WO2009119818A1 - 無線リソース選択方法、移動局及び無線基地局 - Google Patents
無線リソース選択方法、移動局及び無線基地局 Download PDFInfo
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- WO2009119818A1 WO2009119818A1 PCT/JP2009/056321 JP2009056321W WO2009119818A1 WO 2009119818 A1 WO2009119818 A1 WO 2009119818A1 JP 2009056321 W JP2009056321 W JP 2009056321W WO 2009119818 A1 WO2009119818 A1 WO 2009119818A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
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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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1838—Buffer management for semi-reliable protocols, e.g. for less sensitive applications such as streaming video
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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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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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
Definitions
- a mobile station receives downlink data transmitted from a radio base station using downlink radio resources that are fixedly allocated in a first period starting from the first allocation start time, and is fixedly
- the present invention relates to a radio resource selection method, a mobile station, and a radio base station that transmit acknowledgment information for the downlink data using an allocated uplink radio resource.
- LTE Long Term Evolution
- OFDMA Orthogonal Frequency Multiple Access
- SC-FDMA Single-Carrier Frequency Multiple Access
- OFDMA is a system in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is transmitted on each frequency band, and the subcarriers interfere with each other even though they partially overlap on the frequency. By arranging them closely, it is possible to achieve high-speed transmission and increase frequency utilization efficiency.
- SC-FDMA is a transmission method that can reduce interference between terminals by dividing a frequency band and performing transmission using different frequency bands among a plurality of terminals. Since SC-FDMA has a feature that variation in transmission power becomes small, it is possible to realize low power consumption and wide coverage of a terminal.
- the LTE system is a system that performs communication by sharing one or more physical channels between a plurality of mobile stations in both uplink and downlink.
- a channel shared by a plurality of mobile stations is generally referred to as a shared channel.
- a physical uplink shared channel Physical Uplink Shared Channel: PUSCH
- Physical downlink shared channel Physical Downlink Shared Channel: PDSCH
- the shared channel is a “uplink shared channel (UL-SCH)” in the uplink as a transport channel, and a “downlink shared channel (DL-SCH: Downlink) in the downlink. Shared Channel) ”.
- UL-SCH uplink shared channel
- DL-SCH Downlink shared channel
- the mobile station UE to which the shared channel is allocated is selected and selected for each subframe (sub-frame) (1 ms in the LTE scheme). It is necessary to signal the allocated mobile station UE to allocate a shared channel.
- the control channel used for this signaling is “physical downlink control channel (PDCCH: Physical Downlink Control Channel)” or “downlink L1 / L2 Control Channel (DL L1 / L2 Control Channel: Downlink L1 / L) in the LTE scheme. L2 Control Channel) ”.
- PDCCH Physical Downlink Control Channel
- DL L1 / L2 Control Channel Downlink L1 / L
- L2 Control Channel L2 Control Channel
- the above-described process of selecting which mobile station UE is assigned a shared channel for each subframe is generally called “scheduling”.
- the mobile station UE to which a shared channel is dynamically allocated is selected for each subframe, it may be referred to as “Dynamic scheduling”.
- the above-mentioned “allocating a shared channel” may be expressed as “allocating radio resources for the shared channel”.
- the physical downlink control channel information includes, for example, “downlink scheduling information”, “uplink scheduling grant”, and the like.
- Downlink Scheduling Information includes, for example, downlink resource block (Resource Block) allocation information, UE ID, number of streams, information on precoding vector (Precoding Vector), data size regarding downlink shared channels. , Modulation scheme, HARQ (hybrid automatic repeat request) information, and the like.
- Uplink Scheduling Grant includes, for example, uplink resource block (Resource Block) allocation information, UE ID, data size, modulation scheme, uplink transmission power information, Uplink regarding the uplink shared channel.
- Information on demodulation reference signal (demodulation reference signal) in MIMO is included.
- DCI Downlink Control Information
- HARQ is applied in communication using the above-described shared channel.
- the mobile station UE decodes the downlink shared channel, and sends acknowledgment information (Acknowledgement information: ACK / NACK) based on the decoding result (CRC check result) to the uplink control channel.
- PUCCH Physical Uplink Control Channel
- PUCCH Physical Uplink Control Channel
- the radio base station eNB performs retransmission control according to the contents of the delivery confirmation information.
- the content of the delivery confirmation information is expressed by either an acknowledgment (ACK) indicating that the transmission signal has been properly received or a negative response (NACK) indicating that the transmission signal has not been properly received.
- ACK acknowledgment
- NACK negative response
- FIG. 8 illustrates downlink “Dynamic scheduling” and HARQ processing in the above-described LTE mobile communication system.
- the radio base station eNB transmits downlink scheduling information to the mobile station UE via the PDCCH and transmits downlink data via the PDSCH.
- the mobile station UE receives downlink data via the PDSCH based on downlink scheduling information received via the PDCCH.
- the mobile station UE uses PUCCH to transmit acknowledgment information for the downlink data, and the radio base station eNB receives the acknowledgment information (ACK / NACK) mapped to the PUCCH.
- the above-described PDSCH radio resources are dynamically allocated because they are notified by the PDCCH.
- the PUCCH radio resource is associated with the PDCCH radio resource number. Since the PDCCH radio resources are dynamically allocated, the PUCCH radio resources are also dynamically allocated as a result.
- the radio base station eNB transmits downlink data addressed to the mobile station UE to the mobile station UE by PDCCH.
- An uplink radio resource for transmitting the resource and acknowledgment information for the downlink data is dynamically allocated.
- the time difference between the subframe in which the PDCCH signal and the PDSCH signal are transmitted and the subframe in which the PUCCH signal is transmitted is fixed.
