WO2014064892A1 - 端末装置、基地局装置、受信方法及び送信方法 - Google Patents
端末装置、基地局装置、受信方法及び送信方法 Download PDFInfo
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- WO2014064892A1 WO2014064892A1 PCT/JP2013/005944 JP2013005944W WO2014064892A1 WO 2014064892 A1 WO2014064892 A1 WO 2014064892A1 JP 2013005944 W JP2013005944 W JP 2013005944W WO 2014064892 A1 WO2014064892 A1 WO 2014064892A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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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
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a terminal device, a base station device, a reception method, and a transmission method.
- OFDMA Orthogonal Frequency Division Multiple Access
- a base station sometimes called an eNB
- transmits a synchronization signal Synchronization Channel: SCH
- a broadcast signal Broadcast Channel: BCH
- the terminal (sometimes referred to as a UE) first secures synchronization with the base station by capturing the SCH. After that, the terminal acquires parameters (for example, 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 downlink control channel such as 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” on each of a plurality of control information (downlink control information (sometimes referred to as Downlink Control Information: DCI)) 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.
- the downlink control information includes DL assignment indicating downlink data assignment information, UL grant indicating uplink data assignment information, and the like.
- UL grant which is uplink data allocation information
- PDCCH Physical Downlink Control Channel
- UL grant indicates allocation of resources in a target subframe four subframes after the subframe in which UL grant is transmitted in an FDD (Frequency Division Duplex) system.
- FDD Frequency Division Duplex
- UL grant indicates allocation of resources in a target subframe four or more subframes after the subframe in which UL grant is transmitted. This will be described more specifically with reference to FIG.
- a downlink unit band sometimes called a downlink CC (Component Carrier)
- an uplink unit band sometimes called an uplink CC
- the downlink unit band can also be expressed as “downlink communication timing in the unit band”.
- the uplink unit band can also be expressed as “uplink communication timing in the unit band”.
- the switching between the downlink unit band and the uplink unit band is based on UL-DL configuration as shown in FIG.
- UL-DL Configuration is notified to the terminal by a notification signal called SIB1 (System Information Block Type 1) (SIB1 notification), and the value is the same throughout the system, and the value may not be changed frequently.
- SIB1 notification System Information Block Type 1
- SIB1 notification System Information Block Type 1
- FIG. 1 shows UL-DL Configurations (Config # 0 to Config # 0) having different subframe ratios for downlink communication and uplink communication.
- the downlink communication subframe is represented by “D”
- the uplink communication subframe is represented by “U”
- the special subframe is represented by “S”.
- the special subframe is a subframe at the time of switching from the downlink communication subframe to the uplink communication subframe.
- downlink data communication may be performed as in the downlink communication subframe.
- a subframe to which uplink data (PUSCH: Physical Uplink Shared Channel) for UL grant is assigned is a subframe in which the UL grant is notified. It is an uplink communication subframe after four or more subframes, and is uniquely defined as shown in FIG.
- HARQ Indicator CHannel Physical Hybrid ARQ Indicator CHannel
- the base station When the base station does not request retransmission to the terminal, the base station transmits ACK using PHICH.
- the base station since the base station can instruct retransmission using only PHICH, there is an advantage that the overhead of a control signal transmitted in the downlink required for instructing retransmission is small.
- the PHICH is notified to the terminal using resources in the target subframe four subframes after the subframe in which the uplink data is transmitted.
- the PHICH is notified to the terminal using resources in the target subframe that is four or more subframes after the subframe in which the uplink data is transmitted.
- FIG. 1 As shown by the broken line arrow (PUSCH-PHICH timing) in FIG. 1, subframes to which ACK / NACK (PHICH) for uplink data (PUSCH) is assigned are four subframes of the subframe in which the uplink data is notified. This is a downstream communication subframe or a special subframe after the above, and is uniquely defined as shown in FIG.
- the base station transmits ACK using PHICH while instructing resources for retransmission and retransmission using UL grant that notifies resource allocation information.
- UL grant has a bit called NDI (New Data Indicator), and this bit is a binary value of 0 or 1.
- the terminal compares the received UL ⁇ grant NDI with the previous UL grant NDI of the same retransmission process (HARQ (Hybrid ARQ) process). If there is a change in the NDI, new data is assigned. If NDI does not change, it is determined that retransmission data has been allocated.
- HARQ Hybrid ARQ
- the amount of resources and MCS can be changed according to the required SINR (Signal-to-Interference and Noise and Power ratio) of the retransmission data, which has an advantage of improving frequency utilization efficiency.
- SINR Signal-to-Interference and Noise and Power ratio
- UL grant has CRC (Cyclic Redundancy Check)
- CRC Cyclic Redundancy Check
- step (hereinafter abbreviated as “ST”) 11 the terminal determines whether there is a UL grant. If there is UL grant (ST11: YES), the process proceeds to ST12, and if there is no UL grant (ST11: NO), the process proceeds to ST15.
- the terminal compares the current UL ⁇ ⁇ grant NDI with the previous UL grant NDI of the same retransmission process to determine whether there is a change in the NDI. If there is a change in NDI (ST12: YES), the process proceeds to ST13, and if there is no change in NDI (ST12: NO), the process proceeds to ST14.
- the terminal transmits new data to the base station in ST13, and adaptively retransmits the retransmission data to the base station in ST14.
- the terminal determines whether PHICH is NACK or not.
- PHICH is NACK
- ST16 the process proceeds to ST16
- PHICH is ACK
- ST17 the process proceeds to ST17.
- the terminal performs non-adaptive retransmission of retransmission data to the base station in ST16, suspends in ST17, and suspends retransmission control.
- 1 RB Resource Block
- 1 RB Resource Block
- the RB pair is 12 subcarriers ⁇ 1 msec.
- the RB pair may be simply referred to as RB.
- a unit of 1 subcarrier ⁇ 1 OFDM symbol is called 1RE (Resource Element).
- One REG Resource Element Group
- 4REs is composed of 4REs.
- PHICH encoding ACK / NACK (1 bit) is repeated three times.
- the number of PHICH is any one of ⁇ 1/6, 1/2, 1, 2 ⁇ times the number of RBs, and is notified by PBCH (Physical Broadcast Channel).
- Eight PHICHs arranged in 3REG are called PHICH groups and are expressed as “PHICH group number (that is, resource number) N group PHICH is eight”. In the FDD system, the number of PHICH groups N group PHICH takes the same value in all subframes.
- FIG. 3B shows how many subframes the PHICH received by the terminal in subframe #n is associated with the PUSCH transmitted by the terminal.
- a blank in FIG. 3B means that PHICH does not exist.
- PHICH is associated with the PUSCH transmitted in subframe # 7 four subframes before (see FIG. 1).
- sub-frame # 1 of the config # 0 since PUSCH in one subframe is associated with a PHICH in one sub-frame, similarly to the FDD system, and 1 the coefficients m i of PHICH number of groups (Fig.
- the PHICH is associated with the PUSCH transmitted in the subframe # 3 before the 7th subframe and the subframe # 4 before the 6th subframe, respectively. ing. That is, in subframe # 0 of Config # 0, the terminal receives PHICH for two PUSCHs. Therefore, the subframe # 0 of Config # 0 requires twice as many PHICH resources (hereinafter referred to as PHICH resources) as compared to the subframe # 1 of Config # 0, so the coefficient m of the number of PHICH groups Let i be 2 (see FIG. 3A).
- two PHICHs addressed to the same terminal and received in the same subframe are distinguished by the parameter I PHICH .
- I PHICH the parameter assigned to the same terminal and received in the same subframe.
- I PHICH 0 at all times.
- the PHICH resource is represented by a combination ⁇ n group PHICH , n seq PHICH ⁇ of an index n group PHICH of the total number of PHICH resources and an index n seq PHICH of an orthogonal sequence.
- the index n group PHICH of the total number of PHICH resources and the index n seq PHICH of the orthogonal sequence are expressed by the following equations (1) and (2), respectively.
- N PHICH SF is a spreading factor (SF) that varies depending on the CP (Cyclic Prefix) length.
- I PRB_RA is a minimum value of a PRB (Physical RB) index to which a PUSCH corresponding to PHICH is assigned.
- n DMRS is a cyclic shift (DMC) value of a DMRS (Demodulation Reference Signal) included in a UL grant that indicates a PUSCH corresponding to PHICH. Since I PRB_RA and n DMRS depend on UL grant and PUSCH assignment, it can be said that PHICH resources are implicitly signaled based on UL grant and PUSCH assignment.
- the determined PHICH resource is divided for each value of I PHICH .
- PHICH for PUSCH 7 subframes ago and PHICH for PUSCH 6 subframes ago are designed so that each PHICH resource does not compete.
- PHICH mapping depends on the cell ID (cell ID). Therefore, interference control with other cells is difficult in PHICH, and PHICH may interfere with PDCCH and / or CRS (Cell-specific Reference Signal) of other cells.
- all 3REGs constituting PHICH are arranged in OFDM symbol # 0 (not shown), and one is arranged in OFDM symbols # 0, # 1, and # 2 as shown in FIG. There is. Information indicating which PHICH is arranged is notified to the terminal by a notification signal.
