WO2016129417A1 - 通信装置 - Google Patents
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- WO2016129417A1 WO2016129417A1 PCT/JP2016/052705 JP2016052705W WO2016129417A1 WO 2016129417 A1 WO2016129417 A1 WO 2016129417A1 JP 2016052705 W JP2016052705 W JP 2016052705W WO 2016129417 A1 WO2016129417 A1 WO 2016129417A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
- H04L25/03898—Spatial equalizers codebook-based design
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0069—Allocation based on distance or geographical location
Definitions
- the present invention relates to a communication device that transmits and receives signals using beamforming.
- the PDSCH is a data channel that transmits data on a downlink that is a line in a direction from a base station to a terminal.
- the PDCCH is a control channel that transmits control information including various kinds of information necessary for performing demodulation and decoding of the PDSCH.
- the control information transmitted on the PDCCH includes information such as the location on the PDSCH frequency, the modulation scheme, and the number of spatial multiplexing.
- the subframe used in LTE includes a PDCCH region and a PDSCH region on the frequency and time axis.
- the PDCCH area is an area to which a control channel PDCCH is allocated
- the PDSCH area is an area to which a data channel PDSCH is allocated.
- a PDCCH and a PDSCH to be transmitted to a certain terminal are allocated to a partial area of the PDCCH area and the PDSCH area, respectively.
- the terminal In order to receive the PDSCH, the terminal first detects the PDCCH addressed to itself. Although the position and bit size of the PDCCH are limited for each terminal, there are many candidates. For example, there are 22 candidates in the 3GPP Release 9 standard.
- the terminal demodulates and decodes the plurality of candidates using the local station ID, and detects the PDCCH addressed to the local station based on the decoding result. That is, when decoding is successful, it is determined that the PDCCH is addressed to the own station.
- control information for demodulating and decoding the PDSCH can be obtained, and the PDSCH is demodulated and decoded based on the obtained control information.
- the position of PDCCH is not fixed, but a plurality of arrangement candidates are provided, so that the base station can simultaneously transmit PDCCH and PDSCH to a plurality of terminals and freely select a combination of the plurality of terminals.
- by having a plurality of PDCCH bit sizes it is possible to adjust the number of redundant bits for PDCCH error correction according to the communication quality between the base station and the terminal, and effectively use a finite PDCCH region. can do.
- radio signals fly only in the direction in which the communication target terminal exists. Therefore, for example, considering a case where one base station communicates with the terminals T1 and T2, if the terminal T1 and the terminal T2 exist in different directions with respect to the base station, the base station has the same frequency / time resource. Can be transmitted simultaneously to the terminal T1 and the terminal T2, leading to effective use of radio resources. That is, spatial multiplexing in which a plurality of terminals are multiplexed using the space axis is possible.
- the first method is a method of covering a service area by arranging a plurality of beams whose directions are fixed. In this case, the base station switches the fixed beam according to the movement of the terminal and uses an appropriate beam.
- the second method is a method in which the beam direction is variable, the beam is irradiated in the direction in which the communicating terminal exists, and the beam direction is made to follow the movement of the terminal.
- the terminal In the system in which the first method is applied and the beam is switched, it is necessary to quickly switch so that the communication is not interrupted by the beam switching control.
- the terminal always receives a plurality of beams. That is, the terminal receives a plurality of beams, and detects a control channel corresponding to LTE PDCCH for each of the beams.
- the base station that performs transmission can instantaneously switch the beam when a beam switching trigger occurs.
- the terminal detects a control channel for each of a plurality of beams the number of times of trying to detect the control channel increases, and the processing amount of the terminal increases.
- a reference signal (hereinafter referred to as “RS”) whose signal pattern is defined in advance is used. That is, the terminal estimates how the wireless transmission path has an influence on the signal depending on the received RS distortion, and based on the estimation result, the terminal carries a signal on which information on the control channel and the data channel is recorded. Demodulate. In the above-described operation in which a terminal receives a plurality of beams and detects a control channel, different RSs defined for each beam are used.
- the base station does not use the beam when transmitting the control channel, but uses the beam only when transmitting the data channel corresponding to the PDSCH. It is possible. However, in the fifth generation mobile communication system, it is considered that the frequency bandwidth becomes wider than before, and the number of terminals that simultaneously transmit data channels increases. For this reason, if spatial multiplexing using beams is not performed in the control channel region, there is a possibility that the region for transmitting the control channel may be insufficient.
- Patent Document 1 discloses an invention in which an E-PDCCH that is a control channel corresponding to PDCCH is arranged in a PDSCH region, and a beam is used for transmission of this E-PDCCH.
- the terminal first receives the E-PDCCH in order to demodulate and decode the E-PDSCH, which is a data channel corresponding to PDSCH.
- the beam is also used for transmission of E-PDCCH, PDCCH is received earlier in order to demodulate and decode E-PDCCH. This PDCCH does not use a beam.
- Patent Document 1 also discloses a method of transmitting control information that has been placed on the PDCCH on a broadcast channel. Patent Document 1 also discloses a method for specifying spatially multiplexed E-PDCCH without using any PDCCH or broadcast channel.
- the terminal receives control information from two types of control information mounting channels of E-PDCCH and PDCCH, or from two types of control information mounting channels of E-PDCCH and broadcast channel.
- the processing amount becomes high.
- the E-PDCCH is specified using an RS determined in advance for each layer. Specifically, the terminal performs reception processing by changing the RS in order, and the E-PDCCH addressed to the local station is placed in the layer associated with the RS obtained with a high SNR (Signal to Noise Ratio), that is, the beam.
- SNR Signal to Noise Ratio
- E-PDCCH demodulation and decoding processing is performed preferentially. However, in this case, since the SNR evaluation is performed for a plurality of layers while changing the RS, the processing amount increases. Also, it is not guaranteed that the E-PDCCH demodulation and decoding process is always completed once.
- the present invention has been made in view of the above, and provides a communication device that realizes effective use of radio resources for control channel transmission while preventing an increase in processing amount for control channel detection on the receiving side.
- the purpose is to obtain.
- the present invention is a communication device that transmits a signal using beamforming, and includes a transmission signal generation unit, a reference signal generation unit, and a transmission unit.
- the transmission signal generation means individually encodes and modulates one or more pieces of data to generate a data signal, and individually encodes and modulates the same number of control information used for data signal reception processing. Then, a control signal is generated.
- the reference signal generating means generates a unique reference signal for each destination used in transmission path estimation in the data signal and control signal reception processing.
- the transmission unit arranges the data signal in the data channel, and transmits the control signal and the reference signal in the control channel so that the same transmission destination exists in the same region.
- the figure which shows the structural example of the control channel which the communication apparatus concerning Embodiment 1 transmits The figure which shows the structure of the sub-frame currently used by LTE. The figure which shows the structural example of the control channel which the communication apparatus concerning Embodiment 1 transmits. The figure which shows the structural example of the base station which is a communication apparatus concerning Embodiment 1.
- movement of the control part with which the base station concerning Embodiment 1 is provided.
- movement of the arrival direction estimation part with which the base station concerning Embodiment 1 is provided.
- movement of the control part with which the terminal concerning Embodiment 1 is provided.