- the radio base station eNB transmits the sub-scheduling information to the mobile station UE via the PDCCH (first allocation start time).
- the above-described downlink radio resource (PDSCH) is fixedly allocated to the mobile station in the first period, and the above-described uplink radio resource (PUCCH) is fixed by upper layer (RRC: Radio Resource Control) signaling.
- RRC Radio Resource Control
- the uplink radio resource (PUCCH) in “Persistent scheduling” is fixedly allocated to the mobile station UE by higher layer (RRC) signaling.
- the uplink radio resource is, for example, a code resource in code multiplexing or a frequency resource in frequency multiplexing.
- the frequency resource may be specified by the resource block number of the resource block (subcarrier set) in which the PUCCH is transmitted.
- the uplink radio resource may be designated by a predetermined identification number.
- a cyclic shift amount in multiplexing by cyclic shift of a CAZAC sequence and an orthogonal cover number in block spreading may be specified by the identification number.
- the time difference between the time point when the downlink radio resource (PDSCH) is assigned and the time point when the uplink radio resource (PUCCH) is assigned is fixed, and the first assignment start time point is designated by the PDCCH.
- the above-described downlink radio resource (PDSCH) is fixedly assigned with a period of 20 ms, and the above-described uplink radio resource (PUCCH) is fixed to each downlink radio resource (PDSCH). Assigned to.
- downlink radio resources PDSCH
- delivery confirmation information is transmitted in subframes # 7, # 27,.
- the first allocation start time is designated by the PDCCH.
- the time difference between the time point when the downlink radio resource (PDSCH) is allocated and the time point when the uplink radio resource (PUCCH) is allocated is a predetermined period (for example, 4 subframes). Has been.
- the timing at which the uplink radio resource (PUCCH) is assigned is also changed in the same manner.
- uplink radio resources such as code resources in code multiplexing and frequency resources in frequency multiplexing are superior. Since the mobile station UE is fixedly assigned by layer signaling, uplink radio resources (PUCCH) such as the code resource and the frequency resource are not changed.
- the time difference between the time point when the downlink radio resource (PDSCH) is allocated and the time point when the uplink radio resource (PUCCH) is allocated is fixed, and the uplink radio resource (PUCCH) is set in advance. Therefore, there is a problem that the timing of the downlink radio resource (PDSCH) allocated by “Persistent scheduling” cannot be freely changed.
- the present invention has been made in view of the above-described problems, and a radio resource selection method, a mobile station, and a mobile station that can flexibly set the timing of a downlink radio resource (PDSCH) allocated by “Persistent scheduling”.
- PDSCH downlink radio resource
- a first feature of the present invention is that a mobile station receives downlink data transmitted from a radio base station using downlink radio resources that are fixedly allocated in a first period starting from the first allocation start time. And, a mobile communication method for transmitting acknowledgment information for the downlink data using fixedly allocated uplink radio resources, wherein the radio base station transmits the first period to the mobile station And a step A for notifying information on the uplink radio resource, and when the mobile station receives a fixed allocation signal from the radio base station, determines a first allocation start time and starts the first allocation. Starting from a point in time, and receiving the downlink data via the downlink radio resource and transmitting the delivery confirmation information via the uplink radio resource. Manner by adjustment signal included in the assignment signal to adjust the uplink radio resource via an adjusted said uplink radio resources and summarized in that for transmitting the acknowledgment information.
- the information on the uplink radio resource may be a block spreading orthogonal cover sequence number and an identification number designating a cyclic shift amount of a CAZAC sequence.
- the uplink radio resource may be adjusted by changing the identification number according to the adjustment signal.
- the signal format of the fixed allocation signal and the signal format of the dynamic allocation signal used in scheduling in which downlink radio resources are dynamically allocated are the same.
- the adjustment signal may be notified by a power control command in the dynamic allocation signal or a bit designating HARQ Redundancy Version.
- the first feature of the present invention is that a reception state of a downlink signal fixedly allocated from a plurality of radio resources continuously defined on a radio resource space formed by a frequency axis and a code axis.
- a radio resource selection method for semi-fixingly selecting a radio resource to be allocated to an uplink response signal indicated by the radio response signal, for identifying an allocated radio resource to be allocated to the uplink response signal from the plurality of radio resources Including a step A for generating the specific information, a step B for notifying the generated specific information, and a step C for selecting an assigned radio resource based on the notified specific information.
- radio resources are classified into a plurality of groups, a group including one or more unused allocated radio resources is specified as the specifying information.
- a reference specific information because, the gist to generate the one or more relative specific information relative positions on the one or more allocated radio resources of the radio resource space is shown in in the group.
- downlink data transmitted from a radio base station is received using a downlink radio resource that is fixedly allocated in a first period starting from the first allocation start time, and is fixed.
- a mobile station configured to transmit acknowledgment information for the downlink data using an uplink radio resource allocated to the radio base station, the mobile station from the first period and the uplink radio resource
- a fixed communication information receiving unit configured to receive information and a fixed allocation signal from the radio base station, the first allocation start time is determined, and the first allocation start time is determined.
- a communication unit configured to receive the downlink data via the downlink radio resource and to transmit the delivery confirmation information via the uplink radio resource.
- the communication unit is configured to adjust the uplink radio resource by an adjustment signal included in the fixed assignment signal and transmit the delivery confirmation information via the adjusted uplink radio resource. Is the gist.
- the information on the uplink radio resource may be a block spreading orthogonal cover sequence number and an identification number designating a cyclic shift amount of the CAZAC sequence.
- the communication unit may be configured to adjust the uplink radio resource by changing the identification number according to the adjustment signal.
