the uplink shared channel in one subframe.
- FIG. 17 shows that when performing communication using the frequency band aggregation shown in FIG. 2, the base station apparatus b3 assigns uplink shared channels to UCC-0 and UCC-2 to a certain mobile station apparatus a3.
- FIG. 17 shows that when performing communication using the frequency band aggregation shown in FIG. 2, the base station apparatus b3 assigns uplink shared channels to UCC-0 and UCC-2 to a certain mobile station apparatus a3.
- FIG. 17 shows that the number of physical resource pairs (for example, 50) allocated to the UCC-0 uplink shared channel is the number of physical resource pairs (for example, 50) allocated to the UCC-2 uplink shared channel. , 30).
- the multiplex switching unit a3415 of the mobile station device a3 and the data / control information demultiplexing units b3371 to b3373 of the base station device b3 select the uplink carrier element number “0” of the shared channel assignment information signal.
- UCC-0 and UCC-2 are arranged with an uplink shared channel symbol U401 and a symbol U421, respectively.
- a hatched area with a right diagonal line indicates a symbol arranged in the uplink shared channel
- a hatched area with a dot indicates an uplink reference signal.
- the symbols U401 and U421 are the symbols in FIG.
- Symbol U402 with symbol U402 and symbol U422 with symbol U422 indicate uplink shared channel symbols obtained by removing uplink reference signals from symbols U401 and U421, respectively.
- Symbol U403 with symbol U403 and symbol U423 with symbol U423 indicate symbols generated by performing inverse discrete Fourier transform on symbols U402 and U422, respectively.
- a hatched area with diagonal lattice lines indicates an ACK / NACK modulation symbol.
- a hatched area with a left oblique line indicates a modulation symbol of CQI or PMI
- an unhatched area indicates a modulation symbol of data information.
- an unhatched area indicates a modulation symbol of data information.
- the radio communication system selects the uplink carrier element with the largest amount of radio resources allocated to the uplink carrier element by the mobile station apparatus a3 and the base station apparatus b3.
- the reception characteristic of the uplink control information can be improved as compared with the case where the uplink carrier element with a small amount of resources is selected.
- the mobile station apparatus according to the present embodiment is referred to as a mobile station apparatus a4, and the base station apparatus is referred to as a base station apparatus b4.
- FIG. 18 is a schematic block diagram showing the configuration of the transmission processing unit a44 of the mobile station device a4 according to the fourth embodiment of the present invention.
- the transmission processing unit a44 (FIG. 18) according to the present embodiment is compared with the transmission processing unit a14 (FIG. 6) according to the first embodiment, the multiplex switching unit a4415 is different.
- the multiplexing switching unit a4415 determines the output destination of the coded bits to the multiplexing unit a145.
- the multiplex switching unit a4415 assigns the output destination of the encoded bit to the uplink shared channel.
- the data / control information multiplexing units a1416 to a1418 corresponding to the received uplink carrier element are determined.
- the output destination of the encoded bits is determined as follows according to a predetermined arrangement rule.
- the multiplex switching unit a4415 determines the uplink shared channel based on the modulation scheme and coding rate of the allocated uplink shared channel among the uplink carrier element numbers n of the shared channel allocation information signal.
- the uplink carrier element number n of the uplink carrier element having the smallest modulation multi-level number and the lowest coding rate is selected.
- the modulation scheme and coding rate are determined in advance by the base station apparatus b1 as described above and notified to each mobile station apparatus a1.
- the multiplex switching unit a4415 calculates the coding rate of the uplink shared channel of each assigned uplink carrier element, and the uplink coding channel has the smallest modulation multilevel number and the calculated coding rate is the lowest.
- the uplink carrier element number n of the carrier element is selected. Further, the multiplex switching unit a4415 sets the uplink carrier element number n of the uplink carrier element based on the modulation scheme and the information for calculating the coding rate included in the uplink shared channel allocation information transmitted by the base station apparatus b4. You may choose. That is, the multiplex switching unit a4415 has the smallest number of modulation multilevels of the uplink shared channel allocated in the uplink carrier element among the plurality of uplink carrier elements to which the radio resources are allocated, and the lowest coding rate. Select a carrier element.
- Multiplex switching section a4415 determines the output destination of the coded bits to data / control information multiplexing sections a1416 to a1418 corresponding to the selected uplink carrier element of uplink carrier element number n.
- the multiplex switching unit a4415 outputs the encoded bits to the output destination determined by the above control information arrangement switching process.
- FIG. 19 is a schematic block diagram illustrating a configuration of the reception processing unit b43 of the base station device b4 according to the present embodiment.
- the reception processing unit b43 (FIG. 19) according to the present embodiment is compared with the reception processing unit b13 (FIG. 8) according to the first embodiment, the data / control information demultiplexing units b4371 to b4373 are different.
- receiving unit b131, demultiplexing unit b132, propagation path estimation unit b133, propagation path compensation unit b134, inverse discrete Fourier transform unit b135, demodulation unit b136, turbo decoding unit b1374, CQI / PMI decoding Unit b1375, ACK / NACK decoding unit b1376, and RI decoding unit b1377) have the same functions as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.
- the data / control information demultiplexing units b4371 to b4373 correspond to the uplink carrier elements of the uplink carrier element numbers 0 to 2, respectively, and control information separation processing for separating the encoded bits of the signals arranged in the corresponding uplink carrier elements I do. Since the functions of the data / control information demultiplexing units b4371 to b4373 are the same, one (data / control information demultiplexing unit b4373) will be described as a representative.
- the data / control information demultiplexing unit b4373 extracts the encoded bits of the uplink control information from the encoded bits of the uplink control channel.
- the shared channel allocation information signal is one uplink carrier element number “2”
- the data / control information demultiplexing unit b4373 sets the encoded bits of the uplink shared channel according to the allocation in FIG. To separate.
- the encoded bits of the uplink shared channel are separated according to the assignment in FIG. That is, the data / control information demultiplexing unit b4373 has the lowest coding rate of the allocated uplink shared channel and the smallest number of modulation multilevels among the plurality of uplink carrier elements to which the radio resource is allocated. Select. For the data / control information demultiplexing units b4381, b4372, if the selected uplink carrier element number n is “0”, “1”, respectively, the uplink shared channel Separate encoded bits.
- the data / control information demultiplexing unit b4373 turbo-decodes the data coded bits, CQI / PMI coded bits, ACK / NACK coded bits, and RI coded bits separated by the control information separating process described above. Output to unit b 1374, CQI / PMI decoding unit b 1375, ACK / NACK decoding unit b 1376, and RI decoding unit b 1377.
- FIG. 20 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 20 shows the configuration of the uplink shared channel in one subframe.
- FIG. 20 shows that when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b4 assigns an uplink shared channel to UCC-0 and UCC-2 to a certain mobile station apparatus a4.
- FIG. 20 shows that when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b4 assigns an uplink shared channel to UCC-0 and UCC-2 to a certain mobile station apparatus a4.
- FIG. 20 shows a case where the coding rate (for example, 1/3) of the uplink shared channel of UCC-0 is larger than the coding rate (for example, 2/5) of the uplink shared channel of UCC-2. Show.
- the multiplex switching unit a4415 of the mobile station device a3 and the data / control information demultiplexing units b4371 to b4373 of the base station device b4 select the uplink carrier element number “0” of the shared channel assignment information signal.
- UCC-0 and UCC-2 are arranged with uplink shared channel symbol U 501 and reference symbol U 521, respectively.
- symbols U501 and U521 regions hatched with right diagonal lines indicate symbols arranged in the uplink shared channel, and regions hatched with dots indicate uplink reference signals.
- the symbols U501 and U521 are the symbols in FIG.
- Symbol U502 with symbol U502 and symbol U522 with symbol U522 indicate uplink shared channel symbols obtained by removing uplink reference signals from symbols U501 and U521, respectively.
- Symbol U503 with reference symbol U503 and symbol U523 with reference symbol U523 indicate symbols generated by performing inverse discrete Fourier transform on symbols U502 and U522, respectively.
- a hatched area with diagonal lattice lines indicates an ACK / NACK modulation symbol.
- a hatched area with a left oblique line indicates a modulation symbol of CQI or PMI
- an unhatched area indicates a modulation symbol of data information.
- an unhatched area indicates a modulation symbol of data information.
- the radio communication system selects the uplink carrier element with the lowest coding rate of the radio resources allocated to the uplink carrier element by the mobile station apparatus a4 and the base station apparatus b4. Therefore, it is possible to improve the reception characteristics of the uplink control information compared to the case of selecting an uplink carrier element with a high coding rate of radio resources.
- the radio communication system selects the uplink carrier element having the highest frequency among the uplink carrier elements to which the uplink shared channel is allocated.
- the radio communication system preferentially selects the uplink carrier element selected by the base station apparatus and notified to the mobile station apparatus from among the uplink carrier elements to which the uplink shared channel is allocated.
- the base station apparatus measures the quality of the propagation path of each uplink carrier element based on signals such as the uplink shared channel and uplink reference signal received by each uplink carrier element, and selects the uplink carrier element with the good quality.
- the mobile station apparatus is notified of the uplink carrier element number of the selected uplink carrier element.
- the transmission processing unit and the base station apparatus of the mobile station apparatus are different.
- the configuration and functions of other components are the same as those in the first embodiment, and thus descriptions of the same functions as those in the first embodiment are omitted.
- the mobile station apparatus according to this embodiment is referred to as a mobile station apparatus a5
- the base station apparatus is referred to as a base station apparatus b5.
- FIG. 21 is a schematic block diagram showing the configuration of the transmission processing unit a54 of the mobile station device a5 according to the fifth embodiment of the present invention.