- movement of RS detection part with which the terminal concerning Embodiment 1 is provided.
- the figure which shows an example of the interference between beams assumed in Embodiment 2 The figure which shows the structural example of the base station of Embodiment 2.
- FIG. The figure which shows the structural example of the terminal of Embodiment 2.
- FIG. FIG. 10 is a diagram illustrating a configuration example of a subframe used in Embodiment 3
- FIG. The flowchart which shows an example of the operation
- the communication device is a base station or a terminal of a wireless communication system.
- FIG. FIG. 1 and FIG. 3 are diagrams illustrating a configuration example of a control channel transmitted by the communication apparatus according to the first embodiment.
- the control channel shown in FIGS. 1 and 3 is referred to as N-PDCCH.
- FIG. 1 is a diagram showing an outline of the N-PDCCH region and the data channel PDSCH region.
- the N-PDCCH area is an area reserved for transmitting the control channel PDCCH
- the PDSCH area is an area reserved for transmitting the data channel PDSCH.
- the region is divided into N-PDCCH and PDSCH in the system frequency band.
- the method of dividing the area is not limited to this.
- the N-PDCCH region and the data channel PDSCH region may be divided in the time direction.
- the subframe shown in FIG. 2 has the same configuration as the subframe used in LTE.
- FIG. 3 shows an example in which N-PDCCH is spatially multiplexed by a beam.
- the example shown in FIG. 3 is configured such that a plurality of terminals share and use the N-PDCCH region that is the control channel region. That is, in the N-PDCCH region of the beam B1, the terminals T1 to T4 share the region, and in the N-PDCCH region of the beam B2, the terminal T5 to the terminal T8 share the region.
- the N-PDCCH region is divided into a plurality of small regions and used by a plurality of terminals.
- the position where the N-PDCCH region is divided into a plurality of small regions that is, the boundaries of the plurality of divided small regions in the N-PDCCH region are fixed.
- a control signal and a reference signal transmitted to a certain terminal are arranged.
- communication is performed using different reference signals for each terminal.
- the number of terminals allocated to one beam is four, but the number of terminals allocated is not limited to four.
- the number of beams used simultaneously is not limited to this.
- the terminal T1 and the terminal T5 use the same resource on the frequency and time axis, that is, the same small area divided by frequency and time, but the reference for each terminal. Since the terminal-specific RS is used as the signal, the RS is different between the terminal T1 and the terminal T5. Further, the position of the RS is shifted by the granularity of the minimum resource unit (for example, LTE calls this as a resource element) composed of a frequency and a time axis. This is intended to ensure that the RSs do not overlap even when the signals of the beams B1 and B2 overlap, and to reduce the amount of interference between them.
- the minimum resource unit for example, LTE calls this as a resource element
- the terminal-specific RS can be created by, for example, the method described in Section 6.10.3 (UE-specific reference signals) of the document “3GPP TS36.211 V9.1.0”. Note that the method described in this document may not be used as long as a different RS can be generated for each terminal.
- the number of terminals allocated to each beam may be three or less.
- the number of small areas for each terminal in the N-PDCCH area can be reduced.
- a small area from the terminal T1 to the terminal T3 may be used as an N-PDCCH area
- an area described as being for the terminal T4 may be used as a PDSCH area.
- the boundary between the N-PDCCH region and the PDSCH region may be included in control information existing in a small region for each terminal in the N-PDCCH region.
- the terminal X when two terminals X and Y are allocated to the beam B1, the terminal X may be allocated to the area for the terminal T1, and the terminal Y may be allocated to the area for the terminal T3.
- the terminal X may be assigned to the area, and the terminal Y may be assigned to the area for the terminal T4.
- the PDSCH region for transmitting the data channel is dynamically allocated to each terminal based on the amount of data to be transmitted to each terminal that is simultaneously allocated to the same beam.
- FIG. 4 is a diagram of a configuration example of a base station that is a communication apparatus according to the first embodiment.
- FIG. 5 is a diagram of a configuration example of the terminal according to the first embodiment.
- the base station 1 configured as shown in FIG. 4 transmits and receives signals to and from the terminal 2 configured as shown in FIG. 5 using beamforming.
- the base station 1 can communicate with two or more terminals 2 simultaneously.
- the base station 1 can communicate with a plurality of terminals using one beam.
- the buffer 11 that temporarily holds data to be transmitted to and received from the communication network
- the control unit 12 that controls the antenna unit 16, and the like. Encodes and modulates data and control information associated therewith, and when data is received from the terminal 2, the modem 13 that demodulates and decodes the received signal, and when data is transmitted to the terminal 2
- an RS generation unit 14 that generates a unique RS for each data transmission destination terminal, and a signal output from the modem unit 13 and an RS output from the RS generation unit 14 when transmitting data to the terminal 2 Is converted from digital to analog and up-converted. When receiving data from the terminal 2, the received signal is down-converted and converted from analog to digital.
- Each component of the base station 1 shown in FIG. 4 may be realized by hardware or software. The same applies to base stations after the second embodiment.
- the buffer 11 is realized by a memory including a RAM (Random Access Memory), a ROM (Read Only Memory), and the like.
- the control unit 12 is realized by executing a program for operating as the control unit 12 by a processor such as a CPU (Central Processing Unit).
- the modem unit 13 is realized by a processor that performs a modem operation as a modem.
- the RS generation unit 14 is realized by a processor executing a program for operating as the RS generation unit 14.
- the transceiver 15 is realized by a processor or a dedicated circuit that performs frequency conversion or digital / analog signal conversion as a transceiver.
- the antenna unit 16 is realized by a plurality of antennas.
- the arrival direction estimation unit 17 is realized by a processor executing a program for operating as the arrival direction estimation unit 17.
- generation part 14, and the arrival direction estimation part 17 is mentioned later.
- the terminal 2 converts the signal output from the antenna unit 21 that transmits / receives a radio signal to / from the base station 1 and the modulation / demodulation unit 24 from digital to analog when transmitting data to the base station 1 and uploads the data.
- the received signal down-converts the received signal and converts it from analog to digital, and a plurality of types of RSs included in the received signal are sent to the own terminal.
- An RS detection unit 23 that detects a specific RS, and encodes and modulates data when transmitting data to the base station 1, and demodulates and decodes a received signal when receiving data from the base station 1.
- Each component of the terminal 2 illustrated in FIG. 5 may be realized by hardware or software. The same applies to terminals after the second embodiment.
- the antenna unit 21 is realized by an antenna.
- the transmission / reception unit 22 is realized by a processor or a dedicated circuit that performs frequency conversion or digital / analog signal conversion as a transceiver.
- the RS detection unit 23 is realized by a processor executing a program for operating as the RS detection unit 23.
- the modem unit 24 is realized by a processor that performs modulation / demodulation operations as a modem.
- the control unit 25 is realized by a processor executing a program for operating as the control unit 25.
- the communication system according to the present embodiment is characterized in that the base station 1 transmits data to the terminal 2. Therefore, the data transmission operation in the base station 1 and the data reception operation in the terminal 2 will be described, and the description of the operation in which the terminal 2 transmits data to the base station 1 will be omitted.
- the buffer 11 receives and accumulates data for terminals coming from the communication network.