- the communication unit when the signal format of the fixed allocation signal and the signal format of the dynamic allocation signal used in scheduling in which downlink radio resources are dynamically allocated are the same, the communication unit May be configured to acquire the adjustment signal based on a power control command in the dynamic allocation signal or a bit designating a HARQ Redundancy Version.
- the specific information includes a group including one or more unused allocated radio resources.
- a third feature of the present invention is that a mobile station receives downlink data transmitted from a radio base station using downlink radio resources that are fixedly assigned in a first period starting from the first assignment start time. And a radio base station used in a mobile communication system for transmitting acknowledgment information for the downlink data using fixedly allocated uplink radio resources, wherein the mobile station transmits the first period and A fixed communication information transmitting unit configured to notify information related to the uplink radio resource, and a fixed allocation signal transmission configured to transmit a fixed allocation signal to the mobile station And the transmission of the downlink data via the downlink radio resource starting from the first allocation start time determined by the fixed allocation signal and the uplink radio resource A communication unit configured to receive the delivery confirmation information, wherein the communication unit adjusts the uplink radio resource according to an adjustment signal included in the fixed allocation signal, and adjusts the adjusted uplink radio resource.
- the gist is that the delivery confirmation information is received via an uplink radio resource.
- the information on the uplink radio resource may be a block spreading orthogonal cover sequence number and an identification number designating a cyclic shift amount of the CAZAC sequence.
- the communication unit may be configured to adjust the uplink radio resource by changing the identification number according to the adjustment signal.
- the communication unit when the signal format of the fixed allocation signal and the signal format of the dynamic allocation signal used in scheduling in which downlink radio resources are dynamically allocated are the same, the communication unit May be configured to notify the adjustment signal by a power control command in the dynamic allocation signal or a bit designating HARQ Redundancy Version.
- the fixed allocation signal transmission unit is configured to set the adjustment signal so that the uplink radio resource does not collide with an uplink radio resource allocated to another mobile station. May be.
- the third feature of the present invention is that a reception state of a fixedly assigned downlink signal from a plurality of radio resources continuously defined on a radio resource space formed by a frequency axis and a code axis.
- a radio base station for semi-fixingly selecting a radio resource to be allocated to the uplink response signal indicated by the radio base station, for identifying an allocated radio resource to be allocated to the uplink response signal from the plurality of radio resources
- a specific information generating unit configured to generate specific information; and a specific information notifying unit configured to notify the generated specific information, wherein the specific information generating unit includes the plurality of specific information generating units.
- radio resources are classified into a plurality of groups, a criterion for specifying a group including one or more unused allocated radio resources as the specific information And constant information, and subject matter that is configured to generate the one or more relative specific information relative positions on the one or more allocated radio resources of the radio resource space is shown in in the group.
- FIG. 1 is a functional block diagram of a mobile station according to the first embodiment of the present invention.
- FIG. 2 is a diagram for explaining scheduling performed in the mobile communication system according to the first embodiment of the present invention.
- FIG. 3 is a diagram explaining an uplink radio resource (PUCCH) determination method performed in the mobile communication system according to the first embodiment of the present invention.
- FIG. 4 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
- FIG. 5 is a diagram for explaining a method for determining the content of an uplink radio resource adjustment signal performed in the mobile communication system according to the first embodiment of the present invention.
- FIG. 6 is a flowchart showing the operation of the mobile station according to the first embodiment of the present invention.
- FIG. 7 is a flowchart showing an operation of the radio base station according to the first embodiment of the present invention.
- FIG. 8 is a diagram for setting scheduling in a general LTE mobile communication system.
- FIG. 9 is a diagram for setting scheduling in a general LTE mobile communication system.
- the mobile base station eNB uses the PDSCH (downlink radio resource) that is fixedly assigned in the first period starting from the first assignment start time point. It is configured to receive downlink data transmitted from, and to transmit acknowledgment information (ACK / NACK) for the downlink data using PUCCH (uplink radio resource).
- PDSCH downlink radio resource
- PUCCH uplink radio resource
- the time difference between the reception timing of the downlink data and the transmission timing of the delivery confirmation information is fixed.
- the mobile station UE includes a Persistent information receiving unit 11, a Persistent assignment signal receiving unit 12, a downlink data receiving unit 13, and an ACK / NACK transmitting unit 14.
- the Persistent information receiving unit 11 is configured to receive Persistent information (fixed communication information) including the above-described first period and information related to the uplink radio resource (PUCCH) from the radio base station eNB.
- Persistent information fixed communication information
- PUCCH uplink radio resource
- the Persistent information receiving unit 11 is configured to acquire the Persistent information described above based on the RRC message transmitted by the radio base station eNB.
- the information related to the uplink radio resource is, for example, the resource block number of a resource block (subcarrier set) in which the PUCCH is transmitted or a plurality of acknowledgment information within one resource block. It is an identification number.
- a cyclic shift amount in multiplexing by cyclic shift of a CAZAC sequence and an orthogonal cover number in block spreading may be designated.
- the information on the uplink radio resource (PUCCH) described above may take any form as long as the information can identify the radio resource.
- the information on the uplink radio resource may be the code resource identification number in the above-described code multiplexing, the frequency resource identification number in the frequency multiplexing, or the time resource in the time multiplexing. It may be an identification number, or may be an identification number of a resource in multiplexing by the above-described hybrid method of code multiplexing, frequency multiplexing, and time multiplexing.
- the Persistent information does not include information on the first allocation start point.
- the radio base station eNB can flexibly determine the time resource for assigning the PDSCH (downlink radio resource) described above, thereby improving the utilization efficiency of the radio resource when applying “Persistent scheduling”. This is for the purpose of illustration.
- the transmission timing of the uplink radio resource is uniquely determined based on the reception timing of the downlink radio resource (PDSCH) described above and a fixedly defined time offset, and therefore is included as persistent information. There is no need to be
- 4 ms are an example and may be a value other than 4 ms.