- the transmission processing unit a54 (FIG. 21) according to the present embodiment is compared with the transmission processing unit a14 (FIG. 6) according to the first embodiment, the multiplex switching unit a5415 is different.
- the multiplex switching unit a5415 determines the output destination of the coded bits to the multiplex unit a145.
- the multiplex switching unit a5415 selects the uplink carrier element number n of the uplink carrier element notified in advance from the base station apparatus b5. That is, the multiplex switching unit a5415 preferentially selects an uplink carrier element notified in advance from the base station apparatus b5 among a plurality of uplink carrier elements to which radio resources are allocated.
- Multiplex switching section a5415 determines the output destination of the coded bits to data / control information multiplexing sections a1416 to a1418 corresponding to the uplink carrier element notified from base station apparatus b5.
- the multiplex switching unit a5415 outputs the encoded bits to the output destination determined by the above control information arrangement switching process.
- FIG. 22 is a schematic block diagram showing the configuration of the base station device b5 according to this embodiment.
- the carrier element notification unit b512 carrier element selection unit
- the reception processing unit b53 is different.
- the functions of other components are the same as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.
- the carrier element notification unit b512 determines the quality of the propagation path based on the quality information of the propagation path of the uplink carrier element measured based on the uplink shared channel received by each uplink carrier element and the signal such as the uplink reference signal. Choose a good upstream carrier factor.
- the carrier element notification unit b512 notifies the mobile station device a5 of the selected uplink carrier element number n of the uplink carrier element via the transmission processing unit b14. Further, the carrier element notification unit b512 outputs the uplink carrier element number n of the selected uplink carrier element to the reception process b53 via the control unit b12.
- FIG. 23 is a schematic block diagram illustrating a configuration of the reception processing unit b53 of the base station apparatus b5 according to the present embodiment.
- the reception processing unit b53 (FIG. 19) according to the present embodiment is compared with the reception processing unit b13 (FIG. 8) according to the first embodiment, the data / control information demultiplexing units b5371 to b5373 are different.
- receiving unit b131, demultiplexing unit b132, propagation path estimation unit b133, propagation path compensation unit b134, inverse discrete Fourier transform unit b135, demodulation unit b136, turbo decoding unit b1374, CQI / PMI decoding Unit b1375, ACK / NACK decoding unit b1376, and RI decoding unit b1377) have the same functions as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.
- the data / control information demultiplexing units b 5371 to b 5373 respectively correspond to the uplink carrier elements of the uplink carrier element numbers 0 to 2 and control information separation processing for separating the encoded bits of the signals arranged in the corresponding uplink carrier elements I do. Since the functions of the data / control information demultiplexing units b5371 to b5373 are the same, one of them (the data / control information demultiplexing unit b4373) will be described as a representative.
- the data / control information demultiplexing unit b5373 extracts the encoded bits of the uplink control information from the encoded bits of the uplink control channel.
- the shared channel allocation information signal is not “9”
- the data / control information demultiplexing unit b5373 determines whether the uplink carrier element number n input from the carrier element notification unit b512 is “2”. . When it is determined as “2”, the encoded bits of the uplink shared channel are separated according to the assignment in FIG.
- the data / control information demultiplexing unit b5373 preferentially selects an uplink carrier element notified by the mobile station device a5 in advance from among a plurality of uplink carrier elements to which radio resources are allocated.
- the data / control information demultiplexing units b5381 and b5372 if the selected uplink carrier element numbers n are “0” and “1”, respectively, the uplink shared channel is determined according to the assignment in FIG. Separate encoded bits.
- the data / control information demultiplexing unit b5373 performs turbo decoding on the data coded bits, CQI / PMI coded bits, ACK / NACK coded bits, and RI coded bits separated by the control information separating process described above. Output to unit b 1374, CQI / PMI decoding unit b 1375, ACK / NACK decoding unit b 1376, and RI decoding unit b 1377.
- FIG. 24 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 24 shows the configuration of the uplink shared channel in one subframe. 24, when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b5 assigns uplink shared channels to UCC-0 and UCC-2 to a certain mobile station apparatus a5.
- FIG. 24 is a diagram illustrating an example of the configuration of the uplink shared channel according to the present embodiment.
- the horizontal axis represents the time domain
- the vertical axis represents the frequency domain.
- FIG. 24 shows the configuration of the uplink shared channel in one subframe. 24, when performing communication using frequency band aggregation shown in FIG. 2, the base station apparatus b5 assigns uplink shared channels to UCC-0 and UCC-2 to a certain mobile station apparatus a5.
- the base station apparatus b5 selects UCC-0 as the uplink carrier element for preferentially arranging the uplink control information, and “0” as the uplink carrier element number of the preferentially arranged uplink carrier element. Is shown to the mobile station device a5. In this case, the multiplex switching unit a5415 of the mobile station device a5 and the data / control information demultiplexing units b5371 to b5373 of the base station device b5 select the uplink carrier element number “0” of the shared channel assignment information signal.
- UCC-0 and UCC-2 are arranged with an uplink shared channel symbol U601 denoted by reference symbol U601 and an uplink shared channel symbol U621 denoted by reference symbol U621, respectively.
- U601 and U621 areas hatched with right diagonal lines indicate symbols arranged in the uplink shared channel, and areas hatched with dots indicate uplink reference signals.
- the symbols U601 and U621 are the symbols in FIG.
- Symbol U602 with symbol U602 and symbol U622 with symbol U622 indicate uplink shared channel symbols obtained by removing the uplink reference signal from symbols U601 and U621, respectively.
- Symbol U603 denoted by reference symbol U603 and symbol U623 denoted by reference symbol U623 indicate symbols generated by performing inverse discrete Fourier transform on symbols U602 and U622, respectively.
- a hatched area with diagonal lattice lines indicates an ACK / NACK modulation symbol.
- a hatched area with a left diagonal line indicates a modulation symbol of CQI or PMI
- an unhatched area indicates a modulation symbol of data information.
- an unhatched area indicates a modulation symbol of data information.
- the mobile station device a5 and the base station device b5 select an uplink carrier element having a good propagation path quality. As compared with the case of selecting, it is possible to improve the reception characteristics of the uplink control information.
- the mobile station device a1 and the base station device b1 assign the uplink carrier element having the highest frequency among the allocated uplink shared channels to the uplink carrier element in which the uplink control information signal is arranged. Selected as.
- the present invention is not limited to this, and the uplink carrier element having the lowest frequency or the uplink carrier element having the center frequency may be selected as the uplink carrier element in which the signal of the uplink control information is arranged.
- the uplink carrier element in which the uplink control information signal is arranged is set in the uplink control information.
- the mobile station device a2 and the base station device b2 assign M uplink carrier elements in order from the highest uplink carrier element having the highest frequency to the lowest frequency in the uplink control information. It was selected as the upstream carrier element to place the signal.
- the present invention is not limited to this.
- the mobile station apparatus a2 and the base station apparatus b2 perform uplink control on M uplink carrier elements in order from the smallest uplink carrier element to the highest frequency. You may select as a carrier element which arrange
- the mobile station device a2 and the base station device b2 arrange the M uplink carrier elements and the uplink control information signals according to the order of demodulation or decoding processing of the uplink carrier element signals in the base station device b2.
- M uplink carrier elements may be selected as an uplink carrier element in which uplink control information signals are arranged in order from the earliest decoding processing order in the base station apparatus b2. Also good.
- the mobile station apparatus a2 and the base station apparatus b2 assign M uplink carrier elements in the descending order of the amount of radio resources allocated in the uplink carrier element among the uplink carrier elements allocated to the uplink control information. May be selected as an uplink carrier element for arranging the signals.
- the number of uplink carrier elements selected by the mobile station device a2 and the base station device b2 may be limited to 2 or expanded to 5. In each of the above embodiments, the number of uplink carrier elements may not be three, for example, four or more.
- the mobile station device a3 and the base station device b3 control the uplink carrier element with the largest amount of radio resources among the uplink shared channels allocated in the uplink carrier element by uplink control.
- the mobile station device a4 and the base station device b4 select the uplink carrier element to which the information signal is arranged, and the coding rate is the uplink shared channel allocated in the uplink carrier element.
- the uplink carrier element having the lowest modulation multi-level number is selected as the uplink carrier element for arranging the uplink control information signal.
- the present invention is not limited to this.
- the uplink control information signal is arranged based on the amount of radio resources of the uplink shared channel allocated in the uplink carrier element, the coding rate, and the modulation scheme.
- An uplink carrier element may be selected.
- the signal of the uplink control information May be selected.
- the uplink control information signal is not allocated to an uplink shared channel with a large amount of radio resources but a high coding rate, or an uplink shared channel with a low coding rate but a small amount of radio resources.
- the mobile station device a4 and the base station device b4 have the smallest number of modulation multi-values and the lowest coding rate among the uplink shared channels allocated in the uplink carrier element.
- the carrier element is selected as the uplink carrier element for arranging the uplink control information signal.
- the present invention is not limited to this, and, for example, an uplink carrier element having the lowest coding rate may be selected from among uplink shared channels allocated in the uplink carrier element. Further, the uplink carrier element having the smallest modulation multi-level number may be selected. Thereby, the structure of the base station apparatus b4 and the mobile station apparatus a4 can be simplified.
- the mobile station apparatus a4 and the base station apparatus b4 first select a carrier element having the smallest modulation multilevel number from among the uplink shared channels allocated in the uplink carrier element, and then select the carrier having the smallest modulation multilevel number.
- the uplink carrier element having the lowest coding rate may be selected as the uplink carrier element in which the uplink control information signal is arranged.
