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WO2013140526A1 - Dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception, système de communication sans fil et procédé de communication - Google Patents

Dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception, système de communication sans fil et procédé de communication Download PDF

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Publication number
WO2013140526A1
WO2013140526A1 PCT/JP2012/057074 JP2012057074W WO2013140526A1 WO 2013140526 A1 WO2013140526 A1 WO 2013140526A1 JP 2012057074 W JP2012057074 W JP 2012057074W WO 2013140526 A1 WO2013140526 A1 WO 2013140526A1
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WIPO (PCT)
Prior art keywords
region
candidate group
mapping
region candidate
transmission
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Japanese (ja)
Inventor
義博 河▲崎▼
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Fujitsu Ltd
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Fujitsu Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • 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
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H04L5/0046—Determination of the number of bits transmitted on different sub-channels
    • 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 signalling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to a transmission device, a reception device, a transmission method, a reception method, a wireless communication system, and a communication method.
  • 3GPP LTE 3rd Generation Partnership Project Radio Access Network Long Term Evolution
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access as an uplink communication system
  • a base station performs communication with a terminal by assigning radio resources to the terminal. Specifically, the base station notifies the resource allocation result for downlink data and uplink data by transmitting allocation control information (L1 / L2 control information) to the terminal.
  • the allocation control information is transmitted to the terminal using PDCCH (Physical Downlink Control Channel).
  • PDCCH Physical Downlink Control Channel
  • the resource region to which the PDCCH can be mapped covers the entire downlink radio section bandwidth in the frequency axis direction and extends from the top of the subframe to several OFDM symbols in the time axis direction.
  • FIG. 1 is a diagram illustrating an example of an LTE subframe. The type of allocation control information used differs depending on whether or not MIMO transmission is applied to downlink data transmission. In LTE, allocation control information is regulated to be modulated by QPSK.
  • the downlink data is transmitted from the base station to the terminal using PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • each PDCCH is mapped to a resource area composed of one or a plurality of continuous CCEs (Control Channel Elements).
  • One CCE is composed of 36 REs (Resource Elements).
  • RE is a minimum unit of radio resources defined by one OFDM symbol and one subcarrier. Since PDCCH is modulated by QPSK, 2 bits of post-coding information are mapped to one RE with respect to RE further constituting CCE constituting PDCCH.
  • the number of CCEs constituting the resource region to which one PDCCH is mapped (CCE concatenation number: aggregation level) is selected from 1, 2, 4, and 8.
  • the allocation control information includes a CRC bit (16-bit length) masked by the destination terminal ID in order to identify the destination terminal. Then, the terminal demasks the CRC bits included in the allocation control information with its own ID, that is, determines whether the allocation control information is addressed to itself by “blind decoding”. it can.
  • mapping area candidates resource area candidates to which the PDCCH for each terminal is mapped
  • the number of mapping area candidates is determined for each aggregation level.
  • the mapping area candidate may be referred to as a search space (Search Space).
  • search space corresponds to a unit for blind decoding, and can also be called a “decoding region candidate” or a “processing target region candidate”.
  • LTE-A 3GPP LTE-Advanced
  • a part of the PDSCH region to which the PDSCH is mapped may be used as the PDCCH region. It is being considered.
  • this PDCCH region may be referred to as a “second type PDCCH region”.
  • FIG. 2 is a diagram illustrating an example of an LTE-A subframe. Note that a “second type PDCCH region” or a region in which the first type PDCCH region and the second type PDCCH region are combined may be referred to as an “E (Enhanced) -PDCCH region”.
  • PDSCH supports not only QPSK (Quadrature Phase Shift Keying) but also multiple modulation multi-values such as 16QAM (Quadrature Amplitude Modulation) and 64QAM. Therefore, it is considered to apply not only QPSK but also 16QAM to PDCCH transmitted in the second type PDCCH region.