- the number of OFDM symbols (1 to 3) occupied by PDCCH is determined based on the value of CFI (Control Format Indicator) notified by PCFICH (Physical Control Format Format Indicator Channel) allocated to OFDM symbol # 0.
- CFI Control Format Indicator
- PCFICH Physical Control Format Format Indicator Channel
- the terminal uses a part of resources in the resource area (excluding resources occupied by PCFICH, PHICH, and reference signal among resource areas for the number of OFDM symbols indicated by CFI from OFDM symbol # 0). In the following, blind detection is performed in some cases.
- TDD eIMTA enhanced for DL-UL Interference Management andationTraffic Adaptation
- dynamic TDD dynamic TDD
- flexible TDD changes to UL-DL configuration
- TDD eIMTA enhanced for DL-UL Interference Management andationTraffic Adaptation
- the purpose of TDD eIMTA is to provide services that meet users' needs by flexibly changing the UL / DL ratio, or to reduce power consumption at the base station by increasing the UL ratio during times of low traffic load. Can be mentioned.
- Method (1) is the least frequent UL-DL configuration change.
- the method (1) is suitable, for example, for the purpose of reducing power consumption at the base station by increasing the UL ratio in a low traffic load period (for example, late at night or early morning).
- Method (4) is the most frequent UL-DL configuration change.
- a small cell such as a pico cell
- the number of connected terminals is smaller than in a large cell such as a macro cell.
- the UL / DL traffic of the entire pico cell is determined by the amount of UL / DL traffic in a small number of terminals connected to the pico cell. For this reason, time fluctuation of UL / DL traffic is severe in the pico cell.
- the method (4) is suitable.
- the method (2) and the method (3) are located between the method (1) and the method (4) and are suitable when the frequency of change of the medium UL-DL configuration is moderate.
- 3GPP TS 36.211 V10.1.0 “Physical Channels and Modulation (Release 10),” March 2011 3GPP TS 36.212 V10.1.0, “Multiplexing and channel coding (Release 10),” March 2011 3GPP TS 36.213 V10.1.0, “Physical layer procedures (Release 10),” March 2011 R1-074811, “Semi-static Configuration of Non-adaptive and Adaptive HARQ in E-UTRA Downlink”
- TDD eIMTA using UL-DL Configuration different from UL-DLBConfiguration notified by SIB1 and terminal using UL-DL Configuration notified by SIB1 (hereinafter sometimes referred to as non-TDD eIMTA terminal or legacy terminal)
- a terminal hereinafter, sometimes referred to as a TDD eIMTA terminal
- PUSCH timing (timing related to uplink retransmission control) corresponding to PHICH is defined for each UL-DL Configuration.
- a coefficient (m i ) of the number of PHICH groups is defined in association with the PHICH reception timing at the terminal. Therefore, the legacy terminal using the UL-DL Configuration notified of the SIB1 and the TDD eIMTA terminal using the UL-DL Configuration different from the UL-DL Configuration notified of the SIB1, and the timing related to uplink retransmission control and PHICH It is conceivable that the coefficient of the number of groups is also different.
- FIG. 5 shows an example when the coefficient of the PHICH group number is different between the legacy terminal and the TDDTDeIMTA terminal.
- FIG. 5A shows an example in which Config # 0 is set in the legacy terminal and Config # 2 is set in the TDD eIMTA terminal. That is, the coefficient (m i ) of the number of PHICH groups corresponding to Config # 0 shown in FIG. 3A is defined for each subframe in the legacy terminal, and the TDD eIMTA terminal corresponds to Config # 2 shown in FIG. 3A. A coefficient (m i ) of the number of PHICH groups is defined for each subframe.
- SF subframes
- D downlink communication subframes
- S special subframes
- the coefficient of the number of PHICH groups in each subframe differs between the legacy terminal and the TDD eIMTA terminal.
- the TDD eIMTA terminal recognizes that the PHICH resource does not exist (coefficient 0), whereas the legacy terminal recognizes that the PHICH resource corresponding to the coefficient 2 of the number of PHICH groups exists.
- each terminal the resource area excluding resources occupied by PCFICH, PHICH, and reference signals among the resource areas for the number of OFDM symbols indicated by CFI from OFDM symbol # 0.
- blind detection of PDCCH is performed.
- the number of PHICH resources assumed by the base station do not match, the blind detection range of the PDCCH in the terminal It is different from the assumption. For this reason, the terminal cannot correctly receive PHICH and cannot correctly receive downlink control information (DCI) addressed to the terminal included in the PDCCH.
- DCI downlink control information
- the base station cannot correctly report downlink control information (DCI) using PDCCH to the legacy terminal and the TDD eIMTA terminal in one subframe. Therefore, in order to correctly notify DCI using PDCCH to the legacy terminal and the TDD eIMTA terminal, the base station divides each subframe as a subframe for the legacy terminal or a subframe for the TDD eIMTA terminal. Therefore, there is a problem that a large scheduling constraint is involved for DCI.
- DCI downlink control information
- FIG. 5B shows an example in which Config # 3 is set in the legacy terminal and Config # 0 is set in the TDD eIMTA terminal. Also in FIG. 5B, it can be seen that both terminals have the same problem as in FIG. 5A in subframes # 0, 1, 5, and 6 that are downlink communication subframes or special subframes.
- An object of the present invention is to provide a terminal device and a base station device that can suppress scheduling restrictions on downlink control information (DCI) for both terminals in the base station when terminals having different UL-DL configurations are coexisting. It is to provide a reception method and a transmission method.
- DCI downlink control information
- a terminal apparatus is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a terminal device capable of changing the setting to any one of the plurality of configuration patterns including a frame, a receiving unit that receives a signal transmitted from a base station device, and the first sub-pattern included in the configuration pattern
- the frame is associated with the number of resources to which a response signal for uplink data is allocated, and is allocated to the first resource identified based on the number of resources associated with the first subframe that has received the signal
- a demultiplexer that demultiplexes the response signal and downlink control information allocated to the second resource from the signal, and
- a timing at which both the first configuration pattern set in the terminal device and the second configuration pattern set in another terminal device that cannot change the configuration pattern are the first subframe. Then, a configuration is employed in which the number of resources associated with the first subframe of the second configuration pattern is used.
- the base station apparatus is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a generating unit that generates a response signal to uplink data transmitted from a terminal device in which any one of the plurality of configuration patterns including subframes is set, and the first subframe included in the configuration pattern Is associated with the number of resources to which a response signal for uplink data is allocated, and the response is sent to the first resource identified based on the number of resources associated with the first subframe in which the response signal is transmitted.
- An allocation unit that allocates a signal and allocates downlink control information to a second resource, and includes the response signal and the downlink control information.
- Transmitting means for transmitting a signal wherein the allocating unit sets the first configuration pattern set in the terminal device and the second configuration set in another terminal device that cannot change the configuration pattern.
- the allocating unit sets the first configuration pattern set in the terminal device and the second configuration set in another terminal device that cannot change the configuration pattern.
- a configuration is used in which the number of resources associated with the first subframe of the second configuration pattern is used for the terminal device.
- a reception method is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a reception method in a terminal apparatus that can be changed to any one of a plurality of the configuration patterns including a frame, wherein a signal transmitted from a base station apparatus is received and the first sub-pattern included in the configuration pattern is received
- the frame is associated with the number of resources to which a response signal for uplink data is allocated, and is allocated to the first resource identified based on the number of resources associated with the first subframe that has received the signal
- the response signal and downlink control information allocated to the second resource are separated from the signal and set in the terminal apparatus.
- the second configuration pattern The number of resources associated with the first subframe is used.
- a transmission method is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a response signal for uplink data transmitted from a terminal device in which any one of the plurality of configuration patterns including the frame is set, and the response to the first subframe included in the configuration pattern A resource number to which a signal is allocated is associated, the response signal is allocated to a first resource identified based on the resource number associated with the first subframe in which the response signal is transmitted, and a second resource Assign downlink control information to a resource, transmit a signal including the response signal and the downlink control information, and set in the terminal device At the timing when both the first configuration pattern and the second configuration pattern set in the other terminal device that cannot change the configuration pattern are the first subframe, the terminal device The number of resources associated with the first subframe of the second configuration pattern is used.
- DCI downlink control information
- FIG. 6 is a main configuration diagram of base station 100 according to the present embodiment.
- the PHICH generation unit 103 is a configuration pattern (UL-DL-Configuration) of subframes constituting one frame, and is a first subframe (downlink communication subframe or special) used for downlink communication.
- the number of resources (total number of PHICH groups) to which a response signal is allocated is associated with the first subframe included in the UL-DL configuration.
- the signal allocation unit 106 allocates the response signal to the first resource (PHICH resource) specified based on the number of resources associated with the first subframe in which the response signal is transmitted, and the second resource (PDCCH Resource) is assigned downlink control information (DCI).
- Radio transmission section 107 transmits a signal to which a response signal and downlink control information are assigned.