- the mobile station device a4 and the base station device b4 first select an uplink carrier element having the lowest coding rate from among the uplink shared channels allocated in the uplink carrier element, and then the uplink carrier having the lowest coding rate.
- the carrier element with the smallest modulation multi-level number may be selected as the uplink carrier element for arranging the uplink control information signal.
- the mobile station device a5 and the base station device b5 select and notify the mobile station device a5 of the uplink shared channel allocated in the uplink carrier element.
- the uplink carrier element is selected as the uplink carrier element for arranging the uplink control information signal.
- the present invention is not limited to this.
- the uplink shared channel is not allocated in the uplink carrier element that the base station apparatus b5 has previously notified to the mobile station apparatus a5, and the base station apparatus b5 notifies the mobile station apparatus a5 in advance.
- the uplink shared channel is allocated only to other than the uplink carrier element, the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment are not used without using the fifth embodiment. You may apply. As a result, it is not necessary to assign an uplink shared channel to the uplink carrier element selected by the base station device b5 and notified to the mobile station device a5.
- the base station apparatuses b1 to b5 measure the power of signals arranged in the uplink shared channel radio resources allocated to the mobile station apparatuses a1 to a5, and the measured power is determined in advance. When it is determined that the value is greater than or equal to the value, an uplink carrier element may be selected. As a result, it is possible to determine that the mobile station apparatuses a1 to a5 have correctly decoded the downlink control information (uplink shared channel assignment information) indicating the radio resource assignment of the uplink shared channel, and the downlink control information ( When decoding of (uplink shared channel allocation information) fails, the uplink control information is not arranged according to a predetermined rule, and an error can be avoided.
- uplink control information uplink shared channel assignment information
- the uplink communication that is communication from the mobile station devices a1 to a5 to the base station devices b1 to b5 has been described.
- the present invention is not limited to this, and the base station devices b1 to b5 are not limited thereto.
- the present invention may be applied to downlink communication from (first communication device) to mobile station devices a1 to a5 (second communication device).
- the mobile station apparatus has the configuration and functions of the base station apparatuses b1 to b5
- the base station apparatus has the configuration and functions of the mobile station apparatus.
- a program that operates in the base station apparatus and mobile station apparatus related to the present invention is a program that controls a CPU (Central Processing Unit) or the like (a program that causes a computer to function) so as to realize the functions of the above-described embodiments related to the present invention. It may be. Information handled by these devices is temporarily stored in RAM (Random Access Memory) during the processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.
- RAM Random Access Memory
- ROMs Read Only Memory
- HDD Hard Disk Drive
- the mobile station devices a1 to a3 and base station devices b1 to b3 in the above-described embodiment for example, the upper layer processing unit a11, the control unit a12, the reception processing unit a13, the radio resource control unit a111, and the turbo coding Unit a1411, CQI / PMI encoding unit a1412, ACK / NACK encoding unit a1413, RI encoding unit a1414, multiplexing switching unit a1415, a2415, a3415, a4415, a5415, data / control information multiplexing units a1416 to a1418, modulation unit a142, discrete Fourier transform unit a143, uplink reference signal generation unit a144, multiplexing unit a145, transmission unit a145, higher layer processing unit b11, control unit b12, transmission processing unit b14, radio resource control unit b111, carrier element notification unit 512 , Receiving unit b131, de
- the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed.
- the “computer system” is a computer system built in the mobile station devices a1 to a3 or the base station devices b1 to b3, and includes hardware such as an OS and peripheral devices.
- the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
- the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line,
- a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain period of time.
- 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 present invention is suitable for use in a mobile station apparatus, a radio communication system, and similar technology related to mobile communication, and assigns radio resources in a plurality of carrier elements and arranges control information arranged in the assigned radio resources, It is possible to reliably communicate with data information.
- Turbo encoder a1412 ... CQI / PMI encoder, a1413 ... ACK / NACK encoder, a1414 ... RI encoder, a1415, a2415, a3415 a4415, a5415: Multiple switching unit (carrier element selection unit), a1416 to a1418 ... Data / control information multiplexing unit, b11, b51 ... Upper layer processing unit, b12 ... Control unit, b13, b23 , B33, b43, b53 ... reception processing unit, b14 ... transmission processing unit, b111 ... radio resource control unit, b512 ... carrier element notification unit (carrier element selection unit), b131 ...