- 4 ms may be expressed as 4 subframes.
- the Persistent assignment signal receiving unit 12 is configured to receive a fixed assignment signal from the radio base station eNB.
- the persistent assignment signal receiving unit 12 receives, as a fixed assignment signal, the PDCCH instructing the fixed assignment of the PDSCH (downlink radio resource) for “persistent scheduling” from the radio base station eNB. It is configured.
- the persistent assignment signal receiving unit 12 is a PDCCH that instructs fixed assignment of PDSCH (downlink radio resource) for “persistent scheduling” based on the RNTI set in the PDCCH or the like. It may be configured to determine whether the PDCCH is dynamically allocated to the downlink scheduling PDSCH (downlink radio resource).
- the persistent assignment signal receiving unit 12 is a PDCCH that instructs fixed assignment of PDSCH (downlink radio resource) for “persistent scheduling” based on a specific 1 bit in the PDCCH, or a normal one. You may be comprised so that it may determine whether it is PDCCH which allocates PDSCH (downlink radio
- the persistent assignment signal receiving unit 12 determines whether a part of the information element in the PDCCH is a PDCCH instructing fixed assignment of PDSCH (downlink radio resource) for “persistent scheduling”, or a normal downlink
- PDSCH downlink radio resource
- a PDSCH for “persistent scheduling” Even if it is configured to determine whether it is a PDCCH that instructs fixed allocation of (downlink radio resources) or a PDCCH that dynamically allocates PDSCH (downlink radio resources) for normal downlink scheduling Good.
- the resource block number of PUCCH uplink radio resource
- an uplink radio resource adjustment signal for adjusting an identification number when a plurality of pieces of acknowledgment information are multiplexed. Details of the uplink radio resource adjustment signal will be described later.
- the uplink radio resource adjustment signal is given to the ACK / NACK transmission unit 14.
- the downlink data receiving unit 13 is configured to receive downlink data transmitted via a PDSCH (downlink radio resource) allocated by the PDCCH.
- PDSCH downlink radio resource
- the downlink data reception unit 13 assigns the subframe that has received the PDCCH to the first assignment described above. It is determined as a start time, and is configured to receive downlink data via the PDSCH (downlink radio resource) for “Persistent scheduling” fixedly in the above-described first period starting from the first allocation start time Yes.
- the downlink data receiving unit 13 receives the subframe # 3 specified by the PDCCH. It is configured to receive downlink data via a PDSCH (downlink radio resource) mapped to an internal resource block (a set of subcarriers).
- PDSCH downlink radio resource
- the downlink data reception unit 13 starts from the subframe # 3 via the PDSCH (downlink radio resource) mapped to the resource block (set of subcarriers) specified by the PDCCH in a cycle of 20 ms. It is configured to receive downlink data.
- PDSCH downlink radio resource
- the downlink data receiving unit 13 transmits the PDSCH (downlink radio resource) mapped to the resource block (set of subcarriers) designated by the PDCCH in the subframes # 3, # 23, # 43,. And is configured to receive downlink data.
- PDSCH downlink radio resource
- the ACK / NACK transmission unit 14 receives information on the uplink radio resource (PUCCH) notified by the Persistent information from the Persistent information reception unit 11.
- PUCCH uplink radio resource
- the ACK / NACK transmission unit 14 identifies from the persistent assignment signal reception unit 12 the above-described PUCCH (uplink radio resource) resource block number and a plurality of acknowledgment information within one resource block. An uplink radio resource adjustment signal for adjusting the number is received.
- PUCCH uplink radio resource
- the ACK / NACK transmitter 14 determines an uplink radio resource (PUCCH) based on the information on the uplink radio resource (PUCCH) notified by the Persistent information and the uplink radio resource adjustment signal, and the uplink radio Transmission confirmation information (ACK / NACK) for the received downlink data is transmitted via the resource (PUCCH).
- the delivery confirmation information (ACK / NACK) is determined based on the downlink data decoding result in the downlink data receiving unit 13.
- radio resources are defined as uplink radio resources (PUCCH), and # 0, # 1, # 2,..., # 7 are defined as identification numbers.
- PUCCH uplink radio resources
- # 0, # 1, # 2,..., # 7 are defined as identification numbers.
- identification number may be an identification number when a plurality of pieces of delivery confirmation information are multiplexed in one resource block described above.
- the radio resource with the identification number # 2 is designated by the information on the uplink radio resource (PUCCH) notified by the Persistent information, and “+3” is designated by the above-described uplink radio resource adjustment signal.
- the ACK / NACK transmission unit 14 transmits the acknowledgment information (ACK / NACK) for the received downlink data to the radio resource with the identification number # 5 by adding “+3” to the identification number # 2.
- Wireless resource for use that is, as an uplink radio resource (PUCCH).
- the radio resource specified by the information on the uplink radio resource (PUCCH) notified by the Persistent information is adjusted by the above-described uplink radio resource adjustment signal.
- the identification number in the case where a plurality of pieces of acknowledgment information are multiplexed in one resource block is adjusted by the above uplink radio resource adjustment signal.
- the resource block number of PUCCH may be adjusted by the signal.
- both the identification number and the PUCCH resource block number when a plurality of pieces of acknowledgment information are multiplexed in one resource block may be adjusted by the above uplink radio resource adjustment signal.
- an identification number for identifying a resource other than the above may be defined, and the identification number may be adjusted by the above-described uplink radio resource adjustment signal.
- the above identification number is adjusted by “+3” by the uplink radio resource adjustment signal described above.