- the signal allocation unit 106 is configured to set the first configuration pattern set in the terminal (TDD eIMTA terminal) and the other terminal (non-TDD eIMTA terminal) that cannot change the setting of the UL-DL Configuration.
- the number of resources associated with the first subframe of the second configuration pattern is used for the terminal (TDD eIMTA terminal).
- FIG. 7 is a main configuration diagram of terminal 200 according to the present embodiment.
- Terminal 200 is a configuration pattern (UL-DL-Configuration) of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication. Is a terminal that can be set and changed to any one of a plurality of configuration patterns.
- the first subframe included in the UL-DL configuration is associated with the number of resources (the total number of PHICH groups) to which a response signal for uplink data is allocated.
- the radio reception unit 202 receives a signal transmitted from the base station 100.
- the signal separation unit 203 includes a response signal allocated to the first resource (PHICH resource) specified based on the number of resources associated with the first subframe that has received the signal, and the second resource (PDCCH).
- the downlink control information assigned to the resource is separated from the signal.
- the signal separation unit 203 is set to the first configuration pattern set in the terminal 200 (TDD eIMTA terminal) and the other terminal device (non-TDD eIMTA terminal) that cannot change the setting of the UL-DL Configuration.
- the timing when both of the second configuration patterns are the first subframe the number of resources associated with the first subframe of the second configuration pattern is used.
- FIG. 8 is a block diagram showing a configuration of base station 100 according to the embodiment of the present invention.
- the error determination unit 101 determines whether or not there is an error in the received data signal (uplink data) received from the error correction decoding unit 111 described later using CRC or the like. The determination result is output to the control information generation unit 102.
- the control information generation unit 102 determines a resource to which the data signal is allocated and generates a DL assignment that is allocation information. In addition, when there is a data signal to be allocated to the uplink, the control information generation unit 102 determines a resource to which the data signal is allocated and generates UL grant that is allocation information. Control information generation section 102 determines whether or not to retransmit the signal (that is, uplink data) to the terminal based on the determination result received from error determination section 101. The generated allocation information is output to signal allocation section 106 as information transmitted on PDCCH (or EPDCCH). The DL assignment is also output to the signal assignment unit 106 as control information for transmitting downlink data. The UL grant is output to the radio reception unit 109 in order to receive uplink data.
- control information generation unit 102 generates PHACK so as to generate an ACK based on the determination result received from the error determination unit 101 when it is not necessary to retransmit the terminal or when the signal is adaptively retransmitted.
- the generation unit 103 is instructed.
- the control information generation unit 102 instructs the PHICH generation unit 103 to generate a NACK when performing non-adaptive retransmission with respect to the terminal.
- the PHICH generation unit 103 generates an ACK / NACK signal (ACK or NACK) according to an instruction from the control information generation unit 102.
- the error correction coding unit 104 performs error correction coding on the transmission data signal (that is, downlink data signal), and outputs the encoded signal to the modulation unit 105.
- Modulation section 105 modulates the signal received from error correction coding section 104 and outputs the modulated signal to signal allocation section 106.
- the signal assignment unit 106 assigns the modulation signal received from the modulation unit 105 to the corresponding resource based on the DL assignment received from the control information generation unit 102. Also, the signal assignment unit 106 assigns DCI including the DL assignment and UL grant received from the control information generation unit 102 to the PDCCH resource region (PDCCH region) (or EPDCCH resource region (EPDCCH region)). Furthermore, when the ACK / NACK signal is output from the PHICH generation unit 103, the signal allocation unit 106 allocates the ACK / NACK signal to the PHICH resource region.
- PDCCH resource region PDCCH region
- EPDCCH region EPDCCH resource region
- the signal allocation unit 106 is a coefficient of the number of PHICH groups defined in the subframe (downlink communication subframe or special subframe) in which the ACK / NACK signal is transmitted (that is, associated with the subframe).
- An ACK / NACK signal is allocated to a PHICH resource specified based on the total number of PHICH groups), and DCI is allocated to at least a PDCCH resource other than the PHICH resource in a predetermined resource area (area determined by the above-described CFI).
- One of a plurality of UL-DL configurations (for example, Config # 0 to # 6) is set in the terminal that has transmitted uplink data for the ACK / NACK signal. Details of the allocation operation in the signal allocation unit 106 will be described later.
- a transmission signal is generated by assigning a transmission data signal, control information (eg, assignment information (DL assignment, UL grant), etc.) and a PHICH signal (ACK / NACK signal) to predetermined resources.
- the generated transmission signal is output to radio transmission section 107.
- the radio transmission unit 107 performs predetermined radio transmission processing such as up-conversion on the transmission signal received from the signal allocation unit 106 and transmits the signal via the antenna 108.
- the radio reception unit 109 receives a signal transmitted from the terminal via the antenna 108 and performs predetermined radio reception processing such as down-conversion. Radio receiving section 109 then separates the signal transmitted from the terminal based on UL grant received from control information generating section 102 and outputs the separated signal to demodulation section 110.
- Demodulation section 110 performs demodulation processing on the signal received from radio reception section 109 and outputs the obtained demodulated signal to error correction decoding section 111.
- the error correction decoding unit 111 decodes the demodulated signal received from the demodulating unit 110 to obtain a received data signal.
- the obtained received data signal is also output to error determination section 101.
- FIG. 9 is a block diagram showing a configuration of terminal 200 according to the present embodiment.
- a radio reception unit 202 receives a signal transmitted from the base station 100 via an antenna 201, performs predetermined radio reception processing such as down-conversion, and performs signal separation on the signal subjected to radio reception processing.
- the data is output to the unit 203.
- the signal separation unit 203 extracts a PHICH region signal (ACK / NACK signal) and a PDCCH region signal (control information) from the signal received from the wireless reception unit 202, and extracts the PHICH region signal and the PDCCH region. Are output to the PHICH receiving unit 206 and the control information receiving unit 207, respectively.
- the signal separation unit 203 is a coefficient of the number of PHICH groups defined in the subframe (downlink communication subframe or special subframe) received by the wireless reception unit 202 (that is, associated with the subframe).
- ACK / NACK signal assigned to the PHICH resource (number of resources and resource location) specified based on the total number of PHICH groups assigned) and at least a predetermined resource region (region determined by the CFI described above)
- Control information (DCI) assigned to PDCCH resources other than PHICH resources is separated from the received signal. Details of the separation operation in the signal separation unit 203 will be described later.
- the signal separation unit 203 extracts a signal (that is, downlink data signal) assigned to the data resource indicated by the DL assignment received from the control information receiving unit 207, which will be described later, from the received signal, and demodulates the extracted signal. To 204.
- Demodulation section 204 demodulates the signal received from signal separation section 203 and outputs the demodulated signal to error correction decoding section 205.
- the error correction decoding unit 205 decodes the demodulated signal received from the demodulating unit 204 and outputs the received data signal obtained.
- the PHICH reception unit 206 determines whether the signal in the PHICH region extracted by the signal separation unit 203 is ACK or NACK. The determination result is output to the control information receiving unit 207.
- the control information reception unit 207 extracts control information (for example, DL assignment or UL assignment) addressed to itself by performing blind decoding on the signal in the PDCCH region extracted by the signal separation unit 203.
- the control information receiving unit 207 outputs the extracted DL assignment to the signal separation unit 203 and outputs UL grant to the signal assignment unit 210.
- the control information reception unit 207 also functions as a retransmission control unit.
- a signal non-adaptive retransmission instruction signal
- a retransmission instruction signal is output to the signal allocation unit 210.
- the control information receiving unit 207 does not output a signal instructing allocation to the signal allocating unit 210.
- Error correction coding section 208 performs error correction coding on the transmission data signal (that is, uplink data), and outputs the encoded signal to modulation section 209.
- Modulation section 209 modulates the signal output from error correction coding section 208 and outputs the modulated signal to signal allocation section 210.
- the signal assigning unit 210 When the signal assigning unit 210 receives the UL grant from the control information receiving unit 207, the signal assigning unit 210 compares the UL DI grant (NDI of the current UL grant) with the previous UL grant NDI of the same retransmission process and determines the NDI. If there is a change, it is determined that new data has been assigned, and the modulation signal of the new data output from the modulation unit 209 is assigned to the data resource in accordance with UL grant. On the other hand, if there is no change in NDI, signal allocating section 210 determines that retransmission data has been allocated, and allocates a modulated signal of retransmission data output from modulating section 209 to a data resource in accordance with UL grant.
- the signal allocation unit 210 when the signal allocation unit 210 receives the retransmission instruction signal from the control information reception unit 207, the signal allocation unit 210 allocates the modulation signal of the retransmission data output from the modulation unit 209 to the data resource in accordance with the previous UL grant of the same retransmission process.
- the assigned signal is output to the wireless transmission unit 211 as a transmission signal.
- the radio transmission unit 211 performs predetermined radio transmission processing such as up-conversion on the transmission signal received from the signal allocation unit 210 and transmits the signal via the antenna 201.
- base station 100 and terminal 200 Details of operations of base station 100 and terminal 200 having the above-described configurations will be described.