- the control unit 12 holds each terminal ID of one or more terminals 2 that form a communication system with the base station 1. Further, it is assumed that the control unit 12 knows in which direction each terminal 2 existing in an area communicable with the own station is located when viewed from the own station. On the other hand, each terminal 2 knows where in the subframe the N-PDCCH region exists and how control information is arranged in the N-PDCCH region And That is, each of the terminals 2 knows the configuration of the N-PDCCH region shown in FIG. 3, and the N-PDCCH region has a maximum of four small regions, that is, terminal-specific RSs and control signals having the same transmission destination. Let's know that it is used divided into small areas for placement together.
- the control unit 12 When the base station 1 transmits data to the terminal 2, the control unit 12 first checks the state of the data stored in the buffer 11, and selects the data transmission destination, that is, the terminal 2 that transmits the data. At the same time, the position of the PDSCH assigned to the selected terminal 2 on the frequency axis, the modulation method, and the like are determined. There may be a plurality of terminals 2 as data transmission destinations. In this embodiment, since transmission using the subframe having the configuration shown in FIG. 3 is assumed, the maximum number of data transmission destinations per subframe of one beam is four. Note that the data transmission destination per subframe of one beam is four when there are four or more terminals 2 in the same direction as viewed from the base station 1. The method for selecting the terminal 2 that transmits data is not particularly defined.
- the selection is made in order from the terminal 2 with a large amount of data accumulation, or the selection is made according to the time when the data is accumulated in the buffer 11. You may make it select in consideration of the priority of data.
- the control unit 12 reads out data to be transmitted on the PDSCH, that is, data to be transmitted to the terminal 2 selected as the terminal 2 that transmits the data from the buffer 11 and outputs the data to the modem unit 13.
- the control unit 12 notifies the modulation / demodulation unit 13 of the control information configured to include the information determined for each terminal 2 that transmits data and the terminal ID.
- Information determined for each terminal 2 that transmits data, which is included in the control information is information such as the position on the frequency axis of the PDSCH, the modulation scheme, and the like.
- the modulation / demodulation unit 13 constituting the transmission signal generating unit first receives the data received from the control unit 12 according to the contents of the control information received from the control unit 12. Are encoded and modulated. When there are a plurality of data transmission destination terminals 2, encoding and modulation of data to be transmitted to each terminal 2 are performed individually. Next, the modem unit 13 encodes and modulates the control information received from the control unit 12.
- the pattern generated based on the terminal ID is a pseudo random pattern using the terminal ID as a seed.
- the CRC is generated, for example, by dividing the control information by the terminal ID.
- the RS generation unit 14 that constitutes the reference signal generation unit generates a terminal-specific RS that is a unique RS for each terminal, based on the terminal ID of the terminal that transmits data.
- the terminal-specific RS is used in a process of specifying control information used in data signal demodulation and decoding and a process of estimating a transmission path state in a data transmission destination terminal. That is, the data transmission destination terminal specifies the control information transmitted to the own terminal based on the terminal-specific RS and estimates the transmission path state.
- the terminal-specific RS is generated using the method described in Section 6.10.3 (UE-specific reference signals) of “3GPP TS 36.211 V9.1.0”, for example. You may produce
- the transmission / reception unit 15 constituting the transmission means includes a data signal which is a signal obtained by the modulation / demodulation unit 13 encoding and modulating the data for the terminal, and the modulation / demodulation unit 13 encodes and controls the control information.
- a control signal that is a signal obtained by performing modulation and a terminal-specific RS that is an RS generated by the RS generation unit 14 are received, and each received signal is a subframe having the configuration illustrated in FIGS. 1 and 3. Assign to.
- the transmission / reception unit 15 assigns the data signal to the PDSCH region, and assigns the control signal and the terminal-specific RS to the N-PDCCH region.
- the control signal and the terminal-specific RS are allocated to the same area in the N-PDCCH area.
- a data signal is assigned to the region for the terminal T1 in the PDSCH region shown in FIG. 3, and a control signal and a terminal-specific RS are assigned to the region for the terminal T1 in the N-PDCCH region.
- the transmission / reception unit 15 further sends data signals, control signals, and terminal-specific RSs to other data transmission destinations to each region for the terminal T2, each region for the terminal T3, or the terminal T4. Assign to each area.
- the transmission / reception unit 15 converts the signal generated by assigning the data signal, the control signal, and the terminal-specific RS to the subframe from digital to analog, and further up-converts the signal to a radio frequency signal.
- the antenna unit 16 includes, for example, a plurality of antennas whose directivities can be adjusted.
- the antenna unit 16 adjusts the directivity of each antenna according to an instruction from the control unit 12 to form a beam in the instructed direction, and transmits a radio signal output from the transmission / reception unit 15. At this time, the control unit 12 instructs the antenna unit 16 to form a beam in the direction in which the terminal 2 selected as the data transmission destination exists. It is also possible to configure the antenna unit 16 with a plurality of antennas with fixed directivities. In this case, each antenna has a different directivity, and the antenna unit 16 selects and uses an antenna having directivity in the direction instructed by the control unit 12.
- the arrival direction estimation unit 17 estimates the arrival direction of the signal transmitted from the communication partner terminal, that is, the direction in which the communication partner terminal exists.
- the arrival direction estimation unit 17 notifies the control unit 12 of the estimation result when the arrival direction is estimated.
- Many methods have been proposed for estimating the direction of arrival. For example, various methods are introduced in chapters 9 to 12 of the document "Adaptive signal processing using an array antenna" (Nobuyoshi Kikuma, Science and Technology Publishing). There are also methods different from those proposed in this document.
- the arrival direction estimation unit 17 estimates the arrival direction using any known method.
- the control unit 12 determines whether or not the adjustment of the beam generated by the antenna unit 16 is necessary based on the estimation result. That is, it is determined whether or not there is a deviation between the beam direction and the direction in which the communication partner terminal exists. If there is a deviation, the control unit 12 determines that beam adjustment is necessary and controls the antenna unit 16 so that the beam direction matches the direction in which the communication partner terminal exists. Even if the fixed beam is switched, for example, even if the beam used for transmission to the terminal T1 is switched from the beam B1 to the beam B2, the RS transmitted on the N-PDCCH of the terminal T1 does not change. To do.
- FIG. 6 is a flowchart showing the operation of the control unit 12 when the base station 1 transmits data to the terminal 2.
- the control unit 12 of the base station 1 selects a terminal 2 that is a data transmission destination (step S21), and generates control information to be transmitted to the selected terminal 2 (step S22).
- the control unit 12 outputs data and control information to be transmitted to the selected terminal 2 to the modem unit 13 (step S23).
- the control unit 12 instructs the antenna unit 16 to form a beam (step S24).
- the control unit 12 may determine whether or not adjustment of the direction of the beam formed by the antenna unit 16 is necessary, and may indicate the direction when adjustment is necessary. Regardless of whether or not adjustment of the direction is necessary, the direction may always be indicated.
- the RS generation unit 14 acquires a terminal ID from the modem unit 13 (step S31), and generates a terminal-specific RS based on the acquired terminal ID (step S32). Next, the RS generation unit 14 outputs the generated terminal-specific RS to the transmission / reception unit 15 (step S33).