- B132 ... demultiplexing part, b133 ... propagation path estimation part, b134 ... propagation path compensation part, b135 ... inverse discrete Fourier transform part, b136 ... demodulation part, b137, b237, b337 , B437, b537 ... decoding unit, b1371 to b1373, b2371 to b2373, b3371 to b3373 ... data / control information demultiplexing unit B1374 ⁇ ⁇ ⁇ turbo decoding unit, b1375 ⁇ CQI / PMI decoding unit, b1376 ⁇ ACK / NACK decoding unit, b1377 ⁇ RI decoding unit
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Abstract
Description
本願は、2009年04月24日に、日本に出願された特願2009-106418号に基づき優先権を主張し、その内容をここに援用する。
また、LTEにおいて、基地局装置から移動局装置への無線通信(下りリンク)では、報知チャネル(Physical Broadcast Channel;PBCH)、下りリンク制御チャネル(Physical Downlink Control Channel;PDCCH)、下りリンク共用チャネル(Physical Downlink Shared Channel;PDSCH)、マルチキャストチャネル(Physical Multicast Channel;PMCH)、制御フォーマットインディケータチャネル(Physical Control Format Indicator Channel;PCFICH)、HARQインディケータチャネル(Physical Hybrid Automatic Repeat Request Indicator Channel;PHICH)が割り当てられる。また、移動局装置から基地局装置への無線通信(上りリンク)では、上りリンク共用チャネル(PUSCH:Physical Uplink Shared Channel)、上りリンク制御チャネル(PUCCH:Physical Uplink Control Channel)、ランダムアクセスチャネル(PRACH:Physical Random Access Channel)が割り当てられる。
例えば、LTE-Aでは、LTEと同一のチャネル構造の周波数帯域(以下、「キャリア要素(CC:Carrier Component)」、または、「コンポーネントキャリア(CC:Component Carrier)」と称する。)を複数用いて、1つの周波数帯域(広帯域な周波数帯域)として使用する技術(周波数帯域集約:Spectrum aggregation、Carrier aggregation、Frequency aggregationなどとも称される。)が提案されている。
しかしながら、移動局装置に対して複数の上りリンクのキャリア要素の上りリンク共用チャネルを割り当てる場合、全ての上りリンク制御情報をこの複数の上りリンクキャリア要素全てに逐一割り当てると、データ情報を割り当てる無線リソースが減ってしまうという欠点があった。また、いずれか一つに割り当てるとしても、基地局装置は、どの上りリンク共用チャネルに上りリンク制御情報が配置されるかを判定することができず、当該上りリンク共用チャネルに配置された情報の種類を誤ってしまうという欠点があった。
上記構成によると、前記無線通信システムは、情報を確実に通信することができる。
以下、図面を参照しながら本発明の第1の実施形態について詳しく説明する。
図1は、本発明の第1実施形態に係る無線通信システムの概念図である。図1において、無線通信システムは、移動局装置A1~A3(第1の通信装置)、及び基地局装置B1(第2の通信装置)を具備する。移動局装置A1~A3と基地局装置B1とは、後述する周波数帯域集約を用いた通信を行う。
図1は、基地局装置B1から移動局装置A1~A3への無線通信(下りリンク)では、下りリンクパイロットチャネル(または、「下りリンクリファレンスシグナル(Downlink Reference Signal;DL RS)」とも称する。)、報知チャネル(Physical Broadcast Channel;PBCH)、下りリンク制御チャネル(Physical Downlink Control Channel;PDCCH)、下りリンク共用チャネル(Physical Downlink Shared Channel;PDSCH)、マルチキャストチャネル(Physical Multicast Channel;PMCH)、制御フォーマットインディケータチャネル(Physical Control Format Indicator Channel;PCFICH)、HARQインディケータチャネル(Physical Hybrid ARQ Indicator Channel;PHICH)が割り当てられることを示す。また、図1は、移動局装置A1~A3から基地局装置B1への無線通信(上りリンク)では、上りリンクパイロットチャネル(または、「上りリンクリファレンスシグナル(Uplink Reference Signal;UL RS)」とも称する。)、上りリンク制御チャネル(PUCCH:Physical Uplink Control Channel)、上りリンク共用チャネル(PUSCH:Physical Uplink Shared Channel)、ランダムアクセスチャネル(PRACH:Physical Random Access Channel)が割り当てられることを示す。
以下、移動局装置A1~A3を移動局装置a1といい、基地局装置B1を基地局装置b1という。
図2は、本実施形態に係る周波数帯域集約処理の一例を示す図である。図2において、横軸は周波数領域、縦軸は時間領域を示す。
図2に示すように、下りリンクのサブフレームD1は、20MHzの帯域幅を持った3つのキャリア要素(DCC-0:Downlink Component Carrier-0、DCC-1、DCC-2)のサブフレームによって構成されている。この下りリンクのキャリア要素(下りキャリア要素という)のサブフレーム各々には、右斜線でハッチングした領域が示す下りリンク制御チャネルと、ハッチングをしない領域が示す下りリンク共用チャネルと、が時間多重されて割り当てられる。
一方、上りリンクのサブフレームU1は、20MHzの帯域幅を持った3つのキャリア要素(UCC-0:Uplink Component Carrier-0、UCC-1、UCC-2)によって構成されている。この上りリンクのキャリア要素(上りキャリア要素という)のサブフレーム各々には、斜めの格子状の線でハッチングした領域が示す上りリンク制御チャネルと、左斜線でハッチングした領域が示す上りリンク共用チャネルと、が周波数多重されて割り当てられる。以下、UCC-n(n=0、1、2)の番号nを上りキャリア要素番号nという。
図3は、本実施形態に係る上りリンクの無線フレームの構成の一例を示す概略図である。図3は、ある上りキャリア要素における無線フレームの構成を示す。図3において、横軸は時間領域、縦軸は周波数領域である。
図3に示すように、上りキャリア要素の無線フレームは、複数の物理リソースブロック(PRB;Physical Resource Block)ペア(例えば、符号RBを付した破線で囲まれた領域)から構成されている。この物理リソースブロックペアは、無線リソースの割り当てなどの単位であり、予め決められた幅の周波数帯(PRB帯域幅)及び時間帯(2個のスロット=1個のサブフレーム)からなる。
1個の物理リソースブロックペアは、時間領域で連続する2個の物理リソースブロック(PRB帯域幅×スロット)から構成される。1個の物理リソースブロック(図3において、太線で囲まれている単位)は、周波数領域において12個のサブキャリアから構成され、時間領域において7個のDFT―Spread OFDMシンボルから構成される。
上りリンクの各サブフレームでは、例えば、上りリンク制御チャネルと、上りリンク共用チャネルと、上りリンク制御チャネル及び上りリンク共用チャネルの伝搬路推定に用いる上りリンクパイロットチャネルとが割り当てられる。
上りリンク制御チャネルは、上りキャリア要素の帯域幅の両端の物理リソースブロックペア(左斜線でハッチングされた領域)に割り当てられる。
上りリンク共用チャネルは、上りリンク制御チャネル以外の物理リソースブロックペア(ハッチングされない領域)が割り当てられる。尚、移動局装置a1は、ある1つのサブフレームにおいて、上りリンク制御チャネル及び上りリンク共用チャネルの両方にデータを配置しない。
上りリンクパイロットチャネル(図示せず)は、上りリンク共用チャネル及び上りリンク制御チャネルに時間多重されて割り当てられる。
上りリンク制御チャネルには、チャネル品質情報、スケジューリング要求(SR:Scheduling Request)、ACK(ACKnowledgement;肯定応答)/NACK(Negative-ACKnowledgement;否定応答)など、通信の制御に用いられる情報である上りリンク制御情報(Uplink Control Information;UCI)の信号が配置される。
尚、チャネル品質情報は、移動局装置a1が下りリンクのリファレンスシグナルで測定した下りリンクのチャネルの伝送品質を示す情報である。また、スケジューリング要求は、移動局装置a1が基地局装置b1に上りリンクの無線リソースの割り当てを要求する情報である。また、ACK/NACKは、移動局装置が受信した下りリンク共用チャネルの復号の成否を示す情報である。
上りリンク共有チャネルには、上りリンク制御情報以外の情報であるデータ情報(トランスポートブロック;Transport Block)の信号(データ信号という)が配置される。また、本実施形態では、上りリンク共有チャネルが割り当てられた場合、上りリンク共有チャネルに、上りリンク制御情報の信号(上り制御信号という)も配置される。
以下、上りリンク共有チャネルにおける上り制御信号の配置について説明をする。
図4は、本実施形態に係る上りリンク共用チャネルにおける上り制御信号の配置の一例を示す概略図である。図4において、図4(A)は上り制御信号のマッピングを示す図であり、図4(B)は上りリンク共有チャネルでの上り制御信号の配置を示す図である。尚、図4(B)は、あるサブフレームにおいて移動局装置a1に対して割り当てられた上りキャリア要素の上りリンク共用チャネルの1個を示し、また、上りリンク共用チャネルとして2個の物理リソースブロックペアが割り当てられた場合を示す。
また、図4(A)において、ハッチングされていない領域は、データ情報の変調シンボルが配置される領域を示す。データ情報の変調シンボルは、CQIとPMIの変調シンボルを全て配置した後、CQIとPMIの変調シンボルと同様に配置される。但し、データの変調シンボルを配置した後、一部のデータの変調シンボルはACK/NACKとRIの変調シンボルで上書きされる。
上りリンク共有チャネルに配置されたシンボルは、図4(A)のように配置した変調シンボルを、離散フーリエ変換(Discrete Fourier Transform;DFT)したシンボルである。具体的には、図4(B)において、図4(A)の変調シンボルは、DFT区間番号が小さい方の時間領域(列)から順に離散フーリエ変換し、離散フーリエ変換した周波数領域のシンボルを時間が小さい方から順に配置される。
図5は、本実施形態に係る移動局装置の構成を示す概略ブロック図である。図示するように、移動局装置a1は、上位層処理部a11、制御部a12、受信処理部a13、複数の受信アンテナ、送信処理部a14、及び、複数の送信アンテナ、を含んで構成される。また、上位層処理部a11は、無線リソース制御部a111を含んで構成される。尚、図5では、受信アンテナと送信アンテナとを別の構成としたが、信号の入出力を切り替える作用のあるサイリスタなどを用いてアンテナを共有するようにしてもよい。
制御部a12は、生成した制御信号を受信処理部a13及び送信処理部a14に出力して受信処理部a13及び送信処理部a14の制御を行う。
送信処理部a14は、生成した変調シンボルを上りリンク共用チャネル及び上りリンク制御チャネルに配置し、生成した上りリンクリファレンスシグナルと多重して、送信アンテナを介して基地局装置b1に送信する。
以下、送信処理部a14についての詳細を説明する。
図6は、本実施形態に係る移動局装置の送信処理部a14の構成を示す概略ブロック図である。図示するように、送信処理部a14は、符号化部a141、変調部a142、離散フーリエ変換部a143、上りリンクリファレンスシグナル生成部a144、多重部a145、及び、送信部a146を含んで構成される。また、符号化部a141は、ターボ符号化部a1411、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414、多重切替部a1415(キャリア要素選択部)、及びデータ/制御情報多重部a1416~a1418を含んで構成される。尚、図6は、図2に示したように、3つの上りキャリア要素を用いて、基地局装置b1と通信を行う場合を示す図である。また、送信処理部a14の各部は、制御部a12から入力される制御信号に従って処理を行う。
