WO2010146880A1 - 端末装置および再送制御方法 - Google Patents
端末装置および再送制御方法 Download PDFInfo
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- WO2010146880A1 WO2010146880A1 PCT/JP2010/004100 JP2010004100W WO2010146880A1 WO 2010146880 A1 WO2010146880 A1 WO 2010146880A1 JP 2010004100 W JP2010004100 W JP 2010004100W WO 2010146880 A1 WO2010146880 A1 WO 2010146880A1
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- unit band
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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
- H04L1/1861—Physical mapping 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
Definitions
- the present invention relates to a terminal device and a retransmission control method.
- OFDMA Orthogonal Frequency Division Multiple Access
- SCH Synchronization Channel
- BCH Broadcast Channel
- the terminal first secures synchronization with the base station by capturing the SCH. Thereafter, the terminal acquires parameters (eg, frequency bandwidth) unique to the base station by reading the BCH information (see Non-Patent Documents 1, 2, and 3).
- the terminal establishes communication with the base station by making a connection request to the base station after the acquisition of the parameters unique to the base station is completed.
- the base station transmits control information via a PDCCH (Physical ⁇ Downlink Control CHannel) as necessary to a terminal with which communication has been established.
- PDCCH Physical ⁇ Downlink Control CHannel
- the terminal performs “blind determination” for each of the plurality of control information included in the received PDCCH signal. That is, the control information includes a CRC (Cyclic Redundancy Check) part, and this CRC part is masked by the terminal ID of the transmission target terminal in the base station. Therefore, the terminal cannot determine whether or not the received control information is control information destined for the own device until the CRC part of the received control information is demasked with the terminal ID of the own device. In this blind determination, if the CRC calculation is OK as a result of demasking, it is determined that the control information is addressed to the own device.
- CRC Cyclic Redundancy Check
- ARQ Automatic Repeat Request
- the terminal feeds back a response signal indicating an error detection result of downlink data to the base station.
- An uplink control channel such as PUCCH (Physical Uplink Control Channel) is used for feedback of this response signal (that is, ACK / NACK signal).
- PUCCH Physical Uplink Control Channel
- the control information transmitted from the base station includes resource allocation information including resource information allocated to the terminal by the base station.
- the PDCCH is used for transmitting the control information.
- This PDCCH is composed of one or a plurality of L1 / L2 CCHs (L1 / L2 Control Channel).
- Each L1 / L2CCH is composed of one or a plurality of CCEs (Control Channel Element). That is, CCE is a basic unit for mapping control information to PDCCH.
- one L1 / L2CCH is composed of a plurality of CCEs, a plurality of continuous CCEs are allocated to the L1 / L2CCH.
- the base station allocates L1 / L2 CCH to the resource allocation target terminal according to the number of CCEs required for reporting control information to the resource allocation target terminal. Then, the base station maps the physical resource corresponding to the CCE of this L1 / L2CCH and transmits control information.
- each CCE is associated with the PUCCH configuration resource on a one-to-one basis. Therefore, the terminal that has received the L1 / L2CCH specifies a PUCCH configuration resource corresponding to the CCE that configures the L1 / L2CCH, and transmits a response signal to the base station using this resource.
- the terminal may select one of a plurality of PUCCH configuration resources corresponding to the plurality of CCEs (for example, PUCCH corresponding to the CCE having the smallest Index). The response signal is transmitted to the base station using the configuration resource.
- downlink communication resources are efficiently used.
- a plurality of response signals transmitted from a plurality of terminals include a ZAC (Zero Auto-correlation) sequence having a Zero Auto-correlation characteristic on the time axis, a Walsh sequence, and a DFT ( Discrete Fourier Transform) sequence and code-multiplexed in PUCCH.
- ZAC Zero Auto-correlation
- W 1 , W 2 , W 3 represents a Walsh sequence with a sequence length of 4
- (F 0 , F 1 , F 2 ) represents a DFT sequence with a sequence length of 3.
- an ACK or NACK response signal is first-order spread to a frequency component corresponding to one SC-FDMA symbol by a ZAC sequence (sequence length 12) on the frequency axis.
- the response signal after the first spreading and the ZAC sequence as the reference signal are associated with the Walsh sequence (sequence length 4: W 0 to W 3 ) and the DFT sequence (sequence length 3: F 0 to F 3 ), respectively.
- the second-order spread signal is converted into a signal having a sequence length of 12 on the time axis by IFFT (Inverse Fast Fourier Transform).
- IFFT Inverse Fast Fourier Transform
- the orthogonal code sequence is a set of a Walsh sequence and a DFT sequence.
- the orthogonal code sequence may be referred to as a block-wise spreading code sequence. Therefore, the base station can separate these response signals that have been code-multiplexed by using conventional despreading and correlation processing (see Non-Patent Document 4).
- each terminal blindly determines the downlink allocation control signal addressed to itself in each subframe, reception of the downlink allocation control signal is not always successful on the terminal side.
- a terminal fails to receive a downlink assignment control signal addressed to itself in a certain downlink unit band, the terminal cannot even know whether downlink data addressed to itself exists in the downlink unit band. Therefore, if reception of a downlink assignment control signal in a certain downlink unit band fails, the terminal does not generate a response signal for downlink data in the downlink unit band.
- This error case is defined as DTX (DTX (Discontinuous transmission) of ACK / NACK signals) of the response signal in the sense that the response signal is not transmitted on the terminal side.
- LTE-A system 3GPP LTE-advanced system
- LTE system 3GPP LTE system
- the LTE- The band for the A system is divided into “unit bands” of 20 MHz or less, which is the support bandwidth of the LTE system. That is, the “unit band” is a band having a maximum width of 20 MHz, and is defined as a basic unit of the communication band. Furthermore, the “unit band” (hereinafter referred to as “downlink unit band”) in the downlink is a band delimited by downlink frequency band information in the BCH broadcast from the base station, or the downlink control channel (PDCCH) is a frequency.
- the “unit band” hereinafter referred to as “downlink unit band” in the downlink is a band delimited by downlink frequency band information in the BCH broadcast from the base station, or the downlink control channel (PDCCH) is a frequency.
- the “unit band” in the uplink is a band delimited by uplink frequency band information in the BCH broadcast from the base station, or a PUSCH (Physical-Uplink) near the center. It may be defined as a basic unit of a communication band of 20 MHz or less including a Shared (CHAnel) region and including PUCCH for LTE at both ends.
- the “unit band” may be expressed as “Component Carrier (s)” in English in 3GPP LTE-Advanced.
- the LTE-A system supports communication using a band obtained by bundling several unit bands, so-called Carrier Aggregation.
- Carrier Aggregation In general, an uplink throughput request and a downlink throughput request are different from each other. Therefore, in the LTE-A system, an arbitrary LTE-A system compatible terminal (hereinafter referred to as “LTE-A terminal”) is set.