  • QPSK Quadrature Phase Shift Keying
  • 16QAM Quadrature Amplitude Modulation
  • 64QAM 64QAM
  • the disclosed technology has been made in view of the above, and can reduce the processing burden on the reception side even when a plurality of transmission methods are applied.
  • the transmission device, the reception device, the transmission method, the reception method, and wireless communication It is an object to provide a system and a communication method.
  • a modulation unit that modulates a control signal addressed to a receiving apparatus using one transmission method among a plurality of transmission methods, and a plurality of mapping region candidates corresponding to the one transmission method
  • Identification of a receiving unit that determines a mapping region that maps the modulated control signal from the region candidate group, a mapping unit that maps the modulated control signal to the determined mapping region, and A setting unit that determines a start position in a control channel element sequence based on information and information on a subframe to which the modulated control signal is mapped, and sets the region candidate group from the start position;
  • a first region candidate group corresponding to a first transmission method among the plurality of transmission methods, and a first region candidate group different from the first transmission method.
  • the second region candidate group corresponding to the transmission scheme, the starting position, and the head position of each mapping area candidates are matched.
  • FIG. 1 is a diagram illustrating an example of an LTE subframe.
  • FIG. 2 is a diagram illustrating an example of an LTE-A subframe.
  • FIG. 3 is a block diagram illustrating an example of the base station according to the first embodiment.
  • FIG. 4 is a block diagram illustrating an example of a terminal according to the first embodiment.
  • FIG. 5 is a flowchart illustrating an example of operation processing of the base station according to the first embodiment.
  • FIG. 6 is a diagram illustrating a setting example of area candidate groups according to the first embodiment.
  • FIG. 7 is a flowchart illustrating an example of operation processing of the terminal according to the first embodiment.
  • FIG. 8 is a diagram illustrating an example of a region candidate group according to the second embodiment.
  • FIG. 9 is a diagram illustrating an example of a region candidate group according to the third embodiment.
  • FIG. 10 is a diagram illustrating an example of a region candidate group according to the fourth embodiment.
  • FIG. 11 is a diagram illustrating a hardware configuration of the base station.
  • FIG. 12 is a diagram illustrating a hardware configuration of the terminal.
  • FIG. 3 is a block diagram illustrating an example of the base station according to the first embodiment.
  • the base station 10 includes a region candidate group setting unit 11, a mapping region determination unit 12, encoding units 13 and 14, modulation units 15 and 16, a mapping unit 17, a multiplexing unit 18, and an IFFT.
  • An (Inverse Fast Fourier Transform) unit 19 and a transmission RF (Radio Frequency) unit 20 are included.
  • the region candidate group setting unit 11 receives, as an input signal, identification information of a terminal 30 that is a transmission destination of a control signal, which will be described later, and information on a subframe to which a control signal transmitted to the terminal 30 is mapped.
  • the identification information of the terminal 30 is, for example, a terminal number, and the information related to the subframe is a subframe number.
  • the region candidate group setting unit 11 determines the start position in the control channel element sequence based on the terminal number and the subframe number, and sets the “region candidate group” from the start position.
  • the area candidate group is set for each combination of the transmission method and the aggregation level (that is, the connection level or the number of connections).
  • the transmission method is a modulation method in the first embodiment.
  • Each region candidate group includes a plurality of mapping region candidates each including the same number of control channel elements (CCEs).
  • CCEs control channel elements
  • the arrangement pattern of mapping area candidates in the area candidate group is determined. For this reason, the region candidate group setting unit 11 can set a region candidate group by applying the arrangement pattern to the control channel element sequence by aligning the head with the determined start position.
  • the arrangement pattern is a pattern in which mapping area candidates are continuous.
  • the mapping area determination unit 12 receives information indicating a transmission method and information indicating the number of connections as an input signal. The mapping region determination unit 12 then selects from among the region candidate groups corresponding to the combination of the transmission method and the aggregation level indicated by the input signal among the plurality of region candidate groups set by the region candidate group setting unit 11. Then, a “mapping region” for mapping the control signal is determined.