- the operation of the arrival direction estimation unit 17 when the base station 1 transmits data to the terminal 2 is represented by a flowchart as shown in FIG.
- the arrival direction estimation unit 17 acquires the reception signal from the terminal 2 from the antenna unit 16 (step S41), and estimates the arrival direction of the signal transmitted from the terminal 2 based on the acquired reception signal (step S42). .
- the arrival direction estimation unit 17 notifies the control unit 12 of the estimation result (step S43).
- the control unit 12, the RS generation unit 14, and the arrival direction estimation unit 17 can be realized by the processing circuit 100 illustrated in FIG.
- the processing circuit 100 includes a processor 101 and a memory 102.
- the processor 101 is a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor, DSP), system LSI (Large Scale Integration), or the like.
- the memory 102 is a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), magnetic disk, flexible disk, optical disk, etc. , Compact disc, mini disc, DVD (Digital Versatile Disc), etc.
- the antenna unit 21 receives the radio signal from the base station 1 and outputs it to the transmission / reception unit 22.
- the transmission / reception unit 22 constituting the receiving unit down-converts the received radio signal and outputs it to the modem unit 24 and the RS detection unit 23.
- the RS detection unit 23 constituting the reference signal detection unit detects an RS specific to the terminal among a plurality of types of RSs included in the received signal received from the transmission / reception unit 22.
- the RS detection unit 23 When receiving the reception signal from the transmission / reception unit 22, the RS detection unit 23 extracts the RS included in the reception signal. Note that the control unit 25 of the terminal 2 knows where the RS is arranged in the signal transmitted from the base station 1, that is, the arrangement of the RS shown in FIG. 23 is notified from the control unit 25 of the arrangement of the RS shown in FIG. In the example of FIG. 3, the configuration is such that a maximum of four terminals share a channel, and the N-PDCCH region that is a control channel region is divided into four small regions, and different RSs are arranged in each small region. . Therefore, the RS detection unit 23 extracts four types of RSs from each of the four small regions.
- the RS detection unit 23 receives a notification of the terminal ID of the own terminal from the control unit 25, and generates an RS specific to the own terminal based on the notified terminal ID.
- the RS is generated by the same method as the method used by the RS generation unit 14 of the base station 1.
- the RS detection unit 23 compares each of the extracted four types of RSs with the generated unique RS to obtain a correlation value. Of the four obtained correlation values, the RS from which the maximum value is obtained is likely to be an RS unique to the own terminal, that is, the RS generated by the base station 1 based on the terminal ID of the own terminal. Judge.
- the RS detection unit 23 sets the RS to the own terminal.
- the modulation / demodulation unit 24 receives a small area that has a high possibility of including an inherent RS, that is, a small area that includes an RS that has the highest correlation with an RS unique to the terminal generated based on the terminal ID of the terminal. Notice.
- the modulation / demodulation unit 24 constituting the demodulation means When receiving the notification of the processing result from the RS detection unit 23, the modulation / demodulation unit 24 constituting the demodulation means first starts from the base station 1 based on the RS included in the small area notified from the RS detection unit 23. Estimate the state of the transmission path to the device. Next, the modem unit 24 demodulates the control signal included in the small area notified from the RS detection unit 23 using the transmission path estimation result, and further performs decoding to restore the control information. . The terminal performs CRC check with its own terminal ID in decoding, and if decoding is successful, finally determines that the information obtained by the decoding is control information addressed to the terminal.
- the modem unit 24 demodulates and decodes the data signal according to the restored control information.
- the RS detection unit 23 notifies the modulation / demodulation unit 24 of the second most likely small area that contained the RS unique to the terminal, and the modulation / demodulation unit 24 demodulates the notified small region. You may make it perform.
- FIG. 10 is a flowchart illustrating the operation of the control unit 25 when the terminal 2 receives data from the base station 1.
- the control unit 25 acquires RS arrangement information from the base station 1 (step S51), and notifies the RS detection unit 23 of the RS arrangement (step S52).
- the timing at which the control unit 25 acquires RS arrangement information from the base station 1 is, for example, the timing at which the terminal 2 is connected to the base station 1.
- the control unit 25 of the terminal 2 holds information on the RS arrangement in advance. You may keep it.
- FIG. 11 is a flowchart illustrating the operation of the RS detection unit 23 when the terminal 2 receives data from the base station 1.
- the RS detection unit 23 extracts the RS from the received signal (step S61).
- step S61 the RS detection unit 23 extracts all RSs inserted in the received signal.
- the RS detection unit 23 generates a terminal-specific RS that is an RS specific to the terminal itself based on the terminal ID of the terminal itself (step S62).
- the RS detection unit 23 compares each RS extracted in step S61 with the terminal-specific RS generated in step S62, and determines a small region in which the RS having the highest correlation with the terminal-specific RS is inserted. 24 is notified (step S63).
- the control unit 25 and the RS detection unit 23 can be realized by the processing circuit 100 shown in FIG.
- base station 1 when transmitting data to terminal 2, base station 1 generates a terminal-specific RS, which is a reference signal specific to data transmission destination terminal 2, and demodulates and decodes the data signal. Control information and terminal-specific RS necessary for transmission are arranged and transmitted in the same area in the control channel.
- the terminal 2 generates a terminal-specific RS that is a reference signal specific to the terminal itself by the same method as the base station 1, and correlates the generated terminal-specific RS and a plurality of types of RSs included in the received signal.
- the data signal is demodulated and decoded using the control information arranged in the same area as the RS having the maximum correlation.
- the base station 1 that transmits a signal only uses the terminal-specific RS when transmitting the N-PDCCH and PDSCH to each terminal 2.
- the terminal 2 receives the N-PDCCH signal
- FIG. 12 in the case where the side lobe of the beam B1 is oriented in the main lobe direction of the beam B2, there is a possibility that the reception operation is adversely affected.
- precoding is used in the present embodiment.
- interference between beams can be prevented by performing precoding on the transmission side.
- the base station when the base station performs precoding, the side lobe of the beam B1 is suppressed, and the amount of interference with the beam B2 can be reduced.
- the precoding for example, the beam T1 and the beam B2 are transmitted in a state in which the precoding is not performed, and the influence of the signal of the beam B1 is measured at the terminal T2 that receives the beam B2. Using the result, the base station performs processing such that the influence of the beam B1 on the beam B2 is canceled in advance.
- FIG. 13 is a diagram illustrating a configuration example of the base station according to the second embodiment
- FIG. 14 is a diagram illustrating a configuration example of the terminal according to the second embodiment.
- the base station 1a of the present embodiment has a configuration in which a precoding unit 18 is added to the base station 1 of the first embodiment shown in FIG. 4 and the control unit 12 is replaced with a control unit 12a.
- the terminal 2a of the present embodiment has a configuration in which a channel estimation unit 26 is added to the terminal 2 of the first embodiment shown in FIG. 5 and the control unit 25 is replaced with a control unit 25a.
- the precoding unit 18 is realized, for example, by a processor executing a program for operating as the precoding unit 18. In this embodiment, a structure and operation different from those in Embodiment 1 are described.
- the precoding unit 18 of the base station 1a constitutes precoding means.