ACK/NACK符号化部a1413は、制御部a12から入力された共用チャネル割当情報信号に基づいて、上位層処理部a1413から入力されたACK/NACKを誤り訂正符号化し、生成した符号化ビット(ACK/NACK符号化ビットという)を、多重切替部a1415に出力する。
RI符号化部a1414は、制御部a12から入力された共用チャネル割当情報信号に基づいて、受信処理部a14から入力されたRIを誤り訂正符号化し、生成した符号化ビット(RI符号化ビットという)を、多重切替部a1415に出力する。
CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414は、共用チャネル割当情報信号が「9」である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられていないことを示すと判定した場合と、共用チャネル割当情報信号が1個、又は複数個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、自装置に対して1個、又は複数個の上りリンク共用チャネルが割り当てられていることを示すと判定した場合とで、誤り訂正符号化の切り替え処理を行なう。つまり、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414は、符号化ビットが上りリンク制御チャネル、又は上りリンク共用チャネルで送信されるかで異なる誤り訂正符号化を行なう。
多重切替部a1415は、共用チャネル割当情報信号が「9」である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられていないことを示すと判定した場合、符号化ビットの出力先を多重部a145に決定する。この場合、出力された符号化ビットは変調部(図示せず)で変調され、多重部a145で上りリンク制御チャネルに配置される。
一方、多重切替部a1415は、共用チャネル割当情報信号が1個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられた上りキャリア要素が1個であると判定した場合、符号化ビットの出力先を、当該上りリンク共用チャネルが割り当てられた上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418のうち一つに決定する。
多重切替部a1415は、以上の制御情報配置切り替え処理により決定した出力先に、符号化ビットを出力する。
データ/制御情報多重部a1418は、ターボ符号化部a1411から入力されたデータ符号化ビットと、多重切替部a1415から入力された符号化ビットと、を次のように並び換える。まず、データ/制御情報多重部a1418は、CQI/PMI符号化ビットの後方にデータ符号化ビットを結合する。次に、ACK/NACK符号化ビット及びRI符号化ビットの変調シンボルが、図4(A)に示した配置になるように、データ符号化ビットをACK/NACK符号化ビット及びRI符号化ビットで上書きする。
データ/制御情報多重部a1418は、順序を並び換えた符号化ビットを変調部a142へ出力する。尚、多重切替部a1415から符号化ビットが入力されない場合、データ/制御情報多重部a1418は、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットの挿入は行わず、データ符号化ビットのみを変調部a142へ出力する。すなわち、データ/制御情報多重部a1418は、多重切替部a1415が選択した上りキャリア要素の無線リソースに、上りリンク制御情報を配置する。
変調部a142は、生成した各上りキャリア要素の信号を、離散フーリエ変換部a143へ出力する。
上りリンクリファレンスシグナル生成部a144は、生成した上りリンクリファレンスシグナルを多重部a145へ出力する。
尚、多重部a145は、多重切替部a1415から符号化ビットを変調した信号が入力された場合、この信号を、上りリンク制御チャネルに配置する。
送信部a146は、生成したDFT-Spread OFDMシンボルに対して、ガードインターバル(Guard Interval;GI)を付加し、ベースバンドのディジタル信号を生成する。送信部a146は、生成したディジタル信号をアナログ信号に変換し、アナログ信号から中間周波数の同相成分及び直交成分を生成し、中間周波数帯域に対する余分な周波数成分を除去し、中間周波数の信号を高周波数の信号に変換(アップコンバート)し、余分な周波数成分を除去し、電力増幅し、各送信アンテナに出力して送信する。
図7は、本実施形態に係る基地局装置b1の構成を示す概略ブロック図である。図示するように、基地局装置b1は、上位層処理部b11、制御部b12、受信処理部b13、複数の受信アンテナ、送信処理部b14、及び、複数の送信アンテナ、を含んで構成される。また、上位層処理部b11は、無線リソース制御部b111を含んで構成される。尚、図7では、受信アンテナと送信アンテナとを別の構成としたが、信号の入出力を切り替える作用のあるサイリスタなどを用いてアンテナを共有するようにしてもよい。
上記の処理において、上位層処理部b11が備える無線リソース制御部b111は、上りキャリア要素を複数選択し、選択した各上りキャリア要素内の無線リソースを上りリンク制御情報又はデータ情報を配置する無線リソースとして移動局装置a1に割り当てる。無線リソース制御部b111は、当該割り当てを示す上り共用チャネル割当情報を下りリンク制御情報として、送信処理部b14を介して、移動局装置a1に送信する。
送信処理部b14は、生成した変調シンボルを下りリンク共用チャネル及び下りリンク制御チャネルに配置し、生成した下りリンクリファレンスシグナルと多重して、送信アンテナを介して移動局装置a1に送信する。
以下、受信処理部b13の詳細について説明をする。
図8は、本実施形態に係る基地局装置b1の受信処理部b13の構成を示す概略ブロック図である。図示するように、受信処理部b13は、受信部b131、多重分離部b132、伝搬路推定部b133、伝搬路補償部b134、逆離散フーリエ変換部b135、復調部b136、及び復号化部b137を含んで構成される。また、復号化部b137は、データ/制御情報多重分離部b1371~b1373、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377を含んで構成される。尚、図8は、図2に示したように、3つの上りキャリア要素を用いて、移動局装置a1と通信を行う場合を示す図である。また、受信処理部b13の各部は、制御部b12から入力される制御信号に従って処理を行う。
多重分離部b132は、分離した上りリンク制御チャネル及び上りリンク共用チャネルの信号を、伝搬路補償部b134に出力する。また、多重分離部b132は、分離した上りリンクパイロットチャネルに配置された信号(上りリンクリファレンスシグナル)を、伝搬路推定部b133に出力する。
伝搬路補償部b134は、伝搬路推定部b133から入力された伝搬路の推定値を用いて、多重分離部b132から入力された各上りキャリア要素の上りリンク制御チャネル及び上りリンク共用チャネルの信号に対して伝搬路の補償を行う。伝搬路補償部b134は、伝搬路の補償を行った信号を、逆離散フーリエ変換部b135に出力する。
データ/制御情報多重分離部b1373は、共用チャネル割当情報信号が「9」である場合、つまり、入力された情報を送信した移動局装置a1に対して上りリンク共用チャネルを割り当てていないこと示すと判定した場合、上りリンク制御チャネルの符号化ビットから上りリンク制御情報の符号化ビット(CQI/PMI符号化ビット、ACK/NACK符号化ビット、RI符号化ビット)を抽出する。尚、この場合、データ/制御情報多重分離部b1373は、上りリンク共有チャネルの符号化ビットは抽出しない。
まず、データ/制御情報多重分離部b1373は、共用チャネル割当情報信号の上りキャリア要素番号nのうち、最も大きい値の上りキャリア要素番号nを選択する。データ/制御情報多重分離部b1373は、選択した上りキャリア要素番号nが「2」であるか否かを判定する。「2」であると判定した場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。すなわち、データ/制御情報多重分離部b1373は、無線リソースが割り当てられた複数の上りキャリア要素から予め定めた規則に従って上りキャリア要素を選択し、選択した上りキャリア要素内の無線リソースに配置された上りリンク制御情報を抽出する。尚、データ/制御情報多重分離部b1372については、選択した上りキャリア要素番号nが「1」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
データ/制御情報多重分離部b1373は、以上の制御情報分離処理により分離したデータ符号化ビット、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットを、それぞれ、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377に出力する。
ACK/NACK復号化部b1376は、データ/制御情報多重分離部b1371~b1373から入力されたACK/NACK符号化ビットに対して、誤り訂正復号をし、上位層処理部b11に出力する。
RI復号化部b1377は、データ/制御情報多重分離部b1371~b1373から入力されたRI符号化ビットに対して、誤り訂正復号をし、上位層処理部b11に出力する。
CQI/PMI復号化部a1374、ACK/NACK復号化部a1376、RI復号化部a1377は、共用チャネル割当情報信号が「9」である場合、つまり、移動局装置a1に対して上りリンク共用チャネルを割り当てていないことを示すと判定した場合と、共用チャネル割当情報信号が1個、又は複数個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、移動局装置a1に対して1個、又は複数個の上りリンク共用チャネルを割り当てていることを示すと判定した場合とで、誤り訂正符号化の切り替え処理を行なう。つまり、CQI/PMI復号化部a1374、ACK/NACK復号化部a1376、RI復号化部a1377は、符号化ビットが上りリンク制御チャネル、又は上りリンク共用チャネルで送信されたかで異なる誤り訂正復号化を行なう。
以下、無線通信システムの動作について説明をする。
図9は、本実施形態に係る無線通信システムの動作の一例を示すフロー図である。
(ステップS101)基地局装置b1は、下りリンク共用チャネルを用いて移動局装置a1にデータ情報を送信する。次に、ステップS102に進む。
(ステップS102)基地局装置b1は、上りキャリア要素の上りリンク共用チャネルを移動局装置a1に割り当て、当該割り当てを示す上り共用チャネル割当情報を生成する。基地局装置b1は、生成した上り共用チャネル割当情報を下りリンク制御チャネルを用いて送信する。次に、ステップS103に進む。
(ステップS104)移動局装置a1は、ステップS101で基地局装置b1が送信した下りリンク共用チャネルのデータを受信し、受信したデータ情報に対するACK/NACKを生成する。次に、ステップS105に進む。
(ステップS107)移動局装置a1は、上りリンク共用チャネルが割り当てられている場合、データ情報、ACK/NACK、チャネル品質情報を上りリンク共用チャネルで送信する。次に、ステップS108に進む。
(ステップS108)基地局装置b1は、ステップS102で移動局装置a1に割り当てた上りリンクのキャリア要素の上りリンク共用チャネルに配置された信号を受信する。次に、ステップS109に進む。
(ステップS109)基地局装置b1は、ステップS108で受信した上りリンク共用チャネルを復調する。次に、S110に進む。
(ステップS112)基地局装置b1は、ステップS111で分離したデータ情報、ACK/NACK、チャネル品質情報を復調、及び、復号する。ステップS112の後、基地局装置b1と移動局装置a1は、上りリンク共用チャネルの送信に関する処理を終了する。
図10は、本実施形態に係る上りリンク共用チャネルの構成の一例を示す図である。図10において、横軸は時間領域、縦軸は周波数領域を示す。また、図10は、1個のサブフレームにおける上りリンク共用チャネルの構成を示す。図10は、図2に示した周波数帯域集約を用いた通信を行うときに、基地局装置b1が、ある移動局装置a1に対して、UCC-0とUCC-2に上りリンク共用チャネルを割り当てた場合の図である。
シンボルU101、U121において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU101、U121は、図4(B)のシンボルである。