  • the mapping area is a resource area where the control signal is actually mapped.
  • the encoding unit 13 encodes the downlink data signal, and the modulation unit 15 modulates the encoded data signal according to the modulation multi-level number indicated by the transmission method information, and outputs the modulated data signal to the multiplexing unit 18.
  • the encoding unit 14 encodes the control signal, and the modulation unit 16 modulates the encoded control signal and outputs the modulated control signal to the multiplexing unit 18.
  • the control signal includes allocation control information related to resources for mapping downlink data signals.
  • the control signal is a control channel (for example, PDCCH).
  • the mapping unit 17 maps the control signal modulated by the modulation unit 16 to the mapping region determined by the mapping region determination unit 12.
  • the multiplexing unit 18 multiplexes the data signal received from the modulation unit 15 and the control signal received from the modulation unit 16 on the time axis and the frequency axis, and outputs the obtained multiplexed signal to the IFFT unit 19.
  • the IFFT unit 19 obtains an OFDM signal by converting the multiplexed signal received from the multiplexing unit 18 into a time waveform.
  • the transmission RF unit 20 performs transmission radio processing (frequency up-conversion, digital analog (D / A) conversion, power amplification, etc.) on the OFDM signal received from the IFFT unit 19, and transmits the signal via an antenna.
  • transmission radio processing frequency up-conversion, digital analog (D / A) conversion, power amplification, etc.
  • FIG. 4 is a block diagram illustrating an example of a terminal according to the first embodiment.
  • the terminal 30 includes a reception RF unit 31, an FFT (Fast Fourier Transform) unit 32, a separation unit 33, a region candidate group setting unit 34, a demapping unit 35, demodulation units 36 and 37, Decoding units 38 and 39 are included.
  • FFT Fast Fourier Transform
  • the reception RF unit 31 receives a radio signal transmitted from the base station 10 via an antenna, and performs reception radio processing (low noise amplification, frequency down-conversion, analog digital (A / D) conversion, etc. on the radio signal. ).
  • reception radio processing low noise amplification, frequency down-conversion, analog digital (A / D) conversion, etc. on the radio signal.
  • the received OFDM signal thus obtained is output to FFT section 32.
  • the FFT unit 32 converts the received OFDM signal into a frequency domain signal and outputs it to the separation unit 33.
  • the separation unit 33 outputs to the demapping unit 35 components that may include a control signal among the signals received from the FFT unit 32.
  • the separation unit 33 outputs a data signal (that is, a PDSCH signal) among signals received from the FFT unit 32 to the demodulation unit 37.
  • the region candidate group setting unit 34 receives the identification information of the own device and information on the subframe to which the control signal addressed to the own device is mapped as an input signal.
  • the identification information of the own device is, for example, a terminal number
  • the information regarding the subframe is a subframe number.
  • the region candidate group setting unit 34 determines the start position in the control channel element sequence based on the terminal number and the subframe number, and sets the “region candidate group” from the start position.
  • the area candidate group is set for each combination of the transmission method and the number of connections.
  • the transmission method is a modulation method in the first embodiment.
  • Each region candidate group includes a plurality of processing target region candidates each including the same number of control channel elements (CCEs). Further, as in the case of the base station 10, there are four levels 1, 2, 4, and 8 for the number of connections.
  • CCEs control channel elements
  • the region candidate group setting unit 34 can set a region candidate group by applying the arrangement pattern to the control channel element sequence by aligning the head with the determined start position.
  • the arrangement pattern is a pattern in which processing target area candidates are continuous.
  • the demapping unit 35 extracts control channel candidates from the respective processing target region candidates of all region candidate groups set by the region candidate group setting unit 34, and outputs the extracted plurality of control channel candidates to the demodulation unit 36. .