- the precoding unit 18 receives the data signal and the control signal generated by the modulation / demodulation unit 13 encoding and modulating the data and the control information. Precoding is performed on the signal. Specifically, the transmission weight calculated based on the channel estimation value indicating the state of the transmission path from the base station 1a to the terminal 2a is multiplied by the data signal and the control signal.
- the precoding unit 18 outputs a signal obtained by performing precoding to the transmission / reception unit 15.
- the transmission weight may be calculated by the precoding unit 18 or the control unit 12a.
- the channel estimation value necessary for calculating the transmission weight is obtained from the data transmission destination terminal 2a.
- the control unit 12a When the precoding unit 18 calculates the transmission weight, the control unit 12a extracts the channel estimation value from the signal output from the modulation / demodulation unit 13, and uses the extracted channel estimation value via the modulation / demodulation unit 13 as a precoding unit. Pass to 18.
- the channel estimation value may be directly passed from the control unit 12a to the precoding unit 18.
- the control unit 12a calculates the transmission weight
- the control unit 12a extracts the channel estimation value from the signal output from the modulation / demodulation unit 13 to calculate the transmission weight, and the calculated transmission weight is transmitted via the modulation / demodulation unit 13.
- the transmission weight may be directly passed from the control unit 12a to the precoding unit 18.
- the precoding unit 18 In the signal reception operation from the terminal 2a, the precoding unit 18 outputs the output signal from the transmission / reception unit 15 to the modulation / demodulation unit 13 as it is.
- the channel estimation unit 26 receives the channel estimation signal transmitted from the base station 1a, estimates the state of the transmission path, generates a channel estimation value indicating the estimation result, and reports it to the control unit 25a.
- the channel estimation signal may be the terminal-specific RS described in Embodiment 1, or another signal may be separately prepared.
- the control unit 25a transmits the channel estimation value received from the channel estimation unit 26 to the base station 1a via the modulation / demodulation unit 24, the transmission / reception unit 22, and the antenna unit 21.
- the base station 1a since the base station 1a according to the present embodiment performs precoding on the data signal and the control signal, interference between beams can be suppressed and communication quality can be improved. .
- each terminal uses RS individually assigned to its own terminal to specify control information addressed to itself, but in this embodiment, each terminal However, the structure which specifies the control information addressed to the own terminal using another method is described.
- the subframe having the configuration shown in FIG. 15 is used.
- the terminal number notification area is provided at the head position of the subframe, but may be provided at other positions.
- FIG. 16 shows an example of terminal number arrangement in the terminal number notification area. In the example shown in FIG. 16, the terminal number notification area and the PDCCH area are divided into four small areas, and a maximum of four terminals are allocated to one subframe.
- 16 shows a state in which four terminals are allocated to the subframes of beams B1 and B2, and two terminals are allocated to the subframe of beam B3.
- the terminal number of each terminal is assigned to the terminal number notification area of beam B1.
- the terminal number of each terminal is assigned to the terminal number notification area of beam B2.
- the beam B3 since only two terminals are assigned to the beam B3, only a part of the terminal number notification area and the PDCCH area is used. This is because the configuration of the terminal number notification area and the PDCCH area is fixed.
- the terminal number may be any information as long as the information uniquely indicates the terminal.
- a part of the PDSCH region of the beam B3 is not used, but an unused region of the PDSCH region may be allocated to one or both of the terminals T9 and T10.
- the terminal is assumed to know the subframe configuration in advance. That is, the arrangement of the PDCCH region, the terminal number notification region, and the PDSCH region is assumed to be known on the terminal side of the signal transmission destination.
- FIG. 17 is a diagram illustrating a configuration example of the base station according to the third embodiment
- FIG. 18 is a diagram illustrating a configuration example of the terminal according to the third embodiment.
- the base station 1b of the present embodiment includes a control unit 12, a modulation / demodulation unit 13, an RS generation unit 14, and a transmission / reception unit 15 of the base station 1 of the first embodiment shown in FIG.
- the configuration is replaced with an RS generation unit 14b and a transmission / reception unit 15b.
- the terminal 2b of the present embodiment deletes the RS detection unit 23 from the terminal 2 of the first embodiment shown in FIG. 5, adds a terminal number detection unit 27, and further converts the modem unit 24 into the modem unit 24b. It has a replaced configuration.
- the terminal number detection unit 27 is realized, for example, by a processor executing a program for operating as the terminal number detection unit 27. In this embodiment, a structure and operation different from those in Embodiment 1 are described.
- the control unit 12b selects the terminal 2b that transmits data, the position on the frequency axis of the PDSCH assigned to the selected terminal 2b, and the modulation scheme And make decisions. Further, the control unit 12b reads data to be transmitted on the PDSCH from the buffer 11 and outputs the data to the modem unit 13b. At this time, the control unit 12b determines, for each terminal 2b that transmits data, control information that includes information such as information such as a position on the frequency axis of the PDCCH and a terminal ID, and subframes. The modem number 13b is notified of the terminal number to be placed in the terminal number notification area. For example, when the terminal 2b first connects to the base station 1b, the terminal number is determined by the base station 1b and notified to the terminal 2b. If there is no problem in the amount of information to be transmitted, the terminal ID may be used as the terminal number.
- the modulation / demodulation unit 13b When receiving the data to be transmitted to the terminal 2b, the control information, and the terminal number from the control unit 12b, the modulation / demodulation unit 13b first performs data encoding and modulation according to the content of the received control information. Also, the control information is encoded and modulated. Further, the terminal number, which is transmission destination information, is encoded and modulated. It is assumed that the modulation method for modulating the control information and the terminal number is fixed, and the terminal 2b knows this modulation method.
- the RS generation unit 14b generates a beam-specific RS that is a unique RS for each beam.
- the transmission / reception unit 15b includes a data signal which is a signal obtained by the modulation / demodulation unit 13b encoding and modulating the data for the terminal, and the modulation / demodulation unit 13b performs encoding and modulation on the control information.
- a control signal that is an obtained signal a transmission destination information signal that is a signal obtained by the modulation / demodulation unit 13b encoding and modulating the terminal number, and a beam-specific RS generated by the RS generation unit 14b.
- each received signal is assigned to a subframe having the configuration shown in FIGS. 15 and 16.
- the transmission / reception unit 15b assigns a data signal to the PDSCH region, assigns a control signal and a terminal-specific RS to the PDCCH region, and assigns a transmission destination information signal to the terminal number notification region. Then, the transmission / reception unit 15b converts the signal generated by assigning the data signal, the control signal, the terminal-specific RS, and the transmission destination information signal to the subframe from digital to analog, and further up-converts the signal to a radio frequency signal.
- the control unit 12b when the control unit 12b receives the estimation result from the arrival direction estimation unit 17, the beam generated by the antenna unit 16 needs to be adjusted based on the estimation result. Determine whether or not. If there is a deviation between the direction of the beam and the direction in which the communication partner terminal 2b exists, the control unit 12b controls the antenna unit 16 so that the beam direction of the communication partner terminal 2b exists.
- the control unit 12b The terminal number of the terminal T1 set in the terminal number notification area is changed to be set in the terminal number notification area of the beam B3.