シンボルU103において、ハッチングされていない領域は、データ情報の変調シンボルを示す。シンボルU123において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示し、左斜線でハッチングした領域をRIの変調シンボルを示す。また、シンボルU123において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
また、上記実施形態において、無線通信システムは、移動局装置a1と基地局装置b1とが予め定めた規則に従って1個の上りキャリア要素を選択するので、選択した1個の上りキャリア要素でのみ信号の多重又は分離を行い、他の上りキャリア要素では信号の多重及び分離を行わずにデータ情報を抽出することができ、複数の上りキャリア要素の上りリンク共用チャネルに上りリンク制御情報を配置する場合と比較して処理負荷を軽減することができる。
また、上記実施形態において、無線通信システムは、基地局装置b1が上りリンク制御情報を上りリンク共用チャネルに配置するので、上りリンク制御チャネルで上りリンク制御情報を送信する場合と比較して、送信電力を抑圧することができる。
以下、図面を参照しながら本発明の第2の実施形態について詳しく説明する。
上記第1の実施形態では、無線通信システムは、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、1個の上りキャリア要素を選択する場合について説明をした。本実施形態では、無線通信システムが、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、複数(M個)の上りキャリア要素を、上りリンク制御情報の信号を配置する上りキャリア要素として選択する場合について説明をする。
本実施形態に係る無線通信システムと第1の実施形態に係る無線通信システムとを比較すると、移動局装置の送信処理部及び基地局装置の受信処理部が異なる。しかし、他の構成要素が持つ構成及び機能は、第1の実施形態と同じであるので、第1の実施形態と同じ機能についての説明は省略する。以下、本実施形態に係る移動局装置を移動局装置a2といい、基地局装置を基地局装置b2という。
図11は、この発明の第2の実施形態に係る移動局装置a2の送信処理部a24の構成を示す概略ブロック図である。本実施形態に係る送信処理部a24(図11)と第1の実施形態に係る送信処理部a14(図6)とを比較すると、多重切替部a2415が異なる。しかし、他の構成要素(ターボ符号化部a1411、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414、データ/制御情報多重部a1416~a1418、変調部a142、離散フーリエ変換部a143、多重部a145、上りリンクリファレンスシグナル生成部a144、及び、送信部a145)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
多重切替部a2415は、共用チャネル割当情報信号が「9」である場合、符号化ビットの出力先を多重部a145に決定する。
一方、多重切替部a2415は、共用チャネル割当情報信号が1個の上りキャリア要素番号n(n=0、1、2)である場合、符号化ビットの出力先を、当該上りリンク共用チャネルが割り当てられた上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418に決定する。
また、多重切替部a2415は、共用チャネル割当情報信号が複数個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられた上りキャリア要素が複数個であると判定した場合、符号化ビットの出力先を、予め定められた配置規則に従って、以下のように決定する。
多重切替部a2415は、以上の制御情報配置切り替え処理により決定した出力先に、符号化ビットを出力する。
図12は、本実施形態に係る基地局装置b2の受信処理部b23の構成を示す概略ブロック図である。本実施形態に係る受信処理部b23(図12)と第1の実施形態に係る受信処理部b13(図8)とを比較すると、データ/制御情報多重分離部b2371~b2373が異なる。しかし、他の構成要素(受信部b131、多重分離部b132、伝搬路推定部b133、伝搬路補償部b134、逆離散フーリエ変換部b135、復調部b136、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
データ/制御情報多重分離部b2371~b2373は、それぞれ、上りキャリア要素番号0~2の上りキャリア要素に対応し、対応する上りキャリア要素に配置された信号の符号化ビットを分離する制御情報分離処理を行う。データ/制御情報多重分離部b2371~b2373が持つ機能は同じであるので、その1つ(データ/制御情報多重分離部b2373)を代表して説明する。
データ/制御情報多重分離部b2373は、共用チャネル割当情報信号が「9」である場合、上りリンク制御チャネルの符号化ビットから上りリンク制御情報の符号化ビットを抽出する。
一方、データ/制御情報多重分離部b2373は、共用チャネル割当情報信号が1個の上りキャリア要素番号「2」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
まず、データ/制御情報多重分離部b2373は、共用チャネル割当情報信号の上りキャリア要素番号nのうち、最も大きい値の上りキャリア要素番号nから値の小さくなる方へ順番に、予め定められたM個の上りキャリア要素番号nを選択する。データ/制御情報多重分離部b2373は、選択した上りキャリア要素番号nが「2」であるか否かを判定する。「2」であると判定した場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。すなわち、データ/制御情報多重分離部b2373は、複数のキャリア要素を選択する。尚、データ/制御情報多重分離部b2381、b2372については、それぞれ、選択した上りキャリア要素番号nが「0」、「1」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
データ/制御情報多重分離部b2373は、以上の制御情報分離処理により分離したデータ符号化ビット、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットを、それぞれ、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377に出力する。
図13は、本実施形態に係る上りリンク共用チャネルの構成の一例を示す図である。図13において、横軸は時間領域、縦軸は周波数領域を示す。また、図13は、1個のサブフレームにおける上りリンク共用チャネルの構成を示す。図13は、図2に示した周波数帯域集約を用いた通信を行うときに、基地局装置b2が、ある移動局装置a2に対して、UCC-0とUCC-2に上りリンク共用チャネルを割り当て、予め定めた個数MがM=2個の場合の図である。
この場合、移動局装置a2の多重切替部a2415、及び基地局装置b2のデータ/制御情報多重分離部b2371~b2373は、共用チャネル割当情報信号の上りキャリア要素番号「0」、「2」を選択する。
シンボルU201、U221において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU201、U221は、図4(B)のシンボルである。
シンボルU203、U223において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示す。また、シンボルU203、U223において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
この場合、移動局装置a2の多重切替部a2415、及び基地局装置b2のデータ/制御情報多重分離部b2371~b2373は、共用チャネル割当情報信号の上りキャリア要素番号「0」、「1」「2」のうち、値が大きい順(周波数が高い順)に上りキャリア要素番号「2」、「1」を選択する。
シンボルU301、U311、U321において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU301、U311、U321は、図4(B)のシンボルである。
シンボルU303において、ハッチングされていない領域は、データ情報の変調シンボルを示す。また、シンボルU313、U323において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示す。また、シンボルU313、U323において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
以下、図面を参照しながら本発明の第3の実施形態について詳しく説明する。
上記第1の実施形態では、無線通信システムは、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、周波数が最も高い上りキャリア要素を選択する場合について説明をした。本実施形態では、無線通信システムが、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、上りリンク共用チャネルの無線リソースの量が最も多い上りキャリア要素を選択する場合について説明をする。
本実施形態に係る無線通信システムと第1の実施形態に係る無線通信システムとを比較すると、移動局装置の送信処理部及び基地局装置の受信処理部が異なる。しかし、他の構成要素が持つ構成及び機能は、第1の実施形態と同じであるので、第1の実施形態と同じ機能についての説明は省略する。以下、本実施形態に係る移動局装置を移動局装置a3といい、基地局装置を基地局装置b3という。
図15は、この発明の第3の実施形態に係る移動局装置a3の送信処理部a34の構成を示す概略ブロック図である。本実施形態に係る送信処理部a34(図15)と第1の実施形態に係る送信処理部a14(図6)とを比較すると、多重切替部a3415が異なる。しかし、他の構成要素(ターボ符号化部a1411、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414、データ/制御情報多重部a1416~a1418、変調部a142、離散フーリエ変換部a143、多重部a145、上りリンクリファレンスシグナル生成部a144、及び、送信部a145)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
多重切替部a3415は、共用チャネル割当情報信号が「9」である場合、符号化ビットの出力先を多重部a145に決定する。
一方、多重切替部a3415は、共用チャネル割当情報信号が1個の上りキャリア要素番号n(n=0、1、2)である場合、符号化ビットの出力先を、当該上りリンク共用チャネルが割り当てられた上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418に決定する。
また、多重切替部a3415は、共用チャネル割当情報信号が複数個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられた上りキャリア要素が複数個であると判定した場合、符号化ビットの出力先を、予め定められた配置規則に従って、以下のように決定する。
多重切替部a3415は、以上の制御情報配置切り替え処理により決定した出力先に、符号化ビットを出力する。
図16は、本実施形態に係る基地局装置b3の受信処理部b33の構成を示す概略ブロック図である。本実施形態に係る受信処理部b33(図16)と第1の実施形態に係る受信処理部b13(図8)とを比較すると、データ/制御情報多重分離部b3371~b3373が異なる。しかし、他の構成要素(受信部b131、多重分離部b132、伝搬路推定部b133、伝搬路補償部b134、逆離散フーリエ変換部b135、復調部b136、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
データ/制御情報多重分離部b3371~b3373は、それぞれ、上りキャリア要素番号0~2の上りキャリア要素に対応し、対応する上りキャリア要素に配置された信号の符号化ビットを分離する制御情報分離処理を行う。データ/制御情報多重分離部b3371~b3373が持つ機能は同じであるので、その1つ(データ/制御情報多重分離部b3373)を代表して説明する。
データ/制御情報多重分離部b3373は、共用チャネル割当情報信号が「9」である場合、上りリンク制御チャネルの符号化ビットから上りリンク制御情報の符号化ビットを抽出する。
一方、データ/制御情報多重分離部b3373は、共用チャネル割当情報信号が1個の上りキャリア要素番号「2」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