- “+3” is an example, and values other than “+3”, such as “+2” and “+4”. It may be. Alternatively, it may be a negative value such as “ ⁇ 3” or “ ⁇ 2”. Alternatively, it may be “0”.
- the uplink radio resource adjustment signal described above may be a signal having a meaning other than the above as long as the identification number can be adjusted.
- the same uplink radio resource (PUCCH) determination method can be applied even when radio resources other than eight are defined. Is possible.
- the identification number specified by the information on the uplink radio resource (PUCCH) notified by the Persistent information is adjusted by the uplink radio resource adjustment signal, but instead of the previous “Talk”
- the identification number of the uplink radio resource (PUCCH) used in “Spurt” is adjusted by the uplink radio resource adjustment signal, and the radio resource of the identification number after the adjustment is used as the uplink radio resource (PUCCH). May be.
- the identification number specified by the information about the uplink radio resource (PUCCH) notified by the Persistent information is adjusted by the uplink radio resource adjustment signal.
- the identification number specified by the information on the uplink radio resource (PUCCH) notified by the persistent information is adjusted by the uplink radio resource adjustment signal, but instead by the persistent information. May not be notified of information on the uplink radio resource (PUCCH), but may be notified of information on the uplink radio resource (PUCCH) through the PDCCH.
- the information on the uplink radio resource (PUCCH) notified by PDCCH may be, for example, information of “identification number # 2” and information of “+3”, or more directly.
- the information “identification number # 5” may be used.
- the uplink radio resource adjustment signal is defined as a part of an information element notified by a Persistent assignment signal (fixed assignment signal).
- the bits of the power control command used for transmission power control in the dynamic allocation signal are It may be used as a resource adjustment signal.
- the signal format of the persistent allocation signal is the same as the signal format of the dynamic allocation signal in the dynamic scheduling
- a bit specifying “Redundancy Version” in the dynamic allocation signal is used as the uplink radio resource adjustment signal. Also good.
- the bit of the power control command used for transmission power control can be used as the uplink radio resource adjustment signal.
- the redundancy version is a predetermined redundancy version.
- the bit specifying “MCS (Modulation and Coding Scheme)” in the dynamic allocation signal is the uplink radio resource adjustment. It may be used as a signal.
- the timing for transmitting acknowledgment information (ACK / NACK) for downlink data received via the uplink radio resource (PUCCH) is fixedly defined as the reception timing of the downlink radio resource (PDSCH) as described above.
- the timing is uniquely determined based on the determined time offset.
- the acknowledgment information (ACK / NACK) for PDSCH (downlink data) is transmitted by PUCCH.
- uplink data is transmitted.
- the acknowledgment information for the downlink data may be multiplexed with PUSCH and transmitted.
- the acknowledgment information for the downlink data is included in the PUSCH. May be transmitted as a part of the information.
- the radio base station eNB is configured to notify the mobile station UE of information related to the first period and the uplink radio resource (PUCCH).
- PUCCH uplink radio resource
- the radio base station eNB includes a Persistent information transmission unit 21, a Persistent assignment signal transmission unit 22, a downlink data transmission unit 23, and an ACK / NACK transmission unit 24.
- the Persistent information transmission unit 21 is configured to transmit Persistent information (fixed communication information) including the above-described first period and information on the uplink radio resource (PUCCH) to the mobile station UE.
- Persistent information fixed communication information
- PUCCH uplink radio resource
- the Persistent information transmission unit 21 is configured to notify the above-described Persistent information to the mobile station UE using an RRC message.
- the persistent assignment signal transmission unit 22 is configured to transmit a fixed assignment signal to the mobile station UE.
- the persistent allocation signal transmission unit 22 transmits a PDCCH instructing fixed allocation of PDSCH (downlink radio resource) for “persistent scheduling” to the mobile station UE as a fixed allocation signal. It is configured as follows.
- the fixed allocation signal includes a PUCCH (uplink radio resource) resource block number and one resource block in addition to information for instructing fixed allocation of PDSCH (downlink radio resource) for “Persistent scheduling”.
- An uplink radio resource adjustment signal for adjusting an identification number when a plurality of pieces of acknowledgment information are multiplexed is included.
- the uplink radio resource adjustment signal is given to the ACK / NACK receiver 24.
- the persistent allocation signal transmission unit 22 sets the content of the uplink radio resource adjustment signal described above so that the radio resource of the delivery confirmation information for the downlink data does not collide with the radio resource of the delivery confirmation information transmitted by another mobile station. It may be configured to determine.
- FIG. Indicates An example of a method for determining the content of an uplink radio resource adjustment signal so that radio resources of acknowledgment information for the downlink data do not collide with radio resources of acknowledgment information transmitted by other mobile stations.
- radio resources are defined as uplink radio resources (PUCCH), and # 0, # 1, # 2,..., # 7 are defined as identification numbers.
- the radio resources with identification numbers # 2, # 3, and # 4 have already been transmitted by other mobile stations UE # A, UE # B, and UE # C, respectively. in use.
- the uplink radio resource adjustment signal does not adjust the identification number of the uplink radio resource (PUCCH) of the mobile station UE
- the uplink radio resource (PUCCH) transmitted by another mobile station UE # A the uplink radio resource (PUCCH) transmitted by the mobile station UE collides, and the transmission characteristics of the other mobile station UE # A and the uplink radio resource (PUCCH) of the mobile station UE are significantly degraded.
- the persistent assignment signal transmission unit 22 determines to adjust the identification number of the uplink radio resource (PUCCH) of the mobile station UE by “+3” by the uplink radio resource adjustment signal in order to prevent the above-described collision.
- PUCCH uplink radio resource
- the downlink data transmission unit 23 is configured to transmit downlink data transmitted via the PDSCH (downlink radio resource) assigned by the PDCCH.