  • the demodulation unit 36 and the decoding unit 38 perform blind decoding on a plurality of control channel candidates received from the demapping unit 35. That is, the demodulation unit 36 and the decoding unit 38 demodulate and decode each of a plurality of control channel candidates received from the demapping unit 35, and specify a control channel addressed to the own device. Demodulation and decoding processes are performed using a reception method corresponding to the transmission method corresponding to the region candidate group to which the processing target region candidate from which each control channel candidate is extracted belongs.
  • the specified control channel (for example, PDCCH) addressed to its own device is output to demodulation section 37.
  • the demodulating unit 37 and the decoding unit 39 extract received data from the signal received from the demultiplexing unit 33, and for the extracted received data Perform error detection.
  • FIG. 5 is a flowchart illustrating an example of operation processing of the base station 10 according to the first embodiment.
  • the region candidate group setting unit 11 determines a start position in the control channel element sequence based on the terminal number and the subframe number, and sets a region candidate group from the start position (step S11).
  • the area candidate group is set for each combination of the transmission method and the number of connections.
  • FIG. 6 is a diagram illustrating a setting example of area candidate groups according to the first embodiment.
  • FIG. 6 shows the region candidate groups when the number of connections is 1 and 2, and the region candidate group when the modulation scheme is QPSK and the region candidate group when 16QAM.
  • the start position of the entire area candidate group and each mapping area candidate constituting the area candidate group The start position matches.
  • This position match means position match in the CCE domain, that is, the region of the control channel element sequence.
  • the arrangement pattern of area candidate groups in the case of QPSK is a pattern in which mapping area candidates are continuous, whereas the arrangement pattern of area candidate groups in the case of 16QAM is arranged such that mapping area candidates are arranged with an interval of 0.5 CCE. It is a pattern. That is, in the arrangement pattern of area candidate groups in the case of 16QAM, the separation interval S between two adjacent mapping area candidates is 0.5 CCE.
  • mapping area determination unit 12 performs control from among the area candidate groups corresponding to the combination of the transmission method and the number of connections indicated by the input signal among the plurality of area candidate groups set in step S11. A mapping area for mapping the signal is determined (step S12).
  • the mapping unit 17 maps the control signal modulated by the modulation unit 16 to the mapping region determined by the mapping region determination unit 12 (step S13).
  • the number of information bits represented by the control signal mapped to each mapping area candidate is common even if the modulation schemes are different. That is, the number of REs required for mapping the control signal is smaller as the modulation scheme having a larger modulation multi-level number is used. That is, when attention is focused on one connected number, the number of REs constituting the mapping area candidate decreases as a modulation scheme having a large modulation multi-level number is used (see FIG. 6).
  • the mapping area candidate corresponding to the first modulation scheme is the mapping area corresponding to the second modulation scheme. It is larger in the region of the control channel element sequence than the candidate.
  • the control signal mapped in this way is transmitted via the multiplexing unit 18, the IFFT unit 19, the transmission RF unit 20, and the like.
  • FIG. 7 is a flowchart illustrating an example of operation processing of the terminal 30 according to the first embodiment.
  • the region candidate group setting unit 34 determines a start position in the control channel element sequence based on the terminal number and the subframe number, and sets a region candidate group from the start position (step S21).
  • the area candidate group is set for each combination of the transmission method and the number of connections. That is, the area candidate group setting unit 34 sets area candidate groups for each of the numbers of connections 1, 2, 4, and 8.
  • the plurality of region candidate groups set in the region candidate group setting unit 34 are set in the region candidate group setting unit 11 of the base station 10 except that the mapping region candidate is a processing target region candidate. It is the same.
  • the start position of the entire area candidate group and the start position of each mapping area candidate constituting the area candidate group are the same regardless of the modulation scheme. For this reason, the start position calculated about one modulation system can be used also for another modulation system. As a result, it is possible to reduce processing at the terminal 30 on the control signal receiving side.