- LTE-A terminal an arbitrary LTE-A system compatible terminal
- Carrier-aggregation the so-called Asymmetric carrier-aggregation, in which the number of unit bands to be transmitted differs between upstream and downstream, is also being studied. Furthermore, the case where the number of unit bands is asymmetric between upstream and downstream and the frequency bandwidth of each unit band is different is also supported.
- FIG. 2 is a diagram for explaining an asymmetric carrier aggregation applied to individual terminals and its control sequence.
- FIG. 2 shows an example in which the uplink and downlink bandwidths and the number of unit bands of the base station are symmetric.
- terminal 1 is configured to perform carrier aggregation using two downlink unit bands and one uplink unit band on the left side. In spite of the setting that uses the same two downlink unit bands as those of the terminal 1, the setting that uses the right uplink unit band is performed in the uplink communication.
- Terminal 1 When attention is paid to the terminal 1, signals are transmitted and received between the LTE-A base station and the LTE-A terminal constituting the LTE-A system according to the sequence diagram shown in FIG. 2A.
- Terminal 1 synchronizes with the left downlink unit band at the start of communication with the base station, and sends information on the uplink unit band paired with the left downlink unit band to SIB2 Read from a notification signal called (System Information Block Type 2).
- SIB2 System Information Block Type 2
- the terminal 1 starts communication with the base station, for example, by transmitting a connection request to the base station.
- the base station instructs the terminal to add a downlink unit band.
- the number of uplink unit bands does not increase, and asymmetric carrier aggregation is started in terminal 1, which is an individual terminal.
- a terminal may receive a plurality of downlink data in a plurality of downlink unit bands at a time.
- Channel Selection also referred to as Multiplexing
- Channel-Selection not only symbols used for response signals but also resources for mapping response signals are changed according to the pattern of error detection results for a plurality of downlink data. That is, as shown in FIG. 3, the Channel selection is based on whether the response signal for the plurality of downlink data received in the plurality of downlink unit bands is ACK or NACK, respectively (ie, Constellation point). This is a technique for changing not only the resources used for transmission of response signals but also non-patent documents 5 and 6.
- a unit band group (which may be expressed as “Component carrier set” in English) composed of downlink unit bands 1 and 2 and uplink unit band 1 is set for terminal 1.
- downlink resource allocation information is transmitted from the base station to the terminal 1 via the PDCCH of each of the downlink unit bands 1 and 2, downlink data is transmitted using resources corresponding to the downlink resource allocation information.
- a response signal is mapped to a PUCCH resource included in the PUCCH region 1, and a first phase point (for example, a phase point such as (1,0)) is used as a phase point of the response signal.
- a first phase point for example, a phase point such as (1,0)
- the response signal is mapped to the PUCCH resource included in PUCCH region 2, and A first phase point is used. That is, when there are two downlink unit bands, there are four patterns of error detection results, and therefore, these four patterns can be represented by a combination of two resources and two types of phase points. Therefore, BPSK having two phase points is used as a modulation method.
- the base station side secures a plurality of PUCCH resources for any terminal. I have to leave.
- the downlink unit band 1 and the uplink unit band 1 in FIG. 3 are associated with each other to form a band pair, and the downlink unit band 2 and the uplink unit band 2 are associated with each other to form a band pair. Therefore, it suffices if a PUCCH corresponding to the downlink unit band 2 is prepared only for the uplink unit band 2.
- the downlink unit band 2 and the uplink unit band 1 are associated with the unit band unique to the LTE-A terminal. Therefore, it is necessary to secure the PUCCH resource for the response signal for the downlink unit band 2 even in the uplink unit band 1. That is, the uplink control channel (PUCCH) of the uplink unit band 1 needs to be provided with an additional region (PUCCH region 2) in addition to the basic region (PUCCH region 1).
- the PUCCH overhead in the case of applying Channel Selection as a response signal transmission method in the LTE-A system is significantly larger than that in the LTE system.
- the additional overhead for the LTE system increases as the asymmetry between the downlink unit band and the uplink unit band of the terminal increases as shown in FIG.
- the terminal can receive downlink allocation control information in a certain downlink unit band. In the case of failure, the terminal cannot recognize which PUCCH resource in the PUCCH region associated with the unit band should be used.
- Whether or not the base station retransmits the downlink data is determined by whether or not the terminal has notified the ACK for the downlink data. That is, not only when the terminal successfully receives downlink assignment control information and fails to decode downlink data, but also when the terminal fails to receive downlink assignment control information itself, the base station Will be resent. However, whether or not reception of downlink assignment control information in a certain downlink unit band has failed is detected based on DAI (Downlink Assignment Indicator) notified by the downlink assignment control information of each downlink unit band. This DAI is information indicating in which downlink unit band the downlink resource is allocated to the terminal. The terminal feeds back a response signal to the base station by treating the case where reception of downlink allocation control information itself fails as the case where decoding of downlink data fails fails.
- DAI Downlink Assignment Indicator
- downlink data is transmitted to the terminal using two downlink unit bands.
- two downlink unit bands there are two states of reception success (ACK) or reception failure (that is, NACK or DTX) for each downlink data on the terminal side.
- ACK reception success
- NACK reception failure
- DTX reception failure
- the terminal side fails to receive the downlink allocation control information transmitted in the downlink unit band 1, the terminal cannot determine which PUCCH resource in the PUCCH region 1 should be used. Therefore, in order to notify the reception failure of the downlink allocation control information transmitted in the downlink unit band 1, an alternative means such as using a PUCCH resource in the PUCCH region 2 is necessary. For this reason, even when downlink data is transmitted to the terminal using two downlink unit bands, it is necessary to allocate the PUCCH resources of both the PUCCH region 1 and the PUCCH region 2 to the terminal.
- downlink data is transmitted to the terminal using three downlink unit bands.
- the error detection result pattern is 2 ⁇ .
- the terminal side fails to receive the downlink allocation control information transmitted in the downlink unit band 1, the terminal cannot determine which PUCCH resource in the PUCCH region 1 should be used. Also, if the terminal side fails to receive downlink allocation control information transmitted in the downlink unit band 2, the terminal cannot determine which PUCCH resource in the PUCCH region 2 should be used. Therefore, in order to notify the reception failure of the downlink allocation control information transmitted in the downlink unit bands 1 and 2, for example, an alternative means such as using a PUCCH resource in the PUCCH region 3 is necessary. For this reason, even when downlink data is transmitted to the terminal using three downlink unit bands, it is necessary to allocate PUCCH resources in the three areas of the PUCCH areas 1, 2, and 3 to the terminal.
- An object of the present invention is to provide a terminal apparatus and a retransmission control method capable of reducing the overhead of an uplink control channel when ARQ is applied in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band. Is to provide.
- the terminal apparatus communicates with a base station using a unit band group including a plurality of downlink unit bands and an uplink unit band, and detects errors in a plurality of downlink data arranged in the plurality of downlink unit bands.