- the downlink data transmission unit 23 transmits the subframe in which the PDCCH is transmitted to the first allocation as described above. It is determined as a start time, and is configured to transmit downlink data via a PDSCH (downlink radio resource) for “persistent scheduling” fixedly in the above-described first period starting from the first allocation start time Yes.
- PDSCH downlink radio resource
- the ACK / NACK receiving unit 24 receives information on the uplink radio resource (PUCCH) notified by the Persistent information from the Persistent information transmitting unit 21.
- PUCCH uplink radio resource
- the ACK / NACK receiving unit 24 receives the above-described PUCCH (uplink radio resource) resource block number or identification number when a plurality of pieces of acknowledgment information are multiplexed in one resource block from the persistent allocation signal transmission unit 22.
- An uplink radio resource adjustment signal is received for adjusting.
- the ACK / NACK receiving unit 24 determines an uplink radio resource (PUCCH) based on the information about the uplink radio resource (PUCCH) notified by the Persistent information and the uplink radio resource adjustment signal, and determines the uplink radio resource ( It is configured to receive acknowledgment information (ACK / NACK) for transmitted downlink data via PUCCH.
- PUCCH uplink radio resource
- the method for determining the uplink radio resource (PUCCH) based on the information on the uplink radio resource (PUCCH) notified by the Persistent information and the uplink radio resource adjustment signal is the same as the description in the mobile station UE. Omitted.
- step S101 the mobile station UE receives Persistent information including the above-described first period and information on the uplink radio resource (PUCCH) from the radio base station eNB by an RRC message or the like. To do.
- PUCCH uplink radio resource
- the mobile station UE receives the Persistent assignment signal (fixed assignment signal) transmitted via the PDCCH by the radio base station eNB.
- the persistent assignment signal includes an uplink radio resource adjustment signal.
- step S102 the mobile station UE determines the timing at which the persistent allocation signal is received as the first allocation start time.
- step S103 the mobile station UE determines an uplink radio resource (PUCCH) based on the information on the uplink radio resource (PUCCH) and the uplink radio resource adjustment signal.
- PUCCH uplink radio resource
- a method for determining an uplink radio resource (PUCCH) based on the information on the uplink radio resource (PUCCH) and the uplink radio resource adjustment signal has already been described in the ACK / NACK transmission unit 14 in the mobile station UE described above. Further, it is the same as the method for determining the uplink radio resource (PUCCH).
- step S104 the mobile station UE receives the PDSCH (for persistent scheduling) specified by the persistent allocation signal at the reception timing of “persistent scheduling” calculated from the first allocation start time and the first period.
- Downlink data is received via (downlink radio resource).
- step S105 the mobile station UE transmits delivery confirmation information (ACK / NACK) for the downlink data received in step S104 via the uplink radio resource (PUCCH) determined in step S103.
- delivery confirmation information ACK / NACK
- PUCCH uplink radio resource
- the mobile station UE receives downlink data via the PDSCH (downlink radio resource) fixedly assigned in the first period (step S104), and receives the downlink data via the PUCCH (uplink radio resource). Delivery confirmation information (ACK / NACK) is transmitted (step S105).
- PDSCH downlink radio resource
- PUCCH uplink radio resource
- the radio base station eNB uses the RRC message or the like to the mobile station UE to detect the persistent information including the above-described first period and information on the uplink radio resource (PUCCH). Send.
- step S202 the radio base station eNB determines to transmit a persistent allocation signal (fixed allocation signal) transmitted via the PDCCH to the mobile station UE.
- a persistent allocation signal fixed allocation signal
- step S203 the radio base station eNB determines whether the uplink radio resource (PUCCH) specified by the information on the uplink radio resource (PUCCH) collides with the uplink radio resource (PUCCH) of another mobile station UE. judge.
- step S203 When it is determined that the uplink radio resource (PUCCH) specified by the information on the uplink radio resource (PUCCH) collides with the uplink radio resource (PUCCH) of another mobile station UE (step S203: YES), step S204 In other cases (step S203: NO), the process proceeds to step S205.
- PUCCH uplink radio resource
- PUCCH uplink radio resource
- step S204 the radio base station eNB determines to adjust the uplink radio resource (PUCCH) specified by the information on the uplink radio resource (PUCCH).
- PUCCH uplink radio resource
- the radio base station eNB sets, for example, a value “+3” as the uplink radio resource adjustment signal.
- the uplink radio resource adjustment signal is included in the Persistent assignment signal determined to be transmitted in step S202.
- step S204 the radio base station eNB determines not to adjust the uplink radio resource (PUCCH) specified by the information on the uplink radio resource (PUCCH).
- PUCCH uplink radio resource
- the radio base station eNB sets, for example, a value “0” as the uplink radio resource adjustment signal.
- the uplink radio resource adjustment signal is included in the Persistent assignment signal determined to be transmitted in step S202.
- the mobile communication system according to the first embodiment of the present invention when the timing for assigning the downlink radio resource (PDSCH) is changed, and the changed uplink radio resource (PUCCH) is another mobile station UE.
- the downlink radio resource (PDSCH) by “Persistent scheduling” is set. It is possible to flexibly set the time of allocation, and it is possible to improve the wireless usage efficiency.
- the first feature of the present embodiment is the reception state of a fixedly assigned downlink signal from a plurality of radio resources continuously defined on the radio resource space formed by the frequency axis and the code axis.
- a radio resource selection method for semi-fixingly selecting a radio resource to be allocated to a received uplink response signal wherein a specification for identifying an allocated radio resource to be allocated to the uplink response signal from the plurality of radio resources Including a step A for generating information, a step B for notifying the generated specific information, and a step C for selecting an allocated radio resource based on the notified specific information.