- the same cell covered by base station 100 includes a TDD eIMTA terminal (terminal 200) whose UL-DL Configuration can be changed and a non-TDD eIMTA terminal (including a legacy terminal) whose UL-DL Configuration cannot be changed. Exists within.
- the UL-DL Configuration of the terminal 200 which is a TDD eIMTA terminal is a downlink communication subframe or a special subframe will be described in the following two cases.
- ⁇ Case 1> When the UL-DL Configuration of a non-TDD eIMTA terminal is a downlink communication subframe or special subframe ⁇ Case 2>: When UL-DL Configuration of non-TDD eIMTA terminal is an uplink communication subframe
- ⁇ Case 1> A method for determining the number of PHICH resources in the base station 100, a method for determining the total number of PHICH groups in the terminal 200 (TDD eIMTA terminal), and a PDCCH detection method will be described with reference to FIG.
- 10A and 10B correspond to the UL-DL configuration of each terminal in FIGS. 5A and 5B, respectively.
- the coefficient of the number of PHICH groups of subframes # 3, 4, 8, and 9 of the TDD eIMTA terminal is indicated as “x”, but the value of “x” is described later in ⁇ Case 2>. It may be determined using any one of the methods.
- the TDD eIMTA terminal (terminal 200) first connects using the UL-DL Configuration notified by SIB1 as the UL-DL Configuration when connecting to a cell that supports TDD eIMTA. Then, it is conceivable that the TDD eIMTA terminal changes to a different UL-DL Configuration based on an instruction from the base station 100 of the cell after cell connection. That is, the TDD eIMTA terminal uses a UL-DL Configuration for TDD eIMTA (that is, UL-DL Configuration set in the TDD eIMTA terminal and different from the UL-DL Configuration notified by SIB1).
- UL-DL Configuration notified by SIB1 that is, UL-DL Configuration set in non-TDD eIMTA terminal.
- SIB1 UL-DL Configuration set in non-TDD eIMTA terminal.
- non-TDD eIMTA terminals including legacy terminals can receive UL-DLSIConfiguration notified by SIB1, they do not need to receive UL-DL Configuration for TDD eIMTA or receive them in the first place. I can't.
- the base station 100 determines the number of PHICH groups based on the UL-DL configuration notified by the SIB1, regardless of the current UL-DL configuration of the terminal 200, with respect to the TDD eIMTA terminal (terminal 200). According to the coefficient, the number of PHICH resources and the PHICH resource position are secured. Moreover, the base station 100 sets a PDCCH region based on the secured PHICH region.
- terminal 200 determines the number of PHICH resources and the position of PHICH resources according to the coefficient of the number of PHICH groups based on UL-DL ⁇ Configuration notified by SIB1, regardless of the current UL-DL Configuration of the own device. Is detected, and PDCCH is detected.
- the base station 100 (E.g., signal allocation unit 106) and terminal 200 (e.g., signal separation unit 203) are connected to TDD eIMTA terminal in order to eliminate the difference in recognition of the total number of PHICH groups between TDDTDeIMTA terminal and non-TDD eIMTA terminal.
- the PHICH and PDCCH resource areas are specified using the coefficients of the number of PHICH groups defined in the UL-DL Configuration (UL-DL Configuration notified by SIB1) set in the non-TDD-eIMTA terminal.
- the base station 100 and the terminal 200 use the total number of PHICH groups (number of PHICH resources) associated with the timing of the UL-DL configuration set in the non-TDD-eIMTA terminal at the timing of case 1.
- base station 100 determines the number of PHICH groups for the TDD eIMTA terminal (terminal 200).
- base station 100 sets the same PDCCH region for TDD eIMTA terminals and non-TDD eIMTA terminals. Thereby, the blind detection range of PDCCH with respect to a TDD eIMTA terminal and a non-TDD eIMTA terminal becomes the same.
- terminal 200 uses the PHICH group number coefficient in subframes # 0, 1, 5, and 6 shown in FIG. 10A as the number of PHICH group numbers corresponding to Config # 2 set in its own device. It is assumed that the number is the same as the coefficient of the number of PHICH groups recognized by the legacy terminal (coefficient specified in UL-DL Configuration notified by SIB1), not the coefficient (2,1,2,1 in order). Thereby, in subframes # 0, 1, 5, and 6 shown in FIG. 10A, terminal 200 detects the PDCCH addressed to itself in the same PDCCH region (blind detection range) as that of the legacy terminal.
- base station 100 and terminal 200 use the PHICH group number coefficient of terminal 200 as the PHICH group number coefficient recognized by the legacy terminal.
- the same number in order, 1, 0, 0, 0 is set, and allocation processing and separation processing (and detection processing) in PHICH and PDCCH are performed.
- terminal 200 uses the resources for PCFICH among the resource regions (predetermined resource regions) for the number of OFDM symbols indicated by CFI from OFDM symbol # 0, the reference PDCCH blind detection is performed in a part of a resource area excluding signal resources and PHICH resources secured by a method described later.
- the terminal 200 detects PDCCH in the subframe.
- a PHICH resource (number of PHICH resources and corresponding PHICH resource position) specified based on the coefficient 1 of the number of PHICH groups defined in the UL-DL Configuration notified of SIB1 is reserved for PHICH.
- terminal 200 performs PHICH detection only on one uplink data (referred to as first uplink data) out of two uplink data corresponding to PHICH received in the subframe, and on the other hand The PHICH detection is not performed on the uplink data (referred to as second uplink data). Therefore, as the uplink data retransmission method for terminal 200, both adaptive retransmission and non-adaptive retransmission can be used for the first uplink data, and adaptive retransmission for the second uplink data. Only available.
- the terminal 200 detects the PDCCH in the subframe by specifying a PHICH resource (number of PHICH resources and the corresponding number) specified based on the PHICH group number coefficient 1 specified in the UL-DL Configuration notified by the SIB1. (PHICH resource position) to be reserved for PHICH for the first uplink data. Furthermore, terminal 200 determines a PHICH resource for the second uplink data based on the PHICH resource for the first uplink data.
- the terminal 200 sets the PHICH resource for the second uplink data as the parameter It is determined using the set (I PRB_RA +1, n DMRS ).
- I PRB_RA indicates the head PRB of uplink data allocation. Therefore, even I PRB_RA +1 indicates a PRB adjacent to PRB corresponding to I PRB_RA also likely the uplink data occupies.
- base station 100 assigns uplink data with a PRB corresponding to I PRB_RA +1 as a leading PRB to other terminals other than terminal 200. Therefore, even if the base station 100 uses the PHICH resource for I PRB_RA +1 in addition to the PHICH resource for I PRB_RA for the terminal 200, it can suppress the possibility that scheduling for other terminals may be restricted. it can.
- ⁇ Case 2> A method for determining the number of PHICH resources in base station 100, a method for determining the total number of PHICH groups in terminal 200 (TDD eIMTA terminal), and a PDCCH detection method will be described with reference to FIGS.
- the TDD-eIMTA terminal uses the coefficient specified by the UL-DL Configuration notified by the SIB1, which is used by the non-TDD-eIMTA terminal, that is, It is not necessary to follow the total number of PHICH groups. Focusing on this point, methods 1 to 4 for setting the total number of PHICH groups (coefficient of the number of PHICH groups) for the TDD eIMTA terminal will be described below.
- Method 1 the total number of PHICH groups is determined based on the UL-DL Configuration for TDD eIMTA. That is, the base station 100 and the terminal 200 use the coefficient of the number of PHICH groups defined at the timing of the UL-DL Configuration set in the terminal 200 at the timing corresponding to case 2. In other words, the base station 100 and the terminal 200 use the total number of PHICH groups associated with the timing of the UL-DL Configuration set in the terminal 200 at the timing corresponding to case 2.
- each terminal in FIG. 11A corresponds to the UL-DL configuration of each terminal in FIG. 10A.
- the timing corresponding to Case 2 is subframe # 3, 4, 8,9.
- the base station 100 When the base station 100 performs downlink communication at the timing corresponding to case 2, the base station 100 transmits the current UL-DL Configuration of the terminal 200 (Config # 2 in FIG. 11A) to the terminal 200 (TDD eIMTA terminal). ) To secure PHICH resources (number of PHICH resources and PHICH resource position). That is, as shown in FIG. 11B, base station 100 uses the PHICH group coefficients (m i ) of 1, 0, 1, and 0 for terminal 200 in subframes # 3, 4, 8, and 9, respectively. The PHICH resource specified based on this is reserved. Moreover, the base station 100 sets a PDCCH resource based on the secured PHICH resource.
- the terminal 200 is based on the coefficient of the number of PHICH groups defined in the UL-DL Configuration (Config # 2 in FIG. 11A) for TDD eIMTA currently set in the own device,
- the coefficient of the number of PHICH groups is determined. That is, as shown in FIG. 11B, terminal 200 determines PHICH resources specified based on the PHICH group coefficients (m i ) of 1, 0, 1, and 0 in subframes # 3, 4, 8, and 9, respectively.