- Control information for transmitting one bundle response signal on the uplink control channel of the uplink unit band based on the result, and receiving downlink allocation control information transmitted on the downlink control channels of the plurality of downlink unit bands
- Response control means for transmitting the bundle response signal using the information and when the response control means has three downlink unit bands included in the unit band group, information on the uplink unit band
- An error is detected in the downlink data transmitted on the downlink data channel indicated by the downlink allocation control information received by the downlink allocation control information transmitted in the basic unit band that is the downlink unit band to which the broadcast channel signal including If not, the bundle response signal is transmitted using the resources in the basic region associated with the downlink control channel of the basic unit band, and the downlink allocation control information transmitted in the basic unit band has failed to be received. Or the downlink data control indicated by the downlink allocation control information received by the downlink allocation control information transmitted in the basic unit band. When an error in the downlink data transmitted by the channel is detected, it sends the beam response signal using a resource of the additional area.
- the retransmission control method of the present invention includes a control information receiving step for receiving downlink allocation control information transmitted on downlink control channels of a plurality of downlink unit bands included in a unit band group, and a downlink data channel indicated by the downlink allocation control information
- a downlink data reception step for receiving downlink data transmitted in step (b), an error detection step for detecting a reception error in the received downlink data, an error detection result obtained by the error detection means, and the downlink allocation control information Based on the success or failure of reception, error detection of a plurality of downlink data arranged in the plurality of downlink unit bands using either the basic region or the additional region of the uplink control channel in the uplink unit band included in the unit band group
- a response control step for transmitting one bundle response signal based on the result, and the response control step.
- the downlink transmitted in the basic unit band which is the downlink unit band in which the broadcast channel signal including the information on the uplink unit band is transmitted.
- allocation control information is received and no error is detected in downlink data transmitted on the downlink data channel indicated by the downlink allocation control information
- resources in the basic region associated with the downlink control channel of the basic unit band are The bundle response signal is transmitted and reception of downlink allocation control information transmitted in the basic unit band fails, or downlink allocation control information transmitted in the basic unit band is received and the downlink allocation
- the additional area is The bundle response signal is transmitted using the resources of the inner.
- a terminal device and a retransmission control method that can reduce the overhead of an uplink control channel when ARQ is applied in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band. Can be provided.
- diffusion method of a response signal and a reference signal Diagram for explaining asymmetric Carrier Car aggregation and its control sequence applied to individual terminals The figure which serves for explanation of ARQ control when Carrier aggregation is applied to the terminal.
- the figure which serves for explanation of ARQ control when Carrier aggregation is applied to the terminal The figure which serves for explanation of ARQ control when Carrier aggregation is applied to the terminal.
- the block diagram which shows the structure of the terminal which concerns on Embodiment 1 of this invention. Diagram for explaining operation of base station and terminal The figure where it uses for description of operation
- the base station 100 is configured to be able to support both communication using asymmetric carrier aggregation and communication not using carrier aggregation.
- communication that does not depend on Carrier aggregation can be performed between the base station 100 and the terminal 200 depending on resource allocation to the terminal 200 by the base station 100.
- this communication system when communication not based on Carrier aggregation is performed, ARQ is performed as usual, whereas when communication based on Carrier aggregation is performed, Channel Selection is employed in ARQ. That is, this communication system is, for example, an LTE-A system, the base station 100 is, for example, an LTE-A base station, and the terminal 200 is, for example, an LTE-A terminal. Moreover, the terminal which does not have the capability to perform communication by Carrier aggregation is, for example, an LTE terminal.
- an asymmetric carrier aggregation unique to the terminal 200 is configured in advance between the base station 100 and the terminal 200, and information on the downlink unit band and the uplink unit band to be used by the terminal 200 is obtained between the base station 100 and the terminal 200. Shared between. Further, a downlink unit in which a BCH for transmitting information on uplink unit bands constituting a unit band group configured (configured) by the base station 100 for an arbitrary terminal 200 and notified to the terminal 200 in advance is transmitted.
- the band is a “basic unit band” for the terminal 200.
- Information on the basic unit band is “basic unit band information”. Therefore, any terminal 200 can recognize the basic unit band information by reading the BCH information in each downlink unit band.
- FIG. 6 is a block diagram showing a configuration of base station 100 according to Embodiment 1 of the present invention.
- the base station 100 includes a control unit 101, a control information generation unit 102, an encoding unit 103, a modulation unit 104, a broadcast signal generation unit 105, an encoding unit 106, and a data transmission control unit 107.
- 116 sequence control section 117, correlation processing section 118, determination section 119, and retransmission control signal generation section 120.
- the control unit 101 transmits, to the resource allocation target terminal 200, downlink resources for transmitting control information (that is, downlink control information allocation resources) and downlink data included in the control information.
- Assign (assign) downlink resources (that is, downlink data allocation resources).
- This resource allocation is performed in the downlink unit band included in the unit band group set in the resource allocation target terminal 200.
- the downlink control information allocation resource is selected in a resource corresponding to a downlink control channel (PDCCH) in each downlink unit band.
- the downlink data allocation resource is selected in a resource corresponding to a downlink data channel (PDSCH) in each downlink unit band.
- the control unit 101 allocates different resources to each of the resource allocation target terminals 200.
- the downlink control information allocation resource is equivalent to the above-mentioned L1 / L2CCH. That is, the downlink control information allocation resource is composed of one or a plurality of CCEs.
- each CCE in the basic unit band is associated one-to-one with the configuration resource of the uplink control channel region (PUCCH region) in the uplink unit band in the unit band group.
- control unit 101 determines a coding rate used when transmitting control information to the resource allocation target terminal 200. Since the data amount of control information differs according to the coding rate, downlink control information allocation resources having a number of CCEs to which control information of this data amount can be mapped are allocated by the control unit 101.
- control unit 101 generates DAI (Downlink Assignment Indicator) that is information indicating in which downlink unit band the downlink resource is allocated to the resource allocation target terminal 200.
- DAI Downlink Assignment Indicator
- control part 101 outputs the information regarding a downlink data allocation resource, and DAI to the control information generation part 102.
- the control unit 101 outputs information on the coding rate to the coding unit 103.
- Control unit 101 also determines the coding rate of transmission data (that is, downlink data) and outputs the coding rate to coding unit 106.
- the control unit 101 outputs information on downlink data allocation resources and downlink control information allocation resources to the mapping unit 109. However, the control unit 101 performs control so that downlink data and downlink control information for the downlink data are mapped to the same downlink unit band.
- control unit 101 outputs a control signal for generating a broadcast channel signal (BCH) to be transmitted to the broadcast signal generation unit 105.
- BCH broadcast channel signal
- the control information generation unit 102 generates information related to downlink data allocation resources and control information including DAI, and outputs the control information to the encoding unit 103.
- This control information is generated for each downlink unit band.
- the control information includes the terminal ID of the destination terminal in order to distinguish the resource allocation target terminals 200 from each other. For example, CRC bits masked with the terminal ID of the destination terminal are included in the control information.
- This control information may be referred to as “downlink allocation control information”.
- the DAI is included in all control information for the resource allocation target terminal 200.