  • the demapping unit 35 extracts a control channel candidate from each processing target region candidate of all region candidate groups set by the region candidate group setting unit 34 (step S22).
  • control channel candidates are extracted from each processing target area candidate constituting each area candidate group of the connected numbers 1, 2, 4, and 8.
  • the demodulation unit 36 and the decoding unit 38 perform blind decoding on the plurality of control channel candidates extracted in step S22 (step S23).
  • the number of bits obtained by demodulating each control channel candidate matches. For this reason, since the size of the processing target in the subsequent functional unit is the same regardless of the modulation method, the processing load is reduced.
  • the region candidate group setting unit 11 determines the start position in the control channel element sequence based on the terminal number and the subframe number, and starts the region from the start position.
  • the first region candidate group and the second region candidate group that are set have the same start position and the leading position of each mapping region candidate.
  • the first region candidate group corresponds to a first modulation multilevel number among a plurality of modulation multilevel numbers.
  • the second region candidate group has the same connection level as the first region candidate group and corresponds to a second modulation multilevel number different from the first modulation multilevel number.
  • the region candidate group setting unit 34 determines a start position in the control channel element sequence based on the identification information of the own device and the subframe number to be processed, and the region candidate is determined from the start position.
  • the first region candidate group and the second region candidate group that are set have the same start position and the leading position of each mapping region candidate.
  • the first region candidate group corresponds to a first modulation multilevel number among a plurality of modulation multilevel numbers.
  • the second region candidate group has the same connection level as the first region candidate group and corresponds to a second modulation multilevel number different from the first modulation multilevel number.
  • the start position of the entire area candidate group and the start position of each mapping area candidate constituting the area candidate group can be matched. For this reason, the start position calculated about one modulation system can be used also for another modulation system. As a result, it is possible to reduce processing at the terminal that is the control signal receiving side.
  • the PDCCH for performing resource allocation for PDCCH and the PDCCH for performing resource allocation for the PDSCH on the second component carrier coexist, it is preferable to avoid matching the search space arrangement locations for both PDCCHs. .
  • the region candidate group setting unit 11 determines the start position in the control channel element sequence based on the terminal number, the subframe number, and the component carrier number. Note that performing resource allocation for both PDSCHs of the second component carrier by the PDCCH of the first component carrier may be referred to as “cross-carrier scheduling” below.
  • Example 2 In the second embodiment, a plurality of region candidate groups corresponding to a modulation multi-value number larger than the reference modulation multi-value number are set, and the set region candidate groups are shifted from each other so as not to overlap, and All of the area candidate groups corresponding to the reference modulation multilevel number overlap. Since the basic configurations of the base station and the terminal of the second embodiment are the same as those of the first embodiment, the present embodiment will be described with reference to FIGS. 3 and 4.
  • the region candidate group setting unit 11 sets a region candidate group for each combination of transmission method and connection level, as in the first embodiment.
  • the area candidate group setting unit 11 sets a plurality of area candidate groups for the area candidate group corresponding to the modulation multilevel number larger than the reference modulation multilevel number.
  • the plurality of region candidate groups are shifted from each other and do not overlap, and all the region candidate groups corresponding to the reference modulation multi-level number overlap.
  • FIG. 8 is a diagram illustrating an example of a region candidate group according to the second embodiment.
  • QPSK is a modulation scheme corresponding to the basic modulation multilevel number.
  • the region candidate group setting unit 11 sets the first region candidate group as shown in FIG. 6 for 16QAM. Then, the area candidate group setting unit 11 sets a second area candidate group as shown in FIG. 8 for 16QAM.
  • the first region candidate group and the second region candidate group are shifted by a predetermined offset value in the region of the control channel element sequence and do not overlap.
  • the offset value is 0.5 CCE.