- PHICH and PDCCH are detected assuming that (the number of PHICH resources and the corresponding PHICH resource position) are secured.
- the base station 100 applies the non-adaptive retransmission by using the optimal total number of PHICH groups for the terminal 200 using the UL-DL Configuration for TDD eIMTA, that is, securing PHICH resources without excess or deficiency. can do.
- the terminal 200 is defined by the UL-DL configuration for TDD eIMTA in order to detect PDCCH in the subframe.
- a PHICH resource (PHICH resource number and corresponding PHICH resource position) specified based on the coefficient (1 or 2) of the number of PHICH groups is reserved for PHICH.
- the terminal 200 performs PHICH detection. Therefore, as a retransmission method of uplink data for terminal 200, both adaptive retransmission and non-adaptive retransmission can be used.
- Method 2 the total number of PHICH groups is determined based on the maximum value for each subframe in all UL-DL Configurations (for example, Config # 0 to Config # 6). That is, the base station 100 and the terminal 200 use the maximum value among the coefficients of the number of PHICH groups respectively defined at the timings of a plurality of UL-DL configurations at the timing corresponding to case 2. In other words, the base station 100 and the terminal 200 use the maximum value among the total number of PHICH groups respectively associated with a plurality of UL-DL Configurations at the timing corresponding to case 2.
- Method 2 it is assumed that there are two TDDTAeIMTA terminals in addition to the non-TDD eIMTA terminal (legacy terminal) using the UL-DL configuration notified to SIB1. Further, it is assumed that the two TDD eIMTA terminals have different UL-DL Configurations that are different from each other and different from the UL-DL Configuration notified by the SIB1.
- FIG. 12A there are a TDD ⁇ eIMTA terminal 1 set with Config # 2 and a TDD eIMTA terminal 2 set with Config # 1 in addition to the legacy terminal set with Config # 0.
- FIG. 12 at a timing (subframes # 3, 4, 8, and 9) when the TDD eIMTA terminal is a downlink communication subframe or a special subframe and the non-TDD eIMTA terminal (legacy terminal) is an uplink communication subframe.
- the coefficient of the number of PHICH groups is set based on Method 1 for each TDDTAeIMTA terminal.
- the coefficients of the number of PHICH groups in subframes # 3, 4, 8, and 9 are 1, 0, 1, and 0 as shown in FIG. 12B. Also, in the TDD eIMTA terminal 2, the coefficient of the number of PHICH groups in subframes # 4 and 9 is 1, 1 as shown in FIG. 12B.
- TDD ⁇ eIMTA terminal 1 and TDD eIMTA terminal 2 attention is paid to the coefficient of the number of PHICH groups in subframes # 4 and 9 which are downlink communication subframes or special subframes. It can be seen that the coefficient of the number of PHICH groups in each subframe differs between TDD eIMTA terminal 1 and TDD eIMTA terminal 2. Therefore, as in the case described with reference to FIG. 5, the base station 100 cannot simultaneously schedule to both the TDD eIMTA terminal 1 and the TDD eIMTA terminal 2 in the subframes # 4 and 9, so that there is a scheduling constraint on DCI. .
- Case I System that is expected to operate using 3 or more different UL-DL Configurations in one cell
- Case II Change the UL-DL Configuration settings for multiple TDD eIMTA terminals simultaneously In some cases, among the multiple TDD eIMTA terminals, due to reception failure at some TDD eIMTA terminals, the terminal cannot receive the UL-DL Configuration setting change instruction.
- the TDD eIMTA terminal can also receive the UL-DL Configuration notified by the SIB1 in addition to receiving the UL-DL Configuration for TDD eIMTA for its own device.
- each TDD ⁇ eIMTA terminal cannot receive a TDD eIMTA UL-DL Configuration for other TDD eIMTA terminals.
- the non-TDD eIMTA terminal (legacy terminal) is an uplink communication subframe and all UL-DLULConfigurations other than UL-DL-Configuration notified by SIB1 are included.
- the base station 100 performs downlink communication (subframe # in FIG. 13A) at a timing (subframe # 3, 4, 7, 8, 9 in FIG. 13A) that is at least one downlink communication subframe or special subframe. 3, 4, 8, and 9)
- the base station 100 determines, for these TDDICeIMTA terminals, the coefficients of the number of PHICH groups defined by all UL-DL Configurations (Config # 0 to 6) in the subframe.
- PHICH resources As a coefficient of the number of PHICH groups in the subframe, PHICH resources (PHICH resource count and PHICH resource To ensure the over scan position). Also, in terminal 200 (TDD eIMTA terminal), UL-DL Configuration notified by SIB1 is an uplink communication subframe, and UL-DL Configuration set in the terminal is a downlink communication subframe or a special subframe. At the timing, the maximum number of the PHICH group number coefficients defined by all UL-DL Configurations (Config # 0 to 6) in the subframe is used as the PHICH group number coefficient in the subframe. And the PHICH resource position corresponding to it is specified, and PDCCH is detected.
- the coefficient of the number of PHICH groups in subframe # 3 is 1 in Config # 2 and 0 in Config # 5, so the maximum value is 1.
- the coefficient of the number of PHICH groups in subframe # 8 is always 1 in Config # 2 to Config 5, so the maximum value is 1.
- the coefficient of the number of PHICH groups in subframe # 7 is always 0 in Config # 3 to Config5, and thus the maximum value is 0. The same applies to the other subframes # 4 and # 9.
- the base station 100 can resolve a difference in recognition of the total number of PHICH groups among a plurality of TDD eIMTAs and determine a PHICH resource. Therefore, PDCCH scheduling for a plurality of TDD eIMTA terminals can be performed in the same subframe. In addition, each TDD eIMTA terminal can detect the PDCCH in the same subframe. Moreover, PHICH resources can be secured for all TDD eIMTA terminals without a shortage.
- the base station 100 supports a plurality of TDD eIMTA terminals.
- a set of UL-DL configuration candidates that can be changed by TDD eIMTA (for example, Config # 0 to 2 in Fig. 13A) is notified in advance, or UL-DL Configuration of SIB1 notification is sent by TDD eIMTA. If a candidate set of UL-DL Configuration that can be changed is defined in advance (for example, in Fig.
- Config # 0 to 2 can be used in TDD eIMTA for Config # 0 in SIB1 notification).
- the “maximum value of the coefficient of the number of PHICH groups in all UL-DL configurations (Config # 0 to 2) that can be changed” may be used for the eIMTA terminal.
- the base station 100 uses the total PHICH group number more suitable for each TDDTAeIMTA terminal. Therefore, resource utilization efficiency can be improved.
- the total number of PHICH groups is determined based on the minimum value for each subframe in all UL-DL Configurations. That is, the base station 100 and the terminal 200 use the minimum value among the coefficients of the number of PHICH groups respectively defined at the timing of the plurality of UL-DL Configurations at the timing corresponding to case 2. In other words, the base station 100 and the terminal 200 use the minimum value among the total number of PHICH groups respectively associated with a plurality of UL-DL Configurations at the timing corresponding to case 2.
- Method 3 is the same as the premise of Method 2 (for example, FIG. 12).
- the non-TDD eIMTA terminal (legacy terminal) is an uplink communication subframe, and in all UL-DL Configurations other than UL-DL Configuration notified by SIB1 Timing when at least one of the TDD eIMTA terminals for which different TDDDeIMTA UL-DL Configurations are set is a downlink communication subframe or a special subframe (in FIG. 14A, subframes # 3, 4, 7, 8, 9). ), When the base station 100 performs downlink communication (subframes # 3, 4, 8, and 9 in FIG. 14A), the base station 100 transmits all of the subframes to the TDD eIMTA terminal.
- the minimum value among the coefficients for the number of PHICH groups specified by UL-DL Configuration is the PHICH group in the subframe.
- a PHICH resource (number of PHICH resources and PHICH resource position) is secured as a coefficient of the number of loops.
- UL-DL Configuration notified by SIB1 is an uplink communication subframe
- UL-DL Configuration set in the terminal is a downlink communication subframe or a special subframe.
- the number of PHICH resources is determined by using the minimum value among the coefficients of the number of PHICH groups defined by all UL-DL Configurations (Config # 0 to 6) in the subframe as the coefficient of the number of PHICH groups in the subframe. And the PHICH resource position corresponding to it is specified, and PDCCH is detected.
- the coefficient of the number of PHICH groups in subframe # 3 is 1 in Config # 2 and 0 in Config # 5, so the minimum value is 0.
- the coefficient of the number of PHICH groups in subframe # 8 is always 1 in Config # 2 to Config 5, so the minimum value is 1.
- the coefficient of the number of PHICH groups in subframe # 7 is always 0 in Config # 3 to Config5, so the minimum value is 0. The same applies to the other subframes # 4 and # 9.
- the method 3 can be applied to the above two cases I and II.
- the base station 100 can eliminate the discrepancy in the recognition of the total number of PHICH groups among a plurality of TDD eIMTAs and determine PHICH resources. Therefore, base station 100 can perform PDCCH scheduling for a plurality of TDD eIMTA terminals in the same subframe, and each TDD eIMTA terminal can detect PDCCH in the same subframe. In addition, it is possible to prevent excessive PHICH resources from being reserved for the TDD eIMTA terminal.