- the encoding unit 103 encodes the control information according to the encoding rate received from the control unit 101, and outputs the encoded control information to the modulation unit 104.
- Modulation section 104 modulates the encoded control information and outputs the obtained modulated signal to mapping section 109.
- the notification signal generation unit 105 generates a notification signal (BCH) for each downlink unit band according to the information received from the control unit 101 and the control signal, and outputs the notification signal (BCH) to the mapping unit 109.
- BCH notification signal
- Encoding section 106 receives transmission data (that is, downlink data) for each destination terminal 200 and encoding rate information from control section 101 as input, encodes the transmission data, and outputs the encoded transmission data to data transmission control section 107. However, when a plurality of downlink unit bands are allocated to destination terminal 200, the transmission data transmitted in each downlink unit band is encoded, and the encoded transmission data is output to data transmission control section 107. .
- the data transmission control unit 107 holds the encoded transmission data and outputs it to the modulation unit 108 at the time of initial transmission.
- the encoded transmission data is held for each destination terminal 200. Transmission data to one destination terminal 200 is held for each downlink unit band to be transmitted. As a result, not only retransmission control of the entire data transmitted to the destination terminal 200 but also retransmission control for each downlink unit band is possible.
- data transmission control section 107 when data transmission control section 107 receives NACK or DTX for downlink data transmitted in a certain downlink unit band from retransmission control signal generation section 120, data transmission control section 107 outputs retained data corresponding to this downlink unit band to modulation section 108. .
- the data transmission control unit 107 receives an ACK for downlink data transmitted in a certain downlink unit band from the retransmission control signal generation unit 120, the data transmission control unit 107 deletes the retained data corresponding to the downlink unit band.
- Modulation section 108 modulates the encoded transmission data received from data transmission control section 107, and outputs the modulated signal to mapping section 109.
- the mapping unit 109 maps the modulation signal of the control information received from the modulation unit 104 to the resource indicated by the downlink control information allocation resource received from the control unit 101, and outputs it to the IFFT unit 110.
- mapping section 109 maps the modulation signal of the transmission data received from modulation section 108 to the resource indicated by the downlink data allocation resource received from control section 101 and outputs it to IFFT section 110.
- mapping unit 109 maps broadcast information to predetermined time / frequency resources and outputs the information to the IFFT unit 110.
- Control information, transmission data, and broadcast signals mapped to a plurality of subcarriers in a plurality of downlink unit bands by mapping section 109 are converted from frequency domain signals to time domain signals by IFFT section 110, and are then sent to CP adding section 111.
- the wireless transmission unit 112 After the CP is added to the OFDM signal, the wireless transmission unit 112 performs transmission processing such as D / A conversion, amplification and up-conversion, and transmits the signal to the terminal 200 via the antenna.
- the wireless reception unit 113 receives the response signal or the reference signal transmitted from the terminal 200 via the antenna, and performs reception processing such as down-conversion and A / D conversion on the response signal or the reference signal.
- the CP removal unit 114 removes the CP added to the response signal or the reference signal after reception processing.
- the PUCCH extraction unit 115 extracts the uplink control channel signal included in the received signal for each PUCCH region, and distributes the extracted signal.
- the uplink control channel signal may include a response signal and a reference signal transmitted from the terminal 200.
- the despreading sections 116-1 and 116-2, the correlation processing sections 118-1 and 118, and the determination sections 119-1 and 119-2 process the uplink control channel signal extracted in the PUCCH areas 1 and 2.
- Base station 100 is provided with a processing system of despreading section 116, correlation processing section 118, and determination section 119 corresponding to each of PUCCH regions 1 and 2 used by base station 100.
- the PUCCH region 1 is a basic region of an uplink control channel, which will be described later, and the PUCCH region 2 is an additional region of the uplink control channel.
- despreading section 116 despreads the signal corresponding to the response signal in the orthogonal code sequence that terminal 200 should use for secondary spreading in each PUCCH region, and performs correlation processing on the signal after despreading To the unit 118. Further, despreading section 116 despreads the signal corresponding to the reference signal in the orthogonal code sequence that terminal 200 should use for spreading the reference signal in each uplink unit band, and the signal after despreading is the correlation processing section. It outputs to 118.
- the sequence control unit 117 generates a ZAC sequence that may be used for spreading the response signal and the reference signal transmitted from the terminal 200. Also, sequence control section 117 determines a correlation window in which the signal component from terminal 200 should be included in each of PUCCH regions 1 and 2 based on code resources (for example, cyclic shift amount) that terminal 200 may use. Identify. Sequence control section 117 then outputs information indicating the identified correlation window and the generated ZAC sequence to correlation processing section 118.
- Correlation processing section 118 may use the signal input from despreading section 116 and the first spreading in terminal 200 using the information indicating the correlation window input from sequence control section 117 and the ZAC sequence. A correlation value with the ZAC sequence is obtained and output to the determination unit 119.
- the determination unit 119 uses an ACK or NACK (or DTX) as a response signal transmitted from the terminal for data transmitted in each downlink unit band. Determine if there is. That is, if the magnitude of the correlation value input from correlation processing section 118 is equal to or smaller than a certain threshold, determination section 119 determines that terminal 200 has not transmitted ACK or NACK using the resource, and the correlation If the magnitude of the value is greater than or equal to the threshold value, it is further determined by synchronous detection which phase point the response signal indicates. Then, determination section 119 outputs the determination result in each PUCCH region to retransmission control signal generation section 120.
- ACK or NACK or DTX
- the retransmission control signal generation unit 120 determines whether or not the data transmitted in each downlink unit band should be retransmitted based on the information input from the determination unit 119, and generates a retransmission control signal based on the determination result.
- retransmission control signal generation section 120 determines which PUCCH region corresponding to determination sections 119-1 and 119-2 has detected the maximum correlation value.
- an ACK signal or NACK signal for data transmitted in each downlink unit band is individually generated depending on which phase point the response signal transmitted in the PUCCH region in which the maximum correlation value is detected indicates. And output to the data transmission control unit 107.
- retransmission control signal generation section 120 determines that no response signal is transmitted from terminal 200, and transmits all downlink data.
- DTX is generated and output to the data transmission control unit 107.
- FIG. 7 is a block diagram showing a configuration of terminal 200 according to Embodiment 1 of the present invention.
- terminal 200 includes radio reception section 201, CP removal section 202, FFT section 203, extraction section 204, broadcast signal reception section 205, demodulation section 206, decoding section 207, and determination section 208.
- the radio reception unit 201 receives an OFDM signal transmitted from the base station 100 via an antenna, and performs reception processing such as down-conversion and A / D conversion on the received OFDM signal.
- CP removing section 202 removes the CP added to the OFDM signal after reception processing.
- the FFT unit 203 performs FFT on the received OFDM signal and converts it into a frequency domain signal, and outputs the obtained received signal to the extracting unit 204.