- the plurality of radio resources In order to identify a group including one or more unused allocated radio resources as the identification information. And the reference identification information, and subject matter to generate the one or more allocated radio resources of the radio resource space on one or more relative specific information relative position is indicated in such a group.
- fixedly assigned downlink signal corresponds to “downlink data transmitted using downlink radio resource (PDSCH) assigned by persistent scheduling”.
- the “uplink response signal indicating the reception state of the downlink signal” corresponds to the “delivery confirmation information for downlink data” described above.
- the “reference specifying information” corresponds to the “information related to the uplink radio resource (PUCCH)”
- the “relative specification information” corresponds to the “uplink radio resource adjustment signal” described above.
- the “assigned radio resource” corresponds to each of the radio resources shown in FIG. 3, for example.
- step A relative identification information may be generated for unused allocated radio resources.
- step A frequency information (for example, resource block number) of any assigned radio resource in the group may be used as reference specifying information.
- the second feature of the present embodiment shows the reception state of a fixedly assigned downlink signal from a plurality of radio resources continuously defined on the radio resource space formed by the frequency axis and the code axis.
- a radio base station for semi-fixingly selecting a radio resource to be allocated to the uplink response signal generated, generating information (reference specifying information) about the uplink radio resource (PUCCH), and generating the generated uplink radio resource (PUCCH) )
- Persistent information transmitter 21 configured to notify information related to), and generates a radio resource adjustment signal (relative specific information), and Persistent configured to notify the generated radio resource adjustment signal.
- the gist of the present invention is to include an allocation signal transmission unit 22.
- the Persistent allocation signal transmission unit 22 may be configured to generate such an uplink radio resource adjustment signal for unused allocated radio resources.
- the Persistent information transmission unit 21 uses the uplink radio resource (PUCCH) as the frequency information (for example, the resource block number) of any radio resource in the group including the assigned radio resource. ).
- PUCCH uplink radio resource
- the third feature of the present embodiment shows the reception state of fixedly allocated downlink signals from a plurality of radio resources continuously defined on the radio resource space formed by the frequency axis and the code axis.
- the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
- RAM Random Access Memory
- flash memory ROM (Read Only Memory)
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
- it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.
- a mobile communication method As described above, according to the present invention, it is possible to provide a mobile communication method, a mobile station, and a radio base station that can flexibly set the timing of a downlink radio resource (PDSCH) allocated by “Persistent scheduling”. Can do.
- PDSCH downlink radio resource
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Abstract
Description
図1及び図2を参照して、本発明の第1の実施形態に係る移動通信システムの構成について説明する。なお、本実施形態では、LTE方式の移動通信システムを例に挙げて説明するが、本発明は、他方式の移動通信システムにも適用可能である。
(上り無線リソース(PUCCH)の送信タイミング)
=(下り無線リソース(PDSCH)の受信タイミング)+4ms
と定義されてもよい。
図6を参照して、本発明の第1の実施形態に係る移動通信システムの動作について説明する。
本発明の第1の実施形態に係る移動通信システムによれば、下り無線リソース(PDSCH)を割り当てるタイミングを変更した場合で、かつ、変更後の上り無線リソース(PUCCH)が、他の移動局UEの上り無線リソース(PUCCH)と衝突する場合に、前記上り無線リソース(PUCCH)を調節することにより、上記衝突を回避することが可能となるため、「Persistentスケジューリング」による下り無線リソース(PDSCH)を割当てる時点を柔軟に設定することが可能となり、無線利用効率の向上をはかることができる。
なお、上述の移動局UEや無線基地局eNBの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。
Claims (7)
- 周波数軸とコード軸とにより形成された無線リソース空間上に連続して規定された複数の無線リソースから、固定的に割り当てられた下り信号の受信状態が示された上り応答信号に割り当てられるべき無線リソースを準固定的に選択する無線リソース選択方法であって、
前記複数の無線リソースから、前記上り応答信号に割り当てられるべき割当無線リソースを特定するための特定情報を生成する工程Aと、
生成された特定情報を通知する工程Bと、
通知された特定情報に基づいて割当無線リソースを選択する工程Cとを含み、
前記工程Aにおいて、前記複数の無線リソースが複数のグループに分類されている場合、前記特定情報として、1以上の未使用の割当無線リソースが含まれたグループを特定するための基準特定情報と、該グループ内における1以上の割当無線リソースの無線リソース空間上の相対位置が示された1以上の相対特定情報とを生成することを特徴とする無線リソース選択方法。 - 前記工程Aにおいて、未使用の割当無線リソースについて、前記相対特定情報を生成することを特徴とする請求項1に記載の無線リソース選択方法。
- 前記工程Aにおいて、前記グループ内のいずれかの割当無線リソースの周波数情報を、前記基準特定情報とすることを特徴とする請求項1に記載の無線リソース選択方法。