- the “minimum value of the coefficient of the number of PHICH groups in all UL-DL configurations (Config # 0 to 6)” is used.
- the base station 100 applies to a plurality of TDD eIMTA terminals.
- a set of UL-DL configuration candidates that can be changed by TDD eIMTA (for example, Config # 0 to 2 in Fig. 14A) is notified in advance, or UL-DL Configuration of SIB1 notification is sent by TDD eIMTA.
- a set of UL-DL Configuration candidates that can be changed is defined in advance (for example, in Fig.
- Config # 0 to 2 can be used in TDD eIMTA for Config # 0 in SIB1 notification).
- the “minimum value of the coefficient of the number of PHICH groups in all UL-DL configurations (Config # 0 to 2) that can be changed” may be used for the eIMTA terminal.
- the coefficients of the number of PHICH groups in subframes # 3, 4, 8, and 9 are 1, 0, 1, and 0, respectively.
- Method 4 the total number of PHICH groups is always 0. That is, in the base station 100 and the terminal 200, the separation unit sets the coefficient of the number of PHICH groups to zero at the timing corresponding to case 2. In other words, the base station 100 and the terminal 200 set the total number of PHICH groups to zero at the timing corresponding to case 2.
- Method 4 there is a non-TDDIMeIMTA terminal (legacy terminal) using UL-DL ⁇ Configuration notified by SIB1 in cell 2 adjacent to cell 1 to which the TDD eIMTA terminal is connected.
- a non-TDDIMeIMTA terminal legacy terminal
- SIB1 UL-DL ⁇ Configuration notified by SIB1 in cell 2 adjacent to cell 1 to which the TDD eIMTA terminal is connected.
- the TDDIMeIMTA terminal and the non-TDD eIMTA terminal are close to each other, but the cells to which each terminal is connected are different from each other.
- the legacy terminal connected to the cell 2 performs uplink communication based on the UL-DL configuration of the SIB1 notification.
- the TDD eIMTA terminal connected to the cell 1 performs downlink communication based on the UL-DL Configuration for TDD eIMTA.
- the legacy terminal gives a large inter-terminal interference (inter-UE interference) to the TDD eIMTA terminal.
- FIG. 16 shows a case where the inter-UE interference shown in FIG. 15 occurs in a time series of one frame.
- FIG. 16 there is a legacy terminal 2 connected to the cell 1 in addition to the TDD ⁇ eIMTA terminal connected to the cell 1 and the legacy terminal 1 connected to the cell 2.
- FIG. 16 it is assumed that UL-DL Configuration of SIB1 notification in cell 1 and cell 2 is the same (Config # 0).
- the timing is an uplink communication subframe and the TDD eIMTA terminal is a downlink communication subframe or a special subframe (in FIG. 16). Focus on subframes # 3, 4, 8, 9).
- the legacy terminal 2 connected to the cell 1 when the subframe is used for downlink communication, the legacy terminal 2 connected to the cell 1 is operated so as not to perform uplink communication.
- the legacy terminal connected to the cell 2 1 may perform uplink communication.
- the TDD eIMTA terminal connected to the cell 1 receives a large inter-UE interference from the legacy terminal 1 connected to the cell 2.
- Method 4 when a non-TDD eIMTA terminal (legacy terminal) is an uplink communication subframe and the TDD eIMTA terminal (terminal 200) is a downlink communication subframe or a special subframe, Station 100 does not allocate PHICH to terminal 200, and terminal 200 does not perform PHICH detection. That is, since PHICH detection is not performed in the subframe, the base station 100 and the terminal 200 set the coefficient of the number of PHICH groups for the terminal 200 to 0 (the total number of PHICH groups is 0) as illustrated in FIG. In this case, only adaptive retransmission can be used as the uplink data retransmission method for terminal 200.
- the UL-DL Configuration notification method for TDD eIMTA set in the TDD eIMTA terminal (terminal 200) is an RRC (higher layer) signaling-based notification method, MAC (Media Access) Control layer) signaling-based notification method and L1 (Physical Layer) signaling-based notification method may be used.
- RRC higher layer
- MAC Media Access
- L1 Physical Layer
- the TDD eIMTA set in the TDD eIMTA terminal is different from the UL-DL Configuration notified by the SIB1 used by the non-TDD eIMTA terminal (legacy terminal), the TDD eIMTA set in the TDD eIMTA terminal As a UL-DL Configuration notification method for use, an SI (System Information) signaling-based notification method may be used.
- SI System Information
- “UL-DL configuration for TDDTeIMTA set in TDD eIMTA terminal” is described.
- “the UL-DL configuration for TDD eIMTA set in the TDD eIMTA terminal” and “timing related to uplink control that defines the coefficient of the number of PHICH groups (that is, PHICH for uplink data (PUSCH)) (Reception timing) is based on the assumption that the UL-DL Configuration that refers to the timing is the same.
- TDD-inter-band-CA Carrier-Aggreggation
- UL-DL configuration that indicates the subframe configuration may be different from the UL-DL configuration that refers to timing related to uplink control (hereinafter sometimes referred to as timing reference UL-DL configuration).
- the “UL-DL Configuration for TDD eIMTA set in the TDD eIMTA terminal” in the above embodiment is the “timing reference” referred to by the TDD eIMTA terminal. It is different from “UL-DL Configuration”. Therefore, in the above embodiment, the “UL-DL Configuration for TDD eIMTA set in the TDD eIMTA terminal” is regarded as “UL-DL Configuration related to uplink control referenced by the TDD eIMTA terminal”. Good.
- each antenna is described.
- the present invention can be similarly applied to an antenna port.
- An antenna port refers to a logical antenna composed of one or more physical antennas. That is, the antenna port does not necessarily indicate one physical antenna, but may indicate an array antenna composed of a plurality of antennas.
- the antenna port may be defined as a minimum unit for multiplying the weight of a precoding vector (Precoding vector).
- each functional block used in the description of the above embodiment 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 may be realized by a dedicated circuit or a general-purpose processor.
- 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 is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication. Including a receiving unit that receives a signal transmitted from a base station device, and the first subframe included in the configuration pattern. Is associated with the number of resources to which a response signal for uplink data is allocated, and is allocated to the first resource identified based on the number of resources associated with the first subframe that has received the signal A separation unit that separates the response signal and downlink control information allocated to the second resource from the signal, and the separation Is the timing when both the first configuration pattern set in the terminal device and the second configuration pattern set in another terminal device that cannot change the configuration pattern are the first subframe. A configuration is employed in which the number of resources associated with the first subframe of the second configuration pattern is used.
- the separation unit is the first subframe in the first configuration pattern and the second subframe in the second configuration pattern.
- the number of resources associated with the first subframe of the first configuration pattern is used.
- the separation unit is the first subframe in the first configuration pattern and the second subframe in the second configuration pattern.
- the maximum value among the resource numbers respectively associated with the first subframes of the plurality of configuration patterns is used.
- the separation unit is the first subframe in the first configuration pattern and the second subframe in the second configuration pattern.
- a minimum value among the resource numbers respectively associated with the first subframes of the plurality of configuration patterns is used.
- the separation unit is the first subframe in the first configuration pattern and the second subframe in the second configuration pattern.
- the number of resources is set to zero.
- the base station apparatus is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a generating unit that generates a response signal to uplink data transmitted from a terminal device in which any one of the plurality of configuration patterns including a frame is set, and the first subframe included in the configuration pattern
- a resource number to which a response signal for uplink data is allocated is associated with the first resource identified based on the resource number associated with the first subframe in which the response signal is transmitted
- Allocating unit for allocating downlink control information to the second resource, and including the response signal and the downlink control information Transmitting means for transmitting a signal, wherein the allocating unit sets the first configuration pattern set in the terminal device and the second configuration set in another terminal device in which the configuration pattern cannot be changed.
- the number of resources associated with the first subframe of the second configuration pattern is used for the terminal device.
- the reception method is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- Receiving a signal transmitted from a base station apparatus, and receiving the signal transmitted from the base station apparatus, and the first subframe included in the configuration pattern Is associated with the number of resources to which a response signal for uplink data is allocated, and is allocated to the first resource identified based on the number of resources associated with the first subframe that has received the signal
- the response signal and the downlink control information allocated to the second resource are separated from the signal and set in the terminal device At the timing when both the first configuration pattern and the second configuration pattern set in the other terminal device that cannot change the configuration pattern are the first subframe, the second configuration pattern The number of resources associated with the first subframe is used.
- the transmission method is a configuration pattern of subframes constituting one frame, and includes a first subframe used for downlink communication and a second subframe used for uplink communication.
- a response signal for uplink data transmitted from a terminal device in which any one of the plurality of configuration patterns is set, and the response signal is included in the first subframe included in the configuration pattern Is assigned to the first resource identified based on the number of resources associated with the first subframe in which the response signal is transmitted, and the second resource Assigns downlink control information to the terminal device, transmits a signal including the response signal and the downlink control information, and sets the terminal device
- the present invention is useful for mobile communication systems and the like.