- the extraction unit 204 extracts a notification signal from the reception signal received from the FFT unit 203 and outputs the notification signal to the notification signal reception unit 205. Since the resource to which the broadcast signal is mapped is determined in advance, the extraction unit 204 extracts information mapped to the resource. In addition, the extracted broadcast signal includes information regarding the association between each downlink unit band and the uplink unit band.
- the extraction unit 204 extracts a downlink control channel signal (PDCCH signal) from the received signal received from the FFT unit 203 according to the input coding rate information. That is, since the number of CCEs constituting the downlink control information allocation resource changes according to the coding rate, the extraction unit 204 extracts the downlink control channel signal using the number of CCEs corresponding to the coding rate as an extraction unit. . Further, the downlink control channel signal is extracted for each downlink unit band. The extracted downlink control channel signal is output to demodulation section 206.
- PDCCH signal downlink control channel signal
- the extraction unit 204 extracts downlink data from the received signal based on the information regarding the downlink data allocation resource addressed to the own device received from the determination unit 208 and outputs the downlink data to the demodulation unit 210.
- the broadcast signal receiving unit 205 decodes each broadcast signal included in each downlink unit band, and is notified by information on the uplink unit band that forms a pair with each downlink unit band (that is, SIB2 mapped to each downlink unit band). Information on the upstream unit band). Also, the broadcast signal receiving unit 205 recognizes the downlink unit band paired with the uplink unit band included in the unit band group for the own device as the “basic unit band”, and determines the basic unit band information by the determination unit 208 and the control unit. Output to the unit 209.
- the demodulating unit 206 demodulates the downlink control channel signal received from the extracting unit 204 and outputs the obtained demodulation result to the decoding unit 207.
- the decoding unit 207 decodes the demodulation result received from the demodulation unit 206 according to the input coding rate information, and outputs the obtained decoding result to the determination unit 208.
- the determination unit 208 identifies the CCE to which the control information addressed to the above-described device is mapped in the downlink control channel of the basic unit band, and outputs the identified CCE identification information to the control unit 209.
- the control unit 209 specifies the PUCCH resource (frequency / code) corresponding to the CCE indicated by the CCE identification information received from the determination unit 208. That is, the control unit 209 specifies a PUCCH resource (that is, “basic PUCCH resource”) in the basic region of the uplink control channel based on the CCE identification information. However, the control unit 209 holds in advance information related to the PUCCH resource (that is, “additional PUCCH resource”) in the additional region for Channel selection, which is notified from the base station 100 to the terminal 200.
- control unit 209 uses which of the basic PUCCH resource and the additional PUCCH resource to transmit the response signal. decide. That is, the control unit 209 determines which one of the basic PUCCH resource and the additional PUCCH resource is used for transmission of the response signal according to an error detection result pattern regarding a plurality of downlink data. Further, the control unit 209 determines which phase point is set in the response signal based on the reception success / failure situation of the downlink data in each downlink unit band input from the CRC unit 212. That is, the control unit 209 also controls the modulation scheme (for example, the modulation multi-level number).
- the modulation scheme for example, the modulation multi-level number
- control unit 209 outputs information on the phase point to be set to the response signal generation unit 213, outputs the ZAC sequence corresponding to the PUCCH resource to be used and the cyclic shift amount to the primary spreading unit 215, and the frequency resource. Information is output to IFFT section 217. Also, the control unit 209 outputs an orthogonal code sequence corresponding to the PUCCH resource to be used to the secondary spreading unit 216. Details of control of the PUCCH resource and the phase point by the control unit 209 will be described later.
- Demodulation section 210 demodulates the downlink data received from extraction section 204 and outputs the demodulated downlink data to decoding section 211.
- Decoding section 211 decodes the downlink data received from demodulation section 210, and outputs the decoded downlink data to CRC section 212.
- the response signal generation unit 213 generates a response signal and a reference signal based on the phase point of the response signal instructed from the control unit 209, and outputs the response signal and the reference signal to the modulation unit 214.
- Modulation section 214 modulates the response signal input from response signal generation section 213 and outputs it to primary spreading section 215.
- the primary spreading unit 215 performs first spreading of the response signal and the reference signal based on the ZAC sequence and the cyclic shift amount set by the control unit 209, and the response signal and the reference signal after the first spreading are processed by the secondary spreading unit 216. Output to. That is, primary spreading section 215 performs primary spreading of the response signal and the reference signal in accordance with an instruction from control section 209.
- Secondary spreading section 216 performs second spreading of the response signal and reference signal using the orthogonal code sequence set by control section 209, and outputs the signal after the second spreading to IFFT section 217. That is, the second spreading section 216 performs second spreading on the response signal and reference signal after the first spreading using the orthogonal code sequence corresponding to the PUCCH resource selected by the control section 209, and the spread signal is the IFFT section. To 217.
- CP adding section 218 adds the same signal as the tail part of the signal after IFFT to the head of the signal as CP.
- the wireless transmission unit 219 performs transmission processing such as D / A conversion, amplification, and up-conversion on the input signal. Then, the wireless transmission unit 219 transmits a signal from the antenna to the base station 100.
- FIG. 8 is a diagram for explaining operations of the base station 100 and the terminal 200.
- broadcast signal receiving section 205 identifies a downlink unit band in which BCH for broadcasting information related to an uplink unit band constituting a unit band group notified to terminal 200 is transmitted as a basic unit band.
- the determination unit 208 determines whether or not downlink allocation control information addressed to itself is included in the downlink control channel of each downlink unit band, and outputs the downlink allocation control information addressed to itself to the extraction unit 204.
- the extraction unit 204 extracts downlink data from the received signal based on the downlink allocation control information received from the determination unit 208.
- terminal 200 can receive downlink data transmitted from base station 100.
- the BCH that broadcasts information related to the uplink unit band 1 is transmitted in the downlink unit band 1, so the downlink unit band 1 becomes the basic unit band of the terminal 200.
- the downlink allocation control information transmitted in the downlink unit band 1 includes information on resources used for transmission of downlink data (DL data) transmitted in the downlink unit band 1, and is transmitted in the downlink unit band 2.
- the downlink allocation control information to be transmitted includes information on resources used for transmission of downlink data transmitted in the downlink unit band 2
- the downlink allocation control information transmitted in the downlink unit band 3 includes the downlink unit band.
- 3 includes information on resources used for transmission of downlink data transmitted in step 3.
- terminal 200 can receive downlink data in downlink unit bands 1, 2, 3 by receiving downlink allocation control information transmitted in downlink unit bands 1, 2, 3. Conversely, if the terminal cannot receive downlink assignment control information in a certain downlink unit band, terminal 200 cannot receive downlink data in the downlink band.
- the terminal 200 can recognize the downlink unit band in which the downlink allocation control information is transmitted by the DAI transmitted in each downlink unit band.
- CRC section 212 performs error detection on downlink data corresponding to downlink allocation control information that has been successfully received, and outputs an error detection result to control section 209.
- control unit 209 performs transmission control of the response signal as follows.
- the control unit 209 performs the basic PUCCH resource (That is, a response signal is transmitted using the resource of PUCCH region 1).