  • the first area candidate group and the second area candidate group both overlap with the area candidate groups corresponding to QPSK and the number of connections 1. In addition, it is not limited to the number of connections 1, and the same holds true for other numbers of connections, except that the offset values are different.
  • the region candidate group setting unit 34 sets a plurality of region candidate groups by the same method as the region candidate group setting unit 11 on the transmission side.
  • the region candidate group setting unit 11 has a plurality of region candidate groups for a region candidate group corresponding to a modulation multi-level number larger than the reference modulation multi-level number. Set. The plurality of region candidate groups are shifted from each other and do not overlap, and all the region candidate groups corresponding to the reference modulation multi-level number overlap.
  • the region candidate group setting unit 34 sets a plurality of region candidate groups for the region candidate group corresponding to the modulation multilevel number larger than the reference modulation multilevel number.
  • the plurality of region candidate groups are shifted from each other and do not overlap, and all the region candidate groups corresponding to the reference modulation multi-level number overlap.
  • the technology described above can be applied to communication in each component carrier even in communication using a plurality of component carriers, that is, communication using carrier aggregation.
  • the region candidate group setting unit 11 determines the start position in the control channel element sequence based on the terminal number, the subframe number, and the component carrier number. .
  • the third embodiment will be described as an embodiment corresponding to the first embodiment and the transmission scheme is MIMO
  • the fourth embodiment will be described as an embodiment corresponding to the second embodiment and the transmission scheme being MIMO.
  • the first embodiment and the second embodiment are described on the assumption that the number of antennas is 1, that is, the case of non-MIMO. Therefore, the base station and the terminal according to the third embodiment and the fourth embodiment may prepare a configuration corresponding to one stream of the base station 10 and the terminal 30 according to the first embodiment for the number of antennas. That is, since the basic configurations of the base station and the terminal of the third and fourth embodiments are the same as those of the first embodiment, this embodiment will be described with reference to FIGS. 3 and 4.
  • the area candidate group setting unit 11 basically has the same function as that of the first embodiment. However, the area candidate group is set for each combination of the number of spatial layer multiplexing and the number of connections.
  • FIG. 9 is a diagram illustrating an example of a region candidate group according to the third embodiment.
  • the region candidate group in the case of spatial layer multiplexing number 2 and the region candidate group in the case of non-MIMO, the start position of the entire region candidate group, and the region candidate The start positions of the mapping area candidates constituting the group match.
  • This position match means position match in the CCE domain, that is, the region of the control channel element sequence.
  • the region candidate group setting unit 34 sets a plurality of region candidate groups by the same method as the region candidate group setting unit 11 on the transmission side.
  • the region candidate group setting unit 11 determines the start position in the control channel element sequence based on the terminal number and the subframe number, and starts the region from the start position.
  • the first region candidate group and the second region candidate group that are set have the same start position and the leading position of each mapping region candidate.
  • the first region candidate group corresponds to the first spatial layer multiplexing number among the plurality of spatial layer multiplexing numbers.
  • the second region candidate group has the same connection level as the first region candidate group and corresponds to a second spatial layer multiplexing number different from the first spatial layer multiplexing number.
  • the region candidate group setting unit 34 determines a start position in the control channel element sequence based on the identification information of the own device and the subframe number to be processed, and the region candidate is determined from the start position.
  • the first region candidate group and the second region candidate group that are set have the same start position and the leading position of each mapping region candidate.
  • the first region candidate group corresponds to the first spatial layer multiplexing number among the plurality of spatial layer multiplexing numbers.
  • the second region candidate group has the same connection level as the first region candidate group and corresponds to a second spatial layer multiplexing number different from the first spatial layer multiplexing number.
  • the start position of the entire area candidate group and the start position of each mapping area candidate constituting the area candidate group can be matched.
  • the start position calculated for one spatial layer multiplexing number can be used for other modulation schemes. As a result, it is possible to reduce processing at the terminal that is the control signal receiving side.