- Base station 100 Base station 200 Terminal 101 Error determination part 102 Control information generation part 103 PHICH generation part 104,208 Error correction encoding part 105,209 Modulation part 106,210 Signal allocation part 107,211 Radio transmission part 108,201 Antenna 109,202 Radio reception unit 110, 204 Demodulation unit 111, 205 Error correction decoding unit 203 Signal separation unit 206 PHICH reception unit 207 Control information reception unit
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Abstract
Description
図8は、本発明の実施の形態に係る基地局100の構成を示すブロック図である。
図9は、本実施の形態に係る端末200の構成を示すブロック図である。
以上の構成を有する基地局100及び端末200の動作の詳細について説明する。ここでは、UL-DL Configurationを設定変更可能なTDD eIMTA端末(端末200)と、UL-DL Configurationを設定変更できない非TDD eIMTA端末(レガシ端末を含む)とが、基地局100がカバーする同一セル内に存在する。また、TDD eIMTA端末である端末200のUL-DL Configurationが下り通信サブフレームまたはスペシャルサブフレームである場合について、以下の2通りのケースに分けて説明する。
<ケース1>:
非TDD eIMTA端末のUL-DL Configurationが下り通信サブフレーム又はスペシャルサブフレームである場合
<ケース2>:
非TDD eIMTA端末のUL-DL Configurationが上り通信サブフレームである場合
基地局100におけるPHICHリソース数の決定方法、及び、端末200(TDD eIMTA端末)における総PHICHグループ数の決定方法、PDCCH検出方法を、図10を援用して説明する。
これにより、ケース1のタイミングでは、TDD eIMTA端末と非TDD eIMTA端末との間の総PHICHグループ数の認識のずれが解消され、かつ、各端末と基地局100とがそれぞれ想定するPHICHリソース数は一致する。よって、基地局100は、同一サブフレームにおいて、TDD eIMTA端末と非TDD eIMTA端末とに対してPDCCHを用いたDCIを正しく通知することができる。また、TDD eIMTA端末(端末200)及び非TDD eIMTA端末は、同一サブフレームにおいて自機宛のPDCCHを検出することができる。このように、基地局100では、TDD eIMTA端末と非TDD eIMTA端末とで使用するサブフレームを分ける必要がないので、DCIについてのスケジューリングの制約は伴わない。
次に、ケース1において、端末200(TDD eIMTA端末)に設定されたTDD eIMTA用のUL-DL configurationに対するPHICHグループ数の係数と、レガシ端末(非TDD eIMTA端末)に対してSIB1通知されたUL-DL configurationに対するPHICHグループ数の係数との各組み合せ(a)~(d)における、端末200のPDCCH検出およびPHICH検出に関する動作について詳述する。
端末200は、当該サブフレームにおいて、PDCCH検出のために、SIB1通知されたUL-DL Configurationで規定されるPHICHグループ数の係数(1または2)に基づいて特定されるPHICHリソース(PHICHリソース数及び対応するPHICHリソース位置)をPHICH用に確保する。ただし、端末200は、自機宛のPHICHが存在しないため、PHICH検出を行う必要がない。
端末200は、当該サブフレームにおいて、PDCCH検出のために、SIB1通知されたUL-DL Configurationで規定されるPHICHグループ数の係数2に基づいて特定されるPHICHリソース(PHICHリソース数及びそれに対応するPHICHリソース位置)をPHICH用に確保する。さらに、端末200はPHICH検出を行う。したがって、端末200に対する上り回線データの再送方法としては、アダプティブ再送及びノンアダプティブ再送の両方が利用可能である。
端末200は、当該サブフレームにおいて、PDCCH検出のためにPHICHリソースを確保しない。さらに、端末200はPHICH検出を行わない。したがって、端末200に対する上り回線データの再送方法としては、アダプティブ再送のみが利用可能である。
端末200は、当該サブフレームにおいて、PDCCH検出のために、SIB1通知されたUL-DL Configurationで規定されるPHICHグループ数の係数1に基づいて特定されるPHICHリソース(PHICHリソース数及びそれに対応するPHICHリソース位置)をPHICH用に確保する。さらに、端末200は、当該サブフレームにおいて受信されるPHICHに対応する2つの上り回線データのうち、一方の上り回線データ(第1の上り回線データとする)に対してのみPHICH検出を行い、他方の上り回線データ(第2の上り回線データとする)に対してはPHICH検出を行わない。したがって、端末200に対する上り回線データの再送方法としては、第1の上り回線データに対してはアダプティブ再送及びノンアダプティブ再送の両方が利用可能であり、第2の上り回線データに対してはアダプティブ再送のみが利用可能である。
基地局100におけるPHICHリソース数の決定方法、及び、端末200(TDD eIMTA端末)における総PHICHグループ数の決定方法、PDCCH検出方法を、図11~図17を援用して説明する。
方法1では、総PHICHグループ数は、TDD eIMTA用のUL-DL Configurationに基づいて決定される。つまり、基地局100及び端末200は、ケース2に相当するタイミングにおいては、端末200に設定されたUL-DL Configurationの当該タイミングに規定された、PHICHグループ数の係数を用いる。換言すると、基地局100及び端末200は、ケース2に相当するタイミングにおいては、端末200に設定されたUL-DL Configurationの当該タイミングに関連付けられた総PHICHグループ数を用いる。
これにより、基地局100は、TDD eIMTA用のUL-DL Configurationを用いる端末200に対して最適な総PHICHグループ数を用いて、すなわち、PHICHリソースを過不足無く確保して、ノンアダプティブ再送を適用することができる。
次に、端末200におけるPDCCH検出およびPHICH検出に関する動作について詳述する。
端末200は、当該サブフレームにおいて、PDCCH検出のためにPHICHリソースを確保しない。さらに、端末200は、自端末宛のPHICHが存在しないため、PHICH検出を行う必要がない。
端末200は、当該サブフレームにおいて、PDCCH検出のために、TDD eIMTA用のUL-DL configurationで規定されるPHICHグループ数の係数(1又は2)に基づいて特定されるPHICHリソース(PHICHリソース数及びそれに対応するPHICHリソース位置)をPHICH用に確保する。さらに、端末200は、PHICH検出を行う。したがって、端末200に対する上り回線データの再送方法としては、アダプティブ再送及びノンアダプティブ再送の両方が利用可能である。
方法2では、総PHICHグループ数は、全UL-DL Configuration(例えば、Config#0~Config#6)におけるサブフレーム毎の最大値に基づいて決定される。つまり、基地局100及び端末200は、ケース2に相当するタイミングにおいては、複数のUL-DL Configurationの当該タイミングにそれぞれ規定された、PHICHグループ数の係数の中の最大値を用いる。換言すると、基地局100及び端末200は、ケース2に相当するタイミングにおいては、複数のUL-DL Configurationにそれぞれ関連付けられた総PHICHグループ数の中の最大値を用いる。
ケースI:1つのセル内で、3つ以上の異なるUL-DL Configurationを用いて運用することが想定されるシステム
ケースII:複数のTDD eIMTA端末に対して同時にUL-DL Configurationの設定変更をする場合において、複数のTDD eIMTA端末のうち、一部のTDD eIMTA端末での受信失敗により、当該端末がUL-DL Configurationの設定変更指示を受信できない場合
これにより、基地局100は、複数のTDD eIMTA間の総PHICHグループ数の認識のずれを解消してPHICHリソースを決定することができるので、同一サブフレームにおいて複数のTDD eIMTA端末に対するPDCCHのスケジューリングが可能となり、かつ、各TDD eIMTA端末は、同一サブフレームでPDCCHを検出することができる。また、全てのTDD eIMTA端末に対してPHICHリソースを不足なく確保することができる。
次に、端末200におけるPDCCH検出およびPHICH検出に関する動作について詳述する。
端末200は、当該サブフレームにおいて、PDCCH検出のために、PHICHグループ数の係数1(当該サブフレームにおける最大値)に基づいて特定されるPHICHリソース(PHICHリソース数及びそれに対応するPHICHリソース位置)をPHICH用に確保する。ただし、端末200は、自端末宛のPHICHが存在しないため、PHICH検出を行う必要がない。
端末200は、当該サブフレームにおいて、PDCCH検出のために、PHICHグループ数の係数1(当該サブフレームにおける最大値)に基づいて特定されるPHICHリソース(PHICHリソース数及びそれに対応するPHICHリソース位置)をPHICH用に確保する。さらに、端末200はPHICH検出を行う。したがって、端末200に対する上り回線データの再送方法としては、アダプティブ再送及びノンアダプティブ再送の両方が利用可能である。