- this basic PUCCH resource is determined in association with the CCE occupied by the downlink allocation control information transmitted to terminal 200 in the basic unit band.
- the basic region including the basic PUCCH resource is a region where a response signal from the LTE terminal and a response signal from the LTE-A terminal coexist.
- the control unit 209 adds the additional PUCCH resource (that is, the resource of the PUCCH region 2) when “the downlink data is not successfully received” transmitted in the basic unit band (that is, the downlink unit band 1). A response signal is transmitted using.
- Information on the additional PUCCH resource is shared between the base station 100 and the terminal 200 in advance as described above. Further, the additional region including the additional PUCCH resource is an additional PUCCH region notified to the LTE-A terminal.
- the following two cases are included in the above-mentioned case “when the downlink data is not successfully received”.
- the first case where the downlink allocation control information corresponding to the downlink data is successfully received and the decoding result of the downlink data has an error, and the presence of the downlink data due to the DAI included in the received downlink allocation control signal.
- the terminal receives a downlink assignment control signal in some downlink unit bands and recognizes that downlink data is assigned in other downlink unit bands by the DAI included therein.
- the downlink allocation control signal in other downlink unit bands has failed to be received (that is, when DTX occurs in other downlink unit bands)
- the downlink allocation control signal reception fails. It is handled in the same way as the case of “with error” in the downlink unit band.
- the base station 100 notifies the terminal 200 in advance of the PUCCH resource to be used as the additional PUCCH resource.
- the basic PUCCH resource is determined in association with the CCE number occupied by the downlink allocation control information in the basic unit band.
- All states including “NACK” or “DTX” in the basic unit band are notified by the phase point of the response signal mapped to the additional PUCCH resource.
- the control unit 209 when the control unit 209 includes three downlink unit bands included in the unit band group, the downlink unit in which a broadcast channel signal including information related to the uplink unit band of the unit band group is transmitted.
- the downlink allocation control information transmitted in the basic unit band which is a band
- no error is detected in the downlink data transmitted in the downlink data channel indicated by the downlink allocation control information
- it is associated with the downlink control channel of the basic unit band
- the bundle response signal is transmitted using the resources in the basic region of the uplink control channel in the uplink unit band.
- control unit 209 fails to receive the downlink allocation control information transmitted in the basic unit band, or receives the downlink allocation control information transmitted in the basic unit band and indicates the downlink indicated by the downlink allocation control information.
- a bundle response signal is transmitted using resources in the additional region of the uplink control channel that has been previously notified to the terminal 200 by the base station 100.
- the overhead of the uplink control channel can be reduced when ARQ is applied in communication using the uplink unit band and a plurality of downlink unit bands associated with the uplink unit band.
- the basic area including the basic PUCCH resource and the additional area including the additional PUCCH resource are assumed to be non-overlapping.
- the present invention is not limited to this, and part or all of the basic area and the additional area may overlap.
- the base station controls the basic PUCCH resource and the additional PUCCH resource that a certain terminal should recognize in a certain subframe. In this way, the base station 100 prepares the basic area and the additional area in an overlapping manner, whereby the PUCCH overhead in this system is reduced to the same level as in the LTE system.
- the base station 100 notifies the terminal 200 of the PUCCH resource that should be used as the additional PUCCH resource in advance, but even if the base station 100 does not notify in advance, for example, Information bits indicating the additional PUCCH resource may be included in all downlink allocation control information transmitted in downlink unit bands other than the basic unit band. In short, it suffices if one additional PUCCH resource can be recognized on the terminal 200 side when at least one downlink allocation control information transmitted in a downlink unit band other than the basic unit band is successfully received.
- sequences that can be separated from each other by different cyclic shift amounts other than the ZAC sequence may be used for the first spreading.
- GCL Generalized Chirp like
- CAZAC Constant Amplitude Zero Auto Correlation
- ZC Zero Auto Correlation
- PN sequence such as M sequence and orthogonal gold code sequence
- time randomly generated by a computer A sequence having a sharp autocorrelation characteristic on the axis may be used for the first spreading.
- any sequence may be used as the orthogonal code sequence as long as the sequences are orthogonal to each other or sequences that can be regarded as being substantially orthogonal to each other.
- a Walsh sequence or a Fourier sequence can be used for quadratic spreading as an orthogonal code sequence.
- the response signal resource (for example, PUCCH resource) is defined by the cyclic shift amount of the ZAC sequence and the sequence number of the orthogonal code sequence.
- Embodiment 2 In Embodiment 1, the case has been described where the number of downlink unit bands set in the terminal is three.
- the second embodiment is different from the first embodiment in that the number of downlink unit bands set in the terminal is two. Thereby, PUCCH overhead is further reduced in the second embodiment than in the first embodiment.
- base station 100 according to Embodiment 2 does not use 116-1, 118-1, 119-1 such as a processing system related to PUCCH region 1.
- control section 209 transmits a response signal using a phase point corresponding to the pattern of successful reception of a plurality of downlink assignment control signals and the pattern of error detection results for a plurality of downlink data. To do.
- the control unit 209 uses the additional PUCCH resource for transmission of the response signal.
- FIG. 9 is a diagram for explaining operations of the base station 100 and the terminal 200.
- Terminal 200 is notified in advance of an additional PUCCH resource to be used for transmission of a response signal from base station 100.
- terminal 200 does not use a basic PUCCH resource defined in association with a CCE of a basic unit band.
- broadcast signal receiving section 205 identifies a downlink unit band in which BCH for broadcasting information related to an uplink unit band constituting a unit band group notified to terminal 200 is transmitted as a basic unit band.
- the determination unit 208 determines whether or not downlink allocation control information addressed to itself is included in the downlink control channel of each downlink unit band, and outputs the downlink allocation control information addressed to itself to the extraction unit 204.
- the extraction unit 204 extracts downlink data from the received signal based on the downlink allocation control information received from the determination unit 208.
- terminal 200 can receive downlink data transmitted from base station 100.
- the BCH that broadcasts information related to the uplink unit band 1 is transmitted in the downlink unit band 1, so the downlink unit band 1 becomes the basic unit band of the terminal 200.
- the downlink allocation control information transmitted in the downlink unit band 1 includes information on resources used for transmission of downlink data (DL data) transmitted in the downlink unit band 1, and is transmitted in the downlink unit band 2.
- the downlink allocation control information to be included includes information on resources used for transmission of downlink data transmitted in the downlink unit band 2.
- terminal 200 can receive downlink data in downlink unit bands 1 and 2 by receiving downlink allocation control information transmitted in downlink unit bands 1 and 2. Conversely, if the terminal cannot receive downlink assignment control information in a certain downlink unit band, terminal 200 cannot receive downlink data in the downlink band.
- the terminal 200 can recognize the downlink unit band in which the downlink allocation control information is transmitted by the DAI transmitted in each downlink unit band.
- CRC section 212 performs error detection on downlink data corresponding to downlink allocation control information that has been successfully received, and outputs an error detection result to control section 209.