- the modem unit 24b constituting the transmission destination information restoring unit and the demodulating unit uses the beam specific RS for the transmission path. Based on the estimation result, the terminal number notification area is demodulated and decoded to restore the terminal number. It is assumed that the terminal 2b knows in advance where the terminal number notification area exists in the subframe.
- the modem unit 24b notifies the terminal number detection unit 27 of the restored terminal number, and the terminal number detection unit 27 checks whether or not the terminal number of the terminal itself is included in the notified terminal number. When the terminal number detection unit 27 detects the terminal number of its own terminal, the terminal number detection unit 27 notifies the modem unit 24b to that effect.
- the modem unit 24b demodulates and decodes the PDCCH region for the signal received by the beam whose terminal number is detected, and restores the control information. Then, the modem unit 24b further demodulates and decodes the PDSCH region using the control information determined to be addressed to the terminal by the CRC check among the restored control information.
- the terminal number detection unit 27 detects the terminal number of the own terminal, but the control unit 25 may detect the terminal number of the own terminal.
- the size of the terminal number notification area is fixed regardless of the number of terminals to which the PDCCH and PDSCH are assigned to one subframe.
- the reason for fixing the size is to simplify the processing in the terminal 2b.
- encoding for error correction or error detection may or may not be performed on the terminal number. When encoding is performed, one encoding is performed in a range in which all terminal numbers are collected for each beam.
- the terminal 2b first demodulates and decodes each beam only for the terminal number notification area which is a small area. Next, PDCCH and PDSCH demodulation and decoding operations are performed on the beam whose terminal number is detected. Therefore, it is possible to prevent the processing amount of the terminal 2b from increasing compared to the case where the demodulation and decoding operations are performed on the PDCCH region of all beams. Further, when beam switching is necessary, beam switching can be performed quickly. Furthermore, compared with the method described in Patent Document 1 described above, the possibility that the control channel region, that is, the PDCCH region is insufficient, can be reduced.
- terminals # 1 to # 4 which are first small areas in which terminal numbers can exist
- PDCCH areas # 1 to # 4 which are second small areas in which control information can exist.
- the terminal 2b in which the terminal number of its own terminal is detected. ) Only needs to be demodulated and decoded, so that the amount of processing can be prevented from increasing.
- the terminal 2b demodulates and decodes the PDCCH area # 1.
- the terminal 2b performs demodulation and decoding on the PDCCH area # 2.
- the terminal 2b demodulates and decodes the PDCCH area # 3.
- the terminal 2b demodulates and decodes the PDCCH area # 4.
- the base station 1b of the present embodiment adds the terminal number to the data signal and the control signal and transmits the data signal, and the terminal 2b first demodulates and decodes the area where the terminal number exists, Data signals and control signals are demodulated and decoded for a beam including the terminal number of the terminal itself. Thereby, it is possible to prevent the processing amount of the operation for detecting the control signal addressed to the terminal 2b from increasing. In addition, effective use of radio resources for control signal transmission can be realized.
- Embodiment 4 FIG. A fourth embodiment will be described.
- a beam-specific RS that is a unique RS for each beam is used.
- a subframe having a configuration in which the position of the PDCCH region is fixed for each terminal is used.
- FIG. 20 is a diagram illustrating a configuration example of the base station according to the fourth embodiment
- FIG. 21 is a diagram illustrating a configuration example of the terminal according to the fourth embodiment.
- the base station 1c of the present embodiment replaces the control unit 12b, the modem unit 13b, and the transmission / reception unit 15b of the base station 1b of the third embodiment shown in FIG. 17 with the control unit 12, the modem unit 13 and the transmission / reception unit 15c. It becomes the composition.
- the control unit 12 and the modem unit 13 are the same as the control unit 12 and the modem unit 13 included in the base station 1 of the first embodiment shown in FIG.
- the terminal 2c of the present embodiment has a configuration in which the modem unit 24b of the terminal 2b of the third embodiment shown in FIG. 18 is replaced with a modem unit 24c, and the terminal number detection unit 27 is deleted. In this embodiment, a configuration and operation different from those in any of Embodiments 1 and 3 will be described.
- the terminal 2c receives all the beams, but performs demodulation and decoding operations only on a predetermined position, that is, a specific area within the PDCCH area that is assigned to carry control information addressed to itself. Just do it.
- the transmission / reception unit 15c when the transmission / reception unit 15c receives the data signal, the control signal, and the beam specific RS, the transmission / reception unit 15c places the received signal on the subframe having the configuration illustrated in FIG. That is, the terminal number notification area is placed in the subframe having the configuration shown in FIG. Specifically, the transmission / reception unit 15c places the data signal on the PDSCH region, and places the control signal and the beam specific RS on the PDCCH region. At this time, the control signal is placed in a specific area determined in advance for each terminal 2c as the transmission destination. For example, when the terminal 2c first connects to the base station 1c, the base station 1c determines and notifies the terminal 2c of which area in the PDCCH area the control signal is to be placed on.
- the modem unit 24c first demodulates and decodes a predetermined specific area in the PDCCH area, and restores control information addressed to the terminal itself. Then, demodulation and decoding of the PDSCH region are performed using the control information determined to be addressed to the terminal by the CRC check.
- FIG. 22 is a flowchart illustrating an example of an operation performed by the base station 1c according to the fourth embodiment when beam switching occurs.
- the control unit 12 constituting the control signal arrangement determining unit first switches the terminal Tm that needs to be switched to the beam Bn (step S11). Next, it is confirmed whether or not an area to which control information addressed to the terminal Tm is allocated overlaps with an area to which control information addressed to another terminal that has been communicating with the beam Bn from before has overlapped (step S12). If the areas do not overlap as a result of the confirmation (step S12: No), the control unit 12 ends the operation. In this case, in the subsequent control information transmission addressed to the terminal Tm, the base station 1c assigns the control information addressed to the terminal Tm to the same area as before the beam switching.
- step S12 when the areas overlap (step S12: Yes), the control unit 12 changes the area to which the control information addressed to the terminal Tm is assigned (step S13). Further, the control unit 12 notifies the terminal Tm of the changed area via the modem unit 13, the transmission / reception unit 15c, and the antenna unit 16 (step S14).
- the base station 1c transmits control information on a specific area in the PDCCH area that is determined in advance with the terminal 2c.
- the reception process is performed in comparison with the case where the terminal performs demodulation and decoding of the PDCCH region in a state where the position where control information addressed to the terminal is placed is indefinite for all beams.
- the terminal 2c targets only a predetermined specific area in the PDCCH area, specifically, a specific area determined as an area for placing control information addressed to the terminal itself. Therefore, the amount of processing can be prevented from increasing.