- 周波数軸とコード軸とにより形成された無線リソース空間上に連続して規定された複数の無線リソースから、固定的に割り当てられた下り信号の受信状態が示された上り応答信号に割り当てられるべき無線リソースを準固定的に選択する無線基地局であって、
前記複数の無線リソースから、前記上り応答信号に割り当てられるべき割当無線リソースを特定するための特定情報を生成するように構成されている特定情報生成部と、
生成された特定情報を通知するように構成されている特定情報通知部とを具備し、
前記特定情報生成部は、前記複数の無線リソースが複数のグループに分類されている場合、前記特定情報として、1以上の未使用の割当無線リソースが含まれたグループを特定するための基準特定情報と、該グループ内における1以上の割当無線リソースの無線リソース空間上の相対位置が示された1以上の相対特定情報とを生成するように構成されていることを特徴とする無線基地局。 - 前記特定情報生成部は、未使用の割当無線リソースについて、前記相対特定情報を生成するように構成されていることを特徴とする請求項4に記載の無線基地局。
- 前記特定情報生成部は、前記グループ内のいずれかの無線リソースの周波数情報を、前記基準特定情報とするように構成されていることを特徴とする請求項4に記載の無線基地局。
- 周波数軸とコード軸とにより形成された無線リソース空間上に連続して規定された複数の無線リソースから、固定的に割り当てられた下り信号の受信状態が示された上り応答信号に割り当てられるべき無線リソースが準固定的に選択される移動通信システムで用いられる移動局であって、
無線基地局から、前記上り応答信号に割り当てられるべき割当無線リソースを特定するための特定情報を受信するように構成されている特定情報受信部と、
前記特定情報受信部によって受信された特定情報に基づいて割当無線リソースを選択するように構成されている無線リソース選択部とを具備し、
前記複数の無線リソースが複数のグループに分類されている場合、前記特定情報は、1以上の未使用の割当無線リソースが含まれたグループを特定するための基準特定情報と、該グループ内における1以上の割当無線リソースの無線リソース空間上の相対位置が示された1以上の相対特定情報とを含むように構成されていることを特徴とする移動局。
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EP20090726065 EP2262340B1 (en) | 2008-03-28 | 2009-03-27 | Radio resource selecting method, mobile station and radio base station |
BRPI0909029A BRPI0909029A2 (pt) | 2008-03-28 | 2009-03-27 | método de seleção de recurso de rádio, estação móvel e estação base de rádio |
RU2010133624/07A RU2477586C2 (ru) | 2008-03-28 | 2009-03-27 | Способ выбора радиоресурса, мобильная станция и базовая станция радиосвязи |
KR20107017856A KR101151205B1 (ko) | 2008-03-28 | 2009-03-27 | 무선리소스 선택방법, 이동국 및 무선기지국 |
PL09726065T PL2262340T3 (pl) | 2008-03-28 | 2009-03-27 | Sposób wyboru zasobu radiowego, stacja mobilna i radiowa stacja bazowa |
ES09726065T ES2428329T3 (es) | 2008-03-28 | 2009-03-27 | Procedimiento de seleccción de recursos radioeléctricos, estación móvil y estación base de radio |
CN200980105475.4A CN101953217B (zh) | 2008-03-28 | 2009-03-27 | 无线资源选择方法、移动台、及无线基站 |
AU2009229787A AU2009229787B2 (en) | 2008-03-28 | 2009-03-27 | Radio resource selecting method, mobile station and radio base station |
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US12/922,711 US8160017B2 (en) | 2008-03-28 | 2009-03-27 | Radio resource selecting method, mobile station and radio base station |
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JP2013509129A (ja) * | 2009-10-26 | 2013-03-07 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおける受信確認送信方法及び装置 |
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US9148263B2 (en) | 2009-10-26 | 2015-09-29 | Lg Electronics Inc. | Method and apparatus for transmitting reception acknowledgement information in wireless communication system |
US9847854B2 (en) | 2009-10-26 | 2017-12-19 | Lg Electronics Inc. | Method and apparatus for transmitting reception acknowledgement information in wireless communication system |
US10721030B2 (en) | 2009-10-26 | 2020-07-21 | Lg Electronics Inc. | Method and apparatus for transmitting reception acknowledgement information in wireless communication system |
US10327230B2 (en) | 2010-02-03 | 2019-06-18 | Lg Electronics Inc. | Method and apparatus for transmitting control information in wireless communication system |
WO2011099618A1 (ja) * | 2010-02-15 | 2011-08-18 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信方法及び移動局 |
JP2011166710A (ja) * | 2010-02-15 | 2011-08-25 | Ntt Docomo Inc | 移動通信方法及び移動局 |
CN102754507A (zh) * | 2010-02-15 | 2012-10-24 | 株式会社Ntt都科摩 | 移动通信方法以及移动台 |
CN102316592A (zh) * | 2010-07-01 | 2012-01-11 | 电信科学技术研究院 | 一种持续调度的方法、装置 |
Also Published As
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CN101953217A (zh) | 2011-01-19 |
US8160017B2 (en) | 2012-04-17 |
MX2010009217A (es) | 2010-09-28 |
CN101953217B (zh) | 2014-05-07 |
RU2010133624A (ru) | 2012-05-10 |
JP4410837B2 (ja) | 2010-02-03 |
PT2621237E (pt) | 2014-12-09 |
EP2621237B1 (en) | 2014-11-26 |
AU2009229787B2 (en) | 2012-09-13 |
CN103354662A (zh) | 2013-10-16 |
RU2521470C1 (ru) | 2014-06-27 |
BRPI0909029A2 (pt) | 2015-09-22 |
EP2262340A1 (en) | 2010-12-15 |
PL2262340T3 (pl) | 2013-11-29 |
KR101151205B1 (ko) | 2012-05-29 |
RU2477586C2 (ru) | 2013-03-10 |
US20110164579A1 (en) | 2011-07-07 |
CA2714498C (en) | 2015-03-03 |
ZA201005789B (en) | 2011-11-30 |
EP2262340B1 (en) | 2013-07-03 |
JP2009260956A (ja) | 2009-11-05 |
KR20100108427A (ko) | 2010-10-06 |
CA2714498A1 (en) | 2009-10-01 |
CN103354662B (zh) | 2017-03-01 |
EP2621237A1 (en) | 2013-07-31 |
EP2262340A4 (en) | 2011-04-06 |
AU2009229787A1 (en) | 2009-10-01 |
ES2428329T3 (es) | 2013-11-07 |
PT2262340E (pt) | 2013-07-22 |
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