- control unit 209 performs response signal transmission control as follows.
- control unit 209 transmits the response signal using the additional PUCCH resource regardless of the reception success / failure pattern of the plurality of downlink allocation control signals and the error detection result pattern regarding the plurality of downlink data.
- Information on the additional PUCCH resource is shared between the base station 100 and the terminal 200 in advance as described above.
- the terminal receives a downlink assignment control signal in some downlink unit bands and recognizes that downlink data is assigned in other downlink unit bands by the DAI included therein.
- the downlink allocation control signal in other downlink unit bands has failed to be received (that is, when DTX occurs in other downlink unit bands)
- the downlink allocation control signal reception fails. It is handled in the same way as the case of “with error” in the downlink unit band.
- the present invention is not limited to this, and can be applied even when symmetric carrier aggregation is set for data transmission.
- a plurality of PUCCH regions are defined in the uplink unit band included in the unit band group of the terminal, and the PUCCH resource in which PUCCH resource is used is determined according to the reception success / failure situation of the downlink data. In any case, the present invention is applicable.
- the ZAC sequence in each of the above embodiments may be referred to as a Base sequence in the sense that it is a sequence that is a base on which a cyclic shift process is performed.
- the Walsh sequence is sometimes referred to as a Walsh code sequence.
- the spreading unit in each of the above embodiments is a process of multiplying a certain signal by a sequence, and therefore may be referred to as a multiplication unit.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the terminal apparatus and retransmission control method of the present invention can reduce the overhead of an uplink control channel when ARQ is applied in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band. Useful.
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Abstract
Description
[通信システムの概要]
後述する基地局100及び端末200を含む通信システムでは、上り単位バンド及び上り単位バンドと対応づけられた3つの下り単位バンドを使用した通信、つまり、端末200独自の非対称Carrier aggregationによる通信が行われる。また、この通信システムには、端末200と異なり、Carrier aggregationによる通信を行う能力が無く、1つの下り単位バンドとこれに対応づけられた1つの上り単位バンドによる通信(つまり、Carrier aggregationによらない通信)を行う端末も含まれている。
図6は、本発明の実施の形態1に係る基地局100の構成を示すブロック図である。図6において、基地局100は、制御部101と、制御情報生成部102と、符号化部103と、変調部104と、報知信号生成部105と、符号化部106と、データ送信制御部107と、変調部108と、マッピング部109と、IFFT部110と、CP付加部111と、無線送信部112と、無線受信部113と、CP除去部114と、PUCCH抽出部115と、逆拡散部116と、系列制御部117と、相関処理部118と、判定部119と、再送制御信号生成部120とを有する。
図7は、本発明の実施の形態1に係る端末200の構成を示すブロック図である。図7において、端末200は、無線受信部201と、CP除去部202と、FFT部203と、抽出部204と、報知信号受信部205と、復調部206と、復号部207と、判定部208と、制御部209と、復調部210と、復号部211と、CRC部212と、応答信号生成部213と、変調部214と、1次拡散部215と、2次拡散部216と、IFFT部217と、CP付加部218と、無線送信部219とを有する。
以上の構成を有する基地局100及び端末200の動作について説明する。図8は、基地局100及び端末200の動作説明に供する図である。
端末200では、報知信号受信部205が、端末200に通知された単位バンドグループを構成する上り単位バンドに関する情報を報知するBCHが送信される下り単位バンドを基本単位バンドとして特定する。
CRC部212は、受信に成功した下り割当制御情報に対応する下り回線データについて誤り検出を行い、誤り検出結果を制御部209へ出力する。
(要素技術1)端末200側で、或る下り単位バンドにおいて下り割当制御信号の受信に成功したが下り回線データの復号に失敗したことを示す「NACK」と、或る下り単位バンドにおいて下り割当制御信号の受信に失敗したがその他の下り単位バンドにおいて受信した下り割当制御情報に含まれるDAIより当該下り単位バンドに下り回線データの割当があったことを知ったことを示す「DTX」とが、同等に扱われる。
(要素技術2)端末200に対し、基地局100が予め追加PUCCHリソースとして用いられるべきPUCCHリソースを通知しておく。ただし、基本PUCCHリソースは、基本単位バンドにおいて下り割当制御情報が占有していたCCE番号と関連付けられて決定される。
(要素技術3)基本単位バンドにおける「NACK」または「DTX」を含む全ての状態が、追加PUCCHリソースにマッピングされる応答信号の位相点によって通知される。
実施の形態1では、端末に設定される下り単位バンド数が3である場合について説明した。実施の形態2では、端末に設定される下り単位バンド数が2である点において、実施の形態1と相違する。これにより、実施の形態2では、実施の形態1よりも更にPUCCHオーバーヘッドが削減される。
図9は、基地局100及び端末200の動作説明に供する図である。
端末200は、基地局100から、応答信号の送信に用いるべき追加PUCCHリソースが予め通知されている。ただし、実施の形態1と異なり、端末200は、基本単位バンドのCCEと関連付けられて定義される基本PUCCHリソースを利用しない。
端末200では報知信号受信部205が、端末200に通知された単位バンドグループを構成する上り単位バンドに関する情報を報知するBCHが送信される下り単位バンドを基本単位バンドとして特定する。
CRC部212は、受信に成功した下り割当制御情報に対応する下り回線データについて誤り検出を行い、誤り検出結果を制御部209へ出力する。
(1)上記各実施の形態では、端末に対して構成された非対称Carrier aggregationにおける単位バンドグループの中に、上り単位バンドが1つだけ含まれ、基本PUCCHリソースと追加PUCCHリソースが同一上り単位バンドに含まれる場合について説明した。しかしながら、本発明はこれに限定されるものではなく、単位バンドグループの中に複数の上り単位バンドが含まれており、また、基本PUCCHリソースと追加PUCCHリソースが異なる上り単位バンドにおいて定義されていても良い。
101 制御部
102 制御情報生成部
103 符号化部
104,108,214 変調部
105 報知信号生成部
106 符号化部
107 データ送信制御部
109 マッピング部
110,217 IFFT部
111,218 CP付加部
112,219 無線送信部
113,201 無線受信部
114,202 CP除去部
115 PUCCH抽出部
116 逆拡散部
117 系列制御部
118 相関処理部
119,208 判定部
120 再送制御信号生成部
200 端末
203 FFT部
204 抽出部
205 報知信号受信部
206,210 復調部
207,211 復号部
209 制御部
212 CRC部
213 応答信号生成部
215 1次拡散部
216 2次拡散部
Claims (2)