- the time required for the processing is shortened with the simplification of the reception processing, the beam can be switched quickly when the beam switching is necessary.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
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Abstract
Description
図1および図3は、実施の形態1にかかる通信装置が送信する制御チャネルの構成例を示す図である。以下、説明の便宜上、図1および図3に示した制御チャネルをN-PDCCHと記載する。
上記実施の形態1では、信号を送信する基地局1は、各端末2にN-PDCCHおよびPDSCHを送る際に端末固有RSを用いるのみであった。しかし、この場合、端末2でN-PDCCH信号を受信する際にビーム間の干渉が発生し、信号を正しく受信できない可能性がある。具体的には、図12に示したような、ビームB1のサイドローブがビームB2のメインローブ方向に向いているケースなどにおいて干渉が発生し、受信動作に悪影響を与える可能性がある。この問題の対策として、本実施の形態では、プリコーディングを使用する。
上述した実施の形態1および2では、各端末は、自端末に個別に割り当てられたRSを使用して、自端末宛ての制御情報を特定することとしたが、本実施の形態では、各端末が他の方法を使用して自端末宛ての制御情報を特定する構成について説明する。
実施の形態4について説明する。本実施の形態は、実施の形態3と同様に、ビームごとに固有のRSであるビーム固有RSを使用する。また、本実施の形態では、PDCCH領域の位置を端末毎に固定とした構成のサブフレームを使用する。
Claims (9)
- ビームフォーミングを使用して信号を送信する通信装置であって、
1つ以上のデータを個別に符号化および変調してデータ信号を生成するとともに、前記データ信号の受信処理で使用される、前記データと同数の制御情報を個別に符号化および変調して制御信号を生成する送信信号生成手段と、
前記データ信号および前記制御信号の受信処理における伝送路推定で使用される、送信先ごとに固有の参照信号を生成する参照信号生成手段と、
前記データ信号をデータチャネルに配置し、前記制御信号および前記参照信号を、送信先が同じもの同士が同じ領域に存在するよう制御チャネルに配置して送信する送信手段と、
を備えることを特徴とする通信装置。 - 前記送信信号生成手段から出力される前記データ信号および前記制御信号をプリコーディングするプリコーディング手段、
をさらに備え、
前記送信手段は、前記プリコーディング手段でプリコーディングされた後のデータ信号および制御信号を送信することを特徴とする請求項1に記載の通信装置。 - ビームフォーミングを使用して信号を送信する通信装置であって、
1つ以上のデータを個別に符号化および変調してデータ信号を生成するとともに、前記データ信号の受信処理で使用される、前記データと同数の制御情報を個別に符号化および変調して制御信号を生成し、さらに、前記データ信号および前記制御信号の送信先を一意に示す、前記データと同数の送信先情報を符号化および変調して送信先情報信号を生成する送信信号生成手段と、
前記データ信号、前記制御信号および前記送信先情報信号の受信処理における伝送路推定で使用される、ビームごとに固有の参照信号を生成する参照信号生成手段と、
前記データ信号をデータチャネルに配置し、前記制御信号および前記参照信号を制御チャネルに配置し、前記送信先情報信号を受信側で既知の領域に配置して送信する送信手段と、
を備えることを特徴とする通信装置。 - 前記受信側で既知の領域は複数の第1の小領域により構成され、
前記複数の第1の小領域の各々は、前記制御チャネルにおける、前記制御チャネルが配置されうる複数の第2の小領域のいずれか一つと対応付けられている、
ことを特徴とする請求項3に記載の通信装置。 - ビームフォーミングを使用して信号を送信する通信装置であって、
1つ以上のデータを個別に符号化および変調してデータ信号を生成するとともに、前記データ信号の受信処理で使用される、前記データと同数の制御情報を個別に符号化および変調して制御信号を生成する送信信号生成手段と、
前記データ信号および前記制御信号の受信処理における伝送路推定で使用される、ビームごとに固有の参照信号を生成する参照信号生成手段と、
前記データ信号をデータチャネルに配置し、前記制御信号を、制御チャネル内の受信側で既知の特定領域に配置するとともに、前記参照信号を前記制御チャネルに配置して送信する送信手段と、
を備えることを特徴とする通信装置。 - 特定の送信先に対する前記データ信号、前記制御信号および前記参照信号の送信で使用するビームを切り替える必要がある場合に、切り替える前のビームを使用した送信で前記制御信号が配置されていた制御チャネル内の領域と同じ領域に配置されて切り替え先のビームで送信されている他の制御信号が存在するか否かを確認し、他の制御信号が存在しない場合、前記制御信号をビームを切り替える前と同じ領域に配置して切り替え先のビームで送信することに決定し、他の制御信号が存在している場合、他の制御チャネルが存在している領域とは異なる領域に前記制御信号を配置して切り替え先のビームで送信することに決定し、決定結果を前記特定の送信先へ通知する制御信号配置決定手段、
を備えることを特徴とする請求項5に記載の通信装置。 - 1つ以上のデータを個別に符号化および変調して生成されたデータ信号が配置されるデータチャネルと、前記データ信号の受信処理で使用される前記データと同数の制御情報を個別に符号化および変調して生成された制御信号および前記制御信号と同数の参照信号が配置される制御チャネルと、を含み、前記制御チャネルと前記参照信号は1対1で対応付けられ、かつ前記制御チャネル内に設けられている複数の固定領域のいずれか一つに配置されている信号を受信する通信装置であって、
前記データチャネルおよび前記制御チャネルを受信する受信手段と、
前記受信手段が受信した前記制御チャネルに含まれている前記参照信号の中から、予め自装置に割り当てられている参照信号との相関が最も高い参照信号を検出する参照信号検出手段と、
前記参照信号検出手段が検出した参照信号と同じ前記固定領域に配置されている制御信号の復調および復号を行い、復号が成功した場合に、復元された制御情報を使用してデータ信号の復調および復号を行う復調手段と、
を備えることを特徴とする通信装置。 - 1つ以上のデータを個別に符号化および変調して生成されたデータ信号が配置されるデータチャネルと、前記データ信号の受信処理で使用される前記データと同数の制御情報を個別に符号化および変調して生成された制御信号が配置される制御チャネルと、前記データ信号および前記制御信号の送信先を一意に示す、前記データと同数の送信先情報を符号化および変調して生成された送信先情報信号と、を含んだ信号を受信する通信装置であって、
前記データチャネル、前記制御チャネルおよび前記送信先情報信号を受信する受信手段と、
前記受信手段が受信した前記送信先情報信号の復調および復号を行って前記送信先情報を復元する送信先情報復元手段と、
前記送信先情報復元手段で復元された送信先情報の中に自装置を示しているものが存在する場合に、前記制御信号および前記データ信号の復調および復号を行う復調手段と、
を備えることを特徴とする通信装置。 - 1つ以上のデータを個別に符号化および変調して生成されたデータ信号が配置されるデータチャネルと、前記データ信号の受信処理で使用される前記データと同数の制御情報を個別に符号化および変調して生成された制御信号が配置される制御チャネルと、を含んだ信号を受信する通信装置であって、
前記データチャネルおよび前記制御チャネルを受信する受信手段と、
前記受信手段が受信した前記制御チャネルに含まれている制御信号のうち、当該制御信号の送信元の通信装置から予め通知されている前記制御チャネル内の特定領域に存在する制御信号の復調および復号を行い、復号が成功した場合に、復元された制御情報を使用してデータ信号の復調および復号を行う復調手段と、
を備えることを特徴とする通信装置。
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CN201680008886.1A CN107211422B (zh) | 2015-02-09 | 2016-01-29 | 通信装置 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018207297A1 (ja) * | 2017-05-10 | 2018-11-15 | 富士通株式会社 | 基地局装置、端末装置、送信間隔制御方法及び無線通信システム |
CN110574303A (zh) * | 2017-04-27 | 2019-12-13 | 三菱电机株式会社 | 发送装置和接收装置 |
JP2020504527A (ja) * | 2017-01-04 | 2020-02-06 | コーヒレント・ロジックス・インコーポレーテッド | Dciブラインド検出のためにue idを凍結ビットに埋め込むスクランブル系列設計 |
WO2020145045A1 (ja) * | 2019-01-09 | 2020-07-16 | ソニー株式会社 | 通信装置、通信制御装置、通信方法及び通信制御方法 |
JP2021503213A (ja) * | 2017-11-17 | 2021-02-04 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | データ伝送方法および装置 |
JP2022511191A (ja) * | 2018-11-02 | 2022-01-31 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | ダウンリンク制御チャネル動作に関与する移動端末及び基地局 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180294859A1 (en) * | 2015-10-07 | 2018-10-11 | Intel IP Corporation | Dynamically beamformed control channel for beamformed cells |
US11477771B2 (en) * | 2016-04-05 | 2022-10-18 | Qualcomm Incorporated | Indicating start and stop symbols of PDSCH and PUSCH through PDCCH |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009023863A1 (en) * | 2007-08-15 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for beamforming of control information in a wireless communication system |