まず、データ/制御情報多重分離部b3373は、共用チャネル割当情報信号の上りキャリア要素番号nのうち、割り当てられた上りリンク共用チャネルの無線リソースの量が最も多い上りキャリア要素の上りキャリア要素番号nを選択する。データ/制御情報多重分離部b3373は、選択した上りキャリア要素番号nが「2」であるか否かを判定する。「2」であると判定した場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。すなわち、データ/制御情報多重分離部b3373は、無線リソースが割り当てられた複数の上りキャリア要素のうち、上りキャリア要素内に割り当てられた上りリンク共用チャネルの無線リソースの量が最も多い上りキャリア要素を選択する。尚、データ/制御情報多重分離部b3381、b3372については、それぞれ、選択した上りキャリア要素番号nが「0」、「1」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
データ/制御情報多重分離部b3373は、以上の制御情報分離処理により分離したデータ符号化ビット、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットを、それぞれ、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377に出力する。
図17は、本実施形態に係る上りリンク共用チャネルの構成の一例を示す図である。図17において、横軸は時間領域、縦軸は周波数領域を示す。また、図17は、1個のサブフレームにおける上りリンク共用チャネルの構成を示す。図17は、図2に示した周波数帯域集約を用いた通信を行うときに、基地局装置b3が、ある移動局装置a3に対して、UCC-0とUCC-2に上りリンク共用チャネルを割り当てた場合の図である。
この場合、移動局装置a3の多重切替部a3415、及び基地局装置b3のデータ/制御情報多重分離部b3371~b3373は、共用チャネル割当情報信号の上りキャリア要素番号「0」を選択する。
シンボルU401、U421において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU401、U421は、図4(B)のシンボルである。
シンボルU403において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示す。また、シンボルU403において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
シンボルU423において、ハッチングされていない領域は、データ情報の変調シンボルを示す。
以下、図面を参照しながら本発明の第4の実施形態について詳しく説明する。
上記第1の実施形態では、無線通信システムは、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、周波数が最も高い上りキャリア要素を選択する場合について説明をした。本実施形態では、無線通信システムが、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、上りリンク共用チャネルの変調方式と符号化率に基づいて選択する場合について説明をする。
本実施形態に係る無線通信システムと第1の実施形態に係る無線通信システムとを比較すると、移動局装置の送信処理部及び基地局装置の受信処理部が異なる。しかし、他の構成要素が持つ構成及び機能は、第1の実施形態と同じであるので、第1の実施形態と同じ機能についての説明は省略する。以下、本実施形態に係る移動局装置を移動局装置a4といい、基地局装置を基地局装置b4という。
図18は、この発明の第4の実施形態に係る移動局装置a4の送信処理部a44の構成を示す概略ブロック図である。本実施形態に係る送信処理部a44(図18)と第1の実施形態に係る送信処理部a14(図6)とを比較すると、多重切替部a4415が異なる。しかし、他の構成要素(ターボ符号化部a1411、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414、データ/制御情報多重部a1416~a1418、変調部a142、離散フーリエ変換部a143、多重部a145、上りリンクリファレンスシグナル生成部a144、及び、送信部a145)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
多重切替部a4415は、共用チャネル割当情報信号が「9」である場合、符号化ビットの出力先を多重部a145に決定する。
一方、多重切替部a4415は、共用チャネル割当情報信号が1個の上りキャリア要素番号n(n=0、1、2)である場合、符号化ビットの出力先を、当該上りリンク共用チャネルが割り当てられた上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418に決定する。
また、多重切替部a4415は、共用チャネル割当情報信号が複数個の上りキャリア要素番号n(n=0、1、2)である場合、つまり、自装置に対する上りリンク共用チャネルが割り当てられた上りキャリア要素が複数個であると判定した場合、符号化ビットの出力先を、予め定められた配置規則に従って、以下のように決定する。
具体的に、多重切替部a4415は、割り当てられた各上りキャリア要素の上りリンク共用チャネルの符号化率を算出し、変調方式の変調多値数が最も小さく、算出した符号化率が最も低い上りキャリア要素の上りキャリア要素番号nを選択する。また、多重切替部a4415は、基地局装置b4が送信した上り共用チャネル割当情報などに含まれる変調方式と符号化率を算出するための情報に基づいて、上りキャリア要素の上りキャリア要素番号nを選択してもよい。すなわち、多重切替部a4415は、無線リソースが割り当てられた複数の上りキャリア要素のうち、上りキャリア要素内に割り当てられた上りリンク共用チャネルの変調多値数が最も小さく、符号化率が最も低い上りキャリア要素を選択する。多重切替部a4415は、選択した上りキャリア要素番号nの上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418に、符号化ビットの出力先を決定する。
多重切替部a4415は、以上の制御情報配置切り替え処理により決定した出力先に、符号化ビットを出力する。
図19は、本実施形態に係る基地局装置b4の受信処理部b43の構成を示す概略ブロック図である。本実施形態に係る受信処理部b43(図19)と第1の実施形態に係る受信処理部b13(図8)とを比較すると、データ/制御情報多重分離部b4371~b4373が異なる。しかし、他の構成要素(受信部b131、多重分離部b132、伝搬路推定部b133、伝搬路補償部b134、逆離散フーリエ変換部b135、復調部b136、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
データ/制御情報多重分離部b4371~b4373は、それぞれ、上りキャリア要素番号0~2の上りキャリア要素に対応し、対応する上りキャリア要素に配置された信号の符号化ビットを分離する制御情報分離処理を行う。データ/制御情報多重分離部b4371~b4373が持つ機能は同じであるので、その1つ(データ/制御情報多重分離部b4373)を代表して説明する。
データ/制御情報多重分離部b4373は、共用チャネル割当情報信号が「9」である場合、上りリンク制御チャネルの符号化ビットから上りリンク制御情報の符号化ビットを抽出する。
一方、データ/制御情報多重分離部b4373は、共用チャネル割当情報信号が1個の上りキャリア要素番号「2」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
まず、データ/制御情報多重分離部b4373は、共用チャネル割当情報信号の上りキャリア要素番号nのうち、割り当てられた上りリンク共用チャネルの符号化率が最も低く、変調多値数が小さい上りキャリア要素の上りキャリア要素番号nを選択する。データ/制御情報多重分離部b4373は、選択した上りキャリア要素番号nが「2」であるか否かを判定する。「2」であると判定した場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。すなわち、データ/制御情報多重分離部b4373は、無線リソースが割り当てられた複数の上りキャリア要素のうち、割り当てられた上りリンク共用チャネルの符号化率が最も低く、変調多値数が小さい上りキャリア要素を選択する。尚、データ/制御情報多重分離部b4381、b4372については、それぞれ、選択した上りキャリア要素番号nが「0」、「1」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
データ/制御情報多重分離部b4373は、以上の制御情報分離処理により分離したデータ符号化ビット、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットを、それぞれ、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377に出力する。
図20は、本実施形態に係る上りリンク共用チャネルの構成の一例を示す図である。図20において、横軸は時間領域、縦軸は周波数領域を示す。また、図20は、1個のサブフレームにおける上りリンク共用チャネルの構成を示す。図20は、図2に示した周波数帯域集約を用いた通信を行うときに、基地局装置b4が、ある移動局装置a4に対して、UCC-0とUCC-2に上りリンク共用チャネルを割り当てた場合の図である。
この場合、移動局装置a3の多重切替部a4415、及び基地局装置b4のデータ/制御情報多重分離部b4371~b4373は、共用チャネル割当情報信号の上りキャリア要素番号「0」を選択する。
シンボルU501、U521において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU501、U521は、図4(B)のシンボルである。
シンボルU503において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示す。また、シンボルU503において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
シンボルU523において、ハッチングされていない領域は、データ情報の変調シンボルを示す。
以下、図面を参照しながら本発明の第5の実施形態について詳しく説明する。
上記第1の実施形態では、無線通信システムは、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、周波数が最も高い上りキャリア要素を選択する場合について説明をした。本実施形態では、無線通信システムが、上りリンク共用チャネルを割り当てた上りキャリア要素のうち、基地局装置が選択し、移動局装置に通知した上りキャリア要素を優先的に選択する場合について説明をする。基地局装置は、各上りキャリア要素で受信した上りリンク共用チャネル、及び上りリンクリファレンスシグナルなどの信号を基に各上りキャリア要素の伝搬路の品質を測定し、品質の良い上りキャリア要素を選択し、選択した上りキャリア要素の上りキャリア要素番号を、移動局装置に通知する。
本実施形態に係る無線通信システムと第1の実施形態に係る無線通信システムとを比較すると、移動局装置の送信処理部及び基地局装置が異なる。しかし、他の構成要素が持つ構成及び機能は、第1の実施形態と同じであるので、第1の実施形態と同じ機能についての説明は省略する。以下、本実施形態に係る移動局装置を移動局装置a5といい、基地局装置を基地局装置b5という。
図21は、この発明の第5の実施形態に係る移動局装置a5の送信処理部a54の構成を示す概略ブロック図である。本実施形態に係る送信処理部a54(図21)と第1の実施形態に係る送信処理部a14(図6)とを比較すると、多重切替部a5415が異なる。しかし、他の構成要素(ターボ符号化部a1411、CQI/PMI符号化部a1412、ACK/NACK符号化部a1413、RI符号化部a1414、データ/制御情報多重部a1416~a1418、変調部a142、離散フーリエ変換部a143、多重部a145、上りリンクリファレンスシグナル生成部a144、及び、送信部a145)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
多重切替部a5415は、共用チャネル割当情報信号が「9」である場合、符号化ビットの出力先を多重部a145に決定する。
一方、多重切替部a5415は、共用チャネル割当情報信号が「9」でない場合、予め基地局装置b5から通知された上りキャリア要素の上りキャリア要素番号nを選択する。すなわち、多重切替部a5415は、無線リソースが割り当てられた複数の上りキャリア要素のうち、予め基地局装置b5から通知された上りキャリア要素を優先的に選択する。多重切替部a5415は、基地局装置b5から通知された上りキャリア要素に対応するデータ/制御情報多重部a1416~a1418に、符号化ビットの出力先を決定する。
多重切替部a5415は、以上の制御情報配置切り替え処理により決定した出力先に、符号化ビットを出力する。
図22は、本実施形態に係る基地局装置b5の構成を示す概略ブロック図である。