- 複数の下り単位バンドと上り単位バンドとからなる単位バンドグループを用いて基地局と通信し、且つ、前記複数の下り単位バンドに配置される複数の下りデータの誤り検出結果に基づいて1つの束応答信号を前記上り単位バンドの上り制御チャネルで送信する端末装置であって、
前記複数の下り単位バンドの下り制御チャネルで送信された下り割当制御情報を受信する制御情報受信手段と、
前記下り割当制御情報が示す下りデータチャネルで送信された下りデータを受信する下りデータ受信手段と、
前記受信された下りデータの受信誤りを検出する誤り検出手段と、
前記誤り検出手段で得られた誤り検出結果及び前記下り割当制御情報の受信成否に基づいて、前記上り制御チャネルの基本領域及び追加領域のいずれかを用いて前記束応答信号を送信する応答制御手段と、
を具備し、
前記応答制御手段は、
前記単位バンドグループに含まれる下り単位バンドの数が3つである場合、
前記上り単位バンドに関する情報が含まれる報知チャネル信号が送信される下り単位バンドである基本単位バンドで送信された下り割当制御情報を受信し且つ当該下り割当制御情報が示す下りデータチャネルで送信された下りデータに誤りが検出されないときには、前記基本単位バンドの下り制御チャネルと関連づけられた、前記基本領域内のリソースを用いて前記束応答信号を送信し、
前記基本単位バンドで送信された下り割当制御情報の受信に失敗したとき、又は、前記基本単位バンドで送信された下り割当制御情報を受信し且つ当該下り割当制御情報が示す下りデータチャネルで送信された下りデータに誤りが検出されるときには、前記追加領域内のリソースを用いて前記束応答信号を送信する、
端末装置。 - 単位バンドグループに含まれる複数の下り単位バンドの下り制御チャネルで送信された下り割当制御情報を受信する制御情報受信ステップと、
前記下り割当制御情報が示す下りデータチャネルで送信された下りデータを受信する下りデータ受信ステップと、
前記受信された下りデータの受信誤りを検出する誤り検出ステップと、
前記誤り検出手段で得られた誤り検出結果及び前記下り割当制御情報の受信成否に基づいて、前記単位バンドグループに含まれる上り単位バンドにおける上り制御チャネルの基本領域及び追加領域のいずれかを用いて、前記複数の下り単位バンドに配置される複数の下りデータの誤り検出結果に基づいて1つの束応答信号を送信する応答制御ステップと、
を具備し、
前記応答制御ステップでは、
前記単位バンドグループに含まれる下り単位バンドの数が3つである場合、
前記上り単位バンドに関する情報が含まれる報知チャネル信号が送信される下り単位バンドである基本単位バンドで送信された下り割当制御情報が受信され且つ当該下り割当制御情報が示す下りデータチャネルで送信された下りデータに誤りが検出されないときには、前記基本単位バンドの下り制御チャネルと関連づけられた、前記基本領域内のリソースを用いて前記束応答信号が送信され、
前記基本単位バンドで送信された下り割当制御情報の受信が失敗したとき、又は、前記基本単位バンドで送信された下り割当制御情報が受信され且つ当該下り割当制御情報が示す下りデータチャネルで送信された下りデータに誤りが検出されるときには、前記追加領域内のリソースを用いて前記束応答信号が送信される、
再送制御方法。
Priority Applications (2)
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US13/376,987 US20120087238A1 (en) | 2009-06-19 | 2010-06-18 | Terminal device and retransmission control method |
JP2011519582A JPWO2010146880A1 (ja) | 2009-06-19 | 2010-06-18 | 端末装置および再送制御方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020517143A (ja) * | 2017-04-01 | 2020-06-11 | 深▲セン▼前▲海▼▲達▼▲闥▼▲雲▼端智能科技有限公司Cloudminds (Shenzhen) Robotics Systems Co., Ltd. | 周波数選択方法、ランダムアクセス方法および装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9143280B2 (en) * | 2009-04-21 | 2015-09-22 | Optis Wireless Technology, Llc | Terminal apparatus and retransmission control method |
US8873482B2 (en) * | 2010-03-01 | 2014-10-28 | Nec Laboratories America, Inc. | Method and system for virtualizing a cellular basestation |
US10772153B2 (en) * | 2018-04-27 | 2020-09-08 | Cavium, Llc. | Methods and apparatus for two-stage ACK/DTX detection |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8446870B2 (en) * | 2008-08-08 | 2013-05-21 | Panasonic Corporation | Wireless communication base station device, wireless communication terminal device, and channel allocation method |
WO2010122808A1 (ja) * | 2009-04-24 | 2010-10-28 | パナソニック株式会社 | 基地局装置及び端末装置 |
WO2010143419A1 (ja) * | 2009-06-09 | 2010-12-16 | パナソニック株式会社 | 端末装置及び信号多重制御方法 |
EP2445249A4 (en) * | 2009-06-19 | 2017-06-28 | Sun Patent Trust | Terminal device and retransmission control method |
CN102474390B (zh) * | 2009-08-07 | 2014-09-03 | 松下电器(美国)知识产权公司 | 终端装置及重发控制方法 |
EP2469950B1 (en) * | 2009-08-17 | 2018-01-10 | Panasonic Intellectual Property Corporation of America | Terminal device and signal transmission control method |
AU2010302210B2 (en) * | 2009-10-02 | 2014-04-24 | Sun Patent Trust | Terminal device and retransmission control method |
JP5731482B2 (ja) * | 2010-04-05 | 2015-06-10 | パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカPanasonic Intellectual Property Corporation of America | 端末装置及び応答信号送信方法 |
WO2011138849A1 (ja) * | 2010-05-06 | 2011-11-10 | パナソニック株式会社 | 端末装置及び応答信号マッピング方法 |
JP5552161B2 (ja) * | 2010-05-19 | 2014-07-16 | パナソニック株式会社 | 端末装置及び応答信号送信方法 |
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- 2010-06-18 JP JP2011519582A patent/JPWO2010146880A1/ja active Pending
Non-Patent Citations (3)
Title |
---|
PANASONIC: "Support of UL ACK/NACK channel selection for carrier aggregation", 3GPP TSG RAN WG1 MEETING #60, R1-101253, - 22 February 2010 (2010-02-22) * |
PANASONIC: "UL ACK/NACK transmission on PUCCH for carrier aggregation", 3GPP TSG-RAN WG1 MEETING #57, R1-091744, 4 May 2009 (2009-05-04) * |
ZTE: "Uplink Control Channel Design for LTE-Advanced", TSG-RAN WG1 #57, R1-091702, 4 May 2009 (2009-05-04) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020517143A (ja) * | 2017-04-01 | 2020-06-11 | 深▲セン▼前▲海▼▲達▼▲闥▼▲雲▼端智能科技有限公司Cloudminds (Shenzhen) Robotics Systems Co., Ltd. | 周波数選択方法、ランダムアクセス方法および装置 |
US11224042B2 (en) | 2017-04-01 | 2022-01-11 | Cloudminds (Shenzhen) Robotics Systems Co., Ltd. | Frequency selection method, random access method and apparatuses |
JP7164541B2 (ja) | 2017-04-01 | 2022-11-01 | 達闥機器人股▲分▼有限公司 | 周波数選択方法、ランダムアクセス方法および装置 |
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JPWO2010146880A1 (ja) | 2012-12-06 |
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