JP2010232796A (ja) * | 2009-03-26 | 2010-10-14 | Kyocera Corp | 無線基地局、無線基地局におけるサウンディング制御方法、および無線基地局におけるサウンディング制御プログラム |
US20150249517A1 (en) * | 2012-09-12 | 2015-09-03 | Lg Electronics Inc. | Method for receiving signal using interference removal scheme and apparatus for same in wireless communication system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4624355B2 (ja) * | 2004-07-30 | 2011-02-02 | パナソニック株式会社 | 無線送信装置および無線送信方法 |
JP2007235201A (ja) * | 2006-02-27 | 2007-09-13 | Toshiba Corp | 基地局および無線通信方法 |
JP4898818B2 (ja) * | 2006-09-20 | 2012-03-21 | シャープ株式会社 | 無線通信装置、無線通信システムおよび無線通信方法 |
US8971241B2 (en) * | 2008-09-30 | 2015-03-03 | Qualcolmm Incorporated | Techniques for supporting relay operation in wireless communication systems |
US20110176519A1 (en) * | 2009-11-17 | 2011-07-21 | Pavan Kumar Vitthaladevuni | Signalling of Multiple-User Multiple-Input and Multiple-Output Transmissions in High-Speed Packet Access Systems |
JP5616284B2 (ja) * | 2011-05-02 | 2014-10-29 | 株式会社Nttドコモ | 基地局装置、移動端末装置、通信システム及び通信方法 |
GB2493154A (en) * | 2011-07-25 | 2013-01-30 | Nec Corp | Communicating control channel reference signal patterns in the control region of a sub-frame in a cellular communication system |
KR101890419B1 (ko) * | 2012-01-16 | 2018-08-21 | 삼성전자주식회사 | 기준신호를 송수신하기 위한 방법 및 장치 |
US9019924B2 (en) * | 2012-04-04 | 2015-04-28 | Samsung Electronics Co., Ltd. | High-order multiple-user multiple-input multiple-output operation for wireless communication systems |
US20130286960A1 (en) * | 2012-04-30 | 2013-10-31 | Samsung Electronics Co., Ltd | Apparatus and method for control channel beam management in a wireless system with a large number of antennas |
US9750003B2 (en) * | 2012-12-21 | 2017-08-29 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving control channel by beamforming in a wireless communication system |
US9560660B1 (en) * | 2014-09-25 | 2017-01-31 | Sprint Spectrum L.P. | Method and system of managing an allocation of resources |
-
2016
- 2016-01-29 JP JP2016574729A patent/JP6377184B2/ja active Active
- 2016-01-29 WO PCT/JP2016/052705 patent/WO2016129417A1/ja active Application Filing
- 2016-01-29 CN CN201680008886.1A patent/CN107211422B/zh active Active
- 2016-01-29 EP EP16749061.4A patent/EP3258729A4/en not_active Withdrawn
- 2016-01-29 US US15/549,405 patent/US20180041995A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009023863A1 (en) * | 2007-08-15 | 2009-02-19 | Qualcomm Incorporated | Method and apparatus for beamforming of control information in a wireless communication system |
JP2010232796A (ja) * | 2009-03-26 | 2010-10-14 | Kyocera Corp | 無線基地局、無線基地局におけるサウンディング制御方法、および無線基地局におけるサウンディング制御プログラム |
US20150249517A1 (en) * | 2012-09-12 | 2015-09-03 | Lg Electronics Inc. | Method for receiving signal using interference removal scheme and apparatus for same in wireless communication system |
Non-Patent Citations (1)
Title |
---|
See also references of EP3258729A4 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11350404B2 (en) | 2017-01-04 | 2022-05-31 | Coherent Logix, Incorporated | Scrambling sequence design for embedding receiver ID into frozen bits for blind detection |
JP7364466B2 (ja) | 2017-01-04 | 2023-10-18 | コーヒレント・ロジックス・インコーポレーテッド | Dciブラインド検出のためにue idを凍結ビットに埋め込むスクランブル系列設計 |
JP2020504527A (ja) * | 2017-01-04 | 2020-02-06 | コーヒレント・ロジックス・インコーポレーテッド | Dciブラインド検出のためにue idを凍結ビットに埋め込むスクランブル系列設計 |
CN110574303B (zh) * | 2017-04-27 | 2021-12-31 | 三菱电机株式会社 | 发送装置和接收装置 |
CN110574303A (zh) * | 2017-04-27 | 2019-12-13 | 三菱电机株式会社 | 发送装置和接收装置 |
WO2018207297A1 (ja) * | 2017-05-10 | 2018-11-15 | 富士通株式会社 | 基地局装置、端末装置、送信間隔制御方法及び無線通信システム |
JP2021503213A (ja) * | 2017-11-17 | 2021-02-04 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | データ伝送方法および装置 |
US11309950B2 (en) | 2017-11-17 | 2022-04-19 | Huawei Technologies Co., Ltd. | Data transmission method and apparatus |
JP2022511191A (ja) * | 2018-11-02 | 2022-01-31 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | ダウンリンク制御チャネル動作に関与する移動端末及び基地局 |
JP7450556B2 (ja) | 2018-11-02 | 2024-03-15 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | 移動端末、基地局、受信方法、送信方法及び集積回路 |
JPWO2020145045A1 (ja) * | 2019-01-09 | 2021-11-18 | ソニーグループ株式会社 | 通信装置、通信制御装置、通信方法及び通信制御方法 |
WO2020145045A1 (ja) * | 2019-01-09 | 2020-07-16 | ソニー株式会社 | 通信装置、通信制御装置、通信方法及び通信制御方法 |
US11489580B2 (en) | 2019-01-09 | 2022-11-01 | Sony Group Corporation | Communication device, communication control device, communication method, and communication control method |
JP7468364B2 (ja) | 2019-01-09 | 2024-04-16 | ソニーグループ株式会社 | 通信装置、通信制御装置、通信方法及び通信制御方法 |
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JP6377184B2 (ja) | 2018-08-22 |
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