総PHICHグループ数は、全UL-DL Configurationにおけるサブフレーム毎の最小値に基づいて決定される。つまり、基地局100及び端末200は、ケース2に相当するタイミングにおいては、複数のUL-DL Configurationの当該タイミングにそれぞれ規定された、PHICHグループ数の係数の中の最小値を用いる。換言すると、基地局100及び端末200は、ケース2に相当するタイミングにおいては、複数のUL-DL Configurationにそれぞれ関連付けられた総PHICHグループ数の中の最小値を用いる。
これにより、方法2と同様、基地局100は、複数のTDD eIMTA間の総PHICHグループ数の認識のずれを解消してPHICHリソースを決定することができる。よって、基地局100は、同一サブフレームにおいて複数のTDD eIMTA端末に対するPDCCHのスケジューリングが可能となり、かつ、各TDD eIMTA端末は、同一サブフレームでPDCCHを検出することができる。また、TDD eIMTA端末に対してPHICHリソースを過剰に確保することを防ぐことができる。
方法4では、総PHICHグループ数は常に0とする。つまり、基地局100及び端末200は、前記分離部は、ケース2に相当するタイミングにおいては、PHICHグループ数の係数をゼロとする。換言すると、基地局100及び端末200は、ケース2に相当するタイミングにおいては、総PHICHグループ数をゼロとする。
これにより、端末200(TDD eIMTA端末)に対して、干渉に対する耐性がより強いPDCCHのみに基づく再送(アダプティブ再送)のみが行われるため、上述したUE間干渉の発生時でも信頼度の高い上り通信再送制御を行うことができる。さらに、端末200に対して不要なPHICHリソースを確保する必要がなくなるため、リソースの利用効率を改善することができる。
(1)なお、上記実施の形態において、TDD eIMTA端末(端末200)に設定されるTDD eIMTA用のUL-DL Configurationの通知方法は、RRC(higher layer)シグナリングベースの通知方法、MAC(Media Access Control layer)シグナリングベースの通知方法、及び、L1(Physical Layer)シグナリングベースのいずれの通知方法をとってもよい。TDD eIMTA端末に設定されるTDD eIMTA用のUL-DL Configurationが、非TDD eIMTA端末(レガシ端末)が用いるSIB1通知されたUL-DL Configurationとは異なる場合は、TDD eIMTA端末に設定されるTDD eIMTA用のUL-DL Configurationの通知方法としては、SI(System Information)シグナリングベースの通知方法をとってもよい。
200 端末
101 誤り判定部
102 制御情報生成部
103 PHICH生成部
104,208 誤り訂正符号化部
105,209 変調部
106,210 信号割当部
107,211 無線送信部
108,201 アンテナ
109,202 無線受信部
110,204 復調部
111,205 誤り訂正復号部
203 信号分離部
206 PHICH受信部
207 制御情報受信部
Claims (8)
- 1フレームを構成するサブフレームの構成パターンであって、下り回線の通信に用いられる第1のサブフレームと、上り回線の通信に用いられる第2のサブフレームとを含む複数の前記構成パターンのいずれかに設定変更可能である端末装置であって、
基地局装置から送信された信号を受信する受信部と、
前記構成パターンに含まれる前記第1のサブフレームには、上り回線データに対する応答信号を割り当てるリソース数が関連付けられ、前記信号を受信した前記第1のサブフレームに関連付けられた前記リソース数に基づいて特定される第1のリソースに割り当てられた前記応答信号、及び、第2のリソースに割り当てられた下り回線制御情報、を前記信号から分離する分離部と、
を具備し、
前記分離部は、
前記端末装置に設定された第1の構成パターン、及び、前記構成パターンを設定変更できない他の端末装置に設定された第2の構成パターンの双方が前記第1のサブフレームであるタイミングでは、前記第2の構成パターンの前記第1のサブフレームに関連付けられた前記リソース数を用いる、
端末装置。 - 前記分離部は、前記第1の構成パターンでは前記第1のサブフレームであり、前記第2の構成パターンでは前記第2のサブフレームであるタイミングにおいては、前記第1の構成パターンの前記第1のサブフレームに関連付けられた前記リソース数を用いる、
請求項1記載の端末装置。 - 前記分離部は、前記第1の構成パターンでは前記第1のサブフレームであり、前記第2の構成パターンでは前記第2のサブフレームであるタイミングにおいては、前記複数の構成パターンの前記第1のサブフレームにそれぞれ関連付けられた前記リソース数の中の最大値を用いる、
請求項1記載の端末装置。 - 前記分離部は、前記第1の構成パターンでは前記第1のサブフレームであり、前記第2の構成パターンでは前記第2のサブフレームであるタイミングにおいては、前記複数の構成パターンの前記第1のサブフレームにそれぞれ関連付けられた前記リソース数の中の最小値を用いる、
請求項1記載の端末装置。 - 前記分離部は、前記第1の構成パターンでは前記第1のサブフレームであり、前記第2の構成パターンでは前記第2のサブフレームであるタイミングにおいては、前記リソース数をゼロとする、
請求項1記載の端末装置。 - 1フレームを構成するサブフレームの構成パターンであって、下り回線の通信に用いられる第1のサブフレームと、上り回線の通信に用いられる第2のサブフレームとを含む複数の前記構成パターンのうちいずれかが設定された端末装置から送信された上り回線データに対する応答信号を生成する生成部と、
前記構成パターンに含まれる前記第1のサブフレームには、上り回線データに対する応答信号を割り当てるリソース数が関連付けられ、前記応答信号が送信される前記第1のサブフレームに関連付けられた前記リソース数に基づいて特定される第1のリソースに、前記応答信号を割り当て、第2のリソースに下り回線制御情報を割り当てる割当部と、
前記応答信号及び前記下り回線制御情報を含む信号を送信する送信手段と、
を具備し、
前記割当部は、
前記端末装置に設定された第1の構成パターン、及び、前記構成パターンを設定変更できない他の端末装置に設定された第2の構成パターンの双方が前記第1のサブフレームであるタイミングでは、前記端末装置に対して、前記第2の構成パターンの前記第1のサブフレームに関連付けられた前記リソース数を用いる、
基地局装置。 - 1フレームを構成するサブフレームの構成パターンであって、下り回線の通信に用いられる第1のサブフレームと、上り回線の通信に用いられる第2のサブフレームとを含む複数の前記構成パターンのいずれかに設定変更可能である端末装置における受信方法であって、
基地局装置から送信された信号を受信し、
前記構成パターンに含まれる前記第1のサブフレームには、上り回線データに対する応答信号を割り当てるリソース数が関連付けられ、前記信号を受信した前記第1のサブフレームに関連付けられた前記リソース数に基づいて特定される第1のリソースに割り当てられた前記応答信号、及び、第2のリソースに割り当てられた下り回線制御情報、を前記信号から分離し、
前記端末装置に設定された第1の構成パターン、及び、前記構成パターンを設定変更できない前記他の端末装置に設定された第2の構成パターンの双方が前記第1のサブフレームであるタイミングでは、前記第2の構成パターンの前記第1のサブフレームに関連付けられた前記リソース数が用いられる、
受信方法。 - 1フレームを構成するサブフレームの構成パターンであって、下り回線の通信に用いられる第1のサブフレームと、上り回線の通信に用いられる第2のサブフレームとを含む複数の前記構成パターンのうちいずれかが設定された端末装置から送信された上り回線データに対する応答信号を生成し、
前記構成パターンに含まれる前記第1のサブフレームには、前記応答信号を割り当てるリソース数が関連づけられ、前記応答信号が送信される前記第1のサブフレームに関連付けられた前記リソース数に基づいて特定される第1のリソースに、前記応答信号を割り当て、第2のリソースに下り回線制御情報を割り当て、
前記応答信号及び前記下り回線制御情報を含む信号を送信し、
前記端末装置に設定された第1の構成パターン、及び、前記構成パターンを設定変更できない前記他の端末装置に設定された第2の構成パターンの双方が前記第1のサブフレームであるタイミングでは、前記端末装置に対して、前記第2の構成パターンの前記第1のサブフレームに関連づけられた前記リソース数が用いられる、
送信方法。
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JP6706778B2 (ja) | 2020-06-10 |
US9826526B2 (en) | 2017-11-21 |
US10966197B2 (en) | 2021-03-30 |
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JP6928857B2 (ja) | 2021-09-01 |
CN108449165B (zh) | 2021-02-19 |
US20150289261A1 (en) | 2015-10-08 |
EP2914032B1 (en) | 2020-08-05 |
CN104704877B (zh) | 2018-07-06 |
JP6241621B2 (ja) | 2017-12-06 |
EP2914032A1 (en) | 2015-09-02 |
US20170111909A1 (en) | 2017-04-20 |
JP6481906B2 (ja) | 2019-03-13 |
JP2018029386A (ja) | 2018-02-22 |
EP3720030A1 (en) | 2020-10-07 |
JP2019083561A (ja) | 2019-05-30 |
CN104704877A (zh) | 2015-06-10 |
EP3720030B1 (en) | 2022-06-15 |
EP2914032A4 (en) | 2015-10-14 |
JP2020141409A (ja) | 2020-09-03 |
CN108449165A (zh) | 2018-08-24 |
US11690053B2 (en) | 2023-06-27 |
US10257826B2 (en) | 2019-04-09 |
US20210185673A1 (en) | 2021-06-17 |
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