  • both MIMO and non-MIMO are not applied to communication between the base station 10 and one terminal 30 in one subframe of one component carrier.
  • the communication between the base station 10 and one terminal 30 when carrier aggregation is used, it is possible to independently apply MIMO or non-MIMO for each component carrier in one subframe. Therefore, considering the entire communication between the base station 10 and one terminal 30, region candidate groups are set for each combination of the number of spatial layer multiplexing and the number of connections at the same scheduling timing.
  • the area candidate group is set for each combination of the number of spatial layer multiplexing and the number of connections.
  • the fourth embodiment corresponds to the second embodiment and is an embodiment in which the transmission method is MIMO.
  • the region candidate group setting unit 11 sets a region candidate group for each combination of the spatial layer multiplexing number and the connection level, as in the third embodiment.
  • the area candidate group setting unit 11 sets a plurality of area candidate groups for the area candidate group corresponding to the spatial layer multiplexing number larger than the reference spatial layer multiplexing number.
  • the plurality of area candidate groups are shifted from each other and do not overlap, and all the area candidate groups corresponding to the reference spatial layer multiplexing number overlap.
  • FIG. 10 is a diagram illustrating an example of a region candidate group according to the fourth embodiment.
  • the spatial layer multiplexing number 1 is the basic modulation multilevel number.
  • the first region candidate group and the second region candidate group are shifted by a predetermined offset value in the region of the control channel element sequence and do not overlap.
  • the offset value is 0.5 CCE.
  • the first area candidate group and the second area candidate group both overlap with the area candidate groups corresponding to QPSK and the number of connections 1. In addition, it is not limited to the number of connections 1, and the same holds true for other numbers of connections, except that the offset values are different.
  • the region candidate group setting unit 34 sets a plurality of region candidate groups by the same method as the region candidate group setting unit 11 on the transmission side.
  • the region candidate group setting unit 11 has a plurality of region candidate groups for a region candidate group corresponding to a spatial layer multiplexing number larger than the reference spatial layer multiplexing number.
  • the plurality of area candidate groups are shifted from each other and do not overlap, and all the area candidate groups corresponding to the reference spatial layer multiplexing number overlap.
  • the area candidate group setting unit 34 sets a plurality of area candidate groups for the area candidate group corresponding to the spatial layer multiplexing number larger than the reference spatial layer multiplexing number.
  • the plurality of area candidate groups are shifted from each other and do not overlap, and all the area candidate groups corresponding to the reference spatial layer multiplexing number overlap.
  • the area candidate group is set for each combination of the number of spatial layer multiplexing and the number of connections.
  • the region candidate group is set by the combination of the modulation multi-level number and the concatenation number or the combination of the spatial layer multiplexing number and the concatenation number. It is not limited to.
  • the area candidate group may be set for each combination of the modulation multi-level number, the spatial layer multiplexing number, and the concatenation number.
  • the separation interval S between two adjacent mapping region candidates in an arbitrary region candidate group can be expressed by the following equation.
  • S (1-2 / (M ⁇ SL)) ⁇ AL ⁇ CCE
  • M is a modulation multilevel number.
  • SL is a spatial layer multilevel number.
  • AL is the number of connections.
  • the base stations and terminals of the first to fourth embodiments can be realized by the following hardware configuration.
  • FIG. 11 is a diagram illustrating a hardware configuration of the base station.
  • the base station 10 includes, as hardware components, a DSP (Digital Signal Processor) 10a, an FPGA (Field Programmable Gate Array) 10b, a memory 10c, and an RF (Radio Frequency) circuit 10d. And a network IF (Inter Face) 10e.
  • the DSP 10a and the FPGA 10b are connected so that various signals and data can be input / output via a network IF 10e such as a switch.
  • the RF circuit 10d has an antenna.
  • the memory 10c includes, for example, a RAM such as SDRAM (Synchronous Random Access Memory), a ROM (Read Only Memory), and a flash memory.