本実施形態に係る基地局装置b5(図22)と第1の実施形態に係る基地局装置b1(図7)とを比較すると、上位層b51のキャリア要素通知部b512(キャリア要素選択部)及び受信処理部b53が異なる。しかし、他の構成要素(無線リソース制御部b111、制御部b12及び送信処理部b14)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
キャリア要素通知部b512は、選択した上りキャリア要素の上りキャリア要素番号nを、送信処理部b14を介して移動局装置a5に通知する。また、キャリア要素通知部b512は、選択した上りキャリア要素の上りキャリア要素番号nを、制御部b12を介して受信処理b53に出力する。
図23は、本実施形態に係る基地局装置b5の受信処理部b53の構成を示す概略ブロック図である。本実施形態に係る受信処理部b53(図19)と第1の実施形態に係る受信処理部b13(図8)とを比較すると、データ/制御情報多重分離部b5371~b5373が異なる。しかし、他の構成要素(受信部b131、多重分離部b132、伝搬路推定部b133、伝搬路補償部b134、逆離散フーリエ変換部b135、復調部b136、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377)が持つ機能は第1の実施形態と同じである。第1の実施形態と同じ機能の説明は省略する。
データ/制御情報多重分離部b5371~b5373は、それぞれ、上りキャリア要素番号0~2の上りキャリア要素に対応し、対応する上りキャリア要素に配置された信号の符号化ビットを分離する制御情報分離処理を行う。データ/制御情報多重分離部b5371~b5373が持つ機能は同じであるので、その1つ(データ/制御情報多重分離部b4373)を代表して説明する。
データ/制御情報多重分離部b5373は、共用チャネル割当情報信号が「9」である場合、上りリンク制御チャネルの符号化ビットから上りリンク制御情報の符号化ビットを抽出する。
一方、データ/制御情報多重分離部b5373は、共用チャネル割当情報信号が「9」でない場合、キャリア要素通知部b512から入力された上りキャリア要素番号nが「2」であるか否かを判定する。「2」であると判定した場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。すなわち、データ/制御情報多重分離部b5373は、無線リソースが割り当てられた複数の上りキャリア要素のうち、予め移動局装置a5が通知した上りキャリア要素を優先的に選択する。尚、データ/制御情報多重分離部b5381、b5372については、それぞれ、選択した上りキャリア要素番号nが「0」、「1」である場合、図4(A)の割り当てに従って、上りリンク共用チャネルの符号化ビットを分離する。
データ/制御情報多重分離部b5373は、以上の制御情報分離処理により分離したデータ符号化ビット、CQI/PMI符号化ビット、ACK/NACK符号化ビット、及びRI符号化ビットを、それぞれ、ターボ復号化部b1374、CQI/PMI復号化部b1375、ACK/NACK復号化部b1376、及びRI復号化部b1377に出力する。
図24は、本実施形態に係る上りリンク共用チャネルの構成の一例を示す図である。図24において、横軸は時間領域、縦軸は周波数領域を示す。また、図24は、1個のサブフレームにおける上りリンク共用チャネルの構成を示す。図24は、図2に示した周波数帯域集約を用いた通信を行うときに、基地局装置b5が、ある移動局装置a5に対して、UCC-0とUCC-2に上りリンク共用チャネルを割り当てた場合の図である。
この場合、移動局装置a5の多重切替部a5415、及び基地局装置b5のデータ/制御情報多重分離部b5371~b5373は、共用チャネル割当情報信号の上りキャリア要素番号「0」を選択する。
シンボルU601、U621において、右斜線でハッチングされた領域は上りリンク共有チャネルに配置されたシンボルを示し、点でハッチングされた領域は上りリンクリファレンスシグナルを示す。このシンボルU601、U621は、図4(B)のシンボルである。
シンボルU603において、斜めの格子状の線でハッチングされた領域は、ACK/NACKの変調シンボルを示す。また、シンボルU603において、左斜線でハッチングされた領域は、CQI又はPMIの変調シンボルを示し、ハッチングされていない領域は、データ情報の変調シンボルを示す。
シンボルU623において、ハッチングされていない領域は、データ情報の変調シンボルを示す。
また、予め定めた優先順序、例えば、基地局装置b1での上りキャリア要素の信号の復調又は復号処理の順序、に従って、上りリンク制御情報の信号を配置する上りキャリア要素を、上りリンク制御情報の信号を配置する上りキャリア要素として選択してもよい。例えば、基地局装置b1での復号処理の順序が最も早い上りキャリア要素の上りリンク共用チャネルを選択した場合、基地局装置b1で上りリンク制御情報を早く復号することができ、迅速に通信の制御を行うことができる。尚、基地局装置b1での復号処理の順序が最も早い上りキャリア要素の上りリンク共用チャネルは、周波数の最も高い、又は、低いキャリア要素に対応する上りリンク共用チャネルとしてもよい。
また、上記第2の実施形態において、移動局装置a2及び基地局装置b2が選択する上りキャリア要素の数を2個までに限定する、又は5個までに拡張するなどしてもよい。また、上記各実施形態において、上りキャリア要素は3個でなくてもよく、例えば、4個以上であってもよい。
また、上りキャリア要素内に割り当てられた上りリンク共用チャネルの無線リソースの量、及び符号化率、変調方式から算出できる、上りリンク共用チャネルのデータ情報の量に基づいて、上りリンク制御情報の信号を配置する上りキャリア要素を選択してもよい。これにより、無線リソースの量は多いが符号化率が高い上りリンク共用チャネル、又は符号化率が低いが無線リソースの量が少ない上りリンク共用チャネルなどに上りリンク制御情報の信号を配置することなく、無線リソースの量、符号化率、変調多値数を総合的に判断して、上りリンク制御情報の信号の特性が良くなる上りリンク共用チャネルを選択することができる。
また、移動局装置a4及び基地局装置b4は、上りキャリア要素内に割り当てた上りリンク共用チャネルのうち、まず、変調多値数が最も小さいキャリア要素を選択し、変調多値数が最も小さいキャリア要素が複数ある場合には、符号化率が最も低い上りキャリア要素を、上りリンク制御情報の信号を配置する上りキャリア要素として選択してもよい。また、移動局装置a4及び基地局装置b4は、上りキャリア要素内に割り当てた上りリンク共用チャネルのうち、まず、符号化率が最も低い上りキャリア要素を選択し、符号化率が最も低い上りキャリア要素が複数ある場合には、変調多値数が最も小さいキャリア要素を、上りリンク制御情報の信号を配置する上りキャリア要素として選択してもよい。
Claims (14)
- 第1の通信装置と第2の通信装置が無線通信を行う無線通信システムにおいて、
前記第2の通信装置は、複数のトランスポートブロックのための複数の無線リソースを前記第1の通信装置に割り当て、
前記第1の通信装置は、上りリンク制御情報を送信する必要がある場合は、前記割り当てられた複数の無線リソースのうち、1つの無線リソースに前記上りリンク制御情報を配置して送信し、
前記第2の通信装置は、前記1つの無線リソースに配置された上りリンク制御情報を抽出することを特徴とする無線通信システム。 - 前記上りリンク制御情報を配置する1つの無線リソースは、前記第2の通信装置が選択し、前記第1の通信装置に通知するコンポーネントキャリアの無線リソースであることを特徴とする請求項1に記載の無線通信システム。
- 前記上りリンク制御情報を配置する1つの無線リソースは、前記第2の通信装置から通知される無線リソースそれぞれに対する下りリンク制御情報に基づいて、前記第1の通信装置によって選択されることを特徴とする請求項1に記載の無線通信システム。
- 前記下りリンク制御情報は、変調方式に関する情報を含むことを特徴とする請求項3に記載の無線通信システム。
- 前記下りリンク制御情報は、符号化率に関する情報を含むことを特徴とする請求項3に記載の無線通信システム。
- 前記下りリンク制御情報は、無線リソース量に関する情報を含むことを特徴とする請求項3に記載の無線通信システム。
- 前記下りリンク制御情報は、トランスポートブロックの量に関する情報を含むことを特徴とする請求項3に記載の無線通信システム。
- 前記上りリンク制御情報を配置する1つの無線リソースは、前記無線リソースの周波数の高さに基づいて、前記第1の通信装置によって選択されることを特徴とする請求項1に記載の無線通信システム。
- 第2の通信装置と無線通信を行う第1の通信装置において、
上りリンク制御情報を送信する必要がある場合は、前記第2の通信装置に割り当てられた複数の無線リソースのうち、1つの無線リソースに前記上りリンク制御情報を配置して送信することを特徴とする第1の通信装置。 - 第1の通信装置と無線通信を行う第2の通信装置において、
複数の無線リソースを前記第1の通信装置に割り当て、
前記第1の通信装置が、前記割り当てられた複数の無線リソースのうち、1つの無線リソースに配置して送信した上りリンク制御情報を、受信して抽出することを特徴とする第2の通信装置。 - 第2の通信装置と無線通信を行う第1の通信装置における通信方法において、
前記第1の通信装置が、上りリンク制御情報を送信する必要がある場合は、前記第2の通信装置に割り当てられた複数の無線リソースのうち、1つの無線リソースに前記上りリンク制御情報を配置して送信する過程を有することを特徴とする通信方法。 - 第1の通信装置と無線通信を行う第2の通信装置における通信方法において、
前記第2の通信装置が、複数の無線リソースを前記第1の通信装置に割り当てる過程と、
前記第2の通信装置が、前記第1の通信装置が前記割り当てられた複数の無線リソースのうち1つの無線リソースに配置して送信した上りリンク制御情報を、受信して抽出する過程と、
を有することを特徴とする通信方法。 - 第2の通信装置と無線通信を行う第1の通信装置のコンピュータを、
上りリンク制御情報を送信する必要がある場合は、前記第2の通信装置に割り当てられた複数の無線リソースのうち、1つの無線リソースに前記上りリンク制御情報を配置して送信する手段として機能させることを特徴とする通信プログラム。 - 第1の通信装置と無線通信を行う第2の通信装置における通信方法において、
複数の無線リソースを前記第1の通信装置に割り当てる手段、
前記第1の通信装置が、前記割り当てた複数の無線リソースのうち、1つの無線リソースに配置して送信した上りリンク制御情報を、受信して抽出する手段、
として機能させることを特徴とする通信プログラム。
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CN103945547B (zh) | 2017-09-08 |
CA2758216A1 (en) | 2010-10-28 |
JP2014220835A (ja) | 2014-11-20 |
KR101357350B1 (ko) | 2014-02-03 |
JP5629924B2 (ja) | 2014-11-26 |
AU2010240406B2 (en) | 2014-08-21 |
US20120044893A1 (en) | 2012-02-23 |
JP4965740B2 (ja) | 2012-07-04 |
KR20120004458A (ko) | 2012-01-12 |
JP5706027B2 (ja) | 2015-04-22 |
US20130077588A1 (en) | 2013-03-28 |
US20150237581A1 (en) | 2015-08-20 |
CN103945547A (zh) | 2014-07-23 |
CN102405680A (zh) | 2012-04-04 |
JP2015133731A (ja) | 2015-07-23 |
EP2424319A1 (en) | 2012-02-29 |
US9055571B2 (en) | 2015-06-09 |
AU2010240406A1 (en) | 2011-11-10 |
US20160205698A1 (en) | 2016-07-14 |
US9326243B2 (en) | 2016-04-26 |
US8340043B2 (en) | 2012-12-25 |
CN102405680B (zh) | 2015-06-03 |
JPWO2010122722A1 (ja) | 2012-10-25 |
EP2424319A4 (en) | 2012-08-15 |
JP5927684B2 (ja) | 2016-06-01 |
US9883519B2 (en) | 2018-01-30 |
CA2758216C (en) | 2016-08-02 |
JP2012124971A (ja) | 2012-06-28 |
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