  • the region candidate group setting unit 11, the mapping region determination unit 12, the encoding units 13 and 14, the modulation units 15 and 16, the mapping unit 17, the multiplexing unit 18, and the IFFT unit 19 are, for example, a DSP 10a and an FPGA 10b. Etc. are realized by an integrated circuit.
  • the transmission RF unit 20 is realized by the RF circuit 10d.
  • FIG. 12 is a diagram illustrating a hardware configuration of the terminal.
  • the terminal 30 includes a CPU (Central Processing Unit) 30a, a memory 30b, an RF circuit 30c having an antenna, and a display device 30d such as an LCD (Liquid Crystal Display).
  • the memory 30b is configured by, for example, a RAM such as an SDRAM, a ROM, or a flash memory.
  • the reception RF unit 31 is realized by the RF circuit 30c.
  • the FFT unit 32, the separation unit 33, the region candidate group setting unit 34, the demapping unit 35, the demodulation units 36 and 37, and the decoding units 38 and 39 are realized by an integrated circuit such as a CPU 30a.
  • the FFT unit 32, the separation unit 33, the region candidate group setting unit 34, the demapping unit 35, the demodulation units 36 and 37, and the decoding units 38 and 39 are realized by an integrated circuit such as a CPU 30a.
  • the various processes described in the first to fourth embodiments can be realized by executing a program prepared in advance on a computer. That is, it is executed by the region candidate group setting unit 11, the mapping region determination unit 12, the encoding units 13 and 14, the modulation units 15 and 16, the mapping unit 17, the multiplexing unit 18, and the IFFT unit 19.
  • a program corresponding to each process may be recorded in the memory 10c, and each program may be read out to the DSP 10a and the FPGA 10b to function as a process.
  • programs corresponding to the processes executed by the FFT unit 32, the separation unit 33, the region candidate group setting unit 34, the demapping unit 35, the demodulation units 36 and 37, and the decoding units 38 and 39 are provided.
  • the program may be recorded in the memory 30b and read out by the CPU 30a to function as a process.
  • the base station 10 and the terminal 30 have been described as examples.
  • the present invention is not limited to this, and the above-described embodiment also holds true for a transmission device and a reception device that receives a control signal transmitted from the transmission device.
  • mapping region determination unit 13 10 base station 11, 34 region candidate group setting unit 12 mapping region determination unit 13, 14 encoding unit 15, 16 modulation unit 17 mapping unit 18 multiplexing unit 19 IFFT unit 20 transmission RF unit 30 terminal 31 reception RF unit 32 FFT unit 33 Separation unit 35 Demapping unit 36, 37 Demodulation unit 38, 39 Decoding unit

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, dans une station de base (10), une unité de définition de groupes de candidats de région (11) détermine une position de départ dans une séquence d'éléments de canal de commande, d'après un numéro de terminal et un numéro de sous-trame, et définit des groupes de candidats de région à partir de ladite position de départ. Un premier groupe de candidats de région et un deuxième groupe de candidats de région qui ont été définis ont des positions de départ correspondantes et des positions de tête correspondantes pour chaque candidat de région de mise en correspondance. Le premier groupe de candidats de région correspond à un premier numéro multi-valeurs de modulation faisant partie d'une pluralité de numéros multi-valeurs de modulation. Le deuxième groupe de candidats de région a le même niveau de liaison que le premier groupe de candidats de région, et correspond à un deuxième numéro multi-valeurs de modulation qui est différent du premier numéro multi-valeurs de modulation.
PCT/JP2012/057074 2012-03-19 2012-03-19 Dispositif d'émission, dispositif de réception, procédé d'émission, procédé de réception, système de communication sans fil et procédé de communication Ceased WO2013140526A1 (fr)

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JP2017525237A (ja) * 2014-06-20 2017-08-31 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． データ伝送方法及び装置
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